Diesel engine valve guide pipe oil seal pressing plate controlled through pressure

Abstract

The utility model relates to a diesel engine valve guide pipe oil seal pressing plate controlled through pressure, which comprises a horizontal press-fitting base plate, a plurality of transversely distributed oil seal press-fitting assemblies are arranged on the press-fitting base plate, each oil seal press-fitting assembly comprises a guide sleeve inserted on the press-fitting base plate, a lug seat is formed on the outer wall of the lower end of each guide sleeve, and the lug seat is provided with a plurality of oil seal pressing plates. The lug abuts against the lower end face of the press-fitting base plate and is fixedly connected with the press-fitting base plate through a screw, and a conical counter bore is formed in the inner wall of the upper end of the guide sleeve. A vertical press-fitting shaft is inserted into the guide sleeve, a conical limiting countersunk head is formed at the upper end of the press-fitting shaft, and the limiting countersunk head is inserted into a counter bore of the guide sleeve. The pressing plate is provided with the height-adjustable limiting column to control the feeding stroke of the pressing machine, the pressing pressure can be controlled in cooperation with the spring pressing structure with the elastic buffering function, then it can be guaranteed that the valve guide pipe oil seal is pressed in place, and meanwhile the problem of crushing cannot occur.

Description

Technical field:

[0001] The utility model relates to the technical field of oil seal installation jigs, and more specifically to a diesel engine valve guide oil seal pressing plate controlled by pressure. Background technology:

[0002] With the development of my country's engine industry, the quality requirements for diesel engines are getting higher and higher. The valve guide oil seal is to ensure that the valve guide does not leak oil, so the pressing process of the valve guide oil seal is crucial. The original pressing control of the valve guide oil seal was mainly through displacement control. The pressing depth of the valve guide oil seal was controlled to determine whether it was installed in place. However, in the later market feedback, the valve guide oil seal part would have oil leakage problems. After disassembly, it was found that the valve guide oil seal was crushed. Further analysis was: during the rapid pressing process of the valve guide oil seal, only the pressing position was controlled, but the pressing pressure was not controlled (in order to improve production efficiency, a certain pressing frequency is required, and increasing the pressing frequency is mainly based on a higher pressing pressure). Therefore, the damage of the valve guide oil seal should be caused by excessive pressure, so the pressing method using displacement control is not reliable. It is necessary to design a diesel engine valve guide oil seal pressure plate that is controlled by pressure to ensure that the valve guide oil seal is not crushed. Utility model content:

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a pressure-controlled diesel engine valve guide oil seal pressure plate, the pressure plate is provided with a height-adjustable limit column to control the press feed stroke, and a spring press-fitting structure with elastic buffering can control the press-fitting pressure, thereby ensuring that the valve guide oil seal is pressed in place without being crushed.

[0004] A pressure-controlled diesel engine valve guide oil seal pressing plate comprises a horizontal press-fitting base plate, on which a plurality of transversely distributed oil seal press-fitting assemblies are arranged, the oil seal press-fitting assemblies comprise a guide sleeve inserted on the press-fitting base plate, an ear seat is formed on the outer wall of the lower end of the guide sleeve, the ear seat abuts against the lower end surface of the press-fitting base plate and is fixedly connected to the press-fitting base plate by screws, a conical countersunk hole is formed on the inner wall of the upper end of the guide sleeve; a vertical press-fitting shaft is inserted in the guide sleeve, a conical limit countersunk head is formed on the upper end of the press-fitting shaft, and the limit countersunk head is inserted in the countersunk hole of the guide sleeve;

[0005] The lower end of the press-fitting shaft is sleeved with a press-fitting sleeve, the lower end of the press-fitting sleeve is plugged with a press-fitting head, the lower end of the press-fitting head is formed with a cylindrical guide head, the lower end of the guide head extends out of the lower end surface of the press-fitting sleeve; the lower end of the press-fitting shaft and the middle of the press-fitting head are respectively inserted with a transverse upper connecting pin and a lower connecting pin, the two ends of the upper connecting pin and the lower connecting pin are respectively plugged and fixed on the press-fitting sleeve; the upper sleeve of the press-fitting shaft is sleeved with a spring, the two ends of the spring are respectively pressed against the press-fitting sleeve and the guide sleeve;

[0006] Longitudinal support beams are fixedly connected to the lower end surfaces of the middle part and both ends of the press-fit base plate, and the two ends of the support beam extend out of the press-fit base plate to connect with the limit adjustment component. The limit adjustment component includes a vertical height adjustment column, and a stud is formed on the upper end of the height adjustment column. The stud is screwed on the support beam, and the lower end surface of the support beam is abutted against the limit nut, and the limit nuts are respectively abutted against the lower end surface of the support beam.

[0007] Preferably, the outer ring of the lower end of the guide head is formed with a rounded corner, and the inner wall of the lower end of the press-fitting sleeve is formed with an annular concave platform.

[0008] Preferably, the cross section of the spring is rectangular, an adjusting washer is inserted on the press-fit shaft between the spring and the guide sleeve, and the adjusting washer is clamped between the spring and the guide sleeve.

[0009] Preferably, limiting grooves are formed on the outer walls on both sides of the upper end of the height adjustment column, and a copper pad is fixedly connected to the lower end of the height adjustment column.

[0010] Preferably, a screw is formed at the lower end of the height adjustment column, and the copper pad is screwed and fixed on the screw of the height adjustment column.

[0011] Preferably, the oil seal press-fitting assembly is linearly and laterally evenly distributed on the press-fitting base plate, and the upper end surface of the guide sleeve and the upper end surface of the limiting countersunk head on the oil seal press-fitting assembly are not higher than the upper end surface of the press-fitting base plate.

[0012] Preferably, the lower end surface of the press-fit sleeve is located at the lower side of the lower end surface of the copper pad.

[0013] The beneficial effects of the utility model are:

[0014] The pressing plate is provided with a height-adjustable limit column to control the feed stroke of the press, and the pressing pressure can be controlled in conjunction with a spring pressing structure with elastic buffer, thereby ensuring that the valve guide oil seal is pressed into place without the problem of being crushed. Description of the drawings:

[0015] Figure 1 It is a structural schematic diagram of the utility model in a front view;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model from the side;

[0018] Figure 4 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0019] In the figure: 1. press-fit base plate; 11. socket; 2. oil seal press-fit assembly; 21. guide sleeve; 211. ear seat; 212. countersunk hole; 22. press-fit shaft; 221. limit countersunk head; 23. press-fit sleeve; 24. press-fit head; 241. guide head; 25. upper connecting pin; 26. lower connecting pin; 27. spring; 28. adjusting washer; 3. support beam; 4. limit adjustment assembly; 41. height adjustment column; 411. stud; 412. limit groove; 42. limit nut; 43. copper pad. Specific implementation method:

[0020] Example: See Figures 1 to 4 As shown, a pressure-controlled diesel engine valve guide oil seal pressing plate comprises a horizontal press-fitting base plate 1, on which a plurality of transversely distributed oil seal press-fitting assemblies 2 are arranged, the oil seal press-fitting assemblies 2 comprise a guide sleeve 21 inserted on the press-fitting base plate 1, on which a plug hole 11 opposite to the guide sleeve 21 is arranged, the upper end of the guide sleeve 21 is inserted in the plug hole 11, and an ear seat 211 is formed on the outer wall of the lower end, the ear seat 211 abuts against the lower end surface of the press-fitting base plate 1 and is fixedly connected to the press-fitting base plate 1 by screws, and a conical countersunk hole 212 is formed on the inner wall of the upper end of the guide sleeve 21; a vertical press-fitting shaft 22 is inserted in the guide sleeve 21, and a conical limit countersunk head 221 is formed on the upper end of the press-fitting shaft 22, and the limit countersunk head 221 is inserted in the countersunk hole 212 of the guide sleeve 21;

[0021] The lower end of the press-fitting shaft 22 is sleeved with a press-fitting sleeve 23, and the lower end of the press-fitting sleeve 23 is plugged with a press-fitting head 24, and the lower end of the press-fitting head 24 is formed with a cylindrical guide head 241, and the lower end of the guide head 241 extends out of the lower end surface of the press-fitting sleeve 23; the lower end of the press-fitting shaft 22 and the middle of the press-fitting head 24 are respectively inserted with a transverse upper connecting pin 25 and a lower connecting pin 26, and the two ends of the upper connecting pin 25 and the lower connecting pin 26 are respectively plugged and fixed on the press-fitting sleeve 23; the press-fitting shaft 22 is sleeved with a spring 27, and the two ends of the spring 27 are respectively pressed against the press-fitting sleeve 23 and the guide sleeve 21;

[0022] The lower end surfaces of the middle and both ends of the press-fit substrate 1 are respectively fixed with longitudinal support beams 3, and the two ends of the support beam 3 extend out of the press-fit substrate 1 to connect with the limit adjustment component 4, and the limit adjustment component 4 includes a vertical height adjustment column 41, and the upper end of the height adjustment column 41 is formed with a stud 411, and the stud 411 is screwed on the support beam 3, and the lower end surface of the support beam 3 is abutted against the limit nut 42, and the limit nuts 42 are respectively abutted against the lower end surface of the support beam 3.

[0023] The outer ring of the lower end of the guide head 241 is formed with a rounded corner, and the inner wall of the lower end of the press-fitting sleeve 23 is formed with an annular concave platform.

[0024] The cross section of the spring 27 is rectangular. An adjusting washer 28 is inserted and sleeved on the press-fit shaft 22 between the spring 27 and the guide sleeve 21 . The adjusting washer 28 is clamped between the spring 27 and the guide sleeve 21 .

[0025] Limiting grooves 412 are formed on the outer walls on both sides of the upper end of the height adjustment column 41 , and a copper pad 43 is fixedly connected to the lower end of the height adjustment column 41 .

[0026] A screw is formed at the lower end of the height adjustment column 41 , and a copper pad 43 is screwed and fixed on the screw of the height adjustment column 41 .

[0027] The oil seal press-fitting assembly 2 is evenly distributed linearly on the press-fitting base plate 1 , and the upper end surface of the guide sleeve 21 and the upper end surface of the limiting countersunk head 221 on the oil seal press-fitting assembly 2 are not higher than the upper end surface of the press-fitting base plate 1 .

[0028] The lower end surface of the press-fit sleeve 23 is located below the lower end surface of the copper pad 43 .

[0029] The press-fit substrate 1 is rectangular, and two ends of one diagonal line of the press-fit substrate 1 are respectively provided with positioning pin holes 12, and two ends of the other diagonal line are respectively provided with mounting holes 13. A positioning pin is inserted into the positioning pin hole 12, and a mounting bolt is inserted into the mounting hole 13. The press-fit substrate 1 is fixedly connected to the lower press head of the oil seal press by the positioning pin and the mounting bolt.

[0030] Working principle: The utility model is a diesel engine valve guide oil seal pressure plate controlled by pressure, and the main structure of the pressure plate is embodied in the oil seal press assembly 2 and the limit adjustment assembly 4, the oil seal press assembly 2 and the limit adjustment assembly 4 are respectively arranged on the press base plate 1, and the downward stroke of the press base plate 1 can be controlled by rotating the height adjustment column 41 on the limit adjustment assembly 4;

[0031] At the same time, by selecting adjusting washers 28 of different thicknesses, the pre-compression amount of the spring 27 can be limited. Then, when the oil seal is press-fitted, the oil seal sleeve is arranged on the guide head 241 of the press-fitting head 24 and abuts against the lower end surface of the press-fitting sleeve 23. The spring 27 will be compressed when the oil seal is installed. Based on the reaction force of the force, the force of the spring 27 is equal to the press-fitting pressure. By using an adjusting washer 28 of appropriate thickness and a press-fitting base plate 1 and selecting a suitable downward stroke, the press-fitting pressure can be controlled to avoid the oil seal being crushed due to the press-fitting.

[0032] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A pressure-controlled diesel engine valve guide oil seal pressure plate, comprising a horizontal press-fit substrate (1), on which a plurality of laterally distributed oil seal press-fit assemblies (2) are arranged, characterized in that: The oil seal press-fitting assembly (2) comprises a guide sleeve (21) inserted on a press-fitting base plate (1); an ear seat (211) is formed on the outer wall of the lower end of the guide sleeve (21); the ear seat (211) abuts against the lower end surface of the press-fitting base plate (1) and is fixedly connected to the press-fitting base plate (1) by screws; a conical countersunk hole (212) is formed on the inner wall of the upper end of the guide sleeve (21); a vertical press-fitting shaft (22) is inserted in the guide sleeve (21); a conical limiting countersunk head (221) is formed on the upper end of the press-fitting shaft (22); the limiting countersunk head (221) is inserted in the countersunk hole (212) of the guide sleeve (21); The lower end of the press-fitting shaft (22) is sleeved with a press-fitting sleeve (23), the lower end of the press-fitting sleeve (23) is plugged with a press-fitting head (24), the lower end of the press-fitting head (24) is formed with a cylindrical guide head (241), the lower end of the guide head (241) extends out of the lower end surface of the press-fitting sleeve (23); the lower end of the press-fitting shaft (22) and the middle of the press-fitting head (24) are respectively inserted with a transverse upper connecting pin (25) and a lower connecting pin (26), the two ends of the upper connecting pin (25) and the lower connecting pin (26) are respectively plugged and fixed on the press-fitting sleeve (23); the press-fitting shaft (22) is sleeved with a spring (27), the two ends of the spring (27) are respectively pressed against the press-fitting sleeve (23) and the guide sleeve (21); The lower end surfaces of the middle and both ends of the press-fit substrate (1) are respectively fixedly connected with longitudinal support beams (3), and the two ends of the support beam (3) respectively extend out of the press-fit substrate (1) to connect with a limit adjustment component (4), and the limit adjustment component (4) comprises a vertical height adjustment column (41), and a stud (411) is formed at the upper end of the height adjustment column (41), and the stud (411) is screwed on the support beam (3), and the lower end surface of the support beam (3) abuts against a limit nut (42), and the limit nut (42) respectively abuts against the lower end surface of the support beam (3).

2. A diesel engine valve guide oil seal pressure plate controlled by pressure according to claim 1, characterized in that: The outer ring of the lower end of the guide head (241) is formed with a rounded corner, and the inner wall of the lower end of the press-fitting sleeve (23) is formed with an annular concave platform.

3. The pressure-controlled diesel engine valve guide oil seal pressure plate according to claim 1, characterized in that: The cross section of the spring (27) is rectangular, and an adjusting washer (28) is inserted and sleeved on the press-fit shaft (22) between the spring (27) and the guide sleeve (21), and the adjusting washer (28) is clamped between the spring (27) and the guide sleeve (21).

4. The pressure-controlled diesel engine valve guide oil seal pressure plate according to claim 1, characterized in that: Limiting grooves (412) are formed on the outer walls on both sides of the upper end of the height adjustment column (41), and a copper pad (43) is fixedly connected to the lower end of the height adjustment column (41).

5. The pressure-controlled diesel engine valve guide oil seal pressure plate according to claim 4, characterized in that: A screw is formed at the lower end of the height adjustment column (41), and a copper pad (43) is screwed and fixed on the screw of the height adjustment column (41).

6. The pressure-controlled diesel engine valve guide oil seal pressure plate according to claim 4, characterized in that: The oil seal press-fitting assembly (2) is evenly distributed linearly and laterally on the press-fitting base plate (1); the upper end surface of the guide sleeve (21) and the upper end surface of the limiting countersunk head (221) on the oil seal press-fitting assembly (2) are not higher than the upper end surface of the press-fitting base plate (1).

7. A diesel engine valve guide oil seal pressure plate controlled by pressure according to claim 6, characterized in that: The lower end surface of the press-fitting sleeve (23) is located below the lower end surface of the copper pad (43).

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