Multi-station clamp

Abstract

The invention relates to a multi-station clamp which comprises a base and two clamping tables rotationally installed on the top face of the base, a driving motor is installed at the bottom of the base, a transmission mechanism is arranged in the base, and the two clamping tables are connected with a driving part through the transmission mechanism. The transmission mechanism drives the two clamping tables to rotate synchronously in the same direction or one of the clamping tables to rotate independently according to different rotating directions of the driving motor. According to the technical scheme, the transmission mechanism converts the output form according to the rotating direction of the driving motor so as to synchronously drive the two clamping tables to rotate synchronously or only drive one clamping table to rotate independently, and therefore the multi-station clamp can achieve multi-station synchronous rotation control and single-station rotation control by using one driving motor as a power source.

Description

Technical Field

[0001] The present invention relates to the technical field of clamps, and in particular to a multi-station clamp. Background Art

[0002] A fixture is a general term for a device used in the machining industry to clamp and fix the workpiece being processed.

[0003] According to the clamping capacity, it can be divided into two types: single-station clamp and multi-station clamp;

[0004] When the workpiece needs to change the processing angle during the processing, the single-station fixture can realize the rotation angle through a drive motor, while the multi-station fixture needs to set a drive motor for each station, which can control each station individually to adjust the processing angle of the station, and can also control multiple drive motors synchronously to realize synchronous rotation of multiple stations. However, the use of multiple drive motors will inevitably increase the manufacturing cost of the equipment, and the synchronous control of multiple drive motors will also increase the complexity of the control system;

[0005] For example, if a driving motor is used to drive multiple workstations to rotate synchronously through a transmission mechanism, multiple workstations can rotate synchronously, but it is impossible to control one of the workstations to rotate alone;

[0006] To this end, the inventors have improved the transmission equipment and developed a device using the one-way meshing principle that uses a drive motor as a power source and realizes multi-station synchronous rotation and single-station rotation control by controlling the rotation direction of the drive motor. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a multi-station clamp to solve the problem in the prior art that the multi-station clamp uses one drive motor as a power source and cannot achieve both multi-station synchronous rotation and single-station rotation control.

[0008] The present invention is achieved through the following technical solutions:

[0009] A multi-station clamp comprises a base and two clamping tables rotatably mounted on the top surface of the base, a driving motor is mounted on the bottom of the base, a transmission mechanism is arranged inside the base, the two clamping tables are connected to a driving part via the transmission mechanism, and the transmission mechanism drives the two clamping tables to rotate synchronously in the same direction or one of the clamping tables to rotate alone according to the different rotation directions of the driving motor.

[0010] It is further defined that the transmission mechanism comprises a first driving gear and a second driving gear which are coaxially arranged, the first driving gear and the second driving gear are both sleeved outside the output shaft of the driving motor, and a first one-way meshing component and a second one-way meshing component are respectively arranged between the first driving gear and the output shaft of the driving motor, and the meshing directions of the first one-way meshing component and the second one-way meshing component are opposite;

[0011] The two clamping platforms are coaxially connected with driven gears, and the two driven gears are respectively meshed with the two sides of the first driving gear; the second driving gear is meshed with an intermediate gear, and the intermediate gear is located on one side of the line connecting the rotation centers of the two driven gears. The intermediate gear is slidably fitted on the base and can approach any driven gear by sliding.

[0012] It is further defined that the first one-way meshing assembly includes a first gear ring coaxially arranged with the first driving gear and a first rotating wheel rotatably matched in the first gear ring, a wheel surface of the first rotating wheel is provided with a plurality of first sliding holes extending toward the center, a first locking pin is slidably connected in the sliding hole, a first supporting spring is arranged between one end of the first locking pin and the bottom of the first sliding hole, and the other end of the first locking pin is kept extending out of the first sliding hole under the action of the first supporting spring;

[0013] The second one-way meshing assembly includes a second gear ring coaxially arranged with the second driving gear and a second rotating wheel rotatably matched with the second gear ring, a wheel surface of the second rotating wheel is provided with a plurality of second sliding holes extending toward the center, a second locking pin is slidably connected in the sliding hole, a second supporting spring is arranged between one end of the second locking pin and the bottom of the second sliding hole, and the other end of the second locking pin is kept extending out of the second sliding hole under the action of the second supporting spring;

[0014] One end of the first locking pin extending out of the first sliding hole is provided with a first helical tooth meshing with the first gear ring, and one end of the second locking pin extending out of the second sliding hole is provided with a second helical tooth meshing with the second gear ring, and the tips of the first helical tooth and the second helical tooth are inclined in opposite directions.

[0015] It is further defined that the top surface of the base is provided with a first arc-shaped slide groove, and the top surface is provided with a second arc-shaped slide groove, and the centers of the first arc-shaped slide groove and the second arc-shaped slide groove are located on the axis of the output shaft of the driving motor;

[0016] The top surface of the intermediate gear is connected to a first sliding support portion, the bottom surface is connected to a second sliding support portion, and the intermediate gear is slidably connected to the first arc-shaped sliding groove and the second arc-shaped sliding groove through the first sliding support portion and the second sliding support portion respectively.

[0017] It is further defined that the intermediate gear is provided with an axle, and two ends of the axle extend out of the top surface and the bottom surface of the intermediate gear respectively;

[0018] The upper end of the wheel shaft extends upward to form a first sliding support portion that slides in the first arc-shaped sliding groove;

[0019] The second sliding support portion includes a connecting plate, the center of which is rotatably connected to the lower end of the wheel axle, and the bottom surfaces of both ends of the connecting plate are connected to downwardly protruding pins, and the two pins are slidably matched in the second arc-shaped sliding groove;

[0020] The upper end of the wheel shaft and the two latches are sleeved with bearings.

[0021] It is further defined that the top surface of the intermediate gear is connected to a first friction disk, and the top surfaces of the two driven gears are fixedly connected to second friction disks;

[0022] The first friction plate and the second friction plate are coaxially arranged with the intermediate gear and the driven gear respectively, and the first friction plate and the second friction plate are located on the same plane.

[0023] It is further defined that a positioning column is provided on the base, and a line connecting the positioning column and the output shaft of the driving motor intersects perpendicularly with a line connecting the rotation centers of the two driven gears;

[0024] An elastic connecting piece is arranged between the positioning column and the upper end of the wheel shaft, and the intermediate gear is kept separated from the two driven gears under the action of the elastic connecting piece.

[0025] It is further defined that a rotating wheel is rotatably matched outside the positioning column, a rotating ring is rotatably matched outside the wheel shaft, and the elastic connecting member is an annular structure wound around the rotating wheel and the rotating ring.

[0026] It is further defined that a pressure plate is disposed on the outer side of each of the two driven gears, a friction plate is connected to the side of the pressure plate facing the driven gear, and a connecting rod is connected to the side facing away from the driven gear;

[0027] The base is connected with a sleeve which is sleeved outside the connecting rod, and a screw is threadedly fitted inside the outer end of the sleeve. A third supporting spring is arranged between the end of the screw and the end of the connecting rod, and under the action of the third supporting spring, the friction plate remains in a state of being in contact with the driven gear.

[0028] It is further defined that a friction ring is provided on the driven gear, and the friction ring is fixedly connected to the driven gear.

[0029] The beneficial effects of the present invention are:

[0030] The multi-station clamp has a transmission mechanism that converts the output form according to the rotation direction of the driving motor to achieve synchronous driving of two clamping tables to rotate synchronously or to drive only one of the clamping tables to rotate separately, so that the multi-station clamp uses one driving motor as a power source to achieve two types of control: multi-station synchronous rotation and single-station rotation.

[0031] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The three-dimensional Figure 1 ;

[0033] Figure 2 The three-dimensional Figure 2 ;

[0034] Figure 3 A top view of the present invention;

[0035] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0036] Figure 5 for Figure 4 Enlarged view of middle C;

[0037] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB;

[0038] Figure 7 for Figure 6 Enlarged view of middle D;

[0039] Figure 8 It is a schematic diagram of the internal structure of the present invention;

[0040] Fig. 9 A schematic diagram of the matching structure of the first driving gear and the second driving gear;

[0041] Fig.10 A schematic diagram of the matching structure of the first rotating wheel and the second rotating wheel;

[0042] Fig.11 It is a schematic diagram of the matching structure of the intermediate gear and the elastic connecting piece;

[0043] In the figure: 1, base; 2, clamping table; 3, driving motor; 4, first driving gear; 5, second driving gear; 6, driven gear; 7, first gear ring; 8, first rotating wheel; 9, first sliding hole; 10, first locking pin; 11, first supporting spring; 12, first helical tooth; 13, second gear ring; 14, second rotating wheel; 15, second sliding hole; 16, second locking pin; 17, second supporting spring; 18, second helical tooth; 19, first arcuate slide groove; 20, second arcuate slide groove; 21, connecting plate; 22, latch; 23, first friction disc; 24, second friction disc; 25, positioning column; 26, elastic connecting member; 27, rotating wheel; 28, supporting ring; 29, pressing plate; 30, friction plate; 31, gasket; 32, sleeve; 33, third supporting spring; 34, screw; 35, friction ring; 36, intermediate gear. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0049] See also Figure 1-11 The present invention provides a technical solution: a multi-station clamp, comprising a base 1 and two clamping tables 2 rotatably installed on the top surface of the base 1, a driving motor 3 is installed at the bottom of the base 1, a transmission mechanism is arranged in the base 1, the two clamping tables 2 are connected to the driving part through the transmission mechanism, and the transmission mechanism drives the two clamping tables 2 to rotate synchronously in the same direction or one of the clamping tables 2 rotates alone according to the different rotation directions of the driving motor 3.

[0050] The two clamping tables 2 serve as workstations for installing and fixing workpiece tools, and are rotatably installed on the base 1. The driving motor 3 serves as a power source, and the transmission mechanism is used to transmit the power of the driving motor 3 to the two clamping tables 2, so as to drive the two clamping tables 2 to rotate through the driving motor 3; the transmission mechanism can convert the output form according to the rotation direction of the driving motor 3, so as to achieve synchronous driving of the two clamping tables 2 to rotate synchronously or only drive one of the clamping tables 2 to rotate separately, so as to realize the multi-station fixture using one driving motor 3 as a power source to achieve two types of control: multi-station synchronous rotation and single-station rotation.

[0051] In this embodiment, the transmission mechanism includes a first driving gear 4 and a second driving gear 5 which are coaxially arranged. The first driving gear 4 and the second driving gear 5 are both sleeved outside the output shaft of the driving motor 3, and a first one-way meshing component and a second one-way meshing component are respectively arranged between the output shaft of the driving motor 3, and the meshing directions of the first one-way meshing component and the second one-way meshing component are opposite.

[0052] The two clamping tables 2 are coaxially connected with driven gears 6, and the two driven gears 6 are respectively meshed with the two sides of the first driving gear 4; the second driving gear 5 is meshed with an intermediate gear 36, and the intermediate gear 36 is located on one side of the line connecting the rotation centers of the two driven gears 6. The intermediate gear 36 is slidably fitted on the base 1 and can approach any driven gear 6 by sliding.

[0053] The first driving gear 4 and the second driving gear 5 are both mounted on the output shaft of the driving motor 3, and are respectively connected in transmission through the first one-way meshing component and the second one-way meshing component. The meshing directions of the first one-way meshing component and the second one-way meshing component are opposite, that is, the driving motor 3 can only drive the first driving gear 4 and the second driving gear 5 to rotate when rotating in the forward direction or reverse direction;

[0054] When the first driving gear 4 is driven to rotate, the first driving gear 4 will drive the two driven gears 6 to rotate;

[0055] When the second driving gear 5 is driven to rotate, the second driving gear 5 will drive the intermediate gear 36 to rotate. Since the intermediate gear 36 can slide on the base 1 and approach any one of the driven gears 6, while keeping the intermediate gear 36 in meshing state with the second driving gear 5, the intermediate gear 36 is pushed to mesh with any one of the driven gears 6 to drive one of the clamping tables 2 to rotate.

[0056] Specifically: when the driving direction of the first one-way meshing component is counterclockwise, that is, when the output shaft of the driving motor 3 rotates counterclockwise, it can drive the first driving gear 4 to rotate, and when the first driving gear 4 rotates clockwise, it will not be affected by the rotation of the output shaft of the driving motor 3;

[0057] As mentioned above, the driving direction of the second one-way meshing component will be clockwise, that is, when the output shaft of the driving motor 3 rotates clockwise, it will push the second driving gear 5 to rotate counterclockwise. When the second driving gear 5 is engaged with one of the driven gears 6, it will push the driven gear 6 to rotate clockwise.

[0058] In this embodiment, the first one-way meshing assembly includes a first gear ring 7 coaxially arranged with the first driving gear 4 and a first rotating wheel 278 rotatably matched in the first gear ring 7, a wheel surface of the first rotating wheel 278 is provided with a plurality of first sliding holes 9 extending toward the center, a first locking pin 10 is slidably connected in the sliding hole, a first supporting spring 11 is arranged between one end of the first locking pin 10 and the bottom of the first sliding hole 9, and the other end of the first locking pin 10 is kept extending out of the first sliding hole 9 under the action of the first supporting spring 11;

[0059] The second one-way meshing assembly comprises a second gear ring 13 coaxially arranged with the second driving gear 5 and a second rotating wheel 2714 rotatably fitted in the second gear ring 13, a wheel surface of the second rotating wheel 2714 is provided with a plurality of second sliding holes 15 extending toward the center, a second locking pin 16 is slidably connected in the sliding hole, a second supporting spring 17 is arranged between one end of the second locking pin 16 and the bottom of the second sliding hole 15, and the other end of the second locking pin 16 is kept extending out of the second sliding hole 15 under the action of the second supporting spring 17;

[0060] One end of the first locking pin 10 extending out of the first sliding hole 9 is provided with a first bevel tooth 12 meshing with the first gear ring 7, and one end of the second locking pin 16 extending out of the second sliding hole 15 is provided with a second bevel tooth 18 meshing with the second gear ring 13, and the tips of the first bevel tooth 12 and the second bevel tooth 18 are inclined in opposite directions.

[0061] The first lock pin 10 and the second lock pin 16 can slide in the first slide hole 9 and the second slide hole 15 respectively, and the ends are kept in abutment with the first gear ring 7 and the second gear ring 13 respectively by the first support spring 11 and the second support spring 17. The first lock tooth and the second lock tooth serve as the meshing structure of the first lock pin 10 and the second lock pin 16 respectively, and are in an inclined state, and can be respectively meshed and disengaged in two rotation directions to realize a one-way meshing function;

[0062] The first rotating wheel 278 and the second rotating wheel 2714 are both fixed on the output shaft of the driving motor 3 , and both rotate synchronously with the output shaft of the driving motor 3 in the same direction.

[0063] In this embodiment, the top surface of the base 1 is provided with a first arc-shaped slide groove 19, and the second arc-shaped slide groove 20 is provided on the top surface. The centers of the first arc-shaped slide groove 19 and the second arc-shaped slide groove 20 are located on the axis of the output shaft of the driving motor 3.

[0064] The intermediate gear 36 has a first sliding support portion connected to the top surface and a second sliding support portion connected to the bottom surface, and is slidably connected to the first arcuate sliding groove 19 and the second arcuate sliding groove 20 through the first sliding support portion and the second sliding support portion, respectively.

[0065] The centers of the first arcuate slot 19 and the second arcuate slot 20 are located on the axis of the output shaft of the drive motor 3, that is, when the intermediate gear 36 moves, it will be restricted by the first arcuate slot 19 and the second arcuate slot 20, and rotate around the output shaft of the drive motor 3, that is, rotate around the second driving gear 5, so as to maintain the meshing state with the second driving gear 5 during the movement.

[0066] In this embodiment, the intermediate gear 36 is provided with a wheel axle, and the two ends of the wheel axle extend out of the top surface and the bottom surface of the intermediate gear 36 respectively;

[0067] The upper end of the wheel shaft extends upward to form a first sliding support portion that slides in the first arc-shaped sliding groove 19;

[0068] The second sliding support portion includes a connecting plate 21, the center of the connecting plate 21 is rotatably connected to the lower end of the wheel axle, and the bottom surfaces of both ends of the connecting plate 21 are connected to downwardly protruding pins 22, and the two pins 22 are slidably matched in the second arc-shaped sliding groove 20;

[0069] The upper end of the wheel shaft and the two latches 22 are sleeved with bearings.

[0070] The wheel axle serves as the rotation support structure of the intermediate gear 36 and as the sliding support force point of the intermediate gear 36. Its upper end serves as a sliding matching structure with the first arc-shaped slide groove 19, and its lower end forms a sliding matching structure with the second arc-shaped slide groove 20 through a connecting plate 21 and two pins 22.

[0071] In this embodiment, the top surface of the intermediate gear 36 is connected to the first friction disk 23, and the top surfaces of the two driven gears 6 are fixedly connected to the second friction disk 24;

[0072] The first friction plate 23 and the second friction plate 24 are coaxially arranged with the intermediate gear 36 and the driven gear 6 respectively, and the first friction plate 23 and the second friction plate 24 are located on the same plane.

[0073] The first friction plate 23 and the second friction plate 24 serve as structural extensions of the intermediate gear 36 and the driven gear 6 respectively, and transmit the power through edge friction contact during the transmission process, thereby avoiding tooth collision caused by the instantaneous engagement of the rotating state and the fixed state gears, and protecting the intermediate gear 36 and the driven gear 6.

[0074] In this embodiment, a positioning column 25 is provided on the base 1, and the line connecting the positioning column 25 and the output shaft of the driving motor 3 intersects perpendicularly with the line connecting the rotation centers of the two driven gears 6;

[0075] An elastic connector 26 is provided between the positioning column 25 and the upper end of the wheel shaft, and the intermediate gear 36 is kept separated from the two driven gears 6 by the elastic connector 26 .

[0076] The elastic connecting member 26 is used to position the intermediate gear 36 so that it remains separated from the two driven gears 6 . After the intermediate gear 36 is pushed to move, it can be reset to be separated from the two driven gears 6 through the elastic connecting member 26 .

[0077] In this embodiment, the positioning column 25 is rotatably matched with a rotating wheel 27, the wheel shaft is rotatably matched with a rotating ring, and the elastic connecting member 26 is an annular structure wound around the rotating wheel 27 and the rotating ring.

[0078] The elastic connector 26 can be a rubber ring or a spring ring. A bearing can be set between the rotating ring and the wheel axle to reduce the friction between the two. The rotating wheel 27 serves as the contact structure between the elastic connector 26 and the positioning column 25. It can rotate on the positioning column 25 so that the elasticity of the elastic connector 26 on both sides of the positioning column 25 is consistent.

[0079] In this embodiment, a pressure plate 29 is disposed on the outer side of the two driven gears 6. A friction plate 30 is connected to the side of the pressure plate 29 facing the driven gear 6, and a sleeve 32 is connected to the side facing away from the driven gear 6.

[0080] The sleeve 32 is inserted into the base 1 and slidably cooperates with the base 1. The base 1 is connected to a screw rod 34 through threaded cooperation. The end of the screw rod 34 is inserted into the sleeve 32. A third supporting spring 33 is arranged in the sleeve 32. Under the action of the third supporting spring 33, the friction plate 30 is kept in contact with the driven gear 6. A gasket 31 is arranged between the third supporting spring 33 and the end of the screw rod 34.

[0081] The friction plate 30 can apply a force to the driven gear 6, and can apply a force to the first driving gear 4 meshing therewith for positioning. When the output shaft of the driving motor 3 drives the second driving gear 5 to rotate, the first one-way meshing mechanism will also apply a force to the first driving gear 4. The thrust formed by the friction plate 30 is used to overcome the force applied by the first one-way meshing mechanism, so as to position the first driving gear 4.

[0082] In this embodiment, a friction ring 35 is provided on the driven gear 6 , and the friction ring 35 is fixedly connected to the driven gear 6 .

[0083] The surface of the friction ring 35 is smooth. When the first driving gear 4 drives the driven gear 6 to rotate under the action of the driving motor 3, the friction ring 35 with a smooth structure contacts the friction plate 30, which can reduce the loss of the friction plate 30. The friction plate 30 can be made of rubber.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A multi-station fixture, comprising a base and two clamping tables rotatably mounted on the top surface of the base, characterized in that: A driving motor is installed at the bottom of the base, and a transmission mechanism is arranged in the base. The two clamping tables are connected to the driving part through the transmission mechanism. The transmission mechanism drives the two clamping tables to rotate synchronously in the same direction or one of the clamping tables to rotate alone according to the different rotation directions of the driving motor.

2. The multi-station fixture according to claim 1, characterized in that: The transmission mechanism comprises a first driving gear and a second driving gear which are coaxially arranged, wherein the first driving gear and the second driving gear are both sleeved outside the output shaft of the driving motor, and a first one-way meshing component and a second one-way meshing component are respectively arranged between the first driving gear and the output shaft of the driving motor, and the meshing directions of the first one-way meshing component and the second one-way meshing component are opposite; The two clamping platforms are coaxially connected with driven gears, and the two driven gears are respectively meshed with the two sides of the first driving gear; the second driving gear is meshed with an intermediate gear, and the intermediate gear is located on one side of the line connecting the rotation centers of the two driven gears. The intermediate gear is slidably fitted on the base and can approach any driven gear by sliding.

3. The multi-station fixture according to claim 2, characterized in that: The first one-way meshing assembly includes a first gear ring coaxially arranged with the first driving gear and a first rotating wheel rotatably matched with the first gear ring, a wheel surface of the first rotating wheel is provided with a plurality of first sliding holes extending toward the center, a first locking pin is slidably connected in the sliding hole, a first supporting spring is arranged between one end of the first locking pin and the bottom of the first sliding hole, and the other end of the first locking pin is kept extending out of the first sliding hole under the action of the first supporting spring; The second one-way meshing assembly includes a second gear ring coaxially arranged with the second driving gear and a second rotating wheel rotatably matched with the second gear ring, a wheel surface of the second rotating wheel is provided with a plurality of second sliding holes extending toward the center, a second locking pin is slidably connected in the sliding hole, a second supporting spring is arranged between one end of the second locking pin and the bottom of the second sliding hole, and the other end of the second locking pin is kept extending out of the second sliding hole under the action of the second supporting spring; One end of the first locking pin extending out of the first sliding hole is provided with a first helical tooth meshing with the first gear ring, and one end of the second locking pin extending out of the second sliding hole is provided with a second helical tooth meshing with the second gear ring, and the tips of the first helical tooth and the second helical tooth are inclined in opposite directions.

4. The multi-station fixture according to claim 2, characterized in that: The top surface of the base is provided with a first arc-shaped slide groove, and the top surface is provided with a second arc-shaped slide groove, and the centers of the first arc-shaped slide groove and the second arc-shaped slide groove are located on the axis of the output shaft of the driving motor; The top surface of the intermediate gear is connected to a first sliding support portion, the bottom surface is connected to a second sliding support portion, and the intermediate gear is slidably connected to the first arc-shaped sliding groove and the second arc-shaped sliding groove through the first sliding support portion and the second sliding support portion respectively.

5. The multi-station fixture according to claim 4, characterized in that: The intermediate gear is provided with a wheel axle, and the two ends of the wheel axle extend out of the top surface and the bottom surface of the intermediate gear respectively; The upper end of the wheel shaft extends upward to form a first sliding support portion that slides in the first arc-shaped sliding groove; The second sliding support portion includes a connecting plate, the center of which is rotatably connected to the lower end of the wheel axle, and the bottom surfaces of both ends of the connecting plate are connected to downwardly protruding pins, and the two pins are slidably matched in the second arc-shaped sliding groove; The upper end of the wheel shaft and the two latches are sleeved with bearings.

6. The multi-station fixture according to claim 2, characterized in that: The top surface of the intermediate gear is connected to a first friction disk, and the top surfaces of the two driven gears are fixedly connected to second friction disks; The first friction plate and the second friction plate are coaxially arranged with the intermediate gear and the driven gear respectively, and the first friction plate and the second friction plate are located on the same plane.

7. The multi-station fixture according to claim 2, characterized in that: A positioning column is provided on the base, and a line connecting the positioning column and the output shaft of the driving motor intersects perpendicularly with a line connecting the rotation centers of the two driven gears; An elastic connecting piece is arranged between the positioning column and the upper end of the wheel shaft, and the intermediate gear is kept separated from the two driven gears under the action of the elastic connecting piece.

8. The multi-station fixture according to claim 7, characterized in that: The positioning column is rotatably matched with a rotating wheel outside, the wheel shaft is rotatably matched with a rotating ring outside, and the elastic connecting piece is an annular structure wound around the rotating wheel and the rotating ring.

9. The multi-station fixture according to claim 2, characterized in that: A pressure plate is disposed on the outer side of each of the two driven gears, a friction plate is connected to the side of the pressure plate facing the driven gear, and a connecting rod is connected to the side facing away from the driven gear; The base is connected with a sleeve which is sleeved outside the connecting rod, and a screw is threadedly fitted inside the outer end of the sleeve. A third supporting spring is arranged between the end of the screw and the end of the connecting rod, and under the action of the third supporting spring, the friction plate remains in a state of being in contact with the driven gear.

10. The multi-station fixture according to claim 9, characterized in that: The driven gear is provided with a friction ring, and the friction ring is fixedly connected to the driven gear.

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