WO2017088625A1

WO2017088625A1 - Electronic accelerator pedal device

Info

Publication number: WO2017088625A1
Application number: PCT/CN2016/103581
Authority: WO
Inventors: 汪澎; 薛辉; 彭彦; 张雷; 张福庆; 刘行尚; 尹彦斌; 汪植亮
Original assignee: 联合汽车电子有限公司
Priority date: 2015-11-24
Filing date: 2016-10-27
Publication date: 2017-06-01
Also published as: CN106740099A; CN106740099B

Abstract

Disclosed is an electronic accelerator pedal device, comprising a base (101), a pedal arm (102), a rotary shaft (103), an accelerator pedal (120), a sensor module (104), a spring (105), and a force retarder, wherein the pedal arm (102) is linked with the accelerator pedal (120), and is mounted on the base (101) via the rotary shaft (103), the spring (105) and the force retarder are mounted in the cavity of the pedal arm (102), the cavity is located between the rotary shaft (103) and the accelerator pedal (120), and the spring (105) is mounted between the pedal arm (102) and the force retarder; and the sensor module (104) comprises a non-contact sensor, and is used to sense the rotation of the rotary shaft (103). Since the size of the non-contact sensor is small, the length of the sensor module (104) is small, consequently, the spring (105) and the force retarder can be located in the cavity of the pedal arm (102), and thereby the internal space of the pedal arm is fully utilized. Moreover, since the length of the rotary shaft (103) is reduced, the thickness of the juxtaposed rotary shaft (103) and sensor module (104) is reduced, the width of the base (101) is greatly reduced as well, whereby the electronic accelerator pedal device is suitable for use in various vehicle models with compact spatial arrangements.

Description

Electronic accelerator pedal device

Technical field

The present invention relates to an engine system for an automobile, and more particularly to an electronic accelerator pedal device.

Background technique

The design of an electronic accelerator pedal device is commonly used in automotive engine systems. At present, the electronic accelerator pedal device using the swing arm brush contact angle sensor mostly adopts a design in which the spring is placed on the rotating shaft, that is, the distance between the spring and the accelerator pedal is greater than the distance between the rotating shaft and the accelerator pedal.

As shown in FIG. 1, the patent publication CN 101508243A discloses an electronic accelerator pedal for a vehicle, which includes a housing 1, a pedal arm 5, a rotating shaft 6 and a sensor module 7, the pedal arm 5 passing through The rotating shaft 6 is mounted on the casing 1 and can rotate the rotating shaft synchronously. The sensor module 7 is connected to the rotating shaft 6. When the rotating shaft rotates, the brush arm of the sensor module is synchronously rotated. The accelerator pedal further includes a force lag generating mechanism disposed at a tail portion of the pedal arm, the force lag generating mechanism including a base, two friction members 4, a spring support 3, and a spring 2, the hollow base being located at the pedal arm 5 a rear end of the base, a friction element supporting groove is formed on each side of the base, the friction elements 4 are respectively disposed in a friction element supporting groove, and the exposed outer end surface is a friction surface; the upper end surface of the base is provided There is an open slot, the spring support 3 is disposed in the open slot, the upper end surface of the spring support 3 is provided with a spring positioning, and the spring 2 is positioned between the spring-loaded spring positioning and another spring positioning on the housing The lower end of the spring support 3 is wider at the wedge, the wedge abutting surface of the lower end two inclined surfaces of the friction element 4.

As can be seen from FIG. 1 , in the above-described electronic accelerator pedal for a vehicle, since the length of the swing arm brush contact angle sensor is large, the spring 2 and the force lag generating mechanism are arranged in front of the rotating shaft 6, that is, the rotating shaft 6 Located between the force generating mechanism and the accelerator pedal, such a design causes the spring 2 and the force generating mechanism to be superimposed with the sensor module 7 in the width direction due to The maximum diameter of the spring 2 is limited, that is, the spring 2 generally adopts a double spring that is sleeved together, and the diameter of the small spring is not to be too small, and the large spring sleeved outside the small spring does not contact the small spring, so The diameter of the large spring is generally not less than 16 mm, that is, the maximum diameter of the spring 2 is generally not less than 16 mm, and the swing arm contact angle sensor must have a certain minimum thickness in the width direction to ensure the function, thereby The width of the base of the electronic accelerator pedal device is too wide, which is not conducive to future applications in increasingly compact vehicles in various spaces.

Further, in the case where the lengths of the bases of the electronic accelerator pedal device are equal, the lengths of the inner mechanical stop point and the distance rotating shaft are relatively short, that is, the arm is short, and the principle of the lever is that the smaller the arm, the inside The greater the mechanical stop and the rotation of the shaft, the lower the strength, and the future application in the increasingly compact models of various spaces. Furthermore, the relatively short internal mechanical stop point and the distance from the rotating shaft also make the distance between the forced downshift switch and the rotating shaft too short, so that the switch pressing stroke is amplified at the pedal arm, resulting in a bad sense of the forced downshift switch. The operation speed is slower.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic accelerator pedal device that solves the problem that the pedestal width is too wide to be applied in future models that are increasingly compact in various spaces.

In order to achieve the above object, the present invention provides an electronic accelerator pedal device including: a base, a pedal arm, a rotating shaft, an accelerator pedal, a sensor module, a spring, and a force lag device, wherein the pedal arm is coupled with the accelerator pedal and passes through a rotating shaft mounted on the base, the spring and a force stagnation device being mounted in a cavity of the pedal arm, the cavity being located between the rotating shaft and an accelerator pedal, the spring being mounted on the pedal arm And the force stagnation device; the sensor module includes a non-contact sensor for sensing the rotation of the rotating shaft.

Preferably, in the above electronic accelerator pedal device, the force stagnant device comprises: a spring support base and two friction elements, and a friction element support groove is respectively formed on both side walls of the cavity of the pedal arm The two friction elements are respectively disposed in the two friction element support grooves.

Preferably, in the above electronic accelerator pedal device, the spring support seat is fixed to the step In the cavity of the plate arm, and the upper end thereof is an upper narrow and a lower width wedge shape, and the two inclined surfaces of the upper end of the wedge shape are in contact with the corresponding end faces of the two friction elements.

Preferably, in the above electronic accelerator pedal device, the lower end surface of the spring support seat is provided with a spring position, and the spring is positioned between the spring position and another spring position on the pedal arm.

Preferably, in the above electronic accelerator pedal device, the force stagnation device converts the pressure of the spring to the spring support seat into a lateral urging force to the friction member, and the lateral urging force of the friction member The center position of the pedal member varies depending on the position of the pedal arm, and the outer end surface of the friction member rubs against the inner wall of the base to generate a variable friction torque; the magnitude of the variable friction torque is changed by changing the spring support The angle of the bevel of the upper end of the wedge is adjusted.

Preferably, in the above electronic accelerator pedal device, the friction element is a columnar hexahedron, and an end surface that is in contact with the inclined surfaces of the wedge-shaped upper end of the spring support seat is a curved surface or a sloped surface.

Preferably, in the above-described electronic accelerator pedal device, the cross section of the frictional element in the horizontal plane is wedge-shaped such that the frictional element obtains rotational freedom in the horizontal direction.

Preferably, in the above electronic accelerator pedal device, a magnet is disposed on the rotating shaft, and the sensor module is configured to sense a magnetic field of the magnet and convert an angular change of the magnetic field into an electrical signal.

Preferably, in the above electronic accelerator pedal device, the magnet is located on a central axis of the rotating shaft.

Preferably, in the above electronic accelerator pedal device, the rotating shaft is a stepped shaft.

In the electronic accelerator pedal device provided by the present invention, the rotation of the rotating shaft is measured using a non-contact type sensor, and the non-contact type sensor is small in size, so that the length of the sensor module is small, so that the spring and the force lag device can be disposed in the The cavity of the pedal arm located between the rotating shaft and the accelerator pedal fully utilizes the space inside the pedal arm while shortening the length of the rotating shaft, so that the parallel thickness of the rotating shaft and the sensor module is reduced, thereby The width of the base is greatly reduced to accommodate future applications in increasingly compact spaces.

DRAWINGS

1 is a structural exploded view of an electronic accelerator pedal device in the prior art;

2 is an exploded view showing the structure of an electronic accelerator pedal device according to an embodiment of the present invention;

3 is a first cross-sectional view of an electronic accelerator pedal device in accordance with an embodiment of the present invention;

4 is a second cross-sectional view of an electronic accelerator pedal device in accordance with an embodiment of the present invention;

Figure 5 is a third cross-sectional view of the electronic accelerator pedal device in accordance with an embodiment of the present invention;

Figure 6 is a cross-sectional view of a friction center in accordance with an embodiment of the present invention;

In the picture:

1-shell; 2-spring; 3-spring support; 4-friction element; 5-pedal arm; 6-axis; 7-sensor module;

101-base; 102-pedal arm; 103-rotor; 104-sensor module; 105-spring; 106-spring support; 107-friction element; 108-first ramp; 109-second ramp; 110-idle Friction center; 111-friction center at full speed; 120-throttle pedal.

detailed description

Specific embodiments of the present invention will be described in more detail below with reference to the drawings. Advantages and features of the present invention will be apparent from the description and appended claims. It should be noted that the drawings are in a very simplified form and all use non-precise proportions, and are only for convenience and clarity to assist the purpose of the embodiments of the present invention.

An embodiment of the present invention provides an electronic accelerator pedal device, as shown in FIG. 2, comprising: a base 101, a pedal arm 102, a rotating shaft 103, a sensor module 104, a spring 105, an accelerator pedal 120, and a force lag device; The arm 102 is interlocked with the accelerator pedal 120 and mounted on the base 101 through the rotating shaft 103; the base 101 supports the pedal arm 102 to enable it to surround between the rest position and the maximum step down position The rotating shaft 103 rotates; the spring 105 returns the pedal arm 102 to the rest position.

The sensor module 104 includes a non-contact sensor for sensing the rotation of the rotating shaft 103. move. Compared with the brush contact angle sensor, the size of the non-contact sensor is small, so that the length of the sensor module 104 is reduced, so that the spring 105 and the force lag device can be mounted on the pedal arm. In the cavity of 102, the cavity is located between the rotating shaft 103 and the accelerator pedal 120, that is, the spring 105 and the force lag device may be located between the rotating shaft 103 and the accelerator pedal 120, making full use of the The space inside the pedal arm 102 is such that the width of the base 101 is small.

At the same time, the length of the rotating shaft 103 is shortened, and the length of the rotating shaft 103 is shortened to 30 mm, so that the parallel width of the rotating shaft 103 and the sensor module 104 is greatly reduced, thereby making the base 101 The width is further reduced to accommodate future applications in increasingly compact vehicles in a variety of spaces.

Further, as shown in FIG. 3, the force stagnant device includes a spring support base 106 and two friction elements 107, and a friction element support groove is defined on each of the two side walls of the cavity of the pedal arm 102, Two friction elements 107 are respectively disposed in the two friction element supporting grooves; the spring supporting seat 106 is fixed in the cavity of the pedal arm 102, and the upper end thereof is a narrow upper and lower wide wedge shape, and the upper end of the wedge shape Two inclined faces are in contact with the end faces of the two friction elements 107, the lower end face of the spring support seat 106 is provided with a spring positioning, and the spring 105 is positioned at the spring positioning and another spring positioning on the pedal arm 102 between. The force lag device converts the pressure of the spring 105 against the spring support seat 106 into a lateral urging force against the friction member 107, the pressure varying with the position of the pedal arm 102, the friction member The outer end surface of the 107 is rubbed against the inner wall of the base 101 to generate a variable frictional force; the magnitude of the frictional force is adjusted by changing the angle of the inclined surface of the wedge-shaped upper end of the spring support base 103.

The force lag device converts the pressure of the spring 105 against the spring support seat 106 into a lateral urging force to the friction element 107, and the spring compression force center is caused by the difference in the amount of compression of the front and rear of the spring by different pedal arm positions. The position of the pedal arm is changed back and forth, and due to the wedge-shaped structure of the spring support seat 106, it is possible to obtain a range of rotational degrees of freedom in the plane of symmetry, so that the lateral thrust center position of the friction element 107 can follow The position of the pedal arm varies, the friction element The outer end surface of the member rubs against the inner wall of the base to generate a variable friction torque; the magnitude of the variable friction is adjusted by changing the angle of the slope of the upper end of the wedge-shaped end of the spring support.

As a non-limiting example, the friction element 107 is a cylindrical hexahedron whose end surface that is in contact with the two inclined faces of the wedge-shaped upper end of the spring support seat 106 is a curved surface or a sloped surface. It will be understood that the invention does not limit the specific shape of the friction element 107, it may also be other columnar structures.

As shown in FIG. 4 and FIG. 5, during the process of rubbing the outer end surface of the friction member 107 against the inner wall of the base 101, an outer end surface of the friction member 107 and an inner wall of the base 101 are formed. Friction fit surface. The cross section of the friction element 107 is wedge-shaped, and the friction element 107 forms a first slope 108 on the mating surface with the pedal arm 102, so that the friction element 107 obtains a degree of freedom of rotation in the horizontal direction. Further, the spring support base 106 forms a second inclined surface 109 on the mating surface of the pedal arm 102, so that the spring support base 106 obtains a rotational freedom in a vertical plane, thereby enabling the The angle of inclination of the frictional engagement surface in the horizontal plane can be adaptively adjusted with the angle of the inner wall of the base 101, avoiding the extra internal friction force of the friction element 107 that cannot be tilted in the horizontal plane, so that the spring 105 The spring force is closer to the design ratio to transmit pressure to the inner wall of the base, thereby improving the stability of the force lag.

In the embodiment of the present invention, the force lag of the force lag device increases as the pedaling depth of the accelerator pedal 120 increases, which improves the stability of the control when the accelerator pedal 120 is deeply stepped on.

Specifically, as shown in FIG. 6, when the accelerator pedal 120 is in the approaching idle position, the amount of compression of the spring 105 near the side of the rotating shaft 103 is large, and since the frictional element 107 and the spring support seat 106 are The first inclined surface 108 and the second inclined surface 109 formed in the pedal arm 102 enable the frictional element 107 to adaptively rotate in a horizontal plane, thereby obtaining the frictional element 107 near the side of the rotating shaft 103. The positive pressure is large, and the friction center 110 is closer to the rotating shaft 103 at the time of idling, that is, the arm Rf1 is small at the time of idling, so that the friction torque Tf1 is small and the corresponding force lag is small. Among them, the friction torque Tf1 is:

Tf1=Ff*Rf1. (Formula 1)

When the accelerator pedal 120 is near full speed, the spring 105 is away from the side of the rotating shaft 103 The amount of compression is large, so that the positive pressure obtained by the friction element 107 away from the side of the rotating shaft 103 is large, and therefore, the friction center 111 is further away from the rotating shaft 103 at full speed, that is, the working arm Rf2 is larger at full speed. Therefore, the friction torque Tf2 is large, and the corresponding force lag is large. Among them, the friction torque Tf2 is:

Tf2 = Ff * Rf2. (Formula 2)

In this embodiment, a non-contact type sensor is used, and therefore, a magnet is disposed on the rotating shaft 103, and the non-contact type sensor is used to sense a magnetic field of the magnet and convert the angular change of the magnetic field into electricity. signal. Specifically, the magnet is located on a central axis of the rotating shaft 103, and the rotating shaft is a stepped shaft.

In summary, in the electronic accelerator pedal device provided by the embodiment of the present invention, the rotation of the rotating shaft is measured by using a non-contact type sensor, and the non-contact type sensor is small in size, so that the length of the sensor module is small, thereby causing the spring and the force lag device. The space between the rotating shaft and the accelerator pedal, which is located in the pedal arm, fully utilizes the space inside the pedal arm while shortening the length of the rotating shaft, thereby reducing the parallel thickness of the rotating shaft and the sensor module The small size further reduces the width of the pedestal to accommodate future applications in increasingly compact spaces.

The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any changes in the technical solutions and technical contents disclosed in the present invention may be made by those skilled in the art without departing from the technical scope of the present invention. The content is still within the scope of protection of the present invention.

Claims

An electronic accelerator pedal device includes: a base, a pedal arm, a rotating shaft, an accelerator pedal, a sensor module, a spring, and a force lag device, wherein the pedal arm is coupled to the accelerator pedal and mounted on the base through the rotating shaft, The spring and the force stagnation device are mounted in a cavity of the pedal arm, the cavity is located between the rotating shaft and the accelerator pedal, and the spring is mounted on the pedal arm and the force lag device The sensor module includes a non-contact sensor for sensing the rotation of the rotating shaft.
The electronic accelerator pedal device according to claim 1, wherein said force lag device comprises: a spring support base and two friction elements, one on each of two side walls of the cavity of said pedal arm The friction element supports a groove, and the two friction elements are respectively disposed in the two friction element support grooves.
The electronic accelerator pedal device according to claim 2, wherein said spring support base is fixed in a cavity of said pedal arm, and an upper end thereof is a narrow upper and lower wedge shape, and two inclined surfaces of said wedge upper end Contacting the respective end faces of the two friction elements.
The electronic accelerator pedal apparatus according to claim 3, wherein a lower end surface of said spring support seat is provided with a spring positioning, said spring being positioned between said spring positioning and another spring positioning on the pedal arm.
An electronic accelerator pedal apparatus according to claim 4, wherein said force stagnation means converts the pressure of said spring to said spring support to a lateral urging force to said frictional element, said side of said frictional element The center position of the pressing force varies with the position of the pedal arm, and the outer end surface of the friction element rubs against the inner wall of the base to generate a variable friction torque; the magnitude of the variable friction torque is changed by The angle of the bevel of the upper end of the wedge of the spring support is adjusted.
An electronic accelerator pedal device according to claim 2, wherein said friction member It is a columnar hexahedron whose end surface which is in contact with the corresponding inclined surface of the wedge-shaped upper end of the spring support seat is a curved surface or a sloped surface.
The electronic accelerator pedal device according to claim 2, wherein a cross section of said friction member in a horizontal plane is wedge-shaped such that said friction member obtains rotational freedom in a horizontal direction.
The electronic accelerator pedal device according to claim 1, wherein a magnet is disposed on the rotating shaft, and the sensor module is configured to sense a magnetic field of the magnet and convert an angular change of the magnetic field into an electrical signal.
The electronic accelerator pedal device according to claim 8, wherein said magnet is located on a central axis of said rotating shaft.
The electronic accelerator pedal device according to claim 1, wherein said rotating shaft is a stepped shaft.