CN216866847U - Bolt fixing structure for cylinder cover of natural gas engine - Google Patents

Abstract

The utility model relates to the field of bolt fixing structures, in particular to a bolt fixing structure for a cylinder cover of a natural gas engine. The bolt fixing structure for the cylinder cover of the natural gas engine comprises a cylinder cover main body shell, a mounting groove, a mounting seat, a small threaded hole and a large threaded hole, wherein the aperture of the large threaded hole is larger than that of the small threaded hole; the bolt mechanism is connected with the small threaded hole in a threaded manner and used for fixing; and the protective mechanism is used for sealing protection and is arranged on the inner wall of the large threaded hole. The bolt fixing structure for the natural gas engine cylinder cover has the advantages that the bolt is conveniently positioned by the bolt mounting mechanism and the protection mechanism, the bolt or the natural gas engine cylinder cover cannot be easily damaged in the rotation process of the bolt, and meanwhile, the mounting hole is protected from dust.

Description

Bolt fixing structure for cylinder cover of natural gas engine

Technical Field

The utility model relates to the field of bolt fixing structures, in particular to a bolt fixing structure for a cylinder head of a natural gas engine.

Background

In the installation of natural gas engine cylinder cap, can progressively install the bolt, fix natural gas engine cylinder cap, current bolt fixing mechanism, inconvenient fix a position the bolt, rotate the in-process to the bolt, can damage bolt or natural gas engine cylinder cap.

Therefore, it is necessary to provide a new bolt fixing structure for a cylinder head of a natural gas engine to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a bolt fixing structure for a cylinder head of a natural gas engine, which is convenient to position.

The utility model provides a bolt fixing structure for a cylinder head of a natural gas engine, which comprises: engine cylinder head main part 1, engine cylinder head main part 1 includes: the cylinder cover comprises a cylinder cover main body shell, a mounting groove, a mounting seat, small threaded holes and large threaded holes, wherein the mounting groove is formed in the surface of the cylinder cover main body shell, the mounting seat is mounted on the surface of the mounting groove, the small threaded holes and the large threaded holes are formed in the surface of the mounting seat at equal intervals, and the aperture of the large threaded hole is larger than that of the small threaded hole; the bolt mechanism is connected with the small threaded hole in a threaded manner and used for fixing; protection machanism, protection machanism who is used for sealed protection is installed to large-size screw hole inner wall, through bolt mechanism, with engine cylinder lid main part fixed connection, through protection machanism, conveniently prevents the protection of preventing dust to large-size screw hole inside, prevents that impurity such as dust from getting into large-size screw hole inside, influences the installation of engine cylinder lid main part.

Preferably, bolt mechanism includes shank of bolt, connecting block, screw thread texture and installation piece, the shank of bolt is installed to small-size screw hole inner wall, the connecting block is installed at the shank of bolt top, the screw thread texture is installed to shank of bolt surface equidistance, and small-size screw hole and screw thread texture threaded connection, the installation piece has been seted up at the connecting block top, bolt mechanism still includes locating piece and sliding block, presss from both sides tight installation piece with the spanner, rotates the installation piece, and the installation piece drives the connecting block and rotates, and the connecting block drives the shank of bolt and rotates, and screw thread texture cooperation small-size screw hole is with bolt mechanism and engine cylinder lid main part threaded connection, conveniently fixes engine cylinder lid main part stably.

Preferably, the small threaded hole inner wall rotates and is connected with the locating piece, bolt mechanism inner wall slidable mounting has the sliding block, and locating piece and sliding block structural cooperation, and the shank of bolt is close to small threaded hole inside, and the locating piece gets into the shank of bolt inner wall, and the shank of bolt inner wall is hugged closely with the sliding block to locating piece extrusion sliding block, makes things convenient for the shank of bolt to fix a position, guarantees that bolt mechanism can not misplace easily at the rotation in-process, influences engine cylinder lid main part and bolt mechanism's threaded connection.

Preferably, the section of the installation block is an equilateral hexagon, the installation block and a wrench or other installation tools are conveniently and quickly fixed, the installation efficiency of the bolt mechanism is improved, the equilateral hexagon has strong applicability, and the overall convenience of the bolt mechanism is improved.

Preferably, the protection mechanism comprises a protection rod, a rubber sealing sleeve, a symmetrical groove, a symmetrical block and a symmetrical spring, the protection rod is arranged inside a large threaded hole, the rubber sealing sleeve is arranged at the top of the protection rod, the symmetrical groove is symmetrically formed in the inner wall of the large threaded hole, the symmetrical block is slidably arranged on the inner wall of the symmetrical groove, the protection rod is matched with the symmetrical block in structure, the symmetrical spring is arranged inside the symmetrical groove, the symmetrical block is fixedly connected with the symmetrical spring, the protection rod is close to the large threaded hole, the symmetrical block slides along the inner wall of the symmetrical groove and enters the symmetrical groove in advance, the symmetrical spring is stretched after being tightened up, the symmetrical block is moved out of the symmetrical groove, the protection rod is matched with the protection rod, the protection rod is fixedly connected with the large threaded hole, and the large threaded hole is sealed and protected.

Preferably, the protection mechanism further comprises an extrusion sliding block, the surface of the protection rod is provided with the extrusion sliding block in a sliding mode, the extrusion sliding block is matched with the symmetrical block in structure, the rubber sealing sleeve is pressed, the rubber sealing sleeve drives the protection rod to move downwards to drive the extrusion sliding block to extrude the symmetrical block, the symmetrical block is sent into the symmetrical groove, the protection mechanism and a large threaded hole are conveniently separated, the protection mechanism is taken down, a bolt mechanism is installed inside the large threaded hole, and the engine cylinder cover main body is fixedly connected.

Preferably, the edge of the extrusion sliding block is provided with a round angle, when the edge of the extrusion sliding block extrudes the surface of the symmetrical block, the friction force between the extrusion sliding block and the surface of the symmetrical block is reduced, the abrasion between the extrusion sliding block and the symmetrical block is reduced, the service lives of the symmetrical block and the extrusion sliding block are prolonged, and the functionality of the extrusion sliding block is improved.

Preferably, the thread texture surface scribbles lubricating oil, reduces the frictional force of bolt mechanism and small-size screw hole inner wall, conveniently with the quick and small-size screw hole equipment of bolt mechanism, improves the inside leakproofness of small-size screw hole and bolt mechanism simultaneously, prevents that bolt mechanism surface from rustting, leads to the unable small-size screw hole of following of bolt mechanism inside to shift out.

Compared with the prior art, the bolt fixing structure for the cylinder head of the natural gas engine provided by the utility model has the following beneficial effects:

1. the bolt fixing structure for the cylinder cover of the natural gas engine provided by the utility model has the advantages that the bolt is conveniently positioned by installing the bolt mechanism and the protection mechanism, the bolt or the cylinder cover of the natural gas engine cannot be easily damaged in the rotation process of the bolt, and meanwhile, the installation hole is protected from dust.

2. The utility model provides a bolt fixing structure for a cylinder head of a natural gas engine, which reduces the friction force between a bolt mechanism and the inner wall of a small threaded hole by coating lubricating oil on the surface of a thread texture, facilitates the rapid assembly of the bolt mechanism with the small threaded hole, improves the sealing performance between the small threaded hole and the inside of the bolt mechanism, and prevents the surface of the bolt mechanism from rusting, so that the bolt mechanism cannot be moved out of the small threaded hole.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of a bolt fixing structure for a cylinder head of a natural gas engine according to the present invention;

FIG. 2 is a schematic structural view of the engine head body shown in FIG. 1;

FIG. 3 is a schematic view of a portion of the structure shown in FIG. 1;

FIG. 4 is a schematic view of the bolt mechanism shown in FIG. 1;

FIG. 5 is a second schematic structural view of the bolt mechanism shown in FIG. 1;

fig. 6 is a schematic structural view of the guard mechanism shown in fig. 1.

Reference numbers in the figures: 1. an engine cylinder head body; 11. a cylinder head body shell; 12. mounting grooves; 13. a mounting seat; 14. a small threaded hole; 15. a large threaded hole; 2. a bolt mechanism; 21. a bolt shank; 22. connecting blocks; 23. thread texture; 24. mounting blocks; 25. positioning a block; 26. a slider; 3. a protection mechanism; 31. a guard bar; 32. a rubber sealing sleeve; 33. a symmetrical groove; 34. a symmetric block; 35. a symmetrical spring; 36. the slider is pressed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Referring to fig. 1 and fig. 2, a bolt fixing structure for a cylinder head of a natural gas engine according to an embodiment of the present invention includes: the engine cylinder cover comprises an engine cylinder cover main body 1, wherein the engine cylinder cover main body 1 comprises a cylinder cover main body shell 11, a mounting groove 12, a mounting seat 13, a small threaded hole 14 and a large threaded hole 15, the mounting groove 12 is formed in the surface of the cylinder cover main body shell 11, the mounting seat 13 is mounted on the surface of the mounting groove 12, the small threaded hole 14 and the large threaded hole 15 are equidistantly formed in the surface of the mounting seat 13, and the aperture of the large threaded hole 15 is larger than that of the small threaded hole 14; the bolt mechanism 2 is connected with the small threaded hole 14 through threads and used for fixing; protection machanism 3, protection machanism 3 that is used for sealed protection is installed to No. 15 inner walls of large-size screw hole, through bolt mechanism 2, with 1 fixed connection of engine cylinder lid main part, through protection machanism 3, conveniently prevents the protection of preventing dust to No. 15 inside screw holes, prevents that impurity such as dust from getting into No. 15 inside screw holes of large-size, influences the installation of engine cylinder lid main part 1.

Referring to fig. 3 and 4, the bolt mechanism 2 includes a bolt bar 21, a connecting block 22, thread textures 23 and a mounting block 24, the bolt bar 21 is mounted on the inner wall of the small threaded hole 14, the connecting block 22 is mounted at the top of the bolt bar 21, the thread textures 23 are mounted on the surface of the bolt bar 21 at equal intervals, the small threaded hole 14 is in threaded connection with the thread textures 23, the mounting block 24 is formed at the top of the connecting block 22, the bolt mechanism 2 further includes a positioning block 25 and a sliding block 26, the mounting block 24 is clamped by a wrench, the mounting block 24 is rotated, the mounting block 24 drives the connecting block 22 to rotate, the connecting block 22 drives the bolt bar 21 to rotate, the thread textures 23 are matched with the small threaded hole 14, the bolt mechanism 2 is in threaded connection with the engine cylinder cover main body 1, and the engine cylinder cover main body 1 is conveniently and stably fixed.

Referring to fig. 4 and 5, the inner wall of the small threaded hole 14 is rotatably connected with a positioning block 25, the inner wall of the bolt mechanism 2 is slidably mounted with a sliding block 26, the positioning block 25 is structurally matched with the sliding block 26, the bolt rod 21 is close to the inside of the small threaded hole 14, the positioning block 25 enters the inner wall of the bolt rod 21, the positioning block 25 extrudes the sliding block 26, and the sliding block 26 is tightly attached to the inner wall of the bolt rod 21, so that the bolt rod 21 can be conveniently positioned, the bolt mechanism 2 is ensured not to be easily dislocated in the rotating process, and the threaded connection between the engine cylinder head main body 1 and the bolt mechanism 2 is affected.

Referring to fig. 3 and 4, the section of the mounting block 24 is an equilateral hexagon, which facilitates quick fixing of the mounting block 24 and a wrench or other mounting tools, improves the mounting efficiency of the bolt mechanism 2, and the equilateral hexagon has strong applicability and improves the overall convenience of the bolt mechanism 2.

Referring to fig. 6, the protection mechanism 3 includes a protection rod 31, a rubber sealing sleeve 32, a symmetrical groove 33, a symmetrical block 34 and a symmetrical spring 35, a protective rod 31 is arranged in the large threaded hole 15, a rubber sealing sleeve 32 is arranged at the top of the protective rod 31, symmetrical grooves 33 are symmetrically formed in the inner wall of the large threaded hole 15, symmetrical blocks 34 are slidably mounted on the inner wall of the symmetrical grooves 33, and the guard bar 31 is matched with the symmetrical block 34, the symmetrical groove 33 is internally provided with a symmetrical spring 35, and the symmetrical block 34 is fixedly connected with the symmetrical spring 35, the guard bar 31 is close to the large-size threaded hole 15, symmetrical piece 34 slides along symmetrical groove 33 inner wall, enters into symmetrical groove 33 inside earlier, and symmetrical spring 35 opens after tightening up, shifts out symmetrical piece 34 symmetrical groove 33, and cooperation protective rod 31 is with protective rod 31 and large-size screw hole 15 fixed connection, protects large-size screw hole 15 sealed.

Referring to fig. 6, the protection mechanism 3 further includes an extrusion sliding block 36, the surface of the protection rod 31 is provided with the extrusion sliding block 36 in a sliding manner, the extrusion sliding block 36 is matched with the symmetrical block 34 in a structure, the rubber sealing sleeve 32 is pressed, the rubber sealing sleeve 32 drives the protection rod 31 to move downwards, the extrusion sliding block 36 is driven to extrude the symmetrical block 34, the symmetrical block 34 is sent into the symmetrical groove 33, the protection mechanism 3 and the large threaded hole 15 are conveniently separated, the protection mechanism 3 is taken down, the bolt mechanism 2 is installed inside the large threaded hole 15, and the engine cylinder cover main body 1 is fixedly connected.

Referring to fig. 6, the edge of the extrusion sliding block 36 is provided with a rounded corner, and when the edge of the extrusion sliding block 36 extrudes the surface of the symmetric block 34, the friction force between the extrusion sliding block 36 and the surface of the symmetric block 34 is reduced, the abrasion between the extrusion sliding block 36 and the symmetric block 34 is reduced, the service lives of the symmetric block 34 and the extrusion sliding block 36 are prolonged, and the functionality of the extrusion sliding block 36 is improved.

Referring to fig. 4, the surface of the thread texture 23 is coated with lubricating oil, so that friction between the inner walls of the bolt mechanism 2 and the small threaded hole 14 is reduced, the bolt mechanism 2 is conveniently and rapidly assembled with the small threaded hole 14, meanwhile, the sealing performance between the small threaded hole 14 and the inner part of the bolt mechanism 2 is improved, and the surface of the bolt mechanism 2 is prevented from rusting, so that the bolt mechanism 2 cannot be moved out of the small threaded hole 14.

The working principle of the bolt fixing structure for the cylinder cover of the natural gas engine provided by the utility model is as follows: the engine cylinder cover main body 1 is fixedly connected through the bolt mechanism 2, the mounting block 24 is clamped by a spanner, the mounting block 24 is rotated, the mounting block 24 drives the connecting block 22 to rotate, the connecting block 22 drives the bolt rod 21 to rotate, the thread texture 23 is matched with the small threaded hole 14, the bolt mechanism 2 is in threaded connection with the engine cylinder cover main body 1, the engine cylinder cover main body 1 is convenient to stably fix, the bolt rod 21 is close to the inside of the small threaded hole 14, the positioning block 25 enters the inner wall of the bolt rod 21, the sliding block 26 is extruded by the positioning block 25 and is tightly attached to the inner wall of the bolt rod 21, the bolt rod 21 is convenient to position, the bolt mechanism 2 is ensured not to be easily dislocated in the rotating process, the threaded connection of the engine cylinder cover main body 1 and the bolt mechanism 2 is influenced, the inside of the large threaded hole 15 is convenient to be protected from dust through the protection mechanism 3, and impurities such as dust are prevented from entering the inside the large threaded hole 15, the installation of the engine cylinder cover main body 1 is influenced, the protective rod 31 is close to the large threaded hole 15, the symmetrical block 34 slides along the inner wall of the symmetrical groove 33 and firstly enters the symmetrical groove 33, the symmetrical spring 35 is tightened and then is opened, the symmetrical block 34 is moved out of the symmetrical groove 33 and is matched with the protective rod 31, the protective rod 31 is fixedly connected with the large threaded hole 15, the large threaded hole 15 is sealed and protected, the rubber sealing sleeve 32 is pressed, the rubber sealing sleeve 32 drives the protective rod 31 to move downwards to drive the extrusion sliding block 36 to extrude the symmetrical block 34, the symmetrical block 34 is sent into the symmetrical groove 33, the protective mechanism 3 is conveniently separated from the large threaded hole 15, the protective mechanism 3 is taken down, the bolt mechanism 2 is installed in the large threaded hole 15, the engine cylinder cover main body 1 is fixedly connected, the section of the installation block 24 is equilateral hexagon, the installation block 24 and a wrench or other installation tools are conveniently and quickly fixed, the installation efficiency of bolt mechanism 2 is improved, equilateral hexagon has very strong suitability, the holistic convenience of bolt mechanism 2 has been improved, round angle has been seted up through extrusion slider 36 edge, when extrusion slider 36 edge extrusion symmetry piece 34 surface, reduce the frictional force on extrusion slider 36 and symmetry piece 34 surface, reduce the wearing and tearing of extrusion slider 36 and symmetry piece 34, prolong the life of symmetry piece 34 and extrusion slider 36, the functionality of extrusion slider 36 has been improved, scribble lubricating oil through 23 surfaces of screw thread texture, reduce the frictional force of bolt mechanism 2 and small number screw hole 14 inner wall, conveniently assemble bolt mechanism 2 fast with small number screw hole 14, improve small number screw hole 14 and the inside leakproofness of bolt mechanism 2 simultaneously, prevent that bolt mechanism 2 surface from rusting, lead to bolt mechanism 2 can't shift out from small number screw hole 14 is inside.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (6)

1. The utility model provides a bolt fastening structure for natural gas engine cylinder head which characterized in that includes:

the engine cylinder cover comprises an engine cylinder cover main body (1), wherein the engine cylinder cover main body (1) comprises a cylinder cover main body shell (11), a mounting groove (12), a mounting seat (13), a small threaded hole (14) and a large threaded hole (15), the surface of the cylinder cover main body shell (11) is provided with the mounting groove (12), the surface of the mounting groove (12) is provided with the mounting seat (13), the surface of the mounting seat (13) is provided with the small threaded hole (14) and the large threaded hole (15) at equal intervals, and the aperture of the large threaded hole (15) is larger than that of the small threaded hole (14);

the bolt mechanism (2) is connected with the small threaded hole (14) through threads and used for fixing;

the inner wall of the large threaded hole (15) is provided with the protection mechanism (3) for sealing protection;

the bolt mechanism (2) comprises a bolt rod (21), a connecting block (22), thread textures (23) and a mounting block (24), the bolt rod (21) is mounted on the inner wall of the small threaded hole (14), the connecting block (22) is mounted at the top of the bolt rod (21), the thread textures (23) are mounted on the surface of the bolt rod (21) at equal intervals, the small threaded hole (14) is in threaded connection with the thread textures (23), the mounting block (24) is arranged at the top of the connecting block (22), and the bolt mechanism (2) further comprises a positioning block (25) and a sliding block (26);

the inner wall of the small threaded hole (14) is rotatably connected with a positioning block (25), a sliding block (26) is installed on the inner wall of the bolt mechanism (2) in a sliding mode, and the positioning block (25) is matched with the sliding block (26) in a structure.

2. The natural gas engine head bolting structure according to claim 1, wherein said mounting block (24) is an equilateral hexagon in cross section.

3. The bolt fixing structure for the cylinder head of the natural gas engine according to claim 1, wherein the protection mechanism (3) comprises a protection rod (31), a rubber sealing sleeve (32), symmetrical grooves (33), symmetrical blocks (34) and symmetrical springs (35), the protection rod (31) is installed inside the large threaded hole (15), the rubber sealing sleeve (32) is installed at the top of the protection rod (31), the symmetrical grooves (33) are symmetrically formed in the inner wall of the large threaded hole (15), the symmetrical blocks (34) are slidably installed on the inner wall of the symmetrical grooves (33), the protection rod (31) is structurally matched with the symmetrical blocks (34), the symmetrical springs (35) are installed inside the symmetrical grooves (33), and the symmetrical blocks (34) are fixedly connected with the symmetrical springs (35).

4. The natural gas engine head bolt fixing structure according to claim 3, characterized in that the guard mechanism (3) further comprises a pressing slider (36), the pressing slider (36) is slidably mounted on the surface of the guard rod (31), and the pressing slider (36) is structurally matched with the symmetrical block (34).

5. The natural gas engine head bolt fastening structure according to claim 4, wherein the edge of the extrusion slider (36) is rounded.

6. The natural gas engine head bolting structure according to claim 1, wherein said thread pattern (23) is surface-coated with a lubricating oil.

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