Adjustable supporting rod for building construction

Abstract

The invention relates to the technical field of building construction, in particular to an adjustable supporting rod for building construction, which comprises a supporting pipe, a supporting rod, a rotating seat, a limiting cylinder, a connecting cylinder, a first compression spring and the like. Wherein the connecting cylinder is configured to coaxially rotate under the driving of the rotating seat and push the supporting rod, so that the supporting rod moves upwards; when the supporting rod does not jack the borne object, the relative positions of the limiting cylinder and the connecting cylinder are not changed; after the supporting rod moves upwards in the axial direction to jack the supported object, the rotating base continues to rotate to drive the limiting cylinder to move upwards in the axial direction relative to the connecting cylinder, and the multiple jacking blocks stretch out of the limiting cylinder in the radial direction under the abutting pressure of the connecting cylinder and abut against the pipe wall of the supporting pipe. According to the scheme, the top block abuts against the pipe wall of the supporting pipe, the supporting rod is limited to the center position of the supporting pipe, and therefore the coaxiality of the supporting rod and the supporting pipe is improved, and the supporting strength is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to an adjustable support rod for building construction. Background Art

[0002] Adjustable support rods are commonly used auxiliary tools in the field of construction, usually including a fixed support tube and a support rod that is retractable relative to the support tube. The support rod is connected to a nut set at the top of the support tube, and the support rod is moved by rotating the nut using the spiral connection between the nut and the support rod.

[0003] However, the coaxiality between the support rod and the support tube is often not guaranteed. In particular, as the distance the support rod extends out of the support tube increases, the support rod is more likely to deviate from the axis of the support tube, which not only affects the support strength but also poses a safety hazard.

[0004] In addition, in order to ensure that the nut and the support rod can rotate relatively smoothly, a certain clearance is required between the nut and the support rod. However, the clearance between the nut and the support rod will cause the nut to move up and down when it is vibrated, which not only affects the overall support strength, but also further increases the construction risk. Summary of the invention

[0005] An object of the present invention is to improve the coaxiality of a support rod and a support tube in an adjustable support rod for construction, thereby improving the support strength.

[0006] Another object of the present invention is to improve the seismic performance of the adjustable support rod for construction and reduce the risk of movement of the rotating seat when subjected to vibration.

[0007] In particular, the present invention provides an adjustable support rod for construction, comprising: a support tube, the top end of which is open; a support rod, which extends into the support tube from the top end of the support tube; a rotating seat, which is sleeved on the support rod and threadedly connected to the support rod; the bottom end of the rotating seat abuts against the top end of the support tube, and the bottom of the rotating seat is provided with a positioning cylinder extending into the support tube; a limiting cylinder, which is fixedly mounted on the bottom of the positioning cylinder, and a plurality of radially movable top blocks are provided on the circumference of the limiting cylinder, and the wall surface of each top block facing the inside of the limiting cylinder is an inclined surface which gradually approaches the axis of the limiting cylinder from top to bottom; the inner side of the limiting cylinder is formed with an annular limiting end surface located above the top block; a connecting cylinder, which is provided between the positioning cylinder and the support rod The connecting tube is threadedly connected with the support rod; a limiting ring protruding outward is formed at the top of the connecting tube, and the bottom of the connecting tube is pressed against the inclined surface of the top block; a first compression spring is arranged between the limiting ring and the limiting end face, one end of which is pressed against the limiting end face, and the other end is pressed against the limiting ring; the connecting tube is configured to rotate coaxially under the drive of the rotating seat, and push the support rod to move the support rod upward; when the support rod has not yet supported the supported object, the relative positions of the limiting tube and the connecting tube remain unchanged; after the support rod moves axially upward to support the supported object, the rotating seat continues to rotate, driving the limiting tube to move axially upward relative to the connecting tube, so that multiple top blocks, under the pressure of the connecting tube, radially extend out of the limiting tube and abut against the tube wall of the support tube.

[0008] Furthermore, a plurality of radially penetrating through grooves are arranged on the circumference of the limiting cylinder, and a plurality of top blocks are arranged in the plurality of through grooves in a one-to-one correspondence; wherein a sliding groove is arranged on the side wall surface of each through groove, and a second compression spring is arranged in the sliding groove; a sliding block adapted to the sliding groove is arranged on the side wall of the top block, and the sliding block moves along the sliding groove toward the inside of the limiting cylinder under the pressure of the second compression spring.

[0009] Furthermore, a plurality of push blocks are circumferentially arranged on the outer wall surface of the bottom of the connecting tube, and the plurality of push blocks and the plurality of top blocks are arranged in one-to-one correspondence; the push blocks extend into the through grooves and abut against the top blocks; and the inclination angle of the wall surface where the push blocks abut against the top blocks is adapted to the inclined surface of the top block.

[0010] Furthermore, the plurality of top blocks are evenly distributed in the circumferential direction of the limiting cylinder.

[0011] Furthermore, a positioning ring is formed at the bottom end of the positioning cylinder, the limiting cylinder is sleeved on the positioning ring, and the side wall of the limiting cylinder is flush with the side wall surface of the positioning cylinder.

[0012] Furthermore, a plurality of first mounting holes are provided on the positioning ring, and a plurality of corresponding second mounting holes are provided on the limiting cylinder; a plurality of fasteners are provided on the limiting cylinder, and the plurality of fasteners correspond one-to-one to the plurality of second mounting holes; wherein each fastener passes through a second mounting hole and is connected to a corresponding first mounting hole to install the limiting cylinder and the positioning cylinder together.

[0013] Furthermore, a handle is provided on the rotating seat; and a support plate is provided on the top end of the supporting rod.

[0014] Optionally, the top block is made of elastic material.

[0015] Optionally, the top block is made of a rigid material, and an elastic band is sleeved on a region of the outer circumference of the limiting cylinder opposite to the top block.

[0016] Optionally, the thickness of the elastic band varies periodically in the circumferential direction, and the number of cycles of the thickness variation of the elastic band is consistent with the number of top blocks.

[0017] The beneficial effects of the present invention are: The adjustable support rod for construction of the present invention is provided with a plurality of top blocks on the circumference of the limit tube, and after the support rod supports the supported object, the limit tube moves upward in the axial direction relative to the connecting tube. Thus, by using the pressure of the connecting tube, the top block is extended out of the limit tube in the radial direction and abuts against the tube wall of the support tube. The plurality of top blocks extend out of the limit tube and abut against the tube wall of the support tube, thereby limiting the support rod at the center position of the support tube, improving the coaxiality of the support rod and the support tube, and further improving the support strength.

[0018] Furthermore, the adjustable support rod for construction of the present invention configures the top block as an elastic material, or arranges an elastic band outside the rigid top block, so that when the top block extends out of the limit tube, the top block or the elastic band can generate a large friction force with the tube wall of the support tube, thereby improving the coaxiality of the support rod and the support tube, improving the seismic resistance and reducing the risk of movement of the rotating seat when it is vibrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. In the accompanying drawings: Figure 1 is a schematic structural diagram of an adjustable support rod for building construction according to an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the decomposition of Figure 3 yes Figure 2 An exploded schematic diagram of the support rod, rotating seat, limiting cylinder and connecting cylinder in FIG. Figure 4 It is a structural schematic diagram of a rotating seat, a limiting cylinder and a connecting cylinder according to an embodiment of the present invention; Figure 5 is a schematic diagram of the partial structure of a limiting cylinder according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of another angle of an adjustable support rod for construction according to an embodiment of the present invention; Figure 7 is along Figure 6 A schematic cross-sectional view taken along the cutting line AA in FIG. Figure 8 yes Figure 7 A schematic enlarged view of the middle region D; Fig. 9 yes Figure 8 Schematic enlargement of the middle region E; Fig.10 yes Figure 8 Schematic enlargement of the middle region F; Fig.11 yes Figure 8 Schematic enlarged view of middle region G; Fig.12 yes Figure 8 A schematic structural diagram of the top block extending out of the limiting cylinder; Fig.13 yes Fig.12 Schematic enlargement of the middle region H; Fig.14 is a schematic structural diagram of an adjustable support rod for construction according to another embodiment of the present invention; Fig.15 is along Fig.14 A schematic cross-sectional view taken along the cutting line BB in FIG. Fig.16 yes Fig.15 Schematic enlargement of region I; Fig.17 is along Fig.14 A schematic cross-sectional view taken along the cutting line CC in FIG. in: 100, support tube; 200, support rod; 210, support plate; 300, rotating seat; 310, positioning cylinder; 320, positioning ring; 321, first mounting hole; 330, handle; 400, limiting cylinder; 410, top block; 411, inclined surface; 412, slider; 420, limiting end surface; 430, through groove; 431, slide groove; 432, second compression spring; 440, second mounting hole; 450, fastener; 500, connecting cylinder; 510, limiting ring; 520, push block; 600, first compression spring; 700, elastic band. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The terms "first" and "second" herein are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0022] It should be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] Refer to the following Figures 1 to 17 The adjustable support rod for building construction provided by the present invention is described.

[0025] like Figure 1-17 As shown, this embodiment first provides an adjustable support rod for building construction.

[0026] The adjustable support rod for construction can generally include: a support pipe 100 , a support rod 200 , a rotating seat 300 , a limiting cylinder 400 , a connecting cylinder 500 and a first compression spring 600 .

[0027] The top of the support tube 100 is open. The support rod 200 extends into the support tube 100 from the top of the support tube 100. The rotating seat 300 is sleeved on the support rod 200 and is threadedly connected to the support rod 200. The bottom end of the rotating seat 300 abuts against the top of the support tube 100, and the bottom of the rotating seat 300 is formed with a positioning cylinder 310 extending into the support tube 100. The limiting cylinder 400 is fixedly installed at the bottom of the positioning cylinder 310, and a plurality of radially movable top blocks 410 are arranged on the circumference of the limiting cylinder 400, and each top block 410 faces the inner wall of the limiting cylinder 400 as an inclined surface 411 gradually approaching the axis of the limiting cylinder 400 from top to bottom. The inner side of the limiting cylinder 400 is formed with an annular limiting end face 420 located above the top block 410. The connecting cylinder 500 is arranged between the positioning cylinder 310 and the support rod 200 and is threadedly connected to the support rod 200. The top of the connecting tube 500 is formed with a stop ring 510 protruding outward, and the bottom of the connecting tube 500 is pressed against the inclined surface 411 of the top block 410. The first compression spring 600 is arranged between the stop ring 510 and the stop end face 420, one end of which is pressed against the stop end face 420, and the other end of which is pressed against the stop ring 510. The connecting tube 500 is configured to rotate coaxially driven by the rotating seat 300, and push the support rod 200 to move the support rod 200 upward. When the support rod 200 has not yet supported the object being carried, the relative positions of the stop cylinder 400 and the connecting tube 500 remain unchanged. After the support rod 200 moves axially upward to support the supported object, the rotating seat 300 continues to rotate, driving the limiting cylinder 400 to move axially upward relative to the connecting cylinder 500, so that the multiple top blocks 410 extend radially out of the limiting cylinder 400 under the pressure of the connecting cylinder 500 and abut against the tube wall of the support tube 100.

[0028] Under the pressure of the first compression spring 600 , during the entire movement of the support rod 200 , the internal thread of the connecting tube 500 always abuts against the lower tooth side of the external thread of the support rod 200 .

[0029] When the support rod 200 has not moved to abut against the supported object, the internal thread of the rotating seat 300 abuts against the upper tooth side of the external thread of the support rod 200. When the rotating seat 300 rotates, it drives the connecting tube 500 to rotate coaxially. The connecting tube 500 pushes the support rod 200 through threaded engagement, so that the support rod 200 moves upward in the axial direction.

[0030] When the support rod 200 moves axially upward to support the supported object, the support rod 200 moves axially to the limit position where it cannot move upward any further. At this time, the rotating seat 300 continues to rotate, and the rotating seat 300 drives the limiting cylinder 400 to move axially upward relative to the support rod 200 and the connecting cylinder 500. The internal thread of the rotating seat 300 changes from abutting against the upper tooth side of the external thread of the support rod 200 to abutting against the lower tooth side of the external thread of the support rod 200. In other words, the limiting cylinder 400 moves axially relative to the connecting cylinder 500 by a distance equal to the gap between the internal thread and the external thread.

[0031] When the limiting tube 400 moves upward in the axial direction relative to the connecting tube 500 , the top block 410 extends out of the limiting tube 400 under the pressure of the connecting tube 500 and abuts against the tube wall of the supporting tube 100 .

[0032] In the solution of this embodiment, a plurality of top blocks 410 are arranged on the circumference of the limiting tube 400, so that after the support rod 200 supports the supported object, the top blocks 410 extend radially out of the limiting tube 400 under the pressure of the connecting tube 500 and abut against the tube wall of the support tube 100. Thus, the support rod 200 is limited to the center position of the support tube 100, the coaxiality of the support rod 200 and the support tube 100 is improved, which not only improves the supporting strength of the adjustable support rod for construction, but also reduces safety hazards.

[0033] Furthermore, after the top block 410 extends out of the limiting tube 400 and abuts against the tube wall of the support tube 100, a certain friction resistance will be generated between the top block 410 and the tube wall of the support tube 100, which to a certain extent alleviates the pressure on the end face of the top end of the support tube 100, thereby reducing the risk of deformation of the top end of the support tube 100.

[0034] In the solution of this embodiment, the support rod 200 extends from the top of the support tube 100, and the distance that the support rod 200 extends out of the support tube 100 can be adjusted according to the height of the supported object, which can adapt to different usage scenarios and is more practical.

[0035] The bottom of the rotating seat 300 is formed with a positioning cylinder 310 extending into the support tube 100, which not only reduces the risk of the rotating seat 300 falling off from the support tube 100, but also limits the relative position relationship between the rotating seat 300 and the support tube 100 to a certain extent, thereby improving the coaxiality between the support rod 200 passing through the rotating seat 300 and the support tube 100. In some embodiments, a positioning groove may be formed in the area where the bottom end of the rotating seat 300 and the tube wall of the support tube 100 are opposite. The top end of the support tube 100 is embedded in the positioning groove, further improving the overall structural stability of the adjustable support rod for construction.

[0036] The connecting tube 500 and the support rod 200 are threadedly connected, and the connecting tube 500 rotates coaxially under the drive of the rotating seat 300, thereby ensuring smooth rotation of the support rod 200 relative to the rotating seat 300 and the connecting tube 500. In some embodiments, the connecting tube 500 and the positioning tube 310 can be respectively provided with a stop block and a stop groove that cooperate with each other, so that when the rotating seat 300 rotates, the connecting tube 500 is driven to rotate coaxially.

[0037] In some preferred embodiments, the angle between the inclined surface 411 of the top block 410 and the horizontal plane can be set to be smaller, so that the limiting cylinder 400 only needs to move a smaller distance (less than or equal to the thread gap between the rotating seat 300 and the support rod 200) relative to the connecting cylinder 500, and the top block 410 can extend a sufficient distance in the radial direction, thereby ensuring that the top block 410 can smoothly abut against the tube wall of the support tube 100.

[0038] A plurality of radially penetrating through grooves 430 are arranged on the circumference of the limiting cylinder 400, and a plurality of top blocks 410 are arranged in the plurality of through grooves 430 in a one-to-one correspondence. A slide groove 431 is arranged on the side wall surface of each through groove 430, and a second compression spring 432 is arranged in the slide groove 431; a slider 412 adapted to the slide groove 431 is arranged on the side wall of the top block 410, and the slider 412 moves along the slide groove 431 toward the inside of the limiting cylinder 400 under the pressure of the second compression spring 432.

[0039] like Figure 4-5 As shown, a radially penetrating through groove 430 is provided on the circumference of the limiting cylinder 400, which ensures the smooth movement of the top block 410 in the radial direction. A sliding groove 431 is provided on the side of the through groove 430, and a second compression spring 432 is provided on the groove wall of the sliding groove 431 away from the axis of the limiting cylinder 400, and the wall surface of the slider 412 away from the axis of the limiting cylinder 400 is pressed against the second compression spring 432. In the process of adjusting the support rod 200, when the support rod 200 has not yet supported the carried object, the top block 410 can be retracted in the limiting cylinder 400 under the pressure of the second compression spring 432, thereby ensuring the smooth adjustment of the support rod 200.

[0040] In some embodiments, one end of the slide groove 431 close to the axis of the limiting cylinder 400 can penetrate the wall of the limiting cylinder 400, and a removable baffle can be arranged in the groove of the slide groove 431, which not only facilitates the installation and replacement of the top block 410, but also can limit the maximum moving range of the slider 412, thereby preventing the top block 410 from protruding from the inner wall surface of the limiting cylinder 400, thereby ensuring the normal adjustment of the support rod 200.

[0041] In some embodiments, a slide groove 431 may be provided on the groove wall on both sides of the through groove 430, and a second compression spring 432 is provided in each slide groove 431. A corresponding slider 412 is provided on both sides of the top block 410, and the two sliders 412 are respectively inserted into the corresponding slide groove 431. Under the joint pressure of the two second compression springs 432, the pressure applied to the top block 410 is more uniform, so that the top block 410 moves more smoothly along the through groove 430.

[0042] like Figure 4-5 As shown, in some embodiments, the limiting cylinder 400 may be composed of two half rings spliced ​​together to reduce the difficulty of assembly.

[0043] A plurality of push blocks 520 are arranged along the circumferential direction on the outer wall surface of the bottom of the connecting tube 500, and the plurality of push blocks 520 and the plurality of top blocks 410 are arranged one by one. The push blocks 520 extend into the through slots 430 and abut against the top blocks 410; and the inclination angle of the wall surface where the push blocks 520 abut against the top blocks 410 is adapted to the inclined surface 411 of the top blocks 410.

[0044] In the solution of this embodiment, a push block 520 corresponding to the top block 410 is arranged on the outer wall surface of the connecting tube 500, and the wall surface of the push block 520 is arranged to match the inclined surface 411 of the top block 410, so that the top block 410 moves more smoothly under the push of the push block 520. At the same time, the risk of wear of the top block 410 and the connecting tube 500 is reduced.

[0045] like Figure 8 As shown, in some embodiments, the structure of the push block 520 can be adapted to the through groove 430, and the push block 520 extends into the through groove 430. The side wall surface of the push block 520 abuts against the groove wall of the through groove 430, so that when the rotating seat 300 drives the limiting cylinder 400 to rotate, it can drive the connecting cylinder 500 to rotate synchronously, thereby realizing the coaxial rotation of the rotating seat 300 and the connecting cylinder 500.

[0046] like Figure 8 As shown, the lower the position of the connecting tube 500 relative to the limiting tube 400 in the axial direction, the greater the distance that the top block 410 is pressed and extends out of the limiting tube 400. Therefore, in the process of assembling the support rod 200, the rotating seat 300 and the connecting tube 500 together, the number of pitches between the connecting tube 500 and the rotating seat 300 can be manually adjusted by the assembler so that the distance that the top block 410 extends out of the limiting tube 400 is adapted to the diameter of the support tube 100.

[0047] In some preferred embodiments, the plurality of top blocks 410 are evenly distributed in the circumferential direction of the limiting cylinder 400. When the top blocks 410 abut against the tube wall of the support tube 100, the force applied to the tube wall of the support tube 100 is more evenly distributed, thereby further improving the coaxiality of the support rod 200 and the support tube 100, and reducing the deformation risk of the top end of the support tube 100. Accordingly, the plurality of slide grooves 431 and the plurality of push blocks 520 corresponding to the plurality of top blocks 410 are also evenly distributed in the circumferential direction.

[0048] In other embodiments, the push block 520 is not provided at the bottom of the connecting cylinder 500. The size of the top block 410 can be set larger so that the bottom end of the connecting cylinder 500 can directly abut against the inclined surface 411 of the top block 410, thereby pushing the top block 410 to move. A positioning ring 320 is formed at the bottom end of the positioning cylinder 310, and the limiting cylinder 400 is sleeved on the positioning ring 320, and the side wall of the limiting cylinder 400 is flush with the side wall surface of the positioning cylinder 310.

[0049] In the solution of this embodiment, by setting a positioning ring 320 at the bottom end of the positioning cylinder 310, the limiting cylinder 400 is sleeved on the positioning ring 320, thereby reducing the difficulty of positioning and installing the limiting cylinder 400. The side wall surface of the limiting cylinder 400 is set to be flush with the side wall surface of the positioning cylinder 310, which improves the rationality and stability of the structure.

[0050] A plurality of first mounting holes 321 are provided on the positioning ring 320, and a plurality of corresponding second mounting holes 440 are provided on the limiting cylinder 400; a plurality of fasteners 450 are provided on the limiting cylinder 400, and the plurality of fasteners 450 correspond one-to-one to the plurality of second mounting holes 440; wherein each fastener 450 passes through a second mounting hole 440 and is connected to a corresponding first mounting hole 321, so as to install the limiting cylinder 400 and the positioning cylinder 310 together.

[0051] The solution of this embodiment is to set a plurality of first mounting holes 321 on the positioning ring 320, set a corresponding plurality of second mounting holes 440 on the limiting cylinder 400, and use fasteners 450 to fix the limiting cylinder 400 and the positioning cylinder 310 together, which is not only convenient to install but also has a tight connection.

[0052] In some embodiments, the first mounting hole 321 and the second mounting hole 440 may be threaded holes, and the fastener 450 may be a bolt. In other embodiments, the first mounting hole 321 and the second mounting hole 440 may be through holes, and the fastener 450 may include a bolt and a corresponding nut. In still other embodiments, the fastener 450 may be a rivet.

[0053] In some preferred embodiments, the plurality of first mounting holes 321 are evenly distributed in the circumferential direction of the positioning ring 320 , thereby improving the connection tightness and structural stability between the positioning ring 320 and the limiting cylinder 400 .

[0054] A handle 330 is provided on the rotating seat 300 ; a support plate 210 is provided at the top end of the supporting rod 200 .

[0055] The solution of this embodiment is to provide a handle 330 on the rotating seat 300, and to increase the torque by using the handle 330, so that the rotation of the rotating seat 300 is easier and more labor-saving, and the difficulty of adjusting the support rod 200 is reduced. In some preferred embodiments, two handles 330 can be symmetrically provided on the rotating seat 300 to further reduce the difficulty of rotation.

[0056] Furthermore, in the solution of this embodiment, a support plate 210 is provided at the top end of the support rod 200, and the support plate 210 is used to support the carried object, so that the structure is more stable.

[0057] like Figure 1-3 As shown, the support plate 210 may include a horizontal bottom plate and side plates disposed obliquely on both sides of the bottom plate. The bottom plate increases the effective contact area between the support rod 200 and the object being carried, thereby reducing the local pressure at the end of the support rod 200 and reducing the risk of deformation of the end of the support rod 200. The side plates can limit the object being carried, reduce the risk of the object being carried sliding from the side, and improve the structural stability.

[0058] In some embodiments, the top block 410 is made of an elastic material.

[0059] The top block 410 is made of elastic material, which increases the friction resistance when the top block 410 abuts against the tube wall of the support tube 100, and the top block 410 is not easy to be displaced. It not only improves the coaxiality of the support rod 200 and the support tube 100, improves the support strength, but also improves the seismic performance of the adjustable support rod for construction, reduces the risk of movement of the rotating seat 300 when it is vibrated, and further reduces the construction risk.

[0060] In some preferred embodiments, the top block 410 may be made of nylon material, which has high strength and good toughness, and also has good wear resistance and corrosion resistance.

[0061] like Figure 14-17 As shown, in other embodiments, the top block 410 is made of a rigid material, and an elastic band 700 is sleeved on the outer circumference of the limiting cylinder 400 and the area opposite to the top block 410 .

[0062] By arranging an elastic band 700 on the outer periphery of the limiting cylinder 400, when the top block 410 is pressed out of the limiting cylinder 400, the elastic band 700 can be compressed so that the elastic band 700 is tightly attached to the wall of the supporting tube 100, thereby increasing the friction resistance between the top block 410 and the supporting tube 100, thereby improving the seismic performance of the adjustable support rod for construction and reducing the risk of movement of the rotating seat 300 when subjected to vibration.

[0063] In some preferred embodiments, the elastic band 700 can be made of nylon material. For example, the elastic band 700 can be configured as a nylon rope.

[0064] like Fig.17 As shown, in some embodiments, the thickness of the elastic band 700 varies periodically in the circumferential direction, and the number of periods of thickness variation of the elastic band 700 is consistent with the number of top blocks 410 .

[0065] The thickness of the elastic band 700 changes periodically in the circumferential direction, and the number of the changing cycles is the same as the number of the top block 410. Therefore, the thickness of the elastic band 700 corresponding to the top block 410 can be adjusted by rotating the elastic band 700, thereby changing the maximum distance that the elastic band 700 can press when the top block 410 extends out of the limiting cylinder 400, so as to adapt to the support tube 100 of different diameters.

[0066] The solution of this embodiment is to make the top block 410 extend out of the limiting tube 400 only when the support rod 200 starts to support the carried object, thereby ensuring that the normal adjustment of the support rod 200 is time-saving and labor-saving, and at the same time ensuring that after the support rod 200 is adjusted to the required position, the support rod 200 has sufficient frictional anti-loosening force.

[0067] The specific working process of the adjustable support rod for construction provided by the present invention is described in combination with the above embodiments: Under the pressure of the first compression spring 600, the internal thread of the connecting tube 500 and the lower tooth side of the external thread of the supporting rod 200 are pressed. The rotating seat 300 is rotated, and the rotating seat 300 drives the connecting tube 500 to rotate coaxially. When the connecting tube 500 rotates, it pushes the supporting rod 200, so that the supporting rod 200 moves upward along the axial direction relative to the supporting tube 100.

[0068] When the support rod 200 moves up to support the supported object, the support rod 200 stops moving. Before this, the internal thread of the rotating seat 300 is always pressed against the upper tooth side of the external thread of the support rod 200 under the pressure of the first compression spring 600. Therefore, after the support rod 200 stops moving, the rotating seat 300 continues to rotate, and the rotating seat 300 can move up relative to the connecting tube 500 by a distance of the gap between the internal thread and the external thread. That is, the connecting tube 500 moves axially downward relative to the limiting tube 400, thereby pushing the top block 410 out of the limiting tube 400, so that the top block 410 abuts against the tube wall of the support tube 100, thereby ensuring the coaxiality of the support rod 200 and the support tube 100.

[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An adjustable support rod for construction, characterized in that: include: a support tube having an open top end; A support rod extending from the top end of the support tube into the support tube; A rotating seat is sleeved on the support rod and threadedly connected to the support rod; the bottom end of the rotating seat abuts against the top end of the support tube, and a positioning cylinder extending into the support tube is provided at the bottom of the rotating seat; The limiting cylinder is fixedly mounted on the bottom of the positioning cylinder, and a plurality of radially movable top blocks are arranged on the circumference of the limiting cylinder, and the wall surface of each top block facing the inside of the limiting cylinder is an inclined surface gradually approaching the axis of the limiting cylinder from top to bottom; the inner side of the limiting cylinder is formed with an annular limiting end surface located above the top block; A connecting tube is arranged between the positioning tube and the supporting rod and is threadedly connected to the supporting rod; a limiting ring protruding outward is formed at the top of the connecting tube, and the bottom of the connecting tube is pressed against the inclined surface of the top block; A first compression spring, arranged between the limiting ring and the limiting end surface, with one end pressing against the limiting end surface and the other end pressing against the limiting ring; The connecting tube is configured to coaxially rotate under the drive of the rotating seat and push the supporting rod to move the supporting rod upward; When the support rod has not yet supported the supported object, the relative positions of the limiting cylinder and the connecting cylinder remain unchanged; after the support rod moves axially upward to support the supported object, the rotating seat continues to rotate, driving the limiting cylinder to move axially upward relative to the connecting cylinder, so that the multiple top blocks extend radially out of the limiting cylinder under the pressure of the connecting cylinder and abut against the tube wall of the support tube.

2. The adjustable support rod for construction according to claim 1, characterized in that: The limiting cylinder is provided with a plurality of radially penetrating through grooves on its circumference, and the plurality of top blocks are arranged in the plurality of through grooves in a one-to-one correspondence; wherein, A slide groove is arranged on the side wall surface of each through groove, and a second compression spring is arranged in the slide groove; A sliding block adapted to the sliding groove is arranged on the side wall of the top block. The sliding block moves along the sliding groove toward the inside of the limiting cylinder under the pressure of the second compression spring.

3. The adjustable support rod for construction according to claim 2, characterized in that: A plurality of push blocks are arranged on the outer wall surface of the bottom of the connecting tube along the circumferential direction, and the plurality of push blocks and the plurality of top blocks are arranged in one-to-one correspondence; The push block extends into the through slot and abuts against the top block; and the inclination angle of the wall surface where the push block abuts against the top block is matched with the inclined surface of the top block.

4. The adjustable support rod for construction according to claim 1, characterized in that: The plurality of top blocks are evenly distributed in the circumferential direction of the limiting cylinder.

5. The adjustable support rod for construction according to claim 1, characterized in that: A positioning ring is formed at the bottom end of the positioning cylinder, the limiting cylinder is sleeved on the positioning ring, and the side wall of the limiting cylinder is flush with the side wall surface of the positioning cylinder.

6. The adjustable support rod for construction according to claim 5, characterized in that: The positioning ring is provided with a plurality of first mounting holes, and the limiting cylinder is provided with a plurality of corresponding second mounting holes; A plurality of fasteners are arranged on the limiting cylinder, and the plurality of fasteners correspond one-to-one to the plurality of the second mounting holes; wherein each of the fasteners passes through a second mounting hole and is connected to a corresponding first mounting hole to install the limiting cylinder and the positioning cylinder together.

7. The adjustable support rod for construction according to claim 1, characterized in that: The rotating seat is provided with a handle; A supporting plate is arranged on the top end of the supporting rod.

8. The adjustable support rod for construction according to claim 1, characterized in that: The top block is made of elastic material.

9. The adjustable support rod for construction according to claim 1, characterized in that: The top block is made of a rigid material, and an elastic band is sleeved on a region of the outer circumference of the limiting cylinder opposite to the top block.

10. The adjustable support rod for construction according to claim 9, characterized in that: The thickness of the elastic band varies periodically in the circumferential direction, and the number of cycles of the thickness variation of the elastic band is consistent with the number of the top blocks.

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