Braking mechanism, braking method, engineering motor and elevator

Abstract

The present application provides a braking mechanism, a braking method, an engineering motor and an elevator, wherein the braking mechanism comprises a driving disc, a brake disc, a ball, a friction seat and an elastic limiting structure, wherein the driving disc is linked to the motor, the brake disc is coaxially arranged with the driving disc and can slide axially, the driving disc is provided with a plurality of circular grooves; the brake disc is provided with a conical groove which is opposite to and corresponds to the circular groove one by one, the ball is rotatably arranged in an accommodating space formed by the circular groove and the conical groove; the brake disc is provided with a first friction surface, the friction seat is provided with a second friction surface which contacts the first friction surface to achieve braking, the elastic limiting structure is axially slidably connected with the brake disc, the state of the elastic member is controlled according to the torque difference between the driving disc and the brake disc, and then the contact state of the two friction surfaces is controlled to achieve braking, and no practical electromagnet and its complex control circuit are required, the structure is simple and the braking effect is good.

Description

Technical Field

[0001] The present application relates to the technical field of electric escalators, and in particular to a braking mechanism, a braking method of the braking mechanism, an engineering motor having the braking mechanism, and an elevator. Background Art

[0002] At present, electromagnetic brakes are widely used in the braking of escalators. For example, the Chinese invention patent with the authorization announcement number CN103518073B discloses an electromagnetic brake, which includes: a frame part; an armature part, which is movably mounted on the frame part and has a magnetic core; one or more spring elements, which are used to actuate the brake by moving the armature part forward; an electromagnet, which is assembled to the frame part and is configured to release the brake by pulling the armature part backward against the one or more spring elements; and an elastically bendable planar damping plate, which is suitable for being bent when the armature part moves, and while being bent, is used to generate a damping force (Fd) that resists bending to reduce brake noise. However, this type of brake needs to rely on electricity to control the magnetic force of the electromagnet to achieve braking or release braking. The structure is complex, and the on-off point of the electromagnet often depends on the control circuit. If the control circuit fails, it will affect the normal operation of the elevator. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the current brakes, the present application provides a braking mechanism that does not require the use of an electromagnet and its control circuit, has a simple structure, and has a good braking effect.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] A braking mechanism, comprising:

[0006] A driving disc, the driving disc is linked to the motor, and a plurality of circular grooves are provided on the opposite surfaces of the driving disc and the brake disc;

[0007] The brake disc is coaxially arranged with the driving disc and can slide axially; the brake disc is provided with a conical groove corresponding to the circular groove one by one, and the conical groove is arranged opposite to the circular groove to form a accommodating space with a variable distance; the outer circumferential wall of the brake disc is provided with a first friction surface;

[0008] A ball, the ball being rotatably disposed in the accommodating space;

[0009] A friction seat, the friction seat is fixedly connected to the mounting site, and an inner circumferential wall of the friction seat is provided with a second friction surface that contacts the first friction surface to achieve braking;

[0010] An elastic limiting structure comprises an axial member, an elastic member and a limiting member. The axial member is axially arranged, one end of which is slidably connected to the brake disc, and the other end is connected to the power output mechanism. The limiting member is fixedly connected to the axial member. The elastic member is sleeved on the axial member, one end of which is limited by the brake disc, and the other end is limited by the limiting member. When the elastic member is deformed or reset, the brake disc slides axially to make the first friction surface contact or separate from the second friction surface.

[0011] The ball is confined in the accommodation space defined by the circular groove and the conical groove. When the drive disc starts to rotate under the action of the motor, the ball rotates together with the drive disc. Due to the torque difference between the drive disc and the brake disc, the ball deviates from the original rotation axis, and the ball generates an axial thrust on the outer conical surface of the conical groove surface. The elastic member is compressed under the pressure of the ball, and the brake disc slides axially away from the drive disc. The first friction surface moves downward and separates from the second friction surface, and the brake is released. Similarly, when braking is required, the motor stops rotating, the torque difference between the drive disc and the brake disc disappears, and the elastic force generated by the compressed spring recovery deformation pushes the ball back to the original rotation axis. The axial thrust of the ball on the conical groove surface disappears, and the brake disc slides axially under the push of the elastic force and approaches the drive disc. The first friction surface is pressed against the second friction surface to achieve braking.

[0012] The above scheme does not require the use of electromagnets and their complex control circuits, but instead utilizes the torque difference between the driving disc and the brake disc when the driving disc inputs a rotational torque and loses a rotational torque to control the movement state of the ball, thereby controlling the deformation degree of the elastic member to achieve a braking effect. The structure is simple and the braking effect is good.

[0013] The power output mechanism refers to a mechanism that rotates synchronously with the brake disc and is used to transmit the power of the brake disc. For example, it can be a reducer or other synchronous rotating parts that transmit power to the brake disc.

[0014] Preferably, the friction seat includes a friction plate, a friction arm and a friction arm seat, the friction plate is arranged to be in an arc shape matching with the first friction surface, the second friction surface is the inner side wall of the friction plate, the inner side wall of the friction arm is provided with an arc surface adapted to the outer side wall of the friction plate, the friction plate and the arc surface are detachably connected, the side wall of the friction arm seat is provided with a mounting hole, the friction plate passes through the mounting hole and matches with the first friction surface, the friction arm is fixedly connected to the friction seat, and by providing a detachable friction plate, the friction effect between the first friction surface and the second friction surface can be ensured, thereby preventing the first friction surface and the second friction surface from being worn out due to long-term use and losing the braking effect.

[0015] Preferably, the elastic member is a compression spring or a spring.

[0016] Preferably, the circular grooves are evenly distributed on a circle with equal radius. By evenly distributing the circular grooves with equal diameters, the motion state of each ball can be kept consistent, so that the force on the brake disc is even and the motion state is stable.

[0017] Preferably, a limiting groove is provided at the joint between the brake disc and the elastic member, and the end of the elastic member extends into the limiting groove. The limiting groove can limit the end of the elastic member during the rotation of the brake disc to prevent it from making noise due to vibration or collision with other parts.

[0018] Preferably, the limiting member has a first bottom plate and a first limiting edge, the first limiting edge is arranged on a side where the first bottom plate abuts against the elastic member, and the limiting member is fixedly connected to the axial member via the first bottom plate.

[0019] Preferably, the position-limiting member further comprises a safety seat, the safety seat having a second bottom plate and a second position-limiting edge, the second position-limiting edge being arranged on one side of the first bottom plate and fixedly connected to the second bottom plate, the safety seat being fixedly connected to the axial member via the second bottom plate. The safety seat is used to reinforce the position-limiting member to ensure the braking effect.

[0020] Preferably, the driving disk comprises a first disk surface, a transmission shaft hole is provided at the center of the first disk surface, the driving disk is linked to the motor output shaft through the transmission shaft hole, and the circular groove is provided on the lower surface of the first disk surface. The driving disk is an active disk directly connected to the motor output shaft.

[0021] Preferably, the transmission shaft hole includes a first shaft hole and a second shaft hole coaxially arranged up and down, the inner diameter of the first shaft hole is smaller than the inner diameter of the second shaft hole, a first step is formed at the transition between the first shaft hole and the second shaft hole, the motor output shaft is provided with a second step, the motor output shaft cooperates with the first shaft hole, and the upper surface of the drive disk is blocked by the second step; the second shaft hole cooperates with the cover, and the upper surface of the cover is blocked by the first step, the cover is connected to the motor output shaft by a hexagon socket screw, and a first flat key is provided between the first shaft hole and the motor output shaft to realize the synchronous rotation of the drive disk and the motor output shaft. The axial limit of the drive disk is realized by the first step and the second step, and the synchronous rotation of the drive disk and the motor output shaft is realized by the first flat key, so that the linkage connection between the drive disk and the motor output shaft is realized.

[0022] Preferably, the driving disk includes a second disk surface, a first rotating shaft hole is provided at the center of the second disk surface, the driving disk is rotatably connected to the rotating shaft through the first rotating shaft hole, a sprocket is provided on the outer circumferential wall of the second disk surface, the driving disk is driven by the motor through the sprocket and the chain, and the circular groove is provided on the lower surface of the second disk surface. The driving disk is a driven wheel driven by the output shaft of the motor through a chain, and a transmission sprocket is also provided on the output shaft of the motor.

[0023] Preferably, the power output mechanism is a reducer, the axial member is the input shaft of the reducer, the reducer is coaxially arranged with the motor, the brake disc is slidably connected with the reducer input shaft through a spline, the limiter is fixedly connected with the reducer input shaft, and the elastic member is sleeved between the brake disc and the limiter. The power on the brake disc is output through the reducer, and the reducer input shaft serves as an axial member to provide a location for the installation of the elastic member and the limiter. In addition, in order to make the rotation effect of the brake disc more stable, the reducer input shaft is arranged adjacent to the motor output shaft but not in contact.

[0024] Preferably, the driving disc is a first sprocket, and the power output mechanism is a second sprocket, the first sprocket is a ring-shaped sprocket, the outer circumferential wall of the ring-shaped sprocket is provided with sprocket teeth, and the lower surface of the ring-shaped sprocket is provided with a circular groove; the second sprocket has a third disc surface and sprocket teeth, an annular shaft ring and an axial member arranged on the third disc surface, a third step is provided on the outer circumferential wall of the annular shaft ring, the upper end of the first sprocket is blocked and limited by the third step, a rotating shaft is provided at the center position of the third disc surface, the sprocket teeth are arranged on the outer circumferential wall of the third disc surface, the axial member and the annular shaft ring are fixed to one side of the third disc surface, and extend toward the brake disc, and the axial member is arranged on the inner side of the annular shaft ring; the brake disc is from the outside to the inside A first friction surface, a first connecting surface and a second connecting surface are provided in sequence, the first friction surface is arranged on the outer circumferential wall of the brake disc, the second connecting surface is arranged on the inner side of the annular shaft ring and is parallel to the third disc surface, the second connecting surface is provided with a first through hole for the axial member to pass through, and a second through hole for the rotating shaft to pass through, the first connecting surface connects the first friction surface and the second connecting surface along the lower end of the first sprocket, the lower end of the annular shaft ring and the inner side wall of the annular shaft ring, the conical groove is provided at the position corresponding to the first connecting surface and the circular groove, the conical groove and the circular groove form an accommodating space, the ball is provided in the accommodating space, and the first connecting surface and the annular shaft ring are transmitted by a second flat key.

[0025] The first sprocket is in contact with the brake disc through the ball. When the first sprocket is started, there is a torque difference between the brake wheel and the first sprocket. The torque difference causes the ball to deviate from the original axis. The ball generates an axial thrust on the outer conical surface of the conical groove surface. When the axial thrust is greater than the elastic force of the elastic member, the elastic member is compressed, and the brake disc slides axially away from the second sprocket and the first sprocket. The first friction surface is separated from the second friction surface, and the brake is released. Thereafter, the second sprocket, the ball and the brake disc are integrated, and the rotational motion is transmitted to the second sprocket through the flat key arranged between the annular shaft ring and the brake disc. The second sprocket drives the escalator to run through the sprocket teeth.

[0026] Preferably, the inner circumferential wall of the first sprocket is provided with a fourth step, the fourth step cooperates with the annular shaft ring to form an annular groove, the first connecting surface is provided with an annular protrusion that cooperates with the annular groove, the conical groove is arranged on the top surface of the annular protrusion, and the circular groove is arranged at a position corresponding to the conical groove. Since the first sprocket has specification restrictions during specific use, the size of the first sprocket and the second sprocket can be adjusted by setting the fourth step; in addition, space can also be saved by setting the step.

[0027] Preferably, a first flat key groove is provided on the inner circumferential wall of the annular shaft ring, a second flat key groove is provided on the surface opposite to the first connecting surface and the inner wall of the annular shaft ring, and a flat key is provided in a space formed by the cooperation of the first flat key groove and the second flat key groove. The flat key groove is provided on the inner wall of the annular shaft ring, which can increase the specification and strength of the flat key and achieve a better effect of kinetic energy transmission.

[0028] Preferably, the axial member is a screw rod or a straight rod.

[0029] The present application also provides a braking method, comprising the following steps:

[0030] The motor drives the driving disc to rotate, a torque difference is generated between the driving disc and the brake disc, the ball deviates from the original rotation axis, the ball generates an axial thrust on the outer conical surface of the conical groove surface, the elastic member is compressed under the pressure of the ball, the brake disc slides axially away from the driving disc, the first friction surface moves downward and separates from the second friction surface, and the brake is released;

[0031] When the motor stops rotating, the torque difference between the driving disc and the brake disc disappears, and the elastic force generated by the recovery deformation of the compressed spring pushes the ball back to the original rotation axis. The axial thrust of the ball on the conical groove surface disappears, and the brake disc slides axially under the push of the elastic force and approaches the driving disc. The first friction surface is pressed against the second friction surface to achieve braking.

[0032] The present application also provides an engineering motor, which includes the braking mechanism as described above.

[0033] The present application also provides an elevator, which includes the braking mechanism as described above, wherein the elevator is a traction-type vertical elevator, a forced-drive vertical elevator, or an escalator.

[0034] Advantages of the implementation of the present application: The present application provides a braking mechanism, including a driving disc, a brake disc, a ball, a friction seat and an elastic limiting structure, wherein the driving disc is linked to a motor, and a plurality of circular grooves are arranged on the opposite surfaces of the driving disc and the brake disc; the brake disc is coaxially arranged with the driving disc and can slide axially; the brake disc is provided with a conical groove corresponding to the circular groove one by one, and the conical groove is arranged opposite to the circular groove to form a accommodating space with a variable distance; the outer circumferential wall of the brake disc is provided with a first friction surface; the ball is rotatably arranged in the accommodating space; the friction seat is fixedly connected to the mounting site, and the inner circumferential wall thereof is provided with a second friction surface that contacts the first friction surface to achieve braking; the elastic limiting structure is axially slidably connected with the brake disc, and the elastic limiting structure controls the movement direction and movement distance of the brake disc according to the torque difference between the driving disc and the brake disc, thereby controlling the contact state of the two friction surfaces to achieve braking, and does not require practical electromagnets and their complex control circuits, has a simple structure, and has a good braking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a schematic diagram of the appearance of a braking mechanism described in an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the disassembled structure of a brake mechanism described in an embodiment of the present application;

[0038] Figure 3 A cross-sectional schematic diagram of a brake mechanism described in an embodiment of the present application;

[0039] Figure 4 This is a schematic structural diagram of a driving disc of a brake mechanism according to an embodiment of the present application;

[0040] Figure 5 A cross-sectional view of a driving disc of a brake mechanism according to an embodiment of the present application;

[0041] Figure 6 for Figure 3 An enlarged schematic diagram of region A;

[0042] Figure 7 This is a schematic diagram of the structure of a motor shaft of a braking mechanism described in an embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of the top surface structure of a brake disc of a brake mechanism according to an embodiment of the present application;

[0044] Fig. 9 This is a schematic diagram of the bottom structure of a brake disc of a brake mechanism according to an embodiment of the present application;

[0045] Fig.10 This is a schematic structural diagram of a stopper of a brake mechanism according to an embodiment of the present application;

[0046] Fig.11 This is a structural schematic diagram of a safety seat of a brake mechanism according to an embodiment of the present application;

[0047] Fig.12 This is a schematic diagram of the installation of a brake mechanism described in an embodiment of the present application;

[0048] Fig.13 This is a schematic diagram of the disassembled structure of a brake mechanism described in an embodiment of the present application;

[0049] Fig.14 A cross-sectional view of a brake mechanism according to an embodiment of the present application;

[0050] Fig.15 This is a schematic diagram of the installation of a brake mechanism described in an embodiment of the present application;

[0051] Fig.16 A schematic structural diagram of a first sprocket of a braking mechanism according to an embodiment of the present application;

[0052] Fig.17 A schematic diagram of the structure of a brake disc of a brake mechanism according to an embodiment of the present application;

[0053] Fig.18 A schematic diagram of the structure of a brake disc of a brake mechanism according to an embodiment of the present application;

[0054] Fig.19 A cross-sectional view of a brake disc of a brake mechanism according to an embodiment of the present application;

[0055] Fig. 20 A schematic diagram of the structure of a second sprocket of a braking mechanism according to an embodiment of the present application;

[0056] Fig.21A cross-sectional view of a second sprocket of a braking mechanism according to an embodiment of the present application;

[0057] Fig. 22 This is a schematic diagram of the appearance of a braking mechanism described in an embodiment of the present application;

[0058] Fig.23 This is a schematic structural diagram of a second friction surface of a braking mechanism according to an embodiment of the present application;

[0059] Fig.24 This is a schematic structural diagram of a second friction surface of a braking mechanism described in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] like Figures 1 to 24 As shown, a braking mechanism comprises:

[0062] A driving disc 1, wherein the driving disc 1 is linked to the motor 6, and a plurality of circular grooves 11 are provided on the opposite surfaces of the driving disc 1 and the brake disc 2;

[0063] The brake disc 2 is coaxially arranged with the drive disc 1 and can slide along the axial member 51; the brake disc 2 is provided with a conical groove 21 corresponding to the circular groove 11 one by one, and the conical groove 21 is arranged opposite to the circular groove 11 to form a accommodating space with a variable distance; the outer circumferential wall of the brake disc 2 is provided with a first friction surface 22;

[0064] A ball 3, wherein the ball 3 is rotatably disposed in the accommodating space;

[0065] A friction seat 4, wherein the inner circumferential wall of the friction seat 4 is provided with a second friction surface 41 that contacts the first friction surface 22 to achieve braking;

[0066] An elastic limiting structure 5 is used to control the direction and distance of the axial movement of the brake disc 2. In some embodiments of the present application, the elastic limiting structure 5 includes an axial member 51, an elastic member 52 and a limiting member 53. The axial member 51 is axially arranged, one end of which is slidably connected to the brake disc 2, and the other end is connected to the power output mechanism 7. The limiting member 53 is fixedly connected to the axial member 51. The elastic member 52 is sleeved on the axial member 51, one end of which is limited by the brake disc 2, and the other end is limited by the limiting member 53. When the elastic member 52 is deformed or reset, the brake disc 2 slides axially to make the first friction surface 22 and the second friction surface 41 contact or separate.

[0067] The ball 3 is confined in the accommodation space defined by the circular groove 11 and the tapered groove 21. When the drive disc 1 starts to rotate under the action of the motor 6, the ball 3 rotates together with the drive disc 1, and the brake disc 2 does not rotate. Due to the torque difference between the drive disc 1 and the brake disc 2, the ball 3 deviates from the original rotation axis and acts on the conical surface of the tapered groove 21. The elastic limiting structure 5 is compressed under the pressure of the ball 3, thereby causing the brake disc 2 to slide axially away from the drive disc 1, and the first friction surface 22 moves downward and separates from the second friction surface 41, thereby releasing the brake. Similarly, when braking is required, the motor 6 stops rotating, the torque difference between the drive disc 1 and the brake disc 2 disappears, the ball 3 returns to the original rotation axis, the elastic member 52 resets, and pushes the brake disc 2 to slide axially close to the drive disc 1, and the first friction surface 22 is pressed against the second friction surface 41, thereby achieving braking.

[0068] The above scheme does not require practical electromagnets and their complex control circuits, but uses the torque difference between the drive disk 1 and the brake disk 2 when the drive disk 1 inputs torque and loses torque to control the movement state of the ball 3, and then controls the deformation state of the elastic member 52 to achieve the braking effect. It has a simple structure and good braking effect.

[0069] The elastic member 52 may be a compression spring or a spring sheet, and the shape of the spring sheet may be selected according to the magnitude of the pressure, for example, a Z-shaped spring sheet may be selected.

[0070] In some embodiments of the present application, in order to ensure the friction effect between the first friction surface 22 and the second friction surface 41 and prevent the first friction surface 22 and the second friction surface 41 from being worn out due to long-term use and losing the braking effect, such as Figure 1 , Figure 2 , Fig.23 and Fig.24As shown, the friction seat 4 includes a friction plate 42, a friction arm 43 and a friction arm seat 44. The friction plate 42 is arranged in an arc shape matching with the first friction surface. The second friction surface is the inner side wall of the friction plate 42. The inner side wall of the friction arm 43 is provided with an arc surface adapted to the outer side wall of the friction plate 42. The friction plate 42 and the arc surface are detachably connected. The side wall of the friction arm seat 44 is provided with a mounting hole. The friction plate 42 passes through the mounting hole and matches with the first friction surface. The friction arm 43 is fixedly connected with the friction seat 4. The connection method of the friction arm 43 and the friction seat 4 can be bolt connection, or it can be a common fixed connection method such as welding and clamping. The welding is firm and the bolt connection can be detached. For example, threaded holes can be provided at both ends of the friction arm 43 for mounting bolts.

[0071] In order to keep the motion state of each ball 3 consistent, to make the brake disc 2 evenly stressed and to stabilize the motion state, in some embodiments of the present application, the circular grooves 11 are evenly distributed on a circle with equal radius.

[0072] During the rotation of the driving disc 1 and the brake disc 2, the elastic member 52 will vibrate and collide with the axial member 51 or other parts to produce noise. To avoid such noise, in some embodiments of the present application, a limiting groove 23 is provided at the matching position of the brake disc 2 and the elastic member 52, and the end of the elastic member 52 extends into the limiting groove 23. The limiting groove 23 limits one end of the elastic member 52.

[0073] The limiting member 53 is used to axially limit one end of the elastic member 52 so that the elastic member 52 deforms under the action of pressure instead of moving downward. There are many ways to set it. For example, the limiting member 53 can be a nut threadedly connected to the axial member 51, or a sheet member vertically welded to the axial member 51. In some embodiments of the present application, the limiting member 53 has a first bottom plate 531 and a first limiting edge 532. The first limiting edge 532 is arranged on the side where the first bottom plate 531 abuts against the elastic member 52. The limiting member 53 is fixedly connected to the axial member 51 through the first bottom plate 531. The limiting member 53 limits one end of the elastic member 52. The first bottom plate 531 is threadedly connected to the reducer input shaft of the axial member 51 through a thread.

[0074] In order to reinforce the limiter 53, the limiter 53 further includes a safety seat 54, and the safety seat 54 may also have a variety of structures, and may be a nut threadedly connected to the axial member 51. In some embodiments of the present application, the safety seat 54 has a second bottom plate 541 and a second limit edge 542, and the second limit edge 542 is arranged on one side of the first bottom plate 531 and fixedly connected to the second bottom plate 541, and the safety seat 54 is fixedly connected to the axial member 51 through the second bottom plate 541. The second bottom plate 541 is threadedly connected to the reducer input shaft of the axial member 51 through a thread.

[0075] The drive disk 1 can be arranged in a variety of ways, and can be an active disk directly connected to the output shaft of the motor 6, such as Fig.12 As shown, it can also be a driven disk driven by the motor 6, such as Fig.15 In some embodiments of the present application, Figure 4 and Figure 5 As shown, the driving disk 1 includes a first disk surface, a transmission shaft hole 12 is provided at the center of the first disk surface, the driving disk 1 is linked to the motor output shaft 66 through the transmission shaft hole 12, and the circular groove 11 is provided on the lower surface of the first disk surface. The driving disk 1 is an active disk directly connected to the motor output shaft 66. The linkage connection can adopt the commonly used linkage method with the motor 6 rotating shaft, for example, the linkage can be realized by adopting the following structure. Figure 6 and Figure 7 As shown, the transmission shaft hole 12 includes a first shaft hole 12a and a second shaft hole 12b which are coaxially arranged up and down, the inner diameter of the first shaft hole 12a is smaller than the inner diameter of the second shaft hole 12b, and a first step 64 is formed at the transition between the first shaft hole 12a and the second shaft hole 12b, and the motor output shaft 66 is provided with a second step 61, and the motor output shaft 66 cooperates with the first shaft hole 12a, and the upper surface of the drive disk 1 is blocked by the second step 61; the second shaft hole 12b cooperates with the cover 62, and the upper surface of the cover 62 is blocked by the first step 64, and the cover 62 is connected to the motor output shaft 66 by a hexagon socket screw 63, and a first flat key 65 is provided between the first shaft hole 12a and the motor output shaft 66 to realize the synchronous rotation of the drive disk 1 and the motor output shaft 66. The first step 64 and the second step 61 are blocked to achieve axial limitation of the drive disk 1 , and the first flat key 65 is used to achieve synchronous rotation of the drive disk 1 and the motor output shaft 66 , thereby achieving a linkage connection between the drive disk 1 and the motor output shaft 66 .

[0076] In some other embodiments of the present application, the driving disk 1 includes a second disk surface, a first rotating shaft hole is provided at the center of the second disk surface, the driving disk 1 is rotatably connected to the rotating shaft through the first rotating shaft hole, a sprocket is provided on the outer circumferential wall of the second disk surface, the driving disk 1 is driven by the motor 6 through the sprocket and the chain, and the circular groove 11 is provided on the lower surface of the second disk surface. The driving disk 1 is a driven wheel driven by the output shaft of the motor 6 through a chain, and a transmission sprocket is also provided on the output shaft of the motor 6.

[0077] The power output mechanism 7 refers to a mechanism that rotates synchronously with the brake disc 2 and is used to transmit the power of the brake disc 2. It can be a reducer or other rotating parts that are coaxially arranged with the brake disc 2 and can transmit power. Figures 1 to 3 As shown, the power output mechanism 7 is a reducer, the axial member 51 is the input shaft of the reducer, the reducer is coaxially arranged with the motor 6, the brake disc 2 is slidably connected with the input shaft of the reducer through a spline, the limiter is fixedly connected with the input shaft of the reducer, and the elastic member 52 is sleeved between the brake disc 2 and the limiter 53. The power on the brake disc 2 is output through the reducer, and the input shaft of the reducer serves as the axial member 51, providing a location for the installation of the elastic member 52 and the limiter 53. In addition, in order to make the rotation effect of the brake disc 2 more stable, the input shaft of the reducer is arranged adjacent to but not in contact with the output shaft 66 of the motor.

[0078] In some other embodiments of the present application, the power output mechanism 7 is a rotating member coaxially arranged with the brake disc 2 and capable of transmitting power. Figures 13 to 22 As shown, the driving disc 1 is the first sprocket 1A, and the power output mechanism 7 is the second sprocket 7A. Fig.16 As shown, the first sprocket 1A is a ring-shaped sprocket, and the outer circumferential wall of the ring-shaped sprocket is provided with sprocket teeth, and the lower surface of the ring-shaped sprocket is provided with a circular groove 11; Fig. 20 and Fig.21 As shown, the second sprocket 7A has a third disc surface 7A1 and sprockets, an annular shaft ring 7A2 and an axial member 51 arranged on the third disc surface 7A1, a third step 7A3 is arranged on the outer circumferential wall of the annular shaft ring 7A2, the upper end of the first sprocket 1A is blocked and limited by the third step 7A3, a rotating shaft 7A4 is arranged at the center of the third disc surface 7A1, the sprockets are arranged on the outer circumferential wall of the third disc surface 7A1, the axial member 51 and the annular shaft ring 7A2 are fixed on one side of the third disc surface 7A1, and extend toward the brake disc 2, and the axial member 51 is arranged on the inner side of the annular shaft ring 7A2; as shown Fig.17 , Fig.18 and Fig.19As shown, the brake disc 2 is provided with a first friction surface 22, a first connecting surface 24 and a second connecting surface 25 in sequence from the outside to the inside, the first friction surface 22 is arranged on the outer circumferential wall of the brake disc 2, the second connecting surface 25 is arranged on the inner side of the annular shaft ring 7A2 and is parallel to the third disc surface 7A1, the second connecting surface 25 is provided with a first through hole 251 for the axial member 51 to pass through, and a second through hole 252 for the rotating shaft 7A4 to pass through, the first connecting surface 24 connects the first friction surface 22 and the second connecting surface 25 along the lower end of the first sprocket 1A, the lower end of the annular shaft ring 7A2 and the inner side wall of the annular shaft ring 7A2, the conical groove 21 is arranged at the first connecting surface 24 corresponding to the circular groove 11, and the first connecting surface 24 and the annular shaft ring 7A2 are transmitted by a second flat key.

[0079] The first sprocket 1A contacts the brake disc 2 through the ball 3. When the first sprocket 1A is started, there is a torque difference between the brake wheel and the first sprocket 1A. The torque difference causes the ball 3 to deviate from the original rotation axis and act on the conical surface of the conical groove 21 of the brake disc 2 to generate an axial thrust. When the axial thrust is greater than the elastic force of the elastic member 52, the elastic member 52 is compressed, and the brake disc 2 slides axially away from the second sprocket 7A and the first sprocket 1A. The first friction surface 22 separates from the second friction surface 41 and the brake is released. Thereafter, the second sprocket 7A, the ball 3 and the brake disc 2 are integrated, and the rotational motion is transmitted to the second sprocket 7A through the flat key arranged between the annular shaft ring 7A2 and the brake disc 2. The second sprocket 7A drives the escalator to run through the sprocket teeth.

[0080] Since the first sprocket 1A has specification restrictions during specific use, we also provide a fourth step 1A1 on the inner circumferential wall of the first sprocket 1A, and the fourth step 1A1 cooperates with the annular shaft ring 7A2 to form an annular groove, and the first connecting surface 24 is provided with an annular protrusion 241 that cooperates with the annular groove, and the tapered groove 21 is provided on the top surface of the annular protrusion 241. By providing the fourth step 1A1, we can also adjust the size of the first sprocket 1A and the second sprocket 7A, and this arrangement can also save space.

[0081] In addition, a first flat key groove 7A5 is provided on the inner circumferential wall of the annular shaft ring 7A2, a second flat key groove 242 is provided on the opposite surface of the first connecting surface 24 and the inner wall of the annular shaft ring 7A2, and a second flat key is provided in the space formed by the first flat key groove 7A5 and the second flat key groove 242. The flat key groove is provided on the inner wall of the annular shaft ring 7A2, which can increase the specification and strength of the flat key and make the kinetic energy transmission effect better. Wherein, the axial member 51 is a screw or a straight rod.

[0082] The present application also provides a braking method, comprising the following steps:

[0083] S1: The motor 6 drives the driving disc 1 to rotate, a torque difference is generated between the driving disc 1 and the brake disc 2, the ball 3 deviates from the original rotation axis, the ball 3 generates an axial thrust on the outer conical surface of the conical groove surface, the elastic member 52 is compressed under the pressure of the ball 3, the brake disc 2 slides axially away from the driving disc 1, the first friction surface 22 moves downward and separates from the second friction surface 41, and the brake is released;

[0084] S2: the motor 6 stops rotating, the torque difference between the driving disc 1 and the brake disc 2 disappears, the elastic force generated by the recovery deformation of the compressed spring pushes the ball 3 back to the original rotation axis, the axial thrust of the ball 3 on the conical groove surface disappears, and the brake disc 2 slides axially under the push of the elastic force and approaches the driving disc 1, and the first friction surface 22 is pressed against the second friction surface 41 to achieve braking.

[0085] The present application also provides an engineering motor, which includes the braking mechanism as described above.

[0086] The present application also provides an elevator, which includes the braking mechanism as described above, wherein the elevator is a traction-type vertical elevator, a forced-drive vertical elevator, or an escalator.

[0087] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

[0088] Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A braking mechanism, characterized in that: include: A driving disc, the driving disc is linked to the motor, and a plurality of circular grooves are provided on the opposite surfaces of the driving disc and the brake disc; The brake disc is coaxially arranged with the driving disc and can slide along the axial member; the brake disc is provided with a conical groove corresponding to the circular groove one by one, and the conical groove is arranged opposite to the circular groove to form a accommodating space with a variable distance; the outer circumferential wall of the brake disc is provided with a first friction surface; A ball, the ball being rotatably disposed in the accommodating space; A friction seat, the friction seat is fixedly connected to the mounting site, and an inner circumferential wall of the friction seat is provided with a second friction surface that contacts the first friction surface to achieve braking; An elastic limiting structure, wherein the elastic limiting structure comprises the axial member, the elastic member and the limiting member, wherein the axial member is axially arranged, one end of which is slidably connected to the brake disc, and the other end of which is connected to the power output mechanism, the limiting member is fixedly connected to the axial member, the elastic member is sleeved on the axial member, one end of which is limited by the brake disc, and the other end of which is limited by the limiting member, and when the elastic member is deformed or reset, the brake disc slides axially to make the first friction surface contact or separate from the second friction surface; The friction seat comprises a friction plate, a friction arm and a friction arm seat, wherein the friction plate is arranged in an arc shape matching with the first friction surface, the second friction surface is the inner side wall of the friction plate, the inner side wall of the friction arm is provided with an arc surface matching with the outer side wall of the friction plate, the friction plate and the arc surface are detachably connected, the side wall of the friction arm seat is provided with a mounting hole, the friction plate passes through the mounting hole and matches with the first friction surface, and the friction arm is fixedly connected with the friction seat; The limiting member comprises a first bottom plate and a first limiting edge, wherein the first limiting edge is arranged on a side where the first bottom plate abuts against the elastic member, and the limiting member is fixedly connected to the axial member via the first bottom plate.

2. The brake mechanism according to claim 1, characterized in that: The elastic member is a compression spring or a spring.

3. The brake mechanism according to claim 1, characterized in that: The circular grooves are evenly distributed on circles with equal radius.

4. The brake mechanism according to claim 1, characterized in that: A limiting groove is provided at the matching position between the brake disc and the elastic member, and the end of the elastic member extends into the limiting groove.

5. The brake mechanism according to claim 1, characterized in that: The limiting member also includes a safety seat, which has a second bottom plate and a second limiting edge. The second limiting edge is arranged on one side of the first bottom plate and is fixedly connected to the second bottom plate. The safety seat is fixedly connected to the axial member through the second bottom plate.

6. The brake mechanism according to claim 1, characterized in that: The driving disk comprises a first disk surface, a transmission shaft hole is provided at the center of the first disk surface, the driving disk is linked to the motor output shaft through the transmission shaft hole, and the circular groove is provided on the lower surface of the first disk surface.

7. The brake mechanism according to claim 6, characterized in that: The transmission shaft hole includes a first shaft hole and a second shaft hole which are coaxially arranged up and down, the inner diameter of the first shaft hole is smaller than the inner diameter of the second shaft hole, a first step is formed at the transition between the first shaft hole and the second shaft hole, the motor output shaft is provided with a second step, the motor output shaft cooperates with the first shaft hole, and the upper surface of the drive disk is blocked by the second step; the second shaft hole cooperates with the cover, and the upper surface of the cover is blocked by the first step, the cover is connected to the motor output shaft by a hexagon socket screw, and a first flat key is provided between the first shaft hole and the motor output shaft to realize the synchronous rotation of the drive disk and the motor output shaft.

8. The brake mechanism according to claim 1, characterized in that: The driving disk includes a second disk surface, a first rotating shaft hole is provided at the center position of the second disk surface, the driving disk is rotatably connected to the rotating shaft through the first rotating shaft hole, a sprocket is provided on the outer circumferential wall of the second disk surface, the driving disk is driven by the motor through the sprocket and the chain, and the circular groove is provided on the lower surface of the second disk surface.

9. The brake mechanism according to any one of claims 6 to 8, characterized in that: The power output mechanism is a reducer, the axial member is the input shaft of the reducer, the reducer is coaxially arranged with the motor, the brake disc is slidably connected to the reducer input shaft through a spline, the limit member is fixedly connected to the reducer input shaft, and the elastic member is sleeved between the brake disc and the limit member.

10. The brake mechanism according to claim 1, characterized in that: The driving disc is a first sprocket, and the power output mechanism is a second sprocket. The first sprocket is a ring-shaped sprocket, and a sprocket is arranged on the outer circumferential wall of the ring-shaped sprocket. A circular groove is arranged on the lower surface of the ring-shaped sprocket; the second sprocket has a third disc surface and sprockets, an annular shaft ring and an axial member arranged on the third disc surface, a third step is arranged on the outer circumferential wall of the annular shaft ring, and the upper end of the first sprocket is blocked and limited by the third step, a rotating shaft is arranged at the center position of the third disc surface, and the sprocket is arranged on the outer circumferential wall of the third disc surface, the axial member and the annular shaft ring are fixed on one side of the third disc surface and extend toward the brake disc, and the axial member is arranged on the inner side of the annular shaft ring; the brake disc is arranged from outside to inside according to A first friction surface, a first connecting surface and a second connecting surface are provided. The first friction surface is arranged on the outer circumferential wall of the brake disc, the second connecting surface is arranged on the inner side of the annular shaft ring and is parallel to the third disc surface, the second connecting surface is provided with a first through hole for the axial member to pass through, and a second through hole for the rotating shaft to pass through, the first connecting surface connects the first friction surface and the second connecting surface along the lower end of the first sprocket, the lower end of the annular shaft ring and the inner side wall of the annular shaft ring, the conical groove is arranged at the position corresponding to the first connecting surface and the circular groove, the conical groove and the circular groove form an accommodating space, the ball is arranged in the accommodating space, and the first connecting surface and the annular shaft ring are transmitted by a second flat key.

11. The brake mechanism according to claim 10, characterized in that: The inner circumferential wall of the first sprocket is provided with a fourth step, and the fourth step cooperates with the annular shaft ring to form an annular groove. The first connecting surface is provided with an annular protrusion that cooperates with the annular groove, the conical groove is arranged on the top surface of the annular protrusion, and the circular groove is arranged at a position corresponding to the conical groove.

12. The brake mechanism according to claim 11, characterized in that: A first flat key groove is provided on the inner circumferential wall of the annular shaft ring, a second flat key groove is provided on the opposite surface of the first connecting surface and the inner wall of the annular shaft ring, and a flat key is provided in the space formed by the first flat key groove and the second flat key groove.

13. The brake mechanism according to claim 10, characterized in that: The axial member is a screw rod or a straight rod.

14. A braking method, used for the braking mechanism according to any one of claims 1 to 13, characterized in that: The steps include: The motor drives the driving disc to rotate, a torque difference is generated between the driving disc and the brake disc, the ball deviates from the original rotation axis, the ball generates an axial thrust on the outer conical surface of the conical groove surface, the elastic member is compressed under the pressure of the ball, the brake disc slides axially away from the driving disc, the first friction surface moves downward and separates from the second friction surface, and the brake is released; When the motor stops rotating, the torque difference between the driving disc and the brake disc disappears, and the elastic force generated by the recovery deformation of the compressed spring pushes the ball back to the original rotation axis. The axial thrust of the ball on the conical groove surface disappears, and the brake disc slides axially under the push of the elastic force and approaches the driving disc. The first friction surface is pressed against the second friction surface to achieve braking.

15. An engineering motor, characterized in that: The engineering motor comprises a braking mechanism as described in any one of claims 1-13.

16. An elevator, characterized in that: The elevator comprises a braking mechanism according to any one of claims 1-13.

17. The elevator according to claim 16, characterized in that The elevator is a traction type vertical elevator, a forced drive type vertical elevator or an escalator.

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