Rear shock absorber guide sleeve of vehicle shock absorber
The car shock absorber rear guide sleeve addresses suboptimal damping by using a high-pressure cast design with angled and planar transitions to enhance guidance and durability, ensuring smoother operation and extended lifespan at low cost.
Patent Information
- Application Number
- CN202423027388.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The design of existing automobile shock absorber guide sleeves is unreasonable, which affects the vibration absorption effect, resulting in poor vehicle vibration absorption and poor riding comfort.
A rear-reduction guide sleeve for automotive shock absorbers is designed, and manufactured by metal powder high-pressure die-casting process, including setting a limiting boss and positioning bayonet on the guide sleeve body, and optimizing the structure through a combined transition surface to ensure high-precision assembly and reduce stress concentration.
High-precision assembly of the guide sleeve is realized, reducing manufacturing costs, and improving riding comfort and service life.
Smart Images
Figure CN223105129U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive shock absorbers, in particular to the guide sleeve of the shock absorber of BYD EM2 model, and specifically to the rear shock absorber guide sleeve for vehicle use. Background Art
[0002] The automotive shock absorber guide sleeve is an important component in the automotive shock absorber. It is used to guide the up and down movement of the piston rod in the shock absorber when the vehicle bumps, so as to ensure the smoothness of the piston rod during operation and reduce the bumps of the vehicle during driving. If the design of the shock absorber guide sleeve is not reasonable enough, it will affect the shock absorption effect of the shock absorber, resulting in poor vibration absorption of the vehicle and easily causing obvious discomfort to the passengers in the vehicle. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a rear shock absorber guide sleeve for vehicle use with simple structure, low manufacturing cost, reliable performance and good guiding ability in view of the above-mentioned current situation of the prior art.
[0004] The technical solution adopted by the utility model to solve the above technical problem is as follows:
[0005] A rear shock absorber guide sleeve for vehicle use includes a guide sleeve body with a convex shoulder formed at the upper end, and a central guide hole is formed through the guide sleeve body from top to bottom. A limiting boss with a height less than that of the convex shoulder is formed at the lower part of the outer peripheral surface of the convex shoulder, and four limiting notches opening outward are formed on the limiting boss at an angular interval of 90 degrees in the circumferential direction; four positioning notches opening upward are formed on the annular table surface at the top of the guide sleeve body at an angular interval of 90 degrees in the circumferential direction; the limiting notches and the positioning notches are arranged at an angular interval of 45 degrees in the circumferential direction on the guide sleeve body.
[0006] To optimize the above technical solution, the following measures are also included:
[0007] The above central guide hole is composed of a tapered concave cavity, a cylindrical stepped hole, a transition connecting hole and a cylindrical hole which are connected in sequence from top to bottom; and the tapered concave cavity, the cylindrical stepped hole and the transition connecting hole are all located in the convex shoulder of the guide sleeve body.
[0008] The depth of the above positioning notch is less than the depth of the tapered concave cavity, and the two side surfaces of the positioning notch are inclined surfaces with an inclination angle of 5 degrees.
[0009] The minimum diameter of the above tapered concave cavity is larger than the diameter of the cylindrical stepped hole, the diameter of the cylindrical stepped hole is larger than the diameter of the transition connecting hole, and a combined transition surface composed of an annular plane and an inclined conical surface is formed at the connection between the cylindrical stepped hole and the bottom of the tapered concave cavity and at the connection between the transition connecting hole and the stepped surface of the cylindrical stepped hole. The taper angle of the inclined conical surface in the combined transition surface is 60 degrees.
[0010] The diameter of the above-mentioned cylindrical hole is larger than that of the transition connection hole and smaller than that of the cylindrical stepped hole; a combined inlet composed of a cylindrical surface and a conical surface is formed at the port of the cylindrical hole; the taper angle of the conical surface is 15 degrees.
[0011] On the above-mentioned guide sleeve body, a tiny diameter-increasing part is provided below the convex shoulder part, and a transition inclined surface of 165 degrees is formed between the connection of the diameter-increasing part and the outer circumferential surface of the guide sleeve body; a combined transition surface composed of an annular flat surface and an inclined conical surface is also formed between the bottom surface of the guide sleeve body and the outer circumferential surface of the guide sleeve body as well as on the limit convex platform.
[0012] Compared with the prior art, in the rear damping guide sleeve of the present utility model, a limit convex platform with a height less than that of the convex shoulder part is formed at the lower part of the outer circumferential surface of the guide sleeve convex shoulder part, and a limit bayonet is also formed on the limit convex platform. Four positioning bayonets are also formed on the annular table surface at the top of the guide sleeve, so that the present invention has higher assembly accuracy during assembly. The present utility model is die-cast from metal powder by a high-pressure die-casting process, and the product has low manufacturing cost, light weight, high strength, and can ensure the smooth operation of the shock absorber piston rod after installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is the front view structural schematic diagram of the present utility model;
[0014] Figure 2 is Figure 1 the sectional view taken along the line A-A in
[0015] Figure 3 is Figure 1 the sectional view taken along the line B-B in
[0016] Figure 4 is Figure 2 the partial enlarged schematic diagram at position I in
[0017] Figure 5 is Figure 2 the partial enlarged schematic diagram at position II in
[0018] Figure 6 is Figure 2 the partial enlarged schematic diagram at position III in
[0019] Figure 7 is Figure 2 the partial enlarged schematic diagram at position IV in DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following further describes the embodiments of the present utility model in detail with reference to the accompanying drawings.
[0021] Figures 1 to 7 is the structural schematic diagram of the present utility model.
[0022] The accompanying reference numerals are: central guide hole K, guide sleeve body 1, conical concave cavity 1a, cylindrical stepped hole 1b, transition connection hole 1c, cylindrical hole 1e, convex shoulder 11, limit boss 2, limit bayonet 21, annular table surface 3, positioning bayonet 31, combined transition surface 4, annular flat surface 41, inclined conical surface 42, combined guide inlet 5, cylindrical surface 51, conical surface 52.
[0023] As Figures 1 to 7 shown, the present utility model discloses a rear shock absorber guide sleeve for a vehicle, which is applied to the shock absorber assembly of the BYD EM2 model. It is an integral part integrally die-cast from metal powder by a high-pressure die-casting process. The density of its powder metallurgy is > 6.4 g / cm³, and the surface hardness is GRB40 - 75. The rear shock absorber guide sleeve for a vehicle includes a guide sleeve body 1 with a convex shoulder 11 formed at the upper end. A central guide hole K is formed through the guide sleeve body 1 from top to bottom. The outer diameter of the guide sleeve body 1 is 32 mm, and it can be sleeved on the working cylinder of the shock absorber. In the present invention, a limit boss 2 with a height less than that of the convex shoulder 11 is formed at the lower part of the outer peripheral surface of the convex shoulder 11. The diameter of the limit boss 2 is 39 mm, and the limit boss 2 is used to cooperate with the oil storage cylinder of the shock absorber. The total height of the guide sleeve of the present utility model is 21.5 mm, and the height of the convex shoulder 11 is 7.1 mm. The height of the limit boss 2 of the present invention is 4.1 mm. Four limit bayonets 21 opening outward are formed on the limit boss 2 at an angular interval of 90 degrees in the circumferential direction. The limit bayonets 21 can ensure the precise assembly of the guide sleeve and the oil storage cylinder and prevent circumferential rotation of the two after assembly. An annular table surface 3 is formed at the top of the guide sleeve body 1. Four positioning bayonets 31 opening upward are formed in the annular table surface 3 at an angular interval of 90 degrees in the circumferential direction. As Figure 1 can be seen, in the front view, the limit bayonets 21 and the positioning bayonets 31 of the present utility model are arranged on the guide sleeve body 1 at an angular interval of 45 degrees in the circumferential direction.
[0024] As Figure 2 shown, the central guide hole K of the present utility model is composed of a conical concave cavity 1a, a cylindrical stepped hole 1b, a transition connection hole 1c, and a cylindrical hole 1e that are sequentially connected from top to bottom; and the conical concave cavity 1a, the cylindrical stepped hole 1b, and the transition connection hole 1c are all located in the convex shoulder 11 of the guide sleeve body 1. The depth of the cylindrical hole 1e of the present utility model is 14.4 mm, the depth of the conical concave cavity 1a is 1.6 mm, the depth of the cylindrical stepped hole 1b is 3.5 mm, and the depth of the transition connection hole 1c is 2 mm.
[0025] In the embodiment, the depth of the positioning bayonet 31 of the present utility model is 1 mm, and its depth is less than that of the conical concave cavity 1a. And as Figure 3As shown, the two side surfaces of the positioning bayonet 31 are inclined surfaces with an inclination angle of 5 degrees.
[0026] In the embodiment, as Figure 2 shown, the minimum diameter of the conical cavity 1a of the present utility model is larger than the diameter of the cylindrical stepped hole 1b, and the diameter of the cylindrical stepped hole 1b is larger than the diameter of the transition connecting hole 1c. And as Figure 6 shown, a combined transition surface 4 composed of an annular plane 41 and an inclined conical surface 42 is formed at the connection between the cylindrical stepped hole 1b and the bottom of the conical cavity 1a and at the connection between the transition connecting hole 1c and the stepped surface of the cylindrical stepped hole 1b. The taper angle of the inclined conical surface 42 in the combined transition surface 4 is 60 degrees. The combined transition surface 4 can more effectively prevent stress concentration, thereby improving the service life of the product.
[0027] In the embodiment, as Figure 2 shown, the diameter of the cylindrical hole 1e is larger than the diameter of the transition connecting hole 1c and smaller than the diameter of the cylindrical stepped hole 1b. The aperture of the cylindrical hole 1e of the present utility model is 18 mm and is used to cooperate with the sliding bearing of the shock absorber. For the convenience of installation, as Figure 7 shown, a combined inlet 5 composed of a cylindrical surface 51 and a conical surface 52 is also formed at the port of the cylindrical hole 1e of the present utility model. The taper angle of the conical surface 52 is 15 degrees.
[0028] In the embodiment, as Figure 2 and Figure 4 shown, a tiny diameter increasing part is provided below the convex shoulder part 11 on the guide sleeve body 1 of the present utility model, and a transition inclined surface of 165 degrees is formed at the connection between the diameter increasing part and the outer circumferential surface of the guide sleeve body 1; as Figure 4 and Figure 7 shown, a combined transition surface 4 composed of an annular plane 41 and an inclined conical surface 42 is also formed between the bottom surface of the guide sleeve body 1 and the outer circumferential surface of the guide sleeve body 1 and on the limit boss 2.
[0029] The best embodiment of the present utility model has been illustrated, and various changes or modifications made by those of ordinary skill in the art will not depart from the scope of the present utility model.
Claims
1. Rear shock absorber guide sleeve for a vehicle, comprising a guide sleeve body (1) with a convex shoulder portion (11) formed at the upper end, and a central guide hole (K) formed through the guide sleeve body (1) from top to bottom; characterized in that: A limiting boss (2) with a height less than that of the convex shoulder portion (11) is formed on the lower part of the outer peripheral surface of the convex shoulder portion (11). Four limiting notches (21) opening outward are formed on the limiting boss (2) at an angular interval of 90 degrees in the circumferential direction; Four positioning notches (31) opening upward are formed on the annular table surface (3) at the top of the guide sleeve body (1) at an angular interval of 90 degrees in the circumferential direction; The limiting notches (21) and the positioning notches (31) are arranged at an angular interval of 45 degrees in the circumferential direction on the guide sleeve body (1).
2. The rear shock absorber guide sleeve of a vehicle shock absorber according to claim 1, characterized in that: The central guide hole (K) is composed of a conical concave cavity (1a), a cylindrical stepped hole (1b), a transition connecting hole (1c) and a cylindrical hole (1e) which are connected in sequence from top to bottom; And the conical concave cavity (1a), the cylindrical stepped hole (1b) and the transition connecting hole (1c) are all located in the convex shoulder portion (11) of the guide sleeve body (1).
3. The rear shock absorber guide sleeve of a vehicle shock absorber according to claim 2, characterized in that: The depth of the positioning notch (31) is less than the depth of the conical concave cavity (1a), and the two side surfaces of the positioning notch (31) are inclined surfaces with an inclination angle of 5 degrees.
4. The rear shock absorber guide sleeve of a vehicle shock absorber according to claim 3, characterized in that: The minimum diameter of the conical concave cavity (1a) is larger than the diameter of the cylindrical stepped hole (1b), the diameter of the cylindrical stepped hole (1b) is larger than the diameter of the transition connecting hole (1c), and a combined transition surface (4) composed of an annular plane (41) and an inclined conical surface (42) is formed at the connection between the cylindrical stepped hole (1b) and the bottom of the conical concave cavity (1a) and at the connection between the transition connecting hole (1c) and the stepped surface of the cylindrical stepped hole (1b). The taper angle of the inclined conical surface (42) in the combined transition surface (4) is 60 degrees.
5. The rear shock absorber guide sleeve of a vehicle shock absorber according to claim 4, characterized in that: The diameter of the cylindrical hole (1e) is larger than the diameter of the transition connecting hole (1c) and smaller than the diameter of the cylindrical stepped hole (1b); A combined guide inlet (5) composed of a cylindrical surface (51) and a conical surface (52) is formed at the port of the cylindrical hole (1e); The taper angle of the conical surface (52) is 15 degrees.
6. The rear shock absorber guide sleeve of a vehicle shock absorber according to claim 4, characterized in that: A slightly enlarged diameter portion is provided below the convex shoulder portion (11) on the guide sleeve body (1). A transition inclined surface of 165 degrees is formed at the connection between the enlarged diameter portion and the outer circumferential surface of the guide sleeve body (1); A combined transition surface (4) composed of an annular plane (41) and an inclined conical surface (42) is also formed between the bottom surface of the guide sleeve body (1) and the outer circumferential surface of the guide sleeve body (1) and on the limiting boss (2).