CN210879429U - Device capable of quickly replacing screwdriver bits - Google Patents

Abstract

The utility model discloses a device capable of rapidly replacing batch heads, which comprises a batch head clamping barrel, a connecting shaft and a stirring piece connected with the connecting shaft, wherein the middle part of the batch head clamping barrel is provided with a through hole, and the connecting shaft is arranged in the through hole; criticize first clamping barrel's front end outside circumference and be provided with a plurality of first clamps of criticizing, criticize the one end of first clamp and articulate on criticizing first clamping barrel through the articulated shaft, criticize the other end of first clamp and be provided with and to grasp criticize the installation position of head. The utility model discloses a but device of quick replacement batch head installs a plurality of batch heads in the front end outside circumference of batch head clamping barrel, not only can change its batch head above the batch head clamp at will, need not to rotate batch head clamping barrel and aim at and adjust batch head when the batch head is switched in work moreover, only need directly to dial out the batch head of selecting on the batch head clamp and can accomplish the switching, and its switching efficiency is showing and is improving.

Description

Device capable of quickly replacing screwdriver bits

Technical Field

The utility model relates to an electric tool technical field especially relates to a but device of quick replacement batch head.

Background

The electric screwdriver, also called as screwdriver or screwdriver, is an electric tool for screwing and unscrewing a screw and a nut. The electric screwdriver on the market is mainly composed of a shell with a handle, an armature arranged in the shell, and a drill chuck in transmission connection with the armature, wherein when a screw is twisted, the drill chuck is opened manually to clamp a batch chuck on the drill chuck, and when the drill chuck is opened manually, a special accessory is often needed to open the chuck.

To shorten the time for changing the bit, chinese patent application No. 2017108885685 discloses a hand-held power tool with a rotatable rotary magazine, which includes a screwdriver bit for receiving a screwdriver bit that can be rotationally driven by a tool receiver and has a rotatable rotary magazine for storing a plurality of screwdriver bits, in which a recognition unit is assigned to the rotary magazine, which is designed to identify the required screwdriver bit from the plurality of screwdriver bits by recognizing the respective screw head to be machined and to cause each of the identified screwdriver bits to be transported from the rotary magazine to the tool receiver. The following problems exist in the technology of the patent application: 1. the length of the batch head is limited by the thickness of the rotary drum library, and the rotary drum library is arranged in the shell, so that the batch head is short, and the batch head cannot extend into a screw in the counter bore due to the short length of the batch head; 2. because the bit is arranged in the rotary drum library which is also positioned in the shell of the hand drill, when the bit is damaged and needs to be replaced, the rotary drum library needs to be disassembled, and the disassembly of the rotary drum library is very troublesome, which inevitably wastes working time and reduces working efficiency; 3. this patent application need improve the overall structure of hand-held type machine tool for reaching the purpose of fast switch-over batch head, on can not assembling current ordinary electronic bottle opener, because whole improvement, consequently equipment manufacturing cost and market price are all higher, are unfavorable for popularizing and promoting.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a device capable of rapidly replacing screwdriver bits, which not only can significantly improve the screwdriver bit replacement efficiency, but also can be installed on the existing electric screwdriver, so that the existing common electric screwdriver has the function of rapidly replacing screwdriver bits.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

the utility model discloses a device capable of rapidly replacing batch heads, which comprises a batch head clamping cylinder, a connecting shaft and a stirring piece connected with the connecting shaft, wherein the middle part of the batch head clamping cylinder is provided with a through hole, and the connecting shaft is arranged in the through hole; criticize first clamping barrel's the front end outside circumference and be provided with a plurality of first clamps of criticizing, the one end of criticizing first clamp articulates on criticizing first clamping barrel through the articulated shaft, the other end of criticizing first clamp is provided with can the centre gripping criticize the installation position of head, the installation position is used for criticizing first axial fixity and connect on criticizing first clamp, and allow criticizing the head and rotating on the installation position, the installation position can wind the articulated shaft swings to the place ahead of through-hole and makes the axle center of criticizing the head coaxial with the axle center of connecting axle, when criticizing the axle center of head coaxial with the axle center of connecting axle, the connecting axle removes forward can make the front end of connecting axle is connected with criticizing first transmission, stirs the piece and can drive the connecting axle and move backward make criticize the front end and the first separation of connecting axle. The axis of the through hole can be consistent with the axis of the batch head clamping barrel, the batch head clamping barrel is not necessarily in a standard cylindrical shape or an elliptic cylindrical shape in order to adapt to different batch heads, the axis of the through hole is not necessarily in the center of the batch head clamping barrel, the through hole can be arranged eccentrically, and the batch head can be swung to the position right in front of the through hole after the stirring piece on the batch head clamp swings.

In order to ensure that the tail end part of the screwdriver head can be smoothly matched with the front end of the connecting shaft in an inserting manner, the tail end part of the screwdriver head can be designed to be prism-shaped, the edge of the tail end of the screwdriver head is chamfered, and the front end of the connecting shaft is provided with a prism-shaped jack which can be matched with the tail end of the screwdriver head in an inserting manner, so that the prism-shaped jack at the front end of the connecting shaft is connected with the tail end of the screwdriver head in an inserting manner, the fixed connection in the circumferential direction. Alternatively, a prismatic jack can be designed on the end face of the tail end of the screwdriver head, the front end of the connecting shaft is designed into a prismatic head, and the prismatic head at the front end of the connecting shaft can be inserted into the jack to realize circumferential fixed connection and axial sliding fit.

Preferably, the articulated shaft is ring shape, articulated shaft coaxial arrangement criticizes the front end of first clamping section of thick bamboo, a plurality of first clamps of criticizing centers on criticize the front end of first clamping section of thick bamboo and articulate simultaneously on one the articulated shaft.

Preferably, the front end of the through hole is provided with a step, an annular groove A is formed in the annular side wall of the step, and the hinge shaft is embedded into the annular groove A.

Preferably, still include the torsional spring, the one end of torsional spring is connected with a batch head clamping section of thick bamboo, and the other end of torsional spring is connected with a batch head clamp, the torsional spring gives batch head clamp is to a batch head clamping section of thick bamboo rear end wobbling power.

As an alternative, a tension spring or a spring may be used, one end of the tension spring or the spring is connected to the bit clamping cylinder, the other end of the tension spring or the spring is connected to the bit clamp, and in an initial state of the tension spring or the spring, the bit clamp is only required to be applied with a certain force to be located on the outer circumferential surface of the bit clamping cylinder.

Preferably, the batch head clamping device further comprises a return spring, one end of the return spring is abutted to the connecting shaft, and the return spring gives a force to the connecting shaft to move towards the front end of the batch head clamping barrel. Specifically, can set up the flange on the outer circumference of connecting axle is global, reset spring's internal diameter is greater than the external diameter of connecting axle for reset spring can overlap on the connecting axle, and make reset spring's one end bullet support on the flange, when inciting somebody to action the utility model discloses a when the device was installed on the electric bottle opener, can make reset spring's the other end bullet support on electric bottle opener power output shaft.

Alternatively, it is of course also possible to apply a tension spring or even a magnetic force to the connecting shaft to exert a force on the connecting shaft to move towards the front end of the cartridge, or to arrange the tension spring or spring in connection with the toggle member, i.e. to indirectly exert a force on the connecting shaft to move towards the front end of the cartridge by pulling the toggle member.

Preferably, the one end of the stirring piece is axially and fixedly connected with the connecting shaft and is matched with the connecting shaft in a circumferential rotating mode, the other end of the stirring piece is fixedly provided with a protective sleeve, the inner diameter of the protective sleeve is larger than the outer diameter of the tail end of the batch head clamping barrel, and a space capable of containing the end part of the front end of the batch head is formed between the inner side wall of the protective sleeve and the outer side wall of the tail end of the batch head clamping barrel.

Preferably, the front end of the batch head clamping barrel is provided with a limiting block, the batch head clamp is provided with a clamping block, and when the batch head clamp swings to the front end of the through hole, the limiting block is clamped on the clamping block, and the batch head axis on the batch head clamp is coaxial with the connecting shaft at the moment.

Preferably, a groove is formed in the outer circumferential surface of the batch head clamping cylinder at a position corresponding to each batch head clamp, and the groove can accommodate the batch head clamps and the batch heads at the same time.

Preferably, a magnet is arranged in the groove.

Preferably, a stepped hole is formed in the end part of the tail end of the connecting shaft, one end of the return spring is located in the stepped hole, and the end part of the return spring is abutted against the stepped surface of the stepped hole; the cross section of the small hole of the stepped hole is polygonal.

The utility model has the advantages that:

1. the utility model discloses a device capable of rapidly replacing batch heads, which comprises a batch head clamping cylinder, a connecting shaft and a stirring piece connected with the connecting shaft, wherein the middle part of the batch head clamping cylinder is provided with a through hole, and the connecting shaft is arranged in the through hole; criticize first clamping barrel's front end outside circumference and be provided with a plurality of first clamps of criticizing, criticize the one end of first clamp and articulate on criticizing first clamping barrel through the articulated shaft, criticize the other end of first clamp and be provided with and to grasp criticize the installation position of head. The utility model discloses a but device of quick replacement batch head installs a plurality of batch heads in the front end outside circumference of batch head clamping barrel, not only can change its batch head above the batch head clamp at will, need not to rotate batch head clamping barrel and aim at and adjust batch head when the batch head is switched in work moreover, only need directly to dial out the batch head of selecting on the batch head clamp and can accomplish the switching, and its switching efficiency is showing and is improving.

2. The utility model discloses a but device of quick replacement batch head is owing to do not adopt the rotary drum storehouse to rotate the mode of switching batch head for the length of batch head above the batch head clamp no longer receives the influence of rotary drum storehouse thickness, can show the length that the extension was criticized first effective work position.

3. The utility model discloses a but device of quick replacement batch head can assemble easily above the current ordinary electronic bottle opener, only needs to dismantle the drill chuck of current ordinary electronic bottle opener front end get off, then will the utility model discloses a device install in the electronic bottle opener front end can, need not to change the shell structure and the inner armature isotructure of current electronic bottle opener, consequently reduced the cost of equipment change for this device is better easily popularizes.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the device for rapidly replacing bits of the present invention after being connected to an electric screwdriver, wherein all bit holders are located in grooves on the outer circumferential surface of a bit holder;

FIG. 2 is a schematic structural view of the device for rapidly replacing the bit of the present invention after being connected to an electric screwdriver, wherein a bit belt drives the bit to swing outwards;

FIG. 3 is a schematic structural view of the device for rapidly replacing the bit of the present invention after being connected to an electric screwdriver, showing a state that the bit belt drives the bit to swing to the front side of the through hole of the bit clamping cylinder;

FIG. 4 is an enlarged view of the structure shown in area A of FIG. 3;

FIG. 5 is an enlarged view of the structure shown in area B of FIG. 3;

FIG. 6 is a schematic perspective view of a connecting shaft of the device for rapidly replacing the bit of the present invention;

FIG. 7 is a schematic view showing the three-dimensional structure of the connection relationship among the bit clamp, the bit and the torsion spring in the device for rapidly replacing the bit of the present invention;

FIG. 8 is a schematic diagram of the exploded structure of FIG. 7;

fig. 9 is a schematic three-dimensional structure diagram of a batch head clamping cylinder in the device capable of rapidly replacing the batch head of the present invention;

fig. 10 is a schematic view of a three-dimensional explosion structure of the device for rapidly replacing the bits of the present invention;

FIG. 11 is a schematic perspective view showing the relationship between the mounting position of the device for rapidly replacing the bit and the electric screwdriver of the present invention;

FIG. 12 is a schematic view showing a three-dimensional structure of the device for rapidly replacing a bit of the present invention after being connected to an electric screwdriver, showing a state where a bit is positioned in front of a through hole of a bit holder;

fig. 13 is a schematic view of the three-dimensional structure of the device for quickly replacing the screwdriver head of the present invention after being connected with the electric screwdriver, wherein all the screwdriver head clamps are positioned in the grooves on the outer circumferential surface of the screwdriver head clamping cylinder.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings:

as shown in fig. 1-13: the device capable of quickly replacing the bit in the embodiment is in transmission connection with a power output shaft 13 of an electric screw driver, and comprises a bit clamping barrel 1, a connecting shaft 2 and a stirring piece 3 connected with the connecting shaft 2, wherein a through hole 4 is formed in the middle of the bit clamping barrel 1, the connecting shaft 2 is arranged in the through hole 4, and the axis of the through hole 4 can be consistent with the axis of the bit clamping barrel 1 in the embodiment; criticize first clamping cylinder 1's the front end outside circumference and be provided with a plurality of first clamps 5 of criticizing, the one end of criticizing first clamp 5 passes through articulated shaft 6 and articulates on criticizing first clamping cylinder 1, the other end of criticizing first clamp 5 is provided with can the centre gripping criticize the installation position of head, the installation position is used for criticizing first axial fixity and connect on first clamp 5, and allow criticizing the head rotate on the installation position, the installation position can wind articulated shaft 6 swings to the place ahead of through-hole 4 and makes the axle center of criticizing head 15 coaxial with the axle center of connecting axle 2, when criticizing the axle center of head 15 coaxial with the axle center of connecting axle 2, connecting axle 2 removes forward and can make the front end of connecting axle 2 is connected with criticizing first transmission, stirs the piece 3 and can drive connecting axle 2 rearward movement makes the front end and the separation of criticizing head of connecting axle 2. Specifically, the batch head clamp 5 may be made of a plastic material with certain toughness, as shown in fig. 7, the mounting position is designed to be in the shape of a C-shaped clamping groove, the batch head is cylindrical, an annular groove B7 is formed in the outer circumferential surface of the middle part of the batch head or the part close to the tail end of the batch head, and the C-shaped clamping groove 8 of the mounting position may clamp the annular groove B7 of the batch head, so as to fix the batch head on the mounting position; in addition, in order to enable the tail end of the bit to be smoothly inserted and matched with the front end of the connecting shaft 2, as shown in fig. 8, in this embodiment, the tail end of the bit is designed to be prismatic, the edge of the tail end of the bit is chamfered, a prismatic insertion hole 21 capable of being inserted and matched with the tail end of the bit is formed in the front end of the connecting shaft 2, and the depth of the insertion hole is greater than the length of the prismatic insertion hole of the tail end of the bit, so that the prismatic insertion hole of the front end of the connecting shaft 2 is inserted and matched with the tail end of the bit, and circumferential fixed connection and axial.

The utility model discloses but the theory of operation of the device of head is criticized to quick replacement: when the pneumatic screwdriver is installed, the tail end of the screwdriver head clamping cylinder 1 is fixedly connected with the front end of the pneumatic screwdriver; when the batch heads 15 are switched, the poking piece 3 can be poked to drive the connecting shaft 2 to move backwards, so that the front end of the connecting shaft 2 is separated from the batch heads, and the separated batch heads return to the outer side of the batch head clamping cylinder 1; and then, the newly selected batch head is pulled to swing forwards to the front of the through hole 4 around the hinge shaft 6, the stirring piece 3 is stirred to enable the connecting shaft 2 to move forwards to enable the front end of the connecting shaft 2 to be in transmission connection with the batch head, so that the tail end of the batch head in front of the through hole 4 is in insertion fit with the connecting shaft 2 in the through hole 4, and the batch head is switched quickly.

As a further improvement of the above scheme, the hinge shaft 6 is circular, the hinge shaft 6 is coaxially installed at the front end of the batch head clamping barrel 1, and the plurality of batch head clamps 5 are simultaneously hinged on one hinge shaft 6 around the front end of the batch head clamping barrel 1. Specifically, the front end of the through hole 4 is provided with a step 41, the annular side wall of the step is provided with an annular groove A42, the hinge shaft 6 is embedded into the annular groove A42, a plurality of openings 9 are arranged on the front end surface of the batch head clamping barrel 1 around the axle center of the through hole 4, the opening enables the outer circumferential surface of the front end of the batch head clamping cylinder 1 to be communicated with the annular groove A, one end of the batch head clamp 5 is provided with a flat lug plate 51, the thickness of the lug plate is smaller than the width of the opening, a through hole is arranged on the lug plate, when the batch head clamp is installed, firstly, the articulated shaft 6 passes through the through hole, so that a plurality of batch head clips 5 are hung on the articulated shaft 6 in sequence, then, the position of each batch head clip 5 is made to correspond one-to-one to the position of each opening, the ring-shaped hinge shaft 6 is inserted into the annular groove a42, so that the lug plate of the batch head clamp 5 is embedded into the opening, and one end of the batch head clamp 5 can swing around the through hole 4 on the lug plate.

As a further improvement of the scheme, the batch head clamping device further comprises a torsion spring 10, one end of the torsion spring is connected with the batch head clamping cylinder 1, the other end of the torsion spring is connected with the batch head clamp 5, and the torsion spring gives force to the batch head clamp 5 to swing towards the rear end of the batch head clamping cylinder 1. In this embodiment, the middle part winding of torsional spring is on articulated shaft 6, the setting of otic placode is pressed close to the torsional spring, the one end that stretches out of torsional spring is fixed on criticizing first clamping section of thick bamboo 1, the other end is fixed on criticizing first clamping section of thick bamboo 5, more specifically, can be close to the opening part at the front end of criticizing first clamping section of thick bamboo 1 and set up a recess 11, stretch out the one end of torsional spring from the opening part back then buckle to the recess 11 in the one end of fixing the torsional spring, can set up a arch 52 in criticizing first clamping section of thick bamboo's 5 otic placode 51 side, make the other end bullet of torsional spring 10 support on arch 52, when stirring toggle 3 and make connecting axle 2 with criticize first separation, under the effect of torsional spring, criticize first will.

As a further improvement of the above scheme, the batch head clamping device further comprises a return spring 12, one end of the return spring is abutted against the connecting shaft 2, and the return spring gives a force to the connecting shaft 2 to move towards the front end of the batch head clamping barrel 1. In this embodiment, a stepped hole 22 is provided at the tail end of the connecting shaft 2, the return spring 12 is coaxially disposed in the stepped hole 22, one end of the return spring is sprung against a stepped surface of the stepped hole, and the other end of the return spring is sprung against the power output shaft 13 of the electric screw driver, so that the return spring and the connecting shaft 2 can rotate together with the power output shaft. Specifically, the cross section of the small hole of the stepped hole is polygonal, namely the hole with the innermost minimum diameter of the stepped hole is a prismatic hole, the power output shaft of the electric screw driver is arranged in a prismatic shape, and the prismatic hole in the stepped hole is used for being in transmission connection with the power output shaft of the electric screw driver. Through the improvement, the connecting shaft 2 can keep transmission connection with the batch head when rotating.

As a further improvement of the above scheme, the one end of the stirring piece 3 is connected with the connecting shaft 2 in an axial fixed manner and is matched with the stirring piece in a circumferential rotating manner, the other end of the stirring piece 3 is fixedly provided with a protective sleeve 31, the protective sleeve is coaxially sleeved at the tail end of the batch head clamping barrel 1, the inner diameter of the protective sleeve is larger than the outer diameter of the tail end of the batch head clamping barrel 1, and a space for accommodating the end part of the batch head front end is formed between the inner side wall of the protective sleeve and the outer side wall of the tail end of the batch head clamping barrel 1 by keeping a distance of.

As a further improvement of the above scheme, a limiting block 54 is arranged at the front end of the batch head clamping barrel 1, a clamping block 53 is arranged on the batch head clamp 5, and when the batch head clamp 5 swings to the front end of the through hole 4, the limiting block is clamped on the clamping block, and at this time, the batch head axis on the batch head clamp 5 is coaxial with the connecting shaft 2. The positions of the limiting blocks and the clamping blocks have various choices, and the screwdriver head clamp 5 can be limited to continuously swing when the screwdriver head axis is coaxial with the connecting shaft 2.

As a further improvement of the above scheme, a groove 14 is formed in the outer circumferential surface of the batch head clamping cylinder 1 at a position corresponding to each batch head clamp 5, and the groove can accommodate the batch head clamps 5 and the batch heads simultaneously. The cross section of the groove is in a semicircular arc shape, the length direction of the groove is generally consistent with that of the connecting shaft 2, and a certain included angle can be formed between the length direction of the groove and the length direction of the connecting shaft 2.

As a further improvement of the above solution, a magnet 16 is arranged in the recess. Through setting up the magnet or making recess itself possess certain magnetism, can make the batch head can firmly attract in the recess, prevent that the batch head from following batch head clamp 5 and coming off.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (9)

1. The utility model provides a but device of quick replacement batch head, includes batch head clamping cylinder, connecting axle, the piece of stirring of being connected with the connecting axle, its characterized in that: the middle part of the batch head clamping barrel is provided with a through hole, and the connecting shaft is arranged in the through hole; the screwdriver head clamping device comprises a screwdriver head clamping cylinder, a screwdriver head clamping shaft, a screwdriver head, a connecting shaft and a poking piece, wherein a plurality of screwdriver head clamps are circumferentially arranged on the outer side of the front end of the screwdriver head clamping cylinder, one end of each screwdriver head clamp is hinged to the screwdriver head clamping cylinder through a hinge shaft, the other end of each screwdriver head clamp is provided with an installation position capable of clamping the screwdriver head, the installation positions are used for fixedly connecting the screwdriver heads to the screwdriver head clamps in the axial direction and allowing the screwdriver heads to rotate on the installation positions, the installation positions can swing to the front of the through holes around the hinge shafts to enable the axes of the screwdriver heads to be coaxial with the axes of the connecting shaft, when the axes of the screwdriver heads are coaxial with the axes of the connecting shaft, the connecting shaft moves forwards to enable the front end of the connecting shaft to be in transmission connection with; the device is characterized by further comprising a return spring, wherein one end of the return spring is propped against the connecting shaft, and the return spring gives a force to the connecting shaft to move towards the front end of the batch head clamping barrel.

2. The device for rapidly replacing the batch head according to claim 1, wherein: the articulated shaft is the ring shape, articulated shaft coaxial arrangement is in criticizing the front end of first clamping section of thick bamboo, a plurality of first clamps of criticizing center on criticize the front end of first clamping section of thick bamboo and articulate simultaneously one on the articulated shaft.

3. The apparatus for rapid changing of bits as claimed in claim 2, wherein: the front end of the through hole is provided with a step, an annular groove A is formed in the annular side wall of the step, and the hinge shaft is embedded into the annular groove A.

4. The device for rapidly replacing the batch head according to claim 1, wherein: the one end of torsional spring with criticize first clamping section of thick bamboo and be connected, the other end and the criticizing first clamp of torsional spring are connected, the torsional spring gives criticize first clamp to criticizing first clamping section of thick bamboo rear end wobbling power.

5. The device for rapidly replacing the batch head according to claim 1, wherein: the one end of stirring piece and connecting axle between axial fixed connection, circumferential direction cooperation, the other end of stirring piece is fixed and is provided with a protective sheath, the internal diameter of protective sheath is greater than the external diameter of batch head clamping barrel tail end, form between the inside wall of protective sheath and batch head clamping barrel tail end lateral wall and can hold the space of batch head front end tip.

6. The device for rapidly replacing the batch head according to claim 1, wherein: the front end of the screwdriver head clamping barrel is provided with a limiting block, the screwdriver head clamp is provided with a clamping block, and when the screwdriver head clamp swings to the front end of the through hole, the limiting block is clamped on the clamping block, and the screwdriver head axis on the screwdriver head clamp is coaxial with the connecting shaft at the moment.

7. The device for rapidly replacing the batch head according to claim 1, wherein: the outer circumferential surface of the batch head clamping cylinder is provided with a groove corresponding to each batch head clamp, and the grooves can accommodate the batch head clamps and the batch heads simultaneously.

8. The device for rapidly replacing the batch head according to claim 7, wherein: and a magnet is arranged in the groove.

9. The device for rapidly replacing the batch head according to claim 1, wherein: a stepped hole is formed in the end part of the tail end of the connecting shaft, one end of the return spring is located in the stepped hole, and the end part of the return spring is abutted against the stepped surface of the stepped hole; the cross section of the small hole of the stepped hole is polygonal.

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