CN211867523U - Semi-automatic material spreading machine - Google Patents

Abstract

The utility model provides a semi-automatic spreader, wherein the moving slider is slidingly matched with a moving base, a lifting device is arranged on one side of the moving slider, one side of the lifting device is fixedly connected to a lifting platform, and the lifting platform is on the lifting platform. There is a feeding mechanism, the feeding support plate of the feeding mechanism is fixedly connected with the lifting platform, the end of the lifting platform away from the lifting device is slidably connected to the pressing mechanism, and the side of the pressing mechanism away from the lifting platform is provided with a pressing mechanism The support column is slidingly connected with the lifting platform, the lower end of the unloading mechanism is provided with a rotating mechanism, the mold is placed on the rotating platform of the rotating mechanism, and the centering mechanism is arranged on the peripheral side of the rotating platform. The spread material is centered on the mold by the centering mechanism, the mold is rotated by the rotating mechanism, the material is cut by the blanking mechanism, and the pressing mechanism is pressed, so as to solve the uneven artificial spread and reduce the spread time, thereby reducing the factory. benefit is reduced.

Description

A semi-automatic spreader

technical field

The utility model relates to the technical field of grinding wheel manufacturing, in particular to a semi-automatic spreader.

Background technique

In the process of grinding wheel production, the material is spread manually. Due to the large loss of raw materials of the grinding wheel and the uneven spread of the material, the quality of the final grinding wheel is caused by the artificial spread. The automatic grinding wheel spreader is used to reduce the spread time and solve the problem of uneven spread.

Utility model content

The technical problems to be solved by the utility model are the unevenness of artificial spreading and the reduction of the spreading time. In order to solve the above problems, the utility model provides a semi-automatic spreading machine.

The purpose of this utility model is to realize in the following way:

A semi-automatic spreader includes a frame, a movable base is arranged above the frame, a movable slider is arranged above the movable base, the movable slider is slidably matched with the movable base, and a side of the movable slider is arranged. There is a lifting device, one side of the lifting device is fixedly connected to the lifting platform, the lifting platform is provided with a blanking mechanism, the blanking support plate of the blanking mechanism is fixedly connected to the lifting platform, and the lifting platform slides away from one end of the lifting device Connect the pressing mechanism, the side of the pressing mechanism away from the lifting platform is provided with a pressing support column, the pressing support column is slidingly connected with the lifting platform, and a rotating mechanism is arranged at the lower end of the unloading mechanism. A mold is placed above, and a centering mechanism is arranged on the peripheral side of the rotating platform.

The movable base is provided with a movable sliding rail, the movable sliding block is slidably connected with the movable sliding rail, a movable screw rod is arranged in the middle of the movable sliding rail, the movable screw rod is hinged with the movable sliding rail, and one end of the movable screw rod is provided with a movable sliding rail. The turntable, the moving turntable is fixedly connected with the moving screw rod, the moving slider is connected to the moving screw rod through the screw thread, and the moving screw rod drives the moving slider to move on the moving slide rail.

The feeding mechanism also includes a stirring motor, a feeding coupling, a bin cover, a bin and an auger. The bin cover is hinged with the feeding support plate, and is fixedly connected at the middle of the upper end of the feeding support plate through a feeding connecting flange. The stirring motor, the lower end of the unloading support plate is fixedly connected to the silo, the auger is arranged inside the silo, the stirring motor is connected to the auger through the unloading coupling, and the outer wall of the silo is provided with a vibration motor, the first vibration motor The silo is fixedly connected through the first vibration base, and the annular silo is fixedly connected to the outlet end below the silo through the connecting plate. The outer wall of the annular silo is provided with a second vibration motor, and the second vibration motor is vibrated by the second vibration The base is connected to the annular silo.

The cross section of the annular silo is Y-shaped, and the outlet end below the annular silo is used in cooperation with the mold.

The pressing mechanism also includes a pressing motor, an eccentric wheel and a buffer assembly. The pressing motor is arranged at the upper end of the pressing support plate, the working end of the pressing motor is connected to the eccentric wheel, and the lower end of the pressing supporting plate is provided with a pressing force. A connecting plate, one end of the lowering connecting plate is hinged with the eccentric wheel, the other end of the lowering connecting plate is hinged with a buffer assembly, the lower end of the buffering assembly is hinged and the lowering sliding plate is hinged, and the lower end of the lowering sliding plate is hinged with a pressure block, the lowering One side of the connecting plate is provided with a pressing down fixing plate, the pressing down fixing plate is fixed on the lower end of the pressing down supporting plate by bolts, a fixed sliding block is arranged on one side of the pressing down fixing plate, and a sliding rail is arranged on the pressing down sliding plate, The pressing down sliding plate is slidably connected with the pressing down fixing plate through the sliding rail.

The buffer assembly includes an upper connecting plate and a lower connecting plate, the lower end of the upper connecting plate is fixedly connected to the upper connecting shaft, the upper end of the lower connecting plate is fixedly connected to the lower connecting pipe, the upper connecting shaft is sleeved in the lower connecting pipe, and is connected to the upper A buffer spring is fixedly connected between the plate and the lower connecting plate.

The upper end of the upper connecting plate is hinged with the lowering connecting plate, and the lower end of the lower connecting plate is hinged with the lowering sliding plate.

The lifting device includes a lifting motor, a lifting screw and a second lifting slider, the lifting motor is fixed on the upper end of the moving slider, the working end of the lifting motor is connected to the lifting screw through a coupling, and the lifting screw is hinged with the moving slider , the second lifting slider and the lifting screw are matched and connected through the ball screw pair, and the second lifting slider is fixedly connected with the lifting platform.

The rotating mechanism includes a rotating motor, a rotating disk and a rotating support, the rotating disk is arranged in the middle of the working platform of the frame, the lower end of the rotating disk is connected to the rotating motor through a rotating coupling, and the rotating motor is fixed on the rotating support through the rotating support. below the work platform.

The centering mechanism includes oppositely arranged centering plates, the centering plates are slidably matched with the working platform, and a centering connecting plate is arranged under the working platform, and the centering connecting plate is fixedly connected to the centering by the centering straight plate The centering connecting plate is fixedly connected to the centering screw nut, the centering screw nut is threadedly connected to the centering screw, the centering screw is hinged to the working platform through the centering support, and a centering screw is provided on one side of the centering screw. The centering turntable is fixedly connected to the centering screw, one side of the centering connecting plate is fixedly connected to the centering slider, the centering slider is slidably connected to the centering slide rail, and the centering slide rail is fixed under the working platform, Hinged alignment bearings at both ends of the alignment plate.

Compared with the prior art, the utility model can center the mold through the centering mechanism for the spreading of the grinding wheel, rotate the mold through the rotating mechanism, the blanking mechanism performs blanking, and the lowering mechanism performs pressing, so as to solve the problem of manual spreading. Non-uniformity and reduced spread times reduce plant profitability.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is an enlarged schematic view of A in FIG. 1 .

Figure 3 is a schematic diagram of the installation of the stirring motor of the feeding mechanism.

Figure 4 is a schematic view of the structure of the annular silo.

FIG. 5 is a schematic structural diagram of the pressing mechanism.

FIG. 6 is a schematic diagram of the structure of the buffer assembly.

FIG. 7 is a cross-sectional view in the direction B of FIG. 6 .

Figure 8 is a schematic diagram of the installation of the mold.

FIG. 9 is a schematic diagram of the structure of the centering mechanism.

FIG. 10 is a schematic structural diagram of a rotating mechanism.

Figure 11 is a schematic diagram of the installation of the lifting device.

FIG. 12 is an enlarged schematic view of C in FIG. 1 .

Among them, 1. Rack, 2. Working platform, 3. Controller, 4. Moving turntable, 5. Moving slider, 6. Lifting device, 61. Lifting motor, 62. Second lifting slider, 63. Lifting screw , 7. Mobile base, 71. Mobile slide, 8. Mobile screw, 9. Press support column, 901. Lifting slide, 10. Lifting platform, 101. Horizontal slide, 11. Unloading mechanism, 1101. Stirring Motor, 1102. Feeding coupling, 1103. Feeding connection flange, 1104. Feeding support plate, 1105. Silo cover, 1106. Silo, 1107. Auger, 1108. First vibration motor, 1109. Ring Silo, 1110. Second vibration motor, 1111. Discharge pipe, 12. First lifting slider, 13. Die, 14. Centering mechanism, 1401. Centering turntable, 1402. Centering screw, 1403. Centering Plate, 1404. Centering bearing, 1405. Centering straight plate, 1406. Centering connecting plate, 1407. Centering support, 1408. Centering nut, 1410. Centering slider, 1411. Centering slide, 15 . Scraper, 16. Scraper bracket, 17. Press down mechanism, 1701. Press down motor, 1702. Eccentric wheel, 1704. Press down connection plate, 1705. Press down support plate, 1706. Press down slider, 1707. Buffer assembly, 1708. Press down the sliding plate, 1709. Press down the fixed plate, 1710. Fixed the slider, 1711. Press block, 1712. Upper connecting plate, 1713. Upper connecting shaft, 1714. Lower connecting pipe, 1715. Lower connection Plate, 1716. Buffer spring, 1717. Sliding rail, 19. Ball, 20. Rotating mechanism, 201. Rotating motor, 202. Rotating coupling, 203. Rotating support, 204. Rotating disc.

Detailed ways

As shown in Figures 1 to 12, a semi-automatic spreader includes a frame 1, a movable base 7 is arranged above the frame 1, and a movable slider 5 is arranged above the movable base 7. The block 5 is slidably matched with the moving base 7, and a lifting device 6 is arranged on one side of the moving slider 5, and one side of the lifting device 6 is fixedly connected to the lifting platform 10. The unloading support plate 1104 of the mechanism 11 is fixedly connected with the lifting platform 10, and the fixing method is bolt connection. The end of the lifting platform 10 away from the lifting device 6 is slidably connected to the pressing mechanism 17. A push-down slider 1706 is provided, the lifting platform 10 is provided with a lateral slide rail 101, the push-down slide block 1706 is used in conjunction with the lateral slide rail 101, and a push-down support is provided on the side of the push-down mechanism 17 away from the lift platform 10 Column 9, the push-down support column 9 is slidably connected with the lift platform 10, the push-down support column 9 is provided with a lift rail 901, and the end of the lift platform 10 away from the lift device 6 is provided with a first lift slide block 12. The first lifting slider 12 is fixed under the lifting platform 10, the lifting sliding rail 901 is used in cooperation with the first lifting slider 12, a rotating mechanism 20 is provided at the lower end of the unloading mechanism 11, and the mold 13 is placed above the rotating platform of the rotating mechanism 20, A centering mechanism 14 is provided on the peripheral side of the rotating platform.

The moving base 7 is provided with a moving sliding rail 71 , the moving slider 5 is slidably connected with the moving sliding rail 71 , and a moving screw 8 is arranged in the middle of the moving sliding rail 71 , and the moving screw 8 is hinged with the moving sliding rail 71 . , There is a moving turntable 4 at one end of the moving screw 8, the moving turntable 4 is fixedly connected with the moving screw 8, the moving slider 5 is connected to the moving screw 8 through a threaded connection, and the moving screw 8 drives the moving slider 5 to move on the moving slide rail 71. , the moving screw 8 and the moving slider 5 are connected by a ball screw pair.

The feeding mechanism 11 also includes a stirring motor 1101, a feeding coupling 1102, a bin cover 1105, a bin 1106 and an auger 1107. The bin cover 1105 is hinged with the feeding support plate 1104, and is on the upper end of the feeding support plate 1104. The middle part is fixedly connected to the stirring motor 1101 through the blanking connection flange 1103, the lower end of the blanking support plate 1104 is fixedly connected to the silo 1106, and the auger 1107 is arranged inside the silo 1106, and the stirring motor 1101 is connected to the auger through the blanking coupling 1102. 1107, a vibration motor is provided on the outer wall of the silo 1106, the first vibration motor 1108 is fixedly connected to the silo 1106 through the first vibration base, and the outlet end below the silo 1106 is fixedly connected to the annular silo 1109 through the connecting plate, so The outer wall of the annular silo 1109 is provided with a second vibration motor 1110, and the second vibration motor 1110 is connected to the annular silo 1109 through a second vibration base.

The cross section of the annular silo 1109 is Y-shaped, and the outlet end below the annular silo 1109 is used in conjunction with the curvature of the mold 13 .

The pressing mechanism 17 further includes a pressing motor 1701, an eccentric wheel 1702 and a buffer assembly 1707. The pressing motor 1701 is arranged on the upper end of the pressing support plate 1705, and the working end of the pressing motor 1701 is connected to the eccentric wheel 1702. The lower end of the support plate 1705 is provided with a pressing connecting plate 1704, one end of the pressing connecting plate 1704 is hinged with the eccentric wheel 1702, the other end of the pressing connecting plate 1704 is hinged with a buffer assembly 1707, and the lower end of the buffer assembly 1707 is hinged with the pressing sliding plate 1708. , the lower end of the push-down sliding plate 1708 is hinged to the pressing block 1711, and one side of the push-down connecting plate 1704 is provided with a push-down fixing plate 1709, which is fixed to the lower end of the push-down support plate 1705 by bolts, A fixed slider 1710 is provided on one side of the pressing and fixing plate 1709 , and a sliding rail 1717 is arranged on the pressing and fixing plate 1708 .

The buffer assembly 1707 includes an upper connecting plate 1712 and a lower connecting plate 1715, the lower end of the upper connecting plate 1712 is fixedly connected to the upper connecting shaft 1713, the upper end of the lower connecting plate 1715 is fixedly connected to the lower connecting pipe 1714, and the upper connecting shaft 1713 is sleeved In the lower connecting pipe 1714, a buffer spring 1716 is fixedly connected between the upper connecting plate 1712 and the lower connecting plate 1715.

The upper end of the upper connecting plate 1712 is hinged with the lowering connecting plate 1704 , and the lower end of the lower connecting plate 1715 is hinged with the lowering sliding plate 1708 .

The lifting device 6 includes a lifting motor 61, a lifting screw 63 and a second lifting slider 62. The lifting motor 61 is fixed on the upper end of the moving slider 5, and the working end of the lifting motor 61 is connected to the lifting screw 63 through a coupling. The lifting screw 63 is hinged with the moving slider 5 , the second lifting slider 62 is connected with the lifting screw 63 through a ball screw pair, and the second lifting slider 62 is fixedly connected with the lifting platform 10 .

The rotating mechanism 20 includes a rotating motor 201, a rotating disk 204 and a rotating support 203. The rotating disk 204 is arranged in the middle of the working platform 2 of the frame 1, that is, under the pressure plate and the discharge pipe 1111 of the annular silo 1109, and rotates. The lower end of the disk 204 is connected to the rotating motor 201 through the rotating coupling 202 , and the rotating motor 201 is fixed under the working platform 2 through the rotating support 203 .

The centering mechanism 14 includes a centering plate 1403 arranged oppositely, the centering plate 1403 slidingly fits with the working platform 2, and a centering connecting plate 1406 is arranged under the working platform 2, and the centering connecting plate 1406 passes through the centering plate 1406. The centering straight plate 1405 is fixedly connected to the centering plate 1403, the upper end of the working platform 2 is provided with a centering chute, the centering straight plate 1405 is inserted into the centering chute, and the centering connecting plate 1406 is fixedly connected to the centering wire nut 1408, so The centering screw 1408 is threadedly connected to the centering screw 1402, the centering screw 1402 is hinged to the working platform 2 through the centering support 1407, the centering screw 1402 is a positive and negative screw, the centering screw 1408 and the centering screw 1402 For the mating connection of the ball screw pair, one side of the centering connecting plate 1406 is fixedly connected to the centering slider 1410 , and the centering slider 1410 is slidably connected to the centering slide rail 1411 , and the centering slide rail 1411 is fixed on the working platform 2 Below, centering bearings 1404 are hinged at both ends of the centering plate 1403 , a centering turntable 1401 is provided on one side of the centering screw 1402 , and the centering turntable 1401 is fixedly connected to the centering screw 1402 .

There is also a controller 3 on the working platform 2. The controller 3 is connected to the pressing motor 1701, the stirring motor 1101, the lifting motor 61 and the rotating motor 201 to work. The controller 3 is a PLC or a single-chip controller 3. The power supply is provided externally, and the controller 3 is connected to the power supply to control the work of the whole device. Several balls 19 are arranged on the working platform 2 to facilitate the movement of the mold 13 on the working platform 2. The scraper is connected to the working platform 2 through a scraping bracket 16, the scraping bracket 16 is L-shaped, and the scraping bracket 16 is fixed on the working platform 2 through a screw connection.

The working process of the present invention is as follows: first, the mold 13 is placed on the rotating disk 204 of the rotating mechanism 20, the centering disk 1401 is manually rotated, the centering disk 1401 drives the centering screw 1402 to work, and the centering screw 1402 is threadedly connected with two The centering thread nut 1408, the centering screw 1402 drives the two centering thread nut 1408 to make opposite movements, the centering thread nut 1408 is fixedly connected to the centering connecting plate 1406, and the centering connecting plate 1406 is fixedly connected to the centering straight plate 1405. The straight plate 1405 is fixedly connected to the centering plate 1403, so that the centering nut 1408 drives the centering plate 1403 to move to the rotating plate 204 until the centering bearing 1404 on the centering plate 1403 clamps the mold 13, and the centering plate 1403 is V The mold plate or the arc plate, the centering bearing 1404 on the centering plate 1403 plays the role of centering and clamping the mold 13 to complete the centering operation,

The controller 3 starts the lift motor 61 to work, the lift motor 61 drives the lift screw 63 through the lift coupling, the lift screw 63 drives the second lift slider 62 to rise or fall, and the second lift slider 62 drives the lift platform 10 to rise or fall, The lifting platform 10 is provided with a feeding mechanism 11 and a pressing mechanism 17. The lifting platform 10 drives the feeding mechanism 11 and the pressing mechanism 17 to ascend or descend. Descend, reinforce the lifting platform 10, prevent the rising or falling from tilting, and adjust the position of the unloading mechanism 11 and the pressing mechanism 17, so that the pressure plate and the discharge pipe 1111 of the annular silo 1109 are in the mold 13, and the discharge pipe 1111 is used in conjunction with the pressure plate uniform mold 13, and the molds 13 with different radians use different discharge pipes 1111 and pressure plates. If the blanking mechanism 11 and the pressing mechanism 17 are not concentric with the mold 13, manually rotate the moving turntable 4 and move the turntable 4. Drive the moving screw 8 to rotate, the moving screw 8 drives the moving slider 5 to slide along the moving slide rail 71, and the moving slider 5 drives the lifting platform 10 to move until the unloading mechanism 11 is concentric with the mold 13, and then manually push the lowering support plate 1705, The pressing slider 1706 under the pressing support plate 1705 slides along the lateral slide rail 101, so that the pressing support plate 1705 drives the entire pressing mechanism 17 to slide on the lateral guide rail of the lifting platform 10 until the pressing mechanism 17 is concentric with the mold 13. ;

The controller 3 starts the rotating motor 201, the stirring motor 1101, the pressing motor 1701, the first vibration motor 1108 and the second vibration motor 1110 to work at the same time. 1107 The material is stirred, and the first vibration motor 1108 vibrates the silo 1106 to prevent the material from adhering to the inner wall of the silo 1106, and at the same time accelerate the stirring of the material. The stirred material enters the annular silo 1109 under the action of gravity. Under the action of the two vibration motors 1110 and gravity, the material passes through the discharge pipe 1111 and enters the mold 13. The rotating motor 201 drives the rotating disk 204 through the rotating coupling 202, and the rotating disk 204 drives the mold 13 to rotate. The middle bearing 1404 keeps the mold 13 in the middle of the rotating disk 204 during rotation, and the center line of the mold 13 and the center line of the rotating disk 204 are always coincident. The pressing connecting plate 1704 moves up and down, and the pressing connecting plate 1704 drives the pressing sliding plate 1708 to move up and down on the sliding rail 1717 through the buffer assembly 1707, so that the pressing sliding plate 1708 drives the pressing plate to move up and down, and the pressing plate acts on the material in the mold 13. For intermittent pressing, the buffer assembly 1707 includes an upper connecting plate 1712 and a lower connecting plate 1715. The lower end of the upper connecting plate 1712 is fixedly connected to the upper connecting shaft 1713, the upper end of the lower connecting plate 1715 is fixedly connected to the lower connecting pipe 1714, and the upper connecting shaft 1713 is sleeved on the lower connection. In the tube 1714, a buffer spring 1716 is fixedly connected between the upper connecting plate 1712 and the lower connecting plate 1715. When the upper connecting plate 1712 is stressed, the buffer spring 1716 will be compressed to prevent hard downward pressure.

The above are only the preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, some changes and improvements can be made without departing from the overall concept of the present utility model. These should also be regarded as The scope of protection of the utility model.

Claims (10)

1. The utility model provides a semi-automatic material machine that paves, includes the frame, its characterized in that: the improved blanking machine is characterized in that a movable base is arranged above the machine frame, a movable slider is arranged above the movable base, the movable slider is in sliding fit with the movable base, a lifting device is arranged on one side of the movable slider, a lifting platform is fixedly connected to one side of the lifting device, a blanking mechanism is arranged on the lifting platform, a blanking supporting disc of the blanking mechanism is fixedly connected with the lifting platform, the lifting platform is far away from the one end sliding connection pressing mechanism of the lifting device, a pressing supporting column is arranged on one side, far away from the lifting platform, of the pressing mechanism, the pressing supporting column is in sliding connection with the lifting platform, a rotating mechanism is arranged at the lower end of the blanking mechanism, a mold is placed above the rotating platform of the rotating mechanism, and.

2. The semi-automatic material spreader of claim 1, wherein: the movable base is provided with a movable slide rail, the movable sliding block is connected with the movable slide rail in a sliding mode, the middle of the movable slide rail is provided with a movable screw, the movable screw is hinged to the movable slide rail, one end of the movable screw is provided with a movable turntable, the movable turntable is fixedly connected with the movable screw, the movable sliding block is connected with the movable screw through threads, and the movable screw drives the movable sliding block to move on the movable slide rail.

3. The semi-automatic material spreader of claim 1, wherein: unloading mechanism still includes agitator motor, unloading shaft coupling, cang gai, feed bin and auger, the cang gai is articulated with unloading tray, passes through unloading flange fixed connection agitator motor at unloading tray upper end middle part, and unloading tray lower extreme fixed connection feed bin, the auger is settled to the inside of feed bin, agitator motor passes through unloading shaft coupling joint auger, is equipped with vibrating motor at the outer wall of feed bin, the feed bin passes through the first vibrating motor of first vibration base fixed connection, and the exit end in the feed bin below passes through connecting plate fixed connection annular feed bin, the outer wall of annular feed bin is equipped with second vibrating motor, second vibrating motor passes through second vibration base and connects annular feed bin.

4. The semi-automatic material spreader of claim 3, wherein: the cross section of the annular bin is Y-shaped, and an outlet end below the annular bin is matched with the mold for use.

5. The semi-automatic material spreader of claim 1, wherein: the pressing mechanism further comprises a pressing motor, an eccentric wheel and a buffer assembly, a pressing support plate is arranged at the lower end of the pressing motor, the working end of the pressing motor is connected with the eccentric wheel, a pressing connecting plate is arranged at the lower end of the pressing support plate, one end of the pressing connecting plate is hinged with the eccentric wheel, the other end of the pressing connecting plate is hinged with the buffer assembly, the lower end of the buffer assembly is hinged with a pressing sliding plate, the lower end of the pressing sliding plate is hinged with a pressing block, a pressing fixing plate is arranged on one side of the pressing connecting plate, the pressing fixing plate is fixed at the lower end of the pressing support plate through a bolt, a fixing slide block is arranged on one side of the pressing fixing plate, a sliding slide rail is arranged on the pressing sliding plate, and.

6. The semi-automatic material spreader of claim 5, wherein: the buffer assembly comprises an upper connecting plate and a lower connecting plate, the lower end of the upper connecting plate is fixedly connected with an upper connecting shaft, the upper end of the lower connecting plate is fixedly connected with a lower connecting pipe, the upper connecting shaft is sleeved in the lower connecting pipe, and a buffer spring is fixedly connected between the upper connecting plate and the lower connecting plate.

7. The semi-automatic material spreader of claim 6, wherein: the upper end of the upper connecting plate is hinged with the lower pressing connecting plate, and the lower end of the lower connecting plate is hinged with the lower pressing sliding plate.

8. The semi-automatic material spreader of claim 1, wherein: the lifting device comprises a lifting motor, a lifting screw and a second lifting slider, the lifting motor is fixed to the upper end of the movable slider, the working end of the lifting motor is connected with the lifting screw through a coupler, the lifting screw is hinged to the movable slider, the second lifting slider is connected with the lifting screw through a ball screw pair in a matched mode, and the second lifting slider is fixedly connected with the lifting platform.

9. The semi-automatic material spreader of claim 1, wherein: the rotating mechanism comprises a rotating motor, a rotating disc and a rotating support, the rotating disc is arranged in the middle of the working platform of the rack, the lower end of the rotating disc is connected with the rotating motor through a rotating coupling, and the rotating motor is fixed below the working platform through the rotating support.

10. The semi-automatic material spreader of claim 1, wherein: centering mechanism is including the relative centering plate that sets up, centering plate and work platform sliding fit, the work platform below is equipped with the centering connecting plate, the centering connecting plate passes through centering straight board fixed connection centering plate, centering connecting plate fixed connection centering screw, centering screw threaded connection centering screw, the centering screw passes through centering support articulated work platform, is equipped with the centering carousel in centering screw one side, centering carousel fixed connection centering screw, centering connecting plate one side fixed connection centering slider, centering slider sliding connection centering slide rail, the centering slide rail is fixed in the work platform below, at the articulated centering bearing in centering plate both ends.

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