Elevator traction machine with self-detection function

Abstract

The elevator traction machine with the self-detection function comprises a main machine body, the lower end of the main machine body communicates with an elevator shaft, a heat dissipation plate is fixedly arranged in the main machine body, a brake cavity with a downward opening is formed in the heat dissipation plate, the brake cavity communicates with the elevator shaft, and a power rotating shaft is rotationally arranged between the front wall and the rear wall in the brake cavity; according to the emergency stop device for the elevator, in an emergency situation, the brake cavity moves, penetrates through the power cable and moves into the clamping groove to be clamped, then movement of the power cable is further stopped, the emergency stop effect is achieved, and then the safety of elevator passengers is protected; air flow in the ventilation cavity is promoted, so that temperature reduction of the inner wall of the ventilation cavity is promoted, the heat dissipation effect is achieved, when the load of the power cable is too large, the heat dissipation effect of brake wheel operation is improved, and then the elevator traction machine is accelerated to be cooled to the operation temperature and then continues to be put into use.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator traction machines, in particular to an elevator traction machine with a self-detection function. Background Art

[0002] The elevator traction machine is the power equipment of the elevator. It makes the elevator run by conveying and transmitting power. As an important part of the normal operation of the elevator, the elevator traction machine needs to be inspected regularly to ensure safe operation. Some elevator traction machines will detect the running speed of the traction machine during operation and ensure the safe use of the elevator through real-time monitoring. However, if the load of the elevator is too large, the elevator traction machine will generate a lot of heat energy when in use, which will affect the normal use of the elevator traction machine. It is often necessary to wait for the elevator traction machine to cool to the operating temperature before it can continue to be put into use. In addition, the general elevator traction machine detector cannot play a safety protection measure when detecting the operating data of the elevator in real time. Summary of the invention

[0003] The object of the present invention is to provide an elevator traction machine with a self-detection function to overcome the above-mentioned defects in the prior art.

[0004] According to the present invention, an elevator traction machine with a self-detection function comprises a main body, wherein the lower end of the main body is connected to an elevator shaft, a heat sink is fixedly provided in the main body, a brake chamber with an opening downward is provided in the heat sink, the brake chamber is connected to the elevator shaft, a power shaft is rotatably provided between the front and rear walls in the brake chamber, a brake wheel is fixedly connected to the outer circumference of the power shaft, a power cable is wound around the outer circumference of the brake wheel, the power cable extends outward and is connected to the elevator platform, a driven chamber is connected to the upper wall of the brake chamber, a transmission shaft is rotatably provided in the driven chamber, a driven wheel is fixedly connected to the outer circumference of the transmission shaft, the lower side of the outer circumference of the driven wheel extends into the brake chamber and abuts against the surface of the power cable, the outer circumference of the driven wheel is rough, the left and right walls of the brake chamber are connected to ejection chambers symmetrical on both sides, a movable card plate that can move left and right is provided in the ejection chamber, the end face of the movable card plate close to the brake chamber is pointed, the left and right side walls of the brake chamber are provided with ventilation chambers opening outward, the ventilation chambers on the left and right sides and located at the main body A fan chamber is connected inside the fan chamber, a rotating fan is rotatably arranged in the fan chamber, a telescopic slide is connected inside the front wall of the brake chamber, a movable slider that can move forward and backward is arranged in the telescopic slide, a movable card slot with an opening forward is arranged in the front end of the brake wheel, and the movable slider can move into the movable card slot and be clamped, the front wall of the ventilation chamber is connected with an air outlet chamber, the front wall of the air outlet chamber is connected with a closed chamber with an opening outward, a closing plate that can be flipped is arranged in the closed chamber, a clamping plate is fixedly arranged between the front and rear walls in the brake chamber, and symmetrical clamping grooves with openings outward are arranged on the left and right end surfaces of the clamping plate, and fixed plates symmetrical on both sides are fixedly arranged between the front and rear walls in the elevator shaft, the left and right ends of the power cable respectively pass through the fixed plates on both sides and are slidably connected with the fixed plates, a load detector is fixedly arranged at the abutment position between the power cable and the fixed plate for measuring the load borne by the power cable, and the specific settings of the mobile card plate, the fixed plate, the driven wheel and the clamping plate are indispensable technical features for the technical problems solved by the present application.

[0005] Preferably, a fan protection cover is fixedly provided at the connection point between the fan cavity and the ventilation cavity, a rotating shaft is fixedly connected to one end of the rotating fan, a rotating motor is fixedly provided in one side wall of the fan cavity, the rotating shaft is dynamically connected to the rotating motor, and a ventilation duct opening outward is provided in one side wall of the fan cavity.

[0006] Preferably, a centrifugal chamber is provided in one side wall of the rotating motor, a centrifugal wheel is rotatably provided in the centrifugal chamber, the axial power of the centrifugal wheel is connected to the rotating motor, a clutch slide groove opening outward is arranged in a ring shape in the centrifugal wheel, a movable clutch slider is provided in the clutch slide groove, a clutch spring is fixedly connected between the clutch slider and one side wall of the clutch slide groove, a switching plate that can move up and down is provided in the centrifugal chamber and below the centrifugal wheel, a switching spring is fixedly connected between the lower end surface of the switching plate and the lower wall of the centrifugal chamber, and a switching pull rope is fixedly connected to the end surface of the switching plate.

[0007] The movable card plate is fixedly connected to a movable piston on the end face of a side away from the brake chamber, a booster is fixedly provided in the right wall of the ejection chamber, a connecting pipe is provided between the booster and the ejection chamber, a lifting chamber is provided in the upper wall of the ejection chamber, an abutment plate which can move up and down is provided in the lifting chamber, the lower end face of the abutment plate extends downward into the ejection chamber and is clamped with the movable piston, a lifting spring is fixedly connected between the upper end face of the abutment plate and the upper wall of the lifting chamber, and a lifting rope is fixedly connected to the upper wall of the abutment plate.

[0008] Preferably, a telescopic spring is fixedly connected between the front end surface of the movable slider and the front wall of the telescopic slide groove, the movable slider is magnetic, an electromagnet is fixedly provided on the front wall of the telescopic slide groove, a telescopic pull rope is fixedly connected to the front end surface of the movable slider, and the telescopic pull rope is connected to the lifting pull rope.

[0009] Preferably, a power motor is fixedly provided in one side wall of the brake chamber, one end of the power shaft is dynamically connected to the power motor, a speed detector is fixedly provided in one side wall of the driven chamber, and one end of the transmission shaft is connected to the speed detector.

[0010] Selectedly, a supporting shaft is rotatably provided between the two walls of the closed cavity, the outer cylindrical surface of the supporting shaft is fixedly connected to the upper end of the closed plate, a driven rotating cavity is provided in one side wall of the closed cavity, one end of the supporting shaft extends into the driven rotating cavity and is fixedly connected to a driven line wheel, a driven pull rope is fixedly connected to the outer cylindrical surface of the driven line wheel, a connecting torsion spring is fixedly connected between one side wall of the driven line wheel and one side wall of the driven rotating cavity, and the driven pull rope is connected to the switching pull rope.

[0011] The beneficial effects of the present invention are:

[0012] 1. The present invention detects the rotation speed of the transmission shaft by a rotation speed detector, and then compares it with the rotation speed of the power motor to determine whether the power cable is broken;

[0013] 2. In an emergency, the present invention moves through the brake chamber and penetrates the power cable and moves to the clamping groove for clamping, thereby further preventing the movement of the power cable, achieving an emergency stop effect, and thus protecting the safety of elevator passengers;

[0014] 3. The present invention achieves the effect of heat dissipation by promoting air flow in the ventilation cavity, thereby promoting the reduction of the temperature of the inner wall of the ventilation cavity, thereby improving the heat dissipation effect of the brake wheel operation when the power cable load is too large, thereby accelerating the elevator traction machine to cool to the operating temperature before it can continue to be put into use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall structure of an elevator traction machine with a self-detection function according to the present invention;

[0017] Figure 3 The present invention Figure 2 Schematic diagram of AA in the middle;

[0018] Figure 4 The present invention Figure 2 Schematic diagram of the middle BB;

[0019] Figure 5 The present invention Figure 4 Schematic diagram of CC;

[0020] Figure 6 The present invention Figure 2 A partial enlarged schematic diagram of the centrifugal wheel component;

[0021] Figure 7 The present invention Figure 2 A partial enlarged schematic diagram of the moving card plate component;

[0022] Figure 8 The present invention Figure 3 A partial enlarged schematic diagram of the moving slider component.

[0023] In the figure:

[0024] 11. Main body; 12. Heat sink; 13. Ventilation cavity; 14. Fan protection cover; 15. Ventilation duct; 16. Rotating fan; 17. Centrifugal wheel; 18. Rotating motor; 19. Rotating shaft; 20. Fan cavity; 21. Moving card plate; 22. Fixed plate; 23. Load detector; 24. Card slot; 25. Power cable; 26. Card plate; 27. Elevator shaft; 28. Ejection cavity; 29. ​​Connecting pipe; 30. Supercharger; 31. Power shaft; 32. Brake wheel; 33. Brake cavity; 34. Driven wheel; 35. Transmission shaft; 36. Driven cavity; 37. Speed ​​detector; 38. Power motor; 39, moving slider; 40, air outlet chamber; 41, closed chamber; 42, closed plate; 43, supporting shaft; 44, driven pulley; 45, driven rotating chamber; 46, connecting torsion spring; 47, moving card slot; 48, driven pull rope; 49, clutch spring; 50, centrifugal chamber; 51, clutch slider; 52, clutch slide; 53, switching plate; 54, switching spring; 55, switching pull rope; 56, abutment plate; 57, lifting spring; 58, lifting pull rope; 59, lifting chamber; 60, moving piston; 61, telescopic spring; 62, telescopic pull rope; 63, electromagnet; 64, telescopic slide. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention:

[0026] Refer to the attached Figure 1-Figure 8According to an embodiment of the present invention, an elevator traction machine with a self-detection function includes a main body 11, the lower end of the main body 11 is connected to an elevator shaft 27, a heat sink 12 is fixedly provided in the main body 11, a brake chamber 33 with a downward opening is provided in the heat sink 12, the brake chamber 33 is connected to the elevator shaft 27, a power shaft 31 is rotatably provided between the front and rear walls of the brake chamber 33, a brake wheel 32 is fixedly connected to the outer circumference of the power shaft 31, a power cable 25 is wound around the outer circumference of the brake wheel 32, the power cable 25 extends outward and is connected to the elevator platform, and the upper wall of the brake chamber 33 is connected to a brake shaft 31 extending from the upper wall of the brake chamber 33. The driven cavity 36 has a transmission shaft 35 rotatably arranged in the driven cavity 36, and a driven wheel 34 is fixedly connected to the outer circumference of the transmission shaft 35. The lower side of the outer circumference of the driven wheel 34 extends into the brake cavity 33 and abuts against the surface of the power cable 25. The outer circumference of the driven wheel 34 is rough. The left and right walls of the brake cavity 33 are connected to each other with ejection cavities 28 symmetrical on both sides. A movable card plate 21 capable of moving left and right is arranged in the ejection cavity 28, and the end face of the movable card plate 21 close to the brake cavity 33 is pointed. The left and right side walls of the brake cavity 33 are provided with ventilation cavities 13 opening outward, and the ventilation cavities 13 are located on the left and right sides of the main A fan chamber 20 is connected in the machine body 11, and a rotating fan 16 is rotatably arranged in the fan chamber 20. A telescopic slide 64 is connected in the front wall of the brake chamber 33, and a movable slider 39 that can move forward and backward is arranged in the telescopic slide 64. A movable card slot 47 opening forward is arranged in the front end of the brake wheel 32, and the movable slider 39 can move into the movable card slot 47 and be engaged. An air outlet chamber 40 is connected in the front wall of the ventilation chamber 13, and a closed chamber 41 opening outward is connected in the front wall of the air outlet chamber 40, and a flippable closed plate 42 is arranged in the closed chamber 41. A card engaging plate is fixedly arranged between the front and rear walls of the brake chamber 33. Plate 26, symmetrical and outward-opening clamping grooves 24 are provided on the left and right end faces of the clamping plate 26, and symmetrical fixing plates 22 are fixedly provided between the front and rear walls in the elevator shaft 27. The left and right ends of the power cable 25 respectively pass through the fixing plates 22 on both sides and are slidably connected with the fixing plates 22. A load detector 23 is fixedly provided at the abutment position between the power cable 25 and the fixing plate 22 for measuring the load borne by the power cable 25. The specific settings of the mobile clamping plate 21, the fixing plate 22, the driven wheel 34 and the clamping plate 26 are indispensable technical features for the technical problems solved by the present application.

[0027] Among them, a fan protection cover 14 is fixedly provided at the connection point between the fan cavity 20 and the ventilation cavity 13, a rotating shaft 19 is fixedly connected to one end of the rotating fan 16, a rotating motor 18 is fixedly provided in a side wall of the fan cavity 20, and the rotating shaft 19 is dynamically connected to the rotating motor 18. A ventilation duct 15 opening outward is provided in one side wall of the fan cavity 20. When the rotating motor 18 is started, it can drive the rotating shaft 19 to rotate, thereby driving the rotating fan 16 to rotate, and then inputting air into the ventilation cavity 13 through the ventilation duct 15.

[0028] A centrifugal chamber 50 is provided in one side wall of the rotating motor 18, a centrifugal wheel 17 is rotatably provided in the centrifugal chamber 50, the axial power of the centrifugal wheel 17 is connected to the rotating motor 18, a clutch slide 52 with an opening facing outward is arranged in an annular manner in the centrifugal wheel 17, a movable clutch slider 51 is provided in the clutch slide 52, a clutch spring 49 is fixedly connected between the clutch slider 51 and a side wall of the clutch slide 52, a switching plate 53 that can move up and down is provided in the centrifugal chamber 50 and below the centrifugal wheel 17, a switching spring 54 is fixedly connected between the lower end surface of the switching plate 53 and the lower wall of the centrifugal chamber 50, and a switching pull rope 55 is fixedly connected to the end surface of the switching plate 53. When the rotating motor 18 is started, the centrifugal wheel 17 can be driven to rotate, thereby increasing the centrifugal force on the clutch slider 51. At this time, the clutch slider 51 overcomes the elastic force of the clutch spring 49 and moves outward, thereby pushing the switching plate 53 to overcome the elastic force of the switching spring 54 and move.

[0029] Among them, the end face of the movable card plate 21 away from the brake chamber 33 is fixedly connected with a movable piston 60, a booster 30 is fixedly provided in the right wall of the ejection chamber 28, a connecting pipe 29 is provided between the booster 30 and the ejection chamber 28, a lifting chamber 59 is connected to the upper wall of the ejection chamber 28, a contact plate 56 that can move up and down is provided in the lifting chamber 59, the lower end face of the contact plate 56 extends downward into the ejection chamber 28 and is clamped with the movable piston 60, a lifting spring 57 is fixedly connected between the upper end face of the contact plate 56 and the upper wall of the lifting chamber 59, and a lifting rope 58 is fixedly connected to the upper wall of the contact plate 56.

[0030] Among them, a telescopic spring 61 is fixedly connected between the front end surface of the movable slider 39 and the front wall of the telescopic slide groove 64, the movable slider 39 is magnetic, and an electromagnet 63 is fixedly provided on the front wall of the telescopic slide groove 64. A telescopic pull rope 62 is fixedly connected to the front end surface of the movable slider 39, and the telescopic pull rope 62 is connected to the lifting pull rope 58. The electromagnet 63 is magnetic when started, and then the movable slider 39 is pushed by the magnetic force to overcome the elastic force of the telescopic spring 61 and move, and at the same time, the telescopic pull rope 62 is pulled to move.

[0031] A power motor 38 is fixedly provided in one side wall of the brake chamber 33 , one end of the power shaft 31 is connected to the power motor 38 , a speed detector 37 is fixedly provided in one side wall of the driven chamber 36 , and one end of the transmission shaft 35 is connected to the speed detector 37 .

[0032] Among them, a supporting shaft 43 is rotatably provided between the two walls of the closed cavity 41, and the outer cylindrical surface of the supporting shaft 43 is fixedly connected to the upper end of the closed plate 42. A driven rotating cavity 45 is provided in one side wall of the closed cavity 41. One end of the supporting shaft 43 extends into the driven rotating cavity 45 and is fixedly connected to a driven line wheel 44. A driven pull rope 48 is fixedly connected to the outer cylindrical surface of the driven line wheel 44. A connecting torsion spring 46 is fixedly connected between one side wall of the driven line wheel 44 and one side wall of the driven rotating cavity 45, and the driven pull rope 48 is connected to the switching pull rope 55.

[0033] The elevator traction machine with a self-detection function of the present invention has the following working process:

[0034] During operation, after the main body 11 is fixed and put into use, the supercharger 30 is started and air is input through the connecting pipe 29, and the air pressure strength on one side of the moving piston 60 is increased. At this time, the power motor 38 is started and drives the power shaft 31 to rotate, thereby driving the driven wheel 34 to rotate, and then completing the basic elevator operation through the power cable 25. In this process, the driven wheel 34 contacts and resists the surface of the power cable 25, and drives the driven wheel 34 to rotate during the movement of the power cable 25, and then outputs power through the transmission shaft 35, and detects the speed of the transmission shaft 35 through the speed detector 37, and then compares it with the speed of the power motor 38 to determine whether the power cable 25 breaks. If the instantaneous speed difference is large, the power motor 38 stops urgently, and the electromagnet 63 starts When the elevator wheel 32 is in motion, it has magnetism, and then the moving slider 39 is pushed by the magnetic force to overcome the elastic force of the telescopic spring 61 to move, and at the same time, the telescopic pull rope 62 is pulled to move. At this time, the moving slider 39 moves into the moving card slot 47 and is engaged, thereby preventing the brake wheel 32 from rotating. At this time, the telescopic pull rope 62 moves and pulls the lifting pull rope 58 to move upward. At this time, the lifting pull rope 58 moves and pulls the abutment plate 56 to overcome the elastic force of the lifting spring 57 and move upward, thereby driving the abutment plate 56 to enter the lifting chamber 59. At this time, the abutment plate 56 and the moving piston 60 are no longer engaged. At this time, the moving piston 60 is pushed by the air pressure and quickly moves into the brake chamber 33, and passes through the power cable 25 and moves to the card slot 24 for engagement, thereby further preventing the movement of the power cable 25, achieving the effect of emergency stop, thereby protecting the safety of the elevator passengers.

[0035] During the normal operation of the elevator, the load detector 23 contacts the power cable 25 to test the load quality of the power cable 25. If the load of the power cable 25 is too large, the rotating motor 18 can drive the rotating shaft 19 to rotate when it is started, thereby driving the rotating fan 16 to rotate, and then inputting air into the ventilation chamber 13 through the ventilation duct 15. At the same time, the rotating motor 18 can drive the centrifugal wheel 17 to rotate when it is started, thereby increasing the centrifugal force on the clutch slider 51. At this time, the clutch slider 51 overcomes the elastic force of the clutch spring 49 and moves outward, thereby pushing the switching plate 5 3 overcomes the elastic force of the switching spring 54 and moves. At this time, the connection between the switching rope 55 and the driven rope 48 is loosened. At this time, the driven line wheel 44 rotates under the torsional elastic force of the connecting torsion spring 46, thereby driving the support shaft 43 to rotate, thereby driving the closing plate 42 to flip so that the closed cavity 41 is connected with the outside, thereby allowing the air in the ventilation cavity 13 to flow, thereby promoting the temperature of the inner wall of the ventilation cavity 13 to reduce to achieve the effect of heat dissipation, thereby making the power cable 25 overloaded, improving the heat dissipation effect of the brake wheel 32, thereby accelerating the elevator traction machine to cool to the operating temperature and continue to be put into use.

[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator traction machine with a self-detection function, comprising a main body (11), characterized in that: The lower end of the main body (11) is connected to the elevator shaft (27), a heat sink (12) is fixedly provided in the main body (11), a brake chamber (33) with a downward opening is provided in the heat sink (12), the brake chamber (33) is connected to the elevator shaft (27), a power shaft (31) is rotatably provided between the front and rear walls in the brake chamber (33), a brake wheel (32) is fixedly connected to the outer circumference of the power shaft (31), a power cable (25) is wound around the outer circumference of the brake wheel (32), and the power cable (25) is outwardly extended. The brake chamber (33) is connected to the elevator platform, and the upper wall of the brake chamber (33) is connected to a driven chamber (36). A transmission shaft (35) is rotatably arranged in the driven chamber (36). The outer circumferential surface of the transmission shaft (35) is fixedly connected to a driven wheel (34). The lower side of the outer circumferential surface of the driven wheel (34) extends into the brake chamber (33) and abuts against the surface of the power cable (25). The left and right walls of the brake chamber (33) are connected to ejection chambers (28) symmetrical on both sides. A movable card plate (21) capable of moving left and right is arranged in the ejection chamber (28); The left and right side walls of the brake chamber (33) are provided with ventilation chambers (13) opening outwards, the left and right sides of the ventilation chamber (13) and located in the main body (11) are connected with fan chambers (20), a rotating fan (16) is rotatably arranged in the fan chamber (20), a telescopic slide groove (64) is connected in the front wall of the brake chamber (33), a movable slider (39) that can move forward and backward is arranged in the telescopic slide groove (64), a movable card groove (47) opening forwards is arranged in the front end of the brake wheel (32), an air outlet chamber (40) is connected in the front wall of the ventilation chamber (13), a closed chamber (41) opening outwards is connected in the front wall of the air outlet chamber (40), a closed chamber (41) opening outwards is arranged in the front wall of the closed chamber (41), a closed plate (42) that can be turned over is arranged in the closed chamber (41), and the brake chamber (33) A clamping plate (26) is fixedly provided between the front and rear walls, and the left and right end surfaces of the clamping plate (26) are provided with symmetrical clamping grooves (24) opening outward. A fixed plate (22) symmetrical on both sides is fixedly provided between the front and rear walls of the elevator shaft (27). The left and right ends of the power cable (25) respectively pass through the fixed plates (22) on both sides and are slidably connected with the fixed plates (22). A load detector (23) is fixedly provided at the abutment position between the power cable (25) and the fixed plate (22) for measuring the load borne by the power cable (25). The specific arrangement of the movable clamping plate (21), the fixed plate (22), the driven wheel (34) and the clamping plate (26) is an indispensable technical feature for the technical problem solved by the present application.

2. The elevator traction machine with self-detection function according to claim 1, characterized in that: A fan protection cover (14) is fixedly provided at the connection point between the fan cavity (20) and the ventilation cavity (13); one end of the rotating fan (16) is fixedly connected to a rotating shaft (19); a rotating motor (18) is fixedly provided in a side wall of the fan cavity (20); the rotating shaft (19) is motively connected to the rotating motor (18); and a ventilation duct (15) opening outward is provided in communication with a side wall of the fan cavity (20).

3. The elevator traction machine with self-detection function according to claim 2, characterized in that: A centrifugal chamber (50) is provided in one side wall of the rotating motor (18), a centrifugal wheel (17) is rotatably provided in the centrifugal chamber (50), the axial power of the centrifugal wheel (17) is connected to the rotating motor (18), a clutch slide groove (52) with an opening facing outward is arranged in an annular manner in the centrifugal wheel (17), a movable clutch slider (51) is provided in the clutch slide groove (52), a clutch spring (49) is fixedly connected between the clutch slider (51) and a side wall of the clutch slide groove (52), a switching plate (53) that can move up and down is provided in the centrifugal chamber (50) and below the centrifugal wheel (17), a switching spring (54) is fixedly connected between the lower end surface of the switching plate (53) and the lower wall of the centrifugal chamber (50), and a switching pull rope (55) is fixedly connected to the end surface of the switching plate (53).

4. The elevator traction machine with self-detection function according to claim 1, characterized in that: A movable piston (60) is fixedly connected to the end face of the movable card plate (21) away from the brake chamber (33); a booster (30) is fixedly provided in the right wall of the ejection chamber (28); a connecting pipe (29) is provided between the booster (30) and the ejection chamber (28); a lifting chamber (59) is provided in the upper wall of the ejection chamber (28); a contact plate (56) capable of moving up and down is provided in the lifting chamber (59); a lower end face of the contact plate (56) extends downward into the ejection chamber (28) and is engaged with the movable piston (60); a lifting spring (57) is fixedly connected between the upper end face of the contact plate (56) and the upper wall of the lifting chamber (59); a lifting rope (58) is fixedly connected to the upper wall of the contact plate (56).

5. The elevator traction machine with self-detection function according to claim 4, characterized in that: A telescopic spring (61) is fixedly connected between the front end surface of the movable slider (39) and the front wall of the telescopic slide groove (64); an electromagnet (63) is fixedly provided on the front wall of the telescopic slide groove (64); a telescopic pull rope (62) is fixedly connected to the front end surface of the movable slider (39); and the telescopic pull rope (62) is connected to the lifting pull rope (58).

6. The elevator traction machine with self-detection function according to claim 1, characterized in that: A power motor (38) is fixedly provided in one side wall of the brake chamber (33), one end of the power shaft (31) is connected to the power motor (38), a speed detector (37) is fixedly provided in one side wall of the driven chamber (36), and one end of the transmission shaft (35) is connected to the speed detector (37).

7. The elevator traction machine with self-detection function according to claim 3, characterized in that: A supporting shaft (43) is rotatably provided between the two walls of the closed cavity (41), the outer circumferential surface of the supporting shaft (43) is fixedly connected to the upper end of the closed plate (42), a driven rotating cavity (45) is provided in one side wall of the closed cavity (41), one end of the supporting shaft (43) extends into the driven rotating cavity (45) and is fixedly connected to a driven line wheel (44), the outer circumferential surface of the driven line wheel (44) is fixedly connected to a driven pull rope (48), a connecting torsion spring (46) is fixedly connected between one side wall of the driven line wheel (44) and one side wall of the driven rotating cavity (45), and the driven pull rope (48) is connected to the switching pull rope (55).

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