CN215848025U - Electric tool - Google Patents

Abstract

A power tool is provided with a plurality of gears having a torque that exhibits an increasing state. The electric tool comprises a shell, a transmission mechanism and an adjusting sleeve, wherein the transmission mechanism is positioned in the shell, the adjusting sleeve is connected to the transmission mechanism, and the transmission mechanism comprises a front gearbox body and a sounding sheet positioned at the front end of the front gearbox body. The periphery of preceding gearbox housing is located to the adjusting sleeve cover and is equipped with several recess and several dropout convex part that are located inner edge and interval and set up, and the several recess sets up corresponding to the several gear, the sinker is equipped with the arch that stretches into in the recess suddenly, the difference in height that forms between the terminal of bellied end and adjacent dropout convex part, the difference in height between the terminal of bellied end and several dropout convex part presents the increase state. Under the condition that the adjustment sleeve guarantees no gear jumping, the castors are enabled to form incremental deformation along with the lifting of gears, namely, the castors are slightly deformed in the low gear, and therefore the service life of the castors is prolonged.

Description

Electric tool

[ technical field ]

The utility model relates to the technical field of electric tools, in particular to an electric tool with multiple gear adjustment functions.

[ background art ]

The impact electric drill is a common decoration electric tool, and is generally provided with a screwdriver gear, an electric drill gear and an impact gear for convenient use, the adjustment of the three gears is realized by changing the torque of the internal structure of the electric drill and whether to jump the gear, and the most common method is to fix a sound piece on a gearbox shell and simultaneously match with a plurality of concave-convex structures in a torque cover. In the rotation process of the torque force cover, the concave-convex structure in the torque force cover drives the sound sheet to continuously and repeatedly compress and deform along the radial position to generate 'click' sound; meanwhile, when the electric drill is tripped at a screw gear or works at an electric drill gear, the torque cover can be subjected to tangential rotation force in the working state.

The height difference exists between the bulges of the torsion cover and the bulges of the castors due to the staggering, and the height difference determines the amplitude service life of the repeated deformation of the castors and whether the torsion cover can be prevented from jumping out of the gear caused by the tangential force of the torsion cover; usually, the convex inner vertex of the torque force cover forms a complete circle by taking the center of the torque force cover as the center of the circle. The torsion cover described above generally suffers from two disadvantages: firstly, the height difference is designed to be large, although the torsion cover can be prevented from jumping, the whole circle of bulges are all on one concentric circle, the deformation of the castanets is large and the stress is consistent every time, so that the castanets are easy to break and lose efficacy; and secondly, the height difference is designed to be small, so that although the service life of compression deformation of the castors can be improved, the torsion cover cannot be prevented from jumping out of the gear due to the tangential force of the torsion cover.

Accordingly, there is a need for an improved power tool that overcomes the deficiencies of the prior art.

[ contents of utility model ]

In view of the shortcomings of the prior art, the utility model aims to provide an electric tool with an improved adjusting sleeve, wherein the adjusting sleeve can prolong the service life of a sound piece under the condition of ensuring no jump stop.

The technical scheme adopted by the utility model for solving the problems in the prior art is as follows: a power tool is provided with a plurality of gear positions having different torques and exhibiting an increased torque state. The electric tool comprises a shell, a transmission mechanism and an adjusting sleeve, wherein the transmission mechanism is arranged in the shell, the adjusting sleeve is connected to the transmission mechanism, and the transmission mechanism comprises a rear gear box body, a front gear box body and a sounding sheet, the front gear box body extends forwards from the front end face of the rear gear box body, and the sounding sheet is arranged at the front end of the front gear box body. The adjusting sleeve is sleeved on the periphery of the front gearbox body and provided with a plurality of grooves and a plurality of tripping convex parts, the grooves correspond to the plurality of gears, the tripping convex parts are spaced from the grooves, every tripping convex part is adjacent to every two grooves, the grooves protrude inwards, the sounding sheet is provided with a protrusion extending into the grooves, and the protruding tail end and the adjacent tail end of the tripping convex parts are formed with a height difference in the radial direction. The height difference between the tail end of the protrusion and the tail ends of the plurality of tripping convex parts is in an increasing state, when the electric tool switches gears, the protrusion moves from the current groove to the adjacent groove, and at the moment, the castanets deform corresponding to the height difference of the adjacent tripping convex parts so as to cross the adjacent tripping convex parts and move into the adjacent grooves.

The further improvement scheme is as follows: the distances from the bottom walls of the grooves to the circle center of the adjusting sleeve are the same, and the distances from the tail ends of the tripping convex parts to the circle center of the adjusting sleeve are in a descending state.

The further improvement scheme is as follows: the front gear box body comprises an annular pressing plate located at the front end, the pressing plate is provided with a clamping groove located in the circumferential direction, and the castanets are clamped in the clamping groove.

The further improvement scheme is as follows: the sound piece is bow-shaped setting and is equipped with and is located the centre protruding and be located the jack catch at protruding both ends, the jack catch card is held in the screens inslot, just protruding outside salient stretches out the periphery of clamp plate.

The further improvement scheme is as follows: the electric tool further comprises a torsion adjusting mechanism coated by the adjusting sleeve, the torsion adjusting mechanism comprises a torsion nut, a torsion spring and a torsion gasket which are sequentially sleeved on the periphery of the front gearbox body from front to back, and the pressing plate is arranged at the front end of the torsion nut.

The further improvement scheme is as follows: the torque nut has an internal thread and the front gearbox housing has an external thread, the torque nut having an axial movement relative to the front gearbox housing by the cooperation of the internal thread and the external thread.

The further improvement scheme is as follows: the torsion gasket is abutted against the front end face of the rear gearbox body, two axial ends of the torsion spring are respectively abutted against the torsion nut and the torsion gasket, and the torsion nut adjusts acting force exerted on the torsion gasket through the torsion spring.

The further improvement scheme is as follows: the adjusting sleeve is provided with a plurality of scales located on the peripheral surface, the scales correspond to the plurality of gears, the shell is provided with an identification arrow, the electric tool is located at a certain position, and the identification arrow points to the current position corresponding to the scales.

The further improvement scheme is as follows: the electric tool is an impact electric drill and is provided with a screwdriver block, an electric drill block and an impact block, and the torque moments of the screwdriver block, the electric drill block and the impact block are increased in sequence.

The further improvement scheme is as follows: the screwdriver block is provided with three or more gears, and the torque of the three or more gears is in a linear increasing state.

Compared with the prior art, the utility model has the following beneficial effects: when the electric tool switches gears, the protrusion moves from the current groove to the adjacent groove, and at the moment, the sound piece deforms corresponding to the height difference of the adjacent tripping convex part so as to cross the adjacent tripping convex part and move into the adjacent groove. According to different torque moments of a plurality of gears, the height difference between the protrusions of the castors and the tripping convex parts of the adjusting sleeve is reasonably matched, namely the height difference between the tail ends of the protrusions and the tail ends of the tripping convex parts is increased, so that the castors have gradual compression deformation when the electric tool is switched over. Under the condition that the adjustment sleeve guarantees no gear jumping, the castors are enabled to form incremental deformation along with the lifting of gears, namely, the castors are slightly deformed in the low gear, and therefore the service life of the castors is prolonged.

[ description of the drawings ]

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings:

FIG. 1 is a front view of a power tool in accordance with a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the power tool shown in FIG. 1;

FIG. 3 is a partially exploded view of an output structure in the power tool shown in FIG. 1;

FIG. 4 is a front view of the output structure shown in FIG. 3;

FIG. 5 is a front view of the adjustment sleeve in the output configuration shown in FIG. 4;

fig. 6 is a front view of the output structure of fig. 4 with the pressure plate and the response piece combined.

The meaning of the reference symbols in the figures:

100. the electric tool 10, the housing 11, the main body 110, the arrow mark 12, the holding portion 13, the operation button 20, the motor 30, the transmission mechanism 31, the rear gear box 32, the front gear box 33, the pressing plate 331, the locking groove 34, the sounding sheet 341, the protrusion 342, the claw 40, the output shaft 50, the torque adjusting mechanism 51, the torque nut 52, the torque spring 53, the torque washer 60, the adjusting sleeve 61, the groove 62, the release protrusion 63, the scale 70, the battery pack

[ detailed description of the utility model ]

The terminology used in the description of the utility model herein 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," and the like, which indicate orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the present invention.

Referring to fig. 1 to 2, an electric tool 100 according to the present invention is provided with N (N ≧ 3) gears, where the N gears have different torques and the torques are increased in an increasing manner, i.e., the torques in the N gears from a low gear to a high gear increase linearly from small to large. In the present embodiment, the electric power tool 100 is a dc impact electric drill, and includes a screwdriver bit stop, an electric drill stop, and an impact stop, and torque of the three increases in order. The screwdriver block has three or more gears, and the torque of the three or more gears is in a linear increasing state, specifically, the screwdriver block has 22 gears from the 1 st gear to the 22 nd gear, and the torque of the 1 st gear to the 22 nd gear is also in a linear increasing state.

The electric tool 100 comprises a housing 10, a motor 20 positioned in the housing 10, a transmission mechanism 30 connected to the motor 20, an output shaft 40 driven by the transmission mechanism 30, a torsion adjusting mechanism 50 and an adjusting sleeve 60 connected to the transmission mechanism 30, and a battery pack 70, wherein the battery pack 70 is used for supplying power to the electric tool 100. The motor 20 drives the output shaft 40 to operate through the transmission mechanism 30, and the adjusting sleeve 60 adjusts the gear of the power tool 100 through the torsion adjusting mechanism 50, so that the power tool 100 is in a proper working state.

The housing 10 includes a main body portion 11 extending along an axial direction and a holding portion 12 connected to a lower portion of the main body portion 11, the motor 20, the transmission mechanism 30 and the output shaft 40 are all accommodated in the main body portion 11, and the battery pack 70 is connected to a lower end of the holding portion 12. The holding portion 12 is used for holding when a user operates the electric tool, and is provided with an operation button 13, and the operation button 13 is operated by the user to control the start and stop of the electric tool 100.

As shown in fig. 3, the transmission mechanism 30 includes a rear gear housing 31 located at the front end of the motor 20, a front gear housing 32 extending forward from the front end surface of the rear gear housing 31, and an annular pressing plate 33 and a clicker 34 located at the front end of the front gear housing 32. The motor 20 extends forwards into the rear gear box 31 and the output shaft 40 is accommodated in the front gear box 32 from front to back, so that the motor 20 drives the output shaft 40 to operate through the transmission mechanism 30.

Referring to fig. 4 to 6, the pressing plate 33 is fixed at the front end of the front gear case 32 and is provided with a locking groove 331 located on the circumferential direction thereof, and the castors 34 are locked in the locking groove 331. The castors 34 are disposed in an arc shape and provided with a protrusion 341 in the middle and claws 342 at two ends of the protrusion 314, and the protrusion 341 protrudes outward from the outer periphery of the pressing plate 33. The claws 342 are caught in the catching grooves 331 to hold the clicker 34 to the pressing plate 33, so that the clicker 34 is fixed to the front gear case 32.

Referring to fig. 2 to 3, the torque adjusting mechanism 50 is sleeved on the outer periphery of the front gear case 32 and includes a torque nut 51, a torque spring 52 and a torque washer 53 sequentially sleeved on the outer periphery of the front gear case 32 from front to back, and the pressing plate 33 is disposed at the front end of the torque nut 51. The torque nut 51 has an internal thread and the front gear housing 32 has an external thread, and the torque nut 51 has an axial movement relative to the front gear housing 32 by the engagement of the internal thread and the external thread. The torsion washer 53 abuts against the front end surface of the rear gear housing 31, the two axial ends of the torsion spring 52 abut against the torsion nut 51 and the torsion washer 53, respectively, and the torsion nut 51 adjusts the acting force applied to the torsion washer 53 through the torsion spring 52.

The adjusting sleeve is wrapped around the torque adjusting mechanism 50, and the adjusting sleeve 60 adjusts the force applied to the torque spacer 53 through the torque nut 51, so as to switch the gear of the electric tool 100. Referring to fig. 5, the adjusting sleeve 60 is sleeved on the outer periphery of the front gear case 32 and is provided with N grooves 61 and N-1 tripping protrusions 62, the N grooves 61 are arranged along the counterclockwise direction corresponding to the sequence from the low gear to the high gear in the N gears, the tripping protrusions 62 are spaced from the grooves 61, and each tripping protrusion 62 protrudes inward from between two adjacent grooves 61. The projections 341 of the castors 34 project into the grooves 61, so that a height difference in the radial direction is formed between the tip of the projection 341 and the tip of the adjacent trip projection 62.

When the electric tool 100 switches the gear, the protrusion 341 moves from the current groove 61 to the adjacent groove 61, and at this time, the castellations 34 are deformed corresponding to the height difference of the adjacent tripping projections 62, so as to move into the adjacent grooves 61 beyond the adjacent tripping projections 62. In the utility model, the distances from the bottom walls of the N grooves 61 to the center of the adjusting sleeve 60 are the same, and the distances from the tail ends of the N-1 tripping convex parts 62 to the center of the adjusting sleeve 60 are in a decreasing state, namely the height difference between the tail end of the protrusion 341 and the tail ends of the N-1 tripping convex parts 62 is in an increasing state; so that the castors 34 have a gradual compression set when the power tool 100 is shifted. The adjusting sleeve 60 ensures that the castors 34 form an increasing deformation amount along with the lifting of the gear under the condition of ensuring no gear jump, namely, the castors 34 have smaller deformation at a low gear, so that the service life of the castors 34 is prolonged.

The adjusting sleeve 60 is further provided with N scales 63 located on the outer peripheral surface, the N scales 63 correspond to the N gears, and the housing 10 is provided with an identification arrow 110 located at the front end thereof and adjacent to the scales 63. When the electric tool 100 is located at a certain gear, the identification arrow 110 points to the scale 63 corresponding to the current gear, so that the user can visually observe the gear where the electric tool 100 is located.

In the present invention, when the electric tool 100 switches the gear, the protrusion 341 moves from the current groove 61 to the adjacent groove 61, and at this time, the castellations 34 deform corresponding to the height difference of the adjacent tripping projections 62, so as to move into the adjacent groove 61 beyond the adjacent tripping projections 62. According to different torques of N gears, the height difference between the protrusion 341 of the paired castors 34 and the tripping convex part 62 of the adjusting sleeve 60, namely the height difference between the tail end of the protrusion 341 and the tail end of the N-1 tripping convex parts 62, is increased, so that the castors 34 have gradually-changed compression deformation when the electric tool 100 performs gear shifting. The adjusting sleeve 60 ensures that the castors 34 form an increasing deformation amount along with the lifting of the gear under the condition of ensuring no gear jump, namely, the castors 34 have smaller deformation at a low gear, so that the service life of the castors 34 is prolonged.

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

Claims (10)

1. An electric power tool is provided with a plurality of gear positions having different torques and exhibiting an increased torque state, the electric tool comprises a shell, a transmission mechanism positioned in the shell and an adjusting sleeve connected with the transmission mechanism, the transmission mechanism comprises a rear gear box body, a front gear box body extending forwards from the front end surface of the rear gear box body and a sound piece positioned at the front end of the front gear box body, the adjusting sleeve is sleeved on the periphery of the front gearbox body and is provided with a plurality of grooves and a plurality of tripping convex parts which are positioned on the inner edge, the plurality of grooves are arranged corresponding to the plurality of gears, the tripping convex parts are spaced from the grooves, each tripping convex part protrudes inwards from the space between two adjacent grooves, the castellations are provided with bulges which extend into the grooves, a height difference in the radial direction is formed between the tail end of the protrusion and the tail end of the adjacent tripping convex part; the method is characterized in that: the height difference between the tail end of the protrusion and the tail ends of the plurality of tripping convex parts is in an increasing state, when the electric tool switches gears, the protrusion moves from the current groove to the adjacent groove, and at the moment, the castanets deform corresponding to the height difference of the adjacent tripping convex parts so as to cross the adjacent tripping convex parts and move into the adjacent grooves.

2. The power tool of claim 1, wherein: the distances from the bottom walls of the grooves to the circle center of the adjusting sleeve are the same, and the distances from the tail ends of the tripping convex parts to the circle center of the adjusting sleeve are in a descending state.

3. The power tool of claim 1, wherein: the front gear box body comprises an annular pressing plate located at the front end, the pressing plate is provided with a clamping groove located in the circumferential direction, and the castanets are clamped in the clamping groove.

4. The power tool of claim 3, wherein: the sound piece is bow-shaped setting and is equipped with and is located the centre protruding and be located the jack catch at protruding both ends, the jack catch card is held in the screens inslot, just protruding outside salient stretches out the periphery of clamp plate.

5. The power tool of claim 3, wherein: the electric tool further comprises a torsion adjusting mechanism coated by the adjusting sleeve, the torsion adjusting mechanism comprises a torsion nut, a torsion spring and a torsion gasket which are sequentially sleeved on the periphery of the front gearbox body from front to back, and the pressing plate is arranged at the front end of the torsion nut.

6. The power tool of claim 5, wherein: the torque nut has an internal thread and the front gearbox housing has an external thread, the torque nut having an axial movement relative to the front gearbox housing by the cooperation of the internal thread and the external thread.

7. The power tool of claim 6, wherein: the torsion gasket is abutted against the front end face of the rear gearbox body, two axial ends of the torsion spring are respectively abutted against the torsion nut and the torsion gasket, and the torsion nut adjusts acting force exerted on the torsion gasket through the torsion spring.

8. The power tool of claim 1, wherein: the adjusting sleeve is provided with a plurality of scales located on the peripheral surface, the scales correspond to the plurality of gears, the shell is provided with an identification arrow, the electric tool is located at a certain position, and the identification arrow points to the current position corresponding to the scales.

9. The power tool of claim 8, wherein: the electric tool is an impact electric drill and is provided with a screwdriver block, an electric drill block and an impact block, and the torque moments of the screwdriver block, the electric drill block and the impact block are increased in sequence.

10. The power tool of claim 9, wherein: the screwdriver block is provided with three or more gears, and the torque of the three or more gears is in a linear increasing state.

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