Rear shock absorber bottom valve body of vehicle shock absorber
The high-pressure metal powder casting of the automobile rear bottom valve body addresses the inefficiencies of traditional mechanical processing by providing a cost-effective, dimensionally stable, and precisely assembled solution for automobile shock absorbers.
Patent Information
- Application Number
- CN202423027382.5
- 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
There are many machining processes for rear bottom-reducing valve bodies in traditional automobiles, low production efficiency, high cost and poor dimensional stability.
The integrated part design is designed with high pressure die-cast metal powder, including the valve body and support feet of specific structures, combining high density and surface treatment to ensure sealing performance and assembly accuracy.
The bottom-lower valve body is reduced by good sealing performance, high assembly accuracy, low manufacturing cost and good dimensional stability, improving production efficiency and reducing costs.
Smart Images
Figure CN223105137U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive shock absorbers, in particular to a rear shock absorber bottom valve body applied to the shock absorber of BYD EQ model, specifically a rear shock absorber bottom valve body for vehicle shock absorbers. Background Art
[0002] Automotive shock absorbers are important components installed on vehicles to reduce the vibration of the vehicle frame. The rear shock absorber bottom valve body of a vehicle is a component applied to automotive shock absorbers. Traditional rear shock absorber bottom valve bodies of vehicles are mostly formed by machining. The machining process is numerous, the production efficiency is low, the processing cost is high, and the dimensional stability is relatively poor. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a rear shock absorber bottom valve body for vehicle shock absorbers with good sealing performance, high assembly accuracy, low manufacturing cost, and stable dimensions in view of the above-mentioned prior art status.
[0004] The technical solution adopted by the utility model to solve the above technical problem is as follows:
[0005] A rear shock absorber bottom valve body for vehicle shock absorbers includes a valve body main body formed with a central through hole. Six support feet are formed equiangularly around the bottom surface of the valve body main body; on the top surface of the valve body main body, a top surface inner peripheral annular concave cavity located inside the circumference and a top surface outer peripheral annular concave cavity located outside the top surface inner peripheral annular concave cavity are respectively formed around the central through hole; eight oil drain holes are formed through the top surface inner peripheral annular concave cavity at an angular interval of 45 degrees in the circumferential direction, six arc-shaped slot holes are formed through the top surface outer peripheral annular concave cavity at an angular interval of 60 degrees in the circumferential direction, and an isosceles trapezoidal convex ring with an included angle of 60 degrees is provided between two adjacent arc-shaped slot holes; a top annular table surface and an annular notch are sequentially arranged on the outer circumference of the outer peripheral annular concave cavity.
[0006] To optimize the above technical solution, the following measures are also included:
[0007] A bottom surface inner peripheral annular concave cavity and a bottom surface outer peripheral annular concave cavity are respectively formed on the bottom surface of the above valve body main body; the bottom surface inner peripheral annular concave cavity corresponds to the top surface inner peripheral annular concave cavity, and the bottom surface outer peripheral annular concave cavity corresponds to the top surface outer peripheral annular concave cavity.
[0008] Both the small circle side wall and the large circle side wall of the above bottom surface inner peripheral annular concave cavity are 30-degree inclined side walls with a 30-degree inclination angle.
[0009] The small circle side wall of the above top surface inner peripheral annular concave cavity is a 30-degree inclined side wall with a 30-degree inclination angle, and the large circle side wall of the above top surface inner peripheral annular concave cavity is a 45-degree inclined side wall with a 45-degree inclination angle.
[0010] The small circular side wall and the large circular side wall of the above-mentioned top surface peripheral annular cavity are both 20-degree inclined side walls with a 20-degree inclination angle.
[0011] The above-mentioned annular notch has an annular notch positioning table surface and a notch annular side wall perpendicular to the notch positioning table surface.
[0012] A combined transition surface composed of a transition arc surface, a cylindrical surface, and a 10-degree conical surface is formed at the connection between the above-mentioned top annular table surface and the notch annular side wall.
[0013] A 135-degree chamfered inclined surface is formed between the above-mentioned top annular table surface and the top surface of the valve body body.
[0014] The bottom surface of the above-mentioned support foot is provided with a bottom foot inclined surface inclined at 30 degrees.
[0015] Combined guide hole surfaces composed of an annular bottom surface and a conical inclined surface are formed at both ends of the port of the above-mentioned central through hole.
[0016] Compared with the prior art, the valve body body of the present utility model is an integral part formed by high-pressure die-casting of metal powder. The valve body body formed by die-casting of metal powder has stable dimensions, low manufacturing cost, and high matching precision. An inner peripheral annular cavity and an outer peripheral annular cavity are respectively formed on the top surface of the valve body body around the central through hole. Eight oil drain holes are formed in the inner peripheral annular cavity of the top surface, six arc-shaped slot holes are formed in the outer peripheral annular cavity of the top surface, and an isosceles trapezoidal convex ring is further provided between two adjacent arc-shaped slot holes; a top annular table surface and an annular notch are sequentially arranged on the outer periphery of the outer peripheral annular cavity. The product density of the present utility model is ≥6.4 g / cm 3 , surface steam treatment, hardness is HRB60 - 95. Description of the Drawings
[0017] Figure 1 is the front view structure diagram of the present utility model;
[0018] Figure 2 is Figure 1 the rear view of
[0019] Figure 3 is Figure 1 the sectional structure diagram in the A - A direction of
[0020] Figure 4 is Figure 3 the partial enlarged schematic diagram at I in
[0021] Figure 5 is Figure 4 the partial enlarged schematic diagram at II in
[0022] Figure 6 is Figure 2 the partial enlarged schematic diagram at III in Detailed implementation mode
[0023] The following further describes the embodiments of the present utility model in detail with reference to the accompanying drawings.
[0024] Figures 1 to 6 It is a structural schematic diagram of the present utility model.
[0025] The reference numerals therein are: 20-degree inclined side wall a, 30-degree inclined side wall b, 45-degree inclined side wall c, annular bottom surface d, conical inclined surface e, valve body main body 1, central through hole 1a, support feet 11, bottom foot inclined surface 11a, inner peripheral annular cavity 12 on the bottom surface, outer peripheral annular cavity 13 on the bottom surface, inner peripheral annular cavity 2 on the top surface, oil drain hole 2a, outer peripheral annular cavity 3 on the top surface, arc-shaped slot hole 3a, isosceles trapezoidal convex ring 4, top annular table surface 5, chamfered inclined surface 51, annular notch 6, transition arc surface 6a, cylindrical surface 6b, 10-degree conical surface 6c, notch positioning table surface 61, notch annular side wall 62.
[0026] As Figures 1 to 6 shown, the present utility model discloses a rear shock absorber bottom valve body for a vehicle. The rear shock absorber bottom valve body is an integral part integrally die-cast by using high-pressure die-casting process with metal powder. It includes a valve body main body 1 formed with a central through hole 1a having a diameter of 5 mm. Six support feet 11 are formed equiangularly around the bottom surface periphery of the valve body main body 1. The circumferential distance between two support feet 11 is 60 degrees, and from Figure 2 it can be seen that the support feet 11 are in an arc shape with a central angle of 25 degrees.
[0027] From Figure 1 and Figure 3 it can be clearly seen that two annular cavities are respectively formed around the central through hole 1a on the top surface of the valve body main body 1 of the present utility model. The two annular cavities include a top surface inner peripheral annular cavity 2 with a depth of 0.8 mm located at the inner periphery and a top surface outer peripheral annular cavity 3 with a depth of 0.5 mm located outside the top surface inner peripheral annular cavity 2. Among them: eight oil drain holes 2a are formed equiangularly in the top surface inner peripheral annular cavity 2. The circumferential distance between two adjacent oil drain holes 2a is 45 degrees, and the oil drain holes 2a are through holes with a diameter of 0.8 mm. Six arc-shaped slot holes 3a are formed equiangularly in the top surface outer peripheral annular cavity 3. The arc-shaped slot holes 3a are also through holes. The circumferential distance between two adjacent arc-shaped slot holes 3a is 60 degrees, and as Figure 4 shown, an isosceles trapezoidal convex ring 4 with an included angle of 60 degrees is provided between two adjacent arc-shaped slot holes 3a. A top annular table surface 5 and an annular notch 6 are sequentially arranged on the outer periphery of the outer peripheral annular cavity 3 on the valve body main body 1 of the present utility model.
[0028] As Figure 3As shown, the annular notch 6 of the present utility model has an annular notch positioning table surface 61 and a notch annular side wall 62 perpendicular to the notch positioning table surface 61. The notch positioning table surface 61 is used for limiting and cooperating with other components after installation.
[0029] To ensure the smoothness of assembly and avoid stress concentration, as Figure 5 shown, a combined transition surface with a special structure is formed between the notch annular side wall 62 of the present utility model and the top annular table surface 5. The combined transition surface is successively composed of a transition arc surface 6a, a cylindrical surface 6b, and a 10-degree conical surface 6c.
[0030] In the embodiment, as Figure 2 and Figure 3 shown, an inner peripheral annular concave cavity 12 and an outer peripheral annular concave cavity 13 are respectively formed on the bottom surface of the valve body body 1 of the present utility model. Among them: the inner peripheral annular concave cavity 12 on the bottom surface corresponds to the inner peripheral annular concave cavity 2 on the top surface up and down, and the outer peripheral annular concave cavity 13 on the bottom surface corresponds to the outer peripheral annular concave cavity 3 on the top surface up and down.
[0031] As Figure 3 and Figure 4 shown, the inner peripheral annular concave cavity 12 on the bottom surface of the present utility model has a relatively small-diameter small circular side wall and a relatively large-diameter large circular side wall, and both its small circular side wall and large circular side wall are 30-degree inclined side walls b with a 30-degree inclination angle.
[0032] In the embodiment, please continue to refer to Figure 3 and Figure 4 , the inner peripheral annular concave cavity 2 on the top surface of the present utility model also has a relatively small-diameter small circular side wall and a relatively large-diameter large circular side wall. However, the difference is that the small circular side wall of the inner peripheral annular concave cavity 2 on the top surface is a 30-degree inclined side wall b with a 30-degree inclination angle, and the large circular side wall of the inner peripheral annular concave cavity 2 on the top surface is a 45-degree inclined side wall c with a 45-degree inclination angle.
[0033] In the embodiment, both the small circular side wall and the large circular side wall of the outer peripheral annular concave cavity 3 on the top surface of the present utility model are 20-degree inclined side walls a with a 20-degree inclination angle.
[0034] In the embodiment, as Figure 4 shown, a 135-degree chamfered inclined surface 51 is formed between the top annular table surface 5 of the present utility model and the top surface of the valve body body 1. The small circular side wall of the outer peripheral annular concave cavity 13 on the bottom surface also has a 135-degree inclined surface.
[0035] In the embodiment, as Figure 4 shown, the bottom surface of the support foot 11 is provided with a bottom foot inclined surface 11a inclined at 30 degrees.
[0036] In the embodiment, as Figure 6As shown, a combined guide hole surface composed of an annular bottom surface d and a conical inclined surface e is formed at each port at both ends of the central through hole 1a of the present utility model.
[0037] For the present utility model, the height difference of the foot planes of the six support feet 11 of the valve body 1 is required to be less than 0.03 mm, the axial crushing strength of the valve body 1 is greater than 39 KN, and the radial crushing strength is greater than 4.4 KN. The surface of the valve body 1 is steam-treated with a hardness of HRB60 - 95. The maximum diameter of the rear bottom valve body is 34 mm, and the total thickness is 11 mm, where the depth of the annular notch 6 is 3.4 mm.
[0038] 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. The rear shock absorber bottom valve body of a vehicle shock absorber, comprising a valve body main body (1) formed with a central through hole (1a), and six support feet (11) are formed at equal arcs around the bottom surface periphery of the valve body main body (1); characterized in that: On the top surface of the valve body main body (1), an inner circumferential top surface inner circumferential annular cavity (2) and an outer circumferential top surface outer circumferential annular cavity (3) located outside the top surface inner circumferential annular cavity (2) are respectively formed around the central through hole (1a); eight oil drain holes (2a) are formed through the inner circumferential top surface inner circumferential annular cavity (2) at a circumferential interval of 45 degrees, six arc-shaped slot holes (3a) are formed through the outer circumferential top surface outer circumferential annular cavity (3) at a circumferential interval of 60 degrees, and an isosceles trapezoidal convex ring (4) with an included angle of 60 degrees is provided between two adjacent arc-shaped slot holes (3a); a top annular table surface (5) and an annular notch (6) are sequentially arranged on the outer circumference of the outer circumferential annular cavity (3).
2. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 1, characterized in that: On the bottom surface of the valve body main body (1), a bottom surface inner circumferential annular cavity (12) and a bottom surface outer circumferential annular cavity (13) are respectively formed; the bottom surface inner circumferential annular cavity (12) corresponds to the top surface inner circumferential annular cavity (2), and the bottom surface outer circumferential annular cavity (13) corresponds to the top surface outer circumferential annular cavity (3).
3. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 2, characterized in that: Both the small circle side wall and the large circle side wall of the bottom surface inner circumferential annular cavity (12) are 30-degree inclined side walls (b) with a 30-degree inclination angle.
4. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 3, characterized in that: The small circle side wall of the top surface inner circumferential annular cavity (2) is a 30-degree inclined side wall (b) with a 30-degree inclination angle, and the large circle side wall of the top surface inner circumferential annular cavity (2) is a 45-degree inclined side wall (c) with a 45-degree inclination angle.
5. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 4, characterized in that: Both the small circle side wall and the large circle side wall of the top surface outer circumferential annular cavity (3) are 20-degree inclined side walls (a) with a 20-degree inclination angle.
6. The after-bottom valve body of a vehicle shock absorber according to claim 5, characterized in that: The annular notch (6) has an annular notch positioning table surface (61) and an annular notch side wall (62) perpendicular to the notch positioning table surface (61).
7. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 6, characterized in that: A combined transition surface composed of a transition arc surface (6a), a cylindrical surface (6b), and a 10-degree conical surface (6c) is formed between the connection of the top annular table surface (5) and the notch annular side wall (62).
8. The bottom valve body of the rear shock absorber for a vehicle according to claim 7, characterized in that: A 135-degree chamfered inclined surface (51) is formed between the top annular table surface (5) and the top surface of the valve body main body (1).
9. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 8, characterized in that: The bottom surface of the support foot (11) is provided with a bottom foot inclined surface (11a) inclined at 30 degrees.
10. The rear shock absorber bottom valve body of a vehicle shock absorber according to claim 9, characterized in that: A combined guide hole surface composed of an annular bottom surface (d) and a conical inclined surface (e) is formed at both ends of the port of the central through hole (1a).