Steel truss assembling jig frame

Abstract

The invention relates to a steel truss assembly jig frame, and belongs to the technical field of jig frames. The device comprises a plurality of supporting units which are linearly arranged, each supporting unit comprises two sets of supporting assemblies which are symmetrical to each other, and each supporting assembly comprises a bottom plate, a stand column fixedly connected to the bottom plate, a transverse rod slidably connected to the stand column in the vertical direction and a positioning mechanism arranged on the transverse rod; the positioning mechanism comprises a sliding groove formed in the top face of the cross rod and extending in the length direction of the cross rod, a sliding block connected into the sliding groove in a sliding mode, a supporting block fixedly connected to the top of the sliding block, a driving lead screw rotationally supported at the two ends in the sliding groove and connected to the sliding block in a threaded mode, and a driving piece connected to one end of the driving lead screw through a clutch mechanism. The top face of the supporting block is arranged in a V shape, the sliding block is provided with a through hole for the driving lead screw to penetrate through, a plurality of ball grooves are formed in the inner wall of the through hole, and balls connected with threaded grooves in the driving lead screw are connected into the ball grooves in a rolling mode. According to the invention, the problem that the truss is inconvenient to finely adjust in the air in the prior art is solved.

Description

Technical Field

[0002] The invention relates to a steel truss assembly cradle, belonging to the technical field of cradles. Background Art

[0003] With the development of the domestic construction industry, more and more large-span special-shaped three-dimensional space tube truss structures are used in large-scale factories, stadiums, exhibition centers and other projects. The steel pipes used in these projects have thick walls, large diameters, and variable bends, and the cross-sectional shapes and sizes of the three-dimensional space tube trusses are diverse. Due to the large volume of the structure, a large number of ground assembly frames are required for assembly. The traditional ground assembly frame is made according to the spatial modeling and positioning coordinate requirements of the assembly unit to meet the assembly accuracy requirements, and is only suitable for relatively single and standardized assembly units. In addition, most traditional ground assembly frames are fixed, and the elevation and distance cannot be adjusted. The versatility is poor and cannot be reused in multiple projects. It not only causes a great waste of construction units, construction units and social resources, but also directly affects the project schedule and economic benefits.

[0004] In view of the above technical problems, after searching, a Chinese patent with announcement number CN205852606U discloses a three-dimensional space tube truss assembly frame, and its technical key points are: it includes n parallel supporting units, and a longitudinal horizontal beam connecting the supporting units; the supporting unit includes a base, on which a left supporting column, a left supporting rod, a right supporting rod, and a right supporting column are arranged from left to right, and bolts pass through bolt connection holes to fix the left supporting column, the left supporting rod, the right supporting rod, and the right supporting column to the base; a left supporting beam is provided on the left supporting column, and bolts pass through bolt connection holes to fix the left supporting beam to the left supporting column; a right supporting beam is provided on the right supporting column, and bolts pass through bolt connection holes to fix the right supporting beam to the right supporting column; movable clamping plates are provided on the left supporting beam and the right supporting beam.

[0005] In the above scheme, adjustable left supporting column, left supporting rod, right supporting rod and right supporting column are adopted to adapt to the assembly of different three-dimensional space tube trusses. However, when the truss is supported on the tire frame, it is necessary to dock with the adjacent truss units. However, due to problems such as assembly errors, the docking often requires fine-tuning. However, the tire frame is not convenient for adjustment at this time, and the truss needs to be lowered before adjustment, which is time-consuming, labor-intensive and inefficient.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a steel truss assembly frame, which solves the problem in the prior art that the truss is not convenient for fine adjustment in the air.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A steel truss assembly frame, comprising a plurality of support units arranged in a linear manner, wherein the support units include two mutually symmetrical support components, wherein the support components include a bottom plate, a column fixedly connected to the bottom plate, a crossbar slidably connected to the column in a vertical direction, and a positioning mechanism arranged on the crossbar; The positioning mechanism includes a slide groove opened on the top surface of the cross bar and extending along the length direction thereof, a slider slidably connected to the slide groove, a support block fixedly connected to the top of the slider, a driving screw rotatably supported at both ends of the slide groove and threadedly connected to the slider, and a driving member connected to one end of the driving screw through a clutch mechanism. The top surface of the support block is V-shaped, the lead angle of the driving screw is greater than 40°, the slider is provided with a through hole for the driving screw to pass through, the inner wall of the through hole is provided with a plurality of ball grooves, and the ball grooves are all rollingly connected with balls connected to the threaded grooves on the driving screw.

[0009] The present invention is further configured as follows: a sliding groove extending in the vertical direction is provided on one side of the column, a lifting block is slidably connected in the sliding groove, one end of the cross bar is fixedly connected to the lifting block, a triangular support is provided between the bottom of the cross bar and the lifting block, a lifting screw rod which is vertically arranged and threadedly connected to the lifting block is rotatably connected in the sliding groove, and a mounting cavity is provided inside the lifting block; The driving member includes a clutch shaft rotatably connected to the inner side wall of the installation cavity and coaxial with the driving screw, a transmission gear fixedly connected to the clutch shaft, and a crown gear rotatably connected to the inner bottom surface of the installation cavity and meshing with the transmission gear. A spline shaft arranged in a vertical direction is rotatably connected in the sliding groove, a through hole for the spline shaft to pass through is provided on the lifting block, the crown gear is slidably connected to the spline shaft and circumferentially limited by the spline, the clutch shaft is slidably connected to the side wall of the installation cavity along the axial direction of the driving screw and one end extends into the interior of the cross bar, and a clutch groove is provided at the end of the driving screw; The camming mechanism comprises a fixed sleeve fixedly connected to the end face of the clutch shaft and located in the clutch groove, a telescopic rod slidably connected to the fixed sleeve, a supporting spring arranged in the fixed sleeve and abutting the end of the telescopic rod, and a clutch member evenly distributed around the circumference of the fixed sleeve, wherein the clutch member comprises a first support rod at one end hinged on the outer wall of the fixed sleeve, a second support rod at one end hinged on the telescopic rod, and an abutting rod at two ends hinged on the other ends of the first support rod and the second support rod, respectively. A clamping groove evenly distributed around the circumference of the clutch groove is provided on the inner wall of the clutch groove and matched with the abutting rod. When the limiting ring abuts against the end face of the driving screw, the abutting rod is inserted into the clamping groove, and an adjusting member for driving the clutch shaft to move is provided in the mounting cavity.

[0010] The present invention is further configured as follows: a connecting ring groove is provided on the peripheral wall of the clutch shaft located in the installation cavity; the adjusting member includes a through groove provided on the side wall of the lifting block and connected to the installation cavity, and a driving plate hinged at the through groove; the hinge axis of the driving plate is vertically arranged; an extension groove corresponding to the through groove and extending in the vertical direction is provided on the side wall of the column; one end of the driving plate extends to the outside of the column through the extension groove; a pull rope is connected to one end of the driving plate located on the outside of the column; the other end of the driving plate is U-shaped and clamped in the connecting ring groove.

[0011] The present invention is further configured as follows: the limiting ring is a magnetic ring, the end face of the driving screw is fixedly connected with a first magnetic ring extending circumferentially around the outer circumference of the clutch groove, the outer wall of the lifting block corresponding to the part inside the cross bar is fixedly connected with a second magnetic ring, the second magnetic ring extends circumferentially around the clutch shaft, and the limiting ring is made of magnetic material.

[0012] The present invention is further configured as follows: the lifting screw is provided with two groups, the spline shaft is located between the two lifting screws, a worm gear is provided at the bottom end of each lifting screw, a worm gear is rotatably supported at the bottom of the sliding groove through an axle seat and is respectively meshed with the worm gears on both sides, one end of the worm gear extends to the outside of the column and is provided with a first hexagonal groove, the bottom end of the spline shaft is fixedly connected to a first bevel gear located above the worm gear, the inner side wall of the sliding groove is rotatably connected to a horizontally arranged driving shaft, the end of the driving shaft is fixedly connected to a second bevel gear meshed with the first bevel gear, and the other end of the driving shaft extends to the outside of the column and is provided with a second hexagonal groove.

[0013] The present invention is further configured as follows: guide wheels are provided at the four corners of the side wall of the lifting block, the rotation axis of the guide wheels is parallel to the cross bar, guide grooves corresponding to the guide wheels are provided at the four corners of the inner wall of the sliding groove, the guide wheels roll and abut against the inner wall of the guide groove, guide gears are provided at both ends of the peripheral wall of the guide wheel, and two guide racks respectively meshing with the guide gears are fixedly connected to the inner wall of the guide groove on one side close to the cross bar.

[0014] The present invention is further configured as follows: a portion of the guide wheel located between the guide gears at both ends is provided with a plurality of elastic ratchets, the elastic ratchets include a receiving groove opened on the peripheral wall of the guide wheel, a pawl hinged at one end to the receiving groove, and a tension spring connected between the receiving groove and the pawl; a ratchet bar corresponding to the pawl is fixedly connected to the inner wall of the guide groove on one side away from the cross bar, and the teeth of the ratchet bar are inclined upward.

[0015] The present invention is further configured as follows: a mounting groove is provided on the top surface of the support block, a first positioning plate and a second positioning plate are provided in the mounting groove, the first positioning plate and the second positioning plate are both semicircular and have a cut surface facing upward, the axes of the first positioning plate and the second positioning plate are spaced apart in the length direction of the crossbar, two supporting wheels are provided on the top surfaces of the first positioning plate and the second positioning plate, the two supporting wheels are respectively located on both sides of the axis of the first positioning plate or the second positioning plate, and the supporting wheel on the top surface of the first positioning plate close to the second positioning plate and the supporting wheel on the top surface of the second positioning plate close to the first positioning plate are spaced apart; The first positioning plate and the second positioning block are respectively provided with a first connecting groove and a second connecting groove extending in an arc shape around the center of the circle, and the first connecting groove and the second connecting groove respectively penetrate axially along the first positioning plate and the second positioning plate, and the first connecting rod and the second connecting rod respectively penetrate the first connecting groove and the second connecting groove are fixedly connected in the installation groove, and the first connecting rod and the second connecting rod are respectively slidably connected to the first connecting groove and the second connecting groove, and the cross-sections of the first connecting rod and the second connecting rod are both arc-shaped plates matching the first connecting groove and the second connecting groove, and the end of the first connecting groove is provided with a reset spring abutting against the first connecting rod, and the end of the second connecting groove is provided with a reset spring abutting against the second connecting rod.

[0016] The present invention is further configured as follows: the first positioning plates and the second positioning plates are each provided with a plurality of groups, and the plurality of the first positioning plates and the plurality of the second positioning plates are alternately arranged in the axial direction thereof.

[0017] The present invention is further configured such that: a V-shaped groove is provided at the center of the top surface of each of the first positioning plate and the second positioning plate.

[0018] The beneficial effects of the present invention are: 1. By setting a cross bar that can slide on the column and a support block that can slide on the cross bar, when the tire frame is supported, insert the electric tool into the first hexagonal slot, and start the two lifting screws to rotate through the cooperation of the worm gear, so as to drive the lifting block to move in the vertical direction. First, lower the cross bar to make it easier for the staff to place the truss unit. Then, by synchronously raising the cross bars on both sides, drive the truss unit to move to the specified height. At this time, if the angle of the truss needs to be fine-tuned, the driving plate is driven to swing through the pull rope, so that the clutch shaft and The driving screw is separated. At this time, the truss is driven to move in the vertical direction through the lifting cross bar. If the truss needs to be moved horizontally, only the clutch shaft and the driving screw in the support assembly on one side are separated, and the second hexagonal slot is inserted through an electric tool. The driving screw in the cross bar on the other side is driven to rotate through the spline shaft, thereby driving the truss to move horizontally, and the other side of the truss can follow the movement. After the adjustment is completed, the driving screw and the clutch shaft are connected by pulling the pull ropes on both sides, so that the driving screw is fixed in its state to ensure the stability of the support block; 2. By respectively arranging the first magnetic attraction ring and the second magnetic attraction ring on the end face of the driving screw and the outer wall of the lifting block, the limiting ring can be adsorbed on the end face of the first magnetic attraction ring when the driving screw and the clutch shaft are connected, so that the connection state between the driving screw and the clutch shaft is more stable, and when the driving screw and the clutch shaft are separated, the limiting ring is adsorbed on the end face of the second magnetic attraction ring, so that the separation state between the driving screw and the clutch shaft is more stable; 3. By setting guide wheels at the four corners of the lifting block, and setting guide racks on the inner side wall of the guide groove to cooperate with the guide gear, the lifting block can be more stable during the lifting process, and by setting the elastic ratchet and the ratchet bar to cooperate, when the lifting screw suddenly fails and the cross bar and the truss located above fall, the ratchet on the peripheral wall of the guide wheel overcomes the elastic force of the tension spring under the action of centrifugal force, extends out of the storage groove, and is clamped on the ratchet bar, thereby limiting the lifting block from falling and preventing the truss from being damaged; 4. By arranging the first positioning plate and the second positioning plate inside the support block, and arranging two supporting wheels on the top surfaces of the first positioning plate and the second positioning plate respectively, when the truss is placed on the top surface of the support block, the rod on the truss corresponds to the gap between the supporting wheels close to the first positioning plate and the second positioning plate, and the first positioning plate and the second positioning plate can rotate under the limit of the first connecting rod and the second connecting rod when subjected to gravity, so that the supporting wheels flip over. After flipping, the supporting wheels on the first positioning plate and the second positioning plate that are far away from each other can also clamp the rod of the truss, thereby ensuring the stability of the truss, and the truss can be flipped and adjusted; 5. By opening a V-shaped groove on the top surface of the first positioning plate and the second positioning plate, when the support block needs to support the square rod, the two edges of the rod can be supported by the V-shaped groove, which has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the supporting component part of the present invention.

[0021] Figure 3 It is a cross-sectional view of the lifting block part of the present invention.

[0022] Figure 4 It is a partial cross-sectional view of the bottom of the column in the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the cooperation between the lifting block and the cross bar in the present invention.

[0024] Figure 6 It is a structural schematic diagram of the guide wheel part in the present invention.

[0025] Figure 7 It is a schematic structural diagram of the cooperation between the guide wheel and the guide groove in the present invention.

[0026] Figure 8 yes Figure 2 A partial enlarged view of part A.

[0027] Fig. 9 yes Figure 2 A partial enlarged view of part B.

[0028] Fig.10 It is a structural schematic diagram of the support block part in the present invention.

[0029] Fig.11 It is a schematic diagram of the structure of the cooperation between the first positioning plate and the second positioning plate in the present invention.

[0030] In the figure: 1, support assembly; 2, bottom plate; 3, column; 4, cross bar; 5, positioning mechanism; 6, sliding groove; 7, lifting block; 8, triangular support; 9, lifting screw; 10, worm wheel; 11, worm; 12, first hexagonal groove; 13, guide wheel; 14, guide groove; 15, guide gear; 16, guide rack; 17, elastic ratchet; 18, storage groove; 19, pawl; 20, tension spring; 21, ratchet bar; 22, slide groove; 23, slider; 24, support block; 25, drive screw; 26, clutch mechanism; 27, driving member; 28, through hole; 29, ball groove; 30, ball; 31, mounting cavity; 32, clutch shaft; 33, transmission gear; 34, crown gear; 35, spline shaft; 36, perforation; 37, clutch The first and second support rods are as follows: the first and second support rods are as follows: the first and second support rods are as follows: the first and second support rods are as follows: the first and second support rods are as follows: DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0032] like Figure 1-Figure 11 As shown, a steel truss assembly frame includes a plurality of support units arranged in a linear manner, and the support units include two groups of support components 1 that are symmetrical to each other. The support components 1 include a base plate 2, columns 3 fixedly connected to the base plate 2, cross bars 4 slidably connected to the columns 3 along a vertical direction, and a positioning mechanism 5 arranged on the cross bars 4, wherein the base plate 2 is a rectangular plate that can be fixed to the ground by expansion bolts or chemical anchors.

[0033] A sliding groove 6 extending along the vertical direction is provided on one side of the column 3, and a lifting block 7 is slidably connected in the sliding groove 6. One end of the cross bar 4 is fixedly connected to the lifting block 7, and a triangular support 8 is provided between the bottom of the cross bar 4 and the lifting block 7. A lifting screw 9 which is vertically arranged and threadedly connected to the lifting block 7 is rotatably connected in the sliding groove 6. There are two groups of lifting screws 9, and a worm gear 10 is provided at the bottom of each lifting screw 9. A worm 11 which is respectively meshed with the worm gears 10 on both sides is rotatably supported at the bottom of the sliding groove 6 through an axle seat. One end of the worm 11 extends to the outside of the column 3 and is provided with a first hexagonal groove 12.

[0034] Guide wheels 13 are provided at the four corners of the side wall of the lifting block 7, and the rotation axis of the guide wheel 13 is parallel to the cross bar 4. Guide grooves 14 corresponding to the guide wheels 13 are provided at the four corners of the inner wall of the sliding groove 6. The guide wheel 13 rolls against the inner wall of the guide groove 14, and guide gears 15 are provided at both ends of the peripheral wall of the guide wheel 13. Two guide racks 16 that are respectively meshed with the guide gears 15 are fixedly connected to the inner wall of the guide groove 14 on one side close to the cross bar 4.

[0035] The portion of the guide wheel 13 located between the guide gears 15 at both ends is provided with a plurality of elastic ratchets 17, the elastic ratchets 17 include a receiving groove 18 opened on the peripheral wall of the guide wheel 13, a pawl 19 hinged at one end to the receiving groove 18, and a tension spring 20 connected between the receiving groove 18 and the pawl 19. A ratchet bar 21 corresponding to the pawl 19 is fixedly connected to the inner wall of the guide groove 14 on the side away from the cross bar 4, and the teeth of the ratchet bar 21 are inclined upward.

[0036] By arranging guide wheels 13 at the four corners of the lifting block 7, and arranging guide racks 16 on the inner wall of the guide groove 14 to cooperate with the guide gear 15, the lifting block 7 can be made more stable during the lifting process, and by arranging the elastic ratchet 17 and the ratchet bar 21 to cooperate, when the lifting screw 9 suddenly fails and the cross bar 4 and the truss located above fall, the ratchet 19 on the peripheral wall of the guide wheel 13 overcomes the elastic force of the tension spring 20 under the action of centrifugal force, extends out of the receiving groove 18, and is clamped on the ratchet bar 21, thereby limiting the lifting block 7 from falling and preventing the truss from being damaged.

[0037] The positioning mechanism 5 includes a slide groove 22 opened on the top surface of the cross bar 4 and extending along its length direction, a slider 23 slidably connected to the slide groove 22, a support block 24 fixedly connected to the top of the slider 23, a driving screw 25 rotatably supported at both ends of the slide groove 22 and threadedly connected to the slider 23, and a driving member 27 connected to one end of the driving screw 25 through a clutch mechanism 26. The top surface of the support block 24 is V-shaped, and the lead angle of the driving screw 25 is greater than 40°. The slider 23 is provided with a through hole 28 for the driving screw 25 to pass through. The inner wall of the through hole 28 is provided with a plurality of ball grooves 29, and the ball grooves 29 are all rollingly connected with balls 30 connected to the threaded grooves on the driving screw 25.

[0038] An installation cavity 31 is provided inside the lifting block 7, and the driving member 27 includes a clutch shaft 32 rotatably connected to the inner side wall of the installation cavity 31 and coaxial with the driving screw 25, a transmission gear 33 fixedly connected to the clutch shaft 32, and a crown gear 34 rotatably connected to the bottom surface of the installation cavity 31 and meshing with the transmission gear 33. A spline shaft 35 arranged in a vertical direction is rotatably connected in the sliding groove 6, and a through hole 36 is provided on the lifting block 7 for the spline shaft 35 to pass through. The crown gear 34 is slidably connected to the spline shaft 35 and is circumferentially limited by the spline. The clutch shaft 32 is axially slidably connected to the side wall of the installation cavity 31 along the driving screw 25 and one end extends into the interior of the cross bar 4, and a clutch groove 37 is provided at the end of the driving screw 25.

[0039] The clutch mechanism 26 includes a fixed sleeve 38 fixedly connected to the end surface of the clutch shaft 32 and located in the clutch groove 37, a telescopic rod 39 slidably connected to the fixed sleeve 38, a support spring 40 arranged in the fixed sleeve 38 and abutting against the end of the telescopic rod 39, and a clutch member 41 uniformly distributed around the fixed sleeve 38. The clutch member 41 includes a first support rod 42 hinged at one end to the outer wall of the fixed sleeve 38, a second support rod 43 hinged at one end to the telescopic rod 39, and an abutting rod 44 hinged at both ends to the other ends of the first support rod 42 and the second support rod 43, respectively. The inner wall of the clutch groove 37 is provided with a clamping groove 45 uniformly distributed around the circumference thereof and matching with the abutting rod 44. One end of the clutch shaft 32 located in the cross bar 4 is fixedly connected to a limiting ring 46. When the limiting ring 46 abuts against the end surface of the driving screw 25, the abutting rod 44 is inserted into the clamping groove 45.

[0040] In order to make the separation and connection state between the clutch shaft 32 and the driving screw 25 more stable, the limit ring 46 is a magnetic ring, the end face of the driving screw 25 is fixedly connected with a first magnetic ring 47 extending circumferentially around the outer circumference of the clutch groove 37, and the outer wall of the lifting block 7 is fixedly connected with a second magnetic ring 48 corresponding to the inner part of the cross bar 4, the second magnetic ring 48 extends circumferentially around the clutch shaft 32, and the limit ring 46 is made of magnetic material. By arranging the first magnetic ring 47 and the second magnetic ring 48 on the end face of the driving screw 25 and the outer wall of the lifting block 7 respectively, the limit ring 46 can be adsorbed on the end face of the first magnetic ring 47 when the driving screw 25 and the clutch shaft 32 are connected, so that the connection state between the driving screw 25 and the clutch shaft 32 is more stable, and when the driving screw 25 and the clutch shaft 32 are separated, the limit ring 46 is adsorbed on the end face of the second magnetic ring 48, and the separation state between the driving screw 25 and the clutch shaft 32 is more stable.

[0041] An adjusting member 49 for driving the clutch shaft 32 to move is provided in the installation cavity 31. A connecting ring groove 50 is provided on the peripheral wall of the clutch shaft 32 located in the installation cavity 31. The adjusting member 49 includes a through groove 51 provided on the side wall of the lifting block 7 and connected to the installation cavity 31, and a driving plate 52 hinged at the through groove 51. The hinge axis of the driving plate 52 is vertically arranged. An extension groove 53 corresponding to the through groove 51 and extending in the vertical direction is provided on the side wall of the column 3. One end of the driving plate 52 extends to the outside of the column 3 through the extension groove 53. A pull rope 54 is connected to one end of the driving plate 52 located on the outside of the column 3. The other end of the driving plate 52 is U-shaped and clamped in the connecting ring groove 50.

[0042] The spline shaft 35 is located between the two lifting screws 9. The bottom end of the spline shaft 35 is fixedly connected to a first bevel gear 55 located above the worm 11. The inner side wall of the sliding groove 6 is rotatably connected to a horizontally arranged driving shaft 56. The end of the driving shaft 56 is fixedly connected to a second bevel gear 57 meshing with the first bevel gear 55. The other end of the driving shaft 56 extends to the outside of the column 3 and is provided with a second hexagonal groove 58.

[0043] A mounting groove 59 is provided on the top surface of the support block 24, and a first positioning plate 60 and a second positioning plate 61 are provided in the mounting groove 59. The first positioning plate 60 and the second positioning plate 61 are both semicircular and have cross sections facing upward. The axes of the first positioning plate 60 and the second positioning plate 61 are spaced apart in the length direction of the cross bar 4. Two support wheels 62 are provided on the top surfaces of the first positioning plate 60 and the second positioning plate 61. The two support wheels 62 are respectively located on both sides of the axis of the first positioning plate 60 or the second positioning plate 61, and the support wheel 62 on the top surface of the first positioning plate 60 close to the second positioning plate 61 is spaced apart from the support wheel 62 on the top surface of the second positioning plate 61 close to the first positioning plate 60.

[0044] The first positioning plate 60 and the second positioning block are respectively provided with a first connecting groove 63 and a second connecting groove 64 extending in an arc shape around the center of the circle, and the first connecting groove 63 and the second connecting groove 64 penetrate the first positioning plate 60 and the second positioning plate 61 axially, respectively, and the first connecting rod 65 and the second connecting rod 66 respectively penetrate the first connecting groove 63 and the second connecting groove 64 are fixedly connected in the mounting groove 59, and the first connecting rod 65 and the second connecting rod 66 are respectively slidably connected to the first connecting groove 63 and the second connecting groove 64, and the cross-sections of the first connecting rod 65 and the second connecting rod 66 are both arc-shaped plates matching the first connecting groove 63 and the second connecting groove 64, and the end of the first connecting groove 63 is provided with a return spring 67 abutting against the first connecting rod 65, and the end of the second connecting groove 64 is provided with a return spring 67 abutting against the second connecting rod 66. In order to increase the support area, the first positioning plate 60 and the second positioning plate 61 are each provided with a plurality of groups, and the plurality of first positioning plates 60 and the plurality of second positioning plates 61 are alternately arranged in the axial direction thereof.

[0045] By arranging a first positioning plate 60 and a second positioning plate 61 inside the support block 24, and respectively arranging two support wheels 62 on the top surfaces of the first positioning plate 60 and the second positioning plate 61, when the truss is placed on the top surface of the support block 24, the rod on the truss corresponds to the gap between the support wheels 62 close to the first positioning plate 60 and the second positioning plate 61. When the first positioning plate 60 and the second positioning plate 61 are acted upon by gravity, they can rotate under the limitation of the first connecting rod 65 and the second connecting rod 66, so that the support wheels 62 flip over. After flipping, the support wheels 62 on the first positioning plate 60 and the second positioning plate 61 that are far away from each other can also clamp the rod of the truss, thereby ensuring the stability of the truss and the truss can be flipped and adjusted.

[0046] In order to improve the application range of the first positioning plate 60 and the second positioning plate 61, a V-shaped groove 68 is provided at the center of the top surface of the first positioning plate 60 and the second positioning plate 61. By providing the V-shaped groove 68 on the top surface of the first positioning plate 60 and the second positioning plate 61, when the support block 24 needs to support the square rod, the two edges of the rod can be supported by the V-shaped groove 68, and the application range is wider.

[0047] The implementation principle of the present invention is: When the tire frame is supported, an electric tool is inserted into the first hexagonal groove 12, and the two lifting screws 9 are started to rotate through the cooperation of the worm gear 10 and the worm 11, thereby driving the lifting block 7 to move in the vertical direction, first lowering the cross bar 4 so that the staff can place the truss unit, and then synchronously raising the cross bars 4 on both sides to drive the truss unit to move to the specified height. At this time, if it is necessary to fine-tune the angle of the truss, the driving plate 52 is driven to swing through the pull rope 54, so that the clutch shaft 32 and the driving screw 25 are separated. At this time, the lifting cross bar 4 is driven The movable truss moves in the vertical direction. If the truss needs to be moved laterally, only the clutch shaft 32 and the driving screw 25 in the support assembly 1 on one side are separated, and inserted into the second hexagonal groove 58 through an electric tool, and the driving screw 25 in the cross bar 4 on the other side is driven to rotate through the spline shaft 35, thereby driving the truss to move laterally, and the other side of the truss can follow the movement. After the adjustment is completed, the driving screw 25 and the clutch shaft 32 are connected by pulling the pull ropes 54 on both sides, so that the driving screw 25 is fixed in its state to ensure the stability of the support block 24.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A steel truss assembly frame, comprising a plurality of support units arranged linearly, characterized in that: The support unit comprises two mutually symmetrical groups of support assemblies (1), wherein the support assemblies (1) comprise a base plate (2), a column (3) fixedly connected to the base plate (2), a crossbar (4) slidably connected to the column (3) in a vertical direction, and a positioning mechanism (5) arranged on the crossbar (4); The positioning mechanism (5) comprises a slide groove (22) provided on the top surface of the cross bar (4) and extending along the length direction thereof, a slider (23) slidably connected to the slide groove (22), a support block (24) fixedly connected to the top of the slider (23), a driving screw (25) rotatably supported at both ends of the slide groove (22) and threadedly connected to the slider (23), and a driving member (27) connected to one end of the driving screw (25) through a clutch mechanism (26). The top surface of the support block (24) is V-shaped, the lead angle of the driving screw (25) is greater than 40°, the slider (23) is provided with a through hole (28) for the driving screw (25) to pass through, the inner wall of the through hole (28) is provided with a plurality of ball grooves (29), and the ball grooves (29) are all rollingly connected with balls (30) connected to the threaded grooves on the driving screw (25).

2. The steel truss assembly frame according to claim 1, characterized in that: A sliding groove (6) extending in the vertical direction is provided on one side of the upright column (3), a lifting block (7) is slidably connected in the sliding groove (6), one end of the cross bar (4) is fixedly connected to the lifting block (7), a triangular support (8) is provided between the bottom of the cross bar (4) and the lifting block (7), a lifting screw (9) vertically arranged and threadedly connected to the lifting block (7) is rotatably connected in the sliding groove (6), and a mounting cavity (31) is provided inside the lifting block (7); The driving member (27) comprises a clutch shaft (32) rotatably connected to the inner wall of the installation cavity (31) and coaxial with the driving screw (25), a transmission gear (33) fixedly connected to the clutch shaft (32), and a crown gear (34) rotatably connected to the inner bottom surface of the installation cavity (31) and meshing with the transmission gear (33); a spline shaft (35) arranged in a vertical direction is rotatably connected in the sliding groove (6); a through hole (36) for the spline shaft (35) to pass through is provided on the lifting block (7); the crown gear (34) is slidably connected to the spline shaft (35) and circumferentially limited by a spline; the clutch shaft (32) is axially slidably connected to the side wall of the installation cavity (31) along the driving screw (25) and one end thereof extends into the interior of the cross bar (4); a clutch groove (37) is provided at the end of the driving screw (25); The clutch mechanism (26) comprises a fixed sleeve (38) fixedly connected to the end surface of the clutch shaft (32) and located in the clutch groove (37), a telescopic rod (39) slidably connected to the fixed sleeve (38), a support spring (40) arranged in the fixed sleeve (38) and abutting against the end of the telescopic rod (39), and a clutch member (41) uniformly distributed around the fixed sleeve (38), wherein the clutch member (41) comprises a first support rod (42) having one end hinged to the outer wall of the fixed sleeve (38), a second support rod (43) having one end hinged to the telescopic rod (39), and two support rods (44) hinged to the outer wall of the fixed sleeve (38). The ends of the two support rods (44) are respectively hinged to the other ends of the first support rod (42) and the second support rod (43); the inner wall of the clutch groove (37) is provided with snap-in grooves (45) evenly distributed around the circumference thereof and matched with the abutment rod (44); one end of the clutch shaft (32) located in the cross bar (4) is fixedly connected to a limiting ring (46); when the limiting ring (46) abuts against the end face of the driving screw (25), the abutment rod (44) is inserted into the snap-in groove (45); and an adjusting member (49) for driving the clutch shaft (32) to move is provided in the mounting cavity (31).

3. The steel truss assembly frame according to claim 2, characterized in that: The clutch shaft (32) is located in the installation cavity (31) and has a connecting ring groove (50) on its peripheral wall. The adjusting member (49) comprises a through groove (51) provided on the side wall of the lifting block (7) and connected to the installation cavity (31), and a driving plate (52) hinged at the through groove (51). The hinge axis of the driving plate (52) is vertically arranged. The side wall of the column (3) is provided with an extension groove (53) corresponding to the through groove (51) and extending in the vertical direction. One end of the driving plate (52) extends to the outside of the column (3) through the extension groove (53). One end of the driving plate (52) located on the outside of the column (3) is connected to a pull rope (54). The other end of the driving plate (52) is U-shaped and clamped in the connecting ring groove (50).

4. The steel truss assembly frame according to claim 2, characterized in that: The limiting ring (46) is a magnetic ring. The end surface of the driving screw (25) is fixedly connected with a first magnetic ring (47) extending circumferentially around the outer circumference of the clutch groove (37). The outer wall of the lifting block (7) is fixedly connected with a second magnetic ring (48) corresponding to the inner part of the cross bar (4). The second magnetic ring (48) extends circumferentially around the clutch shaft (32). The limiting ring (46) is made of magnetic material.

5. The steel truss assembly frame according to claim 2, characterized in that: The lifting screw (9) is provided with two groups, the spline shaft (35) is located between the two lifting screws (9), the bottom end of each lifting screw (9) is provided with a worm gear (10), the bottom of the sliding groove (6) is rotatably supported by a worm (11) respectively meshed with the worm gears (10) on both sides through an axle seat, one end of the worm (11) extends to the outside of the column (3) and is provided with a first hexagonal groove (12), the bottom end of the spline shaft (35) is fixedly connected with a first bevel gear (55) located above the worm (11), the inner side wall of the sliding groove (6) is rotatably connected with a horizontally arranged driving shaft (56), the end of the driving shaft (56) is fixedly connected with a second bevel gear (57) meshed with the first bevel gear (55), the other end of the driving shaft (56) extends to the outside of the column (3) and is provided with a second hexagonal groove (58).

6. The steel truss assembly frame according to claim 1, characterized in that: Guide wheels (13) are provided at the four corners of the side wall of the lifting block (7), and the rotation axis of the guide wheel (13) is parallel to the cross bar (4). Guide grooves (14) corresponding to the guide wheels (13) are provided at the four corners of the inner wall of the sliding groove (6). The guide wheel (13) rolls against the inner wall of the guide groove (14). Guide gears (15) are provided at both ends of the peripheral wall of the guide wheel (13). Two guide racks (16) respectively meshing with the guide gears (15) are fixedly connected to the inner wall of the guide groove (14) on one side close to the cross bar (4).

7. The steel truss assembly frame according to claim 6, characterized in that: The guide wheel (13) is provided with a plurality of elastic ratchets (17) at a portion between the guide gears (15) at both ends. The elastic ratchets (17) include a receiving groove (18) provided on the peripheral wall of the guide wheel (13), a ratchet (19) hinged at one end to the receiving groove (18), and a tension spring (20) connected between the receiving groove (18) and the ratchet (19). A ratchet bar (21) corresponding to the ratchet (19) is fixedly connected to the inner wall of the guide groove (14) on one side away from the cross bar (4), and the teeth of the ratchet bar (21) are inclined upward.

8. The steel truss assembly frame according to claim 1, characterized in that: The top surface of the support block (24) is provided with a mounting groove (59), and a first positioning plate (60) and a second positioning plate (61) are arranged in the mounting groove (59); the first positioning plate (60) and the second positioning plate (61) are both semicircular and have their cross-sections facing upward; the axes of the first positioning plate (60) and the second positioning plate (61) are spaced apart in the length direction of the cross bar (4); the top surfaces of the first positioning plate (60) and the second positioning plate (61) are both provided with two supporting wheels (62); the two supporting wheels (62) are respectively located on both sides of the axis of the first positioning plate (60) or the second positioning plate (61); and the supporting wheel (62) on the top surface of the first positioning plate (60) close to the second positioning plate (61) and the supporting wheel (62) on the top surface of the second positioning plate (61) close to the first positioning plate (60) are spaced apart; The first positioning plate (60) and the second positioning block are respectively provided with a first connecting groove (63) and a second connecting groove (64) extending in an arc shape around the center of the circle. The first connecting groove (63) and the second connecting groove (64) respectively penetrate the first positioning plate (60) and the second positioning plate (61) axially. A first connecting rod (65) and a second connecting rod (66) respectively penetrate the first connecting groove (63) and the second connecting groove (64) are fixedly connected in the mounting groove (59). The first connecting rod (65) and the second connecting rod (66) are respectively slidably connected to the first connecting groove (63) and the second connecting groove (64). The cross sections of the first connecting rod (65) and the second connecting rod (66) are both arc-shaped plates matching the first connecting groove (63) and the second connecting groove (64). A return spring (67) abutting against the first connecting rod (65) is provided at the end of the first connecting groove (63), and a return spring (67) abutting against the second connecting rod (66) is provided at the end of the second connecting groove (64).

9. The steel truss assembly frame according to claim 1, characterized in that: The first positioning plates (60) and the second positioning plates (61) are each provided with a plurality of groups, and the plurality of the first positioning plates (60) and the plurality of the second positioning plates (61) are arranged alternately in the axial direction thereof.

10. The steel truss assembly frame according to claim 1, characterized in that: A V-shaped groove (68) is provided at the center of the top surface of each of the first positioning plate (60) and the second positioning plate (61).

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