JP2009181442A - Operation pedal device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress friction or buckling of a turning connection part at which a connection pin is arranged while keeping thin the plate thickness of an operation pedal in a hollow structure. <P>SOLUTION: A reinforcement member 44 at which a pin insertion hole 52 is formed is arranged between parallel flat parts 32a and 34a of a pair of half bodies 32 and 34, and a part of the outer peripheral edge of the reinforcement member 44 is almost matched with side edges 32a and 34e of the parallel flat parts 32a and 34a, and integrally weld-bonded to the side edges 32e and 34e so that reaction force to be applied to the pair of parallel flat parts 32a and 34a can be satisfactorily distributed from the first connection pin 38 via the reinforcement member 44, and that rigidity can be improved. Thus, buckling due to the reaction force is suppressed while keeping thin the plate thickness of the half-bodies 32 and 34. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an operation pedal device for a vehicle such as a brake pedal device, and more particularly to a connection structure of a rotation connection portion that transmits an operation force via a connection pin.

(a) an operation pedal that is disposed on a pedal support fixed to the vehicle so as to be rotatable about a support axis, and is operated by a driver, and (b) an operation force of the operation pedal is transmitted. A reaction force member to which a reaction force corresponding to the operation force is applied; and (c) an intermediate member that transmits the operation force between the operation pedal and the reaction force member or between the operation pedal and the reaction force member. A rotating connecting portion that is interposed between and connected to each other so as to be relatively rotatable around a connecting pin parallel to the support axis, and that transmits the operating force through the connecting pin. The operation pedal device for vehicles is widely used, for example, for a brake pedal device for a service brake or a parking brake. The devices described in Patent Documents 1 and 2 are examples thereof, and each of the operation pedals has a hollow structure, and the rotation connecting portion of the operation pedal has a pair of positions located on both sides in the vehicle width direction. A pair of connecting holes are provided on a side wall on a straight line substantially parallel to the support shaft, the connecting pin is inserted through the pair of connecting holes, and a reaction member is connected through a clevis or the like. It has come to be.
JP 2007-122610 A Japanese Patent Laid-Open No. 11-78817

  However, in the structure in which the connecting pin is directly inserted into the connecting hole provided in the pair of side walls of the operation pedal in this way, not only the workability when inserting the connecting pin to the opposite connecting hole is bad, but also the connecting hole Since reaction force acts intensively on the hole edge, there is a risk of wear and buckling, and it is necessary to increase the thickness of the operation pedal. In Patent Document 1, a collar is fixed to one of the connection holes, which improves workability when inserting the connection pin and increases the strength. However, the opposite side wall is still worn, buckled, or the like. Is a problem.

  On the other hand, for example, countermeasures as shown in (a) to (c) of FIG. 10 can be considered. 10 (a) to 10 (c) are cross-sectional views showing the rotation connecting portion 112 when the push rod 110, which is a reaction force member, is directly connected to the operation pedal 100. The operation pedal 100 includes: Similar to the above-mentioned Patent Document 1, it is constituted by a pair of halves 102 and 104, and the side edges thereof, that is, the front and rear or upper and lower edges of the vehicle are integrally welded to each other, and the connecting pin 106 and a clevis 108 are coupled to the push rod 110 so as to be relatively rotatable. And (a) is a case where burring holes 114 and 116 in which the peripheral edge portions of the halves 102 and 104 functioning as a pair of side walls project inward as connecting holes are provided. Since reaction force concentrates on 114 and 116, problems such as wear and buckling cannot be solved sufficiently. In addition, since it is difficult to align the pair of burring holes 114 and 116, it is difficult to manage the dimensional accuracy and the manufacturing cost is increased. (b) is a case where the cylindrical collar 120 is disposed across the burring holes 114, 116, and the workability when inserting the connecting pin 106 is improved and the wear is improved. The reaction force concentrates on the periphery of the burring holes 114 and 116, so that there is still a risk of buckling, and the pair of halves 102 and 104 are fixed by welding or the collar 120 is stretched over them. For example, it is difficult to align the pair of burring holes 114 and 116 when they are arranged, which makes it difficult to manage the dimensional accuracy and increases the manufacturing cost. (C) shows the case where the collars 130 and 132 are provided in a simple connection hole, but there is still a risk of buckling at the periphery of the hole, and the pair of halves 102 and 104 are fixed by welding. It is difficult to manage the dimensional accuracy, for example, it is difficult to align the pair of collars 130 and 132 or the connecting holes when the knitting is performed, and the manufacturing cost increases.

  The present invention has been made against the background of the above circumstances, and the object of the present invention is to keep the thickness of the hollow operation pedal thin, while maintaining the thickness of the rotating connecting portion where the connecting pin is disposed, It is in suppressing buckling.

  In order to achieve such an object, the present invention provides (a) an operation pedal that is disposed on a pedal support fixed to a vehicle so as to be rotatable around a support axis 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; (c) between the operation pedal and the reaction force member or the operation pedal; The reaction force member is interposed between the reaction member and an intermediate member that transmits the operation force, and these are connected so as to be relatively rotatable around a connection pin parallel to the support axis, and via the connection pin (D) The operation pedal has a hollow structure, and the rotation connection portion of the operation pedal has a vehicle width. On the pair of side walls located on both sides in the direction. While a pair of through holes are provided on a straight line substantially parallel to the holding shaft center, (e) the pin is inserted between the pair of side walls and at a position corresponding to the pair of through holes. A hole is provided therethrough, and the connecting pin is inserted through the pin insertion hole, and has a reinforcing member that is integrally fixed to the pair of side walls at the outer peripheral side of the pin insertion hole. It is characterized by.

  According to a second aspect of the present invention, in the vehicle operating pedal device according to the first aspect of the invention, (a) the operating pedal is formed by integrally joining a pair of halves, and the support shaft center of the pair of halves. The flat portions that are substantially perpendicular to each other and parallel to each other are a pair of side walls provided with the through holes, while (b) the reinforcing member is positioned between the pair of side walls. The plate-shaped main body portion and the pair of fitting protrusions that are symmetrically provided so as to protrude from both end surfaces of the main body portion and are respectively fitted in the pair of through holes are integrally formed. The pin insertion hole is provided so as to pass through the fitting protrusions, and (c) the pair of fitting protrusions are respectively fitted into the pair of through holes, whereby the reinforcing member is It is characterized by being positioned with respect to the operation pedal.

  According to a third aspect of the present invention, there is provided the vehicle operation pedal device according to the first or second aspect, wherein the reinforcing member is configured such that a part of an outer peripheral edge thereof is substantially aligned with a side edge of the pair of side walls. It constitutes a part of the shape and is characterized by being integrally welded to the side edge.

  According to a fourth aspect of the present invention, in the vehicle operation pedal device according to any one of the first to third aspects, the reinforcing member is opposite to a direction of a reaction force applied from the connecting pin around a center line of the pin insertion hole. It is characterized by being integrally fixed to the pair of side walls at the side portion.

  According to a fifth aspect of the present invention, in the vehicle operation pedal device according to the third or fourth aspect of the present invention, a portion of the pair of side walls to which the reinforcing member is fixed around a center line of the pin insertion hole of the reinforcing member; The opposite side portion is provided with a mortar-shaped inclined portion that obliquely expands from the reinforcing member as the distance from the pin insertion hole increases.

  According to a sixth aspect of the present invention, in the vehicle operation pedal device according to any one of the first to fifth aspects of the invention, the reinforcing member is integrally formed with a boss provided integrally with the operation pedal concentrically with the support shaft center. It is characterized by being fixed.

  A seventh aspect of the invention is the vehicle operation pedal device according to any one of the first to sixth aspects of the invention. (A) A connection link as the intermediate member is relative to the operation pedal via the rotation connection portion. (B) the connection link is connected to the reaction force member via an intermediate lever arranged to be rotatable around a rotation axis parallel to the support axis. It is characterized by that.

  According to an eighth aspect of the present invention, in the vehicle operation pedal device according to any one of the first to sixth aspects, the reaction force member is directly connected to the operation pedal via the rotation connecting portion. And

  In such a vehicle operation pedal device, the reinforcing member provided with the pin insertion hole is disposed between the pair of side walls, and is integrally fixed to the pair of side walls at the outer peripheral portion of the pin insertion hole. Therefore, the reaction force applied from the connecting pin to the pair of side walls via the reinforcing member is dispersed, the rigidity of the side walls is improved, and the buckling due to the reaction force is maintained while keeping the thickness of the side walls thin. It is suppressed. Further, since it is only necessary to insert the connecting pin into the pin insertion hole provided through the reinforcing member, the workability is improved, and even when the connecting pin rotates relative to the pin insertion hole, the pin Wear of the insertion hole is suppressed.

  The second invention is a case where an operation pedal having a structure in which a pair of halves are integrally joined is provided, and the reinforcing member is a flat portion that is substantially perpendicular to the support axis of the pair of halves and parallel to each other A pair of fitting protrusions that are arranged in a sandwiched manner and symmetrically are fitted and positioned in the through holes, respectively, so that compared to the case where bosses, collars, etc. are arranged Management of high dimensional accuracy such as centering is unnecessary, and the assembly work of the operation pedal including the reinforcing member becomes easy, and the manufacturing cost is reduced. In particular, since the pair of fitting protrusions are provided symmetrically, they can be arranged in any direction of the symmetrical shape, and the assembling work becomes easier and productivity is improved.

  In the third aspect of the invention, a part of the outer peripheral edge of the reinforcing member is substantially matched with the side edges of the pair of side walls to form a part of the outer peripheral shape of the operation pedal, and is integrally welded to the side edges. Since they are joined, the reaction force applied to the pair of side walls is well dispersed, the rigidity of the side walls is improved, and buckling due to the reaction force is suitably suppressed.

  According to the fifth aspect of the invention, the portion of the pair of side walls around the center line of the pin insertion hole of the reinforcing member is separated from the reinforcing member as the distance from the pin insertion hole is increased. Since the mortar-shaped inclined portion that is expanded obliquely is provided, the reaction force applied from the reinforcing member to the pair of side walls via the fixed portion is more efficiently dispersed by the inclined portion and is thus rigid. The buckling due to the reaction force is further effectively suppressed while the thickness of the side wall is kept thin.

  The reinforcing member according to the sixth aspect of the invention is integrally fixed to a boss that is provided integrally with the operation pedal so as to be concentric with the support shaft. Therefore, the boss and the rotation of the operation pedal are maintained while maintaining a thin wall thickness. The rigidity of the dynamic connecting portion is improved integrally.

  The vehicle operation pedal device of the present invention is preferably applied to an operation pedal device for a service brake or a parking brake on which a relatively large reaction force acts, but other vehicle operation pedal devices such as an accelerator pedal and a clutch pedal. It is also possible to apply to. The reaction force member may be one that mechanically applies a reaction force corresponding to the output, such as a push rod of a brake master cylinder, and electrically detects the depression stroke of the operation pedal and controls the brake force and the like. In the electric operation pedal device, a predetermined reaction force may be applied according to the depression stroke by a simulation device having a biasing means such as a spring.

  The reaction force member may be directly connected to the operation pedal via the rotation connecting portion, but may be connected to the operation pedal via an intermediate lever, a connection link or the like, and a plurality of intermediate levers are interposed. It can also be made.

  The operation pedal having a hollow structure may be a piece of steel plate bent into a cylindrical shape, a square pipe, or the like, and both ends of a pair of halves made of steel plate etc. are integrally joined by welding or the like. Various forms are possible, such as a thing, and the entire periphery does not necessarily need to be sealed in a bag shape, and a part thereof may be open. The pair of side walls on which the reinforcing members are disposed may be flat portions that are substantially perpendicular to the support axis and parallel to each other, for example, but are inclined symmetrically from a plane perpendicular to the support axis. It may be an inclined part or the like. In any case, it is desirable to set the shape of the reinforcing member so as to be sandwiched between the pair of side walls.

  The through holes provided in the pair of side walls are the same as or larger than the pin insertion holes of the reinforcing member, and the connecting pins inserted through the pin insertion holes pass through the through holes and are arranged to protrude to both sides. Established. When the fitting protrusion is provided on the reinforcing member as in the second invention, the through hole is sufficiently larger than the pin insertion hole and is equal to or larger than the fitting protrusion. The pin insertion hole and the connecting pin have a perfect circle shape, and the through hole and the fitting protrusion also preferably have a perfect circle shape, but need not necessarily have a perfect circle shape. If the reinforcing member itself is a perfect circular disk shape, it has no anisotropy and can be easily assembled, but can be set as appropriate according to the shape of the operation pedal. In carrying out the first aspect of the invention, a reinforcing member that does not have a fitting protrusion can be employed.

  The reinforcement member may be fixed to the side wall by welding or the like only at a part around the center line of the pin insertion hole, but at a plurality of locations substantially equally (equal angular intervals) around the center line of the pin insertion hole. May be fixed by resistance welding or the like. As the fixing means of the reinforcing member, welding joining such as arc welding or resistance welding is suitable, but various fixing means such as an adhesive means such as brazing can be used.

  In the third invention, it is desirable that a part of the outer peripheral edge of the reinforcing member protrudes outward from the side edge of the side wall, and the side edge and the end surface of the reinforcing member are joined by fillet welding. The side edge of the side wall protrudes from the outer peripheral edge of the reinforcing member to the outside so that a part of the outer peripheral edge of the reinforcing member and the side wall are fillet welded, or the outer peripheral edge of the reinforcing member and the side edge of the side wall May be welded together at the boundary between the two.

  In the fifth aspect of the invention, a mortar-shaped inclined portion is provided around the center line of the pin insertion hole on the side opposite to the fixed portion of the reinforcing member. Is not necessarily required. The inclined portion may have various shapes such as a partial taper shape or a spherical shape, or a plurality of flat surfaces joined together.

  In the sixth aspect of the invention, the reinforcing member extends from the rotation connecting portion to the support shaft center side and is integrally fixed to the boss. There is no need to fix it.

  The connecting pin of the rotating connecting portion is disposed so as to be relatively rotatable with respect to, for example, both the reinforcing member and the reaction force member (or the intermediate member). It is also possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of a brake pedal device 10 for a service brake according to an embodiment of the present invention. The axis of a first support shaft 12 that is substantially horizontal to a pedal support (not shown) that is integrally fixed to a vehicle. An operation pedal 14 is disposed so as to be rotatable around O, and an intermediate lever 18 is disposed so as to be rotatable around the axis of the second support shaft 16 substantially parallel to the axis O. A connecting link 20 is disposed across the operation pedal 14 and the intermediate lever 18. The axis O of the first support shaft 12 corresponds to the support axis, and the connection link 20 corresponds to an intermediate member to which the operation force of the operation pedal 14 is transmitted via the rotation connection portion 22.

  The operation pedal 14 is rotated clockwise by the first support shaft 12 in FIG. 1 when a pedal seat 24 provided at the lower end is depressed by the driver, and is connected to the upper end portion of the operation pedal 14. The intermediate lever 18 is mechanically rotated counterclockwise about the second support shaft 16 via the connecting link 20. A push rod 28 of a brake master cylinder is connected to an upper end portion of the intermediate lever 18 via a clevis 30 so as to be relatively rotatable around an axis of a connecting pin 26 substantially parallel to the second support shaft 16. As the lever 18 rotates, the push rod 28 is mechanically pressed in the left direction in the figure, so that brake hydraulic pressure is generated according to the depressing operation force of the operation pedal 14, and the reaction force is generated by the push rod 28. To act on. The push rod 28 is biased so as to protrude from the brake master cylinder, and when the stepping operation of the pedal seat 24 is released, the intermediate lever 18 returns to the right of the second support shaft 16 by the biasing force and rotates. At the same time, the operation pedal 14 is returned and rotated counterclockwise about the axis O of the first support shaft 16 and is held in the original position shown in FIG. The push rod 28 corresponds to a reaction force member.

  2 is an enlarged cross-sectional view taken along the line II-II in FIG. 1. FIG. 3 (a) is an enlarged perspective view of the rotary connecting portion 22 on the operation pedal 14 side, and FIG. ) Is a cross-sectional view showing an enlarged IIIB-IIIB cross section in (a). As is apparent from these drawings, the operation pedal 14 has a plane substantially perpendicular to the axis O of the first support shaft 12, that is, a plane substantially parallel to the front-rear direction of the vehicle and substantially vertical, and is almost halved. It consists of a pair of divided halves 32, 34, and a plurality of side edges 32e, 34e of the halves 32, 34, that is, the edges located in the longitudinal direction or the vertical direction of the vehicle are integrated. It is welded and has a hollow structure. A portion supported by the first support shaft 12 is provided with a through hole, and a cylindrical boss 36 is formed across both halves 32 and 34. It is fixed integrally by welding or the like. A pair of the connecting links 20 are disposed so as to be positioned on both sides of the operation pedal 14 and the intermediate lever 18, and a first connecting pin 38 that is substantially parallel to the axis O of the first support shaft 12 is provided. And is connected to the intermediate lever 18 via a second connecting pin 40 substantially parallel to the first connecting pin 38. These connecting pins 38 and 40 are disposed through the operation pedal 14 and the intermediate lever 18, respectively, and a pair of connecting links 20 are connected to end portions protruding on both sides thereof, and a snap ring or the like. It is secured by. The first connection pin 38 on the operation pedal 14 side corresponds to a connection pin of the rotation connection portion 22, can be rotated relative to both the operation pedal 14 and the connection link 20, and is relatively rotated with less friction. .

  Of the pair of halves 32 and 34 constituting the operation pedal 14, portions connected to the connection link 20 via the rotation connection portion 22 are substantially perpendicular to the axis O and parallel to each other. The parallel flat portions 32a and 34a are provided at a predetermined interval, and the parallel flat portions 32a and 34a are provided with a pair of through holes 32b and 34b on a straight line substantially parallel to the axis O. Yes. These parallel flat portions 32a and 34a correspond to a pair of side walls located on both sides in the vehicle width direction, and a reinforcing member 44 is disposed between the parallel flat portions 32a and 34a.

  The reinforcing member 44 protrudes substantially perpendicularly from the flat plate-shaped main body portion 46 positioned in a state where the reinforcing member 44 is sandwiched between the inner side surfaces of the pair of parallel flat portions 32a and 34a, and the both end surfaces of the main body portion 46. Are integrally provided with a pair of fitting projections 48 and 50 that are respectively fitted into the pair of through holes 32b and 34b, and penetrate the pair of fitting projections 48 and 50. Thus, a pin insertion hole 52 is provided substantially parallel to the axis O, and the first connection pin 38 is inserted through the pin insertion hole 52 so as to be connected to the pair of connection links 20. It has become. The main body portion 46 of the reinforcing member 44 has a substantially circular disk shape, the fitting protrusions 48 and 50 are provided at the center portion of the main body portion 46, and the pin insertion hole 52 is the main body portion 46. Is provided on the center line. The pin insertion hole 52 and the first connecting pin 38 that are fitted to each other have a substantially perfect circular hole or columnar shape with substantially the same diameter. Further, the through holes 32b and 34b and the fitting protrusions 48 and 50 that are fitted to each other also have substantially circular holes and columnar shapes having substantially the same diameter, and the fitting protrusions 48 and 50. Is fitted into the through holes 32b and 34b, whereby the arrangement position of the reinforcing member 44 with respect to the operation pedal 14 is defined and positioned.

  The rotation connecting portion 22 on the operation pedal 14 side is set to the lower end portion of the intermediate lever 18, that is, the end portion on the side close to the portion connected via the connecting link 20, while the main body portion of the reinforcing member 44. A part of the outer peripheral edge of 46 is made to substantially coincide with the side edge 32e, 34e of the operation pedal 14, and constitutes a part of the outer peripheral shape (closed cross section) of the operation pedal 14. In this embodiment, a part of the outer peripheral edge of the main body 46 of the reinforcing member 44 slightly protrudes outward from the side edges 32e and 34e of the parallel flat portions 32a and 34a of the operation pedal 14 (FIG. 3 ( b)), the fillet over the predetermined length range L (see FIG. 4) where the corners of the side edges 32e, 34e and the end face of the main body 46 are larger than the diameter d of the first connecting pin 38. The reinforcing member 44 is integrally fixed to the operation pedal 14 by welding and welding. The reinforcement member 44 is continuously welded by the same welding method in a series of welding steps when the side edges 32e and 34e of the pair of halves 32 and 34 are integrally welded by arc welding such as TIG welding. Can be done. W in the figure represents the welded joint between the side edges 32e, 34e and the main body 46, and as shown in FIGS. 4 (a) and 5, the pin is inserted around the center line of the main body 46. Around the center line of the hole 52, welding is performed at a portion opposite to the direction of the reaction force F1 applied from the first connecting pin 38.

  As described above, the reinforcing member 44 is disposed in the rotation connecting portion 22 and is integrally welded to the operation pedal 14 over a predetermined length range L larger than the diameter d of the first connecting pin 38. Thus, when the reaction force F1 transmitted from the first connecting pin 38 to the reinforcing member 44 is transmitted to the operation pedal 14 via the weld joint W, as shown by an arrow F2 in FIG. Since the surface pressure acting on the parallel flat portions 32a and 34a is reduced and the rigidity of the parallel flat portions 32a and 34a is increased, the plate thickness of the parallel flat portions 32a and 34a is kept thin. Buckling due to reaction force is suppressed. In FIG. 4B, the first connecting pin 38 is directly inserted into the connecting hole 58 provided in the pair of parallel flat portions 32a and 34a, and the reaction force F1 is directly applied to the parallel flat portions 32a and 34a. In the case of the conventional example, if the length range L of the welded joint W of the present embodiment shown in (a) is, for example, twice the diameter dimension d of the first connecting pin 38, these parallel flat portions 32a. If the plate thickness of 34a is the same, the surface pressure is ½ that of the conventional example.

  Further, of the pair of halves 32 and 34 shown in FIG. 3 (b), around the center line of the pin insertion hole 52 of the reinforcing member 44, the portion on the opposite side to the portion to which the reinforcing member 44 is welded, In other words, in the portion in the same direction as the direction of the reaction force F1 applied from the first connecting pin 38 in FIG. 4, it is substantially on the left side of the parallel flat portions 32a and 34a in which the reinforcing member 44 is disposed in FIG. The mortar-shaped inclined portions 32c and 34c are formed at the positions where the mortar-shaped inclined portions 32c and 34c are formed so as to be obliquely expanded from the reinforcing member 44 as they are separated from the pin insertion holes 52, that is, so that the pair of halves 32 and 34 are separated from each other. Are provided approximately symmetrically. As is apparent from FIG. 3B, the inclined portions 32c and 34c are provided to be continuous with the parallel flat portions 32a and 34a, and are formed so as to form a part of a taper shape. As is clear from FIG. 5, the whole has a mortar shape by having a smooth curve line that is convex in the front of the vehicle in a plane that is substantially parallel to the vehicle longitudinal direction and substantially vertical. Yes. As a result, the reaction force F2 transmitted from the reinforcing member 44 to the parallel flat portions 32a and 34a via the welded joint W is more efficiently as shown by the arrow F3 in FIG. 5 due to the presence of the inclined portions 32c and 34c. The surface pressure acting on the pair of halves 32 and 34 is further reduced.

  Thus, in the brake pedal device 10 of the present embodiment, the reinforcing member 44 provided with the pin insertion hole 52 is disposed between the parallel flat portions 32a and 34a of the pair of halves 32 and 34, and Since the outer peripheral portion of the pin insertion hole 52 is integrally welded over a length range L larger than the diameter d of the first connection pin 38, the first connection pin 38 and the reinforcing member 44 are used. The reaction force F2 applied to the pair of parallel flat portions 32a and 34a is dispersed and the rigidity is improved, and buckling due to the reaction force F2 is suppressed while the plate thickness of the halves 32 and 34 is kept thin. Specifically, a part of the outer peripheral edge of the main body 46 of the reinforcing member 44 is made to substantially coincide with the side edges 32e and 34e of the pair of parallel flat portions 32a and 34a so that a part of the outer peripheral shape of the operation pedal 14 is obtained. Since the structure is integrally welded to the side edges 32e and 34e, the reaction force F2 applied to the pair of parallel flat portions 32a and 34a is well dispersed, and the parallel flat portion 32a. 34a is improved, and buckling due to the reaction force F2 is suitably suppressed.

  Moreover, since the 1st connection pin 38 should just be inserted in the pin insertion hole 52 provided by penetrating the reinforcing member 44, the workability is improved and the reaction force is exerted on the entire inner peripheral surface of the pin insertion hole 52. Since F1 is received, as shown in FIG. 4 (b), wear is suppressed as compared with a case where the reaction force F1 is directly received by the connecting hole 58 provided in the plate-like parallel flat portions 32a and 34a.

  Further, in this embodiment, the operation pedal 14 having a structure in which the pair of halves 32 and 34 are integrally joined is provided, and the reinforcing member 44 is the first support shaft of the pair of halves 32 and 34. A pair of fitting protrusions 48, 50 that are arranged in a state of being sandwiched between parallel flat portions 32a, 34a that are substantially perpendicular to the 12 axis O and parallel to each other, and that are symmetrically provided, are respectively provided. Since it is fitted and positioned in the through-holes 32b and 34b, it is not necessary to manage with high dimensional accuracy such as centering of the pair of through-holes as compared with the cases (a) to (c) of FIG. The assembly work of the operation pedal 14 including the member 44 is facilitated, and the manufacturing cost is reduced.

  The main body 46 of the reinforcing member 44 has a substantially circular disk shape, and the pair of fitting protrusions 48 and 50 are provided so as to protrude symmetrically to the central portion of the main body 46. Therefore, it can be arranged in any orientation of its symmetrical shape, and can be assembled without considering the phase around the center line of the main body 46, making assembly work easier and producing. Improves.

  Of the pair of halves 32 and 34, around the center line of the pin insertion hole 52 of the reinforcing member 44, the portion opposite to the portion where the reinforcing member 44 is welded, in other words, from the first connecting pin 38. In the portion in the same direction as the direction of the reaction force F <b> 1 to be applied, inclined portions 32 c and 34 c that expand obliquely as they are separated from the pin insertion hole 52 are provided in a mortar shape (fan shape). The reaction force F2 applied to the pair of parallel flat portions 32a and 34a via the welded joint portion W is more efficiently distributed by the inclined portions 32c and 34c, and the rigidity is improved. The buckling due to the reaction force is more effectively suppressed while the plate thickness of 34 is maintained thin.

  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.

  In the embodiment of FIG. 6, instead of the reinforcing member 44, a reinforcing member 60 in which an arm portion 62 that reaches the boss 36 continuously with the main body portion 46 is provided is used, and the boss is interposed via the arm portion 62. In the case of being integrally welded to 36, the rigidity of the boss 36 of the operation pedal 14 and the rotation connecting portion 22 is integrally improved while the plate thickness of the pair of halves 32, 34 is kept thin.

  In the embodiment of FIG. 7, compared with the reinforcing member 44, the pin insertion holes 52 are respectively formed on both end faces of the disk-shaped main body 46 and on the outer peripheral side of the fitting protrusions 48 and 50. A reinforcing member 70 provided with a plurality of projections 72 (eight sides in the embodiment) at substantially equal intervals around the center line is used, and the pair of halves 32 and 34 are connected via the projections 72. In the case where projection welding is performed on the parallel flat portions 32a and 34a, substantially the same operational effects as in the first embodiment can be obtained. The “x” marks shown in the parallel flat portions 32a and 34a represent the portions to be projection welded.

  In the brake pedal device 80 of FIG. 8, the push rod 28 is directly connected to the operation pedal 14 via the connecting pin 84, and the reinforcing member 44 is disposed at the rotational connecting portion 82. As is apparent from FIG. 9 showing an enlarged IX-IX cross section in FIG. 8, the rotary connecting portion 82 is configured in substantially the same manner as the rotary connecting portion 22, and is the same as in the first embodiment. The effect is obtained.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one embodiment to the last, and 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.

1 is a front view showing a brake pedal device for a service brake of a vehicle to which the present invention is applied. It is an enlarged view of the II-II cross section in FIG. FIG. 3A is a perspective view of an operation pedal side rotation connecting portion in the brake pedal device of FIG. 1, and FIG. 3B is an enlarged view of a cross section taken along line IIIB-IIIB in FIG. FIGS. 2A and 2B are diagrams for explaining a reaction force applied to an operation pedal. FIG. 1A shows the case of FIG. 1 having a reinforcing member, and FIG. . FIG. 5 is a diagram for explaining that the reaction force applied from the reinforcing member to the operation pedal in FIG. 4A is further dispersed by a mortar-shaped inclined portion provided on the operation pedal. It is a figure which shows the Example by which the reinforcement member is connected with the boss | hub, and is sectional drawing corresponding to FIG. It is a figure explaining the Example by which a reinforcement member is projection welded to an operation pedal, and is a perspective view before welding joining. It is a figure which shows another Example of this invention, and is a front view corresponding to FIG. It is an enlarged view of the IX-IX cross section in FIG. It is a figure explaining some aspects of a rotation connection part in case a reaction force member is directly connected with an operation pedal, and is sectional drawing corresponding to FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 80: Brake pedal apparatus (vehicle operation pedal apparatus) 12: 1st support shaft 14: Operation pedal 18: Intermediate lever 20: Connection link (intermediate member) 22, 82: Rotation connection part 28: Push rod (reverse) Force members) 32, 34: halves 32a, 34a: parallel flat portions (side walls) 32b, 34b: through holes 32c, 34c: inclined portions 38: first connecting pins (connecting pins) 44, 60, 70: reinforcing members 46: main body 48, 50: fitting projection 52: pin insertion hole 84: connecting pin O: shaft center (support shaft center) W: weld joint

Claims (8)

An operation pedal disposed on a pedal support fixed to the vehicle so as to be rotatable around a support axis, and operated 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;
It is interposed between the operation pedal and the reaction force member, or between the operation pedal and an intermediate member that transmits the operation force to the reaction force member, and these are connected in parallel with the support axis. A rotationally connecting portion that is connected to the pin so as to be relatively rotatable, and that transmits the operating force via the connecting pin;
In a vehicle operation pedal device having
The operation pedal has a hollow structure, and a pair of side walls located on both sides in the vehicle width direction are paired on a straight line substantially parallel to the support axis on the rotation connecting portion of the operation pedal. While the through hole is provided,
The pin insertion hole is provided between the pair of side walls, the pin insertion hole is provided at a position corresponding to the pair of through holes, and the connection pin is inserted through the pin insertion hole. An operation pedal device for a vehicle, comprising a reinforcing member that is integrally fixed to the pair of side walls at a portion on the outer peripheral side of the pin insertion hole. The operation pedal is formed by integrally joining a pair of halves, and flat portions of the pair of halves that are substantially perpendicular to the support axis and parallel to each other are provided with the through holes. While being a pair of side walls,
The reinforcing members are symmetrically provided so as to protrude from both end surfaces of the flat plate-shaped main body portion positioned between the pair of side walls and the pair of through holes, respectively. It has a pair of fitting projections to be fitted together, and the pin insertion hole is provided so as to penetrate the pair of fitting projections,
The vehicular operation pedal according to claim 1, wherein the reinforcing member is positioned with respect to the operation pedal by fitting the pair of fitting protrusions into the pair of through holes, respectively. apparatus. The reinforcing member includes a part of the outer peripheral shape of the operation pedal in which a part of the outer peripheral edge is substantially aligned with the side edges of the pair of side walls, and is integrally welded to the side edges. The vehicular operation pedal device according to claim 1, wherein the vehicular operation pedal device is provided. The reinforcing member is integrally fixed to the pair of side walls at a portion opposite to a direction of a reaction force applied from the connecting pin around a center line of the pin insertion hole. Item 4. The vehicle operating pedal device according to any one of Items 1 to 3. Of the pair of side walls, around the center line of the pin insertion hole of the reinforcement member, the portion opposite to the portion where the reinforcement member is fixed is inclined from the reinforcement member as the distance from the pin insertion hole increases. 5. A vehicular operation pedal device according to claim 3 or 4, wherein a mortar-shaped inclined portion is provided. The said reinforcement member is integrally fixed to the boss | hub provided integrally with the said operation pedal concentrically with the said support shaft center. The any one of Claims 1-5 characterized by the above-mentioned. Operation pedal device for a vehicle. A connection link is connected to the operation pedal as the intermediate member via the rotation connection portion so as to be relatively rotatable,
The connection link is connected to the reaction force member via an intermediate lever arranged to be rotatable around a rotation axis parallel to the support axis. The vehicle operation pedal device according to any one of the above. The vehicular operation pedal device according to any one of claims 1 to 6, wherein the reaction member is directly connected to the operation pedal via the rotation connecting portion.

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