Positioning fixture for verifying performance of a knuckle

Abstract

The utility model provides a kind of positioning fixture of knuckle performance verification, including base, top plate, connecting disc and hinged component.Base is rigidly connected with external test bench, top plate is connected with base by hinged component, connecting disc is divided into coaxial first connecting part and second connecting part, respectively for fixed workpiece and with top plate connection.Hinged component is composed of upper hinged block, lower hinged block, screw and fastening nut, flexible rotation and fixed of top plate can be realized by adjusting fastening nut.The design realizes the multi-angle adjustment and stable fixation of knuckle workpiece in the testing process by the synergistic effect of hinged component and connecting disc, significantly improves the testing efficiency and accuracy.The fixture simple structure, convenient operation is suitable for the performance verification of multiple knuckle models, significantly reduces testing cost and time.

Description

Technical Field

[0001] This utility model relates to a test fixture, specifically a positioning fixture for verifying the performance of a steering knuckle. Background Technology

[0002] Steering knuckles are common automotive components, and verifying their mechanical performance requires the use of specialized fixtures to hold the workpiece. A typical verification process involves configuring an actuator, installing a testing rod between the actuator and the test holes on the workpiece, activating the actuator, and testing the workpiece's performance. It is evident that the workpiece's testing position must be strictly limited; changing the actuator's testing direction can easily lead to data deviations or equipment damage. The unique characteristic of steering knuckles lies in the multiple test holes on their surface, with inconsistent force directions at each hole. Furthermore, the hole dimensions vary depending on the workpiece model and manufacturing process, necessitating the use of different sized positioning fixtures. Therefore, a positioning fixture with strong compatibility is needed to meet the positioning requirements of workpieces of different sizes. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a positioning fixture for verifying the performance of a steering knuckle, including a base rigidly connected to an external test bench; a top plate connected to the base via a hinge assembly; and a connecting plate including a first connecting part and a second connecting part coaxially arranged, the first connecting part being located above the connecting plate and having a plurality of annularly distributed connecting holes for fixing the workpiece; the second connecting part being located below the connecting plate and fixedly connected to the top plate via the plurality of annularly distributed connecting holes; the hinge assembly includes: an upper hinge block for fixing and connecting the top plate, a lower hinge block for fixing and connecting the base, and a screw rod passing between the upper hinge block and the lower hinge block, one end of the screw rod being provided with a fastening nut.

[0004] Furthermore, the upper hinge block and the lower hinge block are triangular structures, and the hypotenuse of the triangular structure is fixedly connected to its corresponding top plate or base.

[0005] Furthermore, the upper hinge block consists of two sets, which are placed on both sides of the lower hinge block.

[0006] Furthermore, a support assembly is provided on the side of the top plate and base away from the hinge point. The support assembly includes two sets of connecting rods connecting the top plate and the base respectively, and a sliding rod disposed between the two sets of connecting rods. The sliding rod is provided with an axially extending central through hole. One end of the connecting rod is rotatably connected to the corresponding top plate or base, and the other end of the connecting rod is slidably connected to the central through hole of the sliding rod.

[0007] Furthermore, the top plate and the base are respectively provided with connecting ears on their sides, and the end of the connecting rod is connected to the connecting ears by threaded fasteners.

[0008] Furthermore, multiple sets of the connecting ears are arranged in parallel.

[0009] Furthermore, connecting plates are provided on the sides of the top plate and the base, and the two ends of the connecting plates are respectively connected to the sides of the top plate and the base by set screws.

[0010] This invention provides a positioning fixture for verifying the performance of a steering knuckle, comprising a base, a top plate, a connecting plate, and a hinge assembly. The base is rigidly connected to an external test bench, and the top plate is connected to the base via the hinge assembly. The connecting plate is divided into a first connecting part and a second connecting part, coaxially arranged, used for fixing the workpiece and connecting to the top plate, respectively. The hinge assembly consists of an upper hinge block, a lower hinge block, a screw, and a fastening nut. Adjusting the fastening nut allows for flexible rotation and fixation of the top plate. This design, through the synergistic action of the hinge assembly and the connecting plate, enables multi-angle adjustment and stable fixation of the steering knuckle workpiece during testing, significantly improving testing efficiency and accuracy. The fixture has a simple structure, is easy to operate, and is suitable for performance verification of various steering knuckle models, significantly reducing testing costs and time. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a positioning fixture for verifying the performance of a steering knuckle according to this utility model;

[0012] Figure 2 This is an exploded view of the positioning clamp of this utility model;

[0013] Figure 3 This is a connection diagram for verifying the performance of a steering knuckle using a positioning fixture.

[0014] Reference numerals: 1. Base; 2. Top plate; 3. Connecting plate; 3. First connecting part; 31. Second connecting part; 32. Hinge assembly; 4. Upper hinge block; 41. Lower hinge block; 42. Screw; 43. Fastening nut; 44. Support assembly; 5. Connecting rod; 51. Slide rod; 52. Connecting lug; 6. Connecting plate; 7. Actuator; 8. Test rod; 81. Adjusting block; 82. Bracket; 83. Detailed Implementation

[0015] like Figure 1 and Figure 2 The present invention provides a positioning fixture for verifying the performance of a steering knuckle, comprising a base 1, a top plate 2, and a connecting plate 3. The purpose of this invention is to provide a positioning fixture that can fix the steering knuckle workpiece onto the fixture.

[0016] The base 1 is a plate-shaped structure that is rigidly connected to the external test bench. The base 1 is hardened to ensure its resistance to deformation. Multiple U-shaped holes are opened on the surface of the base 1. Threaded connectors are inserted into the U-shaped holes to fix the base 1 to the test bench.

[0017] The connecting plate 3 has a disc-shaped structure, including a first connecting part 31 and a second connecting part 32 coaxially arranged. Both the first connecting part 31 and the second connecting part 32 have multiple connecting holes arranged in annular shape. The first connecting part 31 is located above the connecting plate 3 and serves as the workpiece mounting area, ensuring stable fixation of the workpiece. The second connecting part 32 is located below the connecting plate 3 and serves as the fixing area for the workpiece and the top plate 2. The connecting holes on the second connecting part 32 are evenly distributed, ensuring a stable connection between the connecting plate 3 and the top plate 2 after installation, fixing them as a whole. Simultaneously, the connecting holes on the second connecting part 32 correspond to those on the top plate 2, allowing the workpiece to be adjusted to any angle in the circumferential direction after it is placed on the connecting plate 3, controlling the workpiece's test hole position to be approximately level with the test position.

[0018] A hinge assembly 4 is provided between the top plate 2 and the base 1. The top plate 2 can rotate relative to the hinge point of the base 1 to adjust the position of the hole to be tested, so that the hole to be tested is in the optimal force application position. The hinge point is fastened by a threaded connector. After fixing, tightening the threaded fastener will fix the workpiece in the current position.

[0019] Specifically, the hinge assembly 4 includes an upper hinge block 41 fixedly connected to the top plate 2 and a lower hinge block 42 fixedly connected to the base 1. There are two sets of upper hinge blocks 41, which are placed on both sides of the lower hinge block 42. A screw 43 is provided along the hinge center of the upper hinge block 41 and the lower hinge block 42. The screw 43 passes through the upper hinge block 41 and the lower hinge block 42. A fastening nut 44 is provided on the other side of the screw 43. When the fastening nut 44 is opened, the upper hinge block 41 can rotate relative to the lower hinge block 42. When the fastening nut 44 is tightened, the position of the hinge assembly 4 no longer changes.

[0020] Furthermore, both the upper hinge block 41 and the lower hinge block 42 are triangular structures, with the hypotenuse of the triangular structure fixedly connected to the corresponding top plate 2 and base 1. The triangular structure forms a gradient force transmission structure, distributing the concentrated load at the hinge point to the hypotenuse, thus preventing instability in the connection between the top plate 2 and the base 1 due to excessive force during workpiece hole testing.

[0021] Furthermore, a support assembly 5 is provided on the side of the top plate 2 and the base 1 away from the hinge point. The support assembly 5 includes two sets of connecting rods 51 that connect the top plate 2 and the base 1 respectively, and a sliding rod 52 disposed between the two sets of connecting rods 51. The sliding rod 52 is provided with an axially extending central through hole. One end of the connecting rod 51 is rotatably connected to the corresponding top plate 2 or base 1, and the other end of the connecting rod 51 is slidably connected to the central through hole of the sliding rod 52. When the top plate 2 shifts relative to the base 1, the support assembly 5 can dynamically adjust the distance between them to avoid excessive displacement on the side away from the hinge assembly 4. Similarly, in this embodiment, multiple sets of connecting ears 6 are correspondingly provided on the sides of the top plate 2 and the base 1. The ends of the connecting rods 51 are connected to the connecting ears 6 by threaded fasteners. When the threaded fasteners are loosened, the connecting rods 51 can rotate along the connecting ears 6, and when the threaded fasteners are tightened, the positions of the top plate 2 and the base 1 are relatively fixed.

[0022] Furthermore, a connecting plate 7 is provided on the side of the top plate 2 and the base 1. The connecting plate 7 has connecting holes on both sides. The two ends of the connecting plate 7 are connected to the side of the top plate 2 and the base 1 respectively by set screws. The connecting plate 7 can also limit the position of the top plate 2 to avoid excessive swing amplitude of the top plate 2 when adjusting the hinge assembly 4.

[0023] like Figure 3 The diagram shows a test of a steering knuckle using the positioning fixture provided in this embodiment. The actuator 8 for testing is mounted on one side of the positioning fixture via a bracket 83. The output end of the actuator 8 is equipped with a test rod 81 and an adjusting block 82. First, the position of the actuator 8 on the bracket 83 is adjusted, and the steering knuckle is fixedly connected to the first connecting part 31. The connecting plate 3 is rotated to control the position of the hole to be tested to be approximately level with the position of the adjusting block 82, and the connecting plate 3 is fixed to the top plate 2. The fasteners on the adjusting block 82 are tightened, extending into the hole to be tested. The top plate 2 shifts relative to the base 1 until the force applied by the actuator 8 is fully converted into torque for the hole to be tested. Finally, the hinge assembly 4 is tightened, and the position of the positioning fixture no longer shifts, completing the position adjustment of the hole to be tested.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A positioning fixture for verifying the performance of a steering knuckle, characterized in that: Includes a base (1), which is rigidly connected to an external test bench; The top plate (2) is connected to the base (1) via a hinge assembly (4); The connecting plate (3) includes a first connecting part (31) and a second connecting part (32) arranged coaxially. The first connecting part (31) is located above the connecting plate (3) and has a plurality of connecting holes arranged in a ring for fixing the workpiece. The second connecting part (32) is located below the connecting plate (3) and is fixedly connected to the top plate (2) through a plurality of connecting holes arranged in a ring. The hinge assembly (4) includes: an upper hinge block (41) fixedly connected to the top plate (2), a lower hinge block (42) fixedly connected to the base (1), and a screw (43) passing between the upper hinge block (41) and the lower hinge block (42), with a fastening nut (44) provided at one end of the screw (43).

2. The positioning fixture for verifying steering knuckle performance as described in claim 1, characterized in that: The upper hinge block (41) and the lower hinge block (42) are triangular structures, and the hypotenuse of the triangular structure is fixedly connected to its corresponding top plate (2) or base (1).

3. The positioning fixture for verifying steering knuckle performance as described in claim 2, characterized in that: The upper hinge block (41) consists of two sets, which are placed on both sides of the lower hinge block (42).

4. The positioning fixture for verifying steering knuckle performance as described in claim 1, characterized in that: The top plate (2) and the base (1) are provided with a support assembly (5) on the side away from the hinge point. The support assembly (5) includes two sets of connecting rods (51) that connect the top plate (2) and the base (1) respectively, and a slide rod (52) provided between the two sets of connecting rods (51). The slide rod (52) is provided with an axially extending central through hole. One end of the connecting rod (51) is rotatably connected to the corresponding top plate (2) or base (1), and the other end of the connecting rod (51) is slidably connected to the central through hole of the slide rod (52).

5. A positioning fixture for verifying steering knuckle performance as described in claim 4, characterized in that: The top plate (2) and the base (1) are respectively provided with connecting ears (6) on their sides, and the end of the connecting rod (51) is connected to the connecting ears (6) by threaded fasteners.

6. The positioning fixture for verifying steering knuckle performance as described in claim 5, characterized in that: The connecting ear (6) is arranged in multiple sets in parallel.

7. The positioning fixture for verifying steering knuckle performance as described in claim 1, characterized in that: The top plate (2) and the base (1) are provided with connecting plates (7) on their sides. The two ends of the connecting plates (7) are connected to the sides of the top plate (2) and the base (1) respectively by set screws.

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