Screw synchronous lifting device

Abstract

The invention belongs to the field of machinery, and relates to a lead screw synchronous lifting device. Comprising a servo motor, a turbine lead screw lifter, a support and a lifting platform. One motor is used for synchronously driving the four lead screws to lift the material frame, and workers are assisted in completing the lifting operation of the material frame entering and exiting the furnace. According to the lifting device, a servo motor is used for providing power, a second gear and a first gear are meshed with each other, output power of the servo motor is decomposed and converted into two opposite rotating motions, and then the two opposite rotating motions are stably and reliably transmitted to two sets of turbine lead screw lifters through reasonable connection of chain wheels and chains. And the four screw rods of the four turbine screw rod lifters are synchronously driven to move up and down, so that the stable lifting and descending of the material platform are ensured, and the reliable transfer of the material frame is realized. Compared with a scissor fork and a chain, the lead screw has the self-locking capacity, a self-locking mechanism does not need to be additionally designed, the complexity of the lifting device is reduced, and meanwhile the field use requirement can be met.

Description

Technical Field

[0001] The invention belongs to the field of machinery and relates to a screw synchronous lifting device. Background Art

[0002] Generally, the parts to be heat treated are placed in a metal frame, and then the two are placed together in a heat treatment furnace for heat treatment. The door of the heat treatment furnace is at a certain height from the ground, and the total weight of the parts and the frame is usually large. Manual handling is labor-intensive and has low production efficiency. It is difficult to ensure that the frame does not swing or tilt using a gantry suspension method. Moreover, the gantry suspension method is not suitable for loading into a horizontal heat treatment furnace. Therefore, a reliable lifting device is required.

[0003] Most common lifting devices use scissor forks or chains. The scissor fork lifting device is more troublesome to assemble. For safety reasons, the lifting device also needs to have self-locking ability to prevent the material frame from falling off and causing damage to parts when the equipment fails unexpectedly. The scissor fork or chain form requires additional self-locking devices, which increases the complexity of the device. Summary of the invention

[0004] Purpose of the Invention

[0005] In order to solve the above-mentioned problem, the present invention proposes a screw synchronous lifting device, which uses a motor to synchronously drive four screws to lift the material frame, thereby assisting workers to complete the lifting operation of the material frame in and out of the furnace.

[0006] Technical Solution

[0007] A screw synchronous lifting device comprises a servo motor, a turbine screw lifter, a bracket and a lifting platform.

[0008] The bracket is provided with a servo motor, four worm screw lifts and a first shaft. The servo motor is connected to the first shaft through a first coupling, the first shaft is provided with a first gear and a first sprocket, the first sprocket is connected to the first worm screw lift through a first chain, the first worm screw lift is connected to one end of the third shaft through a second coupling, and the other end of the third shaft is connected to the second worm screw lift through a second coupling. The servo motor is responsible for providing power, driving the first shaft to rotate, driving the first sprocket to rotate, and the rotational motion of the first sprocket is transmitted to the worm of the first worm screw lift through the first chain, so that the screw of the first worm screw lift can achieve up and down movement. At the same time, the worm of the first worm screw lift is connected to the worm of the second worm screw lift through the third shaft, so that the screw of the first worm screw lift can achieve synchronous up and down movement with the screw of the second worm screw lift.

[0009] The bracket is also provided with a second shaft, which is installed on the left side of the first shaft. The second shaft is provided with a second gear and a second sprocket, and the second gear and the first gear are meshed with each other. When the first shaft rotates, the interaction between the second gear and the first gear causes the second shaft to rotate in the opposite direction, and the rotation in the opposite direction is transmitted to the third worm screw lifter through another set of sprocket chains. The worm of the third worm screw lifter is also connected to the worm of the fourth worm screw lifter through another third shaft, ensuring that the screw of the third worm screw lifter and the screw of the fourth worm screw lifter can move up and down synchronously. The installation directions of the third worm screw lifter and the fourth worm screw lifter are symmetrical to those of the first worm screw lifter and the second worm screw lifter, so that the screws of the four worm screw lifters can move up and down synchronously. Lift the lifting platform upward, thereby driving the material frame to move upward, and perform the loading operation.

[0010] Furthermore, the lifting platform can be adjusted to different heights by turning the power of the servo motor on and off at any time.

[0011] Furthermore, the first gear and the second gear are both made of metal materials.

[0012] Furthermore, the metal is specifically stainless steel.

[0013] Furthermore, the first gear and the second gear are of the same size and thickness.

[0014] Furthermore, the first gear and the second gear should be installed at the same height.

[0015] Furthermore, the servo motor is fixed on the bracket by screwing.

[0016] Furthermore, the first sprocket and the second sprocket have the same length.

[0017] The beneficial effects of this application are:

[0018] The present invention provides a simple and reliable lifting device with high feasibility. The lifting device uses a servo motor 1 to provide power, and the second gear 6 and the first gear 4 are meshed with each other to decompose the output power of the servo motor 1 into two opposite rotational motions, and then the two opposite rotational motions are stably and reliably transmitted to two groups of worm screw lifts 9 through the reasonable connection of sprockets and chains, and the four screws of the four worm screw lifts 9 are synchronously driven to move up and down, thereby ensuring the smooth lifting and lowering of the material platform, thereby realizing the reliable transportation of the material frame.

[0019] The structure of the present invention is efficient and reasonable, and can ensure that the lifting process is smooth and reliable. A single power source is used to reduce the complexity of the control system. The present invention uses four turbine screw lifters 9, so that the screw synchronous lifting device has a self-locking ability, which reduces the complexity of the mechanical system and can ensure that the material frame will not fall and damage parts in the event of power failure or motor failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the screw rod synchronous lifting device;

[0021] Figure 2 This is a side view of the screw synchronous lifting device;

[0022] Figure 3 It is a side view of the screw synchronous lifting device;

[0023] Figure 4 This is a partial enlarged view of the screw synchronous lifting device. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in combination with specific practices.

[0026] See also Figure 1 A screw synchronous lifting device includes a servo motor 1, a first coupling 2, a first shaft 3, a first gear 4, a second shaft 5, a second gear 6, sprocket chains 7 and 8, a worm screw lifter 9, a third shaft 10, a second coupling 11, a bracket 12, a lifting platform 13 and other structures. The sprocket chain 7 and the sprocket chain 8 include a group of sprockets 14 and a chain 15 respectively.

[0027] The lifting platform 13 is used to place the material frame, and the bracket 12 is the main structure of the device and the installation platform for all parts. The present invention uses four turbine screw lifters 9, which are symmetrically installed in groups of two. Figure 1The two worm screw lifts of the same group are connected by the third shaft 10 and the second coupling 11 to ensure the synchronous movement of the two screws of the worm screw lift 9 of the same group. The servo motor 1 is the power source of the whole device. The servo motor 1 is connected to the first shaft 3 through the first coupling 2. When the output shaft of the servo motor 1 rotates clockwise, it will drive the first shaft 3 to rotate clockwise. Figure 1 A sprocket 14 is installed at the input end of the right set of worm screw lifts 9 and the end of the first shaft 3, and the two sprockets are connected by a chain 15. When the first shaft 3 rotates clockwise, the worm of the right set of worm screw lifts will also rotate clockwise, thereby driving the two screws to move upward.

[0028] The first shaft 3 and the second shaft 5 are respectively provided with a first gear 4 and a second gear 6, which mesh with each other. When the first shaft 3 rotates clockwise, the first gear 4 on the first shaft 3 rotates clockwise, driving the second gear 6 to rotate counterclockwise, so that the second shaft 5 rotates counterclockwise, and the rotary motion of the second shaft 5 is transmitted to the sprocket chain 7. Figure 1 The left set of worm screw lifts makes the worm of the worm screw lift 9 move counterclockwise. Due to the different installation methods of the left and right sets of worm screw lifts, when the worm of the worm screw lift 9 moves counterclockwise, Figure 1 The two lead screws on the left will move upward.

[0029] At this time, the four screw rods of the screw rod synchronous lifting device move upward synchronously, lifting the lifting platform 13 upward, thereby driving the material frame to move upward, assisting the worker to perform the loading operation. When unloading, the operation will be performed in accordance with the opposite operation to the above-mentioned method.

[0030] Compared with scissor forks and chains, the screw synchronous lifting device has a self-locking capability, and no additional self-locking mechanism needs to be designed, which reduces the complexity of the lifting device and can also meet the requirements of on-site use. The screw synchronous lifting device mainly includes a servo motor 1, a turbine screw lift 9, a bracket 12, and a lifting platform 13.

[0031] The bracket 12 is provided with a servo motor 1, four worm screw lifts 9, and a first shaft 3. The servo motor 1 is connected to the first shaft 3 through a first coupling 2, and the first shaft 3 is provided with a first gear 4 and a first sprocket 14. The first sprocket 14 is connected to the first worm screw lift 9 through a first chain 15. The first worm screw lift 9 is connected to one end of the third shaft 10 through a second coupling 11, and the other end of the third shaft 10 is connected to the second worm screw lift 9 through a second coupling 11. The servo motor 1 is responsible for providing power, driving the first shaft 3 to rotate, driving the first sprocket 14 to rotate, and the rotational motion of the first sprocket 14 is transmitted to the worm of the first worm screw lift 9 through the first chain 15, so that the screw of the first worm screw lift 9 can achieve up and down movement. At the same time, the worm of the first worm screw lift 9 is connected to the worm of the second worm screw lift 9 through the third shaft 10, so that the screw of the first worm screw lift 9 can achieve synchronous up and down movement with the screw of the second worm screw lift 9.

[0032] The bracket 12 is also provided with a second shaft 5, which is installed on the left side of the first shaft 3. The second shaft 5 is provided with a second gear 6 and a second sprocket, and the second gear 6 and the first gear 4 are meshed with each other. When the first shaft 3 rotates, the interaction between the second gear 6 and the first gear 4 causes the second shaft 5 to rotate in the opposite direction, and the rotation in the opposite direction is transmitted to the third worm screw lift 9 through another set of sprocket chains. The worm of the third worm screw lift 9 is also connected to the worm of the fourth worm screw lift 9 through another third shaft 10, ensuring that the screw of the third worm screw lift 9 and the screw of the fourth worm screw lift 9 can move up and down synchronously. The installation directions of the third worm screw lift 9 and the fourth worm screw lift 9 are symmetrical to those of the first worm screw lift 9 and the second worm screw lift 9, so that the screws of the four worm screw lifts 9 can move up and down synchronously. Lift the lifting platform 13 upward, thereby driving the material frame to move upward, and perform the loading operation.

[0033] In a certain implementation case of the present invention, the lifting platform 13 is adjusted to different height positions by turning the power of the servo motor 1 on and off at any time.

[0034] In an implementation case of the present invention, the first gear 4 and the second gear 6 are both made of metal materials.

[0035] In a certain implementation case of the present invention, the metal is specifically stainless steel, which can ensure strength and have a longer service life. While the hardness of the gears is guaranteed, the gears rotate relative to each other without being easily damaged.

[0036] In a certain implementation case of the present invention, the first gear 4 and the second gear 6 are the same in size and thickness, ensuring that the lifting heights of the different turbine screw lifters 9 on both sides are consistent.

[0037] In a certain implementation case of the present invention, the first gear 4 and the second gear 6 are installed at the same height.

[0038] In a certain implementation case of the present invention, the servo motor 1 is fixed on the bracket 12 by screwing.

[0039] In a certain implementation case of the present invention, the first sprocket and the second sprocket have the same length, which can ensure that the actuation distance is consistent, so that the lifting height of the turbine screw lifter 9 is consistent.

[0040] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A screw synchronous lifting device, characterized in that: Including servo motor, screw lift, bracket, lifting platform; The bracket is provided with a servo motor, four worm screw lifts and a first shaft; the servo motor is connected to the first shaft through a first coupling, the first shaft is provided with a first gear and a first sprocket, the first sprocket is connected to the first worm screw lift through a first chain, the first worm screw lift is connected to one end of the third shaft through a second coupling, and the other end of the third shaft is connected to the second worm screw lift through a second coupling; the servo motor is responsible for providing power to drive the first shaft to rotate, drive the first sprocket to rotate, and the rotational motion of the first sprocket is transmitted to the worm of the first worm screw lift through the first chain, so that the screw of the first worm screw lift can achieve up and down movement; at the same time, the worm of the first worm screw lift is connected to the worm of the second worm screw lift through the third shaft, so that the screw of the first worm screw lift can achieve synchronous up and down movement with the screw of the second worm screw lift; The bracket is also provided with a second shaft, which is installed on the left side of the first shaft, and the second shaft is provided with a second gear and a second sprocket, and the second gear and the first gear are meshed with each other; when the first shaft rotates, the interaction between the second gear and the first gear causes the second shaft to rotate in the opposite direction, and the rotation in the opposite direction will be transmitted to the third worm screw lift through another set of sprocket chains; the worm of the third worm screw lift is also connected to the worm of the fourth worm screw lift through another third shaft, ensuring that the screw of the third worm screw lift and the screw of the fourth worm screw lift can move up and down synchronously; the installation directions of the third worm screw lift and the fourth worm screw lift are symmetrical to those of the first worm screw lift and the second worm screw lift, so that the screws of the four worm screw lifts can move up and down synchronously; Lift the lifting platform upwards, thereby driving the material frame to move upwards for loading operations.

2. The device according to claim 1, characterized in that By turning the servo motor on and off at any time, the lifting platform can be adjusted to different height positions.

3. The device according to claim 2, characterized in that The first gear and the second gear are both made of metal material.

4. The device according to claim 3, characterized in that The metal is specifically stainless steel.

5. The device according to claim 4, characterized in that The first gear and the second gear have the same size and thickness.

6. The device according to claim 5, characterized in that The first gear and the second gear should be installed at the same height.

7. The device according to claim 6, characterized in that The servo motor is fixed on the bracket by screw connection.

8. The device according to claim 7, characterized in that The first sprocket and the second sprocket have the same length.

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