JP2588226Y2 - Electromagnetic pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic pump of the type used, for example, for fueling automobiles, and more particularly to a clamp structure for a lead wire drawn out of the housing of the electromagnetic pump.

[0002]

2. Description of the Related Art Electromagnetic pumps of this type are used outside an automobile,
In particular, since it is often mounted under the floor and water and mud easily adhere to the vehicle during traveling, the joints of the pump housing and the like constituting the outer portion of the electromagnetic pump are required to be highly waterproof. This is because an electric chamber in which the excitation coil, the transistor, the printed circuit board, and the like are arranged is formed in the pump housing.

[0003] As this kind of electromagnetic pump, one taking measures to satisfy the above-mentioned waterproof function has been proposed.
For example, Japanese Utility Model Publication No. 57-50542 and Japanese Utility Model 4-2
Various proposals have hitherto been made, such as the publication No. 9091.

A problem with the electromagnetic pump having the above-described structure is handling of a lead wire drawn out of the pump housing. That is, conventionally, generally, the lead wire is only drawn out from the inside of the housing of the pump, and no consideration is given to the clamping of the lead wire.

[0005] However, in such a case, if the electromagnetic pump and its fixed part vibrate under vibration conditions like an electromagnetic pump mounted on a vehicle and an excessive deflection of the lead wire occurs, the lead breaks. Will be invited. In particular, at the lead-out portion of the lead wire from the inside of the pump, problems such as damage and disconnection are likely to occur due to the influence of runout.

For this reason, a structure is adopted in which a part of a lead wire drawn from such a pump is held by a clamp, and the clamp is fixed to a pump housing or the like by screwing or welding. Has conventionally been generally performed.

[0007]

However, according to the conventional structure described above, a clamp for holding the lead wire and fastening means such as bolts and nuts for fixing the clamp to the pump housing are required, and the bolts and the like are fixed. For this purpose, a jig or the like is required, the number of parts is large, and there is also a problem in terms of mounting. Of course, when fixing by welding or the like, the work is troublesome and complicated, and the mounting property is poor.

Further, if the clamp or the like is made of metal, a problem of falling off due to generation of rust or the like occurs, which is a problem in terms of durability. Further, if the clamp swings at the screwed portion by the bolt, the lead wire may be pulled, leading to a problem that the lead may be cut off at the lead withdrawal portion from the pump. It is desired to take some measures that can be wiped out.

The present invention has been made in view of such circumstances, and it is possible to easily prevent a lead wire drawn from a pump housing from swinging under vibration conditions and causing a break in a lead particularly at a drawn portion from the housing. It is an object of the present invention to obtain an electromagnetic pump which can be prevented by a method, has a simple structure, is excellent in workability in mounting, and is configured to reduce costs.

[0010]

SUMMARY OF THE INVENTION In order to meet the above-mentioned demands, an electromagnetic pump according to the present invention uses a lead wire drawn out of a pump housing in a saddle-shaped pump fixing bracket fixed to an outer surface of the housing. Hold it in the holding groove formed on the inner surface of the clamp bush that is removably inserted and fixed to the left and right sides of the rising portion on both sides, and between this and the base fixed to the housing outer surface of the bracket. That is, it is configured to be sandwiched and held.

[0011]

According to the present invention, the lead wire drawn from the pump is held in the holding groove formed on the inner surface of the clamp bush, and this bush is fixed to the outer surface of the pump housing. The lead wire is sandwiched between the holding groove on the inner surface of the bush and the base of the bracket by being detachably inserted into the left and right rising portions of the saddle-shaped pump fixing bracket from the end. It can be inserted and held.

[0012]

1 to 3 show an embodiment of an electromagnetic pump according to the present invention. In these drawings, only the main part is shown, and the internal structure of the pump is specifically shown in FIG. Description is omitted. In addition, as such an electromagnetic pump 1, for example, the appearance of a simplified type proposed by Japanese Utility Model Application Laid-Open No. 61-70581 or the like is illustrated, but the present invention is not limited to this. Needless to say, a well-known cylindrical type or square type may be used.

Here, an electromagnetic pump, generally designated by the reference numeral 1, comprises a pump housing 2 comprising a cup-shaped housing main body 2a and a disk-shaped lid 2b which is assembled and fixed by caulking or the like so as to cover the opening end thereof. Center of bottom of main body 2a, lid 2
Pipe bodies 3a and 3b extending outward from the center of b and forming fluid outlets and inlets are fixed by brazing or the like. In the pump housing 2, components constituting the pump movable section, electric components for controlling the pump movable section, and the like are incorporated and arranged at appropriate positions to function as the electromagnetic pump 1.

In the pump housing 2 described above, a lead wire 4 for making an electrical external connection is provided from a part of the joint between the housing body 2a and the lid 2b with a suitable sealing means interposed. Have been withdrawn. Further, a part of the outer peripheral surface of the housing main body 2a of the pump housing 2 has a substantially saddle-shaped pump fixing portion for fixing the pump 1 to a fixing portion (not shown) on a mounting side of a vehicle body or the like. Bracket 5 is fixedly attached by welding or the like.

According to the electromagnetic pump 1 of the present invention, the lead wire 4 drawn out of the pump housing 2 is provided.
As is clear from FIGS. 1 to 3, the housing body 2
a With respect to the left and right rising portions 6 and 6 of the saddle-shaped pump fixing bracket 5 fixed to the outer side surface,
It is held in a holding groove 11 formed in an inner surface of a clamp bush 10 which is detachably inserted and fixed, and is held between a base 5a fixed to the outer surface of the housing main body 2a of the bracket 5 by being clamped. The feature is that it is configured to hold.

Here, the pump fixing bracket 5 has a base portion 5a formed of a curved surface fixed to the housing 2 side, and substantially L-shaped rising portions 6, 6 from both left and right sides thereof. The pump 1 is formed in a substantially saddle-shaped configuration including mounting pieces 7, 7 for mounting and fixing the pump 1 to a fixing portion. In the drawing, reference numeral 7a denotes a screw hole of a fixing screw to the fixing portion.

The clamp bush 10 is formed as a molded product from a resin material or a rubber material. The bush 10 is interposed between the left and right rising portions 6 and 6 on the base 5a of the bracket 5. And a resilient piece 1 which is arranged side by side on one side and connected to one end side to form slit grooves 12a, 12a into which the left and right rising portions 6, 6 of the bracket 5 enter.
2, 12, and locking projections 13, 1 locked on the free insertion side of the bracket 5 at the free ends of the elastic pieces 12, 12.
3 and the like.

The clamp bush 10 having such a configuration is fixed to the bracket 5 provided outside the housing 2 by being inserted into the bracket 5 from the end shown by the arrow in FIG. In this assembled state, the main body 10a is interposed between the left and right rising portions 6, 6 at the base 5a of the bracket 5, and
By holding the left and right rising portions 6 and 6 between the left and right elastic pieces 12 and 12, and being hooked by the locking projections 13 and 13 on the distal end side of the elastic pieces 12 and 12, The escape is regulated and the assembly is held.

According to such a configuration, the lead wire 4 drawn from the pump 1 is connected to the clamp bush 10.
The bush 10 is held in the holding groove 11 formed on the inner surface of the pump housing 2 and the left and right rising portions 6, 6 of the saddle-shaped pump fixing bracket 5 fixed to the outer surface of the pump housing 2. As is clear from FIG. 2, the lead wire 4 is detachably inserted from the end direction and fixed, thereby connecting the lead wire 4 to the holding groove 1 on the inner surface of the bush 10.
1 and the base 5a of the bracket 5 so as to be held therebetween.

In such a configuration, it is possible to prevent the lead wire 4 pulled out from the pump housing 2 from swinging under the vibration condition and causing the lead to be broken particularly at the drawn portion from the housing 2 by a simple method. Moreover, the structure is simple, the mounting workability is excellent, and the cost can be reduced.

In particular, such a bush 10 can be assembled and fixed in a detachable state by a simple insertion operation after assembling of the pump 1, and is excellent in workability. It can be maintained. A bush 10 made of such a resin material or rubber material
When the lead wire 4 is held by the
It can be performed extremely easily, including assembling work, and can greatly improve workability. Further, such a bush 10 is excellent in durability in that there is no possibility of causing a problem of falling off due to generation of rust or the like as in the case of a conventional metal clamp.

Further, the bush 10 according to the present invention described above.
According to this, since the bracket 5 functions as a spacer in the space between the left and right rising portions 6, 6, the bracket 5 can serve as a reinforcing material,
Furthermore, no special mounting space is required, and the pump is small and compact.
The pump housing 2 can be made compact, and the lead wire 4 can be held in a required state at a position close to the lead lead-out portion in the pump housing 2. Therefore, even if it is subjected to excessive vibration, there is no problem such as lead breakage.

It should be noted that the present invention is not limited to the structure of the above-described embodiment, and it is needless to say that the shapes, structures, etc. of the respective parts of the electromagnetic pump 1 can be freely modified and changed, and various modifications are possible. . Also, as the shape of the bracket 5 for fixing the pump, the shape of the bush 10, and the like, appropriate modifications can be considered.

[0024]

As described above, according to the electromagnetic pump of the present invention, the lead wire drawn out of the pump housing is connected to both the left and right sides of the saddle-shaped pump fixing bracket fixed to the outer surface of the housing. The clamp is held in a holding groove formed on the inner surface of the clamp bush, which is detachably inserted and fixed to the rising portion of the bracket, and is sandwiched between the base and the base fixed to the outer surface of the housing of the bracket. Despite the simple structure with the minimum required number of parts, the lead wire drawn out of the pump housing oscillates under vibration conditions, especially when the lead wire is pulled out from the housing. Can be easily and reliably prevented, the reliability in pump operation can be maintained, and the mounting workability is also excellent. Strike reduction, affords a practically various excellent effects such as improved.

In particular, according to the present invention, the lead wire drawn from the pump is held in a holding groove formed on the inner surface of a clamp bush formed of a resin material or a rubber material. The lead wire is detachably inserted from the end direction to the left and right rising portions of the saddle-shaped pump fixing bracket fixed to the outer surface of the pump housing, and the lead wire is connected to the inner surface of the bush. Can be held between the holding groove of the bracket and the base of the bracket, so that the lead wire can be held in the required state by simple assembly work, eliminating the problem of lead breakage under vibration conditions. What you get.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of an electromagnetic pump according to the present invention, in which a lead wire clamping portion serving as a main portion is viewed from the outer appearance of the pump.

FIG. 2 is a schematic exploded perspective view showing an essential part in FIG. 1 in an exploded manner.

FIG. 3 is a schematic perspective view in which a part of the pump is viewed from a different direction from FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic pump 2 Pump housing 4 Lead wire 5 Pump fixing bracket 6 Left and right rising parts 7 Mounting piece 10 Clamping bush 10a Base 11 Holding groove 12 Elastic piece 12a Slit groove 13 Locking projection

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F04B 17/04 F04B 53/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A pump housing containing a pump operating part and a control electric part thereof, a lead wire drawn out of the housing, a base fixed to an outer surface of the housing, and a left side and a right side of the base. A substantially saddle-shaped pump fixing bracket composed of mounting pieces provided through a letter-shaped rising portion for mounting and fixing the pump to the fixed portion, and gripping the pump fixing bracket from the outside with respect to the left and right rising portions. A clamp bush that is removably inserted from the end so as to be interposed between the left and right rising portions. The clamp bush is fixed to the inner surface of the clamp bush for holding the lead wire. A groove is formed, and the lead wire is held in the holding groove by pressing and assembling on the base of the bracket while holding the lead wire. Electromagnetic pump which is characterized by being configured to fix and hold at ring outside.