CN220537436U - Household lifting platform - Google Patents

Abstract

The utility model provides a household lifting platform, which belongs to the technical field of lifting platforms and aims to solve the problem that a user falls down due to shaking caused by poor stability when the lifting platform is used; comprises a base; the bottom of the base is fixedly provided with a moving mechanism, and the top of the base is fixedly provided with a storage device; the outer side of the storage device is provided with a protection mechanism in a sliding manner, and the top of the storage device is fixedly provided with an auxiliary device; by arranging the synchronous wheel B and the synchronous belt device, the effect that the two groups of double-headed screws B respectively drive the two groups of guide seats to move in opposite directions at the same time is realized; when the base needs to be moved, the universal wheels are dropped to move the base; the purpose that the universal wheel is lifted and the base is fixed by using four groups of supporting feet when the base needs to be fixed is achieved; is favorable for preventing the shaking of the lifting platform and causing the falling phenomenon of a user.

Description

Household lifting platform

Technical Field

The utility model belongs to the technical field of lifting platforms, and particularly relates to a household lifting platform.

Background

The lifting platform is a lifting machine for vertically conveying people or objects and is widely applied to high-altitude installation, maintenance and other operations; in the family life, the utility model can be used for cleaning the roof, replacing the bulb, pasting pictures and other high-altitude operations.

The existing household lifting platform generally utilizes a braking structure of the universal wheel to brake the wheel body of the universal wheel after moving through the universal wheel, and the universal wheel only brakes the vertical rotation of the wheel body after braking and does not brake the horizontal rotation of the universal wheel; therefore, the stability is poor when the lifting platform is used, and shaking possibly occurs, so that a user falls off; thereby reducing the practicality of the lifting platform.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a household lifting platform, which solves the problems that the lifting platform provided in the background art is poor in stability and can shake to cause a falling phenomenon of a user when in use.

The utility model discloses a household lifting platform, which is characterized by comprising the following specific technical means:

a household lifting platform, comprising a base; four groups of supporting feet are fixedly arranged at the bottom of the base, and two groups of double-headed screws A are rotatably arranged in the base; the double-headed screw A is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged in the base; synchronous wheels A are fixedly arranged on the outer sides of the two groups of double-headed screws A, the number of the synchronous wheels A is two, and a synchronous belt device is arranged between the two groups of synchronous wheels A in a matched mode; the outer sides of the two groups of double-headed screws A are provided with threaded cylinders in threaded connection, the number of the threaded cylinders is four, and the two groups of threaded cylinders are symmetrically arranged; the outer side of the thread cylinder is fixedly provided with a sliding seat A, and the sliding seat A is positioned between the two groups of thread cylinders; the top of the sliding seat A is rotatably provided with a lifting rod A, and the outer side of the top of the lifting rod A is rotatably provided with a connecting seat A; the bottom of the base is fixedly provided with a moving mechanism, and the top of the base is fixedly provided with a storage device; the outside of the storage device is slidably provided with a protection mechanism, and the top of the storage device is fixedly provided with an auxiliary device.

Further, the moving mechanism includes: the device comprises a fixing frame, a double-head screw B, a synchronous wheel B and a guide rod; the fixing frame is fixedly arranged at the bottom of the base; the double-headed screw B is rotationally arranged in the fixing frame, and the number of the double-headed screw B and the number of the fixing frame are two; the double-headed screw B is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged at the outer side of the fixing frame; the number of the synchronous wheels B is two, the two synchronous wheels B are respectively and fixedly arranged at the outer sides of the double-headed screw rods B, and a synchronous belt device is arranged between the two synchronous wheels B in a matched manner; the guide rod is fixedly arranged in the fixing frame.

Further, the moving mechanism further includes: the device comprises a guide seat, a rotating plate, a bottom plate and universal wheels; the guide seat is arranged on the outer side of the guide rod in a sliding manner, and is arranged on the outer side of the double-head screw B in a threaded connection manner; the rotating plates are arranged at the bottom of the guide seat in a rotating way, the number of the rotating plates and the number of the guide seat are four, and the rotating plates and the guide seat are symmetrically arranged; the bottom plate is rotatably arranged at the bottom of the rotating plate, and is positioned between the two groups of rotating plates; the universal wheel is fixedly arranged at the bottom of the bottom plate.

Further, the storage device includes: the storage rack, the drawer, the handle, the cross rod, the sliding seat B, the lifting rod B and the connecting seat B; the storage rack is fixedly arranged at the top of the connecting seat A; the drawer is arranged in the storage rack in a sliding way; the handle is fixedly arranged at the outer side of the drawer; the cross bars are fixedly arranged at the bottom of the storage rack, and the number of the cross bars is two; the sliding seats B are arranged between the two groups of cross bars in a sliding way, the number of the sliding seats B is two, and the two groups of sliding seats B are symmetrically arranged; the lifting rod B is rotatably arranged at the bottom of the sliding seat B, and the lifting rod B is rotatably connected with the lifting rod A; the connecting seat B is rotationally arranged at the bottom of the lifting rod B, and is fixedly arranged inside the base.

Further, the protection mechanism includes: the device comprises a protective frame, a baffle A, a square hole A, a vertical rod and a square hole B; the protection frame is arranged on the outer side of the storage frame in a sliding way; the baffle A is fixedly arranged at the outer side of the bottom of the protection frame, and the baffle A is slidably arranged at the inner side of the storage frame; the square hole A is formed in the top side of the protection frame and completely penetrates through the protection frame; the vertical rod is fixedly arranged at the bottom of the protection frame, and the vertical rod is arranged in the storage frame in a sliding manner; the square hole B is arranged inside the bottom side of the vertical rod, the square hole B completely penetrates through the vertical rod, and the square hole B and the square hole A are positioned on the same axis.

Further, the auxiliary device includes: the auxiliary table, the auxiliary block and the baffle B; the auxiliary table is fixedly arranged at the top of the storage rack; the auxiliary block is arranged in the auxiliary table in a sliding manner, the bottom of the auxiliary block is of a bevel edge structure, and the auxiliary block is arranged in the inner sides of the square holes A and B in a sliding manner; baffle B is fixed to be set up in the auxiliary block outside, and baffle B slides and set up in auxiliary bench inside to be provided with the spring piece between baffle B outside and the auxiliary bench inside.

Further, the auxiliary device further includes: an auxiliary shaft, an auxiliary gear and a rack; the auxiliary shaft is rotatably arranged in the auxiliary table, and a hexagonal hole is formed in the top of the auxiliary shaft; the auxiliary gears are fixedly arranged on the outer side of the auxiliary shaft, and the number of the auxiliary gears is two; the rack is arranged in the auxiliary table in a sliding manner, and is fixedly arranged on the outer side of the baffle B; the number of racks is four, two groups of racks are meshed with one group of auxiliary gears, and the two groups of racks are arranged in a central symmetry mode.

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

1. according to the utility model, the synchronous wheel B and the synchronous belt device are arranged, so that the effect that two groups of double-headed screws B respectively drive two groups of guide seats to move in opposite directions at the same time is realized; the purpose that the four groups of rotating plates drive the two groups of bottom plates to move up and down is achieved; the universal wheels are dropped to enable the base to move when the base needs to be moved; the purpose that the universal wheel is lifted and the base is fixed by using four groups of supporting feet when the base needs to be fixed is achieved; therefore, compared with the existing lifting platform, the lifting platform can ensure the stability of the lifting platform in use on the premise of ensuring convenient movement; is favorable for preventing the shaking of the lifting platform and causing the falling phenomenon of a user.

2. According to the utility model, the storage rack and the drawer are arranged, so that the effect of conveniently storing sundries in a household is realized; plays a role in enhancing the functionality of the lifting platform; the auxiliary block and the square hole B are utilized, so that the effect of easily and conveniently lifting and fixing the protective frame is achieved; the protection rack is utilized to protect the user; is beneficial to enhancing the safety of a user during use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic view of the structure of the lower surface of the base of the present utility model.

Fig. 3 is a schematic structural view of the moving mechanism of the present utility model.

Fig. 4 is a schematic view of the structure of the lower surface of the fixing frame of the present utility model.

Fig. 5 is a schematic view of the internal structure of the base of the present utility model.

Fig. 6 is a schematic structural view of the storage rack of the present utility model.

Fig. 7 is a schematic view of the structure of the lower surface of the storage rack of the present utility model.

Fig. 8 is a schematic structural view of the protection mechanism of the present utility model.

Fig. 9 is a schematic structural view of the storage rack and the drawer according to the present utility model.

Fig. 10 is a schematic cross-sectional structure of the auxiliary table of the present utility model.

In the figure, the correspondence between the component names and the drawing numbers is:

1. a base; 101. supporting feet; 102. a double-end screw A; 103. a synchronizing wheel A; 104. a thread cylinder; 105. a sliding seat A; 106. a lifting rod A; 107. a connecting seat A;

2. a moving mechanism; 201. a fixing frame; 202. a double-end screw B; 203. a synchronizing wheel B; 204. a guide rod; 205. a guide seat; 206. a rotating plate; 207. a bottom plate; 208. a universal wheel;

3. a storage device; 301. a storage rack; 302. a drawer; 303. a handle; 304. a cross bar; 305. a sliding seat B; 306. a lifting rod B; 307. a connecting seat B;

4. a protective mechanism; 401. a protective frame; 402. a baffle A; 403. square hole A; 404. a vertical rod; 405. square holes B;

5. an auxiliary device; 501. an auxiliary table; 502. an auxiliary block; 503. a baffle B; 504. an auxiliary shaft; 505. an auxiliary gear; 506. a rack.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples.

Embodiment one:

as shown in fig. 1 to 10:

the utility model provides a household lifting platform, which comprises a base 1; four groups of supporting feet 101 are fixedly arranged at the bottom of the base 1, and two groups of double-headed screws A102 are rotatably arranged in the base 1; the double-headed screw A102 is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged in the base 1; the outer sides of the two groups of double-headed screws A102 are fixedly provided with synchronous wheels A103, the number of the synchronous wheels A103 is two, and a synchronous belt device is arranged between the two groups of synchronous wheels A103 in a matched manner; the outer sides of the two groups of double-headed screws A102 are provided with screw barrels 104 in a threaded connection mode, the number of the screw barrels 104 is four, and the two groups of screw barrels 104 are symmetrically arranged; a sliding seat A105 is fixedly arranged on the outer side of the threaded cylinder 104, and the sliding seat A105 is positioned between two groups of threaded cylinders 104; the top of the sliding seat A105 is rotatably provided with a lifting rod A106, and the outer side of the top of the lifting rod A106 is rotatably provided with a connecting seat A107; the bottom of the base 1 is fixedly provided with a moving mechanism 2, and the top of the base 1 is fixedly provided with a storage device 3; the storage device 3 includes: a storage rack 301, a drawer 302, a handle 303, a cross bar 304, a sliding seat B305, a lifting rod B306 and a connecting seat B307; the storage rack 301 is fixedly arranged at the top of the connecting seat A107; the drawer 302 is slidably arranged inside the storage rack 301; the handle 303 is fixedly arranged outside the drawer 302; the cross bars 304 are fixedly arranged at the bottom of the storage rack 301, and the number of the cross bars 304 is two; the sliding seats B305 are arranged between the two groups of cross bars 304 in a sliding manner, the number of the sliding seats B305 is two, and the two groups of sliding seats B305 are symmetrically arranged; the lifting rod B306 is rotatably arranged at the bottom of the sliding seat B305, and the lifting rod B306 is rotatably connected with the lifting rod A106; the connecting seat B307 is rotatably arranged at the bottom of the lifting rod B306, and the connecting seat B307 is fixedly arranged in the base 1; the outer side of the storage device 3 is provided with a protection mechanism 4 in a sliding manner, and the top of the storage device 3 is fixedly provided with an auxiliary device 5; the concrete functions are as follows: by arranging the storage rack 301 and the drawer 302, the effect of conveniently storing sundries in a household is realized; plays a role in enhancing the functionality of the lifting platform.

Embodiment two:

as shown in fig. 2 to 4:

on the basis of the first embodiment, the moving mechanism 2 includes: the device comprises a fixing frame 201, a double-head screw B202, a synchronous wheel B203, a guide rod 204, a guide seat 205, a rotating plate 206, a bottom plate 207 and a universal wheel 208; the fixing frame 201 is fixedly arranged at the bottom of the base 1; the double-headed screw B202 is rotatably arranged in the fixed frame 201, and the number of the double-headed screw B202 and the fixed frame 201 are two groups; the double-headed screw B202 is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged at the outer side of the fixing frame 201; the number of the synchronizing wheels B203 is two, the two synchronizing wheels B203 are fixedly arranged outside the double-headed screw B202 respectively, and a synchronous belt device is arranged between the two synchronizing wheels B203 in a matched manner; the guide rod 204 is fixedly arranged inside the fixed frame 201; the guide seat 205 is slidably arranged outside the guide rod 204, and the guide seat 205 is arranged outside the double-end screw B202 through threaded connection; the rotating plates 206 are rotatably arranged at the bottom of the guide seats 205, the number of the rotating plates 206 and the number of the guide seats 205 are four, and the rotating plates 206 and the guide seats 205 are symmetrically arranged; the bottom plate 207 is rotatably arranged at the bottom of the rotating plate 206, and the bottom plate 207 is positioned between the two groups of rotating plates 206; the universal wheel 208 is fixedly arranged at the bottom of the bottom plate 207; the concrete functions are as follows: by arranging the synchronous wheel B203 and the synchronous belt device, the effect that the two groups of double-headed screws B202 respectively drive the two groups of guide seats 205 to move in opposite directions at the same time is realized; the purpose that the four groups of rotating plates 206 drive the two groups of bottom plates 207 to move up and down is achieved; the universal wheel 208 is dropped to move the base 1 when the base 1 needs to be moved; the purpose that when the base 1 needs to be fixed, the universal wheels 208 are lifted and the base 1 is fixed by using four groups of supporting feet 101 is achieved; therefore, compared with the existing lifting platform, the lifting platform can ensure the stability of the lifting platform in use on the premise of ensuring convenient movement; is favorable for preventing the shaking of the lifting platform and causing the falling phenomenon of a user.

Embodiment III:

as shown in fig. 6 to 10:

on the basis of the first and second embodiments, the protection mechanism 4 includes: the device comprises a protective frame 401, a baffle A402, a square hole A403, a vertical rod 404 and a square hole B405; the protective frame 401 is slidably arranged outside the storage frame 301; the baffle A402 is fixedly arranged at the outer side of the bottom of the protective frame 401, and the baffle A402 is slidably arranged at the inner side of the storage frame 301; the square hole A403 is formed in the top side of the protection frame 401, and the square hole A403 completely penetrates through the protection frame 401; the vertical rod 404 is fixedly arranged at the bottom of the protective frame 401, and the vertical rod 404 is slidably arranged inside the storage frame 301; the square hole B405 is formed in the bottom side of the vertical rod 404, the square hole B405 completely penetrates through the vertical rod 404, and the square hole B405 and the square hole A403 are positioned on the same axis; the auxiliary device 5 includes: auxiliary table 501, auxiliary block 502, baffle B503, auxiliary shaft 504, auxiliary gear 505 and rack 506; the auxiliary table 501 is fixedly arranged on the top of the storage rack 301; the auxiliary block 502 is slidably disposed inside the auxiliary table 501, the bottom of the auxiliary block 502 is in a bevel structure, and the auxiliary block 502 is slidably disposed inside the square holes a403 and B405; the baffle B503 is fixedly arranged on the outer side of the auxiliary block 502, the baffle B503 is slidably arranged in the auxiliary table 501, and a spring piece is arranged between the outer side of the baffle B503 and the inner side of the auxiliary table 501; the auxiliary shaft 504 is rotatably arranged in the auxiliary table 501, and a hexagonal hole is formed in the top of the auxiliary shaft 504; the auxiliary gears 505 are fixedly arranged outside the auxiliary shaft 504, and the number of the auxiliary gears 505 is two; the rack 506 is slidably disposed inside the auxiliary table 501, and the rack 506 is fixedly disposed outside the baffle B503; the number of the racks 506 is four, two groups of racks 506 are meshed with one group of auxiliary gears 505, and the two groups of racks 506 are arranged in a central symmetry manner; the concrete functions are as follows: the auxiliary block 502 and the square hole B405 are utilized to achieve the effect of easily and conveniently lifting and fixing the protective frame 401; plays a role in protecting a user by using the protection frame 401; is beneficial to enhancing the safety of a user during use.

Specific use and action of the embodiment:

in the present utility model, when the base 1 needs to be moved to the use position; the motor device is used for enabling one group of double-headed screws B202 to rotate, and the double-headed screws B202 drive the other group of double-headed screws B202 to rotate through the synchronous wheel B203 and the synchronous belt device, so that the two groups of double-headed screws B202 respectively drive the two groups of guide seats 205 to reversely slide; thereby, the two groups of rotating plates 206 rotate in opposite directions at the same time, the two groups of bottom plates 207 move downwards at the same time, and the universal wheels 208 are contacted with the ground to jack up the base 1; when the base 1 moves to a specified position, the universal wheel 208 is lifted, so that the base 1 is supported and fixed by the four groups of supporting feet 101; therefore, compared with the existing lifting platform, the lifting platform can ensure the stability of the lifting platform in use on the premise of ensuring convenient movement; the phenomenon that a user falls down due to shaking of the lifting platform is prevented; sundries in a household can be stored by utilizing the storage rack 301 and the drawer 302; plays a role in enhancing the functionality of the lifting platform; the motor device is started to drive a group of double-headed screws A102 to rotate, and the two groups of double-headed screws A102 simultaneously rotate through the synchronous wheel A103 and the synchronous belt device, so that the two groups of sliding seats A105 simultaneously slide in opposite directions; the two groups of sliding seats A105 drive the lifting rod A106 and the lifting rod B306 to reversely rotate, so that the auxiliary table 501 is lifted to a specified height; pulling up the protective frame 401, and when the top of the baffle A402 is attached to the inner side of the storage frame 301, the auxiliary block 502 slides into the square hole B405 through the spring piece and the baffle B503, so that the protective frame 401 is lifted and fixed; when the protection frame 401 needs to be put down, the auxiliary shaft 504 is rotated, the auxiliary shaft 504 drives the two groups of auxiliary gears 505 to rotate, and the two groups of auxiliary gears 505 drive the four groups of auxiliary blocks 502 to simultaneously slide inwards through the four groups of racks 506, so that the auxiliary blocks 502 slide out of the square holes B405; so that the guard 401 falls down by gravity; plays a role in protecting a user by using the protection frame 401; is beneficial to enhancing the safety of a user during use.

Claims (7)

1. A home lift platform, comprising: a base (1); four groups of supporting feet (101) are fixedly arranged at the bottom of the base (1), and two groups of double-headed screws A (102) are rotatably arranged in the base (1); the double-headed screw A (102) is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged in the base (1); synchronous wheels A (103) are fixedly arranged on the outer sides of the two groups of double-headed screws A (102), the number of the synchronous wheels A (103) is two, and a synchronous belt device is arranged between the two groups of synchronous wheels A (103) in a matched mode; the outer sides of the two groups of double-headed screws A (102) are provided with threaded cylinders (104) through threaded connection, the number of the threaded cylinders (104) is four, and the two groups of threaded cylinders (104) are symmetrically arranged; a sliding seat A (105) is fixedly arranged on the outer side of the thread cylinder (104), and the sliding seat A (105) is positioned between the two groups of thread cylinders (104); the top of the sliding seat A (105) is rotatably provided with a lifting rod A (106), and the outer side of the top of the lifting rod A (106) is rotatably provided with a connecting seat A (107); the bottom of the base (1) is fixedly provided with a moving mechanism (2), and the top of the base (1) is fixedly provided with a storage device (3); the outside of the storage device (3) is slidably provided with a protection mechanism (4), and the top of the storage device (3) is fixedly provided with an auxiliary device (5).

2. A home lifting platform as claimed in claim 1, wherein: the moving mechanism (2) includes: a fixing frame (201), a double-head screw B (202), a synchronous wheel B (203) and a guide rod (204); the fixing frame (201) is fixedly arranged at the bottom of the base (1); the double-headed screw B (202) is rotatably arranged in the fixing frame (201), and the number of the double-headed screw B (202) and the number of the fixing frame (201) are two; the double-headed screw B (202) is fixedly arranged at the shaft end of the motor device, and the motor device is fixedly arranged at the outer side of the fixing frame (201); the number of the synchronous wheels B (203) is two, the two synchronous wheels B (203) are respectively and fixedly arranged at the outer sides of the double-headed screw rods B (202), and a synchronous belt device is arranged between the two synchronous wheels B (203) in a matched manner; the guide rod (204) is fixedly arranged in the fixing frame (201).

3. A home lifting platform as claimed in claim 2, wherein: the moving mechanism (2) further comprises: the guide seat (205), the rotating plate (206), the bottom plate (207) and the universal wheel (208); the guide seat (205) is arranged on the outer side of the guide rod (204) in a sliding manner, and the guide seat (205) is arranged on the outer side of the double-end screw rod B (202) through threaded connection; the rotating plates (206) are rotatably arranged at the bottom of the guide seats (205), the number of the rotating plates (206) and the number of the guide seats (205) are four, and the rotating plates (206) and the guide seats (205) are symmetrically arranged; the bottom plate (207) is rotatably arranged at the bottom of the rotating plate (206), and the bottom plate (207) is positioned between the two groups of rotating plates (206); the universal wheel (208) is fixedly arranged at the bottom of the bottom plate (207).

4. A home lifting platform as claimed in claim 1, wherein: the storage device (3) comprises: the storage rack (301), the drawer (302), the handle (303), the cross rod (304), the sliding seat B (305), the lifting rod B (306) and the connecting seat B (307); the storage rack (301) is fixedly arranged at the top of the connecting seat A (107); the drawer (302) is arranged in the storage rack (301) in a sliding way; the handle (303) is fixedly arranged at the outer side of the drawer (302); the cross bars (304) are fixedly arranged at the bottom of the storage rack (301), and the number of the cross bars (304) is two; the sliding seats B (305) are arranged between the two groups of cross bars (304) in a sliding manner, the number of the sliding seats B (305) is two, and the two groups of sliding seats B (305) are symmetrically arranged; the lifting rod B (306) is rotatably arranged at the bottom of the sliding seat B (305), and the lifting rod B (306) is rotatably connected with the lifting rod A (106); the connecting seat B (307) is rotatably arranged at the bottom of the lifting rod B (306), and the connecting seat B (307) is fixedly arranged in the base (1).

5. A home lift platform as claimed in claim 4 wherein: the protection mechanism (4) comprises: a protective frame (401), a baffle A (402), a square hole A (403), a vertical rod (404) and a square hole B (405); the protective frame (401) is arranged at the outer side of the storage frame (301) in a sliding way; the baffle A (402) is fixedly arranged at the outer side of the bottom of the protective frame (401), and the baffle A (402) is arranged at the inner side of the storage frame (301) in a sliding manner; the square hole A (403) is formed in the top side of the protective frame (401), and the square hole A (403) completely penetrates through the protective frame (401); the vertical rods (404) are fixedly arranged at the bottom of the protective frame (401), and the vertical rods (404) are slidably arranged in the storage frame (301); the square hole B (405) is formed in the bottom side of the vertical rod (404), the square hole B (405) completely penetrates through the vertical rod (404), and the square hole B (405) and the square hole A (403) are located on the same axis.

6. A home lifting platform as claimed in claim 5, wherein: the auxiliary device (5) comprises: an auxiliary table (501), an auxiliary block (502) and a baffle B (503); the auxiliary table (501) is fixedly arranged at the top of the storage rack (301); the auxiliary block (502) is arranged in the auxiliary table (501) in a sliding manner, the bottom of the auxiliary block (502) is of a bevel structure, and the auxiliary block (502) is arranged in the inner sides of the square holes A (403) and the square holes B (405) in a sliding manner; baffle B (503) is fixed to be set up in auxiliary block (502) outside, and baffle B (503) slides and sets up in auxiliary table (501) inside to be provided with the spring piece between baffle B (503) outside and auxiliary table (501) inside.

7. A home lifting platform as claimed in claim 6, wherein: the auxiliary device (5) further comprises: an auxiliary shaft (504), an auxiliary gear (505) and a rack (506); the auxiliary shaft (504) is rotatably arranged in the auxiliary table (501), and a hexagonal hole is formed in the top of the auxiliary shaft (504); the auxiliary gears (505) are fixedly arranged outside the auxiliary shafts (504), and the number of the auxiliary gears (505) is two; the rack (506) is arranged in the auxiliary table (501) in a sliding manner, and the rack (506) is fixedly arranged outside the baffle B (503); the number of the racks (506) is four, two groups of racks (506) are meshed with one group of auxiliary gears (505), and the two groups of racks (506) are arranged in a central symmetry mode.