Construction elevator driven by double motors

Abstract

The invention discloses a construction elevator driven by double motors, and relates to the technical field of elevators, the construction elevator driven by the double motors comprises a chassis, a standard knot and a lift car in sliding connection, a driving mechanism is installed between the lift car and the standard knot, and a double-shaft driving mechanism and an anti-falling mechanism are arranged between the lift car and the standard knot; the anti-falling mechanism comprises a positioning box fixed with the lift car; the driving shaft penetrates through the positioning box; the transmission block can be switched between a coaxial state and an eccentric state; a brake ring is arranged in the positioning box; when the rotating speed of the driving shaft exceeds a threshold value, friction braking is generated between the transmission block and the brake ring; in the falling process of the lift car, the falling speed of the lift car can be slowed down and locked.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a construction elevator driven by dual motors. Background Art

[0002] At present, most high-rise buildings use construction elevators as vertical transportation tools for personnel and materials during the decoration and renovation stage of construction projects. Construction elevators are usually called construction hoists, but the definition of construction hoists is broader. Construction platforms also belong to the construction elevator series. A simple construction elevator is composed of a car, drive mechanism, standard section, attached wall, chassis, fence, electrical system and other parts. It is a manned and cargo construction machinery frequently used in construction.

[0003] When an existing construction elevator falls due to a failure in the braking mechanism or overload, the buffer mechanism can only provide buffering when the elevator reaches the critical sliding value. However, the gravitational potential energy of the elevator car is very large at this time, and the anti-fall device is not triggered when the elevator starts to slide. In this way, when the elevator falls, construction accidents and casualties are likely to occur, which is not conducive to the safe progress of construction work.

[0004] Therefore, it is necessary to design a construction elevator driven by dual motors to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a construction elevator driven by dual motors, which can effectively solve the technical problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a construction elevator driven by dual motors, comprising a chassis, a standard section and a slidingly connected car, a driving mechanism is installed between the car and the standard section, a dual-axis driving mechanism and an anti-falling mechanism are provided between the car and the standard section, and the anti-falling mechanism comprises: a positioning box fixed to the car; A driving shaft passing through the positioning box and a transmission block capable of switching between a coaxial state and an eccentric state; A brake ring is arranged in the positioning box. When the rotation speed of the driving shaft exceeds a threshold value, friction braking is generated between the transmission block and the brake ring.

[0007] Preferably, the anti-falling mechanism comprises an elastic connection structure on the driving shaft, which is composed of a guide groove, a sliding connection rod and a first elastic member.

[0008] Preferably, a counterweight structure is added to the transmission block, which includes a clearance groove and a mass block. The mass of the mass block is greater than the mass of the transmission block, and the gravity of the mass block is less than the pulling force of the first elastic member.

[0009] Preferably, the brake ring is connected to the positioning box via a sliding guide structure, and the sliding guide structure comprises a sliding block, a sliding groove and a buffer assembly with a second elastic member.

[0010] Preferably, the sliding guide structure comprises a guide rod arranged on the side of the sliding block, and the guide rod is sleeved through the second elastic member and is limited in the sliding groove.

[0011] Preferably, the driving mechanism comprises driving motors on two cars, and output ends of the driving motors are fixedly connected to the corresponding driving shafts.

[0012] Preferably, a rack is fixed to one side of the standard section close to the car, and a gear meshing with the rack is fixed to one end of the drive shaft close to the standard section.

[0013] Preferably, a braking mechanism is provided between the standard section and the car for braking the car when it slides.

[0014] Preferably, an electrical system is provided between the standard section and the car for controlling the lifting, starting and stopping of the car.

[0015] Preferably, a fence is installed on the outside of the chassis.

[0016] Technical effects and advantages of the present invention: 1. The present invention not only ensures that the transmission block and the drive shaft rotate coaxially within the rotation speed threshold of the drive shaft through the transmission block, guide groove, drive shaft, connecting rod and mass block, but also after the rotation speed of the drive shaft exceeds the set threshold, the centrifugal force generated by the drive shaft and the combined force of the mass block overcome the pulling force of the first elastic member, under the action of the guide groove, the transmission block and the drive shaft are transformed into an eccentrically connected state, so that the transmission block drives the mass block to contact with the brake ring, and due to the large mass of the mass block, a large friction force is generated after the brake ring and the mass block contact, thereby preventing the rotation speed of the drive shaft from increasing, and when the brake mechanism fails, the drive shaft can be braked in time, thereby avoiding the continuous falling of the car and improving the safety of the elevator during construction.

[0017] 2. The present invention provides a rotatable brake ring, a slider and a second elastic member. Not only can the mass block drive the brake ring to rotate synchronously along the positioning box at the moment when the mass block impacts the brake ring, and convert a part of the impact force into the power for the rotation of the brake ring, but also overcome the elastic force of the second elastic member for further buffering, thereby reducing the influence of the mass block on the brake ring, further ensuring the stability of the interaction between the brake ring and the mass block, thereby ensuring that the brake ring and the mass block work normally when the car falls, and avoiding the continuous falling of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the car and the driving mechanism of the present invention; Figure 3 It is a schematic diagram of the structure of the drive shaft and the positioning box of the present invention; Figure 4 It is a structural cross-sectional view of the positioning box of the present invention; Figure 5 It is a schematic diagram of the explosion structure of the transmission block and the drive shaft of the present invention; Figure 6 It is a schematic diagram of the coaxial state of the transmission block and the driving shaft of the present invention; Figure 7 It is a schematic diagram of the eccentric state of the transmission block and the drive shaft of the present invention; In the figure: 1. chassis; 2. standard section; 3. car; 4. Driving mechanism; 401. Driving shaft; 402. Driving motor; 403. Rack; 404. Gear; 5. Anti-fall mechanism; 501. Positioning box; 502. Transmission block; 503. Braking ring; 504. Guide groove; 505. Connecting rod; 506. First elastic member; 507. Giving way groove; 508. Mass block; 509. Sliding block; 510. Sliding groove; 511. Guide rod; 512. Second elastic member; 6. Braking mechanism; 7. Electrical system; 8. Fence. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1 like Figure 1 and Figure 2 As shown, this embodiment provides a dual-motor driven construction elevator, including a chassis 1 and a standard section 2, a car 3 is slidably connected to the standard section 2, a driving mechanism 4 is installed between the car 3 and the standard section 2, and is used to drive the car 3 to slide along the standard section 2, the driving mechanism 4 includes two driving shafts 401 rotatably connected to the car 3, and also includes: the driving mechanism 4 includes two driving motors 402 fixedly connected to the car 3, the output end of the driving motor 402 is fixedly connected to the corresponding driving shaft 401, a vertically extending rack 403 is fixedly connected to the side of the standard section 2 close to the car 3, and a gear 404 meshing with the rack 403 is fixedly connected to the end of the driving shaft 401 close to the standard section 2.

[0021] A braking mechanism 6 is provided between the standard section 2 and the car 3 for braking the car 3 when it slides. An electrical system 7 is provided between the standard section 2 and the car 3 for controlling the lifting, starting and stopping of the car 3. A fence 8 is installed on the outside of the chassis 1.

[0022] In actual use, firstly, the electrical system 7 is used to control the two drive motors 402 to rotate synchronously at a uniform speed, and the connection mode and control method between the electrical system 7, the brake mechanism 6 and the drive motor 402 are all existing technologies, and the specific structure and control method are not repeated here; when the elevator goes up, the drive motor 402 drives the gear 404 to move on the rack 403 through the reducer and the drive shaft 401. It should be noted that the rack 403 is a double-sided rack, and two drive motors 402 can be used to drive the gears 404 located on both sides of the rack 403 through the drive shaft 401 and mesh with the rack 403, so that under the action of the two gears 404 and the two drive motors 402, the car 3 slides upward along the standard section 2; considering that the weight of the carried object is different, the required driving force is also different, and two drive motors 402 can also be set, each The driving motor 402 can simultaneously drive the two driving shafts 401 to rotate through a corresponding reducer, and the two driving shafts respectively drive the two gears 404 to rotate, and the two gears 404 are respectively driven from both sides of the rack 403 to output driving force; when the weight of the carried object is large and a large driving force is required, the two driving motors 402 can be turned on, and the rack 403 can be driven through four gears 404 to provide a large driving force; and when the weight of the carried object is relatively small, only one of the driving motors 402 needs to be selectively started, and the two driving shafts 401 can be simultaneously driven to rotate through the corresponding reducer, and the two driving shafts respectively drive the two gears 404 to rotate, and the two gears 404 are respectively driven from both sides of the rack 403 to output driving force; in this way, the driving force can be adjusted according to the total amount of the carried object to achieve the effect of energy saving and consumption reduction.

[0023] At the same time, under the action of the braking mechanism 6, the car 3 can be braked at any floor, which is convenient for the staff to carry out construction work through the car 3. When the elevator goes down, the two drive motors 402 are controlled by the electrical system 7 to rotate in the opposite direction, so that the car 3 slides downward along the standard section 2. The two drive motors 402 are set, which can not only ensure the power of the car 3, but also avoid the problem of the elevator being unusable when one of the drive motors 402 fails, thereby ensuring the stable operation of the construction work.

[0024] Embodiment 2 During use, when the braking mechanism 6 fails during the operation of the elevator, resulting in the failure of the braking effect, the car 3 cannot be stably maintained at a stable height and falls. In addition, the buffer mechanism of current elevators often only performs buffering when the elevator slides to a critical level, and the anti-fall device is not triggered when the elevator starts to slide. In this way, when the elevator falls, construction accidents and casualties are prone to occur. Therefore, further improvements are made based on the above embodiments.

[0025] like Figures 3 to 7 As shown, the anti-fall mechanism 5 is fixedly arranged on the car 3 and is rotatably connected to the driving mechanism 4. The anti-fall mechanism 5 includes a positioning box 501 fixedly connected to the car 3, the driving shaft 401 passes through the positioning box 501 and is rotatably connected to the positioning box 501, the driving shaft 401 is provided with a transmission block 502 which can be coaxially or eccentrically connected thereto and is located in the positioning box 501, and the positioning box 501 is provided with a rotatable brake ring 503. When the rotation speed of the driving shaft 401 exceeds a predetermined value, the transmission block 502 contacts the inner edge surface of the brake ring 503.

[0026] The anti-fall mechanism 5 includes a guide groove 504 opened on the transmission block 502, the driving shaft 401 is located in the guide groove 504, and a connecting rod 505 is slidably connected to the driving shaft 401. The end of the connecting rod 505 away from the driving shaft 401 is fixedly connected to the transmission block 502, and the end of the connecting rod 505 close to the driving shaft 401 is connected to the driving shaft 401 through a first elastic member 506. A yield groove 507 is opened on the transmission block 502, and the yield groove 507 and the guide groove 504 are in the same straight line. A mass block 508 is fixedly connected in the yield groove 507, and the mass of the mass block 508 is greater than the mass of the transmission block 502, and the gravity of the mass block 508 is less than the pulling force of the first elastic member 506.

[0027] In actual use, when the braking mechanism 6 fails and the car 3 falls, the gear 404 drives the drive shaft 401 to rotate rapidly under the action of the rack 403 and the gravity of the car 3 itself, and the drive shaft 401 drives the transmission block 502 to rotate. When the rotation speed of the drive shaft 401 does not reach the threshold, the drive shaft 401 drives the transmission block 502 to rotate coaxially through the connecting rod 505. When the rotation speed of the drive shaft 401 exceeds the threshold and continues to increase, the centrifugal force (i.e., the rotational inertia force) generated by the rotation of the drive shaft 401, and the combined force of the centrifugal force and the gravity of the mass block 508 is greater than the pulling force of the first elastic member 506. At this time, under the action of the centrifugal force, the mass block 508 overcomes the pulling force of the first elastic member 506 and drives the connecting rod 505 to slide in the direction away from the drive shaft 401, so that the first elastic member 506 is stretched, and the connecting rod 505 drives the transmission block 502 to slide in the direction of the brake ring 503.

[0028] The driving shaft 401 slides to the other side of the guide groove 504, and the driving shaft 401 is eccentrically connected to the transmission block 502. At the same time, the transmission block 502 drives the mass block 508 to contact the inner edge surface of the brake ring 503. Since the weight of the mass block 508 is very large and the inertial force generated is also very large, a large friction force can be generated after the mass block 508 contacts the brake ring 503, and the generated friction force can slow down the rotation speed of the driving shaft 401, thereby reducing the falling rate of the car 3, avoiding the continuous falling of the car 3, and thus avoiding the occurrence of construction accidents. When the car 3 no longer falls, the gear 404 drives the rotation speed of the driving shaft 401 to gradually slow down to within the threshold range. At this time, the mass block 508 gradually reduces the contact force with the brake ring 503, so that the friction between the mass block 508 and the brake ring 503 is reduced.

[0029] At the same time, the centrifugal force generated by the reduced speed of the driving shaft 401 is reduced. When the combined force of the centrifugal force and the mass block 508 is not enough to overcome the pulling force of the first elastic member 506, under the action of the first elastic member 506, the first elastic member 506 drives the connecting rod 505 to slide in the direction of the driving shaft 401, and the connecting rod 505 drives the transmission block 502 to slide again through the guide groove 504 to a state coaxial with the driving shaft 401. The transmission block 502 drives the mass block 508 to no longer contact the brake ring 503, and the car 3 resumes its normal motion state, so that the driving shaft 401 drives the transmission block 502 to rotate coaxially, which no longer affects the rotation of the driving shaft 401. When the car 3 falls, repeating the above movement can avoid the continued falling of the car 3.

[0030] In summary, by setting the transmission block 502, guide groove 504, drive shaft 401, connecting rod 505 and mass block 508, not only can the transmission block 502 and the drive shaft 401 rotate coaxially within the speed threshold of the drive shaft 401, but also after the speed of the drive shaft 401 exceeds the set threshold, the centrifugal force generated by the drive shaft 401 and the combined force of the mass block 508 overcome the pulling force of the first elastic member 506, and under the action of the guide groove 504, the transmission block 502 and the drive shaft 401 are transformed into an eccentrically connected state, so that the transmission block 502 drives the mass block 508 to contact with the brake ring 503, and due to the large mass of the mass block 508, the brake ring 503 and the mass block 508 generate a large friction force after contact, thereby preventing the speed of the drive shaft 401 from increasing, and when the brake mechanism 6 fails, the drive shaft 401 can also be braked in time, thereby avoiding the continuous falling of the car 3 and improving the safety of the elevator during construction.

[0031] Embodiment 3 During use, it was found that when the mass block 508 came into contact with the brake ring 503 for an instant, the friction between the mass block 508 and the brake ring 503 was too large, and there was no certain buffering for the brake ring 503, which could easily cause serious impact damage to the brake ring 503. Therefore, further improvements were made based on the above embodiments.

[0032] like Figure 4 As shown, a plurality of sliders 509 are fixedly connected to the circumferential side of the brake ring 503, a plurality of slide grooves 510 corresponding to the sliders 509 are opened on the inner wall of the positioning box 501, the sliders 509 are slidably connected to the corresponding slide grooves 510, one side of the slider 509 is fixedly connected to a guide rod 511, and the guide rod 511 is mounted with a second elastic member 512 located in the slide groove 510.

[0033] In actual use, when the mass block 508 contacts the brake ring 503 for the first time, the brake ring 503 and the mass block 508 generate a large friction force, and at the same time, a part of the inertia force of the mass block 508 acts on the brake ring 503. At this time, the mass block 508 drives the brake ring 503 to rotate synchronously along the positioning box 501, and the brake ring 503 drives the slider 509 to slide along the slide groove 510, and the slider 509 drives the guide rod 511 to slide along the positioning box 501, and the second elastic member 512 is compressed. In this process, it is possible to buffer a part of the impact force of the mass block 508 on the brake ring 503. After the second elastic member 512 is compressed to the limit state, the mass block 508 no longer drives the brake ring 503 to rotate along the positioning box 501. At this time, the mass block 508 rotates along the brake ring 503, and the friction between the mass block 508 and the brake ring 503 will gradually reduce the rotation speed of the drive shaft 401, thereby preventing the car 3 from falling and preventing the car 3 from falling continuously.

[0034] In summary, by providing a rotatable brake ring 503, a slider 509 and a second elastic member 512, not only can the mass block 508 drive the brake ring 503 to rotate synchronously along the positioning box 501 at the moment when the mass block 508 impacts the brake ring 503, and convert a part of the impact force into the power for the rotation of the brake ring 503, but at the same time, the elastic force of the second elastic member 512 is overcome to further buffer, thereby reducing the influence of the mass block 508 on the brake ring 503, and further ensuring the stability of the interaction between the brake ring 503 and the mass block 508, thereby ensuring that the brake ring 503 and the mass block 508 work normally when the car 3 falls, and avoiding the continuous falling of the car 3.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A construction elevator driven by two motors, comprising a chassis (1), a standard section (2) and a slidingly connected elevator car (3), characterized in that: A driving mechanism (4) is installed between the car (3) and the standard section (2), and a double-shaft driving mechanism (4) and an anti-falling mechanism (5) are provided between the car (3) and the standard section (2). The anti-falling mechanism (5) comprises: A positioning box (501) fixed to the car (3); A driving shaft (401) passing through the positioning box (501) and a transmission block (502) capable of switching between a coaxial state and an eccentric state; A brake ring (503) is arranged in the positioning box (501). When the rotation speed of the driving shaft (401) exceeds a threshold value, the transmission block (502) and the brake ring (503) generate friction braking.

2. The dual-motor driven construction elevator according to claim 1, characterized in that: The anti-falling mechanism (5) comprises an elastic connection structure on the driving shaft (401), the structure being composed of a guide groove (504), a sliding connection rod (505) and a first elastic member (506).

3. The dual-motor driven construction elevator according to claim 2, characterized in that: A counterweight structure is added to the transmission block (502), comprising a clearance groove (507) and a mass block (508), the mass of the mass block (508) being greater than the mass of the transmission block (502), and the gravity of the mass block (508) being less than the pulling force of the first elastic member (506).

4. The dual-motor driven construction elevator according to claim 3, characterized in that: The brake ring (503) is connected to the positioning box (501) via a sliding guide structure, wherein the sliding guide structure comprises a sliding block (509), a sliding groove (510) and a buffer component with a second elastic member (512).

5. The dual-motor driven construction elevator according to claim 4, characterized in that: The sliding guide structure comprises a guide rod (511) arranged on the side of the sliding block (509); the guide rod (511) is sleeved through the second elastic member (512) and is limited in the sliding groove (510).

6. The dual-motor driven construction elevator according to claim 5, characterized in that: The driving mechanism (4) comprises driving motors (402) on the two cars (3), and the output ends of the driving motors (402) are fixedly connected to the corresponding driving shafts (401).

7. The dual-motor driven construction elevator according to claim 6, characterized in that: A rack (403) is fixed to one side of the standard section (2) close to the car (3), and a gear (404) meshing with the rack (403) is fixed to one end of the drive shaft (401) close to the standard section (2).

8. The dual-motor driven construction elevator according to claim 1, characterized in that: A braking mechanism (6) is provided between the standard section (2) and the car (3) and is used to brake the car (3) when it slides.

9. The dual-motor driven construction elevator according to claim 1, characterized in that: An electrical system (7) is provided between the standard section (2) and the car (3) for controlling the lifting, lowering, starting and stopping of the car (3).

10. The dual-motor driven construction elevator according to claim 1, characterized in that: A fence (8) is installed on the outside of the chassis (1).

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