CN106352061A - Cooling device of continuously variable transmission - Google Patents

Abstract

The invention relates to a cooling device for a continuously variable transmission, in particular to a cooling device for a self-suction continuously variable transmission. A pulley drive shaft oil channel is opened in the drive shaft along the axial direction, and at least one of the pulley fixed plate and the pulley moving plate is provided with an oil hole penetrating from the inside to the outside, and the oil hole communicates with the pulley drive shaft oil channel. The cooling device of the continuously variable transmission has the advantages of simple structure, low cost and high cooling efficiency.

Description

A cooling device for a continuously variable transmission

technical field

The invention relates to a cooling device for a continuously variable transmission, in particular to a cooling device for a self-suction type continuously variable transmission.

Background technique

Continuously variable transmission can carry out stepless transmission within a certain speed ratio range, it can improve the fuel economy and driving comfort of the car, and is widely installed on cars. In a continuously variable transmission, the driving pulley drives the transmission belt, and the transmission belt drives the driven pulley. The transmission belt is usually made of metal, which will generate a lot of heat during operation, so it is necessary to dissipate heat from the transmission belt and the driving and driven pulleys.

The utility model patent with the application number 201220173107.2 "a heat dissipation mechanism for a continuously variable transmission" dissipates heat from the transmission by setting a number of integrated heat dissipation blades on the outside of the pulley disc, and the utility model patent with the application number 201120306684. The spiral heat dissipation structure of the multi-stage transmission "sets spiral heat dissipation fins on the outer side of the pulley disc. The heat dissipation devices of these two patents all adopt air heat dissipation. The continuously variable transmission involved in the present invention is a closed continuously variable transmission device installed inside the automobile. There are certain limitations in adopting air heat dissipation. Due to the airtight continuously variable transmission A certain amount of continuously variable transmission oil will be injected into the engine for heat dissipation, because of the structural limitation of the transmission itself, there will be insufficient heat dissipation.

Contents of the invention

In order to solve the problem of low heat dissipation efficiency of the continuously variable transmission in the prior art, the present invention provides a heat dissipation device of the continuously variable transmission with high heat dissipation efficiency.

The technical solution adopted by the present invention to solve its technical problems is:

A heat dissipation device for a continuously variable transmission, comprising a pulley drive shaft, a pulley fixed plate and a pulley moving plate arranged on the pulley drive shaft, and a pulley drive shaft oil is provided in the pulley drive shaft along the axial direction. At least one of the pulley fixed plate and the pulley moving plate is provided with an oil hole penetrating from the inside to the outside, and the oil hole communicates with the pulley drive shaft oil passage.

Further, the fixed plate of the pulley is provided with an oil hole of the fixed plate of the pulley which communicates with the oil passage of the transmission shaft.

Further, the pulley drive shaft is evenly distributed in the upper direction of the pulley drive shaft with pulley drive shaft oil holes communicating with the pulley drive shaft oil passage, and the pulley fixed plate oil holes are evenly distributed along the pulley fixed plate circumferential direction and connected to the pulley drive shaft. The oil holes of the transmission shaft correspond one by one.

Further, the oil hole of the fixed plate of the pulley is arranged along the radial direction of the fixed plate of the pulley.

Further, the end of the pulley transmission shaft is provided with an oil suction end cover, and the inner cavity of the oil suction end cover communicates with the oil channel of the pulley transmission shaft.

Further, the oil suction end cap is provided with an oil suction pipe, and the oil suction pipe communicates with the inner cavity of the oil suction end cap.

Further, a sealed bearing is provided between the oil suction end cover and the pulley drive shaft.

Beneficial effect:

(1) When the pulley rotates, the CVT oil at the bottom of the CVT is sucked into the pulley transmission shaft oil passage and the pulley fixed disk oil hole through the oil suction pipe and the oil suction end cover, and finally thrown out. The transmission dissipates heat, and realizes heat dissipation during the working process, with simple structure, low cost and high heat dissipation efficiency;

(2) The flow rate of continuously variable transmission oil entering the oil channel of the pulley drive shaft and the oil hole of the pulley fixed plate is related to the speed of the speed of the pulley plate of the continuously variable transmission. When the speed of the pulley is slower, the flow rate of the continuously variable transmission oil The smaller the heat dissipation rate, the lower the heat dissipation rate. When the speed of the pulley is faster, the flow rate of CVT oil is greater, and the heat dissipation rate is higher. The heat also increases with the increase of the rotating speed, therefore, the heat dissipation effect of the present invention matches the heat generation in the working process, and produces a better heat dissipation effect on the continuously variable transmission;

(3) The oil holes of the fixed plate of the pulley are evenly distributed along the circumferential direction of the fixed plate of the pulley, and are arranged along the radial direction of the fixed plate of the pulley.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of pulley transmission shaft of the present invention;

Fig. 2 is the structural representation of pulley fixed plate of the present invention;

Fig. 3 is a schematic structural view of an oil suction end cap and an oil suction pipe of the present invention;

Fig. 4 is a structural schematic diagram of a sealed bearing of the present invention;

Fig. 5 is a schematic diagram of the assembly of the pulley fixed plate and the pulley drive shaft of the present invention;

Fig. 6 is a schematic assembly diagram of the heat sink of the present invention.

Among them, 1. Pulley drive shaft, 2. Pulley drive shaft oil hole, 3. Pulley drive shaft oil passage, 4. Pulley fixed plate, 5. Pulley fixed plate oil hole, 6. Oil suction end cover, 7 , Oil suction pipe, 8, sealed bearing, 9, pulley moving plate.

detailed description

As shown in Fig. 1-6, a cooling device for a continuously variable transmission includes a pulley drive shaft 1, a pulley fixed plate 4 and a pulley moving plate 9 arranged on the pulley drive shaft 1, and the inside of the pulley drive shaft 1 along the shaft There is a pulley drive shaft oil passage 3, at least one of the pulley fixed plate 4 and the pulley moving plate 9 is provided with an oil hole penetrating from the inside to the outside, and the oil hole communicates with the pulley drive shaft oil passage 3 . In this embodiment, the pulley fixed plate 4 is provided with a pulley fixed plate oil hole 5 communicating with the pulley drive shaft oil passage 3 .

As shown in Figure 1-6, the pulley drive shaft 1 is evenly distributed in the circumferential direction with pulley drive shaft oil holes 2 communicating with the pulley drive shaft oil passage 3, and the pulley fixed plate oil holes 5 are evenly distributed along the circumferential direction of the pulley fixed plate 4 and connected with the pulley drive shaft oil passage 3. The oil holes 2 of the pulley transmission shaft correspond one to one. The pulley fixed plate oil hole 5 is arranged along the radial direction of the pulley fixed plate 4 . The end of the pulley transmission shaft 1 is provided with an oil suction end cover 6, and the inner chamber of the oil suction end cover 6 communicates with the pulley transmission shaft oil passage 3. An oil suction pipe 7 is arranged on the oil suction end cover 6 , and the oil suction pipe 7 communicates with the inner cavity of the oil suction end cover 6 . A sealed bearing 8 is arranged between the oil suction end cover 6 and the pulley transmission shaft 1 . The rotation of the pulley transmission shaft drives the inner ring of the sealed bearing to rotate, and the oil-absorbing end cover 6 matched with the outer ring of the sealed bearing can rotate freely.

work process:

When the CVT is running, the air in the oil hole 5 of the pulley fixed plate is thrown out, so that the air in the oil passage 3 of the pulley transmission shaft decreases, and under the action of atmospheric pressure, the CVT oil at the bottom of the CVT It is squeezed into the oil suction pipe 7 to reach the oil suction end cover 6, enters the pulley drive shaft oil passage 3, enters the pulley fixed plate oil hole 5 from the pulley drive shaft oil passage 3, and is finally thrown out. The thrown CVT oil takes away the heat in the pulley transmission shaft 1 and the pulley fixed plate 4 to dissipate heat from the CVT.

It should be understood that the specific embodiments described above are only used to explain the present invention, not to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (7)

1. a continuously variable transmission cooling device, characterized in that: comprise a pulley drive shaft (1) and a pulley fixed plate (4) and a pulley moving plate (9) that are arranged on the pulley drive shaft (1), The pulley drive shaft (1) is provided with a pulley drive shaft oil passage (3) in the axial direction, and at least one of the pulley fixed plate (4) and the pulley moving plate (9) is provided with An oil hole penetrating from the inside to the outside, the oil hole communicates with the pulley transmission shaft oil passage (3). 2. A kind of heat dissipation device for continuously variable transmission according to claim 1, characterized in that: said pulley fixed plate (4) is provided with a pulley fixed plate communicated with the pulley transmission shaft oil passage (3) Oil hole (5). 3. A kind of heat dissipation device for continuously variable transmission according to claim 2, characterized in that: said pulley drive shaft (1) is evenly distributed in the circumferential direction and is provided with a pulley drive shaft communicating with the pulley drive shaft oil passage (3). Shaft oil holes (2), the pulley fixed plate oil holes (5) are evenly distributed along the circumference of the pulley fixed plate (4) and correspond to the pulley drive shaft oil holes (2) one by one. 4. A kind of continuously variable transmission cooling device according to claim 3, is characterized in that: described pulley fixed plate oil hole (5) is arranged along the radial direction of pulley fixed plate (4). 5. A kind of continuously variable transmission cooling device according to claim 1, characterized in that: the end of the pulley transmission shaft (1) is provided with an oil-absorbing end cap (6), and the oil-absorbing end cap (6) The inner cavity communicates with the pulley drive shaft oil passage (3). 6. A kind of continuously variable transmission cooling device according to claim 5, is characterized in that: described oil suction end cover (6) is provided with oil suction pipe (7), described oil suction pipe (7) and oil suction end The inner cavity of the cover (6) communicates. 7. A continuously variable transmission cooling device according to claim 5, characterized in that: a sealed bearing (8) is provided between the oil suction end cover (6) and the pulley transmission shaft (1).