Pedal simulator of hydraulic integrated brake
By optimizing the cylinder's embedded sealing ring, stepped cover, and multi-layer spring structure, the problems of large size and heavy weight of the pedal simulator were solved, achieving a compact structural design, reducing costs, and improving mechanical performance.
Patent Information
- Application Number
- CN202520017370.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing pedal simulators for hydraulic integrated brakes are large in size and heavy in weight due to their large spring structure, which increases the difficulty of design and assembly, and thus increases production costs.
The system employs an internal sealing ring, a stepped cover, a multi-layer spring structure, and a rubber spring design. By optimizing the component structure and arrangement, the volume of the spring components is reduced, the space occupied by the cover is reduced by utilizing the piston's internal space, and the system's stability and mechanical performance are improved.
It effectively reduces the size and weight of the pedal simulator, lowers R&D and production costs, improves the simulator's mechanical performance and stability, and provides more space for parts arrangement.
Smart Images
Figure CN223546293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic integrated brake technology, specifically to a pedal simulator for a hydraulic integrated brake. Background Technology
[0002] Electro-hydraulic integrated brakes are a crucial component of modern automotive braking systems. Combining electronic control and hydraulic technology, they offer high precision and rapid response. The core function of this brake is to precisely regulate the flow and pressure of the brake fluid through an electronic control system, thereby achieving effective braking of the vehicle. A pedal simulator is a component of the electro-hydraulic integrated brake system used to simulate the feeling of pressing the brake pedal.
[0003] The existing simulator structure is mainly composed of multiple springs of different sizes, spring seats, push rods and pistons. Due to the design requirements to use large-sized springs and to meet specific diameter, stroke and load capacity requirements, the large spring structural components are large in size, and the piston inner hole head structure has a lot of empty space. The entire simulator is large in size and heavy, which increases the design and assembly difficulty, resulting in a low yield rate and high production cost. Utility Model Content
[0004] The purpose of this utility model is to provide a pedal simulator for a hydraulic integrated brake in order to solve the above problems.
[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:
[0006] A cylinder body, wherein a piston is installed inside the cylinder body, and the middle part of the piston and the bottom of the push rod are riveted together;
[0007] A first spring is sleeved in the middle of the push rod, and a first spring seat is installed on the top of the first spring. A second spring is sleeved on the outside of the push rod, and a second spring seat is installed on the top of the second spring.
[0008] One end of the first spring abuts against the piston, the other end of the first spring abuts against the first spring seat, one end of the second spring abuts against the first spring seat, and the top of the second spring abuts against the second spring seat.
[0009] As a further description of the above technical solution, the tops of the first spring seat and the second spring seat are arranged opposite each other, the first spring seat is provided with a first bent portion, and the second spring seat is provided with a second bent portion.
[0010] As a further description of the above technical solution, the first bent portion and one end of the second spring abut against each other, and the second bent portion and the other end of the second spring abut against each other.
[0011] As a further description of the above technical solution, the diameter of the first spring is smaller than the diameter of the second spring, and the stroke of the first spring is smaller than the stroke of the second spring.
[0012] As a further description of the above technical solution, the push rod passes through the first spring seat and the second spring seat, and the top of the push rod is provided with a spherical surface.
[0013] As a further description of the above technical solution, an inner groove is provided in the middle of the cylinder body, and the inner groove is used to embed a sealing ring.
[0014] As a further description of the above technical solution, flow holes are provided on the top and bottom of one side of the cylinder body, and a cover is fixed to the outside of the cylinder body by riveting.
[0015] As a further description of the above technical solution, the cover is provided with a first step and a second step, the first step and the internal step groove of the cylinder are riveted together, and an adjustment sleeve is interference-fitted into the inside of the second step.
[0016] As a further description of the above technical solution, a third spring is embedded inside the cover, and a boss is provided at the bottom of the third spring.
[0017] As a further description of the above technical solution, the piston is provided with an installation groove on its exterior, and a sealing ring is fitted into the installation groove.
[0018] The beneficial effects of this utility model are as follows:
[0019] 1. This utility model, by changing the structure of components such as the cover, the first spring seat, and the second spring seat, makes the first spring contained within the second spring. At the same time, it makes full use of the space of the piston inner hole head structure, effectively reducing the volume of the spring structure component, making the entire pedal simulator structure more compact, effectively reducing the volume and weight of the pedal simulator, and making the arrangement volume on the brake valve block smaller, which can provide more space for the arrangement of other parts.
[0020] 2. In this utility model, an adjustment sleeve is embedded inside the housing as a limiting sleeve for piston movement. By adjusting the length, the simulator can be adapted to more design schemes without redesigning the simulator scheme, which effectively reduces the research and development cost.
[0021] 3. In this utility model, the rubber third spring is placed inside the cover, which can effectively reduce the space occupied by the cover. The ball part of the top rod head and the bottleneck-shaped protrusion of the third spring can effectively reduce the impact force between the top rod and the third spring, thereby improving the mechanical performance of the pedal simulator.
[0022] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the pedal simulator structure of the hydraulic integrated brake of this utility model. Figure 1 ;
[0024] Figure 2 This is a schematic diagram of the pedal simulator structure of the hydraulic integrated brake of this utility model. Figure 2 ;
[0025] Figure 3 This is a schematic diagram of the pedal simulator structure of the hydraulic integrated brake of this utility model. Figure 3 ;
[0026] Figure 4 This is a schematic diagram of the pedal simulator structure of the hydraulic integrated brake of this utility model. Figure 4 ;
[0027] Figure 5 yes Figure 1 Schematic diagram of the center jack;
[0028] Figure 6 yes Figure 1 A schematic diagram of the structure of the first spring;
[0029] Figure 7 yes Figure 1 Schematic diagram of the structure of the first spring seat;
[0030] Figure 8 yes Figure 1 A schematic diagram of the structure of the second spring;
[0031] Figure 9 yes Figure 1 Schematic diagram of the structure of the second spring seat;
[0032] Figure 10 yes Figure 1 Schematic diagram of the middle cover;
[0033] Figure 11 yes Figure 1 A schematic diagram of the structure of the third spring;
[0034] Figure 12 yes Figure 1 Schematic diagram of the structure of the adjusting sleeve;
[0035] Figure 13 yes Figure 1 A schematic diagram of the assembled piston parts.
[0036] Figure label:
[0037] 1. Cylinder block; 11. Inner bore groove; 12. Flow hole; 13. Step groove; 2. Piston; 21. Mounting groove; 3. Push rod; 31. Spherical part; 4. First spring; 5. First spring seat; 51. First bend; 6. Second spring; 7. Second spring seat; 71. Second bend; 8. Sealing ring; 9. Cover; 91. First step; 92. Second step; 10. Third spring; 101. Boss; 14. Adjusting sleeve. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0039] In existing technologies, the most commonly used simulator structure on the market mainly consists of three springs and interconnected parts. Its working process is as follows: when brake fluid enters the cylinder, it pushes the piston forward. The piston first compresses the small spring, while the large spring is also slightly compressed under the action of the small spring. After the piston contacts the small spring seat, the small spring stops compressing. Then, the large spring continues to compress until the push rod pushes the rubber spring. The piston reaches its limit after contacting the adjusting sleeve. After the hydraulic oil in the cylinder is released, the parts return to their initial positions under the action of the spring force. However, the simulator piston stroke is not exactly the same each time the brake is applied. Due to the arrangement, diameter, and stroke requirements of the large spring, the simulator is relatively large, occupies a lot of space, and the overall structure is not conducive to assembly, resulting in high manufacturing costs.
[0040] like Figures 1-13 As shown, in one embodiment, a pedal simulator for a hydraulically integrated brake includes: a cylinder body 1, a piston 2 installed inside the cylinder body 1, a sealing ring 8 fitted onto the outside of the piston 2 through a mounting groove 21, and the middle part of the piston 2 being fixed to the bottom of a push rod 3 by riveting to ensure sufficient mechanical feedback during operation. An inner groove 11 is provided in the middle of the cylinder body 1 for embedding the sealing ring 8. The sealing ring 8 effectively prevents liquid or gas leakage, ensuring the system's sealing performance and pressure stability.
[0041] Furthermore, flow holes 12 are provided on the top and bottom of one side of the cylinder body 1. A cover 9 is fixed to the outside of the cylinder body 1 by riveting. The cover 9 is integrally formed by stamping and adopts a stepped structure with a first step 91 and a second step 92. This stepped design not only improves the stability of the structure, but also allows for better connection with the cylinder body 1. Specifically, the first step 91 is riveted to the internal stepped groove 13 of the cylinder body 1, which enhances the stability between the cylinder body 1 and the cover 9 and the overall structural strength. An adjusting sleeve 14 is interference-fitted into the second step 92 as a limiting sleeve for the movement of the piston 2. By adjusting the length of the adjusting sleeve 14, the stroke of the piston 2 can be flexibly adjusted as needed, thereby achieving adaptation to different design schemes. Therefore, there is no need to redesign the entire simulator scheme; only the adjusting sleeve 14 in the cover 9 needs to be adjusted to meet different usage requirements, effectively reducing research and development and production costs.
[0042] like Figures 1-13 As shown, in this embodiment, a first spring 4 is sleeved in the middle of the push rod 3, and a first spring seat 5 is installed on the top of the first spring 4. A second spring 6 is sleeved on the outside of the push rod 3, and a second spring seat 7 is installed on the top of the second spring 6. The first spring 4 and the second spring 6 together share the pressure of the pedal simulator, ensuring that the system can provide stable mechanical feedback under various loads. One end of the first spring 4 abuts against the piston 2, and the other end abuts against the first spring seat 5. One end of the second spring 6 abuts against the first spring seat 5, and the top of the second spring 6 abuts against the second spring seat 7. The tops of the first spring seat 5 and the second spring seat 7 are arranged opposite each other. This parallel configuration allows each spring to work synergistically during system operation, improving the overall load-bearing capacity and stability of the system.
[0043] Furthermore, the first spring seat 5 is provided with a first bent portion 51, and the second spring seat 7 is provided with a second bent portion 71. The first bent portion 51 abuts against one end of the second spring 6, and the second bent portion 71 abuts against the other end of the second spring 6. Specifically, the first spring 4 and the second spring 6 are made of steel wire cylindrical helical springs using a metal stamping process. The steel wire material springs have good durability and elasticity, and can maintain stable performance during long-term use. The diameter of the first spring 4 is smaller than that of the second spring 6, and the stroke of the first spring 4 is smaller than that of the second spring 6. This not only improves the load-bearing capacity of the system, but also enhances the stability and durability of the spring system, ensuring that the pedal simulator can provide accurate simulation feedback in different usage scenarios.
[0044] The push rod 3 passes through the first spring seat 5 and the second spring seat 7 and is interference-fitted to the piston 2. This connection method ensures a tight fit and efficient force transmission between the various components. By assembling the push rod 3, piston 2, first spring 4, second spring 6, first spring seat 5, and second spring seat 7 into a single component and then installing it into the cylinder body 1, the coordinated operation of each component can be ensured, thereby optimizing the performance of the entire pedal simulator. In addition, through the meticulous design of the structure of components such as the cover 9, first spring seat 5, and second spring seat 7, the first spring 4 is placed inside the second spring 6, which greatly saves structural space and makes full use of the space in the inner head of the piston 2, further reducing the volume of the spring structure. This design makes the overall structure of the pedal simulator more compact, effectively reducing the volume of the spring structure, making the entire pedal simulator structure more compact, effectively reducing the size and weight of the pedal simulator, and making the arrangement on the brake valve block smaller, providing more space for the arrangement of other parts.
[0045] like Figures 1-13 As shown, in this embodiment, the top of the push rod 3 is provided with a spherical part 31, and a third spring 10 is embedded inside the cover 9. The bottom of the third spring 10 is provided with a boss 101. The rubber third spring 10 is placed inside the cover 9. The flexibility of rubber allows it to withstand deformation within a large range and quickly return to its original shape after being subjected to force. At the same time, it can effectively reduce the space occupied by the cover 9. The design of the spherical part 31 at the head of the push rod 3 and the bottleneck-shaped boss 101 of the third spring 10 can effectively reduce the impact force between the push rod 3 and the third spring 10, making the force transmission more stable, thereby improving the mechanical performance curve of the pedal simulator and avoiding the impact of sudden impact or vibration on the system common in traditional designs.
[0046] Working principle:
[0047] When brake fluid flows into cylinder 1, the hydraulic pressure gradually increases. Under the action of hydraulic pressure, piston 2 moves along the axis of cylinder 1, gradually compressing the first spring 4. At the same time, the force of the first spring 4 is transmitted to the second spring 6 through the first spring seat 5. The second spring 6 is compressed. Since the stiffness of the second spring 6 is much smaller than that of the first spring 4, as the second spring 6 and the first spring 4 are gradually compressed, the first spring seat 5 comes into contact with the piston 2, and the first spring 4 is no longer compressed. At this time, the distance between piston 2 and the sleeve inside the cover 9, and the distance between push rod 3 and the rubber spring, all become closer (the change in the force of the first spring 4 with the piston displacement is used to simulate the initial performance curve of the pedal simulator; at this time, the relative positions of each part are as follows). Figure 2 (as shown);
[0048] Piston 2 continues to move along the axis under hydraulic pressure, gradually pushing push rod 3 to further compress the second spring 6. After the second spring 6 is compressed to a certain extent, push rod 3 contacts the third spring 10 (the change in the force of the second spring 6 with the piston displacement is used to simulate the mid-section performance curve of the pedal simulator; at this time, the positional state of each part is as follows). Figure 3 (as shown);
[0049] Piston 2 continues to move along the axis under hydraulic pressure, gradually pushing push rod 3 to compress the second spring 6. Simultaneously, the third spring 10 is also compressed. After the third spring 10 completes its compression stroke, the end of piston 2 contacts the adjusting sleeve 14 inside simulator housing 9. Since housing 9 is a rigid component, piston 2 stops moving forward. At this point, piston 2 reaches its limit stroke (the changes in the forces of the second spring 6 and the third spring 10 with piston displacement are used to simulate the third segment of the pedal simulator's performance curve; at this point, the positions of each component are as follows). Figure 4 (as shown);
[0050] As brake fluid flows out of cylinder 1, the hydraulic pressure gradually decreases, and the components return to their initial positions under the action of the spring force (e.g., ...). Figure 1 (As shown).
[0051] Through the above technical solution, this application changes the structure of components such as the cover 9, the first spring seat 5, and the second spring seat 7, so that the first spring 4 is contained within the second spring 6. At the same time, it makes full use of the space of the inner hole head structure of the piston 2, effectively reducing the volume of the spring structure component, making the entire pedal simulator structure more compact, effectively reducing the volume and weight of the pedal simulator, and making the arrangement volume on the brake valve block smaller, which can provide more space for the arrangement of other parts.
[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pedal simulator for a hydraulically integrated brake, characterized in that, include: A cylinder body (1) is provided, and a piston (2) is installed inside the cylinder body (1). The middle part of the piston (2) is riveted to the bottom of the push rod (3). A first spring (4) is sleeved in the middle of the top rod (3), and a first spring seat (5) is installed on the top of the first spring (4). A second spring (6) is sleeved on the outside of the top rod (3), and a second spring seat (7) is installed on the top of the second spring (6). One end of the first spring (4) abuts against the piston (2), the other end of the first spring (4) abuts against the first spring seat (5), one end of the second spring (6) abuts against the first spring seat (5), and the top of the second spring (6) abuts against the second spring seat (7).
2. The pedal simulator for the hydraulic integrated brake according to claim 1, characterized in that, The tops of the first spring seat (5) and the second spring seat (7) are arranged opposite each other. The first spring seat (5) is provided with a first bent portion (51), and the second spring seat (7) is provided with a second bent portion (71).
3. The pedal simulator for the hydraulic integrated brake according to claim 2, characterized in that, The first bent portion (51) and the second spring (6) abut at one end, and the second bent portion (71) and the second spring (6) abut at the other end.
4. The pedal simulator for the hydraulic integrated brake according to claim 3, characterized in that, The diameter of the first spring (4) is smaller than the diameter of the second spring (6), and the stroke of the first spring (4) is smaller than the stroke of the second spring (6).
5. The pedal simulator for the hydraulic integrated brake according to claim 1, characterized in that, The push rod (3) passes through the first spring seat (5) and the second spring seat (7), and the top of the push rod (3) is provided with a spherical part (31).
6. The pedal simulator for the hydraulic integrated brake according to claim 1, characterized in that, The cylinder body (1) has an inner groove (11) in the middle, which is used to embed a sealing ring (8).
7. The pedal simulator for the hydraulic integrated brake according to claim 6, characterized in that, The cylinder body (1) has flow holes (12) on the top and bottom of one side, and a cover (9) is fixed to the outside of the cylinder body (1) by riveting.
8. The pedal simulator for the hydraulic integrated brake according to claim 7, characterized in that, The cover (9) is provided with a first step (91) and a second step (92). The first step (91) is riveted to the internal step groove (13) of the cylinder (1). An adjustment sleeve (14) is interference-fitted into the interior of the second step (92).
9. The pedal simulator for the hydraulic integrated brake according to claim 7, characterized in that, The cover (9) has a third spring (10) embedded inside, and the bottom of the third spring (10) is provided with a boss (101).
10. The pedal simulator for the hydraulic integrated brake according to claim 1, characterized in that, The piston (2) is provided with an installation groove (21) on the outside, and a sealing ring (8) is fitted on the installation groove (21).