WO2017068687A1 - 履帯リンクおよびリンク取付体 - Google Patents
履帯リンクおよびリンク取付体 Download PDFInfo
- Publication number
- WO2017068687A1 WO2017068687A1 PCT/JP2015/079852 JP2015079852W WO2017068687A1 WO 2017068687 A1 WO2017068687 A1 WO 2017068687A1 JP 2015079852 W JP2015079852 W JP 2015079852W WO 2017068687 A1 WO2017068687 A1 WO 2017068687A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- link
- crawler belt
- hole
- attachment
- protrusion
- Prior art date
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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
- B62D55/18—Tracks
- B62D55/20—Tracks of articulated type, e.g. chains
- B62D55/202—Wheel engaging parts; Wheel guides on links
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- 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
- B62D55/18—Tracks
- B62D55/20—Tracks of articulated type, e.g. chains
- B62D55/205—Connections between track links
- B62D55/21—Links connected by transverse pivot pins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/32—Assembly, disassembly, repair or servicing of endless-track systems
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/02—Travelling-gear, e.g. associated with slewing gears
Definitions
- the present invention relates to a crawler belt link and a link attachment body.
- a tracked work vehicle such as a hydraulic excavator has a traveling body, a turning body, and a work machine installed on the turning body.
- the traveling body includes drive wheels (sprockets), idle wheels (idlers), wheels, and crawler belt devices.
- the crawler belt device is wound around the idler wheel and the drive wheel.
- the crawler belt device can be driven to rotate by engaging the teeth of the drive wheel with the crawler belt device and rotating the drive wheel.
- a crawler belt device is generally configured by connecting a plurality of crawler belt links endlessly (annularly) with pins and bushes, and attaching a crawler plate (shoe) to the plurality of crawler belt links.
- the crawler belt link has a wheel receiving path and upright flanges located on both sides of the wheel receiving path.
- the wheel receiving path is a portion that becomes a tread surface on which the wheel passes.
- An upright flange is a part which meshes with the drive tumbler used as a drive wheel.
- the endless belt is configured by connecting the plurality of crawler belt links in an endless manner.
- the endless belt is driven to rotate.
- the places where the degree of wear is large are the wheel receiving path (tread surface) and the upright flange meshing with the drive tumbler.
- This maintenance work is performed by performing build-up welding on the worn portion (wheel receiving path or upright flange) or exchanging the crawler belt links after releasing the connection between the crawler belt links.
- the present invention has been made in view of the above problems.
- the objective of this invention is providing the crawler belt link and link attachment body which can maintain a wear part, without releasing the coupling
- the crawler belt link of the present invention includes a link main body, a link attachment body, and an attachment pin.
- the link body is configured by integrating a crawler plate portion and a link portion.
- the link attachment body includes a plate portion that is a separate part from the link main body and has a tread surface, and a protrusion that is integrated with the plate portion and protrudes from the tread surface.
- the attachment member attaches the link attachment body to the link body on the side opposite to the protrusion with respect to the plate portion.
- the link attachment body is attached to the link body by the attachment member.
- the link attachment body can be removed from the link body.
- the wear portion can be maintained by removing the link attachment body from the link body without releasing the coupling between the crawler belt links.
- the mounting member is a mounting pin. Therefore, a mounting member can be made into a simple structure.
- the protrusion includes a first protrusion and a second protrusion.
- Each of the first protrusion and the second protrusion is integrated with the plate portion and protrudes from the tread surface.
- the 1st projection part and the 2nd projection part are arranged on both sides of a plate part on both sides of a plate part.
- the link attachment body In the crawler belt link, the link attachment body is in contact with the link body. As a result, the external force acting on the link attachment body when the crawler belt link is driven acts on the link body and does not act on the attachment pin. Thus, since the load acting on the mounting pin can be reduced, the durability of the crawler belt link is improved.
- the link attachment body is formed with a first pin insertion hole, and the link body is formed with a second pin insertion hole.
- the mounting pin is inserted into both the first pin insertion hole and the second pin insertion hole.
- the attachment pin is inserted into both the first pin insertion hole of the link attachment body and the second pin insertion hole of the link body, so that the link attachment body is detachably attached to the link body. Is possible.
- the second pin insertion hole has a first hole located on one end side and a second hole located on the other end side.
- the first hole has a diameter equal to or larger than the diameter of the mounting pin, and the second hole has a diameter smaller than the diameter of the mounting pin.
- the mounting pin can be inserted into the second pin insertion hole from the first hole side. Further, when the mounting pin is inserted into the second pin insertion hole, the insertion of the mounting pin can be stopped at the boundary between the first hole and the second hole. For this reason, positioning of the mounting pin at the time of insertion of the mounting pin becomes easy.
- the end face of the mounting pin is exposed from the link body through the second hole.
- the crawler belt link is further provided with a restricting member that is attached to the link body and restricts the movement of the attachment pin in the axial direction.
- This restriction member restricts movement of the mounting pin inserted into the first and second pin insertion holes in the axial direction. For this reason, the restricting member prevents the mounting pin from coming out of the first and second pin insertion holes.
- the link attachment body of the present invention includes a plate portion, a protrusion, and an attachment portion.
- the plate portion has a tread surface.
- the protrusion is integrated with the plate portion and protrudes from the tread surface.
- the attachment portion is attached to the plate portion, extends to the opposite side to the projection with respect to the plate portion, and has an attachment member hole.
- the link attachment body of the present invention has an attachment portion having an attachment member hole. For this reason, it becomes possible to detachably attach the link attachment body to the link body by inserting the attachment member into the attachment member hole of the attachment portion. As a result, even when the protrusions and the treads of the link attachment body are worn, the wear portion can be maintained by removing the link attachment body from the link body without releasing the coupling between the crawler belt links.
- the attachment member hole is a pin insertion hole.
- the protrusion includes a first protrusion and a second protrusion.
- Each of the first protrusion and the second protrusion is integrated with the plate portion and protrudes from the tread surface.
- the 1st projection part and the 2nd projection part are arranged on both sides of a plate part on both sides of a plate part.
- FIG. 1 is a schematic side view showing a configuration of a hydraulic excavator as an example of a tracked work vehicle using a crawler belt device according to an embodiment of the present invention.
- FIG. 2 is a perspective view schematically showing a part of the configuration of a traveling body in the tracked work vehicle of FIG. 1.
- FIG. 3 is an exploded perspective view schematically showing a part of the configuration of a crawler belt device included in the traveling body of FIG. 2. It is the top view (A), side view (B), bottom view (C), and front view (D) which show the structure of the link attachment body contained in the crawler belt apparatus of FIG.
- FIG. 1 is a schematic side view showing a configuration of a hydraulic excavator as an example of a tracked work vehicle using a crawler belt device according to an embodiment of the present invention.
- FIG. 2 is a perspective view schematically showing a part of the configuration of a traveling body in the tracked work vehicle of FIG. 1.
- FIG. 3 is an exploded perspective view schematically showing
- FIG. 4 is a front view (A), a plan view (B), and a cross-sectional view (C) taken along the line VC-VC of the plan view (B) showing the configuration of the link body included in the crawler belt device of FIG. 3 is a cross-sectional view taken along line VIA-VIA in FIG. 5A and a cross section taken along line VIB-VIB in FIG. It is a figure (B).
- FIG. 6 is a cross-sectional perspective view showing a configuration in which two crawler belt links are connected along the line VIA-VIA of FIG.
- FIG. 7 is a cross-sectional perspective view showing a configuration in which two crawler belt links are connected along the line VIII-VIII in FIG. 6 (B).
- FIG. 1 A hydraulic excavator will be described below with reference to FIG. 1 as an example of a work vehicle to which the idea of the present invention can be applied.
- the present invention can be applied to a tracked work vehicle such as a bulldozer in addition to a hydraulic excavator.
- the front-rear direction refers to the front-rear direction of the operator seated on the driver's seat.
- the left-right direction (width direction) refers to the left-right direction of the operator seated on the driver's seat.
- the vertical direction means the vertical direction of the operator seated on the driver's seat.
- the direction facing the operator seated in the driver's seat is the front direction
- the direction facing the front direction is the rear direction.
- the right side and the left side are the right direction and the left direction, respectively.
- the feet of the operator seated in the driver's seat are the lower side and the upper head is the upper side.
- FIG. 1 is a schematic side view showing a configuration of a hydraulic excavator as an example of a tracked work vehicle using a crawler belt device according to an embodiment of the present invention.
- a hydraulic excavator 50 according to the present embodiment is a large hydraulic excavator, and mainly includes a traveling body 20, a revolving body 30, and a work implement 40.
- the traveling body 20 and the turning body 30 constitute a work vehicle main body.
- the turning body 30 is installed so as to be turnable with respect to the traveling body 20.
- the swivel body 30 mainly includes a cab 31, an engine room 32, a counterweight 33, and an access system 34.
- the driver's cab 31 is arranged, for example, on the front left side (vehicle front side) of the revolving structure 30.
- Each of the engine room 32 and the counterweight 33 is disposed on the rear side (rear side of the vehicle) of the revolving structure 30.
- the engine room 32 houses engine units (engine, exhaust treatment structure, etc.).
- the upper part of the engine room 32 is covered with an engine hood.
- the counterweight 33 is disposed behind the engine room 32.
- the access system 34 is a side part of the revolving structure 30 and is arranged on the left side, for example.
- the access system 34 is provided for an operator to get into the cab 31 from the ground and to get down from the cab 31 to the ground.
- the work machine 40 is pivotally supported on the front side of the revolving unit 30.
- the work machine 40 includes, for example, a boom 41, an arm 42, a bucket 43, a hydraulic cylinder, and the like.
- a base end portion of the boom 41 is rotatably connected to the revolving body 30.
- the base end portion of the arm 42 is rotatably connected to the tip end portion of the boom 41.
- the bucket 43 is rotatably connected to the tip of the arm 42.
- the work machine 40 can be driven by each of the boom 41, the arm 42, and the bucket 43 being driven by a hydraulic cylinder.
- the traveling body 20 is configured such that the work vehicle (hydraulic excavator) 1 travels when the pair of left and right crawler belt devices 10 are rotationally driven.
- the traveling body 20 mainly includes a crawler belt device 10, a drive wheel (sprocket) 21, an idler wheel (idler) 22, a track frame 23, a lower roller 24, an upper roller 25, and a turning device 26.
- a crawler belt device 10 mainly includes a crawler belt device 10, a drive wheel (sprocket) 21, an idler wheel (idler) 22, a track frame 23, a lower roller 24, an upper roller 25, and a turning device 26.
- the driving wheel 21 is provided at the rear end of the track frame 23 so as to be rotationally driven.
- the idler wheel 22 is rotatably provided at the front end portion of the track frame 23.
- the plurality of downwheels 24 are provided below the track frame 23.
- the plurality of upper rotating wheels 25 are provided on the upper side of the track frame 23.
- the crawler belt device 10 is wound around a drive wheel 21 and an idle wheel 22.
- the crawler belt device 10 is supported by a lower roller 24 and an upper roller 25 disposed between the drive wheel 21 and the idler wheel 22.
- the crawler belt device 10 is engaged with the drive wheels 21.
- the crawler belt device 10 is rotationally driven when the driving wheel 21 is rotationally driven.
- the traveling body 20 self-propels.
- each of the idler wheel 22, the plurality of lower rollers 24 and the plurality of upper rollers 25 is in contact with the crawler belt device 10 and can be driven and rotated.
- FIG. 2 is a perspective view schematically showing a part of the configuration of the traveling body in the tracked work vehicle of FIG.
- the crawler belt device 10 is configured by connecting a plurality of crawler belt links 1 in an endless (annular) manner with connecting pins 7.
- Each of the plurality of crawler belt links 1 has a tread surface 2a and two protrusions (protrusions) 2b.
- the two protrusions (protrusions) 2b are arranged on both sides of the plate part with the plate part having the tread surface 2a interposed therebetween.
- the tread surface 2a and the two protrusions 2b are disposed on the inner surface (non-grounding surface) of the crawler belt device 10 connected endlessly.
- the tread surface 2a is a surface on which the drive wheel 21, the wheel (for example, the lower wheel 24), and the like roll.
- the rolling surface 21da of the driving wheel 21, the rolling surface 24a of the rolling wheel (for example, the lower rolling wheel 24) and the like come into contact with the tread surface 2a.
- Each of the two protrusions 2b is a portion that meshes with a recess 21ea provided on the outer periphery of the drive wheel 21. Due to the engagement between the projection 2b and the recess 21ea, the rotational driving force of the driving wheel 21 is transmitted to the crawler belt device 10, and the crawler belt device 10 is rotationally driven.
- FIG. 3 is an exploded perspective view schematically showing a part of the configuration of the crawler belt device included in the traveling body of FIG. 2.
- the crawler belt device 10 mainly includes a plurality of crawler belt links 1 and connecting pins 7 that connect the plurality of crawler belt links 1.
- Each of the plurality of crawler belt links 1 has a worn portion of a tread surface 2a and a protruding portion 2b.
- the wear parts (the tread surface 2 a and the projection part 2 b) are configured to be detachable from the crawler belt link 1. The configuration will be specifically described below.
- Each of the plurality of crawler belt links 1 mainly has a link attachment body 2, a link main body 3, and an attachment pin (attachment member) 4.
- the link attachment body 2 has a wear part composed of a tread surface 2a and a protrusion 2b.
- the link attachment body 2 further has an attachment portion 2c.
- a through hole 2ca (first pin insertion hole) is formed in the attachment portion 2c.
- the link body 3 is a separate part from the link mounting body 2.
- the link main body 3 is integrally formed with a crawler plate portion 3TS and a link portion, and is composed of one component.
- the crawler plate portion 3TS is located on the outer surface (ground surface) of the endless crawler belt device 10.
- the crawler plate portion 3TS has a grouser 3TSg that protrudes outside the crawler belt device 10.
- the link body 3 has a recess 3g on the inner surface (non-grounding surface) of the crawler belt device 10.
- the non-grounding surface is the side opposite to the side on which the crawler plate portion 3TS is disposed, and as shown in FIG. 2, the drive wheel 21, the idler wheel 22, the lower roller 24, and the upper roller 25 It is the surface on the abutting side.
- the recess 3g is for fitting the link attachment body 2 therein.
- a through hole 3pa (second pin insertion hole) and a through hole 3pb are formed so as to communicate with the recess 3g.
- the through hole 3pa and the through hole 3pb are separated from each other across the recess 3g.
- the through hole 3pa and the through hole 3pb are formed to be concentric.
- the link attachment body 2 is fitted into the recess 3g of the link body 3 from the non-contact surface side.
- the link attachment body 2 is fitted into the recess 3g of the link body 3 from the attachment portion 2c side.
- the through hole 2ca of the attachment portion 2c is located between the through hole 3pa and the through hole 3pb of the link body 3.
- the through hole 3pa, the through hole 3pb, and the through hole 2ca are arranged concentrically with each other and communicate with each other.
- the mounting pin 4 is inserted in the axial direction of the mounting pin 4 in these through holes 3pa, 3pb, 2ca. With this attachment pin 4, the link attachment body 2 is attached and fixed to the link body 3 on the opposite side of the projection 2b with respect to the plate portion.
- a limiting member (for example, a bolt 5 and a nut 6) is used to prevent the mounting pin 4 from coming off.
- the mounting pin 4 is inserted by inserting the mounting pin 4 into the through holes 3pa, 3pb, and 2ca in the axial direction.
- the limiting members 5 and 6 are positioned in the axial direction of the mounting pin 4 in a state of being mounted on the link body 3.
- the movement of the mounting pin 4 in the axial direction is restricted by the restriction members 5 and 6.
- the mounting pin 4 is prevented from being pulled out from the through holes 3pa, 3pb, 2ca in the axial direction of the mounting pin 4 while being inserted into the through holes 3pa, 3pb, 2ca.
- the link mounting body 2 having the worn portions can be attached to and detached from the link main body 3. Moreover, attachment / detachment of the link attachment body 2 with respect to the link main body 3 is possible without uncoupling the crawler belt links 1 constituting the crawler belt device 10.
- crawler belt links 1 are configured to be connected to each other by a connecting pin 7.
- the configuration will be specifically described below.
- a plurality of crawler belt links 1 are arranged in one row.
- Each of the plurality of crawler belt links 1 is provided with, for example, two sets of a pair of connection portions 3b and 3c on one end side in the short side direction (Y direction in the drawing) of the crawler belt links 1.
- the connecting portion 3b is provided with a through hole 3ba.
- the connecting portion 3c is provided with a through hole 3ca.
- the through hole 3ba and the through hole 3ca of the pair of connecting portions 3b and 3c extend in the longitudinal direction (X direction in the drawing) of the crawler belt link 1 and are arranged so as to be concentric with each other.
- Each of the plurality of crawler belt links 1 is provided with, for example, two connecting portions 3d on the other end side in the short direction Y of the crawler belt links 1.
- the connecting portion 3d is provided with a through hole 3da.
- the through hole 3da extends in the longitudinal direction X of the crawler belt link 1.
- the connecting part 3d of the other crawler belt link 1 is arranged between the pair of connecting parts 3b, 3c of the one crawler belt link 1.
- the through hole 3da of the connecting portion 3d is positioned between the through holes 3ba and 3ca of the pair of connecting portions 3b and 3c in a state where the connecting portion 3d is disposed between the pair of connecting portions 3b and 3c. ing.
- the through holes 3ba and 3ca of the connecting portions 3b and 3c and the through holes 3da of the connecting portion 3d are arranged concentrically and communicate with each other.
- the connecting pin 7 is inserted through the through holes 3ba, 3ca, 3da in the axial direction of the connecting pin 7. Thereby, one crawler belt link 1 and the other crawler belt link 1 are connected with each other by the connecting pin 7. In this connected state, one crawler belt link 1 and the other crawler belt link 1 can rotate relative to each other about the connection pin 7.
- a restricting member for example, a bolt 8 and a nut 9
- the limiting members 8 and 9 are located in the axial direction of the connecting pin 7 in a state where they are attached to the link body 3.
- the restricting members 8 and 9 restrict the movement of the connecting pin 7 in the axial direction.
- the connecting pin 7 is prevented from coming off from the through holes 3ba, 3ca, 3da in the axial direction of the connecting pin 7 while being inserted into the through holes 3ba, 3ca, 3da.
- crawler belt links 1 in an endless manner by sequentially connecting the plurality of crawler belt links 1 as described above. Further, the crawler belt links 1 can be disconnected by removing the restricting members 8 and 9 from the link body 3 and removing the connecting pin 7 from the connecting portions 3b to 3d.
- FIG. 4 is a plan view (A), a side view (B), a bottom view (C), and a front view (D) showing the configuration of the link attachment body included in the crawler belt device of FIG.
- the link attachment body 2 has a plate portion having a tread surface 2a, a pair of protrusions 2b, and an attachment portion 2c.
- the plate part, the pair of protrusions 2b, and the attachment part 2c are integrated with each other to form one component.
- the link attachment body 2 is a forged product formed by forging, for example.
- the plate portion having the tread surface 2a has one end portion 2a1, a central portion 2a2, and the other end portion 2a3.
- One end 2a1 is located on the one end side of center 2a2.
- the other end 2a3 is located on the other end side of the central portion 2a2.
- the upper surface of the one end portion 2a1, the upper surface of the center portion 2a2, and the upper surface of the other end portion 2a3 form a continuous flat surface. This continuous flat surface constitutes the tread 2a.
- Each of the pair of projecting portions 2b is attached to the side portion of the central portion 2a2.
- the pair of projecting portions 2b sandwich the central portion 2a2 and project laterally from the central portion 2a2 (tread surface 2a).
- each of the pair of protrusions 2b protrudes from the tread surface 2a to one side (upper side in the figure: non-contact surface side).
- the attachment part 2c is attached to the lower surface of the center part 2a2.
- the attachment portion 2c extends from the lower surface of the plate portion to the other side (lower side in the drawing: contact surface side: the side opposite to the protrusion 2b with respect to the plate portion).
- the through hole 2ca is provided in the mounting portion 2c as described above.
- the through hole 2ca penetrates the attachment portion 2c in the direction in which the pair of protrusions 2b are arranged.
- the through hole 2ca is a cylindrical hole and has a single diameter in the entire axial direction.
- the upper surface 2ba of the protrusion 2b has a straight line portion RA and curved portions RB located on both sides of the straight line portion RA in a side view.
- the straight line portion RA is parallel or substantially parallel to the tread surface 2a.
- the curved portion RB has an arc shape, for example. Since the upper surface 2ba of the protruding portion 2b has such a shape, it is possible to engage with the driving wheel 21 with a high system.
- the lower surface of the protrusion 2b has an upwardly convex curved shape.
- the protrusion 2b has an upwardly convex arch shape in a side view. Since the protrusion 2b has an upwardly convex arch shape, it is possible to disperse the external force that acts on the protrusion 2b when it is engaged with the drive wheel 21 without being concentrated.
- the lower end 2bc of the protrusion 2b has a protruding shape that protrudes downward.
- the lower end 2bc of the protrusion 2b can be firmly brought into contact with the link body 3.
- the external force (traction load) that acts on the protrusion 2 b from the drive wheel 21 can act on the link body 3 and does not act on the mounting pin 4.
- both the protruding portion 2b and the attaching portion 2c are connected to the central portion 2a2.
- the width W of the protrusion 2b decreases from the tread surface 2a side toward the non-contact surface side.
- the width W is large at the root portion of the protrusion 2b, the strength of the protrusion 2b can be ensured.
- the width W is small at the tip of the protrusion 2b, the engagement with the drive wheel 21 can be improved, and the material can be saved.
- FIG. 5 is a front view (A), a plan view (B), and a sectional view (C) taken along the line VC-VC of the plan view (B) showing the configuration of the link main body included in the crawler belt device of FIG. .
- 6 is a cross-sectional view (A) along the line VIA-VIA in FIG. 5 (A) and the line VIB-VIB in FIG. It is sectional drawing (B) shown along.
- the link main body 3 mainly has a recess forming portion in which a recess 3g is formed, links 3LA and 3LB, and a shoe plate portion 3TS. ing.
- the recess forming portions, the link portions 3LA and 3LB, and the crawler plate portion 3TS are integrated with each other and constitute one component.
- the link main body 3 is a cast product formed by casting, for example.
- the crawler plate part 3TS is located on the grounding surface side of the link body 3.
- the crawler plate portion 3TS has a grouser 3TSg that protrudes to the outside (ground surface side) of the crawler belt device 10.
- a plurality of (for example, two) glossers 3TSg are provided in one link body 3.
- Each of the plurality of growers 3TSg extends along the longitudinal direction X of the link body 3.
- the link portion 3LA is disposed on one end side of the recess forming portion, and the link portion 3LB is disposed on the other end side of the recess forming portion.
- the recessed part formation part is arrange
- the concave portion 3g formed in the concave portion forming portion is constituted by concave portions 3g1 to 3g5.
- the recessed portion 3g2 is formed deep in the center of the non-contact surface of the link body 3.
- the recessed portion 3g2 is a portion that accommodates the attachment portion 2c and the central portion 2a2 of the link attachment body 2 shown in FIGS. 4 (A) to 4 (D).
- the concave portion 3g1 is arranged on one end side of the concave portion 3g2 in the short direction Y of the link body 3.
- the recessed portion 3g1 is formed shallower than the recessed portion 3g2.
- the recessed portion 3g1 is a portion that accommodates one end 2a1 of the link attachment body 2 shown in FIGS. 4 (A) to 4 (D).
- the concave portion 3g3 is disposed on the other end side of the concave portion 3g2 in the short direction Y of the link body 3.
- the recessed portion 3g3 is formed shallower than the recessed portion 3g2.
- the recessed portion 3g3 is a portion that accommodates the other end 2a3 of the link mounting body 2 shown in FIGS. 4 (A) to 4 (D).
- the concave portion 3g4 is arranged on one end side of the concave portion 3g2 in the longitudinal direction X of the link body 3.
- the recessed portion 3g4 is formed shallower than the recessed portion 3g2.
- the recessed portion 3g4 is a portion that accommodates one lower portion of the pair of protrusions 2b of the link attachment body 2 shown in FIGS. 4 (A) to 4 (D).
- the concave portion 3g5 is disposed on the other end side of the concave portion 3g2 in the longitudinal direction X of the link body 3.
- the recessed portion 3g5 is formed shallower than the recessed portion 3g2.
- the recessed portion 3g5 is a portion that accommodates the other lower portion of the pair of protruding portions 2b of the link mounting body 2 shown in FIGS. 4 (A) to 4 (D).
- the link portion 3LA includes a base portion 3a, connecting portions 3b to 3d, and rim portions 3ra and 3rb.
- the base portion 3a extends from the crawler plate portion 3TS to the non-contact surface side.
- the base 3a is provided with a recess 3a2 that is recessed from the non-contact surface to the contact surface side.
- the base 3a is provided with a through hole 3pa that connects the recess 3a2 and the recess 3g.
- the through hole 3pa has a large diameter portion 3pa1 (first hole portion) and a small diameter portion 3pa2 (second hole portion).
- Each of large diameter part 3pa1 and small diameter part 3pa2 is a cylindrical hole, for example.
- the large-diameter portion 3pa1 and the small-diameter portion 3pa2 communicate with each other and are arranged so as to be concentric with each other.
- the large diameter portion 3pa1 is located closer to the concave portion 3g than the small diameter portion 3pa2.
- a through hole 3a1 is provided in the base 3a.
- the through hole 3a1 is located on the opposite side of the through hole 3pa with respect to the recess 3a2 in the longitudinal direction X of the link body 3.
- the through-hole 3a1 extends in the longitudinal direction X of the link body 3 and communicates with the recess 3a2.
- the through hole 3pa is exposed from the side of the link body 3 through the through hole 3a1 and the recess 3a2.
- Each of the connecting part 3b and the b connecting part 3c is connected to the base part 3a.
- Each of the connecting portion 3 b and the connecting portion 3 c protrudes from the base portion 3 a to one side in the short direction Y of the link body 3.
- the connecting portion 3b is provided with a through hole 3ba
- the connecting portion 3c is provided with a through hole 3ca.
- the through hole 3ba is, for example, a cylindrical hole.
- the through hole 3ba and the through hole 3ca are arranged concentrically with each other.
- the through hole 3ba is a cylindrical hole.
- the through hole 3ba passes through the connecting portion 3b in the longitudinal direction X of the link body 3 while maintaining a single diameter.
- the through-hole 3 ca penetrates the connecting portion 3 c in the longitudinal direction X of the link body 3.
- the through hole 3ca has a large diameter part 3ca1 and a small diameter part 3ca2.
- Each of large diameter part 3ca1 and small diameter part 3ca2 is a cylindrical hole, for example.
- the large-diameter portion 3ca1 and the small-diameter portion 3ca2 communicate with each other and are arranged so as to be concentric with each other.
- the small diameter portion 3ca2 is located closer to the concave portion 3g than the large diameter portion 3ca1.
- the connecting part 3d is connected to the base part 3a.
- the connecting portion 3d protrudes from the base portion 3a to the other side of the link body 3 in the short direction Y.
- the connecting portion 3d protrudes on the side opposite to the connecting portions 3b and 3c with respect to the base portion 3a in the short direction Y of the link body 3.
- the connecting portion 3d is located on the opposite side of the region sandwiched between the connecting portion 3b and the connecting portion 3c with respect to the base portion 3a in the lateral direction Y of the link body 3.
- the connecting portion 3d is provided with a through hole 3da.
- the through hole 3da is, for example, a cylindrical hole.
- the through-hole 3da penetrates the connecting portion 3d in the longitudinal direction X of the link body 3 while maintaining a single diameter.
- Each of the rim portion 3ra and the rim portion 3rb is connected to the base portion 3a.
- Each of the rim portion 3ra and the rim portion 3rb protrudes in the longitudinal direction X of the link body 3 to the opposite side to the recess 3g with respect to the base portion 3a.
- the rim portion 3ra and the rim portion 3rb are arranged so as to sandwich the through hole 3a1 in the short direction Y of the link body 3.
- the rim portion 3ra is provided with a through hole 3ra1.
- the through hole 3ra1 passes through the rim 3ra in the short direction Y of the link body 3.
- Limiting members (bolts 8 and nuts 9) are attached to the through hole 3ra1.
- the bolt 8 is inserted through the through hole 3ra1 and the nut 9 is screwed to the bolt 8. Accordingly, the bolt 8 is fixed to the rim portion 3ra.
- the link portion 3LB has a configuration that is substantially line-symmetric with the link portion 3LA with respect to the center line CL in the longitudinal direction X of the link body 3.
- the configuration of the link portion 3LB is different from the configuration of the link portion 3LA in the shape of the through hole 3pb and the point having the limiting member (bolt 5 and nut 6).
- the through hole 3pb is provided in the base 3a so as to connect the recess 3a2 and the recess 3g of the link 3LB.
- the through hole 3pb is, for example, a cylindrical hole.
- the through hole 3pb passes through the base 3a in the longitudinal direction X of the link body 3 while maintaining a single diameter.
- a through hole 3a3 (FIG. 3) is provided in a portion of the base portion 3a of the link portion 3LB located between the recessed portion 3g and the recessed portion 3a2.
- Limiting members (bolts 5 and nuts 6) are attached to the through holes 3a3.
- the bolt 5 is inserted through the through hole 3 a 3, and the nut 6 is screwed to the bolt 5.
- the bolt 5 is fixed to the base portion 3a.
- the configuration of the link unit 3LB other than the above is substantially the same as the configuration of the link unit 3LA described above. For this reason, the same code
- the crawler plate portion 3TS having the grouser 3TSg is integrated with the link portions 3LA and 3LB.
- the through holes 3ca, 3da, 3pb are arranged on a straight line along the short direction Y of the link body 3.
- the through holes 3ca, 3da, 3pa are also arranged on a straight line along the short direction of the link body 3.
- the through hole 3pb, the large diameter portion 3pa1 of the through hole 3pa, and the through hole 2ca of the mounting portion 2c have a diameter equal to or larger than the diameter D1a of the mounting pin 4.
- the small diameter portion 3pa2 of the through hole 3pa has a diameter D2a smaller than the diameter D1a of the mounting pin 4.
- the insertion of the mounting pin 4 can be stopped at the boundary between the large diameter portion 3pa1 and the small diameter portion 3pa2. Thereby, it becomes easy to position the mounting pin 4 when the mounting pin 4 is inserted.
- the portion of the link body 3 is not located in the side region RS of the small diameter part 3pa2. For this reason, one end face of the mounting pin 4 inserted into each hole 3pb, 2ca, 3pa1 is exposed from the side of the link body 3 through the small diameter portion 3pa2. Thereby, the one end surface of the attachment pin 4 can be pushed through the small diameter part 3pa2 from the arrow AR direction in the figure. The attachment pin 4 can be pulled out from the through holes 3pb, 2ca, 3pa1 by the pressing force.
- a limiting member (bolt 5 and nut 6) is positioned on the other end face side of the mounting pin 4 in the axial direction of the mounting pin 4 inserted into each of the holes 3pb, 2ca and 3pa1. Since the limiting members 5 and 6 are positioned in the axial direction of the mounting pin 4, the mounting pin 4 is prevented from coming out of the holes 3pb, 2ca, and 3pa1. Further, by removing the restricting members 5 and 6 from the link main body 3, the mounting pin 4 can be pulled out from the holes 3pb, 2ca, and 3pa1.
- the through hole 3ba, the through hole 3da, and the large diameter portion 3ca1 of the through hole 3ca have a diameter equal to or larger than the diameter D1b of the connecting pin 7.
- the small diameter portion 3ca2 of the through hole 3ca has a diameter D2b smaller than the diameter D1b of the connecting pin 7.
- the connecting pin 7 when the connecting pin 7 is inserted into the through hole 3ba, the through hole 3da, and the through hole 3ca, the insertion of the connecting pin 7 can be stopped at the boundary between the large diameter portion 3ca1 and the small diameter portion 3ca2. Thereby, it becomes easy to position the connecting pin 7 when the connecting pin 7 is inserted.
- the portion of the link body 3 is not located in the side region RS of the small diameter part 3pa2. For this reason, one end surface of the connecting pin 7 inserted in each hole 3ba, 3da, 3ca is exposed from the link body 3 through the small diameter portion 3ca2. Thereby, the one end surface of the connection pin 7 can be pushed through the small diameter part 3ca2. The connecting pin 7 can be pulled out from the through holes 3ba, 3da, 3ca by the pressing force.
- a limiting member (bolt 8 and nut 9) is located on the other end face side of the connecting pin 7 inserted into each hole 3ba, 3da, 3ca. Since the limiting members 8 and 9 are positioned in the axial direction of the connecting pin 7, the connecting pin 7 is prevented from coming out of the holes 3ba, 3da, and 3ca. Further, by removing the restricting members 8 and 9 from the link body 3, the connecting pin 7 can be pulled out from the holes 3ba, 3da and 3ca.
- connection state of the crawler belt links 1 and the attachment state of the link attachment body 2 to the link body 3 in the present embodiment will be described with reference to FIGS.
- FIG. 7 is a cross-sectional perspective view showing a configuration in which two crawler belt links are connected along the line VIA-VIA in FIG. 5 (A).
- FIG. 8 is a cross-sectional perspective view showing a configuration in which two crawler belt links are connected along the line VIII-VIII in FIG. 6 (B).
- the connecting portion 3 d of the other crawler belt link 1 is inserted between the pair of connecting portions 3 b and 3 c of the one crawler belt link 1.
- the through hole 3ba of the connecting portion 3b, the through hole 3ca of the connecting portion 3c, and the through hole 3da of the connecting portion 3d are arranged concentrically with each other.
- the connecting pin 7 is inserted into the through holes 3ba, 3ca, 3da arranged concentrically. Thereby, one crawler belt link 1 and the other crawler belt link 1 are connected.
- the mounting portion 2c of the link mounting body 2 is inserted into the concave portion 3g2 of the link main body 3.
- the through holes 3pa and 3pb of the link body 3 and the through hole 2ca of the mounting portion 2c are arranged concentrically.
- a mounting pin 4 is inserted into the through holes 3pa, 3pb, 2ca arranged concentrically.
- the link attachment body 2 is in contact with the link body 3 in a state where the link attachment body 2 is attached to the link body 3.
- the lower surface of the lower end portion of the protrusion 2 b of the link attachment body 2 is in contact with the link body 3.
- each side surface of the concave portions 3g1 to 3g5 is brought into contact with the link attachment body 2 so that it can receive a thrust load when the crawler belt device 10 is rotationally driven.
- the link attachment body 2 is attached to the link body 3 by the attachment pins 4 as shown in FIG.
- the link attachment body 2 can be removed from the link body 3 by removing the attachment pins 4 from the link attachment body 2 and the link body 3.
- the wear portion (the protrusion 2b and the protrusion 2b) can be removed by removing the link attachment 2 from the link body 3 without releasing the coupling between the crawler belt links 1. Maintenance of the tread 2a) becomes possible.
- the two protrusions 2b are arranged on both sides of the plate portion with the plate portion having the tread surface 2a interposed therebetween. Thereby, it can mesh with the drive wheel 21 by both of the two protrusions 2b sandwiching the tread 2a. For this reason, the two protrusions 2b and the drive wheel 21 can be stably engaged with each other.
- the mounting pin 4 is inserted into the through holes 3pa, 3pb, 2ca.
- the link attachment body 2 can be detachably attached to the link body 3 by inserting / removing the attachment pins 4 into / from the through holes 3pa, 3pb, 2ca.
- attachment member 4 for attaching the link attachment body 2 to the link body 3 is the attachment pin 4
- the attachment member 4 is not limited to this.
- the attachment member 4 may be, for example, a bolt or the like as long as the link attachment body 2 can be attached to and detached from the link body 3.
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- Engineering & Computer Science (AREA)
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
- Vehicle Body Suspensions (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
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Abstract
Description
これにより履帯リンクの駆動時にリンク取付体に作用する外力は、リンク本体に作用し、取付ピンには作用しない。このように取付ピンに作用する負荷を軽減することができるため履帯リンクの耐久性が向上する。
まず、本発明の一実施の形態における作業車両の構成について説明する。以下、本発明の思想を適用可能な作業車両の一例として油圧ショベルについて図1を用いて説明する。なお本発明は油圧ショベル以外にブルドーザなどの装軌式作業車両にも適用可能である。
図3は、図2の走行体に含まれる履帯装置の構成の一部を概略的に示す分解斜視図である。図3に示されるように、上記の履帯装置10は、複数の履帯リンク1と、複数の履帯リンク1を連結する連結ピン7とを主に有している。
本実施の形態における履帯リンク1によれば、図3に示されるように、リンク取付体2は取付ピン4によりリンク本体3に取り付けられている。この取付ピン4をリンク取付体2およびリンク本体3から取り外すことにより、リンク本体3からリンク取付体2を取り外すことができる。これにより、リンク取付体2の突起部2bおよび踏面2aが摩耗した場合でも、履帯リンク1同士の結合を解くことなく、リンク本体3からリンク取付体2を取り外すことにより摩耗部(突起部2bおよび踏面2a)のメンテナンスが可能となる。
Claims (11)
- 履板部とリンク部とが一体化されて構成されたリンク本体と、
前記リンク本体と別部品からなり、かつ踏面を有するプレート部と、前記プレート部と一体化されて前記踏面から突き出す突起とを有するリンク取付体と、
前記プレート部に対して前記突起とは反対側において、前記リンク取付体を前記リンク本体に取り付ける取付部材とを備えた、履帯リンク。 - 前記取付部材は取付ピンである、請求項1に記載の履帯リンク。
- 前記突起は、それぞれが前記プレート部と一体化されて前記踏面から突き出す第1の突起部および第2の突起部を含み、
前記第1の突起部および前記第2の突起部は、前記プレート部を挟んで前記プレート部の両側に配置されている、請求項2に記載の履帯リンク。 - 前記リンク取付体には第1のピン挿入用孔が形成されており、前記リンク本体には第2のピン挿入用孔が形成されており、
前記取付ピンは前記第1のピン挿入用孔と前記第2のピン挿入用孔との双方に挿入されている、請求項2または請求項3に記載の履帯リンク。 - 前記第2のピン挿入用孔は、一方端部側に位置する第1の孔部と他方端部側に位置する第2の孔部とを有し、
前記第1の孔部は前記取付ピンの直径以上の径を有し、前記第2の孔部は前記取付ピンの直径よりも小さい径を有している、請求項4に記載の履帯リンク。 - 前記第2の孔部を通じて前記取付ピンの端面が前記リンク本体から露出している、請求項5に記載の履帯リンク。
- 前記リンク本体に取り付けられ、かつ前記取付ピンの軸方向の移動を制限する制限部材をさらに備えた、請求項2から請求項6のいずれか1項に記載の履帯リンク。
- 前記リンク取付体は前記リンク本体と当接している、請求項1から請求項7のいずれか1項に記載の履帯リンク。
- 踏面を有するプレート部と、
前記プレート部と一体化されて前記踏面から突き出す突起と、
前記プレート部に取り付けられ、前記プレート部に対して前記突起と反対側に延び、かつ取付部材用孔を有する取付部とを備えた、リンク取付体。 - 前記取付部材用孔はピン挿入孔である、請求項9に記載のリンク取付体。
- 前記突起は、それぞれが前記プレート部と一体化されて前記踏面から突き出す第1の突起部および第2の突起部を含み、
前記第1の突起部および前記第2の突起部は、前記プレート部を挟んで前記プレート部の両側に配置されている、請求項9または請求項10に記載のリンク取付体。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2017546343A JP6612889B2 (ja) | 2015-10-22 | 2015-10-22 | 履帯リンクおよびリンク取付体 |
AU2015412299A AU2015412299B2 (en) | 2015-10-22 | 2015-10-22 | Crawler track link and link attachment body |
PCT/JP2015/079852 WO2017068687A1 (ja) | 2015-10-22 | 2015-10-22 | 履帯リンクおよびリンク取付体 |
DE112015006752.3T DE112015006752B4 (de) | 2015-10-22 | 2015-10-22 | Kettenglied und Kettenglied-Anbringungsteil |
US15/748,322 US11008057B2 (en) | 2015-10-22 | 2015-10-22 | Track link and link mounted part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2015/079852 WO2017068687A1 (ja) | 2015-10-22 | 2015-10-22 | 履帯リンクおよびリンク取付体 |
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US (1) | US11008057B2 (ja) |
JP (1) | JP6612889B2 (ja) |
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Cited By (3)
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US10919588B2 (en) | 2018-02-23 | 2021-02-16 | Caterpillar Inc. | Track pin and bushing retention design for a track chain |
CN113396099A (zh) * | 2019-02-06 | 2021-09-14 | 卡特彼勒公司 | 具有用于筒销保持的销止挡件的机器履带中的履带接头组件 |
US11807320B2 (en) | 2017-05-04 | 2023-11-07 | Caterpillar Inc. | Pin retention design for a track chain |
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MY187325A (en) * | 2015-11-24 | 2021-09-22 | Byondis Bv | Anti-5t4 antibodies and antibody-drug conjugates |
WO2017219067A1 (en) * | 2016-06-24 | 2017-12-28 | Antonino Restifo | Tracked vehicle shoes |
BR102018016476B1 (pt) * | 2018-08-13 | 2021-08-31 | Vale S.A | Sapata flexível para esteira sem-fim de máquinas de grande porte e método de fabricação da sapata flexível |
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- 2015-10-22 JP JP2017546343A patent/JP6612889B2/ja active Active
- 2015-10-22 DE DE112015006752.3T patent/DE112015006752B4/de active Active
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CN113396099A (zh) * | 2019-02-06 | 2021-09-14 | 卡特彼勒公司 | 具有用于筒销保持的销止挡件的机器履带中的履带接头组件 |
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Also Published As
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US20180215427A1 (en) | 2018-08-02 |
AU2015412299B2 (en) | 2019-04-18 |
DE112015006752B4 (de) | 2022-09-22 |
DE112015006752T5 (de) | 2018-04-12 |
AU2015412299A1 (en) | 2018-02-22 |
US11008057B2 (en) | 2021-05-18 |
JPWO2017068687A1 (ja) | 2018-08-16 |
JP6612889B2 (ja) | 2019-11-27 |
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