Electromagnetic pin puller with novel structure

Abstract

The utility model discloses an electromagnetic pin puller with a novel structure, and particularly relates to the technical field of electromagnetic pin pullers, the electromagnetic pin puller comprises an outer cylinder, a framework is coaxially arranged in the outer cylinder, a first coil is arranged on the framework, a second coil is arranged on one side of the first coil, a pin is inserted into one end of the framework, a guide sleeve is sleeved on the pin, and the guide sleeve is sleeved on the other end of the framework. A front end cover connected with the outer cylinder is arranged on the outer side of the guide sleeve, a rear end cover connected with the outer cylinder is inserted into the other end of the framework, and a spring is arranged between the pin and the rear end cover. According to the electromagnetic pin puller, the first coil generates large pin pulling force to enable the pin to be in place quickly, the second coil keeps the long-time attraction state of the pin, the problem that the pin pulling force, overload resistance and continuous working time of an existing electromagnetic pin puller are difficult to balance is solved, meanwhile, automatic reset of the pin is achieved, power-on connection is facilitated, and the electromagnetic pin puller has important practical value.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic pin puller technology, and more specifically, to a novel electromagnetic pin puller. Background Technology

[0002] An electromagnetic pin puller is a mechanism that uses the electromagnetic force generated by energizing a coil to drive the armature towards the yoke. This type of electromagnetic pin puller has advantages such as fast response speed, simple structure, and low cost, and is widely used in the electromechanical field, as well as in fuse and safety mechanisms.

[0003] The main electrical performance indicators of existing electromagnetic pin pullers include: pin pulling force, pin pulling stroke and response time, continuous operating time, resistance adaptability within the temperature range, and pin overload resistance. However, pin pulling force and pin overload resistance are contradictory; a higher pin overload resistance results in a lower initial driving force, while increasing the driving force inevitably sacrifices either pin overload resistance or continuous operating time. To meet the requirements for pin pulling force, pin overload resistance, and continuous operating time, the electromagnetic actuator is usually made very large. In practical operation, due to the high pin pulling force required, prolonged operation can cause the coil to overheat and deform, leading to damage.

[0004] Furthermore, existing technology incorporates a return spring between the armature and yoke. After the coil is de-energized, the return spring drives the armature to separate from the yoke, restoring the electromagnetic actuator to its original state. This type of actuator has drawbacks. For example, in certain applications, the electromagnetic puller needs to remain in the engaged state after the initial engagement. If existing electromagnetic pullers are to maintain this engaged state for an extended period, the coil needs continuous power supply. In this case, the coil will continuously heat up, eventually burning out.

[0005] Therefore, a new type of electromagnetic pin puller is needed that can maintain the engaged state for a long time without burning out the coil. To solve this problem, a novel electromagnetic pin puller structure is proposed. By winding coils of different wire diameters and numbers of turns in segments on the electromagnetic pin puller frame, the requirements for pin overload resistance and long-term continuous operation are met. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides a novel electromagnetic pin puller to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel electromagnetic pin puller, comprising an outer cylinder, a frame coaxially arranged inside the outer cylinder, a coil I arranged on the frame, a coil II arranged on one side of the coil I, a pin inserted into one end of the frame, a guide sleeve sleeved on the pin, a front end cap connected to the outer cylinder arranged on the outside of the guide sleeve, and a rear end cap connected to the outer cylinder inserted into the other end of the frame, and a spring arranged between the pin and the rear end cap.

[0008] Preferably, the frame includes an inner cylinder, a partition, a rear end plate, and a front end plate. The partition is provided in the middle of the inner cylinder, the rear end plate is provided on one side of the partition, and the front end plate is provided on the other side of the partition.

[0009] Preferably, the partition plate has a first wire hole, the top of the rear end plate has a second wire hole, the bottom of the rear end plate has a third wire hole, and the rear end cover has symmetrical through holes.

[0010] Preferably, the first coil is connected to a first wire body, and the second coil is connected to a second wire body.

[0011] Preferably, one end of the pin has a tapered structure and a first groove is provided at that end; one end of the rear end cover has a tapered groove and a second groove is provided at the bottom of the tapered groove; one end of the spring is located in the first groove and the other end of the spring is located in the second groove.

[0012] Preferably, both the first and second wires are connected to a DC regulated power supply.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By setting coil one and coil two on the frame, coil one is wound with a low-resistance, high-current heating element, which can generate a large pin-pulling force. Although a short-term power supply is required to prevent the coil from burning out, it can meet the initial large pin-pulling force requirement. Coil two is wound with a high-resistance, low-current heating element, which generates less heat and is convenient for long-term continuous power supply. First, both coils are energized simultaneously to make the pin retract into place against the spring. Then, the power supply to coil one is cut off, while coil two is kept energized. This allows the pin to remain in the attracted state for a long time, solving the problem of balancing pin-pulling force and continuous working time in the prior art.

[0015] 2. By opening wire holes and through holes on the partition plate, rear end plate and rear end cover of the skeleton, the first wire connected to coil one and the second wire connected to coil two can pass through according to a specific path, which facilitates the power connection between coil one and coil two. The reasonable circuit layout helps the electromagnetic pin puller to work stably.

[0016] 3. The pin has a tapered structure at one end with a first groove, and the rear end cover has a tapered groove and a second groove. The two ends of the spring are respectively placed in the grooves of the pin and the rear end cover. When the pin is pulled back by electromagnetic attraction, the spring is compressed. When the power is turned off and the electromagnetic attraction disappears, the spring returns to its original position and pushes the pin out to reset. The ingenious structural design ensures the continuity and repeatability of the electromagnetic pin puller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the exploded structure of the battery pin puller of this utility model.

[0020] The attached diagram is labeled as follows: 1. Outer cylinder; 2. Guide sleeve; 3. Rear end cover; 4. Front end cover; 5. Pin; 6. Spring; 7. Frame; 701. Inner cylinder; 702. Partition plate; 703. Rear end plate; 704. Front end plate; 8. Coil 1; 9. Coil 2; 10. First wire body; 11. Second wire body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figure 1-3 The novel electromagnetic pin puller shown includes an outer cylinder 1, a frame 7 coaxially arranged inside the outer cylinder 1, a coil 8 on the frame 7, a coil 9 on one side of the coil 8, a pin 5 inserted into one end of the frame 7, a guide sleeve 2 sleeved on the pin 5, a front end cover 4 connected to the outer cylinder 1 on the outside of the guide sleeve 2, a rear end cover 3 connected to the outer cylinder 1 inserted into the other end of the frame 7, and a spring 6 between the pin 5 and the rear end cover 3.

[0023] In practice, a small-resistance, high-current heating block is wound around coil 8, which can generate a large pulling force, but requires short-term power supply to prevent the coil from burning out; a large-resistance, small-current heating block is wound around coil 9, which generates less heat so that it can be supplied continuously for a long time.

[0024] Specifically, firstly, the coils with large and small resistances on the armature of the electromagnetic pin puller, namely coil 9 and coil 8, are simultaneously energized. After the pin 5 is subjected to a large electromagnetic attraction force, it overcomes the high overload and compresses the spring 6 to return to its original position. Then, the power supply to coil 8 is cut off, while coil 9 on the armature of the electromagnetic pin puller is kept continuously energized, keeping the pin 5 in the engaged state. After the power supply time of coil 9 meets the user's requirements, the power supply is cut off, the electromagnetic attraction force of the electromagnetic pin puller disappears, and the originally compressed spring 6 pushes the pin 5 out under the sliding guidance of the guide sleeve 2, restoring it to its original position before the pin is pulled out. To reuse the pin, simply repeat the above actions, thus meeting the user's requirements for large pin pulling force and long-term operation.

[0025] The frame 7 includes an inner cylinder 701, a partition 702, a rear end plate 703, and a front end plate 704. The partition 702 is provided in the middle of the inner cylinder 701, the rear end plate 703 is provided on one side of the partition 702, and the front end plate 704 is provided on the other side of the partition 702.

[0026] The partition plate 702 has a first wire hole, the rear end plate 703 has a second wire hole at the top, the rear end plate 703 has a third wire hole at the bottom, and the rear end cover 3 has symmetrical through holes.

[0027] The first coil 8 is connected to the first wire body 10, and the second coil 9 is connected to the second wire body 11.

[0028] In practice, the first wire 10 connected by coil 8 passes through the second wire hole and can be led out from a through hole on the rear cover 3. The second wire 11 connected by coil 9 passes through the first wire hole, then passes through the inside of coil 8, passes through the third wire hole, and finally leads out from another through hole on the rear cover 3, thus facilitating the electrical connection between coil 8 and coil 9.

[0029] One end of the pin 5 has a tapered structure and a first groove is provided at that end. One end of the rear cover 3 has a tapered groove and a second groove is provided at the bottom of the tapered groove. One end of the spring 6 is located in the first groove and the other end of the spring 6 is located in the second groove.

[0030] In practice, a spring 6 is connected between the pin 5 and the rear cover 3. When the pin 5 is subjected to electromagnetic attraction, it can retract and compress the spring 6. When the power is disconnected, the electromagnetic attraction disappears, causing the spring 6 to return to its original position and push the pin 5 out to reset.

[0031] Both the first line body 10 and the second line body 11 are connected to a DC regulated power supply.

[0032] In practice, the first wire 10 and the second wire 11, which are led out from the assembled electromagnetic pin puller, are connected to two sets of test clamps of the DC regulated power supply to ensure good contact. Then, the two DC regulated power supplies are started simultaneously. The energizing time of coil 1 8 is set to 1 second. After 1 second, the power is automatically cut off. Coil 1 8 generates a large pin-pulling force to overcome the spring 6 and pull the pin 5 into place. Coil 2 9 is set to be energized for the user's required working time. Coil 2 9 generates a pin-pulling force to overcome the resistance of the compressed spring 6 and the axial overload force of the product and pull the pin 5 into place. When the user's required working time is met, the power supply is automatically cut off. At this time, all power supplies to the electromagnetic pin puller are disconnected, the electromagnetic attraction disappears, and the originally compressed spring 6 pushes the pin 5 out to restore it to its original position before the pin is pulled out. To reuse the device, the above actions are repeated to achieve multiple reuses.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel electromagnetic pin puller, comprising an outer cylinder (1), characterized in that: A frame (7) is coaxially arranged inside the outer cylinder (1). A coil (8) is arranged on the frame (7). A coil (9) is arranged on one side of the coil (8). A pin (5) is inserted into one end of the frame (7). A guide sleeve (2) is sleeved on the pin (5). A front end cover (4) connected to the outer cylinder (1) is arranged on the outside of the guide sleeve (2). A rear end cover (3) connected to the outer cylinder (1) is inserted into the other end of the frame (7). A spring (6) is arranged between the pin (5) and the rear end cover (3).

2. The novel electromagnetic pin puller according to claim 1, characterized in that: The frame (7) includes an inner cylinder (701), a partition (702), a rear end plate (703), and a front end plate (704). The partition (702) is provided in the middle of the inner cylinder (701), the rear end plate (703) is provided on one side of the partition (702), and the front end plate (704) is provided on the other side of the partition (702).

3. The novel electromagnetic pin puller according to claim 2, characterized in that: The partition (702) has a first wire hole, the rear end plate (703) has a second wire hole at the top, the rear end plate (703) has a third wire hole at the bottom, and the rear end cover (3) has symmetrical through holes.

4. The novel electromagnetic pin puller according to claim 3, characterized in that: The first coil (8) is connected to the first wire body (10), and the second coil (9) is connected to the second wire body (11).

5. The novel electromagnetic pin puller according to claim 4, characterized in that: The pin (5) has a tapered structure at one end and a first groove at that end. The rear end cover (3) has a tapered groove at one end and a second groove at the bottom of the tapered groove. One end of the spring (6) is in the first groove and the other end of the spring (6) is in the second groove.

6. The electromagnetic pin puller according to claim 5, characterized in that: Both the first line body (10) and the second line body (11) are connected to a DC regulated power supply.

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