Sealing guide sleeve assembly for push rod

Abstract

The sealing guide sleeve assembly for the push rod comprises a base and a sleeve, the base comprises a sleeve connecting part, the sleeve connecting part is provided with a cylindrical sleeve connecting part inner cavity, and when the sealing guide sleeve assembly for the push rod is used, the sleeve is inserted into the sleeve connecting part inner cavity from the upper end of the sleeve connecting part; the sleeve can slide up and down in an inner cavity of the sleeve connecting part; the sealing guide sleeve assembly for the push rod further comprises a limiting structure, and the limiting structure is used for keeping the sleeve and the sleeve connecting part relatively static. The sleeve and the base are of a split structure, the sleeve can slide up and down in an inner cavity of the sleeve connecting part of the base, the overall height of the sealing guide sleeve assembly for the push rod can be shortened when the sleeve slides downwards, and the sealing guide sleeve assembly for the push rod can be disassembled and the sealing ring can be replaced under the condition that a cylinder cover is not disassembled. The sealing guide sleeve assembly for the push rod is convenient to disassemble, and the replacement efficiency of the sealing ring is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts, in particular to a sealing guide sleeve assembly for a push rod. Background Art

[0002] In the prior art, the O-ring of the push rod sealing guide sleeve is very susceptible to corrosion and aging due to being in a high temperature and oil vapor working environment, and the O-ring needs to be replaced frequently.

[0003] Since the upper end of the sealing guide sleeve is inserted into the cylinder head hole, the sealing guide sleeve cannot be directly removed. Each time the O-ring is replaced, the cylinder head needs to be lifted first. During operation, due to the constraints of the narrow space in the cabin, the operation is difficult, time-consuming and labor-intensive. Utility Model Content

[0004] In order to overcome the above defects, the technical problem solved by the utility model is that the utility model provides a sealing guide sleeve assembly for a push rod, which facilitates the disassembly of the sealing guide sleeve assembly for the push rod and improves the replacement efficiency of the sealing ring.

[0005] In order to solve the above technical problems, the utility model provides a sealing guide sleeve assembly for a push rod, comprising a base and a sleeve, wherein the base comprises a sleeve connecting portion, and the sleeve connecting portion has a cylindrical sleeve connecting portion inner cavity. When in use, the sleeve is inserted into the sleeve connecting portion inner cavity from the upper end of the sleeve connecting portion, and the sleeve can slide up and down in the sleeve connecting portion inner cavity; the sealing guide sleeve assembly for the push rod also comprises a limiting structure, and the limiting structure is used to keep the sleeve and the sleeve connecting portion relatively still.

[0006] Furthermore, the limiting structure includes a limiting plate and a limiting groove, the limiting groove is arranged on the outer peripheral surface of the sleeve, and the limiting plate is detachably connected to the upper end surface of the sleeve connecting part; when limiting, the limiting plate is inserted into the limiting groove.

[0007] Furthermore, an outer peripheral surface of the upper part of the sleeve is provided with a sleeve upper annular groove, and a sleeve upper sealing ring is provided in the sleeve upper annular groove.

[0008] Furthermore, a sleeve lower annular groove is arranged on the outer peripheral surface of the lower part of the sleeve, and a sleeve lower sealing ring is arranged in the sleeve lower annular groove.

[0009] Furthermore, the outer peripheral surface of the sleeve is also provided with reinforcing ribs.

[0010] Furthermore, the base also includes a body connection portion, the body connection portion is located below the sleeve connection portion, and the sleeve connection portion is fixedly connected to the body connection portion.

[0011] Furthermore, the sleeve connecting portion and the body connecting portion are an integral structure.

[0012] Furthermore, a base ring groove is formed on the lower end surface of the body connecting portion, and a base sealing ring is arranged in the base ring groove.

[0013] Furthermore, an upper inclined surface of an upper ring groove is provided on the upper side of the upper ring groove of the sleeve, and the inclination angle of the upper inclined surface of the upper ring groove is α, 20°<α<30°; an upper lower inclined surface of an upper ring groove is provided on the lower side of the upper ring groove of the sleeve, and the inclination angle of the lower inclined surface of the upper ring groove is β, 20°<β<30°.

[0014] Furthermore, a lower ring groove upper inclined surface is provided on the upper side of the lower ring groove of the sleeve, and the inclination angle of the lower ring groove upper inclined surface is denoted as θ, 20°<θ<30°; a lower ring groove lower inclined surface is provided on the lower side of the lower ring groove of the sleeve, and the inclination angle of the lower ring groove lower inclined surface is denoted as γ, 20°<γ<30°.

[0015] After adopting the above technical scheme, the beneficial effect of the utility model is that the push rod sealing guide sleeve assembly includes a base and a sleeve, the base includes a sleeve connecting part, the sleeve connecting part has a cylindrical sleeve connecting part inner cavity, when in use, the sleeve is inserted into the sleeve connecting part inner cavity from the upper end of the sleeve connecting part, and the sleeve can slide up and down in the sleeve connecting part inner cavity; the push rod sealing guide sleeve assembly also includes a limiting structure, and the limiting structure is used to keep the sleeve and the sleeve connecting part relatively still. The sleeve and the base are split structures, and the sleeve can slide up and down in the sleeve connecting part inner cavity of the base. When the sleeve slides downward, the overall height of the push rod sealing guide sleeve assembly can be shortened, and the push rod sealing guide sleeve assembly can be disassembled without removing the cylinder head, and the sealing ring can be replaced, which is convenient for disassembly of the push rod sealing guide sleeve assembly and improves the replacement efficiency of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a sealing guide sleeve assembly for a push rod of the utility model;

[0017] Figure 2 It is an exploded view of the sealing guide sleeve assembly for the push rod of the utility model;

[0018] Figure 3 It is a structural schematic diagram of a sealing guide sleeve assembly for a push rod of the utility model;

[0019] Figure 4 yes Figure 3 A partial enlarged view of the middle A area;

[0020] Figure 5 yes Figure 3 Enlarged view of the middle sleeve;

[0021] Figure 6 yes Figure 5 A partial enlarged view of the middle B area;

[0022] Figure 7 yes Figure 5 A partial enlarged view of the middle C area;

[0023] In the figure, 1. sealing ring on sleeve; 2. sealing ring on sleeve; 3. base; 31. connecting part of body; 311. ring groove on base; 32. connecting part of sleeve; 321. mounting boss; 4. sleeve; 41. ring groove on sleeve; 411. upper inclined surface of upper ring groove; 412. lower inclined surface of upper ring groove; 42. lower ring groove on sleeve; 421. upper inclined surface of lower ring groove; 422. lower inclined surface of lower ring groove; 43. reinforcing rib; 44. limiting groove; 5. limiting plate; 6. bolt; 7. screw; 8. sealing ring on base. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Combination Figure 1 , Figure 2 ,as well as Figure 3 As shown together, a sealing guide sleeve assembly for a push rod includes a base 3 and a sleeve 4. The base 3 includes a sleeve connecting portion 32. The sleeve connecting portion 32 has a cylindrical sleeve connecting portion inner cavity. When in use, the sleeve 4 is inserted into the sleeve connecting portion inner cavity from the upper end of the sleeve connecting portion 32, and the sleeve 4 can slide up and down in the sleeve connecting portion inner cavity.

[0026] Preferably, the base 3 further comprises a body connection portion 31 , the body connection portion 31 is located below the sleeve connection, and the sleeve connection portion 32 is fixedly connected to the body connection portion 31 .

[0027] Further preferably, the sleeve connection portion 32 and the body connection portion 31 are an integral structure.

[0028] When in use, the machine body connecting portion 31 is fixedly connected to the machine body (not shown in the figure) by bolts 6 .

[0029] More preferably, a base ring groove 311 is formed on the lower end surface of the body connecting portion 31 , and a base sealing ring 8 is disposed in the base ring groove 311 .

[0030] Preferably, reinforcing ribs 43 are further provided on the outer circumferential surface of the sleeve 4 .

[0031] Combination Figure 3 as well as Figure 4 As shown together, the push rod sealing guide sleeve assembly also includes a limiting structure, which is used to keep the sleeve 4 and the sleeve connecting portion 32 relatively still.

[0032] Preferably, the limiting structure includes a limiting plate 5 and a limiting groove 44, the limiting groove 44 is arranged on the outer peripheral surface of the sleeve 4, and the limiting groove 44 is preferably arranged around the sleeve 4. The limiting plate 5 is detachably connected to the upper end surface of the sleeve connecting portion 32, preferably, the sleeve connecting portion 32 is provided with a mounting boss 321, the upper end surface of the mounting boss 321 is flush with the upper end surface of the sleeve connecting portion 32, and the limiting plate 5 is detachably connected to the mounting boss 321 by a screw 7.

[0033] When the limiting structure is limiting, the limiting plate 5 is inserted into the limiting groove 44 , and then the limiting plate 5 is fixedly connected to the upper end surface of the mounting boss 321 using screws 7 .

[0034] Combination Figure 3 , Figure 5 ,as well as Figure 6 As shown together, the outer circumferential surface of the upper part of the sleeve 4 is provided with a sleeve upper annular groove 41 , and the sleeve upper sealing ring 1 is arranged in the sleeve upper annular groove 41 .

[0035] Preferably, an upper annular groove upper inclined surface 411 is provided on the upper side of the sleeve upper annular groove 41, and the inclination angle of the upper annular groove upper inclined surface 411 relative to the vertical plane is recorded as α, 20°<α<30°; an upper annular groove lower inclined surface 412 is provided on the lower side of the sleeve upper annular groove 41, and the inclination angle of the upper annular groove lower inclined surface 412 relative to the vertical plane is recorded as β, 20°<β<30°.

[0036] Combination Figure 3 , Figure 5 ,as well as Figure 7 As shown together, the outer circumferential surface of the lower part of the sleeve 4 is provided with a sleeve lower annular groove 42 , and the sleeve lower sealing ring 2 is arranged in the sleeve lower annular groove 42 .

[0037] Preferably, a lower ring groove upper inclined surface 421 is provided on the upper side of the lower ring groove 42 of the sleeve, and the inclination angle of the lower ring groove upper inclined surface 421 relative to the vertical plane is recorded as θ, 20°<θ<30°; a lower ring groove lower inclined surface 422 is provided on the lower side of the lower ring groove 42 of the sleeve, and the inclination angle of the lower ring groove lower inclined surface 422 relative to the vertical plane is recorded as γ, 20°<γ<30°.

[0038] The installation and disassembly process of the sealing guide sleeve assembly for the push rod of the utility model is described in detail as follows:

[0039] When installing the push rod sealing guide sleeve assembly of the utility model, the sleeve 4 is inserted into the inner cavity of the sleeve connection part of the base 3, and then the body connection part 31 of the base 3 is fixedly connected to the body by bolts 6, then the sleeve 4 is pulled upward from the inner cavity of the sleeve connection part, and the upper end of the sleeve 4 is inserted into the corresponding cylinder head hole of the cylinder head (not shown in the figure), and finally, the limit plate 5 is inserted into the limit groove 44, and the limit plate 5 is fixedly connected to the mounting boss 321 by screws 7. Insert the push rod (not shown in the figure) into the sleeve 4.

[0040] When the sleeve upper sealing ring 1, the sleeve lower sealing ring 2, the base sealing ring 8, or other parts of the push rod sealing guide sleeve assembly need to be replaced, first remove the rocker arm (not shown in the figure) from the top of the cylinder head, pull out the push rod, then remove the screw 7, remove the limit plate 5, and then press the sleeve 4 into the inner cavity of the sleeve connecting part, take out the push rod sealing guide sleeve assembly, and replace the corresponding parts.

[0041] Compared with the traditional structure, when using the push rod sealing guide sleeve assembly of the utility model, the above-mentioned installation and disassembly process does not need to lift the cylinder cover, thus avoiding the obstruction of construction caused by the narrow operating space, reducing the operator's workload and improving the operator's work efficiency.

[0042] In addition, an upper ring groove upper inclined surface 411 is provided on the upper side of the sleeve upper ring groove 41, and the inclination angle of the upper ring groove upper inclined surface 411 relative to the vertical plane is recorded as α, 20°<α<30°; an upper ring groove lower inclined surface 412 is provided on the lower side of the sleeve upper ring groove 41, and the inclination angle of the upper ring groove lower inclined surface 412 relative to the vertical plane is recorded as β, 20°<β<30°.

[0043] A lower ring groove upper inclined surface 421 is provided on the upper side of the sleeve lower ring groove 42, and the inclination angle of the lower ring groove upper inclined surface 421 relative to the vertical plane is recorded as θ, 20°<θ<30°; a lower ring groove lower inclined surface 422 is provided on the lower side of the sleeve lower ring groove 42, and the inclination angle of the lower ring groove lower inclined surface 422 relative to the vertical plane is recorded as γ, 20°<γ<30°.

[0044] When the sleeve 4 of the above-mentioned structure is docked and installed with the cylinder head hole and the inner cavity of the sleeve connecting part, it can effectively avoid the problems of installation difficulty and poor sealing caused by the coaxiality deviation between the cylinder head hole and the inner cavity of the sleeve connecting part, reduce the difficulty of processing and installation of parts, reduce the coaxiality requirements during assembly, and enhance the sealing.

[0045] In the description of this specification, it needs to be understood that the orientation or position relationship described in terms of "upper and lower sliding", "upper end", "upper end face", "sleeve upper sealing ring", "sleeve lower sealing ring", "base", "below", "base ring groove", "sleeve upper ring groove", "upper inclined surface of upper ring groove", "upper inclined surface of upper ring groove", "lower inclined surface of upper ring groove", "lower ring groove of sleeve", "upper inclined surface of lower ring groove", "lower inclined surface of lower ring groove", "base sealing ring", "outer peripheral surface", "upper part", "lower part", "inner cavity of sleeve connecting part", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0046] The present utility model is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present utility model.

Claims

1. A sealing guide sleeve assembly for a push rod, characterized in that: The push rod sealing guide sleeve assembly comprises a base and a sleeve, wherein the base comprises a sleeve connecting portion, and the sleeve connecting portion has a cylindrical sleeve connecting portion inner cavity. When in use, the sleeve is inserted into the sleeve connecting portion inner cavity from the upper end of the sleeve connecting portion, and the sleeve can slide up and down in the sleeve connecting portion inner cavity. The push rod sealing guide sleeve assembly also comprises a limiting structure, and the limiting structure is used to keep the sleeve and the sleeve connecting portion relatively still. The limiting structure includes a limiting plate and a limiting groove, wherein the limiting groove is arranged on the outer peripheral surface of the sleeve, and the limiting plate is detachably connected to the upper end surface of the sleeve connecting portion; when limiting, the limiting plate is inserted into the limiting groove.

2. The push rod sealing guide sleeve assembly according to claim 1, characterized in that: The outer peripheral surface of the upper part of the sleeve is provided with a sleeve upper annular groove, and a sleeve upper sealing ring is provided in the sleeve upper annular groove.

3. The push rod sealing guide sleeve assembly according to claim 1, characterized in that: The outer peripheral surface of the lower part of the sleeve is provided with a sleeve lower annular groove, and a sleeve lower sealing ring is provided in the sleeve lower annular groove.

4. The push rod sealing guide sleeve assembly according to claim 1, characterized in that: The outer peripheral surface of the sleeve is also provided with reinforcing ribs.

5. The push rod sealing guide sleeve assembly according to claim 1, characterized in that: The base also includes a body connection portion, the body connection portion is located below the sleeve connection portion, and the sleeve connection portion is fixedly connected to the body connection portion.

6. The push rod sealing guide sleeve assembly according to claim 5, characterized in that: The sleeve connecting portion and the body connecting portion are an integral structure.

7. The push rod sealing guide sleeve assembly according to claim 5, characterized in that: A base ring groove is formed on the lower end surface of the body connecting portion, and a base sealing ring is arranged in the base ring groove.

8. The push rod sealing guide sleeve assembly according to claim 2, characterized in that: An upper ring groove upper inclined surface is arranged on the upper side of the sleeve upper ring groove, and the inclination angle of the upper ring groove upper inclined surface is recorded as α, 20°<α<30°; an upper ring groove lower inclined surface is arranged on the lower side of the sleeve upper ring groove, and the inclination angle of the upper ring groove lower inclined surface is recorded as β, 20°<β<30°.

9. The push rod sealing guide sleeve assembly according to claim 3, characterized in that: The upper side of the lower ring groove of the sleeve is provided with an upper inclined surface of the lower ring groove, and the inclination angle of the upper inclined surface of the lower ring groove is recorded as θ, 20°<θ<30°; the lower side of the lower ring groove of the sleeve is provided with a lower inclined surface of the lower ring groove, and the inclination angle of the lower inclined surface of the lower ring groove is recorded as γ, 20°<γ<30°.

Images