CN210499163U - Torque tool - Google Patents

Abstract

The utility model provides a torque tool, includes handle of a knife, drive mechanism and output mechanism, drive mechanism install in the handle of a knife can by the handle of a knife drives rotatoryly, drive mechanism includes transmission shaft, moment of torsion sensing module and wireless signal transmitter, the transmission shaft fixedly connect in output mechanism just is formed with the shaft hole, moment of torsion sensing module set up in the shaft hole, be used for the sensing the transmission shaft is in produced moment of torsion changes and produces corresponding sensing signal when output mechanism receives the resistance, the wireless signal transmitter electricity connect in moment of torsion sensing module is used for receiving sensing signal and output corresponding wireless signal. The tool holder can be quickly and conveniently installed on a tool magazine and a main shaft of the machine tool, the machining operation of screw locking through the CNC machine tool can be realized, and the application range of the CNC machine tool can be expanded. Therefore, the production efficiency can be improved, and the use requirements flexibly applicable to different types of products can be met.

Description

Torque tool

Technical Field

The present invention relates to a locking tool, and more particularly to a torque tool adapted to be assembled to a machine tool and driven to rotate by the machine tool.

Background

In the field of machining, torque wrenches are commonly used to apply appropriate torque to fasteners such as screws or nuts to perform the tightening operation. Because the existing torque wrench is only suitable for manual operation, the labor cost is high and the efficiency is low.

The other way is to lock the screw by an automatic screw machine, however, the automatic screw machine is usually only suitable for locking a specific type of product, and thus the use requirement of flexibly adapting to different types of products cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a torque tool that can overcome at least one shortcoming of background art.

The utility model discloses a purpose and solve background technical problem adopt following technical scheme to realize, the foundation the utility model provides a torque tool, including handle of a knife, drive mechanism and output mechanism, drive mechanism install in the handle of a knife can by the handle of a knife drives rotatoryly, drive mechanism includes transmission shaft, moment of torsion sensing module and wireless signal transmitter, the transmission shaft fixedly connect in output mechanism just is formed with the shaft hole, moment of torsion sensing module set up in the shaft hole, for the sensing the transmission shaft is in produced moment of torsion when output mechanism receives the resistance changes and produces the sensing signal that corresponds, the wireless signal transmitter electricity connect in moment of torsion sensing module, wireless signal transmitter is used for receiving sensing signal and output corresponding wireless signal.

The utility model discloses a torque tool, the transmission shaft has the restriction the inner peripheral surface in shaft hole, torque sensing module include two set up in the inner peripheral surface is followed the axial looks interval arrangement's of transmission shaft foil gage unit.

The utility model discloses a torque tool, wireless signal transmitter wear to establish and seal in the one end in shaft hole to have protruding stretching the antenna of the one end in shaft hole, output mechanism centers on the antenna sets up and is formed with the confession the space that wireless signal jetted out.

The utility model discloses a torque tool, the transmission shaft has the axostylus axostyle of injecing the shaft hole and forms in the flange of the outer peripheral face of axostylus axostyle, the flange is formed with a plurality of through-holes that arrange into annular each other at an interval, drive mechanism still includes drive module, clamp plate, a plurality of steel balls and first spring, drive module fixedly connect in the handle of a knife and be located flange one side and be formed with a plurality of draw-in grooves that arrange into annular each other at an interval, the clamp plate cover is located the axostylus axostyle and be located the flange opposite to the opposite side of drive module, a plurality of steel balls wear to locate a plurality of through-holes and stretch out the opposite both sides of flange along the axial of axostylus axostyle with sliding respectively, every steel ball can break off the card in corresponding draw-in groove and butt in clamp plate one side, first spring cover is located the axostyl, the elastic force is applied to the pressing plate towards the steel balls and the transmission module.

The utility model discloses a torque tool, drive mechanism still includes drive module, a plurality of steel ball and elasticity bias voltage module, drive module fixedly connect in the handle of a knife and have terminal surface and a plurality of connect aslope in the inclined plane of terminal surface, per two are adjacent the inclined plane is in opposite directions, every steel ball slidable ground is worn to locate transmission shaft and opposite side respectively butt in two adjacent that correspond the inclined plane with elasticity bias voltage module, every the steel ball can be by two adjacent that correspond the inclined plane drives and rotates and can break away from the inclined plane, elasticity bias voltage module is used for the court the drive module direction is right the steel ball is applyed elasticity.

The utility model discloses a torque tool, it is a plurality of the inclined plane is arranged into cyclic annularly and with the terminal surface constitutes ring shape orbit jointly, drive module can pass through ring shape orbit for the steel ball rotates, just drive module for the transmission shaft idle running, every the inclined plane is the rectangle and one of them minor face connect in the terminal surface.

The utility model discloses a torque tool, drive mechanism still includes drive module, a plurality of steel ball, elasticity bias voltage module and adjusting sleeve, drive module fixedly connect in the handle of a knife, every steel ball slidable wear to locate transmission shaft and opposite side respectively can liftoff block in drive module and butt in one side of elasticity bias voltage module, adjusting sleeve spiro union in the handle of a knife and the butt in elasticity bias voltage module opposite in the opposite side of steel ball, adjusting sleeve can pass through the screw in length in the handle of a knife is adjusted the elastic force of elasticity bias voltage module, adjusting sleeve have the surface and form in the preset moment of torsion scale of surface.

The utility model discloses a torque tool, the handle of a knife is formed with two recesses, drive module includes two elastic blocks, two connecting pin and driving disc, two the elastic block is blocked in two respectively in the recess, two the connecting pin is connected respectively in two the elastic block with between the driving disc, the driving disc can liftoff block the steel ball.

The utility model discloses a torque tool, wireless signal transmitter wears to locate the shaft hole has protruding stretch out the antenna of shaft hole one end, output mechanism includes safety coupling, safety coupling fixedly connect in the transmission shaft just centers on the antenna sets up and is formed with the confession the space that wireless signal jetted out.

The utility model discloses a torque tool, output mechanism still includes connecting rod, slide bar, second spring and screwdriver, the connecting rod fixedly connect in safety coupling and be formed with the spout and with the guide slot of spout intercommunication, the spout with the guide slot is all followed the axial extension of transmission shaft, the slide bar has slidable ground and wears to locate spout and part protrusion the body of rod of spout and set up in the body of rod and wear to locate the bolt of guide slot, the second spring set up in be used for keeping away from in the spout safety coupling's direction is right the elasticity is applyed to the body of rod, screwdriver detachably install in the body of rod.

The beneficial effects of the utility model reside in that: the tool holder can be quickly and conveniently installed on a tool magazine and a main shaft of the machine tool, the machining operation of screw locking through the CNC machine tool can be realized, and the application range of the CNC machine tool can be expanded. Therefore, the production efficiency can be improved, and the use requirements flexibly applicable to different types of products are met. In addition, the torque sensing module is matched with the wireless signal transmitter, so that the effect of online real-time detection of torque data can be achieved. Furthermore, set up in the shaft hole by borrowing from the moment of torsion sensing module, can prevent that pollutants such as greasy dirt or dust from getting into the shaft hole and causing interference and influence to moment of torsion sensing module to can promote moment of torsion sensing module sensing's stability and reliability by a wide margin.

Drawings

FIG. 1 is a perspective view of one embodiment of the torque tool of the present invention;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1;

FIG. 4 is a bottom view of the drive plate of FIG. 1;

FIG. 5 is a fragmentary side view of FIG. 1 illustrating the assembled relationship between the drive plate, the drive shaft, the wireless signal transmitter and the resiliently biased die structure;

FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 1;

FIG. 7 is a side view of the drive shaft and wireless signal transmitter of FIG. 1;

FIG. 8 is a cross-sectional view similar to FIG. 6 illustrating the ramp pushing the ball to slide within the bore;

FIG. 9 is a bottom view of the drive plate and the balls of FIG. 1 illustrating the drive plate contacting the balls at a second end surface; and

fig. 10 is a fragmentary side elevation similar to fig. 5.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1, which is an embodiment of the present invention, a torque tool 100 is adapted to be disposed in a tool magazine of a Computer Numerical Control (CNC) machine tool, and the torque tool 100 is configured similar to a CNC tool. The computer numerically controlled machine tool can invoke the torque tool 100 and mount it on the machine tool spindle so that the machine tool spindle can perform the task of locking the screw to the product via the torque tool 100.

Referring to fig. 2 and 3, the torque tool 100 includes a shank 1, a shank blind rivet 2, a transmission mechanism 3, and an output mechanism 4. The knife handle 1 is a BBT knife handle and is provided with a first screw hole 11, a second screw hole 12 opposite to the first screw hole 11 and two grooves 13 which are spaced from each other and communicated with the second screw hole 12. The tool holder blind rivet 2 is in threaded connection with the first screw hole 11 and is used for being installed on a main shaft of a machine tool, and the main shaft of the machine tool drives the tool holder 1 to rotate through the tool holder blind rivet 2.

The transmission mechanism 3 is disposed on the tool holder 1 and can be driven by the tool holder 1 to rotate, and the transmission mechanism 3 includes a transmission module 31, a transmission shaft 32, a plurality of steel balls 33, an elastic biasing module 34, an adjustment sleeve 35, a threaded sleeve 36, a torque sensing module 37, a wireless signal transmitter 38, and a plug 39. The transmission module 31 includes two elastic blocks 310, two connection pins 311, and a transmission disc 312. Each elastic block 310 is made of elastic material such as rubber, and the elastic blocks 310 are arc-shaped and have the same shape as the groove 13, and are clamped in the corresponding grooves 13. Each of the elastic blocks 310 is formed with a first insertion hole 313. A portion of each connection pin 311 is inserted into the first insertion hole 313 of the corresponding elastic block 310. The transmission disc 312 is disposed in the second threaded hole 12 and has a first end surface 314 and a second end surface 315 opposite to the first end surface 314. The transmission disc 312 is formed with a through hole 316 extending between the first end face 314 and the second end face 315. The first end surface 314 is recessed to form two second insertion holes 317, and each second insertion hole 317 is inserted by another portion of the corresponding connection pin 311.

Referring to fig. 2 and 4, the second end surface 315 of the driving plate 312 is recessed to form a plurality of slots 318 arranged in a ring shape at intervals, and each slot 318 is used for the corresponding ball 33 to be engaged. In this embodiment, the number of the locking grooves 318 is greater than the number of the steel balls 33, and the number of the locking grooves 318 is 9 as an example. The drive plate 312 defines two inclined surfaces 319 and two semi-circular arc surfaces 320 in each of the engaging slots 318, which are obliquely connected to the second end surface 315 and face each other. The two inclined surfaces 319 are spaced apart from each other for abutting against the corresponding steel ball 33, each inclined surface 319 is rectangular, and one short side thereof is connected to the second end surface 315. The inclined surfaces 319 of the plurality of slots 318 are arranged in a ring and form a circular track with the second end surface 315. Each semicircular arc surface 320 is connected between the corresponding long edges of the two inclined surfaces 319 and does not contact the corresponding steel ball 33.

Referring to fig. 2 and 3, the propeller shaft 32 has a shaft 321 and a flange 322. The axial direction of the shaft 321 extends in the Z direction, and the shaft 321 is hollow and has an inner peripheral surface 323, and the inner peripheral surface 323 defines a shaft hole 324. The axial bore 324 has a first open end 325 and a second open end 326 opposite the first open end 325. One part of the shaft 321 is inserted into the second screw hole 12 and the through hole 316 of the transmission disc 312, and the other part of the shaft is protruded out of the tool holder 1 to connect with the output mechanism 4. The first opening 325 is disposed in the through hole 316 for the plug 39 to pass through, and the second opening 326 is disposed outside the handle 1 for the wireless signal transmitter 38 to pass through. A flange 322 is protruded radially outward from the outer circumferential surface of the shaft 321, the flange 322 being adjacent to the first open end 325, one side of the flange 322 facing the second end surface 315 of the transmission disc 312, the flange 322 being formed with a plurality of through holes 327 arranged in a ring shape at intervals from each other.

Referring to fig. 2, 3 and 6, the number of the steel balls 33 and the number of the through holes 327 are the same, and 3 steel balls and 3 through holes are taken as examples. Each steel ball 33 is slidably inserted into the corresponding through hole 327, and the diameter of each steel ball 33 is larger than the thickness of the flange 322 and protrudes out of one side of the flange 322. Each steel ball 33 is guided by the corresponding through hole 327 and can slide only in the through hole 327 along the axial direction (i.e., Z direction) of the shaft 321. One side of each steel ball 33 protruding out of the flange 322 is detachably clamped in the corresponding clamping groove 318 and abuts against the two corresponding inclined surfaces 319.

The elastic biasing module 34 includes a first spring 341, a first pressing plate 342, a second pressing plate 343, and a bearing 344. The first spring 341 is a compression spring sleeved on the shaft 321 of the transmission shaft 32. Specifically, the first spring 341 of the present embodiment is a flat wire spring having a large ejection force and a small compression amount. The first pressing plate 342 is annular and is sleeved on the shaft 321 and located on the other side of the flange 322 opposite to the driving plate 312, one side of the first pressing plate 342 abuts on the other side of each steel ball 33 protruding out of the flange 322, and the other side of the first pressing plate 342 opposite to the steel balls 33 is abutted by one end of the first spring 341. The first spring 341 is used to apply an elastic force to the first pressing plate 342 in the direction of the steel balls 33 and the driving plate 312, so that each steel ball 33 can be pressed against the two inclined surfaces 319 in the corresponding slot 318. The second pressing plate 343 is annular and is disposed on the shaft 321 and abuts against the other end of the first spring 341. The bearing 344 is sleeved on the shaft 321 and abuts against the second pressing plate 343.

Referring to fig. 2 and 3, the adjustment sleeve 35 has an end wall 351 and a surrounding wall 352. The end wall 351 is formed with a through hole 353 through which the shaft 321 is inserted, and abuts against the bearing 344. The surrounding wall 352 protrudes from the outer periphery of the end wall 351 and is fitted around the outer peripheries of the first spring 341, the second presser plate 343, and the bearing 344. The surrounding wall 352 has an outer surface 354, a preset torque scale 355 formed on the outer surface 354 adjacent to the end wall 351, and external threads 356 formed on the outer surface 354 remote from the end wall 351. The preset maximum torque value that can be adjusted by the torque tool 100 of the present embodiment is, for example, in the range of 1 to 5N-m (Newton-meter), and thus, the plurality of scale values of the preset torque scale 355 are, for example, 1N-m, 1.5N-m, 2N-m, 2.5N-m, 3N-m, 3.5N-m, 4N-m, 4.5N-m, and 5N-m, respectively. The surrounding wall 352 is screwed to the second screw hole 12 of the tool shank 1 through the external thread 356, whereby the adjustment sleeve 35 can adjust the elastic force of the first spring 341 of the elastic biasing module 34 by screwing the length into the second screw hole 12 of the tool shank 1. When the adjusting sleeve 35 is screwed into the second threaded hole 12 of the tool holder 1 to a longer length, the compression amount of the first spring 341 compressed by the adjusting sleeve 35 is larger, whereby the preset torque value can be adjusted to be larger. When the adjusting sleeve 35 is screwed out of the second threaded hole 12 of the tool holder 1 by a longer length, the compression amount of the first spring 341 by the adjusting sleeve 35 is smaller, whereby the preset torque value can be adjusted to be smaller. A plurality of caulking grooves 357 are formed at the junction of the end wall 351 and the surrounding wall 352, and the caulking grooves 357 are used for a wrench (not shown) to be embedded, so that an operator can drive the adjusting sleeve 35 to rotate through the wrench to screw in or screw out the tool shank 1.

The screw sleeve 36 has an internal thread 361 screwed to the external thread 356 of the surrounding wall 352, a plurality of caulking grooves 362 formed on the outer surface, an abutting end 363 abutting against the tool shank 1, and an indicating end 364 opposite to the abutting end 363 for indicating a corresponding scale value. The slot 362 is used for a wrench (not shown) to engage. When the adjusting sleeve 35 is adjusted to the required maximum preset torque value, an operator can drive the screw sleeve 36 to rotate relative to the adjusting sleeve 35 through a wrench, so that the abutting end 363 of the screw sleeve 36 abuts against the tool shank 1. Through the design of the screw sleeve 36, the external thread 356 of the adjusting sleeve 35 can be completely screwed by the tool shank 1 and the screw sleeve 36 without exposure. Thereby, the adjusting sleeve 35 can be prevented from being loosened.

Referring to fig. 2, 3 and 7, the torque sensing module 37 is disposed in the shaft hole 324 of the transmission shaft 32 for sensing a torque variation generated by the transmission shaft 32 when the output mechanism 4 is subjected to a resistance force and generating a corresponding sensing signal. The torque sensing module 37 includes four strain gage elements 371 and wires 372. Each strain gauge unit 371 includes two strain gauges 373 adhered to the inner circumferential surface 323 of the shaft 321. When the shaft 321 of the transmission shaft 32 is subjected to pure torque, maximum tensile stress and maximum compressive stress are generated on inclined planes at 45 degrees and 135 degrees to the axis, and the shaft 321 generates micro deformation under the stress, one strain sheet 373 is attached to a position at 45 degrees to the axis of the shaft 321, and the other strain sheet 373 is attached to a position at 135 degrees to the axis of the shaft 321, so that the two strain sheets 371 can convert the micro deformation into resistance change.

In the present embodiment, the four strain gauge units 371 are arranged at intervals along the axial direction of the shaft 321, and each two adjacent strain gauge units 371 are spaced apart by 90 degrees around the axis of the shaft 321, so that the strain gauge units 371 can sense a small deformation of the shaft 321 in a wide range. The strain gauges 373 of the four strain gauge units 371 are connected by the conductive wires 372 to form a wheatstone bridge, and the wheatstone bridge can generate corresponding sensing signals according to the resistance change of the strain gauges 371. Therefore, higher sensing sensitivity and higher anti-interference capability can be obtained.

In the present embodiment, the four strain gauge units 371 are designed to improve the sensing accuracy. Of course, in other embodiments, the number of the strain gauge units 371 may be two, and the sensing effect can be achieved as well.

The wireless signal transmitter 38 is disposed through and sealed at the second opening end 326 of the shaft hole 324 of the transmission shaft 32. The wireless transmitter 38 has an antenna 381 protruding out of the second open end 326, external threads 382, and a circuit module 383. The wireless signal transmitter 38 is threadedly engaged with internal threads 328 of the shaft 321 formed on the inner circumferential surface 323 via external threads 382. The circuit module 383 is electrically connected between the antenna 381 and the wire 372 for receiving the sensing signal and converting the sensing signal into a corresponding wireless signal. The antenna 381 is used to transmit the wireless signal to an external receiver (not shown), and the external receiver will process, display and communicate with the computer numerical control machine tool after receiving the wireless signal, so as to implement the dead-cycle control of the whole process.

The plug 39 is inserted through and closes a first opening 325 of the shaft hole 324 of the transmission shaft 32. The plug 39 and the wireless signal transmitter 38 respectively close the first opening end 325 and the second opening end 326 of the shaft hole 324, so that the torque sensing module 37 can be packaged in the shaft hole 324, and the torque sensing module 37 is prevented from being interfered and influenced by the contaminants such as oil stains or dust entering the shaft hole 324, and the stability and reliability of sensing by the torque sensing module 37 can be greatly improved.

Referring to fig. 2 and 3, the output mechanism 4 includes a safety coupling 41, a connecting rod 42, a sliding rod 43, a screwdriver 44, and a second spring 45. The safety coupling 41 is formed with a mounting hole 411 therethrough and a plurality of voids 412 axially spaced apart and communicating with the mounting hole 411. The portion of the shaft 321 of the transmission shaft 32 protruding out of the end wall 351 penetrates through one end of the mounting hole 411, so that the antenna 381 of the wireless signal transmitter 38 is located in the mounting hole 411 and surrounded by the safety coupling 41. The safety coupling 41 is locked into the safety coupling 41 by lateral screws (not shown) so that the safety coupling 41 can clamp and fix the shaft 321. Because a portion of the wireless signal transmitter 38 is disposed through the shaft hole 324 of the shaft 321, and the portion of the antenna 381 protruding out of the second opening end 326 is disposed through the mounting hole 411 and surrounded by the safety coupling 41, the interference and influence of contaminants such as oil stains or dust on the wireless signal transmitter 38 can be greatly reduced. In addition, the wireless signal emitted from the antenna 381 can be smoothly emitted out of the safety coupling 41 through the gap 412 for receiving by an external receiver without being shielded by the safety coupling 41.

The connecting rod 42 is inserted into the mounting hole 411 through the other end thereof, and is locked into the safety coupling 41 by another lateral screw (not shown), so that the safety coupling 41 can clamp and fix the connecting rod 42. The connecting rod 42 is formed with a slide groove 421 and two guide grooves 422. The chute 421 extends in the Z direction. The two guide grooves 422 are respectively communicated with opposite sides of the sliding groove 421 and spaced apart from each other along a Y direction perpendicular to the Z direction. Each guide groove 422 has an elongated groove shape and a long direction thereof extends in the Z direction.

The sliding rod 43 has a rod body 431, a bolt 432, and a screw 433. The rod body 431 slidably penetrates through the sliding groove 421 and partially protrudes out of the sliding groove 421, and the rod body 431 is formed with a containing hole 434, a through hole 435 and a screw hole 436. The accommodation hole 434 extends in the Z direction. The through hole 435 extends along the Y direction and is connected to the two guide grooves 422. The screw hole 436 communicates with one side of the receiving hole 434. The pin 432 passes through the through hole 435 and the two guide grooves 422, and can slide along the length direction of the guide grooves 422. The screw 433 is screwed into the screw hole 436.

The screwdriver 44 is inserted into the receiving hole 434 of the rod body 431 and partially protrudes out of the receiving hole 434 to lock the screw on the product. The outer peripheral surface of the screwdriver 44 is recessed to form an annular groove 441 communicated with the screw hole 436, and the screwdriver 44 can be prevented from being separated from the accommodating hole 434 by clamping the screw 433 in the annular groove 441. When the screwdriver 44 is worn and is to be replaced, the screw 433 is unscrewed and removed from the annular groove 441, and the screwdriver 44 can be removed from the receiving hole 434 for replacement. The replaced screwdriver 44 is inserted into the receiving hole 434, and then the screw 433 is screwed into the annular groove 441 to complete the assembling operation. This makes it possible to easily and quickly perform the operation of detaching and assembling the screwdriver 44.

The second spring 45 is a compression spring disposed in the sliding slot 421 of the connecting rod 42, and is used for applying an elastic force to the rod body 431 in a direction away from the safety coupling 41. Therefore, the latch 432 can be held against the end surface of the guide groove 422 away from the safety coupling 41, so that the rod 431 and the screwdriver 44 are positioned as shown in fig. 3.

Because the calculator numerical control machine tool has high precision and rigidity, if the torque tool 100 has deviation of screw placement and positioning in the process of locking the screw, the torque tool 100 is subjected to great resistance, and even a collision accident may occur, therefore, the output mechanism 4 has the following deviation compensation function:

the safety coupling 41 can be flexibly deformed to allow a certain range of eccentricity or deflection angles on the plane in the X direction and the plane in the Y direction so as to compensate the deviation caused by the improper screw placement. When the torque tool 100 is accidentally stuck, the safety coupling 41 is damaged and broken first, so as to reduce the damage of the machine tool spindle caused by the influence of the torque tool 100.

By the design that the sliding rod 43 is slidably connected to the connecting rod 42 along the Z direction, when the screwdriver 44 of the torque tool 100 is blocked and the main shaft of the machine tool continuously drives the torque tool 100 to move downward along the Z direction, the sliding rod 43 can slide upward and retract into the sliding slot 421, so as to prevent the upward reaction force of the sliding rod 43 from being directly transmitted to the main shaft of the machine tool through the torque tool 100 and causing damage thereto.

Referring to fig. 3, 4 and 6, in the present embodiment, a product is described by taking a jig for clamping a workpiece as an example. When the machine tool is processed, the torque tool 100 is firstly called and installed on a main shaft of the machine tool, and the main shaft of the machine tool firstly locks a screw on a jig through the torque tool 100 so that the jig can clamp a workpiece. After the screw locking operation is completed, the machine tool transfers the cutting tool and installs the cutting tool on the main shaft of the machine tool, so that the main shaft of the machine tool performs cutting processing on the workpiece through the cutting tool.

In the process of locking the screw by the torque tool 100 driven by the main shaft of the machine tool, the main shaft of the machine tool first drives the torque tool 100 to move downward along the Z direction, so that the screwdriver 44 is inserted into the head of the screw. When the screwdriver 44 is inserted into the screw head and then stopped by the screwdriver, the connecting rod 42 can slide downwards relative to the sliding rod 43 to retract the sliding rod 43 into the sliding slot 421. Subsequently, the machine tool spindle drives the torque tool 100 in rotation in the direction of rotation R. The rotational driving force of the spindle of the machine tool is transmitted to the transmission disc 312 via the shank rivet 2, the shank 1, the elastic block 310 and the connecting pin 311 in sequence. The elastic block 310 can absorb an impact force generated at the moment when the tool spindle generates the rotational driving force, so that the elastic block 310 can uniformly transmit the rotational driving force to the transmission disc 312 through the connection pin 311.

When the torque generated by the transmission disc 312 transmitting the rotational driving force to the steel balls 33 is smaller than the preset maximum torque value of the torque tool 100, each steel ball 33 is engaged with the corresponding engaging groove 318 and abuts against the corresponding two inclined surfaces 319. At this time, the pushing force F1 exerted on the steel ball 33 by one of the inclined surfaces 319 in the locking groove 318 causes the steel ball 33 to drive the flange 322 of the transmission shaft 32 to rotate, so that the transmission shaft 32 rotates in the rotation direction R. The rotation of the transmission shaft 32 will drive the output mechanism 4 to rotate, so that the screwdriver 44 of the output mechanism 4 can drive the screw to rotate to screw into the product.

By defining two inclined surfaces 319 in each engaging groove 318 by the driving plate 312, the width of the inclined surfaces 319 is wide enough to ensure that each engaging groove 318 can reliably apply a pushing force F1 to the corresponding steel ball 33 via the inclined surfaces 319, so as to improve the uniformity of all the steel balls 33 under stress and the reliability of manufacturing.

By means of the through hole 327 design of the flange 322, the steel balls 33 can only apply torque to the inner circumferential surface defining the through hole 327, but cannot apply axial force parallel to the axial direction of the transmission shaft 32 to the flange 322, so that the transmission shaft 32 is not affected by the additional bending moment generated by the axial force. Thereby, the drive shaft 32 is only subjected to a pure torque for rotation. Since the force applied to the transmission shaft 32 is simple, the sensing accuracy of the torque sensing module 37 provided on the inner circumferential surface 323 of the transmission shaft 32 can be greatly improved. The torque sensing module 37 senses the torque variation of the transmission shaft 32 when the output mechanism 4 is subjected to resistance to generate a corresponding sensing signal, and the wireless signal transmitter 38 converts the received sensing signal into a wireless signal and transmits the wireless signal through the antenna 381 to be received by an external receiver, so that the effect of online real-time detection of torque data can be achieved.

Referring to fig. 8, 9 and 10, when the screw is locked to the product and reaches the position, the screwdriver 44 is blocked and cannot move downwards. At this time, the connecting rod 42 can slide downward relative to the sliding rod 43 to retract the sliding rod 43 into the sliding groove 421. Thereby, it is possible to prevent the upward reaction force of the slide lever 43 from being directly transmitted to the machine tool spindle through the torque tool 100 to cause damage thereto. Since the screwdriver 44 cannot rotate any more after the screw is locked, the transmission shaft 32 connected to the output mechanism 4 and the steel balls 33 inserted into the transmission shaft 32 cannot rotate any more. At this time, the torque generated when the driving plate 312 transmits the rotational driving force to the steel balls 33 is gradually increased.

When the torque value reaches the preset maximum torque value of the torque tool 100, the pushing force F1 applied to the steel ball 33 by the inclined surface 319 pushes the steel ball 33 away from the slot 318, so that the steel ball 33 slides in the through hole 327 along the Z direction and applies a pushing force F2 to the first pressing plate 342, and the first pressing plate 342 is driven by the pushing force F2 to move downward along the Z direction and compress the first spring 341. When the ball 33 is completely removed from the detent 318, the driving plate 312, which is continuously rotated in the rotation direction R, contacts the ball 33 at the second end surface 315 and rotates relative to the ball 33. Subsequently, when the driving plate 312 rotates to the next position where the locking groove 318 is aligned with the steel ball 33, the steel ball 33 is pressed back into the locking groove 318 by the first pressing plate 342 due to the elastic force exerted on the first pressing plate 342 by the first spring 341. The annular track formed by the inclined surface 319 of the engaging groove 318 and the second end surface 315 continuously rotates relative to the steel ball 33, so that the steel ball 33 repeatedly changes between the position of being engaged with the engaging groove 318 and the position of being abutted against the second end surface 315. Thereby, the drive disc 312 is allowed to idle relative to the drive shaft 32 to interrupt the transmission of torque. By the aforementioned idle rotation of the transmission disc 312 relative to the transmission shaft 32, it is possible to prevent the torque generated by the rotational driving force of the machine tool spindle from being continuously transmitted to the screw to lock it too tightly and cause damage to the product.

In summary, the torque tool 100 according to the present embodiment can be quickly and easily mounted on a tool magazine and a machine tool spindle of a machine tool by the tool holder 1, and can realize a machining operation for locking a screw by a CNC machine tool and expand the application range of the CNC machine tool. Therefore, the production efficiency can be improved, and the use requirements flexibly applicable to different types of products are met. In addition, the torque sensing module 37 and the wireless signal transmitter 38 are used together to achieve the effect of online real-time torque data detection. Furthermore, borrow by moment of torsion sensing module 37 and set up in shaft hole 324, can prevent to cause interference and influence to moment of torsion sensing module 37 in like pollutants such as greasy dirt or dust get into shaft hole 324 to can promote the stability and the reliability of moment of torsion sensing module 37 sensing by a wide margin, really can reach the utility model aims at.

Claims (10)

1. A torque tool, characterized by:

the torque tool comprises a tool handle, a transmission mechanism and an output mechanism, the transmission mechanism is installed in the tool handle and can be driven by the tool handle to rotate, the transmission mechanism comprises a transmission shaft, a torque sensing module and a wireless signal transmitter, the transmission shaft is fixedly connected with the output mechanism and is formed with a shaft hole, the torque sensing module is arranged in the shaft hole and is used for sensing the torque change generated when the output mechanism receives resistance and generating a corresponding sensing signal, the wireless signal transmitter is electrically connected with the torque sensing module and is used for receiving the sensing signal and outputting the corresponding wireless signal.

2. The torque tool of claim 1, wherein: the transmission shaft is provided with an inner circumferential surface for limiting the shaft hole, and the torque sensing module comprises two strain gauge units which are arranged on the inner circumferential surface and are arranged at intervals along the axial direction of the transmission shaft.

3. The torque tool of claim 1, wherein: the wireless signal emitter penetrates through and is sealed at one end of the shaft hole, the wireless signal emitter is provided with an antenna protruding out of one end of the shaft hole, and the output mechanism surrounds the antenna and is provided with a gap for the wireless signal to emit.

4. The torque tool of claim 1, wherein: the transmission shaft is provided with a shaft rod for limiting the shaft hole and a flange formed on the peripheral surface of the shaft rod, the flange is provided with a plurality of through holes which are arranged at intervals to form a ring, the transmission mechanism further comprises a transmission module, a pressing plate, a plurality of steel balls and a first spring, the transmission module is fixedly connected in the tool holder and positioned on one side of the flange and is provided with a plurality of clamping grooves which are arranged at intervals to form a ring, the pressing plate is sleeved on the shaft rod and positioned on the other side of the flange opposite to the transmission module, the steel balls respectively penetrate through the through holes in an axial direction of the shaft rod in a sliding manner and protrude out of two opposite sides of the flange, each steel ball can be detachably clamped in the corresponding clamping groove and abutted against one side of the pressing plate, and the first spring is sleeved on the shaft rod and abutted against the other side of the pressing plate opposite to the steel ball, the elastic force is applied to the pressing plate towards the steel balls and the transmission module.

5. The torque tool of claim 1, wherein: the transmission mechanism further comprises a transmission module, a plurality of steel balls and an elastic biasing module, the transmission module is fixedly connected in the tool shank and provided with an end face and a plurality of inclined faces obliquely connected to the end face, every two adjacent inclined faces are opposite, each steel ball slidably penetrates through the transmission shaft, the opposite sides of the steel balls are respectively abutted to the corresponding two adjacent inclined faces and the elastic biasing module, each steel ball can be driven by the corresponding two adjacent inclined faces to rotate and can be separated from the inclined faces, and the elastic biasing module is used for applying elastic force to the steel balls towards the direction of the transmission module.

6. The torque tool of claim 5, wherein: the inclined planes are arranged in a ring shape and form a circular track together with the end face, the transmission module can rotate relative to the steel balls through the circular track, the transmission module idles relative to the transmission shaft, each inclined plane is rectangular, and one short side of each inclined plane is connected to the end face.

7. The torque tool of claim 1, wherein: the transmission mechanism further comprises a transmission module, a plurality of steel balls, an elastic bias module and an adjusting sleeve, the transmission module is fixedly connected in the handle, each steel ball slidably penetrates through the transmission shaft, the opposite side of the steel ball is respectively and detachably clamped in the transmission module and abutted against one side of the elastic bias module, the adjusting sleeve is screwed in the handle and abutted against the other side, opposite to the steel ball, of the elastic bias module, the adjusting sleeve can adjust the elastic force of the elastic bias module through screwing in the length in the handle, and the adjusting sleeve is provided with an outer surface and preset torque scales formed on the outer surface.

8. The torque tool of claim 4, 5 or 7, wherein: the handle of a knife is formed with two recesses, drive module includes two elastic blocks, two connecting pins and driving disc, two the elastic block is blocked respectively in two the recess, two the connecting pin is connected respectively in two the elastic block with between the driving disc, the driving disc can liftoff block the steel ball.

9. The torque tool of claim 1, wherein: the wireless signal transmitter wears to locate the shaft hole has protruding the antenna of shaft hole one end of stretching out, output mechanism includes safety coupling, safety coupling connect fixedly in the transmission shaft just centers on the antenna sets up and is formed with the confession the space that wireless signal jetted out.

10. The torque tool of claim 9, wherein: output mechanism still includes connecting rod, slide bar, second spring and screwdriver, the connecting rod fixedly connect in safety coupling and be formed with the spout and with the guide slot of spout intercommunication, the spout with the guide slot is all followed the axial extension of transmission shaft, the slide bar has slidable ground to wear to locate spout and part protrusion the body of rod of spout and set up in the body of rod and wear to locate the bolt of guide slot, the second spring set up in be used for keeping away from in the spout safety coupling's direction is right the elasticity is applyed to the body of rod, screwdriver detachably install in the body of rod.

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