Rubber arc cone mechanism

Abstract

The utility model discloses a rubber arc cone mechanism, including arc cone mechanism subassembly and conic surface friction subassembly, arc cone mechanism subassembly includes the driven shaft of being equipped with coupling key position, install in the conic surface of arc cone mechanism end face and the key of the key of arc cone mechanism and driven shaft, the arc cone surface of arc cone mechanism is connected with two end support surface through bolt, the conic surface friction subassembly includes rubber friction block, and the rubber friction block of the area of design adaptation is fixed on the arc cone surface of arc cone mechanism, in the movement process, the rubber friction block of arc cone surface and the occlusal head friction contact of ball umbrella friction subassembly, when occlusal head rotates, drive arc cone mechanism rotates to mobilize driven shaft rotation. This mechanism is applicable to the transmission coupling of ball umbrella type stepless speed changer to provide more smooth gear shift change curve.

Description

Technical Field

[0001] This utility model relates to the field of friction transmission technology, specifically to a rubber arc cone mechanism. Background Technology

[0002] Existing continuously variable transmissions (CVTs) mainly include mechanical CVTs and metal belt CVTs. Mechanical CVTs change speed by altering the distance between the chain and the pulleys; metal belt CVTs change speed by altering the rotation radius of the transmission belt. Their main disadvantages are as follows: 1. They require complex automatic control systems to manage the speed change process. Mechanical CVTs require control over the distance between the chain and pulleys, while metal belt CVTs require control over the rotation radius of the transmission belt, making it impossible to achieve gear ratio changes solely through mechanical motion. 2. Existing transmission belts have complex structures, increasing manufacturing and maintenance difficulties. 3. The limited turning radius of the transmission belt restricts the size of the transmission. 4. Due to their changing principles, mechanical CVTs and metal belt CVTs have relatively small speed ranges.

[0003] Therefore, a new transmission needs to be designed to solve the problems of the continuously variable transmission (CVT) mentioned above. At the same time, a driven transmission coupling mechanism suitable for the corresponding CVT should be designed to achieve correct transmission. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a rubber arc cone mechanism suitable for a novel ball-and-umbrella contact continuously variable transmission (CVT). This transmission can solve the problems in existing power transmission processes.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A rubber arc-cone mechanism is provided, comprising an arc-cone mechanism assembly and at least one conical friction assembly corresponding to the arc-cone mechanism assembly. The arc-cone friction assembly includes a drive shaft on which the arc-cone mechanism is mounted, a rubber block that conforms to the arc-cone surface, a transmission shaft assembly for mounting the arc-cone mechanism, a key connecting the arc-cone mechanism and the transmission shaft, and a frustum support surface mounted on the end face of the arc-cone mechanism. The support surface is coupled to the transmission shaft via a corresponding key, and the arc-cone mechanism and the frustum support surface are connected by bolts. The generatrix of the arc-shaped mechanism is an arc. The conical friction assembly includes a rubber friction block, the designed rubber friction block of appropriate area fully conforming to the surface of the arc-cone surface, while the generatrix of the arc-cone surface coincides with the movement trajectory of the engagement head.

[0007] Among them, the possible arrangements for use with the corresponding spherical umbrella-type continuously variable transmission are:

[0008] 1. A ball-and-umbrella friction assembly is provided, and a rubber arc-cone mechanism is provided. The engagement head of the ball-and-umbrella friction assembly contacts the outer curved surface of the frustum of the arc-cone friction assembly. When the ball-and-umbrella contact continuously variable transmission is working, the engagement head of the ball-and-umbrella friction assembly and the outer curved surface of the frustum of the arc-cone friction assembly transmit power through friction.

[0009] 2. There is one ball-and-umbrella friction assembly and multiple rubber arc-cone mechanisms. The arc-face friction assemblies are evenly distributed around the ball-and-umbrella friction assembly in the circumferential direction, and the frustum of each arc-face friction assembly is in contact with the engagement head of the ball-and-umbrella friction assembly. When the ball-and-umbrella contact continuously variable transmission is working, the engagement head of the ball-and-umbrella friction assembly rubs against the outer curved surface of the frustum of each arc-face friction assembly, transmitting the power of the ball-and-umbrella friction assembly to other arc-face friction assemblies, thus achieving uniform power distribution.

[0010] 3. Multiple ball-and-umbrella friction assemblies and one rubber arc-cone mechanism are provided. The ball-and-umbrella friction assemblies are evenly distributed around the arc-surface friction assembly in the circumferential direction, and the engagement head of each ball-and-umbrella friction assembly is in contact with the frustum of the arc-surface friction assembly. When the ball-and-umbrella contact continuously variable transmission is working, the outer curved surface of the frustum of the arc-surface friction assembly rubs against the engagement head of the ball-and-umbrella friction assembly, transmitting power from multiple ball-and-umbrella friction assemblies to the arc-surface friction assembly, thus achieving power coupling.

[0011] The frustum support surface has a keyway inside, through which the driven shaft passes and is fixedly connected to the frustum support surface. The frustum support surface is designed in a flat cylindrical shape, providing good support capacity.

[0012] The conical mechanism assembly includes a driven shaft with coupling keys, a frustum support surface mounted on the end face of the conical mechanism, and a key connecting the conical mechanism and the driven shaft. A keyway is formed on the driven shaft, the frustum support surface and the driven shaft are connected by corresponding keys, and the conical surface of the conical mechanism is connected to the two end support surfaces by bolts.

[0013] The arc-cone mechanism assembly includes a driven shaft, with a truncated cone support surface fixed to both sides of the driven shaft. A key is placed between the truncated cone support surface and the driven shaft, providing a keyed connection. When the drive shaft rotates, it drives the driven shaft to rotate, generating centrifugal force in the meshing arm. This centrifugal force is transmitted to the slider via a connecting rod, compressing the spring and causing deformation, which in turn generates a reaction force on the slider. Under the combined action of the reaction force and the centrifugal force, the slider reaches a state of equilibrium. Due to the displacement of the slider, the opening angle of the meshing arm changes. Simultaneously, the corresponding contact head extends along the arc-cone surface of the arc-cone mechanism, changing the transmission ratio of the ball-and-socket continuously variable transmission.

[0014] The conical mechanism component includes a conical surface with a frustum-shaped support end face mounted on it, which is fixed to the driven shaft by a key. The conical surface unfolds in an arc shape along its circumferential direction to form a calculable transmission ratio. The internal design is a hollow structure, with radial pressure borne by the frustum-shaped support surfaces at both ends.

[0015] The arc-cone mechanism assembly also includes a frustum support surface. A keyway is formed inside the frustum support surface, through which the driven shaft passes, thus fixing the frustum support surface and the driven shaft together. The frustum support surface is designed in a flattened cylindrical shape, providing excellent support capabilities.

[0016] The arc-shaped friction component includes a friction rubber block. The friction rubber block is designed to fully fit the surface of the arc-shaped conical surface, while the generatrix of the arc-shaped conical surface coincides with the movement trajectory of the engagement head.

[0017] The working process of the rubber arc cone mechanism of the ball-and-umbrella contact continuously variable transmission in this application is as follows: the drive shaft of the transmission rotates, the meshing arm opens, and the meshing head contacts and rubs with the friction rubber block of the arc cone surface, thereby driving the arc cone mechanism to rotate and realizing continuously variable friction transmission.

[0018] Compared with existing technologies, the designed rubber arc cone mechanism realizes friction transmission with the ball umbrella type continuously variable transmission, and has significant advantages such as smaller size, lower energy loss, smoother operation, large transmission ratio range, and simple maintenance. Attached Figure Description

[0019] Figure 1 is a top view of the continuously variable transmission based on the rubber arc cone mechanism in the embodiment in a static state;

[0020] Figure 2 is a cross-sectional view of the continuously variable transmission based on the rubber arc cone mechanism in the embodiment in a static state;

[0021] Figure 3 is a top view of the ball umbrella friction assembly in the open state in the embodiment;

[0022] Figure 4 is a top view of the rubber arc cone mechanism in the embodiment;

[0023] Figure 5 is a left view of the rubber arc cone mechanism in the embodiment.

[0024] Reference numerals: drive shaft 001, rotary disk 002, hemispherical support 003, meshing arm 004, meshing head 005, connecting rod 006, slider 007, driven shaft 008, frustum 009, spring 010, first track groove 031, rubber arc cone mechanism 102, right end support surface of arc cone 103, arc cone surface 104, left end support surface of arc cone 105, multi-step driven shaft 106, threaded hole 107, mating and fixing keyway 108. Detailed Implementation

[0025] The present invention will be further described in conjunction with the following embodiments.

[0026] One specific embodiment of this utility model in conjunction with a ball-and-umbrella contact continuously variable transmission is shown in Figure 1- Figure 5 It includes a ball-and-umbrella friction assembly and a rubber arc-cone mechanism. This embodiment is illustrated by taking its application in an air conditioner continuously variable transmission as an example. The ball-and-umbrella friction assembly and the rubber arc-cone mechanism are arranged opposite to each other.

[0027] In this embodiment, the engagement head 005 and the truncated cone 009 make frictional contact with each other to transmit power. When the ball-and-umbrella contact continuously variable transmission is working, the drive shaft 001 rotates, driving the rotating disk 002 to rotate, which in turn drives the engagement arm 004 to rotate. The engagement head 005 on the engagement arm 004 makes frictional contact with the truncated cone 009, generating frictional force, which drives the truncated cone 009 to rotate, and then drives the driven shaft 008 to rotate, completing the power transmission process.

[0028] In this embodiment, when the rotating disk 002 rotates, it drives the meshing arm 004 to rotate. The rotation of the meshing arm 004 generates centrifugal force, which is transmitted to the slider 007 via the connecting rod 006, compressing the spring 010 and causing the meshing arm 004 to open, resulting in a change in the transmission ratio. After a period of time, the centrifugal force and the spring elastic force balance, maintaining a constant transmission ratio. Clearly, as the rotational speed of the rotating disk 002 increases, the opening angle of the meshing arm 004 also increases. Through structural constraints, the opening angle range is ensured to be 0~90°. The drive shaft 001, meshing arm 004, connecting rod 006, and slider 007 form a crank-slider system, simultaneously limiting the opening angle of the meshing arm 004 to between 0~90°, ensuring that the power transmission of the ball-and-umbrella contact continuously variable transmission (CVT) can proceed normally, and that the transmission ratio range is larger than that of a traditional CVT. Meanwhile, the spring 010 installed on the drive shaft 001 can generate a reaction force on the slider 007 by compressing the spring 010, so that the force on the slider 007 in the axial direction of the drive shaft 001 reaches a balanced state, ensuring the consistency of the transmission ratio of the ball-and-umbrella contact continuously variable transmission (CVT) under stable external input signal conditions. Furthermore, the variable transmission ratio function of the ball-and-umbrella contact CVT does not require an external control system; it can achieve changes in transmission ratio through its own force balance. Compared to other CVTs, it eliminates the need for a complex control system, ensuring the stability of the ball-and-umbrella contact CVT.

[0029] In this embodiment, a keyway 108 is provided between the right end support surface 103 and the left end support surface 105 of the arc cone and the driven shaft 106, and a key connection is provided. When the drive shaft 001 rotates, it drives the driven shaft 008 to rotate, and the meshing arm 004 generates centrifugal force. The centrifugal force is transmitted to the slider through the connecting rod. The slider compresses the spring, and the spring deforms, generating a reaction force on the slider. Under the combined action of the reaction force and the centrifugal force, the slider reaches a state of equilibrium. Due to the displacement of the slider, the opening angle of the meshing arm changes. At the same time, the corresponding contact head extends along the surface 104 of the arc cone mechanism, thereby changing the transmission ratio of the ball-and-umbrella continuously variable transmission.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A rubber arc-cone mechanism, characterized in that: Includes an arc-cone mechanism assembly and a conical friction assembly; The arc-cone mechanism assembly includes a driven shaft with coupling keys, a frustum support surface mounted on the end face of the arc-cone mechanism, and a key connecting the arc-cone mechanism and the driven shaft. A keyway is formed on the driven shaft, and the frustum support surface and the driven shaft are connected by corresponding keys. The arc-cone surface of the arc-cone mechanism is bolted to the support surfaces at both ends. During operation, when the drive shaft of the ball-and-umbrella gearbox rotates, it drives the rotating disk to rotate. The rotating disk drives the meshing arm to rotate, and the meshing head on the meshing arm makes frictional contact with the frustum of the conical friction assembly, thereby driving the driven shaft to rotate and achieving transmission. The conical friction assembly includes rubber friction blocks, with a designed, adaptable area of ​​rubber friction blocks fixedly attached to the arc-cone surface of the arc-cone mechanism. During operation, the rubber friction blocks on the arc-cone surface make frictional contact with the meshing head of the ball-and-umbrella friction assembly. When the meshing head rotates, it drives the arc-cone mechanism to rotate, thereby causing the driven shaft to rotate.

2. The rubber arc-cone mechanism according to claim 1, characterized in that: The arc-cone mechanism assembly includes a driven shaft, with a truncated cone support end face fixed to both sides of the driven shaft. A key is placed between the truncated cone support surface and the driven shaft, and a key connection is provided. When the drive shaft rotates, it drives the driven shaft to rotate, and the meshing arm generates centrifugal force. The centrifugal force is transmitted to the slider through the connecting rod. The slider compresses the spring, and the spring deforms, generating a reaction force on the slider. Under the combined action of the reaction force and the centrifugal force, the slider reaches a state of equilibrium. Due to the displacement of the slider, the opening angle of the meshing arm changes. At the same time, the corresponding contact head extends along the surface of the arc-cone mechanism, changing the transmission ratio of the ball-and-umbrella continuously variable transmission.

3. The rubber arc-cone mechanism according to claim 1, characterized in that: The arc-cone mechanism assembly includes an arc-cone surface, on which a frustum support surface is mounted and connected to the driven shaft via a key. The arc-shaped conical surface unfolds in an arc along its circumferential direction to form a calculable transmission ratio. The interior is designed with a hollow structure, and the radial pressure is borne by the support surfaces of the two conical truncated surfaces.

4. The rubber arc-cone mechanism according to claim 3, characterized in that: The arc-cone mechanism assembly also includes a frustum support surface; the frustum support surface has a keyway inside, and the driven shaft passes through the frustum support surface through the key connection, and the frustum support surface is fixedly connected to the driven shaft; the frustum support surface is designed in the shape of a flat cylinder and has the ability to support.

5. The rubber arc-cone mechanism according to claim 1, characterized in that: The conical friction assembly includes a rubber friction block, which is designed to fully conform to the surface of the arc-conical surface, while the generatrix of the arc-conical surface coincides with the movement trajectory of the engagement head.

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