CN218177750U

CN218177750U - Bush dismounting device

Info

Publication number: CN218177750U
Application number: CN202221788220.1U
Authority: CN
Inventors: 周瑜
Original assignee: Jiangsu Xiake Power Technology Co ltd
Current assignee: Jiangsu Xiake Power Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-12-30
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to the technical field of engines, in particular to bush dismounting device. The oil-free bushing is provided with a bushing body, an oil passing groove is formed in the middle periphery of the bushing body, oil holes are formed in the center of the oil passing groove and are formed in the radial direction of the bushing body, and the number of the oil holes is at least three. The utility model discloses the relative bearing of bush force-feed lubrication structure adds oily composite set cost lower, occupation space is littleer, the installation more saves time, and is efficient. The utility model discloses the bush compares with ordinary bush structure, and this built-in oil duct of bush structure possesses stronger leakproofness, and inorganic oil leakage divides danger, safe and reliable.

Description

Bush dismounting device

Technical Field

The utility model relates to the technical field of engines, in particular to bush dismounting device.

Background

In the moving parts of the engine, because the abrasion of parts is caused by long-term friction, the parts must be replaced when the clearance between the shaft and the hole is abraded to a certain degree, therefore, the material with lower hardness and better wear resistance is selected as the shaft sleeve or the bushing during the design, the abrasion of the shaft and the seat can be reduced, and the cost for replacing the shaft or the seat can be saved when the bushing is abraded to a certain degree for replacement.

Generally, the bush is in interference fit with the seat, and is in clearance fit with the shaft, because abrasion cannot be avoided, the bush is used for replacing a rolling bearing at places with higher radial load and higher clearance requirement (such as a camshaft, a balance shaft and the front end of a crankshaft); meanwhile, part of the bushings are also provided with an outer wall oil passage or an inner wall oil passage, which has the functions of lubricating the shaft diameter and serving as a local oil passage, which is a function that cannot be replaced by a bearing structure.

For easy to assemble and disassemble, the bushing is designed into a straight-through thin-wall structure, and meanwhile, the mounting hole can only be made into a through hole, so that the problem of oil leakage of the sealing end face caused by large engine oil pressure is undoubtedly solved when the bushing is provided with a local oil duct. The cost is high because the shaft end is completely in a bearing structure. The bearing structure has great difficulty in arranging the built-in oil duct, and an oil passing device needs to be added. The external oil duct and the through hole press-fitting bushing structure easily generates engine oil leakage points, and brings reliability problems to the engine with poor working environment. If the end closed type bushing is used, the bushing is difficult to take out, and inconvenience is brought to machine maintenance. There is a need for an apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, provide a bush dismounting device.

Realize the utility model discloses the technical scheme of purpose is: a bush dismounting device is used for dismounting a bush structure and comprises a mandrel, a clamping jaw, an elastic piece and a bolt; the clamping jaw structure comprises clamping jaws, a central spindle and a lining structure, wherein the clamping jaws are arranged on the inner side of the central spindle, the lining structure comprises oil holes, the number of the oil holes is equal to that of the oil holes of the lining structure, the oil holes correspond to the number of the oil holes, the bottom ends of the clamping jaws are installed on the periphery of the bottom end of the central spindle in a pin joint mode, the upper sections of the clamping jaws and the central spindle are connected through elastic pieces, the upper section of the inner side of the central spindle is provided with a threaded hole, the lower section of the inner side of the central spindle is provided with a smooth coaxial pore channel, and the bolt is in threaded connection with the threaded hole.

Furthermore, the outer side of the clamping jaw is smooth, a boss is arranged at the top end of the clamping jaw, and the clamping jaw is contracted within the maximum outer diameter of the mandrel in a tightening state.

Further, the mandrel is in clearance fit with the inner hole of the bushing structure.

Further, the elastic member is a spring.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) The utility model discloses the relative bearing of bush force-feed lubrication structure adds oily composite set cost lower, occupation space is littleer, the installation more saves time, and is efficient.

(2) The utility model discloses the bush compares with ordinary bush structure, and this built-in oil duct of bush structure possesses stronger leakproofness, and inorganic oil leakage divides danger, safe and reliable.

(3) The utility model discloses bush dismounting device has solved bush one end because of seal structure's dismantlement problem, and maintainability improves, easy operation, and maintenance cost reduces.

Drawings

In order that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings

FIG. 1 is a schematic structural view of a bushing according to the present invention;

FIG. 2 is a schematic structural view of the bushing removing device of the present invention;

fig. 3 is a schematic view of the working state of the bushing removing device of the present invention;

fig. 4 is a cross-sectional view of fig. 3.

Detailed Description

Example 1

Referring to fig. 1 and 4, the present embodiment is a bushing structure, and the bushing structure includes a bushing body 1, an oil passing groove 11 is disposed at a middle periphery of the bushing body 1, oil holes 12 are disposed at a center of the oil passing groove 11 and radially disposed along the bushing body 1, and the number of the oil holes 12 is four. The oil holes 12 are uniformly arranged. Form the forced lubrication to the kinematic pair at the position. The bushing body 1 and the box body 6 are in interference fit and are in close and reliable connection with an inner hole of the box body 6. The oil groove 11 is communicated with the oil channel of the box body 6 to form a part of the built-in oil channel.

Example 2

Referring to fig. 2 to 4, the present embodiment is a bush dismounting device for dismounting the bush structure of embodiment 1, having a mandrel 2, jaws 3, elastic members 4 and bolts 5; 3 quantity of jack catch and the 12 quantity in oilhole of bush structure are the same, and the position corresponds, and 3 bottoms of jack catch are rotationally installed in 2 bottoms peripheries of dabber through the pin joint, and 3 upper segments of jack catch meet through elastic component 4 with dabber 2, and elastic component 4 is the spring. The upper section of the inner side of the mandrel 2 is provided with a threaded hole 21, the lower section is provided with a smooth coaxial pore passage 22, and the bolt 5 is in threaded connection with the threaded hole 21.

The outer side of the claw 3 is smooth, and the top end of the claw is provided with a boss 31 for axially locking the bushing. The clamping jaw 3 is in an opening state in a free state and is contracted within the maximum outer diameter of the mandrel 2 in a tightening state. The mandrel 2 is in clearance fit with the inner hole of the bushing structure.

When the bush needs to be replaced, the device is only required to be inserted into the inner hole of the bush, the clamping jaw 3 is contracted inwards under the constraint force of the inner hole of the bush, and is expanded outwards under the action of the spring when meeting the oil hole 12, so that the bush is axially locked. At the moment, only the bolt 5 needs to be disassembled by spinning, the mandrel 2 props against the end face of the box body 6 under the action of the bolt 5, and the device moves outwards until the bushing is pulled out of the inner hole of the box body 6. The removal of the liner is completed.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bush dismounting device is used for dismounting a bush structure and is characterized in that: the clamping device is provided with a mandrel (2), clamping jaws (3), an elastic piece (4) and a bolt (5); jack catch (3) quantity is the same with oilhole (12) quantity of bush structure, and the position corresponds, install in dabber (2) bottom periphery through the pin joint jack catch (3) bottom, jack catch (3) upper segment and dabber (2) meet through elastic component (4), dabber (2) inboard upper segment is provided with screw hole (21), and the hypomere is provided with glossy coaxial pore (22), bolt (5) and screw hole (21) spiro union.

2. The bushing removing apparatus according to claim 1, wherein: the outside of the clamping jaw (3) is smooth, the top end of the clamping jaw is provided with a boss (31), and the clamping jaw is contracted within the maximum outer diameter of the mandrel (2) in a tightening state.

3. The bushing removing apparatus according to claim 1, wherein: the mandrel (2) is in clearance fit with an inner hole of the bushing structure.

4. A bushing-removing device according to claim 1, wherein: the elastic piece (4) is a spring.