Ventilation cabinet automatic door motor clutch structure

Abstract

The utility model discloses a ventilation cabinet automatic door motor clutch structure, which comprises a driving motor, a mounting seat, a magnetic platform, a magnetic sphere, a driving shaft and a power output piece, achieves the function of a clutch by adopting a mechanical structure, and has the advantages of long service life and stability in use.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structures, and particularly relates to a motor clutch structure for an automatic door of a fume hood. Background Art

[0002] For energy conservation, variable air volume systems and automatic window systems are generally installed in the fume hoods of biochemical laboratories. The variable air volume system adjusts the exhaust air volume of the fume hood according to the change of window height, so that the face velocity of the fume hood is stabilized at a constant safety value; the automatic window system is that after the user leaves for a certain period of time, the window of the fume hood automatically drops to a specified position through the drive of the motor, reducing the exhaust air volume. The effects of the two systems in terms of energy conservation are very remarkable.

[0003] However, due to the diverse structures of fume hoods on the market, the adaptation and installation of automatic windows are restricted in various ways. Among them, the motor problem severely restricts the popularization of the automatic window system.

[0004] The current disadvantages of motors using clutches are as follows:

[0005] 1. Electromagnetic clutch: The electromagnetic clutch needs to separately occupy a point on the controller, and has high requirements for the controller.

[0006] 2. Without clutch: In the case without a clutch, the fume hood can only rely on the motor to move the window, which cannot meet the emergency situation or other situations where the window needs to be quickly opened or closed, has high danger, and is extremely inconvenient to use. Content of the Utility Model

[0007] Aiming at the above technical problems existing in the existing motors using clutches, the purpose of the utility model is to provide a motor clutch structure for an automatic door of a fume hood, which achieves the function of a clutch by adopting a mechanical structure, and has the advantages of long service life and stable use.

[0008] To achieve the above purpose, the motor clutch structure for an automatic door of a fume hood provided by the utility model includes a driving motor, a mounting seat, a magnetic platform, a magnetic sphere, a driving shaft, and a power output member;

[0009] The mounting base passes through the drive shaft of the drive motor and is fixed to the housing of the drive motor. The magnetic platform is annular and its bottom is fixed to the mounting base and surrounds the outside of the drive shaft. The power output member includes a first connecting portion and a second connecting portion in the shape of a cover. The open end of the first connecting portion is rotatably connected to the mounting base and the cover wall surrounds the magnetic platform. The second connecting portion is connected to the outer side of the cover bottom of the first connecting portion and is used to connect to the controlled member. The driving shaft includes a transmission connecting portion and a motor connecting portion. The transmission connecting portion is rotatably located between the top of the magnetic platform and the inner side of the cover bottom of the first connecting portion. The motor connecting portion passes through the annular hole of the magnetic platform and is fixedly connected to the drive shaft of the drive motor;

[0010] The transmission connecting portion is elliptical and forms a cavity for placing magnetic spheres between it and the cover wall of the first connecting portion. The magnetic spheres are arranged on the magnetic platform and are located in the cavity. The inner wall of the cover wall of the first connecting portion is provided with a clamping groove;

[0011] Driven by the drive motor, the motor connecting portion can be driven to rotate. The transmission connecting portion follows the rotation of the motor connecting portion and can push the magnetic spheres to move and be stuck into the clamping groove. When the magnetic spheres are stressed, being stuck into the clamping groove can prevent the transmission connecting portion from continuing to rotate, so that the driving shaft and the power output member rotate synchronously;

[0012] When the magnetic spheres are not stressed, they can move towards the magnetic platform and disengage from the clamping groove through the magnetic force cooperation with the magnetic platform.

[0013] Further, a through hole is provided in the middle of the mounting base. The mounting base is sleeved on the drive shaft through the through hole, and the bottom of the mounting base is connected to the housing of the drive motor;

[0014] A first annular placement groove for placing the magnetic platform is provided along the outer edge of the through hole at the top of the mounting base. A second annular placement groove concentric with the first annular placement groove is provided outside the first annular placement groove at the top of the mounting base for placing the power output member.

[0015] Further, a connecting hole is provided on the side wall of the motor connecting portion. The motor connecting portion is sleeved on the drive shaft of the drive motor, and the relative position of the drive shaft of the drive motor to be driven is fixed by a set screw passing through the connecting hole.

[0016] Further, the length of the major axis of the ellipse of the transmission connecting portion is smaller than the diameter of the magnetic spheres with respect to the gap with the cover wall of the first connecting portion.

[0017] Further, a third annular groove is provided at the top of the transmission connecting portion, and an annular convex block corresponding to the third annular groove is provided on the inner wall of the cover top of the first connecting portion.

[0018] Furthermore, the slot is an arc-shaped slot, and when the magnetic sphere is inserted into the slot, a part of it is in the slot, and the other part is located on the magnetic platform and blocks the movement of the transmission connection part.

[0019] Furthermore, the fume hood automatic door motor clutch structure also includes a limit plate, the bottom of the limit plate is provided with a limit groove adapted to the first connecting part, the top of the limit plate is provided with an opening adapted to the second connecting part, the bottom of the limit plate is fixed on the magnetic platform, the limit groove is sleeved on the first connecting part to limit it, and the second connecting part passes through the opening.

[0020] The fume hood automatic door motor clutch structure provided by the utility model achieves the function of the clutch by adopting a mechanical structure, does not need to occupy the point position of the controller, and has the beneficial effects of long service life and stable use;

[0021] And when an emergency or other situation that requires quick opening and closing of the window occurs, the magnetic sphere can move to the magnetic platform and disengage from the slot due to the action of the magnetic force without being subjected to force, so the worker can directly move the controlled part, and the power output part can rotate freely without being blocked by the resistance of the drive motor when it is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0023] Figure 1 This is a schematic diagram of the overall structure of the fume hood automatic door motor clutch structure provided by the utility model;

[0024] Figure 2 A schematic diagram of the structure of the driving shaft in the clutch structure of the automatic door motor of the fume hood provided by the utility model;

[0025] Figure 3 for Figure 2 Cross-sectional view in CC direction;

[0026] Figure 4 A schematic diagram of the structure of the power output member in the fume hood automatic door motor clutch structure provided by the utility model;

[0027] Figure 5 for Figure 4 Cross-sectional view in the BB direction;

[0028] Figure 6 A schematic diagram of the structure of a mounting seat in the clutch structure of the automatic door motor of a fume hood provided by the utility model;

[0029] Figure 7 This is a schematic diagram of the installation of the limit plate in the clutch structure of the automatic door motor of the fume hood provided by the utility model.

[0030] Illustration:

[0031] Drive motor 100, mounting seat 200, magnetic platform 300, magnetic sphere 400, driving shaft 500, power output member 600, limiting plate 700;

[0032] Drive shaft 110, through hole 210, first annular placement groove 220, second annular placement groove 230, transmission connection portion 510, third annular groove 511, motor connection portion 520, first connection portion 610, card slot 611, annular protrusion 612, second connection portion 620. Detailed implementation mode

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific illustrations.

[0034] See Figure 1 , which shows a structural schematic diagram of the motor clutch structure of the automatic door of the fume hood provided by the present utility model.

[0035] It can be seen from the illustration that the motor clutch structure of the automatic door of the fume hood provided by the present utility model includes six components: a drive motor 100, a mounting seat 200, a magnetic platform 300, a magnetic sphere 400, a driving shaft 500, and a power output member 600.

[0036] Among them, the mounting seat 200 is the main structure and is used to carry other components.

[0037] The mounting seat 200 passes through the drive shaft 110 of the drive motor 100 and is fixed to the housing of the drive motor 100.

[0038] The magnetic platform 300 is annular and its bottom is fixed on the mounting seat 200 and surrounds the outside of the drive shaft 110.

[0039] The power output member 600 includes a first connection portion 610 and a second connection portion 620 in the shape of a cover. The open end of the first connection portion 610 is rotatably connected to the mounting seat 200 and the cover wall surrounds the outer circumference of the magnetic platform 300. The second connection portion 620 is connected to the outer side of the cover bottom of the first connection portion 610 and is used to connect to the controlled member.

[0040] The driving shaft 500 includes a transmission connection portion 510 and a motor connection portion 520. The transmission connection portion 510 is rotatably located between the top of the magnetic platform 300 and the inner side of the cover bottom of the first connection portion 610. The motor connection portion 520 is arranged between the annular hole of the magnetic platform 300 and the drive shaft 110 of the drive motor 100 and is fixedly connected to the drive shaft 110.

[0041] The transmission connection part 510 is oval and forms a cavity between the cover wall of the first connection part 610 for placing the magnetic sphere 400. The magnetic sphere 400 is arranged on the magnetic platform 300 and located in the cavity. A clamping groove 611 is provided on the inner wall of the cover wall of the first connection part 610;

[0042] Driven by the driving motor 100, the motor connection part 520 can be driven to rotate. The transmission connection part 510 follows the rotation of the motor connection part 520 to push the magnetic sphere 400 to move and snap into the clamping groove 611. The magnetic sphere 400 is stressed and snaps into the clamping groove 611 to block the continuous rotation of the transmission connection part 510, so that the driving shaft 500 and the power output part 600 rotate synchronously;

[0043] When the magnetic sphere 400 is not stressed, through the magnetic force cooperation with the magnetic platform 300, the magnetic sphere 400 can move towards the magnetic platform 300 and disengage from the clamping groove 611.

[0044] Compared with the prior art, this solution achieves the function of a clutch by adopting a mechanical structure, does not need to occupy the points of the controller, and has beneficial effects such as long service life and stable use;

[0045] And when an emergency occurs or other situations where the window needs to be quickly opened or closed, the magnetic sphere 400 can move onto the magnetic platform 300 and disengage from the clamping groove 611 due to the magnetic force when not stressed. Therefore, the worker can directly move the controlled part, and the power output part 600 can rotate freely without being blocked by the resistance in the power-off state of the driving motor 100.

[0046] Furthermore, as Figure 6 , a through hole 210 is provided in the middle of the mounting seat 200. The mounting seat 200 is sleeved on the driving shaft 110 through the through hole 210, and the bottom of the mounting seat 200 is connected to the housing of the driving motor 100.

[0047] In this embodiment, the bottom of the mounting seat 200 is preferably fixed to the housing of the driving motor 100 by studs.

[0048] At the top of the mounting seat 200, a first annular placement groove 220 for placing the magnetic platform 300 is provided along the outer edge of the through hole 210. At the top of the mounting seat 200, outside the first annular placement groove 220, a second annular placement groove 230 concentric with the first annular placement groove 220 is provided for placing the power output part 600.

[0049] The above through hole 210, the first annular placement groove 220 and the second annular placement groove 230 are coaxially arranged.

[0050] The mounting base 200 with such a structure is respectively connected to the magnetic platform 300 and the power output member 600 in a mating manner. The open end of the first connecting portion 610 of the power output member 600 is adapted to the second annular placement groove 230, and the first connecting portion 610 is rotatably placed in the second annular placement groove 230.

[0051] This solution does not limit the rotatable connection between the open end of the first connecting portion 610 and the second annular placement groove 230, which can be determined according to actual needs. For example, a bearing assembly can be used to achieve the rotational connection.

[0052] The magnetic platform 300 is fixed in the first annular placement groove 220. The magnetic platform 300 can have a side wall with a notch, and the groove wall of the first annular placement groove 220 is provided with a convex block. The circumferential fixation of the magnetic platform 300 to the first annular placement groove 220 is achieved by the engagement of the convex block with the notch. Moreover, the transmission connection portion 510 of the driving shaft 500 is located above the magnetic platform 300 and can limit the vertical movement of the magnetic platform 300.

[0053] Furthermore, as Figure 3 , a connection hole 530 is provided on the side wall of the motor connection portion 520. The motor connection portion 520 is sleeved on the driving shaft of the driving motor 100, and the relative position of the driving shaft 110 of the driving motor 100 is fixed by a set screw passing through the connection hole 530.

[0054] The driving shaft 500 with such a structure and the magnetic platform 300 adopt a clearance fit.

[0055] Furthermore, the length of the major axis of the ellipse of the transmission connection portion 510 and the clearance between the cover wall of the first connecting portion 610 are smaller than the diameter of the magnetic sphere 400, so as to avoid the situation that the magnetic sphere 400 cannot be touched when the transmission connection portion 510 rotates.

[0056] As Figure 3 , Figure 5 , a third annular groove 511 is provided at the top of the transmission connection portion 510, and an annular convex block 612 corresponding to the third annular groove 511 is provided on the inner wall of the cover top of the first connecting portion 610. The bottom end face of the annular convex block 612 contacts the bottom end face of the third annular groove 511, and the side wall of the annular convex block 612 and the side wall of the third annular groove 511 are in clearance fit, so as to limit the vertical movement of the transmission connection portion 510.

[0057] This solution does not limit the specific composition of the magnetic sphere 400 and the magnetic platform 300, which can be determined according to actual needs. Only materials capable of magnetic cooperation need to be used. For example, in this example, the magnetic sphere 400 is preferably a magnetic steel ball, and the magnetic platform 300 is preferably an iron platform.

[0058] The card slot 611 in this solution is an arc-shaped slot. When the magnetic sphere 400 is pushed into the card slot 611, a part of it is in the card slot 611, and the other part is located on the magnetic platform 300 and blocks the movement of the transmission connection part 510. When the magnetic sphere 400 is not under force, the part located on the magnetic platform 300 and the magnetic platform 300 act magnetically, causing the part of the magnetic sphere 400 in the card slot 611 to move towards the platform 300 and break out of the card slot 611. In this way, the locking between the driving shaft 500 and the power output member 600 is released, and the power output member 600 can rotate freely.

[0059] Further, as Figure 7 , in order to improve the reliability of the power output member 600, this solution also sets a limit plate 700 to limit the power output member 600. The bottom of the limit plate 700 is provided with a limit slot adapted to the first connection part 610, and the top of the limit plate 700 is provided with an opening adapted to the second connection part 620. The bottom of the limit plate 700 is fixed on the magnetic platform 300. The limit slot is sleeved on the first connection part 610 to limit it, and the second connection part 620 passes through the opening.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A fume hood automatic door motor clutch structure, characterized in that: Including driving motor, mounting seat, magnetic platform, magnetic sphere, driving shaft, power output part; The mounting seat passes through the driving shaft of the driving motor and is fixed to the driving motor housing. The magnetic platform is annularly fixed on the mounting seat and surrounds the outside of the driving shaft. The power output member includes a first connection part and a second connection part in the shape of a cover. The open end of the first connection part is rotatably connected to the mounting seat and the cover wall surrounds the magnetic platform. The second connection part is connected to the outside of the cover bottom of the first connection part for connecting to the controlled part. The driving shaft includes a transmission connection part and a motor connection part. The transmission connection part is rotatably located between the top of the magnetic platform and the inner side of the cover bottom of the first connection part. The motor connection part is arranged between the annular hole of the magnetic platform and the driving shaft of the driving motor and is fixedly connected to the driving shaft. The transmission connection part is elliptical and forms a cavity for accommodating a magnetic sphere with the cover wall of the first connection part. The magnetic sphere is arranged on a magnetic platform and located in the cavity. A slot is provided on the inner wall of the cover wall of the first connection part. The motor connection part can be driven to rotate by the driving motor, and the transmission connection part can drive the magnetic ball to move and be stuck in the slot by following the rotation of the motor connection part. When the magnetic ball is subjected to force, it can be stuck in the slot to prevent the transmission connection part from continuing to rotate, so that the driving shaft and the power output part rotate synchronously; When the magnetic sphere is not subjected to force, it can move toward the magnetic platform and escape from the card slot through the magnetic force cooperation with the magnetic platform.

2. The fume hood automatic door motor clutch structure according to claim 1 is characterized in that: A through hole is provided in the middle of the mounting seat, the mounting seat is sleeved on the driving shaft through the through hole, and the bottom of the mounting seat is connected to the housing of the driving motor; A first annular placement groove for accommodating the magnetic platform is provided at the top of the mounting seat along the outer edge of the through hole, and a second annular placement groove coaxial with the first annular placement groove is provided at the top of the mounting seat outside the first annular placement groove for accommodating the power output member.

3. The fume hood automatic door motor clutch structure according to claim 1 is characterized in that: A connecting hole is provided on the side wall of the motor connecting part. The motor connecting part is sleeved on the driving shaft of the driving motor. The driving shaft of the driving motor is fixed in relative position by passing a top screw through the connecting hole.

4. The fume hood automatic door motor clutch structure according to claim 1, characterized in that: The gap between the major axis length of the elliptical transmission connection part and the cover wall of the first connection part is smaller than the diameter of the magnetic sphere.

5. The fume hood automatic door motor clutch structure according to claim 1, characterized in that: A third annular groove is provided on the top of the transmission connection part, and an annular protrusion corresponding to the third annular groove is provided on the inner wall of the top cover of the first connection part.

6. The fume hood automatic door motor clutch structure according to claim 1, characterized in that: The slot is an arc-shaped slot. When the magnetic sphere is inserted into the slot, a part of the sphere is in the slot and the other part is located on the magnetic platform and blocks the movement of the transmission connection part.

7. The fume hood automatic door motor clutch structure according to claim 1, characterized in that: The fume hood automatic door motor clutch structure also includes a limit plate, a limit groove matched with the first connecting part is provided at the bottom of the limit plate, an opening matched with the second connecting part is provided at the top of the limit plate, the bottom of the limit plate is fixed on the magnetic platform, the limit groove is sleeved on the first connecting part to limit it, and the second connecting part passes through the opening.

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