Safety anti-pinch device for elevator car

Abstract

The invention provides safety anti-pinch equipment for an elevator car, and belongs to the field of elevators. Comprising a lift car body and lift car doors, the two lift car doors are installed on the lift car body, round rollers are arranged on the sides, located in an inner cavity of the lift car body, of the two lift car doors, round grooves are formed in the upper ends and the lower ends of the round rollers, connecting shafts are installed in the round grooves, and installation assemblies are arranged at the ends, away from the round grooves, of the connecting shafts. A rotary driving assembly is arranged at the other end of the connecting shaft, and two vertical grooves are symmetrically formed in the round roller. The motor drives the rotating shaft to rotate, the rotating shaft drives the first gear to be meshed with the second gear to rotate, the second gear is meshed with the annular gear to rotate, the annular gear drives the round rollers to rotate, and people or objects located between the car doors can be pushed into the car body through the two round rollers rotating reversely; therefore, people or objects are prevented from being clamped by the car door, the active anti-pinch function is achieved, and the anti-pinch effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator car safety anti-pinch device. Background Art

[0002] In modern buildings, elevator cars are key vehicles for vertical movement, and their safety is crucial. Elevator cars are relatively enclosed spaces with frequent movement, and the consequences of accidents involving people or objects being trapped can be disastrous.

[0003] The prior art discloses an anti-pinch elevator door with publication number CN115180487B, which includes an outer frame device, an anti-pinch device movably mounted on the rear side of the outer frame device, an anti-collision protection device fixedly mounted inside the anti-pinch device, and an anti-impact stabilization device fixedly mounted on the bottom of the outer frame device. An anti-pinch device is mounted on the device, which uses a drive motor, a threaded rod, a first movable block, a first connecting rod, a second movable block, a second connecting rod, a first elevator door, a second elevator door, a slider, a slide groove, a controller, and a telescopic rod to move the two elevator doors with the power provided by the drive motor. If a person is pinched, the induction light will sense that the person is pinched, and the controller will be triggered to drive the telescopic rod to move until it enters the groove and buckles the two elevator doors. The pinched part can be removed only when the elevator doors stop moving. The device has a simple structure and is easy to operate. This existing technology for preventing elevator car traps relies on active human avoidance. If an object is trapped, the elevator will stop because the object is not removed, which is detrimental to its normal operation. When the elevator door is open, the elevator car is in an open state, with people and objects frequently entering and exiting. Existing equipment cannot effectively block the elevator door gap, making it easy for foreign objects to fall through. If a foreign object is trapped when the car door is closed, it will not only cause the elevator to jam and make abnormal noises, affecting the normal riding experience, but may also damage the elevator car's mechanical structures, such as the door machine system and guide rails, over the long term, reducing the stability of the elevator operation and increasing safety hazards.

[0004] Based on the above reasons, the present invention proposes an elevator car safety anti-pinch device, which can actively move people or objects to one side to achieve the active anti-pinch function, and can also achieve shielding protection when the car door is open, reducing the impact of foreign objects on the operation of the elevator. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an elevator car safety anti-pinch device with the advantages of active anti-pinch and shielding protection.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An elevator car safety anti-pinch device includes a car body, two car doors are installed on the car body, and the two car doors are located on one side of the inner cavity of the car body and are provided with round rollers. The upper and lower ends of the round rollers are provided with round grooves, and a connecting shaft is installed in the round groove. The connecting shaft is provided with a mounting assembly at one end away from the round groove, and a rotating drive assembly is provided at the other end of the connecting shaft. Two vertical grooves are symmetrically provided on the round roller, and a shielding assembly is provided in the vertical groove.

[0008] Preferably, the mounting assembly includes a mounting plate, which is fixedly connected to the connecting shaft and is concavely arranged, a fixed shaft is fixedly connected inside the mounting plate, a connecting plate is movably connected to the fixed shaft, and the connecting plate is L-shaped and fixedly mounted to the car door.

[0009] Preferably, two springs are sleeved on the fixed shaft, and two ends of the springs are fixedly connected to the connecting plate and the inner wall of the mounting plate respectively. Two control switches are symmetrically fixedly connected to the inner wall of the mounting plate.

[0010] Preferably, the rotary drive assembly includes a motor, the motor is fixedly connected to the connecting shaft, the rotor is fixedly connected to a rotating shaft, and the rotating shaft is fixedly connected to the first gear.

[0011] Preferably, a ring gear is fixedly connected to the inner wall of the circular groove, and three second gears meshing with the first gear and the ring gear are evenly distributed in the circular groove. A vertical shaft is fixedly connected to the center of the side wall of the second gear, and the vertical shaft is movably connected to the connecting shaft.

[0012] Preferably, the shielding assembly includes a baffle, which is inserted into the vertical slot and fixedly connected to an electric push rod at the center of the side wall. Two round rods are movably connected to the baffle, and the round rods and the electric push rod are fixedly connected to the inner wall of the vertical slot.

[0013] Preferably, a fixing sleeve is sleeved on the outer side wall of the connecting shaft, an annular plate is movably connected to the outer wall of the fixing sleeve, and the annular plate is fixedly connected to the circular roller via a first bolt.

[0014] Preferably, an annular groove is provided on the inner wall of the annular plate, an annular slide rail is fixedly connected to the outer wall of the fixed sleeve, and the annular slide rail is movably connected to the annular groove.

[0015] Preferably, a leather pad is fixedly connected to the outer side wall of the circular roller, and another leather pad is fixedly connected to the side wall of the baffle.

[0016] Preferably, the cross section of the fixed shaft is arranged in a regular hexagonal shape, and the fixed shaft passes through the connecting plate and is matched with the connecting plate.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention drives the rotating shaft to rotate by a motor, the rotating shaft drives the first gear to mesh with the second gear to rotate, the second gear to mesh with the ring gear to rotate, and the ring gear drives the round roller to rotate. The two round rollers rotating in opposite directions can push people or objects between the car doors into the car body, thereby preventing people or objects from being clamped by the car doors, realizing an active anti-pinch function and having a good anti-pinch effect.

[0019] The present invention drives the baffle to move through an electric push rod, so that the baffle extends a certain distance in the vertical groove, so that the baffle blocks the gaps on both sides of the car door without affecting the normal function of the elevator, avoiding the influence of foreign objects stuck in the gap on the elevator operation, and improving the stability of the elevator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

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

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the anti-pinch device of the present invention;

[0023] Figure 3 is a schematic diagram of a transverse cross-sectional three-dimensional structure of the anti-pinch device of the present invention;

[0024] Figure 4 It is a schematic diagram of the longitudinal cross-section of the anti-pinch device of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the installation assembly of the present invention;

[0026] Figure 6 is a schematic diagram of the three-dimensional structure of the rotary drive assembly of the present invention;

[0027] Figure 7 The present invention Figure 3 A magnified view of point A;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the shielding component of the present invention.

[0029] [reference numerals]

[0030] 1. Car body; 2. Car door; 3. Round roller; 4. Round groove; 5. Connecting shaft; 6. Mounting assembly; 7. Rotating drive assembly; 8. Vertical groove; 9. Shielding assembly; 10. Mounting plate; 11. Fixed shaft; 12. Connecting plate; 13. Spring; 14. Motor; 15. Rotating shaft; 16. First gear; 17. Ring gear; 18. Second gear; 19. Vertical shaft; 20. Baffle; 21. Electric push rod; 22. Round rod; 23. Fixed sleeve; 24. Ring plate; 25. First bolt; 26. Ring groove; 27. Ring slide rail; 28. Leather pad; 29. Control switch.

[0031] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0032] The following describes in detail an elevator car safety anti-pinch device provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0033] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0034] like Figure 1-8As shown, the embodiment of the present invention provides an elevator car safety anti-pinch device, including a car body 1, two car doors 2 are installed on the car body 1, and the two car doors 2 are located on one side of the inner cavity of the car body 1. Round rollers 3 are provided, and round grooves 4 are opened at the upper and lower ends of the round rollers 3. A connecting shaft 5 is installed in the round groove 4, and a mounting assembly 6 is provided at the end of the connecting shaft 5 away from the round groove 4. The mounting assembly 6 includes a mounting plate 10, which is fixedly connected to the connecting shaft 5 and is concave. A fixed shaft 11 is fixedly connected to the mounting plate 10, and a connecting plate 12 is movably connected to the fixed shaft 11. The connecting plate 12 is L-shaped and fixedly installed with the car door 2, and two springs 13 are sleeved on the fixed shaft 11. The two ends of the spring 13 are fixedly connected to the connecting plate 12 and the inner wall of the mounting plate 10 respectively, and two control switches 29 are symmetrically fixedly connected to the inner wall of the mounting plate 10. The cross-section of the fixed shaft 11 is a regular hexagon, and the fixed shaft 11 passes through the connecting plate 12 and is matched with the connecting plate 12.

[0035] In the technical solution of this embodiment, when the anti-pinch device is installed between the car door 2, the connecting plate 12 is fixed to the upper and lower positions on the inner wall of the car door 2 by external bolts, so that the anti-pinch device and the car door 2 can be fixed conveniently. When the two car doors 2 are merged, the two round rollers 3 drive the mounting plates 10 on both sides to move, and the spring 13 on one side is compressed. When the car door 2 is completely closed, the connecting plate 12 can press the control switch 29 on one side to open. At this time, the operation of the internal rotary drive component 7 can be used to drive the round roller 3 to rotate a certain number of circles to achieve the anti-pinch function. If the two car doors 2 are opened, the connecting plate 12 will press the control switch 29 on the other side of the mounting plate 10 to open. At this time, the shielding component 9 can be controlled to achieve the function of preventing foreign objects from being clamped.

[0036] Furthermore, a fixing sleeve 23 is sleeved on the outer wall of the connecting shaft 5, and an annular plate 24 is movably connected to the outer wall of the fixing sleeve 23. The annular plate 24 is fixedly connected to the round roller 3 by a first bolt 25, which can realize convenient installation between the connecting shaft 5 and the mounting plate 10 and facilitate subsequent maintenance operations;

[0037] Furthermore, an annular groove 26 is formed on the inner wall of the annular plate 24, and an annular slide rail 27 is fixedly connected to the outer wall of the fixed sleeve 23. The annular slide rail 27 is movably connected to the annular groove 26. The movement of the annular slide rail 27 in the annular groove 26 can make the round roller 3 rotate stably, which is convenient for use.

[0038] A rotary drive assembly 7 is provided at the other end of the connecting shaft 5. The rotary drive assembly 7 includes a motor 14. The motor 14 is fixedly connected to the connecting shaft 5 and a rotating shaft 15 is fixedly connected to the rotor. A first gear 16 is fixedly connected to the rotating shaft 15. A ring gear 17 is fixedly connected to the inner wall of the circular groove 4. Three second gears 18 that mesh with the first gear 16 and the ring gear 17 are evenly distributed in the circular groove 4. A vertical shaft 19 is fixedly connected to the center of the side wall of the second gear 18. The vertical shaft 19 is movably connected to the connecting shaft 5.

[0039] In the technical solution of this embodiment, when a person or object is clamped between the two car doors 2, the motors 14 inside the circular rollers 3 on both sides are started and run in opposite directions. The motor 14 drives the rotating shaft 15 to rotate, and the rotating shaft 15 drives the first gear 16 to engage the second gear 18 to rotate. The second gear 18 engages the ring gear 17 to rotate, and the ring gear 17 drives the circular rollers 3 to rotate. The two counter-rotating circular rollers 3 can push the person or object between the car doors 2 into the car body 1, thereby preventing the person or object from being clamped by the car doors 2, realizing an active anti-pinch function with a good anti-pinch effect.

[0040] Two vertical slots 8 are symmetrically formed on the round roller 3. A shielding assembly 9 is provided in the vertical slot 8. The shielding assembly 9 includes a baffle 20. The baffle 20 is inserted into the vertical slot 8 and a motorized push rod 21 is fixedly connected to the center of the side wall. Two round rods 22 are movably connected to the baffle 20. The round rods 22 and the motorized push rod 21 are both fixedly connected to the inner wall of the vertical slot 8.

[0041] In the technical solution of this embodiment, when the two car doors 2 are fully opened, the electric push rod 21 is started, and the electric push rod 21 drives the baffle 20 to move, so that the baffle 20 extends a certain distance in the vertical groove 8, so that the baffle 20 blocks the gaps on both sides of the car door 2 without affecting the normal function of the elevator, avoiding the impact of foreign objects getting stuck in the gaps on the elevator operation, and improving the stability of the elevator operation.

[0042] Furthermore, a leather pad 28 is fixedly connected to the outer wall of the round roller 3, and another leather pad 28 is fixedly connected to the side wall of the baffle 20. The provision of the leather pad 28 can reduce harm to personnel on the one hand, and increase friction on the other hand, facilitating the driving operation of the clamped object.

[0043] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0044] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An elevator car safety anti-pinch device, comprising a car body (1), characterized in that: Two car doors (2) are installed on the car body (1), and the two car doors (2) are both provided with a round roller (3) on one side of the inner cavity of the car body (1). The upper and lower ends of the round roller (3) are provided with round grooves (4), and a connecting shaft (5) is installed in the round groove (4). The end of the connecting shaft (5) away from the round groove (4) is provided with a mounting assembly (6), and the other end of the connecting shaft (5) is provided with a rotating drive assembly (7). Two vertical grooves (8) are symmetrically provided on the round roller (3), and a shielding assembly (9) is provided in the vertical groove (8).

2. The elevator car anti-pinch safety device according to claim 1, characterized in that: The mounting assembly (6) includes a mounting plate (10), the mounting plate (10) is fixedly connected to the connecting shaft (5) and is arranged in a concave shape, a fixed shaft (11) is fixedly connected inside the mounting plate (10), a connecting plate (12) is movably connected to the fixed shaft (11), and the connecting plate (12) is arranged in an L shape and is fixedly mounted on the car door (2).

3. The elevator car anti-pinch safety device according to claim 2, characterized in that: Two springs (13) are sleeved on the fixed shaft (11), and two ends of the spring (13) are fixedly connected to the connecting plate (12) and the inner wall of the mounting plate (10), respectively. Two control switches (29) are symmetrically fixedly connected to the inner wall of the mounting plate (10).

4. The elevator car anti-pinch safety device according to claim 3, characterized in that: The rotary drive assembly (7) comprises a motor (14), the motor (14) is fixedly connected to the connecting shaft (5), a rotating shaft (15) is fixedly connected to the rotor, and a first gear (16) is fixedly connected to the rotating shaft (15).

5. The elevator car anti-pinch safety device according to claim 4, characterized in that: A ring gear (17) is fixedly connected to the inner wall of the circular groove (4), and three second gears (18) are evenly distributed in the circular groove (4) and mesh with the first gear (16) and the ring gear (17). A vertical shaft (19) is fixedly connected to the center of the side wall of the second gear (18), and the vertical shaft (19) is movably connected to the connecting shaft (5).

6. The elevator car anti-pinch safety device according to claim 5, characterized in that: The shielding assembly (9) includes a baffle (20), the baffle (20) is inserted into the vertical slot (8) and is fixedly connected to an electric push rod (21) at the center of the side wall. Two round rods (22) are movably connected to the baffle (20), and the round rods (22) and the electric push rod (21) are both fixedly connected to the inner wall of the vertical slot (8).

7. The elevator car anti-pinch safety device according to claim 6, characterized in that: A fixed sleeve (23) is sleeved on the outer wall of the connecting shaft (5), and an annular plate (24) is movably connected to the outer wall of the fixed sleeve (23). The annular plate (24) is fixedly connected to the round roller (3) through a first bolt (25).

8. The elevator car anti-pinch safety device according to claim 7, characterized in that: An annular groove (26) is provided on the inner wall of the annular plate (24), and an annular slide rail (27) is fixedly connected to the outer wall of the fixed sleeve (23), and the annular slide rail (27) is movably connected to the annular groove (26).

9. The elevator car anti-pinch safety device according to claim 8, characterized in that: A leather pad (28) is fixedly connected to the outer side wall of the round roller (3), and another leather pad (28) is fixedly connected to the side wall of the baffle (20).

10. The elevator car anti-pinch safety device according to claim 9, characterized in that: The cross section of the fixed shaft (11) is arranged in a regular hexagonal shape, and the fixed shaft (11) passes through the connecting plate (12) and is matched with the connecting plate (12).

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