CN206958215U - A kind of power takeoff - Google Patents

Abstract

The utility model relates to the technical field of automobile transmissions, and specifically discloses a power take-off applied to automobile transmissions, which at least includes a piston and a cylinder. The cylinder is provided with a piston cavity matching the piston, and the cylinder is provided with a The air intake hole communicates with the cavity, and a sealing structure is provided between the outer wall of the piston and the inner wall of the piston cavity, and the sealing structure includes at least a Y-shaped sealing ring, and the opening of the Y-shaped sealing ring faces the side of the air intake hole . In the power take-off of the utility model, the sealing structure adopts a Y-shaped sealing ring, and the opening of the Y-shaped sealing ring faces the side of the air inlet. The effect of the pressure will be deformed to both sides, the greater the air pressure, the greater the deformation, the greater the expansion force, and the better the sealing. In addition, an O-ring is provided on the side of the Y-ring away from the air inlet, which further enhances the sealing performance of the sealing structure and at the same time isolates the right gear oil from entering.

Description

a power take-off

technical field

The utility model relates to the technical field of automobile transmissions, in particular to a power take-off applied to automobile transmissions.

Background technique

At present, due to the different positioning of the vehicle, many vehicles require additional power output, and the application of the power take-off is to meet this demand. Due to different actual working conditions, power take-offs are also divided into long-term work (such as sprinkler trucks) and short-time work (such as dump trucks). The power take-off that works for a long time has higher requirements on the sealing of the power take-off cylinder. At present, the commonly used power take-off is sealed by an O-ring. For the power take-off that works for a long time, its service life is limited. Therefore, it is necessary to optimize the sealing structure of the existing power take-off.

Contents of the invention

The technical problem to be solved by the utility model is to provide a power take-off structure with an optimized sealing structure to solve the technical defect of the prior art that the power take-off has a short service life under long-term working conditions.

In order to solve the above-mentioned technical problems, the technical solution provided by the utility model is as follows: a power take-off, at least including a piston and a cylinder, the cylinder is provided with a piston chamber matching the piston, and the cylinder is provided with a cylinder communicating with the piston chamber. A sealing structure is provided between the outer wall of the piston and the inner wall of the piston chamber, the sealing structure at least includes a Y-shaped sealing ring, and the opening of the Y-shaped sealing ring faces the side of the air inlet.

A preferred embodiment, the piston is provided with a sealing groove 1, and the Y-shaped sealing ring is installed in the sealing groove 1.

A preferred embodiment, the sealing structure also includes an O-ring, the piston is provided with a sealing groove 2, the sealing groove 2 is located on the side of the sealing groove 1 away from the air inlet, and the O-shaped sealing The ring is installed in the second sealing groove.

A preferred embodiment, the Y-shaped sealing ring and the O-shaped sealing ring are rubber seals.

In the power take-off of the utility model, the sealing structure adopts a Y-shaped sealing ring, and the opening of the Y-shaped sealing ring faces the side of the air inlet. The effect of the pressure will be deformed to both sides, the greater the air pressure, the greater the deformation, the greater the expansion force, and the better the sealing. In addition, an O-ring is provided on the side of the Y-ring away from the air inlet, which further enhances the sealing performance of the sealing structure and at the same time isolates the right gear oil from entering.

Description of drawings

Fig. 1 is the structural representation of the piston of the present embodiment;

Fig. 2 is a schematic diagram of the assembly structure of the cylinder and the piston in the power take-off of this embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1 and 2, a power take-off in this embodiment at least includes a piston 1 and a cylinder 7, wherein the cylinder 7 is provided with a piston chamber 8 matching the piston 1, and the cylinder 1 is provided with a The air intake hole 9 communicated with the chamber 8, and a sealing structure is provided between the outer wall of the piston 1 and the inner wall of the piston chamber 8.

As the biggest improvement of this embodiment, the sealing structure at least includes a Y-shaped sealing ring 4, and the specific structure is that the piston 1 is provided with a sealing groove-2, and the Y-shaped sealing ring 4 is installed in the sealing groove-2. In addition, the opening 5 of the Y-shaped sealing ring 4 faces the side of the air inlet 9 . The advantage of this structure is that when the power take-off is working, the air is fed from the air inlet, and the Y-shaped sealing ring will be deformed to both sides due to the action of air pressure. The greater the air pressure, the greater the deformation and the greater the expansion force, thus sealing Better performance; even if the power take-off works continuously for a long time, the stability of the sealing structure is better and the service life is longer.

A preferred embodiment, the sealing structure also includes an O-shaped sealing ring 6, wherein the piston 1 is provided with a sealing groove 2 3, and the sealing groove 2 3 is located on the side of the sealing groove 2 away from the air inlet 9, so The O-ring is installed in the second sealing groove. In this structure, the O-ring 6 is combined with the Y-ring 4 to form a double seal, and the sealing performance is better, so that the service life of the power take-off is longer, and the O-ring 6 isolates the right gear oil from entering, reducing the The sealing pressure of the Y-shaped sealing ring 4.

In a word, the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall include Within the protection scope of the present utility model.

Claims (4)

1. A power take-off, comprising at least a piston and a cylinder, wherein the cylinder is provided with a piston cavity matching the piston, and the cylinder is provided with an air intake hole communicating with the piston cavity, characterized in that the piston cavity A sealing structure is provided between the outer wall and the inner wall of the piston cavity, and the sealing structure at least includes a Y-shaped sealing ring, and the opening of the Y-shaped sealing ring faces the air inlet side. 2. The power take-off according to claim 1, wherein a sealing groove 1 is provided on the piston, and the Y-shaped sealing ring is installed in the sealing groove 1. 3. The power take-off according to claim 1 or 2, wherein the sealing structure further includes an O-ring, the piston is provided with a sealing groove 2, and the sealing groove 2 is located away from the sealing groove 1 On one side of the air inlet, the O-ring is installed in the second sealing groove. 4. The power take-off according to claim 3, wherein the Y-shaped sealing ring and the O-shaped sealing ring are rubber seals.