CN217784156U

CN217784156U - Assembled noise reduction chain wheel

Info

Publication number: CN217784156U
Application number: CN202221972110.0U
Authority: CN
Inventors: 陈复之; 李孜
Original assignee: Miba Precision Components China Co ltd
Current assignee: Miba Precision Components China Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-11
Anticipated expiration: 2032-07-29

Abstract

The utility model belongs to the technical field of the vice noise reduction of sprocket, concretely relates to sprocket of making an uproar falls in assembled. The utility model provides an assembled noise reduction chain wheel, which comprises a wheel body and an elastic ring assembled on the periphery of the wheel body; the wheel body comprises a wheel framework, a wheel tooth base surrounding the periphery of the wheel framework and wheel teeth arranged on the periphery of the wheel tooth base in the circumferential direction. Annular axial stopping parts are arranged on the periphery of the wheel framework and positioned on two sides of the wheel tooth base, and a plurality of circumferential stopping positions are circumferentially distributed on the axial stopping parts. The elastic ring is hooped on the periphery of the wheel framework in an interference fit manner, and the elastic ring is abutted with the wheel tooth base and the axial stopping part so as to limit the axial sliding of the elastic ring. And a plurality of circumferential blocking matching positions are circumferentially distributed on the elastic ring and are in concave-convex matching with the circumferential blocking positions so as to limit the circumferential sliding of the elastic ring. This sprocket of making an uproar falls in assembled can enough guarantee the assembly reliably, can avoid again in the sprocket surface normal position parcel rubber arouse a series of problems.

Description

Assembled noise reduction chain wheel

Technical Field

The utility model belongs to the technical field of making an uproar falls in the sprocket pair, concretely relates to assembled sprocket of making an uproar falls.

Background

The chain wheel pair is a transmission structure with a chain matched with a chain wheel, and is widely applied to various mechanical structures. In the transmission process of the chain wheel pair, when the chain roller on the chain is matched with the chain wheel teeth of the chain wheel, the chain roller falls into the bottom of the teeth of the chain wheel to generate certain impact, and particularly when the chain wheel pair runs at a high speed, the impact frequency of the chain roller and the bottom of the teeth of the chain wheel is high, the intensity of the impact is high, and obvious noise is generated.

In order to suppress noise generated when the sprocket pair operates, it is currently the mainstream to coat rubber at the positions along the outer periphery of the sprocket and on both sides of the teeth, and the impact force between the chain roller and the bottom of the teeth is reduced by the cushioning effect of the elastic material, thereby reducing the noise. In order to ensure that the rubber and the chain wheel have good binding force, the rubber is wrapped in situ by a mould glue injection method and is vulcanized and molded on the surface of the chain wheel at present. But the in-situ vulcanization process has great process difficulty, complex operation and higher cost. Particularly, when the mold is abutted to the wheel body, the tightness and accuracy are not easy to control, so that the quality problems of flash, precision deviation and the like are easy to occur during rubber injection. Therefore, an improved scheme is provided in patent CN212868359U, and a sprocket wheel body is subjected to structure optimization to be easily and accurately matched with a mold, so that the quality defects that burrs and precision deviation are easily generated during rubber injection are effectively overcome.

However, although the improvement scheme can solve the quality problem of the noise reduction chain wheel coated with rubber, the problems of complex operation, high difficulty in process control, high production cost and the like of the in-situ vulcanization process cannot be fundamentally solved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides an assembly type noise reduction chain wheel.

The utility model provides an assembled noise reduction chain wheel, which comprises a wheel body and an elastic ring assembled at the periphery of the wheel body; the wheel body includes wheel skeleton, encircles the teeth of a cogwheel basis at wheel skeleton periphery and the circumferencial direction arranges in a plurality of teeth of a cogwheel basis periphery.

Annular axial stopping parts are arranged on the periphery of the wheel framework and positioned on two sides of the wheel tooth base, and a plurality of circumferential stopping positions are circumferentially distributed on the axial stopping parts.

The elastic ring is hooped on the periphery of the wheel framework in an interference fit manner, and the elastic ring is abutted with the wheel tooth base and the axial stopping part so as to limit the axial sliding of the elastic ring.

And a plurality of circumferential blocking matching positions are circumferentially distributed on the elastic ring and are in concave-convex matching with the circumferential blocking positions so as to limit the circumferential sliding of the elastic ring.

Furthermore, in the assembled noise reduction chain wheel, the axial stopping part is a limiting convex ring connected to the periphery of the wheel framework, and a clamping circumferential groove is formed in an area at intervals between the limiting convex ring and the gear tooth base; at least one part of the elastic ring is embedded in the clamping peripheral groove.

Furthermore, in the assembled noise reduction chain wheel, the circumferential stopping positions are recessed positions which are annularly arrayed on the periphery of the limiting convex ring; the elastic ring is step-shaped and comprises a first step embedded in the clamping circumferential groove and a second step abutted against the periphery of the limiting convex ring; the circumferential stop matching positions are raised positions distributed on the inner circumference of the second step.

Furthermore, in the assembled noise reduction chain wheel, the area between the adjacent concave positions on the periphery of the limiting convex ring is in an arc convex shape and is in smooth transition connection with the concave positions on the two sides; correspondingly, the area between the adjacent convex positions on the inner periphery of the second step is in a circular arc concave shape and is connected with the convex positions on the two sides in a smooth transition mode.

Furthermore, in the above-mentioned assembled noise reduction sprocket, the axial stopper is a circumferential slope extending from the root of the sprocket base to both sides; the inner periphery of the elastic ring inclines and is abutted with the circumferential slope.

Further, in the above-mentioned noise reduction sprocket, the circumferential stopping positions are a set of notches distributed around the circumferential slope surface, and the circumferential stopping engagement positions are a set of protrusions distributed on the inner periphery of the elastic ring.

Furthermore, in the above-mentioned assembled sprocket of making an uproar that falls, still coat the gluing agent on the contact surface of wheel body and elastic ring.

Further, in the above-mentioned assembled noise reduction sprocket, the outer periphery of the elastic ring is in a continuous corrugated shape.

Has the beneficial effects that: the utility model provides a sprocket of making an uproar falls in assembled sets up the elastic ring in the wheel body periphery, when chain and sprocket cooperation operation, can avoid the chain roller directly to take place the striking with the teeth of a cogwheel bottom, therefore can show noise reduction. The noise reduction chain wheel adopts an assembly type structure, axial stopping parts are arranged on two sides of a gear tooth base, circumferential stopping positions are arranged on the axial stopping parts, and the axial stopping parts are matched with elastic rings which are matched in shape and have a holding effect, so that the elastic rings can be reliably assembled on the wheel body, and larger axial and circumferential shearing force can be borne without sliding. Through this kind of sprocket of making an uproar falls in assembled, fundamentally has avoided adopting mould injecting glue method with rubber normal position parcel and vulcanization moulding at the loaded down with trivial details process on sprocket surface and the quality defect that produces from this, the elastic ring can prepare alone, not only easily mass production, also easily improves the size precision and the shaping quality of elastic ring moreover.

Drawings

Fig. 1 is a schematic structural view of a fabricated noise reduction sprocket according to embodiment 1.

Fig. 2 is a schematic view of the wheel body according to embodiment 1.

FIG. 3 is a cross-sectional schematic view of the fabricated noise reduction sprocket of embodiment 1.

Fig. 4 is a schematic view of the elastic ring according to embodiment 1.

FIG. 5 is a schematic structural view of the fabricated noise reduction sprocket according to embodiment 2.

Fig. 6 is a schematic view of the wheel body according to embodiment 2.

FIG. 7 is a cross-sectional schematic view of the fabricated noise reduction sprocket of embodiment 2.

Fig. 8 is a schematic view of the elastic ring according to embodiment 2.

In the figure, a wheel body 1, an elastic ring 2, a wheel frame 11, a wheel tooth base 12, a plurality of wheel teeth 13, an axial stop portion 14, a circumferential stop position 141, and a circumferential stop engagement position 21.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to illustrate the technical solutions of the present invention more clearly and are not to be construed as a limitation.

Unless defined otherwise, technical or scientific terms used herein should be understood as having the ordinary meaning as understood by those of ordinary skill in the art. The use of "first," "second," and the like in the description of the invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and the like are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 1

The assembled noise reduction sprocket shown in fig. 1 comprises a sprocket body 1 and an elastic ring 2 assembled on the periphery of the sprocket body 1. The wheel body 1 can be manufactured by adopting methods such as powder metallurgy, machining and the like, and the elastic ring 2 can be made of elastic materials such as rubber, silica gel and the like. As shown in fig. 2, the wheel body 1 includes a wheel frame 11, a gear tooth base 12 surrounding the outer periphery of the wheel frame 11, and a plurality of gear teeth 13 arranged on the outer periphery of the gear tooth base 12 in the circumferential direction. Because wheel body 1 periphery is provided with elastic ring 2, when chain and sprocket cooperation operation, the link joint on the chain earlier with elastic ring 2 contacts, elastic ring 2 is extruded and is produced certain deformation back, the chain roller on the chain contacts with wheel body 1 again to avoided chain roller and the direct emergence striking in teeth of a cogwheel 13 bottom, therefore can show the noise reduction.

Annular axial stopping parts 14 are arranged on the periphery of the wheel framework 11 and located on two sides of the wheel tooth base 12, a plurality of circumferential stopping positions 141 are circumferentially distributed on the axial stopping parts 14, and the circumferential stopping positions 141 are preferably distributed in an equal included angle mode, so that the elastic ring 2 is convenient to assemble.

The elastic ring 2 is preferably hooped on the periphery of the wheel frame 11 in an interference fit mode, and the elastic ring 2 applies certain holding force to the wheel frame 11 to prevent the elastic ring 2 from loosening with the wheel frame 11.

The elastic rings 2 are assembled on two sides of the gear tooth base 12, and the elastic rings 2 are abutted with the gear tooth base 12 and the axial stopping part 14, so that the axial sliding of the elastic rings 2 can be effectively limited. A plurality of circumferential stop matching positions 21 are circumferentially distributed on the elastic ring 2, the circumferential stop matching positions 21 are distributed and matched according to the distribution of the circumferential stop positions 141, and the circumferential stop matching positions 21 are in concave-convex fit with the circumferential stop positions 141 so as to limit the circumferential sliding of the elastic ring 2.

Specifically, as shown in fig. 2 and 3, the axial stop portion 14 in this embodiment is a limit protruding ring connected to the outer periphery of the wheel frame 11, and a clamping circumferential groove is formed in an area spaced between the limit protruding ring and the gear tooth base 12; a part of the elastic ring 2 is embedded in the clamping circumferential groove. The circumferential stopping positions 141 are recessed positions arranged on the periphery of the limiting convex ring in an annular array. As shown in fig. 4, the elastic ring 2 is step-shaped and comprises a first step embedded in the clamping circumferential groove and a second step abutted against the periphery of the limiting convex ring; the circumferential stop matching positions 21 are protruding positions distributed on the inner circumference of the second step.

As shown in fig. 2, the area between adjacent concave positions on the periphery of the limit convex ring is in a circular arc convex shape and is in smooth transition connection with the concave positions on two sides; correspondingly, as shown in fig. 4, the area between adjacent protruding positions on the inner periphery of the second step is in a circular arc concave shape and is in smooth transition connection with the protruding positions on both sides. Above-mentioned spacing bulge loop and the cooperation of elastic ring 2 can prevent to take place the circumference each other and slide, can disperse the circumference shearing force more evenly simultaneously again, avoids stress concentration and leads to elastic ring 2 to take place to destroy.

As shown in fig. 1 and 4, the outer circumference of the elastic ring 2 is continuously corrugated, and the gear teeth 13 correspond to one corrugation period. In the process of matching the chain and the chain wheel, the continuous corrugated elastic ring 2 can enable the extrusion force between the chain plate and the elastic ring 2 to be in a smooth change process, so that the impact caused by sudden change of stress is avoided, the service life of the elastic ring 2 is prolonged, and the noise is further reduced.

According to the assembled noise reduction sprocket, the axial stopping portions 14 are arranged on the two sides of the gear tooth base 12, the circumferential stopping positions 141 are arranged on the axial stopping portions 14, and the elastic ring 2 which is matched in shape and has a holding effect is matched with the axial stopping portions 14, so that the elastic ring 2 can be reliably assembled on the sprocket body 1, and can bear large axial and circumferential shearing force without slippage. Through this kind of assembled sprocket of making an uproar that falls, fundamentally has avoided adopting the complicated process that mould injecting glue method wrapped up the rubber normal position and vulcanize the shaping on the sprocket surface and the quality defect who produces from this, and elastic ring 2 can prepare alone, not only easily mass production, also easily improves elastic ring 2's dimensional accuracy and shaping quality moreover.

Example 2

The structure of the fabricated noise reduction sprocket provided by the embodiment is shown in fig. 5.

The assembled noise reduction sprocket provided in this embodiment is different from the first aspect of embodiment 1 in the connection between the wheel body 1 and the elastic ring 2. Specifically, the wheel body 1 and the elastic ring 2 are held together through interference fit, and an adhesive is further coated on a contact surface between the wheel body 1 and the elastic ring 2, so that the shearing force bearable between the wheel body 1 and the elastic ring 2 can be further improved.

The assembled noise reduction sprocket provided in the present embodiment differs from the second aspect of embodiment 1 in the engagement portion between the body 1 and the elastic ring 2. As shown in fig. 6, 7 and 8, in the present embodiment, the axial stop portion 14 is a circumferential slope extending from the root of the gear tooth base 12 to two sides; the inner periphery of the elastic ring 2 inclines and is abutted with the circumferential slope. In this embodiment, the circumferential stopping positions 141 are a set of notches distributed around the circumferential slope surface, and the circumferential stopping matching positions 21 are a set of protrusions distributed on the inner circumference of the elastic ring 2.

The assembled noise reduction sprocket provided by the present embodiment is identical in structure to embodiment 1 in other respects, and therefore, description thereof will not be repeated.

The above embodiments are exemplary and are intended to illustrate the technical concept and features of the present invention so that those skilled in the art can understand the contents of the present invention and implement the present invention, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a sprocket of making an uproar falls in assembled which characterized in that: comprises a wheel body (1) and an elastic ring (2) assembled on the periphery of the wheel body (1); the wheel body (1) comprises a wheel framework (11), a gear tooth base (12) surrounding the periphery of the wheel framework (11), and a plurality of gear teeth (13) arranged on the periphery of the gear tooth base (12) in the circumferential direction;

annular axial stopping parts (14) are arranged on the periphery of the wheel framework (11) and positioned on two sides of the wheel tooth base (12), and a plurality of circumferential stopping positions (141) are circumferentially distributed on the axial stopping parts (14);

the elastic ring (2) is hooped on the periphery of the wheel framework (11) in an interference fit manner, and the elastic ring (2) is abutted with the wheel tooth base (12) and the axial blocking part (14) so as to limit the axial sliding of the elastic ring (2);

a plurality of circumferential stopping matching positions (21) are further circumferentially distributed on the elastic ring (2), and the circumferential stopping matching positions (21) are in concave-convex matching with the circumferential stopping positions (141) to limit circumferential sliding of the elastic ring (2).

2. The fabricated noise reduction sprocket of claim 1, wherein: the axial stop part (14) is a limiting convex ring connected to the periphery of the wheel framework (11), and a clamping circumferential groove is formed in an area spaced between the limiting convex ring and the wheel tooth base (12); at least one part of the elastic ring (2) is embedded in the clamping peripheral groove.

3. The fabricated noise reduction sprocket of claim 2, wherein: the circumferential stopping positions (141) are recessed positions arranged on the periphery of the limiting convex ring in an annular array manner; the elastic ring (2) is step-shaped and comprises a first step embedded into the clamping peripheral groove and a second step abutted against the periphery of the limiting convex ring; the circumferential stop matching positions (21) are protruding positions distributed on the inner periphery of the second step.

4. The fabricated noise reduction sprocket of claim 3, wherein: the area between the adjacent concave positions on the periphery of the limiting convex ring is in an arc convex shape and is in smooth transition connection with the concave positions on the two sides; correspondingly, the area between the adjacent convex positions on the inner periphery of the second step is in a circular arc concave shape and is in smooth transition connection with the convex positions on the two sides.

5. The fabricated noise reducing sprocket of claim 1, wherein: the axial stop part (14) is a circumferential slope which expands and extends from the root of the gear tooth base (12) to two sides; the inner periphery of the elastic ring (2) inclines and is abutted to the circumferential slope.

6. The fabricated noise reducing sprocket of claim 5, wherein: the circumferential stopping positions (141) are a group of notches distributed on the circumferential slope surface in a surrounding mode, and the circumferential stopping matching positions (21) are a group of convex hulls distributed on the inner circumference of the elastic ring (2).

7. The fabricated noise reduction sprocket as set forth in any one of claims 1 to 6, wherein: the contact surface of the wheel body (1) and the elastic ring (2) is also coated with adhesive.

8. The fabricated noise reduction sprocket of claim 1, wherein: the periphery of the elastic ring (2) is in a continuous corrugated shape.