JPH0327093Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a wheeled power swivel with an improved drive system.

BACKGROUND ART As a drive system for a conventional wheel-type power swivel, the one described in, for example, Japanese Utility Model Application Publication No. 140264/1983 is known. In the above power swivel, as shown in Fig. 4, the power of the engine b mounted on the upper rotating body a is transmitted to the suspension d via the rotating shaft c provided at the center of rotation, thereby driving the suspension d. The rotating upper structure a is rotated by a separately provided hydraulic motor e.

Problems that the invention aims to solve: Although the conventional power swivel described above is efficient because the suspension d is directly driven by the output of the engine b,
The output of engine b is transmitted around the suspension d via the rotating shaft c.
Due to this, there were some problems such as restrictions on the installation position of engine B etc.

This invention was made for the purpose of improving the above-mentioned problems.

Means and operation for solving the problem A pinion that rotates a circle via a swing clutch that uses the rotation of a hydraulic motor rotated by the discharge pressure of a hydraulic pump driven by an engine, a traveling clutch and a swing center provided A wheeled power swivel that enables the upper swing structure to turn and travel around the undercarriage using a single hydraulic motor, transmitting power to the undercarriage via the drive shaft.

Embodiment An embodiment of this invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 indicates a suspension that can move freely by wheels 2, and an upper rotating body 3 is provided on the suspension 1 so as to be able to rotate freely. There is. A working machine 4 and a driver's cab 5 are located at the front of the upper revolving body 3, and a power room 6 is located at the rear.
are respectively provided, and an engine 7 is housed in the power chamber 6.

A hydraulic pump 8 is connected to the output shaft of the engine 7, and is driven by the engine 7, and the hydraulic pressure discharged from the hydraulic pump 8 is transferred to an operating valve 9.
It is designed to be supplied to the hydraulic motor 10 via. The hydraulic motor 10 is installed above a circle 11 provided at the lower part of the upper revolving body 3, and drives a gear 12.
The gear 12 is housed in a gear case 13, and a swing clutch 15 is disposed between the upper end of the shaft 12a of the gear 12 and a pinion 14 that meshes with a gear (both not shown) provided on the inner race of the circle 11. is provided. In addition, the gear 12
A traveling clutch 17 is provided between the lower end of the shaft 12a and the gear 16, and the gear 16 is meshed with a gear 19 fixed to the upper end of a drive shaft 18 provided at the center of rotation of the upper revolving body 3. ing.

On the other hand, a bevel gear 22 that meshes with a bevel gear 21 fixed to an intermediate shaft 20 is fixed to the lower end of the drive shaft 18, and the front and rear ends of the intermediate shaft 20 are connected back and forth via a universal joint 23 and a power shaft 24. It is linked to wheel 2.

The swing clutch 15 and the traveling clutch 17 are hydraulic or electric clutches, and can be engaged and engaged by remote control from the driver's cab 5. Further, when the operation lever (not shown) is pushed forward, the running clutch 17 is connected and the vehicle travels, and when it is pushed back, the swing clutch 15 is connected and the upper swing structure 3 is turned. The structure is such that they are not connected at the same time.

Effects of the invention As detailed above, this invention is based on the hydraulic pump 8.
Since there is no need to lead the hydraulic pressure discharged from the engine 5 to the suspension 1 through the swivel joint, it is possible to obtain almost the same running performance as when the suspension 1 is directly driven by the output of the engine 5, and also to drive the suspension 1 directly with the output of the engine 5. Since one hydraulic motor 10 serves as the swing motor,
There is no need to provide a separate swing motor, and costs can be reduced. In addition, since the power of the engine 5 is converted into hydraulic pressure and transmitted to the hydraulic motor 10, problems such as restrictions on the installation position of the engine 5 are eliminated compared to conventional systems that transmit engine power to the suspension via a rotating shaft. be able to.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is an overall side view, Fig. 2 is a configuration diagram of the drive system, Fig. 3 is a detailed diagram of the drive system, and Fig. 4 is a conventional explanatory diagram. be. 1 is the suspension, 2 is the wheel, 3 is the upper rotating body, 7
1 is an engine, 8 is a hydraulic pump, 10 is a hydraulic motor, 11 is a circle, 14 is a pinion, 15 is a swing clutch, 17 is a travel clutch, and 18 is a drive shaft.

Claims (1)

[Scope of utility model registration request] In a wheeled power shovel in which an upper revolving body 3 on which an engine 7 is mounted is rotatably provided on an undercarriage 1 that runs on wheels 2, a hydraulic pump 8 rotated by the engine 7 is provided on the upper revolving body 3 side. , a hydraulic motor 10 rotated by the discharge pressure of the hydraulic pump 8, and a swing clutch 15 that transmits the rotation of the hydraulic motor 10 to a pinion 14 meshing with a gear of a circle 11 provided at the lower part of the upper revolving structure 3. , a traveling clutch 17 is provided for transmitting the rotation of the hydraulic motor 10 to the suspension 1 via a drive shaft 18 provided at the center of rotation, and the power transmitted to the suspension 1 via the drive shaft 18 A wheeled power swivel that drives the suspension 1.