Wire pressing disc and wire pressing assembly

Abstract

The wire pressing disc comprises a wire pressing disc body used for being concentrically matched with a brush disc, a plurality of sliding grooves are evenly formed in the periphery of the wire pressing disc body in the circumferential direction, and telescopic rods capable of stretching out and drawing back in the radial direction are arranged in the sliding grooves, so that the multiple telescopic rods can change the pressing covering area of the wire pressing disc body through radial stretching out and drawing back; when the two wire pressing discs are vertically oppositely combined to the two sides of the brush disc to form the wire pressing assembly, the telescopic rods stretch out to press wires on the two sides of the brush disc, the situation that the wires are scattered due to accidental springback is avoided, it is guaranteed that the next strand splitting and fixing process can be stably carried out, and the efficiency and quality of polish-brush disc forming are improved.

Description

Technical Field

[0001] The invention relates to the field of plate and strip grinding, and in particular to a wire pressing disc and a wire pressing assembly. Background Art

[0002] The plates and strips are usually made by hot rolling process. Before actual use, rust, oxide scale, etc. will appear on the surface of the plates and strips, and the surface of the plates and strips needs to be brushed by brush rollers. To facilitate disassembly and maintenance, an existing brush roller structure is configured to sleeve multiple grinding brush discs on the roller shaft. The grinding brush disc includes a brush disc, and the inner side of the brush disc is provided with multiple through holes evenly distributed along the circumferential direction. Wires made of resin material need to be passed through the through holes. The wires are folded in half along the radial direction away from the brush disc to form two strands of wire located at both ends of the brush disc. The two strands of wire need to be fixed together by wire winding or hot-melt welding to form brush strips for grinding the surface of the plates and strips.

[0003] When the wire is folded manually or with processing equipment, the wire can indeed form two strands of wire located on both sides of the brush disc under the action of external force. However, the wire itself is elastic. Once the external force is removed, the two strands of wire tend to rebound outward and spread out, which not only causes the previously folded wire to deviate from the predetermined position, but also brings unnecessary trouble to the next step of fixing the strands of wire, affecting the forming efficiency and quality of the brush disc. Summary of the invention

[0004] The present invention provides a wire pressing disc, which arranges a plurality of slide grooves along the circumferential direction at the outer circumference of the wire pressing disc body, and arranges radially movable telescopic rods in the slide grooves, so that the plurality of telescopic rods can change the pressing area of ​​the wire pressing disc body by radial expansion and contraction.

[0005] Furthermore, a wire pressing assembly is provided, in which two wire pressing discs are aligned up and down in the alignment area at both end surfaces of the brush disc, so that the telescopic rod can compress or release the wire strands on both sides of the corresponding through holes on the brush disc through radial extension and contraction, thereby avoiding accidental rebound or dispersion of the wire and ensuring the molding quality and efficiency of the grinding brush disc.

[0006] The technical solution of the present invention is achieved in this way: A wire pressing disc comprises a wire pressing disc body used for coaxially cooperating with a brush disc. A plurality of slide grooves extending radially toward the inner side of the wire pressing disc body are evenly distributed along the circumferential direction at the outer circumference of the wire pressing disc body. A telescopic rod which can be extended or retracted radially is slidably connected in each slide groove.

[0007] Preferably, the outer end of the telescopic rod has two opposite first limiting portions, and a second limiting portion is formed between every two adjacent slide grooves on the outer periphery of the wire pressing disc body. When the telescopic rod is retracted, the first limiting portion and the second limiting portion are abutted against each other; so as to prevent the entire telescopic rod from being completely retracted into the slide groove.

[0008] Preferably, a plurality of through weight-reducing grooves are arranged circumferentially on the end surface of the wire pressing disc; the weight-reducing grooves can make the wire pressing disc lighter and save the manufacturing cost of the wire pressing disc.

[0009] Preferably, the telescopic length of the telescopic rod ranges from 10 mm to 40 mm.

[0010] A wire pressing assembly comprises a brush disc and two of the wire pressing discs, wherein a plurality of through holes for threading wire are evenly distributed in the circumferential direction on the upper end surface of the brush disc, and the plurality of through holes are arranged on both end surfaces of the brush disc to form a matching area; the two wire pressing discs are matched up and down at the two end surfaces of the brush disc and are located in the matching area, and a plurality of telescopic rods correspond to the positions of the plurality of through holes of the brush disc one by one; when the telescopic rods are extended radially, the telescopic rods extend outward beyond the matching area.

[0011] Preferably, a plurality of guide grooves corresponding to the positions of the slide grooves are evenly distributed along the circumferential direction on the end surface of the wire pressing disc body facing away from the brush disc, and the guide grooves extend radially; the guide grooves are connected to the corresponding slide grooves; a protrusion slidably connected in the guide groove is provided on the telescopic rod, and the protrusion passes through the guide groove and exceeds the corresponding end surface of the wire pressing disc body; so that external force acts on the protrusion, thereby controlling the telescopic rod to extend or retract radially.

[0012] Preferably, the wire pressing disc includes a mating end surface that fits with the brush disc, and a distance is left between the telescopic rod and the mating end surface, so that an escape zone for avoiding the wire is formed between the telescopic rod and the brush disc; the width of the escape zone is equivalent to the thickness of the stranded wire fit on the end surface of the brush disc, so as to avoid destructive extrusion pressure on the wire after the telescopic rod is extended.

[0013] Preferably, the telescopic rod has two opposite side guards extending toward the brush plate, and the telescopic rod and the two side guards form the avoidance area; the two opposite side guards can limit the filaments from spreading to both sides of the telescopic rod when the telescopic rod is extended.

[0014] Preferably, it also includes a support shaft, and the two wire pressing discs are divided into an upper wire pressing disc and a lower wire pressing disc by a brush disc. The wire pressing disc has a center hole in the center position, and the upper and lower wire pressing discs are sleeved on the upper end position of the support shaft through the center hole; a control component for connecting or separating the upper and lower wire pressing discs is provided at the center hole position; the upper positioning disc can be freely locked or unlocked through the control component according to processing and use requirements, thereby meeting the use requirements of the grinding brush disc molding.

[0015] Preferably, the control component includes a matching sleeve concentrically connected to the center hole position of the upper wire pressing disk, a accommodating hole is opened at the upper end part of the support shaft, a through limiting hole is opened on the inner wall of the accommodating hole, a movable limiting ball is arranged in the limiting hole, and a limiting groove corresponding to the position of the limiting ball and having an arc-shaped cross-sectional shape is arranged on the matching sleeve; an elastically retractable control shaft is arranged in the accommodating groove, and the control shaft includes a large diameter section and a small diameter section; the control component has a locked state and an unlocked state; when the control component is in the locked state, the large diameter section of the control shaft resists the limiting ball, and the limiting ball is stuck in the limiting groove, so that the upper wire pressing disk and the lower wire pressing disk remain connected; when the control component is in the unlocked state, the control shaft is elastically retracted and expanded by external force, so that the small diameter section corresponds to the position of the limiting ball, and at this time the limiting ball can escape from the limiting groove, so that the upper wire pressing disk and the lower wire pressing disk are separated.

[0016] Preferably, the end face of the lower wire pressing disc facing the upper wire pressing disc has a positioning pin, and the end face of the brush disc has a positioning notch matching the positioning pin, and the positioning pin is stuck in the positioning notch; so as to limit the movement of the brush disc in the circumferential direction relative to the wire pressing assembly.

[0017] Preferably, a pin hole corresponding to the position of the positioning pin is provided on the end surface of the upper wire pressing disc facing the lower wire pressing disc, and the positioning pin is inserted into the pin hole to avoid relative movement of the upper wire pressing disc and the lower wire pressing disc in the circumferential direction.

[0018] The beneficial effects of the present invention using the above technical solution are: By evenly distributing multiple slide grooves along the circumference of the outer periphery of the wire pressing disc, and arranging a telescopic rod that can be extended and retracted radially in the slide groove, when the two wire pressing discs are aligned up and down on both sides of the brush disc, the telescopic rod can be extended to press the wire on both sides of the brush disc to prevent the wire from accidentally rebounding and causing it to disperse, ensuring that the next step of fixing the wire strands can be carried out stably, thereby improving the efficiency and quality of the brush disc forming.

[0019] After the material wires are folded outward, the multiple material wires will be close to the end surface of the brush plate. In order to protect the parts of the multiple material wires that are attached to the end surface of the brush plate, an avoidance zone is set between the telescopic rod and the brush plate. The avoidance zone can prevent the telescopic rod from forming a destructive shear force on the material wires when the telescopic rod is extended and presses the material wires, thereby protecting the material wires.

[0020] Since the material wire itself is elastic, multiple side-by-side material wires still have a tendency to spread out to both sides of the circumference of the brush plate after being compressed by the telescopic rod. Therefore, the telescopic rod is provided with two opposite side blocks extending toward the brush plate. The side blocks can confine the multiple side-by-side material wires in the avoidance area to prevent the multiple material wires from spreading out from both sides.

[0021] A radially extending guide groove is arranged on the end surface of the wire pressing disc body facing away from the brush disc, and a protrusion is slidably connected in the guide groove. The protrusion exceeds the end surface of the wire pressing disc body, so that external force can control the extension or retraction of the telescopic rod by toggling the protrusion, so that the telescopic rod can quickly compress or release the divided wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the brush disc forming equipment; Figure 2 This is an enlarged view of the telescopic rod on the wire pressing disc; Figure 3 It is an enlarged view of the telescopic rod after being extended radially outward; Figure 4 This is a structural diagram of the wire pressing assembly.

[0023] Figure 5 This is an enlarged view of the positioning pin; Figure 6 This is a partial enlarged view of the control component unlocking the upper wire pressing disc; Figure 7 This is a partial enlarged view of the control component when it is locked on the upper wire pressing disc; The reference numerals of the drawings are: 1-machine table, 2-turntable, 3-wire threading mechanism, 4-hot melt welding mechanism, 5-push-reset mechanism, 8-wire, 9-brush plate, 63-wire pressing plate, 63a-center hole, 64-stepping drive motor, 66-matching sleeve, 67-control shaft, 68-limiting ball, 91-through hole, 92-matching area, 93-positioning notch, 631-upper wire pressing plate, 631a-second limit Positioning part, 631b-slide groove, 631c-weight reduction groove, 631d-positioning pin, 632-guide groove, 633-telescopic rod, 633a-first limiting part, 634-raised part, 635-avoidance area, 636-support shaft, 636a-limiting hole, 637-electromagnetic clutch assembly, 638-lower pressure wire disc, 661-compression spring, 662-limiting slot, 671-small diameter section, 672-large diameter section. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] The specific implementation methods of the present invention are as follows: like Figure 1-7 As shown, the present embodiment provides a wire pressing disc, including a wire pressing disc body 63 for cooperating concentrically with the brush disc 9, the outer diameter of the wire pressing disc body 63 is smaller than the outer diameter of the brush disc 9, and a plurality of slide grooves 631b extending radially toward the inner side of the wire pressing disc body 63 are evenly distributed along the circumferential direction at the outer periphery of the wire pressing disc body 63, and a telescopic rod 633 which can be radially extended or retracted is slidably connected in each slide groove 631b; when cooperating in the same direction with the brush disc 9, the telescopic rod 633 is extended or retracted, which can change the pressing area of ​​the wire pressing disc body 63 on the end face of the brush disc 9, thereby providing a structural basis for the telescopic rod 633 to compress the divided wires.

[0027] Furthermore, in order to prevent the telescopic rod 633 from completely entering the slide groove 631b when retracting, the outer end of the telescopic rod 633 has two opposite first limiting portions 633a, and a second limiting portion 631a is formed between every two adjacent slide grooves 631b on the outer periphery of the wire pressing disc 63. When the telescopic rod 633 is retracted, the first limiting portion 633a and the second limiting portion 631a are abutted against each other; so as to avoid the entire telescopic rod 633 from being completely retracted into the slide groove 631b.

[0028] Furthermore, a plurality of through weight-reducing grooves 631 c are arranged circumferentially on the end surface of the wire pressing disc 63 ; the weight-reducing grooves 631 c can reduce the weight of the wire pressing disc 63 and save the manufacturing cost of the wire pressing disc 63 .

[0029] like Figure 4 As shown, a wire pressing assembly is further provided, including a brush disc 9 and two of the wire pressing discs, wherein a plurality of through holes 91 for passing the material wire 8 are evenly distributed along the circumferential direction on the end surface of the brush disc 9, and the plurality of through holes 91 are surrounded by a matching area 92 on both end surfaces of the brush disc 9; the two wire pressing discs are matched up and down at the two end surfaces of the brush disc 9 and are located in the matching area 92, and the plurality of telescopic rods 633 correspond one to one with the positions of the plurality of through holes 91 of the brush disc 9; when the telescopic rod 633 is extended radially, the telescopic rod 633 extends outward beyond the matching area 92.

[0030] Furthermore, the telescopic length of the telescopic rod 633 needs to be maintained within a reasonable range. If the telescopic length of the telescopic rod 633 is too short, it will be difficult to compress the wire. If the telescopic length is too long, the entire stranded wire will be covered, making it difficult for the welding head of the hot melt welding machine to contact the stranded wire, affecting the next step of the fixing process. Therefore, in this embodiment, the telescopic length range of the telescopic rod 633 is 10mm-40mm; within this range, the telescopic rod 633 can not only compress the wire, but also expose part of the wire after being extended, which is convenient for the next step of fixing the two strands of wire.

[0031] Furthermore, in order to facilitate the control of the extension or retraction of the telescopic rod 633 so that the wire pressing disc body 63 can compress or release the wire, a plurality of guide grooves 632 corresponding to the positions of the slide grooves 631b are evenly distributed along the circumferential direction on the end surface of the wire pressing disc body 63 facing away from the brush disc 9, and the guide grooves 632 extend radially; the guide grooves 632 are connected to the corresponding slide grooves 631b; the telescopic rod 633 is provided with a protrusion 634 which is slidably connected in the guide groove 632, and the protrusion 634 passes through the guide groove 632 and exceeds the corresponding end surface of the wire pressing disc body 63; so that external force can act on the protrusion 634, thereby controlling the telescopic rod 633 to extend or retract radially.

[0032] Furthermore, the wire pressing disk includes a mating end surface that fits with the brush disk 9. After the wire is folded outward, multiple wires will be close to the end surface of the brush disk. In order to protect the parts of the multiple wires that are attached to the end surface of the brush disk, the telescopic rod 633 is spaced apart from the mating end surface, thereby forming an escape zone 635 between the telescopic rod 633 and the brush disk 9 for avoiding the wire 8. The width of the escape zone 635 is equivalent to the thickness of the wire attached to the end surface of the brush disk 9, so as to avoid destructive squeezing pressure on the wire after the telescopic rod 633 is extended, thereby ensuring that the telescopic rod 633 protects the wire while extending.

[0033] Furthermore, the material wire itself is elastic, and after being compressed by the telescopic rod, multiple parallel material wires still have a tendency to spread out to both sides of the brush plate. Therefore, in this embodiment, the telescopic rod 633 has two opposite side blocks 635a extending toward the brush plate 9, and the telescopic rod 633 and the two side blocks 635a form the avoidance area 635; the two opposite side blocks 635a can confine the material wire within the avoidance area 635 when the telescopic rod is extended, so as to prevent the material wire from spreading out to both sides of the telescopic rod 633 due to its own rebound.

[0034] like Figure 6-7As shown, the wire pressing assembly also includes a support shaft 636, and the two wire pressing discs are divided into an upper wire pressing disc 631 and a lower wire pressing disc 638 by a brush disc 9. The center position of the wire pressing disc has a center hole 63a, and the upper wire pressing disc 631 and the lower wire pressing disc 638 are sleeved on the upper end position of the support shaft 636 through the center hole 63a; when the two stranded wires on the brush disc 9 are not fixed, the upper wire pressing disc 631 and the lower wire pressing disc 638 need to be kept relatively fixed to compress the wires; after the two stranded wires on the brush disc 9 are fixed, the finished wires need to be Therefore, in this embodiment, a control component is provided at the position of the center hole 63a to connect or separate the upper wire pressing disc 631 and the lower wire pressing disc 638; the control component includes a matching sleeve 66 concentrically connected to the center hole 63a of the upper wire pressing disc 631, a receiving hole is provided at the upper end of the support shaft 636, a through-limiting hole 636a is provided on the inner wall of the containing hole, a movable limiting ball 68 is provided in the limiting hole 636a, and a corresponding limiting ball 68 position is provided on the matching sleeve 66. The cross-sectional shape of the limit slot 662 is an arc; the accommodating groove is provided with an elastically retractable control shaft 67, specifically, the accommodating hole is provided with a compression spring 661, the compression spring acts on the bottom end of the control shaft 636, and the external force pressing the control shaft 636 can cause the compression spring 661 to deform; the control shaft 67 includes a large diameter section 672 and a small diameter section 671; the control component has a locked state and an unlocked state; when the control component is in the locked state, the large diameter section 672 of the control shaft 67 abuts against the limit ball 68, and the limit ball 6 8 is stuck in the limiting slot 662 to keep the upper wire pressing disc 631 and the lower wire pressing disc 638 connected; when the control component is in the unlocked state, the external force controls the elastic expansion and contraction of the control shaft 67 to make the small diameter section 671 correspond to the position of the limiting ball 68. At this time, the limiting ball 68 can escape from the limiting slot 662 to separate the upper wire pressing disc 631 and the lower wire pressing disc 638; the upper positioning disc 631 can be freely locked or unlocked by the control component according to the processing and use requirements, so as to meet the use requirements of the brush disc molding.

[0035] like Figure 5 As shown, in order to prevent the brush disc 9 from moving circumferentially on the wire pressing assembly, a positioning pin 631d is provided on the end face of the lower wire pressing disc 638 facing the upper wire pressing disc 631, and a positioning notch 93 matching the positioning pin 631d is provided on the end face of the brush disc 9, and the positioning pin 631d is stuck in the positioning notch 93.

[0036] Furthermore, in order to prevent the upper wire pressing disc 631 and the lower wire pressing disc 638 from moving relative to each other in the circumferential direction, a pin hole corresponding to the position of the positioning pin 631d is provided on the end surface of the upper wire pressing disc 631 facing the lower wire pressing disc 638, and the positioning pin 631d is inserted into the pin hole.

[0037] The wire pressing assembly in this embodiment can press the stranded wires on both sides of the brush disc 9 onto the end surface of the brush disc 9, so that when the brush disc is produced manually or by processing equipment, the wires are effectively prevented from being misplaced after rebounding. Taking the brush disc forming equipment as an example, Figure 1 As shown, the brush plate grinding equipment includes a machine 1, on which a wire threading mechanism 3, a hot-melt welding mechanism 4 and a turntable 2 are sequentially arranged, and the turntable 2 is provided with the wire pressing assembly to drive the brush plate 9 to rotate step by step at a predetermined angle so that the through holes 91 on the brush plate 9 complete the wire threading or welding one by one; a mounting hole is provided in the middle of the turntable 2, and a push-to-reset mechanism 5 independent of the turntable 2 is provided in the mounting hole; a stepping drive motor 64 is arranged near the wire threading mechanism 3 and the hot-melt welding mechanism 4, and an electromagnetic clutch assembly 637 cooperating with the stepping drive motor 64 is provided at the bottom end of the support shaft 636 on each wire pressing assembly.

[0038] When the brush plate forming equipment is working, the wire threading mechanism 3 can pass multiple wires 8 of a predetermined length into one of the through holes 91 of the brush plate 9, and through the action of the protrusion 634 on the wire pressing plate body 63, the corresponding telescopic rod 633 is extended and the two stranded wires are pressed tightly, and then the stepping drive motor 64 near the wire threading mechanism 3 drives the two wire pressing plates 63 to rotate so that the next through hole is aligned with the wire 8; alternating reciprocation until all the telescopic rods 633 are extended and the stranded wires are pressed tightly, and then the turntable 2 rotates and the brush plate 9 is moved to the hot melt welding mechanism 4, the welding head on the hot melt welding mechanism 4 descends and welds the two stranded wires to fix them, and then the hot melt welding mechanism 4 The nearby stepper drive motor 64 drives the two wire pressing discs 63 to rotate, so that the next group of stranded wires are aligned with the welding head, and they move back and forth alternately until the two stranded wires at all the through holes 91 are welded and fixed; then, in order to reset the telescopic rod 633, it is necessary to rely on the pushing and resetting mechanism 5 to reset the multiple telescopic rods 633. The pushing and resetting mechanism 5 includes a push plate driven by a cylinder, which extends and retracts and acts on one of the telescopic rods 633 to retract and return to its original position. Then, the stepper drive motor 64 near the hot melt welding mechanism 4 drives the two wire pressing discs 63 to rotate, so that the next telescopic rod 633 is aligned with the push plate, and they move back and forth alternately until all the telescopic rods 633 are retracted and returned to their original position.

[0039] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A wire pressing disc, characterized in that: It comprises a wire pressing disc body (63) for coaxially cooperating with a brush disc (9), wherein a plurality of slide grooves (631b) are evenly distributed along the circumference of the outer periphery of the wire pressing disc body (63) and extend radially toward the inner side of the wire pressing disc body (63), and each slide groove (631b) is slidably connected with a telescopic rod (633) that can be extended or retracted radially.

2. A wire pressing disc according to claim 1, characterized in that: The outer end of the telescopic rod (633) has two opposite first limiting portions (633a), and a second limiting portion (631a) is formed between every two adjacent slide grooves (631b) on the outer periphery of the wire pressing disc (63). When the telescopic rod (633) is retracted, the first limiting portion (633a) and the second limiting portion (631a) are abutted against each other.

3. A wire pressing disc according to claim 1, characterized in that: A plurality of through-going weight-reducing grooves (631c) are arranged along the circumferential direction on the end surface of the wire pressing disc body (63).

4. A wire pressing disc according to claim 1, characterized in that: The telescopic length range of the telescopic rod (633) is 10 mm to 40 mm.

5. A wire pressing assembly, characterized in that: It comprises a brush disc (9) and two wire pressing discs as claimed in claim 1, wherein a plurality of through holes (91) for passing the material wire (8) are evenly distributed along the circumferential direction on the end surface of the brush disc (9), and the plurality of through holes (91) are arranged on both end surfaces of the brush disc (9) to form a mating area (92); the two wire pressing discs are vertically mated at the two end surfaces of the brush disc (9) and are located in the mating area (92), and the positions of the plurality of telescopic rods (633) and the plurality of through holes (91) of the brush disc (9) correspond one to one; when the telescopic rods (633) are extended radially, the telescopic rods (633) extend outward beyond the mating area (92).

6. A wire pressing assembly according to claim 5, characterized in that: A plurality of guide grooves (632) corresponding to the positions of the slide grooves (631b) are evenly distributed along the circumferential direction on the end surface of the wire pressing disc (63) facing away from the brush disc (9), and the guide grooves (632) extend radially; the guide grooves (632) are connected to the corresponding slide grooves (631b); a protrusion (634) slidably connected in the guide groove (632) is provided on the telescopic rod (633), and the protrusion (634) passes through the guide groove (632) and exceeds the corresponding end surface of the wire pressing disc (63).

7. A wire pressing assembly according to claim 6, characterized in that: The wire pressing disc comprises a mating end face that fits the brush disc (9), and a distance is left between the telescopic rod (633) and the mating end face, thereby forming an escape zone (635) for evading the material wire (8) between the telescopic rod (633) and the brush disc (9).

8. A wire pressing assembly according to claim 7, characterized in that: The telescopic rod (633) has two opposite side blocking portions (635a) extending towards the brush plate (9), and the telescopic rod (633) and the two side blocking portions (635a) enclose the avoidance area (635).

9. A wire pressing assembly according to claim 5, characterized in that: It also includes a support shaft (636), two wire pressing discs are divided into an upper wire pressing disc (631) and a lower wire pressing disc (638) by a brush disc (9), a center hole (63a) is provided at the center of the wire pressing disc, and the upper wire pressing disc (631) and the lower wire pressing disc (638) are sleeved on the upper end of the support shaft (636) through the center hole (63a); a control component for connecting or separating the upper wire pressing disc (631) and the lower wire pressing disc (638) is provided at the center hole (63a).

10. A wire pressing assembly according to claim 9, characterized in that: The control component comprises a matching sleeve (66) which is coaxially connected to the center hole (63a) of the upper wire pressing disk (631); a receiving hole is provided at the upper end of the support shaft (636); a through-going limiting hole (636a) is provided on the inner wall of the receiving hole; a movable limiting ball (68) is provided in the limiting hole (636a); a limiting groove (662) which corresponds to the position of the limiting ball (68) and has an arc-shaped cross-section is provided on the matching sleeve (66); an elastically retractable control shaft (67) is provided in the receiving groove; the control shaft (67) comprises a large diameter section (672) and a small diameter section (671); the control The component has a locked state and an unlocked state. When the control component is in the locked state, the large diameter section (672) of the control shaft (67) abuts against the limiting ball (68), and the limiting ball (68) is stuck in the limiting slot (662), so that the upper wire pressing disc (631) and the lower wire pressing disc (638) remain connected. When the control component is in the unlocked state, an external force acts on the control shaft (67) to elastically expand and contract, so that the small diameter section (671) corresponds to the position of the limiting ball (68), and the limiting ball (68) can be disengaged from the limiting slot (662), so that the upper wire pressing disc (631) and the lower wire pressing disc (638) are separated.

11. A wire pressing assembly according to claim 9, characterized in that: A positioning pin (631d) is provided on the end surface of the lower wire pressing disc (638) facing the upper wire pressing disc (631), and a positioning notch (93) matching the positioning pin (631d) is provided on the end surface of the brush disc (9), and the positioning pin (631d) is stuck in the positioning notch (93).

12. A wire pressing assembly according to claim 11, characterized in that: A pin hole corresponding to the position of the positioning pin (631d) is provided on the end surface of the upper wire pressing disc (631) facing the lower wire pressing disc (638), and the positioning pin (631d) is inserted into the pin hole.

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