Four-wheel electronic parking brake device for new energy automobile

Abstract

The utility model relates to the technical field of automobile parking brake devices, in particular to a four-wheel electronic parking brake device for a new energy automobile, which comprises a brake bottom plate, a guide plate is fixedly connected to the front side of the brake bottom plate, a synchronous gear is rotatably connected to the front side of the guide plate, and a brake shaft is rotatably connected to the top end of the guide plate. The front end of the brake shaft is meshed with a synchronous gear through a transmission gear, a plurality of telescopic rods are slidably connected into the guide plate, the ends, close to each other, of the telescopic rods are slidably connected with the synchronous gear through sliding columns, and the ends, away from each other, of the telescopic rods are fixedly connected with brake shoes. Compared with an existing four-wheel electronic parking braking device for the new energy automobile, the four-wheel electronic parking braking device for the new energy automobile has the advantages that sufficient friction force can be guaranteed for braking through the design, braking force is improved, and meanwhile abrasion uniformity can be guaranteed through sufficient contact.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parking brake devices, and in particular to a four-wheel electronic parking brake device for new energy vehicles. Background Art

[0002] The parking brake device, also known as the parking brake, usually refers to the manual brake installed on motor vehicles, referred to as the handbrake. It is used to stabilize the vehicle after the vehicle stops to avoid accidents caused by the vehicle rolling when parking on a slope. Common handbrakes are generally placed in the drooping position of the driver's right hand for easy use. Some automatic transmission models on the market are designed with a foot brake with the same function as the handbrake on the outside of the driver's left foot. Some advanced models are also equipped with an electronic parking brake system.

[0003] At present, most of the four-wheel electronic parking brake devices used in new energy vehicles are electronic parking brake devices, but they all use the friction between the friction plate and the brake drum as the source of braking force, among which the brake drum (for details, please refer to Figure 4 ) When in use, the brake shaft is used to rotate and spread the two sets of brake shoes, so that the friction linings on the outside of the brake shoes rub against the inner wall of the brake drum to brake, and the bottom ends of the two sets of brake shoes are rotatably connected to the brake base plate, so that after the brakes are released, the top ends of the two sets of brake shoes can be reset by springs. However, in actual use, after the brake shoes are spread apart, since the bottom ends of the two sets of brake shoes are rotatably connected to the brake base plate, the two sets of brake shoes are in an obliquely supported state, making it impossible for the outer sides of the friction linings to completely contact the inner wall of the brake drum, resulting in greatly reduced friction and limited braking force. At the same time, due to incomplete contact, the friction linings will wear unevenly after long-term use.

[0004] Therefore, it is particularly important to design a four-wheel electronic parking brake device for new energy vehicles to solve the above-mentioned defects. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model designs a four-wheel electronic parking brake device for new energy vehicles. The parking brake device aims to solve the technical problem that the outer side of the friction lining cannot completely contact the inner wall of the brake drum in the prior art, resulting in greatly reduced friction and limited braking force. At the same time, due to incomplete contact, the friction lining will suffer from uneven wear after long-term use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A four-wheel electronic parking brake device for new energy vehicles comprises a brake base plate, a guide plate is fixedly connected to the front of the brake base plate, a synchronous gear is rotatably connected to the front of the guide plate, a brake shaft is rotatably connected to the top of the guide plate, a front end of the brake shaft is meshed with the synchronous gear through a transmission gear, a plurality of groups of telescopic rods are slidably connected inside the guide plate, the ends of the plurality of groups of telescopic rods that are close to each other are slidably connected to the synchronous gear through a sliding column, a brake shoe is fixedly connected to the ends of the plurality of groups of telescopic rods that are far away from each other, and a friction lining is fixedly installed on the outer side of the plurality of groups of brake shoes.

[0008] As a preferred solution of the utility model, a plurality of groups of mounting holes are provided at equal intervals on the outer edge of the brake base plate, and the brake shaft is rotatably connected to the brake base plate.

[0009] As a preferred solution of the utility model, a sliding groove adapted to be used with the telescopic rod is provided inside the guide plate, and a moving groove adapted to be used with the sliding column is provided on the front side of the guide plate.

[0010] As a preferred solution of the utility model, the synchronous gear is rotatably connected to the guide plate through a connecting sleeve, and multiple groups of guide grooves adapted for use with sliding columns are provided inside the synchronous gear, and the multiple groups of guide grooves are evenly spaced and distributed on the front side of the synchronous gear.

[0011] As a preferred solution of the utility model, multiple groups of telescopic rods are located inside the guide plate and are evenly spaced, and the multiple groups of telescopic rods are fixedly connected to the brake shoe via a reinforcing block.

[0012] As a preferred solution of the utility model, the sliding column is slidably connected to the guide groove, and the front end of the sliding column and the outer side of the guide groove are threadedly connected to a limiting cap.

[0013] As a preferred solution of the utility model, the outer sides of the multiple groups of brake shoes are provided with mounting grooves, and the friction linings are fixedly mounted on the inner sides of the mounting grooves by multiple groups of screws.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is designed that when braking is performed, the brake shaft is driven to rotate, and the synchronous gear is driven to rotate under the transmission of the transmission gear. When the synchronous gear rotates, it drives the multiple groups of sliding posts to slide on the inner side of the guide groove under the guidance of the multiple groups of guide grooves. At the same time, it drives the sliding posts to slide on the inner side of the movable groove under the guidance of the guide groove, thereby driving the telescopic rod to slide outward on the inner side of the slide groove. After the multiple groups of telescopic rods slide outward from the inner side of the slide groove synchronously, the friction linings on the outside are also in contact with the inner side wall of the brake drum at equal intervals, so that the multiple groups of friction linings are fully in contact with the inner side wall of the brake drum for friction braking, which can not only ensure sufficient friction force for braking and improve the braking force, but also the sufficient contact can also ensure the uniformity of wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the installation slot structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the guide plate structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the brake drum structure under the prior art.

[0020] In the figure: 1. brake base plate; 101. mounting hole; 2. guide plate; 201. slide groove; 202. moving groove; 3. synchronous gear; 301. connecting sleeve; 302. guide groove; 4. brake shaft; 5. transmission gear; 6. telescopic rod; 601. reinforcement block; 7. slide column; 701. limit cap; 8. brake shoe; 801. mounting groove; 9. friction lining. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Example

[0022] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0023] A four-wheel electronic parking brake device for new energy vehicles includes a brake base plate 1, a guide plate 2 is fixedly connected to the front of the brake base plate 1, a synchronous gear 3 is rotatably connected to the front of the guide plate 2, a brake shaft 4 is rotatably connected to the top of the guide plate 2, a front end of the brake shaft 4 is meshed with the synchronous gear 3 through a transmission gear 5, a plurality of telescopic rods 6 are slidably connected to the inside of the guide plate 2, the ends of the plurality of telescopic rods 6 that are close to each other are slidably connected to the synchronous gear 3 through a sliding column 7, a brake shoe 8 is fixedly connected to the ends of the plurality of telescopic rods 6 that are far away from each other, and a friction lining 9 is fixedly installed on the outer sides of the plurality of brake shoes 8.

[0024] First, a plurality of mounting holes 101 are formed at equal intervals on the outer edge of the brake base plate 1 , the brake shaft 4 is rotatably connected to the brake base plate 1 , and the brake base plate 1 is used to mount the brake drum through the plurality of mounting holes 101 on the outer edge.

[0025] Furthermore, a slide groove 201 adapted for use with the telescopic rod 6 is provided inside the guide plate 2, and a movable groove 202 adapted for use with the slide column 7 is provided on the front side of the guide plate 2. When braking, the slide column 7 slides on the inner side of the movable groove 202, driving the telescopic rod 6 to slide outward on the inner side of the slide groove 201, so that the friction lining 9 on the outer side of the brake shoe 8 contacts the inner wall of the brake drum for friction braking.

[0026] Then, the synchronous gear 3 is rotatably connected with the guide plate 2 through the connecting sleeve 301. The interior of the synchronous gear 3 is provided with multiple groups of guide grooves 302 adapted for use with the sliding column 7, and the multiple groups of guide grooves 302 are evenly spaced and distributed on the front side of the synchronous gear 3. The sliding column 7 is slidably connected with the guide groove 302. The front end of the sliding column 7 is threadedly connected with the limiting cap 701 on the outer side of the guide groove 302. When braking, the brake shaft 4 is driven to rotate, and the synchronous gear 3 is driven to rotate under the transmission of the transmission gear 5. When the synchronous gear 3 rotates, the multiple groups of sliding columns 7 are driven to slide on the inner side of the guide groove 302 under the guidance of the multiple groups of guide grooves 302. At the same time, the sliding column 7 is driven to slide on the inner side of the movable groove 202 under the guidance of the guide groove 302, thereby driving the telescopic rod 6 to slide outward on the inner side of the slide groove 201, and the limiting cap 701 is used to limit the front side of the synchronous gear 3, and it can also be disassembled after being screwed down.

[0027] Secondly, multiple groups of telescopic rods 6 are evenly spaced inside the guide plate 2, and are fixedly connected to the brake shoe 8 via the reinforcing block 601. The reinforcing block 601 increases the connection area between the telescopic rod 6 and the brake shoe 8, thereby ensuring the connection strength. After the multiple groups of telescopic rods 6 simultaneously slide outward from the inner side of the slide groove 201, the outer friction lining 9 also contacts the inner wall of the brake drum at equal intervals, so that the multiple groups of friction linings 9 fully contact the inner wall of the brake drum, thereby ensuring sufficient friction for braking, thereby improving the braking force, and sufficient contact can also ensure uniformity of wear.

[0028] Finally, the outer sides of the multiple groups of brake shoes 8 are provided with mounting grooves 801, and the friction linings 9 are fixedly installed on the inner sides of the mounting grooves 801 by multiple groups of screws, so as to facilitate their installation, positioning and replacement.

[0029] In this embodiment, the implementation scenario is specifically as follows: when braking, the brake shaft 4 is driven to rotate, and the synchronous gear 3 is driven to rotate under the transmission of the transmission gear 5. When the synchronous gear 3 rotates, it drives the multiple groups of slide posts 7 to slide on the inner side of the guide groove 302 under the guidance of the multiple groups of guide grooves 302. At the same time, under the guidance of the guide groove 302, the slide post 7 is driven to slide on the inner side of the movable groove 202, thereby driving the telescopic rod 6 to slide outward on the inner side of the slide groove 201. After the multiple groups of telescopic rods 6 slide outward from the inner side of the slide groove 201 synchronously, the outer friction lining 9 also contacts the inner side wall of the brake drum at equal intervals, so that the multiple groups of friction linings 9 fully contact the inner side wall of the brake drum for friction braking. The entire operation process is simple and convenient. Compared with the existing four-wheel electronic parking brake device for new energy vehicles, the utility model can ensure sufficient friction force for braking through design, thereby improving the braking force. At the same time, sufficient contact can also ensure uniform wear.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-wheel electronic parking brake device for a new energy vehicle, comprising a brake base plate (1), characterized in that: The front side of the brake base plate (1) is fixedly connected to a guide plate (2), the front side of the guide plate (2) is rotatably connected to a synchronous gear (3), the top end of the guide plate (2) is rotatably connected to a brake shaft (4), the front end of the brake shaft (4) is meshed with the synchronous gear (3) via a transmission gear (5), the interior of the guide plate (2) is slidably connected to a plurality of telescopic rods (6), the ends of the plurality of telescopic rods (6) that are close to each other are slidably connected to the synchronous gear (3) via a sliding column (7), the ends of the plurality of telescopic rods (6) that are far away from each other are fixedly connected to a brake shoe (8), and the outer sides of the plurality of brake shoes (8) are fixedly mounted with a friction lining (9).

2. A four-wheel electronic parking brake device for a new energy vehicle according to claim 1, characterized in that: The outer edge of the brake base plate (1) is provided with a plurality of groups of mounting holes (101) at equal intervals, and the brake shaft (4) is rotatably connected to the brake base plate (1).

3. The four-wheel electronic parking brake device for new energy vehicles according to claim 1, characterized in that: A sliding groove (201) adapted for use with the telescopic rod (6) is provided inside the guide plate (2), and a moving groove (202) adapted for use with the sliding column (7) is provided on the front surface of the guide plate (2).

4. The four-wheel electronic parking brake device for new energy vehicles according to claim 1 is characterized in that: The synchronous gear (3) is rotatably connected to the guide plate (2) via a connecting sleeve (301); a plurality of guide grooves (302) adapted for use with the slide column (7) are provided inside the synchronous gear (3); and the plurality of guide grooves (302) are arranged at equal intervals on the front side of the synchronous gear (3).

5. The four-wheel electronic parking brake device for new energy vehicles according to claim 1, characterized in that: The plurality of groups of telescopic rods (6) are located inside the guide plate (2) and are distributed at equal intervals. The plurality of groups of telescopic rods (6) are fixedly connected to the brake shoe (8) via a reinforcing block (601).

6. A four-wheel electronic parking brake device for a new energy vehicle according to claim 4, characterized in that: The sliding column (7) is slidably connected to the guide groove (302), and the front end of the sliding column (7) is threadedly connected to a limiting cap (701) located on the outside of the guide groove (302).

7. The four-wheel electronic parking brake device for new energy vehicles according to claim 1, characterized in that: The outer sides of the plurality of groups of brake shoes (8) are each provided with a mounting groove (801), and the friction lining (9) is fixedly mounted on the inner side of the mounting groove (801) by means of a plurality of groups of screws.

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