Emergency manual release brake device of direct current motor

Abstract

The utility model discloses an emergency manual release brake device for a direct current motor, which relates to the technical field of motor brakes and comprises a motor, the motor comprises a shell, a shaft lever is movably connected to the inner side of the shell, and a rear end cover and a fan cover are respectively arranged at the ends of the shell. The end of the shaft rod penetrates through the rear end cover and extends to the inner side of the fan cover, and a bearing is arranged between the shaft rod and the rear end cover in an interference fit mode. A brake is arranged on the inner side of the fan cover and movably connected with the shaft rod, a sliding groove is formed in the fan cover, and a handle bolt is arranged on the inner side of the sliding groove in a penetrating mode. The release ring at the end of the handle bolt is connected with the armature plate through the release bolt and the hexagonal locking nut, the other end of the handle bolt penetrates through the fan cover and extends to the outer side, the release handle at the end of the handle bolt is pulled, the armature plate is driven to be separated from the brake disc through the release ring, and workers can conveniently and manually release the brake.

Description

Technical Field

[0001] This utility model specifically relates to the field of motor brake technology, and more specifically to an emergency manual release brake device for DC motors. Background Technology

[0002] The emergency manual release brake of a DC motor is a method of manually releasing the motor braking state in emergency situations or under specific conditions. The distance between the armature plate and the electromagnet is called the working air gap. The normal working air gap does not exceed the specified maximum working air gap value. The motor is adjusted within the initial working air gap range when it leaves the factory.

[0003] However, in practice, it has been noted that due to the presence of the brake, it is relatively difficult to rotate the output shaft during maintenance. The air cover needs to be removed to release the brake before rotating the output shaft. This process is cumbersome and takes a long time. Furthermore, after the motor has been running for a period of time, the air gap increases due to wear of the friction plates, which affects the normal engagement and braking effect of the brake. The air gap needs to be checked by disassembling the motor, which makes the testing and adjustment process time-consuming. Utility Model Content

[0004] The purpose of this invention is to provide an emergency manual release brake device for a DC motor. A handle bolt passing through the shroud moves the armature plate, allowing for manual separation of the brake disc from the armature plate. Conversely, moving the handle bolt manually stops the motor. The distance the handle bolt travels indicates whether the air gap is within a reasonable range, thus increasing usability. This addresses the technical problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A DC motor emergency manual release brake device includes a motor, the motor includes a housing, a shaft is movably connected to the inside of the housing, the ends of the housing are respectively provided with a rear end cover and a fan cover, the end of the shaft extends through the rear end cover to the inside of the fan cover, and a bearing is interference-fitted between the shaft and the rear end cover.

[0007] A brake is provided inside the wind cover, and the brake is movably connected to the shaft. A slide groove is provided on the wind cover, and a handle bolt is provided through the inside of the slide groove. A release handle and a release ring are fixedly connected to both ends of the handle bolt, and the release ring is fixedly connected to the brake.

[0008] The brake includes a spline bushing sleeved on a shaft, and keyways are respectively provided between the spline bushing and the shaft. A flat key is placed in the keyway, and the spline bushing is fixedly connected to the shaft through the flat key (6).

[0009] The release ring is sleeved on the outside of the armature plate, and a release bolt is provided at the connection between the armature plate and the release ring. The end of the release bolt passes through the armature plate and the release ring and is threadedly connected to the hexagonal lock nut.

[0010] As a further technical solution of this utility model, a brake disc is slidably connected to the outer side of the spline bushing, and an armature plate and an electromagnet are provided on the side of the brake disc away from the rear end cover, with the armature plate located between the electromagnet and the brake disc.

[0011] As a further technical solution of this utility model, the electromagnet is provided with a receiving groove on the side near the armature plate, and a braking spring is placed in the receiving groove. One side of the braking spring is in contact with the receiving groove, and the other side is in contact with the side of the armature plate.

[0012] As a further technical solution of this utility model, the electromagnet is provided with hexagonal socket bolts in a ring array, and the ends of the hexagonal socket bolts pass through the electromagnet and the armature plate and are threaded to the rear end cover. A spring washer is placed on the side of each hexagonal socket bolt near the electromagnet.

[0013] As a further technical solution of this utility model, each of the aforementioned hexagon socket bolts is provided with a support and adjustment sleeve on the side near the rear end cover. The end of the support and adjustment sleeve passes through the armature plate and is threadedly connected to the side of the electromagnet. The support and adjustment sleeve is slidably connected to the outer side of the hexagon socket bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this utility model, the release ring at the end of the handle bolt is connected to the armature plate through the release bolt and the hexagonal locking nut, and the other end of the handle bolt extends through the wind cover to the outside. Pulling the release handle at the end of the handle bolt will cause the armature plate to separate from the brake disc through the release ring, making it convenient for the operator to manually release the brake.

[0016] This invention determines the movement distance of the armature plate by pulling the handle bolt, thereby judging the distance between the armature plate and the electromagnet, which facilitates the staff to quickly check the air flow between the armature plate and the electromagnet. Attached Figure Description

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

[0018] Figure 2 This utility model Figure 1 A partial structural diagram.

[0019] In the picture:

[0020] Support adjusting screw sleeve-1, brake disc-2, first retaining ring-3, bearing-4, spline bushing-5, flat key-6, hex head screw-7, flat washer-8, return spring-9, armature plate-10, rear end cover-11, fan cover-12, handle bolt-13, release handle-14, release ring-15, electromagnet-16, fan-17, release bolt-18, hex lock bolt-19, second retaining ring-20, brake spring-21, internal hex bolt-22, spring washer-23. 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] Please see Figure 1-2 This utility model provides an emergency manual release brake device for a DC motor, including a motor, the motor including a housing, a shaft movably connected to the inner side of the housing, a rear end cover 11 and a fan cover 12 respectively provided at the ends of the housing, the end of the shaft extending through the rear end cover 11 to the inner side of the fan cover 12, and a bearing 4 is interference-fitted between the shaft and the rear end cover 11.

[0023] A brake is provided inside the wind cover 12, and the brake is movably connected to the shaft. A slide groove is provided on the wind cover 12, and a handle bolt 13 is provided through the inside of the slide groove. A release handle 14 and a release ring 15 are fixedly connected to both ends of the handle bolt 13, and the release ring 15 is fixedly connected to the brake.

[0024] The brake includes a spline bushing 5 sleeved on a shaft, and keyways are respectively opened between the spline bushing 5 and the shaft. A flat key 6 is placed in the keyway, and the spline bushing 5 is fixedly connected to the shaft through the flat key 6.

[0025] In this embodiment, a brake disc 2 is slidably connected to the outer side of the spline bushing 5. An armature plate 10 and an electromagnet 16 are provided on the side of the brake disc 2 away from the rear end cover 11, and the armature plate 10 is located between the electromagnet 16 and the brake disc 2.

[0026] By adopting the above technical solution, the rotation of the shaft causes the spline bushing 5 and the brake disc 2 to rotate via the flat key 6, and the brake disc 2 can slide axially on the outside of the spline bushing 5.

[0027] In this embodiment, the electromagnet 16 is provided with a storage groove on the side near the armature plate 10, and a brake spring 21 is placed in the storage groove. One side of the brake spring 21 is in contact with the storage groove, and the other side is in contact with the side of the armature plate 10.

[0028] In this embodiment, the electromagnet 16 is provided with hexagonal socket bolts 22 in a ring array, and the ends of the hexagonal socket bolts 22 pass through the electromagnet 16 and the armature plate 10 and are threadedly connected to the rear end cover 11. A spring washer 23 is placed on the side of each hexagonal socket bolt 22 near the electromagnet 16.

[0029] By adopting the above technical solution, the electromagnet 16 loses its electromagnetic attraction after being de-energized. At this time, the brake spring 21 in the side groove of the electromagnet 16 is released, pushing the armature plate 10 to move closer to the brake disc 2 and pushing the brake disc 2 to move to the left. The brake disc 2 is decelerated by the squeezing between the armature plate 10 and the rear end cover 11.

[0030] In this embodiment, each of the internal hex bolts 22 is provided with a support and adjustment sleeve 1 on the side near the rear end cover 11. The end of the support and adjustment sleeve 1 passes through the armature plate 10 and is threadedly connected to the side of the electromagnet 16. The support and adjustment sleeve 1 is slidably connected to the outer side of the internal hex bolt 22.

[0031] In this embodiment, the release ring 15 is sleeved on the outside of the armature plate 10, and a release bolt 18 is provided at the connection between the armature plate 10 and the release ring 15. The end of the release bolt 18 passes through the armature plate 10 and the release ring 15 and is threadedly connected to the hexagonal lock nut 19.

[0032] By adopting the above technical solution, the handle bolt 13 is moved by the release handle 14, and the release ring 15 at the end of the handle bolt 13 drives the armature plate 10 to move closer to the electromagnet 16. The distance between the armature plate 10 and the electromagnet 16 can be determined based on the movement distance of the release handle 14, thereby determining whether the air pressure between the armature plate 10 and the electromagnet 16 needs to be adjusted.

[0033] In this embodiment, the brake disc 2 is disposed between the armature plate 10 and the rear end cover 11, and a first retaining spring 3 is provided on the side of the connection between the brake disc 2 and the shaft, and the first retaining spring 3 is engaged with the outside of the shaft.

[0034] In this embodiment, a fan 17 is provided on the side of the electromagnet 16 away from the armature plate 10. The fan 17 is screwed to the end of the shaft, and a second retaining spring 20 is provided on the side where the fan 17 is connected to the shaft, and the second retaining spring 20 is engaged with the end of the shaft.

[0035] In this embodiment, the armature plate 10 is also provided with hexagonal head screws 7, and each hexagonal head screw 7 is respectively fitted with a flat washer 8 and a return spring 9. Specific Implementation Example

[0036] Hold the release handle 14 at the end of the handle bolt 13 and move it to the right. The handle bolt 13 drives the armature plate 10 to move closer to the electromagnet 16 through the release ring 15. The size of the air gap is determined by the distance the release handle 14 moves.

[0037] When the air gap is not within the specified range, remove the fan cover 12, then loosen the hex bolt 22, rotate the support adjusting screw sleeve 1, and screw the support adjusting screw sleeve 1 in the direction of the electromagnet to adjust the air gap. Then, place the selected feeler gauge into the air gap next to the support adjusting bolt, and slowly screw the hex bolt 22 in until the end of the hex bolt 22 presses against the feeler gauge, thereby adjusting the air gap.

[0038] The working principle of this utility model is as follows: When the motor rotates, the electromagnet 16 is energized. After being energized, the electromagnet 16 generates an electromagnetic attraction that drives the armature plate 10 to move closer to the electromagnet 16, causing the armature plate 10 to separate from the brake disc 2. The shaft drives the brake disc 2 to rotate. When the motor is de-energized, the electromagnet 16 loses its electromagnetic attraction. At this time, the brake spring 21 in the electromagnet 16 pushes the armature plate 10 to move closer to the brake disc 2. After the armature plate 10 is in contact with the surface of the brake disc 2, the friction force decelerates the brake disc 2, causing the brake disc 2 to stop quickly. When the operator holds the release handle 14 and pulls the handle bolt 13 to the right, the release ring 15 at the end of the handle bolt 13, through the release bolt 18 and the hexagonal locking nut 19, drives the armature plate 10 to move closer to the electromagnet 16, causing the armature plate 10 to separate from the brake disc 2, thus achieving manual release. Continue pulling the armature plate 10 until the side of the armature plate 10 is in contact with the electromagnet 16. The movement distance of the handle bolt 13 is used to determine whether the air gap is within a reasonable range. The structure is simple, the operation is very convenient, and it effectively reduces the intensity of manual labor.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An emergency manual release brake device for a DC motor, characterized in that: The motor includes a housing, a shaft is movably connected to the inside of the housing, and a rear end cover (11) and a fan cover (12) are respectively provided at the ends of the housing. The end of the shaft extends through the rear end cover (11) to the inside of the fan cover (12), and a bearing (4) is interference-fitted between the shaft and the rear end cover (11). A brake is provided inside the wind cover (12), and the brake is movably connected to the shaft. A slide groove is provided on the wind cover (12), and a handle bolt (13) is provided through the inside of the slide groove. A release handle (14) and a release ring (15) are fixedly connected to both ends of the handle bolt (13), and the release ring (15) is fixedly connected to the brake. The brake includes a spline bushing (5) sleeved on a shaft, and keyways are respectively provided between the spline bushing (5) and the shaft, and a flat key (6) is placed in the keyway. The spline bushing (5) is fixedly connected to the shaft through the flat key (6). The release ring (15) is sleeved on the outside of the armature plate (10), and a release bolt (18) is provided at the connection between the armature plate (10) and the release ring (15). The end of the release bolt (18) passes through the armature plate (10) and the release ring (15) and is threadedly connected to the hexagonal lock nut (19).

2. The emergency manual release brake device for a DC motor according to claim 1, characterized in that: The outer side of the spline bushing (5) is slidably connected to a brake disc (2). The brake disc (2) is provided with an armature plate (10) and an electromagnet (16) on the side away from the rear end cover (11), and the armature plate (10) is located between the electromagnet (16) and the brake disc (2).

3. The emergency manual release brake device for a DC motor according to claim 2, characterized in that: The electromagnet (16) has a receiving groove on the side near the armature plate (10), and a brake spring (21) is placed in the receiving groove. One side of the brake spring (21) is in contact with the receiving groove, and the other side is in contact with the side of the armature plate (10).

4. The emergency manual release brake device for a DC motor according to claim 3, characterized in that: The electromagnet (16) is provided with hexagonal bolts (22) in a ring array, and the end of the hexagonal bolts (22) passes through the electromagnet (16) and the armature plate (10) and is threaded to the rear end cover (11). A spring washer (23) is placed on the side of each hexagonal bolt (22) near the electromagnet (16).

5. The emergency manual release brake device for a DC motor according to claim 4, characterized in that: Each of the aforementioned hexagon socket bolts (22) is provided with a support adjusting screw sleeve (1) on the side near the rear end cover (11). The end of the support adjusting screw sleeve (1) passes through the armature plate (10) and is threadedly connected to the side of the electromagnet (16). The support adjusting screw sleeve (1) is slidably connected to the outer side of the hexagon socket bolt (22).

Images