JP2006007896A - Foreign matter discharging structure of crawler type traveling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foreign matter discharging structure of a crawler type traveling device capable of easily and surely discharging foreign matter such as mud, muddy water, water and earth and sand, etc. from a region between an idler guide and an idler yoke and/or a motor case. <P>SOLUTION: In this device, a sliding surface of the idler guide 41ab for holding and supporting the idler yoke 42 connected to a rotary shaft 4s of an idler 4 is constituted to be inclined so that the idler 4 side may be lowered. Or, planar members (motor case lower rims 52Ab to 52Cb) for dividing lower sides of the motor cases 5A to 5C to store the motor for driving a sprocket 7 are constituted to be inclined so that sides isolated from the sprocket 7 may be lowered. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a crawler type traveling device used in, for example, a structure (lower structure) in a lower cab of a construction machine, and more specifically, a foreign matter discharging structure of such a crawler type traveling device. About.

  FIG. 43 shows an example of a construction machine. An upper structure U having a boom U1, an arm U2, a bucket U3, and an operation chamber U4 is supported by a lower structure B formed of a footwear type traveling device.

  The lower structure B has a configuration as shown in FIG. 44, for example. That is, it is schematically configured by a center frame 1J, a pair of left and right (two) side frames 2J, and a connecting member 3J that connects the center frame 1J and the side frame 2J.

Referring also to FIG. 43, the left and right side frames 2J have an idler 4 at the front end and a motor case 5 at the rear end. For example, a hydraulic drive motor 6 is attached to the motor case 5, and the sprocket 7 is rotated by the motor 6.
The idler 4 and the sprocket 7 are band-like and engaged with the inner peripheral side of an endless crawler belt (crawler) 8 so that the crawler 8 is rotated by the rotation of the sprocket.

Further, the upper roller 91 is rotated on the inner peripheral surface on the upper side of the crawler 8, and four lower rollers 92 in the illustrated example are rotated on the inner peripheral surface on the lower side of the crawler 8 while being in contact with the crawler 8. Is configured to do.
That is, the crawler 8 is configured to be wound around the sprocket 7, the idler 4, and the upper and lower rollers 91 and 92.

As shown in FIG. 45, in a conventional idler guide 41a, a cut and bent idler frame 41 is welded with square steel, angle steel and the like so that the idler yoke sliding surface 41s is horizontal.
By the sliding of the idler yoke sliding surface 41s, the idler 4 and the idler frame 41 move relative to each other as indicated by an arrow Y in FIG.
Details of such an idler guide are shown in FIGS.

In the example of FIG. 47, the steel plate 411 is bent so as to have an inclination for removing earth and sand, and a flat steel 412 having a narrow width is welded to the bent steel plate 411 to slide the sliding surface 41s, that is, an idler guide. Was forming.
In the example of FIG. 48, the angle steel 413 is faced and welded to a steel plate 411 (see FIG. 47) that is bent so as to be inclined, and an idler guide is formed to secure the sliding surface 41s. In addition, a space between the lower angle steel 413 and the bent steel plate 411 is reinforced with a narrow flat steel 412.
In the example of FIG. 49, one of the sliding surfaces 41s has a configuration in which a square bar 414 is welded to the bent flat bar 411.

  However, the conventional examples of FIGS. 47 to 49 require complicated welding assembly, and it is difficult to accurately assemble the interval and parallelism of the upper and lower sliding surfaces 41s. Therefore, in order to ensure accuracy, it is essential to position the jig during machining and welding, and it takes time for manufacturing.

Further, since the idler yoke sliding surface 41s is horizontal, the idler guides 412 (see FIG. 47), 413 (see FIG. 48), 413 and 414 (see FIG. 49), and the idler yoke 42 (see FIG. 45) There is a problem that foreign matter such as mud, muddy water, water, earth and sand, etc., are not easily discharged.
As a result, the slidability (slidability) between the idler guide and the idler yoke is deteriorated, and it becomes difficult to adjust the tension of the crawler belt and perform other maintenance. Furthermore, rusting is likely to occur.

On the other hand, when manufacturing the conventional motor case 5, as shown in FIG. 52, first, a steel plate or flat steel 520 is bent into a U shape to form the motor case rim 52, and the motor base 53 is provided with a motor. The side part of the case rim 52 is welded.
Then, the connection plate 21 is welded to the U-shaped opening of the motor case rim 52 with one surface welded to the motor base 5.
Note that the U-shaped opening of the motor case rim 52 and the connection plate 21 may be joined before joining the side portions of the motor base 53 and the motor case rim 52.

The rim portion 52 (see FIG. 50) of the conventional motor case 5 manufactured as described above is configured such that the inner side of the cross section is horizontal, as indicated by reference numeral H in FIG.
That is, the conventional motor case rim portion 52 shown in detail in FIG. 52 is formed by bending a steel plate or flat steel 520, so that it becomes horizontal as indicated by the symbol H in FIG.

Since there is a horizontal plane H (see FIG. 51) inside the motor case rim 52, foreign matter such as mud, muddy water, water, earth and sand enters the motor case 5 from the gap of the cover 54 of the motor case 5, and the horizontal plane H If it collects in the water, the mud, muddy water, water, earth and sand are not easily discharged. As a result, rust is easily generated inside the motor case.
Further, the accumulated mud easily enters a hydraulic device (not shown), which causes a failure.

Other conventional techniques include, for example, a motor case manufactured by casting (see Patent Document 1), a yoke guide formed in a U-shaped cross section (see Patent Document 2), an idler yoke and a yoke guide. There are a configuration in which the gap is made small (Patent Document 3) and an idler guide plate formed from a rolled steel material (Patent Document 4).
However, these conventional techniques do not easily and reliably exclude foreign matters such as mud, muddy water, water, and earth and sand from the region between the idler guide and the idler yoke and / or the motor case.
JP 2003-56005 A JP 2003-237645 A JP 2003-267274 A JP 2002-53085 A

  The present invention has been proposed in view of the above-described prior art, and easily and reliably removes foreign matters such as mud, muddy water, water, and earth and sand from the region between the idler guide and the idler yoke and / or the motor case. An object of the present invention is to provide a foreign matter discharge structure for a crawler type traveling device that can be eliminated.

  The foreign matter discharge structure of the crawler belt type traveling device of the present invention is connected to the center frame (1) by the center frame (1) and the connecting member (3) and is provided on both the left and right sides of the center frame (1). It has a side frame (2) and a crawler belt (8), and the crawler belt (8) is wound around the sprocket (7), the idler (4), and the upper and lower rollers (91, 92). In the foreign matter discharging structure of the crawler belt type traveling device (C), the sliding surface of the idler guide (41ab) supporting the idler yoke (42) coupled to the rotating shaft (4s) of the idler (4) is supported by the idler (4 ) Side is inclined so as to descend (refer to claim 1: see FIGS. 4 to 8).

Here, the idler guide (41au) above the idler yoke (42) and the idler guide (41ab) below may be configured separately (see FIGS. 4 and 5) or integrally. It may be configured (see FIG. 6).
The idler guide may be configured separately from the idler frame (41) that surrounds the idler (41au, 41ab, 41B) (see FIGS. 4 to 6), but is configured integrally (41C) (FIG. 7).

  Further, only the sliding surface located below the idler yoke (42A) may be inclined (see FIGS. 4 to 7), but the upper and lower sliding surfaces of the idler yoke (42B) may be May also be inclined (see claim 2: FIG. 8).

  The foreign matter discharge structure of the crawler belt type traveling device (C) of the present invention is connected to the center frame (1) by the center frame (1) and the connecting member (3), and on both the left and right sides of the center frame (1). It has a side frame (2) and a crawler belt (8), and the crawler belt (8) is wound around a sprocket (7), an idler (4), and upper and lower rollers (91, 92). In the foreign matter discharging structure of the crawler belt type traveling device (C), a plate-like member (motor case lower rim 52Ab˜) that divides the lower side of the motor case (5A to 5C) that houses the motor that drives the sprocket (7). 52Cb) is configured to be inclined so that the side away from the sprocket (7) is lowered (Claim 3: see FIGS. 9 to 12).

  Here, only the plate member (motor case lower rim 52Ab) that defines the lower side of the motor case (5A) may be inclined (see FIG. 9), but the plate shape that defines the upper side of the motor case (5B). The member (motor case upper rim 52Bu) can be configured to be inclined (so that the side separated from the sprocket 7 is lowered) (see claim 4: see FIG. 10).

  Furthermore, the plate-like member (motor case lower rim 52Cb) that defines the lower side of the motor case (5C) is configured to be inclined so that the side separated from the sprocket is lowered. The member (motor case upper rim 52Cu) may be configured to be inclined so that the side away from the sprocket (7) is raised (see FIG. 12).

  In carrying out the present invention, the center frame of the crawler type traveling device includes a side frame (2) connected to the left and right sides via a connection member (3) (of the center frame 1), and the side frame (2). In the center frame (1) of the crawler belt type traveling device (C) having the crawler belt (8) provided, the planar shape is formed in an annular shape, and the outer shape (on the upper end surface of the portion formed in the annular shape) The diameter dimension is set to be equal to or smaller than the outer diameter dimension of the turning wheel (R) (that is, the center frame 1 does not have a portion positioned radially outward of the turning wheel R in the horizontal direction). (FIGS. 1-3, 13-18).

  In carrying out the present invention, the center frame of the crawler type traveling device (C) includes a side frame (2) connected to the left and right sides via a connection member (3) (of the center frame 1), and the side frame. In the center frame (1) of the crawler type traveling device (C) having the crawler belt (8) provided on the frame (2), the planar shape is configured to be a non-circular shape (for example, a polygonal shape or an elliptical shape). The dimension of the non-circular shape is set to be equal to or smaller than the shape inscribed in the outer diameter of the turning wheel (R) (in the horizontal direction, the center frame (1D) is located radially outward of the turning wheel (R)). (It is configured so as not to have a portion) (FIG. 22).

The center frame (1) and one side frame (2) are preferably connected by one or a plurality of (for example, two) connecting members (3) (FIGS. 1 to 3, FIG. 13 to 22).
And as for the cross-sectional shape of the connection member which connects a center frame and a side frame, it is preferable that the upper part has convex shape (arc shape, mountain shape, etc.). In other words, it is preferable that the cross-sectional shape of the connecting member (3) has a required strength and is difficult to place earth and sand on the upper part (FIGS. 13 and 19 to 21). .

  Further, the upper end of the center frame (1A) absorbs discontinuities due to the difference in size and / or shape from the turning wheel (R) and connects the turning wheel (R) to the upper end of the center frame. Flange portions (14A, 14B) are preferably provided (FIGS. 16-18).

  In addition, the damping structure (31, 32) is interposed at the junction between the center frame (1) and the connection member (3E) and / or at the junction between the connection member (3E) and the side frame (2). It is preferable that it is mounted (FIG. 28).

  When the crawler type traveling apparatus of the present invention is implemented, the side frame is connected to the center frame (1) by the center frame (1) and the connecting member (3) and is provided on both the left and right sides of the center frame (1). (2) and a crawler belt (8), and the crawler belt (8) is wound around a sprocket (7), an idler (4), and upper and lower rollers (91, 92). In the traveling device (C), in the region between the idler (4) and / or the sprocket (7) and the side frame (2), a means for suppressing vibration (damping structure: for example, a damping material D such as rubber) It is preferable to interpose the structures 21, 21A, 21B) including (see FIGS. 23 to 33).

  Specifically, the boundary between the side frame (2) and the idler frame (41), the boundary between the side frame (2) and the motor case (5), the side frame (2) and the lower roller (92) Any means for suppressing vibration (damping structure: for example, structures 21, 21 </ b> A, 21 </ b> B including a damping material D such as rubber) may be interposed in any of the boundary portions with the bracket (92 </ b> B).

  Here, the means for suppressing vibration (damping structure: for example, the structures 21B and 32 including the damping material D such as rubber) are provided on the center frame (1) on the damping material (for example, rubber D) provided therein. ) And a structure that supports the load is preferably provided so that the load from the upper structure or the like is not sheared by being loaded (see FIGS. 25, 26, 29, and 31).

  Specifically, when the means for suppressing vibration is configured by sandwiching the damping material (D) between the connection plates (21, 21B), the flange portion (21Bh) is connected to one connection plate (21B). And the flange portion (21Bh) engages with the upper end of the other connection plate (21), so that the load applied to the means for suppressing vibration is connected to the flange portion (21Bh) and the other connection plate (21Bh). The plate (21) is configured to be supported by the upper end portion (see FIG. 26).

  Alternatively, when the means for suppressing vibration is configured by sandwiching the damping material (D) between the connection plates (21A, 21A), the horizontal portion (21Ah) is provided between the damping material (D) and the connection plate (21A). ), And the horizontal portion (21Ah) is configured to support a load applied to the means for suppressing vibration (see FIG. 25).

  Further, a means for suppressing vibration is configured by sealing (or sealing) a damping material (for example, a liquid damping material G such as silicon) inside the integrated member (23) (see FIG. 31). ).

In addition, a structure that suppresses vibration on the sliding surface of the idler yoke (42) coupled to the rotating shaft (4s) of the idler (4) and / or the idler guide (41a) (supporting with the idler yoke 42 interposed therebetween) ( For example, it is preferable to provide a damping material D) such as rubber (see FIG. 32).
In this case, in order to prevent the wear of the structure that suppresses vibration (for example, the damping material D such as rubber), the structure that suppresses the vibration (for example, the structure of the damping material D such as rubber) is the sliding material (43 ) Is preferable (see FIG. 33).

  In addition to this, when the crawler type traveling device (C) of the present invention is implemented, the center frame (1) and the connecting member (3) are connected to the center frame (1) and the left and right sides of the center frame (1). It has a side frame (2) provided on both sides and a crawler belt (8), and the crawler belt (8) spans the sprocket (7), the idler (4) and the upper and lower rollers (91, 92). In the crawler type traveling device (C) wound around the motor case (5) to which the motor (6) for driving the sprocket (7) is attached, a portion of the motor (6) connected to the piping (hydraulic piping and A through hole (motor mounting hole 55) for inserting a connection fitting 61 for connecting the hydraulic joint is formed in a partial region of the peripheral edge of the through hole (55). Notch Preferably, relief 55c) is formed (see FIG. 34).

  And it is preferable that this notch part (relief 55c) is formed in the area | region ((alpha)) separated from the idler of the through-hole (55) peripheral part (refer FIG. 35).

The cutout portion (relief 55c) may be cut out over the entire thickness of the motor case (5), but the side (Fα) where the motor (6) (of the motor case 5) and the pipe are connected. ) May be partly chamfered (55e) to form the notch (see FIGS. 36 and 37).
Alternatively, the step (55f) is formed in the plate thickness direction of the motor case (5), and the side (Fα) where the motor and the pipe (of the motor case 5) are connected is cut out. You may comprise so that the other side of 5) is not notched (refer FIG. 38).

  When the notch (55e) is configured by chamfering part of the side (of the motor case 5) where the motor and the pipe are connected (see FIGS. 36 and 37), and a stepped portion in the thickness direction of the motor case When (55f) is formed and the side where the motor and the pipe are connected (Fα) is notched, but the opposite side (of the motor case) is not notched (FIG. 38). The notch (55e) can be formed in the idler side region in the peripheral portion of the through hole (55).

  In such a case, the cutout portion (55e) is not cut out over the entire plate thickness direction of the motor case (5). Therefore, in the case described above (when chamfered, when a step is formed in the thickness direction of the motor case), it is considered that no stress concentration occurs in the notch.

  When attaching the motor (6) to the motor case (5), the portion provided with the connection fitting (61) of the motor (6) before being connected to the pipe (62) is inserted into the through hole (55) of the motor case. The portion provided with the connection fitting (61) of the motor (6) is connected to the pipe (62) (of the motor case 5) via the notch (55e). If the part where the connection fitting (61) of the motor (6) is provided is located on the side connected to the pipe (62) (of the motor case 5), the connection fitting (61) is idler. (4) It is preferable that the motor (6) is rotated so as to face the side (about half a turn), and the pipe (62) is connected to the motor connection fitting (61).

  According to the present invention having the above-described configuration, the sliding surface of the idler guide (41ab) supporting the idler yoke (42) coupled to the rotation shaft (4s) of the idler (4) is supported by the idler ( 4) If it is configured to be inclined so that the side is lowered (Claim 1: FIGS. 4 to 8), the sliding surface (41Ab, 41Bb, 41Cb) of the idler guide (41ab, 41B, 41C) Even if a foreign object (for example, water, earth and sand) enters the surface, the foreign object is discharged downward (on the ground) from the end of the idler (4) side due to the inclination of the sliding surface.

  Therefore, the deterioration (rust etc.) of the sliding surface due to foreign matter is prevented, and the sliding between the idler guide (41ab, 41B, 41C) and the idler yoke (42A) is kept in a good state, tension adjustment, etc. Maintenance is easy.

  Furthermore, by having an inclination, a so-called “draft angle” can be provided in casting or the like, so that the manufacturing effort is reduced.

  In the present invention, the plate-like member (motor case lower rims 52Ab, 52Bb, 52Cb) that forms the lower side of the motor case (5) that houses the motor (6) that drives the sprocket (7) is used as the sprocket (7). If it is configured to incline so that the side separated from the lower side (Claim 3: FIGS. 9 to 12), even if foreign matter enters the motor case (5A, 5B, 5C), the motor case The plate member (motor case lower rims 52Ab, 52Bb, 52Cb) forming the lower side of (5A, 5B, 5C) is immediately discharged out of the motor case (5A, 5B, 5C) along the inclination.

  Accordingly, the inside of the motor case (5A, 5B, 5C) is hardly deteriorated (for example, rust is generated), and the cause of motor failure due to the presence of foreign matter can be eliminated.

  In the present invention, the center frame (1) of the crawler type traveling device (C) is formed in an annular shape, and the outer diameter dimension of the upper surface of the annular center frame (1) is equal to or smaller than the outer diameter dimension of the turning wheel (R). Or the planar shape of the center frame (1D) is less than or equal to the size of a non-circular shape (for example, a polygonal shape or an elliptical shape) inscribed in the outer diameter of the turning wheel (R) (FIG. 13 In the horizontal direction, there is no portion where the center frame (1, 1D) is located radially outward of the turning wheel (R) (or protrudes). Accordingly, the center frame (1, 1D) does not have a portion that protrudes in the horizontal direction as compared with the upper structure (U) placed on the swivel wheel (R). Is prevented from being placed and remaining.

  Here, if the upper part of the cross-sectional shape of the connecting member (3) connecting the center frame (1) and the side frame (2) has a convex shape such as an arc shape or a mountain shape, the connecting member (3) Sediment will not be placed on top. Even if earth and sand are placed on the connection member (3), the earth and sand are immediately removed from the connection member (3) by vibration when the crawler type traveling device (C) of the present invention travels. It will be.

  Moreover, if a damping structure (31, 32) is interposed at the joint location between the center frame (1) and the connection member (3) and / or the joint location between the connection member and the side frame (2) (see FIG. 28). ), Unpleasant vibration and noise are prevented from being transmitted to the upper structure (U) mounted on the crawler type traveling device (C) of the present invention, and so-called “riding comfort” is improved.

Here, in the present invention, in the region between the idler (4) and / or the sprocket (7) and the side frame (2), means for suppressing vibration (damping structure: for example, a damping material D such as rubber) If structures 21, 21 </ b> A, and 21 </ b> B including the above are interposed (see FIGS. 23 to 33), unpleasant vibration and noise can be suppressed.
As a result of various studies by the inventors, it has been found that the largest sources of vibration and noise are the idler (4) and the sprocket (7). Therefore, if the idler (4), the sprocket (7) and the side frame (2) can be separated vibrationally, the center frame (1) and the upper structure (U) mounted on the center frame (1) Unpleasant vibration and noise will not be transmitted.

  At this time, means for suppressing vibration (damping structure: for example, structures 21A, 21B, 32 including a damping material such as rubber) support the load (load from the center frame (1) and the upper structure). If the structure is provided (see FIG. 25, FIG. 26, FIG. 29), the load from the center frame (1) and the upper structure is directly applied to the damping material (for example, rubber D) having relatively low strength. And the damping material (D) is prevented from being sheared by the load.

  Here, in the present invention, the motor case (5) to which the motor (6) for driving the sprocket (7) is attached is connected to the portion (hydraulic piping 62) connected to the piping (62 (see FIG. 42)) (of the motor 6). A through hole (motor mounting hole 55) for inserting a connection fitting 61 for connecting a hydraulic joint is formed, and a partial region of the peripheral edge of the through hole (55) is formed. If the notch (55c) is formed (see FIG. 34), the connection fitting (61) provided in the motor (6) for connection to the pipe (62) is provided in the through hole (55). By inserting from the opposite side of the motor case (5) through the notch (55c), the connecting fitting (61) or the hydraulic joint can be easily installed at a predetermined position without colliding with the motor case (5). It is possible. Therefore, the work of attaching the motor (6) to the motor casing (5), are very easily and efficiently.

  And if this notch part (55c) is formed in the area | region on the side spaced apart from the idler (4) of the through-hole peripheral part (refer FIG. 34), when the crawler belt (8) is moving, an idler (4 ) Side force acts on the sprocket (7) (and the motor 6), but the notch (55c) is not formed in the region where the force acts on the motor case (5) (region on the idler 4 side). Therefore, it is possible to prevent stress concentration from occurring in the notch (55c) due to the force.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

1-3 has shown the whole structure of the crawler type traveling apparatus C which concerns on embodiment of this invention.
1 to 3, a crawler type traveling device denoted as C as a whole includes a center frame 1, side frames 2 provided on both sides of the center frame 1, the side frame 2 and the center frame. 1 and a connecting member 3 for connecting 1.

The center frame 1 has an annular shape in FIGS. 1 to 3, and a turning wheel R is mounted on the upper surface of the annular center frame 1. Above the turning wheel R, an upper structure (upper part) U as described in the conventional example (FIG. 43) is disposed so as to be rotatable together with the turning wheel R.
Since the outer diameter of the annular center frame 1 is made equal to the turning wheel R (it is not made larger than the turning wheel), earth and sand will not accumulate on the center frame 1.

  In FIG. 3, the connecting member 3 that connects the center frame 1 and the side frames 2 on the left and right side portions has four tubular members whose cross sections are convex as shown in FIGS. 19 to 21. As shown in FIG. 2 (see also FIG. 15), they are arranged in an X shape.

Referring to FIGS. 1 and 2, the side frame 2 has an idler 4 at the front end and a motor case 5 at the rear end.
For example, a hydraulic drive motor 6 is attached to the motor case 5, and the sprocket 7 is rotated by the motor 5.
The idler 4 and the sprocket 7 are engaged with the inner peripheral side of a belt-like and endless crawler belt (crawler) 8, and the crawler 8 is configured to rotate by the rotation of the sprocket 7.

Further, the upper roller 91 is rotated on the inner peripheral surface on the upper side of the crawler 8, and the four lower rollers 92 in the illustrated example are rotated on the inner peripheral surface on the lower side of the crawler 8 while being in contact with the crawler 8. It is configured.
That is, the crawler 8 is configured to be wound around the sprocket 7, the idler 4, and the upper and lower rollers 91 and 92.

  Next, a structure for preparing and reliably discharging foreign matters such as mud, muddy water, water, and earth and sand that have entered between the idler guide and the idler yoke will be described with reference to FIG.

  4 and 5 (partially enlarged view of FIG. 4), the idler guide is composed of upper and lower guides 41au and 41ab, and the upper surface 41Ab of the lower guide 41ab is gently extended toward the center of the idler frame 41. A gradient is formed so as to decrease to That is, the upper surface 41Ab of the lower guide 41ab is inclined.

Here, if the inclination angle is too small, the gradient is the same as the horizontal plane. On the other hand, if the inclination angle is too large, the gap between the idler yoke 42A and the upper and lower guides 41au and 41ab becomes too large. From such a viewpoint, the inclination angle of the gradient formed on the upper surface 41Ab of the lower guide 41ab is preferably 2 ° to 35 ° with respect to the horizontal.
Accordingly, a similar inclination is formed on the lower surface of the idler yoke 42A.

FIG. 6 shows a modified example of the idler guide shown in FIGS. 4 and 5, and an idler guide 41B is provided in which the upper idler guide 41au and the lower idler guide 41ab in FIGS. 4 and 5 are integrated. ing. According to the modification of FIG. 6, there is an advantage that it is easy to provide a mold omission gradient.

  FIG. 7 shows a modified example provided with a guide member 41C in which the upper idler guide 41au and the lower idler guide 41ab of FIGS. ing.

Further, the idler guide can be configured as shown in FIG.
4 to 7, only the sliding surface below the idler guide is inclined, whereas in FIG. 8, the upper and lower sliding surfaces 41 </ b> Da (upper side) between the idler frame 41 </ b> D and the idler guide are provided. , 41Db (lower side) have a slope (inclined). The idler yoke 42B is also inclined at the upper and lower sliding surfaces so as to be inclined in a complementary manner with the sliding surfaces 41Da and 41Db of the idler guide.

  If configured as shown in FIG. 8, in addition to the good drainage of water and mud collected at the sliding portion between the idler yoke 42B and the idler guides 41Da, 41Db, the upper and lower idler guide sliding surfaces 41Da, Since 41Db is inclined and the sliding surface of the idler yoke 42B has a complementary inclination, there is an effect that positioning and centering (centering) are facilitated.

In the illustrated embodiment, by adopting the configuration of FIGS.
(1) Good drainage of water and muddy water, slippage between idler guide and idler yoke is maintained, tension adjustment and maintenance are easy,
(2) Good drainage of water and muddy water, can suppress the generation of rust,
(3) Easy cleaning of accumulated mud,
(4) Manufacturing accuracy can be ensured by making the idler guide integrated.
Has the effect of.

  Next, the motor case 5 (see FIG. 51) enters the inside of the motor case rim 52 through the gap of the cover 54, and discharges foreign matters such as mud, muddy water, water, and earth and sand collected on the horizontal plane H (see FIG. 51). The structure for this will be described with reference to FIG.

As shown in FIG. 9, in the illustrated embodiment, the lower side surface 52Ab of the motor case rim 52A of the motor case 5A is inclined.
Here, if the inclination angle of the lower side surface 52Ab of the motor case rim 52A is too large, the motor case rim 52A interferes with a crawler (not shown). On the other hand, if the inclination angle of the lower side surface 52Ab is too small, the effects (effects of drainage, waste mud, etc. described later) due to the inclination cannot be obtained. Accordingly, the inclination angle of the lower side surface 52Ab of the motor case rim 52A is suitably in the range of 2 ° to 15 °.

  FIG. 10 shows a modification in which not only the lower motor case rim 52Bb of the motor case 5B but also the upper motor case rim 52Bu is inclined. This is intended to remove the sediment deposited on the upper motor case rim 52Bu.

FIG. 12 shows a modified example of the motor case rim different from FIG. In such a modification, as shown in FIG. 12, as the rim 52C of the motor case 5C is separated from the motor 6, the upper rim 52Cu of the motor case is gently inclined upward. On the other hand, the motor case lower rim 52 </ b> Cb is gently inclined downward as the distance from the motor 6 increases.
According to the motor case rim 52C of FIG. 12, the opening area on the cover 54 side is widened, so that the maintainability is improved. Further, the workability of assembling the motor 6 is improved.

  Here, in order to incline the motor case rim, as shown in FIG. 11, the steel plate 521 may be processed (chamfered) so as to have a curved contour.

In the illustrated embodiment, the motor case rim is configured as shown in FIGS.
(1) The drainage of water and muddy water is good and the generation of rust can be suppressed.
(2) Easy to clean the accumulated mud,
(3) Mud accumulation in the motor case can be suppressed, and mud can be prevented from entering the hydraulic equipment during maintenance.
There is an operational effect.

53 and 54 show a conventional center frame 1JA and a connection member 3JA (connecting the center frame and the side frame) in the crawler belt type traveling apparatus.
FIG. 53 shows a structure in which a connecting material 3JA is integrally formed with a center frame 1JA to which the ring 11 is fixed. On the other hand, in the example of FIG. 54, the center frame 1JB has a structure in which the ring 11 of FIG. 53 is omitted.
In addition, as shown by a two-dot chain line in FIG. 54, a center frame having a shape in which a part of the connecting material 3JB is cut out may be formed.

Here, in the structure of the conventional center frame, as shown in FIGS. 55 and 56 (partially enlarged view of FIG. 55), there is a problem that earth and sand M remain or accumulate on the upper surface of the center frame 1J. .
That is, an annular ring 11 similar to that described with reference to FIG. 53 is provided on the upper surface of the center frame 1J, and earth and sand tend to accumulate on the upper surface of the center frame 1J excluding the annular ring 11. On the other hand, since the upper structure U is larger than the ring 11, the accessibility for removing the accumulated sediment is poor.

  In the example shown in FIGS. 53 to 56, the steel plate is cut into a predetermined shape, and the cut steel material is bent or welded, and further includes machining, so that the connecting material 3J is connected to the center frame 1J. The cost for the production up to is increased.

  In the illustrated embodiment, a new center frame is disclosed to address such issues.

FIG. 13 shows the center frame 1 and the connection member 3 (which connects the center frame 1 and the side frame) used in the first embodiment described with reference to FIGS.
Although not shown in FIG. 13, at the connection position of each connection member 3 to the center frame 1, a plurality of ribs are welded so as to contact the center frame 1 and each connection member 3 to reinforce the connection portion. It is also possible to do.

The connection member 3 (connection member for connecting the center frame 1 and the side frame 2) shown in FIG. 1 to FIG. 3 and FIG. 13 is configured by a tubular member, and the tubular member 3 is configured separately at the front and rear. Has been.
On the other hand, the connection member 3A can be configured as shown in FIG. That is, in FIG. 14, the connecting member 3 </ b> A is configured as a box-like body, for example, whose outer periphery is enclosed in a box shape by four plates.

The center frame 1 shown in FIG. 13 will be described below.
In FIG. 15, the center frame 1 has a bottom plate portion 12 welded to an annular portion 11. Here, the bottom plate portion 12 is prevented from protruding in the horizontal direction from the annular portion 11. This is because when the bottom plate 12 protrudes in the horizontal direction, earth and sand are placed on the protruding portion.

  In order to reinforce the center frame 1, a reinforcing member 13 is provided inside an annular portion as indicated by reference numeral 13 in FIG. 15. In place of the reinforcing member 13 or in addition to the reinforcing member 13, a reinforcing rib (not shown) may be provided.

Further, in the center frame, as shown in FIGS. 16 and 17, flange portions 14A (FIG. 16) and 14B for attaching the annular portion 11 of the center frames 1A and 1B, the swivel wheel R and the upper structure U, respectively. (FIG. 17) may be provided.
The flange portions 14A and 14B of the center frames 1A and 1B are provided to facilitate the attachment of the turning wheel R (for example, function as a mounting bracket when the turning wheel R is fastened). Alternatively, it is provided in order to absorb the difference between the outer diameter of the turning wheel R and the outer diameter of the annular portion 11 of the center frames 1A and 1B so that various sizes of turning wheels can be attached.

  As shown in FIG. 18, the center frame 1C may be integrated. When making the integrated shape, the whole may be formed by casting, or the shape steel may be bent (roll forming) to form an annular shape with a flange. In the case of the integrated type 1C, it is preferable to provide an opening 1Ca at the bottom.

As shown in FIGS. 19 to 21, the cross-sectional shapes of connecting members 3B (elliptical cross section), 3C (square circular cross section), and 3D (reverse U-time cross section) that connect the center frame and the side frame are a circular cross section and a square cross section. It is possible to adopt not only a radial cross section but also various cross sectional shapes.
The connecting portion 3A may have a structure in which a steel plate as shown in FIG. 14 is welded. However, it is preferable that the annular shape shown in FIG. 13 or the cross section be elliptical or square as shown in FIGS. It is preferable in terms of mud dropping.
Further, as indicated by reference numeral 3D in FIG. 21 (a), another steel plate 3Db is joined to the steel plate 3Da by welding or the like to the inverted U-shaped steel plate 3Da, and the steel plate 3Db is joined from the end of the steel plate 3Da (FIG. 21 (The left and right direction) may be configured not to protrude. Or you may form the shape of the upper part in the cross section of connecting part 3B, 3C, 3D in a mountain shape, as shown in FIG.21 (b).

A modification of the center frame is shown in FIG. In FIG. 22, the planar shape of the center frame 1 </ b> D is not an annular shape but an octagonal tube shape inscribed in the turning wheel R (indicated by a two-dot chain line in FIG. 22).
However, the planar shape of the center frame 1D is not limited to an octagon, and any shape that is inscribed in the turning wheel R indicated by a two-dot chain line is applicable.
Here, the polygonal shape such as “inscribed in the turning wheel R” is that when there is a portion protruding in the horizontal direction with respect to the turning wheel R, there is a possibility that earth and sand may accumulate on the protruding portion. Of course, the dimension of the octagonal center frame 1D can be made smaller than the shape inscribed in the turning wheel R.

  Although not clearly shown, when connecting the connection member to the polygonal tube shape 1D, the strength of the joint portion between the center frame and the connection portion (the center frame 1D and the side frame 2) is improved. Therefore, it is preferable to increase the step area of the joint. Or it is preferable to form a rib in the junction part.

  Here, there is a demand for reducing or preventing sound and vibration transmitted to the upper structure.

  As shown in FIG. 57, the crawler belt 8 and its driving mechanism are attached to the side frame 2 by welding via the motor case side connecting plate 21, or the idler frame 4 is integrally attached to the side frame 2. It has been. The upper roller 91 and the lower roller 92 are also attached to the side frame 2.

  On the other hand, as shown in FIG. 58, in the crawler belt 8 and the drive mechanism, the motor case 5 and the idler frame 41 are attached to the side frame 2 via the connection plate 21.

As shown in FIG. 59, the conventional idler yoke 42 is supported by the idler guide 41a and the idler yoke 42 in direct contact with each other as indicated by reference numeral “(59-1)”. Here, “(59-1)” is a front view of the inside of the idler frame 41, and “(59-2)” is a side view thereof.
There is a conventional technique in which a groove is cut in the yoke and a guide is inserted into the groove.

In the prior art shown in FIGS. 57 to 59, the vibration caused by the contact between the idler 4, the sprocket 7, the upper and lower rollers 91, 92 and the crawler 8, or the vibration from the road surface or the ground is not attenuated, but is attenuated from the side frame 2 to the center. It is transmitted to the frame 1 and the upper structure U. For this reason, there is a problem that not only the riding comfort is deteriorated but also the noise is increased.
That is, in the prior art shown in FIGS. 57 to 59, vibration and noise of the idler 4, the sprocket 7 and the like are directly transmitted to the side frame 2, so that vibrations unpleasant to the passengers who ride on the upper structure Noise will be generated.

As a result of various studies by the inventors, it has been found that the largest sources of vibration and noise are the idler 4 and the sprocket 7.
Therefore, if the idler 4, the sprocket 7 and the side frame 2 can be separated vibrationally, noise and vibration will not be transmitted to the center frame or the like.
In accordance with such knowledge, the illustrated embodiment has the following structure.

That is, as shown in FIG. 23, the connection plate 21 is welded to the end face of the side frame 2A on the sprocket 7 side. On the other hand, the side frame 2A is cut in the vicinity of the end portion on the idler 4 side, and the connecting plate 21 is welded to both sides (the idler 4 side and the sprocket 7 side) of the cut portion.
On the sprocket 7 side, a damping material D such as rubber is sandwiched between the connection plate 21 of the motor case 5 and the connection plate 21 on the end surface of the side frame 2A on the sprocket 7 side, and the idler In the vicinity of 4, a damping material D such as rubber is sandwiched between the two connection plates 21.

Here, the distance indicated by reference numeral L1 in FIG. 23 (the horizontal distance from the center of the idler 4 to the center of the nearest lower roller 92) and the distance indicated by reference numeral L2 (horizontal direction from the center of the sprocket 7 to the center of the nearest lower roller 92) If the distance) is long, the crawler 8 may bend and be caught.
When the crawler 8 is caught, the braking performance may be deteriorated. In addition, vibration may be increased.

24, on the side frame 2B, the lower roller 92 on the idler 4 side is attached to the idler 4 side with respect to the connection plate 21 and the damping material D, while the lower roller 92 on the sprocket 7 side. Are attached to the motor case 5 side of the connection plate 21 and the damping material D.
Such a configuration reduces the distance between L1 and L2 and eliminates the possibility of crawling the crawler 8.
Further, in the structure of FIG. 24, the damping material D is applied to the region L1 (region from the sprocket center to the nearest lower roller center) and the region L2 (region from the idler center to the nearest lower roller center). It is also effective when it cannot be pinched.

For example, as shown in FIG. 30, when the damping material D is sandwiched by the connection plate 21 and the connection plate is fastened by the bolt 26 (FIG. 30), the load from the center frame 1 and the upper structure U is controlled. The material and the bolt are loaded, and the bolt and the damping material may be cut.
For this reason, a structure is required in which the load from the center frame 1 and the upper structure U is not applied only by the bolts.

25 and 26 illustrate a structure that prevents a shearing force from being applied to the bolt sandwiching the damping material D (the same applies to FIG. 29 described later).
That is, in FIG. 25, the load acting from the vertical direction (from the center frame 1 and the upper structure U) is received via the damping material D by the horizontal portion 21Ah provided on the connection plate 21A of the side frame 2C. Yes.
Further, in FIG. 26, a folded horizontal portion 21Bh is provided at the upper end and / or the lower end of one connection plate 21B of the pair of connection plates 21 and 21B of the side frame 2D, and the gravity acting in the vertical direction is applied to the horizontal portion 21Bh. , It is received via the damping material D.

  FIG. 27 is a modification in which a damping material D is interposed between the lower roller bracket 92B and the side frame 2E in order to separate the center frame 2E from the influence of vibration of the lower roller 92 in addition to the configuration of FIG. An example is shown. In FIG. 27, the vibration of the lower roller 92 is not transmitted to the side frame 2E by the damping material D interposed between the lower roller bracket 92B and the side frame 2E.

  In the illustrated embodiment, as shown in FIG. 28, a damping material D is provided at the boundary portion 31 between the center frame 1 and the connection member 3E and / or the boundary portion 32 between the connection member 3E and the side frame 2. May be. With such a configuration, the vibration generated by the idler 4, the sprocket 7, the roller 92, and the like by the damping material D is not transmitted to the center frame 1 and the upper structure mounted thereon.

  As shown in FIG. 28, one mode of the damping material D interposed when the damping material D is disposed is illustrated in FIG. 29 (XX sectional view of FIG. 28). In FIG. 29, loads from the center frame 1 and the upper structure U are applied to the entire horizontal portion of the damping material D. As a result, even if the horizontal portion of the damping material D is fastened with a bolt (not shown in FIG. 29) extending in the vertical direction, the bolt and damping material D are prevented from being sheared. .

  FIG. 30 shows a state in which the damping material D is sandwiched between the connection plates 21 and fastened by fastening means 26 such as bolts and integrated, but as shown in FIG. 31, the connection plates are integrated by welding or the like. It is good also as a structure which comprises the materialized member 23 and encloses the damping material D in the inside. In other words, vibration may be suppressed by the sealing structure 23.

  In other words, as shown in FIG. 30, if the damping material D is held by being sandwiched between the connection plates 21, welding cannot be performed. However, when the load is received only by the bolt 26, there is a case where the bolt 26 or the damping material D is sheared as described above. Such a situation (a situation where the bolt 26 or the damping material D is sheared) must be avoided.

  As shown in FIG. 31, when the damping material D is enclosed in the integrally formed member 23, there is no need to use a bolt and there is no possibility that the bolt will be sheared. At the same time, it can be used as a damping material by enclosing a highly viscous liquid G such as silicon inside (may be encapsulated after welding).

FIG. 32 is a modified example in which the damping material D is disposed between the idler yoke 42 and the idler guide 41a. It is possible to dispose (adhere) a damping material on one or both (at least one) of the idler yoke 42 and the idler guide 41a.
In FIG. 32, reference numeral 4 s indicates the rotation axis of the idler 4.

Here, in the structure of FIG. 32, the damping material D may be worn. Therefore, in the configuration shown in FIG. 33, the vibration damping material D is further covered with the sliding material 43. For example, the presence of the sliding member 43 made of a steel plate or the like suppresses the vibration damping material D from being worn due to contact with a steel member (idler yoke 42, idler guide 41a).
The structure in which the damping material D is combined with the sliding material 43 can also be configured on at least one of the yoke 42 side and the guide 41a side.

As described above, the idler 4, the sprocket 7, the upper and lower rollers 91, 92 and the crawler belt are provided by interposing the damping material D around the side frames 2A to 2E, the lower roller bracket 92B, the connecting member 3E, and the idler yoke 42. The vibration due to the contact of 8, or the vibration from the road surface or the ground can be attenuated, and the riding comfort is improved.
Similarly, it contributes to noise reduction.

As shown in FIG. 60, the conventional crawler type traveling apparatus is composed of a side frame 2, an idler 4, a sprocket 7, a motor case 5, a crawler 8, and upper and lower rollers 91 and 92.
As shown in FIGS. 61 and 62, a hydraulic motor 6 is attached to the motor case 5, and a hydraulic hose 62 and a sprocket 7 are attached to the hydraulic motor 6.

  The gap between the motor mounting hole 55 of the motor case 5 and the fitting portion (fitting hole) of the hydraulic motor in order to position the hydraulic motor 6 to the motor case 5 and to receive the force from the crawler 8 and the sprocket 7. Is as small as about 0.3 mm or less. In FIG. 62, reference numeral 56 denotes a motor mounting bolt hole.

Here, the motor 6 that drives the sprocket 7 of the conventional crawler type traveling apparatus has the following problems.
(1) When the hydraulic motor 6 is inserted, the hydraulic joint 61 hits the motor mounting hole 55 and the hydraulic joint 61 is damaged.
(2) When the hydraulic motor is inserted and removed, the hydraulic joint 61 may hit the motor mounting hole 55, and insertion and removal may not be possible unless the hydraulic joint is removed.
(3) When the hydraulic motor 6 is inserted into the motor case 5, the hydraulic joint 61 is not easily inserted into the tool and takes time, and the hydraulic joint cannot be sufficiently tightened or loosened with the tool.

  In order to cope with such a problem, in the illustrated embodiment, as shown in FIG. 34, a “notch” 55c or “relief” for avoiding piping (or a joint) is provided in the motor case 5 and the hydraulic motor of the motor base 53. A fitting portion (fitting hole) 55 is formed.

  Here, the hydraulic motor 6 has a force as indicated by an arrow Y1 (see FIG. 35) on the idler side (upper left side in FIGS. 34 and 35) due to the reaction force from the ground, the tension of the crawler 8, and the driving force of the motor 6. Therefore, the “relief” or “notch” 55c is preferably formed in the region α shown in FIG.

The reason why the notch 55c is formed in the region α of the motor base 53 in FIG. 35 will be described next.
That is, in FIG. 60, when the crawler travels, a force in the direction of the arrow Y1 acts on the sprocket by a reaction force from the crawler 8, a reaction force from the ground, or a resultant force of these reaction forces.

Therefore, a force also acts on the motor case 5 in the direction indicated by the arrow Y1 in FIG. When the notch 55c is provided in the arrow Y1 direction, there is a possibility that stress concentration occurs in the notch 55c.
That is, in order to prevent stress concentration due to the force in the direction of the arrow Y1, the notch 55c is provided in the region α specified in FIG.

The notches 55c (notches provided in the motor base 53) shown in FIGS. 34 and 35 can be provided in the entire region of the motor base 53 in the thickness direction.
In addition, as shown in FIGS. 36 and 37 (partially enlarged view of FIG. 36), the hydraulic hose 62 (see FIG. 42) in the hydraulic motor fitting part (fitting hole) 55 of the motor case 5 is located. A cutout 55e may be formed in a so-called “chamfered” shape on the surface Fα side.

  Alternatively, as shown in FIG. 38, the step portion 55f may be formed so that the surface Fα side is cut out excessively, and the region on the surface Fα side cut out excessively may be used as the “cutout”.

Here, the shape shown in FIGS. 36 to 38 is cut into a region other than the region specified in FIG. 35 (a region on which the reaction force from the crawler acts), that is, a region on the idler 4 side. Notches (55e, 55f) may be formed.
Since the motor 6 and the motor case 5 are coupled to each other fairly firmly, the notch does not completely cut out the entire thickness direction of the motor base 53, and the thickness direction of the motor base 53 is as shown in FIGS. If any part remains, stress concentration is unlikely to occur. Therefore, the notches (55e, 55f) can be formed in the area on the idler 4 side.

  Even when the motor mounting bolt hole 56 and the escape portion (cutout portion) 55c are close to each other, there is no problem in strength if the motor base 53 is not completely cut out in the thickness direction.

  As shown in FIG. 37, not only the chamfered shape 55e is formed on the surface Fα side, but also the chamfered shape 55i may be formed not only on the surface Fα side but also on the surface Fβ side as shown in FIG. .

In assembling the motor 6 to the motor case 5, first, as shown in FIG. 40, the motor 61 is inserted into the motor mounting hole 55 with the joint 61 directed in the arrow Y2 direction.
After inserting the motor 6 into the motor mounting hole 55, the motor 6 is rotated by about 180 ° so that the position of the joint 61 is directed from the direction of the arrow Y2 (FIG. 40) to the direction of the arrow Y1 (FIG. 41) (FIG. 41). . Thus, the motor 6 is fitted into the motor case 5.

  At this stage, the motor 6 is attached to the motor case 5 (for example, fastened with a bolt (not shown)), and a hydraulic hose 62 is connected to each joint 61 as shown in FIG.

  By providing the notches 55c, 55e, and 55i as described above, the traveling motor can be easily attached and detached. Further, the hydraulic joint 61 is less likely to be damaged.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

  The footwear type traveling device of the present invention can be applied not only to construction machines but also to all types of devices that travel on a crawler.

Side view of an embodiment of the present invention Plan view of an embodiment of the present invention Front view of an embodiment of the present invention The front view which shows the idler guide, idler yoke, and sliding surface in embodiment FIG. 4 is an enlarged view highlighting the characteristics of the idler guide, idler yoke and sliding surface in FIG. The figure which shows one modification of an idler guide The figure which shows the other modification of an idler guide The figure which shows another modification of an idler guide The front view which shows the motor case rim in embodiment The figure which shows one modification of a motor case rim The figure for demonstrating the manufacturing process of the motor case rim | limb of FIG. 9, FIG. The figure which shows another modification of a motor case rim The perspective view which shows the center frame used by embodiment of this invention The perspective view which shows the 1st modification of the center frame used by embodiment of this invention. 18 is a longitudinal sectional view of the center frame of FIG. Vertical sectional view of the second modification of the center frame FIG. 21 is a longitudinal sectional view for explaining the operation of the main part in the second modification of FIG. Vertical sectional view of the third modification of the center frame Sectional drawing which shows an example of the cross-sectional shape of a connection member. Sectional drawing which shows the other cross-sectional shape of a connection member. Sectional drawing which shows another cross-sectional shape of a connection member. The top view which shows the 4th modification of a center frame Side view showing the structure near the side frame according to the embodiment The side view which shows the 1st modification of the structure of FIG. The side view which shows the 2nd modification of the structure of FIG. The side view which shows the 3rd modification of the structure of FIG. Side view showing a fourth modification of the structure of FIG. The top view which shows one modification of the connection member which concerns on embodiment The perspective view which shows the aspect of the damping material intervention in FIG. The figure which shows 1 aspect of the intervention of a damping material The figure which shows the aspect of the damping material intervention different from FIG. The figure which shows the aspect of the damping material intervention in the idler vicinity. The figure which shows the aspect of damping material intervention different from FIG. 13 in the idler vicinity The figure which shows the structure of the motor fitting part of the motor case in embodiment The figure which shows the area | region which can form a notch in the motor fitting part of the motor case of FIG. Cross-sectional view for explaining notches Partial enlarged view explaining details of the cutout Partial enlarged view showing another aspect of the notch The partially expanded view which shows another aspect of a notch It is a figure which shows the procedure of attaching a motor to a motor case, and shows the initial stage FIG. 40 is a diagram showing a state where the motor is rotated in the next step of the procedure shown in FIG. The figure which is the process after FIG. 41, Comprising: The figure which shows the state which connected the hydraulic piping to the joint Side view showing an example of construction machinery Plan view showing the substructure of a conventional construction machine Side view showing the structure in the vicinity of a conventional side frame Side view showing the structure near the conventional side frame and different from FIG. A perspective view showing a conventional center frame and connecting member FIG. 47 is a perspective view showing a conventional center frame and connecting member different from FIG. Diagram explaining the problems of the prior art As in FIG. 49, a diagram for explaining the problems of the prior art Front view showing the structure near the conventional idler Front view showing a conventional idler guide Side view showing sliding direction of idler guide Partial enlarged view showing details of a conventional idler guide Partial enlarged view showing details of a variation of a conventional idler guide Partial enlarged view showing details of another modification of the conventional idler guide Diagram showing the arrangement of the motor case rim Diagram showing the internal shape of the motor case rim The figure explaining the shape of a conventional motor case rim, and the mode of manufacture The figure for demonstrating the mechanism which drives a crawler belt Front view with motor case attached to sprocket Side view with motor case attached to sprocket

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Center frame 2 ... Side frame 3 ... Connection member 4 ... Idler 5 ... Motor case 6 ... Motor 7 ... Sprocket 8 ... Track / crawler 12 ... Second horizontal bone member 13 ... third horizontal bone member 14 ... flange 21 ... connecting plate 41 ... idler frame 42 ... idler yoke 43 ... sliding material

Claims (4)

  A center frame, a side frame connected to the center frame by a connecting member and provided on both left and right sides of the center frame, and a crawler belt, the crawler belt spanning a sprocket, an idler, and upper and lower rollers In the foreign matter discharging structure of the track-type traveling device that is wound, the sliding surface of the idler guide that supports the idler yoke that is coupled to the idler rotating shaft is inclined so that the idler side is lowered. A foreign matter discharge structure for a crawler type traveling device.   2. The foreign matter discharging structure for a crawler type traveling apparatus according to claim 1, wherein the upper and lower sliding surfaces of the idler yoke are both inclined.   A center frame, a side frame connected to the center frame by a connecting member and provided on both left and right sides of the center frame, and a crawler belt, the crawler belt spanning a sprocket, an idler, and upper and lower rollers In the foreign matter discharging structure of the track-type traveling device that is wound, the plate-like member that defines the lower side of the motor case that houses the motor that drives the sprocket is inclined so that the side separated from the sprocket is lowered. A foreign matter discharging structure for a crawler type traveling device.   4. The foreign matter discharging structure for a crawler type traveling apparatus according to claim 3, wherein a plate-like member defining the upper side of the motor case is inclined.

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