CN115590450A - An anti-pollution drainage device based on double eccentric wheels and its design method - Google Patents

Abstract

The invention discloses an anti-pollution draining device based on double eccentric wheels and a design method thereof. One end of the bottom bracket is provided with an unlocking device, and 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, and an eccentric shaft is provided at both ends of the eccentric wheel. Rotationally installed on the surface of both ends of the fixed frame, the two ends of the fixed frame are provided with mounting blocks, and the mounting blocks are mounted on the surface of the mounting seat through screws. , can be twisted and reset for clamping, and at the same time it is convenient to pull and separate for unlocking to ensure the stability of synchronization. By installing the unlock button and drawbar, it can be manually pushed to unlock, which is convenient for adjustment and convenient for operation and use.

Description

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

technical field

The invention relates to the field of mug draining, more specifically, to an anti-pollution draining device based on double eccentric wheels and a design method thereof.

Background technique

In today's daily life, the use of mugs is very common.

Usually when we drink water, tea or coffee, we often use a cup with a handle, that is, a mug (mug). After use and cleaning, it is generally necessary to turn it upside down or hang it to drain. If it is turned upside down, it will cause the cup mouth to contact with the support, causing pollution to the cup mouth; if the hanging method is used, most of the handles are for easy grip The holder is designed to be wide at the top and narrow at the bottom, or because of the position of the center of gravity, the mouth of the cup is slightly higher than the bottom of the cup after hanging, that is, the opening is upward, which can neither drain water quickly nor accumulate dust easily.

Therefore need to design a kind of drainage device to solve existing problem

Contents of the invention

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. The positioning device is installed through the bottom bracket and combined with the unlocking device to solve the problems of draining and pollution prevention. question.

In order to solve the above problems, the present invention adopts the following technical solutions.

An anti-pollution draining device based on double eccentric wheels and a design method thereof, comprising a bottom bracket, mounting seats are provided at both ends of the bottom bracket, a positioning device is installed on one side of the mounting seat, and a positioning device is installed on the bottom bracket. One end 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, and the two ends of the eccentric wheel are provided with an eccentric shaft, and the eccentric shaft is rotatably mounted on a fixed The two ends of the frame, the two ends of the fixed frame are provided with mounting blocks, and the mounting blocks are installed on the surface of the mounting seat by screws;

The design method of this drainage device comprises the steps:

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

S2. Design the clamping structure parameters, requiring the minimum spacing and maximum spacing regardless of the thickness of the high friction layer, that is, the width of the compatible mug handle is , which basically covers most of the common handle mugs currently on the market;

S3. Design the reset and synchronous driving mode. In order to make the eccentric wheel tightly clamp the cup handle, there must be a suitable mechanism to generate the driving force to reset it. Because the effective working stroke of the eccentric wheel is set to be about 90°, Therefore, the torsion spring not less than 90° can be selected;

S4. Design the alignment structure to ensure that the eccentric wheel rotates synchronously with a certain precision;

S5, selecting rubber as the friction material to form an elastic friction layer;

S6. The preset angle setting ensures that the cup handle smoothly enters between the two eccentric wheels;

S7, designing an unlocking device and unlocking;

S8. Carry out force analysis and calculation and physical manufacturing inspection to complete the design.

Further, a return torsion spring is provided on the surface of the eccentric shaft, and one end of the return torsion spring is fixedly connected to the surface of the fixed frame.

Further, both ends of the eccentric wheel are fixedly connected with synchronous permanent magnets, and there are four synchronous permanent magnets, and the polarities of adjacent positions are opposite.

Further, one end surface of the eccentric wheel is provided with a fixed block, and the surface of the fixed block is fixedly connected with a traction steel wire. By connecting the reset torsion spring and the synchronous permanent magnet, combined with the traction steel wire, it can be twisted and reset for clamping, and at the same time It is convenient to pull and separate for unlocking to ensure the stability of synchronization.

Further, the unlocking device includes a mounting cylinder and an unlocking push rod, the mounting cylinder is fixedly connected to the surface of the bottom bracket, and the unlocking push rod is slidably connected to the side of the mounting cylinder, by installing the unlocking push rod, it is convenient to push and adjust, Convenient unlock control.

Further, one end of the unlocking push rod is provided with a draw bar, and one end of the draw bar is fixedly connected to one end of the draw wire.

Further, the other end of the unlocking push rod is provided with an unlocking button, and the unlocking button is located on the side of one end of the bottom bracket. By installing the unlocking button and the tow bar, it can be manually pushed to unlock, which is convenient for adjustment and convenient for operation and use.

Further, one end of the bottom bracket is provided with a guide groove, and the guide groove is sleeved on both ends of the drawbar.

Further, both the bottom bracket and one end of the drawbar are provided with limit magnets, and the limit magnets are permanent magnet structures with opposite polarities.

Compared with the prior art, the present invention has the advantages of:

(1) In this solution, by connecting the reset torsion spring and the synchronous permanent magnet, combined with the traction steel wire, it can be twisted and reset for clamping, and at the same time it is convenient for traction and separation to unlock, ensuring the stability of synchronization.

(2) By installing the unlocking push rod, it is beneficial to push the adjustment and facilitate the unlocking control.

(3) By installing the unlock button and the tow bar, it can be manually pushed to unlock, which is convenient for adjustment and convenient for operation and use.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the local schematic diagram that square positioning block of the present invention connects;

Fig. 3 is the side sectional view that the square positioning block of the present invention connects;

Fig. 4 is a schematic diagram of design parameters of double eccentric wheels of the present invention;

Fig. 5 is a schematic diagram of analysis of causes of stagnation caused by the high-friction surface of double eccentric wheels of the present invention;

Fig. 6 is the stressed direction and motion trajectory analysis diagram of the stressed point of the eccentric wheel of the present invention;

Fig. 7 is a calculation diagram of the pre-deflection angle of the present invention.

Explanation of symbols in the figure:

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 draw bar, 26 unlocking button, 27 limit magnet, 28 guide groove.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only part of the embodiments of the present invention, not all embodiments, based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Please refer to Fig. 1 and Fig. 2, a kind of anti-pollution drainage device and design method thereof based on double eccentric wheels, comprising a bottom bracket (1), and the two 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), and 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), the two ends of the eccentric wheel 16 are provided with an eccentric shaft 15, and the eccentric shaft 15 is rotatably mounted on both ends of the fixed frame 14 On the surface, the two 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;

The design method of this drainage device comprises the steps:

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

S2. Design the clamping structure parameters, requiring the minimum spacing and maximum spacing regardless of the thickness of the high friction layer, that is, the width of the compatible mug handle is , which basically covers most of the common handle mugs currently on the market;

S3. Design the reset and synchronous driving mode. In order to make the eccentric wheel tightly clamp the cup handle, there must be a suitable mechanism to generate the driving force to reset it. Because the effective working stroke of the eccentric wheel is set to be about 90°, Therefore, the torsion spring not less than 90° can be selected;

S4. Design the alignment structure to ensure that the eccentric wheel rotates synchronously with a certain precision;

S5, select the friction material to form an elastic friction layer;

S6. The preset angle setting ensures that the cup handle smoothly enters between the two eccentric wheels;

S7, designing an unlocking device and unlocking;

S8. Carry out force analysis and calculation and physical manufacturing inspection to complete the design.

The surface of the eccentric shaft 15 is provided with a return torsion spring 18, and one end of the return torsion spring 18 is fixedly connected to the surface of the fixed frame 14, and the two ends of the eccentric wheel 16 are fixedly connected with a synchronous permanent magnet 19, and the synchronous permanent magnet 19 has four , and the polarity of the adjacent position is opposite, one end surface of the eccentric wheel 16 is provided with a fixed block 2, and the surface of the fixed block 2 is fixedly connected with a traction steel wire 21. By connecting the reset torsion spring and the synchronous permanent magnet, combined with the traction steel wire, it can be twisted It can be clamped by automatic reset, and at the same time, it is convenient to pull and separate for unlocking, so as to ensure the stability of synchronization.

Example 2

Please refer to Fig. 1 and Fig. 3, a kind of anti-pollution drainage device and its design method based on double eccentric wheel, comprise bottom support 1, the two ends of bottom support 1 are provided with mounting base 11, one side of mounting base 11 is installed Positioning device 12, one end of the bottom bracket 1 is provided with an unlocking device 13, 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, and the two ends of the eccentric wheel 16 are provided with an eccentric shaft 15. The eccentric shaft 15 is rotatably installed on both ends of the fixed frame 14, and the two ends of the fixed frame 14 are provided with mounting blocks 17, and the mounting blocks 17 are mounted on the surface of the mounting base 11 by screws;

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, and the unlocking push rod 24 is slidably connected to the side of the installation cylinder 23. By installing the unlocking push rod, it is convenient to push and adjust, and to facilitate unlocking Control, one end of the unlock push rod 24 is provided with a draw bar 25, one end of the draw bar 25 is fixedly connected to one end of the draw wire 21, the other end of the unlock push rod 24 is provided with an unlock button 26, and the unlock button 26 is located at one end of the bottom bracket 1 The side position, by installing the unlock button and the drawbar, can be manually pushed to unlock, which is convenient for adjustment and convenient for operation and use. One end of the bottom bracket 1 is provided with a guide groove 28, and the guide groove 28 is sleeved on the two ends of the drawbar 25. The bottom One end of the bracket 1 and the drawbar 25 is provided with a limit magnet 27, and the limit magnet 27 is a permanent magnet structure with opposite polarities.

When in use, the cup handle of the mug can be inserted between the two eccentric wheels 16, so that the frictional rotation can be carried out through the elastic friction layer 22. After the eccentric wheel 16 rotates around the eccentric shaft 15, a gap is formed, thereby positioning the cup handle, combined with reset The clamping and positioning of the torsion spring 18 can ensure that the mug is tilted upside down to improve the draining effect, and at the same time avoid dust accumulation and pollution of the cup mouth, which is safe and efficient. If it needs to be unlocked, the unlock button 26 can be pushed, and the unlocking push rod 24 can be used to drive the traction rod 25 to pull The traction steel wire 21 can pull the eccentric wheel 16 to continue to rotate so as to expand the gap in the middle, which is beneficial to take out the mug and is convenient for operation and use.

Example 3

Please refer to Figure 4 and Figure 5, the minimum spacing d _min = 3mm and the maximum spacing d _max = 25mm are required regardless of the thickness of the high friction layer, that is, the width of the compatible mug handle is 5-23mm, which basically covers the current market. Some common handle cups (if you need a larger range, you can modify the parameters according to the actual situation and the following calculation method). In addition, let the distance between the axes of the two eccentric wheels be d _ax , the eccentric distance be e, the radius of the eccentric wheel circle be r, the maximum radial direction r _max and the minimum radial direction r _min . Here are a few parameters that must be met:

r _max + r _min = 2·r (1)

d _ax -2·r _min ≥ d _max (2)

0≤d _ax -2·r _max ≤d _min (3)

In the prototype take:

_rmin ≥5mm (4)

If the effective working stroke is about 180°, then from formula (2) and formula (4), the conditions that the wheelbase d _ax needs to meet are:

d _ax ≥35mm (5)

In order 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 turns to the appropriate position is as small as possible, and the effective working stroke can be about 90°, then the formula (2) can be modified as:

d _ax -2·r≥d _max (6)

Because it is necessary to save as much effort as possible when the handle is pushed into the middle of the two eccentric wheels, the eccentric wheel is designed as a labor-saving lever, that is, the larger the ratio of r _max to the resilient arm, or the larger the eccentricity e, the opposite (the same springback torque) the more labor-saving. But at the same time, the diameter of the eccentric wheel cannot be too large, resulting in an increase in the volume of the device, so take:

r≈3·r _min (7)

From formulas (6), (7) and (4), the conditions that the wheelbase d _ax needs to meet are:

_dax≥55mm (8)

Because high-friction materials with a thickness of about 1 mm need to be mounted on the outer sides of the two eccentric wheels, the prototype uses:

d _ax =57mm (9)

Combined with the above formula, we can get:

r=16mm (10)

e=11mm (11)

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

Example 4

Please refer to Figure 6 and Figure 7. After the high-friction material is mounted, the cup handle cannot enter the middle of the two wheels smoothly due to the high friction force between the contact part of the cup handle and the eccentric wheel. This is because if the initial relative position of the eccentric wheel is at the maximum radial position, then the two points (points A and B in the figure) that have just come into contact with the eccentric wheel on the outer edge of the cup handle with a certain width, when pushed inward, the distance will decrease. Decrease first (i.e. |A'B'|<|AB|), and then increase, but due to the high friction, the eccentric wheel and the cup handle cannot slide relative to each other, and the cup handle generally cannot be squeezed and deformed. Therefore, it causes blockage or even jamming.

In order to allow the cup handle to enter between the two wheels smoothly when it is pushed in, it is required that the distance between the corresponding points on the two eccentric wheels will not first become smaller and then larger; or the magnitude of the reduction can be achieved through the deformation of the outer material offset; or the torsional moment generated by the thrust is greater than the frictional moment generated by the pressure component, so that a slip occurs between the eccentric wheel and the cup handle, and the eccentric wheel is pushed to a proper position.

According to the above calculation, as shown in the figure below, the thrust F acting on point C can be decomposed into: the torsional force U and the normal pressure N of the arc CC′ of the motion trajectory of point C in the tangential direction of point C. If the torsional force is greater than the frictional force, which is:

U＞μ N (12)

Where μ is the coefficient of friction between the handle and the surface of the eccentric wheel, then there will be a slip between the eccentric wheel and the handle, and the eccentric wheel will be pushed to a suitable position with the handle, and combined with the moderate deformation of the surface material, the handle will be smooth Enter between the two eccentrics.

The exact value (or available range) of the pre-deflection angle θ can be calculated according to the design requirements: The maximum compatible width of the cup handle is 25mm (this is the case without the thickness of the friction layer, if the thickness of the friction layer is added, it is about 23mm ), take half of it for calculation, that is, 12.5mm, because the designed wheelbase of the eccentric wheel is 57mm, so assuming that the outer ridgeline of the cup handle is at right angles, then the contact with the cross-section of the eccentric wheel is point P 16mm away from the y-axis in Figure 5 .

The eccentric wheel equation is changed from the original one with O' as the center:

(x-11) ² +y ² =256 (13)

The deflection around point O is centered on O′:

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

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

Where x _P = 16mm, substituting into formula (14) can get the relationship between y _P and θ:

Substitute this formula into formula (15) to get the relationship between α′ and θ:

From this, the lengths of the line segments OP and OP' can be obtained:

Substitute formula (17) into formula (18), and according to the aforementioned design, the surface material can be deformed by about 1mm, so record |OP| as 17mm, namely:

It can be solved to get θ≈0.8017054384030641 (radian, about 45.9°) and another solution

θ≈1.491107798000356 (radian, about 85.4°), but because the latter solution is close to 90°, which does not meet the design requirements, the former solution is taken. This is the required pre-deflection angle completely dependent on the deformation of the surface material. If you consider the situation that the cup handle and the eccentric wheel slide when a certain angle is reached, and the actual thickness of the friction layer, the outer edge of the cup handle is smoother and other factors, the distance between the axis and the contact point |OP| will be a little larger, and the length can be increased by 1~2mm, that is, when it is 19mm, the solution is

θ≈0.4299418243198151 (radian, about 24.6°), in order to maintain a certain margin in the prototype, a compromise integer value of 32° is taken, so the central axis of the magnet is parallel to the x-axis through O′.

The above description is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention and its improved concept to make equivalent replacements or changes shall fall within the scope of protection of the present invention.

Claims (9)

1. An anti-pollution draining device based on double eccentric wheels, comprising a bottom bracket (1), characterized in that: the two ends of the bottom bracket (1) are provided with mounts (11), and the mounts (11 ) is equipped with a positioning device (12), one end of the bottom bracket (1) is provided with an unlocking device (13), and 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), the two ends of the eccentric wheel (16) are provided with an eccentric shaft (15), and the eccentric shaft (15) is rotatably mounted on the fixed frame (14 ), the two 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 base (11) by screws; The design method of this drainage device comprises the steps: S1. According to the requirements, select the type of fixed structure, fix it by clamping on both sides, and adopt the double eccentric wheel clamping structure; S2. Design the clamping structure parameters, requiring the minimum spacing and maximum spacing regardless of the thickness of the high friction layer, that is, the width of the compatible mug handle is , which basically covers most of the common handle mugs currently on the market; S3. Design the reset and synchronous driving mode. In order to make the eccentric wheel tightly clamp the cup handle, there must be a suitable mechanism to generate the driving force to reset it. Because the effective working stroke of the eccentric wheel is set to be about 90°, Therefore, the torsion spring not less than 90° can be selected; S4. Design the alignment structure to ensure that the eccentric wheel rotates synchronously with a certain precision; S5, select the friction material to form an elastic friction layer; S6. The preset angle setting ensures that the cup handle smoothly enters between the two eccentric wheels; S7, designing an unlocking device and unlocking; S8. Carry out force analysis and calculation and physical manufacturing inspection to complete the design. 2. A kind of anti-pollution draining device based on double eccentric wheels according to claim 1, characterized in that: the surface of the eccentric shaft (15) is provided with a return torsion spring (18), and the return torsion spring (18) ) is fixedly connected to the surface of the fixed frame (14). 3. A kind of anti-pollution draining device based on double eccentrics according to claim 1, characterized in that: both ends of the eccentrics (16) are fixedly connected with synchronous permanent magnets (19), and the synchronous There are four permanent magnets (19), and the polarities of adjacent positions are opposite. 4. A kind of anti-pollution draining device based on double eccentric wheels according to claim 1, characterized in that: one end surface of the eccentric wheel (16) is provided with a fixed block (2), and the fixed block (2) The surface is fixedly connected with traction steel wire (21). 5. The anti-pollution draining device based on double eccentric wheels according to claim 1, characterized in that: the unlocking device (13) includes an installation cylinder (23) and an unlocking push rod (24), and the installation cylinder (23) is fixedly connected to the surface of the bottom bracket (1), and the unlocking push rod (24) is slidably connected to the side of the mounting cylinder (23). 6. The anti-pollution draining device based on double eccentric wheels according to claim 5, characterized in that: one end of the unlocking push rod (24) is provided with a draw bar (25), and the draw bar (25) One end of is fixedly connected to an end of traction steel wire (21). 7. A kind of anti-pollution 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), and the unlocking button (26 ) is located on the side of one end of the bottom bracket (1). 8. The anti-pollution draining device based on double eccentric wheels according to claim 1, characterized in that: one end of the bottom bracket (1) is provided with a guide groove (28), and the guide groove (28) covers Be connected to the two ends surfaces of the drawbar (25). 9. A kind of anti-pollution draining device based on double eccentric wheels according to claim 1, characterized in that: one end of the bottom bracket (1) and the drawbar (25) is provided with a limit magnet (27), so The position-limiting magnet (27) is a permanent magnet structure with opposite polarities.

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