Chassis subframe mounting hole precision positioning plate

Abstract

The utility model discloses a chassis auxiliary frame mounting hole position precision positioning board belongs to the automobile manufacturing technical field, and positioning board includes left positioning board and right positioning board through the realization of sliding fit of sliding plate and guide plate groove to adjust length, and is equipped with positioning datum hole on two boards, and the top fixedly connected with the conical guide sleeve for quick guide, and the bottom fixedly connected with the positioning block for accurate clamping auxiliary frame, and positioning board still integrated for the spring hook of temporary fixed, for the telescopic spring of automatic reset and for the elastic sleeve of eliminating clearance. The utility model solves the poor commonality of existing positioning frock, the problem that is difficult to align and is not accurate, improves commonality through the structure of adjustable length, realizes quick alignment and accurate positioning through the combination of multifunctional positioning mechanism, and the installation efficiency, precision and operation convenience are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a precision positioning plate for chassis subframe mounting holes. Background Technology

[0002] In the modern automobile manufacturing process, the chassis subframe is an important assembly that supports and connects the engine, key components of the suspension system, and the body. Its installation accuracy is directly related to the vehicle's handling stability, driving safety, and the durability of its parts. Ensuring that the mounting holes on the subframe are precisely aligned with the preset holes on the chassis is a process requirement in the chassis assembly stage.

[0003] In actual assembly operations, because the subframe itself is quite heavy and bulky, relying entirely on manual lifting and visual alignment is not only labor-intensive, but also extremely difficult to guarantee the accuracy and consistency of installation, and the efficiency is relatively low. The industry usually uses some auxiliary positioning tools or fixtures to assist the installation process.

[0004] Currently, most positioning fixtures are designed for specific car models, with fixed structural dimensions and positioning reference points. While this design can guarantee the assembly accuracy of a single car model to a certain extent, it exposes obvious limitations. With the diversification of automotive market demands, flexible production lines need to be compatible with multiple different car models. The subframe dimensions and mounting hole spacing of these models often differ, requiring the production line to equip each model with a dedicated positioning fixture. This not only significantly increases the manufacturing cost and warehousing management burden of the fixtures, but also seriously affects the continuity and overall efficiency of the production line when switching production models due to frequent fixture changes.

[0005] Therefore, this utility model proposes a precise positioning plate for the mounting holes of the chassis subframe to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the chassis subframe mounting hole precision positioning plate, such as fixed structural dimensions, inability to adjust to hole spacing of different vehicle models, poor versatility, and lack of efficient guidance and temporary fixing structure leading to difficulty in hole alignment and low positioning accuracy, this utility model aims to provide a chassis subframe mounting hole precision positioning plate with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a chassis subframe mounting hole precision positioning plate, including: a left positioning plate and a right positioning plate that are slidably fitted together; a sliding plate is fixedly connected to the outer wall of the left positioning plate; a guide plate groove for the sliding plate to slide in the length direction is opened on the outer wall of the right positioning plate; positioning reference holes for cooperating with the chassis main positioning pin are opened on the outer walls of both the left and right positioning plates; as well as a positioning mechanism and an adjustment mechanism.

[0008] The positioning mechanism includes positioning blocks fixedly connected to the bottom of the left and right positioning plates. The positioning blocks are used to align and engage the subframe to be installed. The positioning mechanism also includes a tapered guide sleeve fixedly connected to the top of the left and right positioning plates. The tapered opening of the tapered guide sleeve faces upward and is coaxially arranged with the positioning reference hole. Furthermore, the adjustment mechanism includes a limiting plate fixedly connected to the outer wall of the slide plate. The limiting plate is used to prevent the slide plate from coming out of the guide plate groove. The adjustment mechanism also includes fixing blocks fixedly connected to the outer walls of the left and right positioning plates respectively, and telescopic springs fixedly connected to the two fixing blocks at both ends respectively.

[0009] Preferably, the top of the left positioning plate is also fixedly connected with an anti-misalignment positioning pin, which is used to cooperate with the preset reference structure of the chassis during installation to prevent the positioning plate from being installed in reverse, thus ensuring the correctness of the assembly from a structural perspective.

[0010] Preferably, a reinforcing rib is fixedly connected to the top of the right positioning plate. The reinforcing rib is integrally formed or welded along the length of the right positioning plate. The structure significantly enhances the structural rigidity of the right positioning plate when resisting installation pressure, ensuring that it will not deform under load and thus affect the positioning accuracy.

[0011] Preferably, the outer walls of the left positioning plate and the right positioning plate are also fixedly connected with spring hooks, with the hooks of the spring hooks facing the positioning block. This design allows them to be temporarily hooked onto the subframe after positioning is completed, achieving initial automatic fixing and thus freeing the operator's hands.

[0012] Preferably, the outer wall of the positioning block is fixedly connected with an elastic sleeve. When the positioning block is engaged with the mounting base of the subframe, the elastic sleeve can actively compensate for and eliminate the fit gap between the two due to manufacturing tolerances through its own elastic deformation, so as to achieve a tighter contact.

[0013] Preferably, the bottom of the left positioning plate and the right positioning plate are also fixedly connected with support protrusions. The bottom surface of the support protrusions and the bottom surface of the positioning block are located on the same plane and together serve as a support base surface to abut against the upper surface of the subframe to ensure that the entire positioning plate is fully fitted with the subframe and to avoid shaking or gaps caused by local unevenness.

[0014] Preferably, an anti-wear pad is fixedly connected to the outer wall of the left positioning plate on the surface that slides in contact with the right positioning plate. The anti-wear pad is preferably made of a wear-resistant material with a low coefficient of friction, which is used to reduce the friction and wear generated when the left positioning plate and the right positioning plate slide relative to each other during length adjustment.

[0015] Preferably, the fixing block on the left positioning plate and the fixing block on the right positioning plate are arranged opposite to each other in the length direction of the positioning plate, so that the telescopic spring is always in a stretched state, thereby continuously providing a restoring force to bring the left positioning plate and the right positioning plate closer together, which facilitates automatic retraction when not in use.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model solves the problem of existing positioning fixtures having a fixed length, being unable to adapt to different vehicle models' hole spacing, and having poor versatility by setting a sliding fit structure of a sliding plate and a guide plate groove between the left and right positioning plates. It achieves the technical effect of freely adjusting the length to adapt to multiple vehicle models, improving the versatility of the fixture and reducing costs.

[0018] 2. This utility model solves the problem of low efficiency, time and labor consumption caused by the difficulty in aligning the main positioning pin of the chassis with the positioning hole during installation by setting a tapered guide sleeve at the top of the positioning reference hole. It achieves the technical effect of quickly guiding the positioning pin into the hole, simplifying the alignment operation and significantly improving the installation efficiency.

[0019] 3. This utility model solves the problem of unstable position of the subframe during installation and the need for continuous hand support by the operator, which makes it inconvenient to tighten the bolts later, by setting a positioning block for engaging the subframe and a spring hook for temporary fixation. It achieves the technical effect of precise positioning and automatic temporary fixation of the subframe, ensuring positioning accuracy and freeing the operator's hands, thus improving the convenience and safety of operation. Attached Figure Description

[0020] Figure 1 A perspective view of the chassis subframe mounting hole precision positioning plate proposed in this utility model;

[0021] Figure 2 This is an exploded view of the sliding plate of the chassis subframe mounting hole precision positioning plate proposed in this utility model;

[0022] Figure 3 This is a cross-sectional view of the right positioning plate of the chassis subframe mounting hole precision positioning plate proposed in this utility model.

[0023] Figure 4 This is a schematic diagram of the positioning block of the chassis subframe mounting hole precision positioning plate proposed in this utility model.

[0024] Legend:

[0025] 1. Left positioning plate; 2. Right positioning plate; 3. Positioning mechanism; 301. Anti-misalignment positioning pin; 302. Conical guide sleeve; 303. Reinforcing rib; 304. Positioning reference hole; 305. Spring hook; 306. Positioning block; 307. Elastic sleeve; 308. Support protrusion; 4. Adjustment mechanism; 401. Slide plate; 402. Limiting plate; 403. Guide plate groove; 404. Anti-wear pad; 405. Fixing block; 406. Telescopic spring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4 This utility model provides a precise positioning plate for chassis subframe mounting holes, which aims to solve the problems of existing positioning fixtures for chassis subframe installation having a simple structure, unable to adjust the length to adapt to different hole spacings, and lacking efficient guiding and temporary fixing structures, resulting in difficulties in hole alignment and low positioning accuracy.

[0029] like Figure 1 and Figure 2As shown, the chassis subframe mounting hole precision positioning plate includes a left positioning plate 1 and a right positioning plate 2. The left positioning plate 1 and the right positioning plate 2 are slidably engaged through an adjustment mechanism 4 to adjust the overall length. A positioning mechanism 3 for precise positioning is integrated on both the left and right positioning plates 1 and 2. The adjustment mechanism 4 includes a sliding plate 401 fixedly connected to the outer wall of the left positioning plate 1. A guide groove 403 is provided on the outer wall of the right positioning plate 2 for the sliding plate 401 to slide in the length direction. A limiting plate 402 is also fixedly connected to the outer wall of the sliding plate 401. The width of the limiting plate 402 is greater than the width of the guide groove 403 to prevent the sliding plate 401 from dislodging from the guide groove 403. Automatic reset is achieved through this mechanism. Fixing blocks 405 are fixedly connected to the outer walls of the left positioning plate 1 and the right positioning plate 2. The two fixing blocks 405 are connected by telescopic springs 406 fixedly connected at both ends. The positioning mechanism 3 includes positioning reference holes 304 opened on the outer walls of the left positioning plate 1 and the right positioning plate 2. The positioning reference holes 304 are used to cooperate with the main positioning pin of the chassis. In order to achieve rapid guidance, tapered guide sleeves 302 are fixedly connected to the top of the left positioning plate 1 and the right positioning plate 2. The tapered opening of the tapered guide sleeve 302 faces upward and is coaxially arranged with the positioning reference hole 304. The positioning mechanism 3 also includes positioning blocks 306 fixedly connected to the bottom of the left positioning plate 1 and the right positioning plate 2. The positioning blocks 306 are used to align and engage the subframe to be installed.

[0030] Please refer to Figure 1 , Figure 3 and Figure 4To prevent the entire positioning plate from being assembled backwards during installation, a mis-alignment positioning pin 301 is fixedly connected to the top of the left positioning plate 1. The mis-alignment positioning pin 301 is used to form a unique mating relationship with the preset reference structure of the chassis during installation, thereby achieving a foolproof function. To enhance the structural stability of the plate body when bearing the weight of the subframe and the installation pressure, a reinforcing rib 303 is fixedly connected to the top of the right positioning plate 2. The reinforcing rib 303 is integrally formed or welded along the length direction of the right positioning plate 2, effectively improving the structural rigidity of the right positioning plate 2 and ensuring that the position of the positioning reference hole 304 will not shift under force. To achieve temporary fixation of the subframe after positioning is completed to free the operator's hands, spring hooks 305 are fixedly connected to the outer walls of the left positioning plate 1 and the right positioning plate 2. The hook part of the spring hook 305 is set towards the positioning block 306. When the positioning plate is in place with the subframe, the spring hook 305 can automatically hook onto the subframe. To address the issue of clearance caused by manufacturing tolerances when the positioning block 306 engages with the subframe, an elastic sleeve 307 is fixedly connected to the outer wall of the positioning block 306 on the edge or specific structure of the frame. When the positioning block 306 engages with the mounting reference part of the subframe, the elastic sleeve 307 can fill and eliminate the gap through its own elastic deformation, achieving a tighter gapless positioning. To ensure that the positioning plate and the surface of the subframe can be completely attached and to avoid tilting or gaps caused by local unevenness, a support protrusion 308 is fixedly connected to the bottom of the left positioning plate 1 and the right positioning plate 2. The bottom surface of the support protrusion 308 and the bottom surface of the positioning block 306 are located on the same plane and together serve as the support reference for the upper surface of the subframe. To reduce the friction and wear generated when the left positioning plate 1 and the right positioning plate 2 slide relative to each other during length adjustment, an anti-wear pad 404 is fixedly connected to the outer wall of the left positioning plate 1 on the surface that slides in contact with the right positioning plate 2.

[0031] In a preferred embodiment, the fixing block 405 on the left positioning plate 1 and the fixing block 405 on the right positioning plate 2 are arranged opposite to each other in the length direction of the positioning plates, so that the stretching direction of the telescopic spring 406 is parallel to the sliding adjustment direction of the two plates. When not in use, the telescopic spring 406 is always in a stretched state, and the contraction force generated by it can automatically drive the left positioning plate 1 and the right positioning plate 2 to move closer to each other and reset, which is convenient for storage and the next use.

[0032] As another preferred embodiment, the anti-misalignment positioning pin 301, tapered guide sleeve 302, reinforcing rib 303, positioning block 306, and support protrusion 308 in the positioning mechanism 3 can all be fixed to the left positioning plate 1 or the right positioning plate 2 by welding or bolt connection, while the spring hook 305 is preferably integrally bent or fixed by riveting to ensure its structural strength and elasticity.

[0033] In another preferred embodiment, the sliding plate 401, limiting plate 402, fixing block 405 and anti-wear pad 404 in the adjusting mechanism 4 can also be fixed to the corresponding positions of the left positioning plate 1 or the right positioning plate 2 by means of welding, bolting or bonding. The material of the anti-wear pad 404 is preferably polytetrafluoroethylene or high molecular wear-resistant plastic to obtain a lower coefficient of friction and a longer service life.

[0034] Working principle: After fixing the left positioning plate 1 and right positioning plate 2 under the chassis, the positioning mechanism 3 includes an anti-misalignment positioning pin 301. The bottom of the anti-misalignment positioning pin 301 is fixedly connected to the top of the left positioning plate 1 to prevent the entire plate from being installed backwards. The tops of both the left positioning plate 1 and the right positioning plate 2 are fixedly connected to tapered guide sleeves 302, allowing the main positioning pin of the chassis to be inserted even without precise alignment. It first touches the inclined surface of the flared end and then slides into the reference hole, solving the problem of misalignment during installation. The top of the right positioning plate 2 is fixedly connected to a reinforcing rib 303, making the plate more robust and preventing it from being bent, ensuring that the position of the positioning hole remains unchanged. The outer walls of both the left positioning plate 1 and the right positioning plate 2 are provided with positioning reference holes 304, corresponding to the main positioning pin on the chassis. Inserting into this hole will instantly ensure the correct positioning. The positioning plates and chassis are positioned. Spring hooks 305 are fixedly connected to the outer walls of the left positioning plate 1 and the right positioning plate 2. After positioning, they are temporarily fixed and will automatically lock the subframe without needing to hold it by hand, making it easier to tighten bolts later. Positioning blocks 306 are fixedly connected to the bottom of the left positioning plate 1 and the right positioning plate 2. They are aligned and locked to the subframe to be installed, so that the holes on the subframe and the holes on the chassis are consistent. Elastic sleeves 307 are fixedly connected to the outer walls of the positioning blocks 306, which can compensate for any gaps that exist through elasticity. Support protrusions 308 are fixedly connected to the bottom of the left positioning plate 1 and the right positioning plate 2, which can avoid local gaps caused by unevenness of the plates and ensure that the subframe and the positioning plates are completely close together. The whole process achieves precise positioning and installation of the subframe and reduces errors.

[0035] Furthermore, when the length of the plate needs to be adjusted to accommodate different hole positions, the adjustment mechanism 4 includes a sliding plate 401. The sliding plate 401 is fixedly connected to the outer wall of the left positioning plate 1 and can slide on the inner wall of the right positioning plate 2 to adjust the length of the entire plate. A limit plate 402 is fixedly connected to the outer wall of the sliding plate 401 to prevent the sliding plate 401 from sliding out of the guide plate groove 403, thus playing a limiting role. The outer wall of the right positioning plate 2 has a guide plate groove 403 to accommodate the sliding plate 401 to slide inside. An anti-wear pad 404 is fixedly connected to the outer wall of the left positioning plate 1 to reduce the friction generated when the left positioning plate 1 and the right positioning plate 2 collide. Fixed blocks 405 are fixedly connected to the outer walls of both the left positioning plate 1 and the right positioning plate 2 to provide an installation base for the telescopic spring 406. A telescopic spring 406 is fixedly connected between the adjacent fixed blocks 405, which can drive the two positioning plates to reset when not in use. The whole system realizes the free adjustment of the length of the plate without the need to frequently replace plates of different lengths.

Claims

1. A chassis subframe mounting hole precision positioning plate, which includes a left positioning plate (1) and a right positioning plate (2) that are in sliding fit. The outer wall of the left positioning plate (1) is fixedly connected to a sliding plate (401). The outer wall of the right positioning plate (2) is provided with a guide plate groove (403) for the sliding plate (401) to slide in the length direction. The outer walls of the left positioning plate (1) and the right positioning plate (2) are both provided with positioning reference holes (304) for cooperating with the chassis main positioning pin. Its features are, The positioning plate also includes a positioning mechanism (3) and an adjustment mechanism (4). The positioning mechanism (3) includes a positioning block (306) fixedly connected to the bottom of the left positioning plate (1) and the right positioning plate (2). The positioning block (306) is used to align and engage the subframe to be installed. The positioning mechanism (3) also includes a tapered guide sleeve (302) fixedly connected to the top of the left positioning plate (1) and the right positioning plate (2). The tapered opening of the tapered guide sleeve (302) faces upward and is coaxially arranged with the positioning reference hole (304). The adjustment mechanism (4) includes a limiting plate (402) fixedly connected to the outer wall of the slide plate (401), the limiting plate (402) is used to prevent the slide plate (401) from coming out of the guide plate groove (403), the adjustment mechanism (4) also includes fixing blocks (405) fixedly connected to the outer walls of the left positioning plate (1) and the right positioning plate (2) respectively, and telescopic springs (406) fixedly connected to the two fixing blocks (405) at both ends respectively.

2. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, The top of the left positioning plate (1) is also fixedly connected with an anti-misalignment positioning pin (301), which is used to cooperate with the preset reference structure of the chassis during installation to prevent the positioning plate from being installed in reverse.

3. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, The top of the right positioning plate (2) is also fixedly connected with a reinforcing rib (303). The reinforcing rib (303) is integrally formed or welded along the length direction of the right positioning plate (2) to enhance the structural rigidity of the right positioning plate (2) against installation pressure.

4. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, The outer walls of the left positioning plate (1) and the right positioning plate (2) are also fixedly connected with spring hooks (305). The hooks of the spring hooks (305) are set facing the positioning block (306) and are used to temporarily hook onto the subframe after positioning to achieve initial fixation.

5. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, An elastic sleeve (307) is fixedly connected to the outer wall of the positioning block (306). When the positioning block (306) is engaged with the mounting base of the subframe, the elastic sleeve (307) compensates for the fit gap between the two through its own elastic deformation.

6. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, The bottom of the left positioning plate (1) and the right positioning plate (2) are also fixedly connected with support protrusions (308). The bottom surface of the support protrusions (308) and the bottom surface of the positioning block (306) are located on the same plane and are used to abut against the upper surface of the subframe to ensure full fit.

7. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, On the outer wall of the left positioning plate (1), a wear-resistant pad (404) is fixedly connected to the surface that slides in contact with the right positioning plate (2). The wear-resistant pad (404) is used to reduce the friction and wear generated when the left positioning plate (1) and the right positioning plate (2) slide relative to each other to adjust the length.

8. The chassis subframe mounting hole precision positioning plate according to claim 1, characterized in that, The fixing block (405) on the left positioning plate (1) and the fixing block (405) on the right positioning plate (2) are arranged opposite to each other in the length direction of the positioning plate. The telescopic spring (406) is always in a stretched state to provide a restoring force that brings the left positioning plate (1) and the right positioning plate (2) closer together.

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