JPS6134184Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a speed reduction device that includes a plurality of planetary gears interposed between a sun gear connected to an axle and an internal gear fixed to an axle case, so that the speed reduction device can be freely rotated on the axle. provided in a case attached to said case,
The present invention relates to a running device for a working vehicle, which connects tire axles with bolts, fits the support shaft of the planetary gear, and includes means for preventing the support shaft from slipping out and preventing rotation.

Conventionally, as a traveling device for this type of work vehicle, as disclosed in Japanese Patent Application Laid-Open No. 49-62852, a support shaft of a planetary gear is press-fitted into a case to which a reduction gear is attached, and the outer shaft of the support shaft is connected to the case. A structure is disclosed in which a bolted lid forming a part of the support shaft is pressed from the outside in a state in which the notch of the support shaft is fitted to prevent it from coming out and preventing rotation. In this configuration, it is necessary to press-fit the spindle into the case in order to prevent the spindle from coming out, which requires strict machining accuracy and a large number of machining processes. This leaves internal stress on one side of the case, which poses a disadvantage in terms of fatigue strength.Furthermore, if this press fit loosens over a long period of time, the lubricating oil in the case becomes weak. There was a drawback that leakage occurred between the shaft and the case. Furthermore, since the large number of bolts connecting the tire wheels to the case are exposed to the outside, there is a drawback that they are easily abraded by stones, dirt, and the like.

The technical problem that this invention aims to solve is to prevent foreign objects such as stones and sand from hitting important bolts such as tire wheel connection bolts, even with the addition of a simple structure, and to prevent the important bolts from being damaged. The purpose is to make it possible to easily confirm the influence from the outside even if the

The technical means developed to solve the above technical problem is to protect the bolt that connects the key plate to the case, which is a means for preventing the support shaft from slipping out and preventing rotation, and the connecting bolt of the tire wheel. The cover is connected to all of the support shafts with bolts, and a gap is provided over almost the entire circumference between the outer circumferential edge of the protective cover and the circumferential edge of the time rim.

The above technical means works as follows. Since the protective cover is connected to all of the support shafts with bolts, the key plate connection bolts and the tire wheel connection bolts, which are important bolts, are not directly exposed to the outside.

Since a gap is provided between the outer circumferential edge of the protective cover and the tire rim circumferential edge, the inner side of the tire rim and the outer surface of the case can be visually observed through this gap.

Therefore, the present invention has the following effects. Since the key plate connecting bolts and the tire wheel connecting bolts, which are important bolts, are not directly exposed to the outside, it is possible to avoid wear and tear on the connecting bolts due to stones and dirt over a long period of time, and the tire wheels and key It has now become possible to easily disassemble and assemble plates.

In addition, since the inside of the tire rim and the outside of the case can be seen through the gap around the protective cover, even if the key plate connecting bolt breaks, it can be easily confirmed just by looking from the outside, making the overall configuration extremely useful. did it.

Next, embodiments of the present invention will be described in detail based on the drawings.

A driving unit 3 is mounted on the front part of a traveling vehicle body 2 equipped with tire wheels 1, and on both sides of this driving unit 3, a pair of left and right arms 5, 5 each having a bucket 4 at the tip can be freely swung up and down. In addition to providing the above-mentioned traveling vehicle body 2
At the rear of the vehicle, an excavation work device 6 that can swing from side to side and swing from side to side is detachably attached, and a boarding seat 7 that can be changed forward and backward is provided between the rear wheels 1 and 1, and a seat for controlling the vehicle body and a bucket seat are provided. A control unit 8 for a working device and a control unit 9 for an excavation device,
The work vehicle is arranged in front and behind the seat 7 to perform excavation work and scooping and transporting work.

To configure the drive device for the tire wheel 1, as shown in FIG. A case 14 is connected to the left and right axles 13 which are interlocked with each other, and a multi-plate brake 15 is provided between the axle case 14 and the axle 13. The case 16, which is bolted together in the axial direction, is rotatably mounted, and the case 16 and the axle 13 are interlocked and connected to the planetary gear type reduction gear 1.
7 is housed inside the case 16, and the tire wheel 1 is connected to the case 16 with a bolt 18 via the disk 1a.

To configure the speed reduction device 17, as shown in FIG. 2, a sun gear 19 is integrally molded on one end side of the axle shaft 13, an internal gear 20 is fixed to one end side of the axle case 14, and this internal gear A plurality of planetary gears 21 are interposed between 20 and the sun gear 19, and a support shaft 22 that rotatably supports the planetary gears 21 is fitted and held in the case 16 via a sealing material 23. let, and
A key plate 24 that fits into a notch a formed on the outer end side of the support shaft 22 and comes into close contact with the outer end surface of the bulged portion 16a of the case 16 to prevent the support shaft 22 from coming off and rotating; Connected to the case bulge 16a by bolts 25, 25, and
As the axle 13 rotates, the case 16 is decelerated and revolved around the axle 13.

In order to protect the connecting bolts 18..., 25... of the tire wheel 1 and the key plate 24 to the case 16 from stones and dirt, a relatively thin disc-shaped cover 26 is detachably attached to all of the support shafts 22. are connected with bolts 27.

The cover 26 covers the rim 1 of the tire wheel 1.
The key plate connecting bolt 25 has a diameter slightly smaller than the inner circumferential diameter on the outer side of the key plate connecting bolt 25,
An outwardly protruding portion b is formed in a portion corresponding to the cover 25 to protect the connecting bolts 18 and 25 from rocks and dirt, and to remove dirt and the like that have entered the cover 26. Outer edge and rim 1b
It is designed to be excluded from a gap extending all the way around the inner circumferential surface of the.

And the connecting bolt 25 of the key plate 24,
25 is damaged, the support shaft 22 comes off and the cover 26 is bent while being fixedly held by the other support shafts 22..., and in the event of an accident, it can be easily prevented from outside the cover 26. This is so that you can check it.

The cover 26 of the present invention can be installed on various types of work vehicles, such as construction vehicles such as shovels and agricultural vehicles such as tractors.

Further, the cover 26 can be made of various materials such as synthetic resin and relatively hard rubber.

[Brief explanation of drawings]

The drawings show an embodiment of the traveling device for a working vehicle according to the present invention, with FIG. 1 being an overall side view of the working vehicle, and FIG. 2 being a partial vertical sectional plan view of the driving device. 1... Tire wheel, 13... Axle, 14... Axle case, 16... Case, 17... Speed reduction device,
18, 25, 27... Bolt, 19... Sun gear, 20... Internal gear, 21... Planet gear, 22... Support shaft, 24... Key plate, 26
……cover.

Claims (1)

[Scope of utility model registration request] Sun gear 19 and axle case 1 connected to the axle 13
A reduction gear device 17 comprising a plurality of planetary gears 21 interposed between an internal gear 20 fixed to
is rotatably attached to the axle 13.
6, the tire wheel 1 is connected to the case 16 with bolts 18, and the planetary gear 2 is connected to the case 16 with bolts 18.
1...'s support shaft 22... is fitted, and the support shaft 22...
In the traveling device for a work vehicle, the bolt 25 connects a key plate 24, which is a means for preventing the support shaft 22 from slipping out and rotating, to the case 16. , the connecting bolt 18 of the tire wheel 1...
A cover 26 for protecting the tire rim 1b is connected to all of the support shafts 22 with bolts 27, and a gap is provided almost all around the circumference between the outer circumferential edge of the protective cover 26 and the circumferential edge of the tire rim 1b. A traveling device for a work vehicle featuring: