JP2000110197A - Greasing structure for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a greasing work to a pinion and a ring gear of a revolving drive part in a working vehicle having the upper slewing body, at a position where one can easily work and he is not required to go through under the upper slewing body, and also facilitate the greasing work by concentrating greasing ports. SOLUTION: A bearing greasing port 36 through which grease is supplied to the bearing 33 of a pinion 32 and a bearing degreasing port 38 through which grease is discharged from the bearing 33 are concentrically arranged in a position of the upper slewing body 6 respectively, where grease can be easily supplied. Further, gear greasing ports 40 communicating with the a housing part 4b of a ring gear 34 to supply grease to the teeth 34a of the gear 34 are provided at the bearing greasing port 36 and the bearing degreasing port 38 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greasing structure for a working vehicle, and more particularly, to a greasing structure for a turning drive unit of a working vehicle having an upper swing body.

[0002]

2. Description of the Related Art A work vehicle having an upper revolving structure, such as a hydraulic shovel or a crane truck, has an upper revolving structure rotatably mounted on a lower traveling structure via a revolving bearing, and drives the upper revolving structure to revolve. And a ring gear with internal teeth meshing with the pinion. When the pinion is driven to rotate by, for example, a hydraulic motor, the upper revolving unit pivots on the lower traveling unit around the center of the ring of the ring gear. It is necessary to periodically supply oil such as grease to the pinion bearings and the meshing tooth surfaces of the pinion and the ring gear in order to prevent malfunctions and wear due to friction.

[0003] Therefore, the pinion bearing portion is always closed with a plug for supplying grease nipples for supplying grease, and for discharging old grease in the bearings when the grease is injected. Outlet is provided. The ring gear housing is provided with a greasing port to which a grease nipple for greasing grease is attached.

[0004]

The conventional greasing structure for a working vehicle as described above has the following problems to be solved. That is, since the pinion and the ring gear for rotating the upper revolving unit are provided at the center of rotation of the upper revolving unit, the greasing work is performed from the side or above the upper revolving unit by the greasing port and the discharge port. In, the equipment, piping and covers housed in the upper revolving body obstruct, and the position of the greasing port and the discharge port becomes farther from the outside of the upper revolving body as the upper revolving body becomes larger,
Difficult to lubricate. Therefore, for lubrication, an opening for greasing work is formed in a portion of the bottom surface of the upper revolving unit close to the center of rotation, and the greasing is performed from below the upper revolving unit through this opening. However, since the greasing operation from below has to go under the upper revolving unit every time the greasing operation is performed, improvement of workability is desired. Further, some vehicles cannot form an opening on the bottom surface of the upper swing body due to its structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is that a greasing operation of a turning drive unit of a working vehicle having an upper turning body can be performed without diving under the upper turning body. An object of the present invention is to provide a greasing structure of a working vehicle that can perform the greasing work more easily and perform greasing work more easily by consolidating greasing ports.

[0006]

According to the present invention, there is provided a greasing structure for a working vehicle which solves the above technical problem, comprising an upper revolving body which is pivotally mounted on a lower traveling body.
In a working vehicle having a pinion and a ring gear for turning the upper revolving unit, a bearing greasing port for supplying oil and fat to a bearing of the pinion and a bearing discharge port for discharging oil and fat from the bearing are each provided in the upper part. A greasing structure for a working vehicle is provided, which is collectively arranged on a revolving structure.

Therefore, the greasing operation can be performed more easily by arranging the bearing greasing port and the bearing discharge port in a place where the greasing work of the upper revolving unit is easily performed by, for example, a communication pipe. it can.

[0008] In a preferred embodiment, a gear greasing port that communicates with the accommodating portion of the ring gear and supplies oil and fat to the tooth surface of the gear is provided alongside the bearing greasing port and the bearing discharge port.

Therefore, it is possible to easily lubricate the tooth surfaces of the ring gear meshing with the pinion, which is the lubrication unit of the same turning drive unit, together with the lubrication of the pinion to the bearing.

In a preferred embodiment, the working vehicle is a hydraulic shovel, and the greasing port and the discharge port are
The hydraulic excavator is arranged at a work machine mounting portion.

[0011] In a hydraulic excavator, which is a typical example of a work vehicle, it is preferable that a greasing port and a discharge port are arranged in a work implement mounting portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a greasing structure for a working vehicle constructed in accordance with the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, a hydraulic shovel generally designated by reference numeral 2 which is a typical example of a work vehicle having an upper revolving structure has a revolving axis line 5 extending vertically on a lower traveling structure 4. The upper revolving body 6 is provided so as to be freely rotatable.

Referring to FIG. 2 together with FIG. 1,
The upper swing body 6 is provided with a swing hydraulic joint 22 and a swing unit 24 including a swing drive pinion at a swing center (swing axis 5). Around the turning center,
A cab 8, an engine 10, a radiator 12, a hydraulic pump 14, a hydraulic oil tank 16, a fuel tank 18, a hydraulic control valve 20, and the like are provided. These devices and devices other than the cab 8 are housed in the upper swing body housing 26. A work implement 28 is also mounted on the upper swing body 6.

Referring to FIGS. 1 to 3 and mainly to FIG. 3, the upper revolving unit 6 is mounted on the lower traveling unit 4 by a revolving bearing 30 so as to be pivotable. Swivel unit 24
Has a hydraulic motor 24a, a planetary gear reducer 24b that reduces the rotational output of the hydraulic motor 24a, and a pinion 32 that outputs a turning drive force via the planetary gear reducer 24b. The rotation unit 24 is provided with an axis 32 of the pinion 32.
It is attached to the revolving frame 6 a of the upper revolving unit 6 with a being vertical. The pinion 32 is a turning unit 24
Are supported by bearings 33. The bearing 33 includes a tapered roller bearing 33a, and a grease inlet hole 33b communicating with the tapered roller bearing 33a and a grease outlet hole 33c for discharging old grease when grease is injected are provided in the rotating unit 2 of the bearing 33.
4 respectively.

An internal gear ring gear 34 meshing with the pinion 32 is formed integrally with the inner race of the swing bearing 30 and is fixedly attached to the lower traveling frame 4a of the lower traveling body 4. The lower traveling unit 4 has a housing 4b for the ring gear 34 formed by the lower traveling unit frame 4a and the upper revolving unit frame 6a. Upper revolving unit frame 6a at a portion adjacent to tooth surface portion 34a of ring gear 34
Is formed with a grease inlet hole 6b.

Referring to FIG. 4 together with FIG. 1 to FIG. 3, the upper revolving unit 6 of the working machine 28 of the hydraulic excavator 2 will be described.
The bearing lubrication port 3
6, the bearing outlet 38 and the gear greasing port 40 are provided collectively. The bearing greasing port 36 is connected to the grease inlet hole 33b of the bearing 33 of the turning unit 24 by the communication pipe 42.
The bearing discharge port 38 is connected to the grease outlet hole 33c of the bearing 33 by a communication pipe 44, and the gear greasing port 40 is connected to the grease inlet hole 6b of the receiving portion 4b of the ring gear 34 by a communication pipe 46.

The bearing greasing port 36 is formed by attaching a grease nipple 43 to a through connection port 27a formed in the mounting frame 27 of the working machine 28. Bearing outlet 38
Is formed by attaching an openable and closable plug 45 to a through connection port 27 b formed in the mounting frame 27. The gear greasing port 40 is formed by attaching a grease nipple 47 to a through connection port 27c formed in the mounting frame 27.

The communication pipe 42 is connected to a grease inlet hole 33b of the bearing 33 of the swivel unit 24 by a pipe joint 42a provided at one end thereof, and to a through connection port 27a of the mounting frame 27 by a pipe joint 42b provided at the other end. Each is connected. The communication pipe 44 is connected to a grease outlet hole 33c of the bearing 33 by a pipe joint 44a provided at one end thereof.
Are connected to the through connection port 27b of the mounting frame 27 by a pipe joint 44b provided at the other end.
The communication pipe 46 is connected to a grease inlet hole 6b of the accommodation portion 4b of the ring gear 34 by a pipe joint 46a provided at one end thereof.
Are connected to the through connection port 27c of the mounting frame 27 by a pipe joint 46b provided at the other end.
The communication pipe 42, the communication pipe 44, and the communication pipe 46 are formed of a known rubber hose for lubrication. As the communication pipe, a steel pipe, a copper pipe, a nylon hose, or the like can be appropriately used.

The operation of the greasing structure of the working vehicle as described above will be described with reference to FIG.

(1) Lubrication work: pinion 3 of turning drive unit
When greasing the second bearing 33, grease is injected from the grease nipple 43 of the bearing greasing port 36 provided in the mounting frame 27 of the working machine 28 using a grease gun. At this time, the plug 45 adjacent to the grease nipple 43 is removed, and the bearing outlet 38 is left open. The grease injected from the bearing greasing port 36 flows through the communication pipe 42 to the tapered roller bearing 33 a of the bearing 33. At this time, old grease in the bearing 33 is discharged from the bearing discharge port 38 opened through the communication pipe 44. When the old grease is discharged, the plug 45 is attached and the bearing discharge port 38 is closed. When greasing the tooth surface portion 34a of the ring gear 34, the grease nipple 47 of the gear greasing port 40 provided on the mounting frame 27 is used to regulate the grease nipple 47 to the accommodating portion 4b of the ring gear 34 through the communication pipe 46 using a grease gun. (For example, by the number of times the grease pump is operated).

(2) Therefore, the greasing operation of the turning drive unit is performed by a shaft which is connected to the bearing 33 and the receiving portion 4b of the ring gear 34 by the communicating pipes 42, 44 and 46, and is arranged at a place where the greasing operation is easy. Since it can be performed from the grease supply port 36, the bearing discharge port 38, and the gear grease port 40, it is not necessary to dive under the upper revolving unit 6, and since the greasing portion is concentrated, the greasing work is easy. It is. Further, since the greasing work is facilitated, forgetting to greasing is prevented, and the greasing is appropriately performed. Therefore, trouble of the turning drive unit can be prevented, and the reliability of the vehicle can be improved.

(3) When the working vehicle is a hydraulic excavator, as shown in FIG.
8 and the gear greasing port 40 are provided in, for example, the work implement mounting portion 27 of the upper swing body 6, the upper swing can be performed without removing the cover or the like of the upper swing body 6 and without diving under the upper swing body 6. The greasing operation can be easily performed from outside the body 6.

[0024]

According to the working vehicle greasing structure constructed in accordance with the present invention, the greasing work of the turning drive unit of the working vehicle having the upper turning body can be performed without diving under the upper turning body. A greasing structure of a working vehicle is provided, which can be performed in a good location and the greasing port is integrated to facilitate greasing work.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hydraulic excavator having a greasing structure for a work vehicle, which is configured according to the present invention.

FIG. 2 is an explanatory view showing the upper revolving structure of the hydraulic shovel shown in FIG. 1 from above, showing a greasing structure according to the present invention and an arrangement of devices provided on the upper revolving structure.

FIG. 3 is a sectional view of FIG. 2 as viewed in the direction of arrows AA.

FIG. 4 is a sectional view of FIG. 3 as viewed in the direction of arrows BB.

[Explanation of symbols]

 2: Hydraulic excavator (working vehicle) 4: Lower traveling body 4b: Ring gear housing part 6: Upper revolving body 27: Mounting frame (Working machine mounting part) 28: Working machine 32: Pinion 33: Bearing 34: Ring gear 34a : Tooth surface portion 36: Bearing greasing port 38: Bearing discharge port 40: Gear greasing port 42: Communication pipe 44: Communication pipe 46: Communication pipe

Claims (3)

[Claims] 1. A work vehicle having an upper revolving body rotatably mounted on a lower traveling body and having a pinion and a ring gear for revolvingly driving the upper revolving body, supplying oil and fat to bearings of the pinion. And a bearing discharge port for discharging oil and fat from the bearings are collectively disposed on the upper swing body. 2. The work according to claim 1, wherein a gear greasing port that communicates with a housing portion of the ring gear and supplies oil to a tooth surface of the gear is provided along with the bearing greasing port and the bearing discharge port. Lubrication structure for vehicles. 3. The greasing structure of a work vehicle according to claim 1, wherein the work vehicle is a hydraulic shovel, and the greasing port and the discharge port are arranged in a work machine mounting portion of the hydraulic shovel. .