Piston assembly facilitating damping adjustment

Abstract

The utility model discloses a piston assembly convenient to adjust damping, which comprises a piston body, a first valve plate component is arranged at the upper end of the piston body, a second valve plate component is arranged at the lower end of the piston body, a damping hole is axially arranged in the piston body, and the damping hole penetrates through two ends of the piston body. An adjusting valve rod is inserted in the damping hole in a floating mode in the axial direction, an annular gap is formed between the adjusting valve rod and the inner wall of the damping hole, the annular gap forms a damping channel, the two ends of the adjusting valve rod are in limiting fit with the first valve plate assembly and the second valve plate assembly respectively, and in the demolding process of the piston body, integrated forming of the damping hole is synchronously achieved. The production process flow is simplified, the universality of the piston body is high, damping is adjusted by inserting the adjusting valve rods with different diameters into the damping holes, the requirements of various products can be met, and the flexibility is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a piston assembly technical field, especially a piston assembly convenient to adjust damping. BACKGROUND

[0002] In the design of the piston assembly, the damping hole is usually designed according to actual demand, and the main function of the damping hole is to adjust damping force, and in the prior art, the demand for damping size is different for different products, so the hole diameter of the damping hole arranged on the piston assembly also has differences, when producing the piston assembly,

[0003] it is necessary to drill the damping hole with different hole diameters on the piston assembly according to the demand of different products to accurately adjust the size of damping to meet specific performance requirements, however, this design method can greatly reduce the universality of the piston assembly, because the damping hole matched with each product needs to be specially arranged on the piston assembly, and the size of the damping hole required by each product is different, this customized design not only increases the production cost, but also has low universality, limits the application range and flexibility, therefore, it is necessary to improve. SUMMARY

[0004] The utility model discloses a piston assembly convenient to adjust damping, which has simple and reasonable structure, convenient operation, and can adjust damping by inserting the adjusting valve rod with different diameters into the damping hole, and can meet the demand of various products and has high flexibility.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The utility model discloses a piston assembly convenient to adjust damping, which has simple and reasonable structure, convenient operation, and can adjust damping by inserting the adjusting valve rod with different diameters into the damping hole, and can meet the demand of various products and has high flexibility.

[0007] Further, the damping hole is provided with a plurality of damping holes, and the plurality of damping holes are uniformly arranged along the end surface of the piston body in the circumferential direction.

[0008] Further, at least one end of the adjusting valve rod extends out of the damping hole.

[0009] Further, the length of the adjusting valve rod is less than the axial distance between the first valve plate assembly and the second valve plate assembly.

[0010] Further, both ends of the adjusting valve rod are provided with a ball head.

[0011] Further, a gap is formed between the upper opening end of the damping hole and the first valve plate assembly, and a gap is formed between the lower opening end of the damping hole and the second valve plate assembly.

[0012] Further, the first valve plate assembly comprises a first valve plate and a second valve plate arranged in sequence from top to bottom, the first valve plate and the second valve plate are in abutting cooperation along the axial direction, and the first valve plate and the second valve plate are both arranged in a circular ring shape.

[0013] Further, the second valve plate assembly comprises a third valve plate, a fourth valve plate and a fifth valve plate arranged in sequence from top to bottom, the third valve plate, the fourth valve plate and the fifth valve plate are in abutting cooperation in sequence along the radial direction, and the third valve plate, the fourth valve plate and the fifth valve plate are all arranged in a circular ring shape.

[0014] The beneficial effects of the utility model are as follows: the utility model can insert adjusting valve rods with different diameters into the damping hole according to the requirements of products, change the size of the annular gap, achieve the effect of adjusting the damping, meet the damping requirements of different products, adapt to the requirements of various products, and have high flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional structure schematic view of the utility model;

[0016] Figure 2 is Figure 1 is an enlarged structure schematic view of position A in the figure;

[0017] Figure 3 is an exploded structure schematic view of the utility model;

[0018] Figure 4 is a structure schematic view of the adjusting valve rod;

[0019] Figure 5 is a structure schematic view of the utility model in which the first valve plate assembly is hidden;

[0020] Figure 6 is Figure 5 is an enlarged structure schematic view of position B in the figure.

[0021] Figures 1-6 1, piston body; 2, first valve plate assembly; 21, first valve plate; 22, second valve plate; 3, second valve plate assembly; 31, third valve plate; 32, fourth valve plate; 33, fifth valve plate; 4, damping hole; 41, adjusting valve rod; 42, annular gap. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with the drawings.

[0023] As Figures 1-6 shown, a piston assembly convenient to adjust damping, including piston body 1, the upper end of piston body 1 is provided with first valve piece assembly 2, the lower end of piston body 1 is provided with second valve piece assembly 3, refer to Figure 1 , the piston body 1 is provided with damping hole 4 along the axial direction, the damping hole 4 is through the both ends of piston body 1, the damping hole 4 is axially floatingly inserted with adjusting valve stem 41, refer to Figure 6 , the adjusting valve stem 41 and the inner wall of damping hole 4 form annular gap 42, the annular gap 42 constitutes damping passage, liquid passes through damping passage and generates damping, refer to Figure 1 , the both ends of adjusting valve stem 41 are limited to cooperate with first valve piece assembly 2 and second valve piece assembly 3 respectively, avoid adjusting valve stem 41 not to be expected to separate, influence use, in the embodiment, the damping hole 4 and piston body 1 are formed by the process of integrated molding, specifically, the damping hole 4 and piston body 1 are integrally molded by injection molding, of course, in other embodiments, damping hole 4 can also be processed by machining, specifically, the piston body 1 in the embodiment realizes the integrated molding of damping hole 4 in the process of demolding, simplifies production process flow, avoids subsequent secondary processing, also eliminates the burr or deformation defect that can be generated in traditional drilling process, the utility model can insert adjusting valve stem 41 of different diameter size into damping hole 4 according to the demand of product, change the size of annular gap 42 by this way, play the effect of adjusting damping, to meet the damping demand of different products, compared with conventional piston assembly, the piston body 1 of the utility model has high universality, in addition, adjusting damping by inserting adjusting valve stem 41 of different diameter size can adapt to the demand of multiple products, and has high flexibility.

[0024] Preferably, in the embodiment, refer to Figure 5 , the damping hole 4 is provided with several, several damping holes 4 are uniformly arranged along the end surface of piston body 1, not only make the overall appearance more harmonious and beautiful, but also ensure the uniformity and consistency of damping effect, specifically, in the embodiment, the damping hole 4 is provided with 6.

[0025] Preferably, refer to Figure 2The adjusting valve rod 41 is arranged in the damping hole 4, and at least one end of the adjusting valve rod 41 extends out of the damping hole 4, both ends of the adjusting valve rod 41 extend out of the damping hole 4 in the embodiment, preferably, the length of the adjusting valve rod 41 is less than the axial spacing between the first valve plate assembly 2 and the second valve plate assembly 3 in the embodiment, so that the adjusting valve rod 41 is not too long to interfere, and at the same time, it is ensured that the adjusting valve rod 41 is not too short, because if the adjusting valve rod 41 is too short, the adjusting valve rod 41 may be impacted to damage the first valve plate assembly 2 or the second valve plate assembly 3 due to having a large potential energy when the liquid passes through the damping hole 4 at a high speed, and the service life is affected.

[0026] Preferably, in the embodiment, referring to Figure 4 Both ends of the adjusting valve rod 41 are provided in a ball head, which can reduce the wear between the adjusting valve rod 41 and the first valve plate assembly 2 or the second valve plate assembly 3.

[0027] Preferably, in the embodiment, referring to Figure 2 Gaps are formed between the upper opening end of the damping hole 4 and the first valve plate assembly 2 and between the lower opening end of the damping hole 4 and the second valve plate assembly 3, so that the liquid can pass through.

[0028] Preferably, in the embodiment, referring to Figure 3 The first valve plate assembly 2 comprises a first valve plate 21 and a second valve plate 22 arranged in sequence from top to bottom, and the first valve plate 21 and the second valve plate 22 are in abutting cooperation in the axial direction, which can better play a sealing effect, and the first valve plate 21 and the second valve plate 22 are arranged in a circular ring shape, and specifically, the piston assembly is usually cooperated with a piston rod, and the circular ring design can well supply the piston rod to pass through.

[0029] Preferably, in the embodiment, referring to Figure 3 The second valve plate assembly 3 comprises a third valve plate 31, a fourth valve plate 32 and a fifth valve plate 33 arranged in sequence from top to bottom, and the third valve plate 31, the fourth valve plate 32 and the fifth valve plate 33 are in abutting cooperation in sequence in the radial direction, which can better play a sealing effect, and the third valve plate 31, the fourth valve plate 32 and the fifth valve plate 33 are arranged in a circular ring shape, and the circular ring design can well supply the piston rod to pass through.

[0030] The above only describes a preferred embodiment of the utility model, and equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application range are included in the utility model patent application range.

Claims

1. A piston assembly facilitating adjustment of damping, comprising a piston body (1), a first valve plate assembly (2) is provided at the upper end of the piston body (1), a second valve plate assembly (3) is provided at the lower end of the piston body (1), characterized in that: The piston body (1) is provided with a damping hole (4) in the axial direction, the damping hole (4) penetrates both ends of the piston body (1), an adjusting valve rod (41) is floatingly inserted in the damping hole (4) in the axial direction, an annular gap (42) is formed between the adjusting valve rod (41) and the inner wall of the damping hole (4), the annular gap (42) constitutes a damping channel, and both ends of the adjusting valve rod (41) are limitedly matched with the first valve plate assembly (2) and the second valve plate assembly (3) respectively.

2. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: The damping hole (4) is provided with a plurality of damping holes (4), and the plurality of damping holes (4) are uniformly arranged along the end surface of the piston body (1).

3. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: At least one end of the adjusting valve rod (41) extends out of the damping hole (4).

4. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: The length of the adjusting valve rod (41) is less than the axial spacing between the first valve plate assembly (2) and the second valve plate assembly (3).

5. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: Both ends of the adjusting valve rod (41) are provided with spherical heads.

6. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: The upper opening end of the damping hole (4) and the first valve plate assembly (2) form a gap, and the lower opening end of the damping hole (4) and the second valve plate assembly (3) form a gap.

7. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: The first valve plate assembly (2) comprises a first valve plate (21) and a second valve plate (22) arranged in sequence from top to bottom, the first valve plate (21) and the second valve plate (22) are in abutting cooperation in the axial direction, and the first valve plate (21) and the second valve plate (22) are both arranged in a circular ring shape.

8. A piston assembly for facilitating adjustment of damping according to claim 1, wherein: The second valve plate assembly (3) comprises a third valve plate (31), a fourth valve plate (32) and a fifth valve plate (33) arranged in sequence from top to bottom, the third valve plate (31), the fourth valve plate (32) and the fifth valve plate (33) are in abutting cooperation in sequence in the radial direction, and the third valve plate (31), the fourth valve plate (32) and the fifth valve plate (33) are all arranged in a circular ring shape.

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