TWI623391B - Torque adjusting device - Google Patents

Abstract

A torque adjusting device includes: a main body, a latching member and an operating lever. The body has a straight hole and a through hole, and the straight hole and the through hole communicate with each other. The operating rod penetrates the inside of the main body through a straight hole, and the two maintain a pivotal relationship. The latch member enters the body through the through hole and maintains a rotatable coupling relationship with the deep end of the operating rod. When the torque adjusting device is combined with a torque tool, the latch member can be driven to move linearly by the operating rod under the restriction of the through hole, and move back and forth relative to the main body in the retracted and extended positions to determine whether the torque tool can execute the torque value. Adjustment work.

Description

Torque adjusting device

This invention relates to the field of adjustment of torque tools, and more particularly to a device suitable for tool torque value adjustment.

The general torque tool is mostly a torque wrench and a torque screwdriver. Whether it is a torque wrench or a torque driver, a torque adjustment device is usually provided to adjust the torque value of the tool.

A wide range 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 to the axis of the control ring, and can be meshed with each other. The limit 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 that is pushed by an elastic member to the outside of the knob. During the press-in of the knob, the control ring compresses the beads and creates resistance to the knob. During the pull-out of the knob, the bead loses the limitation of the control loop, is easy to pop out, and even disappears, which has a great influence on the adjustment of the torque.

In order to improve the adjustment device of the torque tool, the inventor of the present case successively obtained the patent rights of Taiwan No. M371616 and No. I541108, and the case is well documented.

However, the inventor of this case is not complacent, and inherits the scientific essence of excellence. God, finally developed a new torque adjustment device. The main purpose of the invention is to adopt the linear motion card structure to achieve the same clutch effect with fewer zero (group) parts, which can save production cost and enhance market competitiveness.

As a result of the above object, the torque adjusting device of the present invention comprises: a main body having a straight hole and a through hole, the straight hole extending along the axial direction of the main body, the through hole following the radial direction of the main body Extending to communicate with the straight hole; a latch member having a plurality of teeth formed on the outer surface thereof, the latch member being disposed in the through hole, the opposite body being linearly movable in a retracted position and an extended position; and an operating lever It has a deep end, the operating rod is connected to the main body and can reciprocate in a circumferential direction, and the deep end maintains a rotatable coupling relationship with the latching member through the straight hole.

In the retracted position, the deep end of the operating rod moves to a low orientation along the circular motion, restricting the latching member from retreating into the through hole along the radial direction of the body, and relatively reducing the height of each tooth at the main body.

In the extended position, the deep end of the operating rod moves to a higher orientation along the circular motion, restricting the latching member from extending through the through hole in the radial direction of the body, and relatively increasing the height of each tooth at the main body.

In this way, the torque adjusting device of the present invention combines a torque tool to linearly move inside the main body with a single latch member under the restriction of the through hole, thereby determining whether the torque value of the tool can be adjusted. Even if the number is smaller than that of the above-mentioned No. I541108 patent, the same clutch effect can be obtained, which not only saves the manufacturing cost of the torque adjustment device, but also enhances the market competitiveness of the tool sales.

The above described objects, features, features and advantages of the present invention will become more apparent and understood.

10‧‧‧ Subject

11‧‧‧ Straight hole

12‧‧‧through hole

121‧‧‧Installation reserved hole

13‧‧‧ convex

14‧‧‧ Tube

15‧‧‧ Body Department

16‧‧‧flat section

17‧‧‧ pivot

18‧‧‧ pole

19‧‧‧Forcing holes

20‧‧‧ Cards

21‧‧‧ teeth

22‧‧‧ Activity hole

30‧‧‧Operator

31‧‧‧Deep end

32‧‧‧Exposed end

33‧‧‧ convex surface

40‧‧‧ beads

42‧‧‧Flexible parts

44‧‧‧ screws

46‧‧‧Bolts

50‧‧‧ knob

51‧‧‧ outer trough

52‧‧‧Inside cabin

53‧‧‧ Ring Department

54‧‧‧First meshing section

55‧‧‧through holes

56‧‧‧ button

57‧‧‧Combination hole

60‧‧‧torque wrench

61‧‧‧ grip

62‧‧‧Transmission rod

63‧‧‧ sleeve

64‧‧‧ internal teeth

65‧‧‧Scale ring

66‧‧‧ external teeth

67‧‧‧ Identification Department

68‧‧‧ window

69‧‧‧ lenses

70‧‧‧forced parts

71‧‧‧ Bearing

Fig. 1 is an exploded view of the torque adjusting device of the present invention disposed on a tool.

Figure 2 is a plan view of the main body.

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2;

Figure 4 is an exploded view of the knob corresponding to the scale ring.

Figure 5 is a cross-sectional view of the tool combination torque adjusting device.

Fig. 6 is a cross-sectional view taken along line B-B of Fig. 5.

Fig. 7 is a cross-sectional view taken along line C-C of Fig. 5.

Figure 8 is a reference diagram of the use of the torque adjustment device in the tool.

Fig. 9 is a cross-sectional view taken along line D-D of Fig. 8.

Figures 1, 4, and 5 are a preferred embodiment of the present invention for drawing a partial construction of a tool that transmits a torque value to a fastener such as a screw or nut. In the present embodiment, the tool refers to a torque wrench 60. In some embodiments, the tool can be a torsion driver (not shown).

Specifically, the torque wrench 60 has a hollow grip 61. The grip 61 is internally provided with a transmission rod 62, a sleeve 63 and a scale ring 65. The transmission rod 62 is blocked by a bearing 71 mounted in the grip 61, and is not easily separated from the grip 61, and can perform the rotation motion inside the grip 61. The sleeve 63 has a plurality of continuous internal teeth 64 that are supported by the sleeve 63 to surround the periphery of the transmission rod 62 when the sleeve 63 is disposed within the grip 61 and is stationary. The sleeve 63 is inserted into the scale ring 65 to support the rotation of the scale ring 65 relative to a window 68 formed in the grip 61. A lens 69 is embedded in the window 68 of the grip 61, which provides an enlarged function to the scale ring 65. The scale ring 65 has an outer row of teeth 66 and a plurality of identification portions 67. These external teeth 66 are swelled in the circumferential direction on the outer surface of the scale ring 65, and are continuously aligned with each other. These identification portions 67 are formed on the outer circumferential surface of the scale ring 65. Each of the identification portions 67 is an Arabic numeral and comes to the lower side of the lens 69 as the scale ring 65 rotates, contributing to the interpretation of the torque value of the torque wrench 60.

Because the structure of the torque wrench 60 is substantially the same as the aforementioned patent No. I541108 In case of interest, please read the specification of the patent case, so this case will not be repeated.

It is not difficult to understand from the first to fifth figures that the torque wrench 60 is combined with a torque adjusting device, and the torque adjusting device is used to adjust the magnitude of the torque value. In the present embodiment, the torque adjusting device comprises a main body 10, a latching member 20, an operating lever 30, a bead body 40, an elastic member 42, a knob 50 and a button 56.

In the figure, the main body 10 has two ends, and its two ends are passed through the through hole 11. The body 10 is hollow and has a through hole 12 that passes vertically through the straight hole 11. In short, the straight holes 11 extend in the axial direction of the main body 10, and are staggered in the through holes 12 extending in the diameter direction of the main body 10. Therefore, the straight hole 11 and the through hole 12 communicate with each other.

Viewed from the outer contour, the two ends of the main body 10 are divided into a convex portion 13, a cylindrical portion 14, a disk portion 15, and a flat portion 16. The convex portion 13 and the tubular portion 14 are respectively at both ends of the main body 10, and the two are joined together by the disk portion 15 and the flat portion 16. The flat portion 16 is between the tubular portion 14 and the disk portion 15, and the flat portion 16 and the convex portion 13 are located on both sides of the disk portion 15. The thickness of the flat portion 16 is smaller than the maximum diameter of the convex portion 13 or the tubular portion 14, allowing the through hole 12 to penetrate the intermediate portion of the flat portion 16. The second mounting reserved holes 121 surround the walls of the through holes 12 through the flat portion 16 facing each other, and each of the mounting reserved holes 121 is connected to the through holes 12.

The latching member 20 has a plurality of teeth 21 and a movable hole 22. These teeth 21 are continuously formed on the outer surface of the latch member 20, and generally refer to the top surface of the latch member 20. The movable hole 22 is inserted through the intermediate portion of the latching member 20, and the movable hole 22 is opposed to the straight hole 11 of the main body 10 during the insertion of the latching member 20 into the through hole 12. At this point, the latch member 20 is constrained by the flat portion 16 surrounding the wall of the through hole 12, and is linearly movable in a retracted position and an extended position along the diametrical direction of the main body 10. In other words, the latch member 20 is in a linear reciprocating motion with respect to the main body 10.

The operating lever 30 has a deep end 31 and an exposed end 32, and a convex curved surface 33 serves as an end surface of the deep end 31. When the operating rod 30 is placed in the straight hole 11 of the main body 10, the deep end 31 passes through the straight hole 11 comes into the through hole 12 to enter the movable hole 22 of the latch member 20.

At this point, a pivot 17 passes through the intermediate portion of the projection 13 and the operating lever 30 to support the exposed end 32 beyond the projection 13. The operating lever 30 is coupled to the main body 10 by a pivot 17, so that the operating lever 30 swings back and forth inside the main body 10 like a pendulum. In addition, a rod 18 is passed through the mounting hole 121 of the flat portion 16 until the latching member 20 and the deep end 31 of the operating lever 30 are maintained in a rotatable coupling relationship by the strut 18.

Since the length of the strut 18 (see FIG. 7) is smaller than the distance between the short side walls of the through hole 12, the deep end 31 of the operating rod 30 reciprocates around the pivot 17 in the circumferential direction without being subjected to the main body 10 or flat. The influence or interference of the part 16.

The knob 50 has an uneven surface, which not only enlarges the contact area, but also facilitates the operation of gripping and twisting. The knob 50 is hollow inside, and is defined by a ring portion 53 to partition the internal space of the knob 50 into an outer groove 51 and an inner casing 52. The outer groove 51 communicates with the inner casing 52 through the hollow ring portion 53. The knob 50 further has a first engaging portion 54 and a plurality of through holes 55. The first engaging portion 54 is a plurality of continuous teeth that bulge around the inner circumferential surface of the wall of the inner compartment 52 of the knob 50. These through holes 55 are formed in the ring portion 53, allowing at least one screw 44 to be locked to the disk portion 15 through the corresponding through hole 55, so that the knob 50 and the body 10 are joined together.

The button 56 has a coupling hole 57. When the button 56 is placed in the outer slot 51 of the knob 50, a bolt 46 is locked to the exposed end 32 of the operating lever 30 through the coupling hole 57, so that the button 56 is coupled with the operating lever 30, allowing the button 56 to switch with respect to the knob 50. .

Next, the specific configuration of the torque adjusting device in combination with the torque wrench 60 will be described in detail in conjunction with FIGS. 5-7.

The main body 10 is placed in the grip 61 until the disc portion 15 is blocked by the sleeve 63, so that the tubular portion 14 can cover the partial transmission rod 62. A pressing member 70 is inserted into the driving rod 62 through a pressing hole 19 formed in the tubular portion 14, so that the main body 10 is connected to the transmission rod 62 and is not easily detached. Turn.

Secondly, the beads 40 press the elastic members 42 together into the end of the transmission rod 62. In the present embodiment, the elastic member 42 is a compression spring, one end of which abuts against the transmission rod 62, and the other end pushes the bead body 40 to touch the deep end 31 of the operation rod 30, so that the bead body 40 has a positioning effect on the operation rod 30. Since the center of the convex curved surface 33 is higher than the both ends, the bead body 40 contacts any low end of the convex curved surface 33, and generally exerts a counter force against the swing of the operating lever 30, thereby preventing the button 46 from changing the position without warning.

In the figure, the latch member 20 is in the extended position. The deep end 31 of the operating lever 30 moves to a higher orientation along the circular motion, except that the button 56 moves downwardly of the drawing while simultaneously restricting (or pushing) the latching member 20 to extend radially along the body 10. The aperture 12, relative to the height of each tooth 21 at the body 10, causes the teeth 21 to engage or engage the corresponding internal teeth 64 of the sleeve 63.

At this point, the sleeve 63 is stationary so that neither the main body 10 nor the knob 50 can be rotated. Even if the torque wrench 60 is operated to perform a loosening or locking operation on the fastener, there is no need to worry that the knob 50 is accidentally touched, and the torque value naturally does not become arbitrarily large or reduced.

As seen from Figures 8 and 9, the latch member 20 is in the retracted position. The button 56 moves to the upper side of the drawing surface, and the deep end 31 of the associated operating lever 30 moves to a low orientation along the circular motion, and restricts (or pulls) the latching member 20 to retreat into the through hole 12 along the radial direction of the main body 10 (see Fig. 3), the height of each of the teeth 21 at the main body 10 is relatively lowered, and the engagement or engagement relationship between the teeth 21 and the internal teeth 64 is released.

In this way, the knob 50 is free, and the force is rotated relative to the grip 61 to drive the tubular portion 14 to rotate in the same direction via the disk portion 15, so that the torque value of the torque wrench 60 can be adjusted.

In addition, the scale ring 65 is partially inserted into the inner compartment 52 of the knob 50, and the outer teeth 66 bite the first engaging portion 54, so that the scale ring 65 is synchronized with the knob 50. By observing the identification portion 67 of the scale ring 65 through the lens 69 (see Fig. 4), the current torque value of the torque wrench 60 can be quickly interpreted, which is very simple and convenient.

Of course, the button 56 is moved downwardly of the drawing to switch the latch member 20 from the retracted position to the extended position so that the torque wrench 60 maintains a constant torque value.

Claims (6)

A torque adjusting device comprising: a main body having a straight hole and a through hole, the straight hole extending along an axial direction of the main body, the through hole extending in a radial direction of the main body and communicating with the straight hole; The outer surface of the piece is formed with a plurality of teeth, and the latching member is placed in the through hole, and the opposite body is linearly movable in a retracted position and an extended position; an operating rod having a deep end, the operating rod is connected to the main body Reciprocating in a circumferential direction, the deep end maintains a rotatable coupling relationship with the latch member through a straight hole; in the retracted position, the deep end of the lever moves to a low orientation along the circular motion to limit the latching member Retreating into the through hole along the radial direction of the main body, relatively reducing the height of each tooth at the main body; in the extended position, the deep end of the operating rod moves to a higher orientation along the circular motion, restricting the locking member along the main body diameter The through holes are extended to relatively increase the height of each tooth at the body. The torque adjusting device according to claim 1, wherein the straight hole extends in the axial direction and passes through the two ends of the main body, and the through hole vertically communicates with the straight hole through the intermediate portion of the main body. The torque adjusting device according to claim 2, wherein the main body has a convex portion and a cylindrical portion, and the two are connected by a disk portion and a flat portion, the flat portion being in the tubular portion and the disk portion. Between the portions, the through hole is penetrated, and the convex portion and the flat portion are on both sides of the disk portion; when the deep end enters the through hole of the flat portion, the operating rod passes through the disk portion so that the convex portion is sleeved outside the operating rod A pivot is connected together. The torque adjusting device of claim 3, wherein the latch member has a a movable hole; when the deep end of the operating rod enters the through hole of the flat portion, the deep end is inserted into the movable hole of the latching member, and a rod is inserted into the latching member and passes through the deep end, so that the operating rod is rotatably coupled to the card Inside the piece. The torque adjusting device of claim 3 or 4, further comprising: a bead body and an elastic member; a torque wrench comprising: a grip, which is hollow; and a transmission rod disposed in the grip Rotating inside; a sleeve having a plurality of continuous internal teeth, the sleeve being disposed in the grip and fixed, supporting the inner teeth to surround the periphery of the transmission rod; when the torque adjusting device is combined with the torque wrench, The main body is inserted into the grip until the disc body portion is blocked by the sleeve; the tubular portion is sleeved around the transmission rod, and the two are connected to rotate in the same direction; the elastic member has one end against the transmission rod, and the other end pushes the bead body to touch the operation The deep end of the rod has a positioning effect on the operating rod by the bead; in response to the locking member being in the retracted position, the tooth leaves the internal tooth of the sleeve, and when the clamping member comes to the extended position, the tooth engages the internal tooth, Prevent the main body from rotating in the same direction as the transmission rod. The torque adjusting device of claim 5, wherein a convex curved surface is formed at the deep end of the operating rod, allowing the bead body to touch the convex curved surface of the deep end.