CN111673145A - Rotary power tool and tool rest connecting structure thereof - Google Patents

Abstract

The invention discloses a tool rest connecting structure of a rotary power tool and the power tool, wherein the tool rest connecting structure comprises a shell; the rotary ring can be arranged in the shell in a self-rotating way; the tool rest is detachably inserted into the central hole of the rotary ring; the energy storage device drives the knob ring to reset after autorotation; the locking block can rotate between a first state and a second state around a supporting shaft parallel to the axis of the knob ring in the rotation process of the knob ring; the locking block is provided with a first part which is at least partially overlapped with the blocking platform of the tool rest inserted in the central hole in a first state; the locking block is in the second state, and the first part is not coincident with the blocking platform. 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 for the push type structure, and the processing ease to the locking of this scheme by the locking block with the face contact of the fender platform of knife rest realizes, and the stability of locking is good, can reduce the vibration of during operation.

Description

Rotary power tool and tool rest connecting structure thereof

Technical Field

The invention relates to the field of electric tools, in particular to a tool rest connecting structure of a rotary power tool and the 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 variety of functions of the hand-held tool is 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 since the driving structures of the hand-held tools are basically similar, a structure which can be detachably assembled with the tool holders of different types through one driving structure appears.

In one arrangement, the tool holder can be removed, for example, by providing a plurality of floating steel balls or pins on the tool holder, providing a stop hole in the torque ring for each of the steel balls or pins, and by inserting a steel ball or pin into the stop hole to lock the tool holder, and by pressing the steel balls or pins to withdraw them from the stop holes during removal. However, in this structure, it is necessary to press a plurality of the steel balls or pins at the same time when the steel balls or pins are removed and attached, which is inconvenient in removing and attaching operations and has low stability of fixing.

In another structure, the tool rest is fixed by contracting an elastic clamp fixed on the shell and embedding the elastic clamp into a clamping groove on the tool rest; 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.

Disclosure of Invention

The present invention is directed to solve the above problems in the prior art, and provides a tool holder connection structure for a rotary power tool and a power tool.

The purpose of the invention is realized by the following technical scheme:

rotary power tool knife rest connection structure, its characterized in that: comprises that

A housing;

the rotary ring can be arranged in the shell in a self-rotating manner;

the tool rest is detachably inserted into the central hole of the rotary ring;

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

the locking block can rotate around a supporting shaft parallel to the axis of the knob ring between a first state and a second state in the rotation process of the knob ring;

the locking block is provided with a first part which is at least partially overlapped with the blocking platform of the tool rest inserted in the central hole in a first state;

and when the locking block is in the second state, the first part is not overlapped with the blocking platform.

Preferably, in the tool holder connection structure of the rotary power tool, an operation plate is disposed on an outer circumferential surface of the rotary ring.

Preferably, in the tool holder connection structure of the rotary power tool, the locking block further includes a second portion extending to an outer side of the rotary ring in the first state, and during rotation of the rotary ring, the second portion cooperates with the driving protrusion on the inner wall of the housing to drive the locking block to switch between the first state and the second state.

Preferably, in the tool holder connection structure of the rotary power tool, the number of the locking blocks is plural, and the first portion of each locking block has a surface that is attached to the side wall of the tool holder.

Preferably, in the tool holder connection structure of the rotary power tool, a guide post coaxial with the knob ring is provided in the housing, and the tool holder has a hole matched with the guide post.

Preferably, in the tool rest connecting structure of the rotary power tool, a blocking disc is arranged in the casing, the axis of the blocking disc is at least parallel to the axis of the rotary ring, and the distance from the blocking disc to the locking block is consistent with the distance from the outer end face of the blocking table to the inner end face of the tool rest.

Preferably, in the tool holder connection structure of the rotary power tool, the thickness of the rotary ring is consistent with the distance from the blocking disc to the limiting surface on the tool holder.

Preferably, in the tool holder connection structure of the rotary power tool, the inner wall of the rotary ring is formed with at least one driven inclined surface inclined from the outer end surface to the inner end surface thereof, and the tool holder has a driving inclined surface matched with the inclined surface.

Preferably, in the tool rest connecting structure of the rotary power tool, the casing is provided with a steering switching key, the socket end of the casing is provided with a steering switching locking piece, the steering switching locking piece can be driven to linearly move between a first position and a second position,

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

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

A power tool comprising any of the aforementioned rotary power tool holder attachment structures.

The technical scheme of the invention has the advantages that:

this scheme design is exquisite, thereby adopts the rotation of knob ring to drive the locking piece and rotate and realize the locking and the unblock of knife rest and knob ring, adopts rotation type unlocking 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 locking piece with the face contact of the fender platform of knife rest realizes, and the stability of locking is good, can reduce the vibration of during operation.

This scheme drive a plurality of locking pieces pivoted structure ingenious, only need to lock the piece with the casing inner wall the shape match design can, need not to increase extra part, simple structure easily realizes.

This scheme adopts a plurality of locking blocks to contact the different positions that keep off the platform of knife rest, and the locking block still laminates with the lateral wall of knife rest simultaneously, can further increase the location to the knife rest, and locking relation each other can also be injectd the removal of knife rest, can reduce the vibration of knife rest during operation.

The design of the overall position relation of the tool rest, the rotary torsion ring, the locking block and the blocking disc can be limited by a plurality of end faces of the tool rest, so that the reliability of the locking of the tool rest is guaranteed, the supporting force of the tool rest is increased, and the vibration of the tool rest is reduced.

The guide post and the baffle disc are integrally formed, the tool rest is directly connected with the guide post in a guiding mode through the insertion part on the tool rest, the whole structure is compact, parts are few, and industrialization realization and popularization and application are easy.

This scheme is through the inclined plane that forms the matching at the inner wall of knife rest and twist ring, only need during the equipment disect insertion the knife rest can, need not rotate the twist 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 tool rest 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 the housing of the present invention (with the right half of the housing hidden)

FIG. 2 is a front view of the housing of the present invention in a separated state from the tool holder (the right half of the housing is hidden in the drawing);

FIG. 3 is a front sectional view of the assembled state of the housing and the tool holder of the present invention;

FIG. 4 is a front view of the handpiece of the present invention;

FIG. 5 is an enlarged view of area A of FIG. 3;

fig. 6 is an end sectional view of the assembled state of the housing and the tool holder of the present invention (the lower half structure of the housing is hidden in the drawing);

FIG. 7 is a front view of the twist ring of the present invention;

FIG. 8 is an enlarged view of area B of FIG. 6;

FIG. 9 is an exploded perspective view of the power tool of the present invention (with the right half of the housing hidden);

FIG. 10 is a front view of the steering switch key and steering switch lock of the present invention;

FIG. 11 is a top view of the steering switch key and steering switch lock of the present invention;

FIG. 12 is a top view of the diverter switch lock of the present invention;

FIG. 13 is a schematic view of the head band drive of the present invention (with the right half of the housing hidden).

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., 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 particular orientation, be constructed and operated in a particular orientation, 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 connection structure of the tool holder of the rotary power tool disclosed by the invention is explained in the following with reference to the attached drawings,

as shown in fig. 1, it includes a housing 100, the housing 100 is used for providing an installation space and a holding space required for manual operation, etc., and the shape of the housing 100 may refer to the shape of various existing hand tools, for example, it may be the shape of a housing of a gun-shaped electric drill or the shape of a housing of a pen-shaped electric drill, etc. Taking a gun-shaped electric drill as an example, the casing 100 may be a structure that is formed by combining two symmetrical halves (only the left half is shown in the figure) and has a cavity inside and a socket at one end, and includes a holding portion and an installation portion for being held by a human hand, an approximately circular inner cavity is formed at the installation portion, and the socket 120 is formed at the front end of the installation portion.

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

Since the tool holder 300 is available in various types according to different functions, for example, a tool holder of an electric drill, a tool holder of a reciprocating saw, a tool holder of an electric hammer, or the like, it is necessary to replace the tool holder 300 according to different needs in actual use. For convenience of replacement, a certain quick-change structure needs to be arranged between the tool holder 300 and the 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. 3 and 4, the housings 310 of the tool holder 300 with different functions all include a connector 311, and the connector 311 includes an insertion portion 312 and a limiting portion 313. The insertion portion 312 is inserted into the central hole 220 of the twist ring 200 when assembled, and is a tubular object whose outer contour is a circular shape having a plurality of grooves. A baffle 3122 is formed at the side wall 3121 of the insertion part 312, the baffle 3122 is preferably a circle, and of course, the baffle 3122 may also be a plurality of annular partition sections arranged at intervals. Meanwhile, a group of grooves 3123 which are uniformly distributed and extend from the inner end of the inserting part 312 to the baffle table 3122 in a straight line are concavely disposed on the side wall 3121 of the inserting part 312. A clamping groove 314 is formed between the blocking table 3122 and the inner end surface of the limiting portion 313, the diameter of the limiting portion 313 is larger than that of the insertion portion 312, a group of connecting plates 315 located at the outer end of the limiting portion 313 are formed at the side wall of the limiting portion 313, the connecting plates 315 are used as four square top corners, and each connecting plate 315 is connected with the reinforcing rib 316 on the side wall of the limiting portion 313.

When the tool holder 300 needs to be locked in the housing 100, as shown in fig. 5 and fig. 6, at least one locking block 500 in the housing 100 is inserted into the slot 314 and abuts against the outer end surface (the end surface facing the position-limiting portion 313) of the stop 3122, at this time, the locking block 500 blocks the movement of the stop 3122, so as to limit the tool holder 300 from being removed from the housing 100; when the tool holder 300 needs to be removed, the movement of the tool holder 300 is limited by the locking block 500 by removing the locking block 500 from the slot 314, and at this time, the tool holder 300 can be pulled out of the housing 100 or the tool holder 300 can be inserted into the housing 100.

The structure for driving the locking block 500 to move between different positions to lock and unlock the tool holder 300 is as follows, as shown in fig. 2, fig. 3, fig. 5 and fig. 6, a rotary ring 200 is rotatably arranged in the casing 100, the axis of the rotary ring 200 is at least parallel to the axis of the socket of the casing 100, preferably coaxial with the circular part of the socket, and the rotary ring 200 can rotate around the axis relative to the casing 100 under the action of external force.

As shown in fig. 6 and 7, the outer contour of the main body 230 of the twist ring 200 is circular, the central hole 220 thereof is approximately circular, and the diameter of the central hole 220 is equivalent to the outer diameter of the baffle, so that the outer circumferential surface of the baffle is attached to the wall of the central hole 210. At least one mounting hole 240 is formed in the outer circumferential surface 210 of the twist ring, preferably, the number of the mounting holes 240 is four, and the four mounting holes 240 are distributed in the upper and lower semi-circles of the twist ring 200 in pairs. Bosses 250 protruding from the outer circumferential surface 210 are formed on both sides of the mounting hole 240, and two guide plates 130 having a distance equivalent to that of the end surfaces of the bosses 250 are formed on the inner wall of the casing 100, and the guide grooves formed by the guide plates define the position of the torsion ring 200.

In order to facilitate manual operation of the rotation ring 200 to rotate, as shown in fig. 6, an operation plate 700 is disposed at the outer circumferential surface 210 of the rotation ring 200, the operation plate 700 may be one, or two or more, as shown in fig. 6, preferably two, and the two operation plates 700 are located at the left and right sides of the rotation ring 200 and between the two sets of the installation holes 240.

As shown in fig. 6, 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 twist ring 200 may be integrally formed or assembled, and when integrally formed, a reinforcing portion is formed between the arc-shaped main body 720 and the twist ring 200. When assembled, the inner wall of the arc-shaped body and the outer circumferential surface 210 of the twist ring 200 are formed with an insertion plate 260 and a slot 730 that are matched with each other.

As shown in fig. 1 and 6, a boss 710 is formed at an outer surface of the arc main body 720, the boss 710 is located at a middle portion of the arc main body 720, the boss 710 is at least embedded into the arc hole 110 of the housing 100, the arc hole 110 is smaller than the arc main body 720, the boss 710 is movable in the arc hole 110, when the boss 710 is located at one end of the arc hole 110, the locking block 500 can lock the tool holder 300, and when the boss 710 is moved to the other end of the arc hole 110, the locking block 500 does not lock the tool holder 300.

As shown in fig. 6, preferably, the surface of the boss 710 is approximately flush with the outer surface of the casing 100, and a row of parallel grooves 711 are 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 to the outside of the surface of the casing 100, so that the position of the fingers of the operator can be effectively limited, and the operation difficulty can be reduced.

Since the swivel ring 200 needs to be reset after being manually driven to rotate by the operation panel 700, as shown in fig. 6 and 9, the swivel ring 200 is further connected to an energy storage device 400 for driving the swivel ring 200 to reset after being rotated, the energy storage device 400 can store energy by being deformed when the swivel ring 200 is manually rotated, and when the external force applied to the swivel ring 200 by a human hand is released, the energy storage device 400 releases the stored energy to rotate and reset the swivel ring 200 in the direction.

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. 7, a supporting portion 270 is disposed on the outer circumferential surface 210 of the twist ring 200, the supporting portion 270 is located inside the boss 250 and maintains a gap with the boss 250, a protruding point 280 is disposed on the supporting portion 270, an end of the spring is sleeved on the outer circumference of the protruding point 280 and abuts against the supporting portion 270, as shown in fig. 1, the other end of the spring is fixed or abuts against the supporting structure 140 in the casing 100, and the supporting structure 140 may be a groove or a protruding point.

As shown in fig. 6 and 8, a support shaft 600 extending in a direction parallel to the axis of the rotation ring 200 is fixed in each of the mounting holes 240 of the rotation ring 200, the support shaft 600 is rotatably provided with the locking block 500 thereon, each of the locking blocks 500 rotates in a mounting hole 240, the thickness of each of the locking blocks is equivalent to the width of the mounting hole 240, and the length of each of the locking blocks 500 is greater than the depth of the mounting hole 240, so that in some states, the locking block 500 has a first portion 510 extending into the central hole 220 of the rotation ring 200 and a second portion 520 extending to the outside of the boss 250 of the rotation ring 200.

Meanwhile, as shown in fig. 8, a driving protrusion 150 corresponding to each locking block 500 is formed at an inner wall of the casing 100, and the driving protrusion 150 at least includes two driving surfaces 151, 152 at an obtuse angle, wherein the driving surface 151 is proximate to and substantially tangent to an outer surface of the boss 250 of the swivel ring 200, and another driving surface 152 extends from the inner wall of the casing 100 to the driving surface 151 to engage with the driving surface 151.

As shown in fig. 6 and 8, each driving protrusion 150 faces and is embedded in one V-shaped recess 530 of the locking block 500, the V-shaped recess 530 is located at a vertex of the second portion 520 proximate to the inner wall of the casing 100, and two planes 531, 532 of the V-shaped recess 530 are respectively parallel or approximately parallel to the two driving surfaces 151, 152 of the driving protrusion 150, so that the second portion 520 cooperates with the driving protrusion 150 to drive the locking block 500 to switch between the first state and the second state during the rotation of the rotation ring 200.

In the first state, the first portion 510 of the locking block 500 extends into the central hole 220 and can limit the tool holder inserted into the central hole 220 from moving freely, and specifically, the first portion 510 at least partially coincides with the stop 3122 of the tool holder 300, where coincidence means that projections of the first portion 510 and the stop 3122 on the same projection plane have a coincident portion, and the projection plane is perpendicular to the axis of the rotation ring 200. At this time, the first portion 510 is located on the moving path of the blocking table 3122, and when the first portion 510 is located at the inner side of the blocking table 3122, the tool holder 300 cannot be continuously inserted into the housing 100; when the first portion 510 is located outside the stop 3122, the first portion 510 restricts the stop 3122 from moving to the outside of the socket, and at the same time, the outer end surface of the rotation ring is attached to the inner end surface of the limit portion of the tool holder, so that the connector can be effectively locked on the housing 100.

When the knob ring 200 rotates clockwise, the locking block 500 is driven to rotate clockwise synchronously, and due to the blocking of the driving protrusion 150 on the second part 520 of the locking block 500, the driving protrusion 150 applies a thrust to the plane 531 of the second part 520, so that the locking block 500 is driven to rotate counterclockwise around the supporting shaft 600, and the locking block 500 is switched from the first state to the second state.

In the second state, the first portion 510 does not overlap with the stop 3122, and preferably, the first portion 510 is removed from the central hole 220 of the twist ring 200, which does not limit the movement of the stop 3122 on the tool holder 300. At the same time, the second portion 520 also rotates substantially into the mounting hole 240.

Normally, the energy storage device 400 maintains the locking block 500 in the first state, so when the external thrust on the rotation ring stops, the energy storage device 400 drives the rotation ring 200 to rotate reversely, and at this time, the driving protrusion 150 applies the thrust on the flat surface 152 of the locking block 500 to rotate the locking block 500 clockwise around the supporting shaft 600 and switch from the second state to the first state.

Also, to increase the stability of the locking of the tool holder 300, as shown in fig. 6 and 8, each of the mounting holes 240 is provided with a locking block 500, and the first portion 510 of each locking block 500 has a surface 540 that is flush with the side wall of the tool holder 300, and the surface 540 is contoured according to the contour of the side wall of the region of the tool holder 300 that it contacts, preferably, the surface 540 is in an arc shape that matches the side wall of the tool holder 300. At this time, the faces of the plurality of locking blocks 500 may be positioned and defined at multiple points while being fitted to the side walls of the tool holder 300. Of course, in other embodiments, the locking block 500 may not contact the side wall of the tool holder 300.

In order to guide the tool holder 300 during assembly, as shown in fig. 5 and 9, a guide post 800 is disposed in the housing 100, and is coaxial with the swivel ring 200 and extends into the central hole of the swivel ring 200, and the guide post 800 is a tubular object matching with the outer contour of the insertion portion 312 of the tool holder 300. When assembled, the guide post 800 may be inserted into the central hole of the insertion portion 312.

Further, as shown in fig. 5 and 9, the guiding column 800 is fixed on a blocking plate 900, the blocking plate 900 is fixed in the housing 100, and the axis of the blocking plate 900 is at least parallel to, preferably coaxial with, the axis of the rotation ring, the inner end surface of the blocking plate 900 can also be used for fixing a motor, a through hole is formed on the blocking plate 900 for a motor shaft or a connecting shaft for connecting the motor shaft to pass through, and the distance from the blocking plate 900 to the locking block 500 is the same as the distance from the outer end surface of the blocking plate to the inner end surface of the tool holder 300. So that the stopping table 3122 can be effectively caught between the stopping disk 900 and the locking block 500 to secure the stability of locking.

In addition, since the thickness of the rotation ring 200 is the same as the distance from the stopper plate 900 to the stopper surface 3131 (inner end surface of the stopper portion) of the tool holder 300, when the tool holder 300 is inserted into the rotation ring 200, the outer end surface of the rotation ring 200 is in contact with the stopper surface 3131, so that the restriction of the tool holder 300 can be increased, and the reliability of locking can be ensured.

When the above structure is assembled, the knob ring 200 needs to be manually driven to rotate, so that the locking block 500 is not located on the moving path of the stop 3122 of the tool holder 300, and the tool holder 300 can be inserted into the housing 100 for assembly, which is obviously inconvenient for the assembly operation.

Then, in a preferred mode, as shown in fig. 9, an active inclined surface 317 is formed on the sidewall of the plug portion inside the stop 3122, and the active inclined surface 317 is higher than the stop 3122 and is inclined from the inner end to the outer end of the plug portion 312. The active inclined plane 317 is located on a projection, but it may also be a sloping plate of a V-shaped or L-shaped plate, and the number of the active inclined planes 317 may be one, or may be multiple, preferably two, and they are arranged oppositely.

A driven slope 290 matching with the two driving slopes 317 is formed at the hole wall of the central hole of the spin ring 200, each driven slope 290 is positioned opposite to one operation plate 700, and the driven slope 290 is positioned in a groove formed at the hole wall of the central hole of the spin knob 200, so that the portion of the driving slope 317 protruding to the outside of the abutment can contact with the driven slope 290 and drive the driven slope.

Therefore, when the tool holder 300 moves into the swivel ring 200, the driving inclined surface 317 contacts with the driven inclined surface 290 and drives the swivel ring 200 to rotate, the rotation of the swivel ring 200 drives the locking block 500 to rotate and switch from the first state to the second state, and meanwhile, the rotation of the swivel ring 200 applies pressure to the energy storage device 400 to deform and store energy.

As the tool holder 300 continues to move into the housing 100, after the driving inclined surface 317 moves to the inner side of the driven inclined surface 290, the driving inclined surface 317 no longer provides a supporting force for the rotation ring, so that the energy storage device 400 releases the stored energy to drive the rotation ring 200 to rotate in the reverse direction and drive the locking block 500 to move from the second state to the first state, at this time, the locking block 500 and the stop 3122 have a coinciding portion and the locking block 500 is located at the outer side of the stop 3122, thereby confining the tool holder 300 in the housing 100.

The scheme further discloses a power tool, as shown in fig. 9, comprising the head and body quick-change structure of the multifunctional power tool. The housing 100 is provided therein with a motor 1000, a transmission structure (not shown), a control board (not shown), and other structures of a conventional power tool. The casing 100 is provided with a start key 4000 protruding out of the casing 100 to control the start and stop of the motor 1000 and a steering switch key 2000 having two ends protruding out of the casing main body to control the forward rotation, the reverse rotation and the locking of the motor 1000, and generally, when the steering switch key 2000 is located at a middle position (a locking position), the hand tool is locked, and the start key 4000 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 4000 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 1000, the control panel, the start key 4000, 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 handheld 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 housing 100.

The tool post 300 may be a tool post with various functions, and a transmission structure connected to the motor 1000 is provided in the tool post 300, so that the torque of the motor is transmitted to a working head, such as a drill, a reciprocating saw blade, a grinding disc, a punch, etc., mounted on the tool post 300, and the working head is driven to rotate or reciprocate.

A torque output structure capable of being directly or indirectly connected with a motor and transmitting torque is provided in the tool holder 300 having different functions, for example, as shown in fig. 5, a rotating shaft of the motor 1000 is coaxially connected with a spline 5000, an output shaft 6000 is coaxially and rotatably provided in the tool holder 300, and when the tool holder 300 is fixed in the main housing, the spline 5000 coaxially fixed on the rotating shaft of the motor 1000 is inserted into a spline groove formed at an inner end surface of the output shaft 6000, 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 tool holder 300 may refer to the torque output structures disclosed in the prior art with application numbers 981185789, 991005600, 011119624, 2007200359081, etc.

Since some of the tool holders 300, such as a functional tool holder for a polisher, a circular saw, etc., are assembled to the housing 100 and 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-mentioned object.

Specifically, as shown in fig. 9, the steering control mechanism includes a steering switch key 2000 disposed on the housing 100, a steering switch locking member 3000 disposed at the socket of the housing 100, the steering switch locking member 3000 being driven by an elastic member 7000 to return after moving, the steering switch locking member 3000 being driven to move linearly between a first position and a second position,

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

in the second position, the steering key is restricted from being positioned in the forward or reverse position or the steering key 2000 is restricted from being positioned in the lock position and can be moved only to one side.

As shown in fig. 9, the steering switch locking member 3000 is located at a socket where the housing 100 is butted with different tool holders, and the 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 an inner wall of the housing 100 to ensure that the steering switch locking member 3000 can move back and forth along a direction parallel to an axis of the turn ring.

As shown in fig. 10, the steering switch locking member 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, and preferably a circular cylinder.

Meanwhile, as shown in fig. 10, the main plate 3100 is held in the first position by an elastic member 7000 abutted against the main plate, and the elastic member 7000 may be an elastic member which is deformed when pressed and automatically restored when the pressing force is removed, such as a spring, a metal leaf spring, etc., or even a sponge, etc., preferably a spring, which is sleeved on the periphery of the rear end plate 3120, and has one end abutted against the stepped surface of the front end of the rear end plate 3120 and the other end abutted against the baffle 150 formed on the inner wall of the cabinet 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 7000 moves the main plate 3100 to be reset.

As shown in fig. 10 and 11, 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. 10 and 12, 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, i.e., when the elastic member 7000 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, i.e., 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. 10 and 12, 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 diverting switching 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 diverting switching 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 housing, the blocking portion 3200 may push the sloping 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. 10 and 12, the inner end of the first shutter 2100 is engaged with a second shutter 2300 perpendicular to the first shutter, 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.

Further, as shown in fig. 13, the tool holder 300 of the electric power tool, which only needs the motor to rotate in one direction, is provided with a driving portion 320 matched with the steering switching lock 3000, the driving portion 320 is a driving plate corresponding to the main plate 3100, and when the tool holder 300 is integrally connected to the housing 100, the driving portion abuts against the main plate 3100 and pushes the main plate 3100 to move into the housing 100, that is, to move from the first position to the second 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 invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.

Claims (10)

1. Rotary power tool knife rest connection structure, its characterized in that: comprises that

A housing (100);

a rotary ring (200) rotatably provided in the housing (100);

the tool holder (300) is detachably inserted into the central hole of the rotary ring (200);

the energy storage device (400) drives the rotary ring (200) to rotate and then reset;

a locking block (500) rotatable between a first state and a second state about a support shaft (600) parallel to an axis of the swivel ring during rotation of the swivel ring;

the locking block (500) has a first part which is at least partially overlapped with a blocking platform of the tool rest (300) inserted in the central hole in a first state;

the locking block (500) is in a second state, and the first part is not coincident with the blocking platform.

2. The rotary power tool holder attachment structure according to claim 1, wherein: an operation plate (700) is arranged on the outer circumferential surface of the rotary ring (200).

3. The rotary power tool holder attachment structure according to claim 1, wherein: the locking block (500) further comprises a second part extending to the outer side of the rotary ring (200) in the first state, and the second part is matched with the driving protrusion on the inner wall of the shell to drive the locking block (500) to switch between the first state and the second state in the rotating process of the rotary ring (200).

4. The rotary power tool holder attachment structure according to claim 1, wherein: the locking block (500) is in a plurality, and a first part of each locking block (500) is provided with a surface which is attached to the side wall of the tool rest (300).

5. The rotary power tool holder attachment structure according to claim 1, wherein: a guide column (800) coaxial with the knob ring is arranged in the machine shell (100), and the tool rest (300) is provided with a hole matched with the guide column (800).

6. The rotary power tool holder attachment structure according to claim 1, wherein: a blocking disc (900) with an axis at least parallel to the axis of the rotary ring is arranged in the machine shell, and the distance from the blocking disc (900) to the locking block (500) is consistent with the distance from the outer end face of the blocking table to the inner end face of the tool rest (300).

7. The rotary power tool holder attachment structure according to claim 6, wherein: the thickness of the rotary ring is consistent with the distance from the blocking disc to the limiting surface on the tool rest (300).

8. The rotary power tool holder attachment structure according to claim 1, wherein: the inner wall of the rotary ring (200) is provided with at least one driven inclined surface inclined from the outer end surface to the inner end surface, and the tool rest (300) is provided with a driving inclined surface matched with the driven inclined surface.

9. The rotary power tool holder attachment structure according to any one of claims 1 to 8, wherein: the shell is provided with a steering switching key, the socket end of the shell is provided with a steering switching locking piece which can be driven to linearly move between a first position and a second position,

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

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

10. A power tool, characterized in that: comprising the rotary power tool holder attachment structure of any one of claims 1-9.

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