JPH0621999Y2 - Elector turning drive for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an improvement of an erector swivel drive device device for a shield machine, which swivels and drives an erector that assembles a segment in a tunnel excavated by a shield machine.

[Prior Art] Generally, an erector device for assembling a segment in an excavation tunnel is provided in a shield machine.
This erector has the configuration shown in FIGS. 3 to 6.

As shown in the figure, the erector 1 includes an annular erector frame 4 supported in a shield frame 2 so as to be rotatable along a circumferential direction of the shield frame 2 via a support roller 3. The erector frame 4 holds a segment. An arch-shaped suspension beam 6 having a grip portion 5 at the center is provided so as to be reciprocally movable in the radial direction via a cylinder. Further, the erector 1 is provided with a device 7 that drives the erector frame 4 to rotate. As shown in FIG. 4, the drive device 7 includes a gear 8 provided on the eclectic frame 4 along the circumferential direction thereof, a drive pinion 9 meshing with the gear 8, and a drive pinion 9 for connecting the output shaft 10 to the output shaft 10. It was mainly composed of the hydraulic motor 11 attached to the. In particular, since the hydraulic motor 11 directly drives the erector 1 to rotate, a low torque hydraulic motor with a large torque has been adopted.

By the way, when the segment assembly is to be automated, the erector frame 4 is required to have a slight speed just before the stop due to the bolt hole alignment at the time of the segment assembly and to maintain the posture as it is after the stop.

[Problems to be Solved by the Invention] However, in the conventional erector turning drive device, since the structure is such that the low-speed hydraulic motor with a large torque is used for direct drive as described above, the hydraulic motor is driven at 1 to 2 rpm.
Even when trying to rotate at a low speed, the inside of the hydraulic motor pulsated and a stable low speed could not be obtained.

In addition, even if you try to stop and maintain the erector at the same position after adjusting the bolt holes for automation, you cannot install a compact brake because the motor has a large torque. However, it was difficult to reliably hold and stop due to an oil leak.

An object of the present invention is to solve the above-mentioned problems and to provide an erector drive device for a shield machine, which can stably rotate the erector at a fine speed and can surely stop and hold the erector.

[Means for Solving the Problems] In order to achieve the above object, the present invention is a device for swinging and driving an erector that is swingably supported in a shield frame along its circumferential direction and that assembles a segment in an excavation tunnel. , A gear provided along the circumferential direction of the erector, a high-speed hydraulic motor, an input shaft is connected to the output shaft of the motor, and a drive pinion that meshes with the gear is attached to the deceleration output shaft. And a brake provided on the output shaft of the high-speed hydraulic motor and the input shaft of the speed reducer in the casing of the speed reducer.

[Operation] When turning the erector, the brake is deactivated and the high-speed hydraulic motor is driven. The rotation of the output shaft of the hydraulic motor is transmitted to the drive pinion through the reducer,
Further, it is transmitted to the erector via the gear. In this way, the high-speed hydraulic motor is adopted, and the erector is driven to rotate through the speed reducer.Therefore, pulsation does not occur when the erector is rotated at a low speed, and the erector can be stably rotated at a very low speed. You can

When positioning the erector is stopped, the supply of hydraulic pressure to the hydraulic motor is stopped and the brake is activated. As a result, accurate positioning can be stopped and the stopped state can be maintained for a long time.

Further, since the brake is provided inside the casing of the speed reducer, dust etc. does not enter the brake, and it can be applied to a shield tunnel construction in which cement dust or water is splashed. Further, since the brake is provided on the output shaft of the high-speed hydraulic motor and the input shaft of the speed reducer, the dimension in the longitudinal direction can be shortened.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 3, the shield machine has an erector 1 for assembling segments along a tunnel excavated in a shield frame 2. This Electa 1
As shown in FIG. 1 and FIG. 3, the shield frame 2 is provided with an annular erector frame 4 which is rotatably supported in the shield frame 2 via a support roller 3 along its circumferential direction. In order to drive the erector 1 to rotate, an annular gear 8 is provided at the end of the erector frame 4 along the circumferential direction thereof, and a drive pinion 9 is meshed with the gear 8. The drive pinion 9 is connected to an output shaft 13 of a high speed hydraulic motor 12 via a speed reducer 14. Also,
The output shaft 13 of the hydraulic motor 12 is provided with a brake 15 for braking the output shaft 13. Specifically, as shown in FIG. 2, an input shaft 16 of a speed reducer 14 is connected to an output shaft 13 of the hydraulic motor 12, and the output shaft 13 and the input shaft 16 are connected to the output shaft 13 of the speed reducer 14. A hydraulic multi-plate brake 15 is provided in the casing 18. The output shaft of the hydraulic motor is also arranged inside the casing. Further, the speed reducer 14 includes a sun gear 17 attached to the input shaft 16, an internal gear 19 provided in a casing 18, and a first speed reducer including a planetary gear 20 meshing with these gears, and the planetary gear 20. Sun gear 2 provided on the carrier 2 via a carrier 21
2, an internal gear 23 provided in the casing 18, a second reduction gear portion composed of a planetary gear 24 meshing with these gears, a sun gear 26 provided on the planetary gear 24 via a carrier 25, a casing 18 Provided internal gear 27,
The multi-stage planetary gear device is provided with a third reduction gear unit consisting of a planetary gear 28 that meshes with these gears. The reduction gear output shaft 30 is connected to the planetary gear 28 of the third reduction gear unit via a carrier 29. A drive pinion 9 is attached.

Next, the operation of the embodiment will be described.

When turning the erector 1, the brake 15 is deactivated and the high-speed hydraulic motor 12 is driven. The rotation of the output shaft 13 of the hydraulic motor 12 is transmitted to the drive pinion 9 via the reduction gear 14, and further transmitted to the erector 1 via the gear 8. Since the high-speed hydraulic motor 12 is employed and the erector 1 is driven to turn through the speed reducer 14 in this manner, pulsation does not occur when the erector 1 is turned at a low speed, and the erector 1 is stabilized. You can make a fine turn.

When positioning the erector 1 is stopped, the supply of hydraulic pressure to the hydraulic motor 12 is stopped and the brake 15 is operated. As a result, the positioning can be accurately stopped and the stopped state can be maintained for a long time, so that the work can be performed safely.

For example, if the number of teeth of the drive pinion 9 is 15, the number of teeth of the gear 8 is 250, and the speed ratio of the speed reducer 14 is 1: 100,
In order to rotate the erector frame 4 at a rotation speed of 1.4 rpm (rated), the rotation speed of the high-speed hydraulic motor 12 is 1.4 × (250/15) × 100≈2333 rpm.

In order to rotate the erector frame 4 at a rotation speed of 0.1 rpm, the rotation speed of the high-speed hydraulic motor 12 is 2333 × (0.1 / 1.
4) .apprxeq.166 rpm, and the rotational speed of the high-speed hydraulic motor 12 itself is maintained at a high level, so that backflow of oil does not occur in the hydraulic motor 12 and the erector 1 can be stably rotated at a fine speed.

If the brake 15 is configured like the erector drive device of the present invention, the torque of the brake 15 is 1/1 less than the torque of the drive pinion 9 when the speed ratio of the speed reducer 14 is 1: 100.
A small torque brake that can be built in is provided.

Further, since the brake 15 is provided in the casing 18 of the speed reducer 14, dust in the tunnel does not enter the brake 15, and it can be applied to a shield tunnel construction in which cement dust or water is splashed. Further, since the brake 15 is provided on the output shaft 13 of the high-speed hydraulic motor 12 and the input shaft 16 of the speed reducer 14 and doubles as a joint, the output shaft 13 of the motor 12 and the input shaft 16 of the speed reducer 14 are also used. The dimension in the longitudinal direction can be shortened as compared with the case where the brake 15 is provided in the.

[Effects of the Invention] In summary, according to the present invention, the erector can be stably rotated at a fine speed, the positioning can be accurately stopped, the stopped state can be maintained for a long time, and the dust and water of the cement can be retained. The excellent effect of being able to provide an erector swivel drive device for a shield machine, which can be applied to such a shield tunnel construction and whose longitudinal dimension can be shortened, is exhibited.

[Brief description of drawings]

FIG. 1 is a side view showing an erector drive device according to the present invention,
FIG. 2 is a schematic side sectional view showing a main part of the erector drive device,
FIG. 3 is a side view showing an erector device, FIG. 4 is a side view showing a conventional erector drive device, and FIG. 5 is a line V-V in FIG.
6 is a sectional view taken along line VI-VI in FIG. In the figure, 1 is an erector, 2 is a shield frame, 8 is a gear, 9 is a drive pinion, 12 is a high-speed hydraulic motor, and 14
Is a speed reducer, and 15 is a brake.

Claims (1)

[Scope of utility model registration request] 1. An apparatus for pivotally driving an erector, which is rotatably supported in a shield frame along its circumferential direction and assembles segments into an excavation tunnel, wherein a gear is provided on the erector along its circumferential direction. A high-speed hydraulic motor, a speed reducer having an output shaft of the motor connected to an input shaft, and a reduction output shaft to which a drive pinion that meshes with the gear is attached; and a reduction gear inside a casing of the reduction gear. An erector swing drive device for a shield machine, comprising an output shaft of a high-speed hydraulic motor and a brake provided on an input shaft of a speed reducer.