A flow passage valve stopper for a shock absorber

Abstract

The utility model discloses a kind of flow valve limit block for shock absorber, including limit block body, limit block body is by iron-based metallurgical powder material using high-pressure die casting process die casting forming a whole piece, limit block body is formed with valve stem guide hole, three radial grooves are formed with equal radian on the two end surfaces of limit block body, the radial groove on the back surface of limit block body is back radial groove, the radial groove on the front surface of limit block body is front radial groove;Every back radial groove and the front radial groove of the adjacent far radial groove are 90 degrees apart in circumference, every back radial groove and the front radial groove of the adjacent near radial groove are 30 degrees apart in circumference.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 limiting block on the flow valve of a Xichuan shock absorber, specifically a limiting block for the flow valve of a shock absorber. Background Technology

[0002] Shock absorbers are an important component of a car's suspension system. Their main function is to reduce vehicle vibration during driving to improve ride comfort.

[0003] The flow valve of the shock absorber is one of the core components of the shock absorber. It contains a limit block to restrict the movement of the valve stem. Traditionally, the limit block is mostly machined. The machined limit block is greatly affected by the skill level of the employees, so the product size is not stable and the production efficiency is low, which leads to the increase in product cost. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a flow valve limiting block for a shock absorber that has low manufacturing cost, high assembly accuracy and good dimensional stability, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A flow valve limiting block for a vibration damper includes an annular limiting block body, which is a single integral part die-cast from iron-based metallurgical powder material using a high-pressure die-casting process. A valve stem guide hole is formed through the center axis of the limiting block body. Three radial channels are formed with equal arc on both ends of the limiting block body. The radial channel formed on the back side of the limiting block body is called the back radial channel, and the radial channel formed on the front side of the limiting block body is called the front radial channel. Each back radial channel is 90 degrees circumferentially separated from its farthest adjacent front radial channel, and each back radial channel is 30 degrees circumferentially separated from its closest adjacent front radial channel.

[0006] To optimize the above technical solution, the following measures were also taken: The periphery of both ends of the aforementioned limiting block body is formed with a combined chamfered surface; the combined chamfered surface is composed of a guide slope and a guide plane connected in sequence; the angle of inclination of the guide slope is 45 degrees, and the guide plane is parallel to the end face of the limiting block body.

[0007] The aforementioned radial channel is a long strip channel with a semi-circular cross-section, and the radius of the semi-circular radial channel is 0.3 mm.

[0008] The diameter of the aforementioned limiting block body is 30 mm, and the starting point of the inner end of the radial channel is located on the circumference of the same circle, with a circle diameter of 21 mm.

[0009] An R-arc with a radius of 0.3 mm is provided between the inner end of the aforementioned radial channel and the bottom of the channel.

[0010] Compared with existing technologies, the limiting block 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 limiting block body formed by die-casting from iron-based metallurgical powder material not only has low manufacturing cost and high assembly precision, but also stable molding dimensions. The limiting block body has a valve stem guide hole, and three radial grooves are formed on both end faces of the limiting block body. The material density of the limiting block body of this utility model is ≥6.6 g / cm³. 3 The surface has a surface hardness layer formed by steam treatment, with a surface hardness ≥ HB120. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 yes Figure 2 Rear view; Figure 4 yes Figure 2 Cross-sectional view of the structure along the BB direction; Figure 5 yes Figure 2 Cross-sectional view of the structure along the FF direction; Figure 6 yes Figure 4 A magnified view of a portion of point I; Figure 7 yes Figure 4 A magnified view of a portion of point II. Detailed Implementation

[0012] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0013] Figures 1 to 7 This is a schematic diagram of the structure of this utility model.

[0014] The attached figures are labeled as follows: circle diameter φ, limit block body 1, valve stem guide hole 2, radial channel 3, back radial channel 31, front radial channel 32, combined chamfer surface 4, guide slope 41, guide plane 42, and R arc 5.

[0015] like Figures 1 to 7As shown, this utility model discloses a flow valve limiting block for a shock absorber, which can be applied to general-purpose shock absorber models. The flow valve limiting block of this utility model includes a circular limiting block body 1, which is a single integral part die-cast from iron-based metallurgical powder material using a high-pressure die-casting process. The high-pressure die-cast limiting block body 1 not only has low manufacturing cost and high production efficiency, but also very stable dimensions, thus significantly improving the assembly accuracy of the product. The limiting block body 1 has a diameter of 30 mm and a thickness of 3 mm. A valve stem guide hole 2 with a diameter of 10 mm is formed through its center axially. To improve the smoothness of product assembly, the two ends of the valve stem guide hole 2 are enlarged to form guide slopes. Three radial grooves 3 are formed with equal arcs on both ends of the limiting block body 1. For ease of understanding and description, this utility model defines the radial channel 3 formed on the back side of the limiting block body 1 as the back radial channel 31, and the radial channel 3 formed on the front side of the limiting block body 1 as the front radial channel 32. Figure 3 The radial channel 3, indicated by the dashed line, is the front radial channel 32. From... Figure 2 and Figure 3 It can be seen that the radial channels 3 on each side are 120 degrees apart circumferentially, and the radial channels 3 on both ends do not overlap circumferentially. Taking the radial channel 31 on the back side as an example, on the limiting block body 1, each radial channel 31 on the back side is 90 degrees apart circumferentially from the adjacent, more distant radial channel 32 on the front side, and each radial channel 31 on the back side is 30 degrees apart circumferentially from the adjacent, more close radial channel 32 on the front side.

[0016] In the embodiments, from Figure 4 It can be clearly seen that the periphery of both ends of the limiting block body 1 is formed with combined chamfered surfaces 4. For example... Figure 7 As shown, the combined chamfered surface 4 is composed of a guide ramp 41 and a guide plane 42 connected in sequence; the inclined angle of the guide ramp 41 is 45 degrees, and the guide plane 42 is parallel to the end face of the limiting block body 1. The width of the guide plane 42 is 0.15 mm, and the height difference between it and the end face of the limiting block body 1 is 0.3 mm.

[0017] In the embodiments, as shown Figure 5 As shown, the radial channel 3 of this utility model is an elongated channel with a semi-circular cross-section, and the radius of the circle of the semi-circular radial channel 3 is 0.3 mm. The radial channel 3 is a radially outward extending channel, and the starting point of its inner end is located on the circumference of the same circle, as shown. Figure 3 As shown, the diameter φ of the circle is 21 mm.

[0018] In the embodiments, as shown Figure 6 As shown, an R-arc 5 with a radius of 0.3 mm is provided between the inner end of the radial channel 3 and the bottom of the channel.

[0019] The limiting block body 1 of this utility model is formed by high-pressure die casting of iron-based metallurgical powder material, and its surface has a surface hardening layer formed by steam treatment. The material density of the limiting block body 1 is ≥6.6g / cm³. 3 Surface hardness ≥ HB120.

[0020] 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. A flow valve limiting block for a vibration damper, comprising an annular limiting block body (1), characterized in that: The limiting block body (1) is an integral part formed by high pressure die casting of iron-based metallurgical powder material. The limiting block body (1) has a valve stem guide hole (2) formed through the center axis. Three radial channels (3) are formed on both ends of the limiting block body (1) with equal arc. The radial channel (3) formed on the back side of the limiting block body (1) is the back radial channel (31), and the radial channel formed on the front side of the limiting block body (1) is the front radial channel (32). Each back radial channel (31) is 90 degrees away from the adjacent front radial channel (32) which is farther away, and each back radial channel (31) is 30 degrees away from the adjacent front radial channel (32) which is closer to it.

2. The flow valve limiting block for a shock absorber according to claim 1, characterized in that: The periphery of both ends of the limiting block body (1) is formed with a combined chamfered surface (4); the combined chamfered surface (4) is composed of a guide slope (41) and a guide plane (42) connected in sequence; the angle of inclination of the guide slope (41) is 45 degrees, and the guide plane (42) is parallel to the end face of the limiting block body (1).

3. A flow valve limiting block for a vibration damper according to claim 2, characterized in that: The radial channel (3) is a long channel with a semi-circular cross-section, and the radius of the circle of the semi-circular radial channel (3) is 0.3 mm.

4. A flow valve limiting block for a vibration damper according to claim 3, characterized in that: The diameter of the limiting block body (1) is 30 mm, and the starting point of the inner end of the radial channel (3) is located on the circumference of the same circle, and the diameter (φ) of the circumference is 21 mm.

5. A flow valve limiting block for a vibration damper according to claim 4, characterized in that: An R-arc (5) with a radius of 0.3 mm is provided between the inner end of the radial channel (3) and the bottom of the channel.

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