阅读说明：本技术 一种具有改进的转换开关的冲击扳手 (Impact wrench with improved change-over switch ) 是由 曹雷 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种具有改进的转换开关的冲击扳手,该转换开关包括外壳(11),电动机壳体(21),开关(31)和转换开关(41),转换开关包括推杆(43)和转换阀(42)。它们在水平方向上相互连接,其中切换阀的轴向垂直于开关的轴向,因此本发明具有切换功能,而不增加手柄(14)。(An impact wrench with an improved transfer switch includes a housing (11), a motor housing (21), a switch (31) and a transfer switch (41) including a push rod (43) and a transfer valve (42). They are connected to each other in a horizontal direction in which the axial direction of the switching valve is perpendicular to the axial direction of the switch, so that the present invention has a switching function without adding a handle (14).)

1. impact wrench with improved switch comprising an outer casing (11) with a receiving space (12) and a handle (14) with, wherein said handle (14) has an air inlet channel (141) with, a motor casing (21), said receiving recess (22) at the outer casing (11) and underside of said receiving space (12) with its inner wall on one side connected with a forward rotating air inlet channel (23) and a reverse rotating air inlet channel (24), wherein a through hole (25) is provided (at the bottom surface 21 of the motor casing) which (on the other side 22 of the inner wall of the receiving recess) is connected to a switch (31), said motor lower casing (21) and air inlet channel (141 handle) (14 possibly open) and closed, so that the passage of compressed air (141) through the receiving cavity () 22) (at the motor casing 21) occurs or can be closed, a switch (41) having a switching valve () 42 which is received in the motor housing (21) of the receiving recess 22, and a push rod (43) which is received in the motor housing (21) of the receiving recess 22 (in the through hole 25) and protrudes from both sides (11) of the housing, characterized in that the push rod (43) and the switching valve (42) are horizontal lines connected to each other, wherein the push rod (43) has a tooth () 431 at the connection side (42) of the switching valve and the switching valve (42) for the push rod connection portion () 43) a tooth portion (421) which is in engagement with the pressure rod (tube) 43 in the tooth 431, whereby the switching valve (42) rotates in the receiving recess (22) when the push rod (43) is pressed, characterized in that the axial direction 42 of the change valve (to the axial direction 31 of the switch) is perpendicular (to the axial direction 31 of the switch), and by means of the change valve (42) a handle (14) of the air inlet passage (lower side) 141 has a contact with the handle (31) Having an air inlet opening (422) and a through-opening (423) on the side of the push rod (43 facing away), which (with the air inlet opening 422), wherein the through-holes (423) (with the forward-rotating air inlet duct 23), or the reversely-rotating air inlet channel (24) can be brought into alignment when the on-off valve () connection 42) (push rod 43) is rotated, wherein (on both sides 423 of the through-holes) each have a through-hole (426, 427) provided, wherein (on both sides of the air inlet opening 422 of the switching valve (42) in each case one air outlet opening) (424, 425) is provided, which is connected with the handle (14) of the Luftauntritsky (141), wherein the two air outlet openings (424, 425) are to the through-holes (426, 427) (on both sides 423 of the through-holes), wherein, when the through-holes (423), the switching valves (42) are aligned with the forward-rotating air inlet channel (23), the air outlet hole (424) and the through hole (426) are connected with the reverse rotation air inlet passage (24), and when the through hole (423, of the switching valve (42)) is aligned with the reverse rotation air inlet passage (24), the air outlet hole (425) and the through hole (427) are connected with the forward rotation air inlet conduit (23).

2. impact wrench according to claim 1, characterized in that the actuating lever (33) of the switch (31) is received in a fastening section (HAS) 32, wherein the fastening section (32) HAS an opening (321) in the motor housing (bottom) 21) and in correspondence with the receiving recess (22), wherein the handle (14) HAS a trigger (34) from the end of the actuating lever (back) 33), whereby the trigger (34 is pressed down when connected), the actuating lever (33) is moved and thus (at the air inlet channel 141) (14 of the handle) may be opened) and closed, so that compressed air (inlet channel 141 in air) can take place, or be cut off, through the opening (321) to the motor housing (21).

Technical Field

The invention relates to an impact wrench, in particular to an impact wrench with an improved switch.

Background

With reference to fig. 8 and 9, which show a conventional impact wrench, the upper end 71 of the control rod in the handle 7 is positioned to receive the air intake valve 72, which is closed by a valve sleeve 73. Valve housing 73 has forward rotating air opening 731 and reverse rotating air opening 732. The intake valve 72 has a forward-rotation air inlet 721 corresponding to the forward-rotation air opening 731 and the reverse-rotation air opening 732. And a counter-rotating air inlet 722. The intake valve 72 is rotated relative to the valve housing 73 by the switching lever 74. When the air intake valve 72 of the forward rotation air intake 721 is aligned with the valve sleeve 73 of the forward rotation air opening 731, the impact wrench rotates forward. The impact wrench is rotated rearwardly after the valve housings 73rd of the counter-rotating air inlet 722 of the intake valve 72 having the counter-rotating air openings 732 are aligned. However, the impact wrench has the following disadvantages:

Since the air inlet valve 72 has a certain length and the control lever 71 is provided and the switching lever 74 is arranged to the air inlet valve 71, the switch 74 is turned and thus the air inlet valve 71 is blocked.

Furthermore, since the switch levers 74 are located at the front upper side of the handle, they can be actuated with difficulty.

Since the switch 7 on the handle is provided, the number of switches on the handle 7 is increased. In addition, the cross-sectional areas of the air inlet passage 74 and the air outlet passage 75 are thereby affected, thereby reducing the output torque of the impact wrench.

Disclosure of Invention

The object of the present invention is to provide an impact wrench which is smooth and easy to handle.

it is a further object of the present invention to provide an impact wrench which avoids the cross-sectional area of the air inlet duct and the air outlet passage.

These objects are achieved by an impact wrench according to the present invention, comprising:

A motor housing having an accommodating space and a handle having an air inlet passage, an outer housing having an accommodating recess on an accommodating space and a lower side of the housing with an inner wall thereof connected to a forward-rotation air inlet passage and a reverse-rotation air inlet passage on one side, characterized in that a through-hole is provided in the motor housing connected to a lower side of the other side of the inner wall of the receiving recess, a switch is provided below the motor housing to open and close the air inlet passage of the handle so that compressed air in the air inlet passage enters or is blocked by the receiving recess in the motor housing, a switching valve having a switching valve received in the accommodating recess of the motor housing and a push rod received in a hole passing through the motor housing and protruding from both sides of the housing, a changeover switch, wherein the push rod and the switching valve connected to each other in a horizontal line are, characterized in that when the push rod is pressed down, the switching valve rotates in the accommodation recess, the axial direction of the reversing valve is perpendicular to the axial direction of the switch, wherein at the bottom corresponding to the handle, the inlet passage of the inlet port and the switch valve, wherein the push rod side has a passage opening facing away from the inlet port, wherein when the switching valve is rotated by the push rod, the through hole can be aligned with the forward rotation inlet passage or the reverse rotation inlet passage.

Drawings

Figure 1 is an exploded view of the present invention,

Figure 2 is a perspective view of the reversing valve,

Figure 3 is a perspective view of the present invention,

figure 4 is a perspective view of the invention in partial cross-section,

figure 5 is a cross-sectional view of the present invention,

Figure 6 is a cross-sectional view of the present invention,

Figure 7 is a cross-sectional view according to the invention during reverse rotation,

figure 8 is an exploded view of the prior art solution,

Fig. 9 is a cross-sectional view of a prior art solution.

Detailed Description

As can be seen from fig. 1 to 5, the present invention includes an outer housing 11, a motor housing 21, a switch 31 and a switch 41.

The outer housing 11 has a receiving space 12, two opposite through holes 13 and a handle 14. The handle 14 has an air inlet passage 141 and an air inlet passage 142. An air inlet passage 141 is formed to protrude from the lower side of the nozzle 143 of the handle 14 to be connected to a compressed air pipe. The air outlet channel 142 forms a plurality of air outlet openings 144 of the handle 14 at the underside of the handle.

The motor housing 21 is provided with an electric motor (not shown) housed inside the outer housing 11 of the receiving space 12, and has a forward rotation air inlet passage 23 and an R ü ckw ä rtsdreh-connecting air inlet duct 24 on one side on the inner wall of the receiving recess 22 on the bottom side, which is connected to the engine, the engine rotates forward when compressed air enters through the forward rotation air inlet passage 23, the engine rotates backward when compressed air enters through the reverse rotation air inlet passage 24, the through hole 25 in the bottom 21 of the motor housing is provided with a through hole 22 extending perpendicular to the axial direction of the receiving recess and connected to the other side 22 of the inner wall of the receiving recess.

the switch 31 is provided in front of the handle 14 and below the motor housing 21 and has an actuating lever 33, the actuating lever 33 being accommodated in the fastening portion 32. The fastening portion 32 is located at the lower side of the motor housing 21, and has an opening 321 corresponding to the accommodation recess 22. The handle 14 facing the end of the actuating lever 33 can close the air inlet passage 141. The end 33 of the handle 14 remote from the actuating lever is provided with an air vent 34 connected thereto. When the trigger 34 is pressed, the operating lever 33 is moved and thus the handle 14 of the air intake passage 141 can be opened and closed, so that the compressed air 141 in the air intake passage can be generated or can be closed at the motor housing 21 through the opening 321.

The switch 41 includes an on-off valve 42 accommodated in the motor housing 21 of the receiving recess 22, and a push rod 43 received in the motor housing 21 of the through hole 25 and protruding from 11 of the outer housing of the through hole 13. Here, the push rod 43 and the switching valve 42 are connected to each other on a horizontal line. In the present exemplary embodiment, the plunger 43 has 42 teeth 431 on the connection side of the switching valve.

The switching valve 42 is engaged with the push rod 43 of the gear teeth 431 for a set of teeth 421 for the connection side 43 of the pressure rod. When the push rod 43 is pressed, the switching valve 42 rotates in the accommodation recess 22. The axial direction of the switching valve 42 is perpendicular to the axial direction of the switch 31. The switching valve 42 corresponds to the air inlet opening 422 of the air intake passage 141 of the handle 14 at the bottom and has a passage opening 423 on the side away from the push rod 43, the passage opening 423 being connected to the air inlet opening 422. When the switching valve 42 is rotated by the push rod 43, the through hole 423 may be aligned with the forward rotation intake passage 23 or the reverse rotation intake passage 24.

through-holes 426, 427 are provided in each case on both sides 423 of the through-hole. On both sides 422 of the air inlet opening, the valve 42 is switched over, and the air outlet openings 424, 425 are provided in each case with an air outlet channel 142 to which the handle 14 is connected. The through holes of the two exhaust holes 424, 425 extend to both sides 423 of the through hole on 426, 427, and the exhaust hole 424 and the through hole 426 are connected to the reverse rotation intake passage 24 when the through hole 423 of the switching valve 42 is aligned with the forward rotation intake passage 23. When the through hole 423 of the switching valve 42 is aligned with the reverse-rotation air inlet passage 24, the air outlet hole 425 and the through hole 427 are connected to the forward-rotation air inlet passage 23.

as can be seen in fig. 6, the valve 42 is switched, and when the user presses the push rod 43, the switch 41 is pressed a number of times. The switching valve 42 entering the through hole 423 is aligned with the forward rotation intake passage 23, and therefore, the handle 14 of the compressed air 141 flowing in the air inlet passage rotates the air inlet passage 23 in the forward direction, and thus the motor 21 rotating in the motor housing is in the forward direction. The compressed air then flows through the counter-rotating air inlet passage 24, through-hole 426 and air outlet hole 424 of the switching valve 42 exiting through the air outlet passage 142 and air outlet 144 of the handle 14.

in the reverse-rotation air inlet duct 24 and the switching valve 42 of the aligned through hole 423 as seen in fig. 7, when the user pushes 41 pieces of the push rod 43 switch in the other direction, the reverse-rotation air inlet duct 24 in the handle 14 of the compressed air 141 of the air inlet duct flows and thus rotates the motor in the motor housing 21 in the reverse direction. Then, the compressed air flows through the forward rotation air inlet passage 23, and the through hole 427 switches the air outlet hole 425 of the valve 42 to be discharged through the air outlet passage 142 and the air outlet 144 of the handle 14.

Since the switch 41 is arranged on the lower side 21 of the motor housing, the push rod 43 and the switch 41 of the switching valve 42 are connected to each other in a horizontal line, and the axial direction 42 of the switching valve extends perpendicular to the axial direction 31 of the switch, assembly is easier compared to conventional solutions since the switching valve 42 is not placed around the switch 31.

Since the push rod 43 and the switch 41 of the switching valve 42 are connected to each other in a horizontal line, the push rod 43 rotates the switching valve 42 when the alignment of the switching valve 42 of the through hole 423 with the forward rotation intake passage 23 or the reverse rotation air inlet passage 24 is brought securely and smoothly.

Further, since the motor housing 21 of the receiving recess 22 of the switch 41 of the switch valve 42 is absorbed, not at the position of the front upper side 14 of the handle, the push rod 43 is also moved, thereby making the handling easy.

Further, the influence 141 on the cross-sectional area of the air inlet passage and the air outlet passage 142 is reduced at the handle 14 when the switch 41 due to the switching of the switching valve 42 is received at the motor housing 21 of the accommodation recess 22, so that the output torque can be ensured.