JPH11301504A - Fixing structure for reservoir tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a fixing structure for an oil reservoir tank at a low cost and in which the direction of the return pipe or the direction of the letters on the cap can be set in the discretionary direction. SOLUTION: An annular groove 25 for the insertion of an O-ring is formed in the upper portion of an oil pump 20 and an O-ring 26 is inserted. A reservoir tank attachment portion 24 with a taper and formed in an inverted cone shape is formed below the annular groove 25 in the oil pump 20. A reservoir tank 21 is cylindrical with the lower portion open. That lower portion is an attachment portion 27 for attachment to the oil pump 20. The periphery of the attachment portion 27 for attachment to the oil pump has a taper and is formed into a cone shape. Slits 29 are formed in a plurality of locations in the cone- shaped portion for flexibility. A tie-band 22 is tightened around the periphery of the attachment portion 27 for attachment to the oil pump of the reservoir tank 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reservoir tank fixing structure. More specifically, the present invention relates to a mounting structure of a reservoir tank to a power steering oil pump used in a vehicle, and more particularly to a versatile fixing structure of a reservoir tank in which a mounting direction can be freely set.

[0002]

2. Description of the Related Art In recent years, power steering has been used in vehicles. Therefore, an oil pump driven by the engine is provided, and an oil reservoir tank for storing the circulating oil is provided. In some cases, the oil reservoir tank is made of resin and directly attached to a metal oil pump.

FIG. 3 shows a structure in which a conventional oil reservoir tank is directly attached to an oil pump.
(A) is an exploded perspective view, (b) is a partial sectional view. As shown in FIG. 1A, the mounting structure of the reservoir tank to the oil pump is such that the upper part of the main body 2 of the oil pump 1 is formed in a cylindrical shape, and an annular groove for inserting an O-ring is formed near the upper end of the cylindrical portion 3. 4 are formed, and a plurality of screw holes 5 for mounting a reservoir tank are formed on the upper surface of the main body 2.

On the other hand, the lower part of the reservoir tank 6 has a cylindrical shape which can be fitted to the columnar part 3 of the oil pump.
A tank cap 7 is provided at an upper part, and a mounting piece 9 having a mounting hole 8 formed at a lower part corresponding to the screw hole 5 for mounting the oil pump is formed. Further, a character 10 is displayed on the cap 7, and a return pipe 11 is provided on a side surface of the tank.

In order to mount and fix the reservoir tank 6 on the oil pump 1, an O-ring 10 is inserted into the annular groove 4 of the oil pump 1 as shown in FIG. The lower portion of the reservoir tank 6 is fitted, the bolt 14 is inserted into the mounting hole 8 into which the metal collar 11 has been press-fitted in advance, and the screw is screwed into the screw hole 5 of the oil pump to be tightened and fixed. The reason why the metal collar 11 is inserted into the mounting hole 8 is to prevent a decrease in the tightening force due to the creep of the resin.

[0006]

In the above-described conventional structure for fixing the reservoir tank to the oil pump, the cost is high and the method of fixing the reservoir tank is by bolts. Cannot be set to direction. (If three bolts are used at equal intervals as shown in the figure, the direction can be changed only in three directions.) Therefore, there is a problem that it is difficult to divert to other vehicle types.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides an oil reservoir tank fixing structure which is low in cost and can set the direction of a return pipe or the direction of a character on a cap to an arbitrary direction. Aim.

[0008]

According to the first aspect of the present invention, there is provided a reservoir tank fixing structure in which a resin reservoir tank 21 is mounted on a metal oil pump 20 and fixed by a tightening band 22. Oil pump 20
Is formed with an annular groove 25 for inserting an O-ring at an upper portion, and an O-ring 26 is inserted into the annular groove 25.
A reservoir tank mounting portion 24 formed in a shape of an inverted truncated cone having a tapered shape and having a smaller diameter as going downward is formed below the reservoir tank 21.
Has a cylindrical shape with an open lower portion, and the lower portion is a mounting portion 27 to the oil pump 20. The outer periphery of the mounting portion 27 to the oil pump is tapered, and the diameter decreases as it goes downward. The conical portion is provided with cuts 29 at a plurality of locations to provide flexibility, and the tightening band 22 is provided with the oil pump 2.
The outer periphery of the mounting portion 27 for the oil pump of the reservoir tank 21 fitted to the reservoir tank mounting portion 24 is tightened.

By adopting this configuration, since the mounting portion 27 of the reservoir tank 21 to the pump is fixed by the tightening band 22, the mounting direction of the reservoir tank 21 is changed, and the direction of the characters on the return pipe and the cap can be freely changed. Can be set.

According to the second aspect of the present invention, a ridge 28 and a projection 30 for preventing the tightening band 22 from being displaced are formed at an upper portion and a lower portion of a mounting portion 27 of the reservoir tank 21 to the oil pump. It is characterized by the following. By adopting this configuration, it is possible to prevent the tightening band 22 from being detached from the mounting portion 27 of the reservoir tank 21 to the pump, and it is possible to securely fix the band.

[0011]

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is an exploded perspective view and (b) is a partially enlarged sectional view. This embodiment has a reservoir tank fixing structure for mounting and fixing a resin reservoir tank to a metal oil pump, and includes an oil pump 20, a reservoir tank 21, and a tightening band 22. The oil pump 20 is made of metal, and a reservoir tank mounting portion 24 is formed on an upper portion of the main body 23. The reservoir tank mounting portion 24 has an annular groove 25 for inserting an O-ring as shown in FIG. Is formed, and an O-ring 26 is inserted into the annular groove 25. Further, a taper is provided downward from the annular groove 25, and the shape is formed in an inverted truncated cone shape having a smaller diameter as going downward.

On the other hand, the reservoir tank 21 is made of resin,
The lower part has an open cylindrical shape, and the lower part is a mounting part 27 to the oil pump 20. An annular ridge 28 is formed on the outer periphery of the upper part of the mounting part 27 to the oil pump 20. Downward from the ridge 28, the inner periphery remains cylindrical, but the outer periphery is tapered so that the diameter becomes larger as it goes downward. Note that the conical portion is cut into a plurality of locations to provide flexibility.
Are provided, and a projection 30 is formed at a lower portion between the cuts 29. In addition, ridge 2
8 and the cut 29 are formed in the annular groove 2 in a state where the reservoir tank 21 is mounted on the oil pump 20 as shown in FIG.
5 is provided below.

A cap 31 for refueling is detachably provided on the upper part of the reservoir tank 21, and characters 32 are displayed on the upper surface of the cap. A return pipe 33 is provided above the annular ridge 28.

The tightening band 22 is made of metal, and a metal member 35 for guiding the other end is provided at one end of the band 34. A worm 35 is rotatably provided on the metal member 35. The other end of the band 34 is formed with a plurality of slits 36 that mesh with the worm 35. Note that the width of the band 34 is a width that can be inserted between the protrusion 29 and the protrusion 30 of the reservoir tank 21.

FIG. 2 is a block diagram showing an embodiment of the present invention constructed as described above.
It is assembled as shown in FIG. That is, first, as shown in FIG. 1A, an O-ring 26 is inserted into the annular groove 25 of the oil pump 20, and the mounting portion 27 of the reservoir tank 21 to the pump is
That is, the tightening band 22 is loosely set between the ridge 28 and the projection 30.

Next, as shown in FIG.
The reservoir tank 21 in the reservoir tank mounting portion 24
The fitting part 27 to the pump is fitted. At this time, the lower end of the reservoir tank 21 is pushed until it hits a step 24a at the lower end of the reservoir tank mounting portion 24 of the oil pump 20.

Next, as shown in FIG.
By rotating the worm 35 and tightening the band 34, the inner surface of the mounting portion 27 of the reservoir tank 21 to the pump is brought into close contact with the outer periphery of the reservoir tank mounting portion 24 of the pump 20. With this assembly, the reservoir tank 21 does not separate from the pump 20 because the outer periphery of the reservoir tank mounting portion 24 of the pump 20 has an inverse taper. When the tightening band 22 is tightened, the mounting portion 27 of the reservoir tank 21 to the pump is provided with flexibility by the cutout portion 29, so that it is easy to bend inward.

Since it is easy to change the direction of the reservoir tank 21 before tightening the tightening band 22, it is possible to freely change the direction of the return pipe and the direction of the characters on the cap.

In the conventional reservoir tank fixing structure shown in FIG. 3, three collars are required for the reservoir tank, and the collars must be press-fitted. The pump has three screw holes and three bolt holes. However, in this embodiment, only one tightening band is required in addition to the pump and the reservoir tank, and the cost can be reduced by reducing the number of components and processing steps. Become.

[0020]

According to the reservoir tank fixing structure of the present invention, since the outer periphery of the reservoir tank mounting portion of the pump has a reverse taper, the reservoir tank mounted on the mounting portion does not come off from the pump, and is surely removed. Fixed.
Further, since the mounting portion 27 of the reservoir tank 21 to the pump is fixed by the tightening band 22, the mounting direction of the reservoir tank 21 can be freely changed,
An inexpensive reservoir tank fixing structure having versatility corresponding to a plurality of vehicle types can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is an exploded perspective view and (b) is a partially enlarged sectional view.

FIG. 2 is a diagram for explaining a mounting order of the reservoir tank according to the embodiment of the present invention.

FIGS. 3A and 3B are views showing a conventional mounting structure of an oil reservoir tank to an oil pump, wherein FIG. 3A is an exploded perspective view, and FIG.
Is a partially enlarged sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Oil pump 21 ... Reservoir tank 22 ... Tightening band 23 ... Pump body 24 ... Reservoir tank mounting part 25 ... Annular groove 26 ... O-ring 27 ... Mounting part to a pump 28 ... Ridge 29 ... Cut 30 ... Projection 31 ... Cap 32 ... letter 33 ... return pipe 34 ... band 35 ... warm 36 ... slit

Claims (2)

[Claims] 1. A resin reservoir tank (21) is attached to a metal oil pump (20), and a tightening band (2) is attached.
The oil pump (20) has an annular groove (25) for inserting an O-ring formed in an upper portion thereof, and the oil pump (20) has an O-ring (26) in the annular groove (25). ) Is formed, and a reservoir tank mounting portion (24) is formed below the annular groove (25) in the shape of an inverted truncated cone having a tapered shape and a diameter decreasing as going downward. The tank (21) has a cylindrical shape whose lower part is open, and the lower part is a mounting part (27) for the oil pump (20).
7) The outer periphery of 7) is formed in a conical shape tapered so that the diameter increases as it goes downward, and the conical portion is provided with cuts (29) at a plurality of locations to provide flexibility. The tightening band (22) is connected to the oil pump (20).
A reservoir tank (21) fitted to the reservoir tank mounting part (24), and an outer periphery of a mounting part (27) for mounting to an oil pump. 2. A projection (28) and a projection (30) are formed on an upper portion and a lower portion of a mounting portion (27) of the reservoir tank (21) to an oil pump to prevent the tightening band (22) from shifting. The fixing structure for a reservoir tank according to claim 1, wherein