A drum washing machine inner drum tripod and a drum washing machine

Abstract

The utility model discloses a drum washing machine inner tube tripod and drum washing machine, wherein, drum washing machine inner tube tripod includes at least three support arms, and the first end fixed connection or integral of each support arm, and the second end integral forming inner tube connecting arm of each support arm, the inner tube connecting arm is the bending flanging of the second end place of support arm, and the welding nut is fixed with on the inner tube connecting arm. The utility model provides drum washing machine inner tube tripod, and the design of the inner tube connecting arm of support arm end integral forming is replaced traditional welding type independent connecting piece, and the overall optimization of structural strength, production efficiency, product performance and cost control is successfully realized. It not only solves the inherent reliability hidden danger of traditional structure, and more brings the significant technical effect that vibration noise is lower, service life is longer, quality is better, is an improvement with innovativeness and practicality.

Description

Technical Field

[0001] This utility model relates to the field of washing machine accessories technology, specifically to a tripod for the inner drum of a drum washing machine and a drum washing machine. Background Technology

[0002] As a commonly used washing appliance in modern households, the inner drum structure of a drum washing machine has a significant impact on the overall machine's operational stability, vibration noise, and service life. The inner drum is usually fixed and driven to rotate by a tripod structure. As a key component connecting the inner drum and the drive shaft, the tripod must possess good strength, rigidity, and fatigue resistance.

[0003] Currently, most common drum washing machine inner drum tripods are manufactured using casting or stamping processes. They typically consist of three or more support arms arranged radially, with one end connected to the central hub and the other end connected to the inner drum. The inner drum connection of traditional tripods is usually secured with bolts, requiring welded connectors at the ends of the support arms. These connectors have mounting holes, and the bolts are used to assemble them with the inner drum. This method has the following drawbacks:

[0004] (1) Structural strength and reliability issues.

[0005] Severe stress concentration: Independent connectors are typically attached to the end of the support arm via a weld. This welded area becomes the weak point of the entire structure. Under the complex alternating stress generated by the high-speed spin cycle of a washing machine (especially when clothes are unevenly distributed), stress will be highly concentrated in the weld and its heat-affected zone. This can easily lead to fatigue cracking of the weld, eventually causing the connector to detach, resulting in imbalance or even damage to the entire inner drum.

[0006] (2) Complexity of production process and cost issues.

[0007] The large number of parts and high cost: The need to separately produce, manage and store the two additional parts, "connectors" and "bolts", increases material and management costs.

[0008] Positioning and welding: The connectors need to be precisely positioned and welded to the end of each support arm. This step requires high precision in the fixtures and welding processes, is time-consuming, and increases energy costs.

[0009] Yield and quality risks: Welding and machining are both critical process control points. Any error in any step (such as incomplete welding, missing welding, hole position deviation, welding deformation) may lead to product scrap and affect the production yield.

[0010] In view of the above, this utility model patent is hereby proposed. Utility Model Content

[0011] To address the aforementioned issues, this utility model aims to provide a tripod for the inner drum of a drum washing machine and a drum washing machine, which simplifies the manufacturing process of the tripod and reduces its cost while meeting the rigidity requirements of the tripod.

[0012] Specifically, the following technical solution was adopted:

[0013] A tripod for the inner drum of a drum washing machine includes at least three support arms. The first end of each support arm is fixedly connected or integrally formed, and the second end of each support arm is integrally formed to form an inner drum connecting arm. The inner drum connecting arm is a bent flange formed at the second end of the support arm. A welding nut is welded and fixed on the inner drum connecting arm.

[0014] As an optional embodiment of this utility model, a drum washing machine inner drum tripod of this utility model includes a connecting bushing with a hollow channel inside.

[0015] Each of the support arms is individually formed by sheet metal processing. The support arm has a support arm groove formed inside. The support arm groove is open at the first end and closed at the second end to form the inner cylinder connecting arm.

[0016] The first end of each of the support arms is pre-positioned and welded to the outer peripheral wall of the connecting bushing to form an integral structure, and the support arms are evenly distributed along the outer periphery of the connecting bushing.

[0017] As an optional embodiment of this utility model, the support arm has a horizontal arm segment and a first vertical arm segment and a second vertical arm segment located at both ends of the horizontal arm segment, the horizontal arm segment, the first vertical arm segment and the second vertical arm segment enclose to form the support arm groove, and the inner cylinder connecting arm is integrally formed with the second ends of the horizontal arm segment, the first vertical arm segment and the second vertical arm segment by sheet metal.

[0018] The first ends of the horizontal arm segment, the first vertical arm segment, and the second vertical arm segment are welded to the outer peripheral wall of the connecting bushing to form an integral structure.

[0019] As an optional embodiment of this utility model, the end of the first vertical arm segment away from the horizontal arm segment and the end of the second vertical arm segment away from the horizontal arm segment are both turned outward to form a horizontal flange. The end of the horizontal flange is folded to form a vertical flange. The first end of the horizontal flange is inclined so that the end of the vertical flange does not protrude from the ends of the first vertical arm segment and the second vertical arm segment.

[0020] The horizontal flanges of two adjacent support arms are spliced ​​together and fixed by welding, and the vertical flanges of two adjacent support arms are spliced ​​together and fixed by welding.

[0021] As an optional embodiment of this utility model, the second end of the horizontal flange and the second end of the vertical flange are flush with the second end of the horizontal arm segment.

[0022] As an optional embodiment of this utility model, the height of the second end of the vertical flange is lower than the height of the inner cylinder connecting arm.

[0023] As an optional embodiment of this utility model, a drum washing machine inner drum tripod of this utility model includes an inner drum shaft, the connecting bushing having a first end and a second end opposite to each other, and one end of the inner drum shaft being inserted into and fixedly assembled by the first end of the connecting bushing.

[0024] The second end of the connecting bushing has an installation step, one end of the horizontal arm segment is disposed on the installation step and is welded and fixed to the outer peripheral wall of the second end, and one end of the first vertical arm segment and one end of the second vertical arm segment are respectively welded and fixed to the outer peripheral wall of the connecting bushing.

[0025] As an optional embodiment of this utility model, an installation hole is provided on the inner cylinder connecting arm, and the welding nut is positioned with the installation hole and welded together.

[0026] As an optional embodiment of this utility model, the outer peripheral wall of the mounting hole protrudes into the groove of the support arm.

[0027] This utility model also provides a drum washing machine with the aforementioned drum washing machine inner drum tripod, including an inner drum, wherein the inner drum connecting arm of the support arm is fixedly connected to the bottom of the inner drum.

[0028] This utility model discloses a tripod for the inner drum of a drum washing machine. By designing the inner drum connecting arm as a bent and flanged end integrally formed on the second end of the support arm, and welding nuts are welded and fixed on it, a fundamental structural innovation is achieved, bringing significant technological progress and beneficial effects.

[0029] (1) Significantly improves structural strength and reliability.

[0030] Eliminating stress concentration points: Traditional welding of independent connecting parts results in severe stress concentration at the weld seam. This invention integrates the inner cylinder connecting arm and support arm into a single, continuous, and complete mechanical structure, ensuring smooth force transmission and fundamentally eliminating the risk of weld fatigue cracking. This significantly improves the structural reliability and service life of the tripod under high-speed, high-load conditions.

[0031] High connection rigidity: The rigidity of the one-piece molded inner cylinder connecting arm structure is much higher than that of traditional thin plate welded parts. It is not easy to deform under bolt preload and working load, ensuring the stability of the connection interface and reducing the possibility of abnormal noise or failure due to loosening.

[0032] (2) Optimize production processes to improve production efficiency and consistency.

[0033] Simplified manufacturing process: Eliminates multiple processes such as stamping, warehousing, management, and welding positioning of independent connecting parts. The inner cylinder connecting arm can be completed in one step through the stamping process of the support arm, which greatly shortens the process flow and reduces production energy consumption and equipment occupation.

[0034] Improved product consistency and yield: Avoids product accuracy issues caused by welding deformation and secondary positioning errors. The one-piece molding structure has extremely high stability, with the position and angle of each inner cylinder connecting arm 201 remaining consistent, ensuring the dynamic balance performance of the product and significantly improving the production yield.

[0035] Facilitates automated production: The simplified structure is well-suited for automated, high-volume manufacturing on modern stamping production lines, improving production efficiency.

[0036] (3) Excellent dynamic balance and low vibration and low noise performance.

[0037] Uniform mass distribution: The one-piece molded structure avoids the mass asymmetry caused by post-welded parts. The mass distribution of the entire tripod is more uniform, improving dynamic balance performance from the source.

[0038] Reduced vibration sources: By eliminating potential problems such as welding deformation and loose connections, the tripod itself has excellent inherent balance. This translates into less vibration and lower operating noise during high-speed spin-drying in the washing machine, enhancing the overall quality of the machine and user comfort.

[0039] (4) Reduce costs and save space.

[0040] Reduced number of parts: Eliminating separate connectors and corresponding fastening bolts (if required) reduces the cost of material procurement, warehousing and management.

[0041] Material saving: Bending and flanging structures are generally more material-efficient than independent connectors that require strength, which helps to achieve lightweighting and reduce manufacturing costs.

[0042] (5) Enhance corrosion resistance.

[0043] Reduced corrosion risks: Traditional weld areas and gaps between connectors and support arms are prone to electrochemical corrosion. This solution eliminates the potential problems of contact between these gaps and dissimilar materials (such as solder), improving the overall corrosion resistance of the tripod.

[0044] In summary, the drum washing machine inner drum tripod provided by this utility model, by integrally forming the inner drum connecting arm at the end of the support arm to replace the traditional welded independent connecting parts, successfully achieves comprehensive optimization of structural strength, production efficiency, product performance, and cost control. It not only solves the inherent reliability issues of traditional structures but also brings significant technical benefits such as lower vibration and noise, longer service life, and superior quality, making it an improvement that combines innovation and practicality. Attached image description:

[0045] Figure 1 This utility model provides a three-dimensional structural diagram of a tripod for the inner drum of a drum washing machine. Figure 1 ;

[0046] Figure 2 This utility model provides a three-dimensional structural diagram of a tripod for the inner drum of a drum washing machine. Figure 2 ;

[0047] Figure 3 An exploded view of a tripod for the inner drum of a drum washing machine according to an embodiment of this utility model;

[0048] Figure 4 This utility model provides a three-dimensional structural diagram of the support arm of a tripod for the inner drum of a drum washing machine. Figure 1 ;

[0049] Figure 5 This utility model provides a three-dimensional structural diagram of the support arm of a tripod for the inner drum of a drum washing machine. Figure 2 . Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0051] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0052] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0053] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0054] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] See Figures 1-5 As shown, a drum washing machine inner drum tripod in this embodiment includes at least three support arms 200. The first end of each support arm 200 is fixedly connected or integrally formed, and the second end of each support arm 200 is integrally formed to form an inner drum connecting arm 201. The inner drum connecting arm 201 is a bent flange formed at the second end of the support arm 200. A welding nut 500 is welded and fixed on the inner drum connecting arm 201.

[0056] This embodiment of a drum washing machine inner drum tripod achieves a fundamental structural innovation by designing the inner drum connecting arm 201 as a bent flange integrally formed at the second end of the support arm 200, and welding a welding nut 500 to it. This results in significant technological progress and beneficial effects.

[0057] (1) Significantly improves structural strength and reliability.

[0058] Eliminating stress concentration points: Traditional welding of independent connecting parts results in severe stress concentration at the weld. In this embodiment, the inner cylinder connecting arm 201 and the support arm 200 are integrally formed, creating a continuous and complete mechanical structure. This ensures smooth force transmission, fundamentally eliminating the risk of weld fatigue cracking and significantly improving the structural reliability and service life of the tripod under high-speed and high-load conditions.

[0059] High connection rigidity: The one-piece molded inner cylinder connecting arm 201 has a structural rigidity that is much higher than that of traditional thin plate welded parts. It is not easy to deform under bolt preload and working load, ensuring the stability of the connection interface and reducing the possibility of abnormal noise or failure due to loosening.

[0060] (2) Optimize production processes to improve production efficiency and consistency.

[0061] Simplified manufacturing process: Eliminates multiple processes such as stamping, storage, management, and welding positioning of independent connecting parts. The inner cylinder connecting arm 201 can be completed in one step through the stamping process of the support arm 200, which greatly shortens the process flow and reduces production energy consumption and equipment occupation.

[0062] Improved product consistency and yield: Avoids product accuracy issues caused by welding deformation and secondary positioning errors. The one-piece molding structure has extremely high stability, with the position and angle of each inner cylinder connecting arm 201 remaining consistent, ensuring the dynamic balance performance of the product and significantly improving the production yield.

[0063] Facilitates automated production: The simplified structure is well-suited for automated, high-volume manufacturing on modern stamping production lines, improving production efficiency.

[0064] (3) Excellent dynamic balance and low vibration and low noise performance.

[0065] Uniform mass distribution: The one-piece molded structure avoids the mass asymmetry caused by post-welded parts. The mass distribution of the entire tripod is more uniform, improving dynamic balance performance from the source.

[0066] Reduced vibration sources: By eliminating potential problems such as welding deformation and loose connections, the tripod itself has excellent inherent balance. This translates into less vibration and lower operating noise during high-speed spin-drying in the washing machine, enhancing the overall quality of the machine and user comfort.

[0067] (4) Reduce costs and save space.

[0068] Reduced number of parts: Eliminating separate connectors and corresponding fastening bolts (if required) reduces the cost of material procurement, warehousing and management.

[0069] Material saving: Bending and flanging structures are generally more material-efficient than independent connectors that require strength, which helps to achieve lightweighting and reduce manufacturing costs.

[0070] (5) Enhance corrosion resistance.

[0071] Reduced corrosion risks: Traditional weld areas and gaps between connectors and support arms are prone to electrochemical corrosion. This solution eliminates the potential problems of contact between these gaps and dissimilar materials (such as solder), improving the overall corrosion resistance of the tripod.

[0072] In summary, the drum washing machine inner drum tripod provided in this embodiment, by integrally forming the inner drum connecting arm 201 at the end of the support arm, replaces the traditional welded independent connecting parts design, successfully achieving comprehensive optimization of structural strength, production efficiency, product performance, and cost control. It not only solves the inherent reliability issues of traditional structures but also brings significant technical benefits such as lower vibration and noise, longer service life, and superior quality, making it an innovative and practical improvement.

[0073] As an optional implementation of this embodiment, a drum washing machine inner drum tripod includes a connecting bushing 400 with a hollow channel inside; each of the support arms 200 is individually formed by sheet metal processing, and a support arm groove is formed inside the support arm 200. The support arm groove is open at the first end and closed at the second end to form the inner drum connecting arm 201; the first end of each support arm 200 is pre-positioned and welded to the outer peripheral wall of the connecting bushing 400 to form an integral structure, and each support arm 200 is evenly distributed along the outer periphery of the connecting bushing 400.

[0074] This embodiment provides a tripod for the inner drum of a drum washing machine. The connecting bushing 400 and each support arm 200 can be individually machined and formed. All three support arms 200, once machined, are welded and fixed integrally with the connecting bushing 400, resulting in the following technical advantages:

[0075] First, the connecting bushing 400 and the support arm 200 are processed separately. Compared with the existing one-piece die casting method, the requirements for processing equipment are lower and the processing method is simpler and more flexible.

[0076] Secondly, each support arm 200 is pre-positioned and welded to the outer peripheral wall of the connecting bushing 400 to form an integral structure, thereby improving the positioning effect.

[0077] Furthermore, the finished connecting bushing 400 and support arm 200 are fixedly connected as an integral structure by welding. Compared with the existing integral die-casting method, the process is simple and reliable, and meets the overall rigidity requirements of the inner drum tripod of the drum washing machine.

[0078] Finally, the above methods reduce the overall cost of the drum washing machine's inner drum tripod in this embodiment. Even if corrosion and breakage occur during long-term use, requiring replacement, the user's maintenance and replacement costs will be reduced. Furthermore, if the connecting bushing 400 or support arm 200 can be replaced separately, the user's maintenance and replacement costs will be further reduced.

[0079] In summary, the drum washing machine inner drum tripod of this embodiment reduces manufacturing costs and can simultaneously meet the rigidity requirements of the tripod as a whole, thus possessing broad market value.

[0080] In addition, the inner cylinder connecting arm 201 in this embodiment is formed while the support arm 200 is manufactured separately.

[0081] Furthermore, in this embodiment, the support arm 200 has a horizontal arm segment 203 and a first vertical arm segment 206 and a second vertical arm segment 207 located at both ends of the horizontal arm segment 203, respectively. The horizontal arm segment 203, the first vertical arm segment 206, and the second vertical arm segment 207 enclose and form the support arm groove. The inner cylinder connecting arm 201 is integrally formed with the second ends of the horizontal arm segment 203, the first vertical arm segment 206, and the second vertical arm segment 207 by sheet metal. The first ends of the horizontal arm segment 203, the first vertical arm segment 206, and the second vertical arm segment 207 are respectively welded to the outer peripheral wall of the connecting bushing 100 to form an integral structure.

[0082] In this embodiment, the ends of the first vertical arm segment 206 away from the horizontal arm segment 203 and the ends of the second vertical arm segment 207 away from the horizontal arm segment 203 are both turned outward to form horizontal flanges 204. The ends of the horizontal flanges 204 are folded to form vertical flanges 205. The first end of the horizontal flanges 204 is inclined so that the end of the vertical flanges 205 does not protrude from the ends of the first vertical arm segment 206 and the second vertical arm segment 207. The horizontal flanges 204 of two adjacent support arms 200 are spliced ​​together and fixed by welding, and the vertical flanges 205 of two adjacent support arms 200 are spliced ​​together and fixed by welding.

[0083] In this embodiment, the second end of the horizontal flange 204, the second end of the vertical flange 205, and the second end of the horizontal arm segment 203 are flush.

[0084] In this embodiment, the height of the second end of the vertical flange 205 is lower than the height of the inner cylinder connecting arm 201.

[0085] As an optional implementation of this embodiment, a drum washing machine inner drum tripod includes an inner drum shaft 100. The connecting bushing 400 has a first end and a second end opposite to each other. One end of the inner drum shaft 100 is inserted into and fixedly assembled by the first end of the connecting bushing 400. The second end of the connecting bushing 400 has an installation step. One end of the horizontal arm segment 203 is disposed on the installation step and welded to the outer peripheral wall of the second end. One end of the first vertical arm segment 206 and one end of the second vertical arm segment 207 are respectively welded to the outer peripheral wall of the connecting bushing 400.

[0086] In this embodiment, a sealing cap 300 is installed on the second end of the connecting bushing 400 to seal the inner cylinder shaft 100.

[0087] In order to achieve the fixed assembly of the inner drum connecting arm 201 and the inner drum of the washing machine, the inner drum connecting arm 201 described in this embodiment is provided with a mounting hole 202, and the welding nut 500 is positioned and welded to the mounting hole 202 as a whole.

[0088] Furthermore, in this embodiment, the outer peripheral wall of the mounting hole 202 protrudes into the groove of the support arm.

[0089] This embodiment also provides a drum washing machine with the aforementioned drum washing machine inner drum tripod, including an inner drum, wherein the inner drum connecting arm 201 of the support arm 200 is fixedly connected to the bottom of the inner drum.

[0090] The drum washing machine in this embodiment uses the drum washing machine inner drum tripod to meet the transmission rigidity requirements of the connection between the drive motor and the inner drum, while reducing the overall machine cost and subsequent use and maintenance costs.

[0091] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A tripod for the inner drum of a drum washing machine, characterized in that, It includes at least three support arms, the first end of each support arm is fixedly connected or integrally formed, the second end of each support arm is integrally formed to form an inner cylinder connecting arm, the inner cylinder connecting arm is a bent flange formed at the second end of the support arm; a welding nut is welded and fixed on the inner cylinder connecting arm.

2. A tripod for the inner drum of a drum washing machine according to claim 1, characterized in that, Includes a connecting bushing with a hollow internal channel; Each of the support arms is individually formed by sheet metal processing. The support arm has a support arm groove formed inside. The support arm groove is open at the first end and closed at the second end to form the inner cylinder connecting arm. The first end of each of the support arms is pre-positioned and welded to the outer peripheral wall of the connecting bushing to form an integral structure, and the support arms are evenly distributed along the outer periphery of the connecting bushing.

3. A tripod for the inner drum of a drum washing machine according to claim 2, characterized in that, The support arm has a horizontal arm segment and a first vertical arm segment and a second vertical arm segment located at both ends of the horizontal arm segment. The horizontal arm segment, the first vertical arm segment, and the second vertical arm segment enclose and form the support arm groove. The inner cylinder connecting arm is integrally formed from sheet metal with the second ends of the horizontal arm segment, the first vertical arm segment, and the second vertical arm segment. The first ends of the horizontal arm segment, the first vertical arm segment, and the second vertical arm segment are welded to the outer peripheral wall of the connecting bushing to form an integral structure.

4. A tripod for the inner drum of a drum washing machine according to claim 3, characterized in that, The ends of the first vertical arm segment away from the horizontal arm segment and the ends of the second vertical arm segment away from the horizontal arm segment are both turned outward to form horizontal flanges. The ends of the horizontal flanges are folded to form vertical flanges. The first end of the horizontal flange is inclined so that the end of the vertical flange does not protrude from the ends of the first and second vertical arm segments. The horizontal flanges of two adjacent support arms are spliced ​​together and fixed by welding, and the vertical flanges of two adjacent support arms are spliced ​​together and fixed by welding.

5. A tripod for the inner drum of a drum washing machine according to claim 4, characterized in that, The second end of the horizontal flange and the second end of the vertical flange are flush with the second end of the horizontal arm segment.

6. A tripod for the inner drum of a drum washing machine according to claim 4, characterized in that, The height of the second end of the vertical flange is lower than the height of the inner cylinder connecting arm.

7. A tripod for the inner drum of a drum washing machine according to claim 4, characterized in that, Includes an inner cylinder shaft, the connecting bushing having a first end and a second end opposite to each other, one end of the inner cylinder shaft being inserted into and fixedly assembled by the first end of the connecting bushing; The second end of the connecting bushing has an installation step, one end of the horizontal arm segment is disposed on the installation step and is welded and fixed to the outer peripheral wall of the second end, and one end of the first vertical arm segment and one end of the second vertical arm segment are respectively welded and fixed to the outer peripheral wall of the connecting bushing.

8. A tripod for the inner drum of a drum washing machine according to claim 2, characterized in that, The inner cylinder connecting arm has an installation hole, and the welding nut is positioned in the installation hole and welded together.

9. A tripod for the inner drum of a drum washing machine according to claim 8, characterized in that, The outer peripheral wall of the mounting hole protrudes into the groove of the support arm.

10. A drum washing machine having a tripod for the inner drum as described in any one of claims 1-9, characterized in that, It includes an inner cylinder, and the inner cylinder connecting arm of the support arm is fixedly connected to the bottom of the inner cylinder.

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