Electromagnetic retainer capable of being manually controlled and control method

Abstract

The invention relates to a manually controllable electromagnetic retainer and a control method, and belongs to the field of electromagnetic retainers, and the manually controllable electromagnetic retainer comprises an electromagnetic retainer body, a hinge assembly and an operating lever assembly. An input operating shaft is arranged at one end of a movable iron core in the electromagnetic retainer body, an output shaft is arranged at the other end of the movable iron core, the input operating shaft penetrates out of a rear end cover of the electromagnetic retainer body, and the output shaft penetrates out of a front end cover of the electromagnetic retainer body. The hinge assembly is installed on the rear end cover, and the input operating shaft penetrates out of a support of the hinge assembly. The operating rod assembly is installed on a connecting rod of the hinge assembly, and the output end of the operating rod assembly is hinged to the end, penetrating out of the support, of the input operating shaft. The input operating shaft is driven to move axially through the operating rod assembly, so that the movable iron core is driven to move axially, the output shaft is driven to stretch out and draw back, and the problem that the on-off state of an existing electromagnetic retainer cannot be changed manually is solved.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic holders, and particularly to a manually controllable electromagnetic holder and a control method therefor. Background Art

[0002] An electromagnetic holder is an automatic switch that realizes the conversion of its on / off state by inputting positive / negative DC pulse voltage to its control coil. After the state conversion, the coil of the electromagnetic holder does not need to be continuously energized, and the on / off state can be maintained by relying on the permanent magnet inside it.

[0003] The function of the existing electromagnetic holder is mainly realized by changing the internal control magnetic field through the control coil, thereby moving the internal moving iron core and driving the output shaft to act. This causes the following disadvantages of the electromagnetic holder. The realization of its function completely depends on the polarity conversion of the input voltage. When there is a problem with the power supply, the on / off state cannot be changed, and there are certain usage risks.

[0004] Therefore, it is necessary to provide a manually controllable electromagnetic holder to solve the above problems. Summary of the Invention

[0005] Technical Problems to be Solved In order to avoid the deficiencies of the prior art, the present invention provides a manually controllable electromagnetic holder and a control method therefor. An input operating shaft is installed at one end of the moving iron core of the electromagnetic holder body, and an output shaft is installed at the other end. The input operating shaft passes through the rear end cover of the electromagnetic holder body and is connected to the output end of the operating rod assembly provided on the rear end cover. The input operating shaft is axially moved by operating the operating rod assembly to drive the output shaft to act, so as to solve the problem that the existing electromagnetic holder cannot manually change the switch state.

[0006] The technical solution of the present invention is: a manually controllable electromagnetic holder, comprising: An electromagnetic holder body, an input operating shaft is provided at one end of the moving iron core inside the electromagnetic holder body, an output shaft is provided at the other end of the moving iron core, the input operating shaft passes through the rear end cover of the electromagnetic holder body, and the output shaft passes through the front end cover of the electromagnetic holder body; And an operating rod assembly, which is arranged on the rear end cover of the electromagnetic holder body through a hinge assembly. One end of the input operating shaft passing through the rear end cover is connected to the output end of the operating rod assembly. The operating rod assembly is used to control the axial movement of the input operating shaft along the electromagnetic holder body, thereby driving the output shaft to move.

[0007] A further technical solution of the present invention is: the hinge assembly includes: A bracket, the bracket includes a main body portion and a support portion located on one side of the main body portion; the main body portion is fixedly connected to the rear end cover, and a through hole for the input operating shaft to pass through is provided at the central position of the main body portion; and a connecting rod, one end of the connecting rod is hinged to the supporting part, and the other end is used for being hinged to the joystick assembly.

[0008] A further technical solution of the present invention is that: the joystick assembly includes: a joystick, one end of which is hinged to the end of the connecting rod far from the supporting part, and the middle part thereof is used as the output end of the joystick assembly and is hinged to the end of the input operating shaft passing through the bracket; and a handle, the handle is installed at the end of the joystick far from the connecting rod, and the handle is used as the input end of the joystick assembly for manually controlling the joystick.

[0009] A further technical solution of the present invention is that: the end of the input operating shaft passing through the bracket is provided with a first hinge hole perpendicular to its axis, and the middle part of the joystick is provided with a second hinge hole corresponding to the hinge hole of the input operating shaft, and the first hinge hole and the second hinge hole are connected by a pin shaft to achieve hinging.

[0010] A further technical solution of the present invention is that: the electromagnetic retainer body further includes: a copper sleeve, coaxially sleeved outside the moving iron core, one end of which is fixedly connected to the inner boss of the front end cover, the other end is fixedly connected to the inner boss of the rear end cover, and the inner wall of the copper sleeve is in sliding contact with the outer wall of the moving iron core; a magnetic steel, which is a permanent magnet, coaxially sleeved outside the copper sleeve, the inner wall of the magnetic steel is in contact with the outer wall of the copper sleeve, and both ends thereof are respectively in contact with the inner end surface of the front end cover and the inner end surface of the rear end cover; a skeleton, coaxially sleeved outside the magnetic steel, the inner wall of the skeleton is in contact with the outer wall of the magnetic steel, and both ends of the skeleton are respectively in contact with the inner end surface of the front end cover and the inner end surface of the rear end cover; a coil, wound on the outer wall surface of the skeleton, both ends of the coil are connected to an external power supply through wires for introducing a control voltage; and a housing, sleeved outside the coil, both ends of the housing are respectively fixedly connected to the front end cover and the rear end cover, and the three jointly form a protective housing of the electromagnetic retainer body.

[0011] A further technical solution of the present invention is that: both ends of the skeleton are provided with radially protruding limiting parts for limiting the position of the coil.

[0012] A further technical solution of the present invention is that: a through stepped hole is axially provided at the central position of the moving iron core, the input operating shaft is fixedly connected to the stepped hole facing the rear end cover, and the output shaft is fixedly connected to the stepped hole facing the front end cover.

[0013] A control method for a manually controllable electromagnetic retainer, using the manually controllable electromagnetic retainer, the method includes: Electric control method: Connect the outer end of the output shaft of the electromagnetic retainer body to the electronic device that needs to maintain the switch state. Apply a positive control voltage to the coil to make the output shaft extend. After the coil is powered off, the state of the output shaft is maintained, and the electromagnetic retainer is in the open state. Apply a reverse control voltage to the coil to make the output shaft retract. After the coil is powered off, the state of the output shaft is maintained, and the electromagnetic retainer is in the closed state. And the manual control method: When the electromagnetic retainer is in the open state, lift the joystick clockwise to make the position of the moving iron core close to the rear end cover, and the output shaft retracts to achieve closing. When the electromagnetic retainer is in the closed state, press the joystick counterclockwise to make the position of the moving iron core close to the front end cover, and the output shaft extends to achieve opening.

[0014] The beneficial effects of the present invention are as follows: An electromagnetic retainer capable of manual control and its control method according to the present invention. By providing an input operating shaft on the moving iron core of the electromagnetic retainer body, coaxially installing the input operating shaft and the output shaft at both ends of the moving iron core, and fixedly connecting the rear end cover and the bracket of the electromagnetic retainer body, the input operating shaft passes through the rear end cover and the bracket of the hinge assembly. One end of the connecting rod of the hinge assembly is hinged to the joystick assembly for manually controlling the axial movement of the input operating shaft, thereby driving the moving iron core to axially move in the copper sleeve, realizing the axial expansion and contraction of the output shaft, and thus manually realizing the conversion of the open and closed states, solving the problem that the existing electromagnetic retainer cannot realize the conversion of the manual switch state.

[0015] The electromagnetic retainer capable of manual control of the present invention is a dual-control electromagnetic retainer, that is, it can be electrically controlled and also manually controlled, making the control method of the electromagnetic retainer more diverse, improving the operability, and being more suitable for the use scenarios of the electromagnetic retainer. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of an electromagnetic retainer capable of manual control according to the present invention; Figure 2 It is a schematic diagram of the structure of the electromagnetic retainer body in the present invention; Figure 3 It is a structural diagram of the joystick in the present invention.

[0018] In the figure: 1. Electromagnetic retainer body, 11. Moving iron core, 12. Input control shaft, 121. First hinge hole, 13. Output shaft, 14. Rear end cover, 15. Front end cover, 16. Copper bushing, 17. Magnet, 18. Skeleton, 19. Coil, 20. Outer shell, 2. Bracket, 21. Main body part, 22. Support part; 3. Bolt, 4. Connecting rod, 5. Control lever, 51. Second hinge hole, 6. Handle, 7. Pin shaft, 8. Wire. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] An embodiment of a manually controllable electromagnetic retainer of the present invention is as Figure 1 shown, and includes: an electromagnetic retainer body 1, a hinge assembly, and a control lever assembly.

[0021] As Figure 2 shown, the electromagnetic retainer body 1 includes an external housing and an electromagnetic assembly installed in the external housing. The external housing includes a rear end cover 14, a front end cover 15, and a cylindrical outer shell 20 fixedly connecting the two end covers. The electromagnetic assembly includes a moving iron core 11, an input control shaft 12, an output shaft 13, a copper bushing 16, a magnet 17, a skeleton 18, and a coil 19.

[0022] Specifically, the moving iron core 11 is located inside the outer housing. A through stepped hole is provided axially at the center position of the moving iron core 11. The input control shaft 12 is fixedly connected to the stepped hole at the end facing the rear end cover 14, and the output shaft 13 is fixedly connected to the stepped hole at the end facing the front end cover 15. The input control shaft 12 passes through the rear end cover 14, and the output shaft 13 passes through the front end cover 15. The copper sleeve 16 is of a hollow cylindrical structure. The copper sleeve 16 is coaxially sleeved outside the moving iron core 11. One end of the copper sleeve 16 is fixedly connected to the boss on the inner side wall of the front end cover 15, and the other end is fixedly connected to the boss on the inner side wall of the rear end cover 14. The bosses on the inner side wall of the front end cover 15 and the inner side wall of the rear end cover 14 have the same diameter and are coaxial, respectively supporting the inner diameter walls at both ends of the copper sleeve 16. The inner wall of the copper sleeve 16 is in sliding contact with the outer wall of the moving iron core 11, reducing the frictional force when the moving iron core 11 slides through the copper sleeve 16 and achieving a lubricating effect. The magnet 17 is a permanent magnet of a hollow cylindrical structure. The magnet 17 is coaxially sleeved outside the copper sleeve 16. The inner wall of the magnet 17 is in contact with the outer wall of the copper sleeve 16, and both ends of the magnet 17 are in contact with the inner end faces of the front end cover 15 and the rear end cover 14 respectively. The skeleton 18 is of a hollow cylindrical structure. The skeleton 18 is coaxially sleeved outside the magnet 17. The inner wall of the skeleton 18 is in contact with the outer wall of the magnet 17, and both ends of the skeleton 18 are in contact with the inner end faces of the front end cover 15 and the rear end cover 14 respectively. Radially protruding limiting parts are provided on both sides of the outer wall of the skeleton 18 to form a limit for the coil 19 wound around the outer wall. The coil 19 is wound around the outer wall surface of the skeleton 18. Both ends of the coil 19 are connected to an external power supply through wires 8 for applying a control voltage. The housing 20 is sleeved outside the coil 19. Both ends of the housing 20 are fixedly connected to the front end cover 15 and the rear end cover 14 respectively. The housing 20, the front end cover 15 and the rear end cover 14 together form the external protective housing of the electromagnetic retainer body 1. When a control voltage is applied to the coil 19, a control magnetic field is formed inside the electromagnetic retainer body 1, driving the moving iron core 11 to move axially, that is, moving towards the front end cover 15 or the rear end cover 14 direction, thereby controlling the extension or retraction of the output shaft 13. After the moving iron core 11 moves in place, the power supply to the coil 19 is cut off. Under the action of the magnet 17, the position of the moving iron core 11 is maintained, that is, the extended or retracted state of the output shaft 13 is maintained, realizing the function of maintaining the on / off state of the electromagnetic retainer.

[0023] The hinge assembly in this embodiment specifically includes a bracket 2 and a connecting rod 4. The bracket 2 is fixedly connected to the rear end cover 14 of the electromagnetic retainer body 1, and a connecting rod 4 is hinged on one side of the bracket 2.

[0024] Specifically, the bracket 2 is installed on the rear end cover 14, and the input control shaft 12 passes through the bracket 2. The bracket 2 includes a main body portion 21 and a supporting portion 22 that protrudes outward on one side of the main body portion 21. The main body portion 21 of the bracket 2 is provided with 4 connecting holes that penetrate the main body portion 21 for correspondingly passing through 4 bolts 3 and being threadedly fixed to the rear end cover 14. Correspondingly, 4 threaded holes that match the connecting holes of the main body portion 21 are also provided on the rear end cover 14. A through hole for the input control shaft 12 to pass through is provided at the central position of the main body portion 21. One end of the supporting portion 22 is hinged to one end of the connecting rod 4 through a pin shaft, and the other end of the connecting rod 4 is hinged to the control rod assembly.

[0025] The control rod assembly is installed on the hinge assembly. The output end of the control rod assembly is hinged to the end of the input control shaft 12 passing through the bracket 2. The control rod assembly is used to control the axial movement of the input control shaft 12, and further control the movement of the output shaft 13.

[0026] Specifically, the control rod assembly includes a control rod 5 and a handle 6. One end of the control rod 5 is hinged to the end of the connecting rod 4 away from the supporting portion 22 through a pin shaft. A spherical handle 6 is fixedly installed at the other end of the control rod 5. The middle part of the control rod 5 and the end of the input control shaft 12 passing through the bracket 2 are hinged through a pin shaft 7. Further, a first hinge hole 121 is provided perpendicular to the axis at the end of the input control shaft 12 passing through the bracket 2. Correspondingly, a second hinge hole 51 corresponding to the hinge hole of the input control shaft is provided in the middle part of the control rod 5. The input control shaft 12 and the control rod 5 are hinged by connecting the first hinge hole 121 and the second hinge hole 51 through the pin shaft 7. The handle 6 is used to hold and control the lifting or pressing of the control rod 5, and further manually control the axial movement of the input control shaft 12 to realize the manual control of the axial movement of the moving iron core 11. The handle 6 serves as the input end of the control rod assembly, and the hinged part between the middle part of the control rod 5 and the input control shaft 12 serves as the output end of the control rod assembly.

[0027] As Figure 3 shown, the position of the second hinge hole 51 on the control rod 5 is determined according to the operating force on the control rod and the electromagnetic holding force of the electromagnetic holder body 1. When changing the output state of the electromagnetic holder body 1 through the control rod 5, in order to ensure the operability of the product, the operating force applied to the control rod 5 should be within a certain range. The structural parameters of the control rod can be determined by the following calculation method to ensure that the output state of the electromagnetic holder body 1 can be changed with an appropriate operating force.

[0028] F 操纵 = (F 保持 ·L 阻力 ) / L 动力 In the formula, F 操纵 is the operating force applied to the control rod; F 保持is the permanent magnet holding force of the electromagnetic holder body 1 in the output / retraction state; L 动力 is the distance from the position where the operating force is applied on the joystick to the hinge hole at the end of the joystick 5; L 阻力 is the distance from the position where the holding force is applied on the joystick (i.e., the position of the second hinge hole 51) to the hinge hole at the end of the joystick 5.

[0029] According to the actual use working conditions, F 操纵 is set within the range of (20 - 25) N, and the electromagnetic holding force F of the electromagnetic holder body 1 in the output / retraction state 保持 is about 65 N. Therefore, L 动力 and L 阻力 can be determined for the structural proportional relationship, and then the structural parameters of the joystick 5 suitable for operation can be determined, and the position of the second hinge hole 51 can be determined.

[0030] Specific control method: The electromagnetic holder that can be manually controlled in this embodiment can be electrically controlled and manually controlled.

[0031] During electric control: Connect the outer end of the output shaft 13 of the electromagnetic holder body 1 to the electronic device that needs to maintain the switch state, apply a positive control voltage to the coil 19 to form a positive control magnetic field, and the positive control magnetic field controls the moving iron core 11 to move towards the front end cover 15, so that the output shaft 13 extends to the required position; after the coil 19 is powered off, under the magnetic attraction of the magnetic steel 17 and the moving iron core 11, the position of the moving iron core 11 remains unchanged, so that the output shaft 13 maintains the extended position state, and the electromagnetic holder is in the open state, thus continuously maintaining the on state of the electronic device.

[0032] Similarly, apply a reverse control voltage to the coil 19 to form a reverse control magnetic field, and the reverse control magnetic field controls the moving iron core 11 to move towards the rear end cover 14, so that the output shaft 13 retracts; after the coil 19 is powered off, under the magnetic attraction of the magnetic steel 17 and the moving iron core 11, the position of the moving iron core 11 remains unchanged, and the output shaft 13 maintains the retracted state, and the electromagnetic holder is in the closed state, thus continuously maintaining the off state of the electronic device.

[0033] During manual control: When the electromagnetic holder is in the open state, lift the joystick 5 by holding the handle 6, and the joystick 5 rotates clockwise, thereby pulling the input operating shaft 12, moving the position of the moving iron core 11 and approaching the rear end cover 14, and the output shaft 13 retracts into the electromagnetic holder body 1, thus switching to the closed state. When the electromagnetic holder is in the closed state, press down the joystick 5 by holding the handle 6, and the joystick 5 rotates counterclockwise, thereby pushing the input operating shaft 12, moving the position of the moving iron core 11 and approaching the front end cover 15, and the output shaft 13 extends out of the electromagnetic holder body 1 to the corresponding position, thus switching to the open state.

[0034] A manually controllable electromagnetic retainer proposed in this embodiment has two control methods, namely electric control and manual control. It can solve the problem that the existing electromagnetic retainer completely depends on the polarity conversion of the input voltage and cannot change the on / off state when there is a power supply problem. Manual operation is simple and convenient, and it has a wide range of applications.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manually controllable electromagnetic retainer, characterized in that, Comprising: An electromagnetic retainer body, one end of a moving iron core inside the electromagnetic retainer body is provided with an input control shaft, the other end of the moving iron core is provided with an output shaft, the input control shaft penetrates through the rear end cover of the electromagnetic retainer body, and the output shaft penetrates through the front end cover of the electromagnetic retainer body; And a control lever assembly, which is arranged on the rear end cover of the electromagnetic retainer body through a hinge assembly, one end of the input control shaft penetrating through the rear end cover is connected to the output end of the control lever assembly, and the control lever assembly is used to control the input control shaft to move axially along the electromagnetic retainer body, so as to drive the output shaft to move.

2. The manually controllable electromagnetic retainer according to claim 1, wherein The hinge assembly includes: A bracket, the bracket includes a main body portion and a support portion located on one side of the main body portion; the main body portion is fixedly connected to the rear end cover, and a through hole for the input control shaft to penetrate through is provided at the central position of the main body portion; And a connecting rod, one end of the connecting rod is hinged to the support portion, and the other end is used for being hinged to the control lever assembly.

3. The manually controllable electromagnetic retainer according to claim 2, wherein, The control lever assembly includes: A control lever, one end of which is hinged to the end of the connecting rod away from the support portion, and the middle part thereof serves as the output end of the control lever assembly and is hinged to the end of the input control shaft penetrating through the bracket; And a handle, the handle is installed at the end of the control lever away from the connecting rod, and the handle serves as the input end of the control lever assembly for manually controlling the control lever.

4. The manually controllable electromagnetic retainer according to claim 3, characterized in that, The end of the input control shaft penetrating through the bracket is provided with a first hinge hole perpendicular to its axis, and the middle part of the control lever is provided with a second hinge hole corresponding to the hinge hole of the input control shaft, and the first hinge hole and the second hinge hole are connected by a pin shaft to achieve hinging.

5. The manually controllable electromagnetic retainer according to claim 3, characterized in that, The electromagnetic retainer body further includes: A copper sleeve, coaxially sleeved outside the moving iron core, one end of which is fixedly connected to the inner boss of the front end cover, the other end is fixedly connected to the inner boss of the rear end cover, and the inner wall of the copper sleeve is in sliding contact with the outer wall of the moving iron core; A magnetic steel, which is a permanent magnet, coaxially sleeved outside the copper sleeve, the inner wall of the magnetic steel is in contact with the outer wall of the copper sleeve, and its two ends are respectively in contact with the inner end face of the front end cover and the inner end face of the rear end cover; A skeleton, coaxially sleeved outside the magnetic steel, the inner wall of the skeleton is in contact with the outer wall of the magnetic steel, and both ends of the skeleton are respectively in contact with the inner end face of the front end cover and the inner end face of the rear end cover; A coil, wound on the outer wall surface of the skeleton, and both ends of the coil are connected to an external power supply through wires for applying a control voltage; And a housing, sleeved outside the coil, and both ends of the housing are respectively fixedly connected to the front end cover and the rear end cover, and the three together form a protective housing of the electromagnetic retainer body.

6. The manually controllable electromagnetic retainer according to claim 5, characterized in that, Both ends of the skeleton are provided with radially protruding limiting portions for limiting the position of the coil.

7. The manually controllable electromagnetic retainer according to claim 5, characterized in that, A through stepped hole is axially provided at the central position of the moving iron core, the input control shaft is fixedly connected to the stepped hole facing the rear end cover, and the output shaft is fixedly connected to the stepped hole facing the front end cover.

8. A control method for a manually controllable electromagnetic retainer, characterized in that, Using the manually controllable electromagnetic retainer according to claim 5, the method includes: Electric control method: Connect the outer end of the output shaft of the electromagnetic retainer body to an electronic device that needs to maintain the switch state, apply a positive control voltage to the coil to make the output shaft extend, and the state of the output shaft is maintained after the coil is powered off, and the electromagnetic retainer is in the open state; apply a negative control voltage to the coil to make the output shaft retract, and the state of the output shaft is maintained after the coil is powered off, and the electromagnetic retainer is in the closed state; And the manual control method: When the electromagnetic retainer is in the open state, lift the joystick clockwise to make the position of the moving iron core close to the rear end cover, and the output shaft retracts to achieve closing; when the electromagnetic retainer is in the closed state, press down the joystick counterclockwise to make the position of the moving iron core close to the front end cover, and the output shaft extends to achieve opening.

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