Permanent magnet and coil combined braking device

Abstract

The utility model discloses a kind of permanent magnet and coil combined brake device, including power shaft assembly flange body and the combined structure body matched with power shaft assembly flange body, the brake working surface A of power shaft assembly flange body is connected with brake friction disc by leaf spring, the brake working surface B of combined structure body is embedded and is installed with the brake anchor friction plate of brake friction disc mutual friction brake cooperation;Permanent magnet is installed in combined structure body inside with brake friction disc mutual magnetic force attraction, combined structure body inside is also installed with coil assembly for canceling permanent magnet magnetic force under energized state.The utility model is under normal condition through permanent magnet magnetic force attraction brake friction disc and brake anchor friction plate contact and rub brake;When releasing brake, coil assembly is energized, coil assembly generates magnetic field and cancels permanent magnet magnetic force and releases brake, power shaft and matched assembly can rotate normally.

Description

Technical Field

[0001] This utility model relates to a braking device, and more particularly to a braking device combining a permanent magnet and a coil. Background Technology

[0002] A braking device is a braking structure for a rotor or power shaft. When the rotor or power shaft rotates, the braking action of the device reduces its speed to zero and maintains braking. Currently, some braking devices directly use electromagnetic coils to form an electromagnet that electromagnetically attracts the armature mounted on the rotor to achieve braking. When the electromagnetic coil is not energized, the braking is released; frictional braking only occurs when the electromagnetic coil is energized. Maintaining the braking state requires continuous energization of the electromagnetic coil, which is not conducive to effective braking. Therefore, some braking devices are designed to be in a braking state when the electromagnetic coil is not energized, and to switch the braking state by using an electromagnet formed by the electromagnetic coil to attract the armature and release the brake. In this case, the electromagnetic coil is usually located on the rotor, resulting in a more complex layout. Therefore, innovative structural designs for braking devices are needed to effectively achieve the switching between braking and release. Utility Model Content

[0003] The purpose of this invention is to provide a combined permanent magnet and coil braking device. During normal operation, the coil assembly is energized, generating a magnetic field that counteracts the magnetic force of the permanent magnet. The brake friction disc moves away from the brake armature friction pad, releasing the brake. At this time, the power shaft and rotor components can rotate normally. When braking is required, the coil assembly is de-energized, and no magnetic field is generated. The permanent magnet's magnetic force attracts the brake friction disc, which then tightly contacts the brake armature friction pad for frictional braking. After braking is complete, the brake friction disc remains attracted by the permanent magnet's magnetic force, maintaining the braking state between the brake friction disc and the brake armature friction pad.

[0004] The objective of this utility model is achieved through the following technical solution: A combined permanent magnet and coil braking device includes a power shaft mounting flange and a combined structure that mates with the power shaft mounting flange. The power shaft mounting flange has a braking working surface A, and the combined structure has a braking working surface B that mates with the braking working surface A. The braking working surface A is connected to a brake friction disc via a leaf spring, and the braking working surface B of the combined structure is inlaid with a brake armature friction pad that rubs against the brake friction disc. A permanent magnet that magnetically attracts the brake friction disc is installed inside the combined structure, and a coil assembly for counteracting the magnetic force of the permanent magnet when energized is also installed inside the combined structure.

[0005] To better realize this utility model, the combined structure is formed by internally and externally connecting a structural slot and a mating structure. A coil mounting cavity is formed between the structural slot and the mating structure, and the coil assembly is correspondingly assembled in the coil mounting cavity. The structural slot and the mating structure each have an inlay recess for embedding and mounting a brake armature friction plate. The brake armature friction plate is correspondingly and fixedly installed in the inlay recess. The inlay recess is located in the middle of the brake working surface B, and the brake armature friction plate protrudes a portion of the brake working surface B in the height direction.

[0006] Preferably, the braking working surface A of the power shaft assembly flange has a corresponding leaf spring inlay groove, and the leaf spring is fitted and connected in the leaf spring inlay groove of the braking working surface A.

[0007] Preferably, a brake friction disc movement space is formed between the brake working surface A of the power shaft assembly flange and the brake working surface B of the combined structure, and the height of the brake friction disc movement space is H1 higher than the height of the brake friction disc.

[0008] Preferably, the structural slot is formed by a side panel A and a transverse plate A to form an L-shaped structure, and the mating structure is formed by a side panel B and a transverse plate B to form an L-shaped structure. The transverse plate A of the structural slot and the transverse plate B of the mating structure are connected internally and externally. The side panel A of the structural slot, the transverse plate A, and the side panel B of the mating structure together form the coil mounting cavity.

[0009] Preferably, a magnet mounting base is installed between the transverse plate A of the structural slot and the transverse plate B of the mating structure, and the permanent magnet is embedded in the magnet mounting base.

[0010] Preferably, the middle part of the power shaft assembly flange has a power shaft sleeve that extends into the middle of the combined structure for rotational engagement, and the power shaft sleeve has a power shaft hole.

[0011] Preferably, the power shaft assembly flange is fitted with fastening screws placed in the power shaft hole.

[0012] Preferably, the transverse plate A of the structural slot, the transverse plate B of the mating structure, and the magnet mounting base are fixedly connected as a single structure by screws.

[0013] The working principle of this utility model is as follows: When the coil assembly is not energized, the coil assembly does not generate a magnetic field and does not counteract the magnetic force of the permanent magnet. The magnetic force of the permanent magnet attracts the brake friction disc and tightly adheres to the brake armature friction pad for friction braking. When the coil assembly is energized, the coil assembly generates a magnetic field and counteracts the magnetic force of the permanent magnet. The permanent magnet no longer magnetically attracts the brake friction disc, and the brake friction disc moves away from the brake armature friction pad and releases the brake.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model is applied to a rotor or power shaft. During normal operation, the coil assembly is energized, generates a magnetic field, and cancels the magnetic force of the permanent magnet. The brake friction disc moves away from the brake armature friction pad and releases the brake. At this time, the power shaft and rotor components can rotate normally. When braking is required, the coil assembly is de-energized, does not generate a magnetic field, and the magnetic force of the permanent magnet attracts the brake friction disc and makes it tightly adhere to the brake armature friction pad for friction braking. After braking is completed, the brake friction disc is continuously attracted by the magnetic force of the permanent magnet, and the brake friction disc and brake armature friction pad remain in a braking state.

[0015] (2) Under normal conditions, the present invention uses the magnetic force of the permanent magnet to attract the brake friction disc and the brake armature friction pad to contact and rub against each other, and the leaf spring is in a stretched state. When the brake is released, the coil assembly is energized, the coil assembly generates a magnetic field and cancels the magnetic force of the permanent magnet and releases the brake. The leaf spring returns to a free state, pulls the armature away from the friction pad and releases the brake, and the power shaft and supporting components can rotate normally. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 2 A partial structural diagram of the composite structure; Figure 4 This is a schematic diagram of the structure of this utility model under normal braking conditions; Figure 5 This is a schematic diagram of the structure of this utility model during brake release.

[0017] The names corresponding to the reference numerals in the attached figures are as follows: 1 - Fastening screw, 2 - Power shaft assembly flange, 21 - Power shaft hole, 22 - Braking working surface A, 3 - Leaf spring, 4 - Brake disc, 5 - Structural groove, 6 - Coil assembly, 7 - Magnet mounting base, 8 - Permanent magnet, 9 - Mating structure, 10 - Brake armature friction plate, 11 - Coil mounting cavity. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments: Example

[0019] like Figures 1-5 As shown, a permanent magnet and coil combined braking device includes a power shaft mounting flange 2 and a combined structure that mates with the power shaft mounting flange 2. This embodiment of the permanent magnet and coil combined braking device takes braking of a power shaft as an example. Figure 2 As shown, the power shaft assembly flange 2 has a power shaft sleeve that extends into and rotatably engages with the middle of the combined structure. The power shaft sleeve has a power shaft hole 21. Preferably, the power shaft assembly flange 2 is fitted with a fastening screw 1 located in the power shaft hole 21. Figure 2 , Figure 3 As shown, the combined structure has a hollow assembly structure in the middle corresponding to the power shaft sleeve; the power shaft assembly flange 2 and the combined structure are not installed vertically, but are installed according to the actual application (providing greater flexibility), for example, the combined structure is located above the power shaft assembly flange 2, or the power shaft assembly flange 2 and the combined structure are arranged horizontally or right-left. The power shaft assembly flange 2 has a braking working surface A22 (see...). Figure 2 The power shaft assembly flange 2, excluding the power shaft sleeve, has an end seat, the surface of which forms the braking working surface A22. The combined structure has a braking working surface B that mates with the braking working surface A22 (see...). Figure 2 The surface of the combined structure opposite to the braking working surface A22 is the braking working surface B, and the braking working surface B and the braking working surface A22 are fitted with the brake friction disc 4).

[0020] like Figure 2 , Figure 4 , Figure 5 As shown, the braking working surface A22 is connected to the brake friction disc 4 via a leaf spring 3 (when the permanent magnet 8 magnetically attracts the brake disc 4 and brake armature friction pad 10 for braking, the leaf spring 3 is in an elastic tension state; when the coil assembly 6 is energized, the coil assembly 6 generates a magnetic field and cancels the magnetic force of the permanent magnet 8, the permanent magnet 8 no longer magnetically attracts the brake friction disc 4, and the brake friction disc 4 moves away from the brake armature friction pad 10 and releases the brake under the elastic restoring force of the leaf spring 3). The braking working surface B of the combined structure is inlaid with a brake armature friction pad 10 that rubs and brakes with the brake friction disc 4. During braking operation, the brake armature friction pad 10 contacts and rubs against the brake friction disc 4, at which time the leaf spring 3 is in an elastic tension state. A brake friction disc movement space is formed between the braking working surface A22 of the power shaft mounting flange 2 and the braking working surface B of the combined structure. The height of the brake friction disc movement space is H1 higher than the height of the brake friction disc 4 (e.g., ...). Figure 2 As shown, the brake friction disc 4 can move up and down within the brake friction disc's movable space.

[0021] like Figure 2As shown, a permanent magnet 8 is installed inside the combined structure, which magnetically attracts the brake friction disc 4. The permanent magnet 8 magnetically attracts the brake friction disc 4, causing it to move and contact the brake armature friction pad 10 for friction braking. A coil assembly 6 is also installed inside the combined structure to counteract the magnetic force of the permanent magnet 8 when energized. When energized, the coil assembly 6 generates a magnetic field and counteracts the magnetic force of the permanent magnet 8. When the coil assembly 6 is not energized, it does not generate a magnetic field and does not counteract the magnetic force of the permanent magnet 8. The permanent magnet 8 magnetically attracts the brake friction disc 4 and tightly contacts the brake armature friction pad 10 for friction braking. When the coil assembly 6 is energized, it generates a magnetic field and counteracts the magnetic force of the permanent magnet 8. The permanent magnet 8 no longer magnetically attracts the brake friction disc 4, and the brake friction disc 4 moves away from the brake armature friction pad 10 under the elastic restoring force of the leaf spring 3, releasing the brake.

[0022] like Figure 3 As shown, the combined structure is formed by the external and internal connection of the structural slot 5 and the mating structure 9, with a coil mounting cavity 11 formed between the structural slot 5 and the mating structure 9. The coil assembly 6 is correspondingly assembled in the coil mounting cavity 11. The structural slot 5 and the mating structure 9 each have an inlay recess for mounting the brake armature friction plate 10 (see [reference]). Figure 3 The inlaid recessed groove is a groove on the top of the combined structure. The brake armature friction plate 10 is fixedly installed in the inlaid recessed groove. The inlaid recessed groove is located in the middle of the brake working surface B. The brake armature friction plate 10 protrudes a part of the brake working surface B in the height direction. That is, the friction contact surface of the brake armature friction plate 10 protrudes a part of the brake working surface B. In this way, the brake armature friction plate 10 can effectively contact the brake friction disc 4 and perform friction braking.

[0023] In some embodiments, the braking working surface A22 of the power shaft assembly flange 2 is provided with a corresponding leaf spring inlay groove, and the leaf spring 3 is fitted and connected in the leaf spring inlay groove of the braking working surface A22.

[0024] In some embodiments, such as Figure 2 , Figure 3 As shown, the structural slot 5 is an L-shaped structure composed of side panel A and transverse plate A, and the mating structure 9 is an L-shaped structure composed of side panel B and transverse plate B. The transverse plate A of the structural slot 5 and the transverse plate B of the mating structure 9 are connected internally and externally. The side panel A, transverse plate A of the structural slot 5, and side panel B of the mating structure 9 form a coil mounting cavity 11. A magnet mounting base 7 is installed between the transverse plate A of the structural slot 5 and the transverse plate B of the mating structure 9, and a permanent magnet 8 is embedded in the magnet mounting base 7. The transverse plate A of the structural slot 5, the transverse plate B of the mating structure 9, and the magnet mounting base 7 are fixedly connected as a single structure by screws.

[0025] In use, the power shaft is fitted into the power shaft hole 21 and secured with the fastening screw 1. The power shaft, power shaft mounting flange 2, leaf spring 3, and brake disc 4 then rotate as a whole (the whole is a rotor assembly). The combined structure formed by the structural slot 5 and the mating structure 9 remains stationary, while the rotor assembly rotates relative to the combined structure. During normal operation, the coil assembly 6 is energized, generating a magnetic field that cancels the magnetic force of the permanent magnet 8. The permanent magnet 8 no longer attracts the brake friction disc 4, causing the brake friction disc 4 to move away from the brake armature friction pad 10 and release the brake (e.g., ...). Figure 5 As shown, there is a gap space between the brake friction disc 4 and the brake armature friction pad 10, and the gap space is as follows: Figure 5 (marked H6), at this time the power shaft and rotor components can rotate normally. When braking is required, the coil assembly 6 is de-energized (i.e., not powered), the coil assembly 6 does not generate a magnetic field, the permanent magnet 8 magnetically attracts the brake friction disc 4 and tightly contacts the brake armature friction pad 10 for friction braking, at this time the leaf spring 3 is in a stretched state, the brake friction disc 4 and the brake armature friction pad 10 are in contact (as shown in the H6 marking), at this time the power shaft and rotor components can rotate normally. When braking is required, the coil assembly 6 is de-energized (i.e., not powered), the coil assembly 6 does not generate a magnetic field, the permanent magnet 8 magnetically attracts the brake friction disc 4 and tightly contacts the brake armature friction pad 10 for friction braking, at this time the leaf spring 3 is in a stretched state, the brake friction disc 4 and the brake armature friction pad 10 are in contact (i.e., as shown in the H6 Figure 4 As shown, at this time, there is a gap space between the brake friction disc 4 and the brake working surface A22, and the gap space is as follows: Figure 4 (H4 is marked). After braking is completed, the brake friction disc 4 is continuously attracted by the magnetic force of the permanent magnet 8, keeping the brake friction disc 4 and the brake armature friction pad 10 in a braking state (without external power supply).

[0026] 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 and improvements 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 combined permanent magnet and coil braking device, characterized in that: The device includes a power shaft mounting flange and a combined structure that mates with the power shaft mounting flange. The power shaft mounting flange has a braking working surface A, and the combined structure has a braking working surface B that mates with the braking working surface A. The braking working surface A is connected to a brake friction disc via a leaf spring, and the braking working surface B of the combined structure is inlaid with a brake armature friction pad that rubs against the brake friction disc. The combined structure contains a permanent magnet that magnetically attracts the brake friction disc, and also contains a coil assembly for counteracting the magnetic force of the permanent magnet when energized.

2. The permanent magnet and coil combined braking device according to claim 1, characterized in that: The combined structure is formed by internally and externally connecting a structural slot and a mating structure. A coil mounting cavity is formed between the structural slot and the mating structure, and the coil assembly is correspondingly assembled in the coil mounting cavity. The structural slot and the mating structure each have an inlay recess for embedding and mounting a brake armature friction plate. The brake armature friction plate is correspondingly and fixedly installed in the inlay recess. The inlay recess is located in the middle of the brake working surface B, and the brake armature friction plate protrudes a portion of the brake working surface B in the height direction.

3. The permanent magnet and coil combined braking device according to claim 1, characterized in that: The braking working surface A of the power shaft assembly flange has a corresponding leaf spring inlay groove, and the leaf spring is fitted and connected in the leaf spring inlay groove of the braking working surface A.

4. The permanent magnet and coil combined braking device according to claim 1, characterized in that: A brake friction disc movement space is formed between the brake working surface A of the power shaft assembly flange and the brake working surface B of the combined structure. The height of the brake friction disc movement space is H1 higher than the height of the brake friction disc.

5. A permanent magnet and coil combined braking device according to claim 2, characterized in that: The structural slot is composed of a side panel A and a transverse plate A forming an L-shaped structure. The mating structure is composed of a side panel B and a transverse plate B forming an L-shaped structure. The transverse plate A of the structural slot is connected internally and externally to the transverse plate B of the mating structure. The side panel A of the structural slot, the transverse plate A, and the side panel B of the mating structure together form the coil mounting cavity.

6. The permanent magnet and coil combined braking device according to claim 5, characterized in that: A magnet mounting base is installed between the transverse plate A of the structural slot and the transverse plate B of the mating structure, and the permanent magnet is embedded in the magnet mounting base.

7. The permanent magnet and coil combined braking device according to claim 1, characterized in that: The power shaft assembly flange has a power shaft sleeve that extends into the middle of the combined structure for rotational engagement, and the power shaft sleeve has a power shaft hole.

8. A permanent magnet and coil combined braking device according to claim 7, characterized in that: The power shaft assembly flange is fitted with fastening screws placed in the power shaft hole.

9. A permanent magnet and coil combined braking device according to claim 6, characterized in that: The transverse plate A of the structural slot, the transverse plate B of the mating structure, and the magnet mounting base are fixedly connected as a whole structure by screws.

10. A permanent magnet and coil combined braking device according to claim 1, characterized in that: When the coil assembly is not energized, it does not generate a magnetic field and does not counteract the magnetic force of the permanent magnet. The magnetic force of the permanent magnet attracts the brake friction disc and makes it fit tightly against the brake armature friction pad for friction braking. When the coil assembly is energized, it generates a magnetic field and counteracts the magnetic force of the permanent magnet. The permanent magnet no longer attracts the brake friction disc, and the brake friction disc moves away from the brake armature friction pad and releases the brake.

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