Fool-proof assembly structure of front auxiliary frame suspension sleeve

Abstract

The utility model belongs to the technical field of automobile manufacturing, and particularly relates to a fool-proof assembly structure of a front auxiliary frame suspension sleeve, which comprises a first sleeve and a second sleeve, the first sleeve comprises a first sleeve body and a first limiting ring plate; the second sleeve comprises a second sleeve body and a second limiting ring plate; the first sleeve body is located in the mounting through hole in the lower cross beam, and the second sleeve body is located in the mounting through holes in the left longitudinal beam and the right longitudinal beam; the lower end faces of the first limiting ring plate and the second limiting ring plate abut against the upper surface of the frame body. The first sleeve is provided with a first fool-proof hole, and the second sleeve is provided with a second fool-proof hole. One of the first fool-proof hole and the second fool-proof hole is smaller in aperture and deeper in hole depth; the first positioning pin is arranged in the first fool-proof hole; the second positioning pin is arranged in the second fool-proof hole; the first positioning pin is matched with the first fool-proof hole, and the second positioning pin is matched with the second fool-proof hole, so that correct assembly of the suspension sleeve is ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile manufacturing, and particularly relates to a fool-proof assembly structure for a front auxiliary frame suspension sleeve. Background Art

[0002] The automobile subframe is a bracket that supports the front and rear axles and suspension. The axles and suspension are connected to the vehicle body through it, which has the function of blocking vibration and noise and improving the comfort of the vehicle. The subframe generally includes the front subframe and the rear frame. Most cars are front-drive, and the engine of the front-drive car is installed on the front subframe. Therefore, the front subframe is provided with an engine mounting structure.

[0003] The front subframe of a certain model of car is shown in the attached Figure 3 As shown, it includes a frame body 1 and a plurality of suspension sleeves welded on the frame body 1, and the shapes and sizes of the plurality of suspension sleeves are the same. The frame body 1 includes a left longitudinal beam 11 and a right longitudinal beam 12 arranged in parallel, and also includes a front cross beam 13 and a rear cross beam 14 connecting the left longitudinal beam 11 and the right longitudinal beam 12 together, and the front cross beam 13 and the rear cross beam 14 are arranged at intervals. Among them, the upper surfaces of the left longitudinal beam 11 and the right longitudinal beam 12 are 2 mm higher than the upper surface of the rear cross beam 14. The left longitudinal beam 11, the right longitudinal beam 12 and the rear cross beam 14 are all provided with mounting through holes, and the plurality of mounting through holes are arranged in the same direction. The suspension sleeve includes a coaxially arranged sleeve body, which is used to position and install the sleeve in the installation through hole of the frame body 1. A radially outwardly convex limiting ring plate is provided on the outer wall of one end of the sleeve body, and one end face of the limiting ring plate is flush with the end face of the sleeve body. A threaded hole for installing the engine suspension bracket is provided on the end face of the suspension sleeve close to the limiting ring plate. When assembling the suspension sleeve, the frame body 1 is first placed on a horizontal positioning tool, and the horizontal positioning tool is provided with a plurality of positioning pins perpendicular to the horizontal plane, and the positioning pins are located in the installation through hole. Then, the suspension sleeve is installed in the installation through hole on the frame body 1 and sleeved on the positioning pins. The positioning pins position the suspension sleeve in the horizontal direction, and the suspension sleeves on the plurality of positioning pins cooperate with each other to position the frame body 1, so that the positioning pins and the suspension sleeve are coaxial. The limiting ring plate on the sleeve abuts against the upper surface of the frame body 1 to position the suspension sleeve at its axial upper limit. Finally, the suspension sleeve is welded to the frame body 1. The upper end surface of the limiting ring plate is a supporting surface for supporting the engine suspension bracket.

[0004] Due to the update and iteration of automobile products, the engine model and engine suspension bracket installed on the front subframe have undergone design changes. Due to the restrictions on the shape and installation size of the engine suspension bracket, the suspension sleeve support surface installed on the rear cross beam 14 should be flush with other suspension sleeve support surfaces. Therefore, the thickness of some sleeve limit ring plates needs to be changed. Figure 1-2As shown, the changed suspension sleeve includes a first sleeve 2 and a second sleeve 3 of equal axial length. The thickness of the first limiting ring plate 22 on the first sleeve 2 is less than the thickness of the second limiting ring plate 32 on the second sleeve 3, and the difference between the two is 2 mm. However, because the two suspension sleeves have the same shape and the size difference is very small, the operators need to carefully compare and distinguish them during assembly and welding. What is more serious is that the two suspension sleeves can be mixed in the installation through hole on the frame body 1. Even if they are installed incorrectly, they are not easy to be visually detected and will only be discovered in the subsequent engine suspension bracket installation process. In order to ensure the production quality of the front subframe, the quality inspectors are also required to use measuring tools to measure the support surface heights on multiple sleeves respectively, that is, to compare the thickness of the limiting ring plates on each suspension sleeve. The above production method increases the workload of installation operators and quality inspectors, wastes manpower and material resources, is costly and has low production efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a fool-proof assembly structure for a front auxiliary frame suspension sleeve, so that the suspension sleeve can be correctly assembled on the frame body, thereby improving assembly quality, saving manpower and improving production efficiency.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a front sub-frame suspension sleeve fool-proof assembly structure, including a first sleeve and a second sleeve; the first sleeve includes a first sleeve body, and a first limiting ring plate is provided at the upper end of the first sleeve body; the second sleeve includes a second sleeve body, and a second limiting ring plate is provided at the upper end of the second sleeve body, and the thickness of the second limiting ring plate is greater than that of the first limiting ring plate; the first sleeve body is located in the installation through hole on the rear cross beam, and the second sleeve body is located in the installation through holes on the left longitudinal beam and the right longitudinal beam; the lower end surfaces of the first limiting ring plate and the second limiting ring plate are in contact with the upper surface of the frame body;

[0007] A first fool-proof hole is provided on the end surface of the first sleeve away from the first limiting ring plate, and a second fool-proof hole is provided on the end surface of the second sleeve away from the second limiting ring plate; one of the first fool-proof hole and the second fool-proof hole has a smaller hole diameter and a deeper hole depth;

[0008] It also includes a first locating pin and a second locating pin, the first locating pin is located in the first fool-proof hole, and the second locating pin is located in the second fool-proof hole; the first locating pin is adapted to the shape and size of the first fool-proof hole, and the second locating pin is adapted to the shape and size of the second fool-proof hole.

[0009] Furthermore, the hole depth of the first fool-proof hole is greater than the hole depth of the second fool-proof hole, and the hole diameter of the first fool-proof hole is smaller than the hole diameter of the second fool-proof hole.

[0010] Furthermore, the hole depth of the first fool-proof hole is smaller than the hole depth of the second fool-proof hole, and the hole diameter of the first fool-proof hole is larger than the hole diameter of the second fool-proof hole.

[0011] Furthermore, the first fool-proof hole and the second fool-proof hole are both round holes.

[0012] Furthermore, the difference in hole depth between the first fool-proof hole and the second fool-proof hole is greater than or equal to 10 mm.

[0013] Furthermore, the first positioning pin is a stepped shaft structure that is compatible with the shape and size of the inner cavity of the first sleeve; the second positioning pin is a stepped shaft structure that is compatible with the shape and size of the inner cavity of the second sleeve.

[0014] Furthermore, guide portions are provided at the upper ends of the first positioning pin and the second positioning pin.

[0015] Compared with the prior art, the beneficial effects of the utility model are: providing a fool-proof assembly structure for the suspension sleeve of the front subframe, ensuring the correct assembly of the first sleeve and the second sleeve by setting a fool-proof hole and a locating pin matched with the fool-proof hole, the operator can easily distinguish the two sleeves during the assembly process, even if the two sleeves are mixed or installed incorrectly, it can be discovered and corrected in time, and subsequent quality inspectors do not need to check whether the two sleeves are mixed or installed incorrectly, thereby improving the assembly quality of the two sleeves on the front subframe, reducing the workload of quality inspectors, reducing the labor intensity of assemblers and quality inspectors, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the first sleeve in the background technology;

[0017] Figure 2 It is a structural schematic diagram of the second sleeve in the background technology;

[0018] Figure 3 It is a schematic diagram of the assembly structure of the positioning pin, the sleeve and the frame body in the background technology;

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the first sleeve in the first embodiment of the utility model;

[0020] Figure 5 It is a schematic cross-sectional structure diagram of the second sleeve in the first embodiment of the utility model;

[0021] Figure 6 It is a schematic diagram of the top view structure of the utility model;

[0022] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure along the middle section line AA;

[0023] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure along the middle section line BB;

[0024] Figure markings: 1-frame body; 11-left longitudinal beam; 12-right longitudinal beam; 13-front cross beam; 14-rear cross beam; 2-first sleeve; 21-first sleeve body; 22-first limiting ring plate; 23-first fool-proof hole; 3-second sleeve; 31-second sleeve body; 32-second limiting ring plate; 33-second fool-proof hole; 41-first positioning pin; 42-second positioning pin; 43-guide part. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. To facilitate the explanation of the technical solution, the "suspension sleeve" is referred to as "sleeve" in the following text of the present application.

[0026] As attached Figure 4-8 As shown, a foolproof assembly structure of a front subframe suspension sleeve includes a first sleeve 2 and a second sleeve 3; the first sleeve 2 includes a first sleeve body 21, and a first limiting ring plate 22 is provided at the upper end of the first sleeve body 21; the second sleeve 3 includes a second sleeve body 31, and a second limiting ring plate 32 is provided at the upper end of the second sleeve body 31, and the thickness of the second limiting ring plate 32 is greater than the thickness of the first limiting ring plate 22; the first sleeve body 21 is located in the mounting through hole on the rear cross beam 14, and the second sleeve body 31 is located in the mounting through holes on the left longitudinal beam 11 and the right longitudinal beam 12; the lower end surfaces of the first limiting ring plate 22 and the second limiting ring plate 32 are aligned with the frame body 1; a first fool-proof hole 23 is provided on the end surface of the first sleeve 2 away from the first limiting ring plate 22, and a second fool-proof hole 33 is provided on the end surface of the second sleeve 3 away from the second limiting ring plate 32, and one of the first fool-proof hole 23 and the second fool-proof hole 33 has a smaller hole diameter and a deeper hole depth; and further comprising a first locating pin 41 and a second locating pin 42, the first locating pin 41 is located in the first fool-proof hole 23, and the second locating pin 42 is located in the second fool-proof hole 33; the first locating pin 41 is adapted to the shape and size of the first fool-proof hole 23, and the second locating pin 42 is adapted to the shape and size of the second fool-proof hole 33.

[0027] The first foolproof hole 23 is larger than the aperture of the cavity of the first sleeve body 21 and the two form a stepped through hole, and the second foolproof hole 33 is larger than the aperture of the cavity of the second sleeve body 31 and the two form a stepped through hole. The "matching of shapes and sizes" means that there is no gap between the first positioning pin 41 and the first foolproof hole 23, and there is no gap between the second positioning pin 42 and the second foolproof hole 33. "One of the first foolproof hole 23 and the second foolproof hole 33 has a smaller aperture and a deeper hole depth" includes the following two embodiments:

[0028] Embodiment 1: The hole depth of the first fool-proof hole 23 is greater than the hole depth of the second fool-proof hole 33 , and the hole diameter of the first fool-proof hole 23 is smaller than the hole diameter of the second fool-proof hole 33 .

[0029] Embodiment 2: The hole depth of the first fool-proof hole 23 is smaller than the hole depth of the second fool-proof hole 33 , and the hole diameter of the first fool-proof hole 23 is larger than the hole diameter of the second fool-proof hole 33 .

[0030] The above scheme is explained below by taking the first embodiment as an example. When assembling the first sleeve 2 and the second sleeve 3 on the frame body 1, if the first sleeve 2 is mistakenly installed at the installation through hole on the left longitudinal beam 11 or the right longitudinal beam 12, because the aperture of the first fool-proof hole 23 is smaller than the aperture of the second fool-proof hole 33, the aperture of the first fool-proof hole 23 is also smaller than the outer diameter of the second positioning pin 42, and the second positioning pin 42 cannot be accommodated, resulting in the first sleeve 2 being inserted into the installation through hole on the left longitudinal beam 11 or the right longitudinal beam 12, but being unable to be fully pressed down so that the first limit ring plate 22 abuts against the upper surface of the frame body 1, and the installation cannot be completed. Correspondingly, if the second sleeve 3 is mistakenly installed at the installation through hole on the rear cross beam 14, although the aperture of the second fool-proof hole 33 is larger than the outer diameter of the first locating pin 41 and can be sleeved on the outer periphery of the first locating pin 41, because the depth of the first fool-proof hole 23 is greater than the depth of the second fool-proof hole 24, the height of the abutting surface on the first locating pin 41 for abutting the bottom wall of the first fool-proof hole 23 from the bottom surface of the locating pin is greater than the depth of the second fool-proof hole 24, which makes the second limiting ring plate 32 on the second sleeve 2 also unable to abut against the upper surface of the frame body 1. Therefore, the first sleeve 2 and the second sleeve 3 cannot be mixed in the installation through hole on the frame body 1. The same is true for the second embodiment. The operating personnel can easily distinguish the two sleeves during the assembly process. Even if the two sleeves are mixed or installed incorrectly, they can be discovered and adjusted in time to ensure that the two sleeves can be accurately installed on the frame body 1. Subsequent quality inspectors do not need to check whether the two sleeves are mixed or installed incorrectly, thereby improving the assembly quality of the two sleeves on the front subframe, reducing the workload of quality inspectors, reducing the labor intensity of assemblers and quality inspectors, and improving production efficiency.

[0031] The first foolproof hole 23 is used to ensure that the operator accurately installs the first sleeve body 21 in the installation through hole on the rear cross beam 14, and the second foolproof hole 33 is used to ensure that the operator accurately installs the second sleeve body 31 in the installation through holes on the left longitudinal beam 11 and the right longitudinal beam 12. The first foolproof hole 23 and the second foolproof hole 33 can be round holes, square holes or other polygonal holes. For the convenience of processing, preferably, the first foolproof hole 23 and the second foolproof hole 33 are both round holes. Preferably, the hole depth difference between the first foolproof hole 23 and the second foolproof hole 33 is greater than or equal to 10mm. When the two sleeves are assembled incorrectly, the structural difference is more obvious, which further facilitates the assembly operator to quickly find the assembly error and make timely adjustments.

[0032] The first locating pin 41 and the second locating pin 42 can be an optical axis or a stepped axis. The installation stability of the sleeve is positively correlated with the length of the locating pin. Preferably, the first locating pin 41 is a stepped axis structure that matches the shape and size of the inner cavity of the first sleeve 2; the second locating pin 42 is a stepped axis structure that matches the shape and size of the inner cavity of the second sleeve 3. "Shape and size match" here means that there is no gap between the first locating pin 41 and the inner wall of the first sleeve 2, and there is no gap between the second locating pin 42 and the inner wall of the first sleeve 2, which increases the length of the two locating pins, improves the stability of the sleeve installation and positioning, avoids the sleeve from deflecting on the vertical plane perpendicular to the horizontal plane after assembly, and improves the sleeve installation and welding accuracy. As a further preference, the upper ends of the first locating pin 41 and the second locating pin 42 are provided with a guide portion 43 to facilitate the installation of the sleeve. The guide portion 43 is generally a guide shaft that is thin at the top and thick at the bottom.

[0033] In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the figures, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationships in the figures are only used for illustrative purposes and cannot be construed as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

Claims

1. A front sub-frame suspension sleeve fool-proof assembly structure, comprising a first sleeve (2) and a second sleeve (3); the first sleeve (2) comprises a first sleeve body (21), the upper end of which is provided with a first limiting ring plate (22); the second sleeve (3) comprises a second sleeve body (31), the upper end of which is provided with a second limiting ring plate (32), the thickness of the second limiting ring plate (32) being greater than the thickness of the first limiting ring plate (22); the first sleeve body (21) is located in a mounting through hole on a rear cross beam (14), and the second sleeve body (31) is located in a mounting through hole on a left longitudinal beam (11) and a right longitudinal beam (12); the lower end surfaces of the first limiting ring plate (22) and the second limiting ring plate (32) are in contact with the upper surface of the frame body (1); characterized in that: A first fool-proof hole (23) is provided on the end surface of the first sleeve (2) away from the first limiting ring plate (22), and a second fool-proof hole (33) is provided on the end surface of the second sleeve (3) away from the second limiting ring plate (32); one of the first fool-proof hole (23) and the second fool-proof hole (33) has a smaller hole diameter and a deeper hole depth; It also includes a first positioning pin (41) and a second positioning pin (42), wherein the first positioning pin (41) is located in the first fool-proof hole (23), and the second positioning pin (42) is located in the second fool-proof hole (33); the first positioning pin (41) is adapted to the shape and size of the first fool-proof hole (23), and the second positioning pin (42) is adapted to the shape and size of the second fool-proof hole (33).

2. The foolproof assembly structure of the front subframe suspension sleeve according to claim 1 is characterized in that: The hole depth of the first fool-proof hole (23) is greater than the hole depth of the second fool-proof hole (33), and the hole diameter of the first fool-proof hole (23) is smaller than the hole diameter of the second fool-proof hole (33).

3. The foolproof assembly structure of the front subframe suspension sleeve according to claim 1, characterized in that: The hole depth of the first fool-proof hole (23) is smaller than the hole depth of the second fool-proof hole (33), and the hole diameter of the first fool-proof hole (23) is larger than the hole diameter of the second fool-proof hole (33).

4. The foolproof assembly structure of the front subframe suspension sleeve according to claim 1, characterized in that: The first fool-proof hole (23) and the second fool-proof hole (33) are both round holes.

5. The foolproof assembly structure of the front subframe suspension sleeve according to claim 1, characterized in that: The difference in hole depth between the first fool-proof hole (23) and the second fool-proof hole (33) is greater than or equal to 10 mm.

6. The foolproof assembly structure of the front subframe suspension sleeve according to any one of claims 1 to 5, characterized in that: The first positioning pin (41) is a stepped shaft structure that matches the shape and size of the inner cavity of the first sleeve (2); the second positioning pin (42) is a stepped shaft structure that matches the shape and size of the inner cavity of the second sleeve (3).

7. The foolproof assembly structure of the front subframe suspension sleeve according to claim 6, characterized in that: The upper ends of the first positioning pin (41) and the second positioning pin (42) are provided with guide portions (43).

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