Wrench clamping mechanism and torque wrench for fastening power transmission tower cylinder bolt

Abstract

The invention belongs to the technical field of power grid power transmission tower bolt fastening and later maintenance, and particularly discloses a wrench clamping mechanism and a torque wrench used for power transmission tower bolt fastening, the wrench clamping mechanism comprises a flange fixing part, a screw rod piece and a clamping assembly, bolts clamped by the clamping assembly serve as references, namely the axial direction and the radial direction, and the screw rod piece is clamped by the clamping assembly. A clamping assembly is installed on one end face of the flange fixing part. The screw rods on the screw rod piece are adopted to jointly drive the multiple flange clamping rods to move relative to the vertical center line, so that the distance between the multiple flange clamping rods and the vertical center line is changed, that is, the multiple flange clamping rods are driven by the screw rod piece to be tightened or opened, and therefore bolts with different diameters can be clamped; a sleeve mode used in the prior art is replaced, the scheme is suitable for bolts with different diameters, the bolt head does not need to be frequently replaced, the bolt can be fastened or disassembled, and the work efficiency of bolt fastening in the aloft work is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of power grid transmission tower bolt tightening and subsequent maintenance, and particularly relates to a wrench clamping mechanism and a torque wrench for tightening transmission tower bolts. Background Art

[0002] Transmission lines are the main components of the power system, and transmission lines are erected by transmission towers. The transmission towers are mainly composed of bolt-fastened profiles. The acceptance quality and subsequent maintenance of the bolts connecting the profiles are crucial to the stable operation of the power system.

[0003] Maintenance of the bolts mentioned above requires a special wrench, namely a torque wrench, which can be set according to the position of the bolts on the profiles, and can largely tighten or replace the bolts at different positions on the transmission tower frame;

[0004] However, the torque wrenches currently used have a sleeve installed on their clamping part, which is used to tighten or replace the bolts on the transmission tower frame. However, the bolts on the transmission tower frame have different diameters, and various sleeves that match the bolt diameters are required to perform the tightening or replacement operations. This will cause the following problems:

[0005] 1. When dealing with bolts of different diameters, it is necessary to frequently replace the sleeve that matches the bolt specifications, resulting in long service time and low efficiency;

[0006] Second, the socket is usually installed on one side of the end of the wrench. For the bolt position on the transmission tower frame, the wrench cannot be used due to the position of the bolt. Due to factors such as the narrow space, the wrench cannot be rotated, resulting in the inability to replace or tighten the bolt. Summary of the Invention

[0007] In response to the above problems, the present invention provides a wrench clamping mechanism and a torque wrench for tightening transmission tower bolts, which is intended to replace the socket. Only the clamping mechanism needs to be adjusted to match bolts of different diameters, thereby better completing replacement or maintenance tasks. In addition, the wrench is designed with two connecting parts that are symmetrical with respect to the width direction of the torque sensor, and the connecting parts and the wrench clamping structure adopt a detachable connection method. Therefore, the wrench clamping structure and the torque sensor can be disassembled or installed according to the actual scenario, thereby avoiding the situation where the wrench cannot be rotated, and the bolts cannot be replaced or tightened due to factors such as limited space.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0009] A wrench clamping mechanism comprises a flange fixing portion, a screw member and a clamping assembly, with the bolt clamped by the clamping assembly as a reference, that is, the axial direction and the radial direction, one end face of the flange fixing portion is installed with the clamping assembly, the clamping assembly comprises a fixing block and a plurality of flange clamping rods, the flange fixing portion is sleeved on the outside of the fixing block, the plurality of flange clamping rods are arranged along the bottom of the fixing block and are symmetrically distributed along the radial direction of the flange fixing portion, the flange fixing portion is threadedly sleeved on the screw member in the vertical direction, the bottom of the screw member extends through the flange fixing portion and is threadedly engaged with the plurality of flange clamping rods; the flange fixing portion and the screw member undergo relative movement in the vertical direction, so that the plurality of flange clamping rods respectively engage with the screw member threads and approach or move away from each other in the vertical direction, thereby causing the flange clamping rods to clamp or loosen the bolt;

[0010] The fixing block is sleeved on the screw member in the axial direction, and the fixing block and the screw member are locked together by a screw. As the screw member rotates in the flange fixing part, the fixing block and the clamping assembly rotate, so that the flange clamping rod can loosen or tighten the bolt after clamping the bolt.

[0011] Preferably, the screw member comprises a screw and a fixing seat, and the screw member is fixed to the fixing seat along the axial direction;

[0012] The screw is provided with a smooth section along the axial direction, and the smooth section is fixed to the fixing seat along the axial direction and extends into the installation chamber along the vertical direction; the smooth section corresponds to the fixing block along the axial direction, and the fixing block and the smooth section are locked together by a screw. As the smooth section rotates in the flange fixing part, the fixing block and the clamping assembly are rotated, so that the flange clamping rod can loosen or tighten the bolt after clamping the bolt.

[0013] Preferably, the screw further includes a threaded section, which is fixedly connected to the smooth section along the axial direction. Each of the flange clamping rods includes a four-bar linkage and a clamping plate. One of the rods in the four-bar linkage extends in its own direction and has a gear at one end, the gear meshes with the threaded section. The top of another rod in the four-bar linkage is fixed to the bottom surface of the flange fixing portion, and the third rod of the four-bar linkage is hinged to the clamping plate.

[0014] The gears on the four flange clamping rods are engaged with the threaded section together, and the four gears are arranged in sequence along the radial direction of the screw member.

[0015] Preferably, the clamping plate has a bent clamping portion, the bent clamping portion is parallel to the vertical surface, and several of the bent clamping portions correspond to the circumferential surface of the bolt.

[0016] Preferably, the bent clamping portion is provided with an anti-slip gasket along the vertical direction, and the anti-slip gasket is in contact with the circumferential surface of the bolt.

[0017] Preferably, the wrench clamping mechanism also includes a flange mounting portion, which has an installation chamber inside; a spring is vertically sleeved inside the fixing seat, and the spring extends out of the fixing seat along its own direction, and the fixing seat extends into the installation chamber from the bottom of the flange mounting seat along the vertical direction, so that the top of the spring contacts the inner top side wall of the installation chamber, and the flange fixing portion is rotatably sleeved on the bottom of the flange mounting portion.

[0018] Preferably, a limiting shell component is threadedly sleeved on the outer side wall of the flange fixing portion, and the limiting shell component is located on the outer side of the clamping plate.

[0019] Preferably, the limit shell assembly includes a connecting head, a truncated cone limit seat and several limit shells, the connecting head is fixed on the top of the truncated cone limit seat, the upper end of the connecting head is fixedly sleeved on the outside of the flange fixing part in the vertical direction, and several limit shells are arranged along the circumference of the truncated cone limit seat, a through hole is opened on the truncated cone limit seat, and each limit shell extends in the vertical direction, the limit shell is located on the outside of the clamping plate, and there is a gap between each two adjacent limit shells, and each gap corresponds to a through hole.

[0020] Preferably, each of the limiting shells includes a plurality of limiting arc blocks, and the plurality of limiting arc blocks are sequentially connected end to end along the vertical direction, and the radius of each two adjacent limiting arc blocks decreases sequentially.

[0021] Furthermore, the number of limiting arc blocks is four, and the shape of the through hole is a "cross" structure. The gap between each two adjacent limiting arc blocks corresponds to the through hole of the "cross" structure, and each flange clamping rod enters the limiting shell through the through hole of the "cross" structure and corresponds to the side wall of the limiting shell in the vertical direction.

[0022] A torque wrench for tightening transmission tower bolts comprises the above-mentioned wrench clamping mechanism.

[0023] Preferably, the torque wrench further comprises a housing and a torque sensor, wherein the housing has a length direction and a width direction, the width direction of the housing is parallel to the vertical direction, and the torque sensors are sequentially arranged along the length direction of the housing;

[0024] The torque sensor includes a torque sensor housing and two first rotating shafts. The two first rotating shafts are respectively rotatably sleeved on the torque sensor housing along the width direction, and one of the first rotating shafts is connected to the wrench clamping mechanism.

[0025] Preferably, the torque wrench further comprises a torque multiplier and a driving mechanism, wherein the driving mechanism and the torque multiplier are mounted in the housing along the length direction, and the torque multiplier is mounted in the middle position between the driving mechanism and the torque sensor;

[0026] The free end of the torque multiplier is connected to the free end of the torque sensor arranged along the horizontal direction thereof, and the free end of the torque sensor and the first rotating shaft are jointly sleeved with a bevel gear set;

[0027] The driving mechanism is used to drive the free end of the torque multiplier to rotate, thereby driving the free end of the torque sensor to rotate, and then driving the bevel gear set to change direction and rotate, and finally rotating the first shaft, thereby rotating the clamping mechanism.

[0028] Furthermore, the torque multiplier is provided with a second rotating shaft, the torque sensor is provided with a third rotating shaft, the second rotating shaft and the third rotating shaft are arranged along the length direction, and one end of the second rotating shaft is connected to one end of the third rotating shaft, one end of the third rotating shaft is connected to a fourth rotating shaft along the length direction, and the fourth rotating shaft and the first rotating shaft are commonly sleeved with a bevel gear set;

[0029] The driving mechanism is used to drive the second rotating shaft on the torque multiplier to rotate, thereby driving the third rotating shaft to rotate, and then driving the bevel gear set to change direction and rotate, and finally rotating the first rotating shaft, thereby rotating the clamping mechanism.

[0030] The above scheme is adopted to set up the second and third rotating shafts, with the aim of ensuring that the force can be unstable under large torque conditions, effectively reducing the force transmission error caused by poor alignment between shafts or other factors; the fourth rotating shaft is adopted mainly to distinguish it from the third rotating shaft, with the aim of allowing the two rotating shafts to achieve effective collaborative work while maintaining independent functions, which not only ensures the stability and accuracy of the torque sensor, but also improves the transmission efficiency and reliability of the overall system.

[0031] Preferably, the flange mounting portion is fixed on the housing, and a connecting piece is installed below the first rotating shaft. The connecting piece extends in a vertical direction, and its bottom penetrates into the mounting cavity, so that the connecting piece is engaged with the fixing seat.

[0032] Preferably, the bevel gear set comprises two bevel gears, one of which is sleeved on the fourth rotating shaft, and the other is sleeved on the first rotating shaft, and the two bevel gears are meshed with each other.

[0033] Preferably, the driving mechanism includes a motor and a battery, the motor is installed in the housing, and the output end of the motor extends along the length direction and is connected to the second rotating shaft;

[0034] The battery is pluggably installed at one end of the shell, and the output end of the battery is located inside the shell and is electrically connected to the motor.

[0035] The beneficial effects of the present invention are:

[0036] (1) The present invention uses a screw member to jointly drive multiple flange clamping rods to move relative to the vertical center line, so that the distance between the multiple flange clamping rods and the vertical center line changes, that is, the multiple flange clamping rods are tightened or opened by the screw member, so that bolts of different diameters can be clamped, replacing the sleeve method used in the prior art. This solution is suitable for bolts of different diameters and does not require frequent replacement of sleeves, which significantly improves the convenience and efficiency of operation. In addition, it avoids carrying a large number of heavy tools every time working at high altitude, improves work efficiency, and reduces work risks. It is specially designed for large-diameter bolts of transmission towers and has high applicability. It can meet the needs of different bolt models on towers, flanges and various connecting parts.

[0037] (2) The present invention sets two first rotating shafts in the width direction of the torque sensor. The purpose is to be able to install the wrench clamping mechanism at the upper end of the torque sensor in the width direction or at the lower end of the torque sensor in the width direction according to the actual application scenario. The main purpose is that when the motor is working normally, the mechanism is installed at the lower end of the torque sensor and can be used to tighten the bolts. When installed at the upper end of the torque sensor, it can still clamp the bolts to achieve the disassembly function; thereby avoiding the situation where the wrench cannot be rotated due to factors such as a small space, and the bolts cannot be replaced or tightened;

[0038] (3) The present invention adopts battery power supply to drive the motor, and the output end of the motor rotates, thereby driving the rotation of the second rotating shaft on the torque multiplier, thereby driving the rotation of the third rotating shaft and the fourth rotating shaft in turn, thereby driving the rotation of the bevel gear on the fourth rotating shaft, and driving the rotation of the bevel gear on the first rotating shaft, that is, realizing the change from the rotation of the output end of the motor in the longitudinal direction to the rotation of the first rotating shaft in the vertical direction, that is, realizing reversal, thereby driving the rotation of the connecting part, driving the rotation of the screw part, thereby driving the flange clamping rod to tighten or open, and the bolt can be clamped, that is, by starting the motor, mainly the reverse operation of the servo motor, the bottom end of the clamping plate of the wrench clamping mechanism is placed in the groove of the hexagon socket bolt, thereby realizing the disassembly of the hexagon socket bolt.

[0039] (4) The torque wrench mentioned in the present invention can effectively solve the problem of bolt tightening on the existing transmission tower through the wrench clamping mechanism at the front end. The construction environment is harsh, and when people work at height, it is inconvenient to use the tightening wrench due to the flange skirt around the bolt, which poses a high safety hazard to workers after working for a long time. It is convenient for construction workers to operate and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the three-dimensional structure of the wrench clamping mechanism of the present invention;

[0041] Figure 2 This is a schematic diagram of the three-dimensional structure of the wrench clamping mechanism of the present invention after removing the limiting shell assembly;

[0042] Figure 3 Schematic diagram of the three-dimensional structure of the torque wrench of the present invention;

[0043] Figure 4 This is a schematic diagram of the three-dimensional structure of the torque wrench of the present invention after the outer shell is cut open;

[0044] Figure 5 This is a front view of the torque sensor in the torque wrench of the present invention after being connected to the flange clamping rod;

[0045] Figure 6 for Figure 5 Schematic diagram of the structure in the AA direction;

[0046] Figure 7 for Figure 6 Schematic diagram of the structure of part B;

[0047] Figure 8 A side view of the torque sensor in the torque wrench of the present invention after being connected to the flange clamping rod;

[0048] Figure 9 for Figure 8 Schematic diagram of the structure in the CC direction;

[0049] Figure 10 This is a schematic diagram of the three-dimensional structure of the limit housing assembly in the torque wrench of the present invention;

[0050] Figure 11 It is a front view of the limit housing assembly in the torque wrench of the present invention;

[0051] Figure 12 A schematic diagram of the structure among the second rotating shaft, the third rotating shaft and the fourth rotating shaft in the torque wrench of the present invention;

[0052] Figure 13 A schematic diagram of the structure between the screw member, the fixing block and the flange clamping rod in the torque wrench of the present invention;

[0053] Figure 14 It is a schematic diagram of the three-dimensional structure of the screw and the fixing seat in the torque wrench of the present invention.

[0054] Figure: flange fixing portion 1; screw 2; smooth section 201; threaded section 202; flange clamping rod 3; four-bar linkage 31; gear 311; first link 312; second link 313; third link 314; fourth link 315; clamping plate 32; bent clamping portion 321; anti-slip gasket 3211; flange mounting portion 4; mounting chamber 41; limit housing assembly 5; truncated cone limit seat 51; limit housing 52; limit arc block 521 ; through hole 53; connector 54; housing 6; torque sensor 7; torque sensor housing 71; first rotating shaft 72; torque multiplier 8; drive mechanism 9; motor 91; battery 92; second rotating shaft 10; third rotating shaft 11; fourth rotating shaft 12; spring ball 13; spring 14; bevel gear set 15; bevel gear 151; connector 16; spring hole 17; fixing seat 18; spring placement groove 181; fixing block 19; threaded hole 20. DETAILED DESCRIPTION

[0055] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further explained below with reference to specific illustrations.

[0056] Example 1

[0057] like Figure 1-2 As shown, a wrench clamping mechanism includes a flange fixing part 1, a screw member and a clamping assembly. The bolt clamped by the clamping assembly is used as a reference, that is, in the axial direction and the radial direction. A clamping assembly is installed on one end face of the flange fixing part 1. The clamping assembly includes a fixing block 19 and a plurality of flange clamping rods 3. The flange fixing part 1 is sleeved on the outside of the fixing block 19. The plurality of flange clamping rods 3 are arranged along the bottom of the fixing block and are symmetrically distributed along the radial direction of the flange fixing part 1. The flange fixing part 1 is sleeved on the screw member. The bottom of the screw member extends through the flange fixing part 1 and is threadedly engaged with the plurality of flange clamping rods 3. The flange fixing part 1 and the screw member undergo relative movement in the vertical direction, so that the plurality of flange clamping rods 3 are respectively threadedly engaged with the screw member and move closer to or farther away from each other in the vertical direction, thereby clamping or loosening the bolt.

[0058] The fixing block 19 is sleeved on the screw member in the axial direction, and the fixing block 19 and the screw member are locked together by the screw. As the screw member rotates in the flange fixing part 1, the fixing block 19 and the clamping assembly rotate, so that the flange clamping rod 3 can loosen or tighten the bolt after clamping the bolt. Specifically:

[0059] The wrench clamping mechanism further includes a flange mounting portion 4, the interior of which has a mounting chamber 41; the screw member includes a screw 2 and a fixing seat 18, and the screw member 18 is fixed to the fixing seat 18 along the axial direction.

[0060] The screw rod 2 is provided with a smooth section 201 along the axial direction, and the smooth section 201 is fixed to the fixing seat 18 along the axial direction and extends into the installation chamber 41 along the vertical direction; the smooth section 201 corresponds to the fixing block 19 along the axial direction, and the fixing block 19 and the smooth section 201 are locked together by screws. As the smooth section 201 rotates in the flange fixing part 1, the rotation of the fixing block 19 and the clamping assembly is realized, so that the flange clamping rod 3 can loosen or tighten the bolt after clamping the bolt; more specifically, a screw hole is opened on the outside of the flange fixing part 1, and the screw hole extends in the radial direction to the contact between the fixing block 19 and the smooth section 201. In the embodiment of the present invention, a half-threaded hole is formed on the smooth section 201 and the fixing block 19 respectively, and the two half-threaded holes are combined to form a threaded hole 20. When a screw enters from the screw hole on the flange fixing part 1, it enters the threaded hole 20 formed by the two half-threaded holes, and the screw hole and the screw do not contact each other, so as to fix the smooth section 201 and the fixing block 19, but cannot fix the screw member and the flange fixing part 1. Therefore, when the screw member rotates, the fixing block 19 can be rotated, and finally the flange clamping rod 3 is rotated, that is, the fixing block 19 and the clamping assembly are rotated, so that the flange clamping rod 3 can loosen or tighten the bolt after clamping the bolt.

[0061] The screw rod 2 also includes a threaded section 202, which is fixedly connected to the smooth section 201 in the axial direction. Each flange clamping rod 3 includes a four-bar linkage 31 and a clamping plate 32. One of the rods in the four-bar linkage 31 extends in its own direction and has a gear 311 at one end. The gear 311 is engaged with the threaded section 202. The top of another rod in the four-bar linkage 31 is fixed to the bottom surface of the flange fixing portion 1. The third rod of the four-bar linkage 31 is hinged to the clamping plate 32. Specifically, the four-bar linkage 31 includes a first link 312, a second link 313, a third link 314 and a fourth link 315, and the first link 312, the second link 313, the third link 314 and the fourth link 315 are hinged to each other. The first connecting rod 312 is connected in a "mouth" shape, wherein the first connecting rod 312 extends along its own direction and bends to form a bent portion, the end of the bent portion extends into the interior of the flange fixing portion 1 and is fixed to the fixing block 19; the second connecting rod 313 and the third connecting rod 314 are respectively hinged to the first connecting rod 312, and the gear 311 is provided at the end of the second connecting rod 313 along its own extension direction, and the gear 311 is engaged with the threaded segment 202; the fourth connecting rod 315 is respectively hinged to the second connecting rod 313 and the third connecting rod 314, and the hinge of the fourth connecting rod 315 and the third connecting rod 314 is also hinged to the clamping plate 32. More specifically, the fourth connecting rod 315 and the clamping plate 52 are integrally formed, and the connection between the fourth connecting rod 315 and the clamping plate 32 forms a bend;

[0062] The gears 311 on the four flange clamping rods 3 are engaged with the threaded section 202 , and the four gears 311 are sequentially arranged along the radial direction of the screw rod 2 .

[0063] The clamping plate 32 has a bent clamping portion 321 , which is parallel to the vertical surface. A plurality of bent clamping portions 321 correspond to the circumference of the bolt.

[0064] The bent clamping portion 321 is provided with an anti-slip pad 3211 along the vertical direction, and the anti-slip pad 3211 is in contact with the circumference of the bolt.

[0065] A spring 14 is sleeved vertically inside the fixing seat 18, and the spring 14 extends out of the fixing seat 18 in its own direction. Specifically, a spring placement groove 181 is provided on the fixing seat 18, and the spring 14 is placed in the spring placement groove 181 in the vertical direction. The fixing seat 18 extends vertically from the bottom of the flange mounting seat 4 into the mounting chamber 41, so that the top of the spring 14 contacts the inner top side wall of the mounting chamber 41. The flange fixing portion 1 is rotatably sleeved on the bottom of the flange mounting portion 4, and the top of the flange mounting portion 4 is also fixed to the housing 6 by screws.

[0066] A limiting shell component 5 is threadedly sleeved on the outer side wall of the flange fixing portion 1 , and the limiting shell component 5 is located on the outer side of the clamping plate 32 .

[0067] The limiting shell assembly 5 includes a connector 54, a truncated cone limiting seat 51 and a plurality of limiting shells 52. The connector 54 is fixed to the top of the truncated cone limiting seat 51. The upper end of the connector 54 is fixedly sleeved on the outside of the flange fixing portion 1 in the vertical direction. The plurality of limiting shells 52 are arranged along the circumference of the truncated cone limiting seat 51. A through hole 53 is opened on the truncated cone limiting seat 51, and each limiting shell 52 extends in the vertical direction. The limiting shell 52 is located on the outside of the clamping plate 32, and there is a space between each two adjacent limiting shells 52. There are gaps, each gap corresponding to the through hole 53. Specifically, each limiting shell 52 includes a plurality of limiting arc blocks 521, and the plurality of limiting arc blocks 521 are connected end to end in the vertical direction, and the radius of each two adjacent limiting arc blocks 521 decreases in sequence. The purpose is to design limiting arc blocks 521 of different widths and heights according to the structural strength of different parts of the flange clamping rod 3, so that the entire clamping device will not be deformed due to excessive torque during operation.

[0068] The top of the limiting arc block 521 located at the highest point is fixedly connected to the bottom of the truncated cone limiting seat 51 in the vertical direction. More specifically, there are four limiting arc blocks 521, and the shape of the through hole 53 is a "cross" structure. The gap between each two adjacent limiting arc blocks 521 corresponds to the through hole 53 of the "cross" structure, and each flange clamping rod 32 enters the limiting shell 52 through the through hole 53 of the "cross" structure, and corresponds to the side wall of the limiting shell 52 in the vertical direction.

[0069] Example 2

[0070] like Figure 3-14 As shown, a torque wrench for tightening transmission tower bolts includes the above-mentioned wrench clamping mechanism, a housing 6 and a torque sensor 7. The housing 7 has a length direction and a width direction. The width direction of the housing 6 is parallel to the vertical direction. The torque sensors 7 are arranged in sequence along the length direction of the housing 6.

[0071] The torque sensor 7 includes a torque sensor housing 71 and two first rotating shafts 72 . The two first rotating shafts 72 are respectively rotatably sleeved on the torque sensor housing 71 along the width direction. One of the first rotating shafts 72 is connected to the above-mentioned wrench clamping mechanism.

[0072] The torque wrench further includes a torque multiplier 8 (it should be noted that the torque multiplier 8 in the present invention adopts a commercially available torque multiplier, such as model T-MULT120, and its structure and torque rotation principle are not elaborated in detail herein) and a drive mechanism 9. The drive mechanism 9 and the torque multiplier 8 are mounted in the housing 6 along the length direction, and the torque multiplier 8 is mounted in the middle position between the drive mechanism 9 and the torque sensor 7;

[0073] The free end of the torque multiplier 8 is connected to the free end of the torque sensor 7 arranged along its horizontal direction. The free end of the torque sensor 7 and the first rotating shaft 72 are jointly sleeved with a bevel gear set 15.

[0074] The drive mechanism 9 is used to drive the free end of the torque multiplier 8 to rotate, thereby driving the free end of the torque sensor 7 to rotate, and then driving the bevel gear set 15 to change direction and rotate, ultimately rotating the first rotating shaft 72, thereby rotating the clamping mechanism. Specifically, the torque multiplier 8 is provided with a second rotating shaft 10, and the torque sensor 7 is provided with a third rotating shaft 11. The second rotating shaft 10 and the third rotating shaft 11 are arranged along the length direction, and one end of the second rotating shaft 10 is connected to one end of the third rotating shaft 11. One end of the third rotating shaft 11 is connected to the fourth rotating shaft 12 in a nested manner along the length direction. The bevel gear set 15 is sleeved on both the fourth rotating shaft 12 and the first rotating shaft 72.

[0075] The driving mechanism 9 is used to drive the second rotating shaft 10 on the torque multiplier 8 to rotate, thereby driving the third rotating shaft 11 to rotate, and then driving the bevel gear set 15 to change direction and finally rotate the first rotating shaft 72, thereby rotating the clamping mechanism.

[0076] The above scheme is adopted to set up a second rotating shaft 10 and a third rotating shaft 11, the purpose of which is to ensure that the force can be unstable under large torque conditions, effectively reducing the force transmission error caused by poor alignment between shafts or other factors; the fourth rotating shaft 12 is adopted mainly to distinguish it from the third rotating shaft 11, the purpose of which is to allow the two rotating shafts to achieve effective collaborative work while maintaining independent functions, which not only ensures the stability and accuracy of the torque sensor 7, but also improves the transmission efficiency and reliability of the overall system.

[0077] In order to achieve a better torque effect, the diameters of the second rotating shaft 10 , the fourth rotating shaft 12 and the third rotating shaft 11 are set to decrease in sequence.

[0078] The flange mounting portion 4 is fixed to the housing 6. Specifically, the flange mounting portion 4 is fixed to the housing 6 by screws.

[0079] A connecting piece 16 is installed below the first rotating shaft 72. The connecting piece 16 extends in the vertical direction, and its bottom penetrates and extends into the installation chamber 41, so that the connecting piece 16 is clamped with the flange mounting part 4. Specifically, a spring ball 13 is installed on the side wall of the connecting piece 16, and an opening is provided at the top of the flange mounting part 4, which is connected to the installation chamber 41. A spring hole 17 matching the spring ball 13 is provided on the side wall of the spring placement groove 181 in Example 1. The spring ball 13 enters the spring placement groove 181 through the opening and moves, so that the spring ball 13 is in line contact with the inner wall of the spring placement groove 181 and extrusion is generated. When encountering the spring hole 17, the extrusion disappears, and the spring ball 13 extends into the spring hole 17 under the action of its own structure, so that the spring ball 13 is in line contact with the inner wall of the spring hole 17. At this time, the spring ball 13 is restricted in the spring hole 17, and the connecting piece 16 is connected to the fixing seat 18.

[0080] The bevel gear set 15 includes two bevel gears 151 , one of the bevel gears 151 is sleeved on the fourth rotating shaft 12 , and the other bevel gear 151 is sleeved on the first rotating shaft 72 , and the two bevel gears 151 are meshed with each other.

[0081] The driving mechanism 9 includes a motor 91 and a battery 92. The motor 91 is installed in the housing 6, and the output end of the motor 91 extends along the length direction and is connected to the second rotating shaft 10.

[0082] The battery 92 is pluggably installed at one end of the housing 6 . The output end of the battery 92 is located inside the housing 6 and is electrically connected to the motor 91 .

[0083] It should be noted that the torque sensor 7 adopts a torque sensor in the prior art, such as the model: LZN1-D dynamic torque sensor, which detects the torque value by a strain gauge fixed on its transmission shaft. The strain gauge is fixed on the surface of the transmission shaft (not shown in the figure) and is a sensitive element that can detect torque. The torque sensor 7 transmits the signal through a slip ring. The slip ring is a commonly used component in motors or rotating machinery (not shown in the figure) and is used to transmit electrical signals between fixed and rotating parts. The torque sensor 7 transmits the signal to the external data acquisition system through the slip ring. When the motor 911 works and drives the torque sensor 7 to work, the fourth shaft 12 rotates. At this time, the strain gauge can detect the micro-deformation of the fourth shaft 12, thereby converting it into a corresponding torque value and transmitting the data through the wireless transmission module.

[0084] This wrench operates in the following manner:

[0085] The present invention is powered by a battery 92 to drive a motor 91 (the motor 91 is provided with a switch, which can be turned on or off by opening and closing the switch, and for ease of operation, the switch extends out of the housing 6). The output end of the motor 6 rotates, thereby driving the rotation of the second rotating shaft 10 on the torque multiplier 8, thereby driving the rotation of the third rotating shaft 11 and the fourth rotating shaft 12 in turn, thereby driving the rotation of the bevel gear 151 on the fourth rotating shaft 12, and driving the rotation of the bevel gear 151 on the first rotating shaft 72, that is, realizing the change from the rotation of the output end of the motor 91 in the longitudinal direction to the rotation of the first rotating shaft 72 in the vertical direction, that is, realizing reversal, converting the horizontal axial force into a longitudinal axial force, thereby driving the rotation of the connecting member 16, driving the rotation of the fixing seat 18, driving the screw 2 to rotate, thereby driving the flange clamping rod 3 to tighten. The second link 313 is connected to the first link 312, and the second link 313 is connected to the first link 312, so that the fourth link 313 moves in the opposite direction relative to the movement of the gear on the screw. The third link 314 connects the first link 312 and the fourth link 315, so that the fourth link 315 is deflected relative to the vertical plane. The plurality of fourth links 315 are deflected at the same time, and then the plurality of clamping plates 32 are deflected at the same time, so that the plurality of bent clamping portions 321 are deflected at the same time, that is, the opening or tightening state is achieved), so that the bolt can be clamped, that is, the torque multiplier 8 amplifies the torque of the motor 4, and transmits the torque to the screw 2 through the transmission of the bevel gear set 15 of the torque sensor 7. The screw 2 then transmits the torsional force to the gear 311 that is meshed with the meshing screw 2.

[0086] The spring 14 located inside the fixing seat 18 is mainly responsible for resetting the flange clamping rod 3 on the auxiliary screw 2 when the bolt reaches the tightened state. By starting the motor 91, mainly the reverse operation of the servo motor, the bottom end of the clamping plate 32 of the wrench clamping mechanism is placed in the groove of the hexagon socket bolt, thereby realizing the removal of the hexagon socket bolt;

[0087] In addition, after the flange clamping rod clamps the bolt, it is then tightened in the threaded hole to fix the screw and the fixed block, so that it rotates at the output end of the starting motor 6, thereby driving the rotation of the second rotating shaft 10 on the torque multiplier 8, thereby driving the rotation of the third rotating shaft 11 and the fourth rotating shaft 12 in turn, thereby driving the rotation of the bevel gear 151 on the fourth rotating shaft 12, and driving the rotation of the bevel gear 151 on the first rotating shaft 72, that is, realizing the change from the rotation of the output end of the motor 91 in the longitudinal direction to the rotation of the first rotating shaft 72 in the vertical direction, that is, realizing reversal, converting the horizontal axial force into a longitudinal axial force, thereby driving the rotation of the connecting piece 16, driving the fixing seat 18, the screw 2 and the fixing block 19 to rotate together, thereby driving the flange clamping rod 3 to rotate, that is, realizing loosening or tightening the bolt.

[0088] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. Various changes and improvements can be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A wrench clamping mechanism, characterized in that: It comprises a flange fixing part, a screw rod and a clamping assembly. The bolt clamped by the clamping assembly is used as a reference, that is, in the axial direction and the radial direction. The clamping assembly is installed on one end face of the flange fixing part. The clamping assembly comprises a fixing block and a plurality of flange clamping rods. The flange fixing part is sleeved on the outside of the fixing block. The plurality of flange clamping rods are arranged along the bottom of the fixing block and are symmetrically distributed along the radial direction of the flange fixing part. The flange fixing part is sleeved on the screw rod. The bottom of the screw rod extends through the flange fixing part and is threadedly engaged with the plurality of flange clamping rods. The flange fixing part and the screw rod move relative to each other in the vertical direction, so that the plurality of flange clamping rods respectively cooperate with the screw rod threads and approach or move away from each other in the vertical direction, so that the flange clamping rods clamp or loosen the bolts. The fixing block is sleeved on the screw member in the axial direction, and the fixing block and the screw member are locked together by a screw. As the screw member rotates in the flange fixing part, the fixing block and the clamping assembly rotate, so that the flange clamping rod can loosen or tighten the bolt after clamping the bolt.

2. A wrench clamping mechanism according to claim 1, characterized in that: The screw member comprises a screw and a fixing seat, and the screw member is fixed to the fixing seat along the axial direction; The screw rod is provided with a smooth section along the axial direction, the smooth section is fixed to the fixing seat along the axial direction and extends into the installation chamber along the vertical direction; the smooth section corresponds to the fixing block along the axial direction, and the fixing block and the smooth section are locked together by a screw, and as the smooth section rotates in the flange fixing part, the fixing block and the clamping assembly are rotated, so that the flange clamping rod can loosen or tighten the bolt after clamping the bolt.

3. A wrench clamping mechanism according to claim 2, characterized in that: The screw rod also includes a threaded section, which is fixedly connected to the smooth section along the axial direction. Each of the flange clamping rods includes a four-bar linkage and a clamping plate. One of the rods in the four-bar linkage extends along its own direction and has a gear at one end, the gear is meshed with the threaded section, the top of another rod in the four-bar linkage is fixed to the bottom surface of the flange fixing portion, and the third rod of the four-bar linkage is hinged to the clamping plate. The gears on the four flange clamping rods are meshed with the threaded section together, and the four gears are arranged in sequence along the radial direction of the screw member.

4. A wrench clamping mechanism according to claim 3, characterized in that: The clamping plate has a bent clamping portion, which is parallel to the vertical surface, and a plurality of the bent clamping portions correspond to the circumferential surface of the bolt.

5. A wrench clamping mechanism according to claim 1, characterized in that: A limiting shell component is threadedly sleeved on the outer side wall of the flange fixing portion, and the limiting shell component is located on the outer side of the clamping plate.

6. A wrench clamping mechanism according to claim 5, characterized in that: The limiting shell assembly includes a connecting head, a truncated cone limiting seat and a plurality of limiting shells, wherein the connecting head is fixed on the top of the truncated cone limiting seat, and the upper end of the connecting head is fixedly sleeved on the outside of the flange fixing part in the vertical direction, and the plurality of limiting shells are arranged along the circumference of the truncated cone limiting seat, a through hole is opened on the truncated cone limiting seat, and each of the limiting shells extends in the vertical direction, and the limiting shells are located on the outside of the clamping plate, and there is a gap between each two adjacent limiting shells, and each of the gaps corresponds to a through hole.

7. A torque wrench for tightening bolts of a transmission tower, characterized in that: The invention comprises the wrench clamping mechanism as described in any one of claims 1 to 6.

8. The torque wrench according to claim 7, characterized in that: It also includes a housing and a torque sensor, wherein the housing has a length direction and a width direction, the width direction of the housing is parallel to the vertical direction, and the torque sensors are arranged in sequence along the length direction of the housing; The torque sensor comprises a torque sensor housing and two first rotating shafts. The two first rotating shafts are respectively rotatably sleeved on the torque sensor housing along the width direction, and one of the first rotating shafts is connected to the above-mentioned wrench clamping mechanism.

9. The torque wrench according to claim 7, characterized in that: The flange mounting portion is fixed on the housing, a connecting piece is installed below the first rotating shaft, the connecting piece extends in a vertical direction, and a bottom thereof penetrates and extends into the mounting chamber, so that the connecting piece is clamped with the fixing seat.

10. The torque wrench according to claim 7, characterized in that: The torque wrench further comprises a torque multiplier and a driving mechanism, wherein the driving mechanism and the torque multiplier are mounted in the housing along the length direction, and the torque multiplier is mounted at a middle position between the driving mechanism and the torque sensor; The free end of the torque multiplier is connected to the free end of the torque sensor arranged along its horizontal direction, and the free end of the torque sensor and the first rotating shaft are jointly sleeved with a bevel gear set. The driving mechanism is used to drive the free end of the torque multiplier to rotate, thereby driving the free end of the torque sensor to rotate, and then driving the bevel gear set to change direction and rotate, and finally rotate the first rotating shaft, thereby rotating the clamping mechanism.

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