JPS6154961B2 - - Google Patents

Description

OBJECTS OF THE INVENTION Field of the Invention The present invention relates to oil containers, such as those used in hydraulic steering systems.

BACKGROUND OF THE INVENTION By means of a high-pressure pump, oil is removed from its oil container during operation of the steering system, while the oil is returned again into the oil container, in which it is first filtered. be allowed to pass.

Conventionally, as such an oil container, an oil container commercially available in the Federal Republic of Germany is known (Federal Republic of Germany Patent Application Publication No. 1036817). This conventional oil container is described in the preamble of claim 1, and includes a hollow cylindrical filter cartridge that is replaceable through the container mouth, and uses the central passage of the filter cartridge as an inflow chamber. in that case, closing a first filter opening formed at one end of the central passage;
In order to form a safety valve by the end surface opposite to the first filter opening and the spring, the filter cartridge is an oil container which is pressed hermetically against a seat surrounding the oil inlet. It's hot,
An oil inlet and a seat are provided on the wall of the oil container located on the opposite side of the container opening. Moreover, the container mouth is closed with a lid. The filter cartridge is pressed against the seat by a spring, and when the inlet chamber becomes under pressure higher than the permissible value due to dirt on the filter, the filter cartridge is released from its seat and the oil is passed into the oil container. For fixing the filter cartridge, one end of the spring is designed as a hook and is hooked into an eyelet in the lid attached to the container opening. The other end of the spring is screwed to the filter cartridge.

(Problem to be Solved by the Invention) When replacing the filter or refilling the oil in a conventional oil container with such a configuration, the lid and spring attached to the container mouth are twisted together. , loosen the screws to separate the spring and filter cartridge, disassemble all parts for fixing the filter cartridge, such as the lid, spring, and filter cartridge, and replace the filter or inject oil. Then it must be reassembled. The work of disassembling and assembling such parts for fixing the filter cartridge requires removing dirty screws and springs, cleaning them, and then reassembling them, which is a time-consuming and dirty work as a whole. Additionally, individual parts may be lost during disassembly, cleaning, and assembly.

The present invention has been made with these points in mind, and it is possible to replace the filter cartridge or re-inject oil very easily and without dirty work. The purpose is to provide an oil container in which individual parts are not lost.

(Structure of the Invention) (Means for Solving the Problems) The present invention comprises a hollow cylindrical filter cartridge that is replaceable through the container mouth, and uses the central passage of the filter cartridge as an inflow chamber, in which case A first hole formed at one end of the central passageway.
The filter cartridge is sealed in a seat surrounding the oil inlet in order to close the filter opening of the first filter opening and form a safety valve with the end face opposite the first filter opening and the spring. It is an oil container that is pressed against the oil inlet 6 and the seat 22.
are provided on the container wall 16 of the oil container 2 located on the opposite side of the container opening 8, and closing members 32, 34, which are recessed sealingly into the first filter opening 28, are attached to the edge of the container opening 8. The compression spring 5 is loosely attached to a fixing device 46 that is detachably attached to the compression spring 5.
8, the closing members 32, 34 and the fixing device 4
6, the two parts are pressed apart, and the fixing device 46 is inserted into the container opening 8 for oil injection.
An oil container equipped with a replaceable filter cartridge and a safety valve, characterized in that the oil container can be removed from the tank.

(Function) The oil container according to the present invention has a number of functions as follows.

(1) The compression spring forces the filter cartridge against the seat in the container wall, thereby positioning and fixedly supporting the filter cartridge and configuring the safety valve.

(2) When removing the fixing device from the container mouth, since the fixing device is coupled to the filter cartridge, both the fixing device and the filter cartridge can be removed from the oil container together.

(3) The filter cartridge can be easily removed from the closure for the first filter opening.

Therefore, when replacing the filter cartridge, the filter cartridge and fixing device can be removed from the oil container and replaced.
In addition, when refilling with oil, the fixing device and the closing member can be separated from the filter cartridge, and the filter cartridge can be refilled with oil while remaining in the oil container.

Thus, according to the invention, changing or refilling the filter cartridge can be carried out very simply and without dirty work.

Further, according to the embodiment of the present invention described in claim 2, the compression spring has two functions. These two functions, as already mentioned, force the filter cartridge into its seat.
This has the function of providing a valve action and the function of pressing the fixing device from the inside towards the edge of the container mouth and fixing the fixing device to the fixing projection.

(Example) Next, an example of the present invention will be described in detail based on the drawings.

The oil container 2 is made of synthetic resin and has an oil outlet nipple 4, an oil introduction nipple 6, and a container opening 8. Container mouth 8 is oil injection nipple 9
This oil injection nipple 9 can be closed airtight by a lid 12 with an annular seal 14.

A positioning stand 1 is installed inside the container wall 16 at the bottom of the oil container 2.
8 protrudes, and this positioning base 18 continues into the interior of the oil introduction nipple 6. The positioning base 18 has a positioning cone 20 and an annular seat 22.

The filter cartridge 24 has a hollow cylindrical shape and has a central passage 26. This central channel 26 is connected on both end faces to the outer chamber by an opening in each case, namely a first filter opening 28 and a second filter opening 30. Oil flows radially outwardly through the filter cartridge from the central passageway 26.

The filter cartridge is seated airtight on the annular seat 22 by the second filter opening 30. The locating cone 20 facilitates the installation of the filter cartridge. The annular seat 22 forms an annular plane 2 that seals the end face 29 of the filter cartridge.
7 and a generally cylindrical positioning surface 31 partially cut out by an overflow passage 33 or 33a having an arcuate, semicircular or other shaped cross section. The overflow passage must not interfere with the positioning action of the positioning surface 31, and must allow oil to immediately overflow when the filter cartridge floats up even slightly. The oil passes from the central passage 26 through an overflow passage to rear faces 29 and 2.
7 and flows into the inner chamber of the oil container.

A flared stopper 32 is pushed into the first filter opening 28 from above. This plug 32 is used to seal the first filter opening and to support the filter cartridge. The lid plate 34 of the stopper 32 is provided with a tubular component 36 that is loosely fitted onto the fixing device 46 . This tubular part 36 forms part of the plug 32 and has an external flange 38 at its upper end. The outer surface of the outer flange 38 has a conical tip, for example. The outer wall of the inner tubular part 36 has an arcuate notch 40, as shown in FIGS. Therefore, it acts as an outlet for oil.

The outer tubular part 42 has an internal flange 44 with a tapered inner surface, such as a conical surface.
This tubular part 42 forms part of a fixation device 46 which is used as a fixation part. This fixing device 46 has a transverse member 48 which is reinforced by upright ribs 50. The rib 50 also serves as a handle. The fixation device 46 has a central opening 52 that continues directly into the central opening of the outer tubular part 42 .

As shown in FIGS. 1 to 3, the oil filling nipple 9 of the oil container has two arc-shaped projections 54 in positions facing each other, which slightly narrow the filling opening. There is. This protruding portion 54 is provided with fixing notches 56 at both ends of the horizontal beam cross member 48 on its lower surface.

As shown in FIGS. 1 and 4, the compression spring 5
8 rests on the one hand on the lower end face of the cross member 48 and on the other hand on the upper shoulder 59 of the cover plate 34 of the stopper 32.

When the tubular parts 36 and 42 are molded from synthetic resin,
The two can fit into each other by temporary contraction and expansion due to elastic action, so that they latch tightly onto each other. The already fitted compression spring 58 tends to force the outer flange 38 and the inner flange 44 apart until the final position where they abut (see FIG. 4).

During use, the stopper 32 is connected to the filter cartridge 2.
4 into the first filter opening at the top. For this purpose, the filter cartridge is pressed against the stopper 32 from below. First, compression spring 58 is compressed. When the lid plate 34 of the bung 32 reaches the internal flange 44, a strong pressure connection is created which forces the bung 32 into the first filter opening. The bung 32 then securely holds the filter cartridge and seals the first filter opening.

The filter cartridge fixed to the fixing device 46 is then inserted into the oil container 2 through the container opening 8 and the second filter opening is seated on the positioning cone 20. The fixing device 46 is removably attached to the container mouth 8 so that both ends thereof bite into the fixing notch 56 from below. The compression spring 58 ensures that this fixing device 46 is held in its fixing recess 56 by pressure from below and, on the other hand, presses the filter cartridge against the annular plane 27. The desired safety valve action is thereby achieved.

The hydraulic pressure in the central passage 26 acts on the lower surface of the lid plate 34. A compression spring 58 forces the filter cartridge into its seat 2 if its pressure exceeds a maximum allowable value.
It is designed to rise from 2.

When replacing the filter, use the fixing device 4.
6 is removed, and the filter cartridge 24 together with this fixing device 46 is taken out from the oil container 2. The used filter cartridge 24 is easily removed and discarded using a disposable cloth. Thereafter, a new filter cartridge 24 is installed, placed into the oil container 2 again together with the fixing device 46, and fixed to the oil container 2.

In addition, when refilling oil, the fixing device 46 and lid 32 are separated and removed from the filter cartridge 24, and oil is refilled while the filter cartridge 24 is left in the oil container. Attach.

As described above, according to this embodiment, when replacing the filter cartridge 24 or refilling the filter cartridge 24, it can be done very easily and without dirty work.

Note that the inner tubular part 36 and the outer tubular part 42 may be made of metal instead of synthetic resin, but in this case, the outer tubular part 36 and the outer tubular part 42 are Advantageously, the tubular part is provided with a slit running parallel to the axis.

(Effects of the Invention) As described above, according to the present invention, when replacing the filter cartridge or refilling the filter cartridge with oil, the replacement or refilling can be performed very easily and without dirty work. There is no need to mix up individual parts.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the main part of the oil container with the filter cartridge, Figure 2 is a plan view of the main part of the oil container with the lid removed, and Figure 3 is a partial cross-section of the oil container in Figure 2. 4 is an axial longitudinal sectional view of the unit of the filter support shown partially in side view, FIG. 5 is a plan view of the filter support shown in FIG. 4, and FIG. 6 is the view shown in FIG. FIG. 7 is a plan view of the positioning table 18 seen from the direction of the arrow in FIG. 1 when the filter cartridge is removed. 2... Oil container, 4... Oil lead-out nipple, 6... Oil introduction nipple, 8... Container mouth, 16... Vessel wall, 22...
Seat, 24... Filter cartridge, 28... First filter opening, 30... Second filter opening,
32... Stopper, 34... Lid plate, 36... Inner tubular part,
38... External flange, 42... Outer tubular part, 4
4... Internal flange, 46... Fixing device, 48... Crossing member, 54... Projection, 56... Fixing notch, 58
...compression spring.

Claims (1)

[Scope of Claims] 1. A hollow cylindrical filter cartridge replaceable through the container mouth, with a central passage of the filter cartridge used as an inlet chamber, in which case a filter cartridge formed at one end of the central passage The filter cartridge is sealed in a seat surrounding the oil inlet in order to close the first filter opening and form a safety valve with the opposite end face of the first filter opening and the spring. In the oil container that is pressed against the surface of the oil container, the oil introduction part 6 and the seat 22 are provided on the container wall 16 of the oil container 2 located on the opposite side of the container opening 8. A fixing device 46 is detachably attached to the edge of the container mouth 8 to allow the closing members 32 and 34 to be bitten into it.
a compression spring 58 is pressed against the closure members 32, 34 and the locking device 46 to separate the two parts; and the locking device 46 is connected to the container opening for oil injection. 3. An oil container equipped with a replaceable filter cartridge and a safety valve. 2. The replaceable device according to claim 1, wherein the fixing device 46 is supported by being bitten into the edge of the container mouth 8 from the inside by the force of a compression spring 58. An oil container equipped with a filter cartridge and a safety valve. 3 As a closing member, the first filter opening 2
An oil container equipped with a replaceable filter cartridge and a safety valve according to claim 1 or 2, characterized in that a stopper 32 that is fitted into the oil container 8 is used. 4. The fixing device 46 has a cross member 48 whose ends are provided with projections 54 located diametrically opposite each other on the edge of the container opening 8.
Claims 1 to 3, characterized in that the projecting portion is provided with fixing notches 56 at both ends of the cross member. An oil container having a replaceable filter cartridge and a safety valve as described in . 5 The seat 22 surrounds a positioning base 18 which projects into the oil container 2 and which, in the operating state, seals the second filter opening 30 under the force of a compression spring 58. An oil container comprising a replaceable filter cartridge and a safety valve according to any one of claims 1 to 4. 6 The seat 22 has an annular plane 27 sealing off one end face 29 of the filter cartridge and a positioning surface 31 that projects into the second filter opening 30 for positioning the filter cartridge. In this case, the overflow passage 3 is provided on the positioning surface 31.
An oil container equipped with a replaceable filter cartridge and a safety valve according to claim 5, characterized in that the oil container has a replaceable filter cartridge and a safety valve.