TWI541108B - A torque adjusting device and a tool having the torque adjusting device - Google Patents

Description

Torque adjusting device and a tool having the same

The present invention relates to a torque adjustment technique for a tool.

Known tools such as torque wrenches, torque drivers. The torque value of some tools is usually controlled by a torque adjustment device. Selecting the appropriate torque value can be used to drive a fastener (such as a bolt or a nut) in the same direction to perform a loosening or locking operation. If it exceeds the preset range, the torque adjustment device will trip, so that the tool can not drive the fastener to continue to rotate, to avoid the damage caused by the collapse of the tooth, resulting in invalid disassembly.

There are many types of conventional torque adjustment devices. A torque adjusting device is composed of a knob and a control ring. The outer wall of the knob is arranged in a ring of racks, and the inner wall of the control ring also has a ring of racks. The length direction of the racks is substantially parallel with the axis of the control ring, and meshes with each other and limits. The knob must not be rotated. When the knob is pulled out and pulled out of the meshing range of the rack, the torque value of the tool can be adjusted rotationally. The knob is pressed into the control ring again so that the torque value cannot be changed arbitrarily.

The knob is mounted with a bead body, and the bead body is elastically biased to the top of the knob. During the press-in of the knob, the control ring presses the beads and forms a certain resistance to the knob. During the pull-out of the knob, the bead loses the limitation of the control loop, and it is easy to pop out of the knob, and even disappears, which has a great influence on the adjustment of the torque.

In order to solve this problem, the inventor of this case applied for the patent right of Taiwan's M371616 "Improvement of Wrench Torque Value Adjustment Mechanism", which is well documented.

However, the inventor of this case is not complacent and upholds the spirit of excellence. In the continuous development of tool-related construction, a new torque adjustment device was finally invented.

The main object of the present invention is to provide a cassette structure, replace the old torque adjustment device with a new mode, and change the habit of pulling out and pressing in, making the torque adjustment operation easier and more convenient.

For the above purposes, the torque adjustment device provided by the present invention comprises a sleeve, a main body, an operating rod and a cassette unit. Wherein, the sleeve has a plurality of internal teeth which are arranged on the inner wall of the sleeve. The main body is partially inserted into the sleeve, and the main body has a convex portion and at least one concave portion. The concave portion is recessed into the main body facing the inner tooth, and the convex portion is exposed to the sleeve, and a center is formed with a straight hole, and the straight hole communicates with the concave portion. The operating rod is partially inserted into the straight hole of the convex portion, and the operating rod pivotally connects the convex portion and forms a receiving portion at the facing concave portion.

The cassette unit includes at least one cassette block, at least one shell and an elastic member. The latching block is placed in a recess of the body, the latching block pivoting the body and forming at least one external tooth at the internal teeth facing the sleeve. The housing can be inserted into the receiving portion of the operating lever to cover one end of the elastic member. The elastic member is inserted into the receiving portion of the operating rod at the other end, and the elastic member pushes the shell to touch the corresponding portion of the latching block.

When the operating lever is moved relative to the main body to a restricted position, the latching block is pushed by the housing such that the external teeth engage the corresponding internal teeth of the sleeve so that the body does not rotate relative to the sleeve. When the operating lever is moved relative to the main body to a free position, the latching block is pushed by the housing so that the external teeth are away from the internal teeth of the sleeve, and the main body is free to rotate relative to the sleeve.

A tool includes an operating head, a grip, a torque structure and the torque adjustment device. The torque structure comprises: a handle, an arm, a transmission rod, a follower, a compression spring and a wheel seat. Wherein, the handle is connected with the grip, and the inside is hollow, and the transmission rod is installed in the handle and can rotate and rotate. The arm is integrated with the operating head, which is inserted into the handle and both are maintained Pivot relationship. The follower is inserted into the handle and is screwed to the transmission rod to reciprocate relative to the handle. The compression spring is placed in the handle, one end of which is opposite to the driven member, and the other end is placed against the wheel base to support the position where the wheel seat contacts the arm and penetrates the handle.

In the above torque adjusting device, the sleeve is placed in the grip and coupled with the handle to connect the transmission rod with the main body and to rotate in the same direction.

When the operating rod is moved relative to the main body to the restricted position, the grip is held in contact with the sleeve and the sleeve, and the main body restraining transmission rod is not allowed to displace the driven member under the condition that the clamping block engages the sleeve.

When the operating lever is moved relative to the main body to the free position, the latching block is no longer blocked by the sleeve, so that the driven member is driven by the main body to be reciprocally displaced relative to the shank.

In this way, when the operating lever is coupled with a button, the button is swayed like a seesaw, and the operating lever is controlled to swing back and forth to obtain a torque adjustment function. Alternatively, the operating lever is connected to a push button, and the push button is slid back and forth, and the operating lever can also be adjusted to adjust the torque value. Whether it is a swing or slide mode, it can replace the old use of pull-out, press-in, etc., making torque adjustment easier and more convenient.

The above-mentioned objects, structures, and functions of the present invention will be described with reference to the detailed description of the embodiments.

100‧‧‧ wrench

101‧‧‧Torque adjusting device

102‧‧‧ Torque structure

10‧‧‧Operating head

11‧‧‧ Sockets

20‧‧ ‧ handle

21, 29‧‧‧ lenses

22‧‧‧ fine-tuning scale ring

24‧‧‧ figures

26‧‧‧ external teeth

28‧‧‧Scale indicator

30‧‧‧ Arm

32‧‧‧ wheel seat

35‧‧‧ Followers

34‧‧‧Transmission rod

36‧‧‧Compression spring

38‧‧‧ bearing

40‧‧‧ grip

41‧‧‧ Inside hole

42, 49‧‧‧ window

43‧‧‧ Large diameter section

44‧‧‧ sleeve

45‧‧‧Small diameter section

46‧‧‧ internal teeth

47‧‧‧ screw holes

48‧‧‧through holes

50‧‧‧ Subject

51‧‧‧ Groove

52‧‧‧ convex

53‧‧‧ recess

54‧‧‧Flange

55‧‧‧through hole

56‧‧‧ screw holes

57‧‧‧ Combination slot

58‧‧‧ Straight hole

59‧‧‧ pivot hole

60‧‧‧Operator

61‧‧‧ pivot hole

62‧‧‧ accommodating department

63‧‧‧ shell

64‧‧‧Flexible parts

65‧‧‧ card block

66‧‧‧ external teeth

67‧‧‧ pivot

68‧‧‧ pivot

70‧‧‧ knob

71‧‧‧ outer trough

72‧‧‧ button

73‧‧‧Combination hole

74‧‧‧ screws

75‧‧‧ inner cabin

76‧‧‧ internal teeth

78‧‧‧ center hole

80‧‧‧ push button

82‧‧‧ accommodating slots

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a combination of a preferred embodiment of the tool of the present invention.

Figure 2 is a combined cross-sectional view of the tool of Figure 1.

Fig. 3 is a partially enlarged view of the torque adjusting device of Fig. 2;

Fig. 4 is an exploded perspective view of the torque adjusting device.

Figure 5 is a cross-sectional view of the sleeve.

Figures 6 and 7 are a cross-sectional view and a side view of the main body.

Figure 8 is a cross-sectional view of the knob.

Figure 9 is a perspective view of the fine adjustment scale ring.

Figures 10 and 12 are schematic views of the continuous operation of the torque adjustment device.

Figures 11 and 13 are internal schematic views of the torque adjusting device of Figures 10 and 12 after being cut away.

Figures 14 and 15 are schematic views of the continuous operation of the second embodiment of the torque adjusting device.

Fig. 16 is a plan view taken along line A-A of Fig. 14.

Please refer to Figures 1 and 2 for a preferred embodiment of the tool. In the present embodiment, the tool is a wrench 100 including an operating head 10, a grip 40, a torque adjustment device 101 and a torque structure 102. In some embodiments, the tool refers to a torque screwdriver.

Below the operating head 10 there is a set of joints 11 for directly or indirectly joining fasteners such as bolts or nuts.

The grip 40 has two windows 42, 49, each of which is inlaid with a generally compliant lens 21, 29 for seeing the underside of the lenses 21, 29. One of the lenses 21 plans a scale of two different units, and cooperates with a moving scale indicator 28 below the lens 21 to facilitate the interpretation of the torque value. The units of scale referred to here are, for example, the British unit lb-ft (pound-呎) and the metric unit N-m (Newton-meter). Of course, the kg-m (kg-meter) unit system is also within the allowable range.

The force of the wrench 100 is transmitted to the socket portion 11 of the operating head 10 through the torque structure 102. The torque structure 102 is composed of a handle 20, an arm 30, a transmission rod 34, a follower 35, a compression spring 36 and a wheel base 32. The components are summarized as follows:

The handle 20 is connected to the grip 40, and a bearing 38 is hollowed inside and fixed for the drive rod 34 to be mounted in the handle 20 through the bearing 38 for self-rotation. The arm 30 is integrally formed with the operating head 10, and the follower 35 is inserted into the handle 20, and the two maintain a pivotal relationship. The follower 35 is inserted into the handle 20, and the follower 35 is not only screwed to the transmission rod 34, but also connected to the aforementioned scale indicator member 28, without being stalked 20 Under the limited condition, the follower 35 reciprocates relative to the shank 20, and the scale indicator member 28 is actuated in synchronization. The compression spring 36 is placed in the shank 20, and one end thereof abuts against the follower 35, and the other end bears against the wheel base 32, and the support wheel base 32 touches the portion where the arm 30 penetrates the shank 20.

Regarding the specific configuration of the arm 30, the wheel base 32 and the compression spring 36, even the coupling relationship and the efficiency of each other are substantially the same as those of the patents of Taiwan No. I300740 and U.S. Patent No. 7,182,006. These patents belong to the same inventor as this case and are not described here.

The torque adjustment device 101 is mounted in the grip 40 and is located behind the torque structure 102 to be coupled to a knob 70 to adjust the torque value of the wrench 100. In Figures 3 and 4, the torque adjusting device 101 is composed of a sleeve 44, a main body 50, an operating lever 60 and a latching unit, and the detailed structure and coupling relationship of each component are described in detail later.

First, as seen in Fig. 5, the center of the sleeve 44 is an inner hole 41 which divides the large and small diameter sections 43, 45 by diameter. A screw hole 47 penetrates the wall of the large diameter section 43 and forms a through hole 48 in the wall of the small diameter section 43. In addition, a plurality of internal teeth 46 are looped in the wall surface of the bore 41 in the sleeve 44, and these internal teeth 46 are adjacent to the opening of the sleeve 44.

As shown in FIGS. 6 and 7, the main body 50 has a groove 51 formed at one end and a convex portion 52 at the other end. Around the body 50 are recessed into two recesses 53, which are oppositely open, immediately adjacent one side of the flange 54 of the body 50. In some embodiments, there is only one recess 53 around the body 50, which is also within the allowable range.

In addition, the main body 50 has a through hole 55 between the two recesses 53 and is connected with a straight hole 58 extending through the center of the convex portion 52, so that the through hole 55 is located at the junction of the concave portion 53 and the straight hole 58, forming a three-way pipe. . The main body 50 further has a screw hole 56 and a plurality of coupling grooves 57 which are formed in the radial direction on the wall of the groove 51. The coupling grooves 57 are distributed on the other side of the flange 54 and surround the convex portion 52.

Referring back to Figures 3 and 4, the operating lever 60 has a pivot hole 61 and a receiving portion 62. In the present embodiment, the accommodating portion 62 refers to a hole penetrating through the operating lever 60 (as shown in Figs. 11, 13). In some embodiments, the receiving portion 62 is a groove that sinks into the operating rod 60, also within the allowable range.

The latch unit includes a second latching block 65, a second housing 63 and an elastic member 64. Each of the housings 63 is shaped like a hollow cartridge, and the resilient member 64 is a compression spring. These latching blocks 65 are substantially identical in shape, with each of the latching blocks 65 forming one or more external teeth 66.

Next, as seen in Fig. 8, the knob 70 is inserted into an outer slot 71 at one end and an inner compartment 75 at the other end. A central hole 78 and a plurality of coupling holes 73 distributed around the center hole 78 are formed in the middle portion of the knob 70, allowing the outer groove 71 and the inner casing 75 to communicate with each other through the holes 73, 78. The knob 70 also has an array of internal teeth 76 that are continuously looped around the wall of the inner compartment 75.

The assembled structure of the torque adjusting device 101 is seen from the third to ninth views. It is understood that the main body 50 is partially inserted into the sleeve 44, and the flange 54 limits the depth at which the main body 50 is inserted into the sleeve 44, so that the convex portion 52 is exposed outside the sleeve 44. The operating rod 60 is partially inserted into the straight hole 58 of the convex portion 52, and the pivoting hole 59 formed in the convex portion 52 is passed through a pivot 67 to pivot the operating rod 60 to the convex portion 52 so that the receiving portion 62 is located in the through hole 55. And facing the recess 53.

The two latching blocks 65 are placed in the corresponding recesses 53 of the main body 50. Therein, each of the latching blocks 65 is juxtaposed on the side of the flange 54 and is passed by a pivot 68. The latch block 65 maintains a pivotal relationship with the body 50 such that the outer teeth 66 face the inner teeth 46 of the sleeve 44. The two shells 63 cover the two ends of the elastic member 64, and are inserted into the receiving portion 62 of the operating rod 60 in a compressed state of the elastic member 64. Under the pushing of the elastic member 64, each of the shells 63 partially exposes the receiving portion 62 of the operating rod 60. Thereby, the corresponding portion of the latch block 65 is contacted.

The inner compartment 75 of the knob 70 receives the flange 54 allowing the projection 52 to simultaneously pass through the central aperture 78 of the knob 70. The coupling holes 73 of the knob 70 are aligned with the coupling grooves 57 of the main body 50 and are joined together by fasteners such as screws 74. A button 72 is inserted into the outer groove 71 of the knob 70 and locked with the operating lever 60 to expose the convex portion 52.

In the torque adjusting device 101, the sleeve 44 is inserted into the grip 40 to cover the handle 20 and the transmission rod 34, and the transmission rod 34 is inserted into the recess 51 of the main body 50 beyond the bearing 38. Multiple One of the fasteners, such as a countersunk screw, is locked with the shank 20 through the threaded bore 47 of the sleeve 44. The other fastener passes through the through hole 48 of the sleeve 44 and locks into the threaded hole 56 of the body 50. The drive rod 34 enters the portion of the recess 51 such that the body 50 is coupled to the drive rod 34 and is rotatable in the same direction.

At this point, the internal teeth 76 of the knob 70 surround a periphery of a fine adjustment scale ring 22. The outer circumference of the fine adjustment ring 22 has a plurality of numbers 24 and a plurality of external teeth 26 (as shown in FIG. 9). These external teeth 26 and the number 24 are not on the same side of the fine adjustment ring 22, allowing the external teeth 26 to engage the inside of the knob 70. Teeth 76. Because the knob 70 is coupled to the transmission rod 34 by the main body 50, the transmission rod 34 is blocked from being unable to move outwardly of the bearing 38, so the knob 70 must not be pulled out. In addition, the flange 54 of the main body 50 is blocked by the bearing 38, so that the knob 70 must not be internally pressed, and only the fine adjustment scale ring 22 can be rotated in the forward and reverse clock directions.

In use, the upper end of the button 72 is adjacent to the flange 54 to urge the operating lever 60 to yaw downwardly below the sleeve 44 like the dashed line of FIG. 10, referred to as a restricted position. When the operating lever 60 is moved relative to the main body 50 to the restricted position, the latching block 65 is pushed by the housing 63 such that the external teeth 66 engage the corresponding internal teeth 46 of the sleeve 44 such that the body 50 must not rotate relative to the sleeve 44, as shown in FIG. . At this point, the knob must not be rotated.

The lower end of the button 72 is adjacent to the flange 54 to urge the operating lever 60 to yaw above the sleeve 44 like the dashed line of Fig. 12, referred to as a free position. When the operating lever 60 is moved relative to the main body 50 to the free position, the latching block 65 is pushed by the housing 63 such that the outer teeth 66 are away from the inner teeth 46 of the sleeve 44, and the body 50 is free to rotate relative to the sleeve 44, as shown in FIG.

Next, adjust the torque to further explain. As shown in FIGS. 2 to 4, the knob 70 rotates the transmission rod 34 via the main body 50 to drive the follower 35 to press or release the compression spring 36, thereby changing the function of the wheel base 32 to the operation head 10 via the arm 30. The force relatively affects the magnitude of the torque applied by the socket portion 11, and the value of the change in the torque is interpreted by the scale indicator 28. At the same time, the fine adjustment scale ring 22 acts synchronously with the knob 70 to act as auxiliary data for the torque value interpretation.

Finally, a second embodiment of the torque adjusting device is shown, which is substantially the same as the first embodiment, except that the straight hole 58 of the main body 50 is polygonal and has a large volume. The volume of the corresponding portion of the operating lever 60. Moreover, the wall portion of the convex portion 52 forms two elongated holes 90, each of which replaces the original pivot hole and accommodates a stud 92 which is raised around the operating rod 60. The stud 92 is a polygonal design having a volume smaller than the volume of the elongated hole 90.

Secondly, a push button 80 replaces the original button and acts as a switch for the torque adjustment device. The push button 80 forms a receiving groove 82 facing the torque adjusting device for connecting the portion of the operating lever 60 beyond the convex portion 52 of the main body 50. Therefore, the push button 80 is mounted on the outer groove 71 of the knob 70 to drive the operating lever 60 to slide up and down.

The push button 80 slides down to the limit position, and the associated operating lever 60 is moved relative to the sleeve 44 to the dotted line of Fig. 14. The push button 80 is moved up to the free position, and the operating lever 60 is moved to the dotted line of Fig. 15.

In the above, it is only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the numerical values are changed or the equivalent elements are replaced, or the equivalent range of the patent application scope of the present invention is changed. And modifications should still fall within the scope of the invention patent.

22‧‧‧ fine-tuning scale ring

34‧‧‧Transmission rod

40‧‧‧ grip

44‧‧‧ sleeve

46‧‧‧ internal teeth

50‧‧‧ Subject

60‧‧‧Operator

61‧‧‧ pivot hole

62‧‧‧ accommodating department

63‧‧‧ shell

64‧‧‧Flexible parts

65‧‧‧ card block

66‧‧‧ external teeth

67‧‧‧ pivot

68‧‧‧ pivot

70‧‧‧ knob

72‧‧‧ button

74‧‧‧ screws

Claims (10)

A torque adjusting device (101) comprising: a sleeve (44) having a plurality of internal teeth (46), the internal teeth (46) being arranged on the inner wall of the sleeve (44); a body (50), It is partially inserted into the sleeve (44). The body (50) has a convex portion (52) and at least one concave portion (53). The concave portion (53) is immersed in the body (50) facing the internal tooth (46), the convex portion ( 52) exposed to the sleeve (44), the center of which forms a constant hole (58), the straight hole (58) communicates with the recess (53); and an operating rod (60) which is partially inserted into the straight hole of the convex portion (52) (58), the operating rod (60) is inserted into the convex portion (52) straight hole (58), which forms a receiving portion (62) facing the concave portion (53); a latching unit including at least one latching block (65) at least one shell (63) and an elastic member (64), the latching block (65) being placed in the recess (53) of the body (50) and pivotally connected to the body (50), the latching block (65) At least one external tooth (66) is formed at the inner tooth (46) facing the sleeve (44), and the shell (63) enters and exits the receiving portion (62) of the operating rod (60) to cover the elastic member (64). The end portion, the elastic member (64) is inserted into the receiving portion (62) of the operating rod (60), and the pushing shell (63) touches the corresponding portion of the latching block (65); when the operating rod (60) is opposite to the main body (50) When moving to a restricted position, the card block (65) being pushed by the casing (63) such that the external teeth (66) engage the corresponding internal teeth (46) of the sleeve (44) such that the body (50) must not rotate relative to the sleeve (44); when the operating rod (60) When the relative body (50) is moved to a free position, the latching block (65) is pushed by the shell (63) to move the outer teeth (66) away from the inner teeth (46) of the sleeve (44), and the main body (50) is oppositely sleeved. The cylinder (44) is free to rotate. The torque adjusting device (101) of claim 1, wherein the operating lever (60) and the convex portion (52) are coupled together by a pivot (67), allowing the operating lever (60) to be in the main body (50) The straight hole (58) swings back and forth. The torque adjustment device (101) of claim 1, wherein the convex portion (52) has two narrow holes (90) formed in the wall surface, and each of the elongated holes (90) accommodates a ridge on the operating rod (60). The stud (92), the stud (92) is smaller in volume than the elongate hole (90), allowing the operating rod (60) to reciprocate in the straight hole (58) of the body (50). The torque adjustment device (101) of claim 1, wherein the body (50) has a through hole (55) at a intersection of the recess (53) and the straight hole (58). There is no effect on the synchronous movement of the operating lever (60) with the cassette unit. A tool (100) comprising an operating head (10), a grip (40), a torque structure (102) and a torque adjustment device (101) as claimed in claim 1; the torque structure (102) comprises a handle (20), an arm (30), a transmission rod (34), a follower (35), a compression spring (36) and a wheel base (32), the handle (20) and the grip ( 40) connected, the interior is hollow, and the transmission rod (34) is mounted in the handle (20) to be rotatable; the arm (30) is integrated with the operating head (10), and the arm (30) is inserted into the handle (20) The two maintain a pivotal relationship; the follower (35) is placed in the handle (20), which maintains a screwing relationship with the transmission rod (34), and can reciprocate relative to the handle (20); the compression spring (36) is placed The handle (20) has one end opposite to the follower (35) and the other end against the wheel base (32), the support wheel base (32) contacting the arm (30) deep into the handle (20); the torque adjustment In the device (101), the sleeve (44) is inserted into the grip (40) and combined with the handle (20), the main body (50) is connected to the transmission rod (34) and can rotate in the same direction; when the operating rod (60) When the relative body (50) is moved to the restricted position, the grip (40) is held together with the sleeve (20) and the sleeve (44), and is engaged in the latching block (65). Under the condition of the sleeve (44), the main body (50) restricts the transmission rod (34) from driving the follower (35); when the operating rod (60) is moved to the free position relative to the main body (50), the clamping block ( 65) No Then blocked by the sleeve (44), so that the follower (35) is driven by the body (50) to reciprocate relative to the handle (20) to squeeze or release the compression spring (36), changing the wheel base (32) via the arm ( 30) The force transmitted to the operating head (10) relatively affects the torque of the operating head (10). The tool of claim 5, further comprising a knob (70) having an outer slot (71) and an inner compartment (75), the outer slot (71) and the inner compartment (75) being located Both ends of the knob (70) are communicated with each other through a central hole (78) formed in the knob (70); a flange (54) is formed around the body (50), and the flange (54) is placed in the inner compartment ( 75) In combination with the knob (70), the convex portion (52) of the main body (50) reaches the outer groove (71) through the center hole (78) of the knob (70). The tool of claim 6, further comprising a fine adjustment ring (22) disposed on the grip (40), the outer circumference of the fine adjustment ring (22) forming a plurality of numbers (24) and a plurality of external teeth ( 26) These external teeth (26) are in meshing relationship with a row of internal teeth (76) formed in the inner compartment (75) of the knob (70). The tool of claim 6, wherein the torque adjusting device (101) further has a switch connected to the operating lever (60) for actuating in the outer slot (71) of the knob (70). The tool of claim 8, wherein the switch can be a button (72) or a push (80). The tool of claim 5, wherein the body (50) has a through hole (55) located at a intersection of the recess (53) and the straight hole (58), and the operating lever (60) Synchronous movement with the shell (63) has no effect.