阅读说明：本技术 一种钢带式无级变速器 (Steel belt type stepless speed changer ) 是由 赵良红 于 2020-08-18 设计创作，主要内容包括：一种钢带式无级变速器,其特征在于：包括主动传动部分和从动传动部分,两传动部分分别包括输入/输出轴、动盘、定盘、传动片及控制装置,动盘和定盘的工作面上设置若干径向槽,所述传动片两端设置与所述径向槽相适配的滑块,所述传动片将动盘、定盘滑动连接,所述传动片的主体上设置一个或以上的钢带槽,传动钢带设置在主动传动片和从动传动片的钢带槽上,控制装置用于分别控制主动传动部分和从动传动部分的动盘相对定盘轴向移动、并使传动钢带保持张紧。本发明可以实现传动比的连续变化,实现了无极变速器传递动力时不会打滑,可靠性高,传动比变化范围大,变速器零件数量少,结构紧凑,变速器的轴向尺寸小,可采用单向动力传递模式或双向动力传递模式,适用于各类设备变速的要求,特别是汽车变速器。(A steel belt type continuously variable transmission is characterized in that: including initiative transmission part and driven transmission part, two transmission parts are including input/output shaft, driving disk, price fixing, driving plate and controlling means respectively, set up a plurality of radial grooves on the working face of driving disk and price fixing, the driving plate both ends set up with the slider of radial groove looks adaptation, driving plate, price fixing sliding connection are with driving disk to the driving plate, the steel band groove that sets up one or more in the main part of driving plate, the setting of transmission steel band is on the steel band groove of initiative driving plate and driven transmission plate, and controlling means is used for controlling the relative price fixing axial displacement of driving disk of initiative transmission part and driven transmission part respectively, and makes the transmission steel band keep the tensioning. The invention can realize the continuous change of the transmission ratio, realizes no slipping when the continuously variable transmission transmits power, has high reliability, large change range of the transmission ratio, small number of transmission parts, compact structure and small axial size of the transmission, can adopt a unidirectional power transmission mode or a bidirectional power transmission mode, and is suitable for the requirements of various equipment on speed change, in particular to an automobile transmission.)

1. A steel belt type continuously variable transmission is characterized in that: including initiative transmission part and driven transmission part, two transmission parts are including input/output shaft, driving disk, price fixing, driving plate and controlling means respectively, set up a plurality of radial grooves on the working face of driving disk and price fixing, the driving plate both ends set up with the slider of radial groove looks adaptation, driving plate, price fixing sliding connection are with driving disk to the driving plate, the steel band groove that sets up one or more in the main part of driving plate, the setting of transmission steel band is on the steel band groove of initiative driving plate and driven transmission plate, and controlling means is used for controlling the relative price fixing axial displacement of driving disk of initiative transmission part and driven transmission part respectively, and makes the transmission steel band keep the tensioning.

2. The steel belt type continuously variable transmission according to claim 1, wherein: the radial grooves on the movable disc and the fixed disc comprise positioning grooves and sliding grooves which are communicated, the sliding blocks at two ends of the transmission piece comprise positioning blocks and sliding blocks, the positioning blocks move in the positioning grooves, and the sliding blocks move in the sliding grooves.

3. The steel belt type continuously variable transmission according to claim 2, wherein: the driving movable disc is installed on the input shaft through a sliding spline, and the driven movable disc is installed on the output shaft through a sliding spline.

4. The steel belt type continuously variable transmission according to claims 1 to 3, wherein: the side surface of the transmission steel belt and the side wall of the steel belt groove are inclined planes, and the inclination angles of the two inclined planes are both.

5. The steel belt type continuously variable transmission according to claim 4, wherein: the working surfaces of the movable disc and the fixed disc of the driven transmission part and the driving transmission part are inclined at an angle beta, and beta is larger than beta.

6. The steel belt type continuously variable transmission according to claim 5, wherein: the transmission steel belt is formed by superposing a plurality of steel belts, and the side surface of the transmission steel belt is in contact with the inclined surface of the steel belt groove.

Technical Field

The invention relates to the technical field of transmissions, in particular to a steel belt type continuously variable transmission.

Background

The continuously variable transmission is a speed change device applied to an automobile transmission system, and the performance of the speed change device directly influences the overall performance of an automobile.

At present, the automobile continuously variable transmission utilizes the friction force between a driving sheet and a V-shaped disc to transmit power, and has the defects that: the friction force between the transmission piece and the V-shaped disc is small, so that the transmission piece is easy to slip, the reliability is low, and the service life of the transmission piece is influenced; the transmission torque is small, and the engine is generally only suitable for engines with small torque. The steel belt type stepless speed changer utilizes the friction force between the transmission sheet and the transmission steel belt to transmit power, and can obtain larger friction force between the transmission sheet and the transmission steel belt, so the steel belt type stepless speed changer is not easy to slip, has high reliability and large transmission torque, and is suitable for large-torque engines.

Disclosure of Invention

The invention aims to solve the technical problem of providing a steel belt type stepless speed changer with a brand new structure, which is not easy to slip when transmitting power, has high reliability and large transmission torque, is suitable for a large-torque engine, has a compact structure, overcomes the defects of the existing stepless speed changer, and can be used on vehicles such as fuel automobiles, hybrid automobiles, pure electric automobiles and the like and other speed change mechanisms.

The technical scheme of the invention is as follows: a steel belt type continuously variable transmission is characterized in that: including initiative transmission part and driven transmission part, two transmission parts are including input/output shaft, driving disk, price fixing, driving plate and controlling means respectively, set up a plurality of radial grooves on the working face of driving disk and price fixing, the driving plate both ends set up with the slider of radial groove looks adaptation, driving plate, price fixing sliding connection are with driving disk to the driving plate, the steel band groove that sets up one or more in the main part of driving plate, the setting of transmission steel band is on the steel band groove of initiative driving plate and driven transmission plate, and controlling means is used for controlling the relative price fixing axial displacement of driving disk of initiative transmission part and driven transmission part respectively, and makes the transmission steel band keep the tensioning.

The radial grooves on the movable disc and the fixed disc comprise positioning grooves and sliding grooves which are communicated, the sliding blocks at two ends of the transmission piece comprise positioning blocks and sliding blocks, the positioning blocks move in the positioning grooves, and the sliding blocks move in the sliding grooves.

The driving movable disc is installed on the input shaft through a sliding spline, and the driven movable disc is installed on the output shaft through a sliding spline.

The side surface of the transmission steel belt and the side wall of the steel belt groove are inclined planes, and the inclination angles of the two inclined planes are both.

The working surfaces of the movable disc and the fixed disc of the driven transmission part and the driving transmission part are inclined at an angle beta, and beta is larger than beta.

The transmission steel belt is formed by superposing a plurality of steel belts, and the side surface of the transmission steel belt is in contact with the inclined surface of the steel belt groove.

Compared with the prior art, the invention has the following advantages: the steel belt type stepless speed changer is characterized in that the positions of driving pieces arranged on a driving transmission part and a driven transmission part are continuously changed, so that the effective transmission radiuses of the driving part and the driven part are continuously changed, and stepless speed change is realized. The inclined angle of the side surface of the transmission steel belt and the inclined plane of the steel belt groove is smaller than the inclined angles of the working surfaces of the movable disc and the fixed disc of the driven transmission part and the driving transmission part, and the pressure between the transmission sheet and the transmission steel belt is larger, so that larger friction force can be obtained between the transmission sheet and the transmission steel belt, and the steel belt type continuously variable transmission is not easy to slip, high in reliability, large in transmission torque and suitable for a large-torque engine.

Drawings

Fig. 1(a) is a schematic view of the general structure of an embodiment of a steel belt type continuously variable transmission according to the present invention.

FIG. 1(b) is a sectional view taken along line A-A of FIG. 1.

Fig. 2(a) is a structural view of the driving transmission part of the steel belt type continuously variable transmission of the present invention.

Fig. 2(b) is a partially enlarged view of the active transmission portion of the steel belt type continuously variable transmission of the present invention.

Fig. 3(a) is a structural view of a drive plate of the steel belt type continuously variable transmission of the present invention.

Fig. 3(b) is a plan view of fig. 3 (a).

FIG. 4(a) is a schematic view showing the installation relationship of the driving movable plate, the driving fixed plate, the driving plate and the driving steel belt of the steel belt type continuously variable transmission according to the present invention.

FIG. 4(B) is a sectional view taken along line B-B of FIG. 4 (a).

FIG. 4(c) is a partial enlarged view of the installation relationship of the driving movable disk, the driving fixed disk, the driving plate and the driving steel belt of the steel belt type continuously variable transmission according to the present invention.

FIG. 5 is a diagram showing the relationship between the inclination angle of the belt groove of the driving plate and the inclination angle of the driving plate of the steel belt type continuously variable transmission according to the present invention.

Fig. 6(a) is a first force analysis diagram of the steel belt type continuously variable transmission according to the present invention.

Fig. 6(b) is a stress analysis diagram of the steel belt type continuously variable transmission according to the present invention.

Fig. 7 is a schematic diagram of the change of the transmission ratio of the steel belt type continuously variable transmission of the present invention.

FIG. 8(a) is a structural change diagram of a belt type continuously variable transmission of the present invention.

FIG. 8(b) is a variation diagram of the steel belt type continuously variable transmission of the present invention.

Detailed Description

The invention mainly utilizes the distance change between the transmission sheets arranged on the movable disc and the fixed disc and the center of the transmission shaft, thereby changing the size of the transmission ratio.

The technical scheme of the invention is further explained by combining the accompanying drawings 1-8 of the specification and specific embodiments:

the multi-group steel belt commercial stepless speed changer mainly comprises a driving transmission part 100, a driven transmission part 200 and a transmission steel belt 5, as shown in figures 1(a) and (b).

The driving transmission part 100 and the driven transmission part 200 have the same composition. The driving transmission part 100 consists of an input shaft 3, a driving movable disc 1, a driving fixed disc 8, a transmission sheet 2 and a driving control device 4; the driven transmission part 200 is composed of an output shaft 6, a driven movable disk 9, a driven fixed disk 7, a transmission piece 2 and a driven control device 10.

The driven transmission part 200 and the driving transmission part 100 have the same component composition and installation position relationship. The driving transmission part 100 and the driven transmission part 200 are oppositely and correspondingly arranged, namely the driving control device 4, the driving movable disc 1 and the driven fixed disc 7 correspond, and the driving fixed disc 8 corresponds to the driven movable disc 9 and the driven control device 10.

Since the driven transmission part 200 has the same component as the driving transmission part 100, the driving transmission part 100 is taken as an example to illustrate the installation relationship.

The active driving plate 1, the active fixed plate 8 and the active control device 4 of the active transmission part 100 are mounted on the input shaft 3, as shown in fig. 2 (a). Wherein initiative fixed disk 8 fixed mounting is on input shaft 3, and initiative driving disk 1 passes through sliding spline 31 to be installed on input shaft 3, and initiative controlling means 4 is in initiative driving disk 1 one side, and the axial displacement is to control initiative driving disk 1 along input shaft 3.

A plurality of positioning grooves 81 and sliding grooves 82 with the same number are radially processed on the driving movable disk 1 and the driving fixed disk 8, and the positioning grooves 81 are communicated with the sliding grooves 82, as shown in fig. 2 (b). The corresponding side of the driving movable disc 1 and the driving fixed disc 8 is an inclined working surface 83. The positioning groove 81, the sliding groove 82 and the working surface 83 are inclined at the same angle. After the installation, the positioning grooves 81 and the sliding grooves 82 of the driving movable disc 1 and the driving fixed disc 8 are opposite.

The structure of the transmission strap 2 is as shown in fig. 3(a) and (b), and a positioning block 21, a sliding block 23, a pressure surface 22 and a steel belt groove 24 are processed on the transmission strap 2.

Both ends of the transmission piece 2 are mounted in the positioning grooves 81 through the positioning blocks 21, the sliding block 23 is located in the sliding groove 82, and the pressure surface 22 is in contact with the working surface 83, as shown in fig. 4(a), 4(b), and 4 (c). The number of the transmission plates 2 is consistent with the number of the sliding grooves 82 of the driving rotor plate 1.

The driving steel belts 5 are arranged in the steel belt grooves 24 of the driving strips 2 on the driven transmission part 200 and the driving transmission part 100, the number of the driving steel belts 5 is consistent with that of the steel belt grooves 24 of the driving strips 2, each driving steel belt 5 is formed by overlapping a plurality of steel belts, the sections of the driving steel belts 5 are consistent with that of the steel belt grooves 24 and are trapezoidal, and as shown in fig. 5, the side surfaces 51 of the driving steel belts 5 are in contact with the inclined surfaces 28 of the steel belt grooves 24.

In order to obtain a relatively large pressure between the side surface 51 of the driving steel strip 5 and the inclined surface 28 of the steel strip groove 24 on the driving strap 2, the inclination angle between the side surface 51 of the driving steel strip 5 and the inclined surface 28 of the steel strip groove 24 is smaller than the inclination angle β between the driven transmission part 200 and the working surface 83 of the movable and fixed disks of the driving transmission part 100, as shown in fig. 5.

Analyzing the working process:

1. power transmission process

As shown in fig. 6(a) and (b), under the action of the control device 4, the driving disc 1 and the driving disc 8 generate the pushing forces F1 and F2 with equal magnitude and opposite directions, so that the pressing surfaces 22 on both sides of the driving disc 2 are subjected to the pressing forces F3 and F4 of the working surfaces 83 of the driving disc 1 and the driving disc 8, so that the driving disc 2 tends to move out of the axis of the input shaft 3, and similarly, the driving disc 2 of the driven transmission part 200 also tends to move out of the axis of the output shaft 6, so that the transmission steel belt 5 is tensioned, and the transmission steel belt 5 generates the pulling forces F6 and F7. Under the action of the tension of the transmission steel belt 5, the side surface 51 of the transmission steel belt 5 and the inclined surface 28 of the steel belt groove 24 have pressure N1 and N2, and due to the existence of the pressure, when the input shaft 3 rotates, friction force f is generated between the transmission steel belt 5 and the transmission piece 2, and the power is transmitted to the output shaft 6 by the friction force.

Because the driving steel belt 5 is respectively contacted with the driving transmission parts 100 and the driven transmission parts 200 and the upper transmission sheets 2 and has friction force, the stress of the single transmission sheet 2 is relatively small, and the deformation of the transmission sheet 2 is reduced.

2. Transmission ratio variation

As shown in fig. 1(a), (b), when the driving stationary plate 8 is farthest from the driving movable plate 1 of the driving transmission part 100, the transmission plate on the driving transmission part 100 is closest to the input shaft 3, and the effective transmission radius is smallest; when the driving fixed disc 9 of the driven transmission part 200 is closest to the driven fixed disc 7, the transmission sheet on the driven transmission part 200 is farthest from the output shaft 6, the effective transmission radius is the largest, and the transmission ratio is the largest at the moment.

As shown in fig. 7, when the control device 4 of the active transmission part 100 pushes the active fixed disk 1 and the active fixed disk 8 to approach each other, the transmission plate on the active transmission part 100 will be far away from the axis of the input shaft 3, and the effective transmission radius will increase; meanwhile, the distance between the driving movable disc 9 and the driven fixed disc 7 of the driven transmission part 200 is increased, the transmission piece on the driven transmission part 200 is close to the output shaft 6, the effective transmission radius is reduced, and the transmission ratio is reduced.

The number of the positioning slots 81 and the sliding slots 82 on the driving transmission part 100 and the driven transmission part 200 can be increased or decreased according to the actual design requirement.

The number of the steel belt grooves 24 on the transmission strap 2 and the number of the steel belt pieces of the transmission steel belt 5 can also be increased or decreased according to actual design requirements, for example, 6 steel belt grooves 24 are shown in fig. 8(a) and 8(b), and the number of the steel belt pieces of the transmission steel belt 5 in fig. 8(b) is 6.

The embodiments described above are merely exemplary embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the claims. The technical scheme of the invention is partially changed without creative labor, or equivalent replacement of partial technical characteristics of the technical scheme of the invention belongs to the protection scope of the invention.