Pedal simulator, braking system and vehicle

Abstract

The utility model relates to the technical field of vehicle braking systems, in particular to a pedal simulator, a braking system and a vehicle, the pedal simulator comprises a pedal component, a cam, an elastic assembly and a roller, the cam is connected with the pedal component to enable the pedal component to drive the cam to rotate, and the elastic assembly comprises a body, an elastic component and a push rod component. One end of the elastic component abuts against the body, the other end of the elastic component abuts against one end of the push rod component, the roller is rotatably connected with the other end of the push rod component, and the roller makes contact with the peripheral face of the cam so as to drive the push rod component to move relative to the body to enable the elastic component to stretch out and draw back when the cam rotates. According to the pedal simulator, pedal experience and use can be smoother, and the driving experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking systems, and particularly relates to a pedal simulator, a braking system and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the automation of vehicles has received extensive attention from researchers. The wire-controlled chassis is very important for the development of vehicle automation. The emergence of wire-controlled braking technology realizes the decoupling of human power and braking force. The force exerted by the driver on the brake pedal is only used to push the brake pedal push rod to move. How to provide a good braking feel for the driver has become one of the research focuses. In related technologies, most pedal simulators use different spring combinations to simulate the foot feeling during braking, but the multi-spring combination makes the relationship between the pedal reaction force and the pedal displacement a broken line, affecting the user experience. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related technologies to some extent. To this end, an embodiment of the utility model provides a pedal simulator, which can make the pedal experience smoother and improve the driving and riding experience of users.

[0004] An embodiment of the utility model also provides a braking system.

[0005] An embodiment of the utility model also provides a vehicle.

[0006] The pedal simulator in the embodiment of the utility model includes: a pedal component; a cam, which is connected to the pedal component so that the pedal component drives the cam to rotate; an elastic component, which includes a body, an elastic part and a push rod part, one end of the elastic part abuts against the body, and the other end of the elastic part abuts against one end of the push rod part; a roller, which is rotatably connected to the other end of the push rod part, and the roller is in contact with the outer peripheral surface of the cam to drive the push rod part to move relative to the body when the cam rotates so that the elastic part expands and contracts.

[0007] The pedal simulator in the embodiment of the utility model can make the pedal experience smoother and improve the driving and riding experience of users.

[0008] In some embodiments, the ratio of the outer limit distance from the rotation center of the cam to the outer contour of the cam to the radius of the base circle of the cam is A, and 1.1 ≤ A ≤ 60.

[0009] In some embodiments, the lift angle of the cam is B, and 10° ≤ B ≤ 60°.

[0010] In some embodiments, the tangent line at the initial point of the lift stroke of the cam is orthogonal to the axis of the push rod component, and the tangent line at the end point of the lift stroke of the cam is parallel to the axis of the push rod component, so that the roller is limited to move during the lift stroke of the cam.

[0011] In some embodiments, the outer peripheral surface of the cam has a concave curved surface, and the path where the surface is located constitutes the lift stroke.

[0012] In some embodiments, the body has a chamber with one end open, the elastic component is located in the chamber, and one end of the push rod component is located in the chamber and is movable relative to the body.

[0013] In some embodiments, the elastic assembly further includes a guide rod, the guide rod is connected to the inner wall surface of the other end of the chamber, the elastic component is sleeved on the guide rod, one end of the elastic component abuts against the inner wall surface of the other end of the chamber, and one end of the push rod component extends into the chamber and is sleeved on the guide rod.

[0014] In some embodiments, the pedal component includes a pedal, a connecting rod, and a rotating shaft. The pedal is connected to one end of the connecting rod, the other end of the connecting rod is sleeved on one end of the rotating shaft, and the cam is sleeved on the other end of the rotating shaft.

[0015] The braking system according to an embodiment of the present invention includes the pedal simulator described in any one of the above.

[0016] For the braking system according to an embodiment of the present utility model, by adopting the above pedal simulator, the pedal experience can be made smoother, improving the driving and riding experience of users.

[0017] The vehicle according to an embodiment of the present invention includes the braking system described above.

[0018] For the vehicle according to an embodiment of the present utility model, by adopting the above braking system, the pedal experience can be made smoother, improving the driving and riding experience of users. Description of the Drawings

[0019] Figure 1 is a cross-sectional view of the elastic assembly according to an embodiment of the present utility model.

[0020] Figure 2 is a schematic diagram of the pedal simulator according to an embodiment of the present utility model.

[0021] Figure 3 is a schematic diagram of the pedal simulator according to an embodiment of the present utility model.

[0022] Figure 4 is a schematic diagram of the diameter of the circle where the outer limit distance of the outer contour of the cam and the diameter of the base circle according to an embodiment of the present utility model.

[0023] Reference numerals:

[0024] Roller 1

[0025] Pedal assembly 2, pedal 21, connecting rod 22, rotating shaft 23

[0026] Elastic component 3, body 31, guide rod 311, elastic member 32, push rod assembly 33, collar 331

[0027] Cam 4, curved surface 41 Detailed implementation mode

[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0029] The pedal simulator according to the embodiment of the present invention includes a pedal assembly 2, a cam 4, an elastic component 3 and a roller 1. The cam 4 is connected to the pedal assembly 2 so that the pedal assembly 2 drives the cam 4 to rotate. The elastic component 3 includes a body 31, an elastic member 32 and a push rod assembly 33. One end of the elastic member 32 abuts against the body 31, and the other end of the elastic member 32 abuts against one end of the push rod assembly 33. The roller 1 is rotatably connected to the other end of the push rod assembly 33. The roller 1 is in contact with the outer peripheral surface of the cam 4 to drive the push rod assembly 33 to move relative to the body 31 when the cam 4 rotates, so that the elastic member 32 expands and contracts.

[0030] Specifically, as Figures 1 to 4 , the stepping member is connected to the cam 4, and the cam 4 is rotatably mounted on the vehicle body. The pedal assembly 2 drives the cam 4 to rotate, that is, when the user brakes or accelerates, the pedal assembly 2 is stepped on to make the cam 4 rotate. The roller 1 is rotatably connected to the lower end of the push rod assembly 33.

[0031] The lower end of the roller 1 is in contact with the outer peripheral surface of the cam 4. The surface of the cam 4 in contact with the roller 1 is a curved surface 41, that is, the surface of the cam 4 in contact with the roller 1 during the pushing stroke is a curved surface 41, so that when the pedal assembly 2 drives the cam 4 to rotate, the contact between the roller 1 and the cam 4 is smoother. At the same time, the roller 1 is in contact with the cam 4. When the cam 4 rotates, that is, when the pedal assembly 2 drives the cam 4 to rotate, the roller 1 rotates to avoid friction between the roller 1 and the cam 4, reduce the wear of the roller 1 and the cam 4, and improve the service life of the roller 1 and the cam 4.

[0032] The elastic member 32 extends in the up and down direction. The upper end of the elastic member 32 abuts against the body 31, and the lower end of the elastic member 32 abuts against the upper end of the push rod member 33. The elastic member 32 is arranged inside the body 31 and expands and contracts in the up and down direction to cope with the rotation of the cam 4. That is, when the pedal member 2 drives the cam 4 to rotate, the roller 1 rolls on the curved surface 41 of the cam 4. That is, the roller 1 moves in the up and down direction to cause the elastic member 32 to expand and contract in the up and down direction.

[0033] The roller 1 is rotatably arranged at the lower end of the push rod. When the cam 4 rotates, the roller 1 rotates accordingly, avoiding direct friction between the roller 1 and the cam 4, which may cause abnormal noise, and avoiding the influence of the worn cam 4 and roller 1 on the use experience.

[0034] The elastic member 32 can be a spring, or the elastic member 32 is other existing elastic members 32 or elastic devices.

[0035] In the pedal simulator according to the embodiment of the present invention, by arranging the roller 1, when the cam 4 rotates, the roller 1 rotates relative to the cam 4, reducing the friction between the roller 1 and the cam 4 and reducing abnormal noise of the vehicle. At the same time, the contact surface between the cam 4 and the roller 1 is the curved surface 41, or can be understood as a smooth curved surface 41, which can make the experience of using the pedal 21 smoother and improve the driving experience of the user. Compared with the use of multi-stage springs, in the pedal simulator of the present application, by arranging the curved surface 41 on the cam 4 and arranging the roller 1 to roll on the lift stroke of the cam 4, the pedal force-displacement curve formed by the displacement of the pedal member 2 and the reaction force received by the pedal member 2 is smoother.

[0036] In some embodiments, the ratio of the outer limit distance of the outer contour of the cam 4 to the radius of the base circle of the cam 4 is A, and 1.1 ≤ A ≤ 60.0. The outer limit distance of the outer contour of the cam 4 from the rotation center of the cam 4 is the farthest distance from the center of the cam 4 to the outer contour.

[0037] Specifically, as Figures 1 to 4, the ratio of the outer limit distance of the outer contour of the cam 4 to the base circle radius of the cam 4 is A, and the values of A are 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 3.0, 5.0, 7.0, 10.0, 20.0, 25.0, 30.0, 34.0, 40.0, 41.2, 42.3, 43.3, 43.4, 44.4, 44.5, 50.0, 53.0, 55.0, 56.0, 58.6, 59.2, 59.9, 60.0. It can be understood that the ratio of the diameter of the circle corresponding to the far rest angle of the cam 4 to the diameter of the circle corresponding to the base circle of the cam 4 is A, or it can be understood that the ratio of the diameter of the circle corresponding to the maximum motion contour of the cam 4 to the diameter of the circle corresponding to the minimum motion contour of the cam 4, which is convenient for defining the curved surface 41 on the cam 4, so that the curve on the two-dimensional coordinate diagram corresponding to the feedback force received by the pedal member 2 and the displacement of the pedal 21 is smoother, and thus the user experience is smoother.

[0038] It should be noted that in Figure 4 , the diameter of the base circle of the cam 4 is set as R1, and the diameter of the circle where the limit distance from the rotation center of the cam 4 to the outer contour of the cam 4 is located is set as R2. That is, the limit distance from the rotation center of the cam 4 to the outer contour of the cam 4 is the radius of the circle where it is located, and R2 is the diameter of the circle where it is located.

[0039] In some embodiments, the lift motion angle is B, and 10° ≤ B ≤ 60°.

[0040] Specifically, as Figures 1 to 4 , the lift motion angle is B, and 10° ≤ B ≤ 60°, that is, the angle of the contact surface of the roller 1 on the cam 4 corresponding to the maximum motion contour of the cam 4 is B, and B can be 10°, 11°, 12°, 13°, 14°, 15°, 15°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 30°, 35°, 40°, 41°, 45°, 46°, 50°, 55°, 56°, 57°, 58°, 59°, 60°. Furthermore, the lift motion angle can be determined according to the actual displacement and angle of braking, and the ratio of the maximum radius vector of the cam 4 to the minimum radius vector of the cam 4 is set as A. By setting A and B to cooperate with each other, the force on the pedal 21 received by the pedal member 2 and the displacement of the pedal 21 are adjusted. At the same time, it is convenient to set the curved surface 41 with different lengths, and it is convenient to obtain a smoother pedal 21 force-displacement curve, improving the use experience of the pedal member 2.

[0041] In some embodiments, the tangent line at the starting point of the lift of the cam 4 is orthogonal to the axis of the push rod member 33, and the tangent line at the end point of the lift of the cam 4 is parallel to the axis of the push rod member 33, so that the roller 1 is limited to the lift motion of the cam 4.

[0042] Specifically, as Figures 1 to 4 , the tangent line at the initial point of the lift stroke of the cam 4 is orthogonal to the extending direction of the push rod member 33. That is, when the pedal member 2 is not stepped on, the tangent direction of the surface 41 at the contact point between the cam 4 and the push rod member 33 is orthogonal to the extending direction of the push rod. Furthermore, the elastic force of the elastic member 32 cannot act to rotate the cam 4. That is, after the cam 4 returns to the initial point, the elastic force of the elastic member 32 on the cam 4 no longer rotates the cam 4. That is, the cam 4 no longer rotates clockwise.

[0043] When the tangent line at the end point of the lift stroke of the cam 4 is parallel to the extending direction of the push rod member 33, the roller 1 is limited to move during the lift stroke of the cam 4. When the cam 4 rotates, the tangent direction of the contact point between the roller 1 and the cam 4 is parallel to the extending direction of the push rod. At this time, the cam 4 cannot be stepped on further. That is, the cam 4 no longer rotates counterclockwise. Furthermore, it plays a role in limiting the rotation of the cam 4, and there is no need to separately limit the rotation of the cam 4.

[0044] For the pedal simulator according to the embodiment of the present utility model, by setting the surface 41 of the cam 4, the tangent line at the initial point of the lift stroke of the cam 4 is orthogonal to the extending direction of the push rod member 33 to stop the acting force of the elastic member 32 stretching on the rotation of the cam 4. Furthermore, the stepped-on pedal member 2 no longer rebounds. And the tangent line at the end point of the lift stroke of the cam 4 is parallel to the extending direction of the push rod member 33, so that the roller 1 is limited to move during the lift stroke of the cam 4. Furthermore, it plays a role in limiting the rotation of the cam 4, and there is no need to separately set a component to limit the rotation of the cam 4, which can make the experience of using the pedal 21 smoother and improve the driving experience of the user.

[0045] In some embodiments, the outer peripheral surface of the cam 4 has a concave surface 41, and the path where the surface of the surface 41 is located constitutes the lift stroke.

[0046] Specifically, as Figures 1 to 4 , the outer peripheral surface of the cam 4 is provided with the surface 41, which makes the roller 1 roll more smoothly when the cam 4 is in the lift stroke, and further makes the stepping experience of the user smoother.

[0047] In some embodiments, the body 31 has a chamber with an open end. The elastic member 32 is located in the chamber, and one end of the push rod member 33 is located in the chamber and is movable relative to the body 31.

[0048] Specifically, as Figures 1 to 4, the main body 31 has a downwardly opening chamber, the elastic member 32 is located within the chamber, and the upper end of the push rod member 33 is located within the chamber. The push rod member 33 moves in the vertical direction to compress and stretch the elastic member 32 within the chamber in the vertical direction. For example, when the cam 4 rotates counterclockwise, while the roller 1 rolls on the curved surface 41, it also moves in the vertical direction, thereby causing the elastic member 32 to expand and contract in the vertical direction. The elastic member 32 also provides a reaction force to the roller 1, thereby causing the cam 4 to rebound, facilitating the cam 4 to return to the initial point.

[0049] In the pedal simulator according to the embodiment of the present invention, by arranging the elastic member 32 within the chamber of the main body 31, the upper end of the push rod member 33 is located within the chamber, and the push rod member 33 moves in the vertical direction to compress and stretch the elastic member 32 within the chamber in the vertical direction. Thus, when the cam 4 rotates, under the action of the elastic member 32, a reaction force can be provided to the pedal member 2, and the curved surface 41 corresponding to the push stroke is set as a smooth curved surface 41, so that the reaction force provided by the elastic member 32 to the pedal member 2 and the displacement of the pedal 21 can obtain a smoother pedal 21 rod force - displacement curve, thereby enabling the user to obtain a better driving experience.

[0050] In some embodiments, the elastic assembly 3 further includes a guide rod 311. The guide rod 311 is connected to the inner wall surface of the other end of the chamber. The elastic member 32 is sleeved on the guide rod 311. One end of the elastic member 32 abuts against the inner wall surface of the other end of the chamber. One end of the push rod member 33 extends into the chamber and is sleeved on the guide rod 311.

[0051] Specifically, as Figures 1 to 4 , the guide rod 311 extends in the vertical direction. The elastic member 32 is sleeved on the upper end of the guide rod 311, and a collar 331 is provided at the upper end of the push rod member 33 to be sleeved on the guide rod 311, and the upper end surface of the collar 331 abuts against the elastic member 32. The upper end of the elastic member 32 abuts against the inner wall surface of the upper end of the guide rod 311. The collar 331 moves along the guide rod 311 in the vertical direction. Thus, the collar 331 moves in the vertical direction to cause the elastic member 32 to expand and contract in the vertical direction, thereby providing a pedal 21 force to the pedal member 2. That is, after a person steps on the pedal member 2, the reaction force fed back to the user by the pedal member 2 is the pedal 21 force.

[0052] The guide rod 311 defines the expansion and contraction direction of the elastic member 32, so that the elastic member 32 and the push rod member 33 do not rotate relative to the vehicle body.

[0053] The pedal simulator according to an embodiment of the present utility model is provided with a guide rod 311 to guide the displacement of the push rod member 33 and the elastic member 32 in the up and down directions, avoiding the rotation of the push rod member 33 or the elastic member 32 in the up and down directions, and improving the stability and safety of the use of the pedal simulator.

[0054] In some embodiments, the pedal member 2 includes a pedal 21, a connecting rod 22, and a rotating shaft 23. One end of the pedal 21 is connected to one end of the connecting rod 22, the other end of the connecting rod 22 is sleeved on one end of the rotating shaft 23, and the cam 4 is sleeved on the other end of the rotating shaft 23.

[0055] The upper end of the pedal 21 is connected to the lower end of the connecting rod 22, the upper end of the connecting rod 22 is connected to the rotating shaft 23, and the rotating shaft 23 is rotatably arranged on the vehicle body. For example, by providing a bracket and arranging a bearing on the bracket, the rotating shaft 23 is installed on the vehicle body. The used structure is an existing installation component and will not be elaborated here.

[0056] The cam 4 is sleeved on the rotating shaft 23. Thus, the pedal 21 can be stepped on to rotate the cam 4, and then drive the elastic member 32 to expand and contract to provide a force for the pedal 21.

[0057] The pedal simulator according to an embodiment of the present utility model is provided with a rotating shaft 23, a connecting rod 22, and a pedal 21 to facilitate the user to step on the pedal 21, facilitating the transfer of the reaction force provided by the elastic member 32 to the pedal 21, and improving the stability and safety of the user's use.

[0058] The braking system according to an embodiment of the present invention includes the pedal simulator described in any one of the above.

[0059] The braking system according to an embodiment of the present utility model adopts the above pedal simulator, which can make the pedal 21 experience smoother use and improve the driving experience of the user.

[0060] The vehicle according to an embodiment of the present invention includes the braking system described above.

[0061] For the vehicle according to the embodiment of the present utility model, by adopting the above-mentioned braking system, the pedal 21 can be made to experience smoother use, improving the driving and riding experience of users. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present utility model, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0065] In the present utility model, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pedal simulator, characterized in that: include: Pedal parts; A cam, wherein the cam is connected to the pedal component so that the pedal component drives the cam to rotate; An elastic component, the elastic component comprising a body, an elastic component and a push rod component, one end of the elastic component abuts against the body, and the other end of the elastic component abuts against one end of the push rod component; A roller is rotatably connected to the other end of the push rod component, and the roller contacts the outer peripheral surface of the cam to drive the push rod component to move relative to the body when the cam rotates to make the elastic component expand and contract.

2. The pedal simulator according to claim 1, characterized in that The ratio of the outer limit distance of the rotation center of the cam from the outer contour of the cam to the radius of the base circle of the cam is A, and 1.1≤A≤60.

3. The pedal simulator according to claim 1, characterized in that The thrust motion angle of the cam is B, and 10°≤B≤60°.

4. The pedal simulator according to claim 1, characterized in that The tangent line at the initial point of the cam's pushing stroke is orthogonal to the axis of the push rod component, and the tangent line at the end point of the cam's pushing stroke is parallel to the axis of the push rod component, so that the roller is limited to move within the pushing stroke of the cam.

5. The pedal simulator according to claim 4, characterized in that The outer peripheral surface of the cam has a concave curved surface, and the path formed on the curved surface constitutes the thrust stroke.

6. The pedal simulator according to any one of claims 1 to 5, characterized in that: The body has a chamber with an open end, the elastic component is located in the chamber, and one end of the push rod component is located in the chamber and is movable relative to the body.

7. The pedal simulator according to claim 6, characterized in that The elastic component also includes a guide rod, which is connected to the inner wall surface of the other end of the chamber. The elastic component is sleeved on the guide rod, one end of the elastic component abuts against the inner wall surface of the other end of the chamber, and one end of the push rod component extends into the chamber and is sleeved on the guide rod.

8. The pedal simulator according to any one of claims 1 to 5, characterized in that: The pedal component comprises a pedal, a connecting rod and a rotating shaft. The pedal is connected to one end of the connecting rod. The other end of the connecting rod is sleeved on one end of the rotating shaft. The cam is sleeved on the other end of the rotating shaft.

9. A braking system, characterized in that: A pedal simulator comprising the pedal simulator according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the braking system as claimed in claim 9.

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