TWM511926U - Pneumatic ratchet wrench - Google Patents

Description

Pneumatic ratchet wrench (1)

This creation is about a pneumatic tool, especially a pneumatic ratchet wrench (1) with a large contact area and a force average.

The pneumatic ratchet wrench is an auxiliary tool commonly used in the general machinery industry. It is used on the disassembling screwing component. By driving a screwing element through a propeller shaft, a pneumatic motor can quickly unlock the screwing component. function.

For example, in the invention patent of the Patent Publication No. I455798, a pneumatic driving tool having an impact type impact group is disclosed, the pneumatic driving tool comprising a handle, a casing, an impact group and a ratchet unit, the handle A driving motor is disposed at one end of the housing, and the housing is provided with one end of the driving motor, and a rotating space is formed inside the housing, and the impact group is correspondingly disposed in the rotating space. The impact group includes a rotating sleeve, a rotating base rotatably disposed in the rotating sleeve, a striking disc stuck to the rotating base, and an anvil shaft interposed on the rotating base. a ratchet unit is disposed on the housing and coupled to the anvil shaft; thereby, when the driving motor drives the rotating base to rotate, the rotating sleeve and the striking disc are driven to reciprocate through the rotating base, and The rotation of the anvil shaft is driven to drive the ratchet unit to achieve the purpose of outputting power.

The aforementioned patent uses the setting of the impact group to achieve the proper transmission function, but the configuration of the structure makes the following problems still occur in practical use:

1. The impact group uses a single hitting plate to strike the anvil axis, although it is reachable. To the expected impact, but because of the small contact area when hitting the drill shaft with a single hitch, the force between the two is not easy to average, which not only exacerbates the impact generated by the tap. The vibration force affects the smoothness of the transmission action, and is easy to cause wear and damage between the components, and the torque loss outputted by the ratchet wrench is increased, which also reduces the service life of the impact group.

2. The component of the impact group whose driving torque is the anvil axis, and the two ends of the anvil shaft respectively use an anvil and an eccentric shaft to generate and impart a torque, based on the anvil and the eccentric shaft. The structure is a structure in which the outer diameter is reduced in a straight rod shape and protruded on both sides. The short rod-like structure is easily subjected to the shock force generated by the tapping or the driving torque, thereby causing deflection or misalignment. It affects the actuation effect and reduces the service life.

The pneumatic ratchet wrench (1) of this creation hits the anvil with two right-handed hammers, which not only has a large contact area between the components, but also absorbs the force evenly, and can reduce the vibration and component wear caused by the tapping. Not only the relative power loss is small, the transmission torque is improved, and the service life of the parts is improved.

The pneumatic ratchet wrench (1) of the present invention is provided with a slope between the anvil and the long shaft body of the anvil for structural reinforcement, and a neck is provided on the long shaft body and the eccentric shaft portion for structural reinforcement, not only The strength of the overall load can reduce the probability of damage to the anvil and the eccentric shaft to improve the service life.

The pneumatic ratchet wrench (1) of the present invention is made of a separate hammer anvil structure to make the manufacture easier, and when any component is damaged, the maintenance is simple and convenient, so as to reduce the use cost. .

Therefore, a pneumatic ratchet wrench (1) proposed by the present invention can be connected to a gas supply device, and the pneumatic ratchet wrench includes a casing unit, a driving unit, a ratchet head unit and an impact clutch unit. The housing unit extends along a first axis and includes a setting An opening on the front end side, and an air inlet port disposed at the tail end and connected to the air supply device. The driving unit is received at the rear end of the housing unit and includes a driving motor and a trigger for controlling gas introduction to start the driving of the driving motor. The ratchet head unit is received in front of the housing unit and includes a power output shaft rotatably passing through the opening, the power output shaft extending along a second axis perpendicular to the first axis. The impact clutch unit is received in the housing unit, and is controlled to rotate by the output shaft of the ratchet head unit via the control of the driving motor, and includes a sleeve and a rotating seat received in the sleeve. a hammer anvil, a second hammer, and a socket ring coupled to the sleeve, wherein the sleeve has two arcuate grooves on the inner wall; the anvil has a long axis extending along the first axis a body, an anvil body adjacent to the sleeve, and an eccentric shaft portion away from the sleeve, the anvil body having an anvil portion and two protruding blocks protruding symmetrically on opposite sides of the anvil portion; a rotating base connected to the driving motor and having two notches on the left and right outer sides; the hammers respectively abutting outside the protruding block of the anvil, each hammer having a circle corresponding to the anvil a curved striking portion, a long shaft portion located on a side of the striking portion and being engaged in a recess of the sleeve, and a bump stuck in a notch of the rotating seat; the sleeve ring is The sleeve is threaded on the outside of the hammer and is positioned with the sleeve.

According to the above-mentioned present invention, a pneumatic ratchet wrench (1), wherein an anvil of the anvil extends perpendicular to a third axis of the first axis and has a diameter smaller than a diameter of the long shaft body, and the anvil A slope is connected between the long axis body.

According to the above-mentioned present invention, a pneumatic ratchet wrench (1), wherein a neck portion is engaged between an eccentric shaft portion of the anvil and the long shaft body.

The pneumatic ratchet wrench (1) according to the above-mentioned present invention, wherein the impact clutch unit further comprises a washer, the sleeve further has an inner ring step at the open end, and the sleeve ring has a cover portion and a Extending the protruding convex ring from the cover portion, the convex ring of the sleeve is extended into the inner ring step of the sleeve, and the gasket is sandwiched between the convex ring of the sleeve ring and the inner ring of the sleeve Between the steps.

According to the above-mentioned present invention, a pneumatic ratchet wrench (1), wherein When the hammer is driven to deflect, one end of the striking portion impinges on the anvil, and an inner circumference of the striking portion abuts against the protruding block, thereby allowing the two hammers to be symmetrical The hammer anvil is hooked to obtain a smooth impact.

According to the above-mentioned present invention, a pneumatic ratchet wrench (1), wherein the anvil has a first collar and a second collar, and the long shaft body and the anvil of the anvil are independent components. The eccentric shaft portion is disposed at one end of the long shaft body, and the other end of the main shaft body is provided with a first joint portion, and the other end of the anvil body is provided with a second joint portion away from the anvil portion, the first collar portion a joint portion is disposed, the first sleeve is sleeved to the outer side of the long shaft body and the anvil body, and the joint portion is combined with the first joint portion and the second joint portion to form a positioning. The second set of rings is sleeved on the outside of the anvil body.

According to the above-mentioned present invention, a pneumatic ratchet wrench (1), wherein the anvil has a washer, and a central portion of the anvil body is provided with a groove, and the gasket is sleeved on the groove.

According to the above, in order to solve the problem that the contact area of the impact group of the existing pneumatic tool is small and the force is uneven. This creation utilizes the setting of two symmetrical guns, which not only increases the contact area, but also averages the force, and can reduce the vibration and component wear caused by the tapping, the relative power loss is less, and the transmission torque is improved to improve The service life of the hammer anvil. In addition, since the force receiving portion of the impact clutch unit falls on the anvil portion of the anvil and the eccentric shaft portion, the slope is engaged between the long shaft body and the anvil portion, and in the eccentric shaft portion and The structural reinforcement of the neck between the long-axis bodies not only strengthens the strength of the overall force, but also reduces the probability of damage to the anvil and the eccentric shaft to improve the service life. Secondly, the separate hammer anvil is easier to manufacture, and when any component is damaged, it is easier to maintain and reduce the cost of use.

10‧‧‧Sheet unit

11‧‧‧ openings

12‧‧‧ Intake interface

13‧‧‧Handle

20‧‧‧Drive unit

21‧‧‧Drive motor

22‧‧‧ trigger

30‧‧‧Ratch head unit

31‧‧‧Output shaft

40‧‧‧ sleeve

41‧‧‧ Groove

42‧‧‧ inner ring

50‧‧‧ rotating seat

51‧‧‧ gap

60‧‧‧Anvil

61‧‧‧ long axis body

62‧‧‧Anvil body

621‧‧‧Anvil

622‧‧‧ protruding block

63‧‧‧Eccentric shaft

64‧‧‧ slope

65‧‧‧ neck

66‧‧‧Long-axis body

661‧‧‧ first joint

67‧‧‧Anvil body

671‧‧‧Anvil

672‧‧‧Protruding

673‧‧‧Second junction

674‧‧ ‧ Groove

675‧‧‧Washers

68‧‧‧First ring

681‧‧‧bonding site

69‧‧‧Second ring

70‧‧‧ hammer

71‧‧‧Beat Department

711‧‧‧ inner circumference

72‧‧‧Long shaft

73‧‧‧Bumps

80‧‧‧ socket

81‧‧‧ 盖部

82‧‧‧ convex ring

90‧‧‧ Washer

100‧‧‧Supply

200‧‧‧ impact clutch unit

300‧‧‧ impact clutch unit

Fig. 1 is a perspective view showing the appearance of a first preferred embodiment of the pneumatic ratchet wrench (1).

Fig. 2 is a sectional view showing the combination of the pneumatic ratchet wrench (1).

Fig. 3 is an exploded perspective view of the impact clutch unit.

Figure 4 is a cross-sectional view of the impact clutch unit and the outer casing unit extending along a second axis, illustrating the state before the hammers have not been actuated.

Figure 5 is another cross-sectional view of the impact clutch unit and the outer casing unit extending along the second axis, illustrating the state in which the hammers are driven.

Fig. 6 is an exploded perspective view of the impact clutch unit, which is a second preferred embodiment of the pneumatic ratchet wrench (1).

Referring to Figures 1 and 2, a first preferred embodiment of the present pneumatic ratchet wrench (1) can be coupled to a gas supply device 100. The pneumatic ratchet wrench includes a housing unit 10, The driving unit 20, a ratchet head unit 30 and an impact clutch unit 200 (refer to FIG. 3).

The housing unit 10 extends along a first axis L1 and includes an opening 11 disposed on a front end side, and an air inlet port 12 disposed at the tail end for connecting the air supply device 100. The gas sent by the gas supply device 100 can be entered by the intake port 12. In addition, since the housing unit 10 is not the main technical focus of the present invention, other detailed structures of the housing unit 10 will not be described in detail herein.

The driving unit 20 is received at the rear end of the housing unit 10 and includes a driving motor 21 and a trigger 22 for controlling gas introduction to start the driving of the driving motor 21.

The ratchet head unit 30 is received in front of the housing unit 10 and includes a power output shaft 31 rotatably passing through the opening 11, the output shaft 31 being perpendicular to the first axis The second axis L2 of the line L1 extends. Since the ratchet head unit 30 is not the main technical focus of the present invention, the other detailed structure of the ratchet head unit 30 will not be described in detail herein.

Referring to FIGS. 2 and 3, the impact clutch unit 200 is housed in the housing unit 10, and the output shaft 31 of the ratchet head unit 30 is rotated by the control of the drive motor 21. The clutch unit 200 includes a sleeve 40, a rotating base 50, a hammer anvil 60, a second hammer 70 and a set of retaining rings 80. The rotating base 50, the anvil 60 and the hammers 70 are received therein. Inside the sleeve 40.

The sleeve 40 has two arcuate recesses 41 on the inner wall.

The anvil 60 has a long axis body 61 extending along the first axis L1, an anvil body 62 adjacent to the sleeve 40, and an eccentric shaft portion 63 remote from the sleeve 40. The body 62 has an anvil portion 621 and two protruding blocks 622 protruding symmetrically on both sides of the anvil portion 621. The diameter of the anvil 62 of the anvil 60 perpendicular to a third axis L3 of the first axis L1 is smaller than the diameter of the long axis body 61, and the anvil 621 is coupled with the long axis body 61. There is a slope of 64. In addition, a neck portion 65 is coupled between the eccentric shaft portion 63 of the anvil 60 and the long shaft body 61. The neck portion 65 is coupled between the two to improve the strength of the eccentric shaft portion 63 and avoid stress. And broken.

The rotating base 50 is received in the sleeve 40 and connected to the driving motor 21, and has two notches 51 on the left and right outer sides.

The hammers 70 are respectively adjacent to the outer side of the protruding block 622 of the anvil body 62. Each of the hammers 70 has a circular arc-shaped striking portion 71 corresponding to the anvil portion 62, and one of the striking portions The long shaft portion 72 of one side of the sleeve 71 and the recess 41 of the sleeve 40, and a projection 73 of the notch 51 of the rotary base 50.

The sleeve ring 80 is sleeved on the outer side of the hammer 70 and is positioned with the sleeve 40.

The impact clutch unit 200 further includes a washer 90, and the sleeve 40 has a The inner ring step 42 is located at the open end, and the socket ring 80 has a cover portion 81 and a convex ring 82 extending outward from the cover portion 81. The convex ring 82 of the socket ring 80 extends into the ring The inner ring step 42 of the sleeve 40 is sandwiched between the collar 82 of the socket ring 80 and the inner ring step 42 of the sleeve 40.

Referring to FIGS. 4 and 5, after the gas supply device 100 supplies the gas to the intake port 12, the user holds a grip 13 of the housing unit 10 and presses the trigger 22, then The drive motor 21 is driven to rotate, and the rotary base 50 is rotated in conjunction with the rotation. Since the hammer 70 is pivotally disposed on the recess 41 of the sleeve 40 with the long shaft portion 72, and the projection 73 is connected to the notch 51 of the rotary base 50 to form a connection relationship, when the drive motor is used When the clock 21 rotates in a clockwise direction, the rotating base 50 rotates synchronously, and the rotating seat 50 aligns the convex portions 73 of the hammers 70 with respect to the two notched walls 51 of the hammers 70, so that the two hammers 70 are relatively long. The shaft portion 72 is rotated in a clockwise direction as a base point, so that the striking portions 71 are deflected, and one end of the striking portion 71 is struck against the anvil portion 621, and an inner peripheral edge 711 of the striking portion 71 is abutted thereon. On the protruding block 622, the two hammers 70 are oppositely symmetrically hooked to the hammer anvil 60 to achieve a smooth impact effect, and thereby generate a torque to interlock the ratchet head unit 30 to operate. This creation utilizes the setting of two symmetrical hammers 70, which not only has a large contact area and average force, but also can reduce the vibration and component wear caused by the tapping, and the relative power loss is small, and the transmission torque is improved to improve The service life of the hammer anvil 60.

The second preferred embodiment of the pneumatic ratchet wrench (1) is connected to a gas supply device 100 as shown in FIG. 1 . The pneumatic ratchet wrench includes a housing unit 10 and a driving unit 20 . A ratchet head unit 30 and an impact clutch unit 300 (see Figure 6). Since the length of the combined state of the impact clutch unit 300 is greater than the combined length of the impact clutch unit 200 in FIG. 1 , in practice, it is only necessary to increase the internal space of the housing unit 10 in FIG. 1 . This is no longer explained.

Referring to Figure 6, the difference between the second embodiment and the first embodiment is only The impact clutch unit 300 is different. Since the structure of the sleeve 40, the rotary base 50, the hammer 70, and the socket ring 80 are the same as those of the foregoing embodiment, only the difference structure between the two will be described below.

The maximum difference between the impact clutch unit 300 and the foregoing embodiment is that the anvil 60 further has a first collar 68 and a second collar 69, and the long shaft body 66 and the anvil body 62 of the anvil 60 are respectively Set as a separate component.

One end of the long shaft body 66 is provided with the eccentric shaft portion 63, and the other end of the long shaft body 66 is provided with a first joint portion 661.

The other end of the anvil body 67 is provided with a second joint portion 673 away from the anvil portion 671 and the protruding portion 672, and a groove 674 at the middle portion of the anvil body 67 is further sleeved with a gasket 675 to prevent The internal lubricating fluid (butter) leaks outward from the groove 674.

The first sleeve 68 is provided with a joint portion 681, and is sleeved to the outer side of the long shaft body 66 and the anvil body 67 to engage the first joint portion 661 and the second joint by the joint portion 681. The portion 673 urges the long axis body 66, the anvil body 67 and the first collar 68 to obtain a joint positioning function.

The second collar 69 is sleeved outside the anvil body 67.

Therefore, the second embodiment is to change the original integrated hammer anvil 60 structure to a separate design, that is, by its long axis body 66, anvil body 67, first collar 68 and a second The combination of the ferrules 69 makes the anvil 60 easy to manufacture. The operation and the efficiencies of the second embodiment are the same as those of the first embodiment, and will not be described again.

In summary, the pneumatic ratchet wrench of the present invention has the following advantages and effects:

1. Compared with the impact group of the existing ratchet wrench, the hammer hitting type hitting disc has a small contact area and uneven force on the unilateral impact during the transmission; since the impact clutch unit 200 of the present invention adopts two left and right phases The hammer 70 is symmetrically disposed on both sides of the anvil 60. When the driving motor 21 is operated and frequently impacted, the two symmetrical hammers 70 can not only increase the contact area, but also receive an average impact force. Slow down the vibration during tapping and reduce the wear of components It is not easy to cause distortion or misalignment of the components. In this way, the component life can be improved, and the effect will be more remarkable when the low rotation speed produces high torque.

2. Since the force receiving portion of the impact clutch unit 100 falls on the anvil portion 62 of the anvil 60 and the eccentric shaft portion 63, the slope 64 is engaged between the long shaft body 61 and the anvil portion 62. And reinforcing the structure of the neck portion 65 between the eccentric shaft portion 63 and the long shaft body 61, not only can load the strength of the load, but also reduce the probability of damage of the anvil portion 62 and the eccentric shaft portion 63, thereby improving Service life.

3. The impact clutch unit 300 in FIG. 6 is simpler in manufacturing by the separate hammer anvil 60 structure, and is more convenient to maintain when any component is damaged, so as to reduce the use. cost.

The above descriptions are only a few preferred embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the new description contents, All should remain within the scope of this creation patent.

40‧‧‧ sleeve

41‧‧‧ Groove

42‧‧‧ inner ring

50‧‧‧ rotating seat

51‧‧‧ gap

60‧‧‧Anvil

61‧‧‧ long axis body

62‧‧‧Anvil body

621‧‧‧Anvil

622‧‧‧ protruding block

63‧‧‧Eccentric shaft

64‧‧‧ slope

65‧‧‧ neck

70‧‧‧ hammer

71‧‧‧Beat Department

72‧‧‧Long shaft

73‧‧‧Bumps

80‧‧‧ socket

81‧‧‧ 盖部

82‧‧‧ convex ring

90‧‧‧ Washer

200‧‧‧ impact clutch unit

Claims (7)

A pneumatic ratchet wrench can be coupled to a gas supply device, the pneumatic ratchet wrench comprising: a housing unit extending along a first axis and including an opening disposed on a front end side, and a rear end And an air inlet port for connecting the air supply device; a driving unit is disposed at a rear end of the housing unit, and includes a driving motor and a trigger for controlling gas introduction to start the driving of the driving motor; a ratchet head unit , the front of the housing unit is disposed, and includes a power output shaft rotatably passing through the opening, the power output shaft extending along a second axis perpendicular to the first axis; and an impact clutch unit, Included in the housing unit, controlled by the driving motor to rotate the output shaft of the ratchet head unit, and includes a sleeve, a rotating seat received in the sleeve, an anvil, and two a hammer, and a socket ring coupled to the sleeve, wherein the sleeve has two arcuate grooves on the inner wall; the anvil has a long axis body extending along the first axis, adjacent to The anvil body of the sleeve, An anvil portion away from the sleeve, the anvil body has an anvil portion and two protruding blocks protruding symmetrically on opposite sides of the anvil; the rotating base is connected to the driving motor and has two a notch located on the left and right sides; the hammers respectively abut against the outer side of the protruding block of the anvil, each hammer has a circular arc-shaped striking portion corresponding to the anvil portion, and one of the striking portions a long shaft portion that is laterally engaged in the groove of the sleeve, and a protrusion that is caught in the notch of the rotating seat; the sleeve ring is sleeved on the outer side of the hammer and is coupled to the sleeve Phase card positioning. The pneumatic ratchet wrench of claim 1, wherein the anvil of the anvil extends perpendicular to a third axis of the first axis and has a smaller diameter than the major axis, and the anvil and the length A slope is connected between the shaft bodies. The pneumatic ratchet wrench of claim 1, wherein a neck portion is engaged between the eccentric shaft portion of the anvil and the long shaft body. The pneumatic ratchet wrench of claim 1, wherein the impact clutch unit further comprises a washer, the sleeve further has an inner ring step at the open end, and the sleeve ring has a cover portion and a cover a convex ring extending outwardly, the convex ring of the sleeve is extended into the inner ring step of the sleeve, and the gasket is sandwiched between the convex ring of the socket ring and the inner ring step of the sleeve . The pneumatic ratchet wrench of claim 1, wherein when the hammer is driven to deflect, one end of the striking portion strikes the anvil, and an inner circumference of the striking portion abuts On the protruding block, the two hammers are oppositely positioned oppositely to the hook anvil to obtain a smooth impact. The pneumatic ratchet wrench of claim 1, wherein the anvil has a first collar and a second collar, and the long axis body and the anvil of the anvil are separate components, and the eccentric shaft The first portion of the long shaft body is provided with a first joint portion, and the other end of the anvil body is provided with a second joint portion away from the anvil portion, and the first sleeve is provided with a second joint portion. The first collar is sleeved to the outer side of the long shaft body and the anvil body to form a positioning by combining the joint portion with the first joint portion and the second joint portion, and the second loop is formed. Then sleeved on the outside of the anvil body. The pneumatic ratchet wrench of claim 6, wherein the anvil has a washer, and the middle portion of the anvil body is provided with a groove, and the gasket is sleeved on the groove.