Compressor piston

Abstract

The utility model provides a compressor piston which comprises a piston body. An annular clamping groove is formed in the outer wall of the upper portion of the piston body and used for installing a piston ring. Two protruding block parts which are in bilateral symmetry are integrally formed on the inner wall of the piston body, a pin hole which penetrates through the piston body and the two protruding block parts in the radial direction is formed in the piston body, and a pin shaft used for being connected with a compressor connecting rod is inserted into the pin hole. A counterbore communicated with the pin hole is formed in the bottom of each convex block part, a bolt is in threaded connection with the interior of each counterbore, and the upper end of each bolt abuts against the outer wall of the pin shaft so that the pin shaft can be locked in the pin hole; according to the utility model, the pin shaft can be effectively prevented from rotating relative to the piston body, namely, the phenomenon of abrasion between the pin shaft and the piston body can be avoided, so that the pin shaft can be prevented from axially displacing relative to the piston body, and the normal driving of the piston by the connecting rod can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of compressor accessories, in particular to a compressor piston. BACKGROUND

[0002] The compressor piston is an important component of the compressor, and the piston is connected with the connecting rod in the compressor during use, that is, the connecting rod in the compressor is connected with the piston through the pin shaft arranged in the connecting rod and the piston, and under normal circumstances, the pin shaft is tightly fitted with the piston, and the connecting rod is rotatably connected with the pin shaft, so that the piston can be moved up and down to compress air when the connecting rod reciprocates, but when the compressor is working, there is a certain torsion between the pin shaft and the piston, and the pin shaft and the piston will rotate during the long-term movement of the connecting rod and the piston, that is, the pin shaft and the piston will produce rotational friction, which will cause wear between the pin shaft and the piston, and further cause the pin shaft to axially displace relative to the piston, thereby affecting the normal driving of the connecting rod on the piston. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a compressor piston which can effectively avoid the rotation of the pin shaft relative to the piston body, that is, can avoid the wear between the pin shaft and the piston body, and further can avoid the axial displacement of the pin shaft relative to the piston body, thereby ensuring the normal driving of the connecting rod on the piston.

[0004] The utility model provides a kind of compressor piston, including piston body;Annular clamping groove is provided on the outer wall of piston body upper part, and annular clamping groove is used to install piston ring;Two left-right symmetrical lugs are integrally formed on the inner wall of piston body, and the pin hole that is radially through piston body and two lugs is provided on piston body, and pin hole is inserted with the pin shaft for connecting compressor connecting rod;The bottom of each lug is provided with counterbore hole communicated with pin hole, and counterbore hole is threadedly connected with bolt, and the upper end of bolt is in contact with the outer wall of pin shaft to lock pin shaft in pin hole.

[0005] The utility model passes through the above-mentioned structure, and the pin shaft is locked in pin hole by two bolts in counterbore hole, that is, the pin shaft and the piston body can be fastened, so that the pin shaft can be effectively avoided to rotate relative to the piston body during the long-term movement of the connecting rod and the piston body, that is, the wear between the pin shaft and the piston body can be avoided, and further the axial displacement of the pin shaft relative to the piston body can be avoided, so that the normal driving of the connecting rod on the piston can be ensured.

[0006] In one possible implementation, the upper end of the protrusion extends to the inner top of the piston body and is integrally connected to the piston body, while the lower end of the protrusion extends to the lower end of the piston body. By adopting this structure, the connection strength between the protrusion and the piston body can be further improved, and under the action of the protrusion, the structural strength of the piston body itself can be further improved, so as to avoid the piston body from breaking during operation.

[0007] In one possible implementation, the edge of the top of the piston body and the connection with the upper end of the protrusion are both formed with arc surfaces. By adopting this structure, the connection strength between the top of the piston body and the side wall can be further improved, as can the connection strength between the protrusion and the piston body. This can further prevent the piston body from breaking during piston operation.

[0008] In one possible implementation, a first annular chamfer surface is provided on the inner wall of the protrusion and at the edge of the pin hole. The first annular chamfer surface is used to cooperate with the outer wall of the pin and guide it so that the pin can be inserted into the pin hole. With this structure, when the pin is assembled with the pin hole, the first annular chamfer surface can cooperate with the outer wall of the pin and guide it so that the pin can be inserted into the pin hole, which can facilitate the process of assembling the pin into the pin hole.

[0009] In one possible implementation, a second annular chamfer surface is provided on the outer wall of both ends of the pin. The second annular chamfer surface is used to cooperate with the inner wall of the pin hole for guidance so that the pin can be inserted into the pin hole. With this structure, when the pin is assembled with the pin hole, the second annular chamfer surface can cooperate with the inner wall of the pin hole for guidance so that the pin can be inserted into the pin hole, which can facilitate the process of assembling the pin into the pin hole.

[0010] In one possible implementation, a third annular chamfered surface is provided on the outer wall of the upper end of the piston body. The third annular chamfered surface is used to cooperate with the inner wall of the piston mounting cavity for guidance so that the piston body can be installed in the piston mounting cavity. By adopting this structure, during the process of assembling the piston body into the piston mounting cavity, the third annular chamfered surface can cooperate with the inner wall of the piston mounting cavity for guidance so that the piston body can be installed in the piston mounting cavity, which can facilitate the assembly process of the piston body and the piston mounting cavity. Attached Figure Description

[0011] Fig. 1 This is a three-dimensional structural diagram of the assembled pin and piston body.

[0012] Fig. 2 This is a cross-sectional view of the assembled pin and piston body.

[0013] Fig. 3This is a three-dimensional structural diagram of the piston body. Detailed Implementation

[0014] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0015] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0016] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0017] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] See Figs. 1-3 As shown in the figure, this application discloses a compressor piston, including a piston body 1; an annular groove 11 is provided on the outer wall of the upper part of the piston body 1, the annular groove 11 is used to install piston rings; two symmetrical protrusions 12 are integrally formed on the inner wall of the piston body 1; a pin hole 13 is provided on the piston body 1, which radially penetrates the piston body 1 and the two protrusions 12, and a pin 2 for connecting the compressor connecting rod is inserted into the pin hole 13; a countersunk hole 14 communicating with the pin hole 13 is provided at the bottom of each protrusion 12, and a bolt 3 is threadedly connected in the countersunk hole 14, the upper end of the bolt 3 is pressed against the outer wall of the pin 2 to lock the pin 2 in the pin hole 13.

[0019] The upper end of the protrusion 12 extends to the inner top of the piston body 1 and is integrated with the piston body 1. The lower end of the protrusion 12 extends to the lower end of the piston body 1. By adopting this structure, the connection strength between the protrusion and the piston body can be further improved. Under the action of the protrusion, the structural strength of the piston body itself can be further improved to avoid the piston body from breaking during operation.

[0020] The piston body 1 has an arc surface 15 at the top edge and at the connection with the upper end of the protrusion 12. By adopting this structure, the connection strength between the top of the piston body and the side wall can be further improved, as can the connection strength between the protrusion and the piston body. This can further prevent the piston body from breaking during piston operation.

[0021] A first annular chamfered surface 16 is provided on the inner wall of the protrusion portion 12 and at the edge of the pin hole 13. The first annular chamfered surface 16 is used to cooperate with the outer wall of the pin shaft 2 for guidance so that the pin shaft 2 can be inserted into the pin hole 13. With this structure, when the pin shaft and the pin hole are assembled, the first annular chamfered surface can cooperate with the outer wall of the pin shaft for guidance so that the pin shaft can be inserted into the pin hole, which can facilitate the process of assembling the pin shaft into the pin hole.

[0022] The outer walls at both ends of the pin 2 are provided with a second annular chamfer surface 21. The second annular chamfer surface 21 is used to cooperate with the inner wall of the pin hole 13 for guidance so that the pin 2 can be inserted into the pin hole 13. With this structure, when the pin is assembled with the pin hole, the second annular chamfer surface can cooperate with the inner wall of the pin hole for guidance so that the pin can be inserted into the pin hole, which can facilitate the process of assembling the pin into the pin hole.

[0023] A third annular chamfered surface 17 is provided on the outer wall of the upper end of the piston body 1. The third annular chamfered surface 17 is used to cooperate with the inner wall of the piston mounting cavity for guidance so that the piston body 1 can be installed in the piston mounting cavity. With this structure, during the process of assembling the piston body into the piston mounting cavity, the third annular chamfered surface can cooperate with the inner wall of the piston mounting cavity for guidance so that the piston body can be installed in the piston mounting cavity, which can facilitate the assembly process of the piston body and the piston mounting cavity.

[0024] During assembly, the present invention first passes one end of the pin through the pin hole of one of the protrusions, then passes one end of the pin through the connecting hole on the compressor connecting rod, then inserts one end of the pin into the pin hole of the other protrusion, and finally tightens the bolts in the two countersunk holes to lock the pin in the pin hole.

[0025] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A compressor piston, comprising a piston body (1); an annular groove (11) is provided on the outer wall of the upper part of the piston body (1), the annular groove (11) being used to install piston rings; two symmetrical protrusions (12) are integrally formed on the inner wall of the piston body (1), and a pin hole (13) is provided on the piston body (1) radially penetrating the piston body (1) and the two protrusions (12), a pin (2) for connecting a compressor connecting rod is inserted into the pin hole (13); characterized in that: Each of the protrusions (12) has a countersunk hole (14) at its bottom that communicates with the pin hole (13). A bolt (3) is threaded into the countersunk hole (14). The upper end of the bolt (3) is pressed against the outer wall of the pin shaft (2) to lock the pin shaft (2) in the pin hole (13).

2. The compressor piston according to claim 1, characterized in that: The upper end of the protrusion (12) extends to the inner top of the piston body (1) and is integrated with the piston body (1). The lower end of the protrusion (12) extends to the lower end of the piston body (1).

3. The compressor piston according to claim 2, characterized in that: The piston body (1) has an arc surface (15) at the top edge and at the connection with the upper end of the protrusion (12).

4. The compressor piston according to any one of claims 1-3, characterized in that: A first annular chamfered surface (16) is provided on the inner wall of the protrusion (12) and at the edge of the pin hole (13). The first annular chamfered surface (16) is used to cooperate with the outer wall of the pin (2) for guidance so that the pin (2) can be inserted into the pin hole (13).

5. The compressor piston according to claim 4, characterized in that: The outer walls at both ends of the pin (2) are provided with a second annular chamfer surface (21). The second annular chamfer surface (21) is used to cooperate with the inner wall of the pin hole (13) for guidance so that the pin (2) can be inserted into the pin hole (13).

6. The compressor piston according to claim 5, characterized in that: A third annular chamfered surface (17) is provided on the outer wall of the upper end of the piston body (1). The third annular chamfered surface (17) is used to cooperate with the inner wall of the piston mounting cavity for guidance so that the piston body (1) can be installed in the piston mounting cavity.

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