A pedal simulator

Abstract

The application discloses a pedal simulator, which comprises an adjusting fork, a push rod, a push rod base, a spring base, a connecting base, a mounting base, a small spring and a large spring, one end of the push rod is connected with the adjusting fork, the other end of the push rod is connected with one end of the push rod base, the other end of the push rod base passes through the mounting base and can axially move relative to the mounting base, the spring base is fixed at one end of the push rod, the connecting base is fixed on the outer periphery of the push rod, the small spring is sleeved on the outside of the push rod, a part of the small spring is located in the inside of the connecting base, one end of the small spring abuts against the spring base, the other end of the small spring abuts against the connecting base, the diameter of the small spring gradually decreases from one end abutting against the connecting base to the other end abutting against the spring base, the large spring is sleeved on the outside of the connecting base, one end of the large spring abuts against the connecting base, the other end of the large spring abuts against the mounting base, and the diameter of the large spring is constant. The pedal simulator provided by the application is not only comfortable, light, noiseless, simple in structure and low in cost.

Description

Technical Field

[0001] This invention relates to the field of automotive braking systems, specifically a pedal simulator. Background Technology

[0002] With the increasing popularity of new energy vehicles, the demand for decoupled brake boosters is growing, leading to higher requirements for pedal feel simulators. Currently, brake boosters mainly operate on two principles: one relies on springs to simulate pedal feel, using springs of varying stiffness to mimic different pedal sensations. This approach is simple and low-cost, but the spring stiffness is highly linear, resulting in a poor subjective driving experience, and the springs have no limit, leading to significant vibration noise. To address this issue, hydraulic pedal feel simulators have emerged. These simulators work by using a push rod to drive a piston, generating pressure that is transmitted to the load chamber. The damping effect of the hydraulic system is then used to simulate pedal feel. However, hydraulic pedal feel simulators are complex, expensive, and pose a risk of fluid leakage. Therefore, there is an urgent need for a pedal feel simulator that simultaneously offers comfortable pedal feel, low noise, and low cost. Summary of the Invention

[0003] In view of this, the present invention provides a pedal simulator that is not only comfortable and lightweight with low noise, but also simple in structure and low in cost.

[0004] This invention provides a pedal simulator, comprising an adjusting fork, a push rod, a push rod seat, a spring seat, a connecting seat, a mounting seat, a small spring, and a large spring. One end of the push rod is connected to the adjusting fork, and the other end of the push rod is connected to one end of the push rod seat. The other end of the push rod seat passes through the mounting seat and is axially movable relative to the mounting seat. The spring seat is fixed to one end of the push rod, and the connecting seat is fixed to the outer periphery of the push rod. The small spring is sleeved on the outside of the push rod, and a portion of the small spring is located inside the connecting seat, with one end abutting against the spring seat and the other end abutting against the connecting seat. The diameter of the small spring gradually decreases from the end abutting against the connecting seat to the end abutting against the spring seat. The large spring is sleeved on the outside of the connecting seat, with one end abutting against the connecting seat and the other end abutting against the mounting seat. The diameter of the large spring remains constant.

[0005] Furthermore, the connecting seat has an extension at one end near the spring seat and a fixing part at one end away from the spring seat. The extension extends radially outward from the end of the connecting seat near the spring seat, and the fixing part extends radially inward from the end of the connecting seat away from the spring seat. The connecting seat is fixed to the outer periphery of the push rod by sleeve connection between the push rod and the fixing part.

[0006] Furthermore, one end of the small spring abuts against the spring seat, the other end of the small spring abuts against the fixing part, one end of the large spring abuts against the extension part, and the other end of the large spring abuts against the mounting base.

[0007] Furthermore, the connecting seat is a combination of rubber and metal materials, the fixing part is made of metal, and the connecting seat is made of rubber except for the fixing part.

[0008] Furthermore, the mounting base includes a first mounting base and a second mounting base. The first mounting base is perpendicular to the second mounting base. A buffer seat is fixed on the second mounting base. The buffer seat is sleeved on the outer periphery of the connection between the first mounting base and the second mounting base. One end of the large spring abuts against the connecting base, and the other end of the large spring abuts against the buffer seat.

[0009] Furthermore, the first mounting base is hollow inside, and a groove is provided between the inner wall and the outer wall of the first mounting base, the groove being inserted into the shock absorber.

[0010] Furthermore, the shock absorber includes a first shock absorber and a second shock absorber. The first shock absorber is hollow inside, and the second shock absorber extends radially outward from one end of the first shock absorber near the connecting seat. The first shock absorber is inserted into the groove, and the second shock absorber is located outside the groove and rests on the large spring.

[0011] Furthermore, protrusions are provided at intervals along the outer periphery of the first shock absorber, and the protrusions abut against the inner wall of the groove. Notches are provided at intervals around the outer periphery of the second shock absorber, and the notches are used to protect the shock absorber.

[0012] Furthermore, a buffer sleeve is provided between the inner wall of the push rod seat and the mounting seat. The buffer sleeve is fitted around the outer periphery of the push rod seat and is made of wear-resistant material.

[0013] Furthermore, a limiting member is provided on the side of the second mounting base away from the first mounting base. The limiting member is sleeved on the outer periphery of the push rod base and is used to limit the push rod when it returns to its original position.

[0014] Compared with existing technologies, the present invention has the following beneficial technical effects:

[0015] This invention provides a pedal simulator with two elastic elements: a small spring and a large spring connected by a connecting seat. The small spring is a conical spring, while the large spring is a regular spring. The combined use of these two elastic elements can meet the requirements of variable stiffness pedal feel and achieve a smooth transition at the pedal force inflection point, preventing the inflection point from being too abrupt and making the pedal feel more realistic and comfortable. A buffer seat and shock absorber are provided on the mounting seat, both made of rubber for shock absorption and noise reduction. A buffer sleeve, made of wear-resistant material, is provided between the mounting seat and the push rod seat to meet different hysteresis force requirements. In summary, the pedal simulator provided by this invention is not only comfortable and lightweight with low noise, but also has a simple structure and low cost. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of a pedal simulator according to the present invention.

[0017] Figure 2 is a cross-sectional view of a pedal simulator according to the present invention.

[0018] Figure 3 is a schematic diagram of the mounting base in this invention.

[0019] Figure 4 is a schematic diagram of the connecting seat in this invention.

[0020] Figure 5 is a schematic diagram of the structure of the shock-absorbing rubber in this invention.

[0021] Wherein: 10-Adjusting fork; 20-Push rod; 30-Push rod seat; 40-Spring seat; 50-Connecting seat; 51-Extension; 52-Fixing part; 60-Mounting seat; 61-First mounting seat; 62-Second mounting seat; 63-Groove; 70-Small spring; 80-Large spring; 90-Shock absorber; 91-First shock absorber; 911-Protrusion; 92-Second shock absorber; 921-Notch; 100-Buffer seat; 110-Buffer sleeve; 120-Limiting part. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] In the description of this invention, it should be noted that the orientations or positional relationships indicated in this description are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Please refer to Figure 1-2The present invention provides a pedal simulator, comprising an adjusting fork 10, a push rod 20, a push rod seat 30, a spring seat 40, a connecting seat 50, a mounting seat 60, a small spring 70, and a large spring 80. One end of the push rod 20 is connected to the adjusting fork 10, and the other end of the push rod 20 is connected to one end of the push rod seat 30. The other end of the push rod seat 30 passes through the mounting seat 60 and is capable of axial movement relative to the mounting seat 60. The spring seat 40 is fixed to one end of the push rod 20, and the connecting seat 50 is fixed to the push rod seat 60. A small spring 70 is sleeved on the outer periphery of the push rod 20, with a portion of the small spring 70 located inside the connecting seat 50. One end of the small spring 70 abuts against the spring seat 40, and the other end abuts against the connecting seat 50. The diameter of the small spring 70 gradually decreases from the end abutting against the connecting seat 50 to the end abutting against the spring seat 40. A large spring 80 is sleeved on the outer periphery of the connecting seat 50, with one end abutting against the connecting seat 50 and the other end abutting against the mounting seat 60. The diameter of the large spring 80 remains unchanged. The pedal simulator provided by this invention is not only comfortable and lightweight with low noise, but also has a simple structure and low cost.

[0025] Furthermore, the adjusting fork 10 and the push rod 20 are threaded together, and the push rod 20 and the push rod seat 30 are riveted together. The push rod seat 30 is movably mounted to the mounting base 60, forming a transmission shaft for transmitting the driver's pedal force and providing space for axial movement. Specifically, when the driver presses the adjusting fork 10, the pedaling force is transmitted to the push rod 20 and the push rod seat 30 through the adjusting fork 10. Under the action of the pedaling force, the push rod seat 30 moves axially relative to the mounting base 60.

[0026] Please refer to Figure 1-2 and Figure 4 The connecting seat 50 is generally barrel-shaped, wider at the top and narrower at the bottom. An extension 51 is located at the end of the connecting seat 50 near the spring seat 40, and a fixing part 52 is located at the end of the connecting seat 50 away from the spring seat 40. The extension 51 extends radially outward from the end of the connecting seat 50 near the spring seat 40, and the fixing part 52 extends radially inward from the end of the connecting seat 50 away from the spring seat 40. The connecting seat 50 is fixed to the outer periphery of the push rod 20 by a sleeve connection between the connecting rod 20 and the fixing part 52. One end of the small spring 70 abuts against the spring seat 40, and the other end of the small spring 70 abuts against the fixing part 52. One end of the large spring 80 abuts against the extension 51, and the other end of the large spring 80 abuts against the mounting seat 60. The small spring 70 and the large spring 80 are connected in series through the connecting seat 50 to simulate pedal feel, meeting the requirements for variable stiffness pedal feel and making the pedal feel more realistic and comfortable.

[0027] Furthermore, the connecting seat 50 is a combination of rubber and metal, wherein the fixing part 52 is made of metal and is used to fix the small spring 70, and the other parts except the fixing part 52 are made of rubber for shock absorption and noise reduction.

[0028] Furthermore, the small spring 70 is a conical spring, and its diameter gradually decreases from the end that abuts against the fixed part 52 to the end that abuts against the spring seat 40. The large spring 80 is a regular spring with a constant diameter, and it is located outside the small spring 70. The conical small spring 70 and the regular large spring 80 work together to achieve a smooth transition at the inflection point of the pedal force, preventing the inflection point of the pedal force from being too abrupt.

[0029] Please refer to Figure 1-2 and Figure 3 The mounting base 60 includes a first mounting base 61 and a second mounting base 62. The first mounting base 61 is perpendicular to the second mounting base 62. A buffer seat 100 is fixed on the first mounting base 61. The buffer seat 100 is sleeved on the outer periphery of the connection between the first mounting base 61 and the second mounting base 62. One end of the large spring 80 abuts against the extension 51, and the other end of the large spring 80 abuts against the buffer seat 100 on the mounting base 60. Rubber is adhered to the buffer seat 100 for shock absorption and noise reduction.

[0030] Please refer to Figure 1-2 and Figure 5 The first mounting base 61 is a hollow cylinder. A groove 63 is provided between the inner wall and the outer wall of the first mounting base 61. The shock absorber 90 is inserted into the groove 63. The shock absorber 90 can be used to attenuate the amplitude of the large spring 80 when it vibrates and reduce the noise generated when the large spring 80 vibrates.

[0031] Furthermore, the shock absorber 90 is made of rubber and includes a first shock absorber 91 and a second shock absorber 92. The first shock absorber 91 is a hollow cylinder, and the second shock absorber 92 extends radially from the end of the first shock absorber 91 near the connecting seat 50 towards the outside of the shock absorber 90. The first shock absorber 91 is inserted into the groove 63, and the second shock absorber 92 is located outside the groove 63 and rests on the large spring 80. Protrusions 911 are provided at intervals along the outer periphery of the first shock absorber 91, and the protrusions 911 abut against the inner wall of the groove 63 to fix the shock absorber 90. Notches 921 are provided at intervals around the outer periphery of the second shock absorber 92. The notches 921 are provided to protect the shock absorber 90 and prevent the second shock absorber 92 from being repeatedly bent and crushed.

[0032] Please refer to Figure 2A buffer sleeve 110 is also provided between the inner wall of the push rod seat 30 and the mounting seat 60. The buffer sleeve 110 is fitted around the outer periphery of the push rod seat 30 and fixed to the inner wall of the mounting seat 60. The buffer sleeve 110 is made of wear-resistant material to improve service life. The friction between the buffer sleeve 110 and the surface of the push rod seat 30 is also part of the simulated pedal force. When the driver presses the pedal, the friction force and the pedal force are in opposite directions; when the driver releases the pedal, the friction force and the pedal force are in the same direction. In this way, the force when the pedal returns to its original position is smaller than when it is pressed. The smaller part is the hysteresis force, which can reduce the feeling of the pedal hitting the foot when returning to its original position. Different hysteresis force requirements can be met by changing the material and surface structure of the buffer sleeve 110.

[0033] Please refer to Figure 1-2 The second mounting base 62 has a limiting member 120 on the side away from the first mounting base 61. The limiting member 120 is sleeved on the outer periphery of the push rod seat 30. The push rod seat 30 and the limiting member 120 are riveted together. The limiting member 120 can be used to limit the push rod 20 when it returns to its original position.

[0034] As described above, the pedal simulator provided by this invention incorporates two elastic elements: a small spring 70 and a large spring 80 connected by a connecting seat. The small spring 70 is a conical spring, while the large spring 80 is a regular spring. The combined use of these two elastic elements satisfies the need for variable stiffness pedal feel and enables a smooth transition at the pedal force inflection point, preventing abrupt inflection points and resulting in a more realistic and comfortable pedal feel. A buffer seat 100 and a shock absorber 90 are provided on the mounting base 60, both made of rubber for vibration damping and noise reduction. A buffer sleeve 110, made of wear-resistant material, is placed between the mounting base 60 and the push rod seat 30 to meet different hysteresis force requirements. In summary, the pedal simulator provided by this invention is not only comfortable and lightweight with low noise, but also has a simple structure and low cost.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pedal simulator, characterized in that, The device includes an adjusting fork (10), a push rod (20), a push rod seat (30), a spring seat (40), a connecting seat (50), a mounting seat (60), a small spring (70), and a large spring (80). One end of the push rod (20) is connected to the adjusting fork (10), and the other end of the push rod (20) is connected to one end of the push rod seat (30). The other end of the push rod seat (30) passes through the mounting seat (60) and can move axially relative to the mounting seat (60). The spring seat (40) is fixed to one end of the push rod (20), and the connecting seat (50) is fixed to the outer periphery of the push rod (20). The small spring (70) is sleeved on the outside of the push rod (20), and a part of the small spring (70) is located inside the connecting seat (50). One end of the small spring (70) abuts against the spring seat (40), and the other end abuts against the connecting seat (50). The diameter of the small spring (70) gradually decreases from the end abutting against the connecting seat (50) to the end abutting against the spring seat (40). The large spring (80) is sleeved on the outside of the connecting seat (50). One end of the large spring (80) abuts against the connecting seat (50), and the other end abuts against the mounting seat (60). The diameter of the large spring (80) remains unchanged. The mounting base (60) includes a first mounting base (61) and a second mounting base (62). The first mounting base (61) is perpendicular to the second mounting base (62). The interior of the first mounting base (61) is hollow, and a groove (63) is provided between the inner wall and the outer wall of the first mounting base (61). The groove (63) is inserted into the shock absorber (90). The shock absorber (90) includes a first shock absorber (91) and a second shock absorber (92). The interior of the first shock absorber (91) is hollow, and the second shock absorber (92) extends from the first shock absorber (91) closer to the... One end of the connecting seat (50) extends radially outward from the shock absorber (90). The first shock absorber (91) is inserted into the groove (63), and the second shock absorber (92) is located outside the groove (63) and rests on the large spring (80). Protrusions (911) are provided at intervals along the outer periphery of the first shock absorber (91), and the protrusions (911) abut against the inner wall of the groove (63). Notches (921) are provided at intervals around the outer periphery of the second shock absorber (92), and the notches (921) are used to protect the shock absorber (90).

2. The pedal simulator as described in claim 1, characterized in that, The connecting seat (50) has an extension (51) at one end near the spring seat (40) and a fixing part (52) at one end away from the spring seat (40). The extension (51) extends radially outward from the end of the connecting seat (50) near the spring seat (40), and the fixing part (52) extends radially inward from the end of the connecting seat (50) away from the spring seat (40). The connecting seat (50) is fixed to the outer periphery of the push rod (20) by the sleeve connection between the push rod (20) and the fixing part (52).

3. The pedal simulator as described in claim 2, characterized in that, One end of the small spring (70) abuts against the spring seat (40), the other end of the small spring (70) abuts against the fixing part (52), one end of the large spring (80) abuts against the extension part (51), and the other end of the large spring (80) abuts against the mounting base (60).

4. The pedal simulator as described in claim 2, characterized in that, The connecting seat (50) is a combination of rubber and metal, the fixing part (52) is made of metal, and the connecting seat (50) is made of rubber except for the fixing part (52).

5. The pedal simulator as described in claim 1, characterized in that, A buffer seat (100) is fixed on the second mounting seat (62). The buffer seat (100) is sleeved on the outer periphery of the connection between the first mounting seat (61) and the second mounting seat (62). One end of the large spring (80) abuts against the connecting seat (50), and the other end of the large spring (80) abuts against the buffer seat (100).

6. The pedal simulator as described in claim 1, characterized in that, A buffer sleeve (110) is provided between the inner wall of the push rod seat (30) and the mounting seat (60). The buffer sleeve (110) is fitted on the outer periphery of the push rod seat (30) and is made of wear-resistant material.

7. The pedal simulator as described in claim 5, characterized in that, The second mounting base (62) has a limiting member (120) on the side away from the first mounting base (61). The limiting member (120) is sleeved on the outer periphery of the push rod seat (30) and is used to limit the push rod (20) when it returns to its original position.

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