阅读说明：本技术 一种弹簧式无级变速器 (Spring type stepless speed changer ) 是由 赵良红 于 2020-08-18 设计创作，主要内容包括：一种弹簧式无级变速器,包括输入轴及其上的主动定盘,输出轴及其上的从动定盘,相对定盘移动的主动动盘和从动动盘,传动带设置在由定盘、动盘的端面形成的V形槽上,其特征在于：还包括保持架和调节螺母、膜片弹簧、导向杆,主动定盘、动盘以及从动定盘、动盘设置在保持架内框里,在主动动盘、从动动盘上通过推力轴承直接或间接地连接保持架,在保持架上设有螺纹孔,所述螺纹孔邻近主动动盘,所述螺纹孔内螺纹连接所述调节螺母,所述膜片弹簧设置在调节螺母与推力轴承之间。本发明可以采用较大的压紧力,可传递更大的扭矩,无需限制发动机扭矩输出,且变速响应快,可完全发挥汽车加速性能,省去了复杂的油压控制系统,降低了变速器的制造难度及成本,提高了汽车的燃油效率。(The utility model provides a spring buncher, includes input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, initiative driving disk and the driven driving disk that the relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include holder and adjusting nut, diaphragm spring, guide bar, initiative price fixing, driving disk and driven price fixing, driving disk setting are in the holder inside casing, directly or indirectly connect the holder through thrust bearing on initiative driving disk, driven driving disk, are equipped with the screw hole on the holder, the screw hole is close to initiative driving disk, screw hole internal thread connection adjusting nut, diaphragm spring sets up between adjusting nut and thrust bearing. The invention can adopt larger pressing force, can transmit larger torque, does not need to limit the torque output of an engine, has quick speed change response, can fully exert the acceleration performance of the automobile, saves a complex oil pressure control system, reduces the manufacturing difficulty and the cost of a speed changer, and improves the fuel efficiency of the automobile.)

1. The utility model provides a spring buncher, includes input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, initiative driving disk and the driven driving disk that the relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include holder and adjusting nut, diaphragm spring, guide bar, initiative price fixing, driving disk and driven price fixing, driving disk setting are in the holder inside casing, directly or indirectly connect the holder through thrust bearing on initiative driving disk, driven driving disk, are equipped with the screw hole on the holder, the screw hole is close to initiative driving disk, screw hole internal thread connection adjusting nut, diaphragm spring sets up between adjusting nut and thrust bearing.

2. The spring type continuously variable transmission according to claim 1, wherein: the retainer is connected with a speed change control rod, and the speed change control rod is driven by a speed change control mechanism to enable the retainer to move left and right along the guide rod.

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

4. The spring type continuously variable transmission according to claims 1 to 3, wherein: and a nut gear is processed on the adjusting nut and meshed with the tensioning driving gear, and the tensioning mechanism is connected with the tensioning driving gear and drives the tensioning driving gear to rotate.

5. The spring type continuously variable transmission according to claim 4, wherein: the holder is mounted on the guide bar and moves axially along the guide bar.

6. The spring type continuously variable transmission according to claim 4, wherein: the diaphragm spring comprises a round base part and a tooth-shaped film part located on the outer circle, the round base part is provided with a shaft hole, the round base part penetrates through the input shaft or the output shaft and abuts against the end face of the thrust bearing, and the free end of the tooth-shaped film part abuts against the end face of the adjusting nut.

Technical Field

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

Background

The stepless speed variator is a speed variator applied to automobile transmission system, and has the characteristics of simple structure, small volume, light weight, higher transmission efficiency and low manufacturing cost, and has wide application in automobiles.

The stepless speed changer utilizes the friction force between the V-shaped groove and the transmission belt to realize power transmission, and the currently applied stepless speed changer adopts a hydraulic mode to generate pressing force between the V-shaped groove and the transmission belt, and simultaneously changes the transmission ratio by adjusting hydraulic oil.

However, the conventional continuously variable transmission has the following disadvantages: (1) the V-shaped groove and the transmission belt are easy to slip, and the V-shaped groove and the transmission belt are easy to slip due to the fact that the requirement on oil pressure control accuracy of the continuously variable transmission is high, faults occur easily, pressing force is insufficient, and the V-shaped groove and the transmission belt slip, which is a common fault of the continuously variable transmission and is the most fatal problem. (2) The transmission torque is small and is limited by the maximum oil pressure of the continuously variable transmission system, and the transmission torque is generally small. (3) The speed change is delayed, because the oil pressure building time of the stepless speed changer is slow, the pressing force generated between the V-shaped groove and the transmission belt can not be increased in time, the torque output of an engine can be limited in the acceleration process of the automobile, the situation that the torque of the engine is accelerated too fast to avoid the slippage of the stepless speed changer is avoided, and as a result, the acceleration performance of the automobile is poor, the automobile is not suitable for violent driving, and the driving pleasure is insufficient. (4) The hydraulic control system is complex, difficult to manufacture and high in cost.

Disclosure of Invention

The invention provides a spring type stepless speed changer with a brand new structure, which utilizes the elastic force generated by elastic deformation of a diaphragm spring to provide pressing force between a V-shaped groove and a transmission belt of the stepless speed changer, utilizes a speed change control mechanism and a speed change control rod to realize change of transmission ratio, does not slip when transmitting power, has high reliability, large transmission torque and quick speed change response, is suitable for a large-torque engine, has a compact structure and overcomes the defects of the traditional stepless speed changer.

The technical scheme of the invention is as follows: the utility model provides a spring buncher, includes input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, initiative driving disk and the driven driving disk that the relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include holder and adjusting nut, diaphragm spring, guide bar, initiative price fixing, driving disk and driven price fixing, driving disk setting are in the holder inside casing, directly or indirectly connect the holder through thrust bearing on initiative driving disk, driven driving disk, are equipped with the screw hole on the holder, the screw hole is close to initiative driving disk, screw hole internal thread connection adjusting nut, diaphragm spring sets up between adjusting nut and thrust bearing.

The retainer is connected with a speed change control rod, and the speed change control rod is driven by a speed change control mechanism to enable the retainer to move left and right along the guide rod.

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

And a nut gear is processed on the adjusting nut and meshed with the tensioning driving gear, and the tensioning mechanism is connected with the tensioning driving gear and drives the tensioning driving gear to rotate.

The holder is mounted on the guide bar and moves axially along the guide bar.

The diaphragm spring comprises a round base part and a tooth-shaped film part located on the outer circle, the round base part is provided with a shaft hole, the round base part penetrates through the input shaft or the output shaft and abuts against the end face of the thrust bearing, and the free end of the tooth-shaped film part abuts against the end face of the adjusting nut.

Compared with the prior art, the invention has the following beneficial effects:

the spring type stepless speed changer utilizes the elastic force generated by elastic deformation of the diaphragm spring to provide pressing force between a V-shaped groove and a transmission belt of the stepless speed changer, utilizes the speed change control mechanism and the speed change control rod to realize the change of the transmission ratio, completely overcomes various defects of the traditional stepless speed changer adopting hydraulic control, and has the advantages of: (1) because the pressing force between the V-shaped groove and the transmission belt never disappears, the phenomenon of slipping between the V-shaped groove and the transmission belt cannot occur. (2) The transmission torque is large, and the pressing force between the V-shaped groove and the transmission belt is easy to increase, so that larger torque can be transmitted without limiting the torque output of an engine. (3) The speed change response is fast, a mechanism capable of changing speed fast is adopted, and meanwhile, the pressing force between the V-shaped groove and the transmission belt never disappears, so that the fast speed change can be realized, the acceleration performance of the automobile can be fully exerted, and the driving experience is extremely strong. (4) The hydraulic control system is not used, the manufacturing difficulty and cost of the transmission are reduced, and the fuel efficiency of the automobile is improved.

Drawings

Fig. 1 is a general structural diagram of an embodiment of a spring type continuously variable transmission according to the present invention.

FIG. 2 is a front end view of an input shaft of an embodiment of a spring-loaded continuously variable transmission of the present invention.

Fig. 3 is a development view (a-a partial cross section of fig. 2) of a spring type continuously variable transmission of the present invention.

Fig. 4 is a structural diagram of a spring type continuously variable transmission adjusting nut.

FIG. 5 is a diagram of a diaphragm spring of an embodiment of a spring-type continuously variable transmission according to the present invention.

FIG. 6 is a schematic diagram of the spring type stepless transmission according to the present invention, wherein the transmission ratio is changed from large to small.

FIG. 7 is a schematic diagram of the operation of pressing force adjustment of the spring type continuously variable transmission tensioning mechanism of the present invention.

Fig. 8 is a schematic diagram of a torque transmission structure of the spring type continuously variable transmission of the present invention.

Detailed Description

The invention provides pressing force between the V-shaped groove of the continuously variable transmission and the transmission belt by using elastic force generated by elastic deformation of the diaphragm spring. The axial movement of the retainer is controlled by the speed change control mechanism to realize the change of the transmission ratio of the speed changer.

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

a spring type continuously variable transmission comprises an input shaft 3, a guide rod 11, a retainer 1, a diaphragm spring 20, a driving moving disc 2, a driving fixed disc 12, a driven moving disc 15, a driven fixed disc 10, a transmission belt 8, a tensioning mechanism 6, a tensioning driving gear 4, an adjusting nut 5, a speed change control mechanism 13, a speed change control rod 14, an output shaft 9 and the like, and is shown in figures 1, 2 and 3.

The driving fixed disc 12 is fixed on the input shaft 3, the driving movable disc 2 is installed on the input shaft 3 through a spline and can move axially, and a driving V-shaped groove is formed between the driving fixed disc 12 and the driving movable disc 2 after the driving fixed disc and the driving movable disc are assembled.

Driven fixed disk 10 is fixed on output shaft 9, and driven movable disk 15 passes through the spline and installs on output shaft 9, but axial displacement, forms driven V-arrangement groove between the good back of driven fixed disk 10 and driven movable disk 15.

The driving belt 8 is installed between the driving V-shaped groove and the driven V-shaped groove.

Four opposite corners of the retainer 1 are mounted on four guide rods 11 and can move along the guide rods 11 in the axial direction, the guide rods 11 are parallel to the input shaft 3 and the output shaft 9, and the retainer 1 is contacted with the driven disc 15 through a thrust bearing 16 on one side close to the output shaft 9.

The adjusting nut 5 is provided with a nut gear 25 and a thread 26, as shown in fig. 4. The nut gear 25 meshes with the tensioning pinion 4, and the thread 26 turns into the threaded hole of the cage 1, as shown in fig. 3. The outer circumferential side of the diaphragm spring 20 is in contact with the adjusting nut 5, and the other side is in contact with the driving disk 12 via the thrust bearing 7. Fig. 5 is a schematic diagram of the diaphragm spring structure.

The tensioning mechanism 6 is connected with the tensioning driving gear 4 and drives the tensioning driving gear 4 and the adjusting nut 5 to rotate, so that the adjusting nut 5 can be controlled to be screwed in or out from the threaded hole of the retainer 1.

One end of the shift control lever 14 is mounted on the cage 1. The shift control mechanism 13 is matched with the shift control lever 14, and the shift control mechanism 13 can drive the shift control lever 14 and the retainer 1 to move left and right to change the transmission ratio of the continuously variable transmission, as shown in fig. 6, the transmission ratio is changed from large to small.

In order to make the transmission arrangement flexible, the positions of the input shaft 3 and the output shaft 9 may be interchanged.

Analyzing the working process:

1. power transmission process

A spring-type stepless speed variator features that a diaphragm spring is used to provide the pressing force between V-shaped slot and drive belt. The outer circular end of the diaphragm spring is warped when the diaphragm spring is in a free state, and gradually becomes straight when the outer circular end of the diaphragm spring is pressed, as shown in fig. 7.

Before power transmission is realized, the tensioning mechanism 6 drives the tensioning driving gear 4 to rotate to drive the nut gear 25 on the adjusting nut 5, so that the adjusting nut 5 rotates to penetrate into the threaded hole of the retainer 1 inwards, the diaphragm spring 20 is pushed to generate elastic deformation, the driving movable disk 2 is extruded, the V-shaped grooves and the transmission belt 8 generate pressing force respectively, and when the input shaft 3 rotates, power is transmitted to the output shaft 9 by using the friction force between the V-shaped grooves and the transmission belt 8, so that the power transmission is realized.

Transmission ratio variation

As shown in fig. 3, when the shift control lever 14 is at the leftmost position and the cage 1 is at the leftmost position under the control of the shift control mechanism 13, the distance between the driving movable plate 2 and the driving fixed plate 12 is the largest, and the driving belt 8 is closest to the center of the driving V-shaped groove, i.e., the driving rotation radius is the smallest; the distance between the driven movable disc 16 and the driven fixed disc 10 is the smallest, and the transmission belt 8 is the farthest from the driven V-shaped groove center, namely the driven rotating radius is the largest, so that the transmission ratio is the largest at the moment.

As shown in fig. 6, when the transmission ratio is to be decreased, the speed change control mechanism 13 drives the speed change control rod 14 to move rightwards, so as to drive the retainer 1 and the driving disk 2 to move rightwards, and the extrusion transmission belt 8 moves towards the outer circle of the driving V-shaped groove, so that the driving rotation radius is increased; the driven movable disc 15 also moves rightwards under the pressing action of the transmission belt 8, the transmission belt 8 moves towards the center of the driven V-shaped groove, the driven rotating radius is reduced, and the transmission ratio is reduced from large to small.

When the shift control lever 14 is moved leftward under the control of the shift control mechanism 13, the gear ratio is changed from small to large.

Pressing force adjustment between the groove and the belt

The tensioning mechanism 6 controls the adjusting nut 5 to be screwed in or out of the threaded hole of the retainer 1, and the deformation of the diaphragm spring 20 is adjusted to adjust the pressing force of the V-shaped groove and the transmission belt, so that the transmission torque is adjusted.

As shown in fig. 8, when the tensioning mechanism 6 controls the adjusting nut 5 to be screwed out of the threaded hole of the holder 1, the elastic deformation of the diaphragm spring 20 is reduced, the pressing force between the V-shaped groove and the transmission belt is reduced, and the transmission torque is reduced.

When the transmission torque is to be increased, the tensioning mechanism 6 controls the adjusting nut 5 to be screwed in from the threaded hole of the retainer 1, the elastic deformation of the diaphragm spring 20 is increased, the pressing force between the V-shaped groove and the transmission belt is also increased, and the transmission torque is increased.

In order to make the transmission arrangement flexible, the positions of the input shaft 3 and the output shaft 9 may be interchanged.

The spring type stepless speed changer utilizes the elastic force generated by elastic deformation of the diaphragm spring to provide pressing force between the V-shaped groove of the stepless speed changer and the transmission belt, utilizes the speed change control mechanism and the speed change control rod to realize the change of the transmission ratio, completely overcomes various defects of the traditional stepless speed changer adopting hydraulic control, and has the advantages that the pressing force between the V-shaped groove and the transmission belt is more reliable, so the V-shaped groove and the transmission belt cannot slide, simultaneously can adopt larger pressing force, can transmit larger torque, does not need to limit the torque output of an engine, has fast speed change response, can completely exert the acceleration performance of an automobile, saves a complex oil pressure control system, reduces the manufacturing difficulty and the cost of the speed changer, and improves the fuel efficiency of the automobile.

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.