JP2011110964A - Accelerator pedal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accelerator pedal device which achieves temporary assembling of a pedal part and a rotor without enlarging the pedal part and the rotor. <P>SOLUTION: A recessed part 423 is provided in a protruding part 422 on the outer circumference of a pedal shaft 42. A circumferential edge part 434, which protrudes over the entire circumference in a diameter inward direction, is provided on the inner circumference of a center hole 433 of a rotor 43. In a temporarily assembled state, a flat surface 431b of a rotor side inclined plate part 431 is disposed close to a pedal side bottom surface 412a. A pedal side inclined plate part 411 is structured with a low-base part 413 having a low degree of protrusion to the rotor 43 side and a high-base part 414 having a highly inclined surface 414a having a high degree of protrusion to the rotor side 43. When the engagement of the pedal part 41 with the rotor 43 is liberated, the rotor side inclined part 431 is disposed close to the low-base part 413 by making an inclined surface 431a ride over the low-case part 413 and contact the highly inclined surface 414a. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an accelerator pedal device.

  2. Description of the Related Art Conventionally, an accelerator pedal device that controls a throttle opening according to the amount of depression by a driver is known. Some accelerator pedal devices are provided with a pedaling force hysteresis mechanism that varies the pedaling force required for stepping on when the stepping amount is increased and when the stepping amount is decreased, in order to obtain a more comfortable accelerator operation.

  As an example of this type of accelerator pedal device, inside the housing, there is a pedal portion that rotates by a pedal force, a rotor that rotates coaxially with the pedal portion and is biased to the opposite side of the pedal portion by the pedal force. (For example, refer to Patent Document 1). In this apparatus, a swash plate portion having a slope is provided on each facing surface of the pedal portion and the rotor. Thus, when the pedal is depressed, an axial separation force is generated by the action of the swash plate portions, and the frictional force is increased via the friction plate.

JP 2008-195225 A

  By the way, in the said patent document 1, a pedal part and a rotor are temporarily assembled first, these are accommodated together in a housing, and are pivotally supported, Then, the urging | biasing force by a return spring is given to a rotor, Pedal part Assembling to the housing is performed by the procedure of releasing the rotor.

  At this time, as shown in FIG. 1 of Patent Document 1, the swash plate portion has a wedge-shaped portion, and the pedal portion and the rotor are bitten in the rotational direction to realize temporary assembly.

  However, in this case, in order to perform sufficient temporary assembly, there is a possibility that the size of the swash plate portion having the wedge-shaped portion is increased. For this reason, there is a possibility that the diameters of the pedal portion and the rotor may be increased, and as a result, the height of the housing that accommodates the pedal portion and the rotor may be increased. If the height of the housing is increased, there may be a problem that the driver's toe hits the housing during pedal operation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an accelerator pedal device that realizes a temporary assembly of the pedal portion and the rotor without increasing the diameter of the pedal portion and the rotor. It is to provide.

In order to achieve the above object, the accelerator pedal device according to claim 1 includes a housing, a pedal portion, and a rotor.
The housing is attached to the vehicle body. The pedal portion is accommodated and supported by the housing so as to be rotatable by a support shaft. Thereby, a pedal part rotates with a driver | operator's treading force.
The rotor is supported coaxially with the pedal portion and is disposed so as to face the pedal portion. This rotor is biased in the direction opposite to the direction of rotation of the pedal portion by the pedal effort.

  Here, on the rotor side surface of the pedal portion, a plurality of pedal side swash plate portions that protrude toward the rotor side and have a pedal slope are formed in the circumferential direction. On the other hand, on the surface of the rotor on the pedal portion side, a plurality of rotor-side swash plate portions having a rotor slope that protrudes toward the pedal portion and can be brought into contact with the pedal slope is formed in the circumferential direction. As a result, the pedal-side swash plate portion and the rotor-side swash plate portion are configured such that a force for separating the pedal portion and the rotor in the direction of the support shaft is applied by bringing the inclined surfaces into contact with each other.

  In the present invention, in particular, one of the pedal portion and the rotor has a shaft portion that passes through the other central hole, and a fitting portion provided on the outer periphery of the shaft portion and a fitted portion provided on the inner periphery of the central hole. By being fitted with the part, it is configured to be temporarily assembled.

  If it was attempted to temporarily assemble by biting in the rotational direction as in the prior art, it was necessary to make part of the swash plate portion a wedge shape or the like. For this reason, the physique of the swash plate part was large. On the other hand, in the present invention, paying attention to one of the pedal portion and the rotor having a shaft portion that passes through the other central hole, a fitting portion is provided on the outer periphery of the shaft portion, and the inner periphery of the central hole is provided. A fitted portion was provided. Thereby, since both are temporarily assembled by making it adjoin to a support axis direction, the physique of a pedal side swash plate part and a rotor side swash plate part does not become large. As a result, the diameter of the pedal portion and the rotor does not increase, and the height of the housing can be reduced, so that the problem that the driver's toe hits the housing during pedal operation is also eliminated.

  By the way, in the temporarily assembled state, as shown in claim 2, the rotor-side swash plate portion is accommodated in the accommodation space formed by the pedal-side swash plate portion and the surface of the pedal portion that are adjacent in the circumferential direction. It is conceivable to do so. In this case, it is preferable that the pedal surface and the rotor-side swash plate portion constituting the housing space are arranged close to each other.

  Since the height of the rotor-side swash plate portion is almost determined by the relationship with the pedal-side swash plate portion, if the pedal portion surface and the rotor-side swash plate portion are arranged close to each other, the axial thickness of the pedal portion is increased. can do. Thereby, the intensity | strength of a pedal part can be enlarged.

  Note that the “proximity arrangement” includes a contact state. Further, considering that the relationship between the pedal portion and the rotor is relative, “in the temporarily assembled state, the rotor side swash plate portion adjacent in the circumferential direction and the surface of the rotor are formed. The pedal-side swash plate portion may be accommodated in the accommodation space, and the surface of the rotor and the pedal-side swash plate portion constituting the accommodation space may be disposed close to each other.

  By the way, specifically, the pedal side swash plate portion includes, as shown in claim 3, a low base portion having a small degree of protrusion toward the rotor side, and a high base portion having a large degree of protrusion toward the rotor side and having a pedal slope. It can be considered that At this time, when the fitting between the pedal portion and the rotor is released, the rotor-side swash plate portion gets over the low base portion, abuts the rotor inclined surface against the pedal inclined surface, and is disposed close to the low base portion.

  Thus, if the pedal-side swash plate portion has a low base portion, the low base portion becomes thick, so that the strength of the pedal portion can be further increased. In addition, since the rotor side swash plate portion is arranged close to the low base portion, the rotor side swash plate portion contacts the low base portion even when an axial force is applied to the pedal in the released state. Thus, the displacement of the pedal in the axial direction can be regulated.

  Note that the “proximity arrangement” includes a contact state. Further, considering that the relationship between the pedal portion and the rotor is relative, “the rotor-side swash plate portion has a low base portion with a small degree of protrusion toward the pedal portion side and the rotor side. The degree of protrusion is composed of a high base part having the rotor slope, and when the fitting between the pedal part and the rotor is released, the pedal side swash plate part gets over the low base part and The pedal slope may be brought into contact with the rotor slope and disposed close to the low platform portion.

  By the way, about the fitting part and the to-be-fitted part which produce a temporary assembly state, as shown in Claim 4, it is possible to provide multiple places at least one among a fitting part and a to-be-fitted part. For example, three locations are provided at intervals of 120 degrees on the outer periphery or inner periphery. Moreover, as shown in Claim 5, it is possible to provide at least one of a fitting part and a to-be-fitted part as a peripheral part over the perimeter. Either configuration contributes to the realization of a reliable temporary assembly.

It is a top view which shows the accelerator pedal apparatus of one Embodiment. It is a side view which shows the structure of a pedal unit. It is the schematic diagram which notched a part of accelerator pedal apparatus of one Embodiment. It is the sectional view on the AA line of FIG. 2, (a) shows a temporary assembly state, (b) shows a release state. It is explanatory drawing which shows mesh | engagement with a pedal part and a rotor, (a) shows a temporary assembly state, (b) shows a release state.

An embodiment of the present invention will be described with reference to the drawings.
The accelerator pedal device according to the present embodiment is used by being mounted on a vehicle, detects the stepping amount of the driver as rotation angle information around the rotation shaft, and transmits the detected information to the engine ECU. Thus, the engine ECU instructs the throttle device to open and close the throttle valve.

  As shown in FIG. 1, the accelerator pedal device 1 includes a housing 10 and a pedal unit 20.

  The housing 10 is made of resin and has a box shape. The housing 10 includes a bottom plate 11, two side plates 12 and 13 erected on both ends of the bottom plate 11, and a top plate 14 that connects the side plates 12 and 13 at an upper end portion and faces the bottom plate 11.

  The bottom plate 11 has three attachment holes 111 at the edge thereof. Thereby, the baseplate 11 is attached to the inner wall surface of a vehicle front part. Therefore, the height of the housing 10 is defined as the distance from the bottom plate 11 to the top plate 14. A sensor cover 121 is attached to one side plate 12. The sensor cover 121 covers a Hall IC that detects the rotation angle of the pedal unit 20 and a magnetic body (not shown). A signal from the Hall IC is sent to the engine ECU via a connector 122 provided at the tip of the sensor cover 121. A resin cover 133 that protects the support shaft is attached to the other side plate 13. The top plate 14 has a concavo-convex portion on its outer surface, and is devised to increase the strength.

  The pedal unit 20 includes a pedal 21 that receives a driver's pedaling force, a rod-shaped arm portion 22, and a base portion 23. The pedal 21 is made of resin, and one end of an arm portion 22 is connected to the pedal 21. The arm part 22 is made of metal such as iron, and the other end is bent at a substantially right angle. The other end is connected to the base 23.

Next, the base 23 will be described in detail.
As shown in FIG. 2, the base portion 23 has a fitting portion 30 and a rotating portion 40.
A fitting hole 31 is formed in the fitting part 30, and the other end of the arm part 22 bent at a substantially right angle is fitted.

  On the other hand, the rotating portion 40 is made of a resin having a substantially circular pedal portion 41, a cylindrical pedal shaft 42 that is integrally formed so as to protrude from the pedal portion 41, and through which a support shaft passes, and through which the pedal shaft 42 is inserted. An annular rotor 43 is provided. The rotor 43 is provided with an engaging portion 435 that protrudes to the opposite side of the fitting portion 30. A biasing force from a return spring (not shown) acts on the engaging portion 435.

  A support shaft is inserted into the pedal shaft 42, and the support shaft is supported by the housing 10. Thus, when a pedaling force is applied to the pedal 21, the base 23 rotates about the rotation axis O (see FIG. 1).

  FIG. 3 is a view in which the top plate 14 is cut away and the contact state between the pedal portion 41 and the rotor 43 is viewed from the radially outward direction. As shown in FIG. 3, the pedal portion 41 and the rotor 43 that are supported coaxially have a plurality of swash plate portions 411 and 431 on opposing surfaces. The swash plate portions 411 and 431 are arranged side by side in the circumferential direction around the rotation axis O. That is, the swash plate portion 411 (hereinafter referred to as “pedal side swash plate portion”) 411 of the pedal portion 41 is disposed on the surface of the substantially circular pedal portion 41 on the rotor 43 side at equal intervals in the circumferential direction. Further, swash plate portions (hereinafter referred to as “rotor side swash plate portions”) 431 of the rotor 43 are arranged on the surface of the annular rotor 43 on the pedal portion 41 side at equal intervals in the circumferential direction.

  With this configuration, when the base portion 23 rotates about the rotation axis O, the pedal portion 41 and the rotor 43 rotate together. At this time, the urging force from the return spring acts on the rotor 43 in the direction opposite to the rotation direction of the pedal portion 41 due to the pedal effort. Thereby, when the pedal part 41 is rotated by a pedaling force, the rotor 43 receives an axial load in a direction away from the pedal part 41 because the contact surfaces of the swash plate parts 411 and 431 are inclined. As a result, a frictional force is generated between the side plates 12 and 13 via a friction plate (not shown), and a so-called pedal force hysteresis mechanism is realized.

  By the way, when assembling the accelerator pedal device 1, the pedal unit 20 shown in FIG. 2 is assembled to the housing 10. Specifically, the pedal unit 41 of the rotating unit 40 of the pedal unit 20 and the rotor 43 are inserted into the housing 10 in a temporarily assembled state so as not to relatively rotate. Next, the support shaft and the friction plate are assembled to the housing 10, and then the return spring is assembled to transmit the reaction force of the elastically deformed return spring to the rotor 43. Thus, the rotor 43 is released from the temporarily assembled pedal portion 41.

Next, the “temporary assembly state” and the “release state” between the pedal portion 41 and the rotor 43 will be described.
4A and 4B are explanatory views schematically showing a cross section taken along line AA of FIG. FIG. 4A shows a temporarily assembled state. FIG. 4B shows a released state.

  The pedal shaft 42 is provided with three protruding portions 422 protruding outward in the radial direction at equal intervals (see FIG. 2). As shown in FIGS. 4A and 4B, a concave portion 423 is formed in the protruding portion 422. The pedal shaft 42 is inserted through the central hole 433 of the rotor 43. The central hole 433 is formed with a peripheral edge portion 434 that protrudes in the radially inward direction over the entire circumference. Thereby, by pressing the rotor 43 toward the pedal portion 41 side, the pedal portion 41 and the rotor 43 are temporarily assembled as shown in FIG. On the other hand, when the reaction force of the return spring is transmitted to the rotor 43 as described above, the rotor 43 is released from the pedal portion 41. This is as shown in FIG.

  FIGS. 5A and 5B are schematic explanatory views of the degree of meshing between the pedal portion 41 and the rotor 43 as viewed from the radially outward direction. FIG. 5A shows a temporarily assembled state. FIG. 5B shows a released state.

  As shown in FIGS. 5A and 5B, the pedal-side swash plate portion 411 includes a low base portion 413 that is continuous with the bottom portion 412 and forms a step with the bottom portion 412, and a step difference with the low base portion 413. The hill part 414 which forms is provided. The low base part 413 has a low slope 413a continuous with the bottom face 412a of the bottom part 412 and a low flat face 413b following the low slope 413a. The hill portion 414 has a high slope 414a continuous with the low flat surface 413b and a high flat surface 414b continuous with the high flat surface 414a.

  On the other hand, the rotor-side swash plate portion 431 has an inclined surface 431a continuous with the bottom surface 432a of the bottom portion 432, and a flat surface 431b continuous with the inclined surface 431a. The slope 431a is inclined so as to face the above-described low slope 413a and high slope 414a on the pedal portion 41 side.

  At this time, in the temporarily assembled state, as shown in FIG. 5A, the high flat surface 414b of the hill portion 414 and the bottom portion 432 on the rotor side come into contact with each other, and the flat surface 431b of the rotor side swash plate 431 is on the pedal side. Is disposed close to the bottom surface 412a. Thereby, when it inserts in the housing 10 in a temporarily assembled state, a clearance is formed between the side plates 12 (see arrow C in FIG. 5A). As a result, the base 23 of the pedal unit 20 can be easily inserted into the housing 10 and assembled.

  As described above, when the reaction force of the return spring is transmitted to the rotor 43, the rotor 43 is released from the pedal portion 41. At this time, the rotor 43 is indicated by an arrow R in FIGS. 5 (a) and 5 (b). A reaction force in the direction shown acts. As a result, the rotor-side swash plate portion 431 gets over the pedal-side low base portion 413 and makes the slope 431 a contact the high slope 414 a of the high base portion 414. The rotor 43 moves to the side plate 12 side by the clearance described above (see arrow C in FIG. 5A) and is locked in a state of being separated from the pedal portion 41.

  The housing 10 in this embodiment constitutes a “housing” in the claims, the pedal portion 41 constitutes a “pedal portion”, and the rotor 43 constitutes a “rotor”. Further, the pedal side swash plate portion 411 constitutes a “pedal side swash plate portion”, the high slope 414a constitutes a “pedal slope”, the rotor side swash plate portion 431 constitutes a “rotor side swash plate portion”, The slope 431a constitutes a “rotor slope”. Further, the central hole 433 of the rotor 43 constitutes a “central hole”, the pedal shaft 42 constitutes a “shaft portion”, the concave portion 423 constitutes a “fitting portion”, and the peripheral edge portion 434 is a “fitted portion” Is configured. Further, the bottom surface 412a on the pedal portion 41 side constitutes a “pedal portion surface”, the low base portion 413 constitutes a “low base portion”, and the high base portion 414 constitutes a “high base portion”.

Next, the effect which the accelerator pedal apparatus 1 of this form exhibits is demonstrated.
In the accelerator pedal device 1 of the present embodiment, a recess 423 is provided in the protrusion 422 on the outer periphery of the pedal shaft 42, and a peripheral edge 434 that protrudes in the radially inward direction is provided on the inner periphery of the central hole 433 of the rotor 43 ( (See FIG. 4). Thereby, since both 41 and 43 are temporarily assembled by making it adjoin to a support axis direction, the physique of the pedal side swash plate part 411 and the rotor side swash plate part 431 does not become large. As a result, the diameters of the pedal portion 41 and the rotor 43 do not increase, and the height of the housing 10 can be reduced, so that the problem that the driver's toe hits the housing 10 during pedal operation is eliminated.

  Further, in this embodiment, in the temporarily assembled state, as shown in FIG. 5A, the flat surface 431b of the rotor-side swash plate portion 431 is disposed close to the pedal-side bottom surface 412a. Since the height of the rotor-side swash plate portion 431 is substantially determined by the relationship with the pedal-side swash plate portion 411, if the bottom surface 412 a of the pedal portion 41 and the rotor-side swash plate portion 431 are disposed close to each other, The axial thickness can be increased. Thereby, the intensity | strength of the pedal part 41 can be enlarged.

  Furthermore, in this embodiment, the pedal-side swash plate portion 411 is composed of a low base portion 413 having a small degree of protrusion toward the rotor 43 side and a high base portion 414 having a high degree of protrusion toward the rotor 43 side and having a high slope 414a. Has been. Further, when the fitting between the pedal portion 41 and the rotor 43 is released, the rotor-side swash plate portion 431 gets over the low base portion 413, makes the inclined surface 431 a abut on the high inclined surface 414 a, and approaches the low base portion 413. Be placed. Thereby, since the part of the low stand part 413 becomes thick, the intensity | strength of the pedal part 41 can be enlarged more. Moreover, even when the axial force is applied to the pedal unit 20 in the released state by arranging the rotor-side swash plate portion 431 in proximity to the low platform portion 413 (see symbol F in FIG. 3). The rotor-side swash plate portion 431 abuts on the low base portion 413 (see symbol T in FIG. 3), so that deviation in the axial direction can be restricted.

  Further, in this embodiment, the pedal shaft 42 is provided with three protruding portions 422 protruding outward in the radial direction at equal intervals (see FIG. 2). As shown in FIGS. 4A and 4B, a concave portion 423 is formed in the protruding portion 422. On the other hand, the central hole 433 of the rotor 43 is formed with a peripheral edge 434 that protrudes in the radially inward direction over the entire circumference. Thereby, reliable temporary assembly is realized.

  In addition, this invention is not limited to the said form at all, It can implement with a various form in the range which does not deviate from the summary.

(A) For example, since the pedal portion 41 and the rotor 43 are in a relative relationship, the pedal-side swash plate portion 411 having the above-described configuration is formed in the rotor 43, and the rotor-side swash plate portion 431 having the above-described configuration is formed in the pedal portion 41. May be formed.
(B) For example, in the above embodiment, the protrusions 422 are provided at the three locations of the pedal shaft 42 and the recesses 423 are formed. However, provisional assembly may be realized, and the number of the protrusions 422 is not particularly limited. Moreover, you may form the peripheral part over the perimeter in the outer periphery of the pedal shaft 42. FIG.
(C) For example, in the above embodiment, the peripheral edge 434 is formed on the inner periphery of the central hole 433 of the rotor 43 over the entire periphery. On the other hand, you may make it provide a protrusion part in the predetermined location of an inner periphery. The provisional assembly may be realized with respect to the protrusions, and the number of protrusions is not particularly limited.

1: accelerator pedal device, 10: housing, 11: bottom plate, 111: mounting hole, 12, 13: side plate, 121: sensor cover, 122: connector, 133: resin cover, 14: top plate, 20: pedal unit, 21 : Pedal, 22: arm part, 23: base part, 30: fitting part, 31: fitting hole, 40: rotating part, 41: pedal part, 411: pedal side swash plate part, 412: bottom part, 412a: bottom face 413: Low base part, 413a: Low slope, 413b: Low flat part, 414: High base part, 414a: High slope, 414b: High flat part, 42: Pedal shaft, 422: Projection part, 423: Concave part, 43: Rotor, 431: Rotor side swash plate portion, 431a: Slope, 431b: Flat surface, 432: Bottom portion, 432a: Bottom surface, 433: Center hole, 434: Peripheral portion, 435: Engagement portion

Claims (5)

A housing attachable to the vehicle body;
A pedal portion that is accommodated and supported in the housing so as to be rotatable by a support shaft, and that is rotated by a driver's stepping force;
A rotor supported coaxially with the pedal portion, biased in a direction opposite to the rotation direction by the pedal force of the pedal portion, and disposed so as to face the pedal portion;
On the surface of the pedal portion on the rotor side, a plurality of pedal side swash plate portions that protrude toward the rotor side and have a pedal slope are formed in the circumferential direction, while on the surface of the rotor portion on the pedal portion side A plurality of rotor-side swash plate portions that protrude toward the pedal portion side and have a rotor inclined surface capable of contacting the pedal inclined surface are formed in a circumferential direction, and the pedal-side swash plate portion and the rotor-side swash plate portion are mutually connected An accelerator pedal device configured to apply a force to separate the pedal portion and the rotor in the direction of the support shaft by bringing a slope into contact therewith,
One of the pedal portion and the rotor has a shaft portion that passes through the other central hole,
An accelerator pedal device configured to be temporarily assembled by fitting a fitting portion provided on the outer periphery of the shaft portion and a fitted portion provided on an inner periphery of the central hole. The accelerator pedal device according to claim 1,
In the temporarily assembled state, the rotor-side swash plate portion is accommodated in an accommodation space formed by the pedal-side swash plate portion and the surface of the pedal portion that are adjacent in the circumferential direction. An accelerator pedal device, wherein a surface of the pedal portion constituting the space and the rotor side swash plate portion are disposed close to each other. The accelerator pedal device according to claim 1 or 2,
The pedal side swash plate portion is composed of a low base portion having a small degree of protrusion toward the rotor side and a high base portion having a large degree of protrusion toward the rotor side and having the pedal slope.
When the fitting between the pedal portion and the rotor is released, the rotor-side swash plate portion gets over the low base portion and abuts the rotor inclined surface against the pedal inclined surface, and is disposed close to the low base portion. An accelerator pedal device, characterized in that In the accelerator pedal device according to any one of claims 1 to 3,
An accelerator pedal device, wherein at least one of the fitting portion and the fitted portion is provided at a plurality of locations. In the accelerator pedal apparatus as described in any one of Claims 1-4,
At least one of the fitting portion and the fitted portion is provided as a peripheral portion over the entire circumference.

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