JPS6155095A - Swivel slide simultaneously functioning as correction of inclination of height service 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] 2nd generation 1LLΩ different” L is field.

TECHNICAL FIELD This invention relates to a swivel base with inclination correction that is used, for example, in an elevated work vehicle such as a ladder vehicle.

In general, for example, in high-altitude work vehicles such as ladder vehicles,
In order to improve work safety when stopped on a slope, etc., it is necessary to correct the slope in some way so that the working machine, such as a ladder on a swivel platform, can move up and down within a vertical plane. be.

As a method of correcting the inclination so that the raising and lowering movement of the boom on the swivel platform is performed within the vertical plane, there is a method of equipping the boom with a posture correction device so that the boom is positioned within the vertical plane, and a method of fixing the vehicle body with outriggers. There are known ways to level it.

The two conventional correction methods mentioned above had the following problems.

In other words, in the former method that includes a correction device, the tilt of the ladder is corrected while the swivel table remains tilted, so a correction operation is required every time the swing position changes, which is not only unreasonable in terms of work, but also causes damage to the ladder. Incorporating a correction device into a device that moves the body up and down often complicates the mechanism.

In addition, in the latter method of using outriggers, it is necessary to lift the wheels off the ground in order to level the car body itself, and the outriggers require an extra large support capacity and car body lifting stroke. In order to obtain stability, the mounting position of the outrigger is limited, which is a constraint on the main body design.

. The present invention was proposed in order to solve the problems of the above-mentioned conventional inclination correction method. By blooming the two rings overlapped and rotating the two rings by a predetermined angle, the relative angle of the overlap of the two rings and the direction of the two overlapped rings can be applied to the table relative to the main body. The table is made to have a predetermined inclination and direction, so that the table can be horizontally corrected.

That is, the present invention includes a first ring fixed to the vehicle body at the turning center of the aerial work vehicle, a second ring rotatably supported by the first ring via a first rolling bearing, a third ring rotatably supported on the second ring via a second rolling bearing having an axis oblique to the axis of the first rolling bearing; The third rolling bearing has an axis that is oblique to the axis of the second rolling bearing and is located in a position parallel to the first rolling bearing when the tilt correction operation is not performed. a fourth ring rotatably supported on the fourth ring; a table fixed on the fourth ring; a device for preventing the table from rotating with respect to the main body; and the first ring. and a second fixing device that fixes the second ring and the third ring so that they do not rotate relative to each other. A high place characterized by comprising a first drive device that relatively rotates the first wheel and the second wheel, and a second drive device that relatively rotates the table and the third wheel. This is a swivel platform with tilt correction for work vehicles.

Figure 4 shows an aerial work vehicle to which this invention is applied.
In the figure, (1) is the vehicle body, (2) is the swivel base with tilt correction installed at the rear of the vehicle body (1), and (3) is the swivel base (2).
), (4) is the support frame installed on the support frame (
3) is a ladder whose root portion is pivoted; (5) is a cylinder that raises and lowers the ladder (4); (6) is an outrigger; and (7) is a ladder holder.

The structure of the swivel table with tilt correction (2) is as shown in FIG. In the figure, (8) is the first wheel attached to the vehicle body (1) with the mounting bolt (9), and (10) is the first wheel (10).
8) is a second ring rotatably supported via a first rolling bearing (11); (12) is a second ring rotatably supported via a first rolling bearing (11); ), a third ring (14) is rotatably supported via a second rolling bearing (13) having an axis (b) oblique to the third ring (12); Axis (b) of rolling bearing (13)
through a third rolling bearing (15) which has an oblique axis (c) to The fourth ring (16) is rotatably supported by the fourth ring (
14) a table mounted with mounting bolts (9) on top;
(17) is a rotation prevention device that prevents the table (16) from rotating with respect to the vehicle body (1), and a pin (19) is installed in a sleeve (1) that extends integrally with the lower surface of the table (16).
The lower end of the pin (19) protruding from the sleeve (18) is loosely fitted into the oblong hole (20) bored in the vehicle body (1) as shown in FIG. There is. (21
) is a first fixing device that fixes the first ring (8) and the bearing (10) of 'NS2 together, and the axis (a) of the first rolling bearing (11) is attached to the first ring (8). Screw in the fixed pole (22) so that it can move forward and backward toward the fixed pole (22), and firmly press the lining (23) against the outer peripheral surface of the second ring (1o) with the tip of the fixed pole (22) to fix it. I can do it.

(2=1) is a second fixing device that fixes the second bearing (10) and the third ring (12) together, and the second rolling bearing (13) is attached to the third ring (12). The fixing bolt (25) is screwed in so that it can move forward and backward toward the axis (b), and the fixing bolt (25)
) The lining (26) can be firmly pressed against the outer circumferential surface of the second ring (12) to fix it. (27)
is a drive device installed on the vehicle body (1), and the handle (2)
It is connected to the vehicle body (1) via a gearbox (29).
), a small gear (31) fixed to the upper end of a rotating shaft (3o) extending upward through the shaft, and a large gear (32) integrally formed on the lower end of the inner circumferential surface of the second shaft (1o). It meshes with the (33) is a drive device installed on the table (16), which is connected to the handle (34) via a gear box (35) and extends downward through the table (16) at the lower end of the rotating shaft (36). Small teeth fixed on! (37), the third
A large gear (
38).

The above is the configuration of this invention, and next, based on the above configuration, the fourth
As shown in the figure, the operations will be sequentially explained by taking as an example the case where the vehicle body (1) is installed on the ground where the left side in the figure is low.

First, in the state shown in FIG. 1, the first fixing device (21)
Loosen the fixing bolt (22) and the fixing bolt (25) of the second fixing device (24), and then loosen the first ring (8) and the second ring (
Fixation of 10) and second ring (10) and third ring (12)
to release the fixation.

Next, the rotating shaft (30) is rotated by the handle (28) of the first drive device (27), and the small gear (31) and the large gear (32) are rotated.
The second ring (10) is rotated by the engagement of the two wheels. Then, the second bearing (10) rotates relative to the vehicle body (1) and the table (16), and the second rolling bearing (13) also becomes inclined in the direction shown in FIG. 3. In this state, tighten the fixing pole (22) of the first fixing device (21), and then tighten the second drive device (33) to fix the second transport (1o) to the first wheel (8). ) is used to rotate the rotating shaft (36), and only the third shaft (12) is rotated by the meshing of the small gear (37) and the large gear (38). Then, the second import (
10), the third ring (12) is supported via the inclined second rolling bearing (13), so the fourth ring (14)
And the lower left side of the table (16) in the figure is lifted up. This operation is continued until the table (16) becomes horizontal, and when the inclination of the table (16) is corrected and becomes horizontal as shown in FIG. 3, the second fixing device (24)
(25) and fix the third ring (12) to the second ring (10). In this state, remove the bottle (19) from the detent device (17) and place it on the table (16).
When the rotating shaft (36) is rotated with the handle (34) of the second drive device (33), the small gear (3
7) and the large gear (38), the table (16) rotates on a horizontal plane.

In the above operation description, the first drive device (27) first rotates the second wheel (1o), and then the second drive device (33) rotates the third wheel (12) and the table (16). ), but it is up to you whether to rotate the second wheel (10) or the third wheel first, and the second wheel is rotated by the first drive device (27). (1o) and the third import (
12), and the second drive (33) can also be dedicated to the rotation of the table (16). Note that if the third wheel (12) is rotated before the second wheel (1o), the third wheel (12) once positioned rotates the second wheel (1o). To prevent it from moving, place the third ring (work 2) on the fourth ring (14) or on the table (
A third fixation device (not shown) is required to fix it to 16). This third fixing device is connected to the first or second fixing device (
21) It is possible to use the same structure as (24), but in addition to this, for example, from the second drive device (33) to f63
A worm gear or the like may be used as the power transmission mechanism to the third wheel (12), or a locking mechanism may be provided to this power transmission mechanism to connect the second drive device (33) from the third wheel (12) side. It is also possible to make it immovable and use this power transmission mechanism itself as a third fixing device.Furthermore, the first drive device (27)
The power transmission mechanism of the above-mentioned second drive device (33)
It is also possible to provide a fixing function for the second ring (10) in the same way as the power transmission mechanism, and use this as the first fixing device. In this case the first fixing device (21) shown is not necessary.

Although one embodiment of the present invention has been described above, each component can be changed to have the same function. An example of this change will be explained next.

As shown in the above embodiment, the swivel base (2) is connected to the first transport (2).
There is a second import (10) in 8), and a second ring (10)
There is a third ring (12) outside the
) In addition to a combination in which the fourth ring (14) is placed inside the ring (14), any combination of inside and outside can be adopted.

The first and second drive devices (27) and (33) may be of the manual type as described above, or may be one using an electric motor, a hydraulic motor, or the like. Also the first and second
In addition to the method of transmitting power from the drive device (27) (33) to the second and third wheels (10) (12) using external gears and internal gears as in the embodiment, a method using a worm gear can also be used. Any drive method such as belt drive or chain drive can be adopted.

In the above embodiment, the first and second fixing devices (21) and (24) are of a type in which the running parts (23) and (26) are pressed by the fixed poles (22) and (25), but In addition, any fixing method may be used, such as using a hydraulic cylinder or pneumatic cylinder as a driving means, or inserting a locking pin into a hole provided in the second or third ring (10) (12) as a locking means. can be adopted.

The device (17) for preventing rotation is a pin (19) attached to the vehicle body (1) from the table (16) as in the first and second embodiments.
For example, as shown in Fig. 4, the ladder (3) of the aerial work vehicle is locked to the ladder receiver (7). This ladder receiver (7) can be used as a device for preventing rotation.

Furthermore, it is also possible to install a tilt detection means on the table and automatically control the driving device and the fixing device using the electric signal from the tilt detection means to correct the tilt.

According to the present invention, when an aerial work vehicle is stopped on a sloping ground, a work machine such as a ladder can be attached to the vehicle without straightening the vehicle body horizontally using an outrigger. The table can be straightened horizontally.Also, since the table itself is straightened horizontally in the device of the present invention, it is similar to when a posture correcting device is added to a device that raises and lowers a work machine such as a ladder on the table. Furthermore, it is possible to eliminate the unreasonable need for posture correction every time the direction of a working machine such as a ladder is changed.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the configuration of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. A cross-sectional view showing the condition,
FIG. 4 is a side view showing an example of an aerial work vehicle to which the present invention is applied. (1) - Vehicle body, (2) - Swivel base with fine assembly correction, (8
) - first ring, (1o) - second ring, (11) - first rolling bearing, (12) - third ring, (13n -
Second rolling bearing, (14)...Fourth ring, (15)
--- Third rolling bearing, (16) --- Table, (17) --- Rotating device, (21) --- First fixing device, (24) --- Second fixing device, (27)
--- Driving device for fresh s1, (33) --- Second driving device.

Claims (1)

[Claims] (1) A first ring fixed to the vehicle body at the turning center of the aerial work vehicle; a second ring rotatably supported by the first ring via a first rolling bearing; a third ring rotatably supported by the second ring via a second rolling bearing having an axis oblique to the axis of the first rolling bearing; via a third rolling bearing, which has an axis obliquely intersecting with the axis of the second rolling bearing and is located parallel to the first rolling bearing when the tilt correction is not performed. a fourth ring rotatably supported; a table fixed on the fourth ring; a device for preventing the table from rotating with respect to the vehicle body; a first fixing device that fixes the two rings so that they do not rotate relative to each other; a second fixing device that fixes the second ring and the third ring so that they do not rotate relative to each other; An aerial work vehicle comprising: a first drive device that relatively rotates a table and a second wheel; and a second drive device that relatively rotates a table and a third wheel. Swivel table with tilt correction.