A spindle brake for an escalator or moving walkway

Abstract

The present invention discloses a main shaft brake for an escalator or moving walkway, comprising: a brake mechanism sleeved on the main shaft of the escalator or moving walkway; an action generating mechanism driving a brake actuator to brake the brake mechanism; and the brake actuator and the action generating mechanism are located in front of the main shaft, above the center of the main shaft, below the comb plate and the inspection cover plate, and in the outer corner area of ​​the brake mechanism rotation outside the step turning envelope area. When the main shaft of the present invention is braked with load, the main shaft bearing needs to bear the combined effect of the passenger load and the brake load. The upper action generating mechanism of the present invention can reasonably reduce the bearing load and improve the bearing life.

Description

Technical Field

[0001] The invention relates to the technical field of escalators, in particular to the technical field of a main shaft brake of an escalator or a moving walkway. Background Art

[0002] Escalators are generally equipped with main brakes, which are usually installed on the escalator drive system. By applying braking torque to the high-speed shaft of the drive system, such as the motor main shaft or the reduction gearbox input shaft, the running parts of the escalator, such as the ladder system and handrail system, can be stopped. When stopping the escalator, the braking torque transmission path is main brake-reduction gearbox-drive chain-spindle-step chain-step.

[0003] At present, most escalators use single or multiple rows of chains to connect the drive system and the main shaft. Once the chain fails or the drive is displaced, the main brake will fail at the same time, and the escalator will inevitably face dangerous situations such as reversal, slipping, and downward overspeed. If an additional brake represented by the main shaft brake is set, it can directly apply braking torque to the main shaft to stop the escalator in the event of main brake failure, drive chain breakage, drive displacement, etc., to avoid the occurrence or expansion of injury accidents.

[0004] However, referring to the relevant standards for escalators such as GB 16899 and EN 115, escalators and inclined moving walkways are required to be equipped with additional brakes only when the lifting height is greater than 6m; additional brakes should also be installed for public transportation escalators and inclined moving walkways with a lifting height of no more than 6m. Therefore, non-public transportation escalators that meet the standards in use only have one main brake at a smaller lifting height. As mentioned above, if additional brakes are added at a smaller lifting height, the safety of escalators and inclined moving walkways can be greatly improved. However, the current common structural type of additional brakes (spindle brakes) occupy a large machine room space, and the additional installation of additional brakes will increase the civil engineering size of the escalator or moving walkway. Moreover, if additional brakes are considered to be installed on the escalator in use, it will not be possible to use conventional structural products due to space limitations.

[0005] In patent CN 103241636 B, the spindle brake is arranged obliquely below the spindle, which is inconvenient to operate and has poor visibility during installation and daily maintenance; and the action rod is in an approximately horizontal state, and its center of gravity has a large offset, which forms a large torque on the rotating shaft. In order to smoothly achieve braking and return, larger springs and spindle brakes are required, which increases costs and occupies more machine room space.

[0006] In patent CN 106044519 A, the pawl mechanism is arranged on the side of the brake wheel, which is also inconvenient to install and maintain daily, and has poor visibility. In addition, during braking, the brake device and its mounting seat are subjected to the braking reaction force of the main drive wheel and the bending moment formed by the eccentric braking force, and the force is relatively severe. While strengthening the pawl, it is also necessary to strengthen the side of the truss to increase the cross-sectional size and the bending section coefficient, which is not conducive to reducing the overall width of the truss.

[0007] In addition, the existing spindle brake 001 is generally a bottom-mounted type, see Figure 1 and Figure 2 As shown, the lower spindle brake 001 is generally arranged below the center of the spindle 0011; since the left and right width of the electromagnet of the lower spindle brake 001 is usually between 150 and 250 mm, it occupies a large amount of the maintenance area 002; and see Figure 3 and Figure 4 As shown in the figure, the bearing force analysis of the main shaft of the bottom-mounted main shaft brake shows that during load braking, Ft is the force transmitted from the escalator passenger load to the main shaft bearing through the step sprocket, and FN is the force transmitted from the braking load on the ratchet to the main shaft bearing. Therefore, the main shaft bearing bears a larger resultant force F2. Summary of the invention

[0008] In view of the above problems, the present invention provides a spindle brake of an escalator or a moving walkway with a new structure. By improving the structure of the spindle brake and changing the position of the spindle brake on the escalator or the moving walkway, the rotating shaft is located above the center of gravity of the brake actuator, so that the output force requirement of the electromagnet is correspondingly reduced, thereby reducing the size of the electromagnet; and reducing the utilization of the maintenance area by the brake actuator and the action generating mechanism; therefore, the space utilization rate of the escalator or the moving walkway is improved, the production cost is reduced, and the installation and maintenance are convenient.

[0009] In order to achieve the above objectives, the technical solutions adopted are as follows:

[0010] A main shaft brake for an escalator or a moving walkway, comprising:

[0011] A brake mechanism, the brake mechanism being sleeved on the main shaft of the escalator or moving walkway;

[0012] An action generating mechanism, wherein the action generating mechanism drives a brake actuator to brake the brake mechanism; and the brake actuator and the action generating mechanism are located in front of the main shaft, above the center of the main shaft, below the comb plate and the inspection cover plate, and in the outer rounded corner area of ​​the brake mechanism rotation outside the step flip envelope area.

[0013] The above-mentioned main shaft brake of an escalator or a moving walkway, wherein the brake actuator includes a body and a rotating shaft, the body is mounted on a mounting seat through the rotating shaft, and the mounting seat is arranged on the upper beam of the upper truss; by moving the upper end or the middle part of the body, the body can be controlled to rotate around the rotating shaft, so that the lower end of the body is used to brake the brake mechanism or disengage from the brake mechanism.

[0014] The above-mentioned spindle brake of an escalator or moving walkway, wherein the action generating mechanism includes a return device, an action device and a transmission device; the return device is installed on the mounting seat, and the return device is connected to the upper end or the middle part of the brake actuator through the transmission device; one end of the action device is arranged on the return device, and the other end of the action device is arranged on the transmission device.

[0015] In the above-mentioned spindle brake of an escalator or a moving walkway, the mounting seat is integrally connected to the upper beam of the upper truss, connected to the upper beam of the upper truss via fasteners, or connected to the upper beam of the upper truss via a vibration-damping and buffering device.

[0016] The above-mentioned main shaft brake of an escalator or moving walkway, wherein the transmission device is a connecting rod, one end of the connecting rod is connected to the moving end of the return device through a rotating pair or a ball pair, and the other end of the connecting rod is connected to the upper end or middle part of the brake actuator through a rotating pair or a ball pair.

[0017] The above-mentioned spindle brake of an escalator or moving walkway, wherein the transmission device is a rod, one end of which is connected to the moving end of the return device, and the other end of which is connected to the upper end or middle part of the brake actuator through a cylinder and a plane pair.

[0018] In the above-mentioned spindle brake of an escalator or moving walkway, the transmission device is a rod, one end of the rod is connected to the moving end of the return device, and the other end of the rod is connected to the upper end or middle part of the brake actuator through a spherical surface and a plane pair.

[0019] In the above-mentioned spindle brake of an escalator or a moving walkway, the actuating device is an elastic element or a device that can convert gravity into an actuating force.

[0020] In the above-mentioned spindle brake of an escalator or a moving walkway, the return device is an electromagnet, the end of the plunger of the electromagnet is the moving end, and the plunger moves axially along its axial direction.

[0021] Compared with the prior art, the above technology has the following positive effects:

[0022] The rotating shaft of the brake actuator of the present invention is located above the center of gravity of the main body. The center of gravity of the brake actuator moves slightly forward and backward relative to the rotating shaft in the movement area. The torque value caused by gravity is always small, which reduces the output force requirement of the action generating mechanism, thereby helping to reduce the system volume and cost.

[0023] The output force requirement of the downward-mounted spindle brake of the present invention is lower than that of the prior art, so the required output power is reduced; and because the action generating mechanism in the prior art also brakes when power is lost, the return device in the action generating mechanism has a long working time, so the present invention has the technical effect of energy saving compared with the prior art.

[0024] The action generating mechanism of the present invention is placed upward, which improves the field of vision and lighting conditions during operation, ensures the standing space required by the installer, and improves the quality of installation and maintenance compared to the existing setting scheme of the action generating mechanism placed downward or sideways.

[0025] When the main shaft of the present invention is subjected to load braking, the main shaft bearing needs to bear the combined effect of the passenger load and the braking load. The upper-mounted action generating mechanism of the present invention can reduce the combined force borne by the bearing and improve the bearing life.

[0026] Compared with the currently commonly used spindle brake, the present invention is small in size, compact in structure, low in cost, and highly integrated. It can make full use of the spare area of ​​the outer rounded corner of the brake mechanism above the center of the spindle in the upper truss, below the comb plate and the inspection cover plate, and outside the step turning envelope area, thereby reducing the occupation of the maintenance area of ​​the machine room, and making the civil engineering size of the escalator and moving walkway smaller. Moreover, for the current large number of existing escalators and inclined moving walkways, since a smaller spindle brake can be installed in this spare area, it can be directly installed without making minor changes to the truss and increasing the size of the truss, and the expandability is better. In addition, the additional brake can greatly improve the safety of the existing escalator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a front view of a bottom-mounted spindle brake of the background technology;

[0028] Figure 2 is a top view of a bottom-mounted spindle brake of the background technology;

[0029] Figure 3 It is a schematic diagram of the bearing force of the main shaft of the bottom-mounted main shaft brake of the background technology;

[0030] Figure 4 It is a force analysis diagram of the main shaft bearing of the bottom-mounted main shaft brake of the background technology;

[0031] Figure 5It is a schematic diagram of a transmission device of a main shaft brake of an escalator or a moving walkway provided with a revolving pair according to a first embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of a transmission device of a main shaft brake of an escalator or a moving walkway provided with a ball pair according to a first embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of a brake actuator mechanism of a main shaft brake of an escalator or a moving walkway according to a first embodiment of the present invention;

[0034] Figure 8 It is a schematic diagram of a brake actuator disengaging brake mechanism of a main shaft brake of an escalator or a moving walkway according to a second embodiment of the present invention;

[0035] Fig. 9 is a schematic diagram of a brake actuator mechanism of a main shaft brake of an escalator or a moving walkway according to a second embodiment of the present invention;

[0036] Fig.10 It is a front view of a main shaft brake of an escalator or a moving walkway of the present invention;

[0037] Fig.11 is a top view of a main shaft brake of an escalator or a moving walkway of the present invention;

[0038] Fig.12 It is a schematic diagram of the bearing force of the main shaft of the main shaft brake of an escalator or a moving walkway of the present invention;

[0039] Fig.13 The present invention discloses a force analysis diagram of a main shaft bearing of a main shaft brake of an escalator or a moving walkway.

[0040] Fig.14 It is a schematic diagram of a brake actuator disengaging brake mechanism of a main shaft brake of an escalator or a moving walkway according to a third embodiment of the present invention;

[0041] Fig.15 Schematic diagram of a brake actuator disengaging brake mechanism of a main shaft brake of an escalator or a moving walkway according to a fourth embodiment of the present invention;

[0042] In the attached figure:

[0043] First embodiment:

[0044] 1. Braking mechanism; 11. Main shaft; 111. Ratchet guide; 2. Action generating mechanism; 21. Return device; 211. Mounting seat; 22. Action device; 23. Transmission device; 231. Rotation pair; 232. Rotation pair; 2311. Ball pair; 2312. Ball pair; 3. Braking actuator; 31. Main body; 32. Rotating shaft; 321. Mounting seat; 4. Step flip envelope area; 51. Upper truss upper beam; 52. Upper truss lower beam; 6. Comb plate and inspection cover.

[0045] Second embodiment:

[0046] 02231, rod; 0231, body; 02311, groove.

[0047] Third embodiment:

[0048] 0331. Main body; 0332. Rotating shaft.

[0049] Fourth embodiment:

[0050] 04231, rod; 0431, body; 04311, groove; 0432, rotating shaft. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0052] Figure 5 It is a schematic diagram of a transmission device of a main shaft brake of an escalator or a moving walkway provided with a revolving pair according to a first embodiment of the present invention; Figure 6 It is a schematic diagram of a transmission device of a main shaft brake of an escalator or a moving walkway provided with a ball pair according to a first embodiment of the present invention; Figure 7 is a schematic diagram of a brake actuator mechanism of a main shaft brake of an escalator or a moving walkway according to a first embodiment of the present invention; Fig.10 It is a front view of a main shaft brake of an escalator or a moving walkway of the present invention; Fig.11 is a top view of a main shaft brake of an escalator or a moving walkway of the present invention; Fig.12 It is a schematic diagram of the bearing force of the main shaft of the main shaft brake of an escalator or a moving walkway of the present invention; Fig.13 14 is a schematic diagram of the braking mechanism of the main shaft brake of an escalator or a moving walkway according to the third embodiment of the present invention; Fig.15 It is a schematic diagram of a brake actuator disengaging a brake mechanism of a main shaft brake of an escalator or a moving walkway according to a fourth embodiment of the present invention.

[0053] See also Figures 5 to 7 and Figures 10 to 13 As shown, in a preferred embodiment, a main shaft brake of an escalator or a moving walkway is shown, comprising:

[0054] The brake mechanism 1 is sleeved on a main shaft 11 of an escalator or a moving walkway.

[0055] The action generating mechanism 2 drives the brake actuator 3 to brake the brake mechanism 1; and the brake actuator 3 and the action generating mechanism 2 are located in front of the main shaft 11, above the center of the main shaft 11, below the comb plate and the inspection cover 6, and in the outer rounded corner area of ​​the brake mechanism rotation outside the step flip envelope area 4.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0057] Further, in a preferred embodiment, see Fig.11 As shown: the step reversal envelope area 4 refers to the area swept by the circulating steps when they transition between the passenger branch and the return branch at the turning station.

[0058] Furthermore, in a preferred embodiment, the braking mechanism 1 is disposed between the upper truss upper beam 51 and the upper truss lower beam 52 .

[0059] Furthermore, in a preferred embodiment, the brake actuator 3 includes a main body 31 and a rotating shaft 32, the main body 31 is mounted on a mounting seat 321 via the rotating shaft 32, and the mounting seat 321 is arranged on the upper beam 51 of the upper truss; by moving the upper end of the main body 31, the main body 31 can be controlled to rotate around the rotating shaft 32, so that the lower end of the main body 31 is used to brake the brake mechanism 1 or disengage from the brake mechanism 1.

[0060] Further, in a preferred embodiment, the action generating mechanism 2 includes a return device 21, an action device 22 and a transmission device 23; the return device 21 is installed on the mounting seat 211, and the return device 21 is connected to the upper end of the brake actuator 3 through the transmission device 23; one end of the action device 22 is arranged on the return device 21, and the other end of the action device 22 is arranged on the transmission device 23.

[0061] Furthermore, in a preferred embodiment, the mounting seat 211 is integrally connected to the upper truss upper beam 51, connected to the upper truss upper beam 51 via fasteners, or connected to the upper truss upper beam 51 via a vibration-damping and buffering device.

[0062] Further, in a preferred embodiment, the transmission device 23 is a connecting rod, one end of the connecting rod is connected to the moving end of the return device 21 through a rotating pair 231 or a ball pair 2311, and the other end of the connecting rod is connected to the upper end of the brake actuator 3 through a rotating pair 232 or a ball pair 2312. Specifically, the rotating pair 231 and the rotating pair 232 are rotating joints. The ball pair 2311 and the ball pair 2312 are ball joint settings. When the ball pair setting is adopted, the connecting rod has an additional local degree of freedom to rotate around its own axis, but it does not affect the operation of the system.

[0063] Furthermore, in a preferred embodiment, the actuating device 22 is an elastic element, such as a coil spring, a disc spring, a gas spring, a leaf spring, etc.

[0064] Furthermore, in a preferred embodiment, the actuating device 22 may be a device that can convert gravity into an actuating force; for example, an eccentric load directly connected to the brake actuator 3 through a weight block, and the load forms a torque around the rotating shaft 32, so that the lower end of the main body 31 has a tendency to rotate toward the brake mechanism 1.

[0065] Furthermore, in a preferred embodiment, the return device 21 is an electromagnet, the end of the electromagnet's plunger is the moving end, and the plunger moves axially along its axis; the electromagnet generates an electromagnetic force on the plunger, so that the plunger can move axially. When the electromagnet is powered on, the electromagnet generates an electromagnetic force; when the electromagnet loses power, the electromagnet loses the electromagnetic force.

[0066] Furthermore, in a preferred embodiment, the brake mechanism 1 is a ratchet wheel, which can be sleeved on the main shaft 11, and the body 31 is a ratchet rod, the center of gravity of which should be located below the rotating shaft 32. Therefore, the center of gravity of the ratchet rod moves slightly forward and backward relative to the rotating shaft 32 within the preset motion area, forming a variable torque around the rotating shaft 32, and the torque amplitude is always small, which reduces the requirements for the output force of the electromagnet, thereby reducing the volume and cost of the electromagnet, and also reduces the power consumption of the electromagnet, achieving energy-saving effects. In addition, a ratchet guide portion 111 can be provided on the ratchet wheel; specifically, when braking is required, the lower end of the ratchet rod can contact the guide portion 111, thereby achieving braking of the ratchet wheel by the ratchet rod.

[0067] Furthermore, in a preferred embodiment, the brake actuator 3 and the action generating mechanism 2 are located in the brake mechanism rotation outer corner area in front of the main shaft 11, above the center of the main shaft 11, below the comb plate and the inspection cover plate, and outside the step flip envelope area 4. Therefore, the system integration and space utilization are improved, and the occupancy of the maintenance area 7 is reduced. And according to GB16899, "In the machine room, especially in the drive station and steering station inside the truss, there should be a space with a large enough standing area without any permanent fixed equipment, and the standing area should not be less than 0.3m 2, the length of its smaller side should not be less than 0.5m. "; When the maintenance and inspection space cannot meet the requirement due to the occupation of the brake, it is usually necessary to extend the upper truss to use the extended space to meet the standard requirements of the maintenance and inspection space, which directly increases the civil engineering size and truss cost. The present invention does not involve this problem, especially when it is applied to the case where the width of the step or pedal is 0.6m or 0.8m (the truss width is small), the present invention has obvious advantages.

[0068] In addition, the action generating mechanism 2 of the present invention is located above the center of the main shaft 11, which not only improves the field of vision and lighting conditions during operation, but also facilitates installation and maintenance personnel to adopt a comfortable standing posture for operation. At the same time, the width of the electromagnet of the embodiment of the present invention is about 30 to 70 mm, which can reduce the width of the truss, thereby reducing the construction size and reducing the production cost of the truss.

[0069] In addition to the above embodiments, the present invention also has the following working method:

[0070] In the braking state, the return device 21 does not output force, and the action device 22 moves the upper end of the brake actuator 3 through the transmission device 23, so that the body 31 of the brake actuator 3 rotates around the rotating shaft 32, causing the lower end of the body 31 to be used for the brake mechanism 1, thereby achieving braking of the main shaft 11.

[0071] In the return state, the moving end of the return device 21 moves the upper end of the main body 31 of the brake actuator 3 through the transmission device 23, overcomes the action force of the action device 22, the system friction resistance, etc., so that the main body 31 of the brake actuator 3 rotates around the rotating axis, causing the lower end of the main body 31 of the brake actuator 3 to leave the envelope area of ​​the brake mechanism 1, so as to realize the return of the brake actuator 3.

[0072] In the holding state, the escalator or moving walkway works normally. At this time, the moving end of the return device 21 always applies a holding force to the body 31 of the brake actuator 3 through the transmission device 23 to ensure that the brake actuator 3 is separated from the brake mechanism 1.

[0073] Second embodiment:

[0074] Figure 8 It is a schematic diagram of a brake actuator disengaging brake mechanism of a main shaft brake of an escalator or a moving walkway according to a second embodiment of the present invention; Fig. 9 It is a schematic diagram of a brake actuator mechanism of a main shaft brake of an escalator or a moving walkway according to a second embodiment of the present invention.

[0075] See also Figures 8 to 9 As shown, the braking mechanism, return device and action device of the second embodiment are the same as those of the first embodiment, and are characterized in that:

[0076] The upper end of the body 0231 of the brake actuator 3 is provided with a groove 02311 .

[0077] The transmission device 23 is a rod 02231; one end of the rod 02231 is connected to the movable end of the return device 21, and the other end of the rod 02231 extends into the groove 02311; the rod 02231 is connected to the main body 0231 through a cylinder and a plane pair, and specifically the rod 02231 is provided with a cylinder, and slides on the side wall of the groove 02311 through the side of the cylinder; or the rod 02231 is connected to the main body 0231 through a spherical surface and a plane pair, and specifically the rod 02231 is provided with a sphere, and slides on the side wall of the groove 02311 through the spherical surface of the sphere.

[0078] Third embodiment:

[0079] Fig.14 It is a schematic diagram of a brake actuator disengaging a brake mechanism of a main shaft brake of an escalator or a moving walkway according to a third embodiment of the present invention.

[0080] See also Fig.14 As shown, the braking mechanism, action generating mechanism, and brake actuating mechanism of the third embodiment are the same as those of the first embodiment, and are characterized in that:

[0081] The brake actuator 3 includes a main body 0331 and a rotating shaft 0332. The upper end of the main body 0331 is mounted on the mounting seat 321 through the rotating shaft 0332. The mounting seat 321 is arranged on the upper beam 51 of the upper truss. The action generating mechanism 2 can control the main body 0331 to rotate around the rotating shaft 0332 by moving the middle part of the main body 0331, so that the lower end of the main body 0331 is used to brake the brake mechanism 1 or disengage from the brake mechanism 1.

[0082] Fourth embodiment:

[0083] Fig.15 It is a schematic diagram of a brake actuator disengaging a brake mechanism of a main shaft brake of an escalator or a moving walkway according to a fourth embodiment of the present invention.

[0084] See also Fig.15 As shown, the braking mechanism, return device and action device of the fourth embodiment are the same as those of the first embodiment, and are characterized in that:

[0085] The brake actuator 3 includes a main body 0431 and a rotating shaft 0432. The upper end of the main body 0431 is mounted on the mounting seat 321 through the rotating shaft 0432. The mounting seat 321 is arranged on the upper beam 51 of the upper truss. The action generating mechanism 2 can control the main body 0431 to rotate around the rotating shaft 0432 by moving the middle part of the main body 0431, so that the lower end of the main body 0431 is used to brake the brake mechanism 1 or disengage from the brake mechanism 1.

[0086] A groove 04311 is provided in the middle of the side wall of the body 0431 of the brake actuator 3 .

[0087] The transmission device 23 is a rod 04231; one end of the rod 04231 is connected to the movable end of the return device 21, and the other end of the rod 04231 extends into the groove 04311; the rod 04231 is connected to the main body 0431 through a cylinder and a plane pair, and specifically the rod 04231 is provided with a cylinder, and slides on the side wall of the groove 04311 through the side of the cylinder; or the rod 04231 is connected to the main body 0431 through a spherical surface and a plane pair, and specifically the rod 04231 is provided with a sphere, and slides on the side wall of the groove 04311 through the spherical surface of the sphere.

[0088] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A spindle brake for an escalator or moving walkway, characterized in that: include: A brake mechanism, wherein the brake mechanism is sleeved on the main shaft of the escalator or moving walkway; An action generating mechanism, wherein the action generating mechanism drives the brake actuator to brake the brake mechanism; and the brake actuator and the action generating mechanism are located in front of the main shaft, above the center of the main shaft, below the comb plate and the inspection cover plate, and in the outer rounded corner area of ​​the brake mechanism outside the step flip envelope area; The brake actuator comprises a body and a rotating shaft, wherein the body is mounted on a mounting seat via the rotating shaft, and the mounting seat is arranged on an upper beam of an upper truss; the body can be controlled to rotate around the rotating shaft by moving the upper end or the middle part of the body, so that the lower end of the body is used to brake the brake mechanism or to disengage from the brake mechanism; The action generating mechanism comprises a return device, an action device and a transmission device; the return device is mounted on the mounting seat, and the return device is connected to the upper end or the middle part of the brake actuator through the transmission device; one end of the action device is arranged on the return device, and the other end of the action device is arranged on the transmission device; The return device is an electromagnet, the end of the plunger of the electromagnet is the moving end, and the plunger moves axially along its axial direction; When the electromagnet is powered on, the electromagnet generates electromagnetic force; when the electromagnet is powered off, the electromagnet loses the electromagnetic force; In the braking state, the return device does not output force, and the action device moves the upper end of the brake actuator through the transmission device, so that the body of the brake actuator rotates around the rotating shaft, causing the lower end of the body to be used for the brake mechanism, thereby achieving braking of the main shaft; In the return state, the moving end of the return device moves the upper end of the body of the brake actuator through the transmission device, so that the body of the brake actuator rotates around the rotating shaft, causing the lower end of the body of the brake actuator to leave the envelope area of ​​the brake mechanism, so as to realize the return of the brake actuator; In the holding state, the escalator or moving walkway operates normally, and the moving end of the return device always applies a holding force to the body of the brake actuator through the transmission device to ensure that the brake actuator is separated from the brake mechanism.

2. The main shaft brake of an escalator or moving walkway according to claim 1, characterized in that: The mounting seat is integrally connected to the upper beam of the upper truss, connected to the upper beam of the upper truss via a fastener, or connected to the upper beam of the upper truss via a vibration-damping and buffering device.

3. The main shaft brake of an escalator or moving walkway according to claim 1, characterized in that: The transmission device is a connecting rod, one end of which is connected to the moving end of the return device through a rotating pair or a ball pair, and the other end of the connecting rod is connected to the upper end or middle part of the brake actuator through a rotating pair or a ball pair.

4. The main shaft brake of an escalator or moving walkway according to claim 1, characterized in that: The transmission device is a rod, one end of which is connected to the moving end of the return device, and the other end of which is connected to the upper end or the middle part of the brake actuator through a cylinder and a plane pair.

5. The main shaft brake of an escalator or moving walkway according to claim 1, characterized in that: The transmission device is a rod, one end of which is connected to the moving end of the return device, and the other end of which is connected to the upper end or the middle part of the brake actuator through a spherical surface and a plane pair.

6. The main shaft brake of an escalator or moving walkway according to claim 1, characterized in that: The actuating device is an elastic element or a device capable of converting gravity into an actuating force.

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