JP2013176315A - Semi-crawler type working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact semi-crawler type working vehicle including a storage portion and an operation portion.SOLUTION: An engine driven forest working vehicle 10 includes a pair of right and left crawler type travelling devices 20, a front wheel 30 and a grip portion 40, and operates while going up and down a slope land. The vehicle travels with the front wheel 30 in the forefront when going up a slope land, and travels with the crawler type driving devices 20 in the forefront when going down a slope land. The vehicle includes a pair of vertically turnable arms 45 near the crawler type driving devices 20, and includes the grip portion 40 on the edge of the arm 45. The base end of the arm 45 is rotatably attached to the machine, and a bucket 50 is provided between a pair of the arms 45 and 45, and in the central part of each of the arms 45.

Description

  The present invention relates to a semi-crawler type work vehicle including a pair of left and right crawler type traveling devices provided at a rear part, a front wheel of one wheel provided at a front part, and a working part provided at a rear part.

  A tractor as a conventional semi-crawler type work vehicle includes a pair of left and right front wheels and a pair of left and right crawler type traveling devices at the rear. The crawler type traveling device includes one drive wheel provided in the upper part, one driven wheel provided in the lower part, and one tension roller provided in the lower part. A crawler belt is wound around the driving wheel, the driven wheel, and the tension roller so as to circumscribe them. In such a crawler type traveling device, the crawler belt between the driven wheel and the tension roller is grounded. Further, a crawler type traveling device is rotatably attached around the rotation axis of the drive wheel.

JP 2006-335240 A

  When such a semi-crawler type work vehicle is applied to forest work, it is required to be compact because it travels between trees. On the other hand, in forest work, in addition to gripping claws (working section) for transporting logs, a chain saw for cutting trees and a storage section for transporting other work materials to the logging site are required. . Providing such a storage unit in a compact semi-crawler work vehicle has a problem of increasing the size of the vehicle. Then, this invention is providing the compact semi-crawler type work vehicle which has an accommodating part and a working part.

For this reason, the invention according to claim 1 comprises a pair of left and right crawler type traveling devices provided at the rear part,
A front wheel for the front,
It is composed of a working unit provided for the rear part,
An engine-driven semi-crawler type work vehicle that works by going up and down slopes,
When going up the slope, start with the front part,
A semi-crawler type work vehicle that travels with the rear portion at the top when descending the slope,
The rear portion includes a pair of arms that can be pivoted up and down,
A semi-crawler type work vehicle provided with the working portion at the tip of the arm,
The base end of the arm is pivotally attached to the fuselage,
A storage portion is provided between the pair of arms and in the central portion of each arm.

The invention according to claim 2 is the semi-crawler type work vehicle according to claim 1, wherein the work part is a grip part for gripping wood,
When the arm is rotated upward, the gripping portion is located immediately above the crawler type traveling device.

  According to a third aspect of the present invention, in the semi-crawler type work vehicle according to the first or second aspect, the storage portion can always maintain a horizontal level.

  According to the first aspect of the present invention, it is composed of a pair of left and right crawler type traveling devices provided at the rear part, a front wheel provided at the front part, and a working part provided at the rear part. An engine-driven semi-crawler type work vehicle for working, which is a semi-crawler type work vehicle that travels with the front as the head when going up the slope and the rear as the head when going down the slope. A semi-crawler-type work vehicle having a pair of arms that can be turned up and down and having the working portion at a tip of the arms, the base end of the arm being rotatably attached to the airframe, A storage portion is provided between the pair of arms and in the central portion of each arm.

  By providing the storage unit between the arms, a compact semi-crawler work vehicle having both the storage unit and the working unit can be provided without increasing the size of the vehicle. Further, the arm can be used for mounting the working part and the storage part, and the number of parts can be reduced.

  According to a second aspect of the present invention, the work section is a semi-crawler type work vehicle that is a grip section for gripping wood, and when the arm is rotated upward, the grip section is the crawler type. It is located directly above the traveling device. Therefore, when grasping the felled timber, the arm is lowered so that the gripping part is located at the front lower side of the machine body, and when carrying the grabbed timber, the arm is raised and the gripping part is located immediately above the crawler type traveling device. . For this reason, the weight of the wood gripped by the gripping portion is loaded on the crawler traveling device, and the ground pressure of the crawler traveling device can be increased. Therefore, the crawler type traveling device can be prevented from slipping during traveling, and a semi-crawler type working vehicle with improved traveling performance can be provided. Furthermore, the weight of the wood gripped by the gripping part is loaded on the crawler type traveling device, so that the center of gravity position of the aircraft is on the rear wheel side compared to the gripping part being located in front of the crawler type traveling device. Become. For this reason, it is possible to prevent the rear wheels from floating.

  According to the third aspect of the present invention, since the storage unit can always keep horizontal, a device such as a motor controller or an article such as liquid or soil that is not preferably tilted is stored in the storage unit. Can do.

1 is a side view of a forest work vehicle as an example of a semi-crawler work vehicle according to the present invention. FIG. It is a figure which shows the detail of a holding part, (a) is a front view, (b) is a side view. It is a figure for demonstrating a mode that a log is conveyed by a holding part, (a) is a figure which shows a mode that an arm is lowered and grips a log, (b) is a figure which shows a mode that a arm is raised and a log is conveyed. is there.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. In this specification, “front” of the semi-crawler type work vehicle refers to the crawler type traveling device side, “rear” of the semi-crawler type work vehicle refers to the rear wheel side, and “left and right” refers to the front. It shall refer to “left and right”.

  FIG. 1 shows a side view of an unmanned forest work vehicle 10 as an example of a semi-crawler work vehicle of the present invention, and FIG. 2 shows a plan view thereof. The forest work vehicle 10 includes a pair of left and right chassis S, a pair of left and right crawler type traveling devices 20 provided at the rear, a front wheel 30 provided at the front, a gripping part (working part) 40 provided at the rear, and a bucket. 50 (working unit). Note that frames S1, S2, S3, and S4 are fixed to the chassis S.

  The crawler type traveling device 20 includes one driving wheel 21 provided in the upper part, one driven wheel 22 provided in the lower part, one tension roller 23 provided in the lower part, and an auxiliary roller between the driven wheel 22 and the tension roller 23. 24, 24. Then, the crawler belt 25 is wound around the drive wheel 21, the driven wheel 22, the tension roller 23, and the auxiliary rollers 24 and 24. Reference numeral 21A denotes a drive shaft, reference numeral 22A denotes a driven shaft fixed shaft, and reference numeral 23A denotes a tension roller fixed shaft. The drive shaft 21A rotates and the fixed shafts 22A and 23A do not rotate. Accordingly, the drive wheel 21 rotates together with the drive shaft 21A, the driven wheel 22 is driven to rotate around the fixed shaft 22A, and the tension roller 23 is driven to rotate around the fixed shaft 23A. The driven wheel 22 and the tension roller 23 are rotatably attached to the attachment frame 26. The crawler type traveling device 20 is provided symmetrically.

  A portion of the crawler belt 25 between the driven wheel 22 and the tension roller 23 is grounded. Further, the crawler type traveling device 20 is rotatable around the drive shaft 21A of the drive wheel 21.

  The front wheel 30 is composed of a tire and a wheel, and is rotatable around an axle 31 provided at the center of the front wheel 30. The front wheel 30 is supported by a front wheel bracket 32 via an axle 31. The front wheel bracket 32 is rotatably attached to the support portion 33. The support portion 33 is formed in a cylindrical shape and is fixed on the chassis S. Further, the support portion 33 is a vertical line whose center line passes through the axle 31. A rectangular plate-shaped bracket 34 is disposed on the support portion 33. The support portion 33 and the bracket 34 do not move even when the front wheel bracket 32 rotates.

  A rotating plate 36 is rotatably attached to the tip of the bracket 34 via a pin P1. The rear side of the rotating plate 36 is formed in an arc shape, and a gear is formed in the arc-shaped portion. This gear meshes with the side surface of a cylindrical post extending upward from the front wheel bracket 32 (that is, a gear is formed on the side surface of the post). This post is rotatably provided in the support portion 33, but only a portion with the gear is exposed from the opening of the support portion 33. A fixed shaft protrudes from the center of the post, and the bracket 34 is fixed to the fixed shaft. The fixed axis coincides with the center line of the support portion 33. The post is rotatable with respect to the fixed shaft. The lower end of the fixed shaft is attached to the back side of the front wheel bracket 32. Further, the post and the front wheel bracket 32 are fixed and rotated in synchronization.

  On the other hand, one end of the hydraulic cylinder 35 is rotatably attached to the acute angle portion of the rotation plate 36 via a pin P2. When the hydraulic cylinder (hydraulic device) 35 is expanded and contracted, the rotating plate 36 is rotated about the pin P1, the post meshing with the rotating plate 36 is rotated, the rear wheel bracket 32 is rotated, and the rear wheel is rotated. 30 rotates left and right. As a result, the forest work vehicle 10 can change its traveling direction to the left and right, and can turn. At this time, the support shaft 33 and the fixed shaft at the center of the post do not rotate.

  The front wheel 30 may be a wheel that is driven when the forest work vehicle 10 travels by the driving force of the crawler traveling device 20, or may be a drive wheel that is equipped with an in-wheel motor.

  A grip 40 is provided above the crawler traveling device 20. The grip portion 40 includes a pair of grip claws 41, 41, an opening / closing means 42 that fixes the proximal end side of the grip claws 41, an attachment portion 43 that attaches and holds the opening / closing means 42. The opening / closing means 42 opens and closes the gripping claws 41 by the driving force of the motor. Mounting rods 44 are provided on both the left and right sides of the mounting portion 43 so as to extend. The distal ends of the arms 45 and 45 and the distal end of the hydraulic cylinder 46 are rotatably attached to both side ends of the mounting rod 44, respectively.

  The base end sides of the pair of arms 45 are attached to the front end of the chassis S through pins 52 so as to be freely rotatable. The base end of the hydraulic cylinder 46 is rotatably attached to the main body frame S5. The main body frame S5 is fixed to the chassis S. A bucket 50 is attached to an intermediate portion of the arm 45. Specifically, the bucket 50 is rotatably attached via a mounting pin 51 between a pair of left and right arms 45. The mounting pin 51 is for connecting the side surface of the bucket 50 and the arm 45. The attachment position of the attachment pin 51 on the side surface of the bucket 50 is preferably coincident with the position of the center of gravity of the bucket 50 in a side view. In this way, even if the arm 45 rotates up and down with the pin 52 as a fulcrum, the horizontal posture of the bucket 50 remains maintained, and even if liquid or the like is stored in the bucket 50, it does not spill.

  With this configuration, when the hydraulic cylinder 46 is expanded or contracted, the arm 45 rotates in the vertical direction with the proximal end pin 52 as a fulcrum, and the gripping claws 41 and the bucket 50 move up and down.

  Reference sign CR is a cowl, and the cowl CR includes an engine, a fuel tank, a control unit, and the like. The cowl CR is provided with a receiving unit (not shown), and the forest working vehicle 10 is remotely operated via the receiving unit.

  A gear (not shown) is attached to the drive shaft 21A. This gear is provided in the chain case 61. Another gear is provided in the chain case 61. Reference numeral 63 denotes a rotating shaft of the gear. In the chain case 61, a chain is hung between two gears.

  The rotating shaft 63 passes through another chain case 62 so as to be rotatable. The rotating shaft 63 further includes another gear. This gear is disposed inside one end side of the chain case 62. A further gear is provided on the inner side of the other end side of the chain case 62, and a rotating shaft 64 of this gear is projected. A chain is hung around the two gears in the chain case 62. The rotating shaft 64 is connected to the output shaft of the engine provided in the cowl CR. Accordingly, the driving force from the engine is transmitted to the drive shaft 21A via the chain cases 62 and 61, and the drive wheels 21 are rotated.

  One end of a hydraulic cylinder (hydraulic device) 28 is rotatably attached to the upper surface on the rear end side of the chain case 61 via a pin 28P. The other end of the hydraulic cylinder 28 is rotatably attached to the frame S3 (the frame S3 is fixed to the chassis (airframe) S). The hydraulic cylinder 28 is rotatable with respect to the chain case 61 and the chassis S (frame S3).

  Reference numeral 71 denotes a storage box that stores electrical components. Reference numeral 26 denotes a mounting frame, and the mounting frame 26 rotatably mounts the driven wheel 22 and the tension roller 23. Reference numeral 27 denotes a support frame. One end of the support frame 27 is rotatably attached to the attachment frame 26 and the other end is attached to the main body frame S6. The main body frame S6 is fixed to the chassis S.

  The grip portion 40 is configured in detail as shown in FIGS. 3 (a) and 3 (b). The pair of gripping claws 41, 41 are formed symmetrically. The gripping claws 41 are made of metal, have a certain thickness, and are formed in a substantially crescent shape when viewed from the front. The lower end of the gripping claw 41 is formed thin, and the upper end is formed slightly thick. A substantially fan-shaped gear 41 </ b> A is integrally formed at the upper end of the gripping claw 41. Further, a through hole is formed near or slightly inside the gear 41A, and a pin 47 is passed through the through hole and attached to the opening / closing means 42 so as to be rotatable.

  The gears 41 </ b> A and 41 </ b> A of the pair of gripping claws 41 are engaged in the opening / closing means 42. One gear 41A meshes with another gear GE. The gear GE is attached with a rotation shaft of a motor (not shown). Therefore, when the gear GE is rotated by the motor, the gear 41A meshing with the gear GE is rotated, and the other gear 41A meshing with the gear 41A is also rotated. As a result, the gripping claws 41, 41 are opened and closed.

  A method for conveying the log (wood) W cut and cut using the grip portion 40 configured as described above will be described. First, the gear GE is rotated to open the gripping claws 41, 41, the hydraulic cylinder 46 is contracted, and the arm 45 is lowered. The tips of the gripping claws 41 and 41 are positioned near the end of the log W and on both sides in the diameter direction. Then, the gear GE is rotated to move the grip claws 41 and 41 in the closing direction, and the log W is gripped by the grip claws 41 and 41 (FIG. 4A). At this time, since the bucket 50 is rotatably attached to the arm 45 via the attachment pin 51 at the center of gravity, the bucket 50 can be kept horizontal.

  Next, the end of the log W that is gripped by extending the hydraulic cylinder 46 is lifted (FIG. 4B). At this time, the other end of the log W remains in contact with the traveling surface G. The gripping portion 40 is pulled up onto the crawler traveling device 20 by the rotation of the arm 45 while gripping one end of the log W. Therefore, it contributes to the center of gravity position of the forest working vehicle 10 being closer to the center, and the stability of the entire vehicle is improved. Further, the weight of the log W gripped by the gripping portion 40 is applied to the crawler traveling device 20, and the ground pressure of the crawler traveling device 20 can be increased. Therefore, the crawler type traveling device 20 can be prevented from slipping during traveling, and traveling performance can be improved.

  In the state of FIG. 4B, the log W is transported upward on the slope while the forest working vehicle 10 is advanced to the front wheel 30 side. At this time as well, the bucket 50 is kept horizontal. Note that it is preferable that the driving force of the crawler traveling device 20 can be exerted when the front wheel 30 side is above the inclination.

  The opening / closing operation of the gripping claws 41 and 41 and the turning operation of the arm 45 are also performed by remote operation.

  In this example, the pivot S of the arm 45 is in the chassis S. Since the chassis S is arranged at a relatively low position of the airframe, the stability is good.

  The bucket 50 can hold and carry pruned branches, work materials, and the like. Further, instead of the bucket 50, a case with a lid may be attached to the arm 45 as a storage portion. Since the inside of the case is always kept horizontal, when the forestry work vehicle 10 works on an inclined land, things that are not preferable to be tilted, for example, electrical components such as a motor and a motor driver, an oil tank, and the like are stored in the case. Also good. At this time, it is even better if the case is waterproof and dustproof.

  In the above-described example, the crawler type traveling device 20 includes the driving wheel 21 at the top, the driven wheel 22 and the tension roller 23 at the bottom, and is configured in a substantially triangular shape when viewed from the side (FIG. 1). Is not limited to this, and can take any shape such as an inverted trapezoidal shape.

  The hydraulic cylinder (hydraulic device) 35 is not limited to this, and may be an electric actuator or the like.

  Further, in the above-described example, the front wheel 30 is configured to include one tire and a wheel on the axle 31, but the present invention is not limited to this, and the tire 31 includes two tires and a wheel (a so-called double tire). ) May be provided.

  In the above-described example, the forest work vehicle 10 includes the receiving unit, and the forest work vehicle 10 is unmanned by remote operation. However, the present invention is not limited to this. Therefore, the forest work vehicle may be provided with a driver's seat so that the driver can get on and travel.

  The present invention is not limited to the above-described example, and can take any form within a scope not departing from the gist of the invention.

  The semi-crawler work vehicle of the present invention can be applied not only to a forest work vehicle but also to any work vehicle working on rough terrain such as a tractor, a combiner, a rice transplanter, and a construction machine. Moreover, when applying to these, a driver | operator may make it get on and you may make it drive unattended by remote control.

10 Forest work vehicle (semi-crawler type work vehicle)
20 Crawler type traveling device 40 Grasping part (working part)
50 bucket (storage section)

Claims (3)

A pair of left and right crawler type traveling devices provided at the rear, and
A front wheel for the front,
It is composed of a working unit provided for the rear part,
An engine-driven semi-crawler type work vehicle that works by going up and down slopes,
When going up the slope, start with the front part,
A semi-crawler type work vehicle that travels with the rear portion at the top when descending the slope,
The rear portion includes a pair of arms that can be pivoted up and down,
A semi-crawler type work vehicle provided with the working portion at the tip of the arm,
The base end of the arm is pivotally attached to the fuselage,
A semi-crawler type work vehicle characterized by comprising a storage portion between the pair of arms and at the center of each arm. A semi-crawler work vehicle in which the working unit is a gripping unit for gripping wood,
2. The semi-crawler type work vehicle according to claim 1, wherein when the arm is rotated upward, the grip portion is positioned immediately above the crawler type traveling device.   The semi-crawler type work vehicle according to claim 1, wherein the storage unit can always maintain a horizontal level.

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