CN214197211U

CN214197211U - First-stage gear transmission friction plate power takeoff

Info

Publication number: CN214197211U
Application number: CN202022739469.0U
Authority: CN
Inventors: 吕超; 问晋芳; 冀勇彪
Original assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Current assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-09-14
Anticipated expiration: 2030-11-24

Abstract

The utility model belongs to the technical field of power takeoff, in particular to a primary gear transmission friction plate power takeoff, which solves the problem that a clutch plate of a traditional power takeoff is easy to burn and has a fault in the use process under the working condition of environmental sanitation vehicle type operation; and in severe cases, the problems of the transmission and the power takeoff can be damaged. The utility model comprises a front end cover, a hollow output shaft, an input gear, an output gear, a friction plate group, a piston, a return spring, a ring type cylinder and a shell; an output gear on the hollow output shaft is meshed with an input gear, a friction plate group is arranged between the output gear and the hollow output shaft, a ring type cylinder is fixed on the hollow output shaft, the front end of a piston is positioned at the rear end of the friction plate group, and the front end of the piston is fixedly connected with the rear end of a return spring; the first cavity, the connecting cavity and the second cavity of the ring type cylinder are sequentially communicated from head to tail. The utility model discloses improve the life of gearbox and power takeoff when guaranteeing high-efficient, the safe operation of vehicle under sanitation vehicle driving special operating mode.

Description

First-stage gear transmission friction plate power takeoff

Technical Field

The utility model belongs to the technical field of the power takeoff, concretely relates to one-level gear drive friction disc power takeoff.

Background

At present, the environmental sanitation vehicle type operation is a special working condition, for example, the target vehicle speed of a vehicle is generally required to be 15-20 km/h when a sprinkler is used for sprinkling, and the vehicle speed of a highway with good road conditions needs to reach about 40 km/h. If the vehicle runs in the first gear or the second gear, the speed of the vehicle is below 10km/h, and the use requirement is not met. Because of the working condition limitation, the vehicle can be started only in three or more gears, but because the sliding friction work of the vehicle clutch is insufficient (the traditional power takeoff adopts a meshing sleeve structure to transmit power), the clutch plate is easy to burn and break down; meanwhile, when the whole factory effectively protects the service life of the transmission and the power takeoff and requires the vehicle to run, the power takeoff is not allowed to be put into gear midway, but in the actual condition, when the vehicle runs, a driver often has the illegal operation of manually and forcibly shifting gears, so that huge impact is generated inside the transmission and the power takeoff, and the transmission and the power takeoff are damaged in serious conditions.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the clutch disc of the traditional power takeoff is easy to burn and break down in the use process under the working condition of the sanitation vehicle type; the problem of damaging a speed changer and a power takeoff can be solved when the problem is serious, and a primary gear transmission friction plate power takeoff is provided.

The utility model discloses a following technical scheme realizes: the primary gear transmission friction plate power takeoff comprises a front end cover, a hollow output shaft, an input gear, an output gear, a friction plate group, a piston, a return spring, an annular cylinder and a shell;

the front end cover is fixed on the shell, the front end cover is positioned at the front end of the hollow output shaft, two ends of the hollow output shaft are fixed on the shell through tapered bearings, an output gear is installed at a position, close to the front end, of the hollow output shaft, the output gear is meshed with an input gear, the input gear is fixed on the shell, a friction plate set is arranged between the output gear and the hollow output shaft and comprises static friction plates and dynamic friction plates, the static friction plates and the dynamic friction plates are arranged in a staggered mode, the static friction plates are connected with the hollow output shaft through internal splines, the dynamic friction plates are connected with the output gear through external splines, an annular cylinder is fixed at a position, close to the rear end, of the hollow output shaft, a second cavity and a piston are arranged in the annular cylinder, the front end of the piston is positioned at the rear end of the friction plate set, the front end of; the front end cover is provided with a first cavity, and the first cavity is connected with a whole vehicle air source; a cavity is arranged in the hollow output shaft along the axial direction of the hollow output shaft, a connecting cavity is arranged at the position, located at the tail end of the cavity, of the hollow output shaft along the radial direction of the hollow output shaft, and the first cavity, the connecting cavity and the second cavity of the ring cylinder are sequentially communicated end to end.

Furthermore, sealing rings for sealing are arranged between the ring type cylinder and the piston, between the piston and the hollow output shaft and between the piston and the hollow output shaft.

Further, the output gear is mounted on the hollow output shaft through a needle bearing.

Further, the input gear is fixed on the shell through two conical bearings.

The utility model discloses compare prior art's beneficial effect:

the friction plate power takeoff of the application carries out power transmission in a friction mode of the friction plate, the power takeoff is soft combined when in gear engagement, the power takeoff takes power from a middle shaft of a transmission, direct gear-up and gear-off with load can be realized through the pneumatic control power takeoff, a clutch of a vehicle does not need to be stepped on, and meanwhile, after the vehicle can drive to more than three gears to reach the required use vehicle speed, the power takeoff is used under the special condition of gear-up operation, so that the problem that the vehicle is burnt due to insufficient sliding friction work of a clutch plate is thoroughly solved, and a chassis power chain can be combined or disconnected at any time to meet the special working condition operation requirement of driving of an environmental sanitation vehicle; because the friction plates are flexibly combined, impact abnormal sound can not occur when the gear is engaged, and the service lives of the speed changer and the power takeoff are greatly prolonged; therefore, the service life of the gearbox and the power takeoff is prolonged while the efficient and safe running of the vehicle is guaranteed.

Drawings

Fig. 1 is a three-dimensional schematic view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

in the figure: 1-front end cover, 1.1-first chamber

2-hollow output shaft, 2.1-cavity, 2.2-connecting cavity

3-input gear

4-output gear

5-Friction plate group

6-piston

7-return spring

8-ring cylinder, 8.1-second chamber

9-shell.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

As used herein, "front to back" refers to the circumference of the hollow output shaft with the front end cap at the front end and the ring chamber cylinder at the rear end.

Referring to fig. 1 to 2, the utility model provides a technical scheme: the primary gear transmission friction plate power takeoff comprises a front end cover 1, a hollow output shaft 2, an input gear 3, an output gear 4, a friction plate group 5, a piston 6, a return spring 7, an annular cylinder 8 and a shell 9;

the front end cover 1 is fixed on a shell 9, the front end cover 1 is positioned at the front end of a hollow output shaft 2, two ends of the hollow output shaft 2 are fixed on the shell 9 through tapered bearings, an output gear 4 is installed on the hollow output shaft 2 near the front end, the output gear 4 is in gear engagement with an input gear 3, the input gear 3 is fixed on the shell 9, a friction plate set 5 is arranged between the output gear 4 and the hollow output shaft 2, the friction plate set 5 comprises static friction plates and dynamic friction plates, the static friction plates and the dynamic friction plates are arranged in a staggered mode, the static friction plates are connected with the hollow output shaft 2 through internal splines, the dynamic friction plates are connected with the output gear 4 through external splines, a ring-shaped cylinder 8 is fixed on the hollow output shaft 2 near the rear end, a second cavity 8.1 and a piston 6 are arranged in the ring-shaped cylinder 8, the front end of the piston 6 is positioned at the rear end of the friction plate set 5, and the front end of the piston 6 is fixedly connected with the rear end of a return spring 7, the front end of the return spring 7 is fixed on the hollow output shaft 2; the front end cover 1 is provided with a first cavity 1.1, and the first cavity 1.1 is connected with a whole vehicle air source; the hollow output shaft 2 is internally provided with a cavity 2.1 along the axial direction thereof, the hollow output shaft 2 is provided with a connecting cavity 2.2 along the radial direction thereof at the position at the tail end of the cavity, and the first cavity 1.1, the cavity 2.1, the connecting cavity 2.2 and the second cavity 8.1 of the ring cylinder 8 are sequentially communicated end to end.

The power takeoff can simultaneously meet the requirements of left and right matching.

And sealing rings for sealing are arranged between the ring type cylinder 8 and the piston 6, between the piston 6 and the hollow output shaft 2 and between the piston 6 and the hollow output shaft 2.

The output gear 4 is mounted on the hollow output shaft 2 through a needle bearing.

The input gear 3 is fixed to the housing 9 by means of two conical bearings.

The utility model discloses a theory of operation:

gear engaging operation: the whole vehicle air source larger than 0.7Mpa is input through the air hole of the front end cover 1, then enters the cavity 8.1 of the annular chamber cylinder 8 through the first cavity 1.1 of the front end cover 1, the cavity 2.1 of the hollow output shaft 2 and the connecting cavity 2.2, the air entering the annular chamber cylinder 8 pushes the piston 6 to move forwards (simultaneously, the return spring 7 is compressed), and further the friction plate group 5 is pressed, and the friction force generated by the pressing of the end faces of the static and dynamic friction plates of the friction plate group 5 is transmitted to the output shaft 2, so that the power output of the power takeoff is realized;

gear-off operation: after the air source of the whole vehicle is disconnected, the piston 6 moves towards the rear end under the action of the restoring force of the return spring 7, so that the return is carried out, the friction plate group 5 stops compressing, the power is interrupted, and the gear is disengaged.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a one-level gear drive friction disc power takeoff which characterized in that: the device comprises a front end cover (1), a hollow output shaft (2), an input gear (3), an output gear (4), a friction plate group (5), a piston (6), a return spring (7), an annular cylinder (8) and a shell (9);

the front end cover (1) is fixed on a shell (9), the front end cover (1) is positioned at the front end of a hollow output shaft (2), two ends of the hollow output shaft (2) are fixed on the shell (9) through conical bearings, an output gear (4) is installed on the hollow output shaft (2) close to the front end, the output gear (4) is in gear engagement with an input gear (3), the input gear (3) is fixed on the shell (9) through two conical bearings, a friction plate group (5) is arranged between the output gear (4) and the hollow output shaft (2), the friction plate group (5) comprises static friction plates and dynamic friction plates which are arranged in a staggered mode, the static friction plates are connected with the hollow output shaft (2) through internal splines, the dynamic friction plates are connected with the output gear (4) through external splines, and an annular cylinder (8) is fixed on the hollow output shaft (2) close to the rear end, a second cavity (8.1) and a piston (6) are arranged in the ring-type cylinder (8), the front end of the piston (6) is positioned at the rear end of the friction plate group (5), the front end of the piston (6) is fixedly connected with the rear end of a return spring (7), and the front end of the return spring (7) is fixed on the hollow output shaft (2); the front end cover (1) is provided with a first cavity (1.1), and the first cavity (1.1) is connected with a whole vehicle air source; the hollow output shaft (2) is internally provided with a cavity (2.1) along the axial direction thereof, the position of the hollow output shaft (2) at the tail end of the cavity is provided with a connecting cavity (2.2) along the radial direction thereof, and the first cavity (1.1), the cavity (2.1), the connecting cavity (2.2) and the second cavity (8.1) of the ring cylinder (8) are sequentially communicated end to end.

2. A primary gear friction plate power take off as claimed in claim 1 wherein: and sealing rings for sealing are arranged between the ring type cylinder (8) and the piston (6), between the piston (6) and the hollow output shaft (2) and between the piston (6) and the hollow output shaft (2).

3. A primary gear friction plate power take off as claimed in claim 1 wherein: the output gear (4) is mounted on the hollow output shaft (2) through a needle bearing.