JP2018095129A - Leaf spring support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the breakage of a flange support part caused by a load from a flange of a stopper bracket.SOLUTION: A leaf spring support structure 10 comprises a support bracket 12 fixed to an axle case 11, and a stopper bracket 13. A front flange support part 20 of the support bracket 12 is arranged ahead of a case front face 25, a rear flange support part 22 is arranged behind a case rear face 28, and an upper plate part 23 is arranged in an upper part of a case upper face 29, face-contacts with the case upper face 29, and is connected to the front flange support part 20 and the rear flange support part 22. A front flange 38 of the stopper bracket 13 is fastened and fixed to the front flange support part 20, and a rear flange 39 is fastened and fixed to the rear flange support part 22. A connecting plate part 40 of the stopper bracket 13 connects the front flange 38 and the rear flange 39 to each other, and supports a leaf spring 8 from below.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a leaf spring support structure that supports an end portion of a leaf spring from an axle case side of a vehicle.

  Patent Document 1 describes an integrally cast product that is fastened and fixed to a rear axle housing of a trunnion suspension rear biaxial vehicle. The rear axle housing has a large central diameter portion in which a differential gear and the like are accommodated, and an arm portion that extends from the large central diameter portion to the left and right in the vehicle width direction. In the integrally cast product, a slide seat with which the lower surface of the end portion of the leaf spring abuts and a side thrust bracket that extends upward and restricts sliding of the end portion of the leaf spring in the vehicle width direction are integrally cast. The vehicle longitudinal flange of the integrally cast product faces the vehicle longitudinal shelf of the arm portion of the rear axle housing and is tightened by a bolt. The publication also shows a state in which the rack portion of the rear axle housing protrudes forward or backward continuously from the front or rear surface of the rear axle housing.

JP 2003-191707 A

  In the vehicle described in Patent Document 1, when the vehicle vibrates, the load from the leaf spring is input to the rack portion of the rear axle housing from the flange of the integrally cast product (stopper bracket). The shelf of the rear axle housing continuously protrudes forward or rearward from the front or rear surface of the rear axle housing, and supports the flange of the stopper bracket from below. There is a possibility that the load concentrates on the base end portion of the shelf portion, and the shelf portion (flange support portion) of the rear axle housing is damaged.

  Then, an object of this invention is to provide the leaf spring support structure which can prevent the failure | damage of the flange support part by the load from the flange of a stopper bracket.

  In order to solve the above-mentioned problems, the present invention is a leaf spring support structure that supports an end portion of a leaf spring from an axle case side extending in the vehicle width direction of the vehicle, and includes a support bracket and a stopper bracket. The support bracket is disposed in front of the front case of the axle case and intersects with the upper and lower directions, a rear flange support portion disposed behind the rear surface of the axle case and intersects with the upper and lower directions, and the axle case The upper plate portion is disposed above the upper surface of the case and is connected to the front flange support portion and the rear flange support portion, and is fixed to the axle case with the lower surface of the upper plate portion in contact with the upper surface of the case. Is done. The stopper bracket is a front flange that is fastened and fixed in contact with the front flange support portion of the support bracket from above, and a rear flange that is fastened and fixed in contact with the rear flange support portion of the support bracket from above. A leaf spring end portion with respect to the axle case is disposed above the upper plate portion of the support bracket and has a spring support portion that connects the front flange and the rear flange and supports the end portion of the leaf spring from below. Restrict movement in the width direction.

  In the above configuration, the support bracket has an upper plate portion connected to the front flange support portion and the rear flange support portion, and is fixed to the axle case with the lower surface of the upper plate portion in contact with the upper surface of the case. . For this reason, the load of the up-down direction input into the flange support part before and behind a support bracket from the flange before and behind a stopper bracket at the time of the vibration of a vehicle, etc. can be disperse | distributed from the upper board part of a support bracket to the axle case side. Therefore, the concentration of load from the front and rear flanges of the stopper bracket to the front and rear flange support portions of the support bracket can be suppressed, and damage to the front and rear flange support portions of the support bracket can be prevented.

  In addition, the front and rear flanges of the stopper bracket are fastened and fixed to the front and rear flange support portions of the support bracket, respectively. By loosening the bolts and nuts that fasten the flange and the flange support portion, the stopper bracket is fixed to the support bracket. Can be removed from. For this reason, for example, when the brake is attached to the outer end portion of the axle case in the vehicle width direction, the brake can be attached with the stopper bracket removed from the axle case side, and the brake is installed above the axle case. It is possible to secure a work space for the mounting work.

  The upper surface of the front flange support portion and the upper surface of the rear flange support portion of the support bracket may be disposed below the case upper surface of the axle case.

  In the above configuration, since the upper surface of the flange support part before and after the support bracket is disposed below the case upper surface of the axle case, the stopper bracket flange is disposed at a lower position and the bolts and nuts upward. The protrusion of can be suppressed. For this reason, when the vehicle vibrates, the interference between the bolt / nut and the leaf spring can be prevented.

  The support bracket may be fixed to the axle case in a state where the rear end side of the front flange support portion is in contact with the front surface of the case and the front end side of the rear flange support portion is in contact with the rear surface of the case.

  In the above configuration, the support bracket is fixed to the axle case in a state where the rear end side of the front flange support portion is in contact with the front surface of the case and the front end side of the rear flange support portion is in contact with the rear surface of the case. Further, the support rigidity in the front-rear direction of the support bracket with respect to the load in the front-rear direction input from the front and rear flanges of the stopper bracket to the front and rear flange support portions of the support bracket can be increased.

  According to the present invention, it is possible to prevent the flange support portion from being damaged by a load from the flange of the stopper bracket.

1 is a schematic side view of a vehicle to which a leaf spring support structure according to an embodiment of the present invention is applied. It is a perspective view of the principal part of the leaf spring support structure of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a perspective view of the state which attached the support bracket to the axle case. It is a perspective view of the state which attached the support bracket and the stopper bracket to the axle case.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIG. 1, the leaf spring support structure 10 according to the present embodiment includes, for example, a rear portion of a vehicle 1 with front and rear rear wheels 2 shafts (rear front shaft (not shown), rear rear) via a trunnion suspension device 6. The present invention is applied to a vehicle 1 such as a truck or a trailer supported on the shaft 4) from below. The vehicle 1 has left and right side members 5 (only the left side member 5 is shown in FIG. 1) extending in the front-rear direction on both sides in the vehicle width direction of the vehicle 1.

  The front and rear rear axles 2 each have an axle main body 9 extending in the vehicle width direction and an axle case 11 covering substantially the entire area of the axle main body 9. Are spaced apart from each other and extend in the vehicle width direction. The outer end portions on both sides in the vehicle width direction of the front and rear rear axles 2 are arranged on the outer side in the vehicle width direction with respect to the left and right side members 5, and hubs are provided on the outer end portions on both sides in the vehicle width direction of each axle. While the brake is fixed, wheels (tires) are attached (not shown). The front and rear axle biaxial axle case 11 includes a central portion 11a covering the differential gear at the vehicle width direction central portion, and left and right extending portions 11b extending from the central portion 11a to both sides in the vehicle width direction (the left side in FIG. 1). Only the extending portion 11b is shown). The left and right extending portions 11b of the axle case 11 are formed in a substantially rectangular cross-sectional shape that intersects the vehicle width direction.

  The trunnion suspension device 6 has a pair of left and right trunnion brackets 2 and left and right leaf springs 8. The trunnion suspension device 6 is provided symmetrically on the left and right sides of the vehicle 1 and has substantially the same configuration. Therefore, the left side will be described below, and the description on the right side will be omitted.

  The trunnion bracket 2 is disposed at a substantially central portion in the front-rear direction between the rear front shaft and the rear rear shaft 4, and the upper end portion 2 a is fastened and fixed to the side member 5 and extends downward from the side member 5. The trunnion bracket 2 is provided with a trunnion shaft coupling portion 16. A trunnion shaft 7 extending in the vehicle width direction is fixed to the trunnion shaft connecting portion 16. The trunnion shaft 7 extends outward from the trunnion shaft coupling portion 16 in the vehicle width direction.

  The leaf spring 8 has a configuration in which a plurality of long plates (plate springs) having different lengths are stacked one above the other, and is disposed outside the side member 5 in the vehicle width direction and extends in the front-rear direction. A central portion 8a in the front-rear direction of the leaf spring 8 is formed so as to bend upward, and is disposed above the trunnion shaft 7 and connected to the trunnion shaft 7 via a bracket 17 and a U bolt 18 or the like. Is rotatably supported from below. The front end portion (not shown) and the rear end portion 8b of the leaf spring 8 are connected to the front axle (not shown) and the rear axle 4, respectively.

  As shown in FIGS. 2 and 3, the leaf spring support structure 10 that supports the front end portion and the rear end portion 8 b of the leaf spring 8 (see FIG. 1) from the axle case 11 side of the front axle and the rear axle 4 is a front axle. And a support bracket 12 fixed to an extension portion 11b (hereinafter, simply referred to as axle case 11) of the axle case 11 of the rear axle 4, a stopper bracket 13, and a pad 14. The front end portion and the rear end portion 8b of the leaf spring 8 are connected to the front axle and the rear axle 4 via the support bracket 12, the stopper bracket 13 and the pad 14, and are supported by the front axle and the rear axle 4. The Since the support bracket 12, the stopper bracket 13 and the pad 14 fixed to the axle case 11 of the front axle and the rear axle 4 have substantially the same configuration, the support bracket 12 and the stopper on the rear axle 4 side will be described below. The bracket 13 and the pad 14 will be described, and other description will be omitted.

  As shown in FIGS. 2 to 4, the support bracket 12 includes a front plate portion 19, a front flange support portion 20, a rear plate portion 21, a rear flange support portion 22, an upper plate portion 23, and a plurality (in this embodiment, Six) ribs 24a to 24f are integrally formed. The support bracket 12 is disposed on the outer side in the vehicle width direction of the side member 5 (see FIG. 1), and is fixed to the axle case 11 by welding. The support bracket 12 and the leaf spring 8 are disposed at substantially the same position in the vehicle width direction. In the following description, the front-rear direction, the vehicle width direction, and the vertical direction of the support bracket 12 indicate directions in a state where the support bracket 12 is fixed to the axle case 11.

  The front plate portion 19 is formed in a plate shape that intersects with the front-rear direction, and the planar rear surface 26 of the front plate portion 19 is in surface contact with the planar front surface 25 of the axle case 11 (hereinafter referred to as the case front surface 25). . The upper end portion of the front plate portion 19 is disposed below the planar upper surface 29 of the axle case 11 (hereinafter referred to as the case upper surface 29).

  The front flange support portion 20 is formed in a plate shape that intersects with the vertical direction, is disposed in front of the case front surface 25, and continuously extends forward from the upper end portion of the front plate portion 19. That is, the rear end side of the front flange support portion 20 contacts the case front surface 25 of the axle case 11. The front flange support portion 20 is formed with two bolt insertion holes 30 penetrating in the vertical direction. The two bolt insertion holes 30 are arranged at positions separated from each other in the vehicle width direction. The planar upper surface 31 of the front flange support portion 20 is disposed below the case upper surface 29 of the axle case 11.

  The rear plate portion 21 is formed in a plate shape that intersects with the front-rear direction, is provided at the rear portion of the support bracket 12 symmetrically with the front plate portion 19, and the planar front surface 27 of the rear plate portion 21 is the plane of the axle case 11. Surface contact with the rear surface 28 (hereinafter referred to as the case rear surface 28). The upper end portion of the rear plate portion 21 is disposed below the case upper surface 29 of the axle case 11.

  The rear flange support portion 22 is formed in a plate shape that intersects with the vertical direction and is arranged behind the case rear surface 28. The rear flange support portion 22 is provided at the rear portion of the support bracket 12 symmetrically with the front flange support portion 20. It extends backward from the upper end continuously. That is, the front end side of the rear flange support portion 22 contacts the case rear surface 28 of the axle case 11. The rear flange support portion 22 is formed with two bolt insertion holes 32 penetrating in the vertical direction. The two bolt insertion holes 32 are arranged at positions separated from each other in the vehicle width direction. The planar upper surface 33 of the rear flange support portion 22 is disposed below the case upper surface 29 of the axle case 11.

  The upper plate portion 23 is formed in a plate shape that intersects with the vertical direction, and is disposed above the case upper surface 29 of the axle case 11. The planar lower surface 34 of the upper plate portion 23 comes into surface contact (contact) with the case upper surface 29 of the axle case 11. An opening 35 penetrating in the vertical direction is formed in a substantially central portion of the upper plate portion 23, and a case upper surface 29 of the axle case 11 is exposed inside the opening 35. The front and rear end portions 23a and 23b of the upper plate portion 23 are connected to the front flange support portion 20 and the rear flange support portion 22 by four ribs 24c to 24f described later. Note that the opening 35 may not be provided in the upper plate portion 23.

  The rib 24a is formed in a plate shape that intersects the vehicle width direction. The rear end of the rib 24a continues to the front surface of the substantially central portion of the front plate portion 19 in the vehicle width direction. The upper end of the rib 24 a is continuous with the lower surface of the substantially center portion (between the two bolt insertion holes 30) in the vehicle width direction of the front flange support portion 20. The rib 24a supports the front flange support portion 20 from the lower front plate portion 19 side.

  The rib 24b is formed in a plate shape that intersects the vehicle width direction, and is provided on the rear side of the support bracket 12 symmetrically with the rib 24a. The front end of the rib 24b is continuous with the rear surface of the substantially central portion of the rear plate portion 21 in the vehicle width direction. The upper end of the rib 24b is continuous with the lower surface of the substantially center portion (between the two bolt insertion holes 32) of the rear flange support portion 22 in the vehicle width direction. The rib 24b supports the rear flange support portion 22 from the lower rear plate portion 21 side.

  The ribs 24c and the ribs 24d are formed in a plate shape that intersects the vehicle width direction, extend from the vehicle width direction both ends of the front end portion 23a of the upper plate portion 23 to the front lower side, and both ends of the front flange support portion 20 in the vehicle width direction. It continues to the upper surface 31 of the part. That is, the rib 24 c and the rib 24 d connect the front end portion 23 a of the upper plate portion 23 and the front flange support portion 20. An opening 36 is formed between the front end portion 23 a of the upper plate portion 23, the front flange support portion 20, the rib 24 c and the rib 24 d, and the surface of the axle case 11 is exposed inside the opening 36.

  The rib 24e and the rib 24f are formed in a plate shape intersecting with the vehicle width direction, are provided on the rear side of the support bracket 12 symmetrically with the rib 24c and the rib 24d, and the vehicle width of the rear end portion 23b of the upper plate portion 23. It extends rearward and downward from both ends in the direction and continues to the upper surfaces 33 at both ends in the vehicle width direction of the rear flange support portion 22. That is, the rib 24 e and the rib 24 f connect the rear end portion 23 b of the upper plate portion 23 and the rear flange support portion 22. An opening 37 is formed between the rear end portion 23 b of the upper plate portion 23, the rear flange support portion 22, the rib 24 e and the rib 24 f, and the surface of the axle case 11 is exposed inside the opening 37. .

  As shown in FIGS. 3 and 5, the stopper bracket 13 includes a front flange 38, a rear flange 39, a connecting plate portion (spring support portion) 40, left and right upright plate portions 41 a and 41 b, and a pin 42. The bolts 43 and nuts 44 are fastened and fixed to the support bracket 12 together with the pads 14 described later. In the following description, the front-rear direction, the vehicle width direction, and the vertical direction of the stopper bracket 13 are the directions in which the stopper bracket 13 is fixed to the axle case 11 by being fixed to the support bracket 12. Show.

  The front flange 38 is formed in a plate shape intersecting with the vertical direction, and the planar lower surface 45 of the front flange 38 is in surface contact with the upper surface 31 of the front flange support portion 20 of the support bracket 12. The front flange 38 is formed with two bolt insertion holes 46 (only one bolt insertion hole 46 is shown in FIG. 5) penetrating in the vertical direction. The two bolt insertion holes 46 communicate with the two bolt insertion holes 30 (see FIG. 4) of the front flange support portion 20. On both sides of the front flange 38 in the vehicle width direction, the rib 24c and the rib 24d of the support bracket 12 stand at a position adjacent to the front flange 38.

  The rear flange 39 is formed in a plate shape that intersects with the vertical direction, is provided at the rear portion of the stopper bracket 13 symmetrically with the front flange 38, and the planar lower surface 47 of the rear flange 39 is the rear flange support portion of the support bracket 12. The upper surface 33 of 22 is in surface contact. In the rear flange 39, two bolt insertion holes 48 penetrating in the vertical direction are formed. The two bolt insertion holes 48 communicate with the two bolt insertion holes 32 (see FIG. 4) of the rear flange support portion 22. On both sides of the rear flange 39 in the vehicle width direction, ribs 24e and ribs 24f of the support bracket 12 stand at positions adjacent to the rear flange 39.

  The connecting plate portion 40 is formed in a plate shape that intersects with the vertical direction, and is disposed above the upper plate portion 23 of the support bracket 12, and between the rear end edge of the front flange 38 and the front end edge of the rear flange 39. It extends in the front-rear direction and connects the rear end edge of the front flange 38 and the front end edge of the rear flange 39. The connecting plate portion 40 is disposed above the front flange 38 and the rear flange 39, and the lower surface 52 of the connecting plate portion 40 is slightly spaced upward from the upper surface 51 of the upper plate portion 23 of the support bracket 12. It faces the upper surface 51 of the part 23.

  The left and right upright plate portions 41 a and 41 b stand upward from both ends of the connecting plate portion 40 in the vehicle width direction. Both end portions of columnar pins 42 extending in the vehicle width direction are fixed to upper end portions of the left and right upright plate portions 41a and 41b. An insertion space 53 into which the rear end portion 8b (see FIG. 1) of the leaf spring 8 is inserted is defined between the left and right upright plate portions 41a and 41b, the pin 42, and the connecting plate portion 40. In a state where the rear end 8b of the leaf spring 8 is inserted into the insertion space 53, the connecting plate portion 40 supports the rear end 8b of the leaf spring 8 from below via a pad 14 described later, and the stopper bracket 13 is The movement of the rear end portion 8b of the leaf spring 8 relative to the axle case 11 in the vehicle width direction is restricted between the left and right upright plate portions 41a and 41b.

  As shown in FIGS. 2 and 3, the pad 14 has a pad main body 54, a front fixing portion 55, and a rear fixing portion 56, and is inserted through the insertion space 53 of the stopper bracket 13 to connect the stopper bracket 13. It arrange | positions above the board part 40, the front flange 38, and the rear flange 39, and is fastened and fixed with the bolt 43 and the nut 44 with the stopper bracket 13 with respect to the support bracket 12. FIG. The pad 14 connects the rear end portion 8b of the leaf spring 8 and the stopper bracket 13 to prevent the rear end portion 8b of the leaf spring 8 from coming into contact with the connecting plate portion 40 of the stopper bracket 13 when the vehicle 1 vibrates. When the rear end 8b of the leaf spring 8 and the pad 14 are brought into contact with each other due to vibration of the vehicle 1 or the like due to vibration of the vehicle 1, the pad 14 can be replaced. In the following description, the front-rear direction, the vehicle width direction, and the up-down direction of the pad 14 are directions in a state where the pad 14 is fixed to the axle case 11 by being fixed to the support bracket 12. Show.

  The pad main body 54 is formed thicker than the connecting plate portion 40 of the stopper bracket 13 and is disposed above the connecting plate portion 40. The lower surface 57 of the pad main body 54 is disposed at a height position higher than the upper surfaces 49 and 50 of the front flange 38 and the rear flange 39 of the stopper bracket 13, and is upward from the upper surface 58 of the connecting plate portion 40 of the stopper bracket 13. It is slightly separated from the upper surface 58 of the connecting plate portion 40. The upper surface 59 of the pad main body 54 is curved so that the center side in the front-rear direction bulges upward in a side view.

  The front fixing portion 55 is a front end portion of the pad 14 that continuously extends forward from the front end of the pad main body 54, and the left and right bolt insertion portions 62 (on the left side bolt in FIG. Only the insertion portion 62 is shown), and an intermediate portion 63 between the left and right bolt insertion portions 62. The planar lower surface 61 of the front fixing portion 55 is in surface contact with the planar upper surface 49 of the front flange 38 of the stopper bracket 13. The left and right bolt insertion portions 62 each have a bolt insertion hole 64 penetrating in the vertical direction. The left and right bolt insertion holes 64 include two bolt insertion holes 46 (see FIG. 5) of the front flange 38 of the stopper bracket 13 and two bolt insertion holes 30 (see FIG. 4) of the front flange support portion 20 of the support bracket 12. Communicate with both. The upper surface 65 of the intermediate portion 63 continuously extends forward and downward from the upper surface 59 of the pad main body 54. The upper surfaces 60 of the left and right bolt insertion portions 62 are disposed below the upper surface 65 of the intermediate portion 63.

  The rear fixing portion 56 is provided on the rear side of the pad main body 54 symmetrically with the front fixing portion 55, and is a rear end portion of the pad 14 extending continuously rearward from the rear end of the pad main body 54, and in the vehicle width direction. It has left and right bolt insertion portions 66 arranged on both sides, and an intermediate portion 67 between the left and right bolt insertion portions 66. The planar lower surface 68 of the rear fixing portion 56 is in surface contact with the planar upper surface 50 of the rear flange 39 of the stopper bracket 13. The left and right bolt insertion portions 66 each have a bolt insertion hole 69 penetrating in the vertical direction. The left and right bolt insertion holes 69 include two bolt insertion holes 48 (see FIG. 5) of the rear flange 39 of the stopper bracket 13 and two bolt insertion holes 32 of the rear flange support portion 22 of the support bracket 12 (see FIG. 4). Communicate with both. The upper surface 70 of the intermediate part 67 extends rearward and downward continuously from the upper surface 59 of the pad main body 54. The upper surfaces 71 of the left and right bolt insertion portions 66 are disposed below the upper surface 70 of the intermediate portion 67.

  As shown in FIG. 3, when the stopper bracket 13 and the pad 14 are fixed to the support bracket 12 welded to the axle case 11, the stopper bracket 13 is placed above the support bracket 12. A pad 14 is placed above 13. Then, with the bolt insertion holes 64 and 69 of the pad 14, the bolt insertion holes 46 and 48 of the stopper bracket 13 and the bolt insertion holes 30 and 32 of the support bracket 12 being in communication, the four bolts 43 are inserted from above. Then, the nut 44 is fastened and fixed from below.

  In the leaf spring support structure 10 configured as described above, the support bracket 12 has an upper plate portion 23 connected to the front flange support portion 20 and the rear flange support portion 22, and the lower surface of the upper plate portion 23. 34 is fixed to the axle case 11 with the upper surface 29 in contact therewith. For this reason, when the vehicle 1 vibrates or the like, a vertical load input from the front and rear flanges 38 and 39 of the stopper bracket 13 to the front and rear flange support portions 20 and 22 of the support bracket 12 is used. To the axle case 11 side. Therefore, concentration of load from the front and rear flanges 38 and 39 of the stopper bracket 13 to the front and rear flange support portions 20 and 22 of the support bracket 12 can be suppressed, and the front and rear flange support portions 20 and 22 of the support bracket 12 can be suppressed. Breakage can be prevented.

  Further, since the support bracket 12 has ribs 24a and 24b that support the front and rear flange support portions 20 and 22 from the lower front plate portion 19 or the rear plate portion 21 side, from the front and rear flanges 38 and 39 of the stopper bracket 13. It is possible to prevent breakage of the flange support portions 20 and 22 before and after the support bracket 12 due to an input downward load.

  The ribs 24c, 24d, 24e, and 24f that connect the upper plate portion 23 of the support bracket 12 and the front and rear flange support portions 20 and 22 are formed in a plate shape that intersects with the vehicle width direction. High rigidity against load. Therefore, it is possible to prevent the front and rear flange support portions 20 and 22 from being damaged when a vertical load is input from the front and rear flanges 38 and 39 of the stopper bracket 13 to the front and rear flange support portions 20 and 22 of the support bracket 12. Can do.

  Therefore, according to the present embodiment, it is possible to prevent the flange support portions 20 and 22 from being damaged by the load from the flanges 38 and 39 of the stopper bracket 13.

  Further, the support bracket 12 is fixed to the axle case 11 with the rear end side of the front flange support portion 20 in contact with the case front surface 25 and the front end side of the rear flange support portion 22 in contact with the case rear surface 28. The support rigidity of the support bracket 12 against the load in the front-rear direction input to the front and rear flange support portions 20 and 22 of the support bracket 12 from the front and rear flanges 38 and 39 of the stopper bracket 13 at the time of vibration 1 can be increased.

  Further, on both sides in the vehicle width direction of the front and rear flanges 38 and 39 of the stopper bracket 13, ribs 24c, 24d, 24e and 24f of the support bracket 12 stand at positions adjacent to the front and rear flanges 38 and 39. ing. Therefore, the front and rear flanges 38 and 39 of the stopper bracket 13 can be supported from both sides in the vehicle width direction by the ribs 24c, ribs 24d, ribs 24e, and ribs 24f of the support bracket 12, so that, for example, when the vehicle 1 vibrates. The support rigidity of the support bracket 12 against the load in the vehicle width direction input from the front and rear flanges 38 and 39 of the stopper bracket 13 can be increased.

  Further, the front and rear flanges 38 and 39 of the stopper bracket 13 are fastened and fixed to the front and rear flange support portions 20 and 22 of the support bracket 12 by bolts 43 and nuts 44, respectively, so that the bolts 43 and nuts 44 are loosened. Thus, the stopper bracket 13 can be detached from the support bracket 12. For this reason, for example, when the brake is attached to the outer end of the axle case 11 in the vehicle width direction, the brake is attached with the stopper bracket 13 removed from the support bracket 12 welded to the axle case 11. Thus, a work space for mounting the brake can be secured above the axle case 11.

  Further, since the upper surfaces 31 and 33 of the flange support portions 20 and 22 before and after the support bracket 12 are disposed below the case upper surface 29 of the axle case 11, the flanges 38 and 39 at the front and rear of the stopper bracket 13 correspondingly. And the bolt insertion parts 62 and 66 of the pad 14 can be arrange | positioned in a low position, and the protrusion of the volt | bolt 43 and the nut 44 to upper direction can be suppressed. For this reason, when the vehicle 1 vibrates, the interference between the bolt 43 and the nut 44 and the leaf spring 8 can be prevented.

  In the present embodiment, the case front surface 25, the case rear surface 28, and the case upper surface 29 of the axle case 11 are planar, but the present invention is not limited to this. The cross-sectional shape that intersects the vehicle width direction of the left and right extending portions 11b of the axle case 11 is not limited to a substantially rectangular shape.

  In the present embodiment, the rear surface 26 of the front plate portion 19 of the support bracket 12, the front surface 27 of the rear plate portion 21, the upper surface 31 of the front flange support portion 20, the upper surface 33 of the rear flange support portion 22, and the upper plate portion 23. Although the lower surface 34 of this is made flat, it is not limited to this.

  In this embodiment, the support bracket 12 is fixed to the axle case 11 by welding, but may be fixed by a method other than welding.

  In the present embodiment, the upper plate portion 23 of the support bracket 12 and the front and rear flange support portions 20 and 22 are connected by ribs 24c, 24d, 24e, and 24f, and the upper plate portion 23 and the front and rear flange support portions 20, However, the present invention is not limited to this. The upper plate portion 23 and the front and rear flange support portions 20 and 22 may be connected without providing the openings 36 and 37 between the upper plate portion 23 and the front and rear flange support portions 20 and 22.

  In the present embodiment, the support bracket 12 is provided with the front plate portion 19 and the rear plate portion 21, but the front plate portion 19 and the rear plate portion 21 may not be provided.

  In the present embodiment, the upper surfaces 31 and 33 of the front and rear flange support portions 20 and 22 of the support bracket 12 are disposed below the case upper surface 29 of the axle case 11. The height positions of the upper surfaces 31 and 33 are not limited to this. For example, the upper surfaces 31 and 33 may be disposed at substantially the same height as the case upper surface 29, or may be disposed above the case upper surface 29. .

  In the present embodiment, the rear end side of the front flange support portion 20 of the support bracket 12 is brought into contact with the case front surface 25, and the front end side of the rear flange support portion 22 is brought into contact with the case rear surface 28. The flange support portions 20 and 22 may not be in contact with the case front surface 25 or the case rear surface 28.

  In the present embodiment, the upper and lower surfaces 49 and 45 of the front flange 38 and the upper and lower surfaces 50 and 47 of the rear flange 39 of the stopper bracket 13 are planar, but the present invention is not limited to this.

  In the present embodiment, the lower surface 61 of the front fixing portion 55 and the lower surface 68 of the rear fixing portion 56 of the pad 14 are planar, but the present invention is not limited to this.

  The number of bolt insertion holes 30 and 32 of the support bracket 12, the bolt insertion holes 46 and 48 of the stopper bracket 13, the bolt insertion holes 64 and 69 of the pad 14, and the bolts 43 and nuts 44 are limited to the above. is not.

  Further, the shape of the pad 14 is not limited to the above, and various shapes can be applied to the pad.

  In this embodiment, the leaf spring support structure 10 includes the pad 14, but the pad 14 may not be included.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

1: Vehicle 8: Leaf spring 8b: Rear end of leaf spring (end of leaf spring)
10: Leaf spring support structure 11: Axle case 12: Support bracket 13: Stopper bracket 20: Front flange support portion 22: Rear flange support portion 23: Upper plate portion 25: Case front surface 28: Case rear surface 29: Case upper surface 31: Front Upper surface 33 of flange support portion: Upper surface 34 of rear flange support portion: Lower surface 38 of upper plate portion: Front flange 39: Rear flange 40: Connection plate portion (spring support portion)

Claims (3)

A leaf spring support structure for supporting an end portion of a leaf spring from an axle case side extending in a vehicle width direction of the vehicle,
A front flange support portion that is disposed in front of the case front of the axle case and intersects with the vertical direction; a rear flange support portion that is disposed behind the case rear surface of the axle case and intersects with the vertical direction; and An upper plate portion disposed above the upper surface of the case and connected to the front flange support portion and the rear flange support portion, and the lower surface of the upper plate portion is in contact with the upper surface of the case. A support bracket fixed to the axle case;
A front flange fastened and fixed in contact with the front flange support portion of the support bracket from above; a rear flange fastened and fixed in contact with the rear flange support portion of the support bracket from above; A spring support portion that is disposed above the upper plate portion of the support bracket, connects the front flange and the rear flange, and supports an end portion of the leaf spring from below; A leaf spring support structure, comprising: a stopper bracket that restricts movement of the end portion of the leaf spring in the vehicle width direction. The leaf spring support structure according to claim 1,
The leaf spring support structure, wherein an upper surface of the front flange support portion and an upper surface of the rear flange support portion of the support bracket are disposed below the case upper surface of the axle case. The leaf spring support structure according to claim 1 or 2,
The support bracket is fixed to the axle case in a state where a rear end side of the front flange support portion is in contact with the front surface of the case and a front end side of the rear flange support portion is in contact with the rear surface of the case. Leaf spring support structure.

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