WO2019207986A1

WO2019207986A1 - Vehicle

Info

Publication number: WO2019207986A1
Application number: PCT/JP2019/009843
Authority: WO
Inventors: 誠司笹野; 武道大照
Original assignee: ダイムラー・アクチェンゲゼルシャフト
Priority date: 2018-04-27
Filing date: 2019-03-12
Publication date: 2019-10-31
Also published as: JP2019189170A

Abstract

[Problem] To provide a vehicle in which a stopper of a helper spring and a stabilizer bracket are integrated to form an integrated part. [Solution] An integrated part 41 comprises a bracket 26 which mounts a stopper 25b of a helper leaf spring 17 on a frame 1 of a vehicle, and a stabilizer bracket 30d which mounts a stabilizer 30 on the frame 1.

Description

vehicle

The present invention relates to a vehicle equipped with a two-stage characteristic leaf spring and a stabilizer.

Vehicles such as trucks are equipped with leaf springs to reduce vibration. In addition to the main leaf spring, a leaf spring called a two-stage characteristic leaf spring having a helper leaf spring may be used as the leaf spring. The two-stage characteristic leaf spring is attached so that the end of the helper leaf spring abuts on a stopper provided on the frame of the vehicle and functions as a spring when the weight on the vehicle exceeds a predetermined value (Patent Document). 1 etc.)

車両 Stabilizers may be provided on vehicles that use these two-stage characteristic leaf springs in order to suppress rolls during vehicle turning.

JP-A-6-179377

In many vehicles including such a two-stage characteristic leaf spring and stabilizer, a stopper of a helper leaf spring and a stabilizer bracket for attaching the stabilizer to the vehicle are attached to the vehicle frame side by side in the vehicle front-rear direction.
By the way, in vehicles, cost reduction and simplification of layout are required.
However, in a vehicle including a two-stage characteristic leaf spring and a stabilizer, such a concept does not reach a stopper of a helper leaf spring or a stabilizer bracket.

Therefore, an object of the present invention is to provide a vehicle in which a stopper of a helper leaf spring and a stabilizer bracket are integrated to form an integrated part.

The present invention can be realized as the following application examples.
The vehicle according to this application example is provided with a frame provided in the vehicle, a main leaf spring provided in the vehicle, a helper leaf spring provided in the vehicle, a stopper attached to the frame and in contact with the helper leaf spring, and the vehicle. In a vehicle provided with a stabilizer and a stabilizer bracket for attaching the stabilizer to the frame, the bracket for attaching the stopper to the frame and the stabilizer bracket are configured by an integrated part.

With this configuration, the helper leaf spring stopper bracket and stabilizer bracket, which were independent of each other, are integrated into one component, so that the cost is low. Moreover, the layout of the stopper brackets and stabilizer brackets is simplified, and the work efficiency of assembling the parts to the vehicle frame is improved.

Therefore, the cost of the helper leaf spring stopper and the stabilizer bracket can be reduced, the layout can be simplified, and the work efficiency can be improved.

Further, in the vehicle according to this application example, the integrated component may be configured such that the stopper bracket and the stabilizer bracket are configured as separate components, and the components are integrated.
In such a configuration, since it is sufficient to combine components that are easy to manufacture, it is easy to manufacture the integrated components.

In the vehicle according to this application example, the integrated component may be provided at a position that supports the terminal of the helper leaf spring and the stabilizer link of the stabilizer substantially vertically.
Such a configuration can satisfactorily achieve both the performance of exhibiting the helper leaf spring and the performance of suppressing the roll by the stabilizer.

The vehicle according to this application example may include a dodion type axle.
In such a configuration, not only the unsprung load of the vehicle can be suppressed by using the axle, but also the integrated component can be attached to a position suitable for both the stopper and the stabilizer by using the arrangement of the axle.

The perspective view which shows each part of a vehicle provided with the two-stage characteristic leaf spring, a dodion-type axle, and a stabilizer used as the vehicle which concerns on one Embodiment of this invention. The perspective view which expands and shows the integrated component in which the stopper of the helper leaf spring in FIG. 1 and the stabilizer bracket were integrated. FIG. 3 is a cross-sectional view of an integrated part along the direction of arrow AA in FIG. 2. The disassembled perspective view which shows the integrated component decomposed | disassembled.

Hereinafter, the present invention will be described based on an embodiment shown in FIGS.
FIG. 1 shows the rear side of a vehicle, for example, the rear side of an electric truck.
First, each part on the rear side of the vehicle will be described. Reference numeral 1 in FIG. 1 indicates a frame configured by combining a plurality of cross members 2b with a pair of

side rails

2a, and 3 indicates between the side rails 2a and 2a. 5 shows a pair of wheels (only one side is shown by a two-dot chain line) arranged on both sides of the frame 1 in the vehicle width direction.

The electric drive unit 3 includes a motor that is a driving drive source of the vehicle, a speed reducer connected to the motor, and a differential (all not shown) connected to the speed reducer. Of course, a pair of drive shafts 7 (only part of which are shown in FIG. 1) extend from the differential to both sides in the vehicle width direction.

The front end side of each drive shaft 7 is supported by a pair of two-stage characteristic leaf springs 9 provided on the

side rails

2a and 2a and a dodion type axle 11 provided between the

side rails

2a and 2a ( Suspended). And the front-end | tip part of the drive shaft 7 is connected to the wheel 5 via a spindle or a hub (both not shown).

The suspension structure will be described in detail. A pair of square cylindrical saddles 13 constituting a dodion type axle 11 are arranged on both sides of the frame 1 in the vehicle width direction. Using the saddle 13 as a pedestal, a two-stage characteristic leaf spring 9 is assembled to the top of the saddle 13.

Since the two-stage characteristic leaf spring 9 has the same structure on both sides in the vehicle width direction, the two-stage characteristic leaf spring 9 on one side will be described here.
That is, the two-stage characteristic leaf spring 9 has a main leaf spring 15 extending in the vehicle front-rear direction superimposed on an upper portion of the square cylindrical saddle 13, and a helper leaf spring 17 also extending in the vehicle front-rear direction on the main leaf spring 15. And the center portions in the longitudinal direction of both the main leaf springs 15 and the helper leaf springs 17 are fastened to the saddle 13 by using U-bolts 19 and fittings 20 as fasteners.

Specifically, each of the main leaf spring 15 and the helper leaf spring 17 is configured by laminating a plurality of leaf spring pieces extending in the vehicle front-rear direction. Incidentally, the helper leaf spring 17 is set to have a shorter overall length than the main leaf spring 15 and changes the spring constant of both. Of course, the main leaf spring 15 is set to a spring constant suitable for emptying.

Among these, the front end portion (one end portion) of the main leaf spring 15 is rotatably supported by a main leaf bracket 21a provided on the side rail 2a via an annular support portion 15a. The rear end portion (the other end portion) is rotatably supported by a main leaf bracket 21b provided on the side rail 2a via a shackle link 23, and the main leaf spring 15 can be elastically displaced in the vertical direction. I support it.

The helper leaf spring 17 includes a pair of

stoppers

25 a and 25 b that can come into contact with the end of the spring 17. These

stoppers

25 a and 25 b are provided on the side surface of the side rail 2 a, specifically on the side surface corresponding to the end of the helper leaf spring 17.

More specifically, the

stoppers

25a and 25b are provided at positions away from the end of the helper leaf spring 17 by a predetermined distance. That is, each terminal of the helper leaf spring 17 has a structure that comes into contact with the

stoppers

25a and 25b when the vehicle-mounted weight becomes a predetermined weight or more. Thus, when the vehicle is empty, only the main leaf spring 15 functions, and when the vehicle is loaded, the end of the helper leaf spring 17 comes into contact with the

stoppers

25a and 25b, and the helper leaf spring 17 also functions as a spring. The spring constant is suitable for loading.

Further, the front end side of the drive shaft 7 extending from the differential is inserted into the saddle 13. And the front end side of this drive shaft 7 is rotatably supported by the saddle 13, and the vehicle is suspended.

Further, the dodion type axle 11 includes a cylindrical axle pipe 11a arranged in a U shape on the rear side of the electric drive unit 3 so as to avoid the rear portion of the electric drive unit 3.

The both ends of the U-shaped axle pipe 11a are connected to saddles 13 on both sides in the vehicle width direction, and each wheel 5 is suspended like a torsion beam to suppress the unsprung load. Incidentally, although not shown, the axle pipe 11a is supported by the side rail 2a via a shock absorber.

On the other hand, a stabilizer 30 is provided between the

side rails

2a, 2a to suppress the roll of the vehicle. The stabilizer 30 includes a main bar portion 30a disposed between the side rails 2a and 2 along the vehicle width direction, a pair of side bar portions 30b extending from both ends of the main bar portion 30a in the vehicle front-rear direction, and the main bar portion 30a. A pair of stabilizer links 30c that support both ends of the stabilizer, and a stabilizer bracket 30d that fixes the upper ends of the stabilizer links 30c to the

side rails

2a and 2a, respectively.

Specifically, the main bar portion 30a is disposed behind the axle pipe 11a so as not to interfere with the axle pipe 11a, and the side bar portion 30b is also disposed on the outer side in the vehicle width direction. And the fixed seat 30e provided in the edge part of each side bar part 30b is fixed to the lower part of each saddle 13. As shown in FIG. The upper end of each stabilizer link 30c has an annular support portion 30f. And the support part 30f is supported by the stabilizer bracket 30d installed in the side rail 2a, and has the structure where the roll at the time of vehicle turning is suppressed using the torsion of the main bar part 30a. Incidentally, the stabilizer 30 of this embodiment uses the stabilizer component in the base vehicle not equipped with the dodion type axle 11 as it is.

A structure in which the stabilizer brackets 30d constituting the stabilizer 30 and the stopper 25b on the rear side of the two-stage characteristic leaf spring 9 are integrated with each other is used. For this integration, an integrated component 41 is used in which a stabilizer bracket 30d, which will be described later, and a bracket 26 for attaching the stopper 25b to the side rail 2a are integrated.

By the way, when integrating the bracket 26 of the stopper 25b and the stabilizer bracket 30d, it is desirable that the functionality of the helper leaf spring 17 and the posture of the stabilizer link 30c are good.

Therefore, the integrated part 41 is provided at a position that supports the end of the helper leaf spring 17 and the stabilizer link 30c substantially vertically.

Here, it is conceivable that a vehicle using the dodion-type axle 11 uses the stabilizer 30 of the base vehicle that does not use the axle 11. However, when the dodion-type axle 11 is used as it is, the stabilizer 30 is used. There is a risk of interference with the axle pipe 11a. For this reason, when diverting the stabilizer 30 of a base vehicle, the position of the fixed seat 30e which makes the attachment position of the stabilizer 30 is shifted to the vehicle rear, and interference with the axle pipe 11a is avoided.
In addition, the dodion type axle 11 may be provided with a hole for drainage, and in order to avoid this hole, the position of the fixing seat 30e forming the mounting position of the stabilizer 30 may be shifted to the rear of the vehicle. .

In the present embodiment, the stabilizer link 30c is properly supported while properly positioning the integrated component 41, the end of the helper leaf spring 17 and the stabilizer link 30c, and ensuring the functionality of the helper leaf spring 17. I am doing so.

Next, the integrated component 41 will be described.
FIG. 2 shows an enlarged integrated part 41. 3 shows a cross section of the integrated part 41 along the line AA in FIG. 2, and FIG. 4 shows the disassembled integrated part 41.

The integrated part 41 has a structure in which the bracket 26 of the stopper 25b and the stabilizer bracket 30d of the stabilizer 30 are formed as separate parts, and these parts are integrated.

Specifically, the stabilizer bracket 30d is a component configured by combining steel plates, and a combination of a band-shaped base plate portion 43 extending in the vertical direction and a support piece portion 45 attached to the lower portion of the base plate portion 43. Composed.
Specifically, the base plate portion 43 is a portion disposed on the side surface of the side rail 2a, and a pair of parallel guide walls 47 projecting outward in the vehicle width direction is formed on both upper sides of the base plate portion 43. ing. Moreover, the lower part arrange | positioned under the side rail 2a among the base board parts 43 has the L-shaped support part 49 projected to the vehicle width direction inner side.

On the other hand, the support piece 45 includes a fixed seat 51 arranged on the outer side in the vehicle width direction of the base plate portion 43, and a support portion 53 that protrudes slightly inward in the vehicle width direction from the lower end of the fixed seat 51. Have. The fixed seat 51 of the support piece 45 is joined (for example, welded) to the base plate portion 43, and the support portion 49 and the support portion 53 are spaced apart from each other at the lower end of the base plate portion 43. A bifurcated portion 55 that supports the support portion 30f at the end of the stabilizer link 30c is formed from the opposing

support portions

49 and 53. That is, a component for the stabilizer bracket is configured.

On the other hand, the bracket 26 of the stopper 25b includes a joint seat 59 disposed on the base plate portion 43 surrounded by the pair of guide walls 47, and a mounting seat 61 projecting in an L shape outward from the lower end of the joint seat 59 in the vehicle width direction. And a pair of parallel side walls 63 projecting upward from both sides of the mounting seat 61. Incidentally, the bracket 26 is made of a steel plate. Then, an elastic member 65 such as a rubber body that receives the end of the helper leaf spring 17 is bolted to the lower surface of the mounting seat 61 (the nut is not shown) (FIG. 2). That is, a stopper component is configured.

The bracket 26 has a joint wall 59 superimposed on the upper stage of the base plate portion 43 with the guide wall 47 as a guide. Further, the joint seat 59 and the side wall 63 are joined (for example, welded) to the base plate portion 43 and the guide wall 47, and the stabilizer bracket part and the stopper part are integrated. That is, the integrated component 41 is configured by integrating different components.

The integrated part 41 configured in this way is attached to the frame 1 by bolting each part of the base plate part 43 to the side surface of the side rail 2a together with other parts (nuts are not shown). By this attachment, the elastic member 65 assembled to the integrated component 41 is disposed immediately above the end of the helper leaf spring 17. Moreover, the forked part 55 is arrange | positioned by the attachment of the integrated component 41 in the position which supports the stabilizer link 30c substantially perpendicularly. That is, the integrated component 41 is attached to a position that supports the end of the helper leaf spring 17 and the stabilizer link 30c substantially vertically.

The support portion 30f at the end of the stabilizer link 30c is rotatably supported by the bifurcated portion 55 of the integrated component 41, and both the helper leaf spring 17 and the stabilizer 30 are appropriately assembled using the integrated component 41. .

As described above, in the vehicle according to the present embodiment, the bracket 26 of the stopper 25b (helper leaf spring 17) and the stabilizer bracket 30d of the stabilizer 30 which are independent from each other are integrated into one integrated part 41. The cost spent on 26 and 30d is low. In addition, since the layout of the bracket 26 of the stopper 25b and the stabilizer bracket 30d of the stabilizer 30 is also simplified, it is possible to improve the working efficiency of assembling the components to the frame 1 of the vehicle.

Therefore, the cost of the stopper 25b and the stabilizer bracket 30d can be reduced, the layout can be simplified, and the work efficiency can be improved.

In addition, the integrated part 41 can be constructed by combining easy-to-manufacture parts, ie, a stopper part and a stabilizer part, so that the integrated part 41 can be easily manufactured.

In addition, since the integrated component 41 is provided at a position that supports the end of the helper leaf spring 17 and the stabilizer link 30c of the stabilizer 30 substantially vertically, the ability to exert the helper leaf spring 17 and the ability to suppress the roll. Both can be satisfactorily achieved.

In addition, since the integrated component 41 is applied to a vehicle having the dodion type axle 11, not only the unsprung load of the vehicle can be suppressed, but also the integrated component 41 is stopped by using the arrangement of the axle 11. 25b and the stabilizer 30 can be easily attached at suitable positions.

It should be noted that the present invention is not limited to the above-described embodiment, and may be implemented in various ways without departing from the spirit of the present invention. For example, the integrated component 41 may have a structure in which a reinforcing member 71 as shown by a two-dot chain line in FIG. 2 is added. In one embodiment, the present invention is applied to a vehicle equipped with the electric drive unit 3 and the dodion type axle 11. However, the present invention is not limited thereto, and the vehicle is not equipped with the electric drive unit 3 or the dodion type axle 11. The present invention may be applied to.

1 Frame 11 Dodion type axle 15 Main leaf spring 17 Helper leaf spring 25b Stopper 26, 30d Stopper bracket, stabilizer bracket (separate parts)
30 Stabilizer 30c Stabilizer Link 41 Integrated Parts

Claims

A frame provided in the vehicle;
A main leaf spring provided in the vehicle;
A helper leaf spring provided in the vehicle;
A stopper attached to the frame and in contact with the helper leaf spring;
A stabilizer provided in the vehicle;
A stabilizer bracket for attaching the stabilizer to the frame;
In vehicles equipped with
The bracket for attaching the stopper to the frame and the stabilizer bracket are constituted by an integrated part.
The vehicle according to claim 1, wherein the integrated part is configured such that the bracket of the stopper and the stabilizer bracket are made of different parts, and these parts are integrated.
The stabilizer has a stabilizer link supported by the stabilizer bracket,
The vehicle according to claim 1, wherein the integrated part is provided at a position that supports a terminal of the helper leaf spring and a stabilizer link of the stabilizer substantially vertically.
The vehicle according to any one of claims 1 to 3, further comprising a dodion type axle.