Electric vehicle parking device
The electric vehicle parking system addresses electromagnetic brake limitations by using a pre-pressure adjustment mechanism to ensure secure parking on steep slopes without power, enhancing safety and reducing costs.
Patent Information
- Application Number
- CN202422314409.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The electromagnetic brakes of existing low-speed electric vehicles have limited braking torque when parking and complex structure, requiring special motor or rear axle design, which increases the cost of restructuring and safety risks.
The pre-pressure adjustment nut, electric push rod, connecting ring, pre-pressure spring, connecting plate, telescopic rod and balancer are used to control the movement of the electric push rod through an electronic parking switch, and the automatic brake and loosening of the soft shaft pulling line of the right brake and the left brake are achieved to avoid human operation errors. The two-way movement of the electric push rod is controlled by the relay to realize the automatic parking and driving state switching of the vehicle.
It realizes that without changing the motor or rear axle structure, improves the safety and reliability of parking, reduces the risk of slipping caused by human operation errors, reduces the cost of restructuring, and ensures that the vehicle can park automatically without power.
Smart Images
Figure CN223100683U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric vehicle parking, and more specifically, it relates to an electric vehicle parking device. Background Art
[0002] The parking device of a low-speed electric vehicle uses a handbrake to pull a brake flexible cable to expand and hold the brake shoes of the rear-wheel drum brake, hindering the rotation of the rear wheels to achieve vehicle parking. For parking on a heavy-load large slope, there is a safety risk that the handbrake cannot be tightened and the vehicle will roll back.
[0003] To solve this problem, some low-speed vehicles adopt the form of an electronic brake behind the motor or the rear axle. Normally, the electronic brake is not powered, and the electromagnetic brake is in a locked state. When the vehicle is running, the electronic brake is powered, and the electromagnetic brake is disengaged. The problem is that the braking torque of the electromagnetic brake is limited, and there are special requirements for the motor or the rear axle, and the structure is complex.
[0004] Therefore, to solve the above technical problems, this application proposes an electric vehicle parking device. Content of the Utility Model
[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an electric vehicle parking device to solve the problems proposed in the above background art, that is, the electromagnetic brake is in a locked state, the electronic brake is powered when the vehicle is running, the electromagnetic brake is disengaged, the problem is that the braking torque of the electromagnetic brake is limited, there are special requirements for the motor or the rear axle, and the structure is complex.
[0006] To achieve the above purpose, the utility model provides the following technical solution: An electric vehicle parking device includes a pre-pressure adjusting nut, a screw rod body is arranged inside the pre-pressure adjusting nut, an electric push rod is arranged on the back of the screw rod body, a connecting ring is installed on the back of the electric push rod, and a pre-pressure spring is arranged on the back of the connecting ring;
[0007] A connecting plate is installed on the back of the pre-pressure spring, and an expansion rod is arranged between the connecting plate and the connecting ring, and there are two groups of expansion rods;
[0008] A balancer is installed on the back of the connecting plate, and a right brake flexible cable and a left brake flexible cable are installed on the back of the balancer from left to right in sequence.
[0009] Preferably, a right brake is connected to the back of the right brake flexible cable, and a left brake is connected to the back of the left brake flexible cable.
[0010] Preferably, a connecting frame is connected to the back of the right brake, and a left brake is installed at one end of the connecting frame away from the right brake.
[0011] Preferably, a rear axle body is provided on the outer surface of the connecting frame, and a motor body is installed on the outer surface of the rear axle body.
[0012] Preferably, a second support ring is provided on the lower surface of the right brake flexible cable, a side block is installed on the outer surface of the second support ring, and a connecting block is provided on the top surface of the side block.
[0013] Preferably, a first support ring is provided on the lower surface of the left brake flexible cable, and the first support ring has the same structure as the second support ring.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. In the utility model, through the pre-pressure adjusting nut, screw rod body, electric push rod, connecting ring, pre-pressure spring, connecting plate, telescopic rod, balancer, right brake flexible cable, left brake flexible cable, right brake, left brake and connecting frame are provided. When in use, first, the right brake and the left brake remain unchanged, and the flexible cables of the brake are retained; a pre-pressure spring and an electric push rod or an electro-hydraulic push rod are added between the connecting rings. The pressing force of the pre-pressure spring is adjusted through the pre-pressure adjusting nut and the screw rod body, and the right brake flexible cable and the left brake flexible cable are pulled to achieve the brake holding strength of the brake. Before the vehicle travels, by pulling the electronic parking switch through the relay, an electrical signal is given to the motor of the electric push rod or the electro-hydraulic push rod, and the electric push rod or the electro-hydraulic push rod applies an opposite thrust to overcome the resistance of the pre-pressure spring, so that the right brake flexible cable and the left brake flexible cable are released, and the right brake and the left brake are loosened, and the vehicle travels. During the driving process, the hydraulic brake of the service brake works normally. When parking, the electronic parking switch is pressed down, the electric push rod automatically retracts, and the pre-pressure spring restores the pre-pressing force to maintain the brake. This design focuses on solving the problem that the motor and rear axle components of conventional low-speed electric vehicles do not need to be modified, adopts electronic parking, reduces the operating force, avoids the risk of accidental slipping of the vehicle caused by incorrect operation of the handbrake by humans, and realizes automatic parking of the vehicle without power, solves the risk of vehicle slipping when parking on a heavy-load large slope. The rear axle motor of the existing vehicle does not need to be modified, and the production cost of the transformation is relatively high compared with the high cost of automotive electronic parking. The pulling force of the right brake flexible cable and the left brake flexible cable is large, which avoids control by human factors and the risk of the handbrake not being pulled in place and vehicle slipping. When the vehicle stops and the parking rocker switch returns to its original position, the electric push rod returns to its original position. Even if the vehicle loses power, the vehicle still parks. Only when there is power, the vehicle will move and be driven by human operation, improving safety. The right brake flexible cable and the left brake flexible cable are pre-tensioned by the pre-pressure spring to achieve vehicle braking. The pre-pressure spring is released by the electric push rod or the electro-hydraulic push rod, and the right brake flexible cable and the left brake flexible cable return to their original positions to achieve the release of vehicle braking. The two-way movement of the electric push rod or the electro-hydraulic push rod is controlled by an electronic switch + relay.
[0016] 2. In the present utility model, through the arranged side blocks, second support rings, connection blocks and first support rings, during use, first, the side blocks and connection blocks are connected to external connection components, so that through the design of the second support ring, the position of the right brake flexible cable can be limited. Similarly, the first support ring can also limit and convey the left brake flexible cable, preventing the right brake flexible cable and the left brake flexible cable from not being able to move in real time during operation. The overall movement effect is good, reflecting the practicability of the design. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0018] Figure 1 is a three-dimensional schematic diagram of the structure of the present utility model;
[0019] Figure 2 is a three-dimensional schematic diagram of the structure of the right brake and the connecting frame of the present utility model;
[0020] Figure 3 is a three-dimensional schematic diagram of the structure of the electric push rod and the balancer of the present utility model;
[0021] Figure 4 is a three-dimensional schematic diagram of the structure of the second support ring of the present utility model.
[0022] 1. Preload adjusting nut; 2. Screw rod body; 3. Electric push rod; 4. Connecting ring; 5. Preload spring; 6. Connecting plate; 7. Telescopic rod; 8. Balancer; 9. Right brake flexible cable; 10. Left brake flexible cable; 11. Right brake; 12. Left brake; 13. Connecting frame; 14. Rear axle body; 15. Motor body; 16. Side block; 17. Connection block; 18. First support ring; 19. Second support ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] Refer to Figures 1 to 4 for a further description of an embodiment of a parking device for an electric vehicle of the present utility model.
[0024] The utility model provides a parking device for an electric vehicle. The electric push rod 3, telescopic rod 7, balancer 8, right brake flexible cable 9, left brake flexible cable 10, right brake 11, left brake 12, rear axle body 14 and side block 16 used in this application are all products that can be directly purchased on the market. Their principles and connection methods are all prior arts well-known to those skilled in the art, so they will not be elaborated here. It includes a preload adjusting nut 1. A screw rod body 2 is arranged inside the preload adjusting nut 1. An electric push rod 3 is arranged on the back of the screw rod body 2. A connecting ring 4 is installed on the back of the electric push rod 3. A preload spring 5 is arranged on the back of the connecting ring 4;
[0025] A connecting plate 6 is installed on the back of the preload spring 5. A telescopic rod 7 is arranged between the connecting plate 6 and the connecting ring 4. Two groups of telescopic rods 7 are provided;
[0026] Balancer 8 is installed on the back of the connecting plate 6. The right brake cable pull wire 9 and the left brake cable pull wire 10 are successively installed on the back of the balancer 8 from left to right. The back of the right brake cable pull wire 9 is connected to the right brake 11, and the back of the left brake cable pull wire 10 is connected to the left brake 12. The back of the right brake 11 is connected to the connecting frame 13. One end of the connecting frame 13 away from the right brake 11 is installed with the left brake 12. First, keep the right brake 11 and the left brake 12 unchanged, and retain the flexible cable of the brake. Add a preloading spring 5 and an electric push rod 3 or an electro-hydraulic push rod between the connecting rings 4. Adjust the pressing force of the preloading spring 5 through the preloading adjusting nut 1 and the screw body 2, and pull the right brake cable pull wire 9 and the left brake cable pull wire 10 to achieve the brake holding strength of the brake. Before the vehicle travels, by pulling the electronic parking switch through the relay, an electrical signal is given to the electric push rod 3 or the electro-hydraulic push rod motor. The electric push rod 3 or the electro-hydraulic push rod exerts an opposite thrust to overcome the resistance of the preloading spring 5, so that the right brake cable pull wire 9 and the left brake cable pull wire 10 are released, and the right brake 11 and the left brake 12 are loosened, and the vehicle travels. During the driving process, the service brake hydraulic brake works normally. When parking, press the electronic parking switch, and the electric push rod 3 automatically retracts, and the preloading spring 5 restores the preloading force to maintain the brake. The key to this design is to solve the problem that the motor and the rear axle components of the conventional low-speed electric vehicle do not need to be modified. Adopt electronic parking to reduce the operating force, avoid the risk of accidental or improper slipping of the vehicle due to manual operation of the handbrake, and achieve automatic parking of the vehicle without power, solve the risk of the vehicle slipping when parked on a heavy-load large slope. The existing vehicle rear axle motor does not need to be modified, and the production cost of the retrofit is relatively high compared with the high cost of automotive electronic parking. The pulling force of the right brake cable pull wire 9 and the left brake cable pull wire 10 is large, avoiding human factor control and the risk of the handbrake not being pulled in place and the vehicle slipping. When the vehicle stops and the parking toggle switch returns to its position, the electric push rod 3 returns to its position. Even if the vehicle loses power, the vehicle is still parked. Only when there is power, the vehicle will move and be driven manually, improving safety. Adopt the preloading spring 5 to pre-tension the right brake cable pull wire 9 and the left brake cable pull wire 10 to achieve vehicle braking. Use the electric push rod 3 or the electro-hydraulic push rod to release the preloading spring 5, and the right brake cable pull wire 9 and the left brake cable pull wire 10 return to their positions to achieve the release of vehicle braking. Adopt an electronic switch + relay to control the bidirectional movement of the electric push rod 3 or the electro-hydraulic push rod.
[0027] The outer surface of the connecting frame 13 is provided with a rear axle body 14, and the outer surface of the rear axle body 14 is installed with a motor body 15. Through the design of the rear axle body 14 and the motor body 15, the whole can be driven.
[0028] The lower surface of the right brake flexible cable 9 is provided with a second support ring 19. A side block 16 is installed on the outer surface of the second support ring 19. A connecting block 17 is provided on the top surface of the side block 16. The lower surface of the left brake flexible cable 10 is provided with a first support ring 18. The first support ring 18 has the same structure as the second support ring 19. First, it is connected to an external connecting member through the side block 16 and the connecting block 17. Thus, the position of the right brake flexible cable 9 can be limited through the design of the second support ring 19. Similarly, the first support ring 18 can also limit and convey the left brake flexible cable 10, preventing the right brake flexible cable 9 and the left brake flexible cable 10 from not being able to move in real time during operation, and the overall movement effect is good.
[0029] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any ordinary technician in the industry can smoothly implement the present invention as shown in the accompanying drawings of the specification and described above. However, any equivalent changes such as slight modifications, refinements, and evolutions made by those skilled in the art within the scope of the technical solution of the present invention using the technical content disclosed above are equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essence of the present invention still fall within the scope of protection of the technical solution of the present invention.
Claims
1. An electric vehicle parking device, including a preloading adjustment nut (1), inside which a screw rod body (2) is arranged, and an electric push rod (3) is arranged on the back of the screw rod body (2), characterized in that: A connection ring (4) is installed on the back surface of the electric push rod (3), and a preloading spring (5) is arranged on the back surface of the connection ring (4); A connecting plate (6), the connecting plate (6) is installed on the back surface of the preloading spring (5), and a telescopic rod (7) is arranged between the connecting plate (6) and the connection ring (4), and two groups of telescopic rods (7) are provided; A balancer (8), the balancer (8) is installed on the back surface of the connecting plate (6), and a right brake flexible cable (9) and a left brake flexible cable (10) are sequentially installed on the back surface of the balancer (8) from left to right.
2. The electric vehicle parking device according to claim 1, characterized in that: The back surface of the right brake flexible cable (9) is connected to a right brake (11), and the back surface of the left brake flexible cable (10) is connected to a left brake (12).
3. The electric vehicle parking device according to claim 2, characterized in that: The back surface of the right brake (11) is connected to a connecting frame (13), and a left brake (12) is installed at one end of the connecting frame (13) away from the right brake (11).
4. The electric vehicle parking device according to claim 3, wherein: The outer surface of the connecting frame (13) is provided with a rear axle body (14), and a motor body (15) is installed on the outer surface of the rear axle body (14).
5. An electric vehicle parking device according to claim 1, characterized in that: The lower surface of the right brake flexible cable (9) is provided with a second support ring (19), the outer surface of the second support ring (19) is installed with a side block (16), and a connecting block (17) is arranged on the top surface of the side block (16).
6. An electric vehicle parking device according to claim 1, characterized in that: The lower surface of the left brake flexible cable (10) is provided with a first support ring (18), and the first support ring (18) has the same structure as the second support ring (19).