Zero dead zone fixed angle of rotation electromagnet

Abstract

The application relates to the technical field of electromagnets, in particular to a zero-dead-zone fixed-rotation-angle electromagnet, which comprises a shell, a stopper, a coil support, a coil group, an armature, a transmission shaft and a limiting block. The limiting block is arranged in the assembly gap of the inner side of the coil support and the stopper tooth, and the limiting block is matched with the armature tooth and the stopper tooth through the limiting steps at the upper end and the lower end, so that the armature can be stably supported and accurately limited after the electromagnet is powered off, the assembly gap and the shaking space of the armature are completely eliminated, the rotation dead zone problem of the traditional electromagnet is effectively solved, and the control precision and the repeated positioning precision of the fixed-angle rotation are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of electromagnet technology, specifically to a zero-dead-zone constant rotation angle electromagnet mainly used in the aerospace field. Background Technology

[0002] The rotary electromagnet is an important driving device in a solenoid valve. Its rotation enables the opening, closing, and reversing of hydraulic oil flow. If the rotary electromagnet has a dead zone, it cannot drive the solenoid valve to rotate under low voltage, causing malfunction. Similarly, for solenoid valves with precise angle control, if the electromagnet's rotation angle is too large or too small, it will cause angle detection failure in the detection unit, thus preventing the solenoid valve from functioning properly. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a zero-dead-zone fixed-angle electromagnet. By setting a limiting block inside the coil support and within the assembly gap of the stop teeth, the limiting block engages with the armature teeth and the stop teeth respectively through limiting steps at its upper and lower ends. This allows for stable support and precise positioning of the armature after the electromagnet is de-energized, completely eliminating the assembly gap and wobbling space of the armature. This effectively solves the rotational dead zone problem of traditional electromagnets and significantly improves the control accuracy and repeatability of fixed-angle rotation.

[0004] To achieve the above objectives, the embodiments of the present invention specifically adopt the following technical solution: a zero-dead-zone constant rotation angle electromagnet, comprising: The housing, used to hold the various components; The stop blocks are located at both ends of the housing and serve a sealing function. The inner side of the stop blocks is provided with teeth. The coil support is located between two stop blocks and is coaxially distributed with the housing. A coil assembly is installed on the outer wall. The armature has a drive shaft passing through the middle and armature teeth arranged around it; The limiting block is located on the inner wall of the coil support and supports the armature after power is cut off.

[0005] As a further improvement to the above technical solution: The number of the stopper teeth and the armature teeth are both multiple, and they are all evenly distributed along the circumference of the shell.

[0006] An assembly gap is reserved between two adjacent stop teeth, and the limiting block is installed in the assembly gap.

[0007] The upper part of the limiting block is provided with a limiting step one that cooperates with the armature teeth, and the lower part is provided with a limiting step two that cooperates with the stop teeth.

[0008] The first limiting step and the second limiting step are located at the two ends of the limiting block, respectively.

[0009] There are two limiting blocks, both of which are distributed on the radius of the shell.

[0010] The armature has a through hole in the middle, and a keyway is provided on the inner side wall of the through hole. The drive shaft has a connecting key in the middle.

[0011] A limiting plate is provided in the middle of the drive shaft, located above the armature.

[0012] An air gap is reserved between the armature and the stop.

[0013] The beneficial effects of this invention are as follows: The zero-dead-zone fixed-rotation angle electromagnet includes a housing, a stop, a coil support, a coil assembly, an armature, a transmission shaft, and a limiting block. By setting a limiting block inside the coil support and within the assembly gap of the stop teeth, the limiting block engages with the armature teeth and the stop teeth respectively through limiting steps at its upper and lower ends. This allows for stable support and precise positioning of the armature after the electromagnet is de-energized, completely eliminating the assembly gap and wobbling space of the armature, effectively solving the rotation dead zone problem of traditional electromagnets, and significantly improving the control accuracy and repeatability of fixed-angle rotation. The structure adopts a symmetrical arrangement of double limit blocks, combined with a circumferentially distributed tooth structure, which makes the armature subjected to force and limit evenly and stably, eliminating the problem of unilateral deviation. At the same time, the armature and the drive shaft are synchronously transmitted through the cooperation of keyway and connecting key, and the axial limit plate limits the movement, avoiding axial and circumferential displacement deviation, resulting in strong structural stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of the stop iron in this invention; Figure 4 This is a schematic diagram of the coil support structure in this invention; Figure 5 This is a schematic diagram of the armature assembly in this invention; Figure 6 This is a schematic diagram of the installation structure of the transmission in the invention; Figure 7 This is a schematic diagram of the keyway structure in this invention.

[0015] In the diagram: 1. Housing; 2. Stop; 3. Stop teeth; 4. Coil bracket; 5. Coil assembly; 6. Armature; 7. Drive shaft; 8. Armature teeth; 9. Limiting block; 10. Assembly gap; 11. Limiting step one; 12. Limiting step two; 13. Through hole; 14. Keyway; 15. Connecting key; 16. Limiting plate; 17. Air gap. Detailed Implementation

[0016] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0017] like Figure 1-7 As shown, this embodiment provides a zero-dead-zone fixed rotation angle electromagnet, including a housing 1, a stop 2, a coil support 4, a coil group 5, an armature 6, a transmission shaft 7, and a limiting block 9.

[0018] Two stop blocks 2 are provided, fixedly installed at both ends of the housing 1, to seal and protect the internal structure of the housing 1, preventing dust and impurities from entering and affecting the transmission and electromagnetic working performance. Each of the two stop blocks 2 has multiple stop block teeth 3 on its inner end face, evenly distributed along the circumference of the housing 1 to ensure uniform distribution of the electromagnetic magnetic field. A rectangular assembly gap 10 is reserved between adjacent stop block teeth 3 to provide installation space for the limit block 9.

[0019] The coil support 4 is assembled between the two stop blocks 2, and the coil support 4, housing 1, and stop blocks 2 are coaxially distributed to ensure the coaxial accuracy of the overall structure. The outer wall of the coil support 4 is fixedly wound or assembled with a coil group 5. When the coil group 5 is energized, it can generate a directional electromagnetic driving force to drive the armature 6 to complete a certain angle rotation.

[0020] The armature 6 is arranged inside the coil support 4, between the two stoppers 2. Multiple armature teeth 8 are integrally formed around the armature 6, and these teeth are evenly distributed along the circumference. The armature teeth 8 correspond and cooperate with the stopper teeth 3 to achieve stable transmission of electromagnetic torque. A drive shaft 7 is threaded through the center of the armature 6, serving as the power output end for transmitting rotational power outwards.

[0021] The limiting block 9 is fixedly installed on the inner side wall of the coil bracket 4 and embedded in the assembly gap 10 of the armature petal teeth 3. The upper part of the limiting block 9 is provided with a limiting step 11 and the lower part is provided with a limiting step 12. The limiting step 11 and the limiting step 12 are located at the upper and lower ends of the limiting block 9, respectively. The limiting step 11 is fitted with the side wall of the armature petal teeth 8, and the limiting step 12 is fitted with the side wall of the blocking petal teeth 3. The limiting block 9 can prevent the armature petal from falling into the assembly gap between the blocking petal teeth when the power is off, thus preventing the electromagnet from being unable to start due to the dead zone. Meanwhile, the two-step design can support and limit the armature and stop when the power is off. At the same time, it can also utilize the cooperation between the armature and the limit step to obtain the maximum torque at the moment of power-on, improve the response speed of the solenoid valve, and reduce the pressure reduction required when opening, making it more suitable for the aerospace and aviation fields.

[0022] In this embodiment, two limiting blocks 9 are provided, both distributed on the radius of the housing 1, forming a bidirectional symmetrical limiting structure. The distance between the two limiting blocks can be changed according to specific needs, so that the included angle between the axes of the two limiting blocks conforms to the usage scenario, thereby limiting the rotation angle of the armature. This avoids dead zones while limiting the rotation angle, reducing the complexity of the angle displacement sensor design, and even eliminating the angle displacement sensor altogether. When this electromagnet is applied to a product, it can improve the accuracy of angle control and significantly reduce production costs.

[0023] The armature 6 has a through hole 13 in the middle, and a keyway 14 is provided on the inner side wall of the through hole 13. The drive shaft 7 has a connecting key 15 integrally formed in the middle. The connecting key 15 and the keyway 14 are interference-fitted to achieve circumferential fixation of the drive shaft 7 and the armature 6, ensuring that the drive shaft 7 can be driven to rotate synchronously when the armature 6 rotates, and eliminating the problems of circumferential slippage and angular deviation.

[0024] A limiting plate 16 is fixedly installed in the middle of the drive shaft 7. The limiting plate 16 is located above the armature 6. The axial position of the armature 6 is limited by the limiting plate 16 to prevent the armature 6 from moving axially during operation, thereby further ensuring the operational stability of the overall structure.

[0025] An air gap 17 is reserved between the armature 6 and the stop 2 at both ends. The air gap 17 provides room for the rotation of the armature 6, avoids direct contact between the armature 6 and the stop 2 to prevent mechanical friction, reduces wear of parts, ensures the normal function of the electromagnetic field, improves electromagnetic drive efficiency, and extends the service life of the equipment.

[0026] The working principle of this invention is as follows: When the coil group 5 is energized, it generates an electromagnetic torque, which drives the armature 6 to overcome resistance and complete the rotation at a preset fixed angle. The rotational power is output outward through the transmission shaft 7. When the coil group 5 is de-energized, the electromagnetic torque disappears and the armature 6 is reset. At this time, the limiting block 9 on the inner side of the coil bracket 4 closely cooperates with the armature teeth 8 and the stop teeth 3 at the upper and lower ends, respectively, to provide precise support and limit for the armature 6, completely eliminating the fit gap and rotation dead zone of the armature 6, ensuring that the armature 6 is accurately reset and without shaking, and realizing zero dead zone fixed angle rotation control.

[0027] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0030] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A zero-dead-zone constant-rotation-angle electromagnet, characterized in that, include: The housing (1) is used to house the various components; The stop iron (2) is located at both ends of the housing (1) and serves as a seal. The inner side is provided with stop iron teeth (3). The coil support (4) is located between the two stop blocks (2) and is coaxially distributed with the housing (1). A coil group (5) is provided on the outer wall. The armature (6) has a drive shaft (7) passing through its center and armature teeth (8) arranged around its perimeter. The limiting block (9) is located on the inner wall of the coil support (4) and supports the armature (6) after power is cut off.

2. The zero-dead-zone constant rotation angle electromagnet according to claim 1, characterized in that, The number of the stopper teeth (3) and the armature teeth (8) are both multiple, and they are all evenly distributed along the circumference of the shell (1).

3. The zero-dead-zone constant rotation angle electromagnet according to claim 2, characterized in that, An assembly gap (10) is reserved between two adjacent stop teeth (3), and the limiting block (9) is installed in the assembly gap (10).

4. The zero-dead-zone constant rotation angle electromagnet according to claim 3, characterized in that, The upper part of the limiting block (9) is provided with a limiting step one (11) that works in conjunction with the armature flap tooth (8), and the lower part is provided with a limiting step two (12) that works in conjunction with the stop flap tooth (3).

5. The zero-dead-zone constant rotation angle electromagnet according to claim 4, characterized in that, The first limiting step (11) and the second limiting step (12) are located at the two ends of the limiting block (9), respectively.

6. The zero-dead-zone constant rotation angle electromagnet according to claim 5, characterized in that, The number of the limiting blocks (9) is two, and they are both distributed on the radius of the shell (1).

7. The zero-dead-zone constant rotation angle electromagnet according to claim 1, characterized in that, The armature (6) has a through hole (13) in the middle, and a keyway (14) is provided on the inner side wall of the through hole (13). The drive shaft (7) has a connecting key (15) in the middle.

8. The zero-dead-zone constant rotation angle electromagnet according to claim 7, characterized in that, A limiting plate (16) is provided in the middle of the drive shaft (7) above the armature (6).

9. The zero-dead-zone constant rotation angle electromagnet according to claim 1, characterized in that, An air gap (17) is reserved between the armature (6) and the stop (2).

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