JPH0446961Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wheel dolly for raising, lowering, and moving the wheels of a vehicle such as an automobile while supporting them when the wheels are attached or detached.

(Prior art) Conventionally, the drive of the clamping part in this type of wheel dolly has been disclosed in Japanese Utility Model Publication No. 17943/1983 and Japanese Utility Model Publication No. 54-1989.
As shown in Publication No. 23707, there are screw type and hydraulic type, but the former is slow in lifting and lowering and lacks quickness, while the latter is formed by a combination of hydraulic and link mechanisms. The mechanism is complicated and the lifting stroke is small, so it can only be used when the vehicle is lifted to a certain height.
There were restrictions on the scope of its use.

Furthermore, when disassembling a vehicle, only the lower part of the vehicle is supported by the support arm of the wheel dolly, so if you disassemble the vehicle while applying an impulse to the tightly fitted wheels, the wheels may not be able to be held stably. There were flaws.

(Technical problem to be solved by the invention) The technical problem to be solved by the invention is to simplify the elevating mechanism of the gripping part in the wheel-dolly, increase the upward stroke, and further improve the The purpose is to hold the wheel stably.

(Technical means for achieving the technical problem) The technical means of the present invention for achieving the above technical problem consists of an oil tank filled with hydraulic oil in an underframe equipped with moving wheels, and an oil tank that stands vertically. A pair of pipe struts are provided, an operating console communicating with the oil tank is provided, a compressed air supply/discharge cock is connected to the operating console, an actuating cylinder is accommodated in the pipe strut, and the actuating cylinder is connected to the operating console. The lower part and the oil tank are connected through a valve for supplying and discharging hydraulic oil, and an actuating rod with a piston at the lower end is vertically slidable and watertightly fitted into the actuating cylinder, and a pair of elevating and lowering rods forming a support frame are installed. a pair of support arms that fit a pipe to the outer periphery of a pipe strut so as to be able to slide up and down, and that the elevating fitting engages the upper end of the pipe strut to form a support frame together with the elevating pipe to support the wheels of the vehicle; is provided horizontally protruding from the lower part of the elevator pipe, and a stop piece is provided upwardly at the tip of the support arm.

(Function) According to the above means, the compressed air supply/discharge port connected to the operation console is opened, compressed air is supplied from the same pot into the oil tank, and the hydraulic oil is supplied/discharged while pressurizing the upper surface of the hydraulic oil. When the valve is opened, the hydraulic oil in the tank is simultaneously injected into the left and right actuating cylinders via the suction and discharge pipes, and hydraulic pressure acts on the piston at the lower end of the actuating rod in the actuating cylinder, pushing the actuating rod upward. The elevator pipe rises in conjunction with the rise of the operating rod, and a support arm protruding from the elevator pipe supports the wheels of the vehicle from below.

At this time, the elevator pipe is stopped at the raised position by closing the hydraulic oil supply and discharge valve, and in this state, the wheel is removed from the axle.

Next, in order to lower the support arm holding the wheels, first stop the supply of compressed air to the oil tank, then switch the compressed air supply/discharge port to the exhaust side, and transfer the compressed air in the oil tank to the oil tank. After being discharged to the outside, by opening the valve for supplying and discharging hydraulic oil, the hydraulic oil in the operating cylinder is pushed back into the oil tank by the weight of the support frame and wheels, and the support arm is lowered.

Further, the wheel removed from the axle is lowered to an appropriate height, moved together with the underframe by the moving wheels, and then the support arm is further lowered to place the wheel on the floor. Next, when installing the wheels, perform the above operations in the reverse order.

(Example) An embodiment of the present invention will be described based on the drawings.

The wheel dolly A of the present invention is composed of an underframe 1 and a support frame 2.

The underframe 1 is formed into a substantially H-shape in plan view by connecting a pair of parallel leg pipes 1b of appropriate length with moving wheels 1a at both front and rear ends, and connecting them with an oil tank 3. A pair of pipe supports 5 are arranged in parallel, and an operating cylinder 6 is housed inside.

The oil tank 3 is a member for storing hydraulic oil, and is constructed of a pipe having a larger diameter than the leg pipes 1b, and is installed orthogonally between the pair of parallel leg pipes 1b on the rear side. Further, a hollow operation console 4 is provided in the center of the rear side of the oil tank 3, and the operation console is communicated with the oil tank 3 through through holes 3a and 3'a, and the upper surface of the operation console 4 is used for supplying and discharging compressed air. Kotoku 1
1 and a hydraulic oil supply/discharge valve 12 are provided, respectively.

The inside of the operation console 4 communicates with the oil tank 3 through through holes 3a and 3'a, and forms a part of the tank 3.

The compressed air supply and discharge tank 11 is the oil tank 3
An intake port 11a that is attached to the operation console 4 communicating with the tank 3 and can be connected to a compressed air intake hose such as a compressor, and that introduces compressed air into the tank 3 and an exhaust port 11b that discharges the compressed air from the tank 3. , and air supply and exhaust is performed by operating the opening/closing lever 11c.

The hydraulic oil supply/discharge valve 12 has a suction pipe 12a connected to the oil tank 3, and a bifurcated discharge pipe 12b connected to the operating cylinder 6 housed in the left and right pipe supports 5, so that the valve 12 can be opened and closed. Operating oil from the oil tank 3 is supplied to the left and right operating cylinders 6 by opening and closing the valve 12c.

The pipe supports 5 stand parallel and vertically at appropriate intervals on both left and right sides of the upper surface of the oil tank 3.
An operating cylinder 6 having a slightly shorter length is housed within the support column 5.

The operating cylinder 6 has a hydraulic oil supply/discharge valve 12 at its lower end.
is connected to the oil tank 3 through the cylinder 6a.
An actuating rod 7 having a piston 7a at its lower end is slidably and watertightly fitted therein. Actuation rod 7
The hydraulic oil injected from the lower end of the operating cylinder 6 moves up the cylinder 6a and lifts the elevator pipe 8.

Reference numeral 7a is a stop ring that controls the upward stroke of the actuating rod 7.

The support frame 2 is composed of a pair of elevator pipes 8 and a support arm 9 that projects horizontally from the lower part of the elevator pipe 8. The elevator pipe 8 has a length shorter than the pipe support 5, and A cap 8a is screwed onto the upper end of a pipe having a diameter larger than that of the support column, and horizontal pipes 8b are installed on both upper and lower sides in parallel with the oil tank 3, and are fitted to the outer periphery of the pipe support column 5 so as to be vertically slidable. Possibly said actuating rod 7
The upper end and the cap 8a are in contact with each other and interlock with the rod 7.

The support arm 9 is L-shaped and has a length that holds only the lower part of the single wheel B, and has a stopper piece 10 at its tip that holds and fixes the wheel B in an upward direction, that is, at a right angle to the center of the wheel. and is attached to the lower part of the left and right elevator pipes 8 so as to protrude forward.

14, as shown in Fig. 8, connect the upper part of the wheel B with a chain C
15 is a cradle for preventing the wheel from falling backward.

It should be noted that the pipes used in the wheel dolly A described above can be constructed at low cost by using gas pipes for all of the pipes except for the operating cylinder 6.

(Effects of the invention) Since the invention has the above configuration, it has the following effects.

The pressure of compressed air is converted to the pressure of hydraulic oil, and the support frame is operated by the hydraulic pressure, so it is possible to use the power that is readily available, such as a compressor that is regularly installed at a gas station or repair shop, and it is also easy to operate. It is simple, accurate and can increase speed.

By converting compressed air pressure into hydraulic oil pressure and using the hydraulic pressure to move the support frame up and down, it is possible to take a large upward stroke, and the height position of the wheel lifted with jacks etc. It can be used not only for vehicles at any height, but also for vehicles at any height.
It is capable of carrying out different repair work at the same time and is excellent at comprehensive work.

Since a stopper piece is provided at the tip of the support arm, the wheel can be held with good stability when the wheel is attached or detached.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical side view of the wheel dolly, Fig. 2 is a rear view, Fig. 3 is a plan view, Fig. 4 is an enlarged sectional view of the main parts, and Fig. 5 is a longitudinal sectional side view of the wheel dolly.
The figure is an enlarged sectional view of Fig. 3, Fig. 6 is a sectional view of Fig. 5, and Fig. 7 is a sectional view of Fig. 5.
FIG. 8 is an enlarged cross-sectional view of the wheel dolly with wheels attached, and FIG. 9 is a diagram showing the state in which it is used. In the diagram, A...Wheel dolly, B...Wheel,
1...Underframe, 1a...Movement wheels, 2...Support frame, 3...Oil tank, 4...Operation table, 5...
Pipe support, 6... Actuation cylinder, 7... Actuation rod,
8... Lifting pipe, 9... Support arm, 10... Stopping piece, 11... Compressed air supply/discharge cock, 12...
Valve for supplying and discharging hydraulic oil.

Claims (1)

[Scope of utility model registration request] An underframe equipped with moving wheels is provided with an oil tank filled with hydraulic oil and a pair of pipe supports that stand up in parallel, an operating table whose interior is communicated with the oil tank is provided, and compressed air is supplied and discharged to the operating stand. At the same time, an operating cylinder is housed in the pipe support, the lower part of the operating cylinder is connected to an oil tank via a valve for supplying and discharging hydraulic oil, and a piston is provided at the lower end of the operating cylinder. The actuating rod is vertically slidably and watertightly fitted, a pair of elevator pipes constituting the support frame is vertically slidably fitted to the outer periphery of the pipe support, and the elevator pipe is engaged with the upper end of the pipe support. , a wheel dolly in which a pair of support arms that together with the elevator pipe constitute a support frame and support the wheels of the vehicle are provided horizontally protruding from the lower part of the elevator pipe, and a stop piece is provided upwardly at the tip of the support arm. .