JPH074137U - Bulldozer horizontal shaft gear coupling - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the attachment and detachment of gear couplings from the outside of the frame. A gear coupling 5 for connecting a horizontal shaft 2 of a horizontal shaft device 1 and a torque shaft 4 of a final reduction gear device 3 to the horizontal shaft device 1 is provided.
Is provided on the outside of the frame 6 for supporting. [Effect] The width of the frame itself can be narrowed, so that the frame becomes compact and the manufacturing cost can be significantly reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connecting portion between a horizontal shaft device of a bulldozer and a final reduction device, and more particularly to a gear coupling of the horizontal shaft device of a bulldozer.

[0002]

[Prior art]

 In general, the power system of a bulldozer is such that the power from the engine is transmitted to the transmission via a clutch or torque converter, etc. It is transmitted to the torque shaft between the final reduction gear and the final reduction gear transmission through the steering clutch and the steering brake from the horizontal shaft. In addition, the vehicle can be moved by rotating the crawler track on the sprocket. In this case, a gear coupling is used at the joint between the horizontal shaft device and the final reduction gear to transmit power.

[0003]

[Problems to be solved by the device]

 However, as shown in the plan view of FIG. 8, the engine 31 is arranged in the front part, the transmission 32 and the horizontal shaft case 33 are arranged in the rear part, and the gear couplings are arranged on the left and right outside of the horizontal shaft case 33. Since the gear couplings 34 are provided, the rear portion of the frame 35 supporting them is provided with the gear coupling 34 inside, so that the width thereof is the space of both the horizontal case 33 and the gear coupling 34. However, the gear coupling 34 is provided outside the frame 35 as shown in FIG. However, there is a problem that it is impossible to attach and detach, and therefore the cost is high. In FIG. 9, 37 is a horizontal axis and 38 is a torque axis of the final reduction gear 36.

In view of this, the present invention provides a final reduction device for a bulldozer, which facilitates the attachment / detachment of the gear coupling from the outside of the frame and enables a significant cost reduction. The purpose was to eliminate the drawbacks of the.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention is characterized in that a gear coupling that connects the horizontal shaft of the horizontal shaft device and the torque shaft of the final reduction gear device is provided outside the frame supporting the horizontal shaft device. And

[0006]

[Action]

 According to the above configuration, the gear coupling is provided outside the frame that supports the horizontal shaft device.Therefore, by removing the gear coupling to the final reduction gear side, the gear coupling is separated from the horizontal shaft device during disassembly and assembly. It can be easily attached to and detached from the frame.

[0007]

【Example】

 FIG. 1 is a cross-sectional view of a gear coupling of an embodiment of a horizontal shaft device for a bulldozer according to the present invention seen from the rear (left side with the right side omitted), and FIGS. 2 to 6 are horizontal axes of the gear coupling. FIG. 7 is a left side view showing the disassembly and reassembly of the apparatus, and FIG. 7 is a plan view showing the relationship between the frame and the power mechanism according to the present invention.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 7. In the present invention, a gear coupling 5 that connects the horizontal shaft 2 of the horizontal shaft device 1 and the torque shaft 4 of the final reduction gear device 3 is provided outside the frame 6 that supports the horizontal shaft device 1. .

The horizontal shaft device 1 is mounted between the frames 6 on both sides, and is provided so that the end surface of the horizontal shaft 2 is accommodated in the horizontal shaft case 7. Further, a hub 9 is externally fitted to a spline 8 on the outer periphery of the horizontal shaft 2 facing the final speed reducer 3 side, and the hub 9 and the horizontal shaft 2 are fastened together by a bolt 11 via a washer 10 to be integrated. Has become. An external gear with crowning is formed on the outer periphery of the hub 9. On the other hand, the case 12 of the final reduction gear unit 3 is fastened to the outside of the frame 6, and the torque shaft 4 faces the horizontal shaft 2 of the horizontal shaft device 1 and is inside the case 12. It is designed to fit. A hub 14 is externally fitted to a spline 13 provided on the outer periphery of the torque shaft 4 facing the horizontal shaft 2 side, and the hub 14 and the torque shaft 4 are fastened together by a bolt 16 via a washer 15 to be integrated. Has become. Similarly, the outer periphery of the hub 14 is formed as a crowned external gear. Ring gears 17 that mesh with the external gears of the hubs 9.14 are provided, and covers 18 and 19 are provided on both sides of the ring gear 17, respectively. The cover 18, the ring gear 17, and the cover 19 pass through the hole of the ring gear 17 from the bolt hole of the cover 18 on one side to reach the screw hole of the cover 19 on the other side. It is tightened by and is integrated. An O-ring 21 for sealing the oil in the gear coupling 5 is provided between the cover 18 and the hub 14 and between the cover 19 and the hub 9. Further, a bolt 22 which is always integrated is provided between the cover-18 and the ring gear 17. An integral pinion is formed on the torque shaft 4, and a deceleration gear 23 meshes with the pinion so that the rotation of the torque shaft 4 is reduced by the reduction gear 23.

Next, disassembly and reassembly of the gear coupling will be described with reference to FIGS. 2 to 6. FIG. 2 shows a state before disassembly, in which the plug 25 is removed and the oil therein is drained. To disassemble, as shown in FIG. 3, remove the cover 24 of the final reduction gear case 12 and loosen the bolt 20 with a tool from the hole to remove the tightening between the hub 9 and the ring gear 17, and remove the ring. The gear 17 is moved to the left in the figure. In the figure, 26 is a stopper that prevents the bolt 20 from falling inward. The hub 14 and the ring gear 17 are integrated by a bolt 22. When the bolt 20 is unfastened as described above, the horizontal shaft device 1 is no longer connected to the final reduction gear 3, and a gap is created between the horizontal shaft device 1 and the frame 6, so that the horizontal shaft device 1 remains as it is. Can be taken from. As a result, the clutch, the brake or the like can be attached or detached, or the final reduction gear 3 can be attached or detached by this detachment. FIG. 4 shows the case of reassembly. The bolt 20 is screwed in while looking at the screw hole on the hub 9 side, and then the gear is meshed. In this case, however, since the teeth on the hub 9 side are crowned, the meshing is easy, and even if some misalignment occurs between the horizontal shaft 2 and the torque shaft 4 during rotation, there is no problem with the torque. Communication is possible. FIG. 5 shows a state where the bolt 20 of FIG. 4 is being tightened by the tool 27, and FIG. 6 shows a state where the tightening is completed and oil is added.

FIG. 7 shows a state in which the rear portion of the frame 6 has the same width as the front portion because the gear coupling 5 is provided outside the frame 6 according to the present invention. The reference numerals of the engine and the transmission are the same as those of FIG. 8 in order to facilitate comparison with the conventional FIG.

[0012]

[Effect of device]

 As described above, in the present invention, the gear coupling that connects the horizontal shaft of the horizontal shaft device and the torque shaft of the final reduction gear is provided outside the frame supporting the horizontal shaft device. The ring can be attached and detached from the outside of the frame, and the frame itself can be narrowed in the left-right width, resulting in a compact size and a significant reduction in manufacturing cost.

[Brief description of drawings]

FIG. 1 is an explanatory view of a cross section viewed from the back side showing an embodiment of a gear coupling of a horizontal shaft speed device for a bulldozer according to the present invention.

FIG. 2 is an exploded view of the gear coupling of FIG.
It is explanatory drawing of the state which shows each process at the time of reassembling.

[FIG. 3] The gear coupling of FIG. 1 is disassembled from the horizontal shaft device.
It is explanatory drawing of the state which shows each process at the time of reassembling.

FIG. 4 is an exploded view of the gear coupling of FIG.
It is explanatory drawing of the state which shows each process at the time of reassembling.

5] The gear coupling of FIG. 1 is disassembled from the horizontal shaft device.
It is explanatory drawing of the state which shows each process at the time of reassembling.

FIG. 6 is an exploded view of the gear coupling of FIG.
It is explanatory drawing of the state which shows each process at the time of reassembling.

FIG. 7 is an explanatory plan view showing the relationship between the frame and the power mechanism of the present invention.

FIG. 8 is an explanatory plan view showing a relationship between a conventional frame and a power mechanism.

FIG. 9 is an explanatory diagram showing a cross section of a conventional final reduction device for a bulldozer.

[Explanation of symbols]

 1 Horizontal Axis Device 2 Horizontal Axis 3 Final Reduction Gear 4 Torque Shaft 5 Gear Coupling 6 Frame

Claims (1)

[Scope of utility model registration request] 1. A bulldozer, characterized in that a gear coupling for connecting a horizontal shaft of the horizontal shaft device and a torque shaft of the final reduction gear device is provided outside a frame supporting the horizontal shaft device. Horizontal shaft gear coupling.