A multi-directional self-locking clamp for automobile steering knuckle machining

Abstract

The utility model discloses a kind of multi-direction self-locking clamps for automobile steering knuckle processing, including clamping body bottom plate and overboard, overboard is installed with angular pin, angular pin is movably installed in the inside of clamping body bottom plate;The top of the clamping body bottom plate is detachably installed with lathe clamping body, positioning structure is connected on lathe clamping body, the top of lathe clamping body is connected with two groups of compression structure and two groups of adaptive structure;The utility model, by the cooperation of coarse guide block and profiling positioning block can be realized to the coarse positioning of automobile steering knuckle blank, then through the lever cylinder inside install seat one, install seat two and install seat three, corresponding dynamic steel ball screw is pressed on steering knuckle blank surface, when steering knuckle blank is pressed, its bottom floating ball pin one and floating ball pin two will be lifted adaptive, to adapt to the ups and downs of steering knuckle blank surface, eliminate local stress, realize the quick positioning of steering knuckle blank clamping.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology for automotive parts, specifically a multi-directional self-locking fixture for machining automotive steering knuckles. Background Technology

[0002] The steering knuckle is a key component of a car's steering system, connecting the wheels to the front axle (or steering axle) and transmitting the rotation of the steering wheel to the wheels through the steering transmission mechanism.

[0003] In the existing technology, when machining automotive steering knuckles, clamping is required. However, traditional clamping uses single-point clamping, which leads to local stress concentration. Moreover, it relies on manual adjustment of the pressure plate position. When machining complex steering knuckles at multiple angles, the pressure plate needs to be changed frequently, which prolongs the clamping time and changeover time. Traditional steering knuckle clamps rely on gratings and force sensors for error compensation, which is costly and complex to maintain. Therefore, a multi-directional self-locking clamp for machining automotive steering knuckles is needed to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-directional self-locking fixture for machining automotive steering knuckles, in order to solve the problems mentioned in the background art, such as the single-point clamping of automotive steering knuckle fixtures leading to local stress concentration, reliance on manual adjustment which prolongs clamping and changeover time, and the high cost and complex maintenance of traditional steering knuckle fixtures which rely on gratings and force sensors for error compensation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-directional self-locking fixture for machining automotive steering knuckles, comprising a fixture base plate and an intermediate plate, wherein an angular pin is installed on the intermediate plate and the angular pin is movably installed inside the fixture base plate; a lathe fixture is detachably installed above the fixture base plate, a positioning structure is connected to the lathe fixture, two sets of clamping structures and two sets of adapting structures are connected above the lathe fixture, and several counterweight blocks I and several counterweight blocks II are detachably installed on the fixture base plate.

[0006] Preferably, the positioning structure includes several coarse guide blocks, which are detachably installed above the lathe fixture. A contour block seat is installed above the lathe fixture, and a contour positioning block is detachably installed on the contour block seat.

[0007] Preferably, the coarse guide block has an internal mounting hole, and a mounting screw is movably mounted on the coarse guide block. One end of the mounting screw passes through the mounting hole and is threaded into the lathe fixture.

[0008] Preferably, the positioning structure further includes several adjusting rod seats, with adjusting screws installed internally on the adjusting rod seats. One end of the adjusting screw contacts the surface of the lathe fixture body. A positioning screw is movably installed inside the adjusting rod seat, with one end of the positioning screw passing through the adjusting rod seat and threadedly installed inside the fixture body base plate. A cover plate is detachably installed inside the lathe fixture body.

[0009] Preferably, the clamping structure includes mounting base one, mounting base two, and mounting base three. Mounting base one, mounting base two, and mounting base three can all be detachably mounted on the upper part of the lathe fixture. Each of mounting base one, mounting base two, and mounting base three has a lever cylinder installed inside. Each of the three lever cylinders has a pressure plate rotatably mounted on its output end. Each of the three pressure plates has a moving steel ball screw installed on its three pressure plates. Each of the three pressure plates has a connecting rod rotatably mounted on one side. Each of the three connecting rods has a pressure plate base rotatably mounted on its three ends. The three pressure plate bases are respectively rotatably mounted on mounting base one, mounting base two, and mounting base three.

[0010] Preferably, each of the three pressure plate bases has a limit screw threaded inside, and the three limit screws are in contact with the corresponding mounting base one, mounting base two and mounting base three respectively.

[0011] Preferably, an oil passage and an oil passage plug are detachably installed on one side of each of the two mounting bases.

[0012] Preferably, the adaptive structure includes three floating ball pin seats 1 and 2. The three floating ball pin seats 1 are respectively mounted on mounting base 1, mounting base 2 and mounting base 3. The floating ball pin seats 2 are mounted on the base plate of the clamping body. Floating ball pin 1 is slidably installed inside each of the three floating ball pin seats 1 and floating ball pin 2 is slidably installed inside each of the three floating ball pin seats 1 and 2. A limiting screw is threadedly installed inside each of the three floating ball pin seats 1 and 2. A limiting groove 1 is opened inside each of the three floating ball pin seats 1 and 2. A limiting groove 2 is opened inside each of the four floating ball pin seats 2. The four limiting screws are slidably installed in the corresponding limiting grooves 1 and 2. Springs are installed inside each of the three floating ball pin seats 1 and 2. One end of each of the four springs is respectively mounted on the base plate of the clamping body, mounting base 1, mounting base 2 and mounting base 3.

[0013] Preferably, both the first floating ball pin seat and the second floating ball pin seat can be detachably fitted with dust covers. Both dust covers have screw holes inside. The first floating ball pin seat and the second floating ball pin seat have limit holes inside. The limit holes on the same side are connected to the screw holes.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) This utility model utilizes the cooperation of the coarse guide block and the contour positioning block to achieve coarse positioning of the automotive steering knuckle blank. Then, through the lever cylinder inside the openable mounting seat 1, mounting seat 2 and mounting seat 3, the corresponding moving steel ball screw is driven to press on the surface of the steering knuckle blank. When the steering knuckle blank is pressed, the floating ball pin 1 and floating ball pin 2 at its bottom will rise and fall to adapt, thereby adapting to the undulations of the steering knuckle blank surface, eliminating local stress, and realizing high-precision, high-rigidity, fast clamping and high-efficiency processing under sensorless conditions. It is suitable for large-scale precision production of complex steering knuckles.

[0016] (2) Mounting base one, mounting base two and mounting base three are all bolted to the lathe fixture and adopt a modular design so that they can be selectively disassembled and assembled according to processing needs. By rotating the pressure plate base, it can drive the corresponding moving steel ball screw to rotate, changing the position and orientation of the moving steel ball screw. This allows the position of the moving steel ball screw to be adjusted according to the shape of the blank according to the turning angle, avoiding frequent pressure plate replacement and reducing the ring forming time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model;

[0018] Figure 2 This is a side view of the structure of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the lathe fixture structure for a multi-directional self-locking fixture for machining automotive steering knuckles, as proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the mounting base of a multi-directional self-locking clamp for machining automotive steering knuckles, as proposed in this utility model.

[0021] Figure 5 This is a schematic diagram of the mounting base of a multi-directional self-locking clamp for machining automotive steering knuckles, as proposed in this utility model.

[0022] Figure 6 This is a schematic diagram of the three-structure mounting base of a multi-directional self-locking clamp for machining automotive steering knuckles proposed in this utility model;

[0023] Figure 7 This is a schematic cross-sectional view of the floating ball pin seat of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model.

[0024] Figure 8 This is a schematic diagram of the floating ball pin structure of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model;

[0025] Figure 9 This is a schematic cross-sectional view of the dust cover structure of a multi-directional self-locking clamp for machining automotive steering knuckles proposed in this utility model.

[0026] Figure 10 This is a schematic diagram of the contour block seat structure of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model;

[0027] Figure 11 This is a schematic diagram of the oil passage and oil passage block structure of a multi-directional self-locking fixture for machining automotive steering knuckles proposed in this utility model.

[0028] In the diagram: 100, base plate of the fixture body; 101, transition plate; 102, angular pin; 200, lathe fixture body; 201, rough guide block; 202, contour block seat; 203, contour positioning block; 204, adjusting rod seat; 205, adjusting screw; 206, positioning screw; 207, cover plate; 208, counterweight one; 209, counterweight two; 210, mounting hole; 211, mounting screw; 300, mounting seat one; 301, mounting seat two; 302, mounting seat three; 30 3. Lever cylinder; 304. Pressure plate; 305. Connecting rod; 306. Pressure plate base; 307. Limiting screw; 308. Oil circuit board through; 309. Oil circuit board plug; 310. Moving ball screw; 400. Floating ball pin seat one; 401. Floating ball pin seat two; 402. Floating ball pin one; 403. Floating ball pin two; 404. Limiting screw; 405. Limiting groove one; 406. Limiting groove two; 407. Spring; 408. Dust cover; 409. Limiting hole; 410. Screw hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-11 This utility model provides a technical solution: a multi-directional self-locking fixture for machining automotive steering knuckles, including a fixture base plate 100 and an intermediate plate 101. An angular pin 102 is installed on the intermediate plate 101 and is movably installed inside the fixture base plate 100. A lathe fixture 200 is detachably installed above the fixture base plate 100. A positioning structure is connected to the lathe fixture 200. Two sets of clamping structures and two sets of adapting structures are connected above the lathe fixture 200. Several counterweights 1 208 and several counterweights 209 are detachably installed on the fixture base plate 100.

[0031] Furthermore, the positioning structure includes several coarse guide blocks 201, which are detachably mounted on the upper part of the lathe fixture 200. A contour block seat 202 is mounted on the upper part of the lathe fixture 200, and a contour positioning block 203 is detachably mounted on the contour block seat 202. The contour positioning block 203 and the contour block seat 202 can be fixed with bolts, so that the contour positioning block 203 can be removed from the contour block seat 202. The contour positioning block 203 can be replaced to match the shape of the hole on the car steering knuckle. The car steering knuckle is first fitted onto the contour positioning block 203.

[0032] Furthermore, the coarse guide block 201 has an internal mounting hole 210, and a mounting screw 211 is movably mounted on the coarse guide block 201. One end of the mounting screw 211 passes through the mounting hole 210 and is threaded into the lathe fixture 200. By rotating the mounting screw 211 and unscrewing it from the lathe fixture 200, the position restriction on the coarse guide block 201 can be released. At this time, the position of the coarse guide block 201 can be adjusted so that the spacing between adjacent coarse guide blocks 201 matches the size of the automobile steering knuckle, so that the end of the automobile steering knuckle can be located between the corresponding two coarse guide blocks 201.

[0033] Furthermore, the positioning structure also includes several adjusting rod seats 204. Adjusting screws 205 are threaded onto the internal threads of each adjusting rod seat 204. One end of the adjusting screw 205 contacts the surface of the lathe fixture 200. A positioning screw 206 is movably installed inside the adjusting rod seat 204. One end of the positioning screw 206 passes through the adjusting rod seat 204 and is threaded onto the interior of the fixture base plate 100. A cover plate 207 is detachably installed inside the lathe fixture 200. The adjusting rod seats 204 are fixed to the fixture base plate 100 by the positioning screws 206. Rotating the adjusting screws 205 allows them to move within the adjusting rod seat 204. The moving adjusting screw 205 will abut against one side of the lathe fixture 200. By rotating and adjusting the movement distance of the adjusting screws 205, the positioning effect of the lathe fixture 200 can be achieved.

[0034] Furthermore, the clamping structure includes mounting base one 300, mounting base two 301, and mounting base three 302. Mounting base one 300, mounting base two 301, and mounting base three 302 can all be detachably mounted on top of the lathe fixture 200. Each mounting base one 300, mounting base two 301, and mounting base three 302 has a lever cylinder 303 installed inside. Each of the three lever cylinders 303 has a pressure plate 304 rotatably mounted on its output end. Each of the three pressure plates 304 has a moving ball screw 310 mounted on it. Each of the three pressure plates 304 has a connecting rod 305 rotatably mounted on one side. Each of the three connecting rods 305 has a pressure plate base 306 rotatably mounted on one end. The three pressure plate bases 306 are respectively rotatably mounted on the lathe fixture 200. On mounting base 1 300, mounting base 2 301, and mounting base 302, the lever cylinder 303 inside the mounting base 1 300, mounting base 2 301, and mounting base 302 are simultaneously activated, causing the output end of the lever cylinder 303 to drive the corresponding pressure plate 304 to flip on the connecting rod 305, so that the pressure plate 304 can drive the moving steel ball screw 310 to press on the surface of the automobile steering knuckle. Mounting base 1 300, mounting base 2 301, and mounting base 302 are all designed to be detachable and can be fixed to the lathe fixture 200 with bolts, so that mounting base 1 300, mounting base 2 301, and mounting base 302 of different heights can be replaced according to the different sizes of automobile steering knuckles.

[0035] Furthermore, each of the three pressure plate bases 306 has a limit screw 307 threadedly installed inside. The three limit screws 307 are in contact with the corresponding mounting base 1 300, mounting base 2 301 and mounting base 302 respectively. By rotating the pressure plate base 306, it can rotate around the telescopic end of the lever cylinder 303. While the pressure plate base 306 is rotating, it can drive the corresponding pressure plate 304, connecting rod 305 and telescopic end of lever cylinder 303 to rotate, so as to change the direction of pressure plate 304. By rotating the limit screw 307, it can move through the threaded engagement with the pressure plate base 306, so that the limit screw 307 can press on the corresponding mounting base to limit the angle of the pressure plate base 306.

[0036] Furthermore, one side of each of the two mounting bases 302 is detachably equipped with an oil circuit board 308 and an oil circuit board plug 309. The oil circuit board 308 allows hydraulic oil to flow along the designed path, driving the lever cylinder 303 inside the mounting base 302 to complete clamping, releasing and other actions. The oil circuit board plug 309 is used to seal the oil port.

[0037] Furthermore, the adaptive structure includes three floating ball pin seats 400 and three floating ball pin seats 401. The three floating ball pin seats 400 are respectively mounted on mounting base 300, mounting base 301, and mounting base 302. The floating ball pin seat 401 is mounted on the base plate 100 of the clamping body. Floating ball pins 402 are slidably installed inside each of the three floating ball pin seats 400. Floating ball pins 403 are slidably installed inside the floating ball pin seat 401. Limiting screws 404 are threadedly installed inside both the three floating ball pin seats 400 and the floating ball pin seat 401. Limiting grooves 405 are formed inside each of the three floating ball pins 402. Limiting grooves 406 are formed inside each of the three floating ball pins 403. The four limiting screws 404 are slidably installed in their respective limiting grooves. Within the first 405 and the second 406, springs 407 are installed inside the three floating ball pins 402 and 403. One end of each of the four springs 407 is installed on the base plate 100, mounting seat 300, mounting seat 301, and mounting seat 302, respectively. When the steering knuckle is compressed, its bottom will cause the corresponding floating ball pins 402 and 403 to move downward. When the floating ball pins 402 and 403 descend, they will slide on the corresponding limiting screws 404 through the first 405 and the second 406. At the same time, the descending floating ball pins 402 and 403 will compress the corresponding springs 407, so that the floating ball pins 402 and 403 can adapt to the undulations of the steering knuckle surface.

[0038] Furthermore, both the first floating ball pin seat 400 and the second floating ball pin seat 401 are detachably equipped with dust covers 408. Both dust covers 408 have screw holes 410 inside. The first floating ball pin seat 400 and the second floating ball pin seat 401 have limiting holes 409 inside. The limiting holes 409 on the same side are connected to the screw holes 410. When installing the dust cover 408, it can be placed on the corresponding first floating ball pin seat 400 or second floating ball pin seat 401. At the same time, the screw holes 410 on the dust cover 408 are aligned with the limiting holes 409. Then, the bolts are screwed into the screw holes 410 and passed through the limiting holes 409 to fix the position of the dust cover 408.

[0039] The working principle is as follows: During installation, the transition plate 101 can be installed on the lathe spindle first. Align the slot on the fixture base plate 100 with the angular pin 102, place the fixture base plate 100 on the transition plate 101 and fix it with bolts. When installing the lathe fixture 200, it can be placed on the fixture base plate 100. Then, the adjusting rod seat 204 is fixed to the fixture base plate 100 by the positioning screw 206. Rotating the adjusting screw 205 allows it to move within the adjusting rod seat 204. The moving adjusting screw 205 will abut against one side of the lathe fixture 200. By rotating and adjusting the moving distance of the adjusting screw 205, the positioning effect of the lathe fixture 200 can be achieved. After adjustment, the cover plate 207 is placed on the lathe fixture 200. On the 0, by using bolts to pass through the cover plate 207 and the lathe fixture 200 and screw them into the fixture base plate 100, the installation of the lathe fixture 200 can be completed. The contour positioning block 203 and the contour block seat 202 can be fixed with bolts, so that the contour positioning block 203 can be removed from the contour block seat 202. By replacing the contour positioning block 203, it can be adapted to the shape of the hole on the car steering knuckle. First, the car steering knuckle is put on the contour positioning block 203. At the same time, the various parts of the car steering knuckle will be placed on the corresponding floating ball pin 1 402 and floating ball pin 2 403 respectively. By rotating the installation screw 211 and unscrewing it from the lathe fixture 200, the position restriction on the coarse guide block 201 can be released. At this time, the coarse guide block 201 can be adjusted. The position of the guide block 201 is adjusted so that the spacing between adjacent coarse guide blocks 201 matches the size of the car steering knuckle, allowing the end of the car steering knuckle to be positioned between the corresponding two coarse guide blocks 201. The coarse guide blocks 201 restrict the position of the car steering knuckle, achieving initial positioning. Then, the lever cylinders 303 inside mounting base one 300, mounting base two 301, and mounting base three 302 are simultaneously activated. This causes the output end of the lever cylinder 303 to drive the corresponding pressure plate 304 to rotate on the connecting rod 305. Simultaneously, the connecting rod 305 rotates on the pressure plate base 306 to adapt to the angle change of the pressure plate 304, allowing the pressure plate 304 to drive the moving steel ball screw 310 to press against the surface of the car steering knuckle. Due to the mounting base one 300, the guide block 201, the guide block 202, and the mounting base three 302, the position of the car steering knuckle is adjusted. The different heights of mounting base 2 301 and mounting base 302 result in different heights for the multiple pressure plates 304 and the moving ball screw 310. Mounting base 1 300, mounting base 2 301, and mounting base 302 are all detachable and can be bolted to the lathe fixture 200. This allows for the replacement of mounting bases 1 300, 2 301, and 302 of different heights to suit different automotive steering knuckle sizes. When the automotive steering knuckle is under pressure, its bottom will cause the corresponding floating ball pins 1 402 and 2 403 to descend. As they descend, floating ball pins 1 402 and 2 403 slide on the corresponding limiting screw 404 through limiting grooves 1 405 and 2 406.Simultaneously descending floating ball pins 402 and 403 compress the corresponding springs 407, allowing them to adapt to the undulations of the steering knuckle surface.

[0040] Automotive steering knuckles are typically designed to be symmetrical, but the actual structure can vary slightly depending on the installation direction. (See reference...) Figure 1 When machining the left part, the left counterweight 208 can be installed and the right counterweight 208 can be removed. Simultaneously, an oil passage 308 is installed on the left mounting base 302, and an oil passage plug 309 is installed on the right mounting base 302. Dust covers can be added to the right floating ball pins 402 and 403. Conversely, when machining the right part, the right counterweight 208 can be installed and the left counterweight 208 can be removed. Then, an oil passage 308 is installed on the right mounting base 302, and an oil passage plug 309 is installed on the left mounting base 302. The left floating ball pin 402... A dust cover is installed on the floating ball pin 403 to facilitate alignment during fixture use. When installing the dust cover 408, it can be placed on the corresponding floating ball pin seat 400 or floating ball pin seat 401, so that the dust cover 408 covers the floating ball pin 402 or floating ball pin 403. At the same time, the screw hole 410 on the dust cover 408 is aligned with the limiting hole 409. Then, the bolt is screwed into the screw hole 410 and passed through the limiting hole 409 to fix the position of the dust cover 408, thus covering the top of the corresponding floating ball pin seat 400 and floating ball pin seat 401.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. The circuits, electronic components and modules involved in the present invention are all prior art and can be fully implemented by those skilled in the art, so there is no need to elaborate. The content protected by the present invention does not involve improvements to software and methods.

Claims

1. A multi-directional self-locking fixture for machining automotive steering knuckles, comprising a fixture base plate (100) and an intermediate plate (101), wherein an angular pin (102) is mounted on the intermediate plate (101), and the angular pin (102) is movably mounted inside the fixture base plate (100); characterized in that: A lathe fixture (200) is detachably installed on the top of the fixture base plate (100). A positioning structure is connected to the lathe fixture (200). Two sets of clamping structures and two sets of adapting structures are connected to the top of the lathe fixture (200). Several counterweights (208) and several counterweights (209) are detachably installed on the fixture base plate (100).

2. The multi-directional self-locking fixture for machining automotive steering knuckles according to claim 1, characterized in that: The positioning structure includes several coarse guide blocks (201), which are detachably installed above the lathe fixture (200). A contour block seat (202) is installed above the lathe fixture (200), and a contour positioning block (203) is detachably installed on the contour block seat (202).

3. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 2, characterized in that: The coarse guide block (201) has an installation hole (210) inside. An installation screw (211) is movably installed on the coarse guide block (201). One end of the installation screw (211) passes through the installation hole (210) and is threaded into the lathe fixture (200).

4. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 1, characterized in that: The positioning structure also includes several adjusting rod seats (204). Adjusting screws (205) are installed inside the adjusting rod seats (204). One end of the adjusting screws (205) is in contact with the surface of the lathe fixture body (200). A positioning screw (206) is movably installed inside the adjusting rod seats (204). One end of the positioning screw (206) passes through the adjusting rod seats (204) and is threaded inside the fixture body base plate (100). A cover plate (207) is detachably installed inside the lathe fixture body (200).

5. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 1, characterized in that: The clamping structure includes mounting base one (300), mounting base two (301) and mounting base three (302). Mounting base one (300), mounting base two (301) and mounting base three (302) can all be detachably mounted on the lathe fixture body (200). A lever cylinder (303) is installed inside each of mounting base one (300), mounting base two (301) and mounting base three (302). A pressure plate (304) is rotatably mounted on the output end of each of the three lever cylinders (303). A moving steel ball screw (310) is installed on each of the three pressure plates (304). A connecting rod (305) is rotatably mounted on one side of each of the three pressure plates (304). A pressure plate base (306) is rotatably mounted on one end of each of the three connecting rods (305). The three pressure plate bases (306) are rotatably mounted on mounting base one (300), mounting base two (301) and mounting base three (302) respectively.

6. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 5, characterized in that: The three pressure plate bases (306) are all threaded with limit screws (307), and the three limit screws (307) are in contact with the corresponding mounting base one (300), mounting base two (301) and mounting base three (302) respectively.

7. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 6, characterized in that: One side of each of the two mounting bases (302) is detachably fitted with an oil circuit board (308) and an oil circuit board plug (309).

8. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 1, characterized in that: The adaptive structure includes three floating ball pin seats 1 (400) and three floating ball pin seats 2 (401). The three floating ball pin seats 1 (400) are respectively mounted on mounting base 1 (300), mounting base 2 (301) and mounting base 3 (302). The floating ball pin seat 2 (401) is mounted on the base plate (100) of the clamping body. Floating ball pin 1 (402) is slidably installed inside each of the three floating ball pin seats 1 (400). Floating ball pin 2 (403) is slidably installed inside the floating ball pin seat 2 (401). The interiors of the three floating ball pin seats 1 (400) and the floating ball pin seat 2 (401) are threaded. There is a limiting screw (404), and the three floating ball pins one (402) are all provided with limiting groove one (405), and the floating ball pin two (403) is provided with limiting groove two (406). The four limiting screws (404) are slidably installed in the corresponding limiting groove one (405) and limiting groove two (406). The three floating ball pins one (402) and floating ball pin two (403) are all provided with springs (407). One end of the four springs (407) is installed on the clamp body base plate (100), mounting seat one (300), mounting seat two (301) and mounting seat three (302) respectively.

9. A multi-directional self-locking fixture for machining automotive steering knuckles according to claim 8, characterized in that: Dust covers (408) can be detachably installed on both the first floating ball pin seat (400) and the second floating ball pin seat (401). Both dust covers (408) have screw holes (410) inside. Limiting holes (409) are opened inside the first floating ball pin seat (400) and the second floating ball pin seat (401). The limiting holes (409) on the same side are connected to the screw holes (410).

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