CN213259257U

CN213259257U - Portable and rapid engine cam bearing bush dismounting tool

Info

Publication number: CN213259257U
Application number: CN202022252949.4U
Authority: CN
Inventors: 李军; 汪志刚; 袁亚琴; 黎海涛
Original assignee: CRRC Ziyang Co Ltd
Current assignee: CRRC Ziyang Co Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-05-25
Anticipated expiration: 2030-10-12

Abstract

The utility model relates to a diesel engine cam axle bush technical field, concretely relates to light swift engine cam axle bush assembly and disassembly tools, press from both sides tight structure and the pushing structure who is used for promoting the tight structure of axle bush clamp including the axle bush, the pushing structure include drive piston assembly, drive piston assembly includes double-acting piston cylinder and sets up the piston head in the piston cylinder, is provided with the promotion on the piston head and adjusts the head. The utility model provides an assembling and disassembling tool which has a smaller structure and is more convenient to use by improving the structure of the assembling and disassembling tool, and the assembling and disassembling tool can be placed in the open space of the cam to realize the installation of the bearing bush; and the dismounting tool clamps and fixes the bearing bush before installing the bearing bush, so that the stress is more uniform, and the problem that the bearing bush is deformed in the installation process to influence the subsequent work is avoided.

Description

Portable and rapid engine cam bearing bush dismounting tool

Technical Field

The utility model relates to a diesel engine cam axle bush technical field, concretely relates to light swift engine cam axle bush assembly and disassembly tools.

Background

The diesel engine is widely applied to a marine power generation auxiliary machine, and in the manufacturing process of the diesel engine, the assembly process of the cam bearing bush originally adopts a method of pressing in a mandrel and a screw jack, as shown in figure 1. Because the bearing position of the camshaft has 9 grades, the total length of the machine body is nearly 4000mm, and the length of the mandrel must be made into five specifications of 198mm, 688mm, 1160mm, 1664mm and 2152mm, so that the limitation of the assembly space and the connection of the compression screw jack can be met. The specific operation method comprises the following steps: the first step is to press in 5, 4, 3, 2 and 1 gear bush with the mandrel from the left side of the machine body, and the second step is to press in 6, 7, 8 and 9 gear bush with the mandrel from the right side of the machine body.

This method of assembly has the following disadvantages:

1) the tool is heavy, the operation needs the cooperation of a crane, the number of workers can not be less than 3, and when the connecting bolt of the screw jack at the rear end needs to be disassembled every time one gear is pressed, the time and labor are wasted, the efficiency is low, and the labor intensity is high.

2) The tooling manufacturing cost is high.

3) The process of pressing in by adopting the mandrel is inconvenient for observing the alignment of the bearing bush oil hole and the engine body oil hole, and usually can cause the dislocation of the oil hole to cause rework.

4) The risk of pulling the bottom hole of the bearing bush is also existed due to poor cleanliness when the mandrel is withdrawn.

Therefore, the existing cam bearing bush mounting and dismounting structure has the improvement part, needs to be improved and optimized to obtain a more reasonable technical scheme, and solves the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that prior art mentioned in the above-mentioned content exists, the utility model provides a light swift engine cam axle bush assembly and disassembly tools aims at utilizing assembly and disassembly tools to fix the back dismouting to the cam axle bush, and the dismouting process does not harm the axle bush, does not lead to the axle bush to warp, and utilizes opening of cam to shelves the space and can realize the installation, has reduced erection equipment's size greatly, has improved the convenient degree of installation.

In order to achieve the above object, the utility model discloses the technical scheme who specifically adopts is:

the utility model provides a light swift engine cam axle bush assembly and disassembly tools, includes axle bush clamping structure and the pushing structure who is used for promoting axle bush clamping structure, pushing structure including drive piston assembly, drive piston assembly includes double-acting piston cylinder and the piston head of setting in the piston cylinder, overhead the pushing adjustment head that is provided with of piston.

Above-mentioned assembly and disassembly tools disclosed presss from both sides tight fixedly to the axle bush through utilizing the axle bush to press from both sides tight structure, sets up in advance in the shaft hole department that needs the installation axle bush, and rethread promotes the structure and pushes away the shaft hole with axle bush and axle bush clamp tight structure, takes off the installation that axle bush clamp tight structure had realized the axle bush at last.

Further, when a piston head in the double-acting piston cylinder moves towards the outside of the piston cylinder, the bearing bush clamping structure is pushed and the bearing bush is sent into the shaft hole, and after the piston head is pushed to the right position, the piston head moves back and resets; in this regard, the structure of the double-acting piston cylinder is optimized, and the following concrete feasible schemes are provided: the double-acting piston cylinder comprises a cylinder seat and a cylinder barrel, the rear end of the cylinder barrel is fixedly connected with one side of the cylinder seat, and a hydraulic interface assembly is arranged on the cylinder seat and conveys hydraulic medium into the cylinder barrel on one side of the piston head. The hydraulic interface assembly is externally connected with a hydraulic system, the hydraulic system provides hydraulic medium and conveys the hydraulic medium into the cylinder barrel, and the hydraulic system provides thrust for the piston head and enables the piston head to move.

Furthermore, the deformation amount of the hydraulic medium is small, so that a larger pushing force can be provided to push the bearing bush clamping structure, and a too large restoring force is not needed when the piston head is reset, so that the structure for resetting the piston head is optimized, and the following feasible schemes are provided: the front end of the cylinder barrel is provided with a sealing assembly and a pneumatic interface assembly, and a pneumatic medium is conveyed into the cylinder barrel on the other side of the piston head. The pneumatic interface assembly is connected with an external pneumatic system, and the pneumatic system provides compressed gas and conveys the compressed gas into the cylinder barrel, so that thrust is provided for the piston head and the piston head moves.

Further, in order to help fix the pushing structure and provide stable pushing force, the structure of the pushing structure is optimized, and the following specific feasible schemes are provided: the cylinder seat is provided with a counter-force seat.

Furthermore, the reaction seat and the cylinder seat are integrally formed.

Further, when the piston head moves, the outer end of the piston head contacts and applies force to the bearing clamp structure to push the bearing clamp structure to move, and specifically, a possible piston head structure scheme is taken as follows: the piston head is provided with a connecting hole along the axial direction, the pushing adjusting head is arranged in the connecting hole, and a connecting structure is arranged in the connecting hole to limit the depth of the pushing adjusting head entering the connecting hole.

Further, the connection structure is not uniquely determined, and various possible schemes can be adopted, and the connection structure disclosed in the above technical scheme is optimally explained here, and the following possible schemes are given: the connecting structure comprises threads arranged in the connecting hole, and the corresponding threads arranged on the pushing adjusting head are matched with the connecting hole.

Still further, the piston head exerts axial force when pushing axle bush clamping structure, and here optimizes the structure of pushing the regulation head in order to improve the efficiency of application of force, gives out following concrete feasible scheme: the front end of the pushing adjusting head is a spherical surface, and the bearing bush clamping structure is provided with an arc surface groove matched with the front end surface of the pushing adjusting head.

Still further, the bearing shell clamping structure is optimized to give the following concrete possibilities: the bearing bush clamping structure comprises a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are used for abutting two ends of a bearing bush respectively, and the first abutting portion and the second abutting portion are fixedly connected through a detachable pull rod.

Still further, the connection structure of the pull rod is optimized, and the following concrete feasible schemes are given: the first abutting portion and the second abutting portion are provided with connecting holes for the pull rod to penetrate through, the pull rod is a threaded rod, and the first abutting portion and the second abutting portion are tensioned and fixed at two ends of the bearing bush through threaded structures.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

the utility model provides an assembling and disassembling tool which has a smaller structure and is more convenient to use by improving the structure of the assembling and disassembling tool, and the assembling and disassembling tool can be placed in the open space of the cam to realize the installation of the bearing bush; and the dismounting tool clamps and fixes the bearing bush before installing the bearing bush, so that the stress is more uniform, and the problem that the bearing bush is deformed in the installation process to influence the subsequent work is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a conventional bearing bush mounting and dismounting tool.

Fig. 2 is a schematic view of the overall structure of the middle dismounting tool of the present invention.

Fig. 3 is an illustration of the structure of the mounting of the bearing bush by the dismounting tool of the utility model.

In the above drawings, the meanings of the respective symbols are: 1. a pull rod; 2. a first abutting portion; 3. bearing bushes; 4. a second abutting part; 5. a pneumatic interface assembly; 6. a cylinder barrel; 7. a hydraulic interface assembly; 8. a counter-force seat; 9. pushing the adjusting head; 10. a piston head.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

Examples

This embodiment is too big, the inconvenient problem that gets of installation to current axle bush assembly and disassembly tools, provides a new axle bush assembly and disassembly tools of institutional advancement. The method comprises the following specific steps:

as shown in fig. 2 and 3, a light and fast tool for disassembling and assembling a cam bearing bush 3 of an engine comprises a bearing bush 3 clamping structure and a pushing structure for pushing the bearing bush 3 clamping structure, wherein the pushing structure comprises a driving piston assembly, the driving piston assembly comprises a double-acting piston cylinder and a piston head 10 arranged in the piston cylinder, and a pushing adjusting head 9 is arranged on the piston head 10.

Above-mentioned assembly and disassembly tools, it is fixed to press from both sides tight structure through utilizing axle bush 3, sets up in advance in the shaft hole department that needs installation axle bush 3, and rethread promotion structure pushes into the shaft hole with axle bush 3 and the tight structure of axle bush 3 clamp, takes off the installation that axle bush 3 has been realized promptly to the tight structure of axle bush 3 clamp at last.

When the piston head 10 in the double-acting piston cylinder moves towards the outside of the piston cylinder, the shaft bushing 3 is pushed to clamp the structure and the shaft bushing 3 is sent into the shaft hole, and after the piston head 10 is pushed to the right position, the piston head moves back and resets; in this regard, the structure of the double-acting piston cylinder is optimized, and the following concrete feasible schemes are provided: the double-acting piston cylinder comprises a cylinder seat and a cylinder barrel 6, the rear end of the cylinder barrel 6 is fixedly connected with one side of the cylinder seat, a hydraulic interface component 7 is arranged on the cylinder seat, and hydraulic medium is conveyed into the cylinder barrel 6 on one side of a piston head 10. The hydraulic interface assembly 7 is external to the hydraulic system which provides hydraulic medium to the cylinder 6, providing thrust to the piston head 10 and moving the piston head 10.

The deformation amount of the hydraulic medium is small, a large pushing force can be provided to push the clamping structure of the bearing bush 3, and when the piston head 10 is reset, a large restoring force is not needed, so that the structure for resetting the piston head 10 is optimized, and the following feasible schemes are provided: the front end of the cylinder barrel 6 is provided with a sealing assembly and a pneumatic pressure interface assembly 5, and a pneumatic pressure medium is conveyed into the cylinder barrel 6 on the other side of the piston head 10. The pneumatic interface assembly 5 is connected with an external pneumatic system, and the pneumatic system provides compressed gas to be conveyed into the cylinder barrel 6, provides thrust for the piston head 10 and enables the piston head 10 to move.

In order to help fix the pushing structure and provide stable pushing force, the structure of the pushing structure is optimized, and the following specific feasible schemes are provided: the cylinder seat is provided with a counter-force seat 8.

Preferably, the reaction force seat 8 is integrally formed with the cylinder seat. The counter-force seat 8 is square, and the function of the counter-force seat is to tightly support the pushing structure, so that the pushing structure transmits force to the bearing bush 3 to clamp the structure, and the bearing bush 3 is driven into the shaft hole.

When the piston head 10 moves, the outer end of the piston head contacts and applies force to the bearing bush 3 clamping structure to push the bearing bush 3 clamping structure to move, and specifically, a possible structural scheme of the piston head 10 is as follows: the piston head 10 is provided with a connecting hole along the axial direction, the push adjusting head 9 is arranged in the connecting hole, and a connecting structure is arranged in the connecting hole to limit the depth of the push adjusting head 9 entering the connecting hole.

The connection structure is not uniquely determined, and various possible schemes can be adopted, and the connection structure disclosed in the above technical scheme is optimally explained here, and the following possible schemes are given: the connecting structure comprises threads arranged in the connecting hole, and the pushing adjusting head 9 is correspondingly provided with threads matched with the connecting hole. The advantage of this arrangement is that the stroke for pushing the adjusting head 9 can be set in the right position by the threaded connection when the bearing shell 3 is mounted; when the bearing bush 3 is required to be disassembled, the length of the adjusting head 9 can be prolonged through the threaded connection structure, the adjusting head 9 is pushed to move outwards, the clamping structure of the bearing bush 3 can be pushed out of the shaft hole, and the disassembly of the bearing bush 3 is completed.

The piston head 10 applies axial force when pushing the bearing bush 3 to clamp the structure, and here, the structure for pushing the adjusting head 9 is optimized to improve the force application efficiency, and the following specific feasible schemes are provided: the front end of the pushing adjusting head 9 is a spherical surface, and the bearing bush 3 clamping structure is provided with an arc surface groove matched with the front end surface of the pushing adjusting head 9.

The clamping structure of the bearing shell 3 is optimized to give the following concrete feasible schemes: the bearing bush 3 clamping structure comprises a first abutting portion 2 and a second abutting portion 4, the first abutting portion 2 and the second abutting portion 4 are used for abutting two ends of the bearing bush 3 respectively, and the first abutting portion 2 and the second abutting portion 4 are fixedly connected through a detachable pull rod 1.

Preferably, the first tight portion 2 and the second tight portion 4 are provided with a circular tight groove for engaging with the bearing bush 3, so that the first tight portion 2 and the second tight portion 4 can be conveniently connected to two ends of the bearing bush 3, and then tightened and fixed by the pull rod 1.

Preferably, the connecting structure of the pull rod 1 is optimized, and the following concrete feasible schemes are provided: the first tight portion 2 and the second tight portion 4 of supporting on be provided with the connecting hole that supplies pull rod 1 to pass, and pull rod 1 is the threaded rod, pull rod 1 supports tight portion 2 and the tight portion 4 tensioning of second through the helicitic texture and fixes the both ends at axle bush 3.

The above embodiments are just examples of the present invention, but the present invention is not limited to the above alternative embodiments, and those skilled in the art can obtain other various embodiments by arbitrarily combining the above embodiments, and any one can obtain other various embodiments by the teaching of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.

Claims

1. The utility model provides a light swift engine cam axle bush assembly and disassembly tools which characterized in that: the device comprises a bearing bush (3) clamping structure and a pushing structure used for pushing the bearing bush (3) clamping structure, wherein the pushing structure comprises a driving piston assembly, the driving piston assembly comprises a double-acting piston cylinder and a piston head (10) arranged in the piston cylinder, and a pushing adjusting head (9) is arranged on the piston head (10).

2. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 1, wherein: the double-acting piston cylinder comprises a cylinder seat and a cylinder barrel (6), the rear end of the cylinder barrel (6) is fixedly connected with one side of the cylinder seat, a hydraulic interface component (7) is arranged on the cylinder seat, and hydraulic medium is conveyed into the cylinder barrel (6) on one side of a piston head (10).

3. The tool for assembling and disassembling a cam bearing bush of an engine according to claim 1 or 2, which is characterized in that: the front end of the cylinder barrel (6) is provided with a sealing assembly and a pneumatic interface assembly (5) and conveys a pneumatic medium into the cylinder barrel (6) on the other side of the piston head (10).

4. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 2, wherein: the cylinder seat is provided with a counter-force seat (8).

5. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 4, wherein: the reaction seat (8) and the cylinder seat are integrally formed.

6. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 1, wherein: the piston head (10) is provided with a connecting hole along the axial direction, the pushing adjusting head (9) is arranged in the connecting hole, and a connecting structure is arranged in the connecting hole to limit the depth of the pushing adjusting head (9) entering the connecting hole.

7. The tool for assembling and disassembling a cam bearing shell of an engine as claimed in claim 6, wherein: the connecting structure comprises threads arranged in the connecting hole, and the pushing adjusting head (9) is correspondingly provided with threads matched with the connecting hole.

8. A portable and quick tool for mounting and dismounting a cam bearing shell of an engine as claimed in claim 1, 6 or 7, wherein: the front end of the pushing adjusting head (9) is a spherical surface, and a cambered surface groove matched with the front end surface of the pushing adjusting head (9) is arranged on the clamping structure of the bearing bush (3).

9. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 1, wherein: the bearing bush (3) clamping structure comprises a first abutting portion (2) and a second abutting portion (4), the first abutting portion (2) and the second abutting portion (4) are used for abutting two ends of the bearing bush (3) respectively, and the first abutting portion (2) and the second abutting portion (4) are fixedly connected through a detachable pull rod (1).

10. The tool for assembling and disassembling a cam bearing shell of an engine according to claim 9, wherein: the first tight portion (2) and the second tight portion (4) of supporting on be provided with the connecting hole that supplies pull rod (1) to pass, and pull rod (1) is the threaded rod, pull rod (1) support tight portion (2) and second tight portion (4) tensioning through the helicitic texture and fix the both ends at axle bush (3) with first.