CN1083034C - Washer with plastic rinsing container - Google Patents

Abstract

A washing machine having a immersion container for a washing drum, the washing drum has an at least nearly horizontal rotating shaft, and an at least approximately circular sheet-shaped counterweight is mounted on the bottom of the immersion container, and the specific gravity of the counterweight material is greater than 2g /cm ³ , characterized in that: at the bottom (11) a circle is formed by splints (13) spaced apart from each other and perpendicular to the main plane of the bottom (11), and in the circle of the bottom (11) at least three contact surfaces (19) in a plane of the main plane of the bottom, on which the counterweights (12) are held flat by these clamping plates (13), the outside of which are surrounded by a tension strap (16), securing them The narrow perimeter surface (24) is tensioned against the counterweight (12).

Description

Washing machine with a plastic soaking container

The invention relates to a washing machine, which has a soaking container for a washing drum, the washing drum has an at least nearly horizontal rotating shaft, and an at least nearly circular sheet-shaped counterweight is mounted on the bottom of the soaking container, the counterweight material is The specific gravity is greater than 2g/cm ³ .

DE4238686C1 discloses such a washing machine. The counterweight of this washing machine is perforated in line with the frusto-conical helical tube that fits in the bottom of the immersion vessel. The helix screwed in from the upper surface of the counterweight is directed on the one hand to the spring seat in the perforation and on the other hand to the helical tube of thermoplastic material also located in the perforation from below. Here, the tension is such that, despite the relaxation characteristic of thermoplastics, sufficient elasticity remains at the end of its life. In addition to the difficulty of obtaining precise breakaway torques in such a difficult range, the homogeneity achievable with thermoplastics is likely to be barely adequate for the conditions that such screw connections should satisfy.

In DE3217160A1, a type of counterweight connection that is irreproachable in this respect is disclosed. A metal outer hub is cast on the side of the concrete counterweight, which is a roll that angles downward. The soaking container also has such an outer roll at the height of the front bottom. The inclined outer surfaces of the two outer rolls together form a top overlapped by a top-shaped tension ring. When tensioned, the top surfaces of the two outer rolls move toward each other. This creates a stable connection between the rinsing container and the counterweight.

A disadvantage of this type of connection is the unfavorable combination of the two materials, concrete and steel, in the area of the cast outer hub. Because the outer hub expands more than the concrete body at high temperatures, the tight connection between the two parts gradually loses. In this regard, the connection strength will be affected, and thus there will be higher requirements for the dimensional accuracy of the counterweight. For this purpose, the top area of the tensioning ring is placed more or less above the outer edge of the outer roll, and only then is the counterweight sufficiently close to the front bottom of the immersion container. Furthermore, the installability of this known counterweight is compromised because the counterweight must remain high on the front bottom of the infusion vessel until the tension rings are installed.

The object of the present invention is based on, for a washing machine of the type mentioned at the outset, finding a connection of the counterweight of the immersion container which has no appreciable external influence under any operating conditions of the washing machine and which is easy to install. It is also taken into account that the customer service in terms of fixing the counterweight body does not impose any special installation conditions.

According to the invention, this task is solved in that a circle is formed at the base by spaced-apart clamping plates perpendicular to the main plane of the base, in which at least three contacts are formed in a plane parallel to the main plane of the base. The counterweights are held flat against these contact surfaces by the cleats, the outside of the cleats being surrounded by a tensioning strap, which draws them taut against the narrow peripheral surfaces of the counterweights.

There is nothing to blame for the robustness of the connection form according to the invention over the lifetime. Different temperature expansions have no effect on the robustness of this connection, and the permissible tolerance of 1mm for the counterweights relative to the diameter of this chassis is also beyond reproach. Furthermore, the counterweight according to the invention is easy to install. Because the cleats already hold the counterweight before the tensioning belt is tensioned, and the counterweight is automatically centered within the ring when the tensioning belt is tensioned. Since the counterweight is nowhere fixed to the immersion vessel with point-like supports, stress cracking of the counterweight is eliminated. If there is already a split in the counterweight, the compressive force on the perimeter will also cause it to snap together.

The washing machine according to the invention can be further designed in a very advantageous manner in that the narrow peripheral surface of the counterweight is inclined such that the diameter of the circular surface on the non-fitted side is smaller than the diameter of the circular surface on the fitted side. In this way, under tension, the free ends of each splint are clamped on a smaller circle diameter, so that the counterweight is not only forcefully connected by the compression force of the tension belt, but also reasonably fixed in shape. Dip the bottom of the container.

The washing machine according to the invention can also advantageously be designed in such a way that the free end of the clamping plate has a rise beyond the thickness of the tensioning strap. In particular in connection with the above-mentioned refinement, it has the advantage that the tensioning strap cannot slip off the free end of the clamping plate.

According to a further advantageous embodiment of the invention, the tensioning belt is an endless steel belt with tension locking elements at each end, so that the necessary tensioning pressure can be generated in a simple manner.

Advantageously, the peripheral surface of the counterweight is just flat under the tension lock, leaving a clearance on the circumference of the clamping plate at least as long as the tension lock. The effect of the flat section on the peripheral surface in this case is to create an orientation favorable for screwing the locking piece.

The present invention will be described below with reference to the embodiments shown in the drawings.

Figure 1 is a side view of a top loading washing machine shown in section;

Figure 2 is a bottom view of a dipping vessel constructed in accordance with the present invention with a counterweight;

Fig. 3 is a nearly vertical sectional view through the counterweight fixed at the bottom of the immersion vessel along the section line III-III in Fig. 2;

Figure 4 is an enlarged view of detail IV in the area of the tension lock in Figure 2;

FIG. 5 is an enlarged view of a vertical section through the counterweight in the region of the fixing cleat corresponding to detail V in FIG. 3 before tensioning;

Figure 6 is an enlarged view of the same area in Figure 5 after tensioning.

The top-loading washing machine in FIG. 1 comprises an immersion container 2 driven by a drive 3 consisting of a motor 4 , a belt 5 and pulleys 6 . The belt pulley is rotationally fixedly connected to a horizontally rotatable washing drum (not shown here) which is mounted in the immersion tank 2 . The immersion container 2 is vibrator-suspended by springs 7 inside the housing 8 of the washing machine 1 and supported on the bottom 10 of the housing 8 by shock absorbers 9 . A counterweight 12 is fixed on the chassis 11 of the soaking container 2 on the opposite side with the driving device 3, and its effect is on the one hand as a counterweight for the quality of the driving device 3, and on the other hand as a vibration dipping container system Damping block.

The annular structure of the counterweight 12 can be seen in the view of the chassis 11 shown in FIG. 2 . The counterweight is housed in a flat pot-shaped structure of the chassis 11, the peripheral side walls of which are formed by clamping plates 13 arranged at a distance from each other on a circumference, the clamping plates 13 being integral parts with the chassis 11 made of plastic . At the point shown by detail IV, a recess 14 remains in the circumference formed by the clamping plate, on which recess the counterweight 12 has a flat section 15 . It is used as the support of two tensioning frames 17 which are respectively installed at the two ends of a tensioning belt 16, and the pulling force exerted on the two ends of the tensioning belt 16 by a bolt 18 draws the two tensioning frames closer to each other.

From the section shown in FIG. 3 through the chassis 11 and the counterweight 12 along the section line III-III in FIG. 2 , it can be seen that the counterweight 12 is in contact with the chassis 11 through a contact surface 19 . The contact surface 19 is part of one of three circularly distributed elevations 20 on the chassis 11 . These three bumps are provided in order to give the counterweight 12 a defined contact position. Since in this way the rest of the surface of the chassis 11 is not in contact with the counterweight 12, the vibration noise generated by this connection is avoided.

Detail IV in FIG. 2 , which is shown enlarged in FIG. 4 , shows the tightening locking of the tightening strap 16 in detail. Tension frame 17 is housed at the two ends of tension band 16, and its one side is used for holding the bolt head 21 of bolt 18, and the other side is used for holding the nut 22 of bolt 18. When the bolts are tightened, the tension frame 17 slides on the flat section 15 of the counterweight 12, so that the legs 23 will not be moved away from their perpendicular positions.

Detail V in FIG. 3 shown in FIG. 5 shows the position of a splint 13 and tensioning strap 16 before tensioning by the tensioning locks 17 , 18 , 21 , 22 . It can be clearly seen that the narrow peripheral surface 24 of the counterweight 12 is slightly inclined so that the diameter of the contact side 25 of the counterweight 12 is greater than the diameter of the non-contact side round surface 26 by an angle of inclination of 2.5°. In order for the clamping plate 13 to easily bear against the narrow peripheral surface 24 of the counterweight 12 under the pressure of the tensioning strap 16, the base of the clamping plate 13 has a smaller thickness than its free end. The clamping plates distributed over the circumference of the chassis 11 have at their free ends a rise 27 beyond the thickness of the tensioning strap. The effect of these elevations is to prevent the tension strap 16 from slipping off the slightly inclined cleat 13 . The remaining splints do not have this elevation, as shown in detail X in Figure 3.

FIG. 6 shows the situation corresponding to the details in FIG. 5 after installation. The tensioning strap 16 now presses the entire clamping plate 13 against the inclined peripheral surface 24 of the counterweight 12 . In this way, on the one hand, because the tensioning force acts on the peripheral surface, the force is reasonable; 2.5°), so the shape is reasonable. The shape of the clamping plate 13 (as can be clearly seen in FIG. 6 ) is chosen such that its outer surface forms an angle of 90° with respect to the contact side 25 of the counterweight 12 in its contact position. This also reduces the risk of slipping on the clamping plate 13 in the tensioning strap 16 .

Claims (6)

1. A washing machine, which has a soaking container for the washing drum, the washing drum has at least a nearly horizontal rotating shaft, and a sheet-shaped counterweight at least close to a circle is housed at the bottom of the soaking container, the specific gravity of the counterweight material Greater than 2g/cm ³ , characterized in that: at the bottom (11) a circle is formed by splints (13) spaced apart from each other and perpendicular to the main plane of the bottom (11), at least three located in the circle of the bottom (11) are formed an in-plane contact surface (19) parallel to the main plane of the bottom, on which the counterweight (12) is held flat by the cleats (13), the outside of which is surrounded by a tensioning strap (16), They are pulled taut against the narrow peripheral surface (24) of the counterweight (12). 2. The washing machine according to claim 1, characterized in that the narrow peripheral surface (24) of the counterweight (12) is inclined such that the diameter of the circular surface (26) of the non-contact side is smaller than that of the contact side (25) The diameter of the circular surface. 3. A washing machine according to claim 1, characterized in that the free ends of the three or more clamps (13) have a rise (27) beyond the thickness of the tensioning strap (16). 4. A washing machine according to claim 2, characterized in that the free ends of the three or more clamping plates (13) have a rise (27) beyond the thickness of the tensioning strap (16). 5. The washing machine according to any one of claims 1 to 4, characterized in that: the tension belt (16) is an endless steel belt, and its end has two locking parts (17, 18, 21, Component (17) of 22). 6. The washing machine according to claim 5, characterized in that, under the tension locks (17, 18, 21, 22), the peripheral surface (24) of the counterweight (12) is completely flat, in the clamping plate (13) has a recess (14) at least as long as the tension lock (17, 18, 21, 22) on its circumference.

Images