Adjustable support rod for construction

Abstract

This invention relates to the field of building construction technology, and specifically provides an adjustable support rod for building construction, comprising: a support tube, a support rod, a rotating seat, a limiting cylinder, a connecting cylinder, and a first compression spring, etc. The connecting cylinder is configured to rotate coaxially under the drive of the rotating seat, pushing the support rod upwards. Before the support rod supports the load, the relative positions of the limiting cylinder and the connecting cylinder remain unchanged. After the support rod moves axially upwards to support the load, the rotating seat continues to rotate, causing the limiting cylinder to move axially upwards relative to the connecting cylinder, so that multiple top blocks, under the pressure of the connecting cylinder, extend radially out of the limiting cylinder and abut against the wall of the support tube. This invention utilizes the abutment of the top blocks against the wall of the support tube to confine the support rod to the center position of the support tube, thereby improving the coaxiality of the support rod and the support tube, and thus improving the support strength.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to an adjustable strut for building construction. Background Technology

[0002] Adjustable struts are common auxiliary tools in the construction industry, typically consisting of a fixed support tube and a retractable support rod relative to the support tube. The support rod connects to a nut at the top of the support tube; by rotating the nut and the support rod through their helical connection, the support rod can be moved.

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

[0004] Furthermore, a certain clearance is required between the nut and the support rod to ensure relatively smooth rotation. However, this clearance can cause the nut to wobble when subjected to vibration, affecting not only the overall support strength but also increasing construction risks. Summary of the Invention

[0005] One objective of this invention is to improve the coaxiality of the support rod and support tube in an adjustable strut for building construction, thereby increasing the support strength.

[0006] Another objective of this invention is to improve the seismic performance of adjustable struts used in building construction and reduce the risk of swaying of the rotating seat when subjected to vibration.

[0007] Specifically, the present invention provides an adjustable strut for building construction, comprising: a support tube with an open top; a support rod extending into the support tube from the top; a rotating seat fitted onto the support rod and threadedly connected to it; the bottom end of the rotating seat abutting against the top end of the support tube, and a positioning cylinder extending into the support tube being provided at the bottom of the rotating seat; a limiting cylinder fixedly installed at the bottom of the positioning cylinder, and a plurality of radially movable top blocks being provided circumferentially on the limiting cylinder, each top block having an inclined surface facing the inner wall of the limiting cylinder that gradually approaches the axis of the limiting cylinder from top to bottom; an annular limiting end face being formed on the inner side of the limiting cylinder above the top blocks; and a connecting cylinder disposed between the positioning cylinder and the support rod. Between them, it is threadedly connected to the support rod; the top of the connecting cylinder has an outwardly protruding limiting ring, and the bottom of the connecting cylinder abuts against the inclined surface of the top block; a first compression spring is set between the limiting ring and the limiting end face, with one end abutting against the limiting end face and the other end abutting against the limiting ring; the connecting cylinder is configured to rotate coaxially under the drive of the rotating seat and push the support rod, causing the support rod to move upward; when the support rod has not yet supported the load, the relative position of the limiting cylinder and the connecting cylinder remains unchanged; after the support rod moves upward axially to support the load, the rotating seat continues to rotate, driving the limiting cylinder to move upward axially relative to the connecting cylinder, so that multiple top blocks extend radially out of the limiting cylinder under the pressure of the connecting cylinder and abut against the pipe wall of the support tube.

[0008] Furthermore, the limiting cylinder is provided with multiple radially penetrating through slots in its circumferential direction, and multiple top blocks are respectively arranged in the multiple through slots; wherein, each through slot has a sliding groove on its side wall, and a second compression spring is provided in the sliding groove; a slider adapted to the sliding groove is provided on the side wall of the top block, and the slider moves along the sliding groove into the interior of the limiting cylinder under the pressure of the second compression spring.

[0009] Furthermore, multiple push blocks are arranged circumferentially on the outer wall surface at the bottom of the connecting cylinder, and multiple push blocks and multiple top blocks are arranged in a one-to-one correspondence; the push blocks extend into the through groove 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 inclination surface of the top blocks.

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

[0011] Furthermore, a positioning ring is formed at the bottom 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, the positioning ring is provided with multiple first mounting holes, and the limiting cylinder is provided with multiple corresponding second mounting holes; the limiting cylinder is provided with multiple fasteners, and the multiple fasteners correspond one-to-one with the multiple second mounting holes; wherein, each fastener passes through a second mounting hole and is connected to a corresponding first mounting hole, so as to install the limiting cylinder and the positioning cylinder together.

[0013] Furthermore, a handle is provided on the rotating base; a support plate is provided at the top of the support rod.

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

[0015] Optionally, the top block is made of a rigid material, and an elastic band is fitted around the outer periphery 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 periods of change in the elastic band thickness is consistent with the number of top blocks.

[0017] The beneficial effects of this invention are:

[0018] The adjustable support rod for building construction of this invention features multiple top blocks arranged circumferentially on a limiting cylinder. After the support rod supports the object being supported, the limiting cylinder moves axially upward relative to the connecting cylinder. The pressure from the connecting cylinder causes the top blocks to extend radially out of the limiting cylinder and abut against the wall of the support tube. The multiple top blocks extending from the limiting cylinder and abutting against the wall of the support tube confine the support rod to the center position of the support tube, improving the coaxiality of the support rod and the support tube, thereby increasing the support strength.

[0019] Furthermore, the adjustable strut for building construction of the present invention, by configuring the top block as an elastic material, or by providing an elastic band over a rigid top block, allows the top block or elastic band to generate a large frictional force between the top block or the wall of the support tube when the top block extends out of the limiting cylinder. This improves the coaxiality of the support rod and the support tube, enhances seismic performance, and reduces the risk of the rotating seat shifting under vibration. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings:

[0021] Figure 1 This is a structural schematic diagram of an adjustable strut for building construction according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0023] Figure 3 yes Figure 2 An exploded view of the support rod, rotating seat, limiting cylinder, and connecting cylinder in the diagram;

[0024] Figure 4 This is a schematic diagram of the rotating seat, limiting cylinder, and connecting cylinder according to an embodiment of the present invention;

[0025] Figure 5This is a partial structural schematic diagram of a limiting cylinder according to an embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram of an adjustable strut for building construction according to an embodiment of the present invention at another angle.

[0027] Figure 7 It is along Figure 6 A schematic cross-sectional view taken by the cutting line AA in the diagram;

[0028] Figure 8 yes Figure 7 A schematic enlarged view of region D in the middle;

[0029] Figure 9 yes Figure 8 A schematic enlarged view of region E in the middle;

[0030] Figure 10 yes Figure 8 A schematic enlarged view of the central region F;

[0031] Figure 11 yes Figure 8 A schematic enlarged view of region G in the middle;

[0032] Figure 12 yes Figure 8 A schematic structural diagram of the top block extending out of the limiting cylinder;

[0033] Figure 13 yes Figure 12 A schematic enlarged view of region H in the middle;

[0034] Figure 14 This is a schematic diagram of the structure of an adjustable strut for building construction according to another embodiment of the present invention;

[0035] Figure 15 It is along Figure 14 A schematic cross-sectional view taken by the cutting line BB in the diagram;

[0036] Figure 16 yes Figure 15 A schematic enlarged view of region I in the middle;

[0037] Figure 17 It is along Figure 14 A schematic cross-sectional view cut off by the section line CC;

[0038] in:

[0039] 100, Support tube; 200, Support rod; 210, Support plate; 300, Rotary 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 face; 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 Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be 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 merely illustrative of the invention and are not intended to limit the invention.

[0041] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0042] It should be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] The following reference Figures 1 to 17This invention describes an adjustable strut for building construction.

[0045] like Figure 1-17 As shown in the figure, this embodiment first provides an adjustable strut for building construction.

[0046] Adjustable struts for building construction generally include: a support tube 100, a support rod 200, a swivel seat 300, a limiting cylinder 400, a connecting cylinder 500, and a first compression spring 600.

[0047] The top end of the support tube 100 is open. A support rod 200 extends into the support tube 100 from its top end. A rotating seat 300 is fitted onto the support rod 200 and threadedly connected to it. The bottom end of the rotating seat 300 abuts against the top end of the support tube 100, and a positioning cylinder 310 extending into the support tube 100 is formed at the bottom of the rotating seat 300. A limiting cylinder 400 is fixedly installed at the bottom of the positioning cylinder 310, and multiple radially movable top blocks 410 are arranged circumferentially on the limiting cylinder 400. Each top block 410 has an inclined surface 411 facing the inner wall of the limiting cylinder 400, gradually approaching the axis of the limiting cylinder 400 from top to bottom. An annular limiting end face 420 is formed on the inner side of the limiting cylinder 400, located above the top blocks 410. A connecting cylinder 500 is disposed between the positioning cylinder 310 and the support rod 200 and threadedly connected to it. A limiting ring 510 protruding outward is formed at the top of the connecting cylinder 500, and the bottom of the connecting cylinder 500 abuts against the inclined surface 411 of the top block 410. A first compression spring 600 is disposed between the limiting ring 510 and the limiting end face 420, with one end abutting against the limiting end face 420 and the other end abutting against the limiting ring 510. The connecting cylinder 500 is configured to rotate coaxially under the drive of the rotating seat 300, and push the support rod 200, causing the support rod 200 to move upward. When the support rod 200 has not yet supported the load, the relative position of the limiting cylinder 400 and the connecting cylinder 500 remains unchanged. After the support rod 200 moves upward along the axial direction to support the object, the rotating seat 300 continues to rotate, causing the limiting cylinder 400 to move upward along the axial direction relative to the connecting cylinder 500, so that multiple top blocks 410 extend radially out of the limiting cylinder 400 under the pressure of the connecting cylinder 500 and abut against the pipe wall of the support pipe 100.

[0048] Under the pressure of the first compression spring 600, during the entire movement of the support rod 200, the internal thread of the connecting cylinder 500 always abuts against the lower tooth side of the external thread of the support rod 200.

[0049] Before the support rod 200 moves to contact the object being supported, the internal thread of the rotating seat 300 and the upper tooth side of the external thread of the support rod 200 abut against each other. When the rotating seat 300 rotates, it drives the connecting cylinder 500 to rotate coaxially. The connecting cylinder 500 pushes the support rod 200 through the threaded engagement, causing the support rod 200 to move upward axially.

[0050] When the support rod 200 moves axially upward to support the object it is carrying, that is, when the support rod 200 moves to its limit position in the axial direction and can no longer move upward, the rotating seat 300 continues to rotate. 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 a state of abutting the upper tooth side of the external thread of the support rod 200 to a state of abutting the lower tooth side of the external thread of the support rod 200. In other words, the limiting cylinder 400 moves axially upward relative to the connecting cylinder 500 by the distance of the gap between the internal and external threads.

[0051] As the limiting cylinder 400 moves axially upward relative to the connecting cylinder 500, the top block 410 extends out of the limiting cylinder 400 under the pressure of the connecting cylinder 500 and abuts against the wall of the support pipe 100.

[0052] In this embodiment, multiple top blocks 410 are arranged circumferentially on the limiting cylinder 400. After the support rod 200 supports the object, the top blocks 410 extend radially out of the limiting cylinder 400 under the pressure of the connecting cylinder 500 and abut against the wall of the support pipe 100. This confines the support rod 200 to the center position of the support pipe 100, improving the coaxiality of the support rod 200 and the support pipe 100. This not only improves the support strength of the adjustable strut used in building construction but also reduces safety hazards.

[0053] Furthermore, after the top block 410 extends out of the limiting cylinder 400 and abuts against the wall of the support tube 100, a certain frictional resistance will be generated between the top block 410 and the wall of the support tube 100, which will alleviate the pressure on the end face of the top of the support tube 100 to a certain extent, thereby reducing the risk of deformation of the top of the support tube 100.

[0054] In this embodiment, the support rod 200 extends from the top of the support tube 100, and the distance by which the support rod 200 extends out of the support tube 100 can be adjusted according to the height of the object being supported, thus adapting to different usage scenarios and making it more practical.

[0055] The bottom of the rotating base 300 has a positioning cylinder 310 that extends into the support tube 100. This not only reduces the risk of the rotating base 300 falling out of the support tube 100, but also limits the relative positional relationship between the rotating base 300 and the support tube 100 to a certain extent, thereby improving the coaxiality between the support rod 200 passing through the rotating base 300 and the support tube 100. In some embodiments, a positioning groove can be formed in the area where the bottom end of the rotating base 300 faces the wall of the support tube 100. The top end of the support tube 100 is embedded in the positioning groove, further improving the overall structural stability of the adjustable strut used in building construction.

[0056] The connecting cylinder 500 and the support rod 200 are threadedly connected, and the connecting cylinder 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 cylinder 500. In some embodiments, the connecting cylinder 500 and the positioning cylinder 310 may be respectively provided with mutually cooperating limiting blocks and limiting grooves, so that when the rotating seat 300 rotates, it drives the connecting cylinder 500 to rotate coaxially.

[0057] 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 small, so that the limiting cylinder 400 only needs to move a small distance relative to the connecting cylinder 500 (less than or equal to the threaded gap between the rotating seat 300 and the support rod 200) for the top block 410 to extend a sufficient distance radially, thereby ensuring that the top block 410 can smoothly abut against the wall of the support tube 100.

[0058] The limiting cylinder 400 has multiple radially penetrating through slots 430 arranged circumferentially, and multiple top blocks 410 are correspondingly arranged in the multiple through slots 430. Each through slot 430 has a sliding groove 431 on its side wall, and a second compression spring 432 is arranged in the sliding groove 431. The side wall of the top block 410 is provided with a slider 412 adapted to the sliding groove 431. Under the pressure of the second compression spring 432, the slider 412 moves along the sliding groove 431 into the interior of the limiting cylinder 400.

[0059] like Figure 4-5 As shown, the limiting cylinder 400 has a radially penetrating through groove 430 in its circumferential direction, ensuring 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. 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. The wall surface of the slider 412 away from the axis of the limiting cylinder 400 abuts against the second compression spring 432. This allows the top block 410 to retract into the limiting cylinder 400 under the pressure of the second compression spring 432 during the adjustment of the support rod 200, before the support rod 200 supports the load, thus ensuring smooth adjustment of the support rod 200.

[0060] In some embodiments, one end of the slide groove 431 near the axis of the limiting cylinder 400 can penetrate the cylinder wall of the limiting cylinder 400, and a removable baffle can be provided in the groove of the slide groove 431, which not only facilitates the installation and replacement of the top block 410, but also limits the maximum movement range of the slider 412, preventing the top block 410 from protruding from the inner wall surface of the limiting cylinder 400, and ensuring the normal adjustment of the support rod 200.

[0061] In some embodiments, a sliding groove 431 may be provided on each side of the groove wall of the through groove 430, and a second compression spring 432 may be provided in each sliding groove 431. A corresponding slider 412 is provided on each side of the top block 410, and the two sliders 412 are respectively engaged in the corresponding sliding grooves 431. Under the joint pressure of the two second compression springs 432, the pressure on the top block 410 is more uniform, making the top block 410 move more smoothly along the through groove 430.

[0062] like Figure 4-5 As shown, in some embodiments, the limiting cylinder 400 may consist of two semi-rings joined together to reduce assembly difficulty.

[0063] Multiple push blocks 520 are arranged circumferentially on the outer wall surface of the bottom of the connecting cylinder 500, and the multiple push blocks 520 and multiple top blocks 410 are arranged in a one-to-one correspondence. The push blocks 520 extend into the through groove 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 inclination surface 411 of the top blocks 410.

[0064] In this embodiment, a pusher 520 corresponding to the top block 410 is provided on the outer wall of the connecting cylinder 500, and the wall surface of the pusher 520 is adapted to the inclined surface 411 of the top block 410, so that the top block 410 moves more smoothly under the push of the pusher 520. At the same time, the wear risk of the top block 410 and the connecting cylinder 500 is reduced.

[0065] like Figure 8 As shown, in some embodiments, the structure of the push block 520 can be adapted to the through groove 430. The push block 520 extends into the through groove 430, and the side wall 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.

[0066] like Figure 8 As shown, the lower the connecting cylinder 500 is relative to the limiting cylinder 400 in the axial direction, the greater the distance the top block 410 is pressed out of the limiting cylinder 400. Therefore, during the assembly of the support rod 200, the rotating seat 300, and the connecting cylinder 500, the assembly personnel can manually adjust the number of thread pitches between the connecting cylinder 500 and the rotating seat 300 to ensure that the distance the top block 410 extends out of the limiting cylinder 400 matches the diameter of the support tube 100.

[0067] In some preferred embodiments, multiple top blocks 410 are evenly distributed circumferentially around the limiting cylinder 400. This results in a more uniform distribution of force applied to the wall of the support tube 100 when the top blocks 410 abut against it, thereby further improving the coaxiality of the support rod 200 and the support tube 100, while reducing the risk of deformation at the top of the support tube 100. Correspondingly, multiple sliding grooves 431 and multiple push blocks 520 corresponding to the multiple top blocks 410 are also evenly distributed circumferentially.

[0068] In some embodiments, the bottom of the connecting cylinder 500 does not have a push block 520. The size of the top block 410 can be set relatively large 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. The bottom end of the positioning cylinder 310 forms a positioning ring 320, 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.

[0069] In this embodiment, a positioning ring 320 is provided at the bottom end of the positioning cylinder 310, allowing the limiting cylinder 400 to be fitted onto the positioning ring 320, thereby reducing the difficulty of positioning and installing the limiting cylinder 400. Setting the side wall of the limiting cylinder 400 flush with the side wall of the positioning cylinder 310 improves structural rationality and stability.

[0070] The positioning ring 320 is provided with a plurality of first mounting holes 321, and the limiting cylinder 400 is provided with a plurality of corresponding second mounting holes 440; the limiting cylinder 400 is provided with a plurality of fasteners 450, and the plurality of fasteners 450 correspond one-to-one with 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.

[0071] In this embodiment, by providing multiple first mounting holes 321 on the positioning ring 320 and multiple corresponding second mounting holes 440 on the limiting cylinder 400, the limiting cylinder 400 and the positioning cylinder 310 are fixedly installed together using fasteners 450. This not only makes installation convenient but also ensures a tight connection.

[0072] 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.

[0073] In some preferred embodiments, a 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.

[0074] A handle 330 is provided on the rotating base 300; a support plate 210 is provided at the top of the support rod 200.

[0075] In this embodiment, by providing a handle 330 on the rotating base 300, the torque is increased using the handle 330, making the rotation of the rotating base 300 easier and less strenuous, thus reducing the difficulty of adjusting the support rod 200. In some preferred embodiments, two handles 330 may be symmetrically provided on the rotating base 300 to further reduce the difficulty of rotation.

[0076] Furthermore, in this embodiment, a support plate 210 is provided at the top of the support rod 200 to support the load, making the structure more stable.

[0077] like Figure 1-3 As shown, the support plate 210 may include a horizontal base plate and inclined side plates located on both sides of the base plate. The base plate increases the effective contact area between the support rod 200 and the supported object, thereby reducing the local pressure at the end of the support rod 200 and minimizing the risk of deformation at the end of the support rod 200. The side plates can limit the supported object, reducing the risk of the supported object slipping off the side and improving structural stability.

[0078] In some embodiments, the top block 410 is made of an elastic material.

[0079] The top block 410 is made of elastic material, which increases the frictional resistance when the top block 410 abuts against the wall of the support pipe 100. The top block 410 is less likely to be displaced, which not only improves the coaxiality of the support rod 200 and the support pipe 100 and improves the support strength, but also improves the seismic performance of the adjustable strut used in building construction, reduces the risk of the rotating seat 300 moving when subjected to vibration, and further reduces the construction risk.

[0080] In some preferred embodiments, the top block 410 may be made of nylon material, which is not only strong and tough, but also has good wear resistance and corrosion resistance.

[0081] like Figure 14-17 As shown, in some other embodiments, the top block 410 is made of a rigid material, and an elastic band 700 is fitted around the outer periphery of the limiting cylinder 400 opposite to the top block 410.

[0082] By setting 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 pressed tightly, so that the elastic band 700 is pressed against the pipe wall of the support pipe 100, thereby increasing the frictional resistance between the top block 410 and the support pipe 100, thereby improving the seismic performance of the adjustable strut used in building construction and reducing the risk of the rotating seat 300 moving when subjected to vibration.

[0083] In some preferred embodiments, the elastic band 700 may be made of nylon material. For example, the elastic band 700 may be configured as a nylon rope.

[0084] like Figure 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.

[0085] The thickness of the elastic band 700 changes periodically in the circumferential direction, and the number of cycles is the same as the number of top blocks 410. Therefore, by rotating the elastic band 700, the thickness of the elastic band 700 corresponding to the top block 410 can be adjusted, 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 support pipes 100 with different diameters.

[0086] In this embodiment, the top block 410 extends out of the limiting cylinder 400 only when the support rod 200 begins to support the load. This ensures that the normal adjustment of the support rod 200 is time-saving and labor-saving, and at the same time ensures that the support rod 200 has sufficient frictional anti-loosening force after it is adjusted to the required position.

[0087] The specific working process of the adjustable strut for building construction provided by the present invention will be described in conjunction with the above embodiments:

[0088] Under the pressure of the first compression spring 600, the lower teeth of the internal thread of the connecting cylinder 500 and the external thread of the support rod 200 abut against each other. Rotating the rotating seat 300 causes the connecting cylinder 500 to rotate coaxially. When the connecting cylinder 500 rotates, it pushes the support rod 200, causing the support rod 200 to move axially upward relative to the support tube 100.

[0089] When the support rod 200 moves upward to support the object being supported, the support rod 200 stops moving. Before this, the internal thread of the rotating seat 300, under the pressure of the first compression spring 600, is always pressed against the upper tooth side of the external thread of the support rod 200. Therefore, after the support rod 200 stops moving, the rotating seat 300 continues to rotate, and the rotating seat 300 can move upward relative to the connecting cylinder 500 by a distance equal to the gap between the internal and external threads. That is, the connecting cylinder 500 moves axially downward relative to the limiting cylinder 400, thereby pushing the top block 410 out of the limiting cylinder 400, so that the top block 410 abuts against the wall of the support tube 100, thus ensuring the coaxiality of the support rod 200 and the support tube 100.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An adjustable strut for building construction, characterized in that, include: The support tube has an open top. A support rod extends into the support tube from the top end of the support tube, and a support plate is provided at the top end of the support rod. A rotating seat is fitted onto a 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 installed at the bottom of the positioning cylinder, and multiple top blocks that can move radially are provided on the circumference of the limiting cylinder. The wall surface of each top block facing the inside of the limiting cylinder is an inclined surface that gradually approaches the axis of the limiting cylinder from top to bottom; an annular limiting end face is formed on the inner side of the limiting cylinder above the top block. A connecting cylinder is positioned between the positioning cylinder and the support rod and is threadedly connected to the support rod; a limiting ring protruding outward is formed at the top of the connecting cylinder, and the bottom of the connecting cylinder abuts against the inclined surface of the top block; The first compression spring is set between the limiting ring and the limiting end face. One end abuts against the limiting end face, and the other end abuts against the limiting ring. During the entire movement of the support rod, the internal thread of the connecting cylinder always abuts against the lower tooth side of the external thread of the support rod, and the internal thread of the rotating seat abuts against the upper tooth side of the external thread of the support rod. The limiting cylinder has multiple radially penetrating through slots in its circumferential direction, and multiple top blocks are correspondingly arranged in the multiple through slots; multiple push blocks are arranged in the circumferential direction on the outer wall surface of the bottom of the connecting cylinder, and multiple push blocks and multiple top blocks are correspondingly arranged; the push blocks extend into the through slots and abut against the top blocks; and the inclination angle of the wall surface where the push block abuts against the top block is adapted to the inclination surface of the top block. The connecting cylinder is configured to rotate coaxially under the drive of the rotating seat, and push the support rod, causing the support rod to move upward; Before the support rod supports the object, the relative positions of the limiting cylinder and the connecting cylinder remain unchanged. After the support rod moves upward axially to support the object, it stops moving in the axial direction. The rotating seat continues to rotate, causing the limiting cylinder to move upward axially relative to the connecting cylinder. The internal thread of the rotating seat changes from abutting the upper tooth side of the external thread of the support rod to abutting the lower tooth side of the external thread of the support rod. This causes the connecting cylinder to move downward axially relative to the limiting cylinder by a distance equal to the gap between the internal and external threads. This pushes multiple top blocks radially out of the limiting cylinder, causing the top blocks to abut against the wall of the support tube.

2. The adjustable strut for building construction according to claim 1, characterized in that, in, Each through slot has a sliding groove on its side wall, and a second compression spring is installed inside the sliding groove; The top block has a slider that matches the slide groove on its side wall. Under the pressure of the second compression spring, the slider moves along the slide groove into the limiting cylinder.

3. The adjustable strut for building construction according to claim 1, characterized in that, Multiple top blocks are evenly distributed around the circumference of the limiting cylinder.

4. The adjustable strut for building construction according to claim 1, characterized in that, A positioning ring is formed at the bottom of the positioning cylinder, and a limiting cylinder is sleeved on the positioning ring, with the side wall of the limiting cylinder flush with the side wall of the positioning cylinder.

5. The adjustable strut for building construction according to claim 4, characterized in that, The positioning ring is provided with multiple first mounting holes, and the limiting cylinder is provided with multiple corresponding second mounting holes; The limiting cylinder is provided with multiple fasteners, each of which corresponds to a number of second mounting holes; each fastener passes through a second mounting hole and connects to a corresponding first mounting hole to install the limiting cylinder and the positioning cylinder together.

6. The adjustable strut for building construction according to claim 1, characterized in that, A handle is provided on the rotating base.

7. The adjustable strut for building construction according to claim 1, characterized in that, The top block is made of elastic material.

8. The adjustable strut for building construction according to claim 1, characterized in that, The top block is made of rigid material, and an elastic band is fitted around the outer periphery of the limiting cylinder opposite to the top block.

9. The adjustable strut for building construction according to claim 8, characterized in that, The thickness of the elastic band varies periodically in the circumferential direction, and the number of periods of change in the elastic band thickness is the same as the number of top blocks.

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