JP4374181B2 - 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.
[0003]
The position sensor is arranged around the center of swing of the accelerator pedal (pedal arm), and a signal corresponding to the angular position of the accelerator pedal (pedal arm) between the rest position and the fully opened position. Is output.
One stop stopper for stopping the accelerator pedal (pedal arm) at the stop position is provided in the main body of the apparatus, and one fully open stopper for stopping the accelerator pedal (pedal arm) at the fully open position is provided on the vehicle body side or It is provided in the main body of the apparatus (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
[0004]
[Patent Document 1]
JP 2000-326754 A [Patent Document 2]
JP 2001-180326 A [Patent Document 3]
Japanese Patent Application Laid-Open No. 2002-238772
[Problems to be solved by the invention]
By the way, in the above-described conventional device, in the configuration in which the fully open stopper is provided on the vehicle body side, it is not easy to position the fully open position due to variations in the mounting position of the device, and the fully open stopper is integrated with the device from the viewpoint of modularization. It is desirable to provide it.
However, in the configuration in which one fully open stopper is provided in the device, when an excessive pedaling force is applied to the accelerator pedal (pedal arm), the pedal shaft that is the pivot center of the accelerator pedal (pedal arm) with the fully open stopper as a fulcrum Alternatively, a load is applied to the bearing hole, and there is a possibility that a misalignment of the pedal shaft, a deformation of the bearing hole, or a detection failure due to a misalignment of the position sensor provided around the pedal shaft, and further a deformation, a breakage, etc.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to reliably stop an accelerator pedal (pedal arm) at a predetermined fully open position, and to apply an excessive pedaling force. It is another object of the present invention to provide an accelerator pedal device that can prevent an axial shift and the like and prevent a position sensor from being damaged by preventing an excessive force from being applied around a bearing of an accelerator pedal (pedal arm).
[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 comprising: a fully open stopper for stopping at a fully opened position where the pedal is fully depressed, wherein the fully open stopper is provided on the main body, and a first stopper with which a part of the pedal arm abuts, and a pedal arm And a second stopper which is substantially point-symmetric with the first stopper and is disposed at an equal distance from the center of swinging and with which the other part of the pedal arm can come into contact.
[0008]
According to this configuration, when the pedal arm is depressed with an excessive pedal force and reaches the fully open position, the first stopper is disposed symmetrically with respect to the swing center and at an equal distance from the swing center. And the second stopper come into contact with each other to stop the pedal arm. At this time, the reaction force in the first stopper and the reaction force in the second stopper act in directions that cancel each other, so that an unreasonable force is not applied to the pedal shaft at the swing center, Deformation of the bearing hole is prevented. Therefore, even when an excessive pedaling force is applied, the pedal arm is stopped and positioned at a predetermined fully open position.
[0009]
In the above configuration, the pedal arm includes a rod-shaped arm rod that holds the accelerator pedal, and a plate-shaped arm plate that is coupled to the arm rod and is flat in the swinging direction, and the fully open stopper is in the swinging direction of the arm plate. The structure formed so that it may contact | abut with the edge part located in both sides of this can be employ | adopted.
According to this configuration, the plate-like arm plate has a large second-order moment (section modulus) in the swinging direction and is not easily deformed by an excessive load, while the arm rod has a second-order cross-section compared to the arm plate. Since the moment (section modulus) is small, the structure is easily deformed.
Therefore, when an excessive pedaling force is applied, the arm rod elastically deforms and absorbs the load, while the arm plate firmly maintains the initial shape even in the fully open position, and the second stopper and the second stopper. Positioned in contact with the stopper.
[0010]
In the configuration described above, the first stopper and the second stopper are in contact with the pedal arm only when a pedaling force of a predetermined level or less is applied, and both are in contact with the pedal arm when a pedaling force exceeding a predetermined level is applied. The structure formed so that it may contact | connect can be employ | adopted.
According to this configuration, in the initial setting, since only one of the first stopper and the second stopper can be assembled so as to come into contact with the pedal arm, processing accuracy and assembly accuracy are not required so much, and management costs and manufacturing costs are reduced. it can. On the other hand, when an excessive pedaling force exceeding a predetermined level is applied, both the first stopper and the second stopper come into contact with each other to cancel each other's reaction force. It is surely stopped and positioned.
[0011]
In the above configuration, it is possible to employ a configuration in which a position sensor for detecting the angular position of the pedal arm is provided, and this position sensor is arranged around the swing center of the pedal arm.
According to this structure, the pedal shaft located at the center of swinging of the pedal arm is prevented from being displaced, so that displacement, deformation, breakage, etc. of the position sensor disposed around the pedal shaft are also prevented. The position is detected with high accuracy.
[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. The arm plate 32 is fixed to the upper end of the arm plate 32 and protrudes in the horizontal direction. The arm rod 34 is fixed to the lower end of the arm plate 32. The accelerator pedal 35 is attached to the arm rod 34. Yes.
[0017]
Here, as shown in FIGS. 2 and 3, the arm plate 32 is formed in a flat plate shape in the swinging direction. Therefore, the cross-sectional secondary moment (section modulus) in the swing direction is large, and the shape is difficult to elastically deform.
On the other hand, since the cross section of the arm rod 34 is formed in a relatively small circular shape, the cross sectional secondary moment (sectional modulus) in the swinging direction is small, and the arm rod 34 has a shape that is more easily elastically deformed than the arm plate 32. Yes.
[0018]
That is, when an excessive pedaling force is applied to the pedal arm 30, the arm plate 32 maintains the initial shape, while the arm rod 34 is elastically deformed to absorb the pedaling force and release the pedaling force. The rod 34 returns to its original shape by elastic return.
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.
[0019]
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.
[0020]
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). .
[0021]
As shown in FIGS. 3 and 4, the pause stopper 18 is integrally formed of a resin material so as to have a stopper 18 a and a stopper 18 b. Here, the resin material is appropriately selected in consideration of impact absorption characteristics and the like.
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.
[0022]
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 stopper 18a and no force is applied from the outside, as shown in FIG. The edge 32a of the arm plate 32) is held in a non-contact state with a predetermined distance from the 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.
[0023]
As shown in FIG. 3, the fully open stoppers 19 a and 19 b are integrally and firmly formed in the housing 10, and are disposed at point symmetrical positions with respect to the axis C of the pedal shaft 31 (the swing center of the pedal arm 30). The first stopper 19a and the second stopper 19b are formed.
As shown in FIGS. 3 and 5, the first stopper 19 a and the second stopper 19 b are configured so that only the first stopper 19 a (one) is used as a part of the arm plate 32 when the pedaling force is below a predetermined level. The second stopper 19b is in a non-contact state with a predetermined distance from the pedal arm 30 (the edge 32c as the other part of the arm plate 32), and the pedaling force exceeds a predetermined level. In this case, as shown in FIG. 6, both the first stopper 19a and the second stopper 19b are formed so as to contact the pedal arm 30 (the edge 32b and the edge 32c of the arm plate 32).
Here, the distance between the edge 32c and the second stopper 19b when the second stopper 19b is in a non-contact state is formed to be, for example, about 0.5 mm in the initial setting state.
[0024]
That is, when the pedal arm 30 is depressed to the maximum and stops at the fully open position, if the pedaling force is below a predetermined level and is not so large, as shown in FIG. It stops in contact with 19a.
On the other hand, when the pedaling force exceeds a predetermined level, the edge portion 32b of the arm plate 32 first comes into contact with the first stopper 19a as shown in FIG. Stops in contact with the second stopper 19b.
[0025]
In this state, as shown in FIG. 6, the reaction force F of the first stopper 19 a and the reaction force F of the second stopper 19 b are opposite to each other and at an equal distance L from the axis C. 32. That is, the reaction force F exerted by the first stopper 19a and the second stopper 19b cancels each other around the axis C. As a result, the pedal shaft 31 and the bearing holes 11 and 21 have one stopper as a fulcrum. Deformation load does not act.
[0026]
Further, since the arm plate 32 is not easily elastically deformed and the arm rod 34 is formed to be easily elastically deformed, when an excessive pedaling force is applied, the arm rod 34 is elastically deformed to absorb the load and The plate 32 firmly maintains the initial shape, and the pedal shaft 31 is also held at the initial position.
Thus, even if an excessive pedaling force exceeding a predetermined level is applied, the pedal arm 30 is stopped and positioned at the predetermined fully opened position without applying an excessive force to the pedal shaft 31. Misalignment, deformation of the bearing holes 11 and 21 and the like can be prevented, and misalignment (alignment misalignment) of the components arranged around the pedal shaft 31, particularly the magnetic sensor 60, can be prevented.
[0027]
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.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
In the above embodiment, the first stopper 19a and the second stopper 19b as the fully open stopper are formed integrally with the housing 10, but are not limited to this, and are formed separately. A thing may be retrofitted to the housing 10.
[0033]
In the above embodiment, the first stopper 19a and the second stopper 19b are configured such that only the first stopper 19a abuts when the pedaling force is equal to or lower than a predetermined level. You may employ | adopt the structure which abuts. Furthermore, in the above-described embodiment, in the case of a pedaling force of a predetermined level or less, only one of the first stopper 19a and the second stopper 19b is in contact. However, the present invention is not limited to this, and the assembly is not limited to this. A configuration in which the first stopper 19a and the second stopper 19b are in contact with each other at the same time may be adopted as long as the control man-hours for accuracy and machining accuracy allow.
[0034]
Further, in the above embodiment, the pedal arm 30 includes an arm rod 34 that holds the accelerator pedal 35 and a plate-like arm plate 32 that is coupled to the arm rod 34 and is flat in the swinging direction. However, the present invention is not limited to this, and the pedal arm may be integrally formed only by a flat plate-like arm plate, and a metal or a resin material may be adopted as the material thereof.
[0035]
【The invention's effect】
As described above, according to the accelerator pedal device of the present invention, as a fully open stopper that stops the pedal arm at the fully open position where the pedal arm is fully depressed, the first stopper that is provided on the main body and that a part of the pedal arm contacts, By adopting a second stopper that is arranged at a point substantially symmetrical with the first stopper with respect to the swing center of the pedal arm and that can be brought into contact with the other part of the pedal arm, particularly when the pedal arm is depressed with excessive pedaling force. Therefore, it is possible to prevent an excessive force from being applied to the pedal shaft at the center of swinging, and to prevent displacement of the pedal shaft, deformation of the bearing hole, and the like. Therefore, it is possible to prevent displacement, deformation, breakage, and the like of the position sensor and the like disposed around the position sensor.
[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.
FIG. 5 is a side view showing a state in which the pedal arm is in contact with the first stopper in the fully open position.
FIG. 6 is a side view showing a state in which the pedal arm is in contact with the first stopper and the second stopper in the fully open position.
[Explanation of symbols]
10 Housing (main body)
11 Bearing hole 18 Pause stopper 19a First stopper (fully open stopper)
19b Second stopper (fully open stopper)
20 Cover (main body)
21 Bearing hole 30 Pedal arm 31 Pedal shaft C Center axis (swing center)
32 Arm plate 32b Edge (part of pedal arm)
32c Edge (other part of pedal arm)
33 Pin 34 Arm rod 35 Accelerator pedal 40 Return spring 50 Hysteresis generating mechanism 60 Magnetic sensor 61 Rotor 62 First stator 63 Second stator 64 Hall element

Claims (4)

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 a fully opened position where the pedal arm is fully depressed. An accelerator pedal device comprising a fully open stopper that stops at a position,
The fully open stopper is provided on the main body, and a first stopper with which a part of the pedal arm abuts, is substantially point symmetric with the first stopper with respect to the swing center of the pedal arm , and the swing A second stopper disposed at a position equidistant from the center and capable of abutting against the other part of the pedal arm,
An accelerator pedal device characterized by that. The pedal arm includes a rod-shaped arm rod that holds the accelerator pedal, and a plate-shaped arm plate that is coupled to the arm rod and is flat in a swinging direction,
The fully open stopper is formed so as to abut on edge portions located on both sides of the swing direction of the arm plate.
The accelerator pedal device according to claim 1. Only one of the first stopper and the second stopper contacts the pedal arm when a pedaling force of a predetermined level or less is applied, and both contact the pedal arm when a pedaling force exceeding a predetermined level is applied. Is formed as
The accelerator pedal device according to claim 1 or 2, wherein A position sensor for detecting an angular position of the pedal arm;
The position sensor is disposed around the swing center of the pedal arm,
The accelerator pedal device according to any one of claims 1 to 3, wherein the accelerator pedal device is provided.

Images