Bolt electromagnet with manual unlocking function

Abstract

The utility model relates to the technical field of electromagnets, in particular to a bolt electromagnet with a manual unlocking function, which comprises a yoke assembly and a bolt assembly, and the bolt assembly is mounted in the yoke assembly. The bolt assembly comprises an iron core, a bolt body and a bolt shaft, and the iron core is located between the bolt body and the bolt shaft; the plug pin shaft comprises a power connection section far away from one side of the iron core and a shaft end section located between the iron core and the power connection section, and the shaft end section is sleeved with a spring body; the power connection section is located on the outer side of the yoke assembly and provided with a wire outlet cover, a travel switch is arranged in the wire outlet cover, the end, away from the shaft end section, of the power connection section is connected with a release rod assembly located at the outer end of the wire outlet cover, and the outer wall of the power connection section is of a slope surface structure. The releasing rod assembly can drive the bolt shaft to stretch out and draw back so that the travel switch can be turned on or turned off through the outer wall structure of the power connection section, and the releasing state of the bolt body is locked. According to the bolt electromagnet, the bolt body can be pulled out and released in a labor-saving mode, and electromagnet damage caused by excessive heating can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of electromagnet technology, and specifically provides a pin electromagnet with a manual release locking function. Background Technology

[0002] An electromagnet is a device that generates electromagnetic force when an electric current flows through it. Its working principle is based on electromagnetic induction, meaning that when an electric current passes through a conductor, a magnetic field is generated around the conductor. An electromagnet mainly consists of a coil, an iron core, and a power source. The coil is typically one or more coils wound around an iron core, which is usually made of iron and used to enhance the magnetic field generated by the coil. The power source provides the current, which flows through the coil to generate the magnetic field. The main characteristics of an electromagnet include controllability, fast response, and no permanent magnetism. Controllability means that the presence and strength of the magnetic field can be controlled by adjusting the amount and magnitude of the current. Fast response means that the magnetic field of an electromagnet can be established and dissipated quickly, making it suitable for applications requiring rapid switching. No permanent magnetism means that the magnetic field disappears when the power is turned off, and the iron core does not retain magnetism. Electromagnets have a wide range of applications, including but not limited to electromagnetic switches, electromagnetic valves, electromagnetic cranes, electromagnetic locks, and electromagnetic relays.

[0003] Electromagnets can generate axial attraction forces of varying magnitudes through electromagnetic effects under different voltages. This displacement controls the stroke of the control device, and different control signals are transmitted electrically or mechanically according to changes in the stroke. Generally, when a pin-type electromagnet is released, continuous energization is required to maintain the attraction force, or only simple manual pulling methods such as pull rings or levers can be used. These methods can only release the pin-type electromagnet briefly and cannot lock it in a released state. Furthermore, the required axial pulling force is relatively large, especially in cases where the pin is severely stuck, making manual release difficult. Therefore, designing a pin-type electromagnet with a manual release and locking function to solve these problems is an urgent issue that needs to be addressed. Utility Model Content

[0004] To solve the above problems, this utility model provides a pin electromagnet with a manual release locking function.

[0005] This utility model provides a pin electromagnet with manual release and locking function, including a yoke assembly and a pin assembly, with the pin assembly installed inside the yoke assembly. The pin assembly includes an iron core, a pin body, and a pin shaft, with the iron core located between the pin body and the pin shaft. The pin shaft includes a contact section away from the iron core and a shaft end section located between the iron core and the contact section, with a spring body fitted on the shaft end section. The contact section is located outside the yoke assembly and has a wire outlet cover. A limit switch is provided inside the wire outlet cover. A release rod assembly located outside the wire outlet cover is connected to one end of the contact section away from the shaft end section. The outer wall of the contact section has a sloping surface structure. The release rod assembly can drive the pin shaft to extend and retract to open or close the limit switch through the outer wall structure of the contact section and lock the release state of the pin body.

[0006] Furthermore, the release lever assembly includes a cam and a pin for connecting the cam and the electrical contact section in the pin shaft; a cotter pin is provided on the pin, and a manual lever is connected to the cam.

[0007] Furthermore, the cam abuts against the wire outlet cover, and the surface of the wire outlet cover that abuts against the cam is a planar structure; when the planar part of the cam abuts against the wire outlet cover, the pin body is locked in a released state.

[0008] Furthermore, the limit switch includes a spring with a flexible pulley that can roll on the outer wall of the energized section. When the slope of the energized section moves to the pulley, the energized section presses the pulley and drives the spring to connect the limit switch.

[0009] Furthermore, an electrical connector is provided on the cable outlet cover, which is electrically connected to the lead wires of the yoke assembly and the limit switch.

[0010] Furthermore, the yoke assembly includes a yoke body, a coil, and a rear end cover. The coil is installed inside the yoke body and located outside the iron core. The rear end cover is sleeved on the pin shaft and located between the yoke body and the lead wire cover.

[0011] Furthermore, the rear end cover includes an extension section located between the pin shaft and the coil, and a spring body is disposed between the shaft end section and the extension section.

[0012] Furthermore, the coil is a dual-coil structure comprising a large-resistance coil and a small-resistance coil.

[0013] Furthermore, a dust cover is fitted onto the pin body, and the dust cover is installed on the yoke body by screws.

[0014] Furthermore, a sealing groove 1 is provided on the end face of the dust cover near the pin body, and a sealing groove 2 is provided on the end face of the output coil near the wiring section. Both sealing groove 1 and sealing groove 2 are provided with sealing rings.

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

[0016] 1. The pin electromagnet in this utility model is simple to implement. It adopts the lever lifting principle of cam component, which can realize the effortless lifting and release of the pin body, and can lock the released state after lifting 90 degrees, realizing the manual release and locking of the pin electromagnet.

[0017] 2. The pin electromagnet in this utility model uses a limit switch to automatically switch the current when the electromagnet is engaged and after it is fully engaged. The large current start-up achieves a large engagement force for pin removal, while the small current maintains the engagement for a long time, avoiding excessive heat that could damage the electromagnet.

[0018] 3. The pin electromagnet in this utility model has a good sealing structure that can effectively prevent dust and sand from entering and causing jamming. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the pin electromagnet provided according to an embodiment of the present utility model;

[0020] Figure 2 This is a structural schematic diagram of the manual release lever in the pin electromagnet provided according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the manual release and locking function of the latch electromagnet provided according to an embodiment of the present utility model.

[0022] The reference numerals in the attached drawings include: sealing ring 1, dust cover 2, yoke 3, iron core 4, coil 5, spring body 6, rear end cover 7, wire outlet cover 8, electrical connector 9, limit switch 10, pin body 11, manual lever 12, shaft end section 13, power connection section 14, extension section 15, shaft pin 16, cam component 17, and cotter pin 18. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and do not constitute a limitation thereof.

[0024] A latch electromagnet with a manual release locking function includes a yoke assembly and a latch assembly, the latch assembly being installed within the yoke assembly. Figure 1 As shown, the pin assembly includes an iron core 4, a pin body 11, and a pin shaft. The iron core 4 is located between the pin body 11 and the pin shaft. The pin body 11 and the iron core 4 are connected by pins. The pin shaft includes an electrical contact section 14 and a shaft end section 13. The electrical contact section 14 is located on the side away from the iron core 4. The shaft end section 13 is located between the iron core 4 and the electrical contact section 14. A spring body 6 is fitted on the shaft end section 13.

[0025] The energizing section 14 is located outside the yoke assembly, and a cable exit cover 8 is provided on the energizing section 14. A limit switch 10 is installed inside the cable exit cover 8. The limit switch 10 automatically switches the current during electromagnet engagement and after engagement. High-current start-up achieves high-force engagement, while low-current holding achieves prolonged engagement, preventing overheating and damage to the electromagnet. The limit switch 10 includes a spring with a flexible pulley. The outer wall of the energizing section 14 has a sloping surface structure, allowing the pulley to roll on the outer wall. When the sloping surface of the energizing section 14 moves to the pulley, the energizing section 14 presses the pulley and drives the spring to activate the limit switch 10, thus achieving high-current start-up and low-current holding of the electromagnet. An electrical connector 9 is provided on the cable exit cover 8. The electrical connector 9 is electrically connected to the lead wire of the yoke assembly and the limit switch 10. The electrical connector 9 is used for power input and signal feedback. The sloping surface of the energizing section 14... Figure 1 As shown at point K.

[0026] A release lever assembly is connected to one end of the energized section 14 away from the shaft end section 13. This release lever assembly can extend or retract the pin shaft to open or close the limit switch 10 via the outer wall structure of the energized section 14, and lock the pin body 11 in the released state. Figure 1 , Figure 2 As shown, the release lever assembly includes a cam 17 and a pin 16 for connecting the cam 17 and the electrical contact section 14 in the pin shaft; a cotter pin 18 is provided on the pin 16, and a manual lever 12 is connected to the cam 17. The cam 17 and the manual lever 12 are fastened by a threaded engagement. The cam 17 abuts against the cable outlet cover 8, and the surface of the cable outlet cover 8 that abuts against the cam 17 is a planar structure. When the planar part of the cam 17 abuts against the cable outlet cover 8, the pin body 11 is locked in the released state.

[0027] The yoke assembly includes a yoke body 3, a coil 5, and a rear end cover 7. The coil 5 is installed inside the yoke body 3 and located outside the iron core 4. The rear end cover 7 is sleeved on the pin shaft and located between the yoke body 3 and the wire outlet cover 8. The rear end cover 7 includes an extension section 15 located between the pin shaft and the coil 5. A spring body 6 is located between the shaft end section 13 and the extension section 15. The coil 5 is a double coil structure including a large resistance coil 5 and a small resistance coil 5.

[0028] A dust cover 2 is fitted onto the pin body 11. The dust cover 2 is installed on the yoke 3 by screws. A sealing groove 1 is opened on the end face of the dust cover 2 near the pin body 11, and a sealing groove 2 is opened on the end face of the output coil 5 near the wiring section. A sealing ring 1 is provided in both the sealing groove 1 and the sealing groove 2. Both the sealing groove 1 and the sealing groove 2 are annular grooves. The sealing ring 1 is an O-ring rubber ring. The sealing ring 1 enables the electromagnet to be effectively protected from dust and sand, and avoids jamming caused by internal dust.

[0029] In practical use, the energizing process of the pin electromagnet is as follows:

[0030] When the electromagnet coil 5 is not energized, the pin assembly is restricted to its initial position due to the constraint of the spring body 6;

[0031] When the electromagnet is energized and attracted, the normally closed contact of the limit switch 10 short-circuits the large resistance coil, and the current only flows through the small resistance coil. Therefore, the current is large, generating a large electromagnetic attraction. The electromagnet pin assembly moves from the initial position to the attracted position. When this process is close to the end of the stroke, the ramp surface of the energized section in the pin shaft will press the roller of the limit switch 10 and drive the spring to connect the limit switch 10. The normally closed contact of the limit switch 10 is opened, and the current flows through the small resistance coil and the large resistance coil. Therefore, the current is significantly reduced. However, the electromagnetic force at this time can still overcome the reaction force of the spring body 6 and keep the iron core 4 of the electromagnet in the attracted position.

[0032] When the electromagnet is de-energized and released, the electromagnetic attraction disappears, and the electromagnet's core 4 returns from the attracted position to the initial position by the restoring force of the spring body.

[0033] like Figure 1 , Figure 3 As shown, the manual release process of the pin electromagnet is as follows: Manually pull up and rotate the manual lever 12. The manual lever 12 will drive the cam 17 to rotate, thereby pulling the pin assembly to move towards the rear end of the electromagnet. When pressed... Figure 3 When the manual lever 12 is rotated to 90 degrees in the F direction, the plane of the cam 17 engages with the plane of the cable outlet cover 8, keeping the electromagnet in the disengaged state. The plane of the cable outlet cover 8 is as follows: Figure 3 As shown at point S in the middle.

[0034] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A pin electromagnet with manual release locking function, characterized in that, The assembly includes a yoke assembly and a pin assembly, with the pin assembly installed within the yoke assembly. The pin assembly includes an iron core (4), a pin body (11), and a pin shaft, with the iron core (4) located between the pin body (11) and the pin shaft. The pin shaft includes a contact section (14) on the side away from the iron core (4) and a shaft end section (13) located between the iron core (4) and the contact section (14), with a spring body (6) fitted on the shaft end section (13). The contact section (14) is located outside the yoke assembly. The energized section (14) is provided with a wire outlet cover (8), and a limit switch (10) is provided inside the wire outlet cover (8). The end of the energized section (14) away from the shaft end section (13) is connected to a release rod assembly located outside the wire outlet cover (8). The outer wall of the energized section (14) is a sloping surface structure. The release rod assembly can drive the pin shaft to extend and retract to open or close the limit switch (10) through the outer wall structure of the energized section (14) and lock the release state of the pin body (11).

2. The latch electromagnet with manual release locking function according to claim 1, characterized in that, The release lever assembly includes a cam (17) and a pin (16) for connecting the cam (17) and the electrical contact section (14) in the pin shaft; a cotter pin (18) is provided on the pin (16), and a manual lever (12) is connected to the cam (17).

3. The latch electromagnet with manual release locking function according to claim 2, characterized in that, The cam (17) abuts against the wire outlet cover (8), and the surface of the wire outlet cover (8) abutting against the cam (17) is a planar structure; when the planar part of the cam (17) abuts against the wire outlet cover (8), the pin body (11) is locked in a released state.

4. The latch electromagnet with manual release locking function according to claim 1, characterized in that, The limit switch (10) includes a spring with an elastic pulley. The pulley can roll on the outer wall of the energized section (14). When the slope of the energized section (14) moves to the pulley, the energized section (14) presses the pulley and drives the spring to connect the limit switch (10).

5. The latch electromagnet with manual release locking function according to claim 1, characterized in that, The cable outlet cover (8) is provided with an electrical connector (9), which is electrically connected to the lead wire of the yoke assembly and the limit switch (10).

6. The latch electromagnet with manual release locking function according to claim 1, characterized in that, The yoke assembly includes a yoke body (3), a coil (5) and a rear end cover (7). The coil (5) is installed inside the yoke body (3) and located outside the iron core (4). The rear end cover (7) is sleeved on the pin shaft and located between the yoke body (3) and the wire outlet cover (8).

7. The latch electromagnet with manual release locking function according to claim 6, characterized in that, The rear end cover (7) includes an extension section (15) located between the pin shaft and the coil (5), and a spring body (6) is disposed between the shaft end section (13) and the extension section (15).

8. The latch electromagnet with manual release locking function according to claim 6, characterized in that, The coil (5) is a double coil (5) structure including a large resistance coil (5) and a small resistance coil (5).

9. The latch electromagnet with manual release locking function according to claim 1, characterized in that, A dust cover (2) is fitted onto the pin body (11), and the dust cover (2) is installed on the yoke body (3) by screws.

10. The latch electromagnet with manual release locking function according to claim 9, characterized in that, A sealing groove 1 is provided on the end face of the dust cover (2) near the pin body (11), and a sealing groove 2 is provided on the end face of the coil (5) near the wiring section. Both sealing groove 1 and sealing groove 2 are provided with sealing rings (1).

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