WO2013175667A1 - 履帯連結装置 - Google Patents
履帯連結装置 Download PDFInfo
- Publication number
- WO2013175667A1 WO2013175667A1 PCT/JP2012/083248 JP2012083248W WO2013175667A1 WO 2013175667 A1 WO2013175667 A1 WO 2013175667A1 JP 2012083248 W JP2012083248 W JP 2012083248W WO 2013175667 A1 WO2013175667 A1 WO 2013175667A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crawler belt
- pin
- hole
- belt link
- link
- Prior art date
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Classifications
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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
-
- 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
-
- 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
Definitions
- the present invention relates to a crawler belt coupling device, and more particularly to a crawler belt coupling device provided with a master pin.
- the track includes a track link chain in which a plurality of track links are connected.
- the crawler belt is detached from the traveling device, the connection of the crawler belt link chain is released.
- a method of releasing the connection of the crawler belt link chain for example, there is a method of removing a master pin that connects the crawler belt links from the crawler belt link.
- Patent Document 1 proposes an apparatus having a retaining pin that allows a master pin to be attached to and detached from the crawler belt link and prevents the master pin from being removed from the crawler belt link. Yes.
- the master pin can be attached to and detached from the crawler belt link without using a press by inserting and removing the retaining pin.
- a hook is provided at one end of the master pin, and a retaining pin can be inserted at the other end.
- the crawler belt link is provided with a locking boss that engages with the collar of the master pin. The engagement of the master pin with respect to the crawler belt link can be suppressed by the engagement of the heel of the master pin and the locking boss of the crawler belt link.
- the locking boss is worn by the contact of the crest corner of the master pin with the locking boss of the crawler belt link as the crawler belt is used. This increases the gap between the crawler belt locking boss and the master pin heel, so that the master pin rotates around the crawler belt link. Furthermore, there is a possibility that the master pin may come off from the crawler belt link.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a crawler belt coupling device that can improve the workability of the crawler belt detachment and can prevent the master pin from falling off the crawler belt link. Is to provide.
- the crawler belt coupling device of the present invention is a crawler belt coupling device for connecting a crawler belt having a plurality of crawler belt links to form an endless crawler belt.
- the apparatus includes a first crawler belt link, a master pin, a first knock pin, a first recess, and a first snap ring.
- the first crawler belt link has a first through hole, and has a first notch on the inner peripheral surface of the first through hole.
- the master pin is inserted into the first through hole of the first crawler belt link and has a second notch on the outer peripheral surface.
- the first recess is composed of a first notch and a second notch, and the opening is at the end of the first through hole.
- the first knock pin is arranged with one end surface thereof facing the opening.
- the first snap ring has a C-shape, and is arranged with a gap on one end face of the first knock pin or in contact with one end face.
- the first snap ring since the first snap ring has a C shape, the first snap ring can be easily attached to and detached from the master pin.
- the master pin can be detached from the first crawler belt link by detaching the first snap ring. Therefore, the master pin can be attached to and detached from the first crawler belt link without using a press machine. Therefore, the workability of removing and installing the crawler belt can be improved.
- a first knock pin is disposed in a first recess formed by the first notch of the first crawler belt link and the second notch of the master pin.
- the first snap ring is fixed so that the first knock pin is sandwiched between the bottom of the first recess. Thereby, it can prevent that a 1st knock pin remove
- a first circumferential groove is provided on the outer peripheral surface of the master pin, and a first snap ring is fitted into the first circumferential groove.
- the first snap ring can be securely fixed at a predetermined position, so that the master pin can be prevented from falling off.
- the master pin is engaged with the first through hole of the first crawler belt link with an intermediate fit. According to the crawler belt coupling apparatus of the present invention, the master pin can be attached to and detached from the first crawler belt link without using a press machine.
- the crawler belt coupling apparatus includes a second crawler belt link that is paired with the first crawler belt link, a second knock pin, and a second snap ring.
- the second crawler belt link has a second through hole into which the master pin is inserted, and has a third notch on the inner surface of the second through hole.
- the first crawler belt link is disposed on one end side of the master pin, and the second crawler belt link is disposed on the other end side of the master pin.
- the master pin has a fourth notch and a second circumferential groove on the outer peripheral surface.
- the second knock pin is composed of third and fourth cutouts, and the other end face is disposed on the opening side in the second recess having an opening at the end of the second through hole.
- the second snap ring has a C-shape, and is arranged with a gap on the other end surface of the second knock pin or in contact with the other end surface.
- the second crawler belt link is arranged on the other end side of the master pin on which the first crawler belt link is arranged on the one end side. Then, the master pin can be detached from the second crawler belt link by detaching the second snap ring. Therefore, the second knock pin can be attached to and detached from the second crawler belt link without using a press machine. Therefore, the workability of attaching / detaching the crawler belt can be improved in both the first and second crawler belt links.
- a second knock pin is disposed in a second recess formed by the third notch of the second crawler belt link and the fourth notch of the master pin.
- the second snap ring is disposed with a gap or in contact with the other end surface of the second knock pin. Therefore, it can prevent that a 2nd knock pin remove
- the first crawler belt link of the crawler belt coupling device includes a first through hole on one end side in the longitudinal direction and a third through hole on the other end side. And the said 1st recessed part is provided in the site
- the first knock pin has the same cross-sectional shape perpendicular to the axial direction from one end in the axial direction to the other end.
- the 1st knock pin can contact the 1st crevice uniformly in the direction of an axis. For this reason, it can suppress that a 1st recessed part is worn out.
- the first knock pin has a cylindrical shape. Therefore, since it is cylindrical, it can be in surface contact with the first recess. For this reason, it can suppress that a 1st recessed part is worn out.
- FIG. 1 is a perspective view schematically showing a configuration of a work vehicle in an embodiment of the present invention. It is a side view which shows roughly the structure of the lower traveling body of the working vehicle in one embodiment of this invention. It is an enlarged view which shows the crawler belt in the P1 part of FIG.
- FIG. 4 is an enlarged view around a master pin in FIG. 3.
- FIG. 5 is a partial sectional view taken along line VV in FIG. 3.
- FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is an enlarged view which shows the 1st and 2nd crawler belt link etc. in the P2 part of FIG.
- FIG. 8 is an enlarged view of the main portion of FIG. 7 with the snap ring removed.
- FIG. 1 It is a schematic perspective view of the 1st knock pin in one embodiment of this invention. It is a figure which shows the state by which the connection of the crawler belt coupling apparatus in one embodiment of this invention was cancelled
- a work vehicle (hydraulic excavator) 1 mainly includes a lower traveling body 2, an upper swing body 3, and a work implement 4.
- the lower traveling body 2 is configured to be capable of self-running as will be described in detail later.
- the upper turning body 3 is installed on the lower traveling body 2 so as to be turnable.
- the work machine 4 is pivotally supported on the front side of the upper swing body 3 so as to be raised and lowered.
- This work machine 4 has, for example, a boom, an arm, a bucket, a hydraulic cylinder, and the like.
- the work vehicle main body is mainly composed of the lower traveling body 2 and the upper turning body 3 described above.
- the upper swing body 3 has a cab 5 on the front left side (front side of the vehicle) and an engine room 6 for accommodating the engine on the rear side (rear side of the vehicle) and a counterweight 7.
- the front, rear, left and right of the vehicle are based on an operator seated in the cab 5.
- the lower traveling body 2 is configured such that a work vehicle (hydraulic excavator) 1 travels when a pair of left and right crawler belts 10 are rotationally driven.
- the lower traveling body 2 mainly includes a crawler belt 10, a turning device 11, a track frame 12, an idler wheel (idler) 13, a drive wheel (sprocket) 14, an upper roller 15, and a lower roller 16.
- a crawler belt 10 mainly includes a crawler belt 10, a turning device 11, a track frame 12, an idler wheel (idler) 13, a drive wheel (sprocket) 14, an upper roller 15, and a lower roller 16.
- the crawler belt 10 has a crawler belt link chain 20 and a crawler plate 30 attached to the crawler belt link chain 20.
- the turning device 11 is configured to be able to turn the upper turning body 3 (FIG. 1), and is provided at the upper end of the lower traveling body 2.
- the track frames 12 are provided so as to extend in the vehicle front-rear direction on both sides of a center frame that is a mounting base for the turning device 11.
- the idler wheel 13 is rotatably provided at the front end of the track frame 12, and the drive wheel 14 is rotatably provided at the rear end of the track frame 12.
- the plurality of upper rollers 15 are provided on the upper surface side of the track frame 12, and the plurality of lower rollers 16 are provided on the lower surface side of the track frame 12.
- an elevator ladder 17 is attached to the lower traveling body 2. In FIG. 1, the lifting ladder 17 is not shown.
- the crawler belt 10 is wound around an idler wheel 13 and a drive wheel 14.
- the crawler belt 10 is supported by an upper roller 15 and a lower roller 16 disposed between the idler wheel 13 and the drive wheel 14.
- the crawler plate 30 is rotationally driven. In this way, the crawler belt 10 is driven to rotate. Thereby, the lower traveling body 2 is self-propelled.
- the crawler belt link chain 20 of the crawler belt 10 is constituted by a plurality of crawler belt links 20a connected endlessly.
- the crawler plates 30 are respectively fixed to the ground contact surface (outer surface) side of the plurality of crawler belt links 20a.
- Bolts 43 are inserted from the outer surface side of the crawler plate 30 into through holes provided in the crawler plate 30 and the crawler belt link 20a, and a nut 44 is provided at the tip of the bolt 43 on the non-grounding surface (inner surface) side of the crawler belt link 20a. It is screwed.
- the crawler plate 30 is fixed to the outer end surface of the crawler belt link 20 a by these bolts 43 and nuts 44.
- the crawler belt link 20 a at one location of the crawler belt link chain 20 has a first crawler belt link 21 and a second crawler belt link 31.
- the first crawler belt link 21 and the second crawler belt link 31 are spaced apart and arranged in parallel in a direction (crawler belt width direction) orthogonal to the connection direction of the crawler belt link chain 20.
- the first crawler belt link 21 and the second crawler belt link 31 are formed symmetrically.
- the plurality of crawler belt links 20a are pivotally supported by the crawler belt pins 34 and connected to each other so as to be rotatable to form a belt-like crawler belt link chain 20.
- a pin that connects the crawler belt links 20 a at both ends of the belt-shaped crawler belt link chain 20 to form an endless chain is referred to as a master pin 22.
- the first crawler belt link 21 and the second crawler belt link 31 in the present embodiment are each provided with a first through hole 21a and a second through hole 31a on one end side in the longitudinal direction, and on the other end side.
- a third through hole 21c and a fourth through hole 31c are provided.
- a master pin 22 is installed between one end of each of the first crawler belt link 21 and the second crawler belt link 31, and both end portions of the master pin 22 are fixed in the first and second through holes 21a and 31a, respectively. ing.
- One end of each of the first crawler belt link 21 and the second crawler belt link 31 is disposed outside one adjacent crawler belt link 20a.
- the outside means a direction away from the center of the crawler belt width direction in the crawler belt width direction (vertical direction in FIG. 5).
- a crawler belt bushing 41 is disposed between one end portions of the first crawler belt link 21 and the second crawler belt link 31.
- the crawler belt bushing 41 is rotatably fitted to the master pin 22.
- the crawler belt bushing 41 is fixed to the third and fourth through holes 21c and 31c of one adjacent crawler belt link 20a. Therefore, the first crawler belt link 21 and the second crawler belt link 31 and the adjacent one of the crawler belt links 20a are coupled to each other via the crawler belt bush 41 so as to be rotatable.
- the crawler belt bushing 41 is formed so as to mesh with the teeth of the drive wheel (sprocket) 14.
- the seal ring 42 is disposed in a recessed portion formed on the inner surface of the crawler belt link 20 a in a state in contact with the end surface of the crawler belt bush 41.
- a crawler belt pin 34 is installed on the other end of each of the first crawler belt link 21 and the second crawler belt link 31.
- the other ends of the first crawler belt link 21 and the second crawler belt link 31 are disposed inside the other adjacent crawler belt link 20a.
- a crawler belt bushing 41 is arranged between the other ends of the first crawler belt link 21 and the second crawler belt link 31.
- the crawler belt bushing 41 is rotatably fitted to the crawler belt pin 34.
- the crawler belt bushing 41 is inserted and fixed in the third through hole 21c of the first crawler belt link 21 and the fourth through hole 31c of the second crawler belt link 31. Therefore, the first crawler belt link 21 and the second crawler belt link 31 and the other adjacent crawler belt link 20a are connected to each other via the crawler belt bush 41 so as to be rotatable.
- the end portion of the crawler belt pin 34 is press-fitted into the first and second through holes 21a and 31a of the other adjacent crawler belt link 20a, and is firmly fixed by an interference fit.
- the crawler belt pin 34 is press-fitted into the other crawler belt link 20a at 160 kN (kilonewtons).
- the end portion of the master pin 22 is press-fitted into the through hole 21a of the first crawler belt link and the through hole 31a of the second crawler belt link 31 with a force smaller than that of the crawler belt pin 34. And engaged with an intermediate fit rather than an interference fit.
- the intermediate fitting is a fitting in which the maximum allowable dimension of the pin diameter of the master pin 22 is larger than the minimum allowable dimension of the hole diameter of the through holes 21a and 31a, and the minimum allowable dimension of the pin diameter is smaller than the maximum allowable dimension of the hole diameter. Means.
- the intermediate fit is also called a dead fit. That is, the master pin 22 is fixed to the extent that it does not move due to the fit between the pin outer peripheral surface and the through-hole inner peripheral surface. For example, the master pin 22 is press-fitted into the first and second crawler belt links 21 and 31 at 16 kN.
- the crawler belt coupling apparatus of the present embodiment will be described with reference to FIGS.
- the crawler belt coupling device is a device that is provided on the link at the end of the end-banded crawler belt link chain 20 and connects both ends of the link chain to form an endless crawler belt link chain 20. It should be noted that the crawler belt coupling device of the present embodiment may be provided on at least one side of the crawler belt link 20a, or may be provided on both sides of the crawler belt link 20a.
- the crawler belt coupling apparatus includes a first crawler belt link 21, a master pin 22, a first knock pin 25, and a first snap ring 26.
- the first crawler belt link 21 has one end portion, the other end portion, and an italic portion disposed between the one end portion and the other end portion.
- the first crawler belt link 21 has a first through hole 21a provided at one end.
- the first crawler belt link 21 has a first notch 21b on the inner peripheral surface outside the first through hole 21a.
- the first cutout 21b is formed at the end of the first crawler belt link 21 as shown in FIG.
- the first notch 21b is formed in a part of a substantially cylindrical shape extending in the axis A direction of a master pin 22 to be described later.
- the master pin 22 is a cylindrical part having a central axis A that is inserted into the first through hole 21 a of the first crawler belt link 21.
- the master pin 22 has a second notch 22b and a first circumferential groove 22c on the outer peripheral surface 22a.
- the second notch 22 b is formed at the end of the master pin 22.
- the second notch 22 b is formed in a part of a substantially cylindrical shape extending in the axis A direction from the end surface of the master pin 22.
- 1st recessed part 24 is comprised from the 1st notch 21b and the 2nd notch 22b.
- the first recess 24 is formed by the first notch 21b and the second notch 22b facing each other.
- the first recess 24 has a cylindrical inner space.
- the central axis of the first recess 24 is parallel to the central axis A of the master pin 22.
- the first knock pin 25 is disposed in the first recess 24 with one end face being on the opening side of the recess. That is, the length of the first knock pin 25 is shorter than the depth of the first recess 24.
- the first knock pin 25 has an axis B along the axis A direction of the master pin 22.
- the axis B coincides with the central axis of the first recess 24. That is, the insertion / extraction direction of the first knock pin 25 and the insertion / extraction direction of the master pin 22 are the same.
- the first knock pin 25 is intermediately fitted in the first recess 24.
- the first knock pin 25 presses the inner peripheral surface of the first recess 24, so that it is difficult for the first knock pin 25 to come out of the first recess 24.
- the first knock pin 25 continuously contacts the first recess 24 in the circumferential direction on the outer peripheral surface. Further, the first knock pin 25 is in contact with the first recess 24 along the entire outer peripheral surface.
- the knock pin 25 since the knock pin 25 is prevented from coming out of the first recess 24 by a first snap ring 26 described later, the fit between the first knock pin 25 and the first recess 24 may be a clearance fit. . In this case, the first knock pin 25 can be easily removed from the first recess 24 by removing the first snap ring 26.
- the first knock pin 25 is disposed on the crawler belt pin 34 side that engages with the other end portion of the first crawler belt link 21 of the first through hole 21a.
- the first notch 21b is disposed in the first through hole 21a in the first crawler belt link 21 at a position closest to the through hole at the other end.
- the first crawler belt link 21 is formed so as to extend from one end portion where the first through hole 21a is provided toward the other end portion where the crawler belt pins 34 are disposed. With this shape, the crawler belt pin 34 can be formed thicker than the opposite side of the crawler belt pin 34 with respect to the first through hole 21a.
- the notch 21b for the first knock pin 25 is provided on the crawler belt pin 34 side of the link 21, the stress acting on the first crawler belt link 21 does not become relatively large.
- the notch 21b is preferably provided on the crawler belt pin 34 side of the crawler belt link 21, that is, the portion closest to the other through hole of the crawler belt link 21.
- the first knock pin 25 has a cylindrical shape having a central axis B.
- the first knock pin 25 has the same cross-sectional shape perpendicular to the axial direction from one end in the axis B direction to the other end.
- the height of the first knock pin 25 is larger than the diameter. That is, the longitudinal direction of the first knock pin 25 is the axis B direction.
- the shape of the knock pin 25 is not limited to a cylinder.
- the notch 21 b of the crawler belt link 21 and the notch b of the master pin 22 have a shape corresponding to the shape of the knock pin 25.
- the knock pin 25 may have a truncated cone shape.
- the first snap ring 26 has a C-shape.
- the first snap ring 26 has an annular shape, and a notch is formed in a part thereof. By expanding this notch, the first snap ring 26 can be increased in diameter.
- the first snap ring 26 is fitted in the first circumferential groove 22c so as to be positioned in the direction in which the first knock pin 25 is removed from the first recess 24.
- the first snap ring 26 is superimposed on the first knock pin 25 when the crawler belt coupling device is viewed from the outside of the crawler belt link 21. That is, the first snap ring 26 prevents the first knock pin 25 from coming out of the first recess 24.
- the first snap ring 26 is separated from the one end surface of the first knock pin 25 with a gap, but both may be in contact with each other.
- the first snap ring 26 may be singular or plural, and in the present embodiment, two first snap rings 26 are fitted in the first circumferential groove 22c.
- the crawler belt coupling device of the present embodiment includes a second crawler belt link 31, a second knock pin 32, and a second snap ring 33 as shown in the crawler belt link on the left side of FIG. May be.
- the first crawler belt link 21 is disposed on one end side of the master pin 22, and the second crawler belt link 31 is disposed on the other end side of the master pin 22.
- the second crawler belt link 31 has one end, the other end, and an italic part disposed between the one end and the other end.
- the second crawler belt link 31 has a second through hole 31a provided at one end.
- the master pin 22 is inserted into the second through hole 31a.
- the second crawler belt link 31 has a third notch 31b on the inner surface of the second through hole 31a.
- the third cutout 31 b is formed at the end of the second crawler belt link 31.
- the third notch 31 b is formed so as to extend in the axial direction of the master pin 22.
- the master pin 22 has a fourth notch 22d and a second circumferential groove 22e on the outer peripheral surface 22a.
- the fourth notch 22 d is formed at the end of the master pin 22.
- the fourth notch 22d is formed so as to extend from the end face of the master pin 22 in the axial direction.
- the 2nd recessed part 27 is comprised from the 3rd notch 31b and the 4th notch 22d.
- the second recess 27 is formed by the third notch 31b and the fourth notch 22d facing each other. It is preferable that the 2nd recessed part 27 has a cylindrical internal space.
- the second knock pin 32 is disposed in the second recess 27.
- the second knock pin 32 has an axis along the axial direction of the master pin 22.
- the second knock pin 32 is preferably intermediately fitted in the second recess 27.
- the second knock pin 32 presses the inner peripheral surface of the second recess 27 so that it is difficult to come out of the second recess 27.
- the 2nd knock pin 32 is continuously in contact with the 2nd recessed part 27 in the circumferential direction on the outer peripheral surface.
- the second knock pin 32 is in contact with the second recess 24 on the entire outer peripheral surface.
- the second snap ring 33 has a C shape.
- the second snap ring 33 has an annular shape, and a notch is formed in a part thereof.
- the diameter of the second snap ring 33 can be increased by widening the notch.
- the second snap ring 33 is fitted in the second circumferential groove 22e so as to sandwich the second knock pin 32 with the bottom 27a of the second recess 27.
- the second snap ring 33 is located in a direction along the axial direction of the master pin with respect to the second crawler belt link 31.
- the second snap ring 33 is preferably in contact with the second knock pin 32.
- the second snap ring 33 may be singular or plural. In the present embodiment, two second snap rings 33 are arranged side by side and fitted in the second circumferential groove 22e.
- master pin 22 has first crawler belt link 21, second crawler belt link 31, first crawler belt link 21, and second crawler belt link 31. By being pulled out from one of the crawler belt links 20a adjacent to the link, the connection is released.
- the master pin 22 is pulled out by the following procedure. First, by expanding the C-shaped notch of the first snap ring 26 and the second snap ring 33, the first snap ring 26 is removed from the first circumferential groove 22c, and the second snap ring 33 is It is removed from the second circumferential groove 22e. Then, the first snap ring 26 and the second snap ring 33 are removed from the end of the master pin 22, whereby the first snap ring 26 and the second snap ring 33 are removed from the master pin 22.
- the first knock pin 25 is taken out from the first recess 24 and the second knock pin 32 is taken out from the second recess 27.
- the master pin 22 is pulled out to either the first crawler belt link 21 or the second crawler belt link 31. Thereby, the connection of the crawler belt coupling device is released.
- the crawler belt connecting device when connecting the crawler belt connecting device again, it can be connected in the reverse procedure to that described above.
- the first crawler belt link 21 and the first crawler belt link 21 and the first snap ring 25 are removed by detaching the first knock pin 25, the first snap ring 26, the second knock pin 32, and the second snap ring 33.
- the master pin 22 can be attached to and detached from the two crawler belt links 31. Therefore, since the crawler belt 10 can be connected and released without using a press machine, the workability of attaching / detaching the crawler belt 10 can be improved.
- the master pin 22 can be pulled out by removing any of the first knock pin 25, the first snap ring 26, the second knock pin 32, and the second snap ring 33, so only one of them is removed. The connection may be released.
- the first circumferential groove 22c for locking the snap ring is provided on the outer periphery of the master pin 22, but as shown in FIGS. 11 and 12, the through hole 21a of the first crawler belt link 21 is provided. You may provide in an internal peripheral surface (1st circumferential groove 21d). In this embodiment, since there is no circumferential groove where stress may concentrate on the outer periphery of the master pin 22, the reliability of the master pin 22 is excellent.
- a second circumferential groove 31 d may be provided on the inner circumferential surface of the second through hole 31 a of the second crawler belt link 31.
- the crawler belt coupling apparatus of the present embodiment since the first snap ring 26 has a C shape, the first snap ring 26 can be easily detached from the master pin 22 or the first crawler belt link 21. be able to. Further, since the master pin 22 is not fixed to the first crawler belt link 21 by an interference fit unlike a normal crawler belt pin, the master pin 22 is attached to and detached from the first crawler belt link 21 by detaching the first snap ring 26. It is relatively easy to do. Therefore, the master pin 22 can be attached to and detached from the first crawler belt link 21 without using a press machine. Therefore, the workability of attaching / detaching the crawler belt 10 can be improved.
- a first knock pin 25 is disposed in a first recess 24 constituted by the first notch 21b of the first crawler belt link 21 and the second notch 22b of the master pin 22. Accordingly, the first knock pin 25 can be brought into surface contact with the first notch 21 b and the second notch 22 b in the first recess 24. For this reason, the master pin 22 is fixed so as not to rotate with respect to the first crawler belt link 21 even though the fit is an intermediate fit. Furthermore, it is possible to prevent the first knock pin 25 from hitting the first notch 21b and the second notch 22b. Therefore, it can suppress that the 1st recessed part 24 is worn out. Therefore, since it can suppress that a clearance gap arises between the 1st knock pin 25 and the 1st and 2nd notches 21b and 22b, it can control that master pin 22 falls from the 1st crawler belt link 21. be able to.
- the first snap ring 26 is provided at a position where the first knock pin 25 prevents the path from which the first knock pin 25 exits from the first recess 24. Thereby, the first snap ring 26 can prevent the first knock pin 25 from being detached from the first recess 24. Therefore, it is possible to prevent the first knock pin 25 from coming off and the master pin 22 from rotating with respect to the first crawler belt link 21.
- the first peripheral groove 22c is provided on the outer peripheral surface 22a of the master pin 22, and the first snap ring 26 is fitted into the first peripheral groove 22c.
- a circumferential groove 21d is provided on the inner circumferential surface of the through hole 21a of the crawler belt link 21, and a snap ring 26 is fitted into the circumferential groove 22c.
- the master pin 22 is engaged with the first through hole 21a of the first crawler belt link 21 with an intermediate fit. For this reason, the master pin 22 can be attached to and detached from the first crawler belt link 21 without using a press machine.
- the second crawler belt link 31 is arranged on the other end side of the master pin 22 where the first crawler belt link 21 is arranged on one end side.
- the master pin 22 can be detached from the second crawler belt link 31 by detaching the second snap ring 33. Therefore, the second knock pin 32 can be attached to and detached from the second crawler belt link 31 without using a press machine. Therefore, the workability of attaching and detaching the crawler belt 10 can be improved by both the first crawler belt link 21 and the second crawler belt link 31.
- the second knock pin 32 is disposed in the second recess 27 constituted by the third notch 31b of the second crawler belt link 31 and the fourth notch 22d of the master pin 22.
- the second knock pin 32 can come into surface contact with the third notch 31 b and the fourth notch 22 d in the second recess 27.
- the master pin 22 is fixed so that it cannot rotate with respect to the second crawler belt link 31 even though the fitting is an intermediate fit.
- the second snap ring 33 is fitted on the path through which the second knock pin 32 comes out of the second recess. As a result, the second snap ring 33 can prevent the second knock pin 32 from being detached from the second recess 27. Thereby, it is possible to prevent the second knock pin 32 from coming off and the master pin 22 from rotating with respect to the second crawler belt link 31.
- the first through hole 21a is connected to the crawler belt pin 34 side (that is, the first through hole 21a and another through hole side in the first crawler belt link 21a).
- a knock pin 25 is arranged.
- the stress acting on the first crawler belt link 21 is smaller on the crawler belt pin 34 side of the first through hole 21 a than on the side opposite to the crawler belt pin 34. Therefore, by arranging the first knock pin 25 on the crawler belt pin 34 side of the first through hole 21a, it is possible to suppress the occurrence of cracks due to stress around the first knock pin 25.
- the first knock pin 25 has the same cross-sectional shape perpendicular to the axial direction from one end in the axial direction to the other end. Thereby, the 1st knock pin 25 can contact the 1st recessed part 24 uniformly in an axial direction. For this reason, it can suppress that the 1st recessed part 24 is worn out.
- the first knock pin 25 has a cylindrical shape. Thereby, since it is cylindrical, it can be in surface contact with the first recess 24. For this reason, it can suppress that the 1st recessed part 24 is worn out.
- the present invention can be applied particularly advantageously to a crawler belt coupling device having a master pin.
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- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
Description
本発明の履帯連結装置によれば、プレス機を用いずに、マスタピンを第1の履帯リンクに脱着することが可能となる。
まず本発明の一実施の形態における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車両の一例である油圧ショベルについて説明するが、本発明はブルドーザなどの油圧ショベル以外の装軌車両にも適用可能である。
図5および図10を参照して、本実施の形態の履帯連結装置では、マスタピン22が第1の履帯リンク21および第2の履帯リンク31および第1の履帯リンク21および第2の履帯リンク31に隣接する一方の履帯リンク20aから引き抜かれることにより、連結が解除される。
本実施の形態の履帯連結装置によれば、第1のスナップリング26がC型形状を有しているため第1のスナップリング26をマスタピン22、あるいは第1の履帯リンク21に容易に脱着することができる。更に、マスタピン22は第1の履帯リンク21に対して通常の履帯ピンと異なり締り嵌めによって固定されていないので、第1のスナップリング26を脱着することでマスタピン22を第1の履帯リンク21に脱着することが比較的容易にできる。したがって、プレス機を用いずに第1の履帯リンク21にマスタピン22を脱着することができる。よって、履帯10の脱着の作業性を向上することができる。
Claims (7)
- 履帯リンクが複数連なる帯状の履帯を連結して無端状の履帯とするための履帯連結装置であって、
第1の貫通孔を有し、前記第1の貫通孔の内周面に第1の切欠を有する第1の履帯リンクと、
前記第1の履帯リンクの前記第1の貫通孔に挿入され、かつ外周面に第2の切欠を有するマスタピンと、
前記第1および第2の切欠から構成され前記第1の貫通孔端部に開口を有する第1の凹部と、
前記第1の凹部内に一端面を前記開口側にして配置される第1のノックピンと、
C型形状を有し、前記第1のノックピンの前記一端面に隙間を隔てて、あるいは前記一端面に当接して配置される第1のスナップリングとを備えた、履帯連結装置。 - 前記マスタピンの外周面に配設される第1の周溝を備え、
前記第1のスナップリングは前記第1の周溝内に配設される、請求項1に記載の履帯連結装置。 - 前記マスタピンは前記第1の貫通孔に中間嵌めで係合する、請求項1または2に記載の履帯連結装置。
- 前記マスタピンを挿入される第2の貫通孔を有し、前記第2の貫通孔の内周面に第3の切欠を有する、前記第1の履帯リンクと対になる第2の履帯リンクを備え、
前記第1の履帯リンクは前記マスタピンの一方端側に配置され、かつ前記第2の履帯リンクは前記マスタピンの他方端側に配置され、
前記マスタピンは前記外周面に第4の切欠および第2の周溝を有し、さらに
前記第3および第4の切欠から構成され前記第2の貫通孔端部に開口を有する第2の凹部内に配置され、他端面を前記開口側に配置される第2のノックピンと、
C型形状を有し、前記第2のノックピンの前記他端面に隙間を隔てて、あるいは前記他端面に当接して配置される第2のスナップリングとを備えた、請求項2または3に記載の履帯連結装置。 - 前記第1の貫通孔は前記第1の履帯リンクの長手方向一端側に配置され、
前記第1の履帯リンクの長手方向他端側に第3の貫通孔が配置され、
前記第1の凹部は前記第1の貫通孔の前記第3の貫通孔に最も近い部位に設けられる、
請求項1~4のいずれかに記載の履帯連結装置。 - 前記第1のノックピンは前記軸方向の一方端から他方端に至るまで前記軸方向に垂直な断面の形状が同じである、請求項1~5のいずれかに記載の履帯連結装置。
- 前記第1のノックピンは円柱形状を有している、請求項1~6のいずれかに記載の履帯連結装置。
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KR1020147018031A KR101560113B1 (ko) | 2012-05-24 | 2012-12-21 | 크롤러 트랙 연결 장치 |
CN201280058867.1A CN103958334B (zh) | 2012-05-24 | 2012-12-21 | 履带连结装置 |
DE112012004817.2T DE112012004817B4 (de) | 2012-05-24 | 2012-12-21 | Raupe-Ketten-Verbindungsvorrichtung |
US14/353,919 US9387894B2 (en) | 2012-05-24 | 2012-12-21 | Crawler belt coupling apparatus |
IN5773DEN2014 IN2014DN05773A (ja) | 2012-05-24 | 2014-07-10 |
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JP2012-118573 | 2012-05-24 | ||
JP2012118573A JP5247913B1 (ja) | 2012-05-24 | 2012-05-24 | 履帯連結装置 |
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JP (1) | JP5247913B1 (ja) |
KR (1) | KR101560113B1 (ja) |
CN (1) | CN103958334B (ja) |
DE (1) | DE112012004817B4 (ja) |
IN (1) | IN2014DN05773A (ja) |
WO (1) | WO2013175667A1 (ja) |
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Also Published As
Publication number | Publication date |
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KR20140105507A (ko) | 2014-09-01 |
DE112012004817T5 (de) | 2014-08-14 |
JP2013244783A (ja) | 2013-12-09 |
DE112012004817B4 (de) | 2018-09-27 |
US20140306517A1 (en) | 2014-10-16 |
US9387894B2 (en) | 2016-07-12 |
KR101560113B1 (ko) | 2015-10-13 |
JP5247913B1 (ja) | 2013-07-24 |
CN103958334A (zh) | 2014-07-30 |
IN2014DN05773A (ja) | 2015-04-10 |
CN103958334B (zh) | 2016-04-20 |
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