JP7264557B1 - Elevating crawler work vehicle - Google Patents

Abstract

An object of the present invention is to provide an elevating crawler work vehicle having a structure in which a cab can be maintained horizontally on a slope or the like.
A crawler traveling body (12), an upper working part (13) provided on the upper part of the crawler traveling body (12), and an upper working part (13) provided between the upper working part (13) and the crawler traveling body (12) so that the upper working part (13) can be raised and lowered. The crawler traveling body 12 has a right crawler traveling portion 17a and a left crawler traveling portion 12b provided on the left and right sides of the crawler traveling body 12. , the elevating mechanism 15 includes a right elevating mechanism (front right elevating mechanism 51, rear right elevating mechanism 52) that connects the right crawler traveling portion 17a and the upper working portion 13 to enable the upper working portion to be elevated, and a left crawler. It has a left elevating mechanism (a front left elevating mechanism 53 and a rear left elevating mechanism 55) that connects the traveling portion 17b and the upper working portion 13 to enable the upper working portion 13 to be raised and lowered.
[Selection drawing] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating crawler work vehicle capable of keeping a driver's seat horizontal during work on slopes, mountains, or the like.

2. Description of the Related Art Conventionally, a cab device for construction machinery, etc., disclosed in Patent Document 1 is known. In this operator's cab apparatus for construction machinery, etc., the operator's cab is raised and lowered by a hydraulic cylinder and a chain, and the operator's cab and carrier are supported at three points by hooks and eccentric rollers. . As a result, it is possible to quickly raise and lower the operator's cab, visually confirm the condition of the work site, improve safety, and prevent rocking to maintain the horizontal position.

JP-A-7-331701

By the way, at civil engineering and construction sites, there are undulating areas such as mountainous areas and steep slopes. work becomes difficult and work efficiency decreases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevating crawler work vehicle having a structure in which the driver's cab can be maintained horizontally even on a slope and the surroundings can be viewed. .

In order to solve the above-described problems, an elevating crawler work vehicle according to the present invention includes a crawler traveling body, an upper working section provided on the upper part of the crawler traveling body, and the upper working section and the crawler traveling body. an elevating mechanism provided between and capable of elevating the upper working section, wherein the crawler traveling bodies include a right crawler traveling section and a left crawler traveling section provided in a pair of left and right crawler traveling sections; a right elevating mechanism that connects the right crawler traveling section and the upper working section to enable the upper working section to be raised and lowered; and the left crawler traveling section and the upper working section. and a left elevating mechanism that connects the upper working part and allows the upper working part to be raised and lowered.

According to such a configuration, even when the elevating crawler work vehicle is tilted during felling work in a mountainous area, civil engineering work on a slope, or the like, the right elevating mechanism or the left elevating mechanism can be operated. Since the upper working part can be maintained horizontally, the visibility of the operator can be improved and safety can be ensured. When the elevating crawler work vehicle is tilted with its right side down, the right elevating mechanism is raised by a predetermined length according to the degree of inclination to maintain the upper working section horizontally, and the elevating crawler work vehicle is tilted with its left side down. When the upper working part is tilted, the left lifting mechanism is operated in the same manner to keep the upper working part horizontal. In addition, it is possible to widen the field of view by raising both the right lifting mechanism and the left lifting mechanism, and further adjust the degree of elevation on the left and right to widen the field of view while maintaining horizontality.

In the elevating crawler work vehicle according to the present invention, the right elevating mechanism connects a front portion of a right traveling portion frame of the right crawler traveling body and the upper working portion to enable the upper working portion to be raised and lowered. a rear right elevating mechanism, a rear right elevating mechanism that connects the rear portion of the right traveling section frame of the right crawler traveling body and the upper working section so that the upper working section can be raised and lowered, and a left side of the left crawler traveling body. a front left side lifting mechanism that connects the front part of the traveling part frame and the upper working part so that the upper working part can be raised and lowered; and a rear part of the left traveling part frame of the left crawler traveling body and the upper working part. and a rear left elevating mechanism that connects the upper working section so that the upper working section can be lifted and lowered.

According to such a configuration, the upper working section can be held in a horizontal state not only against the lateral inclination of the elevating crawler work vehicle, but also against the longitudinal inclination. . For example, when the elevating crawler work vehicle is tilted (upward or downward) in the forward direction, the upper working section can be held in a horizontal state by raising and lowering the front right elevating mechanism and the front left elevating mechanism. can. In addition, when there is an inclination (upward or downward) in the direction of backward travel, the upper working section can be held in a horizontal state by raising and lowering the rear right lifting mechanism and the rear left lifting mechanism.

In the elevating crawler work vehicle according to the present invention, one end of each of the front right elevating mechanism, the rear right elevating mechanism, the front left elevating mechanism, and the rear left elevating mechanism is included in the upper working section. a first link member pivotally attached to a chassis frame provided at the bottom of the section, and the other end of the first link member pivotally attached to the other end of the first link member, and the other end of the right traveling section frame or the left traveling section a second link member pivoted to a frame; a uniaxially expandable actuator having one end pivoted to the chassis frame and the other end pivoted to the first link member; The frame may include a second actuator that is uniaxially extendable and whose other end is pivotally attached to the second link member.

According to such a configuration, the right lifting mechanism, the rear right lifting mechanism, the front left lifting mechanism, and the rear left lifting mechanism lifting mechanism include the first link member, the second link member, the first actuator, and the second lift mechanism. Since the first actuator and the second actuator are rotatably pivoted, the up-and-down motion of the upper working section can be controlled by expanding and contracting the first actuator and the second actuator. Hydraulic cylinders, pneumatic cylinders, electric cylinders, and the like correspond to actuators that can expand and contract in one axial direction.

In the elevating type crawler work vehicle according to the present invention, the first actuator has a main body portion whose end is pivotally attached to the chassis frame, and a rod portion whose end is pivotally attached to the first link member. wherein the second actuator is a second hydraulic cylinder in which the end of the body portion is pivotally attached to the chassis frame and the end of the rod portion is pivotally attached to the second link member can be configured.

According to such a configuration, since the first and second actuators are hydraulic cylinders, it is possible to exert strong force and torque in a small size, and to accumulate energy. has the advantage of enabling the use of In particular, when the elevating crawler work vehicle is hydraulically operated, the efficiency is improved by using a hydraulic cylinder.

In the elevating crawler work vehicle according to the present invention, the elevating motions of the front right elevating mechanism, the rear right elevating mechanism, the front left elevating mechanism, and the rear left elevating mechanism are performed by the predetermined front right elevating mechanism. It is possible to adopt a configuration in which the lifting is performed based on a combination pattern of lifting and lowering of the mechanism, the rear right lifting mechanism, the front left lifting mechanism, and the rear left lifting mechanism.

According to such a configuration, since the lifting is performed based on the combination pattern of the lifting mechanisms, the operator can select and operate the appropriate lifting combination pattern. For example, when it is desired to raise the right side of the elevating crawler work vehicle, a combination of the front right elevating mechanism and the rear right elevating mechanism can be selected, and both lifting operations can be performed at once. Operation can also be performed with a wireless or wired remote control device.

According to the present invention, even when the elevating crawler work vehicle is in a tilted state, the upper working part can be maintained horizontally by operating the elevating mechanism, and the surroundings can be overlooked, resulting in a good field of vision for the operator. safety can be ensured.

FIG. 1 is a front view of an elevating power shovel (elevating crawler work vehicle) according to an embodiment of the present invention. FIG. 2 is a view of the operation room, etc. of the elevating power shovel in FIG. It is a thing. FIG. 3 is a schematic system diagram showing piping and wiring of the elevating power shovel of FIG. FIG. 4 is a schematic diagram of a wireless remote controller for operating the lifting mechanism of the excavator of FIG. FIG. 5 is a view from the front side in the traveling direction of a state in which the upper working section is lifted by the lifting mechanism of the lift-type power shovel of FIG. FIG. 6 is a view of the operation room and the like of the elevating power shovel in FIG. 5 swiveled forward, viewed from the right side in the traveling direction. It is a thing. FIG. 7 is a diagram showing a state in which the rear right lifting mechanism and the rear left lifting mechanism of the lift-type excavator of FIG. 2 are lifted. FIG. 8 is a diagram showing a state in which the front right lifting mechanism and the rear right lifting mechanism of the lift-type power shovel of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a view of an elevating power excavator (elevating crawler work vehicle) according to an embodiment of the present invention as seen from the front side in the traveling direction, and FIG. FIG. 3 is a view of the rotating machine viewed from the right side in the traveling direction, and the traveling mechanism and the lifting mechanism are viewed from the direction of arrow X1 in FIG. 1. FIG. 4 is a schematic diagram of a radio remote control device for operating the lifting mechanism of the power shovel of FIG. 1; FIG. FIG. 6 is a view of the raised state seen from the front side in the direction of travel, and FIG. 6 is a view of the operation room of the lifting power shovel in FIG. The elevating mechanism is viewed from the direction of arrow X2 in FIG. 5. FIG. 7 is a diagram showing a state in which the rear right elevating mechanism and the rear left elevating mechanism of the elevating excavator in FIG. 2 are raised, and FIG. FIG. 2 is a diagram showing a state in which the front right lifting mechanism and the rear right lifting mechanism of the lift-type power shovel in FIG.

As shown in FIGS. 1 and 2, an elevating power shovel 11 (elevating crawler work vehicle) according to the embodiment of the present invention includes a crawler body 12 that travels by crawlers (tracks) and an upper portion of the crawler body 12. and an elevating mechanism 15 provided between the upper working part 13 and the crawler traveling body 12 for enabling the upper working part 13 to be raised and lowered with respect to the crawler traveling body 12 .

As shown in FIG. 1, which is a front view of the elevating power shovel 11, the crawler traveling body 12 includes a right crawler traveling portion 17a on the right side in the forward direction of the elevating power shovel 11 and a left crawler traveling portion 17a on the left side in the forward direction. and a portion 17b. The forward direction in FIG. 1 is the vertical direction toward the front side of the paper, and the forward direction in FIG. 2 is the direction from left to right on the paper. The right crawler running portion 17a and the left crawler running portion 17b drive the crawlers 20a and 20b by hydraulic motors 18a and 18b, respectively, so that the lifting power shovel 11 runs.

As indicated by an arrow X1 in FIG. 1, the left crawler traveling portion 17b will be described in FIG. The right crawler running portion 17a also has the same structure. The left crawler traveling portion 17b mainly includes a driving wheel 22b driven by a hydraulic motor 18b having a hydraulic power source on the front side, a driven wheel 23b provided on the rear side, five lower rollers 26b therebetween, and a left running portion frame 25b that arranges them side by side in the front-rear direction. The distance between the centers of the driving wheel 22b and the driven wheel 23b is 2800 mm. As described above, for the right crawler running portion 17a, the driving wheels 22a are similarly driven by the hydraulic motor 18a, and the driven wheels 23a and the lower rollers 26a are provided on the right running portion frame 25a. The right running portion frame 25a and the left running portion frame 25b are long members having a rectangular cross section.

The upper working section 13 mainly includes a working machine device 31 for raking up earth and sand, an operation room 32 for operating the working machine device 31, the crawler traveling section 12, and the like, and an opportunity for storing various devices. It is composed of a main body 33, a revolving section 35 for revolving the operation chamber 32, the work machine device 31 and the machine main body 33, and a chassis frame 36 on which the revolving section 35 is provided.

The work machine device 31 includes a bucket 37 for excavating and loading earth and sand, an arm 38 pivotally attached to the bucket 37 , a boom 41 pivotally attached to the arm 38 , and a bucket cylinder for rotating the bucket 37 . 42 , an arm cylinder 43 that rotates the arm 38 , and a boom cylinder 45 that rotates the boom 41 . One end of the boom 41 is pivotally attached to the machine body 33 and the other end is pivotally attached to the arm 38 . The bucket cylinder 42 , the arm cylinder 43 and the boom cylinder 45 described above are hydraulic cylinders that expand and contract by hydraulic pressure to rotate the bucket 37 , the arm 38 and the boom 41 .

The operation chamber 32 is provided with a control valve mechanism 39 (see FIG. 3), which is a control valve for operating the working machine device 31, the crawler traveling portion 12, and the revolving portion 35. It has the function of controlling the flow direction. A wireless remote controller 28 (see FIG. 4) for wirelessly operating the lifting mechanism 15, which will be described later, is also provided. In addition, the machine body 33 includes a hydraulic pump 46 for pressurizing hydraulic oil, an engine 47 for driving the hydraulic pump 46, a hydraulic oil tank 48, a revolving portion hydraulic motor 50, and a counter for balancing with the work machine device 31. A weight (not shown) or the like is provided (see FIG. 3).

Since the operation chamber 32, the work machine device 31, and the machine main body 33 rotate 360 degrees, a swivel joint ( (not shown) are provided. The swivel portion 35 is provided on a square chassis frame 36 having a predetermined thickness.

The elevating mechanism 15 includes a front right elevating mechanism 51 and a rear right elevating mechanism 52 that are right elevating mechanisms, and a front left elevating mechanism 53 and a rear left elevating mechanism 55 that are left elevating mechanisms. Since the right side lifting mechanism and the left side lifting mechanism have the same device configuration, as shown in FIG. The mechanism 51 and the rear right lifting mechanism 52 are omitted.

The front left lifting mechanism 53 includes a rod-shaped first link member 61a whose one end is pivotally attached to the chassis frame 36, the other end of the first link member 61a and one end of which is pivotally attached, and the other end of which is the left traveling portion. A rod-shaped second link member 61b pivotally attached to the frame 25b, and a first link member 61b whose end of the main body is pivotally attached to the chassis frame 36 and whose rod end is pivotally attached to the first link member 61a. , and a second hydraulic cylinder 63b ( a second actuator); A pin member is used for the bearing.

The rear left lifting mechanism 55 includes a rod-shaped first link member 65a whose one end is pivotally attached to the chassis frame 36, the other end of the first link member 65a and one end of which is pivotally attached, and the other end of which is attached to the left traveling portion frame. A rod-shaped second link member 65b pivotally attached to 25b, and a first link member 65b whose main body end is pivotally attached to the chassis frame 36 and whose rod end is pivotally attached to the first link member 65a. A hydraulic cylinder 66a (first actuator) and a second hydraulic cylinder 66b (second actuator) having an end of the main body pivotally attached to the chassis frame 36 and an end of the rod portion pivotally attached to the second link member 65b. 2 actuators). A pin member is used for the shaft attachment in the same manner as described above. The front right lifting mechanism 51 and the rear right lifting mechanism 52 are similarly configured.

The front left lifting mechanism 53 and the rear left lifting mechanism 55 expand and contract vertically as the link members 61a, 61b, 65a and 65b rotate due to the expansion and contraction of the hydraulic cylinders 63a, 63b, 66a and 66b. Therefore, by extending and contracting the hydraulic cylinders of the front right lifting mechanism 51, the rear right lifting mechanism 52, the front left lifting mechanism 53, and the rear left lifting mechanism 55, the upper working part 13 can be lifted and lowered. By partially elevating the right elevating mechanism 51, the rear right elevating mechanism 52, the front left elevating mechanism 53, and the rear left elevating mechanism 55, the front part of the upper working unit 13 can be elevated, the rear elevate, the right elevate, or It is possible to move up and down on the left side, and it is possible to maintain the horizontality of the upper working section 13 even on a slope by selecting a combination of the lifting mechanisms.

Next, referring to FIGS. 3 and 4, an outline of piping and wiring of the elevating power excavator 11 (elevating crawler work vehicle) according to the present embodiment, and a radio remote control device for operating the elevating mechanism of the power excavator 11. will be explained. As shown in FIG. 3 , the operation of traveling, working, turning, and ascending/descending of the elevating power shovel 11 is performed by the hydraulic oil supplied by the hydraulic pump 46 . A hydraulic pump 46 is mechanically connected to an engine 47 (diesel engine or gasoline engine) to pressurize hydraulic oil. Hydraulic oil supplied by the hydraulic pump 46 is supplied to the working equipment hydraulic cylinders 40 (the bucket cylinder 42, the arm cylinder 43, the boom cylinder 45) through the control valve mechanism 39 that controls the flow rate, flow direction, etc. ), the traveling portion hydraulic motor 18 (hydraulic motors 18a and 18b), and the turning portion motor 50 are driven.

Lifting mechanism hydraulic cylinders 60 (first hydraulic cylinder 63a, second hydraulic cylinder 63b of front left lifting mechanism 53, first hydraulic cylinder 66a, second hydraulic cylinder 66a of rear left lifting mechanism 55) The cylinder 66b, the first hydraulic cylinder and the second hydraulic pressure (not shown) of the front right lifting mechanism 51 and the rear right lifting mechanism 52 are also driven by hydraulic fluid from the hydraulic pump. Since a hydraulic cylinder is used for lifting, an electromagnetic valve 72 for hydraulic pressure is provided on the chassis frame 36 in addition to a normal hydraulic swivel (not shown). To drive the solenoid valve 72, an electricity supply slip ring (not shown) for operating the solenoid valve is arranged at the center of the rotation to supply electricity, and the sequence circuit and the solenoid valve are operated. The communication unit 73 receives communication from the wireless remote controller 28 (see FIG. 4), and the control unit 75 controls the operation of the electromagnetic valve 72 . Hydraulic oil that has driven the lifting mechanism hydraulic cylinder 60, the work machine hydraulic cylinder 40, the travel section hydraulic motor 18, and the revolving section motor 50 returns to the hydraulic oil tank 48 and is further pressurized by the hydraulic pump 46 and circulated.

As shown in FIG. 4, the wireless remote control device 28 is provided with a switch for each lifting pattern. The A (all 4) switch 81 is a switch for simultaneously operating the front right elevating mechanism 51, the rear right elevating mechanism 52, the front left elevating mechanism 53, and the rear left elevating mechanism 55, and the B (front 2) switch. 82 is a switch for simultaneously operating the front right lifting mechanism 51 and the front left lifting mechanism 53, and the C (rear 4) switch 83 operates the rear right lifting mechanism 52 and the rear left lifting mechanism 55 at the same time. The D (left 2) switch 84 operates the front left elevation mechanism 53 and the rear left elevation mechanism 55 at the same time, and the E (right 2) switch 85 operates the front right elevation mechanism 51 and the rear right elevation mechanism. It is the switch that activates the mechanism 52 . An on/off (ON/OFF) switch 86 for each lifting mechanism is also provided. Further, an operating lever 87 is provided to adjust the degree of elevation. Moving the operating lever 87 to the right will raise the device, and moving it to the left will lower the device. The amount of movement of the operating lever 87 adjusts the degree of elevation. These operations are transmitted by the control section 88 to the communication section 73 and the control section 75 that lead to the operation of the electromagnetic valve 72 via the communication section 89 (see FIG. 3).

Next, referring to FIGS. 3 to 8 for the state in which the elevating mechanism is extended from the contracted state in FIGS. 1 and 2, the elevating operation of the elevating power shovel (elevating crawler work vehicle) according to the present embodiment will be described. explain. FIG. 5 is a diagram showing the upper working section of the lifting power shovel 11 of FIG. 1 raised, and FIG. 6 shows the upper working section of the lifting power shovel of FIG. In the figure, the traveling mechanism and the lifting mechanism are viewed from the direction of arrow X2 in FIG. The on/off (ON/OFF) switch 86 of the wireless remote control device 28 shown in FIG. 4 is pressed to set the lifting operation start state (ON), and the A (all 4) switch 81 is further pressed to move the operation lever 87 in the "extension" direction. 5 and 6, the front right lifting mechanism 51, the rear right lifting mechanism 52, the front left lifting mechanism 53, and the rear left lifting mechanism 55 extend. Specifically, an operation instruction signal is transmitted from the control unit 88 via the communication unit 89 by operating the button and operation lever of the wireless remote control device 28, and when received by the communication unit 93 shown in FIG. The solenoid valve 72 is operated by hydraulic pressure to extend the lifting mechanism hydraulic cylinders 60 (63a, 63b, 66a, 66b), and furthermore, the front right lifting mechanism 51, the rear right lifting mechanism 52, the front left lifting mechanism 53 and the rear The left lifting mechanism 55 is extended.

As shown in FIG. 6, the first hydraulic cylinder 63a and second hydraulic cylinder 63b of the front left lifting mechanism 53 and the first hydraulic cylinder 66a and second hydraulic cylinder 66b of the rear left lifting mechanism 55 are extended. By doing so, the first link members 61a, 65a and the second link members 61b, 65b are also extended, and similarly the front right lifting mechanism 51 and the rear right lifting mechanism 52 (see FIG. 5) are extended by the hydraulic cylinders. The first link member and the second link member (not shown) are also elongated. 5 and 6, the front right elevating mechanism 51, the rear right elevating mechanism 52, the front left elevating mechanism 53, and the rear left elevating mechanism 55 are extended, so that the upper working portion 13 is moved to H1. (940mm: Fig. 1) to H2 (2065mm). Work efficiency can be improved. On a slope or the like, as will be described later, either the right lifting mechanism (front right lifting mechanism 51, rear right lifting mechanism 52) or the left lifting mechanism (front left lifting mechanism 53 and rear left lifting mechanism 55) is used. By further expanding and contracting, the horizontality of the operation chamber 32 can be maintained corresponding to the lateral inclination.

1 and 2 (contracted state), the on/off (ON/OFF) switch 86 of the radio remote control device 28 shown in FIG. ON), and then press the C (rear 2) switch 83 to move the operation lever 87 in the "extension" direction, as shown in FIG. FIG. 7 is a diagram showing a state in which the rear right lifting mechanism and the rear left lifting mechanism of the lift-type power shovel in FIG. is. At this time, when the rear right lifting mechanism and the rear left lifting mechanism 55 are extended, the front right lifting mechanism and the front left lifting mechanism are mounted to avoid contact between the front driving wheels 22b (22a) and the chassis frame . Mechanism 53 extends a predetermined length. However, the extension of the front right lift mechanism and the front left lift mechanism 53 is for avoiding the contact, and is far less than the extension of the rear right lift mechanism 52 and the rear left lift mechanism 55 . As a result, the crawler traveling portion 12 of the elevating power shovel 11 is in a state of elevation angle A1 (30 degrees) with the front side raised.

Specifically, an operation transmitted from the control unit 88 via the communication unit 89 by operating the buttons (ON/OFF switch 86, B (back 2) switch 83) and the operation lever 87 of the wireless remote control device 28 is performed. The instruction signal is received by the communication unit 73 shown in FIG. 3, the solenoid valve 72 is operated by the control unit 75, and as shown in FIG. As the cylinder 66b extends, the first link member 65a and the second link member 65b also extend. Similarly, the first hydraulic cylinder and second cylinder (not shown) of the rear right lifting mechanism 52 are extended, and the first link member and second link member are also extended (not shown). Furthermore, as described above, in order to avoid contact between the driving wheel 22b (22a) and the chassis frame 36, the first hydraulic cylinder 63a, the second hydraulic cylinder 63b, and the front right side of the front left lifting mechanism 53 The first link member and the second link member (not shown) of the lifting mechanism 51 are also slightly extended (to avoid contact between the driving wheels 22b (22a) and the chassis frame 36), as shown in FIG. Thus, the lifting power shovel 11 is in the state of elevation angle A (30 degrees). As a result, it is possible to keep the operation room 32 horizontal and secure visibility in hilly areas, mountainous areas, disaster sites, etc., which have bumps in the direction of travel, thereby ensuring safety during work and improving work efficiency. can.

1 and 2, the B (front 2) switch 82 is pushed instead of the C (rear 2) switch 83 of the radio remote control device 28, and the operating lever 87 is operated. is moved in the "extension" direction, the front left elevation mechanism 53 and the front right elevation mechanism 51 are extended, and the rear side of the elevation power shovel 11 is raised at an elevation angle of 30 degrees (not shown), contrary to the state shown in FIG. ).

1 and 2 (contracted state), the on/off (ON/OFF) switch 86 of the radio remote control device 28 shown in FIG. (ON), and then press the E (right 2) switch 85 to move the operation lever 87 in the "extension" direction, as shown in FIG. FIG. 8 is a view of the lift-type power shovel 11 viewed from the rear.) As a result, the crawler traveling portion 12 of the lift-type power shovel 11 moves from the state shown in FIGS. Since only the right elevating mechanism 52 is extended, the tilt angle is A2 (27 degrees).

To explain the specific procedure, operation instruction signals generated from the control unit 88 via the communication unit 89 by operating the buttons 86, 85 and the operation lever 87 of the wireless remote control device 28 shown in FIG. The signal is received by the unit 73 and the electromagnetic valve 72 is operated by the control unit 75 . Then, as shown in FIG. 8, the first and second cylinders (not shown) of the front right lifting mechanism 51 and the rear right lifting mechanism 52 are extended by hydraulic pressure, and the first link members 90a and 91a and the first link members 90a and 91a extend. 2 link members 90b and 91b are also extended. 1 and 2, only the front right elevating mechanism 51 and the rear right elevating mechanism 52 are extended, and as shown in FIG. There is a difference in height with the crawler traveling part 17b, and the inclination angle is A2 (27 degrees). Visibility can be secured, ensuring safety during work and improving work efficiency. If there is a bump on the right side of the traveling direction, the D (left 2) switch 84 is pressed instead of the E (right 2) switch 85 described above in the wireless remote control device 28 of FIG. By extending the left elevating mechanism 53 and the rear left elevating mechanism 55) and creating a height difference between the right crawler running portion 17a and the left crawler running portion 17b, the operation chamber 32 can be maintained horizontally.

Although the elevating crawler work vehicle of the present invention has been described as an elevating power shovel in the present embodiment, it is not limited to this. A crane truck, a bulldozer, a carrier vehicle, or the like may be used as long as the vehicle has a lifting crawler. Also, the elevating power shovel of the present embodiment is an example, and a blade-equipped power shovel may be used. Also, the crawler (crawler) may be made of metal, rubber, or the like. Furthermore, in the present embodiment, the operation of the elevating mechanism is performed by a wireless remote control device, but it is not limited to this. A wired remote control device may be used, or a device incorporated in the operation unit 71 of FIG. 3 may be used. Furthermore, instead of operating the lifting mechanism with a remote control device, a sensor for detecting the tilt angle of the lifting type power shovel (lifting type crawler work vehicle) may be provided to automatically maintain the horizontality of the operation room or the like. . In this embodiment, the elevating mechanism is hydraulically operated, but it can also be mechanically operated by mechanically transmitting and distributing the power of the engine and performing each operation by winding and unwinding the wire rope with a winch mechanism. good.

Regarding the wireless remote control device 28 for operating the lifting mechanism of the lifting-type power shovel 11 according to the present embodiment, the switch for the lifting combination pattern of each lifting mechanism is provided. The operator may be allowed to select the target of For example, when it is desired to raise the front of the elevating power shovel 11, the operation switch of the front right elevating mechanism 51 and the operation switch of the front left elevating mechanism 53 are selectively pressed down, and the operation lever 87 is operated. The front right lift mechanism 51 and the front left lift mechanism can be extended. In addition, in the present embodiment, four elevating mechanisms are provided: the front right elevating mechanism, the rear right elevating mechanism, the front left elevating mechanism, and the rear left elevating mechanism. Four or more may be sufficient.

Several embodiments and modifications of each part of the present invention have been described above, but these embodiments and modifications of each part are presented as examples and are not intended to limit the scope of the invention. . These novel embodiments described above can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims.

As described above, the elevating crawler work vehicle according to the present invention maintains the upper working part horizontally by operating the elevating mechanism even when the elevating crawler work vehicle is tilted on a slope or the like. Therefore, it is useful as a working vehicle for felling trees in mountainous areas, a working vehicle for working on rugged wasteland, and a working vehicle for disaster sites.

REFERENCE SIGNS LIST 11 lifting type excavator 12 crawler running body 13 upper working unit 15 lifting mechanism 17a right crawler running unit 17b left crawler running unit 18 running unit hydraulic motors 18a, 18b hydraulic motors 22a, 22b drive wheels 23a, 23b driven wheels 25a right running unit Frame 25b Left travel frame 26a, 26b Lower roller 28 Wireless remote control device 31 Work machine device 32 Operation room 33 Machine body 35 Revolving unit 36 Chassis frame 37 Bucket 38 Arm 39 Control valve mechanism 40 Work machine device hydraulic cylinder 41 Boom 43 Arm Cylinder 45 Boom cylinder 46 Hydraulic pump 47 Engine 48 Hydraulic oil tank 50 Revolving section hydraulic motor 51 Front right elevating mechanism 52 Rear right elevating mechanism 53 Front left elevating mechanism 55 Rear left elevating mechanism 60 Lifting mechanism hydraulic cylinders 61a, 65a First 2nd link member 61b, 65b 2nd link member 63a, 66a 1st hydraulic cylinder 63b, 66b 2nd hydraulic cylinder 71 operation part 72 solenoid valve 73 communication part 75 control part 81 A (all 4) switch 82 B (front 2) switch 83 C (rear 2) switch 84 D (left 2) switch 85 E (right 2) switch 86 ON/OFF switch 87 operation lever 88 control unit 89 communication unit 90a, 91a first link member 90b, 91b second 2 link members

Claims (4)

a crawler traveling body, an upper working section provided on the upper part of the crawler traveling body, and an elevating mechanism provided between the upper working section and the crawler traveling body for enabling the upper working section to move up and down;
A lifting crawler work vehicle having
The crawler running body has a right crawler running portion and a left crawler running portion provided in a pair of right and left,
The elevating mechanism includes a right elevating mechanism that connects the right crawler traveling portion and the upper working portion to enable the upper working portion to be raised and lowered, and a right elevating mechanism that connects the left crawler traveling portion and the upper working portion to the upper working portion. a left elevating mechanism capable of elevating the upper working part ,
The right elevating mechanism includes a front right elevating mechanism that connects a front portion of a right traveling section frame of the right crawler traveling section and the upper working section to enable elevation of the upper working section, and a front right elevating mechanism. a rear right elevating mechanism operable independently of the mechanism, connecting a rear portion of a right traveling section frame of the right crawler traveling section and the upper working section to enable the upper working section to be raised and lowered. The left side lifting mechanism includes a front left side lifting mechanism that connects a front portion of the left side traveling portion frame of the left crawler traveling portion and the upper working portion so that the upper working portion can be raised and lowered; a rear left elevating mechanism capable of operating independently of the left elevating mechanism, connecting the rear part of the left traveling section frame of the left crawler traveling section and the upper working section to enable elevating the upper working section; Elevating crawler work vehicle having. One ends of the front right elevating mechanism, the rear right elevating mechanism, the front left elevating mechanism, and the rear left elevating mechanism are included in the upper working section and pivoted on a chassis frame provided below the upper working section. and a second link member having one end pivotally attached to the other end of the first link member and the other end pivotally attached to the right running portion frame or the left running portion frame. a uniaxially extendable actuator having one end pivoted to the chassis frame and the other end to the first link member; and one end to the chassis frame and the other end to the second link member. and a uniaxially telescopic second actuator journalled to the elevating crawler work vehicle of claim 1 . The first actuator is a first hydraulic cylinder in which the end of the body portion is pivotally attached to the chassis frame and the end of the rod portion is pivotally attached to the first link member, and the second actuator. is a second hydraulic cylinder in which the end of the main body portion is pivotally attached to the chassis frame and the end portion of the rod portion is pivotally attached to the second link member. . The lifting operations of the front right lifting mechanism, the rear right lifting mechanism, the front left lifting mechanism, and the rear left lifting mechanism are predetermined to 4. The elevating crawler work vehicle according to any one of claims 1 to 3 , wherein elevating is performed based on a combination pattern of elevating of the left elevating mechanism and the rear left elevating mechanism.

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