JPS61188258A - Driving device - Google Patents

Abstract

PURPOSE:To absorb unevenness in size precision of an object to be driven and in using environment coping with said unevenness and to always creat a desired driving state in a stable manner, by a method wherein a power is acted through a buffering part in which gas is sealed up to a proper pressure. CONSTITUTION:A driving device D is disposed in a position around the outer periphery of a turn table 2. The driving device D is formed with a gear motor 6 serving as a power source, a miter gear box 7 serving as a transmitting means, and a wheel 8 to which a tyre 8a as a working means is mounted. With the gear motor 6 driven, the turn table 2, on which a car is placed, is smoothly turned at a given speed. In which case, even if the turn table 2 is inclined because of the rotation center of the turn table 2 being slightly eccentrically positioned and weight exceeding a limit being placed thereon, the tyre 8a pliably copes with said situation to absorb the fluctuation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device, and more particularly to a drive device suitable for use in harsh environmental conditions.

In general, drive units used in auto repair shops, civil engineering construction sites, etc. that use large amounts of oil and water are frequently exposed to oil and muddy water, making it a poor operating environment for rotary drive units. Therefore, the drive unit is likely to break down in a short period of time. In addition, in the case of rotation drive devices for various rotating objects such as turntables,
It is difficult to accurately set the center of rotation, and the momentum device tends to become more precise and expensive.

The present invention has been made in view of the above points, and provides an inexpensive drive device that can withstand harsh usage conditions, absorb various errors, and stably exhibit desired performance. The purpose is to

In order to achieve the above object, the present invention includes a power source, a transmission means for converting the power from the power source into a desired speed and transmitting it, and a power source that is rotatably supported and gas is sealed inside. The driving apparatus is characterized in that it has a buffer section which is maintained at an appropriate pressure, and an operating means for applying the power from the transmission means to the driven object via the buffer section.

=2- Hereinafter, a detailed explanation will be given based on specific examples.

FIG. 1 is a plan view showing a tartar table for automobile maintenance as an embodiment of the present invention, and FIG. 2 is a schematic side sectional view showing the vicinity of the drive device. A turntable 2 on which a car to be serviced is placed is rotatably supported around a central base 1. The turntable 2 of this example has a donut shape with an outer diameter L1 of 18 m and an inner diameter L2 of 8 m, and is installed in the pit P so that its surface height matches the ground height G, as shown in Fig. 2. has been done. This turntable 2 has a huge weight due to its size,
In this example, the support mechanism is configured as follows, and the turntable 2 is rotated smoothly.

In FIG. 1, a drum 2b is attached to the back side of the turntable 2, and the inner and outer circumferential parts of the back surface of the drum 2b are
Vertical load casters 3a and 3b are provided, respectively. These casters 3a and 3b are arranged in an appropriate number of at least four or more each around the entire circumference, and run on an inner circumferential path 4a and an outer circumferential path 4b, respectively, which are provided concentrically at the bottom of the pit P. . On the other hand, an appropriate number of four or more rotation center holding casters 5 are attached to the inner circumferential end surface of the turntable 2 to regulate the horizontal position of the turntable 2 and prevent eccentricity. The casters 5 are supported rotatably in the horizontal direction and come into rolling contact with the outer peripheral end surface 1a of the central base portion 1.

A drive device is disposed at a suitable location around the outer periphery of the turntable 2. As shown in FIG. 2, the drive device of this example includes a 0.4 mw gear motor 6 as a power source, a miter gear box 7 as a transmission means, and a wheel 8 equipped with a tire 8a as a working means.
It consists of A gear motor 6 with a brake that can be smoothly started and stopped is connected to a miter gear box 7 via a chain coupling 9, where the rotational force from the gear motor 6 is converted to the desired rotation speed and direction. . In this example, in order to transmit the power transmitted from the horizontal direction vertically upward, the rotating shaft 7a of the gear box 7 is
is projected vertically upward. A flange 10 consisting of a large-diameter portion 10a and a small-diameter portion 10b is attached and fixed to the rotating shaft 7a, and a rim portion 8b of the wheel 8 is fixed to the surface of the large-diameter portion 10a of the flange by bolts 1. As the wheel 8, a tire wheel of a normal automobile can be used as it is. The flange 10 is covered with a cap 12,
Prevents intrusion of oil, water, etc.

A series of equipment from the gear motor 6 to the wheel 8 described above is fixed to a rectangular frame 13 with bolts 14 so as to be integrally movable as shown in FIG.

The frame 13 is longitudinally movably joined to a base 14 fixed to the bottom of the pit with an appropriate number of anchor bolts (not shown). In this case, frame 13
A plurality of long holes 13a are bored along the longitudinal direction of the hole,
The frame 13 is fixed to the base 14 with bolts 15 through these. base 14 turntable 2
A pair of position adjustment bolts 14a, 14a are held on both sides of the rear end portion away from the bracket 14b in a screwed state, respectively. Each tip of these bolts 14'a is
They are fixed to corresponding rear end portions of the frame 13, respectively.

Therefore, the position of the drive device can be easily adjusted by loosening the fixing bolt 15 and turning the bolt 1.4a.

The operation of the above-described embodiment configured as described above will be explained below.

First, the position of the drive device is set. In this case, let the air out of the tire 8a in advance and loosen all the fixing bolts 15. Then, by turning the position adjustment bolts 14a as appropriate, the frame 13 and the drive device installed thereon are moved together to the desired position, and the bolts 15 are tightened and fixed. Here, an appropriate amount of air is injected into the tire 8a, and its surface is changed to the outer peripheral end surface 2b1 of the turntable 2.
Press it against the In this case, as shown in FIG.
It is required to adjust the internal pressure to such an extent that a can be deformed flexibly following the shape of the drum outer peripheral end surface 2b1 with which it abuts. Therefore, if the desired pressure contact state cannot be obtained, the optimum state is obtained by adjusting the amount of injected air and the position of the drive device.

After the initial setting of the drive device is performed as described above, when the gear motor 6 is operated, the turntable 2 on which the automobile is mounted is smoothly rotated once at a predetermined speed. In this case, even if the center of rotation of the turntable 2 is slightly eccentric, or if the turntable 2 is tilted due to a weight that exceeds the limit, the tires 8a can flexibly respond and absorb these fluctuations. , a desired rotational state can be stably obtained.

-Also, even if oil or water enters the press-contact portion, a sufficiently large contact area is ensured, so the turntable 2 can be driven and rotated efficiently without slipping. Further, even if the tire 8a of the press-contact portion becomes worn out, it can be easily replaced in the same way as replacing a tire on a car, which is convenient in terms of maintenance and management.

In the above embodiment, the turntable 2 is driven by a single drive device, but when driving a larger turntable, for example, three drive devices may be used as shown in FIG. They may be arranged evenly around the turntable 2'. Further, the operating means of the drive device is not limited to the tire wheel, but it is also possible to use a structure in which a buffer member filled with other gas is brought into pressure contact with the drive device.

As described in detail above, according to the present invention, by applying power through a buffer section filled with gas at an appropriate pressure, it is possible to flexibly respond to variations in the dimensional accuracy of the driven object and the operating environment conditions. Correspondingly, this can be absorbed and a desired driving state can always be stably obtained.

In this case, if a tire wheel is used as the operating means, it becomes possible to manufacture at a low cost a drive device that is excellent in durability and can exhibit the flexibility described above. It should be noted that the present invention is not limited to the specific embodiments described above, and it goes without saying that various modifications can be made within the technical scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a schematic side sectional view showing one embodiment of the present invention, and FIG. 3 shows a frame 13 in one embodiment of the present invention. FIG. 4 is a plan view showing another embodiment of the present invention. (Explanation of symbols) 2: Turntable 6: Gear motor 7: Miter gear box 8: Tire wheel 8a: Tire

Claims (1)

[Scope of Claims] 1. A power source, a transmission means that converts the power from the power source into a desired speed and transmits it, and is rotatably supported and has gas sealed inside to maintain an appropriate pressure. 1. A drive device comprising: a shock absorbing section, and an acting means for applying power from the transmitting means to a driven object via the shock absorbing section. 2. The drive device according to item 1 above, wherein the operating means comprises a tire wheel.