Compressor piston
By installing a copper bushing and spring structure on the compressor piston, the problem of pin shaft and piston wear is solved, and the replacement cost is reduced and the structural strength is improved.
Patent Information
- Application Number
- CN202420625091.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-28
AI Technical Summary
During the compressor operation, the rotational friction between the pin and the piston causes wear, which in turn bias, jump and deflection, increasing replacement costs.
Design a compressor piston, the inner wall of the piston body is equipped with left and right symmetrical bosses and pin holes, and a bushing made of copper material is embedded, and fixed by a spring and annular step. The hardness of the bushing is lower than that of the piston and pin Shaft, replaced only when the bushing is worn to reduce replacement cost.
It effectively avoids wear of the piston body and pin shaft, reduces the cost of replacement of parts, and improves the structural strength and connection strength of the piston.
Smart Images
Figure CN222162867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressor accessories, in particular to a compressor piston. Background Art
[0002] The compressor piston is an important component of the compressor. When the piston is working, it is connected to the connecting rod in the compressor, that is, the connecting rod in the compressor is connected to the piston through a pin shaft passing through the connecting rod and the piston. Under normal circumstances, the pin shaft and the piston are tightly fitted, and the connecting rod and the pin shaft are rotationally connected, so that when the connecting rod reciprocates, it can drive the piston up and down to compress the air; but when the compressor is working, due to a certain torsion between the pin shaft and the piston, in the process of the connecting rod driving the piston up and down for a long time through the pin shaft, the pin shaft and the piston will rotate, that is, rotational friction will be generated between the pin shaft and the piston, which will cause wear between the pin shaft and the piston, and then cause displacement, jumping and deflection between the pin shaft and the piston, and affect the normal drive of the connecting rod to the piston; in addition, when the pin shaft and the piston are worn, both the pin shaft and the piston need to be replaced, which has the disadvantage of high replacement cost. Utility Model Content
[0003] In view of the deficiencies in the prior art, the present invention provides a compressor piston, which can avoid wear between the piston body and the pin, thereby avoiding damage to the piston body and the pin.
[0004] The compressor piston of the present invention includes a piston body, and two left-right symmetrical bosses are provided on the inner wall of the piston body, the upper end of each boss is connected to the inner top of the piston body, and the lower end of each boss extends to the lower end of the piston body along the axial direction of the piston body; a pin hole is provided in each boss, and each pin hole extends along the radial direction of the piston body and passes through the side wall of the piston body; an annular step is provided on the inner wall at the outer end of each pin hole, and a bushing made of copper material is embedded in each pin hole, and the outer end of each bushing abuts against the annular step on the corresponding side; an annular groove is provided on the inner wall at the inner end of each pin hole, and a retaining spring is clamped on each annular groove, and each retaining spring abuts against the inner end of the bushing on the corresponding side; the inner diameter of the bushing is smaller than the inner diameter of the pin hole and smaller than the inner diameter of the retaining spring.
[0005] The utility model embeds a bushing in the pin hole. Since the bushing is made of copper material, and the piston body and the bushing are generally made of steel material, that is, the hardness of the bushing is lower than the hardness of the piston body and the hardness of the pin shaft, when the connecting rod drives the piston to move, even if the pin shaft rotates relative to the piston body, it will only cause wear of the bushing. After the bushing is worn, only the bushing needs to be replaced, which can effectively reduce the replacement cost of parts.
[0006] In the compressor piston of the present invention, the outer side wall of each bushing is tightly fitted with the inner side wall of the pin hole on the corresponding side; by adopting this structure, the bushing can be reliably assembled with the pin hole to avoid the bushing from freely rotating relative to the piston body, thereby avoiding wear of the piston body and the bushing due to the bushing rotating relative to the piston body.
[0007] The compressor piston of the present invention is provided with a first annular chamfered surface on the inner end portion of each pin hole, and the first annular chamfered surface is used to cooperate and guide with the outer side wall of the bushing end portion so as to facilitate the bushing to be inserted into the pin hole; after the first annular chamfered surface is provided on the inner end portion of each pin hole, when the bushing and the pin hole are assembled, the first annular chamfered surface can cooperate and guide with the outer side wall of the bushing end portion so as to facilitate the bushing to be inserted into the pin hole, that is, it can bring convenience to the assembly of the bushing and the pin hole.
[0008] The compressor piston of the present invention is provided with a plurality of reinforcing blocks spaced apart along the radial direction of the piston body on the inner side of the upper end of each boss, and each reinforcing block is integrally connected to the inner side wall of the boss and the inner top of the piston body; by adopting this structure, under the action of the reinforcing blocks, the connection strength between the boss and the piston body can be further improved, and the structural strength of the piston body can be further improved.
[0009] The compressor piston of the present invention is provided with a second annular chamfered surface on the outer wall of the upper end of the piston body, and the second annular chamfered surface is used to cooperate with the inner side wall of the cylinder body for guidance so that the piston body can be inserted into the cylinder body; after the second annular chamfered surface is provided on the outer wall of the upper end of the piston body, the second annular chamfered surface can cooperate with the inner side wall of the cylinder body for guidance so that the piston body can be inserted into the cylinder body, which can facilitate the assembly of the piston body and the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the assembled bushing, retaining ring and piston body;
[0012] Figure 2 for Figure 1 The schematic diagram of the structure after enlarging A in the middle;
[0013] Figure 3 It is a first three-dimensional structural diagram of the piston body;
[0014] Figure 4This is a second three-dimensional structural diagram of the piston body. DETAILED DESCRIPTION
[0015] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.
[0016] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0017] like Figure 1-4 As shown, the compressor piston of the present invention includes a piston body 1, and two bilaterally symmetrical bosses 11 are provided on the inner wall of the piston body 1. The upper end of each boss 11 is connected to the inner top of the piston body 1, and the lower end of each boss 11 extends along the axial direction of the piston body 1 to the lower end of the piston body 1; each boss 11 is provided with a pin hole 12, and each pin hole 12 extends along the radial direction of the piston body 1 and penetrates the side wall of the piston body 1; each pin An annular step 13 is provided on the inner wall at the outer end of the hole 12, and a bushing 2 made of copper material is embedded in each pin hole 12, and the outer end of each bushing 2 is in abutment against the annular step 13 on the corresponding side; an annular groove 14 is provided on the inner wall at the inner end of each pin hole 12, and a retaining spring 3 is clamped on each annular groove 14, and each retaining spring 3 is in abutment against the inner end of the bushing 2 on the corresponding side; the inner diameter of the bushing 2 is smaller than the inner diameter of the pin hole 12 and smaller than the inner diameter of the retaining spring 3.
[0018] The outer wall of each bushing 2 is tightly fitted with the inner wall of the pin hole 12 on the corresponding side; by adopting this structure, the bushing can be reliably assembled with the pin hole to avoid the bushing from rotating freely relative to the piston body, thereby avoiding wear of the piston body and the bushing due to the bushing rotating relative to the piston body.
[0019] A first annular chamfered surface 15 is provided on the inner end portion of each pin hole 12, and the first annular chamfered surface 15 is used to cooperate and guide with the outer side wall of the end portion of the bushing 2 so that the bushing 2 can be inserted into the pin hole 12; after the first annular chamfered surface is provided on the inner end portion of each pin hole, when the bushing and the pin hole are assembled, the first annular chamfered surface can cooperate and guide with the outer side wall of the end portion of the bushing so that the bushing can be inserted into the pin hole, which can facilitate the assembly of the bushing and the pin hole.
[0020] The inner side of the upper end of each boss 11 is provided with a plurality of reinforcing blocks 16 spaced apart along the radial direction of the piston body 1, and each reinforcing block 16 is integrally connected to the inner side wall of the boss 11 and the inner top of the piston body 1; by adopting this structure, under the action of the reinforcing blocks, the connection strength between the boss and the piston body can be further improved, and the structural strength of the piston body can be further improved.
[0021] A second annular chamfered surface 17 is provided on the outer wall of the upper end of the piston body 1, and the second annular chamfered surface 17 is used to cooperate and guide with the inner side wall of the cylinder body so that the piston body 1 can be inserted into the cylinder body; after the second annular chamfered surface is provided on the outer wall of the upper end of the piston body, the second annular chamfered surface can cooperate and guide with the inner side wall of the cylinder body so that the piston body can be inserted into the cylinder body, which can facilitate the assembly of the piston body and the cylinder body.
[0022] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.
Claims
1. A compressor piston, comprising a piston body (1), wherein the inner wall of the piston body (1) is provided with two bilaterally symmetrical bosses (11), the upper end of each boss (11) is integrally connected to the inner top of the piston body (1), and the lower end of each boss (11) extends along the axial direction of the piston body (1) to the lower end of the piston body (1); each boss (11) is provided with a pin hole (12), and each pin hole (12) extends along the radial direction of the piston body (1) and penetrates the side wall of the piston body (1); characterized in that: An annular step (13) is provided on the inner wall at the outer end of each pin hole (12), a bushing (2) made of copper material is embedded in each pin hole (12), and the outer end of each bushing (2) abuts against the annular step (13) on the corresponding side; an annular groove (14) is provided on the inner wall at the inner end of each pin hole (12), a retaining ring (3) is clamped on each annular groove (14), and each retaining ring (3) abuts against the inner end of the bushing (2) on the corresponding side; the inner diameter of the bushing (2) is smaller than the inner diameter of the pin hole (12) and smaller than the inner diameter of the retaining ring (3).
2. The compressor piston according to claim 1, characterized in that The outer side wall of each bushing (2) is tightly matched with the inner side wall of the pin hole (12) on the corresponding side.
3. The compressor piston according to claim 1 or 2, characterized in that: A first annular chamfered surface (15) is provided on the inner end of each pin hole (12), and the first annular chamfered surface (15) is used to cooperate with the outer side wall of the end of the bushing (2) to guide the bushing (2) to facilitate the insertion of the bushing (2) into the pin hole (12).
4. The compressor piston according to claim 1 or 2, characterized in that: A plurality of reinforcing blocks (16) are arranged on the inner side of the upper end of each boss (11) and are spaced apart in the radial direction of the piston body (1); each reinforcing block (16) is integrally connected to the inner side wall of the boss (11) and the inner top of the piston body (1).
5. The compressor piston according to claim 1 or 2, characterized in that: A second annular chamfered surface (17) is provided on the outer wall of the upper end of the piston body (1), and the second annular chamfered surface (17) is used to cooperate with the inner side wall of the cylinder body for guidance so that the piston body (1) can be inserted into the cylinder body.