CN210879428U - Screwdriver head, quick switching device of screwdriver head and automatic screwdriver - Google Patents

Abstract

The utility model discloses a criticize head, criticize first quick switching control device and automatic bottle opener, the utility model discloses a criticize first quick switching control device with a plurality of criticizing the head install criticize the front end outside circumference in first storehouse upward, not only can change its criticize the head above pressing from both sides at will, need not to rotate criticizing first storehouse and aim at and adjust criticize the head moreover when work switching criticizes the head, only need directly to criticize the head of selecting on pressing from both sides and dial out and can accomplish the switching, its switching efficiency is showing and is improving. The utility model discloses a criticize first quick switching control device is owing to do not adopt the rotary drum storehouse to rotate the mode of switching criticizing the head for criticize the influence that the length of criticizing the head above the head clamp no longer received rotary drum storehouse thickness, can show the length that the extension criticized first effective work position.

Description

Screwdriver head, quick switching device of screwdriver head and automatic screwdriver

Technical Field

The utility model relates to an electric tool technical field especially relates to a criticize first, criticize first quick switching device and automatic bottle opener.

Background

The automatic screw driver comprises a pneumatic screw driver and an electric screw driver, the electric screw driver is also called as an electric screwdriver and is an electric tool for screwing and unscrewing a screw nut. Automatic bottle opener on the market is mainly by the casing of taking the handle, the motor of setting in the casing, the drill chuck of being connected with motor transmission, the motor of electronic bottle opener is the motor, pneumatic bottle opener adopts pneumatic motor, when turning round the screw, generally will manually open the drill chuck and will criticize the chuck and press from both sides on the drill chuck, often still need a special accessory to open when manually opening the drill chuck, this accessory is not connected with automatic bottle opener, very lose easily, in addition, manual change criticize the chuck and need spend longer time, very influence the change efficiency.

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, can not assemble on the ordinary automatic bottle opener that has now, because whole improvement, therefore equipment manufacturing cost and market price are all higher, are unfavorable for popularizing and promoting.

SUMMERY OF THE UTILITY MODEL

In view of this, it is an object of the present invention to provide a device for rapidly switching batch heads, which can not only significantly improve the batch head replacement efficiency, but also be installed on an existing automatic screw driver, so that the existing automatic screw driver has a function of rapidly replacing the batch heads.

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

the utility model discloses a batch head fast switching device, including the batch head storehouse that is used for carrying a plurality of batch heads and the batch head connecting rod that is used for being connected with the batch head, the middle part of batch head storehouse is provided with the through-hole, the batch head connecting rod is coaxially arranged in the through-hole; the batch head warehouse is characterized in that a plurality of batch head clamps are circumferentially arranged on the outer side of the front end of the batch head warehouse, a hinged shaft is coaxially arranged at the front end of the batch head warehouse, one end of each batch head clamp is hinged to the batch head warehouse through the hinged shaft, the other end of each batch head clamp is provided with an installation position capable of clamping a batch head, the installation positions are used for fixedly connecting the batch heads to the batch head clamps in the axial direction and allowing the batch heads to rotate on the installation positions, the installation positions can swing around the hinged shafts to the front of the through holes to enable the axle centers of the batch heads to be coaxial with the axle centers of the batch head connecting rods, and the batch head warehouse realizes reciprocating movement along the axial directions of the batch head connecting rods through a sliding fit; when the axle center of the batch head is coaxial with the axle center of the batch head connecting rod, the batch head library moves backwards relative to the batch head connecting rod, so that the front end of the batch head connecting rod is in transmission connection with the batch head. The axis of the through hole can be consistent with the axis of the batch head library, and the batch head library is not necessarily in a standard cylindrical shape or an elliptic cylindrical shape in order to adapt to different batch heads, so that the batch head library can be in a semi-cylindrical shape in order to save space; the axis of the through hole is not necessarily in the center of the batch head library, the through hole can be arranged eccentrically, and the batch head can be swung to the front of the through hole only by pulling the batch head clamp to swing.

Further, the sliding fit assembly comprises a fixed sleeve and a sliding sleeve, the fixed sleeve is sleeved on the screwdriver head connecting rod, and the fixed sleeve is in rotating fit with the screwdriver head connecting rod; the sliding sleeve is sleeved on the fixed sleeve, the sliding sleeve is in sliding fit with the fixed sleeve in the axial direction of the fixed sleeve, and the sliding sleeve is coaxially and fixedly installed in the through hole of the batch head warehouse.

Further, still include the torsional spring, the one end and the batch head storehouse of torsional spring are connected, and the other end and the batch head of torsional spring press from both sides and be connected, the torsional spring gives batch head presss from both sides to batch head storehouse 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 batch head magazine, the other end of the tension spring or the spring is connected to the batch head clamp, and in an initial state of the tension spring or the spring, the batch head clamp is only required to be positioned on the outer circumferential surface of the batch head magazine by applying a certain force to the batch head clamp.

Further, the front end of the batch head library is provided with a fixed backer A, the batch head clamp is provided with a movable backer A, when the batch head clamp swings to the front end of the through hole, the movable backer A abuts against the fixed backer A, and the batch head axle center on the batch head clamp is coaxial with the batch head connecting rod.

Furthermore, a fixed backer B is further arranged at one end, close to the screwdriver head clamp, of the fixed sleeve, a movable backer B is arranged on the screwdriver head clamp, and when the movable backer B and the fixed backer B are in a contact state, the screwdriver head clamp can be limited to rotate on the hinge shaft.

Further, fixed sleeve is the cylinder, be provided with the flange on the outer periphery of fixed sleeve front end, the cover is equipped with reset spring on the fixed sleeve, reset spring's one end bullet is supported on the flange, reset spring's the other end bullet is supported on the sliding sleeve, reset spring gives sliding sleeve one is to the power of fixed sleeve tail end removal.

Further, criticize first connecting rod and be cylindrical, be provided with the ball and form the ball bearing structure between fixed sleeve's inside wall and the first connecting rod lateral wall of criticizing.

Further, still include the protective sheath, the internal diameter of protective sheath is greater than the external diameter of criticizing first storehouse tail end, form between the inside wall of protective sheath and criticizing first storehouse tail end lateral wall and to hold the space of criticizing first front end tip.

Furthermore, a groove is formed in the position, corresponding to each batch head clamp, on the outer circumferential surface of the batch head library, and the grooves can accommodate the batch head clamps and the batch heads at the same time. Preferably, a magnet is arranged in the groove.

Further, the hinge shaft is annular, the hinge shaft is coaxially installed at the front end of the batch head library, and the plurality of batch head clips surround the front end of the batch head library and are simultaneously hinged on the hinge shaft; the front end of the through hole is provided with a step, an annular groove is formed in the annular side wall of the step, and the hinge shaft is embedded into the annular groove.

Furthermore, a prismatic hole is formed in the front end face of the screwdriver head connecting rod, and the tail end of the screwdriver head connecting rod is coaxially and fixedly connected with a power output shaft of the automatic screwdriver.

In view of this, the second objective of the present invention is to provide a batch head, which can be quickly mounted on the batch head clamp of the batch head fast switching device, and also can be quickly dismounted from the batch head clamp of the batch head fast switching device, so as to significantly improve the batch head replacement efficiency of the batch head fast switching device.

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

the utility model discloses a criticize the head, criticize the middle part of head or be close to the position department of criticizing first tail end and be provided with the ring channel, criticizing the installation position of head clamp and having the jack catch that is C shape, the jack catch has certain elasticity, the internal diameter of jack catch is greater than the external diameter of criticizing the head and is located ring channel tank bottom department, is less than the external diameter of criticizing first ring channel notch outside edge, criticize first accessible the ring channel joint is in on the jack catch.

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

In view of the above, the third objective of the present invention is to provide an automatic screwdriver, which can significantly improve the replacement efficiency of bits.

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

the utility model discloses an automatic bottle opener, including the casing of taking the handle, set up the motor in the casing, criticize the rear end of first connecting rod with the power take off hub connection of motor, the tail end of fixed sleeve tail end and protective sheath all with the front end fixed connection of casing.

The utility model has the advantages that:

1. the utility model discloses a criticize first fast switch over device with a plurality of criticizing the head install criticize the front end outside circumference in first storehouse upward, not only can change its criticize the head on the head clamp at will, need not to rotate criticizing the head storehouse and aim at and adjust criticizing the head when the work is switched criticizing the head moreover, only need directly to criticize the head of selecting on the head clamp and dial out and can accomplish the switching, its switching efficiency is showing and is improving.

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

3. The utility model discloses a criticize head, its advantage can install fast and criticize first quick switching control device criticize on the head presss from both sides, also can dismantle from criticizing first quick switching control device's criticizing the head clamp fast and get off to show that to improve criticize first quick switching control device criticize first change efficiency.

4. The utility model discloses an automatic bottle opener can show the ground and improve batch head and change efficiency.

Drawings

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

Fig. 1 is a schematic structural diagram of the batch head quick switching device of the present invention, wherein a batch head is installed on a batch head library;

fig. 2 is a schematic structural view of the batch head quick switching device and the automatic screw driver of the present invention, in which a batch head clamp on the batch head library is in an opening state;

fig. 3 is a schematic structural view of the batch head quick switching device and the automatic screw driver of the present invention, in which a batch head clamp on the batch head library is in a state of swinging to the front end of the through hole;

fig. 4 is a schematic structural view of the quick batch head switching device and the automatic screw driver of the present invention, in which a batch head on the batch head clamp is in a state of being connected with a batch head connecting rod;

FIG. 5 is an enlarged view of the structure shown in area A of FIG. 4;

fig. 6 is the three-dimensional structure schematic diagram of the screwdriver head clamp in the screwdriver head fast switching device of the utility model

Fig. 7 is a schematic three-dimensional structure diagram of the batch head library in the batch head fast switching device of the present invention;

fig. 8 is a schematic perspective view showing a connection relationship between the batch head, the batch head clamp and the hinge shaft in the rapid batch head switching device according to the present invention;

fig. 9 is a schematic view of a three-dimensional explosion structure of the batch head fast switching device of the present invention;

FIG. 10 is a schematic perspective view of the bit fast switching device of the present invention in relation to an automatic screw driver during assembly;

fig. 11 is a schematic view of the three-dimensional structure of the screwdriver head fast switching device and the automatic screwdriver after assembling.

Detailed Description

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

embodiment 1 batch head fast switching device

As shown in fig. 1-11: the utility model discloses a batch head fast switching device, including batch head storehouse 1 used for carrying a plurality of batch heads and batch head connecting rod 2 used for being connected with the batch heads, the middle part of batch head storehouse 1 is provided with through-hole 3, batch head connecting rod 2 is coaxial to be set up in through-hole 3; the batch head library is cylindrical, a plurality of batch head clamps 4 are circumferentially arranged on the outer side of the front end of the batch head library, a hinge shaft 5 is coaxially arranged at the front end of the batch head library, one end of each batch head clamp is hinged to the batch head library through the hinge shaft, an installation position 41 capable of clamping the batch head is arranged at the other end of each batch head clamp, the installation position is used for fixedly connecting the batch head to the batch head clamps in the axial direction and allowing the batch head to rotate on the installation position, the installation position 41 can swing around the hinge shaft 5 to the front of the through hole 3 to enable the axis of the batch head 6 to be coaxial with the axis of the batch head connecting rod 2, and the batch head library 1 realizes reciprocating movement along the axial direction of the batch head connecting rod through a sliding fit component; when the axle center of the batch head is coaxial with the axle center of the batch head connecting rod, the batch head library moves backwards relative to the batch head connecting rod, so that the front end of the batch head connecting rod is in transmission connection with the batch head. The axis of the through hole 3 can be consistent with the axis of the batch head library 1, the batch head library 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 library, the eccentric arrangement is also possible, and the batch head can be swung to the front of the through hole after the batch head clamp swings. Specifically, criticize the head and press from both sides can be made by the plastics material that has certain toughness, criticize the installation position of head clamp and have the jack catch that is C shape, the jack catch has certain elasticity, the internal diameter of jack catch is greater than the external diameter of criticizing the head and is located annular groove tank bottom department, is less than the external diameter of criticizing first annular groove notch outside edge. The end face of the front end of the screwdriver head connecting rod is provided with a prismatic hole, and the end part of the tail end of the screwdriver head connecting rod is coaxially and fixedly connected with a power output shaft of the automatic screwdriver motor. In order to facilitate the movement of the batch head magazine 1, a push rod 26 may be provided at a side of the batch head magazine 1, and one end of the push rod extends to a position close to the handle of the automatic screwdriver.

As shown in fig. 1, the sliding fit assembly comprises a fixed sleeve 7 and a sliding sleeve 8, the fixed sleeve 7 is sleeved on the batch head connecting rod, and the fixed sleeve 7 is in running fit with the batch head connecting rod; 8 covers of sliding sleeve are established on fixed sleeve 7, sliding sleeve 8 is at fixed sleeve 7 axial and between fixed sleeve 7 sliding fit, the coaxial fixed mounting of sliding sleeve is in criticizing the through-hole 3 in first storehouse, and the sliding sleeve passes through the buckle with criticizing first storehouse tail end and is connected. Specifically, the fixed sleeve is the cylinder, be provided with flange 9 on the outer periphery of fixed sleeve front end, the cover is equipped with reset spring 10 on the fixed sleeve, reset spring's one end bullet is supported on the flange, reset spring's the other end bullet is supported on the sliding sleeve, reset spring gives sliding sleeve one is to the power that the fixed sleeve tail end removed. Alternatively, the sliding sleeve may be provided with a force moving towards the tail end of the fixed sleeve by a magnetic force, specifically, a magnet may be disposed at the tail end of the sliding sleeve or the batch head magazine, a ferromagnetic material may be disposed on the automatic screwdriver housing at the tail end of the batch head magazine, and when the magnet at the tail end of the sliding sleeve or the batch head magazine is close to the ferromagnetic material on the automatic screwdriver housing, the sliding sleeve may be moved towards the ferromagnetic material.

The utility model discloses a criticize first fast switch-over device's theory of operation: when the screwdriver is installed, the screwdriver head connecting rod is connected with a motor power output shaft of the automatic screwdriver, the tail end of the fixed sleeve is fixedly connected with the front end of the shell, and then the plurality of screwdriver heads are installed on the screwdriver head library; when the batch heads are switched, the batch head library is pushed by hands to move forwards, so that the batch heads which are in inserted connection and matching with the batch head connecting rods can be separated from the batch head connecting rods, and the separated batch heads are returned to the outer side of the batch head library; then the newly selected batch head is pulled to swing forwards to the front of the through hole around the hinge shaft, and the batch head library moves backwards under the action of the reset spring, so that the tail end of the batch head positioned in front of the through hole is in plug-in fit with the batch head connecting rod in the through hole, and the batch head is quickly switched.

As a further improvement of the technical scheme, the batch head connecting rod is cylindrical, and balls 11 are arranged between the inner side wall of the fixed sleeve and the outer side wall of the batch head connecting rod to form a ball bearing structure. Specifically, set up two ring channels on criticizing first connecting rod side by side, establish spacing snap ring 12 on the ring channel is overlapped, will be two and set up around criticizing the ball that first connecting rod set up fixed sleeve's inside wall and criticize between the first connecting rod lateral wall, the position that two are listed as the ball is located between two ring channels, sets up the stop collar between two and is used for injecing the ball position, thereby fixed sleeve's inside wall and criticize and form the ball bearing structure between the first connecting rod lateral wall. The stability of the fixing sleeve can be enhanced through the ball bearing structure.

As a further improvement of the above technical solution, as shown in fig. 5, a fixed backer a13 is provided at the front end of the batch head library, a movable backer a14 is provided on the batch head clip, when the batch head clip swings to the front end of the through hole, the movable backer a14 abuts against the fixed backer a13, and at this time, the batch head axis on the batch head clip is coaxial with the batch head connecting rod. Through the arrangement, the batch head and the batch head connecting rod can be quickly aligned and connected, so that the switching operation is convenient.

As a further improvement of the above technical solution, a fixed backer B15 is further disposed at one end of the fixed sleeve close to the batch head clip, a movable backer B16 is disposed on the batch head clip, and when the movable backer B16 is in contact with the fixed backer B15, the rotation of the batch head clip on the hinge shaft can be limited. When the position of the batch head clamp is locked, the friction force between the batch head clamp and the batch head is reduced to the maximum extent when the batch head rotates on the mounting position.

As a further improvement of the technical scheme, the batch head warehouse structure further comprises a protective sleeve 17, wherein the inner diameter of the protective sleeve is larger than the outer diameter of the tail end of the batch head warehouse, and a space capable of containing the end part of the front end of the batch head warehouse is formed between the inner side wall of the protective sleeve and the outer side wall of the tail end of the batch head warehouse by keeping a distance of more than 1 cm. Through setting up the protective sheath for when criticizing first storehouse and not moving forward, criticize under the condition that first front end still is located the protective sheath, criticize the head and can't be broken off with the fingers and thumb, thereby avoid damaging criticizing first storehouse because of misoperation. The protective sheath can adopt ferromagnetic material to make, sets up magnet on criticizing first storehouse, through the magnetic attraction between magnet and the protective sheath can play the effect of replacing reset spring.

As a further improvement of the above technical solution, a groove 18 is formed in the outer circumferential surface of the batch head magazine at a position corresponding to each batch head clip, and the groove can accommodate the batch head clips and the batch heads at the same time. The cross section of the groove is in a semicircular arc shape, the length direction of the groove is generally consistent with the length direction of the batch head connecting rod, and a certain included angle can be formed between the length direction of the groove and the length direction of the batch head connecting rod. Preferably, a magnet is arranged in the groove, and the screwdriver bit can be firmly attracted in the groove by arranging the magnet or enabling the groove to have certain magnetism, so that the screwdriver bit is prevented from falling off from the screwdriver bit clamp.

As a further improvement of the above technical solution, the articulated shaft is annular, the articulated shaft is coaxially installed at the front end of the batch head warehouse, and the plurality of batch head clips are simultaneously articulated on the articulated shaft around the front end of the batch head warehouse; the front end of the through hole is provided with a step 19, the annular side wall of the step is provided with an annular groove 20, and the hinge shaft is embedded into the annular groove. Specifically, center on the front end terminal surface of criticizing first storehouse center of axle center of through-hole has seted up a plurality of openings 21, the opening will be criticized the outer periphery and the ring channel intercommunication of first storehouse front end, the one end of criticizing first clamp 4 possesses platykurtic otic placode 42, and otic placode thickness is less than the opening width, is provided with through-hole 43 above the otic placode, during the installation, passes the through-hole on the otic placode with the articulated shaft earlier to this hangs a plurality of criticizing first clamps on the articulated shaft in proper order, then makes the position of every criticizing first clamp and every open-ended position one-to-one, imbeds the ring shape articulated shaft into the ring channel in, makes and criticize first clamp otic placode imbeds in the opening thereupon, thereby lets the one end of criticizing first clamp.

As a further improvement of the technical scheme, the batch head warehouse is characterized by further comprising a torsion spring 22, one end of the torsion spring is connected with the batch head warehouse, the other end of the torsion spring is connected with the batch head clamp, and the torsion spring gives force to the batch head clamp to swing towards the rear end of the batch head warehouse. In this embodiment, the middle part winding of torsional spring is on the articulated shaft, 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 storehouse, the other end is fixed on criticizing first clamp, more specifically, can be close to the opening part at the front end of criticizing first storehouse and set up a recess 45, stretch out the one end of torsional spring from the opening part after then buckle to the recess in the one end of fixed torsional spring, can set up a arch 44 in the otic placode side of criticizing first clamp, make the other end bullet of torsional spring support in the arch, when removing criticizing first storehouse and making criticize first connecting rod and criticize first separation, under the effect of torsional spring, criticize the head and will press from both sides automatic. 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 batch head magazine, the other end of the tension spring or the spring is connected to the batch head clamp, and in an initial state of the tension spring or the spring, the batch head clamp is only required to be positioned on the outer circumferential surface of the batch head magazine by applying a certain force to the batch head clamp.

EXAMPLE 2A Screwdriver bit

As shown in fig. 8: criticize head 6 in this embodiment, criticize the middle part of head or be close to the position department of criticizing first tail end and be provided with ring channel 61, criticize the installation position 41 of head clamp 4 and have the jack catch 42 that is C shape, the jack catch has certain elasticity, the internal diameter of jack catch is greater than the external diameter that criticizes the head and is located ring channel tank bottom department, is less than the external diameter of criticizing first ring channel notch outside edge, criticize the head accessible ring channel 61 joint is in on the jack catch 42. The utility model discloses a criticize head, its advantage can install fast and criticize first quick switching control device criticize on the head presss from both sides, also can dismantle from criticizing first quick switching control device's criticizing the head clamp fast and get off to show that to improve criticize first quick switching control device criticize first change efficiency.

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

EXAMPLE 3 an automatic opener

As shown in fig. 2-4, 9-10: the automatic screw driver in the embodiment comprises a shell 23 with a handle and a motor arranged in the shell, wherein the rear end of the screwdriver head connecting rod is connected with a power output shaft 24 of the motor, and the tail end of the fixing sleeve and the tail end of the protective sleeve are fixedly connected with the front end of the shell. The utility model discloses an automatic bottle opener can show the ground and improve batch head and change efficiency. For the automatic screw driver with the torsion adjusting device installed at the front end of the casing, the tail end of the fixing sleeve and the tail end of the protective sleeve can be both fixedly connected with the casing 25 of the torsion adjusting device on the automatic screw driver, specifically, an annular end cover 71 for fixing the sleeve 7 and the casing 25 can be arranged between the tail end of the fixing sleeve 7 and the casing 25, and the annular end cover 71 is connected with the fixing sleeve 7 in a buckling manner.

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 (10)

1. The utility model provides a criticize first quick switching device, including be used for carrying a plurality of criticize first storehouse of criticizing and be used for with criticize first connecting rod of being connected, its characterized in that: a through hole is formed in the middle of the batch head library, and the batch head connecting rod is coaxially arranged in the through hole; the outer side of the front end of the batch head library is circumferentially provided with a plurality of batch head clamps, the front end of the batch head library is coaxially provided with a hinged shaft, one end of each batch head clamp is hinged to the batch head library through the hinged shaft, the other end of each batch head clamp is provided with an installation position capable of clamping a batch head, each installation position is used for fixedly connecting the batch head to the batch head clamp in the axial direction and allowing the batch head to rotate on the installation position, and the installation position can swing around the hinged shaft to the front of the through hole to enable the axis of the batch head to be coaxial with the axis of the batch head connecting rod; the batch head warehouse can realize the reciprocating movement along the axial direction of the batch head connecting rod through the sliding fit component; when the axle center of the batch head is coaxial with the axle center of the batch head connecting rod, the batch head library moves backwards relative to the batch head connecting rod, so that the front end of the batch head connecting rod is in transmission connection with the batch head.

2. The batch head fast switching device according to claim 1, characterized in that: the sliding fit assembly comprises a fixed sleeve and a sliding sleeve, the fixed sleeve is sleeved on the screwdriver head connecting rod, and the fixed sleeve is in rotating fit with the screwdriver head connecting rod; the sliding sleeve is sleeved on the fixed sleeve, the sliding sleeve is in sliding fit with the fixed sleeve in the axial direction of the fixed sleeve, and the sliding sleeve is coaxially and fixedly installed in the through hole of the batch head warehouse.

3. The batch head fast switching device according to claim 2, characterized in that: the batch head warehouse is characterized by further comprising a torsion spring, one end of the torsion spring is connected with the batch head warehouse, the other end of the torsion spring is connected with the batch head clamp, and the torsion spring gives force for swinging the batch head clamp to the rear end of the batch head warehouse.

4. The batch head fast switching device according to claim 3, characterized in that: the front end of the batch head library is provided with a fixed backer A, the batch head clamp is provided with a movable backer A, when the batch head clamp swings to the front end of the through hole, the movable backer A abuts against the fixed backer A, and the batch head axis on the batch head clamp is coaxial with the batch head connecting rod.

5. The batch head fast switching device according to claim 3, characterized in that: the fixed sleeve is provided with a fixed backer B at one end close to the screwdriver head clamp, the screwdriver head clamp is provided with a movable backer B, and when the movable backer B is in a contact state with the fixed backer B, the screwdriver head clamp can be limited to rotate on the hinge shaft.

6. The batch head fast switching device according to claim 2, characterized in that: still include the protective sheath, the internal diameter of protective sheath is greater than the external diameter of criticizing first storehouse tail end, form between the inside wall of protective sheath and the first storehouse tail end lateral wall of criticizing and to hold the space of criticizing first front end tip.

7. The batch head fast switching device according to claim 1, characterized in that: the batch head warehouse is characterized in that a groove is formed in the position, corresponding to each batch head clamp, on the outer circumferential surface of the batch head warehouse, and the grooves can accommodate the batch head clamps and the batch heads at the same time.

8. The batch head fast switching device according to claim 1, characterized in that: the articulated shaft is in a ring shape, the articulated shaft is coaxially arranged at the front end of the batch head warehouse, and the plurality of batch head clips are simultaneously articulated on the articulated shaft around the front end of the batch head warehouse; the front end of the through hole is provided with a step, an annular groove is formed in the annular side wall of the step, and the hinge shaft is embedded into the annular groove.

9. A batch head mountable in the batch head quick switching apparatus according to any one of claims 1 to 8, wherein: criticize first middle part or be close to the position department of criticizing first tail end and be provided with the ring channel, criticize the installation position of head clamp and have the jack catch that is C shape, the jack catch has certain elasticity, the internal diameter of jack catch is greater than the external diameter that criticizes the head and is located ring channel tank bottom department, is less than the external diameter of criticizing first ring channel notch outside edge, criticize first accessible the ring channel joint is in on the jack catch.

10. An automatic screwdriver provided with the batch head quick switching device as claimed in any one of claims 1 to 8, comprising a shell with a handle and a motor arranged in the shell, wherein: the rear end of the screwdriver head connecting rod is in transmission connection with a power output shaft of the motor, and the tail end of the fixed sleeve and the tail end of the protective sleeve are both fixedly connected with the front end of the shell.

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