Belt pulley structure
By combining hollow cylindrical toothed grooves and BMC material in the washing machine pulley design, the problems of low strength at the tooth groove position and poor overall rigidity are solved, achieving a pulley structure that is lightweight, reduces costs, and improves transmission efficiency.
Patent Information
- Application Number
- CN202520007024.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The existing washing machine pulley has low strength at the toothed groove position where it is assembled with the metal shaft in the middle. It is prone to wear and slippage, and its overall rigidity is poor, which affects the transmission effect and results in high cost.
The toothed component, which adopts a hollow columnar structure, is made of metal and has stepped teeth of varying coarse and fine ends on the outside. Combined with the pulley body made of BMC material, the meshing connection ensures fixation and increases the contact area. The toothed component is made of metal to improve mechanical strength, while the pulley body is cast from BMC material to reduce weight and lower cost.
It achieves enhanced mechanical strength of the pulley while reducing weight and cost, preventing wear and slippage, ensuring high overall rigidity, resistance to deformation under pressure, and good transmission performance.
Smart Images
Figure CN223578763U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of washing machine parts, concretely relates to a belt pulley structure. BACKGROUND
[0002] In the washing machine, the belt pulley transmits the power of the motor to the inner drum of the washing machine through the belt, drives the inner drum to rotate, realizes the function of washing and dewatering, and the belt pulley of the washing machine mainly applies cast aluminum metal material and nylon plastic at present, cast aluminum has higher mechanical strength, satisfies the mechanical property requirement of the belt pulley, however, the cost is higher, the nylon has better mechanical property among many plastics, and the good mechanical strength can be reached through the reinforced structure to satisfy the mechanical property requirement of the belt pulley, however, the strength of partial position is still difficult to reach, especially the tooth groove position of the middle of the belt pulley and the metal shaft assembly, the strength is low and easy to wear and slip, and the overall rigidity is poor, and the transmission effect is influenced, therefore, in order to avoid the shortcomings in the prior art, it is necessary to improve the prior art. SUMMARY
[0003] The utility model discloses a kind of belt pulley structures, can ensure mechanical strength under the condition of reducing weight and reducing manufacturing cost, satisfy the mechanical property requirement of belt pulley, reduce wear and slip situation, overall rigidity is strong, not easy to be compressed and deformed.
[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:
[0005] A belt pulley structure, comprising a tooth groove piece and a belt pulley body, the tooth groove piece is a hollow columnar structure, the inner side of the tooth groove piece is provided with a first tooth part, the outer side of the tooth groove piece includes a thick end and a thin end, the diameter of the thick end is greater than the diameter of the thin end, so that a first step is formed at the connection of the thick end and the thin end, a second tooth part is provided on the thick end, a third tooth part is provided on the thin end, the tooth groove piece is made of metal material, the belt pulley body is casted and formed on the outer periphery of the tooth groove piece by BMC material and forms a fourth tooth part meshing with the second tooth part and a fifth tooth part meshing with the third tooth part; the belt pulley body forms a second step at the connection of the fourth tooth part and the fifth tooth part.
[0006] As a preferred scheme of the above-mentioned belt pulley structure, a limiting ring is formed on the outer side of the thick end of the belt pulley body, which can abut against the end face of the thick end.
[0007] As a preferred scheme of the above-mentioned belt pulley structure, the inner diameter of the limiting ring is smaller than the diameter of the thick end.
[0008] As a preferred scheme of the belt pulley structure, the part of the belt pulley body surrounding the thin end is a convex cylinder, and the end face of the cylinder is flush with the end face of the thin end.
[0009] As a preferred scheme of the belt pulley structure, the belt pulley body is provided with a spoke, and the spoke is an arc structure bent to one side.
[0010] As a preferred scheme of the belt pulley structure, a round corner is arranged at the connection between the spoke and the outer ring of the belt pulley body.
[0011] As a preferred scheme of the belt pulley structure, a plurality of key grooves are arranged on the belt pulley body.
[0012] As a preferred scheme of the belt pulley structure, a plurality of through holes are arranged on the belt pulley body.
[0013] The belt pulley structure provided by the utility model has the advantages that, compared with the prior art, the belt pulley structure has the advantages that:
[0014] The tooth groove piece is of a hollow columnar structure, the inner side of the center is provided with a first tooth part for connecting with the rotating shaft, so that the belt pulley can be fixed on the shaft, the diameter of the thick end of the outer side of the tooth groove piece is larger than the diameter of the thin end, so that a first step is formed at the connection between the thick end and the thin end, the first step plays a limiting role and axially limits the tooth groove piece, so that the tooth groove piece is prevented from deviating in the axial direction, the second tooth part and the third tooth part are arranged at the thick end and the thin end respectively, so that, when the belt pulley body is cast, the fourth tooth part meshing with the second tooth part and the fifth tooth part meshing with the third tooth part are formed, the entire outer side surface of the tooth groove piece is ensured to be connected in mesh with the belt pulley body, the contact area of the tooth groove piece and the belt pulley body is increased, slippage is avoided, the belt pulley body is made of BMC material, so that the weight of the belt pulley is reduced, light weight is realized, and the manufacturing cost is reduced, the tooth groove piece needing to be connected with the rotating shaft is made of metal material, so that the mechanical strength is ensured and the mechanical performance requirement of the belt pulley is met, the tooth groove piece made of metal material is not easy to wear and slip, the overall rigidity is high, and the tooth groove piece is not easy to be deformed under pressure, the belt pulley body is cast and formed on the outer periphery of the tooth groove piece by BMC material, so that the belt pulley body and the tooth groove piece are integrated, the overall strength is high, the mechanical strength requirement of the tooth groove piece at the center is ensured, and the effects of reducing the weight and reducing the manufacturing cost are achieved. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below.
[0016] Figure 1 is the schematic view of the belt pulley structure of the utility model;
[0017] Figure 2 is the schematic view of the tooth groove piece of the utility model;
[0018] Figure 3 is the internal structure schematic view of the belt pulley structure of the utility model;
[0019] Figure 4 is Figure 3 is the local enlarged schematic view at the limit cavity;
[0020] Figure 5 is the internal structure schematic view of the belt pulley main body of the utility model;
[0021] Figure 6 is Figure 5 is the local enlarged schematic view at the limit cavity.
[0022] Markings in the figure:
[0023] 100, belt pulley main body; 110, spoke; 120, round corner; 130, through hole; 140, keyway; 150, second step; 160, cylinder; 170, fourth tooth part; 180, fifth tooth part; 190, limit cavity; 200, tooth groove; 210, first tooth part; 220, second tooth part; 230, third tooth part; 240, thick end; 250, thin end; 260, first step; 300, limit ring; 310, limit hole. DETAILED DESCRIPTION
[0024] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.
[0025] In the description of the utility model, it is understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, cannot be understood as limiting the utility model.
[0026] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0027] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting should be understood broadly, and the skilled person in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.
[0028] Please see Figures 1 to 6 , the pulley structure provided by the utility model embodiment will be described.
[0029] As Figures 1 to 6 Indicated, the utility model discloses a pulley structure, including tooth groove piece 200 and pulley main part 100, tooth groove piece 200 is hollow columnar structure, the inside of tooth groove piece 200 is provided with first tooth part 210, the outside of tooth groove piece 200 includes thick end 240 and thin end 250, the diameter of thick end 240 is greater than the diameter of thin end 250, so that the connecting place of thick end 240 and thin end 250 forms first step 260, second tooth part 220 is provided on thick end 240, third tooth part 230 is provided on thin end 250, tooth groove piece 200 is made of metal material, pulley main part 100 is by BMC material and is casted on the outer periphery of tooth groove piece 200 and forms fourth tooth part 170 and fifth tooth part 180 with second tooth part 220 and third tooth part 230 engagement.
[0030] BMC material is a kind of thermosetting plastic composite material mixed by resin, filler, plasticizer, stabilizer and other additives, BMC material has rust-proof performance, BMC material is lighter than cast aluminum, the cost of BMC material is lower than cast aluminum, BMC material is existing material, not described here.
[0031] Tooth groove piece 200 is made of metal material, specifically, tooth groove piece 200 is made of cast aluminum, cast aluminum has higher mechanical strength, meets the mechanical performance requirement of pulley, tooth groove piece 200 can also be made of steel material, tooth groove piece 200 made of steel material has higher strength and load capacity, and is suitable for bearing larger torque.
[0032] Exemplarily, the pulley main part 100 forms a second step 150 at the connection of the fourth tooth part 170 and the fifth tooth part 180, the second step 150 abuts against the first step 260, the second step 150 and the first step 260 cooperate to limit the tooth groove piece 200, preventing it from shifting in the axial direction and preventing it from coming off.
[0033] Exemplary, the pulley body 100 is formed with a limiting ring 300 on the outside of the thick end 240, which can abut the end face of the thick end 240, the center of the limiting ring 300 is provided with a limiting hole 310, the inner diameter of the limiting ring 300 is smaller than the diameter of the thick end 240, that is, the diameter of the limiting hole 310 is smaller than the diameter of the thick end 240, and the diameter of the limiting hole 310 is smaller than the diameter of the thick end 240, so that the limiting ring 300 blocks the outer surface of the thick end 240, thereby limiting the axial direction of the tooth groove piece 200, so that the tooth groove piece 200 cannot fall off from the side of the limiting hole 310, and the limiting hole 310 allows the shaft to pass through the limiting hole 310 and be inserted into the center of the tooth groove piece 200, so that the shaft is engaged with the first tooth part 210, and the limiting hole 310 is provided on the limiting ring 300, which does not block the installation of the shaft and also limits the tooth groove piece 200.
[0034] Exemplary, the limiting ring 300 and the second step 150 form a limiting cavity 190 for limiting the thick end 240, which limits and positions the thick end 240 of the tooth groove piece 200, the limiting ring 300 abuts the outer surface of the thick end 240, and the second step 150 abuts the first step 260, which limits and positions the thick end 240 and ensures that it cannot move axially.
[0035] Exemplary, the part of the pulley body 100 surrounding the thin end 250 is a convex cylinder 160, the end face of the cylinder 160 is flush with the end face of the thin end 250, and the outer surface of the cylinder 160 is flush with the outer surface of the thin end 250, and the cylinder 160 is provided to form a fifth tooth part 180 on the inner side of the cylinder 160, which is engaged with the third tooth part 230 of the thin end 250, thereby increasing the engagement contact area with the tooth groove piece 200 and ensuring the transmission effect, and the cylinder 160 is provided to make the hub part of the pulley body 100 not as thick as the tooth groove piece 200, so that the engagement contact with the entire outer side of the tooth groove piece 200 can be achieved, thereby reducing material usage, reducing the weight of the pulley, and reducing manufacturing costs.
[0036] Exemplary, the pulley body 100 is provided with a spoke 110, which is an arc-shaped structure bent to one side, and the spoke 110 is bent outward to form an arc-shaped structure. Due to the assembly relationship between the pulley and the barrel, the inner barrel protrudes outward along the axial direction, and the center of the pulley also protrudes outward compared to its outer ring. The belt is installed on the outer ring of the pulley body 100, and it is inward relative to the center of the pulley. Therefore, the belt exerts a continuous inward force on the outer ring of the pulley along the axial direction, and the curvature of the spoke 110 can be used to resist the deformation of the pulley under stress. Moreover, the outer ring of the pulley is also subjected to a central pulling force from the belt, and the curvature also has a certain resistance to it.
[0037] Exemplarily, the connection between the spoke 110 and the outer ring of the pulley body 100 is provided with a fillet 120, and the connection between the spoke 110 and the outer ring of the pulley body 100 is transitioned by the fillet 120, so that the tangential force applied to the outer ring during the start of the driving end and the braking does not cause a large impact force on the connection of the spoke 110, thereby preventing the spoke 110 from being broken.
[0038] Exemplarily, a plurality of key grooves 140 are arranged on the pulley body 100, and the key grooves 140 are used to install keys to prevent the pulley from sliding on the shaft.
[0039] Exemplarily, a plurality of through holes 130 are arranged on the pulley body 100, and the through holes 130 are arranged to reduce the weight of the pulley as a whole and save driving energy.
[0040] Compared with the prior art, the pulley structure provided by the utility model has the beneficial effects that:
[0041] The tooth groove piece 200 is a hollow columnar structure, the inner side of the center is provided with a first tooth part 210 for connecting with the rotating shaft, so that the pulley can be fixed on the shaft, the diameter of the thick end 240 on the outer side of the tooth groove piece 200 is greater than the diameter of the thin end 250, so that the connection between the thick end 240 and the thin end 250 forms a first step 260, the first step 260 plays a limiting role and axially limits the tooth groove piece 200, so that the tooth groove piece 200 is prevented from being offset in the axial direction, the second tooth part 220 and the third tooth part 230 are arranged on the thick end 240 and the thin end 250 respectively, so that when the pulley body 100 is cast, the fourth tooth part 170 engaged with the second tooth part 220 and the fifth tooth part 180 engaged with the third tooth part 230 are formed, the entire outer side surface of the tooth groove piece 200 is ensured to be engaged and connected with the pulley body 100, the contact area between the tooth groove piece 200 and the pulley body 100 is increased, slipping is avoided, the pulley body 100 is made of BMC material, so that the weight of the pulley is reduced, the light weight is realized, and the manufacturing cost is reduced, the tooth groove piece 200 required to be connected with the rotating shaft is made of metal material, so that the mechanical strength requirement of the pulley is met, the tooth groove piece 200 made of metal material is not easy to wear and slip, the overall rigidity is high, and the tooth groove piece 200 is not easy to be deformed under pressure, the pulley body 100 is cast and formed on the outer periphery of the tooth groove piece 200, so that the pulley body 100 and the tooth groove piece 200 are integrated, the overall strength is high, the mechanical strength requirement of the tooth groove piece 200 at the center is ensured, and the effects of reducing the weight and reducing the manufacturing cost are achieved.
[0042] The preferred embodiments of the utility model are described above, and it should be noted that those skilled in the art can make some improvements and replacements without departing from the technical principles of the utility model, and these improvements and replacements should also be regarded as the protection scope of the utility model.
Claims
1. A pulley structure, characterized in that, The device includes a toothed component and a pulley body. The toothed component is a hollow cylindrical structure. A first tooth is provided on the inner side of the toothed component. The outer side of the toothed component includes a thick end and a thin end. The diameter of the thick end is larger than the diameter of the thin end, forming a first step at the connection between the thick end and the thin end. A second tooth is provided on the thick end, and a third tooth is provided on the thin end. The toothed component is made of metal. The pulley body is cast from BMC material on the outer periphery of the toothed component, forming a fourth tooth that meshes with the second tooth and a fifth tooth that meshes with the third tooth. A second step is formed at the connection between the fourth tooth and the fifth tooth in the pulley body.
2. The pulley structure according to claim 1, characterized in that, The pulley body has a limiting ring formed on the outer side of the thick end, which abuts against the end face of the thick end.
3. The pulley structure according to claim 2, characterized in that, The inner diameter of the limiting ring is smaller than the diameter of the thicker end.
4. The pulley structure according to any one of claims 1 to 3, characterized in that, The portion of the pulley body surrounding the narrow end is a protruding cylinder, and the end face of the cylinder is flush with the end face of the narrow end.
5. The pulley structure according to any one of claims 1 to 3, characterized in that, The pulley body is provided with spokes, and the spokes are arc-shaped structures that bend to one side.
6. The pulley structure according to claim 5, characterized in that, The connection between the wheel spokes and the outer ring of the pulley body is provided with rounded corners.
7. The pulley structure according to any one of claims 1 to 3, characterized in that, The pulley body is provided with several keyways.