CN211137023U

CN211137023U - Chain dismounting device

Info

Publication number: CN211137023U
Application number: CN201921318155.4U
Authority: CN
Inventors: 陈冠君
Original assignee: Cixi City Kenli Axles Co ltd
Current assignee: Cixi City Kenli Axles Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-07-31
Anticipated expiration: 2029-08-14

Abstract

The utility model provides a chain dismounting device, includes the support, and processing recess in the middle of the support, support right side are fixed with the handle, and the processing of support left side lower part has spacing portion, and spacing portion inner wall forms the cavity with the recess inner wall, and the cavity shape matches with the chain link of chain, and support bottom processing through-hole I link up with the recess, and support top processing screw thread through-hole link up with the recess, installation ejector pin I in the screw thread through-hole, installation ejector pin II in the screw rod I of the I lower part of ejector pin, and II lower parts of ejector pin are. During disassembly, the chain link of the chain is placed at the bottom of the groove, the cavity formed by the limiting part and the groove is used for radially positioning the chain link, then the rotating rod is rotated to drive the ejector pin to move towards the chain, and finally the ejector pin ejects the chain pin out to be separated from the chain plate through the axial pressure of the ejector pin against the chain pin. The device is suitable for various chains with different speeds, can realize the positioning of the chains by utilizing the bracket body, and has simple structure and convenient use.

Description

Chain dismounting device

Technical Field

The invention relates to the technical field of mechanical tools, in particular to a chain dismounting device.

Background

The variable speed bicycle has the advantages that the frequency of the variable speed bicycle is increased day by day in daily life, the speed of the bicycle is higher, the number of the flywheels is more, the thickness of each flywheel is thinned, the gap is reduced, the corresponding chain is thinner, one speed chain corresponds to one speed and cannot be used in a mixed mode, and the chain of different speeds is the same except for different thicknesses and total lengths; in the field driving, the situation that the chain needs to be replaced or repaired can not be avoided, the groove of the support of the chain detacher in the current market can only accommodate the chain with certain fixed thickness, the universality is poor, and only axial positioning is carried out on the chain, the chain is easy to generate radial displacement, and the axial pressure center deviation is applied in the detaching process to cause the damage of the chain.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides a chain dismounting device.

In order to achieve the purpose, the invention provides a chain detacher which comprises a support, wherein a groove is formed in the middle of the support, a connecting part is formed in the right side of the support and is fixed with a handle, a limiting part is formed in the left lower part of the support, a cavity is formed by the inner wall of the limiting part and the inner wall of the groove, the shape of the cavity is matched with a chain link of a chain, a through hole I formed in the bottom of the support is communicated with the groove, a threaded through hole formed in the top of the support is communicated with the groove, a mandril I is arranged in the threaded through hole, a mandril II is arranged in a screw I at the lower part of the mandril I.

As a further improvement of the invention, a through hole II is radially processed at the head of the ejector rod I, and a rotating rod is arranged in the through hole II.

As a further improvement of the invention, the size of the screw I is matched with that of the threaded through hole, and a threaded hole is processed at the bottom of the screw I.

As a further improvement of the invention, a screw II on the upper part of the ejector rod II is matched with the threaded hole.

As a further improvement of the invention, the central axes of the through hole I and the threaded through hole are coincident.

The invention has the beneficial effects that:

1. the chain of different thickness can be placed in the recess of device support and dismantle, and the commonality is good.

2. The cavity space formed by the limiting part of the support and the inner wall of the groove radially limits the chain, so that the dismounting force point of the thimble on the pin shaft is ensured to be just on the central axis of the pin shaft, the pin shaft cannot be damaged due to the inclination of the pin shaft in the dismounting process, and the pin shaft can be easily ejected out.

Drawings

FIG. 1 is a front view of a chain detacher of the present invention;

FIG. 2 is a detail view of the holder of the component 1;

FIG. 3 is a sectional view taken along line A in FIG. 2;

FIG. 4 is a schematic view of the assembly and disassembly of the bracket of the component 1 and the chain of the component 6;

FIG. 5 is a part view of the ram I of the component 2;

fig. 6 is a part view of the ram ii of the component 3.

In the figure: 1. a support; 11. a groove; 12. a through hole I; 13. a threaded through hole; 14. a limiting part; 141. a cavity; 15. a connecting portion; 2. a mandril I; 21. a through hole II; 22. a screw I; 221. a threaded hole; 3. a mandril II; 31. a screw II; 32. a thimble; 4. rotating the rod; 5. a handle; 6. and a chain.

Detailed Description

As shown in figure 1, the chain detacher comprises a bracket 1, a groove 11 is processed in the middle of the bracket 1, a connecting part 15 is processed on the right side of the bracket 1, the connecting part 15 is fixed with a handle 5, a limiting part 14 is processed on the left lower part of the bracket 1, the inner wall of the limiting part 14 and the inner wall of the groove 11 form a cavity 141, the shape of the cavity 141 is matched with a chain link of a chain 6, a through hole I12 processed on the bottom of the bracket 1 is communicated with the groove 11, a threaded through hole 13 processed on the top of the bracket 1 is communicated with the groove 11, the central axes of the through hole I12 and the threaded through hole 13 are coincident, a mandril I2 is installed in the threaded through hole 13, a through hole II 21 is radially processed on the head of the mandril I2, a rotating rod 4 is installed in the through hole II 21, a screw I22 on the lower part of the mandril I2 is matched with the size of the threaded through, the lower part of the ejector rod II 3 is provided with an ejector pin 32.

Chains with different thicknesses can be placed in the grooves of the device bracket for disassembly, so that the device bracket has good universality; the cavity space formed by the limiting part of the support and the inner wall of the groove radially limits the chain, so that the dismounting force point of the thimble on the pin shaft is ensured to be just on the central axis of the pin shaft, the pin shaft cannot be damaged due to the inclination of the pin shaft in the dismounting process, and the pin shaft can be easily ejected out.

In particular use, the invention will be described with reference to the accompanying drawings for the convenience of understanding;

the bicycle chain is composed of small chain links, each chain link is composed of a chain pin, a rolling ring and a chain plate, the chain on bicycles with different speeds only has the difference of thickness and total length, and other sizes of each chain link are the same; during the dismantlement, place chain link department of chain in the cavity that spacing portion and recess inner wall formed (see fig. 4), cavity space and chain link shape phase-match, make the chain link can not take place the displacement in radial department, rotate the swing arm behind the fixed chain link, the rotation of swing arm makes I of ejector pin I along the downstream of screw thread through-hole, ejector pin II of I bottom of ejector pin is along with it downward, the thimble of II lower parts of ejector pin just faces the chain pin center of chain link, through the axial pressure of top to the chain pin, final thimble is ejecting chain pin out chain link, make chain pin and link joint separation, the dismantlement of completion chain, the chain of different thickness all can be put into the cavity and is dismantled after the location.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a chain breaker, includes support (1), processing fluted (11) in the middle of support (1), support (1) right side processing connecting portion (15), connecting portion (15) are fixed with handle (5), its characterized in that: the utility model discloses a chain link of support (1), including support (1), spacing portion (14), recess (11), cavity (141) shape and chain (6), support (1) bottom processing through-hole I (12) with recess (11) link up, support (1) top processing screw thread through-hole (13) with recess (11) link up, installation ejector pin I (2) in screw thread through-hole (13), installation ejector pin II (3) in screw rod I (22) of ejector pin I (2) lower part, ejector pin II (3) lower part is thimble (32).

2. A chain disconnector according to claim 1, characterized in that: the head of the ejector rod I (2) is radially provided with a through hole II (21), and a rotating rod (4) is arranged in the through hole II (21).

3. A chain disconnector according to claim 1, characterized in that: screw rod I (22) size matching screw thread through-hole (13), screw rod I (22) bottom processing has screw hole (221).

4. A chain disconnector according to claim 3, characterized in that: and the screw II (31) at the upper part of the ejector rod II (3) is matched with the threaded hole (221).

5. A chain disconnector according to claim 1, characterized in that: the central axis of the through hole I (12) is coincident with the central axis of the threaded through hole (13).