CN109124050B

CN109124050B - Multifunctional building design platform

Info

Publication number: CN109124050B
Application number: CN201811162194.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Hubei Tiangong Construction Survey And Design Co ltd
Current assignee: Hubei Tiangong construction survey and Design Co.,Ltd.
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-12-25
Anticipated expiration: 2038-09-30
Also published as: CN109124050A

Abstract

The utility model provides a many functional architecture design platform, the loach carrying platform comprises a supporting fram, fix the drawing table on support frame upper portion, a serial communication port, the support frame rear side is equipped with the tray, the lower part of tray is fixed with vertical rack, when the driving shaft forward rotates, the driving shaft can not drive the control shaft through one-way clutch and rotate, the extension spring makes pawl and the ratchet cooperation of pawl structure through the control rack this moment, the ratchet is opposite with the drive gear axle pivoted direction that the one-way transmission direction of pawl complex and driving shaft forward rotate the drive gear axle that drives, when the driving shaft antiport, the driving shaft drives the control shaft earlier and rotates, control shaft and control gear rotate make control rack remove drive pawl structure and ratchet break away from, then drive first gear revolve, the tray rises the corresponding spreading of tablecloth on the drawing table. The drawing table plate and the tablecloth are displayed in front of a user for use according to different requirements. The ratchet wheel and the pawl are matched to prevent the display tray from falling and protect the computer display screen.

Description

Multifunctional building design platform

Technical Field

The invention relates to the technical field of construction design, in particular to a multifunctional building design platform.

Background

With the progress of scientific society and the development of economic society, the construction industry and the design of the construction at present are greatly changed. The period of the building is shorter and shorter at present, and meanwhile, the time required by the building design is also required to be shorter and shorter. However, the existing building design is often simple in design and single in function, and is not suitable for efficient building design. At present, building design does not leave the manufacturing of a computer and a display model, meanwhile, drawing and previewing of drawings on a building platform are required to be carried out on the building platform, the requirements of different using functions on the desktop of the design platform are different, the desktop of multiple building design platforms is required to meet different requirements according to different uses, the best experience can be guaranteed, and the design efficiency is guaranteed.

Disclosure of Invention

In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a multifunctional design platform, which meets the use requirements of drawing, computer drawing and model making on the desktop of the design platform, ensures better design and use experience, and improves the use efficiency of architectural design.

The multifunctional architectural design platform comprises a support frame and a drawing table plate fixed on the upper part of the support frame, and is characterized in that a tablecloth roller and a traction shaft are arranged on the lower part of the drawing table plate, tablecloth is wound on the tablecloth roller, the free end of the tablecloth is connected with at least one traction rope, the traction rope is wound on the traction shaft by bypassing the upper part of a table top, the tablecloth roller and the traction shaft are matched to rotate to withdraw or spread the tablecloth on the drawing table plate, a tray is arranged on the rear side of the support frame, a vertical rack is fixed on the lower part of the tray, a driving gear is meshed with the vertical rack, the driving gear is meshed with a first gear, the first gear is coaxially connected with a driving shaft, the driving shaft is connected with a control shaft through a one-way clutch, a control gear is arranged on the control shaft and meshed with a horizontal control rack, and the control rack is connected with, the control rack is connected with a pawl structure, a ratchet wheel is installed on a driving gear shaft of the driving gear, the driving shaft rotates forwards through the first gear, the driving gear drives the vertical rack to move upwards, when the driving shaft rotates forwards, the driving shaft cannot drive the control shaft to rotate through the one-way clutch, the tension spring enables a pawl of the pawl structure to be matched with the ratchet wheel through the control rack, the one-way transmission direction of the ratchet wheel and the pawl is opposite to the rotating direction of the driving gear shaft driven by the forward rotation of the driving shaft, when the driving shaft rotates reversely, the driving shaft drives the control shaft to rotate firstly, the control rack is enabled to move to drive the pawl structure to be separated from the ratchet wheel through the rotation of the control rack, then the first gear is driven to rotate, and the tray raises the tablecloth and.

Preferably, the first gear is sleeved on the driving shaft through a through hole formed in the first gear, an arc-shaped protruding groove is formed in the inner wall of the through hole, a driving protrusion is arranged on the driving shaft and correspondingly extends into the protruding groove, a gap is reserved between the driving protrusion and the side wall of the protruding groove, a gear base is arranged on the drawing table plate, and the first gear is rotatably connected with the gear base.

Preferably, the control rack is fixedly connected with a guide rod, the support frame is fixedly provided with a control base, the guide rod penetrates through the control base to be slidably connected with the control base, the tension spring is sleeved on the guide rod, and two ends of the tension spring are respectively fixed on the control rack and the control base.

Preferably, the pawl structure comprises a pawl housing, the pawl housing is connected with the control rack through a transmission frame, the pawl is in sliding connection with the pawl housing, a pawl rod is arranged on one side of the pawl, which is far away from the ratchet wheel, the pawl rod penetrates out of the pawl housing and is in sliding connection with the pawl housing, and a pawl pressure spring which is sleeved on the pawl rod and enables the pawl to press the ratchet wheel is arranged between the pawl and the pawl housing.

Preferably, the one-way clutch comprises a one-way ratchet wheel fixedly connected with the driving shaft and an outer sleeve fixedly connected with the control shaft coaxially, the one-way ratchet wheel extends into the outer sleeve, and balls are placed in ratchet grooves of the one-way ratchet wheel.

Preferably, the traction shaft is parallel to the driving shaft, the traction shaft is closer to the driving shaft than the tablecloth stick, the traction shaft is fixed with traction rollers with the number equal to that of the traction ropes, one end, deviating from the table, of each traction rope is wound on the corresponding traction roller, and the two traction ropes are symmetrically arranged on two sides of the tablecloth.

Preferably, the tablecloth roller is connected with the traction shaft through a belt pulley mechanism, the traction shaft is provided with a traction gear, the driving shaft is provided with a second gear meshed with the traction gear, and when the driving shaft rotates in the forward direction, the driving shaft drives the traction roller to wind the traction rope through the second gear and the traction gear so that the tablecloth can be unfolded on the drawing table.

The belt pulley mechanism comprises a driving belt pulley fixedly connected with the traction shaft and a driven belt pulley coaxially connected with the tablecloth roller, the driving belt pulley and the driven belt pulley are connected through a transmission belt, and when acting force between the driving belt pulley and the transmission belt is large, the driving belt pulley and the transmission belt can slide relatively.

Preferably, two parallel table grooves are arranged on the drawing table, and the traction rope passes through the corresponding table groove.

The drawing table plate, the carving table plate and the tablecloth are displayed in front of a user to be used according to different requirements, and different requirements of the user in different times are met. The efficiency of the design is improved. The ratchet wheel and the pawl are matched to prevent the display tray from falling and protect the computer display screen. The lifting edge of the carving table plate has angular deviation, so that the space is saved to the maximum extent.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a top view of fig. 1 in accordance with the present invention.

Fig. 3 is a right side view of fig. 1 of the present invention.

FIG. 4 is a partial schematic view of the present invention taken along direction A of FIG. 3.

FIG. 5 is an enlarged view of FIG. 4B according to the present invention.

FIG. 6 is a schematic view of the present invention taken along line C-C of FIG. 5.

FIG. 7 is an enlarged view of FIG. 6D of the present invention.

FIG. 8 is a schematic view of the second gear of the present invention engaged with the drive shaft.

Fig. 9 is a schematic view of the fastening portion of the present invention.

FIG. 10 is an enlarged view of FIG. 1E of the present invention.

Fig. 11 is an enlarged view of fig. 2F of the present invention.

FIG. 12 is an enlarged view of the invention at FIG. 11G.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 12, a multifunctional architectural design platform comprises a support frame 1 and a drawing table plate 2 fixed on the upper part of the support frame 1, and is characterized in that a tablecloth roller 3 and a traction shaft 4 are arranged on the lower part of the drawing table plate 2, tablecloth 5 is wound on the tablecloth roller 3, at least one traction rope 6 is connected to the free end of the tablecloth 5, the traction rope 6 is wound on the traction shaft 4 by winding the upper part of the table top, the tablecloth roller 3 and the traction shaft 4 are matched to rotate to take back or spread the tablecloth 5 on the drawing table plate 2, a tray 7 is arranged on the rear side of the support frame 1, a vertical rack 8 is fixed on the lower part of the tray 7, a driving gear 9 is meshed with the driving gear 9, a first gear 10 is meshed with the first gear 10, the first gear 10 is coaxially connected with a driving shaft 11, the driving shaft 11 is connected with a control shaft 13 through a one-way clutch 12, the control gear 14 is meshed with a horizontal control rack 15, the control rack 15 is connected with a tension spring 16 which has the same direction with the control rack 15, the control rack 15 is connected with a pawl structure 17, a ratchet 18 is arranged on a drive gear 9 shaft of the drive gear 9, the drive shaft 11 rotates forward and drives a vertical rack 8 to move upwards through a first gear 10 and the drive gear 9, when the drive shaft 11 rotates forward, the drive shaft 11 cannot drive a control shaft 13 to rotate through a one-way clutch 12, the tension spring 16 enables a pawl 19 of the pawl structure 17 to be matched with the ratchet 18 through the control rack 15, the one-way transmission direction of the matching of the ratchet 18 and the pawl 19 is opposite to the direction of the rotation of the drive gear 9 shaft driven by the forward rotation of the drive shaft 11, when the drive shaft 11 rotates reversely, the drive shaft 11 drives the control shaft 13 to rotate firstly, the control shaft 13 and the control gear 14 rotate to enable the, then the first gear 10 is driven to rotate, and the tray 7 raises the tablecloth 5 and correspondingly spreads on the drawing table board 2.

The through hole 20 that first gear 10 set up through it overlaps on driving shaft 11, is equipped with curved protruding groove 21 on the through hole 20 inner wall, is equipped with drive arch 22 on the driving shaft 11, and drive arch 22 correspondingly stretches into protruding groove 21 in, leaves the gap between the lateral wall in drive arch 22 and protruding groove 21, is equipped with the gear base on the drawing table 2, and first gear 10 rotates with the gear base to be connected.

The driving shaft 11 rotates in the positive direction, the driving shaft 11 cannot transmit power to the control shaft 13 through the one-way clutch 12, the control rack 15 controls the rack 15 to move under the action of the tension spring 16, the control rack 15 moves to drive the pawl 19 of the pawl structure 17 to move towards the ratchet wheel 18, and when the tension spring 16 drives the control rack 15 to reach the limit position, the pawl 19 of the pawl structure 17 is meshed with the ratchet wheel 18. Meanwhile, the driving shaft 11 rotates in the forward direction, the driving shaft 11 drives the driving gear 9 to rotate through the first gear, and then the tray 7 fixedly connected with the vertical rack 8 and the upper portion of the vertical rack 8 is driven to move upwards. The rotation of the drive gear 9 shaft of the drive gear 9 caused by the forward rotation of the drive shaft 11 is in the same direction as the unidirectional rotation of the drive gear 9 shaft allowed by the pawl structure 17 in cooperation with the ratchet wheel 18. Ratchet wheel 18 consisting of pawl structure 17 and ratchet wheel 18 the pawl structure 17 will not affect the rotation of the drive gear 9 shaft and drive gear 9. At this time, if the driving gear 9 and the driving shaft 11 stop rotating, the tray 7 and the vertical rack 8 have a tendency to descend, and the tray 7 and the vertical rack 8 descend to cause the driving gear 9 and the driving gear 9 to rotate, and the ratchet wheel 18 and the pawl structure 17 allow the rotation in this direction, so that the ratchet wheel 18 and the pawl structure 17 can effectively prevent the vertical rack 8 and the tray 7 from descending at this time. The driving shaft 11 rotates in a positive direction and stops rotating at any time, and the pawl structure 17 and the ratchet wheel 18 are matched to prevent the tray 7 from falling. The driving gear 9 is arranged on the shaft of the driving gear 9, and the shaft of the driving gear 9 is arranged on the support frame 1 through a bearing seat. The sleeve is coaxially fixed on the first gear, is rotatably connected with the driving shaft 11, is rotatably connected with the gear base, and is matched with the gear base to form a rotating connection structure of the first gear and the gear base.

In order to realize that the control rack 15 can move horizontally and ensure the stability of the control rack 15 in the movement process, a guide rod 26 is fixedly connected to the control rack 15, a control base 27 is fixed on the support frame 1, the guide rod 26 penetrates through the control base 27 and is in sliding connection with the control base 27, the tension spring 16 is sleeved on the guide rod 26, and two ends of the tension spring 16 are respectively fixed on the control rack 15 and the control base 27. The guide rod 26 is away from the control rack 15, the guide rod 26 is inserted into the control base 27 and is connected with the control base 27 in a sliding mode, and the tension spring 16 is sleeved on the guide rod 26, so that the tension spring 16 pulls the control rack 15, and the acting force of the tension spring 16 on the control rack 15 is ensured to be in the horizontal pull rod direction.

In order to facilitate the matching between the pawl structure 17 and the ratchet wheel 18, the pawl structure 17 includes a pawl housing 28, the pawl housing 28 is connected with the control rack 15 through a transmission frame 29, the pawl 19 is slidably connected with the pawl housing 28, a pawl rod 30 on one side of the pawl 19 facing away from the ratchet wheel 18, the pawl rod 30 penetrates out of the pawl housing 28 and is slidably connected with the pawl housing 28, and a pawl pressure spring 31 which is sleeved on the pawl rod 30 and enables the pawl 19 to press towards the ratchet wheel 18 is arranged between the pawl 19 and the pawl housing 28. After the control rack 15 is pulled by the tension spring 16 to move to the extreme position towards the control base 27, at this time, the pawl 19 is matched with the ratchet wheel 18, and the pawl compression spring 31 enables the pawl 19 to press towards the ratchet wheel 18, so that the pawl 19 is matched with the ratchet wheel 18.

In order to make the one-way clutch 12 have more stable performance, the one-way clutch 12 comprises a one-way ratchet wheel 32 fixedly connected with the driving shaft 11 and an outer sleeve 33 coaxially and fixedly connected with the control shaft 13, the one-way ratchet wheel 32 extends into the outer sleeve 33, and balls 34 are placed in ratchet grooves of the one-way ratchet wheel 32. When the driving shaft 11 starts to rotate in the forward direction, the tension spring 16 drives the control gear 14 to rotate through the control rack 15, and then drives the control shaft 13 to rotate, the rotating speed of the driving shaft 11 is greater than the speed of the control shaft 13, the steering of the driving shaft 11 and the steering of the control shaft 13 are the same, and the control gear 14 drives the control shaft 13 to rotate without being limited by the one-way clutch 12.

In order to make the expansion of tablecloth 5 better with the rising complex of tray 7, traction shaft 4 is parallel with driving shaft 11, and traction shaft 4 is closer to driving shaft 11 than 5 rods of tablecloth, and traction shaft 4 is fixed with the carry over pinch rolls 23 that quantity and 6 quantity of haulage rope equal, and the one end winding that haulage rope 6 deviates from the table is on the carry over pinch rolls 23 that correspond, and haulage rope 6 has two and the symmetry setting in 5 both sides of tablecloth. The traction shaft 4 rotates to drive the traction roller 23 to rotate, the traction roller 23 drives the traction rope 6 to be wound on the traction roller 23, and then the traction rope 6 pulls the tablecloth 5 to be unfolded on the drawing table board 2.

In order to reduce a power source, the tablecloth roller 3 is connected with the traction shaft 4 through a belt pulley mechanism, the traction shaft 4 is provided with a traction gear 24, the driving shaft 11 is provided with a second gear 25 meshed with the traction gear 24, and when the driving shaft 11 rotates in the positive direction, the driving shaft 11 drives the traction roller 23 to wind the traction rope 6 through the second gear 25 and the traction gear 24, so that the tablecloth 5 is unfolded on the drawing table plate 2. The driving shaft 11 drives the traction shaft 4 to rotate through the second gear 25 and the traction gear 24, and then drives the traction roller 23 or the tablecloth roller 3 to rotate, namely when the driving shaft 11 rotates in the forward direction, the traction shaft 4 and the traction roller 23 are driven to wind the traction rope 6, and the tablecloth 5 is unfolded on the drawing table plate 2. When the driving shaft 11 rotates reversely, the table cloth roller 3 is driven to rotate through the belt pulley mechanism, and the table cloth 5 is retracted and wound on the table cloth roller 3.

The belt pulley mechanism comprises a driving belt pulley 35 fixedly connected with the traction shaft 4 and a driven belt pulley 36 coaxially connected with the tablecloth roller 3, the driving belt pulley 35 and the driven belt pulley 36 are connected through a transmission belt 37, and when acting force between the driving belt pulley 35 and the transmission belt 37 is large, the driving belt pulley 35 and the transmission belt 37 can slide relatively. The driving shaft 11 rotates forward to drive the traction shaft 4 and the traction roller 23 to rotate for winding the traction rope 6, and at the moment, the traction shaft 4 is driven by a belt pulley mechanism

The drawing table plate 2 is provided with two parallel table plate grooves, and the traction rope 6 penetrates through the corresponding table plate grooves. When the tablecloth 5 is contracted on the tablecloth roller 3, because the pulling rope 6 is placed in the table groove, the pulling rope 6 does not affect the drawing paper on the drawing table 2.

The carving table plate 38 is arranged on the left side of the support frame 1, the carving table plate 38 is connected with a linear driving device and a deflection device, the side edge where the carving table plate 38 and the drawing table plate 2 are located is called as a first edge, the linear driving device drives the moving direction of the carving table plate 38 to be consistent with the first edge all the time, the deflection device intermittently drives the carving table plate 38 to deflect towards the drawing table plate 2, the deflection mechanism is provided with a locking mechanism, and when the deflection mechanism does not drive the carving table plate 38 to deflect, the locking mechanism locks the deflection mechanism so as to prevent the carving table plate 38 from deflecting at the moment.

The linear driving device comprises a side plate rack 39 fixed on one side of the carving table plate 38 close to the support frame 1, the side plate rack 39 is parallel to the side, a side plate gear 40 is meshed with the side plate rack 39, and a shaft of the side plate gear 40 is connected with a steering motor 41.

The deflection device comprises a steering shaft 42, a steering gear 43 is mounted on the steering shaft 42, the steering gear 43 is meshed with a side plate gear 40, the steering shaft 42 is connected with a driving bevel gear 50 shaft 44 through a speed reducer, a first half gear 45 is fixed on the driving bevel gear 50 shaft 44, a second half gear 46 is meshed with the first half gear 45, a fixture block 47 is fixed on one side, away from the first half gear 45, of the second half gear 46, a fixture strip 48 parallel to the side plate rack 39 is arranged on the carving table plate 38, the fixture strip 48 penetrates through the fixture block 47 to be in sliding connection with the fixture block 47, the second half gear 46 is mounted on the support frame 1 through a locking shaft 49, and the axis of the side plate gear 40 is collinear with the axis of the locking shaft 49.

The locking mechanism comprises a driving bevel gear 50, a driven bevel gear 51 is meshed with the driving bevel gear 50, the driven bevel gear 51 is mounted on the support frame 1 through a driven bevel gear shaft 52, the driven bevel gear shaft 52 is vertically arranged, a locking driving gear 53 is mounted on the driven bevel gear shaft 52, the locking driving gear 53 is meshed with a locking driven gear 54, the locking driven gear 54 is mounted on the support frame 1 through a locking control shaft 55, a locking disc 56 is mounted on the locking control shaft 55, a clamping part 57 is arranged on the locking shaft 49, a plurality of fixing grooves 58 are circumferentially arranged on the clamping part 57, an arc-shaped locking bulge 59 is arranged on the side surface of the locking disc 56, the locking bulge 59 is matched with the fixing grooves 58, the locking bulge 59 can extend into the fixing grooves 58 to limit the rotation of the locking shaft 49, and when the first half gear 45 is meshed with the second half gear 46, the locking bulge 59 is, when the first half gear 45 is disengaged from the second half gear 46, the locking projection 59 projects into the fixing groove 58.

The steering motor 41 is provided with a locking device, which locks the output shaft of the motor when the motor is in operation and locks the output shaft of the steering motor 41 when the steering motor 41 stops operating. The forward moving direction of the steering motor 41 is the direction in which the steering motor 41 drives the side plates to move upward through the side plate gear 40 and the side plate rack 39. The motor drives the side plate gear 40 to rotate forward, and the side plate gear 40 drives the side plate rack 39 to move. The locking bar 48 and the locking block 47 cooperate to position and support the pair of engraving tables 38. Meanwhile, the side plate gear 40 drives the steering gear 43 and the steering shaft 42 to rotate, the steering shaft 42 drives the driving bevel gear 50 shaft 44 through the reducer, the bevel gear shaft of the driving shaft 11 intermittently drives the second half gear 46 and the locking shaft 49 to rotate through the first half gear 45, the second half gear 46 drives the carving table 38 to deflect through the fixture block 47 and the fixture strip 48, the driving bevel gear 50 on the driving bevel gear 50 shaft 44 drives the locking control shaft 55 to rotate through the driven bevel gear 51, the locking driving gear 53 and the locking driven gear 54, the locking control shaft 55 rotates to drive the locking disc 56 to rotate, when the first half gear 45 and the second half gear 46 do not drive the locking shaft 49 to rotate, the locking protrusion 59 on the locking turntable is matched with the fixed groove 58, when the first half gear 45 is just meshed with the second half gear 46, the locking protrusion 59 is separated from the locking groove, when the first half gear 45 is separated from the second half gear 46, the locking projection 59 enters the locking groove, and the locking projection 59 is matched with the locking groove to prevent the first half gear 45 and the locking shaft 49 from rotating, so that the first table plate is controlled to rotate. The first half gear 45 and the second half gear 46 intermittently rotate the locking shaft 49 once, and the locking shaft 49 rotates by a deflection angle between the adjacent fixing grooves 58. The engraving table plate 38 can intermittently rotate while the side plate gear 40 and the side plate rack 39 drive the engraving table plate 38 to move upwards. The engraving table 38 is raised to a designated position, and the engraving table 38 is deflected from the initial vertical direction to the horizontal direction and placed on the drawing table 2. When the steering motor 41 rotates reversely, the engraving table 38 is driven to move downward, and the engraving table 38 rotates reversely, so that the engraving table 38 is reset.

When the invention is used and a computer is needed, the driving device 11 drives the display tray to rise, and simultaneously, the tablecloth 5 is automatically paved on the drawing table plate 2. When the building drawing or the research drawing needs to be manually drawn on the drawing table plate 2, the tablecloth 5 on the drawing table plate 2 is retracted, the display tray 15 moves downwards, and the engraving table plate 33 is located at a vertical position. When the building model needs to be made on the carving table plate 33, the carving table plate 33 can be horizontally placed on the drawing table plate 2 under the driving of the rotating motor.

The above-mentioned embodiments do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention by those skilled in the art should be included in the protection scope defined by the claims of the present invention without departing from the design concept of the present invention.

Claims

1. A multifunctional architectural design platform comprises a support frame (1) and a drawing table plate (2) fixed on the upper portion of the support frame (1), and is characterized in that a tablecloth roller (3) and a traction shaft (4) are arranged on the lower portion of the drawing table plate (2), tablecloth (5) is wound on the tablecloth roller (3), at least one traction rope (6) is connected to the free end of the tablecloth (5), the traction rope (6) is wound on the traction shaft (4) by bypassing the upper portion of a table top, the tablecloth roller (3) and the traction shaft (4) are matched to rotate to withdraw or spread the tablecloth (5) on the drawing table plate (2), a tray (7) is arranged on the rear side of the support frame (1), a vertical rack (8) is fixed on the lower portion of the tray (7), a driving gear (9) is meshed with the vertical rack (8), a first driving gear (10) is meshed with the driving gear (9), and the first driving shaft (11) is coaxially connected with the, the driving shaft (11) is connected with a control shaft (13) through a one-way clutch (12), the control shaft (13) is provided with a control gear (14), the control gear (14) is meshed with a horizontal control rack (15), the control rack (15) is connected with a tension spring (16) which has the same direction as the control rack (15), the control rack (15) is connected with a pawl structure (17), a ratchet wheel (18) is arranged on a driving gear (9) shaft of the driving gear (9), the driving shaft (11) rotates forwards and drives a vertical rack (8) to move upwards through a first gear (10) and the driving gear (9), when the driving shaft (11) rotates forwards, the driving shaft (11) cannot drive the control shaft (13) to rotate through the one-way clutch (12), and at the moment, the tension spring (16) enables a pawl (19) of the pawl structure (17) to be matched with the ratchet wheel (18) through the control rack, the one-way transmission direction of the ratchet wheel (18) and the pawl (19) is opposite to the rotation direction of a driving gear (9) shaft driven by the forward rotation of the driving shaft (11), when the driving shaft (11) rotates reversely, the driving shaft (11) drives the control shaft (13) to rotate, the control shaft (13) and the control gear (14) rotate to enable the control rack (15) to move to drive the pawl structure (17) to be separated from the ratchet wheel (18), then the first gear (10) is driven to rotate, and the tray (7) lifts the table cloth (5) and correspondingly spreads on the drawing table plate (2);

the first gear (10) is sleeved on the driving shaft (11) through a through hole (20) formed in the first gear, an arc-shaped protruding groove (21) is formed in the inner wall of the through hole (20), a driving protrusion (22) is arranged on the driving shaft (11), the driving protrusion (22) correspondingly extends into the protruding groove (21), a gap is reserved between the driving protrusion (22) and the side wall of the protruding groove (21), a gear base is arranged on the drawing table plate (2), and the first gear (10) is rotatably connected with the gear base;

fixedly connected with guide arm (26) on control rack (15), be fixed with control base (27) on support frame (1), guide arm (26) pass control base (27) and control base (27) sliding connection, and extension spring (16) cover is fixed respectively on control rack (15) and control base (27) on guide arm (26) and the both ends of extension spring (16).

2. A multi-purpose building design platform according to claim 1, characterized in that the pawl structure (17) comprises a pawl housing (28), the pawl housing (28) is connected to the control rack (15) via a transmission frame (29), the pawl (19) is slidably connected to the pawl housing (28), a pawl lever (30) on the side of the pawl (19) facing away from the ratchet wheel (18), the pawl lever (30) protrudes out of the pawl housing (28) and is slidably connected thereto, and a pawl pressure spring (31) is provided between the pawl (19) and the pawl housing (28) and is sleeved on the pawl lever (30) and presses the pawl (19) towards the ratchet wheel (18).

3. The multifunctional architectural design platform according to claim 1 or 2, wherein the one-way clutch (12) comprises a one-way ratchet wheel (32) fixedly connected with the driving shaft (11) and an outer sleeve (33) coaxially and fixedly connected with the control shaft (13), the one-way ratchet wheel (32) extends into the outer sleeve (33), and balls (34) are placed in ratchet grooves of the one-way ratchet wheel (32).

4. The multifunctional architectural design platform according to claim 1, wherein the traction shaft (4) is parallel to the driving shaft (11), the traction shaft (4) is closer to the driving shaft (11) than the rods of the tablecloth (5), the traction shaft (4) is fixed with the traction rollers (23) with the same number as the traction ropes (6), one end of each traction rope (6) departing from the table is wound on the corresponding traction roller (23), and the two traction ropes (6) are symmetrically arranged on two sides of the tablecloth (5).

5. The multifunctional architectural design platform according to claim 4, wherein the tablecloth roller (3) is connected with the traction shaft (4) through a belt pulley mechanism, the traction shaft (4) is provided with a traction gear (24), the driving shaft (11) is provided with a second gear (25) meshed with the traction gear (24), and when the driving shaft (11) rotates in the forward direction, the driving shaft (11) drives the traction roller (23) to wind the traction rope (6) through the second gear (25) and the traction gear (24) so that the tablecloth (5) is unfolded on the drawing table (2).

6. The multifunctional building design platform according to claim 5, wherein the belt pulley mechanism comprises a driving pulley (35) fixedly connected with the traction shaft (4) and a driven pulley (36) coaxially connected with the tablecloth roller (3), the driving pulley (35) and the driven pulley (36) are connected through a transmission belt (37), and when the acting force between the driving pulley (35) and the transmission belt (37) is large, the driving pulley (35) and the transmission belt (37) can slide relatively.

7. The multifunctional architectural design platform according to claim 1, wherein the drawing desk (2) is provided with two parallel desk slots, and the traction rope (6) passes through the corresponding desk slots.