High-adaptability electric torque wrench

Abstract

The utility model provides a high suitability electric torque wrench which comprises a torque wrench body and a sleeve mechanism arranged on the torque wrench body, the sleeve mechanism comprises an outer sleeve and an inner sleeve, the outer sleeve is installed on the torque wrench body, the inner sleeve is fixedly installed in the outer sleeve through a connecting support, and the connecting support is connected with the inner sleeve. Six clamping pieces used for forming an inner hexagonal hole are evenly distributed in the inner sleeve, the six clamping pieces are installed on the inner sleeve in a sliding mode in the radial direction, and an adjusting assembly used for driving the six clamping pieces to slide in the radial direction is arranged on the outer sleeve so as to adapt to bolts and nuts with different diameters by adjusting the distance between the clamping pieces. The sleeve can be suitable for nuts of different sizes, when the sleeve is used, the nut is sleeved with the inner sleeve, the rotating motion of the adjusting gear can be converted into the horizontal movement of the screw rod, then the six clamping pieces are driven to be fixed to the nut, the displacement distances of the nuts of different diameters and the clamping pieces are different, and therefore locking operation of the nuts of different sizes is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to a high-adaptability electric torque wrench. Background Art

[0002] Torque wrenches are widely used in various industries and fields, especially in the fields of automobile manufacturing, machinery manufacturing, aerospace, etc. Compared with traditional manual wrenches, electric wrenches have higher working efficiency. They can quickly rotate and lock bolts or nuts, greatly shortening the working time and improving production efficiency. However, when using existing torque wrenches, different-sized sockets need to be replaced according to the size of the nut, which is very troublesome to use.

[0003] In view of this, the inventor of this case conducted in-depth research on the above problems, and thus this case was born. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-adaptability electric torque wrench with a simple structure, convenient use, which can be simultaneously applicable to the locking and disassembly of nuts and bolts of different sizes, and has a wide application range.

[0005] The solution adopted by the utility model to solve the technical problem is: a high-adaptability electric torque wrench, including a torque wrench body and a socket mechanism arranged on the torque wrench body. The socket mechanism includes an outer socket and an inner socket. The outer socket is installed on the torque wrench body. The inner socket is fixedly installed in the outer socket through a connecting bracket. Six clamping pieces for forming an inner hexagonal hole are evenly distributed in the inner socket. The six clamping pieces are radially slidably installed on the inner socket. An adjusting assembly for driving the six clamping pieces to radially slide is arranged on the outer socket so as to adapt to bolts and nuts of different diameters by adjusting the distance between the clamping pieces.

[0006] Furthermore, in order to radially movably install the clamping pieces in the inner socket so as to adapt to bolts and nuts of different diameters by adjusting the distance between the clamping pieces; the adjusting assembly includes six screw rods evenly distributed in the inner socket and adjusting gears threadedly installed on the outer sides of the screw rods. The six screw rods are radially slidably installed on the inner socket. A sliding groove is radially and inwardly recessed on the screw rod. A limiting rib for embedding in the sliding groove to lock the rotation of the screw rod is arranged on the inner socket. The clamping piece is installed on the inner side of the screw rod. The adjusting gear is rotatably installed on the inner socket through a bearing so as to drive the screw rod to radially slide in the inner socket by rotating the adjusting gear.

[0007] Furthermore, in order to drive the six adjusting gears to rotate synchronously, thereby driving the six screws to move synchronously to change the spacing between the clips; the sleeve mechanism also includes a synchronization assembly for synchronously driving the six screws to slide, the synchronization assembly including a synchronization gear, a driven gear and a driving gear, a gear shaft is rotatably mounted between the inner sleeve and the outer sleeve, the synchronization gear is coaxially fixedly mounted on the lower side of the gear shaft, and the synchronization gear is simultaneously engaged with the six adjusting gears so that the rotation of the synchronization gear drives the six adjusting gears to rotate synchronously;

[0008] The driven gear is coaxially fixedly mounted on the upper side of the gear shaft, the driving gear is rotatably mounted on the outer sleeve and the driving gear is engaged with the driven gear to drive the gear shaft to rotate and thereby drive the synchronous gear to rotate. A square shaft is provided on the torque wrench body, and a joint protruding axially upward is provided on the upper side of the outer sleeve. A square hole is provided on the joint for embedding the square shaft, and a notch is provided on the joint for engaging the driving gear with the driven gear.

[0009] Furthermore, in order to output torque slowly and stably to achieve the purpose of precise torque control; a ratchet mechanism is further provided between the torque wrench body and the sleeve mechanism, the ratchet mechanism comprising a ratchet box, a swinging assembly and a ratchet assembly, the ratchet box being provided with a handle for holding, the swinging assembly and the ratchet assembly being arranged in the ratchet box, the swinging assembly being transmission-connected to the torque wrench body, the ratchet assembly being transmission-connected to the swinging assembly so that the swinging assembly drives the ratchet assembly to rotate forward and reverse, and the sleeve mechanism being mounted on the ratchet assembly so that the ratchet assembly drives the ratchet assembly to tighten the bolts and nuts;

[0010] The swing assembly includes a drive shaft, a rotating rod, a swing rod, a swing shaft, a fan gear and a swing gear, the drive shaft is rotatably mounted in the ratchet box, one end of the drive shaft is transmission-connected to the torque wrench body, the other end of the drive shaft is fixedly connected to one end of the rotating rod, the other end of the rotating rod is provided with a slider, the swing shaft is rotatably mounted in the ratchet box, one end of the swing rod is fixedly mounted on the swing shaft, the swing rod is provided with a slide groove, the slider is slidably mounted on the slide groove so that the swing rod is driven to swing by the rotation of the rotating rod, the fan gear is coaxially fixedly mounted on the swing shaft so as to swing with the swing rod, the swing gear is rotatably mounted in the ratchet box, and the swing gear is meshed with the fan gear so as to drive the swing gear forward and reverse by the back and forth swing of the fan gear, and the swing gear is coaxially fixedly connected to the ratchet assembly to drive the ratchet assembly forward and reverse.

[0011] Further, in order to achieve that the swinging assembly swings back and forth once and the ratchet mechanism rotates by a unit amount to slowly output torque; the ratchet assembly includes a ratchet shaft, a ratchet, a pawl, a spring, and a connecting shaft for installing the sleeve mechanism. The ratchet shaft is rotatably installed in the ratchet box. The ratchet and the swinging gear are coaxially and fixedly installed on the ratchet shaft. A turntable is also rotatably installed on the ratchet shaft through a bearing. One end of the pawl is rotatably installed on the turntable, and the other end of the pawl is located beside the ratchet. One end of the spring is installed on one side of the pawl, and the other end of the spring is installed on the turntable and located on the other side of the pawl. The connecting shaft is rotatably installed on the ratchet box. One end of the connecting shaft is coaxially and fixedly connected to the turntable, and the other end of the connecting shaft is connected to the sleeve mechanism through a dynamic torque sensor.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] (1) The sleeve mechanism of the present utility model is applicable to nuts of different sizes. When in use, the inner sleeve is sleeved on the nut, and the driving gear is rotated. The rotation of the driving gear drives the driven gear to rotate. The synchronous gear coaxially and fixedly connected to the driven gear rotates synchronously, and then drives the six adjusting gears meshing with the synchronous gear to rotate. Since the adjusting gears are rotatably installed on the inner sleeve, the rotational movement of the adjusting gears will be converted into the horizontal movement of the screw rod, thereby driving the six clamping pieces to be fixed on the nut. For nuts of different diameters, the displacement distances of the clamping pieces are different, so as to complete the locking operation of nuts of various sizes.

[0014] (2) In order to achieve the precise output of torque, the present utility model also provides a ratchet mechanism. When installing a nut with high torque requirements, the ratchet mechanism is installed on the square shaft. The power output by the square shaft will drive the rotating rod to rotate 360 degrees. Since the slider is always in the chute, the 360-degree rotation of the slider will drive the swinging rod to swing left and right within a certain angle, and the sector gear will swing accordingly, and then drive the swinging gear to rotate forward and backward alternately. When the swinging gear rotates forward, it drives the ratchet to rotate forward. The pawl will not catch the ratchet, the pawl does not rotate, and the turntable also remains stationary. At this time, the nut does not rotate. When the swinging gear rotates to the end and starts to reverse, at this time, the pawl catches on the ratchet, and the ratchet continues to rotate, which will push the pawl and the turntable fixedly connected to the pawl to rotate, thereby driving the sleeve to rotate and tightening the nut, slowly outputting torque, so as to achieve the precise control of torque. Description of the Drawings

[0015] The following further describes the present utility model with reference to the drawings in conjunction with embodiments:

[0016] Figure 1 is the structural schematic diagram of the present utility model Figure 1 ;

[0017] Figure 2 is the structural schematic diagram of the present utility modelFigure 2 ;

[0018] Figure 3 is a schematic structure of the sleeve mechanism Figure 1 ;

[0019] Figure 4 is a schematic structure of the sleeve mechanism Figure 2 ;

[0020] Figure 5 is a schematic structure diagram of the sleeve mechanism with the top of the outer sleeve removed;

[0021] Figure 6 is a schematic structure diagram of the sleeve mechanism with the top of the outer sleeve and the synchronous gear removed;

[0022] Figure 7 is a schematic structure of the swing assembly Figure 1 ;

[0023] Figure 8 is a schematic structure of the swing assembly Figure 2 ;

[0024] Figure 9 is a schematic structure of the ratchet assembly Figure 1 ;

[0025] Figure 10 is a schematic structure of the ratchet assembly Figure 2 .

[0026] In the figure: torque wrench body 1; sleeve mechanism 2; outer sleeve 21; joint 211; notch 212; inner sleeve 22; connecting bracket 23; clip 24; screw 25; adjusting gear 26; synchronous gear 27; driven gear 28; driving gear 29; ratchet mechanism 3; ratchet box 31; handle 311; swing assembly 32; drive shaft 321; rotating rod 322; slider 3221; swing rod 323; chute 3231; swing shaft 324; sector gear 325; swing gear  326; ratchet assembly 33; ratchet shaft 331; ratchet 332; pawl 333; spring 334; connecting shaft 335; turntable 336. Detailed implementation manners

[0027] The following describes the content of the present utility model in detail with reference to the accompanying drawings of the specification and specific embodiments:

[0028] Embodiment: As Figures 1-10As shown in the figure, this embodiment provides a high - adaptability electric torque wrench, which includes a torque wrench body 1 and a socket mechanism 2 arranged on the torque wrench body 1. The socket mechanism 2 includes an outer socket 21 and an inner socket 22. The outer socket 21 is installed on the torque wrench body 1. The inner socket 22 is fixedly installed in the outer socket 21 through a connecting bracket 23. Six clamping pieces 24 for forming an internal hexagon hole are evenly distributed in the inner socket 22. The six clamping pieces 24 are radially slidably installed on the inner socket 22. An adjusting component is arranged on the outer socket 21 to drive the six clamping pieces 24 to radially slide, so as to adapt to bolts and nuts of different diameters by adjusting the distance between the clamping pieces 24.

[0029] In this embodiment, in order to install the clamping pieces 24 to be radially movable in the inner socket 22, so as to adapt to bolts and nuts of different diameters by adjusting the distance between the clamping pieces 24; the adjusting component includes six screw rods 25 evenly distributed in the inner socket 22 and adjusting gears 26 threadedly installed on the outer sides of the screw rods 25. The six screw rods 25 are radially slidably installed on the inner socket 22. A sliding groove is radially and inwardly recessed on the screw rod 25. A limiting rib is arranged on the inner socket 22 for embedding into the sliding groove to lock the rotation of the screw rod 25. The clamping pieces 24 are installed on the inner sides of the screw rods 25. The adjusting gears 26 are rotatably installed on the inner socket 22 through bearings, so as to drive the screw rods 25 to radially slide in the inner socket 22 by rotating the adjusting gears 26.

[0030] In this embodiment, in order to drive the six adjusting gears 26 to rotate synchronously, and then drive the six screw rods 25 to move synchronously to change the distance between the clamping pieces 24; the socket mechanism 2 further includes a synchronization component for synchronously driving the six screw rods 25 to slide. The synchronization component includes a synchronization gear 27, a driven gear 28 and a driving gear 29. A gear shaft is rotatably installed between the inner socket 22 and the outer socket 21. The synchronization gear 27 is coaxially and fixedly installed on the lower side of the gear shaft. The synchronization gear 27 is simultaneously meshed with the six adjusting gears 26 so as to drive the six adjusting gears 26 to rotate synchronously by the rotation of the synchronization gear 27;

[0031] The driven gear 28 is coaxially and fixedly installed on the upper side of the gear shaft. The driving gear 29 is rotatably installed on the outer socket 21 and the driving gear 29 is meshed with the driven gear 28 to drive the gear shaft to rotate and then drive the synchronization gear 27 to rotate. A square shaft is arranged on the torque wrench body 1. An axially upward - protruding joint 211 is arranged on the upper side of the outer socket 21. A square hole for embedding the square shaft is arranged on the joint 211. A notch 212 for allowing the driving gear 29 to be meshed with the driven gear 28 is arranged on the joint 211.

[0032] In this embodiment, in order to slowly and stably output torque to achieve the purpose of accurately controlling torque; a ratchet mechanism 3 is further provided between the torque wrench body 1 and the sleeve mechanism 2, and the ratchet mechanism 3 includes a ratchet box 31, a swinging assembly 32 and a ratchet assembly 33. The ratchet box 31 is provided with a handle 311 for holding, and the swinging assembly 32 and the ratchet assembly 33 are arranged in the ratchet box 31. The swinging assembly 32 is transmission-connected to the torque wrench body 1, and the ratchet assembly 33 is transmission-connected to the swinging assembly 32 so that the ratchet assembly 33 is driven by the swinging assembly 32 to rotate forward and reversely. The sleeve mechanism 2 is mounted on the ratchet assembly 33 so that the ratchet assembly 33 is driven to tighten the bolts and nuts;

[0033] The swing assembly 32 includes a drive shaft 321, a rotating rod 322, a swing rod 323, a swing shaft 324, a sector gear 325 and a swing gear 326. The drive shaft 321 is rotatably mounted in the ratchet box 31. One end of the drive shaft 321 is transmission-connected to the torque wrench body 1. The other end of the drive shaft 321 is fixedly connected to one end of the rotating rod 322. The other end of the rotating rod 322 is provided with a slider 3221. The swing shaft 324 is rotatably mounted in the ratchet box 31. One end of the swing rod 323 is fixedly mounted on the swing shaft 324. 3 is provided with a slide groove 3231, and the slider 3221 is slidably installed on the slide groove 3231 so that the swing rod 323 can be driven to swing by the rotation of the rotating rod 322. The sector gear 325 is coaxially fixedly installed on the swing shaft 324 so as to swing with the swing rod 323. The swing gear 326 is rotatably installed in the ratchet box 31, and the swing gear 326 is engaged with the sector gear 325 so that the back and forth swing of the sector gear 325 drives the swing gear 326 to rotate forward and reverse. The swing gear 326 is coaxially fixedly connected to the ratchet assembly 33 to drive the ratchet assembly 33 to rotate forward and reverse.

[0034] In this embodiment, in order to realize the swing assembly 32 to swing back and forth once, the ratchet mechanism 3 rotates a unit amount and slowly outputs torque; the ratchet assembly 33 includes a ratchet shaft 331, a ratchet 332, a pawl 333, a spring 334 and a connecting shaft 335 for installing the sleeve mechanism 2, the ratchet shaft 331 is rotatably installed in the ratchet box 31, the ratchet 332 and the swing gear 326 are coaxially fixedly installed on the ratchet shaft 331, and a rotating shaft 335 is rotatably installed on the ratchet shaft 331 through a bearing. Disk 336, one end of the pawl 333 is rotatably mounted on the turntable 336, the other end of the pawl 333 is arranged beside the ratchet 332, one end of the spring 334 is mounted on one side of the pawl 333, the other end of the spring 334 is mounted on the turntable 336 and is located on the other side of the pawl 333, the connecting shaft 335 is rotatably mounted on the ratchet box 31, one end of the connecting shaft 335 is coaxially fixedly connected to the turntable 336, and the other end of the connecting shaft 335 is connected to the sleeve mechanism 2 via a dynamic torque sensor.

[0035] The sleeve mechanism 2 of the present utility model can be applicable to nuts of different sizes. When in use, the inner sleeve 22 is sleeved on the nut, and the driving gear 29 is rotated. The rotation of the driving gear 29 drives the rotation of the driven gear 28. The synchronous gear 27 fixedly connected coaxially with the driven gear 28 rotates synchronously, and then drives the rotation of six adjusting gears 26 meshing with the synchronous gear 27. Since the adjusting gears 26 are rotatably installed on the inner sleeve 22, the rotational movement of the adjusting gears 26 will be converted into the horizontal movement of the screw rods 25, thereby driving the six clamping pieces 24 to be fixed on the nut. For nuts of different diameters, the displacement distances of the clamping pieces 24 are different, so as to complete the locking operation of nuts of various sizes. In addition, in order to achieve accurate torque output, the present utility model further provides a ratchet mechanism 3. When installing a nut with high torque requirement, the ratchet mechanism 3 is installed on the square shaft. The power output by the square shaft drives the rotating rod 322 to rotate 360 degrees. Since the slider 3221 is always within the sliding groove 3231, the 360-degree rotation of the slider 3221 will drive the swing rod 323 to swing left and right within a certain angle. The sector gear 325 swings accordingly, and then drives the swing gear 326 to rotate forward and reverse alternately. When the swing gear 326 rotates forward, it drives the ratchet 332 to rotate forward, and the pawl 333 will not catch the ratchet 332, and the pawl 333 does not rotate, and the turntable 336 also remains stationary. At this time, the nut does not rotate. When the swing gear 326 rotates forward to the end and starts to reverse, at this time, the pawl 333 catches on the ratchet 332, and the ratchet 332 continues to rotate, and then pushes the pawl 333 and the turntable 336 fixedly connected with the pawl 333 to rotate, thereby driving the sleeve to rotate and tightening the nut, and slowly outputting torque, so as to achieve accurate control of torque.

[0036] The above are only the embodiments of the present utility model, and do not limit the patent protection scope of the utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A high - adaptability electric torque wrench, characterized in that: It includes a torque wrench body and a sleeve mechanism arranged on the torque wrench body, the sleeve mechanism includes an outer sleeve and an inner sleeve, the outer sleeve is installed on the torque wrench body, the inner sleeve is fixedly installed in the outer sleeve through a connecting bracket, six clips for forming hexagonal holes are evenly distributed in the inner sleeve, the six clips are radially slidably installed on the inner sleeve, and the outer sleeve is provided with an adjustment component for driving the six clips to slide radially so as to adapt to bolts and nuts of different diameters by adjusting the spacing between the clips.

2. The highly adaptable electric torque wrench according to claim 1, wherein: The adjusting assembly includes six screws evenly distributed in the inner sleeve and an adjusting gear threadedly mounted on the outside of the screws. The six screws are radially slidably mounted on the inner sleeve. A sliding groove is formed on the screws which is radially recessed inward. The inner sleeve is provided with a limiting rib for embedding in the sliding groove to lock the rotation of the screw. The clip is mounted on the inner side of the screw. The adjusting gear is rotatably mounted on the inner sleeve through a bearing so that the screw can be driven to slide radially in the inner sleeve by rotating the adjusting gear.

3. The highly adaptable electric torque wrench according to claim 2, characterized in that: The sleeve mechanism also includes a synchronization assembly for synchronously driving the six screws to slide, the synchronization assembly including a synchronization gear, a driven gear and a driving gear, a gear shaft is rotatably mounted between the inner sleeve and the outer sleeve, the synchronization gear is coaxially fixedly mounted on the lower side of the gear shaft, and the synchronization gear is simultaneously engaged with the six adjustment gears so that the rotation of the synchronization gear drives the six adjustment gears to rotate synchronously; The driven gear is coaxially fixedly mounted on the upper side of the gear shaft, the driving gear is rotatably mounted on the outer sleeve and the driving gear is engaged with the driven gear to drive the gear shaft to rotate and thereby drive the synchronous gear to rotate. A square shaft is provided on the torque wrench body, and a joint protruding axially upward is provided on the upper side of the outer sleeve. A square hole is provided on the joint for embedding the square shaft, and a notch is provided on the joint for engaging the driving gear with the driven gear.

4. The highly adaptable electric torque wrench according to claim 1, characterized in that: A ratchet mechanism is further provided between the torque wrench body and the sleeve mechanism, the ratchet mechanism comprising a ratchet box, a swinging assembly and a ratchet assembly, the ratchet box being provided with a handle for holding, the swinging assembly and the ratchet assembly being arranged in the ratchet box, the swinging assembly being transmission-connected to the torque wrench body, the ratchet assembly being transmission-connected to the swinging assembly so that the swinging assembly drives the ratchet assembly to rotate forward and reverse, and the sleeve mechanism being mounted on the ratchet assembly so that the ratchet assembly drives the ratchet assembly to tighten the bolts and nuts; The swing assembly includes a drive shaft, a rotating rod, a swing rod, a swing shaft, a sector gear, and a swing gear. The drive shaft is rotatably installed in the ratchet box. One end of the drive shaft is in transmission connection with the torque wrench body, and the other end of the drive shaft is fixedly connected to one end of the rotating rod. A slider is provided at the other end of the rotating rod. The swing shaft is rotatably installed in the ratchet box. One end of the swing rod is fixedly installed on the swing shaft. A chute is provided on the swing rod, and the slider is slidably installed on the chute so that the swing rod is driven to swing by the rotation of the rotating rod. The sector gear is coaxially and fixedly installed on the swing shaft so as to swing with the swing rod. The swing gear is rotatably installed in the ratchet box, and the swing gear meshes with the sector gear so that the swing gear is driven to rotate forward and backward by the reciprocating swing of the sector gear. The swing gear is coaxially and fixedly connected to the ratchet assembly to drive the ratchet assembly to rotate forward and backward.

5. The highly adaptable electric torque wrench according to claim 4, wherein: The ratchet assembly includes a ratchet shaft, a ratchet, a pawl, a spring, and a connecting shaft for installing the sleeve mechanism. The ratchet shaft is rotatably installed in the ratchet box. The ratchet and the swing gear are coaxially and fixedly installed on the ratchet shaft. A turntable is also rotatably installed on the ratchet shaft through a bearing. One end of the pawl is rotatably installed on the turntable, and the other end of the pawl is arranged beside the ratchet. One end of the spring is installed on one side of the pawl, and the other end of the spring is installed on the turntable and located on the other side of the pawl. The connecting shaft is rotatably installed on the ratchet box. One end of the connecting shaft is coaxially and fixedly connected to the turntable, and the other end of the connecting shaft is connected to the sleeve mechanism through a dynamic torque sensor.

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