CN205968797U

CN205968797U - Impact tool

Info

Publication number: CN205968797U
Application number: CN201620643091.5U
Authority: CN
Inventors: 侯维平
Original assignee: Jiangsu Dong Cheng Electromechanical Tool Co Ltd
Current assignee: Jiangsu Dong Cheng Electromechanical Tool Co Ltd
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2017-02-22
Anticipated expiration: 2026-06-27

Abstract

The utility model discloses an impact tool has motor (7) driven drive shaft (1), strikes part (2), output shaft (3), and wherein rotary motion is to drive shaft (1) drive impact part (2) to it is output rotary motion to drive output shaft (3), output shaft (3) have the output that is located the front end and are located the impact end of rear end, and cross -sectional width that should impacts end is greater than the output, and the impact end of this output shaft has a terminal dead eye of the drive shaft of acceping, above -mentioned impact part (2) have and the impact end of output shaft strikes the complex arch, the impact end of wrench end (3) has the concave elongated slot who establishes, just elongated slot and dead eye intercommunication.

Description

Percussion tool

[technical field]

This utility model is related to a kind of percussion tool with drive motor and actuating device.

[background technology]

Impact wrench, as a kind of percussion tool, is commonly used to the bolt tightening steel construction, traditionally has defeated Shaft, impact part, drive shaft, wherein output shaft have an outfan and an impact end, and impact end has one and is used for Support the dead eye of drive shaft, in the case of normal work, the impact part of impact wrench discontinuously drives output shaft to carry out Interruption rotation, and the impulsive force of storage in certain period of time is passed to output shaft, when impact part stores impulsive force Between section, with respect to workpiece transfixion, now drive shaft dallies output shaft with respect to output shaft, due to the part in rotation process Lubricant grease has been thrown out of, and in the case of lack of lubrication, the sliding friction that occurs between the two simultaneously produces high temperature, thus Have influence on the service life of output shaft and drive shaft, or even electric wrench can be allowed to produce extra noise.

[utility model content]

For solving the above problems, this utility model provides a kind of impact lubricating to increase the service life improving output shaft Instrument.

For solving above-mentioned technical problem, this utility model adopts the following technical scheme that：A kind of percussion tool, has motor 7 The drive shaft 1 of driving, impact part 2, output shaft 3, wherein drive shaft 1 drive impact part 2 to rotate, and drive output Axle 3 does output rotary motion, and described output shaft 3 has the outfan 3c and impact end 3d being located at rear end positioned at front end, this punching The cross-sectional width hitting end 3d is more than outfan 3c, and the impact end of this output shaft has the dead eye 3a housing driving shaft end, on State impact part 2 and there is the raised 2a with the impact end impact cooperation of described output shaft；The impact end of described output shaft 3 has recessed If elongated slot 3b, and described elongated slot connected with dead eye 3a.

Improvement project is further：Described elongated slot 3b has one from the farthest point 3b ' of output shaft 3 axial line, point The distance apart from output shaft 3 axle center for the 3b ' is more than the radius of drive shaft 1 and impact part 2 mating surface 1a.

Improvement project is further：The diameter being more than drive shaft 1 apart from length at described elongated slot 3b two ends.

Improvement project is further：The outfan 3c of described output shaft and the T-shaped construction of impact end 3d, and elongated slot edge Impact end 3d longitudinally is recessed.

Improvement project is further：Described drive shaft 1 rear end has planet carrier 1d, described impact part 2 pass through spring 5 with Planet carrier 1d abuts.

Improvement project is further：Described planet carrier 1d has two planetary gears 6, and described motor 7 is straight with described planetary gear 6 Connect engagement.

Improvement project is further：V-shaped groove 1c is had on described drive shaft 1, is provided between V-shaped groove 1c and impact part 2 Steel ball 4.

Improvement project is further：There is the passage 1b running through front end face, with dead eye 3a even in described drive shaft 1 Logical.

Improvement project is further：Described drive shaft 1 is provided with passage 1b, and the rear end of this passage self-powered moving axis 1 is recessed forward, And run through drive shaft 1 front end outer side wall, with the face of the inner surface of dead eye.

Compared with prior art this utility model has the advantages that：Groove on the dead eye of output shaft is by bearing The lubricant grease of in the hole is connected with outside oils and fatss, when the grease of output shaft bearing in the hole reduces because of loss, outside oils and fatss Can be supplemented in time by groove, and be absorbed the heat of the generation that rubs between output shaft and drive shaft, thus improve defeated Shaft and the life-span of drive shaft.

[brief description]

Fig. 1 be this utility model embodiment sectional view；

Fig. 2 is the three-dimensional view of drive shaft；

Fig. 3 is the three-dimensional view of impact part；

Fig. 4 is the three-dimensional view of output shaft.

The implication of in figure reference：

1st, drive shaft, 1a, mating surface, 1b, passage, 1c, V-shaped groove, 1d, planet carrier, 2, impact part, 2a, impact part Projection, 3, output shaft, 3a, dead eye, 3b, elongated slot, 3b ', elongated slot are apart from output shaft axle center solstics, 3c, output End, 3d, impact end, 4, steel ball, 5, spring, 6, planetary gear, 7, motor.

[specific embodiment]

Refer to shown in Fig. 1 to Fig. 4, percussion tool of the present utility model has the drive shaft 1 of motor 7 driving, impact portion Part 2, output shaft 3, drive shaft 1 rear end has planet carrier 1d, and impact part 2 is abutted with planet carrier 1d by spring 5, planet carrier 1d There are two planetary gears 6, described motor 7 directly engages input with described planetary gear 6, described drive shaft 1 has V-shaped groove 1c, V It is provided with steel ball 4, motor 7, by imparting power to drive shaft 1 with engaging of planetary gear 6, drives between shape groove 1c and impact part 2 Moving axis imparts power to impact part by steel ball 4, and impact part is subject to the active force of steel ball 4 and spring 5, in drive shaft On 1, drive output shaft that is movable and being interrupted rotates.

In the present embodiment, output shaft 3 has positioned at the outfan 3c of front end (A to for front end) and is located at rushing of rear end Hit end 3d, the cross-sectional width of this impact end 3d is more than outfan 3c T-shaped construction, and impact end 3d of this output shaft has collecting Drive the dead eye 3a of shaft end, impact part 2 has the raised 2a with the impact end 3d impact cooperation of described output shaft, works as punching When hitting the front end that part 2 moves to drive shaft, raised 2a clashes into the impact end of output shaft, and now drive shaft 1 is synchronous with output shaft 3 Rotation, when impact part 2 moves to the rear end of drive shaft 1, now drive shaft 1 dallies with respect to output shaft 3.

In the present embodiment, for producing high temperature, output shaft bearing hole with respect to output shaft 3 when preventing drive shaft 1 from dallying 3a is concavely provided with the elongated slot 3b of supplemental lubrication oils and fatss, and described elongated slot 3b is connected with dead eye 3a, elongated slot 3b's Outer margin contour preferably rectangle, that is, elongated slot is recessed along impact end 3d longitudinally, in order to prevent elongated slot 3b from being driven The step surface of moving axis 1 is blocked, the diameter being more than drive shaft apart from length at elongated slot 3b two ends.Certainly elongated slot 3b also may be used For other shapes, as long as that is, elongated slot arrives from 1 point of farthest 3b ' of output shaft 3 axle center and is more than drive shaft and punching with a distance from axle center Hit the radius of part mating surface 1a, so that oils and fatss can smoothly add in dead eye 3a, equally also can solve this utility model Described technical problem.

In the present embodiment, for realizing the oils and fatss of dead eye 3a are supplemented further, it is provided with inside drive shaft 1 before running through The passage 1b of end face, to connect with dead eye 3a, and described passage 1b runs through the outside in drive shaft 1 front support portion further Wall, with the face of the inner surface of dead eye 3a.

This utility model is not limited to above-mentioned specific embodiment, and those of ordinary skill in the art can easily understand Arrive, on the premise of without departing from this utility model principle and category, of the present utility model be lubricated oil to output shaft bearing hole The scheme that fat supplements also has a lot of replacement schemes, and protection domain of the present utility model is defined by the content of claims.

Claims

1. a kind of percussion tool, has the drive shaft (1) being driven by motor (7), impact part (2), output shaft (3), wherein drives Moving axis (1) drives impact part (2) to rotate, and drives output shaft (3) to do output rotary motion, described output shaft (3) There is the outfan (3c) positioned at front end and the impact end (3d) being located at rear end, the cross-sectional width of this impact end (3d) is more than output End (3c), the impact end of this output shaft has the dead eye (3a) housing driving shaft end, and above-mentioned impact part (2) has and institute State the projection (2a) of the impact end impact cooperation of output shaft；It is characterized in that：The impact end of described output shaft (3) has recessed Elongated slot (3b), and described elongated slot connected with dead eye (3a).

2. according to claim 1 percussion tool it is characterised in that：Described elongated slot (3b) has one from output shaft (3) the farthest point (3b ') of axial line, the distance apart from output shaft (3) axle center for the point (3b ') is more than drive shaft (1) and impact part (2) radius of mating surface (1a).

3. according to claim 1 percussion tool it is characterised in that：Being more than apart from length of described elongated slot (3b) two ends The diameter of drive shaft (1).

4. according to claim 1 or 3 percussion tool it is characterised in that：The outfan (3c) of described output shaft and impact end (3d) T-shaped construction, and elongated slot is recessed along impact end (3d) longitudinally.

5. according to claim 4 percussion tool it is characterised in that：Described drive shaft (1) rear end has planet carrier (1d), institute State impact part (2) to abut with planet carrier (1d) by spring (5).

6. according to claim 5 percussion tool it is characterised in that：Described planet carrier (1d) has two planetary gears (6), institute State motor (7) directly to engage with described planetary gear (6).

7. according to claim 6 percussion tool it is characterised in that：On described drive shaft (1), there is V-shaped groove (1c), V-shaped groove (1c) it is provided with steel ball (4) and impact part (2) between.

8. according to claim 1 or 3 percussion tool it is characterised in that：Have in described drive shaft (1) and run through front end face Passage (1b), to connect with dead eye (3a).

9. according to claim 8 percussion tool it is characterised in that：Described drive shaft (1) is provided with passage (1b), this passage The rear end of self-powered moving axis (1) is recessed forward, and runs through drive shaft (1) front end outer side wall, with the face of bearing internal surface of hole.