JPH0534322Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an oil tank used primarily in hydraulic systems for steering, changing transmission mechanisms, and adjusting the height of a vehicle body in a vehicle.

(Prior art) In modern automobiles, hydraulic systems are used for power steering of the vehicle body, automatic switching of the transmission mechanism, and height adjustment of the vehicle body while driving. The signal is sent to a predetermined actuator through the controller to operate the handle, change gears, or adjust the height.

An example of a conventional oil tank used in the above-mentioned hydraulic system is shown in Fig. 4, in which a pot-shaped oil strainer 4 is suspended from the upper end of a slender bottomed cylindrical body 1. A cap 3 with a level detection rod 5 on the underside (however, there may be no detection rod) is attached to the open end of the cover 2 so that it can be freely fitted and removed in a bayonet manner. An inlet pipe 6 for returning oil from the hydraulic circuit is attached to the bottom wall or the bottom of the side wall, while an L-shaped outlet pipe 7 connected to the pump is airtightly attached to the upper part of the side wall.

The outlet pipe 7 consists of a horizontal part 7a that penetrates the side wall of the body 1 and an upright part 7b, and the inner end of the horizontal part 7a and the upper end of the upright part 7b are cut diagonally and abutted against each other. The joints are welded.

Also, it can be used as an oil suction device for agricultural tractors.
A thick mounting seat is installed above the internal oil level on the side wall of the oil tank, which also serves as a transmission case. The pipe is inserted into the hole in the mounting seat from the outside, the flared flange is brought into contact with the outer surface of the mounting seat, and the flared flange of the delivery pipe is stacked on the outside through packing and connected with multiple bolts to attach the filter, etc. The one that prevents the oil in the tank from leaking outside when the delivery pipe is removed for repair is the
No. 49-133325.

(Problem to be Solved by the Invention) By the way, the former oil tank outlet pipe of the above-mentioned conventional oil tank is susceptible to oil swinging due to vibrations, etc., or sudden oil outflow due to instantaneous operation. However, since the engine room has a complex arrangement of various equipment and there is no extra space, the oil tank is long and narrow as shown in the diagram. Since the oil strainer is installed vertically at the top of the tank, the outlet pipe needed to be set so as not to collide with it, so one pipe was rounded and bent at 90 degrees. Therefore, as described above, the two members, the horizontal pipe and the upright pipe, are diagonally butted together and welded.

There is a risk of air leaks with such welded structures, and if there is an air leak, air will get mixed in with the oil, causing abnormal noise inside the pump or running out of oil. However, with the conventional outlet pipe mentioned above, the welded part is located inside the tank, so it cannot be easily checked from the outside. The reality is that testing is not possible.

On the other hand, in the latter device, the suction auxiliary pipe inside the tank and the delivery pipe are connected on the outside of the oil tank;
Since it is curved at 90 degrees and has a flange that widens at the outer end of the curved part, when assembling it, it cannot be inserted from above the oil tank, but from the outside side of the tank. The mounting seat must have a hole that is considerably larger than the auxiliary pipe, and a sealing material must be applied there, and the auxiliary pipe can be installed against the side wall of the tank. The oil tank is unstable and tends to be set tilted, and the auxiliary pipe protrudes into the tank, wasting installation space. It is difficult to use.

Therefore, this idea makes it possible to easily check from the outside whether there is an air leak in the fixed part of the oil outlet cylinder, and prevents the shipment of defective products. The purpose is to provide an oil tank suitable for use in

(Means for solving the problem) Based on the above-mentioned purpose, this invention suspends an oil strainer and attaches and detaches a cap to the upper end of a bottomed cylindrical body equipped with an inlet and an outlet pipe. As an oil tank for a vehicle with a cover attached, a vertically elongated outlet cylinder with an upper end closed, a lower end open, and a short cylinder mouth horizontally provided at the upper end is placed inside the body and abuts against the inner surface of the side wall of the body. The short cylindrical mouth part is fitted into a pipe insertion part projecting outward from the upper part of the side wall of the body to connect to the outlet pipe, and the outer peripheral edge of the fitting part is fixed. There is.

(Embodiment) An embodiment of this invention will be described with reference to FIGS. 1 to 3. Reference numeral 11 is an elongated cylindrical body with a bottom, and a pot-shaped oil strainer 14 is attached to the upper end of the body. The periphery of the cover 12 suspending the is caulked, and a cap 13 with or without a level detection rod 15 in the center is detachably attached to the open end of the cover 12 in a bayonet style. A pipe insertion part 11a is provided at the top of one side facing outward, and an inlet pipe 16 for oil returning from the hydraulic circuit whose opening is covered with a screen 16a is attached to the bottom wall or the bottom of the side wall. .

Then, on one side inside the body 11, the body 1
1, the upper end is closed as shown in FIG. 3A, the lower end is open, and a circular outlet cylinder 17 is provided with a short cylinder opening 17a horizontally on one side of the upper end. It is disposed in contact with the inner surface of the body, and its short cylindrical mouth part 17a is fitted into the pipe insertion part 11a of the body 11, and an outlet pipe 18 connected to the hydraulic circuit is fitted into the short cylindrical mouth part 17a. The outer peripheral edge of the fitting portion is fixed by welding, brazing, or the like.

The planar shape of the outlet cylindrical body 17 is not limited to a circular shape, but may be other shapes such as a rectangular shape as shown in FIG. Do it in advance.

With the structure described above, when the oil tank is assembled, the periphery of the cap 13 and the outlet of the outlet cylinder 17 are sealed, the whole tank is submerged in water, and the tank is entered from the inlet pipe 16. Air is fed into the fitting and fixing part between the pipe insertion part 11a of the body and the short cylinder mouth part 17a, and the short cylinder mouth part 17.
Check for air leakage from the fitting and fixing part of a and the outlet pipe 18.

At this time, if there is an imperfection in the fixing part, air bubbles will come out from that part, and this condition can be easily confirmed from the outside. If there is no air leak, cap 1
3 is removed and the required amount of oil is stored in the body 11.

The oil is pumped into the outlet cylinder 17 by the operation of the pump.
The oil is taken out from the open lower end of the hydraulic circuit and sent to a predetermined actuator for steering the steering wheel, switching the transmission mechanism, etc. The oil returned from the hydraulic circuit enters the body 11 through the inlet pipe 16.

(Effects of the invention) As described above, in this invention, as an oil tank for a vehicle with an oil strainer installed vertically inside, the upper end is closed, the lower end is open, and the short cylindrical mouth is placed horizontally at the upper end. A vertically elongated outlet cylindrical body is placed in contact with the inner surface of the side wall of the body, and its short cylindrical mouth part is connected to the outlet pipe by fitting into a pipe insertion part protruding outward from the upper part of the side wall of the body. However, since the outer periphery of the fitting part is fixed,
The fixed parts of the outlet cylinder, body, and outlet pipe are exposed on the outside of the tank, and it is possible to easily check from the outside whether there is any air leakage from the fixed parts, and to prevent defective products from being shipped. In addition, there is no risk of contamination of air from the outside. Since the elongated outlet cylinder is in contact with the inner surface of the side wall of the body, it does not collide with the oil strainer installed vertically inside the body, and is stable and easy to set vertically. , there is no wasteful expansion in the arrangement of the outlet cylinder, and the set space is small, and the oil tank itself can be made into a small diameter and elongated one suitable for use in narrow spaces. There is no need to provide a hole larger than the insertion hole into which the short cylindrical mouth part or the outlet pipe is fitted, and there is no need to apply extra sealing material.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of this invention. FIG. 2 is a cutaway plan view taken along the line XX in FIG. 1. FIG. 3A is a perspective view of an example of the outlet cylinder. Figure B is a perspective view of a modified example of the outlet cylinder. Figure 4 is a sectional view of a conventional oil tank. In the figure, 11...Body, 11a...Pipe insertion part, 12...Cover, 13...Cap, 14...
...Oil strainer, 16...Inlet pipe, 17...
Outlet cylindrical body, 17a...Short cylindrical mouth part, 18...Outlet pipe.

Claims (1)

[Scope of utility model registration request] An oil strainer is suspended on the upper end of a bottomed cylindrical body with an inlet and outlet pipe, and a cover with a removable cap is attached to the oil tank.The upper end is closed and the lower end is open inside the body. and a vertically elongated outlet cylinder with a short cylinder opening placed horizontally at the upper end is disposed in contact with the inner surface of the side wall of the body,
An oil tank for a vehicle, in which the short cylindrical mouth part is fitted into a pipe insertion part projecting outward from the upper side wall of the body and connected to an outlet pipe, and the outer peripheral edge of the fitting part is fixed.