US20130202397A1 - Tractor installed rotatable arm - Google Patents
Tractor installed rotatable arm Download PDFInfo
- Publication number
- US20130202397A1 US20130202397A1 US13/877,654 US201113877654A US2013202397A1 US 20130202397 A1 US20130202397 A1 US 20130202397A1 US 201113877654 A US201113877654 A US 201113877654A US 2013202397 A1 US2013202397 A1 US 2013202397A1
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- US
- United States
- Prior art keywords
- arm
- tractor
- rotating shaft
- articulated arm
- rotatable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/301—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
- E02F3/382—Connections to the frame; Supports for booms or arms
- E02F3/384—Connections to the frame; Supports for booms or arms the boom being pivotable relative to the frame about a vertical axis
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
Definitions
- the present invention relates, in general, to tractors with rotatable articulated arms and, more particularly, to a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- a tractor is an engineering vehicle designed to deliver a high tractive force and conduct different kinds of work in the agriculture or construction field.
- tractors for agriculture typically include a front loader provided on a front end of a tractor body, and an attachment mounted to the front loader so as to conduct various kinds of work, such as transportation, unloading, loading, etc.
- a workable area of the tractor is limited to an area either in front of or to the rear of the tractor. Therefore, if it is required to perform work in an area located to either side of the driver cab, the tractor must be rotated in a direction corresponding to the target area. This makes the work complicated and increases the time required to conduct the work.
- an object of the present invention is to provide a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- the present invention provides a tractor with a rotatable articulated arm, wherein a driver cab is provided with a driver seat and disposed on a body frame at a position displaced to one side from a central portion of the body frame, a rotating shaft is installed around the driver cab, and the articulated arm is installed on the rotating shaft so that the articulated arm can rotate around the rotating shaft.
- the articulated arm may include: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, with an attachment provided on an end of the second arm.
- the present invention provides a tractor with a rotatable articulated arm, wherein a rotating shaft is installed around a driver cab, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft, the articulated arm including: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, wherein the first arm and the second arm are folded, the first arm and the second arm form a Z shape along with the rotating boom.
- a bucket may be mounted to the end of the second arm.
- the rotating boom may be curved in an arc shape.
- the first arm and the second arm When the first arm and the second arm are completely folded, the first arm and the second arm may be in space defined between four wheels of the tractor.
- the first arm and the second arm may be configured such that when the first arm and the second arm are folded, the first and second hydraulic cylinders are respectively inserted into the first arm and the second arm.
- the rotating shaft may be provided with a sprocket, and a chain may be coupled to the sprocket, the chain being connected to first ends of operating rods of a pair of third hydraulic cylinders, so that the rotating shaft is rotated by extension and contraction of the third hydraulic cylinders.
- the sprocket and the chain coupled to the sprocket may form at least a double sprocket-chain structure.
- Each of the third hydraulic cylinder may include a damping bushing provided on a second end of the operating rod, and a damping chamber formed in an end of the third hydraulic cylinder, the damping chamber forming a space into which the damping bushing is inserted, wherein the space has a size at which a fine gap is formed when the damping bushing is inserted into the damping chamber.
- the rotating shaft may be disposed adjacent to a rear end of a side surface of the driver cab, so that the rotating boom can rotate around the rotating shaft within an angular range of 270°.
- the rotating shaft may be fastened to the body frame or a rear axle.
- a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible (within an angular range of about 270° in the case where the driver cab is disposed on a rear end of a side portion of the tractor body).
- an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- the rotating shaft is disposed around a rear end of a side surface of the driver cab. Therefore, the articulated arm installation structure of the present invention can reduce the whole length of the tractor.
- the articulated arm according to the present invention includes an arc-shaped curved rotating boom and two arms (a first arm and a second arm), thus making it possible for the tractor to conduct work even in a small place.
- the tractor of the present invention can be used in a variety of work environments.
- FIG. 1 is a perspective view illustrating a tractor with a rotatable articulated arm, according to the present invention
- FIG. 2 is a bottom view illustrating the tractor with the rotatable articulated arm according to the present invention
- FIG. 3 is a view showing in detail the construction of a rotating shaft according to the present invention.
- FIG. 4 is a side view of the tractor when the articulated arm is oriented forwards according to the present invention.
- FIG. 5 is a side view of the tractor when the articulated arm is oriented rearwards according to the present invention.
- FIG. 6 is a side view of the tractor to illustrate an operating radius of the articulated arm when it is oriented rearwards according to the present invention.
- FIG. 7 is a side view of the tractor to illustrate that it is possible for the tractor to carry out work even when it is in a small space after the articulated arm has been oriented rearwards.
- driver cab 21 front wheel
- a driver cab 10 having a driver seat therein is located on a left side portion of a body of the tractor, and the rotatable articulated arm 30 is disposed on a portion of the tractor body where the driver cab 10 is not located, so as to keep the balance of the tractor body.
- the driver cab 10 is disposed between front wheels 21 and rear wheels 22 of the tractor and located on the left side portion of the tractor body such that space is formed beside the driver cab 10 .
- the articulated arm 30 is maintained in a folded state in this space.
- a rotating shaft 40 is rotatably provided beside a rear end of a side surface of the driver cab 10 , in other words, at a position adjacent to one corner of the driver cab 10 .
- the articulated arm 30 is provided on the rotating shaft 40 so that the articulated arm 30 can be rotated around the rotating shaft 40 by rotation of the rotating shaft 40 .
- the location of the rotating shaft 40 is not limited to the vicinity of the rear end of the side surface of the driver cab 10 , and it can be disposed at any position, so long as it is adjacent to the driver cab 10 .
- the articulated arm 30 includes a rotating boom 31 which is coupled to the rotating shaft 40 , a first arm 32 which is hinged to the rotating boom 31 and is vertically folded or unfolded by a hydraulic cylinder 32 a, and a second arm 33 which is hinged to the first arm 32 and is vertically folded or unfolded by a hydraulic cylinder 33 a.
- An attachment is provided on an end of the second arm 33 .
- the first arm 32 and the second arm 33 respectively have spaces therein so that, when the first arm 32 and the second arm are folded, the hydraulic cylinder 32 a and the hydraulic cylinder 33 a which operate the first and second arms 32 and 33 are respectively inserted into the spaces of the first and second arms 32 and 33 . Thanks to this structure, interference with the hydraulic cylinder 32 a or 33 a can be minimized, whereby the first arm 32 and the second arm 33 can be folded to the greatest extent.
- the articulated arm 30 which includes the rotating boom 31 , the first arm 32 and the second arm 33 has the Z-shaped structure, when the articulated arm 30 is not in operation, it can be stably maintained in the folded state in the space formed beside the driver cab 10 . Therefore, when the tractor moves, it can move smoothly and without instability.
- the tractor is configured such that, when the first arm 32 and the second arm 33 are folded to the greatest extent, the first and second arms 32 and 33 are in space defined between the front and rear wheels of the tractor. Thereby, when the tractor travels, the first and second arms 32 and 33 can be maintained in a more stable state.
- the rotating boom 31 which is coupled to the rotating shaft 40 is configured to be curved in an arc shape. Hence, after the articulated arm has been rotated rearwards, that is, towards the rear wheels 22 , by rotation of the rotating shaft 40 , it becomes possible to conduct work using the articulated arm, even in a small space, without interference with the rear wheels 22 .
- the articulated arm 30 when the articulated arm 30 is being rotated by the rotation of the rotating shaft 40 , except for the driver cab 10 which is disposed on the left portion of the tractor body, nothing impedes the rotation of the articulated arm 30 . Therefore, the articulated arm 30 can easily rotate around the rotating shaft 40 within an angular range other than an angular range within which it would interfere with the driver cab 10 . In the case where the driver cab 10 is disposed in a rear end of the left side portion of the tractor, if the angular range within which the driver cab 10 impedes the rotation of the articulated arm 30 is excluded, the articulated arm 30 can rotate within an angular range of about 270° (from a range of about 260° to a range of about 290°).
- the rotating shaft 40 is installed in a frame box 60 provided in a rear end of a body frame, it may be installed on a rear axle.
- a plurality of bearings 62 and 63 are provided around the rotating shaft 40 so that it can smoothly rotate.
- a bearing box 61 which houses the bearing 62 therein is installed in the frame box 60 .
- a sprocket 41 is provided around a circumferential outer surface of the rotating shaft 40 .
- a chain 42 is wrapped around the sprocket 41 .
- Opposite ends of the chain 42 are respectively coupled to outer ends of operating rods 51 of two hydraulic cylinders 50 .
- the rotating shaft 40 can be rotated by extension and contraction of the hydraulic cylinders 50 .
- a triple sprocket-chain structure having three sprockets 41 and three chains 42 is illustrated as being used to increase rotating force of the articulated arm 30 coupled to the rotating shaft 40 .
- a double sprocket-chain structure comprising at least two sprockets and two chains is used.
- Each hydraulic cylinder 50 includes a damping structure to prevent the rotating shaft 40 from excessively rapidly rotating.
- the damping structure of the hydraulic cylinder 50 includes a damping bushing 52 which is provided on an inner end of the operating rod 51 , and a damping chamber 53 which is formed in an end of the hydraulic cylinder and forms a space into which the damping bushing 52 is inserted.
- the damping structure is configured such that, when the operating rod 51 is completely extended and the damping busing 52 is thus inserted into the damping chamber 53 , a narrow gap is formed and operating oil of the hydraulic cylinder 50 comes out towards a fluid passage 54 through the narrow gap. At this time, the expansion or contraction speed of the hydraulic cylinder 50 is reduced. In this way, the damping function can be conducted.
- the attachment is provided on the end of the articulated arm 30 so that an operating implement such as a bucket, a bale clamp, a fork lift, a hook, etc. can be easily and removably mounted to the articulated arm 30 .
- an operating implement such as a bucket, a bale clamp, a fork lift, a hook, etc.
- a small bucket 80 is provided on the end of the articulated arm 30 .
- the articulated arm 30 assumes the position of FIG. 4 .
- the operating implement for example, a bucket
- the bucket 80 is moved forwards by folding or unfolding the first and second arms 32 and 33 of the articulated arm 30 , and the orientation of the bucket 80 is adjusted by controlling the hydraulic cylinder 70 provided in the second arm 33 .
- the rotating shaft 40 is rotated such that the articulated arm 30 is oriented in the lateral direction of the tractor.
- the rotating shaft 40 is rotated such that the articulated arm 30 is oriented rearwards.
- the driver seat (not shown) provided in the driver cab 10 has a rotatable structure. Therefore, after the driver seat has been rotated rearwards, the driver in the seat can easily operate the articulated arm 30 without turning his/her head.
- the articulated arm 30 includes the rotating boom 31 coupled to the rotating shaft 40 , and the first and second arms 32 and 33 which are hinged to the rotating boom 31 and are respectively operated by the hydraulic cylinders 32 a and 33 a, the operating radius of the articulated arm 30 can be increased, as shown in FIG. 6 , showing the case where the first arm 32 and the second arm 33 are extended.
- the rotating boom 31 of the articulated arm 30 has the arc-shaped curved structure, as shown in FIG. 7 , it can conduct work even in a small space without being impeded by the rear wheels 22 .
- the articulated arm 30 can rotate within an angular range of about 270°.
- the operating radius of the operating implement mounted to the end of the articulated arm 30 can be further increased. Thereby, operation efficiency of the tractor can be markedly enhanced.
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Abstract
The present invention provides a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved. In the present invention, the driver cab which is provided with a driver seat is disposed on a body frame at a position displaced to one side from a central portion of the body frame. The rotating shaft is installed around the driver cab. The articulated arm is installed on the rotating shaft so that the articulated arm can rotate around the rotating shaft.
Description
- The present invention relates, in general, to tractors with rotatable articulated arms and, more particularly, to a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- Generally, a tractor is an engineering vehicle designed to deliver a high tractive force and conduct different kinds of work in the agriculture or construction field. At present, tractors for agriculture typically include a front loader provided on a front end of a tractor body, and an attachment mounted to the front loader so as to conduct various kinds of work, such as transportation, unloading, loading, etc.
- Recently, a technique in which a backhoe having an articulated arm is installed on a front or rear end of a tractor to perform various kinds of work was proposed.
- However, as described above, in the case where the loader is installed on the front end of the tractor or the backhoe is provided on the rear end thereof, a workable area of the tractor is limited to an area either in front of or to the rear of the tractor. Therefore, if it is required to perform work in an area located to either side of the driver cab, the tractor must be rotated in a direction corresponding to the target area. This makes the work complicated and increases the time required to conduct the work.
- Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- In order to accomplish the above object, in an aspect, the present invention provides a tractor with a rotatable articulated arm, wherein a driver cab is provided with a driver seat and disposed on a body frame at a position displaced to one side from a central portion of the body frame, a rotating shaft is installed around the driver cab, and the articulated arm is installed on the rotating shaft so that the articulated arm can rotate around the rotating shaft.
- The articulated arm may include: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, with an attachment provided on an end of the second arm.
- In another aspect, the present invention provides a tractor with a rotatable articulated arm, wherein a rotating shaft is installed around a driver cab, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft, the articulated arm including: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, wherein the first arm and the second arm are folded, the first arm and the second arm form a Z shape along with the rotating boom.
- Furthermore, a bucket may be mounted to the end of the second arm.
- The rotating boom may be curved in an arc shape.
- When the first arm and the second arm are completely folded, the first arm and the second arm may be in space defined between four wheels of the tractor.
- The first arm and the second arm may be configured such that when the first arm and the second arm are folded, the first and second hydraulic cylinders are respectively inserted into the first arm and the second arm.
- The rotating shaft may be provided with a sprocket, and a chain may be coupled to the sprocket, the chain being connected to first ends of operating rods of a pair of third hydraulic cylinders, so that the rotating shaft is rotated by extension and contraction of the third hydraulic cylinders.
- The sprocket and the chain coupled to the sprocket may form at least a double sprocket-chain structure.
- Each of the third hydraulic cylinder may include a damping bushing provided on a second end of the operating rod, and a damping chamber formed in an end of the third hydraulic cylinder, the damping chamber forming a space into which the damping bushing is inserted, wherein the space has a size at which a fine gap is formed when the damping bushing is inserted into the damping chamber.
- The rotating shaft may be disposed adjacent to a rear end of a side surface of the driver cab, so that the rotating boom can rotate around the rotating shaft within an angular range of 270°.
- The rotating shaft may be fastened to the body frame or a rear axle.
- In a tractor with a rotatable articulated arm according to the present invention, a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible (within an angular range of about 270° in the case where the driver cab is disposed on a rear end of a side portion of the tractor body). Thereby, an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved.
- Furthermore, in the present invention, the rotating shaft is disposed around a rear end of a side surface of the driver cab. Therefore, the articulated arm installation structure of the present invention can reduce the whole length of the tractor.
- Moreover, the articulated arm according to the present invention includes an arc-shaped curved rotating boom and two arms (a first arm and a second arm), thus making it possible for the tractor to conduct work even in a small place. Hence, the tractor of the present invention can be used in a variety of work environments.
-
FIG. 1 is a perspective view illustrating a tractor with a rotatable articulated arm, according to the present invention; -
FIG. 2 is a bottom view illustrating the tractor with the rotatable articulated arm according to the present invention; -
FIG. 3 is a view showing in detail the construction of a rotating shaft according to the present invention; -
FIG. 4 is a side view of the tractor when the articulated arm is oriented forwards according to the present invention; -
FIG. 5 is a side view of the tractor when the articulated arm is oriented rearwards according to the present invention; -
FIG. 6 is a side view of the tractor to illustrate an operating radius of the articulated arm when it is oriented rearwards according to the present invention; and -
FIG. 7 is a side view of the tractor to illustrate that it is possible for the tractor to carry out work even when it is in a small space after the articulated arm has been oriented rearwards. - 10: driver cab 21: front wheel
- 22: rear wheel 30: articulated arm
- 31: rotating boom 32: first arm
- 33:
second arm - 40: rotating shaft 41: sprocket
- 42: chain 50: hydraulic cylinder
- 51: operating rod 52: damping bushing
- 53: damping chamber 54: fluid passage
- 60: frame box 61: bearing box
- 62, 63: bearing 70: hydraulic cylinder
- 80: bucket
- Hereinafter, a tractor with a rotatable articulated arm according to the present invention will be described in detail with reference to the attached drawings.
- As shown in
FIGS. 1 and 2 , in the tractor with the rotatable articulated arm according to the present invention, adriver cab 10 having a driver seat therein is located on a left side portion of a body of the tractor, and the rotatable articulatedarm 30 is disposed on a portion of the tractor body where thedriver cab 10 is not located, so as to keep the balance of the tractor body. - In detail, the
driver cab 10 is disposed betweenfront wheels 21 andrear wheels 22 of the tractor and located on the left side portion of the tractor body such that space is formed beside thedriver cab 10. When the articulatedarm 30 is not in use, the articulatedarm 30 is maintained in a folded state in this space. - A rotating
shaft 40 is rotatably provided beside a rear end of a side surface of thedriver cab 10, in other words, at a position adjacent to one corner of thedriver cab 10. The articulatedarm 30 is provided on the rotatingshaft 40 so that the articulatedarm 30 can be rotated around the rotatingshaft 40 by rotation of the rotatingshaft 40. The location of the rotatingshaft 40 is not limited to the vicinity of the rear end of the side surface of thedriver cab 10, and it can be disposed at any position, so long as it is adjacent to thedriver cab 10. The articulatedarm 30 includes arotating boom 31 which is coupled to the rotatingshaft 40, afirst arm 32 which is hinged to the rotatingboom 31 and is vertically folded or unfolded by ahydraulic cylinder 32 a, and asecond arm 33 which is hinged to thefirst arm 32 and is vertically folded or unfolded by ahydraulic cylinder 33 a. An attachment is provided on an end of thesecond arm 33. - The
first arm 32 and thesecond arm 33 respectively have spaces therein so that, when thefirst arm 32 and the second arm are folded, thehydraulic cylinder 32 a and thehydraulic cylinder 33 a which operate the first andsecond arms second arms hydraulic cylinder first arm 32 and thesecond arm 33 can be folded to the greatest extent. - As shown in
FIG. 4 , when thefirst arm 32 and thesecond arm 33 are folded, they, along with therotating boom 31, form a Z shape. Because the articulatedarm 30 which includes therotating boom 31, thefirst arm 32 and thesecond arm 33 has the Z-shaped structure, when the articulatedarm 30 is not in operation, it can be stably maintained in the folded state in the space formed beside thedriver cab 10. Therefore, when the tractor moves, it can move smoothly and without instability. - Furthermore, the tractor is configured such that, when the
first arm 32 and thesecond arm 33 are folded to the greatest extent, the first andsecond arms second arms - The rotating
boom 31 which is coupled to therotating shaft 40 is configured to be curved in an arc shape. Hence, after the articulated arm has been rotated rearwards, that is, towards therear wheels 22, by rotation of therotating shaft 40, it becomes possible to conduct work using the articulated arm, even in a small space, without interference with therear wheels 22. - Furthermore, when the articulated
arm 30 is being rotated by the rotation of therotating shaft 40, except for thedriver cab 10 which is disposed on the left portion of the tractor body, nothing impedes the rotation of the articulatedarm 30. Therefore, the articulatedarm 30 can easily rotate around the rotatingshaft 40 within an angular range other than an angular range within which it would interfere with thedriver cab 10. In the case where thedriver cab 10 is disposed in a rear end of the left side portion of the tractor, if the angular range within which thedriver cab 10 impedes the rotation of the articulatedarm 30 is excluded, the articulatedarm 30 can rotate within an angular range of about 270° (from a range of about 260° to a range of about 290°). - Below, the structure for rotating the
rotating shaft 40 will be described with reference toFIGS. 2 and 3 . - As shown in
FIGS. 2 and 3 , although it is preferable that the rotatingshaft 40 is installed in aframe box 60 provided in a rear end of a body frame, it may be installed on a rear axle. A plurality ofbearings shaft 40 so that it can smoothly rotate. Abearing box 61 which houses the bearing 62 therein is installed in theframe box 60. - Furthermore, a
sprocket 41 is provided around a circumferential outer surface of therotating shaft 40. Achain 42 is wrapped around thesprocket 41. Opposite ends of thechain 42 are respectively coupled to outer ends of operatingrods 51 of twohydraulic cylinders 50. Thus, the rotatingshaft 40 can be rotated by extension and contraction of thehydraulic cylinders 50. - In
FIG. 3 , a triple sprocket-chain structure having threesprockets 41 and threechains 42 is illustrated as being used to increase rotating force of the articulatedarm 30 coupled to therotating shaft 40. Preferably, a double sprocket-chain structure comprising at least two sprockets and two chains is used. - Each
hydraulic cylinder 50 includes a damping structure to prevent therotating shaft 40 from excessively rapidly rotating. - The damping structure of the
hydraulic cylinder 50 includes a dampingbushing 52 which is provided on an inner end of the operatingrod 51, and a dampingchamber 53 which is formed in an end of the hydraulic cylinder and forms a space into which the dampingbushing 52 is inserted. The damping structure is configured such that, when the operatingrod 51 is completely extended and the dampingbusing 52 is thus inserted into the dampingchamber 53, a narrow gap is formed and operating oil of thehydraulic cylinder 50 comes out towards afluid passage 54 through the narrow gap. At this time, the expansion or contraction speed of thehydraulic cylinder 50 is reduced. In this way, the damping function can be conducted. - Hereinafter, a working process of the tractor with the rotatable articulated arm according to the present invention will be explained with reference to
FIGS. 4 through 7 . - The attachment is provided on the end of the articulated
arm 30 so that an operating implement such as a bucket, a bale clamp, a fork lift, a hook, etc. can be easily and removably mounted to the articulatedarm 30. In an embodiment ofFIGS. 4 through 7 , asmall bucket 80 is provided on the end of the articulatedarm 30. - When the tractor moves forwards or rearwards, the articulated
arm 30 assumes the position ofFIG. 4 . To conduct work in front of the tractor using the operating implement (for example, a bucket) provided on the end of the articulatedarm 30, from the state ofFIG. 4 , thebucket 80 is moved forwards by folding or unfolding the first andsecond arms arm 30, and the orientation of thebucket 80 is adjusted by controlling thehydraulic cylinder 70 provided in thesecond arm 33. - When it is required to conduct work in an area to the side of the tractor that corresponds to the right side of the
driver cab 10, the rotatingshaft 40 is rotated such that the articulatedarm 30 is oriented in the lateral direction of the tractor. - Furthermore, to conduct work backing an area to the rear of the tractor, as shown in
FIG. 5 , the rotatingshaft 40 is rotated such that the articulatedarm 30 is oriented rearwards. Here, the driver seat (not shown) provided in thedriver cab 10 has a rotatable structure. Therefore, after the driver seat has been rotated rearwards, the driver in the seat can easily operate the articulatedarm 30 without turning his/her head. - Meanwhile, because the articulated
arm 30 includes the rotatingboom 31 coupled to therotating shaft 40, and the first andsecond arms boom 31 and are respectively operated by thehydraulic cylinders arm 30 can be increased, as shown inFIG. 6 , showing the case where thefirst arm 32 and thesecond arm 33 are extended. - Furthermore, since the rotating
boom 31 of the articulatedarm 30 has the arc-shaped curved structure, as shown inFIG. 7 , it can conduct work even in a small space without being impeded by therear wheels 22. - In the present invention having the above-mentioned construction, the articulated
arm 30 can rotate within an angular range of about 270°. The operating radius of the operating implement mounted to the end of the articulatedarm 30 can be further increased. Thereby, operation efficiency of the tractor can be markedly enhanced. - Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (21)
1. A tractor with a rotatable articulated arm,
wherein a driver cab is provided with a driver seat and disposed on a body frame at a position displaced to one side from a central portion of the body frame, a rotating shaft is installed around the driver cab, and the articulated arm is installed on the rotating shaft so that the articulated arm can rotate around the rotating shaft.
2. The tractor with the rotatable articulated arm of claim 1 , wherein the articulated arm comprises: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, with an attachment provided on an end of the second arm.
3. A tractor with a rotatable articulated arm,
wherein a rotating shaft is installed around a driver cab, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft, the articulated arm comprising: a rotating boom coupled to the rotating shaft; a first arm hinged to the rotating boom and vertically bent by a first hydraulic cylinder; a second arm hinged to the first arm and vertically bent by a second hydraulic cylinder, wherein the first arm and the second arm are folded, the first arm and the second arm form a Z shape along with the rotating boom.
4. The tractor with the rotatable articulated arm of claim 3 , wherein a bucket is mounted to the end of the second arm.
5. The tractor with the rotatable articulated arm of claim 3 , wherein the rotating boom is curved in an arc shape.
6. The tractor with the rotatable articulated arm of claim 3 , wherein when the first arm and the second arm are completely folded, the first arm and the second arm are in space defined between four wheels of the tractor.
7. The tractor with the rotatable articulated arm of claim 3 , wherein the first arm and the second arm are configured such that when the first arm and the second arm are folded, the first and second hydraulic cylinders are respectively inserted into the first arm and the second arm.
8. The tractor with the rotatable articulated arm of claim 3 , wherein the rotating shaft is provided with a sprocket, and a chain is coupled to the sprocket, the chain being connected to first ends of operating rods of a pair of third hydraulic cylinders, so that the rotating shaft is rotated by extension and contraction of the third hydraulic cylinders.
9. The tractor with the rotatable articulated arm of claim 8 , wherein the sprocket and the chain coupled to the sprocket form at least a double sprocket-chain structure.
10. The tractor with the rotatable articulated arm of claim 8 , wherein each of the third hydraulic cylinder includes a damping bushing provided on a second end of the operating rod, and a damping chamber formed in an end of the third hydraulic cylinder, the damping chamber forming a space into which the damping bushing is inserted, wherein the space has a size at which a fine gap is formed when the damping bushing is inserted into the damping chamber.
11. The tractor with the rotatable articulated arm of claim 3 , wherein the rotating shaft is disposed adjacent to a rear end of a side surface of the driver cab, so that the rotating boom can rotate around the rotating shaft within an angular range of 270°.
12. The tractor with the rotatable articulated arm of claim 3 , wherein the rotating shaft is fastened to the body frame or a rear axle.
13. The tractor with the rotatable articulated arm of claim 2 , wherein a bucket is mounted to the end of the second arm.
14. The tractor with the rotatable articulated arm of claim 2 , wherein the rotating boom is curved in an arc shape.
15. The tractor with the rotatable articulated arm of claim 2 , wherein when the first arm and the second arm are completely folded, the first arm and the second arm are in space defined between four wheels of the tractor.
16. The tractor with the rotatable articulated arm of claim 2 , wherein the first arm and the second arm are configured such that when the first arm and the second arm are folded, the first and second hydraulic cylinders are respectively inserted into the first arm and the second arm.
17. The tractor with the rotatable articulated arm of claim 2 , wherein the rotating shaft is provided with a sprocket, and a chain is coupled to the sprocket, the chain being connected to first ends of operating rods of a pair of third hydraulic cylinders, so that the rotating shaft is rotated by extension and contraction of the third hydraulic cylinders.
18. The tractor with the rotatable articulated arm of claim 17 , wherein the sprocket and the chain coupled to the sprocket form at least a double sprocket-chain structure.
19. The tractor with the rotatable articulated arm of claim 17 , wherein each of the third hydraulic cylinder includes a damping bushing provided on a second end of the operating rod, and a damping chamber formed in an end of the third hydraulic cylinder, the damping chamber forming a space into which the damping bushing is inserted, wherein the space has a size at which a fine gap is formed when the damping bushing is inserted into the damping chamber.
20. The tractor with the rotatable articulated arm of claim 2 , wherein the rotating shaft is disposed adjacent to a rear end of a side surface of the driver cab, so that the rotating boom can rotate around the rotating shaft within an angular range of 270°.
21. The tractor with the rotatable articulated arm of claim 2 , wherein the rotating shaft is fastened to the body frame or a rear axle.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2010-0098566 | 2010-10-11 | ||
KR1020100098566A KR101042182B1 (en) | 2010-10-11 | 2010-10-11 | Tractor installed rotable arm |
PCT/KR2011/003779 WO2012050283A1 (en) | 2010-10-11 | 2011-05-24 | Tractor installed rotatable arm |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130202397A1 true US20130202397A1 (en) | 2013-08-08 |
Family
ID=44405698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/877,654 Abandoned US20130202397A1 (en) | 2010-10-11 | 2011-05-24 | Tractor installed rotatable arm |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130202397A1 (en) |
EP (1) | EP2628856A1 (en) |
JP (1) | JP5593450B2 (en) |
KR (1) | KR101042182B1 (en) |
CN (2) | CN104499517B (en) |
WO (1) | WO2012050283A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101371329B1 (en) * | 2012-05-30 | 2014-03-11 | 대호 (주) | Structure of Safty for Tractor |
KR101545337B1 (en) | 2015-03-09 | 2015-08-19 | 이희재 | Horizontal rotary device for boom of excavator |
KR101597976B1 (en) | 2015-09-09 | 2016-03-03 | 대한민국 | Timber gathering apparatus for tracter |
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KR200227627Y1 (en) * | 2001-01-06 | 2001-06-15 | 조동현 | Farming Truck with Excavator |
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CN101280569B (en) * | 2008-05-23 | 2011-01-19 | 同济大学 | Walking telescopic arm type remote control digging machine |
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2010
- 2010-10-11 KR KR1020100098566A patent/KR101042182B1/en active IP Right Grant
-
2011
- 2011-05-24 EP EP11832670.1A patent/EP2628856A1/en not_active Withdrawn
- 2011-05-24 CN CN201410643274.2A patent/CN104499517B/en not_active Expired - Fee Related
- 2011-05-24 JP JP2013532704A patent/JP5593450B2/en active Active
- 2011-05-24 US US13/877,654 patent/US20130202397A1/en not_active Abandoned
- 2011-05-24 CN CN201180048654.6A patent/CN103154384B/en not_active Expired - Fee Related
- 2011-05-24 WO PCT/KR2011/003779 patent/WO2012050283A1/en active Application Filing
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US3099358A (en) * | 1960-08-01 | 1963-07-30 | Int Harvester Co | Means for shifting the axis of boom means or the like |
US3216589A (en) * | 1963-04-08 | 1965-11-09 | Walker Matthew Paton | Soil excavating apparatus |
US3466770A (en) * | 1966-09-16 | 1969-09-16 | Frank W Morrison | Self-propelled earth excavating and leveling apparatus |
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Also Published As
Publication number | Publication date |
---|---|
KR101042182B1 (en) | 2011-06-16 |
EP2628856A1 (en) | 2013-08-21 |
WO2012050283A1 (en) | 2012-04-19 |
CN103154384B (en) | 2015-04-29 |
CN104499517B (en) | 2017-01-11 |
CN104499517A (en) | 2015-04-08 |
JP5593450B2 (en) | 2014-09-24 |
JP2013538962A (en) | 2013-10-17 |
CN103154384A (en) | 2013-06-12 |
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