CN217223002U

CN217223002U - Noble metal strip wire drawing device

Info

Publication number: CN217223002U
Application number: CN202220094881.8U
Authority: CN
Inventors: 王松; 李刚
Original assignee: Shenzhen Jin'ansheng Jewelry Co ltd
Current assignee: Shenzhen Jin'ansheng Jewelry Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-08-19
Anticipated expiration: 2032-01-14

Abstract

The application relates to a precious metal strip wire drawing device, which belongs to the technical field of precious metal processing and comprises an installation frame, a wire drawing jig arranged on the installation frame, a clamping assembly and a driving mechanism, wherein the clamping assembly is arranged on the installation frame in a sliding manner; the clamping assembly is used for clamping the precious metal strip, the clamping assembly can slide towards the direction close to or away from the stay wire jig, the driving mechanism is used for driving the clamping assembly to slide towards the direction away from the stay wire jig, and a shaping round hole is formed in the side face, close to the clamping assembly, of one side of the stay wire jig. The method has the effect of improving the processing efficiency of the line forming processing of the noble metal.

Description

Noble metal strip wire drawing device

Technical Field

The application relates to the field of noble metal processing, in particular to a noble metal strip wire drawing device.

Background

Precious metals such as gold and silver tend to have smaller hardness and higher ductility, and the precious metals such as gold and silver used in the prior jewelry processing process tend to be in the form of silk threads with different cross-sectional shapes and thicknesses, so that the precious metals are required to be firstly processed into the thread shape with the circular cross-sectional shape.

The related processing method of the noble metal wire is to repeatedly beat the gold or silver strip by a rubber hammer manually, so that the soft noble metal strip is gradually beaten into a thinner wire shape.

In view of the above-mentioned related art, the inventors consider that the processing method of hammering the noble metal strip into a wire shape by manual hammering has a defect of low processing efficiency.

SUMMERY OF THE UTILITY MODEL

In order to improve the machining efficiency of noble metal line processing, this application provides a noble metal strip guy wire device.

The application provides a noble metal strip device of acting as go-between adopts following technical scheme:

a precious metal strip wire drawing device comprises a mounting frame, a wire drawing jig arranged on the mounting frame, a clamping assembly arranged on the mounting frame in a sliding mode and a driving mechanism; the clamping component is used for clamping the precious metal strips, the clamping component can slide towards the direction close to or away from the stay wire jig, the driving mechanism is used for driving the clamping component to slide towards the direction away from the stay wire jig, and a shaping round hole is formed in the side face, close to the clamping component, of one side of the stay wire jig.

Through adopting above-mentioned technical scheme, the artifical one end hammering that will treat the noble metal strip of processing becomes the toper that can pass the setting round hole thickness, the one end that will treat the tapering one end of noble metal strip and keep away from the clamping component from the setting round hole inserts and wear out from the one end that is close to the clamping component, the conical one end centre gripping of noble metal strip is fixed on the clamping component to the clamping component of clamping component's clamping end, actuating mechanism drive clamping component is to keeping away from the direction motion of the tool of acting as go-between, because the texture of noble metal is softer and have better ductility, the noble metal strip that passes the setting round hole passes through the extrusion of the pore wall of setting round hole, make thicker noble metal strip press into thinner threadiness, the efficiency of noble metal strip line processing has been improved when using manpower sparingly.

Optionally, the stay wire jig is detachably connected to the mounting frame.

Through adopting above-mentioned technical scheme, in order to reduce the friction between the pore wall of noble metal strip and setting round hole, make the noble metal strip can more smoothly wear the setting round hole, often can smear lubricating oil in the surface of noble metal strip and the setting round hole, can store up the filth on the tool of acting as go-between of long-time use and in the setting round hole, cross when needs maintain the cleanness to the tool of acting as go-between, can dismantle the tool of acting as go-between of setting on the mounting bracket and conveniently dismantle from the mounting bracket and carry out clean maintenance.

Optionally, the shaping circular holes are provided in plurality, and the shaping circular holes are arranged at intervals.

By adopting the technical scheme, the guy wire processing can be simultaneously carried out on a plurality of noble metal strips,

optionally, the edges of the two end openings of the shaped circular hole are in arc transition.

By adopting the technical scheme, on one hand, the arc transition-shaped orifice plays a role in guiding one end of the noble metal strip when inserted into the shaping circular hole; on the other hand, if the clamping end of the clamping assembly is not just opposite to the shaping round hole, when the clamping assembly clamps and fixes the precious metal strip and performs wire drawing processing, the precious metal wire drawn out from the shaping round hole can be bent at the edge of the orifice of the shaping round hole, and the orifice in the shape of arc transition enables the precious metal wire bent at the edge of the shaping round hole to be difficult to damage due to crease pressed out by the edge of the orifice, so that the finished precious metal wire is damaged.

Optionally, the clamping assembly is rotatably disposed on the mounting frame.

Through adopting above-mentioned technical scheme, if the position of centre gripping subassembly is not just right with the setting round hole, the noble metal wire of taking out in the setting round hole takes place to buckle at the exposed core of centre gripping subassembly easily, make the noble metal wire fracture at the exposed core of centre gripping subassembly easily when the fixed noble metal strip of centre gripping subassembly centre gripping is acted as go-between man-hour, influence subsequent processing, the centre gripping subassembly that rotates the setting makes the exposed core of centre gripping subassembly keep the direction towards the setting round hole easily, and then make the noble metal wire difficult emergence of buckling at the exposed core of centre gripping subassembly.

Optionally, a shutdown switch is arranged on the mounting frame, the shutdown switch is arranged on a motion track of the clamping assembly, the clamping assembly is located between the shutdown switch and the stay wire jig, the shutdown switch is electrically connected with the driving mechanism, and the shutdown switch is used for controlling the driving mechanism to stop working.

Through adopting above-mentioned technical scheme, when actuating mechanism drive centre gripping subassembly that the centre gripping is fixed with the noble metal strip moved to shutdown switch department, shutdown switch started after centre gripping subassembly and the shutdown switch collision contact, control actuating mechanism stop work, and the centre gripping subassembly stops the tractive to the noble metal strip, has avoided as far as possible because the centre gripping subassembly leads to accomplishing the noble metal line of processing to be further attenuated to the tractive time overlength of noble metal strip, influences the quality of noble metal strip line processing.

Optionally, the driving mechanism includes a transmission driving assembly, a transmission assembly and a control driving assembly, and the transmission assembly includes a driving gear rotatably disposed on the mounting frame, a plurality of driven gears rotatably disposed on the mounting frame, an auxiliary wheel coaxially and fixedly connected with the driving gear, and a transmission chain connected with the clamping assembly; the transmission chain is sleeved between the driving gear and the driven gears and is simultaneously meshed with the driving gear and the driven gears;

the transmission driving assembly comprises a transmission driving piece and a transmission wheel which are arranged on the mounting frame, the transmission driving piece is used for driving the transmission wheel to rotate, the transmission wheel is arranged adjacent to the driving gear, the auxiliary wheel is arranged between the transmission wheel and the driving gear, the transmission wheel is used for being meshed with the auxiliary wheel, and the transmission wheel can move towards the direction close to or away from the driving gear; the control driving assembly is used for driving the driving wheel to move towards the direction close to or far away from the driving gear.

By adopting the technical scheme, the driving component is controlled to drive the driving wheel to move towards the direction close to the driving paper wheel, so that the driving wheel is meshed with the auxiliary wheel on the driving gear, the driving piece drives the driving wheel to rotate, the driving wheel drives the auxiliary wheel and the driving gear to rotate, and the driving chain sleeved and meshed between the driving gear and the driven gears moves, so that the clamping component connected with the driving chain is driven to slide; when the distance between the clamping assembly and the wire drawing jig needs to be adjusted manually, the driving wheel is driven by the control driving assembly to move in the direction away from the driving paper wheel, so that the driving wheel is separated from the auxiliary wheel on the driving gear, when the clamping assembly slides manually, the driving gear moves along with the driving chain and is not easily influenced by the driving wheel and the driving piece, resistance in the process of sliding the clamping assembly manually is reduced, and sliding is facilitated.

Optionally, the auxiliary wheel is a ratchet wheel, the ratchet on the auxiliary wheel is arranged on the side surface close to one side of the driving wheel, and the auxiliary wheel and the driving wheel are in one-way transmission; when the clamping assembly moves towards the direction close to the wire pulling jig, the auxiliary wheel and the driving wheel are not in transmission with each other.

Through adopting above-mentioned technical scheme, drive assembly can only drive the centre gripping subassembly to keeping away from the direction motion of the tool of acting as go-between for when the fixed noble metal strip of centre gripping subassembly centre gripping and carrying out the processing of acting as go-between, even the circumstances that driving piece drive wheel reversal appears because misoperation or driving piece break down, because the pinion does not transmit with the drive wheel, drive assembly is difficult for driving the centre gripping subassembly to the direction motion of being close to the tool of acting as go-between, and then is difficult for causing the damage to the noble metal line of accomplishing the line processing.

Drawings

Fig. 1 is a schematic structural diagram of a noble metal strip wire drawing device according to the present application.

Fig. 2 is a schematic view showing a structure at a position below a mounting plate in a noble metal strip wire drawing device according to the present invention.

Fig. 3 is a schematic structural diagram of a clamp in a noble metal strip wire drawing device according to the present application.

Fig. 4 is a schematic view highlighting the structure of the drive mechanism in a noble metal strip pulling apparatus of the present application.

Fig. 5 is an exploded view of the combination of the driving gear, the secondary gear, the pipe frame and the casing in the noble metal strip wire pulling device according to the present invention.

Fig. 6 is a schematic structural diagram showing the transmission matching between the auxiliary wheel and the transmission wheel in the noble metal strip wire drawing device of the present application.

Fig. 7 is a schematic view highlighting the construction of the control drive assembly in a noble metal strip pulling apparatus of the present application.

Description of the reference numerals: 1. a mounting frame; 11. a frame body; 12. mounting a plate; 13. a jig support; 131. a limiting groove; 14. a long slide hole; 15. an orientation rack; 151. an orientation bar; 2. a clamping assembly; 21. a carriage; 211. a deflector rod; 22. a clamp; 221. clamping arms; 2211. a hinge portion; 2212. a clamping portion; 2213. a drive section; 222. a holding rod; 223. a spring; 3. a drive mechanism; 31. a transmission drive assembly; 311. a servo motor; 312. a transmission rod; 313. a driving wheel; 3131. a chute; 314. a support frame; 32. a transmission assembly; 321. a driven gear; 322. a driving gear; 323. a secondary wheel; 324. a drive chain; 325. a pipe frame; 326. a sleeve; 33. controlling the drive assembly; 331. a cylinder; 332. a push rod; 333. a rod seat; 334. a roller ring; 335. a roller; 4. a wire drawing jig; 41. shaping a round hole; 5. a shutdown switch.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

In this embodiment, a gold bar is taken as a material to be processed, and a finished product after processing is a gold wire.

The embodiment of the application discloses a noble metal strip wire drawing device. Referring to fig. 1, the noble metal strip wire drawing device comprises an installation frame 1, wherein the installation frame 1 comprises a frame body 11, an installation plate 12 horizontally arranged on the frame body 11 and two jig supports 13 welded and fixed at one end of the installation plate 12, the two jig supports 13 are parallel to each other and adjacently arranged oppositely, a limiting groove 131 is formed in the jig supports 13 in the vertical direction, and the two limiting grooves 131 in the two jig supports 13 are arranged oppositely; the precious metal strip wire drawing device further comprises a clamping component 2, a driving mechanism 3 and a wire drawing jig 4, wherein two ends of the wire drawing jig 4 are correspondingly inserted into the two limiting grooves 131 respectively, two rows of shaping circular holes 41 are formed in the wire drawing jig 4 along the length direction of the wire drawing jig 4, the clamping component 2 is used for clamping a gold strip to be processed, the clamping component 2 can slide along a straight line in a direction close to or far away from the wire drawing jig 4, and the driving mechanism 3 is arranged in the frame body 11 and used for driving the clamping component 2 to move; manually hammering one end of a gold bar to be processed into a cone which can penetrate through the shaping round hole 41, inserting the conical end of the gold bar to be processed into a cone from the end, far away from the clamping assembly 2, of the shaping round hole 41 and penetrating out from the end, close to the clamping assembly 2, of the clamping assembly 2, clamping and fixing the conical end of the gold bar on the clamping assembly 2 by the clamping end of the clamping assembly 2, driving the clamping assembly 2 to move towards the direction far away from the wire pulling jig 4 by the driving mechanism 3, and extruding the gold bar penetrating through the shaping round hole 41 through the hole wall of the shaping round hole 41 to enable the thick gold bar to be pressed into a thin line shape, so that the labor is saved, and the efficiency of line forming processing of the precious metal bar is improved.

Referring to fig. 1, the edges of the two end openings of the shaping circular holes 41 are in a circular arc transition shape, two rows of positioning circular holes are horizontally arranged, the shaping circular holes 41 in each row of shaping circular holes 41 are uniformly arranged at intervals, the cross-sectional area of each row of shaping circular holes 41 is sequentially increased along the arrangement direction, and the cross-sectional areas of two vertically adjacent shaping circular holes 41 in the two rows of shaping circular holes 41 are the same; by arranging the shaping circular holes 41 with various cross section areas, the gold threads with different cross section sizes can be processed on the premise of not replacing the wire drawing jig 4; and the cross-sectional areas of the upper and lower two adjacent shaping round holes 41 are the same, the clamping assembly 2 can simultaneously clamp and fix two gold bars for line forming processing, and the processing efficiency is improved.

Referring to fig. 1 and 2, a long sliding hole 14 with a rectangular cross section is formed in the mounting plate 12, the long sliding hole 14 is arranged adjacent to the jig supports 13, a central axis of the long sliding hole 14 in the length direction passes through a middle point of a connecting line of the two jig supports 13, and a straight line of the long sliding hole 14 in the length direction is perpendicular to a plane of the wire pulling jig 4; the mounting frame 1 further comprises two orientation brackets 15 welded and fixed on the bottom surface of the mounting plate 12 and orientation rods 151 with two ends respectively welded and fixed on the two orientation brackets 15, the two orientation brackets 15 are respectively arranged at the edge exits of two empty openings with smaller lengths of the long sliding hole 14, the orientation rods 151 are located below the long sliding hole 14, and the straight lines of the orientation rods 151 and the long sliding hole 14 in the length direction are parallel.

Referring to fig. 1 and 2, the clamping assembly 2 includes a sliding frame 21 slidably disposed on the orientation rod 151 and a clamp 22 disposed on the sliding frame 21, the clamp 22 being used for clamping the gold bar; the sliding frame 21 slides in the long sliding hole 14, and the side wall of the long sliding hole 14 plays a role in limiting the lateral displacement of the sliding frame 21; the upper surface of the sliding frame 21 is flush with the upper surface of the mounting plate 12, so that the height of the clamp 22 relative to the mounting plate 12 is not too high, the integral gravity center of the clamp 22 is reduced, and the stability of clamping and fixing the gold bar and performing wire drawing processing by the clamp 22 is improved.

Referring to fig. 2 and 3, the clamp 22 includes two clamp arms 221, two holding rods 222 and a spring 223, the clamp arm 221 includes a hinge portion 2211, and a clamping portion 2212 and a driving portion 2213 integrally disposed at two ends of the hinge portion 2211, respectively, the length of the driving portion 2213 is greater than that of the clamping portion 2212, the two clamp arms 221 intersect at the position of the hinge portion 2211, the two clamp arms 221 are hinged together by penetrating through the two hinge portions 2211 and the mounting plate 12 through a screw, the two clamp arms 221 are limited on the mounting plate 12, and the two clamp arms 221 can rotate around the screw; the spring 223 is arranged between the two driving portions 2213, two ends of the spring 223 are respectively fixed at one end of each of the two driving portions 2213, which is far away from the hinge portion 2211, the spring 223 has elastic potential energy which drives the two driving portions 2213 to rotate in the direction far away from each other, so that the two clamping portions 2212 can be clamped with each other, and anti-skidding grooves are formed in the clamping surfaces of the two clamping portions 2212, which are close to each other, so that the fastening performance during clamping of gold bars can be improved; the two holding rods 222 are vertically welded and fixed on one end of the driving portion 2213 far away from the hinge portion 2211, and when the two holding rods 222 are manually pressed to approach each other, the spring 223 is compressed, so that the two holding portions 2212 can be far away from each other, and the gold bar between the two holding portions 2212 can be taken out.

Referring to fig. 4 and 5, the driving mechanism 3 includes a transmission driving assembly 31, a transmission assembly 32 and a control driving assembly 33, the transmission assembly 32 includes two driven gears 321 rotatably disposed in the frame 11, a driving gear 322, an auxiliary gear 323, a transmission chain 324 and a pipe frame 325 fixedly disposed at the bottom of the frame 11, the two driven gears 321 are rotatably disposed at one end of the frame 11 close to the mounting plate 12, and a connecting line between the two driven gears 321 is parallel to the orientation rod 151 and is located right below the long sliding hole 14; a sleeve 326 with a circular cross section is fixedly arranged on the pipe frame 325, the auxiliary wheel 323 is coaxially fixed on one side surface of the driving gear 322, the sleeve 326 simultaneously and coaxially penetrates through the driving gear 322 and the auxiliary wheel 323, and the auxiliary wheel 323 and the driving wheel rotate on the sleeve 326 by arranging a bearing (not shown in the figure) between the auxiliary wheel 323 and the sleeve 326; the transmission chain 324 is engaged between the driving gear 322 and the two driven gears 321, and the sliding frame 21 is fixedly connected to the transmission chain 324 at a position between the two driven gears 321.

Referring to fig. 4 and 6, the transmission driving assembly 31 includes a driving element, a transmission rod 312, a transmission wheel 313 and a support frame 314, the driving element is a servo motor 311, the servo motor 311 is disposed adjacent to the pipe frame 325, the pipe frame 325 is disposed between the support frame 314 and the servo motor 311, the transmission rod 312 is coaxially and fixedly connected to an output end of the servo motor 311 through a reduction box and a coupling, one end of the transmission rod 312, which is far away from the servo motor 311, penetrates through the sleeve 326 and is rotatably connected to the support frame 314, the transmission wheel 313 is sleeved on the transmission rod 312 at a position between the sleeve 326 and the support frame 314, and the transmission wheel 313 is in flat key connection with the transmission rod 312 and can slide between the sleeve 326 and the support frame 314 along the length direction of the transmission rod 312; the servo motor 311 drives the transmission rod 312 to rotate, and then the transmission wheel 313 is driven to rotate.

Referring to fig. 6 and 7, a sliding groove 3131 is formed around the circumferential surface of the driving wheel 313, and a side wall of the sliding groove 3131 is perpendicular to the rotation axis of the driving wheel 313; the control driving assembly 33 comprises an air cylinder 331, a push rod 332 and a rod seat 333, the air cylinder 331 is fixed at the bottom of the frame body 11, one end of the push rod 332 is hinged at the output end of the air cylinder 331, the middle part of the push rod 332 is rotatably connected to the rod seat 333 through a bolt, a semicircular roller ring 334 is fixedly arranged at the other end of the push rod 332 integrally, two ends of the roller ring 334 are respectively rotatably provided with a roller 335, the two rollers 335 are both positioned in the sliding groove 3131, a gap is formed between the roller 335 and two side walls of the sliding groove 3131, and the rotation axis of the roller 335 is perpendicular to the rotation axis of the driving wheel 313; the cylinder 331 pushes the push rod 332 to rotate around the rod seat 333, the end of the push rod 332 located in the sliding slot 3131 moves towards the two side walls of the sliding slot 3131, and the two rollers 335 simultaneously roll and abut against the side walls of the sliding slot 3131, so as to push the driving wheel 313 to move towards or away from the sleeve 326.

Referring to fig. 4 and 6, the auxiliary gear 323 is positioned between the driving gear 322 and the driving wheel 313, and the auxiliary gear 323 and the driving wheel 313 are a pair of end-face ratchets which are matched with each other, so that the auxiliary gear 323 and the driving wheel 313 can only transmit in one direction when meshed; the servo motor 311 drives the transmission wheel 313 to rotate, the air cylinder 331 drives the push rod 332 to rotate, the push rod 332 pushes the transmission wheel 313 to move towards the direction close to the auxiliary wheel 323, so that the transmission wheel 313 is meshed with the auxiliary wheel 323 and transmits, the auxiliary wheel 323 rotates to drive the driving wheel to rotate, the driving wheel drives the transmission chain 324 meshed with the driving wheel to move, the transmission chain 324 moves to drive the clamping component 2 to move towards the direction far away from the wire pulling jig 4, when the clamping component 2 moves towards the direction close to the wire pulling jig 4, no transmission exists between the auxiliary wheel 323 and the transmission wheel 313, even if the servo motor 311 drives the transmission wheel 313 to rotate reversely due to misoperation or failure of a driving part, the clamping component 2 is not easy to move towards the direction close to the wire pulling jig 4, and further the precious metal wire which is subjected to wire forming is not easy to damage.

Referring to fig. 2 and 6, the holding assembly 2 further includes a shift lever 211 vertically and fixedly disposed at the bottom of the sliding frame 21, a stop switch 5 for controlling the cylinder 331 to open and close is fixedly disposed at the bottom of the mounting plate 12, the stop switch 5 is located at one end of the long sliding hole 14 away from the wire pulling fixture 4 and is located on a movement track of the shift lever 211, when the shift lever 211 moves to the stop switch 5, the shift lever 211 shifts the stop switch 5, the stop switch 5 controls the cylinder 331 to stop working and reset, the push rod 332 pushes the driving wheel 313 to move in a direction away from the auxiliary wheel 323, so that the driving wheel 313 is separated from the auxiliary wheel 323, the holding assembly 2 stops moving and stops pulling the gold wires, and further thinning of the finished gold wires due to an excessively long pulling time of the holding assembly 2 on the gold wires is avoided as much as possible, and quality of processing is affected.

The implementation principle of the noble metal strip wire drawing device in the embodiment of the application is as follows: one end of a gold bar to be processed is manually hammered into a cone which can penetrate through the shaping round hole 41, the conical end of the gold bar to be processed is inserted into the end, far away from the clamping component 2, of the shaping round hole 41 and penetrates out of the end, near the clamping component 2, of the clamping component 2, the conical end of the gold bar is clamped and fixed on the clamping component 2 through the clamping end of the clamping component 2, the driving mechanism 3 drives the clamping component 2 to move towards the direction far away from the wire pulling jig 4, the gold bar penetrating through the shaping round hole 41 is extruded through the hole wall of the shaping round hole 41, the thick gold bar is pressed into a thin gold wire, and the efficiency of precious metal bar processing is improved while manpower is saved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a noble metal strip guy wire device which characterized in that: the wire drawing device comprises an installation frame (1), a wire drawing jig (4) arranged on the installation frame (1), a clamping component (2) arranged on the installation frame (1) in a sliding mode and a driving mechanism (3); the clamping component (2) is used for clamping a precious metal strip, the clamping component (2) can slide towards the direction close to or away from the stay wire jig (4), the driving mechanism (3) is used for driving the clamping component (2) to slide towards the direction away from the stay wire jig (4), and a shaping round hole (41) is formed in the side face, close to the clamping component (2), of one side of the stay wire jig (4).

2. The noble metal strip pulling apparatus according to claim 1, wherein: the wire drawing jig (4) is detachably connected to the mounting frame (1).

3. The noble metal strip pulling apparatus according to claim 2, wherein: the shaping circular holes (41) are arranged in a plurality, and the shaping circular holes (41) are arranged at intervals.

4. A noble metal wire drawing device according to claim 3, wherein: the edges of the orifices at the two ends of the shaping circular hole (41) are in arc transition.

5. The noble metal strip pulling apparatus according to claim 1, wherein: the clamping component (2) is rotatably arranged on the mounting rack (1).

6. The noble metal strip pulling apparatus according to claim 1, wherein: be provided with shutdown switch (5) on mounting bracket (1), shutdown switch (5) set up on the movement track of centre gripping subassembly (2), centre gripping subassembly (2) are located shutdown switch (5) with between wire drawing tool (4), shutdown switch (5) with actuating mechanism (3) electricity is connected, shutdown switch (5) are used for controlling actuating mechanism (3) stop work.

7. The noble metal strip pulling apparatus according to claim 1, wherein: the driving mechanism (3) comprises a transmission driving assembly (31), a transmission assembly (32) and a control driving assembly (33), wherein the transmission assembly (32) comprises a driving gear (322) rotatably arranged on the mounting rack (1), a plurality of driven gears (321) rotatably arranged on the mounting rack (1), an auxiliary wheel (323) coaxially and fixedly connected with the driving gear (322) and a transmission chain (324) connected with the clamping assembly (2); the transmission chain (324) is sleeved between the driving gear (322) and the driven gears (321) and is simultaneously meshed with the driving gear (322) and the driven gears (321);

the transmission driving assembly (31) comprises a transmission driving piece and a transmission wheel (313) which are arranged on the mounting frame (1), the transmission driving piece is used for driving the transmission wheel (313) to rotate, the transmission wheel (313) is arranged adjacent to the driving gear (322), the auxiliary wheel (323) is arranged between the transmission wheel (313) and the driving gear (322), the transmission wheel (313) is used for being meshed with the auxiliary wheel (323), and the transmission wheel (313) can move towards or away from the driving gear (322); the control driving assembly (33) is used for driving the driving wheel (313) to move towards or away from the driving gear (322).

8. The noble metal strip pulling apparatus according to claim 7, wherein: the auxiliary wheel (323) is a ratchet wheel, ratchets on the auxiliary wheel (323) are arranged on the side surface close to one side of the driving wheel (313), and the auxiliary wheel (323) is in one-way transmission with the driving wheel (313); when the clamping component (2) moves towards the direction close to the wire pulling jig (4), the auxiliary wheel (323) and the transmission wheel (313) are not in transmission with each other.