• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a quick-change structure for a multifunction saw comprising a head box (5), a tool holder (12) and an output device comprising an output shaft (10). This structure also comprises a quick-change device comprising a quick-change lever (1), an eccentric block (2), a movable rod (11), a spring-loaded mandrel (13), a tensioning rod (14) and a compression spring (7). The quick change lever (1) and the eccentric block (2) are connected to the top of the head box (5) via a pin (4). The movable rod (11) is disposed in the output shaft (10) with its upper end connected to the eccentric block (2) and its lower end connected to the tensioning rod (14) via a thread.
    公开号:FR3043350A3
    申请号:FR1750933
    申请日:2017-02-03
    公开日:2017-05-12
    发明作者:Jinyun Gao；Zhiming Feng
    申请人:ZHEJIANG JINMEI ELECTRIC TOOLS CO Ltd；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The invention belongs to the technical field of mechanical equipment and relates to a removable structure for the rapid separation or reassembly of the working head and the machine body of a power tool with head replacement, and particularly relates to a structure of quick replacement of a multi-function saw. The invention also relates to a method for rapid replacement of the fast replacement structure of the multi-function saw.
    Technical background
    Multi-function saws can be used to attach wood saw blades, hacksaw blades, or triangular sanding discs. The attachment of wood saw blades or hacksaw blades allows the cutting and processing of wooden boards, aluminum alloy materials, as well as other metallic materials. Attaching triangular sanding discs attached with sandpaper allows the sanding and polishing of wooden planks, plasterboard or wall surfaces.
    Most multifunction saws currently on the market include pressing plates and hexagonal head screws, such saws requiring specific tools for attaching or unscrewing saw blades during their replacement. The structure and the means of replacement of this type of multifunction saw face in practice difficulties, including problems during assembly or disassembly. In addition, such saws require a transportable hex key that can be easily lost. Moreover, without a locking safety structure, these saws carry a potential safety risk that can cause bodily injury to their users. Summary of the invention
    In order to overcome the aforementioned defects, to widen the field of application and to improve the use of this type of saw, the invention proposes a fast replacement structure of a multifunction saw, allowing the rapid replacement of the blades of the saw. and ensuring both user security during this replacement process.
    In order to achieve such an object, the technical support provided by the invention is as follows. The invention proposes a quick-change structure for a multifunction saw comprising a head box, a tool holder and an output device, the output device comprising an output shaft, this structure further comprising a quick-change device , the rapid replacement device comprising a quick-change lever, an eccentric block, a movable rod, a spring-loaded chuck, a tensioning rod, a compression spring, the quick-change lever and the eccentric block being connected to the top of the head housing by means of a pin, the movable rod being installed in the output shaft, the upper end of the movable rod being connected to the eccentric block, the lower end of the movable rod being connected to the Thread tensioning rod, one outer side of the tensioning rod being covered by the spring mandrel, one outer side of the spring mandrel being covered by the compression spring, the upper end of the compression spring being connected to the lower surface of the movable rod and its upper end being connected to the upper surface of the tool holder, the tool holder being disposed at the bottom of the the output shaft, a slope narrowing from top to bottom inwards being formed on the inner face of the tool holder, a bead facing the slope being formed on the outer surface of the spring mandrel, this structure comprising in in addition to a gap between the upper end of the spring mandrel and the lower surface of the movable rod, the lower end of the tensioning rod comprising a tensioning head.
    In another aspect, the output device is installed in the head housing and includes a fork, an output shaft, a deep groove ball bearing, and a needle bearing, the deep groove ball bearing being attached to the housing. outer side of the top of the output shaft using circlips, the fork being installed on the outer side of a central portion of the output shaft, the needle bearing being installed on the outer side of the bottom of the output shaft; the output shaft.
    In another aspect, the output shaft has a hollow structure and is divided into an upper section, a middle section and a lower section, the diameter of the upper section of the output shaft being smaller than that of the central section. , the diameter of the central section being lower than that of the lower section, the outer side of the upper section of the output shaft being opposite a mounting slot circlips.
    In another aspect, the circlips are disposed at the upper and lower ends of the deep groove ball bearing, the deep groove ball bearing being connected by means of the circlips at its upper end to the output shaft and its bottom end to the head housing.
    In another aspect, an annular seal is installed in the gap between the head housing on the underside of the needle bearing and the output shaft.
    In another aspect, the structure further comprises a return limiting mechanism comprising a stopper, a pin and a torsion spring, the quick replacement lever being rotatably coupled to the top of the head housing, the upper portion of the housing of head comprising a stop housing, the rapid replacement lever being positioned entirely above the abutment housing, the abutment being rotatably coupled in the abutment housing by means of the pin, the torsion spring being fitted on a outer ring of the pin, one end of the torsion spring acting on the abutment housing, another end of the torsion spring acting on the abutment, a reset handle being disposed at one end of the abutment away from the pin.
    Advantageously, the torsion spring of this invention is used to allow rotation of the stop to a determined position of the head housing. In another aspect, three to five pieces of magnetic steel are disposed on the lower surface of the tool holder, these parts being uniformly distributed in the circumferential direction on the surface, the axis of the tool holder defining the center of the circumference.
    In another aspect, the stopper and reset handle form an integrated structure and a handle placement housing is formed in the abutment housing opposite the reset handle.
    In another aspect, two mounting holes of the pin facing each other are made at one end for which the stop is connected respectively with the pin and on both sides of the stop housing.
    Vis-à-vis the existing state of the art, the technical features of the invention have the following technical effects and advantages.
    The quick-change structure of the multi-function saw allows the removal and replacement of a saw blade by simply moving the quick-change lever on the top of the headbox, without using additional means, thus allowing easy handling and fast. When the quick-change lever returns to its original position, the back-limit mechanism provides an early return of the lever to the home position, thus providing a protective role for user safety.
    Brief description of the drawings
    Figure 1 is a schematic diagram of the rapid replacement structure of a multifunction saw according to a first embodiment of the invention.
    Figure 2 is a schematic diagram of the fast replacement structure of the multifunction saw before use according to the first embodiment.
    Fig. 3 is a schematic diagram of the fast replacement structure of the multi-function saw in use according to the first embodiment.
    FIG. 4 is a decomposition diagram of the fast replacement structure of the multifunctional saw according to the first embodiment.
    Fig. 5 is a schematic diagram of the output shaft of the first embodiment.
    FIG. 6 is a decomposition diagram of a feedback limitation mechanism according to a second embodiment of the invention.
    Figure 7 is a schematic diagram of the lower surface of a tool holder according to the second embodiment.
    Figure 8 is a schematic diagram of a first step of the second embodiment.
    Figure 9 is a schematic diagram of a second step of the second embodiment.
    Fig. 10 is a schematic diagram of a third step of the second embodiment.
    Fig. 11 is a schematic diagram of a fourth step of the second embodiment.
    Fig. 12 is a schematic diagram of a fifth step of the second embodiment.
    Fig. 13 is a schematic diagram of the quick replacement structure of the multi-function saw after assembling a saw according to the second embodiment.
    Notes of the annotations of the schematic diagrams: 1- rapid replacement lever, 2- eccentric block, 3- circlip, 4- pin, 5- head housing, 6-deep groove ball bearing, 7- compression spring, 8- fork, 9-needle bearing, 10- output shaft, 11- moving rod, 12- tool holder, 13-spring chuck, 14- tensioning rod, 15-ring seal, 16- saw blade, 18- snap ring mounting slot, 19- tensioning head, 20- stopper, 21- pin, 22- torsion spring, 23- magnetic steel, 24- stop housing, 25- reset handle, 26- zone protection.
    Detailed description of embodiments
    In order to further understand the contents of this invention, particular embodiments of the invention will be described with reference to the accompanying drawings. The embodiments described below are given by way of illustrative examples but do not limit the scope of the invention.
    First embodiment
    Referring to Figures 1-5, a quick-change structure of a multi-function saw includes a head housing 5, a tool holder 12, an output device, and a quick-change device. The output device comprises a fork 8, an output shaft 10, a deep groove ball bearing 6 and a needle bearing 9. The output shaft 10 is formed of a hollow cylindrical structure divided into an upper section, a central section and a lower section. The diameter of the upper section of the output shaft 10 is smaller than that of the central section, and the diameter of the central section of the output shaft 10 is smaller than that of the lower section. A mounting slot 18 of circlip 3 is formed in the outer wall of the upper section of the output shaft 10. The rapid replacement device comprises a rapid replacement lever 1, an eccentric block 2, a movable rod 11, a spring mandrel 13, a tension rod 14 and a compression spring 7.
    The top of the head box 5 is connected with the quick change lever 1 and the eccentric block 2 by means of a pin 4. The deep groove ball bearing 6, the fork 8 and the needle bearing 9 are arranged downwardly in a cavity on the inside of the head housing 5. The deep groove ball bearing 6 is connected with the inner surface of the head housing 5 by means of the circlips 3, while the upper sections, central and lower of the output shaft 10 are respectively connected with the inner sides of the deep groove ball bearing 6, the fork 8 and the needle bearing 9. The mounting slot 18 of the circlip 3 is disposed on the upper section of the output shaft 10, and the output shaft 10 is connected with the deep groove ball bearing 6 with the circlips 3 installed in the mounting slot 18. The internal diameters of the grooved ball bearing p 6 and the needle roller bearing 9 are respectively 0.1 to 0.3 mm larger than the outer diameters of the upper section and the lower section of the output shaft 10, so as to allow the positioning of the latter. .
    The fork 8 serves to adjust the rotational speed of the output shaft 10. A circular annular seal 15 is installed in the space between the head housing 5 on the underside of the needle bearing 9 and the output shaft 10. The output shaft 10 has a hollow structure. The movable rod 11 is disposed in the hollow position at the upper end of the output shaft 10. A circular orifice is formed at the lower end of the movable rod 11, and internal threads are formed in the orifice. External threads are made at the upper end of the tension rod 14 and are perfectly adapted to the internal threads of the orifice formed in the lower end of the movable rod 11, so that the movable rod presents a threaded connection with the tensioning rod 14. The spring mandrel 13 and the compression spring 7 are successively engaged on the outer side of the movable rod 11, the toolholder 12 is fixed to the bottom of the shaft 10, the upper end of the compression spring 7 butts against the lower surface of the movable rod 11, and the bottom of the compression spring 7 is supported by the upper surface of the tool holder 12. A bead is formed on the the outer side of the spring mandrel 13, and a downwardly sloping slope inwards is formed on the inner side of the tool holder 12 facing the spring mandrel 13. When the spring mandrel 13 moving downward touches the slope on the inner side of the tool holder 12, the spring chuck 13 can retract. A space T is reserved between the upper end of the spring mandrel 13 and the lower surface of the movable rod 11. A tensioning head 19 is disposed at the lower end of the tensioning rod 14.
    The operating principle of the fast replacement structure of the multifunction saw in this first embodiment is as follows.
    Step 1: With reference to Figure 1, the quick replacement lever 1 pivots with respect to the axis of rotation defined by the pin 4, so that the quick replacement lever 1 rotates the eccentric block 2.
    Step 2: With reference to Figure 2, the elasticity of the compression spring 7 being offset by the eccentricity, the eccentric block 2 pushes the movable rod 11 downwards, so as to drive the tension rod 14 to move downward on the distance T, bringing the upper end of the spring mandrel 13 into contact with the lower surface of the movable rod 11. The movable rod 11 then continues its downward movement so as to drive the mandrel to spring 13 downwards, bringing the bead to the lower end of the spring mandrel 13 in contact with the slope of the inner surface of the tool holder 12, causing a contraction and a decrease in the diameter of the lower portion of the spring mandrel 13 under the effect of pressure.
    Step 3: With reference to Figure 2, when the diameter of the lower end of the spring mandrel 13 is smaller than that of the mounting hole of a blade 16, the blade 16 is placed at the end of the mandrel spring 13.
    Step 4: Referring to Figure 3, the quick replacement lever 1 is pushed back to its initial position up the movable rod 11 which drives the tensioning rod 14 upwards under the effect of the compression spring 7. The tensioning head 19 of the tension rod 14 drives the spring mandrel 13 upwards, and the end of the spring mandrel 13 departs after the loss of pressure of the slope on the inner wall of the door 12. The blade is then fixed on the tool holder 12, a rapid replacement of the blade 16 is thus performed.
    Second embodiment
    Referring to Figures 6 to 13, a quick-change structure of a multi-function saw includes a head housing 5, a tool holder 12, an output device, a quick-change device, and a return limiting mechanism. The structure of the output device and the fast replacement device are similar to those of the first embodiment.
    The return limiting mechanism comprises an abutment 20, a pin 21 and a torsion spring 22. A quick replacement lever 1 is rotatably coupled to the top of the head housing 5, an abutment housing 24 is formed in the portion upper head housing 5 and the quick change lever 1 is entirely above the abutment housing 24.
    The abutment 20 is rotatably coupled in the abutment housing 24 by means of the pin 21, and the torsion spring 22 is fitted on an outer ring of the pin 21.
    One end of the torsion spring 22 acts on the abutment housing 24, while the other end of the torsion spring 22 acts on the abutment 20. Two mounting holes of the pin for installing the pin 21 are formed on both sides of the stop housing 24 at the top of the head housing 5, and a through mounting hole for the pin 21 is furthermore formed at one end of the abutment 20 facing the abutment housing 24. During the installation of the abutment 20 , the torsion spring 22 is engaged on the outer side of the pin 21, the pin 21 then penetrates successively through the mounting holes of the pin on both sides of the abutment housing 24 and in the stop 20. The stop 20 is articulated inside the abutment housing 24 and two extension sections of the torsion spring 22 are fixed on the lower surface of the abutment 20 and the lower surface of the abutment housing 24.
    The stop 20 may stretch automatically under the effect of the torsion spring 22 in the absence of stress. Since the quick change lever 1 can not return to its initial position unless a user withdraws the protection during the return process of the quick change lever 1 on its own initiative, a reset handle 25 is disposed on one end. of the abutment 20 described in this embodiment away from a rotation shaft, and is integrated with the abutment 20. A handle placement housing (not shown) is formed in the abutment housing 24, and the reset handle 25 is disposed in this housing when the stop is in a reset state. When the stop 20 is in the limit state, one end of the stop far removed from the pin 21 has a height greater than the upper surface of the head housing 5, and the lower surface of the reset handle 25 is clamped on. both sides of the stop housing 24. When the quick change lever 1 returns to its initial position, the reset handle 25 is matched with the stop 20, so as to form a protection zone 26 between the quick change lever 1 and the head housing 5.
    Referring to Figure 7, when the user needs to manually remove the guard during the protective removal process, three magnetic steel pieces 23 are further disposed on the lower surface of the tool holder 12 and are distributed thereon. surface uniformly in the circumferential direction, the axis of the tool holder 12 defining the center of the circumference. The magnetic steel 23 is used to temporarily draw the blade 16 so that the manual retention of the blade can be reduced and that the user can better make a quick change of the structure with his free hands.
    The operating principle of the return limitation mechanism is as follows:
    Step 1: Referring to Figure 8, the quick change lever 1 is rotated counterclockwise in the direction of the arrow, the stop 20 then pivots with the quick change lever 1 under the effect of the torsion spring 22. One end of the abutment 20 far away from the pin 21 protrudes upwardly until the reset handle 25 is recessed on both sides of the abutment housing 24, and at this time one end of the stop 20 remote from the pin 21 has a height greater than the height of the top of the head housing 5. The structure is illustrated in Figure 9.
    Step 2: At this time, the stop 20 stops rotating due to the stress of the top of the head housing 5, and the quick change lever 1 is still subject to counterclockwise rotation until it becomes parallel to the upper surface of the entire head housing 5. The spring mandrel 13 at the bottom of the tool holder 12 then protrudes, and the diameter of the spring mandrel 13 is reduced in extension so that the blade 16 of the saw can be installed on the spring mandrel 13, forming the structure shown in Figure 10.
    Step 3: At this moment the blade 16 is placed on the tool holder 12, and after the magnetic steel 23 on the tool holder 12 has attracted the blade 16, the user can withdraw his hands holding the blade 16. The blade 16 is then drawn towards the lower surface of the tool holder 12.
    Step 4: With reference to Figure 11, during the process of locking the blade 16, the quick change lever 1 is turned clockwise in the direction of the arrow. By turning to the position where the stop 20 is located, the rapid replacement lever 1 stops rotating under the constraint of the abutment 20, and a protection zone 26 is formed in a position between the quick replacement lever 1 and the housing 5. The position of the protection zone 26 is located at the hand of the user when the user manipulates the multi-function saw and thus plays a role of protection against the risk of bodily injury.
    Step 5: Referring to Figure 12, the reset handle 25 is pulled in the direction of the arrow to compress the torsion spring 22, so that the stopper 10 returns to its initial position. At this time the reset handle 25 is perfectly located in the handle placement housing. Meanwhile, the quick change lever 1 is pressed downward so that it can return to its initial position. The quick replacement lever 1 is then attached (generally a common fastening structure is made so that the quick change lever and the head housing 5 can be securely attached), the spring mandrel 13 returns to its position. initially, with an enlargement of its diameter, the blade 16 then being completely locked. The invention and its embodiments are described here for illustrative purposes, but the present description does not limit the scope of the invention. The appended figures show only certain embodiments of the invention, the structure of this invention not being limited to these embodiments. Thus, it will be understood by those skilled in the art that, subject to not departing from the spirit of the invention, similar structures and embodiments in accordance with the above-mentioned technical features are part of the scope of protection. of the present invention.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    A fast replacement structure of a multi-function saw comprising a head box (5), a tool holder (12) and an output device, the output device comprising an output shaft (10), this structure being characterized in that it further comprises a quick-change device, the quick-change device comprising a quick-change lever (1), an eccentric block (2), a movable rod (11), a spring-loaded mandrel (13). ), a tension rod (14), a compression spring (7), the quick change lever (1) and the eccentric block (2) being connected to the top of the head housing (5) by means of a pin (4), the movable rod (11) being installed in the output shaft (10), the upper end of the movable rod (11) being connected to the eccentric block (2), the lower end of the movable rod (11) being connected to the tension rod (14) by a thread, an outer side of the rod e being tensioned (14) being covered by the spring mandrel (13), an outer side of the spring mandrel (13) being covered by the compression spring (7), the upper end of the compression spring (7) being connected to the lower surface of the movable rod (11) and its upper end being connected to the upper surface of the tool holder (12), the tool holder (12) being arranged at the bottom of the output shaft (10). ), a slope narrowing downwardly inwardly being formed on the inner face of the tool holder (12), a bead facing the slope being formed on the outer surface of the spring mandrel (13), the structure further comprising a gap between the upper end of the spring mandrel (13) and the lower surface of the movable rod (11), the lower end of the tension rod (14) comprising a tensioning head .
    [2" id="c-fr-0002]
    2. Fast replacement structure of a multifunction saw according to claim 1, characterized in that the output device is installed in the head housing (5), the output device comprising a fork (8), an output shaft (10), a deep groove ball bearing (6) and a needle bearing (9), the deep groove ball bearing (6) being fixed on the outer side of the top of the output shaft (10) by means of circlips (3), the fork (8) being installed on the outer side of a central part of the output shaft (10), the needle bearing (9) being installed on the outer side of the output shaft (10). bottom of the output shaft (10).
    [3" id="c-fr-0003]
    3. Fast replacement structure of a multifunction saw according to claim 2, characterized in that the output shaft (10) has a hollow structure and is divided into an upper section, a central section and a lower section, the diameter the upper section of the output shaft (10) being smaller than that of the central section, the diameter of the central section being smaller than that of the lower section, the outer side of the upper section of the output shaft (10) being opposite a mounting slot (18) circlips (3).
    [4" id="c-fr-0004]
    4. Fast replacement structure of a multifunction saw according to claim 2, characterized in that the circlips (3) are arranged at the upper and lower ends of the deep groove ball bearing (6), the deep groove ball bearing (6) being connected by means of the circlips (3) at its upper end to the output shaft (10) and at its lower end to the head housing (5).
    [5" id="c-fr-0005]
    Fast replacement structure of a multi-function saw according to claim 2, characterized in that an annular seal (15) is installed in the space between the head housing (5) on the underside of the needle bearing ( 9) and the output shaft (10).
    [6" id="c-fr-0006]
    6. rapid replacement structure of a multifunction saw according to claim 1, characterized in that it further comprises a return limiting mechanism comprising a stop (20), a pin (21) and a torsion spring (22). , the quick change lever (1) being rotatably coupled to the top of the head housing (5), the upper portion of the head housing (5) including an abutment housing (24), the quick change lever (1) being positioned entirely above the abutment housing (24), the abutment (20) being rotatably coupled in the abutment housing (24) by means of the pin (21), the torsion spring (22) being fitted on an outer ring of the pin (21), one end of the torsion spring (22) acting on the abutment housing (24), another end of the torsion spring (22) acting on the abutment (20), a reset handle (25) being disposed at one end of the stop (20) away from the pin (21).
    [7" id="c-fr-0007]
    7. Fast replacement structure of a multifunction saw according to claim 6, characterized in that three to five magnetic steel pieces (23) are arranged on the lower surface of the tool holder (12), these parts being distributed over the uniformly circumferential surface, the axis of the tool holder (12) defining the center of the circumference.
    [8" id="c-fr-0008]
    8. Fast replacement structure of a multi-function saw according to claim 6, characterized in that the stop (20) and the reset handle (25) form an integrated structure, a handle placement housing being formed in the housing of stop (24) opposite the reset handle (25).
    [9" id="c-fr-0009]
    9. Fast replacement structure of a multifunction saw according to claim 6, characterized in that two mounting holes of the pin facing each other are formed at one end for which the stop (20) is connected. respectively with the pin (21) and on both sides of the stop housing (24).
    类似技术:
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    FR3037368A3|2016-12-16|LOCKING DEVICE WITH ADJUSTABLE POSITIONS OF THE LOCKING HANDWHEEL.
    EP1281480B1|2005-07-06|Clamping device
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    同族专利:
    公开号 | 公开日
    US20170291277A1|2017-10-12|
    DE202017100297U1|2017-02-10|
    FR3043350B3|2018-02-09|
    US10131032B2|2018-11-20|
    引用文献:
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    法律状态:
    2018-02-26| PLFP| Fee payment|Year of fee payment: 2 |
    2020-02-17| PLFP| Fee payment|Year of fee payment: 4 |
    2021-01-27| PLFP| Fee payment|Year of fee payment: 5 |
    2022-01-20| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201610221396.1A|CN105728846B|2016-04-11|2016-04-11|Multifunctional saw quick change construction and quick change method|
    CN201621078900.9U|CN206154243U|2016-09-26|2016-09-26|Quick change multifunctional sawing returns stop gear|
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