Electric folding accompanying bed

Abstract

The electric folding accompanying bed comprises a fixing frame, a bed board and a driving motor, the bed board comprises a first bed board unit and a second bed board unit, the left end and the right end of the rear end of the second bed board unit are each fixedly provided with a second supporting column, and first rolling wheels are arranged at the bottom ends of the second supporting columns; the bottom of the second bed board is arranged on the rectangular supporting frame and can slide back and forth relative to the rectangular supporting frame, the rear end of the first bed board unit is rotationally connected with the front end of the second bed board unit, and the driving motor is arranged on the fixing frame and connected with the front end of the first bed board unit. The folding bed forms a multi-person chair after being folded, when multiple persons visit a patient in the daytime, multiple visitors can sit down to have a rest, compared with the prior art that a folding bed is only suitable for a single person to use after being folded into a chair, the folding bed meets more requirements of relatives of the inpatient for exploration and accompanying, the width is increased after the folding bed is opened, and the folding bed is convenient to use. The accompanying person can lie down to have a rest at night.

Description

Technical Field

[0001] This invention relates to an electric folding companion bed, belonging to the field of medical companion technology. Background Technology

[0002] The companion bed is used in hospital wards or in the rooms of patients who need companionship at home. In order to reduce the space occupied by the companion bed, the existing protective bed is made into a foldable structure. During the day, the companion bed is folded into a seat for companions or visitors to sit and rest, and at night the companion bed is unfolded for companions to lie down and rest.

[0003] Chinese utility model patent CN221511415U discloses a folding companion bed with an opening buffer function, including a fixed frame, a movable frame, a first backrest support pad assembly, and a second backrest support pad assembly. A seat cushion is connected to the movable frame. The outer ends of the first and second backrest support pad assemblies are respectively hinged to the fixed frame and the movable frame. The inner ends of the first and second backrest support pad assemblies are respectively hinged to a connecting seat, and the bottom of the connecting seat is provided with a support foot. The companion bed also includes a buffer cylinder. The upper end of the buffer cylinder is hinged to the connecting seat, and the lower end of the buffer cylinder is hinged to a connecting member. The front and rear sides of the connecting member are respectively hinged to the lower ends of the front support rod and the rear support rod. The upper ends of the front support rod and the rear support rod are respectively hinged to the first and second backrest support pad assemblies.

[0004] The aforementioned patented companion bed folds into a seat along the long side of the bed. After folding, it is only for single-person use. When other relatives and friends visit the caregiver, the seat, which is only for single-person use, cannot meet the needs of relatives and friends for rest. Summary of the Invention

[0005] The purpose of this invention is to provide an electric folding companion bed, which solves the technical defect of existing folding beds that, when folded into a seat, are only suitable for single-person use and cannot meet the needs of hospitalized patients' relatives and friends for visiting, accompanying, and resting.

[0006] To solve the above problems, the technical solution adopted by the present invention is: an electric folding companion bed, including a fixed frame, a bed board, and a drive motor. The fixed frame includes a left upright plate, a right upright plate, a connecting plate, a rectangular support frame, and two first support columns. The two ends of the connecting plate are fixedly connected to the top ends of the left and right upright plates, respectively. The left and right ends of the front side of the rectangular support frame are fixedly connected to the left and right upright plates, respectively. The top ends of the two first support columns are fixedly connected to the left and right ends of the rear side of the rectangular support frame, respectively. The bed board includes a first bed board unit and a second bed board unit arranged in the left-right direction along the length direction. A second support column is fixed at each of the left and right ends of the rear end of the second bed board unit. A first roller is provided at the bottom end of the second support column. The bottom of the second bed board is provided with... The first bed board unit is placed on a rectangular support frame and can slide back and forth relative to the rectangular support frame. The rear end of the first bed board unit is rotatably connected to the front end of the second bed board unit. The drive motor is mounted on a fixed frame and connected to the front end of the first bed board unit. The drive motor is used to drive the first bed board unit to flip relative to the second bed board unit. When the drive motor drives the front end of the first bed board to flip upward, it pulls the second bed board to slide forward relative to the rectangular support frame and fold into a multi-person chair, where the first bed board unit is the seat and the second bed board unit is the backrest. When the drive motor drives the front end of the first bed board to flip downward, it pushes the second bed board to slide backward relative to the rectangular support frame until the second bed board unit and the first bed board unit are on the same plane. The second bed board unit and the first bed board unit unfold into a horizontal bed board. When the bed board of the present invention is folded, the folding axis is along its length direction. Therefore, the length of the present invention after folding is equal to the length before folding, only the width is reduced. Thus, the present invention forms a multi-person chair after folding, which can be used by multiple visitors to sit and rest during the day when multiple people visit the patient. Compared with the existing technology where the folding bed is only suitable for single use after folding into a chair, the present invention meets more needs of relatives visiting and accompanying hospitalized patients. After unfolding, the width of the present invention increases, which can be used by caregivers to lie down and rest at night.

[0007] As a further improvement of the present invention, guide grooves are provided at both ends of the rectangular support frame along the front-back direction. A fixed seat is fixed on each of the left and right sides of the lower surface of the second bed board unit. A second roller is mounted on each fixed seat and is disposed within the guide groove. When the second bed board unit moves, the second roller rolls within the guide groove. The present invention guides and limits the horizontal movement of the second bed board unit within the rectangular support frame by providing guide grooves on the rectangular support frame, which then cooperate with the second rollers on the fixed seats of the second bed board unit.

[0008] As a further improvement of the present invention, the length of the second bed board unit is greater than that of the first bed board unit. First connecting portions extend forward from both the left and right ends of the front side of the second bed board unit, and the rear end of the first bed board unit extends between the two first connecting portions and is rotatably connected to the two first connecting portions via a first connecting shaft. Both the rear end of the first bed board and the front end of the second bed board are provided with fully rounded corners. The present invention facilitates the rotatable connection between the second bed board unit and the first bed board unit by providing first connecting portions at both the left and right ends.

[0009] As a further improvement of the present invention, two drive motors are used, respectively mounted on the left and right upright plates. The output shafts of the drive motors are connected to lead screws, and each lead screw has a threaded moving block. The left and right ends of the first bed plate unit are rotatably connected to the two moving blocks. The two drive motors rotate synchronously, driving the two lead screws to rotate. The two lead screws, through the moving blocks, drive the first bed plate unit to rotate up and down. In this invention, one drive motor is connected to each of the left and right ends of the first bed plate unit, resulting in more even force distribution and improved rotation of the first bed plate unit.

[0010] As a further improvement of the present invention, the left and right ends of the front side of the first bed board unit each protrude forward to form a second connecting part. A connecting groove is provided on the second connecting part, running through it vertically. A connecting ear is fixed on the movable block, extending into the connecting groove and rotatably connected to the second connecting part by a second connecting shaft. The present invention facilitates the rotatable connection between the first bed board unit and the movable block by forming a second connecting part protruding from the first bed board unit and providing connecting ears on the movable block.

[0011] As a further improvement of the present invention, a linear guide rail is fixed vertically on both the left and right upright plates. A slider is mounted on each linear guide rail, and a moving block is fixed to the slider. A lead screw drives the moving block to move up and down along the linear guide rail. The present invention guides the up-and-down movement of the moving block by using linear guide rails and sliders, ensuring that the moving block moves vertically.

[0012] As a further improvement of the present invention, two upper and lower lead screw fixing seats are fixed on the left and right upright plates respectively. The upper and lower sides of the lead screw are rotatably connected to the lead screw fixing seats by bearings. The drive motor is located below the lower lead screw fixing seat, and its output shaft is vertically upward and connected to the lower end of the lead screw through a coupling. The present invention provides two lead screw fixing seats to limit the lead screw from the upper and lower sides, preventing the lead screw from swinging during use, and making it easier to fold and unfold the present invention.

[0013] As a further improvement of the present invention, the lead screw fixing seat is L-shaped, with its vertical part detachably mounted on the left or right vertical plate using multiple bolts, and its horizontal part used for rotating the lead screw. The L-shaped design of the lead screw fixing seat in this invention facilitates its installation on the left or right vertical plate and also facilitates its rotatable installation with the lead screw.

[0014] As a further improvement of the present invention, the drive motor is mounted on the left or right upright plate using a motor mount. The present invention provides a motor mount to facilitate mounting the drive motor on the left or right upright plate.

[0015] As a further improvement of the present invention, the motor base is L-shaped, with its vertical portion detachably mounted on the left or right vertical plate using multiple bolts. The drive motor is detachably mounted on the horizontal portion of the motor base using multiple bolts. The output axis of the drive motor passes through the horizontal portion of the motor base and connects to the lower end of the lead screw. The L-shaped motor base in the present invention facilitates its mounting on the left or right vertical plate and also facilitates the mounting of the drive motor on the motor base.

[0016] In summary, the beneficial effects of this treatment are: Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the bed board of the present invention in its unfolded state.

[0018] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the bed board of the present invention from another angle when it is unfolded.

[0020] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0021] Figure 5 This is a three-dimensional structural diagram of the present invention folded into a seat state.

[0022] The components are as follows: 1. Fixed frame; 2. Left upright plate; 3. Right upright plate; 4. Connecting plate; 5. Rectangular support frame; 6. First support column; 7. Bed board; 8. First bed board unit; 9. Second bed board unit; 10. Second support column; 11. First roller; 12. Drive motor; 13. Guide groove; 14. Fixed seat; 15. Second roller; 16. First connecting part; 17. First connecting shaft; 18. Lead screw; 19. Moving block; 20. Second connecting part; 21. Connecting groove; 22. Connecting ear; 23. Second connecting shaft; 24. Linear guide rail; 25. Slider; 26. Lead screw fixed seat; 27. Coupling; 28. Motor seat; 29. ​​Fixed part. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 4 The electric folding companion bed shown includes a fixed frame 1, a bed board 7, and a drive motor 12. The fixed frame 1 of this invention includes a left upright plate 2, a right upright plate 3, a connecting plate 4, a rectangular support frame 5, and two first support columns 6. The left upright plate 2 and the right upright plate 3 are parallel and vertically arranged, with equal heights. In use, the bottom ends of the left upright plate 2 and the right upright plate 3 are supported by the ground, and their front sides are placed against the wall of the ward or the patient's room. The left and right ends of the connecting plate 4 are fixedly connected to the top ends of the left upright plate 2 and the right upright plate 3, respectively, and the connecting plate 4 is horizontal. The left and right ends of the front side of the rectangular support frame 5 are fixedly connected to the middle of the left upright plate 2 and the right upright plate 3, respectively. The top ends of the two first support columns 6 are fixedly connected to the left and right ends of the rear side of the rectangular support frame 5, respectively. The bottom ends of the two first support columns 6 are supported by the ground in use. In this invention, the fixed frame 1 is supported by the ground as a whole by the left upright plate 2, the right upright plate 3 and the two first support columns 6. The fixed frame 1 has good stability in use. The length of the rectangular support frame 5 in the left and right directions is less than the distance between the left upright plate 2 and the right upright plate 3. The left and right ends of the front side of the rectangular support frame 5 protrude to the left and right to form fixed parts 29, respectively. The two fixed parts 29 are fixed to the surfaces of the left upright plate 2 and the right upright plate 3 on the opposite side, respectively.

[0025] like Figure 1 and Figure 3 As shown, the bed board 7 of the present invention includes a first bed board unit 8 and a second bed board unit 9 arranged in the left-right direction along the length direction. The second bed board unit 9 is rectangular. A vertical second support column 10 is fixed at each of the left and right ends of the rear end of the second bed board unit 9. A first roller 11 is provided at the bottom end of the second support column 10. The present invention has an installation groove that runs through the left and right sides of the lower end of the second support column 10. The first roller 11 is disposed in the installation groove. The first roller 11 is rotatably installed in the aforementioned installation groove by the roller shaft that runs in the left-right direction and passes through the left and right sides of the second support column 10. In the use state, the first roller 11 is supported by the ground and can roll on the ground.

[0026] like Figure 3 and Figure 4As shown, the bottom of the second bed board 7 in this invention is set on the rectangular support frame 5 and can slide back and forth relative to the rectangular support frame 5. The length of the second bed board 7 in the left and right direction is greater than the length of the rectangular support frame 5 in the left and right direction. The rear end of the first bed board unit 8 is rotatably connected to the front end of the second bed board unit 9. The drive motor 12 in this invention is set on the fixed frame 1 and is connected to the front end of the first bed board unit 8 for driving the first bed board unit 8 to flip relative to the second bed board unit 9.

[0027] When the drive motor 12 drives the front end of the first bed board unit 8 to flip upwards, the second bed board unit 9 cannot flip but can only move back and forth relative to the rectangular support frame 5. Therefore, when the front end of the first bed board unit 8 flips upwards, the rear end pulls the second bed board 7 forward relative to the rectangular support frame 5 to slide forward, folding the invention into a multi-person chair. When the invention is folded into a multi-person chair, the first bed board unit 8 is the seat of the multi-person chair, and the second bed board unit 9 is the backrest of the multi-person chair. When the drive motor 12 drives the front end of the first bed board unit 8 to flip downwards, the rear end of the first bed board unit 8 moves backwards, pushing the second bed board 7 to slide backwards relative to the rectangular support frame 5 until the second bed board unit 9 and the first bed board unit 8 are coplanar. The second bed board unit 9 and the first bed board unit 8 unfold into a horizontal bed board 7. In this state, the invention is used as a companion bed.

[0028] like Figure 4 As shown, in order to allow the second bed board unit 9 to slide back and forth relative to the rectangular support frame 5, the present invention provides a guide groove 13 on each of the left and right end faces of the rectangular support frame 5 along the front-back direction. The guide groove 13 is a rectangular groove. On the left and right sides of the lower surface of the second bed board unit 9, a fixing seat 14 is detachably installed by multiple bolts. A second roller 15 is provided on the fixing seat 14. The second roller 15 is located in the guide groove 13. When the second bed board unit 9 moves, the second roller 15 rolls in the guide groove 13. The guide groove 13 and the second roller 15 work together to prevent the first bed board unit 8 from pulling the second bed board unit 9 upward, and to guide the horizontal movement of the second bed board unit 9, thereby improving the stability of the second bed board unit 9 sliding back and forth relative to the rectangular support frame 5. In the present invention, the length of the first bed board unit 9 in the left-right direction is set to 2 meters, and the width in the front-back direction is set to 0.4-0.5 meters. The width of the second bed board unit 9 in the front-back direction is set to be equal to the width of the first bed board unit 9 in the front-back direction.

[0029] like Figure 3 and Figure 4As shown, the specific structure of the rotatable connection between the first bed board unit 8 and the second bed board unit 9 in this invention is as follows: the length of the second bed board unit 9 is slightly greater than the length of the first bed board unit 8, and the left and right ends of the front side of the second bed board unit 9 each extend forward to form a first connecting part 16. The front end of the first connecting part 16 is provided with a fully rounded corner to form a cylindrical surface. The rear end of the first bed board unit 8 extends between the two first connecting parts 16, and the two ends of the first bed board unit 8 are rotatably connected to the two first connecting parts 16 by a first connecting shaft 17. In order to enable the first bed board unit 8 and the second bed board unit 9 to rotate smoothly, the rear end of the first bed board unit 8 and the front end of the second bed board 9 are both provided with fully rounded corners.

[0030] like Figure 1 , Figure 3 and Figure 5 As shown, in this invention, there are two drive motors 12, which are respectively mounted on the left upright plate 2 and the right upright plate 3. The two drive motors 12 are located on two mutually distant surfaces of the left upright plate 2 and the right upright plate 3, respectively. That is, the drive motor 12 on the left upright plate 2 is mounted on the left side surface of the left upright plate 2, and the drive motor 12 on the right upright plate 3 is mounted on the right side surface of the right upright plate 3. The output shaft of the drive motor 12 is connected to a lead screw 18. A movable block 19 with a threaded engagement is provided on the lead screw 18. The movable block 19 is a rectangular block. The lead screw 18 passes through the upper and lower ends of the movable block 19. The left and right ends of the first bed plate unit 8 are rotatably connected to the two movable blocks 19 respectively. The two drive motors 12 rotate synchronously, driving the two lead screws 18 to rotate synchronously. The two lead screws 18 drive the two movable blocks 19 on them to move up and down synchronously. The up and down movement of the movable blocks 19 drives the first bed plate unit 8 to flip up and down.

[0031] like Figure 1 and Figure 2 As shown, in this invention, the front left and right ends of the first bed board unit 8 each protrude forward to form a second connecting part 20. The front end of the second connecting part 20 is provided with a completely rounded corner. A connecting groove 21 that runs through the second connecting part 20 is provided. A connecting ear 22 is detachably installed on the moving block 19 by multiple bolts. The connecting ear 22 extends into the connecting groove 21, and the connecting ear 22 is rotatably connected to the second connecting part 20 by a second connecting shaft 23, thereby rotatably connecting the first bed board unit 8 and the moving block 19.

[0032] like Figures 1 to 5As shown, in order to improve the stability of the moving block 19 moving up and down, the present invention fixes a linear guide rail 24 on the left side surface of the left vertical plate 2 and the right side surface of the right vertical plate 3 along the vertical direction. The linear guide rail 24 is detachably installed on the left vertical plate 2 or the right vertical plate 3 by multiple bolts. A slider 25 is provided on the linear guide rail 24. The slider 25 can slide up and down relative to the linear guide rail 24. The moving block 19 is detachably installed on the slider 25 by bolts. The lead screw 18 drives the moving block 19 to move up and down along the linear guide rail 24.

[0033] like Figures 1 to 5 As shown, to improve the stability of the lead screw 18, the present invention has two upper and lower lead screw fixing seats 26 fixed on the left vertical plate 2 and the right vertical plate 3 respectively. The upper and lower sides of the lead screw 18 are rotatably connected to the upper and lower lead screw fixing seats 26 by bearings. The drive motor 12 is located below the lower lead screw fixing seat 26, and the output shaft of the drive motor 12 is vertically upward and connected to the lower end of the lead screw 18 through a coupling 27. The lead screw fixing seat 26 in the present invention is L-shaped. The vertical part of the lead screw fixing seat 26 is detachably installed on the left vertical plate 2 or the right vertical plate 3 by multiple bolts, and the horizontal part of the lead screw fixing seat 26 is used for rotatably installing the lead screw 18.

[0034] like Figure 2 and Figure 4 As shown, the drive motor 12 in this invention is mounted on the left vertical plate 2 or the right vertical plate 3 using a motor mount 28. The motor mount 28 is L-shaped. The vertical part of the motor mount 28 is detachably mounted on the left vertical plate 2 or the right vertical plate 3 using multiple bolts. The drive motor 12 is detachably mounted on the horizontal part of the motor mount 28 using multiple bolts. The output axis of the drive motor 12 passes through the horizontal part of the motor mount 28 and is connected to the lower end of the lead screw 18.

[0035] like Figures 1 to 5 As shown, this invention is used in hospital wards. During the day, the first bed board unit 8 can be flipped upward by the drive motor 12, and the second bed board unit 9 can be pulled towards the fixed frame 1, so that the invention can be folded into a multi-person chair for the patient's caregiver to sit down and rest, and the space occupied by the invention in the ward can be reduced. At night, the first bed board unit 8 can be flipped downward by the drive motor 12, so that the second bed board unit 9 is level with the first bed board unit 8, for the caregiver to lie down and rest.

[0036] Unless otherwise specified in the above description, all parts are prior art, or can be implemented using existing technology. Furthermore, the specific embodiments described in this invention are merely preferred embodiments and are not intended to limit the scope of this invention. That is, all equivalent changes and modifications made within the scope of this invention should be considered within the technical scope of this invention.

Claims

1. An electric folding companion bed, characterized in that: include The fixed frame (1) includes a left upright plate (2), a right upright plate (3), a connecting plate (4), a rectangular support frame (5) and two first support columns (6). The two ends of the connecting plate (4) are fixedly connected to the top ends of the left upright plate (2) and the right upright plate (3) respectively. The left and right ends of the front side of the rectangular support frame (5) are fixedly connected to the left upright plate (2) and the right upright plate (3) respectively. The top ends of the two first support columns (6) are fixedly connected to the left and right ends of the rear side of the rectangular support frame (5) respectively. The bed board (7) includes a first bed board unit (8) and a second bed board unit (9) arranged in the left and right directions along the length direction. A second support column (10) is fixed at each of the left and right ends of the rear end of the second bed board unit (9). A first roller (11) is provided at the bottom end of the second support column (10). The bottom of the second bed board (7) is set on a rectangular support frame (5) and can slide back and forth relative to the rectangular support frame (5). The rear end of the first bed board unit (8) is rotatably connected to the front end of the second bed board unit (9). Drive motor (12) is mounted on fixed frame (1). Drive motor (12) is connected to the front end of first bed board unit (8) and is used to drive first bed board unit (8) to flip relative to second bed board unit (9). When the drive motor (12) drives the front end of the first bed board unit (8) to flip upward, it pulls the second bed board (7) to slide forward relative to the rectangular support frame (5) and fold into a multi-person chair, wherein the first bed board unit (8) is the seat and the second bed board unit (9) is the backrest. When the drive motor (12) drives the front end of the first bed board unit (8) to flip downward, it pushes the second bed board (7) to slide backward relative to the rectangular support frame (5) until the second bed board unit (9) and the first bed board unit (8) are coplanar. The second bed board unit (9) and the first bed board unit (8) unfold into a horizontal bed board (7).

2. The electric folding companion bed according to claim 1, characterized in that: The rectangular support frame (5) has guide grooves (13) at both ends along the front and back directions. A fixed seat (14) is fixed on each of the left and right sides of the lower surface of the second bed board unit (9). A second roller (15) is provided on the fixed seat (14). The second roller (15) is located in the guide groove (13). When the second bed board unit (9) moves, the second roller (15) rolls in the guide groove (13).

3. The electric folding companion bed according to claim 1, characterized in that: The length of the second bed board unit (9) is greater than that of the first bed board unit (8). The left and right ends of the front side of the second bed board unit (9) extend forward to form a first connecting part (16). The rear end of the first bed board unit (8) extends between the two first connecting parts (16) and is rotatably connected to the two first connecting parts (16) by a first connecting shaft (17). The rear end of the first bed board unit (8) and the front end of the second bed board (7) are both provided with fully rounded corners.

4. The electric folding companion bed according to claim 1, characterized in that: There are two drive motors (12), which are installed on the left upright plate (2) and the right upright plate (3) respectively. The output shaft of the drive motor (12) is connected to the lead screw (18). The lead screw (18) is provided with a moving block (19) that is threaded to it. The left and right ends of the first bed plate unit (8) are rotatably connected to the two moving blocks (19) respectively. The two drive motors (12) rotate synchronously, driving the two lead screws (18) to rotate. The two lead screws (18) drive the first bed plate unit (8) to flip up and down by moving up and down through the driving moving blocks (19).

5. The electric folding companion bed according to claim 4, characterized in that: The front left and right ends of the first bed board unit (8) each protrude forward to form a second connecting part (20). A connecting groove (21) is provided on the second connecting part (20) and passes through it. A connecting ear (22) is fixed on the moving block (19). The connecting ear (22) extends into the connecting groove (21) and is rotatably connected to the second connecting part (20) by a second connecting shaft (23).

6. The electric folding companion bed according to claim 4, characterized in that: A linear guide rail (24) is fixed on the left vertical plate (2) and the right vertical plate (3) in the vertical direction. A slider (25) is set on the linear guide rail (24). A moving block (19) is fixed on the slider (25). A lead screw (18) drives the moving block (19) to move up and down along the linear guide rail (24).

7. The electric folding companion bed according to claim 4, characterized in that: Two upper and lower screw fixing seats (26) are fixed on the left upright plate (2) and the right upright plate (3). The upper and lower sides of the screw (18) are rotatably connected to the screw fixing seats (26) by bearings. The drive motor (12) is located below the lower screw fixing seat (26), and its output shaft is set vertically upward and connected to the lower end of the screw (18) through a coupling (27).

8. The electric folding companion bed according to claim 7, characterized in that: The lead screw fixing seat (26) is L-shaped. Its vertical part is detachably installed on the left vertical plate (2) or the right vertical plate (3) by multiple bolts, and the horizontal part is used to rotate and install the lead screw (18).

9. The electric folding companion bed according to claim 4, characterized in that: The drive motor (12) is mounted on the left upright plate (2) or the right upright plate (3) using a motor mount (28).

10. The electric folding companion bed according to claim 9, characterized in that: The motor base (28) is L-shaped, and its vertical part is detachably mounted on the left vertical plate (2) or the right vertical plate (3) with multiple bolts. The drive motor (12) is detachably mounted on the horizontal part of the motor base (28) with multiple bolts. The output axis of the drive motor (12) passes through the horizontal part of the motor base (28) and is connected to the lower end of the lead screw (18).

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