CN-122008731-A - Electric parallel bridge assembly with independent rainproof parking brake

CN122008731ACN 122008731 ACN122008731 ACN 122008731ACN-122008731-A

Abstract

The invention relates to an electric parallel bridge assembly with an independent rainproof parking brake, and belongs to the technical field of automobile manufacturing. The automobile parking brake system comprises a rim and tires arranged on the left side and the right side of a driving axle, a parallel shaft gearbox connected with the tires, a driving motor connected with a mounting flange of the parallel shaft gearbox, a differential mechanism for transmitting power of the driving motor to the parallel shaft gearbox and outputting the power to the driving axle through the differential mechanism, a parking brake assembly connected with an input shaft of the parallel shaft gearbox for parking brake of the tires, and brake drum assemblies arranged on the left side and the right side of the driving axle and connected with the rims and used for outputting the power of the driving motor to the rims and parking brake of the tires. The invention adopts independent service braking and centralized parking braking, provides greater parking braking capacity for the whole machine, cancels the parking braking mechanism on the brake drum assembly, simplifies the structure and enhances the reliability of service braking.

Inventors

CHEN GUOYOU
CHANG FANGPO
QIU JING
LIU ZHIXIN
Guo Kangzheng
LI GECAO

Assignees

安徽合力股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (9)

1. An electric parallel bridge assembly with independent rain-proof parking brakes, the electric parallel bridge assembly comprising: The driving axle is provided with rims and tires on the left side and the right side, and the rims are connected with the tires; The parallel shaft gearbox is connected with the drive axle; The driving motor is connected with the mounting flange of the parallel shaft gearbox, power of the driving motor is transmitted to the differential mechanism of the parallel shaft gearbox, and the power is output to the driving axle through the differential mechanism; The parking brake assembly is connected with an input shaft of the parallel shaft gearbox to perform parking brake on the tire; and the brake drum assemblies are arranged on the left side and the right side of the drive axle, are connected with the rims, and are used for outputting the power of the driving motor to the rims so as to perform parking braking on the tires.
2. The electric parallel axle assembly of claim 1, wherein the parallel shaft gearbox comprises: the I shaft assembly comprises a first gear, and the first gear is sleeved on the input shaft; The II shaft assembly comprises a second gear and a third gear, and the second gear is meshed with the first gear; And the III shaft assembly comprises a fourth gear and a fifth gear, and the fourth gear is meshed with the third gear.
3. The electric parallel axle assembly of claim 2, wherein the parallel axle gearbox further comprises an IV axle assembly coupled to the differential for outputting power from a drive motor to left and right axle shafts of the drive axle; The IV shaft assembly includes: A sixth gear meshed with the fifth gear; and the two half shaft gears are respectively meshed with the left half shaft and the right half shaft of the driving axle.
4. The electric parallel bridge assembly of claim 1, wherein the parking brake assembly comprises: One end of the inhaul cable is connected with the hand brake pull rod; the pull rod is characterized by comprising a pull rod, wherein one end of the pull rod is connected with the other end of the pull rope, the pull rod is pulled up to rotate along with the pin shaft, a transverse supporting rod is arranged at a pull rod notch of the pull rod, and the left end of the transverse supporting rod is pushed when the pull rod rotates; The first front brake shoe is hinged with the pull rod through a pin shaft, so that the upper end of the first front brake shoe is opened leftwards under the reverse pushing action of the pin shaft when the pin shaft rotates; The first rear brake shoe is arranged at the right end of the cross brace, so that when the left end of the cross brace is pushed by the pull rod, the upper end of the first rear brake shoe opens rightward and cooperates with the first front brake shoe to jointly squeeze the wheel drum, and a braking effect is achieved.
5. The electric parallel bridge assembly of claim 4, wherein the parking brake assembly comprises: the front return spring is connected with the first front brake shoe; And the rear return spring is connected with the first rear brake shoe, and the rear return spring and the front return spring respectively act to pull the first front brake shoe and the first rear brake shoe back to the original positions when the inhaul cable is released.
6. The electric parallel bridge assembly of claim 5, wherein the parking brake assembly comprises: the first gap adjuster is arranged between the first front brake shoe and the lower end of the first rear brake shoe to adjust the gaps among the first front brake shoe, the first rear brake shoe and the wheel drum.
7. The electric parallel bridge assembly of claim 1, wherein a rain shield is provided outside the parking brake assembly to prevent rain from entering and affecting braking performance.
8. The electric parallel bridge assembly of claim 1, wherein the brake drum assembly comprises: the second front brake shoe is arranged on one side of the mounting plate; The second rear brake shoe is arranged on the other side of the mounting plate; The brake cylinder is arranged on the mounting plate and between the upper ends of the second front brake shoe and the second rear brake shoe, and after brake oil enters the brake cylinder to push out the ball heads at the two ends of the brake cylinder, the second front brake shoe and the second rear brake shoe are opened to two sides and are pressed to the brake drum, so that friction force is generated to reduce the speed.
9. The electric parallel bridge assembly of claim 8, wherein the brake drum assembly comprises: The second gap adjuster is arranged between the lower ends of the second front brake shoe and the second rear brake shoe to adjust the gaps among the second front brake shoe, the second rear brake shoe and the brake drum; And the spring self-adjusting mechanism is connected with the second gap adjuster and is matched with the second gap adjuster to adjust gaps among the second front brake shoe, the second rear brake shoe and the brake drum.

Description

Electric parallel bridge assembly with independent rainproof parking brake Technical Field The invention relates to the technical field of automobile manufacturing, in particular to an electric parallel bridge assembly with an independent rainproof parking brake. Background The traditional 4.5 ton electric parallel bridge assembly adopts service braking and parking braking to be integrated, is arranged on the brake drum at the tail end, is directly connected with a rim and a tire, and needs very large braking torque, because the service braking and the parking braking adopt the same set of executing structure, the structure of a lever mechanism of the parking braking is very complex, the lever ratio of a control handle is very limited, the control force of the hand braking can often exceed the standard requirement, or the hand braking cannot be stopped on a ramp, the brake needs to be worn in for many times, and if the situation that the braking force of a left brake and a right brake is seriously uneven, the gap of the parking brake needs to be repeatedly adjusted, so that full-load ramp parking can be realized. Disclosure of Invention The invention aims to provide an electric parallel bridge assembly with an independent rain-proof parking brake. The electric parallel bridge assembly adopts independent service brakes and centrally arranged parking brakes, the parking brake assembly is arranged at the input end of the gearbox, the required braking torque is minimum through the amplification effect of the gearbox and the engagement effect of a gear of the gearbox, the braking is most reliable, the parking brake assembly is provided with parking brake capability with larger requirements, the parking brake assembly is also provided with a rain cover, the influence of rainwater on the braking performance of the parking brake assembly during raining is reduced, the parking brake mechanism on the brake drum assembly is cancelled, the structure is simplified, and the reliability of service brakes is enhanced. In order to achieve the above object, the present invention provides an electric parallel bridge assembly with an independent rain-proof parking brake, the electric parallel bridge assembly comprising: The driving axle is provided with rims and tires on the left side and the right side, and the rims are connected with the tires; The parallel shaft gearbox is connected with the drive axle; The driving motor is connected with the mounting flange of the parallel shaft gearbox, power of the driving motor is transmitted to the differential mechanism of the parallel shaft gearbox, and the power is output to the driving axle through the differential mechanism; The parking brake assembly is connected with an input shaft of the parallel shaft gearbox to perform parking brake on the tire; and the brake drum assemblies are arranged on the left side and the right side of the drive axle, are connected with the rims, and are used for outputting the power of the driving motor to the rims so as to perform parking braking on the tires. Optionally, the parallel shaft gearbox comprises: the I shaft assembly comprises a first gear, and the first gear is sleeved on the input shaft; The II shaft assembly comprises a second gear and a third gear, and the second gear is meshed with the first gear; And the III shaft assembly comprises a fourth gear and a fifth gear, and the fourth gear is meshed with the third gear. Optionally, the parallel shaft gearbox further comprises an IV shaft assembly connected with the differential mechanism and used for outputting the power of the driving motor to a left half shaft and a right half shaft of the driving axle; The IV shaft assembly includes: A sixth gear meshed with the fifth gear; and the two half shaft gears are respectively meshed with the left half shaft and the right half shaft of the driving axle. Optionally, the parking brake assembly includes: One end of the inhaul cable is connected with the hand brake pull rod; the pull rod is characterized by comprising a pull rod, wherein one end of the pull rod is connected with the other end of the pull rope, the pull rod is pulled up to rotate along with the pin shaft, a transverse supporting rod is arranged at a pull rod notch of the pull rod, and the left end of the transverse supporting rod is pushed when the pull rod rotates; The first front brake shoe is hinged with the pull rod through a pin shaft, so that the upper end of the first front brake shoe is opened leftwards under the reverse pushing action of the pin shaft when the pin shaft rotates; The first rear brake shoe is arranged at the right end of the cross brace, so that when the left end of the cross brace is pushed by the pull rod, the upper end of the first rear brake shoe opens rightward and cooperates with the first front brake shoe to jointly squeeze the wheel drum, and a braking effect is achieved. Optionally, the parking brake assembly includes: the front return spring is co