• 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:
    Pulley (1 ) with an improved pin, comprising: a hub (3) within which the external ring (11) of a rolling bearing (12) is keyed; a rotary support pin housed within the internal ring (13) of said bearing; protection labyrinths housed between the pin and the hub for the protection of the bearing; a circumferential groove (6) which is circumferential to the external diameter of the pulley (1 ) in which a shaped coating (7) is housed for the contact with the diamond wire (8); the hub of the pulley being made in two parts (9, 10) which are tightened in a stable way on the internal diameter of the pulley (1); moreover, it has each external face (18) of the hub provided with an annular labyrinth (17) which penetrates each other with an annular labyrinth (16) present on each internal face of a disassemblable pin (2) made in two parts (14, 15) and axially tightened by a releasable connecting member (19); and having the connection, between the improved pin (2) and the support (20) of the pulley (1 ), realized by means of tightening members (26) and guiding members (25), inserted in a direction parallel to the laying plane of the pulley, in the thickness of the walls (29, 30) of the support. Here described are specific advantageous embodiments of construction and mounting of the parts of the pin (2), of fixing of the improved pin to the support (20) and of external configuration of the pin (2), to facilitate the interlocking between pulleys and wires in the multi-wire machine for cutting blocks of stone.
    公开号:ES2650452A2
    申请号:ES201790022
    申请日:2015-11-02
    公开日:2018-01-18
    发明作者:Giambattista PEDRINI；Sergio BARAGETTI
    申请人:Pedrini SpA Ad Unico；
    IPC主号:
    专利说明:

    DESCRIPTION

    Pulley with improved pin to support threads for multi-threaded stone block cutting machine.
     5
    Field of the Invention

    The invention relates to: a pulley with an improved pin to support diamond wires, that is, an improved pin of a pulley used in machines that cut with a multitude of diamond wires, which slide in a known manner over a stone block. for cutting into slabs, said cutting being simultaneous of all or part of the block, and comprising a new single pulley mounting pin to support and / or return the closed wires in a ring. The new pin is advantageously used in the specific tensioning device of the multitude of threads associated with the multi-thread cutting machine, in only one way for each thread. fifteen

    Prior art

    The prior art comprises several types of machines for cutting stone blocks with multiple diamond wires, where the wires closed in a ring, with an identical or very similar development, are subtended between pulleys and / or drums that provide support, rotation , that is to say, the transmission of the cutting movement of the diamond wire in the block, as well as the tension to the preset value, in such a way that sufficiently precise flat surfaces of the slabs cut in this way are made. 25

    The rotation movement is transmitted to the multitude of threads by means of a drum with added grooves, advantageously coated or made of rubber or a non-metallic material, since the diamond wire, which has the diamond inserts anchored in the thread and separated between yes, it has a winding in the grooves with the support of the inserts and partially of the thread, in such a way that the transmission of the tangential force and the limit wear due to the contact of the diamond inserts with the respective groove is carried out.

    As mentioned, the tensioning of each ring is produced, in the prior art, by
    by means of adjusting the position of the pulleys, or the recoil drum, subdivided for this purpose into individual pulleys, separated from each other by the distance at which the diamond wires must work, to cut the slabs of the required thickness. Tensioning devices of the diamond wires are known, in which the tensioning pulleys, which operate on alternating threads of the recoil or return branches in the annular path, act radially, pushing or pulling, on the single thread of such so that all threads are tensioned. In this case, however, the devices act on at least two different branches or points in the path of the threads.
     10
    In fact, the different performances and / or stretching of the diamond wire with the use and aging force the tensioning for each single wire, so that a similar tension is made -if not identical- in the different threads that work from side by side in the cutting of the slabs of the block of natural stone.
     fifteen
    In addition, the tension made with the pulleys in the recoil or return branches requires the use of pulleys or wheels that do not have a large diameter, to avoid very large dimensions of the machine, but not so small that the winding of the wire over they harm the life and duration of the thread itself. The diamond wire needs drums, wheels or pulleys that have equal diameters or 20 greater than one meter to have an acceptable half-life. In fact, the steel wire that supports the diamond inserts bends every time it goes into flexion with a wheel, pulley or drum and with it it makes an arc of rotation - although short.

    The pulleys known in the tensioning devices have the support pins that require a complete disassembly of the single pulley support to support or return the diamond wire, so that the bearing housed therein is replaced. The disassembly of the support, when it is part of a complex tensioning device, requires time, thus damaging the maintenance of the multithreaded cutting machine as a whole, since the machine is normally equipped with a large number of 30 diamond wires which, in the cut, subdivide a stone block into slabs of the desired thickness.

    Therefore, support, tension and rotation devices are known in the prior art, which are complex, that is, they are constituted by a large number of
    parts, which have a high cost and / or a high maintenance cost, which also include the time required for the assembly and disassembly of the parts of the devices: both in ordinary maintenance, such as in the replacement of thread rings diamond, as in extraordinary maintenance, such as the replacement or repair of parts of the device. The replacement of the bearings of the tensioning pulleys or of the non-metallic material that serves to cover the grooves of the pulleys, on the wheel or the drum to transmit the cutting movement are the most expensive maintenance operations.

    On the other hand, the cost of execution and maintenance factor influences the options 10 of customers and users. Taking into account that these multi-threaded cutting machines are intended for almost continuous work, the incidence of maintenance costs, such as labor and spare parts, is preponderant in the purchase choice.
     fifteen
    In addition, the realization of a multi-wire machine for cutting stone blocks, which has low construction costs and low maintenance costs, is a technical problem that cannot be easily solved by the solutions known in the prior art, therefore, It is desired to carry out a multi-threaded machine that combines both the construction economy, the maintenance economy and that also allows the maximum use of the life of the diamond cutting wires and has not been carried out in the art yet. This problem relates mainly to the support and / or tension elements of the diamond wire rings, which are more subject to wear due to the continuous sliding of the diamond wire on them and involves the position and constitution of the tensioning elements.

    Said state of the art is susceptible to significant improvements with respect to the possibility of overcoming the drawbacks described above and of making a rotation pin for pulleys to support or tension a single diamond wire with the profitability characteristics intrinsically associated with its constitution.

    Therefore, the technical problem, which forms the basis of the present invention, is to make a pin of a pulley to support or tension a diamond wire in a machine for cutting stone blocks with a multitude of diamond wires 35
    closed in a ring, characterized by the profitability of the construction, always maintaining simplicity of maintenance and profitability in the life of the machine, so that maintenance interventions are reduced to short stops of the machine.
     5
    A further and additional objective of the present invention is to shape the pulley pin in such a way that it reduces the overall dimensions of the pin even if it is used in groups of adjacent pulleys and threads that intersect the pulleys of the tensioning device of the ring rings. diamond wire, which affects the position that the pins can assume in operation. 10

    Finally, another part of the technical problem that has been mentioned above refers to the possibility of being able to intervene on the single pulley in a group of pulleys, which is used for tensioning, without disassembling the pulleys or pulley supports or pins of the tensioner pulleys that are adjacent to the pulley that needs maintenance.

    Summary of the Invention

    This technical problem is solved, according to the present invention, by a pulley with an improved pin, comprising: a bushing into which the outer ring of a bearing is embedded; a rotating support pin housed within the inner ring of said bearing; protection mazes housed between the pin and the bushing for bearing protection; a circumferential groove to the outer diameter of the pulley housing a shaped liner for contact with the diamond wire 25; the pulley bushing being manufactured in two parts stably pressed on the inner diameter of the pulley; furthermore, each outer face of the bushing is provided with an annular maze that penetrates each other with an annular maze present on each inner face of a detachable pin made in two parts and axially tightened by a releasable connecting element; characterized in that it has the connection between the improved pin and the pulley support, made by means of clamping elements and guiding elements, inserted in a direction parallel to the plane of the pulley, in the thickness of the walls of the pulley itself. support.

    In addition, in an improved embodiment: the pulley bushing has both parts 35
    symmetrical, which constitute two bushing halves.

    In addition, in a preferred embodiment: the pulley pin has two symmetrical parts, which constitute two halves of the improved pin and the releasable connection includes a screw. 5

    In addition, in a further embodiment: the guide elements of the improved pin in the support comprise a seat and inclined planes to guide in the positioning the pin part on the pulley support.
     10
    In addition, in a preferred embodiment: the connection elements for connecting the improved pin to the support comprise reduced male hex head screws.

    Furthermore, in a specific embodiment: a pin and pulley seat in the support also comprises a fixing pin and threaded holes.

    In addition, an improved embodiment provides: a fixing element and threaded holes made on an intermediate element added in the support and which becomes replaceable if necessary. twenty

    In addition, in a variant of a preferred embodiment: the improved pulley pin is made with a width slightly greater than the thickness of the single pulley bushing, such that it allows penetration of the cross-linked diamond wire between the groups. of pulleys and the corresponding strands in tension in a multi-thread cutting machine, up to the spatial position reached by the pin in the tensioning movement.

    Furthermore, in an improved embodiment: the limitation of the pin thickness only partially affects the improved pin, which has inclined recesses on its outer faces.

    Finally, in a specific embodiment: the attachment of the intermediate element added is done with screws in the pulley support.
     35
    The characteristics and advantages of the present invention, in the realization of a pulley with an improved pin to support diamond wires, are mentioned in the following description of a support with an improved pin of a pulley for a multi-wire cutting machine in which the positive tensioner of the threads subject to lengthening in the cutting of the stone block, advantageously utilizes the improved pulleys 5; These characteristics and advantages are given as a non-exhaustive example, with reference to the five drawing tables attached.

    Brief description of the drawings
     10
    Figure 1 is a schematic side view of a pulley for a multi-thread cutting machine described in the invention, comprising the improved pin and the pin holder, which is used in the tensioning means of the diamond wire rings;
    Figure 2 is a schematic view in diametral section referring to the pulley of Figure 1, in the embodiment used in a tensioning device of a multi-threaded machine;
    Figure 3 is an enlarged schematic view in diametral section of the improved pin, with reference III of Figure 2;
    Figure 4 is a schematic perspective view of the pulley with pin and support of Figure 1;
    Figure 5 is a schematic perspective and partial view of a tensioning device with the fine tensioning pulleys of each thread, subdivided into two groups of threads and pulleys, interposed with each other and with the diamond wires of the multi-threaded machine in the two groups of tension wires; 25
    Figure 6 is a schematic side view of the improved pin holder in the tensioning device, of a pulley with the improved pin of the invention;
    Figure 7 is a schematic and exploded perspective representation of a pulley with an improved pin according to the invention.
     30
    Detailed description of a preferred embodiment

    In figures 1, 2 and 3 a pulley 1 can be seen which is provided with an improved pin 2 inserted to support the pulley bushing 3, which is added on the axis of rotation of the pulley and tightened with screws 4; the disc 5 of the pulley is equipped, in 35
    the outer diameter, of a circumferential groove 6 within which a shaped coating 7, of soft material, is placed to contact the highly abrasive diamond wire 8. The pulley has the bushing 3 made in two parts, advantageously in two symmetrical parts, that is, two halves 9 and 10, which are tightened together with the screws 4, to support the disk 5 of the pulley 1 on the outer ring 11 of a bearing 12, which in turn is housed in the pin 2 with its inner ring 13. Pin 2 is also subdivided into two parts, advantageously two symmetrical parts, that is, two halves 14 and 15, and has annular mazes 16 that penetrate each other with corresponding annular mazes 17 present in the outer surfaces 18 of the two halves of the pulley bushing 2; an axial screw 10 with a nut tightens the two halves of the bushing, making the support pin of the inner ring 13 of the bearing 12, which constitutes the pin 2.

    The pin 2 with the two halves is connected and tightened to the support 20 of the pulley, here generically shown, when the two halves are mounted complete 15 with the pulley 1 on the support, as can be seen in the following figures 4, 5 and 6. The pin 2, complete and mounted on the pulley, is housed in situ on the two respective seats 21 of the support, by the guide of the inclined planes 22 and 23 present on the sides of the pin 2 and laterally to the support plane 24 , as well as by the guide of a fixing pin 25, to constitute guiding elements, and 20 tightened with screws 26, to constitute clamping elements in the support in a direction parallel to the plane of the pulley, two screws in each half 14 , 15 of the pin, in engagement in the threaded holes 27, which are made, in a very advantageous manner, added with an intermediate element 28 housed and tightened to the support plane 24 in the respective wall 29 or 30 of the support 20 and h to the corresponding half 25 14 or 15 of the rotation pin 2 of the pulley 1. The intermediate element 28, in case of damage to the threaded holes 27, can be replaced by acting on the fixing screws 31.

    Finally, as can be seen in the figures, each half 14 or 15 of the support pin 30 of the pulley 1 has inclined recesses on its outer surface 32 to allow possible positioning of the diamond wire 8 near the pin 2 of the pulley 1. This last condition occurs, as can be seen in Figure 5, with the pulleys 1 and relative rotation supports that are placed very close to the diamond wires 8 in the multi-threaded machine for cutting stone blocks. In fact, 35
    with the pulleys 1 and the relative pins 2 and the brackets 20 inserted in a tensioning device of the diamond wire rings, with the penetration between the pulleys, which are divided into groups interposed with each other and interposed with the threads of the other group; the threads close to said pins 2 are interposed with the pulleys 1 as shown in figure 5 to slide the thread 8 also near the pin 2 of 5 a pulley of the other group of threads, in the position of maximum penetration between the pulleys 1 and the threads 8. Therefore, the threads 8 can also slide freely near the pin 2, because it has the inclined recesses 32, on both sides, so that it facilitates the passage of the thread 8 also in correspondence with said pin of the pulley in the narrow spaces present between the adjacent threads and the 10 pulleys of a tensioning group of the diamond wires closed in a ring.

    The assembly of the improved pulley pin, according to the invention, occurs as described below.
     fifteen
    Each pulley has the hub 3 with the two halves 9 and 10, which are tightened with the screws 4 on the outer ring 11 of the bearing 12. On the outer surface 18 of the two halves are the annular grooves 17 of a protective maze of the bearing. Correspondingly, on the inner surface of the two halves 14 and 15 of the pin 2, there are concentric annular grooves 16 with penetration 20 with the grooves 17 of the bushing 3 to close the labyrinth on both sides of the bushing. A screw 19 with a nut closes the two halves of the pin 2 in the inner ring 13 of the bearing 12, so that the pulley assembly 1 with the pin 2 is ready for direct use on the support 20 of the machine.
     25
    The assembly, or disassembly, of the pulley unit 1 and pin 2 is carried out by means of the seating of the seats 21 present in the two halves 14 and 15 of the pin 2 against the plane 24 of the pulley support provided in The multi-thread cutting machine. The centering of each pin 2 and, therefore, of the pulley 1, is produced with the guide of the inclined planes 22 and 23, which are lateral with respect to the seat 21 30 of each part of the pin 2. The centering is also favored by a fixing element 25, which in the figures consists of a pin inserted in the seat 21 and in said plane 24 to align the threaded holes 27 with the fixing screws 26 of each half 14 or 15 of the pin 2 in the support 20 of the pulley. In disassembly, the screws 26 are advantageously made with a reduced hexagonal head 35
    male with respect to the standard dimension corresponding to the thread used: this arrangement allows the use of a thread with a suitable tightening capacity for the pulley pin requirements, but limits the overall dimensions of the screw handling elements 26, typically a wrench of tube, considering that the support 20 is used in groups of adjacent pulleys with a minimum space 5 available for maintenance interventions. A reduction in the accessibility dimensions necessary for maintenance intervention keys prevents the disassembly of adjacent pulleys from those in which maintenance must be performed.
     10
    The operation of the improved pin described above 2 allows to correctly guide the pulley 1 with a bearing 12 with dimensions suitable for the tensions and for the duration necessary for the type of machine, that is, with continuous use in the working period, whereas these multi-thread cutting machines are profitable if they can work both day and night. fifteen

    Furthermore, in the specific constitution of the pin 2, which on the outer surface of the two halves 14 and 15 has the inclined recesses 32, in the movement of the pulleys of a tensioning device, the pulleys 1 themselves can have final positions, in the Penetration with each other with the threads 8 of other pulleys, which is large, as shown in Figure 5.

    The advantages of the pulley with an improved pin, when mounted in a multi-threaded machine for cutting stone blocks, can be summed up in the simplicity of assembly-disassembly of pin 2 of bushing 3 of pulley 1. Also in the presence of this simplicity, the bearing 12 is protected by penetration between the labyrinths 16 and 17 present in the parts 9 and 10 of the bushing 3, and in the parts 14 and 15 of the pin 2, and easily accessible for maintenance only by disassembling the screw 19 with the nut.
     30
    In addition, also the way to fix the pin 2, with the pulley 1, on the support 20, either fixed, for pulleys with a fixed position, or mobile, for movable or sliding movable pulleys, is advantageous because it is carried out in parallel to the pulley itself and in a space that occupies no more than the space occupied by the support itself 20. That is, the way to fix the pin 2 reduces maintenance operations 35
    preparatory that do not require intervention on collateral elements or adjacent to the pulley that needs maintenance.

    Finally, the configuration with the inclined recesses 32 in the parts 14 and 15 of the hub 2 allows a greater and safer spatial penetration of the pulleys of 5 a group of mobile pulleys, for the tensioning of the diamond wires closed in a ring , typical of multi-thread cutting machines, with pulleys, and in particular, with the threads of the other group when said cutting threads are alternately subdivided into even threads in one group and in odd threads in the other group of tension pulleys. 10

    Obviously, in the realization of a pulley with an improved pin to support diamond wires, as described above, a person skilled in the art can apply the characteristics described with the variants he deems appropriate, but all included in the appended claims. Therefore, although at least 15 advantageously, the support 20 of the pulley unit 1 and improved pin 2 can be fixed to the multi-thread cutting machine or they can move in sliding or oscillation. In addition, the subdivision of the hub 3 into two parts can be done with non-symmetrical parts, just as the subdivision of the improved pin 2 can occur with non-symmetrical parts. twenty
    权利要求:
    Claims (10)
    [1]

    1. Pulley (1) with improved pin to support threads for multi-thread cutting machine of stone blocks, characterized in that it comprises: a bushing (3) into which the outer ring (11) of a bearing (12) is embedded; a rotating support pin 5 housed inside the inner ring (13) of said bearing; protection mazes housed between the pin and the bushing for bearing protection; a circumferential groove (6) that is circumferential to the outer diameter of the pulley (1) in which a shaped liner (7) for contact with the diamond wire (8) is housed; the pulley bushing being manufactured in two parts (9, 10) pressed 10 stably on the inner diameter of the pulley (1); in addition, it has each outer face (18) of the bushing provided with an annular maze (17) that penetrates each other with an annular maze (16) present on each inner face of a detachable pin (2) made in two parts (14, 15 ) and axially tightened by a releasable connection element (19); characterized in that it has the connection between the improved pin (2) and 15 the support (20) of the pulley (1) made by means of clamping elements (26) and guiding elements (25) inserted, in a direction parallel to the plane of Pulley placement, in the thickness of the walls (29, 30) of the support itself.

    [2]
    2. Pulley with improved pin to support threads for cutting machine 20 multi-strand of stone blocks, according to claim 1, characterized in that the bushing (3) of the pulley (1) has the two symmetrical parts, which constitute two bushing halves (9, 10).

    [3]
    3. Pulley with improved pin to support threads for cutting machine 25 multi-strand of stone blocks, according to claim 1, characterized in that the pin (2) of the pulley (1) has the two symmetrical parts that constitute two halves (14, 15) of the improved pin and in which the removable connection comprises a screw (19).
     30
    [4]
    4. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to claim 1, characterized in that the guide elements of the improved pin in the support (20) comprise a seat (21) and planes inclined (22, 23) to guide the positioning of the pin part on the pulley support. 35

    [5]
    5. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to one of the preceding claims, characterized in that the connecting elements for connecting the improved pin (2) to the support (20) comprise screws (26) with a hexagonal head reduced 5 male.

    [6]
    6. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to claim 4, characterized in that a seat (21) of the pin (2) and of the pulley (1) on the support ( 20) also includes a fixing pin (25) and threaded holes (27).

    [7]
    7. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to claim 6, characterized in that a fixing element (25) and threaded holes (27) are made on an intermediate element (28) added on the support (20), and that is replaceable if necessary.

    [8]
    8. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to one of the preceding claims, characterized in that the improved pin (2) of the pulley (1) is made with a slightly wider width that the thickness of the bushing (3) of the single pulley, in such a way as to allow the penetration of the cross-linked diamond wire (8) between groups of pulleys and the corresponding threads in the tensioning in a multi-thread cutting machine, to the position space reached by the pin (2) in the tensioning movement.

    [9]
    9. Pulley with improved pin to support threads for multi-thread cutting machine of stone blocks, according to claim 8, characterized in that the limitation of the thickness of the pin (2) only partially affects the improved pin, which has about inclined recesses (32) on their outer faces.

    [10]
    10. Pulley with improved pin to support threads for multi-threaded stone block cutting machine, according to claim 7, characterized by
    that the fixation of the added intermediate element (28) is done with screws (31) in the support (20) of the pulley.
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    同族专利:
    公开号 | 公开日
    CN107107381B|2019-05-17|
    ES2650452B1|2019-01-29|
    CN107107381A|2017-08-29|
    BR112017008792A2|2018-01-30|
    WO2016071937A1|2016-05-12|
    ES2650452R1|2018-04-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    IT1250280B|1991-08-06|1995-04-07|Skf Ind Spa|TENSIONER DEVICE WITH ROLLING BEARINGS|
    ITVI20070184A1|2007-06-27|2008-12-28|Simec Spa|PULLEY FOR MULTIFILIAN TOOL MACHINES.|
    ITMO20080039A1|2007-09-28|2009-03-29|Luigi Pedrini|SUPPORT, GUIDE AND / OR TRANSMISSION OF THE MOTORCYCLE TO THE DIAMOND STONE CUTTING WIRE|
    WO2011033542A1|2009-09-21|2011-03-24|Pelmine S.R.L.|Tensioning device for machines for multiple wire cutting of stone material|
    WO2012143956A1|2011-04-19|2012-10-26|Pelmine S.R.L.|Machine for multiple wire cutting of stone material|CN106493628A|2016-11-13|2017-03-15|陈红玲|Abrasive wire sawing equipment guide wheel|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ITMO20140318|2014-11-03|
    ITMO2014A000318|2014-11-03|
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