A manual and automatic stroke adjustable electromagnetic actuator

Abstract

The invention relates to an electromagnetic actuator, and discloses a manual and automatic integrated stroke-adjustable electromagnetic actuator, comprising a yoke body, an annular groove is provided on the side of the yoke body, an electromagnetic coil is fixed in the annular groove by resin casting, and the end face of the yoke body located on one side of the annular groove is connected to the yoke body and the armature by an adjustable screw with adjustable length; an actuator assembly is provided at the center hole of the armature, and the armature can drive the actuator assembly to move along the axis direction of the yoke body; a reset spring is installed in the yoke body, and the end of the reset spring abuts against the bottom surface of the actuator assembly. The invention solves the problem that the existing electromagnetic actuator has a fixed execution stroke and cannot adjust the execution stroke in an emergency or abnormal state.

Description

Technical Field

[0001] The present invention relates to an electromagnetic actuator, in particular to a manual and automatic electromagnetic actuator with adjustable stroke Background Art

[0002] With the improvement of the electrification and intelligence level of existing mechanical equipment, the original hydraulically driven or pneumatically driven actuators are gradually being replaced by electromagnetic actuators due to their large size and poor sealing effect. The general structure of the existing electromagnetic actuators is to use spring force to lift the brake component to achieve the stroke of the actuator, and then overcome the spring force through the action of the electromagnetic coil to achieve the release of the actuator. With the increasing application of electromagnetic actuators, the problems existing in the existing electromagnetic actuators are gradually emerging. The stroke of the existing electromagnetic actuators is fixed, which makes it impossible to effectively adjust the stroke of the actuator in an emergency or abnormal state, which greatly limits its scope of use. Summary of the invention

[0003] Based on the above technical problems, the present invention provides a manual-automatic electromagnetic actuator with adjustable stroke, which solves the problem that the existing electromagnetic actuator has a fixed execution stroke and cannot adjust the execution stroke under emergency or abnormal conditions.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A manual and automatic electromagnetic actuator with adjustable stroke comprises a yoke body, a circular groove is provided on the side of the yoke body, an electromagnetic coil is fixed in the circular groove by resin casting, the end face of the yoke body located on one side of the circular groove is connected with the armature by an adjustable screw with adjustable length; an actuator assembly is provided at the center hole of the armature, and the armature can drive the actuator assembly to move along the axis direction of the yoke body; a reset spring is installed in the yoke body, and the end of the reset spring abuts against the bottom surface of the actuator assembly.

[0006] As a preferred embodiment, the adjustable screw is composed of a fixed screw, a locking micro nut and a fixed screw seat, and the fixed screw seat is provided with an internal threaded hole and a through hole connected to the internal threaded hole; the locking micro nut is screwed into the internal threaded hole, and the fixed screw part is screwed into the internal threaded hole.

[0007] As a preferred embodiment, a manual unlocking mechanism for manual operation is provided on the yoke body, and the manual unlocking mechanism includes a long screw rod, which passes through the armature and the yoke body to movably connect the two; the long screw rod is located at the other end of the armature and is connected to the U-shaped handle through a self-locking nut.

[0008] As a preferred embodiment, a groove matching the swivel pin is provided at the connection between the U-shaped handle and the long screw, and the swivel pin passes through the long screw and is placed in the groove; a stopper with an L-shaped notch is fixedly installed on the end face of the yoke body at the position of the operating rod of the U-shaped handle.

[0009] As a preferred embodiment, two sealing rings are provided on the long screw.

[0010] As a preferred embodiment, the actuator assembly is composed of an upper bearing seat, a lower bearing seat and a rotatable bearing sleeve, and the bearing sleeve is composed of a base and a shaft sleeve; the upper bearing seat and the lower bearing seat are riveted to form a retaining frame to clamp the bearing sleeve base between the two; the upper bearing seat and the lower bearing seat are provided with a plurality of radially surrounding placement grooves for placing steel balls on the surface of the side close to the bearing sleeve base, and an annular rolling groove is provided at a position corresponding to the end face of the bearing sleeve base and the placement groove, and steel balls are clamped and placed in the annular rolling groove and the placement groove.

[0011] As a preferred embodiment, the shaft sleeve can movably pass through the center hole of the armature, and the upper bearing seat is in close contact with the armature.

[0012] As a preferred embodiment, a micro switch is provided in the wire outlet seat on the side of the yoke body, and a switch collision block is provided on the armature at a position corresponding to the micro switch, and the switch collision block can press the micro switch as the armature moves.

[0013] As a preferred embodiment, an adjusting bolt is provided in the reset spring mounting hole in the yoke body.

[0014] As a preferred embodiment, the electromagnetic coil is composed of a first electromagnetic coil and a second electromagnetic coil connected in series.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention uses an adjustable screw with adjustable length to flexibly connect the yoke body and the armature, so that the distance between the armature and the yoke body can be adjusted by adjusting the length of the adjustable screw. In this way, the execution stroke of the entire electromagnetic actuator can be changed, solving the problem that the execution stroke of the existing electromagnetic actuator is fixed and cannot be adjusted in an emergency or abnormal state.

[0017] (2) The present invention is also provided with a manual unlocking mechanism for manually controlling the electromagnetic actuator, which can control the electromagnetic actuator by manual operation when the electromagnetic coil in the electromagnetic actuator fails and loses its magnetic force, thereby enhancing the safety of the electromagnetic actuator.

[0018] (3) The present invention ensures that the braking torque of the electromagnetic actuator does not change after the execution stroke of the electromagnetic actuator is adjusted by means of the adjusting bolt in the installation hole of the reset spring and the first electromagnetic coil and the second electromagnetic coil connected in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Axonometric drawing of electromagnetic actuator Figure 1 .

[0020] Figure 2 Axonometric drawing of electromagnetic actuator Figure 2

[0021] Figure 3 It is the side view of the electromagnetic actuator.

[0022] Figure 4 This is the axonometric view of the yoke body.

[0023] Figure 5 Bearing assembly drawing for the actuator.

[0024] Figure 6 Schematic diagram of the adjustable screw structure.

[0025] Figure 7 This is a working diagram of the electromagnetic actuator.

[0026] Figure 8 Schematic diagram of the stopper assembly.

[0027] Among them, 1 outlet seat, 2 yoke body, 201 annular groove, 202 reset spring mounting hole, 3 swivel pin, 4 self-locking nut, 5 long screw, 6 U-shaped handle, 7 operating rod, 8 switch bumper, 9 armature, 10 adjustable screw, 1001 fixed screw, 1002 locking micro nut, 1003 fixed screw seat, 1004 through hole, 11 actuator, 1101 lower bearing seat, 1102 steel ball, 1103 placement groove, 1104 upper bearing seat, 1105 rolling groove, 1106 base, 1107 sleeve, 12 sealing ring, 13 micro switch, 14 driven wheel, 15 clutch disc, 16 brake disc, 17 driving shaft, 18 adjusting bolt, 19 reset spring, 20 first electromagnetic coil, 21 second electromagnetic coil, 22 block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Example:

[0031] See also Figures 1 to 8 A manual and automatic stroke-adjustable electromagnetic actuator comprises a yoke body 2, a side of the yoke body 2 is provided with an annular groove 201, an electromagnetic coil is fixed in the annular groove 201 by resin casting, the end face of the yoke body 2 on one side of the annular groove 201 is connected to the yoke body 2 and the armature 9 by an adjustable screw 10 with adjustable length; an actuator assembly 11 is provided at the center hole of the armature 9, and the armature 9 can drive the actuator assembly 11 to move along the axis direction of the yoke body 2; a reset spring 19 is installed in the yoke body 2, and the end of the reset spring 19 abuts against the bottom surface of the actuator assembly 11.

[0032] In this embodiment, the execution stroke of the actuator is the stroke distance that the armature 9 moves when it is attracted by the electromagnet. In this application, the yoke body 2 of the electromagnetic actuator is movably connected to the armature 9 through an adjustable screw 10 with adjustable length. By adjusting the length of the adjustable screw 10, the execution stroke of the entire electromagnetic actuator can be adjusted, thereby solving the problem that the execution stroke of the existing electromagnetic actuator cannot be adjusted.

[0033] Furthermore, the adjustable screw 10 is composed of a fixed screw 1001, a locking micro nut 1002 and a fixed screw seat 1003. The fixed screw seat 1003 is provided with an internal threaded hole and a through hole 1004 connected to the internal threaded hole; the locking micro nut 1002 is screwed into the internal threaded hole, and the fixed screw 1001 is partially screwed into the internal threaded hole.

[0034] The execution stroke of the electromagnetic actuator is adjusted by adjusting the length of the adjustable screw 10. When the length of the adjustable screw 10 needs to be adjusted, the fixed screw 1001 is rotated, and the length of the entire adjustable screw 10 is adjusted by adjusting the length of the fixed screw 1001 in the screw hole in the fixed screw seat 1003. After the length of the fixed screw 1001 is adjusted, a screwdriver is inserted from the through hole 1004 to rotate the locking micro nut 1002 so that it fits and locks the fixed screw 1001 so that the fixed screw 1001 cannot be screwed in, so as to prevent the fixed screw 1001 from rotating when the fixed screw 1001 is rotated and installed with the end face screw hole of the yoke body 2, thereby causing the length of the adjustable screw 10 to change.

[0035] When the length of the adjustable screw 10 changes, the movable stroke of the armature 9 also changes, thereby achieving the adjustment of the execution stroke of the electromagnetic actuator.

[0036] Furthermore, a manual unlocking mechanism for manual operation is provided on the yoke body 2, and the manual unlocking mechanism includes a long screw 5, which passes through the armature 9 and the yoke body 2 to movably connect the two; the long screw 5 is located at the other end of the armature 9 and is connected to the U-shaped handle 6 through a self-locking nut 4.

[0037] When the electromagnet fails and the manual unlocking mechanism needs to be used, the U-shaped handle 6 is lifted, and the end of the U-shaped handle 6 is against the end surface of the yoke body 2 and the entire U-shaped handle 6 is tilted. The tilted U-shaped handle 6 drives the long screw 5 to move, thereby driving the armature 9 to be close to the yoke body 2 to complete the manual unlocking operation. When the electromagnetic coil in the electromagnetic actuator fails and loses its magnetic force, the electromagnetic actuator can be controlled by manual operation, which enhances the safety of the electromagnetic actuator.

[0038] Furthermore, a groove adapted to the swivel pin 3 is provided at the connection between the U-shaped handle 6 and the long screw 5, and the swivel pin 3 passes through the long screw 5 and is placed in the groove; the end face of the yoke body 2 is located at the position of the operating rod 7 of the U-shaped handle 6 and is fixedly installed with a stopper 22 with an L-shaped groove.

[0039] By using the stopper 22 with an L-shaped notch, during the manual unlocking process, the U-shaped handle 6 is lifted to complete the unlocking. Then the U-shaped handle 6 is rotated to place its operating rod 7 on the notch of the stopper 22. The stopper props up the U-shaped handle 6 to keep it in a tilted state, so that the manual unlocking mechanism can remain in an unlocked state. The swivel pin 3 can provide a toggling force when the U-shaped handle 6 is rotated, facilitating the rotation of the U-shaped handle 6.

[0040] Furthermore, two sealing rings 12 are provided on the long screw rod 5. Through the two sealing rings 12 structure, dustproof and waterproof functions are achieved while providing sufficient elastic support for the screw rod in the structure.

[0041] Furthermore, the actuator 11 is composed of an upper bearing seat 1104, a lower bearing seat 1101 and a rotatable bearing sleeve, and the bearing sleeve is composed of a base 1106 and a shaft sleeve 1107; the upper bearing seat 1104 and the lower bearing seat 1101 are riveted to form a retaining frame to clamp the bearing sleeve base 1106 therebetween; the upper bearing seat 1104 and the lower bearing seat 1101 are provided with radially surrounding placement grooves 1103 for placing steel balls 1102 on the surface of one side close to the bearing sleeve base 1106, and an annular rolling groove 1105 is provided at a position corresponding to the end face of the bearing sleeve base 1106 and the placement groove 1103, and the steel balls 1102 are clamped and placed in the annular rolling groove 1105 and the placement groove 1103.

[0042] Figure 7 This is a simplified schematic diagram of one of the specific application scenarios of the electromagnetic actuator. When the electromagnetic actuator is used, the sleeve 1107 is connected to the driving shaft 17 through a spline, and the end of the sleeve 1107 is also fixed with a clutch disc 15 by screws. The rotating mechanism adapted to the electromagnetic actuator is provided with a non-rotatable brake disc 16 and a rotatable driven wheel 14. When the electromagnetic coil is not energized, the clutch disc 15 engages with the brake disc 16. Due to the friction between the clutch disc 15 and the brake disc 16, the system is in a locked state. After the electromagnetic coil is energized, the clutch disc 15 is driven by the actuator 11 to engage with the driven wheel 14 and start the driving shaft 17. At this time, the compression spring is compressed. Due to the friction between the clutch disc 15 and the driven wheel 14, the clutch disc 15 will drive the driven wheel 14 to rotate at this time, thereby driving the rotating mechanism to operate. After the electromagnetic coil power is disconnected again, the reset spring 19 resets and pushes the actuator 11 to engage with the brake disc 16 and return to the locked state.

[0043] After the electromagnetic actuator has been operated for many times, the friction between the clutch disc 15, the brake disc 16 and the driven wheel 14 will cause the clutch disc 15 to wear continuously. The contact surface between the worn clutch disc 15, the brake disc 16 and the driven disc becomes smaller, so that the friction between them is reduced, resulting in the clutch disc 15 being unable to reach the unlocked and locked states, thereby making the electromagnetic actuator unable to operate. Traditional electromagnetic actuators cannot change the execution stroke, and the solution to this problem is to replace the clutch disc 15, resulting in excessively high maintenance costs. The present application uses an adjustable execution stroke. When the above problem occurs, the execution stroke of the electromagnetic actuator is increased, so that the worn clutch disc 15 can still fit tightly with the brake disc 16 and the driven wheel 14, ensuring the normal operation of the entire system.

[0044] Furthermore, the shaft sleeve 1107 can movably pass through the center hole of the armature 9, and the upper bearing seat 1104 is in contact with the armature 9. During the unlocking process, the armature 9 pushes the actuator 11 to move, and during the locking process, the actuator 11 pushes the armature 9 to move. While ensuring that the armature 9 and the actuator 11 can move together, the armature 9 and the actuator 11 that are movably connected in this way can more easily replace and maintain the actuator 11 than the fixed connection method, so that the actuator 11 can be replaced according to different usage scenarios, thereby enhancing the scope of application of the electromagnetic actuator.

[0045] Furthermore, a micro switch 13 is provided in the outlet seat 1 on the side of the yoke body 2 , and a switch collision block 8 is provided on the armature 9 at a position corresponding to the micro switch 13 , and the switch collision block 8 can press the micro switch 13 as the armature 9 moves.

[0046] The micro switch 13 is used to control the rotation of the driving shaft 17, because when the clutch disc 15 and the brake disc 16 are not out of the braking state, starting the driving shaft 17 will easily cause the clutch disc 15 to be worn. Therefore, through the micro switch 13, when the armature 9 drives the switch collision block 8 to press the micro switch 13, it means that the electromagnetic actuator is switched from the locked state to the unlocked state. At this time, the micro switch 13 sends an electrical signal to start the driving shaft 17, which can effectively reduce the wear of the clutch disc 15. In addition, if the electromagnetic coil does not absorb the armature 9 in place, the micro switch will not be triggered, which can also play a certain insurance role.

[0047] Furthermore, an adjusting bolt 18 is provided in the reset spring mounting hole 202 in the yoke body 2. When performing stroke adjustment, the position of the reset spring 19 is adjusted by adjusting the position of the bolt 18 in the screw hole, thereby ensuring that the torque of the reset spring 19 does not change after the stroke adjustment is completed.

[0048] Furthermore, the electromagnetic coil is composed of a first electromagnetic coil 20 and a second electromagnetic coil 21 connected in series. The first electromagnetic coil 20 and the second electromagnetic coil 21 are used to form a multi-stage coil structure. When the execution stroke adjustment is completed, the execution stroke increases and the first electromagnetic coil 20 and the second electromagnetic coil 21 are connected in series to increase the electromagnetic force. When the execution stroke decreases, the first electromagnetic coil 20 is used alone to save energy. By using the multi-stage electromagnetic coils in a reasonable combination, it is ensured that the electromagnetic force provided by the entire electromagnetic actuator can meet the requirements of the system.

[0049] The above is an embodiment of the present invention. The above embodiments and the specific parameters in the embodiments are only for the purpose of clearly describing the verification process of the invention, and are not intended to limit the patent protection scope of the present invention. The patent protection scope of the present invention shall still be subject to its claims, and any equivalent structural changes made by using the contents of the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manual-automatic electromagnetic actuator with adjustable stroke, comprising a yoke body (2), a side surface of the yoke body (2) being provided with an annular groove (201), an electromagnetic coil being fixed in the annular groove (201) by resin casting, characterized in that: The end surface of the yoke body (2) located on one side of the annular groove (201) movably connects the yoke body (2) and the armature (9) via an adjustable screw (10) with adjustable length; an actuator assembly (11) is provided at the center hole of the armature (9), and the armature (9) can drive the actuator assembly (11) to move along the axial direction of the yoke body (2); a return spring (19) is installed in the yoke body (2), and the end of the return spring (19) abuts against the bottom surface of the actuator assembly (11); The actuator assembly (11) is composed of an upper bearing seat (1104), a lower bearing seat (1101) and a rotatable bearing sleeve, and the bearing sleeve is composed of a base (1106) and a shaft sleeve (1107); The upper bearing seat (1104) and the lower bearing seat (1101) are riveted to form a retaining frame to clamp the bearing sleeve base (1106) therebetween; The upper bearing seat (1104) and the lower bearing seat (1101) are provided with a plurality of placement grooves (1103) radially surrounding the surface on one side close to the bearing sleeve base (1106) for placing steel balls (1102); An annular rolling groove (1105) is provided at a position corresponding to the end surface of the base (1106) and the placement groove (1103), and a steel ball (1102) is clamped and placed in the annular rolling groove (1105) and the placement groove (1103); The shaft sleeve (1107) can movably pass through the center hole of the armature (9), and the upper bearing seat (1104) is in close contact with the armature (9); The lower bearing seat (1101) abuts against the end of the return spring (19); The shaft sleeve (1107) is connected to the driving shaft (17) via a spline, and a clutch disc (15) is fixed to the end of the shaft sleeve (1107) via screws; a non-rotatable brake disc (16) and a rotatable driven wheel (14) are provided on a rotating mechanism adapted to the electromagnetic actuator.

2. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 1, characterized in that: The adjustable screw (10) is composed of a fixed screw (1001), a locking micro nut (1002) and a fixed screw seat (1003); the fixed screw seat (1003) is provided with an internal threaded hole and a through hole (1004) connected to the internal threaded hole; the locking micro nut (1002) is screwed into the internal threaded hole, and the fixed screw (1001) is partially screwed into the internal threaded hole.

3. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 1, characterized in that: The yoke body (2) is provided with a manual unlocking mechanism for manual operation, the manual unlocking mechanism comprising a long screw (5), the long screw (5) passing through the armature (9) and the yoke body (2) to movably connect the two; the end of the long screw (5) located on the other side of the armature (9) is connected to the U-shaped handle (6) through a self-locking nut (4).

4. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 3, characterized in that: A groove adapted to the slewing pin (3) is provided at the connection between the U-shaped handle (6) and the long screw (5), and the slewing pin (3) passes through the long screw (5) and is placed in the groove; a stopper (22) with an L-shaped notch is fixedly installed on the end surface of the yoke body (2) at the position of the operating rod (7) of the U-shaped handle (6).

5. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 3, characterized in that: The long screw (5) is provided with two sealing rings (12).

6. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 1, characterized in that: A micro switch (13) is provided in the outlet seat (1) on the side of the yoke body (2), and a switch collision block (8) is provided on the armature (9) at a position corresponding to the micro switch (13). The switch collision block (8) can move with the armature (9) to press the micro switch (13).

7. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 1, characterized in that: An adjusting bolt (18) is provided in the return spring mounting hole (202) in the yoke body (2).

8. The manual-automatic electromagnetic actuator with adjustable stroke according to claim 1, characterized in that: The electromagnetic coil is composed of a first electromagnetic coil (20) and a second electromagnetic coil (21) connected in series.

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