JPH0591944U - Mounting structure for traveling motor for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] In the conventional traveling motor mounting structure, the hydraulic pipe connection port surface of the brake valve attached to the traveling motor is mounted horizontally or vertically. Therefore, the main hydraulic oil supply / discharge hydraulic pipe is provided with bent portions in front of and behind the motor housing mounting plate. The hydraulic pipe had an unreasonable bent shape, and it was unsatisfactory in production and maintenance. The present invention aims to solve the above problems. [Structure] In the structure for mounting the traveling motor of the present invention, the turning joint located at a position higher than the traveling motor and the bent portion of the hydraulic pipe communicating with the traveling motor are minimized so that the cutout hole of the motor housing mounting plate is formed. The port surface for hydraulic pipe connection on the travel motor side was mounted with a tilt in the front-rear direction so that the parts could be arranged to pass through.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for mounting a traveling motor mounted on a lower traveling body of a construction machine such as a crawler hydraulic excavator.

[0002]

[Prior Art]

 FIG. 2 is a perspective view showing a main assembly structure of a crawler frame 1 of a lower traveling body for a hydraulic excavator (not shown). In the figure, 2L and 2R are left and right track frames of the crawler frame 1, and 3 is a motor housing mounting plate welded to the rear portions of the track frames 2L and 2R, respectively. Since the structures of the rear portions of the track frames 2L and 2R are configured to be symmetrical to each other, the side of the track frame 2R will be described as a representative example. Reference numeral 4 is a cutout hole formed in the motor housing mounting plate 3, 5 is a motor housing, 6 is a motor mounting plate of the motor housing 5, 7 is a traveling motor, and 8 is a brake valve attached to the traveling motor 7 ( Also referred to as a counter balance valve), 9 and 9 are main pressure oil supply / discharge pipes that communicate with the traveling motor 7, 10 are pilot pipes, 11 is drain pipes, 12 is clamp fittings, 13 is a cover plate, 14 is a washer, and 15 is The tightening bolt and 16 are swivel joints. 3 is a sectional view taken along the line AA of FIG. In the figure, 17 and 17 'indicate the hydraulic-pipe connecting port surface of the brake valve 8, and HL indicates a horizontal line. FIG. 4 is a sectional view taken along the line BB of FIG. In the figure, 18 is a starting wheel that is fastened to the rotary drum 19 of the traveling motor 7, 20 is a fastening bolt that fastens the traveling motor 7 to the motor mounting plate 6, and phantom line a is a crawler.

Next, a mounting structure of the conventional traveling motor 7 will be described with reference to FIGS. In the conventional technology, the motor housing 5 is fixed to the rear portion of the crawler frame 2R of the lower traveling body 1, the traveling motor 7 is attached to the motor mounting plate 6 of the motor housing 5, and the hydraulic pressure is provided between the swivel joint 16 and the traveling motor 7. Piping (9, 9, 10, 11) is arranged. In the above structure, the motor housing mounting plate 3 is welded to the rear portion of the track frame 2R so that the plate thickness direction is in the left-right direction, and the cutout holes are provided for the hydraulic pipes (9, 9, 10, 11) to pass through. The part 4 is formed. The hydraulic pipes (9, 9, 10, 11) passing through the cutout holes 4 are fastened and fixed by the clamp fittings 12 in front of the motor housing mounting plate 3. 2 to 4, steel pipes are used for the hydraulic pipes (9, 9, 10, 11), but a hydraulic hose (not shown) is provided without using the steel pipes. Some are.

[0004]

[Problems to be solved by the device]

 In the conventional mounting structure for the traveling motor 7, the hydraulic pipe (9, 9) connection port surfaces 17, 17 'of the brake valve 8 attached to the traveling motor 7 are installed in a horizontal (HL) state as shown in FIG. There is. Therefore, the main hydraulic oil supply / discharge hydraulic pipes 9 and 9 are provided with a plurality of bent portions (portions B, C, D, and E shown in FIG. 3) in front of and behind the motor housing mounting plate 3. There is. Since the bending shapes of the hydraulic pipes 9 and 9 are complicated and the bending process requires a considerable amount of time and labor, the processing cost was high. There is also one in which the port surface for hydraulic pipe connection on the traveling motor 7 side is mounted vertically (not shown), but since the mounting position of the swivel joint 16 is diagonally above the traveling motor 7, the hydraulic piping (hydraulic hose However, the shape was unreasonable, and the shape was unfavorable in terms of production and maintenance. The present invention aims to solve the above problems.

[0005]

[Means for Solving the Problems]

 In the structure for mounting the traveling motor of the present invention, the turning joint located at a position higher than the traveling motor and the bent portion of the hydraulic pipe communicating with the traveling motor are minimized to minimize the notch hole portion of the motor housing mounting plate. The port surface for hydraulic pipe connection on the drive motor side was mounted with a tilt in the front-rear direction so that it could be placed through.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the main parts of a crawler frame 1'which shows the mounting structure of the present invention. In the figure, 2'R is a track frame on the right side of the crawler frame 1 '(the left side is symmetrical, so only the right side will be described), 3'is attached to the rear of the track frame 2'R, and is attached to the motor housing. Plate, 4'is a cutout hole formed in the motor housing mounting plate 3 ', 5'is a motor housing, 6'is a motor mounting plate for the motor housing 5', 7'is a traveling motor, 8'is a traveling motor 7 Brake valves attached to ', 21 and 21 are main pressure oil supply / discharge pipes (using hydraulic hoses) leading to the traveling motor 7', 10 'are pilot pipes, 11' are drain pipes, 16 ' Is a turning joint, 22 is a port surface for connecting hydraulic pipes of the brake valve 8 ', 0 is a rotation center of the traveling motor 7', HL is a horizontal line, and VL is a vertical line.

Next, the mounting structure of the present invention will be described with reference to FIG. The bend of the hydraulic pipes (21, 21, 10 ', 11') communicating with the swivel joint 16 'located at a position higher than the traveling motor 7'and the traveling motor 7'is minimized as much as possible. The hydraulic pipe connection port surface 22 of the brake valve 8'of the traveling motor 7'is inclined in the front-rear direction (vertical line VL as shown in FIG. 1) so that the cutout hole 4'of the attached plate 3'can be disposed. With respect to the front and back by an angle a).

Next, the operation of the mounting structure of the present invention will be described. In the brake valve 8'of the traveling motor 7'in the embodiment of the present invention, a single port face 22 is formed as a hydraulic pipe connecting port face, and the hydraulic pipe connecting port face 22 is inclined at an angle a in the front-rear direction. Since the traveling motor 7'is attached, the hydraulic pipe connection port surface 22 is in a substantially face-to-face state with respect to the direction of the swivel shoin 16 'disposed obliquely above, as shown in FIG. .. Therefore, when the main pressure oil supply / discharge pipes 21 and 21 are connected directly to the hydraulic pipe connection port surface 22, the hydraulic pipes 21 and 21 are connected to the cutout hole portion 4 of the motor housing mounting plate 3 '. The area before and after passing through'is quite long and almost linear. Moreover, the hydraulic pipes (21, 21, 10 ', 11') all have a small number of bent portions and have a gentle bend or curve. Therefore, the flow path resistance of the hydraulic pipe can be reduced, and the opening area of the cutout hole portion 4'of the motor housing mounting plate 3'can be minimized to improve the strength of the crawler frame 1 '.

[0009]

[Effect of the device]

 In the conventional traveling motor mounting structure, the hydraulic valve connecting port surface of the brake valve attached to the traveling motor is mounted horizontally or vertically. For this reason, the main hydraulic pressure supply / discharge hydraulic pipe is provided with a plurality of bent portions in front of and behind the motor housing mounting plate. In addition, the mounting position of the swivel joint that communicates with the drive motor is diagonally above, so the hydraulic piping had an unreasonable bent shape, which was unsatisfactory in terms of production and maintenance. However, in the mounting structure of the present invention, the turning joint located at a position higher than the traveling motor and the bent portion of the hydraulic pipe communicating with the turning motor are passed through the cutout hole portion of the motor housing mounting plate with as few bends as possible. In order to be able to arrange, the port surface for hydraulic pipe connection on the travel motor side was installed with the front and rear inclined. As a result, the hydraulic-pipe connecting port surface on the travel motor side is brought into a substantially face-to-face state with respect to the direction of the swivel joint which is arranged at an obliquely upper position. Therefore, if the main pressure oil supply / discharge pipe is connected in a state orthogonal to the hydraulic pipe connection port surface, the area before and after the hydraulic pipe passes through the notch hole in the motor housing mounting plate is fairly long and almost linear. Becomes Moreover, all hydraulic pipes have few bends and have gentle bends or bends. Accordingly, the flow resistance of the hydraulic pipe can be reduced, and the opening area of the cutout hole portion of the motor housing mounting plate 3'can be minimized to improve the strength of the crawl frame. Therefore, the traveling motor mounting structure of the present invention can reduce the bending cost of the hydraulic pipe in the case of the steel pipe, and can improve the maintainability and the assembling work of the hydraulic pipe.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a crawler frame showing a traveling motor mounting structure of the present invention.

FIG. 2 is a perspective view showing a main assembly structure of a crawler frame of a lower traveling body for a hydraulic excavator.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1,1 'Crawler frame 2L, 2R, 2'R Track frame 3,3' Motor housing mounting plate 4,4 'Notch hole part 6,6' Motor mounting plate 7,7 'Travel motor 8,8' Brake valve 9,21 Main pressure oil supply / discharge piping 16,16 'Swivel joint 17,17', 22 Hydraulic piping connection port surface

Claims (1)

[Scope of utility model registration request] 1. A motor housing is fixedly provided at a rear portion of a crawler frame of a lower traveling body, a traveling motor is attached to a motor mounting plate of the motor housing, and a hydraulic pipe is arranged between a swing joint and the traveling motor. In the existing construction machine, the swing joint located at a higher position than the traveling motor and the bent portion of the hydraulic pipe communicating with the traveling motor can be arranged as small as possible so as to pass through the notched hole portion of the motor housing mounting plate. A construction motor mounting structure for a construction machine, characterized in that the mounting surface of the hydraulic motor connection port on the traveling motor side is inclined in the front-rear direction.