Counterweight mechanism of elevator

Abstract

The utility model discloses an elevator counterweight mechanism, and relates to the field of elevator structures, the elevator counterweight mechanism comprises a transmission shell, one side of a rotating shaft of the transmission shell is connected with a torque arm used for bearing torque, one end of the torque arm far away from the transmission shell is provided with pinch roller fixing supports, and a chain wheel is rotatably arranged between the pinch roller fixing supports; a chain is meshed with the surface of the chain wheel, a meshed pressing wheel body is arranged in the middle of the chain, and a bearing seat fixed to an external structure is arranged at the bottom of the pressing wheel body. A weight box is connected to the bottom of the bearing seat, the top of the weight box is fixedly connected with the bottom of the chain, a driven shaft for transmitting rotating force is rotationally arranged on the side, located on the chain, of the top of the weight box, a plurality of balancing weights are arranged in the weight box in a pluggable mode, and a plurality of guide wheel fixing supports are fixedly arranged on the two sides of the weight box. Counterweight guide wheels are rotationally arranged in the guide wheel fixing supports. According to the balance weight mechanism, it is guaranteed that the balance weight mechanism stably moves, meanwhile, the balance weight blocks are convenient to disassemble, and therefore the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of elevator structures, and more particularly to an elevator counterweight mechanism. Background Technology

[0002] A lifting mechanism is a mechanism that uses the weight of an object to achieve lifting. It converts gravitational potential energy into kinetic energy through flexible components such as pulleys and ropes. The main function of the counterweight mechanism is to balance the torque generated by the lifting machine during the lifting process, ensuring that the equipment remains stable during operation, reducing vibration and swaying, thereby improving the stability and safety of the equipment. By adding a specific weight of counterweight to the lifting system, the balance of the entire system can be achieved during operation. In order to ensure the stability of the counterweight, existing counterweight mechanisms usually connect the housing on which the counterweight is loaded to the screw thread inside the lifting machine. This results in the need for multiple people to assist in replacing or adjusting the number of counterweights, thus increasing maintenance costs. Utility Model Content

[0003] To address the problems of difficult disassembly and adjustment and increased maintenance costs associated with conventional counterweight mechanisms, this application provides a counterweight mechanism for a lift.

[0004] The technical solution for a lifting platform counterweight mechanism provided in this application is as follows:

[0005] A counterweight mechanism for an elevator includes a transmission housing. A torque arm for bearing torque is connected to one side of the shaft of the transmission housing. A pressure wheel fixing bracket is provided at the end of the torque arm away from the transmission housing. A sprocket is rotatably arranged between the pressure wheel fixing brackets. A chain is meshed on the surface of the sprocket. A pressure wheel body is meshed in the middle of the chain. A bearing seat fixed to an external structure is provided at the bottom of the pressure wheel body.

[0006] A counterweight box is connected to the bottom of the bearing housing. The top of the counterweight box is fixed to the bottom of the chain. A passive shaft for transmitting rotational force is rotatably installed on the top of the counterweight box on one side of the chain. Multiple counterweight blocks are inserted and removed inside the counterweight box. Multiple guide wheel fixing brackets are fixed on both sides of the counterweight box. Counterweight guide wheels are rotatably installed in the multiple guide wheel fixing brackets.

[0007] By adopting the above technical solution, the sprocket rotates and drives the chain to tighten, thereby causing the counterweight box to move up and down. At the same time, the pressure roller supports the turning point located in the middle of the chain, increasing the distance between the counterweight box and the transmission housing. This ensures that the counterweight mechanism balances the torque function of the lifting machine, while the counterweight box is separated from the transmission housing, making it easier for personnel to remove and disassemble the counterweight from the counterweight box, thus facilitating maintenance and adjustment.

[0008] Preferably, a flat key is inserted into one end of the side surface of the transmission housing, and a motor body is fixed on the side of the transmission housing away from the flat key.

[0009] By adopting the above technical solution, the flat key is plugged into the mounting end of the subsequent handle, thereby connecting the transmission housing and the handle as a whole, which facilitates the subsequent adjustment of the speed and torque in the transmission housing.

[0010] Preferably, a spacer is fixedly provided on the side of the torque arm near the pressure roller fixing bracket, and a flat key is inserted into the spacer, which is then inserted and fixed to the pressure roller fixing bracket.

[0011] By adopting the above technical solution, the second flat key is inserted into the pressure roller fixing bracket, thereby improving the overall connection between the pressure roller fixing bracket and the torque arm. At the same time, the connection point between the second flat key and the pressure roller fixing bracket is covered by a spacer, thereby reducing the friction between the second flat key and the pressure roller fixing bracket and improving stability.

[0012] Preferably, a second spacer is fixedly provided on the top of the bearing housing, and a pressure roller fixing shaft is rotatably provided in the middle of the bearing housing located in the second spacer, with the surface of the pressure roller fixing shaft being fixedly connected to the pressure roller body.

[0013] By adopting the above technical solution, the pressure roller fixing shaft is connected to the pressure roller body, thereby enabling the pressure roller body and bearing seat to rotate as a whole. At the same time, the spacer sleeve covers the outer surface of the pressure roller fixing shaft, thereby reducing contact with external debris and extending its service life.

[0014] Preferably, a guide wheel pin is provided between the connection points of the multiple guide wheel fixing brackets located on the counterweight guide wheel, and a deep groove ball bearing is rotatably provided in each of the multiple guide wheel fixing brackets located in the guide wheel pin.

[0015] By adopting the above technical solution, the guide wheel pin is fixed at the connection point of the guide wheel fixing bracket, thereby providing an installation fulcrum for the rotational connection of the deep groove ball bearing, and thus ensuring the stable connection between the deep groove ball bearing and the counterweight guide wheel.

[0016] Preferably, a retaining ring for increasing fixation is provided between the deep groove ball bearing and the guide wheel pin.

[0017] By adopting the above technical solution, the retaining ring is located between the deep groove ball bearing and the guide wheel pin, thereby improving the fixing effect between the deep groove ball bearing and the guide wheel pin and preventing the deep groove ball bearing from shifting during rotation.

[0018] Preferably, a speed reducer for reducing the rotational speed is fixed at the bottom of the flat key.

[0019] By adopting the above technical solution, the gear contact surface of the reducer is keyed to the shaft of the transmission housing via a flat key, thereby reducing the high speed of the shaft to the required low speed, meeting the working requirements of the mechanical equipment, and reducing friction between components.

[0020] Preferably, a handle for control and adjustment is fixed at one end of the flat key away from the transmission housing.

[0021] By adopting the above technical solution, the gears, shafts and other structures inside the transmission housing can be adjusted by rotating the handle, and the transmission housing can also be braked in an emergency to stop rotation.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The chain is tightened by using a sprocket, and the chain extends vertically downwards with the pressure roller as the fulcrum. This tightening of the chain causes the counterweight box to move upwards. At the same time, the transmission housing can be adjusted remotely and manually via a reducer and a handle. While maintaining the operation of the counterweight mechanism, the counterweight box and transmission housing are separated, allowing personnel to directly insert or remove counterweights to adjust the weight of the counterweight box. This avoids the problem of disassembly requiring multiple people and reduces maintenance costs. Attached Figure Description

[0024] Figure 1 This is a front view of this application;

[0025] Figure 2 This is a structural diagram of the counterweight box in this application;

[0026] Figure 3 This is a top view of this application;

[0027] Figure 4 This is a left view of the transmission housing of this application.

[0028] Reference numerals in the attached drawings: 1. Transmission housing; 2. Key 1; 3. Key 2; 4. Sprocket; 5. Driven shaft; 6. Torque arm; 7. Counterweight box; 8. Counterweight block; 9. Counterweight guide wheel; 10. Guide wheel pin;

[0029] 11. Guide wheel fixing bracket; 12. Spacer sleeve one; 13. Pressure wheel fixing bracket; 14. Pressure wheel body; 15. Spacer sleeve two; 16. Pressure wheel fixing shaft;

[0030] 17. Handle; 18. Bearing housing; 19. Deep groove ball bearing; 20. Snap ring for bore; 21. Reducer; 22. Motor body; 23. Chain. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0032] This application discloses a counterweight mechanism for an elevator.

[0033] Reference Figure 1, Figure 3 , Figure 4 A counterweight mechanism for a lift includes a transmission housing 1. A rotating shaft is laterally rotatable at the center of the transmission housing 1. The surface of the rotating shaft is provided with a worm gear, worm, or other transmission structure. A motor body 22 is fixedly mounted on the outer surface of the transmission housing 1 at the end of the transmission structure away from the rotating shaft. The output shaft of the motor body 22 is connected to the transmission structure. Meanwhile, a reducer 21 is fixedly mounted at the bottom of the transmission housing 1. A flat key 2 is keyed to the tooth contact surface of the reducer 21. The end of the flat key 2 away from the reducer 21 is inserted and fixed to the transmission structure inside the transmission housing 1. A force handle 17 for adjusting torque is fixedly mounted on the other end of the flat key 2 relative to the transmission housing 1.

[0034] It should be noted that a torque arm 6 extends from the transmission housing 1 to one end of the rotating shaft. The torque arm 6 is connected to the other end of the transmission housing 1. The torque arm 6 for bearing torque is connected to one side of the rotating shaft of the transmission housing 1. A pressure roller fixing bracket 13 is fixed to the end of the torque arm 6 away from the transmission housing 1. At the same time, a spacer 12 is provided at the connection between the torque arm 6 and the pressure roller fixing bracket 13. Two fixing plates are provided extending outward from one side of the middle of the pressure roller fixing bracket 13. Multiple flat keys 2 3 are inserted and fixed between the two fixing plates. A sprocket 4 is inserted and fixed on the surface of each of the multiple flat keys 2 3. The sprocket 4 can rotate laterally.

[0035] The output shaft of the motor body 22 rotates, and the transmission structure reverses the lateral rotation to a vertical direction, thereby rotating the shaft in the middle of the transmission housing 1. This drives the torque arm 6 to rotate, and the torque arm 6 is connected to the key 3, thereby driving the sprocket 4 to rotate synchronously, thus completing the power transmission. By adjusting the reducer 21, the tooth contact surface of the reducer 21 is made to abut against the shaft of the transmission housing 1, thereby reducing the speed of the shaft. At the same time, the operator can manually adjust the shaft by turning the handle 17 to achieve the functions of speed reduction and emergency stop.

[0036] Reference Figure 1 , Figure 2 , Figure 4Multiple sprockets 4 are fitted with meshing chains 23. The chain 23 extends laterally away from the sprocket 4, and a meshing pressure roller body 14 is fitted at the end of the laterally extended chain. A pressure roller fixing shaft 16 is fixedly connected to the middle of the pressure roller body 14. Bearing seats 18 are connected to both ends of the pressure roller fixing shaft 16. The bearing seats 18 are fixedly connected to the external wall. At the same time, mounting plates are fixedly extended from both ends of the bearing seats 18 at the pressure roller fixing shaft 16. The mounting plates are used to rotatably connect with the pressure roller fixing shaft 16. A second spacer 15 is provided at the connection between the pressure roller fixing shaft 16 and the mounting plate. Both the first spacer 12 and the second spacer 15 are made of nylon. The chain 23 extends downward from the pressure roller body 14 and a counterweight box 7 is fixedly connected to the end. A passive shaft 5 is rotatably mounted on the top of the counterweight box 7 on one side of the chain 23. The surface of the passive shaft 5 abuts against the chain 23.

[0037] It should be noted that multiple counterweight blocks 8 are movably inserted into the counterweight box 7 (the number of counterweight blocks 8 is adjusted according to the actual weight ratio). Guide wheel fixing brackets 11 are provided on both sides of the outer surface of the counterweight box 7, extending outward. Guide wheel pins 10 are fixed in the guide wheel fixing brackets 11. Deep groove ball bearings 19 are inserted into the guide wheel pins 10. Counterweight guide wheels 9 are fixed around the surface of the deep groove ball bearings 19. Slide rails are provided between the hubs on opposite sides of the four counterweight guide wheels 9. A retaining ring 20 is inserted and fixed at the connection point between the deep groove ball bearings 19 and the guide wheel pins 10 to improve the tightness of the connection of the deep groove ball bearings 19.

[0038] The chain 23 tightens, pulling the counterweight box 7 and causing it to move upward. When the counterweight box 7 moves, the middle of the chain 23 is supported by the pressure roller body 14, thus forming a 90° turn. This causes the sprocket 4, pressure roller body 14, and counterweight box 7 to be arranged in a triangular shape, thereby separating the counterweight box 7 from the transmission housing 1. The counterweight block 8 is inserted into the counterweight box 7. The movable counterweight block 8 can be removed from the counterweight box 7, thereby adjusting the weight of the counterweight box 7 for easy maintenance. At the same time, when the counterweight box 7 moves upward, the slide rails on both sides abut against the counterweight guide wheel 9, thereby limiting the movement of the counterweight box 7 and effectively maintaining its stability.

[0039] The device also includes the transmission structure in the transmission housing 1, the connection method of the first flat key 2 and the second flat key 3, the reducer 21, the motor body 22 and the microcomputer, all of which are existing technologies. Their structural principles will not be described in detail. The reducer 21 is set as a worm gear reducer NRV110-Y2200-speed ratio 20-B14.

[0040] The implementation principle of the lifting platform counterweight mechanism in this application embodiment is as follows: When using this device, the operator controls the motor body 22 to run via a microcomputer. The output shaft inside the motor body 22 rotates, thereby driving the transmission structure inside the transmission housing 1. At the same time, the rotating shaft in the middle of the transmission housing 1 rotates, which drives the torque arm 6 to rotate the sprocket 4. The rotation of the sprocket 4 causes the chain 23 on the surface of the sprocket 4 to tighten. As the chain 23 tightens, it drives the counterweight box 7 at the bottom of the chain 23 to move synchronously. At the same time, the middle of the chain 23 abuts against the pressure roller body 14, thereby turning downwards by 90°, so that the counterweight box 7 moves upwards as a whole. As the counterweight box 7 moves, the four counterweight guide wheels 9 abut against and slide against the external slide rails, thereby forming a clamping limit on the counterweight box 7 by the two slide rails, ensuring the stability of the counterweight box 7 when it moves.

[0041] Meanwhile, the operator controls the contact degree between the gear contact surface of the reducer 21 and the shaft of the transmission housing 1 through the microcomputer, thereby reducing the rotation speed of the shaft, making the shaft torque compatible with the rest of the transmission structure, reducing shaft wear and extending service life. The operator can also manually control the handle 17 to rotate, thereby adjusting the shaft torque or stopping the shaft in an emergency, forming a double safety function.

[0042] When the elevator stops running, personnel can directly reach into the counterweight box 7 to remove the internal counterweight block 8, thereby changing the overall weight of the counterweight box 7. Since the counterweight box 7 is separated from the transmission housing 1, the requirement for multiple people to cooperate in disassembling the counterweight block 8 is eliminated, and a single person can operate it, thereby reducing maintenance costs.

[0043] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A counterweight mechanism for a lift, characterized in that: The system includes a transmission housing (1), a torque arm (6) for bearing torque is connected to one side of the shaft of the transmission housing (1), a pressure wheel fixing bracket (13) is provided at the end of the torque arm (6) away from the transmission housing (1), a sprocket (4) is rotatably arranged between the pressure wheel fixing brackets (13), a chain (23) is meshed on the surface of the sprocket (4), a pressure wheel body (14) is meshed in the middle of the chain (23), and a bearing seat (18) fixed to the external structure is provided at the bottom of the pressure wheel body (14). A counterweight box (7) is connected to the bottom of the bearing seat (18). The top of the counterweight box (7) is fixed to the bottom of the chain (23). A passive shaft (5) for transmitting rotational force is rotatably arranged on one side of the chain at the top of the counterweight box (7). Multiple counterweight blocks (8) are inserted and removed inside the counterweight box (7). Multiple guide wheel fixing brackets (11) are fixed on both sides of the counterweight box (7). A counterweight guide wheel (9) is rotatably arranged inside each of the multiple guide wheel fixing brackets (11).

2. The counterweight mechanism for a lifting platform according to claim 1, characterized in that: A flat key (2) is inserted into one end of the side surface of the transmission housing (1), and a motor body (22) is fixed on the side of the transmission housing (1) away from the flat key (2).

3. The counterweight mechanism for a lifting platform according to claim 1, characterized in that: The torque arm (6) is fixedly provided with a spacer sleeve (12) on the side near the pressure roller fixing bracket (13). A flat key (3) is inserted into the spacer sleeve (12) and is fixedly inserted into the pressure roller fixing bracket (13).

4. The counterweight mechanism for a lifting platform according to claim 1, characterized in that: The bearing seat (18) is fixedly provided with a second spacer (15) at the top. The bearing seat (18) is rotatably provided with a pressure roller fixing shaft (16) in the middle of the second spacer (15). The surface of the pressure roller fixing shaft (16) is fixedly connected to the pressure roller body (14).

5. The counterweight mechanism for a lifting platform according to claim 1, characterized in that: Multiple guide wheel fixing brackets (11) are connected by guide wheel pins (10) at the connection points of the counterweight guide wheel (9), and multiple guide wheel fixing brackets (11) are rotatably provided with deep groove ball bearings (19) within the guide wheel pins (10).

6. The counterweight mechanism for a lifting platform according to claim 5, characterized in that: A retaining ring (20) for increasing fixation is provided between the deep groove ball bearing (19) and the guide wheel pin (10).

7. The counterweight mechanism for a lifting platform according to claim 2, characterized in that: The bottom of the flat key (2) is fixed with a speed reducer (21) for reducing the rotational speed.

8. The counterweight mechanism for a lifting platform according to claim 2, characterized in that: The flat key (2) is fixed with a handle (17) for control and adjustment at the end away from the transmission housing (1).

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