Plunger sleeve for engine

Abstract

The utility model provides a plunger sleeve for an engine, and relates to the technical field of plunger sleeves, the plunger sleeve comprises a plunger sleeve main body, the top of the plunger sleeve main body is inserted with a plunger main body, the interior of the plunger sleeve main body is provided with a buffer assembly, the buffer assembly comprises a sliding rod, the surfaces of the two sides of the sliding rod are respectively sleeved with a first spring, and a second spring is arranged in the sliding rod. Moving blocks are arranged in the two first springs, sliding holes are formed in the moving blocks, first rotating shafts are connected to the tops of the moving blocks, connecting rods are connected to the surfaces of the first rotating shafts, and second rotating shafts are connected to one ends of the connecting rods. According to the plunger sleeve, when the plunger body reciprocates in the plunger sleeve body, the first spring and the second spring can play a buffering role, and the problem that the plunger body and the plunger sleeve body directly collide to cause vibration, and consequently abrasion of the plunger sleeve body is aggravated is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger sleeves, in particular to a plunger sleeve for an engine. Background Art

[0002] The engine plunger sleeve is a key component in the engine, mainly used in mechanical transmission systems, and has the function of bearing bearings and reducing wear. According to different uses and structural forms, there are many types of engine plunger sleeves, such as automobile engine plunger sleeves, piston plunger sleeves, etc.

[0003] As disclosed in publication number CN211448869U, a diesel engine plunger sleeve includes an embolic seat, a sleeve body is installed on the top of the embolic seat, an inner cavity is provided in the embolic seat, an embolic hole is vertically penetrated on the sleeve body, a plug hole is provided on the top of the embolic seat and is connected to the inner cavity and the plug hole, a sealing ring is fixedly embedded at the bottom of the outer wall of the sleeve body, a threaded ring is fixedly connected to the bottom of the sealing ring, an external thread is provided on the outer surface of the threaded ring, an internal thread matching the external thread is provided on the inner surface of the plug hole, and a protective shell is fixedly connected to the bottom of the outer wall of the sleeve body. The beneficial effects achieved by the utility model are: the sleeve body and the embolic seat are connected by setting a threaded ring, the rubber gasket and the sealing ring can ensure the sealing performance of the connection, the structural strength is high, the failure rate of the diesel engine during use is reduced, and the positioning slot and positioning groove are added to better position the assembly to avoid inaccurate assembly.

[0004] This patent can connect the sleeve body and the plug seat by setting a threaded ring, and the rubber gasket and the sealing ring can ensure the sealing performance of the connection. However, when the existing plunger sleeve reciprocates with the plunger, the plunger sleeve will directly contact and collide with the plunger, and long-term vibration may cause increased wear of the plunger sleeve, the plunger and other components, and shorten the service life of the plunger sleeve. Therefore, we propose a new type of plunger sleeve for an engine. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when the existing plunger sleeve reciprocates with the plunger, the plunger sleeve directly contacts and collides with the plunger, and long-term vibration may cause aggravated wear of the plunger sleeve, the plunger and other components, thereby shortening the service life of the plunger sleeve.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a plunger sleeve for an engine, comprising a plunger sleeve main body, a plunger main body is inserted into the top of the plunger sleeve main body, a buffer assembly is arranged inside the plunger sleeve main body, the buffer assembly comprises a sliding rod, both side surfaces of the sliding rod are sleeved with a first spring, two groups of the first springs are arranged inside a moving block, a sliding hole is opened inside the moving block, the top of the moving block is connected to a first rotating shaft, the surface of the first rotating shaft is connected to a connecting rod, one end of the connecting rod is connected to a second rotating shaft, the tops of the two groups of the second rotating shafts are connected to a buffer plate, the front and rear ends of the inner bottom of the plunger sleeve main body are connected to a fixed block, a second spring is arranged inside the fixed block, the top of the second spring is connected to a top plate, and the top of the top plate is connected to a support column.

[0007] Furthermore, the inner surface wall of the sliding hole is in contact with the outer surface of the sliding rod, and the moving block is slidably connected to the sliding rod through the sliding hole.

[0008] Furthermore, the moving block is rotationally connected to the connecting rod via the first rotating shaft, and the top surfaces of the two groups of the second rotating shafts are fixedly connected to the bottom surface of the buffer plate.

[0009] Furthermore, an elastic structure is formed between the moving block and the first spring, and an elastic structure is formed between the top plate and the second spring through the fixed block.

[0010] Furthermore, a protective component is provided on the outer surface of the plunger sleeve body, and the protective component includes a ceramic coating.

[0011] Furthermore, the outer surface of the ceramic coating is connected to a polymer coating, and the outer surface of the polymer coating is provided with a tungsten carbide coating.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the present invention, when the plunger body reciprocates inside the plunger sleeve body, the first spring and the second spring will play a buffering role to avoid direct collision between the plunger body and the plunger sleeve body, thereby preventing vibration and aggravating the wear of the plunger sleeve body.

[0014] 2. In the present invention, the service life of the plunger sleeve body can be increased by providing a ceramic coating, a polymer coating and a tungsten carbide coating, so as to avoid the problem of corrosion of the plunger sleeve body due to long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a plunger sleeve for an engine;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of a plunger sleeve for an engine proposed by the utility model from another angle;

[0017] Figure 3 The utility model provides a schematic cross-sectional structure diagram of a plunger sleeve main body of a plunger sleeve for an engine;

[0018] Figure 4 The utility model provides a schematic diagram of a partial explosion structure of a plunger sleeve for an engine;

[0019] Figure 5 The utility model provides a schematic cross-sectional structure diagram of a fixing block of a plunger sleeve for an engine;

[0020] Figure 6 for Figure 3 Enlarged structural diagram at A in the middle.

[0021] Legend: 1. Plunger sleeve body; 2. Plunger body; 3. Buffer assembly; 301. Sliding rod; 302. First spring; 303. Moving block; 304. Sliding hole; 305. First rotating shaft; 306. Connecting rod; 307. Second rotating shaft; 308. Buffer plate; 309. Fixed block; 310. Second spring; 311. Top plate; 312. Support column; 4. Protective assembly; 401. Ceramic coating; 402. Polymer coating; 403. Tungsten carbide coating. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0024] Embodiment 1, as Figure 1 - Figure 5As shown, the utility model provides a plunger sleeve for an engine, comprising a plunger sleeve body 1, a plunger body 2 is inserted at the top of the plunger sleeve body 1, a buffer assembly 3 is arranged inside the plunger sleeve body 1, the buffer assembly 3 comprises a sliding rod 301, both sides of the sliding rod 301 are sleeved with first springs 302, two groups of first springs 302 are arranged inside a moving block 303, a sliding hole 304 is opened inside the moving block 303, a first rotating shaft 305 is connected to the top of the moving block 303, a connecting rod 306 is connected to the surface of the first rotating shaft 305, one end of the connecting rod 306 is connected to a second rotating shaft 307, a buffer plate 308 is connected to the top of the two groups of second rotating shafts 307, and the inner bottom of the plunger sleeve body 1 is provided with a first spring 302. Both ends are connected with a fixed block 309, a second spring 310 is arranged inside the fixed block 309, the top of the second spring 310 is connected with a top plate 311, the top of the top plate 311 is connected with a support column 312, the inner surface wall of the sliding hole 304 is in contact with the outer surface of the sliding rod 301, the moving block 303 is slidably connected with the sliding rod 301 through the sliding hole 304, the moving block 303 is rotatably connected with the connecting rod 306 through the first rotating shaft 305, the top surface of the two groups of second rotating shafts 307 are fixedly connected with the bottom surface of the buffer plate 308, an elastic structure is formed between the moving block 303 and the first spring 302, and an elastic structure is formed between the top plate 311 and the second spring 310 through the fixed block 309.

[0025] The effect achieved by the entire embodiment 1 is that when the plunger body 2 reciprocates inside the plunger sleeve body 1, it will contact the buffer plate 308 and squeeze the buffer plate 308. After the buffer plate 308 is squeezed, the pressure will be transmitted to the connecting rod 306 through the second rotating shaft 307, so that the connecting rod 306 can rotate with the first rotating shaft 305, and push the moving block 303 to slide on the surface of the sliding rod 301 through the sliding hole 304, and squeeze the first spring 302. At the same time, when the buffer plate 308 is squeezed, it will also drive the support column 312 to push the top plate 311 and the second spring 310 to be squeezed, so as to play a buffering role through the first spring 302 and the second spring 310, avoiding the direct collision between the plunger body 2 and the plunger sleeve body 1 to cause vibration, thereby aggravating the wear of the plunger sleeve body 1.

[0026] Embodiment 2, as Figure 1 , Figure 2 and Figure 6 As shown, the outer surface of the plunger sleeve body 1 is provided with a protective component 4, which includes a ceramic coating 401, the outer surface of the ceramic coating 401 is connected to a polymer coating 402, and the outer surface of the polymer coating 402 is provided with a tungsten carbide coating 403.

[0027] Working principle: The ceramic coating 401 has extremely high hardness and wear resistance, as well as good corrosion resistance and high temperature resistance. The polymer coating 402 has excellent corrosion resistance, wear resistance and certain elasticity, and can well adapt to the deformation and vibration of the plunger sleeve body 1 during operation. The tungsten carbide coating 403 is applied to the outer surface of the plunger sleeve body 1 by supersonic spraying technology. This coating has extremely high hardness and wear resistance, and can significantly improve the wear resistance of the plunger sleeve body 1.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A plunger sleeve for an engine, comprising a plunger sleeve body (1), characterized in that: The top of the plunger sleeve body (1) is plugged with a plunger body (2), and a buffer component (3) is arranged inside the plunger sleeve body (1); The buffer assembly (3) comprises a sliding rod (301), both side surfaces of the sliding rod (301) are sleeved with first springs (302), two groups of the first springs (302) are provided with moving blocks (303) inside, the moving blocks (303) are provided with sliding holes (304) inside, the top of the moving blocks (303) are connected with a first rotating shaft (305), the surface of the first rotating shaft (305) is connected with a connecting rod (306), one end of the connecting rod (306) is connected with a second rotating shaft (307), the tops of the two groups of the second rotating shafts (307) are connected with buffer plates (308), the front and rear ends of the inner bottom of the plunger sleeve body (1) are connected with fixed blocks (309), the fixed blocks (309) are provided with a second spring (310), the top of the second spring (310) is connected with a top plate (311), and the top of the top plate (311) is connected with a support column (312).

2. The plunger sleeve for an engine according to claim 1, characterized in that: The inner surface wall of the sliding hole (304) is in contact with the outer surface of the sliding rod (301), and the moving block (303) is slidably connected to the sliding rod (301) through the sliding hole (304).

3. The engine plunger sleeve according to claim 2, characterized in that: The moving block (303) is rotatably connected to the connecting rod (306) via the first rotating shaft (305), and the top surfaces of the two groups of the second rotating shafts (307) are fixedly connected to the bottom surface of the buffer plate (308).

4. The engine plunger sleeve according to claim 3, characterized in that: An elastic structure is formed between the moving block (303) and the first spring (302), and an elastic structure is formed between the top plate (311) and the second spring (310) via the fixed block (309).

5. The engine plunger sleeve according to claim 1, characterized in that: The outer surface of the plunger sleeve body (1) is provided with a protective component (4), and the protective component (4) comprises a ceramic coating (401).

6. The plunger sleeve for an engine according to claim 5, characterized in that: The outer surface of the ceramic coating (401) is connected to a polymer coating (402), and the outer surface of the polymer coating (402) is provided with a tungsten carbide coating (403).

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