JPH0623443Y2 - Wheel suspension for heavy goods vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a wheel suspension device for a large-sized vehicle that supports a wheel so that the wheel can be vertically swung via a swing arm.

[Conventional technology]

For example, in a large-sized vehicle as disclosed in Japanese Patent Publication No. 51-20782, a large number of wheels are interlocked with each other so that they can be steered in a lower portion of a loading platform, and a hydraulic motor is provided on a main wheel to drive the wheels. To run.

Each of the wheels is pivotally mounted on a bracket provided on the vehicle body so as to be capable of turning by 90 ° or more, and the base of the swing arm is pivotally mounted so as to be swingable in the vertical direction of the vehicle body, and is supported by an axle case supported by the swing arm. , Is driven by a hydraulic motor provided in the axle case.

[Problems to be solved by the invention]

However, in the case of the above structure, the piping to the hydraulic motor must be arranged so as to sufficiently follow the movement of the wheels because the wheels turn and swing up and down. It is necessary to prevent damage.

Therefore, an object of the present invention is to provide a wheel suspension device for a large-sized vehicle, which has a pipe for a hydraulic motor that sufficiently follows the movement of the wheel and is less likely to be damaged.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a wheel suspension system for a large-sized transport vehicle in which a traveling wheel is supported by a swing arm pivotally attached to a bracket provided on the lower part of a vehicle body so as to be capable of turning over 90 °. The swing arm includes a base end portion pivotally attached to the bracket, an arm portion that extends from the base end portion and is provided with an axle case for supporting wheels on both sides, and a driving end formed at a tip end of the arm portion. It is characterized in that it has a hydraulic motor mounting portion and a flange portion that projects to both sides of the lower edge of the arm portion and that protects piping to the hydraulic motor that is arranged along both sides of the arm portion.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 13.

The large object transportation vehicle 1 has a driver's cab 3 and a plurality of traveling wheels 4 below a vehicle body 2, and the traveling wheels 4 can be interlocked to steer. When carrying a large heavy object 5, two or more vehicles are connected and travel.

The traveling wheels 4 are steering devices 6 provided at the bottom of the vehicle body 2.
The suspension bracket 7 that can swivel by 90 ° or more, a swing arm 9 that is vertically swingably supported by an arm 8 of the suspension bracket 7, an axle case 10 formed integrally with the swing arm 9, and an axle case. Wheels 1 rotatably supported at both ends of 10
1, 11 and a cylinder 12 for supporting the swing arm 9
The hydraulic motor 13 provided on the swing arm 9 drives the wheels 11, 11 to travel.

The steering device 6 includes racks 15 and 1 that mesh with a pinion 14 provided at the center of rotation of the suspension bracket 7.
6 and a cylinder 1 for moving the racks 15 and 16
7 and 18, the racks 15 and 16 are moved according to the steering in the operator cab 3, and the pinion 14 is rotated to rotate the traveling wheels 4.

The swing arm 9 includes a base portion 9a pivotally attached to the lower end of the arm 8 of the suspension bracket 7 so as to be vertically swingable,
An arm portion 9b extending from the base portion 9a is formed, and flanges 9c and 9d for mounting the axle cases 10a and 10b are formed on both sides of the arm portion 9b.
A mounting portion 9e for mounting the rod 12a of the cylinder 12 is provided substantially in the middle of the cylinders 9c, 9d, a mounting portion 9f for the hydraulic motor 13 is provided at the tip of the arm portion 9b, and an opening 9 for inspection is provided below the mounting portion 9f.
g, respectively, and the lower edges of the arms 9b are projected to the left and right, respectively, and protective flanges for the drive hoses 19a, 19b and the control hoses 20a, 20b of the hydraulic motor 13 arranged along both sides of the arm portion 9b. 9h and 9i are formed.

Drive hoses 19a, 19b and control hoses 20a,
20b is provided along both sides of the arm portion 9b of the swing arm 9, and is supported by a support pin 21 of the rod 12a of the cylinder 12 pivotally mounted on a mounting portion 9e provided on the arm portion 9b.
It is held on both sides of the arm 9b by the detent stoppers 22 and 22.

In addition, the inspection opening 9 formed at the tip of the arm 9b.
A lid 23 is provided on the g, and the arm portion 9b is attached to the lid 23.
A level confirmation plug 24 for the oil to be filled therein and a drain port 25 are attached, and a cover 26 is provided on the hydraulic motor attachment portion 9f to cover the hydraulic motor 13 and the opening 9e from the lateral side downward. And the driving hose 1
9 a, 19 b and control hoses 20 a, 20 b are also protected by this cover 26.

Next, a drive device for the large-sized carrier 1 will be described.

As shown in FIG. 11, the traveling wheel 4 has a case 10a, 10b attached to both sides of an arm portion 9b of a swing arm 9 to form an axle case 10, and bearings 27, 27 are provided at both ends of the axle case 10, respectively. The hubs 28 and 28 are rotatably supported via the wheels 28 and 28, and the wheels 11 and 11 formed of double tires are attached to the hubs 28 and 28 with bolts 29.

Mounting part 9 formed on arm part 9b of swing arm 9
A hydraulic motor 13 is attached to g at a right angle to the axial direction of both wheels 11, 11, and the bevel pinion 3 is attached to the drive shaft 13a of the hydraulic motor 13 projecting into the arm portion 9b.
0 is spline-fitted, and the flange 9 of the arm 9b is
The bevel pinion 3 is attached to a bevel gear 33 that is integrally rotatably fixed to a case 32a of a differential gear mechanism 32 that is rotatably supported by brackets 31 and 31 provided on c and 9d.
0 meshes.

First stage planetary gear reduction devices 34, 34 are arranged on both sides of the brackets 31, 31, respectively, and second stage planetary gear reduction devices 35, 35 are arranged on both sides thereof.

The sun gear 34a of the first stage planetary gear speed reducer 34, 34,
34a denotes the left and right output shafts 32 of the differential gear mechanism 32.
connected to b and 32c with loose splines,
The internal gears 34b and 34b are coupled to the brackets 31 and 31 in a coupling manner, respectively, and
The carrier 34d of the planet gear 34c that meshes with the a and the internal gear 34b is the second stage planetary gear speed reducer 3
No. 5 sun gear 35a is splined.

Internal gear 35b of the second stage planetary gear speed reducer 35
Is bolt 3 together with case 10a or case 10b.
The carrier 35d of the planet gear 35c which is fixed to the arm portion 9b of the swing arm 9 at 6 and meshes with the sun gear 35a and the internal gear 35b is spline-coupled to the output shaft 37 penetrating the inside of the axle case 10.

The output shaft 37 protruding from the axle case 10 is coupled to the hub 28 in a coupling shape.

As a result, the rotation of the hydraulic motor 13 is decelerated in the first stage by the bevel pinion 30 and the bevel gear 33, and
-Stage planetary gear reduction device 34 and second-stage planetary gear reduction device 3
In step 5, the wheels are decelerated by the second and third stages, respectively.
Be transmitted to.

With this configuration, the drive hoses 19a and 19b of the hydraulic motor 13 and the control hoses 20a and 20b
It is possible to provide a piping structure in which b is sufficiently followed by the movement of the traveling wheels 4 and there is little risk of damage due to flying stones during traveling. Further, since the oil level confirmation plug 24 and the drain port 25 are attached to the lid 23 to which the opening 9g of the swing arm 9 is attached, the number of processing steps can be reduced, and further,
Bevel pinion 30 provided on drive shaft 13a of hydraulic motor 13 from opening 9g and bevel gear 3 of differential gear mechanism 32
The tooth contact of 3 can be easily checked.

The large-sized transport vehicle 1 having a large number of traveling wheels 4 configured in this manner can operate the traveling wheels 4 in an interlocking manner by operating in the cab, and operates the cylinders 12 of the traveling wheels 4 in an interlocking manner. The vehicle height can be changed.

For this reason, as shown in FIG. 12 (a), straight and straight-ahead turns, lateral movements as shown in (b), in-situ turns as shown in (c), and (d) The movement from the lateral direction to the oblique direction as shown, the movement from the straight traveling direction to the oblique direction as shown in (e), and the like are possible. Therefore, it is configured as a vehicle having a long running ability even though it is a long vehicle.
As shown in (b), the vehicle height is lowered to enter under the pallet 38 on which the heavy load 5 is placed, and as shown in (b), the vehicle height is increased to load and load the heavy load. , Lower the vehicle height as shown in (c) and ground the legs of the pallet 38,
As shown in (d), the pallet 38 with the vehicle height lowered
Leave from.

[Effect of device]

As described above, the present invention relates to a wheel suspension device for a large-sized transport vehicle in which a traveling wheel is supported by a swing arm pivotally attached to a bracket provided on the lower part of a vehicle body so as to be able to turn by 90 ° or more, and The swing arm includes a base end portion pivotally attached to the bracket, an arm portion that extends from the base end portion and is provided with an axle case for supporting wheels on both sides, and a driving hydraulic pressure formed at a tip end of the arm portion. Since it has a motor mounting portion and a flange portion that projects to both sides of the lower edge of the arm portion and protects the piping to the hydraulic motor that is arranged along both sides of the arm portion, it sufficiently follows the movement of the wheels, and
It is possible to provide a piping structure for a hydraulic motor that is less likely to be damaged by flying stones during traveling.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of a large truck, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view of traveling wheels. The figure is a front view, FIG. 6 is a rear view, and FIGS. 7 and 8 are plan views showing a turning state of wheels.
9 is a perspective view of a swing arm, FIG. 10 is a sectional view taken along line XX of FIG. 4, FIG. 11 is a sectional view of a driving device, and FIG.
(a) to (e) are plan views illustrating the turning performance of a large-sized carrier,
FIGS. 13 (a) to 13 (d) are side views showing the loading and unloading sequence of luggage. 1 ... Large transport vehicle, 2 ... Body, 3 ... Operating room, 4 ...
Traveling wheels, 6 ... turning mechanism, 7 ... suspension bracket, 8 ... arm, 9 ... swing arm, 9a ...
... Base part, 9b ... Arm part, 9f ... Driving hydraulic motor mounting part, 9g ... Inspection opening, 9h, 9i ... Flange, 10 ... Axle case, 11 ... Wheel, 12 ...
Cylinder, 13 ... Hydraulic motor, 19a, 19b ... Drive hose, 20a, 20b ... Control hose, 30 ...
... bevel pinion, 33 ... bevel gear

Claims (2)

[Scope of utility model registration request] 1. A wheel suspension system for a large-sized transport vehicle in which a traveling wheel is supported by a swing arm which is pivotally mounted so as to be vertically swingable on a bracket provided on the lower part of a vehicle body so as to be able to rotate by 90 ° or more. A base end portion pivotally attached to the bracket, an arm portion extending from the base end portion and provided with axle cases for supporting wheels on both sides, and a drive hydraulic motor mounting portion formed at a tip end of the arm portion A wheel suspension device for a large-sized vehicle, comprising: a flange portion that protrudes to both sides of a lower edge of the arm portion and that protects piping to the hydraulic motor, which is arranged along both sides of the arm portion. 2. The utility model registration claim, wherein the swing arm has an opening below the hydraulic motor mounting portion for inspecting a wheel drive device meshing with a drive shaft of the hydraulic motor. A wheel suspension system for a large-sized transport vehicle according to item 1.