Flange plate bolt tightening device

Abstract

The flange plate bolt tightening device comprises an electric screwdriver body, a self-adaptive tool bit is arranged at the power output end of the electric screwdriver body, a cylindrical fixing cavity is formed in the top end of the self-adaptive tool bit, and a plurality of first fixing rods are slidably arranged on the side wall of the fixing cavity; the first fixing rod can be partially arranged in the fixing cavity or completely contained in the side wall of the self-adaptive tool bit due to sliding. A bolt fixing rod is arranged in the axial direction of the fixing cavity in a sliding mode, a plurality of second fixing rods are arranged on the side wall of the bolt fixing rod in a sliding mode, and the second fixing rods can be partially arranged in the fixing cavity or completely contained in the bolt fixing rod due to sliding. According to the flange plate bolt tightening device, by arranging the self-adaptive tool bit, the first fixing rod, the bolt fixing rod and the second fixing rod, bolts of different models and different sizes can be tightened through the flange plate bolt tightening device, the tool carrying amount of workers is reduced, and the labor burden of the workers is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bolt fastening equipment, and more specifically, relates to a flange bolt tightening device. Background Art

[0002] Flange is a disc-shaped part, mainly used to connect pipes, valves, pumps and other equipment in pipeline engineering. There are bolt holes on the flange, and two or more flanges are connected by bolts, and a sealing gasket is placed in the middle to ensure the sealing performance of the connection. Flange connection is a detachable connection method, which is widely used in various pipeline systems.

[0003] In order to ensure the sealing between the flanges, it is necessary to regularly inspect and maintain the flanges, and then tighten the loose bolts.

[0004] In actual operations, due to the different pipe network systems being inspected, different flanges will be used, so the sizes of the bolts that need to be tightened will also be different. In addition, the bolts for fixing the flanges will also be different, such as convex polygonal bolts and inner polygonal bolts. In order to complete the maintenance of the flanges, a large number of bolt tightening tools of different types need to be carried, which will greatly increase the labor burden of the staff in the field working environment. Summary of the invention

[0005] The purpose of the present invention is to provide a flange bolt tightening device to meet the needs of tightening different bolts, reduce the amount of tools that workers need to carry, and reduce the labor burden of workers.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a flange bolt tightening device, including an electric screwdriver body, an adaptive cutter head is provided at the power output end of the electric screwdriver body, a cylindrical fixed cavity is provided at the top end of the adaptive cutter head, a plurality of first fixed rods are slidably provided on the side wall of the fixed cavity, each of the first fixed rods is evenly arranged along the circumference of the fixed cavity, and the first fixed rod can be partially set in the fixed cavity or completely accommodated in the side wall of the adaptive cutter head due to sliding; a bolt fixing rod is slidably provided along the axial direction of the fixed cavity, a plurality of second fixing rods are slidably provided on the side wall of the bolt fixing rod, and the second fixing rods are evenly arranged along the circumference of the bolt fixing rod, and the second fixing rods can be partially set in the fixed cavity or completely accommodated in the bolt fixing rod due to sliding.

[0007] In a possible implementation, the adaptive cutter head is cylindrical, the fixed cavity is the inner cavity of the adaptive cutter head, a plurality of first sliding holes are provided on the adaptive cutter head, the first sliding holes are evenly arranged along the circumference of the adaptive cutter head, the first sliding holes correspond to the first fixing rods one by one, the first fixing rods are slidably arranged in the corresponding first sliding holes, a first limiting groove is provided on one side of the first sliding hole, the length of the first limiting groove is less than the length of the first sliding hole, a first limiting block is provided on one side of the first fixing rod, the first limiting block is slidably arranged in the first limiting groove, an end of the first limiting groove close to the center of the adaptive cutter head is arranged at intervals with an end of the first sliding hole close to the center of the adaptive cutter head, and an end of the first limiting groove away from the center of the adaptive cutter head is arranged on the outer side of an end of the first sliding hole away from the center of the adaptive cutter head; a first driving cavity is provided in the side wall of the adaptive cutter head, a first driving assembly is provided in the first driving cavity, the first driving cavity is communicated with the first sliding hole, and the first driving assembly is connected to each of the first fixing rods, and the first driving assembly is used to drive the first fixing rod to slide along the first sliding hole.

[0008] In a possible implementation, the first drive chamber is annular, and the first drive chamber is arranged on a side away from the center of the first sliding hole, the first drive chamber and the first sliding hole are arranged at intervals, the first drive chamber and the first sliding hole are connected to form a first power chamber through a first connecting hole, the diameter of the first connecting hole is smaller than the diameter of the first sliding hole, the first fixing rod is sealed against a side wall of the first sliding hole, and the side wall of the first limiting groove is sealed against the first limiting block, the first driving assembly includes hydraulic oil and a driving ring, the driving ring is slidingly and sealingly connected to the side wall of the first driving chamber, and the hydraulic oil is filled in the first power chamber between the driving ring and the first fixing rod.

[0009] In a possible implementation, a first through hole is provided at the top of the adaptive cutter head, the bolt fixing rod is arranged through the first through hole, a plurality of second sliding holes are provided at a position close to the bottom of the bolt fixing rod, the second sliding holes are arranged along the circumference of the bolt fixing rod, the second sliding holes correspond to the second fixing rods one by one, the second fixing rods are slidably arranged in the corresponding second sliding holes, a second limiting groove is provided on one side of the second sliding hole, the length of the second limiting groove is less than the length of the second sliding hole, a second limiting block is provided on one side of the second fixing rod, the second limiting block is slidably arranged in the second limiting groove, the outer end of the second limiting groove is spaced from the outer end of the second sliding hole, and the end of the second limiting groove away from the center of the bolt fixing rod is provided on the outer side of the end of the second sliding hole away from the center of the bolt fixing rod; a second driving cavity is provided in the bolt fixing rod, a second driving assembly is provided in the second driving cavity, the second driving cavity is communicated with the second sliding hole, and the second driving assembly is connected to each of the second fixing rods, and the second driving assembly is used to drive the second fixing rod to slide along the second sliding hole.

[0010] In a possible implementation, the second drive chamber is cylindrical and is arranged above the second sliding hole. The second drive chamber and the second sliding hole are connected to form a second power chamber through a second connecting hole. The diameter of the second connecting hole is smaller than the diameter of the second sliding hole. The second fixing rod is sealed against the side wall of the second sliding hole, and the side wall of the second limiting groove is sealed against the second limiting block. The second drive assembly includes hydraulic oil and a drive rod. The drive rod is slidingly and sealingly connected to the side wall of the first drive chamber, and the hydraulic oil is filled in the second power chamber between the drive rod and the second fixing rod.

[0011] In a possible implementation, the outer wall of the drive ring is screwed to the outer wall of the first drive cavity, and the inner wall of the drive ring is screwed to the inner wall of the first drive cavity, the pitch of the thread on the outer wall of the drive ring is the same as the pitch of the thread on the inner wall of the drive ring, a first connecting ring is rotatably provided at the top of the first drive cavity, a plurality of telescopic rods are fixedly provided at the bottom of the first connecting ring, the telescopic rods are evenly arranged along the circumference of the first connecting ring, a plurality of telescopic cylinders are provided at the top of the drive ring, the telescopic rods correspond to the telescopic cylinders one by one, and a part of the telescopic rod is inserted into the corresponding telescopic cylinder.

[0012] In a possible implementation, the bolt fixing rod is threaded in the first through hole, and a first locking groove is provided on the side wall of the driving rod, and the first locking groove extends along the axial direction of the driving rod; a second locking groove is provided on the inner wall of the second driving cavity, and the second locking groove extends along the axial direction of the second driving cavity; one end of the second locking groove is provided on the top end surface of the bolt fixing rod, and the second locking groove has the same shape as the cross-section of the first locking groove; the driving rod can rotate relative to the bolt fixing rod so that the first locking groove and the second locking groove are connected to form a first locking cavity; the cross-section of the first locking block is the same as the cross-section of the first locking cavity; the first locking block is inserted in the first locking cavity so that the driving rod and the bolt fixing rod are relatively fixed.

[0013] In a possible implementation, a plurality of connecting rods are provided on the top of the first connecting ring, and the connecting rods are evenly arranged along the circumference of the first connecting ring, the connecting rods are L-shaped, and a connecting tube is provided on the top of each connecting rod, the connecting tube is sleeved on the outer side of the bolt fixing rod, a third locking groove is provided on the side wall of the bolt fixing rod, and the third locking groove extends along the axial direction of the bolt fixing rod, and a fourth locking groove is provided on the inner wall of the connecting tube, and the fourth locking groove extends along the axial direction of the connecting tube, one end of the fourth locking groove is provided on the top end surface of the connecting tube, and the cross-section of the third locking groove and the fourth locking groove has the same shape, and the bolt fixing rod can be rotated relative to the connecting tube to make the third locking groove and the fourth locking groove connect to form a second locking cavity, and the cross-section of the second locking block is consistent with the second locking cavity The cross-sections of the two cams are the same, the second locking block is inserted in the second locking cavity so that the bolt fixing rod and the connecting cylinder are relatively fixed; the adaptive cutter head comprises a first adaptive cylinder, a second adaptive cylinder and an adaptive ring, the outer diameter of the second adaptive cylinder is smaller than the inner diameter of the first adaptive cylinder, the first adaptive cylinder and the second adaptive cylinder are coaxially arranged, the adaptive ring is connected to the bottom ends of the first adaptive cylinder and the second adaptive cylinder, the first sliding hole and the first connecting hole are arranged on the adaptive ring, the adaptive ring is provided with a connecting groove, the connecting groove is annular, the first sliding hole and the connecting groove are communicated through the first connecting hole, the gap between the connecting groove and the first adaptive cylinder and the second adaptive cylinder is communicated as a first driving cavity, and a second connecting ring is rotatably provided on the inner wall of the second adaptive cylinder, and the first through hole is the inner hole of the second connecting ring.

[0014] In a possible implementation, a fifth locking groove is provided on the inner wall of the second connecting ring, the fifth locking groove extends along the axial direction of the second connecting ring, one end of the fifth locking groove is provided on the top end surface of the second connecting ring, the fifth locking groove has the same shape as the cross-section of the third locking groove, the bolt fixing rod can rotate relative to the second connecting ring so that the third locking groove and the fifth locking groove are connected to form a third locking cavity, the cross-section of the first locking block is the same as the cross-section of the third locking cavity, the first locking block is inserted in the third locking cavity so that the driving rod and the bolt fixing rod are relatively fixed; a plurality of first fixing holes are provided on the top end surface of the second adaptable cylinder, and a plurality of second fixing holes are provided on the top end surface of the second connecting ring, the first fixing holes correspond to the second fixing holes one by one, and the two ends of the U-shaped locking block are respectively inserted in the corresponding first fixing hole and second fixing hole, so that the second connecting ring is relatively fixed relative to the second adaptable cylinder.

[0015] In a possible implementation, a gripping ring is provided on the outer wall of the first adaptable cylinder, a plurality of synapses are evenly provided on the outer wall of the gripping ring, a connecting head is provided at the top end of the driving rod, and the connecting head is connected to the electric screwdriver body.

[0016] The beneficial effects of the flange bolt tightening device provided by the present invention are as follows: compared with the prior art, the present invention provides an adaptive cutter head and a first fixing rod slidably arranged on the inner wall of the adaptive cutter head, and changes the length of the first fixing rod extending into the fixing cavity, thereby enabling the bolt fixing rod to fix convex polygonal bolts of different sizes; and provides a bolt fixing rod and a second fixing rod slidably arranged on the bolt fixing rod, so that internal polygonal bolts of different sizes can be fixed by changing the length of the second fixing rod extending into the fixing cavity, thereby enabling the flange bolt tightening device of the present invention to tighten bolts of different models and sizes, reducing the amount of tools carried by the staff and greatly reducing the labor burden of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of the flange bolt tightening device provided by an embodiment of the present invention when in operation; Figure 2 A schematic diagram of the structure of an adaptive cutter head provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a driving rod provided in an embodiment of the present invention that can adjust the relative position of the adaptive cutter head and the bolt fixing rod; Figure 4 for Figure 3 A magnified view of part A; Figure 5 A schematic diagram of the structure of the drive rod provided by the embodiment of the present invention when the relative position of the bolt fixing rod and the drive rod is adjustable; Figure 6 for Figure 5 A magnified view of part B; Figure 7 A schematic diagram of the structure of a driving rod provided in an embodiment of the present invention that can drive a first driving assembly; Figure 8 A cross-sectional view of an adaptive cutter head in an initial state provided by an embodiment of the present invention; Fig. 9 A cross-sectional view of an adaptive cutter head provided by an embodiment of the present invention when fixing an external polygonal bolt; Fig.10 for Fig. 9 Enlarged view of part C; Fig.11 A cross-sectional view of an adaptive cutter head fixing an inner polygonal bolt is provided for an embodiment of the present invention; Fig.12 for Fig.11 Enlarged view of part D.

[0019] Among them, the reference numerals in the figures are as follows: 1. Electric screwdriver body; 2. Adaptive cutter head; 3. Bolt fixing rod; 201, fixing cavity; 202, first fixing rod; 203, first sliding hole; 204, first limiting groove; 205, first limiting block; 206, first connecting hole; 207, driving ring; 208, first driving cavity; 209, first connecting ring; 210, telescopic rod; 211, telescopic cylinder; 212, first locking block; 213, connecting rod; 214, connecting cylinder; 215, fourth locking groove; 216, first adapting cylinder; 217, second adapting cylinder; 218, adapting ring; 219, connecting groove; 220, second connecting ring; 221, fifth locking groove; 222, first fixing hole; 223, second fixing hole; 224, U-shaped locking block; 225, holding ring; 301, second fixing rod; 302, second sliding hole; 303, second limiting groove; 304, second limiting block; 305, second driving cavity; 306, second connecting hole; 307, driving rod; 308, first locking groove; 309, second locking groove; 310, third locking groove; 311, second locking block; 312, connecting head. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0022] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] The directions or positional relationships indicated by terms such as “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0025] The flange bolt tightening device provided by the present invention is now described.

[0026] Please also read Figure 1 , Figure 2 and Figure 8The flange bolt tightening device includes an electric screwdriver body 1, an adaptive cutter head 2 is provided at the power output end of the electric screwdriver body 1, a cylindrical fixed cavity 201 is provided at the top of the adaptive cutter head 2, a plurality of first fixed rods 202 are slidably provided on the side wall of the fixed cavity 201, each first fixed rod 202 is evenly arranged along the circumference of the fixed cavity 201, and the first fixed rod 202 can be partially set in the fixed cavity 201 or completely received in the side wall of the adaptive cutter head 2 due to sliding; a bolt fixing rod 3 is slidably provided along the axial direction of the fixed cavity 201, a plurality of second fixed rods 301 are slidably provided on the side wall of the bolt fixing rod 3, and the second fixed rods 301 are evenly arranged along the circumference of the bolt fixing rod 3, and the second fixed rods 301 can be partially set in the fixed cavity 201 or completely received in the bolt fixing rod 3 due to sliding.

[0027] The flange bolt tightening device provided in the present embodiment has the following beneficial effects: compared with the prior art, the flange bolt tightening device provided in the present embodiment provides an adaptive cutter head 2 and a first fixing rod 202 slidably provided on the inner wall of the adaptive cutter head 2, and changes the length of the first fixing rod 202 extending into the fixing cavity 201, thereby enabling the bolt fixing rod 3 to fix convex polygonal bolts of different sizes; and provides a bolt fixing rod 3 and a second fixing rod 301 slidably provided on the bolt fixing rod 3, thereby enabling internal polygonal bolts of different sizes to be fixed by changing the length of the second fixing rod 301 extending into the fixing cavity 201, thereby enabling the flange bolt tightening device of the present invention to tighten bolts of different models and sizes, thereby reducing the amount of tools carried by the staff and greatly reducing the labor burden of the staff.

[0028] like Figure 2 , Fig. 9 and Fig.10As shown, the adaptive cutter head 2 is cylindrical, the fixed cavity 201 is the inner cavity of the adaptive cutter head 2, and a plurality of first sliding holes 203 are provided on the adaptive cutter head 2. The first sliding holes 203 are evenly arranged along the circumference of the adaptive cutter head 2. The first sliding holes 203 correspond to the first fixing rods 202 one by one. The first fixing rods 202 are slidably arranged in the corresponding first sliding holes 203. A first limiting groove 204 is provided on one side of the first sliding hole 203. The length of the first limiting groove 204 is less than the length of the first sliding hole 203. A first limiting block 205 is provided on one side of the first fixing rod 202. The first limiting block 205 is slidably arranged in the first limiting groove 204. The first One end of the limiting groove 204 close to the center of the adaptive cutter head 2 is spaced apart from one end of the first sliding hole 203 close to the center of the adaptive cutter head 2, and one end of the first limiting groove 204 away from the center of the adaptive cutter head 2 is arranged on the outside of one end of the first sliding hole 203 away from the center of the adaptive cutter head 2; a first driving cavity 208 is provided in the side wall of the adaptive cutter head 2, a first driving assembly is provided in the first driving cavity 208, the first driving cavity 208 is communicated with the first sliding hole 203, and the first driving assembly is connected to each first fixed rod 202, and the first driving assembly is used to drive the first fixed rod 202 to slide along the first sliding hole 203.

[0029] The first limiting groove 204 is provided so that when the first fixing rod 202 slides outward and moves to the outermost side, the first limiting block 205 cooperates with the first limiting groove 204 to prevent the first fixing rod 202 from being separated from the first sliding hole 203. The first connecting hole 206 is provided to prevent the first fixing rod 202 from entering the first driving cavity 208.

[0030] Specifically, in this embodiment, the first drive chamber 208 is annular, and the first drive chamber 208 is arranged on a side away from the center of the first sliding hole 203. The first drive chamber 208 and the first sliding hole 203 are arranged at intervals. The first drive chamber 208 and the first sliding hole 203 are connected to form a first power chamber through the first connecting hole 206. The diameter of the first connecting hole 206 is smaller than the diameter of the first sliding hole 203. The first fixed rod 202 is sealed with the side wall of the first sliding hole 203, and the side wall of the first limiting groove 204 is sealed with the first limiting block 205. The first drive assembly includes hydraulic oil and a drive ring 207. The drive ring 207 is slidably sealed and connected with the side wall of the first drive chamber 208. The hydraulic oil is filled in the first power chamber between the drive ring 207 and the first fixed rod 202. When the first fixed rod 202 needs to slide, it is only necessary to move the drive ring 207. When the drive ring 207 moves downward, the hydraulic oil will push the first fixed rod 202 to move toward the center of the adaptive cutter head 2, and a smaller convex polygonal bolt can be fixed at this time. When the driving ring 207 moves upward, the hydraulic oil will pull the first fixing rod 202 away from the center of the adaptive cutter head 2, and a larger convex polygonal bolt can be fixed at this time.

[0031] like Fig.11and Fig.12 As shown, a first through hole is provided on the top of the adaptive cutter head 2, and the bolt fixing rod 3 is arranged through the first through hole. A plurality of second sliding holes 302 are provided at a position near the bottom of the bolt fixing rod 3. The second sliding holes 302 are arranged along the circumference of the bolt fixing rod 3. The second sliding holes 302 correspond to the second fixing rods 301 one by one. The second fixing rods 301 are slidably arranged in the corresponding second sliding holes 302. A second limiting groove 303 is provided on one side of the second sliding hole 302. The length of the second limiting groove 303 is less than the length of the second sliding hole 302. A second limiting block 304 is provided on one side of the second fixing rod 301. The second limiting block 304 is slidably arranged in the second limiting groove 303, the outer end of the second limiting groove 303 is spaced from the outer end of the second sliding hole 302, and the end of the second limiting groove 303 away from the center of the bolt fixing rod 3 is arranged on the outer side of the end of the second sliding hole 302 away from the center of the bolt fixing rod 3; a second driving cavity 305 is provided in the bolt fixing rod 3, and a second driving component is provided in the second driving cavity 305, the second driving cavity 305 is communicated with the second sliding hole 302, and the second driving component is connected to each second fixing rod 301, and the second driving component is used to drive the second fixing rod 301 to slide along the second sliding hole 302.

[0032] The second limiting groove 303 is provided so that when the second fixing rod 301 slides outward and moves to the outermost side, the second limiting block 304 cooperates with the second limiting groove 303 to prevent the second fixing rod 301 from being separated from the second sliding hole 302. The second connecting hole 306 is provided to prevent the second fixing rod 301 from entering the second driving cavity 305.

[0033] Specifically, the second drive chamber 305 is cylindrical, and the second drive chamber 305 is arranged above the second sliding hole 302. The second drive chamber 305 and the second sliding hole 302 are connected to form a second power chamber through the second connecting hole 306. The diameter of the second connecting hole 306 is smaller than the diameter of the second sliding hole 302. The second fixed rod 301 is sealed with the side wall of the second sliding hole 302, and the side wall of the second limiting groove 303 is sealed with the second limiting block 304. The second drive assembly includes hydraulic oil and a drive rod 307. The drive rod 307 is slidingly and sealingly connected to the side wall of the first drive chamber 208, and the hydraulic oil is filled in the second power chamber between the drive rod 307 and the second fixed rod 301.

[0034] When the second fixing rod 301 needs to slide, it is only necessary to move the driving rod 307. When the driving rod 307 moves downward, the hydraulic oil will push the second fixing rod 301 away from the center of the bolt fixing rod 3. At this time, a larger inner polygonal bolt can be fixed. When the driving rod 307 moves upward, the hydraulic oil will pull the second fixing rod 301 toward the center of the adaptive cutter head 2. At this time, a larger inner polygonal bolt can be fixed. At the same time, the bolt fixing rod 3 can move. When it is necessary to tighten the convex polygonal bolt, the bolt fixing rod 3 moves upward to provide a fixing space for the bolt. When it is necessary to tighten the inner polygonal bolt, the bolt fixing rod 3 moves downward and is inserted into the hole of the nut of the inner polygonal bolt.

[0035] In a possible implementation, the outer wall of the drive ring 207 is screwed to the outer wall of the first drive cavity 208, and the inner wall of the drive ring 207 is screwed to the inner wall of the first drive cavity 208, the pitch of the thread on the outer wall of the drive ring 207 is the same as the pitch of the thread on the inner wall of the drive ring 207, the top of the first drive cavity 208 is rotatably provided with a first connecting ring 209, the bottom of the first connecting ring 209 is fixedly provided with a plurality of telescopic rods 210, the telescopic rods 210 are evenly arranged along the circumference of the first connecting ring 209, the top of the drive ring 207 is provided with a plurality of telescopic cylinders 211, the telescopic cylinders 211 are evenly arranged along the circumference of the drive ring 207, the telescopic rods 210 correspond to the telescopic cylinders 211 one by one, and a part of the telescopic rod 210 is inserted into the corresponding telescopic cylinder 211.

[0036] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the bolt fixing rod 3 is screwed in the first through hole, and a first locking groove 308 is provided on the side wall of the driving rod 307, and the first locking groove 308 extends along the axial direction of the driving rod 307. A second locking groove 309 is provided on the inner wall of the second driving cavity 305, and the second locking groove 309 extends along the axial direction of the second driving cavity 305. One end of the second locking groove 309 is provided on the top end surface of the bolt fixing rod 3, and the second locking groove 309 has the same shape as the cross-section of the first locking groove 308. The driving rod 307 can rotate relative to the bolt fixing rod 3 to make the first locking groove 308 and the second locking groove 309 connected to form a first locking cavity. The cross-section of the first locking block 212 is the same as the cross-section of the first locking cavity, and the first locking block 212 is inserted in the first locking cavity to make the driving rod 307 relatively fixed to the bolt fixing rod 3.

[0037] A plurality of connecting rods 213 are provided on the top of the first connecting ring 209, and the connecting rods 213 are evenly arranged along the circumference of the first connecting ring 209. The connecting rods 213 are L-shaped, and a connecting tube 214 is provided on the top of each connecting rod 213. The connecting tube 214 is sleeved on the outer side of the bolt fixing rod 3, and a third locking groove 310 is provided on the side wall of the bolt fixing rod 3. The third locking groove 310 extends along the axial direction of the bolt fixing rod 3, and a fourth locking groove 215 is provided on the inner wall of the connecting tube 214. The fourth locking groove 215 extends along the axial direction of the connecting tube 214, and one end of the fourth locking groove 215 is provided on the top end surface of the connecting tube 214. The cross-section of the third locking groove 310 is the same as that of the fourth locking groove 215. The bolt fixing rod 3 can be rotated relative to the connecting tube 214 to make the third locking groove 310 and the fourth locking groove 215 connected to form a second locking cavity. The cross-section of the second locking block 311 is the same as that of the second locking cavity. The block 311 is inserted into the second locking cavity so that the bolt fixing rod 3 and the connecting cylinder 214 are relatively fixed; the adaptive cutter head 2 includes a first adaptive cylinder 216, a second adaptive cylinder 217 and an adaptive ring 218, the outer diameter of the second adaptive cylinder 217 is smaller than the inner diameter of the first adaptive cylinder 216, the first adaptive cylinder 216 and the second adaptive cylinder 217 are coaxially arranged, the adaptive ring 218 is connected to the bottom ends of the first adaptive cylinder 216 and the second adaptive cylinder 217, the first sliding hole 203 and the first connecting hole 206 are arranged on the adaptive ring 218, and the adaptive ring 218 is provided with a connecting groove 219, and the connecting groove 219 is annular, the first sliding hole 203 and the connecting groove 219 are connected through the first connecting hole 206, and the gap between the connecting groove 219 and the first adaptive cylinder 216 and the second adaptive cylinder 217 is connected to the first driving cavity 208, and a second connecting ring 220 is rotatably provided on the inner wall of the second adaptive cylinder 217, and the first through hole is the inner hole of the second connecting ring 220.

[0038] A fifth locking groove 221 is provided on the inner wall of the second connecting ring 220. The fifth locking groove 221 extends along the axial direction of the second connecting ring 220. One end of the fifth locking groove 221 is provided on the top end surface of the second connecting ring 220. The fifth locking groove 221 has the same shape as the cross section of the third locking groove 310. The bolt fixing rod 3 can be rotated relative to the second connecting ring 220 so that the third locking groove 310 and the fifth locking groove 221 are connected to form a third locking cavity. The cross section of the first locking block 212 is the same as the cross section of the third locking cavity. A locking block 212 is inserted in the third locking cavity to relatively fix the driving rod 307 and the bolt fixing rod 3; a plurality of first fixing holes 222 are provided on the top end surface of the second adaptation cylinder 217, and a plurality of second fixing holes 223 are provided on the top end surface of the second connecting ring 220, and the first fixing holes 222 correspond to the second fixing holes 223 one by one, and the two ends of the U-shaped locking block 224 are respectively inserted in the corresponding first fixing holes 222 and second fixing holes 223, so that the second connecting ring 220 is relatively fixed relative to the second adaptation cylinder 217.

[0039] During actual use, the driving rod 307 is first fixed relatively to the bolt fixing rod 3, the bolt fixing rod 3 is fixed to the second connecting ring 220, and the bolt fixing rod 3 is fixed to the connecting cylinder 214. Then, the first adaptation cylinder 216 is held. When the electric screwdriver body 1 drives the driving rod 307 to rotate and cannot rotate, it will drive the first connecting ring 209 to rotate. The first connecting ring 209 drives the driving ring 207 to rotate, thereby driving the first fixing rod 202.

[0040] In addition, first fix the driving rod 307 to the bolt fixing rod 3, fix the second connecting ring 220 to the second adaptive cylinder 217 relatively, and then hold the first adaptive cylinder 216. When the electric screwdriver drives the driving rod 307 to rotate, the length of the bolt driving rod 307 extending into the adaptive tool head 2 will be adjusted.

[0041] At the same time, the bolt fixing rod 3 is first fixed to the second connecting ring 220, and the second connecting ring 220 is fixed to the second adapting cylinder 217, and then the first adapting cylinder 216 is held, and when the electric screwdriver drives the driving rod 307 to rotate, the driving rod 307 will move up and down along the second driving cavity 305 to drive the second fixing rod 301. The above arrangement enables one electric screwdriver to drive multiple components.

[0042] Finally, a gripping ring 225 is provided on the outer wall of the first adaptive cylinder 216, and a plurality of synapses are evenly provided on the outer wall of the gripping ring 225. A connector 312 is provided at the top of the driving rod 307, and the connector 312 is connected to the electric screwdriver body 1. The provision of the gripping ring 225 makes the adaptive cutter head 2 easier to hold.

[0043] In this embodiment, the inner polygonal bolts include various bolts such as inner hexagonal bolts and inner triangle bolts; the outer polygonal bolts include various bolts with hexagonal, octagonal and rectangular bolt heads.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flange bolt tightening device, characterized in that: The invention comprises an electric screwdriver body (1), wherein an adaptive cutter head (2) is provided at a power output end of the electric screwdriver body (1), a cylindrical fixed cavity (201) is provided at the top end of the adaptive cutter head (2), a plurality of first fixed rods (202) are slidably provided on the side wall of the fixed cavity (201), each of the first fixed rods (202) is evenly arranged along the circumference of the fixed cavity (201), and the first fixed rods (202) can be partially arranged in the fixed cavity (201) or completely accommodated in the side wall of the adaptive cutter head (2) due to sliding; a bolt fixed rod (3) is slidably provided along the axial direction of the fixed cavity (201), a plurality of second fixed rods (301) are slidably provided on the side wall of the bolt fixed rod (3), the second fixed rods (301) are evenly arranged along the circumference of the bolt fixed rod (3), and the second fixed rods (301) can be partially arranged in the fixed cavity (201) or completely accommodated in the bolt fixed rod (3) due to sliding.

2. The flange bolt tightening device according to claim 1, characterized in that: The adaptive cutter head (2) is cylindrical, the fixed cavity (201) is the inner cavity of the adaptive cutter head (2), a plurality of first sliding holes (203) are provided on the adaptive cutter head (2), the first sliding holes (203) are evenly arranged along the circumference of the adaptive cutter head (2), the first sliding holes (203) correspond to the first fixing rods (202) one by one, the first fixing rods (202) are slidably arranged in the corresponding first sliding holes (203), a first limiting groove (204) is provided on one side of the first sliding hole (203), the length of the first limiting groove (204) is less than the length of the first sliding hole (203), a first limiting block (205) is provided on one side of the first fixing rod (202), the first limiting block (205) is slidably arranged in the first limiting groove (204) The first limit groove (204) is provided with a first driving assembly (208) in the side wall of the adaptive cutter head (2), the first driving assembly (208) is provided with a first driving cavity (208), the first driving cavity (208) is communicated with the first sliding hole (203), and the first driving assembly is connected with each of the first fixing rods (202), and the first driving assembly is used to drive the first fixing rods (202) to slide along the first sliding hole (203).

3. The flange bolt tightening device according to claim 2, characterized in that: The first drive chamber (208) is annular and is arranged on a side of the first sliding hole (203) away from the center. The first drive chamber (208) and the first sliding hole (203) are arranged at intervals. The first drive chamber (208) and the first sliding hole (203) are connected to form a first power chamber through a first connecting hole (206). The diameter of the first connecting hole (206) is smaller than the diameter of the first sliding hole (203). The first fixing rod (202) and the side wall of the first sliding hole (203) are sealed, and the side wall of the first limiting groove (204) and the first limiting block (205) are sealed. The first drive assembly comprises hydraulic oil and a drive ring (207). The drive ring (207) is slidably sealedly connected to the side wall of the first drive chamber (208). The hydraulic oil is filled in the first power chamber between the drive ring (207) and the first fixing rod (202).

4. The flange bolt tightening device according to claim 3, characterized in that: The adaptive cutter head (2) is provided with a first through hole at the top, the bolt fixing rod (3) is arranged through the first through hole, a plurality of second sliding holes (302) are provided near the bottom of the bolt fixing rod (3), the second sliding holes (302) are arranged along the circumference of the bolt fixing rod (3), the second sliding holes (302) correspond to the second fixing rods (301) one by one, the second fixing rods (301) are slidably arranged in the corresponding second sliding holes (302), a second limiting groove (303) is provided on one side of the second sliding hole (302), the length of the second limiting groove (303) is less than the length of the second sliding hole (302), a second limiting block (304) is provided on one side of the second fixing rod (301), the second limiting block (304) is provided on one side of the second fixing rod (301), 4) slidingly arranged in the second limiting groove (303), the outer end of the second limiting groove (303) and the outer end of the second sliding hole (302) are arranged at a distance, and the end of the second limiting groove (303) away from the center of the bolt fixing rod (3) is arranged on the outer side of the end of the second sliding hole (302) away from the center of the bolt fixing rod (3); a second driving cavity (305) is arranged in the bolt fixing rod (3), and a second driving component is arranged in the second driving cavity (305), the second driving cavity (305) is communicated with the second sliding hole (302), and the second driving component is connected to each of the second fixing rods (301), and the second driving component is used to drive the second fixing rod (301) to slide along the second sliding hole (302).

5. The flange bolt tightening device according to claim 4, characterized in that: The second drive chamber (305) is cylindrical and is arranged above the second sliding hole (302). The second drive chamber (305) and the second sliding hole (302) are connected to form a second power chamber via a second connecting hole (306). The diameter of the second connecting hole (306) is smaller than the diameter of the second sliding hole (302). The second fixing rod (301) and the side wall of the second sliding hole (302) are sealed, and the side wall of the second limiting groove (303) and the second limiting block (304) are sealed. The second drive assembly comprises hydraulic oil and a drive rod (307). The drive rod (307) is slidably and sealingly connected to the side wall of the second drive chamber (305). The hydraulic oil is filled in the second power chamber between the drive rod (307) and the second fixing rod (301).

6. The flange bolt tightening device according to claim 5, characterized in that: The outer wall of the drive ring (207) is screwed to the outer wall of the first drive cavity (208), and the inner wall of the drive ring (207) is screwed to the inner wall of the first drive cavity (208); the pitch of the thread on the outer wall of the drive ring (207) is the same as the pitch of the thread on the inner wall of the drive ring (207); a first connecting ring (209) is rotatably provided at the top of the first drive cavity (208); a plurality of telescopic rods (210) are fixedly provided at the bottom of the first connecting ring (209); the telescopic rods (210) are evenly arranged along the circumference of the first connecting ring (209); a plurality of telescopic cylinders (211) are provided at the top of the drive ring (207); the telescopic cylinders (211) are evenly arranged along the circumference of the drive ring (207); the telescopic rods (210) correspond to the telescopic cylinders (211) one by one, and a part of the telescopic rod (210) is inserted into the corresponding telescopic cylinder (211).

7. The flange bolt tightening device according to claim 6, characterized in that: The bolt fixing rod (3) is screwed into the first through hole, a first locking groove (308) is provided on the side wall of the driving rod (307), and the first locking groove (308) extends along the axial direction of the driving rod (307), a second locking groove (309) is provided on the inner wall of the second driving cavity (305), and the second locking groove (309) extends along the axial direction of the second driving cavity (305), one end of the second locking groove (309) is provided on the top end surface of the bolt fixing rod (3), and the second The locking groove (309) has the same cross-sectional shape as the first locking groove (308); the driving rod (307) can rotate relative to the bolt fixing rod (3) so that the first locking groove (308) and the second locking groove (309) are connected to form a first locking cavity; the cross-sectional shape of the first locking block (212) is the same as the cross-sectional shape of the first locking cavity; the first locking block (212) is inserted into the first locking cavity so that the driving rod (307) and the bolt fixing rod (3) are relatively fixed.

8. The flange bolt tightening device according to claim 7, characterized in that: A plurality of connecting rods (213) are provided at the top of the first connecting ring (209), the connecting rods (213) are evenly arranged along the circumference of the first connecting ring (209), the connecting rods (213) are L-shaped, and a connecting tube (214) is provided at the top of each connecting rod (213), the connecting tube (214) is sleeved on the outside of the bolt fixing rod (3), a third locking groove (310) is provided on the side wall of the bolt fixing rod (3), the third locking groove (310) extends along the axial direction of the bolt fixing rod (3), and a fourth locking groove (310) is provided on the inner wall of the connecting tube (214). 215), the fourth locking groove (215) extends along the axial direction of the connecting tube (214), one end of the fourth locking groove (215) is arranged on the top end surface of the connecting tube (214), the third locking groove (310) and the fourth locking groove (215) have the same cross-sectional shape, the bolt fixing rod (3) can be rotated relative to the connecting tube (214) so ​​that the third locking groove (310) and the fourth locking groove (215) are connected to form a second locking cavity, the cross-sectional shape of the second locking block (311) is the same as the cross-sectional shape of the second locking cavity, and the second locking block (311) The adaptable cutter head (2) comprises a first adaptable tube (216), a second adaptable tube (217) and an adaptable ring (218), wherein the outer diameter of the second adaptable tube (217) is smaller than the inner diameter of the first adaptable tube (216), the first adaptable tube (216) and the second adaptable tube (217) are coaxially arranged, the adaptable ring (218) is connected to the bottom ends of the first adaptable tube (216) and the second adaptable tube (217), the first sliding hole (203) and the first connecting tube (214) are connected to each other. The connecting hole (206) is provided on the adapting ring (218), and a connecting groove (219) is provided on the adapting ring (218). The connecting groove (219) is annular in shape. The first sliding hole (203) and the connecting groove (219) are connected through the first connecting hole (206). The connecting groove (219) and the gap between the first adapting cylinder (216) and the second adapting cylinder (217) are connected to form a first driving cavity (208). A second connecting ring (220) is rotatably provided on the inner wall of the second adapting cylinder (217), and the first through hole is the inner hole of the second connecting ring (220).

9. The flange bolt tightening device according to claim 8, characterized in that: A fifth locking groove (221) is provided on the inner wall of the second connecting ring (220), the fifth locking groove (221) extending along the axial direction of the second connecting ring (220), one end of the fifth locking groove (221) being provided on the top end surface of the second connecting ring (220), the cross-section of the fifth locking groove (221) being the same as that of the third locking groove (310), the bolt fixing rod (3) being able to rotate relative to the second connecting ring (220) so that the third locking groove (310) and the fifth locking groove (221) are connected to form a third locking cavity, the cross-section of the first locking block (212) being the same as that of the third locking cavity, the first locking block (212) being inserted into the third locking cavity so that the driving rod (307) and the bolt fixing rod (3) are relatively fixed; A plurality of first fixing holes (222) are provided on the top end surface of the second adaptable cylinder (217), and a plurality of second fixing holes (223) are provided on the top end surface of the second connecting ring (220). The first fixing holes (222) correspond to the second fixing holes (223) one by one, and the two ends of the U-shaped locking block (224) are respectively inserted into the corresponding first fixing holes (222) and the second fixing holes (223), so that the second connecting ring (220) is relatively fixed relative to the second adaptable cylinder (217).

10. The flange bolt tightening device according to claim 9, characterized in that: A gripping ring (225) is provided on the outer wall of the first adaptable cylinder (216), and a plurality of synapses are evenly provided on the outer wall of the gripping ring (225). A connecting head (312) is provided at the top end of the driving rod (307), and the connecting head (312) is connected to the electric screwdriver body (1).

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