JP3433669B2 - Reserve tank for oil pump - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a nipple portion forming a connecting portion of a reserve tank for an oil pump to a pump suction port, and more particularly to a seal ring provided at a tip portion of the nipple portion. The present invention relates to a mounting structure for the holding collar.

[0002]

2. Description of the Related Art A conventional method for connecting a reserve tank for an oil pump to a pump suction port is as shown in FIG.
An annular groove 130 is provided at the tip of the nipple portion 110 of the reserve tank 10 integrally formed of a synthetic resin member, and a rubber seal ring 30 is attached to the groove 130. The oil suction port (suction port) 5 provided with such a nipple portion 110 in the pump housing 50 or the like.
It is formed by inserting it at 50 and further connecting the reserve tank 10 and the pump housing 50 with each other by a separately provided fastening means.

[0003]

By the way, in the case of such a structure, if the reserve tank 10 is made of a synthetic resin material and is integrally molded by injection molding means, etc. Molding burrs (burrs) as shown in FIG. 7 are formed at the mating surface. Then, there is a problem that it is difficult to maintain liquid-tightness on the surface of the seal ring 30 that comes into contact with the portion where the burr is generated. In order to solve such a problem, it is considered that the mold matching surface at the time of molding the reserve tank is prevented from coming in contact with the contact surface of the seal ring at the nipple portion, that is, a mold composed of upper and lower molds. However, if such an up-down type method is adopted, it becomes impossible to use the groove 130 in which the seal ring 30 is installed as a recess groove. So in this case,
As shown in FIG. 8, at the tip of the nipple portion 110, an annular stepped portion 150 opened downward.
Must be provided, and the collar 20 having the flange portion 230 for holding the seal ring must be attached thereto. In this case, it is necessary to take measures to prevent the collar 20 from coming off. In order to solve such a problem, it is an object (problem) of the present invention to provide an oil pump reserve tank in which a predetermined retaining means is provided on a collar.

[0004]

In order to solve the above-mentioned problems, the following measures are taken in the present invention. That is, according to the first aspect of the present invention, regarding a reserve tank which is made of a synthetic resin member and integrally has a nipple portion forming a connecting portion to the suction port of the oil pump, the maximum of the nipple portion is provided. A stepped portion having a predetermined depth is provided at the tip end portion over the entire circumference of the outer peripheral portion, and a seal ring is installed at the stepped portion, and the seal ring thus installed is held. and has a flange portion formed so as to, have a cylindrical portion provided with the slit having a predetermined width be one that is inserted into the inside diameter portion side in the axial direction of the nipple portion, further, such cylinder At the tip of the part
At the side opposite to the side where the above flange is provided
In addition, it prevents the cylindrical portion from falling off from the nipple portion.
The collar having the engaging portion thus formed is provided at the tip of the nipple portion.

By adopting such a structure, the present invention has the following effects.
That is, since the mold matching surface of the reserve tank according to the present invention is generally set at the base of the nipple portion or the like, there is no burr formed at the time of injection molding where the seal ring is mounted. It will not happen. As a result, the liquid tightness of the seal ring portion is maintained, and the sealability is improved. Further, the collar for holding such a seal ring is formed by pressing the cylindrical portion of the collar into the inner diameter side of the nipple portion.
Although it is designed to be held at the tip of the nipple portion, a slit is provided at the cylindrical portion of the collar according to the present invention, and by the action of this slit, A too large force (load) is not applied to the nipple portion. As a result, it is possible to avoid damage to the nipple when the collar is attached.

Further, when the reserve tank in which the seal ring is held in this manner is attached to the oil pump for use, the collar is made of a metallic material. , The collar provided at the nipple portion may thermally expand due to the temperature rise of the oil, etc., but due to the action of the slit provided in the cylindrical portion, the nipple portion made of the synthetic resin material may not be much A large force (load) will not be applied. That is, no large stress is generated in the nipple portion. As a result, it is possible to prevent damage such as cracking in the nipple portion.

[0007] Further, in the present invention, the tip of the nipple portion
Use the collar at the end of one of the cylindrical parts.
The end of the flange for holding the seal ring
On the side opposite to the side where the
Locking part to prevent falling off from the nipple part
To have. By adopting such a configuration
In the present invention, the collar cylindrical portion and the nip are
Keep the fitting state between the inner part of the
To completely prevent the collar from falling off the nipple.
Will be able to That is, according to the present invention
The collar is claw-shaped or at one end of the cylinder
Since it has a flange-shaped locking part, this locking
Part is at the base of the nipple part
Link to the wall of the
Depending on the relationship, the collar is fixed to the nipple
Become. In addition, the seal ring can also be
It will be retained at the end. Also like this
In addition, the collar itself is fixed to the nipple part by the locking part
Therefore, the cylindrical part and the nipple part inner diameter part
The engagement state (fitting state) can also be set loosely.
It may cause cracks (damage) in the nipple.
Will be able to prevent.

[0008] Next, the invention according to claim 2 will be described.
It Also in this case, the basic point is the above-mentioned claim 1.
It is the same as the one. The feature is that the color
A step provided on the pump inlet at one end
A stopper that engages with the hole is provided,
When the tank is attached to the oil pump, the collar
This is to prevent it from getting out of the pluck part. Sanawa
The oil pump that is made of synthetic resin
The nipple that forms the connection to the suction port
Regarding the reserve tank that we have, the tip of the above nipple part
At the end, a stepped part with a predetermined depth is
Along with the entire circumference of the peripheral part,
A seal ring was installed there, and it was installed like this
The flange part that is formed to hold the seal ring
Or flange part,
Is provided continuously at the turn-back portion, and
Interlocks with the stepped hole formed in the suction port of the IL pump
It has a stopper part that is formed so that
Cylindrical shape that is inserted on the inner diameter side of the nipple
A collar having a cylindrical portion of the form
Adopt a configuration that is provided at the tip of the part
And

[0009] By adopting such a configuration, the present invention
For the above, the collar for holding the seal ring
However, when installing the reserve tank to the oil pump,
And remove it from the nipple of the reserve tank.
You will be able to prevent falling off. Sanawa
Then, the nipple part was inserted (installed) into the suction port of the pump.
In the state, it was provided at the tip of the collar
The stopper is a step provided at the suction port of the pump.
It will come into contact with the attached hole and will not move. That conclusion
The vibration from the fruit, oil pump, etc. causes the above-mentioned reserve tank.
Even if it is propagated to
Does not fall out of the pluck part.

[0010] Next, the invention according to claim 3 will be described.
It Also in this case, the basic point is the above-mentioned claim 2.
It is the same as the one. The characteristic of the present invention is claim 2.
In the reserve tank for the oil pump described, the nip
The collar provided at the tip of the
Part is formed along the axial direction of the cylindrical part.
The slit has a predetermined width.
That is. By adopting such a configuration, the present invention
In the case of the above, mounting the collar to the nipple part is
The operation is more reliable and the slit action
Therefore, unnecessary force is not applied to the nipple part.
As a result, damage such as cracks in the nipple part has not occurred.
It will be possible to prevent it. Also in the color
Provide some elasticity between the cylindrical part and the inner diameter side of the nipple part.
It will be possible to mate it with the
Temporarily fix the collar at the tip of the nipple.
You will be able to keep it. As a result,
With the seal ring and collar attached to the pull section,
It is possible to carry the reserve tank in the assembled state.
To the oil pump of the reserve tank.
The workability of mounting can be improved.
Like In addition, this reserve tank in such a state
The nipple part of the is installed at the inlet of the oil pump.
In the closed state, the stopper will
Prevents the collar from coming off by engaging with the stepped hole provided in the roller.
The fact that it is stopped is the same as in claim 2 above.
is there.

[0011] Next, the invention according to claim 4 will be described.
It Also in this case, the basic point is the above claim 2 or
It is the same as that of claim 3. Its features
The bottom of the nipple of the reserve tank.
The collar to be installed is the nip at the cylindrical part.
So that a clearance fit with the inner diameter of the
That is. By adopting such a configuration, the present invention
In the case of the
On the other hand, the insertion of the collar may prevent damage such as cracking.
You will be able to prevent it. I.e. the book
In the invention, the nipple portion of the reserve tank is
When installed on the suction port of the pump,
Stopper provided at the tip is provided at the suction port of the pump
This collar will not fall off by engaging with the mounting part
become. Therefore, as described above, the inner diameter of the nipple and the cover
The state of engagement with the cylindrical part of the
So that unnecessary force (stress) is not applied to the nipple.
Can be As a result, the split at the nipple
It becomes possible to prevent such occurrences.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. Although it is related to the present embodiment, its configuration is made of a synthetic resin material as shown in FIG.
A reserve tank 1 integrally formed by injection molding means and the like together with the nipple portion 11 and the oil pump 5 to which the reserve tank 1 is mounted via a mounting bracket 6 and predetermined fastening means 7 and the like. It is based on that. In such a basic structure, the nipple portion 11 of the reserve tank 1 is inserted (installed) into an oil suction port (suction port) 51 provided in the housing of the oil pump 5 or the like.
Then, the hydraulic oil from the reserve tank 1 is transferred to the pump 5
It is intended to be supplied to. In addition, in order to maintain liquid tightness at the connecting portion between the reserve tank 1 and the oil pump 5 as described above,
A seal ring 3 composed of an O-ring or the like is attached.

The reserve tank 1 having the nipple portion 11 having the above-mentioned structure is integrally molded by injection molding means or the like.
The mating surface of the mold in that case is the AA surface that is the connecting portion between the reserve tank body and the nipple portion 11 (see FIG. 1).
And the like. As a result, burr (molding burr) does not occur at the stepped portion 111 of the nipple portion 11 which is the mounting surface of the seal ring 3. Therefore, in the case of such a die structure, it is difficult to provide a recessed recess groove in the place where the seal ring 3 is attached for the sake of convenience of die removal. A stepped groove that is open to the side is adopted. That is, at the most distal end of the nipple portion 11, an annular stepped portion 111 is provided over the entire circumference of the outer peripheral portion. Then, with the seal ring 3 attached to the annular stepped portion 111, the metal collar 2 is further attached.
Further, the flange portion 23 provided on the collar 2
The seal ring 3 is held on the outer peripheral portion of the nipple portion 11.

Next, the metal collar 2 provided at the tip of the nipple portion 11 having such a structure will be described below. First, as shown in FIGS. 2 and 3, the first embodiment is provided with a cylindrical portion 21 inserted into the inner diameter side of the nipple portion 11 and one end of the cylindrical portion 21. The flange portion 23, which plays a role of holding the seal ring 3 attached to the stepped portion 111 of the nipple portion 11, and the cylindrical portion 21 have a predetermined width in the axial direction thereof. And a slit 22 provided in this state. In addition,
In such a structure, the slit 2
2 is provided at least at the cylindrical portion 21. Such a slit 2
By providing 2 to the cylindrical portion 21,
It becomes possible to reduce the surface pressure applied to the nipple portion 11 when the nipple is fitted into the inner diameter side of the nipple portion 11 by the press-fitting means or the like, and the damage to the nipple portion 11 or the like is prevented in advance. You will be able to. Further, even when the collar 2 expands due to the temperature rise of the oil when the oil pump 5 is in operation, this thermal expansion can be absorbed at the slit 22 and the nipple portion 11 is cracked. It becomes possible to prevent the occurrence of

Next, the second embodiment will be described with reference to FIGS. 4 and 5. This one also has the same basic points as the one according to the first embodiment. The difference is that, in addition to that of the first embodiment, a stopper portion 25 formed of a large diameter portion is provided continuously from the flange portion or the folded portion 23 to the flange portion or the folded portion 23. That is. The tip of the stopper portion 25 is adapted to engage with the stepped hole 55 provided at the suction port 51 of the oil pump 5.
Therefore, a reserve tank 1 having such a color 2
When the nipple portion 11 is inserted into the suction port 51, the collar 2 does not fall downward. As a result, the outer diameter of the cylindrical portion 21 is made smaller than the inner diameter of the nipple portion 11, and the cylindrical portion 21 and the nipple portion 1 are
It becomes possible to fit the gaps 1 and 1, and there is no possibility of damaging the nipple portion 11 due to the insertion of the collar 2. In addition, the collar 2 having such a stopper portion 25
Examples thereof include those having a flange portion 23 formed by press working means or the like as shown in FIG. 4, or those having a folded portion 23 formed by bulge processing means or the like as shown in FIG. To be Further, in the case of having the stopper portion 25 having such a structure, as shown in FIG. 4, it may be considered that the slit 22 is provided at the cylindrical portion 21. By providing such a slit 22, the state of mounting the nipple portion 11 on the inner diameter portion can be made an interference fit state, and when the reserve tank 1 is pulled out from the pump suction port 51, the collar 2 and the seal ring 3 are removed. It is possible to prevent the falling off, and it is possible to improve the workability during maintenance work or the like.

Next, a third embodiment will be described with reference to FIG. The basic point of this device is also the same as that of the first embodiment or the second embodiment. The difference is that, in addition to those, the locking portion 24 having a claw-like or flange-like shape is provided at the end portion on the side opposite to the end portion on the side where the flange portion 23 of the cylindrical portion 21 is provided. Is to be provided. Then, the locking portion 24 is engaged with the base portion on the inner diameter side of the nipple portion 11 and the wall 112 of the reserve tank body. By performing such engagement, the collar 2 is completely prevented from falling off. Therefore, it becomes possible to carry the reserve tank 1 with the seal ring 3 or the like, that is, in the state of the reserve tank assembly, to attach the reserve tank assembly to the oil pump, or to install the reserve tank assembly around the reserve tank. It becomes possible to improve the workability of maintenance work. In each of the above-described embodiments, the metal collar 2 is used, but the invention is not limited to such a metal collar. For example, synthetic resin may be used as long as it satisfies predetermined conditions regarding heat resistance, static or dynamic strength, elasticity, etc. when used in a reserve tank for an oil pump.

[0017]

According to the present invention, a reserve tank, which is made of a synthetic resin member and integrally has a nipple portion that forms a connection portion to the suction port of an oil pump, has a maximum nipple portion. A stepped portion having a predetermined depth is provided at the tip end portion over the entire circumference of the outer peripheral portion, and a seal ring is installed at the stepped portion, and the seal ring thus installed is held. A collar having a flange portion formed so as to be inserted into the inner diameter side of the nipple portion and having a cylindrical portion provided with a slit having a predetermined width in the axial direction is provided at a tip portion of the nipple portion. Since it is designed to be installed in place, it does not cause burrs formed at the time of injection molding where the seal ring is installed. Will be able to, liquid-tightness of the seal portion is maintained, it has become possible to improve the sealability.

Further, since the collar holding such a seal ring is provided with the slit at the cylindrical portion of the collar, the action of the slit causes the slit to be provided at the nipple portion. I didn't apply too much force. As a result, it has become possible to avoid damage to the nipple when the collar is attached. Further, when the oil pump is in operation, if the collar is made of a metallic material, the collar provided at the nipple portion will thermally expand due to the temperature rise of the oil, etc. Due to the action of the slit provided in the portion, a large force is not applied to the nipple portion made of a synthetic resin material, and damage (cracking) or the like of the nipple portion can be prevented.
Also, in the case where a stopper part consisting of a large diameter part is provided at the lower part of the flange part continuously with the flange part, when the nipple part is inserted at the suction port of the pump, Dropout (dropout)
Can be prevented. Further, in the case where the locking portion is provided on the side of the cylindrical portion opposite to the side where the flange portion is provided, the action of the locking portion can completely prevent the collar and the seal ring from falling off. I can do it now. As a result, the workability of maintenance work around the reserve tank can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of the present invention.

FIG. 2 is a vertical cross-sectional view showing a first embodiment of a collar forming a main part of the present invention.

FIG. 3 is a plan view showing a first embodiment of a collar forming a main part of the present invention.

FIG. 4 is a cross-sectional view showing a mounting state of a collar according to a second embodiment of a collar forming a main part of the present invention.

FIG. 5 is a vertical cross-sectional view showing a second embodiment of a collar forming a main part of the present invention.

FIG. 6 is a cross-sectional view showing a mounted state of a collar according to a third embodiment of a collar forming a main part of the present invention.

FIG. 7 is a diagram showing an overall configuration of a conventional example having a recess groove in a nipple portion.

FIG. 8 is a cross-sectional view showing an overall configuration of a conventional example having a collar for holding a seal ring.

[Explanation of symbols]

1 reserve tank 11 Nipple part 111 Stepped part 112 walls 2 colors 21 Cylindrical part 22 slits 23 Flange part (folded part) 24 Locking part 25 Stopper 3 seal ring 5 pumps (oil pumps) 51 Intake port (oil intake port) 55 Stepped Hole 6 Mounting bracket 7 fastening means

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Hasegawa 1-1 Asahi-cho, Kariya city, Aichi Toyota Koki Co., Ltd. (56) References: Kaikaihei 7-37860 (JP, U) −14628 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 17/00 B62D 5/07 F16L 21/00

Claims (4)

(57) [Claims] 1. A synthetic resin member, comprising:
In a reserve tank that integrally has a nipple portion that forms a connection portion to the suction port of an oil pump, a stepped portion having a predetermined depth is provided at the most distal end of the nipple portion, and the entire outer peripheral portion thereof is provided. The seal ring is provided at the stepped portion while being provided over the circumference, and has a flange portion formed to hold the seal ring thus installed, and is inserted into the inner diameter portion side of the nipple portion. have a cylindrical portion provided with the slit having a predetermined width in the axial direction a shall, furthermore, such a cylindrical portion
Side where the flange is provided at the tip
On the side opposite to the nipple part of the cylindrical part.
A reserve tank for an oil pump, characterized in that a collar having a locking portion formed so as to prevent the oil pump from falling off is provided at a tip portion of the nipple portion. 2. A synthetic resin member,
In a reserve tank that integrally has a nipple portion that forms a connection portion to the suction port of an oil pump, a stepped portion having a predetermined depth is provided at the most distal end of the nipple portion, and the entire outer peripheral portion thereof is provided. In addition to being provided over the circumference, a seal ring is installed at the stepped portion and has a flange portion or a folded portion formed so as to hold the seal ring thus installed, and the flange portion or the folded portion It is provided continuously and has a stopper portion formed so as to engage with a stepped hole formed in the suction port of the oil pump, and is further inserted on the inner diameter side of the nipple portion. And a collar having a cylindrical portion having a cylindrical shape is provided at the tip portion of the nipple portion. Reserve tank for-pumped. 3. A reserve tank for an oil pump according to claim 2, wherein a collar provided at a tip portion of the nipple portion is formed at a cylindrical portion along the axial direction of the cylindrical portion. A reserve tank for an oil pump, characterized by having a slit having a predetermined width. 4. The reserve tank for an oil pump according to claim 2 or 3, wherein the collar provided at the tip of the nipple has a gap at the cylindrical portion with respect to the inner diameter of the nipple. A reserve tank for an oil pump, which is characterized by being fitted.