TWI785679B - Adjustable depth and screwdriver head adapter to avoid bolt head chipping - Google Patents

Abstract

A screwdriver head connecting rod with adjustable depth and avoiding bolt head collapse, including: a shaft; a shaft sleeve, which is rotatably socketed on a part of the shaft; a plurality of balls, which are clutchably arranged on the shaft Between the shaft sleeve; an outer sleeve, which has a pressing ring protruding inward in an annular shape, which is used to press the plurality of balls to form a clutch state; a spring, whose two ends are respectively against the shaft rod and the pressing ring; a setting The inner wall of the sleeve is threaded and screwed to the thread of the outer sleeve. By rotating the setting sleeve, the relative position of the setting sleeve relative to the outer sleeve can be changed, and the front end of the setting sleeve The edge is more forward than the front end edge of the shaft sleeve; and a setting ring is screwed on the thread of the outer sleeve and positioned behind the setting sleeve.

Description

Adjustable depth and screwdriver head adapter to avoid bolt head chipping

The present invention relates to a screwdriver head connecting rod, in particular to a screwdriver head connecting rod which can adjust the depth and prevent the bolt head from collapsing.

The new patent of the Republic of China No. M599235 "Clutch that can fix the depth" discloses a screwdriver head adapter that can prevent the bolt head from collapsing. It mainly uses a clutch mechanism between the cylinder and the sliding sleeve to interrupt the torque when necessary Or the transmission of kinetic energy, thereby using the clutch to limit the locking depth of the fastener.

In the above-mentioned prior art, the spring is located at the end of the cylinder shaft, and the two ends are against the cylinder shaft and the sleeve. This position of the spring is exposed to the workpiece, and it is easy to be affected by dust or moisture in the environment. The spring itself is not smooth, and the spring itself is easy to rust and cannot be used for a long time. In addition, the depth set by this prior art is fixed and cannot be adjusted, which can only be applied to a single type of bolt, and cannot be applied to different occasions or requirements.

European patent EP 3,231,559 B1 discloses a clutch rod with variable depth. Its main technology is that there is a felt washer at the front end. However, the felt washer in this case must be attached to two surfaces for abutment and bonding. It is not convenient to assemble. In addition, the shaft rod used in this case to connect with the electric tool, although the spring has been set between the elements and covered, however, the spring is It is arranged on the top of the movable sleeve 6, and such arranging spatial relationship will make the overall structure become very long, and its volume will be larger when assembled as a whole.

The main purpose of the present invention is to provide a screwdriver head adapter that can adjust the depth and prevent the bolt head from collapsing. It can adjust or change the set depth and is suitable for various bolts of different specifications.

Another object of the present invention is to provide a screwdriver head connecting rod with adjustable depth and avoiding bolt head chipping. Changing the design to fit the springs increases the overall length.

In order to achieve the above-mentioned purpose, the present invention proposes a screwdriver head connecting rod with adjustable depth and avoiding bolt head chipping. groove, the limit ring groove and the plurality of action grooves are separated by a predetermined distance, and the shaft protrudes a shoulder from the side to the outside; a shaft sleeve has a tool head slot at the front end, and a coupling groove at the rear end, and The combination groove is rotatably sleeved on the outer wall of a part of the shaft, at least one interference piece is fixed on the groove wall of the combination groove, and the at least one interference piece extends inward into the limit ring groove, and The groove wall of the combination groove is provided with a plurality of action holes, and when the shaft rod rotates to a predetermined position relative to the bushing, the plurality of action holes are respectively aligned with the plurality of action grooves; the plurality of balls can be movably placed in the plurality of action holes. A plurality of action holes; an outer sleeve, which is movably sleeved on the shaft rod and the outer side of the sleeve, and the inner wall of the outer sleeve has a pressing ring protruding inward in an annular shape, and the pressing ring is followed by the outer sleeve The movement of the outer sleeve covers or does not cover the plurality of action holes, the outer side of the outer sleeve is provided with threads, and the rear end of the outer sleeve has a baffle located behind the shoulder, and the baffle is attached to the outer sleeve. The movement of the cylinder can be against or not against the shoulder; a spring, two ends respectively against the shoulder At the shoulder and the pressing ring, the elastic force makes the outer sleeve move forward relative to the shaft; a setting sleeve has threads on the inner wall and is screwed to the threads of the outer sleeve, by Rotate the setting sleeve to change the front and rear relative position of the setting sleeve relative to the outer sleeve, and the front end edge of the setting sleeve is more forward than the front end edge of the sleeve; and a setting ring is screwed on the The thread of the outer sleeve is located behind the setting sleeve.

With the above technical features, the present invention can adjust or change the set depth, so as to be applicable to bolts of various specifications. In addition, the spring system of the present invention is covered inside, so it is not easy to be corroded by environmental moisture or dust, and can effectively maintain its good use state.

10: Screwdriver head rod with adjustable depth and avoiding bolt head chipping

11: shaft

12: Action slot

14: limit ring groove

16: shoulder

21: shaft sleeve

22: Tool head slot

24: Combination groove

26: Interference parts

28: Action hole

31: Ball

41: outer sleeve

411: end cap

412: Barrel

413: Thread

42: Compression ring

44: Baffle

46: Inner Arrival Ring

48:Front baffle

51: Spring

61: Setting sleeve

611: Buckle

613: Thread

62: soft collar

621: convex wall

64: Felt collar

71: setting ring

81: Tool head

91: Bolt

92: Bolt head

99: Workpiece

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of the action of a preferred embodiment of the present invention.

Fig. 5 is another schematic cross-sectional view of a preferred embodiment of the present invention, showing the state that the interference member is a ball.

Fig. 6 is a diagram of the first operation of a preferred embodiment of the present invention.

Fig. 7 is a diagram of the second operation of a preferred embodiment of the present invention.

Fig. 8 is a diagram of the third operation of a preferred embodiment of the present invention.

In order to describe the technical characteristics of the present invention in detail, the following preferred embodiments are given below and described in conjunction with the drawings, wherein:

As shown in Figures 1 to 4, a screwdriver head adapter 10 that can adjust the depth and prevent the bolt head from collapsing is proposed by a preferred embodiment of the present invention. It mainly consists of a shaft 11, a shaft sleeve 21, and multiple balls 31. , an outer sleeve 41, a spring 51, a setting sleeve 61 and a setting ring 71, wherein:

The shaft 11 is provided with a plurality of action grooves 12 annularly on its peripheral surface, and a limit ring groove 14 is arranged in an annular shape. The limit ring groove 14 is separated from the plurality of action grooves 12 by a predetermined distance. A shoulder 16 protrudes outward in a circular shape. In this embodiment, the limiting ring groove 14 is located behind the plurality of active grooves 12 , and the shoulder 16 is located behind the limiting ring groove 14 .

The shaft sleeve 21 has a tool head slot 22 at the front end, and a coupling groove 24 is formed at the rear end, and the coupling groove 24 is rotatably socketed on the outer wall of a part of the shaft rod 11, and the coupling groove 24 The groove wall is fixed with two interfering pieces 26, which are bolts in this embodiment. The two interfering pieces 26 extend inwardly into the limiting ring groove 14 of the shaft 11, thereby limiting the shaft 11 from Can move back and forth with respect to this axle sleeve 21. A plurality of action holes 28 are arranged around the groove wall of the combination groove 24 , and the plurality of action holes 28 are respectively aligned with the plurality of action slots 12 when the shaft 11 is rotated to a predetermined position relative to the sleeve 21 .

The plurality of balls 31 are movably placed in the plurality of action holes 28 . When the plurality of action holes 28 are respectively aligned with the plurality of action grooves 12 , the plurality of balls 31 will partially enter the plurality of action grooves 12 when being pushed to cause interference.

The outer sleeve 41 is composed of an end cap 411 and a barrel body 412 in this embodiment, and is movably sleeved on the outside of the shaft 11 and the sleeve 21. The inner wall of the outer sleeve 41 has an inward ring A pressing ring 42 protruding like a shape, and the pressing ring 42 covers or does not cover the plurality of action holes 28 with the movement of the outer sleeve 41, as shown in FIGS. 3 and 4 . The outer side of the outer sleeve 41 is provided with threads 413, and the rear end of the outer sleeve 41 has a baffle 44 located behind the shoulder 16, and an inner ring 46 is sleeved inside the outer sleeve 41. Abut ring 46 is to abut against the front end face of this baffle plate 44, and this inner abutment ring 46 is to abut against or Not against the shoulder 16 . The main function of the inner abutment ring 46 is to be used as a pad between the baffle plate 44 and the shoulder 16, and as the direct abutting part of the outer sleeve 41 against the shoulder 16, so that the outer sleeve 41 can The baffle 44 of the sleeve 41 is not easily deformed after repeated use, but if the inner abutment ring 46 is not provided, it is also possible to directly use the baffle 44 to abut against the shoulder 16. This case does not rely on the inner abutment ring 46. The setting of the ring 46 is necessary. In addition, the front end of the outer sleeve 41 also protrudes radially inwards with a front baffle 48 in an annular shape, and the front baffle 48 is located around the front end of the shaft sleeve 21 but does not touch the shaft sleeve 21, thereby providing The effect of blocking dust or foreign objects will not affect the rotation of the shaft sleeve 21.

Two ends of the spring 51 abut against the shoulder 16 and the pressing ring 42 respectively, and the elastic force of the spring 51 makes the outer sleeve 41 move forward relative to the shaft 11 .

The setting sleeve 61 has a thread 613 on the inner wall and is screwed to the thread 413 of the outer sleeve 41. By rotating the setting sleeve 61, the relative front and back of the setting sleeve 61 relative to the outer sleeve 41 can be changed. position, and the front end edge of the setting sleeve 61 is more forward than the front end edge of the shaft sleeve 21 .

The setting ring 71 is screwed to the thread 413 of the outer sleeve 41 and is located behind the setting sleeve 61 to provide a dead point for the backward displacement of the setting sleeve 61, thereby stabilizing the setting sleeve 61. position so that it is not likely to change its position due to accidental rotation.

In the foregoing structure, since the front end of the setting sleeve 61 is the frontmost part, it will be the part directly in contact with the workpiece 99 in actual use, because the general material of the setting sleeve 61 is metal, and the workpiece 99 is usually wood, in order to prevent the setting sleeve 61 from being too hard and destroying the workpiece 99, therefore, a soft collar 62 can be set on the front end of the setting sleeve 61, and the material of the soft collar 62 is different from that of the setting sleeve. The sleeve 61, and the hardness of the soft collar 62 is lower than that of the setting sleeve 61, for example, the setting sleeve 61 is made of metal, while the soft collar 62 is made of plastic. In this way, the soft collar 62 can be used to bear against the workpiece 99, and then perform corresponding operation actions. In addition, the soft collar 62 is free to Relative to the rotation of the setting sleeve 61, in actual implementation, a buckle 611 protrudes from the end of the setting sleeve 61 radially toward the axis, and the soft collar 62 has a protruding wall protruding outward along the peripheral surface 621, the outer diameter of the convex wall 621 is greater than the inner diameter of the buckle 611, the soft collar 62 is inserted into the end of the setting sleeve 61 through the convex wall 621, and the convex wall 621 is positioned after passing through the buckle ring 611 The back of the clasp 611, so that the soft collar 62 remains fastened on the setting sleeve 61 and will not fall out, and in such a buckled state, the soft collar 62 can be freely relative to The setting sleeve 61 rotates.

In addition, if the plastic material of the soft collar 62 is not soft enough, a felt collar 64 can also be arranged on the front end of the soft collar 62 by adhesive bonding. The front surface area of the felt collar 64 is The area of the front end surface of the soft collar 62 is larger, so that a softer element can be provided to resist the workpiece 99, making the workpiece 99 less susceptible to damage.

As shown in Figure 5, these two interfering parts 26 also can be balls, in this case, this pressing ring 42 just must always keep the state of covering this interfering part 26, to guarantee that this interfering part 26 really interferes with this Inside the limit ring groove 14.

The configuration of the present embodiment has been described above, and the operation state of the present embodiment will be described next.

As shown in Figure 6, before use, a tool bit 81 is inserted in the tool bit slot 22 earlier, and the shaft rod 11 is installed on an electric tool (not shown), and relative to the The outer sleeve 41 rotates the setting sleeve 61 and the setting ring 71 to the required position, and the workpiece 99 with a flat surface and the bolt head 92 of the bolt 91 must fully enter the workpiece 99 so that the workpiece 99 surface and the bolt head 92 tops are flush with each other, generally the front end of the tool head 81 is more behind than the front end of the felt collar 64. At this time, the elastic force of the spring 51 makes the outer sleeve 41 at the outermost end relative to the shaft sleeve 21, and the pressing ring 42 is pressed on the plurality of action holes 28, and the plurality of balls 31 interfere with the plurality of action holes 28 at this moment. Multiple action slots 12. in this way In this case, when the shaft 11 is mounted on an electric tool and is driven to rotate, the bushing 21 will rotate together due to the interference of the plurality of balls 31 , thereby driving the tool head 81 to rotate together. When in use, the tool head 81 is inserted into a cross groove (not shown) of a bolt head 92, and the shaft rod 11 is driven to rotate. At this time, the tool head 81 is driven to drive the bolt 91 to rotate. The bolt 91 continues to enter the workpiece 99 by the action of the thread of the bolt 91 itself.

As shown in FIG. 7 , when the bolt 91 enters the workpiece 99 until the felt collar 64 abuts against the workpiece 99 , the setting sleeve 61 together with the outer sleeve 41 cannot move forward and stops. At this time, the felt collar 64 will not rotate because it is against the workpiece 99, and the soft collar 62 will not rotate because it is attached to the felt collar 64. Even if the setting sleeve 61 And the outer sleeve 41 is driven to rotate by the rotation of the shaft rod 11 because of the assembly relationship, and because of the free rotation relationship between the soft collar 62 and the setting sleeve 61, it will not drive the soft collar 62 to follow Rotate, so the felt collar 64 will not be driven to rotate, thereby protecting the workpiece 99 from being abraded by the felt collar 64 due to rotation.

As shown in Figure 8, the user continues to apply pressure to overcome the elastic force of the spring 51, and force the shaft 11 and the sleeve 21 to continue to rotate and advance, and the bolt 91 continues to enter the workpiece 99 until the sleeve 21 reaches the The plurality of action holes 28 are no longer covered by the pressing ring 42. At this time, the plurality of balls 31 will be in a free state because they are not pressed, and will no longer interfere with the plurality of action grooves 12 ( 6 and 7), at this moment, the rotational moment of the shaft 11 can no longer act on the hole wall of the plurality of action holes 28 through the plurality of balls 31, so the shaft sleeve 21 is no longer supported by the shaft 11 is driven to rotate, that is, the tool head 81 and the bolt 91 will not be driven to rotate. At this moment, the shaft rod 11 is in an idling state.

After the present invention is moved away from this bolt 91 together with this tool head 81, this felt collar 64 of this setting sleeve 61 promptly does not stand against workpiece 99, and the elastic force of this spring 51 promptly promotes this outer sleeve 41 again together with this Set the sleeve 61 to move forward relative to the axle sleeve 21, if the plurality of action holes 28 are aligned with the plurality of action holes With the groove 12, the plurality of balls 31 will be pushed back into the plurality of action holes 28 and the plurality of action slots 12 by the pressing ring 42, and cover the plurality of action holes 28. If the plurality of action holes 28 are not aligned with the plurality of action slots 12 at this time, then as long as the shaft rod 11 is rotated slightly, the plurality of action holes 28 can be aligned with the plurality of action slots 12, so that the plurality of balls 31 can be aligned with the plurality of action slots 12. The function of the pressing ring 42 pushes into the plurality of action holes 28 and the plurality of action grooves 12, and covers the plurality of action holes 28, and then returns to the state of FIG. 6 .

It can be clearly understood from the above-mentioned action description that the present invention can adjust or change the set depth through the design of the setting sleeve 61 and the setting ring 71, and is suitable for various bolts 91 of different specifications or usage occasions. In addition, the spring 51 of the present invention is wrapped between the bushing 21 and the outer sleeve 41, and both ends also abut against the shoulder 16 and the pressing ring 42, and are hidden inside the element, which is not easily affected by the environment. water vapor or dust erosion, and because the spring 51 is located between the bushing 21 and the outer sleeve 41, it directly utilizes the original internal space without having to install the spring 51 Change the overall length to match.

In addition, by setting the soft collar 62 and the felt collar 64, and the soft collar 62 can freely rotate relative to the setting sleeve 61, the workpiece 99 can be more effectively protected, and the workpiece 99 It is less likely to be deformed or damaged by the pressure of the setting sleeve 61 .

10: Screwdriver head rod with adjustable depth and avoiding bolt head chipping

11: shaft

12: Action slot

14: limit ring groove

16: shoulder

21: shaft sleeve

22: Tool head slot

26: Interference parts

28: Action hole

31: Ball

41: outer sleeve

411: end cap

412: Barrel

413: Thread

44: Baffle

46: Inner Arrival Ring

51: Spring

61: Setting sleeve

613: Thread

62: soft collar

621: convex wall

64: Felt collar

71: setting ring

Claims (7)

A screwdriver head adapter with adjustable depth and avoiding bolt head chipping, comprising: A shaft with a plurality of action grooves annularly arranged on its peripheral surface, and a limit ring groove arranged in a ring shape, the limit ring groove and the plurality of action grooves are separated by a predetermined distance, and the shaft protrudes from the side to the outside with a shoulder department; A shaft sleeve with a tool head slot at the front end and a joint groove formed at the rear end, and the joint groove is rotatably sleeved on the outer wall of a part of the shaft rod, and at least one interference piece is fixed on the groove wall of the joint groove , the at least one interference member extends inwardly into the limit ring groove, and the groove wall of the combination groove is provided with a plurality of action holes, when the shaft rod rotates to a predetermined position relative to the sleeve, the plurality of The action holes are respectively aligned with the plurality of action slots; A plurality of balls can be movably placed in the plurality of action holes; An outer sleeve is movably sleeved on the shaft rod and the outer side of the shaft sleeve. The inner wall of the outer sleeve has a pressing ring protruding inward in an annular shape. The pressing ring is closed with the movement of the outer sleeve. Cover or not cover the plurality of action holes, the outer side of the outer sleeve is provided with threads, and the rear end of the outer sleeve has a baffle located behind the shoulder, the baffle is moved with the movement of the outer sleeve against or against that shoulder; a spring, the two ends of which are against the shoulder and the pressing ring respectively, the elastic force of which makes the outer sleeve move forward relative to the shaft; A setting sleeve, the inner wall surface is provided with threads and screwed to the threads of the outer sleeve, by rotating the setting sleeve to change the relative position of the setting sleeve relative to the outer sleeve, and the setting sleeve the front end edge is further forward than the front end edge of the bushing; and A setting ring is screwed on the thread of the outer sleeve and located behind the setting sleeve. According to the screwdriver head connecting rod with adjustable depth and avoiding bolt head collapse according to claim 1, wherein: the outer sleeve is sheathed with an inner abutment ring, and the inner abutment ring is abutted against the front end surface of the baffle plate , the inner abutting ring abuts against or does not abut against the shoulder with the movement of the outer sleeve. According to the screwdriver head connecting rod with adjustable depth and avoiding bolt head collapse according to claim 1, wherein: the front end of the outer sleeve has a front baffle protruding inward in an annular shape, and the front baffle is located at around but not touching the front end of the sleeve. According to the screwdriver head rod with adjustable depth and avoiding bolt head chipping as described in claim 1, a soft collar is further provided at the front end of the setting sleeve, and the material of the soft collar is different from that of the setting sleeve. And the hardness of the soft collar is lower than that of the setting sleeve, and the soft collar is free to rotate relative to the setting sleeve. According to the screwdriver head post with adjustable depth and avoiding bolt head chipping according to claim 1, wherein: the end of the setting sleeve protrudes radially toward the axis center with a buckle ring, and the soft collar has a ring extending outward along the peripheral surface A protrusion protruding, the outer diameter of the protrusion is larger than the inner diameter of the buckle, the soft collar is inserted into the end of the setting sleeve through the protrusion, and the protrusion is positioned on the buckle after passing through the buckle ring rear. According to the screwdriver head connecting rod with adjustable depth and avoiding the bolt head collapse described in claim 4, wherein: the front end of the soft collar is further provided with a felt collar, and the front surface area of the felt collar is larger than that of the soft collar The front face area of the ring. According to claim 1, the depth-adjustable and screwdriver-head post that can prevent the bolt head from collapsing, wherein: the interfering part is a pin or a steel ball.

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