Elevator hoisting machine with automatic brake wear compensation function

Abstract

The application relates to an elevator traction machine with a brake wear automatic compensation function, which comprises a motor, a traction wheel and a brake unit, the brake unit comprises a brake wheel and a band brake assembly, the brake arm of the band brake assembly drives brake shoes to band brake the brake wheel, the brake arm is provided with a compensation assembly, the compensation assembly comprises a pushing part, the pushing part is connected with the brake arm through a transmission part, when the brake arm rotates away from the brake wheel, the pushing part is driven by the transmission part to push towards the side where the brake wheel is located, and the brake shoes are pushed to feed compensation in the direction close to the brake wheel. When the brake shoes are worn during braking, the brake shoes are separated from the brake wheel, at this time, the brake shoes are driven by the compensation assembly to feed compensation clearance in the direction close to the brake shoes, the automatic compensation function is realized, and the situation that the brake wheel and the brake shoes are separated, the brake band brake stroke is lengthened and parking delay occurs due to the gradual wear of the brake shoes is avoided.

Description

Technical Field

[0001] This invention relates to an elevator traction machine with automatic brake wear compensation function. Background Technology

[0002] The elevator traction machine is the power unit of the elevator, also known as the elevator main unit. Its function is to deliver and transmit power to make the elevator run. The elevator traction machine consists of a motor, brake, coupling, gearbox, traction sheave, frame, guide wheels, and auxiliary handwheel. The guide wheels are generally mounted on the frame or the load-bearing beam under the frame. The handwheel is sometimes fixed to the motor shaft, and sometimes it is usually hung on a nearby wall and then put on the motor shaft when in use.

[0003] The traction machine brake is a crucial safety device in elevator traction machines, used to control elevator operation and prevent accidental slippage. The traction machine brake mainly consists of a brake wheel, brake shoes, brake arm, brake spring, and magnetic push rod. The brake spring drives the brake arm to rotate, causing the brake arm to engage the brake shoes, which then apply the brakes through friction with the brake wheel. However, in existing brakes, wear occurs during the friction between the brake shoes and the brake wheel, resulting in a thinner friction layer on the brake shoes. This increases the gap between the brake shoes and the brake wheel, leading to a longer braking stroke and a longer braking time, resulting in delayed stopping. Summary of the Invention

[0004] The present invention addresses the problems existing in the prior art, namely, the technical problem to be solved by the present invention is to provide an elevator traction machine with automatic brake wear compensation function.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an elevator traction machine with automatic brake wear compensation function, comprising a motor, a traction sheave, and a braking unit, wherein the traction sheave is mounted on the output shaft of the motor; the braking unit comprises a brake wheel and a brake assembly, wherein the brake wheel is coaxially and fixedly connected to the traction sheave, and brake shoes are provided on both the left and right sides of the brake wheel; the brake assembly comprises brake arms symmetrically arranged on the left and right sides of the brake wheel and rotatable, the brake arms being used to drive the brake shoes to perform brake braking on the brake wheel; each brake arm is provided with a compensation component for driving the brake shoes to move toward the brake wheel for wear compensation, the compensation component comprising a pushing component, the pushing component being connected to the brake arm through a transmission component, wherein when the brake arm rotates toward the side away from the brake wheel, the transmission component drives the pushing component to push toward the side where the brake wheel is located, thereby pushing the brake shoes toward the brake wheel for compensation.

[0006] Furthermore, the compensation assembly also includes a housing fixedly mounted on the brake arm, the pushing component being disposed inside the housing, and the pushing end of the pushing component being driven downward by a transmission component; an mounting component is slidably connected in the horizontal direction inside the housing near the brake wheel, the mounting component abutting against the pushing end of the pushing component, and the brake shoe being detachably mounted on the side of the mounting component facing the brake wheel; when the pushing end of the pushing component moves downward, it pushes the mounting component and the brake shoe to move horizontally toward the brake wheel.

[0007] Furthermore, the pushing component includes a lead screw that is vertically arranged and rotatably mounted on the housing. The lead screw is driven to rotate by a transmission component, and a lifting slider is threaded onto the lead screw. The lifting slider moves downward under the drive of the lead screw to push the mounting component.

[0008] Furthermore, the motor is mounted on a base, and the lower end of the brake arm is hinged to the top of the base; the transmission components include a worm gear, a ratchet mechanism, a worm, a drive gear, and an arc-shaped rack. The lower end of the lead screw rotates through the lower part of the housing and then rotates to connect to the worm gear. The lead screw and the worm gear are connected by a ratchet mechanism for unidirectional transmission. The worm is connected to the worm gear for transmission, and the rear end of the worm is coaxially fixedly connected to the drive gear. The arc-shaped rack is located below the drive gear with its arc facing the side where the brake wheel is located. The arc-shaped rack is mounted on the base and meshes with the drive gear.

[0009] Furthermore, guide blocks are fixedly connected to both the front and rear sides of the lifting slider; the mounting component includes a vertically mounted plate that is detachably connected to the brake shoe, and a pair of guide plates are fixed to the side of the mounting plate away from the brake shoe. The pair of guide plates are distributed on the front and rear sides of the lifting slider, and each guide plate has an inclined groove. The inclined groove is inclined with the end closer to the brake wheel being higher and the end away from the brake wheel being lower. The guide block is slidably connected to the inclined groove. A pair of upper and lower guide rods are provided on both the front and rear sides of the mounting plate, and a pair of upper and lower horizontal grooves are provided on both the front and rear sidewalls of the housing. The guide rods are slidably engaged with the horizontal grooves.

[0010] Furthermore, the brake assembly also includes a mounting base fixedly installed on the top of the motor. Horizontally arranged brake rods are installed at both the left and right ends of the mounting base. The upper end of the brake arm is provided with a through hole for the brake rod located on the same side to pass through. A brake spring is provided between the end of the brake rod away from the mounting base and the brake arm. A magnetic telescopic rod for driving the upper ends of the left and right brake arms away from each other is fixedly installed on the top of the mounting base.

[0011] Furthermore, it also includes auxiliary components, which include a brake gear coaxially fixedly mounted on the front side of the brake wheel. Brake racks are symmetrically arranged on the left and right sides of the upper end of the brake gear. The mounting base is provided with a linkage component for driving the brake racks to engage or disengage with the brake gear.

[0012] Furthermore, the linkage component includes a rocker arm hinged to the left and right ends of the mounting base. The rocker arm is vertically arranged and its lower end is fixedly connected to a brake rack located on the same side. A connecting rod is hinged to the front side of the brake arm, and the end of the connecting rod away from the brake arm is hinged to the corresponding rocker arm.

[0013] Furthermore, the top left and right ends of the base are provided with adjustment components for supporting the arc-shaped rack. The adjustment components include a support frame slidably installed on the top of the base, the arc-shaped rack is fixedly installed on the top of the support frame, a T-shaped slide rail is fixedly installed on the top of the base, and a T-shaped slide groove is opened at the bottom of the support frame. The T-shaped slide groove and the T-shaped slide rail are slidably connected back and forth. The support frame is also threaded with a fixing bolt. When the fixing bolt is tightened downwards, the support frame is fixed together with the base.

[0014] Furthermore, a handle is fixedly installed at the top of the lead screw, extending through to the top of the housing.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention is reasonably designed. By setting up a supplementary component, when the brake shoe wears during the braking process, the brake shoe separates from the brake wheel. At this time, the compensation component drives the brake shoe to feed the compensation gap closer to the brake shoe, which plays an automatic compensation role and avoids the situation that the gap between the brake wheel and the brake shoe increases, the brake stroke increases, and the stopping delay occurs due to the gradual wear of the brake shoe. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the braking unit in this invention; Figure 3 This is a three-dimensional structural schematic diagram of the brake assembly in this invention; Figure 4 This is a three-dimensional structural diagram of the connection between the brake shoe and the compensation component in this invention; Figure 5 This is a schematic cross-sectional view of the connection between the brake shoe and the compensation component in this invention; Figure 6 This is a three-dimensional structural diagram of the mounting component in this invention; Figure 7 This is a three-dimensional structural diagram of the transmission component in this invention; Figure 8 This is a top cross-sectional view of the worm gear, ratchet mechanism, and lead screw connection in this invention; Figure 9 This is a three-dimensional structural schematic diagram of the adjustment component in this invention; Figure 10 This is a top view schematic diagram of the worm gear driving the lead screw to rotate in the transmission component of the present invention; Figure 11 This is a top view of the transmission component of the present invention when the worm gear rotates alone.

[0017] In the picture: 1-Motor; 101-Output shaft; 11-Base; 2-Traction sheave; 3-Brake unit; 31-Brake wheel; 32-Brake shoe; 33-Brake assembly; 331-Brake arm; 332-Mounting seat; 333-Brake lever; 334-Brake spring; 335-Magnetic telescopic rod; 34-Compensation assembly; 341-Housing; 342-Lead screw; 343-Lifting slider; 344-Mounting component; 3441-Mounting plate; 3442-Guide plate; 3444-Guide rod; 3445-Horizontal slide groove 345- Inclined slide rail; 346- Guide block; 347- Transmission component; 3471- Worm gear; 3472- Ratchet mechanism; 3473- Worm; 3474- Drive gear; 3475- Arc rack; 348- Handle; 35- Auxiliary component; 351- Brake gear; 352- Brake rack; 353- Linkage component; 3531- Rocker arm; 3532- Connecting rod; 36- Adjustment component; 361- Support frame; 362- T-shaped slide rail; 363- T-shaped slide rail; 364- Fixing bolt. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] like Figures 1-9As shown, the present invention discloses an elevator traction machine with automatic brake wear compensation function, comprising a motor 1, a traction sheave 2, and a braking unit 3. The motor 1 is mounted on a horizontally arranged base 11; the traction sheave 2 is mounted on the output shaft 101 of the motor 1; the braking unit 3 includes a brake wheel 31 and a brake assembly 33. The brake wheel 31 is coaxially and fixedly connected to the traction sheave 2, and brake shoes 32 are provided on both the left and right sides of the brake wheel 31; the brake assembly 33 is used to drive the brake shoes 32 to brake the brake wheel 31. The brake assembly 33 specifically includes brake arms 331 symmetrically arranged on the left and right sides of the brake wheel 31. The lower end of the brake arm 331 is hinged to the top of the base 11, and the brake arm 331 can rotate around the hinge towards the side where the brake wheel 31 is located or towards the side away from the brake wheel 31; when the left and right brake arms 331 rotate towards the brake wheel 31, they are used to drive the brake shoes 32 to brake the brake wheel 31. Furthermore, each brake arm 331 is provided with a compensation component 34 for driving the brake pads 32 located on the same side to move horizontally toward the brake wheel 31 for wear compensation. The compensation component 34 includes a pushing component, which is connected to the brake arm 331 through a transmission component. When the brake arm 331 rotates, the transmission component drives the pushing component to perform a pushing action. Specifically, when the brake arm 331 rotates toward the side away from the brake wheel 31, the transmission component drives the pushing component to push toward the side where the brake wheel 31 is located, so as to push the brake pads 32 to feed towards the brake wheel 31 for compensation, thereby realizing the compensation function.

[0021] In this embodiment, as Figure 2 and Figure 3 As shown, the brake assembly 33 also includes a mounting base 332 fixedly installed on the top of the motor 1. Horizontally arranged brake rods 333 are mounted on both the left and right ends of the mounting base 332. The brake rods 333 extend horizontally to the left and right sides respectively. Each brake arm 331 has a through hole at its upper end for the brake rod 333 located on the same side to pass through in the left-right direction. A brake spring 334 is provided between the end of each brake rod 333 furthest from the mounting base 332 and the brake arm 331. The brake spring 334 is sleeved on the brake rod 333. On the outer periphery, a magnetic telescopic rod 335 is fixedly installed on the top of the mounting base 332. The magnetic telescopic rod 335 has two telescopic ends, left and right. The two telescopic ends of the magnetic telescopic rod 335 are respectively connected to the upper ends of the left and right brake arms 331. When the magnetic telescopic rod 335 is energized, the telescopic ends extend outward, thereby driving the left and right brake arms 331 to rotate toward the side away from the brake wheel 31, so that the upper ends of the left and right brake arms 331 move away from each other.

[0022] In practical use, when the traction sheave 2 needs to be driven to rotate, the magnetic telescopic rod 335 is energized and extends outward. The magnetic telescopic rod 335 pushes the left and right brake arms 331 to rotate away from the brake wheel 31, thus moving them apart. The left and right brake arms 331 rotate around their corresponding hinge points. At this time, the brake spring 334 is compressed and contracts. The brake arms 331 drive the brake shoes 32 on both sides away from the brake wheel 31, releasing the brake on the brake wheel 31. Then, the motor 1 drives the traction sheave 2 to rotate, performing traction work. When braking is required, the magnetic telescopic rod 335 is de-energized and retracts inward. The rebound force of the brake spring 334 pushes the left and right brake arms 331 to rotate towards the side where the brake wheel 31 is located, thus moving them closer together. The brake arms 331 drive the brake shoes 32 on both sides to clamp onto the outer ring wall of the brake wheel 31, using the friction between the brake shoes 32 and the brake wheel 31 to perform braking.

[0023] During each braking process, the brake shoe 32 will wear out. When the left and right brake arms 331 move away from each other, the brake shoe 32 separates from the brake wheel 31. At this time, the pushing component pushes the brake shoe 32 to move slightly closer to the brake wheel 31 to compensate for the gap, which plays an automatic compensation role. This prevents the gap between the brake wheel 31 and the brake shoe 32 from becoming larger due to the gradual wear of the brake shoe 32, resulting in a longer brake stroke and a parking delay.

[0024] In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the compensation assembly 34 also includes a cuboid housing 341 fixedly mounted on the brake arm 331. The end of the housing 341 facing the brake wheel 31 is open. The pushing component is disposed inside the housing 341, and the pushing end of the pushing component is driven downward by the transmission component. A mounting component 344 is slidably connected in the horizontal direction inside the end of the housing 341 near the brake wheel 31. The mounting component 344 abuts against the pushing end of the pushing component. The brake shoe 32 is detachably mounted on the side of the mounting component 344 facing the brake wheel 31. When the pushing end of the pushing component moves downward, it pushes the mounting component 344 and the brake shoe 32 to move horizontally toward the brake wheel 31.

[0025] In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the pushing component includes a lead screw 342 that is vertically arranged and rotatably mounted on the housing 341. The lead screw 342 is driven to rotate by a transmission component. A lifting slider 343 is threadedly connected to the lead screw 342. The lifting slider 343 moves downward under the drive of the lead screw 342 to push the mounting component 344.

[0026] In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, guide blocks 346 are fixedly connected to both the front and rear sides of the lifting slider 343; the mounting component 344 includes a vertically arranged mounting plate 3441, which is a plate-shaped structure. The brake shoe 32 is fastened to the side of the mounting plate 3441 facing the brake wheel 31 by fasteners, and one end of the brake shoe 32 extends out from the opening of the housing. A pair of guide plates 3442 are vertically fixed to the side of the mounting plate 3441 away from the brake shoe 32. The guide plates 3442 are vertically arranged and distributed on the front and rear sides of the lifting slider 343. Each guide plate 3442 has an inclined groove 345. The inclined groove 345 is inclined with the end closer to the brake wheel 31 being higher and the end away from the brake wheel 31 being lower. The guide block 346 has the same inclination direction as the inclined groove 345, and the guide block 346 is slidably connected to the inclined groove 345. The mounting plate 3441 has a pair of guide rods 3444 distributed vertically on its front and rear sides, and the housing 341 has a pair of horizontal sliding grooves 3445 distributed vertically on its front and rear side walls. The guide rods 3444 slide in cooperation with the horizontal sliding grooves 3445. During operation, when the lifting slider 343 moves downward, the guide block 346 moves downward along the inclined sliding groove 345. At this time, the guide block 346 applies a downward thrust to the guide plate 3442 and a thrust toward the side where the brake wheel 31 is located. The thrust toward the side where the brake wheel 31 is located pushes the entire mounting component 344 and the brake shoe 32 toward the side where the brake wheel 31 is located, thereby achieving feed compensation.

[0027] In practical use, the transmission component 347 drives the lead screw 342 to rotate, and the lead screw 342 drives the lifting slider 343 to move downward. When the lifting slider 343 moves downward, it drives the guide block 346 to move together. The guide block 346 slides along the inclined slide groove 345. The mutual cooperation of the guide block 346 and the inclined slide groove 345 guides the mounting component 344 to move closer to the brake wheel 31. The mounting component 344 drives the brake shoe 32 to make a small feed to compensate for the gap, which can automatically compensate for wear and prevent the braking distance between the brake shoe 32 and the brake wheel 31 from increasing.

[0028] In this embodiment, as Figure 4-8As shown, the transmission components include a worm gear 3471, a ratchet mechanism 3472, a worm 3473, a drive gear 3474, and an arc-shaped rack 3475. The lower end of the lead screw 342 rotates through to the bottom of the housing 341 and then rotates to connect with the worm gear 3471. The lead screw 342 and the worm gear 3471 are connected by a ratchet mechanism 3472 for unidirectional transmission. The worm 3473 is connected to the worm gear 3471 for transmission. The worm 3473 is installed at the bottom of the housing 341. The rear end of the worm 3473 is coaxially fixedly connected to the drive gear 3474, that is, the worm 3473 and the drive gear 3474 are connected as a whole and rotate synchronously. The arc-shaped rack 3475 is located below the drive gear 3474 and the arc opening faces the side where the brake wheel 31 is located. The arc-shaped rack 3475 is installed on the base 11 and meshes with the drive gear 3474.

[0029] In this embodiment, as Figure 8 As shown, the ratchet mechanism 3472 is an internal meshing ratchet mechanism. The lead screw is connected to the inner hole of the internal meshing ratchet mechanism. The worm gear 3471 is annular, and its inner hole sidewall has a ring of internal teeth. There are two pawls located on the inner side. The two pawls are used to engage with the ring of internal teeth, and the pawls are connected to the spring.

[0030] In practical use, when the brake arm 331 rotates away from the brake wheel 31, the brake arm 331 drives the drive gear 3474 to rotate in the same direction (i.e., counterclockwise). At this time, the drive gear 3474 rolls along the arc-shaped rack 3475, which drives the drive gear 3474 to rotate. The drive gear 3474 then drives the worm 3473 to rotate synchronously. The worm 3473 drives the worm wheel 3471 to rotate. At this time, the pawl of the ratchet mechanism 3472 is engaged on one ring of internal teeth in the inner hole of the worm wheel 3471. The worm wheel 3471 drives the lead screw 342 to rotate through the ratchet mechanism 3472. Figure 10 As shown, the lead screw 342 can drive the lifting slider 343 to move downward, thereby pushing the brake shoe 32 to move closer to the brake wheel 31 for automatic compensation.

[0031] When the brake arm 331 rotates towards the brake wheel 31, the arc-shaped rack 3475 drives the drive gear 3474 to rotate in the opposite direction. The drive gear 3474 drives the worm 3473 to rotate in the opposite direction, and the worm 3473 drives the worm wheel 3471 to rotate in the opposite direction. When the worm wheel 3471 rotates in the opposite direction, the pawl of the ratchet mechanism 3472 is pressed inward and separated from one turn of the internal teeth. At this time, the ratchet mechanism 3472 cannot transmit motion to the lead screw 342, thus preventing the lead screw 342 from rotating in the opposite direction. Figure 11 As shown.

[0032] When the brake shoe 32 is clamped onto the surface of the brake wheel 31, the reaction force generated by the clamping of the brake shoe 32 tends to drive the lead screw 342 to rotate in the opposite direction. The lead screw 342, through the transmission of the ratchet mechanism 3472, tends to drive the worm gear 3471 to rotate in the opposite direction. Since the drive gear 3474 and the arc rack 3475 are always in a meshed state, when the brake spring 334 is in a state of pushing the brake arm 331, the drive gear 3474 will not rotate along the arc rack 3475, and thus will not rotate, thereby preventing the worm gear 3471 and the lead screw 342 from rotating in the opposite direction.

[0033] In this embodiment, as Figure 2 , 3 As shown, it also includes an auxiliary component 35, which includes a brake gear 351 coaxially fixedly mounted on the front side of the brake wheel 31. Brake racks 352 are symmetrically arranged on the left and right sides of the upper end of the brake gear 351. The mounting base 332 is provided with a linkage component 353 for driving the brake racks 352 to engage or disengage with the brake gear 351.

[0034] In this embodiment, as Figure 3 As shown, the linkage component 353 includes a swing rod 3531 hinged to the left and right ends of the mounting base 332. The swing rod 3531 is vertically arranged and its lower end is fixedly connected to the brake rack 352 located on the same side, and the two are connected as a whole. A connecting rod 3532 is hinged to the front side of the brake arm 331, and the end of the connecting rod 3532 away from the brake arm 331 is hinged to the corresponding swing rod 3531.

[0035] In practical use, when the magnetic telescopic rod 335 pushes the left and right brake arms 331 away from each other, the brake arm 331 pulls the lower end of the corresponding swing arm 3531 away from the brake gear 351 via the connecting rod 3532. This causes the connecting rod 3532 to separate the brake rack 352 from the brake gear 351, releasing the lock on the brake gear 351 and allowing the motor 1 to drive the traction wheel 2 and brake wheel 31 to rotate together. When the brake spring 334 pushes the brake arm 331 to move closer to the brake wheel 31 to apply brakes, the brake arm 331 pushes the swing arm 3531 closer to the brake gear 351 via the connecting rod 3532. This causes the brake rack 352 to engage and lock with the brake gear 351, locking the brake gear 351 and preventing it from rotating. This avoids insufficient braking performance due to wear of the brake shoe 32, thus improving the braking effect.

[0036] In this embodiment, as Figure 7 , 9As shown, the top left and right ends of the base 11 are provided with adjustment components 36 for supporting the arc-shaped rack 3475. The adjustment components 36 include a support frame 361 that is slidably installed on the top of the base 11 in the front-back direction. The arc-shaped rack 3475 is fixedly installed on the top of the support frame 361. A T-shaped slide rail 362 arranged in the front-back direction is fixedly installed on the top of the base 11. A T-shaped slide groove 363 is opened at the bottom of the support frame 361. The T-shaped slide groove 363 is slidably connected to the T-shaped slide rail 362 in the front-back direction. A fixing bolt 364 is also threaded on the support frame 361. When the fixing bolt 364 is tightened downwards, the support frame 361 is fixed together with the base 11.

[0037] In this embodiment, a handle 348 is fixedly installed on the top of the lead screw 342 after it extends through the top of the housing 341.

[0038] In practical use, when replacing the brake shoe 32, the mounting part 344 needs to be moved away from the brake shoe 32 and restored to its initial position. During adjustment, first loosen the fixing bolt 364 to release the fixation of the support frame 361, then move the support frame 361 forward. The support frame 361 drives the arc rack 3475 forward, so that the arc rack 3475 separates from the drive gear 3474, releasing the restriction on the drive gear 3474. At this time, rotate the handle 348 to drive the lead screw 342 to rotate in the opposite direction, so that the lead screw 342 drives the lifting slider 343 to move upward. The lifting slider 343 guides the mounting part 344 and the brake shoe 32 to move away from the brake wheel 31 and reset through the mutual cooperation of the inclined slide groove 345 and the guide block 346.

[0039] The advantages of this invention are: 1. When the brake shoes wear out during braking, and the left and right brake arms move away from each other, the brake shoes separate from the brake wheel. At this time, the transmission component drives the lead screw to rotate, and the lead screw drives the lifting slider to move downward. When the lifting slider moves downward, it drives the guide block to move together. The guide block slides along the inclined slide groove. The cooperation between the guide block and the inclined slide groove guides the mounting component to move closer to the brake wheel. The mounting component drives the brake shoes to make a small feed to compensate for the gap, which plays an automatic compensation role and avoids the situation where the gap between the brake wheel and the brake shoes increases due to the gradual wear of the brake shoes, the brake stroke becomes longer, and the stopping delay occurs.

[0040] 2. When the brake spring pushes the brake arm to move closer to the brake wheel to apply brakes, the brake arm pushes the rocker arm to move closer to the brake gear through the connecting rod, so that the brake rack and the brake gear are engaged and locked. The brake rack locks the brake gear to prevent the brake gear from rotating, avoids insufficient braking performance due to wear of the brake shoes, and improves the braking effect.

[0041] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0042] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0043] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An elevator traction machine with automatic brake wear compensation function, comprising a motor (1), a traction sheave (2), and a braking unit (3), wherein the traction sheave (2) is mounted on the output shaft of the motor (1); the braking unit (3) comprises a brake wheel (31) and a brake assembly (33), wherein the brake wheel (31) is coaxially and fixedly connected to the traction sheave (2), and brake shoes (32) are provided on both the left and right sides of the brake wheel (31); the brake assembly (33) comprises brake arms (331) symmetrically arranged on the left and right sides of the brake wheel (31) and rotatable, the brake arms (331) being used to drive the brake shoes (32) to apply brake braking to the brake wheel (31); characterized in that: Each brake arm (331) is provided with a compensation component (34) for driving the brake pad (32) to move toward the brake wheel (31) for wear compensation. The compensation component (34) includes a pushing component, which is connected to the brake arm (331) through a transmission component. When the brake arm (331) rotates toward the side away from the brake wheel (31), the pushing component is driven by the transmission component to push toward the side where the brake wheel (31) is located, so as to push the brake pad (32) to feed compensation toward the brake wheel (31).

2. An elevator traction machine with automatic brake wear compensation function according to claim 1, characterized in that: The compensation component (34) also includes a housing (341) fixedly mounted on the brake arm (331). The pushing component is disposed inside the housing (341), and the pushing end of the pushing component is driven downward by the transmission component. The housing (341) has a mounting component (344) slidably connected in the horizontal direction at one end near the brake wheel (31). The mounting component (344) abuts against the pushing end of the pushing component. The brake shoe (32) is detachably mounted on the side of the mounting component (344) facing the brake wheel (31). When the pushing end of the pushing component moves downward, it pushes the mounting component (344) and the brake shoe (32) to move horizontally toward the brake wheel (31).

3. An elevator traction machine with automatic brake wear compensation function according to claim 2, characterized in that: The pushing component includes a lead screw (342) that is vertically arranged and rotatably mounted on the housing (341). The lead screw (342) is driven to rotate by a transmission component. A lifting slider (343) is threaded onto the lead screw (342). The lifting slider (343) moves downward under the drive of the lead screw (342) to push the mounting component (344).

4. An elevator traction machine with automatic brake wear compensation function according to claim 3, characterized in that: The motor (1) is mounted on a base (11), and the lower end of the brake arm (331) is hinged to the top of the base; the transmission components include a worm gear (3471), a ratchet mechanism (3472), a worm (3473), a drive gear (3474), and an arc rack (3475). The lower end of the lead screw (342) rotates through to the bottom of the housing (341) and then rotates to connect with the worm gear (3471). The lead screw (342) and the worm gear (3471) are connected. The components are connected by a ratchet mechanism (3472) for one-way transmission; the worm (3473) is connected to the worm wheel (3471) for transmission, and the rear end of the worm (3473) is coaxially fixedly connected to the drive gear (3474); the arc-shaped rack (3475) is located below the drive gear (3474) and the arc opening faces the side where the brake wheel (31) is located. The arc-shaped rack (3475) is mounted on the base (11) and meshes with the drive gear (3474).

5. An elevator traction machine with automatic brake wear compensation function according to claim 3, characterized in that: Guide blocks (346) are fixedly connected to both the front and rear sides of the lifting slider (343); the mounting component (344) includes a vertically mounted mounting plate (3441) detachably connected to the brake shoe (32), a pair of guide plates (3442) are fixed to the side of the mounting plate (3441) away from the brake shoe (32), the pair of guide plates (3442) are distributed on the front and rear sides of the lifting slider (343), and each guide plate (3442) is provided with an oblique groove (345). The inclined slide groove (345) is inclined with one end higher than the brake wheel (31) and the other end lower than the brake wheel (31). The guide block (346) is slidably connected to the inclined slide groove (345). The front and rear sides of the mounting plate (3441) are provided with a pair of upper and lower distributed guide rods (3444). The front and rear side walls of the housing (341) are provided with a pair of upper and lower distributed horizontal slide grooves (3445). The guide rods (3444) are slidably engaged with the horizontal slide grooves (3445).

6. An elevator traction machine with automatic brake wear compensation function according to claim 1, characterized in that: The brake assembly (33) also includes a mounting base (332) fixedly installed on the top of the motor (1). A horizontally arranged brake rod (333) is installed on both the left and right ends of the mounting base (332). The upper end of the brake arm (331) is provided with a through hole for the brake rod (333) located on the same side to pass through. A brake spring (334) is provided between the end of the brake rod (333) away from the mounting base (332) and the brake arm (331). A magnetic telescopic rod (335) for driving the upper ends of the left and right brake arms (331) to move away from each other is fixedly installed on the top of the mounting base (332).

7. An elevator traction machine with automatic brake wear compensation function according to claim 6, characterized in that: It also includes an auxiliary component (35), which includes a brake gear (351) coaxially fixedly mounted on the front side of the brake wheel (31). Brake racks (352) are symmetrically arranged on the left and right sides of the upper end of the brake gear (351). The mounting base (332) is provided with a linkage component (353) for driving the brake rack (352) to engage or disengage with the brake gear (351).

8. An elevator traction machine with automatic brake wear compensation function according to claim 7, characterized in that: The linkage component (353) includes a rocker arm (3531) hinged to the left and right ends of the mounting base (332). The rocker arm (3531) is vertically arranged and its lower end is fixedly connected to the brake rack (352) located on the same side. A connecting rod (3532) is hinged to the front side of the brake arm (331). The end of the connecting rod (3532) away from the brake arm (331) is hinged to the corresponding rocker arm (3531).

9. An elevator traction machine with automatic brake wear compensation function according to claim 4, characterized in that: The base (11) has adjustment components (36) at its top left and right ends for supporting the arc-shaped rack (3475). The adjustment components (36) include a support frame (361) slidably mounted on the top of the base (11). The arc-shaped rack (3475) is fixedly mounted on the top of the support frame (361). A T-shaped slide rail (362) is fixedly mounted on the top of the base (11). A T-shaped groove (363) is opened at the bottom of the support frame (361). The T-shaped groove (363) and the T-shaped slide rail (362) are slidably connected back and forth. A fixing bolt (364) is also threaded onto the support frame (361). When the fixing bolt (364) is tightened downwards, the support frame (361) is fixed together with the base (11).

10. An elevator traction machine with automatic brake wear compensation function according to claim 4, characterized in that: A handle (348) is fixedly installed on the top of the lead screw (342) after it extends through the top of the housing (341).

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