TW201618905A - Adjustable torque screwdriver - Google Patents

Abstract

An adjustable torque screwdriver is provided. The screwdriver includes a sleeve, a screwdriver head, a resistance portion and an axle. The length of the sleeve is adjustable. The screwdriver head is partially received in the sleeve. The axle and the resistance part are both received in the sleeve. The resistance part is fixed to the sleeve. The resistance part and one end of the axle cooperatively prevent the axle to rotate about the sleeve. The other end of the axle is fixed to the screwdriver head. The more contact area between the axle and the resistance part, the more resistance between the axle and the resistance part. The resistance between the axle and the resistance part can be adjusted by adjusting the contact area between the axle and the resistance part, thus to determine a maximum torque between the axle and the resistance part and further determine a maximum twist torque of the screwdriver.

Description

Adjustable torque screwdriver

The present invention relates to a screwdriver, and more particularly to a two-way adjustable torque driver.

The screwdriver is an indispensable tool in life and work, and one of the adjustable torque screwdrivers. At present, most of the adjustable torque screwdrivers on the market can only provide the maximum output torque of the lock, while the other direction is basically infinite. This kind of screwdriver has many defects in engineering verification, and the structure is mostly complicated. The production cost and maintenance cost are both high, which is not conducive to maintenance and replacement.

In view of this, it is necessary to provide a two-way adjustable torque driver so that the engineering verification can be verified in the forward and reverse directions.

An adjustable torque driver includes a sleeve capable of adjusting a length, a screwdriver head received at one end of the sleeve, a resistance portion and a rotating shaft contacting the resistance portion, wherein the resistance portion and the rotating shaft are respectively received in the sleeve, The resistance portion is fixed to the sleeve, and the resistance portion interacts with one end of the rotating shaft to provide a resistance for preventing rotation of the rotating shaft relative to the sleeve, and the other end of the rotating shaft is fixed to one end of the screwdriver head to block the rotating shaft The resistance of the rotation of the sleeve is proportional to the contact area of the rotating shaft and the resistance portion, and the contact area of the rotating shaft and the resistance portion is controlled to determine the resistance to the rotation of the rotating shaft relative to the sleeve, thereby further Determine the maximum torque to rotate the shaft and determine the maximum twisting torque of the screwdriver head.

The adjustable torque driver of the invention can complete the two-way torque adjustment by utilizing the resistance between the resistance portion and the rotating shaft, has better calibration effect during engineering verification, and has a simple structure, and is suitable for replacement of a plurality of screwdriver heads.

1 is a perspective assembled view of an adjustable torque driver of the present invention.

2 is an exploded perspective view of the adjustable torque driver of FIG. 1.

Figure 3 is an exploded perspective view of the other direction of the adjustable torque driver of Figure 1.

Figure 4 is a cross-sectional view of the scale sleeve of Figure 2 taken along line IV-IV.

Figure 5 is a cross-sectional view of the adjusting cylinder shown in Figure 2 taken along line V-V.

Figure 6 is a cross-sectional view of the adjusting cylinder shown in Figure 5 taken along line VI-VI.

Figure 7 is an exploded perspective view of the cartridge lock shown in Figure 2.

Figure 8 is a cross-sectional view taken along the line VII-VII when the length of the sleeve of the adjustable torque driver shown in Figure 1 is the shortest.

Fig. 9 is a schematic view showing the state in which the sleeve of the adjustable torsion screwdriver shown in Fig. 8 has the longest length after adjustment.

Referring to Figures 1-3, the present invention provides an adjustable torque driver 100 of an embodiment. The adjustable torque driver 100 includes an adjustable length sleeve 10, a resistance portion 20 mounted on the sleeve 10, a rotating shaft 30 received in the sleeve 10, a screwdriver head 40 connected to the rotating shaft 30 at one end, and a sleeve 10 connected to the sleeve 10. And an elastic member 50 between the rotating shafts 30. The screwdriver head 40 is used to screw the screws. The resistance portion 20 and the rotating shaft 30 have mutually repulsive magnetic forces, and the contact area between the resistance portion 20 and the rotating shaft 30 determines the magnitude of the magnetic force between the two. The larger the contact area, the larger the magnetic force, and the greater the maximum torque that can be output. Large, on the contrary, the smaller the magnetic force, the smaller the maximum torque that can be output. When it is necessary to adjust the output maximum torque, the length of the sleeve 10 is adjusted, so that the contact area between the resistance portion 20 and the rotating shaft 30 is changed to change the maximum torque between the rotating shaft 30 and the resistance portion 20, thereby adjusting the maximum torque of the screwdriver head 40. The purpose.

The sleeve 10 includes a scale sleeve 11, an adjustment cylinder 12 spirally coupled to the scale sleeve 11, and a fixed cover 13 connected to one end of the adjustment cylinder 12.

Referring to FIG. 4 together, the scale sleeve 11 is internally provided with a first through hole 110. The scale sleeve 11 includes a first cylinder 111, a polygonal cylinder 112 connected to one end of the first cylinder 111, and is connected to the polygonal cylinder 112. A second cylinder 113 at one end of the first cylinder 111. The diameter of the first cylinder 111 is larger than the diameter of the polygonal cylinder 112 and the second cylinder 113. A receiving groove 1111 is defined in the inner side wall of the first cylinder 111. In the present embodiment, the number of the receiving grooves 1111 is six, and the six receiving grooves 1111 are sequentially arranged at an angle of 60 degrees on the inner side wall of the first cylinder 111. A scale line 1121 is engraved on the outer side wall of the polygonal cylinder 112. A first thread 1131 is provided on the outer side wall of the second cylinder 113. In the present embodiment, the scale sleeve 11 further includes a cover 114 that is received from the end of the first cylinder 111 away from the polygonal cylinder 112. The rear cover 114 is adjacent to the first cylinder 111 and has a first receiving groove 1141. The rear cover 114 is The first cylinder 111 is connected by a screw.

It can be understood that the back cover 114 and the first cylinder 111 can also be connected by other means, for example, by snapping, and the back cover 114 and the first cylinder 111 can be integrally formed.

It can be understood that the diameter of the first cylinder 111 can be less than or equal to the diameter of the polygonal cylinder 112 and the second cylinder 113.

The adjusting cylinder 12 includes a body 121, a connecting portion 122 connected to one end of the body 121, and a cartridge lock 123 connected to the body 121.

Referring to FIG. 5 , the first through slot 1211 adjacent to the connecting portion 122 and the second through slot 1212 away from the connecting portion 122 are defined in the main body 121 . The diameter of the second through slot 1212 is larger than the diameter of the first through slot 1211 . . The body 121 is provided with a second thread 1213 matching the first thread 1131 on the sidewall of the first through slot 1211. A second receiving slot 1214 is defined in the outer side wall of the main body 121 away from the connecting portion 122. A third receiving slot 1215 is defined in the inner side wall of the second receiving slot 1214. The second through hole 1216 penetrates the receiving groove 1214 and the third receiving groove 1215. The connecting portion 122 is a cylinder. The connecting portion 122 is separated from the surface of the body 121 by a third through hole 1221 extending through the connecting portion 122. The outer side wall of the connecting portion 122 is provided with a third thread 1222. In the embodiment, the outer side wall of the body 121 is also covered with a rubber sleeve 1217 to increase the frictional force of the adjusting cylinder 12 when used, and has an anti-slip effect.

It will be appreciated that there are other ways of increasing the frictional force of the adjustment cylinder 12 when it is used, for example, by providing a texture on the outer sidewall of the body 121 to increase the frictional force of the adjustment cylinder 12 when in use.

Referring to FIG. 7 together, the cartridge lock 123 includes an adjusting member 1231, a locking member 1232 connected to the adjusting member 1231, and a fixing pin 1233 connecting the adjusting member 1231 and the locking member 1232. A fourth through hole 1234 penetrating the adjusting member 1231 is opened on one side of the adjusting member 1231, and a fifth through hole 1235 penetrating the adjusting member 1231 is opened on the other side. The fourth through hole 1234 and the fifth through hole 1235 cross each other. The locking member 1232 includes a main body 1236 and a protruding post 1237 connected to the main body 1236. The diameter of the protruding post 1237 is equal to the diameter of the second through hole 1216. The protruding post 1237 is disposed away from the cylindrical surface of the main body 1236 at the end of the main body 1236. Six through holes 1238.

It can be understood that the adjusting member 1231 and the locking member 1232 can also be connected by means other than the fixing pin 1233, for example, by adjusting the adjusting member 1231 and the locking member 1232.

Referring to FIGS. 2 and 3 , the fixing cover 13 includes a ring 131 and a tapered portion 132 connected to one end of the ring 131 . The inner side wall of the ring 131 is provided with a fourth thread 1311 that cooperates with the third thread 1222. The tapered portion 132 is open from the end of the ring 131 with a seventh through hole 1321 penetrating the tapered portion 132. In the present embodiment, the outer side wall of the ring 131 is provided with a texture to increase the frictional force of the fixed cover 13.

The resistance portion 20 is housed in the accommodation groove 1111. In the present embodiment, the resistance portion 20 is aligned with the number of the accommodation grooves 1111, the resistance portion 20 is a magnet, and the number of the resistance portions 20 is six.

It can be understood that the number of the resistance portions 20 is not limited to six, and may be four, eight, ten, and the like.

The rotating shaft 30 includes a first rod 31, a second rod 32 connected to one end of the first rod 31, a projection 33 connected to one end of the second rod 32, and a magnet 34 received in the first rod 31. The first rod 31 has a cylindrical shape. The top surface of the first rod 31 defines a fourth receiving groove 311. The outer surface of the first rod 31 is provided with a fifth receiving groove 312 corresponding to the magnet 34. The magnet 34 is received in the first portion. Five accommodating slots 312. In the present embodiment, the number of the magnets 34 and the fifth accommodating grooves 312 is two, and the two magnets 34 are respectively accommodated in the corresponding second accommodating grooves 312. In other embodiments, the number of the magnets 34 and the fifth accommodating grooves 312 may not be limited to two. A latching slot 331 is defined in one end of the protruding block 33 away from the second rod 32. The latching slot 331 is configured to receive one end of the screwdriver head 40. In the present embodiment, the resistance portion 20 is disposed around the magnet 34, and the magnet 34 and the resistance portion 20 repel each other. When the length of the sleeve 10 is the shortest, the contact area between the resistance portion 20 and the magnet 34 is the largest, and the first thread 1131 It completely overlaps with the second thread 1213; when the length of the sleeve 10 is the longest, the contact area of the resistance portion 20 with the magnet 34 is the smallest, and the first thread 1131 and the second thread 1213 do not overlap.

It can be understood that the number of magnets is not limited to two, and may be four, eight, ten, and the like.

The driver head 40 includes a main body 41, a cylinder 42 connected to one end of the main body 41, a latch 43 connected to one end of the cylinder 42 away from the main body 41, and a latching block 44 connected to the end of the clip 43 away from the cylinder 42. The diameter of the cylinder 42 coincides with the diameter of the seventh through hole 1321, and the diameter of the cylinder 42 is larger than the diameter of the body 41. The length of the tab 43 is larger than the diameter of the third through hole 1221, so that the tab 43 cannot pass through the third through hole 1221. The free end of the latching block 44 is received in the latching slot 331 through the third through hole 1221 so that the splitter head 40 cannot be rotated relative to the rotating shaft 30. The body 41 is remote from one end of the cylinder 42 for screwing.

It can be understood that the shape of the latching block 44 and the latching slot 331 is not limited to the square shape in the embodiment, and may be other polygonal shapes such as a triangle, a hexagon, or the like.

One end of the elastic member 50 is received in the first receiving groove 1141, and the other end is received in the fourth receiving groove 311. In the present embodiment, the elastic member 50 is a spring.

Referring to FIG. 6 together, in the assembly, the six resistance portions 20 are firstly inserted into the six receiving slots 1111, the magnets 34 are embedded in the fifth receiving slots 312, the adjusting members 1231 are received in the second receiving slots 1214, and the protruding posts are The free end of the 1237 passes through the second through hole 1216 and the fourth through hole 1234 in sequence, and the main body 1236 is received in the third receiving groove 1215, and then the fixing pin 1233 is sequentially passed through the fifth through hole 1235 and the sixth through hole 1238. Further, the adjusting member 1231 is fixed to the locking member 1232. Secondly, the locking block 44 is passed through the third through hole 1221 so that the locking protrusion 43 abuts against the connecting portion 122 away from the end of the body 121, and the main body 41 of the screwdriver head 40 is freely worn. The seventh through hole 1321 makes the cylinder 42 contact with the fixing cover 13 , and the third thread 1222 and the fourth thread 1311 are rotationally engaged to fix the fixing cover 13 and the adjusting cylinder 12 , and the locking protrusion 43 is adjacent to the third through hole 1221 . Then, the free end of the latching block 44 is received in the latching slot 331, and the free end of the first rod 31 is passed through the first through hole 110 of the scale sleeve 11, so that the magnet 34 is in contact with the resisting portion 20, and The first thread 1131 is in a rotational fit with the second thread 1213 such that the scale sleeve 11 cooperates with the adjustment cylinder 12; The elastic member 50 has one end connected to the fifth receiving groove 312, and the other end connected to the first accommodating groove 1141, and the rear cover 114 is connected to the first cylinder 111, i.e., to complete the assembly.

Referring to FIG. 8-9, in use, the cartridge lock 123 is first rotated, so that the locking member 1232 is completely received in the third receiving groove 1215. At this time, the locking member 1232 and the scale sleeve 11 do not interfere with each other, and the adjusting cylinder 12 is adjusted. The locking cylinder 12 is rotated relative to the scale sleeve 11, so that the adjusting cylinder 12 corresponds to the required scale on the scale line 1121, and the cylinder lock 123 is rotated again, so that the locking member 1232 protrudes from the third receiving groove 1215, and the scale The sleeve 11 generates interference, that is, the adjustment cylinder 12 and the scale sleeve 11 are locked, the adjustment of the torque of the screwdriver is completed, and the screwdriver can be screwed using the screwdriver head 40. When the resistance of the screwdriver head 40 is less than the resistance provided between the resistance portion 20 and the magnet 34, the screwdriver head 40 and the rotating shaft 30 do not rotate relative to the sleeve 10, and the screw can be turned; when the screwdriver head 40 rotates, the resistance is changed. When the resistance provided between the resistance portion 20 and the magnet 34 is greater than the resistance provided between the resistance portion 20 and the magnet 34, the screwdriver head 40 rotates the rotation shaft 30, so that the screwdriver head 40 and the rotation shaft 30 rotate relative to the sleeve 10, so that the screwdriver cannot be screwed.

When not in use, the cartridge lock 123 is opened, and under the action of the elastic member 50, it is easier to rotate the adjustment cylinder 12 so that the first thread 1131 and the second thread 1213 completely overlap, and then the cylinder lock 123 can be locked.

It can be understood that the resistance portion 20 can also be received on the inner side wall of the polygonal cylinder 112. When the length of the sleeve 10 is the longest, the contact area between the resistance portion 20 and the magnet 34 is the largest, and the first thread 1131 and the second thread 1213 do not overlap; When the length of the sleeve 10 is the shortest, the contact area of the resistance portion 20 with the magnet 34 is the smallest, and the first thread 1131 and the second thread 1213 completely overlap.

The adjustable torque driver of the invention can complete the two-way torque adjustment by utilizing the resistance between the resistance portion and the rotating shaft, has better calibration effect during engineering verification, and has a simple structure, and is suitable for replacement of a plurality of screwdriver heads.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ adjustable torque screwdriver

10‧‧‧ sleeve

11‧‧‧Scale sleeve

12‧‧‧Adjustment tube

13‧‧‧Fixed cover

110‧‧‧ first through hole

111‧‧‧First cylinder

112‧‧‧Poly cylinder

113‧‧‧second cylinder

1111‧‧‧ receiving trough

1121‧‧‧ tick

1131‧‧‧first thread

114‧‧‧Back cover

1141‧‧‧First accommodating slot

121‧‧‧Ontology

122‧‧‧Connecting Department

1211‧‧‧First through slot

1212‧‧‧Second through slot

1213‧‧‧second thread

1214‧‧‧Second accommodating slot

1215‧‧‧The third accommodating slot

1216‧‧‧second through hole

1221‧‧‧ third through hole

1222‧‧‧ Third thread

1217‧‧‧Rubber cover

123‧‧‧cylinder lock

1231‧‧‧Adjustment

1232‧‧‧Locking parts

1233‧‧‧fixed pin

1234‧‧‧4th through hole

1235‧‧‧5th through hole

1236, 41‧‧‧ subjects

1237‧‧‧Bump

1238‧‧‧ sixth through hole

131‧‧‧ Ring

132‧‧‧Cone

1311‧‧‧fourth thread

1321‧‧‧7th through hole

20‧‧‧Resistance

30‧‧‧ shaft

31‧‧‧first shot

32‧‧‧second shot

33‧‧‧Bumps

34‧‧‧ magnet

311‧‧‧4th accommodating slot

312‧‧‧ fifth accommodating slot

331‧‧‧ card slot

40‧‧‧ screwdriver head

42‧‧‧Cylinder

43‧‧‧ 卡

44‧‧‧ card block

50‧‧‧Flexible parts

no

11‧‧‧Scale sleeve

12‧‧‧Adjustment tube

13‧‧‧Fixed cover

111‧‧‧First cylinder

112‧‧‧Poly cylinder

113‧‧‧second cylinder

1121‧‧‧ tick

114‧‧‧Back cover

121‧‧‧Ontology

122‧‧‧Connecting Department

1214‧‧‧Second accommodating slot

1216‧‧‧second through hole

1217‧‧‧Rubber cover

123‧‧‧cylinder lock

131‧‧‧ Ring

132‧‧‧Cone

1311‧‧‧fourth thread

20‧‧‧Resistance

30‧‧‧ shaft

31‧‧‧first shot

32‧‧‧second shot

33‧‧‧Bumps

34‧‧‧ magnet

311‧‧‧4th accommodating slot

40‧‧‧ screwdriver head

41‧‧‧ Subject

42‧‧‧Cylinder

43‧‧‧ 卡

44‧‧‧ card block

50‧‧‧Flexible parts

Claims (10)

An adjustable torque driver includes a sleeve capable of adjusting a length and a screwdriver head received at one end thereof, wherein the adjustable torque driver further comprises a resistance portion and a rotation shaft contacting the resistance portion, the resistance portion And the rotating shaft is received in the sleeve, the resistance portion is fixed to the sleeve, and the resistance portion interacts with one end of the rotating shaft to provide a resistance for preventing rotation of the rotating shaft relative to the sleeve, and the other end of the rotating shaft is One end of the screwdriver head is fixed, and the resistance of the rotation of the rotation shaft relative to the sleeve is proportional to the contact area of the rotation shaft and the resistance portion, and the contact area of the rotation shaft and the resistance portion is controlled to prevent The resistance of the rotating shaft relative to the rotation of the sleeve, thereby determining the maximum torque for rotating the rotating shaft, and determining the maximum twisting torque of the screwdriver head. The adjustable torsion screwdriver of claim 1, wherein the sleeve comprises a scale sleeve, an adjustment cylinder spirally connected to the scale sleeve, and a fixing cover connected to one end of the adjustment cylinder, the scale sleeve a first through hole is formed in the inner side of the first through hole, the resisting portion is received in the receiving groove, and the adjusting tube comprises a body and a connecting portion connected to one end of the body One end of the scale sleeve is received in the body, and the scale sleeve portion is movably received in the adjustment cylinder. The fixed cover is connected at one end to the connecting portion, and the connecting portion is opened away from the surface of the body. a third through hole of the connecting portion, the fixing cover is away from the end of the adjusting cylinder, and a seventh through hole penetrating the fixing cover is opened. The one end of the screwdriver head is received in the sleeve by the third through hole and the seventh through hole . The adjustable torque driver of claim 2, wherein the scale sleeve comprises a first cylinder, a polygonal cylinder connected to one end of the first cylinder, and connected to the polygonal cylinder away from the first cylinder a second cylinder at one end, the receiving groove is defined on an inner side wall of the first cylinder, and a first thread is disposed on an outer side wall of the second cylinder, and the adjusting cylinder is internally provided with a first portion adjacent to the connecting portion a second thread corresponding to the first thread is disposed on the inner side wall of the first through groove, and the length of the scale sleeve received in the adjusting cylinder is adjusted by the rotation of the first thread and the second thread . The adjustable torque driver according to claim 3, wherein the adjustable torque driver further comprises an elastic member, the elastic member is connected at one end to the first cylinder away from the end of the adjusting cylinder, and the other end is connected to the rotating shaft Keep away from one end of the adjustment cylinder. The adjustable torsion screwdriver of claim 4, wherein the scale sleeve further comprises a cover that is received by the first cylinder away from the end of the polygonal cylinder, the rear cover and the first cylinder being threaded The elastic member is connected at one end to the rear cover, and the other end is connected to the rotating shaft away from the end of the adjusting cylinder. The adjustable torsion driver of claim 2, wherein the outer side wall of the connecting portion is provided with a third thread, and the fixing cover is adjacent to the inner side wall of the connecting portion and is matched with the third thread. The four threads are connected to the adjusting cylinder by the third thread and the fourth thread. The adjustable torque driver of claim 2, wherein the rotating shaft comprises a first rod, a second rod connected to one end of the first rod, a bump connected to one end of the second rod, and received in the shaft a magnet of the first rod, wherein the outer side of the first rod is provided with a fifth accommodating groove, the magnet is received in the fifth accommodating groove, the number of the accommodating grooves is plural, and the resistance portion includes a plurality of magnets The plurality of magnets are correspondingly received in the plurality of receiving slots, and surround the magnets received in the fifth receiving groove and repel the magnets received in the fifth receiving groove to provide a rotation preventing the rotating shaft from rotating relative to the sleeve. resistance. The adjustable torque driver of claim 7, wherein the protrusion is provided with a latching slot at one end of the second rod, the screwdriver head comprising a main body, a cylinder connected to one end of the main body, and connected to the cylinder a card protrusion that is away from one end of the main body and a latching block that is connected to the end of the card protrusion away from the end of the cylinder, the length of the protrusion is larger than the aperture of the third through hole, and the card protrusion abuts the connecting portion away from the scale sleeve One end of the cylinder, the free end of the latching block is received in the latching slot through the third through hole. The adjustable torsion driver of claim 2, wherein the adjustment cylinder further comprises a cylinder lock, and the second accommodating groove is defined in the outer side wall of the body away from the connecting portion, the body corresponding to the second accommodating A third receiving slot is defined in the inner side wall of the slot, and the second through hole is formed in the body, and the second locking hole is connected to the third receiving slot. a locking member connected to the adjusting member and a fixing pin connecting the adjusting member and the locking member, the adjusting member being received in the second receiving groove, the locking member being partially received in the third receiving groove and partially passing through the second through hole The fixing pin fixes the locking member and the fixing member together. When the locking member is completely received in the third receiving groove, the locking member does not interfere with the scale sleeve, and the adjusting cylinder rotates relative to the scale sleeve. When the locking member protrudes from the third receiving groove and interferes with the scale sleeve, the adjusting cylinder rotates relative to the scale sleeve. The adjustable torsion driver of claim 9, wherein the adjusting member has a fourth through hole extending through the adjusting member, the locking member comprising a main body and a cylinder connected to the main body at one end, the cylindrical portion The free end sequentially passes through the second through hole and the fourth through hole, and the main body is received in the second receiving groove, the fixing pin passes through the adjusting member and the free end of the cylinder to fix the adjusting member and the locking portion The pieces are fixed to each other.