Piston pin check ring preassembling mechanism

Abstract

The utility model relates to the field of piston pin installation, in particular to a piston pin check ring preassembly mechanism which comprises an installation barrel, a preassembly mechanism body is inserted into the top of the installation barrel, and a limiting groove is formed in the top of the preassembly mechanism body. A spring is arranged at the top end in the limiting groove, an elastic block is arranged at the top of the spring, a jacking groove is vertically formed in one end of the limiting groove, the shape of the elastic block is the same as that of the limiting groove, and connecting gaskets are horizontally arranged on the two sides of the tail end of the elastic block. According to the utility model, the pre-assembling mechanism is arranged at the top of the mounting cylinder, the top of the pre-assembling mechanism is slotted, the elastic block and the spring are extruded and contacted, and then the elastic block is pressed by the check ring, so that the connecting gasket on the side edge of the elastic block can be clamped at the position of the mounting hole on the side edge through the mounting pin; the check ring does not need to be manually expanded through external pliers, and the possibility that the check ring is damaged is reduced.

Description

Technical Field

[0001] This utility model relates to the field of piston pin installation technology, and in particular to a piston pin retaining ring pre-assembly mechanism. Background Technology

[0002] A piston pin is a cylindrical pin installed on the piston skirt. Its center passes through the connecting rod small end bore to connect the piston and connecting rod. Its function is to transmit the gas force acting on the piston to the connecting rod, or to cause the connecting rod small end to move the piston together. To reduce weight, piston pins are generally made of high-quality alloy steel and are hollow.

[0003] The main function of a piston pin retainer is to secure and protect the piston pin. A piston pin retainer is a small part that fastens the piston pin, and common structures include snap ring type and spring type. Snap ring type piston pin retainers are fixed in the piston pin by compression, while spring type piston pin retainers use elastic force to fit the ring onto the piston pin.

[0004] Piston pins generally require piston pin retainers to be installed on both sides for them to function properly. However, existing piston pin retainers are usually manually pried open with pliers before assembly, which can easily cause damage between the piston pin and the retainer. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a piston pin retaining ring pre-assembly mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A piston pin retainer ring pre-assembly mechanism includes an installation cylinder, a pre-assembly mechanism is inserted into the top of the installation cylinder, and a limit groove is formed on the top of the pre-assembly mechanism.

[0008] A spring is provided at the top of the inner end of the limiting groove, and an elastic block is provided at the top of the spring. A lifting groove is vertically opened at one end of the limiting groove, and the shape of the elastic block is the same as that of the limiting groove. Connecting pads are horizontally provided on both sides of the end of the elastic block.

[0009] Furthermore, in a preferred configuration, the connecting gasket has an installation hole, and the inner wall of the lifting groove has a limiting hole, which is compatible with the installation hole on the connecting gasket.

[0010] Furthermore, in a preferred configuration, when the spring at the bottom of the elastic block is in a fully compressed state, the horizontally arranged connecting gaskets on both sides of the elastic block and the mounting holes opened on the side of the lifting groove are on the same axis.

[0011] Furthermore, in a preferred configuration, when the connecting gaskets horizontally arranged on both sides of the elastic block are on the same axis as the mounting holes opened on the side of the lifting groove, mounting pins are inserted into the outside of the connecting gaskets.

[0012] Furthermore, in a preferred configuration, when the elastic block is placed inside the limiting groove opened at the top of the pre-assembly mechanism, the elastic block is aligned with the top of the pre-assembly mechanism via the support of the bottom spring.

[0013] Furthermore, a preferred structure is that the elastic block is annular in shape, and when it is fitted into the inside of the limiting groove, the outer side of the elastic block is in contact with the inner wall of the limiting groove.

[0014] The beneficial effects of this utility model are as follows: by setting a pre-assembly mechanism on the top of the mounting cylinder, and slotting the top of the pre-assembly mechanism, and through the squeezing contact of the elastic block and the spring, and then using the retaining ring to press the elastic block so that the connecting gasket on its side can be locked in the mounting hole on the side by the mounting pin, the retaining ring does not need to be manually expanded with external pliers, reducing the possibility of damage to the retaining ring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a piston pin retaining ring pre-assembly mechanism proposed in this utility model;

[0016] Figure 2 This is an exploded structural diagram of the pre-assembly mechanism proposed in this utility model;

[0017] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0018] Figure 4 This is a schematic diagram of the pre-assembly mechanism after it has been clamped according to this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the pre-assembly mechanism proposed in this utility model.

[0020] In the diagram: 1. Mounting cylinder; 2. Pre-assembly mechanism; 21. Limiting groove; 22. Limiting hole; 23. Lifting groove; 24. Spring; 3. Elastic block; 31. Connecting gasket; 32. Mounting hole; 4. Mounting pin. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5A piston pin retaining ring pre-assembly mechanism includes an installation cylinder 1, a pre-assembly mechanism 2 inserted into the top of the installation cylinder 1, and a limit groove 21 formed on the top of the pre-assembly mechanism 2.

[0023] A spring 24 is provided at the top of the inner end of the limiting groove 21, and an elastic block 3 is provided at the top of the spring 24. A lifting groove 23 is vertically opened at one end of the limiting groove 21, and the shape of the elastic block 3 is the same as that of the limiting groove 21. Connecting gaskets 31 are horizontally provided on both sides of the end of the elastic block 3.

[0024] The connecting gasket 31 has an installation hole 32, and the inner wall of the lifting groove 23 has a limiting hole 22, which is compatible with the installation hole 32 on the connecting gasket 31.

[0025] Furthermore, when the spring 24 at the bottom of the elastic block 3 is in a fully compressed state, the connecting pads 31 horizontally arranged on both sides of the elastic block 3 and the mounting holes 32 opened on the side of the lifting groove 23 are on the same axis.

[0026] Furthermore, when the connecting gaskets 31 horizontally arranged on both sides of the elastic block 3 are on the same axis as the mounting holes 32 opened on the side of the lifting groove 23, mounting pins 4 are inserted into the outside of the connecting gaskets 31.

[0027] Moreover, when the elastic block 3 is placed inside the limiting groove 21 opened at the top of the pre-assembly mechanism 2, the elastic block 3 is on the same axis as the top of the pre-assembly mechanism 2 by the support of the bottom spring 24.

[0028] Furthermore, the elastic block 3 is circular in shape, and when it is fitted inside the limiting groove 21, the outer side of the elastic block 3 is pressed against the inner wall of the limiting groove 21.

[0029] In this embodiment, a limiting groove 21 is first opened on the top of the pre-assembly mechanism 2, and then some springs 24 are set inside the limiting groove 21. Then, a lifting groove 23 is opened on one side of the pre-assembly mechanism 2, and a limiting hole 22 is opened on the inner side of the lifting groove 23. Then, an elastic block 3 that is slightly larger than the limiting groove 21 is inserted into the limiting groove 21.

[0030] Then, by pressing down on the horizontally arranged connecting pads 31 on both sides of the elastic block 3 with your hands, and then aligning the position of the connecting pads 31 with the limiting groove 21, the elastic block 3 is finally inserted into the limiting groove 21, and the connecting pads 31 are positioned on both sides of the lifting groove 23. Furthermore, the top of the elastic block 3 is aligned with the top of the pre-assembly mechanism 2 by the support of the spring 24.

[0031] Then, place the piston pin retainer ring to be assembled on top of the elastic block 3, and align the opening of the piston pin retainer ring with the lifting groove 23 opened on the side of the pre-assembly mechanism 2. Then press the retainer ring so that it squeezes the elastic block 3 at the bottom until the spring 24 at the bottom is fully compressed. Then, insert the mounting pin 4 into the mounting holes 32 opened on both sides of the connecting gasket 31 so that the retainer ring is pulled open, which facilitates the assembly of the piston pin and the retainer ring.

[0032] In this utility model, a pre-assembly mechanism 2 is set on the top of the mounting cylinder 1, and a groove is made on the top of the pre-assembly mechanism 2. The elastic block 3 and the spring 24 are pressed together, and then the retaining ring is used to press the elastic block 3 so that the connecting gasket 31 on its side can be locked in the position of the mounting hole 32 on the side by the mounting pin 4. This eliminates the need for the retaining ring to be manually expanded with external pliers, reducing the possibility of damage to the retaining ring.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A piston pin retaining ring pre-assembly mechanism, comprising an mounting cylinder (1), characterized in that, The top of the mounting cylinder (1) is inserted with a pre-assembly mechanism (2), and a limit groove (21) is opened on the top of the pre-assembly mechanism (2). A spring (24) is provided at the top of the inner end of the limiting groove (21), and an elastic block (3) is provided at the top of the spring (24). A lifting groove (23) is vertically opened at one end of the limiting groove (21), and the shape of the elastic block (3) is the same as that of the limiting groove (21). Connecting pads (31) are horizontally provided on both sides of the end of the elastic block (3).

2. The piston pin retaining ring pre-assembly mechanism according to claim 1, characterized in that, The connecting gasket (31) has an installation hole (32), and the inner wall of the lifting groove (23) has a limiting hole (22), and the limiting hole (22) and the installation hole (32) on the connecting gasket (31) are compatible with each other.

3. The piston pin retaining ring pre-assembly mechanism according to claim 1, characterized in that, When the spring (24) at the bottom of the elastic block (3) is in a fully compressed state, the connecting pads (31) horizontally arranged on both sides of the elastic block (3) and the mounting holes (32) opened on the side of the lifting groove (23) are on the same axis.

4. The piston pin retaining ring pre-assembly mechanism according to claim 1, characterized in that, When the connecting gaskets (31) horizontally arranged on both sides of the elastic block (3) are on the same axis as the mounting holes (32) opened on the side of the lifting groove (23), the connecting gaskets (31) are inserted with mounting pins (4).

5. A piston pin retaining ring pre-assembly mechanism according to claim 1, characterized in that, When the elastic block (3) is placed inside the limiting groove (21) opened on the top of the pre-assembly mechanism (2), the elastic block (3) is on the same axis as the top of the pre-assembly mechanism (2) by the support of the bottom spring (24).

6. The piston pin retaining ring pre-assembly mechanism according to claim 1, characterized in that, The elastic block (3) is circular in shape, and when it is fitted into the inside of the limiting groove (21), the outer side of the elastic block (3) is pressed against the inner wall of the limiting groove (21).

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