A casing anti-disassembly structure and a drainage motor comprising the same

Abstract

The utility model discloses a kind of machine shell anti-disassembly structure and drain motor comprising it, including upper shell, lower shell and the male buckle being set at the outer periphery of upper shell and the female buckle being set at the outer periphery of lower shell, the female buckle and lower shell form the through hole for male buckle to pass between, the end of female buckle is equipped with a push piece, when the male buckle is installed, it is deformed by abutting push piece, so that male buckle is over through hole and is clamped on push piece, the horizontal distance that male buckle is moved from buckling state to abutting state with lower shell is L1, the horizontal length of the buckling surface of male buckle and push piece is L2, then L1L2. The machine shell anti-disassembly structure of the utility model can be firmly locked motor while ensuring easy installation without causing additional costs, and is not easy to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of drainage motor design technology, and in particular to a housing anti-disassembly structure and a drainage motor containing the same. Background Technology

[0002] As a key control component of the washing machine's drainage system, the quality of the drain motor is paramount. Customers are particularly concerned about the quality of drain motors: for motors returned from the market, it is often necessary to analyze the causes of failure one by one and provide improvement measures to address the relevant failure modes. Currently, some after-sales personnel disassemble motors without authorization, leading to malfunctions. Because there are no obvious anti-tamper labels or markings, unclear liability can easily arise during the final determination of responsibility. To avoid this situation, improving the anti-tamper performance of the drain motor is an urgent technical problem to be solved.

[0003] In existing technologies, the housings of most drainage motors are fastened using a snap-fit ​​structure. There are generally two types of fastening methods. One is as disclosed in patent number CN215186316U, where the male snap hooks onto the slot from the outside. This design is easy to disassemble; simply pry the male snap away from the slot to easily remove it, allowing for non-destructive disassembly. The other is as disclosed in patent number CN211340095U, where a one-way snap is inserted from the inside and fastened to the connecting hole. However, this patent does not address the issue of preventing disassembly, nor does it limit the size of the inner space of the connecting hole. Typically, to ensure the one-way snap can be inserted from the inside, the inner space of the connecting hole must be larger than the size of the one-way snap. In this case, after-sales personnel can still easily remove it by pressing the one-way snap.

[0004] Therefore, it is necessary to design a housing anti-disassembly structure that can increase the disassembly difficulty of the drainage motor housing and reduce the disassembly rate of after-sales personnel, as well as a drainage motor containing the structure. Utility Model Content

[0005] To address the technical problem in existing drainage motors where the housing can be easily disassembled, leading to unauthorized disassembly by after-sales personnel and resulting in motor malfunction and unclear liability, this utility model provides a housing anti-disassembly structure and a drainage motor containing the structure to solve the above problems.

[0006] This utility model proposes a casing anti-disassembly structure, including an upper casing, a lower casing, a male buckle disposed on the outer periphery of the upper casing, and a female buckle disposed on the outer periphery of the lower casing. A through hole is formed between the female buckle and the lower casing for the male buckle to pass through. A lever is provided at the end of the female buckle. When the male buckle is installed, it abuts against the lever to deform it, so that the male buckle passes through the through hole and is locked on the lever. The horizontal distance that the male buckle moves from the locked state to the state of abutting against the lower casing is L1, and the horizontal length of the locking surface between the male buckle and the lever is L2. To ensure self-locking, L1 < L2 must be ensured.

[0007] In an optional embodiment of this utility model, the female buckle has an outer plate that is parallel to and opposite to the outer side of the lower housing, and the outer plate has two grooves at the end away from the upper housing, with the paddle located between the two grooves. In an optional embodiment of this utility model, the inner surface of the paddle is a sloping surface inclined towards the lower housing, and the minimum distance H1 between the sloping surface and the lower housing is less than the minimum distance H2 between the outer plate and the lower housing.

[0008] In an optional embodiment of this utility model, the lower housing surface is provided with a limiting boss located in front of the female buckle along the insertion direction of the male buckle. The surface of the limiting boss facing the through hole is a first guide slope, and the male buckle is engaged with the female buckle under the guidance of the first guide slope.

[0009] In an optional embodiment of this utility model, when the male buckle abuts against the limiting boss during insertion, the male buckle contacts the paddle.

[0010] In an optional embodiment of this utility model, the depth of the groove is L4. When the male buckle is inserted and contacts the limiting boss, the maximum distance from the contact part of the male buckle and the female buckle to the end of the lever is L3, then L3 < L4.

[0011] In an optional embodiment of this utility model, the width of the male buckle is less than or equal to the maximum distance between the two grooves.

[0012] In an optional embodiment of this utility model, the difference between the width of the paddle and the width of the male buckle is 1mm to 2mm.

[0013] In an optional embodiment of this utility model, the male buckle includes a connecting plate adapted to be inserted into a through hole and a hook portion located at one end of the connecting plate. The other end of the connecting plate is connected to the upper housing. The surface of the hook portion has a second guide slope. When the male buckle is about to enter the through hole, the second guide slope impacts the end of the female buckle, causing the connecting plate to deform.

[0014] This utility model also proposes a drainage motor, including a synchronous motor, a gear set, and the aforementioned anti-disassembly structure of the housing. The gear set is connected to the output shaft of the synchronous motor, and the upper and lower housings of the anti-disassembly structure of the housing form a cavity to accommodate the synchronous motor and the gear set.

[0015] The beneficial effects of this utility model are: (1) The anti-disassembly structure of the housing described in this utility model ensures easy installation without incurring additional costs, and can firmly lock the motor, making it difficult to disassemble.

[0016] (2) This utility model reduces the size of the through hole on the inner side of the lever by setting the inner slope surface of the lever, so that the male buckle cannot be pushed back and removed. At the same time, the elastic deformation of the lever allows the male buckle to be successfully assembled with the female buckle.

[0017] (3) The present invention can both push the male buckle and the female buckle to engage by setting the limiting boss, and prevent the male buckle from disengaging from the female buckle, thereby achieving the anti-disassembly effect. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure corresponding to Embodiment 1 of the anti-disassembly structure of the casing described in this utility model; Figure 2 yes Figure 1 The diagram shows the female buckle in the anti-disassembly structure of the housing; Figure 3 yes Figure 1 The diagram shows the male thread in the anti-disassembly structure of the housing; Figure 4 yes Figure 1 The diagram shows the state of the anti-disassembly structure of the housing during the fastening process, with the male buckle preparing to enter the through hole. Figure 5 yes Figure 1 The diagram shows the state of the anti-disassembly structure of the housing when the tips of the male and female buckles are tangent during the fastening process. Figure 6 yes Figure 1 The diagram shows the snap-fit ​​state of the anti-disassembly structure of the housing. Figure 7 yes Figure 1 The diagram shows the anti-disassembly structure of the housing when the male buckle is pressed into contact with the surface of the lower housing. Figure 8 This is a schematic diagram of the structure corresponding to Embodiment 2 of the anti-disassembly structure of the casing described in this utility model; Figure 9 yes Figure 8 The diagram shows the snap-fit ​​state of the anti-disassembly structure of the housing. Figure 10 yes Figure 8 The diagram shows the state of the anti-disassembly structure of the housing during the fastening process, specifically when the male thread is about to enter the through hole. Figure 11 yes Figure 8 The diagram shows the state of the male buckle inside the through hole during the fastening process of the anti-disassembly structure of the housing. Figure 12 yes Figure 8 The diagram shows the state of the anti-disassembly structure of the housing when the male buckle abuts against the limiting boss during the fastening process. Figure 13 This is an exploded view of a specific embodiment of the drainage motor described in this utility model.

[0020] In the figure, 1. Upper shell, 2. Lower shell, 201. Limiting boss, 3. Male buckle, 301. Hook, 302. Connecting plate, 4. Female buckle, 401. Paddle, 402. Outer plate, 5. Through hole, 6. Groove, 7. Sloping surface, 8. Second guide slope, 9. First guide slope, 10. Synchronous motor, 11. Gear set, 12. Stop mating surface. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] A tamper-proof casing structure includes an upper casing 1, a lower casing 2, a male buckle 3 disposed on the outer periphery of the upper casing 1, and a female buckle 4 disposed on the outer periphery of the lower casing 2. A through hole 5 is formed between the female buckle 4 and the lower casing 2 for the male buckle 3 to pass through. The male buckle 3 typically has a hook portion 301. During installation, the male buckle 3 passes through the through hole 5 and the hook portion 301 hooks onto the end of the female buckle 4, achieving a fastening between the two. The end of the female buckle 4 is provided with a lever 401. When the male buckle 3 is installed, it abuts against the lever 401 to deform it, thereby allowing the male buckle 3 to pass through the through hole 5 and be engaged with the lever 401. In other words, the reduction in the movement space when the male buckle 3 reaches the position of the lever 401 causes the male buckle 3 to deform by abutting against the lever 401.

[0023] Let L1 be the horizontal distance that male buckle 3 moves from the engaged state to the state of contact with the lower housing 2, and let L2 be the horizontal length of the engagement surface between male buckle 3 and the lever 401. Then L1 < L2. The engaged state of male buckle 3 refers to... Figure 6 The state shown, where the male buckle 3 abuts against the lower housing 2, refers to the state where the hook portion 301 of the male buckle 3 is manually pressed and bent to its limit position towards the lower housing 2. Figure 7 As shown, by limiting L1 < L2, the male buckle 3 cannot detach from the paddle 401 if the paddle 401 is not deformed.

[0024] like Figure 4As shown, the male buckle 3 enters the through hole 5 from bottom to top. Since the male buckle 3 needs to pass through the through hole 5, if the female buckle 4 cannot be deformed, the distance between the female buckle 4 and the lower housing 2 should be greater than the thickness of the male buckle 3, so that the hook part 301 of the male buckle 3 can pass smoothly through the through hole 5. This utility model sets a deformable lever 401 on the female buckle 4, so that the gap of the through hole 5 at the lever 401 is no longer limited by the size of the male buckle 3. Even if L1 < L2, the male buckle 3 can pass smoothly through the through hole 5 through the deformation of the lever 401. During the installation stage, the lever 401 is deformed under the pressure of the male buckle 3. The deformation is relatively easy and it can be easily installed. If the male buckle 3 wants to get out of the through hole 5, the lever 401 needs to be bent outward manually, which is very difficult. Therefore, it can play a self-locking and anti-disassembly role.

[0025] Example 1 like Figures 1-7 As shown, a casing anti-disassembly structure includes an upper casing 1, a lower casing 2, a male buckle 3 disposed on the outer periphery of the upper casing 1, and a female buckle 4 disposed on the outer periphery of the lower casing 2. A through hole 5 is formed between the female buckle 4 and the lower casing 2 for the male buckle 3 to pass through. The end of the female buckle 4 is provided with a lever 401. When the male buckle 3 is installed, it abuts against the lever 401 to deform it, so that the male buckle 3 passes through the through hole 5 and is locked on the lever 401.

[0026] The method of forming the pick 401 is as follows: The female buckle 4 has an outer plate 402 that is parallel to and opposite to the outer side of the lower housing 2. The outer plate 402 has two grooves 6 at the end away from the upper housing 1, and the lever 401 is located between the two grooves 6. The grooves 6 are arranged such that the lever 401 is connected to the outer plate 402 on only one side, and the other sides are suspended, thus providing elasticity.

[0027] In this embodiment, the inner surface of the paddle 401 is a ramp 7 inclined towards the lower housing 2, and the minimum distance H1 between the ramp 7 and the lower housing 2 is less than the minimum distance H2 between the outer plate 402 and the lower housing 2. Figure 4 and Figure 5 As shown, the paddle 401 is positioned above the outer plate 402. The through hole 5 on the inner side of the outer plate 402 has a relatively large gap, allowing the male buckle 3 to pass through without requiring deformation of the outer plate 402. The through hole 5 on the inner side of the paddle 401 has a smaller gap, serving as an anti-disassembly function. In this embodiment, the horizontal distance L1 that the male buckle 3 moves from the engaged state to the state of abutting against the lower housing 2 is as follows: Figure 6 As shown.

[0028] Structure of male buckle 3: The male buckle 3 includes a connecting plate 302 suitable for insertion into the through hole 5 and a hook 301 located at one end of the connecting plate 302. The other end of the connecting plate 302 is connected to the upper housing 1. The surface of the hook 301 has a second guide slope 8. When the male buckle 3 is about to enter the through hole 5, the second guide slope 8 impacts the end of the female buckle 4, causing the connecting plate 302 to deform.

[0029] like Figure 4 As shown, when installing the upper housing 1 and the lower housing 2, the lower end of the female buckle 4 will preferentially impact the second guide slope 8 of the male buckle 3. As the upper housing 1 and the lower housing 2 are slowly pressed, the second guide slope 8 guides the connecting plate 302 to deform, and the male buckle 3 will slowly slide along the inner wall of the female buckle 4. During the fastening process, a critical point will be reached, at which point the tip of the female buckle 4 and the tip of the male buckle 3 are tangent (e.g., ...). Figure 5 As shown), however, the mating surfaces 12 of the upper shell 1 and the lower shell 2 still maintain a distance at this time; otherwise, the upper shell 1 and the lower shell 2 cannot be properly fastened. During the continued fastening process, the upper end of the female buckle 4 will quickly spring back, and the male buckle 3 will also continue to spring back, thus forming a self-locking mechanism (as shown). Figure 6 (As shown).

[0030] When disassembling, the male buckle 3 needs to be pressed tightly against the lower housing 2. However, due to the distance difference between L1 and L2, pressing the male buckle 3 alone is not enough to make it retract into the through hole 5. It is necessary to pry open the pry bar 401 at the upper end of the female buckle 4, making disassembly quite difficult.

[0031] Example 2 The difference between this embodiment and Embodiment 1 lies in the way the movement space of the male buckle 3 is reduced when it reaches the position of the paddle 401. Specifically, as follows: Figure 8 As shown, the lower housing 2 has a limiting boss 201 located in front of the female buckle 4 along the insertion direction of the male buckle 3. The surface of the limiting boss 201 facing the through hole 5 is a first guide slope 9. Under the guidance of the first guide slope 9, the male buckle 3 is engaged with the female buckle 4.

[0032] like Figure 10 As shown, during installation, the second guide slope 8 of the male buckle 3 will first touch the lower end of the female buckle 4. Under the action of external force, the male buckle 3 will undergo elastic deformation. As the upper housing 1 and lower housing 2 are slowly pressed, the hook 301 of the male buckle 3 will slide upward against the inner side of the female buckle 4 (as shown). Figure 11 As shown), continue pressing the upper housing 1 and the lower housing 2, the hook 301 of the male buckle 3 will first hit the first guide slope 9 of the limiting boss 201 (as shown). Figure 12 As shown), the limiting boss 201 will exert an outward pushing force on the male buckle 3 along the first guide slope 9, causing the paddle 401 to undergo elastic deformation, ensuring that the hook 301 is smoothly pushed out, and the installation is completed (as shown). Figure 9 (As shown).

[0033] In this embodiment, the abutment state of the male buckle 3 and the lower housing 2 refers to the state in which the male buckle 3 abuts against the limiting boss 201 on the surface of the lower housing 2. The horizontal distance L1 that the male buckle 3 moves from the engaged state to the abutment state with the lower housing 2 is as follows: Figure 9 As shown. Since the moving distance L1 of the male buckle 3 is less than the horizontal length L2 of the mating surface between the male buckle 3 and the paddle 401, pressing the buckle to disassemble it is not feasible. After installation, the buckle structure formed by the male buckle 3 and the female buckle 4 forms a self-locking mechanism with the limiting boss 201. If disassembly is required, the limiting boss 201 or the buckle structure must be destroyed to release the self-locking before disassembly can be performed.

[0034] If the male buckle 3 does not reach the lever 401 when it initially contacts the limiting boss 201 during installation, a jamming phenomenon will occur. Therefore, in this embodiment, when the male buckle 3 abuts during insertion, it contacts the lever 401. At this time, the male buckle 3 can easily push open the lever 401 with the help of the first guide slope 9 of the limiting boss 201. Specifically, let the depth of the groove 6 be L4. When the male buckle 3 contacts the limiting boss 201 during insertion, the maximum distance from the contact part of the male buckle 3 and the female buckle 4 to the end of the lever 401 is L3. Then L3 < L4, that is, the contact part of the male buckle 3 and the female buckle 4 is completely located on the lever 401, and the lever 401 deforms more easily. When the installation is completed, the hook 301 and the lever 401 rebound to complete the locking. If L3 > L4, the hook 301 partially contacts the outer plate 402, and the hook 301 has no unloading force. Continued pressure may damage the structure.

[0035] In the width direction, when the male buckle 3 moves to the lever 401, if the width of the male buckle 3 is too large, it will cross the groove 6 and contact the outer plate 402, which will also affect the deformation of the lever 401. Therefore, in this embodiment, it is preferable that the width of the male buckle 3 is less than or equal to the maximum distance between the two grooves 6, specifically referring to the width of the part of the male buckle 3 used to push the lever 401, that is, the width of the hook 301. In addition, the difference between the width of the lever 401 and the width of the male buckle 3 should not be too large, so that the exposed size of the end of the lever 401 is small, so that after-sales personnel do not have enough space to pull the lever 401 outward. In the preferred embodiment, the difference between the width of the lever 401 and the width of the male buckle 3 is 1mm to 2mm.

[0036] Example 3 A type of drainage motor, such as Figure 13 As shown, the device includes a synchronous motor 10, a gear set 11, and the aforementioned anti-disassembly structure for the housing. The gear set 11 is connected to the output shaft of the synchronous motor 10. The upper housing 1 and the lower housing 2 in the anti-disassembly structure for the housing form a cavity to accommodate the synchronous motor 10 and the gear set 11.

[0037] In the description of this utility model, it should be understood that the terms "width", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0039] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A casing anti-disassembly structure, characterized in that: The device includes an upper housing (1), a lower housing (2), a male buckle (3) disposed on the outer periphery of the upper housing (1), and a female buckle (4) disposed on the outer periphery of the lower housing (2). A through hole (5) is formed between the female buckle (4) and the lower housing (2) for the male buckle (3) to pass through. The end of the female buckle (4) is provided with a lever (401). When the male buckle (3) is installed, it abuts against the lever (401) to deform it, so that the male buckle (3) passes through the through hole (5) and is locked on the lever (401). The horizontal distance that the male buckle (3) moves from the locked state to the state of abutting against the lower housing (2) is L1, and the horizontal length of the locking surface between the male buckle (3) and the lever (401) is L2, that is, L1 < L2.

2. The anti-disassembly structure for the casing according to claim 1, characterized in that: The female buckle (4) has an outer plate (402) that is parallel to and opposite to the outer side of the lower housing (2). The outer plate (402) has two grooves (6) at one end away from the upper housing (1), and the paddle (401) is located between the two grooves (6).

3. The anti-disassembly structure for the casing according to claim 2, characterized in that: The inner surface of the lever (401) is a slope (7) inclined towards the lower housing (2), and the minimum distance H1 between the slope (7) and the lower housing (2) is less than the minimum distance H2 between the outer plate (402) and the lower housing (2).

4. The anti-disassembly structure for the casing according to claim 2, characterized in that: The lower housing (2) has a limiting boss (201) located in front of the female buckle (4) along the insertion direction of the male buckle (3). The surface of the limiting boss (201) facing the through hole (5) is a first guide slope (9). The male buckle (3) is engaged with the female buckle (4) under the guidance of the first guide slope (9).

5. The anti-disassembly structure for the casing according to claim 4, characterized in that: When the male buckle (3) abuts against the limiting boss (201) during insertion, the male buckle (3) contacts the paddle (401).

6. The anti-disassembly structure for the casing according to claim 5, characterized in that: Let the depth of the groove (6) be L4. When the male buckle (3) contacts the limiting boss (201) during insertion, the maximum distance from the contact part of the male buckle (3) and the female buckle (4) to the end of the lever (401) is L3, then L3 < L4.

7. The anti-disassembly structure for the casing according to claim 2, characterized in that: The width of the male buckle (3) is less than or equal to the maximum distance between the two grooves (6).

8. The anti-disassembly structure for the casing according to claim 7, characterized in that: The difference between the width of the paddle (401) and the width of the male buckle (3) is 1mm to 2mm.

9. The anti-disassembly structure for the casing according to any one of claims 1-8, characterized in that: The male buckle (3) includes a connecting plate (302) suitable for insertion into the through hole (5) and a hook (301) located at one end of the connecting plate (302). The other end of the connecting plate (302) is connected to the upper housing (1). The surface of the hook (301) has a second guide slope (8). When the male buckle (3) is about to enter the through hole (5), the second guide slope (8) impacts the end of the female buckle (4) to deform the connecting plate (302).

10. A drainage motor, characterized in that: The device includes a synchronous motor (10), a gear set (11), and a housing anti-disassembly structure as described in any one of claims 1-9. The gear set (11) is connected to the output shaft of the synchronous motor (10), and the upper housing (1) and the lower housing (2) in the housing anti-disassembly structure form a cavity for accommodating the synchronous motor (10) and the gear set (11).

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