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 cutter handle positioning seat and a charging shell. Positioning bolts used for being inserted into corresponding inserting holes in the cutter handle are movably assembled on the two radial sides of the positioning hole in the cutter handle positioning base respectively. A central shaft capable of moving up and down relative to the cutter handle positioning seat is rotationally assembled at the position, corresponding to the positioning hole, in the cutter handle positioning seat, and a driving motor used for driving the central shaft to rotate is arranged below the positioning hole in the charging 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 charging shell, and a charging port electrically connected with the battery is formed in the charging shell; or the charging shell is provided with a power line electrically connected with the driving motor. The rear end tensioning type tool can be automatically disassembled and assembled, and the disassembling and assembling efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of cutting tool assembly and disassembly tools, and specifically relates to an electric tool changer. Background Technology

[0002] A rear-end screw-tightening tool holder is a clamping device that uses a screw to apply clamping force to fix the tool. This type of tool holder can clamp tools such as CVJ ball end mills, reamers, and boring tools.

[0003] When cutting tools are severely worn, they need to be removed from the tool holder for replacement. The usual procedure is to remove the tool holder from the machine tool, then use a T-wrench to remove the locking screw from the tool, thus removing it. When replacing a new tool, the locking screw is screwed back into the tool's threaded hole using a T-wrench, thus installing the tool back onto the tool holder. Since the locking screws in rear-end screw-tightened tool holders are generally fine-threaded screws, a large number of turns are required when removing and installing tools, which is very time-consuming. Furthermore, due to the lack of suitable tool holder locking seats, one hand must hold the tool holder and the T-wrench while removing and installing tools, increasing the risk of the tool and tools slipping and falling, thus reducing tool installation efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an electric tool changer to solve the technical problem of low efficiency in the disassembly and assembly of existing rear-end tensioning tool changers.

[0005] To solve the above problems, the electric tool changer provided by this utility model adopts the following technical solution:

[0006] An electric tool changer includes a tool holder positioning seat and a charging housing. The tool holder positioning seat is provided 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 on the tool holder positioning seat.

[0007] A central shaft that can move up and down relative to the tool holder positioning seat is rotatably mounted in the tool holder positioning seat at the position corresponding to the positioning hole. A drive motor for driving the central shaft to rotate is provided in the charging housing below the positioning hole. A bit is connected to the top of the central shaft for anti-rotation engagement with the locking screw in the tool holder.

[0008] The charging case contains a battery that is electrically connected to the drive motor, and the charging case has a charging port that is electrically connected to the battery; or, the charging case has a power cord that is electrically connected to the drive motor.

[0009] The beneficial effects are as follows: When using the electric tool changer of this invention, the tool handle is placed in the positioning hole of the tool handle positioning seat, and the tool handle is positioned by two positioning pins. At this time, the bit can engage with the locking screw in the tool handle. When there is a tool in the tool handle, the drive motor rotates forward, driving the bit to rotate through the central shaft. The rotation of the bit forces the locking screw out of the tool, achieving automatic tool removal. When there is no tool in the tool handle, a tool can be inserted, the drive motor reverses, and the bit screws the locking screw into the tool, achieving automatic installation of the rear-end tensioning tool. After installation, the tool handle can be unlocked by manually pulling out the positioning pins. This invention enables quick installation and removal of rear-end tensioning tools without the need for manual tightening with a wrench, improving the efficiency of rear-end tensioning tool installation and removal.

[0010] Furthermore, a drive shaft is connected to the output shaft of the drive motor, the upper end of which extends into the tool holder positioning seat. The central shaft is anti-rotatingly fitted with the drive shaft and is slidably assembled in the vertical direction. The central shaft is rotatably assembled with the tool holder positioning seat via a bearing, and the central shaft and the bearing are in a sliding clearance fit 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.

[0011] Beneficial effects: It ensures that the bit is always in contact with the locking screw in the tool holder when rotating, so as to transmit torque; in addition, the limiting component can limit the downward travel of the central shaft, and the lower limiting component can prevent the central shaft from disengaging from the drive shaft under the action of the compression spring, thus ensuring the stability of power transmission between the central shaft, bit and drive shaft.

[0012] Furthermore, the bit is detachably connected to the central shaft.

[0013] Beneficial effects: Different bits can be used to adapt to different sizes of locking screws, making it highly versatile.

[0014] Furthermore, the top of the central shaft is provided with a bit interface adapted to the bit, the bit is inserted into the bit interface, and a magnet for attracting the bit is embedded in the central shaft.

[0015] Beneficial effect: Facilitates quick installation and removal of different bit types.

[0016] Furthermore, the positioning hole is also provided with a limiting block for interlocking with the positioning notch on the tool holder.

[0017] Beneficial effects: After the limit block is inserted into the positioning notch on the tool holder, it achieves double limiting and double locking with the positioning pin, making the tool holder locking more reliable.

[0018] Furthermore, one end of the positioning pin extends out of the tool holder positioning seat and is connected to a handle; a return spring is sleeved on the positioning pin, one end of the return spring is connected to the positioning pin, and the other end is connected to the tool holder positioning seat.

[0019] Beneficial effects: It facilitates automatic locking of the tool holder, and after the tool is replaced, the tool holder can be unlocked by manually pulling the handle, making it easy to operate.

[0020] Furthermore, the end face of the positioning pin furthest from the handle is a bevel.

[0021] Beneficial effects: The beveled design makes it easier to insert into the socket of the knife handle. Furthermore, when the knife handle is placed in the positioning hole, the positioning pin can be directly squeezed to move it without manually pulling the handle, making the positioning of the knife handle more convenient.

[0022] Furthermore, the tool holder positioning seat is detachably connected to the charging housing.

[0023] Beneficial effects: Different sizes of tool holder positioning seats can be replaced to accommodate different models of tool holders, improving the versatility of the electric tool changer.

[0024] Furthermore, the tool holder positioning seat includes a base body and a connecting disc disposed at the bottom of the base body, wherein the connecting disc is provided with a plurality of connecting grooves in the circumferential direction; the top of the charging shell is provided with connecting holes corresponding to the connecting grooves one by one.

[0025] Beneficial effect: When the tool holder positioning seat is connected to the charging shell using fasteners, the top of the fastener can be located in the connecting groove without protruding from the connecting disc, resulting in an aesthetically pleasing appearance.

[0026] Furthermore, a jog switch and a three-position adjustment switch are respectively provided on both sides of the base. The jog switch is used to control the start and stop of the drive motor, and the three-position adjustment switch is used to control the forward and reverse rotation of the drive motor.

[0027] Beneficial effect: It enables the electric tool changer to have an error prevention mechanism to prevent accidental start-up. Attached Figure Description

[0028] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments 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:

[0029] Figure 1 This is a three-dimensional structural diagram of the electric tool changer of this utility model;

[0030] Figure 2 This is a front view of the electric tool changer of this utility model;

[0031] Figure 3 This is a top view of the tool holder positioning seat of the electric tool changer of this utility model;

[0032] Figure 4 for Figure 3 AA section view;

[0033] Figure 5 for Figure 3 BB section view;

[0034] Figure 6 This is a top view of the electric tool changer of this utility model (with the tool holder installed).

[0035] Figure 7 for Figure 6 AA section view;

[0036] Figure 8 for Figure 6 BB cross-sectional view.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Tool holder positioning seat; 2. Charging shell; 3. Positioning hole; 4. Positioning pin; 5. Tool holder; 6. Limiting block; 7. Handle; 8. Drive motor; 9. Central shaft; 10. Transmission shaft; 11. Bearing; 12. Compression spring; 13. Upper limit component; 14. Lower limit component; 15. Jog switch; 16. Connecting disc; 17. Battery; 18. Charging port; 19. Bottom cover; 20. Bit interface; 21. Connecting groove; 22. Three-position adjustment switch; 23. Protective cover; 24. Bit; 25. Pin movable hole; 26. Return spring. Detailed Implementation

[0039] 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.

[0040] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0041] Example 1 of the electric tool changer provided by this utility model:

[0042] like Figure 1 and Figure 2As shown, an electric tool changer includes a tool holder positioning seat 1, a charging shell 2, and a bottom cover 19 arranged coaxially from top to bottom.

[0043] Both the charging housing 2 and the bottom cover 19 are cylindrical structures with equal outer diameters, and are detachably connected by screws. The tool holder positioning seat 1 includes a seat body and a connecting disc 16 coaxially connected to the bottom of the seat body. The outer diameter of the seat body is smaller than the outer diameter of the connecting disc 16, and the outer diameter of the connecting disc 16 is equal to that of the charging housing 2. The connecting disc 16 has multiple connecting grooves 21 on its circumference, and the top of the charging housing 2 has connecting holes corresponding to these grooves 21. The connecting disc 16 and the charging housing 2 are detachably assembled and disassembled by screws threaded into the connecting holes. The screw heads are located within the connecting grooves 21 and do not protrude outwards.

[0044] like Figure 3 , Figure 4 and Figure 5 As shown, the tool holder positioning seat 1 has a positioning hole 3 on its base for positioning and placing the tool holder. Two pin-moving holes 25 are respectively provided on both radial sides of the positioning hole 3 within the base. Figure 2 and Figure 7 As shown, a positioning pin 4 is movably fitted into each pin movable hole 25. Two positioning pins 4 are arranged opposite each other, with one opposite end of each positioning pin 4 extending out of the seat body. This end is connected to a handle 7, forming an L-shaped plunger structure with the positioning pin 4. A return spring 26 is fitted onto the positioning pin 4, with one end connected to the positioning pin 4 and the other end connected to the seat body. The insertion end face of the positioning pin 4 is beveled. Under normal conditions, the positioning pin 4, under the elastic force of the return spring 26, extends into the positioning hole 3. When the tool handle 5 is gradually inserted into the positioning hole 3, the tool handle 5 presses down on the aforementioned bevel, causing the two positioning pins 4 to move outwards from the positioning hole 3 until the tool handle 5 is properly positioned. At this point, under the action of the return spring 26, the two positioning pins 4 automatically insert into the insertion holes on the tool handle 5 to position the tool handle 5. Two limiting blocks 6 are also provided in the positioning hole 3. When the tool holder 5 is put into the positioning hole 3, the two limiting blocks 6 are respectively inserted into the two positioning notches on the tool holder 5 to restrict the rotation of the tool holder 5.

[0045] like Figure 7 and Figure 8As shown, the charging housing 2 is supported by aviation aluminum and houses a drive motor 8 and a battery 17 electrically connected to the drive motor 8. The charging housing 2 also has a charging port 18 electrically connected to the battery 17. The charging port 18 uses a Type-C interface and has a protective cover 23. When not charging, the protective cover 23 covers the charging port 18 to prevent external dust from entering. When a matching charging cable is inserted into the charging port 18, the battery 17 can be charged. The drive motor 8 is connected to a planetary reduction gearbox. The planetary reduction gearbox has no anti-reverse structure. The output shaft of the drive motor 8 extends into the tool holder positioning seat 1, and a transmission shaft 10 is connected to the output shaft. The transmission shaft 10 is coaxial with the positioning hole 3.

[0046] 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 it via a sliding clearance fit. The central shaft 9 can rotate relative to the base body 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.

[0047] 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.

[0048] The top of the central shaft 9 is equipped with a bit interface 20 that mates with the bit 24. The bit interface 20 is a hexagonal hole, and the output end of the bit 24 is a standard internal hex socket, which can be inserted into the bit interface 20. The central shaft 9 has an embedded magnet for attracting the bit 24. When the bit 24 is inserted, it can be stably attracted inside the central shaft 9 under the action of the magnet. Under a large pulling force, the bit 24 can be pulled out from the bit interface 20, thus allowing for the replacement of different sizes of bit 24. The output ends of different sizes of bit 24 are all standard internal hex sockets, only the input end specifications differ, ensuring that they can all be assembled with the central shaft 9. They can also accommodate different sizes of locking screws, improving the versatility of the electric tool changer.

[0049] Below the two positioning pins 4 on the base body are a momentary switch 15 and a three-position adjustment switch 22, which are electrically connected to the battery 17 and the motor, respectively. The momentary switch 15 is used to control the opening and closing of the drive motor 8. The three-position adjustment switch 22 has three positions: 1 (forward rotation), 2 (reverse rotation), and 0 (reset). When the three-position adjustment switch 22 is set to position 1, the drive motor 8 rotates forward for installing the tool; when the three-position adjustment switch 22 is set to position 2, the drive motor 8 rotates in reverse for removing the tool. The drive motor 8 has a built-in torque control module, so the torque does not need to be adjusted. It is adaptive to torque, tightening in one step, and automatically stops after the locking screw is tightened.

[0050] In this embodiment, the installation and removal of the CVJ ball end mill are taken as an example. In actual use, such as Figure 6 , Figure 7 and Figure 8 As shown, the tool holder 5 is inserted into the positioning hole 3. During insertion, the tool holder 5 presses against the inclined surface of the positioning pin 4, causing the two positioning pins 4 to disengage from the positioning hole 3. The tool holder 5 is rotated until the two positioning notches on the tool holder 5 engage with the two limiting blocks 6 in the positioning hole 3. At the same time, the two insertion holes on the tool holder 5 are aligned with the two positioning pins 4. At this time, under the action of the return spring 26, the two positioning pins 4 extend into the two insertion holes of the tool holder 5, thus positioning the tool holder 5. During the process of inserting the tool holder 5 into the positioning hole 3, the input end of the bit contacts and engages with the locking screw in the tool holder 5 under the action of the compression spring 12. When a CVJ ball end mill is in the tool holder 5, power is turned on via the jog switch 15, and the three-position adjustment switch 22 is set to position 1. The drive motor 8 rotates forward, driving the bit 24 to rotate via the central shaft 9. The rotation of the bit 24 causes the locking screw to disengage from the CVJ ball end mill, thus disassembling the CVJ ball end mill. When a CVJ ball end mill is not in the tool holder 5, it can be inserted. The three-position adjustment switch 22 is set to position 2, driving the motor 8 in reverse. The bit 24 is then used to screw the locking screw from the tool holder 5 into the CVJ ball end mill, thus installing the CVJ ball end mill. After installation, the two locating pins 4 are manually pulled out of the tool holder 5 by pulling the two handles 7, unlocking the tool holder 5 and allowing it to be pulled out from the locating hole 3.

[0051] It should be noted that the electric tool changer of this utility model is not limited to the quick installation and removal of the CVJ ball end mills mentioned above. As long as the tool is installed by means of a rear end screw, such as a boring bar or reamer with a shank, it can achieve automatic and quick installation and removal, and the installation and removal efficiency is higher.

[0052] Embodiment 2 of the electric tool changer provided by this utility model:

[0053] Its main difference from Example 1 is:

[0054] 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.

[0055] In this embodiment, no battery is installed inside the housing; instead, a power cable electrically connected to the drive motor is directly installed.

[0056] Example 3 of the electric tool changer provided by this utility model:

[0057] Its main difference from Example 1 is:

[0058] In Example 1, the bit is detachably connected to the central shaft.

[0059] In this embodiment, the bit is fixedly connected to the central shaft, and the bit is only suitable for locking screws of the same specification.

[0060] In the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

[0061] 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, It includes a tool holder positioning seat and a charging housing. The tool holder positioning seat is provided with a positioning hole for positioning and placing the tool holder. Positioning pins for inserting into corresponding holes on the tool holder are movably mounted on both radial sides of the positioning hole on the tool holder positioning seat. A central shaft capable of moving up and down relative to the tool holder positioning seat is rotatably mounted in the tool holder positioning seat at the position corresponding to the positioning hole. A drive motor for driving the central shaft to rotate is provided in the charging 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 charging case contains a battery that is electrically connected to the drive motor, and the charging case has a charging port that is electrically connected to the battery; or, the charging case has a power cord that is electrically connected to the drive motor.

2. The electric tool changer according to claim 1, characterized in that, A drive shaft is connected to the output shaft of the drive motor. The upper end of the drive shaft extends into the tool holder positioning seat. The central shaft is anti-rotatingly fitted with the drive shaft and is slidably assembled in the vertical direction. The central shaft is rotatably assembled with the tool holder positioning seat via a bearing, and the central shaft and the bearing are in a sliding clearance fit 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.

3. The electric tool changer according to claim 1, characterized in that, The bit is detachably connected to the central shaft.

4. An electric tool changer according to claim 3, 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.

5. An electric tool changer according to claim 1, characterized in that, The positioning hole is also provided with a limiting block for insertion into the positioning notch on the tool holder.

6. An electric tool changer according to any one of claims 1-5, characterized in that, One end of the positioning pin extends out of the tool holder positioning seat and is connected to a handle; a return spring is sleeved on the positioning pin, with one end of the return spring connected to the positioning pin and the other end connected to the tool holder positioning seat.

7. An electric tool changer according to claim 6, characterized in that, The end face of the positioning pin furthest from the handle is beveled.

8. An electric tool changer according to any one of claims 1-5, characterized in that, The tool holder positioning seat is detachably connected to the charging shell.

9. An electric tool changer according to claim 8, characterized in that, The tool holder positioning seat includes a base and a connecting disc disposed at the bottom of the base. The connecting disc has multiple connecting grooves on its circumference. The top of the charging shell has connecting holes that correspond one-to-one with the connecting grooves.

10. An electric tool changer according to claim 9, characterized in that, The base is provided with a jog switch and a three-position adjustment switch on both sides. The jog switch is used to control the start and stop of the drive motor, and the three-position adjustment switch is used to control the forward and reverse rotation of the drive motor.

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