A three-position self-holding electromagnet device

Abstract

A three-position self-holding electromagnet device includes a moving iron core, a moving iron core support structure, and a TCU controller. An excitation coil is sleeved on the outside of the moving iron core, and a magnetic conductor is arranged between the excitation coil and the moving iron core. The left and right ends of the moving iron core are axially provided with output shafts respectively, and the output shafts are slidably arranged in the shaft hole of the moving iron core support structure. A sliding rod rigid connecting rod is arranged on the moving iron core or the output shaft, and the end of the sliding rod rigid connecting rod is smoothly arranged, and a clamping head is arranged at the position of the moving trajectory line of the end of the connecting rod, and a clamping groove is arranged at the bottom of the clamping head. The present invention defines the theoretical middle position of the left and right movement limit position of the moving iron core as the middle position of the moving iron core movement. When the moving iron core moves to the middle position, the clamping device will clamp the sliding rod to prevent the moving iron core from moving left and right. When the moving iron core needs to move left and right from the middle position, it is necessary to first release the clamping device on the sliding rod, and then energize the electromagnet to achieve the left and right displacement of the moving iron core.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnets, in particular to a three-position self-holding electromagnet device. Background Art

[0002] Existing self-holding electromagnets are of two types: one-way self-holding and two-way self-holding.

[0003] The working principle of the holding electromagnet is similar to that of all other linear motion electromagnets. When the coil is energized and excited, the slide bar will move toward the core due to the electromagnetic field and will eventually stop at the end point. When the power is cut off, the slide bar can still be held by the magnetic force of the permanent magnetic field, thus maintaining the original position. If the slide bar is to return, a reverse voltage or current must be applied. Therefore, this type of holding electromagnet can be made into two types of action: pull-in and push-out. Its holding mode is also divided into two types: bidirectional self-holding and unidirectional self-holding.

[0004] The bidirectional self-holding electromagnet adopts a double coil structure, which can hold (self-lock) the slide bar in two different positions, the initial and the final positions, and both positions have the same output torque (with bistable characteristics). The unidirectional self-holding only holds (self-locks) the iron core in one position at the end of the stroke.

[0005] The existing two-position self-holding electromagnet can only make the moving iron core self-hold (no power is supplied) at the above-mentioned left limit or right limit position. Theoretically, there is a stable intermediate position. At this time, the distance between the left and right air gaps is equal, the magnetic resistance of the left and right magnetic circuits is equal, the magnetic flux is also equal, and the moving iron core is subjected to the same suction force of the left and right limit position limit components in opposite directions. However, this is an unstable balance. As long as there is a slight error in the design (inevitable in mechanical processing) or a slight change in the air gap, the balance will be destroyed and return to the left or right limit position. Summary of the invention

[0006] The object of the present invention is to provide a three-position self-holding electromagnet device to solve the problems raised in the above background technology.

[0007] The technical solution adopted by the present invention is: a three-position self-holding electromagnet device, including a moving iron core, a moving iron core supporting structure, and a TCU controller, wherein an excitation coil is sleeved on the outside of the moving iron core, a magnetic conductor is arranged between the excitation coil and the moving iron core, an output shaft is axially arranged at the left and right ends of the moving iron core respectively, and the output shaft is slidably arranged in the axial hole of the moving iron core supporting structure, a sliding rod rigid connecting rod is arranged on the moving iron core or the output shaft, the end of the sliding rod rigid connecting rod is smoothly arranged, a clamping head is arranged at the position of the moving trajectory line of the end of the connecting rod, a clamping groove is arranged at the bottom of the clamping head, the clamping groove is movably connected to the clamping head, a clamping groove is arranged at the bottom of the clamping head, the clamping groove is movably connected to the clamping head, the clamping head is connected to the push rod of the positioning electromagnet or electric push rod or pneumatic push rod, a displacement sensor is arranged near the output shaft, and the electric drive terminals of the excitation coil, the displacement sensor, the positioning electromagnet or electric push rod or pneumatic push rod are all electrically connected to the TCU controller.

[0008] Preferably, the moving iron core supporting structure is a cylindrical shell, with axial holes provided at both ends of the cylindrical shell, the output shaft is slidably arranged in the axial holes, a sliding rod rigid connecting rod is provided on the input shaft, a permanent magnet is provided in the middle part of the cylindrical shell, a left excitation coil is sleeved on the left part of the permanent magnet, a right excitation coil is sleeved on the right part of the permanent magnet, a magnetic conductor is provided between the excitation coil and the moving iron core, and a porcelain sleeve is provided between the magnetic conductor and the cylindrical shell.

[0009] Preferably, the moving iron core support structure is formed by connecting a left fixed armature and a right fixed armature, the outer ends of the inner parts of the left fixed armature and the right fixed armature are provided with axial holes, the output shaft is slidably arranged in the axial hole, the left fixed armature and the right fixed armature are magnetic conductors, and the inner parts thereof are arranged between the excitation coil and the moving iron core, a sliding rod rigid connecting rod is provided on the moving iron core, and a sliding rod through hole is also provided between the left fixed armature and the right fixed armature, and the sliding rod rigid connecting rod is arranged through the sliding rod through hole.

[0010] Preferably, the sliding rod through hole is a waist hole.

[0011] Preferably, a ceramic sleeve is provided between the moving iron core and the sliding rod rigid connecting rod.

[0012] Preferably, a sliding bearing is also provided in the shaft hole.

[0013] Preferably, the positioning electromagnet includes a positioning electromagnet housing and a chuck, wherein a positioning electromagnet moving iron core is arranged in the positioning electromagnet housing, a positioning coil is arranged outside the positioning electromagnet moving iron core, a return spring is arranged on the top of the positioning electromagnet moving iron core, an output shaft of the positioning electromagnet moving iron core is connected to a chuck connecting rod, and the chuck connecting rod passes through an axial hole at the bottom of the positioning electromagnet housing and is connected to the chuck.

[0014] Preferably, the bottom end of the return spring abuts against the top end of the moving iron core of the positioning electromagnet.

[0015] The present invention defines the theoretical middle position of the left and right movement limit position of the moving iron core as the middle position of the moving iron core. When the moving iron core moves to the middle position, the locking device will lock the slide bar to prevent the moving iron core from moving left and right. When the moving iron core needs to move left and right from the middle position, it is necessary to first release the locking device on the slide bar, and then energize the electromagnet to achieve the left and right displacement of the moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : A schematic structural diagram of the present invention;

[0017] Figure 2 : A schematic diagram of another structure of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] A three-position self-holding electromagnet device includes a moving iron core 11, a moving iron core support structure 100, and a TCU controller 14. The moving iron core 11 is provided with an excitation coil 8 on its outer sleeve, and a magnetic conductor 16 is provided between the excitation coil 8 and the moving iron core 11. The left and right ends of the moving iron core 11 are axially provided with output shafts 122 and 12, respectively. The output shafts 122 and 12 are slidably provided in an axial hole 121 of the moving iron core support structure, and a sliding bearing 15 is also provided in the axial hole 121. A displacement sensor 13 is provided near the output shaft 12.

[0021] The moving iron core supporting structure is a barrel shell 7, and shaft holes 121 are provided at both ends of the barrel shell 7. The output shafts 122, 12 are slidably arranged in the shaft holes 121. A sliding rod rigid connecting rod 5 is provided on the input shaft. A permanent magnet 10 is provided in the middle part of the barrel shell 7. A left excitation coil 8 is sleeved on the left part of the permanent magnet 10, and a right excitation coil 9 is sleeved on the right part of the permanent magnet 10. A magnetic conductor 16 is provided between the excitation coil 8 and the moving iron core 11, and a porcelain sleeve 22 is provided between the magnetic conductor 16 and the barrel shell 7.

[0022] The output shaft 12 is provided with a slide bar rigid connecting rod 5, the end of the slide bar rigid connecting rod 5 is smoothly set, a clamp head 1 is provided at the moving track line position of the end of the connecting rod 5, and a clamping groove 26 is provided at the bottom of the clamp head 1, and the clamping groove 26 is movably connected with the clamp head 1. The setting of the clamp head limits the displacement of the slide bar rigid connecting rod 5, and the slide bar rigid connecting rod 5 can enter the clamping groove 26 by horizontally moving from the two side surfaces of the clamp head (the side surfaces must be made into inclined surfaces) to overcome the resistance of the return spring 3 to the clamp head in the vertical direction. Once entering the clamping groove 26 (the length of the clamping groove is greater than the compression stroke of the spring, and the inner surface processing must be vertical), the spring returns, and the slide bar rigid connecting rod 5 cannot continue to move.

[0023] The chuck 1 is connected to the positioning electromagnet 4 or the push rod of the electric push rod or the pneumatic push rod. The positioning electromagnet 4 includes a positioning electromagnet housing 41 and a chuck 1. A positioning electromagnet moving iron core 43 is provided in the positioning electromagnet housing 41. A coil 45 is disposed outside the positioning electromagnet moving iron core 43. A return spring 3 is provided on the top of the positioning electromagnet moving iron core, and the bottom end of the spring 1 is against the top of the positioning electromagnet moving iron core 43. Function of the return spring 3: When the positioning electromagnet group does not provide power, the spring is in a natural state, so that the chuck is in a clamping position. The output shaft of the positioning electromagnet moving iron core is connected to the chuck connecting rod 2, and the chuck connecting rod 2 is connected to the chuck 1 through the axial hole at the bottom of the positioning electromagnet housing. The chuck connecting rod 2 is rigidly connected to the return spring and the mechanical component controlled by the positioning electromagnet that provides the chuck displacement. The positioning electromagnet group controls the mechanical component and overcomes the resistance of the spring to produce a displacement in the direction of spring compression (while driving the chuck connecting rod to move), thereby eliminating the restriction on the left and right displacement of the chuck on the rigid connecting rod 5 with the slide rod.

[0024] Function of positioning electromagnet group 4: The positioning electromagnet group is a small electromagnet device, the mechanical component it controls is the iron core, which is turned on and off by the controller 14TCU controller.

[0025] The cylinder housing 7 is provided with a coil electrical connector 9. The positioning electromagnet housing 41 is provided with a positioning electromagnet coil electrical connector 42. The excitation coil 8 is electrically connected to the coil electrical connector 9. The positioning coil is electrically connected to the positioning electromagnet coil electrical connector. The coil electrical connector 9, the displacement sensor, the positioning electromagnet coil electrical connector or the electric drive terminal of the electric push rod or the electric drive terminal of the pneumatic push rod are all electrically connected to the TCU controller.

[0026] Example 2

[0027] A three-position self-holding electromagnet device comprises a moving iron core 11, a moving iron core support structure 100, and a TCU controller 14. The moving iron core support structure is formed by connecting a left fixed armature 20 and a right fixed armature 21. The outer ends of the inner parts of the left fixed armature 20 and the right fixed armature 21 are provided with an axial hole 121. The output shafts 122 and 12 are slidably arranged in the axial hole 121. A sliding bearing 15 is also arranged in the axial hole 121. The left fixed armature 20 and the right fixed armature 21 are magnetic conductors, and the inner parts thereof are arranged between the excitation coil 8 and the moving iron core 11. A sliding rod rigid connecting rod 5 is arranged on the moving iron core. A sliding rod through hole is also arranged between the left fixed armature 20 and the right fixed armature 21. The sliding rod rigid connecting rod 5 is arranged through the sliding rod through hole, and the sliding rod through hole is a waist hole.

[0028] The left and right ends of the moving iron core 11 are axially provided with output shafts 122 and 12, respectively, and the output shafts 122 and 12 are slidably arranged in the shaft hole 121 of the moving iron core support structure. The moving iron core 11 is provided with a sliding rod rigid connecting rod 5. More preferably, a permanent magnet 10 is provided in the middle of the moving iron core 11, and a sliding rod rigid connecting rod 5 is provided on the permanent magnet 10. This is convenient for better maintaining balance between the left fixed armature 20 (including the excitation coil) and the right fixed armature 21 (including the excitation coil).

[0029] A ceramic sleeve 22 is provided between the moving iron core 11 and the slide rod rigid connecting rod 5. The end of the slide rod rigid connecting rod 5 is smoothly arranged, and a clamping head 1 is provided at the moving track line position of the end of the connecting rod 5. A clamping groove 26 is provided at the bottom of the clamping head 1, and the clamping groove 26 is movably connected to the clamping head 1.

[0030] The chuck 1 is connected to the positioning electromagnet 4 or the push rod of the electric push rod or the pneumatic push rod. The positioning electromagnet 4 includes a positioning electromagnet housing 41 and a chuck 1. A positioning electromagnet moving iron core 43 is provided in the positioning electromagnet housing 41. A coil 45 is disposed outside the positioning electromagnet moving iron core 43. A return spring 3 is provided on the top of the positioning electromagnet moving iron core, and the bottom end of the spring 1 is against the top of the positioning electromagnet moving iron core 43. Function of the return spring 3: When the positioning electromagnet group does not provide power, the spring is in a natural state, so that the chuck is in a clamping position. The output shaft of the positioning electromagnet moving iron core is connected to the chuck connecting rod 2, and the chuck connecting rod 2 is connected to the chuck 1 through the axial hole at the bottom of the positioning electromagnet housing. The chuck connecting rod 2 is rigidly connected to the return spring and the mechanical component controlled by the positioning electromagnet that provides the chuck displacement. The positioning electromagnet group controls the mechanical component and overcomes the resistance of the spring to produce a displacement in the direction of spring compression (while driving the chuck connecting rod to move), thereby eliminating the restriction on the left and right displacement of the chuck on the rigid connecting rod 5 with the slide rod.

[0031] Function of positioning electromagnet group 4: The positioning electromagnet group is a small electromagnet device, the mechanical component it controls is the iron core, which is turned on and off by the controller 14TCU controller.

[0032] The left fixed armature 20 or the right fixed armature 21 is provided with a coil electrical connector. The excitation coil 8 is electrically connected to the coil electrical connector 9, the positioning coil is electrically connected to the positioning electromagnet coil electrical connector, and the coil electrical connector 9, the displacement sensor, the positioning electromagnet coil electrical connector or the electric drive terminal of the electric push rod or the electric drive terminal of the pneumatic push rod are all electrically connected to the TCU controller.

[0033] Working principle: When the moving iron core 11 needs to move from the left or right extreme position to the middle position, the controller TCU controller 14 first energizes the left excitation coil 8 and the right excitation coil 9, and moves to the middle position with the slide rod rigid connecting rod 5 (moves with the moving iron core). When it contacts the outer side of the clamping head 1, it overcomes the resistance of the return spring 3 with the slide rod rigid connecting rod 5, falls into the clamping groove of the clamping head 1 and enters the clamping state (middle position). At this time, even if the excitation coil continues to be energized, the moving iron core cannot move left or right. When the displacement sensor 13 recognizes that the moving iron core 11 is in the middle, stop energizing the coil 45;

[0034] When the moving iron core needs to move from the middle position to the left limit or right limit position, the blocking state is first released (the positioning electromagnet group is powered by the controller 14TCU controller to provide power to pull the clamping head in the compression direction of the return spring), and then the TCU controller 14 energizes the left excitation coil 8 and the right excitation coil 9 to realize the left and right movement of the moving iron core. At the same time, when the displacement sensor 13 recognizes that the moving iron core 11 has reached the left / right limit position, the coil and the positioning electromagnet group are stopped from being energized.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A three-position self-holding electromagnet device, comprising a moving iron core, a moving iron core support structure, and a TCU controller, characterized in that An excitation coil is sleeved on the outside of the moving iron core, and a magnetic conductor is arranged between the excitation coil and the moving iron core. An output shaft is axially arranged at the left and right ends of the moving iron core respectively, and the output shaft is slidably arranged in the axial hole of the moving iron core support structure. A sliding rod rigid connecting rod is arranged on the moving iron core or the output shaft, and the end of the sliding rod rigid connecting rod is smoothly arranged, and a clamping head is arranged at the moving trajectory line position of the end of the connecting rod, and a clamping groove is arranged at the bottom of the clamping head, and the clamping groove is movably connected to the clamping head, and the clamping head is connected to the push rod of the positioning electromagnet or the electric push rod or the pneumatic push rod. A displacement sensor is arranged near the output shaft, and the electric drive terminals of the excitation coil, the displacement sensor, and the positioning electromagnet or the electric push rod or the pneumatic push rod are all electrically connected to the TCU controller. The moving iron core support structure is a barrel shell, and shaft holes are arranged at both ends of the barrel shell. The output shaft is slidably arranged in the shaft holes, and a sliding rod rigid connecting rod is arranged on the output shaft. A permanent magnet is arranged in the middle of the shell, and a left excitation coil is sleeved on the left part of the permanent magnet The right part of the permanent magnet is sleeved with a right excitation coil, and a porcelain sleeve is provided between the magnetic conductor and the shell, and the moving iron core supporting structure is formed by connecting the left fixed armature and the right fixed armature, and the outer ends of the inner sides of the left fixed armature and the right fixed armature are provided with an axial hole, and the output shaft is slidably arranged in the axial hole, and the left fixed armature and the right fixed armature are magnetic conductors, and their inner sides are arranged between the excitation coil and the moving iron core, and a sliding rod rigid connecting rod is provided on the moving iron core, and a sliding rod through hole is also provided between the left fixed armature and the right fixed armature, and the sliding rod rigid connecting rod is arranged through the sliding rod through hole; the positioning electromagnet includes a positioning electromagnet shell and a clamp, and a positioning electromagnet moving iron core is provided in the positioning electromagnet shell, and a positioning coil is arranged outside the positioning electromagnet moving iron core, and a return spring is provided on the top of the positioning electromagnet moving iron core, and the output shaft of the positioning electromagnet moving iron core is connected with the clamp connecting rod, and the clamp connecting rod passes through the axial hole at the bottom of the positioning electromagnet shell and is connected with the clamp.

2. The three-position self-holding electromagnet device according to claim 1, characterized in that: The sliding rod through hole is a waist hole.

3. The three-position self-holding electromagnet device according to claim 1 is characterized in that: A porcelain isolation sleeve is provided between the moving iron core and the sliding rod rigid connecting rod.

4. The three-position self-holding electromagnet device according to claim 1, characterized in that: A sliding bearing is also arranged in the shaft hole.

5. The three-position self-holding electromagnet device according to claim 1, characterized in that: The bottom end of the return spring abuts against the top end of the moving iron core of the positioning electromagnet.

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