Construction machinery cab and construction machinery

Abstract

In the cab of construction machinery, ensure space in front of the operator's seat. [Solution] The cab 12 comprises a cab body 40, an operator's seat 21, a handle 23 located in front of the operator's seat 21, and an air conditioning unit 25. The air conditioning unit 25 is positioned on one side or the other side of the operator's seat 21 in the width direction so as not to overlap with the operator's seat 21 in the width direction.

Description

Technical Field

[0001] The present disclosure relates to a cab for a construction machine and a construction machine.

Background Art

[0002] Patent Document 1 discloses a steering module.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] By the way, also in the cab of a construction machine, a steering wheel, a steering column, and the like are positioned in front of the operator's seat. In order to accommodate the physiques of various operators, it is desirable to secure sufficient space on the front side of the operator's seat. For example, if the foot space is wide, even a large-sized operator will not feel cramped in the legs, and a small-sized operator can move the seat forward.

[0005] An object of the present disclosure is to secure the space on the front side of the operator's seat in a cab of a construction machine.

Means for Solving the Problem

[0006] A cab for a construction machine according to the present disclosure includes an operator's seat and an air conditioner unit, and the air conditioner unit is disposed on one side or the other side in the width direction of the operator's seat so as not to overlap with the operator's seat in a top view.

Effects of the Invention

[0007] According to the present disclosure, the space on the front side of the operator's seat can be secured. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of the cab from the outside. [Figure 2] This is another perspective view of the cab from the outside. [Figure 3] This is a top-down cross-sectional view showing the inside of the cab. [Figure 4] This is a perspective view showing the wiring inside the cab. [Modes for carrying out the invention]

[0009] Preferred embodiments of this disclosure are described below.

[0010] Figures 1 to 3 show the cab 12 according to this embodiment. The cab 12 is a cab for construction machinery, specifically the cab of an articulated dump truck.

[0011] The cab 12 comprises a cab body 40 that forms its outer shell, an operator's seat 21, a handle 23 located in front of the operator's seat 21, and a steering column 28 on which the handle 23 is mounted.

[0012] The cab body 40 comprises a front wall 41F, a rear wall 41R, a first side wall 41S1, a second side wall 41S2, and a top wall 41T.

[0013] The first side wall 41S1 is located on one side in the width direction relative to the operator's seat 21. The first side wall 41S1 includes an entrance / exit 42 and a door 43 that opens and closes the entrance / exit 42. The door 43 is a front-opening door with a hinge on the rear side, which rotates to open the front side.

[0014] The second side wall 41S2 is located on the other side in the width direction relative to the operator's seat 21. The second side wall 41S2 does not have an entrance or exit.

[0015] The front wall 41F, the rear wall 41R, the first side wall 41S1 and the second side wall 41S2 are each composed of a transparent portion made of a windshield 44F or the like, and a non-transparent portion. The top wall 41T is composed only of a non-transparent portion.

[0016] The operator seat 21 is provided at a position substantially at the center in the width direction inside the cab 12. However, when viewed in more detail, the widthwise center of the operator seat 21 is located at a position closer to the other side in the width direction than the widthwise center of the entire cab 12. The operator seat 21 is configured to be slidable in the front-rear direction.

[0017] The handle 23 is attached to the steering module 24 (see FIG. 4). The steering module 24 includes a tilt mechanism and a telescopic mechanism. Therefore, the handle 23 is configured to be adjustable in angle in the vertical direction and adjustable in position in the front-rear direction.

[0018] The steering column 28 is provided so as to cover the steering module 24 with a column cover.

[0019] FIG. 4 is a perspective view showing wiring arranged inside the cab 12.

[0020] The cab 12 includes a combination switch unit 50 disposed inside the steering column 28, and a switch-side harness 60 led out from the combination switch unit 50. The cab 12 further includes a controller 29 and a controller-side harness 70 led out from the controller 29.

[0021] The combination switch unit 50 is a device that integrates the functions of switches such as turn signals, retarder brakes, wipers, and horns. The combination switch unit 50 includes levers, a board, and the like. The levers protrude from the steering column 28 into the vehicle interior and can be directly operated by the operator. On the other hand, the board and the electronic circuit are accommodated inside the steering column 28.

[0022] The controller-side harness 70 is connected to the switch-side harness 60. As a result, the controller 29 and the combination switch unit 50 are electrically connected.

[0023] The switch-side harness 60 includes a first harness 61 drawn out from the combination switch unit 50 to one side in the width direction, and a second harness 62 drawn out from the combination switch unit 50 to the other side in the width direction. The first harness 61 and the second harness 62 are connected to respective circuit boards provided in the combination switch unit 50. The first harness 61 corresponds to the turn signal, retarder brake, auto retarder brake setting, and shift select setting. The second harness 62 corresponds to the wiper and the horn.

[0024] The controller-side harness 70 includes a main trunk portion 71 connected to the controller 29, a first branch portion 72 branched from the main trunk portion 71 and connected to the first harness 61, and a second branch portion 73 branched from the main trunk portion 71 and connected to the second harness 62.

[0025] Specifically, the plurality of connectors provided at the end of the first branch portion 72 and the plurality of connectors provided at the end of the first harness 61 are connected at the first connection portion 31. The plurality of connectors provided at the end of the second branch portion 73 and the plurality of connectors provided at the end of the second harness 62 are connected at the second connection portion 32. Accordingly, the position where the controller-side harness 70 and the first harness 61 are connected (the position of the first connection portion 31) is on one side in the width direction relative to the center of the steering wheel 23, and the position where the controller-side harness 70 and the second harness 62 are connected (the position of the second connection portion 32) is on the other side in the width direction relative to the center of the steering wheel 23.

[0026] The main trunk portion 71 of the controller-side harness 70 includes a rear extending portion 71A extending toward the other side in the width direction at a position behind the operator seat 21, and a side extending portion 71B extending forward at a position on one side in the width direction of the operator seat 21.

[0027] The lateral extension 71B includes a wall-side portion 71B1 that extends in the longitudinal direction along the second side wall 41S2 on the other side in the width direction of the cab body 40. The main trunk 71 then branches into a first branch portion 72 and a second branch portion 73 at the front end of the wall-side portion 71B1.

[0028] The first branch section 72 includes a widthwise extending section 72A that extends in the width direction near the lower end inside the cab 12, and an upward extending section 72B that extends upward in front of the operator's seat 21.

[0029] A portion of the upper extension 72B extends upward at a position where it overlaps with the lower shaft cover 27 in the width direction.

[0030] The second branch section 73 includes an upwardly extending section 73A that extends upward from a position on one side in the width direction relative to the operator's seat 21, and a widthwise extending section 73B that extends to one side in the width direction at an intermediate vertical position of the cab 12.

[0031] As shown in Figure 3, the cab 12 is equipped with an air conditioning unit 25. The air conditioning unit 25 is positioned on the other side of the operator's seat 21 in the width direction so as not to overlap with the operator's seat 21 in the width direction. The air conditioning unit 25 is adjacent to the second side wall 41S2 and also adjacent to the rear wall 41R.

[0032] On the other hand, the controller 29 is positioned on one side of the operator's seat 21 in the width direction so as not to overlap with the operator's seat 21 in the width direction. The controller 29 is adjacent to the first side wall 41S1 and also adjacent to the rear wall 41R.

[0033] The cab 12 is equipped with an auxiliary seat 22 located on one side in the width direction relative to the operator's seat 21. In other words, the auxiliary seat 22 is located on the side closer to the entrance 42 relative to the operator's seat 21. When viewed from above, at least a portion of the auxiliary seat 22 overlaps with at least a portion of the controller 29.

[0034] As shown in Figure 3, the cab 12 is equipped with a side switch section 26 located on the other side in the width direction of the operator's seat 21. The side switch section 26 has a variety of switches arranged together. The side switch section 26 includes multiple operating parts (switches) such as a shift lever, a hoist lever, and a parking brake switch.

[0035] The controller-side harness 70 also branches to branch sections for multiple operating parts of the side switch section 26. These branch sections for the operating parts are located closer to the controller 29 than the positions where the first branch section 72 and the second branch section 73 branch off.

[0036] <Effects and Effects> Next, the effects and advantages of this embodiment will be described.

[0037] This embodiment relates to a cab 12 of a construction machine, as shown in Figures 1 and 2. As shown in Figures 3 and 4, the cab 12 includes an operator's seat 21, a combination switch unit 50 located in front of the operator's seat 21, and a switch-side harness 60 extending from the combination switch unit 50. By the way, depending on the routing of the switch-side harness 60, the structure around the handle 23 may become larger, which could result in a reduction of the space in front of the operator's seat 21. Therefore, in this embodiment, as shown in Figure 4, the switch-side harness 60 includes a first harness 61 that is drawn out from the combination switch unit 50 to one side in the width direction, and a second harness 62 that is drawn out from the combination switch unit 50 to the other side in the width direction. Therefore, the switch-side harness 60 can be routed separately on the left and right sides within the steering column 28. Consequently, compared to a structure in which, for example, the switch-side harness 60 passes behind the steering shaft (towards the operator's seat 21) (not shown), the structure around the steering column 28 can be made smaller in the front-to-back direction. As a result, space in front of the operator's seat 21 (including the space at the operator's feet) can be secured.

[0038] In this embodiment, the cab 12 is equipped with an air conditioning unit 25. By the way, if the air conditioning unit 25 is positioned behind the operator's seat 21 and overlaps with the operator's seat 21 in the width direction, it becomes necessary to position the operator's seat 21 further forward, which makes it difficult to secure space in front of the operator's seat 21. Therefore, in this embodiment, as shown in Figure 3, the air conditioning unit 25 is positioned on one side or the other side in the width direction of the operator's seat 21 so as not to overlap with the operator's seat 21 when viewed from above. Therefore, the operator's seat 21 can be positioned towards the rear, and as a result, space can be secured in front of the operator's seat 21.

[0039] Furthermore, in this embodiment, as shown in Figure 3, the controller 29 is positioned on one side in the width direction of the operator's seat 21 so as not to overlap with the operator's seat 21 in a top view, and the air conditioning unit 25 is positioned on the other side in the width direction of the operator's seat 21 so as not to overlap with the operator's seat 21 in a top view. Therefore, when the cab 12 is equipped with an air conditioning unit 25 and a controller 29, space can be secured in front of the operator's seat 21.

[0040] Furthermore, in this embodiment, as shown in Figure 3, the cab body 40 has an entrance / exit 42 provided in the first side wall 41S1 located on one side in the width direction relative to the operator's seat 21. In other words, the cab 12 is equipped with a first side wall 41S1 on which the entrance / exit 42 is provided, and the controller 29 is located between the first side wall 41S1 and the operator's seat 21. Therefore, when the air conditioning unit 25 is large in the front-to-back direction, the size of the entrance / exit 42 can be ensured.

[0041] Furthermore, in this embodiment, as shown in Figure 3, at least a portion of the auxiliary seat 22 overlaps with at least a portion of the controller 29 when viewed from above. Therefore, the space directly above the controller 29 can be effectively utilized to place the auxiliary seat 22.

[0042] Furthermore, in this embodiment, as shown in Figure 4, the cab 12 includes a controller-side harness 70 that is drawn out from the controller 29 and connected to the switch-side harness 60, and a handle 23 whose rotating shaft passes through the combination switch unit 50. Here, the position where the controller-side harness 70 and the first harness 61 are connected is on one side in the width direction from the rotation axis of the handle 23, and the position where the controller-side harness 70 and the second harness 62 are connected is on the other side in the width direction from the rotation axis of the handle 23. Therefore, harness connection work is easy. Also, compared to the case where these connection points coincide with the center of the steering wheel 23 in the width direction, it is easier to miniaturize the structure around the steering column 28 in the front-rear direction. Specifically, the connection points between the controller-side harness 70 and the first harness 61, and between the controller-side harness 70 and the second harness 62, are located on the outside in the width direction of the combination switch unit 50, avoiding the front of the steering module 24 and the lower shaft cover 27. This allows the steering module 24 and the lower shaft cover 27 to be brought closer to the front wall 41F. As a result, it is easier to miniaturize the structure around the steering column 28 in the front-rear direction.

[0043] Furthermore, in this embodiment, as shown in Figure 4, the controller-side harness 70 includes a main section 71 connected to the controller 29, a first branch section 72 branching from the main section 71, and a second branch section 73 branching from the main section 71. The first branch section 72 is connected to the first harness 61. The second branch section 73 is connected to the second harness 62.

[0044] Furthermore, in this embodiment, as shown in Figure 4, the main trunk 71 includes a wall-side portion 71B1 that extends in the front-rear direction along the second side wall 41S2 on the other side in the width direction of the cab body 40. The main trunk 71 branches into a first branch portion 72 and a second branch portion 73 at the front end of the wall-side portion 71B1. Therefore, compared to the case where the main trunk 71 branches off at a position close to the lower shaft cover 27, the main trunk 71 can be branched off closer to the controller 29. As a result, the harness can be routed more efficiently.

[0045] Furthermore, in this embodiment, the widthwise center of the operator's seat 21 is located to the other side in the widthwise direction compared to the widthwise center of the entire cab 12. In other words, the center of the operator's seat 21 is offset in the widthwise direction relative to the center of the entire cab 12. Therefore, it is possible to secure space on one side in the width direction of the operator's seat 21.

[0046] While preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to those described above.

[0047] For example, in the above embodiment, the air conditioning unit 25 is positioned on one or the other side of the operator's seat 21 in the width direction so as not to overlap with the operator's seat 21 in the width direction, but the disclosure is not limited thereto.

[0048] <Note> (Additional note 1) Operator's seat and Air conditioning unit and Equipped with, The air conditioning unit is positioned on one or the other side in the width direction of the operator's seat so as not to overlap with the operator's seat when viewed from above. The cab of a construction machine. (Additional note 2) A controller positioned on one side of the operator's seat in the width direction, so as not to overlap with the operator's seat when viewed from above. Equipped with, The air conditioning unit is positioned on the other side in the width direction of the operator's seat. The cab described in Appendix 1. (Additional note 3) First side wall where an entrance / exit is located Equipped with, The controller is located between the first side wall and the operator's seat. The cab described in Appendix 2. (Additional note 4) Auxiliary seat located in front of the aforementioned controller Equipped with, The auxiliary seat, when viewed from above, has at least a portion that overlaps with at least a portion of the controller. The cab described in Appendix 3. (Additional note 5) A combination switch unit located in front of the operator's seat, The switch-side harness is drawn out from the aforementioned combination switch unit, Equipped with, The aforementioned switch-side harness is, A first harness is drawn out from the aforementioned combination switch unit to one side in the width direction, A second harness is drawn out from the aforementioned combination switch unit to the other side in the width direction, including, A cab as specified in any one of the appendices 1 to 4. (Additional note 6) Controller and A controller-side harness is drawn out from the controller and connected to the switch-side harness, A handle is provided such that the axis of rotation passes through the combination switch unit, Equipped with, The position where the controller-side harness and the first harness are connected is on one side in the width direction relative to the rotation axis. The position where the controller-side harness and the first harness are connected is on the other side in the width direction from the rotation axis. The cab described in Appendix 5. (Additional note 7) The aforementioned controller-side harness is, The main unit connected to the controller, A first branch section that branches off from the main trunk and is connected to the first harness, A second branch section that branches off from the main trunk and is connected to the second harness, Equipped with, The cab described in Appendix 6. (Additional note 8) The aforementioned main unit is A wall-side portion extending in the front-rear direction along the second side wall on the other side in the width direction of the cab body. Equipped with, The main trunk branches into the first branch and the second branch at the front end of the section along the wall. The cab described in Appendix 7. (Additional note 9) The widthwise center of the operator's seat is located to the other side in the widthwise direction compared to the widthwise center of the entire cab. A cab as specified in any one of the appendices 1 to 8. (Additional note 10) A construction machine equipped with a cab as described in any one of the appendices 1 to 9. [Explanation of Symbols]

[0049] 12...Cab, 21...Operator's seat, 22...Auxiliary seat, 23...Steering wheel, 25...Air conditioning unit, 28...Steering column, 29...Controller, 31...First connection point (where the controller-side harness and the first harness are connected), 32...Second connection point (where the controller-side harness and the second harness are connected), 40...Cab body, 41S1...First side wall, 41S2...Second side wall, 42...Entrance / exit, 50...Combination switch unit, 60...Switch-side harness, 61...First harness, 62...Second harness, 70...Controller-side harness, 71...Main trunk, 71A...Rear extension, 71B...Lateral extension, 71B1...Wall-side section, 72...First branching point, 73...Second branching point

Claims

1. Operator's seat and Air conditioning unit and Equipped with, The air conditioning unit is positioned on one or the other side in the width direction of the operator's seat so as not to overlap with the operator's seat when viewed from above. The cab of a construction machine.

2. A controller positioned on one side of the operator's seat in the width direction, so as not to overlap with the operator's seat when viewed from above. Equipped with, The air conditioning unit is positioned on the other side in the width direction of the operator's seat. The carburetor according to claim 1.

3. First side wall where an entrance / exit is located Equipped with, The controller is located between the first side wall and the operator's seat. The carburetor according to claim 2.

4. Auxiliary seat located in front of the aforementioned controller Equipped with, The auxiliary seat, when viewed from above, has at least a portion that overlaps with at least a portion of the controller. The carburetor according to claim 3.

5. A combination switch unit located in front of the operator's seat, The switch-side harness is drawn out from the aforementioned combination switch unit, Equipped with, The aforementioned switch-side harness is, A first harness is drawn out from the aforementioned combination switch unit to one side in the width direction, A second harness is drawn out from the aforementioned combination switch unit to the other side in the width direction, including, The carburetor according to claim 1.

6. Controller and A controller-side harness is drawn out from the controller and connected to the switch-side harness, A handle is provided such that the axis of rotation passes through the combination switch unit, Equipped with, The position where the controller-side harness and the first harness are connected is on one side in the width direction relative to the rotation axis. The position where the controller-side harness and the first harness are connected is on the other side in the width direction from the rotation axis. The carburetor according to claim 5.

7. The aforementioned controller-side harness is, The main unit connected to the controller, A first branch section that branches off from the main trunk and is connected to the first harness, A second branch section that branches off from the main trunk and is connected to the second harness, Equipped with, The carburetor according to claim 6.

8. The aforementioned main unit is A wall-side portion extending in the front-rear direction along the second side wall on the other side in the width direction of the cab body. Equipped with, The main trunk branches into the first branch and the second branch at the front end of the section along the wall. The carburetor according to claim 7.

9. The widthwise center of the operator's seat is located to the other side in the widthwise direction compared to the widthwise center of the entire cab. The carburetor according to claim 1.

10. A construction machine comprising the cab described in claim 1.

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