CN219170743U - Electric tool - Google Patents

Abstract

The utility model provides an electric tool, includes the casing, along vertically holding motor, drive mechanism and by drive mechanism transmits the work head of power in the casing, wherein, electric tool still including locating the work head with rotate the first mechanism between the drive mechanism, rotate the first mechanism including along being perpendicular to vertical support in the fixed axle in the casing, one end cover is located fixed axle, other end swing joint the work head is used for driving the work head is around fixed axle pivoted rotates the piece, and follows vertical locating in the fixed axle makes rotate the piece relative fixed axle circumference location's locating component. The setting of fixed axle and rotating piece makes the work head can carry out the free rotation around the fixed axle, and the setting of locating component makes the work head can further be according to the application location to suitable operational angle to realize a tractor serves several purposes with lower cost, enlarged electric tool's application scene.

Description

Electric tool

Technical Field

The utility model relates to the technical field of electric tools, in particular to an impact wrench.

Background

Impact wrenches are generally constructed as linear wrench mechanisms in which the working head extends parallel to the motor shaft and housing axis. For certain purposes, impact wrenches are also constructed as angle wrenches, in which the shaft is arranged at right angles to the motor shaft and housing axis. In some applications both line wrenches and angle wrenches must be used, for example in the installation of wooden house structures, both mechanisms must be nearby for continuous alternate use, not only cumbersome to carry, but also costly.

In view of the above, it is desirable to provide an improved impact wrench that overcomes the shortcomings of the prior art.

Disclosure of Invention

In view of the shortcomings of the prior art, an object of the present utility model is to provide a power tool that can accommodate a greater number of applications.

The technical scheme adopted for solving the problems in the prior art is as follows: the utility model provides an electric tool, includes the casing, along vertically holding motor, by motor drive's drive mechanism and by the work head of drive mechanism transmission power in the casing, its characterized in that: the electric tool further comprises a turning mechanism arranged between the working head and the transmission mechanism, the turning mechanism comprises a fixed shaft which is vertically supported in the shell, one end of the fixed shaft is sleeved with the working head, the other end of the fixed shaft is movably connected with the working head and is used for driving the working head to rotate around the fixed shaft, and a positioning assembly which is vertically arranged in the fixed shaft and enables the rotating member to be positioned relative to the fixed shaft in the circumferential direction.

The further improvement scheme is as follows: the rotating piece comprises a rotating sleeve rotating around the fixed shaft and a connecting rod extending outwards from the rotating sleeve, the rotating sleeve is provided with an inner wall facing the fixed shaft, the positioning assembly comprises a plurality of limiting grooves recessed inwards from the inner wall, and the limiting grooves are arranged at intervals along the circumferential direction of the inner wall; the fixed shaft is provided with an outer wall, the outer wall is provided with an accommodating hole facing the rotating sleeve, the positioning assembly further comprises a ball movably accommodated in the accommodating hole, and the ball is provided with a movement trend of entering one of the limiting grooves to position the rotating sleeve.

The further improvement scheme is as follows: the fixed shaft is provided with a hollow accommodating groove, the positioning assembly further comprises an executing piece and a resetting piece, the executing piece is arranged in the accommodating groove, the executing piece comprises an end part which contacts the ball and an avoidance space for the ball to retract, the avoidance space is formed between the end part and the other end of the executing piece, the resetting piece enables the end part to bias the ball outwards of the accommodating hole, and the executing piece can be operated to move vertically so that the end part is far away from the ball.

The further improvement scheme is as follows: the other end of the actuating member is exposed out of the operating end of the shell, the operating end enables the actuating member to move vertically, so that the end portion is far away from the ball, the end portion is formed into a conical shape with the diameter increased along the moving direction, and the reset member is a spring arranged between the end portion of the actuating member and the bottom of the accommodating groove.

The further improvement scheme is as follows: the executing piece further comprises a connecting part for connecting the operating end and the end part, the connecting part is provided with a shaft shoulder surface, the space between the shaft shoulder surface and the highest surface of the end part is formed into the avoidance space, and the radial size of the avoidance space is not larger than the minimum diameter of the end part; the accommodating groove comprises a counter bore for receiving the operation end, and the length of the avoidance space along the vertical direction is equal to the depth of the counter bore.

The further improvement scheme is as follows: the fixed axle is equipped with the restriction the change cover is followed the step face of vertical removal, locating component still includes along vertical protrusion in the spacer pin of step face, the inner wall of change cover is followed the direction of arranging of a plurality of spacing groove has both ends, both ends all are equipped with the spacer surface, the spacer surface backstop the spacer pin.

The further improvement scheme is as follows: the working head is provided with a cavity for receiving the connecting rod, the turning mechanism further comprises a locking pin, the connecting rod is provided with a through hole, the locking pin penetrates through the connecting rod and exposes two ends, and the two ends are supported in the cavity in a rolling mode.

The further improvement scheme is as follows: the turning mechanism comprises a force transmission assembly, the force transmission assembly comprises an input bevel gear arranged at one end of the transmission mechanism, an output bevel gear arranged at one end of the working head and a middle bevel gear sleeved on the fixed shaft, and the middle bevel gear is meshed with the input bevel gear and the output bevel gear so as to transmit power from one end of the transmission mechanism to one end of the working head.

The further improvement scheme is as follows: the middle bevel gear is sleeved below the rotating piece, a bearing is arranged between the middle bevel gear and the fixed shaft, a bearing is arranged between the input bevel gear and the shell, and a bearing is arranged between the output bevel gear and the rotating piece.

The further improvement scheme is as follows: the electric tool is an impact wrench, and the working head is a wrench head.

Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an electric tool, the setting of fixed axle and rotating the piece makes the work head carry out free rotation around the fixed axle, and the setting of locating component makes the work head can further fix a position suitable operational angle according to the application to realize a tractor serves several purposes with lower cost, enlarged electric tool's application scenario.

Drawings

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

FIG. 1 is a schematic perspective view of a power tool according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the power tool of FIG. 1 after the working head is rotated by a certain angle;

FIG. 3 is a partial cross-sectional view of the power tool of FIG. 2;

FIG. 4 is an exploded view of a partial structure of the power tool shown in FIG. 2;

FIG. 5 is an exploded view of the stationary shaft and positioning assembly in the partial configuration shown in FIG. 4;

fig. 6 is an exploded view of the rotor and the working head in the partial configuration shown in fig. 4.

Meaning of reference numerals in the drawings:

100. impact wrench 1, housing 11, head housing

2. Working head 21, cavity 23, locking pin

3. Fixed shaft 31, accommodation hole 32, accommodation groove

321. Counter bore 33, step surface

4. Rotating member 41, rotating sleeve 42 and connecting rod

411. Limit groove 412 and limit surface

5. Positioning assembly 51, ball 52 and actuator

521. End 522, operation end 523, connection portion

5231. Shoulder surface 53, compression spring 54 and limiting pin

61. Input bevel gear 62, intermediate bevel gear 63, and output bevel gear

7. Switch system 8, battery pack 91, and bearing

92. Bearing 111, casing

Detailed Description

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Words such as "upper", "lower", "front", "rear", etc., indicating an azimuth or a positional relationship are based on only the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 and 2, an impact wrench 100 according to the present utility model includes a housing 1, wherein a motor, a transmission mechanism driven by the motor, and a working head 2 driven by the transmission mechanism are longitudinally accommodated in the housing 1. The transmission mechanism comprises a gear reduction structure and an impact structure, and one end of the shell 1 far away from the working head 2 is further provided with a battery receiving part, so that the battery pack 8 is installed and detached through a detachable button. The impact wrench 100 further comprises a switching system 7 for controlling the power supply of the battery pack 8 to the motor, which, upon switching on, initiates the rotation, which moves the transmission mechanism and finally transmits the rotation and/or impact movement to the working head 2. The present utility model is described with reference to the impact wrench 100 as an example, and the working head 2 is a wrench head, however, the present utility model is applicable to other electric tools such as an electric wrench and an electric drill.

With continued reference to fig. 1 and 2, the impact wrench 100 further includes a turning mechanism disposed between the working head 2 and the transmission mechanism, where the turning mechanism includes a fixed shaft 3 vertically supported in the housing, a rotating member 4 having one end sleeved on the fixed shaft 3 and the other end movably connected to the working head 2 and used for driving the working head to rotate around the fixed shaft, and a positioning assembly 5 vertically disposed in the fixed shaft 3 and positioning the rotating member 4 circumferentially relative to the fixed shaft 3. The fixed shaft 3 and the rotating piece 4 are arranged to enable the working head 2 to freely rotate around the fixed shaft 3, and the positioning assembly 5 is arranged to enable the working head 2 to be further positioned to a proper working angle according to application occasions, so that one machine is used for two purposes at low cost, and the application surface of the impact wrench 100 is enlarged.

It should be noted that, in the present embodiment, the housing to which the working head 2 is connected is a head housing 11, the head housing 11 is independent from the housing 1 in which the motor is located, and the head housing 11 is coupled to the housing 1 in which the motor is located through a connection structure. The head housing 11 includes a casing 111 that receives the swivel mechanism. Of course, in other embodiments, the casing 111 and the head housing 11 may be integrated with the housing 1 in which the motor is located.

As shown in fig. 3 to 5, the rotating member 4 includes a rotating sleeve 41 rotating around the fixed shaft 3 and a connecting rod 42 extending outwardly from the rotating sleeve 41, the rotating sleeve 41 having an inner wall facing the fixed shaft 3, the positioning assembly 5 including a plurality of limiting slots 411 recessed inwardly from the inner wall, the plurality of limiting slots 411 being disposed at intervals along a circumferential direction of the inner wall; the fixed shaft 3 has an outer wall, the outer wall is provided with a containing hole 31 facing the rotating sleeve 41, the positioning assembly 5 further comprises a ball 51 movably contained in the containing hole 31, and the ball 51 has a movement trend of entering one of the limiting slots 411 to position the rotating sleeve 41. The outer wall of the fixed shaft 3 is matched with the inner wall of the rotating sleeve 41 in such a way that the rotating sleeve 41 is free from obstruction and smooth when rotating; while the trend of the movement of the balls 51 allows the user to position the rotating sleeve 41 at any angle of rotation relative to the fixed shaft 3 as desired.

In the present embodiment, the fixing shaft 3 has a hollow accommodating groove 32, the positioning assembly 5 further includes an actuator 52 disposed in the accommodating groove 32, the actuator 52 including an end 521 contacting the ball 51 and a escape space for retracting the ball 51, the escape space being formed between the end 521 and the other end of the actuator 52, and a return member biasing the end 521 outward of the accommodating hole 31, the actuator 52 being operable to move vertically to move the end 521 away from the ball 51. The end 521 of the actuator 52 is maintained at a position to eject the balls 51 out of the receiving hole 31 by the elastic force of the restoring member, so that the rotating sleeve 41 is positioned with respect to the fixed shaft 3 to lock the working angle of the working head 2. When the actuator 52 is operated to move vertically upward or downward, the end 521 is moved away from the ball 51 against the elastic force of the restoring member, so that the ball 51 enters the escape space, and at this time, the positioning of the rotating sleeve 41 and the fixed shaft 3 is released, and the working head 2 can be rotated again around the fixed shaft 3 to another suitable working angle.

With continued reference to fig. 4 and 5, the other end of the actuator 52 is an operating end 522 exposed to the housing 1, the operating end 522 moves the actuator 52 vertically so that the end 521 is away from the ball 51, the end 521 is formed as a conical shape with an increasing diameter in the moving direction, and the restoring member is a spring provided between the end 521 of the actuator 52 and the bottom of the accommodating groove 32.

In the present embodiment, the operating end 522 moves the actuator 52 downward in the vertical direction so that the end 521 is away from the ball 51, the end 521 is formed in a conical shape with an increasing diameter in the downward direction, and the restoring member is a compression spring 53 provided between the end 521 of the actuator 52 and the bottom of the accommodating groove 32. Pressing down the operating end 522 drives the actuator 52 to move downward against the elastic force of the compression spring 53, so that the end 521 moves downward to gradually narrow the conical surface of the contact ball 51 and not press the ball 51, the ball 51 enters the avoiding space between the end 521 and the operating end 522 along the conical surface, so that the positioning of the rotating sleeve 41 is released, and at this time, the rotating sleeve 41 can rotate along with the working head 2 to adjust the next positioning angle. The provision of the conical end 521 provides a smooth transition for the ball 51 from the depressed condition to the entry into the relief space.

Of course, in the alternative embodiment, the operating end 522 may also move the actuator 52 vertically upwards, and accordingly, the end 521 is formed in a conical shape with a diameter increasing in the rising direction, and the restoring member is a tension spring provided between the end 521 of the actuator 52 and the bottom of the accommodating groove 32, and for fixing the tension spring, holes or hooks are provided below the end 521 and at the bottom of the accommodating groove 32.

Referring to fig. 5, the actuator 52 further includes a connecting portion 523 connecting the operation end 522 and the end 521, the connecting portion 523 is provided with a shoulder surface 5231, an avoidance space is formed between the shoulder surface 5231 and the highest surface of the end 521, and the radial dimension of the avoidance space is not greater than the minimum diameter of the end 521; the receiving groove 32 includes a counterbore 321 that receives the operative end 522, and the relief space has a vertical length comparable to the depth of the counterbore 321. The arrangement of the shaft shoulder surface 5231 is convenient for limiting the avoidance space of the balls 51, and avoids the problem that the balls 51 are avoided too much to avoid and are difficult to return to the original position.

As shown in fig. 4-6, the fixed shaft 3 is provided with a step surface 33 for limiting the movement of the rotating sleeve 41 along the vertical direction, the positioning assembly 5 further comprises a limiting pin 54 vertically protruding out of the step surface 33, the inner wall of the rotating sleeve 41 is provided with two ends along the arrangement direction of the plurality of limiting slots 411, the two ends are provided with limiting surfaces 412, and the limiting surfaces 412 stop the limiting pin 54. The cooperation of the two stop surfaces 412 and the stop pin 54 defines a range of angles over which the swivel 41 can rotate, the angle being no greater than 120 degrees.

Referring back to fig. 3, the working head 2 is provided with a cavity 21 for receiving the connecting rod 42, the swivel mechanism further comprises a locking pin 23, the connecting rod 42 is provided with a through hole, the locking pin 23 penetrates the connecting rod 42 and exposes two ends, and the two ends are supported in the cavity 21 in a rolling manner. The cooperation of the locking pin 23 and the cavity 21 enables the working head 2 to be rotatably connected to the connecting rod 42, on the one hand, ensuring that the working head 2 and the swivel 41 synchronously rotate around the fixed shaft 3, and on the other hand, after the working angle of the working head 2 is fixed, the working head 2 receives the power transmitted by the transmission mechanism and outputs rotary motion or rotary-impact motion outwards. In other words, the lock pin 23 acts as a bearing, so that the working head 2 can rotate about the central axis of the connecting rod 42 as the rotation axis.

Referring to fig. 3 and 4, the swivel mechanism includes a force transmission assembly including an input bevel gear 61 provided at one end of the transmission mechanism, an output bevel gear 63 provided at one end of the working head 2, and an intermediate bevel gear 62 sleeved on the fixed shaft 3, the intermediate bevel gear 62 being engaged with the input bevel gear 61 and the output bevel gear 63 to transmit power from one end of the transmission mechanism to one end of the working head 2. By the cooperation of the three bevel gears, power is transmitted from the transmission mechanism side to the working head 2 side.

The intermediate bevel gear 62 is sleeved below the rotating member 4, a bearing 92 is arranged between the intermediate bevel gear 62 and the fixed shaft 3, a bearing 91 is arranged between the input bevel gear 61 and the shell, and a bearing is arranged between the output bevel gear 63 and the rotating member 4. The bearing provides support for the bevel gear, wherein the bearing between the output bevel gear 63 and the rotor 4 is the locking pin 23 described above, but may also be a needle bearing.

In summary, the turning mechanism of the electric tool provided by the utility model enables the working head 2 to rotate and be fixed at a proper angle position, thereby being suitable for the working requirements of various occasions, effectively controlling the cost, improving the cost performance of the electric tool and being suitable for popularization and application.

The present utility model is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that many alternatives are available for the power tool of the present utility model without departing from the spirit and scope of the present utility model. The protection scope of the present utility model is subject to the claims.

Claims (10)

1. The utility model provides an electric tool, includes the casing, along vertically holding motor, by motor drive's drive mechanism and by the work head of drive mechanism transmission power in the casing, its characterized in that: the electric tool further comprises a turning mechanism arranged between the working head and the transmission mechanism, the turning mechanism comprises a fixed shaft which is vertically supported in the shell, one end of the fixed shaft is sleeved with the working head, the other end of the fixed shaft is movably connected with the working head and is used for driving the working head to rotate around the fixed shaft, and a positioning assembly which is vertically arranged in the fixed shaft and enables the rotating member to be positioned relative to the fixed shaft in the circumferential direction.

2. The power tool of claim 1, wherein: the rotating piece comprises a rotating sleeve rotating around the fixed shaft and a connecting rod extending outwards from the rotating sleeve, the rotating sleeve is provided with an inner wall facing the fixed shaft, the positioning assembly comprises a plurality of limiting grooves recessed inwards from the inner wall, and the limiting grooves are arranged at intervals along the circumferential direction of the inner wall; the fixed shaft is provided with an outer wall, the outer wall is provided with an accommodating hole facing the rotating sleeve, the positioning assembly further comprises a ball movably accommodated in the accommodating hole, and the ball is provided with a movement trend of entering one of the limiting grooves to position the rotating sleeve.

3. The power tool of claim 2, wherein: the fixed shaft is provided with a hollow accommodating groove, the positioning assembly further comprises an executing piece and a resetting piece, the executing piece is arranged in the accommodating groove, the executing piece comprises an end part which contacts the ball and an avoidance space for the ball to retract, the avoidance space is formed between the end part and the other end of the executing piece, the resetting piece enables the end part to bias the ball outwards of the accommodating hole, and the executing piece can be operated to move vertically so that the end part is far away from the ball.

4. A power tool according to claim 3, wherein: the other end of the actuating member is exposed out of the operating end of the shell, the operating end enables the actuating member to move vertically, so that the end portion is far away from the ball, the end portion is formed into a conical shape with the diameter increased along the moving direction, and the reset member is a spring arranged between the end portion of the actuating member and the bottom of the accommodating groove.

5. The power tool of claim 4, wherein: the executing piece further comprises a connecting part for connecting the operating end and the end part, the connecting part is provided with a shaft shoulder surface, the space between the shaft shoulder surface and the highest surface of the end part is formed into the avoidance space, and the radial size of the avoidance space is not larger than the minimum diameter of the end part; the accommodating groove comprises a counter bore for receiving the operation end, and the length of the avoidance space along the vertical direction is equal to the depth of the counter bore.

6. The power tool of claim 2, wherein: the fixed axle is equipped with the restriction the change cover is followed the step face of vertical removal, locating component still includes along vertical protrusion in the spacer pin of step face, the inner wall of change cover is followed the direction of arranging of a plurality of spacing groove has both ends, both ends all are equipped with the spacer surface, the spacer surface backstop the spacer pin.

7. The power tool of claim 2, wherein: the working head is provided with a cavity for receiving the connecting rod, the turning mechanism further comprises a locking pin, the connecting rod is provided with a through hole, the locking pin penetrates through the connecting rod and exposes two ends, and the two ends are supported in the cavity in a rolling mode.

8. The power tool of claim 1, wherein: the turning mechanism comprises a force transmission assembly, the force transmission assembly comprises an input bevel gear arranged at one end of the transmission mechanism, an output bevel gear arranged at one end of the working head and a middle bevel gear sleeved on the fixed shaft, and the middle bevel gear is meshed with the input bevel gear and the output bevel gear so as to transmit power from one end of the transmission mechanism to one end of the working head.

9. The power tool of claim 8, wherein: the middle bevel gear is sleeved below the rotating piece, a bearing is arranged between the middle bevel gear and the fixed shaft, a bearing is arranged between the input bevel gear and the shell, and a bearing is arranged between the output bevel gear and the rotating piece.

10. The power tool according to any one of claims 1 to 9, wherein: the electric tool is an impact wrench, and the working head is a wrench head.

Images