CN212527534U - Locking structure and electric screwdriver - Google Patents

Abstract

The utility model provides a locking structure belongs to electric tool technical field, include: the machine head is provided with a first locking groove and a first shaft hole; the lock core is sleeved on the machine head, and a second locking groove and a second shaft hole are formed in the lock core; the locking sleeve is slidably sleeved on the lock core, a guide inclined plane is arranged on the locking sleeve, and guide grooves are formed on two sides of the guide inclined plane; the locking rod is arranged in the first locking groove and the second locking groove; there is also provided an electric screwdriver comprising: criticize first mechanism and actuating mechanism, criticize first mechanism and lock core and be connected, actuating mechanism with the aircraft nose is connected to criticize first mechanism through locking structure with actuating mechanism can dismantle the connection. The utility model has the advantages that: locking structure is very ingenious, adopts the chute structure to drive the radial activity of locking lever, so very reliable durable, and electronic screwdriver adopts this locking structure can make when criticizing first mechanism and dismantle convenient more durable.

Description

Locking structure and electric screwdriver

Technical Field

The utility model belongs to the technical field of electric tool, a locking structure is related to, still relate to an electronic screwdriver that has this locking structure.

Background

The electric screwdriver generally comprises a driving motor, a reduction box, a machine head and the like, and is used as a convenient and efficient screwing tool which is more and more widely applied in industry and various construction processes at present.

For example, a chinese patent application No. 201920326204.2 discloses an electric screwdriver, comprising: a housing extending in a linear direction and formed with an accommodating chamber; the driving assembly is installed in the accommodating cavity; the drive integration includes: the bit adapter shaft is used for connecting a bit; the motor is used for driving the bit adapter to rotate; a power supply for supplying power to the motor; the driving assembly is arranged along a linear direction and is provided with a mounting hole for connecting to the shell; a connecting part for connecting a driving assembly is formed in the accommodating space, and the driving assembly is matched with the connecting part through the mounting hole and is connected to the shell along the linear direction.

Foretell this kind of electronic screwdriver, in fact be connected the extension subassembly on the aircraft nose, and the extension subassembly is connected on the aircraft nose after cooperating through torsional spring and lock sleeve, among the specific connection process, make the torsional spring warp through rotating the lock sleeve, thereby make the torsional spring block in the ring groove of aircraft nose, change the extension subassembly at every turn and all need lock through the torsional spring, but the torsional spring elasticity can reduce after using certain number of times, lead to the torsional spring can't press from both sides tight ring groove, so this kind of locking structure who adopts the torsional spring has the defect, and, current screwdriver, because adopt the torsional spring to carry out the chucking among the locking structure, so the relation of connection of extension subassembly and aircraft nose is durable inadequately, can lead to connecting reliably inadequately after changing the screwdriver head many times.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a locking structure, still provided an electronic screwdriver.

The purpose of the utility model can be realized by the following technical proposal: a locking structure comprising:

the machine head is provided with a first locking groove and a first shaft hole;

the lock core is sleeved on the machine head, a second locking groove and a second shaft hole are formed in the lock core, the second locking groove is used for aligning to the first locking groove, and the second shaft hole is used for being communicated with the first shaft hole;

the locking sleeve is sleeved on the lock cylinder in a sliding manner, a guide inclined plane is formed on the locking sleeve, and guide grooves are formed on two sides of the guide inclined plane;

the locking rod is arranged in the first locking groove and the second locking groove so as to lock the lock cylinder on the machine head, two ends of the locking rod are respectively arranged in the two guide grooves, and when the locking sleeve moves along the axial direction, the locking rod is driven by the guide grooves to move along the radial direction, so that the locking rod is connected with the first locking groove or separated from the first locking groove.

Preferably, be provided with the location external tooth on the global of aircraft nose, be provided with the location internal tooth on the inner circle face of lock core, the lock core cover is established when the aircraft nose is gone up the location internal tooth with the meshing of location external tooth.

Preferably, the guide slope is arranged on an inner ring surface of the locking sleeve, one end of the guide groove, which is close to the machine head, is inclined outwards, when the locking sleeve moves towards the machine head, the guide groove drives the locking rod to move in the radial direction and enables the locking rod to be embedded into the first locking groove, and when the locking sleeve moves towards the opposite direction of the machine head, the guide groove drives the locking rod to move in the radial direction and enables the locking rod to be separated from the first locking groove.

Preferably, the inner ring surface of the locking sleeve is provided with a guide block, the outer ring surface of the lock cylinder is provided with a guide groove along the axial direction, and the guide block is positioned in the guide groove so as to guide the locking sleeve to move on the lock cylinder along the axial direction.

Preferably, a spring is sleeved on the lock cylinder, one end of the spring is fixedly arranged, the other end of the spring is in abutting connection with the locking sleeve, and the spring is used for pushing the locking sleeve to one side of the machine head so that the locking rod is embedded into the first locking groove.

Preferably, a tapered end portion is arranged on the machine head, the tapered end portion is small towards one end of the lock cylinder and large towards one end of the first locking groove, and when the locking sleeve moves axially along the tapered end portion, the tapered end portion enables the locking rod to move radially.

Preferably, the first locking grooves are of annular groove structures, the number of the second locking grooves, the number of the guide inclined planes and the number of the locking rods are two, the first locking grooves are symmetrically arranged, and the guide inclined planes are symmetrically arranged.

Secondly, provide an electronic screwdriver, include: criticize first mechanism and actuating mechanism, criticize first mechanism with the lock core is connected, actuating mechanism with the aircraft nose is connected, and criticize first mechanism pass through locking structure with actuating mechanism can dismantle the connection.

Preferably, the bit mechanism comprises a housing, an input shaft, a transmission gear set and an output shaft, the transmission gear set is arranged in the housing, the input shaft and the output shaft are both connected with the transmission gear set, the lock cylinder is connected with the housing, and the input shaft is arranged in the lock cylinder in a penetrating manner.

Preferably, the driving mechanism comprises a motor, a gear box and a main shaft, the machine head is connected with the gear box, the gear box is connected with the motor, and the main shaft penetrates through the machine head and is connected with the input shaft.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this kind of structure through axial displacement lock sleeve realizes locking and unblock, need not utilize the torsion of torsional spring, so very durable reliable, in addition, this kind of locking structure is very ingenious, the locking force and the unblock power of check lock lever are provided by guide way and direction inclined plane, make the check lock lever can enough be reliable fix lock core and aircraft nose together, can be very convenient with its unblock again, whole process need not rotate the lock sleeve, only need promote or stimulate the lock sleeve can, so the operation is got up simple and conveniently.

2. Because first locking groove needs aim at with the second locking groove, so need come assistance-localization real-time through location external tooth and location internal tooth, specifically, when the lock core emboliaed on the aircraft nose, owing to fix a position the internal tooth and fix a position the external tooth meshing for first locking groove and second locking groove can be aimed at, the follow-up locking of being convenient for.

3. Because the check lock lever is tangent with lock core and aircraft nose, so the distance between direction inclined plane or guide way and the first locking groove is different, when the lock sleeve moves towards the aircraft nose direction, the perpendicular distance that direction inclined plane and guide way correspond first locking groove diminishes gradually, thereby make the check lock lever be located first locking groove, and when the aircraft nose was kept away from to the lock sleeve, the perpendicular distance that direction inclined plane and guide way correspond first locking groove grow gradually, so can make the check lock lever break away from in the first locking groove.

4. The one end of spring is contradicted on criticizing first subassembly, so be fixed the setting, and the other end then contradicts on the lock sleeve, and here will be towards criticizing first one end as one end forward, will regard as the one end backward towards the aircraft nose towards the one end of aircraft nose, and the spring can promote the lock sleeve backward, and such purpose except that providing the locking force through the spring to the lock sleeve, can also make the lock sleeve have the automatic function that resets backward, guarantees the rear end that the lock sleeve is in the lock core promptly.

5. The main effect of toper tip is opened for the guide check lock lever, make the check lock lever deviate from or the part is deviate from the second locking inslot, make the lock core can embolia on the aircraft nose, its principle is exactly that the shape through the toper tip drives the radial movement of check lock lever, thereby let the user need not to promote the lock sleeve forward and just can accomplish assembly and locking operation, in brief, after having set up the toper tip, the user is as long as simple embolias the aircraft nose with the lock core on, just can accomplish automatic assembly and locking effect.

6. Through the lock core, the lock sleeve is connected and locks with dismantling of aircraft nose, can be ingenious reliable will criticize first mechanism and actuating mechanism and link together to locking is effectual, and very durable, also can not produce the damage to each component after frequently dismantling, and at locking and unblock in-process, each component (except the spring) also does not take place elastic deformation, so improved life greatly, guaranteed that the locking effect can not reduce along with repetitious usage.

Drawings

Fig. 1 is an explosion diagram of the locking structure of the present invention.

Fig. 2 is a schematic view of the working principle of the locking structure of the present invention.

Fig. 3 is a schematic view of the connection relationship between the locking sleeve and the locking rod of the present invention.

Fig. 4 is a schematic cross-sectional view of a-a of fig. 3.

Fig. 5 is a schematic structural diagram of the handpiece of the present invention.

Fig. 6 is a schematic structural diagram of the lock cylinder of the present invention.

Fig. 7 is an exploded view of the electric screwdriver of the present invention.

Fig. 8 is a schematic structural view of the electric screwdriver of the present invention.

In the figure, 100, a handpiece; 110. a first locking groove; 120. positioning the outer teeth; 130. a tapered end portion; 140. a first shaft hole; 200. a lock cylinder; 210. a second locking groove; 220. positioning the inner teeth; 230. a guide groove; 240. a spring; 250. a second shaft hole; 300. a locking sleeve; 310. a guide slope; 320. a guide groove; 330. a guide block; 400. a locking lever; 500. a bit mechanism; 510. a housing; 520. an input shaft; 530. a drive gear set; 540. an output shaft; 600. a drive mechanism; 610. a motor; 620. a gear case; 630. a main shaft.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, a locking structure includes: the locking structure of the head 100, the lock cylinder 200, the locking sleeve 300 and the locking rod 400 can be applied to a power tool, particularly a power screwdriver, to connect a screwdriver with the motor 610 and the gear box 620, and maintain a locking state, so that the screwdriver can be conveniently separated from the motor 610 and the gear box 620 when the screwdriver needs to be disassembled.

It should be noted that, in the conventional electric screwdriver, a rotating structure is generally adopted to cooperate with a torsion spring for locking, and the torsion spring is clamped on the machine head of the gear box, so that the locking unit can be connected with the gear box together, while upon disassembly, the locking element is turned to twist the torsion spring, so that the torsion spring is opened, so that the locking unit can be pulled out of the gearbox, but this locking is actually achieved by the torsion spring, the requirement for the torsion spring is very high, once the torsion force of the torsion spring is insufficient, the annular groove on the machine head cannot be clamped reliably, and the frequent rotation of the locking unit to open the torsion spring can cause the elasticity of the torsion spring to be reduced, therefore, the method of twisting the torsion spring to open by the rotating structure has the disadvantages of being not durable, having very high requirement on the torsion spring, at present, no other way is used for achieving the purpose of connection and locking between the batch head and the gear box.

In order to solve the above problems, a completely new structure is adopted in the present embodiment to achieve the locking and unlocking effects, specifically, the conventional locking structure is unlocked by rotating, but in the present embodiment, the locking sleeve 300 is pushed to unlock, the locking sleeve 300 controls the locking rod 400 to be inserted into the first locking groove 110 and the second locking groove 210 by moving axially towards the handpiece 100, so as to achieve the locking of the lock cylinder 200 and the handpiece 100, and the locking sleeve 300 controls the locking rod 400 to be pulled out from the first locking groove 110 by moving axially in the opposite direction, so as to achieve the unlocking purpose.

Preferably, the handpiece 100 is actually the front end of the electric screwdriver main body, in an actual structure, the handpiece 100 is actually a cylindrical structure formed at the front end of the gear box 620, the handpiece 100 is provided with the first locking groove 110 and the first shaft hole 140, the first locking groove 110 is opened on the surface of the handpiece 100, and in an actual structure, the first locking groove 110 is in an annular groove structure.

The lock cylinder 200 is of a sleeve-shaped structure, the lock cylinder 200 is sleeved on the machine head 100, the lock cylinder 200 is provided with a second locking groove 210 and a second shaft hole 250, it is worth explaining that the second locking groove 210 is provided on the lock cylinder 200, when the lock cylinder 200 is assembled on the machine head 100, the second locking groove 210 is aligned with the first locking groove 110, that is, the lock cylinder 200 and the machine head 100 can be fixed together only by embedding or locating the structure in the second locking groove 210 and the first locking groove 110, and the lock cylinder 200 cannot axially move on the machine head 100 at this time, so that a locking effect is achieved.

It should be noted that, when the key cylinder 200 is mounted on the head 100, the second locking groove 210 and the first locking groove 110 are correspondingly disposed up and down, i.e., aligned, so that the locking rod 400 can be inserted into the first locking groove 110 and the second locking groove 210, and when the key cylinder 200 is connected to the head 100, the first shaft hole 140 and the second shaft hole 250 are communicated and coaxially disposed, so that the main shaft and the input shaft can respectively pass through the first shaft hole 140 and the second shaft hole 250 and are connected together in the second shaft hole 250, i.e., the first shaft hole 140 is disposed so that the main shaft can pass through the head 100, and the second shaft hole 250 is disposed so that the input shaft can pass through the key cylinder 200 and is connected to the main shaft.

The locking sleeve 300 is slidably sleeved on the lock cylinder 200, that is, the lock cylinder 200 is arranged in the locking sleeve 300 in a penetrating manner, and the locking sleeve 300 can move axially along the lock cylinder 200; and the locking sleeve 300 is provided with a guide inclined plane 310, and guide grooves 320 are formed at both sides of the guide inclined plane 310.

Preferably, the guide slopes 310 and the guide grooves 320 are the most important structures for locking and unlocking, each guide slope 310 has two guide grooves 320, the guide grooves 320 are located on both sides of the guide slope 310, it is important to point out here that the guide grooves 320 are actually the sides of the guide slope 310, so the inclination direction of the guide grooves 320 is the same as the inclination direction of the guide slopes 310, in the actual structure, the guide slopes 310 are arranged on the inner circumferential surface of the locking sleeve 300, the outer ends of the guide slopes 310 are the openings of the locking sleeve 300, the guide slopes 310 are structures inclined toward the outer side of the locking sleeve 300, so the guide grooves 320 are the sides of the guide slopes 310, which are also arranged obliquely outward, and the guide grooves 320 can drive the locking rod 400 to move radially so that the locking rod 400 is close to the handpiece 100 or far away from the handpiece 100.

Preferably, the lock sleeve 300 can only move axially on the lock cylinder 200 but cannot rotate, and specifically, a limit groove is formed on an inner ring surface of the lock sleeve 300, a limit key is arranged on the lock cylinder 200, and the limit key is arranged in the limit groove, so that the lock sleeve 300 can move axially but cannot rotate.

And a locking lever 400 disposed in the first locking groove 110 and the second locking groove 210 to lock the lock cylinder 200 to the head 100, wherein both ends of the locking lever 400 are respectively disposed in the two guide grooves 320, and when the locking sleeve 300 moves in the axial direction, the locking lever 400 is driven by the guide grooves 320 to move in the radial direction, so that the locking lever 400 is connected to the first locking groove 110 or separated from the first locking groove 110.

Preferably, the locking bar 400 is a cross-bar structure, and it should be noted that the locking bar 400 is generally tangent to the lock cylinder 200 and the handpiece 100, and both ends of the locking bar 400 are disposed in the two guide grooves 320, so that the locking bar 400 can move relative to the guide grooves 320, that is, the locking bar 400 can move relative to the guide grooves 320, and thus the locking bar 400 can move along the guide slopes 310.

It should be noted that when the locking lever 400 is locked, the two ends of the locking lever 400 are located at the inner ends of the guide grooves 320, and the inner ends of the guide grooves 320 are closer to the head 100 and the lock cylinder 200, so that the locking lever 400 is also closer to the head 100, and at this time, the locking lever 400 is pressed in the first locking groove 110 and the second locking groove 210 by the guide grooves 320 and the guide slopes 310, so as to lock the lock cylinder 200 and the head 100 together.

When the locking is needed, the locking sleeve 300 moves outwards along the axial direction, so that the locking sleeve 300 is far away from the machine head 100, because the locking rod 400 is located in the first locking groove 110 and the second locking groove 210, the locking rod 400 cannot move axially and can only move radially, and along with the axial movement of the locking sleeve 300, the distance between the position of the guide groove 320 corresponding to the first locking groove 110 and the first locking groove 110 gradually increases, at this moment, the locking rod 400 is driven by the guide groove 320 and gradually separates from the first locking groove 110 along the radial direction, so that the lock cylinder 200 is separated from the machine head 100.

In a specific locking process, firstly, the lock cylinder 200 is inserted into the lock sleeve 300, and the lock rod 400 is located in the second lock groove 210, and then the locking and locking sleeve 300 is installed on the handpiece 100, that is, the lock cylinder 200 and the lock sleeve 300 move along the axial direction of the handpiece 100, when the first lock groove 110 is aligned and overlapped with the second lock groove 210, the lock sleeve 300 continues to be pushed to move axially, so that the guide groove 320 drives the lock rod 400 to be embedded into the first lock groove 110 along the radial direction, thereby realizing a locking effect.

This kind of structure that realizes locking and unblock through axial displacement lock sleeve 300, need not utilize the torsion of torsional spring, so very durable reliable, in addition, this kind of locking structure is very ingenious, the locking force and the unblock power of check lock lever 400 are provided by guide way 320 and direction inclined plane 310, make check lock lever 400 can be enough reliable fix lock core 200 and aircraft nose 100 together, again can be very convenient with its unblock, whole process need not rotate lock sleeve 300, only need push or pull lock sleeve 300 can, so the operation is simple and convenient.

As shown in fig. 1, 2, 5, and 6, in addition to the above embodiment, the circumferential surface of the head 100 is provided with the positioning external teeth 120, the inner ring surface of the lock cylinder 200 is provided with the positioning internal teeth 220, and the positioning internal teeth 220 are engaged with the positioning external teeth 120 when the lock cylinder 200 is fitted over the head 100.

Preferably, the lock cylinder 200 and the handpiece 100 need to be positioned when being installed, and it should be noted here that, since the first locking groove 110 needs to be aligned with the second locking groove 210, the positioning needs to be assisted by the positioning external teeth 120 and the positioning internal teeth 220, and specifically, when the lock cylinder 200 is sleeved on the handpiece 100, the positioning internal teeth 220 are engaged with the positioning external teeth 120, so that the first locking groove 110 and the second locking groove 210 can be aligned for subsequent locking.

And, lock core 200 still needs preliminary location on aircraft nose 100 for lock core 200 can't rotate, if do not fix a position external tooth 120 and fix a position internal tooth 220, lock core 200 cover is established and can be rotated on aircraft nose 100, but set up and fix a position external tooth 120 and fix a position after internal tooth 220, lock core 200 and aircraft nose 100 just formed the effect of key-type connection, make lock core 200 can't rotate.

As shown in fig. 1, 2, 3, 4, 5, and 6, in the above embodiment, the guide slope 310 is disposed on the inner ring surface of the locking sleeve 300, and one end of the guide groove 320 adjacent to the handpiece 100 is inclined outward.

Preferably, the shape of the guide slope 310 is very important, the guide slope 310 is formed on the inner circumferential surface of the locking sleeve 300, so that the guide slope 310 is not a complete plane structure, the middle of the guide slope 310 is narrower, and both sides of the guide slope 310 are wider, so as to conform to the shape of the inner circumferential surface of the locking sleeve 300, and the guide slope 310 is inclined toward the outward side, so that the guide groove 320 serves as the side of the guide slope 310, so that the guide groove 320 is also inclined toward the outward side.

It should be noted that, for better illustration of the shapes of the guide groove 320 and the guide slope 310, when the locking sleeve 300 is disposed on the handpiece 100, the direction toward the handpiece 100 is the inner side, and the opposite direction is the outer side, and the end of the guide groove 320 close to the inner part of the locking sleeve 300 is the inner side, and the end close to the opening of the locking sleeve 300 is the outer side, so that the locking rod 400 can be moved radially by the axial movement of the locking sleeve 300 through the inclined guide slope 310 and the guide groove 320.

When the locking sleeve 300 moves towards the handpiece 100, the guide groove 320 drives the locking lever 400 to move in the radial direction and enables the locking lever 400 to be embedded into the first locking groove 110, and when the locking sleeve 300 moves towards the opposite direction of the handpiece 100, the guide groove 320 drives the locking lever 400 to move in the radial direction and enables the locking lever 400 to be separated from the first locking groove 110.

Since the guide groove 320 is inclined outward, the end of the guide groove 320 close to the handpiece 100 is closer, so that the locking sleeve 300 only needs to be pushed toward the handpiece 100, the locking bar 400 can gradually move to the end of the guide groove 320 close to the interior, so that the locking bar 400 enters the first locking groove 110, and the guide inclined surface 310 can assist the locking bar 400 to move, so that the locking bar 400 can move more smoothly in the radial direction.

When the locking sleeve 300 is moved in the opposite direction due to the shape of the guide groove 320 during unlocking, the locking rod 400 is located at the outer end of the guide groove 320, so that the locking rod 400 is moved in the axial direction and separated from the first locking groove 110.

It should be noted that, since the locking bar 400 is tangent to the lock cylinder 200 and the handpiece 100, the distance between the guiding slope 310 or the guiding groove 320 and the first locking groove 110 is different, and when the locking sleeve 300 moves towards the handpiece 100, the vertical distance between the guiding slope 310 and the guiding groove 320 corresponding to the first locking groove 110 becomes smaller gradually, so that the locking bar 400 is located in the first locking groove 110, and when the locking sleeve 300 moves away from the handpiece 100, the vertical distance between the guiding slope 310 and the guiding groove 320 corresponding to the first locking groove 110 becomes larger gradually, so that the locking bar 400 can be disengaged from the first locking groove 110.

As shown in fig. 1, 2, 3 and 6, in addition to the above embodiments, a guide block 330 is disposed on the inner ring surface of the lock sleeve 300, a guide groove 230 is disposed on the outer ring surface of the lock cylinder 200 along the axial direction, and the guide block 330 is located in the guide groove 230 so as to guide the lock sleeve 300 to move on the lock cylinder 200 along the axial direction.

Preferably, the lock sleeve 300 can move axially relative to the lock cylinder 200, and the lock sleeve 300 can move along the guide groove 230 through the guide block 330, so as to ensure that the lock sleeve 300 can only move axially and cannot rotate, it should be noted here that, because of the connection relationship between the lock sleeve 300 and the lock rod 400 and the connection relationship between the lock rod 400 and the second locking groove 210, once the lock sleeve 300 rotates relative to the lock cylinder 200, the lock rod 400 can be damaged, so that the guide block 330 and the guide groove 230 are required to prevent the relative rotation between the lock sleeve 300 and the lock rod 400, and while ensuring that the lock rod 400 cannot be damaged, the lock rod 400 can be ensured to be reliably tangent in the second locking groove 210.

As shown in fig. 1, 2, 4, 5, and 6, on the basis of the above embodiment, a spring 240 is sleeved on the lock cylinder 200, one end of the spring 240 is fixedly disposed, and the other end of the spring is connected to the lock sleeve 300 in an abutting manner, and the spring 240 is used for pushing the lock sleeve 300 to one side of the machine head 100, so that the lock rod 400 is inserted into the first lock groove 110.

Preferably, the spring 240 is sleeved on the lock cylinder 200, and one end of the spring 240 abuts against the bit assembly, so that the spring is fixedly disposed, and the other end of the spring abuts against the lock sleeve 300, where the end facing the bit is taken as the forward end, and the end facing the handpiece 100 is taken as the backward end, and the spring 240 can push the lock sleeve 300 backward, so that the lock sleeve 300 can have an automatic backward resetting function, that is, the lock sleeve 300 is ensured to be located at the rear end of the lock cylinder 200, in addition to providing a locking force to the lock sleeve 300 through the spring 240.

In an actual structure, since the lock sleeve 300 is located at the rear end of the lock cylinder 200, the guide slope 310 and the guide groove 320 force the lock rod 400 to be located in the first lock groove 110, and in order to ensure the locking effect of the lock rod 400, a backward acting force needs to be applied to the lock sleeve 300, so that the lock sleeve 300 applies an axial locking force to the lock rod 400, and after the spring 240 is provided, the spring 240 can effectively apply a locking force to the lock rod 400 through the lock sleeve 300, thereby ensuring the locking reliability.

In addition, the spring 240 enables the locking bar 400 to be automatically pressed into the first locking groove 110 when the locking sleeve 300 and the lock cylinder 200 are mounted to the head 100, because, in the actual construction, the locking lever 400 provided on the locking sleeve 300 is also seated in the second locking groove 210, the lock cylinder 200 cannot be sleeved on the machine head 100 due to the blocking of the lock rod 400, and at this time, only the lock sleeve 300 can be pushed forward, so that the lock rod 400 is firstly released from the second lock sleeve 300, then the lock cylinder 200 is loaded on the head 100, and when the external force pushing the lock sleeve 300 forward is released, the spring 240 pushes the lock sleeve 300 backward, so that the locking lever 400 has a tendency to move in an axially inward direction, once the locking lever 400 is located at the position of the first locking groove 110, the screwdriver head can be automatically locked into the first locking groove 110 and the second locking groove 210, so that the locking process can be greatly optimized, and the screwdriver head can be replaced more conveniently and simply.

As shown in fig. 1, 2, 3, 4, 5 and 6, in addition to the above embodiment, the head 100 is provided with a tapered end 130, the tapered end 130 is smaller toward one end of the lock cylinder 200 and larger toward one end of the first locking groove 110, and the tapered end 130 moves the locking rod 400 in a radial direction when the locking sleeve 300 moves in an axial direction along the tapered end 130.

Preferably, the tapered end 130 mainly functions to guide the locking rod 400 to open, so that the locking rod 400 is released or partially released from the second locking groove 210, and the lock cylinder 200 can be sleeved on the machine head 100, and the principle is that the locking rod 400 is driven to move radially by the shape of the tapered end 130, so that a user can complete the assembling and locking operations without pushing the locking sleeve 300 forward, and simply speaking, after the tapered end 130 is arranged, the user can complete the automatic assembling and locking effects by simply sleeving the lock cylinder 200 on the machine head 100.

It should be noted here that, due to the spring 240, the locking sleeve 300 is tightly pressed against the rear end of the lock cylinder 200 by the spring 240, at this time, the locking rod 400 extends into the second locking groove 210, that is, a part of the locking rod 400 is located in the inner hole of the lock cylinder 200, at this time, the locking cannot be directly installed on the handpiece 100, after the tapered end 130 is provided, since the front end of the tapered end 130 is smaller, the lock cylinder 200 can be sleeved into the tapered end 130, as the lock cylinder 200 is continuously sleeved into the whole tapered end 130 axially, the locking rod 400 contacts with the tapered end 130, and the tapered end 130 pushes the locking rod 400 axially outwards, so that the locking rod 400 is disengaged from the inner hole of the lock cylinder 200, at this time, the locking sleeve 300 overcomes the elastic force of the spring 240 and automatically moves forwards, when the locking rod 400 is separated from the tapered end 130, and the locking rod 400 corresponds to the first locking groove 110, the spring 240 pushes the locking sleeve 300 to automatically move backwards, so that the locking lever 400 is automatically caught in the first locking groove 110 and the second locking groove 210.

As shown in fig. 1, 2, 3, 5, and 6, based on the above embodiment, the first locking groove 110 is an annular groove structure, the number of the second locking grooves 210, the guide slopes 310, and the locking rod 400 is two, and the two first locking grooves 110 are symmetrically disposed and the two guide slopes 310 are symmetrically disposed.

Preferably, the first locking groove 110 is an annular groove, and the second locking groove 210 is a strip-shaped groove structure, and the second locking groove 210 is arc-shaped in cross section, so that the second locking groove 210 can conveniently correspond to the first locking groove 110 for subsequent locking.

In addition, the number of the second locking grooves 210, the guide slopes 310 and the locking bars 400 is two, and the locking bars 400 can lock both sides of the lock cylinder 200 and the head 100, thereby ensuring uniform locking force and ensuring actual locking effect.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, an electric screwdriver includes: the batch head mechanism 500 is connected with the lock cylinder 200, the driving mechanism 600 is connected with the machine head 100, and the batch head mechanism 500 is detachably connected with the driving mechanism 600 through the locking structure.

The conventional electric screwdriver actually comprises a screwdriver head mechanism 500 and a driving mechanism 600, wherein the screwdriver head mechanism 500 is used for transmission and is connected with a screw so as to screw the screw, and the driving mechanism 600 is actually used for holding a shell structure, a motor 610 and a reducer, wherein the driving mechanism 600 can drive the screwdriver head mechanism 500 to work, and the size specification of the screwdriver head needs to be matched with a screw or a bolt, so that the screwdriver head mechanism 500 needs to be frequently replaced, and for this reason, the screwdriver head mechanism 500 needs to be connected with the driving mechanism 600 through a locking connection structure.

Preferably, the batch head mechanism 500 is connected with the front end of the locking structure, specifically, the batch head mechanism 500 is fixed with the front end of the lock cylinder 200, the lock sleeve 300 is sleeved on the lock cylinder 200, the machine head 100 is connected with the driving mechanism 600, and the machine head 100 is actually a part of the driving mechanism 600, through the detachable connection and locking of the lock cylinder 200 and the lock sleeve 300 with the machine head 100, the batch head mechanism 500 can be ingeniously and reliably connected with the driving mechanism 600, and the locking effect is good, and is very durable, and after frequent detachment, each element cannot be damaged, and in the locking and unlocking process, each element (except the spring 240) cannot be elastically deformed, so the service life is greatly prolonged, and the locking effect is ensured not to be reduced along with repeated use.

As shown in fig. 1, 2, 3, 7 and 8, in addition to the above embodiment, the bit mechanism 500 includes a housing 510, an input shaft 520, a transmission gear set 530 and an output shaft 540, the transmission gear set 530 is disposed in the housing 510, the input shaft 520 and the output shaft 540 are both connected to the transmission gear set 530, the key cylinder 200 is connected to the housing 510, and the input shaft 520 is inserted into the key cylinder 200.

Preferably, the bit mechanism 500 is a screw or bolt screwing structure, and has a housing, the output shaft 540 and the output shaft 540 are located at two ends of the housing, two ends of the transmission gear set 530 are respectively linked with the output shaft 540 and the input shaft 520, and the input shaft 520 is inserted into the shaft hole of the lock cylinder 200, so that the torque transmission is more stable, and the lock cylinder 200 and the locking sleeve 300 can be reliably connected with the bit mechanism 500.

As shown in fig. 1, 2, 3, 7 and 8, in addition to the above embodiment, the driving mechanism 600 includes a motor 610, a gear box 620 and a main shaft 630, the handpiece 100 is connected to the gear box 620, the gear box 620 is connected to the motor 610, and the main shaft 630 is connected to the input shaft 520 through the handpiece 100.

Preferably, in a practical structure, the motor 610 is connected to the gear box 620, the gear box 620 can perform a speed changing function, and the main shaft 630 is connected to the gear box 620 for outputting a torque, wherein the main shaft 630 passes through a through hole of the head 100 and then passes through a shaft hole of the lock cylinder 200, so as to be connected to the input shaft 520 in the shaft hole, since the lock cylinder 200 is locked to the head 100 by the lock lever 400, the input shaft 520 and the main shaft 630 can be reliably connected together, which is very convenient and reliable, and the lock cylinder 200 and the head 100 are connected together by the lock lever 400, the generated locking force is far greater than that generated by a conventional torsion spring rotating structure, so that the reliability of the driving mechanism 600 and the bit mechanism 500 can be ensured when being connected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A locking structure, comprising:

the machine head is provided with a first locking groove and a first shaft hole;

the lock core is sleeved on the machine head, a second locking groove and a second shaft hole are formed in the lock core, the second locking groove is used for aligning to the first locking groove, and the second shaft hole is used for being communicated with the first shaft hole;

the locking sleeve is sleeved on the lock cylinder in a sliding manner, a guide inclined plane is formed on the locking sleeve, and guide grooves are formed on two sides of the guide inclined plane;

the locking rod is arranged in the first locking groove and the second locking groove so as to lock the lock cylinder on the machine head, two ends of the locking rod are respectively arranged in the two guide grooves, and when the locking sleeve moves along the axial direction, the locking rod is driven by the guide grooves to move along the radial direction, so that the locking rod is connected with the first locking groove or separated from the first locking groove.

2. A locking arrangement as claimed in claim 1, wherein: be provided with the location external tooth on the global of aircraft nose, be provided with the location internal tooth on the inner circle face of lock core, the lock core cover is established when the aircraft nose is gone up the location internal tooth with location external tooth meshing.

3. A locking arrangement as claimed in claim 1, wherein: the guide inclined plane is arranged on the inner ring surface of the locking sleeve, one end, close to the machine head, of the guide groove is arranged in an outward inclined mode, when the locking sleeve moves towards the machine head, the guide groove drives the locking rod to move in the radial direction and enables the locking rod to be embedded into the first locking groove, and when the locking sleeve moves towards the opposite direction of the machine head, the guide groove drives the locking rod to move in the radial direction and enables the locking rod to be separated from the first locking groove.

4. A locking arrangement as claimed in claim 1, wherein: the lock cylinder is characterized in that a guide block is arranged on the inner ring surface of the locking sleeve, a guide groove is axially arranged on the outer ring surface of the lock cylinder, and the guide block is positioned in the guide groove so as to guide the locking sleeve to axially move on the lock cylinder.

5. A locking arrangement as claimed in claim 1, wherein: the lock core is sleeved with a spring, one end of the spring is fixedly arranged, the other end of the spring is in abutting connection with the locking sleeve, and the spring is used for pushing the locking sleeve to one side of the machine head so that the locking rod is embedded into the first locking groove.

6. A locking arrangement as claimed in claim 5, wherein: the machine head is provided with a conical end portion, the conical end portion faces one end of the lock cylinder and is small, the end, close to the first locking groove, of the conical end portion is large, and when the locking sleeve moves axially along the conical end portion, the conical end portion enables the locking rod to move radially.

7. A locking arrangement as claimed in claim 1, wherein: the first locking groove is of an annular groove structure, the second locking groove, the guide inclined planes and the locking rods are two in number, and the first locking grooves are symmetrically arranged, and the guide inclined planes are symmetrically arranged.

8. An electric screwdriver, characterized by comprising the locking structure of any one of claims 1 to 6, and further comprising: criticize first mechanism and actuating mechanism, criticize first mechanism with the lock core is connected, actuating mechanism with the aircraft nose is connected, and criticize first mechanism pass through locking structure with actuating mechanism can dismantle the connection.

9. An electrically powered screwdriver as defined in claim 8 wherein: the bit mechanism comprises a shell, an input shaft, a transmission gear set and an output shaft, wherein the transmission gear set is arranged in the shell, the input shaft and the output shaft are both connected with the transmission gear set, the lock cylinder is connected with the shell, and the input shaft is arranged in the lock cylinder in a penetrating mode.

10. An electrically powered screwdriver as defined in claim 9 wherein: the driving mechanism comprises a motor, a gear box and a main shaft, the machine head is connected with the gear box, the gear box is connected with the motor, and the main shaft penetrates through the machine head and is connected with the input shaft.

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