CN111906731A - Lifting fixing device for machining and using method thereof - Google Patents

Abstract

The invention discloses a lifting and fixing device for machining and a method of using the same, comprising a lifting mechanism and a fixing component, the lifting mechanism includes a device base, the lifting components are fixedly installed at the four corners of the upper end of the device base, and the device base is An installation frame is fixedly arranged on the upper part, a first reducer is fixedly installed on the installation frame, a first motor is fixedly installed on the first reducer, and the output end of the first motor is connected with the internal gear assembly of the first reducer, In the present invention, the second reducer drives the second drive shaft to rotate, the second drive shaft and the third drive shaft drive four groups of lifting components to work to lift and drive the lifting platform, and the four sets of lifting components work synchronously to ensure the stability of the lifting platform. The two sets of first fixed splints and the two sets of second fixed splints clamp the side walls around the object to be processed, effectively ensuring the stability of the object and thus the stability and precision of the object processing.

Description

A kind of lifting and fixing device for machining and using method thereof

technical field

The present invention relates to the technical field of machining devices, in particular to a lifting and fixing device for machining and a method of using the same.

Background technique

Machining refers to the process of changing the dimensions or performance of a workpiece through a mechanical device. According to the difference in processing methods, it can be divided into cutting processing and pressure processing. No matter what processing method, it needs to be carried out on the workbench. However, most of the existing machining workbenches are simple in structure and single in function, and have the following problems;

1. Most of the existing machining workbenches do not have the height adjustment function, and the height of the workbench is not conducive to the corresponding adjustment according to the different needs of the staff, which is inconvenient to use;

2. Most of the existing machining workbenches only have the bearing function, which is not conducive to fixing the fixture, and does not have the function of spacing adjustment, which is not conducive to clamping and fixing different processing parts;

3. The stability of most of the existing machining workbenches is poor, and it is easy to shake during processing, which slows down the processing progress and affects the processing accuracy of the object.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a lifting and fixing device for machining and a method of using the same. By starting the first motor to drive the first reducer to work, the first reducer reduces the output speed of the first motor, thereby effectively ensuring the lifting and lowering The components are driven slowly to reduce the speed of the lift table rising and falling, which is beneficial to adjust the accuracy of the lift table's rising and falling position. The first reducer drives the first drive shaft and the third drive shaft to rotate, and the first drive shaft drives the first drive shaft. The second reducer works, and the base of the device is provided with a reinforcing component connected with the first drive shaft. By setting the reinforcing component, the first drive shaft is effectively strengthened and protected. The protection effect of the first drive shaft is improved, and the reinforcing sleeve and the first drive shaft are fixed and installed by setting locking screws, which facilitates disassembly and assembly; the second reducer drives the second drive shaft to rotate, and the second drive shaft and the third drive shaft. Drive the four sets of lifting components to work to drive the lifting platform, and the four sets of lifting components work synchronously to ensure the stability of the lifting platform; the second motor works to drive the first screw to rotate, and the first fixed splint is driven to be placed on the The object on the lifting table moves, the first fixed splint moves the pressure plate and the telescopic sleeve to move, and the object is clamped and fixed, and the surrounding side walls of the object to be processed are fixed by two sets of first fixed splints and two sets of second fixed splints. Clamping can effectively ensure the stability of the object to ensure the stability and precision of the object processing.

The object of the present invention can be realized through the following technical solutions:

A lifting and fixing device for machining, comprising a lifting mechanism and a fixing component, the lifting mechanism includes a device base, the lifting components are fixedly installed at the four corners of the upper end of the device base, and a mounting frame is fixedly arranged on the device base, so the A first reducer is fixedly installed on the mounting frame, a first motor is fixedly installed on the first reducer, the output end of the first motor is connected with the internal gear assembly of the first reducer, and the first reducer is respectively connected There are a first drive shaft and a third drive shaft, the third drive shaft is respectively connected with two sets of lifting assemblies close to the first reducer, the end of the first drive shaft is connected with a second reducer, the second The reducer is fixedly installed on the base of the device, the second reducer is connected with a second drive shaft, and the second drive shaft is respectively connected with two sets of lifting assemblies on one side of the second reducer;

The lift assembly includes a lift base and a drive base, the drive base is fixedly connected to the lift base, a lift drive shaft is rotatably connected to the drive base, and a first helical gear is fixedly connected to the lift drive shaft. The fixing sleeve is fixedly installed on the lifting base, the fixing sleeve is slidably connected with the lifting sleeve, the lifting sleeve is provided with a threaded groove, the upper end of the lifting sleeve is fixedly connected with a mounting plate, and the threaded groove of the lifting sleeve A driving screw is threadedly connected to the bottom of the driving screw, a connecting rod is fixedly connected to the lower end of the driving screw, the connecting rod is rotatably connected to the lifting base, a fourth helical gear is fixedly installed on the connecting rod, and a fourth helical gear is fixedly installed on the lifting base. a fixing seat, a connecting shaft is connected through the fixing seat, the connecting shaft is rotatably connected with the fixing seat, one end of the connecting shaft is fixedly connected with a second helical gear, and the other end of the connecting shaft is fixedly connected with a third helical gear. The second helical gear is meshed with the first helical gear, and the third helical gear is meshed with the fourth helical gear;

A lifting platform is fixedly connected to the upper end of the mounting plate, and the fixing assembly is arranged on the lifting platform.

As a further solution of the invention, the fixing assembly includes a first vertical plate and a connecting top plate, the first vertical plate is provided with four groups located at the four corners of the lifting platform, the connecting top plate is provided with two groups, and the two groups are respectively connected to the top plate Connected to the first vertical plate at the front and rear ends of the lifting platform, the upper end of the lifting platform is fixedly connected with a first mounting seat, the first vertical plate is fixedly installed with a second motor, and the output end of the second motor is connected with a The first screw, the end of the first screw away from the second motor is rotatably connected to the first mounting seat, the first screw is threadedly connected with a first fixed splint, and the first fixed splint is slidably connected to the lifting platform , the upper end of the first fixing splint is slidingly attached to the lower surface of the connecting top plate.

As a further solution of the invention, two sets of second vertical plates are symmetrically arranged on the connecting top plate, a second mounting seat is fixedly connected to the lifting platform, a third motor is fixedly installed on the second vertical plate, and the A second screw rod is connected to the output end of the third motor, the end of the second screw rod away from the third motor is rotatably connected to the second mounting seat, a sliding plate is threadedly connected to the second screw rod, and the lower end of the sliding plate is fixedly connected There is a second fixed splint, and the lower end of the second fixed splint is slidably connected to the lifting platform.

As a further solution of the invention, the second fixed splint is located between the two sets of first fixed splints, both sides of the second fixed splint are connected with a telescopic sleeve, and an end of the telescopic sleeve is connected with a pressure plate.

As a further solution of the invention, several groups of mounting holes are arranged in an annular array on the mounting plate, and the mounting plate is fixedly connected to the lifting platform through screws.

As a further solution of the invention, a reinforcing component is fixedly installed on the base of the device, and the reinforcing component is connected with the first drive shaft.

As a further solution of the invention, the reinforcement assembly includes a support frame, a bearing seat is fixedly installed on the support frame, a bearing is fixedly installed in the bearing seat, and the first drive shaft is fixedly connected to the inner ring of the bearing.

As a further solution of the invention, a reinforcing sleeve is fixedly connected to the inner ring of the bearing, the first drive shaft is connected to the reinforcing sleeve, and a locking screw is threadedly connected to the reinforcing sleeve.

A method of using a lifting and fixing device for machining, the using method specifically comprises the following steps:

Step 1: Start the first motor to drive the first reducer to work, the first reducer reduces the output speed of the first motor, the first reducer drives the first drive shaft and the third drive shaft to rotate, and the first drive shaft drives the first drive shaft. The second reducer works, the second reducer drives the second drive shaft to rotate, and the second drive shaft and the third drive shaft drive the four groups of lifting components to work to drive the lifting platform to lift;

Step 2: The second drive shaft and the third drive shaft drive the lift drive shaft to rotate, the lift drive shaft drives the first helical gear to rotate, drives the second helical gear and the third helical gear to rotate through gear meshing transmission, and the third helical gear drives the first helical gear to rotate. The four helical gears and the driving screw rotate, and the driving screw is threadedly connected with the lifting sleeve, thereby driving the lifting sleeve to move up and down along the fixed sleeve, thereby driving the lifting platform to move up and down;

Step 3: Drive the lifting table to move up and down through the lifting component, so that the machining process moves to the corresponding position, and the object to be processed is placed above the lifting table. The third motor works to drive the second screw to rotate, which is driven by the principle of screw transmission. The two sets of sliding plates move toward the object, and the second fixed splint arranged at the lower end of the two sets of sliding plates clamps the objects placed on the lifting platform;

Step 4: The second motor drives the first screw to rotate, and drives the first fixed splint to move toward the object placed on the lifting platform through the screw drive principle. When the first fixed splint moves, it drives the pressure plate and the telescopic sleeve to move to move the object. Clamping and fixing to realize the mechanical processing of the object.

The beneficial effects of the present invention are: by starting the first motor to drive the first reducer to work, the first reducer reduces the output speed of the first motor, thereby effectively ensuring the slow drive of the lifting assembly and reducing the speed of the lifting and lowering of the lifting platform. , which is conducive to adjusting the accuracy of the lifting and lowering positions of the lifting platform. The first reducer drives the first drive shaft and the third drive shaft to rotate, and the first drive shaft drives the second reducer to work. The reinforcing assembly connected to the drive shaft can effectively strengthen the protection of the first drive shaft by setting the reinforcing assembly, ensure the rotation of the first drive shaft by setting the bearing, and improve the protection effect of the first drive shaft by the reinforcing sleeve. Tighten the screw to fix the reinforcement sleeve and the first drive shaft, which is convenient for disassembly and assembly;

The second reducer drives the second drive shaft to rotate, and the second drive shaft and the third drive shaft drive four sets of lifting components to work to drive the lifting platform up and down, and the four sets of lifting components work synchronously to ensure the stability of the lifting platform;

The second drive shaft and the third drive shaft drive the lift drive shaft to rotate, the lift drive shaft drives the first helical gear to rotate, the second helical gear and the third helical gear are driven to rotate through the gear meshing transmission, and the third helical gear drives the fourth helical gear. It rotates with the driving screw, and the driving screw is threadedly connected with the lifting sleeve, so as to drive the lifting sleeve to move up and down along the fixed sleeve, thereby driving the lifting platform to move up and down. disassembly and installation;

The lifting table is driven by the lifting component to move up and down, so that the machining process moves to the corresponding position, and the objects to be processed are placed above the lifting table. The plate moves toward the object, and the second fixed splint set at the lower end of the two sets of sliding plates clamps the object placed on the lifting platform;

The second motor drives the first screw to rotate, and drives the first fixed splint to move toward the object placed on the lifting platform through the principle of screw transmission. When the first fixed splint moves, it drives the pressure plate and the telescopic sleeve to move to clamp and fix the object. , through two sets of first fixed splints and two sets of second fixed splints to clamp the surrounding side walls of the object to be processed, effectively ensuring the stability of the object and thus ensuring the stability and accuracy of the object processing.

Description of drawings

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the structure schematic diagram of the lifting mechanism of the present invention;

Fig. 3 is the axonometric structure schematic diagram of Fig. 2 of the present invention;

4 is a schematic structural diagram of a lifting assembly of the present invention;

5 is a schematic diagram of the internal structure of the lifting assembly of the present invention;

6 is a schematic diagram of the assembly structure of the first helical gear and the second helical gear of the present invention;

7 is a schematic structural diagram of a reinforcing assembly of the present invention;

8 is a schematic side view of the structure of the fixing assembly of the present invention;

9 is a schematic diagram of the assembly structure of the second fixed splint of the present invention;

In the figure: 1, the device base; 2, the mounting frame; 3, the first reducer; 4, the first motor; 5, the first drive shaft; 6, the reinforcement assembly; 61, the support frame; 62, the bearing seat; 63, Bearing; 64, Reinforcement sleeve; 65, Locking screw; 7, Second reducer; 8, Lifting assembly; 81, Lifting base; 82, Drive seat; 83, Lifting drive shaft; 84, Fixing sleeve; 85, Lifting sleeve 86, mounting plate; 87, drive screw; 88, fourth helical gear; 89, connecting rod; 810, first helical gear; 811, fixing seat; 812, second helical gear; 813, third helical gear; 814 10, the second drive shaft; 11, the third drive shaft; 12, the first vertical plate; 13, the second motor; 14, the first mounting seat; 15, the first screw rod; 16 , the first fixed splint; 17, the connecting top plate; 18, the second vertical plate; 19, the third motor; 20, the second mounting seat; 21, the second screw; 22, the sliding plate; 23, the second fixed plate; 24 , telescopic sleeve; 25, pressure plate.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-9, a lifting and fixing device for machining includes a lifting mechanism and a fixing component. The lifting mechanism includes a device base 1, and the lifting components 8 are fixedly installed at the four corners of the upper end of the device base 1. A mounting frame 2 is fixedly installed on the device base 1, a first reducer 3 is fixedly installed on the mounting frame 2, a first motor 4 is fixedly installed on the first reducer 3, and the first motor 4 The output end is connected to the internal gear assembly of the first reducer 3. The first reducer 3 is connected with a first drive shaft 5 and a third drive shaft 11 respectively, and the third drive shaft 11 is connected to the first reducer. The two sets of lifting assemblies 8 of 3 are connected, the end of the first drive shaft 5 is connected with a second reducer 7, the second reducer 7 is fixedly installed on the device base 1, and the second reducer 7 is connected There is a second drive shaft 10, and the second drive shaft 10 is respectively connected with two sets of lifting assemblies 8 on one side of the second reducer 7;

The lift assembly 8 includes a lift base 81 and a drive base 82, the drive base 82 is fixedly connected to the lift base 81, the drive base 82 is rotatably connected to a lift drive shaft 83, and the lift drive shaft 83 is fixedly connected There is a first helical gear 810, the fixing sleeve 84 is fixedly installed on the lifting base 81, the fixing sleeve 84 is slidably connected with a lifting sleeve 85, the lifting sleeve 85 is provided with a threaded groove, and the lifting sleeve 85 A mounting plate 86 is fixedly connected to the upper end, a driving screw 87 is threadedly connected to the threaded groove of the lifting sleeve 85, and a connecting rod 89 is fixedly connected to the lower end of the driving screw 87, and the connecting rod 89 is rotatably connected to the lifting base 81 , a fourth helical gear 88 is fixedly installed on the connecting rod 89, a fixing seat 811 is fixedly arranged on the lifting base 81, and a connecting shaft 814 is connected through the fixing seat 811, and the connecting shaft 814 is connected with the fixing seat. 811 is connected in rotation, one end of the connecting shaft 814 is fixedly connected with a second helical gear 812, and the other end is fixedly connected with a third helical gear 813, the second helical gear 812 is meshed with the first helical gear 810, and the first helical gear 810 is connected. The third helical gear 813 is meshed with the fourth helical gear 88;

A lift table 9 is fixedly connected to the upper end of the mounting plate 86 , and the fixing assembly is arranged on the lift table 9 .

The fixing assembly includes a first vertical plate 12 and a connecting top plate 17. The first vertical plate 12 is provided with four groups located at the four corners of the lifting platform 9, respectively. The connecting top plate 17 is provided with two groups. Connected to the first vertical plate 12 at the front and rear ends of the lifting platform 9, a first mounting seat 14 is fixedly connected to the center of the upper end of the lifting platform 9, and a second motor 13 is fixedly installed on the first vertical plate 12. A first screw 15 is connected to the output end of the second motor 13 , the end of the first screw 15 away from the second motor 13 is rotatably connected to the first mounting seat 14 , and the first screw 15 is threadedly connected with a first fixed splint 16 , the first fixed splint 16 is slidably connected to the lifting platform 9 , and the upper end of the first fixed splint 16 is slidably attached to the lower surface of the connecting top plate 17 .

Two sets of second vertical plates 18 are symmetrically arranged on the connecting top plate 17 , a second mounting seat 20 is fixedly connected to the lifting platform 9 , and a third motor 19 is fixedly installed on the second vertical plate 18 . The output end of the third motor 19 is connected with a second screw 21, the end of the second screw 21 away from the third motor 19 is rotatably connected to the second mounting seat 20, and the second screw 21 is screwed with a sliding plate 22, The lower end of the sliding plate 22 is fixedly connected with a second fixing plate 23 , and the lower end of the second fixing plate 23 is slidably connected to the lifting platform 9 .

The second fixed splint 23 is located between the two sets of the first fixed splint 16 , both sides of the second fixed splint 23 are connected with a telescopic sleeve 24 , and an end of the telescopic sleeve 24 is connected with a pressure plate 25 .

Several groups of mounting holes are arranged in an annular array on the mounting plate 86 , and the mounting plate 86 is fixedly connected to the lifting platform 9 through screws.

A reinforcement assembly 6 is fixedly mounted on the device base 1 , and the reinforcement assembly 6 is connected with the first drive shaft 5 .

The reinforcement assembly 6 includes a support frame 61 , a bearing seat 62 is fixedly installed on the support frame 61 , a bearing 63 is fixedly installed in the bearing seat 62 , and the first drive shaft 5 is fixedly connected to the inner ring of the bearing 63 .

A reinforcing sleeve 64 is fixedly connected to the inner ring of the bearing 63 , the first drive shaft 5 is connected to the reinforcing sleeve 64 , and a locking screw 65 is threadedly connected to the reinforcing sleeve 64 .

A method of using a lifting and fixing device for machining, the using method specifically comprises the following steps:

Step 1: Start the first motor 4 to drive the first reducer 3 to work, the first reducer 3 reduces the output speed of the first motor 4, and the first reducer 3 drives the first drive shaft 5 and the third drive shaft 11 to rotate , the first drive shaft 5 drives the second reducer 7 to work, the second reducer 7 drives the second drive shaft 10 to rotate, the second drive shaft 10 and the third drive shaft 11 drive the four groups of lifting assemblies 8 to work on the lifting platform 9 lift drive;

Step 2: The second drive shaft 10 and the third drive shaft 11 drive the lift drive shaft 83 to rotate, the lift drive shaft 83 drives the first helical gear 810 to rotate, and drives the second helical gear 812 and the third helical gear 813 to rotate through gear meshing transmission The third helical gear 813 drives the fourth helical gear 88 and the driving screw 87 to rotate, and the driving screw 87 is threadedly connected with the lifting sleeve 85, thereby driving the lifting sleeve 85 to move up and down along the fixed sleeve 84, thereby driving the lifting platform 9 to move up and down. ;

Step 3: Drive the lift table 9 to move up and down through the lift assembly 8, move the machining to the corresponding position, place the object to be processed on the lift table 9, and the third motor 19 works to drive the second screw 21 to rotate. The principle of screw drive drives the two sets of sliding plates 22 to move toward the object, and the second fixed splint 23 provided at the lower end of the two sets of sliding plates 22 clamps the objects placed on the lifting platform 9;

Step 4: The second motor 13 works to drive the first screw 15 to rotate, and drives the first fixed splint 16 to move toward the object placed on the lifting platform 9 through the screw drive principle. When the first fixed splint 16 moves, it drives the pressure plate 25 and the telescopic The sleeve 24 moves to clamp and fix the object, so as to realize the mechanical processing of the object.

When the present invention is in use, the first motor 4 is started to drive the first reducer 3 to work, and the first reducer 3 reduces the output speed of the first motor 4, thereby effectively ensuring the slow drive of the lifting assembly 8 and lowering the lifting platform 9. The speed of ascending and descending is conducive to adjusting the accuracy of the ascending and descending position of the lifting platform 9. The first reducer 3 drives the first drive shaft 5 and the third drive shaft 11 to rotate, and the first drive shaft 5 drives the second reducer. 7 Work, the device base 1 is provided with a reinforcing assembly 6 connected with the first drive shaft 5, the reinforcing assembly 6 is provided to effectively strengthen the protection of the first drive shaft 5, and the first drive shaft 5 is ensured by setting the bearing 63. The reinforcing sleeve 64 improves the protection effect of the first drive shaft 5, and the reinforcing sleeve 64 and the first drive shaft 5 are fixedly installed by setting the locking screw 65, which is convenient for disassembly and assembly, and the second reducer 7 drives the second drive shaft. 10 rotates, the second drive shaft 10 and the third drive shaft 11 drive the four groups of lifting assemblies 8 to work to lift the lifting table 9, and the four groups of lifting assemblies 8 work synchronously to ensure the stability of the lifting table 9; the second driving shaft 10 and the third drive shaft 11 drive the lift drive shaft 83 to rotate, the lift drive shaft 83 drives the first helical gear 810 to rotate, drives the second helical gear 812 and the third helical gear 813 to rotate through gear meshing transmission, and the third helical gear 813 drives the first helical gear 813 to rotate. The four helical gears 88 and the driving screw 87 rotate, and the driving screw 87 is threadedly connected with the lifting sleeve 85, thereby driving the lifting sleeve 85 to move up and down along the fixing sleeve 84, thereby driving the lifting table 9 to move up and down, and the lifting table 9 is fixed and installed by bolts On the mounting plate 86, the lifting platform 9 can be easily disassembled and installed; the lifting platform 9 is driven by the lifting assembly 8 to move up and down, so that the machining process is moved to the corresponding position, and the objects to be processed are placed above the lifting platform 9, The third motor 19 works to drive the second screw 21 to rotate, and drives the two sets of sliding plates 22 to move toward the object through the principle of screw transmission. Clamping; the second motor 13 works to drive the first screw 15 to rotate, and drives the first fixed splint 16 to move toward the object placed on the lifting platform 9 through the screw drive principle, and the first fixed splint 16 drives the pressure plate 25 and the telescopic plate when moving. The sleeve 24 moves to clamp and fix the object, and the side walls around the object to be processed are clamped by the two sets of first fixed splints 16 and the two sets of second fixed splints 23, which effectively ensures the stability of the object and thus ensures the processing of the object. stability and precision.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for convenience The invention is described and simplified without indicating or implying that the device or element referred to must have a particular orientation, as well as a particular orientation configuration and operation, and therefore should not be construed as limiting the invention. In addition, "first" and "second" are for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

An embodiment of the present invention has been described in detail above, but the content is only a preferred embodiment of the present invention, and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still belong to the scope of the patent of the present invention.

Claims (9)

1. A lifting and fixing device for machining, comprising a lifting mechanism and a fixing assembly, wherein the lifting mechanism comprises a device base (1), and the upper four corners of the device base (1) are fixedly installed with a lifting assembly ( 8), an installation frame (2) is fixedly arranged on the device base (1), a first reducer (3) is fixedly installed on the installation frame (2), and the first reducer (3) is fixed on the A first motor (4) is installed, the output end of the first motor (4) is connected with the internal gear assembly of the first reducer (3), and the first reducer (3) is respectively connected with a first drive shaft ( 5) and a third drive shaft (11), the third drive shaft (11) is respectively connected with two sets of lifting assemblies (8) close to the first reducer (3), and the end of the first drive shaft (5) The part is connected with a second reducer (7), the second reducer (7) is fixedly mounted on the device base (1), and the second reducer (7) is connected with a second drive shaft (10), The second drive shaft (10) is respectively connected with two sets of lift assemblies (8) on one side close to the second reducer (7); The lift assembly (8) includes a lift base (81) and a drive base (82), the drive base (82) is fixedly connected to the lift base (81), and a lift drive is rotatably connected to the drive base (82). A shaft (83), a first helical gear (810) is fixedly connected to the lifting drive shaft (83), the fixing sleeve (84) is fixedly installed on the lifting base (81), and the fixing sleeve (84) A lifting sleeve (85) is slidably connected, a threaded groove is provided on the lifting sleeve (85), a mounting plate (86) is fixedly connected to the upper end of the lifting sleeve (85), and the threaded groove of the lifting sleeve (85) A driving screw (87) is threadedly connected to the groove, a connecting rod (89) is fixedly connected to the lower end of the driving screw (87), and the connecting rod (89) is rotatably connected to the lifting base (81). 89) A fourth helical gear (88) is fixedly installed, a fixing seat (811) is fixedly arranged on the lifting base (81), and a connecting shaft (814) is connected through the fixing seat (811). The connecting shaft (814) is rotatably connected with the fixing seat (811), one end of the connecting shaft (814) is fixedly connected with a second helical gear (812), and the other end of the connecting shaft (814) is fixedly connected with a third helical gear (813). The second helical gear (812) is engaged with the first helical gear (810), and the third helical gear (813) is engaged with the fourth helical gear (88); A lift table (9) is fixedly connected to the upper end of the mounting plate (86), and the fixing assembly is arranged on the lift table (9). 2 . The lifting and fixing device for machining according to claim 1 , wherein the fixing assembly comprises a first vertical plate ( 12 ) and a connecting top plate ( 17 ), and the first vertical plate ( 12 ) Four groups are provided at the four corner positions of the lifting platform (9) respectively, the connecting top plates (17) are provided with two groups, and the two connecting top plates (17) are respectively connected to the first vertical plates (12) at the front and rear ends of the lifting platform (9). A first mounting seat (14) is fixedly connected to the center of the upper end of the lifting platform (9), a second motor (13) is fixedly mounted on the first vertical plate (12), and the second motor (13) ) The output end is connected with a first screw (15), the end of the first screw (15) away from the second motor (13) is rotatably connected to the first mounting seat (14), and the first screw (15) A first fixed splint (16) is threadedly connected, the first fixed splint (16) is slidably connected to the lifting platform (9), and the upper end of the first fixed splint (16) is slidably attached to the lower surface of the connecting top plate (17). combine. 3. The lifting and fixing device for machining according to claim 2, wherein two sets of second vertical plates (18) are symmetrically arranged on the connecting top plate (17), and the lifting platform (9) A second mounting seat (20) is fixedly connected thereon, a third motor (19) is fixedly mounted on the second vertical plate (18), and a second screw (21) is connected to the output end of the third motor (19). , the end of the second screw (21) away from the third motor (19) is rotatably connected to the second mounting seat (20), the second screw (21) is threadedly connected with a sliding plate (22), the The lower end of the sliding plate (22) is fixedly connected with a second fixing splint (23), and the lower end of the second fixing splint (23) is slidably connected to the lifting platform (9). 4 . The lifting and fixing device for machining according to claim 3 , wherein the second fixing splint ( 23 ) is located between two sets of first fixing splints ( 16 ), and the second fixing splint (23) A telescopic sleeve (24) is connected to both sides, and a pressure plate (25) is connected to the end of the telescopic sleeve (24). 5 . The lifting and fixing device for machining according to claim 1 , wherein several groups of mounting holes are arranged in an annular array on the mounting plate ( 86 ), and the mounting plate ( 86 ) is lifted and lowered by screws. 6 . The table (9) is fixedly connected. 6 . The lifting and fixing device for machining according to claim 1 , wherein a reinforcing component ( 6 ) is fixedly installed on the device base ( 1 ), and the reinforcing component ( 6 ) is connected to the first drive unit 6 . The shaft (5) is connected. 7 . The lifting and fixing device for machining according to claim 6 , wherein the reinforcing assembly ( 6 ) comprises a support frame ( 61 ), and a bearing seat ( 61 ) is fixedly mounted on the support frame ( 61 ). 8 . 62), a bearing (63) is fixedly installed in the bearing seat (62), and the first drive shaft (5) is fixedly connected to the inner ring of the bearing (63). 8 . The lifting and fixing device for machining according to claim 7 , wherein a reinforcing sleeve ( 64 ) is fixedly connected to the inner ring of the bearing ( 63 ), and the first drive shaft ( 5 ) is connected to the On the reinforcing sleeve (64), a locking screw (65) is threadedly connected to the reinforcing sleeve (64). 9. A method of using a lifting and fixing device for machining, characterized in that the using method specifically comprises the following steps: Step 1: start the first motor (4) to drive the first reducer (3) to work, the first reducer (3) reduces the output speed of the first motor (4), and the first reducer (3) drives the first reducer (3). The drive shaft (5) and the third drive shaft (11) rotate, the first drive shaft (5) drives the second reducer (7) to work, the second reducer (7) drives the second drive shaft (10) to rotate, and the second reducer (7) drives the second drive shaft (10) to rotate. The second drive shaft (10) and the third drive shaft (11) drive four sets of lifting assemblies (8) to work to lift and drive the lifting platform (9); Step 2: The second drive shaft (10) and the third drive shaft (11) drive the lift drive shaft (83) to rotate, the lift drive shaft (83) drives the first helical gear (810) to rotate, and drives the second helical gear (810) through gear meshing transmission. The helical gear (812) and the third helical gear (813) rotate, the third helical gear (813) drives the fourth helical gear (88) and the driving screw (87) to rotate, and the driving screw (87) and the lifting sleeve (85) threaded connection, thereby driving the lifting sleeve (85) to move up and down along the fixing sleeve (84), thereby driving the lifting platform (9) to move up and down; Step 3: Drive the lift table (9) to move up and down through the lift assembly (8), move the machining to the corresponding position, place the object to be processed on the lift table (9), and the third motor (19) works The second screw (21) is driven to rotate, and the two sets of sliding plates (22) are driven to move towards the object through the principle of screw transmission. ) is clamped; Step 4: The second motor (13) works to drive the first screw (15) to rotate, and drives the first fixed splint (16) to move towards the object placed on the lifting platform (9) through the screw drive principle, and the first fixed splint (16) When moving, the pressing plate (25) and the telescopic sleeve (24) are driven to move, the objects are clamped and fixed, and the mechanical processing of the objects is realized.

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