CN116092856A - Electric switch assembly quality - Google Patents
Electric switch assembly quality Download PDFInfo
- Publication number
- CN116092856A CN116092856A CN202310371803.7A CN202310371803A CN116092856A CN 116092856 A CN116092856 A CN 116092856A CN 202310371803 A CN202310371803 A CN 202310371803A CN 116092856 A CN116092856 A CN 116092856A
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- assembly
- block
- sliding
- plate
- switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier
- H01H2011/067—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier by deforming, e.g. bending, folding or caulking, part of the contact or terminal which is being mounted
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention discloses an electric switch assembly device, which relates to the field of electric switch accessory assembly and solves the problem that the conventional auxiliary switch assembly device is inconvenient in actual operation.
Description
Technical Field
The invention relates to the field of electric switch accessory assembly, in particular to an electric switch assembly device.
Background
The electric switch is a device for switching on and off electric power between equipment or between lines in an electric power system, and in the existing assembly production process of parts of the electric switch, most parts are assembled through automatic equipment, but fewer assembly steps need manual operation treatment;
the prior art disclosed in the Chinese patent publication No. CN110744490A discloses an isolating switch contact finger assembling device which is used for assisting the assembly of a high-voltage isolating switch contact finger and a contact finger rack, when the high-voltage isolating switch contact finger is assembled with the contact finger rack, the isolating switch contact finger assembling device is firstly placed between two contact fingers of the high-voltage isolating switch contact finger, the two pressing plates prop the two contact fingers by rotating a screw rod, and after the two contact fingers are propped up to a certain distance, the contact finger rack is assembled, so that the assembling difficulty is greatly reduced, the assembling efficiency is improved, the occurrence of safety production accidents is effectively controlled, and the device has the advantages of simple structure, high reliability, simplicity in operation, small size, flexibility, convenience in carrying and the like;
in the assembly device in the above technology, after the device is integrally placed between two contact fingers by a worker in the actual use process, the device is integrally held by one hand, the whole position of the device is kept, and the other hand rotates the screw rod to enable the two pressing plates to prop the contact fingers open, so that the volume of the disconnecting link switch of the high-voltage isolating switch is not large, and in the installation process of the contact finger rack, although the operation process is more labor-saving compared with the process of directly bending the contact fingers by hands, the operation process is not very convenient, and the reaction force applied to the pressing plates by the contact fingers in the process of bending the contact fingers is prevented from causing the whole deviation of the assembly device.
Disclosure of Invention
The invention aims to provide an electric switch assembly device which is convenient and fast to assemble in an auxiliary manner and has high stability, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the electric switch assembly device comprises a switch knife switch and two groups of symmetrically distributed elastic contact fingers which are arranged on the inner side of the switch knife switch through bolts and springs, wherein a contact finger frame is also arranged on the inner side of the switch knife switch in a sliding manner, an assembly plate is arranged on the top of the switch knife switch, a clamping block is fixedly arranged at the rear end of the assembly plate, the assembly plate and the clamping block are in sliding connection with the upper end part of the switch knife switch in a sliding manner, a first frame plate and a second frame plate are fixedly arranged at the front end of the assembly plate, and an opening and closing assembly is arranged between the first frame plate and the second frame plate; the opening and closing assembly comprises a sliding guide block fixedly arranged at the upper part of the second frame plate, arc plates are arranged on the left side and the right side of the sliding guide block in a sliding mode, a jack post is fixedly arranged at the bottom of each arc plate, arc racks are fixedly arranged on the inner sides of the two arc plates, and a pressing assembly is arranged at the upper part of the opening and closing assembly;
the pressing assembly comprises a sliding rod which is inserted into the sliding guide block in a sliding manner, a pressing block is fixedly sleeved on the outer surface of the sliding rod, and the lower end face of the pressing block is in sliding fit with the tops of the two arc plates;
when the sliding rod slides downwards along the sliding guide block, the pressing block drives the two arc plates to open and close, and the two arc plates Zhang Geyong control the two elastic contact fingers to open and close.
Preferably, a bottom support block is fixedly arranged at the bottom of the sliding rod, and a tension spring is fixedly arranged between the upper part of the bottom support block and the bottom of the second frame plate.
Preferably, the assembly is used for stirring the sliding rod, the stirring assembly comprises a stirring plate which is embedded in the assembly plate in a sliding manner, a rotating shaft which is inserted in the assembly plate in a rotating manner is fixedly arranged in the stirring plate, a baffle is arranged on the front end face of the assembly plate through a bolt, and a connecting piece is arranged between the bottom of the stirring plate and the top of the sliding rod.
Preferably, the connecting piece comprises a roller frame fixedly mounted at the upper end of the frame plate, a rotating sleeve block is sleeved on the upper portion of the sliding rod in a sliding manner, a guy cable is fixedly mounted between the rotating sleeve block and the bottom of the shifting plate, and the guy cable is in sliding contact with the bottom of an inner pulley of the roller frame.
Preferably, the inner side of the assembly plate is further provided with a tightening assembly, the tightening assembly comprises a lower slider which is slidably mounted in the assembly plate, the lower slider is far away from one end of the first frame plate and slidably penetrates through the assembly plate, one end of the first frame plate, which is far away from, of the lower slider is fixedly provided with a brake pad, the rear end horizontal plane of the assembly plate is located at the rear of the rear end horizontal plane of the brake pad, a sliding plate is slidably mounted in the lower slider, two ends of the sliding plate are fixedly connected with the assembly plate, a first spring is arranged at the front end of the sliding plate, and a touch assembly is arranged between the upper portion of the lower slider and the rotating shaft.
Preferably, the touch assembly comprises an upper sliding block and a connecting block which are positioned above the lower sliding block, the upper sliding block and the connecting block are both in sliding connection with the inside of the assembly plate, the inclined surface at the bottom of the upper sliding block is in sliding fit with the inclined surface at the upper part of the lower sliding block, a spring II is fixedly arranged between the upper sliding block and the connecting block, a supporting block is fixedly arranged outside the rotating shaft, and the supporting block is in sliding fit with the connecting block.
Preferably, the brake pad is made of rubber material.
Preferably, a triangular groove is formed in the top of the switch knife switch, and a chamfer block which is embedded with the triangular groove is fixedly arranged at the bottom of the clamping block.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the leverage of the poking plate and the rotating shaft, the pressing component can be touched through the inhaul cable with smaller force, the two arc plates are synchronously unfolded and slid downwards, the jack posts push the elastic contact fingers, the two elastic contact fingers are unfolded, the contact finger rack can be mounted, and the tightening component can be touched through the touching component in the poking process of the poking plate, so that the stability between the switch knife gate and the assembly plate can be ensured when the poking plate rotates;
2. according to the invention, through the assembly of the triangular groove at the top of the switch knife and the triangular block at the bottom of the clamping block, a positioning effect can be achieved when the switch knife and the clamping block are just contacted;
3. according to the invention, the brake pad made of rubber is designed, so that the more the downward pushing force of the top part of the lower sliding block is, the more closely the brake pad contacts with the switch knife switch, and the brake pad can deform after receiving larger extrusion force, so that the friction force between the switch knife switch and the assembly plate is increased.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of the arc plate and arc rack of the present invention;
FIG. 4 is a schematic view of the mating structure of the sliding guide block and the arc plate of the present invention;
FIG. 5 is a schematic view of the swivel block, cable and dial plate structure of the present invention;
FIG. 6 is an enlarged view of FIG. 5A in accordance with the present invention;
fig. 7 is a schematic view of the structure of the chamfer block and the triangular groove of the present invention.
In the figure: 1. a switch knife switch; 2. an elastic contact finger; 3. a finger rest; 4. an assembly plate; 5. clamping blocks; 6. a first frame plate; 7. an opening and closing assembly; 8. a pressing assembly; 9. the assembly is stirred; 10. a tightening assembly; 11. a touch assembly; 12. a second frame plate; 13. a roller frame; 14. a sliding guide block; 15. an arc plate; 16. a top column; 17. an arc-shaped rack; 18. a slide bar; 19. a bottom support block; 20. a tension spring; 21. briquetting; 22. a rotating sleeve block; 23. a guy cable; 24. a poking plate; 25. a rotating shaft; 26. a baffle; 27. a lower slide block; 28. a brake pad; 29. a slide plate; 30. a first spring; 31. an upper slider; 32. a connecting block; 33. a second spring; 34. abutting blocks; 35. chamfering triangular blocks; 36. triangular grooves.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 and 3, an electric switch assembly device in the drawings comprises a switch knife 1 and two groups of symmetrically distributed elastic contact fingers 2 which are arranged on the inner side of the switch knife 1 through bolts and springs, wherein a contact finger frame 3 is also arranged on the inner side of the switch knife 1 in a sliding manner, an assembly plate 4 is arranged on the top of the switch knife 1, a clamping block 5 is fixedly arranged at the rear end of the assembly plate 4, the assembly plate 4 and the clamping block 5 are in sliding connection with the upper end part of the switch knife 1, a first frame plate 6 and a second frame plate 12 are fixedly arranged at the front end of the assembly plate 4, the first frame plate 6 is positioned on the upper part of the second frame plate 12, and a reinforcing block is fixedly arranged between the first frame plate and the second frame plate; the opening and closing assembly 7 is used for pushing and flattening the two symmetrically distributed elastic contact fingers 2, the opening and closing assembly 7 is arranged between the first frame plate 6 and the second frame plate 12, and the pressing assembly 8 is arranged at the upper part of the opening and closing assembly 7; the poking component 9 is arranged in the assembly plate 4, and the poking component 9 is touched by the pressing component 8.
Referring to fig. 2-4, the opening and closing assembly 7 in the drawings includes a sliding guide block 14 fixedly mounted on the upper portion of the frame plate two 12, two arc plates 15 are slidably disposed on the left and right sides of the sliding guide block 14 corresponding to opposite directions of the two elastic contact fingers 2, a jack post 16 is fixedly mounted at the bottom of each arc plate 15, the jack posts 16 at the bottoms of the two arc plates 15 can directly contact with the outer portions of the elastic contact fingers 2 in the unfolded state, arc racks 17 are fixedly mounted on opposite sides of the two arc plates 15, the two arc racks 17 are movably engaged, and the two arc racks 17 engaged with each other can enable the two arc plates 15 to synchronously and reversely move.
Referring to fig. 3, in the illustration, the pressing component 8 includes a sliding rod 18 slidably inserted into the second frame plate 12 and the sliding guide block 14, a bottom support block 19 is fixedly installed at the bottom of the sliding rod 18, a tension spring 20 is fixedly arranged between the upper portion of the bottom support block 19 and the bottom of the second frame plate 12, the action of the tension spring 20 can always keep the sliding rod 18 in an extended state, a pressing block 21 is fixedly sleeved on the outer surface of the sliding rod 18, and the lower end surfaces of the pressing blocks 21 are slidably attached to the tops of the two arc plates 15.
Referring to fig. 3 and 4, in the drawings, the toggle assembly 9 includes a toggle plate 24 slidably embedded in the assembly plate 4, a rotating shaft 25 rotatably inserted in the assembly plate 4 is fixedly installed in the toggle plate 24, a baffle 26 is installed on the front end surface of the assembly plate 4 through a bolt, and a connecting piece is arranged between the bottom of the toggle plate 24 and the top of the slide rod 18 for limiting the maximum angle of forward rotation of the toggle plate 24.
Referring to fig. 4, the connecting piece in the illustration includes a roller frame 13 fixedly mounted at the upper end of a frame plate 6, a rotating sleeve block 22 is sleeved on the upper portion of a sliding rod 18 in a sliding manner, a guy cable 23 is fixedly mounted between the rotating sleeve block 22 and the bottom of a pulling plate 24, the pulling plate 24 can move the position of the sliding rod 18 through the guy cable 23 when swinging, the guy cable 23 is in sliding contact with the bottom of an inner pulley of the roller frame 13, and the roller frame 13 plays a guiding role on the guy cable 23.
Auxiliary assembly is convenient theory of operation: when the finger rest 3 is installed, a worker clamps the assembly plate 4 and the clamping blocks 5 on the upper part of the switch knife 1, after the clamping is completed, the two elastic contact fingers 2 in the switch knife 1 can move the arc plate 15 upwards through the jacking columns 16, at the moment, the upper part of the poking plate 24 is poked forwards by the user, the bottom of the poking plate 24 can be pulled to the rotating sleeve block 22 through the guy cable 23 in the poking process, so that the sliding rod 18 slides downwards, the tension spring 20 is stretched, the sliding rod 18 can press the arc plates 15 which are symmetrically distributed downwards in the sliding process of the sliding rod 18 with the pressing blocks 21, the distance between the bottoms of the two elastic contact fingers 2 is enlarged through the jacking columns 16, at the moment, the user can directly slide the finger rest 3 upwards, and after the poking plate 24 is loosened, the elastic contact fingers 2 are not pressed, the bottom of the elastic contact fingers 2 can reset to clamp the top protrusions of the finger rest 3;
it should be noted that, the pulling plate 24 is rotated by the rotating shaft 25 to spread the two elastic contact fingers 2, so that the two elastic contact fingers 2 are easily spread by a small force according to the lever principle, and the pulling plate can be operated by one hand, and the other hand can be used for directly installing the contact finger rack 3.
Example 2
Referring to fig. 5, in this embodiment, for further explanation of example 1, the inner side of the mounting plate 4 is further provided with a tightening assembly 10, the tightening assembly 10 includes a lower slider 27 slidably mounted inside the mounting plate 4, one end of the lower slider 27 away from the first frame plate 6 is slidably penetrated through the mounting plate 4, one end of the lower slider 27 away from the first frame plate 6 is fixedly mounted with a brake pad 28, the rear horizontal plane of the mounting plate 4 is located behind the rear horizontal plane of the brake pad 28, a sliding plate 29 is slidably embedded inside the lower slider 27, two ends of the sliding plate 29 are fixedly connected with the mounting plate 4, a first spring 30 is disposed at the front end of the sliding plate 29, the first spring 30 can ensure that the lower slider 27 cannot slide under the action of external force, and a touch assembly 11 is disposed between the upper portion of the lower slider 27 and the rotating shaft 25.
Referring to fig. 6, the touch assembly 11 in the drawing includes an upper slider 31 and a connecting block 32 above a lower slider 27, wherein the upper slider 31 and the connecting block 32 are slidably inserted into the assembly plate 4, a bottom inclined surface of the upper slider 31 is slidably attached to an upper inclined surface of the lower slider 27, a second spring 33 is fixedly installed between the upper slider 31 and the connecting block 32, wherein the stiffness of the second spring 33 is greater than that of the first spring 30, an abutting block 34 is fixedly installed on the outer portion of the rotating shaft 25, and the abutting block 34 is slidably attached to the connecting block 32.
Referring to fig. 6, the brake pad 28 is made of rubber, and the brake pad 28 made of rubber has high friction and a certain deformation capability.
In the invention, the following components are added: the pulling plate 24 can push the connecting block 32 through the supporting block 34 in the rotating process of the rotating shaft 25, so that the second spring 33 is compressed, the second spring 33 applies pressure to the upper sliding block 31, so that the second spring pushes the lower sliding block 27, the lower sliding block 27 slides backwards, the braking pad 28 is attached to the surface of the switch knife 1, the larger the rotating angle of the rotating shaft 25 is, the larger the displacement amount of the supporting block 34 pushing the connecting block 32 is, the more tightly the braking pad 28 is attached to the surface of the switch knife 1, and the stability between the assembly plate 4 and the switch knife 1 can be ensured when the pulling plate 24 rotates.
Example 3
Referring to fig. 7, this embodiment further illustrates other embodiments, in which the top of the switch 1 is provided with a triangular groove 36, and the bottom of the clamping block 5 is fixedly provided with an inverted triangular block 35 engaged with the triangular groove 36.
In the invention, the following components are added: through the gomphosis of the inverted triangle 35 and the triangle groove 36, the positioning function can be achieved between the assembly plate 4 and the switch knife 1, and the assembly plate 4 can be conveniently and rapidly placed at a proper position.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An electric switch assembly device comprises a switch knife switch (1) and two groups of symmetrically distributed elastic contact fingers (2) which are arranged on the inner side of the switch knife switch (1) through bolts and springs, wherein a contact finger frame (3) is also arranged on the inner side of the switch knife switch (1) in a sliding manner, an assembly plate (4) is arranged on the top of the switch knife switch (1), and the rear end of the assembly plate (4) is fixedly provided with a clamping block (5), the assembly plate (4) and the clamping block (5) are in sliding connection with the upper end part of the switch knife switch (1), and the front end of the assembly plate (4) is fixedly provided with a first frame plate (6) and a second frame plate (12), and is characterized in that: the folding assembly (7) is arranged between the first frame plate (6) and the second frame plate (12); the opening and closing assembly (7) comprises sliding guide blocks (14) fixedly mounted on the upper parts of the second frame plates (12), arc plates (15) are slidably arranged on the left side and the right side of the sliding guide blocks (14), jacking columns (16) are fixedly mounted at the bottoms of the arc plates (15), arc racks (17) are fixedly mounted on the inner sides of the two arc plates (15), and a pressing assembly (8) is arranged on the upper parts of the opening and closing assemblies (7);
the pressing assembly (8) comprises a sliding rod (18) which is inserted into the sliding guide block (14) in a sliding manner, a pressing block (21) is fixedly sleeved on the outer surface of the sliding rod (18), and the lower end surface of the pressing block (21) is in sliding fit with the tops of the two arc plates (15);
when the sliding rod (18) slides downwards along the sliding guide block (14), the pressing block (21) drives the two arc plates (15) to open and close, and the two arc plates (15) are used for controlling the two elastic contact fingers (2) to open and close.
2. An electrical switch assembly as defined in claim 1 wherein: the bottom of the sliding rod (18) is fixedly provided with a bottom support block (19), and a tension spring (20) is fixedly arranged between the upper part of the bottom support block (19) and the bottom of the second frame plate (12).
3. An electrical switch assembly as defined in claim 1 wherein: the assembly is characterized by further comprising a stirring assembly (9) for stirring the sliding rod (18), the stirring assembly (9) comprises a stirring plate (24) which is embedded in the assembly plate (4) in a sliding manner, a rotating shaft (25) which is inserted in the assembly plate (4) in a rotating manner is fixedly arranged in the stirring plate (24), a baffle (26) is arranged on the front end surface of the assembly plate (4) through a bolt, and a connecting piece is arranged between the bottom of the stirring plate (24) and the top of the sliding rod (18).
4. An electrical switch assembly as defined in claim 3 wherein: the connecting piece comprises a roller frame (13) fixedly arranged at the upper end of the first frame plate (6), a rotating sleeve block (22) is sleeved on the upper portion of the sliding rod (18) in a sliding mode, a guy cable (23) is fixedly arranged between the rotating sleeve block (22) and the bottom of the shifting plate (24), and the guy cable (23) is in sliding contact with the bottom of an inner pulley of the roller frame (13).
5. An electrical switch assembly as defined in claim 3 wherein: the inside of assembly board (4) still is equipped with and props tight subassembly (10), prop tight subassembly (10) including slidable mounting in inside slider (27) of assembly board (4), just slider (27) keep away from the one end slip of frame plate one (6) run through in assembly board (4), slider (27) keep away from one end fixed mounting of frame plate one (6) has brake pad (28), just the rear end horizontal plane of assembly board (4) is located the rear of brake pad (28) rear end horizontal plane, slider (29) have been inlayed in the inside slip of slider (27), just slider (29) both ends with assembly board (4) are fixed connection, the front end of slider (29) is equipped with spring one (30), be equipped with between the upper portion of slider (27) with between pivot (25) touch subassembly (11).
6. An electrical switch assembly as defined in claim 5 wherein: the touch assembly (11) comprises an upper sliding block (31) and a connecting block (32) which are arranged above the lower sliding block (27), the upper sliding block (31) and the connecting block (32) are both in sliding connection with the inside of the assembly plate (4), the inclined surface at the bottom of the upper sliding block (31) is in sliding fit with the inclined surface at the upper part of the lower sliding block (27), a spring II (33) is fixedly arranged between the upper sliding block (31) and the connecting block (32), a supporting block (34) is fixedly arranged outside the rotating shaft (25), and the supporting block (34) is in sliding fit with the connecting block (32).
7. An electrical switch assembly as defined in claim 5 wherein: the brake pad (28) is made of rubber material.
8. An electrical switch assembly as defined in claim 1 wherein: triangular grooves (36) are formed in the top of the switch knife switch (1), and inverted triangular blocks (35) embedded with the triangular grooves (36) are fixedly arranged at the bottoms of the clamping blocks (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371803.7A CN116092856B (en) | 2023-04-10 | 2023-04-10 | Electric switch assembly quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371803.7A CN116092856B (en) | 2023-04-10 | 2023-04-10 | Electric switch assembly quality |
Publications (2)
| Publication Number | Publication Date |
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| CN116092856A true CN116092856A (en) | 2023-05-09 |
| CN116092856B CN116092856B (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310371803.7A Active CN116092856B (en) | 2023-04-10 | 2023-04-10 | Electric switch assembly quality |
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| CN (1) | CN116092856B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117020629A (en) * | 2023-10-10 | 2023-11-10 | 广州市方连科技有限公司 | Center shaft press-fitting equipment for bicycle production |
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| CN213303953U (en) * | 2020-11-18 | 2021-05-28 | 内蒙古华电乌达热电有限公司 | Isolator touches finger spring assembly device |
| CN216353922U (en) * | 2021-11-10 | 2022-04-19 | 山东泰开隔离开关有限公司 | Switching bus current conversion device of high-voltage isolating switch |
| CN216799881U (en) * | 2022-03-11 | 2022-06-24 | 河南师范大学 | Auxiliary tool for solution uniform-speed dripping device |
| CN115547732A (en) * | 2022-09-13 | 2022-12-30 | 广东电网有限责任公司广州供电局 | Technical improved isolation switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117020629A (en) * | 2023-10-10 | 2023-11-10 | 广州市方连科技有限公司 | Center shaft press-fitting equipment for bicycle production |
| CN117020629B (en) * | 2023-10-10 | 2023-12-29 | 广州市方连科技有限公司 | Center shaft press-fitting equipment for bicycle production |
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