JP6864659B2 - Work machine - Google Patents

Description

The present invention relates to a work machine provided with a sheet that can slide in the front-rear direction.

Patent Document 1 describes a hydraulic excavator including a seat pedestal installed on the bottom plate of a driver's cab, a slide rail extending in the front-rear direction on the upper surface of the seat pedestal, and a seat slidable in the front-rear direction by the slide rail. There is. As a result, the position of the seat can be adjusted according to the physique of the operator.

Japanese Unexamined Patent Publication No. 2013-227727

Many types of work machines such as hydraulic excavators are provided, from large to small, depending on the application. However, as the number of dedicated parts for each model increases, the costs of design, manufacturing, and management increase, so that parts are being standardized. A slide mechanism that slides the seat in the front-rear direction is a typical example of parts that can be easily shared.

Here, the space inside the cab is different between the large work machine and the small work machine. Therefore, when an attempt is made to apply a slide mechanism designed for a large cab to a small cab, it becomes necessary to limit the slide amount according to the narrow space of the small cab. However, when an attempt is made to limit the slide amount by attaching additional parts, there arises a problem that the assembly work in a narrow driver's cab is difficult.

The present invention has been made in view of the above-mentioned actual conditions, and an object of the present invention is to provide a work machine in which the slide amount of a sheet is appropriately limited without impairing the assembling property.

In order to achieve the above object, the present invention has a stand fixed to the floor of the driver's cab and integrally formed with a first convex portion protruding laterally, and a second convex portion supported by the stand and rearward. A carrier integrally formed, a sheet supported by the carrier, and a slide mechanism arranged between the stand and the carrier and sliding the carrier and the sheet in the front-rear direction with respect to the stand are provided. When the carrier is positioned at a regulated position within the slide range by the slide mechanism, the first convex portion and the second convex portion abut against each other to restrict the slide of the carrier forward from the regulated position. It is characterized by that.

According to the present invention, the slide amount of the sheet can be appropriately limited without impairing the assembling property. Issues, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

The side view of the hydraulic excavator which is a typical example of the work machine which concerns on this invention. Side view around the seat installed in the driver's cab. An exploded perspective view of the stand, carrier, and slide mechanism. The perspective view which shows the state which the carrier is arranged at the rear end position of a slide range. The perspective view which shows the state which the carrier is arranged in the regulation position.

An embodiment of the work machine according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator 100 which is a typical example of a work machine according to the present invention. Unless otherwise specified, the front, rear, left and right sides in the present specification are based on the viewpoint of the operator who operates the hydraulic excavator 100. Further, the specific example of the work machine is not limited to the hydraulic excavator 100, and may be a dump truck, a motor grader, a wheel loader, or the like.

As shown in FIG. 1, the hydraulic excavator 100 includes a traveling body 101, a swivel body 102 provided on the traveling body 101 so as to be swivel via a swivel frame 102A, and a front work mounted in front of the swivel body 102. The machine 103 and the driver's cab 104 supported at substantially the center of the swivel body 102 are mainly provided.

The traveling body 101 includes a pair of left and right endless running tracks 101A, each of which extends in the front-rear direction. The driving force of the engine (not shown) is transmitted to the endless running track 101A through the hydraulic motor (not shown), so that the traveling body 101 travels. Although the crawler type hydraulic excavator 100 is shown in FIG. 1, it may be a wheeled type.

The swivel body 102 is supported so as to be swivelable with respect to the traveling body 101 while supporting the front working machine 103 and the driver's cab 104. The swivel body 102 is swiveled by driving a swivel motor (not shown) by the engine. The hydraulic excavator 100 shown in FIG. 1 is a so-called "small swivel machine". The small swivel is a swivel body in a range surrounded by the front end, the rear end, and both outer ends of the pair of left and right endless track 101A regardless of the swivel angle of the swivel body 102 when the hydraulic excavator 100 is viewed in a plan view. Refers to a model in which 102 fits. However, the work machine to which the present invention can be applied is not limited to the small swivel machine.

The front work machine 103 includes a boom 103A oscillatingly supported by the swivel body 102, an arm 103B swingably supported by the tip of the boom 103A, and a bucket 103C swingably supported by the tip of the arm 103B. And include. The front working machine 103 operates by supplying hydraulic oil from a hydraulic pump (not shown) to the boom cylinder 103D, the arm cylinder 103E, and the bucket cylinder 103F.

The driver's cab 104 has an internal space on which an operator who operates the hydraulic excavator 100 is boarded. An entrance (opening) 104A for an operator to get in and out of the driver's cab 104 is formed on the left side surface of the driver's cab 104. Although FIG. 1 shows an open type cab 104 in which the doorway 104A is always open, it may be a closed type cab in which the doorway can be opened and closed by a door.

In the internal space of the driver's cab 104, the traveling body 101 is driven, the swivel body 102 is swiveled, the operator's operation for operating the front work machine 103 is received, and the signal corresponding to the received operation is input to the controller (illustrated). Operation devices (steering, pedals, levers, switches, etc.) that output to (omitted) are arranged. That is, the hydraulic excavator 100 operates when the operator in the driver's cab 104 operates the operating device.

Next, with reference to FIG. 2, the components installed in the internal space of the driver's cab 104 will be described. FIG. 2 is a side view of the periphery of the seat 10 installed in the driver's cab 104. In the driver's cab 104, a seat 10 on which the operator sits, an air conditioner 11 arranged behind the seat 10, a stand 20, a carrier 30, and a suspension 40 that support the seat 10 are mainly arranged.

The seat 10 is arranged so that the operator can sit facing forward. Further, in order to adjust the distance of the seat 10 from the operating device (not shown) arranged in front of the seat 10, the stand 20, the carrier 30, and the slide mechanisms 50A and 50B (see FIG. 3) are used to adjust the seat 10 of the driver's cab 104. It is slidably supported in the front-rear direction with respect to the floor 104B. The air conditioner 11 is fixed to the floor 104B behind the seat 10. The air conditioner 11 is an air conditioner that generates air having a predetermined temperature and discharges it into the operating cab 104.

Next, the details of the stand 20, the carrier 30, and the slide mechanisms 50A and 50B will be described with reference to FIGS. 3 to 5. FIG. 3 is an exploded perspective view of the stand 20, the carrier 30, and the slide mechanisms 50A and 50B. FIG. 4 is a perspective view showing a state in which the carrier 30 is arranged at the rear end position of the slide range. FIG. 5 is a perspective view showing a state in which the carrier 30 is arranged at a restricted position within the slide range.

The stand 20 has a top wall 21 extending substantially parallel to the floor 104B of the driver's cab 104, a front wall 22 protruding downward from the front end of the top wall 21, and a front wall 22 protruding downward from the left rear end of the top wall 21. It mainly includes a left rear wall 23 and a right rear wall 24 protruding downward from the right rear end of the top wall 21. On the other hand, the left side surface and the right side surface of the stand 20 are not provided with standing walls that intersect with the top wall 21.

The front wall 22, the left rear wall 23, and the right rear wall 24 are vertical walls extending in a direction intersecting the extending direction of the top wall 21. The front wall 22, the left rear wall 23, and the right rear wall 24 function as ribs that increase the strength of the stand 20, and also function as fixing portions for fixing to the floor 104B by bolts (not shown) or the like. As a result, the stand 20 is held at a position separated upward from the floor 104B.

Further, the stand 20 has a first convex portion 25. The first convex portion 25 is formed by extending a part of the right end surface of the top wall 21 to the right. The first convex portion 25 is parallel to the top wall 21 and flush with the top wall 21. The first convex portion 25 is provided slightly behind the center of the stand 20 in the front-rear direction. However, the specific position of the first convex portion 25 is not limited to the example of FIG.

The stand 20 is formed by, for example, bending a flat plate. More specifically, the flat plate is punched to obtain a flat plate having a shape including a portion corresponding to each of the top wall 21, the front wall 22, the left rear wall 23, the right rear wall 24, and the first convex portion 25. Next, the portions corresponding to the front wall 22, the left rear wall 23, and the right rear wall 24 are bent to obtain the shape shown in FIG. On the other hand, an independent bending step is not required to form the first convex portion 25. That is, in the manufacturing process of the stand 20, the shape of the die at the time of punching differs only between the case where the first convex portion 25 is formed and the case where the first convex portion 25 is not formed.

As described above, the top wall 21, the front wall 22, the left rear wall 23, the right rear wall 24, and the first convex portion 25 constituting the stand 20 are integrally formed. However, it is sufficient that at least the top wall 21 and the first convex portion 25 are integrally formed, and other separate parts may be assembled to the stand 20 after the fact.

The carrier 30 is supported by the stand 20 via slide mechanisms 50A and 50B. The carrier 30 includes a top wall 31 extending substantially parallel to the floor 104B of the driver's cab 104, a front wall 32 protruding downward from the front end of the top wall 31, and a left wall protruding downward from the left end of the top wall 31. 33 and a right wall 34 projecting downward from the right end of the top wall 31 are mainly provided.

The front wall 32, the left wall 33, and the right wall 34 are vertical walls extending in a direction intersecting the extending direction of the top wall 31. Further, the front wall 32, the left wall 33, and the right wall 34 extend over substantially the entire end surface of the top wall 31. The front wall 32, the left wall 33, and the right wall 34 function as ribs that increase the strength of the carrier 30.

Further, the carrier 30 has a second convex portion 35. The second convex portion 35 is formed by extending a part of the lower end of the right wall 34 downward. The second convex portion 35 is parallel to the right wall 34 and flush with the right wall 34. The second convex portion 35 is provided at the rear end of the carrier 30 in the front-rear direction. However, the specific position of the second convex portion 35 is not limited to the example of FIG.

The carrier 30 is formed by, for example, bending a flat plate. More specifically, the flat plate is punched to obtain a flat plate having a shape including a portion corresponding to each of the top wall 31, the front wall 32, the left wall 33, the right wall 34, and the second convex portion 35. Next, the portions corresponding to the front wall 32, the left wall 33, and the right wall 34 are bent to obtain the shape shown in FIG. On the other hand, since the second convex portion 35 is formed when the right wall 34 is bent and formed, an independent bending step is not required to form the second convex portion 35. That is, in the manufacturing process of the carrier 30, the shape of the die at the time of punching differs only between the case where the second convex portion 35 is formed and the case where the second convex portion 35 is not formed.

As described above, the top wall 31, the front wall 32, the left wall 33, the right wall 34, and the second convex portion 35 constituting the carrier 30 are integrally formed. However, it is sufficient that at least the right wall 34 and the second convex portion 35 are integrally formed, and other separate parts may be assembled to the carrier 30 after the fact.

The slide mechanisms 50A and 50B are arranged between the stand 20 and the carrier 30, and support the seat 10, the carrier 30, and the suspension 40 so as to be slidable in the front-rear direction with respect to the stand 20. The slide mechanism 50A is provided at the left ends of the top walls 21 and 31, and the slide mechanism 50B is provided at the right ends of the top walls 21 and 31.

The slide mechanisms 50A and 50B include lower guides 51A and 51B fixed to the upper surface of the top wall 21 and extending in the front-rear direction, upper guides 52A and 52B fixed to the lower surface of the top wall 31 and extending in the front-rear direction, the stand 20 and Spacers 53A and 53B for adjusting the vertical spacing of the carrier 30 are provided. The upper guides 52A and 52B are in contact with the lower guides 51A and 51B so as to be movable in the front-rear direction.

Further, the slide mechanism 50B includes a lever 54B that can be operated between a lock position for locking the slides of the upper guides 52A and 52B with respect to the lower guides 51A and 51B and an unlock position for releasing the lock. When the lever 54B is in the locked position, the slide of the upper guides 52A and 52B with respect to the lower guides 51A and 51B is restricted. Further, when the lever 54B is operated from the locked position to the unlocked position, the lock is released and the seat 10, the carrier 30, and the suspension 40 can slide in the front-rear direction with respect to the stand 20. Further, when the hand is released from the lever 54B, the lever 54B returns to the locked position.

The suspension 40 absorbs the vibration generated by the hydraulic excavator 100 and reduces the vibration transmitted to the seat 10. The specific configuration of the suspension 40 is not particularly limited, but is composed of, for example, anti-vibration rubber, springs, dampers, or a combination thereof.

When the seat 10, the stand 20, the carrier 30, the suspension 40, and the slide mechanisms 50A and 50B are assembled, the stand 20, the carrier 30, and the suspension 40 are vertically laminated below the seat 10, as shown in FIG. To. Further, as shown in FIGS. 4 and 5, the first convex portion 25 and the second convex portion 35 are arranged on the right side of the stand 20 and the carrier 30, that is, on the side opposite to the entrance / exit 104A with the sheet 10 interposed therebetween.

When the stand 20, the carrier 30, and the slide mechanisms 50A and 50B are assembled, the first convex portion 25 is located below the lower end of the right wall 34 and above the lower end of the second convex portion 35. In other words, the second convex portion 35 projects downward from the first convex portion 25. The second convex portion 35 is to the right of the right side surface of the top wall 21 and to the left (base end side) of the protruding end (right end) of the first convex portion 25. That is, the first convex portion 25 is arranged on the path of the second convex portion 35 when the carrier 30 is moved in the front-rear direction.

Next, with reference to FIGS. 4 and 5, the positional relationship between the first convex portion 25 and the second convex portion 35 when the carrier 30 slides with respect to the stand 20 will be described. 4 and 5 show a range in which the slide mechanisms 50A and 50B can slide the carrier 30 as a slide range. This slide range is a range in which the carrier 30 can be slid as a function (performance) of the slide mechanisms 50A and 50B, and is determined by the lengths of the lower guides 51A and 51B and the upper guides 52A and 52B.

That is, the carrier 30 shown in FIG. 4 is arranged at the rear end position of the slide range. In other words, the carrier 30 is restricted from moving backward from the position shown in FIG. 4 by the slide mechanisms 50A and 50B. Then, the seat 10, the stand 20, the carrier 30, the suspension 40, and the slide mechanisms 50A and 50B are installed in the driver's cab 104 so that the seat 10 and the air conditioner 11 do not come into contact with each other at the position of the carrier 30 shown in FIG. To.

At this time, the first convex portion 25 and the second convex portion 35 are separated in the front-rear direction. More specifically, the second convex portion 35 is located behind the first convex portion 25. That is, when the carrier 30 is arranged at the rear end position of the slide range, the first convex portion 25 and the second convex portion 35 do not restrict the slide of the carrier 30.

Next, when the lever 54B is moved to the unlocked position and the seat 10 is slid forward, the carrier 30 slides forward together with the seat 10 and the second convex portion 35 approaches the first convex portion 25. Then, as shown in FIG. 5, when the carrier 30 reaches the regulated position, the front end of the second convex portion 35 comes into contact with the rear end of the first convex portion 25. That is, the slide of the carrier 30 forward from the regulated position is restricted by the first convex portion 25 and the second convex portion 35 that come into contact with each other.

As shown in FIGS. 4 and 5, the regulated position is located within the slide range. More specifically, the restricted position is the position between the front end position and the rear end position of the slide range. That is, without the first convex portion 25 and the second convex portion 35, the carrier 30 can be slid to the front end position in front of the regulated position by the slide mechanisms 50A and 50B. In other words, the first convex portion 25 and the second convex portion 35 limit the range in which the carrier 30 can slide to a part of the slide range by the slide mechanisms 50A and 50B.

In addition, in FIG. 4 and FIG. 5, the slide range and the restricted position are illustrated with reference to the position of the rear end of the carrier 30. However, the method of showing the slide range and the restricted position is not limited to the examples of FIGS. 4 and 5.

According to the above embodiment, for example, the following effects are exhibited.

As in the above embodiment, the first convex portion 25 integrally formed with the stand 20 and the second convex portion 35 integrally formed with the carrier 30 are brought into contact with each other to reduce the amount of slide of the carrier 30 with respect to the stand 20. By regulating, the slide amount of the sheet 10 can be appropriately limited without impairing the assembling property.

More specifically, the seat 10, the suspension 40, and the slide mechanisms 50A and 50B can be commonly used in the small hydraulic excavator 100 and the hydraulic pump larger than the hydraulic excavator 100. On the other hand, the stand 20 and the carrier 30 are for a small hydraulic excavator 100, and for a large hydraulic pump, a stand and a carrier having the same shape are prepared except that the first convex portion 25 and the second convex portion 35 are not provided. Just do it.

As a result, most of the seat 10, the stand 20, the carrier 30, the suspension 40, and the slide mechanisms 50A and 50B can be shared between the small hydraulic excavator 100 and the large hydraulic excavator, and they are assembled by the same procedure. Can be done. Further, by facilitating a plurality of sets of stands 20 and carriers 30 in which the positions of the first convex portion 25 and the second convex portion 35 are different, it is possible to correspond to the cab 104 of various sizes.

Further, according to the above embodiment, a part of the top wall 21 is extended to form the first convex portion 25, and a part of the right wall 34 is extended to form the second convex portion 35. As a result, only by preparing a die corresponding to the presence or absence of the first convex portion 25 and the second convex portion 35, an independent step for forming the first convex portion 25 and the second convex portion 35 becomes unnecessary. As a result, the slide amount of the sheet 10 can be appropriately limited without complicating the manufacturing process.

Further, according to the above embodiment, the entrance / exit 104A is provided on the left side of the sheet 10 (one side in the width direction), and the first convex portion 25 and the second convex portion 35 are provided on the right side of the sheet 10 (the other side in the width direction). It was provided in. As a result, the first convex portion 25 and the second convex portion 35 are less likely to be noticeable and obstructive to the operator boarding the driver's cab 104 through the doorway 104A.

In the above embodiment, an example in which the slide of the carrier 30 forward from the regulated position is restricted by the first convex portion 25 and the second convex portion 35 has been described, but the slide of the carrier 30 behind the regulated position has been described. May be regulated. Further, two sets of the first convex portion 25 and the second convex portion 35 are provided to regulate both the slide of the carrier 30 forward from the first regulation position and the slide of the carrier 30 rearward from the second regulation position. You may. The first regulated position and the second regulated position are both within the slide range, and the second regulated position is a position behind the first regulated position.

The above-described embodiments are examples for the purpose of explaining the present invention, and the scope of the present invention is not limited to those embodiments. One of ordinary skill in the art can practice the present invention in various other aspects without departing from the gist of the present invention.

10 Seat 11 Air conditioner 20 Stand 21 Top wall 22 Front wall 23 Left rear wall 24 Right rear wall 25 First convex part 30 Carrier 31 Top wall 32 Front wall 33 Left wall 34 Right wall 35 Second convex part 40 Suspension 50A, 50B Slide mechanism 51A, 51B Lower guide 52A, 52B Upper guide 53A, 53B Spacer 54B Lever 100 Hydraulic excavator (working machine)
101 Running body 101A Infinite running track 102 Swing body 102A Swing frame 103 Front work machine 103A Boom 103B Arm 103C Bucket 103D Boom cylinder 103E Arm cylinder 103F Bucket cylinder 104 Driver's cab 104A Doorway 104B Floor

Claims (3)

A stand that is fixed to the floor in the driver's cab and has a first convex part that protrudes sideways.
A carrier supported by the stand and having a second convex portion integrally formed at the rear portion,
The sheet supported by the carrier and
A slide mechanism that is arranged between the stand and the carrier and slides the carrier and the seat in the front-rear direction with respect to the stand is provided.
When the carrier is positioned at a restricted position within the slide range by the slide mechanism, the first convex portion and the second convex portion abut against each other to restrict the slide of the carrier forward from the restricted position. A work machine characterized by that. In the work machine according to claim 1,
The first convex portion is formed so as to be flush with the top wall of the stand, which is formed by bending a flat plate, and a part of the top wall is extended laterally.
The second convex portion is a work machine formed by bending a flat plate so as to be flush with the standing wall of the carrier and extending a part of the standing wall downward. In the work machine according to claim 2.
The driver's cab has an entrance on one side in the width direction.
A work machine characterized in that the first convex portion and the second convex portion are arranged on the side opposite to the entrance / exit with the sheet interposed therebetween.

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