One-way bearing for washing machine

Abstract

The present invention discloses a one-way bearing for a washing machine, comprising an outer ring of a bearing, a Z-shaped frame, an inner retaining ring, a plurality of rolling elements and an inner ring of the bearing, wherein a straight raceway is provided on the inner ring of the bearing, a plurality of rolling elements are installed on the straight raceway, and the rolling elements can roll along the straight raceway, the outer ring of the bearing and the inner ring of the bearing are installed concentrically, a limiting groove, a plurality of rolling wedges and a limiting oblique block are provided on the inner side of the outer ring of the bearing, and the rolling elements cooperate with the rolling wedges and the limiting oblique block when rolling, a Z-shaped frame is installed between adjacent rolling elements, the Z-shaped frame cooperates with the inner retaining ring, and the inner retaining ring also cooperates with the outer ring of the bearing; beneficial effects: the contact between the baffle and the rolling element changes the surface contact to the line contact, thereby reducing the friction force when the rolling element rotates and improving the working performance of the bearing; the detachable Z-shaped frame reduces the difficulty of assembly and improves the production efficiency, while ensuring that the bearing can continue to rotate and lock when the life limit of the bearing is reached, thereby providing sufficient maintenance time; the rolling bearing is increased and the rigidity of the clutch output shaft is improved.

Description

Technical Field

[0001] The present invention relates to the field of bearings, and in particular to a one-way bearing for a washing machine. Background Art

[0002] The deceleration clutch is one of the important parts of an automatic washing machine. The deceleration clutch ensures the start and stop of the washing machine during the washing process. The most common deceleration clutch at present is the one-way overrunning deceleration clutch, and its core component is the overrunning clutch, which is a one-way bearing specially used for washing machines.

[0003] A one-way bearing, also known as an overrunning clutch, is a bearing that can rotate freely in one direction but is locked in the other. Existing one-way bearings are primarily composed of a metal shell containing numerous rollers, needle rollers, or balls. The cage is wedge-shaped, and a spring is also provided on the cage to ensure that the rolling element can only roll along the cage direction, while significant resistance is generated in the other direction. Existing one-way bearings require a relatively compact assembly of the rolling element and the rolling seat, making the assembly process more difficult. Furthermore, the spring on the rolling seat is susceptible to deformation under stress, and when the rolling element wears, the bearing can easily become locked and fail, leading to mechanical accidents. Summary of the Invention

[0004] In response to the above-mentioned background technology, the present invention provides a one-way bearing for a washing machine. The retaining frame is replaced by a detachable elastic structure, which greatly reduces the difficulty of assembly while increasing the life of the bearing and can also provide a buffering effect when the bearing is worn.

[0005] In order to solve the above technical problems, the present invention is solved through the following technical solutions: a one-way bearing for a washing machine, comprising a bearing outer ring, a Z-shaped frame, an inner retaining ring, a plurality of rolling elements and a bearing inner ring, the bearing inner ring being provided with a straight raceway, a plurality of rolling elements being installed on the straight raceway, the rolling elements being able to roll along the straight raceway, the bearing outer ring being concentrically installed with the bearing inner ring, a limiting slot, a plurality of rolling wedges and a limiting bevel being provided on the inner side of the bearing outer ring, the rolling elements cooperating with the rolling wedges and the limiting bevel when rolling, the Z-shaped frame being installed between adjacent rolling elements, spring plates being provided at both ends of the Z-shaped frame, the inner retaining ring cooperating with the bearing outer ring through the limiting slot, the inner retaining ring being provided with a limiting hole, the spring plate cooperating with the limiting hole.

[0006] Preferably, the Z-shaped frame is further provided with a straight plate, a connecting plate and a baffle, the spring plate is fixed at both ends of the straight plate, arc-shaped plates are connected on both sides of the straight plate, one end of the straight plate is connected to one end of the connecting plate through the spring plate, and the other end of the connecting plate is connected to the baffle, and the rolling body contacts the baffle when rolling.

[0007] Preferably, the inner side of the bearing outer ring has a limiting groove and a retaining groove, and outer retaining rings are installed at both ends of the bearing outer ring, and the outer surface of the outer retaining ring cooperates with the retaining groove.

[0008] Preferably, the bearing inner ring is further provided with an arc raceway and a fixing groove, a plurality of balls are mounted on the arc raceway, a retaining frame is mounted on the plurality of balls, and the fixing groove cooperates with the inner surface of the outer retaining ring.

[0009] Preferably, a limiting protrusion is further provided on the inner retaining ring, and the limiting protrusion cooperates with the limiting groove on the outer ring of the bearing.

[0010] Preferably, the minimum gap between the rolling wedge and the inner ring of the bearing is smaller than the diameter of the rolling body to ensure that the rolling body is locked, and the maximum gap between the rolling wedge and the inner ring of the bearing is larger than the diameter of the rolling body to ensure that the rolling body can rotate freely.

[0011] Preferably, the gap between the limiting bevel block and the inner ring of the bearing is smaller than the diameter of the rolling element.

[0012] The beneficial effects of the present invention are as follows: through the contact between the baffle and the rolling body, the surface contact is changed to line contact, which greatly reduces the friction force when the rolling body rotates, thereby improving the working performance of the bearing; the detachable Z-shaped frame greatly reduces the difficulty of assembling the rolling body, thereby improving production efficiency; the arc side plates on both sides of the baffle on the Z-shaped frame ensure that the bearing can continue to rotate and lock when it reaches the life limit and fails, thereby providing sufficient maintenance time for the machine; adding rolling bearings improves the rigidity of the output shaft of the washing machine clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0015] Figure 3 It is a front view sectional view of the present invention.

[0016] Figure 4 It is a schematic diagram of a Z-shaped frame of the present invention.

[0017] Figure 5 It is a schematic diagram of the Z-shaped frame in the compressed state of the present invention.

[0018] Figure 6 Schematic diagram of the outer ring of the present invention.

[0019] Figure 7 It is a structural schematic diagram of the inner retaining ring of the present invention.

[0020] Figure 8 It is a schematic diagram of the structure of the bearing inner ring of the present invention.

[0021] In the figure: bearing outer ring 101, outer retaining ring 102, bearing inner ring 103, limiting groove 104, rolling wedge 105, limiting oblique block 106, limiting slot 107, retaining groove 108, inner retaining ring 201, limiting protrusion 202, limiting hole 203, Z-shaped frame 301, straight plate 302, connecting plate 303, retaining plate 304, spring plate 305, arc plate 306, ball 401, retaining frame 402, arc raceway 403, fixed groove 404, straight raceway 405, rolling element 5. DETAILED DESCRIPTION

[0022] The following will provide a clear and complete description of the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments described in the present invention, all other embodiments derived by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-8 As shown, a one-way bearing for a washing machine includes a bearing outer ring 101, a Z-shaped frame 301, an inner retaining ring 201 and a bearing inner ring 103. The bearing inner ring 103 is provided with a straight raceway 405, and a plurality of rolling elements 5 are installed on the straight raceway 405. The rolling elements 5 can roll along the straight raceway 405. The bearing outer ring 101 is installed concentrically with the bearing inner ring 103. The inner side of the bearing outer ring 101 is provided with a limit groove 107, a plurality of rolling elements 5, and a plurality of rolling elements 5 can roll along the straight raceway 405. The wedge block 105 and the limiting bevel block 106 cooperate with the rolling wedge block 105 and the limiting bevel block 106 when the rolling body 5 rolls. The Z-shaped frame 301 is installed between the adjacent rolling bodies 5. Spring plates 305 are provided at both ends of the Z-shaped frame 301. The inner retaining ring 201 cooperates with the bearing outer ring 101 through the limiting slot 107. The inner retaining ring 201 is provided with a limiting hole 203, and the spring plate 305 cooperates with the limiting hole 203.

[0024] The Z-shaped frame 301 is also provided with a straight plate 302, a connecting plate 303 and a baffle 304. The spring plate 305 is fixed at both ends of the straight plate 302. Arc plates 306 are connected to both sides of the straight plate 302. One end of the straight plate 302 is connected to one end of the connecting plate 303 through the spring plate 305, and the other end of the connecting plate 303 is connected to the baffle 304. The rolling body 5 contacts the baffle 304 when rolling.

[0025] The inner side of the bearing outer ring 101 has a limiting groove 104 and a retaining groove 108 . Outer retaining rings 102 are installed at both ends of the bearing outer ring 101 . The outer surface of the outer retaining ring 102 cooperates with the retaining groove 108 .

[0026] The bearing inner ring 103 is further provided with an arc raceway 403 and a fixing groove 404 . A plurality of balls 401 are mounted on the arc raceway 403 . A retaining frame 402 is mounted on the plurality of balls 401 . The fixing groove 404 cooperates with the inner surface of the outer retaining ring 102 .

[0027] The inner retaining ring 201 is further provided with a limiting protrusion 202 , and the limiting protrusion 202 cooperates with the limiting groove 104 on the bearing outer ring 101 .

[0028] The minimum gap between the rolling wedge 105 and the bearing inner ring 103 must be smaller than the diameter of the rolling body 5 to ensure that the rolling body 5 is locked. The maximum gap between the rolling wedge 105 and the bearing inner ring 103 must be larger than the diameter of the rolling body 5 to ensure that the rolling body 5 can rotate freely.

[0029] The gap between the limiting bevel block 106 and the bearing inner ring 103 is smaller than the diameter of the rolling element 5 .

[0030] Specific working process: when the washing machine is started, the motor drives the washing machine overrunning clutch to work. At this time, the one-way bearing rotates in the direction of freedom, and the rolling body rolls along the straight raceway toward the direction of the compressed Z-shaped frame. Since the gap between the rolling wedge block in the direction of the compressed Z-shaped frame and the inner ring of the bearing is larger than the diameter of the rolling body, the rolling body begins to rotate after compressing the Z-shaped frame to a certain extent. As the output power increases, the rolling body continues to compress the Z-shaped frame to the position of the limiting bevel block. The gap between the limiting bevel block and the inner ring of the bearing is smaller than the diameter of the rolling body. At this time, the rolling body rotates along the oblique side of the limiting bevel block. At this time, the two ends of the Z-shaped frame are in a stuck state through the spring block and the inner retaining ring; compared with the one-way bearing of the prior art, there is only line contact between the rolling body and the Z-shaped frame at this time, and its friction is greatly reduced compared with the one-way bearing of the prior art. At the same time, the contact is evenly distributed. Compared with the spring retainer structure of the prior art, it avoids the occurrence of jamming due to uneven force on the spring, thereby improving the stability of the bearing operation.

[0031] When the washing machine needs to be stopped, the one-way bearing rotates in the opposite direction and the compression of the Z-shaped frame is released. At this time, the rolling body moves to a position where the gap between the rolling wedge and the inner ring of the bearing is small due to the friction between the Z-shaped frame and the inner and outer rings of the bearing. As the gap decreases, the contact pressure of the rolling body becomes greater and greater, and the bearing is locked. Compared with the wear and jam failure of the retaining frame, when the rolling body or the rolling wedge fails, the rolling body of the present invention will continue to move to contact the next Z-shaped frame baffle under the elastic force of the Z-shaped frame. At this time, the rolling body is locked by the side plates on both sides of the baffle of the next Z-shaped frame, which greatly improves the safety of the one-way bearing.

[0032] Compared with the one-way bearing with a retainer, the Z-shaped frame of the present invention is detachable. When installing the bearing, the rolling body can be easily placed in the Z-shaped frame by lightly pressing the Z-shaped frame. The rolling body and the Z-shaped frame are installed in sequence to complete the assembly process. Compared with the one-way bearing with a retainer, the installation difficulty is greatly reduced, and the production efficiency is greatly improved.

[0033] Since the output shaft of the washing machine clutch is long, if a large error occurs during assembly, the output shaft will produce a large deflection when rotating, which will cause the one-way bearing to receive a radial cyclic swing load, thereby greatly reducing the service life of the bearing. The integration of rolling bearings and one-way bearings increases the rotational stiffness of the contact part between the output shaft and the one-way bearing, thereby improving the smoothness of operation and the service life of the bearings.

Claims

1. A one-way bearing for a washing machine, comprising a bearing outer ring (101), a Z-shaped frame (301), an inner retaining ring (201), a plurality of rolling elements (5) and a bearing inner ring (103), characterized in that: The bearing inner ring (103) is provided with a straight raceway (405), and a plurality of rolling bodies (5) are installed on the straight raceway (405). The rolling bodies (5) can roll along the straight raceway (405). The bearing outer ring (101) is installed concentrically with the bearing inner ring (103). The inner side of the bearing outer ring (101) is provided with a limit slot (107), a plurality of rolling wedges (105) and a limit bevel (106). When the rolling bodies (5) roll, they cooperate with the rolling wedges (105) and the limit bevel (106). The Z-shaped frames (301) are installed between adjacent rolling bodies (5). Spring plates (305) are provided at both ends of the Z-shaped frame (301). The inner retaining ring (201) The inner retaining ring (201) is matched with the bearing outer ring (101) through a limiting slot (107), a limiting hole (203) is provided on the inner retaining ring (201), and the spring plate (305) is matched with the limiting hole (203). The Z-shaped frame (301) is also provided with a straight plate (302), a connecting plate (303) and a baffle (304). The spring plate (305) is fixed to both ends of the straight plate (302), and arc plates (306) are connected to both sides of the straight plate (302). One end of the straight plate (302) is connected to one end of the connecting plate (303) through the spring plate (305), and the other end of the connecting plate (303) is connected to the baffle (304). When the rolling body (5) rolls, it contacts the baffle (304).

2. The one-way bearing for a washing machine according to claim 1, characterized in that: A limiting groove (104) and a retaining groove (108) are provided on the inner side of the bearing outer ring (101), and outer retaining rings (102) are installed at both ends of the bearing outer ring (101), and the outer surface of the outer retaining ring (102) cooperates with the retaining groove (108).

3. The one-way bearing for a washing machine according to claim 2, characterized in that: The bearing inner ring (103) is further provided with an arc raceway (403) and a fixing groove (404), a plurality of balls (401) are mounted on the arc raceway (403), a retaining frame (402) is mounted on the plurality of balls (401), and the fixing groove (404) cooperates with the inner surface of the outer retaining ring (102).

4. A one-way bearing for a washing machine according to claim 1 or 2, characterized in that: The inner retaining ring (201) is further provided with a limiting protrusion (202), and the limiting protrusion (202) cooperates with the upper limiting groove (104) of the bearing outer ring (101).

5. The one-way bearing for a washing machine according to claim 1, characterized in that: The minimum gap between the rolling wedge (105) and the bearing inner ring (103) is smaller than the diameter of the rolling body (5), which can ensure that the rolling body (5) is locked. The maximum gap between the rolling wedge (105) and the bearing inner ring (103) is larger than the diameter of the rolling body (5), which can ensure that the rolling body (5) can rotate freely.

6. The one-way bearing for a washing machine according to claim 1, characterized in that: The gap between the limiting bevel block (106) and the bearing inner ring (103) is smaller than the diameter of the rolling body (5).

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