CN204878566U - Combined type infinitely variable transmission - Google Patents

Abstract

The utility model provides a combined type infinitely variable transmission, belongs to infinitely variable transmission design and manufacturing field. The device includes metal silent chain and oscillating tooth gear, and the terminal surface design of the chain both sides chain link of metal silent chain makes both sides chain terminal surface and awl dish terminal surface contact just for be same numerical value with awl dish circular conical surface generating line for the inclination of vertical direction to be the fillet with the top and the root design of terminal surface. The device possesses and has extended oscillating tooth buncher's function, and it can bear big torque, and high transmission efficiency, simple structure, the device can realize the control that steps up of chain and cone pulley better to can reduce the wearing and tearing of metallic bond and cone pulley to a certain extent, extension fixture life. The device adopts tendency drive and the compound kind of drive that the meshing transmission combines, can effectively solve the defect that traditional oscillating tooth buncher starting stage exists to can adopt different kind of drive according to different work condition, but wide application in high -speed and high -power vehicle, industry field.

Description

Compound continuously variable transmission

technical field

The utility model belongs to the technical field of design and manufacture of continuously variable speed transmission devices.

Background technique

Gear transmission is a widely used transmission mechanism in the mechanical field, but this mechanism has high manufacturing precision and installation precision, and its transmission ratio is fixed, so it cannot realize stepless speed change. With the rapid development of science and technology, continuously variable transmission is widely used in the automobile industry as an ideal transmission. Patent 200580039668.6 (slide deformed teeth stepless meshing movable gear, authorized announcement date: June 10, 2009, authorized announcement number: CN100498006C) introduces a sliding sheet deformed movable tooth stepless meshed movable gear device, the movable teeth have no The variable speed device is a new type of continuously variable transmission based on the theory of movable tooth meshing. This movable tooth continuously variable transmission is a non-friction deformation movable tooth continuously variable transmission device. The traction transmission mode breaks through the inherent power/efficiency barrier of continuously variable transmission, and can realize high-power and high-efficiency transmission of power.

However, there are still great defects in this traditional sliding vane deformation movable tooth CVT. One is that the chain will slip when the centrifugal force is not enough to make the sliding vane throw out at the initial stage; Reasonable, axial clamping through the contact between the pin body and the cone wheel is not reliable, the friction between the chain and the cone wheel is small, and the eccentric phenomenon of the chain during speed regulation will cause the root, top and cone of the pin body Disc contact, running for a long time can damage metal chain and conical disc, reduce its life-span; The 3rd, there is no tensioning device of chain, the loosening of chain can affect the normal transmission of chain.

Contents of the invention

The utility model is an innovative improvement on the basis of the patent 200580039668.6 (slide deformed tooth stepless meshing live gear, authorized announcement date: June 10, 2009, authorized announcement number: CN100498006C), the main purpose is to design a composite The continuously variable transmission device can carry large torque, has high transmission efficiency and simple structure. More importantly, the utility model can solve many defects of the traditional movable tooth continuously variable transmission, and is based on the traditional movable tooth continuously variable transmission. The innovation and development can be widely used in high-speed and high-power vehicles and industrial fields.

A compound continuously variable transmission device, including a metal toothed chain and a live gear, is characterized in that the end faces of the chain links on both sides of the metal toothed chain are designed to be inclining to the generatrix of the conical surface of the conical disc relative to the vertical direction For the same value, make the end faces of the chains on both sides exactly in contact with the end faces of the cone, and design the top and root of the end faces as rounded corners. The chain link in the middle is an ordinary metal chain link, and the bottom of all chain links has chain teeth, and the chain links are connected into a chain through a pin body; the movable gear includes a bevel wheel and a movable tooth body, and each movable gear has a movable tooth body, and each movable gear has a movable tooth body. The movable tooth body has a movable tooth groove, and the movable tooth groove is equipped with a movable tooth piece. The up and down movement of the drive chain pushes the chain to move up and down to complete the change of the diameter of the driving and driven wheel chain and realize the adjustment of the speed ratio.

The application of the compound continuously variable transmission device is characterized in that it combines two transmission modes of movable tooth continuously variable transmission and traditional continuously variable transmission. When the centrifugal force in the initial stage is not enough to throw out the movable gear, the friction transmission is used to control the axial clamping force of the cone to clamp the metal toothed chain, and the metal toothed chain increases the friction between the chain and the cone wheel, and the metal Power is transmitted between the chain and the cone through friction. As the rotational speed increases, the centrifugal force increases, and the movable tooth piece is thrown out from the movable tooth groove and meshed with the metal chain teeth, which is the meshing transmission; the hydraulic device can control the axial clamping force of the bevel wheel to clamp the metal chain.

The utility model designs a new type of metal tooth chain, which is an innovative improvement on the basis of the traditional metal tooth chain. The end face of the chain link is designed to be the same value as the inclination angle of the conical surface generatrix of the conical disc relative to the vertical direction, so that the end faces of the chains on both sides are just in contact with the end face of the conical disc, and the top and root corners are designed as rounded corners. This new type of metal chain is proposed mainly to better realize the tightening control of the bevel wheel and the metal toothed chain. The design of the metal toothed chain can increase the contact friction between the chain and the bevel wheel. When the bevel wheel moves axially It can make the cone wheel better clamp the chain and reduce the chance of slipping. At the same time, the design of this new metal toothed chain can also reduce the wear of the chain and the bevel wheel to a certain extent.

Another innovative point of the utility model is that the compound continuously variable transmission device combines two transmission modes of movable tooth continuously variable transmission and traditional continuously variable transmission. When the centrifugal force in the initial stage is not enough to make the sliding plate throw out, the friction transmission of the traditional continuously variable transmission is used to control the axial clamping force of the cone to tighten the metal chain. At the same time, the new metal chain designed in the utility model can be used to Realize the tightening control of bevel wheel and metal toothed chain effectively. As the rotating speed increases, the centrifugal force increases, and the sliding plate is thrown out from the movable tooth groove and meshed with the metal sprocket, which is the meshing transmission. At this time, an appropriate transmission mode can be adopted according to the specific working conditions. In addition, since the utility model adds friction transmission on the basis of meshing transmission, the hydraulic device can control the axial clamping force of the cone wheel to tighten the metal chain, so the tension of the metal chain can be controlled without other chain tensioning devices. tight.

To sum up, the utility model has the following characteristics: the utility model belongs to a new type of compound continuously variable transmission device, which can solve many defects of the traditional movable tooth continuously variable transmission, and the friction transmission method can fundamentally solve the traditional movable tooth infinitely variable transmission. Defects in the initial stage of variable speed transmission; the utility model proposes a new type of metal toothed chain, which can increase the contact friction between the chain and the cone wheel, so that the chain and the cone wheel can be tightened and controlled well. And it can reduce the wear of the chain and the cone wheel to a certain extent; the utility model adopts a compound transmission mode combining two transmission modes—friction transmission and meshing transmission, the friction transmission can avoid the slipping phenomenon in the initial stage, and the meshing transmission can Realize high-torque transmission, and different transmission modes can be selected according to specific working conditions; the utility model can control the axial clamping force of the cone disc through a hydraulic device, thereby realizing the tension control of the metal chain.

Description of drawings

Figure 1 is a schematic diagram of the structure of the new metal toothed chain.

Fig. 2 is a schematic diagram of the structure of the movable gear (when the movable tooth and the sprocket are not meshed).

Fig. 3 is a schematic diagram of the structure of the movable gear (when the movable tooth meshes with the sprocket).

in:

1. Chain pin 2. Outer link of metal toothed chain

3. Chain tooth of metal tooth chain 4. Ordinary chain link of metal tooth chain

5. Movable gear (bevel wheel) 6. Movable tooth piece

7. Movable tooth slot 8. Movable tooth body

Detailed ways

Embodiment of the present utility model is shown in Fig. 1, Fig. 2, Fig. 3.

The composite continuously variable transmission device designed by the utility model mainly includes a movable bevel wheel and a new metal tooth chain. The schematic diagram of the structure of the new metal toothed chain is shown in Figure 1. The new metal toothed chain is composed of chain links and pin bodies. The end faces of the chain links on both sides of the chain are designed to be inclination angles relative to the vertical direction of the conical surface generatrix of the conical disk The value is the same, so that the end faces of the chains on both sides are just in contact with the end faces of the cone discs. When the cone discs are clamped axially, the chains can withstand greater force without slipping. The contact between the chain and the cone discs increases, and the friction increases. Better control of chain and bevel clamping. The top and bottom of the inclined surfaces of the chain links at both ends are designed as rounded corners. When adjusting the speed ratio of the continuously variable transmission device, the chain will be eccentric due to the axial movement of the cone disc. The rounded corners of the contact edges at both ends can reduce the The wear of the chain and the bevel wheel caused by the eccentricity of the small chain, the chain link in the middle is an ordinary metal chain link, and the bottom of all the chain links has sprocket teeth, and the chain links are connected by a pin body to form a chain.

The movable gear in the utility model is mainly composed of a bevel wheel and a movable tooth body, each movable gear has four movable tooth bodies, each movable tooth body has two movable tooth grooves, and movable tooth pieces are housed in the movable tooth grooves As shown in Figure 2 and Figure 3, the movable gear has slots along the busbar, and rollers are installed at both ends of the movable gear body. To complete the change of the chain diameter of the driving and driven wheels, so as to realize the adjustment of the speed ratio. Fig. 2 is the positional relationship between the metal chain and the movable tooth when the movable tooth is not meshed with the sprocket, and Fig. 3 is the positional relationship between the metal chain and the movable tooth when the movable tooth is engaged with the sprocket.

The compound continuously variable speed transmission device designed by the utility model adopts two transmission modes, that is, a friction transmission mode and a movable tooth meshing transmission mode. The friction transmission mode is the transmission mode of the traditional continuously variable transmission, which relies on the hydraulic device to push the cone to move axially to clamp the metal chain, and relies on the friction between the metal chain and the cone wheel to transmit power. The new metal toothed chain can increase the friction between the chain and the bevel. The meshing transmission mode is to rely on the meshing of the movable tooth plate and the chain teeth of the new metal tooth chain to transmit power. When the movable tooth plate reaches a certain speed and the centrifugal force is enough to throw the sliding plate out of the movable tooth groove, the movable tooth plate and the chain teeth mesh freely. Form the desired tooth shape and realize stepless meshing. The utility model adopts a compound transmission mode combining two transmission modes, that is, different transmission modes are adopted according to different working conditions. For example, the friction transmission mode is adopted in the initial stage, and the centrifugal force in the initial stage is not enough to make the sliding plate throw out, that is, it cannot When the meshing transmission is realized, the friction transmission can avoid the phenomenon of chain slippage. With the increase of the speed, the centrifugal force is enough to throw the movable tooth piece out to complete the meshing, and the transmission mode can be changed to the meshing transmission to realize the power transmission of large torque. , The meshing state of the movable tooth piece and the sprocket is shown in Figure 3. At the same time, the friction transmission mode can clamp the chain, and the tension of the chain is controlled by controlling the magnitude of the clamping force through the hydraulic device, so this device does not need other tensioning devices.

Claims (1)

1. a combined type infinitely variable speed transmission, comprise tooth profile metal chain and oscillating tooth gear, it is characterized in that, it is same numerical value that the end face of the chain both sides chain link of tooth profile metal chain to be designed to cone dish conical surface bus relative to the inclination angle of vertical direction, both sides chain end face is contacted just with cone dish end face, and the top of end face and root are designed to fillet; Middle chain link is common metal chain link, and all there is sprocket the bottom of all chain links, and chain link connects into chain by shank; Oscillating tooth gear comprises cone pulley and oscillating tooth body, each oscillating tooth gear has oscillating tooth body, each oscillating tooth body has oscillating tooth groove, oscillating tooth groove is built with oscillating tooth sheet, oscillating tooth gear has caulking groove along bus, and oscillating tooth body two ends are provided with roller, and roller embeds in caulking groove and moves up and down along caulking groove, moving up and down of oscillating tooth body promotes the change that chain has moved up and down principal and subordinate wheel diameter chain, realizes the adjustment of speed ratio.