Automotive piston valve body insert

Abstract

The utility model discloses a kind of automobile piston valve body inserts, including insert body, insert body is by iron-based metallurgical powder material using high-pressure die casting process die casting forming a whole piece, insert body is formed with assembly concave cavity and valve stem guide hole, assembly concave cavity is formed with internal thread, three first air holes are set on the cavity bottom surface of assembly concave cavity around valve stem guide hole radially, a group of combined structure is set between two adjacent first air holes, combined structure is composed of outer peripheral combined structure and inner side combined structure;First segmentation convex rib is also formed on the cavity bottom surface of assembly concave cavity, three first air holes are segmented in the peripheral area of first segmentation convex rib, three groups of combined structure are segmented in the inner peripheral area of first segmentation convex rib.The utility model uses high-pressure die casting forming, manufacturing cost is low, production efficiency is high, and size stability is good.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive shock absorbers, and in particular to a piston valve body insert for the shock absorber of the BYD HC series vehicles, specifically an automotive piston valve body insert. Background Technology

[0002] Automotive shock absorbers are an important component of the automotive suspension system, and their main function is to reduce vehicle vibration during driving to improve ride comfort. In existing technology, the piston valve body inserts used in the shock absorbers of BYD's HC series are mostly machined. Machined piston valve body inserts are highly susceptible to changes in worker skill levels, resulting in inconsistent product dimensions, lower production efficiency, and relatively higher product costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an automotive piston valve body insert that has low manufacturing cost, high assembly accuracy, good sealing performance and stable dimensions, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: An automotive piston valve body insert includes an insert body, which is an integral part die-cast from iron-based metallurgical powder material using a high-pressure die-casting process. The top surface of the insert body extends downwards to form an assembly cavity, and the inner wall of the assembly cavity has an internal thread. A valve stem guide hole is formed downwards through the center of the bottom surface of the assembly cavity. Three first air holes are arranged at equal arcs around the valve stem guide hole on the bottom surface of the assembly cavity, and a set of combined structures is provided between each pair of adjacent first air holes. The combined structures consist of an outer peripheral combined structure and an inner combined structure located inside the outer peripheral combined structure. A first dividing rib is also formed on the bottom surface of the assembly cavity, dividing the three first air holes in the outer region of the first dividing rib and dividing the three sets of combined structures in the inner region of the first dividing rib.

[0005] To optimize the above technical solution, the following measures were also taken: The aforementioned peripheral composite structure consists of two second air holes and a first elliptical protrusion located between the two second air holes; the second air holes and the first elliptical protrusion are circumferentially spaced 20 degrees apart.

[0006] The aforementioned inner composite structure consists of two second elliptical protrusions and a circular protrusion located between the two second elliptical protrusions; the second elliptical protrusions are 30 degrees apart circumferentially from the first elliptical protrusions, and the circular protrusion is 9 degrees apart circumferentially from the first elliptical protrusion.

[0007] The aforementioned inlay body has a surface hardness layer formed by steam treatment, the depth of which is 3 to 4 μm and the hardness is >100 HB.

[0008] The bottom surface of the aforementioned insert body is formed with a second dividing rib. The second dividing rib divides the three first air holes into the inner region of the second dividing rib, and divides the second air holes in the three sets of combined structures into the outer region of the second dividing rib.

[0009] The bottom surface of the aforementioned inlay body is formed with a third segmented rib corresponding to each group of combined structures. The third segmented rib cooperates with the second segmented rib to enclose the two second pores in the corresponding combined structure within a relatively closed area.

[0010] The included angle between the two sides of the third dividing rib is 70 degrees.

[0011] The aforementioned insert body has a PTFE material coating on the outer peripheral surface of the corresponding assembly cavity, and rectangular ribs are formed on the outer peripheral surface of the coated area to improve the adhesion of the coating.

[0012] Compared with existing technologies, the insert body of this utility model is a single integral part die-cast from iron-based metallurgical powder material using a high-pressure die-casting process. The die-cast insert body from iron-based metallurgical powder material not only has low manufacturing cost and high assembly precision, but also stable molding dimensions. The insert body is formed sequentially from top to bottom with an assembly cavity and a valve stem guide hole. The inner wall of the assembly cavity has internal threads, and the bottom surface of the assembly cavity has three first vent holes. A set of combined structures is provided between each pair of adjacent first vent holes. The insert body also has a surface hardening layer formed by steam treatment, with a depth of 3 to 4 μm and a hardness >100 HB. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the structure of this utility model; Figure 3 yes Figure 2 Rear view; Figure 4 yes Figure 2 Sectional view along the BB direction. Detailed Implementation

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] Figures 1 to 4 This is a schematic diagram of the structure of this utility model.

[0016] The reference numerals in the attached drawings are as follows: insert body 1, assembly cavity 1a, valve stem guide hole 1b, first air hole 1c, first dividing rib 2, second air hole 31, first elliptical protrusion 32, second elliptical protrusion 41, circular protrusion 42, rectangular rib 5, second dividing rib 6, and third dividing rib 7.

[0017] like Figures 1 to 4 As shown, this utility model discloses an automotive piston valve body insert, which is applied in the BYD HC series vehicles. It includes an insert body 1. The insert body 1 is a single piece die-cast from iron-based metallurgical powder material using a high-pressure die-casting process. The insert body 1 is circular, and a mounting cavity 1a is formed extending downwards from its top surface along its axis. The inner wall of the mounting cavity 1a is also formed with internal threads for convenient screw-fitting. A valve stem guide hole 1b is formed penetrating downwards from the center of the bottom surface of the mounting cavity 1a. Annular bosses surrounding the valve stem guide hole 1b are formed at both ends of the valve stem guide hole 1b.

[0018] from Figure 1 and Figure 2 As can be seen from the above, three first air holes 1c are arranged at equal arcs around the valve stem guide hole 1b on the bottom surface of the assembly cavity 1a of this utility model. The three first air holes 1c are located on the outer periphery of the annular boss, and the circumferential distance between two adjacent first air holes 1c is 120 degrees. A set of combined structures is provided between each pair of adjacent first air holes 1c. The combined structure consists of an outer periphery combined structure located on the outer periphery and an inner side combined structure located inside the outer periphery combined structure. A first dividing rib 2 is also formed on the bottom surface of the assembly cavity 1a. The first dividing rib 2 divides the three first air holes 1c into the outer periphery region of the first dividing rib 2 and divides the three sets of combined structures into the inner periphery region of the first dividing rib 2. The inner periphery region is the region between the annular boss and the first dividing rib 2.

[0019] In the embodiments, as shown Figure 2 As shown, the peripheral assembly structure of this utility model consists of two second air holes 31 and a first elliptical protrusion 32 located between the two second air holes 31; the second air holes 31 and the first elliptical protrusion 32 are circumferentially spaced 20 degrees apart. The diameter of the first air hole 1c is 5.3 mm, the diameter of the second air hole 31 is 4.2 mm, and the first elliptical protrusion 32 is located in the middle position of the two adjacent first air holes 1c in the circumferential direction.

[0020] In this embodiment, the inner combined structure of the present invention consists of two second elliptical protrusions 41 and a circular protrusion 42 located between the two second elliptical protrusions 41; the second elliptical protrusions 41 are 30 degrees apart circumferentially from the first elliptical protrusions 32, and the circular protrusion 42 is 9 degrees apart circumferentially from the first elliptical protrusions 32.

[0021] In the embodiments, the inlay body 1 of the present invention has a surface hardness layer formed by steam treatment, the depth of the surface hardness layer is 3 to 4 μm, and the hardness is >100HB.

[0022] In the embodiments, as shown Figure 3 As shown, the bottom surface of the insert body 1 of this utility model is formed with a second dividing rib 6. The second dividing rib 6 divides the three first air holes 1c into the inner region of the second dividing rib 6, and divides the second air holes 31 in the three sets of combined structures into the outer region of the second dividing rib 6. The inner region here refers to the area between the annular boss on the bottom surface and the second dividing rib 6.

[0023] like Figure 3 As shown, the bottom surface of the inlay body 1 is formed with a third dividing rib 7 corresponding to each group of combined structures. The third dividing rib 7 cooperates with the second dividing rib 6 to enclose the two second air holes 31 in the corresponding combined structure in a relatively closed area.

[0024] In the embodiments, from Figure 3 As can be seen, the included angle between the two sides of the third dividing rib 7 is 70 degrees.

[0025] In the embodiments, as shown Figure 4 As shown, the insert body 1 of this utility model is covered with PTFE material on the outer peripheral surface of the corresponding assembly cavity 1a, and a rectangular rib 5 is formed on the outer peripheral surface of the covered area to improve the adhesion of the PTFE material.

[0026] The preferred embodiment of this utility model has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of this utility model.

Claims

1. An automotive piston valve body insert, comprising an insert body (1), characterized in that: The insert body (1) is an integral part formed by high-pressure die casting of iron-based metallurgical powder material. The top surface of the insert body (1) extends downwards to form an assembly cavity (1a). Internal threads are formed on the inner wall of the assembly cavity (1a). A valve stem guide hole (1b) is formed downwards through the center of the bottom surface of the assembly cavity (1a). Three first air holes (1c) are arranged at equal arcs around the valve stem guide hole (1b) on the bottom surface of the assembly cavity (1a), and two... Each adjacent first air hole (1c) is provided with a set of combined structures, which consists of an outer periphery combined structure located on the outer periphery and an inner side combined structure located inside the outer periphery combined structure; the bottom surface of the assembly cavity (1a) is also formed with a first dividing rib (2), which divides the three first air holes (1c) into the outer periphery of the first dividing rib (2) and divides the three sets of combined structures into the inner periphery of the first dividing rib (2).

2. The automotive piston valve body insert according to claim 1, characterized in that: The peripheral composite structure consists of two second air holes (31) and a first elliptical protrusion (32) located between the two second air holes (31); the second air holes (31) and the first elliptical protrusion (32) are circumferentially 20 degrees apart.

3. The automotive piston valve body insert according to claim 2, characterized in that: The inner composite structure consists of two second elliptical protrusions (41) and a circular protrusion (42) located between the two second elliptical protrusions (41); the second elliptical protrusions (41) are 30 degrees apart circumferentially from the first elliptical protrusion (32), and the circular protrusion (42) is 9 degrees apart circumferentially from the first elliptical protrusion (32).

4. The automotive piston valve body insert according to claim 3, characterized in that: The inlay body (1) has a surface hardness layer formed by steam treatment, the surface hardness layer having a depth of 3 to 4 μm and a hardness > 100 HB.

5. The automotive piston valve body insert according to claim 4, characterized in that: The bottom surface of the insert body (1) is formed with a second dividing rib (6). The second dividing rib (6) divides the three first air holes (1c) into the inner area of ​​the second dividing rib (6) and divides the second air holes (31) in the three sets of combined structures into the outer area of ​​the second dividing rib (6).

6. The automotive piston valve body insert according to claim 5, characterized in that: The bottom surface of the insert body (1) is formed with a third dividing rib (7) corresponding to each group of combined structures. The third dividing rib (7) cooperates with the second dividing rib (6) to enclose the two second air holes (31) in the corresponding combined structure in a relatively closed area.

7. The automotive piston valve body insert according to claim 6, characterized in that: The included angle between the two sides of the third dividing rib (7) is 70 degrees.

8. The automotive piston valve body insert according to claim 7, characterized in that: The insert body (1) is covered with PTFE material on the outer peripheral surface of the corresponding assembly cavity (1a), and rectangular ribs are formed on the outer peripheral surface of the covered area to improve the adhesion of the PTFE material.

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