JP2002188178A - Grease supply device for hydraulic back hoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store a grease supply device in a compact manner in a building of an upper revolving superstructure and facilitate the grease supply work and the work for replacing a grease storage can. SOLUTION: In this grease supply device consisting of a grease supply source unit 20 and a hose reel 21, the hose reel 21 is arranged at a position close to a side part opening and closing cover 11 and the grease supply source unit 20 is arranged on its innermost side and at a lower part position of an upper part opening and closing cover 14 in a grease supply device storage part 10. Moreover, a clamp part 44 clamping a grease gun 42 is mounted on a frame 1a at a position in front of the hose reel 21, a rising wall 45 is provided at a position adjacent to the hose reel 21, and a switch 46 of a pump 26 is fixed to the rising wall 45. The grease storage can 22 of the grease supply source unit 20 is provided on a pedestal plate 28 loosened from the frame 1a, and a pump unit 23 is in close proximity to the upper part opening and closing cover 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication device for supplying grease for lubrication to a predetermined sliding portion of a front working machine of a hydraulic shovel or the like.

[0002]

2. Description of the Related Art A hydraulic excavator generally has a configuration shown in FIG. In the drawing, reference numeral 100 denotes a crawler traveling lower traveling body, and an upper revolving body 102 is installed on the lower traveling body 100 via a revolving device 101 so as to be capable of turning. The upper swing body 102 is provided with a front work machine 103 including a boom, an arm, and a bucket (or another front attachment), and a cab 104 on which an operator operating the front work machine 103 and the like is mounted. I have. Also, the upper revolving superstructure 10
2 is provided with a building 105 on the rear side.
Various machines, devices, and the like are installed in 05. Further, a counterweight 106 is mounted at the rearmost position of the upper swing body 102.

Here, in the hydraulic excavator shown in FIG.
The rear surface of the counterweight 106 of the upper revolving unit 102 projects rearward from the lower traveling unit 100, and the turning radius of the upper revolving unit 102 is larger than the width of the lower traveling unit 100. However, in recent years,
As shown in FIG. 8, a hydraulic excavator called a so-called small back swing machine in which the upper swing body 202 is always located within the vehicle width of the lower traveling body 200 regardless of the swing position thereof has been put to practical use. . Compared with the standard type hydraulic excavator shown in FIG. 7, the rear small turning machine of this type has a smaller dimension on the rear side than the turning center C of the upper turning body 202, so that the building 205 It is narrower by the minute. However, since the machines and devices installed in the building 205 are not different from the standard type excavators, the machines and devices installed in the building 205 in the small backward turning type excavator Special consideration is required for the arrangement of the components and the like, and they must be housed in a compact manner so as to minimize dead space.

[0004] In a general small backward turning machine, the building 2
In the specific internal configuration of 05, the front position of the counterweight 206 is an engine room 205a in which an engine and a hydraulic pump, a heat exchanger such as a radiator and an oil cooler, and a battery are mounted. Also,
A hydraulic oil tank 207 and a fuel tank 208 are installed at a position in front of the engine room 205a on the opposite side of the installation portion of the cab 204, and a control valve is installed in front of the installation portion of the fuel tank 208. It is a valve chamber 205b. An air cleaner installation section 2 is provided between the engine room 205a and the cab 204.
05c. In the standard type hydraulic excavator shown in FIG. 7, there is a certain margin in the arrangement space of the above-described machines, devices, tanks, and the like, and a utility space for installing tools and the like is also secured. However, the hydraulic excavator of the small rearward turning type is arranged so that dead space is not generated as much as possible in the arrangement space of each machine, equipment, tank, etc. However, the utility space is still large enough. Cannot be provided.

[0005]

By the way, the front working machine of a hydraulic shovel comprises a boom, an arm and a bucket, which are connected to each other by connecting pins so as to be pivotable, and each of which is driven by a hydraulic cylinder. Therefore, the mounting portion of the hydraulic cylinder must also be pivotable by the pin. As described above, the sliding surface including the pivotal portion needs to be smoothly slid by the lubricant. Grease is usually used as the lubricant, but grease must be supplied at an appropriate timing since the grease is always consumed during sliding. The work of supplying grease to each sliding part is called a greasing work. If this greasing work is neglected, the smoothness of operation of the front working machine or the like will be impaired. Abrasion progresses or seizure occurs in each part. Therefore, the greasing operation is extremely important, and it is very important to be able to easily perform the greasing operation.

[0006] As a greasing device, there is a handy type,
An installation type is conventionally used. The hand-operated greasing device has a small and compact configuration because the greasing operator holds it by hand and carries it to a site where greasing is required. Therefore, even if it is a small back swing machine, it is not so difficult to secure a space for installing a hand-held greasing device. However, this handy type greasing device has a drawback in that the amount of stored grease is small, and it is difficult to apply a high pressure during greasing, so that its use range is limited.

In an installation type greasing device, a grease supply driving means for feeding grease under pressure is detachably mounted on a grease storage can, usually called a pail can, and these constitute a grease greasing source unit. Is done. Further, a flexible hose is connected to the grease supply driving means, and a grease gun is attached to a tip of the flexible hose. Here, in order to reduce the frequency of grease replenishment as much as possible, it is necessary to increase the volume of the grease storage can as much as possible, so that the greasing source unit is installed at a predetermined position on the upper rotating body. In addition, since the flexible hose must be routed from the greasing source unit to a position where greasing is required, the flexible hose becomes considerably long. For this purpose, the flexible hose is wound around a hose reel so that a grease gun provided at the tip of the flexible hose can be pulled out to a place where lubrication is required at the time of lubrication.

As described above, the configuration of the stationary greasing apparatus including the greasing source unit and the hose reel is considerably large. For this reason, especially like a small tail turning machine,
When the building is made smaller, it becomes difficult to secure an installation space for the greasing device. The present invention has been made in view of the above points, and the purpose thereof is to:
An object of the present invention is to make it possible to compactly store a greasing device in a building of an upper rotating body, and to facilitate a greasing operation and a grease storage can replacement operation.

[0009]

In order to achieve the above-mentioned object, according to the present invention, in a building, a greasing device accommodating portion provided with a side opening / closing cover on a side surface at a rear portion of a cab is formed. A hose reel around which a flexible hose is wound is disposed on the front side of the side opening / closing cover in the greasing device housing, and a greasing source unit is disposed on the back side. And an upper opening / closing cover that can be opened / closed at the upper portion of the housing.

[0010] Here, the greasing device housing section in which the greasing device is mounted is located at the rear portion of the cab. Even in the small backward turning hydraulic excavator shown in FIG. 8, there is some space between the cab and the air cleaner installation portion. Here, the rear side of the air cleaner installation portion is an engine room, and the engine room extends over substantially the entire length in the width direction of the upper swing body. The air cleaner is relatively long, and a space can be secured between the cab and the air cleaner installation part.However, this space is long in the width direction of the upper revolving unit, and the space in the front-rear direction is fairly narrow. Become. As described above, the grease supply device includes a grease storage can and a grease supply drive unit, and a grease supply unit is configured. The flexible hose is wound around a hose reel. Therefore, although it is necessary to arrange the hose reel as close as possible to the greasing source unit,
Their relative positional relationship is arbitrary. That is, the greasing source unit and the hose reel may be arranged vertically or horizontally.

A flexible hose must be drawn from the hose reel. When the grease is consumed, the grease storage can needs to be replaced or replenished.
The most reasonable way to pull out the flexible hose from the hose reel is to pull it out toward the side of the building, and it is also desirable from the viewpoint of operability. On the other hand, since the grease supply driving means is mounted on the upper part of the grease storage can, it is more convenient to lift the grease supply drive means and the grease storage can upward when replacing the grease storage can. From the above, the greasing device housing section in the building is provided with two openable and closable parts, and one of the openable and closable parts is a side openable cover, and a hose is provided at a position close to the side openable cover. Install the reel. Further, a greasing source unit is arranged at a position behind the hose reel. For this reason, even if the side opening / closing cover is opened, the hose reel becomes an obstacle, and the greasing source unit cannot be taken out from the side opening / closing cover. Therefore, by providing an upper opening / closing cover above the disposition position of the greasing source unit, operations such as replacement of the grease storage can can be performed smoothly. The greasing device storage section is long in the width direction in the upper revolving structure, and can secure only a space with a small space in the front-rear direction. it can.

When the height of a building is compared with the height of a greasing device, in particular, the height of a greasing source unit, the height of the building is generally higher. In this case, a pedestal is provided on the frame of the upper rotating body, a greasing source unit is installed on the pedestal, and the upper portion of the grease supply driving means is arranged at a position close to the upper opening / closing cover. Therefore, there is a space between the lower part of the pedestal and the frame, but this space is a space for installing parts, for example, a pipe for connecting a pilot valve connected to an operation lever provided in the cab and a control valve. A shockless valve provided in the middle can be arranged. Of the upper covers that make up the building, the upper position of the hose reel arrangement part is a fixed cover, and the upper openable cover is detachably fixed to this fixed cover with bolts, or the upper openable cover is hinged to the fixed cover. It may be configured to be connected. In short, the upper opening / closing cover is always fixedly held, and it is sufficient that the upper opening / closing cover can be opened as easily as possible when replacing the grease storage can. As an overall configuration of the hydraulic excavator, it is extremely advantageous if the upper revolving structure is applied to a small rearward turning type having a turning radius within the vehicle width of the lower traveling unit, but it is not necessarily limited to this type. Instead, it is also applied to a standard type excavator.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, a greasing device mounted on a small rear turning type hydraulic shovel will be described. However, the greasing device of the present invention can be applied to a so-called standard type hydraulic shovel and the like.

FIG. 7 shows an overall configuration of the small rear swing machine. FIG. 1 is a plan view of a portion corresponding to the position indicated by S in FIG. 7 of the small rear swing type excavator. . In the figure, reference numeral 1 denotes an upper revolving structure. A cab 2 is disposed at a position in front of the upper revolving structure 1. A mounting bracket 3 of a front working machine is provided adjacent to the cab 2. I have. A building 4 is provided at these rear positions, and a counterweight is attached at the rearmost position, although not shown in the figure.

The rear side of the building 4 has an engine room 5
And between the cab 2 and the engine room 5
A relatively small space is formed, and an air cleaner 6 for purifying air supplied to the engine is installed in this space. The air cleaner 6 is located on the side close to the engine room 5, and a predetermined gap is formed between the air cleaner 6 and the rear wall of the cab 2. This gap is an elongated space from the side of the building 4 to the turning wheel 7, and this space is
Becomes The greasing device storage unit 10 is a substantially closed space covered by a side cover and an upper cover that constitute the building 4.

The side cover at this position is a side opening / closing cover 11 which can be opened / closed, and can be opened, for example, in the direction of the arrow in FIG. Of the upper covers, 12 and 13 are fixed covers, and an upper opening / closing cover 14 is provided between the fixed covers 12 and 13. Here, the fixed covers 12 and 13 cannot be fixed and opened by welding or the like, but are usually screwed to appropriately provided column members or beam members. The upper opening / closing cover 14 is also fixed by screwing. However, the fixed cover 12,
13 is not intended to open,
This is different from the upper opening / closing cover 14 which is opened and closed when the grease storage can 22 described later is replaced.

FIGS. 2 to 5 show the internal structure of the greasing device housing section 10. FIG. As shown in FIG. 2, the greasing device includes a greasing source unit 20 and a hose reel 21. The lower part of the greasing source unit 20 is a grease storage can 22 also called a pail can. On the upper part of the grease storage can 22, a pump unit 23 constituting grease supply driving means is detachably installed. The pump unit 23 includes a cover 24 that covers the grease storage can 22,
A suction pipe 25 projecting upward from the cover portion 24;
And a pump 26 (electric pump or hydraulic pump) connected to the tip of the suction pipe 25. And the grease storage can 2 of the pump unit 23
The connection to the grease reservoir 2 is performed by fastening a plurality of thumb screws 27 provided on the side of the cover 24 to the upper edge of the grease storage can 22.

The grease storage can 22 is installed on a pedestal plate 28 provided on the frame 1a of the upper swing body 1. The grease storage can 22 is mounted on the pedestal plate 28 so that the grease storage can 22 does not move unintentionally when installed. A regulating plate 29 for fixed positioning is provided upright. Also, the greasing device storage unit 1
A support member 31 is attached to the column member 30 provided at 0 so as to face upward, while a connection plate 32 formed in a substantially L shape is attached to the cover portion 24 constituting the pump unit 26. A positioning guide member 33 is provided at an upper position of the support member 31, and the connecting plate 32 of the cover 24 is inserted into the positioning guide member 33. Thereby, the greasing source unit 20
Is installed at a predetermined position, the grease storage can 22 is regulated by the regulating plate 29, and the connecting plate 32 is engaged with the positioning guide member 33, so that even if the vehicle vibrates, the vehicle is misaligned. Will not be held. In addition, by lifting the entire greasing source unit 20 upward, the greasing source unit 20 can be separated from the regulating plate 29 and the positioning guide member 33.

The pump 26 constituting the pump unit 23
Is connected to one end of a connection pipe 34. The hose reel 21 has a rotating shaft 35, a hose winding drum 36 is fitted to the rotating shaft 35, and flanges 37 are attached to the left and right sides of the hose winding drum 36. Both ends of the rotating shaft 35 are rotatably supported by brackets 38 erected on the frame 1a.
The other end of the connection pipe 34 is connected to one bracket 38.
Is connected to a swivel joint 39 provided at the mounting portion of the rotating shaft 35 at

The hose winding drum 36 has a flexible hose 4
The winding start end of the flexible hose 40 around the hose winding drum 36 is in communication with the inside of the rotating shaft 35 and the connection pipe 34 via the swivel joint 39. The flexible hose 40 is pulled out from the hose winding drum 36 and is led out from a drawer 41 attached to the tip of the bracket 38, and a grease gun 42 is attached to the tip. Further, the flexible hose 40 is provided with a stopper 43 for regulating a winding end portion of the hose wound on the hose winding drum 36. The flexible hose 40 is not moved until the stopper comes into contact with the drawer 41. It is wound on the hose winding drum 36.

Here, as shown in FIG. 3 and FIG. 4, the hose reel 21 is disposed in the greasing device accommodating section 10 at a position close to the side opening / closing cover 11. The unit 20 is located on the back side of the unit 20 at a position below the upper opening / closing cover 14. A clamp portion 44 for clamping and holding the grease gun 42 is mounted on the frame 1 a at a position on the near side of the hose reel 21, and the standing wall 4 is located at a position adjacent to the hose reel 21.
The switch 46 of the pump 26 is fixed to the upright wall 45.

Further, as is apparent from FIG. 4, the pedestal plate 28 is in a state of being suspended from the frame 1a, and a device such as a shockless valve 47 is installed in the lower space. Here, the shockless valve 4
Reference numeral 7 is provided in a pipe between a pilot valve mounted on an operating means such as an operating lever provided in the cab 2 and a control valve for controlling the operation of the hydraulic actuator, and facilitates the operation of these hydraulic actuators. It is for exhibiting the function for. Further, in FIG. 2, reference numeral 48 denotes a handle provided at the upper end of the pump 26.

FIGS. 4 and 5 show the air cleaner 6 in phantom lines. As is apparent from these drawings, a part of the air cleaner 6 includes the upper region of the hose reel 21, and the rear end of the air cleaner 6 extends to a position short of the disposition position of the greasing source unit 20. As a result, the disposition position of the air cleaner 6 partially overlaps the greasing device accommodating portion 10, but the air cleaner reaches the upper position of the greasing source unit 20 in the greasing device accommodating portion 10. 6 does not enter.

The present embodiment is configured as described above. In supplying grease to each sliding portion constituting the front working machine, the side opening / closing cover 11 is first opened. Since the clamp portion 44 to which the grease gun 42 attached to the distal end of the flexible hose 40 is clamped is located on the front side of the hose reel 21 in the frame 1a, the operator can easily take out the grease gun 42. be able to. Then, the grease gun 42 is pulled out by pulling out the flexible hose 40 from the hose reel 21.
Can be connected to the point to be greased. Here, the flexible hose 40 has a length that allows the grease gun 42 to reach the greasing point farthest from the hose reel 21 so that all greasing points can be smoothly lubricated. Become. The pump 26 for pumping grease is connected to the switch 4.
6, the operation of starting and stopping the pump 26 can be easily performed. The grease gun 42 is provided with an opening / closing means for an ejection port, and by operating this, actual greasing work is controlled. When the greasing operation is completed, the flexible hose 40 is wound around the hose reel 21 so that the long flexible hose 40 can be stored compactly.

As described above, since the greasing operation from the extraction of the flexible hose 40 to the storage thereof can be performed by the operator from the ground, the operation can be performed smoothly and safely. When the greasing work is completed, the grease gun 42
Is clamped by the clamp portion 44, and then the side opening / closing cover 11 is closed.

When greasing is performed repeatedly, the grease storage can 2
The grease in 2 is consumed. Therefore, when the grease storage can 22 is empty, the grease storage can 22 must be replaced or grease must be supplied. In this operation, first, the upper opening / closing cover 14 is opened. Here, since the upper opening / closing cover 14 is screwed to the fixed cover 12, it is necessary to remove this screw. Therefore, like the upper opening / closing cover 50 shown in FIG.
If the locking tool 52 is provided on the other side, the troublesome work of attaching and detaching screws is not required.

When the upper opening / closing cover 14 is opened, a greasing source unit 20 is installed at a lower position, and a handle 48 is provided above the pump 26 at the uppermost position of the greasing source unit 20. Therefore, by grasping the handle 48 by hand and pulling it up, the greasing source unit 20
Can be taken out of the whole. Here, in the greasing source unit 20, the grease storage can 22 is located in the regulating plate 29, and the connecting plate 32 is
The grease supply unit 20 is held in such a manner that it does not shift out of place, but there is no particular restriction on the upper part. There is no. A connection pipe 34 is connected between the greasing source unit 20 and the hose reel 21. The connection pipe 34 is formed of a flexible hose or the like, and has a sufficient extra length. By having it, the greasing source unit 20 can be taken out from the greasing device housing section 10 upward while the connection pipe 34 remains connected to the pump 26.

In addition, the greasing source unit 20 is not installed directly on the frame 1a, but on the frame 1a.
Since the pedestal plate 28 is provided on the pedestal plate 28 and the height of the pedestal plate 28 is adjusted, the handle 48 provided at the upper end of the greasing source unit 20 is attached to the upper opening / closing cover 14. It can be arranged in a close position. Therefore, the operation of the operator grasping the handle 48 and pulling it up can be performed extremely easily. Also, the upper opening / closing cover 14
The fixed covers 12, 13 are located before and after
An operator can lift the greasing source unit 20 so as to straddle the opened portion by removing the upper opening / closing cover 14. Then, the base plate 28 is lifted from the frame 1a, and the shockless valve 4
Since it is used as a space for installing devices and components such as 7, the space in the greasing device accommodating section 10 is utilized very effectively. Therefore, even if the building 4 is miniaturized in order to configure as a small backward turning type hydraulic excavator,
Various machines and devices can be rationally arranged, and space efficiency becomes extremely high.

As described above, after the greasing source unit 20 is taken out to the upper part of the building 4, the thumb screw 27 is removed, and
The pump unit 23 and the grease storage can 22 are separated. Then, the pump unit 23 is replaced with a new grease storage can 22. When the replacement work is completed, the handle 48 is gripped, and the greasing source unit 20 equipped with the new grease storage can 22 is mounted again at a predetermined position. That is, the grease storage can 22 is arranged inside the regulating plate 29 erected on the base plate 28, and the connecting plate 32 connected to the cover 24 of the pump unit 23 is inserted into the positioning guide member 33. Thus, the greasing source unit 20 is installed at a predetermined position while controlling its direction, and is fixed in a substantially stable state.

[0030]

Since the present invention is constructed as described above, the greasing device can be compactly stored in the upper revolving structure building, and the greasing operation and the replacement operation of the grease storage can are facilitated. Has the effect of

[Brief description of the drawings]

FIG. 1 is a plan view of a portion corresponding to a position indicated by S in FIG. 7 of a hydraulic excavator in which a greasing device according to an embodiment of the present invention is installed.

FIG. 2 is an exploded perspective view of the greasing device showing one embodiment of the present invention.

FIG. 3 is a plan view of the greasing device installed in the greasing device storage unit.

FIG. 4 is a right side view of FIG.

FIG. 5 is a front view of FIG. 3;

FIG. 6 is a perspective view showing a modification of the upper opening / closing cover.

FIG. 7 is a front view of a standard type hydraulic excavator.

FIG. 8 is an external perspective view of a small rear turning type hydraulic shovel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper revolving body 1a Frame 2 Cab 4 Building 10 Greasing device storage part 11 Side opening / closing cover 12,13 Fixed cover 14,50 Upper opening / closing cover 20 Greasing source unit 21 Hose reel 22 Grease storage can 23 Pump unit 24 Cover part 26 pump 28 pedestal plate 34 connection pipe 35 rotating shaft 36 hose winding drum 40 flexible hose 42 grease gun 47 shockless valve 51 hinge 52 locking tool

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Nozomu Tanaka 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. (72) Koji Koideishi 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Inside the Tsuchiura Plant, Ltd. (72) Inventor Ryuji Tanaka 1374-5, Arakawaoki Hongo, Ami-cho, Inashiki-gun, Ibaraki Prefecture (72) Inventor Kayo Takahashi 3-130-1 Kariyacho, Ushiku-shi, Ibaraki F-term (Reference)

Claims (6)

[Claims] 1. A front work machine, a cab, and a building are mounted on an upper revolving structure rotatably mounted on a lower traveling structure, and work such as excavation of earth and sand is performed by the front work machine. A grease storage can, mounted on a hydraulic excavator, and a grease supply can for supplying grease to sliding parts of the front working machine, and a grease supply driving unit detachably mounted on an upper part of the grease storage can and for feeding grease under pressure. A grease supply hose including a grease supply unit including a grease supply drive unit having one end connected to a grease supply drive unit of the grease supply unit, and a grease gun provided at the other end. And a hose reel around which is wound a greasing device housing part provided with a side opening / closing cover on a side surface at a rear portion of the cab in the building; In the storage part, a hose reel around which the flexible hose is wound is disposed on the front side of the side opening / closing cover, and the greasing source unit is disposed on the back side, and a disposing part of the greasing source unit is provided. An oil supply device for a hydraulic shovel, characterized in that an upper opening / closing cover that can be opened / closed is provided on an upper portion of the glove. 2. A frame is provided on the frame of the upper rotating body, and the greasing source unit is installed on the frame.
The upper portion of the grease supply driving means is arranged at a position close to the upper opening / closing cover, and a space between a lower portion of the pedestal and the frame is used as a component installation space. Item 3. A greasing device for a hydraulic shovel according to Item 1. 3. A pilot valve connected to an operation lever provided in the cab, wherein the component installation space includes:
The oil supply device for a hydraulic shovel according to claim 2, wherein a shockless valve is provided in a pipe connecting the control valve for controlling the operation of the hydraulic actuator. 4. A fixed cover is formed at an upper position of the arrangement portion of the hose reel in the upper cover, and the upper opening / closing cover is detachably fixed to the fixed cover with bolts. The oil supply device for a hydraulic shovel according to claim 1. 5. The fixing device according to claim 1, wherein an upper position of the hose reel arrangement portion of the upper cover is a fixed cover, and the upper opening / closing cover is connected to the fixed cover by a hinge. A lubrication device for the hydraulic excavator according to the above. 6. The lubrication device for a hydraulic shovel according to claim 1, wherein a rear turning radius of the upper turning body is equal to or less than a vehicle width of the lower traveling body.