JP2017087934A - Attachment structure of brake chamber bracket and drive axle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of a brake chamber bracket and a drive axle capable of avoiding damage of a brake chamber with no installation of a protective cover.SOLUTION: The attachment structure of a brake chamber bracket is welded to an axle case which has a long-size shape, is oriented along an axle direction as a longitudinal direction, and includes a dome part expanding toward a rear side of a vehicle in a substantially hemispherical shape in a center part of the longitudinal direction. The brake chamber bracket comprises: a pedestal part to which a brake chamber is attached; and a first leg and a second leg extending from both sides of the axle direction at the pedestal part. The first leg and the second leg are welded to the axle case so that the pedestal part is arranged at upper side with respect to the top position of the dome part and at an end part side of the axle direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a brake chamber bracket mounting structure and a drive axle.

  For example, a brake chamber is provided at a position behind the vehicle with respect to the rear axle. Since the brake chamber provided at such a position is relatively close to the road surface, a protrusion on the road surface may collide with the brake chamber due to the rearward movement of the vehicle. In addition, pebbles may hit the brake chamber while the vehicle is running, or mud may enter the brake chamber. These causes damage the brake chamber. A protective cover is provided to prevent damage to the brake chamber.

  For example, a trunnion type suspension is used as one of the suspension systems used in the case of the rear wheel biaxial. The trunnion suspension is suitable for reliably transmitting the axle driving force to the road surface, has excellent load durability, and is used in large trucks. For example, the trunnion suspension has a V rod and a torque rod that connect the axle to the vehicle body frame, and a leaf spring that absorbs the vertical movement of the axle.

  The rear axle on the rear two-wheel shaft is divided into a drive axle having a role of sharing the vehicle load and a drive axle having a role of transmitting the driving force to the axle, and a dead axle having only a role of sharing the vehicle load. For example, a drive axle is used for two axes (front axis and rear axis). Also, a drive axle is used for the front axle and a dead axle is used for the rear axle.

  FIG. 1 is a view of the axle case 3 of the drive axle 2 as viewed from the rear of the vehicle. As shown in FIG. 1, a bulging portion 31 is provided at the center portion in the longitudinal direction of the axle case 3. Between the pair of body frames 1, 1 is an upper space 4 of the bulging portion 31 of the axle case 3.

  For example, Patent Document 1 discloses a suspension bracket 5, a brake chamber bracket 6 on the right side of the suspension bracket 5, and a brake chamber bracket 7 on the left side, which are welded to the upper surface of the bulging portion 31 of the axle case 3. ing.

  A rear end portion of a V rod (not shown) of a trunnion type suspension is connected to the suspension bracket 5, and a front end portion of the V rod is connected to a pair of support brackets 12, 12 on the body frame 1, 1 side. Hereinafter, the space between the pair of body frames 1 and above the center portion of the axle case is referred to as an upper space 4 when viewed as a component mounting space, and is viewed as a work space when performing component mounting work. Sometimes called workspace 4. In general, the bezel, the device for raising and lowering the bezel, and the like are provided above the body frame 1, and thus no parts related to the rear axle are provided.

  The central portion of the upper space 4 becomes a work space 4A when the rear end portion of the V rod is connected to the suspension bracket 5. Further, both end portions of the upper space 4 serve as a work space 4B when the front end portion of the V rod is connected to the support brackets 12 and 12.

JP 2010-1000024 Gazette

  In recent years, from the viewpoint of manufacturing cost and design freedom, it has been proposed to make the shape of the body frame 1 straight along the vehicle longitudinal direction and to narrow the width between the pair of body frames 1. Thereby, the upper space 4 becomes narrow. In order to ensure sufficient rigidity to withstand higher loads, it has been proposed to make the suspension bracket 5 large, and thereby the central portion of the upper space 4 is largely occupied by the suspension bracket 5. The central portion of the upper space 4 is also a work space 4 </ b> A when the rear end portion of the V rod is connected to the suspension bracket 5. Further, it is necessary to secure work spaces 4B at both ends of the upper space 4 when the front end portion of the V rod is connected to the support bracket 12 on the vehicle body frame 1 side. As a result, the empty space of the upper space 4 becomes very small, and there is a current situation that parts other than the suspension bracket cannot be provided on the upper surface of the axle case 3.

  In order to avoid damage to the brake chamber without providing a protective cover, it is preferable to provide the brake chamber at a high position above the ground. Therefore, for example, as shown in Patent Document 1, the brake chamber bracket may be provided on the upper surface of the axle case. However, due to the above-described current situation, the brake chamber bracket cannot be provided on the upper surface of the axle case. is there.

  An object of the present invention is to provide a brake chamber bracket mounting structure and a drive axle capable of avoiding damage to a brake chamber without providing a protective cover while securing a working space.

In order to achieve the above object, the brake chamber bracket mounting structure according to the present invention includes:
Installation of a brake chamber bracket to be welded to an axle case having a long shape, arranged in the longitudinal direction as an axle direction, and having a dome portion that swells in a substantially hemispherical shape at the rear of the vehicle at the center in the longitudinal direction In structure
The brake chamber bracket is
A pedestal to which the brake chamber is mounted;
A first leg and a second leg extending from both ends of the pedestal in the axle direction;
Have
The first leg portion and the second leg portion are welded to the axle case so that the pedestal portion is provided at a position on the upper side of the dome portion and on the end side in the axle direction.

The drive axle according to the present invention is
In a drive axle in which a brake chamber bracket is welded to an axle case having a long shape and having a dome portion that swells in a substantially hemispherical shape in a direction perpendicular to the longitudinal direction at the center in the longitudinal direction,
The brake chamber bracket is
A pedestal to which the brake chamber is mounted;
A first leg and a second leg extending from both ends in the longitudinal direction of the pedestal;
Have
The first leg is welded to the dome, and the second leg is welded to the axle case outside the dome.

  According to the present invention, the first leg portion and the second leg portion are welded to the axle case so that the pedestal portion is provided above the position of the top portion of the dome portion and at the end portion side in the axle direction. Thereby, since the brake chamber can be arranged at a higher position above the ground level, the work space is ensured, and the protective cover is not provided, so that damage to the brake chamber can be avoided.

  Moreover, the rigidity with respect to a deformation | transformation of a dome part can be improved by connecting a dome part and an axle case, and the crack from the welding part which has connected the axle case and the dome part can be prevented.

It is the fragmentary view which looked at the conventional axle case from back. It is the fragmentary perspective view which looked at the axle case which concerns on embodiment of this invention from diagonally backward. It is the figure which looked at the axle case which concerns on embodiment of this invention from the vehicle rear. It is the figure which looked at the axle case which concerns on embodiment of this invention from the vehicle side. It is the figure which looked at the drive axle concerning an embodiment of the invention from the vehicles back.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a partial perspective view of the axle case as seen from the obliquely rearward side of the vehicle.

  As shown in FIG. 2, the axle case 3 that is the main body of the drive axle 2 has a long cylindrical shape, and has a bulging portion 31 at the center in the longitudinal direction, and the bulging portion 31 has a differential gear. It has a gear housing portion 32 for housing a box (not shown), and a shaft housing portion 33 for housing the wheel drive shafts disposed on both sides of the bulge portion 31. The gear housing portion 32 is provided with an opening (not shown) that is opened to the rear of the vehicle. The bulging portion 31 includes an upper surface curved portion 34 in which the upper surface of the axle case 3 is curved upward in an arc shape, a lower surface curved portion 35 in which the lower surface of the axle case 3 is curved downward in an arc shape, and a substantially hemispherical rearward side And a dome portion 36 that swells into a shape. The dome portion 36 is a lid attached so as to cover the opening portion of the gear housing portion 32 from the vehicle rear side.

  FIG. 3 is a view of the axle case 3 as seen from the rear of the vehicle. As shown in FIG. 3, the axle case 3 is arranged with the longitudinal direction as the axle direction. The suspension bracket 5 is welded to the upper curved portion 34. Thereby, the central portion of the upper space 4 is occupied by the suspension bracket 5. If some parts are attached to both ends of the upper space 4, here, both sides of the upper curved portion 34, both ends of the upper space 4 become narrow according to the size of the parts, and the front end of the V rod The working space 4B when connecting to the support bracket 12 is also narrowed. For this reason, the parts attached to both ends of the upper space 4 are limited in size.

  In the present embodiment, the brake chamber 8 (see FIG. 5) and the brake chamber brackets 6 and 7 cannot be provided at both ends of the upper space 4 because the size exceeds the limit. That is, the brake chamber 8 or the like cannot be provided in any of the upper spaces 4. Therefore, it is conceivable to provide the brake chamber 8 and the like at a position away from the upper space 4 toward the rear of the vehicle. However, if the brake chamber 8 or the like is simply provided at the position behind the vehicle in the upper space 4, the work space 4 may be blocked from the rear of the vehicle. There is a need to.

  As shown in FIG. 3, the center position 41 in the axle direction coincides with the center position of the upper space 4. On the other hand, the differential gearbox is disposed at a position shifted by a length L in the left direction from the center position 41 in the axle direction. For this reason, the upper surface curved portion 34, the lower surface curved portion 35, and the dome portion 36 are provided at positions shifted from the center position 41 by the length L in the left direction.

  The brake chamber bracket 6 is provided at a position on the right side of the center position 41. The brake chamber bracket 7 is provided at a position on the left side of the center position 41. The distance from the center position 605a (see FIG. 4) of the through hole 605 of the brake chamber bracket 6 to the center position 41 is the distance from the center position 705a (see FIG. 4) of the through hole 705 of the brake chamber bracket 7 to the center position 41. Is equal to The through holes 605 and 705 are holes through which the push rod 81 (see FIG. 4) of the brake chamber 8 passes. Since the dome portion 36 is provided at a position shifted by a length L in the left direction from the center position 41, the distance to the position of the top portion 37 of the dome portion 36 is the center position 605a of the through hole 605 of the right brake chamber bracket 6 ( 4) is longer than the direction from the center position 705a (see FIG. 4) of the through hole 705 of the left brake chamber bracket 7. Here, the top portion 37 refers to a position at the farthest distance from the plane and its vicinity in the dome portion 36 when the opening is closed with a plane.

  First, the right brake chamber bracket 6 will be described with reference to FIGS. 2 to 4, and then the left brake chamber bracket 7 will be described.

  As shown in FIG. 3, the brake chamber bracket 6 includes a pedestal portion 60, a first leg portion 61, and a second leg portion 62. The pedestal 60, the first leg 61, and the second leg 62 are integrally formed by, for example, pressing a piercing, trimming, bending or the like on a steel flat plate having a predetermined thickness.

  The pedestal portion 60 is mounted with the brake chamber 8 (see FIG. 5). The first leg portion 61 and the second leg portion 62 allow the pedestal portion 60 to be located above the position of the top portion 37 of the dome portion 36 and end in the axle direction. It is provided at the position on the part side (right side). The height from the axle to the center position 605a of the through hole 605 is preferably 150 [mm] to 210 [mm], and more preferably 170 [mm] to 190 [mm]. Here, the reason why it is set to 150 [mm] or more is that if it is less than 150 [mm], the mounting position of the brake chamber 8 is lowered, which is contrary to disposing the brake chamber 8 at a higher position above the ground. . The reason why it is set to 200 [mm] or less is that when it exceeds 200 [mm], the brake chamber 8 blocks the work space 4 from the rear of the vehicle. The central position 605a of the through hole 605 may be referred to as the “attachment position” of the brake chamber 8.

  FIG. 4 is a view of the axle case 3 as viewed from the side. A brake chamber bracket 7 is shown on the front side, and a brake chamber bracket 6 is shown on the back side. Hereinafter, the brake chamber bracket 6 will be described as a representative. As shown in FIG. 4, the pedestal portion 60 is inclined obliquely upward toward the rear of the vehicle. The inclination angle θ of the pedestal 60 with respect to the horizontal plane is preferably 0 ° to 20 °, and more preferably 5 ° to 15 °. Here, the inclination angle θ is set to 0 ° or more. When the inclination angle θ is less than 0 °, the mounting position of the brake chamber 8 is lowered, and the brake chamber 8 is disposed at a higher ground level. This is to go against it. The reason why the inclination angle θ is set to 20 ° or less is that when the inclination angle θ exceeds 20 °, the mounting position of the brake chamber 8 becomes high, and the brake chamber 8 blocks the work space 4 from the rear of the vehicle. .

  The brake chamber 8 can be provided at a desired position by combining the inclination angle θ of the pedestal 60 and the height of the center position 605a. For example, when the inclination angle θ is 20 °, the height of the central position 605a is 210 [mm], and when the inclination angle θ is 10 °, the height of the central position 605a is 180 [mm], and the inclination angle θ is When the angle is 0 °, the brake chamber 8 is provided at a desired position by setting the height of the center position 605a to 150 [mm].

  As shown in FIG. 4, when the bush rod 81 of the brake chamber 8 is operated with a predetermined stroke in the A1 direction, the slack adjuster 82 rotates around the brake cam shaft 83 in the A2 direction. As a result, the rotational force of the brake camshaft 83 is transmitted to the brake portion, and a braking force is generated.

  As shown in FIG. 2, the outer peripheral edge of the pedestal portion 60 includes a front edge 601, a left end edge 602, a right end edge 603, and a rear edge 604.

  The front edge 601 of the pedestal portion 60 is welded to the rear wall 39 of the axle case 3 outside the dome portion 36. A first leg portion 61 is provided on the left end edge 602 side of the pedestal portion 60. A second leg portion 62 is provided on the right end edge 603 side of the pedestal portion 60.

  First, the first leg portion 61 will be described. The first leg portion 61 is a position of the peripheral portion 38 of the dome portion 36 and is a position on the upper side and the end side in the axle direction with respect to the position of the top portion 37 (the position of the left end edge 602 of the pedestal portion 60 shown in FIG. 2). ) To the right vicinity of the top portion 37 along the dome portion 36. The inclined portion 611 is welded to the dome portion 36.

  As shown in FIGS. 2 and 3, by extending the inclined portion 611 from the left end edge 602 of the pedestal portion 60 to a position obliquely below (a position near the right of the top portion 37), a sufficient welding length can be secured. If the inclined portion 611 is not provided, for example, the width between the left end edge 602 and the right end edge 603 of the pedestal portion 60 is widened so that the left end edge 602 of the pedestal portion 60 is positioned above the top portion 37. As a result, the weight of the brake chamber bracket 6 is increased. On the other hand, the brake chamber bracket 6 can be reduced in weight by providing the inclined portion 611 as in the present embodiment.

  Furthermore, by providing the inclined portion 611 on the first leg portion 61, a sufficient space is formed between the first leg portion 61 and the first leg portion 71 (described later) of the left brake chamber bracket 7. When the part 611 is welded to the dome part 36 and the front edge 711 of the first leg part 71 is welded to the dome part 36, a sufficient space is formed between the two parts, so that the welding operation is facilitated. Can do.

  The first leg portion 61 has a substantially inverted triangular shape with the inclined portion 611 as one side. One of the other two sides of the substantially inverted triangular shape is a side edge 612 along the left end edge 602 of the pedestal portion 60, and the other side of the two sides is the side edge 612 from the lower end of the inclined portion 611. It is the edge 613 extended to the rear end. By making the 1st leg part 61 into a substantially inverted triangle shape and making the one side into the inclined part 611, while being able to ensure weld length enough, weight reduction can be achieved.

  Next, the second leg portion 62 will be described. The second leg portion 62 is provided on the right end edge 603 side of the pedestal portion 60. A front edge 621 of the second leg portion 62 is outside the dome portion 36 and is welded to the rear wall 39 of the axle case 3. The rear edge 622 of the second leg portion 62 is a flange portion 623 provided from the front edge 621 along the rear end of the right end edge 603 of the pedestal portion 60 and having a width of a predetermined length or more. A recess 624 for allowing the brake camshaft 83 (see FIG. 5) to pass is provided in a part of the flange portion 623. In order to increase the rigidity of the brake chamber bracket 6, a flange portion may be provided on the rear edge 604 of the pedestal portion 60 so that the edge 613 and the flange portion 623 are continuous via the flange portion.

  Next, the left brake chamber bracket 7 having a shorter distance to the position of the top portion 37 of the dome portion 36 will be described with reference to FIGS. Note that the brake chamber bracket 7 is mainly described in a configuration different from that of the brake chamber bracket 6, and the description of the same configuration is omitted.

  The brake chamber bracket 7 has a pedestal portion 70, a first leg portion 71, and a second leg portion 72.

  The pedestal portion 70 is mounted with the brake chamber 8 (see FIG. 5). The first leg portion 71 and the second leg portion 72 allow the pedestal portion 70 to be positioned above the position of the top portion 37 of the dome portion 36 and end in the axle direction. It is provided at the position on the part side (left side).

  The outer peripheral edge of the pedestal portion 70 includes a front edge 701, a left end edge 702, a right end edge 703, and a rear edge 704. The front edge 701 of the base part 70 is welded to the dome part 36.

  First, the first leg 71 will be described. The first leg portion 71 is provided on the right end edge 703 side of the pedestal portion 70. It has a front edge 711 that extends from the position above the position of the top portion 37 to the left vicinity of the top portion 37 along the dome portion 36 at the position of the peripheral portion 38 of the dome portion 36. A front edge 711 of the first leg portion 71 is welded to the dome portion 36. The brake chamber bracket 7 has a distance to the position of the top portion 37 shorter than that of the right brake chamber bracket 6, and the right end edge 703 of the pedestal portion 70 is located above the position near the left of the top portion 37. The leg portion 71 extends almost directly from the right end edge 703 side of the pedestal portion 70, and there is no need to provide the inclined portion 611 described above.

  The first leg 71 has a substantially inverted triangular shape with the front edge 711 as one side. One of the other two sides of the substantially inverted triangular shape is a side edge 712 along the right edge 703 of the pedestal portion 70, and the other side of the two sides is a side edge 712 from the lower end of the front edge 711. It is the edge 713 extended to the rear end.

  Next, the second leg portion 72 will be described with reference to FIGS. The second leg portion 72 is provided on the left end edge 702 side of the pedestal portion 70. The configuration of the second leg portion 72 is basically the same as that of the second leg portion 62. That is, the front edge 721 of the second leg portion 72 is outside the dome portion 36 and is welded to the rear wall 39 of the axle case 3. The rear edge 722 of the second leg portion 72 is a flange portion 723 provided from the front edge 721 along the rear end of the left end edge 702 of the pedestal portion 70 and having a width of a predetermined length or more. A concave portion 724 for passing the brake cam shaft 83 is provided in a part of the flange portion 723 (see FIG. 4). In order to increase the rigidity of the brake chamber bracket 7, a flange portion may be provided on the rear edge 704 of the pedestal portion 70, and the edge 713 and the flange portion 723 may be continuous via the flange portion.

  Next, other parts assembled to the axle case 3 will be described with reference to FIG. FIG. 5 is a view of the drive axle 2 as seen from the rear of the vehicle.

  As shown in FIG. 5, the rear end portion 91 of the V rod 9 is connected to the suspension bracket 5. The front end 92 of the V rod 9 is connected to the support bracket 12 of the vehicle body frame 1. At both ends of the upper space 4 between the pair of body frames 1, work spaces 4B for connecting the front end 92 of the V rod 9 to the support bracket 12 from the rear of the vehicle with bolts are provided. A work space 4 </ b> A for connecting to the rear end 91 suspension bracket 5 of the V rod 9 with a bolt from the rear of the vehicle is provided at the center of the upper space 4. Brake chambers 8 and 8 are provided by chamber brackets 6 and 7 at positions where the work space 4A is not blocked from the rear of the vehicle.

  According to this configuration, the brake chamber is adjusted by adjusting the leg lengths of the first leg portions 61 and 71 and the second leg portions 62 and 72 and by adjusting the inclination angle θ of the pedestal portions 60 and 70 with respect to the horizontal plane. 8, 8 can be provided at a desired position with a higher ground clearance.

  A hanger bracket 94 for supporting the end of the leaf spring 93 is welded to the upper surface of the end of the axle case 3. A torque rod bracket 96 to which the rear end portion of the torque rod 95 is coupled is welded to the lower surface of the end portion of the axle case 3.

  According to the mounting structure of the brake chamber brackets 6 and 7 according to the present embodiment, the brake chamber 8 is raised above the ground via the pedestal portions 60 and 70 by the first leg portions 61 and 71 and the second leg portions 62 and 72. Since the working space 4 can be provided at a higher position and not obstructed from the rear, the work chamber 4 is secured and the protective chamber is not provided, and damage to the brake chambers 8 and 8 is avoided. be able to.

  The axle case 3 receives vertical input (force that is pushed vertically downward from a leaf spring (not shown)). Thereby, the dome part 36 deform | transforms and there exists a possibility that the crack may generate | occur | produce in the welding part which welds the dome part 36 and the axle case 3. FIG. In the present embodiment, the first leg portions 61 and 71 are welded to the dome portion 36, and the second leg portions 62 and 62 are welded to the axle case 3 outside the dome portion 36, whereby the brake chamber bracket 6, 7 connects the dome portion 36 and the axle case 3 together. Thereby, the rigidity of the dome part 36 can be improved, the deformation | transformation of the dome part 36 can be suppressed, and it can prevent that a crack generate | occur | produces in a welding part.

  As shown in FIG. 4, when the push rod 81 of the brake chamber 8 is operated in the A1 direction, a reaction force in the R1 direction (perpendicular direction) is applied to the pedestal portion 60. Here, in the first leg portion 61, the inclined portion 611 is welded to the dome portion 36, and the front edge 621 is welded to the outer wall 39. Since the rigidity of the leg part 61 is increased and the rigidity of the second leg part 62 is increased by the flange part 623 of the second leg part 62, the displacement and deformation of the pedestal part 60 due to the reaction force can be suppressed. Further, as shown in FIG. 4, the position of the inclined portion 611 welded to the dome portion 36 (welding position) is about 50 mm to about 100 mm from the line in the R1 direction where the reaction force acts. Thus, a force is generated that pulls in the R2 direction opposite to the R1 direction along the line in the R1 direction at the welding position relatively close. Also by this, the displacement and deformation of the pedestal portion 60 due to the reaction force can be suppressed.

  Similarly, in the second leg portion 71, the front edge 711 is welded to the dome portion 36, and the front edge 721 is welded to the outer wall 39. Since the rigidity of the leg part 71 is increased and the rigidity of the second leg part 72 is increased by the flange part 723 of the second leg part 72, the displacement and deformation of the base part 70 due to the reaction force can be suppressed. Further, as shown in FIG. 4, the position (welding position) of the welded portion of the front edge 711 welded to the dome portion 36 is about 50 mm to about 75 mm from the line in the direction in which the reaction force acts. A force that pulls in a direction opposite to the reaction force direction along the line of the reaction force direction is generated relatively close to the welding position. Also by this, the displacement and deformation of the pedestal portion 70 due to the reaction force can be suppressed.

  In the above-described embodiment, the brake chamber bracket 6 and the like have been described as being welded to the axle case 3 of the drive axle 2 used for the rear axle of the two rear wheels. However, the present invention is not limited to this. For example, the brake chamber bracket 6 or the like may be welded to the axle case 3 of the drive axle 2 used for the front axle of the rear wheel biaxial.

  In addition, each of the above-described embodiments is merely an example of a specific example for carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 1 Body frame 2 Drive axle 3 Axle case 4 Upper space 5 Suspension brackets 6, 7 Brake chamber bracket 8 Brake chamber 36 Dome part 37 Top part 60, 70 Base part 61, 71 First leg part 62, 72 Second leg part 611 Inclination Part

Claims (5)

Installation of a brake chamber bracket to be welded to an axle case having a long shape, arranged in the longitudinal direction as an axle direction, and having a dome portion that swells in a substantially hemispherical shape at the rear of the vehicle at the center in the longitudinal direction In structure
The brake chamber bracket is
A pedestal to which the brake chamber is mounted;
A first leg and a second leg extending from both ends of the pedestal in the axle direction;
Have
Welding the first leg portion and the second leg portion to the axle case so as to provide the pedestal portion at a position on the upper side of the dome portion and on the end side in the axle direction;
Brake chamber bracket mounting structure. Welding the first leg to the dome;
The brake chamber bracket mounting structure according to claim 1, wherein the second leg portion is welded to the axle case outside the dome portion.   The first leg portion is a position of a peripheral portion of the dome portion, and extends from a position on the upper side with respect to the position of the top portion and an end side in an axle direction to a position near the top portion along the dome portion. The brake chamber bracket mounting structure according to claim 1, further comprising an inclined portion welded to the dome portion.   The brake chamber bracket mounting structure according to claim 3, wherein the first leg portion has a substantially inverted triangular shape with the inclined portion as one side. In a drive axle in which a brake chamber bracket is welded to an axle case having a long shape and having a dome portion that swells in a substantially hemispherical shape in a direction perpendicular to the longitudinal direction at the center in the longitudinal direction,
The brake chamber bracket is
A pedestal to which the brake chamber is mounted;
A first leg and a second leg extending from both ends in the longitudinal direction of the pedestal;
Have
Welding the first leg to the dome and welding the second leg to the axle case outside the dome;
Drive axle.

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