JP2009270703A - Hydraulic oil tank for working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide efficient cleaning work of a hydraulic oil tank in a short time by preventing remaining of foreign matters mixed in hydraulic oil in a bottom of the hydraulic tank without being discharged when extracting the hydraulic oil from an oil drain hole provided in a bottom of the hydraulic oil tank. <P>SOLUTION: In the hydraulic oil tank 11 for the working vehicle 1 with the oil drain hole 13 in the bottom, by erecting crossing partition plates 14 with an intersection point facing an accumulating part (a) of the oil drain hole 13 in the bottom 12a of the hydraulic oil tank 11, the foreign matters remaining in the bottom 11a of the hydraulic oil tank 11 can be collected in the accumulating part (a) of the oil drain hole 13 along the partition plates 14 just by tilting the hydraulic oil tank 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hydraulic oil tank provided in a work vehicle such as a crawler tractor or a construction machine.

  2. Description of the Related Art Conventionally, work vehicles such as a crawler tractor and a construction machine are provided with a hydraulic oil tank that supplies hydraulic oil to a plurality of hydraulic devices and recirculates return oil from these hydraulic devices. When the hydraulic device is repaired or when the hydraulic fluid has deteriorated and the hydraulic fluid needs to be replaced, the hydraulic fluid is extracted from the drain hole provided in the bottom of the hydraulic oil tank.

  However, when the hydraulic oil is extracted from the oil drain hole as described above, the foreign matter mixed in the hydraulic oil remains on the bottom surface of the hydraulic oil tank without being discharged, so the foreign matter remaining on the bottom surface of the hydraulic oil tank is discharged. For this reason, there is a problem in that the cleaning operation for the operation must be repeated, and the operation time is long.

In addition, in a fuel tank provided in a vehicle such as an automobile, a funnel-shaped separator having a drainage hole in the central recess at the center of the bottom of the fuel tank and gently sloping from the periphery of the fuel tank toward the center The fuel tank is divided into a fuel chamber and a puddle chamber, and the water mixed in the fuel tank is separated by the specific gravity difference and collected in the puddle chamber, while A configuration is known in which water accumulated in a chamber is prevented from being dispersed into a fuel layer as water droplets (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 53-69008 (FIG. 2)

  As described above, when the hydraulic oil is extracted from the drain hole provided at the bottom of the hydraulic oil tank, if foreign matter mixed in the hydraulic oil remains on the bottom surface of the hydraulic oil tank without being discharged, the bottom surface of the hydraulic oil tank Therefore, it was necessary to repeat the cleaning operation for discharging the foreign matter remaining on the substrate, and it was necessary to shorten the operation time and increase the efficiency. Further, even if the bottom structure of the fuel tank of Patent Document 1 described above is adopted in the hydraulic oil tank, there is room for improvement because foreign matters mixed in the hydraulic oil cannot be collected in the vicinity of the oil drain hole.

An object of the present invention is to solve the above-described problem, and in a hydraulic oil tank of a work vehicle having an oil drain hole at the bottom, foreign matters mixed in the hydraulic oil in the hydraulic oil tank are The first feature is that a foreign matter collecting body to be collected in the reservoir of the oil drain hole is provided.
A second feature of the present invention is that the foreign matter collecting body is an intersecting partition plate erected on the bottom surface of the hydraulic oil tank so that the intersection point faces the oil drain hole reservoir.

According to the first aspect of the present invention, when the hydraulic oil is extracted from the drain hole provided at the bottom of the hydraulic oil tank for maintenance or the like, foreign matter mixed in the hydraulic oil is collected in the drain hole through the foreign substance collector. Therefore, the cleaning operation time for discharging the foreign matter remaining on the bottom surface of the hydraulic oil tank can be shortened and efficiency can be improved.
And according to invention of Claim 2, the said foreign material collection body is the cross-shaped partition plate of the cheap and simple structure erected on the bottom face of the hydraulic oil tank so that an intersection may face the reservoir part of an oil drain hole. Yes, when draining the hydraulic oil from the drain hole provided at the bottom of the hydraulic oil tank for maintenance etc., tilt the hydraulic oil tank several times so that the foreign matter remaining near the bottom of the hydraulic oil tank is aligned with the partition plate. Since the oil can be collected in the reservoir of the oil drain hole, the cleaning operation time for discharging the foreign matter remaining on the bottom surface of the hydraulic oil tank can be shortened and efficiency can be improved. Also, when the work vehicle is running, the oil drainage hole is automatically guided by the partition plate guiding foreign matter existing near the bottom of the hydraulic oil tank due to the response of the hydraulic oil in the hydraulic oil tank as the aircraft inclines. Collected in the reservoir. Furthermore, there is an advantage that the bottom surface rigidity of the hydraulic oil tank is improved.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are a side view and a plan view of an agricultural crawler tractor 1 which is an example of a work vehicle. The agricultural crawler tractor 1 has an engine 3 on a body frame 2 in the same manner as a normal agricultural tractor. The cabin 5 is provided with a cabin 5 and the like, and the cabin 5 is provided with a control section 6 in which various operating levers and switches are arranged, including a seat (not shown) on which an operator is seated.

  A three-point link type work machine lifting device 7 on which a work machine for performing various operations is mounted is always installed in the lower rear part of the cabin 5. 8L and 8R are left and right crawler type traveling devices, and the body frame 2 is supported on the crawler type traveling devices 8L and 8R.

  In addition, left and right steps 9L and 9R are provided above the crawler type traveling devices 8L and 8R at the lower left and right sides of the cabin 5 as a foothold when an operator gets into the crawler tractor 1, and these left and right steps 9L and 9R are provided. A hydraulic oil tank 11 for storing hydraulic fluid for hydraulic equipment and a fuel tank 12 for storing fuel for the engine 3 are mounted on the rear body frame 2 separately from each other.

  3 is a side view of the hydraulic oil tank 11, FIG. 4 is a plan view of the hydraulic oil tank 11 partially broken, and FIG. 5 is a front view of the hydraulic oil tank 11 partially broken. As shown in FIG. 3, the hydraulic oil tank 11 has a substantially trapezoidal box shape in which a plurality of metal plates are integrally formed by welding. An oil drain hole 13 is provided.

  More specifically, on the bottom surface 11 a (inner surface) constituting the hydraulic oil tank 11, an inexpensive and simple cross-shaped partition plate 14 is set up so that the intersection point faces the reservoir portion a of the oil discharge hole 13 described above. Has been established. The partition plate 14 acts as a foreign matter collecting body that collects foreign matter mixed in the hydraulic oil in the hydraulic oil tank 11 in the reservoir a of the drain oil hole 13. For example, the hydraulic oil tank 11 is used for maintenance or the like. When draining the hydraulic oil from the oil drain hole 13 provided in the bottom part 11a of the oil tank, the hydraulic oil tank 11 is tilted several times so that foreign matters mixed in the hydraulic oil can be collected in the reservoir a of the oil drain hole 13 via the partition plate 14. Therefore, the cleaning operation time for discharging the foreign matter remaining on the bottom surface 11a of the hydraulic oil tank 11 can be shortened, and the efficiency can be improved.

  When the agricultural crawler tractor 1 is traveling, foreign matter existing near the bottom surface 11a of the hydraulic oil tank 11 is guided to the partition plate 14 by the reaction of the hydraulic oil in the hydraulic oil tank 11 accompanying the inclination of the airframe. However, the oil is automatically collected in the reservoir a of the oil drain hole 13 as indicated by an arrow A in FIG. Further, the partition plate 14 can provide an advantage that the rigidity of the bottom surface 11a of the hydraulic oil tank 11 is improved.

  Further, the left and right crawler type traveling devices 8L and 8R described above support the drive sprocket 16 at the front ends of the traveling frames 15L and 15R formed integrally with the lower part of the body frame 2, and the rear ends of the traveling frames 15L and 15R. An idler 17 is attached to the part. Two sets of equalizer arms 19 including a pair of front and rear rollers 18 are supported between the drive sprocket 16 and the idler 17 and below the traveling frames 15L and 15R so as to be swingable up and down. Further, an upper roller 21 is pivotally supported on the upper part of the front and rear intermediate positions of the traveling frames 15L and 15R. The drive sprocket 16, the idler 17, the pair of front and rear rollers 18 provided in the two sets of equalizer arms 19, and The crawler belts 22 wound around the upper roller 21 constitute left and right crawler type traveling devices 8L and 8R.

  By the way, when the agricultural crawler tractor 1 runs on a soft field, mud containing much moisture is carried around by the crawler belt 22 of the crawler type traveling devices 8L and 8R and falls onto the upper surfaces B of the traveling frames 15L and 15R. Therefore, the upper surface B of the traveling frames 15L and 15R is formed as an inclined surface that becomes lower from the inner side to the outer side as shown in FIG. 8, so that mud is attached to the upper surface B of the traveling frames 15L and 15R. And trying to prevent it from accumulating.

  However, even if the upper surfaces B of the traveling frames 15L and 15R are formed as inclined surfaces as described above, mud containing much moisture is likely to adhere to the upper surfaces B of the traveling frames 15L and 15R, and thus the traveling frames 15L and 15R It was troublesome to remove the mud adhering to the upper surface B of the work after running.

  Therefore, by using the exhaust gas having a high temperature discharged from the exhaust manifold of the engine 3 to quickly dry the mud containing a lot of moisture adhering to the upper surfaces B of the traveling frames 15L and 15R, It is configured so that it can be easily peeled off from the upper surface B of the traveling frames 15L, 15R, and specific examples thereof will be described below.

  FIG. 6 is a plan view showing the structure of the traveling frames 15L and 15R and the flow of exhaust gas with arrows. The traveling frames 15L and 15R are integrally connected to the front and rear horizontal frames 23F and 23R, and the whole of them. The shape is substantially box-shaped. Then, left and right housings 24L and 24R project from left and right sides of the front horizontal frame 23F in order to attach a traveling hydraulic motor (not shown). In addition, a rear mounting base 25 is fixed to a central portion of the rear horizontal frame 23R to support a pair of left and right lift cylinders, a lower link, etc. (not shown) constituting the three-point link type work machine lifting device 7. is doing. The traveling frames 15L, 15R and the front and rear horizontal frames 23F, 23R are all formed in a substantially square pipe shape.

  The exhaust gas can be introduced into the lower surface side d portion of the front side horizontal frame 23F through a pipe branched from the exhaust pipe of the engine 3 to the muffler 26, and both left and right end portions of the horizontal frame 23F. 7 and FIG. 8, a communication space communicating with a lower space S on the upper surface B of the traveling frames 15L and 15R, that is, a substantially triangular cross-sectional space formed in the longitudinal direction of the traveling frames 15L and 15R. A port 27 is formed, and the exhaust gas is configured to be introduced into the lower space S of the upper surface B of the traveling frames 15L and 15R through the communication port 27.

  Further, the exhaust gas introduced into the lower space S on the upper surface B of the traveling frames 15L and 15R is viewed in plan view from the rear of both traveling frames 15L and 15R, that is, from the side of the body of the lower space S, as shown in FIGS. The front end portion is discharged to the outside through the exhaust pipe 28 protruding from the rear mounting base 25.

  As described above, when exhaust gas having a high temperature discharged from the exhaust manifold of the engine 3 is introduced into the lower space S of the upper surface B of the traveling frames 15L and 15R, the surface temperature of the upper surfaces B of both traveling frames 15L and 15R is increased. As a result, it becomes possible to quickly dry the mud containing a lot of moisture adhering to the upper surfaces B of both the traveling frames 15L and 15R, and the mud thus solidified is easily peeled off from the upper surfaces B of the traveling frames 15L and 15R. This reduces the workload of cleaning work.

A side view of an agricultural crawler tractor. The top view of an agricultural crawler tractor. The side view of a hydraulic oil tank. The top view of the hydraulic oil tank which fractured | ruptured a part. The front view of the hydraulic oil tank which fractured | ruptured a part. The top view which shows the structure of a driving | running | working frame, and the flow of exhaust gas. EE sectional drawing in FIG. FF sectional drawing in FIG. The rear view which shows the structure of a driving | running | working frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 11 Hydraulic oil tank 13 Oil drain hole 14 Foreign material collection body (partition plate)
a Reservoir

Claims (2)

  In the hydraulic oil tank (11) of the work vehicle (1) having the oil drain hole (13) at the bottom, foreign matter mixed in the hydraulic oil in the hydraulic oil tank (11) is removed from the oil drain hole (13). A working oil tank for a work vehicle, characterized in that a foreign matter collector (14) that collects in a reservoir (a) is provided.   The said foreign material collector (14) is a cross-shaped partition plate erected on the bottom surface (11a) of the hydraulic oil tank (11) so that the intersection point faces the reservoir (a) of the oil drain hole (13). Item 4. A hydraulic oil tank for a work vehicle according to Item 1.

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