TW202342243A - 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 present invention relates to a power torque wrench, and in particular to a power torque wrench with locking torque.

When screws, bolts, nuts and other parts leave the factory, the product or maintenance manual will indicate the torque requirements. However, how to operate the parts according to the torque requirements requires the use of a torque that can electronically or mechanically express the torque value of the load. wrench to meet the requirements. The torque wrench allows the user to set the torque according to the torque requirements, and then use the torque wrench to operate the parts.

However, according to the structure disclosed in Taiwan Patent No. M540019, an adjustment member is provided at the end of the body for setting the torque. The position is easy to accidentally touch and cause displacement during operation, so that the parts are not operated according to the originally set torque, thereby causing parts failure. The lock may be damaged if it is too tight, or it may become loose if it is not locked tightly.

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

According to an embodiment of the present invention, a power torque wrench with locking torque is provided, which includes: a housing including a first housing and a second housing, the first housing is inserted into the second housing, and the third housing is inserted into the second housing. The front end of a shell is exposed outside the second shell; a ratchet mechanism includes a rocking member and a rotating member. The rocking member is swingably assembled at the front end of the first shell, and the rotating member is rotatably assembled at the swinging member. The front end of the component; a transmission mechanism, which is inserted into the housing. The front end of the transmission mechanism can be eccentrically rotated and assembled on the swing member. The rear end of the transmission mechanism rotates driven by a power source. The swing member follows the The transmission mechanism rotates eccentrically and swings, and the rotating member rotates as the swinging member swings; and a torsion mechanism includes a torsion spring and an adjustment member, the torsion spring is disposed in the second shell, and the torsion spring The adjustment member is pierced by the transmission mechanism, and the adjustment member is movably assembled on the second shell. The adjustment member is pierced by the transmission mechanism, and the two ends of the torsion spring spring against the rear end of the first shell and the adjustment member respectively. At the front end, the movement of the adjustment member will adjust the torsion force of the torsion spring on the first shell. The adjustment member includes a positioning member for selectively locking the adjustment member and thereby limiting its movement.

In this way, through the structure described in the above embodiments, even if the user accidentally touches the above-mentioned power torque wrench during the operation, it will not affect the set torque value, ensuring that the parts are used under appropriate torque, and there is no It may happen that parts are damaged due to being locked too tightly or loosened due to not being locked tightly.

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

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

Please refer to Figures 1, 2 and 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 housing 20 includes a first shell 21 and a second shell 22. The first and second shells 21 and 22 are coaxially assembled. The first shell 21 is hollow tubular, and has a first accommodating portion 211 formed in the axial direction. The second shell 22 is also hollow tubular, and has a second receiving portion 221 formed in the axial direction. The diameter of the second shell 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 accommodating part 211 of the first shell 21 overlaps with the front section of the second accommodating part 221 of the second shell 22. The second accommodating part 221 of the second shell 22 The cooperation relationship between the rear section and the sound mechanism 60 and the torsion mechanism 70 will be explained later.

The first and second shells 21 and 22 are pivotally connected to each other. The pivotal connection is made by using two screws 20A to face each other and lock toward the front end of the second shell 22 and the first shell 21 near the front end where the front end is not exposed. However, in the second shell There is a collar (not shown) between the side wall of 22 and the screw 20A. Therefore, the screw 20A can be regarded as the fulcrum of the first shell 21 on the second shell 22. That is to say, when the front end of the first shell 21 swings under force, , the rear end of the first shell 21 also swings accordingly.

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

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

The transmission mechanism 40 is inserted into the housing 20. The front end of the transmission mechanism 40 can be eccentrically rotated 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 follows the transmission. The mechanism 40 rotates eccentrically and swings, and the rotating member 32 rotates clockwise or counterclockwise as the rocking member 31 swings.

The transmission mechanism 40 includes a first transmission rod 41, a second transmission rod 42 and a shaft pin 43. The first and second transmission rods 41 and 42 are cylinders, and the first and second transmission rods 41 and 42 are coaxially assembled. The first and second transmission rods 41 and 42 are inserted into the housing 20 so that the first transmission rod 41 is disposed in the first receiving portion 211 of the first housing 21 and the second transmission rod 42 is located in the first transmission rod 41 Afterwards, the second transmission rod 42 is disposed in the rear section of the second accommodating portion 221 of the second housing 22 , and the front end portion of the second transmission rod 42 is disposed in the first accommodating portion 211 of the first housing 21 .

The front end of the first transmission rod 41 is assembled on the swing member 31 in an eccentrically rotatable manner. The rear end of the first transmission rod 41 and the front end of the second transmission rod 42 are detachably assembled. The detachable assembly is the rear end of the first transmission rod 41 . A recess 411 extends axially from the end. This recess 411 is for the front end of the second transmission rod 42 to be inserted. Then, the shaft pin 43 is used to radially insert the two opposite side walls of the recess 411 and the front end of the second transmission rod 42.

The rear end of the second transmission rod 42 rotates driven by the power source P, 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 follows the rotation of the second transmission rod 42. The rocking member 31 swings to rotate clockwise or counterclockwise. In particular, the swing direction of the swing member 31 intersects with the locking direction of the two screws 20A of the housing 20 .

The stopper 225 of the second shell 22 is penetrated by the rear end of the second transmission rod 42, and the part that is penetrated is driven by the power source P to rotate. The part that is not penetrated is covered with a bearing 421, so that the second transmission rod 42 can Rotated and assembled on the block 225.

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 rotational motion and reduce friction loss.

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

The torque mechanism 70 is movably assembled on the second shell 22 , and the movement of the torque mechanism 70 will adjust the torque on 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 receiving portion 221 of the second housing 22 and is penetrated by the second transmission rod 42 . The adjusting member 72 is movably assembled on the second housing 22 and is penetrated by the second transmission rod 42 . The two ends of the torsion spring 71 spring against the rear end of the sound mechanism 60 and the front end of the adjustment member 72 respectively. The movement of the adjustment member 72 will adjust the torsion force of the torsion spring 71 on the sound mechanism 60 . In another state, when the power torque wrench 10 does not cooperate with the sound mechanism 60, the two ends of the torsion spring 71 respectively spring against the rear end of the first shell 21 and the front end of the adjusting member 72. The movement of the adjusting member 72 will adjust the torsion spring 71 to the first. A shell of 21 torque.

Please refer to FIGS. 3 , 4 and 5 . The adjustment member 72 includes an active part 73 , a first passive part 74 , a second passive part 75 , a positioning part 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 and second passive parts 74 and 75. When the active part 73 moves on the second shell 22, it will link the first passive part 74 on the second shell 22. The inside of the second shell 22 moves, and the second passive member 75 moves on the second shell 22 in conjunction. The movement of the first driven member 74 will adjust the torque exerted by the torsion spring 71 on the sound mechanism 60 , that is to say, loosening or tightening the torsion spring 71 will determine the torque exerted 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 part 74 will adjust the torque of the torsion spring 71 on the first shell 21, that is to say, loosening or tightening the torsion spring 71 will determine the torque of the torsion spring 71. The first shell 21 torque size. The positioning member 76 is movably assembled on the second passive member 75. The positioning member 76 is used to selectively lock the active member 73 of the adjustment member 72 and thereby limit its movement. The auxiliary spring 77 provides elastic force when the first driven member 74 moves.

The active part 73 is a hollow body, and the active part 73 is movably assembled on the outer wall surface of the second shell 22 . An internal thread 731 is formed on the inner wall surface of the front end of the driving member 73. The driving member 73 is sleeved on the second shell 22 so that the internal and external threads 731 and 222 mesh with each other. When the active member 73 is rotated and moved, the active member 73 can move forward or backward in the second housing 22 .

An embossed pattern 732 is formed on the outer wall surface of the front end of the active component 73. The embossed pattern 732 is easy for the user to identify and facilitate the user to apply force.

A limiting pin 733 protrudes inward from the inner wall between the front and rear ends of the active member 73 and is inserted into the first displacement hole 223 of the second shell 22 to limit the displacement direction of the active member 73 in the second shell 22. Displacement stroke. The limiting pin 733 is a cylinder, and the number of the limiting pins 733 is at least one, preferably two, and they are spaced apart from each other.

The active member 73 can be formed with a slot 734 on the inner wall between the front and rear ends. This slot 734 is for one end of the limit pin 733 to be inserted, so that the other end of the limit pin 733 protrudes inward and is inserted into the third end. In the first displacement hole 223 of the second shell 22.

The active member 73 can also be formed with an insertion hole 735 facing inward from the outer side wall between the front and rear ends. This insertion hole 735 is for the limiting pin 733 to be inserted from outside to inward. In order to limit the limiting pin 733 to the insertion hole 735 , a latch 736 is inserted into the two opposite side walls of the jack 735 to prevent the limit pin 733 from falling out of the jack 735, so that the limit pin 733 can only protrude inward and be inserted into the first displacement hole of the second shell 22 223 in. The cooperation relationship between the limiting pin 733 in the insertion hole 735 and the first passive component 74 will be described later.

The selection of the number of limit pins 733 needs to match the number of first displacement holes 223. When one limit pin 733 is used, one first displacement hole 223 is used. The active member 73 can choose to use a slot 734 or a jack 735. When two limiting pins 733 are used to match the two first displacement holes 223, the active member 73 can use slots 734 and sockets 735 at the same time, and the slots 734 and the sockets 735 are spaced apart from each other.

The active member 73 is formed with a stopper 737 with an enlarged diameter on the outer wall surface between the front and rear ends. The protruding thickness of the stopper 737 reserves sufficient working space for the limit pin 733, the slot 734 and the socket 735. The stopper 737 The cooperative relationship between 737 and the second passive component 75 and positioning component 76 will be described later.

A circular slot 738 is formed on the outer wall surface of the rear end of the active part 73. The matching relationship between the slot 738 and the second passive part 75 will be described later.

The first passive component 74 is a hollow body. The first passive component 74 is movably assembled on the inner wall surface of the second shell 22 and is penetrated by the second transmission rod 42 . The two ends of the torsion spring 71 respectively spring against the rear end of the sound mechanism 60 and the front end of the first passive component 74 . In another state, when the power torque wrench 10 does not cooperate with the sound mechanism 60, the two ends of the torsion spring 71 respectively spring against the rear end of the first shell 21 and the front end of the first passive member 74, and the movement of the first passive member 74 will adjust the torque. The spring 71 exerts a torsion force on the first shell 21 .

A slot 741 is formed radially on the outer wall surface of the first passive component 74. The slot 741 allows the active component 73 to be inserted into the limiting pin 733 in the socket 735, so that the first passive component 74 and the active component 73 can pass through the limiting pin. 733 are linked with each other. As long as the active part 73 located outside the second shell 22 is rotated, it will simultaneously drive the first passive part 74 inside the second shell 22 .

The second passive component 75 is a hollow body. The front end of the second passive component 75 is sleeved on the active component 73 , and the front end of the second passive component 75 abuts against the stopper 737 of the active component 73 . In order to make the second passive part 75 and the active part 73 interlock with each other, the latch 751 is inserted from the outer wall surface between the front and rear ends of the second passive part 75 and penetrates the slot 738 of the active part 73 . As long as the active part 73 located outside the second shell 22 is rotated, the second passive part 75 located outside the second shell 22 will be driven at the same time. An external thread 752 is formed on the outer wall surface of the front end of the second passive component 75 . The matching relationship between the external thread 752 and the positioning component 76 will be described later.

A limiting pin 753 protrudes inward from the inner wall of the rear end of the second passive member 75 and is inserted into the second displacement hole 224 of the second shell 22 to limit the displacement direction and displacement of the second passive member 75 in the second shell 22 journey. The second passive component 75 may be formed with an insertion hole 754 facing inward from the rear end outer wall, and the insertion hole 754 is for the limiting pin 753 to be inserted from outside to 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 that engage with each other to prevent the limit pin 753 from falling out of the socket 754. 753 can only protrude inward and be inserted into the second displacement hole 224 of the second shell 22 .

The rear end of the second passive component 75 is formed with a stopper 755 with an enlarged diameter. The stopper 755 of the second passive component 75 and the stopper 737 of the active component 73 are opposite to each other. The protruding thickness of the stopper 755 allows the limiting pin 753 to connect with the insertion hole. 754 reserves sufficient working space, and the matching relationship between the stopper 755 and the positioning member 76 will be described later.

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

Please refer to Figure 3. When the positioning member 76 is selected to back against the stopper 755 of the second passive member 75, the active member 73 is not locked in position by the positioning member 76. At this time, the first passive member 74 linked with the active member 73 can still The driven member 73 moves to adjust the torsion force of the torsion spring 71 on the sound mechanism 60 .

Please refer to Figure 4. When the positioning member 76 chooses to move forward against the stopper 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. 73 moves to adjust the torsion force of the torsion spring 71 on the sound mechanism 60. Therefore, even if the user accidentally touches it during the operation, it will not affect the set torque value, ensuring that the parts are used under appropriate torque.

The auxiliary spring 77 is disposed in the rear section of the second receiving portion 221 of the second housing 22 and is penetrated by the second transmission rod 42 . The two ends of the auxiliary spring 77 respectively spring against the rear end of the first passive member 74 and the front end of the stopper 225 . When the first passive part 74 moves with the active part 73, in addition to the force exerted by the user on the first passive part 74, the auxiliary spring 77 provides additional elastic force to the first passive part 74, making the user's operation more labor-saving.

In summary, 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 appropriate torque. In this way, through the structure described in the above embodiments, the present invention will not cause damage caused by parts being locked too tightly or loosening caused by not being locked.

Finally, the above disclosed embodiments are not intended to limit the present invention. Anyone skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present invention, and all of them are protected by the present invention. Inventing. Therefore, the protection scope of the present invention shall be determined by the appended patent application scope.

[Invention] 10: Power torque wrench 20: Shell 20A:Screw 21:First shell 211:First Accommodation Department 22:Second shell 221:Second Accommodation Department 222:External thread 223: The first displacement hole 224: Second displacement hole 225: block seat 30: Ratchet mechanism 31:Swing member 32: Rotating component 40: Transmission mechanism 41: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:Torque 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 part 738:Slot 74:First passive part 741:Slot 75: Second passive part 751:Latch 752: External thread 753:Limit pin 754:jack 755:Block 76: Positioning parts 761:Embossed 762: Internal thread 77:auxiliary spring

Figure 1: A schematic three-dimensional view of the power torque wrench of the present invention. Figure 2: A three-dimensional exploded view of the power torque wrench of the present invention. Figure 3: Combined cross-section and first action state diagram of the power torque wrench of the present invention. Figure 4: Combined cross-section and second action state diagram of the power torque wrench of the present invention. Figure 5: Combined cross-section and third action state diagram of the power torque wrench of the present invention.

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 component

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 part

738:Slot

75: Second passive part

751:Latch

752: External thread

753:Limit pin

754:jack

755:Block

76: Positioning parts

761:Embossed

762: Internal thread

77:auxiliary spring

Claims (14)

A power torque wrench with locking torque, including: A shell (20) includes a first shell (21) and a second shell (22). The first shell (21) is inserted into the second shell (22). The first shell (21) ) The front end is exposed outside the second shell (22); A ratchet mechanism (30), which includes a rocking member (31) and a rotating member (32). The rocking member (31) is swingably assembled at the front end of the first shell (21), and the rotating member (32) Rotatably assembled at the front end of the swing member (31); A transmission mechanism (40) is inserted into 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) comes from a The swing member (31) swings as the transmission mechanism (40) rotates eccentrically, and the rotating member (32) rotates as the swing member (31) swings; and A torsion mechanism (70), which includes a torsion spring (71) and an adjustment member (72). The torsion spring (71) is disposed in the second shell (22), and the torsion spring (71) is driven by the The mechanism (40) is penetrated, 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 torsion spring (71) The two ends respectively spring 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 torsion force of the torsion spring (71) to the first shell (21). The adjusting member (72) includes a positioning member (76), which is used to selectively lock the adjusting member (72) and thereby limit its movement. The power torque wrench with locking torque as described in claim 1, wherein the first and second shells (21, 22) are pivotally connected to each other, and the shell (20) further includes two screws (20A), the two screws (20A). The screws (20A) are opposite to each other and locked toward the front end of the second shell (22) and the first shell (21) near the unexposed front ends. The side wall of the second shell (22) and the two screws (20A) A set of rings is set between them, and the locking direction of the two screws (20A) of the housing (20) intersects with the swinging direction of the swing 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 shaft pin (43), and the The first and second transmission rods (41, 42) are inserted into the housing (20). The front end of the first transmission rod (41) is assembled on the swing member (31) so as to be eccentrically rotatable. A recess (411) extends axially from the rear end of the rod (41). The recess (411) is for the front end of the second transmission rod (42) to be inserted. The shaft pin (43) is radially inserted into two opposite recesses (411). The side wall 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) that is detachably assembled on the housing (20). When the transmission mechanism (40) rotates It is supported by the support mechanism (50). The power torque wrench with locking torque as described in claim 1, further comprising a sound mechanism (60), the front end of which is assembled at the rear end of the first shell (21), and the sound mechanism (60) is supported by the The transmission mechanism (40) is penetrated, and the sound mechanism (60) is arranged in the second shell (22). The rear end of the sound mechanism (60) is elastically resisted by the torsion spring (71), and the adjustment member (72) Movement will adjust the torsion force of the torsion spring (71) on the sound mechanism (60). The power torque wrench with locking torque as described in claim 1, wherein an external thread (222) is formed on the outer wall surface of the rear section of the second shell (22), and an external thread (222) is formed on the rear section wall surface of the second shell (22) axially. A displacement hole (223), the first displacement hole (223) is formed continuously with the external thread (222), the first displacement hole (223) partially overlaps the external thread (222), and the rear section of the second shell (22) A second displacement hole (224) is axially formed on the wall. The second displacement hole (224) is located behind the first displacement hole (223). A stopper (225) is locked at the rear end of the second shell (22). The stopper (225) is penetrated by the rear end of the transmission mechanism (40), and the part that is penetrated is driven by the power source (P) to rotate. The part that is not penetrated is covered with a bearing (421). The transmission mechanism (40) The rear end is rotatably assembled on the block (225). The power torque wrench with locking torque as described in claim 6, wherein the adjustment member (72) further includes an active part (73), the active part (73) is a hollow body, and the active part (73) can It is movably assembled on the outer wall of the second shell (22). The inner wall of the front end of the active part (73) is formed with an internal thread (731). The active part (73) is sleeved on the second shell (22). The internal and external threads (731, 222) mesh with each other, the outer wall surface of the front end of the active member (73) is formed with an embossing (732), and the inner wall surface between the front and rear ends of the active member (73) protrudes inward for a limit. A position pin (733) is inserted into the first displacement hole (223) of the second shell (22). The active member (73) is formed with a stop with an enlarged diameter on the outer wall between the front and rear ends. part (737), and a slot (738) is formed on the outer wall surface of the rear end of the active member (73). The power torque wrench with locking torque as described in claim 7, wherein a slot (734) is formed on the inner wall surface between the front and rear ends of the driving member (73), and the slot (734) is used for the limiter. One end of the positioning pin (733) is inserted, and the other end of the limiting pin (733) protrudes inward and is inserted into the first displacement hole (223) of the second shell (22). The power torque wrench with locking torque as described in claim 7, wherein a socket (735) is formed through the outer wall between the front and rear ends of the driving member (73) facing inward, and the socket (735) The limiting pin (733) is inserted from outside to inward. The limiting pin (733) protrudes inward and is inserted into the first displacement hole (223) of the second shell (22). The power torque wrench with locking torque as described in claim 7, wherein the adjustment member (72) further includes a first passive component (74), the first passive component (74) is a hollow body, and the first passive component (74) is a hollow body. The passive part (74) is movably assembled on the inner wall of the second shell (22), and the first passive part (74) is penetrated by the transmission mechanism (40), and the front end of the first passive part (74) is The torsion spring (71) elastically resists, and a slot (741) is radially formed on the outer wall surface of the first passive part (74). The slot (741) is used for the limiting pin (733) of the active part (73). The first passive part (74) and the active part (73) are interlocked with each other through the limiting pin (733). The power torque wrench with locking torque as claimed in claim 10, wherein the adjustment member (72) further includes a second passive component (75), the second passive component (75) is a hollow body, and the second passive component (75) is a hollow body. The front end of the passive part (75) is sleeved on the active part (73), and the front end of the second passive part (75) abuts the stop part (737) of the active part (73). The second passive part (75) ) A latch (751) is inserted into the outer wall surface between the front and rear ends. The latch (751) passes through the slot (738) of the active part (73). The outer wall surface of the front end of the second passive part (75) An external thread (752) is formed, and a limiting pin (753) protrudes inward from the inner wall of the rear end of the second passive component (75), which is inserted into the second displacement hole (224) of the second shell (22). ), a blocking portion (755) with an enlarged diameter is formed at the rear end of the second passive component (75), and the blocking portion (755) of the second passive component (75) and the blocking portion of the active component (73) (737) Opposite each other. The power torque wrench with locking torque as described in claim 11, wherein the outer wall of the rear end of the second driven member (75) faces inward and is formed with a socket (754), and the socket (754) is used for the limiter. The positioning pin (753) is inserted from the outside inward, and the positioning pin (753) protrudes inward and is inserted into the second displacement hole (224) of the second shell (22). The power torque wrench with locking torque as claimed in claim 11, wherein the positioning member (76) of the adjustment member (72) is a hollow body, and the positioning member (76) is movably assembled on the second passive On the component (75), an embossing (761) is formed on the outer wall surface of the positioning component (76), and an internal thread (762) is formed on the inner wall surface of the positioning component (76). The positioning component (76) is sleeved on the second On the passive part (75), the internal and external threads (762, 752) are engaged with each other, and the positioning part (76) moves on the second passive part (75) to selectively lock the active part of the adjusting member (72). Piece (73) thereby restricts its movement. The power torque wrench with locking torque as described in claim 13, wherein the adjustment member (72) further includes an auxiliary spring (77), which is disposed in the second shell (22), and the auxiliary spring (77) 77) Passed by the transmission mechanism (40), the two ends of the auxiliary spring (77) respectively spring against the rear end of the first passive part (74) and the front end of the stopper (225).