RU2377349C2 - Device for fixation of domestic washing machine drum in transportation - Google Patents

Abstract

FIELD: personal demand items.

SUBSTANCE: device for fixation of domestic washing machine drum in transportation comprises screw that connects wall of body and part of drum. Starting from its head located outside body wall, screw passes through and through body wall and is screwed into drum part. Between screw head and body wall, and also between body wall and drum part on each section there is a shock-absorbing element arranged, which springs in axial direction. Screw head and part of drum are held at a distance from each other by means of tube that passes through and through body wall and surrounds screw. Tube passes through and through both shock-absorbing elements, which in its tubular version comprise deformable part made of elastomer, previously stressed by means of screw with double-sided stop of tube.

EFFECT: with screw screwed certain pre-stressing of shock-absorbing elements is achieved, in which inertial forces from pushes in transportation of washing machine are reliably perceived with sufficient space for elastic motion.

5 cl, 5 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a device for fixing the drum of a washing machine during transportation, comprising a screw connecting the housing wall and a part of the drum, which, starting from its screw head located outside the housing wall, passes through the housing wall and is screwed into the drum part, between the head screw and the wall of the housing, as well as between the wall of the housing and part of the drum in each section of the screw is located axially springing shock-absorbing element.

State of the art

A device for fixing during transportation of this type is described and presented in the patent document of Germany No. 4215780 C2. In this device, an axially spring-absorbing cushioning element is made in the form of spacer sleeves of sheet material perforated with a plurality of holes, which gives spacer sleeves elasticity in the axial direction. The cushioning element located between the screw head and the housing can also be made in the form of a coil spring. In order to prevent excessive squeezing of the bushings when screwing a screw into a part of the drum, a thread is provided on the screw only on a certain part of its length. This length is chosen such that the stroke of the screw is limited by screwing this portion of the thread into a portion of the drum. However, the maximum screwing depth determined in this way is not accurate and depends on the moment the screw is finished, so this method of restricting the screw does not provide a precisely defined spring travel. In addition, spacers made of perforated sheets form a complex structural component with a small spring stroke.

In another known device for fixing during transportation according to the German patent document No. 19852129 A1, a shock-absorbing element in the form of a coil spring is provided only between the screw head and the housing wall. The device for fixing contains a spacer sleeve located between the wall of the housing and part of the drum, and the surrounding screw. To install the device for fixing it is inserted into the wall of the housing through the hole passing the spacer sleeve, and then shifted sideways into the narrowing of the hole, so that the spacer sleeve abuts against the inside of the drum and the wall of the housing. Next, screw the screw, which causes the tension of the coil spring, and the final stress of the spring is determined by screwing the screw. In this solution, the compliance of the spring with respect to the shocks that the household washing machine undergoes during transportation depends on the tightening of the screw, so that with excessive tightening of the screw, the spring perception of strong shocks cannot be reliably ensured.

Disclosure of invention

The problem to which the present invention is directed, is to create a device for fixing during transportation, which, on the one hand, forms a simple structural component, and on the other hand, when the screw is screwed, the device provides a certain prestressing of the shock-absorbing elements, which can reliably and with sufficient space for elastic running, the inertial forces from the shocks during transportation of the washing machine are perceived.

In accordance with the invention, the solution to this problem is achieved in a device for fixing the drum of a household washing machine during transportation, containing a screw connecting the casing wall and part of the drum, which, starting from its screw head located outside the casing wall, passes through the casing wall and screwed into part of the drum. Between the screw head and the wall of the housing, as well as between the wall of the housing and part of the drum, axial spring-absorbing elements are arranged. According to the invention, the screw head and the drum part are held apart from each other by means of a tube passing through the housing wall and surrounding the screw, while the tube passes through both shock absorbing elements, which in their tubular embodiment comprise a deformable part made of elastomer, prestressed by screw with double-sided tube stop.

Due to the coaxial arrangement of the screw, tube and the shock-absorbing element on both sides of the housing wall, a structure is created in which, due to the presence of the tube when screwing the screw and the corresponding voltage of the shock-absorbing elements, a certain distance is created between the inner side of the screw head and the drum part, and thereby a certain desired shock-absorbing voltage elements. This ensures reliable perception by shock-absorbing elements of all the shocks that practically occur during transportation. These shock-absorbing elements are made in the form of tubular elastomers that harmoniously fit into the coaxial combination of a screw, tube and shock-absorbing element and can be easily molded as structural parts.

Preferably, the deformable part of the elastomer is placed between the wall of the housing and the part of the drum so that the deformable part is installed between two inelastic bushings. Due to this, the length of the deformable part is limited in the aspect of obtaining the desired elasticity or elasticity. From the side of the screw head, the shock-absorbing element consists exclusively of the deformable part, since there is only a small space between the screw head and the housing for overlapping the deformable part. In this case, the deformable part is installed between two rigid washers, one of which abuts against the screw head and the other against the wall of the housing.

According to an advantageous embodiment, the shock-absorbing element can be made in such a way that between the wall of the housing and the drum part it consists of an inelastic sleeve and a deformable part.

The implementation of the shock-absorbing element between the screw head and the wall of the housing may also be such that the shock-absorbing element between the screw head and the wall of the housing consists of a deformable part limited on one side by a rigid washer adjacent to the screw head and on the other side by the wall of the housing.

List of drawings

Next, with reference to the accompanying drawings will be described in detail examples of the invention.

Figure 1 depicts a device for fixing before screwing into part of the drum,

figure 2 depicts the device in section along the line II-II in figure 1,

figure 3 depicts the same device screwed into a portion of the drum,

figure 4 depicts the device in section along the line IV-IV in figure 3,

figure 5 depicts a modification of the device for fixing, in which the shock-absorbing element between the wall of the housing and part of the drum is made simplified in comparison with the exemplary embodiment of figure 2.

Information confirming the possibility of carrying out the invention

Presented in figure 1, the device for fixing during transportation is designed to be installed between part 1 of the drum and the wall 2 of the housing by screwing the screw 3 into part 1 of the drum (see figure 4). The following parts are worn on the screw 3 with the head 4: inelastic bushings 5 and 6 and a deformable part 7, which forms the main part of the shock-absorbing element located between the drum part 1 and the housing wall 2. Between the screw head 4 and the housing wall 2, there is another deformable part 8 installed between the rigid washers 9 and 10. In this case, the deformable part 8 abuts through the washer 10 into the screw head 4 and through the washer 9 into the housing wall 2. Figure 1 also shows the tab 11, protruding from the washer 9 and passing through the wall 2 of the housing, as will be described in more detail with reference to figure 2.

Figure 2 depicts the device in section along the line II-II in figure 1. The drawing shows the internal structure of the device for fixing during transportation with two inelastic sleeves 5, 6, between which a deformable part 7 made of elastomer is installed. Through this coaxial set of elements from the sleeve 5, the deformable part 7 and the sleeve 6 passes through the axial direction of the tube 12 with the stop flanges 13, 14 at the ends. The purpose of the thrust flanges 13, 14 will be clear from the description of FIG. 4. A screw 3 is inserted into this general coaxial set, which extends from the washer 10 to the outer end 13 of the sleeve 5 and protrudes from this sleeve 5. To screw the screw 3 into the drum part 1, a groove 16 is provided in it. The tab 11, bent from the washer 9, passes through through the corresponding hole in the wall 2 of the housing and serves to ensure that the fixing device inserted into the wall 2 of the housing cannot be pulled outward sideways from the position of FIG. 2.

The installation of the device for fixing during transportation, shown in figures 1 and 2, is carried out as described above with reference to the patent document of Germany No. 198585129 OS. The hole in the wall 2 of the housing is made in such a way that the fixing device during its installation can be shifted sideways to a position in which the wall 2 of the housing supports it, and the device can no longer be removed due to the tab 11.

Both deformable parts 7, 8 are made of an elastomer (EPDM: ethylene-propylene-diene monomer), which is compressed under axial pressure, due to which the length of the deformable parts 7, 8 becomes less. For this, the deformable part 7 is provided with an inner annular cutout 15, due to which, under pressure on it 7 from two sides, through inelastic bushings 5 and 6, it can bulge outward to form a roof, as shown in Figs. 3 and 4. Corresponding buckling of the deformable part 8 also occurs with pressure on it from both sides, as is also shown in FIGS. 3 and 4.

Figure 3 shows the device for fixing during transportation of figures 1 and 2 in position with the screw 3 screwed on. In this case, the screw head 4 creates pressure on both deformable parts 7 and 8, which accordingly bulge outward.

As shown in FIG. 4, the thread of the screw 3 is screwed into the drum part 1 until the tube 12 rests with its thrust flanges 13, 14 against the corresponding thrust surfaces, namely the side wall of the drum part 1 and the washer 10. After reaching this position, both stop flanges 13, 14, the screw reaches its final position, in which both deformable parts 7 and 8 are subjected to deformation under the action of the pressure exerted on them, which leads to their buckling, as shown in Figs. 3 and 4.

Now, if pulsed forces exert impact on part 1 of the drum, for example, due to shaking, shocks, etc., in the region of the deformable part 7, when pressure is applied to it, part 1 of the drum approaches the wall 2 of the housing while removing the head 4 screws from the wall 2 of the housing. In this case, the deformable part 8 is unloaded from the pressure, since less pressure acts on it. The corresponding action in the opposite direction occurs when the part 1 of the drum is displaced from the wall 2 of the housing. In this case, the forces acting on the drum part 1 are completely perceived by the elastomer of both deformable parts 7 and 8. After the jerk ceases, both deformable parts 7, 8 return to their position in Fig. 4, in which the axial pressures from both deformable parts 7 and 8 are mutually balanced. Thus, the system of mutually opposite stresses formed in the device for fixing during transportation, again takes its original position.

5, a device for fixing during transportation is shown in section in a modified embodiment. The shock-absorbing element located between the drum part 1 and the housing wall 1 consists of an inelastic sleeve 5 and an elastic deformable part 17, which abuts on one side of the sleeve 5 and, on the other hand, in the wall 2 of the housing. This part order may be reversed. When screwing the screw 3, the deformable part 17 is crimped and takes the form, which, in any case, in the region of the internal cutout 15, corresponds to the shape of FIG. 4 and creates the desired stress. Thus, the device in the exemplary embodiment of FIG. 5 has a simplified construction compared to the device of FIGS. 1-4 and contains only one sleeve 5. In addition, in this exemplary embodiment, the device does not have one of the washers, so that the deformable part 8 abuts on the one hand in the washer 10, and on the other hand directly in the wall 2 of the housing.

Claims (5)

1. Device for fixing the drum of a household washing machine during transportation, containing a screw (3) connecting the wall (2) of the housing and part (1) of the drum, which, starting from its head (4) located outside the wall (2) of the housing, passes through the wall (2) of the housing and screwed into part (1) of the drum, and between the head (4) of the screw and the wall (2) of the housing, as well as between the wall (2) of the housing and part (1) of the drum, axially spring-absorbing elements, characterized in that the head (4) of the screw and part (1) of the drum are held at a distance from each other by means of a tube (12) passing through the wall (2) of the housing and the surrounding screw (3), while the tube (12) passes through both shock absorbing elements, which in their tubular embodiment contain a deformable part made of elastomer (7, 8), prestressed by means of a screw (3) with a double-sided stop of the tube (12). 2. The device according to claim 1, characterized in that the shock-absorbing element between the wall (2) of the housing and the drum part (1) consists of two inelastic bushings (5, 6) and a deformable part (7) located between them. 3. The device according to claim 1 or 2, characterized in that the shock-absorbing element between the head (4) of the screw and the wall (2) of the housing consists of a deformable part (8) installed between two rigid washers (9, 10), of which one adjacent to the head (4) of the screw, and the other to the wall (2) of the housing. 4. The device according to claim 1, characterized in that the shock-absorbing element between the wall (2) of the housing and the drum part (1) consists of an inelastic sleeve (5) and a deformable part (17). 5. The device according to claim 1 or 4, characterized in that the shock-absorbing element between the head (4) of the screw and the wall (2) of the housing consists of a deformable part (8) bounded on one side by a rigid washer (10) adjacent to the head ( 4) a screw, and on the other hand, by the wall (2) of the housing.

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