TWI808741B - Powered torque wrench with locked torsion - Google Patents

Abstract

A powered torque wrench with locked torsion comprises a casing, a transmission mechanism and a torsion mechanism. The transmission mechanism is inserted in the casing and is driven by a power source to rotate; the torsion mechanism comprises a torsion spring and an adjustment component, the torsion spring is disposed in the casing and is penetrated by the transmission mechanism, the adjustment component is movably assembled on the casing and is penetrated by the transmission mechanism, two ends of the torsion spring elastically abut against the casing and the adjustment component, movement of the adjustment component is capable of adjusting a torsion of the torsion spring on the casing, and the adjustment component comprises a positioning member for optionally locking the adjustment component and restricting its movement. Thereby, even if a user contacts with the adjustment component unintentionally during operation, a preset torque value will not be affected, ensuring that the parts are used under proper torsion.

Description

Power Torque Wrench with Locking Torque

The invention relates to a power torque wrench, in particular to a power torque wrench with locking torque.

For example, when parts such as screws, bolts or nuts leave the factory, the product or maintenance manual will indicate their torque requirements, but how to operate the parts according to the torque requirements, it is necessary to use a torque wrench that can display the torque value of the load in an electronic or mechanical structure to meet the requirements. The torque wrench can provide the user to set the torque according to the torque requirement, and then use the torque wrench to operate the parts.

However, according to the structure disclosed in Taiwan Patent No. M540019, the adjusting member is installed at the end of the body to set the torque. The position of the adjustment member is easy to accidentally touch and cause displacement during operation, so that the parts are not operated according to the originally set torque, and then the parts are damaged due to excessive locking or loose due to lack of locking.

The object of the present invention is to provide a power torque wrench with locking torque to solve the above mentioned difficulties in the prior art.

According to an embodiment of the present invention, a power torque wrench with locking torque is provided, comprising: a housing, which includes a first housing and a second housing, the first housing is inserted into the second housing, the front end of the first housing is exposed outside the second housing, an external thread is formed on the outer wall of the rear section of the second housing, and the second housing is inserted into the second housing. A first displacement hole is axially formed on the wall surface of the rear section of the shell, and the first displacement hole is formed continuously with the external thread. The first displacement hole overlaps with the external thread part. A second displacement hole is axially formed on the wall surface of the rear section of the second shell. The second displacement hole is located behind the first displacement hole. The front end of the transmission mechanism is eccentrically rotatable and assembled on the swing member, the rear end of the transmission mechanism is driven by a power source to rotate, the swing member swings with the eccentric rotation of the transmission mechanism, and the rotation member rotates with the swing of the swing member, the stop seat is pierced by the rear end of the transmission mechanism, the part that passes through is driven by the power source and rotates, the part that does not pass through is sleeved with a bearing, and the rear end of the transmission mechanism is rotatably assembled on the stop seat; It includes a torsion spring and an adjustment member, the torsion spring is arranged in the second housing, and the torsion spring is penetrated by the transmission mechanism, the adjustment member is movably assembled on the second housing, and the adjustment member is penetrated by the transmission mechanism, the two ends of the torsion spring bounce against the rear end of the first housing and the front end of the adjustment member respectively, the movement of the adjustment member will adjust the torsion force of the torsion spring to the first housing, and the adjustment member includes a positioning member, which is used to selectively lock the adjustment member and restrict its movement.

In this way, through the structures of the above embodiments, the above-mentioned power torque wrench will not affect the set torque value even if the user accidentally touches it during operation, ensuring that the parts are used under an appropriate torque, and the parts will not be damaged due to too tight locks or loosened due to lack of locks.

The above description is only used to illustrate the problems to be solved by the present invention, the technical means for solving the problems, and the effects thereof, etc. The specific details of the present invention will be introduced in detail in the following embodiments and related drawings.

[this invention]

10: Power torque wrench

20: shell

20A: screw

21: First Shell

211: The first storage unit

22: second shell

221: Second storage part

222: external thread

223: The first displacement hole

224: Second displacement hole

225: block seat

30: ratchet mechanism

31: swing member

32: Rotating member

40: Transmission mechanism

41: The first transmission rod

411: concave part

42: Second transmission rod

421: Bearing

43: shaft pin

P: power source

50: Support mechanism

60: Sound Mechanism

70:Torsion mechanism

71: torsion spring

72:Adjust components

73: Active parts

731: internal thread

732: embossed

733: limit pin

734: slot

735: jack

736: Latch

737: block

738: slot

74: The first passive element

741: slot

75: The second passive element

751: Latch

752: external thread

753: limit pin

754: jack

755: block

76: Positioning piece

761: Embossed

762: internal thread

77: Auxiliary spring

Figure 1: A three-dimensional schematic diagram of the power torque wrench of the present invention.

Figure 2: An exploded perspective view of the power torque wrench of the present invention.

Fig. 3: Combined cross-sectional view and first action state diagram of the power torque wrench of the present invention.

Fig. 4: Combination section view and second action state diagram of the power torque wrench of the present invention.

Fig. 5: Combination section view and third action state diagram of the power torque wrench of the present invention.

In order to enable your examiner to have a further understanding of the present invention, the preferred embodiments are hereby given in conjunction with the drawings, and are described in detail as follows:

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , the power torque wrench 10 includes a housing 20 , a ratchet mechanism 30 , a transmission mechanism 40 , a support mechanism 50 , a sound mechanism 60 and a torque mechanism 70 .

The casing 20 includes a first shell 21 and a second shell 22 , and the first shell 21 and the second shell 22 are coaxially assembled. The first shell 21 is hollow tubular and has a first accommodating portion 211 axially formed therein. The second shell 22 is also hollow tubular, and has a second housing portion 221 formed in the axial direction. The diameter of the second housing 22 is larger than the diameter of the first shell 21, so that the first shell 21 is inserted into the second shell 22. The front end of the first shell 21 is exposed outside the second shell 22. The first housing portion 211 of the first housing 21 overlaps with the front section of the second housing portion 221 of the second housing 22. The cooperation relationship will be explained later.

The first shell 21 and the second shell 22 are pivotally connected to each other. The pivot connection is to utilize two screws 20A facing each other to lock toward the front end of the second shell 22 and the unexposed part near the front end of the first shell 21, but a collar (not shown) is set between the side wall of the second shell 22 and the screw 20A.

External threads 222 are formed on the outer wall surface of the rear section of the second shell 22 . A first displacement hole 223 is axially formed on the wall surface of the rear section of the second shell 22 . The number of the first displacement holes 223 is at least one, preferably two, and are arranged at intervals from each other. The first displacement hole 223 is formed following the external thread 222 , and the first displacement hole 223 partially overlaps with the external thread 222 . A second displacement hole 224 is axially formed on the rear wall of the second shell 22 , and the number of the second displacement hole 224 is one. The second displacement holes 224 are located behind the first displacement holes 223 , and are arranged offset from each other and not on the same axis. The cooperation relationship between the external thread 222, the first displacement hole 223, the second displacement hole 224 and the torque mechanism 70 will be described later. The rear end of the second housing 22 is locked with a retaining seat 225, and the cooperation relationship between the retaining seat 225 and the transmission mechanism 40 will be described later.

The ratchet mechanism 30 is disposed at the front end of the first shell 21 and exposed outside the front end of the second shell 22 . The ratchet mechanism 30 includes a rocking member 31 and a rotating member 32 , the rocking member 31 is pivotally assembled at the front end of the first shell 21 , and the rotating member 32 is rotatably assembled at the front end of the rocking member 31 .

The transmission mechanism 40 is inserted in the housing 20, the front end of the transmission mechanism 40 is eccentrically rotatable and assembled on the swing member 31, the rear end of the transmission mechanism 40 is driven by the power source P (such as pneumatic) to rotate, the swing member 31 swings with the eccentric rotation of the transmission mechanism 40, and the rotating member 32 rotates clockwise or counterclockwise with the swing of the swing member 31.

The transmission mechanism 40 includes a first transmission rod 41 , a second transmission rod 42 and a pivot pin 43 , the first transmission rod 41 and the second transmission rod 42 are cylinders, and the first transmission rod 41 and the second transmission rod 42 are coaxially assembled. The first transmission rod 41 and the second transmission rod 42 are inserted in the housing 20, so that the first transmission rod 41 is arranged in the first accommodating portion 211 of the first shell 21, the second transmission rod 42 is located behind the first transmission rod 41, the second transmission rod 42 is arranged in the rear section of the second accommodating portion 221 of the second casing 22, and the front end portion of the second transmission rod 42 is arranged in the first accommodating portion 211 of the first casing 21.

The front end of the first transmission rod 41 is eccentrically rotatable assembled on the rocking member 31. The rear end of the first transmission rod 41 and the front end of the second transmission rod 42 are assembled in a detachable manner. The rear end of the first transmission rod 41 is axially extended with a concave portion 411.

The rear end of the second transmission rod 42 is driven by the power source P to rotate, the first transmission rod 41 rotates with the second transmission rod 42, the swing member 31 swings with the eccentric rotation of the first transmission rod 41, and the rotating member 32 rotates clockwise or counterclockwise with the swing of the swing member 31. In particular, the swinging direction of the swinging member 31 intersects with the locking direction of the two screws 20A of the casing 20 .

The stop seat 225 of the second housing 22 is pierced by the rear end of the second transmission rod 42 , and the pierced part is driven by the power source P to rotate.

The support mechanism 50 is detachably assembled on the housing 20 , so that the transmission mechanism 40 is supported by the support mechanism 50 when rotating. The support mechanism 50 is used to support the rotational movement and reduce friction loss.

The front end of the sound mechanism 60 is assembled on the rear end of the first shell 21 , and the second transmission rod 42 of the transmission mechanism 40 is passed through, so that the sound mechanism 60 is disposed in the rear section of the second accommodating portion 221 of the second shell 22 . The sound mechanism 60 provides sound reminder operation to prevent the torque from exceeding the setting.

The torsion mechanism 70 is movably assembled on the second shell 22 , and the movement of the torsion mechanism 70 will adjust the torsion to the sound mechanism 60 . The torsion mechanism 70 includes a torsion spring 71 and an adjustment member 72 . The torsion spring 71 is disposed in the rear section of the second accommodating portion 221 of the second housing 22 and is passed through by the second transmission rod 42 . The adjustment member 72 is movably assembled on the second shell 22 and passed through by the second transmission rod 42 . Two ends of the torsion spring 71 bounce against the rear end of the sound mechanism 60 and the front end of the adjustment member 72 respectively, and the movement of the adjustment member 72 will adjust the torsion force of the torsion spring 71 on the sound mechanism 60 . Another state is when the power torque wrench 10 does not cooperate with the sound mechanism 60, The two ends of the torsion spring 71 bounce against the rear end of the first case 21 and the front end of the adjustment member 72 respectively, and the movement of the adjustment member 72 will adjust the torsion force of the torsion spring 71 on the first case 21 .

Please refer to FIG. 3 , FIG. 4 and FIG. 5 . The adjusting member 72 includes a driving element 73 , a first passive element 74 , a second passive element 75 , a positioning element 76 and an auxiliary spring 77 . The active part 73 is movably assembled on the outer wall surface of the second shell 22, and is linked with the first passive part 74 and the second passive part 75. When the active part 73 moves on the second shell 22, the first passive part 74 will be linked to move in the second shell 22, and the second passive part 75 will be linked to move on the second shell 22. The movement of the first passive member 74 will adjust the torsion force of the torsion spring 71 on the sound mechanism 60 , that is to say, loosening or tightening the torsion spring 71 will determine the magnitude of the torsion force on the sound mechanism 60 . Another state is when the power torque wrench 10 does not cooperate with the sound mechanism 60, the movement of the first passive member 74 will adjust the torsion of the torsion spring 71 to the first shell 21, that is to say, loosening or tightening the torsion spring 71 will determine the magnitude of the torsion to the first shell 21. The positioning part 76 is movably assembled on the second passive part 75 , and the positioning part 76 is used for selectively locking the driving part 73 of the adjustment member 72 to limit its movement. The auxiliary spring 77 provides elastic force for the movement of the first passive member 74 .

The active part 73 is a hollow body, and the active part 73 is movably assembled on the outer wall of the second shell 22 . Internal threads 731 are formed on the inner wall surface of the front end of the driving member 73 , and the driving member 73 is sheathed on the second shell 22 so that the internal threads 731 and the external threads 222 engage with each other. When the active member 73 is rotated to move, the active member 73 can move forward or backward on the second shell 22 .

Embossing 732 is formed on the outer wall surface of the front end of the active part 73 , and the embossing 732 is easy for the user to identify and facilitate the user to apply force.

The inner side wall between the front and rear ends of the active member 73 protrudes inwardly to limit the limit pin 733, which is inserted in the first displacement hole 223 of the second shell 22, thereby limiting the displacement direction and displacement of the active member 73 in the second shell 22. journey. The limit pin 733 is a cylinder, and the number of the limit pin 733 is at least one, preferably two, and are arranged at intervals from each other.

The active part 73 can be formed with a slot 734 on the inner side wall between the front and rear ends, and this slot 734 is used for inserting one end of the limiting pin 733, so that the other end of the limiting pin 733 protrudes inward and is inserted in the first displacement hole 223 of the second shell 22.

The active part 73 can also be formed with a jack 735 from the outer side wall between the front and rear ends inwardly. This jack 735 is for the stopper pin 733 to be inserted from the outside to the inside. In hole 223. The cooperation relationship between the limiting pin 733 in the insertion hole 735 and the first passive element 74 will be described later.

The selection of the quantity of the limiting pin 733 needs to be matched with the quantity of the first displacement hole 223. When one limiting pin 733 is used, one first displacement hole 223 is used. When two limit pins 733 are used, two first displacement holes 223 are matched, and the active member 73 can use the slot 734 and the insertion hole 735 at the same time, and the slot 734 and the insertion hole 735 are spaced apart from each other.

The outer wall surface of the active part 73 between the front and rear ends is formed with a stop part 737 with an enlarged diameter. The protruding thickness of the stop part 737 allows enough working space to be reserved for the limit pin 733, the slot 734 and the jack 735. The cooperation relationship between the stop part 737 and the second passive part 75 and the positioning part 76 will be described later.

A ring-shaped slot 738 is formed on the outer wall surface of the rear end of the active part 73, and the relationship between the slot 738 and the second passive part 75 will be described later.

The first passive member 74 is a hollow body, and the first passive member 74 is movably assembled on the inner wall surface of the second housing 22 and penetrated by the second transmission rod 42 . Two ends of the torsion spring 71 bounce against the rear end of the sound mechanism 60 and the front end of the first passive element 74 respectively. Another state is that the power torque wrench 10 does not cooperate with the sound mechanism 60 At this time, the two ends of the torsion spring 71 bounce against the rear end of the first shell 21 and the front end of the first passive element 74 respectively, and the movement of the first passive element 74 will adjust the torsion force of the torsion spring 71 on the first shell 21 .

The outer wall surface of the first passive part 74 is radially formed with a slot 741, and the slot 741 is used for inserting the stop pin 733 of the active part 73 in the socket 735, so that the first passive part 74 and the active part 73 are interlocked with each other through the stop pin 733. As long as the active part 73 located on the outside of the second shell 22 is rotated, the first passive part 74 inside the second shell 22 will be driven at the same time.

The second passive element 75 is a hollow body, the front end of the second passive element 75 is sheathed on the active element 73 , and the front end of the second passive element 75 abuts against the blocking portion 737 of the active element 73 . In order to make the second passive element 75 and the active element 73 interlock with each other, the pin 751 is inserted from the outer wall surface between the front end and the rear end of the second passive element 75 , and the slot 738 of the active element 73 passes through. As long as the driving element 73 outside the second shell 22 is rotated, the second passive element 75 outside the second shell 22 will be driven simultaneously. The outer wall surface of the front end of the second driven member 75 is formed with external threads 752 , and the relationship between the external threads 752 and the positioning member 76 will be described later.

The inner side wall of the rear end of the second passive element 75 protrudes inwardly to limit the limiting pin 753 , and is inserted into the second displacement hole 224 of the second shell 22 , thereby limiting the displacement direction and displacement stroke of the second passive element 75 in the second shell 22 . An insertion hole 754 can be formed through the second passive member 75 from the outer side wall of the rear end inward, and the insertion hole 754 is used for inserting the limiting pin 753 from the outside to the inside. In order to limit the limit pin 753 in the socket 754, the inner wall of the socket 754 is formed with threads and the outer wall of the limit pin 753 is formed with threads to engage with each other, preventing the limit pin 753 from falling out of the socket 754, so that the limit pin 753 can only protrude inward and be inserted in the second displacement hole 224 of the second shell 22.

The rear end of the second passive member 75 is formed with a stop portion 755 with an enlarged diameter. The stop portion 755 of the second passive member 75 is opposite to the stop portion 737 of the active member 73. The protruding thickness of the stop portion 755 allows sufficient working space for the limit pin 753 and the socket 754. The cooperation between the stop portion 755 and the positioning member 76 will be described later.

The positioning member 76 is a hollow body with embossing 761 formed on its outer wall surface, and the embossing 761 is easy for the user to identify and facilitate the user to apply force. Internal threads 762 are formed on the inner wall of the positioning member 76 , and the positioning member 76 is sheathed on the second passive member 75 so that the internal threads 762 and the external threads 752 engage with each other. When the positioning member 76 is rotated to move, the active member 73 can move (forward or backward) on the second passive member 75 to selectively lock the active member 73 of the adjustment member 72 to limit its movement.

Please refer to FIG. 3 , when the positioning member 76 chooses to retreat against the stopper 755 of the second passive member 75, the active member 73 is not locked and positioned by the positioning member 76, and the first passive member 74 linked with the active member 73 can still be moved by the active member 73 to adjust the torsion force of the torsion spring 71 on the sound mechanism 60.

Please refer to FIG. 4 , when the positioning member 76 chooses to advance against the stop portion 737 of the active member 73, the active member 73 has been locked and positioned by the positioning member 76. At this time, the first passive member 74 linked with the active member 73 cannot be moved by the active member 73 to adjust the torsion force of the torsion spring 71 on the sound mechanism 60. Therefore, even if the user touches it by mistake during operation, it will not affect the set torque value, ensuring that the parts are used under proper torque.

The auxiliary spring 77 is disposed in the rear section of the second accommodating portion 221 of the second housing 22 and is passed through by the second transmission rod 42 . Two ends of the auxiliary spring 77 bounce against the rear end of the first passive element 74 and the front end of the retaining seat 225 respectively. When the first passive element 74 moves with the active element 73 , in addition to the force exerted by the user on the first passive element 74 , the auxiliary spring 77 provides additional elastic force for the first passive element 74 , allowing the user to operate more effortlessly.

To sum up, even if the user accidentally touches the power torque wrench 10 during operation, it will not affect the set torque value, ensuring that the parts are used under proper torque. In this way, through the structures described in the above embodiments, the present invention will not cause damage due to too tight locking or loosening due to lack of locking.

Finally, the above-disclosed embodiments are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. can be protected in the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

10: Power torque wrench

20: Shell

21: First Shell

22: second shell

222: external thread

223: The first displacement hole

224: Second displacement hole

225: block seat

30: ratchet mechanism

31: swing member

32: Rotating member

40: Transmission mechanism

42: Second transmission rod

421: Bearing

50: Support mechanism

72:Adjust components

73: Active parts

731: internal thread

732: embossed

733: limit pin

735: jack

736: Latch

737: block

738: slot

75: The second passive element

751: Latch

752: external thread

753: limit pin

754: jack

755: block

76: Positioning piece

761: Embossed

762: internal thread

77: Auxiliary spring

Claims (13)

A power torque wrench with locking torque, comprising: a casing (20), which includes a first casing (21) and a second casing (22), the first casing (21) is inserted into the second casing (22), the front end of the first casing (21) is exposed outside the second casing (22), an external thread (222) is formed on the outer wall surface of the rear section of the second casing (22), and a first displacement hole (22) is axially formed on the rear wall surface of the second casing (22) 3), the first displacement hole (223) is formed following the external thread (222), the first displacement hole (223) partially overlaps the external thread (222), and a second displacement hole (224) is axially formed on the wall surface of the rear section of the second shell (22). The second displacement hole (224) is located behind the first displacement hole (223). member (31) and a rotating member (32), the swinging member (31) can be assembled at the front end of the first shell (21) eccentrically, and the rotating member (32) can be assembled at the front end of the swinging member (31) rotatably; Rotate, the swing member (31) swings with the eccentric rotation of the transmission mechanism (40), and the rotation member (32) rotates with the swing of the swing member (31). The stop seat (225) is pierced by the rear end of the transmission mechanism (40), and the part that passes through is driven by the power source (P) to rotate, and the part that is not pierced is sleeved with a bearing (421), and the rear end of the transmission mechanism (40) is rotatably assembled on the stop seat (225); And a torsion mechanism (70), which includes a torsion spring (71) and an adjustment member (72), the torsion spring (71) is arranged in the second housing (22), and the torsion spring (71) is controlled by the transmission mechanism (40) piercing, the adjustment member (72) is movably assembled on the second shell (22), and the adjustment member (72) is penetrated by the transmission mechanism (40), and the two ends of the torsion spring (71) respectively bounce against the rear end of the first shell (21) and the front end of the adjustment member (72), the movement of the adjustment member (72) will adjust the torque of the torsion spring (71) to the first shell (21), and the adjustment member (72) includes a positioning piece (7 6), the positioning piece (76) is used to selectively lock the adjustment member (72) and thereby limit its movement. The power torque wrench with locking torque as described in claim 1, wherein the first shell (21) and the second shell (22) are pivotally connected to each other, and the shell (20) further includes two screws (20A). The two screws (20A) are opposite to each other and locked towards the front end of the second shell (22) and the unexposed part of the first shell (21) near the front end. A collar is sleeved between the side wall of the second shell (22) and the two screws (20A). ) The locking direction of the two screws (20A) intersects with the swinging direction of the swinging member (31). The power torque wrench with locking torque as described in claim 1, wherein, the transmission mechanism (40) includes a first transmission rod (41), a second transmission rod (42) and a pivot pin (43), the first transmission rod (41) and the second transmission rod (42) are inserted in the housing (20), the front end of the first transmission rod (41) is eccentrically rotatable and assembled on the swing member (31), and the rear end of the first transmission rod (41) extends axially. part (411), the recess (411) is inserted for the front end of the second transmission rod (42), and the shaft pin (43) is radially inserted into the two opposite side walls of the recess (411) and the front end of the second transmission rod (42). The power torque wrench with locking torque as described in claim 1, further comprising a support mechanism (50), which is detachably assembled on the housing (20), and the transmission mechanism (40) is supported by the support mechanism (50) when rotating. The power torque wrench with locking torque as described in claim 1, wherein it further includes a sound mechanism (60), the front end of which is assembled on the rear end of the first shell (21), the sound mechanism (60) is pierced by the transmission mechanism (40), the sound mechanism (60) is arranged in the second shell (22), the rear end of the sound mechanism (60) is bounced by the torsion spring (71), and the movement of the adjustment member (72) will adjust the torsion spring (71 ) the torque of the sound mechanism (60). The power torque wrench with locking torque as described in claim 1, wherein the adjustment member (72) further includes a driving part (73), the driving part (73) is a hollow body, the driving part (73) is movably assembled on the outer wall surface of the second shell (22), the inner wall surface of the front end of the driving part (73) forms an internal thread (731), the driving part (73) is sleeved on the second shell (22), the internal thread (731), the The external threads (222) are engaged with each other, and an embossing (732) is formed on the outer wall surface of the front end of the active member (73). A limit pin (733) protrudes inward from the inner wall surface between the front and rear ends of the active member (73), which is inserted in the first displacement hole (223) of the second shell (22). A slot (738) is formed on the outer wall surface of the end. The power torque wrench with locking torque as described in claim 6, wherein a slot (734) is formed on the inner wall surface between the front and rear ends of the active member (73), the slot (734) is used for inserting one end of the limit pin (733), and the other end of the limit pin (733) protrudes inward and is inserted in the first displacement hole (223) of the second shell (22). The power torque wrench with locking torque as described in claim 6, wherein, the outer wall between the front and rear ends of the driving member (73) faces inward and forms a socket (735), the socket (735) is used for the insertion of the limit pin (733) from the outside to the inside, and the limit pin (733) protrudes inward and is inserted in the first displacement hole (223) of the second shell (22). The power torque wrench with locking torque as described in claim 6, wherein the adjustment member (72) further includes a first passive part (74), the first passive part (74) is a hollow body, the first passive part (74) is movably assembled on the inner wall surface of the second shell (22), and the first passive part (74) is passed through by the transmission mechanism (40), the front end of the first passive part (74) is bounced by the torsion spring (71), the first passive part (74) 4) A slot (741) is radially formed on the outer wall surface, and the slot (741) is inserted for the stop pin (733) of the active part (73), so that the first passive part (74) and the active part (73) are interlocked through the stop pin (733). The power torque wrench with locking torque as described in claim 9, wherein the adjustment member (72) further includes a second passive part (75), the second passive part (75) is a hollow body, the front end of the second passive part (75) is sleeved on the active part (73), and the front end of the second passive part (75) abuts against the stop part (737) of the active part (73), and a plug is inserted on the outer wall surface between the front and rear ends of the second passive part (75). Pin (751), the latch (751) passes through the slot (738) of the active part (73), an external thread (752) is formed on the outer wall of the front end of the second passive part (75), and a limit pin (753) protrudes inward from the inner side wall of the rear end of the second passive part (75), which is inserted in the second displacement hole (224) of the second shell (22). 755), the blocking portion (755) of the second passive element (75) and the blocking portion (737) of the active element (73) are opposite to each other. The power torque wrench with locking torque as described in claim 10, wherein, the outer side wall of the rear end of the second driven member (75) faces inward and forms a socket (754) through which the limit pin (753) is inserted from the outside to the inside, and the limit pin (753) protrudes inward and is inserted in the second displacement hole (224) of the second shell (22). The power torque wrench with locking torque as described in claim 10, wherein the positioning piece (76) of the adjustment member (72) is a hollow body, and the positioning piece (76) is movably assembled on the second passive piece (75), and an embossing (761) is formed on the outer wall surface of the positioning piece (76), and an internal thread (762) is formed on the inner wall surface of the positioning piece (76), and the positioning piece (76) is sleeved on the second passive piece (75) , the internal thread (762) and the external thread (752) are engaged with each other, and the positioning member (76) moves on the second passive member (75) to selectively lock the active member (73) of the adjustment member (72) and then limit its movement. The power torque wrench with locking torque according to claim 12, wherein the adjustment member (72) further includes an auxiliary spring (77), which is arranged in the second housing (22), and the auxiliary spring (77) is passed through by the transmission mechanism (40), and the two ends of the auxiliary spring (77) bounce against the rear end of the first passive part (74) and the front end of the stopper (225) respectively.

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