CN114856149B - Liftable scaffold - Google Patents

Abstract

The invention relates to a lifting scaffold, belonging to the technical field of scaffolds; the operation platform is positioned above the supporting main body, the supporting main body comprises a horizontal fixing frame, four corners of the lower end face of the fixing frame are respectively provided with a supporting leg, each supporting leg comprises an upper leg and a lower leg which are mutually inserted, a telescopic control mechanism is arranged at the joint of the upper leg and the lower leg, the lower end of each lower leg is provided with a supporting leg, the operation platform and the supporting main body are provided with a lifting mechanism, the lower end face of the platform plate is rotatably connected with a lead screw, a handle is arranged in the operation platform and is in transmission connection with the lead screw through a transmission assembly, and the lifting mechanism is driven to ascend and descend through the rotation of the lead screw; the problem of present scaffold frame be not suitable for uneven ground, not co-altitude operation is solved.

Description

Liftable scaffold

Technical Field

The invention belongs to the technical field of scaffolds, and particularly relates to a lifting scaffold.

Background

When the existing scaffold faces uneven ground, a cushion block or a similar component is usually built at the lower part of the existing scaffold for field installation, so that the building stability is influenced, if the existing scaffold needs to perform operations at different heights on the uneven ground, a field building mode needs to be adopted, when the height is insufficient in the operation process, an operator needs to remove the existing scaffold from the scaffold, and then the existing scaffold is built in a heightened manner, so that the operation efficiency is greatly reduced; and when the scaffold is erected on uneven ground, the scaffold is erected up unstably, so that the operation safety of operators is seriously influenced.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a lifting scaffold; the problem that the existing scaffold is not suitable for operation on uneven ground and at different heights is solved.

In order to achieve the above object, the present invention is achieved by the following technical solutions.

A lifting scaffold comprises a supporting main body and an operation platform, wherein the operation platform is positioned above the supporting main body, the supporting main body comprises a horizontal fixing frame, four corners of the lower end face of the fixing frame are respectively provided with a supporting leg, the supporting legs comprise an upper leg and a lower leg which are mutually spliced, a telescopic control mechanism is arranged at the joint of the upper leg and the lower leg, the lower end of each lower leg is provided with a supporting leg, a lifting mechanism is arranged between the operation platform and the supporting main body, the operation platform comprises a horizontal platform plate, the outer edge of the platform plate is provided with a guardrail, the lifting mechanism comprises a left group of hinge rods and a right group of hinge rods, each group of hinge rods comprises a first hinge rod and a second hinge rod which are mutually hinged, one end of each first hinge rod is hinged with the fixing frame through a first hinge seat, and the other end of each first hinge rod is rotatably connected with a first pulley, the one end of second articulated arm is articulated mutually with the platform board through the articulated seat of second, the other end of second articulated arm rotates and is connected with the second pulley, first pulley and second pulley sliding connection respectively are in last track and lower track, it is fixed in on the platform board to go up the track, the track is fixed in on the fixed frame down, it is connected with a connecting rod to rotate between the first articulated arm of two sets of articulated arms, the lower terminal surface of platform board rotates and is connected with a lead screw, the lead screw is spiro union mutually with the connecting rod, the lead screw is connected with the handle in the operation platform through transmission assembly.

Further, the guardrail of landing slab is provided with the guardrail door in one side, supports the main part and is provided with the ladder between two supporting legs of guardrail door downside, the upper end of ladder and the fixed frame looks fixed connection who supports the main part.

Furthermore, a horizontal damping support plate is arranged at the upper end of the support main body, and the lifting mechanism is arranged between the damping support plate and the operation platform; the shock attenuation backup pad is the square frame structure of level setting, sets up directly over fixed frame, is connected through a plurality of bumper shock absorbers between shock attenuation backup pad and the fixed frame.

Furthermore, the shock absorber comprises an upper connecting seat, a lower connecting seat and a shock absorption spring, wherein the upper connecting seat comprises a horizontal disc, a vertical inserting rod is fixedly arranged at the center of the lower end face of the disc, the lower connecting seat comprises a horizontal disc, a vertical inserting cylinder is fixedly arranged at the center of the upper end face of the disc, the inserting rod of the upper connecting seat is downwards inserted into the inserting cylinder of the lower connecting seat, the shock absorption spring is sleeved on the outer side of the inserting cylinder of the lower connecting seat, and the upper end and the lower end of the shock absorption spring are respectively and fixedly connected with the discs of the upper connecting seat and the lower connecting seat; the upper end face of the disc of the upper connecting base is fixedly connected with the lower end face of the shock absorption supporting plate, the lower end face of the disc of the lower connecting base is fixedly connected with the upper end face of the fixing frame, and therefore the fixing frame is connected with the shock absorption supporting plate through the shock absorber.

Further, the first hinge rod and the second hinge rod are equal in length, and the two hinge rods are hinged to each other at the center; two end angles of one short side of the shock absorption supporting plate are respectively provided with a first hinge seat, one ends of the two long sides of the shock absorption supporting plate, which are far away from the first hinge seats, are respectively provided with a lower rail, the lower rails are arranged in an extending manner along the length direction of the long sides, and the upper end surface of each lower rail is provided with a sliding groove along the length direction; two end angles of one short edge of the lower end surface of the platform plate of the working platform are respectively provided with a second hinged seat, one ends, far away from the second hinged seat, of two long edges of the lower end surface of the platform plate are respectively provided with an upper rail, the upper rails are arranged in an extending manner along the length direction of the long edges, and one end surfaces, close to each other, of the two upper rails are respectively provided with a sliding groove along the length direction; the axis of the connecting rod is matched with the axis of the first pulley on the first hinge rod.

Furthermore, the transmission assembly comprises a shell, the shell comprises a vertical section and two horizontal sections, and the two horizontal sections are respectively positioned at the upper end and the lower end of the vertical section and are positioned at the same side of the vertical section; a vertical transmission rod is rotatably connected inside the vertical section through a bearing, and a first bevel gear and a second bevel gear are fixedly arranged at the upper end and the lower end of the transmission rod respectively; a horizontal driving rod is rotatably connected inside the horizontal section at the upper side through a bearing, a third bevel gear is fixedly arranged at one end of the inner side of the driving rod and is meshed with the first bevel gear, and one end of the driving rod, far away from the third bevel gear, is positioned at the outer side of the shell and is fixedly provided with a handle; a horizontal driven rod is rotatably connected inside the horizontal section of the lower side through a bearing, a fourth bevel gear is fixedly arranged at one end of the inner side of the driven rod and meshed with the second bevel gear, and one end, far away from the fourth bevel gear, of the driven rod is fixedly connected with the screw rod through a coupler.

Furthermore, the upper leg and the lower leg are of square tube structures, the upper end of the lower leg is inserted into the lower end of the upper leg, and horizontal clamping grooves are uniformly arranged on the outer side surfaces of the front side and the rear side of the upper end of the lower leg along the vertical direction; the telescopic control mechanism comprises a control shell, the control shell is of a square tube structure and is fixedly arranged on the upper leg, the inner diameter of the control shell is larger than that of the upper leg, and vertical square limiting holes are symmetrically formed in the side walls of the front side and the rear side of the control shell respectively.

Furthermore, a clamping plate is arranged in the control shell, the clamping plate is of a square plate-shaped structure, a square clamping hole is formed in the clamping plate, limiting plates are respectively arranged at the centers of the outer edges of the front side and the rear side of the clamping plate, rotating rods are respectively symmetrically arranged at the centers of the outer edges of the left side and the right side of the clamping plate, the clamping plate is sleeved on the outer side of the lower leg through the clamping hole, the limiting plates on the front side and the rear side of the clamping plate are respectively inserted in the limiting holes on the front side and the rear side of the control shell, the rotating rods on the left side and the right side of the clamping plate penetrate through the side walls on the left side and the right side of the control shell and are rotatably connected with the side walls on the left side and the right side of the control shell through bearings, a U-shaped control rod is arranged on the outer side of the control shell, and two support arm ends of the control rod are respectively and fixedly connected with one end of the two rotating rods, which extend out of the control shell; two dwangs are located the inside part outside of control shell and have cup jointed a torsional spring respectively, the one end and the control shell looks fixed connection of torsional spring, the other end and the joint board fixed connection of torsional spring.

Furthermore, the supporting legs comprise adjusting columns, taper sleeves, ball seats, foot seats and fixing plates; the adjusting column is a vertically arranged cylinder, the upper section area section is provided with external threads, the lower section area section is provided with a taper sleeve connecting section, the middle section area section is provided with an adjusting section, the upper end of the adjusting column is screwed in an internal thread hole at the lower end of the lower leg through the external threads, the taper sleeve is sleeved on the taper sleeve connecting section of the adjusting column, the ball seat is sleeved on the outer side of the taper sleeve through the taper hole, and the fixing disc at the lower end of the taper sleeve is screwed with the adjusting column through a bolt.

Furthermore, the foot seat comprises a foot seat body and a foot seat cover, wherein the foot seat body is in a circular truncated cone structure, the diameter of the upper end surface is smaller than that of the lower end surface, a spherical groove is arranged at the center of the upper end surface, the spherical groove is in a hemispherical structure, and a circular through hole which is communicated up and down is arranged at the bottom surface of the spherical groove; the foot seat cover is of a cylindrical structure, a through hole is formed in the center of the foot seat cover, the upper section of the through hole is cylindrical, the lower section of the through hole is spherical, the inner diameter of the sphere is consistent with that of a spherical groove in the foot seat body, and the inner diameter of the upper section of the through hole is smaller than that of the lower section; the foot seat cover is fixedly connected with the foot seat body through screws arranged on the periphery; the ball seat is arranged in the spherical groove of the foot seat body, and the outer diameter of the spherical outer side surface of the ball seat is the same as that of the spherical inner side surface of the spherical groove so as to keep tight fit.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the scaffold provided by the invention, the lifting mechanism is arranged between the operation platform and the support main body, an operator can control the operation platform to lift only by rotating the handle in the operation platform, and the operator does not need to remove the scaffold and build the scaffold on site, so that the efficiency of on-site operation is greatly improved, the operation time is saved, and accidents of the operator in continuous climbing up and down are prevented.

(2) The scaffold provided by the invention is provided with the telescopic control mechanism and the supporting legs which can be finely adjusted, so that when a certain supporting leg needs to be supported on uneven ground, the supporting leg can be greatly telescopic only by rotating the control rod, and the supporting leg is locked after the control rod is loosened, thereby preventing accidental telescopic action and greatly improving the safety of operation; when fine adjustment in a small range is needed, fine adjustment of the supporting legs can be achieved by rotating the adjusting columns, so that the supporting legs are more attached to the ground; if the supporting legs are positioned at a certain inclination angle, the foot seats are matched and connected with the adjusting columns through spherical surfaces, so that the ball seats and the vertical adjusting columns can be subjected to angle adjustment to a certain degree, the lower end surfaces of the foot seat bodies are more attached to the ground, and the matching surfaces of the adjusting columns and the ball seats are spherical surfaces, so that the vertical supporting force of the adjusting columns cannot be influenced, and the supporting legs of the scaffold are reasonably stressed; through the mode, the scaffold can adapt to uneven ground in different modes.

(3) According to the scaffold provided by the invention, the shock absorber and the shock absorbing support plate are arranged between the lifting mechanism and the support main body, so that the shock generated by an operator in the operation process can be filtered through the shock absorber, and the stability of the scaffold is improved.

Drawings

The invention is described in further detail below with reference to the accompanying drawings:

FIG. 1 is a first perspective view of the present invention in its entirety;

FIG. 2 is a second perspective view of the present invention as a whole;

FIG. 3 is a front view of the present invention as a whole;

FIG. 4 is a side view of the present invention in its entirety;

FIG. 5 is a sectional view A-A of FIG. 3;

figure 6 is a schematic perspective view of the support body;

FIG. 7 is a perspective view of the work platform;

FIG. 8 is a first schematic view of the connection of the lifting mechanism to the shock absorbing support plate;

FIG. 9 is a second schematic view of the connection of the lifting mechanism to the shock absorbing support plate;

FIG. 10 is a schematic view of the structure of the shock absorber;

FIG. 11 is a schematic structural view of the transmission assembly;

FIG. 12 is a front cross-sectional view of the telescoping control mechanism;

FIG. 13 is a side cross-sectional view of the telescoping control structure;

FIG. 14 is a schematic structural view of a foot rest;

wherein, 1 is a supporting body, 2 is a supporting leg, 3 is a damping supporting plate, 4 is an operation platform, 5 is a lifting mechanism, 6 is a ladder, 7 is a fixing frame, 8 is a supporting leg, 9 is an upper leg, 10 is a lower leg, 11 is a telescopic control mechanism, 12 is a reinforcing rod, 13 is a platform plate, 14 is a guardrail, 15 is a guardrail door, 16 is a damper, 17 is an upper connecting seat, 18 is a lower connecting seat, 19 is a damping spring, 20 is an inserting rod, 21 is an inserting cylinder, 22 is a first hinging rod, 23 is a second hinging rod, 24 is a first hinging seat, 25 is a first pulley, 26 is an upper rail, 27 is a lower rail, 28 is a connecting rod, 29 is a screw rod, 30 is a bearing seat, 31 is a transmission component, 32 is a handle, 33 is a shell, 34 is a driving rod, 35 is a transmission rod, 36 is a driven rod, 37 is a first bevel gear, 38 is a bevel gear, 39 is a third bevel gear, 40 is a fourth bevel gear, 41 is a control shell, 42 is a clamping groove, 43 is a clamping plate, 44 is a limiting plate, 45 is a limiting hole, 46 is a rotating rod, 47 is a control rod, 48 is a torsion spring, 49 is an adjusting column, 50 is an adjusting section, 51 is a taper sleeve, 52 is a ball seat, 53 is a fixed disk, 54 is a foot seat body, 55 is a foot seat cover, 56 is a second hinged seat, and 57 is a second pulley.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1 to 14, the invention provides a lifting scaffold, which comprises a support main body 1, support legs 2, a damping support plate 3, a lifting mechanism 5 and a working platform.

Support main 1 includes a fixed frame 7 and four supporting legs 8, fixed frame 7 is the square frame structure that the level set up, evenly is provided with a vertical supporting leg 8 respectively in four angle departments of its lower terminal surface. The supporting legs 8 comprise upper legs 9 and lower legs 10, the lower legs 10 are inserted in the upper legs 9 in a telescopic mode, and the upper ends of the upper legs 9 are fixedly connected with the lower end face of the fixing frame 7. All through stiffener 12 looks fixed connection between two adjacent last legs 9, stiffener 12 is "X" shape structure, and each both ends of controlling respectively with the last leg 9 lateral surface looks fixed connection of both sides to strengthen the joint strength between the adjacent supporting leg 8.

The shock attenuation backup pad 3 is the square frame structure of level setting, and shock attenuation backup pad 3 sets up directly over fixed frame 7, is connected through eight bumper shock absorbers 16 between shock attenuation backup pad 3 and the fixed frame 7, and wherein four bumper shock absorbers 16 set up in four angle departments, and four bumper shock absorbers 16 set up in the center department on every limit in addition.

The shock absorber 16 comprises an upper connecting seat 17, a lower connecting seat 18 and a shock absorbing spring 19, the upper connecting seat 17 comprises a horizontal disc, a vertical inserting rod 20 is fixedly arranged at the center of the lower end face of the disc, the lower connecting seat 18 comprises a horizontal disc, a vertical inserting cylinder 21 is fixedly arranged at the center of the upper end face of the disc, the inserting rod 20 of the upper connecting seat 17 is downwards inserted into the inserting cylinder 21 of the lower connecting seat 18, the shock absorbing spring 19 is sleeved on the outer side of the inserting cylinder 21 of the lower connecting seat 18, and the upper end and the lower end of the shock absorbing spring 19 are respectively fixedly connected with the discs of the upper connecting seat 17 and the lower connecting seat 18.

The upper end surface of the disc of the upper connecting seat 17 is fixedly connected with the lower end surface of the shock absorption supporting plate 3, and the lower end surface of the disc of the lower connecting seat 18 is fixedly connected with the upper end surface of the fixed frame 7, so that the fixed frame 7 is connected with the shock absorption supporting plate 3 through the shock absorber 16.

Work platform includes the square landing slab 13 of a level setting, and landing slab 13 sets up directly over shock attenuation backup pad 3, and the edge of the three direction of the up end of landing slab 13 all is provided with guardrail 14, and the edge of a remaining direction is provided with guardrail door 15 that can open, through guardrail door 15 can get into work platform inside and carry out the operation.

The lifting mechanism 5 is arranged between the working platform and the damping support plate 3 and comprises a left group of hinge rods, a right group of hinge rods, an upper rail 26, a lower rail 27, a screw rod 29, a transmission assembly 31 and a handle 32.

Each set of hinge rods comprises a first hinge rod 22 and a second hinge rod 23, both of which are equal in length and both of which are hinged to each other at the center. The two hinge rods are vertically arranged and extended along the length direction of the shock-absorbing support plate 3.

Two first hinged seats 24 are respectively arranged on two end angles of one short side of the shock absorption supporting plate 3, and the two first hinged seats 24 are respectively hinged with one ends of the first hinged rods 22 of the two groups of hinged rods. Two long edges of the shock-absorbing support plate 3 are provided with a lower rail 27 at the end far away from the first hinge seat 24, the lower rail 27 extends along the length direction of the long edge, and the upper end surface of the lower rail 27 is provided with a sliding groove along the length direction.

Two second hinge seats 56 are respectively arranged on two end corners of one short side of the lower end surface of the platform plate 13 of the working platform, and the two second hinge seats 56 are respectively hinged with one ends of the second hinge rods 23 of the two groups of hinge rods; two long edges of the lower end face of the platform plate 13 are provided with an upper rail 26 respectively at the end far away from the second hinge seat 56, the upper rail 26 extends along the length direction of the long edge, and two end faces of the upper rails 26 close to each other are provided with a sliding groove respectively along the length direction. The two second articulated seats 56 of the work platform are respectively located above the two first articulated seats 24 of the shock-absorbing support plate 3.

The first and second hinge rods 22 and 23 of the two sets of hinge rods are respectively provided with a first and second rotatable pulley 25 and 57 at one end side far away from the hinge seat. The first pulley 25 on the first hinge rod 22 is positioned in the sliding groove of the upper rail 26, and a small gap is kept between the first pulley 25 and the upper surface and the lower surface of the sliding groove of the upper rail 26; the second pulley 57 of the second hinge rod 23 is located in the sliding groove of the lower rail 27, and the second pulley 57 is always in close contact with the bottom surface of the sliding groove of the lower rail 27.

A horizontal screw 29 is provided at the center in the left-right direction on the lower end surface of the platen 13, and the axis of the screw 29 is parallel to the length direction of the upper rails 26 on both sides. Two ends of the screw 29 are respectively rotatably connected with bearing seats 30, and the bearing seats 30 are respectively fixedly arranged on the lower end surface of the platform plate 13.

A connecting rod 28 is arranged between the mutually adjacent end faces of the first hinge rods 22 of the two groups of hinge rods, the connecting rod 28 is rotatably connected with the first hinge rods 22 on the two sides, and the axis of the connecting rod 28 is matched with the axis of the pulley 25 on the first hinge rod 22. The center of the connecting rod 28 is provided with a threaded hole through which the connecting rod 28 is screwed with the screw 29.

The transmission assembly 31 includes a housing 33, and the housing 33 includes a vertical section and two horizontal sections, which are respectively located at the upper and lower ends of the vertical section and located at the same side of the vertical section. The vertical section of the housing 33 is located outside the guardrail 14 on the side remote from the guardrail door 15, the horizontal section of the lower side is located on the lower side of the platform plate 13 and faces the inside of the platform plate 13, and the horizontal section of the upper side is located on the upper side of the guardrail 14 and faces the inside of the working platform.

A vertical transmission rod 35 is rotatably connected inside the vertical section through a bearing, and a first bevel gear 37 and a second bevel gear 38 are fixedly arranged at the upper end and the lower end of the transmission rod 35 respectively; a horizontal driving rod 34 is rotatably connected inside the horizontal section at the upper side through a bearing, a third bevel gear 39 is fixedly arranged at one end of the inner side of the driving rod 34, the third bevel gear 39 is meshed with the first bevel gear 37, and one end of the driving rod 34, which is far away from the third bevel gear 39, is positioned at the outer side of the shell 33 and is fixedly provided with a handle 32; a horizontal driven rod 36 is rotatably connected in the horizontal section at the lower side through a bearing, a fourth bevel gear 40 is fixedly arranged at one end of the inner side of the driven rod 36, the fourth bevel gear 40 is meshed with the second bevel gear 38, and one end of the driven rod 36 far away from the fourth bevel gear 40 is fixedly connected with the screw rod 29 through a coupler.

The connection part of the upper leg 9 and the lower leg 10 of the supporting leg 8 is provided with a telescopic control mechanism 11 which can control the telescopic and locking of the lower leg 10.

The upper leg 9 and the lower leg 10 are both of square tube structures, and the upper end of the lower leg 10 is inserted into the lower end of the upper leg 9. The clamping grooves 42 are uniformly arranged on the outer side surfaces of the front side and the rear side of the upper end of the lower leg 10 along the vertical direction, and the clamping grooves 42 are horizontally arranged and communicated with the outer side surfaces of the left side and the right side of the lower leg 10.

The telescopic control mechanism 11 comprises a control shell 41, the control shell 41 is of a square tube structure, is fixedly arranged on the upper leg 9 and is overlapped with the central line of the upper leg 9, and the distance between the control shell 41 and the lower end of the upper leg 9 is kept. The inner diameter of the control housing 41 is larger than the inner diameter of the upper leg 9.

A vertical square limiting hole 45 is symmetrically arranged on the front side wall and the rear side wall of the control shell 41 respectively.

The control shell 41 is internally provided with a clamping plate 43, the clamping plate 43 is of a square plate-shaped structure, a square clamping hole is formed in the clamping plate 43, the centers of the outer edges of the front side and the rear side of the clamping plate are respectively provided with a limiting plate 44, the width of each limiting plate 44 is smaller than the length of the outer edges of the front side and the rear side of the clamping plate 43, and the limiting plates 44 and the clamping plate 43 are arranged in a coplanar manner. The center of the outer edge of the left and right sides of the clamping plate 43 is symmetrically provided with a rotating rod 46, and the rotating rods 46 are parallel to the left and right direction of the clamping plate 43.

The engaging plate 43 is sleeved on the outer side of the lower leg 10 through the engaging hole. Limiting plates 44 at the front side and the rear side of the clamping plate 43 are respectively inserted into limiting holes 45 at the front side and the rear side of the control shell 41 and can slide up and down in the limiting holes 45; the left and right rotating levers 46 of the engaging plate 43 are kept horizontal and respectively protrude from the left and right side walls of the control case 41, and the left and right rotating levers 46 of the engaging plate 43 are respectively rotatably connected to the left and right side walls of the control case 41 through bearings.

A U-shaped control lever 47 is disposed outside the control housing 41, two ends of two arms of the control lever 47 are respectively fixedly connected to one ends of two rotation rods 46 extending out of the control housing 41, the control plate 43 can be rotated by rotating the control lever 47, and when the control plate 43 rotates inside the control housing 41, the limit plate 44 on the control plate 43 slides up and down in the limit hole 45 of the control housing 41.

Two dwang 46 lie in the inside part outside of control shell 41 and cup joint a torsional spring 48 respectively, and the one end and the control shell 41 of torsional spring 48 are fixed connection mutually, and the other end and the joint board 43 of torsional spring 48 are fixed connection mutually.

When the torsion spring 48 is in the initial state, the clamping plate 43 is in the inclined state, the angle between the clamping plate 43 and the axis of the lower leg 10 is the minimum, the two limiting plates 44 are respectively contacted with the upper ends or the lower ends of the limiting holes 45 at the two sides of the control shell 41, and the clamping holes are tightly clamped with the clamping grooves 42 at the two sides of the lower leg 10. When the clamping plate 43 is rotated by the control rod 47, the clamping hole is separated from the clamping groove 42 on the lower leg 10 until the clamping plate 43 is rotated to be vertical to the lower leg 10, the limiting plate 44 is rotated to the middle height of the limiting hole 45, the clamping hole is completely separated from the periphery of the lower leg 10, and therefore the lower leg 10 can be stretched in the upper leg 9. When the control rod 47 is loosened, the clamping plate 43 is restored to the initial state under the resilience force of the torsion spring 48, so that the clamping hole of the clamping plate 43 is clamped with the clamping groove 42 of the lower leg 10 again, the lower leg 10 cannot stretch and retract continuously, and the upper leg 9 and the lower leg 10 are locked.

The supporting leg 2 comprises an adjusting column 49, a taper sleeve 51, a ball seat 52, a foot seat and a fixed disc 53.

The adjusting column 49 is a vertically arranged cylinder, an external thread is arranged on the upper section of the adjusting column, a taper sleeve connecting section is arranged on the lower section of the adjusting column, and an adjusting section 50 is arranged on the middle section of the adjusting column. The outer diameter of the taper sleeve connecting section is smaller than that of the adjusting column 49, and the outer diameter of the adjusting section 50 is larger than that of the adjusting column 49. The lower end face of the lower leg 10 is provided with an internal threaded hole, and the upper end of the adjusting column 49 is screwed in the internal threaded hole at the lower end of the lower leg 10 through external threads. The outer surface of the adjustment segment 50 is provided with anti-slip patterns.

The taper sleeve 51 is provided with a mounting hole along the axis thereof, the outer side surface of the taper sleeve 51 is a conical surface with a thick upper part and a thin lower part, the taper sleeve 51 is sleeved on the taper sleeve connecting section of the adjusting column 49 through the mounting hole, and the upper end surface of the taper sleeve 51 is contacted with the upper end transition surface of the taper sleeve connecting section.

The upper end surface and the lower end surface of the ball seat 52 are planes, the outer side surface of the middle part is a spherical surface, and the diameter of the upper end surface is larger than that of the lower end surface. The ball seat 52 is provided with a taper hole which is through up and down along the vertical axis, the taper hole is thick at the top and thin at the bottom, the ball seat 52 is sleeved on the outer side of the taper sleeve 51 through the taper hole, and the taper hole is matched and connected with the taper sleeve 51 through a conical surface.

The fixed disc 53 has a circular disc-shaped structure, and the diameter of the fixed disc 53 is smaller than that of the lower end surface of the ball seat 52 and larger than that of the lower end surface of the taper sleeve 51. A through hole is arranged at the center of the fixed disc 53, and a threaded hole is arranged at the center of the lower end surface of the adjusting column 49. The fixing plate 53 is provided at the lower end surface of the taper sleeve 51, and a bolt is screwed with a threaded hole of the lower end surface of the adjusting column 49 through the fixing plate 53, thereby mounting the ball seat 52 and the taper sleeve 51 on the adjusting column 49.

The foot seat comprises a foot seat body 54 and a foot seat cover 55, wherein the foot seat body 54 is of a circular truncated cone structure, the diameter of the upper end face is smaller than that of the lower end face, a spherical groove is arranged in the center of the upper end face and is of a hemispherical structure, and a circular through hole which is communicated up and down is formed in the bottom face of the spherical groove. The foot seat cover 55 is a cylinder structure, a through hole is arranged in the center of the through hole, the upper section of the through hole is cylindrical, the lower section of the through hole is spherical, the inner diameter of the spherical through hole is consistent with that of the spherical groove in the foot seat body 54, and the inner diameter of the upper section of the through hole is smaller than that of the lower section. The foot seat cover 55 is fixedly connected with the foot seat body 54 through screws arranged on the periphery. Ball seat 52 is disposed in the spherical recess of foot seat body 54, and the outer diameter of the spherical outer side of ball seat 52 is the same as the outer diameter of the spherical inner side of the spherical recess so as to maintain a tight fit.

The fixing disc 53 at the lower end of the adjusting column 49 is positioned in the through hole at the bottom surface of the spherical groove of the foot seat body 54, and the inner diameter of the through hole at the bottom surface of the spherical groove of the foot seat body 54 is larger than the outer diameter of the fixing disc 53.

The lower end surface of the foot seat body 54 is provided with anti-skid patterns.

The support body 1 is provided with a ladder 6 between two support legs 8 on the lower side of the guardrail door 15, and the upper end of the ladder 6 is fixedly connected with a fixing frame 7 of the support body 1.

The working principle of the invention is as follows:

the scaffold is first moved to the location where it is to be worked. If the position ground height of operation is not level, the position of certain supporting legs 2 is lower or higher, can be through rotating control lever 47 for joint plate 43 breaks away from the contact with lower leg 10 mutually, can stretch out and draw back the regulation with lower leg 10 like this, thereby make the position adaptation of lower leg 10 corresponding ground, after the adjustment finishes, loosen control lever 47, joint plate 43 will lower leg 10 joint again under torsional spring 48's effect, go up leg 9 and lower leg 10 and lock each other like this, lower leg 10 just can't stretch out and draw back again like this.

If a small gap needs to be adjusted, the adjusting section 50 on the adjusting column 49 is rotated, so that the adjusting column 49 and the lower leg 10 can be extended and retracted in a small range due to screw connection, and the supporting leg 2 can be adjusted in height in a small range, so as to be more attached to the ground.

If the position that supporting legs 2 were located has certain inclination, because the foot stool cooperatees with regulation post 49 through the sphere and is connected, the angle modulation of certain degree just can be carried out with vertical regulation post 49 to ball seat 52 like this to make the lower terminal surface of foot stool body 54 more laminate with ground, and because the fitting surface of adjusting post 49 and ball seat 52 is the sphere, can not influence the vertical holding power of adjusting post 49, guarantee that the supporting leg 8 atress of scaffold is reasonable.

Therefore, the scaffold can be used when the ground is uneven and inclined in a small range, and the stability of the scaffold is not influenced.

After the scaffold is arranged, the operating personnel climb up to the operating platform 4 through the ladder 6. The driving link 34 starts to rotate by rotating the handle 32, the driving link 34 drives the driven link 36 to start to rotate by sequentially passing through the third bevel gear 39, the first bevel gear 37, the second bevel gear 38 and the fourth bevel gear 40, and the driven link 36 drives the screw 29 to start to rotate. Because the screw 29 is in threaded connection with the connecting rod 28, the screw 29 can drive the connecting rod 28 to move, two ends of the connecting rod 28 are connected with the first hinge rod 22, so that the first hinge rod 22 is driven to move, the first pulley 25 on the first hinge rod 22 rolls in the upper track 26, the first pulley 25 on the first hinge rod 22 is far away from or close to the second hinge seat 56 of the second hinge rod 23, so that the hinge angle between the first hinge rod 22 and the second hinge rod 23 is changed, the operation platform 4 is raised or lowered, so that the height of an operator on the operation platform 4 can be adjusted, the scaffold does not need to be rebuilt, the height of the handle 32 is located at the waist position of the operator, the operator can operate without squatting down, and the operation is more convenient and rapid.

Because the shock absorber 16 is arranged between the shock absorbing support plate 3 and the support main body 1, the shock generated during the operation of the operator can be filtered through the shock absorber 16, and the stability of the scaffold during the operation is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides a scaffold frame of liftable which characterized in that: comprises a supporting main body (1) and an operation platform (4), wherein the operation platform (4) is positioned above the supporting main body (1), the supporting main body (1) comprises a horizontal fixing frame (7), four corners of the lower end surface of the fixing frame (7) are respectively provided with a supporting leg (8), the supporting legs (8) comprise an upper leg (9) and a lower leg (10) which are mutually spliced, a telescopic control mechanism (11) is arranged at the joint of the upper leg (9) and the lower leg (10), the lower end of each lower leg (10) is provided with a supporting leg (2), a lifting mechanism (5) is arranged between the operation platform (4) and the supporting main body (1), the operation platform (4) comprises a horizontal platform plate (13), guardrails (14) are arranged at the outer edge of the platform plate (13), the lifting mechanism (5) comprises a left hinged rod and a right hinged rod, each group of hinged rods comprises a first hinged rod (22) and a second hinged rod (23) which are mutually hinged, one end of the first hinged rod (22) is hinged with the fixed frame (7) through a first hinged seat (24), the other end of the first hinged rod (22) is rotatably connected with a first pulley (25), one end of the second hinged rod (23) is hinged with the platform plate (13) through a second hinged seat (56), the other end of the second hinged rod (23) is rotatably connected with a second pulley (57), the first pulley (25) and the second pulley (57) are respectively connected in the upper track (26) and the lower track (27) in a sliding manner, the upper track (26) is fixed on the platform plate (13), the lower track (27) is fixed on the fixed frame (7), a connecting rod (28) is rotatably connected between first hinge rods (22) of the two groups of hinge rods, the lower end face of the platform plate (13) is rotatably connected with a lead screw (29), the lead screw (29) is in threaded connection with the connecting rod (28), and the lead screw (29) is connected with a handle (32) in the operation platform (4) through a transmission assembly (31);

the upper leg (9) and the lower leg (10) are of square tube structures, the upper end of the lower leg (10) is inserted into the lower end of the upper leg (9), and horizontal clamping grooves (42) are uniformly arranged on the outer side surfaces of the front side and the rear side of the upper end of the lower leg (10) along the vertical direction; the telescopic control mechanism (11) comprises a control shell (41), the control shell (41) is of a square tube structure and is fixedly arranged on the upper leg (9), the inner diameter of the control shell (41) is larger than that of the upper leg (9), and vertical square limiting holes (45) are symmetrically formed in the side walls of the front side and the rear side of the control shell (41); the control shell (41) is internally provided with a clamping plate (43), the clamping plate (43) is of a square plate-shaped structure, a square clamping hole is formed in the clamping plate, the centers of the outer edges of the front side and the rear side of the clamping plate are respectively provided with a limiting plate (44), the centers of the outer edges of the left side and the right side of the clamping plate (43) are respectively and symmetrically provided with a rotating rod (46), the clamping plate (43) is sleeved on the outer side of the lower leg (10) through the clamping hole, the limiting plates (44) on the front side and the rear side of the clamping plate (43) are respectively inserted into the limiting holes (45) on the front side and the rear side of the control shell (41), the rotating rods (46) on the left side and the right side of the clamping plate (43) penetrate through the side walls of the left side and the right side of the control shell (41) and are rotatably connected with the side walls of the left side and the right side of the control shell (41) through bearings, the outer side of the control shell (41) is provided with a U-shaped control rod (47), two support arm ends of the rotating rod (47) respectively extend out of the two support arms of the control rod (46) One end is fixedly connected; two dwang (46) are located the inside part outside of control shell (41) and have cup jointed a torsional spring (48) respectively, and the one end and the control shell (41) of torsional spring (48) are fixed connection mutually, and the other end and the joint board (43) of torsional spring (48) are fixed connection mutually.

2. A liftable scaffold according to claim 1, wherein: a guardrail door (15) is arranged on one side of a guardrail (14) of the platform plate (13), a ladder (6) is arranged between two supporting legs (8) of the supporting body (1) on the lower side of the guardrail door (15), and the upper end of the ladder (6) is fixedly connected with a fixing frame (7) of the supporting body (1).

3. A liftable scaffold according to claim 1, wherein: a horizontal damping support plate (3) is arranged at the upper end of the support main body (1), and a lifting mechanism (5) is arranged between the damping support plate (3) and the operation platform (4); the shock absorption supporting plate (3) is of a square frame structure horizontally arranged and is arranged right above the fixed frame (7), and the shock absorption supporting plate (3) is connected with the fixed frame (7) through a plurality of shock absorbers (16).

4. A liftable scaffold according to claim 3, wherein: the shock absorber (16) comprises an upper connecting seat (17), a lower connecting seat (18) and a shock absorption spring (19), the upper connecting seat (17) comprises a horizontal disc, a vertical inserting rod (20) is fixedly arranged at the center of the lower end face of the disc, the lower connecting seat (18) comprises a horizontal disc, a vertical inserting cylinder (21) is fixedly arranged at the center of the upper end face of the disc, the inserting rod (20) of the upper connecting seat (17) is downwards inserted into the inserting cylinder (21) of the lower connecting seat (18), the shock absorption spring (19) is sleeved on the outer side of the inserting cylinder (21) of the lower connecting seat (18), and the upper end and the lower end of the shock absorption spring (19) are fixedly connected with the discs of the upper connecting seat (17) and the lower connecting seat (18) respectively; the upper end face of the disc of the upper connecting seat (17) is fixedly connected with the lower end face of the shock absorption supporting plate (3), the lower end face of the disc of the lower connecting seat (18) is fixedly connected with the upper end face of the fixing frame (7), and therefore the fixing frame (7) is connected with the shock absorption supporting plate (3) through the shock absorber (16).

5. A liftable scaffold according to claim 3, wherein: the first articulation lever (22) and the second articulation lever (23) are of equal length and are articulated to each other in the centre; two end angles of one short side of the shock absorption supporting plate (3) are respectively provided with a first hinged seat (24), one ends of two long sides of the shock absorption supporting plate (3) far away from the first hinged seats (24) are respectively provided with a lower rail (27), the lower rails (27) extend along the length direction of the long sides, and the upper end face of each lower rail (27) is provided with a sliding groove along the length direction; two end angles of one short side of the lower end face of a platform plate (13) of the working platform are respectively provided with a second hinged seat (56), one ends, far away from the second hinged seat (56), of two long sides of the lower end face of the platform plate (13) are respectively provided with an upper rail (26), the upper rails (26) are arranged in an extending mode along the length direction of the long sides, and one end face, close to each other, of the two upper rails (26) is respectively provided with a sliding groove along the length direction; the axis of the connecting rod (28) coincides with the axis of the first pulley (25) on the first hinge rod (22).

6. A liftable scaffold according to claim 5, wherein: the transmission assembly (31) comprises a shell (33), the shell (33) comprises a vertical section and two horizontal sections, and the two horizontal sections are respectively positioned at the upper end and the lower end of the vertical section and positioned at the same side of the vertical section; a vertical transmission rod (35) is rotatably connected inside the vertical section through a bearing, and a first bevel gear (37) and a second bevel gear (38) are fixedly arranged at the upper end and the lower end of the transmission rod (35) respectively; a horizontal driving rod (34) is rotatably connected in the horizontal section on the upper side through a bearing, a third bevel gear (39) is fixedly arranged at one end of the inner side of the driving rod (34), the third bevel gear (39) is meshed with the first bevel gear (37), and one end, far away from the third bevel gear (39), of the driving rod (34) is positioned on the outer side of the shell (33) and is fixedly provided with a handle (32); a horizontal driven rod (36) is rotatably connected inside the horizontal section on the lower side through a bearing, a fourth bevel gear (40) is fixedly arranged at one end of the inner side of the driven rod (36), the fourth bevel gear (40) is meshed with the second bevel gear (38), and one end, far away from the fourth bevel gear (40), of the driven rod (36) is fixedly connected with the screw rod (29) through a coupler.

7. A liftable scaffold according to claim 1, wherein: the supporting leg (2) comprises an adjusting column (49), a taper sleeve (51), a ball seat (52), a foot seat and a fixing plate; adjust post (49) for the cylinder of vertical setting, the regional section of upper segment is provided with the external screw thread, the regional section of lower segment is provided with the taper sleeve linkage segment, the regional section of middle section is provided with adjusts section (50), adjust post (49) upper end through external screw thread spiro union in the internal thread hole of lower leg (10) lower extreme, taper sleeve (51) cup joint on the taper sleeve linkage segment of adjusting post (49), ball seat (52) cup joint in the outside of taper sleeve (51) through the taper hole, fixed disk (53) of the lower extreme of taper sleeve (51) pass through bolt and regulation post (49) looks spiro union.

8. The liftable scaffold of claim 7, wherein: the foot seat comprises a foot seat body (54) and a foot seat cover (55), the foot seat body (54) is of a circular truncated cone structure, the diameter of the upper end face is smaller than that of the lower end face, a spherical groove is arranged at the center of the upper end face and is of a hemispherical structure, and a circular through hole which is communicated up and down is arranged at the bottom face of the spherical groove; the foot seat cover (55) is of a cylindrical structure, a through hole is formed in the center of the foot seat cover, the upper section of the through hole is cylindrical, the lower section of the through hole is spherical, the inner diameter of the sphere is consistent with the inner diameter of a spherical groove in the foot seat body (54), and the inner diameter of the upper section of the through hole is smaller than that of the lower section; the foot seat cover (55) is fixedly connected with the foot seat body (54) through screws arranged on the periphery; the ball seat (52) is arranged in the spherical groove of the foot seat body (54), and the outer diameter of the spherical outer side surface of the ball seat (52) is the same as that of the spherical inner side surface of the spherical groove so as to keep close fit.

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