Shock absorption and noise reduction structure of pedal simulator

Abstract

The utility model discloses a shock absorption and noise reduction structure of a pedal simulator, which comprises an upper cover and a lower cover which are connected in an up-down sliding manner, and a bulge is arranged in the upper cover. The plug body assembly is arranged in a containing cavity formed by the upper cover and the lower cover and can move along the shaft, and the friction block is installed on the plug body assembly and abuts against the position between the inner side wall of the upper cover and the plug body assembly. The elastic assembly comprises a first elastic part and a second elastic part which are arranged on the upper side and the lower side of the plug body assembly respectively. During braking, the lower cover moves downwards, and the protrusions abut against the plug body assembly to absorb shock and reduce noise. A buffering gasket is arranged in the plug body assembly, and a buffering part is pressed into the plug column in an interference mode through a T-shaped rubber part or integrally formed with the plug column in an injection mode. According to the structure, impact noise generated by direct contact of the upper cover and the piston during rapid treading is effectively reduced, the driving comfort is improved, rigid collision of parts is reduced, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drive -by -wire brake system, concretely relates to a pedal simulator shock absorption and noise reduction structure. BACKGROUND

[0002] The drive -by -wire brake pedal simulator is a key component of the drive -by -wire brake system (EMB), which converts the driver's stepping force into an electric signal through a sensor to drive the brake actuator. The traditional simulator is prone to generate a large impact noise in the fast stepping process due to the direct contact between the upper cover and the piston, which affects the driving experience. Although the existing technology improves the pedal feeling through the elastic component, it does not optimize the noise problem, resulting in user complaints.

[0003] The existing drive -by -wire brake pedal simulator (as described in Chinese patent No. CN221698696U) realizes the feedback during braking through the upper and lower covers connected by sliding, the piston, the elastic component and the hysteresis component arranged between the upper and lower covers. However, in the process of fast stepping, the contact between the upper cover and the piston inside the simulator may generate a large vibration and noise, affecting the user experience.

[0004] Therefore, it is necessary to propose a new structure to solve the above problems and improve the user's driving comfort experience. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above shortcomings, and the utility model aims at providing a pedal simulator shock absorption and noise reduction structure, which sets a buffer component and an elastic component between the upper cover and the plug body assembly, effectively reducing the impact noise generated by the direct contact between the upper cover and the piston in the fast stepping process, and improving the driving comfort experience.

[0006] The utility model provides a kind of pedal simulator shock-absorbing and noise reduction structure including upper cover, lower cover, the upper cover is inserted in lower cover, and upper cover is connected along the inner wall of lower cover up and down sliding, the upper cover is formed protrusion from top center and extends downward;Plug body assembly, a group of friction blocks, the plug body assembly is located in the cavity formed by upper cover and lower cover, the plug body assembly is coaxially arranged with upper cover and lower cover, and it can be moved up and down along shaft, the friction block is installed on plug body assembly, and it is in contact between the inner wall of upper cover and plug body assembly;Elastic component, the elastic component includes first elastic component, second elastic component, the first elastic component is in contact between plug body assembly upper side and upper cover inner top, and the second elastic component is in contact between plug body assembly lower side and lower cover inner bottom;Buffer component, the buffer component is located on plug body assembly, when braking, the lower cover moves downward, the protrusion is in contact with the plug body assembly, for shock-absorbing and noise reduction.The buffer component and elastic component between upper cover and plug body assembly avoid the impact noise generated by direct contact between upper cover and piston (plug body assembly) in the process of fast treading, to reduce the noise level when pedal simulator works.Upper cover is connected along the inner wall of lower cover up and down sliding, plug body assembly is located in the cavity formed by upper cover and lower cover and can be moved up and down along shaft, this structure design makes that pedal simulator can be adjusted according to different treading operation during working process, to simulate real pedal operation experience, a group of friction blocks are installed on plug body assembly, and it is in contact between the inner wall of upper cover and plug body assembly, can increase the friction between them, so that pedal simulator is more stable during operation.

[0007] Further, the pedal simulator damping noise reduction structure in the application, the plug body assembly includes a piston, a piston cover, a buffer washer, the piston is arranged in the piston cover, the buffer washer is in contact between the piston and the piston cover, the piston includes a plug column and a ring body extending around the plug column, the piston cover is provided with an opening upward, the plug column extends out of the opening, the buffer washer is sleeved on the plug column and in contact between the ring body and the inner top of the piston cover, the first elastic component is in contact between the outer top of the piston cover and the inner top of the upper cover, the second elastic component is in contact between the lower side of the ring body and the inner bottom of the lower cover, a group of notches are arranged on the outer side of the piston cover, and the friction block is clamped in the notch. The buffer washer is arranged between the piston and the piston cover, and when the two relative movements occur, the buffer washer can absorb impact energy, further enhancing the buffering effect of the whole plug body assembly. The piston is arranged in the piston cover, the plug column extends out of the upward opening of the piston cover, this design ensures that the piston can move up and down stably in the piston cover, and the cooperation of the ring body and the opening plays a positioning role, so that the movement direction of the piston is accurate. The buffer washer is sleeved on the plug column and in contact between the ring body and the inner top of the piston cover, which also plays a dual role of limiting and buffering for the piston movement. A group of notches are arranged on the outer side of the piston cover for clamping the friction block, and by selecting friction blocks of different materials and sizes, the friction between the plug body assembly and the inner side wall of the upper cover can be flexibly adjusted to meet the needs of different pedal operation feelings.

[0008] Further, the pedal simulator damping noise reduction structure in the application, the plug column is provided with a through hole in the central axis, and the top is provided with a transverse groove intersecting with the through hole, the buffer component is a T-shaped rubber piece, the bottom is in the form of a buckle, is pressed into the through hole with interference, and the top is embedded in the transverse groove. The buffer component adopts a T-shaped rubber piece, which has good elasticity and buffering performance. The T-shaped structure enables the rubber piece to be stably arranged in the through hole and the transverse groove of the plug column. When the pedal is subjected to a stepping force, the lower cover moves downward, and the protrusion is in contact with the plug body assembly, the rubber piece can effectively buffer the impact force, further improving the damping and noise reduction effect, reducing the vibration and noise generated by the rigid collision between components, and the plug column is provided with a through hole in the central axis and a transverse groove at the top, the bottom of the T-shaped rubber piece is in the form of a buckle and is pressed into the through hole with interference, and the top is embedded in the transverse groove. This unique installation method enables the buffer component to be firmly fixed on the plug column, ensuring that the buffer component will not easily loosen or fall off during frequent operation of the pedal simulator, always maintaining the effectiveness of its buffering function, and also ensuring the accurate relative position between components and maintaining the stability of the overall structure.

[0009] Further, the shock-absorbing and noise-reducing structure of the pedal simulator in the application, the buffer component is a rubber part integrally injection molded with the plug column. The buffer component is integrally injection molded with the plug column, forming an indivisible whole between them without assembly gap. During the working process of the pedal simulator, when the plug body assembly is subjected to external force, the buffer component can move synchronously with the plug column, effectively transmitting and buffering the impact force, ensuring the stable play of the shock-absorbing and noise-reducing function.

[0010] Further, the shock-absorbing and noise-reducing structure of the pedal simulator in the application, the upper cover is internally provided with a positioning ring, a first ring groove is formed between the positioning ring and the protrusion, the outer top of the piston cover is provided with an annular boss, a second ring groove is formed between the annular boss and the plug column extending out of the opening, the first elastic component includes a first-stage inner spring and a first-stage outer spring, the upper and lower ends of the first-stage inner spring are respectively sleeved on the plug column of the protrusion and the upper part of the ring body, and are simultaneously clamped into the first ring groove and the second ring groove, and the upper and lower ends of the first-stage outer spring are respectively sleeved in the second ring groove and outside the second ring groove. The two ring grooves play the role of accurate positioning. The first elastic component adopts the combined form of the first-stage inner spring and the first-stage outer spring. Different springs will produce different degrees of deformation according to their own elastic coefficients when subjected to force, thereby realizing multi-stage elastic buffering.

[0011] Further, the shock-absorbing and noise-reducing structure of the pedal simulator in the application, the lower cover is internally provided with a second protrusion at the center of the bottom, the second elastic component includes a second-stage inner spring and a second-stage outer spring, the upper and lower ends of the second-stage inner spring are respectively sleeved on the plug column of the lower part of the ring body and the second protrusion, and the second-stage outer spring is sleeved outside the second-stage inner spring. The two ends of the second-stage inner spring are respectively sleeved on the plug column of the lower part of the ring body and the second protrusion, playing the role of positioning and guiding. It ensures that the plug body assembly can move in the correct direction during the up-and-down movement, avoiding deviation or shaking.

[0012] Further, the shock-absorbing and noise-reducing structure of the pedal simulator in the application, the lower cover is internally provided with a rubber spring corresponding to the upper cover. When braking, the upper cover moves down to the bottom of the lower cover and first collides with the rubber spring. The rubber spring provides a final buffer defense line when the upper cover moves down to the bottom of the lower cover during braking. After other shock-absorbing components (such as elastic components) have played a certain buffering role, the rubber spring can further absorb the remaining impact force, preventing the upper cover from colliding with the bottom of the lower cover, protecting the internal structure of the pedal simulator from damage, and the rubber spring can limit the stroke of the upper cover of the pedal simulator. When the upper cover moves down to contact the rubber spring, the compression deformation of the rubber spring will gradually increase with the continuous downward movement of the upper cover, generating a certain resistance, prompting the driver that the limit position of the pedal stroke has been reached, avoiding component damage or affecting the normal work of the pedal simulator due to excessive pedaling.

[0013] Furthermore, in the vibration damping and noise reduction structure of the pedal simulator in this application, the second protrusion is provided with an open circular groove along its axial direction. The open circular groove corresponds to the through hole and is used for venting. During the operation of the pedal simulator, especially when the plug assembly moves up and down, the gas pressure in the internal space changes. The open circular groove, corresponding to the through hole, provides a venting channel for the gas, allowing excess gas generated by the movement of the components to be smoothly discharged, avoiding additional pressure or resistance due to gas accumulation, and ensuring the smooth operation of the pedal simulator.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] 1. The vibration damping and noise reduction structure for a pedal simulator described in this utility model incorporates a buffer component between the upper cover and the piston assembly. This buffer component is constructed using a T-shaped rubber part that is press-fitted in or integrally injection-molded with the piston, ensuring it is firmly fixed to the piston and preventing it from easily loosening or falling off during frequent operation of the pedal simulator. Furthermore, the piston assembly incorporates multiple buffering structures, including buffer washers, effectively reducing the impact noise generated by direct contact between the upper cover and the piston during rapid pedaling, significantly improving driving comfort. Simultaneously, the multiple buffering structures reduce rigid collisions between components, extending the lifespan of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a shock absorption and noise reduction structure for a pedal simulator according to the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of a half-section structure;

[0018] Figure 3 for Figure 1 An explosion diagram.

[0019] Explanation of reference numerals in the instruction manual:

[0020] 1-Top cover, 11-Protrusion, 12-Positioning ring, 13-First annular groove;

[0021] 2-Lower cover, 21-Second protrusion, 211-Open circular groove;

[0022] 3-Plug assembly, 31-Piston, 311-Plug post, 3111-Through hole, 3112-Transverse groove, 312-Ring body, 32-Piston cover, 321-Opening, 322-Notch, 323-Annular boss, 324-Second annular groove, 33-Buffer washer;

[0023] 4-Friction block;

[0024] 5-elastic assembly, 51-first elastic component, 511-first level inner spring, 512-first level outer spring, 52-second elastic component, 521-second level inner spring, 522-second level outer spring;

[0025] 6-buffer component;

[0026] 7-rubber spring. DETAILED DESCRIPTION

[0027] The utility model is further illustrated below in combination with the drawings and specific embodiments.

[0028] Embodiment 1

[0029] The embodiment provides a pedal simulator damping and noise reduction structure, as shown in the drawings. Figures 1-3 The structure comprises:

[0030] Upper cover 1, lower cover 2, plug body assembly 3, friction block 4, elastic assembly 5 and buffer component 6.

[0031] Upper cover 1 and lower cover 2: the upper cover 1 is inserted into the lower cover 2 and is connected in sliding connection up and down along the inner wall of the lower cover 2. A protrusion 11 is formed in the upper cover 1 from the top center downward, which is used to contact the plug body assembly 3 during braking and plays a role of damping and noise reduction.

[0032] Plug body assembly 3: the plug body assembly 3 is arranged in the cavity formed by the upper cover 1 and the lower cover 2, coaxially with the upper cover 1 and the lower cover 2, and can move up and down along the shaft. The plug body assembly 3 comprises a piston 31, a piston cover 32 and a buffer washer 33. The piston 31 is arranged in the piston cover 32, and the buffer washer 33 is in contact between the piston 31 and the piston cover 32, playing a buffering role.

[0033] Friction block 4: the friction block 4 is installed on the plug body assembly 3 and is in contact between the inner side wall of the upper cover 1 and the plug body assembly 3, increasing the friction between the two, so that the pedal simulator is more stable during operation.

[0034] Elastic assembly 5: the elastic assembly 5 comprises a first elastic component 51 and a second elastic component 52. The first elastic component 51 is in contact between the upper side of the plug body assembly 3 and the inner top of the upper cover 1, and the second elastic component 52 is in contact between the lower side of the plug body assembly 3 and the inner bottom of the lower cover 2. The first elastic component 51 comprises a first level inner spring 511 and a first level outer spring 512, and the second elastic component 52 comprises a second level inner spring 521 and a second level outer spring 522, so that multi-stage elastic buffering is realized through the combination of the multi-stage springs.

[0035] Buffering component 6: The buffering component 6 is arranged on the plug assembly 3 to reduce shock and noise during braking. The buffering component 6 is a T-shaped rubber piece with a snap-like bottom that is press-fitted into the through hole 3111 of the plug column 311, and the top is embedded in the horizontal groove 3112. Alternatively, the buffering component 6 is a rubber piece integrally injection molded with the plug column 311. The T-shaped rubber piece has good elasticity and buffering performance, which can effectively buffer the impact force and reduce the vibration and noise caused by the rigid collision between components.

[0036] Rubber spring 7: The inner bottom of the lower cover 2 is provided with a rubber spring 7 corresponding to the upper cover 1. During braking, the upper cover 1 moves downward to the bottom of the lower cover 2, first contacts the rubber spring 7, provides the final buffer defense line, and prevents the upper cover 1 from colliding with the inner bottom of the lower cover 2.

[0037] Assembly process:

[0038] First, prepare all the parts, including the upper cover 1, the lower cover 2, the plug assembly 3, a set of friction blocks 4, the elastic assembly 5, the buffering component 6, and the rubber spring 7. When assembling the plug assembly 3, first, the buffering washer 33 is sleeved on the plug column 311 of the piston 31, then the piston 31 is placed in the piston cover 32, and the buffering washer 33 is in contact between the ring body 312 of the piston 31 and the inner top of the piston cover 32. A set of friction blocks 4 is clamped into the notch 322 on the outer side of the piston cover 32.

[0039] When installing the elastic assembly 5, the upper and lower ends of the first-stage inner spring 511 of the first elastic component 51 are sleeved on the plug column 311 of the protrusion 11 and the upper part of the ring body 312, respectively, and are clamped into the first ring groove 13 formed by the protrusion 11 and the upper positioning ring 12 of the upper cover 1, and the second ring groove 324 formed by the plug column 311 and the outer top annular boss 323 of the piston cover 32, and then the upper and lower ends of the first-stage outer spring 512 are sleeved outside the first ring groove 13 and the second ring groove 324, respectively; the upper and lower ends of the second-stage inner spring 521 of the second elastic component 52 are sleeved on the plug column 311 of the lower part of the ring body 312 and the second protrusion 21 on the inner bottom center of the lower cover 2, respectively, and the second-stage outer spring 522 is sleeved outside the second-stage inner spring 521.

[0040] If the buffering component 6 is a T-shaped rubber piece, the snap-like bottom part of the buffering component 6 is press-fitted into the through hole 3111 of the plug column 311, and the top is embedded in the horizontal groove 3112 of the plug column 311; if the buffering component 6 is integrally injection molded with the plug column 311, this installation step is not required. Finally, the rubber spring 7 is placed on the inner bottom of the lower cover 2, and the plug assembly 3 and the elastic assembly 5 are placed in the lower cover 2 as a whole, and the upper cover 1 is inserted into the lower cover 2 and connected by sliding up and down along the inner wall of the lower cover 2, completing the assembly of the pedal simulator.

[0041] The above examples are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that the personnel familiar with this field can understand the content of the utility model and implement it accordingly, and the protection scope of the utility model cannot be limited thereby. Any equivalent change or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A pedal simulator shock absorption and noise reduction structure, characterized in that it comprises: an upper cover (1) and a lower cover (2), the upper cover (1) being inserted into the lower cover (2) and being connected to the lower cover (2) in a sliding manner along the inner wall of the lower cover (2), and a protrusion (11) being formed in the upper cover (1) and extending downward from the center of the top of the upper cover (1); a plug assembly (3) and a set of friction blocks (4), the plug assembly (3) being arranged in a cavity formed by the upper cover (1) and the lower cover (2), the plug assembly (3) being coaxially arranged with the upper cover (1) and the lower cover (2) and being movable along the axis, and the friction blocks (4) being installed on the plug assembly (3) and abutting between the inner wall of the upper cover (1) and the plug assembly (3); an elastic assembly (5) comprising a first elastic component (51) and a second elastic component (52), the first elastic component (51) abutting between the upper side of the plug assembly (3) and the inner top of the upper cover (1), and the second elastic component (52) abutting between the lower side of the plug assembly (3) and the inner bottom of the lower cover (2); and a buffer component (6) arranged on the plug assembly (3), when braking, the lower cover (2) moves downward, the protrusion (11) abuts against the plug assembly (3), and the buffer component (6) is used for shock absorption and noise reduction.

2. The pedal simulator shock absorption and noise reduction structure according to claim 1, characterized in that the plug assembly (3) comprises a piston (31), a piston cover (32) and a buffer washer (33), the piston (31) being arranged in the piston cover (32), the buffer washer (33) abutting between the piston (31) and the piston cover (32), the piston (31) comprising a plug column (311) and a ring body (312) extending around the plug column (311), the piston cover (32) being provided with an opening (321) upward, the plug column (311) extending out of the opening, the buffer washer (33) being sleeved on the plug column (311) and abutting between the ring body (312) and the inner top of the piston cover (32), the first elastic component (51) abutting between the outer top of the piston cover (32) and the inner top of the upper cover (1), the second elastic component (52) abutting between the lower side of the ring body (312) and the inner bottom of the lower cover (2), and the outer side of the piston cover (32) being provided with a set of notches (322), the friction blocks (4) being clamped in the notches (322).

3. The pedal simulator shock absorption and noise reduction structure according to claim 2, characterized in that the plug column (311) is provided with a through hole (3111) in the center axis, and the top of the plug column (311) is provided with a transverse groove (3112) intersecting with the through hole (3111), and the buffer component (6) is a T-shaped rubber piece, the bottom of the buffer component (6) is in the form of a buckle, the buffer component (6) is pressed into the through hole (3111) in an interference fit, and the top of the buffer component (6) is embedded in the transverse groove (3112).

4. The pedal simulator shock absorption and noise reduction structure according to claim 2, characterized in that the buffer component (6) is a rubber piece integrally injection molded with the plug column (311). ​ ​ ​ ​ ​ ​ ​ ​ 5. The pedal simulator shock absorption and noise reduction structure according to claim 3 or 4, characterized in that: the upper cover (1) is provided with a positioning ring (12) on the top, a first ring groove (13) is formed between the positioning ring (12) and the protrusion (11), the piston cover (32) is provided with an annular boss (323) on the top, a second ring groove (324) is formed between the annular boss (323) and the plug column (311) extending from the opening (321), the first elastic component (51) comprises a first inner spring (511) and a first outer spring (512), the upper and lower ends of the first inner spring (511) are sleeved on the protrusion (11) and the plug column (311) on the upper part of the ring body (312) respectively, and are clamped into the first ring groove (13) and the second ring groove (324) respectively, and the upper and lower ends of the first outer spring (512) are sleeved outside the first ring groove (13) and the second ring groove (324) respectively.

6. The pedal simulator shock absorption and noise reduction structure according to claim 3 or 4, characterized in that: the lower cover (2) is provided with a second protrusion (21) on the bottom, the second elastic component (52) comprises a second inner spring (521) and a second outer spring (522), the upper and lower ends of the second inner spring (521) are sleeved on the plug column (311) on the lower part of the ring body (312) and the second protrusion (21) respectively, and the second outer spring (522) is sleeved outside the second inner spring (521).

7. The pedal simulator shock absorption and noise reduction structure according to any one of claims 1-4, characterized in that: the lower cover (2) is provided with a rubber spring (7) on the bottom, the rubber spring (7) corresponds to the upper cover (1), when the upper cover (1) moves down to the bottom of the lower cover during braking, the rubber spring (7) is first contacted.

8. The pedal simulator shock absorption and noise reduction structure according to claim 6, characterized in that: the second protrusion (21) is provided with an open circular groove (211) in the axial direction, the open circular groove (211) corresponds to the through hole (3111) for exhaust.

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