Horizontal testing fixture suitable for automobile steering knuckle and use method of horizontal testing fixture

Abstract

The invention discloses a horizontal testing fixture suitable for an automobile steering knuckle and a use method thereof, and relates to the technical field of automobile steering knuckles, the horizontal testing fixture comprises a support base, and the horizontal testing fixture also comprises a support frame fixedly connected to the top of the support base; the steering knuckle containing table is fixedly connected to the top of the supporting base, and the steering knuckle containing table is not located below the supporting frame. The steering knuckle positioning plate is connected to the top of the steering knuckle placing table in a sliding manner; the steering knuckle is placed in the groove of the steering knuckle placement table, the steering knuckle can be fixed and prevented from displacement by controlling the manual pull plate to descend, and meanwhile, the electric push rod is controlled to work, the electric push rod can control the three steering knuckle detection columns to descend and extend into the coaxial hole of the steering knuckle, so that the detection accuracy is improved. And penetration detection is carried out in the coaxial hole to prevent the steering knuckle from being blocked to affect use.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile steering knuckles, in particular to a horizontal testing fixture suitable for automobile steering knuckles and a use method thereof. BACKGROUND

[0002] In the prior art, an automobile steering knuckle is one of main parts on an automobile steering bridge, can make the automobile travel stably and transmit the travel direction sensitively, the steering knuckle functions to bear the load of the front part of the automobile, supports and drives the front wheel to rotate around the kingpin so that the automobile turns. In the automobile travel state, the steering knuckle bears variable impact load, therefore, the steering knuckle is required to have high strength, the steering transmission shaft is composed of the steering knuckle and a transmission shaft, and sometimes, an intermediate support is additionally arranged, the steering knuckle is mainly used for transmitting the torque and the rotating motion between two shafts with the relative positions changing constantly in the working process, and the steering knuckle can be divided into rigid steering knuckles and flexible steering knuckles according to whether the torsion direction has obvious elasticity.

[0003] In the prior art, the coaxial hole in the automobile steering knuckle lacks detection after the automobile steering knuckle is produced, which influences the subsequent use.

[0004] Therefore, the application provides a horizontal testing fixture suitable for automobile steering knuckles and a use method thereof to solve the above problems. SUMMARY

[0005] The application aims to provide a horizontal testing fixture suitable for automobile steering knuckles and a use method thereof to solve the problems in the background.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a horizontal testing fixture suitable for automobile steering knuckles, comprising a supporting base, the horizontal testing fixture further comprises: A supporting frame is fixedly connected to the top of the supporting base; A steering knuckle placing table is fixedly connected to the top of the supporting base, and the steering knuckle placing table is located below the supporting frame; A steering knuckle positioning plate is slidingly connected to the top of the steering knuckle placing table; A contact positioning plate is fixedly connected to the top of the steering knuckle placing table, and the contact positioning plate cooperates with the steering knuckle positioning plate; An auxiliary plate is fixedly connected to the front side of the supporting frame; A hollow plate is fixedly connected to the front side of the auxiliary plate, and a moving frame is slidingly connected in the hollow plate; Three steering knuckle detection columns are fixedly connected to the bottom of the moving frame; The matching frame is slidingly connected to the top of the supporting base, and the left side of the matching frame is fixedly connected to the right side of the steering knuckle positioning plate. The top of the supporting base is provided with an auxiliary mechanism and a detection mechanism.

[0007] Preferably, the auxiliary mechanism comprises an L-shaped plate, two rotating columns and an annular belt, the L-shaped plate is slidingly connected to the top of the supporting base, the rotating columns are rotatably connected to the bottom of the steering knuckle placing table, and the annular belt is sleeved on the outer walls of the two rotating columns, and the outer wall of the annular belt is fixedly connected to the front side of the L-shaped plate and the rear side of the matching frame.

[0008] Further, the auxiliary mechanism moves by controlling the L-shaped plate, at this time, the L-shaped plate can control the annular belt to rotate, and the annular belt rotates to control the matching frame to move to the right.

[0009] Preferably, the bottom of the steering knuckle placing table is fixedly connected with an auxiliary frame, the right inner side of the auxiliary frame is slidingly connected with a manual pull plate, the bottom of the manual pull plate is fixedly connected with a second spring, and one end of the second spring is fixedly connected to the inner wall of the bottom of the auxiliary frame.

[0010] Further, by setting the second spring, the second spring can assist the manual pull plate to rise back by its elastic force.

[0011] Preferably, the front side of the manual pull plate is slidingly connected with an extension locking plate, the left side of the extension locking plate is fixedly connected with a first spring, one end of the first spring is fixedly connected to the front side of the manual pull plate, the right side of the auxiliary frame is provided with an extension hole, and the extension locking plate is movably connected with the extension hole.

[0012] Further, by setting the first spring, the first spring can assist the extension locking plate to penetrate the extension hole by its elastic force, so as to realize the effect of limiting the movement of the manual pull plate, and the whole device can be locked.

[0013] Preferably, the front side of the manual pull plate is rotatably connected with a connecting rod, and the bottom of the connecting rod is rotatably connected to the front side of the L-shaped plate.

[0014] Further, when the manual pull plate moves, the manual pull plate can push the connecting rod to move, at this time, the connecting rod can push the L-shaped plate to move to the left.

[0015] Preferably, the detection mechanism comprises an electric push rod bracket, an electric push rod, a vertical plate, a driving frame, a T-shaped plate and a push rod, the electric push rod bracket is slidably connected to the rear side of the support frame, the electric push rod is fixedly connected to the top of the electric push rod bracket, the vertical plate is fixedly connected to the left end of the output end of the electric push rod, the driving frame is slidably connected to the front side of the auxiliary plate, the T-shaped plate is fixedly connected to the right side of the driving frame and is in movable contact with the vertical plate, and the push rod is rotatably connected to the front side of the driving frame and is rotatably connected to the front side of the moving frame.

[0016] Further, the detection mechanism moves by controlling the electric push rod bracket, the electric push rod bracket can control the electric push rod to descend, at this time the electric push rod works and can control the T-shaped plate to move through the vertical plate, at this time the T-shaped plate pulls the driving frame to move, thereby pushing the push rod to move.

[0017] Preferably, the front side of the matching frame is rotatably connected with a rotating rod, and the top of the rotating rod is rotatably connected with the rear side of the electric push rod bracket.

[0018] Further, when the matching frame moves, the matching frame can pull the rotating rod to move, and the rotating rod can pull the electric push rod bracket to descend.

[0019] Preferably, the top of the knuckle placing table is provided with a groove, and the groove is matched with the knuckle positioning plate and the contact positioning plate.

[0020] Further, by arranging the groove, the groove has the effect of preventing the knuckle.

[0021] The application also provides a use method of the horizontal detection tool suitable for the automobile knuckle, which comprises the following steps: S1: first, place the knuckle in the groove of the knuckle placing table, at this time pull down the manual pull plate by the worker, and the manual pull plate can push the connecting rod to move, at this time the connecting rod can push the L-shaped plate to move leftward; S2: then the L-shaped plate can control the annular belt to rotate, by controlling the annular belt to rotate, the annular belt can control the matching frame to move rightward, and the matching frame can pull the knuckle positioning plate to move rightward, at this time the knuckle positioning plate can be matched with the contact positioning plate to position the knuckle; S3: and the manual pull plate 5 can pull down the extension locking plate, the No. 1 spring is in the compressed state initially, can push the extension locking plate to penetrate the extension hole, so as to ensure the stability of the knuckle positioning; S4: then the matching frame can pull the rotating rod to move, at this time the rotating rod can pull the electric push rod bracket to descend, and the electric push rod bracket can pull the electric push rod to descend, at this time the electric push rod can guide the vertical plate to descend; S5: the electric push rod can drive the vertical plate to move right, at this time, the vertical plate can contact with the T-shaped plate, so as to control the T-shaped plate to move right, at the same time, the T-shaped plate can pull the driving frame to move right, at this time, the driving frame can push the push rod to move, and the push rod can push the moving frame to descend, at this time, the moving frame can drive the three knuckle detection columns to descend and extend into the coaxial holes of the knuckle, so as to detect the coaxial holes, prevent the knuckle from being blocked, and affect use.

[0022] In summary, the technical effects and advantages of the present application are: 1. The knuckle is placed in the groove of the knuckle placing table, the manual pull plate is controlled to descend, at this time, the manual pull plate can assist the knuckle positioning plate to move, with the movement of the knuckle positioning plate, the knuckle positioning plate can cooperate with the contact positioning plate, so as to realize the positioning effect of the knuckle, and ensure stability. 2. At the same time, the electric push rod is guided to descend, the electric push rod is controlled to work, the electric push rod can control the vertical plate to move, the vertical plate can guide the three knuckle detection columns to descend and extend into the coaxial holes of the knuckle, so as to detect the coaxial holes, prevent the knuckle from being blocked, and affect use.

[0023] Beneficial effects: the knuckle is placed in the groove of the knuckle placing table, at this time, the manual pull plate is controlled to descend, so as to fix the knuckle and prevent displacement, at the same time, the electric push rod is controlled to work, the electric push rod can control the three knuckle detection columns to descend and extend into the coaxial holes of the knuckle, so as to detect the coaxial holes, prevent the knuckle from being blocked, and affect use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the embodiment of the present application; Figure 2 It is a three-dimensional structure diagram of the manual pull plate and the extension locking plate of the embodiment of the present application; Figure 3 It is a three-dimensional structure diagram of the cooperation frame, the rotating rod and the electric push rod supporting plate of the embodiment of the present application; Figure 4 It is a three-dimensional structure diagram of the knuckle placing table of the embodiment of the present application; Figure 5 It is an enlarged structure diagram of the A structure of the embodiment of the present application.

[0025] In the figure: 1, support base; 2, support frame; 3, knuckle placing table; 4, auxiliary frame; 5, manual pull plate; 6, extension locking plate; 7, No. 1 spring; 8, connecting rod; 9, L-shaped plate; 10, rotating column; 11, annular belt; 12, matching frame; 13, knuckle positioning plate; 14, contact positioning plate; 15, rotating rod; 16, electric push rod supporting plate; 17, electric push rod; 18, vertical plate; 19, driving frame; 20, T-shaped plate; 21, auxiliary plate; 22, push rod; 23, hollow plate; 24, moving frame; 25, knuckle detection column; 26, No. 2 spring. DETAILED DESCRIPTION

[0026] 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0027] REFERENCE Figures 1-5 In the embodiment, a horizontal testing fixture suitable for automobile knuckles is provided, which comprises a support base 1, and further comprises: A support frame 2 is fixedly connected to the top of the support base 1. A knuckle placing table 3 is fixedly connected to the top of the support base 1, and the knuckle placing table 3 is located below the support frame 2. A knuckle positioning plate 13 is slidably connected to the top of the knuckle placing table 3. A contact positioning plate 14 is fixedly connected to the top of the knuckle placing table 3, and the contact positioning plate 14 cooperates with the knuckle positioning plate 13. An auxiliary plate 21 is fixedly connected to the front side of the support frame 2. A hollow plate 23 is fixedly connected to the front side of the auxiliary plate 21, and the moving frame 24 is slidably connected in the hollow plate 23. Three knuckle detection columns 25 are fixedly connected to the bottom of the moving frame 24. A matching frame 12 is slidably connected to the top of the support base 1, and the left side of the matching frame 12 is fixedly connected to the right side of the knuckle positioning plate 13. The top of the support base 1 is provided with an auxiliary mechanism and a detection mechanism.

[0028] In the embodiment, the auxiliary mechanism includes an L-shaped plate 9, two rotating columns 10 and an annular belt 11. The L-shaped plate 9 is slidingly connected to the top of the support base 1. The rotating columns 10 are rotatably connected to the bottom of the steering knuckle placing table 3. The annular belt 11 is sleeved on the outer walls of the two rotating columns 10. The outer wall of the annular belt 11 is fixedly connected to the front side of the L-shaped plate 9 and the rear side of the matching frame 12. The auxiliary mechanism moves by controlling the L-shaped plate 9. At this time, the L-shaped plate 9 can control the annular belt 11 to rotate. By controlling the rotation of the annular belt 11, the annular rotation of the annular belt 11 can control the matching frame 12 to move to the right.

[0029] In the embodiment, the bottom of the steering knuckle placing table 3 is fixedly connected with an auxiliary frame 4. The right side of the auxiliary frame 4 is slidingly connected with a manual pull plate 5. The bottom of the manual pull plate 5 is fixedly connected with a No. 2 spring 26. One end of the No. 2 spring 26 is fixedly connected to the inner wall of the bottom of the auxiliary frame 4. By arranging the No. 2 spring 26, the No. 2 spring 26 can assist the manual pull plate 5 to rise back by its own elastic force.

[0030] In the embodiment, the front side of the manual pull plate 5 is slidingly connected with an extension locking plate 6. The left side of the extension locking plate 6 is fixedly connected with a No. 1 spring 7. One end of the No. 1 spring 7 is fixedly connected to the front side of the manual pull plate 5. The right side of the auxiliary frame 4 is provided with an extension hole. The extension locking plate 6 is movably connected with the extension hole. By arranging the No. 1 spring 7, the No. 1 spring 7 can assist the extension locking plate 6 to penetrate the extension hole by its own elastic force, so as to achieve the effect of limiting the movement of the manual pull plate 5, and the whole device can be locked.

[0031] In the embodiment, the front side of the manual pull plate 5 is rotatably connected with a connecting rod 8. The bottom of the connecting rod 8 is rotatably connected with the front side of the L-shaped plate 9. When the manual pull plate 5 moves, the manual pull plate 5 can push the connecting rod 8 to move. At this time, the connecting rod 8 can push the L-shaped plate 9 to move to the left.

[0032] In the embodiment, the detection mechanism includes an electric push rod supporting plate 16, an electric push rod 17, a vertical plate 18, a driving frame 19, a T-shaped plate 20 and a push rod 22. The electric push rod supporting plate 16 is slidingly connected to the rear side of the support frame 2. The electric push rod 17 is fixedly connected to the top of the electric push rod supporting plate 16. The vertical plate 18 is fixedly connected to the left end of the output end of the electric push rod 17. The driving frame 19 is slidingly connected to the front side of the auxiliary plate 21. The T-shaped plate 20 is fixedly connected to the right side of the driving frame 19 and movably contacts with the vertical plate 18. The push rod 22 is rotatably connected to the front side of the driving frame 19 and rotatably connected to the front side of the moving frame 24. The detection mechanism moves by controlling the electric push rod supporting plate 16. The electric push rod supporting plate 16 can control the electric push rod 17 to descend. At this time, the electric push rod 17 can control the T-shaped plate 20 to move through the vertical plate 18. At this time, the T-shaped plate 20 pulls the driving frame 19 to move, and then pushes the push rod 22 to move.

[0033] In the embodiment, the front side of the cooperation frame 12 is rotationally connected with a rotating rod 15, and the top of the rotating rod 15 is rotationally connected with the rear side of the electric push rod supporting plate 16; when the cooperation frame 12 moves, the cooperation frame 12 can pull the rotating rod 15 to move, and the rotating rod 15 can pull the electric push rod supporting plate 16 to descend.

[0034] In the embodiment, the top of the knuckle placing table 3 is provided with a groove, and the groove is matched with the knuckle positioning plate 13 and the contact positioning plate 14; by arranging the groove, the groove can prevent the knuckle.

[0035] Working principle: in actual work, the knuckle is placed in the groove of the knuckle placing table 3; at this time, the manual pull plate 5 is pulled to descend by the worker; when the manual pull plate 5 moves, the manual pull plate 5 can push the connecting rod 8 to move; at this time, with the movement of the connecting rod 8, the connecting rod 8 can push the L-shaped plate 9 to move to the left; when the L-shaped plate 9 moves, the L-shaped plate 9 can control the annular belt 11 to rotate; by controlling the rotation of the annular belt 11, the annular belt 11 can control the cooperation frame 12 to move to the right; when the cooperation frame 12 moves, the cooperation frame 12 can pull the knuckle positioning plate 13 to move to the right; at this time, the knuckle positioning plate 13 can be matched with the contact positioning plate 14 to position the knuckle; at the same time, with the movement of the manual pull plate 5, the manual pull plate 5 can drive the extension locking plate 6 to descend; the No. 1 spring 7 is initially in a compressed state, can push the extension locking plate 6 to penetrate the extension hole, so as to ensure the stability of the knuckle positioning; at the same time, with the movement of the cooperation frame 12, the cooperation frame 12 can pull the rotating rod 15 to move; at this time, the rotating rod 15 can pull the electric push rod supporting plate 16 to descend; with the movement of the electric push rod supporting plate 16, the electric push rod supporting plate 16 can drive the electric push rod 17 to descend; at this time, the electric push rod 17 can guide the vertical plate 18 to descend; at the same time, the electric push rod 17 is controlled to work, and the electric push rod 17 can drive the vertical plate 18 to move to the right; at this time, the vertical plate 18 can be in contact with the T-shaped plate 20, so as to control the T-shaped plate 20 to move to the right; when the T-shaped plate 20 moves, the T-shaped plate 20 can pull the driven frame 19 to move to the right; at this time, the driven frame 19 can push the push rod 22 to move; when the push rod 22 moves, the push rod 22 can push the moving frame 24 to descend; at this time, the movement of the moving frame 24 can drive the three knuckle detection columns 25 to descend and extend into the coaxial holes of the knuckle, so as to penetrate and detect the coaxial holes, prevent the knuckle from being blocked, and affect the use.

[0036] The application further provides a use method of the horizontal detection tool for the automobile knuckle. S1: First, the knuckle is placed in the groove of the knuckle placing table 3, at this time, the manual pull plate 5 is pulled down by the staff, and the manual pull plate 5 can push the connecting rod 8 to move, at this time, the connecting rod 8 can push the L-shaped plate 9 to move to the left; S2: Then the L-shaped plate 9 can control the ring-shaped belt 11 to rotate, by controlling the ring-shaped belt 11 to rotate, the ring-shaped belt 11 can control the matching frame 12 to move to the right, and the matching frame 12 can pull the knuckle positioning plate 13 to move to the right, at this time, the knuckle positioning plate 13 can cooperate with the contact positioning plate 14 to position the knuckle; S3: And the manual pull plate 5 can drive the extension locking plate 6 to descend, the No. 1 spring 7 is initially in a compressed state, which can push the extension locking plate 6 to penetrate the extension hole, so as to ensure the stability of the knuckle positioning; S4: Then the matching frame 12 can pull the rotating rod 15 to move, at this time, the rotating rod 15 can pull the electric push rod supporting plate 16 to descend, and the electric push rod supporting plate 16 can drive the electric push rod 17 to descend, at this time, the electric push rod 17 can guide the vertical plate 18 to descend; S5: The electric push rod 17 can drive the vertical plate 18 to move to the right, at this time, the vertical plate 18 can contact with the T-shaped plate 20, so as to control the T-shaped plate 20 to move to the right, at the same time, the T-shaped plate 20 can pull the driven frame 19 to move to the right, at this time, the driven frame 19 can push the push rod 22 to move, and the push rod 22 can push the moving frame 24 to descend, at this time, the moving frame 24 moves can drive the three knuckle detection columns 25 to descend and extend into the coaxial hole of the knuckle, to penetrate and detect the coaxial hole, prevent the knuckle from being blocked, and affect the use.

[0037] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application have been described in detail, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A horizontal testing fixture suitable for use with an automotive steering knuckle, comprising a support base (1), characterised in that, The horizontal testing tool further comprises: A support frame (2) is fixedly connected to the top of the support base (1); A knuckle placing table (3) is fixedly connected to the top of the support base (1), and the knuckle placing table (3) is below the support frame (2); A knuckle positioning plate (13) is slidingly connected to the top of the knuckle placing table (3); A contact positioning plate (14) is fixedly connected to the top of the knuckle placing table (3), and the contact positioning plate (14) cooperates with the knuckle positioning plate (13); An auxiliary plate (21) is fixedly connected to the front side of the support frame (2); A hollow plate (23) is fixedly connected to the front side of the auxiliary plate (21), and a moving frame (24) is slidingly connected in the hollow plate (23); Three knuckle detection columns (25) are fixedly connected to the bottom of the moving frame (24); A matching frame (12) is slidingly connected to the top of the support base (1), and the left side of the matching frame (12) is fixedly connected to the right side of the knuckle positioning plate (13); The top of the support base (1) is provided with an auxiliary mechanism and a detection mechanism.

2. The horizontal testing fixture suitable for automobile steering knuckle according to claim 1, wherein, The auxiliary mechanism comprises an L-shaped plate (9), two rotating columns (10) and an annular belt (11), the L-shaped plate (9) is slidingly connected to the top of the support base (1), the rotating column (10) is rotatably connected to the bottom of the knuckle placing table (3), and the annular belt (11) is sleeved on the outer wall of the two rotating columns (10), and the outer wall of the annular belt (11) is fixedly connected to the front side of the L-shaped plate (9) and the rear side of the matching frame (12).

3. The horizontal testing fixture suitable for use with an automotive steering knuckle as defined in claim 1, wherein: The bottom of the knuckle placing table (3) is fixedly connected with an auxiliary frame (4), the right side of the auxiliary frame (4) is slidingly connected with a manual pull plate (5), the bottom of the manual pull plate (5) is fixedly connected with a second spring (26), and one end of the second spring (26) is fixedly connected with the inner wall of the bottom of the auxiliary frame (4).

4. The horizontal testing fixture suitable for use with an automotive steering knuckle as defined in claim 3, wherein: The front side of the manual pull plate (5) is slidingly connected with an extension locking plate (6), the left side of the extension locking plate (6) is fixedly connected with a first spring (7), one end of the first spring (7) is fixedly connected with the front side of the manual pull plate (5), the right side of the auxiliary frame (4) is provided with an extension hole, and the extension locking plate (6) is movably connected with the extension hole.

5. The horizontal testing fixture suitable for use with an automotive steering knuckle as defined in claim 2, wherein: The front side of the manual pull plate (5) is rotatably connected with a connecting rod (8), and the bottom of the connecting rod (8) is rotatably connected with the front side of the L-shaped plate (9).

6. The horizontal testing fixture suitable for use with an automotive steering knuckle as defined in claim 1, wherein: The detection mechanism comprises an electric push rod bracket (16), an electric push rod (17), a vertical plate (18), a driving frame (19), a T-shaped plate (20) and a push rod (22), the electric push rod bracket (16) is slidably connected to the rear side of the support frame (2), the electric push rod (17) is fixedly connected to the top of the electric push rod bracket (16), the vertical plate (18) is fixedly connected to the left end of the output end of the electric push rod (17), the driving frame (19) is slidably connected to the front side of the auxiliary plate (21), the T-shaped plate (20) is fixedly connected to the right side of the driving frame (19), and the T-shaped plate (20) is in movable contact with the vertical plate (18), and the push rod (22) is rotatably connected to the front side of the driving frame (19), and the bottom of the push rod (22) is rotatably connected to the front side of the moving frame (24).

7. The horizontal testing fixture suitable for use with an automotive steering knuckle as defined in claim 6, wherein: The front side of the matching frame (12) is rotatably connected with a rotating rod (15), and the top of the rotating rod (15) is rotatably connected with the rear side of the electric push rod bracket (16).

8. The horizontal testing fixture suitable for use with an automotive steering knuckle according to claim 1, wherein: The top of the knuckle placing table (3) is provided with a groove, and the groove is matched with the knuckle positioning plate (13) and the contact positioning plate (14).

9. A method of using a horizontal testing fixture for an automotive steering knuckle, the method comprising: placing the steering knuckle on the horizontal testing fixture; and rotating the steering knuckle about a vertical axis of the horizontal testing fixture. The method comprises the following steps: S1: first, place the knuckle in the groove of the knuckle placing table (3), at this time, pull down the manual pull plate (5) by the staff, and the manual pull plate (5) can push the connecting rod (8) to move, at this time, the connecting rod (8) can push the L-shaped plate (9) to move leftwards; S2: then, the L-shaped plate (9) can control the annular belt (11) to rotate, by controlling the rotation of the annular belt (11), the annular belt (11) can control the matching frame (12) to move rightwards, and at the same time, the matching frame (12) can pull the knuckle positioning plate (13) to move rightwards, at this time, the knuckle positioning plate (13) can be matched with the contact positioning plate (14) to position the knuckle; S3: and the manual pull plate 5 can drive the extension locking plate (6) to descend, the first spring (7) is initially in a compressed state, and can push the extension locking plate (6) to penetrate the extension hole, so as to ensure the stability of the knuckle positioning; S4: then, the matching frame (12) can pull the rotating rod (15) to move, at this time, the rotating rod (15) can pull the electric push rod bracket (16) to descend, and the electric push rod bracket (16) can drive the electric push rod (17) to descend, at this time, the electric push rod (17) can guide the vertical plate (18) to descend; S5: the electric push rod (17) can drive the vertical plate (18) to move rightwards, at this time, the vertical plate (18) can be in contact with the T-shaped plate (20), so as to control the T-shaped plate (20) to move rightwards, at the same time, the T-shaped plate (20) can pull the driving frame (19) to move rightwards, at this time, the driving frame (19) can push the push rod (22) to move, and the push rod (22) can push the moving frame (24) to descend, at this time, the movement of the moving frame (24) can drive the three knuckle detection columns (25) to descend and extend into the coaxial holes of the knuckles, so as to penetrate and detect the coaxial holes, prevent the knuckles from being blocked, and affect the use.

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