CN220483328U - Fortune material dolly convenient to unloading - Google Patents

Abstract

The utility model discloses a material conveying trolley convenient for blanking, and relates to the technical field of processing and conveying. The utility model comprises a vehicle body, wherein the vehicle body comprises a vehicle frame, a handle, a vehicle bottom plate and wheels, the vehicle frame is fixedly connected to the top of the vehicle bottom plate, one end of the top of the vehicle frame is fixedly connected with the handle, and four wheels are symmetrically arranged at the bottom of the vehicle bottom plate. According to the utility model, the material conveying trolley can be matched with more heights and types of blanking positions in the conveying process, so that the convenience in the blanking conveying process is improved, and meanwhile, the angle inclination of the material collecting box can be adjusted, so that better blanking operation can be achieved through the inclined angle, the manual operation is omitted, and the material conveying trolley is more convenient.

Description

Fortune material dolly convenient to unloading

Technical Field

The utility model relates to the technical field of processing and transportation, in particular to a material conveying trolley convenient for blanking.

Background

In the metal processing process, a trolley is generally used for positioning and carrying metal processing materials, and the material trolley is a tool which is convenient for loading, unloading, transporting and distributing cargoes and can be matched with equipment such as forklifts, shelves and the like for use.

The utility model discloses a transportation device for processing a metal structural part by referring to an authorized patent number CN212423233U, and has the technical effects that compared with the traditional transportation device for processing the metal structural part, the transportation device can effectively prevent a workpiece from being damaged in the transportation process and is convenient to load and unload.

In the process of implementing the patent, the applicant finds that the following technical problems exist in the patent:

1. in the process of blanking, the whole blanking table with different heights cannot be adapted because the height of the frame cannot be raised;

2. this patent is in the in-process of unloading, is inconvenient according to the angle of seting up of unloading hole in unloading department, adjusts the plate body inclination of self to can't reach the application of more convenient whole slope derivation unloading.

Disclosure of Invention

Based on the above, a material transporting trolley convenient for blanking is provided, which is used for solving the following technical problems in the background art: the top surface is inclined only through raising one side to reach the effect of ejection of compact, but in the practical application in-process, owing to there are not feeding storehouse of co-altitude and different angles, can't match different feeding storehouse mouths and carry out the cooperation and use in the use device in-process.

The utility model adopts the following technical scheme:

the material transporting trolley convenient for blanking specifically comprises: the automatic overturning and discharging device comprises a vehicle body, wherein the vehicle body comprises a vehicle frame, a handle, a vehicle bottom plate and wheels, the vehicle bottom plate is fixedly connected with the vehicle frame at the top of the vehicle bottom plate, one end of the top of the vehicle frame is fixedly connected with the handle, four wheels are symmetrically arranged at the bottom of the vehicle bottom plate, an overturning and discharging structure is arranged at the top of the vehicle body, a lifting structure is arranged at the bottom of the vehicle body, and the lifting structure and the overturning and discharging structure are fixedly connected;

the lifting structure comprises lifting components and transmission components, two groups of lifting components are installed at two ends of the top of the vehicle bottom plate, the lifting components are symmetrically arranged, the lifting components are connected through the transmission components, and the transmission components are used for two lifting components to achieve the effect of lifting simultaneously.

Further, lifting unit includes cavity pillar, lifting support, fixed cylinder and threaded rod, four cavity pillars of bottom plate top both ends fixedly connected with, two adjacent at bottom plate both ends the cavity pillar is a set of, and every group is two the inside sliding connection of cavity pillar has lifting support, bottom plate top both ends are symmetry and set up two fixed cylinders of fixedly connected with, every fixed cylinder fixed connection is in every group is two between the cavity pillar, fixed cylinder portion sliding connection has the threaded rod, the threaded rod top with lifting support bottom is the rotation and is connected.

Further, lifting assembly still includes cavity pillar, lifting support, fixed cylinder, threaded rod, first gear, stationary blade, first pivot, second gear and first bevel gear fixed cylinder top rotates and is connected with first gear, the threaded rod with first gear is inboard threaded connection, fixed cylinder outside fixedly connected with two stationary blades, two the inboard rotation of stationary blade is connected with first pivot, first pivot extends one of them fixedly connected with second gear in the top of stationary blade, the second gear with first gear is the meshing connection, first pivot extends another the bottom fixedly connected with first bevel gear of stationary blade.

Further, the transmission assembly comprises a fixed plate, a first motor, a second rotating shaft and a second bevel gear, wherein the fixed plate and the first motor are fixedly connected to two ends of the top of the vehicle bottom plate respectively, the second rotating shaft is fixedly connected to the output end of the first motor, one end, far away from the first motor, of the second rotating shaft is rotationally connected with the fixed plate, two second bevel gears are fixedly connected to two ends of the outer side of the second rotating shaft, and each second bevel gear is in meshed connection with each first bevel gear.

Further, upset unloading structure includes roof, recess board, double-deck slip limiting plate, second motor, fifth gear, slip rack board, slide bar, spacing riser, collection box, stopper and slip foot, lifting support top fixedly connected with roof, roof top both ends fixedly connected with two recess boards, and two the recess board is the symmetry setting, the recess is seted up at recess board top, just recess board recess both sides are semicircle arc setting, roof top both ends are the symmetry and set up two double-deck slip limiting plates of fixedly connected with, two the recess board is connected two the inboard of double-deck slip limiting plate, one of them double-deck slip limiting plate is kept away from the one end of recess board and is installed the second motor, second motor output fixedly connected with fifth gear installs the bottom sliding connection of double-deck slip limiting plate has the slide rack board, the sliding rack board with the fifth gear is the meshing and is connected, installs the double-deck slip limiting plate top sliding connection of second motor has one slide bar and two double-deck sliding connection limiting plate have two equal sliding connection two vertical bar one end two the side of double-deck sliding limiting plate has two to keep away from the one end of double-deck sliding limiting plate.

Further, two inside sliding connection of spacing riser has the stopper, two the equal fixedly connected with box that gathers materials of stopper bottom, the equal fixedly connected with in box both ends that gathers materials two slip foot, two slip foot fixed connection is in the both sides at box each end that gathers materials, gather materials two at box both ends the distance between the slip foot is less than the recess of seting up at recess board top, and with the recess board is sliding fit.

Compared with the prior art, the utility model has the following beneficial effects:

according to the material conveying trolley convenient for blanking, provided by the utility model, the material conveying trolley can be matched with more heights and types of blanking positions in the conveying process, so that the convenience in the blanking and conveying process is improved.

According to the material conveying trolley convenient for blanking, the angle inclination of the material collecting box can be adjusted, so that better blanking operation can be achieved through the inclined angle, manual operation is omitted, and the material conveying trolley is more convenient and rapid.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a material transporting trolley convenient for blanking;

FIG. 2 is a schematic structural view of a frame of a transporting trolley for facilitating blanking;

FIG. 3 is a schematic structural view of a lifting assembly of a transporting trolley for facilitating blanking;

fig. 4 is a schematic structural view of a turning and blanking structure of a conveying trolley for facilitating blanking;

FIG. 5 is a schematic structural view of a double-layer sliding limiting plate of a conveying trolley for facilitating blanking;

fig. 6 is a working schematic diagram of a turnover blanking structure of a conveying trolley for blanking.

In the drawings, the list of components represented by the various numbers is as follows:

1. a vehicle body; 2. a lifting structure; 3. turning over a blanking structure; 4. a frame; 5. a handlebar; 6. a vehicle bottom plate; 7. a wheel; 8. a hollow pillar; 9. a lifting bracket; 10. a fixed cylinder; 11. a threaded rod; 12. a first gear; 13. a fixing piece; 14. a first rotating shaft; 15. a second gear; 16. a first bevel gear; 17. a fixing plate; 18. a first motor; 19. a second rotating shaft; 20. a second bevel gear; 21. a top plate; 22. a groove plate; 23. a double-layer sliding limiting plate; 24. a second motor; 25. a fifth gear; 26. sliding rack plate; 27. a sliding bar; 28. a limiting vertical plate; 29. a collection box; 30. a limiting block; 31. and a sliding foot.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As in the background art, the whole device cannot adapt to the blanking tables with different heights because the height of the frame cannot be raised in the blanking process of the patent; meanwhile, in the process of blanking, the plate inclination angle of the blanking device is inconvenient to adjust according to the set angle of the blanking hole at the blanking position, so that the application of the blanking device cannot be conveniently and integrally led out in an inclined mode.

In order to solve the technical problem, the utility model provides the material conveying trolley which is convenient for discharging, and the material conveying trolley can be matched with more discharging positions with more heights and types in the conveying process, so that the convenience in the discharging and conveying process is improved.

Specifically, referring to fig. 1 to 4, a transporting trolley for facilitating discharging specifically includes:

the automatic overturning and blanking device comprises a vehicle body 1, wherein the vehicle body 1 comprises a vehicle frame 4, a vehicle handle 5, a vehicle bottom plate 6 and wheels 7, the top of the vehicle bottom plate 6 is fixedly connected with the vehicle frame 4, one end of the top of the vehicle bottom plate 6 is fixedly connected with the vehicle handle 5, four wheels 7 are symmetrically arranged at the bottom of the vehicle bottom plate 6, an overturning and blanking structure 3 is arranged at the top of the vehicle body 1, a lifting structure 2 is arranged at the bottom of the vehicle body 1, and the lifting structure 2 is fixedly connected with the overturning and blanking structure 3;

the lifting structure 2 comprises lifting components and transmission components, two groups of lifting components are installed at two ends of the top of the vehicle bottom plate 6 and are symmetrically arranged, the two groups of lifting components are connected through the transmission components, and the transmission components are used for achieving the effect of lifting simultaneously.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Example 1:

referring to fig. 1, a transporting trolley for facilitating blanking includes:

the automatic overturning and blanking device comprises a vehicle body 1, wherein the vehicle body 1 comprises a vehicle frame 4, a vehicle handle 5, a vehicle bottom plate 6 and wheels 7, the top of the vehicle bottom plate 6 is fixedly connected with the vehicle frame 4, one end of the top of the vehicle bottom plate 6 is fixedly connected with the vehicle handle 5, four wheels 7 are symmetrically arranged at the bottom of the vehicle bottom plate 6, an overturning and blanking structure 3 is arranged at the top of the vehicle body 1, a lifting structure 2 is arranged at the bottom of the vehicle body 1, and the lifting structure 2 is fixedly connected with the overturning and blanking structure 3;

the lifting structure 2 comprises lifting components and transmission components, two groups of lifting components are installed at two ends of the top of the vehicle bottom plate 6 and are symmetrically arranged, the two groups of lifting components are connected through the transmission components, and the transmission components are used for achieving the effect of lifting simultaneously.

The moving mode of the vehicle body 1 in the present case is the prior art, and will not be further described herein.

Example 2:

the embodiment 2 is used for further disclosing a specific structure of the lifting structure 2 on the premise of the embodiment, and through the structural cooperation of the lifting structure 2 and the embodiment, more heights and types of blanking positions can be matched with the material conveying trolley in the conveying process, so that convenience in the blanking and conveying process is improved.

The material transporting trolley convenient for blanking provided in embodiment 1 is further optimized, specifically, as shown in fig. 1-4, the lifting assembly comprises a hollow supporting column 8, a lifting support 9, a fixed cylinder 10 and a threaded rod 11, four hollow supporting columns 8 are fixedly connected to two ends of the top of the trolley bottom plate 6, two adjacent hollow supporting columns 8 at two ends of the trolley bottom plate 6 are in a group, the lifting support 9 is slidably connected to the inside of each group of two hollow supporting columns 8, two fixed cylinders 10 are symmetrically arranged at two ends of the top of the trolley bottom plate 6 and fixedly connected between each group of two hollow supporting columns 8, the threaded rod 11 is slidably connected to the parts of the fixed cylinders 10, and the top of the threaded rod 11 is rotatably connected with the bottom of the lifting support 9.

The lifting assembly further comprises a hollow support column 8, a lifting support 9, a fixed cylinder 10, a threaded rod 11, a first gear 12, fixing plates 13, a first rotating shaft 14, a second gear 15 and a first bevel gear 16, wherein the first gear 12 is rotatably connected to the top of the fixed cylinder 10, the threaded rod 11 is in threaded connection with the inner side of the first gear 12, two fixing plates 13 are fixedly connected to the outer side of the fixed cylinder 10, the first rotating shaft 14 is rotatably connected to the inner side of the two fixing plates 13, the first rotating shaft 14 extends out of the top of one fixing plate 13 and is fixedly connected with the second gear 15, the second gear 15 is in meshed connection with the first gear 12, the first gear 12 can be driven to rotate through rotation of the second gear 15, so that the threaded rod 11 in threaded connection with the inner side of the first gear 12 ascends and descends in the fixed cylinder 10, and the first rotating shaft 14 extends out of the bottom of the other fixing plate 13 and is fixedly connected with the first bevel gear 16.

The transmission assembly comprises a fixed plate 17, a first motor 18, a second rotating shaft 19 and a second bevel gear 20, wherein the fixed plate 17 and the first motor 18 are fixedly connected to the two ends of the top of the vehicle bottom plate 6 respectively, the second rotating shaft 19 is fixedly connected to the output end of the first motor 18, one end, far away from the first motor 18, of the second rotating shaft 19 is rotationally connected with the fixed plate 17, two second bevel gears 20 are fixedly connected to the two ends of the outer side of the second rotating shaft 19, each second bevel gear 20 is in meshed connection with each first bevel gear 16, the second rotating shaft 19 can be rotated through the opening of the first motor 18, so that the two second bevel gears 20 on the outer side of the second rotating shaft 19 are driven to rotate, the two first bevel gears 16 which are meshed with the two second bevel gears 20 are driven to rotate simultaneously, the two first bevel gears 16 drive the second gears 15 on the two ends to rotate, the two threaded rods 11 are enabled to ascend and descend simultaneously, and the effect that the two lifting brackets 9 are lifted synchronously is achieved.

Example 3:

this embodiment 3 is used for further disclosing the concrete structure of upset unloading structure 3 under the prerequisite of above-mentioned embodiment, through the cooperation of structure in upset unloading structure 3 and the above-mentioned embodiment to can adjust through the angle slope to the box 29 that gathers materials, thereby reach better unloading operation through the angle of slope, save manual operation, it is more convenient.

The material transporting trolley convenient for blanking provided in the embodiment 1 and the embodiment 2 is further optimized, specifically, as shown in fig. 5-6, the overturning blanking structure 3 comprises a top plate 21, a groove plate 22, a double-layer sliding limiting plate 23, a second motor 24, a fifth gear 25, a sliding rack plate 26, a sliding strip 27, a limiting vertical plate 28, a collecting box 29, a limiting block 30 and a sliding foot 31, the top of the lifting bracket 9 is fixedly connected with the top plate 21, two groove plates 22 are fixedly connected with two ends of the top plate 21, the two groove plates 22 are symmetrically arranged, grooves are formed in the top of the groove plates 22, two semicircular arc-shaped grooves are formed on two sides of the groove plate 22, two double-layer sliding limiting plates 23 are symmetrically arranged at two ends of the top plate 21, the two groove plates 22 are connected to the inner sides of the two double-layer sliding limiting plates 23, one end of one double-layer sliding limiting plate 23 far away from the groove plate 22 is provided with a second motor 24, the output end of the second motor 24 is fixedly connected with a fifth gear 25, the bottom of the double-layer sliding limiting plate 23 provided with the second motor 24 is slidably connected with a sliding rack plate 26, the sliding rack plate 26 is in meshed connection with the fifth gear 25, the fifth gear 25 can drive the sliding rack plate 26 to transversely move on the inner side of the double-layer sliding limiting plate 23 by starting the second motor 24, the top of the double-layer sliding limiting plate 23 provided with the second motor 24 is slidably connected with a sliding strip 27, the sliding strip 27 and one end of the sliding rack plate 26 far away from the second motor 24 are fixedly connected with limiting vertical plates 28, when the sliding rack plate 26 moves, the limiting vertical plates 28 can be driven to simultaneously move, the inner sides of the other double-layer sliding limiting plate 23 are slidably connected with two sliding strips 27, one end of the two sliding strips 27 far away from the double-layer sliding limiting plate 23 is fixedly connected with another limiting vertical plate 28.

The inside sliding connection of two spacing risers 28 has stopper 30, can make and drive stopper 30 and remove simultaneously when spacing riser 28 removes, the equal fixedly connected with of two stopper 30 bottoms gathers materials box 29, can make stopper 30 drive the box 29 that gathers materials when spacing riser 28 inboard removes, the box 29 that gathers materials both ends all fixedly connected with two sliding feet 31, two sliding feet 31 fixed connection are in the both sides at box 29 each end that gathers materials, the distance between two sliding feet 31 at box 29 both ends that gathers materials is less than the recess of seting up at recess 22 top, and with recess 22 for sliding fit, can make box 29 that gathers materials in recess 22 inboard lateral movement, when the semicircle inside of recess 22 recess is moved to one of them sliding feet 31, the recess of recess 22 can carry out spacing effect to sliding feet 31, the sliding feet 31 of opposite side can be lifted up under the drive of stopper 30 this moment, break away from recess 22 recess, and then reach the upset unloading effect of box 29 that gathers materials.

The use process of the material conveying trolley convenient for blanking provided by the utility model is as follows:

after the material is put into the top of the material collecting box 29, the material vehicle is moved to a designated position, at this time, the first motor 18 is started, the first motor 18 drives the second rotating shaft 19 to rotate anticlockwise or clockwise, the two second bevel gears 20 on the outer side of the second rotating shaft 19 are driven to rotate, and then the two first bevel gears 16 are driven to rotate, the two first bevel gears 16 drive the second gears 15 on the top of the first rotating shaft 14 to rotate, the first gears 12 can be driven to rotate through the rotation of the second gears 15, at the moment, the threaded rod 11 in threaded connection with the inner side of the first gears 12 can be driven to obtain the same torque through the torque of the first gears 12, so that lifting adjustment of the threaded rod 11 is completed through threaded connection with the first gears 12 in the rotating process, the effect that the threaded rod 11 drives the lifting support 9 to ascend and descend in the hollow support 8 is achieved, the top plate 21 on the top of the lifting support 9 is lifted to a height corresponding to a blanking hole at the blanking position, and blanking is convenient to perform.

Through opening second motor 24, can make second motor 24 output drive fifth gear 25 rotate, and then drive the slip rack board 26 at the inboard lateral shifting of double-deck slip limiting plate 23, and then make with slip rack board 26 and slip bar 27 fixed connection's spacing riser 28 lateral shifting, simultaneously make the stopper 30 lateral shifting that drives spacing riser 28 inside, and then drive the box 29 that gathers materials with stopper 30 fixed connection in recess 22 top lateral shifting, make the slip foot 31 at box 29 both ends slide in recess 22 top recess, when one of them slip foot 31 of box 29 both ends slides to recess 22 recess edges, the slip foot 31 of box 29 both ends opposite side can break away from the spacing of recess 22 recess opposite side, stopper 30 can be because of the spacing of box 29 is in spacing riser 28 lateral shifting in-process at spacing riser 28 inside downwardly sliding, when stopper 30 is in spacing riser 28 downwardly sliding, stopper 30 can drive box 29 with the slip foot 31 that the recess edge spacing of recess 22 is the centre of a circle, and then reach the effect of turning over the book and turning over the unloading.

Claims (6)

1. The utility model provides a fortune material dolly convenient to unloading, includes automobile body (1), automobile body (1) include frame (4), handlebar (5), bottom plate (6) and wheel (7), bottom plate (6) top fixedly connected with frame (4), frame (4) top one end fixedly connected with handlebar (5), bottom plate (6) bottom is the symmetry and is provided with four wheels (7), a serial communication port, upset unloading structure (3) are installed at automobile body (1) top, elevation structure (2) are installed to automobile body (1) bottom, elevation structure (2) with be fixed connection setting between upset unloading structure (3);

the lifting structure (2) comprises lifting components and transmission components, two groups of lifting components are installed at two ends of the top of the vehicle bottom plate (6), the lifting components are symmetrically arranged, the lifting components are connected through the transmission components, and the transmission components are used for two lifting components to achieve the effect of lifting simultaneously.

2. The material transporting trolley convenient to unloading according to claim 1, wherein, lifting unit includes cavity pillar (8), lifting support (9), fixed cylinder (10) and threaded rod (11), four cavity pillar (8) of car bottom plate (6) top both ends fixedly connected with, two adjacent cavity pillar (8) in car bottom plate (6) both ends are a set of, every two cavity pillar (8) inside sliding connection has lifting support (9), car bottom plate (6) top both ends are symmetry setting fixed cylinder (10) of fixedly connected with, every fixed cylinder (10) fixed connection is between every two cavity pillar (8) of group, fixed cylinder (10) portion sliding connection has threaded rod (11), threaded rod (11) top with lifting support (9) bottom is the rotation and is connected.

3. The material transporting trolley convenient to unloading according to claim 2, wherein the lifting assembly further comprises a hollow supporting column (8), a lifting support (9), a fixed cylinder (10), a threaded rod (11), a first gear (12), a fixed sheet (13), a first rotating shaft (14), a second gear (15) and a first bevel gear (16), wherein the first gear (12) is rotationally connected to the top of the fixed cylinder (10), the threaded rod (11) is in threaded connection with the inner side of the first gear (12), two fixed sheets (13) are fixedly connected to the outer side of the fixed cylinder (10), a first rotating shaft (14) is rotationally connected to the inner side of one fixed sheet (13), the first rotating shaft (14) extends out of the top of one fixed sheet (13) and is fixedly connected with the second gear (15), the second gear (15) is in meshed connection with the first gear (12), and the first bevel gear (16) is fixedly connected to the bottom of the other fixed sheet (13) extending out of the first rotating shaft (14).

4. A transporting trolley convenient for blanking according to claim 3, characterized in that, the transmission assembly includes fixed plate (17), first motor (18), second pivot (19) and second bevel gear (20), fixed plate (17) and first motor (18) are fixedly connected with respectively at bottom plate (6) top both ends, first motor (18) output fixedly connected with second pivot (19), the one end that first motor (18) was kept away from to second pivot (19) with fixed plate (17) is the swivelling joint, two second bevel gears (20) are fixedly connected with in second pivot (19) outside both ends, every second bevel gear (20) is the meshing connection with every first bevel gear (16).

5. The material transporting trolley convenient for blanking according to claim 3, wherein the overturning blanking structure (3) comprises a top plate (21), a groove plate (22), a double-layer sliding limiting plate (23), a second motor (24), a fifth gear (25), sliding rack plates (26), sliding strips (27), limiting risers (28), a collecting box (29), limiting blocks (30) and sliding feet (31), the top of the lifting support (9) is fixedly connected with the top plate (21), two groove plates (22) are fixedly connected to the two ends of the top plate (21), the two groove plates (22) are symmetrically arranged, grooves are formed in the top of the groove plate (22), semicircular arc-shaped grooves are formed in the two sides of the groove plate (22), two double-layer sliding limiting plates (23) are symmetrically arranged at the two ends of the top plate (21), the two groove plates (22) are connected to the inner sides of the two double-layer sliding limiting plates (23), one double-layer sliding limiting plate (23) is far away from the groove plate (22), the second motor (24) is fixedly connected with the second motor (24), the second end of the groove plate (24) is fixedly connected with the second rack plate (24), the sliding rack plate (26) is in meshed connection with the fifth gear (25), a sliding strip (27) is arranged at the top of the double-layer sliding limiting plate (23) of the second motor (24) in a sliding connection mode, one end, far away from the second motor (24), of the sliding strip (27) is fixedly connected with a limiting vertical plate (28), the other end, far away from the double-layer sliding limiting plate (23), of the sliding strip (27) is fixedly connected with two sliding strips (27), and one end, far away from the double-layer sliding limiting plate (23), of the sliding strip (27) is fixedly connected with another limiting vertical plate (28).

6. The material transporting trolley convenient to blanking according to claim 5, wherein two limiting risers (28) are internally connected with limiting blocks (30) in a sliding mode, two limiting blocks (30) are fixedly connected with a material collecting box (29) at the bottom, two sliding feet (31) are fixedly connected to two ends of the material collecting box (29), the two sliding feet (31) are fixedly connected to two sides of each end of the material collecting box (29), and the distance between the two sliding feet (31) at two ends of the material collecting box (29) is smaller than a groove formed in the top of a groove plate (22) and is in sliding fit with the groove plate (22).