Pedal feeling simulation device and vehicle

Abstract

The utility model provides a pedal feeling simulation device and a vehicle. The pedal feeling simulation device comprises a shell, a damping assembly and a push rod. The damping assembly comprises a plurality of damping components, each damping component comprises a piston and a damping part, the pistons are movably connected to the shell, the pistons in every two damping components are in transmission connection, the damping parts are connected to the pistons and the shell, and all the damping parts can be synchronously switched between an initial state and a damping state through movement of the corresponding pistons; the push rod abuts against a piston and can push the piston to move so that the damping piece can be switched from the initial state to the damping state, and the damping piece can apply damping force enabling the push rod to reset to the piston in the process of switching from the initial state to the damping state. The damping feeling generated by a driver is generated by superposing the damping force generated by the damping pieces in all the damping components, the pedal force is more stable, the damping feeling can be customized according to the requirements of different customers, the early-stage development cost is reduced, the later-stage maintenance and use cost is reduced, and pollution is completely eradicated.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle braking, and in particular relates to a pedal feel simulation device and a vehicle. Background Art

[0002] With the advancement of intelligent and automated driving in the automotive industry, automakers are increasingly conducting in-depth research on these technologies. Brake-by-wire systems, as a key technology for autonomous driving, have experienced rapid development within this context. Pedal feel simulators are a key component influencing the safety performance of braking systems.

[0003] Current brake-by-wire pedal feel simulators use a traditional hydraulic system, which regulates damping by controlling the flow of brake fluid. This type of hydraulic damping pedal feel simulator uses a two-hole one-way valve design to achieve a damping effect. When the pedal is pressed, both holes open simultaneously, reducing the flow of brake fluid to generate a certain pressure, thereby producing a pedal damping feel. When the pedal retracts, the brake fluid also retracts to generate a certain negative pressure, thereby ensuring a certain hysteresis in the pedal retraction. However, the method of generating a pressure differential by controlling the flow of brake fluid can easily lead to excessive pressure differentials when the pedal is pressed quickly, resulting in an unstable pedal feel. Furthermore, the brake fluid needs to be replaced regularly, resulting in high maintenance costs, and the discarded brake fluid also has a certain impact on the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a pedal feel simulation device and a vehicle, aiming to solve the technical problems of unstable pedal feel and high subsequent maintenance cost of the current pedal feel simulator.

[0005] The utility model is implemented as follows: in a first aspect, a pedal feel simulation device is provided, comprising a housing, a damping assembly and a push rod;

[0006] The damping assembly includes a plurality of damping members, each of which includes a piston and a damping member. The piston is movably connected to the housing. The pistons in every two damping members are drivingly connected. The damping member is connected to the piston and the housing. All the damping members can be synchronously switched between an initial state and a damping state by movement of the corresponding piston.

[0007] The push rod abuts against the piston and can switch the damping member from the starting state to the damping state by pushing the piston to move. The damping member can apply a damping force to the piston to reset the push rod during the switching process from the starting state to the damping state.

[0008] In some embodiments of the first aspect, a plurality of sliding tracks are provided on the housing, and each of the pistons is slidably connected to one of the sliding tracks.

[0009] In some embodiments of the first aspect, the damping assembly includes a plurality of transmission structures movably connected to the housing, and every two pistons are transmission-connected via the transmission structures.

[0010] In some embodiments of the first aspect, the transmission structure includes a transmission gear rotatably connected to the housing, a rack structure is provided on the side wall of the piston, the extension direction of the rack structure is the same as the movement direction of the piston, the transmission gear is engaged with the rack structures on both pistons, and the movement directions of the two transmission-connected pistons are parallel and opposite.

[0011] In some embodiments of the first aspect, the damping member includes an elastomer arranged between the piston and the housing. When the damping member switches from the starting state to the damping state, the elastomer is compressed and deformed, and the damping force is the elastic force generated by the elastomer due to the compression deformation.

[0012] In some embodiments of the first aspect, the damping member further includes a limiting member connected to the housing, the elastic body is connected to the limiting member, and the piston is spaced apart from the limiting member when the damping member is in the initial state.

[0013] In some embodiments of the first aspect, the limiting member is located in the moving direction of the piston and is elastic.

[0014] In some embodiments of the first aspect, the shell has an installation cavity, the damping assembly is arranged in the installation cavity, the damping member is connected between the cavity wall of the installation cavity and the piston, the shell has a connecting hole connecting the installation cavity with the external space, and the push rod is movably connected to the connecting hole and extends from the external space into the installation cavity.

[0015] In some embodiments of the first aspect, the push rod includes a rod portion slidably connected to the connecting hole and a spherical portion connected to one end of the rod portion and located in the mounting cavity. A limiting groove is provided at one end of the piston connected to the push rod facing away from the damping member, and the spherical portion movably abuts against the groove wall of the limiting groove.

[0016] In a second aspect, a vehicle is provided, comprising a vehicle body, a pedal, and a pedal feel simulation device as provided in the above embodiments, wherein the pedal feel simulation device is installed at a footrest position of the vehicle body, and the pedal is connected to the pedal feel simulation device.

[0017] Compared to the prior art, the present invention provides the following technical advantages: when the driver steps on the pedal, the push rod pushes one of the pistons, which in turn drives the other pistons to move synchronously, causing all damping elements to transition from an initial state to a damping state. The damping forces generated by all damping elements are superimposed and act on the driver's foot via the push rod, creating a damping sensation for the driver. This damping sensation generates a stable pedal force. Because the pedal feel simulation device incorporates multiple damping elements, the pedal force can be adjusted by adjusting the damping force of each damping element, replacing the damping element, or varying the number of damping elements. In practical applications, the damping sensation can be customized to meet the needs of different customers, reducing initial development costs and enhancing the customizability of the brake-by-wire system. Furthermore, the absence of a hydraulic system reduces subsequent maintenance and operating costs, eliminating the use of environmentally polluting brake fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a cross-sectional view of a pedal feel simulation device provided by an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 10. Shell; 11. First shell portion; 12. Second shell portion; 101. Mounting cavity; 102. Slide groove; 103. Connecting hole; 20. Damping assembly; 21. Damping member; 211. Piston; 2111. Rack structure; 201. Limiting groove; 212. Damping member; 213. Limiting member; 22. Transmission gear; 30. Push rod; 31. Rod portion; 32. Ball portion. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0027] An embodiment of the utility model provides a pedal feel simulation device and a vehicle, the vehicle including a vehicle body, a pedal and the pedal feel simulation device, the pedal feel simulation device is installed at the footrest position of the vehicle body, the pedal is connected to the pedal feel simulation device and is used for the driver to step on, the pedal feel simulation device can make the driver produce a damping feeling and improve the driving experience.

[0028] See also Figure 1 The pedal feel simulation device includes a housing 10, a damping assembly 20, and a push rod 30. The damping assembly 20 is connected to the housing 10, the push rod 30 is connected to the damping assembly 20, and the pedal is connected to the push rod 30. When the driver steps on the pedal, the push rod 30 pushes the damping assembly 20, and the damping assembly 20 is used to give the driver a damping feel.

[0029] The housing 10 may be in a frame shape or a box shape, as long as it can support the damping assembly 20 .

[0030] The damping assembly 20 includes a plurality of damping members 21 . The damping member 21 includes a piston 211 and a damping element 212 .

[0031] The piston 211 is movably connected to the housing 10. The manner of the movably connected connection includes, but is not limited to, a sliding connection, a hinge connection, an abutment connection, etc., and the piston 211 is movable relative to the housing 10. The piston 211 is made of a hard material. The pistons 211 in every two damping members 21 are drivingly connected. Specifically, when there are three or more damping members 21, the piston 211 in one damping member 21 can be drivingly connected to the piston 211 in another damping member 21, or can be drivingly connected to the pistons 211 in multiple damping members 21, without limitation herein.

[0032] The damping member 212 is connected to the piston 211 and the housing 10, and all the damping members 212 can switch between the starting state and the damping state synchronously through the movement of the corresponding piston 211. It can be understood that, assuming that the two end points in the movement trajectory of each piston 211 are the first position and the second position respectively, that is, each piston 211 can move between its corresponding first position and second position, then the two pistons 211 connected by the transmission can move synchronously between the first position and the second position, wherein the first position and the second position corresponding to each piston 211 are different, and the distance between the first position and the second position can be different, or at least two of them can be the same, which is not limited here. For a single damping component 21, when the damping member 212 is in the starting state, the piston 211 is in the first position, and when the damping member 212 is in the damping state, the piston 211 is in the second state.

[0033] It should be noted that the damping state can be any state after the damping member 212 leaves the initial state, or a specific state. The second position of the piston 211 can also be any position after leaving the first position, or a specific position. There is no limitation here.

[0034] The push rod 30 is connected to a piston 211, wherein the push rod 30 can be connected to the end of the piston 211 in the moving direction, or can abut against a limiting structure at any position on the piston 211. The connection method between the push rod 30 and the piston 211 can be abutment, rotational connection, sliding connection, or fixed connection, which is not limited here. The push rod 30 can switch the damping member 212 from the starting state to the damping state by pushing the piston 211 to move. The damping member 212 can apply a damping force to the piston 211 to reset the push rod 30 during the process of switching from the starting state to the damping state. The damping force can be an elastic force, a magnetic repulsive force, or a force generated by electronic control. The damping force of the damping member 212 in each damping component 21 can be the same or different, and the state switching method can be the same or different, as long as the state can change and generate a damping force when the piston 211 moves.

[0035] When the driver steps on the pedal, push rod 30 pushes one of the pistons 211 to move. This piston 211 can then drive the other pistons 211 to move synchronously, causing all damping elements 212 to transition from their initial state to the damping state. The damping forces generated by all damping elements 212 are combined and acted on the driver's foot through push rod 30, creating a damping sensation for the driver. This damping sensation creates a stable pedal force. Because this pedal feel simulation device includes multiple damping elements 21, it can adjust the pedal force by adjusting the damping force of each damping element 212, replacing a damping element 212, or varying the number of damping elements 21. In practical applications, the damping sensation can be customized to meet the needs of different customers, reducing initial development costs and enhancing the customizability of the brake-by-wire system. Furthermore, since no hydraulic system is required, this reduces subsequent maintenance and operating costs and eliminates the use of environmentally polluting brake fluid.

[0036] In some embodiments, see Figure 1 The housing 10 has a mounting cavity 101, within which the damping assembly 20 is disposed. The mounting cavity 101 protects the damping assembly 20. The housing 10 also has a connecting hole 103, which connects the external space to the mounting cavity 101. The push rod 30 extends through the connecting hole 103. The connecting hole 103 corresponds to a piston 211 in one of the damping components 21, allowing the push rod 30 to connect to the piston 211 through the connecting hole 103.

[0037] Optionally, the push rod 30 is movably connected to the connection hole 103 and extends from the external space into the installation cavity 101. The connection hole 103 can be used to limit the range of movement of the push rod 30.

[0038] Specifically, the push rod 30 includes a rod portion 31 and a spherical portion 32. The rod portion 31 is slidably connected to the connecting hole 103 in the axial direction of the rod portion 31. The spherical portion 32 is connected to one end of the rod portion 31 located within the mounting cavity 101. A piston 211 connected to the push rod 30 has a limiting groove 201 defined at its end facing away from the damping element 212. The spherical portion 32 movably abuts against the wall of the limiting groove 201. The limiting groove 201 limits the position of the spherical portion 32 relative to the piston 211. The piston 211 abuts against the bottom of the limiting groove 201, which has a V- or U-shape. The width of the limiting groove 201 is greater than the diameter of the spherical portion 32 to minimize the restriction on the spherical portion 32. It should be noted that, except for the piston 211 connected to the push rod 30, the pistons 211 in other damping components 21 do not need to be provided with a limiting groove 201.

[0039] In other embodiments, the push rod 30 may not be connected to the housing 10, as long as it can push the piston 211 to move. The ball portion 32 may also be adapted to be rotatably connected to the limiting groove 201, so that the push rod 30 can achieve universal rotation relative to the piston 211 through the ball portion 32.

[0040] In some embodiments, see Figure 1 The housing 10 is provided with a plurality of sliding rails, and each piston 211 is slidably connected to a sliding rail. The sliding rails guide the piston 211, and the first and second positions can be located at two positions on the corresponding sliding rails. The sliding rails can be groove-shaped or ridge-shaped, and are not limited here.

[0041] In some embodiments, see Figure 1 The damping assembly 20 includes several transmission structures movably connected to the housing 10. Each pair of pistons 211 is connected to each other through the transmission structure. This allows for synchronized movement of all pistons 211. The transmission structure can be independent of the pistons 211, fixedly connected to them, or integrally formed with them.

[0042] Optionally, the transmission structure includes a transmission gear 22 rotatably connected to the housing 10. A rack structure 2111 is provided on the side wall of the piston 211. The rack structure 2111 extends in the same direction as the movement direction of the piston 211. The transmission gear 22 meshes with the rack structures 2111 on both pistons 211, and the movement directions of the two transmission-connected pistons 211 are parallel and opposite. In this way, the side-by-side arrangement of the pistons 211 can reduce the space occupied by the damping assembly 20, thereby reducing the volume of the housing 10. The damping members 212 of the two damping components 21 are respectively disposed on opposite sides of the two transmission-connected pistons 211, and the rack structures 2111 of the two pistons 211 are disposed on the side of the adjacent side and are integrally formed with the pistons 211 for ease of processing.

[0043] Optionally, the transmission gear 22 is rotatably connected to the cavity wall of the installation cavity 101 to facilitate installation.

[0044] In some embodiments, see Figure 1The damping member 212 includes an elastic body disposed between the piston 211 and the housing 10. The elastic body is located on the side of the piston 211 that is moving from the first position to the second position. When the damping member 212 switches from the initial state to the damping state, the elastic body compresses and deforms, and the damping force is the elastic force generated by the elastic body due to the compression deformation. When the damping member 212 is in the initial state, the elastic body may not undergo compression or tension deformation, or it may undergo compression deformation. In this case, the piston 211 remains in the first position due to the limiting effect of the housing 10. The provision of the elastic body reduces the energy consumption of the pedal feel simulation device and lowers processing costs. When the damping feel needs to be adjusted, this can be achieved by adjusting the elastic coefficient of the elastic body.

[0045] In some embodiments, see Figure 1 The damping member 212 further includes a stopper 213 connected to the housing 10. The elastic body is connected to the stopper 213. When the damping member 212 is in the initial state, the piston 211 is spaced from the stopper 213, allowing a certain amount of space for the piston 211 to move. The stopper 213 is used to limit the connection position of the damping member 212 and prevent the damping member 212 from radial displacement.

[0046] Optionally, the elastic body is a spring. The axial ends of the spring are respectively connected to the end of the piston 211 and the cavity wall of the installation cavity 101. The limiter 213 can be protruded from the cavity wall of the installation cavity 101, and the spring is sleeved outside the limiter 213.

[0047] Optionally, the limiter 213 is located in the moving direction of the piston 211, and the limiter 213 is elastic. In this way, when the driver's stepping force is large, the piston 211 can abut against the limiter 213, and the limiter 213 can cushion the piston 211 through its own elastic deformation, thereby preventing the piston 211 from having a hard collision with the housing 10 and improving the damping feeling. When the piston 211 is in the second position, the piston 211 can abut against the limiter 213, or be spaced from the limiter 213, or be in a position that compresses the limiter 213. The height of the limiter 213 protruding from the cavity wall of the installation cavity 101 can be set higher. In this way, when the piston 211 reaches the second position, the piston 211 can squeeze the limiter 213 until it is elastically deformed. The limiter 213 and the elastomer jointly apply a damping force to the piston 211 to improve the damping effect.

[0048] Optionally, the limiting member 213 can also be made of a hard material to improve the limiting effect on the elastic body. In this case, the height of the limiting member 213 protruding from the cavity wall of the installation cavity 101 can be set lower to avoid hard collision with the piston 211.

[0049] In some embodiments, see Figure 1The shell 10 includes a first shell portion 11 and a second shell portion 12 that are connected to each other. The first shell portion 11 is formed with a mounting groove. The second shell portion 12 covers the notch of the mounting groove and is jointly enclosed with the first shell portion 11 to form a mounting cavity 101. The connecting hole 103 is opened in the first shell portion 11.

[0050] exist Figure 1 In the illustrated embodiment, two damping members 21 are provided. The sliding track includes two chute grooves 102 formed on the housing 10. The two chute grooves 102 extend in parallel and can be arranged in a forward-backward direction. The pistons 211 are slidably connected to the chute grooves 102, so that both pistons 211 move in the forward-backward direction. The two chute grooves 102 are arranged in a vertical direction. The connecting holes 103 connect the adjacent groove sidewalls of the two chute grooves 102. The transmission gear 22 is rotatably connected to the hole walls of the connecting holes 103. The rack structure 2111 of the lower piston 211 is located on the upper side, and the rack structure 2111 of the upper piston 211 is located on the lower side. The transmission gear 22 meshes with the rack structures 2111 on the two pistons 211. All the chute grooves 102 and all the connecting holes 103 together enclose the mounting cavity 101 of the housing 10. In the lower damping member 21, a limit slot 201 is defined at the rear side of the piston 211. The push rod 30 extends in the front-to-back direction, with its spherical portion 32 resting against the bottom of the limit slot 201. A spring is connected between the front end of the piston 211 and the second housing 12. A rigid limiter 213 is protruding from the second housing 12, and the spring is sleeved onto the limiter 213. In the upper damping member 21, a spring is connected to the rear end of the piston 211 and to the first housing 11. A resilient limiter 213 is protruding from the first housing 11, and the spring is sleeved onto the limiter 213.

[0051] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A pedal feel simulation device, characterized in that: include: case; A damping assembly comprising a plurality of damping members, each comprising a piston and a damping member, wherein the piston is movably connected to the housing, the pistons in every two damping members are drivingly connected, and the damping member is connected to the piston and the housing, and all the damping members can be synchronously switched between an initial state and a damping state by movement of the corresponding piston; A push rod abuts against the piston and can switch the damping member from the starting state to the damping state by pushing the piston to move. The damping member can apply a damping force to the piston to reset the push rod during the switching process from the starting state to the damping state.

2. The pedal feel simulation device according to claim 1, wherein: The housing is provided with a plurality of sliding tracks, and each of the pistons is slidably connected to one of the sliding tracks.

3. The pedal feel simulation device according to claim 1, wherein: The damping assembly includes a plurality of transmission structures movably connected to the housing, and every two pistons are transmission-connected via the transmission structures.

4. The pedal feel simulation device according to claim 3, wherein: The transmission structure includes a transmission gear rotatably connected to the housing, and a rack structure is provided on the side wall of the piston. The extension direction of the rack structure is the same as the movement direction of the piston. The transmission gear is engaged with the rack structures on the two pistons, and the movement directions of the two transmission-connected pistons are parallel and opposite.

5. The pedal feel simulation device according to claim 1, wherein: The damping member includes an elastic body arranged between the piston and the housing. When the damping member switches from the initial state to the damping state, the elastic body is compressed and deformed. The damping force is the elastic force generated by the compression and deformation of the elastic body.

6. The pedal feel simulation device according to claim 5, wherein: The damping member further includes a limiting member connected to the housing, the elastic body is connected to the limiting member, and the piston is spaced apart from the limiting member when the damping member is in the initial state.

7. The pedal feel simulation device according to claim 6, wherein: The limiting member is located in the moving direction of the piston and is elastic.

8. The pedal feel simulation device according to claim 1, wherein: The shell has an installation cavity, the damping assembly is arranged in the installation cavity, the damping member is connected between the cavity wall of the installation cavity and the piston, the shell is provided with a connecting hole connecting the installation cavity and the external space, the push rod is movably connected to the connecting hole and extends from the external space into the installation cavity.

9. The pedal feel simulation device according to claim 8, wherein: The push rod includes a rod portion slidably connected to the connecting hole and a spherical portion connected to one end of the rod portion and located in the mounting cavity. A limiting groove is provided at one end of the piston connected to the push rod facing away from the damping member, and the spherical portion movably abuts against the groove wall of the limiting groove.

10. A vehicle, characterized in that: The vehicle comprises a vehicle body, a pedal and the pedal feel simulation device according to any one of claims 1 to 9, wherein the pedal feel simulation device is installed at the footrest position of the vehicle body, and the pedal is connected to the pedal feel simulation device.

Images