Pin hole bushing and piston

Abstract

The pin hole bush comprises a pin hole bush body, a positioning part is further arranged on the outer side wall of the pin hole bush body, and when the pin hole bush is installed in a piston pin hole, the positioning part is arranged on the outer side wall of the pin hole bush body. According to the pin hole bushing, the part provided with the positioning part and the part not provided with the positioning part on the pin hole bushing body can realize dual positioning with the piston pin hole, so that when an engine works, the probability that the pin hole bushing slides and falls off from the piston pin hole can be reduced, and normal operation of the engine is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a pin hole bushing and a piston. Background Art

[0002] The outer shape of the piston pin hole bushing is generally designed as a cylindrical structure. The outer diameter of the pin hole bushing and the inner diameter of the piston pin hole usually adopt an interference fit fixation method. When the bushing is installed into the piston pin hole, if the piston is subjected to a large displacement force during high-temperature operation, the bushing is likely to slide off horizontally from the pin hole, resulting in piston failure and engine malfunction.

[0003] Therefore, how to provide a pin hole bushing that can reduce the probability of the pin hole bushing sliding off from the piston pin hole during engine operation and ensure the normal operation of the engine is a technical problem that those skilled in the art urgently need to solve. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a pin hole bushing that can reduce the probability of the pin hole bushing sliding off from the piston pin hole during engine operation and ensure the normal operation of the engine.

[0005] Another purpose of the utility model is also to provide a piston.

[0006] To achieve the above purposes, the utility model provides the following technical solutions:

[0007] A pin hole bushing includes a pin hole bushing body, and a positioning portion is further provided on the outer side wall of the pin hole bushing body.

[0008] Optionally, the positioning portion is a step;

[0009] There is one step, which is provided at one end of the pin hole bushing body, or there are two steps, which are respectively provided at both ends of the pin hole bushing body.

[0010] Optionally, the length of the step is 1 mm - 3 mm, and the height of the step is 0.5 mm - 1.5 mm.

[0011] Optionally, the positioning portion is a positioning groove or a positioning protrusion.

[0012] Optionally, there are multiple positioning grooves or positioning protrusions, and they are evenly arranged along the circumferential direction of the pin hole bushing body.

[0013] A piston includes a piston body, a piston pin hole and a pin hole bushing, and the pin hole bushing is the pin hole bushing described in any one of the above.

[0014] The piston pin hole is arranged on the piston body, and a fitting portion adapted to the positioning portion is provided on the inner wall of the piston pin hole.

[0015] Optionally, the positioning portion is a step, and the fitting portion is a positioning block adapted to the step.

[0016] Optionally, the length of the positioning block is 1 mm - 3 mm, and the height of the positioning block is 0.5 mm - 1.5 mm.

[0017] Optionally, the positioning portion is a positioning groove, and the fitting portion is a positioning convex block adapted to the positioning groove;

[0018] The positioning portion is a positioning protrusion, and the fitting portion is a positioning groove body adapted to the positioning protrusion.

[0019] Optionally, the piston is an aluminum piston or a steel piston.

[0020] It can be seen from the above technical solutions that the pin hole bushing disclosed in the embodiment of the present invention includes a pin hole bushing body. Among them, a positioning portion is further provided on the outer side wall of the pin hole bushing body. When the pin hole bushing is installed in the piston pin hole, the part of the pin hole bushing body provided with the positioning portion and the part not provided with the positioning portion can achieve double positioning with the piston pin hole. With such a setting, the above-mentioned pin hole bushing can achieve double positioning with the piston pin hole. Therefore, when the engine is working, the probability of the pin hole bushing sliding off from the piston pin hole can be reduced, thereby ensuring the normal operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the pin hole bushing disclosed in the embodiment of the present invention;

[0023] Figure 2 It is a schematic installation structure diagram of the pin hole bushing and the piston disclosed in the embodiment of the present invention.

[0024] Reference Numerals:

[0025] 100, pin hole bushing body; 101, positioning portion; 200, piston body; 201, piston pin hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In view of this, the core of the present utility model lies in providing a pin hole bushing, which can reduce the probability of the pin hole bushing sliding off from the piston pin hole during the operation of the engine, ensuring the normal operation of the engine.

[0027] Another object of the present utility model is to provide a piston.

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model. Please refer to Figures 1 to 2 .

[0029] Please refer to Figure 1 , the pin hole bushing disclosed in the embodiment of the present utility model includes a pin hole bushing body 100. Among them, a positioning portion 101 is further provided on the outer side wall of the pin hole bushing body 100. When the pin hole bushing is installed in the piston pin hole 201, the portion of the pin hole bushing body 100 provided with the positioning portion 101 and the portion not provided with the positioning portion 101 can achieve double positioning with the piston pin hole 201. Therefore, during the operation of the engine, the probability of the pin hole bushing sliding off from the piston pin hole 201 can be reduced, thereby ensuring the normal operation of the engine.

[0030] The embodiment of the present utility model does not limit the specific structure of the positioning portion 101, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0031] As one of the embodiments, the positioning portion 101 disclosed in the embodiment of the present utility model is a step. Among them, the step can be one or two. When the step is one, the step can be provided at any one end of the pin hole bushing body 100; when the step is two, the steps can be respectively provided at both ends of the pin hole bushing body 100. With such a setting, the pin hole bushing and the piston body 200 are fixed by a double fixing method of step positioning and interference fit or transitional fit. Through tests, this fixing method can prevent the pin hole bushing from coming out of the piston pin hole 201 during the operation of the engine, avoiding piston failure.

[0032] The embodiment of the present utility model does not limit the specific setting specifications of the step, and any specifications that meet the use requirements of the present utility model are within the protection scope of the present utility model.

[0033] As one of the embodiments, the length of the step disclosed in the embodiment of the present utility model is preferably 1 mm - 3 mm, and the height of the step is preferably 0.5 mm - 1.5 mm.

[0034] As another embodiment, the positioning portion 101 disclosed in the embodiment of the present utility model may be a positioning groove or a positioning protrusion. Among them, there are a plurality of positioning grooves or positioning protrusions, and they are evenly arranged along the circumferential direction of the pin hole bushing body 100. With such a setting, the positioning groove or the positioning protrusion forms anti-torsion with the piston pin hole 201, so as to improve the connection strength between the pin hole bushing and the piston pin hole 201 and prevent the pin hole bushing from coming out of the pin hole.

[0035] The embodiment of the present utility model also discloses a piston, which includes a piston body 200, a piston pin hole 201 and a pin hole bushing, wherein the pin hole bushing is the pin hole bushing as described in any one of the above.

[0036] Please refer to Figure 2 , the piston pin hole 201 is arranged on the piston body 200, and a matching portion for matching with the positioning portion 101 is provided on the inner wall of the piston pin hole 201. When the pin hole bushing is installed in the piston pin hole 201, the positioning portion 101 on the pin hole bushing body 100 is adapted to the matching portion provided on the inner wall of the piston pin hole 201, and the portion of the pin hole bushing body 100 where the positioning portion 101 is not provided is in interference fit or transition fit with the portion of the piston pin hole 201 where the matching portion is not provided. With such a setting, the above-mentioned pin hole bushing can be double-positioned with the piston pin hole 201. Therefore, when the engine is working, the probability of the bushing sliding off from the piston pin hole 201 can be reduced, thereby ensuring the normal operation of the engine.

[0037] It should be noted that when the positioning portion 101 is a step, the matching portion is a positioning block that matches with the step.

[0038] Among them, the length of the positioning block is 1 mm - 3 mm, and the height of the positioning block is 0.5 mm - 1.5 mm. With such a setting, the positioning portion 101 and the matching portion are just adapted to realize the positioning of the pin hole bushing.

[0039] It should be further noted that when the positioning portion 101 is a positioning groove, the matching portion is a positioning convex block that matches with the positioning groove. When the positioning portion 101 is a positioning protrusion, the matching portion is a positioning groove body that matches with the positioning protrusion. With such a setting, the pin hole bushing and the piston pin hole 201 form anti-torsion to realize the positioning of the pin hole bushing.

[0040] The embodiment of the present utility model does not limit the specific material of the piston, and any material that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0041] As one of the embodiments, the piston body 100 disclosed in the embodiment of the present utility model is an aluminum piston or a steel piston.

[0042] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0043] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference may be made to each other.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston, characterized in that: It comprises a piston body, a piston pin hole and a pin hole bushing, wherein the pin hole bushing comprises a pin hole bushing body, and the outer side wall of the pin hole bushing body is also provided with a positioning portion; The piston pin hole is arranged on the piston body, and the inner wall of the piston pin hole is provided with a matching portion for matching with the positioning portion.

2. The piston according to claim 1, characterized in that The positioning portion is a step; The step is one and is arranged at one end of the pin hole bushing body, or the step is two and is respectively arranged at two ends of the pin hole bushing body.

3. The piston according to claim 2, characterized in that The length of the step is 1 mm-3 mm, and the height of the step is 0.5 mm-1.5 mm.

4. The piston according to claim 1, characterized in that The positioning portion is a positioning groove or a positioning protrusion.

5. The piston according to claim 4, characterized in that There are multiple positioning grooves or positioning protrusions, and they are evenly arranged along the circumference of the pin hole bushing body.

6. The piston according to claim 1, characterized in that The positioning portion is a step, and the matching portion is a positioning block that matches the step.

7. The piston according to claim 6, characterized in that The length of the positioning block is 1 mm-3 mm, and the height of the positioning block is 0.5 mm-1.5 mm.

8. The piston according to claim 1, characterized in that The positioning portion is a positioning groove, and the matching portion is a positioning protrusion matched with the positioning groove; The positioning portion is a positioning protrusion, and the matching portion is a positioning groove body matched with the positioning protrusion.

9. The piston according to claim 1, characterized in that The piston body is an aluminum piston or a steel piston.

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