An automatic processing device for producing a rotating shaft

Abstract

The application belongs to the technical field of rotating shaft processing, and discloses a kind of automatic processing device for rotating shaft production, including bottom plate and self-adapting clamping assembly, the top of the bottom plate is fixedly connected with frame one, and hydraulic assembly is installed on frame one, the self-adapting clamping assembly includes two groups of V-shaped clamping jaw one symmetrically installed on the bottom of hydraulic assembly. The above scheme is pushed along the axial direction and placed on two groups of V-shaped clamping jaw two for support, under the cooperation of vertical rod two and frame one, hydraulic rod is operated to push horizontal frame downward, when V-shaped clamping jaw one bottom end extrudes top plate, hydraulic oil in top plate will be input into piston rod two through communication pipe to lift V-shaped clamping jaw two, when the diameter of the rotating shaft to be fixed is different, the downward distance of V-shaped clamping jaw one is different, at this time, the height of corresponding V-shaped clamping jaw two is different, so that the axial height of rotating shaft can always be kept uniform when different rotating shafts are clamped.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of shaft machining, and particularly relates to an automatic machining device for shaft production. BACKGROUND

[0002] A shaft is a rigid rod with a cross section mostly in a circular shape, used for supporting rotating parts and transmitting torque and power. During the shaft machining process, the shaft also needs to be drilled to facilitate the conduction of lubricating oil or gas pipeline.

[0003] When the shaft is bored or drilled, the shaft is conveyed to the support frame, the shaft on the support frame is pressed down by the driving of the cylinder or the hydraulic assembly, and then the shaft is drilled or bored in the axial direction by the drilling or boring equipment. However, for the shafts of different diameters that need to be processed frequently, the height of the support frame or the height of the drilling or boring equipment needs to be adjusted constantly by the operator to ensure that the drill bit on the drilling or boring equipment can accurately align with the shaft center. Therefore, for the support or clamping fixing equipment that needs to process shafts of different diameters frequently, the efficiency of shaft machining is greatly reduced.

[0004] Therefore, to solve the above problems, an automatic machining device for shaft production is provided. SUMMARY

[0005] To solve the problems in the background art, the application provides an automatic machining device for shaft production, which solves the problem that the support clamping fixing equipment needs to be adjusted in height when clamping and fixing shafts of different diameters.

[0006] To achieve the above purpose, the application provides the following technical scheme: an automatic machining device for shaft production, comprising a bottom plate and a self-adaptive clamping assembly, a frame one is fixedly connected to the top of the bottom plate, and a hydraulic assembly is installed on the frame one, the self-adaptive clamping assembly comprises two groups of V-shaped clamping jaws one symmetrically installed at the bottom of the hydraulic assembly, two groups of V-shaped clamping jaws two are arranged below the V-shaped clamping jaws one on the bottom plate, and the V-shaped clamping jaws one and the V-shaped clamping jaws two are staggered in the vertical direction, two groups of four supports are symmetrically fixedly connected to the top of the bottom plate, a piston rod one in an initial elongated state and a piston rod two in an initial contracted state are fixedly connected to the top of the support, and the piston rod one and the piston rod two are of the same size, a communication pipe is fixedly connected to the bottom end of the piston rod one, the other end of the communication pipe is in communication with the bottom end of the piston rod one, and a top plate is fixedly connected to the top of the piston rod one.

[0007] The bottom of the top plate coincides with the bottom end of the V-shaped clamping jaw one in the vertical direction.

[0008] Preferably, the V-shaped clamping jaw one is movably connected with an elastic sliding block on one side, the elastic sliding block has a tendency to move towards the end of the V-shaped clamping jaw one, and a convex shaft one with a length greater than the width of the V-shaped clamping jaw one is fixedly connected to the elastic sliding block.

[0009] The V-shaped clamping jaw two is provided with a guide groove and an opening located at the top of the guide groove and communicating with the guide groove, and the opening is located directly below the convex shaft one in the initial state, and the convex shaft one can slide in the opening when descending.

[0010] Preferably, the included angle of the V-shaped clamping jaw one and the V-shaped clamping jaw two is equal, and the included angle is less than 90°.

[0011] Preferably, the height difference between the top end of the guide groove and the upper surface of the top plate is H, and the height difference between the axis of the convex shaft one and the bottom end of the V-shaped clamping jaw one is H.

[0012] Preferably, the hydraulic assembly comprises a hydraulic rod fixedly connected to the top of the frame one, a horizontal frame fixedly connected to the bottom of the hydraulic rod, and two vertical rods two symmetrically fixedly connected to the upper surface of the horizontal frame and located on both sides of the hydraulic rod, wherein the vertical rods two are vertically sleeved on the frame one.

[0013] The V-shaped clamping jaw one is fixedly connected to the bottom of the horizontal frame.

[0014] Preferably, a group of frame twos located in the misaligned symmetric direction of the frame one are fixedly connected to the top of the bottom plate, and a discharging assembly is further arranged at the top of the frame two.

[0015] The discharging assembly comprises a J-shaped rod hingedly connected to the top of the frame two, a hook-shaped end formed at the bottom end of the J-shaped rod, a bent rod two fixedly connected to the top of the horizontal frame and located above the J-shaped rod, and an elastic hooking piece hingedly connected to the bottom of the bent rod two.

[0016] A supporting rod for supporting the bottom of the J-shaped rod is fixedly connected to one side of the frame two, and the same horizontal plate piece is fixedly connected to the J-shaped rods of the two groups of discharging assemblies, and the elastic hooking piece can hook up the hook-shaped end when descending.

[0017] Preferably, a vertical rod one is fixedly connected to the top of one end of the horizontal frame, a connecting shaft is fixedly connected to the frame one, and a limiting assembly is arranged at the end of the connecting shaft.

[0018] The limiting assembly comprises a blocking rod piece hingedly connected to the end of the connecting shaft, a bent rod one movably sleeved on the outer periphery of the vertical rod one, a straight slot formed in the blocking rod piece, and a pull spring fixedly connected to the lower surface of the blocking rod piece and having the other end fixedly connected to the top of the bottom plate, wherein the bottom end of the blocking rod piece is disc-shaped, and the center of the disc is opposite to the axis of the shaft body.

[0019] The blocking rod piece is always in an inclined state, and the top of the horizontal frame abuts against the top end of the bent rod one in the initial state, so that the pull spring is in a stretched state.

[0020] Preferably, the bottom end of the blocking rod piece is movably connected with a ball with a diameter greater than the thickness of the blocking rod piece, and the rotating shaft can contact the ball when moving towards the ball.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] The above scheme supports the rotating shaft by pushing the rotating shaft along the axial direction and placing it on the two sets of V-shaped clamping jaws II, operates the hydraulic rod to push the cross frame downward in cooperation with the vertical rod II and the frame I, and when the V-shaped clamping jaw I extrudes the top plate, the hydraulic oil in the top plate is input into the piston rod II through the communication pipe to lift the V-shaped clamping jaw II, and when the diameter of the rotating shaft to be fixed is different, the downward distance of the V-shaped clamping jaw I is different, and at this time, the height of the V-shaped clamping jaw II that can be lifted is different, thereby ensuring that the axial height of the rotating shaft can always remain uniform when clamping different rotating shafts.

[0023] The above scheme drives the bent rod II and the elastic hook piece downward by the downward movement of the cross frame, and since the hook-shaped end is inclined downward towards the elastic hook piece, the elastic hook piece can hook the hook-shaped end when it moves downward, and when the cross frame is reset by moving upward again, the hook-shaped end can be lifted by the bent rod II and the elastic hook piece, so that the J-shaped rod rotates around the shaft and lifts the rotating shaft, and when the rotating shaft rolls out along the straight part of the J-shaped rod, the inclination direction of the hook-shaped end is reversed due to the increase of the inclination angle of the J-shaped rod, at this time, the elastic hook piece is unhooked, so that the J-shaped rod is reset for the next work.

[0024] The above scheme contacts the rotating shaft with the blocking rod piece and positions it when the rotating shaft is pushed into the V-shaped clamping jaw II along the axial direction, and the blocking rod piece rotates downward under the action of the tension of the tension spring when the cross frame moves downward, at this time, the bottom end of the bent rod I slides in the straight slot, thereby driving the bent rod I to move downward, and when the bent rod I moves downward to the bottom end, the cross frame can continue to move downward to clamp and fix the rotating shaft, and at this time, the rotating shaft is misaligned with the blocking rod piece in the axial direction, which facilitates the subsequent drilling or boring operation of the drilling or boring equipment on the rotating shaft. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0026] Figure 2 It is a schematic diagram of the back plane structure of the present application;

[0027] Figure 3 It is a schematic diagram of the adaptive clamping assembly of the present application;

[0028] Figure 4 It is a side view perspective view of the adaptive clamping assembly of the present application;

[0029] Figure 5 It is Figure 4 It is an enlarged view of position A in FIG. 6.

[0030] Figure 6 It is the side view planar view at the J-shaped rod of the present application;

[0031] Figure 7 It is the structural schematic view of the bending rod one of the present application;

[0032] Figure 8 It is the side view planar structural schematic view of the present application.

[0033] In the figure: 1, bottom plate; 11, frame body one; 111, connecting shaft; 12, frame body two; 13, support rod; 2, hydraulic assembly; 21, hydraulic rod; 22, cross frame; 221, vertical rod one; 23, vertical rod two; 3, self-adaptive clamping assembly; 31, V-shaped clamping jaw one; 311, elastic sliding block; 312, convex shaft one; 32, V-shaped clamping jaw two; 321, guide groove; 322, notch; 33, support; 34, piston rod one; 341, top plate; 35, communication pipe; 36, piston rod two; 4, limiting assembly; 41, bending rod one; 42, blocking rod piece; 421, ball; 43, tension spring; 44, straight slot; 5, blanking assembly; 51, J-shaped rod; 511, horizontal plate piece; 52, hook-shaped end; 53, bending rod two; 54, elastic hook piece. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] As Figures 1 to 8 shown, the present application provides an automatic machining device for rotating shaft production, which comprises a bottom plate 1 and a self-adaptive clamping assembly 3, the top of the bottom plate 1 is fixedly connected with a frame body one 11, and the hydraulic assembly 2 is installed on the frame body one 11;

[0036] The self-adaptive clamping assembly 3 comprises two groups of V-shaped clamping jaw one 31 symmetrically installed at the bottom of the hydraulic assembly 2, the top of the bottom plate 1 is provided with two groups of V-shaped clamping jaw two 32 located below the V-shaped clamping jaw one 31, and the V-shaped clamping jaw one 31 and the V-shaped clamping jaw two 32 are staggered in the vertical direction, the top of the bottom plate 1 is fixedly connected with two groups of four support 33, the top of the support 33 is fixedly connected with the piston rod one 34 in the initial elongated state and the piston rod two 36 in the initial contracted state, and the piston rod one 34 and the piston rod two 36 are the same size, the bottom end of the piston rod one 34 is fixedly connected with the communication pipe 35, the other end of the communication pipe 35 is communicated with the bottom end of the piston rod one 34, and the top of the piston rod one 34 is fixedly connected with the top plate 341;

[0037] The hydraulic assembly 2 includes a hydraulic rod 21 fixed to the top of the frame 11, a crossbar 22 fixed to the bottom of the hydraulic rod 21, and vertical rods 23 located on both sides of the hydraulic rod 21 symmetrically fixed to the upper surface of the crossbar 22. The vertical rods 23 are vertically sleeved on the frame 11; V-shaped gripper 31 is fixed to the bottom of the crossbar 22.

[0038] The bottom of the top plate 341 coincides with the bottom of the V-shaped gripper 31 in the vertical direction.

[0039] Using the above scheme, the rotating shaft is pushed axially and supported on two sets of V-shaped grippers 32. With the cooperation of the vertical rod 23 and the frame 11, the hydraulic rod 21 pushes the horizontal frame 22 downward. When the bottom end of the V-shaped gripper 31 presses against the top plate 341, the hydraulic oil in the top plate 341 is input to the piston rod 36 through the connecting pipe 35 to lift the V-shaped gripper 32. When the diameter of the rotating shaft to be fixed is different, the distance that the V-shaped gripper 31 moves downward is different. At this time, the height that the V-shaped gripper 32 can be lifted is different, thus ensuring that the axis height of the rotating shaft can always remain uniform when clamping different rotating shafts.

[0040] It is worth noting that the inner surfaces of both V-shaped gripper 31 and V-shaped gripper 32 are equipped with removable anti-slip pads, and the device can hold a rotating shaft with the largest diameter that is half the distance between the two ends of V-shaped gripper 31.

[0041] like Figures 1-5 As shown, the V-shaped gripper 31 is movably connected to two sides of the elastic slider 311. The elastic slider 311 has a tendency to move towards the end of the V-shaped gripper 31. A convex shaft 312 with a length greater than the width of the V-shaped gripper 31 is also fixed on the elastic slider 311.

[0042] The V-shaped gripper 32 has a guide groove 321 and a notch 322 located at the top of the guide groove 321 and communicating with it. In the initial state, the notch 322 is directly below the convex shaft 312, and the convex shaft 312 can slide in the notch 322 when it moves downward.

[0043] The included angles of V-shaped gripper 31 and V-shaped gripper 32 are equal and both are less than 90°, which makes it easier for the elastic slider 311 to slide along the guide groove 321.

[0044] The height difference between the top of the guide groove 321 and the upper surface of the top plate 341 is H, and the height difference between the axis of the convex shaft 312 and the bottom of the V-shaped gripper 31 is H.

[0045] With the above scheme, when the V-shaped clamping jaw one 31 descends, the convex shaft one 312 can enter the guide groove 321 through the gap 322, at this time, the intersection point of the edges of the V-shaped clamping jaw one 31 and the V-shaped clamping jaw two 32 is the convex shaft one 312, and the height of the intersection point is the same as the upper surface of the top plate 341, so that the height of the center of the rotating shaft on the V-shaped clamping jaw two 32 can always be kept uniform after being completely clamped.

[0046] As shown in Figure 1 , Figure 2 , Figure 6 and Figure 8 , a group of frame bodies two 12 located in the staggered symmetric direction of the frame body one 11 is fixed to the top of the bottom plate 1, and the top of the frame body two 12 is also provided with a discharging assembly 5;

[0047] The discharging assembly 5 includes a J-shaped rod 51 hinged to the top of the frame body two 12, and a hook-shaped end 52 is formed at the bottom end of the J-shaped rod 51, and a bent rod two 53 is fixed to the top of the horizontal frame 22 and located above the J-shaped rod 51, and a flexible hook piece 54 is hinged to the bottom of the bent rod two 53;

[0048] A support rod 13 is fixed to one side of the frame body two 12 and used to support the bottom of the J-shaped rod 51, and the same horizontal plate 511 is fixed to the J-shaped rod 51 on the two groups of discharging assemblies 5, and the flexible hook piece 54 can hook the hook-shaped end 52 when descending;

[0049] With the above scheme, the bent rod two 53 and the flexible hook piece 54 are driven to descend by the descending of the horizontal frame 22, and since the hook-shaped end 52 is inclined downward toward the flexible hook piece 54, the flexible hook piece 54 can hook the hook-shaped end 52 when descending, and the hook-shaped end 52 can be lifted by the bent rod two 53 and the flexible hook piece 54 when the horizontal frame 22 re-ascends to reset, so that the J-shaped rod 51 rotates around the shaft and lifts the rotating shaft, and when the rotating shaft rolls out along the straight part of the J-shaped rod 51, the inclination direction of the hook-shaped end 52 is reversed due to the increase of the inclination angle of the J-shaped rod 51, at this time, the flexible hook piece 54 is unhooked, so that the J-shaped rod 51 resets for the next work.

[0050] As shown in Figure 1 , Figure 2 , Figure 7 and Figure 8 , a vertical rod one 221 is fixed to the top of one end of the horizontal frame 22, a connecting shaft 111 is fixed to the frame body one 11, and a limiting assembly 4 is arranged at the end of the connecting shaft 111;

[0051] The limiting assembly 4 comprises a stop rod 42 hinged to the end of the connecting shaft 111, a bent rod 41 movably sleeved on the outer periphery of the vertical rod 221, a straight slot 44 formed on the stop rod 42, the bottom end of the bent rod 41 being capable of sliding in the straight slot 44, a tension spring 43 fixed to the lower surface of the stop rod 42 and fixedly connected to the top of the bottom plate 1 at the other end, and the bottom end of the stop rod 42 being disc-shaped with the center of the disc being opposite to the shaft center of the shaft body;

[0052] The stop rod 42 is always in an inclined state, and in the initial state, the top of the horizontal frame 22 abuts against the top end of the bent rod 41, so that the tension spring 43 is in a stretched state.

[0053] The bottom end of the stop rod 42 movably connects a ball 421 with a diameter greater than the thickness of the stop rod 42, and the rotating shaft can contact the ball 421 when moving towards the ball 421;

[0054] When the rotating shaft is pushed into the V-shaped clamping jaw 32 along the axial direction and contacts the stop rod 42 and is positioned, the horizontal frame 22 can be lowered under the action of the tension spring 43, so that the bottom end of the bent rod 41 slides in the straight slot 44, thereby driving the bent rod 41 to lower, and when the bent rod 41 lowers to the bottom end, the horizontal frame 22 can continue to lower to clamp and fix the rotating shaft, and at this time, the rotating shaft and the stop rod 42 are misaligned in the axial direction, which facilitates the subsequent drilling or boring operation of the drilling or boring equipment on the rotating shaft.

[0055] The setting of the ball 421 can reduce the friction between the end face of the rotating shaft and the stop rod 42, and ensure that the tension of the tension spring 43 can stably pull the stop rod 42 to rotate downward.

[0056] The working principle and use process of the present application are as follows:

[0057] First, the rotating shaft is pushed along the axial direction and placed on the two groups of V-shaped clamping jaws 32 for support, and under the cooperation of the vertical rod 23 and the frame body 11, the horizontal frame 22 is lowered by the hydraulic rod 21, and when the V-shaped clamping jaw 31 is pressed against the top plate 341, the hydraulic oil in the top plate 341 is input into the piston rod 36 through the communication pipe 35 to lift the V-shaped clamping jaw 32, and when the diameters of the rotating shafts to be fixed are different, the V-shaped clamping jaw 31 lowers to different distances, and at this time, the corresponding V-shaped clamping jaw 32 is lifted to different heights, so that the axial center height of the rotating shaft can always be kept uniform when the rotating shaft is clamped.

[0058] When the horizontal frame 22 goes down, the bent rod two 53 and the elastic hook 54 will also go down. Since the hook-shaped end 52 is inclined downward toward the elastic hook 54, the elastic hook 54 can hook the hook-shaped end 52 when it goes down. When the horizontal frame 22 is reset by going up, the hook-shaped end 52 can be lifted by the bent rod two 53 and the elastic hook 54, so that the J-shaped rod 51 rotates around the shaft and the shaft is lifted. When the shaft rolls out along the straight part of the J-shaped rod 51, the inclination angle of the J-shaped rod 51 becomes larger, so that the inclination direction of the hook-shaped end 52 is reversed. At this time, the elastic hook 54 will be unhooked, so that the J-shaped rod 51 is reset for the next work.

[0059] When the shaft is pushed into the V-shaped clamping jaw two 32 in the axial direction, it will contact the stop rod 42 to achieve positioning. When the horizontal frame 22 goes down, the stop rod 42 will rotate downward under the action of the tension spring 43. At this time, the bottom end of the bent rod one 41 will slide in the straight slot 44, so as to drive the bent rod one 41 to go down. When the bent rod one 41 goes down to the bottom end, the horizontal frame 22 can continue to go down to clamp and fix the shaft. At this time, the shaft is dislocated with the stop rod 42 in the axial direction, which facilitates the subsequent drilling or boring operation of the drilling or boring equipment on the shaft.

[0060] It should be noted that the relational terms herein 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 such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic processing device for producing rotating shafts, comprising a base plate (1) and a self-adaptive clamping assembly (3), a frame body one (11) is fixedly connected to the top of the base plate (1), and a hydraulic assembly (2) is installed on the frame body one (11), characterized in that: the self-adaptive clamping assembly (3) comprises two groups of V-shaped clamping jaws one (31) symmetrically installed at the bottom of the hydraulic assembly (2), two groups of V-shaped clamping jaws two (32) are arranged above the base plate (1) and below the V-shaped clamping jaws one (31), and the V-shaped clamping jaws one (31) and the V-shaped clamping jaws two (32) are staggered in the vertical direction, two groups of four support seats (33) are symmetrically fixedly connected to the top of the base plate (1), a piston rod one (34) in an initial elongated state and a piston rod two (36) in an initial contracted state are fixedly connected to the top of the support seat (33), and the piston rod one (34) and the piston rod two (36) are the same size, a communication pipe (35) is fixedly connected to the bottom end of the piston rod one (34) in communication, the other end of the communication pipe (35) communicates with the bottom end of the piston rod one (34), and a top plate (341) is fixedly connected to the top of the piston rod one (34); the bottom of the top plate (341) coincides with the bottom end of the V-shaped clamping jaw one (31) in the vertical direction; elastic sliding blocks (311) are movably connected to the two sides of the V-shaped clamping jaw one (31), the elastic sliding blocks (311) have a tendency to move towards the end of the V-shaped clamping jaw one (31), and convex shafts one (312) with a length greater than the width of the V-shaped clamping jaw one (31) are further fixedly connected to the elastic sliding blocks (311); the V-shaped clamping jaw two (32) is provided with a guide groove (321) and an opening (322) on the top of the guide groove (321) and in communication with the guide groove (321), the opening (322) is initially located directly below the convex shaft one (312), and the convex shaft one (312) can slide in the opening (322) when descending; the height difference between the center of the top end of the guide groove (321) and the upper surface of the top plate (341) is H, and the height difference between the axis of the convex shaft one (312) and the bottom end of the V-shaped clamping jaw one (31) is H; the hydraulic assembly (2) comprises a hydraulic rod (21) fixedly connected to the top of the frame body one (11), a cross frame (22) is fixedly connected to the bottom of the hydraulic rod (21), vertical rods two (23) are symmetrically fixedly connected to the upper surface of the cross frame (22) and located on both sides of the hydraulic rod (21), and the vertical rods two (23) are vertically sleeved on the frame body one (11); the V-shaped clamping jaw one (31) is fixedly connected to the bottom of the cross frame (22); a frame body two (12) is fixedly connected to the top of the base plate (1) and located in the staggered symmetrical direction of the frame body one (11), and a blanking assembly (5) is further arranged on the top of the frame body two (12); the blanking assembly (5) comprises a J-shaped rod (51) hingedly connected to the top of the frame body two (12), a hook-shaped end (52) is formed at the bottom end of the J-shaped rod (51), a bent rod two (53) is fixedly connected to the top of the cross frame (22) and located above the J-shaped rod (51), and an elastic hook piece (54) is hingedly connected to the bottom of the bent rod two (53). ​ ​ ​ ​ ​ ​ ​ ​ ​ One side of the frame two (12) is fixedly connected with a support rod (13) for supporting the bottom of the J-shaped rod (51), and the same horizontal plate (511) is fixedly connected on the J-shaped rod (51) of the two groups of blanking assemblies (5), and the elastic hook piece (54) can hook the hook-shaped end (52) when descending.

2. The automatic processing device for producing a pivot according to claim 1, characterized in that: The included angle of the V-shaped clamping jaw one (31) and the V-shaped clamping jaw two (32) is equal, and the included angle is less than 90°.

3. The automatic processing device for producing a pivot according to claim 1, characterized in that: The top of one end of the cross frame (22) is fixedly connected with a vertical rod one (221), the frame one (11) is fixedly connected with a connecting shaft (111), and the end of the connecting shaft (111) is provided with a limiting assembly (4); The limiting assembly (4) comprises a blocking rod piece (42) hinged to the end of the connecting shaft (111), the outer periphery of the vertical rod one (221) movably sheaths a bent rod one (41), a straight slot (44) is formed in the blocking rod piece (42), the bottom end of the bent rod one (41) can slide in the straight slot (44), a tension spring (43) is fixedly connected to the lower surface of the blocking rod piece (42), and the other end of the tension spring (43) is fixedly connected with the top of the bottom plate (1), the bottom end of the blocking rod piece (42) is disc-shaped, and the center of the disc is opposite to the axis of the shaft body; The blocking rod piece (42) is always in an inclined state, the top of the cross frame (22) abuts against the top end of the bent rod one (41) in the initial state, so that the tension spring (43) is in a stretched state.

4. The automatic processing device for producing a pivot according to claim 3, characterized in that: The bottom end of the blocking rod piece (42) movably connects a ball (421) with a diameter greater than the thickness of the blocking rod piece (42), and the rotating shaft can contact the ball (421) when moving towards the ball (421).

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