JPS5919840Y2 - Removable closure device for pump casings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a removable closure device for pump casings, in particular for washing machine pumps.

The casing of the device includes a cylindrical extension of the pump casing, a cover and an annular surface against which the cover is sealed.

The casing of the washer pump must be easily accessible.

The reason for this is that small solid objects such as textile fibers, buttons, pins, paper clips, the like, etc., are carried by the water during draining the aquarium and usually accumulate off the pump casing or collect around the pump vanes. It is as it is.

This greatly reduces pump efficiency and may even lead to failure.

The pump casing must therefore be cleanable.

A number of solutions have been proposed to make this cleaning possible for unskilled operators, especially those using domestic washing machines.

For example, there is a method of placing a filter upstream of the pump, but the cost of the filter cannot be ignored.

Additional Patent No. 707 of French Patent No. 1123343
No. 44 proposes a method of fixing the cover to the pump casing using transverse pieces.

The ends of the transverse section are held by two hooks on the cylindrical extension of the pump casing.

Such a device makes it possible to easily open the pump casing, but has the disadvantage that when the pump is installed in a horizontal position and the water tank still contains water, it is impossible to stop the discharge of this water. have.

When the cover is loosened, the transverse piece is freed to some extent and is then unhooked, thus opening the pump opening completely.

If it is completely opened, it may become flooded.

The present invention solves the above-mentioned problems and includes a closure member, the closure member having a surface consisting of at least three parts, two parts of the surface being annular segments, and the closure member having at least a three-part surface; The annular segments are spaced apart from each other and lie in parallel planes, the third part being a helical part joining the other two parts to each other and cooperating with the closing part. The ridge is characterized in that it has a cam surface that is movable relative to said surface.

An advantageous embodiment of the invention is characterized in that the first closure element is arranged on the cylindrical surface of the cover and the second closure element is arranged on the inner surface of the extension of the pump casing.

Furthermore, it is advantageous if the annular segment of the three-part surface furthest from the pump interior is provided with at least one projection or receptacle extending away from said interior.

In a preferred embodiment, the design of the closure device consists of two members interconnected such that the cover can freely rotate with respect to each other, one member designed to seal against the annular surface of the casing, and The other member is provided with a closure member.

Finally, an advantageous embodiment is characterized in that the pump casing is provided with a water outlet in the form of a local extension.

The present invention will be described below with reference to embodiments and the accompanying drawings.

Referring first to FIG. 1, a washing machine pump and an electric motor driving it are shown in partial section.

The pump casing 8 of this pump is firmly attached to the motor 10.

Fixing and sealing of these two parts is done by known means.

The plate 12 divides the pump casing 8 into two chambers, a suction chamber 5 and a pumping chamber 6.

The pumping chamber accommodates an impeller 7 directly connected to the motor shaft.

A water inlet pipe opens into the suction chamber 5 and a water outlet pipe (not shown) opens into the pumping chamber 6.

Both the water inlet and outlet are oriented tangentially to the pump casing.

On the side remote from the pumping chamber 6, the suction chamber 5 is provided with a cylindrical extension 1, the diameter of which is slightly larger than the diameter of the suction chamber 5.

Regardless of the shape of the pump casing, a cylindrical member with an annular section 4 or a conical section is always connected to said pump casing.

The cylindrical extension 1 can receive a cover consisting of two cover parts 2 and 3, said cover parts 2 and 3 cooperating with a closure ring 3 disposed along the circumference of the cover part 3.
The ring 30 is tightened between the cover part 3 and the annular part 4, which provides leaktightness with the help of the ring 30.

The wall of the casing 8 and the cylindrical extension 1 form an integral unit made by injection molding or casting of plastic material or metal.

A cross-sectional view taken along line A--A in FIG. 2a (FIG. 2b) shows the means for axially moving the cover.

The ridge 11 formed on the inner surface of the cylindrical extension 1 has the shape of two cylindrical segments cooperating with a closure member 15 formed on the cover part 2 (FIG. 3a).

The raised portion 11 extends along the circumferential portion of the cylindrical extension 1 .

The distance from the annular part 4 to the ridge 11 is such that when the closure parts 15 of the covers 2, 3 cooperate with these ridges 11, the ring 30 is clamped between the cover part 3 and the annular part 4. ing.

Alternatively, the raised portion 11 is formed on the cover member 2;
A closure member 15 may be provided on the cylindrical extension 1 .

As mentioned above, the cover includes cover member 2 (part 3a).

(Fig. d) and a cover member 3 (Fig. 48, 4b).

The cover part 2 has a cylindrical portion 16 (FIG. 3d).

One of the interfaces of this cylindrical part has a flange 17;
The other interface has a closure member 15 with a closure in the form of two annular segments 152 and 153, said annular segments lying in two parallel planes at right angles to the axis of the cover.

A helical portion 151 connects the two adjacent ends of annular segments 152 and 153 so that 151, 152 and 1
The three parts 53 form a clamping surface.

Annular segment 152 not connected to helical portion 151
is provided with a receiving part 154, which receives the raised part 1.
1 (Fig. 2b).

At the point where the helical portion 151 connects with the annular segment 152, a protrusion 155 is arranged, which has a small height but is able to move over the protuberance 11 and exert pressure on the ring 30 (FIG. 1) at the same time. It's a good size and well made.

Annular segment 152, receiving portions 1 and 54, and protruding portion 155
A reliable locking is obtained when the ridges reach in front of the protuberances 11 on each side.

Said lock can only be released by applying an axial force and simultaneous rotation.

Machine vibrations have no total thermal impact on this closure.

The closing member 15 of the cover member 2 is tightened by three spiral portions 151. Annular segment) 152 and 153 are captured and tightened in a wedge-like manner by the rear side (end face on the suction chamber side) of the casing protrusion 11 (end face on the suction chamber side), that is, the cam surface, by turning the cover member 2 like an insertion stopper. It will be done.

In this embodiment, the closure device has two diametrically opposed closure members 15.

However, alternatively the device can be provided with a number of closure members along the circumference.

The handle 18 of the cover part 2 has a shape such that the pin can also extend through the hole 13 formed in the wall of the cylindrical extension 1 .

The wall 19 of the cover part 2 has four resilient clamping members 2 which can cooperate with the cylindrical part 21 of the second cover part 3 (FIG. 4b).
0 (Figure 3C).

For said cooperation purpose, the cover part 3 further comprises a rim 22.

The cover member 3 has two notches 23 and 24 (FIG. 4a) through which the raised portion 11 (FIG. 2b) passes.

The cover member 2 engages the cover member 3 so that the pressure on the ring 30 is evenly distributed.

When the cover member 2 is rotated, the cover member 3 does not follow this rotation and therefore no torsional force is applied to the ring 30.

According to the configuration of the present invention, the cover member 2 is moved from the fully tightened position where the annular segment 152 is on the cam surface of the rear side of the raised portion 11 to the position where the annular segment 153 is on the cam surface of the rear side of the raised portion 11. When the cover member 2 is turned, some tightening is still in effect in the latter position, so that the cover member 2
is not pushed away by water even if the tank is filled with water.

Only when the cover part 2 is further rotated in the removal direction will the cover part 2 be completely removed.

This therefore provides a type of safety device hitherto unknown, and has the advantage of being extremely simple and reliable in operation.

The pump is housed in an easily accessible space of the machine, for example near the front of the machine.

The cylindrical extension 1 of the elongated pump casing is delimited externally by a surface which does not extend at right angles to the axis of the suction chamber, the longer generatrix of said cylindrical extension being defined by the lower surface 1
4 (Fig. 2a) and is configured to form a drainage section.

[Brief explanation of the drawing]

1 is a sectional view of a pump equipped with a closure device according to the invention; FIG. 2a is a longitudinal sectional view of the casing of this pump;
Figure b is a cross-sectional view of this pump casing taken along line A--A in Figure 2a, Figure 3a is a side elevational view showing one part of the two-part cover, and Figure 3b is a side elevational view of this cover. FIG. 3C is a rear elevational view of the cover member; FIG. 3D is a sectional view of the cover member; FIG. 4A is an elevational view of the other cover member; Figure 4b is a sectional view of this cover member. 1... Cylindrical extension part, 2... Cover member, 3...
Cover member, 4... Annular portion, 5... Suction chamber, 6...
... Pumping chamber, 7... Impeller, 8... Pump casing, 10... Motor, 11... Protrusion, 13...
Hole, 14... Lower surface, 15... Closure member, 151
... Spiral portion, 152.153 ... Annular segment, 154 ... Receiving portion, 155 ... Projection portion, 18 ...
Handle, 19... Wall, 20... Elastic tightening member, 21.
...Cylindrical part, 22...Rim, 23°24...Notch, 30...Blocking ring.

Claims (1)

[Scope of utility model registration request] A removable closure device for a pump casing comprising a cylindrical extension of the pump casing, a cover and an annular surface for sealing against the cover, the co-operating closure member and the ridge being connected to said cover and the cylindrical shape. With an extension, said closure member has a surface comprising at least three parts, two of said parts being annular segments, said annular segments extending axially and circumferentially from each other. located in separate and parallel planes, a third of said portions being a helical portion interconnecting two annular sections, said ridge having a cam surface, and said cam having a cam surface; A closure device characterized in that the surface is configured such that when the cover is rotated, the clamp can move relative to the surface and press the cover into engagement with the annular surface. .