Wire cable copper wire stranding machine

Abstract

The invention discloses an electric wire and cable copper wire stranding machine, and belongs to the technical field of copper wire stranding, the electric wire and cable copper wire stranding machine comprises a rack, a winding mechanism used for winding a stranded copper wire is assembled on the rack, a material rack unit is assembled on one side, far away from the winding mechanism, of the rack, the material rack unit comprises a shaft rod installed in a first bearing seat, and an installation disc is assembled on the shaft rod; a material frame is inserted into the mounting disc by forming an inserting groove, and a driving piece is assembled at one end of the shaft rod; through the arrangement of the anti-loosening unit and the stranded wire guide frame, the rotating pay-off barrel drives the extending frame through the moving unit to push the rolling shaft to be attached to a copper wire in real time in the stranding process, so that no matter what degree the pay-off is achieved, the rolling shaft can always apply tension to the wire outlet end of the copper wire, the copper wire is kept in tension, and the copper wire is prevented from being loosened. The stranding machine is simple in structure and convenient to use, the loosening condition along with the increase of the paying-off time is avoided, the loosening condition of the stranded wire is avoided, the quality of the stranded wire is ensured, and the risk of increasing the fault of the stranding machine is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of copper wire stranding, in particular to a copper wire stranding machine for electric wires and cables. Background Art

[0002] A stranding machine is a type of mechanical equipment that can be widely used to twist various soft / hard conductor wires. It twists multiple single conductors into one strand to meet the process requirements of the wire. According to the stranding method, stranding machines can generally be divided into single stranding machines, pair stranding machines, high-speed stranding machines, back-twist machines, cage stranding machines, frame stranding machines, tubular stranding machines, and disc stranding machines.

[0003] In the operation process of the copper wire stranding machine, the wire pay-off link is crucial. As the copper wire reel continues to pay out the wire, the copper wire will gradually become loose instead of remaining straight. This change will directly affect the tight winding of the copper wire during the stranding process, resulting in loose strands. Loose strands are not only unsightly in appearance, but may also weaken their electrical and mechanical properties. In addition, since the copper wire is in an unstable state during the stranding process, it may also cause fluctuations in the stranding quality and even increase the risk of stranding machine failure. Summary of the Invention

[0004] The purpose of the present invention is to propose a wire and cable copper wire stranding machine in order to solve the problem that the copper wire is in a relaxed state, which affects the tight winding of the copper wire during the stranding process and causes the stranded wire to become loose.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a wire and cable copper wire stranding machine, comprising a frame, the frame being equipped with a winding mechanism for winding the copper wire after stranding, the frame being equipped with a material rack unit on a side away from the winding mechanism, the material rack unit comprising a shaft mounted in a first bearing seat, the shaft being equipped with a mounting plate, the mounting plate being provided with a material rack inserted through a slot, and one end of the shaft being equipped with a driving member;

[0006] The material rack is equipped with an anti-loosening wire unit, which includes a bracket fixed on the mounting plate, an extension frame is plugged into the bracket through a retaining tube, and the extension frame is rotatably connected to a rolling shaft on the side close to the material rack, and a moving unit is commonly equipped at both ends of the material rack;

[0007] The other end of the shaft is equipped with a stranding unit. The material rack and the stranding unit pay out the strands driven by the driving member. When the material rack rotates, the moving unit causes the rolling shaft to press against the copper wire in real time, so that the copper wire maintains tension during the pay-out process.

[0008] As a further description of the above technical solution:

[0009] The material rack includes a lower plug-in plate and an upper plug-in plate inserted in the slot, and a second bearing seat is fixed on both the lower plug-in plate and the upper plug-in plate. A wire reel with copper wire wrapped around the surface is inserted into the two second bearing seats.

[0010] As a further description of the above technical solution:

[0011] The mobile unit includes two third bearing seats respectively fixed on the lower insert plate and the upper insert plate, and a vertical shaft is detachably fixed in the inner ring of the bearing of the third bearing seat;

[0012] Both ends of the wire reel are provided with sockets matched with the vertical shaft, and one end of the vertical shaft is plugged into the socket.

[0013] As a further description of the above technical solution:

[0014] A fourth bearing seat is fixed to one side of the surface of the lower insert plate and the upper insert plate close to the third bearing seat, as well as one side of the surface of the two retaining tubes. The fourth bearing seats are evenly divided into two groups. A threaded rod is detachably fixed in the inner ring of the bearing of each group of the fourth bearing seats. A bevel gear is fixed to one end of the threaded rod and the vertical shaft, and the two bevel gears are meshed with each other.

[0015] As a further description of the above technical solution:

[0016] An internal threaded part is provided on the threaded sleeve of the threaded rod, and mounting rods are fixed on the outer walls of the two internal threaded parts. One end of the two mounting rods is detachably fixed with a sliding frame slidably connected to the retaining tube.

[0017] As a further description of the above technical solution:

[0018] One end of the extension frame extending into the holding tube is connected to a moving block via a spring. The top and bottom of the moving block are fixed with connecting blocks. The connecting blocks pass through one end of the holding tube and are fixed to the sliding frame.

[0019] As a further description of the above technical solution:

[0020] The stranding unit includes a mounting base fixed on the frame, a threading disc is rotatably connected to the mounting base through a roller bearing, the threading disc is fixed to the other end of the shaft, a plurality of threading holes are opened on the threading disc, a stranded wire guide rack is installed on one side of the threading disc, and a stranded wire outlet rack is installed on the other side of the threading disc;

[0021] A plurality of middle guide balls are embedded in the threading hole, and the middle guide balls are arranged in an hourglass shape.

[0022] As a further description of the above technical solution:

[0023] The stranded wire conductor rack comprises a support frame fixed on a threading disk, a conical frame is fixed to the bottom of the support frame, and a plurality of front guide balls are rotatably connected to the conical frame through a circular ring.

[0024] As a further description of the above technical solution:

[0025] The stranded wire outlet frame comprises a connecting frame fixed on the threading disk, an outlet pipe is fixed on one end of the connecting frame, and a plurality of rear guide balls are embedded on the inner wall of the outlet pipe.

[0026] As a further description of the above technical solution:

[0027] The driving member includes a motor fixed in the frame, an output end of the motor and one end of the shaft are both fixed with pulleys, and a transmission belt is engaged with the two pulleys.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] By setting up the anti-loose wire unit and the stranded wire conductor frame, the pay-off drum that rotates during the stranding process drives the extension frame through the mobile unit to push the rolling shaft to fit the copper wire in real time, so that no matter how much the wire is paid out, the rolling shaft can always apply tension to the outlet end of the copper wire to keep the tension of the copper wire, avoiding relaxation as the pay-off time increases, and thus avoiding loose strands, thereby ensuring the quality of the stranded wire and avoiding the risk of increasing the malfunction of the stranding machine. At the same time, by maintaining the stable tension of the copper wire during the stranding process, the problems of loose strands and unsightly appearance are avoided, and it also helps to improve the electrical and mechanical properties of the stranded wire.

[0030] At the same time, during the wire laying process, the stranded wire rack can guide the turning angle of the copper wire, making the bending angle of the copper wire smoother, reducing the friction between the copper wire and the wire hole, and thus reducing the risk of the copper wire being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a three-dimensional structure provided in an embodiment of the present invention is shown;

[0032] Figure 2 It shows a schematic structural diagram of an installation disk provided according to an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the disassembly structure of a material rack according to an embodiment of the present invention is shown;

[0034] Figure 4 A schematic diagram of a disassembled structure of a mobile unit provided in an embodiment of the present invention is shown;

[0035] Figure 5The embodiment of the present invention provides Figure 4 Enlarged view of point A in the middle;

[0036] Figure 6 It shows a schematic structural diagram of a partially cutaway threading tray provided in accordance with an embodiment of the present invention;

[0037] Figure 7 A schematic structural diagram of a stranded wire conductor rack provided in an embodiment of the present invention is shown;

[0038] Figure 8 The embodiment of the present invention provides Figure 6 Enlarged view of point B in the middle;

[0039] Figure 9 The figure shows a schematic diagram of the internal structure of a partially cut-away frame according to an embodiment of the present invention.

[0040] Legend:

[0041] 10. Rack;

[0042] 20. Rewinding mechanism;

[0043] 30. Material rack unit; 31. First bearing seat; 32. Mounting plate; 33. Material rack; 331. Lower insert plate; 332. Upper insert plate; 333. Second bearing seat; 334. Pay-off drum; 34. Shaft; 35. Motor; 36. Drive belt;

[0044] 40. Anti-loosening wire unit; 41. Bracket; 42. Holding tube; 43. Extension frame; 44. Rolling shaft; 45. Moving unit; 451. Vertical shaft; 452. Threaded rod; 453. Bevel gear; 454. Internal threaded member; 455. Sliding frame; 456. Spring; 457. Moving block;

[0045] 50. Wire stranding unit; 51. Mounting seat; 52. Wire threading drum; 53. Wire threading hole; 54. Wire stranding conductor rack; 541. Support frame; 542. Conical frame; 543. Ring; 544. Front guide ball; 55. Wire stranding outlet rack; 551. Connecting frame; 552. Wire outlet tube; 553. Rear guide ball; 56. Middle guide ball. DETAILED DESCRIPTION

[0046] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] like Figure 1 - Figure 9 As shown, the present invention provides:

[0048] The wire and cable copper wire stranding machine includes a frame 10, on which is mounted a winding mechanism 20 for winding the stranded copper wire. Specifically, the winding mechanism 20 is a well-known technology and will not be described in detail herein. A material rack unit 30 is mounted on a side of the frame 10 away from the winding mechanism 20. The material rack unit 30 includes a shaft 34 mounted in a first bearing seat 31, and a mounting plate 32 is mounted on the shaft 34.

[0049] A material rack 33 is inserted into the mounting plate 32 through a slot. The material rack 33 includes a lower insert plate 331 and an upper insert plate 332 inserted into the slot. Second bearing seats 333 are fixed to the lower insert plate 331 and the upper insert plate 332. A wire reel 334 with copper wire wound on the surface is inserted into both second bearing seats 333.

[0050] One end of the shaft 34 is equipped with a driving member, which includes a motor 35 fixed in the frame 10. The output end of the motor 35 and one end of the shaft 34 are both fixed with pulleys, and a transmission belt 36 is meshed with the two pulleys.

[0051] Specifically, a plurality of knob studs are threadedly connected to the back of the mounting plate 32. After the lower insert plate 331 and the upper insert plate 332 are inserted into the slots, the knob studs are tightened. At this time, the positions of the lower insert plate 331 and the upper insert plate 332 are fixed, thereby maintaining the pay-off drum 334 installed in the two second bearing seats 333.

[0052] When the motor 35 is started, the transmission belt 36 and the pulley will drive the shaft 34 to drive the mounting plate 32 and the pay-off drum 334 on its surface to revolve, and at the same time drive the twisting unit 50 to rotate. During the process, the twisted wire is wound under the drive of the winding mechanism 20, and the pay-off drum 334 is pulled to rotate in real time during the winding process to pay out the wire.

[0053] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the material rack 33 is equipped with an anti-loosening wire unit 40, which includes a bracket 41 fixed to the mounting plate 32. An extension frame 43 is inserted into the bracket 41 through a retaining tube 42. The extension frame 43 is rotatably connected to a rolling shaft 44 on one side close to the material rack 33. Both ends of the material rack 33 are equipped with a moving unit 45.

[0054] The other end of the shaft 34 is equipped with a stranding unit 50. The material rack 33 and the stranding unit 50 are driven by the driving member to pay off the strands. When the material rack 33 rotates, the moving unit 45 causes the rolling shaft 44 to press against the copper wire in real time, so that the copper wire maintains tension during the pay-off process.

[0055] like Figure 3 and Figure 4 As shown, the movable unit 45 includes two third bearing seats respectively fixed on the lower insert plate 331 and the upper insert plate 332, and a vertical shaft 451 is detachably fixed in the inner ring of the bearing of the third bearing seat. Both ends of the wire-paying drum 334 are provided with sockets adapted to the vertical shaft 451, and one end of the vertical shaft 451 is inserted into the socket. Specifically, a key block is fixed on the outer wall of the vertical shaft 451, and a key slot adapted to the key block is provided on the inner wall of the socket, so that with the cooperation of the key block and the key slot, the vertical shaft 451 can rotate together with the wire-paying drum 334.

[0056] like Figure 3 and Figure 4 As shown, a fourth bearing seat is fixed to one side of the surface of the lower insert plate 331 and the upper insert plate 332 close to the third bearing seat, as well as one side of the surface of the two retaining tubes 42. Specifically, the fourth bearing seat located on the retaining tube 42 is installed and fixed in a detachable manner. The fourth bearing seat is evenly divided into two groups. A threaded rod 452 is detachably fixed to the inner ring of the bearing of each group of the fourth bearing seats. A bevel gear 453 is fixed to one end of the threaded rod 452 and the vertical shaft 451, and the two bevel gears 453 are meshed with each other.

[0057] An internal threaded part 454 is threadedly sleeved on the threaded rod 452, and mounting rods are fixed on the outer walls of the two internal threaded parts 454. One end of the two mounting rods is detachably fixed with a sliding frame 455 that is slidably connected to the retaining tube 42. The end of the extension frame 43 extending into the retaining tube 42 is connected to a moving block 457 through a spring 456. The top and bottom of the moving block 457 are fixed with connecting blocks, which pass through one end of the retaining tube 42 and are fixed to the sliding frame 455.

[0058] Specifically, the installation and fixation are carried out in a detachable manner, so that before the lower insert plate 331 and the upper insert plate 332 are removed, the fourth bearing seat and the mounting rod on the upper retaining tube 42 can be removed. After removal, the upper insert plate 332 can slide upward after loosening the knob stud, and then the wire-paying drum 334 that has finished paying out the wire can be smoothly pulled out upward, and then a new wire-paying drum 334 can be replaced and the disassembled structure can be restored. At this time, the wire twisting can continue;

[0059] The detachable arrangement allows the pay-off drum 334 to be quickly and easily installed and removed, which not only improves work efficiency but also facilitates users in switching between copper wires of different specifications. The lower insert plate 331 and the upper insert plate 332 jointly support the pay-off drum 334 via the second bearing seat 333, ensuring the stability of the pay-off drum 334 during rotation and reducing quality problems of the stranded wire caused by shaking.

[0060] The pay-off drum 334 rotates during the twisting process, and the rotation drives the bevel gear 453 on the vertical shaft 451 to rotate, and then drives the bevel gear 453 engaged with it to drive the threaded rod 452 to rotate, so that the internal threaded part 454 drives the slide frame 455 to move toward the side of the pay-off drum 334, so that the rolling shaft 44 can always press against the copper wire to keep the copper wire in tension, and the setting of the spring 456 enables the rolling shaft 44 to adaptively adjust according to the copper wire of different wire diameters, maintain stable tension application, and avoid excessive tension application. The rotation design of the rolling shaft 44 reduces the friction between the copper wire and the rolling shaft, reducing the degree of wear on the copper wire.

[0061] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, the stranding unit 50 includes a mounting base 51 fixed to the frame 10. A threading disc 52 is rotatably connected to the mounting base 51 via a roller bearing. The threading disc 52 is fixed to the other end of the shaft 34. The threading disc 52 has a plurality of threading holes 53 formed therein. A plurality of middle guide balls 56 are embedded in the threading holes 53. The middle guide balls 56 are arranged in an hourglass shape.

[0062] A stranded wire guide rack 54 is mounted on one side of the threading drum 52. The stranded wire guide rack 54 includes a support rack 541 fixed to the threading drum 52. A conical rack 542 is fixed to the bottom of the support rack 541. A plurality of front guide balls 544 are rotatably connected to the conical rack 542 via a ring 543.

[0063] The other side of the threading drum 52 is equipped with a stranded wire outlet frame 55, which includes a connecting frame 551 fixed to the threading drum 52. One end of the connecting frame 551 is fixed to a wire outlet tube 552, and a plurality of rear guide balls 553 are embedded on the inner wall of the wire outlet tube 552.

[0064] Specifically, after installing the pay-off drum 334, one end of the copper wire is passed through the conical frame 542, the wire threading hole 53 and the wire outlet tube 552 in sequence and twisted together. Then, it passes through the traction component on the winding mechanism 20 and is connected to the wire taking-up component. Then, the winding mechanism 20 and the motor 35 are started to start the wire twisting operation. During the wire twisting process, the angle of the copper wire at the corner is greatly reduced under the action of the conical frame 542. Combined with the front guide ball 544, the friction force encountered when turning the corner is effectively reduced, which not only improves the smoothness of the wire twisting, but also reduces the heat and noise generated by friction. When passing through the wire threading hole 53, the middle guide ball 56 arranged in an hourglass shape further reduces the friction encountered by the copper wire.

[0065] Specifically, when the wire and cable copper wire stranding machine is working / in use:

[0066] 1. Preparation: Install the pay-off drum 334 onto the material rack 33, ensuring that the lower insert plate 331 and the upper insert plate 332 are firmly connected to the mounting plate 32 through the slots. Tighten the knob studs to secure the lower insert plate 331 and the upper insert plate 332. Then, untie one end of the copper wire from the pay-off drum 334 and pass it through the conical frame 542, the middle guide ball 56 in the threading hole 53, and the rear guide ball 553 in the outlet tube 552 in sequence. Then, twist the multiple copper wires together at the output end of the stranding unit 50, connect them to the traction component of the reeling mechanism 20, and finally connect them to the take-up component.

[0067] 2. Startup phase: Start the motor 35, which drives the shaft 34 to rotate through the cooperation of the transmission belt 36 and the pulley. The rotation of the shaft 34 drives the mounting plate 32 and the pay-off drum 334 to revolve, and the stranding unit 50 also rotates accordingly.

[0068] 3. Wire stranding process: As the pay-off drum 334 revolves and rotates (driven by the tension during the winding process), the copper wire is continuously paid out. The copper wire passes through the front guide ball 544 of the tapered frame 542 in the stranding unit 50. The angle at the corner is greatly reduced, reducing friction and wear. The copper wire passes through the hourglass-shaped guide ball 56 in the threading hole 53, further reducing friction and ensuring smooth stranding. The stranded copper wire is output from the outlet pipe 552 and is pulled and wound by the winding mechanism 20 to form the final stranded wire product.

[0069] 4. Tension control: During the stranding process, the rotation of the pay-off drum 334 drives the vertical shaft 451 and the bevel gear 453 to rotate. The meshing transmission of the bevel gear 453 drives the threaded rod 452 to rotate, and then the internal threaded part 454 drives the slide frame 455 to move. The movement of the slide frame 455 causes the rolling shaft 44 to press against the copper wire in real time through the connecting block and the moving block 457 to maintain appropriate tension. The setting of the spring 456 allows the rolling shaft 44 to be adaptively adjusted according to the copper wire of different wire diameters, while avoiding excessive or insufficient tension.

[0070] 5. End and replacement: When the copper wire on a pay-off drum 334 is finished, stop the machine and loosen the knob stud, remove the upper plug-in board 332 and related detachable parts, take out the pay-off drum 334, replace it with a new pay-off drum 334, reassemble all parts, restart the machine, and continue the wire twisting operation.

[0071] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wire and cable copper wire stranding machine, comprising a frame (10), wherein the frame (10) is equipped with a winding mechanism (20) for winding the copper wire after stranding, characterized in that: A material rack unit (30) is mounted on the side of the frame (10) away from the reeling mechanism (20), the material rack unit (30) comprising a shaft (34) mounted in a first bearing seat (31), a mounting plate (32) mounted on the shaft (34), a material rack (33) being plugged into the mounting plate (32) via a slot, and a driving member being mounted on one end of the shaft (34); The material rack (33) is equipped with an anti-loosening line unit (40), and the anti-loosening line unit (40) includes a bracket (41) fixed on the mounting plate (32), an extension frame (43) is plugged into the bracket (41) through a retaining tube (42), and a rolling shaft (44) is rotatably connected to the side of the extension frame (43) close to the material rack (33), and a moving unit (45) is commonly equipped at both ends of the material rack (33); The other end of the shaft (34) is equipped with a stranding unit (50). The material rack (33) and the stranding unit (50) are driven by the driving member to release the strands. When the material rack (33) rotates, the moving unit (45) causes the rolling shaft (44) to press against the copper wire in real time, so that the copper wire maintains tension during the release process.

2. The wire and cable copper wire stranding machine according to claim 1, characterized in that: The material rack (33) includes a lower insert plate (331) and an upper insert plate (332) inserted into the slot, and a second bearing seat (333) is fixed on each of the lower insert plate (331) and the upper insert plate (332), and a wire reel (334) with copper wire wound on the surface is inserted into both of the second bearing seats (333).

3. The wire and cable copper wire stranding machine according to claim 2, characterized in that: The moving unit (45) includes two third bearing seats respectively fixed on the lower inserting plate (331) and the upper inserting plate (332), and a vertical shaft (451) is detachably fixed in the inner ring of the bearing of the third bearing seat; Both ends of the wire-releasing drum (334) are provided with sockets adapted to the vertical shaft (451), and one end of the vertical shaft (451) is plugged into the sockets.

4. The wire and cable copper wire stranding machine according to claim 3, characterized in that: A fourth bearing seat is fixed to one side of the surface of the lower insert plate (331) and the upper insert plate (332) close to the third bearing seat and one side of the surface of the two retaining tubes (42). The fourth bearing seat is evenly divided into two groups. A threaded rod (452) is detachably fixed in the bearing inner ring of each group of the fourth bearing seats. A bevel gear (453) is fixed to one end of the threaded rod (452) and the vertical shaft (451), and the two bevel gears (453) are meshed with each other.

5. The wire and cable copper wire stranding machine according to claim 4, characterized in that: The threaded sleeve on the threaded rod (452) is provided with an internal threaded part (454), and the outer walls of the two internal threaded parts (454) are fixed with mounting rods, and one end of the two mounting rods is detachably fixed with a sliding frame (455) that is slidably connected to the retaining tube (42).

6. The wire and cable copper wire stranding machine according to claim 5, characterized in that: One end of the extension frame (43) extending into the holding tube (42) is connected to a moving block (457) via a spring (456), and a connecting block is fixed to the top and bottom of the moving block (457), and the connecting block passes through one end of the holding tube (42) and is fixed to the sliding frame (455).

7. The wire and cable copper wire stranding machine according to claim 1, characterized in that: The stranding unit (50) includes a mounting seat (51) fixed on the frame (10), a threading disc (52) rotatably connected to the mounting seat (51) via a roller bearing, the threading disc (52) being fixed to the other end of the shaft (34), a plurality of threading holes (53) being provided on the threading disc (52), a stranded wire guide frame (54) being mounted on one side of the threading disc (52), and a stranded wire outlet frame (55) being mounted on the other side of the threading disc (52); A plurality of middle guide balls (56) are embedded in the threading hole (53), and the middle guide balls (56) are arranged in an hourglass shape.

8. The wire and cable copper wire stranding machine according to claim 7, characterized in that: The stranded wire guide frame (54) comprises a support frame (541) fixed on the threading disk (52), a conical frame (542) is fixed at the bottom of the support frame (541), and a plurality of front guide balls (544) are rotatably connected to the conical frame (542) via a ring (543).

9. The wire and cable copper wire stranding machine according to claim 7, characterized in that: The stranded wire outlet frame (55) comprises a connecting frame (551) fixed on the threading disc (52); a wire outlet tube (552) is fixed to one end of the connecting frame (551); and a plurality of rear guide balls (553) are embedded on the inner wall of the wire outlet tube (552).

10. The wire and cable copper wire stranding machine according to claim 1, characterized in that: The driving member includes a motor (35) fixed in the frame (10), and pulleys are fixed to the output end of the motor (35) and one end of the shaft (34), and a transmission belt (36) is engaged with the two pulleys.

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