CN113386071A

CN113386071A - Internal hexagonal wrench

Info

Publication number: CN113386071A
Application number: CN202110660431.0A
Authority: CN
Inventors: 伍杰; 何林; 阿克交力·克外
Original assignee: Hunan Institute of Technology
Current assignee: Hunan Institute of Technology
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-09-14
Anticipated expiration: 2041-06-15
Also published as: CN113386071B

Abstract

The utility model provides an inner hexagonal spanner, relate to assembly and disassembly tools technical field, it includes the body of rod, a front end housing, rear end cap and handle, front end cap and rear end cap divide the front and back end at the body of rod, the handle is installed on the body of rod, the body of rod is equipped with the hexagon through-hole on its axial direction, the clearance has been inserted a plurality of hexagon sleeves in the hexagon through-hole, clearance has been inserted well core rod in the hexagon sleeve of the inboard most, well core rod is the same with the telescopic length of every hexagon, the telescopic rear end of every hexagon all is equipped with the dog, be equipped with business turn over hole on the tip of front end cap, be equipped with opening adjusting device in the front end cap, it all is equipped with the push rod to correspond every dog on the rear end cap, be equipped with the return pull rod of connecting well core rod on the rear end cap. Above-mentioned allen key convenient to use can deal with the dismouting of the hexagon socket head cap screw of multiple size model simultaneously, can also withdraw well to the pole internal with well core rod and all hexagon sleeves after using up moreover to opening adjusting device can block that they are unexpected to pop out.

Description

Internal hexagonal wrench

Technical Field

The invention relates to the technical field of disassembling tools, in particular to an inner hexagonal wrench.

Background

In the modern production operation, the hexagon socket head cap screw has been very generally used on various equipment, and corresponding hexagon socket head cap screw then becomes essential assembly and disassembly tools this moment. The existing traditional hexagon socket head cap spanner is generally required to carry wrenches of various models to deal with hexagon socket head cap bolts of different sizes and models when in use, and the wrenches which are carried too many are also easily lost, and in the process of dismounting, the wrenches of different models are required to be replaced aiming at the hexagon socket head cap bolts of different sizes and models, and the efficiency is also greatly reduced.

Disclosure of Invention

The invention aims to provide an inner hexagonal wrench which can be used for inner hexagonal bolts with different sizes and models and is beneficial to improving the dismounting efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme: a socket head wrench comprises a rod body, a front end cover, a rear end cover and a handle, wherein the front end cover and the rear end cover are respectively arranged at the front end and the rear end of the rod body;

the rod body is provided with a hexagonal through hole penetrating through the front end and the rear end of the rod body in the axial direction, the cross section of the hexagonal through hole is a regular hexagon, a plurality of hexagonal sleeves with different sizes and specifications are sequentially inserted into the hexagonal through hole from outside to inside in a clearance mode, the inner cavity of each hexagonal sleeve is a regular hexagon through hole, a central rod with a regular hexagon cross section is inserted into the middle of the innermost hexagonal sleeve in a clearance mode, the length of the central rod is the same as that of each hexagonal sleeve, the rear end of each hexagonal sleeve is provided with a stop block used for abutting against the adjacent inner hexagonal sleeve, and the rear end of the innermost hexagonal sleeve is provided with a stop block used for abutting against the central rod;

the end part of the front end cover is provided with an inlet and outlet hole which can allow the central rod and all the hexagonal sleeves to extend out, and the front end cover is internally provided with an opening adjusting device which can adjust the size of the opening according to the sizes of the central rod and the hexagonal sleeves to be extended out;

the rear end cover is provided with a push rod for pushing the central rod to move forwards corresponding to each stop block, and the rear end cover is provided with a return pull rod for pushing the central rod to slide forwards and pulling the central rod to retract inwards.

Preferably, the opening adjusting device includes a disc and six sliding blocks disposed at the front end of the rod body, an inner hole through which the central rod and all the hexagonal sleeves can pass is disposed in the middle of the disc, the front end cover is sleeved on the disc and provided with a rotating groove on an inner side wall thereof in the circumferential direction of the disc, an outer edge of the disc is slidably mounted in the rotating groove, the front end cover can rotate with the disc as an axis core, six sliding grooves are disposed on a front end surface of the disc, each sliding groove corresponds to one side of a regular hexagon of the cross section of the hexagonal through hole on the rod body and is equidistant from the corresponding side, each sliding groove extends left and right in a direction parallel to one side of the corresponding regular hexagon, a limit groove is disposed on the inner end surface of the front end cover corresponding to each sliding groove on the disc, and each limit groove is not perpendicular to the corresponding sliding groove, the six sliding blocks are positioned between the inner end face of the front end cover and the front end face of the disc and respectively correspond to a sliding groove and a limiting groove, each sliding block comprises a sharp corner with an angle of 60 degrees, the sharp corners of the six sliding blocks are annularly spliced together, the front end face of each sliding block is provided with a front guide part, the rear end face of each sliding block is provided with a rear guide part, the front guide parts are slidably mounted in the corresponding limiting grooves, the rear guide parts are slidably mounted in the corresponding sliding grooves, each limiting groove is internally provided with a first compression spring, one end of each first compression spring abuts against the end part of the limiting groove, the other end of each first compression spring abuts against the front guide part, the outer edge of the disc is provided with a locking part, and the inner side wall of the front end cover is provided with a locking groove matched with the locking part;

the front end cover is rotated to drive the end part of the limiting groove to push the front guide part to slide towards the direction of the first compression spring and extrude the first compression spring, so that the rear guide part slides in the sliding groove, each sliding block synchronously moves and surrounds the middle of the sliding blocks to form regular hexagon openings with different sizes, and the locking part is clamped into the locking groove to lock and position the front end cover; after the locking piece moves out of the locking groove, the sharp corners of the six sliding blocks are driven to fold inwards by the resilience force of the first compression spring.

More preferably, the rear end cover is provided with a plurality of guide posts inside, wherein one guide post is provided with a front end hole and a rear end hole and the two holes are separated, the front end hole and the rear end hole are communicated through a connecting hole arranged at the separation part, the rear end hole penetrates through the end part of the rear end cover, a connecting block and a second compression spring are arranged in the hole at the front end in a clearance mode, the front end of the connecting block is connected with the rear end of the central rod, the return pull rod is arranged in the rear end hole in a clearance mode, the front end of the return pull rod is provided with an insertion hole, the rear end of the return pull rod is provided with a movable hole with the aperture larger than the inner diameter of the jack, the jack is communicated with the movable hole, the movable hole is internally provided with a limiting block in a clearance manner, the connecting hole is internally provided with a connecting rod in a clearance manner, the front end of the connecting rod passes through the second compression spring to be connected with the rear end of the connecting block, and the rear end of the connecting rod passes through the jack to be connected with the limiting block;

the other guide posts are provided with guide sliding holes, a push rod is arranged in each guide sliding hole in a clearance mode, the front end of each push rod is connected with a corresponding stop block, and a third compression spring is arranged between the rear end of each push rod and the bottom of each guide sliding hole;

the central rod is pushed to slide forwards by the resilience force of the second compression spring, and the hexagonal sleeve is pushed to slide forwards by the resilience force of the third compression spring; the return pull rod is pulled to drive the central rod to slide backwards, and the hexagonal sleeve is driven to slide backwards together under the limiting action of the stop block.

More preferably, the rod body is in a shape of a straight prism, the handle is a movable handle, the handle comprises a middle movable part and a holding part arranged on the side surface of the movable part, a mounting hole matched with the shape of the rod body is formed in the middle of the movable part and is sleeved on the rod body, and the movable part can slide back and forth along the axial direction of the rod body.

More preferably, the side of the body of rod is equipped with a plurality of draw-in grooves along its axial direction, one side of movable part is equipped with movable draw-in groove, movable draw-in groove's bottom is equipped with the locking opening that runs through to the mounting hole, movable mounting has the locking part in the movable draw-in groove, by realize the locking location to the handle in the draw-in groove of the body of rod is gone into to the locking part through the locking opening card.

More preferably, the locking part includes the locking portion of front end and the portion of stirring of rear end, locking portion can pass the locking opening and block in the draw-in groove of the body of rod, by stirring the portion of stirring of locking part controls the card of its locking portion in the draw-in groove to be gone into and shifts out, realizes the locking location and the release locking of handle.

More preferably, the rod body is in a regular prism shape with a square bottom surface.

More preferably, the periphery of the front end cover is provided with an anti-slip device which is convenient to hold.

More preferably, the rear end of each of the hexagonal sleeves except the outermost hexagonal sleeve is provided with a notch for fitting the stopper on the adjacent outer hexagonal sleeve, and the rear end of the center rod is provided with a notch for fitting the stopper on the innermost hexagonal sleeve.

More preferably, the stop blocks on two adjacent hexagonal sleeves are arranged oppositely.

Above-mentioned allen key convenient to use adopts the opening adjusting device who is similar to the iris structure, can realize regular hexagon open-ended extension and closure fast, through rotatory front end housing, can adjust regular hexagon open-ended size, lets well core rod and the hexagon sleeve of required size pop out. Set up the return pull rod at well core rod's rear end to set up the dog at the telescopic rear end of hexagon, then through pulling the return pull rod backward, realize well core rod and the telescopic synchronous inside withdrawal of all hexagons, it is convenient quick. Moreover, above-mentioned allen key is through the hexagon sleeve and the central pole combination with multiple model together, make its allen key function that possess multiple size model, not only be difficult to lose, and the spanner that corresponds bolt size can find very fast in addition, greatly improved efficiency, and simultaneously, use above-mentioned allen key to the industrial automation field, can also explain the efficient problem of puzzlement robot because of multiple bolt model, also can make things convenient for relevant practitioner's assembly work, and the device has a good application prospect.

Drawings

FIG. 1 is a perspective view of an allen wrench in use;

FIG. 2 is an exploded view of the allen wrench;

FIG. 3 is a perspective view of the disk;

FIG. 4 is a perspective view of a disk with a slider mounted thereon;

FIG. 5 is a perspective view of the front end cap;

FIG. 6 is a perspective view of the front guide in the slide;

FIG. 7 is a perspective view of the rear guide in the slide;

FIG. 8 is a perspective view of the shank encased in the hexagonal sleeve and the center shank;

FIG. 9 is an exploded view of all of the hexagonal sleeves;

FIG. 10 is a perspective view of a center pole;

FIG. 11 is an exploded view of the components of the rear end cap;

FIG. 12 is a cross-sectional view of the rear end cap;

FIG. 13 is a perspective view of the handle;

fig. 14 is a perspective view of the locking member.

In the figure:

1-rod body 2-front end cover 3-rear end cover

4-handle 5-central rod 6-hexagon sleeve

7-stop block 8-inlet and outlet hole 9-push rod

10-return pull rod 11-disc 12-slide block

13-rotating groove 14-sliding groove 15-limiting groove

16-front guide 17-rear guide 18-first compression spring

19-locking piece 20-locking groove 21-guide column

22-front end hole 23-rear end hole 24-connecting hole

25-connecting block 26-second compression spring 27-jack

28-movable hole 29-limited block 30-connecting rod

31-guide slide hole 32-threaded hole 33-third compression spring

34-movable part 35-holding part 36-mounting hole

37-clamping groove 38-movable clamping groove 39-locking opening

40-locking component 41-locking part 42-toggle part

43-notch 44-circular plate 45-external thread pipe

46-dimples 47-hexagonal through holes.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

As shown in fig. 1 to 14, the allen wrench comprises a rod body 1, a front end cap 2, a rear end cap 3 and a handle 4, wherein the front end cap 2 and the rear end cap 3 are respectively arranged at the front end and the rear end of the rod body 1, and the handle 4 is arranged on the rod body 1.

The rod body 1 can be in a shape of a right prism, and can be in a shape of a right prism with a square bottom surface, so that the maximum torque bearing capacity of the inner hexagonal wrench can be increased. The middle of the rod body 1 is provided with a hexagonal through hole 47 penetrating through the front end and the rear end of the rod body along the axial direction, and the cross section of the hexagonal through hole 47 is a regular hexagon. A plurality of hexagonal sleeves 6 with different sizes and specifications are sequentially inserted into the hexagonal through holes 47 from outside to inside in a clearance mode, the inner cavity of each hexagonal sleeve 6 is a regular hexagonal through hole, a central rod 5 with a cross section being a regular hexagon is inserted into the hexagonal sleeve 6 at the innermost side in a clearance mode, and the length of each hexagonal sleeve 6 is the same as that of the central rod 5. These hexagonal sleeves 6 are all regular hexagonal sleeves 6, and their cross section comprises two concentric regular hexagons, forms an annular regular hexagon, and these hexagonal sleeves 6 are the clearance fit in hexagon through-hole 47 in proper order from big to little, and all hexagonal sleeves 6 can slide back and forth in hexagon through-hole 47 to well core rod 5 can slide in the hexagon sleeve 6 of the innermost, and here through setting up hexagon sleeve 6 and well core rod 5 of different sizes, can deal with the dismouting of fasteners such as hexagon socket head cap screw of different size specifications. The rear end of each hexagonal sleeve 6 is provided with a stop 7 for abutting against the adjacent inner hexagonal sleeve 6, wherein the rear end of the innermost hexagonal sleeve 6 is provided with a stop 7 for abutting against the central rod 5, and these stops 7 can both play a role in limiting. The stop blocks 7 on adjacent hexagonal sleeves 6 can be arranged in opposite directions to avoid interference. In addition, except the hexagonal sleeve 6 at the outermost side, a notch 43 for accommodating the stopper 7 on the hexagonal sleeve 6 at the adjacent outer side may be provided at the rear end of each of the remaining hexagonal sleeves 6, a notch 43 for accommodating the stopper 7 on the hexagonal sleeve 6 at the innermost side is also provided at the rear end of the center rod 5, and all the stoppers 7 are fitted into the corresponding notches 43, so that all the hexagonal sleeves 6 can be made flush with the rear end of the center rod 5, and in the case where the lengths thereof are the same, it is possible to ensure that the front end of the hexagonal sleeve 6 is flush with the front end of the center rod 5.

The front end cover 2 is provided with an access hole 8 at the front end thereof through which the central rod 5 and all the hexagonal sleeves 6 can extend, and an opening adjusting device at the inner side of the front end thereof, the opening adjusting device being capable of adjusting the size of the opening according to the size of the central rod 5 and the hexagonal sleeves 6 to be extended. The opening adjusting device comprises a disc 11 and six sliding blocks 12 which are arranged at the front end of the rod body 1, an inner hole which can allow the central rod 5 and all the hexagonal sleeves 6 to pass through is formed in the middle of the disc 11, the inner hole can be a circular through hole, and the sliding blocks 12 can be polygonal sliding blocks 12. The front end cover 2 is sleeved on the disc 11, a rotating groove 13 is formed in the inner side wall of the front end cover 2 in the circumferential direction of the disc 11, the outer edge of the disc 11 is slidably mounted in the rotating groove 13, and the front end cover 2 can rotate by taking the disc 11 as a shaft core. Be equipped with locking piece 19 on the outer fringe of disc 11, be equipped with on the inside wall of front end housing 2 with locking piece 19 complex locking groove 20, go into locking groove 20 with locking piece 19 card and can realize the locking location to front end housing 2. Wherein, can be according to the front end housing 2 pivoted angle difference, the position that locking piece 19 was located is different, sets up a plurality of locking grooves 20 to make the rotatory different angles of front end housing 2 all can be locked and fix a position. Six sliding grooves 14 are formed in the front end face of the disc 11, each sliding groove 14 corresponds to one side of a hexagon with the cross section of the hexagonal through hole 47 in the rod body 1, each sliding groove 14 is spaced from the corresponding side by the same distance, each sliding groove 14 extends left and right in the direction parallel to one side of the hexagon with the cross section of the hexagonal through hole 47 in the corresponding rod body 1, and the six sliding grooves 14 are connected with each other to form a regular hexagon. Each sliding groove 14 on the corresponding disc 11 on the inner end surface of the front end cover 2 is provided with a limiting groove 15, the limiting groove 15 may be a strip-shaped groove, and each limiting groove 15 is not perpendicular to the corresponding sliding groove 14. Six sliding blocks 12 are positioned between the inner end surface of the front end cover 2 and the front end surface of the circular disc 11 and respectively correspond to a sliding groove 14 and a limiting groove 15, each sliding block 12 comprises a sharp corner with an angle of 60 degrees, and the sharp corners with the angles of 60 degrees of the six sliding blocks 12 are annularly spliced together, so that the six sliding blocks 12 can simultaneously move outwards to form a regular hexagon opening in a surrounding mode. The front end surface of each slider 12 is provided with a front guide 16, the rear end surface of each slider 12 is provided with a rear guide 17, the front guide 16 may be a circular cylinder, and the rear guide 17 may be a square block. The front guide 16 is slidably mounted in the corresponding stopper groove 15, and the rear guide 17 is slidably mounted in the corresponding slide groove 14. Each limiting groove 15 is further provided with a first compression spring 18, one end of each first compression spring 18 abuts against the end of the limiting groove 15, the other end of each first compression spring 18 abuts against the front guide piece 16, the first compression springs 18 can generate thrust on the front guide piece 16, after the front guide piece 16 slides along the limiting grooves 15 towards the first compression springs 18 and extrudes the first compression springs 18, the locking pieces 19 are moved out of the locking grooves 20, and the front guide pieces 16 can return to slide under the pushing of resilience force of the first compression springs 18.

The rear end cover 3 is internally provided with a plurality of guide posts 21, wherein one guide post 21 is provided with a front end hole 22 and a rear end hole 23, the two holes are separated, the separation positions of the two holes are provided with connecting holes 24, the front end hole 22 is communicated with the rear end hole 23 through the connecting holes 24, and the rear end hole 23 penetrates through the end part of the rear end cover 3. A connecting block 25 and a second compression spring 26 are installed in the front end hole 22 with a gap, the front end of the connecting block 25 is connected with the rear end of the central rod 5, and the connection mode can be a threaded connection. A return pull rod 10 is arranged in the rear end hole 23 in a clearance mode, an insertion hole 27 is formed in the front end of the return pull rod 10, a movable hole 28 with the diameter larger than the inner diameter of the insertion hole 27 is formed in the rear end of the return pull rod 10, and the insertion hole 27 is communicated with the movable hole 28. The limiting block 29 is installed in the movable hole 28 in a clearance mode, the connecting rod 30 is installed in the connecting hole 24 in a clearance mode, the front end of the connecting rod 30 penetrates through the second compression spring 26 to be connected with the rear end of the connecting block 25, the rear end of the connecting rod 30 penetrates through the inserting hole 27 to be connected with the limiting block 29, the second compression spring 26 can provide thrust for the connecting block 25, and the central rod 5 is pushed to slide forwards under the effect of resilience force of the second compression spring 26. In addition, a circular plate 44 with a shape corresponding to the end shape of the rear end cover 3 can be arranged at the rear end of the return pull rod 10, the circular plate 44 abuts against the rear end surface of the rear end cover 3, and the return pull rod 10 can be pulled to move backwards by moving the circular plate 44 outwards. The rear end of the rod body 1 can be provided with an external thread pipe 45 and is connected with the rear end cover 3 through the external thread pipe 45, so that the rod body is convenient to detach.

The rest guide posts 21 are provided with guide sliding holes 31, a push rod 9 is arranged in each guide sliding hole 31 in a clearance mode, and each push rod 9 corresponds to a stop 7 on the hexagonal sleeve 6. The front end of each push rod 9 abuts against the corresponding stop dog 7, a third compression spring 33 is arranged between the rear end of each push rod 9 and the bottom of the guide sliding hole 31, the third compression spring 33 can generate thrust for the push rods 9, the third compression spring 33 rebounds to push the push rods 9 to move forwards, the push rods 9 are enabled to push the stop dogs 7, and then the hexagonal sleeves 6 are pushed to slide outwards.

In this embodiment, the front end periphery of connecting block 25 can set up the external screw thread, and threaded hole 32 can be seted up to well core rod 5's rear end, installs the front end screw thread of connecting block 25 in threaded hole 32, the dismouting of can being convenient for. In addition, in the present embodiment, all the guide posts 21 may be connected integrally.

The handle 4 can be a movable handle, and comprises a movable part 34 in the middle and a holding part 35 arranged on the side surface of the movable part 34, wherein the middle of the movable part 34 is provided with a mounting hole 36 matched with the shape of the rod body 1 and sleeved on the rod body 1, the movable part 34 can slide back and forth along the axial direction of the rod body 1, and the torque of the inner hexagonal wrench can be changed by moving the handle 4 so as to adapt to different torques. The side of the rod body 1 is provided with a plurality of clamping grooves 37 along the axial direction, one side of the movable part 34 is provided with a movable clamping groove 38, the bottom of the movable clamping groove 38 is provided with a locking opening 39 penetrating through the mounting hole 36, a locking part 40 is movably mounted in the movable clamping groove 38, and the locking part 40 can be clamped into the clamping grooves 37 of the rod body 1 through the locking opening 39 to realize locking and positioning of the handle 4. The locking part 40 comprises a locking part 41 at the front end and a toggle part 42 at the rear end, the locking part 41 can penetrate through the locking opening 39 and be clamped into the clamping groove 37 of the rod body 1, the toggle part 42 toggling the locking part 40 controls the locking part 41 to be clamped into and moved out of the clamping groove 37, and therefore locking positioning and unlocking of the handle 4 can be achieved.

In the use of allen key, when under the non-operating condition, well core rod 5 is located the hexagon through-hole 47 of the body of rod 1 with all hexagon sleeves 6, the opening adjusting device of front end housing 2 is in the closed condition, six sliders 12 fold the closure, block that well core rod 5 and hexagon sleeve 6 outwards pop out, and when six sliders 12 fold the closure, can block into locking piece 19 card in the locking groove 20, carry out the locking location to front end housing 2, avoid front end housing 2 to rotate and cause well core rod 5 and hexagon sleeve 6 in the body of rod 1 outwards to pop out. When the working state is adjusted, a user only needs to rotate the front end cover 2, the front guide piece 16 on the sliding block 12 can be pushed to slide and extrude the first compression spring 18 through the end part of the limiting groove 15 on the front end cover 2, and meanwhile, the rear guide piece 17 on the sliding block 12 is driven to slide along the sliding groove 14, so that the six sliding blocks 12 are synchronously and uniformly expanded outwards to form a regular hexagon opening with a proper size, a central rod 5 and a hexagon sleeve 6 with a required size can extend out, at the moment, the central rod 5 outwards pops out under the thrust action of the second compression spring 26, the hexagon sleeve 6 outwards pops out under the thrust action of the third compression spring 33, and the locking piece 19 is clamped into the locking groove 20 to lock and position the front end cover 2, so that the front end cover 2 cannot rotate when the inner hexagon wrench is used, and then, the position of the handle 4 is moved to adjust the torque of the inner hexagon wrench, and accomplish the locking location to handle 4 in going into the draw-in groove 37 of the body of rod 1 with locking part 40 card, just then just can use hexagon socket head cap spanner to carry out dismouting work to hexagon socket head cap screw, whole operation process is comparatively simple and convenient. When the working state is adjusted to the non-working state, the limit block 29 is pulled to move backwards by pulling the return pull rod 10 at the rear end of the rod body 1, the connecting block 25 is driven by the connecting rod 30, so as to drive the central rod 5 to slide inwards and retract, when the central rod 5 slides backwards, the hexagonal sleeves 6 on the adjacent outer sides can be pushed to slide backwards together under the blocking of the stop dog 7, by analogy, all the outer hexagonal sleeves 6 can be retracted inwards together with the central rod 5, then, the front end cap 2 is rotated reversely to remove the locking member 19 from the locking groove 20, and the front guide member 16 of the slider 12 slides back under the urging force of the first compression spring 18, and at the same time, the rear guide member 17 slides back in the slide groove 14, thereby causing the six sliders 12 to close inwardly, thereby blocking the outward ejection of the center rod 5 and all of the hexagonal sleeves 6 in the rod body 1.

It should be emphasized that the central rod 5 can be prevented from sliding out of the rod body 1 completely due to the over-long extension distance under the limiting action of the limiting block 29, and the hexagonal sleeve 6 can be prevented from sliding out of the rod body 1 due to the limiting action of the stop 7. In addition, when the hexagonal sleeve 6 extends out, the hexagonal sleeve 6 and the central rod 5 on the inner side can play a role in increasing the strength of the hexagonal sleeve and the central rod, and the maximum torque bearing capacity of the hexagonal sleeve is improved.

Above-mentioned allen key convenient to use adopts the opening adjusting device who is similar to the iris structure, can realize regular hexagon open-ended extension and closure fast, through rotatory front end housing 2, can adjust regular hexagon open-ended size, lets well core rod 5 and the hexagon sleeve 6 of required size pop out. Set up return pull rod 10 at well core rod 5's rear end to set up dog 7 at hexagonal sleeve 6's rear end, then through pulling return pull rod 10 backward, realize well core rod 5 and all hexagonal sleeve 6's synchronous inside withdrawal, it is convenient quick. In addition, the position of the handle 4 is adjustable, and the torque of the inner hexagonal wrench can be changed by adjusting the position of the handle 4 so as to adapt to different torques. Moreover, above-mentioned allen key is through the hexagon sleeve 6 and the 5 combinations of king-rod together with multiple model, make it possess the allen key function of multiple size model, not only be difficult to lose, and the spanner that corresponds the bolt size can find very fast in addition, efficiency has greatly been improved, and simultaneously, use above-mentioned allen key to the industrial automation field, can also explain the efficient problem of puzzlement robot because of multiple bolt model, also can make things convenient for relevant practitioner's assembly work, and the device has a good application prospect.

In addition, the peripheries of the front end cap 2 and the rear end cap 3 can be provided with anti-slip means for easy holding, so as to increase the friction between the front end cap 2 and the rear end cap 3 and enable the front end cap 2 and the rear end cap 3 to be screwed better, wherein the anti-slip means can be concave grains 46 distributed on the peripheral surfaces of the front end cap 2 and the rear end cap 3. In addition, the rod body 1 can also be cylindrical or in other shapes, a limiting device for preventing the handle 4 from rotating on the rod body 1 can be arranged between the rod body 1 and the handle 4, the limiting device comprises a limiting sliding groove formed in the rod body 1 and a limiting pin arranged on the handle 4, and the limiting pin is installed in the limiting sliding groove in a matched mode and can slide along the length direction of the limiting sliding groove.

Although the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.

Claims

1. An internal hexagonal wrench is characterized in that: the telescopic rod comprises a rod body (1), a front end cover (2), a rear end cover (3) and a handle (4), wherein the front end cover (2) and the rear end cover (3) are respectively arranged at the front end and the rear end of the rod body (1), and the handle (4) is arranged on the rod body (1);

the rod body (1) is provided with a hexagonal through hole (47) penetrating through the front end and the rear end of the rod body along the axial direction of the rod body, the cross section of the hexagonal through hole (47) is a regular hexagon, a plurality of hexagonal sleeves (6) with different sizes and specifications are sequentially inserted into the hexagonal through holes (47) from outside to inside at intervals, the inner cavity of each hexagonal sleeve (6) is a regular hexagonal through hole, a central rod (5) with a cross section of a regular hexagon is inserted into the middle gap of the hexagonal sleeve (6) at the innermost side, the length of the central rod (5) is the same as that of each hexagonal sleeve (6), a stop block (7) used for abutting against the hexagonal sleeve (6) on the adjacent inner side is arranged at the rear end of each hexagonal sleeve (6), and a stop block (7) used for abutting against the central rod (5) is arranged at the rear end of the hexagonal sleeve (6) on the innermost side;

an inlet and outlet hole (8) capable of enabling the central rod (5) and all the hexagonal sleeves (6) to extend out is formed in the end portion of the front end cover (2), and an opening adjusting device capable of adjusting the size of an opening according to the size of the central rod (5) and the size of the hexagonal sleeves (6) to extend out is arranged in the front end cover (2);

the rear end cover (3) is provided with a push rod (9) corresponding to each stop block (7) and used for pushing the stop blocks to move forwards, and the rear end cover (3) is provided with a return pull rod (10) used for pushing the central rod (5) to slide forwards and pulling the central rod (5) to retract inwards.

2. The allen wrench as defined in claim 1, wherein: the opening adjusting device comprises a disc (11) and six sliding blocks (12) which are arranged at the front end of a rod body (1), an inner hole through which a center rod (5) and all hexagonal sleeves (6) can penetrate is formed in the middle of the disc (11), a front end cover (2) is sleeved on the disc (11) and is provided with a rotating groove (13) on the inner side wall of the disc (11) in the circumferential direction of the disc (11), the outer edge of the disc (11) is slidably installed in the rotating groove (13), the front end cover (2) can rotate by taking the disc (11) as an axis core, six sliding grooves (14) are formed in the front end face of the disc (11), each sliding groove (14) corresponds to one side of a regular hexagon of the cross section of a hexagonal through hole (47) in the rod body (1) at equal intervals and is the same as the corresponding side, and each sliding groove (14) extends left and right along the direction parallel to the corresponding one side of the regular hexagon, the inner end face of the front end cover (2) is provided with a limiting groove (15) corresponding to each sliding groove (14) on the disc (11), each limiting groove (15) is not perpendicular to the corresponding sliding groove (14), the six sliding blocks (12) are positioned between the inner end face of the front end cover (2) and the front end face of the disc (11) and respectively correspond to one sliding groove (14) and one limiting groove (15), each sliding block (12) comprises a sharp corner with an angle of 60 degrees, the sharp corners of the six sliding blocks (12) are annularly spliced together, the front end face of each sliding block (12) is provided with a front guide piece (16), the rear end face of each sliding block is provided with a rear guide piece (17), the front guide piece (16) is slidably installed in the corresponding limiting groove (15), the rear guide piece (17) is slidably installed in the corresponding sliding groove (14), and each limiting groove (15) is provided with a first compression spring (18), one end of the first compression spring (18) abuts against the end part of the limiting groove (15), the other end of the first compression spring abuts against the front guide piece (16), a locking piece (19) is arranged on the outer edge of the disc (11), and a locking groove (20) matched with the locking piece (19) is arranged on the inner side wall of the front end cover (2);

the end part of a limiting groove (15) is driven by rotating the front end cover (2) to push a front guide piece (16) to slide towards a first compression spring (18) and extrude the first compression spring (18), so that a rear guide piece (17) slides in a sliding groove (14), each sliding block (12) synchronously moves and surrounds to form regular hexagonal openings with different sizes in the middle, and the locking piece (19) is clamped into a locking groove (20) to lock and position the front end cover (2); after the locking piece (19) moves out of the locking groove (20), the sharp corners of the six sliding blocks (12) are driven to fold inwards by the resilience force of the first compression spring (18).

3. The allen wrench as defined in claim 1, wherein: the inner part of the rear end cover (3) is provided with a plurality of guide columns (21), one guide column (21) is provided with a front end hole (22) and a rear end hole (23) and the two holes are separated, the front end hole (22) and the rear end hole (23) are communicated through a connecting hole (24) arranged at the separation part, the rear end hole (23) penetrates through the end part of the rear end cover (3), a connecting block (25) and a second compression spring (26) are installed in the front end hole (22) in a clearance manner, the front end of the connecting block (25) is connected with the rear end of the central rod (5), the return pull rod (10) is installed in the rear end hole (23) in a clearance manner, the front end of the return pull rod (10) is provided with an insertion hole (27), the rear end of the return pull rod (10) is provided with a movable hole (28) with the aperture larger than the inner diameter of the insertion hole (27), and the insertion hole (27) is communicated with the movable hole (28), a limiting block (29) is installed in the movable hole (28) in a clearance mode, a connecting rod (30) is installed in the connecting hole (24) in a clearance mode, the front end of the connecting rod (30) penetrates through a second compression spring (26) to be connected with the rear end of the connecting block (25), and the rear end of the connecting rod (30) penetrates through the insertion hole (27) to be connected with the limiting block (29);

the rest guide columns (21) are provided with guide sliding holes (31), a push rod (9) is arranged in each guide sliding hole (31) in a clearance mode, the front end of each push rod (9) is connected with a corresponding stop block (7), and a third compression spring (33) is arranged between the rear end of each push rod (9) and the bottom of each guide sliding hole (31);

the central rod (5) is pushed to slide forwards by the resilience force of the second compression spring (26), and the hexagonal sleeve (6) is pushed to slide forwards by the resilience force of the third compression spring (33); the pulling return pull rod (10) drives the central rod (5) to slide backwards and drives the hexagonal sleeve (6) to slide backwards together under the limiting action of the stop block (7).

4. The allen wrench as defined in claim 1, wherein: the utility model discloses a pole body, including the body of rod (1), the body of rod (1) is straight prism shape, handle (4) are movable handle, handle (4) including middle movable part (34) and establish portion of gripping (35) in movable part (34) side, set up in the middle of movable part (34) with mounting hole (36) that body of rod (1) appearance matches and the cover is established on the body of rod (1), movable part (34) can be followed the axial direction fore-and-aft slip of the body of rod (1).

5. The allen wrench as defined in claim 4, wherein: the side of the body of rod (1) is equipped with a plurality of draw-in grooves (37) along its axial direction, one side of movable part (34) is equipped with activity draw-in groove (38), the bottom of activity draw-in groove (38) is equipped with locking opening (39) that run through to mounting hole (36), movable mounting has locking part (40) in activity draw-in groove (38), by locking part (40) realize the locking location to handle (4) in locking groove (37) the card income body of rod (1) through locking opening (39).

6. The allen wrench as defined in claim 5, wherein: locking part (40) include locking portion (41) and the stirring portion (42) of rear end of front end, locking portion (41) can pass locking opening (39) and block in draw-in groove (37) of the body of rod (1), by stirring portion (42) of locking part (40) controls the card of its locking portion (41) in draw-in groove (37) to go into and shift out, realizes the locking location and the release locking of handle (4).

7. The allen wrench as defined in claim 4, wherein: the rod body (1) is in a regular prism shape with a square bottom surface.

8. The allen wrench as defined in claim 1, wherein: the periphery of the front end cover (2) is provided with an anti-skid device convenient to hold.

9. The allen wrench as defined in claim 1, wherein: the rear end of each hexagonal sleeve (6) except the hexagonal sleeve (6) on the outermost side is provided with a notch (43) used for being filled with the stop block (7) on the hexagonal sleeve (6) on the adjacent outer side, and the rear end of the central rod (5) is provided with a notch (43) used for being filled with the stop block (7) on the hexagonal sleeve (6) on the innermost side.

10. The allen wrench as defined in claim 1, wherein: the stop blocks (7) on two adjacent hexagonal sleeves (6) are arranged in opposite directions.