JP2017119468A - Stopper bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper bracket which enables replenishment of a wear part to be easily conducted without replacing components.SOLUTION: Stopper brackets 10L, 10R support a spring end part of a leaf spring 8 on an axle case 3 and include: a base part 11 having a plane part 11a fixedly disposed on the axle case 3 and made of a sheet metal; and a bead build-up part 12 which is formed on an upper surface of the plane part of the base part so as to contact with a lower surface of the spring end part of the leaf spring placed on the plane part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stopper bracket that is interposed between an end of a leaf spring and an axle case in a vehicle suspension system.

  A trunnion-type rear suspension is known as one of the suspension devices used in a vehicle having two rear wheels. The trunnion type rear suspension is suitable for reliably transmitting the driving force of the axle to the road surface, has excellent load resistance, and is widely used in large trucks and the like. A trunnion-type rear suspension generally has a V rod and a torque rod that connect a rear axle (rear axle) to a vehicle body frame, and left and right leaf springs that absorb the vertical movement of the rear axle.

  In a rear-wheel biaxial vehicle, the rear axle has a drive axle that is responsible for sharing the vehicle load and a drive axle that is responsible for transmitting the driving force to the axle, and a dead axle that is only responsible for sharing the vehicle load (driven). Axle). For example, there is a vehicle in which a drive axle is used for both two axes (front and rear axes), and a vehicle in which a drive axle is used for the front axis and a dead axle is used for the rear axis.

  In this type of trunnion type rear suspension, a trunnion shaft is attached to a vehicle body frame via a bracket, and left and right end portions of the left and right leaf springs are connected to the left and right ends of the trunnion shaft. Then, both ends of the leaf spring in the vehicle front-rear direction are held by the axle case of the front shaft and the rear shaft.

  Normally, a cast spring bracket (equivalent to a stopper bracket) that holds the front and rear ends of the leaf spring is provided on the upper surface of the axle case of the front and rear axles, and the spring end jumps up above the spring bracket. A rebound stopper is provided to prevent this. Conventionally, a cradle is provided on the upper surface of the axle case, a wear pad (also called a spring seat) is fixed on the cradle by bolts and nuts, and an end of the leaf spring is placed on the wear pad. (For example, refer to Patent Document 1).

JP-A-10-203127

  By the way, when the wear pad on which the end of the leaf spring is placed is worn due to long-term running of the vehicle, and the wear pad is heavily worn, it is necessary to replace the wear pad. In addition, there is a problem that it takes time and labor for replacement.

  The present invention has been made in consideration of the above points, and an object of the present invention is to provide a stopper bracket that can easily replenish a worn part without replacing parts.

  The stopper bracket according to the present invention comprises a suspension mechanism that connects the axle and the vehicle body frame and supports a spring end of a leaf spring extending in the vehicle longitudinal direction on an axle case extending in the axle direction, A stopper bracket for restricting the vertical movement of the leaf spring, comprising a sheet metal having a flat portion fixedly disposed on the axle case, and a base portion on which the spring end portion can be placed on the flat portion; And a bead build-up portion formed on the upper surface of the flat portion of the base portion so as to be in contact with the lower surface of the spring end portion placed on the flat portion.

  According to the present invention, the worn portion can be easily replenished simply by regenerating the bead overlay by welding. Therefore, compared with the case where the wear pad is replaced, parts replacement is unnecessary, and the work can be simplified. In addition, unlike the case where the wear pad is attached, a space for fastening the bolt is unnecessary, so that the space can be effectively used. Further, since the base portion is formed of a plate, the manufacturing cost can be reduced as compared with the case where the base is formed of a casting.

It is the figure which looked at the dead axle case provided with the stopper bracket which concerns on embodiment of this invention from back. It is the figure which looked at the dead axle case provided with the stopper bracket which concerns on embodiment of this invention from upper direction. FIG. 3 is a perspective view of a suspension bracket provided in the dead axle case shown in FIGS. 1 and 2. FIG. 3 is a perspective view of a left stopper bracket provided in the dead axle case shown in FIGS. 1 and 2. It is the figure seen from the stopper bracket shown in FIG. It is the figure seen from the back of the stopper bracket shown in FIG. It is AA arrow sectional drawing of FIG. It is the figure which looked at the drive axle case provided with the stopper bracket which concerns on other embodiment of this invention from back. It is the figure which looked at the drive axle case provided with the stopper bracket which concerns on other embodiment of this invention from upper direction. FIG. 10 is a perspective view of a left stopper bracket provided in the drive axle case shown in FIGS. 8 and 9.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view of a dead axle case provided with a stopper bracket according to the embodiment as viewed from the rear, and FIG. 2 is a view of the dead axle case as viewed from above.
In the following description, the “left-right direction” means the left-right direction with the vehicle facing forward. Further, “front-rear direction” means the vehicle front-rear direction, “front” means the front of the vehicle, and “rear” means the rear of the vehicle.

  As shown in FIGS. 1 and 2, the axle case 3 that is the main body of the dead axle 2 has a cylindrical shape with a long rectangular cross section, and is arranged with the long direction set as the axle direction. The axle direction and the longitudinal direction are also referred to as “left-right direction”.

  A suspension bracket 5 is fixed to the center of the upper surface of the axle case 3 by welding. Brake chamber brackets 6 are fixed to the suspension bracket 5 by welding integrally with the left and right sides of the suspension bracket 5. Further, stopper brackets 10L and 10R are joined to the upper surface of the axle case 3 at the end portion on the outer side in the left-right direction with respect to the brake chamber bracket 6.

  The trunnion type suspension (suspension mechanism) interposed between the axle case 3 and the vehicle body frame 1 is provided with a V rod 4, and the front end portion of the V rod 4 is connected to the vehicle body frame 1 via a support bracket 1a. It is connected. As shown in detail in FIG. 3, a bush 41 is provided at the rear end of the V rod 4, and the bush 41 is rotatable around a pin 42. Through holes 43 are provided at both ends of the pins 42, and the pins 42 are connected and fixed to the connecting portions 51 of the suspension bracket 5 by bolts 48 and nuts 49 using the through holes 43. As a result, the bush 41 at the rear end of the V rod 4 is connected to the suspension bracket 5 via the pin 42.

  During traveling, the axle case 3 receives a load that moves relative to the body frame 1 in the up-down direction, the left-right direction, and the front-rear direction. The axle case 3 is allowed to move in the vertical direction when the bush 41 rotates around the pin 42 when receiving a load in the vertical direction. On the other hand, when the axle case 3 receives loads in the left-right direction and the front-rear direction, the movement in those directions is restrained by the V rod 4.

  The brake chamber brackets 6 on the left and right sides of the suspension bracket 5 are erected on the upper surface of the axle case 3 so as to sandwich the suspension bracket 5 from both the left and right sides. A brake chamber 7 is attached to the brake chamber bracket 6 from the rear.

  The left and right stopper brackets 10L and 10R are portions that respectively hold end portions (spring end portions) of the left and right leaf springs 8 in the vehicle front-rear direction, and are formed in left and right symmetrical shapes. Since the left stopper bracket 10L and the right stopper bracket 10R have a common structure except that they have a bilaterally symmetric shape, the left bracket 10L will be described below as a representative.

  4 is a perspective view of the stopper bracket, FIG. 5 is a view seen from above the stopper bracket, FIG. 6 is a view seen from the rear of the stopper bracket, and FIG. 7 is a cross-sectional view taken along line AA in FIG.

  The stopper bracket 10 </ b> L is one of members constituting a trunnion type suspension (suspension mechanism) that connects the dead axle 2 and the vehicle body frame 1. The stopper bracket 10L supports the spring end of the leaf spring 8 extending in the longitudinal direction of the vehicle on the axle case 3 extending in the axle direction, and in this state, functions to regulate the vertical movement of the leaf spring 8. It is a member formed and joined to the upper surface of the axle case 3 by welding.

  As shown in detail in FIGS. 4 to 7, the stopper bracket 10 </ b> L includes a base portion 11 that is fixedly disposed on the axle case 3, and a pair of side wall portions 13 and 14 that are disposed on the left and right sides of the base portion 11. And a rebound stopper pin 15 held at a position above the base portion 11 by a pair of side wall portions 13 and 14. The rebound stopper pin 15 corresponds to a ceiling member that prevents the end of the leaf spring 8 from jumping up.

  The base portion 11 is formed by bending a sheet metal into a U-shaped cross section, and includes a plane portion 11a and a pair of hanging portions 11b and 11b that are suspended while gently curving downward from both front and rear side edges of the plane portion 11a. Have. The flat surface portion 11a is a portion on which the end portion (spring end portion) of the leaf spring 8 is placed on the upper surface. Here, the dimension between the inner side surfaces of the pair of hanging parts 11b, 11b formed parallel to each other is such that the inner side surfaces of the hanging parts 11b, 11b are set when the stopper bracket 10L is set on the upper half of the axle case 3. The dimension is set so as to abut against the opposite outer surface of the axle case 3 in the front-rear direction.

  On the upper surface of the flat portion 11a, a bead build-up portion 12 made of a weld bead is formed instead of a conventional wear pad. A large number of beads of the bead build-up portion 12 are formed in parallel along the front-rear direction. The bead build-up portion 12 is a portion that is in direct contact with the lower surface of the end portion of the leaf spring 8 placed on the flat portion 11a of the base portion 11, and is a portion that is expected to be worn due to sliding of the contact surface. It is.

  The pair of left and right side wall portions 13 and 14 are made of substantially the same shape of sheet metal, are spaced apart from and parallel to each other in the axle direction, and stand on the axle case 3 in this state. Each of the side wall portions 13 and 14 is formed such that the lower half portions 13a and 14a are formed wider and the upper half portions 13b and 14b are formed narrower toward the upper side. The upper half portions 13b and 14b of the side wall portions 13 and 14 extend upward so as to support both end portions of the rebound stopper pin 15, respectively.

  Further, the lower half portions 13a, 14a of the side wall portions 13, 14 are provided with recessed portions 13c, 14c that are opened downward, and both sides sandwiching the recessed portions 13c, 14c form a pair of leg portions 13a1, 14a1. ing. These leg portions 13 a 1 and 14 a 1 are arranged so that the concave portions 13 c and 14 c fit into the upper half of the cross section of the axle case 3 so as to sandwich both outer side surfaces of the axle case 3.

  The base portion 11 is disposed between the pair of left and right side wall portions 13 and 14 formed in this way, and the left and right side edge portions 11a1 and 11b1 (U-shaped edge portions) of the flat surface portion 11a of the base portion 11 and the hanging portion 11b. Are welded to the opposing surfaces of the lower half portions 13a, 14a of the side wall portions 13, 14, respectively. In that case, as shown in FIG. 7, the plane part 11a is located above the upper edge of the recessed part 13c (14c) of the side wall part 13 (14), and a pair of hanging parts 11b are the side wall parts 13 (14). ), The base portion 11 is positioned so as to extend along the pair of leg portions 13a1 (14a1). In this state, the base portion 11 and the side wall portion 13 (14) are joined by welding.

  The cylindrical rod-shaped rebound stopper pin 15 that defines the upper limit position of the end portion of the leaf spring 8 is disposed to be spaced upward from the flat surface portion 11 a of the base portion 11, and both end portions are the left and right side wall portions 13, 14. The upper half portions 13b and 14b are joined at positions near the upper ends. In the stopper brackets 10 </ b> L and 10 </ b> R in the dead axle 2, the position of the rebound stopper pin 15 is slightly eccentric to the rear side with respect to the position immediately above the axis of the dead axle 2.

  The stopper brackets 10L and 10R configured as described above are erected on the axle case 3 so as to straddle the upper half of the cross section of the axle case 3, and in that state, are joined to the axle case 3 by welding. Yes. That is, the concave portions 13c and 14c of the left and right side wall portions 13 and 14 are fitted in the upper half of the cross section of the axle case 3, and in this state, the peripheral portions 13c1 and 14c1 of the concave portions 13c and 14c and the outer periphery of the axle case 3 The face and the fillet are welded. Further, the axle case 3 is sandwiched between the pair of hanging portions 11b of the base portion 11, and in this state, the bottom edge 11b2 of the pair of hanging portions 11b and the outer side surface in the front-rear direction of the axle case 3 are filleted. Welded. Accordingly, the stopper brackets 10L and 10R are firmly fixed to the upper half of the axle case 3.

  By being fixed in this way, as shown in FIG. 7, the flat surface portion 11 a of the base portion 11 is disposed at a position spaced apart from the upper surface of the axle case 3 by a distance H.

  In addition, as shown in FIGS. 1, 4, and 5, at the upper end portion of one side wall portion 14 of the pair of side wall portions 13, 14, the bent portion is bent obliquely so as to approach the other side wall 13. 14b1 is provided. The side wall portion 14 provided with the bent portion 14b1 is the side wall portion closer to the vehicle body frame 1, that is, the side wall portion closer to the central portion in the left-right direction of the axle case 3, and thus the bent portion 14b1 is provided. Therefore, it is advantageous for securing a space on the body frame 1 side.

  According to the stopper brackets 10L and 10R having the above-described configuration, the following operational effects can be obtained.

  First, instead of the wear pad, the bead build-up portion 12 is provided on the upper surface of the flat portion 11a of the base portion 11. Therefore, when the bead build-up portion 12 is worn, the bead build-up portion 12 is regenerated by welding. By simply doing, the worn part can be easily refilled. Therefore, compared with the case where the wear pad is replaced, parts replacement is unnecessary, and the work can be simplified. In addition, unlike the case where the wear pad is attached, a space for fastening the bolt is unnecessary, so that the space can be effectively used.

  Moreover, since the base part 11 and the side wall parts 13 and 14 are formed with a plate (sheet metal), a manufacturing cost can be reduced compared with the case where it is formed with a casting. In addition, when it is formed from a casting, the thickness tends to be large. However, by using a sheet metal, unnecessary thickness can be reduced, and weight saving and space saving can be achieved. In particular, when the V rod 4 is used, the stopper brackets 10L, 10R are not subjected to the load in the left-right direction or the front-rear direction, so that the thickness of the side wall portion 12 can be reduced, thereby saving the space in the left-right direction. The place that contributes to the increase.

  Further, since the flat portion 11a on which the leaf spring 8 is placed floats upward from the axle case 3, the height position on which the end portion of the leaf spring 8 is placed can be freely set regardless of the thickness of the sheet metal used for the base portion 11. Can be set to

  In addition, since the upper half of the cross section of the axle case 3 is sandwiched between the leg portions 13a1 and 14a1 of the side wall portions 13 and 14, the welding length between the side wall portions 13 and 14 and the axle case 3 is saved while saving space. To increase the bonding strength.

  In addition, since the bent portion 14b1 is provided at the upper end portion of the side wall portion 14 closer to the vehicle body frame 1, a space between the vehicle body frame 1 can be increased. In addition, since the bent portion 14b1 only needs to add one bending process to the sheet metal, there is almost no increase in processing cost.

  In the embodiment described above, the stopper brackets 10L and 10R on the dead axle 2 side have been described. However, the same configuration can be adopted for the stopper bracket on the drive axle side, and similar operational effects can be obtained.

  8 is a view of a drive axle case provided with a stopper bracket according to another embodiment as viewed from the rear, FIG. 9 is a view of the drive axle case as viewed from above, and FIG. 10 is a perspective view of the stopper bracket according to the present embodiment. is there.

  As shown in FIGS. 8 and 9, a suspension bracket 105 is fixed to the upper surface of the bulging portion 102 a of the axle case 103 that is the main body of the drive axle 102. A brake chamber bracket 106 is fixed to the rear surfaces of the left and right sides of the bulging portion 102a. Further, stopper brackets 110L and 110R are joined to the upper surface of the axle case 103 at the end in the left and right direction with respect to the brake chamber bracket 106.

  These stopper brackets 110L and 110R have substantially the same structure as the stopper brackets 10L and 10R on the dead axle 2 side. However, in the stopper brackets 10L and 10R on the dead axle 2 side, the position of the rebound stopper pin 15 is slightly eccentric to the rear side with respect to the position directly above the axis of the dead axle 2, but in this embodiment, FIG. As shown in FIG. 10, the position of the rebound stopper pin 15 of the stopper brackets 110 </ b> L and 110 </ b> R on the drive axle 102 side is not eccentric, and is set immediately above the axis of the drive axle 102. About others, it is the completely same structure as the dead axle 2 side, and there can exist an effect completely the same as the stopper brackets 10L and 10R on the dead axle 2 side.

  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 Dead axle 3 Axle case 4 V rod 5 Suspension bracket 6 Brake chamber bracket 7 Brake chamber 8 Leaf spring 10L, 10R Stopper bracket 11 Base part 11a Plane part 11a1 Left right edge 11b Hanging part 11b1 Left right edge 11b2 Bottom edge 12 bead build-up part 13 side wall part 13a lower half part 13a1 leg part 13b upper half part 13c recessed part 13c1 peripheral part 14 side wall part 14a lower half part 14a1 leg part 14b upper half part 14b1 bent part 14c recessed part 14c1 peripheral part 15 rebound stopper pin (Ceiling member)
102 Drive axle 103 Axle case 105 Suspension bracket 106 Brake chamber bracket 110L, 110R Stopper bracket

Claims (4)

A suspension mechanism that connects the axle and the vehicle body frame is configured, and the spring end of the leaf spring extending in the longitudinal direction of the vehicle is supported on the axle case extending in the axle direction, thereby restricting the vertical movement of the leaf spring. A stopper bracket,
A base part having a flat part fixedly arranged on the axle case, and a base part on which the spring end part can be placed on the flat part;
A bead overlay formed on the upper surface of the flat portion of the base portion so as to be in contact with the lower surface of the spring end portion placed on the flat portion;
With stopper bracket. The sheet metal constituting the base portion is bent in a U-shape so as to include the plane portion and a pair of hanging portions hanging from both sides thereof,
The flat portion is disposed at a position spaced upward from the axle case, and the hanging portion is disposed at both positions of the axle case along the vehicle longitudinal direction, and the hanging portion is the axle. Welded to the case,
The stopper bracket according to claim 1. Side walls are further disposed at positions on both sides in the axle direction with respect to the base,
The side wall portion is composed of a pair of metal plates that are spaced apart from and parallel to each other in the axle direction and are erected on the axle case.
A U-shaped edge portion of the sheet metal constituting the base portion is welded to each facing surface of the pair of sheet metals constituting the side wall portion,
The stopper bracket according to claim 2. A ceiling member that is spaced apart upward from the planar portion of the base portion and defines an upper limit position of the spring end portion;
The pair of sheet metals constituting the side wall portions extend upward with respect to the planar portion of the base portion so as to respectively support both end portions of the ceiling member in the axle direction.
The upper end portion of the sheet metal closer to the body frame of the pair of sheet metals has a bent shape tilted in a direction away from the body frame,
The stopper bracket according to claim 3.

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