JP3448503B2 - Mounting structure of boom hoisting cylinder for construction equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder for improving the workability of a cylinder for raising and lowering a boom of an aerial work vehicle, which is a construction machine, when repairing or replacing the cylinder. The present invention relates to a mounting structure of a boom hoist cylinder of a construction machine that allows a mounting pin to be inserted and removed. 2. Description of the Related Art The construction of a conventional aerial work vehicle will be described with reference to FIG. 2. The aerial work vehicle is provided at an end of a telescopic boom on an upper swivel 2 mounted on a traveling device. It has a working device (front attachment) such as a gondola,
An engine 9 and an emergency generator (not shown) are mounted on one side of the upper surface of the upper swivel 2, and a fuel tank 10 and a hydraulic oil tank 11 are mounted on the other side.
And various control operation devices (not shown) are mounted. [0003] A pair of boom mounting frames 7 are mounted at intervals between the mounted engine or emergency generator and the fuel tank and hydraulic oil tank. Further, between the boom mounting frames 7, 7, a pair of boom raising and lowering hydraulic cylinder mounting frames 13, 13 is mounted at a distance, and a boom raising and lowering hydraulic cylinder mounting block 12 is mounted on the upper swivel 2 by bolts 15. Mounted on top. A base end of the hydraulic cylinder 5 for boom raising and lowering mounted on the boom mounting hydraulic cylinder mounting frame 13 is connected to a bracket 6 of the telescopic boom 4 mounted on the boom mounting frame 7. The telescopic boom 4 can be raised and lowered by expansion and contraction of the hydraulic cylinder 4 for raising and lowering the boom.
Various types of work are performed at high altitudes by workers on work floors. [0005] On the upper swivel of such an aerial work vehicle,
To install a new telescopic boom, first use the upper swivel 2
The boom mounting hydraulic cylinder mounting frames 13, 13, which are previously set up on the boom lifting hydraulic cylinder mounting block 12 at intervals on the ground between the boom mounting frames 7, 7 mounted at intervals. The hydraulic cylinder 5 for raising and lowering the boom and the mounting block 12 assembled in this manner are suspended by a crane, installed on the upper swivel 2, and mounted with mounting bolts 15. Thereafter, the telescopic boom 4 is hung by a crane and mounted on the boom mounting frame 7, the bracket 6 of the telescopic boom 4 is connected to the hydraulic cylinder 5 for raising and lowering the boom, and finally, the boom mounting frames 7, 7 are connected. Attach it to the upper swivel 2 at an interval.
An emergency power generator (not shown) is installed, and the fuel tank 10, the hydraulic oil tank 11, various control operation devices (not shown), and the like are placed on the other side. The various control operation devices, the fuel tank 10, the hydraulic oil tank 11, the engine 9
And emergency generators are covered with building covers for protection and aesthetics. Here, the hydraulic cylinder 5 for raising and lowering the boom is connected to the hydraulic cylinder mounting block 12 for raising and lowering the boom.
When mounting without using the boom mounting frame 7, a pair of hydraulic cylinder mounting frames 13, 13 for raising and lowering the boom are directly mounted on the upper revolving base 2 by welding, and a crane is mounted between the mounting frames 13, 13. When the hydraulic cylinder 5 for boom raising and lowering is suspended, and the space between the hydraulic cylinder mounting frame 13 for boom raising and lowering mounted on the upper swivel 2 and the boom mounting frame 7 has a margin compared to the length of the inserted pin, The pins are inserted into the two pin holes from the lateral direction to assemble them. As described above, conventionally, a boom-lift hydraulic cylinder mounting block having a boom-lift hydraulic cylinder mounting frame mounted thereon for mounting the boom-lift hydraulic cylinder on the upper swivel. A method of attaching bolts to the upper revolving base using a bolt, or a method of directly mounting a hydraulic cylinder mounting frame for boom undulation to the upper revolving base without welding using the mounting block, and attaching the hydraulic cylinder for boom undulation to this Has been adopted. However, the method of mounting bolts on the upper swivel using the hydraulic cylinder mounting block for boom hoisting requires machining of the bolt holes in the upper swivel, and it is necessary to drill the bolt holes in the correct position of the upper swivel. Difficult and costly. In the method of directly mounting the boom raising hydraulic cylinder mounting frame 13 on the upper turning table by welding or the like, the distance between the boom raising hydraulic cylinder mounting frame 13 mounted on the upper turning table 2 and the boom mounting frame 7 is increased. If there is no room for the length of the pin to be inserted, a pin hole on the base end side of the hydraulic cylinder 5 for boom raising and lowering, and a pin hole provided on the boss 14 of the hydraulic cylinder mounting frame 13 for boom raising and lowering are provided. It is extremely difficult to assemble the two by inserting the pins into the pins. [0010] In recent years, work vehicles have become larger as work has become larger, and fuel tanks have become larger in order to work for a long time, and the telescopic boom has also become larger as work has become larger. Correspondingly, hydraulic cylinders for expansion and contraction and ups and downs have also been increased in size, and a larger hydraulic oil tank is required. For this reason, each tank is also enlarged, and the interval l between the tanks is becoming narrower with the enlargement. Further, the diameter of a pin for mounting a large-sized hydraulic cylinder for raising and lowering a boom on a frame for mounting the hydraulic cylinder for raising and lowering a boom is large and long. On the other hand, the width of the upper swivel 2 on which these are placed is almost the limit of the regulation by the law, and it is difficult to further increase the width in the vehicle width direction. Before the enlargement, even if the hydraulic cylinder for raising and lowering the boom was attached to the same mounting frame, there was room for the work space for that, but it was difficult to secure such a space with the enlargement, and therefore, It is very difficult to insert and remove pins between limited frames. On the other hand, due to wear and breakage due to long-term use of the aerial work vehicle, there are occasional repairs and replacements of members and parts, and periodic inspections. Once you remove components and parts, repair or replace,
Inspect and then reassemble. In particular, in order to remove this enlarged boom lifting hydraulic cylinder from the mounting frame during maintenance work such as repair, replacement, inspection, etc., the tank installed outside the boom mounting frame must be installed The work can only be performed after removing all the parts once to create a work space, and it is very difficult to re-install the work, such as removing and inserting pins between narrow frames. Pins that have become larger due to the increase in the size of the members must be inserted into the pin holes of both the base end of the hydraulic cylinder for raising and lowering the boom and the mounting frame from the lateral direction that is the same direction as the axis of the pin holes. Therefore, it was necessary to secure a work space for this. Conventionally, there is no fixed space as a utility space for tools for repair and repair.
Since the tools were scattered at appropriate places on the swivel table, the tools could not be managed sufficiently, causing inconvenience. For this reason, it is necessary to centrally manage and store these tools. In view of the above, the present invention has been made in view of the above-mentioned problem. In order to facilitate the work of removing and inserting pins between narrow frames during maintenance work, a pin is attached to the boom mounting frame on the tank side. A maintenance work hole for insertion and removal is provided, and at the same time, a gap L for pin removal and maintenance is secured between the fuel tank and the operation tank. It is intended to be a kind of utility space. [0015] In order to achieve the above object, an invention according to claim 1 is provided in an upper rotating body of a construction machine.
Boom provided between a pair of mounted boom mounting frames
Use the mounting pins on the hydraulic cylinder mounting frame
Construction to install hydraulic cylinders for boom hoisting
The mounting structure of the machine boom
Boom mounting on the side where the fuel tank and hydraulic oil tank are placed
Maintenance frame for inserting and removing mounting pins from the mounting frame.
Provide a working hole, between the fuel tank and the hydraulic oil tank
A space for maintenance work is formed and the maintenance work is performed.
When the industrial space is not used for maintenance work,
Said work to use as utility space
That can be opened and closed in the space for
Things . DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an aerial work vehicle according to the present invention will be described below with reference to the drawings. FIG. 1 shows an aerial work vehicle equipped with a mounting structure for a boom hoist cylinder according to the present invention. FIG. 3 is a plan view showing the arrangement of each member of the aerial work vehicle of the present invention, and FIG. 4 is a plan view showing the arrangement of each member of the aerial work vehicle of the present invention. It is a side view which shows arrangement | positioning of a member. Reference numeral 2 denotes an upper swivel mounted on the traveling device 1 of the aerial work vehicle. A pair of boom mounting frames 7, 7 are mounted on the upper swivel 2 at an interval. ing. One of the mounted boom mounting frames 7, 7 has a boom mounting frame 7,
A maintenance work hole 20 is formed. Then, the boom mounting frame 7 mounted on the upper swivel 2,
7, a pair of hydraulic cylinder mounting frames 13, 13 for raising and lowering the boom are welded and mounted on the upper swivel 2 at an interval. The boss 1 of the hydraulic cylinder mounting frames 13, 13 attached to the upper swivel 2 for raising and lowering the boom.
The pin holes provided in the boom mounting frame 7 are aligned with the pin holes provided in the boom mounting frame 7 by aligning the pin holes provided in the boom lifting hydraulic cylinder 5 suspended by the crane with the pin holes provided in the boom mounting frame 7. A mounting pin 18 is inserted from the lateral direction through a working hole 20, and a retaining pin 19 is attached to the tip of the mounting pin 18 to prevent the mounting pin 18 from dropping out of the boom-raising hydraulic cylinder mounting frame 13. 5 is mounted on the hydraulic cylinder mounting frames 13, 13 for raising and lowering the boom. The pin holes provided at the base end of the telescopic boom 4 (not shown) suspended by the crane are aligned with the pin holes provided at the bosses 8 of the boom mounting frames 7,7. Then, mounting pins are inserted into these pin holes, and the telescopic boom 4 is mounted on the mounting frame 7. And the bracket 6 of the telescopic boom 4
Then, the tip of a hydraulic cylinder 5 for boom raising and lowering mounted on the boom raising and lowering hydraulic cylinder mounting frames 13 and 13 mounted on the upper swivel 2 is mounted. Further, outside the boom mounting frame 7 in which the maintenance work hole 20 is formed, various control and operating devices (not shown) and the fuel tank 10 and the hydraulic oil tank 11 are separated by a distance L. On the upper swivel 2. Also, on the outside of the other boom mounting frame 7,
An engine 9 and an emergency generator (not shown) are installed. As described above, since the fuel tank 10 and the hydraulic oil tank 11 are provided with the space L therebetween, this space can be used as a tool utility space for storing tools. Also, this upper swivel 2
Various control operation devices installed in the fuel tank 10,
The surroundings and upper parts of the hydraulic oil tank 11, the engine 9, the emergency generator, and the like are covered with a building cover for protection and aesthetics. The fuel tank 10 and the hydraulic oil tank 1
An openable / closable cover 21 is provided on the side surface on which 1 and the like are placed. The open / close of the openable / closable cover 21 allows inspection of the fuel tank 10, the hydraulic oil tank 11, etc. Tools and the like are taken out from the utility space. The telescopic boom 4 installed on the upper swivel 2 in this manner is extended and contracted in the length direction by a boom extending and retracting hydraulic cylinder (not shown), and the upper and lower extensible hydraulic cylinder 5 is extended and retracted. A work floor called a gondola 3 is attached to the tip of the telescopic boom 4 that can be raised and lowered with respect to the table 2. A worker rides on top of it, and the upper turntable 2 on the ground
Various operations can be performed at high altitudes by setting the gondola 3 to a required position by operating the control device provided above or remotely controlling the control device from the operation device provided on the gondola 3. Next, the repair and replacement work of the hydraulic cylinder 5 for raising and lowering the boom and the periodic inspection work will be described. First, the telescopic boom 4 is lifted by a crane, and the telescopic boom 4 is mounted on a suitable support base. At the same time, the retaining pin 19 attached to the tip of the mounting pin 18 on which the base end of the hydraulic cylinder 5 for boom undulation is mounted on the frame 13 for mounting the hydraulic cylinder for boom undulation is removed. Next, the fuel tank 10 and the hydraulic oil tank 1
Various tools stored in the tool utility space provided at an interval L with respect to 1 are removed, the tool utility space without these tools is used as a working space, and the working space is used to form the boom mounting frame 7. The mounting pin 18 is pulled out laterally through the maintenance work hole 20 and the boom-lift hydraulic cylinder mounting frame 13 and the base end of the boom-lift hydraulic cylinder 5 are removed. Then, while lifting the hydraulic cylinder 5 for raising and lowering the boom with a crane, the bracket 6 of the telescopic boom 4 is disconnected from the tip of the hydraulic cylinder 5 for raising and lowering the boom, and the hydraulic cylinder 5 for raising and lowering the boom is transferred to another place. Then, after repairing or replacing the hydraulic cylinder 5 for raising or lowering the boom, or performing a regular inspection, the hydraulic cylinder 5 is transferred again to an aerial work vehicle and then lifted by a crane. After the positioning with the pin holes, the mounting pins 18 are inserted from the lateral direction through the maintenance operation holes 20 formed in the boom mounting frame 7 into these pin holes, and the retaining pins 19 are attached to the ends thereof to mount. The pin 18 is prevented from falling off from the mounting frame 13 for the boom-lifting hydraulic cylinder, and the boom-lifting hydraulic cylinder 5 is connected to the boom-lifting hydraulic cylinder. It is attached to the mounting frame 13, 13. Then, the front end of the hydraulic cylinder 5 for boom raising and lowering is mounted on the bracket 6 of the telescopic boom 4. After the tools are stored in the tool utility space again, various operations can be performed again as the aerial work vehicle. As described above, the construction machine of the present invention
The mounting structure of the boom hoist cylinder is
Boom mounting frame on the side where the hydraulic oil tank is placed
A hole for maintenance work is provided in the
Insertion and removal of mounting pins when replacing or repairing pressure cylinders
Is easily performed from the lateral direction, which is the axial direction of the pin hole.
Align the mounting pin holes on the bottom side of the
Set the cylinder, and from the side of the frame
Installing pins through holes, hydraulic for raising and lowering the telescopic boom
Removing the mounting pin when replacing, repairing, or inspecting the cylinder
Insertion can be performed easily, and
The space between the fuel tank and the hydraulic oil tank was widened.
Replacement and repair of hydraulic cylinders for raising and lowering the telescopic boom
As a work space when inserting and removing mounting pins during inspection
Not only for maintenance work but also for
Tools that were scattered on the revolving superstructure
Utility for centralized storage and management of space
Can be used as a storage space.
Play .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view in which a telescopic boom of an aerial work vehicle is contracted and a gondola is lowered on the ground; FIG. 2 is a plan view showing an arrangement of members of a conventional aerial work vehicle; FIG. 3 is a plan view showing an arrangement of each member of the aerial work vehicle of the present invention. FIG. 4 is a side view showing an arrangement of each member of the aerial work vehicle of the present invention. [Description of Signs] 1 traveling device, 2 upper swivel, 3 gondola,
4 Telescopic boom, 5 hydraulic cylinder for raising and lowering the boom,
6 Bracket, 7 Boom Mounting Frame, 8 Boss, 9 Engine, 10 Fuel Tank, 11 Hydraulic Oil Tank, 12 Hydraulic Cylinder Mounting Block for Boom Raising, 13 Hydraulic Cylinder Mounting Frame for Boom Raising, 14 Boss, 15 Bolt, 16 Boom Raising Base part of hydraulic cylinder for use, 17 boss, 18 mounting pin, 19 retaining pin, 20 maintenance work hole, 21 opening / closing cover.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hosuke Hoshino 650, Kunitachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (56) References JP-A-4-34126 (JP, A) 10-18347 (JP, A) Japanese Utility Model Showa 59-83889 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66F 9/22 B66C 23 / 44,23 / 64,23 / 82 E02F 9/00, 9/14

Claims (1)

(57) [Claims 1] A pair of upper revolving superstructures of a construction machine
Boom raising / lowering hydraulic pressure installed between boom mounting frames
Boom up / down with mounting pin on cylinder mounting frame
Of a construction machine with a hydraulic cylinder
The mounting structure of the cylinder
Boom mounting frame on the side where the hydraulic oil tank is placed
Maintenance holes for inserting and removing mounting pins.
Maintenance work between the fuel tank and the hydraulic oil tank.
And a space for the maintenance work.
Tools other than maintenance work.
Working space for use as a safety space
Construction machine characterized by having a cover that can be opened and closed
Boom hoist cylinder mounting structure .