JP6852594B2 - Work machine - Google Patents

Description

The present invention relates to a work machine provided with an engine, an oil pump, and an oil filter connected to the engine and the oil pump inside a machine room provided in a vehicle body frame.

Conventionally, there is a work machine including a lower traveling body having a crawler or the like and an upper rotating body (body frame) mounted on the lower traveling body. As a work machine of this type, a driver's cab, various work machines (for example, a work machine composed of a boom, an arm, a bucket, etc.) and a machine room for accommodating various machines are provided on the vehicle body frame. What is known.

Examples of various machines housed in the machine room include an engine, an aftertreatment device connected to the exhaust system of the engine, and an oil pump for supplying oil to the engine and the like.

Generally, an oil filter for filtering oil is provided between the engine and the oil pump. The oil filter needs to be replaced regularly. Therefore, a work machine in which an oil pan (oil pan) is installed in advance under the oil filter is proposed in order to prevent the surrounding area from being contaminated by the oil leaked during the replacement work of the oil filter. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-054177

By the way, in recent years, hybrid specification work machines and the like in which a generator motor is used together with an engine as a drive source have been developed, and the number of various machines installed inside the machine room tends to increase. Further, conventionally, there has been a demand for miniaturization of work machines. Therefore, in recent years, the space between various machines and the vehicle body frame has been reduced.

In order to save such space, an oil filter may be arranged above the mount structure for fixing the engine to the vehicle body frame. Further, when such space saving is attempted, it may be difficult to secure a space for appropriately installing an oil pan such as an oil pan in advance as in the work machine described in Patent Document 1.

If the oil pan is not placed in an appropriate position, the oil that cannot be received by the oil pan will adhere to the mount structure located below the oil filter during the oil filter replacement work. There was a risk that it would end up.

When oil adheres to the mount structure, the constituent articles of the mount structure (particularly, the vibration-proof body made of rubber, resin, etc., which is easily deteriorated by oil) are deteriorated, and the desired vibration-proof property is obtained. There was a risk that it could not be obtained.

The present invention has been made in view of the above points, and a work machine capable of preventing oil from adhering to the engine mount structure during oil filter replacement work while realizing space saving. The purpose is to provide.

In order to achieve the above object, the work machine of the present invention
A work machine having a vehicle body frame provided with a machine room, and having an engine, an oil pump, and an oil filter connected to the engine and the oil pump inside the machine room. ,
A mount structure for fixing the engine to the vehicle body frame is provided.
The oil filter is placed above the mount structure and
The mount structure is attached to the engine side fixing member attached to the engine, the vibration isolator attached to the engine side fixing member, and the vehicle body frame, and is fixed to the engine side via the vibration isolator. It has a body frame side fixing member connected to the member and an oil receiver that covers the upper part of the vibration isolator .
The anti-vibration body is characterized in that it is in contact with a bottom surface portion of the oil receiver.

As described above, in the work machine of the present invention, the oil pan is arranged so as to cover the upper part of the vibration isolator of the mount structure which is greatly affected by the deterioration due to the adhesion of oil. As a result, the oil dripping during the oil filter replacement work is received by the oil pan, so that it is possible to prevent the oil from adhering to the engine mount structure (particularly the vibration isolator). As a result, deterioration of the constituent articles of the mount structure can be prevented.

Further, by arranging the oil filter above the mount structure, it is possible to integrate the mount structure and the oil receiver, which were conventionally located at distant positions. As a result, the space for separately installing the oil pan is omitted, and the space of the machine room is saved.

Further, in the work machine of the present invention,
The engine-side fixing member is attached to the engine at one end and attached to the peripheral surface of the vibration isolator at the other end.
The size of the oil pan is preferably a size that covers the entire peripheral surface portion of the vibration isolator at least in a plan view.
Further, in the work machine of the present invention,
The oil pan is preferably a holding plate of the anti-vibration body formed in a dish shape.

Generally, a pressing plate for fixing the anti-vibration body is arranged so as to abut on the upper portion of the anti-vibration body. Therefore, if the holding plate is formed in a dish shape and used as an oil pan, the provided oil pan can be provided without increasing the amount of constituent articles.

Further, in the work machine of the present invention,
The mount structure preferably has a sealing member between the vibration isolator and the oil pan.

In the case of a configuration in which an oil pan is provided in the mount structure, the oil received by the oil pan is transmitted through a gap (for example, a bolt for fixing and a hole through which the bolt is inserted) of the constituent articles of the mount structure. , There is a risk of adhering to the anti-vibration body. Therefore, by providing a sealing member between the oil receiver and the vibration isolator, it is possible to prevent such oil from adhering.

Further, in the work machine of the present invention,
The mount structure preferably has an oil drain pipe for discharging the oil received by the oil receiver.

If such an oil drain pipe is provided, the oil drain can be recovered without removing the oil receiver. As a result, it becomes possible to prevent oil from adhering to the mount structure during recovery of drainage oil.

The side view which shows the structure of the hydraulic excavator which concerns on embodiment. The side view which shows typically the positional relationship of the engine, the oil pump, the oil filter and the mount structure in the machine room of the hydraulic excavator of FIG. The perspective view which shows the structure of the oil filter of FIG. FIG. 2 is a side view showing a cross-sectional shape of the mount structure of FIG.

Hereinafter, the hydraulic excavator S, which is a work machine according to the embodiment, will be described with reference to the drawings. In the following description, the front and front sides of the hydraulic excavator S in the traveling direction are simply referred to as "front" and "front side", and the rear and rear sides in the traveling direction are simply referred to as "rear" and "rear side".

In the present embodiment, the hydraulic excavator S is used as an example of the work machine, but the work machine of the present invention is not limited to the hydraulic excavator as long as the machine room is provided in the vehicle body frame. .. For example, it may be a crane car or the like.

As shown in FIG. 1, the hydraulic excavator S includes a lower traveling body 1 and an upper rotating body 2 (body frame) rotatably mounted on the lower traveling body 1.

The lower traveling body 1 includes a lower frame 1a and a pair of crawlers 1b provided on both sides of the lower frame 1a. The crawler 1b is driven by a traveling hydraulic motor which is a hydraulic actuator.

The lower traveling body is not limited to the one composed of the lower frame and the crawler, and may be any one provided with a vehicle body frame provided with a machine room. Therefore, the lower traveling body may be one that moves by wheels or one that moves by legs. Further, when the work machine is used on water, the lower traveling body may be a pontoon or the like.

The upper swivel body 2 is provided on the side of the upper frame 2a which is rotatably supported with respect to the lower frame 1a, the cab 2b provided on the front side of the upper frame 2a, and the cab 2b. It has a working machine 2c, a counterweight 2d mounted behind the driver's cab 2b and the working machine 2c, and a machine room 2e defined by an upper frame 2a and a counterweight 2d.

In the driver's cab 2b, the driver operates the hydraulic excavator S such as various levers (not shown) for operating the movement of the work machine 2c, the rotation of the upper swing body 2, and the movement of the lower traveling body 1. Various equipment is provided.

The work machine 2c is rotatably connected to a boom 2c1 rotatably connected to the upper frame 2a of the upper swing body 2, an arm 2c2 rotatably connected to the boom 2c1, and an arm 2c2. It has a bucket 2c3 and a bucket 2c3.

Further, the working machine 2c includes a boom cylinder 2c4 having both ends attached to the upper frame 2a and the boom 2c1 of the upper swing body 2, an arm cylinder 2c5 having both ends attached to the boom 2c1 and the arm 2c2, an arm 2c2, and the arm 2c2. It has a bucket cylinder 2c6 with both ends attached to the bucket 2c3.

The boom 2c1 is rotatably supported by the upper frame 2a of the upper swing body 2, and is rotated by the expansion / contraction operation of the boom cylinder 2c4 with the shaft as a fulcrum. The arm 2c2 is rotatably supported by the boom 2c1, and is rotated by the expansion and contraction operation of the arm cylinder 2c5 with the shaft as a fulcrum. The bucket 2c3 is rotatably supported by the arm 2c2, and is rotated by the expansion and contraction operation of the bucket cylinder 2c6 with the shaft as a fulcrum.

The counterweight 2d maintains the balance of the hydraulic excavator S as a whole with the work machine 2c due to its weight. A space serving as a machine room 2e is formed between the counterweight 2d, the cab 2b, and the working machine 2c.

As shown in FIG. 2, a machine room 2e is defined by the upper frame 2a and the counterweight 2d in the rear portion of the upper frame 2a.

In the machine room 2e, various machines such as an engine 3 as a drive source, a generator motor (not shown), an oil pump 4 for supplying oil to the engine 3 and the like are installed. Further, an oil filter 5 for removing abrasion powder and the like from the oil is arranged in the vicinity of the engine 3.

The engine 3 is fixed to the upper frame 2a by a plurality of mount structures 6. In FIG. 2, only one mount structure 6 located behind the engine 3 is shown for easy understanding.

By the way, the hydraulic excavator S is a hybrid specification model that employs not only the engine 3 but also a generator motor as a drive source. Therefore, the space inside the machine room 2e is smaller than that of a hydraulic excavator that uses only the engine as a drive source because the generator motor is installed.

Therefore, in the hydraulic excavator S, the oil filter 5 is fixed to the upper frame 2a so as to be located above the mount structure 6 to save space in the horizontal direction.

As shown in FIG. 3, the oil filter 5 is composed of a connecting portion 5a for attaching to the upper frame 2a and a main body portion 5b configured as a cartridge for the connecting portion 5a.

The connecting portion 5a is provided with a plurality of mouth portions 5c communicating with the inside of the main body portion 5b. A pipe 5d is attached to the mouth portion 5c. The oil filter 5 and the engine 3 or the oil pump 4 are connected to each other via the pipe 5d.

The main body 5b houses a filter element inside. Therefore, the oil supplied from the engine 3 to the main body 5b via the predetermined mouth 5c is filtered by the filter element, then discharged from the other mouth 5c and supplied to the oil pump 4.

In the oil filter 5 configured in this way, it is necessary to periodically replace the filter element built in the main body 5b. Normally, oil is always present inside the main body 5b, so that oil may leak out during replacement work. If the leaking oil is not properly treated, the oil may adhere to the constituent articles housed in the machine room 2e.

In particular, since the mount structure 6 for fixing the engine 3 to the upper frame 2a is located below the oil filter 5, oil easily adheres to the mount structure 6. When oil adheres to the mount structure 6, the constituent articles of the mount structure 6 (particularly, the vibration isolator 63 (see FIG. 4) made of rubber, resin, etc., which is easily deteriorated by oil) are deteriorated. This may occur and the desired vibration isolation may not be obtained.

Therefore, in the hydraulic excavator S, by providing an oil receiver 64 (see FIG. 4) for receiving the leaked oil in the mount structure 6, a vibration isolator for the oil leaked during the replacement work of the oil filter 5 is provided. It prevents adhesion to 63.

As shown in FIG. 4, the mount structure 6 includes an engine-side fixing member 61 attached to the engine 3, a vehicle body frame-side fixing member 62 attached to the upper frame 2a of the upper swing body 2, and an engine-side fixing member 61. It includes a vibration isolator 63 provided between the vehicle body frame side fixing member 62, an oil receiver 64 that covers the upper part of the vibration isolator 63, and an oil drain pipe 65 that is connected to the oil receiver 64.

The engine-side fixing member 61 includes a plate-shaped fixing portion 61a bent so as to have an L-shaped cross section, an annular portion 61b connected to the lower tip of the fixing portion 61a, and the fixing portion 61a. It has a pair of substantially triangular side wall portions 61c that are connected so as to bridge the side surface portion and the annular portion 61b side surface portion.

A plurality of first fixing holes 61a2 are formed in the first portion 61a1 extending in the vertical direction of the fixing portion 61a. The fixing portion 61a is fixed to the engine 3 by the first bolt B1 via the first fixing hole 61a2. On the other hand, an annular portion 61b is connected to the tip end portion of the second portion 61a3 extending in the horizontal direction of the fixing portion 61a.

An insertion hole 61b1 is formed in the central portion of the annular portion 61b. A vehicle body frame side fixing member 62 and a vibration isolator 63 are inserted into the insertion holes 61b1. Further, an annular retainer 66 having an L-shaped cross section is fitted into the insertion hole 61b1 one by one from the vertical direction, and the retainer 66 fits the inner peripheral surface of the insertion hole 61b1 and the upper and lower edges (the upper and lower edges). That is, the portion in contact with the vibration isolator 63) is covered.

The vehicle body frame side fixing member 62 is a tubular member, is inserted into the insertion hole 61b1 of the annular portion 61b, and is inserted through the insertion hole 61b1 together with the vehicle body frame side fixing member 62 via the vibration isolator 63. , Is fixed to the annular portion 61b. The installation position of the vehicle body frame side fixing member 62 is a position corresponding to the second fixing hole 2a1 formed in the upper frame 2a and the third fixing hole 64a of the oil receiver 64 described later.

The pair of anti-vibration bodies 63 are members for absorbing and reducing the vibration transmitted from the upper frame 2a to the engine 3 or the vibration transmitted from the engine 3 to the upper frame 2a, and are made of rubber or a highly flexible resin. Etc. are formed.

Each of the pair of anti-vibration bodies 63 is formed as an annular member whose central portion protrudes to one side in the axial direction, and is formed on either one side in the vertical direction in the insertion hole 61b1 of the annular portion 61b of the engine side fixing member 61. Is inserted from. Therefore, the protruding portions of the pair of anti-vibration bodies 63 face each other. The surface of the vibration isolator 63 opposite to the surface on which the protruding portion is formed is in contact with the upper frame 2a or the oil pan 64.

The oil receiver 64 is a dish-shaped member having a diameter larger than the diameter of the vibration isolator 63 and the diameter of the main body 5b of the oil filter 5. A third fixing hole 64a is formed in the central portion of the oil receiver 64, and an oil drain hole 64b is formed in the peripheral portion.

The third fixing hole 64a, the tubular body frame side fixing member 62 installed below the third fixing hole 64a, and the second fixing of the upper frame 2a located below the body frame side fixing member 62. A second bolt B2 is inserted through the hole 2a1. The tip of the second bolt B2 protrudes from the second fixing hole 2a1 of the upper frame 2a, and the nut N is screwed.

That is, by screwing the second bolt B2 and the nut N, the oil receiver 64 having the third fixing hole 64a and the vehicle body frame side fixing member 62 which is a tubular member (and by extension, the mount structure 6). ) Is fixed to the upper frame 2a.

Here, a pair of anti-vibration bodies 63 are arranged around the vehicle body frame side fixing member 62, and one of the pair of anti-vibration bodies 63 is in contact with the bottom surface portion of the oil receiver 64. Therefore, the oil receiver 64 is fixed so as to be pressed against the upper surface of the vibration isolator 63 by the screwing of the second bolt B2 and the nut N. That is, the bottom surface portion of the oil receiver 64 serves as a holding plate for the vibration isolator 63.

A washer 68 (seal member) is installed between the head of the second bolt B2 and the peripheral portion of the third fixing hole 64a of the oil pan 64. The washer 68 is an annular member through which a second bolt B2 is inserted. A sealing structure is formed between the second bolt B2 and the peripheral portion of the third fixing hole 64a of the oil pan 64 by the washer 68.

As a result, in the hydraulic excavator S, the oil received by the oil receiver 64 is prevented from being transmitted and adhered to the vibration isolator 63 located below the oil receiver 64 through the third fixing hole 64a. There is.

The seal member of the present invention is not limited to such a washer. For example, a sealing tape may be adopted as the sealing member, and the sealing tape may be wrapped so as to cover the contact portion between the head of the second bolt B2 and the peripheral portion of the third fixing hole 64a of the oil pan 64. Further, rubber or resin may be provided on the upper surface or the lower surface of the washer in contact with the peripheral portion of the second bolt B2 or the third fixing hole 64a to improve the sealing performance.

Further, when the accuracy of the third fixing hole 64a of the washer 68, the second bolt B2 and the oil receiver 64 is sufficiently high and the oil leakage from the third fixing hole 64a is extremely small, the washer 68 (that is, that is, The seal member) may be omitted.

The upper portion of the connecting tubular member 67 is fitted and fixed in the oil drain hole 64b. On the other hand, an oil drain pipe 65 extending to the outside of the machine room 2e is connected to the lower portion of the connecting tubular member 67. The oil received by the oil receiver 64 is guided to the outside of the machine room 2e and discharged through the oil draining structure composed of these.

By providing such an oil drainage structure in the hydraulic excavator S, it is possible to recover the drainage oil without removing the oil pan 64. As a result, it is possible to prevent the oil from adhering to the mount structure 6 at the time of collecting the exhausted oil.

The oil pan of the present invention does not necessarily have to have such an oil drainage structure. For example, when the amount of oil leaking during the oil filter replacement work is small, or when a cloth that adsorbs oil is installed inside the oil pan during the oil filter replacement work, the oil drainage structure is used. (That is, the oil drain hole, the connecting tubular member, the oil drain pipe) may be omitted.

As described above, in the mount structure 6, the oil pan 64 is arranged so as to cover the upper portion of the vibration isolator 63 made of rubber, resin, or the like. As a result, the oil dropped during the replacement work of the oil filter 5 is received by the oil receiver 64, so that the oil is prevented from adhering to the vibration isolator 63. As a result, deterioration of the vibration isolator 63 is prevented.

Further, as the oil filter 5 is arranged above the mount structure 6, the oil receiver 64 can be integrated with the mount structure 6 which has been conventionally located at a distant position. As a result, the space for separately installing the oil pan 64 is omitted, and the space saving of the machine room 2e is realized.

Although the illustrated embodiment has been described above, the present invention is not limited to such an embodiment.

For example, in the above embodiment, a dish-shaped member is used as the oil receiver 64, and the oil receiver 64 is used as a holding member for the vibration isolator 63. This is because the provided oil pan 64 is provided without increasing the amount of the constituent articles. However, the oil pan of the present invention is not limited to such a configuration, and may be any one that can cover the upper part of the vibration isolator.

For example, an oil pan may be formed by a plate-shaped member that is inclined so as to guide the oil leaked from the oil filter and a gutter-shaped member that receives the oil guided by the plate-shaped member. When the oil pan is formed in this way, it is preferable to separately provide a holding member for the vibration isolator.

Further, when a dish-shaped member is used as the oil receiver, it is preferable to use one that can cover the entire vibration isolator and has a diameter larger than that of the main body of the oil filter. However, when the portion where the oil drips from the oil filter is limited, the shape and size of the oil pan may be set so as to correspond to the limited portion.

Further, the vibration isolator may be any as long as it can absorb the vibration from one of the engine side fixing member and the vehicle body frame side fixing member and suppress the vibration from being transmitted to the other. Therefore, the shape, material, shape, and arrangement position of the vibration isolator may be appropriately changed according to the layout inside the machine room and the like. As a result, the shape or size of the oil pan may be appropriately changed according to the material, shape and arrangement position of the vibration isolator.

1 ... Lower traveling body, 1a ... Lower frame, 1b ... Crawler, 2 ... Upper swivel body (body frame), 2a ... Upper frame, 2a1 ... Second fixing hole, 2b ... Driver's cab, 2c ... Working machine, 2c1 ... Boom , 2c2 ... arm, 2c3 ... bucket, 2c4 ... boom cylinder, 2c5 ... arm cylinder, 2c6 ... bucket cylinder, 2d ... counter weight, 2e ... machine room, 3 ... engine, 4 ... oil pump, 5 ... oil filter, 5a ... Connecting part, 5b ... Main body part, 5c ... Mouth part, 5d ... Piping, 6 ... Mount structure, 61 ... Engine side fixing member, 61a ... Fixing part, 61a1 ... First part, 61a2 ... First fixing hole, 61a3 ... 2nd part, 61b ... annular part, 61b1 ... insertion hole, 61c ... side wall part, 62 ... body frame side fixing member, 63 ... vibration isolator, 64 ... oil receiver, 64a ... third fixing hole, 64b ... oil drain hole , 65 ... Oil drain pipe, 66 ... Retainer, 67 ... Cylinder member for connection, 68 ... Seat metal (seal member), B1 ... 1st bolt, B2 ... 2nd bolt, N ... Nut, S ... Hydraulic excavator.

Claims (5)

A work machine having a vehicle body frame provided with a machine room, and having an engine, an oil pump, and an oil filter connected to the engine and the oil pump inside the machine room. ,
A mount structure for fixing the engine to the vehicle body frame is provided.
The oil filter is placed above the mount structure and
The mount structure is attached to the engine side fixing member attached to the engine, the vibration isolator attached to the engine side fixing member, and the vehicle body frame, and is fixed to the engine side via the vibration isolator. It has a body frame side fixing member connected to the member and an oil receiver that covers the upper part of the vibration isolator .
The anti-vibration body is a work machine characterized in that it is in contact with a bottom surface portion of the oil pan. In the work machine according to claim 1,
The engine-side fixing member is attached to the engine at one end and attached to the peripheral surface of the vibration isolator at the other end.
A work machine characterized in that the size of the oil pan is at least a size that covers the entire peripheral surface portion of the vibration isolator in a plan view. In the work machine according to claim 1 or 2.
The oil receiver is a work machine characterized in that it is a holding plate of the vibration-proof body formed in a dish shape. In the work machine according to any one of claims 1 to 3.
The mounting structure is a work machine having a sealing member between the vibration isolator and the oil pan. In the work machine according to any one of claims 1 to 4.
The mount structure is a work machine having an oil drain pipe for discharging the oil received by the oil receiver.

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