JPS604007B2 - hydraulic transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in hydraulic transmission devices used in construction machines such as bulldozers, track shovels, and crawler drills.

To explain the conventional hydraulic transmission device with reference to FIG. 1, a is an engine, b is a splitter that divides the engine output into two hydraulic pumps c, c, and d, d are hydraulic pumps c, c and hydraulic motors e, e. f is the steering case, g and g are the final reduction gears that have the input shafts attached to the motors e and c, and the output shafts attached to the sprocket h. After the signal is divided into two parts, the signal is transmitted to hydraulic pumps c and c, and each hydraulic pump c is driven.

Further, hydraulic fluid discharged from each hydraulic pump c is sent to hydraulic motors e and e through hydraulic hoses d and d, and the hydraulic motors e are driven. Further, the rotation of each hydraulic motor e is transmitted to sprockets h and h' via final reduction gears g and g, so that the vehicle runs. In the hydraulic transmission device, (1) the splitter b and the hydraulic pumps c, c are separately arranged on the engine a side, and the hydraulic motors e, e on the steering case f side, making assembly, maintenance, and inspection troublesome. Moreover, it is difficult to apply it to various types of chamari.

(0) Hydraulic pumps c, c and hydraulic motors c, e are connected by hydraulic hoses d, d with a large bending radius,
A large space is required between the engine a and the steering case f, making it difficult to make it compact. (m) Hydraulic hoses d, d that can withstand high pressure are required, resulting in high costs. (N)
Since the splitter b, the hydraulic pumps c, c, and the hydraulic hoses d, d are directly affected by the vibrations of the engine a, there is a problem in that these parts, especially the hydraulic hoses d, are damaged early. The present invention addresses the above-mentioned problems, and includes a hydraulic pump driven by an engine via a universal joint, a hydraulic motor driven by hydraulic oil from the hydraulic pump, and an input shaft mounted on the hydraulic motor. and a final reduction gear in which an output shaft is attached to an axle, a splitter is interposed between the universal joint and the hydraulic pump, and the splitter and the hydraulic pump are housed in a hydraulic motor chamber housing the hydraulic motor. and a gear chamber that accommodates the final reduction gear; the hydraulic transmission device is mounted on the external front surface of a steering case partitioned into a gear chamber housing the final reduction gear, and the hydraulic pump and the hydraulic motor are connected by a steel pipe; The object of the present invention is to provide an improved hydraulic transmission device that can not only achieve the above effects but also impart durability to the splitter, the hydraulic pump, the pipe members connecting the hydraulic pump and the hydraulic motor, and the like.

As described above, the hydraulic transmission device of the present invention includes a hydraulic pump driven by an engine via a universal joint, a hydraulic motor driven by hydraulic oil from the hydraulic pump, and an input ball to the hydraulic motor. , a hydraulic transmission device comprising an output shaft and a final reduction gear each mounted on an axle, a splitter is interposed between the universal joint and the hydraulic pump, and the splitter and the hydraulic two-pressure pump are connected to the hydraulic The hydraulic pump and hydraulic motor are connected by a steel pipe, and the hydraulic pump and hydraulic motor are connected to each other by a steel pipe. The pipe member between the engine and the engine can be made stronger, and the splitter, hydraulic pump, pipe section, hydraulic motor, and final reduction gear are placed on the steering case side, which is not directly affected by engine vibrations. It can be moved and can impart durability to spritzers, hydraulic pumps, pipe members connecting hydraulic pumps and hydraulic motors, and the like.

Next, the hydraulic transmission device of the present invention will be explained with reference to an embodiment shown in FIGS. 2 to 8. In FIG. Each hydraulic pump 4 is attached to the external front surface of the steering case 6.

2 is a universal joint connecting the engine 1 and the splitter 3; 7 is a hydraulic motor chamber formed within the steering case 6; 8 is a gear chamber formed within the steering case 6; 5, 5 is a hydraulic motor housed in the same hydraulic motor chamber 7 and connected to the above-mentioned hydraulic pump 4, 4 via a steel pipe (not shown); 9, 9 is a final reduction gear, a part of which is connected to each of the above-mentioned gears. In the chamber 8, the remaining parts are arranged on the sides of the bare case 6, and the input shafts are connected to the hydraulic motors 5, 5.
In addition, output balls are attached to sprockets 10, 10, respectively. Further, details of each of the above-mentioned parts are shown in FIGS. 3 to 8. As shown in FIGS. 3 and 5, the tip of the universal joint 2 is attached to the gear 11 of the splitter 3. Further, gears 12, 12 of the splitter 3 meshed with the gear 11 are attached to the input koji of the hydraulic pump 4 via splines. Further, as shown in FIGS. 6 and 7, the gear 13 is connected to the hydraulic motor 5.
It is attached to the output shaft of the motor via a spline. A gear 14 meshed with the gear 13 is attached to the input shaft of the final reduction gear 9 via a spline. Also the 4th, 6th, 7th
15 shown in the figure is a brake device, and the brake device 15 is supported by shafts 20, 20 attached to the steering case 6 and the boss of the gear 13, and can move in the direction of the bag line, but cannot rotate. The capital material 16a and the above gear 13 that cannot be
The cam 16, which is made up of the other material 16b and 0, which can be moved and rotated in the mari line direction by being moved only by the post, and the cam 16, which is made of the other material 16b and 0, is moved by the shafts 20 and the bosses of the gears 13, and is moved in the axial direction. A plurality of brake plates 17a that can be moved but cannot be rotated, and each brake plate 17a
A plurality of disks 17b fixed to the boss of the gear 13 so as to be located between the shaft 19 and the shaft 19 rotatably attached to the steering case 6, and the shaft 19 and the member 16b are connected. It is composed of a link 18,
When the brake pedal (not shown) is stepped on, the shaft 19 rotates, the link 108 is pulled, the capital member 16b rotates, and the oka member 16b moves to the part 16a opposite to the part 16b.
The brake plate 17a and the disc 17b are pressed against each other by the peaks and valleys provided in the brake plate 17a and the disc 17b, thereby stopping the gears 13, 14, the final reduction gear 9, and the sprocket 10. . Note that 21 in Figures 3, 4, and 5
is a mounting portion for mounting the steering case 6 to a vehicle chassis frame (not shown). Next, the operation of the hydraulic transmission device will be explained.

The output of engine 1 is transmitted through universal joint 2 to 0sp IJ vine 3
After being transmitted to and divided into two parts, it is transmitted to hydraulic pumps 4, 4, and each hydraulic pump 4 is driven. Further, hydraulic fluid discharged from each hydraulic pump 4 is sent to hydraulic motors 5, 5 through steel pipes (not shown), and the hydraulic motors 5 are driven. Further, the rotation of each hydraulic motor 5 is transmitted to the subrocket via the gears 13, 14 and the final reduction gear 9, and the vehicle runs. Further, when the brake pedal is stepped on, the brake device 15 is activated and the gears 13, 14, final reduction gear 9, and sprocket 10 are stopped. Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a subordinate hydraulic transmission device, FIG. 2 is an explanatory diagram showing an embodiment of the transmission device according to the present invention, and FIG. 3 is a cross-sectional plan view showing an enlarged diamond part thereof. Fig. 4 is a front view thereof, Fig. 5 is a side view thereof, Fig. 6 is an enlarged cross-sectional plan view showing the brake device installed between the hydraulic motor and the final reduction gear, and Fig. 7 is the same brake device. FIG. 8 is a cross-sectional plan view showing a cam plate used in the brake device. 1...engine, 2...universal joint, 3...splitter, 4...
- Hydraulic pump, 5... Hydraulic motor, 6... Steering case, 7... Hydraulic motor room, 8... Gear room, 9...
Final reduction gear. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 8

Claims (1)

[Claims] 1 A hydraulic pump driven by an engine via a universal joint, a hydraulic motor driven by hydraulic oil from the hydraulic pump, and a final reduction gear in which an input shaft is attached to the hydraulic motor and an output shaft is attached to an axle. a splitter is interposed between the universal joint and the hydraulic pump, and the splitter and the hydraulic pump are provided in a hydraulic motor chamber that accommodates the hydraulic motor and a gear chamber that accommodates the final reduction gear. A hydraulic transmission device, which is attached to the external front of a divided steering case, and is characterized in that a hydraulic pump and a hydraulic motor are connected by a steel pipe.