Bidirectional driving type elevator car and direction switching control device thereof

Abstract

The invention belongs to the technical field of elevators, and particularly relates to a bidirectional driving type elevator car and a direction switching control device thereof.The bidirectional driving type elevator car comprises a box body, a steel wire rope is connected to the top of the box body, a mounting plate is arranged on the upper side of the box body, strip-shaped holes are formed in the two sides of the surface of the mounting plate, and the steel wire rope movably penetrates through the two strip-shaped holes; a carrier plate is fixedly mounted in the middle of the top of the mounting plate, a first servo motor is fixedly mounted at the top of the carrier plate, and a traction wheel is fixedly connected to the outer end of a transmission shaft of the first servo motor. The electromagnet generates thrust on the magnet block, so that when the push rod drives the brake block to stretch out for braking, the pressure sensor can be used for feeding back the pressure during braking, and therefore when the brake block is abraded and the brake pressure is insufficient, the servo motor can be automatically started to drive the screw to rotate to drive the movable rod to move outwards; therefore, the brake block can achieve position covering, and the press-fit friction effect of the abraded brake block and the inner wall of the fixing shell can be improved.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, specifically to a bidirectional drive elevator car and its direction switching control device. Background Technology

[0002] The elevator car is the core component of the elevator system that directly carries passengers or goods. Its design, manufacturing, and safety performance directly affect the overall operating quality of the elevator. The car consists of an upper beam, vertical beams, and a lower beam, which form the skeleton of the car and bear the main load. The materials are usually high-strength steel or aluminum alloy, and must meet the requirements for resistance to deformation and fatigue.

[0003] In actual operation, existing elevator cars are raised and lowered by traction, thus achieving bidirectional drive. The current elevator car lifting control device mainly consists of a motor, traction sheave, wire rope, and counterweight. The two ends of the wire rope are connected to the car and the counterweight, respectively. The wire rope passes through the traction sheave, and the servo motor drives the traction sheave to rotate, thereby moving the wire rope and lifting the car. When stopping, a braking assembly is needed. However, the current braking assembly uses brake blocks to brake, but when the brake blocks wear out, it is not easy to replace them, which affects the braking effect.

[0004] Therefore, a new technical solution needs to be designed to address this issue. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional drive elevator car and its direction switching control device, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bidirectional drive elevator car, including a car body, a steel wire rope connected to the top of the car body, an mounting plate provided on the upper side of the car body, and strip-shaped holes opened on both sides of the surface of the mounting plate, through which the steel wire rope moves.

[0007] A carrier plate is fixedly installed at the top center of the mounting plate. A first servo motor is fixedly installed on the top of the carrier plate. A traction sheave is fixedly connected to the outer end of the drive shaft of the first servo motor. The wire rope is wound around the traction sheave. A support plate is fixedly installed on one side of the top of the carrier plate. A fixed shell is fixedly connected to the inner side wall of the support plate. A rotating shaft is fixedly connected to one end of the traction sheave. The rotating shaft passes through the inner cavity of the fixed shell and a fixed sleeve is fixedly fitted on its outer wall. Self-adjusting brake assemblies are connected to all four sides of the outer wall of the fixed sleeve.

[0008] By adopting the above technical solution, the first servo motor can drive the traction sheave to rotate, thereby driving the wire rope to move. Under the action of the counterweight, the box can be raised and lowered stably. When the box needs to stop, the self-adjusting brake assembly can brake, thereby stopping the box. When the self-adjusting brake assembly wears out, it can automatically adjust and compensate for wear, thus ensuring the braking effect and avoiding the impact of brake component wear on the stopping effect.

[0009] In a preferred embodiment of the present invention, the self-adjusting brake assembly includes a sleeve fixed to a fixed sleeve. A suitable push rod is inserted into the inner cavity of the sleeve, and a brake block is connected to the outer end of the push rod. An electromagnet is fixedly installed on the inner end face of the sleeve, and a magnet is fixedly connected to the inner end of the push rod. The push rod is a hollow structure, and a suitable square movable rod is inserted into the inner cavity of the push rod. A second servo motor is fixedly installed on the inner end face of the push rod, and a screw is fixedly connected to the outer end of the drive shaft of the second servo motor. The outer end of the screw is inserted into a threaded hole on the end face of the movable rod and is threadedly engaged. The outer end of the movable rod is connected to the brake block.

[0010] By adopting the above technical solution, the electromagnet, when energized, generates a thrust on the magnetic block, which in turn pushes the push rod outward. This pushes the brake block against the inner wall of the fixed housing for friction braking. When the brake block wears down, the thrust generated by the electromagnet causes insufficient pressure when the brake block presses against the inner wall of the fixed housing. The second servo motor drives the screw to rotate, which in turn drives the movable rod outward. This movable rod then moves the brake block outward, allowing the brake block to fill the gap and achieve self-adjustment, thus ensuring the braking effect.

[0011] In a preferred embodiment of the present invention, the inner walls of the sleeve are provided with limiting grooves, the inner cavities of the limiting grooves are fitted with matching limiting sliders, one side wall of the limiting slider is fixedly connected with a spring, the outer end of the spring is fixedly connected to the inner wall of the limiting groove, and the outer wall of the limiting slider is fixedly connected to a push rod.

[0012] By adopting the above technical solution, when the electromagnet moves the magnet block outward, the push rod can drive the limit slider to move, thereby stretching the spring. After the electromagnet is de-energized, the spring will pull the limit slider, thereby enabling the push rod and brake block to reset.

[0013] In a preferred embodiment of the present invention, the outer end of the movable rod is provided with a slot, a pressure sensor is fixedly installed in the inner cavity of the slot, and an insert is fixedly connected to the inner arc surface of the brake block. The insert is inserted into the slot and fixedly connected to the pressure sensor.

[0014] By adopting the above technical solution, when the brake block is moved outward by the movable rod to fill the gap, the brake block can be pressed against the inner wall of the fixed housing, thereby the insert block applies pressure to the pressure sensor, thereby monitoring the pressure value, thus enabling the monitoring of the pressure effect of the brake block and the inner wall of the fixed housing, which helps to ensure the braking effect.

[0015] In a preferred embodiment of the present invention, an electric slip ring is fixedly installed on the outer wall of the support plate, and the electric slip ring is positioned directly opposite the rotating shaft.

[0016] By adopting the above technical solution and setting up the electric slip ring, the wiring can be routed along the rotating shaft, thereby enabling the electrical equipment inside the fixed housing to be rotated and supplied with power, which helps to ensure the normal operation of the mechanism inside the fixed housing.

[0017] In a preferred embodiment of the present invention, a high-precision distance sensor is fixedly installed on the inner end face of the movable rod.

[0018] By adopting the above technical solution, the movement distance of the movable rod is monitored by a high-precision distance sensor, which can provide real-time feedback on the replacement distance after the brake pads wear out. This allows for real-time monitoring of the wear degree of the brake pads, and can remind staff to replace them in time when the brake pads wear to a certain extent, thus improving the timeliness of brake pad replacement.

[0019] In a preferred embodiment of the present invention, guide wheels are rotatably mounted on both sides of the bottom of the mounting plate, and the steel wire rope is attached to the guide wheels.

[0020] By adopting the above technical solution, the guide wheel can be used to guide the wire rope and ensure the stable operation of the wire rope.

[0021] In a preferred embodiment of the present invention, an air inlet fan and an air outlet fan are fixedly connected to the top two sides of the box body, respectively.

[0022] By adopting the above technical solution, the installation of the air intake fan and the air outlet fan enables ventilation of the inner cavity of the elevator box, thereby improving the comfort of riding the elevator.

[0023] In a preferred embodiment of the present invention, mounting holes are provided at the four corners of the top of the mounting plate.

[0024] The present invention also relates to a bidirectional drive elevator car direction switching control device, including an industrial control computer and electronic buttons. The industrial control computer is fixedly installed on the top of the mounting plate, and the electronic buttons are fixedly installed on the inner wall of the car body. The signal output terminal of the electronic buttons is connected to the signal input terminal of the industrial control computer.

[0025] Specifically, the signal output terminals of the pressure sensor and the high-precision distance sensor are connected to the signal input terminal of the industrial control computer. The signal output terminal of the industrial control computer is connected to the signal input terminals of the electromagnet, the first servo motor, and the second servo motor. The industrial control computer controls the first servo motor to rotate forward and backward, thereby enabling the automated control box to switch the running direction.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] This invention uses an electromagnet to generate a pushing force on a magnetic block, causing a push rod to extend a brake block for braking. A pressure sensor can provide feedback on the braking pressure, so that when the brake block wears and the braking pressure is insufficient, a servo motor can be automatically started to drive the screw to rotate and drive the movable rod to move outward, thereby enabling the brake block to compensate for the wear. This is beneficial to improving the pressing and friction effect between the worn brake block and the inner wall of the fixed shell, thus ensuring the braking effect and ultimately ensuring the safety of the elevator.

[0028] The servo motor drives the screw to rotate, which in turn moves the movable rod. This ensures that the brake block can be positioned correctly and can also be moved back when the brake block is worn out. This makes disassembly and assembly convenient and quick, and improves the ease of replacement operations.

[0029] By monitoring the movement distance of the movable rod using a high-precision distance sensor, the distance of the brake pad replacement after wear can be fed back in real time. This allows for real-time monitoring of the wear degree of the brake pads, and can remind staff to replace them in time when the brake pads wear to a certain extent, thus improving the timeliness of brake pad replacement. Attached Figure Description

[0030] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of a bidirectional drive elevator car and its direction switching control device according to the present invention.

[0032] Figure 2 This is a side view of a bidirectional drive elevator car and its direction switching control device according to the present invention.

[0033] Figure 3 This is a schematic diagram of the fixed shell inner cavity structure of a bidirectional drive elevator car and its direction switching control device according to the present invention.

[0034] Figure 4 This is a schematic diagram of the brake assembly structure of a bidirectional drive elevator car and its direction switching control device according to the present invention.

[0035] Figure 5 This is an enlarged structural schematic diagram of A, which is a bidirectional drive elevator car and its direction switching control device according to the present invention.

[0036] In the picture:

[0037] 1. Mounting plate; 11. Mounting holes; 12. Strip holes;

[0038] 2. Carrier plate; 21. First servo motor; 22. Support plate; 23. Electric slip ring; 24. Housing; 25. Steel wire rope; 26. Traction sheave; 27. Counterweight; 28. Electronic button; 29. ​​Guide wheel;

[0039] 3. Fixed housing; 31. Rotating shaft; 32. Fixed sleeve; 33. Sleeve; 34. Push rod; 35. Brake block; 36. Electromagnet; 37. Magnetic block; 38. Limiting slider; 39. Spring;

[0040] 4. Movable rod; 41. Second servo motor; 42. Screw; 43. Pressure sensor; 44. Insert block;

[0041] 5. Industrial control computer. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The model numbers of the electrical appliances provided in this invention are for reference only, and different models of electrical appliances with the same function can be replaced according to actual usage.

[0045] Please see Figure 1-5The present invention provides a technical solution: a bidirectional drive elevator car, including a car body 24, a steel wire rope 25 connected to the top of the car body 24, an installation plate 1 provided on the upper side of the car body 24, and strip holes 12 opened on both sides of the surface of the installation plate 1, through which the steel wire rope 25 moves.

[0046] A carrier plate 2 is fixedly installed at the top center of the mounting plate 1. A first servo motor 21 is fixedly installed on the top of the carrier plate 2. A traction sheave 26 is fixedly connected to the outer end of the drive shaft of the first servo motor 21. A steel wire rope 25 is wound around the traction sheave 26. A support plate 22 is fixedly installed on one side of the top of the carrier plate 2. A fixed housing 3 is fixedly connected to the inner wall of the support plate 22. A rotating shaft 31 is fixedly connected to one end of the traction sheave 26. The rotating shaft 31 passes through the inner cavity of the fixed housing 3 and a fixed sleeve 32 is fixedly fitted on its outer wall. Self-adjusting brake assemblies are connected to all four sides of the outer wall of the fixed sleeve 32.

[0047] It should be understood that in actual use, the first servo motor 21 first drives the traction sheave 26 to rotate, thereby driving the wire rope 25 to move. Under the action of the counterweight 27, the box 24 can be raised and lowered stably. When the box 24 needs to stop, the self-adjusting brake assembly can brake, thereby stopping the box 24. When the self-adjusting brake assembly wears, it can automatically adjust and automatically compensate for wear, thereby ensuring the braking effect and helping to avoid the braking effect being affected by wear of the brake components.

[0048] Furthermore, mounting holes 11 are provided at the four corners of the top of the mounting plate 1. The mounting holes 11 facilitate the connection and fixation of the mounting plate 1 and the wellbore.

[0049] Furthermore, an air inlet fan and an air outlet fan are fixedly connected to the top two sides of the enclosure 24, respectively. The installation of the air inlet fan and the air outlet fan enables ventilation of the interior cavity of the enclosure 24, improving the comfort of riding the elevator.

[0050] It is worth mentioning that guide wheels 29 are rotatably mounted on both sides of the bottom of the mounting plate 1. The wire rope 25 is attached to the guide wheels 29. The guide wheels 29 can guide the wire rope 25 and ensure the stable operation of the wire rope 25.

[0051] like Figure 1 and 3As shown in Figures 4 and 5; the self-adjusting brake assembly includes a sleeve 33, which is fixed to a fixed sleeve 32. A suitable push rod 34 is inserted into the inner cavity of the sleeve 33. A brake block 35 is connected to the outer end of the push rod 34. An electromagnet 36 is fixedly installed on the inner end face of the sleeve 33. A magnet block 37 is fixedly connected to the inner end of the push rod 34. The push rod 34 is a hollow structure. A suitable square movable rod 4 is inserted into the inner cavity of the push rod 34. A second servo motor 41 is fixedly installed on the inner end face of the push rod 34. A screw 42 is fixedly connected to the outer end of the drive shaft of the second servo motor 41. The outer end of the screw 42 is inserted into a threaded hole on the end face of the movable rod 4 and the threads engage. The outer end of the movable rod 4 is connected to the brake block 35.

[0052] It should be understood that energizing the electromagnet 36 generates a thrust on the magnet block 37, which pushes the push rod 34 outward, thereby pushing the brake block 35 to adhere to the inner wall of the fixed shell 3 for friction braking. When the brake block 35 wears down, the thrust generated by the electromagnet 36 causes insufficient pressure when the brake block 35 presses against the inner wall of the fixed shell 3. The second servo motor 41 drives the screw 42 to rotate, which in turn drives the movable rod 4 outward, causing the movable rod 4 to move the brake block 35 outward, thus allowing the brake block 35 to fill the gap and achieve self-adjustment, which helps to ensure the braking effect.

[0053] Furthermore, both sides of the inner cavity of the sleeve 33 are provided with limiting grooves, and a matching limiting slider 38 is inserted into the inner cavity of the limiting groove. A spring 39 is fixedly connected to one side wall of the limiting slider 38. The outer end of the spring 39 is fixedly connected to the inner wall of the limiting groove, and the outer wall of the limiting slider 38 is fixedly connected to the push rod 34.

[0054] It should be understood that in actual use, when the electromagnet 36 moves the magnet block 37 outward, the push rod 34 can drive the limit slider 38 to move, thereby stretching the spring 39. After the electromagnet 36 is de-energized, the spring 39 will pull the limit slider 38, thereby enabling the push rod 34 and the brake block 35 to reset.

[0055] Furthermore, the outer end of the movable rod 4 is provided with a slot, and a pressure sensor 43 is fixedly installed in the inner cavity of the slot. An insert 44 is fixedly connected to the inner arc surface of the brake block 35. The insert 44 is inserted into the slot and fixedly connected to the pressure sensor 43.

[0056] It should be understood that when the brake block 35 is moved outward by the movable rod 4 to fill the gap, the brake block 35 can be pressed against the inner wall of the fixed shell 3, so that the insert 44 applies pressure to the pressure sensor 43, thereby monitoring the pressure value, thus enabling the monitoring of the pressure effect of the brake block 35 and the inner wall of the fixed shell 3, which helps to ensure the braking effect.

[0057] like Figure 1 and2 As shown; an electric slip ring 23 is fixedly installed on the outer wall of the support plate 22, and the electric slip ring 23 is positioned directly opposite the rotating shaft 31;

[0058] It should be understood that by setting the slip ring 23, wiring can be routed along the rotating shaft 31, thereby enabling the electrical equipment inside the fixed shell 3 to rotate and supply power, which helps to ensure the normal operation of the mechanism inside the fixed shell 3.

[0059] like Figure 1 and 3 As shown in Figure 4, a high-precision distance sensor is fixedly installed on the inner end face of the movable rod 4.

[0060] It should be understood that by monitoring the movement distance of the movable rod through a high-precision distance sensor, the distance of the brake pad 35 after wear can be fed back in real time, thereby enabling real-time monitoring of the wear degree of the brake pad 35. This allows the staff to be reminded to replace the brake pad 35 in a timely manner when it wears to a certain extent, which helps to improve the timeliness of brake pad 35 replacement.

[0061] A bidirectional drive elevator car direction switching control device includes an industrial control computer 5 and electronic buttons 28. The industrial control computer 5 is fixedly installed on the top of the mounting plate 1, and the electronic buttons 28 are fixedly installed on the inner wall of the housing 24. The signal output terminal of the electronic buttons 28 is connected to the signal input terminal of the industrial control computer 5.

[0062] It should be understood that the signal output terminals of the pressure sensor 43 and the high-precision distance sensor are connected to the signal input terminals of the industrial control computer 5. The signal output terminal of the industrial control computer 5 is connected to the signal input terminals of the electromagnet 36, the first servo motor 21, and the second servo motor 41. The industrial control computer 5 controls the first servo motor 21 to rotate forward and backward, thereby enabling the automated control box 24 to switch its operating direction.

[0063] Furthermore, the components included in the bidirectional drive elevator car and its direction switching control device of the present invention are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching monitoring computer and power supply, are connected by wires. The electrical connection between each electrical component is completed in the order of operation. The detailed connection method is a well-known technology in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bidirectional drive elevator car, comprising a car body (24), characterized in that: The top of the box (24) is connected to a steel wire rope (25), and an installation plate (1) is provided on the upper side of the box (24). The installation plate (1) has strip holes (12) on both sides of its surface, and the steel wire rope (25) moves through the two strip holes (12). A carrier plate (2) is fixedly installed at the top center of the mounting plate (1). A first servo motor (21) is fixedly installed on the top of the carrier plate (2). A traction wheel (26) is fixedly connected to the outer end of the drive shaft of the first servo motor (21). The wire rope (25) is wound around the traction wheel (26). A support plate (22) is fixedly installed on one side of the top of the carrier plate (2). A fixed shell (3) is fixedly connected to the inner wall of the support plate (22). A rotating shaft (31) is fixedly connected to one end of the traction wheel (26). The rotating shaft (31) passes through the inner cavity of the fixed shell (3) and a fixed sleeve (32) is fixedly fitted on its outer wall. Self-adjusting brake assemblies are connected to all four sides of the outer wall of the fixed sleeve (32).

2. The bidirectional drive elevator car according to claim 1, characterized in that: The self-adjusting brake assembly includes a sleeve (33), which is fixed on a fixed sleeve (32). A suitable push rod (34) is inserted into the inner cavity of the sleeve (33). A brake block (35) is connected to the outer end of the push rod (34). An electromagnet (36) is fixedly installed on the inner end face of the sleeve (33). A magnet block (37) is fixedly connected to the inner end of the push rod (34). The push rod (34) is a hollow structure. A suitable square movable rod (4) is inserted into the inner cavity of the push rod (34). A second servo motor (41) is fixedly installed on the inner end face of the push rod (34). A screw (42) is fixedly connected to the outer end of the drive shaft of the second servo motor (41). The outer end of the screw (42) is inserted into a threaded hole on the end face of the movable rod (4) and threadedly engaged. The outer end of the movable rod (4) is connected to the brake block (35).

3. A bidirectional drive elevator car according to claim 2, characterized in that: The inner walls of the sleeve (33) are provided with limiting grooves. The inner walls of the limiting grooves are fitted with matching limiting sliders (38). A spring (39) is fixedly connected to one side wall of the limiting slider (38). The outer end of the spring (39) is fixedly connected to the inner wall of the limiting groove. The outer wall of the limiting slider (38) is fixedly connected to the push rod (34).

4. A bidirectional drive elevator car according to claim 2, characterized in that: The outer end of the movable rod (4) is provided with a slot, and a pressure sensor (43) is fixedly installed in the inner cavity of the slot. The inner arc surface of the brake block (35) is fixedly connected with a plug (44), which is inserted into the slot and fixedly connected to the pressure sensor (43).

5. A bidirectional drive elevator car according to claim 1, characterized in that: An electric slip ring (23) is fixedly installed on the outer wall of the support plate (22), and the electric slip ring (23) is positioned directly opposite the rotating shaft (31).

6. A bidirectional drive elevator car according to claim 2, characterized in that: A high-precision distance sensor is fixedly installed on the inner end face of the movable rod (4).

7. A bidirectional drive elevator car according to claim 1, characterized in that: Guide wheels (29) are rotatably mounted on both sides of the bottom of the mounting plate (1), and the wire rope (25) is attached to the guide wheels (29).

8. A bidirectional drive elevator car according to claim 1, characterized in that: The top two sides of the box (24) are respectively connected to an air inlet fan and an air outlet fan.

9. A bidirectional drive elevator car according to claim 1, characterized in that: Mounting holes (11) are provided at the four corners of the top of the mounting plate (1).

10. A direction switching control device for a bidirectional drive elevator car, applicable to the bidirectional drive elevator car according to any one of claims 1-9, characterized in that: It includes an industrial control computer (5) and an electronic button (28). The industrial control computer (5) is fixedly installed on the top of the mounting plate (1), and the electronic button (28) is fixedly installed on the inner wall of the housing (24). The signal output terminal of the electronic button (28) is connected to the signal input terminal of the industrial control computer (5).

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