TWI637823B - Rotatable fastening device and application method thereof - Google Patents

Abstract

The invention comprises a screw fastening device, which is composed of a rotating seat and an impact member which are screwed by a spiral segment. The rotating seat is correspondingly located at the rotating axis, and the rotating seat limits the impacting member to rotate on the spiral segment, and the impact The weight and kinetic energy of the piece provides a one-way tangential impact force around the axis of rotation. Thereby, the present invention can provide an additional tangential impact force when unscrewing, and a convenient effect of providing an instantaneous unscrewing torque under the condition of minimum occupied space.

Description

 Screw fastening device and application method thereof  

The present invention relates to a fastening device and a method of applying the same, and more particularly to a screw fastening device for applying an instantaneous unscrewing torque during a rotary fastening operation and a method of applying the same.

In recent years, hand tool products have gradually developed toward lighter weight, so various rotary fastening tools are also required to be lighter and smaller in size in response to market demands. However, for the loose release operation, whether the rotating screw, the nut or other tightening elements are loose, the loose rotation requires a large momentary torque to resist the long-term tightening of the rust or deformation, so as to ensure the correct Loose and removed. When a conventional fastening device such as an electric wrench is used for fastening with a sleeve, the motor of the electric wrench itself is limited to have a fixed upper limit of the torque, so that the electric wrench on the existing market is difficult to meet the miniaturization at the same time. Jiasong off the demand for the effect.

On the other hand, although the pneumatic wrench can generate higher torque to achieve higher release force, the conventional pneumatic wrench needs to match the air pump and the respective pipeline, and the pneumatic wrench itself has a large cylinder, so the air wrench volume It is difficult to shrink. The aforementioned problems also make the conventional pneumatic wrench unable to meet the trend of light weight and miniaturization.

In this regard, a torque control mechanism and a torque control method for developing a power tool similar to TWI520817 have been developed, which generally include a motor, a shifting gear set, a drive shaft, a strike group (such as a power output shaft, a seat block), and a control system. The transmission gear set is connected to one end of the motor for changing the rotational power of the motor output, the transmission shaft is coupled to the shift gear set, and the output shaft is coaxially connected to one end of the drive shaft in a rotatable manner for connecting the screwdriver The working joint of the sleeve and the sleeve is sleeved on the transmission shaft, and can be reciprocally displaced along a direction of the transmission shaft at a striking and releasing position, and one end of the output shaft and one end of the striking shaft respectively have a striking block. When the seat is moved to the striking position, each striking block can be correspondingly abutted and struck, so that the output shaft can be rotated and struck to generate a large instantaneous torque for loosening the screw or the nut.

Although the above-mentioned conventional patent technology can achieve the demand for increasing the tightening torque, the structure is complicated and the supporting mechanism is numerous, and it is not only unable to cooperate with the operation of various types of processing tools, but still does not meet the market demand for light weight and miniaturization characteristics.

In addition, in U.S. Patent Publication No. US20120255749A1, an integrally formed sleeve is proposed in which an annular gravitational ring member is integrally formed. Although the design of the design has been simplified, there is still no function of quickly disassembling the gravity member; in addition, the gravity ring member integrally formed on the conventional sleeve is not only difficult to manufacture, but also the above-mentioned conventional use may cause damage due to excessive moment force during fastening work. The integrated design of the processed object also wastes more driving energy.

According to the above, how to integrate the lightweight, miniaturization and fastening effects of the rotary fastening device is an important issue that is expected to be solved by today's hand tool developers and machine tool manufacturers.

Therefore, the present invention provides a screw fastening device capable of providing an instantaneous unscrewing torque and an application thereof. The spiral rotation of the impact member on the rotary seat and the movement of the clicker enable the impact member to generate a single rotation around the axis of rotation. The tangential impact force, the one-way tangential impact force instantaneously causes the impact member to rotate the rotating seat for a moment to loosen the torsion force, thereby increasing the instantaneous unscrewing torque to drive the rotating member to be loosened.

According to a structural aspect of the present invention, a screw fastening device is provided, the screw fastening device being coupled between an impact driving tool and a to-be-swivel member. The screw fastening device comprises a rotating seat and an impact member. The rotating seat rotates along a rotating shaft, and the rotating base has a driving end and a fastening end, the driving end is detachably connected to the impact driving tool, and the fastening end is detachably coupled to drive the rotating member, the rotating seat There is a spiral segment, and the spiral segment has an end. The impact member is pivotally screwed on the spiral segment, and when the rotary seat is restricted by the to-be-rotated member in a first rotational direction without being rotated, the impact member is driven by an impact force of the impact driving tool, so that the impact member is impacted. The driving tool is driven to rotate to the end of the spiral segment, so that the end of the impact member is increased by a one-way tangential impact force around the rotation axis. On the other hand, the user can also first rotate the impact member to the end of the spiral segment, and then directly increase the impact of the impact member by the impact driving tool.

According to the structure of the present invention, when the screw to be rotated is rotated, the momentary loosening torque is increased, so that the to-be-rotated member is smoothly rotated and released, and the screw is no longer troubled. The wire, nut or screw is rusted or deformed by long-term fastening. In addition, the invention has a simple structure, does not occupy space, and can be disassembled according to requirements. Therefore, the embodiment of the present invention can not only increase the instantaneous unscrewing torque, but also achieve the industrial demand for miniaturization, weight reduction, and increase of the matching change.

Other implementations of the foregoing embodiments may be followed by the following; the aforementioned spiral segment may be a right-handed spiral (and the left-handed screw is rotated to the left) or a left-handed spiral (and the right-to-spin is to be rotated). The aforementioned first direction of rotation is a leftward unscrewing direction or a rightward unscrewing direction. An anti-rotation device may be disposed on the spiral segment. The anti-rotation device is a return spring embedded in the surface of the rotating base. The shape of the impact member may be an annular shape, a triangular shape, a radial shape, a convex rod shape or a convex block shape. The distance between the spiral segment and the driving end may be smaller than the distance between the spiral segment and the fastening end to effectively transmit the torque. In addition, a torque detecting unit can be arranged on the rotating base to detect the effective torque value.

According to the method aspect of the present invention, a method for applying a screw fastening device is provided, which is applied to the aforementioned screw fastening device, and the application method of the screw fastening device comprises a pre-spinning step and a unscrewing step. In the pre-screwing step, the impact force of the impact driving tool is received by the rotating seat, but the rotating seat is restricted by the to-be-rotated member without being rotated in the first rotating direction (in the unscrewing direction). In the unscrewing step, the impact member receives the impact force of the impact driving tool, so that the impact member is driven by the impact driving tool and is rotated to the end of the spiral segment, so that the end of the impacting member has a one-way tangential impact around the rotating axis. The force, the one-way tangential impact force instantly causes the impact member to interlock with the rotating seat to increase the moment of unscrewing torque, thereby driving the to-be-swiveled member. Thereby, the method of the invention can generate an instantaneous unwinding torque when the screw is released, so that the to-be-rotated member is smoothly rotated and disengaged. On the other hand, the user can also let the impact piece first Rotate to the end of the spiral segment and tighten the impact member directly by the impact drive tool for a moment to loosen the torque.

The method may further include a tightening driving step and an impact member non-coupling step; in the tightening driving step, the rotating base is driven by the impact driving tool to rotate in the second rotating direction (in the tightening direction), and the rotating seat is in the The two directions of rotation drive the screw to be screwed. In the step of non-coupling of the impacting member, when the rotating seat drives the rotating member to rotate in the second rotating direction, the impacting member simultaneously receives the impact force of the impact driving tool and rotates in the second rotating direction, and the impacting member is away from the end of the spiral segment. , causing the impact member to remain uncoupled to the rotating seat. Thereby, the method of the invention can avoid the momentary increase of the torsion force when the screwing is tightened, so that the to-be-rotated member is excessively locked.

100‧‧‧Spiral fastening device

110‧‧‧ rotating seat

111‧‧‧ fastening end

112‧‧‧Driver

1121‧‧‧ steel balls

113‧‧‧Spiral segments

End of 1131‧‧

120‧‧‧ impact parts

121‧‧‧ protruding rod

122‧‧‧ pivoting

1221‧‧‧ internal thread

130‧‧‧Anti-rotation device

131‧‧‧protrusion

130A‧‧‧Anti-rotation device

131A‧‧‧ steel balls

132A‧‧‧Return spring

200‧‧‧ Impact Drive Tools

300‧‧‧waiting to rotate

400‧‧‧Application method

410‧‧‧Pre-spinning steps

420‧‧‧Rolling steps

F‧‧‧ one-way tangential impact

Y‧‧‧ Instantly loosening the torque

X‧‧‧Rotary axis

1 is a combined perspective view of an embodiment of a screw fastening device; FIG. 2 is an exploded perspective view of the screw fastening device of FIG. 1; and FIG. 3 is a plan sectional view of the screw fastening device of FIG. FIG. 4 is a view showing a state of use of the screw fastening device in FIG. 3; FIG. 5A is a schematic view showing the loosening operation of the present invention; FIG. 5B is a schematic view showing the locking operation of the present invention; A flow chart of method steps; and FIG. 7 is a plan cross-sectional view showing another embodiment of the screw fastening device of the present invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are illustrated in the drawings in a simplified schematic manner, and the repeated elements may be represented by the same reference numerals.

1 to 4, FIG. 1 is a combined perspective view showing an embodiment of a screw fastening device, and FIG. 2 is an exploded perspective view showing the screw fastening device of FIG. 1; Fig. 4 is a plan sectional view showing the screw fastening device of Fig. 1; and Fig. 4 is a view showing a state of use of the screw fastening device of Fig. 3. According to the structural aspect of the present invention, a screw fastening device 100 is provided which is disposed between an impact driving tool 200 and a to-be-swivel member 300. The screw fastening device 100 includes a rotating base 110, an impact member 120 and an anti-rotation device 130.

The rotating base 110 has a round rod shape, and a fastening end 111 and a driving end 112 are respectively formed at two ends of the rotating base 110. The fastening end 111 is a hexagonal hole for detachably connecting the component to be rotated 300 (for example, an element such as a screw, a nut and a screw). The driving end 112 is an inner hole having a positioning function of the steel ball 1121, and the driving end 112 can be used to drive the tool 200 (for example, an electric wrench or an air wrench). The rotary base 110 rotates along a rotational axis X. The rotating base 110 has a spiral segment 113, the spiral segment 113 is a right-handed spiral, and the outer end of the spiral segment 113 near the driving end 112 has an end 1131. The distance between the spiral segment 113 and the driving end 112 is smaller than the distance between the spiral segment 113 and the fastening end 111, thereby effectively transmitting the torque. A torque detecting unit (not shown) may be embedded in the rotating base 110 to detect an effective torque value.

The impact member 120 is an annular body, and the outer shape of the impact member 120 is integrally formed with three arrow-shaped protruding rods 121, and the inertia kinetic energy is formed by the rotational displacement of the weight of the protruding rod 121. A pivot hole 122 is formed in the center of the impact member 120, and the inner thread 1221 is completely formed on the inner side of the pivot hole 122. The internal thread 1221 of the pivot hole 122 is correspondingly screwed on the spiral segment 113 of the rotary base 110. The spiral rotation of the aforementioned internal thread 1221 and the spiral segment 113 is restricted by the end 1131. Moreover, the number of threads of the spiral segment 113 is larger than the number of threads of the internal thread 1221.

The anti-rotation device 130 is a protruding circlip and is embedded on the aforementioned spiral segment 113. The anti-rotation device 130 is embedded in the opposite end of the end 1131 (the entrance end of the impact member 120 is screwed), and the anti-rotation device 130 has a protrusion 131 that can be lifted and lowered, and the protrusion 131 is initially resisted. The thread 1221 is loosened during operation, and the protrusion 131 that can be lifted and lowered allows the impact member 120 to be smoothly screwed into the spiral segment 113.

Referring to FIG. 5A, FIG. 3, FIG. 4 and FIG. 6 , FIG. 5A is a schematic diagram of the loosening operation of the present invention, and FIG. 6 is a flow chart of the method steps. The method of the present invention provides a method 400 for applying a screw fastening device to the aforementioned screw fastening device 100. The method 400 for applying the screw fastening device 100 includes a pre-spinning step 410 and a unscrewing step 420.

In the pre-screwing step 410, the rotating seat 110 receives the impact drive The impact force of the tool 200 is a momentary impact of a hammer (not known in the prior art and not shown) in the impact driving tool 200. The output shaft of the impact driving tool 200 is rotated to the left by intermittently hitting the hammer. Turn torque. Although the aforementioned fastening end 111 can be coupled to drive the to-be-swimmed member 300, when the to-be-swildered member 300 is sewn by rust or deformation of long-term fastening, the rotating base 110 will be in the first rotational direction (in the unscrewing direction). The card to be rotated 300 is restricted from being jammed and cannot be rotated.

In the unscrewing step 420, although the rotating base 110 fails to rotate, the impacting member 120 can indirectly receive the intermittent impact force of the impact driving tool 200, so that the impacting member 120 is driven by the impact driving tool 200 to quickly rotate to the left. The acceleration inertia of the arrow-shaped protruding rod 121 is rotated, and the impact member 120 is displaced along the rotation axis X by the internal thread 1221 on the right-handed spiral segment 113 until the impact member 120 is engaged with the end 1131 to generate a single rotation around the rotation axis X. The tangential impact force F, and the one-way tangential impact force F of the impact member 120 instantaneously rotates the rotary seat 110 to generate an instantaneous unscrewing torque Y (ie, inertia), thereby instantaneously loosening the torque Y to drive the to-be-swivel member 300 to be loose. . Thereby, the method of the present invention can generate an instantaneous unscrewing torque Y when the screw is released, so that the to-be-rotated member 300 is smoothly rotated and disengaged.

Please refer to FIG. 5B, and FIG. 5B is a schematic view showing the locking operation of the present invention. The method of the present invention may further comprise a step of driving and a step of non-coupling of the impact member 120. In the step of tightening the driving, the rotating base 110 is rotated by the impact driving tool 200 in the second rotating direction (in the tightening direction), and the rotating base 110 drives the rotating member 300 to be screwed to the right in the second rotating direction. In the non-coupling step of the impacting member 120, when the rotating base 110 drives the rotating member 300 to rotate to the right in the second rotating direction, the impacting member 120 simultaneously receives the impact driving tool. The intermittent impact force of 200 is rotated in the second rotation direction (to the right), and the impact member 120 is rapidly rotated with the acceleration inertia of the arrow-shaped protruding rod 121 rotating to the right, and the impact member 120 has a high right-hand rotation speed. The rotary seat 110 rotates rightward, so that the impact member 120 intermittently moves away from the end 1131 of the spiral segment 113, so that the impact member 120 remains in a state of not interlocking with the rotary base 110. Thereby, the method of the invention can avoid the momentary increase of the torsion force when tightening, and also effectively avoid the situation that the rotary member 300 is excessively locked.

It is worth mentioning that the aforementioned spiral segment can also be left-handed, and the to-be-swivel member is a reverse threaded screw member, and the first rotation direction is a rightward rotation direction, so the invention is equally applicable to the reverse direction. The operation of the threaded screw.

Finally, please refer to FIG. 7. FIG. 7 is a plan sectional view showing another embodiment of the present invention, and the embodiment is not described in detail in the same manner as the foregoing embodiment. The anti-rotation device 130A of this embodiment includes two steel balls 131A and two return springs 132A, and the return springs 132A and the steel balls 131A are sequentially embedded on the spiral segments 113 of the rotary base 110. The steel ball 131A of the anti-rotation device 130A is retractably protruded beside the opposite end (not numbered) of the end 1131, so that the anti-screwing device 130A can vertically lift the reset steel ball 131A to initially resist the internal thread 1221 of the impact member 120, In order to prevent the impact member 120 from being loosened during operation, the liftable and retractable steel ball 131A allows the impact member 120 to be smoothly screwed into the spiral segment 113.

It can be seen from the foregoing embodiments and examples that the screw fastening device and the application method thereof according to the present invention can integrate the two purposes of loosening and increasing the torque and tightening without adding torque. By the structure of the invention, an instantaneous unwinding torque can be generated during the rotation to make the rotating member to be smoothly rotated and released, and it is no longer troubled by the long-term fastening of the screw, the nut or the screw to rust or deform. At the same time, it does not cause excessive tightening on the rotating member. In addition, the invention has a simple structure, does not occupy space, and can be disassembled according to requirements. Therefore, the embodiment of the present invention can not only generate an instantaneous unwinding torque, but also achieve the industrial demand for miniaturization, weight reduction, and increase of the matching change.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

Claims (12)

A screw fastening device is coupled between an impact driving tool and a to-be-swivel member. The screw fastening device comprises: a rotating base rotating along a rotating axis, and the rotating base has a driving end and a a fastening end, the driving end is detachably coupled to the impact driving tool, and the fastening end is detachably coupled to drive the to-be-swiveled member, the rotating base has a spiral segment having an end; An impact member pivotally screwed on the spiral segment, and the impact member is impacted by one of the impact driving tools when the rotating seat is restricted by the to-be-swivel member in a first rotational direction without being rotated The driving member rotates the impact member to the end of the spiral segment, so that the impact member latches the end to increase a one-way tangential impact force around the rotation axis. The screw fastening device of claim 1, wherein the spiral segment is right-handed, the screw to be rotated is a screw, and the first direction of rotation is a leftward unscrewing direction. The screw fastening device of claim 1, wherein the spiral segment is left-handed, the screw to be rotated is a screw, and the first direction of rotation is a right-slung direction. The screw fastening device of claim 1, wherein the spiral segment is provided with an anti-rotation device. Spiral fastening device as described in claim 4 The anti-rotation device is a return spring embedded in the surface of the rotating base. The screw fastening device of claim 4, wherein the anti-rotation device comprises at least one steel ball and a return spring, and the return spring and the steel ball are sequentially embedded in the spiral segment of the rotary seat. Upper, and the steel ball is retractably raised beside the opposite end of the end. The screw fastening device according to claim 1, wherein the impact member has an annular shape, a triangular shape, a radial shape, a convex rod shape or a convex block shape. The screw fastening device of claim 1, wherein the distance between the spiral segment and the driving end is less than the distance between the spiral segment and the fastening end. The screw fastening device of claim 1, wherein the rotating base is provided with a torque detecting unit. The screw fastening device of claim 1, wherein the number of threads of the spiral segment is greater than the number of threads on the impact member. An application method of the screw fastening device according to any one of claims 1 to 10, the method comprising: a pre-spinning step, the rotating seat receiving the punch of the impact driving tool a striking force, but the rotating seat is restricted by the to-be-swivel member without being rotated in the first rotating direction; and a loosening driving step, the impacting member receives the impact force of the impact driving tool, and the impacting member is rotated to The end of the spiral segment causes the impact member to latch the end to generate the one-way tangential impact force around the rotation axis, and the one-way tangential impact force instantaneously causes the impact member to interlock the rotary seat to increase the moment of loosening torque Thereby driving the to-be-swivel. The application method of the screw fastening device according to claim 11, wherein the method further comprises the following steps: a tightening driving step, the rotating base is rotated by the impact driving tool in a second rotation direction, and the rotation The seat is driven in the second rotation direction to rotate the to-be-swivel member; the impact member does not cooperate, and the impact member simultaneously receives the impact drive tool when the rotation seat rotates the to-be-swivel member in the second rotation direction The impact force is rotated toward the second rotation direction, and the impact member is moved away from the end of the spiral segment, so that the impact member does not interlock with the rotary seat.