Elevator strong-drive traction machine

Abstract

The invention discloses an elevator strong-drive traction machine and relates to the technical field of traction machines, the elevator strong-drive traction machine comprises a driving device, a traction wheel and a braking system, the driving device is a motor, an output shaft of the driving device is connected with the traction wheel through a planetary reducer, and the motor is installed on a double-layer bottom frame and comprises a top plate, a supporting column and a reinforcing column. A receding groove for a steel wire rope to penetrate through is formed in the top plate in an up-down penetrating mode, and the self-locking mechanism is arranged below the traction wheel and located on the reinforcing column. The self-locking mechanism comprises a moving assembly and a clamping assembly. The problems that in the prior art, due to long-term friction between a traction wheel and a steel wire rope, the slipping phenomenon occurs between the traction wheel and the steel wire rope, and then the braking effect is affected are solved. The self-locking traction sheave has the advantages that by arranging the self-locking structure, after the traction sheave is braked, when the steel wire rope continues to fall due to slipping, the steel wire rope can be locked and braked emergently, and potential safety hazards are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of traction machines, and particularly to a high-torque elevator traction machine. Background Art

[0002] A traction machine is the power equipment of an elevator, which consists of a motor, a brake, a coupling, a speed reducer, a traction wheel, a frame, a guide wheel, an auxiliary handwheel for disk driving, etc. In order to meet the requirements of large load capacity and high speed, generally, the driving force is improved through the design of high torque output and multi-rope friction drive.

[0003] In the prior art, when the traction machine is working, its core principle is to drive the car to lift and lower through the friction between the traction wheel and the steel wire rope. Therefore, the long-term friction between the traction wheel and the steel wire rope is an inevitable mechanical contact process. However, continuous friction for a long time will cause slippage between the traction wheel and the steel wire rope, which not only affects the operation efficiency of the elevator, but also may cause serious safety hazards. For example, slippage may cause a sudden drop in the traction force of the traction machine and the car to fall out of control.

[0004] To solve the above technical problems, the present invention discloses a high-torque elevator traction machine, which has the advantages that by setting a self-locking structure, when the traction wheel is braked and the steel wire rope continues to fall due to slippage, the steel wire rope can be emergently locked and braked to avoid safety hazards. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-torque elevator traction machine to solve the technical problems in the prior art that long-term friction between the traction wheel and the steel wire rope will cause slippage between the traction wheel and the steel wire rope, thereby affecting the braking effect. The present invention has the advantages that by setting a self-locking structure, when the traction wheel is braked and the steel wire rope continues to fall due to slippage, the steel wire rope can be emergently locked and braked to avoid safety hazards.

[0006] The present invention is realized through the following technical solutions: The present invention discloses a high-torque elevator traction machine, which includes a driving device, a traction wheel and a braking system. The driving device is a motor, and its output shaft is connected to the traction wheel through a planetary speed reducer. The motor is installed on a double-layer chassis, which includes a top plate, a support column and a reinforcement column. The top plate is provided with a through slot for the steel wire rope to pass through, and further includes a self-locking mechanism, which is arranged below the traction wheel and on the reinforcement column; The self-locking mechanism includes a moving component and a clamping component. The moving component is triggered to move horizontally by the traction machine braking, and the clamping component locks the steel wire rope when the steel wire rope is abnormally displaced. The self-locking mechanism and the traction machine braking system form a double braking; The moving component includes a slide rail and a driving part. The slide rail is composed of a rail and a slider, and the slider is connected to the clamping component; The clamping assembly includes two symmetrically arranged trigger wheels, and the two trigger wheels are controlled to move towards and away from each other through a moving assembly.

[0007] Furthermore, the trigger wheel is connected to the bearing seat through a rotating shaft, the bearing seat is fixed on the slider, and the outer wall of the trigger wheel is divided into a same-diameter section and a diameter-expanded section along the circumference.

[0008] Furthermore, the outer diameter of the same-diameter section is smaller than that of the diameter-expanded section, and the same-diameter section is at the opposite ends of the trigger wheel.

[0009] Furthermore, the diameter-expanded section of the trigger wheel is such that the outer diameter gradually expands along the circumferential direction from one end of the same-diameter section, and the diameter-expanded section extends to the center of the opposite side of the trigger wheel, where the outer diameter reaches the maximum value. When the displacement of the wire rope exceeds the limit, the contact area between the diameter-expanded section and the wire rope gradually increases, and the clamping force increases linearly.

[0010] Furthermore, the upper and lower diameter-expanded sections of the trigger wheel are symmetrically arranged.

[0011] Furthermore, the braking system and the self-locking mechanism are linked through a controller. When the braking system brakes, the two trigger wheels move towards each other and contact the wire rope.

[0012] Furthermore, the sliders at both ends of the rotating shaft are fixedly connected through a connecting rod, the driving part adopts an electric push rod, and the telescopic shaft of the electric push rod is connected to the connecting rod.

[0013] Furthermore, an anti-slip layer is provided on the outer wall of the trigger wheel.

[0014] Furthermore, the trigger wheel is reset and rotated through a reset assembly, which includes a guide disk, a guide groove, and a guide wheel. The guide disk is fixedly sleeved outside the rotating shaft and is concentric with each other. The guide groove is opened on the disk body of the guide disk and extends along the direction of the opposite movement of the trigger wheel, presenting an isosceles triangle with a rounded tip. The guide wheel is connected to the mounting plate through a guide rod and is arranged opposite to the tip of the guide groove.

[0015] The present invention has the following advantages: (1) By setting the self-locking mechanism in the present invention, when the traction wheel brakes and the wire rope continues to drop due to slipping, the wire rope can be emergently locked and braked, avoiding potential safety hazards. And the self-locking mechanism is set to be triggered by two conditions, so that the clamping assembly will only lock the wire rope when necessary, that is, when the traction wheel brakes and the wire rope braking fails, thereby reducing the wear of the self-locking mechanism.

[0016] (2) By providing a trigger wheel in the present invention, and arranging a same-diameter section and an expanded-diameter section along the circumferential direction on the trigger wheel, and setting the length of the same-diameter section to match the normal displacement of the wire rope, in the initial state, the trigger wheel is in low-friction contact with the wire rope. After the traction wheel stops rotating, when the wire rope has a small displacement due to inertia, the same-diameter section of the trigger wheel is in contact, and no clamping force is generated, avoiding triggering the clamping action every time of braking, resulting in unnecessary contact between the trigger wheel and the wire rope, accelerating wear. By providing an expanded-diameter section, the wire rope drives the trigger wheel into the expanded-diameter section, and then the outer diameter gradually increases through the gradually expanding section, ensuring that the clamping force increases linearly with the displacement of the wire rope and avoiding impact. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the separation of the trigger wheel and the wire rope of the present invention; Figure 3 is a schematic diagram of the pre-contact of the trigger wheel and the wire rope of the present invention; Figure 4 is a schematic diagram of the trigger wheel locking the wire rope of the present invention; Figure 5 is a schematic diagram of the front structure of the trigger wheel of the present invention; Figure 6 is a schematic diagram of the structure of the self-locking mechanism of the present invention; Figure 7 is a schematic diagram of the structure of the guide disk of the present invention.

[0018] In the figure: 1, driving device; 2, traction wheel; 3, braking system; 4, chassis; 5, self-locking mechanism; 6, connecting column; 7, relief groove; 8, mounting plate; 9, through groove; 10, expanded-diameter section; 11, same-diameter section; 12, rotating shaft; 13, limit switch; 14, connecting rod; 15, reset assembly; 16, guide rod; 17, fixed seat; 401, top plate; 402, support column; 403, reinforcement column; 501, moving assembly; 502, clamping assembly; 511, slide rail; 512, driving part; 5111, rail; 5112, slider; 521, trigger wheel; 522, bearing seat; 151, guide disk; 152, guide groove; 153, guide wheel. Detailed Embodiment

[0019] The following is a detailed description of the embodiments of the present invention. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating orientation or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0020] The embodiment discloses an elevator forced drive traction machine. As Figures 1-7 shown, it includes a driving device 1 and a traction wheel 2, and also includes a braking system 3. Among them, as Figure 1 shown, the driving device 1 is a motor, and the motor is installed on the chassis 4. The traction wheel 2 is driven to rotate by starting the motor. A steel wire rope is provided outside the traction wheel 2. The traction wheel 2 is driven to rotate by the motor, generates static friction when contacting the steel wire rope, transmits power, and realizes the lifting and lowering of the car through the cooperative mechanism of the guide wheel for auxiliary positioning. When it is necessary to stop, the braking system 3 brakes the traction wheel 2. After the braking system 3 is started, the traction wheel 2 stops rotating, and the steel wire rope stops moving accordingly. Due to the connection relationship between the steel wire rope and the car, finally the car stops at the target floor position.

[0021] A speed reducer is connected to the output shaft of the motor. In this embodiment, the speed reducer is set as a planetary speed reducer. Through the application of the planetary speed reducer, the traction wheel 2 can obtain a larger output torque at a lower input speed, improving the transmission efficiency, reducing energy loss, at the same time reducing the load and starting current of the motor, and prolonging the service life of the motor. In addition, high-precision gear processing and optimized connection design reduce vibration and noise during operation, improving the stability and comfort of the equipment.

[0022] In actual operation, according to the prior art, it can be known that the long-term friction between the traction wheel 2 and the steel wire rope is an inevitable mechanical contact process. However, continuous long-term friction will cause the surface roughness of the contact surface to decrease, resulting in a reduction in the friction coefficient, and there will also be wear on the traction wheel 2, resulting in a decrease in the contact area, and then slipping between the traction wheel 2 and the steel wire rope. Once the slipping phenomenon occurs, it will lead to the failure of the traction wheel 2 to brake, easily causing safety accidents such as the car getting out of control and falling. Therefore, in this embodiment, by setting a self-locking mechanism 5, after braking, the steel wire rope can be locked, and then double braking is carried out to improve the safety performance.

[0023] And through the self-locking mechanism 5 adopting double braking, if the self-locking mechanism 5 and the braking system 3 of the traction machine itself operate simultaneously, then the self-locking mechanism 5 will also have wear. Therefore, in this embodiment, the self-locking mechanism 5 is set to be conditionally triggered, that is, the self-locking mechanism 5 will only trigger to lock the steel wire rope when the triggering conditions are met, thereby avoiding the synchronous wear of the locking contact surface of the self-locking mechanism 5 and the traction wheel 2 caused by frequent triggering, and avoiding the failure of the self-locking mechanism 5 due to excessive wear when the traction wheel 2 and the steel wire rope slip.

[0024] The triggering conditions of the self-locking mechanism 5 are set as double triggering conditions. Specifically, after the traction wheel 2 is braked and the steel wire rope continues to move, the self-locking mechanism 5 performs a locking brake on the steel wire rope.

[0025] Specifically, as Figure 1 shown, the chassis 4 is set as a double-layer chassis 4, including a top plate 401, a support column 402 and a reinforcement column 403. Among them, the motor is installed on the top plate 401, and a relief groove 7 is vertically penetrated through the top plate 401, so that the steel wire rope on the traction wheel 2 can pass through the relief groove 7 to be connected to the car. And the bottom of the periphery of the top plate 401 is fixedly provided with support columns 402, and the bottom sections of the four support columns 402 are respectively reinforced and connected by four reinforcement columns 403. And a connecting column 6 is fixedly connected between the two reinforcement columns 403 on both sides. There is space on both the front and back sides of the connecting column 6 to make way for the steel wire rope, and the self-locking mechanism 5 is connected to the connecting column 6 and the reinforcement column 403. As Figure 1 and Figure 6 shown, the self-locking mechanism 5 includes a moving component 501 and a clamping component 502. An installation plate 8 is fixedly connected to the reinforcement column 403 and the connecting column 6, and the installation plate 8 is located at the rear end relief space of the connecting column 6, that is, the self-locking mechanism 5 only brakes one side of the steel wire rope. A through groove 9 is vertically penetrated through the installation plate 8 to make way for the steel wire rope, so that the steel wire rope can pass through the installation plate 8. The moving component 501 is installed on the installation plate 8 to control the clamping component 502 to clamp and lock the steel wire rope, thereby braking the steel wire rope. The movement of the moving component 501 is triggered by the braking of the traction wheel 2, and the clamping operation of the clamping component 502 is triggered by the movement of the steel wire rope. And it should be noted that the sequence is set as follows: after the traction wheel 2 is powered off and braked, the moving component 501 moves, so that the clamping surface of the clamping component 502 contacts the steel wire rope. When the steel wire rope continues to move, the clamping component 502 performs a clamping operation to brake the steel wire rope.

[0026] It should also be noted that when the clamping surface of the clamping component 502 is not braked, that is, when the traction machine is working normally, there is a gap between the clamping surface and the steel wire rope, thereby avoiding the wear of the clamping surface caused by the steel wire rope during normal operation and resulting in braking failure.

[0027] Therefore, through the above double-condition triggering, the clamping assembly 502 will lock the steel wire rope only when necessary, that is, after the traction sheave 2 is braked and the steel wire rope braking fails, thereby reducing the wear of the self-locking mechanism 5. Compared with the single-condition triggering by the braking of the traction sheave 2, every time the traction sheave 2 is braked, the two trigger wheels 521 need to clamp the steel wire rope once. Whether the braking of the traction sheave 2 fails or not, and under the single-trigger condition, the same pressure is applied every time of braking, which will cause indentations on the surface of the steel wire rope due to compression. In the long run, the damage of the steel wire rope will accumulate, resulting in a reduction in the service life of the steel wire rope. However, the double-trigger condition is triggered only when necessary, reducing unnecessary wear and also reducing the clamping damage to the steel wire rope; Compared with the single-condition triggering by the movement of the steel wire rope, the clamping assembly 502 needs to be in contact with the steel wire rope in the initial state. During the long-term normal operation of the steel wire rope, the steel wire rope will wear the clamping surface of the clamping assembly 502, affecting the subsequent emergency braking effect. Therefore, the double-condition triggering has higher safety.

[0028] Specifically, as Figure 1 and Figure 6 shown, the moving assembly 501 includes a slide rail 511 and a driving part 512. The slide rail 511 is used to limit the horizontal movement of the clamping assembly 502, making the horizontal movement accuracy of the clamping assembly 502 higher. The driving part 512 is used to drive the movement of the clamping assembly 502. In this embodiment, the driving part 512 is mainly used to make the clamping assembly 502 move horizontally, and in the prior art, it can be realized in various ways. For example, the driving part 512 can be set as an electric push rod. By starting the electric push rod, the telescopic shaft can be telescoped, thereby controlling the horizontal movement of the clamping assembly 502. The driving part 512 can also be set to be controlled by a lead screw. Through lead screw transmission, the clamping assembly 502 can realize horizontal movement. In addition, in other embodiments, it can also be set to be controlled by a braking technology similar to that of the traction machine. When the elevator stops, the braking coil is powered off, and the clamping assembly 502 is horizontally moved by relying on the spring force, so as to realize the clamping of the horizontal movement of the clamping assembly 502.

[0029] It should be noted that regardless of the driving method, the horizontal movement of the clamping assembly 502 is started after the traction sheave 2 is braked. For example, when the driving control is performed by an electric push rod, the electric push rod and the traction machine braking system 3 are controlled by a controller. After the traction machine braking system 3 brakes, the electric push rod starts, so that after the traction machine brakes the traction sheave 2, the electric push rod starts, making the clamping assembly 502 move horizontally, and then making the clamping surface contact the steel wire rope.

[0030] Refer to Figure 6, the slide rail 511 includes a rail 5111 and a slider 5112. Among them, the rail 5111 is fixed on the mounting plate 8, and the slider 5112 is slidably arranged on the rail 5111.

[0031] The clamping assembly 502 includes two symmetrically arranged trigger wheels 521 and a bearing seat 522 connected to the trigger wheels 521. Among them, there are also two rotating shafts 12. The two rotating shafts 12 are arranged front and back in the radial direction of the traction wheel 2 on the mounting plate 8. The two rotating shafts 12 are rotatably arranged on the mounting plate 8 through the bearing seats 522. Sliders 5112 are fixed below the bearing seats 522 at both ends of the two rotating shafts 12. The sliders 5112 are slidably arranged on the rail 5111. The two trigger wheels 521 are fixedly sleeved outside the two rotating shafts 12, and the two trigger wheels 521 are symmetrically arranged front and back. Furthermore, through the cooperation of the slider 5112 and the rail 5111, the two trigger wheels 521 can move horizontally along the radial direction of the traction wheel 2, so that the outer circumferential outer walls of the two trigger wheels 521 can clamp or separate from the steel wire rope; It should be noted that a connecting rod 14 is fixed between the sliders 5112 at both ends of the rotating shaft 12, and the telescopic shaft of the electric push rod is fixedly connected to the connecting rod 14. Furthermore, the trigger wheel 521 can be controlled to move through the electric push rod. In addition, the movement of the trigger wheel 521 is limited by the limit switch 13.

[0032] It should also be noted that the axial length of the trigger wheel 521 matches the axial length of the traction wheel 2. In other words, multiple strands of steel wire ropes on the traction wheel 2 are all within the clamping range of the two trigger wheels 521. Furthermore, when the trigger wheels 521 move towards each other to clamp and brake the steel wire rope, effective braking can be achieved. And in this embodiment, anti-slip texture patterns can be provided on the outer wall of the trigger wheel 521 to increase the friction force after the trigger wheel 521 contacts the steel wire rope and improve the braking effect. An anti-slip rubber cushion layer can also be provided on the outer wall of the trigger wheel 521 to achieve the anti-slip effect.

[0033] In order to make the clamping of the steel wire rope by the trigger wheel 521 be triggered by the movement of the steel wire rope, the trigger wheel 521 is set to have an outer diameter that gradually expands along the circumferential direction. The opposite sides of the two trigger wheels 521 are small-diameter sections, and the opposite sides are large-diameter sections; Specifically, as Figure 5 and Figure 6As shown in the figure, the trigger wheel 521 is divided into a same-diameter section 11 and an expanded-diameter section 10 along the circumferential direction. Among them, the same-diameter section 11 extends along the circumference from the vertex of the opposite sides of the two trigger wheels 521 towards the end point of the opposite side of the trigger wheel 521. And the front section is the same-diameter section 11. The center of the same-diameter section 11 is concentric with the rotating shaft 12. The outer diameter of the same-diameter section 11 is constant, and the outer diameter of the same-diameter section 11 is smaller than that of the expanded-diameter section 10. And the rear section is the expanded-diameter section 10. The expanded-diameter section 10 starts from the end of the same-diameter section 11 and its outer diameter gradually increases along the circumferential direction, forming a continuous curved surface transition. The expanded-diameter section 10 extends to the center of the opposite side of the trigger wheel 521, and the outer diameter reaches the maximum value. In addition, the same-diameter section 11 and the expanded-diameter section 10 are connected by an arc transition surface, and the transition surface is tangent to both the same-diameter section 11 and the expanded-diameter section 10.

[0034] In this embodiment, this vertex is the point where the opposite sides of the two trigger wheels 521 are closest to each other in the circumferential direction. In other words, if the two trigger wheels 521 are cut along the horizontal center line, the trigger wheel 521 will be presented as upper and lower semi-circles. And the vertex is the end point of the opposite end, and the end point is the end point of the opposite side. The upper semi-circle and the lower semi-circle are symmetrically distributed. That is, the expanded-diameter section 10 of the upper half trigger wheel 521 and the expanded-diameter section 10 of the lower half trigger wheel 521 are mirror-symmetrical about the axis, and the same-diameter sections 11 of the upper and lower semi-circles are also symmetrically arranged.

[0035] It should be noted that in the normal state, after the traction wheel 2 is braked and stops rotating, due to inertia and other reasons, for example, the inertial force of the car and the load will continue to act on the steel wire rope, resulting in its instantaneous displacement. Therefore, there will be a slight displacement of the steel wire rope, and this is a normal phenomenon. And the displacement of the steel wire rope is used as the trigger condition, and then it is clamped. Therefore, when the steel wire rope is displaced normally, the trigger wheel 521 will rotate accordingly. And if the circumference of the trigger wheel 521 is the expanded-diameter section 10 and the outer diameter gradually expands, it will cause the trigger wheel 521 to rotate under the normal displacement of the steel wire rope, resulting in a certain clamping force on the steel wire rope. Each braking will trigger the clamping action, resulting in unnecessary contact between the trigger wheel 521 and the steel wire rope, accelerating wear, and increasing wear over time. Therefore, in this embodiment, by setting the same-diameter section 11, the stroke of the same-diameter section 11 is matched with the normal displacement of the steel wire rope. In this embodiment, it can be set to ≤20mm. In other words, the stroke of the trigger wheel 521 driven by the normal displacement of the steel wire rope is within the same-diameter section 11. And once the steel wire rope enters the expanded-diameter section 10, it means that the displacement of the steel wire rope exceeds the limit, and then it needs to be clamped and braked. Therefore, through the division of labor between the same-diameter section 11 and the expanded-diameter section 10, the normal displacement is limited within the same-diameter section 11, avoiding premature clamping of the trigger wheel 521, thereby reducing wear.

[0036] As Figure 4As shown, and through the setting of the diameter-expanding section 10, when the steel wire rope slips with the traction wheel 2 and the displacement of the steel wire rope exceeds the limit, if the steel wire rope is directly clamped and locked at this time, it will cause an impact. However, through the setting of the diameter-expanding section 10, the steel wire rope drives the trigger wheel 521 into the diameter-expanding section 10, and then the outer diameter of the gradually expanding section gradually increases, ensuring that the clamping force increases linearly with the displacement of the steel wire rope and avoiding impact.

[0037] In addition, by setting the diameter-expanding section 10 to be symmetric up and down, when the steel wire rope moves upward, it contacts the gradually expanding section of the upper half trigger wheel 521, and when the steel wire rope moves downward, it contacts the gradually expanding section of the lower half trigger wheel 521.

[0038] It should be noted that in this embodiment, the limit switch 13 limits the slider 5112 such that when the two trigger wheels 521 move towards each other, the trigger wheel 521 moves to contact the outer wall with the steel wire rope and stops after having a slight contact pressure. At this time, it is in a low-friction state, as Figure 3 shown, and when the two trigger wheels 521 move away from each other, the two trigger wheels 521 move to stop at a distance from the steel wire rope separation, as Figure 2 shown.

[0039] And through the rotational connection between the trigger wheel 521 and the bearing seat 522, the trigger wheel 521 can rotate freely and smoothly. When the two trigger wheels 521 move towards each other and contact the steel wire rope, the movement of the steel wire rope will drive the trigger wheel 521 to rotate, thereby reducing wear. At the same time, the rotation of the trigger wheel 521 can trigger the progressive clamping of the steel wire rope based on the displacement amount of the steel wire rope.

[0040] During each braking, after the normal displacement of the steel wire rope, the trigger wheel 521 will not contact and clamp the steel wire rope with the diameter-expanding section 10. When the car moves again, at this time, the electric push rod is first started to make the two trigger wheels 521 move away from each other and separate from the steel wire rope. It should be noted that the start and contraction of the electric push rod are started before the traction wheel 2 rotates, so that before the steel wire rope moves, the trigger wheel 521 moves away from each other and separates from the steel wire rope. After the trigger wheel 521 is reset, since during braking, when the steel wire rope has a normal displacement, the steel wire rope will drive the trigger wheel 521 to rotate. Although it is within the same-diameter section 11, after the trigger wheel 521 is reset, the trigger wheel 521 needs to be reset and rotated so that the same-diameter section 11 continues to rotate to the side where the two trigger wheels 521 face each other. Therefore, in this embodiment, by setting the reset component 15, after each horizontal movement reset of the trigger wheel 521, it can be reset and rotated.

[0041] As Figure 1 、 Figure 6 and Figure 7As shown, the reset assembly 15 includes a guide plate 151, a guide groove 152 and a guide wheel 153, wherein each trigger wheel 521 is coaxially provided with a guide plate 151, the guide plate 151 is fixedly sleeved on the outside of the rotating shaft 12 and keeps concentricity, and the plate body of the guide plate 151 is provided with an isosceles triangle-shaped guide groove 152 along the opposite movement direction of the trigger wheel 521, and the tip of the guide groove 152 is arc-shaped, and the guide wheel 153 is on the same horizontal line as the tip of the guide groove 152, and the guide wheel 153 is located at the trigger wheel 521. In the opposite direction, when the trigger wheel 521 rotates within the same diameter section 11, when the trigger wheel 521 moves horizontally in the opposite direction, the guide plate 151 can be straightened through the contact between the inclined surface of the guide groove 152 and the guide wheel 153, thereby resetting the trigger wheel 521. The guide wheel 153 is set at one end of the guide rod 16, and the guide rod 16 is connected to the mounting plate 8 through the fixing seat 17. The guide wheel 153 is rotatably set at one end of the guide rod 16, thereby reducing the friction between the guide wheel 153 and the groove wall of the guide groove 152.

[0042] In other embodiments, the guide wheel 153 can be controlled to move horizontally by a linear drive device, so that when the trigger wheel 521 rotates to the expanded diameter section 10, when the trigger wheel 521 is subsequently horizontally displaced and reset, the guide wheel 153 can be moved horizontally to avoid the guide wheel 153 and the outer wall of the guide plate 151 from being stuck.

[0043] The principle of the present invention is as follows: When the present invention is braking, first, after the traction machine is braked by the braking system 3, at this time, the traction wheel 2 stops. According to the normal braking process, the steel wire rope will stop, and then the car will stop moving. After the traction wheel 2 is braked, the two trigger wheels 521 will move towards each other under the action of the electric push rod, so that the two trigger wheels 521 will move to the outer circumferential outer wall to contact the steel wire rope, and have a slight contact pressure, so that the movement of the steel wire rope can drive the trigger wheel 521 to rotate. In the normal state, if the braking of the steel wire rope is effective, then the steel wire rope may have a certain slight displacement due to inertia and other reasons, which is a normal phenomenon. In the initial state, the same-diameter section 11 of the trigger wheel 521 contacts the steel wire rope, and the stroke of this same-diameter section 11 matches the slight displacement stroke of the steel wire rope after braking in the normal state. Within this stroke, the same-diameter section 11 of the trigger wheel 521 contacts the steel wire rope and is driven to rotate by the movement of the steel wire rope. Since the trigger wheel 521 rotates through the bearing seat 522, the outer wall of the trigger wheel 521 will not be over-friction. Once the displacement of the steel wire rope after braking exceeds the limit, that is, exceeds the normal displacement amount, there will be a slipping phenomenon of the steel wire rope. At this time, the contact part between the trigger wheel 521 and the steel wire rope will exceed the same-diameter section 11 and enter the expanded-diameter section 10. As the expanded-diameter sections 10 of the two trigger wheels 521 continuously contact the steel wire rope, the steel wire rope will be gradually clamped in a progressive manner, and then the steel wire rope will be locked, and further, the outer diameter of the gradually expanding section will gradually increase to ensure that the clamping force increases linearly with the displacement of the steel wire rope, avoiding impact.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An elevator strong drive traction machine, comprising a driving device (1), a traction wheel (2) and a braking system (3), wherein the driving device (1) is an electric motor, whose output shaft is connected to the traction wheel (2) through a planetary reducer, and the electric motor is installed on a double-layer base frame (4), and comprises a top plate (401), a support column (402) and a reinforcement column (403), wherein the top plate (401) is provided with a clearance groove (7) through the top and bottom for the wire rope to pass through, and characterized in that: It also includes a self-locking mechanism (5) which is arranged below the traction wheel (2) and on the reinforcement column (403); The self-locking mechanism (5) comprises a moving component (501) and a clamping component (502), wherein the moving component (501) moves horizontally through the traction machine braking trigger, and the clamping component (502) locks the steel wire rope when the steel wire rope is abnormally displaced, and the self-locking mechanism (5) and the traction machine braking system (3) form a double brake; The moving assembly (501) comprises a slide rail (511) and a driving part (512); the slide rail (511) is composed of a rail bar (5111) and a slider (5112); the slider (5112) is connected to the clamping assembly (502); The clamping assembly (502) comprises two symmetrically arranged trigger wheels (521), and the two trigger wheels (521) are controlled to move towards and away from each other through the moving assembly (501).

2. The elevator strong drive traction machine according to claim 1, characterized in that: The trigger wheel (521) is connected to the bearing seat (522) via a rotating shaft (12); the bearing seat (522) is fixed on a slider (5112); and the outer wall of the trigger wheel (521) is divided into a uniform diameter section (11) and an enlarged diameter section (10) along the circumference.

3. The elevator strong drive traction machine according to claim 2, characterized in that: The outer diameter of the same diameter section (11) is smaller than that of the expanded diameter section (10), and the same diameter section (11) is located at the opposite end of the trigger wheel (521).

4. The elevator strong drive traction machine according to claim 3, characterized in that: The expanded diameter section (10) of the trigger wheel (521) gradually expands its outer diameter along the circumferential direction from one end of the same diameter section (11), and the expanded diameter section (10) extends to the center of the opposite side of the trigger wheel (521), and the outer diameter reaches a maximum value. When the displacement of the wire rope exceeds the limit, the contact area between the expanded diameter section (10) and the wire rope gradually increases, and the clamping force increases linearly.

5. The elevator strong drive traction machine according to claim 4, characterized in that: The upper and lower diameter expansion sections (10) of the trigger wheel (521) are symmetrically arranged.

6. The elevator strong drive traction machine according to claim 1, characterized in that: The braking system (3) and the self-locking mechanism (5) are linked via a controller, and when the braking system (3) brakes, the two trigger wheels (521) move towards each other and come into contact with the steel wire rope.

7. The elevator strong drive traction machine according to claim 2, characterized in that: The sliders (5112) at both ends of the rotating shaft (12) are fixedly connected via a connecting rod (14); the driving part (512) is an electric push rod, and the telescopic shaft of the electric push rod is connected to the connecting rod (14).

8. The elevator strong drive traction machine according to claim 1, characterized in that: The outer wall of the trigger wheel (521) is provided with an anti-slip layer.

9. The elevator strong drive traction machine according to claim 1, characterized in that: The trigger wheel (521) is reset and rotated by a reset assembly (15), which comprises a guide plate (151), a guide groove (152) and a guide wheel (153). The guide plate (151) is fixedly sleeved on the outside of the rotating shaft (12) and are concentric with each other. The guide groove (152) is formed in the plate body of the guide plate (151) and extends in the opposite direction of movement of the trigger wheel (521), forming an isosceles triangle with a tip in the shape of an arc. The guide wheel (153) is connected to the mounting plate (8) via a guide rod (16) and is arranged opposite to the tip of the guide groove (152).

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