CN202742989U

CN202742989U - Driving axle with parking brake

Info

Publication number: CN202742989U
Application number: CN 201220383899
Authority: CN
Inventors: 郑建辉; 余春晓; 袁罕; 王新郧
Original assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute
Current assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute
Priority date: 2012-08-03
Filing date: 2012-08-03
Publication date: 2013-02-20
Anticipated expiration: 2022-08-03

Abstract

The utility model discloses a driving axle with a parking brake. The parking brake is directly connected with an input shaft of the driving axle. The parking brake applied to the driving axle solves a problem that middle braking cannot meet requirements of single axle steering driving or an electric driving automobile. A breakaway type driving axle and the parking brake are integrally designed, size of the parking brake is reduced, and work loads of the parking brake are reduced.

Description

Drive axle with Parking Brake

Technical field

The utility model relates to electrobus actuation techniques field, particularly a kind of drive axle with Parking Brake.

Background technology

Existing braking during standstill has two kinds of patterns: a kind of is the car side brake that shares with service braking system, is used for rigid drive axle or broken drive bridge wheel nave and brake assembly; A kind of is centre brake, and it is ad hoc holding brake device in driving system, generally is installed in the input shaft end of transmission output shaft end or drive axle, and the lock torque of its generation acts on the transmission shaft.Front a kind of pattern, running brake and Parking Brake are structure as a whole, and take up room large, are not suitable for steering drive axle; Then a kind of holding brake device of pattern then is mainly used in traditional Multi Axle Drive Vehicle, is not suitable for single bridge and drives or electric drive automobile.

The utility model content

Technical problem to be solved in the utility model provides the drive axle with Parking Brake, and this drive axle is mainly used in the actuation techniques field of electrobus, has solved existing braking during standstill technology and can not satisfy the problem that single bridge turns to driving or electric drive automobile.

For solving the problems of the technologies described above, the utility model provides the drive axle device with Parking Brake, comprises Parking Brake and drive axle; Described Parking Brake directly is connected with the input shaft of drive axle.

Further, this drive axle also includes the dish spring, and described dish spring is installed between the outside friction disc of described Parking Brake.

The drive axle with Parking Brake that the utility model provides has solved centre brake and can't satisfy the problem that single bridge turns to driving or electric drive automobile; Broken drive bridge and Parking Brake Integrated design have reduced the volume of Parking Brake, have reduced the workload of Parking Brake.

Description of drawings

The structural representation with the drive axle of Parking Brake that Fig. 1 provides for the utility model embodiment;

The structural representation with the Parking Brake of the drive axle of Parking Brake that Fig. 2 provides for the utility model embodiment;

Reference numeral:

The 1-brake seat; The 2-oil sealing; 3,6-outside friction disc; 4-dish spring; The 5-inner attrition piece; The 7-briquetting; 8,11-O RunddichtringO; The 9-piston; The 10-brake casing; The 12-bolt; The 13-spring perch; The 14-spring; 15,20-jam nut; The 16-adjusting screw(rod); The 17-end cap; The 18-setting nut; The 19-packing ring; The 21-Parking Brake; The 22-input shaft; 23-drive axle casing; The 24-drive motor; The 25-output shaft; The 26-inter-wheel differential.

The specific embodiment

Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, now in conjunction with the accompanying drawings and embodiments, the utility model is described further.

The drive axle with Parking Brake that the utility model embodiment provides as shown in Figure 1, comprises Parking Brake 21 and drive axle.This Parking Brake 21 directly is connected with the input shaft 22 of drive axle; As shown in Figure 2, this Parking Brake 21 comprises brake seat 1, inner attrition piece 5,

outside friction disc

3,6 and brake casing 10.Wherein, Parking Brake 21 is connected with drive axle casing 23 by brake seat 1, outside friction disc is connected with brake seat 1, inner attrition piece 5 is connected with the input shaft 22 of drive axle, brake casing 10 links to each other with brake seat 1 by bolt, and briquetting 7, piston 9, O RunddichtringO 8,11, spring perch 13 and spring 14 are installed in the brake casing 10.Briquetting 7 links to each other by bolt 12 with piston 9, and two O RunddichtringOs 8,11 are installed in the annular groove at piston 9 two ends, and end cap 17 and brake casing 10 link to each other by bolt.Spring 14 is arranged between spring perch 13 and the end cap 17, makes spring perch 13 head on piston 9; This Parking Brake 21 adopts dry type friction disc brake pattern, and the oil sealing 2 that is arranged in the brake seat 1 can prevent that the gear lubricant in the drive axle casing 23 from entering in the Parking Brake 21, realizes dry type braking; This drive axle also comprises manual brake off device, and it comprises setting nut 18 and adjusting screw(rod) 16, and wherein adjusting screw(rod) 16 is connected with the spring perch 13 that is positioned at braking housing 10, and the hole of pass through braking the end cap 17 of housing 10 is connected with setting nut 18; When the manual brake off of needs, screw setting nut 18, move to the direction of end cap 17 with flexible spring seat 13 by adjusting screw(rod) 16, thereby the tensile force of releasing spring 14 makes interior outside friction disc separate to realize the purpose of brake off.

The assembly of this drive axle as shown in Figure 1, mainly comprises Parking Brake 21, input shaft 22, drive axle casing 23, drive motor 24, output shaft 25, inter-wheel differential 26, internal gear and tween drive shaft etc.; This drive axle is breakaway-element central authorities deceleration patterns, and the pressure-bearing type structure can satisfy the requirement of electrobus low floor, low center of gravity, makes Vehicle Driving Cycle more steady; Simultaneously the utility model is with the design that becomes one of Parking Brake 21 and drive axle, Parking Brake 21 is arranged on the input end of drive axle, directly link to each other with input shaft 22, both reduced the volume of Parking Brake 21, reduced again the workload of Parking Brake 21; Drive axle provides power by drive motor 24, can realize stepless shift function, and drive axle is by inter-wheel differential 26, with transmission of power to output shaft 25, thereby drive Vehicle Driving Cycle, be well positioned to meet turning and the crossing ability of electrobus.

Wherein, this drive axle also includes dish spring 4, and it is installed between the

outside friction disc

3,6; The tensile force of dish spring 4 can make interior outside friction disc when separating, and separation more thorough produces friction between the outside friction disc in avoiding under the high rotating speed and cause the too high problem of drg temperature rise.

The principle of work with the drive axle of Parking Brake that following the utility model provides:

During Parking Brake 21 work, spring 14 produces enough large tensile force, promote spring perch 13, piston 9 and briquetting 7 to the direction motion of brake seat 1, inner attrition piece 5 and

outside friction disc

3,6 are compressed, produce enough large static friction force between the interior outside friction disc avoiding input shaft 22 to rotate, thus the realization braking during standstill; When the needs brake off, the braking liquid of certain pressure injects in system by oil inlet, braking liquid pushing piston 9 and briquetting 7 are to the direction motion of end cap 17, thereby being separated, interior outside friction disc realizes brake off, the tensile force of dish spring 4 can make the more thorough of friction lining separation at this moment, avoids producing friction between the interior outside friction disc under the high rotating speed and causes the too high problem of drg temperature rise.

The drive axle with Parking Brake that the utility model provides by Integrated design, provides a kind of assembly structure of the electric drive bridge with braking during standstill, has solved traditional braking during standstill technology and can't apply to single bridge and turn to and drive or the problem of electric drive automobile.

The utility model compared with prior art has the following advantages and good effect:

(1) solve braking during standstill and running brake and shared the service brake inefficacy that brings, thus the problem that causes braking during standstill to lose efficacy;

(2) solve center brake and can't satisfy the problem that single bridge turns to driving or electric drive automobile;

(3) solved under the high rotating speed, the Wet-type friction slice brake bush separates and does not thoroughly cause the too high problem of drg temperature rise;

(4) broken drive bridge and Parking Brake Integrated design have reduced the volume of Parking Brake, have reduced the workload of Parking Brake.

It should be noted last that, the above specific embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to example the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. with the drive axle of Parking Brake, it is characterized in that, Parking Brake directly is connected with the input shaft of drive axle.

2. the drive axle with Parking Brake as claimed in claim 1 is characterized in that, also includes the dish spring, and described dish spring is installed between the outside friction disc of described Parking Brake.