CN112388557A

CN112388557A - Impact wrench

Info

Publication number: CN112388557A
Application number: CN201910762730.8A
Authority: CN
Inventors: 邓正宜; 王英堂
Original assignee: Mobiletron Electronics Co Ltd
Current assignee: Mobiletron Electronics Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2021-02-23

Abstract

An impact wrench comprises a front housing and a motor, wherein a transmission mechanism and an impact mechanism are arranged in the front housing, the motor changes the force transmission direction through the transmission mechanism to drive an acting element of the impact mechanism to rotate, and one part of the acting element is exposed out of the front housing; the front housing includes a housing base and a housing cover which are detachably connected, and the detachable design between the housing base and the housing cover is convenient for the user to perform the internal maintenance of the impact wrench.

Description

Impact wrench

Technical Field

The present invention relates to impact wrenches; in particular to an impact wrench which can be disassembled to facilitate the maintenance.

Background

In modern industrial applications, in addition to using a general screwdriver or a wrench to tighten or loosen a fastener (such as a screw or a nut), most users nowadays choose to use an impact tool (or a power tool) to improve the working efficiency, wherein the impact tool can provide high torque and high impact force to effectively and rapidly tighten or loosen the fastener, thereby achieving the effect of getting twice the effort.

However, in order to solve the problem that the impact tool cannot be applied to a narrow space, a practitioner has developed an impact tool, which generally includes a motor, a transmission device and an impact device, wherein an output shaft of the motor is connected to the linkage device, an acting element of the impact device converts a torque provided by the motor into a powerful rotational impact through the transmission of the transmission device, wherein the transmission device generally includes a plurality of transmission gears (e.g., bevel gear sets), and the output of the output shaft of the motor is transmitted through the transmission device such that an axis of the acting element of the impact device and an axis of the output shaft of the motor form a right angle, thereby solving the problem that the impact tool cannot be applied to a narrow space.

The impact tool is easy to accumulate dust inside the impact tool after long-term use, so that the abrasion among gears or bearings is aggravated, and in order to guarantee the rotation precision of the impact tool, the impact tool needs to be cleaned inside and lubricated by oil after being used for a period of time.

Disclosure of Invention

Accordingly, the present invention is directed to an impact wrench, which has a detachable housing, and is easy to assemble and disassemble for facilitating the internal maintenance of the impact wrench.

The present invention provides an impact wrench, which includes a front housing and a motor, wherein the front housing is provided therein with a transmission mechanism and an impact mechanism, the motor changes a force transmission direction through the transmission mechanism to drive an acting element of the impact mechanism to rotate, and a portion of the acting element is exposed out of the front housing; the front shell comprises a shell seat and a shell cover which are combined in a separable way, wherein the shell seat is provided with a first joint surface and a first abutting surface which are adjacent, the first joint surface and the first abutting surface are not positioned on the same horizontal plane, and the first joint surface and the first abutting surface are arranged in a non-vertical way; the shell has a second joint face and a second abutting face, the second joint face is closely attached to the first joint face, the second abutting face is closely attached to the first abutting face, the shell has a through hole, and a part of the acting element penetrates through the through hole.

The invention also provides an impact wrench, which comprises a front housing and a motor, wherein the front housing is internally provided with a transmission mechanism and an impact mechanism, the motor changes the force transmission direction through the transmission mechanism to drive an acting element of the impact mechanism to rotate, and one part of the acting element is exposed out of the front housing; the front shell comprises a shell seat, a first shade and a second shade, the shell seat, the first shade and the second shade are arranged in an enclosing mode to form an accommodating space, the first shade is provided with a through hole, a part of the acting element penetrates through the through hole, when the second shade is removed, an opening of the front shell is exposed, and the opening is communicated with the accommodating space.

The impact wrench of the present invention has the effect that the impact wrench includes a housing and a housing cover that are detachably coupled to facilitate the internal maintenance of the impact wrench, and the impact wrench of the present invention also provides the effect that the first mask and the second mask are detachably coupled to the housing and facilitate the internal maintenance of the impact wrench.

Drawings

Fig. 1 is a perspective view of an impact wrench according to a first preferred embodiment of the present invention.

Fig. 2 is a side view of the impact wrench according to the above preferred embodiment of the present invention.

FIG. 3 is an exploded view of a portion of the impact wrench in accordance with the preferred embodiment of the present invention.

Fig. 4 is a partial sectional view of the impact wrench according to the above preferred embodiment of the present invention.

Fig. 5 is a side view of a part of the components of the impact wrench according to the above preferred embodiment of the present invention.

FIG. 6 is a side view of a portion of the components of an impact wrench in accordance with another preferred embodiment of the present invention.

FIG. 7 is a side view of a portion of the components of an impact wrench in accordance with another preferred embodiment of the present invention.

FIG. 8 is an exploded view of a portion of an impact wrench in accordance with a second preferred embodiment of the present invention.

FIG. 9 is an exploded view of a portion of the impact wrench in accordance with the preferred embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the present invention, preferred embodiments will be described in detail below with reference to the accompanying drawings. Referring to fig. 1 to 5, an impact wrench 1 according to a first preferred embodiment of the present invention includes a front housing 10, a rear housing 20, a transmission mechanism 30, an impact mechanism 40, and a motor (not shown), wherein the transmission mechanism 30 and the impact mechanism 40 are disposed in the front housing 10, and the motor is disposed in a receiving space in the rear housing 20. In practice, the receiving space inside the rear housing 20 may further contain components such as a control circuit board, a battery, a power converter, a switch assembly, an antenna, a receiver, and the like, and in addition, the rear housing 20 may further be provided with an operation interface such as a start switch, a reverse switch, and the like for starting the impact wrench 1 to operate or changing the rotation direction of the impact wrench 1, but not limited thereto. The transmission mechanism 30 includes a reduction gear set, a bevel gear set 32 and other gear components, the gear components are driven by the output shaft of the motor to drive the impact mechanism 40 to move, the output shaft of the motor rotates around a first axis L1, the impact mechanism 40 has a acting element 42, the acting element 42 is rod-shaped, one end of the acting element 42 extends out of the through hole 101 of the front housing 10, one end of the acting element 42 extending out of the through hole 101 is polygonal, the acting element 42 rotates around a second axis L2, in this embodiment, the second axis L2 is designed to be perpendicular to the first axis L1, but in other applications, the second axis L3526 is not limited to be perpendicular, and other angles can be adopted. The aforementioned reaction member 42 may be adapted to engage a tool, wherein the tool may be a socket, an electric drill or a screwdriver bit.

The front case 10 includes a housing 12 and a cover 14, the cover 14 is detachably coupled to the housing 12, the cover 14 has the through hole 101, and a portion of the acting element 42 passes through the through hole 101. The transmission mechanism 30 and the impact mechanism 40 are disposed in the housing 12, and when the housing 14 is detached from the housing 12, a portion of the transmission mechanism 30 and a portion of the impact mechanism 40 are exposed to the outside, so as to facilitate maintenance such as adding lubricant or cleaning for the transmission mechanism 30 or the impact mechanism 40 disposed inside the front housing 10. The housing 12 of this embodiment has a first receiving slot 121, the housing 14 has a second receiving slot 141, one side of the transmission mechanism 30 and the impact mechanism 40 is received in the first receiving slot 121, the other side of the transmission mechanism 30 and the impact mechanism 40 is received in the second receiving slot 141, wherein two sides of the transmission mechanism 30 are respectively abutted against the first receiving slot 121 and the second receiving slot 141 by a bearing 50, one side of the impact mechanism 40 is abutted against the first receiving slot 121 by a bearing 50, the other side is abutted against the second receiving slot 141 by a gasket 52, and the housing 14 and the housing 12 are locked and fixed by a fastening member 54 such as a bolt, so that the transmission mechanism 30 and the impact mechanism can be stably installed in an inner receiving space formed by the housing 12 and the housing 14.

The housing 12 has a first engaging surface 122 and a first abutting surface 123 adjacent to each other, the first engaging surface 122 and the first abutting surface 123 are not located on the same horizontal plane, and the first engaging surface 122 and the first abutting surface 123 are not vertically disposed. The casing 14 has a second joint surface 142 and a second abutting surface 143, when the casing base 12 and the casing 14 are combined, the second joint surface 142 abuts against the first joint surface 122, the second abutting surface 143 abuts against the first abutting surface 123, referring to fig. 5, in this embodiment, the first joint surface 122 and the second joint surface 142 are both flat surfaces, the first abutting surface 123 is a concave arc surface, and the second abutting surface 143 is correspondingly configured as a convex arc surface, wherein the casing 14 has two protruding members 144, the protruding members 144 are disposed on the second abutting surface 143, the first abutting surface 123 of the casing base 12 has two grooves 124 disposed corresponding to the protruding members 144, so that, when the second abutting surface 143 abuts against the first abutting surface 123, the protruding members 144 are engaged with the grooves 124, which has the effects of quick installation and positioning, and increasing the assembling convenience of the casing 14 and the casing base 12, moreover, when the fastening member 54 passes through the protrusion 144 on the housing 14 and is locked and fixed with the groove 124 on the housing 12, because the first engaging surface and the first abutting surface and the second engaging surface and the second abutting surface are not located on the same horizontal plane, and the first engaging surface 122 and the first abutting surface 123 are not vertically disposed, the first abutting surface 123 and the second abutting surface 143 are more tightly combined by the vertical component force of the fastening member 54 acting on the first abutting surface 123 and the second abutting surface 143, which has the effects of increasing the tightness of the combination of the housing 14 and the housing 12 and improving dust ingress.

In practice, the first abutting surface 123 and the second abutting surface 143 may also be flat surfaces as shown in fig. 6, or the first abutting surface 123 is a convex arc surface as shown in fig. 7, and the second abutting surface 143 is correspondingly configured as a concave arc surface, which has the aforementioned functions, but the first abutting surface 123 and the second abutting surface 143 in the first preferred embodiment are not limited to being concave arc surfaces.

Please refer to fig. 8 to 9, which is an impact wrench 2 according to a second preferred embodiment of the present invention, and has a structure substantially the same as the impact wrench 1 according to the first preferred embodiment, and is not repeated herein, except that the housing 60 is composed of a first mask 60a and a second mask 60b, the housing 12, the first mask 60a and the second mask 60b enclose to form an accommodating space, when the second mask 60b is removed, an opening 102 of the front housing 10 is exposed, the opening 102 is communicated with the accommodating space, the first mask 60a has the through hole 101, a portion of the acting element 42 passes through the through hole 101, the second mask 60b is adjacent to the first mask 60a and located on the same side of the housing 12 as the first mask 60a, wherein the first mask 60a and the second mask 60b are detachably coupled to the housing 12, in the present embodiment, the first shield 60a and the second shield 60b are locked and fixed to the housing 12 by fasteners 54 such as bolts.

The housing 12 has the first receiving groove 121, and the first mask 60a has the second receiving groove 141, so that the transmission mechanism 30 and the impact mechanism 40 can be stably installed in the receiving space, and when the second mask 60b is detached from the housing 12 as shown in fig. 9, a user can perform maintenance such as injecting lubricant into the interior of the impact tool 2 through the opening 102 without damaging the components of the transmission mechanism 30 and the impact mechanism 40, which has the effect of repositioning the transmission mechanism 30 and the impact mechanism 40 after maintenance without consuming time, thereby improving the efficiency of maintenance, and furthermore, the user can detach the first mask 60a and the second mask 60b from the housing at the same time according to the needs, so as to detach or maintain the transmission mechanism 30 or the impact mechanism 40.

It should be noted that the first mask 60a has an extending portion 146 near the opening 102, the second mask 60b has a locking groove 147 corresponding to the extending portion 146 on a side facing the accommodating space, when the first mask 60a and the second mask 60b are combined with the housing base 12, the locking groove 147 is combined with the extending portion 146, which has an effect of preventing dust from entering the impact tool 2 from a gap between the first mask 60a and the second mask 60b, preferably, a joint surface between the locking groove 147 and the extending portion 146 is designed as an arc surface.

The arrangement among the first joint surface 122, the first abutting surface 123, the second joint surface 142 and the second abutting surface 143 is the same as that of the first preferred embodiment, and is not described herein again, except that in this embodiment, the first mask 60a has the second joint surface 142, the second mask 60b has the second abutting surface 143, and the second mask 60b has the protruding member 144, the plurality of protruding members 144 are disposed on the second abutting surface 143, and the first abutting surface 123 of the housing 12 has two grooves 124 corresponding to the plurality of protruding members 144, so that, when the second abutting surface 143 of the second mask 60b is tightly abutted against the first abutting surface 123 of the housing 12, the protruding members 144 and the recesses 124 are engaged with each other, so as to achieve the effects of quick installation and positioning and increasing the assembling convenience of the second mask 60b and the housing 12.

In addition, in this embodiment, the first abutting surface 123 of the housing base 12 is a concave arc surface, the second abutting surface 143 of the second mask 60b is correspondingly configured as a convex arc surface, and because the first joint surface 122 and the first abutting surface 123, and the second joint surface 142 and the second abutting surface 143 are not located on the same horizontal plane, and the first joint surface 122 and the first abutting surface 123 are not vertically arranged, the first abutting surface 123 and the second abutting surface 143 are more tightly combined by the vertical component force applied to the first abutting surface 123 and the second abutting surface 143 by the fastening member 54, so as to increase the tightness of the combination of the second mask 60b and the housing base 12 and improve the dust penetration. In practice, the first abutting surface 123 and the second abutting surface 143 may be flat surfaces as described above, or the first abutting surface 123 is a convex arc surface, and the second abutting surface 143 is correspondingly configured as a concave arc surface.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described and claimed should be included in the scope of the present invention.

Description of the reference numerals

[ invention ]

1 impact wrench

10 front case

101 through hole 102 opening

12 shell base

121 first receiving groove 122 first engaging surface 123 first abutting surface

124 groove

14 housing 14a first mask 14b second mask

141 second receiving groove 142, second joint surface 143, and second abutting surface

144 projection 146 extension 147 catch

20 rear shell

30 drive mechanism

32 bevel gear set

40 impact mechanism

42 acting element

50 bearing

52 facing 54 fastener

L1 first axis

Second axis L2

2 impact wrench

60 housing 60a first mask 60b second mask

Claims

1. An impact wrench comprises a front housing and a motor, wherein a transmission mechanism and an impact mechanism are arranged in the front housing, the motor changes the force transmission direction through the transmission mechanism to drive an acting element of the impact mechanism to rotate, and a part of the acting element is protruded out of the front housing; the method is characterized in that:

the front shell comprises a shell seat and a shell cover which are combined in a separable way, wherein the shell seat is provided with a first joint surface and a first abutting surface which are abutted, the first joint surface and the first abutting surface are not positioned on the same horizontal plane, and the first joint surface and the first abutting surface are arranged in a non-vertical way; the shell is provided with a second joint surface and a second abutting surface, the second joint surface is closely attached to the first joint surface, the second abutting surface is closely attached to the first abutting surface, the shell is provided with a through hole, and a part of the acting element penetrates through the through hole.

2. The impact wrench of claim 1, wherein the first and second abutment surfaces are arcuate surfaces.

3. The impact wrench of claim 1, wherein the first and second abutment surfaces are planar.

4. The impact wrench as claimed in any one of claims 1 to 3, wherein said housing has two projections provided on said second abutment surface, said first abutment surface of said housing seat has two recesses provided corresponding to said two projections, and said two projections engage with said two recesses when said second abutment surface abuts against said first abutment surface.

5. The impact wrench of any one of claims 1 to 3, wherein the housing has a first receiving slot, the housing has a second receiving slot, one side of the transmission mechanism and the impact mechanism is received in the first receiving slot, and the other side of the transmission mechanism and the impact mechanism is received in the second receiving slot.

6. An impact wrench comprises a front housing and a motor, wherein a transmission mechanism and an impact mechanism are arranged in the front housing, the motor changes the force transmission direction through the transmission mechanism to drive an acting element of the impact mechanism to rotate, and a part of the acting element is protruded out of the front housing; the method is characterized in that:

the front shell comprises a shell seat, a first shade and a second shade, the shell seat, the first shade and the second shade are arranged in an enclosing mode to form an accommodating space, the first shade is provided with a through hole, a part of the acting element penetrates through the through hole, when the second shade is removed, an opening of the front shell is exposed, and the opening is communicated with the accommodating space.

7. The impact wrench of claim 6, wherein the second shroud is disposed adjacent to the first shroud and on a same side of the housing as the first shroud.

8. The impact wrench as claimed in claim 6, wherein the first cover has an extending portion near the opening, the second cover has a locking groove corresponding to the extending portion on a side facing the accommodating space, and the locking groove is engaged with the extending portion when the first cover and the second cover are engaged with the housing.

9. The impact wrench of claim 6, wherein the housing has a first engaging surface and a first abutting surface that are adjacent to each other, the first engaging surface and the first abutting surface are not located on the same horizontal plane, and the first engaging surface and the first abutting surface are disposed non-perpendicularly; the first shade has a second joint surface, the second shade has a second to support and lean on the face, the second joint surface pastes closely first joint surface, the second supports to lean on the face and pastes closely first support and lean on the face.

10. The impact wrench of claim 9, wherein the first and second abutment surfaces are arcuate surfaces.

11. The impact wrench of claim 9, wherein the first and second abutment surfaces are planar.

12. The impact wrench of any one of claims 9 to 11, wherein the second shroud has two projections disposed on the second abutment surface, the first abutment surface of the housing seat has two recesses disposed corresponding to the two projections, and the second abutment surface abuts against the first abutment surface, and each projection is engaged with each recess.

13. The impact wrench of any one of claims 9 to 11, wherein the housing has a first receiving slot, the first mask has a second receiving slot, one side of the impact mechanism is received in the first receiving slot, the other side of the impact mechanism is received in the second receiving slot, one side of the transmission mechanism is received in the first receiving slot, and the other side of the transmission mechanism is received in the second receiving slot.