Pedal simulator of hydraulic integrated brake

Abstract

The utility model discloses a pedal simulator of a hydraulic integrated brake, which comprises a cylinder body, a piston mounted in the cylinder body, and an ejector rod mounted in the piston; a first spring is installed between the ejector rod and the piston, and the ejector rod is sleeved with a second spring. According to the utility model, the head structural space of the inner hole of the piston is fully utilized, and the volume of a spring structural part is effectively reduced, so that the whole pedal simulator is more compact in structure, and the volume and weight of the pedal simulator are effectively reduced; the ejector rod is in contact with the inner wall of the piston, eccentric force of the ejector rod pushing the rubber spring can be corrected without a spring seat, the lateral stress state of the piston is improved, and the service life of the piston and the service life of a sealing ring are effectively prolonged. The third spring made of rubber is placed in the housing, and the design of the boss part at the head of the ejector rod and the bottleneck-shaped boss part of the third spring can effectively reduce the impact force between the ejector rod and the third spring, thereby improving the smoothness of the connection force between the third spring and the ejector rod in contact transition when the third spring begins to participate in work.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic integrated brake technology field, concretely relates to a pedal simulator of hydraulic integrated brake. BACKGROUND

[0002] Electronic hydraulic integrated brake is a kind of high-efficiency braking technology that combines electronic control with hydraulic system, and is widely used in the fields of automobile, commercial vehicle and high-end mechanical equipment etc.The core feature is that the braking effect of hydraulic system is accurately regulated by electronic control unit (ECU), replacing the traditional mechanical connection braking mode.Electronic hydraulic integrated brake can realize more sensitive and efficient braking response, and improve the reliability and stability of braking system.

[0003] The existing simulator structure is mainly composed of multiple spring, spring seat, ejector rod and piston etc.parts of different sizes, due to design requirement needs to use large size spring, and needs to meet specific diameter, stroke and load capacity, which leads to the volume of large spring structure piece is larger;At the same time, the free space of piston inner hole head is more, so that the volume of whole simulator is huge, and the weight is heavier, thereby increasing the difficulty of design and assembly, thus leading to lower yield, so that the production cost is higher. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of pedal simulator of hydraulic integrated brake, to solve above-mentioned problem.

[0005] The utility model discloses a kind of pedal simulator of hydraulic integrated brake, to solve above-mentioned problem.

[0006] Cylinder body, the cylinder body inside installation has piston, the piston inside installation has ejector rod;

[0007] First spring is installed between the ejector rod and the piston, one end of the first spring and the piston abut, the other end of the first spring and the ejector rod abut;Second spring is sleeved on the outside of the ejector rod, one end of the second spring and the ejector rod abut, the other end of the second spring and the cylinder body abut;The diameter of the first spring is less than the diameter of the second spring, and the stroke of the first spring is less than the stroke of the second spring.

[0008] As further description of the above technical scheme, the bottom of the piston is provided with inner recess, and one end of the first spring is installed in the inner recess along the axis.

[0009] As further description of the above technical scheme, the outside of the piston is provided with mounting groove, and the mounting groove is sleeved with sealing ring.

[0010] As a further description of the above technical solution, the top rod bottom is provided with an embedded part, the other end of the first spring is installed in the embedded part along the axis, the top rod bottom is provided with an extension part, and the one end of the second spring and the extension part abut.

[0011] As a further description of the above technical solution, the top rod is connected with the first spring and the second spring, and the top rod top is provided with a top protruding part.

[0012] As a further description of the above technical solution, the middle part of the cylinder body is provided with an inner hole groove, and the inner hole groove is used for embedding a sealing ring.

[0013] As a further description of the above technical solution, the top and bottom of one side of the cylinder body are provided with flow-through holes, and the outside of the cylinder body is fixed with a cover shell through riveting pressure.

[0014] As a further description of the above technical solution, the cover shell is provided with a first step part and a second step part, the first step part is riveted with the inner step groove of the cylinder body, and the inner second step part abuts against the second spring.

[0015] As a further description of the above technical solution, the inside of the cover shell is embedded with a third spring, and the bottom of the third spring is provided with a boss part.

[0016] As a further description of the above technical solution, a spring seat is arranged between the second spring and the top rod, the spring seat and the top rod are oppositely arranged, the spring seat is provided with a bending part, and the bending part abuts against the second spring.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The utility model discloses a brake pedal simulator, which changes the structures of a cover shell, a first spring and a second spring and the like components, connects the first spring and the second spring through a top rod, fully utilizes the structure space of a piston inner hole head, effectively reduces the volume of spring structural components, makes the whole brake pedal simulator structure more compact, effectively reduces the volume and weight of the brake pedal simulator, and the arrangement volume on a brake valve block is smaller, so that a larger space can be provided for the arrangement of other parts.

[0019] 2. The utility model discloses a brake pedal simulator, which connects a first spring and a second spring through a top rod, arranges the first spring and the second spring in a piston, and makes the top rod contact with the inner wall of the piston, so that the eccentric force of the top rod pushing a rubber spring can be corrected without a spring seat, the lateral stress state of the piston is improved, and the service life of the piston and a sealing ring is effectively improved.

[0020] 3. The utility model discloses a third spring of rubber material is put into the cover shell inside, can effectively reduce the space of cover shell occupied, and the bottleneck -like boss portion design of third spring's top rod head boss portion, can effectively reduce the impact of top rod and third spring, and then improve the smoothness of third spring beginning to participate in work and the transition connection force of top rod contact.

[0021] In order to more clearly set forth the structural features and action of the utility model, below, combining with the specific embodiment and the detailed description of the utility model are carried out to the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 1 ;

[0023] Figure 2 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0024] Figure 3 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 3 ;

[0025] Figure 4 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 4 ;

[0026] Figure 5 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 5 ;

[0027] Figure 6 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0028] Figure 7 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0029] Figure 8 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0030] Figure 9 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0031] Figure 10 It is the structure schematic diagram of the utility model hydraulic integrated brake's pedal simulator Figure 2 ;

[0032] Reference signs:

[0033] 1. Cylinder block; 11. Inner groove; 12. Flow hole; 13. Step groove; 2. Piston; 21. Inner recess; 22. Mounting groove; 3. Push rod; 31. Embedded part; 32. Extension part; 33. Top protrusion; 4. First spring; 5. Second spring; 6. Sealing ring; 7. Cover; 71. First step part; 72. Second step part; 8. Third spring; 81. Boss part; 9. Spring seat; 91. Bending part. Detailed Implementation

[0034] 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.

[0035] In existing technology, 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 cover. 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 piston stroke of the simulator 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.

[0036] Example 1:

[0037] like Figure 1 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, and a sealing ring 6 fitted onto the outside of the piston 2 through a mounting groove 22 to ensure sufficient mechanical feedback can be transmitted during operation. An inner groove 11 is provided in the middle of the cylinder body 1 for embedding the sealing ring 6. The sealing ring 6 effectively prevents brake fluid leakage, ensuring the system's sealing performance and pressure stability.

[0038] Furthermore, flow holes 12 are provided on the top and bottom of one side of the cylinder body 1. A cover 7 is riveted to the outside of the cylinder body 1. The cover 7 adopts a stepped structure with a first step 71 and a second step 72. 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 71 is riveted to the internal stepped groove 13 of the cylinder body 1, enhancing the stability between the cylinder body 1 and the cover 7 and the overall structural strength. The second step 72 is used to abut against the internally installed second spring 5. The step between the first step 71 and the second step 72 on the cover 7 can limit the stroke of the piston 2.

[0039] As Figure 1 shown in the embodiment, the top rod 3 connects the first spring 4 and the second spring 5, at this time the top rod 3 adopts a solid design, the two springs are connected in series, the first spring 4 and the second spring 5 jointly play a role of sharing the pressure of the pedal simulator, and ensure that the system can provide stable mechanical feedback under various loads. Among them, one end of the first spring 4 abuts against the piston 2, the other end of the first spring 4 abuts against the top rod 3, one end of the second spring 5 abuts against the top rod 3, and the top of the second spring 5 abuts against the inner wall of the cover 7. Through the series configuration, each spring can cooperate in the system operation, improving the overall load capacity and stability of the system.

[0040] Further, the piston 2 is provided with an inner recess 21 at the bottom, and the first spring 4 is installed in the inner recess 21 along the axis. The top rod 3 is provided with an inner embedding part 31 at the bottom, and the other end of the first spring 4 is installed in the inner embedding part 31 along the axis. The bottom of the top rod 3 is provided with an extension part 32, and the one end of the second spring 5 abuts against the extension part 32.

[0041] The first spring 4 is connected to the second spring 5 through the top rod 3 and arranged in series inside the piston 2. The top rod 3 directly contacts the inner wall of the piston 2, without the need to add a spring seat 9, so as to effectively correct the eccentric force of the top rod 3 in the working process, ensure the stable movement of the top rod 3, optimize the stress state of the spring, and improve the lateral stress condition of the piston 2 in the working process. At the same time, the interaction force between the piston 2 and the sealing ring 6 is reduced, the damage to the sealing ring 6 caused by excessive lateral force is reduced, and the service life of the sealing ring 6 is effectively prolonged.

[0042] Specifically, the first spring 4 and the second spring 5 are made of steel wire cylindrical / conical spiral springs by metal stamping forming process. The spring made of steel wire has good durability and elasticity, and can maintain stable performance in a long period of use. At the same time, the diameter of the first spring 4 is smaller than the diameter of the second spring 5, and the stroke of the first spring 4 is smaller than the stroke of the second spring 5. Not only the load capacity of the system is improved, but also the stability and durability of the spring system are enhanced, so as to ensure that the pedal simulator can provide accurate simulation feedback in different use scenarios.

[0043] By assembling the ejector rod 3, the piston 2, the first spring 4 and the second spring 5 into an integral component, and then installing them into the cylinder 1, the coordinated work of the components can be ensured, thereby optimizing the performance of the entire pedal simulator; in addition, through the fine design of the structure of the cover 7, the first spring 4 and the second spring 5 can be directly arranged in series through the guide rod, thereby greatly saving the structural space, fully utilizing the space of the head of the inner hole of the piston 2, and further reducing the volume of the spring structure; such design makes the overall structure of the pedal simulator more compact, effectively reduces the volume of the spring structure, makes the structure of the entire pedal simulator more compact, effectively reduces the volume and weight of the pedal simulator, and the arrangement volume on the brake valve block is smaller, thereby providing a larger space for the arrangement of other parts.

[0044] As shown in Figs. 1-3, in the present embodiment, the ejector rod 3 is integrally formed by stamping process of metal material, thereby improving the working strength; or the ejector rod 3 can also be made of plastic material, thereby effectively reducing the working noise of the simulator.

[0045] Further, the top rod 3 is provided with a top protruding portion 33 at the top, the cover 7 is embedded with a third spring 8 through riveting fixation, and the third spring 8 is provided with a boss portion 81 at the bottom. The third spring 8 made of rubber material is placed in the cover 7, the flexibility of the rubber material enables it to withstand deformation in a larger range, and it can quickly restore to the original state after being stressed; at the same time, the space occupied by the cover 7 can be effectively reduced; the design of the top protruding portion 33 of the top rod 3 and the bottleneck-shaped boss portion 81 of the third spring 8 can effectively reduce the impact force between the top rod 3 and the third spring 8 when the top rod 3 is ejected and the third spring 8 is contacted, so that the force transmission is more stable, thereby improving the smoothness of the transition connection force between the third spring 8 and the top rod 3 when the third spring 8 starts to work, and avoiding the influence of sudden impact or vibration on the system in the traditional design.

[0046] Embodiment two:

[0047] Please continue to refer to Figures 1-2 On the basis of embodiment one, a spring seat 9 is optionally arranged between the second spring 5 and the top rod 3, and the spring seat 9 is arranged opposite to the top rod 3, and at this time the top rod 3 adopts a hollow design, thereby forming a stable support structure.

[0048] Specifically, the spring seat 9 is integrally formed by stamping process, and is provided with a bending portion 91 which abuts against the second spring 5, and through the contact with the spring, the compression process of the second spring 5 can be effectively guided and controlled, and the fluctuation of the axial movement of the top rod 3 is reduced, thereby improving the reliability and stability of the equipment operation.

[0049] Please continue to refer to Figures 1-10The working principle of the application is as follows: when the cylinder 1 flows into brake fluid, the hydraulic pressure gradually increases, the piston 2 moves along the axis of the cylinder 1 under the action of the hydraulic pressure, the first spring 4 is gradually compressed, and the force of the first spring 4 is transmitted to the second spring 5 through the top rod 3 to provide elastic force to the second spring 5, because the other end of the second spring 5 abuts against the inner wall of the cover 7, the second spring 5 is gradually compressed. After the piston 2 and the top rod 3 are in contact, the first spring 4 is no longer compressed (the change of the force of the first spring 4 with the displacement of the piston 2 simulates the performance curve of the initial stage of the pedal simulator, and the relative position state of each part is as shown in Figure 3 ;

[0050] The piston 2 continues to move along the axis under the action of the hydraulic pressure, gradually pushes the top rod 3 to continue to compress the second spring 5, and the second spring 5 is compressed to a certain extent, and then the top rod 3 contacts the third spring 8 (the change of the force of the second spring 5 with the displacement of the piston 2 simulates the performance curve of the middle stage of the pedal simulator, and the position state of each part is as shown in Figure 4 ;

[0051] The piston 2 continues to move along the axis under the action of the hydraulic pressure, gradually pushes the top rod 3 to continue to compress the second spring 5, and the third spring 8 is also compressed. After the third spring 8 is compressed to the end of the stroke, the end of the piston 2 contacts the step part between the first step part 71 and the second step part 72 of the cover 7 of the simulator, and the piston 2 can no longer move forward because the cover 7 is a rigid part. At this time, the piston 2 reaches the limit of the stroke (the change of the force of the second spring 5 and the third spring 8 with the displacement of the piston 2 simulates the performance curve of the third stage of the pedal simulator, and the position state of each part is as shown in Figure 5 ;

[0052] When the cylinder 1 flows out of the brake fluid, the hydraulic pressure gradually decreases, and each part returns to the initial position under the action of the spring force (as shown in Figure 2 .

[0053] Through the above technical scheme, the structure of the cover 7, the first spring 4 and the second spring 5 and the like is changed, the first spring 4 and the second spring 5 are connected in series through the top rod 3, the structure of the spring is effectively reduced in size by fully utilizing the space of the head structure of the inner hole of the piston 2, the structure of the entire pedal simulator is more compact, the volume and weight of the pedal simulator are effectively reduced, the arrangement volume on the brake valve block is smaller, and a larger space can be provided for the arrangement of other parts.

[0054] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended 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 hydraulic integrated brake, characterized by, The utility model relates to a cylinder (1) is installed with piston (2) inside, piston (2) is installed with top rod (3) inside, top rod (3) and piston (2) between installation have first spring (4), first spring (4) one end and piston (2) abut, first spring (4) other end and top rod (3) abut, top rod (3) outside set with second spring (5), second spring (5) one end and top rod (3) abut, second spring (5) other end and cylinder (1) abut, first spring (4) diameter is less than second spring (5) diameter, first spring (4) stroke is less than second spring (5) stroke. Piston (2) bottom is provided with inner recess (21), first spring (4) one end is installed in inner recess (21) along axis and expands outward. Piston (2) outside is provided with mounting groove (22), mounting groove (22) is set with sealing ring (6).

2. The hydraulic integrated brake pedal simulator according to claim 1, characterized in that Top rod (3) bottom is provided with inner embedding part (31), first spring (4) other end is installed in inner embedding part (31) along axis and shrinks inward, top rod (3) bottom is provided with extension part (32), second spring (5) one end and extension part (32) abut.

3. The pedal simulator of a hydraulic integrated brake according to claim 2, characterized in that, Top rod (3) is connected first spring (4) and second spring (5), top rod (3) top is provided with top convex part (33).

4. The hydraulic integrated brake pedal simulator of claim 1, wherein, Cylinder (1) middle part is provided with inner hole groove (11), and the inner hole groove (11) is used for embedding the sealing ring (6).

5. The hydraulic integrated brake pedal simulator according to claim 4, characterized in that Cylinder (1) one side top and bottom are provided with flow-through hole (12), and the cylinder (1) is fixed with the cover shell (7) through riveting pressure outside.

6. The hydraulic integrated brake pedal simulator of claim 1, wherein, The cover shell (7) is provided with a first step portion (71) and a second step portion (72), the first step portion (71) and the internal step groove (13) of the cylinder (1) are riveted, and the second step portion (72) is internally abutted with the second spring (5).

7. The hydraulic integrated brake pedal simulator according to claim 6, characterized in that The cover shell (7) is embedded with a third spring (8), and the third spring (8) is provided with a boss portion (81) at the bottom.

8. The hydraulic integrated brake pedal simulator according to claim 7, characterized in that The second spring (5) and the top rod (3) are provided with a spring seat (9), the spring seat (9) and the top rod (3) are oppositely arranged, the spring seat (9) is provided with a bending portion (91), and the bending portion (91) is abutted with the second spring (5).

9. The hydraulic integrated brake pedal simulator according to claim 8, characterized in that ​ 10. The hydraulic integrated brake pedal simulator of claim 1, wherein, ​

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