Disassembling and assembling clamp for piston ring of engine

Abstract

The utility model provides an engine piston ring disassembling and assembling clamp and aims to solve the problem that a piston ring disassembling and assembling tool in the prior art needs to be knocked and installed by means of a tool due to the fact that a compressor rotates due to the shape of the compressor and the overall dimension of the compressor is irregular when the piston ring disassembling and assembling tool is installed. The device mainly comprises a piston ring hoop, a handle and a ratchet mechanism, the piston ring hoop is tightened through operation of a shear type structure of the handle, and a piston ring is tightly wrapped in a piston ring groove. The opening and closing angle of the handle is locked in a one-way mode through the ratchet mechanism, so that the posture that the hoop tightly holds the piston ring is locked, it can be guaranteed that the piston smoothly enters the air cylinder, other tools are not needed, loosening is avoided in the installation process, the piston ring is prevented from being broken, and the engine assembly quality is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of piston ring disassembly and assembly tools, and in particular to an engine piston ring disassembly and assembly clamp. Background Technology

[0002] When overhauling a car engine, the piston and connecting rod assembly is installed. Generally, a piston ring compressor is used. Before being installed into the cylinder, the piston rings must be tightly wrapped in the piston ring grooves. Due to the elasticity of the piston rings themselves, the outer diameter of the piston rings in their free state will be larger than the piston diameter and the cylinder diameter.

[0003] The existing tool for disassembling and assembling piston rings is a piston ring compressor, which is generally made of rigid sheet metal. Its drawbacks are: some piston ring compressors cannot completely surround the piston rings, and the piston ring openings change position as the compressor rotates, making it difficult for them to smoothly enter the cylinder during installation; furthermore, the piston ring compressor is a conical tubular shape, and when using a wrench to tighten the compressor, the lower part of the piston with the compressor is inserted into the cylinder, and the lower surface of the compressor does not properly engage with the upper surface of the cylinder block. Even lightly tapping the top of the piston with a wooden stick can sometimes prevent the piston from smoothly entering the cylinder, and in severe cases, can even break the piston rings, affecting the quality of engine assembly. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing an engine piston ring removal and installation fixture. By using a ratchet mechanism to lock the opening and closing angle of the handle, the clamping position of the piston ring is locked, ensuring that the piston can smoothly enter the cylinder without loosening during installation, preventing piston ring breakage, and improving engine assembly quality.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An engine piston ring removal and installation fixture includes a movable piston ring clamp, the movable end of which is connected to a handle, and the gripping connection of the handle is provided with a ratchet mechanism for self-locking.

[0007] Furthermore, the piston ring clamp includes a left clamp and a right clamp that are symmetrical to each other. The left clamp and the right clamp are fixedly connected at the same edge, and the other end is provided with a flange plate for connecting the handle.

[0008] Furthermore, quick-release pins are provided on the flange plate to enable the connection or disconnection of the piston ring clamp and the handle.

[0009] Furthermore, the handle has a scissor-like structure, including a left grip and a right grip, and a pivot is provided at the intersection of the left grip and the right grip.

[0010] Furthermore, an inner groove is formed at the center of any one of the grips of the handle, and a ratchet is provided at the center of any other grip of the handle. The ratchet is inserted obliquely into the inner groove of the other grip from the center of the corresponding grip. A pawl is also provided at the rear of the inner groove, and the pawl engages with the ratchet.

[0011] Furthermore, the grip portion of the handle is made of a flexible material.

[0012] The advantages of this utility model over the prior art are as follows:

[0013] The engine piston ring assembly and disassembly fixture provided by this utility model can effectively tighten the piston ring through the movable piston ring clamp and the handle with a self-locking ratchet mechanism. This avoids the problem of the piston ring opening changing position as the compressor rotates, which is a problem in traditional piston ring assembly. The ratchet mechanism locks the opening and closing angle of the handle in one direction to lock the clamp's gripping posture on the piston ring, ensuring that the piston can smoothly enter the cylinder, preventing piston ring breakage, and improving the quality of engine assembly. Attached Figure Description

[0014] Figure 1 This is a first-person perspective perspective view of the present invention.

[0015] Figure 2 This is a two-dimensional perspective view of the present invention.

[0016] Figure 3 This is a schematic diagram of the installation of the ratchet mechanism in this utility model.

[0017] Among them: 1. Piston ring clamp; 11. Left clamp; 12. Right clamp; 13. Flange plate; 14. Quick release pin; 2. Handle; 21. Left grip; 22. Right grip; 23. Rotary shaft; 3. Ratchet mechanism; 31. Inner groove; 32. Ratchet; 33. Pad. Detailed Implementation

[0018] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0019] This utility model provides an engine piston ring disassembly and assembly fixture, which aims to solve the problems of existing piston ring disassembly and assembly tools, such as the need to use tools to knock the piston ring during installation due to the rotation of the compressor shape and the need to use tools to knock the piston ring when it is installed due to the irregular outer dimensions of the compressor.

[0020] like Figures 1 to 3 As shown, this utility model includes a movable piston ring clamp 1, the movable end of which is connected to a handle 2, and the gripping connection of the handle 2 is provided with a ratchet mechanism 3 for self-locking.

[0021] In one embodiment of the present invention, the piston ring clamp 1 includes a left clamp 11 and a right clamp 12 that are symmetrical to each other. The left clamp 11 and the right clamp 12 are fixedly connected at the same edge, and the other end is provided with a flange plate 13 for connecting the handle 2.

[0022] In one embodiment of this utility model, quick-release pins 14 are provided on the flange plate 13 to connect or disconnect the piston ring clamp 1 and the handle 2.

[0023] In one embodiment of this utility model, the handle 2 has a scissor structure, including a left grip 21 and a right grip 22, and a pivot 23 is provided at the intersection of the left grip 21 and the right grip 22.

[0024] In one embodiment of the present invention, an inner groove 31 is provided at the center of any one of the grips of the handle 2, and a ratchet 32 ​​is provided at the center of any other grip of the handle 2. The ratchet 32 ​​is inserted obliquely into the inner groove 31 of the other grip from the center of the corresponding grip. A pawl 33 is also provided at the rear of the inner groove 31, and the pawl 33 engages with the ratchet 32.

[0025] In one embodiment of this utility model, the gripping part of the handle 2 is made of a flexible material, such as a rubber sleeve or a silicone sleeve.

[0026] The specific structure and working principle of this utility model are as follows:

[0027] Piston ring clamp 1: Piston ring clamp 1 consists of two symmetrical clamps, left clamp 11 and right clamp 12. When closed, they form a circular shape, and their dimensions are custom-made to fit the corresponding piston ring specifications, unlike the conical tubular shape of existing compressors. The left clamp 11 and right clamp 12 are fixedly connected at the same edge, and the other end is equipped with a flange plate 13 for connecting the handle 2. The flange plate 13 uses quick-release pins 14 (only the hole position is shown in the figure; the quick-release pin itself is not shown) to connect or disconnect the piston ring clamp 1 from the handle 2.

[0028] Handle 2: Handle 2 has a scissor-type structure, including a left grip 21 and a right grip 22. A pivot 23 is provided at the intersection of the left grip 21 and the right grip 22. One grip of handle 2 has an inner groove 31 in its center, and the other grip has a ratchet 32 ​​in its center. The ratchet 32 ​​is inserted obliquely into the inner groove 31 of the other grip from the center of the corresponding grip. A pawl 33 is also provided at the rear of the inner groove 31, and the pawl 33 engages with the ratchet 32. In use, the pawl 33 can lock in one direction after being engaged, and the ratchet mechanism 3 can also be released by moving the pawl 33.

[0029] Operating procedure: During use, place the piston ring clamp 1 onto the piston ring. Use the scissor mechanism of the handle 2 to tighten the piston ring clamp 1, securing the piston ring within the piston ring groove. The ratchet mechanism 3 locks the clamp's grip on the piston ring by adjusting the opening angle of the handle 2, ensuring smooth piston entry into the cylinder without the need for additional tools. This prevents loosening during installation, avoids piston ring breakage, and improves engine assembly quality.

[0030] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. An engine piston ring disassembly and assembly fixture, characterized in that: It includes a movable piston ring clamp (1), the movable end of which is connected to a handle (2), and the gripping connection of the handle (2) is provided with a ratchet mechanism (3) for self-locking.

2. The engine piston ring disassembly and assembly fixture as described in claim 1, characterized in that: The piston ring clamp (1) includes a left clamp (11) and a right clamp (12) that are symmetrical to each other. The left clamp (11) and the right clamp (12) are fixedly connected at the same edge, and the other end is provided with a flange plate (13) for connecting the handle (2).

3. The engine piston ring disassembly and assembly fixture as described in claim 2, characterized in that: The piston ring clamp (1) and the handle (2) are connected or disconnected by a quick-release pin (14) on the flange plate (13).

4. The engine piston ring disassembly and assembly fixture as described in claim 1, characterized in that: The handle (2) has a scissor structure, including a left grip (21) and a right grip (22), and a pivot (23) is provided at the intersection of the left grip (21) and the right grip (22).

5. The engine piston ring disassembly and assembly fixture as described in claim 4, characterized in that: The handle (2) has an inner groove (31) at the center of any one of the grips, and a ratchet (32) is provided at the center of any other grip of the handle (2). The ratchet (32) is inserted obliquely into the inner groove (31) of the other grip from the center of the corresponding grip. A pawl (33) is also provided at the rear of the inner groove (31), and the pawl (33) engages with the ratchet (32).

6. The engine piston ring disassembly and assembly fixture as described in claim 1, characterized in that: The grip portion of the handle (2) is made of flexible material.

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