CN214838249U

CN214838249U - Timing sprocket

Info

Publication number: CN214838249U
Application number: CN202121404975.2U
Authority: CN
Inventors: 陈坤龙; 陈贤丰; 周飞; 俞永传
Original assignee: Yuhuan Kaili Auto Parts Co ltd
Current assignee: Yuhuan Kaili Auto Parts Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-11-23
Anticipated expiration: 2031-06-24

Abstract

The utility model provides a timing sprocket belongs to engine accessories technical field. It has solved the easy wearing and tearing of current sprocket body and location axle relative rotation, the relatively poor problem of structural stability. This timing sprocket includes the sprocket body, the outward flange of sprocket body has the sprocket tooth along the circumferencial direction equipartition of sprocket body, and this sprocket tooth is used for the meshing to connect the roller chain, the connecting hole that same axial set up is seted up to the middle part position of sprocket body, and the connecting hole of this sprocket body is used for wearing to establish the location axle, sprocket body and location axle relative rotation cooperation, be provided with on the sprocket body when the sprocket body with location axle relative rotation cooperation, can prevent the supplementary rotatory cooperation device of the connecting hole wearing and tearing of sprocket body. The utility model discloses a set up the swivel wear that the movable sleeve can effectively prevent sprocket body self, be used for the lubrication of movable sleeve through setting up arc oil storage tank, lubricant bowl, avoid relative wearing and tearing, structural stability is high, long service life.

Description

Timing sprocket

Technical Field

The utility model belongs to the technical field of the engine accessories, a timing sprocket is related to.

Background

The timing chain wheel plays a role of a bridge in the engine and transmits force to corresponding parts under the drive of the crankshaft.

For example, chinese patent literature discloses a timing sprocket [ application No.: 202021819313.7, respectively; the authorization notice number is: CN212774449U ], which comprises a sprocket body, wherein the outer edge of the sprocket body is distributed with sprocket teeth at intervals along the circumferential direction of the sprocket body, the sprocket teeth are used for connecting with the roller chain cog, the middle part of the sprocket body is provided with a connecting hole arranged in the same axial direction, and the connecting hole is used for being axially assembled with a positioning shaft for positioning and supporting.

The protective structure who does not set up rotatory wearing and tearing between this sprocket body and the location axle in foretell timing sprocket, long-term the use, this sprocket body and location axle relative rotation wear and tear easily, cause sprocket body and location axle normal running fit shakiness, the sprocket body appears rocking easily, results in the power transmission of sprocket to receive the influence, and structural stability is poor, and life is short.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, can effectively prevent sprocket body and location axle cooperation wearing and tearing, structural stability is high, long service life's timing sprocket.

The purpose of the utility model can be realized by the following technical proposal: a timing sprocket comprises a sprocket body, sprocket teeth are uniformly distributed on the outer edge of the sprocket body along the circumferential direction of the sprocket body and are used for being meshed with a roller chain, connecting holes which are arranged in the same axial direction are formed in the middle of the sprocket body, the connecting holes of the sprocket body are used for penetrating through a positioning shaft, and the sprocket body and the positioning shaft are in relative rotation fit; the auxiliary rotating matching device comprises a movable assembly, the movable assembly is detachably assembled in a connecting hole of the chain wheel body and is used for being movably assembled with the positioning shaft in the same axial direction, and a lubricating structure used for lubricating the chain wheel body, the movable assembly and the positioning shaft is arranged between the movable assembly and the chain wheel body.

The timing chain wheel is provided with the movable assembly on the chain wheel body, the rotating abrasion of the chain wheel body is solved through the movable fit of the movable assembly and the positioning shaft, and the lubricating structure is used for lubricating the movable assembly and the positioning shaft in the movable fit manner, so that the relative abrasion of the rotating fit can be effectively prevented, the structural stability is high, and the service life is long; when the chain wheel is used for a long time, the movable assembly can be replaced even if the movable assembly is slightly abraded, so that the use cost for replacing the chain wheel body is greatly reduced.

In foretell timing sprocket, the movable assembly include the loose collar and have the movable sleeve that turns up the edge outward, the movable sleeve with the axial wear to locate the connecting hole of sprocket body and stretch out from the connecting hole of sprocket body, the right-hand member terminal surface of the edge that turns up of movable sleeve and sprocket body support and lean on the cooperation, the loose collar cover establish fix the end that stretches out of movable sleeve, and the left end terminal surface of this loose collar and sprocket body supports and lean on the cooperation. The purpose of setting up like this is that the convenience movable assembly assembles on the sprocket body, stable in structure.

In foretell timing sprocket, lubricating structure include the arc oil storage tank of seting up on the sprocket body, the arc oil storage tank run through sprocket body left end terminal surface, right-hand member terminal surface and lie in the movable sleeve turn up along, between the loose ring, the movable sleeve on have the lubricating hole that is radial setting, when the movable sleeve and sprocket body relative rotation, lubricating oil can be used for the lubrication of movable sleeve, location axle through the fitting surface flow direction lubricating hole of movable sleeve and sprocket body in this arc oil storage tank. The purpose that sets up like this can effectual reduction movable sleeve and the sprocket body between relative rotatory wearing and tearing, structural stability is high.

In foretell timing sprocket, the middle part position of the right-hand member terminal surface of sprocket body annular boss has, the arc oil storage tank be located annular boss, the centre of a circle of the connecting hole of sprocket body and the centre of a circle of annular boss overlap, the centre of a circle of annular boss and the centre of a circle of arc oil storage tank overlap. The purpose that sets up like this is the mechanical strength who increases the arc oil storage tank position of sprocket body, ensures sprocket body stable drive.

In the timing sprocket, the size of the outward turning edge of the movable sleeve is matched with the size of the table top of the annular boss of the sprocket body, and the outward turning edge of the movable sleeve is abutted against the table top of the annular boss of the sprocket body. The purpose that sets up like this can effectively avoid the movable sleeve and take place the assembly with other accessories and interfere, ensures assembly space, stable in structure.

In the above timing sprocket, the movable ring is coaxially sleeved at the extending end of the movable sleeve, and a pin shaft which is radially fixed is arranged between the movable ring and the movable sleeve, and the pin shaft is symmetrically distributed on the movable ring and fixes the movable ring on the movable sleeve. The purpose of setting up like this can effectively prevent the effective connection of movable sleeve and loose collar, prevents that both from connecting the separation, and structural connection is stable.

In the timing chain wheel, the axial sunk grooves are circumferentially distributed at intervals on the end face of the right end of the chain wheel body, the through holes are formed in the bottoms of the sunk grooves, and the chain wheel body is fixed through the through holes. The chain wheel body is fixedly connected with the crankshaft through the through holes, the four through holes are circumferentially distributed at intervals, the connection stress is uniform, the connection is stable, and the service life is long.

Compared with the prior art, the timing chain wheel has the advantages that: structural design is reasonable, simple, can effectively prevent the rotatory wearing and tearing of sprocket body self through setting up the movable sleeve, is used for the lubrication of movable sleeve through setting up arc oil storage tank, moist oil hole, avoids relative wearing and tearing, and structural stability is high, long service life.

Drawings

FIG. 1 is a front view of a sprocket body of the timing sprocket.

Fig. 2 is a schematic sectional view in the direction of a-a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the drawings, 1, a sprocket body; 2. a sprocket tooth; 3. connecting holes; 4. a movable ring; 5. turning out the edges; 6. a movable sleeve; 7. an arc-shaped oil storage tank; 8. an oil lubrication hole; 9. an annular boss; 10. a pin shaft; 11. sinking a groove; 12. a through hole.

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 timing sprocket mainly comprises a sprocket body 1, sprocket teeth 2 are uniformly distributed on the outer edge of the sprocket body 1 along the circumferential direction of the sprocket body 1, the sprocket teeth 2 are used for being meshed with a roller chain, connecting holes 3 arranged in the same axial direction are formed in the middle of the sprocket body 1, the connecting holes 3 of the sprocket body 1 are used for penetrating positioning shafts, the sprocket body 1 and the positioning shafts are in relative rotation fit, and an auxiliary rotation fit device capable of preventing the connecting holes 3 of the sprocket body 1 from being worn when the sprocket body 1 is in relative rotation fit with the positioning shafts is arranged on the sprocket body 1; in practical manufacturing, the specific implementation of the auxiliary rotating matching device is as follows: the movable assembly is mainly composed of a movable assembly, the movable assembly is detachably assembled in a connecting hole 3 of a chain wheel body 1 and is used for being movably assembled with a positioning shaft in the same axial direction, when the movable assembly is actually applied, the movable assembly mainly comprises a movable ring 4 and a movable sleeve 6 with an outward turning edge 5, the movable sleeve 6 coaxially penetrates through the connecting hole 3 of the chain wheel body 1 and extends out of the connecting hole 3 of the chain wheel body 1, the outward turning edge 5 of the movable sleeve 6 is abutted and matched with the end face of the right end of the chain wheel body 1, the movable ring 4 is sleeved and fixed at the extending end of the movable sleeve 6, and the movable ring 4 is abutted and matched with the end face of the left end of the chain wheel body 1; specifically, the method comprises the following steps: the movable ring 4 is coaxially sleeved at the extending end of the movable sleeve 6, a pin shaft 10 which is radially fixed is arranged between the movable ring 4 and the movable sleeve 6, and the pin shafts 10 are symmetrically distributed on the movable ring 4 and fix the movable ring 4 on the movable sleeve 6.

During actual manufacturing, a lubricating structure for lubricating the chain wheel body 1, the movable assembly and the positioning shaft is arranged between the movable assembly and the chain wheel body 1; this lubricating structure mainly does: the chain wheel comprises a chain wheel body 1, and is characterized in that an arc-shaped oil storage tank 7 is formed in the chain wheel body 1, the left end face and the right end face of the chain wheel body 1 are penetrated through the arc-shaped oil storage tank 7 and are positioned between an outward turning edge 5 and a movable ring 4 of a movable sleeve 6, the movable sleeve 6 is provided with an oil lubrication hole 8 which is radially arranged, and when the movable sleeve 6 and the chain wheel body 1 rotate relatively, lubricating oil in the arc-shaped oil storage tank 7 flows to the oil lubrication hole 8 through matching surfaces of the movable sleeve 6 and the chain wheel body 1 and is used for lubricating the movable sleeve 6 and a positioning shaft; in actual manufacturing, an annular boss 9 is arranged in the middle of the right end face of the sprocket body 1, the arc-shaped oil storage tank 7 is positioned on the annular boss 9, the circle center of the connecting hole 3 of the sprocket body 1 is overlapped with the circle center of the annular boss 9, and the circle center of the annular boss 9 is overlapped with the circle center of the arc-shaped oil storage tank 7; during actual manufacturing, the size of the outward turning edge 5 of the movable sleeve 6 is matched with the size of the table top of the annular boss 9 of the chain wheel body 1, and the outward turning edge 5 of the movable sleeve 6 abuts against the table top of the annular boss 9 of the chain wheel body 1.

During actual manufacturing, axially-arranged sunk grooves 11 are circumferentially distributed at intervals on the end face of the right end of the chain wheel body 1, through holes 12 are formed in the bottoms of the sunk grooves 11, and the chain wheel body 1 is fixed through the through holes 12.

Those not described in detail in this specification are within the skill of the art. 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. A timing sprocket comprises a sprocket body (1), sprocket teeth (2) are uniformly distributed on the outer edge of the sprocket body (1) along the circumferential direction of the sprocket body (1), the sprocket teeth (2) are used for being meshed with a roller chain, connecting holes (3) which are arranged in the same axial direction are formed in the middle of the sprocket body (1), the connecting holes (3) of the sprocket body (1) are used for penetrating positioning shafts, and the sprocket body (1) and the positioning shafts are in relative rotation fit, and the timing sprocket is characterized in that an auxiliary rotation fit device capable of preventing the connecting holes (3) of the sprocket body (1) from being worn when the sprocket body (1) is in relative rotation fit with the positioning shafts is arranged on the sprocket body (1); the auxiliary rotating matching device comprises a movable assembly, the movable assembly is detachably assembled in a connecting hole (3) of the chain wheel body (1) and is used for being movably assembled with the positioning shaft in the same axial direction, and a lubricating structure used for lubricating the chain wheel body (1), the movable assembly and the positioning shaft is arranged between the movable assembly and the chain wheel body (1).

2. The timing sprocket wheel as claimed in claim 1, wherein the movable assembly comprises a movable ring (4) and a movable sleeve (6) with an outward-turned edge (5), the movable sleeve (6) coaxially penetrates through the connecting hole (3) of the sprocket wheel body (1) and extends out of the connecting hole (3) of the sprocket wheel body (1), the outward-turned edge (5) of the movable sleeve (6) is in abutting fit with the right end face of the sprocket wheel body (1), the movable ring (4) is sleeved and fixed at the extending end of the movable sleeve (6), and the left end face of the movable ring (4) is in abutting fit with the left end face of the sprocket wheel body (1).

3. The timing sprocket as recited in claim 2, wherein said lubricating structure comprises an arc oil storage groove (7) formed in the sprocket body (1), said arc oil storage groove (7) penetrates the left end face and the right end face of the sprocket body (1) and is located between the outward turning edge (5) and the movable ring (4) of the movable sleeve (6), said movable sleeve (6) is provided with lubricating holes (8) arranged in radial direction, when the movable sleeve (6) and the sprocket body (1) rotate relatively, the lubricating oil in the arc oil storage groove (7) can flow to the lubricating holes (8) through the matching surfaces of the movable sleeve (6) and the sprocket body (1) for lubricating the movable sleeve (6) and the positioning shaft.

4. The timing sprocket as claimed in claim 3, wherein the sprocket body (1) has an annular boss (9) at the middle of the right end face, the arc oil storage groove (7) is located on the annular boss (9), the center of the connecting hole (3) of the sprocket body (1) overlaps the center of the annular boss (9), and the center of the annular boss (9) overlaps the center of the arc oil storage groove (7).

5. A timing sprocket as claimed in claim 4, wherein the size of the outward turned edge (5) of the movable sleeve (6) is adapted to the size of the land of the annular boss (9) of the sprocket body (1), and the outward turned edge (5) of the movable sleeve (6) abuts against the land of the annular boss (9) of the sprocket body (1).

6. The timing sprocket as recited in claim 5, wherein said movable ring (4) is coaxially fitted over the extended end of the movable sleeve (6), and radially fixed pins (10) are disposed between the movable ring (4) and the movable sleeve (6), the pins (10) being symmetrically disposed on the movable ring (4) and fixing the movable ring (4) to the movable sleeve (6).

7. The timing sprocket wheel as claimed in claim 1, wherein axially disposed sunken grooves (11) are circumferentially spaced on the right end face of the sprocket wheel body (1), through holes (12) are disposed on the bottoms of the sunken grooves (11), and the sprocket wheel body (1) is fixed through the through holes (12).