WO2001046002A1 - Structure porteuse de pignon fou - Google Patents

Structure porteuse de pignon fou Download PDF

Info

Publication number
WO2001046002A1
WO2001046002A1 PCT/JP2000/009061 JP0009061W WO0146002A1 WO 2001046002 A1 WO2001046002 A1 WO 2001046002A1 JP 0009061 W JP0009061 W JP 0009061W WO 0146002 A1 WO0146002 A1 WO 0146002A1
Authority
WO
WIPO (PCT)
Prior art keywords
idler
support frame
crawler
frame
fork
Prior art date
Application number
PCT/JP2000/009061
Other languages
English (en)
Japanese (ja)
Inventor
Takuzo Kawamura
Kiyoshi Yonekura
Original Assignee
Yanmar Diesel Engine Co., Ltd.
Seirei Industry Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yanmar Diesel Engine Co., Ltd., Seirei Industry Co., Ltd. filed Critical Yanmar Diesel Engine Co., Ltd.
Publication of WO2001046002A1 publication Critical patent/WO2001046002A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/30—Track-tensioning means

Definitions

  • the present invention relates to a configuration of a crawler type traveling device used for a turning work vehicle or the like. More specifically, the present invention relates to a support structure for an idler of a crawler-type traveling device, wherein the idler is slidable in a front-rear direction to absorb an impact generated during traveling.
  • a crawler-type traveling device has a configuration in which an idler (driven wheel) is supported by an idler fork provided at one end (front end) of a crawler frame, and the idler fork is slidable in the front-rear direction with respect to the crawler frame.
  • the roller is biased in the crawler belt tension direction. This configuration absorbs the impact of the traveling by sliding the idler in the front-rear direction even when traveling on a rough road or a work place with severe unevenness, reduces the shock to the operator, and reduces the impact on the crawler type traveling device. This is useful because it can reduce the impact and protect peripheral components.
  • the tension of the crawler belt can be easily relaxed by artificially sliding the idler fork, making it easy to maintain. .
  • a conventional idler fork is configured to be inserted between upper and lower support frames provided on a crawler frame, and the side surfaces and upper and lower surfaces of the idler fork are respectively connected to the crawler frame and the upper and lower support frames. It was configured to be fitted.
  • Fig. 9 shows an example of a conventional idler support frame and idler oak. It is a front cross-sectional view.
  • the idler 14 is rotatably supported on the idler shaft 14 a, and the right and left ends of the idler shaft 14 a are inserted into the idler oak 56.
  • upper and lower support frames 57 H ⁇ 57 L are fixed to the left and right frames of the substantially inverted U-shaped channel frame 51, respectively. The portion is fitted between the support frames 57H and 57L so as to be sandwiched from above and below.
  • the idler fork 56 slides in the crawler frame 51 in the front-rear direction, and can move the idler 14 back and forth.
  • a drawback of the above conventional configuration is that the support frames 57H and 57L are required above and below the left and right ends of the idler fork 56, so the shape of the crawler frame 51 becomes inevitably large. This is a major design constraint, especially for small turning vehicles that require miniaturization.
  • the upper surface of the crawler frame 51 is formed to have a substantially inverted V-shape in cross section so as to have an inclination.
  • This proposal is based on the configuration shown in Fig. 9 in which the crawler frame 51 is formed in a substantially inverted U-shape in cross section and the upper surface is substantially horizontal.
  • soil and mud are easily deposited.
  • the crawler frame 51 is formed in a substantially inverted V-shape to have a slope, and the crawler frame 51 is provided with a slope. This is to prevent the sediment by preventing the mud, etc.
  • the crawler frame 51 In the configuration, the vertical width of the right and left ends of the crawler frame 51 is inevitably large, and the left and right ends of the upper surface of the crawler frame 51 are high. In such a configuration, forming the crawler frame in a substantially inverted V-shape and forming the center of the upper surface higher than the left and right ends would be a fool to interfere with other devices, or an obstacle to compactness of the vehicle. Become. As described above, the conventional configuration has a problem that it is difficult to apply the configuration in which the upper surface of the crawler frame is inclined. In addition, in this conventional configuration, in addition to the upper and lower and outer surfaces of the idler fork 56, the upper and lower support frames 57H ⁇ 57L, the crawler frame 51 must be milled. Time and cost were great, and improvements were needed.
  • the present invention has been made in view of such a drawback of the conventional configuration.
  • the purpose of the present invention is to make it possible to easily apply a configuration in which the upper surface of the crawler frame is inclined, in particular, which is compact and has few design restrictions.
  • Another object of the present invention is to provide an idler support structure that can reduce processing cost and time. Disclosure of the invention
  • the present invention provides an idler support structure for a crawler-type traveling device configured to support an idler with an idler fork slidable in the front-rear direction with respect to the idler support frame. It has a structure in which the concave portion and a convex portion provided on the idler support frame along the front-rear direction are fitted and slid. This eliminates the need for supporting members above and below the idler fork, and the idler support structure has a compact configuration. In particular, since the vertical width of the left and right ends of the idler support frame can be made small, the height of the left and right ends of the upper surface of the idler support frame can be reduced, and the upper surface of the idler support frame is formed in an inverted V-shape and inclined.
  • the height of the vertical center line of the concave portion and the convex portion is approximately equal to the height of the idler axis.
  • the concave portion may be a substantially rectangular parallelepiped concave portion provided on an outer surface of the idler fork and extending along the front and rear directions
  • the convex portion may be a substantially rectangular parallelepiped shape along the front and rear direction fixed to the idler support frame. It is composed of a support frame. This facilitates processing and further reduces costs.
  • An opening is provided near the idler axis on both sides of the idler support frame, and the convex portion can be welded from outside the idler support frame. This secures a large area for the sliding part, reduces the surface pressure of the sliding part and reduces the frictional resistance during sliding, and also facilitates the welding work and contributes to shortening the manufacturing process time.
  • FIG. 1 is a front sectional view showing an idler support structure according to the present invention
  • FIG. 2 is a side view thereof.
  • FIG. 3 is a side view showing a welding state of the support frame.
  • FIG. 4 (a) is another embodiment in which an opening is provided over the entire length of the support frame
  • FIG. 4 (b) is another embodiment in which the support frame is fixed by bolts.
  • FIG. 5 is a side view of a crawler-type work vehicle.
  • FIG. 6 is a plan view of a frame of the crawler type traveling device
  • FIG. 7 is a side view of the same
  • FIG. 8 is a front view of the same.
  • FIG. 9 is a front sectional view showing a conventional idler support structure.
  • a turning table bearing 2 is arranged in the upper center of a crawler traveling device 1, and the turning table bearing 2 supports the turning table 3 so that it can turn left and right.
  • the earth discharging plate 4 is disposed so as to be vertically rotatable.
  • An unillustrated engine, fuel tank, and the like are mounted on the rear side of the upper part of the swivel 3, and a bonnet 5 is covered so as to cover the engine and the like.
  • the bonnet 5 has a substantially half-moon shape in plan view, and is arranged on the rear portion of the swivel 3.
  • a driver's seat 8 is provided above the hood 5, and a canopy 9 is mounted above the driver's seat 8. Steps are formed at the front of the driver's seat 8, and a walk-through system that allows entry and exit from either the left or right.
  • An operation pedal and an operation lever are arranged on the side of the driver's seat 8 and on the front of the step.
  • a work machine including a boom, an arm, a bucket, and the like is mounted on a boom bracket 7 which is attached to the front end of the swivel table 3 so as to be rotatable left and right. It is possible to dig trenches.
  • a balance weight 6 is provided below the rear end of the swivel 3 in order to balance the weight of the work implement mounted on the front of the swivel 3.
  • the crawler-type traveling device 1 includes left and right crawler frames 11 L 1 11 R (hereinafter referred to as crawler frames 11 as appropriate) and the right and left crawler frames 11 1.
  • L ⁇ 11 1 It is constituted by a central frame 10 connecting the R, and the swivel 3 is mounted on the upper center of the central frame 10.
  • Left and right crawler frames 1 1L ⁇ 1 1R support drive sprockets 1 3 ⁇ 1 3 at the rear end.
  • the upper surface of the crawler frame 1 1L ⁇ 1 1R has a substantially inverted V-shape in cross section to form an inclined surface, and soil and mud scattered during the work are crawler frames 1 1L 1 Even when riding on the 1R, it rolls down or slides down on the inclined surface under its own weight so that sediment and mud do not accumulate on the crawler frame 11L * 11R.
  • the crawler frame 11 L ⁇ 11 R has a structure that prevents sediment and mud from being deposited on the upper surface, so that frequent maintenance work such as cleaning is not required.
  • the center of the upper surface of the crawler frame 11L ⁇ 11R is slightly higher because the upper surface of the crawler frame 11L ⁇ 11R is formed in a substantially inverted V-shape.
  • the crawler frame 51 of the conventional structure shown in FIG. The crawler frame as a whole has the same or smaller vertical width as that of the crawler frame, so that the compactness of the crawler traveling device is not lost.
  • a receiving plate 19 is fixed to the rear end of the pipe 21, and a spring 20 is elastically mounted between the receiving plate 19 and the slide plate 18.
  • the spring 20 is disposed so as to fit over the pipe 21 and urges the idler forks 16... 16 in the forward direction (the direction in which the crawler is tensioned).
  • Each of the idler forks 16 has a long groove-like concave portion 16a in the horizontal direction formed on a side surface facing right and left outside.
  • the support frames 1 that form the protrusions are provided on the inner surfaces of the left and right side walls of the idler support frame 12 arranged to cover the side surfaces of the idler 14, the support frames 1 that form the protrusions are provided. 7 are respectively fixed.
  • the support frame 17 is a substantially rectangular parallelepiped frame extending in the front-rear direction, and is fitted into the long groove-shaped recess 16a so as to be slidable.
  • the vertical center line 17C of the support frame 17 is substantially the same height as the axial center position of the idler shaft 14a, and its rear end extends to near the rear end of the idler support frame 12.
  • an opening 16 b which is a long hole is formed in the middle of the idler fork 16 before and after. Is provided.
  • the support frame 17 is attached to the inner surfaces of the left and right side walls of the idler support frame 12, and then the support frame 17 is inserted from the inside of the idler support frame 12 through the opening 16 b.
  • the ends of the upper and lower surfaces 17 can be welded to the inner surfaces of the left and right side walls of the idler support frame 12.
  • the welded portion thus formed is indicated by reference numeral 12c.
  • the idler fork 16 Since the recess 16a is not formed at the position of the opening 16b of the idler fork 16 located at the welded portion 12c, the idler fork 16 is not formed at the position of the opening 16b.
  • an idler support frame 12 is provided with an oval opening 12a in the vicinity of the center axis of the idler 14 at the front side surface of the idler support frame 12.
  • the idler support frame 12 After mounting the support frame 17 from the inside so as to close the opening 12a, the idler support frame 12 is supported from the outside through the opening 12a to support the idler of the opening 12a.
  • the support frame 17 is fixed to the ends on the inner side of the left and right side walls by welding the surface of the support frame 17 facing left and outside.
  • openings are formed in the idle fork 16 in order to avoid welds in those portions (such as the above-described openings 16 b).
  • a concave portion 16a can be formed in this portion, and can be fitted and slid to the support frame 17.
  • the opening 12a of the idler support frame 12 is provided over the entire length of the support frame 17 in the longitudinal direction, and the support frame 17 is mounted.
  • the opening 16b in the idle fork 16 is not necessary to provide the opening 16b in the idle fork 16 as in the above-described embodiment in order to avoid a weld, and the recess 16a is formed in the idle fork 16 over the entire region in the longitudinal direction.
  • the idler fork 16 can be secured as a sliding surface on which the idler fork 16 slides by being fitted to the support frame 17. This means that the area of the sliding surface increases, and that the reduction of the surface pressure suppresses the sliding resistance.
  • welding work and the like can be performed from the outer side of the idler support frame 12, assembly work is also easy.
  • bolt holes 12b are provided on both side surfaces of the idler support frame 12 so that the port hole can be formed.
  • Each of the idler forks 16 ⁇ 16 has a boss formed outwardly in the vicinity of the axial center position of the idler shaft 14 a, and has the same position and shape as the support frame 17 ⁇ 17.
  • the long groove-shaped concave portions 16a and 16a are formed on the outer surface of the idler fork horizontally from the position of the pos portion. That is, the vertical center line 17 C of the concave portion 16 a ⁇ 16 a and the support frame 17 is set to be substantially the same height as the axis of the idler 14. Then, the recess 16 a ⁇ 16 a and the support frame 17 are fitted By combining them, the idler 14 is slidably supported in the front-rear direction.
  • the idler support structure according to the present invention is useful for a crawler-type traveling vehicle that often travels on a road having many irregularities and obstacles, in particular, an idler support structure for a turning work vehicle. It is suitable for a configuration for absorbing the vehicle to improve the ride comfort and protect the vehicle equipment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne une structure conçue pour porter un pignon fou (14) au moyen d'une fourche de renvoi (16) coulissante longitudinalement dans un dispositif mobile (1) sur chenilles. Un évidement (16a), formé dans la fourche de renvoi (16) dans le sens de sa longueur, et une armature porteuse (17), ou une saillie, formé sur une armature porteuse de pignon fou (12) dans le sens de sa longueur, s'emboîtent, ce qui permet de réduire la largeur verticale d'un châssis latéral, d'assurer une liberté de conception avec une meilleure compacité, et de donner aisément à la surface supérieure dudit châssis une forme généralement en V inversé qui empêche le sable et la terre de se déposer.
PCT/JP2000/009061 1999-12-22 2000-12-20 Structure porteuse de pignon fou WO2001046002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/363729 1999-12-22
JP36372999A JP4214184B2 (ja) 1999-12-22 1999-12-22 アイドラ支持構造

Publications (1)

Publication Number Publication Date
WO2001046002A1 true WO2001046002A1 (fr) 2001-06-28

Family

ID=18480049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/009061 WO2001046002A1 (fr) 1999-12-22 2000-12-20 Structure porteuse de pignon fou

Country Status (2)

Country Link
JP (1) JP4214184B2 (fr)
WO (1) WO2001046002A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102837748A (zh) * 2011-06-21 2012-12-26 江苏柳工机械有限公司 履带式滑移转向装载机底盘

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8870304B2 (en) 2011-12-20 2014-10-28 Caterpillar Inc. Idler key for track roller assembly
US8870305B2 (en) 2011-12-20 2014-10-28 Caterpillar Inc. Track roller assembly having adjustable idler wheel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49107034U (fr) * 1973-01-09 1974-09-12
JPS6154982U (fr) * 1984-09-14 1986-04-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49107034U (fr) * 1973-01-09 1974-09-12
JPS6154982U (fr) * 1984-09-14 1986-04-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102837748A (zh) * 2011-06-21 2012-12-26 江苏柳工机械有限公司 履带式滑移转向装载机底盘

Also Published As

Publication number Publication date
JP4214184B2 (ja) 2009-01-28
JP2001180546A (ja) 2001-07-03

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