CN214025537U - Electric tool - Google Patents

Abstract

The utility model discloses an electric tool. The method comprises the following steps: the electric tool is provided with a retaining ring, the retaining ring comprises a center ring and legs which are connected with the center ring and arranged in a surrounding mode, the center ring is sleeved on the driving shaft, the protrusion of the impact component is provided with an inner end face, and the inner end face is provided with a groove for containing and clamping the legs. The utility model discloses a shank elastic support through the retaining ring realizes spacingly in the recess, effectively solves the problem that the steel ball dropped, improves life.

Description

Electric tool

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electric tool, and more particularly to an impact tool having an impact mechanism.

[ background of the invention ]

An impact mechanism is commonly used in an impact wrench, and the impact wrench is an electric power tool that converts rotation of a motor into a rotational striking force by the impact mechanism and transmits the rotational striking force to a tool bit at a front end to output the rotational striking force. Generally, the impact mechanism comprises a planet carrier and an impact block which are respectively provided with a herringbone groove, a steel ball is arranged in the herringbone groove, a motor drives the planet carrier to rotate, and the steel ball moves in the herringbone groove to drive the impact block to move back and forth; and the planet carrier is easy to generate excessive vibration in the operation process, so that the vibration of the machine and the output torsion value are unstable. The front end of the impact block of the existing impact wrench is provided with a nylon check ring, but nylon is easy to be damaged due to high-temperature melting or vibration deformation, and cannot play a role in preventing steel balls. Therefore, how to effectively prevent the steel balls from running out and the driving shaft from shaking, and the improvement of the service life and the working performance of the impact wrench becomes a very important problem.

Therefore, there is a need to design a power tool that improves tool life and performance to solve the above problems.

[ Utility model ] content

To the not enough of prior art, the utility model aims to provide a longe-lived and stable performance's electric tool.

The utility model provides a prior art problem can adopt following technical scheme: a power tool, comprising: the electric tool comprises a machine shell, a motor, a planet carrier, an impact part and an output shaft, wherein the motor is arranged in the machine shell, the planet carrier is driven by the motor, the impact part is sleeved on the planet carrier, the planet carrier is provided with a driving shaft and steel balls, the driving shaft is provided with a first herringbone groove, the impact part is provided with an end surface part, a protrusion and a second herringbone groove, the protrusion and the second herringbone groove axially extend along the end surface part, the steel balls are accommodated in the first herringbone groove and the second herringbone groove in a matched mode, the steel balls move in the herringbone groove to drive the impact part to rotate, the protrusion and the output shaft achieve striking movement, the electric tool is provided with a retaining ring, the retaining ring comprises a center ring and legs, the legs are connected with the center ring and are arranged in a surrounding mode, the center ring is sleeved on the driving shaft, the protrusion of the impact part is provided with an inner end surface, and the inner end surface is provided with a groove for accommodating and clamping the legs.

The further improvement scheme is as follows: the groove is formed in the joint of the inner end face and the end face, the groove penetrates through the protrusion on the inner end face, and one end of the check ring abuts against the end face.

The further improvement scheme is as follows: the shank is elasticity, the shank includes first end and second end, first end pass through the connection piece with the centre loop is connected, the second end is the elasticity end.

The further improvement scheme is as follows: the first end portion is provided with a clamping portion protruding outwards in the radial direction relative to the center ring, the second end portion is provided with a reinforcing portion protruding outwards in the radial direction relative to the center ring, and the reinforcing portion is provided with a hole.

The further improvement scheme is as follows: when the retainer ring is mounted in the groove, the leg portion radially abuts in the groove, and the projection is defined between the retaining portion and the reinforcement portion.

The further improvement scheme is as follows: the retainer ring is a steel sheet.

The further improvement scheme is as follows: the drive shaft protrudes in the axial direction beyond the retaining ring.

The further improvement scheme is as follows: the impact member is mounted on the carrier through a spring.

The further improvement scheme is as follows: the electric tool comprises a head shell which is positioned at the front end of the machine shell and contains the planet carrier, an inner gear ring is fixedly installed in the head shell, a planet wheel is installed on the planet carrier, the planet wheel is simultaneously meshed with the inner gear ring and the motor, and the motor drives the planet wheel to drive the planet carrier to rotate.

Compared with the prior art, the utility model discloses following beneficial effect has: the impact component is provided with an axially extending protrusion on the end face of the impact component, the inner end face of the protrusion is provided with a groove, the retainer ring is provided with a center ring and a leg portion which is connected with the center ring and surrounds the center ring, the center ring is sleeved on the driving shaft, and the leg portion is clamped in the groove, so that the problem that the steel balls fall off is effectively solved, and the service life is prolonged.

[ 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 cross-sectional view of the power tool of the present invention;

FIG. 2 is an exploded view of the power tool transmission of the present invention;

FIG. 3 is a structural view of a retainer ring of the power tool of the present invention;

fig. 4 is a structural view of the electric tool of the present invention when the retainer ring is mounted.

The meaning of the reference symbols in the figures:

100. electric tool 1, housing 11, head housing 2, motor 3, output shaft 4, planetary carrier 41, steel balls 42, planetary gear 43, first herringbone groove 44, ring gear 45, cylindrical pin 5, impact member 51, end surface portion 52, protrusion 521, inner end surface 522, groove 6, spring 7, retaining ring 71, center ring 72, connecting piece 73, leg portion 731, locking portion 732, reinforcing portion 733, hole

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1, for the present invention, the electric tool 100 is an impact wrench, the electric tool 100 includes a housing 1 and a head housing 11 installed at the front end of the housing 1, a motor 2 is accommodated in the housing 1, and a transmission mechanism and an output shaft 3 driven by the transmission mechanism are installed in the head housing 11. The transmission mechanism comprises a planet component and an impact part 5 sleeved on the planet component, the planet component comprises a planet carrier 4 with a driving shaft and steel balls 41, a planet wheel 42 arranged on the planet carrier 4, an inner gear ring 44 fixedly arranged in the head shell 11 and a cylindrical pin 45, the planet wheel 42 is arranged on the planet carrier 4 through the cylindrical pin 45, and the planet wheel 42 is simultaneously meshed with the inner gear ring 44 and the motor 2. The output shaft 3 is sleeved on the driving shaft, the impact part 5 is abutted to the planet carrier 4 through a spring 6, the driving shaft is provided with a first herringbone groove 43, the impact part 5 is provided with a second herringbone groove, and the steel ball 41 is contained between the first herringbone groove 43 and the second herringbone groove. The motor 2 is meshed with the planet wheel 42 to drive the planet carrier 4 to rotate, the steel balls 41 move in the herringbone groove, and the impact part 5 is subjected to the acting force of the steel balls 41 and the spring 6, moves back and forth on the driving shaft 4 and intermittently drives the output shaft 3 to rotate, so that striking motion is realized.

As shown in fig. 2, in the present embodiment, the impact member 5 is provided with an end surface portion 51 at an axial front end and two protrusions 52 extending forward in the axial direction of the end surface portion 51, the impact member 5 is fitted to the drive shaft, the protrusions 52 have an inner end surface 521 facing the drive shaft, the inner end surface 521 is provided with grooves 522, the grooves 522 are provided at a joint between the inner end surface 521 and the end surface portion 51, and the grooves 522 penetrate the protrusions 52 on the inner end surface 521. A retainer ring 7 is mounted in the groove 522, and one end of the retainer ring 7 abuts against the end surface portion 51 and is axially fixed to the striker 5.

As shown in fig. 3, the retainer ring 7 is made of a rigid material, the retainer ring 7 includes a central ring 71, two connecting pieces 72 protruding radially outward from the central ring 71, and leg portions 73 surrounding the connecting pieces 72 and spaced radially outward from the central ring 71, the connecting pieces 72 are circumferentially spaced apart from each other by a distance, the leg portions 73 are elastic, each leg portion 73 includes a first end portion and a second end portion, the first end portion is connected to the connecting piece 72 and provided with a locking portion 731 protruding radially outward from the central ring 71, the second end portion is an elastic tip and provided with a reinforcing portion 732 protruding radially outward from the central ring 71, a gap is provided between the second end portions, and the reinforcing portion 732 is provided with a hole 733. During assembly, the leg 73 is elastically deformed about the web 72 by inserting an additional tool into the hole 733, so that the second end portion can be radially loosened or clamped about the first end portion.

As shown in fig. 4, in an assembly view of the retainer ring 7 and the impact member 5, when the retainer ring 7 is fitted in the groove 522, the leg portions 73 apply elastic force to the protrusions 52, and the protrusions 52 are confined between the retaining portions 731 and the reinforcing portions 732, that is, the retainer ring 7 is not rotatable in the circumferential direction. The central ring 71 is sleeved outside the driving shaft, and the leg 73 is axially supported in the groove 522, the retainer ring 7 can effectively limit the position, and the central ring 71 has a certain thickness along the radial direction, so that the central ring 71 can block the steel balls 41 and prevent the steel balls 41 from falling off the herringbone groove. Meanwhile, the driving shaft always protrudes out of the retainer ring 7 in the axial direction, namely, the driving shaft is axially supported in the running process, so that the steel balls 7 can be prevented from escaping from the herringbone groove to cause tool damage, and the driving shaft can be prevented from shaking to cause machine vibration and unstable output torque value.

The utility model discloses electric tool 100's impact member 5 is equipped with axially extended arch 52 in its terminal surface 51, is equipped with recess 522 on terminal surface 521 in the arch 52, and retaining ring 7 has centre ring 71 and connects centre ring 71 and encircle the shank 73 that sets up, and centre ring 71 cup joints in the drive shaft, and shank 73 card is held in recess 522, effectively solves the problem that the steel ball dropped, improves life.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the power tool 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 (9)

1. A power tool, comprising: the planet carrier is provided with a driving shaft and steel balls, the driving shaft is provided with a first herringbone groove, the impact part is provided with an end surface part, a protrusion and a second herringbone groove, the protrusion and the second herringbone groove axially extend along the end surface part, the first herringbone groove and the second herringbone groove are matched to contain the steel balls, the steel balls move in the herringbone grooves to drive the impact part to rotate, and the protrusion and the output shaft realize striking motion; the method is characterized in that: the electric tool is provided with a retainer ring, the retainer ring comprises a center ring and leg parts which are connected with the center ring and arranged in a surrounding mode, the center ring is sleeved on the driving shaft, the protrusions of the impact part are provided with inner end faces, and the inner end faces are provided with grooves for containing and clamping the leg parts.

2. The power tool of claim 1, wherein: the groove is formed in the joint of the inner end face and the end face, the groove penetrates through the protrusion on the inner end face, and one end of the check ring abuts against the end face.

3. The power tool of claim 1, wherein: the shank is elasticity, the shank includes first end and second end, first end pass through the connection piece with the centre loop is connected, the second end is the elasticity end.

4. The power tool of claim 3, wherein: the first end portion is provided with a clamping portion protruding outwards in the radial direction relative to the center ring, the second end portion is provided with a reinforcing portion protruding outwards in the radial direction relative to the center ring, and the reinforcing portion is provided with a hole.

5. The power tool of claim 4, wherein: when the retainer ring is mounted in the groove, the leg portion radially abuts in the groove, and the projection is defined between the retaining portion and the reinforcement portion.

6. The power tool of claim 5, wherein: the retainer ring is a steel sheet.

7. The power tool of claim 6, wherein: the drive shaft protrudes in the axial direction beyond the retaining ring.

8. The power tool of claim 1, wherein: the impact member is mounted on the carrier through a spring.

9. The power tool of claim 1, wherein: the electric tool comprises a head shell which is positioned at the front end of the machine shell and contains the planet carrier, an inner gear ring is fixedly installed in the head shell, a planet wheel is installed on the planet carrier, the planet wheel is simultaneously meshed with the inner gear ring and the motor, and the motor drives the planet wheel to drive the planet carrier to rotate.

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