TWI624333B - Adjustable torque screwdriver - Google Patents

Abstract

The invention provides an adjustable torque screwdriver, which includes a sleeve capable of adjusting length, a screwdriver head accommodated in the sleeve at one end, a resistance portion, and a shaft contacting the resistance portion. The resistance portion and the rotation shaft are received in the sleeve, and the resistance portion is fixed. Connected to the sleeve, the resistance part interacts with one end of the rotating shaft to provide a resistance to prevent the rotating shaft from rotating with respect to the sleeve. The size of the contact area of the resistance part is directly proportional. By controlling the contact area of the shaft and the resistance part to determine the resistance to prevent the shaft from rotating with respect to the sleeve, the maximum torque of the rotating shaft is determined, and the maximum torque of the screwdriver head is determined.

Description

Adjustable torque screwdriver

The invention relates to a screwdriver, in particular to a two-way adjustable torque driver.

Screwdriver is an indispensable tool in life and work. Adjustable torque screwdriver is one of them. 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 type of screwdriver has many defects during engineering verification and the structure is mostly complicated , Production costs and maintenance costs are high, which is not conducive to maintenance and replacement.

In view of this, it is necessary to provide a two-way adjustable torque screwdriver to enable forward and reverse direction verification during project verification.

An adjustable torque screwdriver includes a sleeve capable of adjusting length, a screwdriver head accommodated in the sleeve at one end, a resistance portion, and a rotating shaft in contact with the resistance portion. The resistance portion and the rotating shaft are both received in the sleeve. A resistance portion is fixed to the sleeve, and the resistance portion interacts with one end of the rotating shaft to provide a resistance to prevent the rotating shaft from rotating relative to the sleeve. The other end of the rotating shaft is fixedly connected to one end of the screwdriver head to prevent the rotating shaft. The resistance to the rotation of the sleeve is proportional to the contact area of the shaft and the resistance portion. By controlling the contact area of the shaft and the resistance portion to determine the resistance to prevent the shaft from rotating with respect to the sleeve, Determine the maximum torque of turning the shaft, and determine the maximum torque of the screwdriver head.

The adjustable torque driver of the present invention can complete the two-way torque adjustment by using the resistance between the resistance part and the rotating shaft. It has a good calibration effect during engineering calibration, and has a simple structure, which is suitable for replacing a variety of screwdriver heads.

100‧‧‧ Adjustable Torque Screwdriver

10‧‧‧ sleeve

11‧‧‧ graduated sleeve

12‧‧‧ adjusting tube

13‧‧‧Fixed cover

110‧‧‧first through hole

111‧‧‧first cylinder

112‧‧‧ Polygon tube

113‧‧‧Second cylinder

1111‧‧‧Container

1121‧‧‧ Tick

1131‧‧‧first thread

114‧‧‧back cover

1141‧‧‧First receiving slot

121‧‧‧ Ontology

122‧‧‧ Connection Department

1211‧‧‧First through slot

1212‧‧‧Second through slot

1213‧‧‧Second thread

1214‧‧‧Second accommodation slot

1215‧‧‧Third accommodation slot

1216‧‧‧Second through hole

1221‧‧‧Third through hole

1222‧‧‧ Third thread

1217‧‧‧rubber sleeve

123‧‧‧Cylinder lock

1231‧‧‧Adjustment

1232‧‧‧Lock

1233‧‧‧Fixed pin

1234‧‧‧Fourth through hole

1235‧‧‧Fifth through hole

1236, 41‧‧‧ Subject

1237‧‧‧ convex post

1238‧‧‧Sixth through hole

131‧‧‧circle

132‧‧‧Tapered

1311‧‧‧ Fourth thread

1321‧‧‧Seventh through hole

20‧‧‧ resistance

30‧‧‧ shaft

31‧‧‧ first shot

32‧‧‧ second shot

33‧‧‧ bump

34‧‧‧Magnet

311‧‧‧Fourth receiving slot

312‧‧‧Fifth receiving slot

331‧‧‧bit slot

40‧‧‧driver bit

42‧‧‧Cylinder

43‧‧‧Katu

44‧‧‧Card Block

50‧‧‧elastic

FIG. 1 is a perspective assembly view of an adjustable torque driver according to the present invention.

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

3 is an exploded perspective view of the adjustable torque driver shown in FIG. 1 in another direction.

FIG. 4 is a cross-sectional view of the scale sleeve shown in FIG. 2 along the line IV-IV.

FIG. 5 is a cross-sectional view of the regulating cylinder shown in FIG. 2 along the line V-V.

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

FIG. 7 is an exploded perspective view of the cylinder lock shown in FIG. 2.

FIG. 8 is a sectional view along the line VII-VII when the sleeve of the adjustable torque driver shown in FIG. 1 has the shortest length after adjustment.

FIG. 9 is a schematic diagram of the state of the adjustable torque screwdriver shown in FIG. 8 when the sleeve has the longest length.

Please refer to FIGS. 1-3. The present invention provides an adjustable torque driver 100 according to 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 accommodated in the sleeve 10, a screwdriver head 40 connected to the rotating shaft 30 at one end, and connected to the sleeve 10. And the elastic member 50 between the shaft 30. The screwdriver head 40 is used for screwing. The resistance portion 20 and the rotating shaft 30 have mutually exclusive 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 you need to adjust the maximum output torque, adjust the length of the sleeve 10 so that the resistance The contact area between the force 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 achieving the purpose of adjusting the maximum torque of the driver head 40.

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

Please refer to FIG. 4 together. A first through hole 110 is provided inside the scale sleeve 11. The scale sleeve 11 includes a first cylinder 111, a polygonal cylinder 112 connected to one end of the first cylinder 111, and a polygonal cylinder 112. A second cylinder 113 at one end of the first cylinder 111. Among them, the diameter of the first cylinder 111 is larger than the diameters of the polygonal cylinder 112 and the second cylinder 113. A receiving groove 1111 is defined in an inner wall of the first cylinder 111. In this embodiment, the number of the receiving grooves 1111 is six, and the six receiving grooves 1111 are arranged on the inner side wall of the first cylinder 111 at an included angle of 60 degrees in order. Scale lines 1121 are 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 this embodiment, the graduated sleeve 11 further includes a rear cover 114 received at one end of the first cylinder 111 away from the polygonal cylinder 112. A rear end of the rear cover 114 is provided with a first receiving groove 1141 adjacent to the first cylinder 111. 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 methods, for example, by a snap connection, and the back cover 114 and the first cylinder 111 can be an integrally formed structure.

It can be understood that the diameter of the first cylinder 111 may be smaller than or equal to the diameters of the polygon cylinder 112 and the second cylinder 113.

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

Please refer to FIG. 5 together, a first through groove 1211 adjacent to the connecting portion 122 and a second through groove 1212 remote from the connecting portion 122 are provided inside the body 121. The diameter of the second through groove 1212 is larger than the diameter of the first through groove 1211. . The main body 121 is provided on the side wall of the first through groove 1211 with a second thread 1213 which is matched with the first thread 1131. A second receiving groove 1214 is provided on the outer side wall of the main body 121 away from the connecting portion 122. A third receiving groove 1215 is provided on the inner side wall of the main body 121 corresponding to the second receiving groove 1214. A second through hole 1216 is formed between the receiving groove 1214 and the third receiving groove 1215. The connecting portion 122 is a cylinder. The surface of the connecting portion 122 away from the body 121 is provided with a third through hole 1221 penetrating through the connecting portion 122. The outer wall of the connecting portion 122 is provided with a third thread 1222. Authentic In this embodiment, a rubber sleeve 1217 is sleeved on the outer side wall of the main body 121 to increase the friction force of the adjusting cylinder 12 during use, and has a non-slip effect.

It can be understood that there are other ways to increase the friction force of the adjusting cylinder 12 when using, for example, the texture of the outer wall of the body 121 is used to increase the friction force of the adjusting cylinder 12 when using.

Referring to FIG. 7 together, the cylinder 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 at one end to the main body 1236. The diameter of the protruding post 1237 is equal to the diameter of the second through hole 1216.六 通 孔 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, the adjusting member 1231 and the locking member 1232 can be connected by a snapping method.

Referring to FIGS. 2 and 3, the fixing cover 13 includes a circular ring 131 and a tapered portion 132 connected to one end of the circular ring 131. The inner wall of the ring 131 is provided with a fourth thread 1311 matching the third thread 1222, and a seventh through hole 1321 is formed at one end of the tapered portion 132 away from the ring 131 and penetrates the tapered portion 132. In this embodiment, a texture is provided on the outer side wall of the ring 131 to increase the friction force of the fixed cover 13.

The resistance portion 20 is accommodated in the receiving groove 1111. In this embodiment, the number of the resistance portion 20 is the same as the number of the receiving groove 1111. The resistance portion 20 is a magnet, and the number of the resistance portion 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 so on.

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 is cylindrical. A top surface of the first rod 31 is provided with a fourth receiving groove 311. A fifth receiving groove 312 corresponding to the magnet 34 is provided on the outer side of the first rod 31. The magnet 34 is accommodated in the first rod 31. The five containing slots 312. In this embodiment, the number of the magnets 34 and the fifth accommodating grooves 312 are two, and the two magnets 34 are respectively accommodated in the corresponding second and fifth accommodating grooves 312. In other embodiments, the number of the magnets 34 and the fifth receiving grooves 312 may not be limited to two. A latching slot 331 is provided at one end of the protruding block 33 away from the second rod 32. The latching slot 331 is used to receive the screwdriver head 40. One end. In the present embodiment, the resistance portion 20 is provided around the magnet 34, and the magnet 34 and the resistance portion 20 are mutually exclusive. When the length of the sleeve 10 is the shortest, the contact area of the resistance portion 20 and the magnet 34 is the largest, and the first thread 1131 It completely overlaps the second thread 1213; when the length of the sleeve 10 is the longest, the contact area between the resistance portion 20 and the magnet 34 is the smallest, and the first thread 1131 and the second thread 1213 do not overlap.

Understandably, the number of magnets is not limited to two, but may be four, eight, ten, and so on.

The screwdriver head 40 includes a main body 41, a cylinder 42 connected to one end of the main body 41, a locking protrusion 43 connected to one end of the cylindrical 42 away from the main body 41, and a locking block 44 connected to one end of the locking protrusion 43 away from the cylindrical 42. The diameter of the cylinder 42 is consistent with the diameter of the seventh through hole 1321, and the diameter of the cylinder 42 is larger than the diameter of the main body 41. The length of the locking protrusion 43 is larger than the diameter of the third through hole 1221, so that the locking protrusion 43 cannot pass through the third through hole 1221. The free end of the latching block 44 passes through the third through hole 1221 and is received in the latching slot 331 so that the screwdriver head 40 cannot rotate relative to the rotating shaft 30. One end of the main body 41 away from the cylinder 42 is used for screwing.

It can be understood that the shapes of the latching blocks 44 and the latching slots 331 are not limited to the square shape in this embodiment, but may be other polygonal shapes, such as triangles, hexagons, and 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 this embodiment, the elastic member 50 is a spring.

Please refer to FIG. 6 together. When assembling, firstly, the six resistance portions 20 are sequentially inserted into the six receiving grooves 1111, the magnet 34 is inserted into the fifth receiving groove 312, the adjusting member 1231 is received in the second receiving groove 1214, and the convex post The free end of 1237 passes through the second through hole 1216 and the fourth through hole 1234 in order, so that the main body 1236 is received in the third receiving groove 1215, and then the fixing pin 1233 passes through the fifth through hole 1235 and the sixth through hole 1238 in this order. Further, the adjusting member 1231 and the locking member 1232 are fixed; secondly, the locking block 44 is passed through the third through hole 1221 so that the locking protrusion 43 abuts the end of the connecting portion 122 away from the body 121, and the body 41 of the driver head 40 is freely passed through Pass the seventh through hole 1321 to make the cylinder 42 contact the fixed cover 13 and rotate the third thread 1222 and the fourth thread 1311 to fix the fixed cover 13 and the adjusting cylinder 12. At this time, the catch 43 is adjacent to the third through hole 1221. ; Then, the free end of the locking block 44 is received in the locking 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 contacts the resistance portion 20, and The first thread 1131 and the second thread 1213 are rotationally matched so that the scale sleeve 11 is matched with the adjustment cylinder 12; The bomb One end of the flexible member 50 is connected to the fourth receiving groove 311, and the other end is connected to the first receiving groove 1141. The rear cover 114 is connected to the first cylinder 111, and the assembly is completed.

Please refer to FIGS. 8-9 together. In use, first rotate the cylinder lock 123 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 cylinder 12 is adjusted. It can rotate relative to the scale sleeve 11 and rotate the adjustment cylinder 12 so that the adjustment cylinder 12 corresponds to the required scale on the scale line 1121. Turn the cylinder lock 123 again so that the locking member 1232 protrudes from the third accommodation groove 1215 and is aligned with the scale. The sleeve 11 interferes, that is, the adjustment cylinder 12 and the scale sleeve 11 are locked to complete the adjustment of the torque of the driver, and the screw 40 can be used to screw the screw. 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 will not rotate relative to the sleeve 10, and the screw can be screwed; When the resistance provided by the resistance portion 20 and the magnet 34 is greater, the screwdriver head 40 drives the rotating shaft 30 to rotate, so that the screwdriver head 40 and the rotating shaft 30 rotate relative to the sleeve 10, making the screwdriver unable to screw.

When not in use, open the cylinder lock 123. 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 lock the cylinder lock 123.

It can be understood that the resistance portion 20 can also be accommodated 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 between the resistance portion 20 and the magnet 34 is the smallest, and the first thread 1131 and the second thread 1213 completely overlap.

The adjustable torque driver of the present invention can complete the two-way torque adjustment by using the resistance between the resistance part and the rotating shaft. It has a good calibration effect during engineering calibration, and has a simple structure, which is suitable for replacing a variety of screwdriver heads.

In summary, the present invention has indeed met the requirements for an invention patent, and a patent application was filed in accordance with the law. However, the above are only preferred embodiments of the present invention, and the scope of patent application in this case cannot be limited by this. For example, those who are familiar with the skills of this case and equivalent modifications or changes made in accordance with the spirit of the present invention should be covered by the following patent applications.

Claims (9)

An adjustable torque driver includes a sleeve capable of adjusting the length and a screwdriver head whose one end is contained in the sleeve. The improvement is that the adjustable torque driver further includes a resistance portion and a rotating shaft contacting the resistance portion, and the resistance portion Both the shaft and the shaft are housed in the sleeve. The resistance portion is fixed to the sleeve. The resistance portion interacts with one end of the shaft to provide a resistance to prevent the shaft from rotating with respect to the sleeve. One end of the screwdriver head is fixedly connected, and the resistance of the rotation shaft to the sleeve from rotating is proportional to the contact area of the rotation shaft and the resistance portion. The contact area of the rotation shaft and the resistance portion is controlled to determine the resistance. The resistance of the rotating shaft to the rotation of the sleeve, thereby determining the maximum torque of rotating the rotating shaft, and determining the maximum twisting torque of the screwdriver head, wherein the sleeve includes a graduated sleeve and an adjusting cylinder spirally connected to the graduated sleeve. The adjusting cylinder includes a main body, a connecting part connected to one end of the main body, and a cylinder lock. One end of the graduated sleeve is accommodated in the body, and the graduated sleeve part is movably accommodated in an adjustable manner. In the adjusting cylinder, a second accommodating groove is provided on an outer side wall of the body away from the connecting portion, and a third accommodating groove is provided on an inner side wall of the body corresponding to the second accommodating groove. A second through hole through which the second accommodating slot and the third accommodating slot pass, the cylinder lock includes an adjusting member, a locking member connected to the adjusting member, and a fixing pin connecting the adjusting member and the locking member, The adjusting member is received in the second receiving slot, the locking member is partially received in the third receiving slot, and partially passes through the second through hole. The fixing pin fixes the locking member and the adjusting member together. When the locking member is completely accommodated in the third receiving groove, the locking member and the graduated sleeve do not interfere with each other. The adjusting cylinder rotates relative to the graduated sleeve, and when the locking member protrudes from the third receiving groove, and is in contact with the graduated sleeve, The cylinder generates interference, and the adjusting cylinder is locked with the scale sleeve. The adjustable torque screwdriver according to item 1 of the scope of patent application, wherein the sleeve further comprises a fixed cover connected to one end of the adjusting cylinder, a first through hole is opened inside the graduated sleeve, and the graduated sleeve The cylinder is provided with a receiving groove on an inner side wall of the first through hole, the resistance portion is received in the receiving groove, one end of the fixed cover is connected to the connecting portion, and a surface of the connecting portion away from the body is provided with a through hole that passes through the connecting portion A third through hole, a seventh through hole penetrating through the fixed cover is opened at one end of the fixed cover away from the adjusting cylinder, and one end of the screwdriver head is received in the sleeve through the third through hole and the seventh through hole. The adjustable torque driver according to item 2 of the scope of patent application, wherein the graduated sleeve includes a first cylinder, a polygonal cylinder connected to one end of the first cylinder, and a polygonal cylinder connected to the polygonal cylinder away from the first cylinder. A second cylinder at one end, the receiving groove is opened on the inner side wall of the first cylinder, a first thread is provided on the outer side wall of the second cylinder, and a first part adjacent to the connecting part is opened inside the adjusting cylinder. A penetrating groove, a second thread matching the first thread is provided on an inner side wall of the first penetrating groove, and the length of the graduated sleeve accommodated in the adjusting cylinder is adjusted by the first thread and the second thread rotating . The adjustable torque screwdriver according to item 3 of the patent application scope, wherein the adjustable torque screwdriver further comprises an elastic member, one end of which is connected to one end of the first cylinder away from the adjustment cylinder, and the other end of which is connected to the rotating shaft. Stay away from the adjustment barrel. The adjustable torque screwdriver according to item 4 of the scope of patent application, wherein the graduated sleeve further includes a rear cover housed in one end of the first cylinder away from the polygonal cylinder, and the rear cap and the first cylinder are threaded. Connected, one end of the elastic member is connected to the back cover, and the other end is connected to one end of the rotating shaft away from the adjusting cylinder. The adjustable torque driver according to item 2 of the scope of patent application, wherein a third thread is provided on an outer side wall of the connection portion, and a first thread that is matched with the third thread is provided on an inner side wall of the fixing cover adjacent to the connection portion. Four threads, the fixed cover and the adjusting cylinder are connected to the fourth thread through the third thread. The adjustable torque driver according to item 2 of the scope of patent application, wherein the rotating shaft includes a first rod, a second rod connected to one end of the first rod, a projection connected to one end of the second rod, and received in the A magnet of the first rod, an opposite fifth receiving groove is provided on the outer side of the first rod, the magnet is received in the fifth receiving groove, the number of the receiving groove is plural, and the resistance portion includes a plurality of magnets The plurality of magnets are correspondingly received in the plurality of receiving grooves, and surround the magnets stored in the fifth receiving groove and mutually repel the magnets received in the fifth receiving groove to provide a mechanism for preventing the rotating shaft from rotating relative to the sleeve. resistance. The adjustable torque screwdriver according to item 7 of the scope of patent application, wherein the end of the projection away from the second rod is provided with a locking slot, and the screwdriver head includes a main body, a cylinder connected to one end of the main body, and connected to the cylinder. The card protrusion at one end far from the main body and the locking block connected to the one end of the card protrusion far from the cylinder, the length of the card 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 locking block passes through the third through hole and is received in the locking slot. The adjustable torque driver according to item 8 of the scope of patent application, wherein a side surface of the adjusting member is provided with a fourth through hole penetrating through the adjusting member, the locking member includes a main body and a cylinder with one end connected to the main body, The free end passes through the second through hole and the fourth through hole in sequence, the main body is received in the second receiving slot, and the fixing pin passes through the adjusting member and the free end of the cylinder to lock the adjusting member and the lock. The pieces are fixed to each other.