Multi-motor synchronous driving type lifting device

Abstract

The utility model discloses a multi-motor synchronous driving type lifting device which comprises a horizontally-arranged mounting table, anti-skid supporting legs are arranged at the bottom of the mounting table, and a controller and four motor driving lifting mechanisms arranged in a rectangular array are arranged on the mounting table. Each motor-driven lifting mechanism comprises a brushless direct current motor and a worm gear lead screw lifter, a main shaft of the brushless direct current motor is in transmission connection with an input shaft of the worm gear lead screw lifter through a coupler, a lead screw of the worm gear lead screw lifter is arranged in the vertical direction, and the lead screw is in threaded connection with a lifting nut; and a workbench is horizontally arranged among the lifting nuts of the four groups of motor-driven lifting mechanisms. The size of equipment can be reduced, the freedom degree of the lifting device can be improved, transmission mechanisms such as gears and belts are omitted, and the motor power and efficiency of the lifting device can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-motor synchronous control, and in particular relates to a multi-motor synchronous drive type lifting device. Background Art

[0002] As people's living and production needs become higher, in order to meet the requirements of high power and small size, traditional single-motor lifting equipment often cannot meet the requirements. If a single-motor device is used in a high-power environment, the size of the single-motor device will become larger, the stability will decrease, the required voltage will increase, and the design difficulty of the motor controller will increase. The requirements for semiconductor power devices in the motor drive will also be higher, and the production cost will also increase greatly; especially in the fields of medical and industrial fields, there are also higher requirements for the size and degree of freedom of motor equipment. In order to achieve multi-degree-of-freedom control, single-motor equipment will have more transmission mechanisms, such as gears, belts, etc., which will lose part of the motor power. The additional equipment will cause the entire system to be bulky, complex, and costly. In order to solve the above problems, the utility model designs a multi-motor synchronous drive lift device. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a multi-motor synchronous drive lifting device which has simple structure, small volume, easy control, high transmission efficiency and convenient maintenance.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a multi-motor synchronously driven lifting device, including a horizontally arranged mounting platform, a non-slip support leg is provided at the bottom of the mounting platform, a controller and four groups of motor-driven lifting mechanisms arranged in a rectangular array are provided on the mounting platform; each group of motor-driven lifting mechanisms includes a brushless DC motor and a worm gear screw lift, the main shaft of the brushless DC motor is connected to the input shaft of the worm gear screw lift through a coupling, the screw of the worm gear screw lift is arranged in a vertical direction, and a lifting nut is threadedly connected to the screw; a workbench is horizontally arranged between the lifting nuts of the four groups of motor-driven lifting mechanisms.

[0005] The brushless DC motor is fixedly connected to the mounting platform through an L-shaped bracket. The L-shaped bracket includes a horizontal plate and a vertical plate that are fixedly connected. Two long holes are opened on the horizontal plate. The length direction of the two long holes is parallel to the main axis of the brushless DC motor. The horizontal plate is threadedly connected to the mounting platform through a first connecting bolt that vertically passes through the two long holes. A through hole for passing the main axis of the brushless DC motor is opened on the vertical plate. The brushless DC motor is fixedly connected to the vertical plate through a second connecting bolt. A triangular reinforcing rib is provided between the horizontal plate and the vertical plate.

[0006] A pad is provided at the bottom of the base of the worm gear screw lift, and the pad is connected to the mounting platform bolts through a second connecting bolt arranged vertically.

[0007] The anti-slip leg includes a vertically arranged support rod, the upper end of the support rod is threadedly connected to the mounting platform, the lower end of the support rod is threadedly connected to the support, the thread rotation direction of the upper outer circle of the support rod is opposite to the thread rotation direction of the lower outer circle, the upper and lower parts of the support rod are respectively threadedly connected with an upper locking nut and a lower locking nut, the upper locking nut is crimped to the bottom surface of the mounting platform, the lower locking nut is crimped to the upper end surface of the support, an anti-slip rubber pad is provided on the lower end surface of the support, and a flat structure for clamping a wrench is provided on opposite sides of the middle part of the support rod.

[0008] By adopting the above technical scheme, the utility model sends speed or position signal instructions to four brushless DC motors through a controller. After receiving the instructions, the four brushless DC motors move synchronously to output speed or position information to drive the worm gear screw lifter. The screw rotates to move the lifting nut up and down, and the workbench rises and falls synchronously with the four lifting nuts.

[0009] The utility model solves the problems in the prior art that when a single motor is used in an elevator device, the equipment requires large power, has a large volume, poor stability, and high voltage, and the motor controller is difficult to design, the semiconductor power device in the drive is required to be high, and the production cost is high. The utility model can reduce the volume of the equipment and increase the degree of freedom of the elevator device, eliminate the transmission mechanism such as gears, belts, etc., and can improve the motor power and efficiency of the elevator device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the lift device in the utility model;

[0011] Figure 2 yes Figure 1 Enlarged view of part A in the middle. DETAILED DESCRIPTION

[0012] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0013] like Figure 1 and Figure 2As shown, the multi-motor synchronously driven lifting device of the utility model comprises a horizontally arranged mounting platform 1, the bottom of the mounting platform 1 is provided with anti-skid legs 2, the mounting platform 1 is provided with a controller 3 and four groups of motor-driven lifting mechanisms arranged in a rectangular array; each group of motor-driven lifting mechanisms comprises a brushless DC motor 4 and a worm gear screw lift 5, the main shaft of the brushless DC motor 4 is connected to the input shaft of the worm gear screw lift 5 through a coupling 6, the screw 7 of the worm gear screw lift 5 is arranged in a vertical direction, and a lifting nut 8 is threadedly connected to the screw 7; a workbench 9 is horizontally arranged between the lifting nuts 8 of the four groups of motor-driven lifting mechanisms; the controller 3 sends a speed or position signal instruction to the four brushless DC motors 4, and the four brushless DC motors 4 move synchronously after receiving the instruction to output the speed or position information to drive the worm gear screw lift 5, the screw 7 rotates to make the lifting nut 8 move up and down, and the workbench 9 rises and falls synchronously with the four lifting nuts 8.

[0014] The brushless DC motor 4 is fixedly connected to the mounting platform 1 through an L-shaped bracket 10. The L-shaped bracket 10 includes a horizontal plate 11 and a vertical plate 12 that are fixedly connected. The horizontal plate 11 is provided with two long holes. The length direction of the two long holes is parallel to the main axis of the brushless DC motor 4. The horizontal plate 11 is threadedly connected to the mounting platform 1 through a first connecting bolt that vertically passes through the two long holes. The vertical plate 12 is provided with a through hole for passing the main axis of the brushless DC motor 4. The brushless DC motor 4 is fixedly connected to the vertical plate 12 through a second connecting bolt. A triangular reinforcing rib 13 is provided between the horizontal plate 11 and the vertical plate 12. The long hole is used to adjust the position of the L-shaped bracket 10, so as to facilitate the installation of the coupling 6 between the brushless DC motor 4 and the worm gear screw lift 5.

[0015] A pad 15 is provided at the bottom of the base of the worm gear screw lift 5 , and the pad 15 is bolted to the mounting platform 1 through a second connecting bolt 23 arranged vertically.

[0016] The anti-slip leg 2 includes a vertically arranged support rod 16, the upper end of the support rod 16 is threadedly connected to the mounting platform 1, and the lower end of the support rod 16 is threadedly connected to the support 18, the thread rotation direction of the upper outer circle of the support rod 16 is opposite to the thread rotation direction of the lower outer circle, and the upper and lower parts of the support rod 16 are respectively threadedly connected with an upper locking nut 19 and a lower locking nut 20, the upper locking nut 19 is crimped to the bottom surface of the mounting platform 1, and the lower locking nut 20 is crimped to the upper end surface of the support 18, and the lower end surface of the support 18 is provided with an anti-slip rubber pad 21, and a plane structure 22 for clamping a wrench is provided on the opposite sides of the middle part of the support rod 16.

[0017] By loosening the upper locking nut 19 and the lower locking nut 20, and then rotating the support rod 16, since the thread rotation direction of the upper outer circle of the support rod 16 is opposite to the thread rotation direction of the lower outer circle, the height of the mounting platform 1 (the distance between the support 18 and the mounting platform 1) can be adjusted when rotating the support rod 16. After the adjustment is completed, tighten the locking nut 19. The anti-skid rubber pad 20 ensures the stability of the entire device.

[0018] It should be emphasized that the automatic control of the controller 3 in the present invention sending speed or position signal instructions to the four brushless DC motors 4 does not involve a new computer program.

[0019] The above embodiments illustrate the basic principles and features of the utility model, but the above only illustrates the preferred embodiments of the utility model and is not limited by the embodiments. Under the inspiration of this patent, ordinary technicians in this field can also make many forms of deformation and improvement without departing from the purpose of the utility model and the scope of protection of the claims, which are all within the scope of protection of the utility model. Therefore, the patent and protection scope of the utility model shall be subject to the attached claims.

Claims

1. Multi-motor synchronous drive lifting device, characterized in that: It includes a horizontally arranged mounting platform, the bottom of which is provided with anti-skid legs, a controller and four sets of motor-driven lifting mechanisms arranged in a rectangular array are arranged on the mounting platform; each set of motor-driven lifting mechanisms includes a brushless DC motor and a worm gear screw lift, the main shaft of the brushless DC motor is connected to the input shaft of the worm gear screw lift through a coupling, the screw of the worm gear screw lift is arranged in a vertical direction, and a lifting nut is threadedly connected to the screw; a workbench is horizontally arranged between the lifting nuts of the four sets of motor-driven lifting mechanisms.

2. The multi-motor synchronously driven lifting device according to claim 1, characterized in that: The brushless DC motor is fixedly connected to the mounting platform through an L-shaped bracket. The L-shaped bracket includes a horizontal plate and a vertical plate that are fixedly connected. Two long holes are opened on the horizontal plate. The length direction of the two long holes is parallel to the main axis of the brushless DC motor. The horizontal plate is threadedly connected to the mounting platform through a first connecting bolt that vertically passes through the two long holes. A through hole for passing the main axis of the brushless DC motor is opened on the vertical plate. The brushless DC motor is fixedly connected to the vertical plate through a second connecting bolt. A triangular reinforcing rib is provided between the horizontal plate and the vertical plate.

3. The multi-motor synchronously driven lifting device according to claim 1, characterized in that: A pad is provided at the bottom of the base of the worm gear screw lift, and the pad is connected to the mounting platform bolts through a second connecting bolt arranged vertically.

4. The multi-motor synchronously driven lifting device according to claim 1, characterized in that: The anti-slip leg includes a vertically arranged support rod, the upper end of the support rod is threadedly connected to the mounting platform, the lower end of the support rod is threadedly connected to the support, the thread rotation direction of the upper outer circle of the support rod is opposite to the thread rotation direction of the lower outer circle, the upper and lower parts of the support rod are respectively threadedly connected with an upper locking nut and a lower locking nut, the upper locking nut is crimped to the bottom surface of the mounting platform, the lower locking nut is crimped to the upper end surface of the support, an anti-slip rubber pad is provided on the lower end surface of the support, and a flat structure for clamping a wrench is provided on opposite sides of the middle part of the support rod.

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