TWM599235U - Depth-fixable clutch - Google Patents

Abstract

The clutch of this creation includes: a cylinder; a cylinder shaft with a circular groove for receiving the cylinder, and the cylinder shaft can rotate with the cylinder; a sleeve sleeve outside the cylinder shaft to form a sliding sleeve, sliding along In the direction of the sleeve axis, the sleeve and the barrel axis move linearly with each other. A centrifugal mechanism is arranged between the cylinder and the sliding sleeve to interrupt the transmission of torque or kinetic energy. During the locking operation, the clutch restricts a fastener to maintain a constant depth.

Description

Depth-fixable clutch

This creation relates to the technology of restricting the degree of locking, especially a kind of clutch, which restricts a fastener to perform a deep fixed locking operation.

In common people's perception, the fastener has a head, which is designed as a whole with a screw. A tool has a driving end, which is detachably combined with the head to drive the screw to rotate into the two workpieces. The fastener makes the two workpieces together, which is called locking operation. After the screw is removed, the two workpieces can be separated, which is called a loosening operation.

When locked, the screw receives the torque of the tool and continues to penetrate into the workpiece without stopping because the head contacts the surface of the workpiece, causing the head to damage the structure of the workpiece, or the workpiece to destroy the structure of the fastener.

Therefore, how to improve the fastening technology of fasteners has become an urgent issue for this creation.

In view of this, the author of this case provides a clutch whose main purpose is to adopt a centrifugal structure to interrupt the torque transmission during the locking operation and limit the fastener to maintain a constant depth.

Due to the achievement of the above-mentioned purpose, the clutch of this creation includes: a cylinder; a cylinder shaft with a circular groove for receiving the cylinder; the cylinder shaft can rotate with the cylinder; a sleeve sleeve outside the cylinder shaft to form a sliding The sleeve, along the axis of the sliding sleeve, the sleeve and the cylinder shaft move linearly with each other. A centrifugal mechanism is arranged between the cylinder and the sliding sleeve to interrupt the transmission of torque or kinetic energy.

The centrifugal mechanism includes: a set of beads; a set of drop portions are formed on the outer surface of the cylinder along the circumferential direction, two adjacent drop portions are separated by a raised portion; a set of holes penetrate the cylindrical shaft to form a circular groove When the inner side of the sleeve seals one end of the hole, the bead enters the corresponding drop through the other end of the hole, and the raised part drives the cylindrical shaft to rotate in the same direction with the cylinder through the bead and the hole; and, a circle of concave The groove sinks into the inner side of the sleeve, and the notch of the groove closed on the surface of the cylindrical shaft is normal. When the height of the drop part, hole and groove are the same, the bead leaves the drop part and enters the groove, causing the cylinder to rotate idly in the circular groove. No work.

In this way, the clutch of this creation interrupts the transmission of torque or kinetic energy through the centrifugal mechanism. During the locking operation, the clutch restricts a fastener to maintain a constant depth.

In order to make the purpose, features and advantages of this case more simple and understandable, one or more preferred embodiments are given as follows in detail with the accompanying drawings.

FIG. 1 is a perspective view showing the first embodiment of the clutch 10, including but not limited to: a cylinder 11, a cylindrical shaft 20 and a sleeve 30. Figure 2 is a cross-sectional view showing the internal structure of the clutch 10 assembled.

It is not difficult to understand from Figures 1 and 2 that the barrel shaft 20 is inserted into the sleeve 30 (or the sleeve 30 is sleeved outside the barrel shaft 20), and the two form a sliding sleeve 40. Along the axial direction of the sliding sleeve 40, the cylindrical shaft 20 and the sleeve 30 move linearly with each other. Wherein, a groove 33 is formed on the inner side 31 of the sleeve 30 for inserting a C-shaped baffle 42. The baffle plate 42 is substantially parallel to a bottom ring 32, the bottom ring 32 stands on the inner side 31 of the sleeve 30 along the radial direction, and the matching cylinder shaft 20 contacts the two ends of a compression spring 41. The force of the compression spring 41 moves the bottom ring 32 of the sleeve 30 away from the cylindrical shaft 20. The cylindrical shaft 20 is blocked by the blocking piece 42 and will not leave the sleeve 30, so the blocking piece 42 serves as the end point of the movement stroke of the cylindrical shaft 20 relative to the sleeve 30.

Secondly, the sliding sleeve 40 also has a cap 44. The cap 44 is provided with a through hole 48 with a cross-sectional surface like an H shape. One of the two ends of the through hole 48 receives a magnet 47, and the other end receives the end of the sleeve 30.部与一个固定环46。 Department with a fixed ring 46. The magnet 47 is a ring-shaped permanent magnet. The outer side of the permanent magnet is compressed by the cap 44 to enclose the wall surface of the through hole 48. The inner side of the permanent magnet can reach the cylindrical shaft 20 through the through hole 48, the bottom ring 32 and the compression spring 41.的一个角槽23。 23. The fixing ring 46 clamps a ring groove 45 of the cap 44 and a ring groove 35 on the outer side 34 of the sleeve 30 so that the cap 44 and the sleeve 30 will not easily fall off.

In this embodiment, the angular groove 23 and the circular groove 21 are at both ends of the cylindrical shaft 20, and the two are not connected. In addition, the wall of the cylindrical shaft 20 surrounding the angle groove 23 forms a ring groove 24 for receiving a buckle ring 25.

In some embodiments, the corner groove 23 and the round groove 21 communicate with each other, which is also within the scope allowed by this creation.

Then, the cylinder 11 enters a circular groove 21 of the barrel shaft 20 through the stopper 42. The other buckle 43 simultaneously clamps a ring groove 12 on the outer surface of the cylinder 11 and the wall surface of the circular groove 21 enclosed by the cylindrical shaft 20 sinks into the other ring groove 22. Therefore, the retaining ring 43 prevents the cylinder 11 from being pulled away from the cylinder shaft 20, but does not interfere with the mutual rotation of the cylinder 11 and the cylinder shaft 20. The cylinder 11 extends outward along the axial direction with a section of corner post 13 which increases the length of the cylinder 11 and can be combined with a tool (not shown in the figure), such as a wrench, an electric wrench or a pneumatic tool. A neck 14 is formed at the position where the corner post 13 extends beyond the sleeve 30 to help the corner post 13 connect to the tool and prevent the clutch 10 from leaving easily.

In addition, the clutch 10 is provided with a centrifugal mechanism, which is arranged between the cylinder 11 and the sliding sleeve 40 to interrupt the torque or kinetic energy transmitted by the tool.

Specifically, the centrifugal mechanism includes: a set of beads 50, a set of drop portions 51, a set of holes 52, and a ring of grooves 53. In this embodiment, the set of drop portions 51 are formed on the outer surface of the cylinder 11 along the circumferential direction. Each drop portion 51 is a closed slot, and two adjacent slots are separated by a bulge. The set of holes 52 penetrate the wall of the circular groove 21 that the cylindrical shaft 20 encloses, and the holes 52 receive the corresponding beads 50 against the drop portion 51. Because the sum of the depth of the hole 52 and the drop portion 51 is equal to or greater than the diameter of the bead 50, the bead 50 enters the drop portion 51 of the cylinder 11 through one end of the hole 52, and the inner side 31 of the sleeve 30 seals the other end of the hole 52, The bead 50 is prevented from leaving the hole 52. The groove 53 sinks into the inner side 31 of the sleeve 30 and is interposed between the bottom ring 32 and the blocking piece 42. The depth of the groove 53 is approximately equal to the depth of the drop portion 51, and the outer surface of the cylindrical shaft 20 closes the notch of the groove 53 as normal.

As shown in FIG. 3, a non-slip surface 36 is formed on the outer side 34 of a part of the sleeve 30. In addition, the cap 44 also has a non-slip surface 49 on a part of its outer surface. A user grips the non-slip surfaces 36, 49 of the sliding sleeve 40, which is enough to easily install a screwdriver head 60 on the clutch 10 without worrying about slipping off. After installation, a driving end 61 of the driver head 60 is exposed outside the cap 44 (or the sliding sleeve 40).

FIG. 4 is a cross-sectional view showing the internal structure of the clutch 10 and the driver bit 60. Figure 5 is also a cross-sectional view showing the centrifugal mechanism inactive. It is not difficult to understand from FIGS. 4 and 5 that the screwdriver head 60 has a set of notches 62, and the group of notches 62 is trapped in each corner of the screwdriver head 60. When the driver bit 60 is inserted into the angular groove 23 of the barrel shaft 20, the buckle ring 25 clamps the corresponding notch 62 to prevent the driver bit 60 from being separated from the sliding sleeve 40.

During the locking operation, the driving end 61 is inserted into the head 64 of a fastener 63 to connect the screwdriver head 60 and the fastener 63 together to complete the pre-operation. At this moment, the head 64 is in the magnetic field of the magnet 47, and the magnetic force of the magnet 47 will attract the head 64, so there is no need to worry about the fastener 63 falling off the sliding sleeve 40 and falling.

The corner post 13 receives the torque of the tool and drives the cylinder 11 to rotate. The bulge 54 pushes the ball 50 to contact the wall around the hole 52, drives the barrel shaft 20 to rotate the screwdriver head 60 in the same direction, and transmits the rotational kinetic energy of the tool to the head 64 through the drive end 61, and the fastener 63 is rotated to perform a locking action.

The fastener 63 also has a screw 65, and the screw 65 and the head 64 are designed as one piece. When the head 64 rotates, the screw 65 can lock into (or withdraw) two workpieces 66.

Figure 6 is an action diagram, with the centrifugal mechanism shown in Figure 7 showing the activated state, to further explain the principle that the clutch 10 limits the locking depth of the fastener 63 to be constant. It is known from FIGS. 6 and 7 that the cap 44 is blocked by the work piece 66, so that the sleeve 30 stands on the surface of the upper work piece 66, but does not move in the same direction with the barrel shaft 20. Therefore, the sleeve 30 guides the cylindrical shaft 20 to smoothly move linearly.

When the heights of the drop 51, the hole 52 and the groove 53 are the same, the closed relationship between the sleeve 30 and the hole 52 is released, so that the opening of the hole 52 is no longer sealed by the inner side 31 of the sleeve 30, so that the drop 51 passes through the hole 52 faces the groove 53. At the same time, draw a virtual tangent line (Tangent Line) that intersects the circumference of the cylinder 11, and apply a force (also called centrifugal force) to the rotating cylinder 11 to make the bead 50 fall into the groove 53 along the tangent direction. .

At this moment, the sum of the depth of the groove 53 and the hole 52 is equal to or greater than the diameter of the bead 50, so the bead 50 no longer blocks the bulge 54. Because the cylinder 11 is idling and does not perform work in the circular groove 21, the fastener 63 feeds back a reaction force through the screwdriver head 60 to counteract the unpowered cylindrical shaft 20, causing the cylindrical shaft 20 and the screwdriver head 60 to stand still. The fastener 63 naturally does not move. Will go deep into artifact 66. The sleeve 30 activates the centrifugal mechanism like a switch, interrupts the torque transmission of the tool, and limits the driver head 60 to drive the fastener 63 to maintain a constant locking depth.

In addition, the cylindrical shaft 20 is close to the workpiece 66 and presses the compression spring 41 relatively. When the tool is cut off, the corner post 13 no longer rotates. As the tool leaves the workpiece 66, the barrel shaft 20 returns to its original shape to allow the barrel shaft 20 and the sleeve 30 to move mutually to provide the force required for the sliding sleeve 40 to return to its position. The wall of the groove 53 is tangential to the spherical surface of the bead 50, and the bead 50 is retracted into the drop portion 51 through the hole 52. The inner side 31 of the sleeve 30 again closes the open end of the hole 52 as shown in FIG.

Fig. 8 is a perspective view showing the zero (group) parts of the second embodiment of the clutch 10 after being removed. Figure 9 is a cross-sectional view showing that these zero (group) parts are combined to form the internal structure of the second embodiment of the clutch 10. As shown in Figures 8 and 9, the clutch 10 is based on the same principle of the first embodiment, and the following changes are made to the second embodiment in terms of structure, which can also limit the fasteners to maintain a constant locking depth.

In terms of the "centrifugal mechanism", the drop portion is a semi-closed cavity 15 with one end closed and the other end extending to the free end of the cylinder 11. Therefore, the set of cavities 15 are like tooth grooves, so that the cylinder 11 has a set of straight teeth 16 like a gear. The spur teeth 16 are used as ridges and can separate two adjacent cavities 15.

Wherein, the position of the retaining ring 43 and the hole 52 in the circular groove 21 are mutually adjusted, and the connection relationship between the cylinder 11 and the cylindrical shaft 20 is not affected. At the same time, the total depth of the hole 52 and the slot 15 is equal to or greater than the diameter of the bead 50. The inner side 31 of the sleeve 30 seals one end of the hole 52 so that the bead 50 is located between the hole 52 and the slot 15 and cannot leave. In this way, the straight tooth 16 pushes the bead 50 to contact the wall around the hole 52, and the cylinder 11 can also drive the barrel shaft 20 to rotate.

Then, the groove 53 increases the width of the groove 53 along the axial direction of the sleeve 30. However, the depth of the groove 53 in the sleeve 30 in the radial direction does not change, so the sum of the depth of the groove 53 and the hole 52 is equal to or greater than the diameter of the bead 50. The bead 50 leaves the cavity 15 in response to the centrifugal force, or falls into the groove 53 through the hole 52 to interrupt the torque transmission of the tool. Therefore, the cylinder 11 idly rotates in the circular groove 21 and does no work, so as to achieve the function of maintaining a constant locking depth of the fastener.

In terms of "zero (set) pieces", the outer side of the barrel shaft 20 has two segments with different diameters, and an annular shoulder 26 connecting the two segments. The compression spring 41 is sleeved on the periphery of the section with a smaller diameter and abuts the shoulder 26 to provide the required force of the cylindrical shaft 20.

The sleeve 30 does not have a baffle plate and a bottom ring, but an upper ring 37, a groove 38, a blocking portion 39 and a barrel opening 70 are added. Wherein, the upper ring 37 protrudes from the inner side 31 of the sleeve 30 in the radial direction. The upper ring 37 replaces the original baffle and can prevent the cylindrical shaft 20 from leaving the sleeve 30 by the force of the compression spring 41. The diameter of the groove 38 and the barrel opening 70 is larger than the diameter of the groove 53, the barrel opening 70 passes through the end of the sleeve 30, and the groove 38 is closer to the upper ring 37 than the barrel opening 70. The blocking portion 39 is a ring-shaped rib whose diameter is smaller than the diameter of the groove 38 or the barrel opening 70 and is sufficient to separate the groove 38 and the barrel opening 70.

A piece of buckle 74 enters the groove 38 through the barrel opening 70 and forms a latching relationship with the blocking portion 39. The buckle 74 cooperates with the shoulder 26 to contact both ends of the compression spring 41, so that the sliding sleeve 40 has the force required for reciprocating motion. Therefore, the retaining ring 74 replaces the original bottom ring.

There is no cap, but a plug body 71 is added, and a ring of uneven pressing surface 72 is formed on the outer side of the plug body 71 in the circumferential direction. When the plug body 71 is inserted into the barrel opening 70 of the sleeve 30, the pressing surface 72 presses the sleeve 30 to form a wall surface of the barrel opening 70 so that the plug body 71 does not easily leave the sleeve 30.

In addition, the plug body 71 is an annular body, and a set of ribs 73 are raised along the axial direction inside the annular body. When the magnet 47 is placed in the plug body 71, the set of ribs 73 make the magnet 47 firmly on the plug body 71 and not easily leave.

10: Clutch 11: Cylindrical 12, 22, 24, 35, 45: ring groove 13: corner post 14: neck 15: Slot 16: straight tooth 20: tube shaft 21: round groove 23: corner slot 25, 43, 74: buckle 26: Shoulder 30: sleeve 31: Inside 32: bottom ring 33, 38: groove 34: Outside 36, 49: non-slip surface 37: Sheung Wan 39br blocking part 40: Sliding sleeve 41: Compression spring 42: baffle 44: Cap 46: fixed ring 47: Magnet 48: Through hole 50: Bead 51: Drop 52: hole 53: Groove 54: Prominence 60: Screwdriver head 61: drive end 62: gap 63: Fastener 64: head 65: screw 66: Workpiece 70: tube mouth 71: plug body 72: Urgent Side 73: rib

Figure 1 shows the assembled parts of the first embodiment of the creative clutch. Figure 2 depicts the internal structure of the first embodiment of the clutch assembled. Figure 3 presents the pre-work before the clutch is locked. Figure 4 depicts the clutch performing a locking action. Figure 5 shows the state where the centrifugal mechanism is not activated. Figure 6 shows that the clutch has completed its locking operation. Figure 7 shows the starting state of the centrifugal mechanism. Figure 8 shows the assembled parts of the second embodiment of the creative clutch. Figure 9 depicts the internal structure of the second embodiment of the clutch assembled.

10: Clutch

11: Cylindrical

12, 22, 24, 35: ring groove

13: corner post

14: neck

20: tube shaft

21: round groove

23: corner slot

25, 43: buckle

30: sleeve

31: Inside

32: bottom ring

33: Groove

34: Outside

41: Compression spring

42: baffle

44: Cap

46: fixed ring

47: Magnet

48: Through hole

50: Bead

51: Drop

52: hole

53: Groove

Claims (10)

A clutch with fixed depth, including: A set of beads (50); A cylindrical column (11) forms a set of drop portions (51) and a set of raised portions (54) along the circumferential direction, and the raised portion (54) separates two adjacent drop portions (51); A cylindrical shaft (20) has a circular groove (21), the wall of the cylindrical shaft (20) enclosing the circular groove (21) penetrates a group of holes (52), when the circular groove (21) receives the cylinder (11), The cylindrical shaft (20) and the cylinder (11) rotate mutually, and the total depth of the hole (52) and the drop portion (51) is equal to or greater than the diameter of the bead (50); The inner side (31) of a sleeve (30) sinks into a ring of grooves (53). When the sleeve (30) is sleeved on the cylindrical shaft (20), a sliding sleeve (40) is formed along the sliding sleeve (40) The axial direction moves linearly, the cylindrical shaft (20) externally closes the notch of the groove (53), and the inner side (31) of the sleeve (30) seals the bead (50) in the hole (52) and the drop part ( 51), allow the bulge (54) to push the bead (50) to drive the cylinder shaft (20) to rotate in the same direction with the cylinder (11); when the groove (53) faces the hole (52) in response to the displacement of the sleeve (30) ), the bead (50) leaving the drop part (51) can fall into the groove (53) through the hole (52), so that the cylinder (11) is idling in the circular groove (21) and does not work. The depth-fixable clutch according to claim 1, wherein the sliding sleeve (40) has a compression spring (41), and the compression spring (41) provides the cylindrical shaft (20) and the sleeve (30) mutually The force required for movement. The depth-fixable clutch according to claim 2, wherein one end of the compression spring (41) contacts a bottom ring (32) of the sleeve (30), and the other end pushes the cylindrical shaft (20) to be blocked by the sleeve (30) One of the baffles (42). The depth-fixable clutch according to claim 2, wherein one end of the compression spring (41) contacts a buckle (74) of the sleeve (30), and the other end is against a shoulder (26) of the cylindrical shaft (20) ), the compression spring (41) pushes the barrel shaft (20) to be blocked by an upper ring (37) of the sleeve (30). The depth-fixable clutch according to claim 1, wherein the drop portion (51) is a closed cavity. The depth-fixable clutch according to claim 1, wherein the drop portion (51) is a semi-closed cavity (15), so that the cylinder (11) is provided with a set of straight teeth (16) used as a bulge. The depth-fixable clutch according to claim 1, wherein the cylindrical shaft (20) also has an angular groove (23) for receiving a driver bit (60). The depth-fixable clutch according to claim 1, wherein the sleeve (30) has a magnet (47), and the magnet (47) is fixed on the screwdriver head by a cap (44) or a plug body (71) (60) The part where it enters and exits the sleeve (30). The depth-fixable clutch according to claim 8, wherein a non-slip surface (36, 49) is provided on the outer side (34) of the cap (44) or the sleeve (30). The depth-fixable clutch according to claim 1, wherein the cylinder (11) extends outward in the axial direction by a section of corner post (13).

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