CN214367689U

CN214367689U - Power takeoff

Info

Publication number: CN214367689U
Application number: CN202023124786.8U
Authority: CN
Inventors: 宇文创成; 陈勇; 马凯凯
Original assignee: Shaanxi Fast Auto Drive Group Co Ltd
Current assignee: Shaanxi Fast Auto Drive Group Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-10-08
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a power takeoff, which comprises a power takeoff shell, wherein an output shaft is arranged in the power takeoff shell, and a sliding sleeve is connected to the output shaft through a spline; the power takeoff shell is provided with a cylinder body, a piston fork shaft parallel to the output shaft is arranged in the cylinder body, one end of the piston fork shaft is used as a piston end, the other end of the piston fork shaft is used as a shifting fork shaft end, the piston end is positioned in the cylinder body, the shifting fork shaft end extends out of the cylinder body, and the end part of the shifting fork shaft is inserted into the power takeoff shell; a shifting fork and a return spring are sequentially sleeved at the end of the shifting fork shaft from one end close to the cylinder body to the other end, and a shifting fork head of the shifting fork is connected with the sliding sleeve; one end of the return spring is limited by the shifting fork, and the other end of the return spring is limited by the power takeoff shell. The utility model provides high structural integration, simple structure, the assembly is easy, and is with low costs.

Description

Power takeoff

Technical Field

The utility model relates to a power takeoff specifically is a power takeoff.

Background

The application of power takeoff products in the field of automobile transmission is very wide, and the current mainstream structures at home and abroad are all that the power takeoff is shifted and shifted through pneumatics. An operating device assembly is usually assembled on a power takeoff shell, and a shifting fork in the operating device assembly is used for controlling the axial movement of a sliding sleeve, so that the power takeoff is put into and taken off, and the operating device assembly further comprises a cylinder cover, a cylinder body, a piston, a shifting fork shaft and other parts, so that the power takeoff is complex in structure, complex in assembly and high in cost.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a power takeoff has improved the structural integration degree, simple structure, and the assembly is easy, and is with low costs.

The utility model discloses a realize through following technical scheme:

a power takeoff comprises a power takeoff shell, wherein an output shaft is arranged in the power takeoff shell, and a sliding sleeve is connected to the output shaft through a spline;

the power takeoff shell is provided with a cylinder body, a piston fork shaft parallel to the output shaft is arranged in the cylinder body, one end of the piston fork shaft is used as a piston end, the other end of the piston fork shaft is used as a shifting fork shaft end, the piston end is positioned in the cylinder body, the shifting fork shaft end extends out of the cylinder body, and the end part of the shifting fork shaft is inserted into the power takeoff shell;

a shifting fork and a return spring are sequentially sleeved at the end of the shifting fork shaft from one end close to the cylinder body to the other end, and a shifting fork head of the shifting fork is connected with the sliding sleeve; one end of the return spring is limited by the shifting fork, and the other end of the return spring is limited by the power takeoff shell.

Preferably, the part of the output shaft, which is positioned in the power takeoff shell, comprises a first shaft section and a second shaft section which are sequentially connected, and the diameter of the first shaft section is larger than that of the second shaft section;

the sliding sleeve is connected to the first shaft section through a spline, the second shaft section is provided with an output gear, the outer surface of one end, close to the first shaft section, of the output gear is provided with an external spline matched with the spline in the sliding sleeve, and the distance between the output gear and the first shaft section is smaller than the axial length of the sliding sleeve.

Preferably, the power takeoff casing is provided with a cylinder mounting cavity, and the cylinder body is arranged in the cylinder mounting cavity.

Further, a sealing ring is arranged between the cylinder body and the power takeoff shell.

Preferably, the output shaft is mounted on the power take-off housing by means of a first bearing and a second bearing.

Preferably, a sealing ring is arranged between the cylinder block and the piston end of the piston fork shaft.

Preferably, the outer surface of the sliding sleeve is provided with a shifting fork groove, and a shifting fork head of the shifting fork is inserted into the shifting fork groove of the sliding sleeve.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses to control the casing and integrate in power takeoff casing itself, the piston fork axle is integrated in an organic whole with piston and declutch shift shaft simultaneously to for current structure, this structure part quantity significantly reduces, has reduced corresponding assembly process simultaneously, compact structure, installation are simple, low cost, can be in later power takeoff product design wide application.

Furthermore, a sealing ring is arranged between the cylinder body and the power takeoff shell, so that lubricating oil in the power takeoff is prevented from leaking out of the outer side of the cylinder body.

Drawings

Fig. 1 is a cross-sectional view of the power takeoff of the present invention.

In the figure: 1. the power takeoff device comprises a power takeoff shell, 2 a sliding sleeve, 3 a first bearing, 4 a second sealing ring, 5 a first sealing ring, 6 a piston fork shaft, 7 a cylinder body, 8 a shifting fork, 9 a return spring, 10 a second bearing and 11 an output shaft.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

As shown in fig. 1, utility model the power takeoff, including power takeoff casing 1, install output shaft 11 through first bearing 3 and second bearing 10 in the power takeoff casing 1, the part that output shaft 11 is located power takeoff casing 1 is including the first shaft section and the second shaft section that connect gradually, first shaft section diameter is greater than the second shaft section.

The outer surface of the first shaft section is provided with an external spline, and the first shaft section is connected with a sliding sleeve 2 with an internal spline through the external spline. An output gear (not shown in the figure) is installed on the second shaft section through a needle bearing, an external spline matched with the internal spline of the sliding sleeve 2 is arranged on the outer surface of one end, close to the first shaft section, of the output gear, and the distance between the output gear and the first shaft section is smaller than the axial length of the sliding sleeve 2. The outer surface of the sliding sleeve 2 is provided with a shifting fork groove along the circumferential direction.

The power takeoff casing 1 is provided with an air cylinder mounting cavity, an air cylinder body 7 is arranged in the air cylinder mounting cavity, and a first sealing ring 5 is arranged between the air cylinder body 7 and the power takeoff casing 1. A piston fork shaft 6 parallel to the output shaft 11 is arranged in the cylinder block 7, one end of the piston fork shaft 6 is positioned in the cylinder block 7, the other end of the piston fork shaft 6 extends out of the cylinder block 7, and the end part of the piston fork shaft is inserted into the power takeoff shell 1. One end of a piston fork shaft 6 extending out of the cylinder body 7 is sequentially sleeved with a shifting fork 8 and a return spring 9 from one end close to the cylinder body 7 to the other end, and a shifting fork head of the shifting fork 8 is inserted into a shifting fork groove on the outer surface of the sliding sleeve 2. A second sealing ring 4 is arranged between the cylinder block 7 and the piston fork shaft 6.

One end of the return spring 9 is limited by the shifting fork 8, and the other end is limited by the power takeoff shell 1. When the cylinder body 7 is inflated, the piston fork shaft 6 drives the shifting fork to move towards the direction close to the output gear.

The utility model discloses a power takeoff casing 1 has integrateed the function of manipulating the casing, and piston fork 6 has integrateed the function of piston and declutch shift shaft, and the airtight cavity that forms between 7 inner chambers of cylinder block and the piston fork 6 has been guaranteed to second sealing washer 4, and second sealing washer 5 has then prevented in the power takeoff that lubricating oil from oozing from the outside of cylinder block 7.

The utility model discloses the theory of operation does: when the air pressure of the whole vehicle enters the cylinder body 7, the piston fork shaft 6 is pushed to move axially to the right due to the existence of the closed cavity, so that the shifting fork 8 is pushed to move axially to the right, the shifting fork 8 shifts the sliding sleeve 2 to move rightwards, the sliding sleeve 2 is connected with the output shaft 11 and the output gear in a spline mode simultaneously, the power of the output gear is transmitted to the output shaft 11 through the sliding sleeve 2, the output shaft 11 outputs the power, namely, the power takeoff is engaged, and the return spring 9 is in a compression state at the moment. When the whole vehicle air source is closed, no external force exists in the cylinder body 7, the restoring force generated by the compressed return spring 9 can push the shifting fork 8 to move leftwards, the sliding sleeve 2 is separated from the output gear and returns to the initial state, and therefore gear picking of the power takeoff is achieved.

The utility model discloses a to control the casing and integrate in power takeoff casing itself, the piston fork axle is integrated in an organic whole with piston and declutch shift shaft simultaneously, promotes shift fork and sliding sleeve axial displacement equally, realizes the gear-taking and the gear-engaging of power takeoff. Compared with the existing structure, the structure has the advantages that the number of parts is greatly reduced, corresponding assembly procedures are reduced, the structure is compact, the installation is simple, the cost is low, and the structure can be widely applied to the design of power takeoff products in the future.

Claims

1. A power takeoff is characterized by comprising a power takeoff shell (1), wherein an output shaft (11) is installed in the power takeoff shell (1), and a sliding sleeve (2) is connected to the output shaft (11) through a spline;

a cylinder body (7) is arranged on the power takeoff shell (1), a piston fork shaft (6) parallel to the output shaft (11) is arranged in the cylinder body (7), one end of the piston fork shaft (6) serves as a piston end, the other end of the piston fork shaft (6) serves as a shifting fork shaft end, the piston end is located in the cylinder body (7), and the shifting fork shaft end extends out of the cylinder body (7) and is inserted into the power takeoff shell (1) at the end part;

a shifting fork (8) and a return spring (9) are sequentially sleeved at the end of the shifting fork shaft from one end close to the cylinder body (7) to the other end, and a shifting fork head of the shifting fork (8) is connected with the sliding sleeve (2); one end of the return spring (9) is limited by the shifting fork (8), and the other end is limited by the power takeoff shell (1).

2. The power take-off according to claim 1, characterized in that the part of the output shaft (11) located inside the power take-off housing (1) comprises a first shaft section and a second shaft section connected in series, the first shaft section being larger in diameter than the second shaft section;

sliding sleeve (2) splined connection is on first shaft segment, installs output gear on the second shaft segment, and output gear is close to the one end surface of first shaft segment and is provided with the external splines with sliding sleeve (2) internal spline complex, and the distance between output gear and the first shaft segment is less than the axial length of sliding sleeve (2).

3. Power take-off according to claim 1, characterized in that a cylinder mounting cavity is provided in the power take-off housing (1), in which cylinder block (7) is provided.

4. A power take-off according to claim 3, characterized in that a sealing ring is provided between the cylinder block (7) and the power take-off housing (1).

5. Power take-off according to claim 1, characterized in that the output shaft (11) is mounted on the power take-off housing (1) by means of a first bearing (3) and a second bearing (10).

6. The power take-off according to claim 1, characterised in that a sealing ring is arranged between the cylinder block (7) and the piston end of the piston fork shaft (6).

7. The power takeoff according to claim 1, characterized in that the outer surface of the sliding sleeve (2) is provided with a shift fork groove, and the shift fork head of the shift fork (8) is inserted into the shift fork groove of the sliding sleeve (2).