A strong drive traction machine for elevator

Abstract

The present invention discloses an elevator strong drive traction machine, which relates to the technical field of traction machines and includes a driving device, a traction wheel and a braking system. The driving device is an electric motor, whose output shaft is connected to the traction wheel through a planetary reducer. The electric motor is installed on a double-layer base frame, which includes a top plate, a support column and a reinforcement column. The top plate is provided with a clearance groove for the wire rope to pass through from top to bottom, and also 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 present invention improves the problem that the long-term friction between the traction wheel and the wire rope in the prior art may cause slippage between the traction wheel and the wire rope, thereby affecting the braking effect. The present invention has the advantage of providing a self-locking structure so that after the traction wheel brakes, when the wire rope continues to fall due to slipping, the wire rope can be subjected to emergency locking braking to avoid safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of traction machines, and in particular to a strong-drive traction machine for an elevator. Background Art

[0002] The traction machine is the power equipment of the elevator, which consists of an electric motor, brake, coupling, reduction gear, traction wheel, frame and guide wheel, and an auxiliary handwheel. In order to cope with the requirements of large loads and high speeds, the driving force is generally improved through the design of high torque output and multi-rope friction transmission.

[0003] In the existing technology, when the traction machine is working, its core principle is to drive the car up and down through the friction between the traction sheave and the wire rope. Therefore, the long-term friction between the traction sheave and the wire rope is an inevitable mechanical contact process. However, long-term continuous friction will cause slippage between the traction sheave and the wire rope, which not only affects the operating efficiency of the elevator, but may also 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] In response to the above technical problems, the present invention discloses an elevator strong-drive traction machine. The present invention has the advantages of being provided with a self-locking structure, so that when the wire rope continues to fall due to slipping after the traction wheel brakes, the wire rope can be emergency locked and braked, thereby avoiding safety hazards. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide an elevator strong drive traction machine to solve the technical problems in the existing technology such as long-term friction between the traction wheel and the wire rope causing slippage between the traction wheel and the wire rope, thereby affecting the braking effect. The present invention has the advantage of providing a self-locking structure so that after the traction wheel brakes, when the wire rope continues to fall due to slippage, the wire rope can be emergency locked and braked to avoid safety hazards.

[0006] The present invention is achieved through the following technical solutions: The present invention discloses an elevator strong drive traction machine, including a driving device, a traction sheave, and a braking system. The driving device is an electric motor, whose output shaft is connected to the traction sheave via a planetary reducer. The electric motor is mounted on a double-layer base frame, which includes a top plate, a support column, and a reinforcement column. The top plate is provided with a clearance groove for the wire rope to pass through from top to bottom, and also includes a self-locking mechanism, which is arranged below the traction sheave and on the reinforcement column.

[0007] 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. The clamping component locks the wire rope when the wire rope moves abnormally. The self-locking mechanism and the traction machine braking system form a double brake.

[0008] The moving assembly includes a slide rail and a driving part. The slide rail is composed of a rail and a slider. The slider is connected to the clamping assembly.

[0009] The clamping assembly includes two symmetrically arranged trigger wheels, which are controlled to move toward and away from each other through a moving assembly.

[0010] 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 uniform diameter section and an expanded diameter section along the circumference.

[0011] Furthermore, the outer diameter of the same diameter section is smaller than that of the expanded diameter section, and the same diameter section is located at the end facing the trigger wheel.

[0012] Furthermore, the outer diameter of the expanded section of the trigger wheel gradually expands from one end of the same diameter section along the circumferential direction, and the expanded section extends to the center of the back side of the trigger wheel, and the outer diameter reaches the maximum value. When the displacement of the wire rope exceeds the limit, the contact area between the expanded section and the wire rope gradually increases, and the clamping force increases linearly.

[0013] Furthermore, the upper and lower diameter expansion sections of the trigger wheel are symmetrically arranged.

[0014] Furthermore, the braking system is linked to the self-locking mechanism through a controller. When the braking system brakes, the two trigger wheels move toward each other and contact the wire rope.

[0015] Furthermore, the sliders at both ends of the rotating shaft are fixedly connected by 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.

[0016] Furthermore, an anti-slip layer is provided on the outer wall of the trigger wheel.

[0017] Furthermore, the trigger wheel is reset and rotated by a reset assembly, which includes a guide plate, a guide groove and a guide wheel. The guide plate is fixedly sleeved on the outside of the rotating shaft and is concentric with each other. The guide groove is opened on the plate body of the guide plate and extends along the opposite movement direction of the trigger wheel, forming an isosceles triangle with a circular arc 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.

[0018] The present invention has the following advantages:

[0019] (1) The present invention provides a self-locking mechanism, so that when the wire rope continues to fall due to slipping after the traction wheel brakes, the wire rope can be emergency locked and braked to avoid safety hazards. The self-locking mechanism is set to be triggered under dual conditions, so that the clamping assembly will lock the wire rope only when necessary, that is, when the traction wheel brakes and the wire rope brake fails, thereby reducing the wear of the self-locking mechanism.

[0020] (2) The present invention provides a trigger wheel, and provides a same-diameter section and an expanded-diameter section on the trigger wheel along the circumferential direction, and matches the length of the same-diameter section with the normal displacement of the wire rope, so that in the initial state, the trigger wheel and the wire rope are in low-friction contact. After the traction wheel stops rotating, when the wire rope is slightly displaced due to inertia, the same-diameter section of the trigger wheel contacts and does not generate a clamping force, thereby avoiding triggering the clamping action every time braking, resulting in unnecessary contact between the trigger wheel and the wire rope and accelerated wear. By providing the expanded-diameter section, the wire rope drives the trigger wheel into the expanded-diameter section, and then gradually increases the outer diameter of the gradually expanding section, ensuring that the clamping force increases linearly with the displacement of the wire rope, thereby avoiding impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the separation of the trigger wheel and the wire rope of the present invention;

[0023] Figure 3 This is a schematic diagram of the trigger wheel and the wire rope in pre-contact according to the present invention;

[0024] Figure 4 This is a schematic diagram of the trigger wheel locking wire rope of the present invention;

[0025] Figure 5 This is a schematic diagram of the front structure of the trigger wheel of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the self-locking mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the guide plate structure of the present invention.

[0028] In the figure: 1. Driving device; 2. Traction wheel; 3. Braking system; 4. Underframe; 5. Self-locking mechanism; 6. Connecting column; 7. Giving 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 plate; 152. Guide groove; 153. Guide wheel. DETAILED DESCRIPTION

[0029] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method and specific operation process are given. However, the scope of protection of the present invention is not limited to the following embodiment. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0030] The embodiment discloses an elevator strong drive traction machine, such as Figure 1-Figure 7 As shown, it includes a driving device 1 and a traction wheel 2, and also includes a braking system 3, wherein, as shown in FIG. Figure 1 As shown, the driving device 1 is an electric motor, which is mounted on the base frame 4. The motor is started to drive the traction sheave 2 to rotate, and a steel wire rope is provided on the outside of the traction sheave 2. The traction sheave 2 is driven to rotate by the motor, and contacts with the steel wire rope to generate static friction, transmit power, and realize the lifting and lowering of the car through a cooperative mechanism of auxiliary positioning of the guide wheel. When it is necessary to stop, the traction sheave 2 is braked by the braking system 3. After the braking system 3 is started, the traction sheave 2 stops rotating and the steel wire rope stops moving. Due to the connection between the steel wire rope and the car, the car eventually stops at the target floor position.

[0031] A reducer is connected to the output shaft of the motor. In this embodiment, the reducer is set to a planetary reducer. The application of the planetary reducer allows the traction wheel 2 to obtain a larger output torque at a lower input speed, thereby improving the transmission efficiency and reducing energy loss. At the same time, it reduces the load and starting current of the motor and extends the service life of the motor. In addition, high-precision gear processing and optimized connection design reduce vibration and noise during operation, thereby improving the stability and comfort of the equipment.

[0032] In actual operation, according to the existing technology, it can be known that the long-term friction between the traction wheel 2 and the wire rope is an inevitable mechanical contact process. However, long-term continuous friction will cause the roughness of the contact surface to decrease, thereby reducing the friction coefficient, and the traction wheel 2 will also be worn, resulting in a decrease in the contact area, and then slipping will occur between the traction wheel 2 and the wire rope. Once slipping occurs, the braking of the traction wheel 2 will fail, which may easily cause safety accidents such as the car falling out of control. Therefore, in this embodiment, a self-locking mechanism 5 is provided, so that after braking, the wire rope can be locked, thereby performing double braking to improve safety performance.

[0033] However, double braking is adopted through the self-locking mechanism 5. If the self-locking mechanism 5 and the traction machine's own braking system 3 are operated simultaneously, the self-locking mechanism 5 will also be subject to wear. Therefore, in this embodiment, the self-locking mechanism 5 is set to be conditionally triggered, that is, the self-locking mechanism 5 will be triggered to lock the wire rope only when the triggering condition is met, thereby avoiding frequent triggering and causing synchronous wear of the locking contact surface of the self-locking mechanism 5 and the traction sheave 2, and avoiding failure of the self-locking mechanism 5 due to excessive wear when the traction sheave 2 and the wire rope slip.

[0034] The triggering condition of the self-locking mechanism 5 is set as a double triggering condition. Specifically, after the traction sheave 2 is braked and the wire rope continues to move, the self-locking mechanism 5 performs a locking brake on the wire rope.

[0035] Specifically, such as Figure 1 As shown, the underframe 4 is configured as a double-layer underframe 4, including a top plate 401, pillars 402, and reinforcement pillars 403, wherein the motor is mounted on the top plate 401, and a clearance groove 7 is provided through the top plate 401 from top to bottom, so that the wire rope on the traction wheel 2 can pass through the clearance groove 7 and connect to the car, and pillars 402 are fixedly provided at the bottom around the top plate 401, and the bottom sections of the four pillars 402 are reinforced and connected by four reinforcement pillars 403 respectively, and a connecting pillar 6 is fixedly connected between the two reinforcement pillars 403 on both sides, and there is space on both the front and rear sides of the connecting pillar 6 to make way for the wire rope, and the self-locking mechanism 5 is connected to the connecting pillar 6 and the reinforcement pillar 403.

[0036] like Figure 1 and Figure 6 As shown, the self-locking mechanism 5 includes a moving component 501 and a clamping component 502. A mounting plate 8 is fixedly connected to the reinforcement column 403 and the connecting column 6, and the mounting plate 8 is located in the makeshift space at the rear end of the connecting column 6, that is, the self-locking mechanism 5 only brakes the wire rope on one side. A through groove 9 is opened on the mounting plate 8 from top to bottom to make way for the wire rope so that the wire rope can pass through the mounting plate 8. The moving component 501 is installed on the mounting plate 8 to control the clamping component 502 to clamp and lock the wire rope, thereby braking the 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 wire rope. It should be noted that the sequence is set to be that 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 wire rope, and when the wire rope continues to move, the clamping component 502 performs a clamping operation to brake the wire rope.

[0037] It should also be noted that when the brake is not applied, that is, when the traction machine is operating normally, the clamping surface of the clamping assembly 502 is spaced apart from the wire rope, thereby preventing the wire rope from wearing the clamping surface during normal operation and causing brake failure.

[0038] Therefore, through the above-mentioned dual-condition triggering, the clamping assembly 502 will only lock the wire rope when it is necessary, that is, after the traction sheave 2 is braked and the wire rope brake fails, thereby reducing the wear of the self-locking mechanism 5. Compared with the single-condition triggering through the traction sheave 2 braking, it is avoided that the two trigger wheels 521 need to clamp the wire rope once every time braking, regardless of whether the traction sheave 2 brake fails. Under the single-condition triggering condition, the same pressure is applied every time braking, which will cause the surface of the wire rope to be compressed and produce indentations. In the long run, the damage to the wire rope will accumulate, resulting in a shortened service life of the wire rope. The dual-condition triggering condition is only triggered when necessary, reducing unnecessary wear and reducing the clamping damage to the wire rope.

[0039] Compared with the single-condition triggering by the movement of the wire rope, the clamping component 502 needs to be in contact with the wire rope in the initial state. During the long-term normal operation of the wire rope, the wire rope will cause wear on the clamping surface of the clamping component 502, thereby affecting the subsequent emergency braking effect. Therefore, the dual-condition triggering has higher safety.

[0040] Specifically, such as Figure 1 and Figure 6 As shown, the moving component 501 includes a slide rail 511 and a drive unit 512, wherein the slide rail 511 is used to limit the horizontal movement of the clamping component 502, so that the horizontal movement accuracy of the clamping component 502 is higher, and the drive unit 512 is used to drive the movement of the clamping component 502. In this embodiment, the drive unit 512 is mainly used to make the clamping component 502 move horizontally, and it can be achieved in many ways in the prior art. For example, the drive unit 512 can be set to an electric push rod, and the telescopic shaft is extended and retracted by starting the electric push rod, thereby controlling the horizontal movement of the clamping component 502. The drive unit 512 can also be set to a screw control, and the clamping component 502 is driven by the screw. In addition, in other embodiments, it can also be set to be controlled by a braking technology similar to the traction machine. When the elevator stops, the brake coil is powered off, and the clamping component 502 is moved horizontally by relying on the spring force, thereby achieving the clamping of the horizontal movement of the clamping component 502.

[0041] It should be noted that, regardless of the driving mode, the horizontal movement of the clamping assembly 502 is started after the traction wheel 2 is braked. For example, when the drive 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 is braked, the electric push rod is started, so that after the traction machine brakes the traction wheel 2, the electric push rod is started, causing the clamping assembly 502 to move horizontally, thereby causing the clamping surface to contact the wire rope.

[0042] See Figure 6 The slide rail 511 includes a rail 5111 and a slider 5112 , wherein the rail 5111 is fixed on the mounting plate 8 , and the slider 5112 is slidably set on the rail 5111 .

[0043] The clamping assembly 502 includes two symmetrically arranged trigger wheels 521 and a bearing seat 522 connected to the trigger wheels 521, wherein the two rotating shafts 12 are arranged front and back along the radial direction of the traction sheave 2 on the mounting plate 8, and the two rotating shafts 12 are rotatably arranged on the mounting plate 8 through the bearing seats 522, and sliders 5112 are fixed under the bearing seats 522 at both ends of the two rotating shafts 12, and the sliders 5112 are slidably set on the rails 5111, and the two trigger wheels 521 are fixedly sleeved on the outside of the two rotating shafts 12, and the two trigger wheels 521 are symmetrically arranged front and back, and then the cooperation of the sliders 5112 and the rails 5111 allows the two trigger wheels 521 to move horizontally along the radial direction of the traction sheave 2, so that the outer circumferential outer walls of the two trigger wheels 521 can clamp or separate the wire rope;

[0044] 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, so that the trigger wheel 521 can be moved and controlled by the electric push rod. In addition, the movement of the trigger wheel 521 is limited by the limit switch 13.

[0045] 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, the multiple strands of steel wire rope on the traction wheel 2 are all located within the clamping range of the two trigger wheels 521, and thus when the trigger wheels 521 move toward each other to clamp and brake the steel wire rope, effective braking can be achieved. In this embodiment, anti-slip grooves can be provided on the outer wall of the trigger wheel 521 to increase the friction after the trigger wheel 521 contacts the steel wire rope and improve the braking effect. An anti-slip rubber pad layer can also be provided on the outer wall of the trigger wheel 521 to achieve an anti-slip effect.

[0046] In order to enable the trigger wheel 521 to clamp the wire rope by the movement of the wire rope as a trigger condition, the trigger wheel 521 is configured to have an outer diameter that gradually expands along the circumferential direction, and the two trigger wheels 521 have a small diameter section on the side facing each other and a large diameter section on the side facing each other.

[0047] Specifically, such as Figure 5 and Figure 6 As shown, the trigger wheel 521 is divided into a same-diameter section 11 and an expanded-diameter section 10 along the circumferential direction, wherein the same-diameter section 11 starts from the vertex of the opposite side of the two trigger wheels 521 and extends along the circumference toward 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, which starts from the end of the same-diameter section 11 and the outer diameter gradually increases along the circumferential direction to form a continuous curved surface transition, 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. 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 the same-diameter section 11 and the expanded-diameter section 10.

[0048] In this embodiment, the vertex is the point where the facing surfaces of the two trigger wheels 521 are closest to each other in the circumferential direction. In other words, when the two trigger wheels 521 are cut along the horizontal center line, the trigger wheels 521 present upper and lower semicircles, with the vertex being the endpoint at one end facing each other, and the endpoint being the endpoint at the other end facing each other. The upper semicircle and the lower semicircle 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 semicircles are also symmetrically arranged.

[0049] It should be noted that, under normal conditions, after the traction wheel 2 is braked and stops rotating, due to inertia and other reasons, for example, the inertia force of the car and the load will continue to act on the wire rope, causing it to produce instantaneous displacement. Therefore, the wire rope will have a slight displacement, which is a normal phenomenon. The displacement of the wire rope is used as a trigger condition to clamp it. Therefore, under the normal displacement of the wire rope, the trigger wheel 521 will rotate accordingly. If the circumference of the trigger wheel 521 is an 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 wire rope, causing a certain clamping force on the wire rope. Each braking triggers the clamping action, resulting in triggering Unnecessary contact between the wheel 521 and the wire rope accelerates wear, and the wear will increase over time. Therefore, in this embodiment, a same-diameter section 11 is provided, and the stroke of the same-diameter section 11 matches the normal displacement of the 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 wire rope is within the same-diameter section 11. Once the wire rope enters the expanded diameter section 10, it means that the displacement of the wire rope exceeds the limit, and 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 to the same-diameter section 11, avoiding premature clamping of the trigger wheel 521, thereby reducing wear.

[0050] like Figure 4 As shown, the arrangement of the diameter expansion section 10 allows the steel wire rope to drive the trigger wheel 521 into the diameter expansion section 10, and the outer diameter of the gradually expanding section gradually increases, thereby ensuring that the clamping force increases linearly with the displacement of the steel wire rope, thereby avoiding impact.

[0051] In addition, by setting the expanding diameter section 10 to be symmetrical in the upper and lower directions, when the wire rope moves upward, it contacts the gradually expanding section of the upper trigger wheel 521, and when the wire rope moves downward, it contacts the gradually expanding section of the lower trigger wheel 521.

[0052] It should be noted that, in this embodiment, the limit switch 13 sets the limit of the slider 5112 so that when the two trigger wheels 521 move toward each other, the trigger wheel 521 moves to the outer wall and contacts the wire rope and stops after having a slight contact pressure. At this time, it is in a low friction state, such as Figure 3 As shown, when the two trigger wheels 521 move away from each other, the two trigger wheels 521 move to a distance away from the wire rope and stop, as shown in FIG. Figure 2 shown.

[0053] Furthermore, the trigger wheel 521 is rotatably connected to the bearing seat 522 so that the trigger wheel 521 can rotate freely and smoothly. When the two trigger wheels 521 move toward each other and contact the wire rope, the movement of the wire rope drives 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 wire rope according to the displacement of the wire rope.

[0054] When the car is braked each time, after the wire rope is normally displaced, the trigger wheel 521 will not have the expanded diameter section 10 in contact with the wire rope and clamp it. When the car moves again, the electric push rod is first started to make the two trigger wheels 521 move away from each other and separate from the wire rope. It should be noted that the start and retraction of the electric push rod is started before the traction sheave 2 rotates, so that before the wire rope moves, the trigger wheels 521 move away from each other and separate from the wire rope. After the trigger wheel 521 is reset, since the wire rope is normally displaced during braking, the 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 until the two trigger wheels 521 face each other, and then the same diameter section 11 can still be brought into contact with the wire rope during the next braking. Therefore, in this embodiment, by providing the reset component 15, the trigger wheel 521 can be reset and rotated each time it is reset and moved horizontally.

[0055] like Figure 1 、 Figure 6 and Figure 7 As 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 while maintaining concentricity, and the plate body of the guide plate 151 is provided with a guide groove 152 in the shape of an isosceles triangle 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 range of the same diameter section 11, when the trigger wheel 521 subsequently 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.

[0056] In other embodiments, the guide wheel 153 can be controlled to move horizontally through 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.

[0057] The principle of the present invention is as follows: when braking, the present invention first brakes the traction machine through the braking system 3. At this time, the traction wheel 2 stops. According to the normal braking process, the wire rope will stop, and the car will stop moving. After the traction wheel 2 is braked, the two trigger wheels 521 will move toward each other under the action of the electric push rod, so that the two trigger wheels 521 will move to the outer wall of the outer circumference and contact the wire rope, and have a slight contact pressure, so that the movement of the wire rope can drive the trigger wheel 521 to rotate. Under normal conditions, if the wire rope braking is effective, the wire rope may have a certain slight displacement due to inertia and other reasons. This is a normal phenomenon. In the initial state, the same diameter section 11 of the trigger wheel 521 is in contact with the wire rope, and the stroke of this same diameter section 11 is positive with the wire rope. Under normal conditions, the slight displacement stroke after braking matches each other. Within this stroke, the same-diameter section 11 of the trigger wheel 521 contacts the wire rope and is driven to rotate by the movement of the wire rope. Since the trigger wheel 521 rotates through the bearing seat 522, it will not excessively rub the outer wall of the trigger wheel 521. Once the displacement of the wire rope after braking exceeds the limit and exceeds the normal displacement, the wire rope may slip. At this time, the contact part of the trigger wheel 521 with the 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 continue to contact the wire rope, the wire rope will be gradually clamped, and then the wire rope will be locked. Moreover, the outer diameter of the gradually expanding section will gradually increase, ensuring that the clamping force increases linearly with the displacement of the wire rope to avoid impact.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

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, the output shaft of which is connected to the traction wheel (2) via a planetary reducer, the electric motor is mounted on a double-layer base frame (4), the base frame (4) comprises a top plate (401), a support column (402) and a reinforcement column (403), the top plate (401) is provided with a clearance groove (7) through the top and bottom for the wire rope to pass through, and the invention is characterized in that: It also includes a self-locking mechanism (5) disposed below the traction wheel (2) and on the reinforcement column (403); The self-locking mechanism (5) includes a moving component (501) and a clamping component (502), wherein the moving component (501) is triggered to move horizontally by the traction machine braking, and the clamping component (502) locks the wire rope when the 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 portion (512), wherein the slide rail (511) is composed of a rail bar (5111) and a slider (5112), and 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 toward and away from each other by the moving assembly (501); The trigger wheel (521) is reset and rotated by a reset assembly (15). The reset assembly (15) includes 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 is concentric with each other. The guide groove (152) is formed in the body of the guide plate (151) and extends in the opposite direction of movement of the trigger wheel (521), forming an isosceles triangle. The tip of the guide groove (152) is 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).

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 the slider (5112); and the outer wall of the trigger wheel (521) is divided into a uniform diameter section (11) and an expanded 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 expanded diameter 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. When the braking system (3) brakes, the two trigger wheels (521) move toward each other and come into contact with the 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) adopts 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.

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