WO2021147576A1

WO2021147576A1 - Draft curtain brake mechanism

Info

Publication number: WO2021147576A1
Application number: PCT/CN2020/137089
Authority: WO
Inventors: 刘王雍杰; 吴国和
Original assignee: 福建安麟智能科技股份有限公司
Priority date: 2020-01-21
Filing date: 2020-12-17
Publication date: 2021-07-29
Also published as: CN211912498U

Abstract

Disclosed is a draft curtain brake mechanism. The draft curtain brake mechanism comprises an electric motor shaft (1), a brake disk (2) and a brake head (3), wherein the brake disk (2) comprises a force transmission portion (21) and a friction portion (22); the electric motor shaft (1) is inserted into the force transmission portion (21) and drives the brake disk (2) to rotate; the brake head (3) is located on one side of the friction portion (22); and the brake head (3) comprises a brake electromagnetic coil (31). In a normal state, the brake disk (2) rotates along with the electric motor shaft (1), and the brake disk (2) is kept in a moving state even when not being used, so that when the brake mechanism starts under emergency conditions, the brake disk (2) will not be stuck, and the brake mechanism starts smoothly and has a high stability.

Description

Smoke blocking vertical wall brake mechanism

Technical field

The invention relates to the technical field of smoke-blocking vertical walls, in particular to a smoke-blocking vertical wall brake mechanism.

Background technique

The smoke blocking wall is mainly used to block the spread of smoke. It is mainly used in high-rise or super high-rise shopping malls, office buildings, warehouses and other occasions. It can effectively block the horizontal flow of smoke under the building ceiling and help improve the emission in the smoke-proof zone. The smoke effect plays a positive role in ensuring the safety of people’s lives and property. , When there is no fire, the smoke blocking wall is in a suspended state; when a fire occurs, the motor will drive the motor shaft to rotate, and the motor shaft rotation will drive the smoke blocking wall to fall to prevent the spread of smoke, and its descending speed is also determined by the motor. Rotation speed is determined, no manual control is required. However, in an emergency situation, such as damage to the circuit after a fire occurs, and when power is not available, the motor cannot drive the motor shaft to rotate, and the smoke blocking wall drives the motor shaft to rotate and descend under the action of its own gravity. At this time, the smoke blocking wall The descending speed is in an uncontrolled state. If it descends too fast, it will cause the smoke blocking wall to collide with the ground and cause damage.

Chinese patent CN209545347U, publication date 2019-10-25 discloses an electric push rod with braking function. It includes a drive assembly, a brake assembly, a transmission assembly and a push rod assembly. The brake assembly includes a first housing, a fixed block arranged in the first housing, an electromagnetic coil connected to the fixed block through a guide post, and slides on the guide post And the movable block arranged between the fixed block and the electromagnetic coil, the compression spring arranged on the electromagnetic coil and between the electromagnetic coil and the movable block, the brake pads arranged between the movable block and the fixed block, and the brake pads are arranged in the brake pads. The connecting shaft block and the extension shaft connected with the connecting shaft block; this utility model, the brake assembly is energized while the drive assembly is moving, the fixed block and the sliding block release the brake pads without affecting the action of the push rod assembly; the drive assembly stops moving At the same time, the brake assembly is powered off, and the movable block and the fixed block compress the brake pads so that the brake pads cannot rotate, which can eliminate the influence of the inertia of the output shaft of the drive assembly on the movement accuracy of the push rod assembly. Since the braking function of the electric push rod is moved by the movable block, the movable block and the fixed block can compress the brake pads placed between the two. When braking is not required, the movable block will not move, so if If the brake function is not used for a long time, the movable block may rust and become stuck, and cannot move smoothly when the brake is required, resulting in the failure of the electric push rod brake.

Technical solutions

The invention provides a smoke blocking vertical wall brake mechanism, which can smoothly start in an emergency and has high stability.

In order to achieve the objective, the present invention adopts the following technical solutions:

A smoke-blocking vertical wall brake mechanism includes a motor shaft, a brake disc, and a brake head. The brake disc includes a force transmission part and a friction part. The motor shaft is inserted into the force transmission part and drives the brake disc to rotate. The brake head is located on one side of the friction part, and the brake head includes a brake electromagnetic coil.

As a preference, the end of the motor shaft is provided with a limiting body, the end of the motor shaft is provided with a limiting body, a spring is arranged between the force transmitting portion and the limiting body, and the spring is sleeved on the end of the motor shaft. The outer side of the motor shaft and the limiter body.

As a preference, the spring is a butterfly spring, and the axis of the disc spring coincides with the rotation axis of the motor shaft.

As a preference, the limiting body is a nut arranged at the end of the motor shaft, and the nut is a lock nut.

As a preference, the brake head includes an annular groove facing the brake disc, and the annular groove is disposed opposite to the end of the motor shaft.

As a preference, a driving surface for the motor shaft to drive the brake disc to rotate is provided on the force transmission portion, and a groove matching with the driving surface is provided on the motor shaft.

As a preference, a bearing is provided at the end of the motor shaft, and the motor shaft passes through the bearing.

As a preference, an end cover is provided on the outer side of the bearing, and the bearing is provided on the inner side of the end cover.

Preferably, a casing is provided on the outer side of the brake disc, and the casing and the brake disc are connected by screws.

As a preference, the groove is a strip-shaped groove, and the length of the groove is greater than the length of the driving surface.

In summary, compared with the prior art, the advantages of the present invention are:

(1) Under normal conditions, the brake disc rotates with the motor shaft. Since the brake disc remains in motion even when not in use, when the brake mechanism is activated in an emergency, there will be no brake disc jamming, so brake The structure can start smoothly at any time with high stability;

(2) The brake disc and the spring are positioned on the motor shaft through the limit body, and the limit body is set as an easy-to-detach nut to facilitate the installation of the spring and the brake disc and the removal of it for replacement.

(3) The brake disc and spring are positioned on the motor shaft through the limit body, and the limit body is set as an easy-to-detach nut to facilitate the installation of the spring and the brake disc and the removal of it for replacement.

(4) A lock nut can be used for the nut. By changing the tightening depth of the nut, the load on the brake disc through the spring can be changed, thereby changing the reaction speed of the brake disc.

(5) The power transmission part is provided with a first driving surface for powering the motor shaft to drive the brake disc to rotate, and the motor shaft is provided with a second driving surface that cooperates with the first driving surface. The length of the first driving surface is longer than the second driving surface. The length of the face. The two first driving surfaces are symmetrically arranged on both sides of the inside of the force transmission part, and two second driving surfaces are also symmetrically arranged on the motor shaft through the first driving surface on the force transmission part and the second driving surface on the motor shaft When the motor shaft rotates, the brake disc can be driven to rotate with it. The reason why the motor shaft and the force transmitting part are set as a flat structure is because the matching surface is a flat surface, which can transmit a larger load. When the motor shaft rotates, the brake disc is driven to rotate more stably, and the two first driving surfaces are symmetrically arranged on both sides of the inner side of the force transmission part, and the two second driving surfaces are also symmetrically arranged on the motor shaft, so that the motor shaft When the rotation drives the brake disc to rotate, the torsion force of the brake disc acting on the motor shaft is more even, and the whole structure is more stable.

Description of the drawings

Figure 1 is a schematic structural diagram of a smoke-blocking vertical wall brake mechanism according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of another installation method of a smoke blocking vertical wall brake mechanism according to an embodiment of the present invention;

Fig. 3 is an exploded view of the coordination of the brake disc and the motor shaft of a smoke-blocking vertical wall brake mechanism according to an embodiment of the present invention;

Figure 4 is an exploded view of another way of matching the brake disc and the motor shaft of a smoke-blocking vertical wall brake mechanism according to an embodiment of the present invention;

Fig. 5 is an exploded view of the cooperation between the brake head and the brake part of a smoke-blocking vertical wall brake mechanism according to an embodiment of the present invention.

The labels in the figure are as follows:

1. Motor shaft, 11. Limit body, 12. The second driving surface, 13. The second groove, 2. Brake disc, 21. Power Transmission Department, 211. The first groove, 212. The first driving surface, 213. Key strip, 22. The friction part, 23. Spring, 3. Brake head, 31. Brake solenoid, 32. Annular groove, 33. Shaft sleeve, 34. Brake part, 35. Protruding, 36. The third groove, 4. Bearing, 5. End cover, 6. Shell, 7. Motor housing.

Embodiments of the present invention

The present invention will be further described below in conjunction with the embodiments in the drawings.

A smoke-blocking vertical wall brake mechanism as shown in Figure 1 includes a motor shaft 1, a brake disc 2 and a brake head 3. The brake disc 2 includes a force transmitting portion 21 and a friction portion 22, and the motor shaft 1 is inserted into the force transmitting portion 21 And drive the brake disc 2 to rotate, the brake head 3 is located on the side of the friction part 22, and the brake head 3 includes a brake solenoid 31. The force transmission part 21 is sleeved on the outside of the motor shaft 1, and the friction part 22 is a disk-shaped structure perpendicular to the axis of the motor shaft 1. The force transmission part 21 is made of ordinary iron material, which can be attracted by the magnetic force generated by the brake solenoid 31 after being energized. 22 uses semi-metallic hybrid brake pads to ensure the coefficient of friction while having good temperature control capabilities to prevent excessive temperature during friction and damage to the brake disc 2. The force transmission part 21 and the motor shaft 1 can be connected by a spline, so that the brake disc 2 can slide along the motor shaft 1 while rotating with the motor shaft 1. Because the brake disc 2 keeps moving even when not in use, Therefore, when the brake mechanism is activated in an emergency, the brake disc 2 will not be stuck, so the brake mechanism can be started smoothly at any time, and the stability is high.

The smoke blocking wall is mainly used to block the spread of smoke when a fire occurs. When there is no fire, the smoke blocking wall is in a suspended state; when a fire occurs, the motor shaft 1 is driven to rotate, and the motor shaft 1 rotates to drive the block The smoke wall descends to block the spread of smoke. The speed of its descending is also determined by the motor speed, without manual control. At this time, the brake disc 2 is sleeved on the motor shaft 1, and follows the motor shaft 1 to rotate, and the brake disc 2 and There is a gap between the brake heads 3. In an emergency situation, such as damage to the circuit after a fire occurs, and the power supply is not available, the motor cannot drive the motor shaft 1 to rotate, and the smoke blocking wall drives the motor shaft 1 to rotate and descend under the action of its own gravity. At this time, the standby power supply brakes When the electromagnetic coil 31 is energized, the brake electromagnetic coil 31 generates magnetic force to attract the brake disc 2 to move along the motor shaft 1. The force transmission part 21 of the brake disc 2 drives the friction part 22 to move, and finally the friction part 22 and the brake head 3 abut against each other. The friction between them will hinder the rotation of the motor shaft 1, thereby slowing down the rotation speed of the motor shaft 1, so that the smoke-blocking vertical wall will drop at a uniform speed.

The end of the motor shaft 1 is provided with a limiting body 11, the force transmission portion 21 is provided with a first groove 211, and the first groove 211 is provided with a spring 23, which is sleeved on the outside of the motor shaft 1 and abuts against the limiting body 11 . When a fire breaks down the circuit and cannot supply power, the brake solenoid 31 is energized by the standby power supply. After the brake solenoid 31 is energized, magnetic force is generated. The attractive force of the brake solenoid 31 to the brake disc 2 is greater than the elastic force compressed by the spring 23 Therefore, the brake disc 2 will move along the motor shaft 1 and resist the brake head 3, while the spring 23 is compressed; after the normal power supply is restored, the backup power supply will no longer supply power to the brake solenoid 31, and the brake solenoid 31 loses its magnetic force after the power is cut off. , No more attractive force to the brake disc 2, and the compressed spring 23 pushes the brake disc 2 away from the brake head 3 under the elastic force of returning to the original state, so that the two no longer contact, and no friction is generated. The rotation of the motor shaft 1 is hindered, and the brake mechanism no longer brakes the smoke blocking wall at this time.

In this application, there is another way for the installation position between the spring 23 and the brake head 3 and the brake disc 2. A motor housing 7 is provided on the outside of the motor shaft 1, and one end of the motor shaft 1 protrudes from the motor housing 7. The part of the motor shaft 1 protruding from the motor housing 7 is provided with a brake head 3, a brake disc 2 and a limiting body 11 in the direction away from the motor housing 7. The brake head 3 and the motor housing 7 are connected by screws, and the brake disc 2 is connected to the brake. There is a gap between the heads 3, one end of the brake disc 2 abuts against the limiting body 11, the limiting body 11 is fixed on the motor shaft 1, and the brake head 3 is provided with a sleeve 33 and a spring 23 sleeved on the motor shaft 1 One end of the sleeve 33 abuts against one end of the brake disc 2, one end of the spring 23 abuts against the sleeve 33, and the other end abuts against the motor housing 7, as shown in FIG. 2. When it is necessary to brake the smoke blocking wall, the standby power supply energizes the brake solenoid 31. After the brake solenoid 31 is energized, the brake solenoid 31 generates magnetic force, attracting the brake disc 2 to move toward the brake head 3, because one end of the sleeve 33 and one end of the brake disc 2 Contact, one end of the spring 23 abuts against the shaft sleeve 33 and the other end against the motor housing 7. When the brake disc 2 moves in the direction of the brake head 3, it will drive the shaft sleeve 33 to move, thereby compressing the spring 23. The brake solenoid 31 is no longer powered. After the brake solenoid 31 is de-energized, it loses its magnetic force and no longer attracts the brake disc 2. The compressed spring 23 pushes the brake disc 2 away from the brake head under the elastic force of the original state. 3. Make no contact between the two. The difference from the previous installation method is that the brake head 3, brake disc 2 and limit body 11 of this installation method are all installed on the motor shaft 1, and it is no longer necessary to install the brake head 3 on the side of the motor shaft 1, which is convenient Installation of brake head 3.

In this embodiment, the spring 23 is a butterfly spring, and the axis of the disc spring coincides with the rotation axis of the motor shaft 1, because the butterfly spring has the characteristics of large rigidity, strong shock absorption capacity, and ability to withstand large loads with small deformation. In the case where the axial space requirement is small, and in this embodiment, because the brake disc 2 receives the attractive force of the brake solenoid 31 after it is energized, the displacement distance is small when it comes into contact with the brake head 3, and it is transmitted to the spring 23 at the same time. The load of the spring 23 is relatively large, so the working occasion of the spring 23 is the occasion where the axial space is small, and the large load is to be carried with small deformation, so the butterfly spring is more suitable.

The limiting body 11 is a nut set at the end of the motor shaft 1. The reason why the limiting body 11 is set as a nut is because the nut is easy to disassemble, and the brake disc 2 and the spring 23 are positioned on the motor shaft 1 through the limiting body 11. As mentioned above, when the brake mechanism brakes the smoke blocking wall, friction between the friction part 22 of the brake disc 2 and the brake head will cause wear. Therefore, the brake disc 2 should be replaced regularly to ensure that the brake disc 2 can work normally. The limiting body 11 is set as a nut for easy disassembly, so that the brake disc 2 and the spring 23 can be easily removed for replacement.

A lock nut can be selected for the nut. By changing the tightening depth of the nut, the load acting on the brake disc 2 through the spring 23 can be changed, thereby changing the reaction speed of the brake disc 2. When the nut is tightened, the spring 23 between the brake disc and the nut is compressed and deformed more. When the brake solenoid 31 is energized, the magnetic force is generated, which will attract the brake disc 2 to move along the motor shaft 1. 23 has been greatly compressed by the nut, so at this time the brake disc continues to compress the spring 23, and the deformation speed of the spring 23 will slow down, thereby slowing down the movement of the brake disc 2 on the motor shaft 1, so the reaction speed of the brake mechanism will be Slow down; and when the brake solenoid 31 is de-energized, the generated magnetic force disappears, and the compressed spring 23 pushes the brake disc 2 away from the brake head 3 under the elastic force of returning to the original state. The more compressed, the spring 23 returns to its original state. The greater the elasticity of the state, the faster the speed of the brake disc 2 away from the brake head 3, so at this time the reaction speed of the brake mechanism no longer acting will increase. Conversely, when the nut is loosened, the spring 23 between the brake disc and the nut will be compressed and deformed less. In an emergency, the reaction speed of the brake mechanism will increase; when it returns to the normal state, the brake mechanism will not be deformed. The reaction speed of reproductive action will slow down. Users can adjust the tightness of the nut according to their needs.

The brake head 3 includes an annular groove 32 facing the brake disc 2. The brake disc 2 is arranged opposite to the end surface of the outer side wall of the brake head 3, and the annular groove 32 is arranged opposite to the end of the motor shaft 1. 11 Reserve space for disassembly at the end of the motor shaft 1 to prevent the limit body 11 from hitting the brake head during disassembly. On the other hand, it reduces the quality of the brake head 3, reduces the weight of the entire device, and saves materials and reduces The processing cost of the entire device.

The brake head 3 also includes a brake part 34 that rubs against the friction part 22 to perform braking. The brake part 34 is provided with a protrusion 35, and the brake head 3 is provided with a third groove 36 that cooperates with the protrusion 35, and the friction part 22 One end is provided with a thread, as shown in Figure 5. In this application, one end of the brake head 3 is rubbed with the friction part 22 to brake the smoke blocking wall. Long-term friction will cause the brake head to wear. If the wear is too large, the brake solenoid 31 in the brake head 3 will be damaged. In addition, the material of the entire brake head 3 is set as a semi-metallic mixture, which is expensive and will cause cost waste. Therefore, a brake part 34 and a brake part 34 for friction with the friction part 22 are provided at one end of the brake head 3 A protrusion 35 is provided on the upper part, and a third groove 36 is provided on the brake head 3. The brake part 34 is fixed to the brake head 3 through the cooperation of the protrusion 35 and the third groove 36. The brake part 34 is made of a semi-metallic mixture. When the brake part 34 is worn badly, the protrusion 35 is drawn out from the third groove 36, and the brake part 34 can be replaced. A thread is provided at the contact end of the friction part 22 and the brake part 34 in order to increase the friction between the friction part 22 and the brake part 34 when the friction part 22 and the brake part 34 are in contact, so that the braking effect of the brake mechanism is better.

The force transmission part 21 is provided with a first driving surface 212 for the power supply shaft 1 to drive the brake disc 2 to rotate, and the motor shaft 1 is provided with a second driving surface 12 that cooperates with the first driving surface 212. The length is greater than the length of the second driving surface 12, as shown in FIG. 4. The two first driving surfaces 212 are symmetrically arranged on both sides of the inside of the force transmitting portion 21, and at the same time, the motor shaft 1 is also symmetrically provided with two second driving surfaces 12, which pass through the first driving surface 212 on the force transmitting portion 21 and the motor shaft. 1. The cooperation of the second driving surface 12 on the motor shaft 1 can drive the brake disc 2 to rotate with it when the motor shaft 1 rotates. The reason why the cooperation of the motor shaft and the force transmission part is set to a flat structure is because the matching surface is a flat surface. , Which can transmit a larger load, which makes the motor shaft 1 rotate to drive the brake disc 2 to rotate more stably, and the two first driving surfaces 212 are symmetrically arranged on both sides of the inside of the force transmitting portion 21, and at the same time, there are two second driving surfaces It is also symmetrically arranged on the motor shaft 1, so that when the motor shaft 1 rotates to drive the brake disc 2 to rotate, the torsion force of the brake disc 2 acting on the motor shaft 1 is more uniform, and the whole structure is more stable.

There is another way to cooperate between the force transmission part and the motor shaft. The force transmission part 21 is provided with a key bar 213, and the motor shaft 1 is provided with a second recess that cooperates with the key bar 213 and is used to power the motor shaft 1 to drive the brake disc 2 to rotate. Groove 13, the second groove 13 is a strip-shaped groove, and the length of the second groove 13 is greater than the length of the key bar 213, as shown in FIG. The cooperation of the two grooves 13 can drive the brake disc 2 to rotate with it when the motor shaft 1 rotates, but the brake disc 2 not only needs to rotate with the motor shaft 1, but also can move on the motor shaft 1, so the first The two grooves 13 are set as strip grooves, and the length of the second groove is greater than the length of the key bar 213, so that the brake disc 2 can not only rotate with the motor shaft 1 in the second groove 13, but also in the second groove. The groove 13 moves inside, so as to realize the movement of the brake disc 2 on the motor shaft 1. Compared with the above matching method, the disadvantage of this matching method is that the transmitted load is small and there is no stable matching of the driving surface, but its advantage is that the installation and disassembly are more convenient than the driving surface matching, because the driving surface is matched in the installation and removal It needs to pass through the shaft end. If the mating surface is in the middle of the shaft, it needs to pass a long distance, and the installation sequence must be arranged during installation. When disassembling, all the parts at one end of the shaft need to be removed, which is time-consuming and labor-intensive. .

The end of the motor shaft 1 is provided with a bearing 4, and the motor shaft 1 passes through the bearing 4, because in this embodiment, the brake function is to move the brake disc 2 on the motor shaft 1 toward the direction of the brake head 3, and to communicate with the brake head 3 The contact friction is achieved, so the motor shaft 1 can only rotate but cannot move. Therefore, it is necessary to install a bearing 4 at one end of the motor shaft. The bearing 4 can limit the motor shaft 1 to prevent it from moving, and It can ensure its smooth rotation, and the movement of the brake disc 2 on the motor shaft 1 can only be moved within a certain range. If the brake disc 2 moves too far from the brake head 3, it will be generated after the brake solenoid is energized. The suction force cannot attract the brake disc 2 to move in the direction of the brake head 3. Therefore, it is necessary to limit the brake disc 2 on the motor shaft 1 away from the brake head 3. The setting of the bearing 4 not only realizes the brake disc 2 At the same time, it avoids friction between the brake disc 2 and the end of the motor shaft 1 and damages the brake disc 2 and the motor shaft 1.

An end cover 5 is provided on the outer side of the bearing 4, and the bearing 4 is provided on the inner side of the end cover 5 to fix the bearing 4. One end of the bearing 4 abuts against the end of the motor shaft 1, the other end abuts against the brake disc, and the outside abuts against the end cover 5, so that the bearing 4 is completely fixed on the motor shaft 1, only the bearing 4 is completely fixed , The rotation of motor shaft 1 and brake disc 2 can be more safe and reliable.

The outer side of the brake disc 2 is provided with a casing 6, and the casing 6 and the brake disc 2 are connected by screws. The shell 6 has a cylindrical structure. The annular end surface of the side wall of the shell 6 abuts against the side of the end cover 5. The bottom surface of the shell 6 is provided with screws and is fixed to the brake head 3, and the screws are located in the center of the bottom surface of the shell 6. The housing 6 is arranged to protect the brake solenoid 31 on the brake head 3 from damage by foreign objects, and at the same time not to be easily affected by external electromagnetic interference. On the other hand, it is to prevent the motor shaft 1 from driving the brake disc 2 to rotate at a high speed. People are careful to touch the upper surface and cause greater injury. The housing 6 can be arranged to avoid direct contact between people and the brake disc 2. The casing 6 and the brake disc 2 are connected by screws to facilitate disassembly. Although the setting of the casing 6 can provide good protection, the casing 6 will hinder it when the brake mechanism is overhauled. Therefore, screws are used. Connection, easy to disassemble when the brake mechanism is overhauled.

The above description is only an explanation of the present invention, so that a person of ordinary skill in the art can fully implement the solution, but it is not a limitation of the present invention. After reading this specification, those skilled in the art can make no creativity in this embodiment as needed. Contribution modifications, these are non-creative modifications, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

A smoke-blocking vertical wall brake mechanism, which is characterized in that it comprises a motor shaft (1), a brake disc (2) and a brake head (3). The brake disc (2) comprises a force transmission part (21) and a friction part ( 22) The motor shaft (1) is inserted into the force transmission part (21) and drives the brake disc (2) to rotate, the brake head (3) is located on the side of the friction part (22), so The brake head (3) includes a brake solenoid (31).
The smoke-blocking vertical wall brake mechanism according to claim 1, characterized in that: the end of the motor shaft (1) is provided with a limiting body (11), and the force transmitting portion (21) is in contact with the limiting body (11). A spring (23) is arranged between the bodies (11), and the spring (23) is sleeved on the outside of the motor shaft (1) and abuts against the limiting body (11).
The smoke blocking vertical wall brake mechanism according to claim 2, characterized in that: the spring (23) is a disc spring, and the axis of the disc spring coincides with the rotation axis of the motor shaft (1) .
The smoke blocking vertical wall brake mechanism according to claim 2, characterized in that: the limiting body (11) is a nut arranged at the end of the motor shaft (1), and the nut is a lock nut .
The smoke blocking vertical wall brake mechanism according to claim 1, wherein the brake head (3) includes an annular groove (32) facing the brake disc (2), and the annular groove (32) It is arranged opposite to the end of the motor shaft (1), and further includes a braking portion (34) that rubs against the friction portion (22) to perform braking, and the braking portion (34) is provided with a protrusion (35), The brake head (3) is provided with a third groove (36) matched with the protrusion (35), and one end of the friction part (22) is provided with a thread.
The smoke-blocking vertical wall brake mechanism according to claim 1, characterized in that: the force transmission portion (21) is provided with a function for the motor shaft (1) to drive the brake disc (2) to rotate The first driving surface (212), the motor shaft (1) is provided with a second driving surface (12) that cooperates with the first driving surface (212), and the length of the second driving surface (12) is greater than the length of the second driving surface (12). The first driving surface (212).
The smoke blocking vertical wall brake mechanism according to claim 1, characterized in that: the end of the motor shaft (1) is provided with a bearing (4), and the motor shaft (1) passes through the bearing (4). ), the force transmission portion (21) is provided with a key bar (213), and the motor shaft (1) is provided with a key bar (213) to cooperate with the key bar (213) for driving the motor shaft (1) The second groove (13) for the rotation of the brake disc (2), the second groove (13) is a bar-shaped groove, and the length of the second groove (13) is greater than that of the key bar (213) length.
The smoke blocking vertical wall brake mechanism according to claim 7, characterized in that: an end cover (5) is provided on the outer side of the bearing (4), and the bearing (4) is provided on the end cover (5) Inside.
The smoke-blocking vertical wall brake mechanism according to claim 1, characterized in that: the outer side of the brake disc (2) is provided with a casing (6), and the casing (6) and the brake disc (2) are separated from each other. Connected by screws.
The smoke-blocking vertical wall brake mechanism according to claim 2, characterized in that it further comprises a motor housing (7) arranged on the outside of the motor shaft (1), and one end of the motor shaft (1) extends from the motor housing (7). ), the part of the motor shaft (1) that extends out of the motor housing is sequentially provided with a brake head (3), a brake disc (2) and a limiting body (11) in a direction away from the motor housing (7), The brake head (3) and the motor housing (7) are connected by screws, a gap is provided between the brake disc (2) and the brake head (3), and one end of the brake disc (2) is connected to the The limiting body (11) abuts, the limiting body (11) is fixed on the motor shaft (1), and the brake head (3) is provided with a sleeve sleeved on the motor shaft (1) (33) and a spring (23). One end of the sleeve (33) abuts against one end of the brake disc (2), one end of the spring (23) abuts against the sleeve (33), and the other end abuts against The motor housing (7) abuts.