JP4374180B2 - Accelerator pedal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accelerator pedal device applied to a vehicle or the like that employs a drive-by-wire system.
[0002]
[Prior art]
An accelerator pedal device applied to an electronically controlled throttle system (drive-by-wire system) that controls an engine mounted on an automobile or the like is integrally provided with a position sensor that detects the amount of depression of the accelerator pedal (pedal arm). The engine output is controlled based on the signal detected by the position sensor. Therefore, the rest position of the accelerator pedal (pedal arm) is the reference position of the signal output from the position sensor.
[0003]
In the conventional accelerator pedal device, as a mechanism for stopping the rest position of the accelerator pedal (pedal arm), it provided one resting stopper relative to the body for supporting the pedal arm rotatably, passed back by the return spring Pedal The end of the arm is brought into contact with the stop stopper to stop at the stop position. (For example, refer to Patent Document 1 and Patent Document 2).
[0004]
[Patent Document 1]
JP 2000-326754 A [Patent Document 2]
Japanese Patent Laid-Open No. 2001-180326
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional device, the pedal arm is stopped at the rest position with only one rest stopper, so that the rest position deviates from the allowable range due to deterioration with time due to wear of the rest stopper, etc. The reference position may change.
Further, if the driver suddenly releases the stepping force from the state where the driver has stepped on (releases his / her foot), the pedal arm may quickly return due to the urging force of the return spring, and a collision noise may be generated between the driver and the stop stopper.
Furthermore, the length from the pivot center of the pedal arm to the stepping portion where the driver puts his / her foot is considerably longer than the length from the pivot center to the end contacting the stop stopper. If an excessive force is applied to the toe to move the pedal arm in the reverse direction (return side), the stop stopper cannot withstand that force, and the stop stopper is deformed, damaged, or misaligned. There was a possibility of inviting.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to stably stop an accelerator pedal (pedal arm) at a predetermined rest position and prevent a collision sound and the like. It is also possible to provide an accelerator pedal device that can suppress the deviation of the rest position within an allowable range even if a change with time is caused, and that can detect the angular position with a position sensor with high accuracy.
[0007]
[Means for Solving the Problems]
An accelerator pedal device according to the present invention includes a pedal arm having an accelerator pedal for applying a pedal force, a main body that swingably supports the pedal arm, a return spring that urges the pedal arm to return to a rest position, and a pedal arm. An accelerator pedal device provided with a pause stopper provided on the main body for stopping at a pause position, wherein the pedal arm includes a first contact portion and a first contact portion provided at different positions in a return direction to the pause position. The pausing stopper has two abutting portions, and the pause stopper is elastically deformable and the first abutting portion first abuts , and the first abutting portion abuts against the first stopper and is elastically deformed. And a second stopper with which the second contact portion can come into contact later.
[0008]
According to this configuration, when the pedal arm is gently returned, the first contact portion comes into contact with the first stopper and stops at the rest position. On the other hand, when the pedal arm is quickly returned, the first contact portion comes into contact with the first stopper, and the second contact portion comes into contact with the second stopper while the first stopper is slightly elastically deformed. . As a result, the pedal arm can be reliably stopped at the predetermined rest position without causing a collision sound or the like. Further, when the first stopper is worn away due to deterioration with time or the like, the second stopper mainly serves to stop, and the pedal arm can be reliably stopped at a rest position within an allowable variation range. Furthermore, when an excessive force in the opposite direction is applied, the first stopper and the second stopper simultaneously abut against the first abutting portion and the second abutting portion and antagonize the force, It is possible to reliably stop at the rest position.
Here, a pin fixed to an arm plate that defines a pedal arm can be used as the first contact portion, and an edge portion of the arm plate can be used as the second contact portion.
[0009]
In the above configuration, the first stopper and the second stopper may be formed integrally with a resin material and fixed to the main body.
According to this configuration, handling, manufacture, assembly, molding, selection of materials, and the like of the pause stopper are facilitated.
[0010]
The said structure WHEREIN: The 1st stopper can employ | adopt the structure currently formed in the shape which is easier to elastically deform than a 2nd stopper.
According to this configuration, when the pedal arm abuts against the first stopper and then abuts against the second stopper, the impact force is absorbed by the first stopper and can be reliably stopped by the second stopper. . That is, it is possible to achieve both the impact force mitigating action and the positioning action to the rest position.
[0011]
In the above configuration, the second stopper may be formed in a flat shape, and the first stopper may be formed in a convex shape protruding from the second stopper.
According to this configuration, with a simple structure, the first stopper can have a stopping action and an impact force mitigating action, and the second stopper can mainly have a stopping action.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 6 show an embodiment of an accelerator pedal device according to the present invention. As shown in FIGS. 1 to 3, the accelerator pedal device includes a housing 10 and a cover 20 as a main body fixed to a vehicle body such as an automobile, a pedal arm 30 that is rotatably supported by the main body, and a pedal arm 30. A return spring 40 that returns to the rest position, a hysteresis generating mechanism 50 that is housed in the main body 10 and generates a hysteresis load on the pedaling force, a magnetic sensor 60 as a position sensor that detects the rotational angle position of the pedal arm 30, and the like are provided.
[0013]
The housing 10 is formed of a resin material, and as shown in FIGS. 1 to 3, a bearing hole 11 that supports a pedal shaft 31 described later, an annular recess 12 that houses a return spring 40, and a recess that houses a hysteresis generating mechanism 50. 13, flange portions 14 and 15 having joint surfaces for joining and fixing to the vehicle body, fitting protrusions 16 and claws 17 for connection with the cover 20, and the like.
[0014]
Metal flanges 14 and 15 are integrally molded with metal sleeves 14 a and 15 a that define a hole for passing a fastening bolt (or fastening screw) and a seating surface. Here, as shown in FIG. 2, the sleeve 14 a has a bent piece 14 a ′ partially bent at a substantially right angle. The bent piece 14a 'is electrically connected to the other end 72 of the conductive wiring 70 whose one end 71 is in contact with the return spring 40 (the other end 42 described later).
[0015]
The cover 20 is formed of a resin material, and as shown in FIGS. 1 and 2, a bearing hole 21 that supports the pedal shaft 31, a cylindrical portion 22 that defines the bearing hole 21, and an annular shape that is formed around the cylindrical portion 22. The recess 23, the annular groove 24 formed coaxially around the annular recess 23, the connector 25 for connecting the wiring of the magnetic sensor 60, the fitting groove 26 for coupling with the housing 10, the latching piece 27, etc. It has.
[0016]
As shown in FIGS. 1 to 4, the pedal arm 30 includes a pedal shaft 31 that is fitted in bearing holes 11 and 21 of the housing 10 and the cover 20 and is rotatably supported, and a flat plate fixed to the pedal shaft 31. An arm plate 32 having an edge portion 32a as a second contact portion, a pin 33 as a first contact portion that is fixed to the upper end of the arm plate 32 and protrudes in the horizontal direction, and is fixed to a lower end of the arm plate 32 The arm rod 34 and the accelerator pedal 35 attached to the arm rod 34 are formed. Here, the pedal shaft 31, the arm plate 32, the pin 33, and the arm rod 34 are all made of a metal material having conductivity and magnetism, and the accelerator pedal 35 is made of a resin material.
[0017]
As shown in FIGS. 2, 3, and 4, the return spring 40 is a coil spring that is formed of conductive spring steel (metal material) and generates an urging force by torsional deformation. It is accommodated and held in place by a spacer ring 45 attached from the outside.
One end 41 of the pedal arm 30 (arm plate 32) is engaged with a notch (part) 32d of the pedal arm 30 (arm plate 32), and the other end 42 defines the annular recess 12 so that a predetermined urging force is generated during assembly. The urging force is generated so that the pedal arm 30 is returned to the rest position by being latched by the latching groove 12a formed in the cylindrical portion.
[0018]
As shown in FIG. 3, the pedal arm 30 (arm plate 32) urged by the return spring 40 is restricted so as to rotate within a predetermined angular range with respect to the housing 10. That is, the housing 10 is provided with a stop stopper 18 for positioning and stopping the pedal arm 30 at the stop position, and fully open stoppers 19a and 19b for positioning and stopping the pedal arm 30 at the maximum depressed position (fully open position). .
[0019]
As shown in FIGS. 3 to 5, the pause stopper 18 is integrally formed of a resin material so as to have a first stopper 18a and a second stopper 18b. Here, the resin material is appropriately selected in consideration of impact absorption characteristics and the like.
The first stopper 18a is formed in a convex shape with the back side thinned so as to be slightly elastically deformed compared to the second stopper 18b. As a result, it is elastically deformed to absorb impact force and the like and can be elastically returned to its original position.
The second stopper 18b is formed flat so as to hold the first stopper 18a and hardly be elastically deformed. As a result, the pedal arm 30 is reliably positioned with high precision and stopped at a predetermined position.
[0020]
As shown in FIG. 3, the stop stopper 18 is fixed in the recess 13 of the housing 10 by fitting the fitting recess 18 c to the fitting protrusion 13 e formed on the side wall.
Further, in the state where the pedal arm 30 is urged by the return spring 40 and returned to the rest position, and the pin 33 is in contact with the first stopper 18a and no force is applied from the outside, as shown in FIG. The edge 32a of 30 (arm plate 32) is held in a non-contact state with a predetermined distance from the second stopper 18b.
Here, for example, about 0.5 mm is set as the predetermined interval so that the pedal arm 30 stops within an angle range allowed as a rest position when the pedal arm 30 stops.
[0021]
That is, in the returning operation in which the pedal arm 30 is urged by the urging force of the return spring 40 and returned to the rest position, for example, when the driver performs the returning operation slowly by gradually weakening the stepping force, the return impact force As shown in FIG. 6A, the pin 33 contacts only the first stopper 18a and stops.
On the other hand, when the driver suddenly releases the stepping force, the return impact force is large, and the pin 33 first comes into contact with the first stopper 18a as shown in FIG. 6A and elastically deforms the first stopper 18a. Then, as shown in FIG. 6B, the edge portion 32a is in contact with the second stopper 18b. In this process, impact force and the like are absorbed.
Thereafter, the first stopper 18a is elastically restored, the edge portion 32a is detached from the second stopper 18b, and stopped at a predetermined rest position.
As a result, the impact force is efficiently absorbed, and the pedal arm 30 is reliably and accurately stopped and positioned at the predetermined rest position.
[0022]
In addition, when the surface of the first stopper 18a is worn away due to deterioration over time, the second stopper 18b mainly takes a stopping action, and similarly, the pedal arm 30 is within an allowable angular range. The position is surely and accurately stopped at the rest position.
[0023]
Further, when the driver applies an unreasonable force in the reverse direction by hooking the toe on the back side of the accelerator pedal 35 with respect to the pedal arm 30 in the rest position as shown in FIG. As shown in FIG. 6 (b), the pin 33 elastically deforms the first stopper 18a and the edge 32a contacts the second stopper 18b, so that the first stopper 18a and the second stopper 18b are simultaneously opposite to each other. The pedal arm 30 is prevented from excessive movement by antagonizing this force. Thereby, the pedal arm 30 is reliably held at the rest position.
[0024]
The fully open stoppers 19 a and 19 b are formed integrally and firmly on the housing 10 and are positioned in a point-symmetrical position with respect to the pedal shaft 31.
When the pedal arm 30 stops at the maximum depressed position (fully opened position), if the pedaling force is not so large, the edge 32b comes into contact with the stopper 19a and stops. On the other hand, when the pedaling force exceeds a predetermined level, the edge 32b first contacts the stopper 19a, and then the edge 32c contacts the stopper 19b and stops.
Here, a predetermined gap (for example, about 0.5 mm) is formed between the edge portion 32c and the stopper 19b when the edge portion 19b contacts the stopper 19a.
As a result, even if an excessive pedaling force is applied, the pedal arm 30 is held by the stoppers 19a and 19b that are point-symmetric with respect to the pedal shaft 31, so that the pedal arm 30 rotates with the stopper 19a as a fulcrum. It is possible to prevent the displacement of the pedal shaft 31 and the displacement of components arranged around the pedal shaft 31.
[0025]
2 and 3, the hysteresis generating mechanism 50 is accommodated in the recess 13 of the housing 10, and is formed by a first slider 51, a second slider 52, a small diameter spring 53, a large diameter spring 54, and the like. Yes.
The first slider 51 is made of a highly slidable material such as oil-impregnated polyacetal, and includes a sliding surface 51a that slides on the wall surface 13a of the recess 13, an inclined surface 51b, a protrusion 51c that positions the small-diameter spring 53, and a seating surface. 51d and the like.
The second slider 52 is made of a highly slidable material such as oil-impregnated polyacetal, and includes a sliding surface 52 a that slides on the wall surface 13 b of the recess 13, an inclined surface 52 b, a protrusion 52 c that positions the large-diameter spring 54, and a seat. It has a surface 52d and the like.
One end of each of the small-diameter spring 53 and the large-diameter spring 54 is in contact with the seat surfaces 51 d and 52 d of the first slider 51 and the second slider 52, and the other end thereof is a seat surface 13 c formed on the wall surface of the recess 13. , 13d.
[0026]
That is, when the pedal arm 30 is depressed, the pin 33 pushes the first slider 51 leftward in FIG. 3 against the urging force of the small-diameter spring 53 and the large-diameter spring 54, so that the inclined surface 51b. , 52b by the wedge action, the sliding surfaces 51a, 52a move while being pressed against the wall surfaces 13a, 13b, respectively, thereby generating a frictional force.
In the case of the return operation of the pedal arm 30, the first slider 51 and the second slider 52 are returned to their original positions by the biasing force of the small diameter spring 53 and the large diameter spring 54. Produces less frictional force.
When these frictional forces are adjusted with respect to the urging force of the return spring 40, a hysteresis load is generated in the pedaling force.
[0027]
As shown in FIGS. 2 and 3, the magnetic sensor 60 includes a rotor 61 that rotates integrally with the pedal arm 30, a first stator 62 and a second stator 63 embedded in the cylindrical portion 22 of the cover 20, 1 is formed by a Hall element 64 or the like embedded between the stator 62 and the second stator 63, and other related components include a terminal 65 exposed in the connector 25 and various electronic components embedded in the cover 20. A mounted circuit board (not shown) and the like are provided.
[0028]
As shown in FIGS. 2 and 3, the rotor 61 is formed to face the first stator 62 through a fan-shaped opening 32e formed in the arm plate 32, and includes an arcuate armature 61a and a permanent magnet piece 61b. keeping.
As shown in FIG. 2, the permanent magnet piece 61 b is formed to rotate in a non-contact state with a predetermined distance from the first stator 62. As shown in FIG. 2, the second stator 63 is disposed in a non-contact state with a predetermined distance from the pedal shaft 31. Accordingly, when the rotor 61 (permanent magnet piece 61b) rotates, the magnetic flux density passing between the first stator 62 and the second stator 63 changes, and this change is detected by the Hall element 64 to detect the voltage signal. Output as. As a result, the angular position of the pedal arm 30 is detected.
[0029]
Further, as shown in FIG. 2, an outer magnetic shielding plate 81 is fixed to the surface of the cover 20, and a cylindrical magnetic shielding plate 82 is fixed to the annular groove 24 formed inside the cover 20 by fitting. Yes. As described above, since the outer magnetic shielding plate 81 and the cylindrical magnetic shielding plate 82 are provided so as to surround the outer peripheral region of the magnetic sensor 60, a disturbance magnetic field entering from the outside can be blocked. Furthermore, since the arm plate 32 of the pedal arm 30 is also made of a magnetic material, a disturbance magnetic field entering from the left side in FIG. 2 can be blocked.
[0030]
In the above embodiment, the pause stopper 18 including the first stopper 18a and the second stopper 18b is shown as being attached after being formed separately from the housing 10, but is not limited thereto. What was integrally molded in the housing 10 may be adopted.
In addition, the pause stopper 18 formed integrally as the first stopper 18a and the second stopper 18b is shown. However, the present invention is not limited to this, and a separately formed stopper is attached to the housing 10. Also good.
[0031]
Moreover, in the said embodiment, although the pin 33 and the edge part 32a were employ | adopted as a part of the pedal arm 30 contact | abutted to the 1st stopper 18a and the 2nd stopper 18b, it is not limited to this, The part may be divided into two stages to contact the first stopper and the second stopper, or the edge part 32a may be divided into two stages to contact the first stopper and the second stopper. Alternatively, the first stopper and the second stopper may be provided at positions separated from each other, and the portions of the pedal arm 30 located at positions separated from each other may be brought into contact with each other.
Further, in the above embodiment, the first stopper 18a has a shape that is more easily elastically deformed than the second stopper 18b. However, the present invention is not limited to this, and the first stopper is formed of a material that is easily elastically deformed. May be.
[0032]
【The invention's effect】
As described above, according to the accelerator pedal device of the present invention, as the stop stopper for stopping the pedal arm at the stop position, the first stopper that is elastically deformable and first contacts the pedal arm and the first stopper are applied. By providing a second stopper with which the pedal arm can come into contact after contact, it is possible to prevent a collision sound even when the pedal arm is suddenly returned, and even when an excessive force is applied, the pedal The arm can be reliably stopped at the rest position.
In particular, by integrally forming the first stopper and the second stopper from a resin material, handling, manufacturing, assembly, molding, selection of materials, and the like of the pause stopper are facilitated. In addition, by forming the first stopper in a shape that is more easily elastically deformed than the second stopper, it is possible to easily achieve both the impact force mitigating action and the resting position positioning action. Furthermore, by forming the second stopper in a flat shape and the first stopper projecting from the second stopper, the first stopper can have a stopping action and an impact force mitigating action with a simple structure. Can mainly have a stopping action.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an accelerator pedal device according to the present invention.
FIG. 2 is a cross-sectional view showing an internal structure of an accelerator pedal device.
FIG. 3 is a cross-sectional view showing an internal structure of the accelerator pedal device.
FIG. 4 is a side view showing a pedal arm and a return spring.
5A and 5B show a stop stopper, in which FIG. 5A is a perspective view, and FIG. 5B is a cross-sectional view taken along line EE in FIG. 5A.
6A and 6B are side views for explaining the operation of the stop stopper when the pedal arm is stopped at the stop position. FIG. 6A is a side view showing a state in which the pedal arm is in contact with the first stopper. FIG. 5 is a side view showing a state where the pedal arm is in contact with the first stopper and the second stopper.
[Explanation of symbols]
10 Housing (main body)
11 Bearing hole 13 Concave part 13e Fitting convex part 18 Rest stopper 18a First stopper 18b Second stopper 18c Fitting concave parts 19a, 19b Fully open stopper 20 Cover (main body)
21 Bearing hole 30 Pedal arm 31 Pedal shaft 32 Arm plate 32a Edge 33 Pin 34 Arm rod 35 Accelerator pedal 40 Return spring 50 Hysteresis generating mechanism 60 Magnetic sensor

Claims (5)

A pedal arm having an accelerator pedal for applying a pedaling force, a main body that swingably supports the pedal arm, a return spring that urges the pedal arm to return to a rest position, and stops the pedal arm at a rest position. An accelerator pedal device comprising a pause stopper provided on the main body,
The pedal arm has a first contact portion and a second contact portion provided at different positions in the return direction to the rest position,
The rest stop includes a first stopper and said first contact portion is elastically deformable contacts first person, the second person after the first contact portion is elastically deformed in contact with the first stopper A second stopper with which the contact portion can contact ,
An accelerator pedal device characterized by that. The first stopper and the second stopper are integrally formed of a resin material and fixed to the main body.
The accelerator pedal device according to claim 1. The first stopper is formed in a shape that is more easily elastically deformed than the second stopper.
The accelerator pedal device according to claim 1 or 2, wherein The second stopper is formed in a flat shape, and the first stopper is formed in a convex shape protruding from the second stopper.
The accelerator pedal device according to any one of claims 1 to 3, wherein the accelerator pedal device is provided. The first contact portion is a pin fixed to an arm plate that defines a pedal arm;
The second contact portion is an edge of the arm plate;
The accelerator pedal device according to any one of claims 1 to 4, wherein

Images