Electric tool changer

Abstract

The utility model belongs to the technical field of assembling and disassembling tools of cutters, and particularly relates to an electric cutter changer which comprises a shell, a positioning hole used for positioning and placing a cutter handle is formed in the shell, positioning plug pins are movably assembled on the two radial sides of the positioning hole in the shell respectively, and a linkage mechanism connected with the two positioning plug pins is arranged in the shell. The linkage mechanism is used for driving the two positioning bolts to simultaneously extend into or retreat from the positioning holes; a central shaft capable of moving up and down relative to the shell is rotationally assembled at the position, corresponding to the positioning hole, in the shell, and a driving motor used for driving the central shaft to rotate is arranged below the positioning hole in the shell; the top of the center shaft is connected with a bit used for being matched with a locking screw in the cutter handle in a rotation stopping mode. A battery electrically connected with the driving motor is arranged in the shell, and a charging port electrically connected with the battery is formed in the shell; or the shell is provided with a power line electrically connected with the driving motor. According to the device, the cutter fixed on the rear end screw tensioning type cutter handle can be automatically disassembled and assembled, and the disassembling and assembling efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the tool for assembling and disassembling cutters, and particularly relates to an electric cutter changer. BACKGROUND

[0002] The rear-end screw tension type cutter holder is a clamping device for fixing cutters by applying clamping force through screws, and the cutter holder can clamp cutters such as CVJ ball milling cutters, reamers and boring cutters.

[0003] The locking screw in the rear-end screw tension type cutter holder is generally a fine tooth screw, and a large number of turns need to be twisted when the cutter is disassembled and assembled, which is very time-consuming. In addition, since there is no suitable cutter holder locking seat, when the cutter is disassembled and assembled, one hand needs to hold the cutter holder and the other hand needs to hold a T-shaped wrench, and there is a risk of dropping the cutter and the tool, which reduces the installation efficiency of the cutter. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing an electric cutter changer to solve the technical problem of low disassembly and assembly efficiency when the existing cutter is fixed on the rear-end screw tension type cutter holder.

[0005] To solve the above problems, the utility model provides an electric cutter changer which adopts the following technical scheme:

[0006] An electric cutter changer comprises a shell, the shell is provided with a positioning hole for positioning and placing a cutter holder, the shell is movably provided with a positioning pin on each of the two sides of the positioning hole in the radial direction of the positioning hole, the shell is provided with a linkage mechanism connected with the two positioning pins, and the linkage mechanism is used for driving the two positioning pins to simultaneously extend into or exit from the positioning hole;

[0007] A central shaft capable of moving up and down relative to the shell is rotatably arranged in the shell at a position corresponding to the positioning hole, and a drive motor is arranged in the shell below the positioning hole and used for driving the central shaft to rotate; a punch head used for rotationally cooperating with a locking screw in the cutter holder is connected to the top of the central shaft.

[0008] The shell is provided with a battery electrically connected with the drive motor, and the shell is provided with a charging port electrically connected with the battery; or the shell is provided with a power line electrically connected with the drive motor.

[0009] The beneficial effect is that: the electric tool changer is used, the shank is placed in the positioning hole, the shank is positioned by two positioning pins, at this time, the chuck can cooperate with the locking screw in the shank; when there is a tool in the shank, the driving motor is started, the driving motor is forward rotated and drives the chuck to rotate through the central shaft, the chuck drives the locking screw to exit from the tool when rotating, and the tool is disassembled; when there is no tool in the shank, the tool can be inserted into the shank, the driving motor is reversed, the locking screw in the shank is screwed into the tool, and the tool is quickly installed. The utility model can realize the quick installation and disassembly of the tool on the rear end screw tension type shank, without manual rotation through the wrench tool, and the disassembly efficiency of the tool is improved.

[0010] Further, the linkage mechanism comprises a pressing piece and two crank arms, the pressing piece is movably assembled with the shell in the direction perpendicular to the axis of the positioning hole, one end of each of the two crank arms is hinged to the pressing piece, and the other end of each of the two crank arms is hinged to the two positioning pins, and the two crank arms are rotatably assembled with the shell.

[0011] Beneficial effect: the linkage mechanism has a simple structure, synchronous actions of the two positioning pins can be realized by pressing or releasing the pressing piece, the operation is convenient, and the installation is simple.

[0012] Further, the end face of the insertion end of the positioning pin is a bevel.

[0013] Beneficial effect: the shank can be conveniently put in and locked, repeated operation is reduced, and the efficiency is improved.

[0014] Further, a reset spring is sleeved outside each positioning pin, one end of the reset spring is connected with the positioning pin, the other end of the reset spring is connected with the shell, and the insertion end of each positioning pin is located in the positioning hole in a natural state of the reset spring.

[0015] Beneficial effect: during the process of putting in or taking out the shank, only one operation of pressing the pressing piece is needed under the action of the reset spring, and the efficiency is higher.

[0016] Further, a transmission shaft is drivingly connected to the output shaft of the driving motor, the central shaft is rotationally matched with the transmission shaft and is slidingly assembled in the up-down direction, the central shaft is rotatably assembled with the shell through a bearing, and the central shaft and the bearing are slidingly matched in the up-down direction, a compression spring is sleeved above the bearing on the central shaft, an upper limiting piece in contact with the top end of the compression spring is clamped on the central shaft, and a lower limiting piece is clamped below the bearing on the central shaft, and the active stroke of the central shaft relative to the transmission shaft is not less than the maximum compression amount of the compression spring.

[0017] Beneficial effects: It can ensure that the chuck is always in contact with the locking screw in the handle during rotation to transmit torque; in addition, the upper limiting piece can limit the downward stroke of the center shaft, and the lower limiting piece can prevent the center shaft from being separated from the transmission shaft upward under the action of the compression spring, thereby ensuring the stability of power transmission between the center shaft, the chuck and the transmission shaft.

[0018] Further, the chuck and the center shaft are detachably connected.

[0019] Beneficial effects: Different chucks can be replaced to adapt to different specifications of locking screws, and the versatility is strong.

[0020] Further, the top of the center shaft is provided with a chuck interface matched with the chuck, the chuck and the chuck interface are inserted and matched, and the transmission shaft is embedded with a magnet for adsorbing the chuck.

[0021] Beneficial effects: It is convenient to install and dismount different chucks.

[0022] Further, the shell comprises a positioning shell and a charging shell which are detachably connected together, the driving motor is arranged in the charging shell, and the positioning hole, the positioning pin, the linkage mechanism, the transmission shaft and the chuck are arranged in the positioning shell.

[0023] Beneficial effects: The positioning shell can be replaced by different specifications of positioning shells to adapt to different handles, thereby improving the versatility of the electric tool changer.

[0024] Further, the positioning shell and the charging shell are both cylindrical shells, and the outer diameter of the positioning shell is the same as that of the charging shell.

[0025] Beneficial effects: It is beautiful in appearance and convenient to manufacture.

[0026] Further, the bottom of the positioning shell is provided with a ring groove, the top of the charging shell is provided with a protrusion matched with the ring groove, a rotating buckle structure is arranged between the ring groove and the protrusion, and a plurality of circumferentially distributed check screws are further arranged between the positioning shell and the charging shell, and the positions of the check screws correspond to those of the protrusions.

[0027] Beneficial effects: It is convenient to install and dismount the positioning shell and the charging shell, and there is no obvious component protruding on the appearance.

[0028] Further, two handle grooves are arranged in the circumferential direction of the charging shell.

[0029] Beneficial effects: It is convenient for manual carrying. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0031] Figure 1 This is a first-view perspective three-dimensional structural diagram of the electric tool changer of this utility model;

[0032] Figure 2 This is a second-view three-dimensional structural diagram of the electric tool changer of this utility model;

[0033] Figure 3 This is a cross-sectional view of the electric tool changer of this utility model;

[0034] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0035] Figure 5 This is a schematic diagram of the assembly between the linkage mechanism and the two positioning pins.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Positioning housing; 2. Charging housing; 3. Positioning hole; 4. Positioning pin; 5. Angled surface; 6. Crank arm; 7. Button; 8. Drive motor; 9. Central shaft; 10. Transmission shaft; 11. Bearing; 12. Compression spring; 13. Upper limit component; 14. Lower limit component; 15. Rocker switch; 16. Handle groove; 17. Battery; 18. Charging port; 19. Bottom cover; 20. Power display module; 21. Anti-loosening screw; 22. Locking pin; 23. Cylinder liner; 24. Bit interface. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0040] Example 1 of the electric tool changer provided by this utility model:

[0041] like Figure 1 and Figure 2As shown, an electric tool changer includes a housing, a positioning pin 4 disposed within the housing, a linkage mechanism, a bit, a central shaft 9, a transmission shaft 10, a drive motor 8, and a battery 17.

[0042] The housing is a detachable structure, including a bottom cover 19, a charging housing 2 connected above the bottom cover 19, and a positioning housing 1 connected above the charging housing 2. Both the charging housing 2 and the positioning housing 1 are cylindrical housings with equal outer diameters; the bottom cover 19 is a cylindrical bottom cover with an outer diameter equal to that of the positioning housing 1.

[0043] The positioning housing 1 has a positioning hole 3 for positioning and placing the tool holder. Inside the positioning housing 1, on both radial sides of the positioning hole 3, are movable pin holes. Two positioning pins 4 are movably fitted into these movable pin holes, arranged opposite to each other, with the insertion end face of each pin 4 being a bevel 5. Each positioning pin 4 is fitted with a return spring, one end of which is connected to the positioning pin 4, and the other end is connected to the positioning housing 1. Figure 5 As shown, the other ends of the two positioning pins 4 are connected to a linkage mechanism. In this embodiment, the linkage mechanism includes a pressing element and two crank arms 6. The pressing element is a button 7, which is disposed on the surface of the positioning housing 1 and can move in a direction perpendicular to the axis of the positioning hole 3. One end of each of the two crank arms 6 is hinged to the button 7, and the other end of each of the two crank arms 6 is hinged to the two positioning pins 4 respectively. The middle part of the two crank arms 6 is rotatably assembled with the positioning housing 1 via a rotating shaft. In the natural state, the insertion ends of the two positioning pins 4 are located in the positioning hole 3. When the button 7 is pressed, the crank arm 6 rotates and pulls the positioning pin 4 out of the positioning hole 3. To improve the service life of the electric tool changer, such as Figure 2 As shown, a cylinder liner 23 is also installed inside the positioning hole 3 to increase wear resistance.

[0044] like Figure 3 As shown, both the drive motor 8 and the battery 17 are fixed inside the charging housing 2, and the drive motor 8 and the battery 17 are electrically connected. The charging housing 2 is also provided with a charging port 18 that is electrically connected to the battery 17. The charging port 18 is a Type-C port, which can charge the battery 17 when a charging cable is inserted. The drive motor 8 is driven by a planetary reduction gearbox. The planetary reduction gearbox does not have an anti-reverse structure. The output shaft of the drive motor 8 extends into the positioning housing 1, and a transmission shaft 10 is connected to the output shaft. The transmission shaft 10 is coaxial with the positioning hole 3.

[0045] like Figure 4As shown, a bearing 11, a deep groove ball bearing, is installed at the bottom of the positioning hole 3. A central shaft 9 is mounted on the bearing 11 via a sliding clearance fit. The central shaft 9 can rotate relative to the positioning housing 1 via the bearing 11, and can also move axially up and down. A compression spring 12 is sleeved on the central shaft 9 above the bearing 11, and an upper limit stop 13 is engaged on the central shaft 9, contacting the top of the compression spring 12. A lower limit stop 14 is engaged on the central shaft 9 below the bearing 11. Both the upper limit stop 13 and the lower limit stop 14 are retaining springs.

[0046] The lower end of the central shaft 9 is provided with a transmission interface, and the upper end of the transmission shaft 10 is inserted into the transmission interface. The transmission interface is a hexagonal hole. The central shaft 9 transmits torque by engaging with the transmission shaft 10 through the hexagonal hole to prevent rotation. At the same time, the central shaft 9 can slide up and down relative to the transmission shaft 10 through the hexagonal hole. In this embodiment, the axial mobility of the central shaft 9 relative to the transmission shaft 10 is greater than the maximum compression of the compression spring 12. Of course, in other embodiments, the axial mobility of the central shaft 9 relative to the transmission shaft 10 can also be equal to the maximum compression of the compression spring 12. In this case, the lower limit member 14 can limit the vertical movement of the central shaft 9, preventing the central shaft 9 from dislodging from the transmission shaft 10.

[0047] The top of the central shaft 9 is equipped with a bit interface 24, which is a hexagonal hole. The output end of the bit is a standard internal hexagonal socket, which can be inserted into the bit interface 24. The central shaft 9 has an embedded magnet for attracting the bit. When the bit is inserted, it can be stably attracted to the central shaft 9 under the action of the magnet. Under a large pulling force, the bit can be pulled out from the bit interface 24, thus allowing for the replacement of different sizes of bits. The output ends of different sizes of bits are all standard internal hexagonal sockets; only the input end specifications differ, ensuring that all can be assembled with the central shaft 9. It can also accommodate different sizes of locking screws, improving the versatility of the electric tool changer.

[0048] A rocker switch 15, electrically connected to the drive motor 8, is located below the button on the positioning housing 1. The rocker switch 15 has three positions: 1 (forward rotation), 2 (reverse rotation), and 0 (reset). When switched to position 1, the drive motor 8 rotates forward for tool installation; when switched to position 2, the drive motor 8 rotates in reverse for tool removal. A power display module 20 is located on the top of the positioning housing 1, allowing for easy viewing of the battery 17's power percentage and preventing damage to the battery 17 due to low voltage.

[0049] like Figure 1 and Figure 2 As shown, the charging housing 2 has two handle grooves 16 in the circumferential direction, which makes it easy for personnel to move the entire electric tool changer to different positions.

[0050] In this embodiment, the bottom cover 19 and the charging housing 2 are detachably connected by screws, and the positioning housing 1 and the charging housing 2 are detachably connected. The bottom of the positioning housing 1 has an annular groove, and the top of the charging housing 2 has a protrusion that mates with the annular groove. A rotating latch structure is provided between the annular groove and the protrusion. The rotating latch structure includes a locking pin 22 vertically connected to the positioning housing 1 and corresponding to the annular groove, and an L-shaped slot on the protrusion. The L-shaped slot includes an axial vertical section and a circumferential horizontal section. The locking pin 22 can slide within the axial vertical section and the circumferential horizontal section. When the positioning housing 1 is inserted into the protrusion, the locking pin 22 enters the axial vertical section. Then, the positioning housing 1 is rotated to allow the locking pin 22 to slide within the circumferential horizontal section until it reaches the end of the axial horizontal section. Multiple circumferential anti-loosening screws 21 prevent loosening between the positioning housing 1 and the charging housing 2.

[0051] In actual use, the tool holder is inserted into the positioning hole 3. When inserted, the tool holder presses against the inclined surface 5 on the positioning pin 4, causing the two positioning pins 4 to disengage from the positioning hole 3. The tool holder is rotated until the two insertion holes on the tool holder are aligned with the two positioning pins 4. At this time, under the action of the return spring, the two positioning pins 4 extend into the two insertion holes of the tool holder, thus positioning the tool holder. During the process of inserting the tool holder into the positioning hole 3, the input end of the bit contacts and engages with the locking screw in the tool holder under the action of the compression spring 12. When there is a tool in the tool holder, the rocker switch 15 is switched to position 1, the drive motor 8 rotates forward, and the drive center shaft 9 drives the bit to rotate. When the bit rotates, it drives the locking screw to disengage from the tool, thus removing the tool. When there is no tool in the tool holder, the tool can be inserted into the tool holder first, and the rocker switch 15 is switched to position 2. The locking screw in the tool holder is then screwed into the tool, thus installing the tool. After the tool is installed, press button 7 to pull out the two positioning pins 4 from the tool holder and remove the tool holder from the positioning hole 3.

[0052] This invention enables the quick installation and removal of cutting tools. The cutting tools used here are those that are tightened by a rear-end screw, such as CVJ ball end mills, boring tools with shanks, and reamers.

[0053] Embodiment 2 of the electric tool changer provided by this utility model:

[0054] Its main difference from Example 1 is:

[0055] In Example 1, the linkage mechanism includes a pressing component and two crank arms.

[0056] In this embodiment, the linkage mechanism is a linkage structure of two sliders, two connecting rods, and a driving component. Two positioning pins are fixedly connected to the two sliders respectively, and the sliders can slide in fixed guide holes. One end of each of the two connecting rods is hinged to the two sliders respectively, and the other end is hinged to the output end of the driving component.

[0057] Example 3 of the electric tool changer provided by this utility model:

[0058] Its main difference from Example 1 is:

[0059] In Example 1, the housing contains a battery that is electrically connected to the drive motor, and the housing has a charging port that is electrically connected to the battery.

[0060] In this embodiment, no battery is installed inside the housing; instead, a power cable electrically connected to the drive motor is directly installed.

[0061] In the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

[0062] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electric tool changer, characterized in that, The device includes a housing with a positioning hole for positioning and placing a tool holder. Positioning pins for inserting into corresponding holes on the tool holder are movably mounted on both radial sides of the positioning hole inside the housing. The housing also includes a linkage mechanism connected to the two positioning pins. The linkage mechanism is used to drive the two positioning pins to simultaneously extend into the positioning hole or simultaneously withdraw from the positioning hole. A central shaft capable of moving up and down relative to the housing is rotatably mounted inside the housing at the position corresponding to the positioning hole. A drive motor for driving the central shaft to rotate is provided inside the housing below the positioning hole. The top of the central shaft is connected to a bit for anti-rotation engagement with the locking screw in the tool holder; The housing contains a battery that is electrically connected to the drive motor, and the housing has a charging port that is electrically connected to the battery; or, the housing has a power cord that is electrically connected to the drive motor.

2. The electric tool changer according to claim 1, characterized in that, The linkage mechanism includes a pressing component and two crank arms. The pressing component is movably assembled with the housing in an axial direction perpendicular to the positioning hole. One end of each of the two crank arms is hinged to the pressing component, and the other end of each of the two crank arms is hinged to two positioning pins respectively. Both crank arms are rotatably assembled with the housing.

3. The electric tool changer according to claim 2, characterized in that, The insertion end face of the positioning pin is beveled.

4. An electric tool changer according to claim 2, characterized in that, Each positioning pin is fitted with a return spring. One end of the return spring is connected to the positioning pin, and the other end is connected to the housing. In its natural state, the insertion ends of both positioning pins are located in the positioning holes.

5. An electric tool changer according to any one of claims 1-4, characterized in that, A drive shaft is connected to the output shaft of the drive motor. The central shaft is anti-rotatingly fitted to the drive shaft and is slidably assembled in the vertical direction. The central shaft is rotatably assembled to the housing via a bearing, and the central shaft and the bearing are slidably fitted in the vertical direction. A compression spring is sleeved on the central shaft above the bearing, and an upper limit stop is engaged on the central shaft, contacting the top of the compression spring. A lower limit stop is engaged on the central shaft below the bearing. The travel of the central shaft relative to the drive shaft is not less than the maximum compression of the compression spring.

6. An electric tool changer according to any one of claims 1-4, characterized in that, The bit is detachably connected to the central shaft.

7. An electric tool changer according to claim 6, characterized in that, The top of the central shaft is provided with a bit interface that is compatible with the bit. The bit is inserted into the bit interface, and a magnet for attracting the bit is embedded in the central shaft.

8. An electric tool changer according to any one of claims 1-4, characterized in that, The housing includes a positioning housing and a charging housing that can be detachably connected together. The drive motor is located inside the charging housing, and the positioning hole, positioning pin, linkage mechanism, drive shaft and bit are all located inside the positioning housing.

9. An electric tool changer according to claim 8, characterized in that, Both the positioning housing and the charging housing are cylindrical housings, and the outer diameter of the positioning housing is the same as the outer diameter of the charging housing.

10. An electric tool changer according to claim 8, characterized in that, The bottom of the positioning housing has a ring groove, and the top of the charging housing has a protrusion that mates with the ring groove. A rotating buckle structure is provided between the ring groove and the protrusion. There are also multiple circumferentially distributed anti-loosening screws between the positioning housing and the charging housing, with the anti-loosening screws corresponding to the positions of the protrusions.

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