JPH0544096U - Bearing for rotating drum - Google Patents

Abstract

(57) [Abstract] [Purpose] A plurality of bearing members 21 are mounted side by side in the circumferential direction on the inner surface of a cylindrical support plate 31, and the bearing members 21 are mounted on the outer peripheral rubber-like elastic body 22 and on the inner peripheral side. Regarding the rotary drum bearing having the two-layer structure of the moving material 23, the rotary drum 35
The rubber-like elastic body 22 is prevented from being torn off by the sliding resistance during rotation. [Structure] A pair of concave step portions 24 are provided at ends of a rubber-like elastic body 22 in a circumferential direction, and a pair of tongue pieces having a substantially L-shaped cross section that engage with the concave step portions 24 on an inner surface of a support plate 31. 32 is provided, and the recessed step portion 24 and the tongue piece portion 32 are provided with flat engagement surfaces 25 and 33 that engage with each other in the circumferential direction, and a load due to sliding resistance is received in a wide area.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvements in bearings for rotating drums. The rotating drum bearing of the present invention is mainly used to support the rotating drum of a clothes dryer.

[0002]

[Prior Art]

 As shown in FIG. 7, the clothes dryer has a rotating drum 1 for containing clothes, which is supported by bearings 2 and 3 before and after in the axial direction thereof and is rotated by a motor 4. As shown in FIG. 8, the bearing 2 on the left side of the drawing has a cylindrical support plate in which a plurality of (four in the figure) bearing members 5 are arranged in the circumferential direction, and the bearing members 5 are fixed to the housing 6, respectively. It is mounted on the inner surface of 7. As shown in FIG. 9, the bearing member 5 has a two-layer structure of a rubber-like elastic body 8 and a sliding member 9. The rubber-like elastic body 8 and the sliding member 9 are adhered to each other, and the rubber-like elastic body 8 is integrally provided with two substantially cylindrical projections 10. As shown in FIG. 10, each of the bearing mounting portions of the support plate 7 is provided with two circular holes 11, and the projections 10 are inserted into the circular holes 11 so that the bearing member 5 is attached to the supporting plate 7. It is fixed.

[0003]

[Problems to be solved by the device]

 When the rotating drum 1 is rotated, the rotating drum 1 and the sliding member 9 slide, and the load due to the sliding resistance concentrates on the engaging portion of the protrusion 10 and the circular hole 11 to act. The clothes accommodated in the rotary drum 1 are wet and have a considerable weight, and when the rotary drum 1 is rotated with a capacity of clothes accommodated therein, a considerable shearing force is applied to the root portion of the protrusion 10. Moreover, since the support plate 7 is made of metal and the circular hole 11 is punched out by press working, the peripheral edge of the circular hole 11 is an edge. Therefore, from these things, the edge may bite into the protrusion 10 and the protrusion 10 may be broken.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, a cylindrical support plate A plurality of bearing members are arranged side by side in the circumferential direction on the inner surface of the bearing, and the bearing member has a two-layer structure of a rubber-like elastic body on the outer peripheral side and a sliding member on the inner peripheral side. The rubber-like elastic body is provided with a pair of concave step portions at its circumferential end portion, and the inner surface of the support plate is provided with a pair of tongue pieces having a substantially L-shaped cross section that engages with the concave step portion. There is provided a bearing for a rotary drum, characterized in that a flat engagement surface is provided on the portion and the tongue piece so as to engage with each other in the circumferential direction.

[0005]

[Action]

 The pair of concave step portions provided on the rubber elastic body and the pair of tongue pieces provided on the support plate are engaged with each other, whereby the bearing member is attached to the support plate. The recessed step portion and the tongue piece portion have a flat engagement surface that engages with each other in the circumferential direction, and a load due to sliding resistance is applied to a wide area formed by the flat surface.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the bearing member 21 as a single item. FIG. 2 shows the same bearing member 21 turned upside down. As shown in both figures, the bearing member 21 has a two-layer structure of a rubber-like elastic body 22 and a sliding material (made by Rare Freon (trade name)) 23 adhered to each other. A pair of concave step portions 24 are formed at the end portions (in the circumferential direction and in the radial direction and the axial direction described later, all are directions when the bearing member 21 is mounted on the inner surface of the cylindrical support plate 31). The recessed step portion 24 has a flat engagement surface 25 that rises in a substantially radial direction. A convex portion 26 for axially positioning the bearing member 21 is formed at the center of the concave step portion 24 in the axial direction. A large number of grooves 29 are formed in parallel on the surface 28 of the thick portion 27 between the pair of concave step portions 24. As shown in FIG. 3, the groove 29 may be provided with a ridge 30 by changing its cross-sectional shape and arrangement. The surface 28 is a curved surface along the circumferential direction, and the curvature of the surface 28 is set smaller than the curvature of the inner surface of the support plate 31.

FIG. 4 shows a bearing mounting portion provided on the inner surface of the cylindrical support plate 31. As shown in the figure, a pair of tongue pieces 32 having a substantially L-shaped cross section that engages with the recessed step portion 24 are formed on the inner surface of the support plate 31 by press working, and the tongue pieces 32 are formed in a substantially radial direction. A flat engagement surface 33 is formed that stands up and engages with the engagement surface 25 of the bearing member 21 in the circumferential direction. A window portion 34 into which the protrusion 26 of the bearing member 21 is fitted is formed at the center of the tongue portion 32 in the axial direction. The axial length of the tongue portion 32 and the axial length of the bearing member 21 are substantially the same as shown in FIG.

FIG. 6 shows a state in which the bearing member 21 is mounted on the bearing mounting portion of the support plate 31, and the bearing member 21 further supports the rotary drum 35. As shown in the figure, when the rotary drum 35 is rotated, the rotary drum 35 and the sliding member 23 slide to generate a load due to sliding resistance. It is received by the engagement of the mating surfaces 25 and 33, and is received in a wide area formed by the flat surface. Therefore, the load is not concentrated on a part of the rubber-like elastic body 22, and it is possible to prevent the rubber-like elastic body 22 from being broken by the load. As described above, the surface 28 of the rubber-like elastic body 22 is a curved surface, and the curvature of the curved surface 28 is set smaller than the curvature of the inner surface of the support plate 31. A large number of grooves 29 or ridges 30 are formed on this surface 28. With this configuration, the rubber-like elastic body 22 and the support plate 31 change their contact state with each other as the weight in the rotary drum 35 changes. That is, when a large amount of clothes containing a large amount of water is stored in the rotating drum 35, the rubber-like elastic body 22 is largely elastically deformed due to its large weight, resulting in a large contact area and load bearing capacity. Increase. The contact area gradually decreases as the drying progresses gradually and the weight becomes lighter. Therefore, it is possible to always support the rotary drum 35 with an appropriate elasticity, and to suppress the noise due to rattling.

[0010]

[Effect of the device]

 The present invention has the following effects. That is, since the load due to the sliding resistance during the rotation of the rotary drum is received by the engagement of the engagement surfaces, which are the contact between the flat surfaces, it is possible to prevent the rubber-like elastic body from breaking. The durability of the bearing can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a bearing member according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the same bearing member turned over and viewed.

FIG. 3 is a perspective view showing another example of the bearing member.

FIG. 4 is a perspective view of a main part of a support plate.

FIG. 5 is a perspective view of a state where a support plate and a bearing member are combined.

FIG. 6 is a sectional view showing an operating state of a bearing member.

FIG. 7 is a sectional view schematically showing the structure of a clothes dryer.

8 is a cross-sectional view taken along the line AA in FIG.

FIG. 9 is a front view of a bearing member according to a conventional example.

FIG. 10 is a sectional view showing an operating state of a bearing member.

[Explanation of symbols]

 21 bearing member 22 rubber-like elastic body 23 sliding material 24 concave step portion 25, 33 engaging surface 26 convex portion 27 thick portion 28 surface 29 groove 30 ridge 31 support plate 32 tongue portion 34 window portion 35 rotating drum

Claims (1)

[Scope of utility model registration request] 1. A plurality of bearing members 21 are mounted side by side in the circumferential direction on an inner surface of a cylindrical support plate 31, and the bearing members 21 are attached to an outer peripheral rubber-like elastic body 22 and an inner peripheral sliding member 2.
3 is a bearing for a rotary drum having a two-layer structure, in which a pair of concave step portions 24 are provided at an end portion of the rubber-like elastic body 22 in the circumferential direction, and the concave step portion 24 is provided on an inner surface of the support plate 31. Is provided with a pair of tongue pieces 32 having a substantially L-shaped cross-section, and the recessed step portion 24 and the tongue piece 32 are provided with flat engagement surfaces 25 and 33 which engage with each other in the circumferential direction. A bearing for a rotating drum, which is characterized in that