TWI537103B - One-way ratchet wrench - Google Patents

Description

One-way ratchet wrench

The invention relates to a wrench structure; in particular to a one-way ratchet wrench.

According to the conventional one-way ratchet wrench, a sleeve is used to drive a screw or a screw or the like, and the structure is unidirectionally inserted through an inner ratchet and a latching block having an outer ratchet. When the screwing member pulls the one-way ratchet wrench for the center of rotation, one of the directions can drive the screw to rotate, and the other direction will idle, thereby eliminating the need for the user to repeatedly screw the sleeve with the screw. The separation and fitting of the pieces are easy to operate. However, the conventional one-way ratchet wrench has a backlash between the inner ratchet and the ratchet teeth, so that the one-way ratchet wrench has a rotation before the sleeve is officially driven to drive the screw. In addition to the empty stroke of the pendulum, there is also a gap between the four corner holes of the sleeve and the four-corner ratchet head, and the sleeve is used to join the hexagonal head of the screwing member such as a screw or a nut. The coupling hole has a gap with the hexagonal head when it is inserted. The combination of the above factors is increasing the idle stroke of the swing, and the one-way ratchet wrench is not suitable for use in a narrow space. Although there is a period of increase in the number of teeth of the inner ratchet and the outer ratchet to reduce the backlash, the inner ratchet with too many teeth and the ratchet outside the snap are not easy to manufacture, and the cost is increased. It is more likely that the strength of the structure derived from the tooth type is insufficient to cause collapse. Therefore, it is obviously not a practical choice to increase the number of teeth to reduce the backlash.

To this end, a one-way ratchet wrench that eliminates backlash is shipped. And the new patent case, such as China's certificate number No. M311540 "ratchet wrench structure with two kinds of torque output", is that the patented technology has a transmission rod and two ring gears, and the rotation of the transmission rod is driven by the handle to eliminate the teeth. The purpose of the gap, but the above-mentioned many components are particularly difficult to assemble, and the labor and time costs incurred are also increased.

In view of the above, an object of the present invention is to provide a one-way ratchet wrench which is reduced in assembly, which can improve assembly efficiency and reduce cost.

To achieve the above objective, the one-way ratchet wrench provided by the present invention comprises a body, a driving rod, a rotating body, at least one first clamping block, at least one second clamping block and a handle. The main body includes a receiving hole and a shaft hole, and the inner wall of the receiving hole is provided with a first inner ratchet; the driving rod is rotatably disposed in the shaft hole of the body, One end of the driving rod is provided with an annular tooth, and the other end of the driving rod is a driven portion with respect to the other end of the annular tooth; the rotating system is rotatably disposed in the receiving hole of the body, and the rotating body comprises a sleeve portion And a tooth portion, the sleeve portion has a coupling hole for inserting a transmission rod therein, the tooth portion is coupled to one end of the sleeve portion, and has a surface end ratchet meshing with the annular tooth of the driving rod; a latching block is disposed between the sleeve portion of the rotating body and the inner wall of the receiving hole, the first latching block includes a first outer ratchet meshing with the first inner ratchet; The sleeve is sleeved on the driving rod, and the handle comprises a sleeve, the inner wall of the sleeve is provided with a second inner ratchet; and the second latching block is disposed on the sleeve and the sleeve Between the drive rods, the second latch block includes a second outer ratchet meshing with the second inner ratchet

The effect of the invention is that the user removes the backlash of the first clamping block and the first internal ratchet by rotating the driving rod, and then pulls the one-way ratchet The wheel wrench can rotate a screw (such as a screw or a nut), which is called an angleless lock. Moreover, the number of components in the receiving hole is greatly reduced, so the present invention is more efficient in assembly and thereby reduces the cost of assembly.

100‧‧‧One-way ratchet wrench

10‧‧‧ Ontology

12‧‧‧ head

122‧‧‧ accommodating holes

122a‧‧‧first opening

122b‧‧‧second opening

14‧‧‧ handle

142‧‧‧Axis hole

142a‧‧‧ third opening

142b‧‧‧fourth opening

144‧‧‧Perforation

16‧‧‧First internal ratchet

18‧‧‧ latch

20‧‧‧ drive rod

22‧‧‧ ring teeth

24‧‧‧Departed Department

242‧‧‧ trench

26‧‧‧ring groove

30‧‧‧Rotating body

32‧‧‧Sleeve Department

322‧‧‧bond hole

324‧‧‧ slotting

326‧‧ ‧ chute

326a‧‧ ‧ facing

34‧‧‧ teeth

342‧‧‧face ratchet

40‧‧‧First card block

42‧‧‧First external ratchet

44‧‧‧First elastic element

50‧‧‧Second card block

52‧‧‧Second external ratchet

54‧‧‧Second elastic element

56‧‧‧ positioning beads

60‧‧‧Handle

62‧‧‧ casing

622‧‧‧Second internal ratchet

64‧‧‧Axis hole

70‧‧‧Drive rod

72‧‧‧ positioning groove

722‧‧‧Flexible parts

724‧‧‧ positioning beads

74‧‧‧Positioning holes

742‧‧ ‧ spring

76‧‧‧Locating pin

80‧‧‧shims

L1‧‧‧first axis

L2‧‧‧second axis

1 is a perspective view of a one-way ratchet wrench in accordance with a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of the one-way ratchet wrench of the above preferred embodiment of the present invention.

Figure 3 is a cross-sectional view taken along line A-A of Figure 1.

Figure 4 is a cross-sectional view taken along line B-B of Figure 3.

Figure 5 is a cross-sectional view taken along line C-C of Figure 4;

Figure 6 is a partial cross-sectional view of the one-way ratchet wrench of the above preferred embodiment of the present invention, showing the combination of the drive rod and the handle.

In order to explain the present invention more clearly, the preferred embodiment and the detailed description with reference to the drawings, as shown in FIG. 1 to FIG. 6 , are a one-way ratchet wrench 100 according to a preferred embodiment of the present invention, including There is a body 10, a driving rod 20, a rotating body 30, two first clamping blocks 40, a second clamping block 50, and a handle 60.

The body 10 has a head portion 12 and a handle portion 14. The head portion 12 has a receiving hole 122. The receiving hole 122 has a first opening 122a and a second opening 122b at opposite ends. A first inner ratchet 16 is disposed on the side wall of the hole 122. The handle portion 14 is connected to the head portion 12 at one end. The handle portion 14 has a shaft hole 142. The shaft hole 142 has a third opening 142a and a corresponding end. a fourth opening 142b, the third opening 142a is located at the handle The fourth opening 142b communicates with the first opening 122a of the head 12 with respect to one end of the head 12. The central axis of the accommodating hole 122 is defined as a first axis L1, and the central axis of the shaft hole 142 is defined as a second axis L2, and the first axis L1 and the second axis L2 are perpendicularly disposed.

As shown in FIG. 2 and FIG. 4, the rotating body 30 is rotatably The sleeve 30 is integrally formed with a sleeve portion 32 and a tooth portion 34. The sleeve portion 32 has a coupling hole 322 at the center for a transmission. The rod 70 is inserted therein. As shown in FIG. 2 and FIG. 3, the outer side wall of the sleeve portion 32 further has two corresponding slots 324, and each of the slots 324 is respectively provided with the first latching block 40, and each of the first latches The block 40 has a first outer ratchet 42. As shown in FIG. 3, a first elastic element 44 is disposed between each of the first latching blocks 40 and the corresponding slot 324 of the sleeve portion 32. A resilient element 44 pushes the corresponding first latching block 40 such that the first outer ratchet 42 of the first latching block 40 engages the first inner ratchet 16 of the body 10.

As shown in FIG. 4, the tooth portion 34 of the rotating body 30 faces the One end of the sleeve portion 32 has an end face ratchet 342. When the sleeve portion 32 of the rotating body 30 is inserted into the receiving hole 122, the tooth portion 34 shields the first opening 122a, and another gasket The sleeve portion 32 is disposed adjacent to one end of the second opening 122b for shielding the second opening 122b of the receiving hole 122.

The inner wall of the coupling hole 322 of the sleeve portion 32 has a chute 326, the sliding slot 326 has a second blocking surface 326a. The transmission rod 70 includes two positioning recesses 72 and a positioning hole 74. The positioning hole 74 is disposed in the center for inserting a positioning pin 76. The positioning hole is inserted into the positioning hole 76. A spring 742 has a spring 742 pushing the positioning pin 76 into the sliding slot 326. When the transmission rod 70 slides between the sleeve portions 32, the positioning pin 76 abuts against one of the blocking surfaces 326a. The movement range of the transmission rod 70 is restricted and cannot be separated from the rotating body 30. In addition, a positioning bead 724 is disposed in each of the positioning grooves 72, and the positioning is respectively performed. An elastic member 722 is disposed under the bead 724. When one of the two positioning beads 724 is embedded in the sliding slot 326, the opposite end of the driving rod 70 protrudes from the rotating body 30 so as to be connected with a sleeve (not shown). ) combined.

As shown in FIG. 2 and FIG. 5, the drive rod 20 has one end at one end. The other end of the annular tooth 22 has a driven portion 24, and the driving rod 20 is rotatably disposed in the shaft hole 142 of the body 10. The tooth surface of the annular tooth 22 of the driving rod 20 passes through the first surface. The fourth opening 142b is engaged with the end surface ratchet 342 of the rotating body 30; the lower edge of the annular tooth 22 is provided with an annular groove 26, and the handle portion 14 of the body 10 has a through hole 144 for a pin 18 Extending into the annular groove 26 of the drive rod 20, the drive rod 20 is rotatable but cannot be withdrawn relative to the body 10.

As shown in FIG. 2 and FIG. 6, a sleeve 62 is disposed on the handle. The driven portion 24 of the driving rod 20 is disposed in the sleeve 62 of the handle 60. The sleeve 62 has a second inner ratchet 622 therein. 24 has a groove 242 for receiving the second latching block 50. The second latching block 50 has a second outer ratchet 52 on the outer side of the second latching block 50. a member 54 and a positioning bead 56, the second elastic element 54 pushes the positioning bead 56 and the second clamping block 50, and the second outer ratchet 52 of the second clamping block 50 and the sleeve The second inner ratchet 622 of 62 engages.

The following illustrates the one-way ratchet wrench 100 in an extremely narrow space It can also be used in between. First, as shown in FIG. 1 and FIG. 2, in order to eliminate the backlash between the first latching block 40 and the first outer ratchet 42, the user first centers on the second axis L2 in a counterclockwise direction. The second latching block 50 is rotated together with the driving rod 20 through the sleeve 62, and the annular tooth 22 of the driving rod 20 and the end surface ratchet 342 of the rotating body 30 are rotated. Engaging the rotation, thereby driving the first latch block 40 to be displaced, and the first outer ratchet 42 of the first latch block 40 is engaged with the first inner ratchet 16 Thus, the backlash between the first outer ratchet 42 of the first latching block 40 and the first inner ratchet 16 of the body 10 is eliminated, so that the space can still be continued in a very narrow space. The handle 60 is rotated to output with a small torque, or in a small angle working environment, the handle 60 is pressed down and output with a large torque, thereby performing a locking operation.

In particular, when choosing to output in a large torque output mode When the one-way ratchet wrench 100 is used, the handle 60 is rotated in a clockwise direction and causes the first outer ratchet 42 and the first inner ratchet 16 to be enlarged, even because of the influence of the operating habit or the force-applying posture. When the backlash is between the user, the user only needs to adopt the above-mentioned anti-backlash mode, and then the second outer ratchet 52 and the second inner ratchet 622 are used for the one-way card, so that the handle is pressed down. When a high torque output is generated 60, the handle 60 will idle relative to the drive rod 20 without the problem of pulling back the backlash between the first outer ratchet 42 and the first inner ratchet 16.

The one-way ratchet wrench 100 of the embodiment provides the user without When the one-way ratchet wrench 100 is selected to be operated with a small torque or a large torque output mode, as long as the backlash between the first outer ratchet 42 and the first inner ratchet 16 is first removed in the above manner, It can be used in a narrow space. It is worth mentioning that, in addition to the aforementioned backlash between the first outer ratchet 42 and the first inner ratchet 16, the transmission rod 70 and the sleeve sleeve and the sleeve are The gap between the screw members after being combined with each other can also be eliminated by rotating the handle 60. Moreover, the one-way ratchet wrench 100 has a simple structure, which simplifies the assembly process and reduces the assembly cost.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

100‧‧‧One-way ratchet wrench

10‧‧‧ Ontology

12‧‧‧ head

122‧‧‧ accommodating holes

122a‧‧‧first opening

122b‧‧‧second opening

14‧‧‧ handle

142‧‧‧Axis hole

142a‧‧‧ third opening

142b‧‧‧fourth opening

144‧‧‧Perforation

16‧‧‧First internal ratchet

18‧‧‧ latch

20‧‧‧ drive rod

22‧‧‧ ring teeth

24‧‧‧Departed Department

242‧‧‧ trench

26‧‧‧ring groove

30‧‧‧Rotating body

32‧‧‧Sleeve Department

322‧‧‧bond hole

324‧‧‧ slotting

34‧‧‧ teeth

40‧‧‧First card block

42‧‧‧First external ratchet

44‧‧‧First elastic element

50‧‧‧Second card block

52‧‧‧Second external ratchet

54‧‧‧Second elastic element

56‧‧‧ positioning beads

60‧‧‧Handle

62‧‧‧ casing

622‧‧‧Second internal ratchet

64‧‧‧Axis hole

70‧‧‧Drive rod

724‧‧‧ positioning beads

74‧‧‧Positioning holes

76‧‧‧Locating pin

80‧‧‧shims

Claims (7)

A unidirectional ratchet wrench includes: a body including a receiving hole and a shaft hole, wherein the inner wall of the receiving hole is provided with a first inner ratchet; and a driving rod is rotatably disposed on the In the shaft hole of the main body, one end of the driving rod is provided with a ring-shaped tooth, and the other end of the driving rod is a driven portion with respect to the other end of the ring-shaped tooth; a rotating body is rotatably disposed in the receiving hole of the body The rotating body includes a sleeve portion and a tooth portion, the sleeve portion has a coupling hole for inserting a transmission rod therein, the tooth portion is coupled to one end of the sleeve portion, and has a end face ratchet and the The annular tooth of the driving rod is engaged; at least one first clamping block is disposed between the sleeve portion of the rotating body and the inner wall of the receiving hole, the first clamping block comprises a first outer ratchet and The first inner ratchet is engaged; a handle is sleeved on the driving rod in a relatively rotatable manner, and the handle comprises a sleeve, the inner wall of the sleeve is provided with a second inner ratchet; and at least one a second clamping block disposed between the sleeve of the handle and the driving rod, the second cassette It includes a second external toothed engagement with the second inner ratchet. The one-way ratchet wrench of claim 1, wherein one of the inner wall of the coupling hole of the rotating body and the transmission rod is provided with a sliding slot, the sliding slot has a second blocking surface; a positioning pin is inserted in the The locating pin on the rotating body or the transmission rod One end extends into the sliding slot, and the positioning pin contacts one of the blocking surfaces of the sliding slot to limit the range of movement of the transmission rod. The one-way ratchet wrench of claim 1, wherein the body comprises a head and a handle, the head has the receiving hole, the handle is connected to the head, and the shaft has the shaft a hole, wherein the driving rod includes an annular groove, the annular groove is located at a lower edge of the annular tooth, the handle portion of the body has a through hole, the through hole is inserted into a pin, and the end of the pin protrudes to the driving rod In the annular groove. The one-way ratchet wrench of claim 1, wherein the sleeve portion of the rotating body includes all slots, and the first latching block is disposed in the slot of the sleeve portion. The one-way ratchet wrench of claim 1, wherein the driven portion of the driving rod comprises a groove, and the second clamping block is disposed in the groove of the driving rod. The one-way ratchet wrench of claim 1, comprising a first elastic element, the first elastic element pushing the first clamping block to make the first outer ratchet and the first body of the body The internal ratchet meshes. The one-way ratchet wrench of claim 1, comprising a second elastic element, the second elastic element pushing the second clamping block to make the second outer ratchet and the sleeve The two internal ratchets mesh.