JP2008132871A - Accelerator pedal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accelerator pedal device capable of surely achieving energy savings in an engine. <P>SOLUTION: This accelerator pedal device includes a plug 70 provided so as to protrude from an arm member 30 and a plate spring member 80 allocated on a pedal member 20 so as to abut the plug 70 of the arm member 30, which increases the control force of the pedal member 20 by assigning elastic force in such a direction as to inhibit oscillation of the arm member 30 to the pedal member 20 when the manipulated variable of the pedal member 20 is in a high power area beyond a preset threshold value. Further, when the manipulated variable of the pedal member 20 is in the high power area, a mounting load is preset in the plate spring member 80 so that the control force of the pedal member 20 is always higher than when the manipulated variable of the pedal member 20 is the threshold value or less. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an accelerator pedal device, and in particular, an accelerator pedal suitable for a vehicle in which foreign matter such as mud, dust, sand, rainwater and the like frequently adheres to a floor surface on which a pedal member is disposed like a construction machine. Relates to the device.

  As this type of accelerator pedal device, for example, there is one described in Patent Document 1. In this accelerator pedal device, a pedal member is supported by a base plate so as to be swingable, and an arm member is supported by the pedal member so as to be swingable. The arm member is provided at a portion which is substantially in the center in the longitudinal direction on the back surface of the pedal member. The arm member is provided with a torsion spring and a rotary potentiometer between the pedal member and the arm member. The torsion spring imparts an elastic force so as to maintain the distal end portion of the arm member away from the back surface of the pedal member. The rotary potentiometer outputs a detection signal according to the swing amount when the arm member swings with respect to the pedal member.

  In this accelerator pedal device, the distal end portion of the arm member abuts on the base plate, and in the unloaded state, the distal end portion of the pedal member is held in a standby posture separated from the base plate by the elastic force of the torsion spring. When the pedal member is pressed from this state, the arm member is swung against the elastic force of the torsion spring, and the front end of the pedal member is swung in the direction close to the base plate.

  On the other hand, when the operation force to the pedal member is removed, the tip of the arm member swings in a direction away from the back surface of the pedal member due to the elastic restoring force of the torsion spring, and thereby the tip of the pedal member is separated from the base plate. It will return to the standby posture.

  During these operations, a detection signal is output from the rotary potentiometer by the swing of the arm member with respect to the pedal member, and the engine speed is controlled using this detection signal as an operation amount of the pedal member.

  In the accelerator pedal device configured as described above, both the rotor potentiometer and the torsion spring are arranged at positions separated from the base plate. Therefore, even when applied to a vehicle where foreign matter such as mud, dust, sand, rainwater, etc. adheres to the floor surface where the pedal member is disposed, such as construction machinery, these foreign matter may be detected by a rotary potentiometer or torsion spring. There is no possibility of affecting the operation.

  By the way, if the operation amount of the pedal member increases, the engine speed increases. Therefore, for example, in a construction machine equipped with a hydraulic pump driven by an engine, the amount of oil discharged from the hydraulic pump increases as the engine speed increases, thereby increasing the vehicle speed or the hydraulic working machine. It becomes possible to increase the operation speed. However, if the engine speed is increased, the fuel consumption naturally increases. For this reason, it goes without saying that it is preferable to adjust the operation amount of the pedal member according to the required vehicle speed and the operation speed of the hydraulic working machine from the viewpoint of energy saving. In particular, when demands on the vehicle speed and the operating speed of the hydraulic working machine are small, it is preferable to operate the pedal member so as not to be in the engine speed range where the fuel consumption is large.

  However, the conventional accelerator pedal device is generally set so that when the operation force of the pedal member is increased, the operation amount is simply increased. For this reason, in order to save energy by operating the pedal member, the operating force applied to the pedal member must always be adjusted, which makes the operation extremely complicated. Furthermore, it is difficult to accurately recognize the relationship between the current operation amount of the pedal member and the fuel consumption amount of the engine, and relied on many years of experience and intuition.

  Here, recently, an accelerator pedal device is also provided in which the operation force of the pedal member is changed. For example, Patent Document 2 describes a mechanical load generating mechanism that applies a reaction force to the pedal member when the pedal member is swung by a predetermined angle. According to this accelerator pedal device, when the operation amount of the pedal member is increased, the reaction force by the load generating mechanism is applied in the middle thereof, and for example, a sense of moderation can be obtained in the operation force. For this reason, it becomes possible to recognize whether or not the operation amount when the pedal member is depressed reaches a predetermined angle, and the pedal member is prevented from being in the engine speed range where the fuel consumption is large even if skill is not required. It becomes possible to operate.

US Pat. No. 4,976,166 Japanese Patent Laid-Open No. 2002-238771

  By the way, the load generating mechanism of Patent Document 2 described above utilizes the fact that a large operating force is required when the tip of the plunger protrudes from the state where the tip of the plunger is engaged with the tip notch of the leaf spring. Immediately after passing through the tip notch, the operating force decreases rapidly. For this reason, when the plunger passes through the notch at the tip, the pedal member to which a large operating force is applied immediately reaches the operation end, and the operation amount of the pedal member from the time when the load generating mechanism operates to the operation end is reduced. It is difficult to grasp. In addition, when the plunger is again engaged with the notch portion of the leaf spring, a large operating force is not required. For this reason, once the plunger has passed through the notch, if the operation amount of the pedal member becomes small, it is determined whether or not the current operation amount of the pedal member is suitable for energy saving. May be difficult. In particular, in a construction machine, the vibration applied to the vehicle is large and frequent, so that the operating force applied to the pedal member also changes with this vibration, and the above-described problem becomes more remarkable.

  In view of the above circumstances, an object of the present invention is to provide an accelerator pedal device that can more surely save energy of an engine.

  In order to achieve the above object, an accelerator pedal device according to claim 1 of the present invention includes a pedal member that is swingably supported by a base plate via a base end portion, and a distal end portion that moves close to and away from the back surface of the pedal member. In this manner, an elastic force is applied between the pedal member and the arm member, an arm member that is swingably supported by the pedal member, an operation detection unit that outputs a detection signal in response to the swing of the arm member with respect to the pedal member A spring member that maintains the tip of the arm member in a state of being separated from the back surface of the pedal member, and by contacting the tip of the arm member to the base plate, the tip of the pedal member is held in a no-load state. While maintaining the stand-by posture separated from the base plate, the arm member is swung against the elastic force of the spring member when the pedal member is pressed. An accelerator pedal device in which the front end of the pedal member is swung in a direction closer to the base plate, and is arranged in a manner protruding from the arm member, and when the pedal member is pressed, the back surface of the pedal member When the pedal member is in a high output region where the operation amount of the pedal member exceeds a preset threshold value, the pedal member is disposed so as to contact the plug of the arm member, and the arm member swings relative to the pedal member. A leaf spring member that increases the operation force of the pedal member by applying an elastic force in a direction to suppress movement, and when the operation amount of the pedal member is in the high output region, the operation amount of the pedal member is the threshold value An attachment load is set in advance to the leaf spring member so that the operating force of the pedal member is always higher than in the following cases.

  According to the present invention, the load applied to the leaf spring member in advance so that the operation force of the pedal member when the operation amount of the pedal member is in the high output region is always higher than when the operation amount of the pedal member is equal to or less than the threshold value. Is set. Therefore, under any circumstances, it becomes possible to easily and accurately recognize whether or not the operation amount is in the high output region through the operation force of the pedal member. As a result, there is no possibility of causing a situation where the engine is in a rotational speed range where the fuel consumption is large even when it is unnecessary, and energy saving can be surely achieved.

  Exemplary embodiments of an accelerator pedal device according to the present invention will be explained below in detail with reference to the accompanying drawings.

  1 to 3 show an accelerator pedal device according to an embodiment of the present invention. The accelerator pedal device illustrated here is for performing a stepping operation to control the engine speed at a driver's seat of a construction machine, and includes a base plate 10 and a pedal member 20.

  The base plate 10 is formed by appropriately bending a metal plate-like member, and the support portion 11 and the track portion 12 are integrally formed. The support part 11 is a part attached to the site | part used as the floor surface of a driver's seat in a construction machine. The support portion 11 is provided with a bolt insertion hole 13 and a bearing portion 14 projecting upward. The track portion 12 is a portion extending obliquely forward from the front end portion of the support portion 11 upward. The base plate 10 has a sufficient thickness so that it does not easily deform even when an operator applies a large operating force.

  The pedal member 20 is a part that the operator steps on and, like the base plate 10, is configured to ensure sufficient strength against the operator's operating force. The pedal member 20 is supported on the bearing portion 14 of the base plate 10 via a support shaft 21 provided at the base end portion, and the tip end portion of the support shaft 21 moves in a manner approaching and separating from the track portion 12 of the base plate 10. It is possible to swing around the axis. A rubber cover 22 having a block-shaped uneven pattern is mounted on the surface of the pedal member 20 in order to prevent slipping during the stepping operation.

  On the other hand, an arm member 30 is provided on the rear surface of the pedal member 20 at a position that is substantially in the middle in the longitudinal direction. The arm member 30 is a link-like member having a length smaller than ½ of the entire length of the pedal member 20. The arm member 30 includes an arm shaft 31 at the proximal end portion and a roller 32 at the distal end portion. As shown in FIG. 2, the arm shaft 31 is a shaft-like member having a detection piece 31 a at one end thereof, and is fixed to the base end portion of the arm member 30. The roller 32 is a rolling member that is rotatably supported by the base end portion of the arm member 30 via the roller shaft 33, and is disposed so that the roller shaft 33 is parallel to the arm shaft 31. . The arm member 30 can swing to the pedal member 20 via the arm shaft 31 in such a manner that the peripheral surface of the roller 32 moves close to and away from the back surface of the pedal member 20 and the arm shaft 31 is parallel to the support shaft 21. It is attached to.

  Between the pedal member 20 and the arm member 30, a swing angle restricting means 40, a torsion spring (spring member) 50, and a rotary potentiometer (operation detecting means) 60 are provided.

  The swing angle regulating means 40 is configured by providing a stopper piece 41 on the arm member 30 and providing a stopper receiving surface 42 on the pedal member 20. The stopper piece 41 is a portion projecting from the base end portion of the arm member 30 so as to extend in the radially outward direction of the arm shaft 31. The stopper receiving surface 42 regulates the swing angle of the arm member 30 with respect to the pedal member 20 by contacting the stopper piece 41 of the arm member 30. More specifically, as shown in FIG. 1, when the tip of the pedal member 20 is swung away from the tip of the arm member 30, the included angle between the pedal member 20 and the arm member 30 is about It is configured to abut against the stopper piece 41 of the arm member 30 at the time when the angle reaches 60 ° and to prevent subsequent swinging. As shown in FIG. 3, when the tip of the arm member 30 is swung in the direction of approaching the tip of the pedal member 20, the stopper piece 41 and the stopper receiving surface of the swing angle restricting means 40. 42 does not function at all, and the arm member 30 comes into contact with the back surface of the pedal member 20.

  The torsion spring 50 is an elastic member that is arranged in a manner of winding around the arm shaft 31 at the base end portion of the arm member 30. The torsion spring 50 has one end 51 abutting against the pedal member 20, and the other end 52 abutting against the arm member 30, thereby applying an elastic force therebetween, and a stopper piece of the arm member 30. 41 is always maintained in contact with the stopper receiving surface 42 of the pedal member 20. The mounting load of the torsion spring 50 is appropriately set so that the pedal member 20 does not swing due to vibration applied to the construction machine.

  As shown in FIG. 2, the rotary potentiometer 60 is attached to a portion of the pedal member 20 that is on the extension of one end of the arm shaft 31. The rotary potentiometer 60 detects relative swing through the detection piece 31a of the arm shaft 31 when the arm member 30 swings with respect to the pedal member 20, and outputs the detection signal to the outside.

  On the other hand, in the accelerator pedal device, as shown in FIG. 1, the arm member 30 is provided with a plug 70, while the pedal member 20 is provided with a leaf spring member 80. The plug 70 is a convex member provided on the outer surface of the intermediate portion of the arm member 30. When the plug 70 swings in the direction in which the distal end portion of the arm member 30 approaches the pedal member 20, It is provided in the opposite part. The leaf spring member 80 is an elastic member configured in the shape of a rectangular plate, and is provided in a portion that is pressed by the plug 70 when the distal end portion of the arm member 30 swings in the direction of approaching the pedal member 20. It is. More specifically, the base end portion of the leaf spring member 80 is screwed to the back surface of the distal end portion of the pedal member 20 via a spacer 81 and a shim plate 82. The distal end portion of the leaf spring member 80 is locked to a locking portion 23 provided on the back surface of the pedal member 20 and is bent in advance in a direction approaching the back surface of the pedal member 20. The initial deflection amount of the leaf spring member 80 is for setting an attachment load to be applied to the leaf spring member 80 in advance, and can be appropriately adjusted by the spacer 81 and the shim plate 82 interposed between the pedal member 20 and the leaf spring member 80. Is possible. That is, if the thickness of the spacer 81 and the shim plate 82 is increased, the initial deflection amount of the leaf spring member 80 is also increased, so that the attachment load can be set large. Conversely, if the thickness of the spacer 81 and the shim plate 82 is reduced, the initial deflection amount of the leaf spring member 80 is also reduced, so that the mounting load can be set small.

  The accelerator pedal device configured as described above is provided in the standby posture state shown in FIG. 1 with the base plate 10 fixed to the floor surface of the driver's seat via the support portion 11. That is, in the standby posture, the stopper piece 41 of the arm member 30 abuts on the stopper receiving surface 42 of the pedal member 20 by the elastic force of the torsion spring 50, and further the pedal member 20 is appropriately swung around the axis of the support shaft 21. By doing so, the tip of the arm member 30 is brought into contact with the track portion 12 of the base plate 10 via the roller 32. In this standby posture, the distal end portion of the arm member 30 is separated from the back surface of the pedal member 20, so that the distal end portion of the pedal member 20 is largely separated from the base plate 10.

  When the pedal member 20 is pressed from this standby posture, as shown in FIG. 3, the tip of the arm member 30 swings in the direction approaching the pedal member 20, and as a result, the tip of the pedal member 20 is twisted. The base plate 10 swings in the direction approaching the track portion 12 against the elastic force of 50.

  When the operating force on the pedal member 20 is further increased, the plug 70 provided on the arm member 30 eventually comes into contact with the leaf spring member 80 provided on the pedal member 20. As a result, when the operation amount of the pedal member 20 is increased thereafter, an operation force obtained by adding the elastic force of the leaf spring member 80 is required. In the present embodiment, the individual dimensions are set so that the plug 70 contacts the leaf spring member 80 when the operation amount of the pedal member 20 reaches about 80%.

  On the other hand, when the operating force with respect to the pedal member 20 is removed, the distal end portion of the arm member 30 is swung away from the back surface of the pedal member 20 by the elastic restoring force of the leaf spring member 80 and the torsion spring 50, as shown in FIG. Thus, the stopper piece 41 of the arm member 30 comes into contact with the stopper receiving surface 42 of the pedal member 20. As a result, the distal end portion of the pedal member 20 returns to the standby posture separated from the base plate 10.

  During these operations, a detection signal is output from the rotary potentiometer 60 by the swing of the arm member 30 with respect to the pedal member 20, and the engine speed is controlled using this detection signal as an operation amount of the pedal member 20. In this case, in this accelerator pedal device, the rotary potentiometer 60 is attached to the back surface of the pedal member 20 and the portion where the proximal end portion of the arm member 30 is supported. Therefore, the pedal member 20 and the arm member 30 described above. Even when the vehicle is swung, it is always kept away from the floor of the driver's seat. Similarly, the torsion spring 50 and the leaf spring member 80 interposed between the pedal member 20 and the arm member 30 are always maintained in a state separated from the floor surface of the driver's seat. Accordingly, there is no possibility that the operations of the rotary potentiometer 60, the torsion spring 50, and the leaf spring member 80 will be affected even when foreign matter such as mud, dust, sand, rainwater or the like adheres to the floor surface of the driver's seat. , You will be able to ensure high reliability.

  FIG. 4 shows the relationship between the operation force (stepping force) applied to the pedal member 20 and the operation amount in the accelerator pedal device described above. Hereinafter, the operation of the accelerator pedal device will be described with reference to FIG. 4 as appropriate, and the features of the present invention will be described in further detail.

  First, when the operator presses the pedal member 20 from the standby posture and the operation force exceeds a predetermined operation start load, the pedal member 20 swings in a direction approaching the base plate 10. Thereafter, the operation amount of the pedal member 20 sequentially increases as the operation force increases (point O → point A → point B in FIG. 4).

  The above-mentioned operation start load is a value obtained by summing the mounting load of the torsion spring 50 and the frictional resistance force when sliding various sliding portions. Further, the sliding portion is a portion that slides when the pedal member 20 is swung toward the base plate 10. In the present embodiment, the swing sliding contact portion between the support shaft 21 and the pedal member 20, the swing sliding contact portion between the arm shaft 31 and the pedal member 20, and the rolling slide contact portion between the roller shaft 33 and the roller 32 are provided. Corresponds to the sliding part. The frictional resistance force of these sliding portions acts to suppress this when the operation amount of the pedal member 20 is increased, and is added to the mounting load of the torsion spring 50 as the operation start load.

  The range in which the operation amount of the pedal member 20 sequentially increases as the operation force increases is until the plug 70 provided on the arm member 30 contacts the leaf spring member 80. In this case, the ratio of the change in the operation amount to the change in the operation force of the pedal member 20 is a constant value determined by the spring constant of the torsion spring 50.

  When the operating force applied to the pedal member 20 is removed from the point in time when the plug 70 of the arm member 30 contacts the leaf spring member 80, the stand-by posture in which the distal end portion of the pedal member 20 is separated from the base plate 10 by the elastic restoring force of the torsion spring 50. Return. The operation force when the operation amount of the pedal member 20 is reduced is the same as the operation force because the frictional resistance force of the sliding portion described above acts in a direction to suppress the return movement of the pedal member 20. It becomes a small value compared with the case where the operation amount of the pedal member 20 is increased (point B → point G → point H → point O in FIG. 4). That is, hysteresis occurs in the operation force of the pedal member 20 depending on whether the frictional resistance of the sliding portion increases or decreases the operation amount. As a result, for example, even when a large vibration is applied during the operation of the pedal member 20 and the operation force applied to the pedal member 20 is slightly changed, the operation amount of the pedal member 20 is sensitively changed. Thus, chattering of the output of the rotary potentiometer 60 can be prevented. Even in this case, the ratio of the change in the operation amount to the change in the operation force of the pedal member 20 is a constant value determined by the spring constant of the torsion spring 50, and from point A to point B in FIG. And the same value as when the operation amount of the pedal member 20 is increased.

  On the other hand, after the plug 70 provided on the arm member 30 comes into contact with the leaf spring member 80, the plate spring member 80 is applied when an operation force exceeding the attachment load of the leaf spring member 80 is further applied to the pedal member 20. Is elastically deformed. When the leaf spring member 80 is elastically deformed, the distal end portion thereof is separated from the locking portion 23 of the pedal member 20, so that the arm member 30 swings in a direction approaching the pedal member 20. Thereafter, the operation amount of the pedal member 20 sequentially increases as the operation force increases (point B → point C → point D in FIG. 4).

  After the plug 70 abuts on the leaf spring member 80, the range in which the operation amount of the pedal member 20 sequentially increases as the operation force increases is until the arm member 30 abuts on the back surface of the pedal member 20. Until the pedal member 20 reaches the end of operation. In this case, the ratio of the change in the operation amount to the change in the operation force of the pedal member 20 is a constant value determined by the spring constants of the torsion spring 50 and the leaf spring member 80, and the plug 70 contacts the leaf spring member 80. The value is smaller than before contact.

  When the operating force applied to the pedal member 20 is removed from the time point when the arm member 30 contacts the back surface of the pedal member 20, the distal end portion of the leaf spring member 80 is caused to move by the elastic restoring force of the torsion spring 50 and the leaf spring member 80. The state returns to the state of contact with the locking portion 23 (point D → point E → point F in FIG. 4). The frictional resistance of the sliding portion acts in the opposite direction when the operation amount of the pedal member 20 is increased and when it is decreased, the same as before the distal end portion of the leaf spring member 80 is separated from the locking portion 23. It is. Therefore, the operation force when the operation amount of the pedal member 20 decreases from the point E to the point F in FIG. 4 is the force when the operation amount of the pedal member 20 increases from the point C to the point D in FIG. The value is smaller than the operating force. However, the ratio of the change in the operation amount to the change in the operation force of the pedal member 20 in this case is a constant value determined by the spring constants of the torsion spring 50 and the leaf spring member 80, and the point C in FIG. This is the same as the value when the operation amount of the pedal member 20 is increased to the D point.

  Thereafter, the operation amount of the pedal member 20 changes according to the above-described conditions according to the operation force applied to the pedal member 20.

  Here, in the accelerator pedal device described above, after the plug 70 of the arm member 30 contacts the leaf spring member 80, the operation force of the pedal member 20 is not applied unless the operation force obtained by adding the attachment load of the leaf spring member 80 is applied. The amount of operation of the pedal member 20 does not change even when is increased. That is, when the operation amount of the pedal member 20 is increased, it is possible to give a large change to the operation force during the operation.

  Furthermore, the plug 70 contacts the leaf spring member 80 against the maximum operating force (point B in FIG. 4) required from the standby posture until the plug 70 of the arm member 30 contacts the leaf spring member 80. When the minimum operating force (point F in FIG. 4) required between the contact and the pedal member 20 reaching the end of operation is set large, the operation is performed even while the operation amount of the pedal member 20 is being reduced. It is possible to give a great change to the force. That is, when changing from the point F to the point B in FIG.

  The relationship between point B and point F in FIG. 4 described above can be set by adjusting the mounting load of the leaf spring member 80. That is, if the attachment load of the leaf spring member 80 is set in consideration of the frictional resistance force of the sliding portion described above, it is possible to set the operating force so that the F point is always larger than the B point. Become. Moreover, for the plate spring member 80, it is possible to set a large elastic force without increasing the mounting space by increasing the plate thickness.

  According to the accelerator pedal device in which the operation force is set as described above, when the operation amount of the pedal member 20 is increased, the operation force greatly increases in the middle of the operation. It is possible to easily operate the pedal member 20 so that it does not become a “high output region”. That is, if the operation force in a range not exceeding the point C in FIG. 4 is continuously applied, there is no possibility that the operation amount of the pedal member 20 reaches the high output region.

  On the other hand, when it is necessary to greatly increase the vehicle speed of the construction machine or greatly increase the operating speed of the hydraulic working machine, if the operating force of the pedal member 20 is increased consciously, the amount of operation increases. It will reach the output area. As a result, the number of revolutions of the engine increases and the above-described requirements can be satisfied. Moreover, in this high output region, the operating force for maintaining the operating amount of the pedal member 20 is the sum of the torsion spring 50 and the leaf spring member 80. Therefore, unless the pedal member 20 is consciously operated, the amount of operation immediately deviates from the high output region, which may cause a situation in which the fuel consumption of the engine continuously increases when it is not necessary. Absent.

  Further, according to the above accelerator pedal device, even when the operation amount of the pedal member 20 changes and decreases after the operation amount of the pedal member 20 reaches the high output region, the operation force is increased or decreased. It is possible to easily and accurately determine whether or not the current operation amount is in the high output region. That is, the pedal member 20 operates after the plug 70 contacts the leaf spring member 80 with respect to the maximum operating force required from the standby posture until the plug 70 of the arm member 30 contacts the leaf spring member 80. The minimum operating force required until reaching the end is set large. Therefore, when the operation amount of the pedal member 20 is reduced, if there is a change in which the operation force is greatly reduced in the middle of the operation, it is possible to recognize that the current operation amount deviates from the high output region. Conversely, even when the operation amount of the pedal member 20 decreases, if the operation force does not change significantly during the operation, it is recognized that the operation amount of the pedal member 20 is still within the high output region. Can do.

  As a result, according to the construction machine to which the accelerator pedal device is applied, it is possible to optimally adjust the operation amount of the pedal member 20 according to the always required vehicle speed and the operation speed of the hydraulic working machine, and the engine This makes it possible to save energy, for example, by significantly reducing fuel consumption.

  In the above-described embodiment, an accelerator pedal device applied to a construction machine is illustrated, but it can also be applied to other vehicles.

  Further, in the above-described embodiment, the distal end portion of the arm member is close to the distal end portion of the pedal member. However, the distal end portion of the arm member is close to the proximal end portion of the pedal member. It is also possible to configure as described above. However, in this case, it is necessary to change the mounting positions of the leaf spring member and the plug.

  Further, in the above-described embodiment, the range in which the operation amount of the pedal member 20 exceeds about 80% is set as the high output region, but the present invention is not limited to this. For example, if the mounting position of the arm member 30 with respect to the pedal member 20 and the length of the arm member 30 are changed, the relationship between the operation amount of the pedal member 20 and the high output area can be changed as appropriate.

FIG. 3 is a partially cutaway side view showing a state where the pedal member is in a standby posture in the accelerator pedal device according to the embodiment of the present invention. It is the II-II sectional view taken on the line in FIG. FIG. 2 is a partially cutaway side view showing a state in which a pedal member swings in the accelerator pedal device shown in FIG. 1. It is the graph which showed the relationship between the operation amount of the pedal member applied to the accelerator pedal apparatus shown in FIG. 1, and the pedal effort given to a pedal member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Base plate 20 Pedal member 21 Support shaft 22 Cover 23 Locking part 30 Arm member 31 Arm shaft 31a Detection piece 32 Roller 33 Roller shaft 40 Oscillation angle control means 41 Stopper piece 42 Stopper receiving surface 50 Torsion spring 60 Rotary lipotensometer 70 Plug 80 Leaf spring member 81 Spacer 82 Shim plate

Claims (1)

A pedal member swingably supported on the base plate via the base end,
An arm member that is pivotably supported by the pedal member in a manner in which the front end portion moves close to and away from the back surface of the pedal member;
Operation detecting means for outputting a detection signal in response to swinging of the arm member with respect to the pedal member;
A spring member that maintains the distal end portion of the arm member separated from the back surface of the pedal member by applying an elastic force between the pedal member and the arm member, and makes the distal end portion of the arm member contact the base plate Thus, in the no-load state, the pedal member is held in a standby posture separated from the base plate while the arm member is swung against the elastic force of the spring member when the pedal member is pressed. An accelerator pedal device that swings the tip of the actuator in a direction close to the base plate,
A plug that protrudes from the arm member and moves close to the back surface of the pedal member when the pedal member is pressed;
When the operation amount of the pedal member is in a high output region exceeding a preset threshold value, the pedal member is arranged in a manner to contact the plug of the arm member and elastic in a direction to suppress the swing of the arm member with respect to the pedal member. And a leaf spring member that increases the operation force of the pedal member by applying force, and when the operation amount of the pedal member is in the high output region, the operation amount of the pedal member is always smaller than when the operation amount of the pedal member is equal to or less than the threshold value. An accelerator pedal device, wherein a mounting load is set in advance on the leaf spring member so that an operating force of the pedal member is increased.

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