CN219359391U

CN219359391U - Electric tool

Info

Publication number: CN219359391U
Application number: CN202320144466.3U
Authority: CN
Inventors: 张志峰
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-07-18
Anticipated expiration: 2033-02-07

Abstract

The utility model discloses an electric tool, which comprises a shell, wherein the shell is internally provided with: a drive mechanism including a rotor; one end of the output shaft protrudes out of the shell; the impact mechanism comprises a herringbone shaft and an impact block embedded in the periphery of the herringbone shaft, the herringbone shaft is used for driving the impact block to rotate, and the impact block is used for driving the output shaft to rotate along the axis of the impact block; the transmission mechanism is used for transmitting and connecting the herringbone shaft and the rotor; the bearing is sleeved on the herringbone shaft, a metal sheet is arranged between the end face of the bearing and the herringbone shaft, and an elastomer gasket is clamped between the metal sheet and the herringbone shaft; the driving mechanism drives the striking block to rotate through the herringbone shaft, so that the striking block drives the output shaft to rotate along the axial direction of the output shaft.

Description

Electric tool

Technical Field

The present utility model relates to an electric tool, and more particularly, to an electric tool.

Background

The electric tool includes impact wrench, among the structure of current impact wrench, the one end of the lambdoidal axle of wherein is connected with the casing through the bearing, only the centre gripping has the sheetmetal between terminal surface and the lambdoidal axle of bearing, so set up, the vibrations that lead to impact structure to produce in the impact wrench can be passed through lambdoidal axle, the sheetmetal, the bearing and transmit for the casing, the vibrations that produce when just directly having transmitted the striking of the hand of the user who holds electric tool, lead to the user to feel uncomfortable, long-time use electric tool can cause the injury to the user even.

Disclosure of Invention

The utility model aims to provide an electric tool, which can reduce vibration of the electric tool when in use.

In order to achieve the above object, the present utility model provides a power tool including a housing in which:

a drive mechanism including a rotor;

one end of the output shaft protrudes out of the shell;

the impact mechanism comprises a herringbone shaft and an impact block embedded in the periphery of the herringbone shaft, wherein the herringbone shaft is used for driving the impact block to rotate, and the impact block is used for driving the output shaft to rotate along the axis of the output shaft.

The transmission mechanism is used for transmitting and connecting the herringbone shaft and the rotor;

the bearing is sleeved on the herringbone shaft, a metal sheet is arranged between the end face of the bearing and the herringbone shaft, and an elastomer gasket is clamped between the metal sheet and the herringbone shaft;

the driving mechanism drives the striking block to rotate through the herringbone shaft, so that the striking block drives the output shaft to rotate along the axial direction of the output shaft.

In one or more embodiments, the elastomeric gasket is an annular gasket.

In one or more embodiments, the elastomeric gasket surface is provided with grooves.

In one or more embodiments, a plurality of protrusions are convexly arranged on the elastomer gasket at the contact part of the elastomer gasket and the metal sheet and/or the lambdoidal shaft.

In one or more embodiments, the herringbone shaft includes a body portion for coupling to the striking block and a coupling portion for coupling to the rotor.

In one or more embodiments, the transmission mechanism includes a planetary gear engaged with the rotor and a sun gear connected to the connection.

In one or more embodiments, the planetary gear is rotatably coupled to a latch and is coupled to the coupling portion by the latch.

In one or more embodiments, the herringbone shaft further comprises a fixing portion, and the bearing is sleeved on the fixing portion and is in interference fit with the fixing portion

In one or more embodiments, an elastic member is interposed between the striking block and the connecting portion in an axial direction of the herringbone shaft.

In one or more embodiments, the housing includes a housing for the machine shell, and a middle cover and a gear box mounted on the housing, the output shaft is located in the gear box, and one end of the output shaft protrudes out of the gear box.

Compared with the prior art, according to the electric tool disclosed by the utility model, the elastomer gasket is added between the end surface of the bearing and the herringbone shaft, part of vibration can be absorbed by the elastomer gasket, and the vibration transmitted to the metal sheet and the bearing is greatly reduced, so that the vibration transmitted to the shell by the bearing is reduced, the vibration felt by a user when the user holds the electric tool is weakened, and the user can not feel tired when using the electric tool for a long time.

Drawings

FIG. 1 is a cross-sectional view of a power tool according to an embodiment of the present utility model;

fig. 2 is an enlarged view at a in fig. 1.

The main reference numerals illustrate:

1. a housing; 11. a housing; 12. a middle cover; 13. a gear box; 2. a driving mechanism; 21. a rotor; 3. an output shaft; 4. an impact mechanism; 41. a herringbone shaft; 411. a body portion; 412. a connection part; 413. a fixing part; 42. an impact block; 43. steel balls; 44. cam grooves; 45. an elastic member; 5. a transmission mechanism; 51. a planetary gear; 52. a sun gear; 53. a plug pin; 6. a bearing; 7. a metal sheet; 8. an elastomeric gasket.

Detailed Description

The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 1 and 2, the electric power tool according to an embodiment of the present utility model includes a housing 1, and a drive mechanism 2, an output shaft 3, an impact mechanism 4, a transmission mechanism 5, and a bearing 6 mounted in the housing 1. The drive mechanism 2 includes a rotor 21; one end of the output shaft 3 protrudes out of the shell 1; the impact mechanism 4 comprises a herringbone shaft 41 and an impact block 42 embedded in the periphery of the herringbone shaft 41, the herringbone shaft 41 is used for driving the impact block 42 to rotate, and the impact block 42 is used for driving the output shaft 3 to rotate along the axis of the impact block; the transmission mechanism 5 is used for transmitting and connecting the lambdoidal shaft 41 and the rotor 21; the bearing 6 is sleeved on the lambdoidal shaft 41, a metal sheet 7 is arranged between the end face of the bearing 6 and the lambdoidal shaft 41, and an elastomer gasket 8 is clamped between the metal sheet 7 and the lambdoidal shaft 41.

It will be appreciated that in this embodiment, the electric tool may be an impact wrench, and the driving mechanism 2 may drive the striking block to rotate through the herringbone shaft 41, so that the striking block drives the output shaft 3 to rotate along the axial direction thereof, and repeatedly impact the output shaft 3 to form a continuous output strike, so that the bolt or screw is fastened or detached.

The elastomeric pad 8 may be a rubber material pad or a metallic material elastomeric pad.

In the present embodiment, the elastic body gasket 8 is an annular gasket. The elastomer spacer 8 may be sleeved on the propeller shaft 41.

Specifically, the surface of the elastomer spacer 8 is provided with grooves. The grooves can play a role in enhancing the elastic deformation of the elastomer gasket 8, thereby improving the shock absorbing effect of the elastomer gasket 8.

Specifically, a plurality of protrusions are provided on the elastomer spacer 8 at the contact points with the metal sheet 7 and/or the propeller shaft 41. The protrusions can play a role in enhancing the elastic deformation of the elastomer gasket 8, thereby improving the shock absorbing effect of the elastomer gasket 8.

In one embodiment, the herringbone shaft 41 includes a body portion 411 for connecting a striking block and a connecting portion 412 for connecting the rotor 21, and the connecting portion 412 is connected to the rotor 21 through the transmission mechanism 5.

Specifically, the propeller shaft 41 further includes a fixing portion 413, and the bearing 6 is sleeved on the fixing portion 413 and is in interference fit with the fixing portion 413, and the bearing 6 is fixedly mounted on the housing 1, so as to perform a function of fixedly mounting the propeller shaft 41 in the housing 1.

Specifically, the transmission mechanism 5 includes a planetary gear 51 and a sun gear 52 which are engaged with each other, the sun gear 52 is connected to the rotor 21, and the planetary gear 51 is connected to the connection portion 412. The sun gear 52 may be sleeved on one end of the rotor 21.

Further, the planetary gear 51 is rotatably connected to the latch 53, and is connected to the connection portion 412 through the latch 53. In other embodiments, the connection 412 may be connected to the planetary gear 51 in other ways.

In a specific embodiment, the steel ball 43 is clamped between the striking block and the connecting portion 412, and the striking block and the connecting portion 412 are both provided with the cam groove 44, and the steel ball 43 is located in the cam groove 44 and can move along the cam groove 44, so that the herringbone shaft 41 drives the striking block to rotate and drives the striking block to approach the bearing 6 along the axial direction thereof. An elastic member 45 is interposed between the striking block and the connecting portion 412 in the axial direction of the propeller shaft 41. The elastic member 45 plays a role in driving the striking block to move along the axial direction of the lambdoidal shaft 41 and away from the bearing 6, and the elastic member 45 plays a role in driving the striking block to reset. Specifically, the elastic member 45 may be a compression spring.

In a specific embodiment, the housing 1 includes a housing 11, an intermediate cover 12 mounted on the housing 11, and a gear box 13, the output shaft 3 is located in the gear box 13, and one end of the output shaft 3 protrudes outside the gear box 13. A specific intermediate cover 12 is fixedly mounted on the housing 11, and a gear case 13 is fixedly mounted on the intermediate cover 12.

It should be noted that, in the existing impact wrench, an elastomer gasket is not provided between the end faces of the herringbone shaft and the bearing, that is, the herringbone shaft is hard connected with the end faces of the bearing, the vibration generated by striking of the output shaft and the striking block is transmitted to the herringbone shaft, the elastomer gasket is directly connected with the herringbone shaft, and due to the existence of the elastomer gasket, a part of the vibration can be absorbed, then the vibration transmitted to the metal sheet is greatly reduced, after the vibration received by the metal sheet is reduced, the vibration transmitted to the bearing is correspondingly reduced, the vibration transmitted by the bearing is reduced, the bearing is directly connected with the middle cover, the reduced vibration is transmitted to the middle cover, and because the middle cover is fixed by the casing, when the user holds the electric tool, the user holds the casing handle, the vibration directly felt by the user is reduced. In summary, the electric tool of the present utility model has a good damping effect, and the user will not feel tired when using the electric tool for a long time.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. The electric tool is characterized by comprising a shell (1), wherein the shell (1) is internally provided with:

a drive mechanism (2) comprising a rotor (21);

one end of the output shaft (3) protrudes out of the shell (1);

the impact mechanism (4) comprises a herringbone shaft (41) and an impact block (42) embedded in the periphery of the herringbone shaft (41), the herringbone shaft (41) is used for driving the impact block (42) to rotate, and the impact block (42) is used for driving the output shaft (3) to rotate along the axis of the output shaft;

the transmission mechanism (5) is used for being in transmission connection with the herringbone shaft (41) and the rotor (21);

the bearing (6) is sleeved on the herringbone shaft (41), a metal sheet (7) is arranged between the end face of the bearing (6) and the herringbone shaft (41), and an elastomer gasket (8) is clamped between the metal sheet (7) and the herringbone shaft (41);

the driving mechanism (2) drives the striking block to rotate through the herringbone shaft (41) so that the striking block drives the output shaft (3) to rotate along the axial direction of the output shaft.

2. The power tool according to claim 1, wherein the elastomeric pad (8) is a ring-shaped washer.

3. A power tool according to claim 1, characterized in that the surface of the elastomer pad (8) is provided with grooves.

4. The electric tool according to claim 1, characterized in that the elastomer washer (8) is provided with a plurality of protrusions protruding at the contact with the metal sheet (7) and/or the herringbone shaft (41).

5. The electric tool according to claim 1, wherein the herringbone shaft (41) includes a body portion (411) for connecting a striking block and a connecting portion (412) for connecting a rotor (21).

6. The electric tool according to claim 5, characterized in that the transmission mechanism (5) includes a planetary gear (51) and a sun gear (52) which are meshed, the sun gear (52) being connected to the rotor (21), the planetary gear (51) being connected to the connecting portion (412).

7. The power tool according to claim 6, wherein the planetary gear (51) is rotatably connected to a pin (53) and is connected to the connection portion (412) through the pin (53).

8. The electric tool according to claim 5, wherein the herringbone shaft (41) further comprises a fixing portion (413), and the bearing (6) is sleeved on the fixing portion (413) and is in interference fit with the fixing portion (413).

9. The electric tool according to claim 5, wherein an elastic member (45) is sandwiched between the striking block and the connecting portion (412) in the axial direction of the herringbone shaft (41).

10. The electric tool according to claim 1, characterized in that the housing (1) comprises a housing (11), and a middle cover (12) and a gear box (13) mounted on the housing (11), the output shaft (3) is located in the gear box (13), and one end of the output shaft (3) protrudes outside the gear box (13).