Mechanical connection tightening mechanism

Abstract

The invention relates to the technical field of reinforcing steel bar connection machinery, in particular to a mechanical connection tightening mechanism which comprises a fixing seat, a U-shaped placing seat is fixedly connected to the top of the fixing seat, a centering type fixing assembly is arranged on the U-shaped placing seat and comprises two sets of V-shaped clamping blocks, and self-tightening type clamping assemblies are arranged on the two sides of the top of the fixing seat. The self-tightening clamping assembly comprises an upper mounting seat and a lower mounting seat; according to the invention, according to the cooperation of the self-tightening clamping assembly and the centering fixing assembly, the reinforcing steel bars and the reinforcing steel bar sleeve are respectively subjected to centering clamping type fixation and automatic calibration treatment before butt joint, and then the reinforcing steel bars are subjected to self-tightening clamping rotation by virtue of the opposite rotation of the two groups of spline shafts, so that the synchronous connection of the two groups of reinforcing steel bars and the reinforcing steel bar sleeve is completed; and compared with a connection mode of one-by-one connection and multiple times of repeated calibration operation, the connection efficiency of the steel bars can be further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar connection machinery, and particularly to a mechanical connection tightening mechanism. Background Art

[0002] Steel bars, with their excellent high-strength characteristics, outstanding ductility, and high construction convenience, play a crucial role in the field of construction engineering and are widely used in many engineering projects such as bridges, tunnels, subways, and roads. Especially in some special structures with complex configurations and strict requirements, such as large bridges and subway construction, the connection of steel bars becomes a key task. Usually, multiple steel bars are precisely screwed and connected with special steel bar sleeves to ensure the stability and reliability of the connection part;

[0003] To further improve construction efficiency and ensure the consistency of connection quality, steel bar connection devices are often introduced to assist in the connection of steel bars, which can effectively avoid quality fluctuations caused by manual tightening and provide strong guarantees for the overall quality and safety of engineering projects.

[0004] For example, a steel bar rapid rotation connection device with the publication number of CN110883276A in the prior art. Although this device can achieve the threaded connection between steel bars and steel bar sleeves and solve the problem of non-standard tightening torque, when connecting, it needs to combine with external fixing equipment. First, fix the steel bar sleeve, then clamp a group of steel bars, and manually align and calibrate the two to complete the connection between the steel bar sleeve and the steel bar. Then, the external fixing equipment needs to fix the connected steel bars again and repeat the same operation above to complete the connection between two groups of steel bars and the steel bar sleeve. Therefore, this connection process is relatively complex and difficult to achieve the rapid connection and processing of two groups of steel bars and the matching steel bar sleeves.

[0005] In view of the above technical defects, a solution is proposed herein. Summary of the Invention

[0006] The purpose of the present invention is to provide a mechanical connection tightening mechanism to solve the above-mentioned technical defects.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A mechanical connection tightening mechanism includes a fixed seat, on which a frame is welded, and an elevating plate is installed on the frame through an electric push rod. The top of the fixed seat is fixedly connected with a U-shaped placement seat, and a centering fixed component is arranged on the U-shaped placement seat. The centering fixed component includes two groups of V-shaped clamping blocks, and an L-shaped auxiliary plate for driving the corresponding V-shaped clamping blocks to move is fixedly connected to the elevating plate;

[0008] Self-tightening clamping assemblies are arranged on both sides of the top of the fixing seat, and the self-tightening clamping assemblies include an upper mounting seat and a lower mounting seat, and a semicircular rotating cylinder is rotatably mounted on the opposite side of the upper mounting seat and the lower mounting seat, and a plurality of anti-slip clamping blocks are installed on the inner side wall of the semicircular rotating cylinder.

[0009] Preferably, receiving grooves adapted to the V-shaped clamping block are opened on the inner walls on both sides of the U-shaped placement seat, and the V-shaped clamping block is fixedly connected to a threaded tube that slides with the U-shaped placement seat, and the threaded tube is threadedly connected to a threaded rod, and the threaded rod is rotatably connected to a pushing rod that cooperates with the L-shaped auxiliary plate.

[0010] Preferably, an auxiliary rod sliding with the U-shaped placement seat and the V-shaped clamping block is fixedly connected to the push rod, and a return spring is fixedly connected between the push rod and the U-shaped placement seat and located on the outside of the auxiliary rod.

[0011] Preferably, the top of the upper mounting seat is fixedly connected to a sliding seat via a plurality of telescopic sleeves, and an auxiliary clamping spring is fixedly connected between the sliding seat and the upper mounting seat and on the outside of the telescopic sleeves, and the sliding seat is slidably connected to the lifting plate.

[0012] Preferably, support plates are symmetrically welded on both sides of the top of the fixed seat, a sliding rod sliding with the lower mounting seat is fixedly connected between the support plate and the U-shaped placement seat, and a spline shaft is rotatably connected, the lower mounting seat is rotatably connected to a shaft sleeve matching the spline shaft, and the shaft sleeve is fixedly connected to a driving gear, and a semicircular gear ring matching the driving gear is fixedly connected to the semicircular rotating cylinder.

[0013] Preferably, one end of the spline shaft passes through the interior of the U-shaped placement seat and is fixedly connected to a bevel gear 1, a rotating shaft is installed inside the U-shaped placement seat, and a bevel gear 2 meshing with two sets of bevel gears 1 is rotatably connected to the rotating shaft, and a motor for driving the corresponding spline shaft to rotate is bolted to the support plate on one side.

[0014] Preferably, a screw rod is rotatably connected between the support plate and the U-shaped placement seat, and a push plate that slides with the sliding rod is threadedly connected to the screw rod, a resistance spring is fixedly connected between the push plate and the lower mounting seat and located on the outside of the sliding rod, and pulleys are fixedly connected to the spline shaft and the screw rod, and the pulleys are connected by belt transmission.

[0015] Preferably, a plurality of trapezoidal fixing blocks cooperating with corresponding anti-slip clamping blocks are fixedly connected to the inner wall of the semicircular rotating drum, and the anti-slip clamping blocks are slidably connected to the inclined surface of the trapezoidal fixing blocks through convex sliding blocks, and a clamping tension spring is fixedly connected between the convex sliding block and the trapezoidal fixing block.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1) In the present invention, by means of the movement of the lifting plate, first, the two semi-cylindrical rotating cylinders on both sides of the U-shaped placing seat are combined to form a complete cylindrical rotating cylinder, and the anti-slip clamping blocks inside are used to perform centering clamping and fixing treatment on the two steel bars. Then, two V-shaped clamping blocks are pushed to clamp the steel bar sleeve on the U-shaped placing seat, and the steel bar sleeve is coaxially arranged with the steel bars on both sides, realizing automatic calibration treatment before butt joint. By means of the reverse rotation of the two spline shafts, first, the threaded ends of the steel bars on both sides are in flexible contact with the steel bar sleeve, and then the cylindrical rotating cylinder drives the steel bars to rotate, synchronously completing the threaded connection of the two steel bars and the steel bar sleeve. Compared with the prior art method of calibrating and then connecting the steel bars to the steel bar sleeve one by one, the connection efficiency of the steel bars can be further improved.

[0018] (2) In the present invention, through the sliding of the anti-slip clamping block on the inclined surface of the trapezoidal fixing block and the combined action of the tensile elastic force of the corresponding clamping tension spring on the anti-slip clamping block, not only the centering clamping of steel bars with different diameters is realized, but also during the rotation of the cylindrical rotating cylinder, the anti-slip clamping block can automatically clamp the steel bar, ensuring the rotation of the steel bar driven, and thus improving the connection stability with the steel bar sleeve. In addition, by adjusting the initial position between the push rod and the V-shaped clamping block, the centering clamping of steel bar sleeves with different diameters is realized, and thus the connection of steel bars with different diameters and the matching steel bar sleeves is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present invention with reference to the drawings;

[0020] Figure 1 is the structural schematic diagram of the present invention;

[0021] Figure 2 is the structural schematic diagram of the lifting plate of the present invention;

[0022] Figure 3 is the structural schematic diagram of the fixing seat of the present invention;

[0023] Figure 4 is the installation schematic diagram of the self-tightening clamping assembly of the present invention;

[0024] Figure 5 is the structural schematic diagram of the centering fixing assembly of the present invention;

[0025] Figure 6 is the structural schematic diagram of the lower mounting seat of the present invention;

[0026] Figure 7 is the structural schematic diagram of the semi-cylindrical rotating cylinder of the present invention;

[0027] Figure 8 is the structural schematic diagram of the anti-slip clamping block of the present invention;

[0028] Figure 9 is the cooperation schematic diagram of the two semi-cylindrical rotating cylinders of the present invention.

[0029] Legend:

[0030] 1. Fixed seat; 11. Frame; 12. Electric push rod; 13. Lifting plate; 14. U-shaped placement seat; 15. Support plate; 16. Sliding rod; 17. Spline shaft; 18. Bevel gear 1; 19. Bevel gear 2; 110. Motor; 111. Screw rod; 112. Push plate; 113. Resistance spring;

[0031] 2. Centering fixing assembly; 21. V-shaped clamp block; 22. L-shaped auxiliary plate; 23. Threaded pipe; 24. Threaded rod; 25. Push rod; 26. Auxiliary rod; 27. Return spring;

[0032] 3. Self-tightening clamping assembly; 31. Upper mounting seat; 32. Lower mounting seat; 33. Semicircular rotating drum; 34. Anti-slip clamping block; 35. Sliding seat; 36. Auxiliary clamping spring; 37. Driving gear; 38. Semicircular gear ring; 39. Trapezoidal fixing block; 310. Clamping tension spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 - 9 As shown, the connection process in the prior art is relatively complicated and it is difficult to quickly connect two sets of steel bars with the matching steel bar sleeves. This can be solved by the following solution:

[0035] A mechanical connection tightening mechanism in this embodiment includes a fixed seat 1, a frame 11 is welded on the fixed seat 1, and a lifting plate 13 is installed on the frame 11 through an electric push rod 12, and guide rods slidably connected to the frame 11 are symmetrically fixedly connected on both sides of the top of the lifting plate 13 to increase the stability of the lifting plate 13 during the lifting process, and a U-shaped placement seat 14 is fixedly connected to the top of the fixed seat 1, and a steel sleeve is placed in the U-shaped groove at the top of the U-shaped placement seat 14;

[0036] Moreover, a centering type fixing component 2 is arranged on the U-shaped placing seat 14 for centering and clamping different sizes of steel bar sleeves placed thereon. The centering type fixing component 2 includes two groups of V-shaped clamping blocks 21. One side of the V-shaped clamping block 21 is provided with a V-shaped groove. The two groups of V-shaped clamping blocks 21 move relatively, and the combined V-shaped grooves guide and lift the steel bar sleeve in the U-shaped groove to complete the centering clamping and fixing of the steel bar sleeve. Moreover, anti-slip lines are engraved on the V-shaped groove to further improve the clamping and fixing effect on the steel bar sleeve. An L-shaped auxiliary plate 22 for driving the corresponding V-shaped clamping block 21 to move is fixedly connected to the lifting plate 13.

[0037] Self-tightening clamping components 3 are arranged on both sides of the top of the fixed seat 1 for centering and clamping two steel bars adapted to the steel bar sleeve, so as to make the steel bar sleeve and the two steel bars coaxial, realize the automatic calibration process before butt joint, and further improve the convenience in the steel bar connection process. The self-tightening clamping component 3 includes an upper mounting seat 31 and a lower mounting seat 32. Semi-cylindrical rotating cylinders 33 are rotatably mounted on the opposite sides of the upper mounting seat 31 and the lower mounting seat 32;

[0038] After the two semi-cylindrical rotating cylinders 33 are in contact with each other, a complete cylindrical rotating cylinder is formed. Symmetrically fixed on the annular outer wall of the semi-cylindrical rotating cylinder 33 are semi-circular convex sliding rails. Sliding grooves adapted to the corresponding semi-circular convex sliding rails are opened on the upper mounting seat 31 and the lower mounting seat 32 for the stable rotation of the cylindrical rotating cylinder between the upper mounting seat 31 and the lower mounting seat 32, so as to drive the fixed steel bar to rotate centrically;

[0039] Symmetrically opened on both sides of the bottom of the semi-cylindrical rotating cylinder 33 located above are slots, and symmetrically fixed on both sides of the top of the semi-cylindrical rotating cylinder 33 located below are inserting blocks. The inserting blocks are adapted to the corresponding slots, so that while the lower mounting seat 32 drives the lower semi-cylindrical rotating cylinder 33 to move horizontally, the upper semi-cylindrical rotating cylinder 33 moves synchronously, ensuring the clamping and fixing of the steel bar and avoiding the problem that the cylindrical rotating cylinder cannot rotate due to the misalignment and fitting of the two, thus unable to realize the steel bar connection;

[0040] A number of anti-slip clamping blocks 34 are installed on the inner side wall of the semi-cylindrical rotating cylinder 33. One side of the anti-slip clamping block 34 is provided with an arc surface, and anti-slip edges are provided on the arc surface, which can further increase the contact friction force between the anti-slip clamping block 34 and the steel bar. Place the two steel bars to be connected with the steel bar sleeve in the lower semi-cylindrical rotating cylinders 33 on both sides, support the steel bars by the multiple anti-slip clamping blocks 34 in the lower semi-cylindrical rotating cylinders 33, and the electric push rod 12 drives the lifting plate 13 to move downward;

[0041] The lifting plate 13 combines with the auxiliary clamping spring 36 to carry out a downward movement of the semi-circular rotating cylinders 33 mounted on the upper mounting seats 31 on both sides. First, the semi-circular rotating cylinders 33 on both sides of the U-shaped placing seat 14 form a complete cylindrical rotating cylinder. Moreover, the slot at the bottom of the upper semi-circular rotating cylinder 33 is engaged with the insertion block at the top of the lower semi-circular rotating cylinder 33, completing the anti-offset contact of the two groups of semi-circular rotating cylinders 33.

[0042] Receiving grooves adapted to the V-shaped clamping blocks 21 are provided on the inner walls on both sides of the U-shaped placing seat 14, avoiding the problem that the V-shaped clamping blocks 21 occupy too much space in the U-shaped groove, thus making it inconvenient to place large-sized reinforcing bar sleeves. A threaded tube 23 slidable with the U-shaped placing seat 14 is fixedly connected to the V-shaped clamping block 21, and a threaded rod 24 is threadedly connected to the threaded tube 23. A push rod 25 rotatably connected to the L-shaped auxiliary plate 22 is provided on the threaded rod 24;

[0043] After the upper semi-circular rotating cylinder 33 contacts the lower semi-circular rotating cylinder 33, with the continuous downward movement of the lifting plate 13, the inclined sections on the two groups of L-shaped auxiliary plates 22 contact the corresponding push rods 25, guiding the push rods 25 to drive the V-shaped clamping blocks 21 to move in combination with the threaded tube 23 and the threaded rod 24. Until the vertical sections on the L-shaped auxiliary plates 22 contact the push rods 25, the centering clamping fixation of the reinforcing bar sleeve is completed.

[0044] An auxiliary rod 26 slidable with the U-shaped placing seat 14 and the V-shaped clamping block 21 is fixedly connected to the push rod 25, which is used to further increase the stability of the push rod 25 during the movement process. A return spring 27 is fixedly connected between the push rod 25 and the U-shaped placing seat 14 and on the outer side of the auxiliary rod 26. When the push rod 25 drives the V-shaped clamping block 21 to move, the return spring 27 is compressed. After the L-shaped auxiliary plate 22 rises and separates from the push rod 25, the push rod 25 and the V-shaped clamping block 21 perform a reset movement under the compression of the return spring 27, facilitating the removal of the reinforcing bar sleeve connected with the reinforcing bar.

[0045] The top of the upper mounting seat 31 is fixedly connected with a sliding seat 35 through a plurality of telescopic sleeve rods. A linear slide rail slidably connected with the sliding seat 35 is installed at the bottom of the lifting plate 13, which is used to limit the moving direction of the sliding seat 35. An installation block is fixedly connected to the center of the bottom of the lifting plate 13. A damper is installed between the installation block and the corresponding sliding seat 35, which is used to ensure the fixation of the position of the sliding seat 35 during the lifting process of the lifting plate 13, so that after the lifting plate 13 descends, the anti-offset contact of the two groups of semi-circular rotating cylinders 33 can be achieved. In addition, guiding inclined surfaces can be provided at both ends of the top of the insertion block to further assist the docking effect of the two groups of semi-circular rotating cylinders;

[0046] Moreover, an auxiliary clamping spring 36 is fixedly connected between the sliding seat 35 and the upper mounting seat 31 and located outside the telescopic sleeve rod. The sliding seat 35 is slidably connected to the lifting plate 13. By providing the telescopic sleeve rod and the auxiliary clamping spring 36 between the sliding seat 35 and the upper mounting seat 31, when the lifting plate 13 descends, the two semi-cylindrical rotating cylinders 33 are brought into contact first, and the flexible pre-clamping of the steel bars is completed first.

[0047] It is convenient to push the steel bar to move according to the placement position of the steel bar sleeve on the U-shaped placement seat 14, and further adjust the distance between the steel bars on both sides and the steel bar sleeve, avoiding the problem that the steel bar sleeve contacts one side of the steel bar first for thread connection, resulting in the continuous rotation interference of the other side of the steel bar. Then, when the telescopic rod completely enters the telescopic sleeve, through the resistance of the telescopic sleeve against the upper mounting seat 31, the two semi-cylindrical rotating cylinders 33 are rigidly resisted against each other.

[0048] On both sides of the top of the fixed seat 1, support plates 15 are symmetrically welded. A sliding rod 16 that slides with the lower mounting seat 32 is fixedly connected between the support plates 15 and the U-shaped placement seat 14, increasing the horizontal sliding stability of the lower mounting seat 32. And a spline shaft 17 is rotatably connected. A sleeve adapted to the spline shaft 17 is rotatably connected to the lower mounting seat 32, and a driving gear 37 is fixedly connected to the sleeve. A semi-circular gear ring 38 adapted to the driving gear 37 is fixedly connected to the semi-cylindrical rotating cylinder 33.

[0049] By providing the spline shaft 17 and the sleeve, while the driving gear 37 rotates, it will not interfere with the horizontal movement of the driving gear 37. Then, through the meshing of the driving gear 37 and the semi-circular gear ring 38, the cylindrical rotating cylinder is driven to rotate, realizing the rotation of the fixed steel bar.

[0050] One end of the spline shaft 17 penetrates into the interior of the U-shaped placement seat 14 and is fixedly connected with a first bevel gear 18. A rotating shaft is installed inside the U-shaped placement seat 14, and a second bevel gear 19 meshing with the two first bevel gears 18 is rotatably connected to the rotating shaft. A motor 110 for driving the corresponding spline shaft 17 to rotate is bolted to one side support plate 15.

[0051] The motor 110 drives the corresponding spline shaft 17 to rotate. The other spline shaft 17 rotates in the opposite direction through the meshing of the first bevel gear 18 and the second bevel gear 19. The spline shaft 17 is combined with the adapted sleeve, and the meshing of the driving gear 37 and the semi-circular gear ring 38 causes the cylindrical rotating cylinders on both sides of the U-shaped placement seat 14 to rotate in the opposite direction, resulting in the reverse rotation of the two steel bars, thereby realizing the synchronous connection process of the two steel bars and the steel bar sleeve to improve the connection efficiency.

[0052] A screw rod 111 is rotatably connected between the support plate 15 and the U-shaped placement seat 14, and a push plate 112 that slides with the slide bar 16 is threadedly connected to the screw rod 111, and a resisting spring 113 is fixedly connected between the push plate 112 and the lower mounting seat 32 and located on the outside of the slide bar 16, and pulleys are fixedly connected to the spline shaft 17 and the screw rod 111, and the pulleys are connected through a belt transmission;

[0053] While the two sets of spline shafts 17 rotate, the screw rod 111 is driven to rotate through the pulley and the belt. The rotating screw rod 111 drives the corresponding push plate 112 to move close to the U-shaped placement seat 14. The push plate 112 combines with the resistance spring 113 to push the cylindrical drum carrying the centering clamped steel bar to move, causing the threaded end of the steel bar to flexibly resist the steel bar sleeve, and combined with the rotation of the steel bar carried by the cylindrical drum, the threaded connection of the two sets of steel bars and the steel bar sleeve is synchronously completed.

[0054] Example 2: Please refer to Figure 5 , Figures 7 - 9 As shown, the following solutions can be used to solve the problem of difficulty in connecting steel bars of different sizes and reducing the scope of use of the mechanism;

[0055] In this embodiment, the inner walls of both sides of the U-shaped placement seat 14 are provided with receiving grooves adapted to the V-shaped clamping block 21, and the V-shaped clamping block 21 is fixedly connected with a threaded tube 23 that slides with the U-shaped placement seat 14, and the threaded tube 23 is threadedly connected with a threaded rod 24, and the threaded rod 24 is rotatably connected with a push rod 25 that cooperates with the L-shaped auxiliary plate 22;

[0056] A clearance opening is provided on one side of the push rod 25, one end of the threaded rod 24 passes through the clearance opening and is installed with a knob. The threaded rod 24 is driven to rotate by turning the knob, and the threaded tube 23 is cooperated to adjust the distance between the push plate 112 and the V-shaped clamp 21, so as to center and clamp steel sleeves of different diameters. The clearance opening can prevent the knob from contacting the L-shaped auxiliary plate 22, thereby increasing the wear problem of the L-shaped auxiliary plate 22.

[0057] A plurality of trapezoidal fixing blocks 39 matching corresponding anti-skid clamping blocks 34 are fixedly connected to the inner wall of the semicircular rotating drum 33. The anti-skid clamping blocks 34 are slidably connected to the oblique surfaces of the trapezoidal fixing blocks 39 through convex sliders, and a clamping tension spring 310 is fixedly connected between the convex slider and the trapezoidal fixing blocks 39.

[0058] After the upper semi-circular rotating cylinder 33 contacts the lower semi-circular rotating cylinder 33, through a number of anti-slip clamping blocks 34 inside the two, and combined with the tensile elastic force of the corresponding clamping spring 310, the centering clamping and fixing of the steel bar is contacted and completed, and through the sliding of the anti-slip clamping block 34 on the trapezoidal fixing block 39, the cylindrical rotating cylinder is prompted to perform centering clamping on steel bars of different diameters. In addition, during the rotation process, combined with the sliding of the anti-slip clamping block 34 on the inclined surface of the trapezoidal fixing block 39, the anti-slip clamping block 34 is prompted to clamp the steel bar autonomously, ensuring the rotation of the driven steel bar, thereby improving the connection stability with the steel bar sleeve.

[0059] Embodiment 3: Please refer to Figures 1 - 9 As shown, the present invention also proposes a usage method of a mechanical connection tightening mechanism, including the following steps:

[0060] Step 1: Place the steel bar sleeve in the U-shaped groove at the top of the U-shaped placement seat 14. At the same time, place the two steel bars to be connected thereto in the lower semi-circular rotating cylinders 33 on both sides. Support the steel bars through a plurality of anti-slip clamping blocks 34 in the lower semi-circular rotating cylinders 33. The electric push rod 12 drives the lifting plate 13 to move downward. The lifting plate 13 combines with the auxiliary clamping spring 36 to carry the semi-circular rotating cylinders 33 installed on the upper mounting seats 31 on both sides to move downward, and first form a complete cylindrical rotating cylinder for the semi-circular rotating cylinders 33 on both sides of the U-shaped placement seat 14. The slot at the bottom of the upper semi-circular rotating cylinder 33 is snap-connected to the plug block at the top of the lower semi-circular rotating cylinder 33;

[0061] Step 2: After the upper semi-circular rotating cylinder 33 contacts the lower semi-circular rotating cylinder 33, through a number of anti-slip clamping blocks 34 inside the two, and combined with the tensile elastic force of the corresponding clamping spring 310, the centering clamping and fixing of the steel bar is contacted and completed. Through the sliding of the anti-slip clamping block 34 on the trapezoidal fixing block 39, centering clamping is performed on steel bars of different diameters. Then, with the continuous downward movement of the lifting plate 13, the two groups of L-shaped auxiliary plates 22 contact the corresponding push rods 25, guiding the push rods 25 to compress the return spring 27 and carry the V-shaped clamping blocks 21 to move. Using the V-shaped groove on the V-shaped clamping block 21, the centering clamping and fixing of the steel bar sleeve is completed, prompting the steel bar sleeve to be coaxially arranged with the steel bars on both sides. By rotating the threaded rod 24 in cooperation with the threaded tube 23, the distance between the push plate 112 and the V-shaped clamping block 21 is adjusted to perform centering clamping on steel bar sleeves of different diameters;

[0062] Step 3: The motor 110 drives the corresponding spline shaft 17 to rotate. The other spline shaft 17 rotates in the opposite direction through the meshing bevel gear one 18 and bevel gear two 19. The spline shaft 17 combines with the adapted bushing, and the meshing drive gear 37 and semi-circular tooth ring 38, prompting the cylindrical rotating cylinders on both sides of the U-shaped placement seat 14 to rotate in the opposite direction. And during the rotation process, combined with the sliding of the anti-slip clamping block 34 on the inclined surface of the trapezoidal fixing block 39, the anti-slip clamping block 34 is prompted to clamp the steel bar autonomously, causing the two groups of steel bars to rotate in the opposite direction;

[0063] Step 4: While the two sets of spline shafts 17 rotate, the screw rod 111 is driven to rotate through the pulley and the belt. The rotating screw rod 111 drives the corresponding push plate 112 to move close to the U-shaped placement seat 14. The push plate 112 combines with the resistance spring 113 to push the cylindrical rotating drum carrying the centering clamped steel bar to move, causing the threaded end of the steel bar to flexibly resist the steel bar sleeve, and combined with the rotation of the steel bar, the threaded connection of the two sets of steel bars and the steel bar sleeve is synchronously completed.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanical connection tightening mechanism, comprising a fixed seat (1), on which a frame (11) is welded, and a lifting plate (13) is installed on the frame (11) through an electric push rod (12), characterized in that, The top of the fixed seat (1) is fixedly connected with a U-shaped placement seat (14), and a centering fixing component (2) is arranged on the U-shaped placement seat (14). The centering fixing component (2) includes two groups of V-shaped clamping blocks (21). An L-shaped auxiliary plate (22) for driving the corresponding V-shaped clamping block (21) to move is fixedly connected to the lifting plate (13). Self-tightening clamping components (3) are arranged on both sides of the top of the fixed seat (1). The self-tightening clamping component (3) includes an upper mounting seat (31) and a lower mounting seat (32). Semi-circular rotating cylinders (33) are rotatably mounted on the opposite sides of the upper mounting seat (31) and the lower mounting seat (32). A number of anti-slip clamping blocks (34) are mounted on the inner side wall of the semi-circular rotating cylinder (33).

2. The mechanical connection tightening mechanism according to claim 1, characterized in that, Receiving grooves adapted to the V-shaped clamping blocks (21) are formed on the inner walls on both sides of the U-shaped placement seat (14). A threaded tube (23) that slides with the U-shaped placement seat (14) is fixedly connected to the V-shaped clamping block (21). A threaded rod (24) is threadedly connected to the threaded tube (23). A push rod (25) that cooperates with the L-shaped auxiliary plate (22) is rotatably connected to the threaded rod (24).

3. The mechanical connection tightening mechanism according to claim 2, characterized in that, An auxiliary rod (26) that slides with the U-shaped placement seat (14) and the V-shaped clamping block (21) is fixedly connected to the push rod (25). A return spring (27) is fixedly connected between the push rod (25) and the U-shaped placement seat (14) and on the outer side of the auxiliary rod (26).

4. A mechanical connection tightening mechanism according to claim 1, characterized in that, The top of the upper mounting seat (31) is fixedly connected with a sliding seat (35) through a plurality of telescopic sleeve rods. An auxiliary clamping spring (36) is fixedly connected between the sliding seat (35) and the upper mounting seat (31) and on the outer side of the telescopic sleeve rods. The sliding seat (35) is slidably connected to the lifting plate (13).

5. A mechanical connection tightening mechanism according to claim 1, wherein, Support plates (15) are symmetrically welded on both sides of the top of the fixed seat (1). A sliding rod (16) that slides with the lower mounting seat (32) is fixedly connected between the support plate (15) and the U-shaped placement seat (14), and a spline shaft (17) is rotatably connected. A sleeve adapted to the spline shaft (17) is rotatably connected to the lower mounting seat (32), and a driving gear (37) is fixedly connected to the sleeve. A semi-circular tooth ring (38) adapted to the driving gear (37) is fixedly connected to the semi-circular rotating cylinder (33).

6. The mechanical connection tightening mechanism according to claim 5, characterized in that, One end of the spline shaft (17) penetrates into the interior of the U-shaped placement seat (14) and is fixedly connected with a bevel gear one (18). A rotating shaft is installed inside the U-shaped placement seat (14), and a bevel gear two (19) that meshes with the two groups of bevel gears one (18) is rotatably connected to the rotating shaft. A motor (110) for driving the corresponding spline shaft (17) to rotate is bolted to one side of the support plate (15).

7. A mechanical connection tightening mechanism according to claim 5, characterized in that, A screw rod (111) is rotatably connected between the support plate (15) and the U-shaped placement seat (14), and a push plate (112) is threadedly connected to the screw rod (111) and slides with the slide rod (16). A resistance spring (113) is fixedly connected between the push plate (112) and the lower mounting seat (32) and located on the outside of the slide rod (16). The spline shaft (17) and the screw rod (111) are both fixedly connected with pulleys, and the pulleys are connected through belt transmission.

8. A mechanical connection tightening mechanism according to claim 1, characterized in that, A plurality of trapezoidal fixing blocks (39) matching corresponding anti-skid clamping blocks (34) are fixedly connected to the inner wall of the semicircular rotating cylinder (33); the anti-skid clamping blocks (34) are slidably connected to the oblique surfaces of the trapezoidal fixing blocks (39) via convex sliding blocks, and a clamping tension spring (310) is fixedly connected between the convex sliding blocks and the trapezoidal fixing blocks (39).

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