Force simulator device
By adding the first rubber to the bottom of the spring support block of the force simulator device, the smooth connection of the first, second and third spring force values is achieved, solving the problem that the existing wire-controlled pedal cannot achieve the foot-feeling effect of the traditional mechanical pedal, and improving the smoothness of the pedaling process and driving comfort.
Patent Information
- Application Number
- CN202510467867.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-06-10
AI Technical Summary
The existing wire-controlled pedals cannot achieve the end limit and full-stroke damping foot feeling like traditional mechanical pedals, resulting in unsmooth foot feeling when pedaling.
A force simulator device is designed to add the first rubber to the bottom of the spring support block, so that the force values of the first, second and third springs are connected smoother, forming an arc-shaped pedal force curve, solving the abruptness and step feeling problems during pedaling.
It realizes a smooth foot feeling throughout the stroke during the pedaling process, improves driving comfort, and solves the problem of rapid impact NVH between the first and second stages of movement.
Smart Images
Figure CN120116909A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of wire-controlled brake pedals, and in particular to a force simulator device. Background Art
[0002] The technological innovation of wire-controlled brake pedals replacing traditional mechanical brake pedals. This force simulator device is directly installed inside the wire-controlled brake pedal. Thus, it can replace the functions of the traditional pedal relying on a vacuum booster pump and a brake master cylinder. This force simulator device generates pedal force to issue a braking command. In addition to generating pedal force, most importantly, it also generates a variable damping feeling and a high-damping foot feeling at the end limit during the full stroke of the pedal. During the process, the damping increases as the force increases. Therefore, the foot feeling effect of traditional braking can be achieved, and at the same time, the cost is reduced.
[0003] Existing wire-controlled brake pedals cannot achieve the same foot feeling effect at the end limit as that of traditional mechanical pedals relying on the brake master cylinder and the damping foot feeling during the full stroke. Even if there are some force simulators that can achieve the damping foot feeling, there will be a virtual position when the pedal is stepped on, and the connection is not smooth, resulting in an unsmooth foot feeling.
[0004] Therefore, we propose a force simulator device. Summary of the Invention
[0005] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides a force simulator device. Thus, a first rubber is added to the bottom of the spring support block, and the first rubber extends downward, enabling better force value connection of the first spring, the second spring, and the third spring, and making the pedal force curve very smooth.
[0006] The technical solution adopted by the present invention is as follows:
[0007] A force simulator device, comprising:
[0008] An upper housing;
[0009] A lower housing, detachably connected to the upper housing;
[0010] Wherein, a plunger is arranged inside the upper housing and the lower housing. A friction block bracket is arranged below the plunger inside the upper housing and the lower housing. A friction block is arranged on the friction block bracket. A first spring and a second spring are arranged between the bottom inside the lower housing and the friction block bracket;
[0011] A spring support block is sleeved outside the plunger inside the upper housing and the lower housing. A first rubber is arranged at the bottom of the spring support block and extends downward; a third spring is arranged above the spring support block and is sleeved outside the plunger. A second rubber is arranged outside the third spring in the upper housing and extends downward.
[0012] Further features thereof are as follows:
[0013] A first card slot is provided in the upper housing, and a first buckle matching the first card slot is provided in the lower housing. The upper housing and the lower housing are connected through the mutual cooperation of the first card slot and the first buckle.
[0014] An O-ring is sleeved outside the plunger.
[0015] A second card slot is provided in the upper housing, and a second buckle is provided on the spring support block. The third spring is limited and pre-pressed through the cooperation of the second buckle and the second card slot.
[0016] A gap exists between the bottom of the second rubber and the top of the spring support block.
[0017] A gap exists between the bottom of the first rubber and the top of the lower housing.
[0018] Grooves corresponding to the first spring and the second spring are provided at the bottom of the inner side of the lower housing and the bottom of the friction block bracket.
[0019] The first spring is arranged inside the second spring.
[0020] The beneficial effects of the present invention are as follows:
[0021] The structure of the present invention is compact and reasonable, and the operation is convenient. By adding the first rubber at the bottom of the spring support block, and the first rubber extends downward, so that the first spring, the second spring and the third spring have better force value connection, making the pedal force curve very smooth, and there is no obvious abruptness and step feeling in the pedaling feel, and the whole stroke is very smooth. At the same time, it also solves the NVH problem of rapid impact from the first stage of movement to the second stage of movement. By designing the first rubber, the non-linear force value generated by the first rubber, plus the force values of the first spring and the second spring when they contact the first rubber in the first stage of movement, and then just connect with the force value of the third spring, there is no obvious force value mutation. Therefore, the formed arc-shaped test curve has no protrusion, generating a smooth driving feel and improving driving comfort.
[0022] At the same time, the present invention also has the following advantages:
[0023] (1) The first spring and the second spring are arranged in the lower housing, which produces a redundant design. Even if one of the first spring and the second spring is damaged, the other spring can still work and will not affect the normal use of the full-stroke force output of the pedal. Increasing the stroke of the second rubber makes the end pedal force also form a redundant design. The third spring and the second rubber jointly bear the end force. If one fails, the other can still work normally.
[0024] (2) When the force simulator is compressed to the end, it can produce a high damping feeling, avoiding the hard limit at the end of the stroke, so that the driver can feel enough damping when he instantly steps on the end point of the stroke, improving driving comfort. It can achieve the same end limit effect as the traditional mechanical pedal relying on the brake master cylinder.
[0025] (3) During the pedaling process, the full stroke is divided into four stages of movement. During the first stage of pedal movement, the first spring and the second spring are compressed; during the second stage of pedal movement, the first spring, the second spring and the first rubber are compressed together; during the third stage of pedal movement, the first spring, the second spring and the third spring are compressed together; during the fourth stage of pedal movement, the first spring, the second spring, the third spring and the second rubber are compressed together, making the foot feel smoother and improving driving comfort.
[0026] (4) The third spring is limited and preloaded by cooperating with the second buckle and the second slot, so that the influence of the poor manufacturing precision of the third spring on the initial force can be reduced as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the present invention.
[0028] Figure 2 It is a schematic diagram of the explosion structure of the present invention.
[0029] Figure 3 for Figure 1 Top view of the .
[0030] Figure 4 for Figure 3 Schematic diagram of the AA section.
[0031] Figure 5 for Figure 3 Schematic diagram of the BB section.
[0032] Figure 6 It is a schematic diagram of the lower shell of the present invention.
[0033] Figure 7 It is a schematic diagram of the upper shell of the present invention.
[0034] Figure 8 It is a schematic diagram of the spring support block and the second rubber of the present invention.
[0035] Figure 9 It is a schematic diagram of the second rubber of the present invention.
[0036] Figure 10 It is a schematic diagram of the pedal force and displacement curve of the present invention.
[0037] Wherein: 1. Upper housing; 101. First card slot; 102. Second card slot; 2. Lower housing; 201. First buckle; 3. First spring; 4. Second spring; 5. Third spring; 6. Spring support block; 601. Second buckle; 7. O-ring; 8. Plunger; 9. Friction block; 10. Friction block bracket; 11. First rubber; 12. Second rubber. Detailed implementation manners
[0038] The following combines with the attached drawings to illustrate the detailed implementation manners of the present invention.
[0039] As Figures 1 - 10 shown, a force simulator device includes an upper housing 1 and a lower housing 2. A first card slot 101 and a second card slot 102 are arranged inside the upper housing 1, and a first buckle 201 matching the first card slot 101 is arranged inside the lower housing 2. The upper housing 1 and the lower housing 2 are connected through the mutual cooperation of the first card slot 101 and the first buckle 201, which is convenient for the non-destructive disassembly and assembly of the upper housing 1 and the lower housing 2, facilitating disassembly and inspection and replacing parts.
[0040] A plunger 8 is arranged in the lower housing 2 and the upper housing 1. An O-ring 7 is sleeved outside the plunger 8, and a spring support block 6 is sleeved on the plunger 8. A groove is arranged at the bottom of the spring support block 6, and a first rubber 11 is arranged at the groove of the spring support block 6. The first rubber 11 extends towards the lower housing 2 side, and the bottom of the first rubber 11 exceeds the bottom of the spring support block 6. There is a gap between the bottom of the first rubber 11 and the top of the lower housing 2. The compression friction of the O-ring 7 increases the damping feeling.
[0041] A third spring 5 is sleeved on the plunger 8, and the third spring 5 is arranged above the spring support block 6. A second rubber 12 is arranged outside the third spring 5 at the inner top of the upper housing 1, and the second rubber 12 extends downwards.
[0042] A friction block bracket 10 is arranged inside the lower housing 2, and friction blocks 9 are arranged in the grooves on both sides of the friction block bracket 10. A first spring 3 and a second spring 4 are arranged between the inner bottom of the lower housing 2 and the friction block bracket 10. One end of the first spring 3 contacts the inner bottom of the lower housing 2, and the other end of the first spring 3 contacts the bottom of the friction block bracket 10. One end of the second spring 4 contacts the inner bottom of the lower housing 2, and the other end of the second spring 4 contacts the bottom of the friction block bracket 10.
[0043] In one embodiment, the first spring 3 is arranged inside the second spring 4.
[0044] In one embodiment, grooves corresponding to the first spring 3 and the second spring 4 are arranged at both the inner bottom of the lower housing 2 and the bottom of the friction block bracket 10.
[0045] The spring support block 6 is provided with a second buckle 601, and the second buckle 601 cooperates with the second card slot 102 of the upper housing 1 for limiting. The third spring 5 is limited and pre-compressed through the cooperation of the second buckle 601 and the second card slot 102. The stiffness of the third spring 5 is very large, and manufacturing precision problems in actual mass production will bring great force value changes. However, the initial forces of the first spring 3 and the second spring 4 are relatively small compared to the initial force of the third spring 5. Adding the limit of the second buckle 601 and the second card slot 102 will not affect the initial force due to the poor manufacturing precision of the third spring 5. Since the initial force of braking is usually only about 15N, the force value is not large and is relatively sensitive to the driver's foot feeling. At the same time, the initial braking is used very frequently in actual driving, so the vehicle manufacturer has very high requirements for the initial force of the brake pedal. Since adding this limit is very crucial for the stability of the initial force, the control of the spring force value will become easier during product mass production, and the consistency of the force value is also relatively good.
[0046] After the third spring 5 is limited and pre-compressed through the cooperation of the second buckle 601 and the second card slot 102, there is a gap between the bottom of the second rubber 12 and the top of the spring support block 6.
[0047] During the pedal stepping process, the full stroke is divided into four sections of movement. When the pedal moves in the first section, the first spring 3 and the second spring 4 compress and move; when the pedal moves in the second section, the first spring 3, the second spring 4 and the first rubber 11 compress and move together; when the pedal moves in the third section, the first spring 3, the second spring 4 and the third spring 5 compress and move together; when the pedal moves in the fourth section, the first spring 3, the second spring 4, the third spring 5 and the second rubber 12 compress and move together. There is a compression connection of the first rubber 11 between the first section of movement and the second section of movement, so that there is no virtual position when the actual pedal steps on this position section, and the connection is relatively smooth, forming a very smooth foot feeling. At the same time, the NVH performance is also improved. During the fourth section of movement, the first spring 3, the second spring 4, the third spring 5 and the second rubber 12 compress and move together, aiming to generate a large damping feeling at the end. When the driver suddenly steps on the ABS brake, they cannot directly step on the hard limit, which will make the driver's foot very uncomfortable. Through the invented design, a very large damping feeling can be obtained at the end.
[0048] Figure 10 It is the pedal force design curve, which is split into four sections of design to make the foot feeling smoother and improve driving comfort.
[0049] The spring support block 6 wraps the first rubber 11. When connecting the compression between the first section and the second section, it can improve the NVH effect during the compression of the simulator, reduce noise, and also make the forces before and after the two sections better connected when compressed through the first rubber 11, and there is no step feeling between the front and rear forces during the stepping process, which is smooth.
[0050] When stepping on the pedal, the lower housing 2 moves upward, causing the friction block 9 and the lower housing 2 to generate damping through friction. By varying the force during the full stroke of the pedal and the materials of the two friction parts, different damping sensations can be produced to meet the needs of different customers. This damping sensation is one of the important factors enhancing the foot feeling of the driver when stepping on the pedal.
[0051] When the force simulator device is compressed to the end, it can generate a high damping sensation, avoiding the hard limit at the end of the stroke. Thus, when the driver instantly steps on the end point of the stroke, there is a sufficient damping sensation, enhancing the driving comfort. It can achieve the same end limit effect as a traditional mechanical pedal relying on a brake master cylinder.
[0052] A first rubber 11 is added to the bottom of the spring support block 6, and the first rubber 11 extends downward, enabling better force value connection among the first spring 3, the second spring 4, and the third spring 5. This makes the pedal force curve very smooth, without obvious abruptness and step feeling during the stepping foot feeling, and the full stroke is very smooth. At the same time, it also solves the NVH problem of rapid impact during the movement from the first stage to the second stage. By designing the first rubber 11, the non-linear force value generated by the first rubber 11, plus the force values of the first spring 3 and the second spring 4 when contacting the first rubber 11 during the first-stage movement, are just connected to the force value of the third spring 5 without obvious force value mutation. Therefore, a smooth arc-shaped test curve is formed, the curve has no bulge, generating a smooth driving foot feeling and enhancing driving comfort.
[0053] The first spring 3 and the second spring 4 are arranged in the lower housing 2, providing a redundant design. Even if one of the first spring 3 and the second spring 4 is damaged, the other spring can still work without affecting the normal use of the full-stroke force output of the pedal. Due to the daily driving conditions, the use frequency of the stroke in the middle and front-end positions when braking is very high, so adding a redundant design in the middle and front-end positions is very important.
[0054] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims, and within the protection scope of the present invention, any form of modification can be made.
Claims
1. A force simulator device, characterized in that: include: Upper housing (1); A lower housing (2) detachably connected to the upper housing (1); Wherein, a plunger (8) is arranged in the upper shell (1) and the lower shell (2), a friction block bracket (10) is arranged below the plunger (8) in the upper shell (1) and the lower shell (2), a friction block (9) is arranged on the friction block bracket (10), and a first spring (3) and a second spring (4) are arranged between the inner bottom of the lower shell (2) and the friction block bracket (10); A spring support block (6) is provided inside the upper shell (1) and the lower shell (2) and is sleeved on the plunger (8); a first rubber (11) is provided at the bottom of the spring support block (6), and the first rubber (11) extends downward; a third spring (5) is provided above the spring support block (6), and the third spring (5) is sleeved on the outside of the plunger (8); and a second rubber (12) is provided on the upper shell (1) and is sleeved on the outside of the third spring (5), and the second rubber (12) extends downward.
2. A force simulator device as claimed in claim 1, characterized in that: The upper shell (1) is provided with a first card slot (101), and the lower shell (2) is provided with a first card buckle (201) matching the first card slot (101); the upper shell (1) and the lower shell (2) are connected through the mutual cooperation between the first card slot (101) and the first card buckle (201).
3. A force simulator device as claimed in claim 1, characterized in that: The plunger (8) is outer-coated with an O-ring (7).
4. A force simulator device as claimed in claim 2, characterized in that: The upper shell (1) is provided with a second slot (102), and the spring support block (6) is provided with a second buckle (601), and the third spring (5) is limited and pre-compressed by the cooperation of the second buckle (601) and the second slot (102).
5. A force simulator device as claimed in claim 4, characterized in that: There is a gap between the bottom of the second rubber (12) and the top of the spring support block (6).
6. A force simulator device as claimed in claim 5, characterized in that: There is a gap between the bottom of the first rubber (11) and the top of the lower shell (2).
7. A force simulator device as claimed in claim 1, characterized in that: The inner bottom of the lower shell (2) and the bottom of the friction block bracket (10) are both provided with grooves corresponding to the first spring (3) and the second spring (4).
8. A force simulator device as claimed in claim 7, characterized in that: The first spring (3) is arranged on the inner side of the second spring (4).