JPH0534366Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention mainly relates to the structure of a swing reduction gear for construction machinery.

Prior Art FIG. 6 is a side view of a hydraulic excavator. In the figure, 1 is an upper rotating structure, 2 is a lower traveling structure, and 3 is a rotating device. FIG. 7 is a sectional view of a main part of the turning device 3. In the figure, 4 is a swing bearing, 5
is the internal gear of the swing bearing 4, 6 is the swing motor, 7 is the swing reducer, 8 is the pinion shaft, and 9 is the pinion shaft 8.
A pinion 10 at the lower end is a base plate of the upper revolving body 1. FIG. 8 is a sectional view of a conventional swing reduction gear 7. As shown in FIG. In the figure, 11 is a housing body, 12
13 is a ring gear body, 13 is a reduction gear mechanism, 14 is an upper bearing, 15 is a lower bearing, 16 and 17 are upper and lower bearings 14 and 1 of the housing body 11, respectively.
5, 18 is a sealing member, and 19 is a retainer.

Next, the structure of the conventional swing reduction gear 7 will be described. Upper and lower locking portions 16 and 17 are provided on the inner circumference of the housing body 11, and the locking portions 16 and 17
Upper and lower bearings 14 and 15 are respectively fitted to support the pinion shaft 8. So,
When removing the pinion shaft 8, upper and lower bearings 14, 15, seal member 18, retainer 19, etc. from the housing body 11, they are all pulled out toward the bottom of the housing body 11.

Problems to be Solved by the Invention In conventional swing reducers, when removing the pinion shaft, upper and lower bearings, and seal members that are assembled inside the gear, all of them are pulled out toward the bottom of the housing body. However, below the swing reducer to which the upper rotating body is attached, there is a grease bath portion on the upper surface side of the lower traveling body. For this reason, it is not possible to pull out the pinion shaft, sealing member, etc. downward, so when checking the inside of the swing reducer or making small repairs, the swing reducer with the swing motor must be lifted upward and removed. . This work requires a great deal of effort and time, as it requires loosening and removing the tightening bolts of the swing reducer that are fastened to the upper revolving structure, and also removing all piping connected to the swing reducer with swing motor. Was.

The object of this invention is to improve the above-mentioned problems and provide a structure of a swing reduction gear that allows internal checks and small-scale repairs of the swing reduction gear without removing the housing body from the upper swing structure.

Means for Solving the Problems (1) A. A flange member is provided at the upper bearing locking part on the inner periphery of the housing body so that it can be pulled out toward the top of the housing body, and the outer periphery of the flange member is attached to the inner periphery of the housing body. In addition, the inner periphery of the flange member is configured to be able to be fitted into and removed from the outer periphery of the outer ring of the upper bearing, and (b) the flange member is fixed to the housing body.

(2) A flange member is provided on the upper bearing locking part of the inner periphery of the housing so that it can be pulled out toward the top of the housing body, and the outer periphery of the flange member is attached to the inner periphery of the housing, and the flange member is attached to the inner periphery of the housing. The inner periphery of the pinion shaft is configured such that the inner periphery thereof can be fitted to and removed from the outer periphery of the outer ring of the upper bearing, and (b) a sealing member for the outer periphery of the pinion shaft is fitted onto the upper side of the flange member.

Function (1) A: The flange member provided on the periphery of the housing body is constructed so that it can be pulled out toward the top of the housing body, so when the swing motor, reduction gear mechanism, and ring gear body are sequentially removed from the top,
The flange member can be extracted upwardly.

(b) In the above manner, the flange member can be removed, and the upper and lower bearings, pinion shaft, etc. can be removed by facing upward.

(2) A. The effect of providing a flange member on the upper bearing locking part on the inner periphery of the housing is as described in (1) above.
It is the same as in the case of (a). (b) In order to prevent oil leakage of the lubricating oil for the reduction gear mechanism in the swing reducer, a sealing member is provided on the upper side of the flange member. As a result, an oil bath for the reduction gear mechanism is formed, and since the seal member is located above the swing reduction gear, the seal can be easily replaced.

Embodiments Hereinafter, embodiments of this invention will be described in detail based on the drawings.

(1) FIG. 1 is a sectional view of a swing reduction gear 20 according to claim 1 of this invention. In the figure,
Components using the same components as in the prior art are given the same reference numerals. 21 is a housing body, 22
23 is a locking portion for the lower bearing 15 of the housing body 21; 24 is a pinion shaft; 25 is a flange member;
is a spacer member, and 26 is a bolt.

Next, the configuration of the swing reduction gear 20 according to this invention will be described with reference to FIG. Housing body 21
A flange member 22 is provided at the locking portion for the upper bearing 14 on the inner circumference so that it can be pulled out toward the top of the housing body 21, and the outer circumference A of the flange member 22 is attached to the inner circumference B of the housing body 21, and The inner peripheral part C of the flange member 22 is the upper bearing 1
It is set so that it can be freely fitted and removed from the outer circumference of the outer ring of No. 4. At the same time, the flange member 22 is fixed to the housing body 21 side with bolts 26.

Next, the operation of the swing reduction gear 20 according to this invention will be described. When performing an internal check or small-scale repair of the swing reducer 20 mounted on the upper rotating structure 1 of a hydraulic excavator, first remove the swing motor 6 portion attached to the top as shown in FIG. Then, remove the reduction gear mechanism 13 and ring gear body 12 from the top in order, and then remove the bolts 2.
6, the flange member 22 can be pulled out upward. In this way, as shown in FIG. 3, the flange member 22 can be removed, and the upper and lower bearings 14, 15, pinion shaft 24, etc. can be turned upward (in the direction of arrow H) and removed.

(2) FIG. 4 is a sectional view of the swing reducer 27 according to claim 2 of this invention. Swing reducer 2
7 is different from the swing reducer 20 of claim 1 in that a pinion shaft 2 is provided on the upper side of the flange member 28.
4. A sealing member 29 is fitably provided to the outer circumferential portion. 30 is a stop ring for the seal member 29.

Next, the operation of the swing reduction gear 27 according to this invention will be described. The operation when performing an internal check or small-scale repair of the swing reducer 27 mounted on the upper revolving structure 1 of a hydraulic excavator is the same as that of the swing reducer 20 according to claim 1. In addition, a flange member 28 is provided in order to prevent oil leakage of the lubricating oil for the reduction gear mechanism 13 within the swing reduction gear 27. As a result, an oil bath for the reduction gear mechanism 13 is formed, and since the seal member 29 is located above the swing reduction gear 27, the seal can be easily replaced.

Note that FIG. 5 shows the lower bearing 15 in FIG.
A small seal member 31 is attached in place of the spacer member 25 provided on the lower surface side.

Effects of the invention A grease bath section is provided on the upper side of the lower running body of the hydraulic excavator. Therefore, when performing an internal check or small-scale repair of a conventional swing reducer, it is impossible to pull out the pinion shaft, seal member, etc. inside the swing reducer downwards, so the swing reducer with a swing motor is moved upwards. It was lifted up and removed. This work requires a great deal of effort and time, as it requires loosening and removing the tightening bolts of the swing reducer that are fastened to the upper revolving structure, and also removing all piping connected to the swing reducer with swing motor. Was.

However, in the swing reduction gear according to this invention, a flange member is provided on the inner circumference of the housing body so that it can be pulled out upwardly, and the upper bearing is fitted into the flange member. Thereby,
When performing an internal check or small-scale repair of the swing reducer, remove the swing motor, reduction gear mechanism, ring gear body, and flange member from above in order.
The upper and lower bearings, pinion shaft, etc. can be removed by pointing upwards. Furthermore, by providing the seal member on the upper side of the flange member, an oil bath for the reduction gear mechanism was formed, oil leakage was prevented, and the seal member could be replaced easily.

Therefore, in the swing reducer according to this invention, when performing an internal check or small-scale repair of the swing reducer, the pinion shaft, seal member, etc. can be removed upwardly without removing the housing body from the upper rotating structure. This reduces the labor and time involved in the repair work and improves the maintainability of the swing reducer.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the swing reducer according to claim 1 of this invention, Figs. 2 and 3 are views showing the state in which parts of the swing reducer are removed, and Figs. 4 and 5 are views of the swing reducer according to claim 1. 6 is a side view of a hydraulic excavator, FIG. 7 is a sectional view of a main part showing a swing device, and FIG. 8 is a cross section of a conventional swing reducer. It is a diagram. 1... Upper revolving body, 6... Swing motor, 7, 2
0, 27... Rotating reducer, 8, 24... Pinion shaft, 11, 21... Housing body, 12... Ring gear body, 13... Reduction gear mechanism, 14... Upper bearing, 15... Lower bearing, 18, 29, 31...
Seal member, 22, 28... flange member.

Claims (1)

[Claims for Utility Model Registration] (1) A swing bearing is interposed between the upper rotating body and the lower traveling body, and the upper rotating body can be rotated relative to the lower traveling body by a swinging device, and the swinging device A swing reducer in which upper and lower locking parts are provided on the inner periphery of the housing for a swing reducer, and upper and lower bearings are respectively fitted into the locking parts to support a pinion shaft. A flange member is provided at the locking part for the upper bearing of the housing body so that it can be pulled out toward the top of the housing body, and the outer periphery of the flange member is attached to the periphery of the housing body, and the inner periphery of the flange member is attached to the upper bearing part. A structure of a swing reduction gear, characterized in that the flange member is configured to be able to be fitted into and removed from an outer circumferential portion of an outer ring, and the flange member is fixed to a housing. (2) A swing bearing is interposed between the upper rotating body and the lower traveling body, and the upper rotating body can be rotated relative to the lower traveling body by a rotating device, and the inner periphery of the housing for the swing reducer of the rotating device is In a swing reduction gear in which a pinion shaft is supported by an upper and a lower locking part provided in the housing, and upper and lower bearings are respectively fitted into the locking parts to support a pinion shaft, the locking part for the upper bearing on the periphery of the body of the housing. A flange member is provided so as to be removable toward the top of the housing body, and the outer periphery of the flange member is fitted to the periphery of the housing body, and the inner periphery of the flange member is fitted to the outer periphery of the outer ring of the upper bearing. A structure of a swing speed reducer, characterized in that it is removably set and a sealing member for an outer peripheral portion of a pinion shaft is fitted onto an upper side of the flange member.