Tightening device for straight thread connection

Abstract

The invention provides a tightening device for straight thread connection, and relates to the technical field of straight thread connection tightening. The tightening device for straight thread connection comprises two supporting mechanisms, two extending mechanisms are fixedly arranged between the two supporting mechanisms through bolts, a clamping mechanism is arranged on the upper surface of one of the two supporting mechanisms on one side in a sliding mode, and a tightening mechanism is arranged on the upper surface of one of the two supporting mechanisms on the other side in a sliding mode. A plurality of guide mechanisms are slidably arranged on the surfaces of the two supporting mechanisms and the surfaces of the two extension mechanisms, the tightening mechanism comprises two first sliding blocks, a supporting table is fixedly arranged at the upper ends of the two first sliding blocks, a motor box is fixedly arranged at the upper end of the supporting table, and a tightening motor is fixedly arranged in the motor box; and a protective sleeve is fixedly arranged at the output end of the tightening motor. And through the adjustability and the extension function, the device can adapt to steel bars with different sizes and lengths, and has wide applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of straight thread connection tightening, and specifically provides a tightening device for straight thread connection. Background Art

[0002] Straight thread connection is to process the end of the steel bar into a straight thread, and then connect two steel bars through a connecting sleeve with internal threads. This connection method uses the mechanical bite between the threads to transmit the tensile or compressive force between the steel bars. Similar to the connection principle of bolts and nuts, the straight thread of the steel bar and the internal thread of the connecting sleeve cooperate with each other to make the steel bars connected into a whole.

[0003] The existing patent (Publication No.: CN113123603A) discloses "The present invention provides a straight thread sleeve quick electric tightening device and method. The device includes: a sleeve tightening device, including a base and at least one hoop for tightening the steel bar sleeve, and the hoop is arranged on the base; an electric tightening device, including a driving motor and a chuck for fixing the straight thread steel bar, the chuck is fixed at the transmission shaft end of the driving motor, and the centers of the transmission shaft, the chuck and the hoop are on the same axis; a moving mechanism is arranged at the bottom of the driving motor, and the moving mechanism includes a pair of tie rods oppositely arranged on the left and right sides of the driving motor, two groups of through holes are opened in the left and right alignment of the pair of tie rods, two wheel axles pass through the two groups of aligned through holes, a roller is sleeved at each of the left and right ends of each wheel axle, and a track for embedding the roller is arranged below the roller, and the track direction is parallel to the axis. The device provided by the present invention can efficiently and high-quality quickly screw the straight thread steel bar into the steel bar sleeve, improve the construction efficiency and enhance the benefit".

[0004] The inventor found the following problems in the process of implementing the present application: When the existing tightening device is in use, the structure for fixing the steel bar and the structure for fixing the sleeve are usually two parts, but the two parts are separate structures and there is no connection between them. When in use, relevant operators need to manually align the steel bar and the sleeve to realize the function of straight thread connection. When used as a whole, the operation difficulty is relatively large and the practicability is poor. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a tightening device for straight thread connection, which solves the problems of large docking difficulty and poor practicability when the existing device is in use.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A tightening device for straight thread connection, comprising two support mechanisms. Two extension mechanisms are fixedly arranged between the two support mechanisms through bolts. A clamping mechanism is slidably arranged on the upper surface of one side of the two support mechanisms, and a tightening mechanism is slidably arranged on the upper surface of the other side of the two support mechanisms. A plurality of guiding mechanisms are slidably arranged on the surfaces of the two support mechanisms and the two extension mechanisms;

[0007] The tightening mechanism includes two first sliders. A support platform is fixedly arranged at the upper ends of the two first sliders. A motor box is fixedly arranged at the upper end of the support platform. A tightening motor is fixedly arranged inside the motor box. A protective sleeve is fixedly arranged at the output end of the tightening motor. A steel bar fixing sleeve is arranged at the front end of the protective sleeve. Support ribs are fixedly arranged at the bottom surface of the support platform. First fixing knobs are threadedly arranged on both sides of the upper surfaces of the two first sliders.

[0008] Preferably, a second connecting shaft is rotatably arranged on one side inside the protective sleeve. An adjusting sleeve is fixedly arranged on one side of the second connecting shaft. One side of the adjusting sleeve is fixedly connected to a first connecting shaft, and one side of the first connecting shaft is fixedly connected to one side of the steel bar fixing sleeve. A plurality of adjusting holes are formed on the surface of the adjusting sleeve.

[0009] Preferably, a fixing pin is threadedly arranged at the middle position of the upper end of the protective sleeve. A spring is fixedly arranged at the lower end of the fixing pin, and a steel ball is fixedly arranged at the lower end of the spring.

[0010] Preferably, first locking knobs are threadedly arranged at the middle positions of both sides of the steel bar fixing sleeve. A first anti-slip washer is fixedly arranged on the inner surface of the steel bar fixing sleeve, and a plurality of anti-slip bumps are fixedly arranged at equal intervals on the inner surface of the first anti-slip washer.

[0011] Preferably, a box door is hingedly arranged at the upper end of the front surface of the motor box. A control panel is fixedly arranged at the middle position of the front surface of the box door, and a handle is fixedly arranged at the middle position of the bottom end of the front surface of the box door.

[0012] Preferably, the guiding mechanism includes two second sliders. Guide seats are fixedly arranged at the upper ends of the two second sliders. Two guide frames are fixedly arranged between the two guide seats. A plurality of guide rollers are rotatably arranged between the two guide frames. Second fixing knobs are threadedly arranged on the upper surfaces of the two second sliders.

[0013] Preferably, the clamping mechanism includes two third sliders. Third fixing knobs are threadedly arranged on both sides of the upper ends of the two third sliders. Clamping seats are fixedly arranged at the middle positions of the upper ends of the two third sliders.

[0014] Preferably, a sleeve fixing sleeve is fixedly arranged between the two clamping seats. Second locking knobs are threadedly arranged on both sides of the upper surface of the sleeve fixing sleeve, and a second anti-slip gasket is fixedly arranged inside the sleeve fixing sleeve.

[0015] Preferably, the support mechanism includes a support frame. A main body frame is fixedly arranged at the upper end of the support frame. First slide rails are fixedly arranged on both sides of the upper end of the main body frame. Two first splicing plates are fixedly arranged at one end of the main body frame. First splicing holes are formed at the four corners of the surfaces of the two first splicing plates.

[0016] Preferably, the extension mechanism includes an extension frame. A second slide rail is fixedly arranged on the upper surface of the extension frame. A support leg is fixedly arranged at the middle position of the bottom surface of the extension frame. A second splicing plate is fixedly arranged at one end of the extension frame. Second splicing holes are formed at the four corners of the surface of the second splicing plate.

[0017] Working principle: When the device is in use, first place the support mechanism on a stable workbench or the ground. According to the length of the steel bar, fix the extension mechanism on the splicing plate of the support mechanism through bolts to extend the overall length of the device and ensure that the first slide rail and the second slide rail of the support mechanism and the extension mechanism are in a horizontal state. Slide the clamping mechanism to the slide rail of the support mechanism or the extension mechanism through the third slider. Fix the position of the sleeve as needed and adjust the position of the clamping mechanism. Use the third fixing knob to fix the clamping mechanism on the slide rail. Place the connecting sleeve into the sleeve fixing sleeve and ensure that the internal thread of the sleeve is aligned with the external thread of the steel bar. Use the second locking knob to fix the sleeve in the sleeve fixing sleeve to ensure that the sleeve does not loosen during the tightening process. Slide the tightening mechanism to the slide rail of the support mechanism or the extension mechanism through the first slider. Fix the position of the steel bar as needed and adjust the position of the tightening mechanism. Use the first fixing knob to fix the tightening mechanism on the slide rail. Insert the steel bar into the steel bar fixing sleeve and fix the steel bar in the steel bar fixing sleeve through the first locking knob. Slide the guiding mechanism to the slide rail of the support mechanism or the extension mechanism through the second slider. Adjust the position of the guiding mechanism as needed so that it is located between the steel bar and the sleeve. Pass the steel bar through the guiding frame and guiding rollers of the guiding mechanism to ensure that the steel bar is aligned with the sleeve. After preparation is completed, start the tightening motor through the control panel. After the tightening motor starts, the protective sleeve and the steel bar fixing sleeve start to rotate, driving the steel bar to rotate so that the external thread of the steel bar engages with the internal thread of the sleeve to achieve tightening. When the steel bar is tightened in place, the steel balls inside the protective sleeve enter the adjustment holes under the action of the spring, making a sound to prompt the operator that the steel bar has been tightened in place. After hearing the prompt sound, stop the tightening motor through the control panel to ensure the safety of the equipment.

[0018] The present invention provides a tightening device for straight thread connection. It has the following beneficial effects:

[0019] 1. The present invention provides a tightening device for straight thread connection. Compared with the existing tightening devices, this tightening device drives the tightening mechanism through a motor to achieve the automatic tightening of the steel bar and the sleeve. The support mechanism and the extension mechanism provide stable support for the device, ensuring that the device will not shake during the tightening process, facilitating the user to align the steel bar and the sleeve, improving the reliability of the connection. The tightening mechanism, the clamping mechanism, and the guiding mechanism can all be adjusted according to the length and position of the steel bar and the sleeve through the slider and rail design, adapting to steel bars and sleeves of different sizes. The extension mechanism can extend the overall length of the device to adapt to steel bars of different lengths, improving the applicable range of the device and enhancing the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0021] Figure 2 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0022] Figure 3 is a schematic diagram of the extended state structure of the present invention Figure 1 ;

[0023] Figure 4 is a schematic diagram of the extended state structure of the present invention Figure 2 ;

[0024] Figure 5 is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the tightening mechanism of the present invention Figure 1 ;

[0026] Figure 7 is a schematic diagram of the structure of the tightening mechanism of the present invention Figure 2 ;

[0027] Figure 8 is a schematic diagram of the internal structure of the tightening mechanism of the present invention;

[0028] Figure 9 is a schematic diagram of the internal structure of the protective sleeve of the present invention;

[0029] Figure 10 is a schematic diagram of the structure of the guiding mechanism of the present invention;

[0030] Figure 11 is a schematic diagram of the structure of the support mechanism of the present invention;

[0031] Figure 12 is a schematic diagram of the structure of the extension mechanism of the present invention.

[0032] Among them, 1. Tightening mechanism; 2. Guiding mechanism; 3. Clamping mechanism; 4. Supporting mechanism; 5. Extension mechanism; 101. Control panel; 102. Handle; 103. Support platform; 104. First fixing knob; 105. First slider; 106. Motor box; 107. Fixing pin; 108. Protective sleeve; 109. Steel bar fixing sleeve; 110. First anti-slip washer; 111. Anti-slip bump; 112. First locking knob; 113. Cabinet door; 114. Support rib; 115. Tightening motor; 116. Spring; 117. Steel ball; 118. Adjusting sleeve; 119. Adjusting hole; 120. First connecting shaft; 121. Second connecting shaft; 201. Guide roller; 202. Guide frame; 203. Guide seat; 204. Second fixing knob; 205. Second slider; 301. Clamping seat; 302. Third fixing knob; 303. Third slider; 304. Second locking knob; 305. Sleeve fixing sleeve; 306. Second anti-slip washer; 401. First slide rail; 402. First splicing plate; 403. First splicing hole; 404. Main body frame; 405. Support frame; 501. Second slide rail; 502. Second splicing hole; 503. Second splicing plate; 504. Extension frame; 505. Support leg. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] As Figures 1-4 shown, the embodiment of the present invention provides a tightening device for straight thread connection, including two supporting mechanisms 4. Two extension mechanisms 5 are fixedly arranged between the two supporting mechanisms 4 through bolts. A clamping mechanism 3 is slidably arranged on the upper surface of one side of the two supporting mechanisms 4, and a tightening mechanism 1 is slidably arranged on the upper surface of the other side of the two supporting mechanisms 4. A plurality of guiding mechanisms 2 are slidably arranged on the surfaces of the two supporting mechanisms 4 and the two extension mechanisms 5.

[0035] Specifically, by providing the supporting mechanism 4, it is beneficial to provide a placement and support function for the overall use of the device. By providing the extension mechanism 5, it is convenient for the user to extend the overall length of the device according to the length of the steel bar, so that it can be applicable to different usage situations. By providing the clamping mechanism 3, it is convenient to fix the sleeve to be connected. By providing the guiding mechanism 2, it is convenient for the user to align the position of the steel bar and the sleeve. By providing the tightening mechanism 1, it is convenient to realize the tightening connection function of the steel bar and the sleeve when the device is used.

[0036] As shown Figures 5-12 in the figure, the tightening mechanism 1 includes two first sliders 105. At the upper ends of the two first sliders 105, a support platform 103 is fixedly arranged. At the upper end of the support platform 103, a motor box 106 is fixedly arranged. Inside the motor box 106, a tightening motor 115 is fixedly arranged. At the output end of the tightening motor 115, a protective sleeve 108 is fixedly arranged. At the front end of the protective sleeve 108, a steel bar fixing sleeve 109 is arranged. At the bottom surface of the support platform 103, support rib plates 114 are fixedly arranged. On both sides of the upper surfaces of the two first sliders 105, first fixing knobs 104 are threadedly arranged. On one side inside the protective sleeve 108, a second connecting shaft 121 is rotatably arranged. On one side of the second connecting shaft 121, an adjusting sleeve 118 is fixedly arranged. On one side of the adjusting sleeve 118, a first connecting shaft 120 is fixedly connected. One side of the first connecting shaft 120 is fixedly connected to one side of the steel bar fixing sleeve 109. On the surface of the adjusting sleeve 118, a plurality of adjusting holes 119 are formed. At the middle position of the upper end of the protective sleeve 108, a fixing pin 107 is threadedly arranged. At the lower end of the fixing pin 107, a spring 116 is fixedly arranged. At the lower end of the spring 116, a steel ball 117 is fixedly arranged.

[0037] Specifically, by setting the first slider 105 and combining with the first fixing knob 104, when the user is using, the position of the tightening mechanism 1 can be adjusted through the first slider 105. After the adjustment is completed, its position can be fixed through the first fixing knob 104. By setting the motor box 106, it is convenient to provide protection for the tightening motor 115. By setting the tightening motor 115, it is beneficial to realize the function of tightening the steel bar when the device is used. By setting the protective sleeve 108, when in use, the user can tighten the fixing pin 107 to make the steel ball 117 enter the adjusting hole 119. When tightening the steel bar, when the steel bar is in place, under the action of the tightening motor 115, relative rotation will occur between the protective sleeve 108 and the adjusting sleeve 118, and the steel ball 117 will move relatively under the action of the spring 116, thereby making a sound, which is convenient for the user to judge that the steel bar is tightened in place and timely turn off the device to avoid damaging the device. By setting the support platform 103 and the support rib plates 114, it is convenient to provide support for the tightening mechanism 1 and ensure its stability.

[0038] At the middle positions on both sides of the steel bar fixing sleeve 109, first locking knobs 112 are threadedly arranged. On the inner surface of the steel bar fixing sleeve 109, a first anti-slip washer 110 is fixedly arranged. On the inner surface of the first anti-slip washer 110, a plurality of anti-slip bumps 111 are fixedly arranged at equal intervals. At the upper end of the front surface of the motor box 106, a box door 113 is hingedly arranged. At the middle position of the front surface of the box door 113, a control panel 101 is fixedly arranged. At the middle position of the bottom end of the front surface of the box door 113, a handle 102 is fixedly arranged.

[0039] Specifically, by setting the first locking knob 112 and combining it with the steel bar fixing sleeve 109, it is convenient for the user to fix the steel bar into the steel bar fixing sleeve 109 during use. By setting the first anti-slip washer 110 and combining it with the anti-slip bumps 111 on its surface, it is convenient to increase the friction between the device and the steel bar and improve the stability of steel bar fixing. By setting the box door 113, it is convenient for the user to perform maintenance and repair on the inside of the device. By setting the control panel 101, it is convenient for the user to control and adjust the overall working state of the device. By setting the handle 102, it is convenient for the user to open and close the box door 113.

[0040] The guiding mechanism 2 includes two second sliders 205. At the upper ends of the two second sliders 205, guiding seats 203 are fixedly arranged. Between the two guiding seats 203, two guiding frames 202 are fixedly arranged. Between the two guiding frames 202, a plurality of guiding rollers 201 are rotatably arranged. On the upper surfaces of the two second sliders 205, two second fixing knobs 204 are threadedly arranged.

[0041] Specifically, by setting the second slider 205 and combining it with the second fixing knob 204 at its upper end, during use, the user can adjust the position of the second slider 205 on the surface of the first slide rail 401 and fix it with the second fixing knob 204, which is convenient for the device to be applicable to steel bars of different lengths. By setting the guiding frame 202, it is beneficial to provide support for the steel bar and facilitate the user to align the steel bar with the sleeve. By setting the guiding roller 201, it is convenient to reduce the friction between the steel bar and the guiding mechanism 2 and improve the service life of the device.

[0042] The clamping mechanism 3 includes two third sliders 303. On both sides of the upper ends of the two third sliders 303, third fixing knobs 302 are threadedly arranged. At the middle positions of the upper ends of the two third sliders 303, clamping seats 301 are fixedly arranged. Between the two clamping seats 301, a sleeve fixing sleeve 305 is fixedly arranged. On both sides of the upper surface of the sleeve fixing sleeve 305, second locking knobs 304 are threadedly arranged. Inside the sleeve fixing sleeve 305, a second anti-slip washer 306 is fixedly arranged.

[0043] Specifically, by setting the third slider 303 and combining it with the third fixing knob 302, during use, the user can adjust the position of the entire clamping mechanism 3 on the surface of the first slide rail 401 through the third slider 303 and fix it with the third fixing knob 302. By setting the clamping seat 301, it is beneficial to provide support for the sleeve fixing sleeve 305. By setting the sleeve fixing sleeve 305 and combining it with the second anti-slip washer 306 inside, the sleeve can be fixed. By setting the second locking knob 304, it is beneficial to improve the stability of sleeve fixing.

[0044] The support mechanism 4 includes a support frame 405. A main frame 404 is fixedly arranged at the upper end of the support frame 405. First slide rails 401 are fixedly arranged on both sides at the upper end of the main frame 404. Two first splicing plates 402 are fixedly arranged at one end of the main frame 404. First splicing holes 403 are formed at the four corners of the surfaces of the two first splicing plates 402.

[0045] Specifically, by providing the main frame 404 and combining it with the support frame 405, it is beneficial to provide a basis for placing and supporting the whole device. By providing the first slide rails 401, when the user is using the device, the positions of the tightening mechanism 1, the guiding mechanism 2 and the clamping mechanism 3 can be adjusted, which is convenient for the device to fix steel bars of different lengths. By providing the first splicing plates 402 and the first splicing holes 403, when the user is using the device, the second splicing holes 502 and the second splicing plates 503 can be fixed by bolts, or the first splicing plates 402 and the first splicing holes 403 can be combined by bolts to complete the functions of extending and splicing multiple devices.

[0046] The extension mechanism 5 includes an extension frame 504. A second slide rail 501 is fixedly arranged on the upper surface of the extension frame 504. A support leg 505 is fixedly arranged at the middle position of the bottom surface of the extension frame 504. A second splicing plate 503 is fixedly arranged at one end of the extension frame 504. Second splicing holes 502 are formed at the four corners of the surface of the second splicing plate 503.

[0047] Specifically, by providing the extension frame 504, it is convenient for the user to extend the whole device when using it. By providing the second slide rail 501, it is convenient for the user to slide and adjust the positions of the tightening mechanism 1, the guiding mechanism 2 and the clamping mechanism 3. By providing the support leg 505, it is beneficial to provide support for the use of the extension mechanism 5. By providing the second splicing plates 503 and the second splicing holes 502, when in use, the user can connect the second splicing plates 503 and the second splicing holes 502 to the first splicing plates 402 and the first splicing holes 403 by bolts to complete the extension function of the device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tightening device for straight thread connection, comprising two supporting mechanisms (4), characterized in that: Two extension mechanisms (5) are fixedly arranged between the two support mechanisms (4) by bolts. A clamping mechanism (3) is slidably arranged on the upper surface of one of the two support mechanisms (4) on one side, and a tightening mechanism (1) is slidably arranged on the upper surface of one of the two support mechanisms (4) on the other side. A plurality of guiding mechanisms (2) are slidably arranged on the surfaces of the two support mechanisms (4) and the two extension mechanisms (5). The tightening mechanism (1) includes two first sliders (105). A support platform (103) is fixedly arranged at the upper ends of the two first sliders (105). A motor box (106) is fixedly arranged at the upper end of the support platform (103). A tightening motor (115) is fixedly arranged inside the motor box (106). A protective sleeve (108) is fixedly arranged at the output end of the tightening motor (115). A steel bar fixing sleeve (109) is arranged at the front end of the protective sleeve (108). Support ribs (114) are fixedly arranged at the bottom surface of the support platform (103). First fixing knobs (104) are threadedly arranged on both sides of the upper surfaces of the two first sliders (105).

2. The tightening device for straight thread connection according to claim 1, characterized in that: A second connecting shaft (121) is rotatably arranged on one side inside the protective sleeve (108). An adjusting sleeve (118) is fixedly arranged on one side of the second connecting shaft (121). A first connecting shaft (120) is fixedly connected to one side of the adjusting sleeve (118). The first connecting shaft (120) is fixedly connected to one side of the steel bar fixing sleeve (109). A plurality of adjusting holes (119) are formed on the surface of the adjusting sleeve (118).

3. The tightening device for straight thread connection according to claim 1, characterized in that: A fixing pin (107) is threadedly arranged at the middle position of the upper end of the protective sleeve (108). A spring (116) is fixedly arranged at the lower end of the fixing pin (107). A steel ball (117) is fixedly arranged at the lower end of the spring (116).

4. The tightening device for straight thread connection according to claim 1, characterized in that: First locking knobs (112) are threadedly arranged at the middle positions of both sides of the steel bar fixing sleeve (109). A first anti-slip washer (110) is fixedly arranged on the inner surface of the steel bar fixing sleeve (109). A plurality of anti-slip bumps (111) are fixedly arranged at equal intervals on the inner surface of the first anti-slip washer (110).

5. A tightening device for straight thread connection according to claim 1, characterized in that: A box door (113) is hingedly arranged at the upper end of the front surface of the motor box (106). A control panel (101) is fixedly arranged at the middle position of the front surface of the box door (113). A handle (102) is fixedly arranged at the middle position of the bottom end of the front surface of the box door (113).

6. The tightening device for straight thread connection according to claim 1, characterized in that: The guiding mechanism (2) includes two second sliders (205). Guide seats (203) are fixedly arranged at the upper ends of the two second sliders (205). Two guide frames (202) are fixedly arranged between the two guide seats (203). A plurality of guide rollers (201) are rotatably arranged between the two guide frames (202). Two second fixing knobs (204) are threadedly arranged on the upper surfaces of the two second sliders (205).

7. A tightening device for straight thread connection according to claim 1, characterized in that: The clamping mechanism (3) includes two third sliders (303). On both sides of the upper ends of the two third sliders (303), third fixing knobs (302) are threadedly arranged. At the middle positions of the upper ends of the two third sliders (303), clamping seats (301) are fixedly arranged.

8. The tightening device for straight thread connection according to claim 7, characterized in that: A sleeve fixing sleeve (305) is fixedly arranged between the two clamping seats (301). On both sides of the upper surface of the sleeve fixing sleeve (305), second locking knobs (304) are threadedly arranged. A second anti-slip washer (306) is fixedly arranged inside the sleeve fixing sleeve (305).

9. The tightening device for straight thread connection according to claim 1, characterized in that: The support mechanism (4) includes a support frame (405). At the upper end of the support frame (405), a main body frame (404) is fixedly arranged. On both sides of the upper end of the main body frame (404), first slide rails (401) are fixedly arranged. At one end of the main body frame (404), two first splicing plates (402) are fixedly arranged. At the four corners of the surfaces of the two first splicing plates (402), first splicing holes (403) are formed.

10. The tightening device for straight thread connection according to claim 1, characterized in that: The extension mechanism (5) includes an extension frame (504). On the upper surface of the extension frame (504), a second slide rail (501) is fixedly arranged. At the middle position of the bottom surface of the extension frame (504), a support leg (505) is fixedly arranged. At one end of the extension frame (504), a second splicing plate (503) is fixedly arranged. At the four corners of the surface of the second splicing plate (503), second splicing holes (502) are formed.

Images