• 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 device (1) for the manual release of screw connections with a drive shaft (2) and an output element (3) which at least partially surrounds the drive shaft (2) and is rotatably mounted relative to the drive shaft (2). To provide a simple, compact, robust and cost-effective construction, a pulse transmission element (12) rotatably mounted relative to the drive shaft (2) is provided which is positively connected to the output element (3) in an inactive position, between drive shaft (2) and momentum transfer element (12) at least one spring element (14) is arranged, which is tensioned with rotation of the drive shaft (2) relative to the output element (3), so that upon release of the positive connection between the pulse transmission element (12) and the output element, an angular momentum to the output element (3 ) is transmitted.
    公开号:AT516676A1
    申请号:T50916/2014
    申请日:2014-12-17
    公开日:2016-07-15
    发明作者:
    申请人:Seibt Kristl & Co Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for the manual release of screw with a drive shaft and an output member which surrounds the drive shaft at least partially and is rotatably mounted relative to the drive shaft.
    Hard-releasing screw connections are usually opened by means of mechanical impact wrenches, which are operated either electrically or with compressed air. Applying continuous torque pulses, the screws are loaded jerky, with torque peaks, which are significantly higher than the statically applied torque, lead to loosening the screw. The disadvantage here is, on the one hand, the relatively high production costs associated with corresponding costs and, on the other hand, the necessity of drive energy in the form of compressed air or electric current, which clearly limits the portable application over longer periods of time.
    Furthermore, to solve difficult to loosen screwed han-term operable tools are known, which are placed on the screw head and are acted upon with a hammer in the direction of the screw axis with shocks. The axial impacts are converted via a helical toothing in the interior of the tool into angular momentum, which eventually lead to loosening the screw. A major disadvantage in this case are the impact-like axial loads on the component, which can lead to damage in sensitive components such as bearings or shafts.
    DE 1 503 043 A discloses a hand-operated tool for tightening or loosening screws or nuts, comprising an output shaft and a drum-shaped body having a spring unit and a rotating flywheel, the spring unit consisting of two intertwined parts, the respectively opposite points are connected to the drum-shaped body and the flywheel. The tool has lugs on which, for example, a reversible iron can be placed, and which are fixedly connected to a housing. The output shaft is connected via a socket with the festzuziehenden or to be solved mother. For tightening or loosening a screw the spring unit and the associated flywheel mass is biased by turning the turning iron, whereupon, after releasing a locking mechanism, the flywheel rotates due to the spring force and emits an angular momentum to the output shaft. DE 1 503 043 A has a number of disadvantages, including the relatively large dimensions of the tool, which severely limit the application, since the tool can only be applied to freely accessible locations. Another disadvantage is the relatively complex design with many items and a concomitant high production costs and the increased risk of defects. In addition, the output shaft is subjected to angular momentum, which, due to the relatively small power arm, to generate sufficiently high torque peaks, a relatively large flywheel with a correspondingly sized spring unit is necessary.
    Accordingly, the object of the invention is to provide a structurally simple, manually operated device for releasing difficult to release screw that requires no external energy. In addition, the device should preferably be compact, have low weight and be inexpensive to produce, so that it can be easily transported, and operated for example with a conventional socket wrench.
    According to the invention it is provided that a relative to the drive shaft rotatably mounted impulse transmission element is provided, which is positively connected in an inactive position with the output element, wherein between the drive shaft and impulse transmission element at least one spring element is arranged, which is stretched upon rotation of the drive shaft relative to the output element, so that upon release of the positive connection between the pulse transmission element and the drive element, an angular momentum is transmitted to the output element. By transmitting the angular momentum from the pulse transmission element to the output element, large torque peaks are achieved in a slim design of the device, which allow a simple and quick release of the stiff screw.
    It is advantageous if the momentum transfer element has at least one impact surface which cooperates with a counter surface of the output element for the purpose of impulsive impulse transmission. Through this interaction, a good power transmission can be ensured.
    It is preferably provided that the momentum transfer element and the output element each have two cooperating impact and counter surfaces. Preferably, the impact and counter surface are therefore rotated by approximately 180 ° to each other, so that the pulse transmission element can be rotated by approximately 180 ° and the spring element is tensioned accordingly before the pulse transmission element is released into an active position.
    In a preferred embodiment, in the inactive position, the pulse transmission element and the output element via at least one, preferably two, in particular pin-shaped (s), blocking element (s) are interconnected. Thus, a simple and easy to be solved positive connection between the pulse transmission element and output element can be produced.
    Advantageously, the drive shaft at least one, preferably two, cam (s) for transferring the at least one locking element in a non-locking position. The arrangement of the cam or the cams a Verklemmungsfreies displacement of the / the locking elements / elements is ensured upon rotation of the drive shaft.
    If the at least one cam interacts indirectly with the blocking element via a connecting element, in particular a connecting pin, the connecting pin can co-rotate with it in the active position of the pulse-transmitting element, whereas the blocking element remains in a release position.
    If one, preferably two, leg spring (s) is / are provided as the spring element, a compact and simple design can be achieved.
    In a preferred embodiment, the opposite end portions of the at least one leg spring are respectively received positively in a groove-shaped receptacle of the momentum transfer element and the drive shaft. As a result, transmission of the torque introduced by the drive shaft via the at least one leg spring to the pulse transmission element can be achieved.
    Advantageously, the momentum transfer element has two, preferably diametrically opposite arranged, percussion pieces, which are each connected via a leg spring to the drive shaft. Hiedruch results in a structurally simple construction, at the same time a rotatability of the pulse transmission element of about 180 ° is made possible before the pulse transmission element is transferred to an active position. As a hammer can e.g. a substantially cuboid metal body of high density can be used to produce a strong angular momentum.
    In a preferred variant, the output element has a hollow cylindrical part, in the interior of which at least one cam protrudes, which has a mating surface for the face of the momentum transfer element. As a result, a particularly compact design is achieved, wherein the at least one cam can also be easily manufactured, for example by milling. Through the interaction of hammer and mating surface good power transmission can be achieved on the output element.
    It is particularly advantageous if the output element has a parallelepiped-shaped projection preferably formed as an external square on one end face. This makes it possible to use the device in conjunction with conventional essays for socket wrench, which are plugged onto the rectangular projection.
    In addition, if the drive shaft on one end face, preferably in a final flange, a cuboid recess, preferably in the manner of a square socket, the device can be combined with conventional socket sets, wherein the device between the socket wrench, which is placed in the cuboid recess, and a top set, which is placed on the rectangular projection, is arranged.
    Advantageously, the drive shaft is passed through a passage opening in an end portion of the output element, wherein the end flange of the drive shaft is received in a corresponding recess of the end portion. By this arrangement, on the one hand a compact design can be achieved and on the other hand, a good guidance of the drive shaft is ensured in the output element.
    In a preferred embodiment, a cover plate having the cuboidal projection, a hollow cylindrical part and an end part accommodating the end flange of the drive shaft are connected inseparably to one another to form the output element, in particular welded. As a result, a simple manufacturing process is achieved because the three items can be made in a relatively simple manner. The inseparable connection creates a rigid and robust unit, which is also protected against the ingress of dirt and moisture from the outside.
    If the cover disc has a central recess for receiving an end portion of the drive shaft, a good axial and radial guidance of the drive shaft is ensured. In addition, a low-cost device is created by this simple construction and facilitates the assembly, which in turn can be accelerated, the entire manufacturing process.
    It is further advantageous if a circumferential groove for receiving a securing ring is provided on the inside of the recess of the end part. The arrangement of a locking ring ensures axial fixation of the drive shaft in the output element without restricting the rotational mobility and represents a simple and cost-effective solution.
    The invention will be explained in detail below with reference to a preferred embodiment, to which it is by no means limited. In the drawings show:
    Fig. 1 The device according to the invention in a perspective view;
    Fig. 2 device of Figure 1 in exploded view.
    Fig. 3a, the device of Figure 1 in plan view.
    FIG. 3b shows the device according to FIG. 1 in a sectional view along the line E-E in FIG. 2a; FIG.
    Fig. 4a device of Figure 1 in front view.
    Fig. 4b device of Figure 1 in a sectional view along the line A-A in Figure 3a in the starting position.
    Fig. 4c device of Figure 1 in a sectional view along the line A-A in Figure 3a with the spring tensioned.
    Fig. 4d device of Figure 1 in a sectional view along the line A-A in Figure 3a after releasing the locking pin ..; and
    Fig. 4e device of FIG. 1 in a sectional view along the line A-A in Fig. 3a in transmission of the angular momentum on the output element.
    As can be seen in Fig. 1, the device 1 to a drive shaft 2 which is rotatably mounted in an output member 3 and secured against axial displacement with a locking ring 4, which is arranged in a groove 5 provided for this purpose in the output element 3.
    In particular, it can be seen in FIG. 2 that the output element 3 has an end part 6, a hollow cylindrical part 7 and a cover plate 8, which are connected to each other inseparably, preferably welded, the end plate 8 being a central recess 10 for the axial and radial guidance of the Drive shaft 2 has. The drive shaft 2 has a closure flange 9, in which a cuboid recess 11 is arranged, for example, for receiving a conventional socket wrench.
    Furthermore, the device 1 has a pulse transmission element 12, which is composed of two striking pieces 13, and are rotatably mounted relative to the drive shaft 2 and at least one, preferably two spring element (s) 14 on rotation of the drive shaft 2 with respect to the driven element 3 can be stretched , In the inactive position, the momentum transfer element 12 or the striking pieces 13 are connected by means of pin-shaped locking elements 15 positively connected to the output element 3. Furthermore, on the drive shaft 2, one, preferably two, cam (s) 16 for transferring the at least one pin-shaped blocking element 15 into a non-blocking position is (are) arranged.
    As shown in Fig. 3A, a cuboid projection 17 is provided for receiving, for example, an attachment for conventional socket wrench on the outside of the cover plate 8. In the exemplary embodiment shown, the spring elements 14 are formed by leg springs 18, which enclose the drive shaft 2 and whose end sections are positively accommodated in a groove-shaped receptacle 19 in the drive shaft 2 and a groove-shaped receptacle 20 (see Fig. 2) in a momentum transfer element 12 , Upon rotation of the drive shaft 2, the cams 16 displace the connecting elements 21, which are arranged displaceably in the holes provided in the striking pieces 13. The connecting elements 21 correspond in turn to the also displaceably arranged pin-shaped locking elements 15th
    Fig. 4a shows the device 1 of FIG. 1 in front view and Fig. 4b is a sectional view taken along the line A-A in Fig. 4a. In Fig. 4b, the momentum transfer element 12 is shown in an intermediate position, wherein the striking pieces 13 are positively connected by the pin-shaped locking elements 15 with the hollow cylindrical part 7 of the driven element 3. By rotation of the drive shaft 2 in the counterclockwise direction (symbolized by arrow F in FIG. 4b) and relative to the output element 3, the leg springs 18 provided as spring element 14 begin to cock.
    In Fig. 4c, the momentum transfer element 12 is shown at the end of the (inactive) Verdrehbereichs, the spring elements 14 and preferably leg springs 18 are fully biased. The located on the drive shaft 2 cam 16 press in this position on the connecting elements 21, which in turn move the pin-shaped locking elements 15, whereby the positive connection of the hammer 13 is solved with the hollow cylindrical part 7 of the output element 3 and the hammer 13 are released. The displacement of connecting element 21 and pin-shaped blocking element 15 is symbolized by arrow G.
    In Fig. 4d, the momentum transfer element 12 is shown at the moment of impact on the mating surfaces 23 of the driven element 3. Previously, the hammer 13 rotatably mounted with respect to the drive shaft 2 was accelerated by the energy of the torsion springs 18 in the direction of rotation, as symbolized by arrow H, and move to the arranged inside the hollow cylindrical portion 7 of the driven element 3 projecting cam 22.
    Finally, it can be seen in Fig. 4e that the striking pieces 13, after they have reached the projecting cam 22 at the end of the rotational movement and the striking surfaces 24 of the striking pieces 13, as symbolized by arrow I, are impacted on the corresponding mating surfaces 23 of the projecting cam 22 , An angular momentum is transmitted to the output element 3, which can be introduced subsequently to a connected to the output element 3 screw connection. After the impact process, the striking pieces 13 can be rotated back into the starting position shown in Fig. 4b, where they are again connected by means of the pin-shaped locking elements 15 positively to the hollow cylindrical part 7 of the driven element 3. The process described with reference to FIGS. 4b to 4e can be repeated as often as desired until the stiff threaded connection is finally released.
    The device according to the invention is characterized by a simple, inexpensive and robust construction and allows a dog-like loosening of difficult to release screw without the use of external energy and without application of axial, possibly, component damaging, forces on the screw. Furthermore, the device according to the invention is characterized by its very compact design, whereby it can be easily transported and their handling is facilitated.
    权利要求:
    Claims (16)
    [1]
    claims
    1. Device (1) for the manual release of screw with a drive shaft (2) and an output member (3) which surrounds the drive shaft (2) at least partially and is rotatably mounted relative to the drive shaft (2), characterized in that one opposite the drive shaft (2) rotatably mounted momentum transfer element (12) is provided, which is positively connected in an inactive position with the output element (3), wherein between the drive shaft (2) and momentum transfer element (12) at least one spring element (14) is arranged upon rotation of the drive shaft (2) relative to the driven element (3) is tensioned, so that upon release of the positive connection between the pulse transmission element (12) and the output element, an angular momentum is transmitted to the output element (3).
    [2]
    2. Device (1) according to claim 1, characterized in that the pulse transmission element (12) has at least one impact surface (24) which cooperates for the purpose of impulsive impulse transmission with a counter-surface (23) of the output element (3).
    [3]
    3. Device (1) according to claim 2, characterized in that the pulse transmission element (12) and the output element (3) each have two cooperating impact (24) and counter surfaces (23).
    [4]
    4. Device (1) according to one of claims 1 to 3, characterized in that in the inactive position the pulse transmission element (12) and the output element (3) via at least one, preferably two, in particular pin-shaped (s), blocking element (e ) (15) are interconnected.
    [5]
    5. Device (1) according to claim 4, characterized in that the drive shaft (2) has at least one, preferably two, cam (s) (16) for transferring the at least one locking element (15) in a non-locking position.
    [6]
    6. Device (1) according to claim 5, characterized in that that the at least one cam (16) indirectly via each one connecting element (21), in particular a connecting pin, cooperates with the blocking element (15).
    [7]
    7. Device (1) according to one of claims 1 to 6, characterized in that as a spring element (14) one, preferably two, leg spring (s) (18) is provided or are.
    [8]
    8. Device (1) according to claim 7, characterized in that the opposite end portions of the at least one leg spring (18) in each case in a groove-shaped receptacle (20, 19) of the momentum transfer element (12) and the drive shaft (2) are positively received.
    [9]
    9. Device (1) according to claim 8, characterized in that the pulse transmission element (12) has two, preferably arranged diametrically opposite, striking pieces (13) which are each connected via a leg spring (18) to the drive shaft (2).
    [10]
    10. Device (1) according to one of claims 1 to 9, characterized in that the output element has a hollow cylindrical part (7), in the interior of which at least one cam (22) protrudes, which has a counter surface (23) for the striking surface (24 ) of the momentum transfer element (12).
    [11]
    11. Device (1) according to one of claims 1 to 10, characterized in that the output element (3) has a cuboid projection (17) on one end face.
    [12]
    12. Device (1) according to one of claims 1 to 11, characterized in that the drive shaft (2) on a front side, preferably in a final flange (9), a cuboid recess (11).
    [13]
    13. Device (1) according to claim 12, characterized in that the drive shaft (2) through a through hole in an end portion (6) of the output element (3) is passed, wherein the end flange (9) of the drive shaft (2) in a corresponding Recess of the end portion (6) is received.
    [14]
    14. Device (1) according to one of claims 11 to 13, characterized in that the cuboidal projection (17) having a cover disc (8), a hollow cylindrical part (7) and a the end flange (9) of the drive shaft (2) receiving End part (6) for forming the output element (3) inseparably connected to each other, in particular welded, are.
    [15]
    15. Device (1) according to claim 14, characterized in that the cover disc (8) has a central recess (10) for receiving an end portion of the drive shaft (2).
    [16]
    16. Device (1) according to any one of claims 13 to 15, characterized in that on the inside of the recess of the end part (6) has a circumferential groove (5) for receiving a securing ring (4) is provided.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3037213A1|2016-06-29|
    EP3037213B1|2018-03-21|
    AT516676B1|2017-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2317665A1|1973-04-05|1974-10-17|Hans Zillmer|DEVICE FOR RELEASING STUCK BOLTS OR NUTS, IN PARTICULAR STUCK WHEEL BOLTS OR WHEEL NUTS ON MOTOR VEHICLES AND TRAILERS|
    DE2543786A1|1974-10-02|1976-04-08|Atlas Copco Ab|ROTATION MECHANISM|
    SE525230C2|2001-04-28|2004-12-28|Rickard Andersson|Tool enables fixture component to be loosened or tightened with impulse force and has rotary component for rotation by hand force or other means|
    DE1503043A1|1962-04-25|1969-10-30|Swenson Oscar Joseph|Rotating impact tool|
    US4708209A|1985-08-12|1987-11-24|Aspinwall Hugh M|Manually operated impact driver|WO2021083679A1|2019-10-29|2021-05-06|Atlas Copco Industrial Technique Ab|Socket for a tightening tool|
    法律状态:
    2020-08-15| MM01| Lapse because of not paying annual fees|Effective date: 20191217 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50916/2014A|AT516676B1|2014-12-17|2014-12-17|Device for the manual release of screw connections|ATA50916/2014A| AT516676B1|2014-12-17|2014-12-17|Device for the manual release of screw connections|
    EP15200779.5A| EP3037213B1|2014-12-17|2015-12-17|Device for manually unscrewing screwed connections|
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