Shaft conveying and clamping tool

Abstract

A shaft conveying and clamping fixture, relating to the field of shaft machining, includes: a mounting base, a centering mechanism, a clamping mechanism, and a pushing mechanism. A clamp is provided at one end of the mounting base along its length to clamp the shaft. The centering mechanism includes a movable plate and a support cylinder respectively located at both ends of the mounting base along its length and moving along the axis of the clamp, with the support cylinder and clamp located at the same end. A first ejector pin, coaxially arranged with the clamp and detachable, is provided below the movable plate. A second ejector pin, moving relative to the support cylinder along its axis and coaxially arranged with the clamp, passes through the support cylinder for centering both ends of the shaft. The clamping mechanism is located below the movable plate and includes multiple support rings spaced apart along its length and with notches at the top. Multiple pressure rollers, equally spaced and rotating around their own axes, are provided on the inner side of the support rings along the circumferential direction. The axes of the pressure rollers are parallel to the axis of the clamp and are used to clamp the shaft. This fixture can simultaneously apply centering and limiting to both ends of the shaft, reducing radial runout and improving machining accuracy.

Description

Technical Field

[0001] This invention relates to the field of shaft processing technology, and in particular to a shaft conveying and clamping fixture. Background Technology

[0002] When clamping and machining shaft-like parts, chucks and other clamping devices are typically used. For shaft-like parts with a long length, both the tail end and the machining end may wobble during rotation. If either end wobbles, it will inevitably cause radial runout at the machining end, which will significantly affect the machining accuracy. Therefore, it is necessary to use a centering pin to apply a limit to the end of the shaft-like part. However, currently, centering and limiting are usually only applied to the machining end of the shaft-like part, while the tail end is not. This means that the wobble at the tail end may still be transmitted to the machining end, which may also affect the machining accuracy. Furthermore, when the centering pin applies force to the machining end of the shaft-like part, it may cause the shaft-like part to be pushed, which may also affect the machining accuracy. Therefore, it is necessary to apply limits to both ends of the shaft-like part simultaneously during the machining process. Summary of the Invention

[0003] In view of the shortcomings of the above-mentioned prior art, this application provides a shaft conveying and clamping fixture that can simultaneously apply centering and limiting to both ends of shaft parts, reduce radial runout, improve machining accuracy, and has strong practicality.

[0004] To achieve the above objectives, the present invention employs the following techniques:

[0005] A shaft conveying and clamping fixture includes: a mounting base, a centering mechanism, a clamping mechanism, and a pushing mechanism.

[0006] A clamp is provided at one end of the mounting base along its length for clamping the shaft. The centering mechanism includes a movable plate and a support cylinder respectively located at both ends of the mounting base along its length and movable along the axis of the clamp. The support cylinder and the clamp are located at the same end. A first ejector pin is detachably provided below the movable plate and arranged coaxially with the clamp. A second ejector pin is provided through the support cylinder and is movable relative to it along its axis and arranged coaxially with the clamp. The first and second ejector pins are used to center the two ends of the shaft. The clamping mechanism is installed at the other end of the mounting base along its length and located below the movable plate. It includes multiple support rings arranged at intervals along its length and with notches at the top. Multiple pressure rollers are arranged at equal intervals along the circumferential direction on the inner side of the support rings and rotate around their own axes. The axis of the pressure rollers is parallel to the axis of the clamp and is used to clamp the shaft.

[0007] Furthermore, the first ejector pin is rotatably mounted on the mounting rod, and the mounting rod has a first screw on its side. The first screw passes through the connecting plate and is locked with a nut. The connecting plate is connected to the end of the movable plate away from the mounting base.

[0008] Furthermore, the end of the support cylinder away from the clamp is provided with a protrusion, and the protrusion is provided with a receiving groove. The end of the second ejector pin is provided with a retaining ring, which is slidably fitted in the receiving groove and sleeved on the support rod. The support rod is installed in the receiving groove and is sleeved with a first spring. The two ends of the first spring abut against the end wall of the receiving groove away from the clamp and the retaining ring, respectively, and are always in a compressed state.

[0009] Furthermore, a second screw is threaded through the end of the protrusion and locked with a nut. One end of the second screw is located in the receiving groove and is used to abut against the retaining ring.

[0010] Furthermore, the pressure roller is rotatably mounted on the concave frame, and a sliding plate is provided on the outside of the concave frame. The sliding plate passes through the support ring and moves along its axis.

[0011] Furthermore, the slide plates are all fitted onto the connecting rods, one end of which is fitted onto the guide rods. The guide rods are arranged radially along the support ring and are mounted on the support frame. The support frame is mounted on the mounting base. A rack is mounted on the connecting rod, the length direction of which is parallel to the radial direction of the adjacent guide rod and meshes with the driven gear. The driven gear is mounted on the rotating shaft and meshes with the gear ring. The gear ring is rotatably mounted on the support frame and meshes with the driving gear. The driving gear is mounted on the transmission shaft, which is rotatably mounted on the support frame, and one end of the transmission shaft is connected to the output end of the power equipment. The power equipment is mounted on the support frame.

[0012] Furthermore, the bottom of the movable plate is provided with a groove along its length, and a support block is slidably fitted in the groove, the support block being mounted on the mounting base.

[0013] Furthermore, a plurality of equally spaced positioning slots are provided on one side of the movable plate along its length, wherein at least two positioning slots are fitted with locking blocks. The locking blocks are arc-shaped on the side facing the first ejector pin, and the end is provided with a push rod. The push rod passes through the side plate, the side plate is mounted on the mounting base, and a second spring is sleeved on the push rod. The two ends of the second spring abut against the locking block and the side plate respectively, and are always in a compressed state.

[0014] Furthermore, the pushing mechanism includes a horizontal plate located on one side of the mounting base. A protruding plate is provided at one end of the horizontal plate near the second ejector pin. The end of the protruding plate is provided with a slot for engaging with an annular groove on the side wall of the shaft. The horizontal plate is provided with an elongated hole along its length. A moving block is slidably engaged in the elongated hole. The moving block is connected to the moving end of the first horizontal linear mechanism. The first horizontal linear mechanism is mounted on the mounting base and arranged along its width. Two end plates are provided at the top of the horizontal plate. A push plate is provided on the inner side of one of the end plates away from the moving block. In application, the end of the push plate engages with one of the positioning grooves.

[0015] Furthermore, a slide rod is inserted through the other end plate near the moving block. The slide rod is mounted on the connecting block, which is sleeved on the support rod and connected to the moving end of the second horizontal linear mechanism. The support rod and the second horizontal linear mechanism are both mounted on the mounting base and arranged along their length. One end of the push rod is connected to the U-shaped plate, and the opening of the U-shaped plate faces the first push pin. In application, the other end plate near the moving block is located in the U-shaped plate, and there is always a gap between one side of it and the inner wall of the U-shaped plate.

[0016] The beneficial effects of this invention are as follows: the first and second ejector pins of the centering mechanism can simultaneously apply centering and limiting to both ends of the shaft-like parts, and the clamping wheel applies limiting to the circumference of the shaft-like parts, thereby reducing the possible swaying during the rotation of the shaft-like parts, thereby reducing the radial runout of the machining end and improving machining accuracy; after the first ejector pin moves, the moving plate can be locked, thereby preventing the shaft-like parts from being pushed when the second ejector pin moves, further ensuring machining accuracy. Attached Figure Description

[0017] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the installation of the mobile board according to an embodiment of this application.

[0020] Figure 3 for Figure 2 Enlarged diagram of point A.

[0021] Figure 4 This is a schematic diagram of the installation of the second ejector pin according to an embodiment of this application.

[0022] Figure 5 This is a cross-sectional view of the second ejector pin installed in the support cylinder according to an embodiment of this application.

[0023] Figure 6 This is a three-dimensional schematic diagram of the clamping mechanism according to an embodiment of this application.

[0024] Figure 7 This is a front view of the clamping mechanism according to an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the installation of the concave frame according to an embodiment of this application.

[0026] Figure 9 This is a three-dimensional schematic diagram of the push mechanism according to an embodiment of this application.

[0027] Figure 10 for Figure 9 Enlarged diagram of point B.

[0028] Explanation of reference numerals in the attached drawings: 100—Mounting base, 200—Centering mechanism, 300—Clamping mechanism, 400—Pushing mechanism, 101—Clamp, 201—Moving plate, 202—Support cylinder, 203—First ejector pin, 204—Second ejector pin, 205—Mounting rod, 206—First screw, 207—Connecting plate, 208—Protrusion, 209—Receiving groove, 210—Snap ring, 211—Support rod, 212—First spring, 213—Second screw, 214—Slide groove, 215—Support block, 216—Positioning groove, 217—Clamping block, 218—Ejector rod, 219—Side plate, 220—Second spring, 221—U-shaped plate, 301—Support ring, 302—Pressure roller, 303—Concave frame, 304—Slide plate, 305—Connecting rod, 306—Guide rod, 307—Support frame, 308—Rack, 309—Driven gear, 310—Rotating shaft, 311—Gear ring, 312—Driving gear, 313—Transmission shaft, 401—Horizontal plate, 402—Protruding plate, 403—Elongated hole, 404—Moving block, 405—End plate, 406—Slide rod, 407—Connecting block, 408—Support rod, 409—Push plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0030] like Figures 1-10 As shown in the figure, this application provides a shaft conveying and clamping fixture, including: mounting base 100, centering mechanism 200, clamping mechanism 300, pushing mechanism 400, etc.

[0031] A clamp 101 is provided at one end of the mounting base 100 along its length for clamping the shaft. For the selection of the clamp 101, only commonly used machine tool chucks, such as three-jaw chucks or four-jaw chucks, are needed. The centering mechanism 200 includes a movable plate 201 and a support cylinder 202, respectively located at both ends of the mounting base 100 along the length of the clamp 101 and movable along the axis of the clamp 101. The support cylinder 202 is located at the same end as the clamp 101. A first ejector pin 203, coaxially arranged and detachable with the clamp 101, is provided below the movable plate 201. A second ejector pin 204, movable relative to the support cylinder 202 and coaxially arranged with the clamp 101, passes through the support cylinder 202. When the shaft is passed through and clamped by the clamp 101, the movable plate 201 is moved towards the support cylinder 202, causing the first ejector pin 203 to abut against the end of the shaft, and the movable plate 201... The support cylinder 202 is fixed, and then moved toward the clamp 101, so that the second ejector pin 204 applies force to the machining end of the shaft, thereby applying centering and limiting to both ends of the shaft; the clamping mechanism 300 is installed at the other end of the mounting base 100 in the length direction and is located below the moving plate 201. It includes multiple support rings 301 arranged at intervals along their length direction and with notches at the top. The notches are used to pass through the first ejector pin 203 to avoid interference. Multiple pressure rollers 302 are arranged at equal intervals along the circumferential direction on the inner side of the support ring 301 and rotate around their own axis. The axis of the pressure rollers 302 is parallel to the axis of the clamp 101. After the first ejector pin 203 and the second ejector pin 204 apply centering to both ends of the shaft, the pressure rollers 302 can be moved synchronously along the radial direction of the support ring 301 to apply limiting to the circumference of the shaft and reduce the swing of the shaft.

[0032] Specifically, such as Figures 1-2 As shown, the first ejector pin 203 is rotatably mounted on the mounting rod 205. The mounting rod 205 has a first screw 206 on its side. The first screw 206 passes through the connecting plate 207 and is locked with a nut. The connecting plate 207 is connected to the end of the moving plate 201 away from the mounting seat 100. When centering shafts of different diameters, the spacing between the pressure rollers 302 is also different. The detachable design facilitates the replacement of the specifications of the first ejector pin 203, ensuring that the first ejector pin 203 can pass smoothly through the area between the pressure rollers 302. In order to ensure the stability of the position of the first ejector pin 203, a guide post is set on the mounting rod 205. The guide post passes through the connecting plate 207 to achieve positioning.

[0033] Specifically, such as Figure 1 , Figures 4-5As shown, the end of the support cylinder 202 away from the clamp 101 is provided with a protrusion 208. For easy installation, the protrusion 208 and the support cylinder 202 can be connected by a thread. The protrusion 208 is provided with a receiving groove 209. The end of the second ejector pin 204 is provided with a retaining ring 210. The connection between the retaining ring 210 and the second ejector pin 204 can also be made by a thread. The retaining ring 210 is slidably fitted in the receiving groove 209 and sleeved on the support rod 211. The support rod 211 is installed in the receiving groove 209 and is sleeved with a first spring 212. The two ends of the first spring 212 abut against the end of the receiving groove 209 away from the clamp 101 and the retaining ring 210, respectively, and are always in a compressed state. Under the action of a spring 212, the second ejector pin 204 always tends to protrude outward toward the support cylinder 202. During the process of moving the support cylinder 202 toward the clamp 101, the second ejector pin 204 will contact the machining end of the shaft. As the support cylinder 202 continues to move, under the obstruction of the first ejector pin 203, the second ejector pin 204 will slide relative to the support cylinder 202. The first spring 212 is further compressed, so that a force can be applied to the machining end of the shaft, and the shaft can also be prevented from being pushed. As for the movement of the support cylinder 202, it is only necessary to connect it to the moving end of a horizontal linear mechanism, and the horizontal linear mechanism is arranged along the length direction of the mounting base 100.

[0034] Specifically, such as Figures 4-5 As shown, the required force varies for shafts of different materials and diameters, resulting in different compression amounts for the first spring 212. Furthermore, since the first spring 212 undergoes compression deformation under external force, to ensure the stability of the force applied by the second ejector pin 204 to the machined end of the shaft, it is necessary to prevent the first spring 212 from deforming again after the second ejector pin 204 applies force to the shaft. Therefore, a second screw 213 is inserted through the end of the protrusion 208 and locked with a nut. One end of the second screw 213 is located in the receiving groove 209 and abuts against the retaining ring 210. The distance between the second screw 213 and the retaining ring 210 can be adjusted by moving the second screw 213, and then the second screw 213 is locked with a nut. When the second ejector pin 204 contacts the machined end of the shaft, and the retaining ring 210 abuts against the end of the second screw 213, it indicates that the force applied by the second ejector pin 204 to the end of the shaft has reached the standard.

[0035] Specifically, such as Figure 1 , Figures 6-8As shown, the clamping roller 302 is rotatably mounted on the concave frame 303. The concave frame 303 is provided with a sliding plate 304 on the outside. The sliding plate 304 passes through the support ring 301 and moves along its axis. After clamping the shaft, the concave frame 303 can be moved synchronously along the radial direction of the support ring 301 so that the clamping roller 302 contacts the side wall of the shaft and applies a limit to its periphery to prevent the shaft from swinging. The support rings 301 are all mounted on the support plate, and the support plate is arranged along the length direction of the mounting base 100 and mounted on the mounting base 100.

[0036] Specifically, such as Figure 1 , Figures 6-8 As shown, the slide plates 304 are all sleeved on the connecting rods 305. One end of the connecting rod 305 is sleeved on the guide rod 306. The guide rod 306 is arranged radially along the support ring 301 and is mounted on the support frame 307 through a pair of supports. The support frame 307 is mounted on the mounting base 100. A rack 308 is mounted on the connecting rod 305. The length direction of the rack 308 is parallel to the radial direction of the adjacent guide rod 306 and meshes with the driven gear 309. The driven gear 309 is mounted on the rotating shaft 310 and meshes with the gear ring 311. The gear ring 311 is rotatably mounted on the support frame 307 and meshes with the driving gear 312. 312 is mounted on the drive shaft 313, which is rotatably mounted on the support frame 307, with one end connected to the output end of the power equipment. The power equipment is mounted on the support frame 307. When it is necessary to make the clamping roller 302 move synchronously along the radial direction of the support ring 301, the power equipment drives the drive shaft 313 to rotate, which in turn drives the drive gear 312 to rotate. At this time, under the transmission of the gear ring 311, the driven gear 309 rotates, which forces the rack 308 to move radially along the support ring 301, so that the clamping roller 302 moves synchronously along the radial direction of the support ring 301, thereby achieving the limitation and clamping of the shaft circumference.

[0037] Specifically, such as Figure 2 , Figures 9-10 As shown, the bottom of the movable plate 201 is provided with a groove 214 along its length direction. A support block 215 is slidably fitted in the groove 214. The support block 215 is installed on the mounting base 100. When it is necessary to move the shaft, the movable plate 201 is moved along its own length direction. The groove 214 and the support block 215 slide relative to each other. Under the push of the first ejector pin 203, the shaft will be pushed to move.

[0038] Specifically, such as Figures 2-3To ensure automatic positioning after the movable plate 201 moves, multiple equally spaced positioning slots 216 are provided along the length of one side of the movable plate 201. Two positioning slots 216 contain locking blocks 217. The side of the locking block 217 away from the clamp 101 is arc-shaped, and its end is provided with a push rod 218. The push rod 218 passes through a side plate 219, which is mounted on the mounting base 100. A second spring 220 is sleeved on the push rod 218. The two ends of the second spring 220 abut against the locking block 217 and the side plate 219 respectively, and are always in a compressed state. The second spring 220 is compressed further. After the shaft moves a certain distance, the edge of the positioning groove 216 will contact the arc-shaped side of the locking block 217, forcing the locking block 217 to move out of the positioning groove 216. At this time, the second spring 220 is further compressed. After the shaft moves a certain distance, the locking block 217 will re-enter the positioning groove 216 under the action of the second spring 220, and the positioning of the moving plate 201 will be achieved again. This prevents the second ejector pin 204 from pushing the moving plate 201 away when it applies force to the shaft, thus ensuring the centering effect of the shaft.

[0039] Specifically, such as Figures 2-3 , Figures 9-10As shown, the pushing mechanism 400 includes a horizontal plate 401 disposed on one side of the mounting base 100. A protruding plate 402 is provided at one end of the horizontal plate 401 near the second ejector pin 204. A groove is provided at the end of the protruding plate 402 for engaging with an annular groove in the side wall of the shaft. An elongated hole 403 is provided along the length of the horizontal plate 401, and a moving block 404 is slidably fitted into the elongated hole 403. The moving block 404 is connected to the moving end of the first horizontal linear mechanism. The first horizontal linear mechanism is mounted on the mounting base 100 and extends along its width direction... The horizontal plate 401 is arranged with two end plates 405 at its top. One end plate 405, furthest from the moving block 404, has a push plate 409 on its inner side. When the moving plate 201 needs to be pushed, the end of the push plate 409 engages in one of the positioning grooves 216. The other end plate 405, closer to the moving block 404, has a sliding rod 406 passing through it. The sliding rod 406 is mounted on a connecting block 407, which is sleeved on a support rod 408 and connected to the moving end of the second horizontal linear mechanism. The support rod 408... Both the first horizontal linear mechanism and the second horizontal linear mechanism are mounted on the mounting base 100 and arranged along its length. After the shaft is fully centered and clamped, the first horizontal linear mechanism moves the moving block 404 away from the mounting base 100, causing the groove of the convex plate 402 to disengage from the annular groove of the shaft. At this time, the push plate 409 is located outside the positioning groove 216. After the shaft is machined, the second horizontal linear mechanism drives the connecting block 407 away from the fixture 101, causing the convex plate 402 to disengage from the fixture 101. 02 Return to the initial position, and then drive the moving block 404 toward the mounting base 100 again through the first horizontal linear mechanism, so that the slot at the end of the convex plate 402 is engaged in the annular groove of the shaft again, and at this time the push plate 409 is located in the positioning groove 216. Then drive the connecting block 407 toward the clamp 101 through the second horizontal linear mechanism to realize the movement of the shaft until the shaft moves a predetermined distance, and at this time the locking block 217 is locked in the positioning groove 216 again, and so on.

[0040] More specifically, such as Figures 2-3 , Figures 9-10 As shown, to facilitate the return of the movable plate 201 to its original position, one end of each push rod 218 is connected to the U-shaped plate 221. The opening of the U-shaped plate 221 faces the first push pin 203. Another end plate 405, which is close to the movable block 404, is located in the U-shaped plate 221. When the movable plate 201 needs to be reset, the horizontal plate 401 moves away from the mounting base 100, so that the end plate 405 abuts against the inner side of the U-shaped plate 221 away from the mounting base 100. At this time, the push plate 409 also moves out of the positioning groove 216. As the horizontal plate 401 continues to move, it will drive the U-shaped plate 221 to move together until the locking block 217 moves out of the positioning groove 216. At this time, the movable plate 201 has been completely released from its limit, and the movable plate 201 can be reset. Then, the horizontal plate 401 is moved towards the mounting base 100 to reset.

[0041] Furthermore, there is always a gap between one side of the end plate 405 and the inner wall of the U-shaped plate 221. When the push plate 409 is just removed from the positioning groove 216, the locking block 217 is still in the positioning groove 216, ensuring the positioning of the moving plate 201 during the shaft processing.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A shaft conveying and clamping fixture, characterized in that, include: The mounting base (100) has a clamp (101) at one end along its length for clamping the shaft; The centering mechanism (200) includes a movable plate (201) and a support cylinder (202) respectively disposed at both ends of the mounting base (100) along the length direction and movable along the axis of the clamp (101). The support cylinder (202) and the clamp (101) are located at the same end. A first ejector pin (203) is detachably disposed below the movable plate (201) and arranged coaxially with the clamp (101). A second ejector pin (204) is disposed in the support cylinder (202) and moved relative to it along its axis and arranged coaxially with the clamp (101). The first ejector pin (203) and the second ejector pin (204) are used to center the two ends of the shaft. The clamping mechanism (300) is installed at the other end of the mounting base (100) along the length direction and is located below the moving plate (201). It includes multiple support rings (301) arranged at intervals along the length direction and having notches at the top. Multiple pressure rollers (302) are arranged at equal intervals along the circumferential direction on the inner side of the support rings (301) and rotate around their own axes. The axes of the pressure rollers (302) are parallel to the axis of the clamp (101) and are used to clamp the shaft. The pressing wheel (302) is rotatably mounted on the concave frame (303), and the concave frame (303) is provided with a sliding plate (304) on the outside. The sliding plate (304) passes through the support ring (301) and moves along its axis. The sliding plates (304) are all sleeved on the connecting rods (305). One end of the connecting rod (305) is sleeved on the guide rod (306). The guide rod (306) is arranged radially along the support ring (301) and is installed on the support frame (307). The support frame (307) is installed on the mounting base (100). A rack (308) is installed on the connecting rod (305). The length direction of the rack (308) is parallel to the radial direction of the adjacent guide rod (306) and is parallel to the driven gear. The driven gear (309) is mounted on the rotating shaft (310) and meshes with the gear ring (311). The gear ring (311) is rotatably mounted on the support frame (307) and meshes with the driving gear (312). The driving gear (312) is mounted on the transmission shaft (313). The transmission shaft (313) is rotatably mounted on the support frame (307) and one end is connected to the output end of the power equipment. The power equipment is mounted on the support frame (307).

2. The shaft conveying and clamping fixture according to claim 1, characterized in that, The first ejector pin (203) is rotatably mounted on the mounting rod (205). The mounting rod (205) has a first screw (206) on its side. The first screw (206) passes through the connecting plate (207) and is locked with a nut. The connecting plate (207) is connected to the end of the moving plate (201) away from the mounting base (100).

3. The shaft conveying and clamping fixture according to claim 1, characterized in that, The support cylinder (202) has a protrusion (208) at one end away from the clamp (101). The protrusion (208) has a receiving groove (209). The end of the second ejector pin (204) has a retaining ring (210). The retaining ring (210) is slidably fitted in the receiving groove (209) and sleeved on the support rod (211). The support rod (211) is installed in the receiving groove (209) and sleeved with a first spring (212). The two ends of the first spring (212) abut against the end wall of the receiving groove (209) away from the clamp (101) and the retaining ring (210), respectively, and are always in a compressed state.

4. The shaft conveying and clamping fixture according to claim 3, characterized in that, The end of the protrusion (208) is threaded with a second screw (213) and locked with a nut. One end of the second screw (213) is located in the receiving groove (209) and is used to abut against the retaining ring (210).

5. The shaft conveying and clamping fixture according to claim 1, characterized in that, The bottom of the movable plate (201) is provided with a groove (214) along its length direction, and a support block (215) is slidably fitted in the groove (214), and the support block (215) is installed on the mounting base (100).

6. The shaft conveying and clamping fixture according to claim 1, characterized in that, The movable plate (201) has a plurality of equally spaced positioning slots (216) along its length on one side, wherein at least two of the positioning slots (216) are fitted with locking blocks (217). The locking blocks (217) are arc-shaped on the side facing the first ejector pin (203) and have a push rod (218) at their ends. The push rod (218) passes through the side plate (219), which is mounted on the mounting base (100). A second spring (220) is sleeved on the push rod (218). The two ends of the second spring (220) abut against the locking block (217) and the side plate (219) respectively, and are always in a compressed state.

7. The shaft conveying and clamping fixture according to claim 6, characterized in that, It also includes a pushing mechanism (400), which includes a horizontal plate (401) disposed on one side of the mounting base (100). The horizontal plate (401) has a protruding plate (402) at one end near the second ejector pin (204). The end of the protruding plate (402) has a slot for engaging with the annular groove on the side wall of the shaft. The horizontal plate (401) has an elongated hole (403) along its length direction. A moving block (404) is slidably engaged in the elongated hole (403). The moving block (404) is connected to the moving end of the first horizontal linear mechanism. The first horizontal linear mechanism is mounted on the mounting base (100) and arranged along its width direction. The top of the horizontal plate (401) is provided with two end plates (405). One of the end plates (405) away from the moving block (404) has a push plate (409) on its inner side. In application, the end of the push plate (409) engages with one of the positioning grooves (216).

8. The shaft conveying and clamping fixture according to claim 7, characterized in that, A slide rod (406) is provided in the end plate (405) near the moving block (404). The slide rod (406) is mounted on the connecting block (407). The connecting block (407) is sleeved on the support rod (408) and connected to the moving end of the second horizontal linear mechanism. The support rod (408) and the second horizontal linear mechanism are both mounted on the mounting base (100) and arranged along its length. One end of the top rod (218) is connected to the U-shaped plate (221). The opening of the U-shaped plate (221) faces the first top pin (203). In application, the end plate (405) near the moving block (404) is located in the U-shaped plate (221), and there is always a gap between one side of it and the inner wall of the U-shaped plate (221).

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