JPH04110276U - oil tank - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an oil tank in which the upper part of the tank is not contaminated by oil discharged with air from a breather. [Structure] It consists of a tank body 8 and a breather 2 arranged above it, and an oil receiver 1 is provided below a vent hole 27 provided inside this breather 2. The bottom of the oil receiver 1 and the inside of the tank body 8 are communicated via a check valve 18. The check valve 18 includes an oil return valve 1 that opens when the inside of the tank body 8 becomes negative pressure.
6 is provided.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention collects the oil that is about to scatter as the oil is exhausted, and Concerning an oil tank that does not spill oil.

0002

[Prior art]

Conventionally, as shown in Figures 4 and 5, oil installed in forklift trucks, etc. Some tanks have a breather 9 in the head 82 of the main body. The breather -9 is normally closed, and the inside of the tank body 8 is hermetically sealed. By the way, the oil 81 in the tank body 8 is stored in, for example, the mast system of a forklift. When the cylinder rises, as shown in Fig. 4, oil is supplied to the pump 74 through the oil pipe 75. Then, it is sent into the cylinder 7. At this time, the oil level inside the tank body 8 is The bell (liquid level) 811 falls and becomes a negative pressure state. Therefore, inside the breather 9, an inner valve 92 is installed as shown in FIG. It is pulled down by negative pressure. Therefore, the air 6 flows in through the vent 97 and After passing through the filter 96, the tank is further supplied through the air intake hole 95 and the air distribution port 90. Enter body 8. As a result, the negative pressure inside the tank body 8 is eliminated, and the internal pressure returns to normal. Return to state.

0003 On the other hand, the oil 81 in the cylinder 7 is, for example, a mast cylinder of a forklift. When the cylinder is lowered, as shown in FIG. When the tank body 8 is returned to the tank body 8, the oil level 811 rises and the inside of the tank body 8 becomes pressurized. Ru. Therefore, in the breather 9, as shown in FIG. 2 is pushed up by pressure. As a result, the outer valve 93 It is pulled up by the locking part 922 of the valve 9. Therefore, the air outlet hole 94 It is opened, and a part of the air 6 in the tank body 8 is discharged from the vent 97. It will be done. In addition, the code 921 in the figure is a coil spring for the inner valve, and 931 is a coil spring for the inner valve. The coil spring for the outer valve is shown. In this way, the breather 9 is placed above the oil level 811 in the tank body 8. Every time the internal pressure changes due to downward movements or temperature differences, the internal pressure inside the tank body 8 is adjusted. It works to keep it constant.

0004

[Issue to be solved]

However, the above conventional technology has the following problems. That is, when pressurizing the tank body 8, as shown in FIG. When the oil is discharged from the vent 97, the oil 81 may also blow out. the Therefore, the oil 81 does not fall onto the main body head 82 and contaminate the main body head 82. It becomes. The above oil 81 is caught in the discharged air 6 and is contained in a small amount. However, the number of discharges is large. Therefore, pollution and emissions caused by that oil quantity cannot be ignored. This invention was devised in view of the above-mentioned conventional problems. Collects oil that is about to scatter with air, and prevents it from scattering around. , which aims to provide an oil tank.

[0005]

[Means for solving problems]

The present invention is an oil tank consisting of a tank body and a breather placed above it. In the tank, an oil receiver is provided below the vent provided inside the breather. At the same time, the bottom of the oil receiver and the inside of the tank body are communicated via a check valve. The oil tank is characterized by: The most noteworthy thing about this invention is that there is an opening below the breather vent. An oil receiver is provided, and a check valve is interposed between the oil receiver and the tank body. That is. The oil receiver in the breather is, for example, biased and has approximately the same diameter as the breather body. It is a flat annular saucer (see Figure 1). In addition, the check valve is interposed between the oil receiver and the tank body, and the check valve is installed between the oil receiver and the tank body. It has an oil return valve that opens when there is negative pressure inside the body. The check valve has a valve inside the tank body. It is preferable to provide a filter to prevent dust from entering. In addition, the above breather has oil return and air intake as shown in Example 2. It is preferable to provide a dual-purpose breather.

[0006]

[Action and effect]

In the present invention, an oil receiver is provided below the vent. Therefore, the When the ink body is pressurized, the oil that accompanies the discharged air Blows out into the oil receiver through the vent hole and accumulates in the oil receiver. Also , Air exits from the air outlet. If the inside of the tank body becomes negative pressure, the return pipe is The oil return valve opens. Therefore, the oil that has accumulated in the oil receiver mentioned above must be returned to the It returns to the tank body through the pipe. Therefore, the oil goes to the main body head of the tank body. It will not blow out and cause contamination. Therefore, once the oil has accumulated in the oil reservoir, The oil returns to the tank body, allowing the oil to be reused. Therefore, according to the present invention, it is possible for the oil to be scattered as the oil is exhausted from the oil tank. We provide an oil tank that collects the oil that is lost and does not spray the oil into the surrounding area. can be done.

[0007]

【Example】

Example 1 The oil tank according to the embodiment of the present invention will be explained using FIGS. 1 and 2. . That is, as shown in FIG. 1, the oil tank of this example includes a tank body 8 and an upper portion thereof. It consists of a breather 2 arranged in the An oil receptacle is provided below the vent 27 provided inside the breather 2. 1, and a check valve 18 is provided between the bottom of the oil receiver 1 and the tank body 8. intervene. In addition, the check valve 18 is provided with a valve when the inside of the tank body 8 becomes negative pressure. An oil return valve 16 is provided which opens at the same time.

[0008] As shown in Fig. 1, the breather 2 includes a main body case 20 and a central part thereof. The valve housing 21 provided in the valve housing 21 and the air provided above the valve housing 21 - The intake port 210, the air outlet hole 24 arranged below it, and the valve housing. It has an inner valve 22 that moves up and down within the valve 21. Also, the inner valve The outer valve 23 engages with the valve 22 and moves up and down, and the valve housing 21 The air intake chamber 25 adjacent to the A router filter 26 and a vent 27 provided below the air filter 26. , and an oil receiver 1 provided below the vent hole 27. In addition, the oil receiver 1 is connected to the main body case 10 and the main body case as shown in FIG. An air inlet/outlet hole 11 provided at the upper periphery of the base case 10 and an air inlet/outlet hole 11 provided at the lower part of the main body case 10. It has an oil return hole 12 arranged therein. In addition, below the oil return hole 12, , a cylindrical valve chamber 13, a filter 14 disposed above the valve chamber 13, and the filter 14. It has a check valve 18 consisting of an oil return valve 16 disposed below the router 14. Further, below the oil return valve 16, a return pipe 17 and a return pipe 17 are connected. It has a return nozzle part 85 that is attached and fixed (see FIG. 1).

[0009] The main body case 10 of the oil receiver 1 is the main body case 10 of the breather 2. It has a flat ring dish shape with approximately the same diameter as the base 20. A large number of the air inlet/outlet holes 11 are arranged on the upper periphery of the main body case 10. Ma In addition, the oil return hole 12 is provided at one location below the vent hole 27. Also, top The valve chamber 13 has a cylindrical shape and has a filter mounting part 131 on the upper side. Also, The oil return valve 16 is mounted approximately at the center of the valve chamber 13 by a coil spring 15. energized and placed. Furthermore, there is a space between the valve chamber 13 and the return nozzle section 85. A check valve 18 is provided. Further, the check valve 18 is located at the lower part of the outer periphery of the valve chamber 13. It is attached and fixed by a ring-shaped locking tool 19. The other configurations are as described above. Similar to the example. In addition, in Fig. 1, numeral 221 is the coil spring for the inner valve. A spring 231 indicates a coil spring for the outer valve.

0010 Next, the effects will be explained. In the oil tank according to this example, the oil receiver 1 is arranged below the vent 27. It is set up. Therefore, when the inside of the tank body 8 becomes pressurized, the air A part of the oil 81 along with the air enters the oil receiver 1 through the vent hole 27. The oil 81 then accumulates in the oil receiver 1. In addition, in the above pressurized state, In other words, the air 6 is connected to an air outlet 24, an air intake chamber 25, a vent 27, an air It goes out through the entrance/exit hole 11. On the other hand, in a negative pressure state, the inner valve 22 is lowered and the air 6 is Air inlet/outlet hole 11, ventilation port 27, air filter 26, air intake port 210 It enters through the gap between the inner valve 22 and the outer valve 23. In addition, when the inside of the tank body 8 becomes a negative pressure state, the valve chamber 13 is equipped with a The oil return valve 16 opens toward the tank body against the biasing force of the coil spring 15. Ku. Then, the oil return valve 16 biased by the coil spring 15 and the valve A gap is created between the chamber and the oil return hole 132. Therefore, the above oil receiver 1 The oil 81 accumulated inside returns to the tank body 8 through the return pipe 17. Therefore, oil 81 blows out to the main body head 82 of the tank main body 8 as in the conventional case. The main body head 82 is not contaminated. Also, the oil 81 accumulated in the oil receiver 1 is collected into the tank body 8. Therefore, the oil can be reused.

[0011] Example 2 In this example, as shown in Figure 3, air flows from the oil return valve together with oil during negative pressure. It is configured so that it can fit in. That is, the oil receiver 3 of this example includes the main body case 30 and the main body case 30. an air inlet/outlet hole 31 and an air intake chamber 32 formed by the main body case 30. It becomes more. The body case 30 is a flat ring with approximately the same diameter as the body case 20 of the breather 2. It has a plate shape. Additionally, the air intake hole 31 is located above the main body case 30. A large number of them will be provided. Additionally, the air intake chamber 32 has an air filter installed inside it. I don't have it.

0012 As in the first embodiment, an oil return valve 16 is provided below the main body case 30. A check valve 18 having an internally installed check valve 18 is provided. The other configurations are the same as in the first embodiment. Since the breather 3 of this example is configured as described above, the inside of the tank body 8 is When pressurized, it operates as follows. First, the air 6 passes through the flow port 90 and pushes up the outer valve 23. stop The air 6 enters the air intake chamber 32 through the air blowout hole 24. this At this time, all of the oil 81 blown out together with the air 6 accumulates in the oil receiver 3. circle.

[0013] On the other hand, when the inside of the tank body 8 is in a negative pressure state, the check valve 18 is activated as follows. It works like a sea urchin. First, the oil return valve 16 resists the coil spring 15 and moves downward due to negative pressure. Go down. Next, the gap created between the oil return valve 16 and the oil return hole 132 is The oil 81 falls into the tank body 8. Also, air 6 is connected to air intake hole 3. 1, passes through the filter 14, and enters the tank body 8. And the tank The inside of the main body 8 is in a normal state. According to this example, there is no need to install an air filter in the air intake chamber. Therefore, it is desirable to provide an oil tank having the same effects as in Example 1 at a lower cost. I can do it.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an oil tank according to a first embodiment.

FIG. 2 is an enlarged sectional view of the vicinity of the check valve according to the first embodiment.

FIG. 3 is a partial sectional view of an oil tank according to a second embodiment.

FIG. 4 is an explanatory diagram of the entire conventional oil tank.

FIG. 5 is a sectional view of an oil tank according to a conventional example.

FIG. 6 is a sectional view of a conventional oil tank in a negative pressure state.

FIG. 7 is a sectional view of a conventional oil tank in a pressurized state.

[Explanation of symbols]

1,3. ．． ．． oil receiver, 11,31. ．． ．． air intake hole, 16. ．． ．． oil return valve, 17. ．． ．． return pipe, 18. ．． ．． non-return valve, 2. ．． ．． Breather, 22. ．． ．． inner valve, 23. ．． ．． Outer valve, 25, 29. ．． ．． air intake room, 26. ．． ．． filter, 27. ．． ．． vent, 8. ．． ．． Tank body, 81. ．． ．． oil, 82. ．． ．． Main body head,

Claims (1)

[Scope of utility model registration request] Claim 1: In an oil tank consisting of a tank body and a breather arranged above the tank body, an oil receiver is provided below a vent provided inside the breather, and the bottom of the oil receiver and the inside of the tank body are provided with an oil receiver below the vent provided inside the breather. An oil tank characterized in that the two are communicated with each other via a check valve.