An elevator limit recognition system

Abstract

The present invention proposes an elevator limit recognition system, comprising: an infrared human body sensor, a control box, a starting module, a mounting shaft, a rotary drive mechanism, a rotating arm, a support frame, a support block, and a buffer portion. The mounting shaft is hinged to one end of the rotating arm, the other end of which is connected to the support frame. A support block is disposed above the support frame and connected to the support frame via a buffer portion. The support block is configured to contact the bottom of the car. A rotary drive mechanism is connected to the rotating arm, and the rotary drive mechanism is configured to drive the support block to face or deviate from the car. An infrared human body sensor is installed in the pit of the elevator shaft and is configured to sense whether there is a person in the pit. The infrared human body sensor is connected to the control box, and the rotary drive mechanism is connected to the control box via the starting module. This elevator limit recognition system solves the problem in the prior art that the car is easily deformed and damaged when it falls onto the support frame due to the lack of a buffer in the support frame.

Description

Technical Field

[0001] The present invention relates to an elevator, and in particular to an elevator position limit identification system. Background Art

[0002] Villas and other buildings have elevators, and maintenance personnel often perform maintenance at the bottom of the elevator shaft. The elevator car is prone to suddenly falling to the bottom of the elevator shaft. In order to ensure the safety of maintenance personnel, an elevator limit recognition system is designed to support the elevator car at a certain height during the maintenance process, protecting the maintenance personnel.

[0003] In the prior art, an elevator limit identification system includes: a support frame, a rotating arm, and a mounting shaft. The mounting shaft stands at the bottom of the elevator shaft and is hinged to one end of the rotating arm. The other end of the rotating arm is fixed to the middle of the support frame. The lower end of the support frame contacts the bottom wall of the elevator shaft, and the upper end of the support frame is used to support the elevator car. Although it can achieve temporary support for the elevator car, the device still has the following disadvantages:

[0004] Since there is no buffer on the support frame, when the elevator car falls, the car suddenly hits the support frame, which can easily cause the bottom of the car to deform and be damaged. Summary of the Invention

[0005] The present invention provides an elevator limit identification system to solve the problem in the prior art that the elevator car is easily deformed and damaged when it falls onto the support frame because the support frame has no buffer.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention proposes an elevator limit recognition system, comprising: an infrared human body sensor, a control box, a starting module, a mounting shaft, a rotary drive mechanism, a rotating arm, a support frame, a support block and a buffer portion; the mounting shaft is mounted at the bottom of the elevator shaft, the mounting shaft is hinged to one end of the rotating arm, the other end of the rotating arm is connected to the support frame, a support block is provided above the support frame, the support block is connected to the support frame through the buffer portion, the support block is used to contact the bottom of the car, and is connected to the rotating arm with a rotary drive mechanism, the rotary drive mechanism is used to drive the support block to face the car or deviate from the car; an infrared human body sensor is installed at the pit in the elevator shaft, the infrared human body sensor is used to sense whether there is someone in the pit; the infrared human body sensor is connected to the control box, and the rotary drive mechanism is connected to the control box through the starting module.

[0008] Preferably, the rotary drive mechanism includes: an elastic member, a sliding block and an electromagnetic telescopic rod, the electromagnetic telescopic rod is installed next to the support frame and the mounting shaft, the output portion of the electromagnetic telescopic rod is hinged to the sliding block, the sliding block can be slidably installed on the rotating arm, and an elastic member is installed at the hinge of the mounting shaft and the rotating arm. Under the elastic force of the elastic member, the support block can be kept in a position deviating from the car, and the electromagnetic telescopic rod is used to transport the support block to the bottom of the car by pushing the rotating arm after power is turned on.

[0009] Preferably, the starting module includes: a relay, the electromagnetic telescopic rod is connected to the starting power supply via the relay, and the control end of the relay is connected to the control box.

[0010] Preferably, the buffer portion includes: a first spring, one end of the first spring is connected to the support block, the other end of the first spring is connected to the support frame, and a receiving groove is formed on the top surface of the support frame, and the receiving groove is used to receive the first spring.

[0011] Preferably, one end of the first spring is detachably connected to the support block via a first mounting assembly, and the other end of the first spring is detachably connected to the support frame via a second mounting assembly.

[0012] Preferably, the rotating arm is detachably connected to the support frame via a third mounting assembly.

[0013] Preferably, the second mounting assembly is connected to a limiting assembly, the limiting assembly extends into the position of the support frame and the rotating arm, and the limiting assembly is used to prevent the rotating arm from being connected to the support frame when the first spring is not connected to the support frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) By providing a buffer, the car is slowly supported when it contacts auxiliary equipment, preventing deformation of the car floor due to excessive impact. It also enables the support block to automatically rotate to a position aligned with the car or to a position offset from the car, facilitating maintenance operations.

[0016] 2) By setting up an infrared human body sensor, a control box and a starting module, real-time detection in the pit is achieved to detect whether there are maintenance personnel, thereby avoiding the situation where the maintenance personnel forget to start the rotary drive mechanism to rotate the support block to a position directly opposite the car after entering the pit. When the infrared human body sensor senses that someone is in the pit, the rotary drive mechanism is started through the control box and the starting module, so that the support block is in a position to support the car, thereby improving safety during maintenance.

[0017] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of an elevator limit identification system;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a top view of an elevator limit identification system.

[0021] Figure markings: mounting shaft 1, guide column 10, screw 11, nut 12, rotation drive mechanism 2, elastic member 21, first mounting block 211, second mounting block 212, sliding block 22, electromagnetic telescopic rod 24, rotating arm 3, rotating ring 30, support frame 4, left frame 41, right frame 42, mounting seat 43, support block 5, buffer part 6, first mounting assembly 7, insert block 71, first screw 72, second mounting assembly 8, hanging rod 81, downward pressure rod 82, insert rod 83, second spring 84, moving rod 85, roller 86, limit assembly 9, limit rod 91, wedge block 92, pull rod 93, third spring 94, third mounting assembly 100. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figures 1 to 3 As shown, the present invention proposes an elevator limit recognition system, including: an infrared human body sensor, a control box, a starting module, a mounting shaft 1, a rotation drive mechanism 2, a rotating arm 3, a support frame 4, a support block 5 and a buffer part 6; the mounting shaft 1 is installed at the bottom of the elevator shaft, the mounting shaft 1 is hinged to one end of the rotating arm 3, the other end of the rotating arm 3 is connected to the support frame 4, a support block 5 is arranged above the support frame 4, the support block 5 is connected to the support frame 4 through the buffer part 6, the support block 5 is used to contact the bottom of the car, and is connected to the rotating arm 3 with a rotation drive mechanism 2, the rotation drive mechanism 2 is used to drive the support block 5 to face the car or deviate from the car; an infrared human body sensor is installed at the pit in the elevator shaft, the infrared human body sensor is used to sense whether there is someone in the pit; the infrared human body sensor is connected to the control box, and the rotation drive mechanism 2 is connected to the control box through the starting module.

[0024] In order to design a simple structure of the rotary drive mechanism 2, the rotary drive mechanism 2 includes: an elastic member 21, a sliding block 22 and an electromagnetic telescopic rod 24. The electromagnetic telescopic rod 24 is installed next to the support frame 4 and the mounting shaft 1. The output part of the electromagnetic telescopic rod 24 is hinged to the sliding block 22. The sliding block 22 can be slidably installed on the rotating arm 3. An elastic member 21 is installed at the hinge between the mounting shaft 1 and the rotating arm 3. Under the elastic force of the elastic member 21, the support block 5 can be kept in a position away from the car. The electromagnetic telescopic rod 24 is used to transport the support block 5 to the bottom of the car by pushing the rotating arm 3 after power is turned on.

[0025] In order to design a starting module with a simple structure and realize power supply and driving of the rotary drive mechanism 2, the starting module includes: a relay, the electromagnetic telescopic rod 24 is connected to the starting power supply through the relay, and the control end of the relay is connected to the control box.

[0026] The elastic member 21 is a coil spring, and a guide column 10 is erected on the top surface of the mounting shaft 1. A rotating ring 30 is surrounded by the guide column 10. The rotating ring 30 is supported by the mounting shaft 1. The rotating ring 30 is fixed to one end of the rotating arm 3. A screw 11 extends from the top of the guide column 10, and a nut 12 is threadedly connected to the screw 11.

[0027] The top surface of the rotating ring 30 is recessed to form a groove for accommodating the coil spring, and the groove surrounds the outside of the screw 11. A first mounting block 211 extends from the inner end of the coil spring, and a second mounting block 212 extends from the outer end of the coil spring. The first mounting block 211 and the second mounting block 212 are both T-shaped structures. A step is formed at the connection between the screw 11 and the guide column 10. The step is recessed to form a first slot for inserting the first mounting block 211. The top surface of the rotating ring 30 is recessed to form a second slot for inserting the second mounting block 212. The nut 12 covers the first mounting block 211, the second mounting block 212 and the rotating ring 30.

[0028] By rotating the nut 12, the installation of the rotating ring 30 and the coil spring can be achieved, which makes it convenient to remove the coil spring when it is damaged. The nut 12 limits the first mounting block 211 from being separated from the guide column 10 and the second mounting block 212 from being separated from the rotating ring 30. The top view of the first mounting block 211 and the second mounting block 212 are both T-shaped structures, thereby ensuring that the inner end of the coil spring will not be separated from the guide column 10 and the outer end of the coil spring will not be separated from the rotating ring 30.

[0029] In order to design a buffer part 6 with a simple structure, the buffer part 6 includes: a first spring, one end of the first spring is connected to the support block 5, and the other end of the first spring is connected to the support frame 4. A receiving groove is formed on the top surface of the support frame 4, and the receiving groove is used to receive the first spring.

[0030] In order to facilitate the installation of the first spring, one end of the first spring is detachably connected to the support block 5 through the first installation component 7, and the other end of the first spring is detachably connected to the support frame 4 through the second installation component 8.

[0031] A first mounting hook is formed by extending from the top end of the first spring, and a second mounting hook is formed by extending from the bottom end of the first spring.

[0032] The first mounting assembly 7 includes: an insert block 71 and a first screw 72. The insert block 71 passes through the first mounting hook. The bottom surface of the support block 5 is recessed to form a mounting groove for the first mounting hook to be placed in the mounting groove. The insert block 71 is connected to the support block 5 through the first screw 72.

[0033] In order to facilitate on-site assembly, the rotating arm 3 is detachably connected to the support frame 4 via the third mounting assembly 100 .

[0034] The third mounting assembly 100 is a second screw, which connects the rotating arm 3 to the supporting frame 4 .

[0035] In order to prevent the first spring from popping out after performing the function of supporting the car due to forgetting to install the first spring during the installation process, the second installation component 8 is connected to the limiting component 9, and the limiting component 9 extends to the position where the support frame 4 and the rotating arm 3 are connected. The limiting component 9 is used to prevent the rotating arm 3 from being connected to the support frame 4 when the first spring is not connected to the support frame 4.

[0036] The support frame 4 includes a left frame body 41 and a right frame body 42. The left frame body 41 and the right frame body 42 engage to clamp a mounting seat 43 and a cavity located below the receiving groove. The left frame body 41 and the right frame body 42 are connected by a second screw. When the left frame body 41 and the right frame body 42 are clamped, the mounting seat 43 does not move relative to the support frame 4. The cavity is located below the mounting seat 43.

[0037] The second mounting assembly 8 includes: a hanging rod 81, a pressing rod 82, an inserting rod 83, a second spring 84, a moving rod 85 and a roller 86. The top surface of the mounting seat 43 is recessed to form a slot for the hanging rod 81 to be inserted, and a hook rod is formed on the top of the hanging rod 81 to hook the second mounting hook. The hanging rod 81 is connected to the pressing rod 82 located next to the first spring. The pressing rod 82 is provided with a socket for one end of the inserting rod 83 to enter and exit. The other end of the inserting rod 83 is connected to one end of the moving rod 85, and the other end of the moving rod 85 is equipped with a rotatable roller 86. The roller 86 is used to act with the limit assembly 9. The limit assembly 9 is used to keep the inserting rod 83 in the state of entering and exiting the socket after acting with the rotating arm 3. The inserting rod 83 passes through the second spring 84, and the elastic force of the second spring 84 is used to keep the inserting rod 83 away from the hanging rod 81. The mounting seat 43 guides the inserting rod 83 and the moving rod 85 to move only in the horizontal direction.

[0038] The limit assembly 9 includes: a limit rod 91, a wedge block 92, a pull rod 93 and a third spring 94. A sliding groove is provided on one side of the right frame 42 to connect the outside with the cavity. One end of the limit rod 91 is inserted into the limit hole opened in the rotating arm 3. The limit rod 91 cannot move relative to the rotating arm 3. The other end of the limit rod 91 is fixed to the large end of the wedge block 92. The small end of the wedge block 92 is located above the large end of the wedge block 92. The small end of the wedge block 92 is fixed to one end of the pull rod 93. The other end of the pull rod 93 extends toward the top of the accommodating groove. The mounting seat 43 guides the pull rod 93 to move only in the vertical direction. The pull rod 93 passes through the third spring 94. The wedge block 92 and the mounting seat 43 clamp the third spring 94. Under the elastic force of the third spring 94, the roller 86 can be kept tangent to the small end of the wedge block 92 and the insertion rod 83 is not inserted into the hanging rod 81.

[0039] When installing the first spring, first, insert the first plug block 71 into the support block 5, and connect the first plug block 71 to the support block 5 through the first screw 72; then, hook the hanging rod 81 on the second mounting hook of the first spring; then, insert the hanging rod 81 with the second mounting hook into the slot, and the inner wall of the slot restricts the second mounting hook hanging rod 81 from being disengaged (at this time, under the elastic force of the third spring 94, the wedge block 92 is in a lower position, and the small end of the wedge block 92 acts on the roller 86, and the squeezing force on the roller 86 is not large, and the second Under the elastic force of spring 84, the moving rod 85 drives the insertion rod 83 away from the slot, so it will not hinder the hanging rod 81 from being inserted into the slot); then, the pull rod 93 is pulled, so that the large end of the wedge block 92 acts on the roller 86, thereby pressing the insertion rod 83 into the hanging rod 81 and maintaining this state; finally, the rotating arm 3 is pressed against the support frame 4, and the rotating arm 3 is connected to the support frame 4 through the third mounting assembly 100, which also limits the lowering of the limit rod 91, thereby maintaining the state of the wedge block 92 pressing the insertion rod 83 into the hanging rod 81.

[0040] First, in order to enable the support block 5 to slowly interact with the car during the process of supporting the car, a buffer part 6 is designed; then, in order to ensure that the support block 5 can be fully supported, a receiving groove is designed on the support frame 4, so that when the support block 5 is supported, the first spring can be compressed in the receiving groove, thereby avoiding the first spring from being crushed, and also avoiding the support block 5 from being damaged due to the uneven surface of the support block 5, thereby improving the protection of the support block 5 and the first spring; then, due to the provision of the receiving groove, the installation difficulty of the second mounting hook of the first spring is increased, so a second mounting assembly 8 is designed, so that the second mounting hook and the hanging rod 81 are pressed into the slot together outside the receiving groove; further, in order to prevent the hanging rod 81 from detaching from the slot, an insertion rod 83 is designed; then, in order to prevent the insertion rod 83 from obstructing the hanging rod 81 Inserted into the slot, a second spring 84 is designed; then, in order to limit the insertion rod 83, a limit assembly 9 is designed; furthermore, in order to ensure that the limit assembly 9 slides smoothly relative to the insertion rod 83, a roller 86 is designed; finally, in order to position the limit assembly 9 and conveniently indicate whether the limit assembly 9 is installed in place, a limit rod 91 is designed to be inserted into the rotating arm 3, so that the rotating arm 3 and the support frame 4 can be installed in place only when the wedge block 92 is pulled into place, thereby avoiding the phenomenon of adjusting the limit assembly 9 to limit the second installation assembly 8, because it is easy to observe whether the support frame 4 is connected to the rotating arm 3 in place, thereby avoiding the bottom of the first spring being installed in place, causing the first spring to bounce and disengage from the support frame 4 when the support block 5 is raised, and avoiding the phenomenon that the first spring is difficult to return to its position.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An elevator limit recognition system, characterized in that: include: Infrared human body sensor, control box, starting module, mounting shaft, rotary drive mechanism, rotating arm, support frame, support block and buffer part; The mounting shaft is installed at the bottom of the elevator shaft, the mounting shaft is hinged to one end of the rotating arm, the other end of the rotating arm is connected to the support frame, a support block is provided above the support frame, the support block is connected to the support frame through a buffer portion, the support block is used to contact the bottom of the car, and a rotation drive mechanism is connected to the rotating arm, and the rotation drive mechanism is used to drive the support block to face the car or deviate from the car; An infrared human body sensor is installed in the pit of the elevator shaft to detect whether there is anyone in the pit; The infrared human body sensor is connected to the control box, and the rotation drive mechanism is connected to the control box through the starting module; The buffer portion includes: a first spring, one end of the first spring is connected to the support block, the other end of the first spring is connected to the support frame, and a receiving groove is formed on the top surface of the support frame, and the receiving groove is used to receive the first spring; One end of the first spring is detachably connected to the support block via a first mounting assembly, and the other end of the first spring is detachably connected to the support frame via a second mounting assembly; The rotating arm is detachably connected to the support frame via a third mounting assembly; The third mounting assembly is a second screw, which connects the rotating arm to the support frame; The second mounting assembly is connected to the limiting assembly, the limiting assembly extends into the position between the support frame and the rotating arm, and the limiting assembly is used to prevent the rotating arm from being connected to the support frame when the first spring is not connected to the support frame; The support frame includes: a left frame body and a right frame body, the left frame body and the right frame body are buckled together to clamp a mounting seat and a cavity located below the accommodating groove, the left frame body and the right frame body are connected by a second screw, the mounting seat does not move relative to the support frame after the left frame body and the right frame body are clamped, and the cavity is located below the mounting seat; The second mounting assembly includes: a hanging rod, a pressing rod, an inserting rod, a second spring, a moving rod and a roller, the top surface of the mounting seat is recessed to form a slot for the hanging rod to be inserted, and a hook rod is formed on the top of the hanging rod to hook the second mounting hook, the hanging rod is connected to the pressing rod located next to the first spring, the pressing rod is provided with a socket for one end of the inserting rod to enter and exit, the other end of the inserting rod is connected to one end of the moving rod, and a rotatable roller is installed on the other end of the moving rod for interacting with the limiting assembly, and the limiting assembly is used to keep the inserting rod in the state of entering and exiting the socket after interacting with the rotating arm, the inserting rod passes through the second spring, and the elastic force of the second spring is used to keep the inserting rod away from the hanging rod, and the mounting seat guides the inserting rod and the moving rod to move only in the horizontal direction; The limit assembly includes: a limit rod, a wedge block, a pull rod and a third spring. A sliding groove is provided on one side of the right frame to connect the outside with the cavity. One end of the limit rod is inserted into the limit hole opened in the rotating arm. The limit rod cannot move relative to the rotating arm. The other end of the limit rod is fixed to the large end of the wedge block. The small end of the wedge block is located above the large end of the wedge block. The small end of the wedge block is fixed to one end of the pull rod, and the other end of the pull rod extends toward the top of the accommodating groove. The mounting seat guide pull rod can only move in the vertical direction. The pull rod passes through the third spring, and the wedge block and the mounting seat clamp the third spring. Under the elastic force of the third spring, the roller can be kept tangent to the small end of the wedge block and the insertion rod is not inserted into the hanging rod.

2. An elevator limit identification system according to claim 1, characterized in that: The rotary drive mechanism includes: an elastic member, a sliding block and an electromagnetic telescopic rod. The electromagnetic telescopic rod is installed next to the support frame and the mounting shaft. The output part of the electromagnetic telescopic rod is hinged to the sliding block. The sliding block can be slidably installed on the rotating arm. An elastic member is installed at the hinge of the mounting shaft and the rotating arm. Under the elastic force of the elastic member, the support block can be kept in a position away from the car. The electromagnetic telescopic rod is used to transport the support block to the bottom of the car by pushing the rotating arm after power is turned on.

3. An elevator limit identification system according to claim 2, characterized in that: The starting module includes: a relay, the electromagnetic telescopic rod is connected to the starting power supply through the relay, and the control end of the relay is connected to the control box.

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