PISTON FOR FRICTION SHOCK DAMPENING IN WASHING MACHINES, WITH OPTIMIZED COUPLING.
Patent Information
- Application Number
- TR202416880U
- Authority / Receiving Office
- TR · TR
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2026-09-21
- Estimated Expiration
- 2033-12-12
Smart Images
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Abstract
Description
1 TARIFF FRICTION FOR WASHING MACHINES WITH OPTIMIZED COMBINATION. PISTON TOWARDS THE SHOCK ABSORBER The aim of the present invention is to create a washing machine equipped with a piston that has an optimized coupling. It is a piston designed as a friction shock damper for machinery. Especially suitable for existing The aim of the invention is to provide resistance to fatigue stress compared to pistons known from previous technology. more reliable in terms of maintenance, can be manufactured with less material, and works faster. can be produced with cycles, thus optimizing performance and known from the previous technique. Friction shock absorbers for washing machines that reduce costs compared to pistons. It is a piston that is directed towards... Technical field Friction shock absorbers are known to be used in washing machines. These are attached to the drums and chassis of washing machines and electric washing machines. in terms of reducing noise and vibrations caused by centrifugal force of machines It is useful. In general, configurations known from the previous technique include: open at one end, a shell (or outer casing) that has a largely tubular shape and the aforementioned A piston slides inside the shell, one part of the shell and piston is attached to the chassis and the other to a laundry basket. It is fixed to the drum of the machine. The piston is made of a metal plate of suitable thickness. It is manufactured via a cylindrical tube. It allows for the fixing of the shock absorber. 25 To ensure this, both the piston and the shell contain a housing with circular bearings. The casing is generally made from a part of the shell, while the piston is made of plastic material. It is manufactured by joining an element (usually made of polypropylene) with a metal pipe. Additionally, shock absorbers are placed between the sliding piston and the shell and the laundry 30 the alternating rotation of the piston caused by the rotation of the machine's drum relative to the chassis one or more friction rings configured to dampen oscillations These friction rings are included in the configurations, both on the piston and the shell. They can be positioned inside sliding cages, inside the shell but outside the piston. 2 It can be mounted or fitted into suitable housings obtained on the inner wall of the shell. They can be of the fixed type. Shock absorbers also have an open shell in which the piston enters. It includes a cap at the end. Previous technique 5 In the previous technique, washing machines basically worked according to what was just described. Various configurations of friction shock absorbers are known. Patent document number EP1584730 (a view of which is shown in Figure 12 of the existing application) (as shown), for washing machines equipped with a closing lid with elastic tabs. This describes a friction shock absorber. One variant is patented under number EP1637640. This is explained in the document (a view of which is shown in Figure 13), where the cover a cage containing internal teeth that serve as supports for a friction ring within it The shock absorber is explained. 15 In patent document number EP3809010 (a view of which is shown in Figure 14), the cover and axial positioning of the shells relative to each other in a precise relative position. a shock absorber for washing machines where motion is incorporated This is explained. A similar configuration is described in patent document number DE202016102547. It is explained (a part of which is shown in Figure 15). Configurations EP1754908 and EP2406519 are slightly different from those mentioned earlier. This is described in patent documents number [number]. Technical problem Configurations known from previous techniques are particularly relevant due to manufacturing costs and the mechanical nature of the piston. It is limited by reference to its performance. In fact, fastening between the pipe and the fittings is achieved by means of rolling. the necessity for its realization, the metal plate forming the piston tube This resulted in a regional reduction in its thickness and to withstand the project loads. Excessive, unchanged thickness (typically around 1 3 It has been observed that this requires the use of pipes with a diameter of mm. This is known from the previous technique. This is one of the primary disadvantages of pistons. Furthermore, the tensile strength of the fastening between the joint and the pipe is obtained by the shape, Torsional strength is obtained through the friction generated between the pipe and the joint. 5 However, this is the maximum friction resistance that can be applied between the pipe and the fitting. dependent on reliable knowledge of merging performance and similar aspects. this does not provide the possibility and the contact surfaces and clamping torques during rolling This requires over-sizing. This also means that the configurations known from the previous technique... This is the second disadvantage. Moreover, the need to rely solely on friction alone makes the piston's operation 10... During the study, another source of uncertainty regarding performance is identified. In fact, the friction generated on the piston by the friction elements within the shell It is known that friction dissipates kinetic energy as heat. This heat increases the piston's temperature. This causes it to increase, and since it is metallic, it is a good conductor, so combining 15 It also heats the element, thus increasing its temperature. Therefore, as clearly seen... Therefore, element performance - with regard to tensile strength - can only be improved. It is not dependent on maximum friction (which is still an uncertain parameter), but also It also depends on how it changes with temperature (which is an even more uncertain parameter). The purpose of the invention Therefore, the aim of the present invention is to apply known technical practices to washing machines. exceeding its limits and, especially in technology, being more economical and faster compared to what is currently known. It has a piston that can be manufactured in this way and also has a torsional strength of 25. The aim is to provide a damper that offers better mechanical performance. For another purpose, the present invention applies all the aforementioned applications for friction shock absorbers. achieving the objectives and also in the casing of the shock absorber or washing machine, The known impact resistance of 30 requires no modification to the cover or other components. It provides a piston that can be used with dampers. Brief description 4 The present invention is intended for use in friction shock absorbers for washing machines. By providing a piston (11) for this purpose, the above-mentioned objectives are achieved, and this piston This includes the following: a shaft with a hollow circular cross-section (111) and 5 a piston (11) for fixing to the chassis or drum of a washing machine ring (112), the ring in question is a part that goes into the shaft (111) and from there It includes a protruding section, The protruding part of the ring (112) in question, the piston (11) of a washing machine chassis 10 or includes fastening devices for fixing to the drum (1121), The section that enters the shaft (111) must contain the following: shaped for fixing the ring (112) to the shaft (111) one section (1122); 15 According to the shaped section (1122), the fixing devices (1121) arranged in the opposite section so that it can fit inside the said shaft (111). a first thickening with circular cross-section and dimensions (1124), and the following with 20 the shaped section in question (1122) is orthogonal to the axis of the shaft in question (11) In the cross-section, the non-circular shape of the thickening in question (1124) and at least one plane of symmetry passing through the axis of the said shaft (111) equipping, and the following with 25 The fixing of the said shaft (111) to the said ring (112) According to the unchanged circular shape of the shaft in the shaped section (111) Obtained through plastic deformation. Explanation of the figures 30 A detailed description of some of the preferred configurations of the invention is given in the attached figures 1 to 2. It will be given starting from 11. Figures 1 to 5 and 12 to 15 are known from the previous technique. It shows the appearance of the configurations; Figure 6 is shown in detail in Figure 7. According to the invention, it shows an assembled view of the piston; figures 8, 9 and 10, metal The invention shows three views of the fastening element without a pipe; Figure 11, According to the invention, only the section of the pipe is shown in cross-section; a cross-sectional view of the piston part. Figures 16 and 17 show, respectively, the configuration known from the previous technique and 5 According to the current invention, it shows two cross-sectional views of the piston. Figure 18 shows a cross-sectional view of the shell into which a piston, according to the invention, is fitted. It shows. Detailed explanation A friction shock absorber for a washing machine (1) as shown in Figure 1, a shell open at one end, on which a piston (10) slides protruding from the open end of the shell (20) is included. Friction elements are provided inside the shell (20) (as shown in figures 15). (not provided) and shell (20), to be fixed to the chassis or drum of a washing machine. It is equipped with a ring (21) for the purpose of. All of the elements just described are the previous It should be taken into consideration that the technique is known from previous techniques and any technique known from previous techniques. The variation, together with the piston that is the subject of the invention, without deviating from the purposes of the present invention. It is available. 20 As known from previous techniques and shown in Figure 2, the piston (10) is a piston (10) a shaft (101) and a ring for fixing to the chassis and drum of the washing machine (102) is included. While the shaft (101) is made of a metal pipe, the ring (102) is made of plastic. It is manufactured from the material. The fastening between the ring (102) and the shaft (101) is rolled 25 It is obtained through this means. To achieve this purpose, the ring (102) is inserted into the shaft (101), then by the rotation of the two rollers. It contains a shape-changing circular indentation (1021). On the contrary, as shown in figure 6, according to the invention, the piston (11) is a washing machine of the piston (11). a shaft with a hollow circular cross-section for fastening to the chassis or drum of the machine It includes (111) and a ring (112). The shaft (111) is manufactured through a metal pipe, The ring (112) is made of plastic material and the ring (112) is fixed to the shaft (111). 6 pressing (113), in other words, the ring (112) has a non-circular cross-section obtained through the movement of several molds in the section (111) It is obtained through the plastic deformation of the material. Indeed, the piston ring (112) has a fixing section for fixing to the chassis or drum 5 (1121), a shaped section for fixing to the shaft (111) (1122) and the said in the opposite section of the fixing devices (112) according to the shaped section (1122) designed with circular cross-section and dimensions that can fit inside the said shaft (111). It contains a first thickening (1124). Therefore, the formed section (1122) Axial development (L) reduces the deformation area of the shaft (111) during the joining process by 10 It defines. Without limiting the purposes of the invention, the axial development (L) in question is defined. The subject shaft (111) has dimensions between 30% and 50% of the inner diameter. The shaped section in question (1122), when viewed from the cross-section, shows the thickening in question. (1124) has a non-circular shape within the shape, so the shaft (111) is figure 15 When it changes shape to adhere to faces (1123) as shown in 11, it thickens. (1124) prevents the shaft (111) from sliding axially relative to the ring (112). The fact that the formed section has a non-circular shape in cross-section means that the ring (112) is attached to the shaft. (111) prevents it from turning. Also, preferably the ring (112), fixing section (1121) and 20 placed between the shaped section (1122) and having a diameter equal to the outer diameter of the shaft (111). and includes an adjacent section (1126) equipped with a flat adjacent surface (1261), so that the relative axial position of the two parts when the ring (112) enters the shaft (111) It is determined. Also preferably the ring (112) also adjacent section (1126) and shaped section 25 (1122) placed between them, a second thickening with an outer diameter equal to the first (1124). It contains thickening (1125). According to one configuration, the non-circular shape in question is shown in the cross-sectional view in Figure 17. As shown, multiple faces angled relative to each other and each equipped with a notch. 30 (1123) is included. In the figures, the configurations are shown as having six faces, however Without deviating from the purposes of the invention, a different number of faces can also be used. Preferably, the word The subject is a non-circular shape, with at least one symmetry passing through the axis of the shaft (111). It is equipped with a plane so that the shape of the shaft (111) around the shaped section 7 The modification involves bringing together two patterns with the same geometry, perpendicular to the plane of symmetry. This can occur through this means. Therefore, joining the ring (112) and the shaft (111) results in circular thickening (1124) and 5 in the unshaped configuration of the shaped section (1122) inside the shaft (111) This is achieved by insertion. Below, the shaft adheres to the shaped section in question. It changes shape accordingly, thus exhibiting the configuration shown in figures 6 and 11. It provides both axial fixation and relative rotation, depending on the shape of the elements. It is blocked and, unlike in configurations known from previous techniques, it resists friction. There is no need to rely on it. 10 Furthermore, the achieved fixing condition is compared to the fixing conditions known from previous techniques. Although it is more reliable, the deformation required for the material of the shaft (111) is less and this also a smaller thickness (again 0.4 - 0.5 mm) compared to the thickness usually used (1 mm) It allows the use of shafts manufactured with layers that have a certain structure. 15 Another advantage is that the working time required for fastening via pressing is reduced, and the part... work required for rolling, along with obvious positive effects on total working time. It is shorter than the duration. None of the many examples in the previously shown technique yielded the results just mentioned. It has been observed that it has not reached this level: indeed, many companies have designed similar products so far, In many configurations of friction shock absorbers for washing machines Technical solutions for joining the shaft and ring by means of rolling Even if they all use them, they all suffer from the disadvantages just described. 25
Claims
8 REQUESTS 1. Piston intended for use in friction shock absorbers for washing machines. (11) and includes the following: a shaft with a hollow circular cross-section (111) and 5 for fixing the piston (11) to the chassis or drum of a washing machine a ring (112), a part of which the ring fits into the shaft (111) and It includes a section that protrudes from it, The protruding part of the ring (112) in question is the piston (11) of a washing machine Includes fastening devices (1121) for fixing to the chassis or drum, 10 The section that enters the shaft (111) is characterized by containing the following: is being done: for fixing the ring (112) to the shaft (111) a shaped section (1122); According to the shaped section (1122), the fastening devices in question are 15 (1121) arranged in the opposite section, which can fit into the shaft (111) in question. a first thickening with circular cross-section and dimensions as shown (1124), and the following the shaped section in question (1122) is orthogonal to the axis of the shaft in question (11) The fact that the cross-section contains multiple faces angled to each other (1123) indicates that the thickening in question (1124) 20 its shape and at least one symmetry passing through the axis of the said shaft (111). It is equipped with a plane and is characterized by the following: The fixing of the said shaft (111) to the said ring (112) the shaft in question, according to its unchanged circular shape in the formed section (111) obtaining it by plastic deformation, the plastic deformation in question is 25 obtained by moving several molds in the shaped section in question to be done.
2. Each of the faces in question (1123) is characterized by being indented, according to Claim 1. 30 for use in friction shock dampers for washing machines piston (11).
3. Characterized by having a bottom surface, as per Claim 1 or 2, of the said shape. 9 Pistons for use in friction shock absorbers for washing machines. (11).
4. The axial development (L) of the shaped section (1122) in question, of the shaft in question (111) characterized by having dimensions between 30% and 50% of the inner diameter, 5 According to one of the previous requests, friction shock absorbers for washing machines piston for use (11).
5. The ring in question (112), the fastening section in question (1121) and the ring in question It contains an adjacent section (1126) placed between the shaped section (1122), word 10 The subject is that the adjacent section (1126) has a diameter equal to the outer diameter of the shaft (111) and is straight. characterized by being equipped with an adjacent surface (1261), according to one of the previous requests Pistons for use in friction shock absorbers for washing machines. (11).
6. The aforementioned ring (112) is also the aforementioned formatted section (1226) and placed between the said shaped section (1122) the said first by including a second thickening (1125) with an outer diameter equal to the thickening (1124). Friction shock for washing machines, as characterized by Claim 5. Piston for use in dampers (11). 20 7. The shaft (111) in question is manufactured through a metal pipe, while the ring in question (112) characterized by being made of plastic material, one of the previous requests According to the plan, it is intended for use in friction shock dampers for washing machines. piston (11). 25 8. With a ring (21) for fixing to the chassis or drum of a washing machine equipped and in accordance with one of the previous requirements, a piston (11) is slid together friction impact on the washing machine which includes a shell (20) open at one end damper (1). 30