CN209839104U

CN209839104U - Chain wheel

Info

Publication number: CN209839104U
Application number: CN201920633849.0U
Authority: CN
Inventors: 江洪; 江火平
Original assignee: Yuhuan Hongkun Machinery Co Ltd
Current assignee: Yuhuan Hongkun Machinery Co Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2019-12-24
Anticipated expiration: 2029-05-06

Abstract

The utility model provides a sprocket belongs to mechanical drive sprocket technical field. It has solved the problem that current rotation axis and sprocket assembly efficiency are low. This sprocket includes the sprocket main part and sets up the shaft hole at sprocket main part middle part, the sprocket main part is provided with inside bellied parallel key portion on the internal perisporium that is located shaft hole department, the both ends face of parallel key portion is parallel and level mutually with the both ends face of corresponding sprocket main part respectively, a tip of parallel key portion is provided with the extension portion of outside extension of axial, the through-hole has been seted up on the periphery wall that the parallel key portion is located extension portion department, be provided with spacing subassembly in the through-hole, spacing subassembly is by semi-circular spacing lug, it constitutes to touch piece and return spring, be provided with between spacing lug and the return spring and link firmly mutually and with the cylinder portion that the return spring is inconsistent with spacing lug, the opening part that the through-hole that is located extension portion internal perisporium department is provided with radial inside arch. The utility model has the advantages of assembly efficiency is high.

Description

Chain wheel

Technical Field

The utility model belongs to the technical field of mechanical drive sprocket, a sprocket is related to.

Background

The chain wheel is a mechanical element which is matched on a rotating shaft and transmits power by meshing and rotating with a chain, and is widely applied to mechanical transmission in the industries of chemical engineering, textile machinery, food processing, instruments, petroleum and the like.

When an existing chain wheel and a rotating shaft are installed, an accessory 'flat key' is required to be matched for use, the rotating shaft is prevented from moving after being installed on the chain wheel, the service life of the chain wheel and the service life of the rotating shaft are influenced, but when the flat key is installed on the rotating shaft, a groove for installing the flat key needs to be formed in the surface of the rotating shaft, the assembling efficiency of the rotating shaft and the chain wheel is influenced by the installation mode, and meanwhile, when the flat key is installed, the chain wheel and the rotating shaft are easily abraded.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a sprocket of assembly efficiency height and assembly wearing and tearing little, the time limit axis of rotation position during the assembly.

The purpose of the utility model can be realized by the following technical proposal: a chain wheel comprises a chain wheel main body and a shaft hole arranged in the middle of the chain wheel main body, and is characterized in that a flat key part protruding inwards is arranged on the inner peripheral wall of the chain wheel main body at the shaft hole, two end faces of the flat key part are respectively flush with two end faces of the corresponding chain wheel main body, an extension part extending outwards in the axial direction is arranged at one end part of the flat key part, a through hole extending towards the inner peripheral wall of the extension part in the axial direction and penetrating through the extension part is arranged on the outer peripheral wall of the flat key part at the extension part, a limiting component limiting the position of a rotating shaft is arranged in the through hole, the limiting component comprises a semicircular limiting lug capable of moving axially in the through hole, a contact block detachably connected with the extension part and a return spring of which two ends are respectively in contact with the end face of the corresponding limiting lug and the end face of the corresponding contact block, a cylindrical part fixedly connected with the limiting lug and in contact with the return spring is arranged between the limiting lug and the, the diameter of this cylinder portion is greater than the diameter of spacing lug, and the diameter of this cylinder portion is the same with the through-hole internal diameter, the opening part that the through-hole in the extension is located extension internal perisporium department be provided with radial inside arch and prevent the spacing ring portion that spacing lug drops.

In the above sprocket, the inner peripheral wall of the limiting ring part is provided with an arc-shaped conical surface matched with the limiting convex block.

In foretell sprocket, the middle part that cylinder portion lies in the terminal surface inconsistent with return spring be provided with the axial to the conflict piece protruding and stretch into the extension post one in the return spring, the conflict piece lie in the terminal surface middle part inconsistent with return spring be provided with the axial to the cylinder portion protruding and stretch into the extension post two in the return spring, the central line that extends post one and extension post two be located same water flat line, and extend post one and extend and leave the space between the two terminal surfaces in opposite directions of post.

In the chain wheel, the abutting block is detachably connected with the extending part through threaded fit.

Compared with the prior art, the sprocket is provided with a flat key part which protrudes inwards on the inner peripheral wall of the sprocket body at the shaft hole, one end part of the flat key part is provided with an extending part which extends outwards in the axial direction, the outer peripheral wall of the flat key part at the extending part is provided with a through hole which extends towards the inner peripheral wall of the extending part in the axial direction and penetrates through the extending part, a limiting component which limits the position of the rotating shaft is arranged in the through hole, the limiting component consists of a semicircular limiting lug which can move axially in the through hole, a contact block which is detachably connected with the extending part and a return spring of which the two ends are respectively contacted with the end surface of the corresponding limiting lug and the end surface of the corresponding contact block, a cylindrical part which is fixedly connected with the limiting lug and is contacted with the return spring is arranged between the limiting lug and the return spring, and a limiting ring part which protrudes inwards in the radial direction and prevents the limiting lug from, above-mentioned flat key portion's setting has improved the assembly efficiency of rotation axis and sprocket, wearing and tearing when reducing the assembly simultaneously, and the convenient rotation axis of setting of spacing subassembly is a location when the assembly, prevents that the rotation axis from assembling the first influence of crossing to use.

Drawings

FIG. 1 is a schematic top view of the present sprocket.

FIG. 2 is a cross-sectional structural schematic view of the present sprocket.

FIG. 3 is an enlarged view of circle A in the present sprocket.

In the drawings, 1, a sprocket body; 2. a shaft hole; 3. a flat key portion; 4. an extension part; 5. a through hole; 6. a limiting bump; 7. a contact block; 8. a return spring; 9. a cylindrical portion; 10. a limit ring part; 11. extending the first column; 12. and extending the second column.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the sprocket comprises a sprocket body 1 and a shaft hole 2 arranged in the middle of the sprocket body 1, wherein a flat key portion 3 protruding inwards is arranged on the inner peripheral wall of the sprocket body 1 at the shaft hole 2, two end faces of the flat key portion 3 are respectively flush with two end faces of the corresponding sprocket body 1, an extending portion 4 extending axially and outwards is arranged at one end of the flat key portion 3, a through hole 5 extending axially towards the inner peripheral wall of the extending portion 4 and penetrating through the extending portion 4 is arranged on the outer peripheral wall of the flat key portion 3 at the extending portion 4, a limiting component for limiting the position of a rotating shaft is arranged in the through hole 5, the limiting component is composed of a semicircular limiting lug 6 capable of moving axially in the through hole 5, a contact block 7 detachably connected with the extending portion 4, and a return spring 8 with two ends respectively abutting against the end face of the corresponding limiting lug 6 and the end face of the corresponding contact block 7, be provided with between spacing lug 6 and the return spring 8 and link firmly mutually and with spacing lug 6 with return spring 8 inconsistent cylinder portion 9, the diameter of cylinder portion 9 is greater than spacing lug 6's diameter, the diameter of cylinder portion 9 is the same with through-hole 5 internal diameter, the through-hole 5 in the extension portion 4 is located the opening part of extension portion 4 internal perisporium department and is provided with radial inside arch and prevents the spacing ring portion 10 that spacing lug 6 drops.

To be more specific, in order to reduce the abrasion of the limiting ring part 10 when contacting the limiting projection 6, the inner peripheral wall of the limiting ring part 10 is provided with an arc-shaped conical surface matched with the limiting projection 6.

Further saying in detail, in order to prevent return spring 8 crooked cheap, influence the return effect, the middle part that cylinder portion 9 is located the terminal surface that offsets with return spring 8 is provided with the axial to the extension post 11 protruding and stretching into in return spring 8 of conflict piece 7, conflict piece 7 is located the terminal surface middle part that offsets with return spring 8 and is provided with the axial to cylinder portion 9 protruding and stretch into the extension post two 12 in return spring 8, the central line that extends post 11 and extension post two 12 is located same water flat line, and leave the space between the terminal surface that extends post one and extension post two 12 facies.

In further detail, in order to facilitate the detachment of the abutting block 7, the abutting block 7 is detachably connected with the extending part 4 through threaded fit.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The chain wheel comprises a chain wheel main body (1) and a shaft hole (2) formed in the middle of the chain wheel main body (1), and is characterized in that a flat key portion (3) protruding inwards is arranged on the inner peripheral wall of the position, located in the shaft hole (2), of the chain wheel main body (1), two end faces of the flat key portion (3) are flush with two end faces of the corresponding chain wheel main body (1) respectively, an extending portion (4) extending outwards in the axial direction is arranged at one end portion of the flat key portion (3), a through hole (5) extending towards the inner peripheral wall of the extending portion (4) in the axial direction and penetrating through the extending portion (4) is formed in the outer peripheral wall of the position, located in the extending portion (4), of the flat key portion (3), a limiting assembly for limiting the position of a rotating shaft is arranged in the through hole (5), and comprises a semicircular limiting lug (6) capable of moving axially in the through hole (5), a contact block (7) detachably connected with the extending portion (4), and two ends of the semicircular limiting lug (6 The terminal surface and the corresponding return spring (8) that the terminal surface of the contact block (7) offsets form, spacing lug (6) and return spring (8) between be provided with and link firmly mutually with spacing lug (6) and with return spring (8) inconsistent cylinder portion (9), the diameter of this cylinder portion (9) is greater than the diameter of spacing lug (6), and the diameter of this cylinder portion (9) is the same with through-hole (5) internal diameter, opening part that through-hole (5) in extension portion (4) lie in extension portion (4) internal perisporium department be provided with radial inside arch and prevent spacing ring portion (10) that spacing lug (6) drop.

2. The sprocket as claimed in claim 1, wherein the inner peripheral wall of the limit ring part (10) is provided with an arc-shaped conical surface which is matched with the limit projection (6).

3. A sprocket as claimed in claim 1, wherein the middle of the end surface of the cylindrical portion (9) abutting against the return spring (8) is provided with a first extending column (11) protruding axially toward the contact block (7) and extending into the return spring (8), the middle of the end surface of the contact block (7) abutting against the return spring (8) is provided with a second extending column (12) protruding axially toward the cylindrical portion (9) and extending into the return spring (8), the center lines of the first extending column (11) and the second extending column (12) are located on the same horizontal line, and a gap is left between the opposite end surfaces of the first extending column and the second extending column (12).

4. A sprocket as claimed in claim 1, wherein said abutment block (7) is removably associated with the extension (4) by means of a screw-threaded engagement.