An accelerator pedal system and a vehicle

Abstract

The present invention provides an accelerator pedal system and a vehicle. The accelerator pedal system includes a pedal, a housing, a spring, and a wear-resistant ring. The pedal includes a fixedly connected pedal arm, a first rotating shaft portion, and a spring bowl. The pedal arm and the spring bowl are located at both ends of the first rotating shaft portion. The housing includes an upper cover and a second rotating shaft portion. The spring is positioned between the upper cover and the spring bowl. The second rotating shaft portion is rotatably connected to the first rotating shaft portion through the wear-resistant ring. The wear-resistant ring is located between the first rotating shaft portion and the second rotating shaft portion. The first rotating shaft portion, the second rotating shaft portion, and the wear-resistant ring form a friction pair, and the friction pair is used to provide the hysteresis force required by the accelerator pedal system. After adopting the above technical solution, the stability of the function curve of the accelerator pedal is improved, the number of structural elements is reduced, and the cost is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an accelerator pedal system and a vehicle. Background Art

[0002] Nowadays, vehicles have become an essential means of transportation for people to travel. The accelerator pedal is a device for controlling the fuel supply on the internal combustion engine. During the driving process of the vehicle, the driver controls the amount of engine intake by controlling the amount of pedaling on the accelerator pedal, thereby controlling the engine speed.

[0003] See attached Figure 1 , is a schematic diagram of the functional curve required for the accelerator pedal. It can be seen from the figure that the accelerator pedal needs to have a hysteresis force in order to give the refueling system a stable signal and give the operator a uniform feeling. The electronic accelerator pedals currently on the market either have no hysteresis effect. When the vehicle is driving on a bumpy road, it is difficult for the human foot to control the position of the pedal well, which will cause the electrical signal output by the pedal to be unstable, resulting in changes in the size of the throttle opening, causing great inconvenience to driving the car and affecting the comfort of the driver and passengers; or have a hysteresis effect, but the hysteresis effect is usually provided by the friction between the friction plate connected to the pedal and the housing, resulting in a complex structure of the entire pedal, a not compact design, a large number of parts, a large overall size of the pedal, too high requirements for the pedal installation space, and an unstable hysteresis effect.

[0004] Therefore, it is necessary to develop an accelerator pedal system with a simple structure and a stable hysteresis effect and a vehicle having the system. Summary of the invention

[0005] In order to overcome the above technical defects, an object of the present invention is to provide an accelerator pedal system with a simple structure and a stable hysteresis effect, and a vehicle having the same.

[0006] The invention discloses a throttle pedal system, comprising: a pedal, a housing, a spring and a wear-resistant ring;

[0007] The pedal comprises a pedal arm, a first rotating shaft portion and a spring bowl which are fixedly connected, wherein the pedal arm and the spring bowl are located at two ends of the first rotating shaft portion;

[0008] The shell includes an upper cover and a second rotating shaft portion, the spring is positioned between the upper cover and the spring bowl, the second rotating shaft portion is rotatably connected to the first rotating shaft portion through the wear-resistant ring, the wear-resistant ring is located between the first rotating shaft portion and the second rotating shaft portion, the first rotating shaft portion, the second rotating shaft portion and the wear-resistant ring form a friction pair, and the friction pair is used to provide the hysteresis force required by the accelerator pedal system.

[0009] Preferably, the first rotating shaft portion comprises a central column and a friction wall;

[0010] The second rotating shaft portion is cylindrical, and a through hole matching the central column is arranged inside it;

[0011] The wear-resistant ring is arranged between the second rotating shaft portion and the friction wall. A friction pair is formed between the outer side of the second rotating shaft portion and the inner side of the wear-resistant ring, and a friction pair is formed between the inner side of the friction wall and the outer side of the wear-resistant ring.

[0012] Preferably, the upper half of the friction wall is semi-circular and fits the outer side of the wear-resistant ring;

[0013] The lower half of the friction wall is U-shaped. Both ends of the U-shape have inclined surfaces that closely fit the outer side of the wear-resistant ring, and the remaining part of the U-shape has a clearance fit with the outer side of the wear-resistant ring.

[0014] Preferably, leather grains are arranged on the outer side of the second rotating shaft portion and the inner side of the friction wall.

[0015] Preferably, the leather grains are electric discharge machining grains.

[0016] Preferably, the roughness of the leather grain part is 2.24 μm to 3.15 μm.

[0017] Preferably, the pedal arm, the first rotating shaft portion, and the spring bowl are integrally injection-molded.

[0018] Preferably, the spring bowl includes an annular accommodation groove matching the shape of the spring end and a convex column extending into the middle of the spring.

[0019] Preferably, the materials of the pedal and the housing are PA66-GF40;

[0020] The material of the wear-resistant ring is POM.

[0021] The present invention also discloses a vehicle, which includes the throttle pedal system as described above.

[0022] After adopting the above technical solution, compared with the prior art, the beneficial effects are as follows: The friction plate in the prior art throttle pedal system is cancelled, and the spring bowl that is movably arranged in the prior art is fixedly arranged on the pedal. The friction pair formed by the first rotating shaft portion on the pedal, the second rotating shaft portion on the housing, and the wear-resistant ring therebetween provides the hysteresis force required by the throttle pedal system, simplifies the structure of the throttle pedal system, and can provide a stable hysteresis effect. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the functional curve required for the throttle pedal;

[0024] Figure 2Schematic diagram of the overall structure of the accelerator pedal system in an embodiment of the present invention;

[0025] Figure 3 is Figure 2 Schematic diagram of the partial structure of the accelerator pedal system in;

[0026] Figure 4 Schematic diagram of the three-dimensional structure of the first rotating shaft part;

[0027] Figure 5 Schematic diagram of the three-dimensional structure of the spring bowl.

[0028] Reference numerals:

[0029] 1 - Pedal, 11 - Pedal arm, 111 - Pedal step, 12 - First rotating shaft part, 121 - Central column, 122 - Friction wall, 123 - Accommodating gap, 1221 - Tapered surface, 13 - Spring bowl, 131 - Raised column, 132 - Accommodating groove, 2 - Spring, 3 - Housing, 31 - Upper cover, 32 - Second rotating shaft part, 4 - Wear-resistant ring. Detailed implementation manners

[0030] The advantages of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0031] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the" and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0033] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In the subsequent description, the suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of describing the present invention, and they have no specific meaning in themselves. Therefore, "module" and "component" can be used interchangeably.

[0037] See the attached Figure 2-5 , which is a schematic structural diagram of the accelerator pedal system in an embodiment of the present invention. The accelerator pedal system includes a pedal 1, a housing 3, a spring 2, and a wear-resistant ring 4.

[0038] The pedal 1 includes a pedal arm 11, a first rotating shaft portion 12, and a spring bowl 13 that are fixedly connected. Preferably, the pedal arm 11, the first rotating shaft portion 12, and the spring bowl 13 are integrally injection-molded, which is convenient for manufacturing and reduces the number of parts. The pedal arm 11 and the spring bowl 13 are located at both ends of the first rotating shaft portion 12. At one end of the pedal arm 11 away from the first rotating shaft portion 12, there is a stepping pedal 111 for the driver to step on.

[0039] The housing 3 includes an upper cover 31 and a second rotating shaft portion 32. The second rotating shaft portion 32 and the first rotating shaft portion 12 are rotationally connected through the wear-resistant ring 4, and the wear-resistant ring 4 is located between the first rotating shaft portion 12 and the second rotating shaft portion 32. The spring 2 is positioned between the upper cover 31 and the spring bowl 13 and is used to provide the return force required for the accelerator pedal system. The first rotating shaft portion 12, the second rotating shaft portion 32, and the wear-resistant ring 4 form a friction pair, and the friction pair is used to provide the hysteresis force required for the accelerator pedal system.

[0040] Specifically, in this embodiment, the first rotating shaft portion 12 includes a central column 121 and a friction wall 122. The central column 121 is a cylindrical structure extending outward from the pedal 1, and the friction wall 122 is a wall-shaped structure extending outward from the pedal 1 and surrounding the central column 121. There is an accommodation gap 123 between the friction wall 122 and the central column 121, and the second wear-resistant ring 4 and the second rotating shaft portion 32 are arranged in the accommodation gap 123. The second rotating shaft portion 32 is cylindrical, and a through hole matching the central column 121 is arranged on the inner side thereof. The central column 121 extends into the through hole, and the contact surface between the central column 121 and the inner side wall of the through hole is smooth, and the two are slightly matched with each other, so that when the pedal 1 rotates relative to the housing 3, the friction resistance here is extremely small. The wear-resistant ring 4 is arranged between the second rotating shaft portion 32 and the friction wall 122. The outer side of the second rotating shaft portion 32 and the inner side of the wear-resistant ring 4 form a friction pair, and the inner side of the friction wall 122 and the outer side of the wear-resistant ring 4 form a friction pair. Through these two friction pairs, the hysteresis force required by the accelerator pedal system is provided.

[0041] Further, in this embodiment, the upper half of the friction wall 122 is semi-annular and fits with the outer side of the wear-resistant ring 4. The lower half of the friction wall 122 is symmetrically arranged in a U-shape or a W-shape, and the two ends of the U-shape have inclined surfaces 1221 that fit tightly with the outer side of the wear-resistant ring 4, and the remaining part of the U-shape is in a clearance fit with the outer side of the wear-resistant ring 4. The hysteresis force is mainly generated by the friction between the component force transmitted by the spring 2 to the two inclined surfaces 1221 and the wear-resistant ring 4. Therefore, the lower half of the friction wall 122 does not need to be completely in contact with the outer side of the wear-resistant ring 4 to avoid excessive friction. In some embodiments, the upper half of the friction wall 122 can also be in a clearance fit with the outer side of the wear-resistant ring 4. The outer side of the second rotating shaft portion 32 is evenly fitted with the inner side of the wear-resistant ring 4.

[0042] See attached Figure 2 , 3 , F1 is the pedaling force, F2 is the force of the spring 2 acting vertically on the spring bowl 13, N1=N2, α=75° (this angle can be adjusted by setting the inclined surface 1221, and the value here is only an example), and μ is the friction coefficient.

[0043] N1=F2 / 2COS(α)=1.93F2;

[0044] ΣMa=0;

[0045] F1xR=F2xL1+μ(N1+N2)xR1;

[0046] F1=F2xL1 / R+3.86μF2xR1 / R;

[0047] 3.86 μF, 2xR1 / R is the hysteresis force.

[0048] Preferably, leather grains are provided on the outer side of the second rotating shaft portion 32 and the inner side of the friction wall 122. Specifically, the leather grains on the outer side of the second rotating shaft portion 32 are uniformly provided on its entire outer surface; the leather grains on the inner side of the friction wall 122 are preferably provided only at the inclined surface 1221. In some other embodiments, the leather grains on the inner side of the friction wall 122 may also be uniformly provided on its entire inner surface. Preferably, the leather grains are electric discharge machining grains, and the surface roughness at the leather grain portion is 2.24 μm to 3.15 μm. Preferably, the materials of the pedal 1 and the housing 3 are PA66-GF40 (nylon 66 reinforced with 40% by weight of glass fiber); the material of the wear-resistant ring 4 is POM (Polyoxymethylene). Preferably, the wall thickness at the inclined surface 1221 is greater than the wall thickness of other parts of the friction ring, so as to improve the strength of the friction part.

[0049] Furthermore, the spring bowl 13 includes an annular accommodating groove 132 matching the shape of the end portion of the spring 2 and a protruding column 131 extending into the middle of the spring 2. The annular accommodating groove 132 is used to accommodate the end portion of the spring 2 and limit it, and the protruding column 131 facilitates the installation and positioning of the spring 2. Preferably, an accommodating groove 132 matching the shape of the other end of the spring 2 is provided on the upper cover 31. In this embodiment, the spring 2 has an inner and an outer layer, and the double-layer spring 2 can better provide the return force.

[0050] The technical solution of the present invention cancels the friction plate in the prior art throttle pedal system, fixedly sets the spring bowl which is movably arranged in the prior art on the pedal, and provides the hysteresis force required by the throttle pedal system through the friction pair formed by the first rotating shaft portion on the pedal, the second rotating shaft portion on the housing and the wear-resistant ring therebetween, simplifies the structure of the throttle pedal system, reduces the number of parts, reduces the cost, and can provide a stable hysteresis effect.

[0051] The present invention also provides a vehicle, which includes the throttle pedal system as described above.

[0052] It should be noted that the embodiments of the present invention have good implementability and are not any form of limitation to the present invention. Any person skilled in the art may use the disclosed technical content to change or modify it into an equivalent effective embodiment. However, as long as it does not depart from the technical content of the present invention, any modification, equivalent change or modification made to the above embodiments according to the technical essence of the present invention still belongs to the scope of the technical solution of the present invention.

Claims

1. An accelerator pedal system, characterized in that, comprising: a pedal, a housing, a spring and a wear-resistant ring; The pedal includes a fixedly connected pedal arm, a first rotating shaft portion and a spring bowl, and the pedal arm and the spring bowl are located at both ends of the first rotating shaft portion; The housing includes an upper cover and a second rotating shaft portion, the spring is positioned between the upper cover and the spring bowl, the second rotating shaft portion is rotatably connected to the first rotating shaft portion through the wear-resistant ring, the wear-resistant ring is located between the first rotating shaft portion and the second rotating shaft portion, and the first rotating shaft portion, the second rotating shaft portion and the wear-resistant ring form a friction pair, and the friction pair is used to provide the hysteresis force required by the accelerator pedal system; The first rotating shaft portion includes a central column and a friction wall; The second rotating shaft portion is cylindrical, and a through hole matching the central column is arranged on the inner side thereof; The wear-resistant ring is arranged between the second rotating shaft portion and the friction wall, a friction pair is formed between the outer side of the second rotating shaft portion and the inner side of the wear-resistant ring, and a friction pair is formed between the inner side of the friction wall and the outer side of the wear-resistant ring.

2. The accelerator pedal system according to claim 1, characterized in that, The upper half of the friction wall is semi-circular and fits with the outer side of the wear-resistant ring; The lower half of the friction wall is U-shaped, and both ends of the U-shape have inclined surfaces that closely fit with the outer side of the wear-resistant ring, and the remaining part of the U-shape has a clearance fit with the outer side of the wear-resistant ring.

3. The accelerator pedal system according to claim 1, characterized in that, The outer side of the second rotating shaft portion and the inner side of the friction wall are provided with leather grains.

4. The accelerator pedal system according to claim 3, characterized in that, The leather grains are electric discharge machining grains.

5. The accelerator pedal system according to claim 3, characterized in that, The roughness of the leather grain part is 2.24μm - 3.15μm.

6. The accelerator pedal system according to claim 1, characterized in that, The pedal arm, the first rotating shaft portion and the spring bowl are integrally injection molded.

7. The accelerator pedal system according to claim 6, characterized in that, The spring bowl includes an annular accommodation groove matching the shape of the spring end and a protruding column extending into the middle of the spring.

8. The accelerator pedal system according to claim 1, characterized in that, The materials of the pedal and the housing are PA66-GF40; The material of the wear-resistant ring is POM.

9. A vehicle, characterized in that, comprising the accelerator pedal system according to any one of claims 1 - 8.

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