Low speed scenario deadened electromagnetic brake assembly

Abstract

The application relates to the technical field of electromagnetic braking and discloses a low-speed scene noise-eliminating electromagnetic braking assembly, which comprises a base, an iron core with a coil embedded in an armature block, a lifting groove reserved at the top of the iron core and the armature block after assembly, a ladder-shaped through hole arranged at the central axis of the iron core, a fixing bolt sleeved with a reset spring penetrating through the ladder-shaped through hole and finally screwed and fixed with the base so as to elastically compress the iron core and the armature block on the base, a damping brake piece floatingly arranged at the end port of the lifting groove and used for releasing the impact force instantaneously generated by the iron core and the armature block under the action of magnetic attraction, and a floating cavity formed by the damping brake piece, the armature block and the iron core. The application can realize small-area contact braking and large-area magnetic attraction braking simultaneously, so as to eliminate the vibration and noise caused by the impact force.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic braking technology, and in particular to an electromagnetic braking component that can reduce noise when energized and engaged in low-speed operation scenarios. Background Technology

[0002] Electromagnetic braking technology has become widespread and has a wide range of applications, including transportation, industry, food, and medicine. However, in many applications, whether braking at high or low speeds, a common technical problem remains unsolved: a strong magnetic force is instantly generated during both energized and de-energized braking (this force translates into impact force when applied to the electromagnetic brake). Under this magnetic force, the electromagnetic brake instantly engages with a moving or relatively moving magnetically attached object, resulting in vibration and noise. Clearly, the larger the mass of the electromagnetic brake, the larger the contact area, and the stronger the magnetic force, the more pronounced the vibration and noise during instantaneous engagement. However, a larger magnetic force, a larger contact area, and a larger electromagnetic brake mass are necessary for better electromagnetic braking performance. Currently, the technical shortcomings regarding vibration and noise during electromagnetic braking engagement remain unresolved. Therefore, this invention provides an electromagnetic braking component that can reduce noise during energized engagement in low-speed operating scenarios. Summary of the Invention

[0003] In order to address the shortcomings of existing technologies that generate vibration and noise when energized and engaged in low-speed operating scenarios, this invention provides a noise-absorbing electromagnetic braking component for low-speed scenarios, thereby solving the problems of existing technologies.

[0004] The technical solution provided by this invention is:

[0005] The low-speed scene noise-absorbing electromagnetic braking component includes an electromagnetic brake body that generates a strong magnetic attraction force when energized, and a magnetically attracted moving body that needs to be braked by the electromagnetic brake body.

[0006] The electromagnetic brake has a base, which is a right-angled iron piece with ear plates at both ends for reinforcement. The inner sides of the ear plates have fixing holes. An iron core with a coil is supported on the base between the two fixing holes. The iron core is embedded in an armature block. After the iron core and armature block are embedded, a lifting groove is pre-formed at the top of both. A stepped through hole is formed at the central axis of the iron core. A fixing bolt, connected to a return spring, passes through the stepped through hole and is finally screwed into the base, thus elastically pressing the iron core and armature block against the base. The base is fixed to the target object through the fixing holes and also needs to support the other components of the electromagnetic brake, restricting the electromagnetic brake to only move up and down.

[0007] Of course, the base can have other forms, such as using a single plate from existing technology, which has a slide rail, guide post, or other limiting means to constrain the electromagnetic brake to move only up and down. However, this invention uses a single bolt to constrain the iron core and armature block, and uses right-angle iron parts to constrain their rotational dynamics in the horizontal direction, which can achieve rapid engagement and reduce the possibility of mechanical interference.

[0008] Secondly, a damping brake pad is floating at the port of the aforementioned lifting groove. The damping brake pad, armature block, and iron core together form a floating cavity. That is, the damping brake pad only floats up and down within the floating cavity, thereby releasing the impact force generated instantaneously by the iron core and armature block under the action of magnetic attraction when the damping brake pad comes into instantaneous contact with the magnetic moving body.

[0009] By implementing the above technical solution, this invention achieves rapid and instantaneous attraction by first using small-area contact braking and then supplementing it with large-area magnetic attraction braking, thereby eliminating vibration and noise caused by instantaneous impact force.

[0010] As a preferred floating design structure for the aforementioned damping brake pad, the damping brake pad is a floating plate with a flexible rubber layer. Stepped through holes are formed at both ends of the floating plate. Corresponding to the positions of the stepped through holes, stepped blind holes are formed on the iron core. A floating bolt passes through the stepped through holes, sleeves an adjusting washer and a spacer spring, and is then screwed into the stepped blind hole. The floating plate and the flexible rubber layer can be arranged in layers or wrapped around each other. The floating bolt will float up and down relative to the floating plate within the stepped through holes. Furthermore, the sum of the compressed elastic forces of the return spring and the spacer spring is less than or equal to the magnetic attraction force of the electromagnetic brake body, thus not affecting the damping braking effect and promoting soft contact between the floating plate and the magnetically moving body.

[0011] As a further optimization, when the damping brake pad is compressed after contacting the magnetic moving body, its protrusion above the armature block surface is 0.5-2mm. The advantage of this design is that it uses a small area of ​​damping brake pad for instantaneous contact braking, supplemented by a large area of ​​non-contact magnetic braking. Compared with the full-area instantaneous contact braking of existing technologies, this can eliminate vibration and noise.

[0012] As a preferred auxiliary means to eliminate vibration and noise, a rubber air cushion can be provided in the area where the magnetic moving body and the electromagnetic braking body are attracted. That is, a rubber air cushion is provided in the entire area where there is an attraction, to help the damping brake pad release the impact force generated instantaneously by the iron core and armature block under the action of magnetic attraction. The most preferred thickness of the rubber air cushion is 1.5-2.5mm. Within this thickness range, the phenomenon of the center of the rubber air cushion being suspended due to the length of the rubber air cushion can be avoided.

[0013] The following two structures are preferred for the aforementioned rubber air cushion:

[0014] Firstly, there is a bubble-type rubber air cushion. The four sides of the contact surface between the rubber air cushion and the magnetic moving body are adhesive, while the rest of the rubber air cushion is provided with several concave spherical surfaces at intervals. The other side of the concave spherical surface is convex bubble-shaped. In the length direction of the rubber air cushion, there is an air channel between two adjacent concave spherical surfaces, and a slow-speed air nozzle is provided on the air channel near the concave spherical surface.

[0015] Secondly, the air strip type rubber air cushion has an adhesive part around the contact surface between the rubber air cushion and the magnetic moving body. The rest of the rubber air cushion is provided with several concave strips at intervals, and the other side of the concave strips is in the form of a raised air strip. In the length direction of the rubber air cushion, there is an air channel between two adjacent concave strips, and a slow-speed air nozzle is provided on the air channel near the concave strip.

[0016] In the above scheme, both the bubble-type rubber air cushion and the air bar-type rubber air cushion can slowly release the air bubbles or the normal pressure air in the air bar into the direction of weaker pressure through the air passage via the slow-speed air nozzle when they make instantaneous contact with the damping brake pad and armature block. Then, under the action of strong magnetic attraction, they slowly tend to flatten, while maintaining effective braking force, further improving the effect of eliminating vibration and noise.

[0017] As a preferred mating structure for the aforementioned iron core and armature block, the iron core has a U-shaped metal outer shell, and within the U-shaped metal shell is a T-shaped core plate for winding the coil, with the U-shaped metal shell and the T-shaped core plate integrally formed. The horizontal cross-section of the armature block is racetrack-shaped, and corresponding to the shape of the iron core, the armature block has a central through hole for embedding the T-shaped core plate and a recess for embedding the U-shaped metal outer shell. The advantage of this design is that the iron core and armature block have high overall strength, a simple and compact structure, fast magnetic transmission, and are suitable for placement in confined spaces. Obviously, other mating structures of iron core and armature block that conform to the concept of this invention can also achieve the expected effects of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the base structure;

[0020] Figure 3 This is a schematic diagram of the armature block structure;

[0021] Figure 4 This is a schematic diagram of the iron core structure;

[0022] Figure 5 A schematic diagram of the assembly structure of the base, iron core, and armature block;

[0023] Figure 6 for Figure 1 Sectional view along the middle AA direction;

[0024] Figure 7 This is a schematic diagram showing the changing states of the electromagnetic brake during the lifting phase.

[0025] Figure 8 A schematic diagram showing the changing states of the electromagnetic brake during the braking phase.

[0026] Figure 9 This is a rear view of a bubble-type rubber air cushion.

[0027] Figure 10 for Figure 9 The right view;

[0028] Figure 11 This is a rear view of an air spring type rubber air cushion;

[0029] Figure 12 for Figure 11 The right view;

[0030] Figure 13 This is a schematic diagram of a state when an electromagnetic brake body is braked with a bubble-type rubber air cushion.

[0031] Figure 14 This is a schematic diagram of the second state when the electromagnetic brake body is braked by the bubble-type rubber air cushion.

[0032] Figure 15 This is a schematic diagram of the third state when the electromagnetic brake body is braked with a bubble-type rubber air cushion.

[0033] In the picture:

[0034] 1. Electromagnetic braking element;

[0035] 10. Base; 11. Ear plate; 12. Fixing hole;

[0036] 20. Iron core; 21. U-shaped metal outer shell; 22. T-shaped core plate; 23. Coil; 24. Fixing bolt; 25. Return spring; 26. Stepped blind hole;

[0037] 30. Armature block; 31. Central through hole; 32. Recess;

[0038] 40. Damping brake pads; 41. Flexible rubber layer; 42. Floating plate; 43. Floating bolt; 44. Adjustable shim; 45. Fixed-distance spring;

[0039] 50. Rubber air cushion; 51. Adhesive part; 52. Concave spherical surface; 53. Concave strip surface; 54. Air passage; 55. Slow-speed air nozzle;

[0040] 60. Lifting groove; 61. Floating cavity. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0042] like Figures 1 to 15 The low-speed scene noise-absorbing electromagnetic braking assembly shown includes an electromagnetic brake body 1 that generates a strong magnetic attraction force when energized, and a magnetically moving body that needs to be braked by the electromagnetic brake body 1. The electromagnetic brake body 1 includes a base 10, an iron core 20, an armature block 30, and a damping brake pad 40 located on the iron core 20 and the armature block 30. The magnetically moving body is equipped with a rubber air cushion 50, which, together with the damping brake pad 40, releases the instantaneous impact force generated by the iron core 20 and the armature block 30 under the action of magnetic attraction, thereby better eliminating vibration and noise.

[0043] like Figure 1 and Figure 2 In the embodiment shown, the base 10 is a right-angled iron piece, that is, an iron piece with two mutually perpendicular sides. The two ends of the right-angled iron piece are reinforced with ear plates 11, and the inner side of the two ear plates 11 is provided with fixing holes 12 for fixing the right-angled iron piece.

[0044] like Figure 1 , Figure 3 , Figure 4 and Figure 5 In the illustrated embodiment, the iron core 20 has a U-shaped metal outer shell 21, and a T-shaped core plate 22 for winding the coil 23 is provided inside the U-shaped metal outer shell 21. The U-shaped metal outer shell 21 and the T-shaped core plate 22 are integrally formed. The armature block 30 has a racetrack-shaped horizontal cross-section, and a central through hole 31 for embedding the T-shaped core plate 22 and a recess 32 for embedding the U-shaped metal outer shell 21 are provided on the armature block 30 corresponding to the shape of the iron core 20. After the iron core 20 and the armature block 30 are embedded, a lifting groove 60 is reserved at the top of the central through hole 31 where the two meet, and a stepped through hole is provided at the central axis of the iron core 20. A fixing bolt 24 sleeves a return spring 25 through the stepped through hole and finally screws it into the base 10 for fixation, thereby elastically pressing the iron core 20 and the armature block 30 onto the base 10 between the two fixing holes 12. This invention uses a single bolt to constrain the iron core 20 and the armature block 30, and a right-angled iron piece to constrain their rotational dynamics in the horizontal direction, which can achieve rapid engagement and reduce the possibility of mechanical interference. At the same time, the preferred embedding structure of the iron core 20 and the armature block 30 has the advantages of high overall strength, simple and compact structure, fast magnetic transmission, and suitability for placement in confined spaces.

[0045] like Figure 5 and Figure 6In the specific embodiment shown, a damping brake pad 40 is floatingly disposed at the port of the aforementioned lifting groove 60. This damping brake pad 40 is a floating plate 42 with a flexible rubber layer 41. Stepped through holes are formed at both ends of the floating plate 42. A stepped blind hole 26 is formed on the iron core 20 corresponding to the position of the stepped through hole. A floating bolt 43 passes through the stepped through hole, sleeves an adjusting washer 44 and a spacer spring 45, and is then screwed into the stepped blind hole 26. The floating plate 42 and the flexible rubber layer 41 can be arranged in layers or wrapped around each other. The floating bolt 43 will float up and down relative to the floating plate 42 within the stepped through hole. Simultaneously, the damping brake pad 40, armature block 30, and iron core 20 together form a floating cavity 61. This means the damping brake pad 40 only floats up and down within the floating cavity 61, thus releasing the instantaneous impact force generated by the iron core 20 and armature block 30 under magnetic attraction when the damping brake pad 40 makes instantaneous contact with the magnetically attracted moving body. Furthermore, the sum of the compressed elastic forces of the aforementioned return spring 25 and distance spring 45 is less than or equal to the magnetic attraction force of the electromagnetic brake body 1, thus not affecting the damping braking effect and promoting soft contact between the floating plate 42 and the magnetically attracted moving body.

[0046] The electromagnetic braking body 1 of the present invention has two changing states during specific implementation: one is, as shown in the figure. Figure 7 The diagram shows the lifting stage of the iron core 20 and armature block 30. At this time, under the action of strong magnetic attraction, the iron core 20 lifts the armature block 30 and together compresses the return spring 25 to separate from the base 10, and moves towards the magnetically attracted moving body; secondly, as... Figure 8 During the magnetic braking stage, the damping brake pad 40 contacts the magnetically moving body to begin braking. Simultaneously, the spacer spring 45 is compressed and, together with the return spring 25, provides a reaction force to the iron core 20 and the armature block 30, initiating the damping state until the magnetic braking ends. This invention uses a single bolt to constrain the iron core 20 and the armature block 30. For the purpose of rapid, instantaneous engagement, it first uses a small-area contact braking, then supplements it with a large-area magnetic braking, thereby eliminating vibration and noise caused by the instantaneous impact force. In this embodiment, it is more preferable that after the damping brake pad 40 contacts the magnetically moving body and is compressed, the thickness of the adjusting shim 44 is changed so that the damping brake pad 40 protrudes from the surface of the armature block 30 by 0.5-2mm. The purpose is to use a small-area damping brake pad 40 for instantaneous contact braking, supplemented by a large-area, non-contact magnetic braking, which can better eliminate vibration and noise compared to the full-area instantaneous contact braking of the prior art.

[0047] like Figures 9 to 12In the specific embodiment shown, a rubber air cushion 50 can be provided within the area where the magnetic moving body and the electromagnetic braking body 1 are attracted. That is, a rubber air cushion 50 is provided within the entire area where there is an attraction, to assist the damping brake pad 40 in releasing the impact force instantaneously generated by the iron core 20 and the armature block 30 under the action of magnetic attraction. The most preferred thickness of the rubber air cushion 50 is 1.5-2.5mm. Within this thickness range, the phenomenon of its center drooping due to the length of the rubber air cushion 50 can be avoided.

[0048] Regarding the preferred structure of the aforementioned rubber air cushion 50, two specific embodiments are provided: one, as shown in the figure. Figure 9 and Figure 10 The bubble-type rubber air cushion 50 shown has an adhesive portion 51 around its contact surface with the magnetic moving body, while the remaining portion of the rubber air cushion 50 is provided with several concave spherical surfaces 52 at intervals. The other side of each concave spherical surface 52 is a raised bubble shape. Along the length of the rubber air cushion 50, an air channel 54 is provided between two adjacent concave spherical surfaces 52, and a slow-speed air nozzle 55 is provided on the air channel 54 near the concave spherical surface 52. Secondly, as... Figure 11 and Figure 12 The air-strip type rubber air cushion 50 shown has an adhesive portion 51 around its contact surface with the magnetic moving body. The remaining portion of the air cushion 50 is provided with several concave strip surfaces 53 at intervals, with the other side of each concave strip surface 53 forming a raised air strip shape. Along the length of the air cushion 50, an air channel 54 is provided between two adjacent concave strip surfaces 53, and a slow-release air nozzle 55 is provided on the air channel 54 near the concave strip surface 53. In this embodiment, both the bubble-type and air-strip type rubber air cushions 50 can, upon instantaneous contact with the damping brake pad 40 and armature block 30, slowly release air bubbles or atmospheric pressure air from the air strip into the direction of weaker pressure via the air channel 54 through the slow-release air nozzle 55. This allows the air to gradually flatten under strong magnetic attraction, while maintaining effective braking force, further improving the effect of eliminating vibration and noise.

[0049] In the embodiment described above where the rubber air cushion 50 is supplemented with a damping brake pad 40, the spacing between the concave spherical surfaces 52 or concave strip surfaces 53 along the length of the rubber air cushion 50 is preferably 20-30 mm. This high-density layout, in addition to achieving shock absorption and noise reduction, provides the following unexpected braking effect:

[0050] Firstly, such as Figure 13 As shown, when the damping brake pad 40 is pressed against the rubber air cushion 50, the two ends of its armature block 30 may be partially pressed against the air bubbles on both sides, forming an embedded shape, thereby enhancing the braking effect.

[0051] Secondly, such as Figure 14As shown, when the damping brake pad 40 is pressed against the rubber air cushion 50, its armature block 30 is blocked by the air bubble at the traveling end of the magnetic moving body, thereby enhancing the braking effect.

[0052] Thirdly, such as Figure 15 As shown, when the damping brake pad 40 is pressed against the rubber air cushion 50, some air bubbles may be embedded in the stepped through holes on the damping brake pad 40, thereby enhancing the braking effect.

[0053] Of course, the above specific implementation method is only used to illustrate the bubble-type rubber air cushion 50. Obviously, the same situation will occur with the air strip-type rubber air cushion 50, which will not be described in detail here.

Claims

1. A low-speed scene noise-absorbing electromagnetic braking assembly, comprising an electromagnetic braking body and a magnetically attracted moving body being braked; characterized in that, The electromagnetic braking element includes: A base for fixing to the target object and supporting the remaining components of the electromagnetic brake, and for constraining the electromagnetic brake to move only up and down; An iron core with a coil is embedded in an armature block; after assembly, a lifting groove is reserved at the top of the iron core and the armature block; a stepped through hole is opened at the central axis of the iron core; A fixing bolt is connected to a reset spring, which passes through a stepped through hole and is finally screwed into the base for fixation, thereby elastically pressing the iron core and armature block onto the base; A damping brake pad is floatingly positioned at the port of the lifting groove to release the instantaneous impact force generated by the iron core and armature block under magnetic attraction; the damping brake pad, armature block and iron core together form a floating cavity.

2. The low-speed scene noise-absorbing electromagnetic braking component as described in claim 1, characterized in that: The damping brake pad is a floating plate with a flexible rubber layer. Stepped through holes are opened at both ends of the floating plate. Stepped blind holes are opened on the iron core at the corresponding positions of the stepped through holes. A floating bolt passes through the stepped through holes, sleeves the adjusting shim and the fixed distance spring, and is screwed into the stepped blind hole.

3. The low-speed scene noise-absorbing electromagnetic braking component as described in claim 2, characterized in that: The sum of the elastic forces of the return spring and the distance spring after compression is less than or equal to the magnetic attraction force of the electromagnetic brake.

4. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 1, characterized in that: After the damping brake pad contacts the magnetic moving body and is compressed, its height protruding from the surface of the armature block is 0.5-2mm.

5. The low-speed scene noise-absorbing electromagnetic braking assembly as described in any one of claims 1 to 4, characterized in that: A rubber air cushion is provided within the area where the magnetic moving body and the electromagnetic braking body are attracted.

6. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 5, characterized in that: The four periphery of the contact surface between the rubber air cushion and the magnetic moving body is an adhesive part, and the remaining part of the rubber air cushion is provided with a number of concave spherical surfaces at intervals; in the length direction of the rubber air cushion, an air channel is provided between two adjacent concave spherical surfaces, and a slow-speed air nozzle is provided on the air channel near the concave spherical surface.

7. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 5, characterized in that: The four periphery of the contact surface between the rubber air cushion and the magnetic moving body is an adhesive part, and the remaining part of the rubber air cushion is provided with several concave strips at intervals; in the length direction of the rubber air cushion, an air channel is provided between two adjacent concave strips, and a slow-speed air nozzle is provided on the air channel near the concave strip.

8. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 5, characterized in that: The thickness of the rubber air cushion is 1.5-2.5mm.

9. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 1, characterized in that: The iron core has a U-shaped metal shell, and a T-shaped core plate for winding the coil is provided inside the U-shaped metal shell. The U-shaped metal shell and the T-shaped core plate are integrally formed. The horizontal cross-section of the armature block is racetrack-shaped, and a central through hole for embedding the T-shaped core plate and a recess for embedding the U-shaped metal shell are provided on the armature block corresponding to the shape of the iron core.

10. The low-speed scene noise-absorbing electromagnetic braking assembly as described in claim 1, characterized in that: The base is a right-angled iron piece, and the two ends of the right-angled iron piece are reinforced with ear plates, and the inner side of the two ear plates is provided with fixing holes.

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