CN212578534U - Head and body quick-change structure of multifunctional power tool and multifunctional power tool - Google Patents

Abstract

The utility model discloses a head and body quick-change structure of a multifunctional power tool and the multifunctional power tool, wherein the quick-change structure comprises a machine body shell; the torsion ring is arranged beside the socket in the shell of the machine body in a rotating way, and the axis of the torsion ring is at least parallel to the axis of the socket; the machine head is detachably inserted into the insertion hole of the torsion ring; the energy storage device drives the torsion ring to reset after autorotation; the machine head locking block can linearly move between a first position and a second position along the direction vertical to the axis of the torsion ring in the self-rotation process of the torsion ring; at the first position, the machine head locking block is provided with a blocking part which extends into the jack of the torsion ring and is positioned on the moving path of the clamping table at the side wall of the machine head; in the second position, the head lock block does not have a portion located on the moving path of the chuck. This scheme adopts rotation type unlocking structure to replace the push type structure, and the required power of exerting of staff is littleer during the unblock, the easy operation to adopt the face contact locking, stability is good, can reduce the vibration of during operation.

Description

Head and body quick-change structure of multifunctional power tool and multifunctional power tool

Technical Field

The utility model belongs to the technical field of power tool and specifically relates to multi-functional power tool's head and body quick change structure and multi-functional power tool.

Background

The hand-held tool controls the start and stop of the motor through the start-stop button, so that the torque of the motor is transmitted to parts such as a drill bit, a saw, a grinding disc, a hammer and the like through a certain torque transmission structure, and the drill bit, the saw, a rotary disc and the like can rotate, stretch in and out in a reciprocating mode or shake.

As the kinds of functions of the hand-held tools become more and more abundant, users generally need to purchase the hand-held tools with corresponding functions respectively to meet certain use requirements, which increases the use cost of the users, and in view of that the driving structures of the hand-held tools are basically similar, a structure which can be detachably assembled with a plurality of different types of tool holders through one driving structure appears, and the structure realizes the fixation of the tool holders through the contraction of an elastic clamping hoop fixed on the shell and the embedding of the elastic clamping hoop into a clamping groove on the tool holders; when the tool rest is detached, the elastic clamp is driven by pressing a button on the shell to expand and withdraw from a clamping groove in the tool rest, so that the tool rest can be taken out by removing the limit on the tool rest.

However, in such a structure, a large force is required to expand the elastic band to withdraw the elastic band from the clip groove, the requirement for the finger force of a user is high, and inconvenience is caused to users such as women.

In addition, the elastic clamp is a metal wire or a metal sheet, the elastic clamp is often in line contact with the tool rest, the contact area is small, the tolerance is small, the stability of fixation is relatively weak, and the tool rest vibrates to a certain extent during working to influence the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multi-functional power tool's head and body quick change structure and multi-functional power tool in order to solve the above-mentioned problem that exists among the prior art.

The purpose of the utility model is realized through the following technical scheme:

a head and body quick-change structure of a multifunctional power tool comprises

A fuselage shell;

the torsion ring is arranged in the fuselage shell in a rotatable manner and is positioned beside the socket of the fuselage shell, and the axis of the torsion ring is at least parallel to the axis of the socket;

the machine head is detachably inserted into the jack of the torsion ring;

the energy storage device drives the torsion ring to reset after autorotation;

the handpiece locking block can linearly move between a first position and a second position along the direction vertical to the axis of the torsion ring in the self-rotation process of the torsion ring;

at a first position, having a blocking portion located on a moving path of a chuck of the handpiece within the receptacle;

in the second position, the head lock block does not have a portion located on the moving path of the chuck.

Preferably, in the head and body quick-change structure of the multifunctional power tool, an operation panel is arranged on the outer circumferential surface of the torsion ring.

Preferably, in the head and body quick-change structure of the multifunctional power tool, the operating plate and the torsion ring are integrally formed or detachably assembled, and a boss at least extending into an arc-shaped hole in the body shell is formed on the outer surface of the operating plate.

Preferably, in the head and body quick-change structure of the multifunctional power tool, an arc-shaped through hole for mounting the head lock block is formed in the torsion ring, and the sum of the thickness of the outer part of the arc-shaped through hole and the thickness of the head lock block is consistent with the width of the clamping groove in the head.

Preferably, in the head and body quick-change structure of the multifunctional power tool, the head lock block is provided with an arc-shaped hole or an inclined hole, a driving pin which is parallel to the axis of the torsion ring and is located on the torsion ring is inserted into the arc-shaped hole or the inclined hole, and the driving pin drives the head lock block to move between the first position and the second position in the rotation process of the torsion ring.

Preferably, in the head and body quick-change structure of the multifunctional power tool, a guide block is arranged in the machine body shell and is close to two opposite end faces of the machine head locking block.

Preferably, in the head-body quick-change structure of the multifunctional power tool, a guide sleeve is coaxially arranged in the body shell and is coaxial with the torsion ring, and the head is provided with a guide hole matched with the guide sleeve.

Preferably, in the head and body quick-change structure of the multifunctional power tool, a fixing plate coaxial with the torsion ring is arranged in the machine body shell, and the distance between the fixing plate and the machine head locking block is equal to the width of the clamping table.

Preferably, in the head body quick-change structure of the multifunctional power tool, an inclined plane inclined from the inner end to the outer end of the clamping table is formed on the clamping table, and the head locking block is provided with a chamfer matched with the inclined plane.

Preferably, in the head and body quick-change structure of the multifunctional power tool, at least one pair of the head locking blocks is provided, and four chamfers are provided.

Preferably, in the head and body quick-change structure of the multifunctional power tool, the body housing is provided with a steering switching key, the socket of the body housing is provided with a steering switching locking member, the steering switching locking member can be driven to linearly move between a third position and a fourth position,

it has no limit to the movement of the steering switch key at the third position;

in the fourth position, the steering key is restricted from being in the forward or reverse position or from being in the lock-out position and can be moved only to one side.

A multifunctional power tool comprises a head and body quick-change structure of any one of the multifunctional power tools.

The utility model discloses technical scheme's advantage mainly embodies:

this scheme design is exquisite, thereby adopts the rotation of turning round the change ring to drive aircraft nose locking piece rectilinear movement and realize the locking and the unblock of aircraft nose and fuselage shell, adopts rotation type unblock structure to replace the push type structure, and the rotation type structure is for the push type structure, and the required power of exerting of staff is littleer during the unblock, easy operation to the locking of this scheme by the aircraft nose locking piece with the card mesa contact of aircraft nose realizes, and the stability of locking is good, can reduce the vibration of during operation.

The structural design of this scheme drive aircraft nose locking piece rectilinear movement is ingenious, simple and easy to the whole positional relationship design of aircraft nose, torsion ring, aircraft nose locking piece and fixed plate can be through the injecing to a plurality of terminal surfaces of aircraft nose, thereby guarantees the reliability of aircraft nose locking, increases the holding power to the aircraft nose simultaneously, reduces the aircraft nose vibration.

The guide sleeve, the guide block and the fixed plate are integrally formed, the machine head is directly guided through the square hole of the machine head and the guide sleeve, the whole structure is compact, parts are few, and industrialization is easy to realize and popularize and apply.

This scheme is through forming the inclined plane of matching on aircraft nose and aircraft nose locking piece, only need during the equipment the disect insertion aircraft nose can, need not rotate the change-over ring, further reduced the operation degree of difficulty, improved the convenience of use.

The structural design of the steering switching key and the steering switching locking piece can effectively meet the function of realizing one-way operation after the machine head is assembled, the motor steering is not required to be manually readjusted, and the risk of misoperation or forgetting operation is effectively avoided.

Drawings

Fig. 1 is a front view of a power tool of the present invention, taken as an example of an electric drill;

fig. 2 is a partially exploded view of the quick-change structure of the head and body according to the present invention (the half portion on the right side of the body housing and the partial structure of the front end of the head are hidden in the drawing);

FIG. 3 is a side sectional view showing an assembled state of the quick-change head/body structure of the present invention (a partial structure of the body housing and a partial structure of the head front end are not shown in the figure)

FIG. 4 is an enlarged view of area A of FIG. 3;

fig. 5 is an exploded perspective view of the quick-change structure of the head and body according to the present invention (the half portion on the right side of the body housing and the partial structure of the front end of the head are hidden in the figure);

fig. 6 is a top view of the torsion ring of the present invention;

fig. 7 is an end sectional view showing an assembled state of the head-body quick-change structure according to the present invention (a partial structure of the body housing and a partial structure of the head front end are hidden in the drawing);

FIG. 8 is an enlarged view of the quick change head area of FIG. 7;

FIG. 9 is a top view of the head lock block, the driving pin, the guide block, the guide sleeve and the fixing plate of the present invention in an assembled state;

fig. 10 is a schematic view of the automatic locking structure of the connector and the mechanism locking block of the present invention;

fig. 11 is a schematic view of the steering switch key and steering switch lock of the present invention on the body housing;

fig. 12 is a front view of the steering switch key and the steering switch lock member of the present invention;

fig. 13 is a plan view of the steering switch key and the steering switch lock member of the present invention;

fig. 14 is a plan view of the steering switch lock member of the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

The head and body quick-change structure of the multifunctional power tool disclosed by the present invention is explained with reference to the accompanying drawings, as shown in fig. 1 and fig. 2, the multifunctional power tool includes a body housing 100, the body housing 100 is used for providing an installation space and a holding space required for manual operation, and the like, and the shape of the body housing 100 may refer to the shape of various existing hand tools, for example, the shape may be the housing shape of a gun-shaped electric drill or the housing shape of a pen-shaped electric drill. Using a gun-shaped electric drill as an example, the body housing 100 may be a structure that has a cavity and has an one end socket inside that two symmetrical halves (only the structure of the left half is shown in the drawing) are combined, and it includes a holding portion and an installation portion that are used for the staff to hold, installation portion department is formed with an approximately circular inner chamber, and the front end of installation portion forms socket 120.

As shown in fig. 1 and 2, a nose 300 is detachably connected to the socket 120 of the body housing 100, and when the nose 300 and the body housing 100 are assembled into a whole, a power source (motor) in the body housing 100 and a power transmission structure in the nose 300 can be connected and output power of the power source to a working head for working, so that the power of the power source in the body housing 100 can be output through the nose 300 to implement operations such as drilling, hammering, shearing, and the like.

Since the head 300 has various types according to different functions, for example, a head of an electric drill, a head of a reciprocating saw, a head of an electric hammer, or the like, it is necessary to replace the head 300 according to different use requirements at the time of actual use. For convenience of replacement, a certain quick-change structure needs to be arranged between the handpiece 300 and the fuselage housing 100, and a preferred implementation manner and a principle of the quick-change structure will be described in detail below.

First, as shown in fig. 2, the housing 310 of the handpiece 300 with different functions includes a connector 311, the connector 311 includes a square sleeve part 312 and a position-limiting part 313, the outer contour of the sleeve part 312 is preferably square, and the center of the sleeve part 312 is a square hole. At least one side wall 3122 of the socket part 312 is formed with a boss 3121 extended from an inner end thereof (an end facing a socket of the body housing when assembled) to an outer end thereof by a certain distance, and preferably, the four side walls 3122 are formed with the boss 3121, and outer circumferences of the four bosses 3121 are combined into a circular profile, thereby preventing interference with rotation of the torsion ring 200; a clamping groove 314 is formed between the clamping table 3121 and the inner end surface of the limiting portion 313.

As shown in fig. 3 and 4, when the machine head 300 needs to be locked in the machine body housing 100, at least one machine head lock block 500 in the machine body housing 100 is inserted into the clamping groove 314 and is attached to the outer end surface (the end surface facing the position-limiting portion 313) of the clamping table 3121, at this time, the machine head lock block 500 blocks the movement of the clamping table 3121, so as to limit the machine head 300 from being removed from the machine body housing 100; when the handpiece 300 needs to be removed, the handpiece lock block 500 is removed from the clamping groove 314, so that the limitation of the handpiece 300 by the handpiece lock block 500 on the movement of the handpiece 300 can be removed, and the handpiece 300 can be pulled out from the housing 100.

As shown in fig. 2, 3 and 5, a torsion ring 200 is rotatably disposed in the body housing 100, an axis of the torsion ring 200 is at least parallel to an axis of the socket of the body housing 100, and the torsion ring 200 can rotate around its axis relative to the body housing 100 under the action of an external force.

As shown in fig. 4 to 6, the outer contour of the body 230 of the torsion ring 200 is approximately circular, the center thereof has a circular insertion hole 220, the outer circumferential surface 210 thereof is formed with at least one arc through hole 240, preferably, the arc through holes 240 are symmetrically arranged, the arc length thereof is slightly smaller than the semicircular arc length of the body 230, the inner wall of the body housing 100 is formed with two guide plates 130 having a distance corresponding to the thickness of the torsion ring 200, and they constitute a guide groove to define the position of the torsion ring 200. And the sum of the thicknesses of the outer part 250 positioned outside the arc-shaped through hole 240 and the handpiece lock block 500 is equivalent to the width of the clamping groove 314, so that the handpiece 300 can be effectively limited.

In order to facilitate manual rotation of the torsion ring 200, as shown in fig. 7, an operation plate 700 is disposed at the outer circumferential surface 210 of the torsion ring 200, and the number of the operation plates 700 may be one, or two or more, as shown in fig. 8, and preferably two, and two of the operation plates 700 are located between two of the arc-shaped through holes 240. Each of the operation panels 700 includes an arc-shaped main body 720, the arc-shaped main body 720 and the outer circumferential surface of the torsion ring 200 may be integrally formed or may be assembled, and when integrally formed, a reinforcement portion 730 is formed between the arc-shaped main body 720 and the torsion ring 200. When assembled, the inner wall of the arc-shaped body or the outer circumferential surface 210 of the torsion ring 200 is formed with insertion blocks or insertion grooves that are matched with each other.

As shown in fig. 5 and 8, a boss 710 is formed at an outer surface of the arc-shaped main body 720, the boss 710 is located at a middle portion of the arc-shaped main body 720, the boss 710 is at least embedded into the arc-shaped hole 110 of the machine body casing 100, the size of the arc-shaped hole 110 is smaller than that of the arc-shaped main body 720, the boss 710 is movable in the arc-shaped hole 110, when the boss 710 is located at one end of the arc-shaped hole 110, the machine head lock block 500 can lock the machine head 300, and when the boss 710 is moved to the other end of the arc-shaped hole 110, the machine head lock block 500 does not lock the machine head 300.

As shown in fig. 8, preferably, the surface of the boss 710 is approximately flush with the outer surface of the body housing 100, and a row of parallel grooves 711 is formed, and the grooves 711 can increase friction force for convenient operation by human hands; meanwhile, the surface of the boss 710 is formed with a rib 712 at one end thereof, and the rib 712 protrudes outside the surface of the body housing 100, so that the position of the fingers of the operator can be effectively limited, and the operation difficulty can be reduced.

Since it is necessary to allow the torsion ring 200 to be reset after the torsion ring 200 is manually rotated by the operation panel 700, as shown in fig. 7, the torsion ring 200 is further connected to an energy storage means 400 for driving the torsion ring to be reset after the rotation, the energy storage means 400 can store energy by being deformed when the torsion ring 200 is manually rotated, and the energy storage means 400 releases the stored energy to rotationally reset the torsion ring 200 when the external force applied to the torsion ring 200 by a human hand is removed.

The energy storage device 400 may be various elastic members with elastic deformation capability, such as a spring, a torsion spring, a spring plate, and the like, and a common spring in this embodiment is described as an example: as shown in fig. 6, the inner portion 260 inside the arc-shaped through hole 240 of the torsion ring 200 has two notches 270 located between the two operation plates 700 and maintaining a gap, a protruding point 290 is formed at a side surface of the partition 280 between the two notches 270, one end of the spring is sleeved on an outer circumference of the protruding point 290, the other end of the spring is fixed or abutted on the support structure 140 in the fuselage housing 100, and the support structure 140 may be a groove or a protruding point.

As shown in fig. 7 and 8, at least one handpiece lock block 500 is linearly movably disposed on the torsion ring 200 in a direction perpendicular to the axial direction thereof, preferably, the two handpiece lock blocks 500 are symmetrically disposed in the arc-shaped through hole 240 between the two operation plates 700, and the thickness of the handpiece lock block 500 is equivalent to the width of the arc-shaped through hole 240. The head lock 500 is a rectangular block having a curved surface facing the inner wall of the housing 100.

As shown in fig. 7 and 8, a driving pin 800 parallel to the axis of the torsion ring 200 is further disposed in the arc through hole 240, the driving pin 800 penetrates through an inclined hole or an arc hole disposed on the handpiece lock block 500, and is illustrated by taking an arc hole 520 as an example, a first end 521 of the arc hole 520 is close to the arc surface of the top of the handpiece lock block, a second end 522 of the arc hole is close to the bottom surface of the handpiece lock block 500 opposite to the arc surface, and the driving pin 800 drives the handpiece lock block 500 to move linearly between the first position and the second position during the rotation of the torsion ring 200.

In the first position, as shown in fig. 4 and 8, the driving pin 800 is located at the first end of the arc-shaped hole 520, the handpiece lock block 500 has a blocking portion 510 extending into the insertion hole 220 of the torsion ring 200 and located on the moving path of the card table 3121 of the handpiece 300, where the moving path of the card table 3121 refers to the moving track of the card table 311 inside the handpiece housing when the handpiece 300 is inserted into the handpiece housing from the insertion opening of the handpiece housing 100 or pulled out of the insertion opening from the handpiece housing.

As shown in fig. 4, if the handpiece 300 is plugged into the plug hole 220 of the torsion ring 200, the blocking portion 510 can be inserted into the plug groove 314 of the handpiece 300, while the inner end surface of the blocking portion 510 abuts against the outer end surface of the stop 3121, and at the same time, the outer end surface 251 of the outer portion 250 of the torsion ring 200 abuts against or abuts against the inner end surface 3131 of the stopper 313, so that the blocking portion 510 can limit the stop 3121, thereby confining the handpiece 300 in the housing 100.

When the torsion ring 200 rotates clockwise, the driving pin 800 is driven to rotate clockwise and move from the first end to the second end of the arc-shaped hole 520, and since the handpiece lock block 500 can only move in a linear direction, the handpiece lock block 500 is lifted up to move to the second position during the rotation of the driving pin 800.

In the second position, the head lock block 500 does not have a portion located on the moving path of the latch 3121, and preferably, the blocking portion 510 is withdrawn from the insertion hole 220 of the torsion ring 200, which does not restrict the movement of the latch 3121 on the head 300.

In order to ensure the linear movement of the handpiece lock block 500, as shown in fig. 8 and 9, a guide block 900 is disposed in the housing 100 and is close to two opposite end faces 530 of each handpiece lock block 500, the two end faces 530 of the handpiece lock block 500 are planes parallel to the symmetry axis 150 of the housing 100, the guide block 900 extends from one side of the two notches 270 of the torsion ring 200 to the other side, and the end faces of the two notches toward the handpiece lock block 500 are matching planes, and when the handpiece lock block 500 moves, the two guide blocks 900 limit the direction of the handpiece lock block 500.

In order to guide the handpiece 300 during assembly, as shown in fig. 8 and 9, a guide sleeve 1000 coaxial with the drive ring 200 is arranged in the body housing 100, the guide sleeve 1000 extends from the inner end of the torsion ring 200 to the insertion hole of the torsion ring 200, and the outer contour of the guide sleeve 1000 can be in various feasible polygonal shapes, preferably quadrangular shapes, and is matched with the shape and size of the socket part 312 of the handpiece 300. When assembled, the guide sleeve 1000 is coaxially inserted into the socket 312.

Further, as shown in fig. 9, the guide sleeve 1000 and the guide block 900 are located on the same fixing plate 600, the fixing plate 600 is fixed in the body housing 100, and may also be used to fix a motor, and a hole for passing a motor shaft or a spline connected to the motor shaft is formed in the center of the fixing plate 600. As shown in fig. 5, the distance between the outer end surface (the end surface facing to the head lock block) of the fixing plate 600 and the inner end surface 540 of the head lock block 500 is equal to the width of the clamping table 3121, so that the clamping table 3121 can be effectively limited between the fixing plate 600 and the head lock block 500 to ensure the stability of locking.

When the assembly is performed under the above structure, the torsion ring 200 needs to be manually driven to rotate, so that the handpiece lock block 500 is not located on the traveling path of the clamping table 3121 of the handpiece 300, and the handpiece 300 can be inserted into the body housing 100 for assembly, which is obviously inconvenient for the assembly operation.

Accordingly, in a preferred mode, as shown in fig. 10, a slope 3123 inclined from an inner end to an outer side of an outer end is formed on a part or all of the lands 3121 of the head 300, and the head lock block 500 has a chamfer matching with the slope 3123. Further, an included angle a between the inclined surface 3123 and the side wall 3122 where the blocking table 3121 is greater than an included angle b between the inclined surface 550 and the side wall 3122 corresponding to the chamfer.

Therefore, when the handpiece 300 moves into the torsion ring 200, the inclined surface 3123 contacts the inclined surface 550 and drives the handpiece lock block 500 to move away from the axial center of the torsion ring 200, that is, the handpiece lock block 500 moves from the first position to the second position, and simultaneously, the torsion ring 200 rotates to apply pressure to the energy storage device 400 to enable the energy storage device 400 to deform and store energy.

As the handpiece 300 continues to move into the housing 100, the handpiece lock block 500 moves to the top of the inclined surface 3123 (the distance from the side wall 3122 where the clamping table 3121 is located is the largest), and then, when the clamping table 3121 moves to the inner side of the handpiece lock block 500, the clamping table 3121 no longer provides a supporting force for the handpiece lock block 500, so that the energy storage device 400 releases the stored energy, drives the torsion ring 200 to rotate in the opposite direction and drives the handpiece lock block 500 to move in the axial direction of the torsion ring 200, that is, the handpiece lock block 500 moves from the second position to the first position, at this time, the handpiece lock block 500 and the clamping table 3121 have a coinciding portion and the handpiece lock block 500 is located at the outer side of the clamping table 3121, thereby confining the handpiece 300 in the housing 100.

The scheme further discloses a multifunctional power tool, as shown in the attached drawings 1 and 2, and the multifunctional power tool comprises the head and body quick-change structure. The machine body shell 100 is internally provided with a motor 4000, a transmission structure (marked in the figure), a control panel and other structures of conventional power tools. The body housing 100 is provided with a start key 6000 protruding out of the body housing 100 to control the start and stop of the motor 4000 and a steering switch key 2000 protruding out of the housing body at two ends to control the forward rotation, the reverse rotation and the locking of the motor 4000, and generally, when the steering switch key 2000 is located at a middle position (locking position), the hand tool is locked, and the start key 6000 cannot control the motor to rotate; when the steering switch key 2000 is located at the left side position (forward rotation position), the start key 6000 can control the motor to rotate forward; when the steering switch 2000 is in the right position (reverse position), the start key controls the motor to rotate in the reverse direction. The entire hand tool may be powered by known mains power connections and/or by battery power. The above-mentioned structures of the motor 4000, the control panel, the start key 6000, the steering switch key 2000 and the power supply are all conventional configurations of various handheld tools, which are not the design points of the present solution, and are not described herein again.

Further, other structures of a conventional hand tool, such as a torque transmission structure, a clutch mechanism, a torque adjustment mechanism, a lighting lamp, etc., may be disposed on or in the body housing 100.

The handpiece 300 can be any known handpiece with various functions, and a transmission structure which can be connected with a motor 4000 is arranged in the handpiece 300, so that the torque of the motor is transmitted to a working head arranged on the handpiece 300, such as a drill bit, a reciprocating saw blade, a grinding disc, a punch and the like, and the working head is driven to rotate or reciprocate and the like.

A torque output structure capable of being directly or indirectly connected with a motor and transmitting torque is provided in the head 300 having different functions, for example, as shown in fig. 2, a rotating shaft of the motor 4000 is coaxially connected with a spline 5000, an output shaft 7000 is coaxially and rotatably provided in the head 300, and when the head 300 is fixed in the main housing, the spline 5000 coaxially fixed on the rotating shaft of the motor 4000 is inserted into a spline groove formed at an inner end surface of the output shaft 7000, thereby realizing power transmission. And the torque output structure can change the rotation motion of the motor into reciprocating linear motion or swing motion and other forms for output, and the corresponding structures are known technologies, which are not the design points of the scheme and are not described herein. Of course, the connection structure of the torque output structure and the motor in the handpiece 300 can also refer to the torque output structures disclosed in the prior art with application numbers 981185789, 991005600, 011119624, 2007200359081, and the like.

Since part of the head 300, for example, a tool rest functioning as a polisher, a circular saw, etc., is assembled to the body housing 100 and is connected to the motor torque transmission, only one direction of rotation of the motor is required, and accordingly, a certain steering control mechanism is required to achieve the above object.

Specifically, as shown in fig. 11, the steering control mechanism includes a steering switch key 2000 disposed on the body housing 100, a steering switch locking member 3000 disposed at the socket of the body housing 100, the steering switch locking member 3000 being driven by an elastic member 9000 to return after moving, the steering switch locking member 3000 being driven to move linearly between a third position and a fourth position,

it does not limit the movement of the steering switch key 2000 at the third position;

in the fourth position, the steering key 2000 is restricted from being located in the forward or reverse position or in the locked position and can be moved only to one side.

As shown in fig. 11, the steering switch locking member 3000 is located at the socket where the body housing 100 is butted with different tool holders, and the body housing 100 is provided with a guiding structure for guiding the steering switch locking member 3000, for example, a set of positioning notches or a positioning groove is provided on the inner wall of the body housing 100 to ensure that the steering switch locking member 3000 can move back and forth along the direction parallel to the axis of the torsion ring.

As shown in fig. 12, the steering switching lock 3000 includes a main plate 3100 and a blocking portion 3200 on a bottom surface thereof, the main plate 3100 includes a front end plate 3110 and a rear end plate 3120, a bent portion 3130 is formed at a distal end of the rear end plate 3120, and the blocking portion 3200 is a cylinder, preferably a circular cylinder.

Meanwhile, as shown in fig. 12, the main plate 3100 is held in the third position by an elastic member 9000 abutting against the main plate, and the elastic member 9000 may be an elastic member which deforms when pressed and automatically returns when the pressure is removed, such as a spring, a metal leaf spring, or the like, or even a sponge or the like, preferably a spring, which is sleeved on the periphery of the rear end plate 3120, and has one end abutting against the stepped surface of the front end of the rear end plate 3120 and the other end abutting against the baffle 150 formed on the inner wall of the body housing 100. So that the front end of the main plate 3100 can move towards the inside of the shell when stressed; when the external force is removed, the elastic member 9000 moves and resets the main plate 3100.

As shown in fig. 12 and 13, during the movement of the main plate 3100, the blocking portion 3200 thereon defines the movement range of the steering switching lock 2000 or drives the steering switching lock 2000 to move to a fixed position. Correspondingly, the steering switch lock 2000 has a structure corresponding to the blocking portion 3200, as shown in fig. 12 and 14, the steering switch lock 2000 at least includes a first blocking plate 2100 perpendicular to the axis X of the steering switch lock 2000, when the steering switch lock 2000 is at the middle position, the first blocking plate 2100 is located at one side (shown as the left side in the drawing) of the blocking portion 3200, when the steering switch lock 3000 is at the first position, that is, when the elastic member 9000 is in the natural state, the blocking portion 3200 is not in contact with the first blocking plate 2100 of the steering switch lock 2000 at the middle position, and the first blocking plate 2100 and the blocking portion 3200 are completely dislocated, that is, the blocking portion 3200 is not located on the moving path of the first blocking plate 2100, so that the first blocking plate 2100 can move freely.

When the steering switching lock 3000 is at the second position, the blocking portion 3200 moves to a moving path of the first shutter 2100, so that the first shutter 2100 defining the steering switching lock 2000 at the middle position moves to one side from the lock position.

Or, the blocking portion 3200 is moved so that the first shutter 2100 for driving the steering switching lock 2000 in the middle position is fixed after being moved from the middle position to a position on one side thereof. At this time, a corresponding inclined surface is required to be provided on the blocking section 3200 so that the first shutter can be driven to move when contacting with the first shutter; of course, in another embodiment, as shown in fig. 12 and 14, the first blocking plate 2100 may be engaged with an inclined plate 2200 that is offset from the blocking portion 3200, and the inclined plate 2200 is located opposite to the blocking portion 3200 when the diverter switch lock 2000 is at the middle position, so that the blocking portion 3200 is in contact with the inclined plate 2200 when moving in the direction parallel to the axis of the torsion ring 200, and the inclined plate 2200 may be driven to finally drive the entire diverter switch lock 2000 to move to one side from the middle position as it is continuously slid inward.

Also, when the steering switching lock 3000 is at the first position, the blocking portion 3200 is not on the moving path of the swash plate 2200, so that it may not restrict the movement of the swash plate 2200, and when the blocking portion 3200 moves on the moving path of the swash plate 2200, it may restrict the movement of the entire steering switching lock 2000; as the blocking portion 3200 is further moved toward the inside of the body housing, the blocking portion 3200 may push the inclined plate 2200 to drive the entire steering switching lock 2000 to move from the middle position to one side. Therefore, this structure can effectively meet the requirements of different tool holders for the corresponding operations, i.e., by moving the blocking portion 3200 by different strokes, it is possible to select between two operating states of the steering switching lock member 2000, in one of which the steering switching lock member 2000 can be moved between the intermediate position and the forward position or between the intermediate position and the reverse position; in another state, the steering switch lock 2000 can only be in the forward or reverse position.

Further, as shown in fig. 12 and 14, the inner end of the first shutter 2100 is engaged with a second shutter 2300 perpendicular thereto, and the second shutter 2300 limits the moving stroke of the steering switching lock 3000, that is, when the blocking portion 3200 abuts against the second shutter 2300, the blocking portion 3200 is limited so that the entire steering switching lock 3000 cannot move any more.

Furthermore, the head 300 of the electric power tool, which only needs the motor to rotate in one direction, is provided with a driving part matched with the steering switching locking member 3000, the driving part is a driving plate corresponding to the main plate 3100, and when the head 300 and the body housing 100 are connected into a whole, the driving part abuts against the main plate 3100 and pushes the main plate 3100 to move into the body housing 100, namely, the main plate 3100 moves from the third position to the fourth position. Preferably, the tool post having the driving part 320 is a circular saw tool post, a grinder tool post, a polisher tool post.

The utility model has a plurality of implementation modes, and all technical schemes formed by adopting equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.

Claims (10)

1. Multi-functional power tool's head and body quick change structure, its characterized in that: comprises that

A fuselage shell (100);

a torsion ring (200) which is arranged in the fuselage shell in a rotatable manner and is close to a socket of the fuselage shell, and the axis of the torsion ring is at least parallel to the axis of the socket;

the handpiece (300) is detachably inserted into the insertion hole (220) of the torsion ring (200);

the energy storage device (400) drives the torsion ring (200) to reset after autorotation;

a head lock (500) linearly movable between a first position and a second position in a direction perpendicular to an axial direction of the torsion ring (200) during rotation of the torsion ring (200);

in a first position, the handpiece lock block (500) has a blocking portion located on a moving path of a chuck of the handpiece (300) within the receptacle (220);

in the second position, the head lock block (500) has no portion located on the moving path of the chuck.

2. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: an operation plate (700) is arranged on the outer circumferential surface of the torsion ring (200).

3. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: an arc-shaped through hole for mounting the machine head locking block (500) is formed in the twisting ring (200), and the sum of the thickness of the outer part of the arc-shaped through hole and the thickness of the machine head locking block (500) is consistent with the width of the clamping groove in the machine head (300).

4. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: the handpiece lock block (500) is provided with an arc-shaped hole or an inclined hole, a driving pin (800) parallel to the axis of the torsion ring is inserted into the arc-shaped hole or the inclined hole, and the driving pin (800) drives the handpiece lock block (500) to move between a first position and a second position in the rotation process of the torsion ring.

5. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: the machine body shell (100) is internally provided with guide blocks (900) which are close to two opposite end faces of the machine head locking block (500).

6. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: a guide sleeve (1000) coaxial with the torsion ring is arranged in the machine body shell (100), and the machine head (300) is provided with a hole matched with the guide sleeve (1000).

7. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: the fixed plate coaxial with the torsion ring is arranged in the machine body shell, and the distance between the fixed plate and the machine head locking block is equal to the width of the clamping table.

8. The multi-functional power tool's head-body quick change structure of claim 1, characterized in that: an inclined plane inclined from the inner end to the outer side of the outer end is formed on the clamping table, and the machine head locking block (500) is provided with a chamfer matched with the inclined plane.

9. The structure for quickly replacing the head and the body of a multifunctional power tool according to any one of claims 1 to 8, wherein: the steering switch key (2000) is arranged on the machine body shell (100), the steering switch locking piece (3000) is arranged at the socket end of the machine body shell (100), the steering switch locking piece (3000) can be driven to linearly move between a third position and a fourth position,

in the third position, there is no limitation to the movement of the steering switch key (2000);

in the fourth position, the steering key is restricted from being in the forward or reverse position or the steering key (2000) is restricted from being in the locked position and can be moved to only one side.

10. Multi-functional power tool, its characterized in that: a quick-change structure of a head and a body comprising the multifunctional power tool as claimed in any one of claims 1 to 9.

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