CN216009419U

CN216009419U - High-durability tensioning wheel for automobile

Info

Publication number: CN216009419U
Application number: CN202121389145.7U
Authority: CN
Inventors: 杨鹏宇; 杨玉荣
Original assignee: Zhejiang Ruideli Automobile Components Co ltd
Current assignee: Zhejiang Ruideli Automobile Components Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-03-11
Anticipated expiration: 2031-06-22

Abstract

The utility model relates to the technical field of accessory driving at the front end of an automobile engine, in particular to a high-durability automobile tension wheel. The method comprises the following steps: a main body, a belt pulley; the belt pulley is used for being jointed with the belt; the main body comprises a central shaft, a connecting plate, a needle bearing and a torsion spring; one end of the connecting plate is sleeved on the central shaft, and the other end of the connecting plate is connected with the belt pulley; the needle bearing is arranged between the central shaft and the connecting plate, and the needle bearing ring is wound around the central shaft; and the torsion spring is used for applying elasticity to the connecting plate so that the connecting plate can swing by taking the central shaft as an axis. In the prior art, the friction generated by the rotation of the tensioning wheel main body is sliding friction, and along with the increase of mileage, the friction is easily abraded and then the tensioning wheel is inclined. Compared with the prior art, the roller pin bearing is additionally arranged in the main body, so that the friction is converted into rolling friction by the rotation of the main body, and the service life of the tension wheel is prolonged.

Description

High-durability tensioning wheel for automobile

Technical Field

The utility model relates to the technical field of accessory driving at the front end of an automobile engine, in particular to a high-durability automobile tension wheel.

Background

Automobile engine usually adopts belt drive, receives the influence of belt self characteristic, and along with the increase of live time, the length of belt can increase gradually, and this has just led to being connected between belt and the engine and has slipped easily, influences the normal operating of car, and consequently the take-up pulley is essential in automobile engine system.

Chinese patent discloses an automatic take-up pulley [ application number: CN201220444243.0, CN202883908U ] comprises: the body, extension board, torsional spring, belt pulley, axle bolt, bearing, linking arm, rotation center pin are equipped with the erection pin on the body, set up the depressed groove along the circumferencial direction of erection pin on the body, have avoided the interference with round pin accuse hole when the assembly, have reduced because the parallelism error of the automatic take-up pulley that the assembly interference arouses and engine installation base face, improve the coplanarity of take-up pulley and train. Although the technical scheme of this patent provides an effectual take-up pulley structure, the friction between linking arm and the center pin is sliding friction when the linking arm is swinging, and along with the increase of mileage, this kind of friction leads to excessive wear easily, causes the slope of take-up pulley, influences automobile engine system's normal operating.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model provides a high-durability tension wheel for an automobile.

In order to solve the technical problems, the utility model provides the following technical scheme:

a high durability tension pulley for automobiles comprising: a main body, a belt pulley; the belt pulley is used for being jointed with the belt; the main body comprises a central shaft, a connecting plate, a needle bearing and a torsion spring; one end of the connecting plate is sleeved on the central shaft, and the other end of the connecting plate is connected with the belt pulley; the needle bearing is arranged between the central shaft and the connecting plate, and the needle bearing ring is wound around the central shaft; and the torsion spring is used for applying elasticity to the connecting plate so that the connecting plate can swing by taking the central shaft as an axis.

In actual use, the body is mounted on an automobile engine, and the pulley is attached to the belt. During the operation of the engine, the torsion spring continuously applies elasticity to the connecting plate, so that the belt pulley can maintain the state of being attached to the belt. Along with the increase of engine operating duration, the length of belt will increase gradually, receives the influence of torsional spring elasticity, and the connecting plate will use the center pin to swing as the axle, and then drives the belt pulley and uses the center pin to swing as the axle to maintain the state that belt pulley and belt laminated each other, from this, in order to realize the purpose of tensioning belt. In the process that the connecting plate swings by taking the central shaft as the shaft, under the influence of the needle bearing, the friction between the connecting plate and the central shaft is converted from sliding friction to rolling friction, so that the abrasion is reduced, the inclination of the tensioning wheel caused by excessive abrasion is avoided, and the service life of the tensioning wheel is prolonged.

Furthermore, the needle bearing is cylindrical, the needle bearing extends along the axis direction of the central shaft, and the inner wall of the needle bearing is attached to the central shaft.

Furthermore, sealing rings are arranged at two ends of the needle bearing.

Further, the main body also comprises a main body shell; a cavity for accommodating the central shaft, the needle roller bearing and the torsion spring is arranged in the main body shell; one end of the torsional spring is abutted to the main body shell, and the other end of the torsional spring is abutted to the connecting plate.

Furthermore, a damping device is also arranged in the main body shell; the damping device surrounds the periphery of the torsion spring and is attached to the torsion spring; when the external diameter of torsional spring increases, damping device can laminate mutually with the inner wall of main part shell.

Further, the damping device comprises a supporting sheet and a damping sheet; the support sheet is wound around the torsion spring, and the support sheet and the torsion spring are attached to each other and the damping sheet is wound around the support sheet; when the outer diameter of the torsion spring is increased, the support sheet pushes the damping sheet to enable the damping sheet to be attached to the inner wall of the main body shell.

Furthermore, the damping fin is made of plastics.

Further, the support sheet is arc-shaped; the damping fin is arc-shaped.

Compared with the prior art, the utility model has the following advantages:

utilize the effectual friction with between connecting plate and the center pin of bearing to change into from sliding friction to the running friction to the effectual wearing and tearing that have reduced between connecting plate and the center pin have avoided the take-up pulley slope because of excessive wearing and tearing cause, the effectual life who prolongs the take-up pulley.

Utilize the sealing washer that sets up at the bearing tip, can effectively avoid debris such as dust to get into in the gap between bearing and the center pin to effectual life who prolongs bearing, and then the further life who prolongs the take-up pulley.

Utilize damping device can effectively alleviate the swing range of connecting plate, can effectively prolong the life of take-up pulley on the one hand, on the other hand can make the engine operation more stable.

Drawings

FIG. 1: the overall structure diagram.

FIG. 2: explosion diagram.

FIG. 3: the action of the damping device is shown schematically.

In the figure: 1-main body, 11-central shaft, 12-connecting plate, 13-needle bearing, 131-sealing ring, 14-torsion spring, 16-main body shell, 17-damping device, 171-supporting plate, 172-damping plate and 2-belt pulley.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

A high durability tension pulley for automobiles comprising: a main body 1 and a belt pulley 2. The main body 1 comprises a central shaft 11, a connecting plate 12, a needle bearing 13, a torsion spring 14 and a main body shell 16. The needle roller bearing 13 itself is cylindrical, and the needle roller bearing 13 extends in the axial direction of the center shaft. The needle bearing 13 is provided with a through hole at the center, and the through hole penetrates from one end of the needle bearing 13 to the other end of the needle bearing 13. The central shaft 11 passes through one end of the connecting plate 12, and the needle roller bearing 13 is arranged between the central shaft 11 and the connecting plate 12, so that the outer wall of the needle roller bearing 13 is attached to the connecting plate 12, and the inner wall of the needle roller bearing 13 is attached to the central shaft 11, namely, the needle roller bearing 13 surrounds the central shaft 11. The other end of the connecting plate 12 is connected to the pulley 2. The main body housing 16 has a cavity for accommodating the center shaft 11, the needle roller bearing 13, and the torsion spring 14. Meanwhile, the main body shell 16 and the connecting plate 12 are both provided with a stop for abutting against the torsion spring 14. The stopper on the main body case 16 abuts against one end of the torsion spring 14, and the stopper on the connecting plate 12 abuts against the other end of the torsion spring 14. When the torsion spring 14 is twisted, the torsion spring can apply an elastic force to the connecting plate 12 through the stopper, so as to urge the connecting plate 12 to swing about the central axis 11, thereby driving the pulley 2 to swing about the central axis 11.

In actual use, the main body case 16 is fixedly attached to an automobile engine. The torsion spring 14 is twisted by swinging the connecting plate 12 so that the torsion spring 14 can accumulate a certain elastic force. The pulley 2 is attached to the belt. During the operation of the engine, the torsion spring 14 continuously applies elastic force to the connecting plate 12 and further to the belt pulley 2, so that the belt pulley 2 is fully attached to the belt. As the engine operating time increases, the belt deforms to some extent resulting in a longer overall belt length. At this time, the link plate 12 swings about the center axis 11 by the elastic force of the torsion spring 14, and the pulley 2 swings about the center axis 11, so that the belt 2 is maintained in a state of being attached to the belt, thereby tightening the belt. During the swinging of the connecting plate 12, the connecting plate 12 will drive the needle bearing 13 to rotate. Therefore, sliding friction between the connecting plate 12 and the central shaft 11 is changed into rolling friction by the needle bearing 13, so that the inclination of the tensioning wheel caused by excessive abrasion is effectively avoided, and the service life of the tensioning wheel is effectively prolonged.

Wherein, the two ends of the needle bearing 13 are further provided with a sealing ring 151, and foreign matters such as external dust can be effectively prevented from entering a gap between the needle bearing 13 and the central shaft 11 through the sealing ring 151, so that the service life of the needle bearing 13 is prolonged.

Wherein, a damping device 17 is also arranged in the main body shell 16. The damper device 17 includes a support plate 171 and a damper plate 172. The damper 172 is made of a plastic material. The support plate 171 and the damper plate 172 are arc-shaped. The support plate 171 surrounds the torsion spring 14, and the support plate 171 is attached to the torsion spring 14. The damper plate 172 surrounds the support plate 171.

During actual operation, when the automobile runs, the belt may push the belt pulley 2 to cause the belt pulley 2 to swing reversely, so as to cause the connecting plate 12 to swing reversely, thereby twisting the torsion spring 14, so that the elastic force accumulated on the torsion spring 14 is enhanced. At this time, the outer diameter of the torsion spring 14 is increased to cause the support plate 171 to deform, so that the opening of the support plate 171 becomes larger, and the damper plate 172 is also deformed under the support of the support plate 171, so that the opening of the damper plate 172 becomes larger, and the damper plate 172 comes into contact with the inner wall of the main body housing 16. At this time, a frictional force is generated between the damper 172 and the inner wall of the body housing 16 to reduce the swing amplitude of the link plate 12. On one hand, the rotation amplitude of the needle bearing 13 is reduced, so that the loss of the needle bearing 13 is reduced, the service life of the tension wheel is further prolonged, and on the other hand, the operation of the engine is more stable.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A high durable take-up pulley for automobile, characterized in that: the method comprises the following steps: a main body (1) and a belt pulley (2);

the belt pulley (2) is used for being attached to a belt;

the main body (1) comprises a central shaft (11), a connecting plate (12), a needle bearing (13) and a torsion spring (14);

one end of the connecting plate (12) is sleeved on the central shaft (11), and the other end of the connecting plate (12) is connected with the belt pulley (2);

the needle roller bearing (13) is arranged between the central shaft (11) and the connecting plate (12), and the needle roller bearing (13) surrounds the periphery of the central shaft (11);

the torsion spring (14) is used for applying elasticity to the connecting plate (12) so that the connecting plate (12) can swing by taking the central shaft (11) as an axis.

2. The high-durability tension pulley for automobiles according to claim 1, characterized in that: the needle roller bearing (13) is cylindrical, the needle roller bearing (13) extends along the axial lead direction of the central shaft (11), and the inner wall of the needle roller bearing (13) is attached to the central shaft (11).

3. The high-durability tension pulley for automobiles according to claim 1, characterized in that: and sealing rings (131) are further arranged at two ends of the needle bearing (13).

4. The high-durability tension pulley for automobiles according to claim 1, characterized in that: the body (1) further comprises a body housing (16);

a cavity for accommodating the central shaft (11), the needle roller bearing (13) and the torsion spring (14) is arranged in the main body shell (16);

one end of the torsion spring (14) is abutted to the main body shell (16), and the other end of the torsion spring (14) is abutted to the connecting plate (12).

5. The high-durability tension pulley for automobiles according to claim 4, characterized in that: a damping device (17) is also arranged in the main body shell (16);

the damping device (17) surrounds the torsion spring (14), and the damping device (17) is attached to the torsion spring (14);

when the outer diameter of the torsion spring (14) is increased, the damping device (17) can be attached to the inner wall of the main body housing (16).

6. The high durability tension pulley for automobile according to claim 5, wherein: the damping device (17) comprises a supporting sheet (171) and a damping sheet (172);

the support sheet (171) surrounds the periphery of the torsion spring (14), and the support sheet (171) is attached to the torsion spring (14)

The damping sheet (172) surrounds the supporting sheet (171);

when the outer diameter of the torsion spring (14) is increased, the support plate (171) pushes the damping piece (172) to enable the damping piece (172) to be attached to the inner wall of the main body shell (16).

7. The high durability tension pulley for automobile according to claim 6, wherein: the damping fin (172) is made of plastic.

8. The high durability tension pulley for automobile according to claim 6, wherein: the support sheet (171) is arc-shaped;

the damping fin (172) is arc-shaped.