CN212704539U

CN212704539U - Impact electric drill

Info

Publication number: CN212704539U
Application number: CN202021160207.2U
Authority: CN
Inventors: 周超; 庄榜锋
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-03-16
Anticipated expiration: 2030-06-19

Abstract

The utility model provides an electric impact drill, includes shell, actuating mechanism, gear box, work head and shifts and push away the button, the shell includes the back casing and holds the chamber, actuating mechanism accepts in holding the intracavity. The gear box comprises a front box body and a rear box body, the front box body is connected to the front end of the rear shell body and exposed out to serve as a part of the shell, the rear box body is accommodated in the accommodating cavity and connected to the driving mechanism, the working head is connected to the front end of the front box body and driven by the driving mechanism, and the gear shifting push button is installed at the top of the shell. The front box body comprises a constraint cavity which is recessed forwards from the rear end face and a through hole which penetrates through the front end face and the rear end face, the constraint cavity is used for accommodating the front portion of the gear shifting push button, and the through hole is communicated with the constraint cavity. Therefore, an air duct positioned at the constraint cavity is formed in the front box body of the gear box, and dust is prevented from accumulating in the constraint cavity when the gear box is used for a long time; meanwhile, the formation of the air duct can further dissipate heat of the gear box, so that the temperature of the gear box is reduced.

Description

Impact electric drill

[ technical field ]

The utility model relates to a double speed electric drill technical field, in particular to double speed electric impact drill.

[ background art ]

The electric drill is a product with the largest sales volume in the electric tool industry, is widely applied to the industries of buildings, decoration, furniture and the like, and can drill holes or penetrate objects on the objects; and during drilling, a large amount of dust and debris is typically generated. A two speed electric drill with high and low gear adjustment typically includes a housing, a motor, a gear box and a working head, the motor being housed within the housing and driving the working head to actuate via the gear box. Meanwhile, the double-speed electric drill is provided with a gear shifting toggle button which is arranged on the shell and used for adjusting the high and low gears of the double-speed electric drill; furthermore, the gearbox is usually provided with a constraining cavity corresponding to the position of the shift knob to give way when adjusting the shift knob. However, because a large amount of dust and debris exist in the using environment of the electric drill, the dust in the restraint cavity can be accumulated after long-term use, the shifting knob interferes with the dust in the restraint cavity, the shifting knob cannot be adjusted back to the right position, and the speed change of the whole electric drill is disabled.

Accordingly, there is a need for an improved electric impact drill that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To prior art not enough, the utility model aims to provide an electric impact drill with gear box, the restraint chamber department of gear box forms the wind channel to prevent the dust accumulation.

The utility model provides a technical scheme that prior art problem adopted is: the utility model provides an electric impact drill, includes shell, actuating mechanism, gear box, work head and shifts and push away the button, the shell include the back casing and by the chamber that holds that the back casing formed, actuating mechanism accept in hold the intracavity. The gear box comprises a front box body and a rear box body, the front box body is detachably connected to the front end of the rear shell body and is exposed out to serve as a part of the shell, the rear box body is accommodated in the accommodating cavity and is connected to the driving mechanism, the working head is connected to the front end of the front box body and is driven by the driving mechanism, and the gear shifting push button is installed at the top of the shell and slides along the front-back direction. The gear shifting push button is located above the rear box body and is connected to the rear box body through a steel wire shifting fork, the front box body comprises a restraint cavity which is recessed from the rear end face to the front and a through hole which penetrates through the front end face and the rear end face, the restraint cavity is used for accommodating the front portion of the gear shifting push button, and the through hole is communicated with the restraint cavity.

The further improvement scheme is as follows: the radial dimension of the front box body is larger than that of the rear box body, and the constraint cavity is positioned above the front end of the rear box body.

The further improvement scheme is as follows: the front box body is provided with a plurality of lugs extending in the radial direction, the lugs are arranged along the circumferential direction of the front box body, and the front box body is connected with the rear shell in an inserting mode or a threaded mode through the lugs.

The further improvement scheme is as follows: the gear shifting push button comprises a sliding portion and a push button portion, the sliding portion is located in the shell, the push button portion protrudes upwards from the top of the sliding portion, the sliding portion slides forwards and backwards relative to the inner wall of the shell, the front portion of the sliding portion protrudes into the constraint cavity, and the push button portion penetrates through the opening upwards and protrudes out of the outer side of the shell.

The further improvement scheme is as follows: the gear shifting push button slides forwards and backwards in the axial direction and is provided with a first position sliding to the front and a second position sliding to the rear, and when the gear shifting push button is located at the first position, the front part of the sliding part is completely filled in the constraint cavity.

The further improvement scheme is as follows: the work head is including being connected to the transmission shaft of gear box front end, the electric impact drill is including setting up the drive gear group in the gear box, the input of drive gear group connect in actuating mechanism's output, just the output of drive gear group connect in the rear end of transmission shaft.

The further improvement scheme is as follows: the gear box comprises an extension section which is positioned at the front part of the front box body and extends axially forwards, and the transmission shaft penetrates through the extension section and is connected to the transmission gear set.

The further improvement scheme is as follows: the number of the extension sections is at least three, and the extension sections are arranged along the circumferential direction of the transmission shaft.

The further improvement scheme is as follows: the work head portion includes that the cover is located in proper order in the fore-and-aft direction torque cover and gear switching cover on the extension section, the torque cover gear switching cover reaches preceding box forms jointly the procapsid of shell.

The further improvement scheme is as follows: the working head part also comprises a drill chuck positioned in front of the torque sleeve, and the drill chuck is connected to the front end of the transmission shaft in a transmission way.

Compared with the prior art, the utility model discloses following beneficial effect has: the gear shifting push button is located above the rear box body and is connected to the rear box body through a steel wire shifting fork, the front box body comprises a restraint cavity which is recessed forwards from the rear end face and a through hole which penetrates through the front end face and the rear end face, the restraint cavity is used for accommodating the front portion of the gear shifting push button, and the through hole is communicated with the restraint cavity. Therefore, an air duct positioned at the constraint cavity is formed in the front box body of the gear box, and dust is prevented from accumulating in the constraint cavity when the gear box is used for a long time; meanwhile, the formation of the air duct can further dissipate heat of the gear box, so that the temperature of the gear box is reduced.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a perspective view of an electric impact drill according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the impact drill shown in FIG. 1;

FIG. 3 is a perspective view of a gear box and shift knob assembly of the electric impact drill shown in FIG. 1;

FIG. 4 is an exploded schematic view of the gear box and shift push button assembly shown in FIG. 3;

fig. 5 is a cross-sectional view of the gear box and shift push button assembly shown in fig. 3.

The meaning of the reference symbols in the figures:

100. the electric impact drill 10, the shell 11, the rear shell 110, the accommodating cavity 15, the opening 20, the driving mechanism 30, the gear box 31, the front box body 32, the rear box body 33, the extension section 34, the restraining cavity 35, the through hole 36, the lug 40, the working head 41, the transmission shaft 42, the torque sleeve 43, the gear switching sleeve 44, the drill chuck 50, the gear shifting push button 51, the wire shift fork 52, the sliding part 53, the push button part 60 and the transmission gear set

[ detailed description of the invention ]

Referring to fig. 1 to 5, the present invention discloses an electric impact drill 100, which includes a housing 10, a driving mechanism 20, a gear box 30, a working head 40 and a gear-shifting push button 50, wherein in the present embodiment, the driving mechanism 20 may be a brushless motor. Shell 10 includes continuous procapsid and back casing 11 around the back, back casing 11 is including the fixed left casing and the right casing of mutually supporting, the left casing and the right casing of back casing 11 mutually support to form and hold chamber 110, actuating mechanism 20 is acceptd in holding chamber 110. The lower portion of the rear case 11 serves as a grip portion for a user to hold the impact drill 100 when operating.

As shown in fig. 3 to 5, the gear housing 30 includes a front housing 31 and a rear housing 32 connected to each other, and the radial dimension of the front housing 31 is larger than that of the rear housing 32. The front case 31 is detachably coupled to a front end of the rear case 11 and is exposed as a portion of the housing 10, and the rear case 32 is received in the receiving chamber 110 and is coupled to the driving mechanism 20. In the present embodiment, the front case 31 has a plurality of lugs 36 extending in the radial direction, the lugs 36 are arranged along the circumferential direction of the front case 31, and the front case 31 is connected with the rear housing 11 in a plug-in manner through the lugs 36; in other embodiments, the front case 31 and the rear case 11 may be screwed together. Meanwhile, the gear box 30 further includes extension sections 33 located in front of the front box 31 and extending axially forward, the number of the extension sections 33 is at least three, and the extension sections 33 are arranged along the circumferential direction of the front box 31.

Referring to fig. 1 to 2, the working head 40 is connected to the front end of the front box 31 and driven by the driving mechanism 20. The working head 40 includes a transmission shaft 41 connected to the front end of the gear box 30, a torque sleeve 42 and a gear shift sleeve 43 sequentially sleeved on the extension section 33 in the front-rear direction, and a drill chuck 44 located in front of the torque sleeve 42, wherein the drill chuck 44 is in transmission connection with the front end of the transmission shaft 41. The extension sections 33 of the gear boxes 30 are arranged along the circumferential direction of the transmission shaft 41, and the transmission shaft 41 passes through the extension sections 33 and extends into the front case 31.

The electric impact drill 100 further comprises a transmission gear set 60 arranged in the gear box 30, an input end of the transmission gear set 60 is connected to an output end of the driving mechanism 20, and an output end of the transmission gear set 60 is connected to the rear end of the transmission shaft 41. I.e. the drive shaft 41 passes through the extension 33 and is connected to a drive gear set 60 within the gear box 30.

The gear shift sleeve 43 is sleeved on the extension section 33 and connected to the front end face of the front box body 31, the torque sleeve 42 is also sleeved on the extension section 33 and connected to the front end of the gear shift sleeve, and the torque sleeve 42, the gear shift sleeve 43 and the front box body 31 form a front shell of the housing 10 together. Still hold impact mechanism in torque sleeve 42 and the gear shift cover 43, impact mechanism sets up between drive gear group 60 and transmission shaft 41, just impact mechanism can adopt prior art, and for example impact mechanism includes preceding impact block and the right impact block that can intermeshing or separate, and all overlaps and establish on transmission shaft 41.

The gear shifting push button 50 is installed at the top of the housing 10 and slides in the front-rear direction, and the gear shifting push button 50 is located above the rear case 32 and is connected to the rear case 32 through a wire shifter 51. The steel wire shifting fork 51 extends into the rear box body 32 and is connected to the transmission gear set 60, the gear shifting push button 50 slides along the front-back direction to drive the transmission gear set 60 in the rear box body 32 to move axially by driving the steel wire shifting fork 51, so as to adjust the high-low speed gear of the electric impact drill 100. The front box 31 comprises a constraint cavity 34 recessed forwards from the rear end face and a through hole 35 penetrating through the front end face and the rear end face, the constraint cavity 34 is located above the front end of the rear box 32 and used for accommodating the front portion of the gear shifting push button 50, and the through hole 35 is communicated with the constraint cavity 34 to form an air duct.

In this embodiment, the housing 10 is provided with an opening 15 at the top and adjacent to the front box 31, the gear shifting push button 50 is located at the opening 15 and includes a sliding portion 52 located inside the housing 10 and a push button portion 53 protruding upward from the top of the sliding portion 52, the sliding portion 52 slides back and forth relative to the inner wall of the housing 10 and protrudes forward into the constraint cavity 34, and the push button portion 35 passes through the opening 15 upward and protrudes outward from the housing 10, so as to facilitate the gear shifting operation of the user. The shift knob 52 slides back and forth in the axial direction and has a first position to slide forward and a second position to slide backward, and when the shift knob 50 is located at the first position, the front portion of the sliding portion 52 completely fills the constraining chamber 34.

The utility model discloses in, it pushes away button 50 to shift is located the top of back box 32 and is connected to back box 32 through steel wire shift fork 51, preceding box 31 includes from the rear end face forward sunken restraint chamber 34 and runs through the through-hole 35 of preceding terminal surface and rear end face, restraint chamber 34 is used for holding the anterior of pushing away button 50 of shifting, through-hole 35 intercommunication restraint chamber 34. Therefore, an air duct positioned at the constraint cavity 34 is formed in the front box body 31 of the gear box 30, and dust is prevented from being accumulated in the constraint cavity 34 in long-term use; meanwhile, the formation of the air duct can further dissipate heat of the gear box 30, thereby reducing the temperature at the gear box 30.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many alternatives to the disclosed electric impact drill may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. An electric impact drill comprises a shell, a driving mechanism, a gear box, a working head and a gear shifting push button, wherein the shell comprises a rear shell and a containing cavity formed by the rear shell, the driving mechanism is contained in the containing cavity, the gear box comprises a front box body and a rear box body, the front box body is detachably connected to the front end of the rear shell and is exposed out to be used as a part of the shell, the rear box body is contained in the containing cavity and is connected to the driving mechanism, the working head is connected to the front end of the front box body and is driven by the driving mechanism, and the gear shifting push button is installed at the top of the shell and slides along the front-back direction; the method is characterized in that: the gear shifting push button is located above the rear box body and is connected to the rear box body through a steel wire shifting fork, the front box body comprises a restraint cavity which is recessed from the rear end face to the front and a through hole which penetrates through the front end face and the rear end face, the restraint cavity is used for accommodating the front portion of the gear shifting push button, and the through hole is communicated with the restraint cavity.

2. The impact drill of claim 1, wherein: the radial dimension of the front box body is larger than that of the rear box body, and the constraint cavity is positioned above the front end of the rear box body.

3. The impact drill of claim 2, wherein: the front box body is provided with a plurality of lugs extending in the radial direction, the lugs are arranged along the circumferential direction of the front box body, and the front box body is connected with the rear shell in an inserting mode or a threaded mode through the lugs.

4. The impact drill of claim 2, wherein: the gear shifting push button comprises a sliding portion and a push button portion, the sliding portion is located in the shell, the push button portion protrudes upwards from the top of the sliding portion, the sliding portion slides forwards and backwards relative to the inner wall of the shell, the front portion of the sliding portion protrudes into the constraint cavity, and the push button portion penetrates through the opening upwards and protrudes out of the outer side of the shell.

5. The impact drill of claim 4, wherein: the gear shifting push button slides forwards and backwards in the axial direction and is provided with a first position sliding to the front and a second position sliding to the rear, and when the gear shifting push button is located at the first position, the front part of the sliding part is completely filled in the constraint cavity.

6. The impact drill of claim 1, wherein: the work head is including being connected to the transmission shaft of gear box front end, the electric impact drill is including setting up the drive gear group in the gear box, the input of drive gear group connect in actuating mechanism's output, just the output of drive gear group connect in the rear end of transmission shaft.

7. The impact drill of claim 6, wherein: the gear box comprises an extension section which is positioned at the front part of the front box body and extends axially forwards, and the transmission shaft penetrates through the extension section and is connected to the transmission gear set.

8. The impact drill of claim 7, wherein: the number of the extension sections is at least three, and the extension sections are arranged along the circumferential direction of the transmission shaft.

9. The impact drill of claim 7, wherein: the work head portion includes that the cover is located in proper order in the fore-and-aft direction torque cover and gear switching cover on the extension section, the torque cover gear switching cover reaches preceding box forms jointly the procapsid of shell.

10. The impact drill of claim 9, wherein: the working head part also comprises a drill chuck positioned in front of the torque sleeve, and the drill chuck is connected to the front end of the transmission shaft in a transmission way.