Large load-carrying machine room-less dual-drive freight elevator

Abstract

The present invention proposes a large-load machine room-less dual-drive freight elevator. The large-load freight elevator includes a car frame, a counterweight frame, a main beam, and a traction main machine. The main beam is horizontally fixed on the top of the shaft. Two traction main machines are arranged on the main beam. Two groups of rope pulleys are respectively arranged on the car frame and the counterweight frame. The two traction main machines are respectively passed through each group of rope pulleys and fixed by rope head devices. Tension detection devices are arranged on the rope head devices. Torque detection devices are respectively arranged on the two traction main machines. The tension detection devices detect the tension value of each group of traction ropes and feed it back to the elevator control cabinet. The torque detection devices detect the torque value of the traction main machines and feed it back to the elevator control cabinet. By arranging two traction main machines, the limited space in the shaft is adapted, and the changes in the traction force of the traction ropes are detected by the tension detection device. The traction forces of the two traction main machines are balanced by the controller in the control cabinet.

Description

Technical Field

[0001] The invention relates to an improved driving structure of a freight elevator, in particular to a heavy-load machine room-less dual-drive freight elevator. Background Art

[0002] A freight elevator is a heavy-load device used to transport goods between different floors. The freight elevator has a large cabin space and requires a large traction force, so it usually requires a traction host with a large traction force. Usually, this type of traction host is suitable for the elevator shaft structure with a machine room. However, with the diversification of buildings, the top height of the elevator shaft reserved in some buildings is insufficient to set up a complete machine room space. The traction host needs to be installed directly on the top of the shaft. Therefore, the space on the top is not enough to install a traction host with a large traction force, and the driving structure of the freight elevator needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a large-load machine room-less dual-drive freight elevator.

[0004] The technical solution adopted by the present invention to solve the above-mentioned problem is: a heavy-load freight elevator includes a car frame, a counterweight frame, a main beam, and a traction main machine. The main beam is horizontally fixed on the top of the shaft. Two traction main machines are arranged on the main beam. Two groups of rope pulleys are respectively arranged on the car frame and the counterweight frame. The two traction main machines are respectively passed through each group of rope pulleys and fixed through a rope head device. A tension detection device is arranged on the rope head device. The two traction main machines are respectively provided with a torque detection device. The tension detection device detects the tension value of each group of traction ropes and feeds it back to the elevator control cabinet. The torque detection device detects the torque value of the traction main machine and feeds it back to the elevator control cabinet. The elevator control cabinet balances and adjusts the driving force of the two traction main machines according to the tension value and the torque value. By setting up two traction main machines, the traction force of a single traction main machine is reduced and adapted to the limited space in the shaft, the overall total load is not affected, and the change in the traction force of the traction rope is detected by the tension detection device, and the change in the traction torque of the traction machine is detected by the torque detection device. The traction force of the two traction main machines is balanced through the controller in the control cabinet to achieve smooth operation of the elevator car.

[0005] Furthermore, the main beam is offset and arranged on one side of the shaft, and the two traction main machines on the main beam are arranged at a distance, and the axes of the traction wheels of the two traction main machines are arranged in a colinear manner. The lower part of the main beam corresponds to the spacing between the car frame and the counterweight frame, and the two ends of the traction rope of the traction main machine are respectively passed through the rope wheels of the car frame and the counterweight frame, and then the rope wheels are reversely folded back and fixed to the top of the shaft. The main beam is the main basic structure for fixing the traction main machine, and its installation position corresponds to the rope wheels of the car frame and the counterweight frame at the same time, so that the traction rope on the traction main machine is passed through the rope wheels of the structures on both sides, and the end of the traction rope is fixed at the top of the elevator shaft, so that the rope wheels of the car frame and the counterweight frame form a movable pulley structure, which plays a role in saving the traction force of the traction machine.

[0006] Furthermore, a secondary beam is arranged in parallel on the other side of the shaft opposite to the main beam, and rope head devices are arranged on both the main beam and the secondary beam. The rope head device on the main beam is used to fix the rope head at the counterweight end, and the rope head device on the secondary beam is used to fix the rope head at the car end. A car speed limiter is arranged on the secondary beam. The secondary beam is mainly used to fix the rope head and the speed limiter. The speed limiter can detect the running state of the car, and adjust the traction force of the traction main machine by detecting the running state of the car. The rope head device has a fixed foundation and can be used to install the tension detection device.

[0007] Furthermore, the torque detection device is installed at the traction wheel of the traction main machine, and the sensing end of the torque detection device is arranged corresponding to the shaft end of the traction wheel. The torque detection device detects the output torque of the traction wheel of the traction main machine and provides data feedback in time.

[0008] Furthermore, a damping spring is sleeved on the end of the rope head device through a locking piece, and the damping spring and the tension detection device are arranged to press against each other, and the tension detection device detects the pressure change of the damping spring caused by the traction rope. The damping spring is axially connected to the rope head device, and can most directly sense the change of the pulling tension of the traction rope, and has a good fixing foundation, which is convenient for installation.

[0009] Furthermore, the car frame includes vertical beams, horizontal beams, and bottom beams. The two vertical beams, the upper horizontal beams, and the bottom beams form a rectangular fixed frame. The car frame includes three groups of vertical beams, horizontal beams, and bottom beams, and are laterally fixedly connected by connecting beams. All bottom beams form a supporting plane, and a bottom support plate is arranged on the supporting plane. The car is fixed on the bottom support plate. Two groups of car sheaves are installed on the bottom beam, and the outer edges of the car sheaves are arranged outside the end edges of the bottom beam. The car frame is formed by combining multiple groups of basic frames, which can form a larger car basic support structure to meet the requirements of large space and large load of the freight elevator, and the sheaves can be arranged at intervals and balanced in length to play a role of balanced traction.

[0010] Furthermore, the counterweight frame includes a bottom cross frame, a vertical frame, and a sheave frame. The bottom cross frame is the bottom support structure of the counterweight frame. The vertical frame is vertically fixed on the bottom cross frame to form a counterweight fixing space. The sheave frame is fixed on the upper part of the counterweight frame to form a closed rectangular structure. The sheave frame is provided with a counterweight sheave, and the counterweight sheaves are respectively provided corresponding to the traction main machine. The counterweight frame is mainly provided near the wall of the shaft. It is small in size and large in mass. Therefore, a concentrated space for installing the counterweight block is provided. In order to adapt to the length of the car frame, the counterweight block is arranged in a partitioned manner to achieve the counterweight balance of the counterweight frame and the car frame.

[0011] Furthermore, the rope pulley frame is separated into two or more counterweight fixing spaces in the counterweight frame, each counterweight fixing space is individually provided with a counterweight block, and the counterweight blocks in all counterweight fixing spaces are arranged with a balanced center of gravity, and the center of gravity is located at the geometric center of the counterweight frame as a whole. The counterweight of the counterweight frame is arranged in partitions, the center of gravity is centralized, the counterweight accuracy is improved, and traction is facilitated.

[0012] Compared with the prior art, the present invention has the following advantages and effects: the present design is an improvement on the dual-drive form of a freight elevator, which can adapt to installation scenarios with limited space at the top of the shaft, can meet the requirements of installing large freight elevators in such buildings, and the overall operation of the freight elevator is reliable and stable, and is conducive to saving energy, reducing energy consumption during low-load operation, and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the side structure of a dual-drive freight elevator.

[0014] Figure 2 It is a top view structural diagram of a dual-drive freight elevator.

[0015] Figure 3 It is a structural diagram of the civil engineering section of the shaft.

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the sheave arrangement.

[0017] Figure 5 It is a structural schematic diagram of the rope head device.

[0018] In the figure: 1, car frame, 2, counterweight frame, 3, main beam, 4, traction main machine, 5, tension detection device, 6, torque detection device, 7, auxiliary beam, 8, rope head device, 9, car speed limiter, 10, shock-absorbing spring, 11, vertical beam, 12, horizontal beam, 13, bottom beam, 14, connecting beam, 15, car pulley, 16, bottom horizontal frame, 17, vertical frame, 18, pulley frame, 19, counterweight fixing space, 20, counterweight pulley, 21, counterweight block. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0020] A heavy-load machine-room-less dual-drive freight elevator, the heavy-load freight elevator comprising a car frame 1, a counterweight frame 2, a main beam 3, and a traction main machine 4. The main beam 3 is horizontally fixed on the top of the shaft, two traction main machines 4 are arranged on the main beam 3, two groups of rope pulleys are respectively arranged on the car frame 1 and the counterweight frame 2, the two traction main machines 4 are respectively passed through each group of rope pulleys and fixed by a rope head device 8, a tension detection device 5 is arranged on the rope head device 8, and a torque detection device 6 is respectively arranged on the two traction main machines 4. The tension detection device 5 detects the tension value of each group of traction ropes and feeds it back to the elevator control cabinet, the torque detection device 6 detects the torque value of the traction main machine 4 and feeds it back to the elevator control cabinet, and the elevator control cabinet balances and adjusts the driving force of the two traction main machines 4 according to the tension value and the torque value.

[0021] The main beam 3 is offsetly arranged on one side of the shaft, and two traction main machines 4 are arranged at a distance on the main beam 3. The axes of the traction wheels of the two traction main machines 4 are arranged colinearly, and the lower part of the main beam 3 corresponds to the interval space between the car frame 1 and the counterweight frame 2. The two ends of the traction rope hanging down from the traction main machine 4 are respectively passed through the rope wheels of the car frame 1 and the counterweight frame 2, and then folded back and fixed to the top of the shaft by the rope wheels.

[0022] A secondary beam 7 is arranged parallel to the other side of the shaft opposite to the main beam 3. Rope head devices 8 are arranged on both the main beam 3 and the secondary beam 7. The rope head device 8 on the main beam 3 is used to fix the rope head at the counterweight end, and the rope head device 8 on the secondary beam 7 is used to fix the rope head at the car end. A car speed limiter 9 is arranged on the secondary beam 7.

[0023] The torque detection device 6 is installed at the traction wheel of the traction main machine 4, and the sensing end of the torque detection device 6 is arranged corresponding to the shaft end of the traction wheel.

[0024] The end of the rope head device 8 is sleeved with a shock-absorbing spring 10 through a locking piece. The shock-absorbing spring 10 and the tension detection device 5 are arranged to press against each other. The tension detection device 5 detects the pressure change of the shock-absorbing spring 10 caused by the traction rope.

[0025] The car frame 1 includes a vertical beam 11, a horizontal beam 12, and a bottom beam 13. The two vertical beams 11 and the upper horizontal beam 12 and the bottom beam 13 form a rectangular fixed frame. The car frame 1 includes three groups of vertical beams 11, horizontal beams 12, and bottom beams 13, and are laterally fixedly connected by connecting beams 14. All bottom beams 13 form a supporting plane, and a bottom supporting plate is arranged on the supporting plane. The car is fixed on the bottom supporting plate. Two groups of car pulleys 15 are installed on the bottom beam 13, and the outer edges of the car pulleys 15 are arranged outside the end edges of the bottom beam 13.

[0026] The counterweight frame 2 includes a bottom cross frame 16, a vertical frame 17, and a rope pulley frame 18. The bottom cross frame 16 is the bottom supporting structure of the counterweight frame 2. The vertical frame 17 is vertically fixed on the bottom cross frame 16 to form a counterweight fixing space 19. The rope pulley frame 18 is fixed on the upper part of the counterweight frame 2 to form a closed rectangular structure. A counterweight rope pulley 20 is arranged on the rope pulley frame 18, and the counterweight rope pulleys 20 are respectively arranged corresponding to the traction main machine 4.

[0027] The rope pulley frame 18 separates more than two counterweight fixing spaces 19 in the counterweight frame 2, and a counterweight block 21 is individually arranged in each counterweight fixing space 19. The counterweight blocks 21 in all counterweight fixing spaces 19 are arranged with a balanced center of gravity, and the center of gravity is located at the geometric center of the counterweight frame 2 as a whole.

[0028] It is obvious 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention, and that the embodiments should be considered exemplary rather than restrictive in any respect, and that the scope of the present invention is defined by the claims rather than the above description, and that all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A heavy-load machine-room-less dual-drive freight elevator, characterized in that: A heavy-load freight elevator comprises a car frame (1), a counterweight frame (2), a main beam (3), and a traction main machine (4). The main beam (3) is horizontally fixed on the top of a shaft. Two traction main machines (4) are arranged on the main beam (3). Two groups of rope sheaves are respectively arranged on the car frame (1) and the counterweight frame (2). The two traction main machines (4) are respectively passed through each group of rope sheaves and fixed through a rope head device (8). A tension detection device (5) is arranged on the rope head device (8). The two traction main machines (4) are respectively provided with a torque detection device (6). The tension detection device (5) detects the tension value of each group of traction ropes and feeds it back to the elevator control cabinet. The torque detection device (6) detects the torque value of the traction main machine (4) and feeds it back to the elevator control cabinet. The elevator control cabinet balances and adjusts the driving force of the two traction main machines (4) according to the tension value and the torque value.

2. The heavy-load machine-room-less dual-drive freight elevator according to claim 1 is characterized in that: The main beam (3) is offsetly arranged on one side of the hoistway, two traction main machines (4) are arranged at a distance on the main beam (3), the axes of the traction wheels of the two traction main machines (4) are arranged in a colinear manner, the lower part of the main beam (3) corresponds to the spacing between the car frame (1) and the counterweight frame (2), the two ends of the traction rope hanging down from the traction main machine (4) are respectively passed through the rope wheels of the car frame (1) and the counterweight frame (2), and then the rope wheels are folded back and fixed to the top of the hoistway.

3. The heavy-load machine-room-less dual-drive freight elevator according to claim 2 is characterized in that: A secondary beam (7) is arranged in parallel on the other side of the shaft opposite to the main beam (3); both the main beam (3) and the secondary beam (7) are provided with rope head devices (8); the rope head device (8) on the main beam (3) is used to fix the rope head at the counterweight end; the rope head device (8) on the secondary beam (7) is used to fix the rope head at the car end; and a car speed limiter (9) is arranged on the secondary beam (7).

4. The heavy-load machine-room-less dual-drive freight elevator according to claim 1 is characterized in that: The torque detection device (6) is installed at the traction wheel of the traction main machine (4), and the sensing end of the torque detection device (6) is arranged corresponding to the shaft end of the traction wheel.

5. The heavy-load machine-room-less dual-drive freight elevator according to claim 2 is characterized in that: The end of the rope head device (8) is sleeved with a shock absorbing spring (10) via a locking piece, the shock absorbing spring (10) and the tension detection device (5) are arranged to press against each other, and the tension detection device (5) detects the pressure change of the shock absorbing spring (10) caused by the traction rope.

6. The heavy-load machine-room-less dual-drive freight elevator according to claim 1 is characterized in that: The car frame (1) comprises a vertical beam (11), a horizontal beam (12) and a bottom beam (13); the two vertical beams (11) and the upper horizontal beam (12) and the bottom beam (13) form a rectangular fixed frame; the car frame (1) comprises three groups of vertical beams (11), horizontal beams (12) and bottom beams (13), which are laterally fixedly connected by connecting beams (14); all bottom beams (13) form a supporting plane; a bottom supporting plate is arranged on the supporting plane; a car is fixed on the bottom supporting plate; two groups of car rope pulleys (15) are installed on the bottom beam (13); the outer edges of the car rope pulleys (15) are arranged outside the end edges of the bottom beam (13).

7. The heavy-load machine-room-less dual-drive freight elevator according to claim 1 is characterized in that: The counterweight frame (2) comprises a bottom cross frame (16), a vertical frame (17), and a rope pulley frame (18). The bottom cross frame (16) is a bottom support structure of the counterweight frame (2). The vertical frame (17) is vertically fixed on the bottom cross frame (16) to form a counterweight fixing space (19). The rope pulley frame (18) is fixed on the upper part of the counterweight frame (2) to form a closed rectangular structure. A counterweight rope pulley (20) is arranged on the rope pulley frame (18). The counterweight rope pulleys (20) are arranged corresponding to the traction main machine (4).

8. The heavy-load machine-room-less dual-drive freight elevator according to claim 7 is characterized in that: The rope pulley frame (18) separates two or more counterweight fixing spaces (19) in the counterweight frame (2), each counterweight fixing space (19) is individually provided with a counterweight block (21), and the counterweight blocks (21) in all the counterweight fixing spaces (19) are arranged with a balanced center of gravity, which is located at the geometric center of the entire counterweight frame (2).

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