JPS6283206A - Lifting gear for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a large self-propelled cart for transporting legged pallets on which heavy objects are placed in factory premises, etc. The present invention relates to a vehicle lifting device that lifts and lowers a vehicle frame having two driven drive shafts to perform cargo handling.

[Prior Art] Large self-propelled carts are used in steel mills, shipyards, etc., where it is necessary to transport heavy objects weighing several tens of tons.

7 to 9 show the configuration of this type of large self-propelled truck. In the figure, ■ is a surface steering wheel, 2 is a rear steering wheel, and 3 and 4 are biaxial driving wheels. The traveling drive shaft 4 is driven by an intermediate movable propulsion shaft 7. That is, the front drive shaft assembly (front axle assembly) supported by the drive wheels 3
A front swivel propulsion shaft 6 is interposed between the transmission 5 and the rear drive shaft assembly 9 supported by the drive wheels 4 and the front drive shaft assembly. An intermediate movable propulsion shaft 7 is interposed between the movable shaft 6.8 and the movable propulsion shaft 6.7, and power is transmitted by these movable propulsion shafts 6.7. Here, both ends of the universal propulsion shaft 6.7 are connected by a universal joint. In addition, the front traveling drive shaft assembly 8 and the rear traveling drive shaft assembly 9 are
This is a drive shaft device with a reduction differential device.

A frame (underframe) 10 serving as a loading platform is supported above the steering wheels 1, 2 and the driving wheels 3.4 so as to be movable up and down. A power source and a driver's cab are also attached to this frame 10.

Next, the configuration of the above-mentioned lifting device will be explained. Traveling drive shaft 3.
4 and the lower part of the frame 10, arc-shaped mounting members 1'l and 12 are fixed, and mounting members 11 and 12 are fixed.
A lever 13.14 on the rift is attached to the lower end of the lever 13.14 so as to be vertically rotatable about a center pin 15.16. Further, the other ends of the lift levers 13 and 14 are respectively fixed to the front traveling drive shaft assembly 8 and the rear traveling drive shaft assembly 9, and are integrated with these. Furthermore, a lifting hydraulic cylinder 17.18 is interposed between the central portion of the lift levers 13, 14 and the upper end of the mounting member 11.12.

In such a configuration, when the cylinders 17 and 18 are extended after moving backward from the lowered position shown in FIG. 8 and positioning the frame 10 under the pallet with legs, the frame 10 moves from the lowered position shown in FIG. It rises to the raised position shown in Figure 9 (7) and lifts the pallet with legs for cargo handling.

[Problems to be solved by the invention] By the way, in the above-mentioned conventional vehicle elevating device,
Since the front traveling drive shaft assembly 8 and the rear traveling drive shaft assembly 9 are integrated with the lift lever 13.14, the bending angle of the front free propulsion shaft 6° and the middle free propulsion shaft 7 is as shown in FIG. There was a problem in that the lowered position of 1 and the raised position of Fig. 9 were significantly different, exceeding the permissible limits of the front swivel propulsion shaft 6 and the middle swivel propulsion shaft 7, making it impossible to achieve the required lift amount. .

The present invention was made against this background, and an object of the present invention is to provide a vehicle lifting device that can achieve a sufficient lift amount within the allowable range of a universal propulsion shaft.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a vehicle for carrying out cargo handling by lifting and lowering the frame of the vehicle, which has a two-sided traveling drive shaft that is rotatably driven by a universal propulsion shaft. In the elevating device, each pair of four-joint mechanisms attaches the frame to each of the travel drive shafts, a first link of each four-joint mechanism is fixed to a lower part of the frame in the vertical direction, and the first link A second link opposite to the link includes four four-bar mechanisms fixed to the traveling drive shaft, and a cylinder device having one end attached to each four-bar mechanism and the other end attached to the lower part of the frame. It is characterized by

Furthermore, two links connecting the two ends of the first link of each pair of four-bar mechanisms and the upper end of the second link are formed in a V-shape, and the ends of each link and the upper end of the second link are formed in a V-shape. A feature is that the ends of each cylinder device are attached via spherical bearings.

[Operation] According to the above configuration, while the first link and the second link maintain a parallel state, only the first link moves up and down, causing the frame to move up and down. At this time, since the second link on the side of the two-sleeve traveling drive shaft moves only in the lateral direction, the bending IQ of the intermediate portion free propulsion shaft does not change. Also, bending of the front free propulsion shaft f'f! Even if it is small, a sufficient amount of lift can be obtained.

Furthermore, since the upper link is made into a V-shape and each attachment is equipped with a spherical bearing, it can follow the slope surface.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 6, the frame 10 is connected to the traveling drive wheels 3,
It is supported by 4.

The four-bar mechanism 30 will be explained below. In addition, it has the same configuration as the four-bar mechanism 10 and others.

First, a pair of brackets 50, 50 extending downward are fixed to a portion of the lower part of the frame 10 located above the middle of the traveling drive wheels 3°.1 so as to face each other in the width direction of the frame 10. At the upper and lower ends of the bracket 50, a pair of upper levers 31.3 constituting the four-bar mechanism 30 are provided.
1 and one end of the lower lever 32.32 is connected to the horizontal bin 35.3.
6, and between each end of the lever 31.32 and the pin 35.36 are spherical bearings 31a, 32a.
Or it has been intervened. The other end of the upper lever 31, 31 is connected in a V-shape and is fixed to the front traveling drive shaft assembly 8 in a trapezoidal manner as a support F! It is attached to the upper part of the fourth member 37 via a spherical bearing 31b. On the other hand, each other end of the lower lever 32.32 is attached to a position of the front cooperating shaft assembly 8 near the traveling drive wheel 3 by a pin 38.38, and each other end of the lower lever 32 and the pin A spherical bearing 32b is interposed between the 38 tones.

In this way, the four-bar mechanism 30, as shown in Figure 5.6,
It is composed of an upper lever 31, a lower lever 32, a link (first link) 33 that connects the pin 35 and the pin 36, and a link 34 that connects the spherical bearing 31b and the pin 38,
The link 33 is fixed to the frame IO, and the link 34 is fixed to the front traveling drive shaft assembly 8.

The four-bar mechanism 40 is made up of each component in which the 30 numbers mentioned above are replaced with the corresponding 40 numbers.

Next, each upper end of the cylinder l 7, 18 is connected to the frame 10
A spherical bearing 17 is attached to the lower surface of the cylindrical shaft by a horizontal pin 51.52, and between each upper end and the horizontal pin 51.
a, 18a are interposed. Also, cylinder 17.1
Each lower end of the lever 32.42 is attached approximately centrally to the lever 32.42 by a transverse pin 53.54, and each lower end and the pin 53.
．． Spherical bearings 17b and 18b are interposed between the bearings 54 and 54.

In such a configuration, as shown in FIG.
．． 46 vertically upward, and the front traveling drive shaft assembly 8. For links 34, 44 (second links) on the rear traveling drive shaft assembly 9 side,
The links 33 and 43 (first link) of the frame 10 are now located at the lower position, and the frame 10 supported by the brackets 50, 50 is held in the lowered position.

On the other hand, the cylinder! 7.18, the levers 32 and 42 rotate vertically downward about the pins 36 and 46, as shown in FIG.
and 43 as the side traveling drive shaft assembly 8. It is moved in the -F direction from the links 34 and 44 on the rear travel drive assembly 9 side, and the frame 10 is held in the raised position.

In these operations cylinder I 7,18! Since the levers 32 and 42 are extended and contracted at the same time, the levers 32 and 42 rotate at the same time. At this time, the traveling drive wheel 3.4 is connected to the four-bar mechanism 30. lIO
link 34.4 because it cannot be rotated.
4 moves only in the lateral direction while maintaining the vertical direction (at this time, the intermediate flexible propulsion shaft 7 expands and contracts). On the other hand, the link 33.43 opposite to the link 34.44 is connected to the lever 3.
2. According to the movement of 42, vertical movement is performed and frame 1
Raise and lower 0.

In this way, in the vertical movement, the intermediate portion free propulsion shaft 7
Since it only expands and contracts, the bending angle does not change.

In addition, the 61 degree change of the 04 section free propulsion shaft 6 is also
Since it is only caused by the vertical movement of o, it can be small.

Furthermore, the above configuration has a structure that follows the slope of the running road surface. That is, as shown in FIG. 4, on an inclined surface, the front traveling drive shaft assembly 8 and the rear traveling drive shaft assembly 9 swing around the spherical bearings 31b and 41b according to the condition of the road surface, and the frame 10 is kept almost horizontal.

Note that, in this invention, as in the above embodiment, the upper lever 3
1.31 or upper lever 41. /It is not limited to the V-shaped combination, but these upper levers 31.4
1 in parallel, but with this configuration, it is not possible to follow the slope surface.

[Effects of the Invention] As explained above, the present invention provides a pair of four-joint mechanisms for attaching a frame to each travel drive shaft, and the first link of each four-joint mechanism is attached to the lower part of the frame. four four-bar mechanisms fixed in a downward direction and having a second link opposite to the first link fixed to the travel drive shaft; one end attached to each four-bar mechanism, and the other end attached to the frame; Since it is equipped with a cylinder device attached to the lower part, a necessary and sufficient lift amount can be obtained within the range of the allowable bending angle of the universal propulsion shaft.

Further, two links connecting the upper ends of the first links and the upper ends of the second links of each pair of four-bar mechanisms are formed in a V-shape, and the ends of each link and each of the cylinder devices are formed in a V-shape. Since the end of the wheel is attached via a spherical bearing, it can follow the slope surface.

[Brief explanation of drawings]

1 to 4 are diagrams showing the configuration of a vehicle lifting device according to an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a rear view, and FIG. FIG. 5 is a side view showing the device in the lowered position; FIG. 6 is a side view showing the device in the raised position; FIG. 7 is a side view showing the configuration of a self-propelled trolley equipped with a vehicle lifting device, FIG. 8 is a side view showing the state when the conventional vehicle lifting device is in the lowered position, and FIG.
The figure is a side view showing the state when the vehicle lifting device is in the raised position. 6.7... Flexible propulsion shaft, 8... Front traveling drive shaft azo assembly, 9... Rear traveling drive shaft assembly, IO... Frame, 17 .18
・・・・・・Cylinder, I7a, 17b, I 8a, I
8b, 31a, 3 lb, 32a, 32b, 41 a
, 4 l b, 42 a, 42 b - Spherical bearing, 30° 40...Four joint mechanism, 31.41... Upper link, 33.43... First link, 34
．． 44...Second link, Applicant Camargue Transport Technique Game M Baber And Figure 3 Figure 4

Claims (2)

[Claims] (1) In a vehicle lifting device that lifts and lowers the frame of a vehicle having two traveling drive shafts rotationally driven by a universal propulsion shaft for cargo handling, each pair of four joints attaches the frame to each of the traveling drive shafts. A mechanism, wherein a first link of each of the four-bar mechanisms is vertically fixed to the lower part of the frame, and a second link opposite to the first link is fixed to the traveling drive shaft. four-bar mechanism;
A vehicle lifting device comprising a cylinder device having one end attached to each of the four-bar mechanisms and the other end attached to the lower part of the frame. (2) Two links connecting the upper end of the first link and the upper end of the second link of each pair of four-bar mechanisms are formed in a V-shape, and the ends of each link and each of the cylinders are formed in a V-shape. 2. The vehicle lifting device according to claim 1, wherein the end portion of the device is attached via a spherical bearing.