A steering knuckle unit positioning and installation fixture

Abstract

This utility model relates to the technical field of automotive parts production equipment, specifically to a steering knuckle unit positioning and installation fixture, comprising: a platform, a positioning clamp mounted on the platform, and a pressing assembly mounted on the platform; the positioning clamp includes a mounting plate, a positioning bracket mounted on the mounting plate, a positioning sleeve for positioning the center hole of the steering knuckle on the positioning bracket, an outer sliding rod at the center of the positioning bracket, an inner sliding rod sliding inside the outer sliding rod, a driving assembly at the bottom of the outer and inner sliding rods, a top block acting on the bottom of the bearing at the top of the outer sliding rod, and a positioning head for positioning the inner hole of the bearing at the top of the inner sliding rod; the mounting plate also includes a positioning support for positioning the steering knuckle arm; the pressing assembly includes a pressing head, which, after descending, can press into the center hole of the wheel hub for positioning. This utility model positions the steering knuckle, dust disc, bearing, brake pad, and wheel hub from multiple dimensions, improving the installation accuracy of the steering knuckle unit.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts production equipment, and specifically relates to a steering knuckle unit positioning and installation fixture. Background Technology

[0002] In automobile chassis assembly, the positioning and assembly of steering knuckles, wheel hubs, brake pads, bearings, and dust discs are core aspects that ensure wheel rotation accuracy, driving safety, and component lifespan. The fit between these components is complex, involving multiple factors such as machining accuracy, tolerance control, process sequence, and assembly force control.

[0003] Positioning is fundamental to assembly; the positioning references of each component must be strictly unified, otherwise it will lead to axis misalignment, abnormal rotational noise, or premature wear after assembly. The difficulty in assembling steering knuckles, wheel hubs, bearings, and dust covers essentially lies in the contradiction between "precision matching" and "performance balance": ensuring the consistency of positioning references and the rationality of fit tolerances for each component, while controlling the accuracy of assembly forces and preload, and simultaneously ensuring the reliability of the dust seal. Therefore, a steering knuckle unit positioning and installation fixture is urgently needed to meet the above conditions for the assembly of steering knuckles, wheel hubs, bearings, and dust covers. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a steering knuckle unit positioning and installation fixture, which is reasonably designed, simple in structure, provides accurate positioning, and improves the overall installation accuracy.

[0005] Technical solution: In order to achieve the above objectives, this utility model provides a steering knuckle unit positioning and installation fixture for positioning and assembling steering knuckles, wheel hubs, brake pads, bearings, and dustproof discs, including: a platform, a positioning fixture on the platform, and a pressing assembly mounted on the platform. The positioning fixture includes a mounting plate, a positioning bracket mounted on the mounting plate, a positioning sleeve for positioning the center hole of the steering knuckle on the positioning bracket, an outer slide rod at the center of the positioning bracket, an inner slide rod slidably mounted inside the outer slide rod, a drive assembly at the bottom of the outer and inner slide rods, a top block acting on the bottom of the bearing at the top of the outer slide rod, and a positioning head for positioning the inner hole of the bearing at the top of the inner slide rod; the mounting plate also includes a positioning support for positioning the steering knuckle arm. The pressing assembly includes a pressing head, which, after descending, can press into the center hole of the wheel hub for positioning.

[0006] Furthermore, the mounting plate is also equipped with a set of dustproof tray detection devices. The dustproof tray detection devices include a mounting column on the mounting plate and a detection rod on the top of the mounting column. The mounting column is equipped with an inductive proximity sensor, which can detect the approach of the metal detection rod. The mounting plate is also equipped with a retractable dustproof tray positioning post for positioning the dustproof tray.

[0007] Furthermore, the mounting plate is provided with an anti-rotation device to prevent the wheel hub from rotating. The anti-rotation device includes a mounting rod on the mounting plate. The anti-rotation stop bar on the mounting rod can be rotated to cooperate with a pair of bolts on the wheel hub to achieve anti-rotation.

[0008] Furthermore, the drive assembly includes a lifting cylinder connected to the bottom of the inner slide rod, and an inclined block disposed at the bottom of the outer slide rod. The side of the inclined block is provided with a lateral movement cylinder that can drive the inclined block to move laterally. The bottom of the outer slide rod is provided with a floating block, and the bottom of the floating block is provided with an inclined surface that cooperates with the inclined block.

[0009] Furthermore, the pressing assembly also includes a gantry bracket mounted on the platform. The upper part of the gantry bracket is provided with a pressing cylinder, and the lower part is provided with a pressing head mounting bracket on which a pressing head is installed. The pressing head mounting bracket is connected to the pressing cylinder. The lower pressure head mounting bracket is equipped with a drive cylinder, which is connected to the lower pressure head.

[0010] Furthermore, the gantry bracket is provided with a set of guide rods connected to the lower pressure head mounting bracket, the lower pressure head mounting bracket is provided with a pull rod type displacement sensor, the piston rod of the drive cylinder is provided with a detection plate, and the pull rod type displacement sensor is connected to the detection plate.

[0011] Furthermore, the platform is provided with a set of linear guide rails, the mounting plate is mounted on the linear guide rails by a slider, and the platform is also provided with a pushing cylinder, which is connected to the mounting plate.

[0012] Furthermore, the positioning support is provided with a groove for engaging with the steering knuckle arm. As can be seen from the above technical solution, this utility model has the following beneficial effects compared with the prior art: This utility model discloses a steering knuckle unit positioning and installation fixture. The steering knuckle is positioned by a positioning sleeve on a positioning bracket, and the wheel hub is positioned by an inner sliding rod coaxially arranged with the positioning sleeve. To maintain coaxiality, a lower pressure head is used to position and press the upper part of the wheel hub. A dust cover detection device is also included to detect the placement accuracy of the dust cover, which is positioned by a dust cover positioning post. Furthermore, an anti-rotation device is installed on the mounting plate to prevent the wheel hub from rotating during installation, thus avoiding misalignment between the hub and the dust cover components. This utility model positions the steering knuckle, dust cover, bearing, brake pads, and wheel hub from multiple dimensions, improving the installation accuracy of the steering knuckle unit. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of a steering knuckle unit positioning and installation fixture according to the present invention; Figure 2 This is a top view of a steering knuckle unit positioning and installation fixture according to the present invention; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 2 BB section view; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the positioning fixture described in this utility model; Figure 8 This is a rear view of the positioning fixture described in this utility model.

[0014] In the diagram: 1-platform, 11-linear guide rail, 12-pushing cylinder; 21-Mounting plate, 211-Mounting column, 212-Detection rod, 213-Dustproof disc positioning column, 214-Mounting rod, 215-Anti-rotation stop bar, 22-Positioning bracket, 23-Positioning sleeve, 24-Outer slide bar, 241-Top block, 25-Inner slide bar, 251-Positioning head, 26-Drive assembly, 261-Lifting cylinder, 262-Angled insert block, 263-Transverse cylinder, 264-Floating block, 27-Positioning support column; 31-Pressing head, 32-Gantry bracket, 321-Pressing cylinder, 322-Pressing head mounting bracket, 323-Drive cylinder, 324-Guide rod, 325-Tie rod type displacement sensor, 326-Detection board; 4-Steering knuckle, 5-Dust disc, 6-Brake pad, 7-Wheel hub, 8-Bearing. Detailed Implementation

[0015] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0016] like Figures 1-8 As shown, a steering knuckle unit positioning and installation fixture is used for positioning and assembling steering knuckles, wheel hubs, brake pads, bearings, and dust discs. It includes: a platform 1, a positioning fixture disposed on the platform 1, and a pressing assembly mounted on the platform 1. The positioning fixture includes a mounting plate 21, a positioning bracket 22 mounted on the mounting plate 21, a positioning sleeve 23 for positioning the center hole of the steering knuckle on the positioning bracket 22, an outer slide rod 24 at the center of the positioning bracket 22, an inner slide rod 25 slidably mounted inside the outer slide rod 24, a drive assembly 26 at the bottom of the outer slide rod 24 and the inner slide rod 25, a top block 241 acting on the bottom of the bearing at the top of the outer slide rod 24, and a positioning head 251 for positioning the inner hole of the bearing at the top of the inner slide rod 25; the mounting plate 21 also includes a positioning support 27 for positioning the steering knuckle arm. The pressing assembly includes a pressing head 31, which, after descending, can press into the center hole of the wheel hub for positioning.

[0017] Before assembly, align the center hole of the steering knuckle 4 with the positioning sleeve 23, and position the steering knuckle 4 support arm through the positioning support 27. Place the bearing 8 into the center hole of the steering knuckle 4, then place the dust cover 5 on top, and place the wheel hub 7 into the bearing 8. Drive assembly 26 drives the inner slide rod 25 to rise. The bottom of the wheel hub 7 is positioned by the positioning head 251, and the upper part is positioned and pressed by the lower pressure head 31. Finally, install the brake pad 6 onto the wheel hub 7. After assembly, drive assembly 26 drives the outer slide rod 24 to rise, which in turn drives the top block 241 to loosen the entire steering knuckle unit for easy removal.

[0018] The mounting plate 21 is also equipped with a set of dustproof tray detection devices. The dustproof tray detection devices include a mounting post 211 on the mounting plate 21 and a detection rod 212 on the top of the mounting post 211. The mounting post 211 is equipped with an inductive proximity sensor, which can detect the approach of the metal detection rod 212. The mounting plate 21 is also provided with a retractable dustproof tray positioning post 213 for positioning the dustproof tray.

[0019] With the above scheme, when the dustproof tray 5 is placed, it will press down the detection rod 212. The inductive proximity sensor on the mounting post 211 can detect the distance between the gold detection rod 212 and the sensor, thereby helping to determine whether the dustproof tray 5 is placed horizontally and in place. After the dustproof tray 5 is placed, it is positioned by the retractable positioning post 213 corresponding to its positioning hole.

[0020] Specifically, the mounting plate 21 is provided with an anti-rotation device to prevent the wheel hub from rotating. The anti-rotation device includes a mounting rod 214 on the mounting plate 21 and an anti-rotation stop bar 215 on the mounting rod 214. The anti-rotation stop bar 215 can cooperate with a pair of bolts on the wheel hub to achieve anti-rotation.

[0021] By adopting the above solution, since the hub 7 must not rotate during installation to avoid misalignment, the anti-rotation lever 213 is secured to a pair of bolts on the hub 7 to prevent it from rotating, thereby further improving the installation accuracy.

[0022] Specifically, the drive assembly 26 includes a lifting cylinder 261 connected to the bottom of the inner slide rod 25, and an inclined block 262 disposed at the bottom of the outer slide rod 24. The side of the inclined block 262 is provided with a lateral cylinder 263 that can drive the inclined block 262 to move laterally. The bottom of the outer slide rod 24 is provided with a floating block 264, and the bottom of the floating block 264 is provided with an inclined surface that cooperates with the inclined block 262.

[0023] Preferably, the pressing assembly further includes a gantry bracket 32 ​​mounted on the platform 1. The upper part of the gantry bracket 32 ​​is provided with a pressing cylinder 321, and the lower part is provided with a pressing head mounting bracket 322 on which a pressing head 31 is mounted. The pressing head mounting bracket 322 is connected to the pressing cylinder 321. The pressure head mounting bracket 322 is equipped with a drive cylinder 323, which is connected to the pressure head 31.

[0024] Through the above technical solution, the pressing cylinder 321 drives the entire pressing head mounting bracket 322 to move down. After it is in place, the driving cylinder 321 drives the pressing head 31 to move down and press it into the center hole on the upper part of the hub 7.

[0025] In a further optimization scheme, the gantry bracket 32 ​​is provided with a set of guide rods 324 connected to the lower pressure head mounting bracket 322, the lower pressure head mounting bracket 322 is provided with a pull rod type displacement sensor 325, the piston rod of the drive cylinder 321 is provided with a detection plate 326, and the pull rod type displacement sensor 325 is connected to the detection plate 326.

[0026] Through the above technical solution, the guide rod 324 can ensure the accuracy of the downward movement of the pressure head mounting bracket 322, and ensure that the pressure head 31 can be precisely connected with the hub 7 after it moves down. At the same time, the working stroke of the drive cylinder 321 can be measured by the pull rod displacement sensor 325, and the downward stroke of the pressure head 31 can be precisely controlled.

[0027] Specifically, the platform 1 is provided with a set of linear guide rails 11, the mounting plate 21 is mounted on the linear guide rails 11 by a slider, and the platform 1 is also provided with a push cylinder 12, which is connected to the mounting plate 21.

[0028] Through the above technical solution, the push cylinder 12 can drive the mounting plate 21 to slide on the platform 1, making it convenient for workers to place the parts on the positioning fixture. After placement, the push cylinder 12 drives the mounting plate 21 to move directly below the pressing assembly. In this solution, a set of proximity switches is provided at the rear of the mounting plate 21 to precisely control the stopping position of the mounting plate 21.

[0029] Specifically, the positioning support 27 is provided with a groove for engaging with the steering knuckle arm. The steering knuckle 4 arm engages with the positioning support 27 to assist in the positioning of the steering knuckle 4.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A steering knuckle unit positioning and installation fixture, used for positioning and assembling steering knuckles, wheel hubs, brake pads, bearings, and dust discs, characterized in that, include: Platform (1), positioning fixtures provided on platform (1), and pressing assembly mounted on platform (1); The positioning fixture includes a mounting plate (21), a positioning bracket (22) on the mounting plate (21), a positioning sleeve (23) for positioning the center hole of the steering knuckle on the positioning bracket (22), an outer slide rod (24) at the center of the positioning bracket (22), an inner slide rod (25) sliding inside the outer slide rod (24), a drive assembly (26) at the bottom of the outer slide rod (24) and the inner slide rod (25), a top block (241) acting on the bottom of the bearing on the top of the outer slide rod (24), and a positioning head (251) for positioning the inner hole of the bearing on the top of the inner slide rod (25); the mounting plate (21) also has a positioning support (27) for positioning the steering knuckle arm. The pressing assembly includes a pressing head (31), which can be pressed into the center hole of the hub for positioning after it descends.

2. The steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The mounting plate (21) is also provided with a set of dustproof tray detection devices. The dustproof tray detection devices include a mounting column (211) on the mounting plate (21) and a detection rod (212) on the top of the mounting column (211) by rotation. The mounting column (211) is provided with an inductive proximity sensor, which can detect the approach of the metal detection rod (212). The mounting plate (21) is also provided with a retractable dustproof tray positioning post (213) for positioning the dustproof tray.

3. The steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The mounting plate (21) is provided with an anti-rotation device to prevent the hub from rotating. The anti-rotation device includes a mounting rod (214) on the mounting plate (21) and an anti-rotation stop bar (215) on the mounting rod (214) can be rotated. The anti-rotation stop bar (215) can cooperate with a pair of bolts on the hub to achieve anti-rotation.

4. The steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The drive assembly (26) includes a lifting cylinder (261) connected to the bottom of the inner slide rod (25), and also includes an inclined block (262) located at the bottom of the outer slide rod (24). The side of the inclined block (262) is provided with a transverse cylinder (263) that can drive the inclined block (262) to move laterally. The bottom of the outer slide rod (24) is provided with a floating block (264), and the bottom of the floating block (264) is provided with an inclined surface that cooperates with the inclined block (262).

5. A steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The pressing assembly also includes a gantry bracket (32) mounted on the platform (1). The upper part of the gantry bracket (32) is provided with a pressing cylinder (321), and the lower part is provided with a pressing head mounting bracket (322) on which a pressing head (31) is mounted. The pressing head mounting bracket (322) is connected to the pressing cylinder (321). The lower pressure head mounting bracket (322) is equipped with a drive cylinder (323), which is connected to the lower pressure head (31).

6. A steering knuckle unit positioning and installation fixture according to claim 5, characterized in that, The gantry bracket (32) is provided with a set of guide rods (324) connected to the lower pressure head mounting bracket (322). The lower pressure head mounting bracket (322) is provided with a pull rod type displacement sensor (325). The piston rod of the drive cylinder (323) is provided with a detection plate (326). The pull rod type displacement sensor (325) is connected to the detection plate (326).

7. A steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The platform (1) is provided with a set of linear guide rails (11), and the mounting plate (21) is mounted on the linear guide rails (11) by a slider. The platform (1) is also provided with a push cylinder (12), which is connected to the mounting plate (21).

8. A steering knuckle unit positioning and installation fixture according to claim 1, characterized in that, The positioning support (27) is provided with a groove for engaging with the steering knuckle arm.

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