JP6013256B2 - Opening and closing structure - Google Patents

Description

  The present invention relates to an opening / closing structure for an opening.

Conventionally, there is a crawler type traveling device disclosed in Patent Document 1.
This crawler type traveling device has drive wheels provided on one of the front and rear sides of the track frame, an idler provided on the other front and rear of the track frame, and a crawler belt wound around the drive wheels and the idler.
The crawler type traveling device is provided with a grease cylinder type tension device for adjusting the tension of the crawler belt, and this tension device is provided in the track frame.

  In the side wall of the track frame, a grease injection opening is formed for inserting a grease gun for injecting grease into a grease cylinder of the tensioning device. The grease injection opening can be opened and closed freely by an opening / closing cover when not needed. The opening / closing cover includes an engaging piece that enters the inside of the grease injection opening and contacts the inner surface of the side wall of the track frame, and an attachment piece that is fixedly attached to the track frame with a bolt.

JP 2002-188179 A

In the conventional crawler type traveling device, it is necessary to remove the opening / closing cover when injecting grease into the grease cylinder, and it is troublesome to attach / detach the opening / closing cover.
In view of the above problems, an object of the present invention is to provide an opening / closing structure that can open an opening without removing the opening / closing cover.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
The opening / closing structure includes an opening / closing cover for closing the opening formed in the wall portion, and the lower portion of the opening / closing cover is fixed to the wall portion by a mounting bolt so as to be rotatable around the mounting bolt. A stopper is provided on one side of the opening / closing cover in the width direction so as to abut against one end of the opening edge of the opening at the closing position of the opening / closing cover and restrict rotation of the opening / closing cover in the tightening direction. When the stopper is loosened and the opening / closing cover is rotated in the loosening direction of the mounting bolt to open the opening / closing cover, it comes into contact with the other end of the opening edge of the opening and loosens the mounting bolt of the opening / closing cover. The rotation of the direction is restricted.

Further , in the closed position of the opening / closing cover, a position deviated from the center line in the lateral width direction of the opening / closing cover toward the side where the stopper is provided so that the opening / closing cover rotates to the opening side by its own weight when the mounting bolt is loosened. The mounting bolt is provided in the above.
The opening is an opening for injecting grease formed in the wall for injecting grease into the grease cylinder, and the stopper can inject grease into the grease cylinder when the opening / closing cover is opened. It contacts with the said other end side of the opening edge part of the said opening in a position, It is characterized by the above-mentioned .

In addition , a drive wheel provided on one side of the track frame, an idler provided on the other side of the track frame, a crawler belt wound around the drive wheel and the idler, and a crawler belt provided in the track frame. Adopted in a crawler type traveling device having a grease cylinder for adjusting tension and an opening / closing cover for opening and closing a grease injection opening formed on the side wall of the track frame to inject grease into the grease cylinder. Opening and closing structure of the opening,
A lower part of the opening / closing cover is fixedly attached to a track frame by a mounting bolt so as to be rotatable around the mounting bolt. One end side of the opening edge of the grease injection opening at the closing position of the opening / closing cover is attached to the opening / closing cover. Is provided with a stopper that restricts rotation of the opening / closing cover in the tightening direction of the mounting bolt, and this stopper loosens the mounting bolt and rotates the opening / closing cover in the loosening direction of the mounting bolt to open the opening / closing cover. In a position where grease can be injected into the grease cylinder, it is brought into contact with the other end side of the opening edge of the opening for injecting grease, and the rotation of the mounting bolt of the opening / closing cover is restricted.

In addition, an opening / closing cover for opening and closing an opening formed in the wall portion is provided, and a lower portion of the opening / closing cover is attached and fixed to the wall portion by a mounting bolt so as to be rotatable around the mounting bolt. A stopper is provided on one side of the cover in the width direction so as to abut against one end side of the opening edge of the opening at the closed position of the opening / closing cover and restrict rotation in the mounting bolt tightening direction of the opening / closing cover. With the mounting bolts loosened and the open / close cover opened in the mounting bolt loosening direction around the mounting bolts, contact the other end of the opening edge of the opening to rotate the open / close cover in the loosening bolt mounting direction. It is characterized by regulation.

The present invention has the following effects.
Loosening the mounting bolts that attach the opening and closing cover, closing the cover will open the opening by rotating around the mounting bolt, without removing the cover can be opened an opening just loosening the mounting bolts.
In addition, when opening the opening / closing cover by loosening the mounting bolt and rotating the opening / closing cover in the loosening direction of the mounting bolt, the stopper contacts the other end of the opening edge of the opening to restrict the rotation of the opening / closing cover. When the opening is closed with the opening / closing cover, the stopper contacts the one end side of the opening edge to restrict the rotation of the opening / closing cover in the tightening direction of the mounting bolt. As a result, the opening / closing cover can be easily opened and closed.

Also , if the mounting bolts attached to the opening / closing cover are loosened, the opening / closing cover rotates to the open side by its own weight, which is convenient.
In addition , grease can be injected simply by loosening the mounting bolts without removing the cover.
Also , when injecting grease into the grease cylinder, if you loosen the mounting bolt that attaches the opening / closing cover that closes the grease injection opening, the opening / closing cover rotates around the mounting bolt and opens the grease injection opening. Without removing the opening / closing cover, the grease can be injected simply by loosening the mounting bolt.

In addition, when the opening / closing cover is opened by loosening the mounting bolt and rotating the opening / closing cover in the loosening direction, the stopper is placed at the other end of the opening edge of the grease injection opening at a position where grease can be injected into the grease cylinder. The opening and closing cover is restricted by rotating to the side , and the stopper is in contact with one end of the opening edge with the grease injection opening closed by the opening and closing cover, and the rotation of the opening and closing cover mounting bolt is restricted. To do. As a result, the opening / closing cover can be easily opened and closed.

It is a side view of a backhoe. It is a perspective view of a grease injection | pouring site | part. It is front sectional drawing of the left side part of a traveling apparatus. It is side surface sectional drawing of the left side part of a traveling apparatus. The side view of the opening-and-closing cover concerning one embodiment is shown, (a) shows the closed state of the opening for grease injection, and (b) shows the opening state of the opening for grease injection. The side view of the opening / closing cover which concerns on other embodiment is shown, (a) shows the closed state of the opening for grease injection, (b) shows the opening state of the opening for grease injection.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the code | symbol 1 is a backhoe illustrated as a working machine.
The backhoe 1 includes a lower traveling device 2 and a swivel base 3 that is supported by the traveling device 2 so as to be pivotable about a vertical axis.
A cabin 4 and an engine 5 are mounted on the swivel base 3. A driver's seat 6 is provided in the cabin 4.

A working device is provided at the front of the swivel base 3. This working device has a boom 8 and an arm and a bucket (not shown). The base of the boom 8 is pivotally supported by a swing bracket 9 and is driven to swing up and down by a boom cylinder 10. The swing bracket 9 is supported by a support bracket 11 at the front of the swivel base 3 so as to be swingable left and right about an axis in the vertical direction.
The traveling device 2 includes track frames 12 on both the left and right sides, and a crawler traveling device 13 is attached to each of the left and right track frames 12.

The crawler type traveling device 13 includes a drive wheel 14, an idler 15, a plurality of wheel 16, and a crawler belt 17 wound around the drive wheel 14, the idler 15, and the wheel 16.
The driving wheel 14, the idler 15 and the plurality of rolling wheels 16 are supported so as to be rotatable around a lateral axis, and the crawler belt 17 is circulated and rotated in the circumferential direction by driving the driving wheel 14 to rotate.

  The drive wheels 14 are provided on the rear end side of the track frame 12, the idler 15 is provided on the front end side of the track frame 12, and the plurality of rolling wheels 16 are spaced apart in the front-rear direction between the drive wheels 14 and the idler 15. Is provided. As shown in FIG. 4, the idler 15 is rotatably attached to a support frame 18, and the support frame 18 is supported on the front portion of the track frame 12 so as to be movable in the front-rear direction. The driving wheel 14 may be provided on the front end side of the track frame 12 and the idler 15 may be provided on the rear end side of the track frame 12.

As shown in FIG. 3, the track frame 12 has a pair of left and right side walls (wall portions) 19A, 19B and an upper wall 20 that connects the upper ends of the left and right side walls 19A, 19B.
As shown in FIG. 4, a tensioning device 21 that applies tension to the crawler belt 17 is provided in the track frame 12. The tensioning device 21 has a spring 22 and a grease cylinder 23. The spring 22 biases the support frame 18 in a direction in which the idler 15 presses the crawler belt 17. The grease cylinder 23 presses the support frame 18 (idler 15) via the spring 22.

The grease cylinder 23 has a cylinder body 24 and a piston 25, and the piston 25 protrudes when grease is injected into the cylinder body 24. By projecting the piston 25, the idler 15 is pressed against the crawler belt 17, whereby tension is given to the crawler belt 17.
As shown in FIG. 3, a grease nipple 26 for injecting grease is provided on the rear end side of the cylinder body 24. In addition, an opening 27 for injecting grease for injecting grease is formed in the side wall 19A (this is referred to as an outer wall) on the outer side in the left-right direction of the track frame 12. The grease injection opening 27 is formed at a position corresponding to the grease nipple 26, and the tip end side of the nozzle 34 of the grease gun can be inserted.

The grease injection opening 27 is closed by an opening / closing cover 28 so as to be freely opened and closed when not needed.
The opening / closing cover 28 is formed of a plate material, and in the present embodiment, the opening / closing cover 28 is formed in a rectangular shape in a side view that is long in the vertical direction with respect to the horizontal width direction (in the present embodiment, coincides with the front-back direction). . As shown in FIGS. 2 and 3, the lower portion of the opening / closing cover 28 is fixedly attached to the outer wall 19 </ b> A of the track frame 12 by a single mounting bolt 29. The open / close cover 28 includes a flat cover body 30 and a stopper 31.

As shown in FIG. 5, the cover body 30 of the open / close cover 28 includes an upper opening closing portion 30 a that closes the grease injection opening 27 and a lower mounting portion 30 b that is bolted to the outer wall 19 </ b> A of the track frame 12. And overlapped with the outer surface of the outer wall 19 </ b> A of the track frame 12.
The mounting bolt 29 passes through the outer wall 19A of the track frame 12 on the center line 32 in the width direction of the opening / closing cover 28, and is screwed into a nut 33 welded and fixed to the inner side surface of the outer wall 19A. Therefore, the opening / closing cover 28 is fixed by tightening the mounting bolt 29, and the opening / closing cover 28 rotates around the mounting bolt 29 (around the axis of the mounting bolt 29) by loosening the mounting bolt 29. The opening / closing cover 28 opens and closes the grease injection opening 27 by rotating the opening / closing cover 28 around the mounting bolt 29 (around the horizontal axis). Accordingly, the grease injection opening 27 can be opened and closed without removing the opening / closing cover 28, and the grease can be injected simply by loosening the mounting bolt 29.

  FIG. 5A shows a state in which the opening / closing cover 28 closes the grease injection opening 27. At the closed position of the opening / closing cover 28, a stopper 31 is provided on the edge of the cover body 30 on the mounting bolt tightening direction A side above the mounting bolt 29 (one side in the lateral width direction of the opening / closing cover 28). The stopper 31 is formed by bending a part of the plate material forming the opening / closing cover 28 inward in the left-right direction, and is inserted into the grease injection opening 27.

Therefore, when the opening / closing cover 28 is in the closed position, the stopper 31 contacts the opening edge of the grease injection opening 27, so that the rotation of the opening / closing cover 28 in the tightening direction A is restricted. 29 is prevented from being carried around.
FIG. 5B shows a state in which the opening / closing cover 28 has opened (opened) the grease injection opening 27.

At the opening position of the opening / closing cover 28, the stopper 31 contacts the opening edge of the grease injection opening 27, whereby the rotation of the opening / closing cover 28 in the loosening direction B of the mounting bolt is restricted. In this state, the grease nipple 26 In contrast, grease can be injected.
FIG. 6 shows another embodiment of the opening / closing cover 28.
In this embodiment, when the grease injection opening 27 is closed by the opening / closing cover 28, the mounting bolt 29 is attached to the opening / closing cover 28 so that when the mounting bolt 29 is loosened, the opening / closing cover 28 rotates to the open side by its own weight. It is provided at a position deviated from the center line 32 in the width direction toward the stopper 31 formation side.

In this embodiment, when the mounting bolt 29 is loosened while the opening / closing cover 28 is in the closed position, the opening / closing cover 28 rotates to the open side by its own weight, which is convenient.
The stopper 31 is not limited to be formed by bending a part of the plate material constituting the cover main body 30, and the stopper 31 is a plate material made of a member different from the cover main body 30 of the opening / closing cover 28. And may be fixed to the cover body 30 by welding or screws.

  The opening / closing structure for opening / closing the opening 27 by the opening / closing cover 28 is not limited to being adopted in the crawler type traveling device as in the present embodiment, and includes an opening and an opening / closing cover for opening / closing the opening. If it is, it can be adopted.

12 Track frame 14 Driving wheel 15 Idler 16 Rolling wheel 23 Grease cylinder 19A Side wall 27 Opening (opening for grease injection)
28 Opening / Closing Cover 29 Mounting Bolt 31 Stopper 32 Center Line in the Horizontal Width Direction of Grease Injection Opening A Mounting Bolt Tightening Direction B Mounting Bolt Loosening

Claims (5)

An opening / closing cover for freely opening and closing an opening formed in the wall portion is provided, and a lower portion of the opening / closing cover is attached and fixed to the wall portion by a mounting bolt so as to be rotatable around the mounting bolt. A stopper is provided on one side of the lateral width direction so as to abut against one end of the opening edge of the opening at the closed position of the opening / closing cover and restrict rotation of the opening / closing cover in the fastening bolt tightening direction. When the opening / closing cover is opened by rotating the opening / closing cover in the loosening direction of the mounting bolt, the rotation of the opening / closing cover in the loosening direction of the mounting bolt is restricted by contacting the other end of the opening edge of the opening. Opening and closing structure characterized by that.   In the closed position of the opening / closing cover, the opening / closing cover is rotated to the opening side by its own weight when the mounting bolt is loosened, so that the position of the opening / closing cover is biased to the side where the stopper is provided. The opening / closing structure for an opening according to claim 1, further comprising a mounting bolt. The opening is an opening for injecting grease formed in the wall for injecting grease into the grease cylinder, and the stopper is located at a position where the grease can be injected into the grease cylinder when the opening / closing cover is opened. The opening / closing structure of an opening according to claim 1, wherein the opening / closing structure is in contact with the other end of the opening edge of the opening. Drive wheels provided on one side of the track frame, idlers provided on the other side of the track frame, crawler belts wound around the drive wheels and idlers, and tension adjustment of the crawler belts provided in the track frame An opening employed in a crawler-type traveling device including a grease cylinder that performs opening and an opening / closing cover that opens and closes a grease injection opening formed on a side wall of the track frame in order to inject grease into the grease cylinder The opening and closing structure of
A lower part of the opening / closing cover is fixedly attached to a track frame by a mounting bolt so as to be rotatable around the mounting bolt. One end side of the opening edge of the grease injection opening at the closing position of the opening / closing cover is attached to the opening / closing cover. Is provided with a stopper that restricts rotation of the opening / closing cover in the tightening direction of the mounting bolt, and this stopper loosens the mounting bolt and rotates the opening / closing cover in the loosening direction of the mounting bolt to open the opening / closing cover. Opening and closing structure characterized by restricting rotation in the loosening direction of the mounting bolt of the opening and closing cover by contacting the other end of the opening edge of the grease injection opening at a position where grease can be injected into the grease cylinder .   An opening / closing cover for freely opening and closing an opening formed in the wall portion is provided, and a lower portion of the opening / closing cover is attached and fixed to the wall portion by a mounting bolt so as to be rotatable around the mounting bolt. A stopper is provided on one side of the lateral width direction so as to abut against one end of the opening edge of the opening at the closed position of the opening / closing cover and restrict rotation of the opening / closing cover in the fastening bolt tightening direction. In a state where the opening / closing cover is loosened and opened in the direction of loosening of the mounting bolt around the mounting bolt, the rotation of the opening / closing cover in the loosening direction of the mounting bolt is restricted by contacting the other end of the opening edge of the opening. Opening and closing structure characterized by that.

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