Pulley for steel sliding door cabinet

Abstract

The utility model discloses a pulley for a steel sliding door cabinet, which comprises a central shaft, an inner ring, a plurality of balls, a metal outer ring and a plastic ring coated on the outer side of the metal outer ring, the inner ring is sleeved on the outer side of the central shaft, the metal outer ring is in running fit with the inner ring through the balls, and the plastic ring is sleeved on the outer side of the metal outer ring. An annular groove is formed in the outer side face of the plastic ring. The utility model has the advantages of better stability and longer service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware accessories, in particular to a pulley for a steel sliding door cabinet. Background Art

[0002] Steel sliding door cabinet is a storage cabinet made of steel and equipped with sliding doors (sliding doors). It is widely used in offices, homes, schools and other environments where files and items need to be stored. The upper and lower sides of the sliding door are generally provided with a rotating seat, on which a pulley is rotatably provided, and a slide rail is provided on the storage cabinet, and the pulley slides with the slide rail.

[0003] Conventionally, the pulley on the sliding door generally includes a central shaft, an inner ring, multiple balls and an outer ring. The central shaft is used to connect with the rotating seat. The inner ring is sleeved on the outside of the central shaft. The outer ring and the inner ring are rotated and matched through multiple balls. The outer surface of the outer ring is provided with an annular groove for matching with the slide rail. Among them, the outer ring is generally made by plastic coating process. There is a certain tolerance between the outer ring and the ball. It is easy to shake during use. The stability needs to be improved. The outer ring made of plastic has poor wear resistance. Since the sliding door itself is heavy, the roller located on the lower side of the sliding door rubs against the slide rail on the outer ring of the annular groove during use, and the inner side of the outer ring rubs against the ball. The wear is fast and the service life needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pulley for a steel sliding door cabinet, which has good stability and long service life.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a pulley for a steel sliding door cabinet, comprising a central shaft, an inner ring, a plurality of balls, a metal outer ring and a plastic ring coated on the outside of the metal outer ring, the inner ring is sleeved on the outside of the central shaft, the metal outer ring and the inner ring are rotatably matched through the plurality of balls, and an annular groove is provided on the outer side of the plastic ring.

[0006] Preferably, the length of the plastic ring along the axial direction is greater than the length of the metal outer ring along the axial direction.

[0007] Preferably, two limiting rings are integrally provided on the plastic ring, and the metal outer ring is sandwiched between the two limiting rings.

[0008] Preferably, a retaining frame is provided between the inner ring and the metal outer ring, and a plurality of mounting holes are provided on the retaining frame. The plurality of mounting holes correspond one-to-one to the plurality of ball bearings, and the ball bearings are rollingly arranged at the corresponding mounting holes.

[0009] Preferably, the retaining frame comprises a first circular ring, a second circular ring is fixedly provided at one end of the first circular ring, and a plurality of the mounting holes are provided on the second circular ring.

[0010] Preferably, one of the limiting rings extends inwardly to form a limiting ring, and the first circular ring is located between the limiting convex ring and the ball.

[0011] Preferably, a plurality of spherical grooves are provided on the inner side surface of the metal outer ring, and the plurality of spherical grooves correspond one-to-one to a plurality of ball bearings, and parts of the ball bearings extend into the corresponding spherical grooves.

[0012] Preferably, a plurality of first protrusions are fixedly provided on the outer surface of the metal outer ring, and the plurality of first protrusions are equally spaced along the circumferential direction. A plurality of first grooves are provided on the inner surface of the plastic ring, and the plurality of first grooves correspond one-to-one to the plurality of first protrusions, and the first protrusions are inserted into the corresponding first grooves.

[0013] Preferably, the first protrusion is in a strip shape, and the first protrusion extends along the axial direction of the metal outer ring.

[0014] Preferably, a plurality of second grooves are provided on the outer surface of the metal outer ring, and the plurality of second grooves are evenly spaced along the circumferential direction. A plurality of second protrusions are integrally provided on the inner surface of the plastic ring, and the plurality of second protrusions correspond one-to-one to the plurality of second grooves, and the second protrusions are inserted into the corresponding second grooves.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] 1. By setting the metal outer ring, the structural strength of the metal outer ring is higher, the processing accuracy is easy to control, the precision is higher, the degree of fit between the metal outer ring and the ball is better, it is not easy to shake during use, and the stability is better;

[0017] 2. The metal outer ring is made of metal material with good wear resistance. It is not easy for the metal outer ring and the ball to wear. The inner side of the rubber ring fits tightly with the metal outer ring. The rubber ring cooperates with the slide rail on the storage cabinet through the annular groove. Compared with the conventional structure, the wear rate of the rubber ring is greatly reduced, which is conducive to extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 The cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 3This is a schematic diagram of the structure of the plastic ring in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the retainer in the utility model;

[0022] Figure 5 The cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 6 The cross-sectional structure of the utility model is shown in FIG. Figure 3 .

[0024] In the figure: 1, center axis; 2, inner ring; 3, ball; 4, metal outer ring; 41, spherical groove; 42, first protrusion; 43, second groove; 5, plastic ring; 51, annular groove; 52, limit ring; 53, limit ring; 54, first groove; 55, second protrusion; 6, retaining frame; 61, mounting hole; 62, first circular ring; 63, second circular ring. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] Embodiment 1: Figures 1 to 3 As shown, a pulley for a steel sliding door cabinet includes a central shaft 1, an inner ring 2, a plurality of balls 3, a metal outer ring 4 and a plastic ring 5 coated on the outside of the metal outer ring 4. The central shaft 1 is used to cooperate with a rotating seat on the sliding door, the inner ring 2 is sleeved on the outside of the central shaft 1, the inner side of the metal outer ring 4 and the outer side of the inner ring 2 are rotatably matched through a plurality of balls 3, and an annular groove 51 is provided on the outer surface of the plastic ring 5.

[0028] In this embodiment, the length of the plastic ring 5 along the axial direction is greater than the length of the metal outer ring 4 along the axial direction.

[0029] In this embodiment, two limiting rings 52 are integrally provided on the plastic ring 5. The two limiting rings 52 are both located on the inner side of the plastic ring 5. The metal outer ring 4 is clamped between the two limiting rings 52. The design of the limiting rings 52 helps to improve the tightness of the fit between the plastic ring 5 and the metal outer ring 4, and can prevent the plastic ring 5 from shaking, which helps to improve the stability of the structure.

[0030] In this embodiment, a plurality of spherical grooves 41 are provided on the inner side surface of the metal outer ring 4. The plurality of spherical grooves 41 correspond one-to-one to the plurality of balls 3. Parts of the balls 3 extend into the corresponding spherical grooves 41, which helps to improve the fit.

[0031] Embodiment 2: Figures 2 to 4 As shown, the rest of the parts are the same as those of the first embodiment, the difference being that a retaining frame 6 is provided between the inner ring 2 and the metal outer ring 4, and a plurality of mounting holes 61 are provided on the retaining frame 6, and the plurality of mounting holes 61 correspond one by one to the plurality of balls 3, and the balls 3 are rollingly arranged at the corresponding mounting holes 61.

[0032] In this embodiment, the retaining frame 6 includes a first circular ring 62 , a second circular ring 63 is fixedly disposed at one end of the first circular ring 62 , and a plurality of mounting holes 61 are disposed on the second circular ring 63 .

[0033] In this embodiment, a limiting ring 52 extends inward to form a limiting ring 53, and the first circular ring 62 is located between the limiting convex ring and the ball 3. After being coated, the limiting ring 53 can limit the retaining frame 6 between the metal outer ring 4 and the inner ring 2, and the reliability is good.

[0034] Embodiment 3: Figure 5 As shown, the rest of the parts are the same as those in the first embodiment, except that a plurality of first protrusions 42 are fixedly provided on the outer surface of the metal outer ring 4, and the plurality of first protrusions 42 are evenly spaced along the circumferential direction, and a plurality of first grooves 54 are provided on the inner surface of the plastic ring 5, and the plurality of first grooves 54 correspond one by one to the plurality of first protrusions 42, and the first protrusions 42 are inserted into the corresponding first grooves 54.

[0035] In this embodiment, the first protrusion 42 is in a strip shape, and the first protrusion 42 extends along the axial direction of the metal outer ring 4 .

[0036] Embodiment 4: Figure 6 As shown, the rest of the parts are the same as those in the first embodiment, except that a plurality of second grooves 43 are arranged on the outer surface of the metal outer ring 4, and the plurality of second grooves 43 are evenly spaced along the circumferential direction, and a plurality of second protrusions 55 are integrally arranged on the inner side surface of the plastic ring 5, and the plurality of second protrusions 55 correspond one-to-one to the plurality of second grooves 43, and the second protrusions 55 are inserted into the corresponding second grooves 43.

[0037] In this embodiment, the second groove 43 is a strip groove, and the strip groove extends along the axial direction of the metal outer ring 4 .

[0038] The arrangement of the first protrusion 42 , the first groove 54 , the second protrusion 55 , and the second groove 43 helps to improve the tightness of the fit between the metal outer ring 4 and the plastic ring 5 , and improves the stability of the structure.

[0039] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A pulley for a steel sliding door cabinet, comprising a central shaft (1), an inner ring (2) and a plurality of balls (3), characterized in that It also includes a metal outer ring (4) and a plastic ring (5) coated on the outside of the metal outer ring (4); the inner ring (2) is sleeved on the outside of the central axis (1); the metal outer ring (4) and the inner ring (2) are rotatably engaged via a plurality of balls (3); and an annular groove (51) is provided on the outer surface of the plastic ring (5).

2. The pulley for a steel sliding door cabinet according to claim 1, characterized in that The length of the plastic ring (5) along the axial direction is greater than the length of the metal outer ring (4) along the axial direction.

3. The pulley for a steel sliding door cabinet according to claim 1, characterized in that Two limiting rings (52) are integrally arranged on the plastic ring (5), and the metal outer ring (4) is clamped between the two limiting rings (52).

4. The pulley for a steel sliding door cabinet according to claim 3, characterized in that A retaining frame (6) is arranged between the inner ring (2) and the metal outer ring (4), and a plurality of mounting holes (61) are arranged on the retaining frame (6). The plurality of mounting holes (61) correspond one-to-one to the plurality of balls (3), and the balls (3) are rollingly arranged at the corresponding mounting holes (61).

5. The pulley for a steel sliding door cabinet according to claim 4, characterized in that The retaining frame (6) comprises a first circular ring (62), a second circular ring (63) is fixedly arranged at one end of the first circular ring (62), and a plurality of mounting holes (61) are arranged on the second circular ring (63).

6. The pulley for a steel sliding door cabinet according to claim 5, characterized in that One of the limiting rings (52) extends inwardly to form a limiting ring (53), and the first circular ring (62) is located between the limiting ring (53) and the ball (3).

7. The pulley for a steel sliding door cabinet according to claim 1, characterized in that A plurality of spherical grooves (41) are arranged on the inner side surface of the metal outer ring (4), and the plurality of spherical grooves (41) correspond one-to-one to a plurality of balls (3), and parts of the balls (3) extend into the corresponding spherical grooves (41).

8. The pulley for a steel sliding door cabinet according to claim 1, characterized in that A plurality of first protrusions (42) are fixedly arranged on the outer surface of the metal outer ring (4), and the plurality of first protrusions (42) are evenly spaced along the circumferential direction. A plurality of first grooves (54) are arranged on the inner surface of the plastic ring (5), and the plurality of first grooves (54) correspond one-to-one to the plurality of first protrusions (42), and the first protrusions (42) are inserted into the corresponding first grooves (54).

9. The pulley for a steel sliding door cabinet according to claim 8, characterized in that The first protrusion (42) is in the shape of a strip, and the first protrusion (42) extends along the axial direction of the metal outer ring (4).

10. The pulley for a steel sliding door cabinet according to claim 1, characterized in that A plurality of second grooves (43) are arranged on the outer surface of the metal outer ring (4), and the plurality of second grooves (43) are distributed at equal intervals along the circumferential direction. A plurality of second protrusions (55) are integrally arranged on the inner surface of the plastic ring (5), and the plurality of second protrusions (55) correspond one-to-one to the plurality of second grooves (43), and the second protrusions (55) are inserted into the corresponding second grooves (43).

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