Braking force self-adaptive adjusting device and method for elevator brake

Abstract

The invention discloses an elevator brake braking force self-adaptive adjusting device and method. The elevator brake braking force self-adaptive adjusting device comprises a brake body, a braking force adjusting module and a brake pad abrasion detection module. The brake body comprises an electromagnetic module, and brake arms are symmetrically arranged on the two sides of the electromagnetic module. The braking force adjusting modules are symmetrically arranged on the two sides of the electromagnetic module, and each braking force adjusting module comprises a driving mechanism and a braking spring adjusting mechanism; the brake pad wear detection modules are symmetrically arranged on the two sides of the electromagnetic module, and each brake pad wear detection module comprises a slide rheostat slip sheet and a slide rheostat resistance wire; the brake pad abrasion loss is measured through the sliding rheostat and the position variable quantity of the brake arm after the brake pad is abraded, the compression amount of the brake spring is adjusted through the worm and gear driving lead screw, then the brake force is adjusted, the integration degree is high, the structure is safe and reliable, the brake force is adjusted in a self-adaptive mode according to the brake pad abrasion loss, and the brake efficiency is improved. The brake braking effect is optimized, and the brake safety coefficient is improved.

Description

Technical Field

[0001] The invention relates to the field of elevator brakes, and in particular to an elevator brake force adaptive adjustment device and method. Background Art

[0002] As an important vertical transportation tool, elevators have been widely used in various occasions in life. In the field of elevator technology, brakes are an important part of the safe operation of elevators. When the elevator is running and the elevator is emergency braked, the elevator brake wheel and the brake pad rub against each other, causing the brake pad to wear or deform, resulting in a change in the friction area between the brake pad and the brake wheel. After installation and commissioning of common elevator brakes, the amount of brake spring compression does not change, so the brake pressure between the brake pad and the brake wheel does not change. However, as the friction area increases or decreases, the friction between the brake pad and the brake wheel changes, causing the braking deceleration to exceed the specified value, affecting passenger comfort, and even affecting the safety of elevator operation, causing the car or counterweight to hit the top or bottom of the pier and other safety accidents.

[0003] Therefore, a device and method for adaptively adjusting the braking force of an elevator brake is needed to adaptively adjust the braking force of the brake according to the wear of the brake pad. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] An elevator brake force adaptive adjustment device and method, comprising:

[0006] The brake body includes an electromagnetic module and a fixed frame; the electromagnetic module is fixedly installed on the fixed frame, the lower end of the electromagnetic module is symmetrically provided with two rotating arms, the two rotating arms are rotatably provided on the fixed frame, the two sides of the electromagnetic module are symmetrically provided with brake arms, the brake arms are provided with brake shoes, and the brake shoes are detachably connected to the brake pads; the top rod bolt is provided at the upper end of the brake arm, and the brake arm is rotatably connected to the fixed frame; the fixed frame is fixedly connected to the ground;

[0007] The braking force adjustment module includes two braking force adjustment mechanisms, which are symmetrically arranged on both sides of the electromagnetic module. The braking force adjustment mechanism includes a brake spring support rod, a brake spring adjustment mechanism, and a driving mechanism; one end of the brake spring support rod is rotatably connected to the fixed frame, and the other end of the brake spring support rod is slidably connected to the brake arm. The brake spring adjustment mechanism is coaxially arranged with the brake spring support rod, and the driving mechanism is arranged behind the brake spring adjustment mechanism;

[0008] A brake pad wear detection module is provided above the braking force adjustment module.

[0009] Preferably, the braking force adjustment module also includes two outer fixing plates, an upper reinforcement plate, and a rear reinforcement plate; the two outer fixing plates are symmetrically arranged on both sides of the brake spring adjustment mechanism, the two outer fixing plates are fixedly connected to the brake arm, the upper reinforcement plate is fixedly connected to the top of the outer fixing plates, and the rear reinforcement plate is fixedly connected to the rear of the outer fixing plates.

[0010] Preferably, the brake spring adjustment mechanism includes an adjusting screw, an adjusting screw nut, a spring adjustment plate, a brake spring and a screw nut guide assembly; one end of the adjusting screw is rotatably connected to the brake arm through a third bearing, the adjusting screw is spirally connected to the adjusting screw nut, the adjusting screw nut is fixed to the spring adjustment plate, the brake spring and the adjusting screw are coaxially arranged, the front end face and the rear end face of the brake spring are respectively in contact with the brake arm and the spring adjustment plate, and the screw nut guide assembly is fixed to the brake arm; the sliding groove is arranged in the axial direction of the adjusting screw and passes through the adjusting screw, and one end of the adjusting screw is movably accommodated in the sliding groove.

[0011] Preferably, the screw nut guide assembly includes a plurality of guide rods and an anti-rotation frame. The plurality of guide rods are distributed around the axis of the brake spring and fixed to the brake arm. The spring adjustment plate is slidably connected to the guide rods. The anti-rotation frame is fixed to the middle of the guide rods, and the anti-rotation frame is fixed to the external fixed plate.

[0012] Preferably, the driving mechanism includes a dual-axis motor, a dual-axis motor seat, a worm gear, a worm and a drive transmission assembly; the dual-axis motor is fixedly connected to the dual-axis motor seat, and the dual-axis motor fixing plate is fixedly connected to the dual-axis motor seat; the dual-axis motor fixing plate is fixedly connected to two external fixing plates; the worm gear is keyed to the adjusting screw, the worm gear is spirally connected to the worm, and the dual-axis motor and the worm are meshedly connected through the drive transmission assembly.

[0013] Preferably, the drive transmission assembly includes two first gears, two second gears, two first bearings, two second bearings, two first shoulders, and two second shoulders; the two first gears are symmetrically arranged on both sides of the dual-axis motor, each first gear is fixedly connected to an output end of the dual-axis motor, and the first shoulders and first bearings are symmetrically arranged on the output ends of both sides of the dual-axis motor, each first gear is arranged between the first shoulder and one side of the dual-axis motor, and the first shoulder is arranged between the first gear and the first bearing; second gears are symmetrically arranged on both sides of the worm, and the second gear is fixedly connected to the worm; each second gear is arranged between one side of the worm and the second shoulder; each second shoulder is arranged between the second gear and the second bearing; each first gear is meshed with a second gear, and the first bearing and the second bearing are installed in corresponding bearing holes arranged in the outer fixed plate.

[0014] Preferably, the brake pad wear detection module includes a sliding rheostat slider, a sliding rheostat resistance wire, and a sliding rheostat guide assembly. The sliding rheostat slider is fixedly connected above the brake arm, the sliding rheostat resistance wire and the sliding rheostat guide assembly are coaxially arranged, and the front end of the sliding rheostat slider is slidably connected to the sliding rheostat resistance wire.

[0015] Preferably, the sliding rheostat guide assembly includes a sliding rheostat guide plate, a sliding rheostat metal rod and a metal rod linear bearing; the sliding rheostat guide plate is fixedly connected to an external fixed plate, the metal rod linear bearing is fixedly connected inside the sliding rheostat guide plate, one end of the sliding rheostat metal rod is rotatably connected to a fixed frame, and the other end of the sliding rheostat metal rod is movably connected to the metal rod linear bearing.

[0016] Preferably, the electromagnetic module is an electromagnetic sticker device.

[0017] The present invention also provides a method for adaptively adjusting the braking force of an elevator brake, comprising the following steps:

[0018] S1. After installing the brake pad wear detection module, the wear amount is adjusted to zero when the brake arm is closed;

[0019] S2. When the elevator stops running, the brake pad wear detection module works to detect the resistance value of the sliding rheostat;

[0020] S3. Calculate the brake pad wear amount according to the resistance value of the sliding rheostat and the resistance-wear formula, wherein the resistance-wear formula is:

[0021]

[0022] Among them l 1 and θ is the brake size factor, R is the resistance value of the sliding rheostat, R 0 is the resistance value after the wear amount is adjusted to zero, ρ is the resistivity of the resistance wire of the sliding rheostat;

[0023] S4, the braking force adjustment module adjusts the position of the spring adjustment plate according to the brake pad wear amount W, thereby adjusting the brake spring expansion amount x;

[0024] S5. After adjusting the expansion and contraction amount x of the brake spring, the spring force of the brake spring acting on the brake arm is adjusted, thereby adjusting the braking force of the brake pad acting on the brake wheel.

[0025] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0026] The present invention provides an elevator brake braking force adaptive adjustment device and method. The driving mechanism is provided with a double-axis motor, and gears are symmetrically arranged at both ends of the double-axis motor, so that the transmission can be smoother and the influence of the torque generated by the unilateral drive on the transmission mechanism is reduced. At the same time, the driving mechanism adopts a worm gear to drive the adjusting screw to rotate. After the adjustment is completed, the worm gear can be self-locked to prevent the braking force caused by the movement of the brake spring, so that the structure is safe and reliable. The brake spring adjustment mechanism adopts a ball screw to change the compression of the brake spring, so that the adjustment accuracy of the brake spring compression is higher. The guide rod is arranged around the axis of the adjusting screw and the adjusting screw nut, and an anti-rotation frame is arranged in the middle to reduce the torsion error caused by the spiral transmission of the adjusting screw and the adjusting screw nut. The brake pad wear detection module calculates the brake pad wear by using the change in resistance value of the sliding rheostat and the size of the brake arm. The brake pad wear detection module is arranged above the brake arm to reduce the influence of the detection module on the working process of the brake. At the same time, the relationship between the position size change of the sliding rheostat and the brake pad after wear is used, and the brake pad wear is mapped on the sliding rheostat for year-on-year amplification, so that the detection is more accurate, so that the braking force adjustment is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall structure diagram of the present invention;

[0028] Figure 2 This is a structural diagram of the braking force adjustment module of the present invention;

[0029] Figure 3 This is a cross-sectional view of the braking force adjustment module of the present invention;

[0030] Figure 4 This is a structural diagram of the drive assembly of the present invention;

[0031] Figure 5 This is a structural diagram of the brake spring adjustment assembly of the present invention;

[0032] Figure 6 This is a structural diagram of the brake pad wear detection module of the present invention;

[0033] Figure 7 It is a schematic diagram of the brake pad wear detection method of the present invention;

[0034] Figure 8 It is a schematic diagram of the brake pad wear detection method of the present invention;

[0035] Fig. 9 This is a flow chart of the braking force adaptive adjustment of the present invention;

[0036] Fig.10 It is a schematic structural diagram of the rotating arm of the present invention.

[0037] Among them, 101, fixed frame; 1, outer fixing plate; 2, dual-axis motor; 3, upper reinforcing plate; 4, sliding rheostat guide plate; 5, sliding rheostat metal rod; 6, sliding rheostat slider; 7, sliding rheostat resistance wire; 8, electromagnetic module; 9, rotating arm; 10, push rod nut; 11, push rod bolt; 12, dual-axis motor fixing plate; 13, rear reinforcing plate; 14, brake spring support rod rear nut; 15, brake spring support rod; 16, brake arm; 17, brake shoe; 18, brake arm rotating shaft; 19, brake pad; 20, brake wheel; 21 , double-axis motor base; 22, first gear; 23, second gear; 24, worm wheel; 25, worm; 26, metal rod linear bearing; 27, third bearing; 28, adjusting screw; 29, anti-rotation frame; 30, guide rod; 31, brake spring; 32, spring adjustment plate; 33, adjusting screw nut; 34, double-row tapered roller bearing; 35, first bearing; 36, first shoulder; 37, second bearing; 38, second shoulder; 39, worm gear sleeve; 281, sliding groove; 91, hinge hole; 92, first rotating part; 93, second rotating part. DETAILED DESCRIPTION

[0038] The following embodiments may help those skilled in the art to more fully understand the present invention, but shall not limit the present invention in any way.

[0039] Reference Figure 1-10 The present invention provides an elevator brake force adaptive adjustment device, comprising:

[0040] The brake body includes an electromagnetic module 8 and a fixed frame 101; the electromagnetic module 8 is fixedly installed on the fixed frame 101, and two rotating arms 9 are symmetrically arranged at the lower end of the electromagnetic module 8, and the two rotating arms 9 are rotatably arranged on the fixed frame 101. Braking arms 16 are symmetrically arranged on both sides of the electromagnetic module 8, and brake shoes 17 are arranged on the brake arms 16, and the brake shoes 17 are detachably connected to the brake pads 19; the top rod bolt 11 is arranged at the upper end of the brake arm 16, and the brake arm 16 is rotatably connected to the fixed frame 101; the fixed frame 101 is fixedly connected to the ground;

[0041] The braking force adjustment module includes two braking force adjustment mechanisms, which are symmetrically arranged on both sides of the electromagnetic module 8. The braking force adjustment mechanism includes a brake spring support rod 15, a brake spring adjustment mechanism, and a driving mechanism; one end of the brake spring support rod 15 is rotatably connected to the fixed frame 101, and the other end of the brake spring support rod 15 is slidably connected to the brake arm 16. The brake spring adjustment mechanism is coaxially arranged with the brake spring support rod 15, and the driving mechanism is arranged behind the brake spring adjustment mechanism;

[0042] A brake pad wear detection module is provided above the braking force adjustment module.

[0043] In one embodiment of the present invention, the two rotating arms 9 are rotatably disposed on the fixed frame 101 through the brake arm rotating shaft 18 , and the rotating arms 9 can rotate around the axis of the brake arm rotating shaft 18 .

[0044] In one embodiment of the present invention, the braking force adjustment module also includes two outer fixing plates 1, an upper reinforcing plate 3, and a rear reinforcing plate 13; the two outer fixing plates 1 are symmetrically arranged on both sides of the brake spring adjustment mechanism, the two outer fixing plates 1 are fixedly connected to the brake arm 16, the upper reinforcing plate 3 is fixedly connected to the top of the outer fixing plate 1, and the rear reinforcing plate 13 is fixedly connected to the rear of the outer fixing plate 1.

[0045] In one embodiment of the present invention, the brake spring adjustment mechanism includes an adjusting screw 28, an adjusting screw nut 33, a spring adjustment plate 32, a brake spring 31 and a screw nut guide assembly; one end of the adjusting screw 28 is rotatably connected to the brake arm 16 through a third bearing 27, the adjusting screw 28 is spirally connected to the adjusting screw nut 33, the adjusting screw nut 33 is fixed to the spring adjustment plate 32, the brake spring 31 is coaxially arranged with the adjusting screw 28, the front end face and the rear end face of the brake spring 31 are in contact with the brake arm 16 and the spring adjustment plate 32 respectively, and the screw nut guide assembly is fixed to the brake arm 16; the sliding groove 281 is arranged in the axial direction of the adjusting screw 28 and passes through the adjusting screw 28, and one end of the adjusting screw 28 is movably accommodated in the sliding groove 281.

[0046] In one embodiment of the present invention, the brake spring 31 is sleeved on the outside of the adjusting screw rod 28 .

[0047] In one embodiment of the present invention, the screw nut guide assembly includes a plurality of guide rods 30 and an anti-rotation frame 29. The plurality of guide rods 30 are distributed around the axis of the brake spring 31 and fixedly connected to the brake arm 16. The spring adjustment plate 32 is slidably connected to the guide rod 30. The anti-rotation frame 29 is fixedly connected to the middle part of the guide rod 30. The anti-rotation frame 29 is fixedly connected to the external fixed plate 1.

[0048] In one embodiment of the present invention, the driving mechanism includes a dual-axis motor 2, a dual-axis motor seat 21, a worm gear 24, a worm 25 and a drive transmission assembly; the dual-axis motor 2 is fixedly connected to the dual-axis motor seat, and the dual-axis motor fixing plate 12 is fixedly connected to the dual-axis motor seat 21; the dual-axis motor fixing plate 12 is fixedly connected to the two outer fixing plates; the worm gear 24 is keyed to the adjusting screw 28, the worm gear 24 is spirally connected to the worm 25, and the dual-axis motor 2 is meshedly connected to the worm 25 through the drive transmission assembly.

[0049] In one embodiment of the present invention, the drive transmission assembly includes two first gears 22, two second gears 23, two first bearings 35, two second bearings 37, two first shoulders 36, and two second shoulders 38; the two first gears 22 are symmetrically arranged on both sides of the dual-axis motor 2, each first gear 22 is fixedly connected to an output end of the dual-axis motor 2, and the first shoulders 36 and the first bearings 35 are symmetrically arranged on the output ends of both sides of the dual-axis motor 2, each first gear 22 is arranged between the first shoulder 36 and one side of the dual-axis motor 2, and the first shoulder 36 is arranged between the first gear 22 and the first bearing 35; the second gears 23 are symmetrically arranged on both sides of the worm 25, and the second gear 23 is fixedly connected to the worm 25; each second gear 23 is arranged between one side of the worm 25 and the second shoulder 38; each second shoulder 38 is arranged between the second gear 23 and the second bearing 37; each first gear 22 is meshed and connected with a second gear 23, and the first bearing 35 and the second bearing 37 are installed in corresponding bearing holes arranged in the outer fixing plate 1.

[0050] Further, the inner ring of the first bearing 35 is fixedly connected to the output end of the dual-axis motor 2, and the outer ring of the first bearing 35 is fixedly connected to the corresponding bearing hole; the inner ring of the second bearing 37 is fixedly connected to one end of the worm 25, and the outer ring of the second bearing 37 is fixedly connected to the corresponding bearing hole;

[0051] In one embodiment of the present invention, the brake pad wear detection module includes a sliding rheostat slider 6, a sliding rheostat resistance wire 7, and a sliding rheostat guide assembly, wherein the sliding rheostat slider 6 is fixedly connected to the top of the brake arm 16, the sliding rheostat resistance wire 7 is coaxially arranged with the sliding rheostat guide assembly, and the front end of the sliding rheostat slider 6 is slidingly connected with the sliding rheostat resistance wire 7. The displacement between the sliding rheostat slider 6 and the sliding rheostat resistance wire 7 can be obtained by the change in resistance between the front end of the sliding rheostat slider 6 and the sliding rheostat resistance wire 7.

[0052] In one embodiment of the present invention, the sliding rheostat guide assembly includes a sliding rheostat guide plate 4, a sliding rheostat metal rod 5 and a metal rod linear bearing 26; the sliding rheostat guide plate 4 is fixedly connected to the external fixed plate 1, the metal rod linear bearing 26 is fixedly connected to the sliding rheostat guide plate 4, one end of the sliding rheostat metal rod 5 is rotatably connected to the fixed frame 101, and the other end of the sliding rheostat metal rod 5 is movably connected to the metal rod linear bearing 26.

[0053] In one embodiment of the present invention, the sliding rheostat metal rod 5 , the rotating arm 9 , the brake spring support rod 15 and the brake arm 16 are all hinged to the fixed frame 101 .

[0054] In one embodiment of the present invention, the sliding resistor metal rod 5, the rotating arm 9, the brake spring support rod 15 and the brake arm 16 are all provided with hinge holes for hinge connection.

[0055] In one embodiment of the present invention, the worm wheel 24 and the adjusting screw rod 28 are connected by a flat key.

[0056] See also Fig.10 In one embodiment of the present invention, a hinge hole 91, a first rotating part 92 and a second rotating part 93 are provided on the rotating arm 9; the two second rotating parts 93 are symmetrically arranged below the output end of the electromagnetic module 8, and the second rotating part 93 is driven to rotate around the hinge hole 91 through the telescopic output end of the electromagnetic module 8, thereby driving the first rotating part 92 to rotate; the rotation of the first rotating part 92 drives the upper end of the brake arm 16 to rotate around the hinge point of the brake arm 16, so that the brake arm 16 brakes the brake wheel 20.

[0057] In one embodiment of the present invention, the cross section of the rotating arm 9 is L-shaped, and the hinge hole 91 is arranged at a right angle of the rotating arm 9. The rotating arm 9 is hinged to the fixed frame 101 through the hinge hole.

[0058] In one embodiment of the present invention, one end of the adjusting screw 28 is rotatably connected to the inner wall of the outer fixed plate 1 through a double-row tapered roller bearing 34. The double-row tapered roller bearing 34 is used to support the screw 28 so that the supporting screw 28 and the brake spring support rod 15 remain coaxial; a worm gear stop sleeve 39 is provided on the adjusting screw 28, and the worm gear stop sleeve 39 is used to prevent axial displacement between the worm wheel 24 and the adjusting screw 28.

[0059] In one embodiment of the present invention, the push rod bolt 11 is threadedly connected to the brake arm 16 through the push rod nut 10 .

[0060] In one embodiment of the present invention, the brake spring support rod rear nut 14 is threadedly connected to the brake spring support rod, and the brake spring support rod rear nut 14 is arranged on one side of the double row tapered roller bearing 34. The brake spring support rod rear nut 14 is used to prevent the double row tapered roller bearing 34 from axial movement.

[0061] The present invention also provides a method for adaptively adjusting the braking force of an elevator brake, comprising the following steps:

[0062] S1. After installing the brake pad wear detection module, when the brake arm 16 is closed, the wear amount is adjusted to zero;

[0063] S2. When the elevator stops running, the brake pad wear detection module works to detect the resistance value of the sliding rheostat;

[0064] S3. Calculate the wear amount of the brake pad 19 according to the resistance value of the sliding rheostat and the resistance-wear formula, wherein the resistance-wear formula is:

[0065]

[0066] Among them l 1 and θ is the brake size factor, R is the resistance value of the sliding rheostat, R 0 is the resistance value after the wear amount is adjusted to zero, and ρ is the resistivity of the resistance wire 7 of the sliding rheostat;

[0067] S4, the braking force adjustment module adjusts the position of the spring adjustment plate 32 according to the wear amount W of the brake pad 19, thereby adjusting the expansion and contraction amount x of the brake spring 31;

[0068] S5. After adjusting the extension and contraction amount x of the brake spring 31, the spring force of the brake spring 31 acting on the brake arm 16 is adjusted, so that the braking force of the brake pad 19 acting on the brake wheel 20 is adjusted.

[0069] In one embodiment of the present invention, X=f(W).

[0070] In one embodiment of the present invention, the value of X is determined according to W, and there is a quantitative relationship between X and W.

[0071] Directions:

[0072] After the elevator brake force adaptive adjustment device is installed, the brake arm 16 is closed, the brake pad 19 is fitted with the brake wheel 20, the brake pad wear detection module is zeroed, the resistance value of the sliding rheostat is recorded, the brake arm 16 is opened, and the elevator runs. When the elevator car is about to arrive at the station, the brake arm 16 is closed, the brake pad 19 and the brake wheel 20 rub against each other, and the elevator car stops running. The relative position of the sliding rheostat slider 6 and the sliding rheostat resistance wire 7 changes from the initial state, the resistance value changes, the wear amount of the brake pad 19 is calculated, and the dual-axis motor 2 works to drive the first gear 22 to rotate The first gear 22 and the second gear 23 are meshed for transmission, so that the second gear 23 and the worm 25 rotate, the worm 25 is spirally connected with the worm wheel 24, the worm wheel 24 rotates, the worm wheel 24 is keyed with the adjusting screw 28, the adjusting screw 28 rotates, the adjusting screw nut 33 is fixed to the spring adjustment plate 32, and under the action of the guide rod 30, it is relatively displaced with the adjusting screw 28, thereby changing the compression amount of the brake spring 31, and then changing the braking force. When the brake spring 31 reaches the appropriate compression amount, the dual-axis motor 2 stops working, the braking force adjustment is completed, and the use process is completed this time.

[0073] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0074] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An elevator brake force adaptive adjustment device, characterized in that: include: A brake body, the brake body comprising an electromagnetic module (8) and a fixed frame (101); the electromagnetic module (8) is fixedly mounted on the fixed frame (101); two rotating arms (9) are symmetrically arranged at the lower end of the electromagnetic module (8); the two rotating arms (9) are rotatably arranged on the fixed frame (101); brake arms (16) are symmetrically arranged on both sides of the electromagnetic module (8); brake shoes (17) are arranged on the brake arms (16); the brake shoes (17) are detachably connected to the brake pads (19); a push rod bolt (11) is arranged at the upper end of the brake arm (16); the brake arm (16) is rotatably connected to the fixed frame (101); the fixed frame (101) is fixedly connected to the ground; A braking force adjustment module, the braking force adjustment module comprising two braking force adjustment mechanisms, the two braking force adjustment mechanisms being symmetrically arranged on both sides of the electromagnetic module (8), the braking force adjustment mechanism comprising a brake spring support rod (15), a brake spring (31) adjustment mechanism, and a drive mechanism; one end of the brake spring support rod (15) is rotatably connected to a fixed frame (101), the other end of the brake spring support rod (15) is slidably connected to a brake arm (16), the brake spring (31) adjustment mechanism is coaxially arranged with the brake spring support rod (15), and the drive mechanism is arranged behind the brake spring (31) adjustment mechanism; A brake pad (19) wear detection module, wherein the brake pad (19) wear detection module is arranged above the braking force adjustment module.

2. The elevator brake force adaptive adjustment device according to claim 1, characterized in that: The braking force adjustment module further comprises two outer fixing plates (1), an upper reinforcing plate (3), and a rear reinforcing plate (13); the two outer fixing plates (1) are symmetrically arranged on both sides of the brake spring (31) adjustment mechanism, the two outer fixing plates (1) are fixedly connected to the brake arm (16), the upper reinforcing plate (3) is fixedly connected to the top of the outer fixing plates (1), and the rear reinforcing plate (13) is fixedly connected to the rear of the outer fixing plates (1).

3. The elevator brake force adaptive adjustment device according to claim 1, characterized in that: The brake spring (31) adjustment mechanism comprises an adjusting screw (28), an adjusting screw nut (33), a spring adjustment plate (32), a brake spring (31) and a screw nut guide assembly; one end of the adjusting screw (28) is rotatably connected to the brake arm (16) through a third bearing (27), the adjusting screw (28) is spirally connected to the adjusting screw nut (33), the adjusting screw nut (33) is fixedly connected to the spring adjustment plate (32), the brake spring (31) is coaxially arranged with the adjusting screw (28), the front end face and the rear end face of the brake spring (31) are respectively in contact with the brake arm (16) and the spring adjustment plate (32), and the screw nut guide assembly is fixedly connected to the brake arm (16); the sliding groove (281) is arranged in the axial direction of the adjusting screw (28) and passes through the adjusting screw (28), and one end of the adjusting screw (28) is movably accommodated in the sliding groove (281).

4. The elevator brake force adaptive adjustment device according to claim 3, characterized in that: The screw nut guide assembly comprises a plurality of guide rods (30) and an anti-rotation frame (29). The plurality of guide rods (30) are distributed around the axis of the brake spring (31) and are fixedly connected to the brake arm (16). The spring adjustment plate (32) is slidably connected to the guide rods (30). The anti-rotation frame (29) is fixedly connected to the middle of the guide rods (30). The anti-rotation frame (29) is fixedly connected to the outer fixing plate (1).

5. The elevator brake force adaptive adjustment device according to claim 1, characterized in that: The driving mechanism comprises a dual-axis motor (2), a dual-axis motor seat (21), a worm wheel (24), a worm (25) and a driving transmission component; the dual-axis motor (2) is fixedly connected to the dual-axis motor seat (21), the dual-axis motor fixing plate (12) is fixedly connected to the dual-axis motor seat (21); the dual-axis motor fixing plate (12) is fixedly connected to the two outer fixing plates (1); the worm wheel (24) is key-connected to the adjusting screw (28), the worm wheel (24) is spirally connected to the worm (25), and the dual-axis motor (2) and the worm (25) are meshingly connected via the driving transmission component.

6. The elevator brake force adaptive adjustment device according to claim 5, characterized in that: The drive transmission assembly comprises two first gears (22), two second gears (23), two first bearings (35), two second bearings (37), two first shaft shoulders (36), and two second shaft shoulders (38); the two first gears (22) are symmetrically arranged on both sides of the dual-axis motor (2); each first gear (22) is fixedly connected to an output end of the dual-axis motor (2); the first shaft shoulders (36) and the first bearings (35) are symmetrically arranged on the output ends of both sides of the dual-axis motor (2); each first gear (22) is arranged between the first shaft shoulder (36) and one side of the dual-axis motor (2); the first shaft shoulders (36) and the second bearings (35) are symmetrically arranged on the output ends of both sides of the dual-axis motor (2); 6) is arranged between the first gear (22) and the first bearing (35); the second gears (23) are symmetrically arranged on both sides of the worm (25), and the second gears (23) are fixedly connected to the worm (25); each second gear (23) is arranged between one side of the worm (25) and the second shaft shoulder (38); each second shaft shoulder (38) is arranged between the second gear (23) and the second bearing (37); each first gear (22) is meshedly connected with a second gear (23), and the first bearing (35) and the second bearing (37) are installed in corresponding bearing holes arranged in the outer fixing plate (1).

7. The elevator brake force adaptive adjustment device according to claim 1, characterized in that: The brake pad (19) wear detection module comprises a sliding rheostat slider (6), a sliding rheostat resistance wire (7), and a sliding rheostat guide assembly. The sliding rheostat slider (6) is fixedly connected to the top of the brake arm (16). The sliding rheostat resistance wire (7) and the sliding rheostat guide assembly are coaxially arranged. The front end of the sliding rheostat slider (6) is slidingly connected to the sliding rheostat resistance wire (7).

8. The elevator brake force adaptive adjustment device according to claim 7, characterized in that: The sliding rheostat guide assembly comprises a sliding rheostat guide plate (4), a sliding rheostat metal rod (5) and a metal rod linear bearing (26); the sliding rheostat guide plate (4) is fixedly connected to an external fixed plate (1), the metal rod linear bearing (26) is fixedly connected inside the sliding rheostat guide plate (4), one end of the sliding rheostat metal rod (5) is rotatably connected to a fixed frame (101), and the other end of the sliding rheostat metal rod (5) is movably connected to the metal rod linear bearing (26).

9. An elevator brake force adaptive adjustment method, based on the elevator brake force adaptive adjustment device according to any one of claims 1 to 8, characterized in that: The detection method comprises the following steps: S1, after installing the brake pad (19) wear detection module, when the brake arm (16) is closed, the wear amount is adjusted to zero; S2, when the elevator stops running, the brake pad (19) wear detection module works to detect the resistance value of the sliding rheostat; S3. Calculating the wear amount of the brake pad (19) according to the resistance value of the sliding rheostat and the resistance-wear formula, wherein the resistance-wear formula is: Where l1 and θ are brake size factors, R is the resistance value of the sliding rheostat, R0 is the resistance value after the wear amount is adjusted to zero, and ρ is the resistivity of the sliding rheostat resistance wire (7); S4, the braking force adjustment module adjusts the position of the spring adjustment plate (32) according to the wear amount W of the brake pad (19), thereby adjusting the expansion and contraction amount x of the brake spring (31); S5. After adjusting the extension and contraction amount x of the brake spring (31), the spring force of the brake spring (31) acting on the brake arm (16) is adjusted, thereby adjusting the braking force of the brake pad (19) acting on the brake wheel (20).

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