JPS5835563Y2 - Car maintenance lift - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automobile maintenance lift used to lift up the vehicle body during maintenance, repair, or inspection of large buses, large trucks, etc.

Conventionally, this type of lift for large vehicles has a hydraulic cylinder A-A' buried under the installation floor, a vehicle body support frame B-B' at the upper end, and one of the cylinders is connected to the vehicle, as shown in Fig. 1. It is possible to adjust the movement to match the size of the
This is a so-called autolift in which the vehicle is lifted up by the operation of hydraulic cylinders B-B', and four or six columns C are erected on the floor as shown in Figure 2, and wire ropes are attached to each column. Alternatively, a device in which the drive-on plate D and the support beam E are brought into contact with the vehicle and lifted up using a hydraulic cylinder or the like has been put into practical use.

However, as shown in Figure 1, the auto-lift type has the disadvantage that it requires foundation work for a very deep and large pit P, which requires a great deal of cost and time for installation. Since it is almost fixed due to restrictions, there is a drawback that maintenance work at that location is difficult.

The floor-mounted multi-column lift shown in Fig. 2 has the advantage of relatively easy installation and foundation work, but it requires a large installation floor area and a drive-on-play 1-D on the access floor.
and the support beam E runs in the entry direction, so
There are restrictions on the entry angle, and a large space is required to correct the orientation of the vehicle before entry.Also, the lower surfaces of both sides of the vehicle body are supported by the drive-on plate D1 or support beam E, which eliminates difficult maintenance work. There are possible drawbacks.

The present invention was made in order to eliminate the above-mentioned drawbacks, and consists of two pairs of columns facing each other, vertically installed on the foundation frame, and the foundation frame buried in the installation floor. The other pair of supports are vertically installed on the foundation carriage, and are movably installed on rails buried in the installation floor via rollers so that they can be adjusted to match the length of the maintenance vehicle. The front and rear ends of the maintenance vehicle are supported by the vehicle body support beams connected between the opposing columns, and the vehicle is lifted up.
In addition, the vehicle body support beam connected between the fixedly installed columns is configured so that it can be stored under the foundation surface when it is lowered to its lowest point, making it possible to install it with simple foundation work, eliminating the need for conventional deep pit construction. This is an automobile maintenance lift that has the following features: the platform has no undulations and is easy to enter, and since the vehicle body is supported at the front and rear ends of the vehicle, there are no difficult-to-maintain parts. It is intended to provide.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
1 and 2 are fixed columns, 3 and 4 are movable columns, and one of the opposing columns 1 and 3 is a drive column having hydraulic units 5 and 6, and drive lift cylinders 7 and 8 are suspended within the column. It is set up.

The pillars 2 and 4 are driven pillars, and driven soft cylinders 9 and 10 are vertically installed inside the pillars.

Each pillar 12, 3, 4 has a soft cylinder 7, 9, 8, 1
Drive plate 12 that operates with piston rods 11 and 11' of 0
are fitted to be vertically movable, and vehicle body support beams 13 and 14 are connected and fixed to this drive plate 12 between the drive plates 12 of opposing columns.

The fixed columns 1 and 2 are vertically installed at both ends of the base frame 15, and engage the vehicle body support R beam 13 fixed to the drive plate 12 so as to be able to move up and down.

The vehicle body support R beam 13 is housed in the foundation frame 15 when lowered to its lowest position.

The movable struts 3 and 4 are vertically installed on the base carriage 16, and engage the vehicle body support F beam 14 fixed to the drive plate 12 so as to be able to move up and down.

A foundation carriage 16 with movable columns 3 and 4 hanging thereon is movably mounted on each of two rails 18 for movement in a pit 17 provided on both sides of the lift installation floor via rollers 19, and can be moved by the chain 21 and sprocket 22 by rotation of the chain 21 and the sprocket 22.

The pit 1γ is provided with a pit cover 23 made of a steel plate to ensure safety.

Oil from hydraulic units 5 and 6 passes through pipe 24 to 1
Oil is added to the primary working chamber 26 divided by the piston 25 of the driving cylinders 7, 8, and operates the piston 25.The driving lift cylinders 7 and 8 also have oil added to the secondary working chamber 27 divided by the piston 25. Fill with Z, piston 2
5, oil is added to the working chambers 29 of the driven lift cylinders 9 and 10 through the pipe 28 to actuate the piston 30.

By setting these devices in this way, the working volume of the secondary working chambers 2γ of the drive lift cylinders 7 and 8 and the working volume of the working chambers 29 of the driven lift cylinders 9 and 10 are made equal. , lift cylinder 7/8-9/10
The piston rod 11- fixed to the piston 2530 of
11' can be synchronously displaced up and down.

The hydraulic units 5 and 6 provided on the fixed columns 1 and 2 and the movable columns 3 and 4 have the same specifications, and can be moved up and down in synchronization by controlling start and stop at the same time.

Note that control switches (not shown) are capable of simultaneous control and independent control.

To explain the lift-up operation of a maintenance vehicle using the lift of the present invention, first, the vehicle body support R-beam 13 on the front side where the lift is entered is lowered to its lowest position and housed in the foundation frame to facilitate the entry of the vehicle.

The movable struts 3 and 4 are moved under the control of the motor 20 to positions that match the body length of the maintenance vehicle.

Enter the maintenance vehicle from the fixed columns 1 and 2 side and stop when the rear support point of the vehicle matches the vehicle body support R beam 13. Operate the hydraulic unit 5 to raise the vehicle body support R beam 13 and stop when it touches the support point. do.

Next, the motor 20 is controlled to move the movable struts 3 and 4 to a position where the vehicle body support F beam 14 fits with the vehicle front support point, and the hydraulic unit 6 is operated to raise and support the vehicle body support F beam 14. It touches a point and stops.

Next, the hydraulic units 5 and 6 are simultaneously operated to generate hydraulic pressure and oil is sent through the piping 29 to the drive-side lift cylinders 7 and 6.
Apply hydraulic pressure to 8.

The driving side lift cylinders 7 and 8 operate the piston rods 11 due to hydraulic action, and the piston rods 11' of the driven side lift cylinders 9 and 10 operate in synchronism due to the hydraulic action of the secondary working chamber 27 to level the vehicle. can be raised to

When the vehicle reaches the desired height, the hydraulic units 5 and 6 are stopped to stop the oil supply and the oil valve (not shown) is closed to stop both piston rondes from rising, and the vehicle reaches the desired height. can carry out maintenance work.

To lower the vehicle, by opening the oil valve and communicating the hydraulic units 5 and 6 with the lift cylinders, the vehicle and body support beams 13 and 14 automatically push down the piston rods 11 and 11' and lift cylinders 7 and 8-. 9
・The oil is returned to the hydraulic units 5 and 6 by the oil pressure from 10, and the vehicle can be lowered.

As described above, according to the present invention, installation is possible with simple foundation work, and there is no undulation on the entry floor surface, so it is easy to enter the vehicle, and since there is nothing between the front and rear vehicle body support beams, It is possible to provide a maintenance lift with a large maintenance space where work can be performed safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are general schematic diagrams of a conventional device that is known and put into practical use. 3 to 6 are schematic diagrams each showing an embodiment of the present invention,
3 is a side view of the lift, FIG. 4 is a front view of the lift, FIG. 5 is a schematic diagram of the structure of the drive device, and FIG. 6 is a schematic three-dimensional diagram showing the overall structure of the lift. 1.2...Fixed support column, 3.4...Movable support support, 5.6...Hydraulic unit, 13.14.
...Car body support beam.

Claims (1)

[Scope of utility model registration request] In an automobile maintenance lift equipped with two pairs of columns facing each other, a pair of left and right columns in front of the entrance of the car are fixedly installed, and the other pair of columns are installed on the foundation surface so that they can move in the direction of entry, and each A vehicle characterized in that vehicle body support beams that move up and down in synchronization are connected between opposing left and right columns, and the vehicle body support beam on the side nearer to the vehicle can be stored under the foundation surface when lowered to its lowest position. Maintenance lift.