CN211029840U

CN211029840U - Linear bearing disassembly mechanism

Info

Publication number: CN211029840U
Application number: CN201921634342.3U
Authority: CN
Inventors: 郑乐; 强中伟
Original assignee: Xian Fast Auto Drive Co Ltd
Current assignee: Xian Fast Auto Drive Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-17
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a linear bearing disassembly body, including the lead screw and extract the mechanism, the lower extreme of lead screw sets up circular boss, and the step lock joint of bearing hole, the lead screw adopts two semi-circular lead screws to assemble the constitution, be convenient for install the lower extreme of lead screw in the hole of bearing, exert ascending thrust to the lead screw through extracting the mechanism, realize the separation of bearing and dead eye, adopt this mechanism not only can harmless extract the bearing, make bearing reuse, and other spare parts such as casing can not be damaged in the dismouting, very big reduction after-sale cost of maintenance, the simple accurate of concurrent operation, can improve dismouting maintenance work efficiency. The tool is simple in structure and good in compatibility, can use a sleeve head air cannon or a ratchet wrench, can also use a pendulum bob, is low in cost, and is suitable for all service stations or maintenance stations.

Description

Linear bearing disassembly mechanism

Technical Field

The utility model relates to a bearing dismouting technical field specifically is a linear bearing disassembly body.

Background

A gear shifting fork shaft positioning linear bearing in a main box of the transmission is arranged in a corresponding bearing hole of a shell by adopting a one-time press fitting process. Generally, in after-sale maintenance service, when the linear bearing needs to be replaced or a transmission shell needs to be replaced and the linear bearing needs to be pulled out of an original shell, due to the fact that no proper tool clamp is provided, the bearing can be taken out only by knocking the inner flanging of the linear bearing and even destroying the bearing. The operation mode is low in efficiency and poor in operability, and due to the fact that the outer wall of the bearing is thin, the bearing is deformed and fails when the flanging is knocked, and the shell is easily damaged.

Although the bearing pulling-out mechanism can be detached by using a tool, the currently and commonly used bearing pulling-out mechanism is mainly structurally pulled out after being fastened or tensioned by a clamping jaw and a puller, or pulled out or knocked out by a pendulum bob by means of a hanging edge. But present derailleur declutch shift shaft location linear bearing is arranged in the dead eye of casing, and the space is narrow and small can't use the clamping jaw and draw the horse, and the pendulum also can't reliably be fixed simultaneously, consequently can't harm to pull out or knock out, so do not have suitable frock in the aspect of dismouting linear bearing.

SUMMERY OF THE UTILITY MODEL

The problem of the difficult and easy damage bearing of linear bearing dismantles in to current derailleur owner case, the utility model provides a linear bearing disassembly body can be fast convenient demolish linear bearing from the casing, and can not harm linear bearing, dismantles efficiently.

The utility model discloses a realize through following technical scheme:

a linear bearing dismounting mechanism comprises a screw rod and a pulling-out mechanism;

the screw rod is provided with threads, the lower end of the outer wall of the screw rod is provided with a circular boss, the circular boss is used for being buckled on a step of an inner hole of the bearing, the pull-out mechanism is connected with the upper end of the screw rod through the threads, and the pull-out mechanism is used for applying upward force to the screw rod to enable the bearing to be separated from the bearing hole;

the screw rod is formed by splicing two semicircular screw rods;

the semicircular screw rod is a semicircular cylinder, threads are arranged on the arc-shaped side wall of the semicircular screw rod, and a semicircular boss is arranged at the lower end of the arc-shaped side wall of the semicircular screw rod.

Preferably, the device further comprises a fastening nut;

when the bosses of the two semicircular screw rods are buckled in the inner holes of the bearings, the vertical side walls of the two semicircular screw rods are aligned with each other, and the fastening nuts are installed on the two semicircular screw rods through threads.

Preferably, the pulling-out mechanism comprises a sleeve and a screwing-out nut;

the sleeve is coaxially sleeved on the screw rod, the lower end of the sleeve is abutted to the transmission shell, the screwing-out nut is installed on the screw rod, the lower end face of the screwing-out nut is abutted to the top face of the sleeve, and the bearing can move upwards and enter the sleeve by rotating the nut.

Preferably, a positioning ring is arranged in an inner hole at the upper end of the sleeve, and the sleeve is sleeved on the screw rod through the positioning ring.

Preferably, one end of the pull-out nut is connected with the screw rod through threads, and the other end of the pull-out nut is connected with the pull hammer.

Preferably, the pull-out nut comprises a screw and a nut fixedly arranged at the lower end of the screw, the nut is connected with the screw rod, and the screw is connected with the pull rod of the pull hammer through threads.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a linear bearing disassembly body, including the lead screw and extract the mechanism, the lower extreme of lead screw sets up circular boss, and the step lock joint of bearing hole, the lead screw adopts two semi-circular lead screws to assemble the constitution, be convenient for install the lower extreme of lead screw in the hole of bearing, exert ascending thrust to the lead screw through extracting the mechanism, realize the separation of bearing and dead eye, adopt this mechanism not only can harmless extract the bearing, make bearing reuse, and other spare parts such as casing can not be damaged in the dismouting, very big reduction after-sale cost of maintenance, the simple accurate of concurrent operation, can improve dismouting maintenance work efficiency.

The utility model discloses well provide two kinds of mechanisms of extracting, one of them adopts the sleeve as supporting, twists out the nut through the optional equipment, makes lead screw rebound and then accomplishes the dismantlement of bearing, and another kind is connected with drawing the hammer through pulling out the nut, directly applys ascending thrust through drawing the hammer, accomplishes the dismantlement of bearing, and above-mentioned two kinds of mechanisms simple structure is convenient for make and purchase moreover, and low cost is fit for all service stations or maintenance stations and uses.

Drawings

FIG. 1 is a structural view of a detaching mechanism according to embodiment 1 of the present invention;

FIG. 2 is a structural view of a detaching mechanism according to embodiment 2 of the present invention;

fig. 3 is a schematic structural view of the sleeve of the present invention;

fig. 4 is a schematic structural view of the semicircular screw rod of the present invention;

fig. 5 is a top view of fig. 4.

In the figure: 1. a screw rod; 2. screwing out the nut; 3. a sleeve; 4. fastening a nut; 5. a bearing; 6. pulling out the nut; 7. pulling a hammer; 8. semicircular screw rods.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.

Example 1

Referring to fig. 1, a linear bearing dismounting mechanism includes a screw rod 1, a sleeve 3, a fastening nut 4 and a screw-out nut 2.

The bearing 5 is installed in a shell of the transmission, the lower end of the screw rod 1 extends into an inner hole of the bearing 5 and is fastened with a step at the upper end of the inner hole of the bearing 5, the sleeve 3 is sleeved on the screw rod 1, the lower end of the sleeve 3 is abutted to the top of the transmission shell, the screw-out nut 2 is installed on the screw rod 1, and the lower end face of the screw rod is abutted to the top face of the sleeve.

When dismantling the bearing, use the rotatory nut 2 of twisting out of sleeve pipe, because nut 2 butt is at the top of sleeve 3, consequently when rotatory nut 2 of twisting out, 1 upward movement of lead screw, simultaneously because the lower extreme of lead screw 1 and the hole joint of bearing, lead screw 1 is at the in-process of rebound, progressively extracts the bearing from the dead eye of gearbox casing, makes the bearing get into the inside of sleeve 3, and the bearing is accomplished and is separated with the dead eye until the bearing, accomplishes the dismantlement of bearing and gearbox casing.

Referring to fig. 3, the inner hole of the sleeve 3 is larger than the outer diameter of the bearing, so that the bearing can enter the sleeve 3 during the upward movement process. A positioning ring is arranged in an inner hole at the upper end of the sleeve 3, the sleeve is sleeved on the screw rod through the positioning ring, the sleeve and the screw rod are coaxial, and a bearing can enter the sleeve.

Referring to fig. 4 and 5, lead screw 1 includes the screw rod and sets up the boss on the outer wall of screw rod lower extreme, and the boss is used for the lock joint at bearing hole step joint, lead screw 1 comprises two semicircle lead screws 8 that the structure is the same, and the cross-section of semicircle lead screw 8 is semi-circular, is provided with semi-circular boss on the arc lateral wall of semicircle lead screw 8 lower extreme, is provided with the screw thread on the arc outer wall, and two semicircle lead screws 8's perpendicular inner wall is hugged closely, forms the lead screw 1 of accomplishing.

During the use, pack into the hole of bearing in proper order with the lower extreme of two semicircle lead screws 8 to make the top of semicircular boss and the bottom surface contact of bearing hole step, then align two semicircle lead screws, and install fastening nut 4 on two semicircle lead screws, prevent that two semicircle lead screws from removing. Because the diameter of the boss is larger than that of the step of the inner hole of the bearing, the screw rod consists of two semicircular screw rods, and the screw rod is convenient to be arranged in the inner hole of the bearing.

Example 2

The linear bearing dismounting mechanism provided by the embodiment is different from the linear bearing dismounting mechanism provided by the embodiment 1 in that a sleeve 3 and a screwing-out nut 2 are eliminated, the bearing is taken out of a shell by adopting a pulling-out nut and a pulling hammer, the structure and the installation mode of a screw rod are the same, and the specific structure is as follows.

Referring to fig. 2, a linear bearing dismounting mechanism includes a screw 1, a draw-out nut 6, and a draw hammer 7.

The screw rod is clamped in an inner hole of the bearing, one end of the pull-out nut 6 is in threaded connection with the screw rod, the other end of the pull-out nut 6 is connected with the pull hammer, the hammer head on the pull hammer 7 is operated to enable the pull hammer to move along a pull rod shaft of the pull hammer to generate upward impact force, and then the bearing and the shell are detached.

The pull-out nut 6 comprises a screw and a nut fixedly arranged at the lower end of the screw, the nut is connected with the screw rod 1, and the screw is connected with the pull rod of the pull hammer through threads.

The utility model discloses a linear bearing disassembly body adopts this mechanism not only can harmless extracting the bearing, makes bearing reuse to the dismouting can not damage other spare parts such as casing, very big reduction after-sale cost of maintenance, and easy simple operation of concurrent operation can improve dismouting maintenance work efficiency. The tool is simple in structure and good in compatibility, can use a sleeve head air cannon or a ratchet wrench, can also use a pendulum bob, is low in cost, and is suitable for all service stations or maintenance stations.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims

1. The linear bearing dismounting mechanism is characterized by comprising a screw rod (1) and a pulling-out mechanism;

the screw rod (1) is provided with threads, the lower end of the outer wall of the screw rod is provided with a circular boss, the circular boss is used for being buckled on a step of an inner hole of a bearing, the pulling-out mechanism is connected with the upper end of the screw rod (1) through the threads, and the pulling-out mechanism is used for applying upward force to the screw rod to enable the bearing to be separated from the bearing hole;

the screw rod (1) is formed by splicing two semicircular screw rods (8);

the section of the semicircular screw rod (8) is a semicircular cylinder, threads are arranged on the arc-shaped side wall of the semicircular screw rod (8), and a semicircular boss is arranged at the lower end of the arc-shaped side wall of the semicircular screw rod (8).

2. The linear bearing dismounting mechanism according to claim 1, characterized by further comprising a fastening nut (4);

when the bosses of the two semicircular screw rods (8) are buckled in the inner holes of the bearing (5), the vertical side walls of the two semicircular screw rods (8) are aligned with each other, and the fastening nuts (4) are installed on the two semicircular screw rods (8) through threads.

3. Linear bearing dismounting mechanism according to claim 1, characterized in that said extracting mechanism comprises a sleeve (3) and a screw-out nut (2);

the sleeve (3) is coaxially sleeved on the screw rod (1), the lower end of the sleeve (3) is abutted to the transmission shell, the screw-out nut (2) is installed on the screw rod (1), the lower end face of the screw-out nut (2) is abutted to the top face of the sleeve (3), and the screw-out nut (2) can enable the bearing to move upwards and enter the sleeve (3).

4. The linear bearing dismounting mechanism according to claim 3, characterized in that a positioning ring is arranged in the inner hole at the upper end of the sleeve (3), and the sleeve (3) is sleeved on the screw rod (1) through the positioning ring.

5. Linear bearing dismounting mechanism according to claim 1, characterized in that said pulling mechanism comprises a pulling nut (6) and a pulling hammer (7);

one end of the pull-out nut (6) is connected with the screw rod (1) through threads, and the other end of the pull-out nut (6) is connected with the pull hammer.

6. Linear bearing dismounting mechanism according to claim 5, characterized in that the pull-out nut (6) comprises a screw and a nut fixedly arranged at the lower end of the screw, the nut is connected with the screw (1), and the screw is connected with the pull rod of the pull hammer (7) through threads.