CN219854412U - Power tool with additional head - Google Patents

Abstract

The utility model discloses a power tool with an additional head, which comprises a main body and a plurality of additional heads, wherein the plurality of additional heads are selectively matched with the main body, the main body comprises a shell, a motor and a power output shaft, the plurality of additional heads comprise a first type of additional heads and a second type of additional heads with different structures, the main body also comprises a first adapting mechanism and a second adapting mechanism, the first type of additional heads are mounted to the main body through the first adapting mechanism, and the second type of additional heads are mounted to the main body through the second adapting mechanism; the first adapting mechanism comprises a locking mechanism for locking the first type of additional head and a first limiting mechanism for limiting the circumferential movement of the first type of additional head relative to the main body, and the second adapting mechanism comprises a second limiting mechanism for limiting the movement of the second type of additional head relative to the main body, and the second limiting mechanism is arranged on the power output shaft. The power tool can be adapted to the additional heads with different connecting structures, and has stronger applicability.

Description

Power tool with additional head

Technical Field

The utility model relates to the field of electric tools, in particular to a power tool with an additional head.

Background

Electric tools, in particular hand-held electric tools, are increasingly used in the mechanical industry, in the construction industry, in medical treatment and in people's daily life. Hand-held power tools are of a wide variety including electric drills, screwdrivers, scissors, electric bottle openers, and the like. In daily operations, it is often necessary to use different power tools to perform different operations. However, if all kinds of electric tools are purchased, the cost is high for the user. Therefore, the utility model provides a power tool with an additional head, which adopts a mode of adapting a tool main body to a plurality of additional heads to solve the problems, thus not only meeting the requirement of multiple functions, but also reducing the cost.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model aims to provide a power tool with an additional head, which can be matched with the additional heads with different structures, has more functions, and has simple implementation mode and low cost.

To achieve the above object, a power tool with an additional head of the present utility model includes a main body including a housing, a motor, a power output shaft, and a plurality of additional heads selectively adapted to the main body, the plurality of additional heads including a first type of additional head and a second type of additional head having different configurations, the main body further including a first adapting mechanism by which the first type of additional head is mounted to the main body, and a second adapting mechanism by which the second type of additional head is mounted to the main body; the first adapting mechanism comprises a locking mechanism for locking the first type of additional head and a first limiting mechanism for limiting the circumferential movement of the first type of additional head relative to the main body, and the second adapting mechanism comprises a second limiting mechanism for limiting the movement of the second type of additional head relative to the main body, and the second limiting mechanism is arranged on the power output shaft.

In one embodiment, the first type of additional head comprises a first rotary shaft, the second type of additional head comprises a second rotary shaft, the power output shaft is provided with a blind hole at one end facing the additional head, the first rotary shaft is matched with the blind hole, and the second rotary shaft is matched with the outer wall of the power output shaft.

In one embodiment, the locking mechanism cooperates with the housing of the first type of attachment head, and the first spacing mechanism includes a plurality of first grooves arranged circumferentially.

In one embodiment, the body further comprises a gear box, the locking mechanism is mounted on the gear box by a spring, and the first limiting mechanism is formed on the gear box.

In one embodiment, the locking mechanism comprises a pair of locking buttons having locking hooks on a side facing the attachment head, the housing of the first type of attachment head forming an inwardly curved edge at an end facing the body, the locking hooks cooperating with the edge.

In one embodiment, the first type of attachment head includes a positioning flange having a plurality of circumferentially disposed protrusions on an inner wall of the positioning flange that mate with the first grooves of the first spacing mechanism.

In one embodiment, the second limiting mechanism includes a plurality of second grooves formed on the outer wall of the power take-off shaft and arranged in a circumferential direction.

In one embodiment, the second type of attachment head includes a quick change sleeve, a quick change sleeve liner, a plurality of steel balls and a return spring, the steel balls are matched with the second groove, the return spring acts on the quick change sleeve, and the quick change sleeve liner is installed in the quick change sleeve and can displace together with the quick change sleeve under the action of the return spring and acts on the steel balls.

In one embodiment, the steel balls are disposed in holes arranged along the circumferential direction on the second rotation shaft.

In one embodiment, the quick change sleeve liner has an inwardly projecting collar for urging the steel balls into the second groove.

The beneficial effects are that:

according to the power tool with the additional head, the main body part of the existing power tool is improved in design, so that the power tool is provided with two sets of adapting mechanisms, and the two sets of adapting mechanisms can be respectively adapted to the additional heads with different connecting structures, and therefore functions and application scenes of the power tool are expanded; in addition, on the premise of realizing more functions and stronger applicability, the technical scheme of the utility model does not need to additionally increase an adapter, and the aim of the utility model is realized by designing the existing structure of the main body part, so that the technical scheme is simple and the cost is low.

Drawings

The utility model is further described and illustrated below with reference to the accompanying drawings.

Fig. 1 is a schematic view of a power tool with an additional head according to a preferred embodiment of the present utility model.

Fig. 2 is a cross-sectional view of the power tool body mated with a first type of attachment head.

Fig. 3 is a schematic view of the locking mechanism and the first limiting mechanism of the power tool body of fig. 2.

Fig. 4 is a schematic view of the first stop mechanism and the positioning flange of the first type of attachment head in fig. 2.

Fig. 5 is a schematic view of the power output shaft of the power tool body of fig. 2 mated with a first rotary shaft of a first type of attachment head.

Fig. 6 is a cross-sectional view of a power tool body mated with a second type of additional head.

Fig. 7 is an exploded view of a second type of additional head.

Fig. 8 is a schematic view of the second type of attachment head in a locked state.

Fig. 9 is a schematic view of the second type of attachment head in an unlocked state.

Reference numerals:

100. a power tool; 1. a main body; 2. a plurality of additional heads; 10. a housing; 11. a motor; 12. a gear box; 13. a power output shaft; 15. a locking mechanism; 16. a first limiting mechanism; 17. a second limiting mechanism; 21. a first-kind additional header; 22. a second type of additional header; 121. a convex column; 131. a blind hole; 151. a locking button; 152. a spring; 160. a first groove; 170. a second groove; 210. a first type of additional head housing; 211. a first rotation shaft; 212. positioning a flange; 220. a second type of additional head housing; 221. quick-change sleeve; 222. a quick-change sleeve liner; 223. a plurality of steel balls; 224. a return spring; 225. a second rotation shaft; 1310. the output shaft is convex; 1511. a spring accommodating hole; 1512. a latch hook; 2100. edges; 2110. a rotation shaft groove; 2120. a protrusion; 2221. a convex ring; 2222. an inclined plane; 2251. a hole of the second rotation shaft; 2252. and a round hole.

Detailed Description

The technical solution of the present utility model will be more clearly and completely explained by the description of the preferred embodiments of the present utility model with reference to the accompanying drawings.

The utility model provides a power tool with an additional head, which comprises a main body and a plurality of additional heads, wherein the plurality of additional heads are selectively matched with the main body, the main body comprises a shell, a motor and a power output shaft, the plurality of additional heads comprise a first type of additional heads and a second type of additional heads which are of different structures, the main body further comprises a first adapting mechanism and a second adapting mechanism, the first type of additional heads are mounted on the main body through the first adapting mechanism, the second type of additional heads are mounted on the main body through the second adapting mechanism, the first adapting mechanism comprises a locking mechanism used for locking the first type of additional heads and a first limiting mechanism used for limiting the first type of additional heads to move circumferentially relative to the main body, and the second adapting mechanism comprises a second limiting mechanism used for limiting the second type of additional heads to move relative to the main body, and the second limiting mechanism is arranged on the power output shaft.

The power tool with the additional head is provided with the first adapting mechanism and the second adapting mechanism which are respectively adapted to the first type of additional head and the second type of additional head with different structures, so that the main body of the power tool can be connected with the additional heads with different structures.

As shown in the preferred embodiment of fig. 1, the power tool 100 with the additional head includes a main body 1 and a plurality of additional heads 2, and the plurality of additional heads 2 can be selectively adapted to the main body 1 so that the power tool 100 has different functions and can perform different operations. The plurality of additional heads 2 in fig. 1 include eccentric heads, right angle screwdriver heads, bottle openers, air blowers, scissor heads, torque-adjusting attachment heads, drills. The utility model is not limited to the type of additional head shown in fig. 1, but may include other additional heads in other embodiments. The plurality of additional heads 2 have different structures because they realize different functions and have different movement modes, and the plurality of additional heads 2 may be divided into a first type of additional head 21 and a second type of additional head 22 according to the connection structure of the additional heads 2 with the main body 1, and the first type of additional head 21 and the second type of additional head 22 have different connection structures with the main body 1.

As shown in fig. 2, the main body 1 of the power tool 100 includes a housing 10, a motor 11, a gear box 12, and a power output shaft 13, the motor 11 transmits power to the power output shaft 13 through the gear box 12, and the power output shaft 13 is connected with a rotation shaft of the additional head 2, so that the power is transmitted to the additional head 2, and the additional head 2 is driven to move.

The main body 1 of the power tool 100 further includes a first fitting mechanism and a second fitting mechanism for fitting the first-type additional head 21 and the second-type additional head 22, respectively, that is, the first-type additional head 21 is mounted to the main body 1 by the first fitting mechanism, and the second-type additional head 22 is mounted to the main body 1 by the second fitting mechanism. By the arrangement, the power tool 100 of the utility model can not only be adapted to the additional heads with the same connecting structure, but also be adapted to the additional heads with different connecting structures, so that the power tool 100 of the utility model has more functions and can be suitable for more working scenes.

As shown in fig. 2 and 3, the first adapting mechanism includes a locking mechanism 15 for locking the first type of additional head 21 and a first limiting mechanism 16 for limiting the circumferential movement of the first type of additional head 21 relative to the main body 1.

The locking mechanism 15 is engaged with the housing 210 of the first-type attaching head 21, thereby locking the first-type attaching head 21 to the main body 1. Specifically, the locking mechanism 15 includes a pair of locking buttons 151 symmetrically distributed on the outer circumference of the housing 10. The housing 10 has a pair of symmetrically disposed holes at an end adjacent the attachment head 2 for receiving a pair of locking buttons 151. The locking button 151 is provided with a spring receiving hole 1511 for receiving the spring 152. Accordingly, a pair of bosses 121 are provided on the outer circumference of the gear case 12 for mounting the locking button 151. One end of the spring 152 is fitted over the boss 121, and the other end abuts against the hole bottom of the spring receiving hole 1511, thereby mounting the pair of locking buttons 151 on the main body 1. The locking button 151 has a locking hook 1512 on a side facing the attachment head 2, and accordingly, the housing 210 of the first-type attachment head 21 forms an edge 2100 bent inward toward the housing 210 at an end facing the main body 1, and the locking hook 1512 engages with the edge 2100 to hook the edge 2100, thereby locking the first-type attachment head 21 to the main body 1, and in fact, limiting axial movement of the first-type attachment head 21 relative to the main body 1.

A first stopper mechanism 16 for restricting the circumferential movement of the first-kind attaching head 21 with respect to the main body 1 is formed on the gear case 12. Specifically, the first spacing mechanism 16 includes a plurality of first grooves 160 arranged along the circumference of the gear case 12.

As shown in fig. 2 to 5, the first type of attachment head 21 is connected to the main body 1, and in this embodiment, an eccentric head is described as an example. The first-type attaching head 21 includes a first rotation shaft 211 and a positioning flange 212. The power output shaft 13 of the main body 1 is provided with a blind hole 131 at one end facing the additional head 2, an output shaft boss 1310 arranged in the circumferential direction is provided on the wall of the blind hole 131, the first rotary shaft 211 is provided with a plurality of rotary shaft grooves 2110 arranged in the circumferential direction at one end facing the main body 1, and the rotary shaft grooves 2110 are matched with the output shaft boss 1310, so that power transmission between the power output shaft 13 and the first rotary shaft 211 is realized. The positioning flange 212 has a plurality of circumferentially arranged protrusions 2120 on its inner wall for mating with the first recess 160 of the first spacing mechanism 16.

Based on the above structural design, when the first-kind attaching head 21 is fitted to the main body 1, first, the user presses the pair of locking buttons 151 to be in the released state, then, aligns the first rotation shaft 211 with the blind hole 131 and inserts, and simultaneously, aligns the protrusion 2120 with the first groove 160 and pushes the protrusion 2120 into the first groove 160, at this time, the user releases the locking buttons 151 to be restored to the original position, and the locking hooks 1512 of the locking buttons 151 hook the edge 2100, thereby locking the first-kind attaching head 21. Thus, the first type attaching head 21 is attached to the main body 1, and the power output shaft 13 of the main body 1 rotates the first rotary shaft 211, thereby driving the first type attaching head 21 to operate to perform work.

As shown in fig. 6, the second adapting mechanism includes a second limiting mechanism 17 for limiting the movement of the second-kind additional head 22 relative to the main body 1, which is provided on the power output shaft 13, specifically, the second limiting mechanism 17 is a plurality of second grooves 170 formed on the outer wall of the power output shaft 13 and arranged in the circumferential direction, and preferably, the second grooves 170 are spherical grooves.

As shown in fig. 6 and 7, the second type of attachment head 22 is connected to the main body 1, and in this embodiment, a drill is described as an example. The second type of attachment head 22 includes a housing 220, a quick change sleeve 221, a quick change sleeve liner 222, a plurality of steel balls 223, a return spring 224, and a second rotary shaft 225. The quick-change sleeve 221 is movably mounted on the housing 220 for operation by a user to effect assembly and separation of the second type of attachment head 22 from the main body 1. Specifically, the return spring 224 is disposed in the housing 220 and the quick-change sleeve 221, one end of the return spring 224 is disposed in the housing 220, and the other end is disposed in the quick-change sleeve 221, and the return spring 224 applies a spring force to the quick-change sleeve 221 to be located at a position away from the housing 220, and the quick-change sleeve 221 can be moved to a position contacting the housing 220 against the spring force under the action of an external force, so that the quick-change sleeve 221 has two extreme positions and can be moved and switched between the two extreme positions.

The second rotating shaft 225 is provided with a hole 2251 at one end near the main body 1 for cooperation with the outer wall of the power take-off shaft 13 of the main body 1, and a plurality of circular holes 2252 arranged in the circumferential direction thereof at the end for receiving the steel balls 223, the steel balls 223 being movable up and down within the circular holes 2252 but not being separated from the circular holes 2252.

The quick change sleeve liner 222 is mounted in the quick change sleeve 221, and specifically, the quick change sleeve liner can be clamped in the quick change sleeve 221 through ribs on the inner wall of the quick change sleeve 221, and moves together with the quick change sleeve 221. Specifically, the quick-change sleeve liner 222 has an inwardly protruding collar 2221 for pushing the steel ball 223 into the second groove 170 of the power take-off shaft 13, and the collar 2221 transitions with the body of the quick-change sleeve liner 222 through the inclined surface 2222 so as to better push the steel ball 223.

As shown in fig. 8, when the second type attaching head 22 is fitted to the main body 1, the user aligns the second rotation shaft 225 with the power output shaft 13 and is sleeved on the power output shaft 13, and at this time, since the quick-change sleeve 221 is located away from the outer shell 220 under the action of the spring force, in this position, the convex ring 2221 of the quick-change sleeve liner 222 contacts with the steel balls 223, so that the steel balls 223 are pushed into the second groove 170, and the second type attaching head 22 is fitted to the main body 1. The quick change sleeve 221 is held in this position by the spring force, which is the locked position of the quick change sleeve 221. In this assembled state, when the power output shaft 13 rotates, it drives the steel ball 223 through the second groove 170, and the steel ball 223 is locked in the axial and circumferential directions at the same time as being supported by the quick-change sleeve liner 222 and cannot be ejected, so that the second rotating shaft 225 is driven to rotate synchronously.

As shown in fig. 9, when the second type of attachment head 22 is detached from the main body 1, the user applies a force to the quick change sleeve 221, pushing the quick change sleeve 221 toward the front end of the second type of attachment head 22 against the spring force, thereby displacing the quick change sleeve 221 and the quick change sleeve liner 222 fixed thereto toward the outer shell 220, and moving the quick change sleeve liner 222 to a position out of the steel balls 223, which is an unlocked position of the quick change sleeve 221. At this time, the user activates the power tool so that the power output shaft 13 rotates, the non-recessed portion of the power output shaft 13 ejects the steel ball 223, the steel ball 223 is ejected outward by the pushing force, and leaves the second groove 170, so far, the second type attaching head 22 is separated from the main body 1.

Based on the structural design, the power tool main body can be matched with the additional heads with different structures, so that the functions and the application scene of the power tool are expanded, and on the other hand, when the functions of adapting the additional heads with different structures are realized, an additional adapter is not required to be added, and the main body structure of the existing power tool is utilized to carry out improved design on the main body structure so that the main body structure is provided with different adapting mechanisms to adapt the additional heads with different structures.

The above detailed description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Various modifications, substitutions and improvements of the technical scheme of the present utility model will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the utility model. The scope of the utility model is defined by the claims.

Claims (10)

1. A power tool with additional heads comprising a body, and a plurality of additional heads selectively adapted to the body, the body comprising a housing, a motor, a power take-off shaft, the plurality of additional heads comprising a first type of additional head and a second type of additional head having different configurations, characterized by:

the main body further includes a first fitting mechanism by which the first-kind additional head is mounted to the main body, and a second fitting mechanism by which the second-kind additional head is mounted to the main body;

the first adapting mechanism comprises a locking mechanism for locking the first type of additional head and a first limiting mechanism for limiting the circumferential movement of the first type of additional head relative to the main body,

the second adapting mechanism comprises a second limiting mechanism for limiting the movement of the second type of additional head relative to the main body, and the second limiting mechanism is arranged on the power output shaft.

2. The power tool with additional head according to claim 1, wherein the first additional head comprises a first rotary shaft, the second additional head comprises a second rotary shaft, the power output shaft is provided with a blind hole at one end facing the additional head, the first rotary shaft is matched with the blind hole, and the second rotary shaft is matched with the outer wall of the power output shaft.

3. The power tool with additional head according to claim 2, wherein the locking mechanism cooperates with the housing of the first type of additional head, and the first limiting mechanism includes a plurality of first grooves arranged in a circumferential direction.

4. The power tool with additional head as recited in claim 3, wherein said main body further includes a gear box, said locking mechanism being mounted to said gear box by a spring, said first limit mechanism being formed on said gear box.

5. The power tool with an additional head according to claim 4, wherein said locking mechanism includes a pair of locking buttons having locking hooks on a side facing said additional head, said housing of the first type of additional head forming an inwardly curved edge at an end facing said main body, said locking hooks being engaged with said edge.

6. The power tool with additional head according to claim 5, wherein the first type of additional head comprises a positioning flange having a plurality of circumferentially arranged protrusions on an inner wall thereof, the protrusions being engaged with the first grooves of the first limiting mechanism.

7. The power tool with additional head as recited in claim 2, wherein said second spacing means includes a plurality of second grooves formed on an outer wall of said power take-off shaft and circumferentially arranged.

8. The power tool with additional head according to claim 7, wherein the second type of additional head includes a quick change sleeve, a quick change sleeve liner, a plurality of steel balls engaged with the second groove, and a return spring acting on the quick change sleeve, the quick change sleeve liner being mounted in the quick change sleeve and being displaceable together with the quick change sleeve under the action of the return spring and acting on the steel balls.

9. The power tool with additional head according to claim 8, wherein the steel balls are provided in holes arranged in a circumferential direction on the second rotation shaft.

10. The power tool with additional head according to claim 9, wherein said quick change sleeve liner has an inwardly projecting collar for urging said steel balls into said second recess.