Air conditioner air pipe flange bolt synchronous tightening device

Abstract

The application discloses a kind of air conditioner air pipe flange bolt synchronous tightening device, it is related to electromechanical installation field, technical scheme is, including bottom plate, two horizontal rails are fixedly arranged on the bottom plate, sliding frame is slidably arranged on the horizontal rail, fixed frame is also fixedly arranged on the bottom plate, the upper surface of fixed frame and sliding frame is flush;Sliding rail is fixedly arranged on the sliding frame and fixed frame, two sliding blocks are slidably arranged on each sliding rail, and the sliding block of same side is connected by connecting frame;A group of bolt fastening units is respectively arranged on the sliding block slidably connected with the fixed frame, and a group of nut fastening units is respectively arranged on the sliding block slidably connected with the sliding frame.The beneficial effects of the application are: multiple bolts can be simultaneously tightened, compared with traditional manual operation, the installation time is greatly shortened, and the work efficiency is improved several times;It can be adapted to different specifications of air conditioner air pipe flange, and has strong versatility.

Description

Technical Field

[0001] This invention relates to the field of electromechanical installation, and in particular to a device for synchronously tightening flange bolts of air conditioning ducts. Background Technology

[0002] Ventilation ducts are metal or non-metal pipes suspended from the ceiling of industrial and civil buildings for ventilation and air conditioning systems. They are structures designed to allow air circulation. Their structure consists of several cylindrical segments joined together, with connections typically achieved using two flanges secured with fasteners.

[0003] However, traditional bolt tightening operations rely primarily on manual labor, requiring workers to hold tools and tighten each bolt individually. This method is not only inefficient but also extremely physically demanding. Furthermore, due to the large number of bolts involved, the low efficiency of traditional methods severely impacts the overall construction progress of the project. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a device for synchronously tightening flange bolts of air conditioning ducts.

[0005] The technical solution includes a base plate, on which two transverse guide rails are fixedly mounted, and a sliding frame is slidably mounted on the transverse guide rails. A fixed frame is also fixedly mounted on the base plate, and the upper surfaces of the fixed frame and the sliding frame are flush.

[0006] Both the sliding frame and the fixed frame are fixedly equipped with slide rails, and two sliders are slidably arranged on each slide rail. The two sliders on the same side are connected by a connecting frame.

[0007] A set of bolt fastening units is provided on each of the sliders that are slidably connected to the fixed frame, and a set of nut fastening units is provided on each of the sliders that are slidably connected to the sliding frame. The bolt fastening units and nut fastening units on the same side are arranged opposite to each other.

[0008] Preferably, both the bolt fastening unit and the nut fastening unit include a stand fixedly mounted on the slider, and each stand has a plurality of lifting bases slidably mounted on it, and each lifting base has a mounting seat fixedly mounted on it.

[0009] A sleeve post is fixedly installed on each of the mounting seats located on the fixed frame, and a bolt sleeve is detachably installed on the sleeve post;

[0010] A sleeve column is rotatably provided on each of the mounting seats located on the sliding frame, and a nut sleeve is detachably provided on the sleeve column;

[0011] The bolt sleeve and the nut sleeve are arranged opposite to each other.

[0012] Preferably, an adjusting rod is rotatably provided in the middle of the support frame, and the lower end of the adjusting rod is threaded, and the thread of the adjusting rod is threadedly connected to the lowermost lifting base.

[0013] A vertical sliding groove is provided on the upright frame, and a boss is fixedly provided on the side of the lifting base away from the mounting base. The boss slides in the sliding groove.

[0014] Two connecting rods are rotatably mounted on each of the protrusions. The middle part of the connecting rod is rotatably connected to the protrusion, and the two ends of the connecting rod are respectively rotatably connected to the connecting rod on the adjacent lifting base.

[0015] A short connecting rod is rotatably mounted on each of the two connecting rods located at the bottom end. The movable ends of the two short connecting rods are rotatably connected to each other and rotatably connected to the lower end of the upright frame.

[0016] Preferably, each of the mounting seats on the sliding frame is fixedly provided with an L-shaped mounting plate, one end of the mounting plate is fixedly connected to the mounting seat, and the other end is rotatably provided with a drive bevel gear;

[0017] A driven bevel gear is also rotatably mounted on the mounting base. The driven bevel gear is coaxially fixed with the sleeve column, and the driving bevel gear and the driven bevel gear mesh.

[0018] Multiple active bevel gears are linked by a transmission rod, and a transmission rod motor is fixedly installed at the lower end of the upright frame. The motor shaft of the transmission rod motor is coaxially fixed with the transmission rod.

[0019] Preferably, the length of the nut sleeve is greater than the length of the bolt sleeve, a magnet is fixedly installed at one end of the nut sleeve near the open end, a through hole is provided in the middle of the magnet, and the diameter of the through hole is greater than the diameter of the bolt to be installed;

[0020] A magnet is installed inside the bolt sleeve.

[0021] Preferably, a screw is rotatably disposed in the middle of the base plate, the screw is threadedly connected to the sliding frame, and a transverse motor is fixedly disposed in the middle of the base plate, the motor shaft of the transverse motor being coaxially fixed with the screw.

[0022] Preferably, a handle is fixedly provided on the side of the base plate away from the sliding frame and the fixed frame. The handle is provided with two control switches, and each control switch controls the operation of the transverse motor and the drive shaft motor respectively.

[0023] Preferably, the connecting frame includes a fixing part fixedly disposed on one of the sliders, a telescopic part sleeved inside the fixing part, and the telescopic part being fixedly connected to the other slider.

[0024] Preferably, a scale line is provided at the lower part of the upright frame, and pointers are fixedly provided on the two lifting bases located below.

[0025] The beneficial effects of the technical solution provided by the embodiments of the present invention are: it can achieve simultaneous tightening of multiple bolts, which greatly shortens the installation time and improves work efficiency several times compared with the traditional manual operation; it can adapt to different specifications of air conditioning duct flanges and has strong versatility; moreover, it is easy to operate and reduces the labor intensity of workers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the usage state of an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the bolt fastening unit and nut fastening unit according to an embodiment of the present invention. Figure 1 .

[0029] Figure 4 This is a schematic diagram of the bolt fastening unit and nut fastening unit according to an embodiment of the present invention. Figure 2 .

[0030] Figure 5 This is a schematic diagram of two opposing lifting bases and a transmission rod motor, etc., according to an embodiment of the present invention.

[0031] Figure 6 This is an exploded view of the sleeve column, bolt sleeve, and nut sleeve, etc., according to an embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the base plate and sliding frame according to an embodiment of the present invention.

[0033] The attached diagram is labeled as follows: 1. Base plate; 2. Horizontal guide rail; 3. Sliding frame; 4. Fixed frame; 5. Slide rail; 6. Slider; 7. Connecting frame; 8. Bolt fastening unit; 9. Nut fastening unit; 10. Upright frame; 11. Lifting base; 12. Mounting base; 13. Sleeve column; 14. Bolt sleeve; 15. Nut sleeve; 16. Adjusting rod; 17. Connecting rod; 18. Short connecting rod; 19. Mounting plate; 20. Driving bevel gear; 21. Driven bevel gear; 22. Transmission rod; 23. Transmission rod motor; 24. Screw; 25. Horizontal motor; 26. Handle; 27. Air conditioning duct. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this 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, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Example 1

[0039] See Figures 1 to 7 The present invention provides a synchronous tightening device for flange bolts of air conditioning duct, including a base plate 1, two transverse guide rails 2 fixedly mounted on the base plate 1, a sliding frame 3 slidably mounted on the transverse guide rails 2, and a fixed frame 4 fixedly mounted on the base plate 1, the upper surfaces of the fixed frame 4 and the sliding frame 3 being flush.

[0040] Slide rails 5 are fixedly installed on both the sliding frame 3 and the fixed frame 4. Two sliders 6 are slidably installed on each slide rail 5. The two sliders 6 on the same side are connected by a connecting frame 7.

[0041] Each slider 6 is also provided with a threaded hole, and the threaded hole is connected to the limit bolt; the connecting frame 7 enables the two sliders 6 to slide synchronously. By adjusting the position of the slider 6, the bolt fastening unit 8 and the nut fastening unit 9 are respectively aligned with the corresponding bolt and nut positions on the air duct flange. After adjustment, the slider 6 is fixed on the slide rail 5 by tightening the limit bolt to prevent it from shifting during operation.

[0042] A set of bolt fastening units 8 are respectively provided on the slider 6 that is slidably connected to the fixed frame 4, and a set of nut fastening units 9 are respectively provided on the slider 6 that is slidably connected to the sliding frame 3. The bolt fastening units 8 and nut fastening units 9 on the same side are arranged opposite to each other.

[0043] Before use, according to the size of the air conditioning duct 27, move the slider 6 to make the distance between the bolt fastening unit 8 and the nut fastening unit 9 on both sides correspond to the distance between the flange holes on both sides of the air conditioning duct 27. Place the bolts on the bolt fastening unit 8 and the nuts on the nut fastening unit 9 respectively. Move the sliding bracket 3 to make the nut fastening unit 9 move closer to the bolt fastening unit 8. The flange bolts of the air conditioning duct 27 are tightened synchronously by the bolt fastening unit 8 and the nut fastening unit 9.

[0044] Both the bolt fastening unit 8 and the nut fastening unit 9 include a stand 10 fixedly mounted on the slider 6. Several lifting bases 11 are slidably mounted on each stand 10, and a mounting seat 12 is fixedly mounted on each lifting base 11.

[0045] The uprights 10, lifting base 11 and mounting base 12 on the two sliders 6 on the same slide rail 5 are all set opposite to each other. Since the air conditioning ducts 27 of different specifications have different sizes, the spacing between the corresponding bolt mounting holes is also different. By adjusting the position of the lifting base 11 on the uprights 10, the bolts and nuts can be accurately aligned with the mounting holes of the air conditioning ducts 27.

[0046] A sleeve post 13 is fixedly installed on each mounting seat 12 located on the fixed frame 4, and a bolt sleeve 14 is detachably installed on the sleeve post 13;

[0047] A sleeve post 13 is rotatably mounted on each mounting seat 12 located on the sliding frame 3, and a nut sleeve 15 is detachably mounted on the sleeve post 13;

[0048] Bolt sleeve 14 and nut sleeve 15 are positioned opposite each other.

[0049] Based on the specifications of the bolts and nuts on the flange of the air conditioning duct 27, select the appropriate bolt sleeve 14 and nut sleeve 15, and install them on the corresponding sleeve posts 13 respectively. The bolt sleeve 14 is installed on the sleeve post 13 of the mounting seat 12 on the fixed bracket 4, and the nut sleeve 15 is installed on the sleeve post 13 of the mounting seat 12 on the sliding bracket 3, ensuring that the bolt sleeve 14 and nut sleeve 15 are set opposite to each other.

[0050] Both the bolt sleeve 14 and the nut sleeve 15 on the sleeve column 13 are detachable. When encountering flange bolts and nuts of different specifications of air conditioning duct 27, the sleeves can be replaced conveniently and quickly, which enhances the versatility of the device and can be applied to the installation of various ducts of different specifications.

[0051] An adjusting rod 16 is rotatably installed in the middle of the upright frame 10. The lower end of the adjusting rod 16 is threaded, and the thread of the adjusting rod 16 is threadedly connected to the lowest lifting base 11.

[0052] A knob is coaxially fixed at the upper end of the adjusting rod 16;

[0053] A vertical groove is provided on the upright frame 10, and a boss is fixedly provided on the side of the lifting base 11 away from the mounting base 12. The boss slides in the groove.

[0054] Two connecting rods 17 are rotatably mounted on each boss. The middle part of the connecting rod 17 is rotatably connected to the boss, and the two ends of the connecting rod 17 are rotatably connected to the connecting rod 17 on the adjacent lifting base 11.

[0055] A short connecting rod 18 is rotatably mounted on each of the two connecting rods 17 at the bottom. The movable ends of the two short connecting rods 18 are rotatably connected to each other and rotatably connected to the lower end of the upright frame 10.

[0056] Before tightening the flange bolts of the air conditioning duct 27, observe the distribution spacing of the mounting holes on the air conditioning duct 27 on the duct flange. If it is necessary to adjust the spacing between the lifting bases 11, turn the knob. The knob will drive the adjusting rod 16 to rotate. Since the lower end of the adjusting rod 16 is threadedly connected to the lowest lifting base 11, when the adjusting rod 16 rotates, the lowest lifting base 11 will move up and down along the stand 10.

[0057] When the lowest lifting base 11 moves, the connecting rod 17 rotatably mounted on its boss will drive the connecting rod 17 on the adjacent lifting base 11 to move. Because the middle part of the connecting rod 17 is rotatably connected to the boss, and both ends are rotatably connected to the connecting rod 17 on the adjacent lifting base 11, each lifting base 11 will move in sequence under the drive of the movement of the lowest lifting base 11. They will move up or down simultaneously as needed, so that the mounting seat 12 on each lifting base 11 and its corresponding sleeve column 13 and sleeve spacing are adjusted to fit the mounting holes with different spacing.

[0058] Once the lifting base 11 is adjusted to the appropriate position, stop turning the knob. At this time, the adjusting rod 16 will no longer rotate, and the position of the lowest lifting base 11 will be fixed. Due to the linkage structure of the connecting rod 17, the other lifting bases 11 will also be fixed in the corresponding positions, ensuring that the bolts and nuts can be stably aligned with the mounting holes of the duct flange during subsequent tightening operations.

[0059] The spacing between the lifting bases 11 can be easily adjusted by turning the knob, adapting to different spacing of the mounting holes on the flanges of different specifications of air conditioning ducts 27. This greatly improves the versatility and applicability of the device, eliminating the need to replace different devices for flanges with different spacings and reducing the cost of use.

[0060] By utilizing the linkage design of the connecting rod 17, only the lowest lifting base 11 needs to be adjusted, and the other lifting bases 11 can be adjusted synchronously. The operation is simple and quick, reducing the tedious process of adjusting the position of each lifting base 11 individually and improving work efficiency. At the same time, this linkage structure can ensure that the spacing between each lifting base 11 is adjusted evenly and consistently, so that the sleeve is subjected to more even force during the tightening process, thus improving the tightening quality.

[0061] An L-shaped mounting plate 19 is fixedly installed on each mounting seat 12 located on the sliding frame 3. One end of the mounting plate 19 is fixedly connected to the mounting seat 12, and the other end is rotatably equipped with a drive bevel gear 20.

[0062] A driven bevel gear 21 is also rotatably mounted on the mounting base 12. The driven bevel gear 21 is coaxially fixed with the sleeve column 13, and the driving bevel gear 20 and the driven bevel gear 21 mesh.

[0063] Multiple active bevel gears 20 are linked by a transmission rod 22. The active bevel gears 20 are radially fixed and circumferentially sliding relative to the transmission rod 22. This characteristic of the active bevel gears 20 being radially fixed and circumferentially sliding relative to the transmission rod 22 ensures that the transmission system can still work normally when the position of the lifting base 11 is adjusted according to different flange bolt spacings of the air conditioning duct 27. The power transmission and synchronous tightening function will not be affected by the position adjustment. This design enhances the adaptability of the device to various specifications of air conditioning duct 27 flanges, improves the versatility of the device, and reduces the cost of use. A transmission rod motor 23 is fixedly installed at the lower end of the support frame 10. The motor shaft of the transmission rod motor 23 is coaxially fixed with the transmission rod 22.

[0064] When the transmission rod motor 23 is turned on, the motor shaft drives the transmission rod 22 to rotate. Since the driving bevel gear 20 is radially fixed and circumferentially sliding relative to the transmission rod 22, the rotation of the transmission rod 22 can drive all the driving bevel gears 20 to rotate synchronously. Because the driven bevel gear 21 is coaxially fixed with the sleeve column 13, the rotation of the driven bevel gear 21 will cause the sleeve column 13 to drive the nut sleeve 15 to rotate, thereby tightening the nut. In this process, the meshing of the driving bevel gear 20 and the driven bevel gear 21 provides additional power support for the rotation of the driven bevel gear 21 on the one hand, and ensures the smoothness of the rotation of the driven bevel gear 21 on the other hand. As the nut sleeve 15 rotates, the nut is gradually tightened, and at the same time, the bolt sleeve 14 on the fixing bracket 4 cooperates to complete the synchronous tightening of the bolt and nut.

[0065] By connecting multiple active bevel gears 20 with the transmission rod 22, the synchronous rotation of multiple nut sleeves 15 can be achieved. Compared with the traditional method of tightening nuts one by one, this greatly improves the efficiency of tightening the flange bolts of the air conditioning duct 27, significantly shortens the installation time, and improves the overall work efficiency.

[0066] The length of the nut sleeve 15 is greater than the length of the bolt sleeve 14. A magnet is fixedly installed at one end of the nut sleeve 15 near the open end. A through hole is provided in the middle of the magnet. The diameter of the through hole is greater than the diameter of the bolt to be installed.

[0067] A magnet is installed inside the bolt sleeve 14.

[0068] Before tightening the flange bolts of the air conditioning duct 27, select suitable bolt sleeves 14 and nut sleeves 15 according to the specifications of the mounting holes on the duct flange, and install them on the corresponding sleeve posts 13. The magnets on the nut sleeves 15 and bolt sleeves 14 can automatically attract the nuts and bolts, and fix them firmly in the bolt sleeves 14 and nut sleeves 15 by magnetic attraction, so as to prevent the bolts and nuts from falling off during the operation.

[0069] A screw 24 is rotatably mounted in the middle of the base plate 1. The screw 24 is threadedly connected to the sliding frame 3. A transverse motor 25 is also fixedly mounted in the middle of the base plate 1. The motor shaft of the transverse motor 25 is coaxially fixed with the screw 24.

[0070] Since the initial distance between the bolt fastening unit 8 and the nut fastening unit 9 is large, the nut cannot be installed on the bolt. When using this device, first move the device so that the bolt is inserted into the mounting hole of the duct flange. Then, start the transverse motor 25. Since the motor shaft of the transverse motor 25 is coaxially fixed with the screw 24, the motor will drive the screw 24 to rotate after starting. The screw 24 is threadedly connected to the sliding frame 3. When the screw 24 rotates, the sliding frame 3 will move laterally along the axial direction of the screw 24 on the transverse guide rail 2, so that the nut gradually approaches the bolt until the nut and bolt are tightened.

[0071] The sliding frame 3 is moved by rotating the screw 24 driven by the transverse motor 25. The operator only needs to control the start, stop and forward and reverse rotation of the motor to easily adjust the position of the sliding frame 3. There is no need to manually push the sliding frame 3, which greatly simplifies the operation process, reduces the labor intensity of the operator, and improves work efficiency.

[0072] A handle 26 is fixedly installed on the side of the base plate 1 away from the sliding frame 3 and the fixed frame 4. The handle 26 is equipped with two control switches, each of which controls the operation of the transverse motor 25 and the drive shaft motor respectively.

[0073] The operator starts the transverse motor 25 by controlling the switch on one side of handle 26. Since the motor shaft of the transverse motor 25 is coaxially fixed with the screw 24, the motor drives the screw 24 to rotate. The screw 24 is threadedly connected to the sliding frame 3, allowing the sliding frame 3 to move laterally on the transverse guide rail 2. The operator can control the forward and reverse rotation of the transverse motor 25 according to the actual width of the air conditioning duct 27 flange, and precisely adjust the distance between the sliding frame 3 and the fixed frame 4. After adjusting to the appropriate position, the operator turns off the transverse motor 25 by controlling the switch to fix the sliding frame 3.

[0074] After the sliding frame 3 is positioned, the operator starts the drive shaft motor by controlling the control switch on the other side of the handle 26. The drive shaft motor drives the drive rod 22 to rotate, and the drive rod 22 drives multiple driven bevel gears 21 to rotate synchronously. The driven bevel gears 21 are coaxially fixed with the sleeve column 13, thereby causing the nut sleeve 15 to rotate. During the rotation of the nut sleeve 15, the sliding frame 3 is moved towards the fixed frame 4 by the transverse motor 25, so that the nut gradually approaches the bolt until the nut and bolt are tightened.

[0075] The two control switches on the handle 26 control the operation of the transverse motor 25 and the drive shaft motor respectively. During operation, the operator can easily control the start and stop of the motor by simply holding the handle 26. This design makes the operation more centralized and convenient, reduces the number of operation steps and time, and improves work efficiency.

[0076] When using this invention, before use, first, according to the size of the air conditioning duct 27, move the slider 6 to make the distance between the bolt fastening unit 8 and the nut fastening unit 9 on both sides correspond to the distance between the flange holes on both sides of the air conditioning duct 27. Place the bolts on the bolt fastening unit 8 and the nuts on the nut fastening unit 9 respectively. Move the sliding bracket 3 to make the nut fastening unit 9 move closer to the bolt fastening unit 8. The flange bolts of the air conditioning duct 27 are tightened synchronously by the bolt fastening unit 8 and the nut fastening unit 9.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for synchronously tightening flange bolts of an air conditioning duct, characterized in that, Includes a base plate (1), on which two transverse guide rails (2) are fixedly installed, and a sliding frame (3) is slidably installed on the transverse guide rails (2). A fixed frame (4) is also fixedly installed on the base plate (1), and the upper surfaces of the fixed frame (4) and the sliding frame (3) are flush. Slide rails (5) are fixedly installed on both the sliding frame (3) and the fixed frame (4). Two sliders (6) are slidably installed on each slide rail (5). The two sliders (6) on the same side are connected by a connecting frame (7). A set of bolt fastening units (8) are respectively provided on the slider (6) which is slidably connected to the fixed frame (4), and a set of nut fastening units (9) are respectively provided on the slider (6) which is slidably connected to the sliding frame (3). The bolt fastening units (8) and nut fastening units (9) on the same side are arranged opposite to each other. Both the bolt fastening unit (8) and the nut fastening unit (9) include a stand (10) fixedly mounted on the slider (6), and several lifting bases (11) are slidably mounted on each stand (10), and a mounting seat (12) is fixedly mounted on each lifting base (11). A sleeve column (13) is fixedly installed on each of the mounting seats (12) located on the fixed frame (4), and a bolt sleeve (14) is detachably installed on the sleeve column (13). A sleeve column (13) is rotatably provided on each of the mounting seats (12) located on the sliding frame (3), and a nut sleeve (15) is detachably provided on the sleeve column (13). The bolt sleeve (14) is disposed opposite to the nut sleeve (15); An adjusting rod (16) is rotatably provided in the middle of the support frame (10). The lower end of the adjusting rod (16) is provided with a thread, and the thread of the adjusting rod (16) is threadedly connected to the lowermost lifting base (11). A vertical sliding groove is provided on the upright frame (10), and a boss is fixedly provided on the side of the lifting base (11) away from the mounting base (12), and the boss slides in the sliding groove; Two connecting rods (17) are rotatably provided on each of the bosses. The middle part of the connecting rod (17) is rotatably connected to the boss, and the two ends of the connecting rod (17) are respectively rotatably connected to the connecting rod (17) on the adjacent lifting base (11). A short connecting rod (18) is rotatably mounted on each of the two connecting rods (17) at the bottom end. The movable ends of the two short connecting rods (18) are rotatably connected to each other and rotatably connected to the lower end of the upright frame (10).

2. The air conditioning duct flange bolt synchronous tightening device according to claim 1, characterized in that, An L-shaped mounting plate (19) is fixedly installed on each of the mounting seats (12) located on the sliding frame (3). One end of the mounting plate (19) is fixedly connected to the mounting seat (12), and the other end is rotatably provided with a drive bevel gear (20). A driven bevel gear (21) is rotatably mounted on the mounting base (12). The driven bevel gear (21) is coaxially fixed with the sleeve column (13). The driving bevel gear (20) and the driven bevel gear (21) mesh. Multiple active bevel gears (20) are linked by a transmission rod (22). A transmission rod motor (23) is fixedly installed at the lower end of the support frame (10). The motor shaft of the transmission rod motor (23) is coaxially fixed with the transmission rod (22).

3. The air conditioning duct flange bolt synchronous tightening device according to claim 1, characterized in that, The length of the nut sleeve (15) is greater than the length of the bolt sleeve (14). A magnet is fixedly installed at one end of the nut sleeve (15) near the open end. A through hole is provided in the middle of the magnet. The diameter of the through hole is greater than the diameter of the bolt to be installed. A magnet is installed inside the bolt sleeve (14).

4. The air conditioning duct flange bolt synchronous tightening device according to claim 3, characterized in that, A screw (24) is rotatably installed in the middle of the base plate (1). The screw (24) is threadedly connected to the sliding frame (3). A transverse motor (25) is also fixedly installed in the middle of the base plate (1). The motor shaft of the transverse motor (25) is coaxially fixed with the screw (24).

5. The air conditioning duct flange bolt synchronous tightening device according to claim 4, characterized in that, A handle (26) is fixedly installed on the side of the base plate (1) away from the sliding frame (3) and the fixed frame (4). The handle (26) is equipped with two control switches, each of which controls the operation of the transverse motor (25) and the transmission rod motor (23).

6. The air conditioning duct flange bolt synchronous tightening device according to claim 1, characterized in that, The connecting frame (7) includes a fixing part fixedly disposed on one of the sliders (6), and a telescopic part is sleeved inside the fixing part. The telescopic part is fixedly connected to the other slider (6).

7. The air conditioning duct flange bolt synchronous tightening device according to claim 1, characterized in that, A scale line is provided at the lower part of the support frame (10), and pointers are fixedly provided on the two lifting bases (11) located below.

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