Electromagnetic brake, escalator motor and escalator

Abstract

According to the electromagnetic brake, the escalator motor and the escalator, the electromagnetic brake comprises a brake disc, a movable iron core, a static iron core, a spinning cover and a torque adjusting assembly, the spinning cover is in threaded connection with the static iron core, the spinning cover comprises a pressure adjusting part, and a plurality of limiting grooves are formed in the position, at the pressure adjusting part, of the spinning cover; the torque adjusting assembly penetrates through the static iron core and comprises a pressure adjusting column and a first elastic element, the first elastic element is arranged between the movable iron core and the pressure adjusting column in a pre-compression mode, and the end, away from the first elastic element, of the pressure adjusting column abuts against the pressure adjusting part; when the spinning cover rotates relative to the static iron core, the spinning cover can drive the first elastic element to deform through the pressure adjusting column, and the pressure adjusting column enters and exits the limiting groove. According to the electromagnetic brake, the braking torque of the electromagnetic brake can be adjusted, in addition, real-time feedback can be conducted in the adjusting process of the braking torque of the electromagnetic brake, and excessive adjustment is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field related to electromagnetic brakes, and in particular relates to an electromagnetic brake, an escalator motor and an escalator. Background Art

[0002] In the existing escalator industry, the electromagnetic brake in the escalator motor is usually a power-off type electromagnetic brake, so that the electromagnetic brake can automatically stop the motor shaft in the escalator motor after the induction coil is powered off.

[0003] At present, the braking torque in the existing electromagnetic brake is a preset fixed value, so that the escalator motor using the electromagnetic brake cannot adjust the braking torque adaptively according to the requirements of the on-site working conditions. However, since the electromagnetic brake of the escalator motor is a belt-speed brake, compared with the zero-speed braking method, the belt-speed brake braking method will increase the impact wear of the brake disc in the electromagnetic brake of the escalator motor during braking, causing the brake clearance and the friction surface state of the brake disc to change during the braking of the electromagnetic brake, and affecting the braking torque of the electromagnetic brake, which will make the originally set braking torque of the electromagnetic brake unable to meet the actual requirements of the on-site working conditions. Therefore, it is necessary to design an electromagnetic brake with adjustable braking torque to meet the maintenance requirements of the escalator motor in the long-term use of the escalator. Summary of the invention

[0004] In view of this, it is necessary to provide an electromagnetic brake with adjustable braking torque, an escalator motor and an escalator.

[0005] An electromagnetic brake, comprising:

[0006] Brake disc, used to connect the motor shaft;

[0007] A moving iron core, a stationary iron core and an induction coil are sequentially arranged on one side of the brake disc along the axial direction of the brake disc, and the induction coil is installed on the stationary iron core. When the power is on or off, the moving iron core is attracted or released to drive the moving iron core to reciprocate relative to the brake disc and control the locking / unlocking of the brake disc;

[0008] A spin-on cover is arranged on a side of the static iron core away from the moving iron core and is screwed to the static iron core, the spin-on cover comprises a pressure regulating portion, the spin-on cover is provided with a plurality of limiting grooves at the position of the pressure regulating portion, and the plurality of limiting grooves are arranged at intervals along the circumferential direction of the static iron core;

[0009] A torque regulating assembly is arranged through the static iron core, the torque regulating assembly includes a pressure regulating column and a first elastic element, the first elastic element is arranged between the moving iron core and the pressure regulating column in a pre-compressed manner, and one end of the pressure regulating column away from the first elastic element abuts against the pressure regulating portion;

[0010] When the spin-on cover rotates relative to the static iron core, the spin-on cover can drive the first elastic element to deform through the pressure-regulating column, and make the pressure-regulating column enter and exit the limiting groove.

[0011] It can be understood that the control of the deformation of the first elastic element when the rotary cover rotates on the static iron core can realize the adjustment of the pressing force of the first elastic element on the moving iron core, so that the braking torque of the electromagnetic brake can be adjusted to meet different torque requirements; in this process, the feedback generated when the pressure regulating column enters and exits the limiting groove can be used to achieve the purpose of prompting the user, which not only improves the user's operating experience when adjusting the braking torque of the electromagnetic brake, but also provides real-time feedback during the adjustment process of the braking torque of the electromagnetic brake to prevent excessive adjustment, thereby avoiding the risk of unrecognizable caused by excessive adjustment of the electromagnetic brake.

[0012] In one embodiment, the pressure regulating column has a ball head, and the pressure regulating column can be pressed against the pressure regulating portion through the ball head;

[0013] Wherein, the ball head is matched with the limiting groove.

[0014] It can be understood that the pressure regulating column uses a ball head to enter and exit the limiting groove. By utilizing the structural characteristics of the ball head, the friction resistance encountered by the ball head when entering and exiting the limiting groove can be reduced, so that the ball head on the pressure regulating column can smoothly enter and exit the limiting groove.

[0015] In one of the embodiments, one of the spin-on cover and the static iron core is marked with a scale line, and the other is provided with a mark, and the mark can be aligned with the scale line to guide the adjustment of the rotation of the spin-on cover on the static iron core.

[0016] It can be understood that the scale of the scale lines is used to guide the rotation of the spin-on cover on the static iron core, so that the rotation angle of the spin-on cover when rotating on the static iron core can be quantified, and the visualization of the braking torque adjustment of the electromagnetic brake can be realized, which can improve the accuracy of the braking torque adjustment of the electromagnetic brake to meet the use requirements of on-site working conditions.

[0017] In one embodiment, the number of the torque adjustment components is configured as multiple groups, and the multiple groups of the torque adjustment components are arranged symmetrically with respect to the center axis of the moving iron core.

[0018] It can be understood that the multiple groups of torque adjustment components are arranged in a centrally symmetrical manner so that the multiple groups of torque adjustment components can achieve a horizontal push of the moving iron core toward the brake disc and make the moving iron core evenly compressed.

[0019] In one embodiment, the central axis of the spin-on cover and the central axis of the static iron core are arranged on the same straight line; the spin-on cover is provided with a screwing portion, and the screwing portion is used to be plugged with an external screwing tool to drive the spin-on cover to rotate relative to the static iron core;

[0020] Among them, a U-shaped channel is opened on the static iron core, the spin-pressed cover protrudes toward the static iron core part and forms an extended protrusion, the extended protrusion extends into the U-shaped channel, and the extended protrusion can enter and exit the U-shaped channel along the central axis of the static iron core under the drive of the spin-pressed cover, and control the compression or reset deformation of the first elastic element.

[0021] It can be understood that an external screwing tool inserted into the screwing part is used to drive the screw-on cover to rotate on the static iron core, which makes it easier for users to drive the screw-on cover to rotate on the static iron core, thereby facilitating the adjustment of the braking torque of the electromagnetic brake.

[0022] In one embodiment, the electromagnetic brake further comprises a torque component, which is arranged at the periphery of the spin-on cover and penetrates the static iron core;

[0023] In which, the torque assembly includes an adjusting screw, a flat washer and a second elastic element, the adjusting screw is threaded on the static iron core, the second elastic element is arranged between the moving iron core and the flat washer in a pre-compressed manner, and one end of the flat washer facing away from the second elastic element abuts against an end of the adjusting screw located in the static iron core.

[0024] In one of the embodiments, the electromagnetic brake further includes a guide positioning pin, which is mounted on the static iron core and slidably connected to the moving iron core, and is used to guide the reciprocating motion of the moving iron core relative to the brake disc.

[0025] It can be understood that the guide positioning pin is used to guide the movement of the moving iron core, which can ensure the consistency of the direction of the moving iron core during movement and avoid jamming of the moving iron core during movement. This can prevent the brake disc from being subjected to frictional resistance when the electromagnetic brake is not braking while following the rotation of the motor shaft, thereby ensuring the operating stability of the electromagnetic brake.

[0026] In one embodiment, the electromagnetic brake further includes a transition plate disposed on a side of the brake disc facing away from the moving iron core, and the moving iron core can lock the brake disc to the transition plate;

[0027] Wherein, one end of the guiding and positioning pin facing away from the moving iron core is inserted into the transition plate and is in clearance fit with the transition plate.

[0028] It can be understood that by using the clearance fit between the guiding and positioning pin and the transition plate, the guiding and positioning pin can bear the shear torque force during the braking of the electromagnetic brake, thereby improving the operating stability of the electromagnetic brake.

[0029] This application also provides an escalator motor, including a motor shaft and the electromagnetic brake described above;

[0030] The brake disc is sleeved on the motor shaft and is circumferentially limited to the motor shaft.

[0031] This application also provides an escalator including the escalator motor described above.

[0032] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0033] The electromagnetic brake, escalator motor and escalator claimed in this application utilize the control of the deformation of the first elastic element when the spinning cover rotates on the static iron core to adjust the pressing force of the first elastic element on the moving iron core, so that the braking torque of the electromagnetic brake can be adjusted to meet different torque requirements; during this process, the feedback generated when the pressure regulating column enters and exits the limit groove can be used to prompt the user, which not only improves the operating experience of the user when adjusting the braking torque of the electromagnetic brake, but also provides real-time feedback during the adjustment process of the braking torque of the electromagnetic brake to prevent over-adjustment, thereby avoiding the unidentifiable risk caused by over-adjustment of the electromagnetic brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of the electromagnetic brake provided by this application.

[0036] Figure 2 It is a cross-sectional view of the electromagnetic brake provided by this application.

[0037] Figure 3 For Figure 2 The enlarged view of part P in the figure.

[0038] Figure 4 This is a schematic structural view of the spinning cover and the pressure regulating column in cooperation in the present application.

[0039] Reference numerals: 100, electromagnetic brake; 10, brake disc; 20, moving iron core; 30, static iron core; 31, induction coil; 311, opening groove; 32, U-shaped channel; 40, spinning cover; 401, pressure regulating part; 41, limiting groove; 42, screwing part; 43, scale line; 44, extending convex part; 50, torque adjusting assembly; 51, pressure regulating column; 511, ball head; 512, extending convex column; 52, first elastic element; 60, torque assembly; 61, adjusting screw; 62, flat washer; 63, second elastic element; 70, guiding and positioning pin; 80, transition plate; 90, hollow bolt. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] It should be noted that when an element is referred to as "provided on" another element, it can be directly provided on the other element or there may also be an intermediate element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there may be an intermediate element at the same time. When an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there may be an intermediate element at the same time.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] The electromagnetic brake 100 claimed in the present application specifically refers to a power-off electromagnetic brake applied to the escalator motor of an escalator.

[0044] Such as Figure 1 、 Figure 2As shown, the electromagnetic brake 100 provided in the present application includes a brake disc 10, a moving iron core 20, a stationary iron core 30, an induction coil 31, a spinning cover 40 and a torque adjustment component 50. The brake disc 10 is used to connect the motor shaft (not shown); along the axial direction of the brake disc 10, the moving iron core 20 and the stationary iron core 30 are sequentially arranged on one side of the brake disc 10, and the induction coil 31 is installed on the stationary iron core 30. When the power is on or off, the moving iron core 20 is attracted or released to drive the moving iron core 20 to reciprocate relative to the brake disc 10 and control the locking / unlocking of the brake disc 10; the spinning cover 40 is arranged on the side of the stationary iron core 30 away from the moving iron core 20 and is screwed with the stationary iron core 30. The spinning cover 40 It includes a pressure regulating part 401, and the spin-on cover 40 is provided with a plurality of limiting grooves 41 at the position of the pressure regulating part 401, and the plurality of limiting grooves 41 are arranged at intervals along the circumferential direction of the static iron core 30; the torque adjustment component 50 is arranged through the static iron core 30, and the torque adjustment component 50 includes a pressure regulating column 51 and a first elastic element 52, and the first elastic element 52 is arranged between the moving iron core 20 and the pressure regulating column 51 in a pre-compressed manner, and one end of the pressure regulating column 51 away from the first elastic element 52 abuts against the pressure regulating part 401; when the spin-on cover 40 rotates relative to the static iron core 30, the spin-on cover 40 can drive the first elastic element 52 to deform through the pressure regulating column 51, and make the pressure regulating column 51 enter and exit the limiting groove 41. Here, the pressure regulating column 51 enters and exits the limiting groove 41, specifically, the pressure regulating column 51 enters the limiting groove 41 from other parts of the pressure regulating part 401 except the limiting groove 41, and the pressure regulating column 51 leaves the limiting groove 41 to other parts of the pressure regulating part 401 except the limiting groove 41.

[0045] From the above, it can be seen that the electromagnetic brake 100 of the present application utilizes the control of the deformation of the first elastic element 52 when the rotary pressing cover 40 rotates on the static iron core 30 to achieve the adjustment of the pressing force of the first elastic element 52 on the moving iron core 20, so that the braking torque of the electromagnetic brake 100 can be adjusted to meet different torque requirements; in this process, the feedback generated when the pressure regulating column 51 enters and exits the limiting groove 41 can be utilized to achieve the purpose of prompting the user, which not only improves the user's operating experience when adjusting the braking torque of the electromagnetic brake 100, but also provides real-time feedback during the adjustment process of the braking torque of the electromagnetic brake 100 to prevent excessive adjustment, thereby avoiding the risk of unrecognizable caused by excessive adjustment of the electromagnetic brake 100.

[0046] In the present application, the number of the upper limit grooves 41 on the pressure regulating part 401 of the swivel cover 40 is a plurality, which can be adaptively set according to the usage requirements to ensure that each adjustment of the braking torque of the electromagnetic brake 100 can make the pressure regulating column 51 enter and exit at least two limit grooves 41; the electromagnetic brake 100 of the present application achieves the purpose of adjusting the braking torque by rotating the swivel cover 40. Since the pressure regulating column 51 has a tendency to move towards the pressure regulating part 401 under the elastic pushing of the first elastic element 52, combined with the concave structure of the limit groove 41, using the action and reaction forces, when the pressure regulating column 51 enters and exits the limit groove 41, the pressure regulating column 51 will collide with the pressure regulating part 401 of the swivel cover 40, causing the swivel cover 40 to generate a tactile feeling of pressing on the user in turn and generating a sound, thereby serving the purpose of prompting the user.

[0047] It should be noted that when the swivel cover 40 rotates on the static iron core 30, it can realize the switching of the pressure regulating column 51 between different limit grooves 41 on the swivel cover 40 and control the deformation of the first elastic element 52 to be compressed or reset. In this way, the adjustment angle of the swivel cover 40, the entry and exit of different limit grooves 41 on the swivel cover 40 for the pressure regulating column 51, and the deformation of the first elastic element 52 have a one-to-one correspondence relationship. That is to say, there is a one-to-one correspondence relationship between the adjustment angle of the swivel cover 40 and the pre-compression amount of the first elastic element 52. Specifically, as Figure 1 shown, when the swivel cover 40 rotates clockwise and realizes the switching between two adjacent limit grooves 41, the corresponding adjustment angle of the swivel cover 40 is 20°, and the torque of the first elastic element 52 correspondingly increases by 21 N. Conversely, the torque of the first elastic element 52 correspondingly decreases by 21 N.

[0048] As Figure 2 shown, in an embodiment, the induction coil 31 is assembled into the static iron core 30 in an embedded manner to realize the assembly connection of the induction coil 31 on the static iron core 30. That is to say, the induction coil 31 of this embodiment is received in the static iron core 30, so that the assembly of the induction coil 31 on the static iron core 30 does not occupy space and is convenient for assembling the induction coil 31 onto the static iron core 30.

[0049] As Figure 2 shown, in this embodiment, an opening groove 311 is provided at one end of the static iron core 30 facing away from the swivel cover 40. The opening groove 311 is used to receive the induction coil 31 and realize the assembly of the induction coil 31 in the static iron core 30. Here, the opening groove 311 is arranged on the periphery of the torque adjusting assembly 50. A through groove is provided on the static iron core 30, and the through groove and the opening groove 311 are arranged at intervals, and the torque adjusting assembly 50 is located in the through groove.

[0050] As Figure 3 、 Figure 4As shown, in one embodiment, the pressure regulating column 51 has a ball head 511, and the pressure regulating column 51 can abut against the pressure regulating part 401 through the ball head 511; wherein, the ball head 511 is matched with the limit groove 41. That is to say, the electromagnetic brake 100 of this embodiment can use the ball head 511 to enter and exit the limit groove 41. In this way, by using the structural characteristics of the ball head 511, the frictional resistance when the ball head 511 enters and exits the limit groove 41 can be reduced, so that the ball head 511 on the pressure regulating column 51 can smoothly enter and exit the limit groove 41. Here, the limit groove 41 is configured as an arc groove matching the ball head 511. It can be understood that in other embodiments, the limit groove 41 can also be in other irregular shapes such as an arc shape or a square shape. Of course, the part of the pressure regulating column 51 for abutting against the pressure regulating part 401 can also adopt a convex structure with a square shape, a triangular shape or other regular shapes, which will not be elaborated here.

[0051] As Figure 2 , Figure 4 shown, in one embodiment, the central axis of the spinning cover 40 and the central axis of the static iron core 30 are arranged on the same straight line; wherein, a screwing part 42 is arranged on the spinning cover 40, and the screwing part 42 is used for plugging and matching with an external screwing tool to drive the spinning cover 40 to rotate relative to the static iron core 30. That is to say, the user can act on the screwing part 42 on the spinning cover 40 through an external screwing tool to realize the driving of the spinning cover 40 to rotate on the static iron core 30, so as to facilitate the user to drive the spinning cover 40 to rotate on the static iron core 30. Here, the screwing part 42 is configured with a square groove opened at the rotation center position of the spinning cover 40. It can be understood that in other embodiments, the screwing part 42 can also be configured with a triangular groove opened at the rotation center position of the spinning cover 40, or the screwing part 42 can be configured with a square head protruding from the spinning cover 40 away from the static iron core 30, which will not be elaborated here.

[0052] As Figure 2 , Figure 4 shown, in this embodiment, the part of the spinning cover 40 facing the static iron core 30 protrudes to form an extension protrusion 44. Correspondingly, a U-shaped channel 32 is opened on the static iron core 30. The extension protrusion 44 extends into the U-shaped channel 32 and forms a threaded connection with the U-shaped channel 32, and the extension protrusion 44 can move in and out of the U-shaped channel 32 along the central axis of the static iron core 30 under the drive of the spinning cover 40, and control the first elastic element 52 to undergo compression or reset deformation. Here, the screwing part 42 is arranged at the position of the extension protrusion 44 of the spinning cover 40.

[0053] As Figure 1As shown, in one embodiment, one of the spinning cover 40 and the static iron core 30 is marked with a scale line 43, and the other is provided with a mark (not shown in the figure). The mark can be aligned with the scale line 43, and this is used to guide the adjustment of the rotation of the spinning cover 40 on the static iron core 30, especially to guide the adjustment angle of the rotation of the spinning cover 40 on the static iron core 30. That is to say, the electromagnetic brake 100 of this embodiment can use the scale of the scale line 43 to quantify the rotation angle when the spinning cover 40 rotates on the static iron core 30, and realize the visualization of the braking torque adjustment of the electromagnetic brake 100, so as to improve the accuracy of the braking torque adjustment of the electromagnetic brake 100 to meet the use requirements of the on-site working conditions. Here, the scale line 43 is marked on the spinning cover 40, and the scale line 43 is circular as a whole, and the mark is arranged on the static iron core 30. It can be understood that in other embodiments, the scale line can also be marked on the static iron core 30, and correspondingly, the mark is arranged on the spinning cover 40.

[0054] It should be noted that since the pressing force of the first elastic element 52 on the moving iron core 20 changes linearly, and there is a positive correlation between the rotation angle when the spinning cover 40 rotates on the static iron core 30 and the deformation amount of the first elastic element 52, this enables the user to control the rotation angle when the spinning cover 40 rotates on the static iron core 30, and thus achieve the purpose of controlling different pressing forces of the first elastic element 52 on the moving iron core 20.

[0055] As Figure 2 shown, in one embodiment, the number of the torque adjustment assemblies 50 is configured as multiple groups, and the multiple groups of torque adjustment assemblies 50 are arranged symmetrically about the central axis of the moving iron core 20. This enables the multiple groups of torque adjustment assemblies 50 in the electromagnetic brake 100 to cooperate with each other and jointly achieve the purpose of pushing the moving iron core 20 flatly towards the brake disc 10, so that the moving iron core 20 can be evenly pressed. Here, the number of the torque adjustment assemblies 50 is configured as two groups, three groups, four groups, or even more groups, and no further elaboration will be made here.

[0056] As Figure 3 shown, in one embodiment, an extension convex column 512 is provided on the pressure regulating column 51, and the extension convex column 512 is inserted into the first elastic element 52 and is in plug-in fit with the first elastic element 52, so as to realize the abutting limit between the first elastic element 52 and the pressure regulating column 51, and thus ensure the stability of the power transmission between the pressure regulating column 51 and the first elastic element 52. Here, the first elastic element 52 of this embodiment is configured as a compression spring. It can be understood that in other embodiments, the first elastic element 52 can also be configured as a rubber sleeve or other highly elastic elastic fittings, and no further elaboration will be made here.

[0057] As Figure 2As shown, in one embodiment, the electromagnetic brake 100 further includes a torque assembly 60. The torque assembly 60 is disposed around the spinning cover 40 and penetrates through the static iron core 30. Here, the number of the torque assemblies 60 is configured to be four groups. The four groups of torque assemblies 60 are arranged on the static iron core 30 in a left-right symmetric manner, so that the four groups of torque assemblies 60 cooperate with each other and jointly achieve the purpose of pushing the moving iron core 20 flatly towards the brake disc 10, so that the moving iron core 20 is uniformly pressed. It can be understood that in other embodiments, the number of the torque assemblies 60 can also be three groups, five groups, six groups, or even more groups, which will not be elaborated here.

[0058] As Figure 2 shown, in this embodiment, the torque assembly 60 includes an adjusting screw 61, a flat washer 62, and a second elastic element 63. The adjusting screw 61 is screwed onto the static iron core 30. The second elastic element 63 is disposed between the moving iron core 20 and the flat washer 62 in a pre-compressed manner. One end of the flat washer 62 facing away from the second elastic element 63 abuts against one end of the adjusting screw 61 located inside the static iron core 30. That is to say, in this embodiment, the pressing force of the second elastic element 63 pushing the moving iron core 20 can be adjusted by screwing the adjusting screw 61. Here, the second elastic element 63 is also configured as a compression spring, a rubber sleeve, or other accessories with high elasticity.

[0059] It should be noted that the torque assembly 60 and the torque adjusting assembly 50 of this embodiment are jointly used for the pressing force when pushing the moving iron core 20. Among them, the pressing force of the torque assembly 60 when pushing the moving iron core 20 is set according to the requirement of the braking torque when the electromagnetic brake 100 leaves the factory; when the electromagnetic brake 100 is applied in the field working conditions, specifically, the pressing force of the torque adjusting assembly 50 when pushing the moving iron core 20 can be adjusted by screwing the spinning cover 40, and the purpose of adjusting the braking torque of the electromagnetic brake 100 can be achieved.

[0060] As Figure 2As shown, in one embodiment, the electromagnetic brake 100 further includes a guiding and positioning pin 70. The guiding and positioning pin 70 is installed on the static iron core 30 and is slidably connected to the moving iron core 20, and is used to guide the reciprocating movement of the moving iron core 20 relative to the brake disc 10. That is to say, the electromagnetic brake 100 in this embodiment can use the guiding and positioning pin 70 to guide the movement of the moving iron core 20, so as to ensure the consistency of the direction when the moving iron core 20 makes a reciprocating movement relative to the brake disc 10, and avoid jamming when the moving iron core 20 moves, so as to prevent the brake disc 10 from being subjected to frictional resistance during the rotation following the motor shaft when the electromagnetic brake 100 is not braking, thereby playing a role in ensuring the running stability of the electromagnetic brake 100. Here, the guiding and positioning pin 70 is arranged on the periphery of the brake disc 10 to avoid interference between the guiding and positioning pin 70 and the brake disc 10. Moreover, the guiding and positioning pin 70 is partially inserted into the static iron core 30 and is connected to the static iron core 30 in an interference fit manner. And the moving iron core 20 can specifically adopt a linear bushing to slidably cooperate with the guiding and positioning pin 70.

[0061] It should be noted that if the brake disc 10 is subjected to frictional resistance during the rotation following the motor shaft, by means of friction generating heat, the temperature of the electromagnetic brake 100 will be increased. And with the increase of the temperature of the electromagnetic brake, the electromagnetic performance of the electromagnetic brake 100 will be weakened, thereby reducing the service life of the electromagnetic brake 100.

[0062] In this embodiment, the number of the guiding and positioning pins 70 is configured to be two. The two guiding and positioning pins 70 can simultaneously guide the movement of the moving iron core 20 to ensure the stability of the movement of the moving iron core 20. It can be understood that in other embodiments, the number of the guiding and positioning pins 70 can also be configured to be three, four, or even more, which will not be elaborated here.

[0063] As Figure 2 shown, in one embodiment, the electromagnetic brake 100 further includes a transition plate 80. The transition plate 80 is arranged on the side of the brake disc 10 facing away from the moving iron core 20, and the moving iron core 20 can lock the brake disc 10 to the transition plate 80; wherein, the end of the guiding and positioning pin 70 facing away from the moving iron core 20 is inserted into the transition plate 80 and is in clearance fit with the transition plate 80. So that the guiding and positioning pin 70 can bear the shear torque force when the electromagnetic brake 100 brakes, thereby playing a role in improving the running stability of the electromagnetic brake 100. Here, the transition plate 80 is specifically used to be connected to the housing of the escalator motor.

[0064] It should be noted that the electromagnetic brake 100 of the present application further includes a connection assembly. The connection assembly includes a hollow bolt 90 and a connection bolt (not shown in the figure). The hollow bolt 90 penetrates through the moving iron core 20. One end of the hollow bolt 90 passing through the moving iron core 20 is connected to the static iron core 30 in a threaded manner, and the other end of the hollow bolt 90 abuts against the transition plate 80. Moreover, a connection bolt is installed inside the hollow bolt 90, and the part of the connection bolt extending out of the hollow bolt 90 is screwed to the transition plate 80, so as to realize the assembly and fixation between the transition plate 80 and the static iron core 30. For those skilled in the art, it can be undoubtedly determined that the gap between the threaded section of the hollow bolt 90 located inside the moving iron core 20 and the moving iron core 20 is large and cannot guide the movement of the moving iron core 20. Similarly, the gap between the threaded section of the connection bolt located inside the transition plate 80 and the transition plate 80 is also large. And when the moving iron core 20 locks the brake disc 10 to the transition plate 80 and the rotating brake disc 10 is braked to a stop, during this process, the connection bolt in the connection assembly needs to bear a large shear torque force. Since the overall size of the connection bolt is small, it is easy to break due to the large shear and torsional force, resulting in a braking failure of the electromagnetic brake 100. Obviously, the electromagnetic brake 100 of the present application can well solve the above-mentioned technical problems by setting the guiding and positioning pin 70, and play a role in improving the service life of the electromagnetic brake 100.

[0065] As can be seen from the above, when the induction coil 31 is in the energized state, the moving iron core 20 will move towards the static iron core 30 under the action of the magnetic field generated when the induction coil 31 is energized and adsorb to the static iron core 30. At this time, the pressure on the brake disc 10 is removed and it can rotate with the motor shaft. When the induction coil 31 is de-energized, the moving iron core 20 can move towards the brake disc 10 under the pushing of the first elastic element 52 and the second elastic element 63, and lock the brake disc 10 on the transition plate 80, thereby controlling the motor shaft to stop rotating.

[0066] The present application also provides an escalator motor, including a motor shaft, and the above-mentioned electromagnetic brake 100. The brake disc 10 is sleeved on the motor shaft and is circumferentially limited to the motor shaft.

[0067] In addition, the present application also provides an escalator, including the above-mentioned escalator motor.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0069] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as appropriate changes and variations are made to the above embodiments within the spirit and scope of the present invention, they fall within the scope of protection required by the present invention.

Claims

1. An electromagnetic brake, characterized in that, The electromagnetic brake (100) includes: A brake disc (10) for connecting to the motor shaft; A moving iron core (20), a stationary iron core (30), and an induction coil (31). Along the axial direction of the brake disc (10), the moving iron core (20) and the stationary iron core (30) are sequentially arranged on one side of the brake disc (10). The induction coil (31) is installed on the stationary iron core (30). In the case of power-on or power-off, by attracting or releasing the moving iron core (20), the moving iron core (20) is driven to make a reciprocating motion relative to the brake disc (10), and the locking / unlocking of the brake disc (10) is controlled; A swaging cover (40) is provided on the side of the stationary iron core (30) facing away from the moving iron core (20) and is screwed to the stationary iron core (30). The swaging cover (40) includes a pressure regulating portion (401). The swaging cover (40) is provided with a plurality of limit grooves (41) at the position of the pressure regulating portion (401). The plurality of limit grooves (41) are arranged at intervals along the circumferential direction of the stationary iron core (30); A torque adjusting assembly (50) is arranged through the stationary iron core (30). The torque adjusting assembly (50) includes a pressure regulating column (51) and a first elastic element (52). The first elastic element (52) is arranged between the moving iron core (20) and the pressure regulating column (51) in a pre-compressed manner. One end of the pressure regulating column (51) facing away from the first elastic element (52) abuts against the pressure regulating portion (401); When the swaging cover (40) rotates relative to the stationary iron core (30), the swaging cover (40) can drive the first elastic element (52) to deform through the pressure regulating column (51), and make the pressure regulating column (51) enter and exit the limit groove (41).

2. The electromagnetic brake according to claim 1, characterized in that, The pressure regulating column (51) has a ball head (511), and the pressure regulating column (51) can abut against the pressure regulating portion (401) through the ball head (511); Wherein, the ball head (511) is arranged to match the limit groove (41).

3. The electromagnetic brake according to claim 1, characterized in that, One of the swaging cover (40) and the stationary iron core (30) is marked with a scale line (43), and the other is provided with a mark. The mark can be aligned with the scale line (43), and this is used to guide the adjustment of the rotation of the swaging cover (40) on the stationary iron core (30).

4. The electromagnetic brake according to claim 1, wherein The number of the torque adjusting assemblies (50) is configured as multiple groups, and the multiple groups of torque adjusting assemblies (50) are arranged centrosymmetrically with respect to the central axis of the moving iron core (20).

5. The electromagnetic brake according to claim 1, characterized in that, The central axis of the swaging cover (40) and the central axis of the stationary iron core (30) are arranged on the same straight line; the swaging cover (40) is provided with a screwing portion (42), and the screwing portion (42) is used for plugging and matching with an external screwing tool to drive the swaging cover (40) to rotate relative to the stationary iron core (30); Among them, a U-shaped channel (32) is formed on the static iron core (30). A part of the spinning cover (40) protrudes towards the static iron core (30) and forms an extended convex part (44). The extended convex part (44) extends into the U-shaped channel (32), and the extended convex part (44) can move in and out of the U-shaped channel (32) along the central axis of the static iron core (30) driven by the spinning cover (40), and control the compression or reset deformation of the first elastic element (52).

6. The electromagnetic brake according to claim 1, characterized in that, The electromagnetic brake (100) further includes a torque assembly (60). The torque assembly (60) is arranged around the spinning cover (40) and penetrates through the static iron core (30). Among them, the torque assembly (60) includes an adjusting screw (61), a flat washer (62) and a second elastic element (63). The adjusting screw (61) is screwed on the static iron core (30). The second elastic element (63) is arranged between the moving iron core (20) and the flat washer (62) in a pre-compressed manner. One end of the flat washer (62) facing away from the second elastic element (63) abuts against one end of the adjusting screw (61) located inside the static iron core (30).

7. The electromagnetic brake according to claim 1, characterized in that, The electromagnetic brake (100) further includes a guiding and positioning pin (70). The guiding and positioning pin (70) is installed on the static iron core (30) and is slidably connected to the moving iron core (20) for guiding the reciprocating movement of the moving iron core (20) relative to the brake disc (10).

8. The electromagnetic brake according to claim 7, wherein The electromagnetic brake (100) further includes a transition plate (80). The transition plate (80) is arranged on the side of the brake disc (10) away from the moving iron core (20), and the moving iron core (20) can lock the brake disc (10) to the transition plate (80). Among them, one end of the guiding and positioning pin (70) facing away from the moving iron core (20) is inserted into the transition plate (80) and is in clearance fit with the transition plate (80).

9. An escalator motor, characterized in that, Including a motor shaft and the electromagnetic brake (100) according to any one of claims 1 to 8; The brake disc (10) is sleeved on the motor shaft and is circumferentially limited to the motor shaft.

10. An escalator, characterized in that, Including the escalator motor according to claim 9.

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