JP4436452B2 - Vehicle operation pedal device with load sensor and operation device with load sensor - Google Patents

Description

  The present invention relates to an operation device such as a vehicle operation pedal device, and more particularly to an improvement of an operation device with a load sensor provided with a load sensor for electrically detecting an operation force.

(a) an operation member to be moved, (b) a reaction force member to which an operation force of the operation member is transmitted and a reaction force corresponding to the operation force is applied, and (c) the operation member A pair of members interposed between the reaction force members and connected to each other so as to be relatively rotatable around a connection pin; and at least one rotation connection portion for transmitting the operation force via the connection pin; (D) An operation device with a load sensor having a load sensor for electrically detecting the operation force is known. The vehicle brake pedal device described in Patent Document 1 is an example thereof, and a push rod (reaction member) protruding from the master cylinder can be relatively moved in the axial direction with respect to a connecting pin protruding from a side portion of the operation pedal. The displacement amount of the push rod that is displaced with respect to the connection pin against the urging force of the spring is detected by a sensor.
US Pat. No. 5,563,355

  However, in the device described in the cited document 1, it is necessary to provide a long hole in the push rod and connect it so as to be capable of relative movement in the axial direction, and therefore, a normal push rod cannot be used as it is. In addition, since the push rod rotates relative to the connecting pin as the operation pedal is depressed, the spring that biases the push rod and the sensor that detects the amount of displacement can also rotate relative to the connecting pin. It is necessary to dispose and the structure becomes complicated, and these push rods, springs, and sensors are disposed on the side of the operation pedal. It is necessary to have a strong structure, and the apparatus is large and expensive as a whole.

  On the other hand, although not yet publicly known, as shown in FIG. 16, a technique of arranging a load sensor in a compact manner at the connecting position of the clevis pin is considered. FIGS. 16A and 16B are diagrams showing an operation pedal device 200 for a service brake for a vehicle. FIG. 16A is a front view, and FIG. 16B is an enlarged view of a section XVIA-XVIA in FIG. The pedal support 12 is provided with a plate-like operation pedal 16 that is rotatable about the axis of a substantially horizontal support shaft 14. The operation pedal 16 is stepped on by a driver in response to a braking request. A step portion (pad) 18 is provided at a lower end portion, and a brake is provided at a middle portion via a rotation connecting portion 20. An operating rod 22 of the booster is connected. The rotary connecting portion 20 includes a U-shaped clevis 24 integrally fixed to the end portion of the operating rod 22 by screw connection or the like, and a clevis pin 26 disposed on the operation pedal 16 in parallel with the support shaft 14. The operating rod 22 and the operation pedal 16 are coupled to each other so as to be relatively rotatable about the axis of the clevis pin 26. The clevis pin 26 corresponds to a connecting pin, and both end portions protrude to the side of the operation pedal 16, and are held on the U-shaped clevis 24 so as not to be pulled out by a snap ring or a retaining pin. An output corresponding to the operating force of the operating pedal 16 is transmitted to the operating rod 22 through the rotation connecting portion 20 and a reaction force corresponding to the output is applied by the brake booster. The operating rod 22 corresponds to a reaction force member. In the case of a by-wire type operation pedal device that electrically controls a wheel brake, a reaction force member to which a predetermined reaction force is applied by a reaction force mechanism or the like is an operating rod. Connected instead of 22.

  The operation pedal 16 is provided with a sensor mounting hole 202 having a diameter larger than that of the clevis pin 26 at a position where it is connected to the clevis pin 26, and the load sensor 30 is provided in an annular space between the sensor mounting hole 202 and the clevis pin 26. Is arranged. The load sensor 30 includes a cylindrical deformable member 32, and detects a load applied in the radial direction of the deformable member 32. The load sensor 30 includes an annular member 34 disposed on the outer peripheral side of the deformable member 32, and a deformable member. And a shaft-like member 36 disposed on the inner peripheral side of the member 32. The annular member 34 corresponds to a main body member, and is integrally assembled in the sensor mounting hole 202 in a fixed posture (phase) by press-fitting, bolts, leaf springs, or the like, and one end portion of the deformation member 32 in the axial direction (see FIG. 16 (b) is integrally held by welding or the like. The shaft-like member 36 integrally holds the other end portion in the axial direction of the deformable member 32 (the lower end portion in FIG. 16B) by welding or the like, and an insertion hole 38 is formed in the shaft center portion. The clevis pin 26 is inserted through the insertion hole 38. The clevis pin 26, the insertion hole 38, and the clevis 24 are all rotatable relative to each other, and are relatively rotated with less friction as the operation pedal 16 is depressed. However, as necessary, the friction is reduced. It is also possible to interpose a bearing or a bearing.

  As described above, the annular member 34 and the shaft-like member 36 are connected to each other via the deformable member 32. When the load applied from the outside in the radial direction, that is, the direction perpendicular to the shaft center is substantially zero, the members 32, 34 are provided. , 36 are held substantially concentric with the axis of the clevis pin 26. On the other hand, when a radial load is applied between the annular member 34 and the shaft-like member 36 by the reaction force of the operating rod 22 as the operating pedal 16 is stepped on, the deforming member 32 is sheared and deformed. The annular member 34 on the 16th side is displaced in the direction approaching the operating rod 22 relative to the shaft-like member 36 (the left direction in FIG. 16). An annular space is provided between the annular member 34 and the shaft-like member 36 so as to allow relative displacement in the radial direction between them and shear deformation of the deformation member 32. It is made of a metal material such as ferritic stainless steel that can be elastically deformed by receiving a load, and is sheared and deformed according to the operation force of the operation pedal 16 when the operation pedal 16 is stepped on. In order to detect the shear strain of the deformable member 32, a strain detection element such as a strain resistance element is attached to the outer peripheral surface or the inner peripheral surface of the deformable member 32, and the control circuit unit of the vehicle is connected via the wire harness 56. The stepping operation force can be detected based on the electrical signal output from the strain sensing element.

  In such a vehicle operation pedal device 200, the rotation connecting portion 20 that transmits the operation force applied to the operation pedal 16 to the operating rod 22 is connected to the operating rod 22 via the clevis pin 26 so as to be relatively rotatable. Since the operation pedal 16 is provided with a sensor mounting hole 202, and the cylindrical load sensor 30 is disposed in the annular space between the sensor mounting hole 202 and the clevis pin 26, a rotational moment such as torsion is suppressed. Thus, the entire operation pedal device 200 can be configured simply and compactly. Further, since the peripheral members such as the operating rod 22 and the clevis 24 can be the same as those of the conventional pedal device, they can be constructed at low cost.

  However, even in such a vehicle operation pedal device 200, when the operation pedal 16 is rotated around the support shaft 14 as the operation pedal 16 is depressed, the operating rod 22 and the operation pedal 16 are also operated by the clevis pin 26. Therefore, there is a possibility that the position of the load applied to the deformation member 32, that is, the deformation direction changes, and the detection accuracy deteriorates accordingly. Regardless of such a change in the deformation position of the deformation member 32, the size and arrangement position of the strain sensing element are set so that the deformation can be detected, but the deformation position of the deformation member 32 is continuously in the circumferential direction. Therefore, it is difficult to ensure high detection accuracy because the deformation mode is complicated and tends to vary.

  The present invention has been made against the background described above. The purpose of the present invention is to relatively displace the shaft member and the main body member (annular member 34 in FIG. 16) in a direction perpendicular to the axis of the shaft member. The load sensor that electrically detects the operation force based on the operation force is provided in the rotation connecting portion, and the operation device that can detect the operation force transmitted through the connection pin improves the detection accuracy of the load sensor. There is to make it.

In order to achieve such an object, the first invention provides (a) an operation pedal that is movably disposed on a pedal support fixed to a vehicle and that is stepped on by a driver, and (b) the operation pedal. together with the operation force is transmitted, and the reaction force member reaction force is caused to act corresponding to the operation force, (c) before SL operating force electrically and load sensor for detecting an operation for load-sensor-equipped vehicle with a In the pedal device, (d) the load sensor includes a shaft-shaped member, a body member disposed so as to be relatively displaceable in a direction perpendicular to the shaft center of the shaft-shaped member, and the shaft-shaped member and the body member. A deformable member arranged across the deformable member and a strain sensing element fixed to the deformable member, and the shaft member and the main body member are relatively displaced in a direction perpendicular to the axis of the shaft member by the reaction force. Thus, the deformation of the deformable member is distorted by deforming the deformable member And it detects the known device, from (e) the load sensor, the operation pedal and the reaction force member itself, or other member that is interposed so as to connect the operating pedal and the reaction force member in it, such as And either one of the shaft-like member and the main body member is fixed to one of the sensor arrangement members of the pair of members that transmit the operating force , and (f) front Between the other of the shaft-shaped member and the main body member of the load sensor and the other of the pair of members, the other of the pair of members is connected to the other of the pair of members via a connection pin so as to be relatively rotatable. machine with transmitting the operation force or the reaction force to the load sensor, the operating force or reaction force direction of the operation force or the reaction force to a predetermined direction or et operation for the load sensor from Direction change A replacement mechanism is provided.

  According to a second aspect of the present invention, in the vehicle operation pedal device with a load sensor according to the first aspect, the direction changing mechanism is disposed on the sensor arrangement member so as to be rotatable around a support pin parallel to the connection pin. The shaft member of the load sensor, the other of the body member, and the connection pin are connected to each other, and are rotated around the support pin based on the operation force or the reaction force applied from the connection pin. It is a dynamic link.

  According to a third aspect of the present invention, in the vehicle operation pedal device with a load sensor according to the first aspect, the direction changing mechanism includes: (a) a connection pin guide provided on the sensor arrangement member and defining a movement path of the connection pin; And (b) an interlocking member that displaces the other of the shaft member and the main body member of the load sensor in the predetermined direction in conjunction with the movement of the connecting pin.

  4th invention is the operation pedal device for vehicles with a load sensor of 3rd invention, (a) The said connection pin guide is provided so that the said connection pin may be moved to the said fixed direction, (b) The said interlocking | linkage The member is a linear link that connects the shaft member of the load sensor and the other of the body member and the connecting pin.

  According to a fifth aspect of the invention, in the vehicle operation pedal device with a load sensor according to the third aspect of the invention, (a) the connection pin guide is provided to move the connection pin in the fixed direction; The member is a slide member that is moved in the predetermined direction integrally with the connecting pin.

  A sixth aspect of the invention is the vehicle operating pedal device with a load sensor according to the third aspect of the invention, wherein the interlocking member is (a) an intermediate slide member that is moved in the predetermined direction by an intermediate guide provided on the sensor arrangement member. (B) It has an interlocking link for connecting the intermediate slide member and the connecting pin.

A seventh aspect of the invention is the vehicle operation pedal device with a load sensor according to any one of the first to sixth aspects of the invention, wherein: (a) the sensor arrangement member is the reaction force via the load sensor and the direction changing mechanism. a plate-like member connected to a member, the sensor mounting hole penetrates is provided with, (b) the load sensor, the body member is fixed integrally to the sensor mounting hole, the shaft The sensor pin provided on the shaft center of the shaped member is disposed so as to protrude to both sides of the sensor mounting hole, and (c) the direction changing mechanism is provided between both ends of the sensor pin and the connecting pin. It is characterized by.

  According to an eighth aspect of the present invention, in the vehicle operation pedal device with a load sensor according to any one of the first to seventh aspects, (a) the operation pedal is disposed on the pedal support so as to be rotatable around a support axis. (B) The sensor disposition member is an operation pedal thereof.

A ninth aspect of the invention is the vehicle operation pedal device with a load sensor according to any one of the first to seventh aspects of the invention. (A) The pedal support is rotatably disposed on the pedal support and is connected to the operation pedal via a connecting link. And an intermediate lever connected to the reaction force member via the load sensor and the direction changing mechanism , and (b) the sensor arrangement member is the intermediate lever. .

  According to a tenth aspect of the present invention, in the vehicle operation pedal device with a load sensor according to any one of the first to ninth aspects, the deformable member has a cylindrical shape, and one end and the other end of the cylindrical shape are respectively provided. The main body member and the shaft-shaped member are integrally fixed, and the main body member and the shaft-shaped member are displaced relative to each other based on the reaction force. It is detected by a sensing element.

  An eleventh aspect of the invention is the vehicle operation pedal device with a load sensor according to any one of the first to ninth aspects of the invention, wherein the deformable member has a cylindrical shape, and the main body member is arranged around a center line of the deformable member. A part of the shaft-shaped member is inserted into the inside of the cylindrical shape of the deformable member, and the body member and the shaft-shaped member are relatively displaced based on the reaction force. Accordingly, a tensile strain generated in the deformable member is detected by the strain sensing element.

The twelfth invention includes (a) an operation member to be moved and operated, (b) a reaction force member to which an operation force of the operation member is transmitted and a reaction force corresponding to the operation force is applied, and (c) ) before SL load-sensor-equipped operating device having a load sensor, an electrically detecting the operating force, (d) the load sensor includes a shaft-like member, relative displacement of the axis perpendicular direction of the shaft-like member A deformable member disposed across the shaft member and the body member, and a strain sensing element fixed to the deformable member, and the reaction force by the shaft-like member and the main body member is caused to deform axial direction perpendicular to the relative displacement to the deformable member of the shaft-like member, and detects the deformation of the deformable member by a strain detecting element, the (e) load sensor, the operating member and the reaction member itself or the operation unit of it such as And consists other member that is interposed so as to couple the reaction force member, the one of the sensor arranging member of the pair of members for transmitting the operating force, both of the shaft-like member and the body member or with one is arranged to be secured, (f) is between the shaft-like member and the other of the other and the pair of members of said body member before Symbol load sensor, the pair of members It is connected to the other via a connecting pin so as to be relatively rotatable, and the operating force or reaction force is transmitted from the connecting pin to the load sensor, and the operating force or reaction force is in a certain direction with respect to the load sensor. or pressurized et operation the operating force to a is characterized by the orientation converting mechanism that converts the reaction force direction mechanically is provided.

In the vehicle operating pedal device with a load sensor according to the first aspect of the present invention, the load sensor that electrically detects the operating force based on the relative displacement between the main body member and the shaft-shaped member is one of the pair of members that transmit the operating force. disposed in the sensor mounting member, since the operation force or the reaction force through the connecting pin from the other of the pair of members are adapted to detect the operating force by being transmitted, for example, a sensor disposed By providing a sensor mounting hole in the member and disposing the load sensor, the entire apparatus can be configured simply and compactly. Further, since the same peripheral members as the conventional pedal device can be used as the peripheral members such as rods and clevises, it can be constructed at low cost.

On the other hand, in the first invention, direction can converting mechanism is provided between the other and consolidated the pin of the shaft-like member and the body member of the load weight sensor, applied from consolidated pin with depression of the operational pedal operating force Alternatively, since the reaction force is applied to the load sensor from a certain direction, the deformed portion of the deformable member is kept constant, the detection accuracy of the operating force is improved, and the variation in the detection accuracy is suppressed. High reliability.

  In the second aspect of the invention, the rotation link is provided as a direction changing mechanism so as to be rotatable around the support pin, and the other of the shaft-shaped member and the main body member of the load sensor and the connection pin are connected to the rotation link. Therefore, the apparatus is simple and inexpensive, and can be configured compactly with respect to the vehicle front-rear direction, which is the direction in which the operation pedal is depressed. Also in the fourth and fifth inventions, a connection pin guide for moving the connection pin in a certain direction is provided, and the connection pin is connected to the other of the shaft member and the main body member of the load sensor with a linear link or connected. Since it is only necessary to provide a slide member that moves integrally with the pin in a certain direction, the apparatus is configured simply and inexpensively as in the second invention.

  In the sixth invention, an intermediate slide member that is moved in a fixed direction by the intermediate guide is provided, and the intermediate slide member and the connecting pin are connected by an interlocking link, and directly from the intermediate slide member or the linear motion link and the slide member. Since the load is transmitted to the other of the shaft-like member and the main body member of the load sensor indirectly through the like, etc., the degree of freedom in setting the connection position of the connection pin, the placement position of the load sensor, etc. Becomes higher.

In the seventh aspect of the invention, the member connected to the reaction force member via the load sensor and the direction changing mechanism is the sensor arrangement member, and the load sensor is arranged, so that the final force transmitted from the connection pin to the reaction force member The operating force (output) is detected, and for example, the braking force when the hydraulic brake or the like is mechanically operated via the reaction member can be detected with high accuracy. In addition, the body member is integrally fixed in the sensor mounting hole provided in the sensor mounting member, and both end portions of the sensor pin provided on the shaft center of the shaft-like member and projecting to both sides of the sensor mounting hole, and the connecting pin, Since the orientation changing mechanism is provided between the two, the device can be configured in a simple and compact manner, and the load (reaction force) of the connecting pin is applied substantially evenly to the shaft-like member of the load sensor, thereby further improving the detection accuracy. improves.

  The operation device with a load sensor of the twelfth invention is not limited to the vehicle operation pedal device, and can be applied to various operation devices such as an operation pedal device and a manual operation device other than those for vehicles. The configuration, arrangement structure, orientation changing mechanism, and the like are the same as those of the first invention, and substantially the same functions and effects as those of the first invention are obtained. The first invention can be regarded as one embodiment of the twelfth invention, and the operation pedal corresponds to an operation member.

  The present invention is preferably applied to a brake pedal device for a service brake, but can also be applied to an operation pedal device for an accelerator or a parking brake. The present invention can be applied to various operating devices such as manually operated operating devices. The reaction member is, for example, an operating rod of a brake booster or a push rod of a brake master cylinder, and is configured to mechanically operate a wheel brake or the like, but electrically according to an operation force detected by a load sensor. It can also be applied to electric (by-wire) operation brake devices that control wheel brakes, drive devices, etc., in which case a stroke simulator, reaction force mechanism, etc. are connected to the reaction force member to achieve a predetermined reaction force. Should be added.

Load sensor is, for example, a connecting portion and the intermediate lever and the reaction force member for connecting the operating pedal and the reaction force member is arranged to the connecting portion connecting the connecting link connecting the operating pedal and the intermediate lever In the case where it is provided, it may be a connecting portion between the connecting link and the operation pedal, or a connecting portion between the connecting link and the intermediate lever, and the location where the load sensor is disposed is appropriately determined.

  The load sensors of the tenth and eleventh inventions are provided with a cylindrical deformable member. However, the shape of the deformable member can be appropriately set when implementing other inventions, for example, a shaft-shaped member and a main body member. The part deformed based on the relative displacement with the arc may be an ellipse with at least an arc shape, etc., and by applying a tensile load or a compressive load to both ends of the arc, the arc-shaped portion is stretched and deformed Or it arrange | positions so that bending deformation may be carried out. In addition, a donut shape corresponding to the annular space between the shaft-shaped member and the main body member is formed, and deformation such as tensile deformation, compression deformation, or bending deformation is performed based on the relative displacement between the shaft-shaped member and the main body member. A member can also be used. In the present invention, since a load (operation force or reaction force) is applied from a certain direction around the axis of the load sensor, the direction of relative displacement between the shaft-shaped member and the main body member is constant and is deformed by the relative displacement. Various forms of deformable members can be employed.

  The load sensor electrically detects the strain of the deformable member that is elastically deformed by a strain sensing element, and the strain may be converted into a load, that is, an operation force by a predetermined map or arithmetic expression. As the strain detection element, a strain resistance element such as a thin film type or thick film type semiconductor strain gauge or a normal strain gauge is preferably used, but a piezoelectric element, a piezoelectric conversion element, or the like can also be used.

  The load sensor is, for example, a body member fixed integrally in a sensor mounting hole provided through a plate-shaped sensor arrangement member, and a sensor pin provided on the shaft member or the shaft center of the shaft member. However, it is desirable that a direction changing mechanism is provided between the shaft-shaped member or both ends of the sensor pin and the connecting pin, but the load sensor is attached to one of the sensor mounting members. Various modes are possible, such as being arranged on the side surface side, fixing the shaft-like member to the sensor arrangement member, and providing a direction changing mechanism between the main body member and the connecting pin. In the case where the sensor arrangement member is constituted by a pair of parallel plate members which are arranged apart from each other by a predetermined size and are integrally connected, for example, between the pair of plate members. It is also possible to dispose a load sensor, fix both ends of the shaft-shaped member to a plate-shaped member (sensor-disposed member), and provide a direction changing mechanism between the main body member and the connecting pin.

  The rotation link of the second invention is arranged on the sensor arrangement member so as to be rotatable around the support pin at an intermediate position, for example, and the other member of the load sensor and the connection pin are relative to each other across the support pin. Although it is configured to be pivotally connected, the other member of the load sensor is connected between the support pin and the connection pin, or the connection pin is connected between the other member of the load sensor and the support pin. It is also possible to do. Further, by appropriately setting the interval (lever ratio), the operation force can be detected by boosting or attenuating.

  The connection pin guide according to the third aspect of the invention is provided, for example, so as to pass through the sensor arrangement member, and the connection pin is inserted therethrough, and the connection pin guide is provided in a long hole provided linearly in a certain direction perpendicular to the center line of the load sensor. However, a guide rail, a guide rod, or the like that guides the slide member to which the connecting pin is connected so as to be relatively rotatable may be used.

  In the seventh invention, a sensor pin is provided on the shaft center of the shaft-shaped member, and both ends of the sensor pin protrude from the sensor mounting hole. For example, the sensor pin is configured separately and provided on the shaft-shaped member. The both ends of the shaft-shaped member itself function as sensor pins and protrude from the sensor mounting holes, or cylindrical pins are formed on both end surfaces of the shaft-shaped member. Various modes are possible, such as projecting the parts integrally. When the sensor pin is configured separately from the shaft-shaped member, the sensor pin may be disposed so as to be rotatable relative to the shaft-shaped member, but may be integrally fixed to the shaft-shaped member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1A and 1B are diagrams showing an operation pedal device 10 for a vehicle service brake according to an embodiment of the present invention. FIG. 1A is a front view, and FIG. is there. This vehicle operation pedal device 10 is a case where the present invention is applied to the operation pedal device 200 of FIG. 16, and a direction changing mechanism 60 is provided between the load sensor 30 and the clevis pin 26 disposed on the operation pedal 16. Is provided. In the load sensor 30, an annular member 34 is inserted into a sensor mounting hole 28 provided at a position shifted from the clevis pin 26 toward the step 18 by a predetermined dimension, and is integrally formed with a fixed posture (phase) by a fixing bolt 62. The operation pedal 16 is fixed. The sensor pin 64 is inserted into the insertion hole 38 of the shaft-like member 36, and both end portions of the sensor pin 64 protrude laterally from the annular member 34 and the operation pedal 16, respectively. It is connected to the clevis pin 26 through the orientation changing mechanism 60. In the present embodiment, the sensor pin 64 is configured separately from the shaft-shaped member 36 and is inserted into the insertion hole 38 so as to be relatively rotatable. However, the sensor pin 64 may be configured integrally with the shaft-shaped member 36. . A connector 58 is provided at the tip of the wire harness 56, and is connected to the control circuit unit of the vehicle via the connector 58. The annular member 34 corresponds to a main body member. In addition, the operating pedal 16 provided with the load sensor 30 is one of the pair of members, and the operating rod 22 connected to the operating pedal 16 via the load sensor 30 and the direction changing mechanism 60 is the other of the pair of members. The clevis pin 26 is a connecting pin.

  The direction changing mechanism 60 mechanically changes the direction of the reaction force applied from the clevis pin 26 so that a load acts from a certain direction around the center line O of the load sensor 30. A rotation link 68 is provided on the operation pedal 16 so as to be rotatable around the pin 66. The support pin 66 is disposed on the operation pedal 16 so as to be capable of relative rotation about the axis via a bearing. Both end portions of the support pin 66 protrude to the side of the operation pedal 16 and sandwich the operation pedal 16 therebetween. A pair of rotational links 68 having the same shape symmetrically disposed on both sides are rotatably disposed at both ends of the support pin 66. The pair of rotation links 68 are respectively supported by the support pins 66 at their intermediate positions, and are connected to the clevis pin 26 at one end so as to be relatively rotatable and at the other end relative to the sensor pin 64. Connected as possible. A bush 70 is disposed around the clevis pin 26, and the pair of rotating links 68 are integrally fixed to the bush 70 and are connected to each other via the bush 70.

  The pivot link 68 and the clevis pin 26 are connected in a plan view as viewed from the axial direction of the support pin 66, that is, in the state shown in FIG. 1A, with respect to a line segment connecting the support pin 66 and the clevis pin 26. The line segment and the center line of the operating rod 22 are set at a substantially right angle so that a reaction force acts from a substantially right angle direction. In addition, the clevis pin 26 is a relief hole provided in the operation pedal 16 so that the rotation of the rotation link 68 necessary for detecting the operation force based on the deformation of the deformation member 32 of the load sensor 30 is allowed. 72 is inserted together with the bush 70 and is connected to the clevis 24 at both ends protruding from the bush 70 so as to be relatively rotatable. The escape hole 72 has an arc shape or a straight line centered on the support pin 66, but a cutout or the like reaching the edge of the operation pedal 16 can be provided instead of the escape hole 72.

  As a result, a reaction force is transmitted from the clevis pin 26 to the sensor pin 64 through the rotation link 68, and the operating rod 22, the operation pedal 16, and the shaft around the axis of the clevis pin 26 as the operation pedal 16 is depressed. Even if the relative rotation of the sensor pin 64 and the support pin in the plan view as viewed from the axial direction of the sensor pin 64 (the state shown in FIG. 1 (a)) is always applied to the shaft-like member 36 of the load sensor 30. A load is applied from a direction substantially perpendicular to the line segment connecting to 66, and the deformed portion of the deformable member 32 is maintained substantially constant.

  2A is a cross-sectional view of the load sensor 30 in the direction perpendicular to the line segment connecting the sensor pin 64 and the support pin 66 in the plan view (state shown in FIG. 1A). b) is a sectional view taken along line IIA-IIA in (a). In FIG. 2, the sensor pin 64 can rotate relative to the shaft member 36 and the rotation link 68, and the deformable member 32 is deformed as shown in FIG. As a result, although the friction is relatively rotated, for example, on the rotating link 68 side, the rotation angle is extremely small. In order to reduce friction, a bearing, a bearing, or the like can be interposed as necessary. FIGS. 3A and 3B are views corresponding to FIGS. 2A and 2B, respectively, and FIG. 3B is a cross-sectional view taken along line IIIA-IIIA in FIG.

  As described above, the annular member 34 and the shaft-like member 36 are connected to each other via the deformable member 32, and when the load applied from the outside in the radial direction, that is, the direction perpendicular to the center line O is substantially zero, it is shown in FIG. Thus, the shaft center S of the shaft-like member 36 and the sensor pin 64 is held in a state substantially coincident with the center line O of the load sensor 30, and the deformable member 32 also maintains a cylindrical shape centered on the center line O over the entire length. ing. A center line O of the load sensor 30 is a center line of the annular member 34 that is integrally fixed to the operation pedal 16. On the other hand, when the reaction force of the operating rod 22 is applied to the sensor pin 64 via the direction changing mechanism 60 in accordance with the stepping operation of the operation pedal 16, the radial direction, specifically, between the annular member 34 and the shaft-like member 36. 2, a load is applied to the shaft member 36 in the left direction (substantially left direction in FIG. 1 (a)) in FIG. 2, and the deformable member 32 disposed therebetween is shown in FIG. As shown in FIG. An annular space is provided between the annular member 34 and the shaft-like member 36 so as to allow relative displacement in the radial direction between them and shear deformation of the deformation member 32. It is made of a metal material such as ferritic stainless steel that can be elastically deformed by receiving a load, and is sheared and deformed according to the operation force of the operation pedal 16 when the operation pedal 16 is stepped on. Although the deformation amount of the deformation member 32 is extremely small and hardly affects the stepping stroke of the operation pedal 16, the deformation amount is shown enlarged in the drawing for easy understanding. The other drawings are the same.

  In order to detect the shear strain of the deformable member 32, as shown in FIG. 4, four strain resistance elements 40a to 40d are attached to the outer peripheral surface of the deformable member 32 as strain detecting elements. As the strain resistance elements 40a to 40d, for example, a thin film type or thick film type semiconductor strain gauge, a normal strain gauge, or the like is preferably used. 4 (a) is a view corresponding to FIG. 3 (a), in which the deformable member 32 is subjected to shear deformation, (b) is a plan view seen from above (a), and (c). FIG. 4 is a development view of the outer peripheral surface of the deformable member 32. The four strain resistance elements 40a to 40d are pulled in the axial direction by the shear strain in two symmetrical positions with the center line O (S) in the direction in which the deformable member 32 generates a shear strain due to an external load. One by one is provided in the part to be deformed and compressed and deformed. In this embodiment, the direction of the load acting on the load sensor 30 by the direction changing mechanism 60 is substantially constant, that is, the left-right direction in FIG. 1 (a), and FIG. 2, FIG. 3, and FIG. (b), the strain resistance elements 40a to 40d need not be so large, but in consideration of the assembly workability of the deformable member 32 and the like, in the circumferential direction of the deformable member 32 For example, it has a length dimension that covers an angle range of about 90 °.

  The strain resistance elements 40a to 40d are connected by the conductive circuit pattern 50 (see FIG. 4 (c)) to form the bridge circuit shown in FIG. By connecting a power source E between the terminal 42 and the GND (ground) electrode 44, an electrical signal corresponding to the strain is output between the pair of output electrodes 46 and 48. A wire harness 56 (see FIG. 1) connected to these electrodes is connected from the load sensor 30 in order to connect the power supply E to the power supply electrode 42 and take out electrical signals output from the output electrodes 46 and 48. It extends and is connected to a control circuit section of the vehicle via a connector 58. An insulating film 52 (refer to FIG. 4C) such as glass paste is provided in advance on the outer peripheral surface of the deformable member 32, and the conductive circuit pattern 50 is formed thereon by a conductor such as silver. In addition, the strain resistance elements 40a to 40d are integrally provided by firing or the like so that a part thereof is in contact with the conductive circuit pattern 50. It is also possible to provide a control circuit unit inside the load sensor 30. In this embodiment, a full bridge circuit is used. However, for example, when a deforming member in which only a portion that receives a load based on the operation force of the operation pedal 16 is formed in an arc shape is used, a half bridge circuit is used. You can also.

In such a vehicle operating pedal device 10, the load sensor 30 for electrically detecting the operating force based on relative displacement between the annular member 34 and the shaft-like member 36 is disposed on the rotating connection 20, the The operating force is detected by transmitting the reaction force via the clevis pin 26 of the rotary connecting portion 20, and the load sensor 30 is disposed in the sensor mounting hole 28 formed in the operating pedal 16. Therefore, the entire operation pedal device 10 can be configured simply and compactly, and does not affect the mounting conditions of the conventional pedal device. Further, the peripheral members such as the operating rod 22, the clevis 24, and the clevis pin 26 can be the same as the conventional pedal device, and therefore can be configured at low cost.

  On the other hand, the clevis pin 26 is inserted through the escape hole 72 so as to be relatively displaceable with respect to the operation pedal 16, and a direction changing mechanism 60 is provided between the sensor pin 64 of the load sensor 30 and the clevis pin 26. Even when the operation pedal 16 and the operating rod 22 are relatively rotated around the axis of the clevis pin 26 as the operation pedal 16 is depressed, the reaction force applied to the load sensor 30 from the clevis pin 26 is always substantially constant. Since it is made to act in the direction (substantially leftward in FIG. 1 (a)), the deformed portion of the deformable member 32 is kept constant, the detection accuracy of the operating force is improved, and the detection accuracy is not uniform. It is suppressed and high reliability can be obtained.

  In this embodiment, a rotation link 68 is provided as the direction changing mechanism 60 so as to be rotatable around the axis of the support pin 66, and the sensor pin 64 and the clevis pin 26 of the load sensor 30 are respectively connected to the rotation link 68. Since it only needs to be connected to both ends so as to be capable of relative rotation, the apparatus is simple and inexpensive, and is compact in the vehicle front-rear direction, which is the direction in which the operating pedal 16 is depressed or the operating rod 22 is depressed. Can be configured. By appropriately setting the lever ratio of the rotating link 68, that is, the ratio of the dimension from the support pin 66 to the sensor pin 64 and the dimension from the support pin 66 to the clevis pin 26, the operating force (reaction force) is boosted or It can also be attenuated and detected.

In the present embodiment, the operation pedal 16 connected to the operating rod 22 via the load sensor 30 and the direction changing mechanism 60 is used as a sensor arrangement member, and the load sensor 30 is arranged on the operation pedal 16. The final operating force (output) transmitted from the clevis pin 26 to the operating rod 22 is detected by the load sensor 30, and the braking force generated according to the output of the operating rod 22 can be detected with high accuracy.

  The annular member 34 is integrally fixed in the sensor mounting hole 28 provided in the operation pedal 16, and the sensor pin 64 is provided on the shaft center S of the shaft-like member 36 and protrudes to both sides of the sensor mounting hole 28. Since the pivot links 68 are respectively provided between the both ends of the clevis pin 26 that are inserted through the escape hole 72 and project to both sides of the operation pedal 16, the vehicle operation pedal is provided. The apparatus 10 can be configured in a simple and compact manner, and the load (reaction force) of the clevis pin 26 is applied substantially evenly to the shaft-like member 36 of the load sensor 30, and the rotational moment such as torsion is suppressed to further improve detection accuracy. To do.

  Next, another embodiment of the present invention will be described. In the following embodiments, parts that are substantially the same as those in the above embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  The vehicle operation pedal device 80 of FIG. 6 includes an intermediate lever 82, and the operation force is transmitted from the operation pedal 16 to the operating rod 22 via the intermediate lever 82. The intermediate lever 82 is rotatably disposed on the pedal support 12 by a support pin 84 parallel to the support shaft 14 and is connected to the operation pedal 16 via a connection link 86. It is mechanically rotated around the support pin 84 in conjunction with the stepping operation. The connecting link 86 is connected to the operation pedal 16 and the intermediate lever 82 through a pair of connecting pins 88 and 90 parallel to the support shaft 14 at both ends thereof, respectively, so as to be relatively rotatable.

In addition, the operating rod 22 is connected to the distal end portion of the intermediate lever 82 via a rotation connecting portion 92. The rotation connecting portion 92 is configured in the same manner as the rotation connecting portion 20. A load sensor 30 is disposed in a sensor mounting hole provided in the intermediate lever 82, and a sensor pin 64 of the load sensor 30. Is connected to the clevis pin 26 via a direction changing mechanism 60. Therefore, this embodiment can provide the same effects as those of the previous embodiment. 6 is the same as the case where the operation pedal 16 is replaced with the intermediate lever 82 in FIG. 1B, and the intermediate lever 82 corresponds to a sensor arrangement member. The intermediate lever 82 provided with the load sensor 30 is one of the pair of members, and the operating rod 22 connected to the intermediate lever 82 via the load sensor 30 and the direction changing mechanism 60 is the other of the pair of members. The clevis pin 26 is a connecting pin.

  The vehicle operation pedal device 100 of FIG. 7 is different in the direction changing mechanism 102 from the vehicle operation pedal device 10 of FIG. FIGS. 7A and 7B are views corresponding to FIGS. 1A and 1B, FIG. 7A is a front view, and FIG. 7B is an enlarged view of the section VIIA-VIIA in FIG. It is. The direction changing mechanism 102 includes a connecting pin guide 104 that is provided on the operation pedal 16 and defines a moving path of the clevis pin 26, and a linear link 106 that connects the clevis pin 26 and the sensor pin 64 of the load sensor 30. In conjunction with the movement of the clevis pin 26, the sensor pin 64 is displaced in a certain direction. That is, the connecting pin guide 104 is a long hole provided in a straight line in a direction (constant direction) perpendicular to the center line O of the load sensor 30, and the clevis pin 26 is inserted through the long hole and guided to the long hole. In this way, it can be moved in a certain direction. The linear motion links 106 correspond to interlocking members and are symmetrically arranged on both sides with the operation pedal 16 in between. The one end is connected to the clevis pin 26 so as to be relatively rotatable and the other end. The sensor pin 64 is connected to the sensor pin 64 so as to be relatively rotatable.

  In such a vehicular operating pedal device 100, the clevis pin 26 is guided by the connecting pin guide 104 and linearly moved in a certain direction orthogonal to the center line O of the load sensor 30. Since the sensor pin 64 connected to the clevis pin 26 via the link 106 is also linearly moved in the fixed direction, the operation pedal 16 and the operating rod 22 are rotated around the axis of the clevis pin 26 as the operation pedal 16 is depressed. The reaction force applied to the load sensor 30 from the clevis pin 26 via the linear motion link 106 is always applied in a constant direction even when the clevis pin 26 is rotated relative to each other. This improves the detection accuracy of operating force and suppresses variations in detection accuracy, resulting in high reliability. It becomes so that.

  In addition, since the connecting pin guide 104 for moving the clevis pin 26 in a certain direction is provided, and the clevis pin 26 and the sensor pin 64 need only be connected by the linear link 106, the apparatus is simple, inexpensive, and compact.

  In addition, since the load sensor 30 is disposed in the sensor mounting hole 28 of the operation pedal 16, the vehicle operation pedal device 100 can be configured in a compact manner. can get.

  The vehicle operation pedal device 110 in FIG. 8 includes an intermediate lever 82 as in the vehicle operation pedal device 80 in FIG. 6, and is a rotation that is a connecting portion between the intermediate lever 82 and the operating rod 22. In this case, the load sensor 30 is disposed in the connecting portion 92. The load sensor 30 is disposed in the sensor mounting hole provided in the intermediate lever 82, and the sensor pin 64 of the load sensor 30 is oriented in the direction shown in FIG. It is connected to the clevis pin 26 through the conversion mechanism 102. Therefore, also in the present embodiment, the same operational effects as those of the vehicle operation pedal device 100 of FIG. 7 can be obtained. 8 is the same as the case where the operation pedal 16 is replaced with the intermediate lever 82 in FIG. 7B.

  The vehicle operation pedal device 120 in FIG. 9 is different from the vehicle operation pedal device 100 in FIG. 7 in the configuration and arrangement of the load sensor 121 and the direction conversion mechanism 122. 9 (a) and 9 (b) are views corresponding to FIGS. 7 (a) and 7 (b), FIG. 9 (a) is a front view, and FIG. 9 (b) is an enlarged view of the IXA-IXA cross section in FIG. is there. In this load sensor 121, a stepped columnar body member 134 is integrally fixed to a case 124, and a shaft-shaped member 136 is provided concentrically with the body member 134 via a cylindrical deformation member 138. Thus, while being fixed integrally to the operation pedal 16 by the fixing bolt 126 via the case 124, the shaft-like member 136 protrudes into the accommodation hole 128 provided in the operation pedal 16, and the deformation member The main body member 134 is allowed to be relatively displaced in the direction perpendicular to the axis by the shear deformation of 138. The deformation member 138 is configured in the same manner as the deformation member 32, and the strain resistance elements 40a to 40d are attached to the outer peripheral surface thereof as strain detection elements.

  In addition, the direction changing mechanism 122 includes a connecting pin guide 130 provided on the operation pedal 16 and defining a moving path of the clevis pin 26, and a slide member 132 interposed between the clevis pin 26 and the shaft-like member 136. The shaft-shaped member 136 is displaced in a certain direction in conjunction with the movement of the clevis pin 26. That is, the connecting pin guide 130 is a long hole provided in a straight line in a direction (constant direction) perpendicular to the center line O of the load sensor 121, and the clevis pin 26 is inserted through the long hole and guided to the long hole. While being done, it can be moved in a certain direction. Between the connecting pin guide 130 and the receiving hole 128, there is provided a linear guide groove for connecting them and guiding the slide member 132 in the same direction, and the slide member 132 is connected to the clevis pin 26. The guide groove is disposed between the shaft member 136 and the shaft member 136.

  Also in such a vehicle operation pedal device 120, the clevis pin 26 is guided by the connecting pin guide 130 and linearly moved in a certain direction orthogonal to the center line O of the load sensor 121, and the slide member Since the shaft-shaped member 136 is also displaced in the predetermined direction via 132, even if the operation pedal 16 and the operating rod 22 are relatively rotated around the axis of the clevis pin 26 as the operation pedal 16 is depressed. The reaction force applied from the clevis pin 26 to the load sensor 121 via the slide member 132 is always applied in a constant direction, and the deformation location of the deformation member 138 is maintained constant, thereby improving the detection accuracy of the operation force. At the same time, variations in detection accuracy are suppressed and high reliability can be obtained.

  Further, since the connecting pin guide 130 for moving the clevis pin 26 in a certain direction is provided, and the slide member 132 only needs to be disposed between the clevis pin 26 and the shaft-like member 136, the apparatus is simple, inexpensive and compact. The same effects as the vehicle operation pedal device 100 of FIG.

  The vehicle operation pedal device 140 in FIG. 10 includes an intermediate lever 82 as in the vehicle operation pedal device 80 in FIG. 6, and is a rotation that is a connecting portion between the intermediate lever 82 and the operating rod 22. This is a case where the load sensor 121 is disposed in the connecting portion 92, and the load sensor 121 is disposed on one side surface of the intermediate lever 82 via the case 124, and the shaft-shaped member 136 of the load sensor 121 includes The reaction force of the clevis pin 26 is applied via the direction changing mechanism 122 of FIG. Therefore, also in the present embodiment, the same operational effects as those of the vehicle operation pedal device 120 of FIG. 9 can be obtained. 10 is the same as the case where the operation pedal 16 is replaced with the intermediate lever 82 in FIG. 9B.

  The vehicle operation pedal device 150 in FIG. 11 is different from the vehicle operation pedal device 10 in FIG. 1 in a direction changing mechanism 152. (A) and (b) in FIG. 11 are views corresponding to (a) and (b) in FIG. 1, (a) is a front view, and (b) is an enlarged view of the XIA-XIA cross section in (a). is there. The operation pedal 16, which is a sensor arrangement member, is provided with a long guide hole 154 that is continuous with the sensor mounting hole 28, and the first guide member 156 and the second guide member that constitute the direction changing mechanism 152. 158 is disposed, and the clevis pin 26 and the intermediate pin 160 are inserted therethrough. The first guide member 156 functions as a connecting pin guide that defines the movement path of the clevis pin 26, and is provided in a pair on both sides of the clevis pin 26, and is engaged with a pulley 162 that is rotatably arranged on the clevis pin 26. As a result, the clevis pin 26 is guided in a straight line direction which is substantially the left-right direction in FIG. The second guide member 158 functions as an intermediate guide that moves the intermediate pin 160 as an intermediate slide member in a straight line in a direction (fixed direction) orthogonal to the center line O of the load sensor 30. By being engaged with a pulley 164 which is rotatably arranged, the intermediate pin 160 is guided in a straight line direction which is substantially the left-right direction in FIG.

  The clevis pin 26 and the intermediate pin 160 are coupled to a pair of interlocking links 166 disposed symmetrically on both sides of the operation pedal 16 so as to be capable of relative rotation, thereby interlocking with the movement of the clevis pin 26. Thus, the intermediate pin 160 is displaced in a certain direction. Further, the intermediate pin 160 and the sensor pin 64 are coupled to a pair of linear motion links 168 that are symmetrically disposed on both sides with the operation pedal 16 in between, whereby the intermediate pin is interlocked with the movement of the clevis pin 26. 160, and further the sensor pin 64 is displaced in a certain direction. In this embodiment, an interlocking member is configured including the intermediate pin 160, the interlocking link 166, and the linear motion link 168. The linear motion link 168 is integrally fixed to the intermediate pin 160, and is connected to the sensor pin 64 so as to be relatively rotatable.

  Also in such a vehicle operation pedal device 150, the clevis pin 26 is guided by the first guide member 156 and moved in a straight line direction, whereby the sensor pin is connected via the interlocking link 166, the intermediate pin 160, and the linear motion link 168. 64 is displaced in a fixed direction perpendicular to the center line O of the load sensor 30, and therefore the operation pedal 16 and the operating rod 22 are connected to the axis of the clevis pin 26 as the operation pedal 16 is depressed. The reaction force applied to the load sensor 30 from the clevis pin 26 is always applied in a constant direction even when the clevis pin 26 is relatively rotated around, so that the deformation location of the deformation member 32 is maintained constant, and the detection accuracy of the operation force is maintained. As a result, variation in detection accuracy is suppressed and high reliability can be obtained.

  Further, the movement path of the clevis pin 26 is defined by the first guide member 156, and the intermediate pin 160 moved in a certain direction by the second guide member 158 and the clevis pin 26 are connected by the interlocking link 166, and the intermediate pin 160 Since the reaction force is further transmitted to the sensor pin 64 of the load sensor 30 via the linear motion link 168, the degree of freedom in setting the connection position of the clevis pin 26, the position of the load sensor 30 and the like is high. Become.

  In addition, since the load sensor 30 is disposed in the sensor mounting hole 28 of the operation pedal 16, the vehicle operation pedal device 150 can be configured in a compact manner. can get.

  The vehicle operation pedal device 170 in FIG. 12 includes an intermediate lever 82 as in the vehicle operation pedal device 80 in FIG. 6, and is a rotation that is a connecting portion between the intermediate lever 82 and the operating rod 22. This is a case where the load sensor 30 is disposed in the connecting portion 92. The intermediate lever 82 is provided with a guide hole 154, a first guide member 156, a second guide member 158, and the like, and the direction changing mechanism 152 in FIG. The reaction force applied from the clevis pin 26 to the load sensor 30 is always applied in a certain direction. Therefore, also in this embodiment, the same effect as that of the vehicle operation pedal device 150 of FIG. 11 can be obtained. 12 is the same as the case where the operation pedal 16 is replaced with the intermediate lever 82 in FIG. 11B.

The vehicle operation pedal device 180 shown in FIG. 13 differs from the vehicle operation pedal device 80 shown in FIG. 6 in the arrangement position of the load sensor 30, and the connection link 86 is connected to the intermediate lever via the connection pin 90. In the rotation connecting portion 182 connected to 82, the load sensor 30 and the direction changing mechanism 60 are arranged on the intermediate lever 82 so as to detect the operating force transmitted from the connecting pin 90 to the intermediate lever 82. ing. That is, the load sensor 30 is disposed in the sensor mounting hole 184 provided in the intermediate lever 82, and the sensor pin 64 of the load sensor 30 is connected to the connecting pin 90 via the direction changing mechanism 60. The intermediate lever 82 is provided with a clearance hole 186 that allows the connecting pin 90 to rotate about the axis of the support pin 66, and the operating force applied from the connecting pin 90 to the load sensor 30 is always constant. It can be applied to the direction. Therefore, also in this embodiment, the same operational effects as those of the embodiments of FIGS. 1 and 6 can be obtained. (A) and (b) in FIG. 13 are diagrams corresponding to (a) and (b) in FIG. 1, (a) is a front view, and (b) is an enlarged view of the XIIIA-XIIIA section in (a). is there. In this embodiment, the intermediate lever 82 provided with the load sensor 30 is a pair of members, while the connection link 86 connected to the intermediate lever 82 via the load sensor 30 and the direction changing mechanism 60 is a pair of members. On the other hand, the connecting pin 90 is a connecting pin according to claims 1 and 12.

  The connecting link 86 is rotatably connected to the operation pedal 16 via the connecting pin 88, and the intermediate lever 82 is rotatably attached to the pedal support 12 via the support pin 84. It is also possible to apply the present invention to the rotating connecting portion and to detect a load applied to the connecting pin 88 and the support pin 84 as an operating force.

  14 and 15 are views showing a load sensor 190 used in place of the load sensor 30 in the embodiment of FIG. 1, and are cross-sectional views corresponding to FIGS. 2 and 3, and FIG. Is a longitudinal sectional view parallel to the center line O, (b) is a XIVA-XIVA sectional view, and an XVA-XVA sectional view in (a). The load sensor 190 includes a cylindrical deformable member 192 and detects a load applied in the radial direction of the deformable member 192. An annular member 194 is disposed on the outer peripheral side of the deformable member 192. Yes. The annular member 194 is integrally assembled in the sensor mounting hole 28 with a fixed posture (phase) by press-fitting, bolts, leaf springs, or the like, and a part around the center line of the deformable member 192 (FIGS. 14 and 15). The right side wall portion in (1) is integrally held by welding or the like. Then, the shaft-shaped member 196 is inserted through the cylindrical shape of the deformable member 192, and the rotation link 68 of the direction changing mechanism 60 is connected. It is also possible to use the sensor pin 64 as the shaft-like member 196.

  When the external load is substantially zero, the load sensor 190 is held in a state where the annular member 194 is substantially concentric with the shaft center S of the shaft-shaped member 196 as shown in FIG. The side of the side wall portion opposite to the side fixed to the annular member 194, that is, the inner peripheral surface of the left side wall portion in FIG. . This is defined by the operating rod 22 being pressed to the right in FIG. 1A by the action of a return spring or the like (not shown), and the operation pedal 16 abutting against a stopper (not shown) and positioned at the initial position. In this state, the deformable member 192 has a substantially circular cylindrical shape. On the other hand, when a radial load is applied between the annular member 194 and the shaft-like member 196 by the reaction force of the operating rod 22 in accordance with the stepping operation of the operation pedal 16, the shaft-like member 196 is applied to the annular member 194. 14 and 15 is relatively displaced in the left direction, and the deformable member 192 is tensilely deformed into an elliptical shape as shown in FIG. The annular member 194 is sized in an annular inner space so as to allow relative displacement with the shaft-like member 196 and tensile deformation of the deformable member 192, and the deformable member 192 is loaded from the radial direction. It is comprised by metal materials, such as a ferritic stainless steel which can be elastically deformed by receiving, and it is made to tensile-deform according to the operation force with the stepping operation of the operation pedal 16. FIG.

  In order to detect the tensile strain of the deformable member 192, the outer peripheral surface of the deformable member 192, that is, the side wall portion positioned vertically in FIG. The strain resistance element is fixed. An insulating film such as glass paste is provided in advance on the outer peripheral surface of the deformable member 192, and a conductive circuit pattern is formed thereon with a conductive material such as silver, and the conductive circuit is further formed. The strain resistance elements are integrally provided by firing or the like so that a part thereof is in contact with the pattern.

  The size and arrangement position of the strain resistance element are appropriately set in consideration of assembling workability and the like, but in the present invention, a load is always applied from a certain direction regardless of the operation amount of the operation pedal 16, Since a certain portion of the deformable member 192 is deformed, high detection accuracy can be stably obtained even with a relatively small one.

  The load sensor 190 can also be used in place of the load sensor 30 in other embodiments shown in FIG.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.

It is a figure which shows an example of the vehicle operating pedal apparatus for service brakes to which this invention was applied, (a) is a front view, (b) is an enlarged view of the IA-IA cross section in (a). 2A and 2B are diagrams illustrating a load sensor according to the embodiment of FIG. 1, in which FIG. 1A is a longitudinal sectional view parallel to the center line O, and FIG. 2B is a sectional view taken along the line IIA-IIA in FIG. FIG. 3 is a view showing a state where the operating pedal is stepped on from the state of FIG. 2 and the deforming member is sheared and deformed by the reaction force of the operating rod, (a) is a longitudinal sectional view parallel to the center line O, (b) is It is IIIA-IIIA sectional drawing in (a). (a) is an enlarged cross-sectional view of the deformable member in FIG. 3 (a), (b) is a plan view seen from above (a), (c) is a development view of the deformable member, It is a figure explaining the provided strain resistance element. FIG. 5 is a circuit diagram showing a bridge circuit formed by connecting the strain resistance elements shown in FIG. 4C by a conductive circuit pattern. The present invention is applied to a vehicular operation pedal device having an intermediate lever, and the load sensor and the direction changing mechanism of FIG. 1 are disposed at a rotating connection portion between the intermediate lever and the operating rod. It is a front view corresponding to). 4A and 4B are views for explaining still another embodiment of the present invention, in which FIG. 4A is a front view corresponding to FIG. 1A, and FIG. 5B is an enlarged view of a section VIIA-VIIA in FIG. The present invention is applied to a vehicular operation pedal device having an intermediate lever, and the load sensor and the direction changing mechanism of FIG. 7 are disposed at the rotational connection portion between the intermediate lever and the operating rod. It is a front view corresponding to). 4A and 4B are diagrams illustrating still another embodiment of the present invention, in which FIG. 5A is a front view corresponding to FIG. 1A, and FIG. 5B is an enlarged view of a section IXA-IXA in FIG. The present invention is applied to a vehicular operation pedal device having an intermediate lever, and the load sensor and the direction changing mechanism of FIG. 9 are disposed at the rotational connection portion between the intermediate lever and the operating rod. It is a front view corresponding to). 4A and 4B are diagrams illustrating still another embodiment of the present invention, in which FIG. 5A is a front view corresponding to FIG. 1A, and FIG. 5B is an enlarged view of a cross section XIA-XIA in FIG. The present invention is applied to a vehicle operation pedal device having an intermediate lever, and the load sensor and the direction changing mechanism of FIG. 11 are disposed at the rotational connection portion between the intermediate lever and the operating rod. It is a front view corresponding to). The present invention is applied to an operation pedal device for a vehicle having an intermediate lever, and the load sensor and the direction changing mechanism of FIG. 1 are arranged at the rotation connecting portion between the intermediate lever and the connecting link. 1 is a front view corresponding to (a) of FIG. 1, and (b) is an enlarged view of a section XIIIA-XIIIA in (a). It is a figure explaining another example of a load sensor, and is a figure corresponding to Drawing 2, (a) is a longitudinal section parallel to center line O, and (b) is a XIVA-XIVA sectional view in (a). . FIG. 15 is a view showing a state where the operating pedal is stepped on from the state of FIG. 14 and the deforming member is tensilely deformed into an oval shape by the reaction force of the operating rod, (a) is a longitudinal sectional view parallel to the center line O; b) is a cross-sectional view of XVA-XVA in (a). BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the background art of this invention, (a) is a front view of the operation pedal apparatus for vehicles provided with the load sensor of the same structure as FIG. 1, (b) is an expansion of the XVIA-XVIA cross section in (a) FIG.

Explanation of symbols

  10, 80, 100, 110, 120, 140, 150, 170, 180: Vehicle operation pedal device 16: Operation pedal (sensor arrangement member) 20, 92, 182: Rotating connecting portion 22: Operating rod (reaction force) 26): Clevis pin (connection pin) 28, 184: Sensor mounting hole 30, 121, 190: Load sensor 32, 138, 192: Deformation member 34, 194: Annular member (main body member) 36, 136, 196: Shaft Members 40a to 40d: Strain resistance elements (strain detection elements) 60, 102, 122, 152: Direction changing mechanism 64: Sensor pin 66: Support pin 68: Rotating link 82: Intermediate lever (sensor arrangement member) 86: Connection link 90: connecting pin 104, 130: connecting pin guide 106: linear motion link ( Interlocking member) 132: Slide member 134: Main body member 156: First guide member (connection pin guide) 158: Second guide member (intermediate guide) 160: Intermediate pin (intermediate slide member, interlocking member) 166: Interlocking link (interlocking) Member) O: Center line of load sensor S: Center axis of sensor pin (shaft-shaped member)

Claims (12)

An operation pedal that is movably disposed on a pedal support fixed to the vehicle and is stepped on by a driver;
A reaction force member to which an operation force of the operation pedal is transmitted and a reaction force corresponding to the operation force is applied;
A load sensor for electrically detecting the pre-SL operating force,
In a vehicle operation pedal device with a load sensor having
The load sensor is disposed across a shaft-shaped member, a body member disposed so as to be capable of relative displacement in a direction perpendicular to the shaft center of the shaft-shaped member, and the shaft-shaped member and the body member. And a strain sensing element fixed to the deformable member, and the reaction force causes the shaft-shaped member and the main body member to be displaced relative to each other in a direction perpendicular to the axis of the shaft-shaped member. When the member is deformed, the deformation of the deformable member is detected by the strain sensing element.
The load sensor is composed of the operation pedal and the reaction force member itself, or other members interposed so as to connect the operation pedal and the reaction force member, and a pair of members that transmit the operation force . While either one of the shaft-like member and the main body member is fixed to any one of the sensor arrangement members,
Between the other of the other and the pair of members of the shaft-like member and the body member prior Symbol load sensor, is relatively pivotably connected through the connecting pin to the other of said pair of members, the connecting while transmitting the operating force or the reaction force from the pin to該荷heavy sensors, of the operating force or the reaction force such that the operating force or reaction force is a constant direction or al work against該荷heavy sensor orientation mechanically conversion operation pedal equipment for load-sensor-equipped vehicle, characterized in that is provided with a direction conversion mechanism. The orientation changing mechanism is arranged on the sensor arrangement member so as to be rotatable around a support pin parallel to the connection pin, and the other of the shaft-like member and the main body member of the load sensor, and the connection pin 2. The vehicle with a load sensor according to claim 1, wherein the vehicles are connected to each other and are turned around the support pin based on the operation force or the reaction force applied from the connection pin. Operation pedal device. The orientation changing mechanism includes a connection pin guide that is provided on the sensor arrangement member and defines a movement path of the connection pin, and the shaft member and the body member of the load sensor in conjunction with the movement of the connection pin. The vehicle operating pedal device with a load sensor according to claim 1, further comprising: an interlocking member that displaces the other of the two in the predetermined direction. The connecting pin guide is provided to move the connecting pin in the fixed direction,
The vehicle operating pedal device with a load sensor according to claim 3, wherein the interlocking member is a linear motion link that connects the other of the shaft-like member and the main body member of the load sensor and the connecting pin. . The connecting pin guide is provided to move the connecting pin in the fixed direction,
The operation pedal device for a vehicle with a load sensor according to claim 3, wherein the interlocking member is a slide member that is integrally moved with the connecting pin in the predetermined direction. The interlocking member includes an intermediate slide member that is moved in the predetermined direction by an intermediate guide provided on the sensor arrangement member, and an interlocking link that connects the intermediate slide member and the connecting pin. The operation pedal device for vehicles with a load sensor according to claim 3. The sensor arrangement member is a plate-like member connected to the reaction force member via the load sensor and the direction changing mechanism, and a sensor mounting hole is provided therethrough,
The load sensor is disposed so that the body member is integrally fixed in the sensor mounting hole, and sensor pins provided on the shaft center of the shaft-shaped member protrude to both sides of the sensor mounting hole. And
The vehicle operation pedal device with a load sensor according to any one of claims 1 to 6, wherein the direction changing mechanism is provided between both ends of the sensor pin and the connecting pin. The operation pedal is disposed on the pedal support so as to be rotatable around a support axis,
The said sensor arrangement | positioning member is this operation pedal. The operation pedal apparatus for vehicles with a load sensor of any one of Claims 1-7 characterized by the above-mentioned. An intermediate lever that is rotatably disposed on the pedal support, is connected to the operation pedal via a connection link, and is connected to the reaction force member via the load sensor and the direction changing mechanism. And
The vehicle operation pedal device with a load sensor according to any one of claims 1 to 7, wherein the sensor arrangement member is the intermediate lever. The deformable member has a cylindrical shape, and one end and the other end of the cylindrical shape are integrally fixed to the main body member and the shaft-shaped member, respectively, and the main body member is based on the reaction force. The load sensor according to any one of claims 1 to 9, wherein a shear strain generated in the deformable member is detected by the strain detecting element when the shaft and the shaft-like member are relatively displaced. Operated pedal device for vehicles with. The deformable member has a cylindrical shape, the main body member integrally holds a part around the center line of the deformable member, and the shaft-shaped member extends inside the cylindrical shape of the deformable member. The tensile strain generated in the deformable member is detected by the strain detecting element when the main body member and the shaft-like member are relatively displaced based on the reaction force. The vehicle operating pedal device with a load sensor according to any one of claims 1 to 9. An operation member to be moved,
A reaction force member to which an operation force of the operation member is transmitted and a reaction force corresponding to the operation force is applied;
A load sensor for electrically detecting the pre-SL operating force,
In an operating device with a load sensor having
The load sensor is disposed across a shaft-shaped member, a body member disposed so as to be capable of relative displacement in a direction perpendicular to the shaft center of the shaft-shaped member, and the shaft-shaped member and the body member. And a strain sensing element fixed to the deformable member, and the reaction force causes the shaft-shaped member and the main body member to be displaced relative to each other in a direction perpendicular to the axis of the shaft-shaped member. When the member is deformed, the deformation of the deformable member is detected by the strain sensing element.
The load sensor is composed of the operation member and the reaction force member itself, or another member interposed so as to connect the operation member and the reaction force member, and a pair of members that transmit the operation force . While either one of the shaft-like member and the main body member is fixed to any one of the sensor arrangement members,
Between the other of the other and the pair of members of the shaft-like member and the body member prior Symbol load sensor, is relatively pivotably connected through the connecting pin to the other of said pair of members, the connecting while transmitting the operating force or the reaction force from the pin to該荷heavy sensors, of the operating force or the reaction force such that the operating force or reaction force is a constant direction or al work against該荷heavy sensor orientation An operation device with a load sensor, characterized in that a direction conversion mechanism for mechanically converting the position is provided.

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