JP2587337Y2 - Vehicle lift - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a vehicle lift,
In particular, the present invention relates to a vehicle lift buried under a floor surface to lift a vehicle.

[0002]

2. Description of the Related Art Hydraulic and mechanical lifts have been proposed as conventional vehicle lifts. However, in the event of a failure, the hydraulic lift has a lowering speed unless a considerable amount of oil flows out at once. It is currently used mainly for vehicles because of its high safety because it is slow.

[0003]

However, the hydraulic system has a problem that a hydraulic pump unit is required, the apparatus becomes large and expensive, and a piping work is required at the time of installation, and the installation work is complicated.

[0004] The mechanical system has the advantage of being compact and easy to install because the drive source is usually obtained by a motor, as compared with the hydraulic system. However, as described above, the hydraulic system has the advantage of safety in the event of an emergency. Has the problem of being inferior.

Accordingly, the present invention has been made to solve the above-mentioned problems, and has as its object to provide a vehicle lift having both advantages of a hydraulic type and a mechanical type.

[0006]

In order to solve the above-mentioned problems, the construction of the present invention, which is based on the claims of the above-mentioned utility model registration, aims at solving the above-mentioned problems. The lifting rod 5 is rotatable inside
A screw nut 4 screwed in parallel with the screw rod 4, a ball nut 6 screwed to the screw rod 4, a connecting arm 7 connected between the ball nut 6 and a lower part of the lifting rod 5, 4 and a motor 10 for rotating the motor 4.

[0007]

Next, the operation of the present invention will be described with reference to the accompanying drawings. In the vehicle lift of the present invention, when the lift is moved up and down, first, electric power is supplied to the motor 10 from a power source (not shown). The motor 10 is rotated by the power supply, and the screw rod 4 is driven to rotate. And by the rotation of the screw rod 4,
The ball nut 6 screwed to this rotates, and at the same time, the connecting arm 7 connected to the ball nut 6 and the lifting rod 5 connected to the connecting arm 7 move up or down.

The oil 40 having a predetermined viscosity charged into the cylinder 2 has a buffering function when the lifting rod 5 is about to drop rapidly.

[0009]

1 to 3 show an embodiment of a vehicle lift according to the present invention. This vehicle lift is screwed into a screw rod 4 and a screw rod 4 which are stored in parallel with a lifting rod 5 in a state where the upper part of the cylinder 2 with a lid 3 is airtightly protruded from a bottomed cylinder 2 while being kept airtight. The connecting arm 7 connects the ball nut 6 and the lower part of the elevating rod 5 to each other, and the motor 10 is provided at the protrusion of the screw rod 4.

The lift is mounted on a steel die 30 as shown in FIG. 1, for example. Here, at the bottom of the shape steel 30, usually, a foundation concrete, a quarry stone, or the like is provided. In addition, the portions below the lift steel 30 are vertically buried in the ground.

In this embodiment, a flange 12 is provided on the upper part of the cylinder 2 and the lid 3 is fixed to the flange 12. Further, a metal 11 penetrating the lid 3 is provided,
The lifting rod 5 is guided by the metal 11 and moves up and down. Here, the flange 12 and the lid 3 may be omitted, and the metal 11 may be directly fitted into and fixed to the upper opening of the cylinder 2.

The screw rod 4 uses a ball bolt (ball screw shaft) with which the ball nut 6 meshes, and has a lower end formed by a bearing 32 and an upper part formed by omitting a thread from a bearing 13a.
Each is rotatably supported by a metal 13 having.
The screw rod 4 is rotatable, but the metal 13
In this embodiment, in order to operate a lowering confirmation switch, which will be described later, by raising the screw bar 4, the metal 13 is provided with a slight lift allowable gap. It can be moved up and down within a certain range.

In order to connect the ball nut 6 screwed to the screw rod 4 and the lower part of the lifting rod 5 by the connecting arm 7, the connection between the ball nut 6 and the lifting rod 5 by the connecting arm 7 is changed. However, in this embodiment, if a force other than the vertical direction is applied to the screw rod 4, the screw rod 4 will bend and the conduction between the ball nut 6 and the screw rod 4 will be smooth. May be lost. For this reason, the force from the connecting arm 7 is always applied to the ball nut 6 in the vertical and vertical directions.

That is, an outer cylinder 61 to be loosely fitted is pivotally supported on the ball nut 6 by a horizontal shaft 62, and the above-mentioned flange 61 is connected between upper and lower ends of the outer cylinder 61. The tip of the connecting arm 7 is made to enter. The tip of the connecting arm 7 has a spherical seat 7 at the top and bottom.
1 are provided, and the receiving portions 72, 72 are provided.
Reference numeral 72 is located at a position orthogonal to the axis 62.

Therefore, the outer cylinder 61 has a universal joint-like function, and moves in a direction other than the vertical direction when the connecting arm 7 moves up and down (when the eccentric load is applied to the lift, the elevating rod 5 tilts or flexes slightly). However, the ball nut 6 always receives a force only in the vertical direction. In addition, in addition to the force in the inclined direction, a force in the rotation direction about the central axis as the rotation axis may be applied to the lifting rod 5. In this case, the load receiving portions 72, 72 may come off from the flange portions 62, 62. Therefore, if necessary, a stopper for limiting the displacement of the load receiving portions 72, 72 in the horizontal plane direction within a certain range may be provided.

In this embodiment, a geared motor with an orthogonal brake using gears is used as the motor 10. The motor 10 includes a motor unit 10a and a speed reducer 10
b in the clockwise or counterclockwise direction in FIG. 1 of the motor unit 10a.
The rotation is converted into the rotation of the screw rod 4 in the axial direction while being decelerated. Rotary shaft 1 taken out on the upper surface of reduction gear 10b
A rotating disk 10d is fixed to 0c, and a sensor 10e for detecting a rotating speed of the rotating disk 10d is provided on a side surface of the speed reducer 10b. Sensor 10
The output of e is input to a drive control device of the motor 10 not shown.

A limit switch 5 is provided on the side of the motor 10.
1 is fixed, and a switch operation rod 53 for operating the limit switch 51 is provided in parallel with the screw rod 4 and the lifting rod 5. The lower part of the switch operating rod 53 penetrates the lid 3 and is inserted into the cylinder 2 so as to be able to move up and down. When the lifting rod 5 is raised to the uppermost position, the lower end of the switch operating rod 53 is pushed up on the upper surface of the connecting arm 7 and the limit switch 51 is turned on.
I do. When the limit switch 51 is turned on, the motor 10
The power supply to is stopped, and the motor 10 stops.

A second limit switch 52 is fixed above the rotating disk 10d. When the motor 10 continues to rotate when the lifting rod 5 is lowered to the lowermost position, the ball nut 6 cannot be further lowered.
Act to screw up and rise. If the screw rod 4 can be moved up and down in a predetermined range, specifically, the metal 13 is provided with a slight up-and-down allowable gap, and the reduction gear 10b applies a rotational force to the screw rod 4 by key connection. If the information is transmitted, the screw rod 4 is raised and the second switch 52 is operated. When the second limit switch 52 is turned off by raising the screw rod 4, the motor 1
0 is shut off, and the motor 10 stops.

The inside of the cylinder 2 is filled with oil 40 having a predetermined viscosity up to, for example, the vicinity of the upper portion of the screw rod 4 as shown in the figure. The oil 40 is used to supply the screw rod 4 and prevent vibration when the lifting rod 5 is raised and lowered.
Further, it serves as a damper for preventing the elevating rod 5 from dropping abruptly when the elevating rod 5 falls due to some trouble. A plate 5a having a larger lower surface area is attached to the lower surface of the lifting rod 5 in order to maximize the damper function.

Further, in the illustrated embodiment, a ratchet wheel 8 is fixed to the projecting portion of the screw rod 4 and a claw 26 of the ratchet wheel 8 is provided at a fixed portion such as the upper surface of the lid 3 to prevent the fall. Equipment is attached.

The above ratchet wheel 8 and ratchet pawl 26
A conventionally known one can be used, and forward rotation is allowed, but reverse rotation is suppressed. In addition, this ratchet claw 2
A spring 27 is attached to 6 to urge the ratchet pawl 26 in such a direction as to always lock the ratchet wheel 8 with the ratchet wheel 8.

The ratchet pawl 26 is connected to a detachable device 24 such as a solenoid which can detachably engage the ratchet wheel 8 when necessary. When the lift is lowered, the motor 10 cannot be energized unless the attachment / detachment device 24 is operated to disengage the ratchet pawl 26 from the ratchet wheel 8. In the case of the present embodiment, each ratchet claw 26 forming a pair of lifts 1, 1
The detachable confirmation sensors 25 are provided respectively, and the motor 10 can be energized in a state where the detachable confirmation sensors 25 confirm that the ratchet claws 26 are both detached. As the attachment / detachment confirmation sensor 25, for example, a limit switch is used, and when the limit switch is in an ON state, the motor 10 can be energized.

In the above description, the reason why the attachment / detachment confirmation sensor 25 is attached is that if the lifting rod 5 is lowered before the attachment / detachment of the ratchet pawl 26, the ratchet wheel 8 is engaged with the ratchet pawl 26 firmly. This is because the attachment / detachment of the ratchet claw 26 by the attachment / detachment device 24 becomes impossible. In addition, even if this safety device functions, the ratchet pawl 26 and the ratchet wheel 8 may be firmly engaged with each other.
It is desirable that a descending operation must be performed after raising the.

In the figure, reference numeral 16 denotes a scraper, and reference numeral 18 denotes a wear ring. A loading platform (not shown) is attached to the upper end of the lifting rod 5.

[0025]

As described above, the present invention can provide a vehicle lift that drives the screw rod 4 by the motor 10 and moves the lifting rod 5 connected to the screw rod 4 via the connecting arm 7 as described above. .

Since there is no drive portion exposed outside the cylinder 2 at the lower portion of the entire device, it is not necessary to store the entire device in a large box. Since a large box is not used, the manufacturing cost is reduced, and the space occupied during transportation and storage is reduced. Also, in the installation work, the amount of soil to be excavated can be reduced as compared with the case where a conventional large box is used, and a vehicle lift excellent in workability can be provided.

Further, the effects of the present invention that can be particularly noted are that the oil of a predetermined viscosity charged into the cylinder 2 is supplied with oil to the screw rod 4, prevents vibration when the lifting rod 5 is raised and lowered, and raises and lowers the lifting rod 5 due to some trouble. Since it serves as a damper for preventing the elevating rod 5 from dropping suddenly when it falls, it is possible to provide a vehicle lift having the same safety and ease of maintenance as a hydraulic type even with a mechanical type. Things.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the vehicle lift of the present invention.

FIG. 2 is a plan view of the lift with a lid removed.

FIG. 3 is an enlarged view of the “FIG. 1” lift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lift 2 Cylinder 3 Lid 4 Screw bar 5 Elevating rod 7 Connecting arm 10 Motor

Claims (1)

(57) [Scope of request for utility model registration] 1. A screw rod (4) housed in a cylinder (2) filled with an oil (40) of a predetermined viscosity in a rotatable state in parallel with a lifting rod (5); ), A connecting arm (7) connected between the ball nut (6) and the lower part of the lifting rod (5), and a screw drive (4). And a motor lift (10).