JP2724863B2 - Grease supply device for construction machinery - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a grease supply device suitable for supplying grease to a plurality of lubricated parts having different oil supply system path lengths in construction machines and the like.

[Prior Art] Next, a grease supply device in a conventional hydraulic excavator working machine shown in FIGS. 4 and 5 will be described.

A boom 2 which is raised and lowered by boom cylinders 3A and 3B is attached to a front portion of the shovel body 1 by pins.
An arm 4 that swings up and down by an arm cylinder 5 is connected to a tip end of the boom 2 by a pin. The rods of the boom cylinders 3A and 3B and the boom 2 are connected to each other via bearings 6A and 6B, which are connection swinging parts. The bottom part of the arm cylinder 5 and the boom 2 are connected to each other via a bearing part 7 which is a connecting swing part, and the rod of the arm cylinder 5 and the base end of the arm 4 are a bearing part 8 which is a connecting swing part. Are connected to each other.

One end of oil supply pipes 9 and 10 is connected to bearings 6A and 6B, one end of oil supply pipes 11 and 12 is connected to bearing 7, and one end of oil supply pipes 13 and 14 is connected to bearing 8. Are linked. Refueling pipes 9, 10, 11, 12, 13, 14 are fixed to boom 2 by supports 15, 16, and refueling ports 17, 18, 19, 20, 21, 22 are provided at other ends. Is provided.

The above-mentioned lubrication to the bearings located at the high places is performed from the lubrication ports provided at one place to improve workability.

[Problems to be Solved by the Invention] However, when there are many bearing parts, a long oil supply pipe is required for each of them, and many oil supply ports are provided. Therefore, the number of parts increases, and
The present invention is intended to eliminate such difficulties, and the purpose of the present invention is to uniformly lubricate a plurality of lubricated parts having different lubrication system path lengths from one lubrication port. It is an object of the present invention to provide a grease supply device that can be used.

[Means for Solving the Problems] In order to achieve the above object, a grease supply device for a construction machine or the like according to the present invention provides a lubricating pipe having a plurality of lubricated portions having different lubricating system path lengths each having a throttle. And an arbitrary number of pipe joints, and are connected to one oil supply port so that the line resistance and the throttle resistance in the oil supply passage for each lubricated portion are substantially equal to each other.

[Operation] If grease is injected from one oil supply port, grease is almost uniformly supplied to each lubricated portion.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 4 and 5 in these figures.
The components denoted by the same reference numerals as those in the drawings represent the same components.

The other end of the first oil supply pipe 24 having one end connected to one oil supply port (for example, a grease nipple) 23 is connected to a first joint member 25 fixed on the boom 2 and one end of a second oil supply pipe 26. It is connected to. Refueling port 23 of first refueling pipe 24
The side portion is fixed to a support member 28 fixed on the boom 2. The other end of the second oil supply pipe 26 is connected to a second joint member 27 fixed on the boom 2 and the third oil supply pipe
It is connected to one end of 29. The other end of the third oil supply pipe 29 is connected to one bearing 8. The other end of the fourth oil supply pipe 30 having one end connected to the second joint member 27 is connected to the other bearing portion 8. The other end of each of the fifth oil supply pipe 31 and the sixth oil supply pipe 32 having one ends connected to the first joint member 25 is a bearing 6A, respectively.
6B, the other ends of the seventh oil supply pipe 33 and the eighth oil supply pipe 34 each having one end connected to the first joint member 25, respectively. 2nd oil supply pipe 26, 3rd oil supply pipe
29, fourth oil supply pipe 30, fifth oil supply pipe 31, sixth oil supply pipe 32, seventh
In the middle of the oil supply pipe 33 and the eighth oil supply pipe 34, the first throttle
35, second aperture 36, third aperture 37, fourth aperture 38, fifth aperture 3
9, a sixth stop 40 and a seventh stop 41 are provided.

The configuration is such that the pipeline resistance (varies the inner diameter of the pipeline) and the throttle resistance in the lubrication system from the filler port 23 to each of the bearings 6A, 6B, 7, 7, 8, 8 are almost the same. Have been. That is, the first oil supply pipe 24, the second oil supply pipe 26, the first throttle 35, the second throttle 36, the line resistance and the throttle resistance of the system of the third oil supply pipe 29, the first oil supply pipe 24, the second oil supply pipe. 26, the first throttle 35, the fourth oil pipe 30, the pipe resistance and throttle resistance of the system of the third throttle 37, the first oil pipe 24, the seventh throttle 41, the eighth oil pipe 34.
Line resistance and throttle resistance of the system, the first oil supply pipe 24, the fifth
Line resistance and throttle resistance of the system of the throttle 39 and the sixth oil supply pipe 32, line resistance and throttle resistance of the system of the first oil supply pipe 24, the sixth throttle 40, and the seventh oil supply pipe 33, the first oil supply pipe 24, 4th aperture 38,
The fifth oil supply pipe 31 is configured so that the line resistance and the throttle resistance of the system line are substantially the same.

In this way, it is possible to prevent the excessive grease from flowing out from the bearing portion having a short pipe line, and to cause poor lubrication to the bearing portion having a long pipe line, and it is possible to provide substantially uniform lubrication from one location of the oil supply port 23 to each bearing portion. Can be supplied with grease.

[Effects of the Invention] According to the present invention described above, it is possible to greatly reduce the number of lubrication ports without requiring complicated pipes, and to smoothly lubricate each lubricated portion, Work becomes easier.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention.
FIG. 2 is a system diagram of a grease supply device, FIG. 2 is a side view of a hydraulic shovel, FIG. 3 is a plan view of FIG. 2, FIG. 4 is a side view of a hydraulic shovel having a conventional grease supply device, FIG. 5
The figure is a plan view of FIG. 1 ... excavator body, 2 ... boom, 3A, 3B ... boom cylinder, 4 ... arm, 5 ... arm cylinder, 6A,
6B Bearing part, 7 Bearing part, 8 Bearing part, 23 Oil supply port, 24 First oil supply pipe, 25 First joint member, 26
2nd oil supply pipe, 27 ... 2nd joint member, 28 ... support member, 29
... Third lubrication pipe, 30 ... Fourth lubrication pipe, 31 ... Fifth lubrication pipe, 32 ... Sixth lubrication pipe, 33 ... Seventh lubrication pipe, 34 ... eighth
Refueling pipe, 35 ... first throttle, 36 ... second throttle, 37 ... third
Aperture, 38 ... 4th aperture, 39 ... 5th aperture, 40 ... 6th aperture, 41 ... 7th aperture

Claims (1)

(57) [Claims] A plurality of lubricated parts having different lubricating path lengths are connected to one lubricating port via a lubricating pipe line provided with a throttle and an arbitrary number of pipe joints, and a lubricating system for each lubricated part is connected. A grease supply device for a construction machine or the like, wherein a pipeline resistance and a throttle resistance in a road are configured to be substantially equal to each other.