Lifting clamp for elevator car maintenance and positioning method

Abstract

The invention discloses a hoisting clamp for elevator car maintenance. The hoisting clamp comprises a frame body, and a top plate, a driving assembly, a moving assembly and an abutting assembly which are fixedly connected to the top end of the frame body. The invention further discloses a positioning method for elevator car maintenance. The positioning method comprises the steps that the position is adjusted, adjustment is conducted according to the width of the elevator car, stable rising is conducted, the elevator car can be lifted again to abut against and support the elevator car, accurate positioning is conducted, and the position of the elevator car can be accurately positioned according to requirements. A T-shaped block is extruded in the process that the elevator car is lifted through a crane carriage, the T-shaped block is driven to drive a sliding plate to move downwards, a convex rod is driven to extrude an inclined plate on one side, the inclined plate is stressed to move backwards, and a baffle on one side of a fixed plate is driven through a round rod to be attached to the two sides of the elevator car to abut against the two sides of the elevator car; therefore, shaking caused by the weight of the elevator car in the ascending process is effectively counteracted, and stable ascending of the elevator car is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator cars, and in particular to a lifting fixture and a positioning method for elevator car maintenance. Background Art

[0002] Modern elevators are mainly composed of traction winches, guide rails, counterweights, safety devices (such as speed limiters, safety clamps and buffers, etc.), signal control systems, cars and hall doors, etc. These parts are installed in the shaft and machine room of the building respectively. Usually, wire rope friction transmission is adopted. The wire rope is passed around the traction wheel, and the two ends are connected to the car and the counterweight respectively. The motor drives the traction wheel to make the car rise and fall. Elevators require safety and reliability, high transportation efficiency, accurate balance and comfortable ride. The basic parameters of elevators mainly include rated load, number of passengers, rated speed, car outline dimensions and shaft type.

[0003] For the current lifting fixture, the existing lifting device for assembling the upper cross beam of an elevator car disclosed in patent number "CN209988977U" clamps the two ends of the upper beam through two pairs of L-shaped clamps and the action of the cylinder, and then shortens the rope through the winding wheel to make the upper beam move upward. However, during the ascent of the elevator car, due to the weight it carries, a certain degree of shaking may occur. If there is a lack of sufficient stability control, this shaking may be aggravated. In extreme cases, it may even cause the car to lose control, resulting in the risk of falling from a height, which undoubtedly constitutes a great safety hazard. Accordingly, this application proposes a utility model content, a lifting fixture and positioning method for elevator car maintenance. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a lifting clamp for elevator car maintenance.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A lifting fixture for elevator car maintenance comprises a frame and a top plate fixedly connected to the top of the frame; A groove is formed on the upper surface of the top plate, a nut is slidably connected to the inner wall of the groove, and a driving assembly is installed on the top plate, and the driving assembly is used to drive the nut to move horizontally; The bottom of the nut is fixedly connected with a support plate, the interior of the support plate is slidably connected with a nut, and a moving component is installed inside the support plate, and the moving component is used to drive the nut to slide horizontally; A lifting trolley is installed at the bottom of the nut, and a connecting plate is installed at the bottom of the lifting trolley, the inner wall of the connecting plate is rotatably connected with a double-headed screw, a hook is installed at the bottom of the connecting plate, the front end of the double-headed screw is fixedly connected with a turning handle, the double-headed screw is threadedly connected with a protrusion, the bottom of the protrusion is fixedly connected with a supporting plate, the inside of the supporting plate is slidably connected with a slide plate, a plurality of limiting holes are evenly provided on the upper surface of the slide plate, annular grooves are relatively provided on the side walls of the slide plate, a fixing rod is slidably connected to the inner wall of the annular groove, and a fixing rod is fixedly connected to the front and rear ends of the fixing rod with a clamping block, and an end of the clamping block away from the fixing rod is fixedly connected to the fixing plate; A resistance component is installed inside the fixing plate, and the resistance component is used to resist the two sides of the inner wall of the elevator car; The abutment assembly comprises a first spring fixedly connected to the inner wall of the fixed plate and a round rod slidably connected to the side wall of the fixed plate, the first spring is fixedly connected to a sliding plate at one end away from the fixed plate, a group of T-shaped plates are fixedly connected to the upper end of the sliding plate, and a plurality of convex rods are evenly arranged on one side of the sliding plate; The front end of the round rod is fixedly connected with a baffle, the end of the round rod away from the baffle is fixedly connected with an inclined plate, the side of the inclined plate close to the round rod is fixedly connected with a plurality of second springs, and the plurality of second springs are fixedly connected with the fixed plate.

[0006] Preferably, the driving assembly comprises a first motor fixedly connected to the upper surface of the top plate, the output end of the first motor is fixedly connected to a rotating shaft, an end of the rotating shaft away from the motor is fixedly connected to a threaded rod, and the threaded rod is threadedly connected to a nut; Two support blocks are fixedly connected to the upper surface of the top plate, and the support blocks are rotatably connected to the screw rod.

[0007] Preferably, a plurality of threaded holes are symmetrically provided at the upper and lower ends of the support plate, and a bolt is threadedly connected to the inner wall of one of the threaded holes.

[0008] Preferably, the moving assembly comprises a second motor fixedly connected to the side wall of the support plate, the output end of the second motor is fixedly connected to a screw rod, and the screw rod is threadedly connected to the nut.

[0009] Preferably, the moving assembly includes a second motor fixedly connected to the front end of the support plate, the output end of the second motor is fixedly connected to a screw rod, the screw rod is rotationally connected to the support plate, and the screw rod is threadedly connected to the nut.

[0010] Preferably, a through hole is formed on the upper surface of the fixing plate, and a thread matching the bolt is formed in the through hole.

[0011] A positioning method for a lifting fixture for elevator car maintenance as described above comprises the following steps: S1. Adjust the position. Adjust the distance between the two support plates according to the width of the elevator car. Unscrew the bolts from the support plates. The fixed plate will then fall from the annular groove at the front end of the slide plate and form a U shape with the support plate. Pull the slide plate to drive the fixed plate into the elevator car to support the elevator car. Screw the bolts into the support plate and the slide plate again to limit them.

[0012] S2. Rise steadily, start the lifting trolley to drive the hook to lift the elevator car. The inner wall of the elevator car squeezes the T-shaped plate, which in turn drives the sliding plate and the protruding rod to move downward, and squeezes the inclined plate on one side, so that the inclined plate moves backward under force, and the round rod on one side immediately pushes the baffle to hold the two sides of the inner wall of the elevator car.

[0013] S3, precise positioning, start the first motor to drive the threaded rod to rotate, and the nut sleeved on the outside will drive the bottom support plate and the lifting trolley to move horizontally, start the second motor to drive the screw rod to rotate, and the nut sleeved on the outside will drive the lifting trolley to move longitudinally, the position of the elevator car after lifting can be accurately positioned, and then the elevator car can be lowered by the lifting trolley.

[0014] The present invention has the following beneficial effects: 1. By setting up a resistance component, the T-shaped block will be squeezed when the elevator car is raised by the lifting trolley, and the T-shaped block will drive the sliding plate to move downward, and drive the convex rod to squeeze the inclined plate on one side. The inclined plate moves backward under the force, and the baffle on one side of the fixed plate is driven by the round rod to fit to both sides of the elevator car to resist it, thereby effectively offsetting the shaking of the elevator car caused by its own weight during the ascent, ensuring its smooth and safe ascent.

[0015] 2. By setting up a driving assembly and a moving assembly, the first motor drives the screw to rotate, so that the nut sleeved on the outside drives the elevator car at the bottom to move horizontally, and then the second motor drives the screw to rotate, so that the nut drives the elevator car at the bottom to move longitudinally, so that the installation position of the elevator car can be determined quickly and accurately.

[0016] 3. By setting the support plate and the slide plate, the double-headed screw is driven to rotate by the turning handle, and the protrusions on its surface also slide, and drive the support plate to slide to the two sides of the elevator car, and then slide the slide plate out of the support plate, and the fixed plate at the bottom also slides out, and put the fixed plate into the interior of the elevator car to provide solid support for the elevator car, effectively preventing the connection with the hook from breaking due to pressure during the ascent process, thereby preventing the risk of accidental falling of the elevator car. After placement, screw the bolts into the support plate and pass through the slide plate to limit the slide plate to prevent it from sliding unnecessary inside the support plate, thereby ensuring that the stability and reliability of the fixed plate are not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view structural schematic diagram of a lifting fixture for elevator car maintenance proposed by the present invention; Figure 2 It is a schematic diagram of the connection structure between the moving component and the driving component in the present invention; Figure 3 It is a schematic diagram of the internal structure of the mounting plate in the present invention; Figure 4 It is a structural schematic diagram of the connecting plate in the present invention; Figure 5 It is a schematic diagram of the connection structure between the sliding plate and the fixed plate in the present invention; Figure 6 It is a schematic diagram of the internal cross-sectional structure of the fixing plate in the present invention.

[0018] In the figure: 1 frame, 2 top plate, 201 groove, 3 first motor, 4 rotating shaft, 5 support block, 6 threaded rod, 7 nut, 8 support plate, 9 second motor, 10 screw rod, 11 nut, 12 lifting trolley, 13 connecting plate, 14 double-headed screw, 15 handle, 16 protrusion, 17 hook, 18 support plate, 1801 threaded hole, 19 bolt, 20 slide plate, 21 limit hole, 22 annular groove, 23 fixing rod, 24 block, 25 fixing plate, 26 through hole, 27 first spring, 28 sliding plate, 29 protrusion, 30 T-shaped plate, 31 inclined plate, 32 second spring, 33 round rod, 34 baffle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1

[0020] Reference Figure 1 , Figure 5 and Figure 6 , a lifting fixture for elevator car maintenance, comprising a frame 1 and a top plate 2 fixedly connected to the top of the frame 1; A groove 201 is formed on the upper surface of the top plate 2, and a nut 7 is slidably connected to the inner wall of the groove 201. A driving assembly is installed on the top plate 2, and the driving assembly is used to drive the nut 7 to move horizontally; The bottom of the nut 7 is fixedly connected with a support plate 8, the interior of the support plate 8 is slidably connected with a screw nut 11, and a moving component is installed inside the support plate 8, and the moving component is used to drive the screw nut 11 to slide horizontally; A lifting trolley 12 is installed at the bottom of the nut 11, and a connecting plate 13 is installed at the bottom of the lifting trolley 12. A double-headed screw 14 is rotatably connected to the inner wall of the connecting plate 13. A hook 17 is installed at the bottom of the connecting plate 13. A rotating handle 15 is fixedly connected to the front end of the double-headed screw 14. A protrusion 16 is threadedly connected to the double-headed screw 14. A supporting plate 18 is fixedly connected to the bottom of the protrusion 16. A slide plate 20 is slidably connected to the inside of the supporting plate 18. A plurality of limiting holes 21 are evenly provided on the upper surface of the slide plate 20. An annular groove 22 is relatively provided on the side wall of the slide plate 20. A fixing rod 23 is slidably connected to the inner wall of the annular groove 22. A clamping block 24 is fixedly connected to the front and rear ends of the fixing rod 23. A fixing plate 25 is fixedly connected to the end of the clamping block 24 away from the fixing rod 23. A resisting assembly is installed inside the fixing plate 25, and the resisting assembly is used to resist the two sides of the inner wall of the elevator car; The abutment assembly includes a first spring 27 fixedly connected to the inner wall of the fixed plate 25 and a round rod 33 slidably connected to the side wall of the fixed plate 25. The end of the first spring 27 away from the fixed plate 25 is fixedly connected to the sliding plate 28. The upper end of the sliding plate 28 is fixedly connected to a group of T-shaped plates 30. A plurality of convex rods 29 are evenly arranged on one side of the sliding plate 28. A baffle 34 is fixedly connected to the front end of the round rod 33, and an end of the round rod 33 away from the baffle 34 is fixedly connected to an inclined plate 31. A plurality of second springs 32 are fixedly connected to the side of the inclined plate 31 close to the round rod 33, and the plurality of second springs 32 are fixedly connected to the fixed plate 25. It should be noted that the inclined plate 31 is arranged in a T shape, and the inclined plate 31 is arranged in front of a plurality of protruding rods 29, so that the protruding rods 29 directly contact the inclined plate 31 under the drive of the sliding plate 28, and drive the baffle 34 to support the elevator car through the inclined plate 31. At the same time, a rubber pad is installed on the baffle 34. The rubber pad has a high friction coefficient to ensure the stability of the support, and its soft texture can also effectively avoid any scratches or damage to the inner wall of the elevator car during the support process, thereby ensuring the integrity of the elevator car.

[0021] In this embodiment, by rotating the handle 15, the double-headed screw 14 can be driven to rotate, so that the protrusion 16 with its external thread sleeve can move horizontally, and the support plate 18 at the bottom of the protrusion 16 will also move accordingly, so that the support plate 18 and the baffle 34 can be easily and accurately adjusted to the positions on both sides of the inner wall of the elevator car. At this time, the bolt 19 is unscrewed from the support plate 18, and then the slide plate 20 is slid out of the support plate 18, and the fixing plate 25 at the bottom of the slide plate 20 is placed inside the elevator car, and then the hook 17 is connected to the elevator car. Subsequently, the elevator car is driven to rise by the lifting trolley 12. During the rising process, the inner wall of the elevator car will squeeze the T-shaped plate, causing the bottom of the T-shaped plate to The sliding plate 28 moves downward, and at the same time, the protruding rod 29 on the side wall of the sliding plate 28 also moves downward and contacts the inclined plate 31. The inclined plate 31 moves backward after being subjected to the force, and pushes the round rod 33 to slide from the hole on one side of the fixed plate 25. The baffle 34 on its top also slides and fits tightly and firmly supports both sides of the elevator car, effectively preventing any shaking of the elevator car due to its own weight during the ascent, ensuring that the elevator car can slowly rise in a stable and safe manner. When the elevator car is securely placed in the predetermined position, the first spring 27 and the second spring 32 immediately exert their elastic properties to drive the T-shaped block and the baffle 34 to return to their initial positions for the next use. Embodiment 2

[0022] Different from the first embodiment, Figure 2 , this embodiment also has the following further contents: The driving assembly includes a first motor 3 fixedly connected to the upper surface of the top plate 2, the output end of the first motor 3 is fixedly connected to a rotating shaft 4, the end of the rotating shaft 4 away from the motor is fixedly connected to a threaded rod 6, and the threaded rod 6 is threadedly connected to a nut 7; Two support blocks 5 are fixedly connected to the upper surface of the top plate 2, and the support blocks 5 are rotatably connected to the screw rod; The moving assembly includes a second motor 9 fixedly connected to the side wall of the support plate 8 , and a screw rod 10 is fixedly connected to the output end of the second motor 9 , and the screw rod 10 is threadedly connected to a nut 11 .

[0023] In this embodiment, by starting the first motor 3 to drive the rotating shaft 4 to rotate, the threaded rod 6 on the top thereof also rotates, and the nut 7 with an external thread sleeve slides along the groove 201, and drives the support plate 8 at the bottom to move, so as to facilitate the lateral movement of the suspended elevator car. At the same time, by starting the second motor 9 to drive the screw rod 10 to rotate, the nut 11 with an external sleeve also moves, and drives the lifting trolley 12 at the bottom to move longitudinally. Through the cooperation of the threaded rod and the screw rod, the installation position of the elevator car can be quickly and accurately determined. Embodiment 3

[0024] Reference Figure 4 and Figure 5 Compared with the first and second embodiments, in this embodiment, a plurality of threaded holes 1801 are symmetrically provided at the upper and lower ends of the support plate 18, wherein the inner wall of one of the threaded holes 1801 is threadedly connected with a bolt 19, and a through hole 26 is provided on the upper surface of the fixing plate 25, and a thread matching the bolt 19 is provided in the through hole 26.

[0025] In this embodiment, the bolt 19 is unscrewed from the support plate 18. When the bolt 19 is threadedly separated from the through hole 26 on the fixing plate 25, the fixing plate 25 drives the block 24 and the fixing rod 23 to slide to the bottom of the annular groove 22 due to its own weight. Therefore, a gap is generated between the fixing plate 25 and the support plate 18, thereby forming a U shape, and the elevator car can be easily and stably placed between the fixing plate 25 and the support plate 18. At this time, the slide plate 20 is pulled outward to drive the fixing plate 25 to move, and the fixing plate 25 is moved to the inside of the elevator car. When the fixing plate 25 is completely inserted into the elevator car, the bolt 19 is screwed into the support plate again. The plate 18 and the slide plate 20 are limited to prevent them from unnecessary sliding inside the support plate 18, thereby ensuring that the stability and reliability of the fixed plate 25 are not affected. An air cushion is arranged at the top of the fixed plate 25 to ensure that in the process of lifting the elevator car, the fixed plate 25 can be effectively prevented from directly and rigidly contacting the inner wall of the elevator car, thereby avoiding any unnecessary damage or scratches to the inner wall of the car. At the same time, the fixed plate 25 provides solid support for the elevator car, effectively preventing the connection with the hook 17 from breaking due to pressure during the ascent, thereby preventing the risk of accidental falling of the elevator car.

[0026] The present invention further proposes a positioning method for a lifting fixture for elevator car maintenance in the above embodiment, comprising the following steps: S1. Adjust the position. Adjust the distance between the two support plates 18 according to the width of the elevator car. Unscrew the bolts 19 from the support plates 18. The fixing plate 25 then falls from the annular groove 22 at the front end of the slide plate 20 and forms a U shape with the support plate 18. Pull the slide plate 20 to drive the fixing plate 25 into the elevator car to support the elevator car. Screw the bolts 19 into the support plates 18 and the slide plate 20 again to limit them.

[0027] S2, steadily ascend, start the lifting trolley 12 to drive the hook 17 to lift the elevator car, the inner wall of the elevator car squeezes the T-shaped plate 30, which in turn drives the sliding plate 28 and the protruding rod 29 to move downward, and squeezes the inclined plate 31 on one side, so that the inclined plate 31 is forced to move backward, and the round rod 33 on one side immediately pushes the baffle 34 to press against the two sides of the inner wall of the elevator car.

[0028] S3, precise positioning, start the first motor 3 to drive the threaded rod 6 to rotate, and the nut 7 sleeved on the outside thereof will then drive the bottom support plate 8 and the lifting trolley 12 to move horizontally, start the second motor 9 to drive the screw rod 10 to rotate, and the nut 11 sleeved on the outside thereof will then drive the lifting trolley 12 to move longitudinally, so that the position of the elevator car after lifting can be precisely positioned, and then the elevator car can be lowered by the lifting trolley 12.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lifting fixture for elevator car maintenance, characterized in that: include: A frame (1) and a top plate (2) fixedly connected to the top of the frame (1); The upper surface of the top plate (2) is provided with a groove (201), the inner wall of the groove (201) is slidably connected with a nut (7), and a driving assembly is installed on the top plate (2), the driving assembly is used to drive the nut (7) to move horizontally; The bottom of the nut (7) is fixedly connected to a support plate (8), the interior of the support plate (8) is slidably connected to a nut (11), and a moving component is installed inside the support plate (8), the moving component is used to drive the nut (11) to slide horizontally; A lifting trolley (12) is installed at the bottom of the nut (11), a connecting plate (13) is installed at the bottom of the lifting trolley (12), a double-headed screw (14) is rotatably connected to the inner wall of the connecting plate (13), a hook (17) is installed at the bottom of the connecting plate (13), a rotating handle (15) is fixedly connected to the front end of the double-headed screw (14), a protrusion (16) is threadedly connected to the double-headed screw (14), and the bottom of the protrusion (16) is fixedly connected to a support plate (18), a slide plate (20) is slidably connected inside the support plate (18), a plurality of limit holes (21) are evenly spaced on the upper surface of the slide plate (20), annular grooves (22) are relatively opened on the side walls of the slide plate (20), a fixing rod (23) is slidably connected to the inner wall of the annular groove (22), a clamping block (24) is fixedly connected to the front and rear ends of the fixing rod (23), and a fixing plate (25) is fixedly connected to the end of the clamping block (24) away from the fixing rod (23); A resistance component is installed inside the fixing plate (25), and the resistance component is used to resist the two sides of the inner wall of the elevator car; The abutment assembly comprises a first spring (27) fixedly connected to the inner wall of the fixed plate (25) and a round rod (33) slidably connected to the side wall of the fixed plate (25); an end of the first spring (27) away from the fixed plate (25) is fixedly connected to a sliding plate (28); a group of T-shaped plates (30) are fixedly connected to the upper end of the sliding plate (28); and a plurality of convex rods (29) are evenly arranged on one side of the sliding plate (28); The front end of the round rod (33) is fixedly connected to a baffle (34), one end of the round rod (33) away from the baffle (34) is fixedly connected to an inclined plate (31), and a side of the inclined plate (31) close to the round rod (33) is fixedly connected to a plurality of second springs (32), and the plurality of second springs (32) are fixedly connected to the fixing plate (25).

2. A lifting fixture for elevator car maintenance according to claim 1, characterized in that: The driving assembly comprises a first motor (3) fixedly connected to the upper surface of the top plate (2); an output end of the first motor (3) is fixedly connected to a rotating shaft (4); an end of the rotating shaft (4) away from the motor is fixedly connected to a threaded rod (6); and the threaded rod (6) is threadedly connected to a nut (7); Two support blocks (5) are fixedly connected to the upper surface of the top plate (2), and the support blocks (5) are rotatably connected to the screw rod.

3. A lifting fixture for elevator car maintenance according to claim 1, characterized in that: A plurality of threaded holes (1801) are symmetrically provided at the upper and lower ends of the support plate (18), wherein the inner wall of one of the threaded holes (1801) is threadedly connected to a bolt (19).

4. A lifting fixture for elevator car maintenance according to claim 1, characterized in that: The moving assembly comprises a second motor (9) fixedly connected to the side wall of the support plate (8), the output end of the second motor (9) being fixedly connected to a screw rod (10), and the screw rod (10) being threadedly connected to a nut (11).

5. The lifting fixture for elevator car maintenance according to claim 1, characterized in that: The moving assembly comprises a second motor (9) fixedly connected to the front end of the support plate (8); the output end of the second motor (9) is fixedly connected to a screw rod (10); the screw rod (10) is rotationally connected to the support plate (8); and the screw rod (10) is threadedly connected to a nut (11).

6. A lifting fixture for elevator car maintenance according to claim 1, characterized in that: A through hole (26) is provided on the upper surface of the fixing plate (25), and a thread matching the bolt (19) is provided in the through hole (26).

7. A method for positioning a lifting fixture for elevator car maintenance, using the lifting fixture for elevator car maintenance according to any one of claims 1 to 6, comprising the following steps: S1. Adjust the position. Adjust the distance between the two support plates (18) according to the width of the elevator car. Unscrew the bolt (19) from the support plate (18). The fixed plate (25) then falls from the annular groove (22) at the front end of the slide plate (20) and forms a U shape with the support plate (18). Pull the slide plate (20) to drive the fixed plate (25) into the elevator car to support the elevator car. Screw the bolt (19) into the support plate (18) and the slide plate (20) again to limit them. S2, steadily ascending, starting the lifting trolley (12) to drive the hook (17) to lift the elevator car, the inner wall of the elevator car squeezes the T-shaped plate (30), thereby driving the sliding plate (28) and the protruding rod (29) to move downward, and squeezing the inclined plate (31) on one side, so that the inclined plate (31) is forced to move backward, and the round rod (33) on one side thereof then pushes the baffle (34) to press against the two sides of the inner wall of the elevator car; S3, accurate positioning, start the first motor (3) to drive the threaded rod (6) to rotate, and the nut (7) sleeved on the outside thereof will then drive the bottom support plate (8) and the lifting trolley (12) to move horizontally, start the second motor (9) to drive the screw rod (10) to rotate, and the nut (11) sleeved on the outside thereof will then drive the lifting trolley (12) to move longitudinally, so that the position of the elevator car after lifting can be accurately positioned, and then the elevator car can be lowered by the lifting trolley (12).

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