Transmission device capable of adjusting transmission ratio according to rotating speed

Abstract

The transmission device capable of adjusting the transmission ratio according to the rotating speed comprises a driving wheel set and a driven wheel set, the driving wheel set comprises a driving shaft, a fixed belt disc arranged at one end of the driving shaft and a movable belt disc arranged at the other end of the driving shaft, the driving shaft is connected with a power output end, and the fixed belt disc and the movable belt disc form a driving wheel. A hinge mechanism is arranged on the right side of the movable belt disc, the hinge mechanism receives power through the driving shaft and drives the movable belt disc to reciprocate through centrifugal force, the driven wheel set comprises a driven shaft and a driven wheel, and the driven wheel is connected with the driving wheel through a transmission belt. According to the utility model, the distance between the belt pulleys can be adjusted by sensing the rotating speed of the driving shaft through the hinge mechanism, so that the CVT function is realized; through the movement of the hinge and the lever, the acting force is changed at different positions and different angles, the effect of optimizing the working curve of the pressing force is achieved, meanwhile, the safety of a traditional CVT can be greatly improved, and a throwing block of the CVT is effectively prevented from flying out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of variable speed device with transmission, more particularly to a kind of variable speed device that can adjust transmission ratio according to rotational speed. BACKGROUND

[0002] The belt is an important component for transmitting the power of the engine, so that the power generated by the engine can be applied. Mainly, the belt is sleeved on an auxiliary device to transmit force. However, the traditional one uses a centrifugal bead structure, and the size of the force is constant during transmission. Moreover, it can only transmit power and cannot achieve other functions. Therefore, there are many shortcomings in practical application. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the defects of prior art, and provides a kind of variable speed device that can adjust transmission ratio according to rotational speed. The utility model can adjust the skin spacing by feeling the speed of the driving shaft, so as to realize the CVT function. Through the hinge and lever, the force changes at different positions and angles, and the force amplification is realized. At the same time, changing the weight of the hinge can change the speed curve.

[0004] The utility model aims at overcoming the defects of prior art, and provides a kind of variable speed device that can adjust transmission ratio according to rotational speed. The utility model can adjust the skin spacing by feeling the speed of the driving shaft, so as to realize the CVT function. Through the hinge and lever, the force changes at different positions and angles, and the force amplification is realized. At the same time, changing the weight of the hinge can change the speed curve.

[0005] In one preferred embodiment, the hinge mechanism includes a hinge fixed support, a first hinge arm and a second hinge arm. The hinge fixed support is fixed on the driving shaft and located on the right side of the movable belt disc. One end of the first hinge arm is hinged to the end of the hinge fixed support through a first hinge shaft. One end of the second hinge arm is hinged to the other end of the first hinge arm through a second hinge shaft. The other end of the second hinge arm is hinged to the end of the movable belt disc through a third hinge shaft.

[0006] In one preferred embodiment, the hinge mechanism includes a hinge fixed support, a first hinge arm and a second hinge arm. The hinge fixed support is fixed on the driving shaft and located on the right side of the movable belt disc. One end of the first hinge arm is hinged to the end of the hinge fixed support through a first hinge shaft. One end of the second hinge arm is hinged to the other end of the first hinge arm through a second hinge shaft. The other end of the second hinge arm is hinged to the end of the movable belt disc through a third hinge shaft.

[0007] In one preferred embodiment, the maximum distance between the fixed pulley and the movable pulley in the low speed state is less than the width of the belt.

[0008] In one preferred embodiment, the movable pulley is provided with a groove near one end of the hinge fixing support, and the groove is used for embedding the hinge fixing support when the movable pulley moves to the rightmost end.

[0009] In one preferred embodiment, the included angle is 26°, and the included angle is symmetrical about the opposite vertical surface.

[0010] The beneficial effects of the present application are as follows: the present application can change the working radius of the belt by adjusting the width of the pulley through the change of the rotation speed of the driving wheel and the driving shaft, thereby realizing the CVT function; through the change of the hinge mechanism and the lever mechanism, the different widths between the fixed pulley and the movable pulley are changed, the working radius of the belt is changed accordingly, and the proportional change function of the working radius of the transmission belt of the driving wheel and the driven wheel is realized, and the change function of the transmission ratio of the driving wheel and the driven wheel is also realized, and the safety of the traditional CVT is greatly improved, and the flying out of the CVT block is effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0012] Fig. 1 It is a structural schematic diagram of the present application;

[0013] Fig. 2 It is a structural schematic diagram of the driving wheel set of the present application;

[0014] Fig. 3 It is a structural change schematic diagram of the driving wheel set when working;

[0015] In the figure, 1 is a driving shaft, 2 is a fixed pulley, 3 is a movable pulley, 31 is a groove, 4 is a hinge mechanism, 41 is a hinge fixing support, 42 is a first hinge arm, 43 is a second hinge arm, 44 is a first hinge shaft, 45 is a second hinge shaft, 46 is a third hinge shaft, 5 is a driven wheel set, 51 is a driven shaft, 52 is a driven wheel, and 6 is a transmission belt. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0018] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] The terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0021] The terms "parallel", "vertical" and the like do not mean that the components must be absolutely parallel or vertical, but can be slightly inclined. For example, "parallel" only means that its direction is relatively more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly inclined.

[0022] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal, vertical or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In addition, the terms "substantially", "approximately", and the like are intended to convey that the associated content is not required to be exact, but can have some variability. For example, "substantially equal" does not mean exactly equal, as exact equality is difficult to achieve in actual production and operation processes, and generally there is some deviation. Therefore, in addition to exact equality, "substantially equal" also includes the above-mentioned case of having some deviation. By way of example, in other cases, unless otherwise specified and limited, the terms "substantially", "approximately", and the like have similar meanings as described above.

[0024] In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "set", "install", "connect", and "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] Referring to Figs. 1-3 The utility model provides a kind of technical scheme: a transmission device capable of adjusting transmission ratio according to rotating speed, including driving wheel group and driven wheel group 5, the driving wheel group includes driving shaft 1, fixed belt disc 2 being arranged at the one end of the driving shaft 1, mobile belt disc 3 being arranged at the other end of driving shaft 1, the end of the driving shaft 1 where the fixed belt disc 2 is connected with power output end, the fixed belt disc 2 and mobile belt disc 3 constitute driving wheel, the mobile belt disc 3 can reciprocate transversely on driving shaft 1, mobile belt disc 3 right side is equipped with the hinge mechanism 4 for driving mobile belt disc 3 to and fro movement, so hinge mechanism 4 drives mobile belt disc 3 reciprocating movement using centrifugal force received from the output end of driving shaft 1 under different rotating speed, there is included angle between the opposite surface of fixed belt disc 2 and mobile belt disc 3, the included angle is 20 ° ~ 30 °, driven wheel group 5 includes driven shaft 51 and driven wheel 52, and the driven wheel 52 is connected between driving wheel by transmission belt.The utility model can change the working radius of belt by adjusting the width of belt disc through the change of driving wheel and driving shaft 1 rotating speed by hinge mechanism 4, so as to realize CVT function;Through the change of hinge mechanism 4 and lever mechanism, the different width between fixed belt disc 2 and mobile belt disc 3 is changed, so that the working radius of transmission belt 6 is changed, and the proportional change function of the working radius of transmission belt 6 of driving wheel and driven wheel 52 is realized, while the transmission ratio change function of driving wheel and driven wheel 52 is realized, and the safety of traditional CVT can be greatly improved, and the flying out of CVT block is effectively prevented.

[0026] Preferably, the hinge mechanism 4 is provided with three. Setting three can balance the force, ensure that the moving belt disc 3 can be uniformly stressed when re-driving, reduce the friction between the moving belt disc 3 and the driving shaft 1, and also avoid the phenomenon of moving jam.

[0027] Preferably, the hinge mechanism 4 includes a hinge fixed support 41, a first hinge arm 42 and a second hinge arm 43, the hinge fixed support 41 is fixed on the driving shaft 1 and located at the right side of the moving belt disc 3, one end of the first hinge arm 42 is hinged with the end of the hinge fixed support 41 through a first hinge shaft 44, one end of the second hinge arm 43 is hinged with the other end of the first hinge arm 42 through a second hinge shaft 45, and the other end of the second hinge arm 43 is hinged with the end of the moving belt disc 3 through a third hinge shaft 46.

[0028] Preferably, the maximum distance between the fixed belt disc 2 and the moving belt disc 3 in the low speed state is less than the width of the belt. The direct contact between the belt and the driving shaft 1 can be avoided, so that the adjustment does not appear to be empty, and the distance between the belt and the driving shaft 1 can be adjusted during the movement of the moving belt disc 3, so that the CVT function is realized.

[0029] Preferably, the moving belt disc 3 is provided with a groove 31 near one end of the hinge fixed support 41, and the groove 31 is used for embedding the hinge fixed support 41 when the moving belt disc 3 moves to the rightmost end. The interference between the hinge fixed support 41 and the moving belt disc 3 can be avoided when the moving belt disc 3 moves to the rightmost end, and the moving distance can be expanded, so that the length of the driving shaft 1 is reduced, the shaking amplitude is reduced or avoided during high speed rotation, and the service life of the driving shaft 1 is improved.

[0030] Preferably, the included angle is 26°, and the included angle is symmetrical about the opposite vertical surface.

[0031] Preferably, as the speed increases, the moving belt disc approaches the fixed belt disc under the action of centrifugal force, and the working radius of the belt becomes larger under the extrusion of the belt disc, and the driven disc radius becomes smaller, so that the transmission ratio is changed.

[0032] The above only describes the preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by the above teachings or related technologies or knowledge. Any modification and change made by the person skilled in the art without departing from the technical and scope of the present application shall be within the protection scope of the claims attached to the present application.

Claims

1. A transmission device capable of adjusting a gear ratio in accordance with a rotational speed, characterized by: The application relates to a transmission device, which comprises a driving wheel set and a driven wheel set, the driving wheel set comprises a driving shaft, a fixed belt disc arranged at one end of the driving shaft and a movable belt disc arranged at the other end of the driving shaft, the end of the driving shaft, where the fixed belt disc is arranged, is connected with a power output end, the fixed belt disc and the movable belt disc form a driving wheel, the movable belt disc can reciprocate transversely on the driving shaft, a hinge mechanism for driving the movable belt disc to reciprocate is arranged at the right side of the movable belt disc, so that the hinge mechanism drives the movable belt disc to reciprocate by centrifugal force generated under different rotating speeds of the output end received by the driving shaft, an included angle exists between the opposite surfaces of the fixed belt disc and the movable belt disc, the included angle is 20-30 DEG, the driven wheel set comprises a driven shaft and a driven wheel, and the driven wheel is connected with the driving wheel through a transmission belt.

2. A transmission arrangement capable of adjusting the gear ratio in accordance with the rotational speed according to claim 1, characterized in that: The hinge mechanism is provided with three or more.

3. A transmission arrangement capable of adjusting the gear ratio in accordance with the rotational speed according to claim 2, characterized in that: The hinge mechanism comprises a hinge fixing support, a first hinge arm and a second hinge arm, the hinge fixing support is fixed on the driving shaft and located at the right side of the movable belt disc, one end of the first hinge arm is hingedly connected with the end of the hinge fixing support through a first hinge shaft, one end of the second hinge arm is hingedly connected with the other end of the first hinge arm through a second hinge shaft, and the other end of the second hinge arm is hingedly connected with the end of the movable belt disc through a third hinge shaft.

4. The transmission device capable of adjusting the gear ratio according to the rotational speed according to claim 1, characterized by: The maximum distance between the fixed belt disc and the movable belt disc under low rotating speed is smaller than the width of the belt.

5. A transmission arrangement capable of adjusting the gear ratio in accordance with the rotational speed according to claim 3, characterized in that: With the increase of rotating speed, the movable belt disc approaches the fixed belt disc under the action of centrifugal force of the hinge, the working radius of the belt is increased under the extrusion of the belt disc, the radius of the driven disc is decreased, and the transmission ratio is changed.

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