An anti-pollution water drainage device based on double eccentric wheels and its design method

Abstract

The present invention discloses an anti-pollution water draining device based on double eccentric wheels and its design method, including a bottom bracket. Installation seats are provided at both ends of the bottom bracket. A positioning device is installed on one side of the installation seat. An unlocking device is provided at one end of the bottom bracket. The positioning device includes a fixed frame and an eccentric wheel. An elastic friction layer is fixedly wrapped on the surface of the eccentric wheel. Eccentric shafts are provided at both ends of the eccentric wheel. The eccentric shafts are rotatably installed on the surfaces of both ends of the fixed frame. Installation blocks are provided at both ends of the fixed frame. The installation blocks are installed on the surface of the installation seat by screws. In this solution, by connecting a return torsion spring and a synchronous permanent magnet, combined with a traction wire, it can be twisted and reset for clamping, and at the same time, it is convenient to pull and separate for unlocking, ensuring the stability of synchronization. By installing an unlocking button and a traction rod, it can be manually pushed for unlocking, which is convenient for adjustment and beneficial for operation and use.

Description

Technical Field

[0001] The present invention relates to the field of draining of mugs, and more specifically, to an anti-pollution draining device based on double eccentric wheels and its design method. Background Art

[0002] In current daily life, the use of mugs is very common.

[0003] Usually when we drink water, tea or coffee, we often use a cup with a handle, that is, a mug. After use and cleaning, it generally needs to be inverted or hung to drain. If it is inverted, the cup mouth will contact the support, causing pollution of the cup mouth; if the hanging method is adopted, because most handles are designed to be wider at the top and narrower at the bottom for easy gripping, or due to the center of gravity position, after hanging, the cup mouth is slightly higher than the cup bottom, that is, the opening is upward, which not only cannot drain quickly but also easily accumulates dust.

[0004] Therefore, it is necessary to design a draining device to solve the existing problems. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an anti-pollution draining device based on double eccentric wheels and its design method, which is installed and positioned through a bottom bracket and combined with an unlocking device to solve the problems of draining and anti-pollution.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An anti-pollution draining device based on double eccentric wheels and its design method, including a bottom bracket, both ends of the bottom bracket are provided with mounting seats, one side of the mounting seat is installed with a positioning device, one end of the bottom bracket is provided with an unlocking device, the positioning device includes a fixed frame and an eccentric wheel, the surface of the eccentric wheel is fixedly wrapped with an elastic friction layer, both ends of the eccentric wheel are provided with eccentric shafts, the eccentric shafts are rotatably installed on the surfaces of both ends of the fixed frame, both ends of the fixed frame are provided with mounting blocks, and the mounting blocks are installed on the surface of the mounting seat through screws;

[0008] The design method of the draining device includes the following steps:

[0009] S1. According to requirements, select the type of fixed structure, fix it by the way of clamping on both sides, and adopt a double eccentric wheel clamping structure;

[0010] S2. Design the parameters of the clamping structure, and require the minimum distance and the maximum distance without considering the thickness of the high friction layer, that is, the width of the mug handle that can be compatible is such that it basically covers most common handled cups on the current market;

[0011] S3. Design the reset and synchronous drive mode. To enable the eccentric wheel to firmly clamp the cup handle, a suitable mechanism must be provided to generate the driving force for its reset. Since the effective working stroke of the eccentric wheel is set to be approximately 90°, a torsion spring with a rotation angle not less than 90° can be selected.

[0012] S4. Design the alignment structure to ensure that the eccentric wheels rotate synchronously with a certain accuracy.

[0013] S5. Select rubber as the friction material to form an elastic friction layer.

[0014] S6. Set the preset angle to ensure that the cup handle can smoothly enter between the two eccentric wheels.

[0015] S7. Design an unlocking device for unlocking.

[0016] S8. Conduct force analysis calculations and physical manufacturing inspections to complete the design.

[0017] Furthermore, a reset torsion spring is provided on the surface of the eccentric shaft, and one end of the reset torsion spring is fixedly connected to the surface of the fixed frame.

[0018] Furthermore, synchronous permanent magnets are fixedly connected to both end surfaces of the eccentric wheel. There are four synchronous permanent magnets, and the polarities of adjacent positions are opposite.

[0019] Furthermore, a fixed block is provided on one end surface of the eccentric wheel, and a traction wire is fixedly connected to the surface of the fixed block. By connecting the reset torsion spring and the synchronous permanent magnets and combining with the traction wire, it can be twisted for resetting and clamping, and at the same time, it is convenient for traction separation for unlocking, ensuring the stability of synchronization.

[0020] Furthermore, the unlocking device includes an installation cylinder and an unlocking push rod. The installation cylinder is fixedly connected to the surface of the bottom bracket, and the unlocking push rod is slidably connected to the side surface of the installation cylinder. By installing the unlocking push rod, it is beneficial for pushing and adjusting, facilitating unlocking control.

[0021] Furthermore, a traction rod is provided at one end of the unlocking push rod, and one end of the traction rod is fixedly connected to one end of the traction wire.

[0022] Furthermore, an unlocking button is provided at the other end of the unlocking push rod. The unlocking button is located at the side surface of one end of the bottom bracket. By installing the unlocking button and the traction rod, it can be manually pushed for unlocking, facilitating adjustment and operation.

[0023] Furthermore, a guide groove is provided at one end of the bottom bracket, and the guide groove sleeves the two end surfaces of the traction rod.

[0024] Furthermore, limit magnets are provided at one end of the bottom bracket and the traction rod, and the limit magnets are permanent magnet structures with opposite polarities.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] (1) In this solution, by connecting the reset torsion spring and the synchronous permanent magnet and combining with the traction wire, it can be twisted and reset for clamping, and at the same time, it is convenient to separate the traction for unlocking, ensuring the stability of synchronization.

[0027] (2) By installing the unlocking push rod, it is beneficial to push and adjust, facilitating unlocking control.

[0028] (3) By installing the unlocking button and the traction rod, it can be manually pushed for unlocking, which is convenient for adjustment and beneficial for operation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a partial schematic diagram of the connection of the square positioning block of the present invention;

[0031] Figure 3 is a side sectional view of the connection of the square positioning block of the present invention;

[0032] Figure 4 is a schematic diagram of the design parameters of the double eccentric wheels of the present invention;

[0033] Figure 5 is a schematic diagram for analyzing the reasons for the blockage caused by the high-friction surface of the double eccentric wheels of the present invention;

[0034] Figure 6 is an analysis diagram of the force direction and movement trajectory of the force application point of the eccentric wheel of the present invention;

[0035] Figure 7 is a calculation diagram of the pre-deviation angle of the present invention.

[0036] Explanation of the reference numerals in the drawings:

[0037] 1 bottom bracket, 11 mounting seat, 12 positioning device, 13 unlocking device, 14 fixed frame, 15 eccentric shaft, 16 eccentric wheel, 17 mounting block, 18 reset torsion spring, 19 synchronous permanent magnet, 2 fixed block, 21 traction wire, 22 elastic friction layer, 23 mounting cylinder, 24 unlocking push rod, 25 traction rod, 26 unlocking button, 27 limit magnet, 28 guide groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figure 1 and Figure 2 , an anti-pollution water draining device based on double eccentric wheels and its design method, including a bottom bracket (1), both ends of the bottom bracket (1) are provided with mounting seats (11), a positioning device (12) is installed on one side of the mounting seat (11), an unlocking device (13) is provided at one end of the bottom bracket (1), the positioning device (12) includes a fixed frame (14) and an eccentric wheel (16), the surface of the eccentric wheel (16) is fixedly wrapped with an elastic friction layer (22), both ends of the eccentric wheel 16 are provided with eccentric shafts 15, the eccentric shafts 15 are rotatably installed on the surfaces of both ends of the fixed frame 14, both ends of the fixed frame 14 are provided with mounting blocks 17, and the mounting blocks 17 are installed on the surface of the mounting seat 11 by screws;

[0041] The design method of the water draining device includes the following steps:

[0042] S1. According to requirements, select the type of fixed structure, fix it by the way of clamping on both sides, and adopt a double eccentric wheel clamping structure;

[0043] S2. Design the parameters of the clamping structure, and require the minimum distance and the maximum distance without considering the thickness of the high friction layer, that is, the width of the handle of the compatible mug can cover most of the common handled cups on the market at present;

[0044] S3. Design the reset and synchronous drive mode. In order to make the eccentric wheel tightly clamp the cup handle, a suitable mechanism must be generated to produce the driving force for its reset. Since the effective working stroke of the eccentric wheel is set to be about 90°, a torsion spring not less than 90° can be selected;

[0045] S4. Design the alignment structure to ensure that the eccentric wheels rotate synchronously with a certain accuracy;

[0046] S5. Select the friction material to form an elastic friction layer;

[0047] S6. Preset the angle to ensure that the cup handle can smoothly enter between the two eccentric wheels;

[0048] S7. Design the unlocking device for unlocking;

[0049] S8. Conduct force analysis and calculation, and perform physical manufacturing inspection to complete the design.

[0050] A return torsion spring 18 is provided on the surface of the eccentric shaft 15. One end of the return torsion spring 18 is fixedly connected to the surface of the fixed frame 14. Synchronous permanent magnets 19 are fixedly connected to both end surfaces of the eccentric wheel 16. There are four synchronous permanent magnets 19, and the polarities of adjacent positions are opposite. A fixed block 2 is provided on one end surface of the eccentric wheel 16, and a traction wire 21 is fixedly connected to the surface of the fixed block 2. By connecting the return torsion spring and the synchronous permanent magnets and combining with the traction wire, it can twist and reset for clamping, and at the same time, it is convenient to traction and separate for unlocking, ensuring the stability of synchronization.

[0051] Embodiment 2

[0052] Please refer to Figure 1 and Figure 3 , an anti-pollution water drainage device based on double eccentric wheels and its design method, including a bottom bracket 1. Mounting seats 11 are provided at both ends of the bottom bracket 1. A positioning device 12 is installed on one side of the mounting seat 11. An unlocking device 13 is provided at one end of the bottom bracket 1. The positioning device 12 includes a fixed frame 14 and an eccentric wheel 16. An elastic friction layer 22 is fixedly wrapped on the surface of the eccentric wheel 16. Eccentric shafts 15 are provided at both ends of the eccentric wheel 16. The eccentric shafts 15 are rotatably installed on the surface of both ends of the fixed frame 14. Mounting blocks 17 are provided at both ends of the fixed frame 14. The mounting blocks 17 are installed on the surface of the mounting seat 11 by screws;

[0053] The unlocking device 13 includes an installation cylinder 23 and an unlocking push rod 24. The installation cylinder 23 is fixedly connected to the surface of the bottom bracket 1. The unlocking push rod 24 is slidably connected to the side of the installation cylinder 23. By installing the unlocking push rod, it is beneficial to push and adjust, and convenient for unlocking control. One end of the unlocking push rod 24 is provided with a traction rod 25. One end of the traction rod 25 is fixedly connected to one end of the traction wire 21. The other end of the unlocking push rod 24 is provided with an unlocking button 26. The unlocking button 26 is located at the side position of one end of the bottom bracket 1. By installing the unlocking button and the traction rod, it can be manually pushed for unlocking, which is convenient for adjustment and beneficial for operation and use. A guiding groove 28 is provided at one end of the bottom bracket 1. The guiding groove 28 is sleeved on the surface of both ends of the traction rod 25. Limiting magnets 27 are provided at one end of both the bottom bracket 1 and the traction rod 25. The limiting magnets 27 are permanent magnet structures with opposite polarities.

[0054] When in use, the handle of the mug can be inserted between the two eccentric wheels 16, so that it can rotate frictionally through the elastic friction layer 22. After the eccentric wheel 16 rotates around the eccentric shaft 15, a gap is formed to position the handle. Combined with the return torsion spring 18 for clamping and positioning, it can ensure that the mug is tilted and inverted, improving the water drainage effect, while avoiding dust accumulation and cup mouth pollution, which is safe and efficient. When unlocking is required, the unlocking button 26 can be pushed, and the unlocking push rod 24 drives the traction rod 25 to pull the traction wire 21, which can pull the eccentric wheel 16 to continue rotating to expand the middle gap, facilitating the removal of the mug and convenient operation and use.

[0055] Embodiment 3

[0056] Please refer to Figure 4 and Figure 5 , and the minimum distance d that does not count the thickness of the high friction layer is required min = 3mm, the maximum distance d max = 25mm, that is, the compatible width of the mug handle is 5 - 23mm, basically covering most of the common handled cups on the market at present (if a larger range is required, the parameters can be modified according to the actual situation and the following calculation method). Let the center distance between the two eccentric wheels be d ax , the eccentricity is e, the radius of the eccentric wheel circle is r, the maximum major radius r max and the minimum major radius r min . The following conditions must be met for these several parameters:

[0057] r max + r min = 2·r (1)

[0058] d ax - 2·r min ≥ d max (2)

[0059] 0 ≤ d ax - 2·r max ≤ d min (3)

[0060] In the prototype, take:

[0061] r min ≥ 5mm (4)

[0062] If the effective working stroke adopted is about 180°, then from formula (2) and formula (4), the wheelbase d ax needs to meet the condition:

[0063] d ax ≥ 35mm (5)

[0064] To ensure that the response time of the device is as short as possible, that is, for the same handle width, the angle at which the eccentric wheel rotates to the appropriate position is as small as possible. If the effective working stroke is about 90°, then equation (2) can be modified as follows:

[0065] d ax -2·r≥d max (6)

[0066] Because when the handle is pushed between the two eccentric wheels, it should be as labor-saving as possible. The eccentric wheel is designed as a labor-saving lever, that is, the ratio of r max to the return spring force arm is larger, or in other words, the larger the eccentricity e, the more labor-saving it is (for the same return spring torque). However, at the same time, the diameter of the eccentric wheel cannot be made too large, resulting in an increase in the volume of the device. Therefore, take:

[0067] r≈3·r min (7)

[0068] From equations (6), (7) and (4), the wheelbase d ax needs to meet the following conditions:

[0069] d ax ≥55mm(8)

[0070] Since high-friction materials with a thickness of about 1 mm need to be mounted on the outside of the two eccentric wheels, in the prototype, take:

[0071] d ax =57mm (9)

[0072] Combined with the above-mentioned formulas, we can get:

[0073] r=16mm (10)

[0074] e=11mm (11)

[0075] That is, when the diameter of the eccentric wheel is 32 mm, the eccentricity is 11 mm, and the wheelbase is 57 mm, the design requirements can be met.

[0076] Example 4

[0077] Please refer to Figure 6 and Figure 7 , after mounting the high-friction material, due to the large friction force at the contact part between the cup handle and the eccentric wheel, it cannot smoothly enter the middle of the two wheels. This is because if the initial relative position of the eccentric wheel is at the maximum radial position, for two points (points A and B in the figure) on the outer edge of the cup handle with a certain width that just come into contact with the eccentric wheel, when pushed inward, the distance will first decrease (i.e., |A′B′|<|AB|), and then increase. However, due to the large friction force, there is no relative sliding between the eccentric wheel and the cup handle, and the cup handle generally cannot be squeezed and deformed, so it causes blockage or even jamming.

[0078] In order to ensure that the cup handle can smoothly enter between the two wheels when pushed in, it is required that the distance between the corresponding points on the two eccentric wheels does not first decrease and then increase; or the degree of decrease can be offset by the deformation of the outer layer material; or the torsional moment generated by the thrust is greater than the frictional moment generated by the pressure component, causing sliding between the eccentric wheel and the cup handle, and pushing the eccentric wheel to the appropriate position.

[0079] According to the foregoing calculation, as shown in the following figure, the thrust F acting on point C can be decomposed into: the torsional force U in the tangential direction of the arc CC′ of the movement trajectory of point C and the normal pressure N. If the torsional force is greater than the frictional force, that is:

[0080] U>μ·N (12)

[0081] where μ is the friction coefficient between the cup handle and the surface of the eccentric wheel. Then, sliding occurs between the eccentric wheel and the cup handle, and the eccentric wheel is pushed to a suitable position with the cup handle. Coupled with the appropriate deformation of the surface material, the cup handle can smoothly enter between the two eccentric wheels.

[0082] The exact value (or available range) θ of the pre-deflection angle can be calculated according to the design requirements: The maximum compatible cup handle width designed is 25 mm (this is the case without considering the thickness of the friction layer. If the thickness of the friction layer is added, it is about 23 mm). Take half of it for calculation, that is, 12.5 mm. Since the designed axle distance of the eccentric wheel is 57 mm, assuming that the outer edge line of the cup handle is a right angle, the contact point with the cross-section of the eccentric wheel is point P which is 16 mm from the Figure 5 y-axis.

[0083] The equation of the eccentric wheel changes from the original one with O′ as the center:

[0084] (x - 11) 2 + y 2 =256 (13)

[0085] After deflecting around point O to the one with O′ as the center:

[0086] (x - 11·cosθ) 2 +(y + 11·sinθ) 2 =256 (14)

[0087] Then the angle α′ between the line segment OP and the x-axis satisfies:

[0088]

[0089] where x P =16 mm. Substituting it into formula (14) gives the relationship between y P and θ:

[0090]

[0091] Substituting this equation into formula (15) gives the relationship between α′ and θ:

[0092]

[0093] From this, the lengths of line segments OP and OP′ can be obtained:

[0094]

[0095] Substitute formula (17) into formula (18). According to the aforementioned design, the surface material can deform by about 1 mm. Therefore, |OP| is denoted as 17 mm, that is:

[0096]

[0097] It can be solved that θ≈0.8017054384030641 (radians, approximately 45.9°) and another solution

[0098] θ≈1.491107798000356 (radians, approximately 85.4°). However, since the latter solution is close to 90°, it does not meet the design requirements. Therefore, the former solution is taken. This is the required pre - deflection angle when completely relying on the deformation of the surface material. If considering the situation where the cup handle and the eccentric wheel slide after reaching a certain angle, and the actual factors such as the thickness of the friction layer and the smoother outer edge of the cup handle, the distance |OP| between the axis and the contact point will be a little larger. The length can be increased by 1 - 2 mm. That is, when taking 19 mm, it is solved that

[0099] θ≈0.4299418243198151 (radians, approximately 24.6°). In the prototype, to maintain a certain margin, the compromise integer value of 32° is taken. Therefore, the central axis of the magnet is parallel to the x - axis passing through O′.

[0100] The above - mentioned is only the preferred specific implementation mode of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A pollution-proof water draining device based on double eccentric wheels, comprising a bottom bracket (1), characterized in that: Both ends of the bottom bracket (1) are provided with mounting seats (11). A positioning device (12) is installed on one side of the mounting seat (11). An unlocking device (13) is provided at one end of the bottom bracket (1). The positioning device (12) includes a fixed frame (14) and an eccentric wheel (16). The surface of the eccentric wheel (16) is fixedly wrapped with an elastic friction layer (22). Both ends of the eccentric wheel (16) are provided with eccentric shafts (15). The eccentric shafts (15) are rotatably installed on the surfaces of both ends of the fixed frame (14). Both ends of the fixed frame (14) are provided with mounting blocks (17). The mounting blocks (17) are installed on the surface of the mounting seat (11) by screws; Synchronous permanent magnets (19) are fixedly connected to both end surfaces of the eccentric wheel (16). There are four synchronous permanent magnets (19), and the polarities of adjacent positions are opposite; The design method of this water draining device includes the following steps: S1. Select the type of fixed structure and use a double eccentric wheel clamping structure for fixation; S2. Design the parameters of the clamping structure, requiring the minimum distance, maximum distance regardless of the thickness of the elastic friction layer, and the width of the handle of the mug that the clamping structure can accommodate is 5 mm to 23 mm; S3. Design the reset and synchronous drive methods. In order to make the eccentric wheel tightly clamp the cup handle, a suitable mechanism must be generated to produce the driving force for its reset. Since the effective working stroke of the eccentric wheel is set to 90°, a torsion spring not less than 90° is selected; S4. Design the alignment structure to ensure the synchronous rotation of the eccentric wheels; S5. Select the friction material to form an elastic friction layer; S6. Set the preset angle to ensure that the cup handle smoothly enters between the two eccentric wheels; S7. Design the unlocking device for unlocking; S8. Conduct force analysis calculations and physical manufacturing inspections to complete the design.

2. The anti-pollution water drainage device based on double eccentric wheels according to claim 1, characterized in that: A reset torsion spring (18) is provided on the surface of the eccentric shaft (15). One end of the reset torsion spring (18) is fixedly connected to the surface of the fixed frame (14).

3. The anti-pollution water draining device based on double eccentric wheels according to claim 1, characterized in that: A fixed block (2) is provided on one end surface of the eccentric wheel (16). A traction wire (21) is fixedly connected to the surface of the fixed block (2).

4. A pollution-proof water draining device based on a double eccentric wheel according to claim 1, characterized in that: The unlocking device (13) includes an installation cylinder (23) and an unlocking push rod (24). The installation cylinder (23) is fixedly connected to the surface of the bottom bracket (1). The unlocking push rod (24) is slidably connected to the side surface of the installation cylinder (23).

5. The anti-pollution water draining device based on double eccentric wheels according to claim 4, wherein: One end of the unlocking push rod (24) is provided with a traction rod (25). One end of the traction rod (25) is fixedly connected to one end of the traction wire (21).

6. The anti-pollution water draining device based on double eccentric wheels according to claim 5, characterized in that: The other end of the unlocking push rod (24) is provided with an unlocking button (26). The unlocking button (26) is located at the side surface position of one end of the bottom bracket (1).

7. The anti-pollution water draining device based on double eccentric wheels according to claim 1, characterized in that: A guide groove (28) is provided at one end of the bottom bracket (1). The guide groove (28) is sleeved on the surfaces of both ends of the traction rod (25).

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