Construction Machinery

Abstract

To provide a construction machine for facilitating maintenance by reducing weight of a cover covering components of a machine room of the construction machine.SOLUTION: A construction machine includes: a super structure 3; an engine 11 placed on the super structure 3 and having a cooling fan 17; a radiator 12 placed adjacent to the cooling fan 17; a bonnet 14 openably / closeably covering at least the engine 11; a radiator cover 15 arranged independently from the bonnet 14 and attachably / detachably or openably / closeably covering an upper side of the radiator 12; a partition member 20 arranged between a rear face of the radiator cover 15 and an upper face of the radiator 12 to partition an upstream side of a cooling fan 17 side of the radiator 12 from a downstream side of an opposite side to the cooling fan 17; and an insect proof net 21 covering a sucking side of the radiator 12 in an upstream side further than the partition member 20 to prevent entry of foreign matters. A net cover 22 is openably / closeably placed on the radiator cover 15 to cover an opening 15a for net removal allowing the insect proof net 21 to be attached / detached.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a construction machine having a foreign object intrusion prevention net covering a heat exchanger. [Background technology]

[0002] Conventionally, there is known a construction machine in which the engine cover is divided into an engine upper cover that is positioned above the engine and can be opened and closed with the counterweight side as a pivot point and the machine room side as a free end, and a heat exchanger upper cover that is positioned adjacent to the engine upper cover above the heat exchanger and can be opened and closed with the side panel side as a pivot point and the machine room side as a free end, and in which the free end of the engine upper cover is arranged above the free end of the heat exchanger upper cover when the engine upper cover and the heat exchanger upper cover are closed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-69964 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the construction machinery of Patent Document 1 mentioned above, although the upper heat exchanger cover can be divided to reduce weight, when the upper heat exchanger cover becomes large due to the arrangement of the equipment, there is a problem that the weight is heavy and opening and closing the cover during maintenance becomes difficult.

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make a cover for covering parts in a machine room lighter and easier to maintain. [Means for solving the problem]

[0006] In order to achieve the above object, in the present invention, a net cover is provided separately for inspecting the foreign object intrusion prevention net covering the intake side of the heat exchanger.

[0007] Specifically, the construction machine of the first invention comprises a machine body, an engine mounted on the machine body and having a cooling fan; a heat exchanger provided adjacent to the cooling fan; a bonnet that covers at least the engine in an openable and closable manner; A heat exchanger cover that is provided independently of the bonnet and covers an upper side of the heat exchanger in a detachable or openable manner; a partition member provided between a rear surface of the heat exchanger cover and an upper surface of the heat exchanger, the partition member separating the downstream side of the heat exchanger, which is the cooling fan side, from an upstream side of the heat exchanger, which is opposite to the cooling fan; a foreign object intrusion prevention net that covers the suction side of the heat exchanger upstream of the partition member to prevent the intrusion of foreign objects, The heat exchanger cover is provided with a net cover which opens and closes an opening for attaching and detaching the net, which enables the foreign matter intrusion prevention net to be attached and detached.

[0008] According to the above configuration, the heat exchanger cover that covers the upper side of the heat exchanger is independent of the bonnet, so the bonnet does not become too large and can be opened and closed easily. In addition, the heat exchanger cover itself needs to be opened, closed, and removed when repairing the heat exchanger body, but the frequency of such repairs is limited. Therefore, the net cover, which requires frequent maintenance to prevent clogging, can be opened and closed while the heat exchanger cover is fixed, making it extremely easy to maintain the foreign object intrusion prevention net.

[0009] In the second invention, in the first invention, The net attachment / detachment opening is provided over the upper surface and the side surface of the corner portion of the heat exchanger cover, With the net cover open, Foreign object intrusion prevention net At least the upper side is exposed.

[0010] According to the above-mentioned configuration, when the net cover is opened, the opening for attaching and detaching the net provided at the corner of the heat exchanger cover is exposed, so that the foreign matter intrusion prevention net is easy to see and can be easily attached and detached.

[0011] In a third aspect of the present invention, in the first or second aspect of the present invention, The foreign object intrusion prevention net is provided within the area of ​​the net attachment / detachment opening in a plan view.

[0012] According to the above configuration, the foreign object intrusion prevention net can be easily attached and detached from above with the net cover open.

[0013] In a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, The heat exchanger cover covers at least the upper side of the heat exchanger, and is detachably fixed by fastening members to a top plate covering a machine chamber of the machine body.

[0014] According to the above configuration, although the heat exchanger cover itself needs to be opened, closed, and removed when repairing the heat exchanger body, the frequency of this is limited. Therefore, even when opening the net cover to attach or remove the foreign object intrusion prevention net, the upstream and downstream sides of the heat exchanger are maintained separated by the partition member provided between the back surface of the heat exchanger cover and the top surface of the heat exchanger, and the partition member is less likely to be damaged.

[0015] In a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, A pressurized tank cover that opens and closes a pressurized tank provided above the heat exchanger on the downstream side of the partition member is provided on the heat exchanger cover independently of the net cover.

[0016] According to the above-mentioned configuration, the heat exchanger cover itself does not need to be removed even when refilling the pressurized tank with refrigerant, making it easy to maintain the pressurized tank. In addition, since the pressurized tank cover is provided separately from the net cover, each cover is lightweight. Effect of the Invention

[0017] As described above, according to the present invention, the heat exchanger cover is provided with a net cover that can be opened and closed to cover the net attachment / detachment opening, which enables the attachment and detachment of the foreign object intrusion prevention net, thereby making it possible to reduce the weight of the cover that covers the components in the machine room and making maintenance easier. [Brief description of the drawings]

[0018] [Figure 1] 3 is an enlarged perspective view showing a radiator cover and surrounding covers in a state where the covers are open in the construction machine according to the embodiment of the present invention. FIG. [Diagram 2] 2 is an enlarged perspective view showing a radiator cover and surrounding covers in a state where the covers are closed in the construction machine according to the embodiment of the present invention. FIG. [Diagram 3] FIG. 2 is a cross-sectional view showing the rear side of an upper rotating body of the hydraulic excavator according to the embodiment. [Figure 4] FIG. 1 is a side view showing an overview of a hydraulic excavator. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] 1 to 4 show a hydraulic excavator 1 as a construction machine according to an embodiment of the present invention. As shown in Fig. 4, the hydraulic excavator 1 includes a lower traveling body 2 having crawlers 2a, an upper rotating body 3 as a machine body which is rotatably connected to the lower traveling body 2 via a slewing bearing 5, an attachment 4 which is connected to the front side of the upper rotating body 3 so as to be capable of being raised and lowered, and a counterweight 6 which is placed on the rear of the upper rotating body. For example, although not shown, the lower traveling body 2 may have wheels instead of the crawlers 2a, and the attachment 4 is not particularly limited to a bucket, a crusher, or the like.

[0021] 3, an engine 11 that is long in one direction is mounted on the upper rotating body 3, and a radiator 12 serving as a heat exchanger is mounted adjacent to a cooling fan 17 on one side in the longitudinal direction of the engine 11. In this embodiment, an upper portion of the radiator 12 protrudes beyond an upper plate 10a of a machine room cover 10 that covers a machine room in which the engine 11 and the like are arranged.

[0022] 1, at least the upper part of the engine 11 is covered by a bonnet 14 which can be opened and closed. The bonnet 14 can swing about a bonnet hinge portion 14a and can be opened by unlocking a bonnet locking member 14b and inserting a hand into a bonnet opener 14c. The bonnet 14 can be held in an open state by a bonnet support rod 14d.

[0023] A box-shaped radiator cover 15 with at least a part of the top surface and the bottom surface open is provided independent of the bonnet 14, and the upper side of the radiator 12 is detachably covered by this radiator cover 15. This radiator cover 15 covers at least the upper side of the radiator 12, and its lower end is detachably fixed by fastening members (not shown) such as bolts to a top plate 10a that covers the machine room of the upper rotating body 3. The top plate 10a may be made of multiple steel plates or the like, and is provided with appropriate ventilation holes or the like.

[0024] As shown in Fig. 3, a partition member 20 (shown by a dashed line in Fig. 1) is provided between the back surface (lower surface) of radiator cover 15 and the top surface of radiator 12. This partition member 20 is made of, for example, foamed rubber, and serves to separate the downstream side (the cooling fan 17 side) and the upstream side (the opposite side to cooling fan 17) of radiator 12. Partition member 20 may be adhered to the back surface of radiator cover 15 or to the top surface of radiator 12, and the material is not limited to foamed rubber as long as it has an appropriate sealing performance.

[0025] As shown in Fig. 3, inside the machine room cover 10, the suction side of the radiator 12 upstream of the partition member 20 (i.e., the opposite side to the cooling fan 17) is covered with an insect net 21, for example, in the shape of a rectangular plate, as a foreign object intrusion prevention net, thereby preventing foreign objects such as fallen leaves, garbage, and insects from invading the downstream radiator 12. For example, the lower end of the insect net 21 is inserted into an insect net insertion portion 23 provided on the surface of the lower part of the radiator 12 opposite the cooling fan 17, and the upper end side can be fixed to the top of the radiator 12 with a thumb screw 24. The insect net insertion portion 23 has a shape that narrows from the top to the bottom, making it easy to insert the insect net 21.

[0026] The radiator cover 15 is provided with a net cover 22 that can open and close and covers the net attachment / detachment opening 15a that allows the insect net 21 to be attached and detached. The net attachment / detachment opening 15a is provided over the top and side of the corner of the radiator cover 15. For example, the net cover 22 is made of a perforated steel plate bent into an L-shaped cross section, and is swingable around a net cover hinge portion 22a on the base end side and can be locked to the radiator cover 15 by a net cover lock member 22b on the tip end side. As shown in FIG. 1, when the net cover 22 is opened, at least the upper side of the insect net 21 is exposed. The insect net 21 is provided within the area of ​​the net attachment / detachment opening 15a in a plan view.

[0027] Furthermore, a pressurized tank cover 16 that can open and close the pressurized tank 13 provided above the radiator 12 downstream of the partition member 20 is provided on the radiator cover 15 independently of the net cover 22. The pressurized tank 13 needs to be located at a position higher than the radiator 12, and its upper side protrudes beyond the upper opening 15b of the radiator cover 15. The pressurized tank cover 16 is box-shaped with an open lower surface, can swing around a tank cover hinge portion 16a, and can lock a tank cover lock member 16b at the tip to the upper surface of the radiator cover 15. A tank cover handle 16c may be provided to facilitate opening and closing. The pressurized tank 13 can store the cooling water flowing through the radiator 12, and is usually provided above the radiator 12.

[0028] Next, the maintenance work for the hydraulic excavator 1 according to this embodiment will be described.

[0029] First, a description will be given of the maintenance work of the insect protection net 21 before the start of work and after the end of work. The frequency of the maintenance work of the insect protection net 21 differs depending on the amount of dust at the work site, etc.

[0030] In maintenance work on the insect protection net 21, with the engine 11 stopped, the net cover locking member 22b of the net cover 22 is released and the net cover is swung about the net cover hinge portion 22a to open it.

[0031] This exposes the net attachment / detachment opening 15a provided at the corner of the radiator cover 15. At this time, the insect protection net 21 is easily visible because it is provided within the area of ​​the net attachment / detachment opening 15a in a plan view. Furthermore, with the net cover 22 open, the insect protection net 21 can be easily removed by removing the thumb screws 24 of the insect protection net 21 from above, pulling it towards the front, and then pulling it upward.

[0032] When attaching the insect-proof net 21, the above steps are carried out in reverse order.

[0033] On the other hand, in this embodiment, the radiator cover 15 itself needs to be opened, closed, or removed when repairing the main body of the radiator 12, but the frequency of this is limited and it is usually fixed to the upper panel 10a. Therefore, even when opening the net cover 22 to attach or remove the insect net 21, the upstream side and downstream side of the radiator 12 are maintained separated by the partition member 20 provided between the back surface of the radiator cover 15 and the upper surface of the radiator 12, making it less likely that the partition member 20 will be damaged and easier to maintain a sealed state.

[0034] In this embodiment, even when refilling the pressurized tank 13 with refrigerant or checking the remaining amount of refrigerant, there is no need to remove the radiator cover 15 itself, making it easy to maintain the pressurized tank 13. In addition, since the pressurized tank cover 16 is provided independently of the net cover 22, each cover is lightweight.

[0035] In this way, radiator cover 15 covering the upper side of radiator 12 is independent of bonnet 14, which prevents bonnet 14 from becoming too large and makes it easy to open and close bonnet 14 when, for example, inspecting engine 11. Also, since insect net 21, which requires frequent maintenance to prevent clogging, can be opened and closed while radiator cover 15 remains fixed, maintenance of insect net 21 becomes extremely easy.

[0036] Therefore, according to the construction machine of this embodiment, the radiator cover 15 is provided with a net cover 22 that opens and closes the net attachment / detachment opening 15a that enables the insect net 21 to be attached and detached, thereby making it possible to reduce the weight of the cover that covers the parts in the machine room and making maintenance easier.

[0037] (Other embodiments) The present invention may have the following configurations with respect to the above-described embodiment.

[0038] That is, in the above embodiment, the heat exchanger is a radiator, but is not limited to this and may be an oil cooler, an intercooler, an air conditioner condenser, or the like.

[0039] In the above embodiment, the radiator cover 15 is detachably fixed to the top plate 10a covering the machine room of the upper rotating body 3 by fastening members, but a hinge may be provided to allow the radiator cover 15 to be opened and closed. However, it is more advantageous to configure the radiator cover 15 so that it is opened and closed only when repairing or replacing the radiator 12 itself, and not opened and closed during normal maintenance work, because the partition member 20 will not be damaged or deteriorated due to the opening and closing work.

[0040] In the above embodiment, the construction machine is the hydraulic excavator 1, but is not limited thereto, and may be a hydraulic crane, a wheel loader, or other construction machine having a cooling fan, a heat exchanger, or the like.

[0041] It should be noted that the above-described embodiments are essentially preferred examples, and are not intended to limit the scope of the present invention, its applications, or uses. [Explanation of symbols]

[0042] 1. Hydraulic excavator 2 Undercarriage 2a Crawler 3 Upper rotating body (machine body) 4 Attachment 5 Swivel bearing 6 Counterweight 10 Machine room cover 10a Top plate 11 Engine 12 Radiator (heat exchanger) 13 Pressurized Tank 14 Bonnet 14a Bonnet hinge 14b Bonnet locking member 14c bonnet opener 14d Bonnet support rod 15 Radiator cover (heat exchanger cover) 15a Net attachment / detachment opening 16 Pressure tank cover 16a Tank cover hinge 16b Tank cover locking member 16c Tank cover handle 17 Cooling fan 20 Partitioning material 21 Insect-proof net (net to prevent foreign objects from entering) 22 Net cover 22a Hinge part for net cover 22b Locking member for net cover 23 Insect-proof net insertion section 24 Thumb screws

Claims

1. The machine body, an engine mounted on the machine body and having a cooling fan; a heat exchanger provided adjacent to the cooling fan; a bonnet that covers at least the engine in an openable and closable manner; A heat exchanger cover that is provided independently of the bonnet and covers an upper side of the heat exchanger in a detachable or openable manner; a partition member provided between a rear surface of the heat exchanger cover and an upper surface of the heat exchanger, the partition member separating the downstream side of the heat exchanger, which is the cooling fan side, from an upstream side of the heat exchanger, which is opposite the cooling fan; a foreign object intrusion prevention net that covers the suction side of the heat exchanger upstream of the partition member to prevent the intrusion of foreign objects, The heat exchanger cover is provided with a net cover that can be opened and closed to cover a net attachment / detachment opening that enables attachment and detachment of the foreign object intrusion prevention net. A construction machine characterized by:

2. The heat exchanger cover has a box shape with corners, The net attachment / detachment opening is provided over the upper surface and the side surface of the corner portion of the heat exchanger cover, When the net cover is open, at least the upper side of the foreign object intrusion prevention net is exposed.

2. The construction machine according to claim 1 .

3. The foreign object intrusion prevention net is provided within the area of ​​the net attachment / detachment opening in a plan view.

3. A construction machine according to claim 1 or 2.

4. The heat exchanger cover covers at least the upper side of the heat exchanger, and is detachably fixed by fastening members to a top plate covering a machine chamber of the machine body.

4. A construction machine according to claim 1, wherein the construction machine is a construction machine having a structure similar to that of claim 1.

5. A pressurized tank cover that opens and closes a pressurized tank provided above the heat exchanger on the downstream side of the partition member is provided on the heat exchanger cover independently of the net cover.

5. A construction machine according to claim 1, wherein the construction machine is a construction machine having a structure similar to that of claim 1.

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