CN219621956U - Lifting attic - Google Patents

Abstract

The utility model provides a lifting attic, which is composed of a telescopic support column and an attic bracket, wherein a screw rod is fixedly arranged on a lifting attic frame through a fixedly arranged bearing base, and a motor fixedly arranged on the attic frame drives the screw rod to rotate forwards and backwards; the forward and reverse rotation of the screw rod is converted into the reciprocating movement of a push rod fixedly arranged with the nut along the screw rod through the nut sleeved on the screw rod; the lifting platform is fixedly connected with the bottom end of an inner pipe of a telescopic strut forming the lifting attic frame; traction ropes fixedly arranged on two sides of the lifting platform are fixedly connected with the push rod after passing through guide wheels fixedly arranged on the attic support or in the hollow space of the attic support; when the push rod moves back and forth along the screw rod, the traction rope drives the lifting platform to ascend and descend; the frame of the lifting attic is fixedly provided with corner brace pieces, the lifting attic is fixedly arranged above the indoor space or the indoor stable building through the corner brace pieces which are fixedly arranged, and the lifting platform is adjusted to rise and fall according to use so as to flexibly divide the indoor height space.

Description

Lifting attic

Technical Field

The utility model belongs to the field of home furnishing, and particularly relates to a lifting attic.

Background

Because of the large population of cities and high price, many people choose to purchase small house type houses, so that the using area of the rooms is too small, and the living needs are met on the premise that the existing living area is unchanged; how to more reasonably reform the house so as to effectively expand the application of living space will become a potential requirement of the market.

Disclosure of Invention

Aiming at the potential demands of the market, the utility model provides a lifting attic, which is realized by the following technical scheme.

The utility model provides a lifting attic which is composed of a first telescopic support, a second telescopic support, a third telescopic support, a fourth telescopic support, a first attic support, a second attic support, a fourth attic support, a fifth attic support and a third attic support, wherein the third attic support is fixedly connected with each other to form a lifting attic frame; further, a first bearing base is fixedly arranged on the first attic support in the opposite direction between the first attic support and the third attic support, a second bearing base is fixedly arranged on the third attic support, and a third bearing base and a fourth bearing base are fixedly arranged on the third attic support; further, a second bearing base is fixedly arranged on the first attic bracket and the third attic bracket, and the third bearing base is used for fixedly arranging a first screw rod; the first attic bracket and the third attic bracket are fixedly provided with first bearing bases, and the fourth bearing base is used for fixedly installing a second screw rod; further, one end of the first screw rod penetrates through a third bearing base for fixing the first screw rod and a third transmission wheel which is fixedly arranged behind a third attic bracket for fixing the third bearing base and is connected with a first transmission wheel fixedly arranged on a motor driving shaft fixedly arranged on the lifting attic frame through a second transmission belt; one end of the second screw rod penetrates through a fourth bearing base for fixing the second screw rod and a third attic bracket for fixing the fourth bearing base, and then a second driving wheel is fixedly arranged on the second bearing base; further, the first nut and the second nut which are respectively sleeved on the first screw rod and the second screw rod are fixedly arranged on the push rod; the lifting platform is fixedly arranged at the bottom end of the inner pipe of the first telescopic support, the second telescopic support, the third telescopic support and the fourth telescopic support; the traction ropes are fixedly arranged on two sides of the lifting platform respectively, and the traction ropes fixedly arranged on one side of the lifting platform are fixedly connected with the push rod after passing through the guide wheels fixedly arranged on the first attic bracket; the traction rope fixedly arranged on the other side of the lifting platform passes through a guide wheel fixedly arranged on the fourth attic support in a winding way and penetrates through the third attic support, and is fixedly connected with the push rod after passing through a guide wheel fixedly arranged on the first attic support in a winding way; the lifting attic can be lifted and lowered according to application requirements.

The utility model has the beneficial effects that:

according to the utility model, the lifting attic is fixedly arranged above an indoor space or an indoor stable building through the fixedly arranged corner fitting in the application, and the lifting platform is regulated to rise and fall according to actual use requirements, so that the indoor height space is flexibly divided, and the use of the indoor space is greatly expanded on the premise of unchanged original living area.

Drawings

FIG. 1 is a schematic view of the structure of the lift attic frame of the present utility model.

Fig. 2 is a schematic view of the structure of the telescopic support of the lift attic of the present utility model.

FIG. 3 is a schematic view of the lift attic lift platform of the present utility model installed.

Fig. 4 is a schematic view of the lift pavilion drive mechanism of the present utility model.

Fig. 5 is a schematic diagram of the installation of the lift attic hauling rope of the present utility model.

Fig. 6 is a schematic diagram of the operation of the lift attic drive mechanism of the present utility model.

Fig. 7 is a schematic diagram of an application of the utility model in lifting attic lifting platforms.

Fig. 8 is a schematic view of the lowering application of the lift attic lift platform of the present utility model.

Fig. 9 is a schematic view of an example 2 of the structure of the telescopic support of the lift attic of the present utility model.

Fig. 10 is a schematic view of an embodiment 2 of the lift attic drive mechanism of the present utility model.

Fig. 11 is a schematic view of the lift attic reinforcement of the present utility model.

Reference numerals in fig. 1-11 illustrate.

1, a first telescopic strut; 2, a first attic bracket; 3, a second telescopic strut; 4, a second attic bracket; 5, a third attic bracket; 6, a third telescopic strut; 7, a fourth attic bracket; 8, a fourth telescopic strut; 9, a fifth attic bracket; 10, a sliding rail; 11, an outer tube; 12, an inner tube; 13, lifting the platform; 14, a first bearing mount; 15, a second bearing base; 16, a first screw rod; 17, pushing rod; 18, a first nut; 19, a third bearing mount; 20, a first driving wheel; 21, a motor; 22, a first drive belt; 23, a second driving wheel; 24, a fourth bearing mount; 25, a second nut; 26, a second screw rod; 27, a guide wheel; 28, a guide wheel; 29, a steel wire rope; 30, a guide wheel; 31, a guide wheel; 32, a guide wheel; 33, a steel wire rope; 34, a steel wire rope; 35, a guide wheel; 36, a steel wire rope; 37, limit switch; 38, corner brace; 39, limit switch; 40, corner brace; 41, corner pieces; 42, corner brace; 43, first support columns; 44, second support columns; 45, a first middle tube; 46, second middle tube; 47, a second belt; 48, a third driving wheel; 49, a first reinforcing brace; 50, a second reinforcing bracket; 51, a third reinforcing bracket; 52, a fourth reinforcing brace; 53, fifth reinforcing brace.

Detailed Description

As shown in a schematic view of the structure of the lifting attic frame of the present utility model in fig. 1, a first telescopic strut 1, a second telescopic strut 3, a third telescopic strut 6, a fourth telescopic strut 8, a first attic bracket 2, a second attic bracket 4, a fourth attic bracket 7, a fifth attic bracket 9 and a third attic bracket 5 are fixedly connected with each other to form the lifting attic frame.

Further, a first attic bracket 2, a fourth attic bracket 7 and a third attic bracket 5 which form a lifting attic frame are hollow attic brackets; and openings are drilled in the first attic support 2, the fourth attic support 7, and the third attic support 5.

As shown in the schematic structural diagram of the telescopic support column of the lift attic of the present utility model in fig. 2, the first telescopic support column 1, the second telescopic support column 3, the third telescopic support column 6 and the fourth telescopic support column 8 which form the lift attic frame are two sections of telescopic support columns respectively composed of an inner tube 12, an outer tube 11 and a sliding rail 10, wherein the inner tube 12 is installed inside the outer tube 11 through the sliding rail 10, and forms a telescopic support column in which the inner tube 12 can extend along the track of the sliding rail 10 or retract into the outer tube 11.

As shown in the installation schematic diagram of the lift attic lift platform of the present utility model in fig. 3, the lift platform 13 is fixedly installed with the bottom ends of the inner tubes of the first telescopic support 1, the second telescopic support 3, the third telescopic support 6 and the fourth telescopic support 8, and when the lift platform 13 ascends or descends, the inner tubes of the first telescopic support 1, the second telescopic support 3, the third telescopic support 6 and the fourth telescopic support 8 fixedly installed with the lift platform 13 can extend or retract into the outer tubes of the telescopic supports.

As shown in fig. 4, a second bearing base 15, a third bearing base 19, a first bearing base 14 and a fourth bearing base 24 are fixedly arranged in the opposite directions between the first attic bracket 2 and the third attic bracket 5 respectively for fixedly arranging a first screw rod 16 and a second screw rod 26; one end of the first screw rod 16 penetrates through a third bearing base 19 for fixing the first screw rod 16, a third attic bracket 5 for fixing the bearing base, and a first driving wheel 20 fixedly arranged with the first screw rod 16 and then is connected with a driving shaft of a motor 21 fixed on the lifting attic frame through a coupler; one end of the second screw rod 26 penetrates through a fourth bearing base 24 for fixing the second screw rod 26, and a second driving wheel 23 is fixedly arranged at the bottom end of a third attic bracket 5 for fixing the bearing base, and the second driving wheel 23 is connected with the first driving wheel 20 through a first driving belt 22; the motor 21 can drive the first screw 16 and the second screw 26 to synchronously rotate in the same direction when rotating in the forward and reverse directions.

Further, a first nut 18 and a second nut 25 respectively sleeved on the first screw rod 16 and the second screw rod 26 are fixedly arranged on the push rod 17; when the first screw rod 16 and the second screw rod 26 rotate forward and backward, the first nut 18 and the second nut 25 can convert the forward and backward rotation of the first screw rod 16 and the second screw rod 26 into the forward and backward rotation of the first nut 18, and the push rod 17 fixedly arranged on the second nut 25 moves back and forth along the first screw rod 16 and the second screw rod 26.

Further, a bore is provided in the first nut 18, the second nut 25, and the fixedly mounted push rod 17.

Furthermore, traction ropes are fixedly arranged on two sides of the lifting platform 13 respectively, and the traction ropes fixedly arranged on one side of the lifting platform 13 are fixedly connected with the push rod 17 after passing through guide wheels fixedly arranged on the first attic bracket 2 or in the hollow interior of the first attic bracket 2; the traction rope fixedly arranged on the other side of the lifting platform 13 winds around a guide wheel fixedly arranged on the fourth attic support 7 or arranged in the hollow space of the fourth attic support 7, penetrates through the third attic support 5, winds around a guide wheel fixedly arranged on the first attic support 2 or fixedly arranged in the hollow space of the first attic support 2 after passing through a push rod 17, is fixedly connected with the push rod 17, and drives the lifting platform 13 to synchronously lift and descend through the traction rope fixedly connected with the first lead screw 16 and the second lead screw 26 when the push rod 17 moves back and forth.

Further, in order to ensure balance of the lifting platform 13 and ensure sufficient traction force for the lifting platform 13, at least 2 traction ropes are required to be fixedly connected to two sides of the lifting platform 13, and the upper limit of the number of the traction ropes is not more than the number of guide wheels which can be installed on the first attic bracket 2 or in the hollow interior of the first attic bracket 2; alternatively, a rope, or a wire rope, or a chain may be used as the traction rope of the lift platform, as described below in this embodiment.

As shown in fig. 5, the lift attic haulage rope of the present utility model is schematically installed, and the guide wheel 27, the guide wheel 28, the guide wheel 30, the guide wheel 31 are fixedly installed in the hollow interior of the first attic bracket 2, and the guide wheel 32, the guide wheel 35 are fixedly installed in the hollow interior of the fourth attic bracket 7.

In use, guide wheels 27, 28, 30, 31 may alternatively be fixedly mounted to first attic support 2, 32, 35 may alternatively be fixedly mounted to fourth attic support 7.

Further, in this embodiment, a steel wire rope is used as a traction rope, a traction rope steel wire rope 36 is fixedly installed on one side of the lifting platform 13, and a steel wire rope 29 winds around a guide wheel 27 fixedly installed in the hollow interior of the first attic bracket 2, and is fixedly connected with the push rod 17 after the guide wheel 31; the traction rope steel wire rope 34 fixedly arranged on the other side of the lifting platform 13, the steel wire rope 33 winds around the guide wheel 35 fixedly arranged in the hollow of the fourth attic support 7, the guide wheel 32 penetrates through the third attic support 5, the push rod 17 winds around the guide wheel 28 fixedly arranged in the hollow of the first attic support 2, and the guide wheel 30 is fixedly connected with the push rod 17.

As shown in the working schematic diagram of the lift attic driving mechanism of the present utility model in fig. 6, when the lift platform 13 is required to lift, the motor 21 rotates forward to drive the first screw rod 16 fixedly connected with the motor driving shaft via the coupling and the first driving wheel 20 fixedly installed on the first screw rod 16 to drive the second screw rod 26 fixedly installed with the second driving wheel 23 to rotate synchronously via the first driving belt 22, the first nut 18 sleeved on the first screw rod 16 and the second screw rod 26 convert the forward rotation of the first screw rod 16 and the second screw rod 26 into the push rod 17 fixedly installed with the nut to move along the first screw rod 16 and the second screw rod 26 to the direction side of the third attic bracket 5; a traction rope steel wire rope 36 with one side fixedly installed is driven, the steel wire rope 29 winds the guide wheel 27, and the guide wheel 31 is fixedly connected with the push rod 17; the other side is fixedly provided with a traction rope steel wire rope 34, the steel wire rope 33 passes through a guide wheel 35, the guide wheel 32 passes through the third attic bracket 5, the push rod 17 passes through a guide wheel 28, the guide wheel 30 and the lifting platform 13 fixedly connected with the push rod 17 synchronously ascend, and the ascending height of the lifting platform 13 is consistent with the moving distance of the push rod 17 along the first screw rod 16 and the second screw rod 26.

Further, when the lifting platform 13 is required to descend, the motor 21 reversely rotates to drive the first screw rod 16 fixedly connected with the motor driving shaft through the coupler and the first driving wheel 20 fixedly installed on the first screw rod 16 to synchronously reversely rotate with the second screw rod 26 fixedly installed on the second driving wheel 23 through the first driving belt 22, the first nut 18 sleeved on the first screw rod 16 and the second screw rod 26 converts the reverse rotation of the first screw rod 16 and the second screw rod 26 into the reverse rotation of the first nut 18, and the push rod 17 fixedly installed on the second nut 25 moves along the first screw rod 16 and the second screw rod 26 moves towards the direction side of the first attic bracket 2;

further, at this time, the push rod 17 is fixedly connected with the push rod 17 after passing through the guide wheel 27 and the guide wheel 31 by the traction rope wire rope 36 fixedly arranged on one side of the push rod 17; the other side is fixedly provided with a traction rope steel wire rope 34, the steel wire rope 33 winds around a guide wheel 35, the guide wheel 32 penetrates through the third attic bracket 5, the push rod 17 winds around a guide wheel 28, and the lifting platform 13 fixedly connected with the push rod 17 behind the guide wheel 30 does not have rising tension any more; the lifting platform 13 descends synchronously along with the movement of the push rod 17 under the action of self gravity, and the descending height of the lifting platform 13 is consistent with the moving distance of the push rod 17 along the first screw rod 16 and the second screw rod 26.

The lifting height of the lifting platform 13 is synchronous and consistent with the reciprocating distance of the push rod 17 along the first screw rod 16 and the second screw rod 26; stopping can be achieved when the lifting platform 13 is lifted up and lowered down to a predetermined height position; limit switches are arranged at the preset height position of the lifting platform 13 or the synchronous moving part connected with the lifting platform 13 or at the preset stopping position of the reciprocating movement of the push rod 17 or the synchronous moving part connected with the push rod 17, and are respectively connected in series in a forward and reverse rotation power supply loop of the motor 21 in a default conducting state, and when the lifting platform 13 or the synchronous moving part connected with the lifting platform 13 is lifted to the preset height or the push rod 17 or the synchronous moving part connected with the push rod 17 is reciprocated to the preset stopping position, the limit switches are triggered to be converted into an open state from the original default conducting state, so that the motor 21 is stopped, and the lifting platform 13 is stopped to ascend or descend.

As shown in fig. 7, a lifting application schematic diagram of a lifting attic lifting platform of the utility model is shown, limit switches 37 and 39 are respectively arranged at preset stop positions of reciprocating movement of the push rod 17; the limit switches 37 and 39 are connected in series in the forward and reverse power supply loops of the motor 21 in a default on state.

Furthermore, the lifting attic of the utility model needs to be fixedly arranged above the indoor space when being applied, so that corner brackets are fixedly arranged on the lifting attic frame, and the lifting attic is fixedly arranged above the indoor space or above the indoor firm building through the fixedly arranged corner brackets.

Further, as described above, in the present embodiment, the corner pieces 38, 40, 41 and 42 are fixed to the lift attic frame, respectively, and the lift attic is fixedly installed above the indoor space via the corner pieces fixedly installed to the lift attic frame.

Further, when the lifting platform 13 is required to be lifted; the motor 21 rotates positively, the motor driving shaft drives the first screw rod 16 through the coupling, and drives the second screw rod 26 to synchronously rotate positively through the transmission wheel and the transmission belt, the first nut 18 sleeved on the first screw rod 16 and the second screw rod 26 converts the positive rotation of the second screw rod 26 into the positive rotation with the first nut 18, the push rod 17 fixedly installed on the second nut 25 moves along the first screw rod 16, and the second screw rod 26 moves towards the direction side of the third attic bracket 5; the traction rope steel wire rope 36 with one side fixedly installed is driven, the steel wire rope 29 winds around the guide wheel 27 fixedly installed in the hollow interior of the first attic bracket 2, and the guide wheel 31 is fixedly connected with the push rod 17; the other side is fixedly provided with a traction rope steel wire rope 34, the steel wire rope 33 winds around a hollow inner guide wheel 35 fixedly arranged on the fourth attic support 7, passes through the third attic support 5 after passing through the guide wheel 32, winds around a hollow inner guide wheel 28 fixedly arranged on the first attic support 2 after passing through the push rod 17, and rises synchronously with a lifting platform 13 fixedly connected with the push rod 17 after passing through the guide wheel 30.

And simultaneously, the inner pipes of the first telescopic support column 1, the second telescopic support column 3, the third telescopic support column 6 and the fourth telescopic support column 8 which are fixedly arranged with the lifting platform 13 are retracted into the outer pipe along the slide rail.

Further, when the elevating platform 13 is elevated to a predetermined height position, the push rod 17 moving in synchronization therewith moves to a predetermined limit switch 39 position, and triggers the limit switch 39 to switch from a default on state to an off state, and the motor 21 is stopped.

In order to enhance the bearing capacity of the lifting platform 13 after the lifting attic descends and avoid the gravity borne by the lifting platform 13 from being borne by the threads of the screw rod through the traction rope connected with the lifting platform; the support column is fixedly arranged on the side, facing the first attic support 2, of the push rod 17, and after the lifting platform descends, the support column fixedly arranged on the push rod 17 moves to the first attic support 2, and the support column can effectively share the gravity born by the screw threads of the screw rod. The gravity borne by the lifting platform 13 in use is transferred to the first attic support 2 through a traction rope, and in the embodiment, a first support column 43 and a second support column 44 are fixedly arranged on the side of the push rod 17 facing the direction of the first attic support 2.

As shown in a descending application schematic diagram of the lifting attic lifting platform of the utility model in fig. 8, when the lifting platform 13 is required to descend, a motor 21 reversely rotates a motor driving shaft to drive a first screw rod 16 through a coupler, and drives a second screw rod 26 to synchronously reversely rotate through a transmission wheel and a transmission belt, a first nut 18 sleeved on the first screw rod 16 and the second screw rod 26 converts the reversely rotation of the first screw rod 16 and the second screw rod 26 into a first nut 18, and a push rod 17 fixedly arranged on the second nut 25 moves along the first screw rod 16 and the second screw rod 26 to the side of the direction of the first attic bracket 2.

Further, at this time, the push rod 17 is fixedly connected with the push rod 17 after passing through the guide wheel 27 fixedly arranged in the hollow of the first attic bracket 2 and the guide wheel 31 to the traction rope wire rope 36 fixedly arranged on one side; the other side is fixedly provided with a traction rope steel wire rope 34, the steel wire rope 33 winds around a guide wheel 35 fixedly arranged in the hollow interior of the fourth attic bracket 7, the guide wheel 32 passes through the third attic bracket 5, the push rod 17 winds around a guide wheel 28 fixedly arranged in the hollow interior of the first attic bracket 2, and the lifting platform 13 fixedly connected with the push rod 17 behind the guide wheel 30 does not have rising tension any more; the lifting platform 13 descends synchronously along with the movement of the push rod 17 under the action of self gravity, and simultaneously the inner pipe of the first telescopic support 1, the second telescopic support 3, the third telescopic support 6 and the fourth telescopic support 8 fixedly connected with the lifting platform 13 extend out of the outer pipe of the telescopic support along the slide rail.

Further, when the elevating platform 13 descends to a predetermined height position, the push rod 17 which moves synchronously with the elevating platform moves to a predetermined limit switch 37 position, and triggers the limit switch 37 to switch from a default on state to an off state, and the motor 21 stops; as the lowering of the lift platform 13 is completed, the first support column 43 fixedly mounted on the pushrod 17 and the second support column 44 move onto the first attic support 2, transferring the weight force borne by the lift platform 13 in use to the first attic support 2 via the hauling rope.

As shown in fig. 9, which is a schematic diagram of an embodiment 2 of the structure of the lift attic telescopic prop according to the present utility model, the first telescopic prop 1, the second telescopic prop 3, the third telescopic prop 6, and the fourth telescopic prop 8 may be selected from three telescopic props respectively formed by an inner pipe 12, a first middle pipe 45, and an outer pipe 11 through sliding rails 10; or four telescopic struts consisting of an inner tube 12, a second middle tube 46, a first middle tube 45 and an outer tube 11 respectively passing through the slide rail 10.

As shown in a schematic diagram of an installation embodiment 2 of the lift attic driving mechanism of the present utility model in fig. 10, one end of a first screw rod 16 penetrates through a third bearing base 19 for fixing the first screw rod 16, and a third driving wheel 48 is fixedly installed behind a third attic bracket 5 for fixing the bearing base, and the third driving wheel 48 is a double-row tooth driving wheel; the third driving wheel 48 is connected with the first driving wheel 20 fixedly arranged on the driving shaft of the motor 21 fixedly arranged on the lifting attic frame through the second driving belt 47; one end of the second screw rod 26 penetrates through a fourth bearing base 24 for fixing the second screw rod 26 and a third attic bracket 5 for fixing the bearing base, and then is fixedly provided with a second driving wheel 23, and the second driving wheel 23 is connected with a third driving wheel 48 through a first driving belt 22; the motor 21 can drive the first screw rod 16 to rotate forward and backward, and the second screw rod 26 can synchronously rotate forward and backward.

In order to enhance the stability of the lift attic frame in application, under the premise of not affecting the ascending and descending use of the lift attic lifting platform, a reinforcing support can be optionally added between the outer tubes of the telescopic support posts forming the lift attic frame or between the outer tubes of the telescopic support posts and the attic support to enhance the stability of the lift attic.

As shown in fig. 11, a first reinforcing bracket 49, a second reinforcing bracket 50 and a third reinforcing bracket 51 are optionally arranged between the outer pipes of the first telescopic support 1, the second telescopic support 3 and the third telescopic support 6 of the lifting attic frame and the fourth telescopic support 8 to enhance the stability of the lifting attic, or a fifth reinforcing bracket 53 and a fourth reinforcing bracket 52 are optionally arranged between the fifth attic bracket 9 and the outer pipe of the first telescopic support 1 and between the outer pipe of the fourth telescopic support 8.

The foregoing description of the present utility model will be further illustrated by way of example only, and is not intended to limit the scope of the utility model, which is defined by the appended claims.

Claims (10)

1. The utility model provides a lift attic which characterized in that: the lifting attic frame is formed by the first telescopic support (1), the second telescopic support (3), the third telescopic support (6), the fourth telescopic support (8), the first attic support (2), the second attic support (4), the fourth attic support (7), the fifth attic support (9) and the third attic support (5) through mutual fixed connection; a first bearing base (14), a second bearing base (15) and a third bearing base (19) are fixedly arranged on the first attic support (2) and the third attic support (5) in opposite directions, and a fourth bearing base (24) are fixedly arranged on the third attic support (5); a second bearing base (15) fixedly arranged on the first attic bracket (2) and the third attic bracket (5), and a third bearing base (19) used for fixedly arranging a first screw rod (16); a first bearing base (14) fixedly arranged on the first attic bracket (2) and the third attic bracket (5), and a fourth bearing base (24) used for fixedly arranging a second screw rod (26); one end of the first screw rod (16) penetrates through a third bearing base (19) for fixing the first screw rod (16), a third driving wheel (48) is fixedly arranged behind a third attic bracket (5) for fixing the third bearing base (19), and the third driving wheel (48) is connected with a first driving wheel (20) fixedly arranged on a driving shaft of a motor (21) fixedly arranged on the lifting attic frame through a second driving belt (47); one end of the second screw rod (26) penetrates through a fourth bearing base (24) for fixing the second screw rod (26), and a second driving wheel (23) is fixedly arranged behind a third attic bracket (5) for fixing the fourth bearing base (24), and the second driving wheel (23) is connected with a third driving wheel (48) through a first driving belt (22); the first nut (18) is sleeved on the first screw rod (16) and the second screw rod (26), and the second nut (25) is fixedly arranged on the push rod (17); the lifting platform (13) is fixedly arranged at the bottom end of the inner tube of the first telescopic support (1), the second telescopic support (3), the third telescopic support (6) and the fourth telescopic support (8); traction ropes are fixedly arranged on two sides of the lifting platform (13), and the traction ropes fixedly arranged on one side of the lifting platform (13) are fixedly connected with the push rod (17) after passing through guide wheels fixedly arranged on the first attic bracket (2); the traction rope fixedly arranged on the other side of the lifting platform (13) winds a guide wheel fixedly arranged on the fourth attic support (7), penetrates through the third attic support (5), winds a guide wheel fixedly arranged on the first attic support (2) after passing through the push rod (17), and is fixedly connected with the push rod (17).

2. A lifting attic as recited in claim 1, wherein: the first telescopic support (1), the second telescopic support (3), the third telescopic support (6) and the fourth telescopic support (8) are two sections of telescopic supports respectively composed of an inner pipe (12), an outer pipe (11) and a sliding rail.

3. A lifting attic as recited in claim 1, wherein: the first telescopic support (1), the second telescopic support (3), the third telescopic support (6) and the fourth telescopic support (8) are three sections of telescopic supports which are composed of an inner pipe (12), a first middle pipe (45) and an outer pipe (11) through sliding rails respectively.

4. A lifting attic as recited in claim 1, wherein: the first telescopic support (1), the second telescopic support (3), the third telescopic support (6) and the fourth telescopic support (8) are respectively four sections of telescopic supports formed by inner pipes (12), second middle pipes (46), first middle pipes (45) and outer pipes (11) through sliding rails.

5. A lifting attic as recited in claim 1, wherein: and a limit switch is arranged at the preset ascending and descending height position of the lifting platform (13) or the synchronous moving part connected with the lifting platform (13).

6. A lifting attic as recited in claim 1, wherein: a limit switch is arranged at a preset stop position of the push rod (17) or a synchronous moving part connected with the push rod (17) for reciprocating movement.

7. A lifting attic as recited in claim 1, wherein: the push rod (17) is fixedly provided with a support column on the side facing the direction of the first attic bracket (2).

8. A lifting attic as recited in claim 1, wherein: the hauling rope can be a steel wire rope, a mooring rope or a chain.

9. A lifting attic as recited in claim 1, wherein: at least 2 traction ropes are needed on two sides of the lifting platform (13), and the upper limit of the number of the traction ropes is not greater than the number of guide wheels which can be installed on the first attic bracket (2).

10. A lift attic as claimed in claim 1, wherein: the lifting attic frame is used for enhancing the stability of the lifting attic frame, and a reinforcing support can be optionally added between the outer tubes of the telescopic support columns forming the lifting attic frame or between the outer tubes of the telescopic support columns and the attic support to enhance the stability of the lifting attic.