Plane groove belt pulley for washing machine

Abstract

The utility model relates to the technical field of belt pulleys, in particular to a plane groove belt pulley for a washing machine, which comprises a belt pulley body, a belt outer ring is integrally connected outside the belt pulley body, and a first reinforcing rib is integrally connected between the upper end face of the belt pulley body and the belt outer ring. A shaft sleeve hole is formed in the middle of the upper end face of the belt wheel body, a shaft sleeve body is installed in the shaft sleeve hole, a second reinforcing rib is connected between the shaft sleeve hole and the shaft sleeve body in a clamped mode, and a limiting assembly is arranged between the shaft sleeve hole and the shaft sleeve body. By designing the limiting assembly, stable combination between the shaft sleeve body and the belt wheel body can be guaranteed, and the shaft sleeve body and the belt wheel body are not prone to falling off and sliding in the follow-up using process.

Description

Technical Field

[0001] The utility model relates to the technical field of pulleys, in particular to a plane groove pulley for a washing machine. Background Art

[0002] There are three main solutions for pulleys used in existing washing machines:

[0003] ① Aluminum alloy pulley: Using the strength and rigidity of aluminum alloy materials, it is formed by aluminum die casting, cut and shaped after forming, and finally subjected to secondary machining (the surface of the pulley hanging the belt needs turning, and the shaft hole needs secondary boring). The advantages are mature production technology and good strength and rigidity of aluminum alloy materials; the disadvantages are complex production process and high material cost;

[0004] ② Sheet metal pulley: Through 1 layer of iron plate or 2 layers of iron plate, stamping into the shape of a pulley. Considering the strength and rigidity requirements of the pulley, the thickness of the iron plate is usually thicker when making 1 layer of iron plate, ≥1.5mm; the 2 layers of iron plate are assembled into one by rivets or screws, which can reduce the thickness of the iron plate. The advantage is that the cost is slightly lower than that of the aluminum alloy pulley solution; the disadvantage is that the production is more difficult. The thicker sheet material is stamped into the shape of a pulley, and the surface slope of the hanging belt (theoretically, no slope is best) needs to be minimized, and the mold and production are more difficult.

[0005] ③ Plastic pulley: usually made of nylon + glass fiber material injection molding, there will be metal inserts at the joint between the pulley and the shaft. The advantage is that the cost is slightly lower than that of the aluminum alloy pulley solution; the disadvantage is that the pulley strength and rigidity are poor, the pulley mass production size fluctuations are large, especially the warping deformation fluctuations are large, which can easily cause the belt to fall off when the washing machine is working. Moreover, the surface of the plastic pulley hanging belt is not as smooth as the aluminum alloy and sheet metal pulley solutions, and the belt wears quickly. Summary of the invention

[0006] The utility model aims to provide a flat groove pulley for a washing machine to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat groove pulley for a washing machine, comprising a pulley body, a belt outer ring is integrally connected to the outside of the pulley body, a reinforcing rib is integrally connected between the upper end surface of the pulley body and the belt outer ring, a sleeve hole is opened in the middle of the upper end surface of the pulley body, a sleeve body is installed in the sleeve hole, a reinforcing rib is clamped and connected between the sleeve hole and the sleeve body, and a limiting component is arranged between the sleeve hole and the sleeve body.

[0008] Preferably, a reinforcing rib three is fixedly connected between the lower end surface of the pulley body and the outer ring of the belt.

[0009] Preferably, an upper end surface of the sleeve body is provided with an axis groove, and the limiting assembly is located inside the axis groove.

[0010] Preferably, a hole groove is formed on the outside of the pulley body.

[0011] Preferably, the limiting assembly comprises a movable groove provided in the shaft sleeve body, an embedding groove communicating with the movable groove is provided on the inner wall of the shaft sleeve body, and the movable groove is vertically distributed to the embedding groove.

[0012] Preferably, a limiting rod is movably connected in the movable groove, and an extrusion block is fixed to one end of the limiting rod close to the embedding groove.

[0013] Preferably, the extrusion block is designed to be inclined at an angle to match the embedding groove.

[0014] Preferably, a limiting hole is provided at a position corresponding to the inner wall of the shaft sleeve hole and the movable groove, and the limiting hole matches the limiting rod.

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

[0016] The entire pulley is made of BMC material, and the high molding precision of BMC material is utilized to ensure the design requirements of the pulley outer ring diameter, roundness and pulley end runout.

[0017] BMC material has great advantages in strength and rigidity. The new BMC pulley has a main body thickness of ≥1.5mm and an outer diameter of ≤400mm. Its overall rigidity can meet the working requirements, and it has little deformation during work, and the belt is not prone to falling off.

[0018] The surface of the BMC pulley is smoother and has a higher surface hardness, which reduces the wear between the pulley and the belt (rubber), thus extending the service life of the belt and having a significant improvement effect.

[0019] The BMC pulley can be directly made of BMC material or inlaid with an insert when it is installed on the inner shaft of the washing machine. The insert includes but is not limited to aluminum alloy inserts, powder metallurgy inserts, sheet metal inserts, ceramic inserts, etc.

[0020] Pulleys made of BMC materials can be made into an integral sealing surface support structure or a hollow lightweight design on the pulley surface, depending on the design requirements of different outer diameter dimensions and pulley spans, as well as the needs of being applied to washing machines of different capacities, thereby balancing the performance indicators and material costs of the pulley.

[0021] BMC material pulleys have low material cost and are simple and stable to produce. They can be made by BMC injection molding or compression molding, followed by simple burr removal. The automated production is simple and has excellent performance when used on washing machine pulleys.

[0022] The present application can ensure the stability of the connection between the sleeve body and the pulley body by designing a limit assembly, so that they are not easy to fall off or slide during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is the overall structural view of the utility model;

[0025] Figure 2 This is a rear view of the overall structure of the utility model;

[0026] Figure 3 It is a front view of the overall structure of the utility model;

[0027] Figure 4 This is a structural view of the limit assembly of the utility model;

[0028] Figure 5 This is a combined view of the extrusion block and the limiting rod of the utility model.

[0029] Description of reference numerals:

[0030] 1. Pulley body; 2. Hole groove; 3. Bushing hole; 4. Bushing groove; 5. Reinforcement rib 1; 6. Reinforcement rib 2; 7. Limit rod; 8. Reinforcement rib 3; 9. Belt outer ring; 10. Bushing body; 11. Movable groove; 12. Limit hole; 13. Embedded groove; 14. Extrusion block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figures 1 to 5 , the utility model provides a technical solution:

[0033] A flat groove pulley for a washing machine comprises a pulley body 1, an outer belt ring 9 is integrally connected to the outside of the pulley body 1, a reinforcing rib 5 is integrally connected between the upper end surface of the pulley body 1 and the belt outer ring 9, a sleeve hole 3 is opened in the middle of the upper end surface of the pulley body 1, a sleeve body 10 is installed in the sleeve hole 3, a reinforcing rib 2 6 is snap-connected between the sleeve hole 3 and the sleeve body 10, a limiting assembly is arranged between the sleeve hole 3 and the sleeve body 10, and a reinforcing rib 3 8 is fixedly connected between the lower end surface of the pulley body 1 and the belt outer ring 9.

[0034] The design of the reinforcing rib 1 5, the reinforcing rib 2 6, and the reinforcing rib 3 8 can ensure the overall strength of the device.

[0035] The upper end surface of the sleeve body 10 is provided with a shaft groove 4 , and the limiting assembly is located inside the shaft groove 4 .

[0036] A hole groove 2 is formed on the outside of the pulley body 1 .

[0037] The limiting assembly includes a movable groove 11 opened in the sleeve body 10, and the inner wall of the sleeve body 10 is provided with an embedded groove 13 connected to the movable groove 11, and the movable groove 11 is vertically distributed with the embedded groove 13. The movable groove 11 is movably connected with a limiting rod 7, and an extrusion block 14 is fixed to one end of the limiting rod 7 close to the embedded groove 13, and the extrusion block 14 is designed to be consistent with the embedded groove 13 at an inclined angle. A limiting hole 12 is opened at a position corresponding to the inner wall of the sleeve hole 3 and the movable groove 11, and the limiting hole 12 matches the limiting rod 7.

[0038] Working principle: When working, the user installs and fixes the sleeve body 10 inside the sleeve hole 3, then inserts the drive motor output shaft (matched with the shaft groove 4) into the shaft groove 4, and squeezes the extrusion block 14. Under the action of the inclined surface of the extrusion block 14, it gradually moves to the inside of the embedded groove 13, and drives the limit rod 7 in the movable groove 11, so that one end of the limit rod 7 is inserted into the inside of the limit hole 12, and the sleeve body 10 is connected and fixed with the sleeve hole 3. The user can design multiple sets of limit components according to the use requirements to ensure stable connection.

[0039] Specific requirements and usage parameters:

[0040] If there is no need to disassemble the sleeve body, the entire application can be prepared by BMC injection molding or compression molding.

[0041] The side of the pulley of the present application can be an integral non-hollow structure, or it can be designed with a hollow scheme according to design requirements, and it can also be designed with reinforcing ribs.

[0042] This application may be with or without inserts, and the types of inserts include but are not limited to aluminum alloy, zinc-aluminum alloy, powder metallurgy, sheet metal, ceramics, etc. The shape of the hole is matched according to the shape of the shaft, including but not limited to approximate square, polygonal, toothed, etc.

[0043] The wall thickness of the pulley body is ≥1.5mm, the outer diameter is ≤400mm, and the width of the belt hanging surface is between 5mm and 40mm.

[0044] The pulley material is BMC, and the molding method can be injection molding or compression molding.

[0045] Use BMC materials to make pulleys for washing machines;

[0046] ② The molding method can be compression molding or injection molding, which is determined according to the pulley structure plan, performance requirements, production requirements, and investment scale;

[0047] ③ The wall thickness of the pulley body is ≥1.5mm to ensure the strength of the pulley; the outer diameter is designed according to the needs of the washing machine product, generally within 400mm; the width of the pulley hanging belt surface is between 5mm and 40mm;

[0048] ④ At the matching hole between the pulley and the shaft, because the BMC material has high hardness, it can be directly matched with the BMC formed hole and the shaft without inserts, or inserts can be added. The inserts can be but not limited to aluminum alloy, zinc-aluminum alloy, powder metallurgy, sheet metal, ceramics, etc. The shape of the hole matches the shape of the shaft, including but not limited to approximate square, polygonal, toothed, etc.;

[0049] ⑤ The side of the pulley can be a whole non-hollow structure, or it can be designed with a hollow scheme according to design needs, or it can be designed with reinforcing ribs

[0050] The BMC pulley of the present invention is simple to produce and is stable and reliable. The pulley has good strength and rigidity, low material and production costs, and reduces belt wear to a minimum, which is beneficial to extending the service life of the washing machine belt. The size is stable and consistent during mass production, and mass production is greatly improved.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A flat groove pulley for a washing machine, comprising a pulley body (1) made of BMC material, characterized in that: The pulley body (1) is integrally connected to the outside with a belt outer ring (9); a reinforcing rib (5) is integrally connected between the upper end surface of the pulley body (1) and the belt outer ring (9); a shaft sleeve hole (3) is opened in the middle of the upper end surface of the pulley body (1); a shaft sleeve body (10) is installed in the shaft sleeve hole (3); a reinforcing rib (6) is snap-fitted and connected between the shaft sleeve hole (3) and the shaft sleeve body (10); and a limiting component is arranged between the shaft sleeve hole (3) and the shaft sleeve body (10).

2. A flat groove pulley for a washing machine according to claim 1, characterized in that: A reinforcing rib three (8) is fixedly connected between the lower end surface of the pulley body (1) and the belt outer ring (9).

3. A flat groove pulley for a washing machine according to claim 2, characterized in that: The upper end surface of the shaft sleeve body (10) is provided with a shaft groove (4), and the limiting component is located inside the shaft groove (4).

4. A flat groove pulley for a washing machine according to claim 3, characterized in that: A hole groove (2) is formed on the outside of the pulley body (1).

5. A flat groove pulley for a washing machine according to claim 4, characterized in that: The limiting assembly comprises a movable groove (11) provided in the shaft sleeve body (10); an embedding groove (13) communicating with the movable groove (11) is provided on the inner wall of the shaft sleeve body (10); and the movable groove (11) and the embedding groove (13) are arranged vertically.

6. A flat groove pulley for a washing machine according to claim 5, characterized in that: A limiting rod (7) is movably connected in the movable groove (11), and an extrusion block (14) is fixed to one end of the limiting rod (7) close to the embedding groove (13).

7. A flat groove pulley for a washing machine according to claim 6, characterized in that: The extrusion block (14) is designed to be inclined and to match the embedding groove (13).

8. A flat groove pulley for a washing machine according to claim 7, characterized in that: A limiting hole (12) is provided at a position corresponding to the inner wall of the shaft sleeve hole (3) and the movable groove (11), and the limiting hole (12) matches the limiting rod (7).

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