Multifunctional electric tool with replaceable working head and replaceable tool apron

Abstract

The multifunctional electric tool comprises a handle, a driving control mechanism, a storage battery, an installation base, an end cover, the tool apron and the working head, the installation base comprises a base table and a connecting table, a first installation cavity is formed in the installation base, the base table is installed in the front end of the handle, the connecting table is inserted into the rear end of the end cover, and the end cover is arranged on the base table. First external threads are formed on the outer wall of the working head, internal threads matched with the first external threads are formed on the inner wall of the end cover, a second mounting cavity is formed in the tool apron, a sleeve is formed at the rear end of the tool apron and inserted into the front end of the end cover, and second external threads matched with the internal threads are formed on the outer wall of the sleeve. The butt joint table is inserted into the second mounting cavity and fixed through a first bolt, and the output end of the driving control mechanism is connected with the working head. According to the technical scheme, free replacement of different working heads and tool aprons is supported, complex machining tasks can be independently completed, and the working efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and more specifically to a multi-functional power tool with replaceable working head and tool holder. Background Technology

[0002] Power tools are tools powered by electricity. They can quickly and efficiently complete various processing tasks such as cutting, grinding, polishing, drilling, and assembly. Therefore, they play an important role in many fields such as industrial production, construction, agriculture, and daily life.

[0003] Traditional power tools do not support self-replacement of their working heads and have limited processing functions. As shown in the power tool with publication number CN221774414U and patent name "A Handheld Power Tool", it includes a housing and a rear cover. The rear cover is fixedly installed on the rear end face of the housing. A motor is installed inside the housing. A gearbox rear cover is installed in front of the motor. A gearbox front shell is installed in front of the gearbox rear cover. The gearbox front shell is fixedly connected to the housing. The drive shaft of the motor passes through the motor and is located between the rear cover and the gearbox rear cover, and is connected to the internal gear transmission assembly. A heat dissipation fin is provided on the rear end face of the gearbox rear cover. A heat-conducting pad is installed between the gearbox front shell and the gearbox rear cover. The gearbox front shell, the heat-conducting pad, and the gearbox rear cover are fixedly connected by bolts.

[0004] The aforementioned power tools primarily feature improved heat dissipation structures, preventing heat generated during operation from accumulating inside the gearbox and thus protecting its lifespan from prolonged high-temperature operation. However, like other traditional power tools, they lack additional processing capabilities, making it impossible to independently complete complex processing tasks. They often require coordination with other power tools. For example, when drilling and grinding are both needed, separate electric drills and sanders are required, undoubtedly increasing the user's financial burden. Owning multiple power tools also means requiring more storage space, increasing maintenance and upkeep workload and costs. Furthermore, frequent tool changes during complex processing tasks waste time, reduce work efficiency, and hinder continuous operation. Utility Model Content

[0005] In response to the above issues, and to overcome the problems of existing power tools having non-replaceable working heads, limited processing functions, and inability to independently complete complex processing tasks, often requiring cooperation with other power tools, leading to increased purchase and maintenance costs, low work efficiency when performing complex processing tasks, and difficulty in achieving continuous operation, the purpose of this utility model is to provide a power tool that supports free replacement between different types and specifications of working heads and tool holders, thereby enabling independent completion of complex processing tasks, significantly improving work efficiency, achieving continuous operation, and eliminating the need for additional tools, thus optimizing purchase and maintenance costs.

[0006] To achieve the above objectives, the technical solution of this utility model is:

[0007] A multi-functional power tool with replaceable working head and tool holder includes a handle, a drive control mechanism, a battery, a mounting base, an end cap, a tool holder, and a working head. The mounting base includes a base and a connecting platform, and has a first mounting cavity inside. The base is installed in the front end of the handle, and the connecting platform is inserted into the rear end of the end cap. A first external thread is formed on the outer wall of the connecting platform, and an internal thread that mates with the first external thread is formed on the inner wall of the end cap. A second mounting cavity is formed in the tool holder, and a sleeve is formed at its rear end. The sleeve is inserted into the front end of the end cap, and a second external thread that mates with the internal thread is formed on its outer wall. A mating platform is formed at the rear end of the working head, and the mating platform is inserted into the second mounting cavity and fixed by a first bolt. A drive shaft is provided in the first mounting cavity, and the output end of the drive control mechanism is connected to the working head through the drive shaft.

[0008] Preferably, the tool holder has a first screw hole that communicates with the second mounting cavity, and the outer wall of the docking platform has a slot that is opposite to the first screw hole. The first bolt engages with the first screw hole and abuts against the slot.

[0009] Preferably, the vertical projection surface of the mating position of the second mounting cavity docking platform is non-circular.

[0010] Preferably, it also includes a protective cover located between the end cap and the working head, which is fitted over the outside of the tool holder.

[0011] Preferably, it also includes a waterproof gasket, a first support ring platform is formed on the inner wall of the protective cover, a second support ring platform is formed on the working head, and the waterproof gasket is disposed between the first support ring platform and the second support ring platform with an interference fit.

[0012] Preferably, the handle includes an upper housing, a lower housing, and a battery cover. An inner cavity is formed between the upper housing and the lower housing. The base of the mounting seat, the drive control mechanism, and the battery are located in the inner cavity. A second screw hole is provided on the upper housing, a third screw hole is provided on the lower housing, and a fourth screw hole is provided on the base. The fourth screw hole corresponds to the second and third screw holes and is fixed by a second bolt. The battery cover is fastened to the rear end of the upper housing and the lower housing.

[0013] Preferably, the handle also includes a tool holder that is hinged to a mating position on the upper and lower housings.

[0014] Preferably, the drive control mechanism includes a motor, a control circuit board, a power indicator light, a drive switch, and a protection switch. The motor, battery, power indicator light, drive switch, and protection switch are all electrically connected to the control circuit board. The output end of the motor passes through the first mounting cavity, the second mounting cavity, and the docking platform in sequence and is connected to the working head. The protection switch is connected to the tool clamp.

[0015] Preferably, it also includes an anti-slip sleeve, which is fitted onto the outer wall of the handle.

[0016] Preferably, it also includes an anti-slip sleeve, which is fitted onto the outer wall of the handle.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model of power tool allows users to replace the tool holder and working head according to the actual processing needs. Replacing the working head simply requires removing the first bolt securing the working head and tool holder, and then pulling the working head off. The tool holder can be replaced by rotating it off the end cover. This allows the power tool to independently complete complex processing tasks without needing to work with other power tools. Users only need to configure several different tool holders and working heads, significantly reducing maintenance workload and costs. Furthermore, frequent tool changes are unnecessary when performing complex processing tasks, improving work efficiency and enabling continuous operation. The threaded connection between the working head and tool holder, and between the end cover and tool holder, allows users to easily disassemble and assemble by simply rotating the tool, simplifying the replacement process and making it more convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the power tool of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the power tool of this utility model, including the mounting base, end cover, drive shaft, tool holder, protective cover, waterproof gasket, first bolt, and working head when separated from the handle;

[0021] Figure 3 This is a schematic diagram of the structure of the power tool of this utility model when the mounting base, end cover, drive shaft, tool holder, protective cover, waterproof gasket, first bolt and working head are separated from each other;

[0022] Figure 4 This is a utility model Figure 1 A schematic diagram of the cross-sectional structure of section AA;

[0023] Figure 5 This is a utility model Figure 4 A magnified structural diagram of part A;

[0024] Figure 6 This is a schematic diagram of the left housing, right housing, battery cover, and tool clip of the power tool handle of this utility model when separated.

[0025] As shown in the figure:

[0026] 1. Handle; 101. Upper housing; 101a. Second screw hole; 102. Lower housing; 102a. Third screw hole; 103. Battery cover; 104. Tool holder; 2. Drive control mechanism; 201. Motor; 202. Control circuit board; 203. Power indicator light; 204. Drive switch; 205. Protection switch; 3. Battery; 4. Mounting base; 401. Base; 401a. Fourth screw hole; 402. Connecting platform; 402a. First screw hole 403. External thread; 5. First mounting cavity; 6. End cap; 701. Internal thread; 8. Tool holder; 9. Sleeve; 10. Second external thread; 11. First threaded hole; 12. Working head; 13. Working platform; 14. Butt joint; 15. Slot; 16. Second support ring platform; 17. First bolt; 18. Protective cover; 19. First support ring platform; 10. Waterproof washer; 11. Second bolt; 12. Anti-slip sleeve; 13. Drive shaft. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the purpose of simplifying the description and do not indicate or imply that the orientation is a specific orientation or specific orientation structure and operation. Therefore, they should not be construed as limiting this utility model.

[0029] like Figures 1 to 5As shown, this utility model relates to a multi-functional power tool with a replaceable working head 7 and tool holder 6. It includes a handle 1, a drive control mechanism 2, a battery 3, a mounting base 4, an end cap 5, a tool holder 6, and a working head 7. The handle 1 is hollow inside and has an opening at the front end. The drive control mechanism 2, battery 3, and clamping mechanism are all located inside the handle 1, thus protecting it. The mounting base 4 includes a base 401 and a connecting platform 402, which are side-by-side. The base 401 is located at the front end of the mounting base 4, while the connecting platform 402 is closer to the rear end. A first mounting cavity 403 is formed inside the mounting base 4, which is a through cavity that penetrates the mounting base 4. At both ends, the base 401 is inserted into the handle 1 through the opening at the front end of the handle 1 and connected to the handle 1. The end cover 5 is an overall annular structure. The connecting platform 402 is inserted into the end cover 5 through the rear end of the end cover 5 and connected to the end cover 5. A first external thread 402a is formed on the outer wall of the connecting platform 402, and an internal thread 501 is formed on the inner wall of the end cover 5. The first external thread 402a and the internal thread 501 are matched and threaded together to form a detachable connection. The tool holder 6 has a second mounting cavity 601 inside. The second mounting cavity 601 is a through cavity that is the same as the first mounting cavity 403. It passes through the front and rear ends of the tool holder 6. A sleeve 602 is formed at the rear end of the tool holder 6. The sleeve 602 is inserted into the end cover 5 through the front end of the end cover 5. The end cover 5 makes the connecting platform 402a of the mounting base 402 connected to the handle 1. 2. The sleeve 602 is connected to the working head 7. A second external thread 602a is formed on the outer wall of the sleeve 602. The second external thread 602a matches the internal thread 501 and is threadedly engaged with the internal thread 501 to form a detachable connection. The front end of the working head 7 is the output end for processing operations. The rear end of the working head 7 has a docking platform 701. The docking platform 701 is inserted into the second mounting cavity 601 and fixed to the working head 7 by the first bolt 8. The threaded connection also allows the working head 7 to be disassembled from the second mounting cavity 601. A drive shaft 13 is provided in the first mounting cavity 403. The output end of the drive control mechanism 2 is connected to the working head 7 through the drive shaft 13. When the drive control mechanism 2 is running, it can directly drive the working head. 7. During operation, this utility model power tool allows users to replace the tool holder 6 and working head 7 according to the actual processing needs. Replacing the working head 7 simply requires removing the first bolt 8 that secures the working head 7 and tool holder 6, and then removing the working head 7 by plugging and unplugging. The tool holder 6 can be replaced by rotating it out of the end cover 5. This allows this utility model power tool to independently complete complex processing tasks without needing to cooperate with other power tools. Users only need to configure several different tool holders 6 and working heads 7, significantly reducing maintenance workload and costs. Furthermore, it eliminates the need for frequent tool changes when performing complex processing tasks, thereby improving work efficiency and enabling continuous operation.The threaded connections between the working head 7 and the tool holder 6, as well as between the end cover 5 and the tool holder 6, allow users to easily assemble and disassemble the tool by simply rotating it, simplifying the replacement process and making it more convenient to use.

[0030] like Figure 2 and Figure 3 As shown, the tool holder 6 has a first screw hole 603, which communicates with the second mounting cavity 601. The outer wall of the mating platform 701 has a groove 701a, which is opposite to the first screw hole 603. The first bolt 8 is inserted into the first screw hole 603 and passes through the first screw hole 603 into the groove 701a, thus abutting against the inner wall of the groove 701a. When the first bolt 8 is tightened, the self-locking property of the threaded connection will generate a large pressure, so that the working head 7 can maintain a tight connection with the tool holder 6. At the same time, the groove walls on both sides of the groove 701a will provide a limiting effect on the first bolt 8, preventing the first bolt 8 from swinging and loosening.

[0031] Furthermore, the vertical projection surface of the mating position of the second mounting cavity 601 mating table 701 is non-circular, which can prevent relative rotation between the mating table 701 of the working head 7 and the tool holder 6, thereby maintaining a stable connection when the working head 7 performs machining operations through its output end.

[0032] like Figures 1 to 5 As shown, it also includes a protective cover 9, which is also an annular cover. The protective cover 9 is located between the end cover 5 and the working head 7 and is fitted over the outside of the tool holder 6. The protective cover 9 encloses the first bolt 8 that connects and fixes the tool holder 6 and the working head 7 inside, thereby preventing the first bolt 8 from being exposed to the external space and further preventing the first bolt 8 from loosening, so that the tool holder 6 and the working head 7 maintain a stable connection.

[0033] like Figures 2 to 5 As shown, it also includes a waterproof washer 10. A first support ring platform 901 is formed on the inner wall of the protective cover 9, and a second support ring platform 702 is formed on the working head 7. The second support ring platform 702 is directly opposite to the first support ring platform 901. The waterproof washer 10 is disposed between the first support ring platform 901 and the second support ring platform 702 and is interference-fitted with the first support ring platform 901 and the second support ring platform 702. The waterproof washer 10 can prevent external dust, moisture or other impurities from entering the working head 7, the tool holder 6, the mounting base 4 and the handle 1, reducing the possibility of poor contact problems and thus improving the service life of the entire power tool.

[0034] like Figure 6As shown, the handle 1 includes an upper housing 101, a lower housing 102, and a battery cover 103. An inner cavity is formed between the upper housing 101 and the lower housing 102. The base 401 of the mounting base 4, the drive control mechanism 2, and the battery 3 are all located within this inner cavity. A second screw hole 101a is provided on the upper housing 101, a third screw hole 102a is provided on the lower housing 102, and a fourth screw hole 401a is provided on the base 401. The fourth screw hole 401a corresponds to the second and third screw holes 102a and is fixed by a second bolt 11. Mounting base 4 is fixed to handle 1 and is detachably fixed, allowing mounting base 4 to be removed from handle 1 for replacement. When mounting base 4 is damaged, it is convenient for users to replace it, avoiding the scrapping of the entire power tool and saving users' operating costs. Battery cover 103 is fastened to the rear end of upper housing 101 and lower housing 102, thereby sealing the battery 3 inside and preventing it from falling off. The fastening is a detachable connection, allowing battery cover 103 to switch between fixed and open states. When opened, the battery 33 can be taken out of the inner cavity for charging.

[0035] like Figure 1 and Figure 6 As shown, the handle 1 also includes a tool clip 104, which is hinged to the mating position of the upper housing 101 and the lower housing 102. Similar to a pen clip, the tool clip 104 can be clipped to a pocket or other part of clothing, making it convenient for the user to carry.

[0036] like Figure 6 As shown, the drive control mechanism 2 includes a motor 201, a control circuit board 202, a power indicator light 203, a drive switch 204, and a protection switch 205. The motor 201, battery 3, power indicator light 203, drive switch 204, and protection switch 205 are all electrically connected to the control circuit board 202. The output end of the motor 201 passes sequentially through the first mounting cavity 403, the second mounting cavity 601, and the docking platform 701, and is connected to the working head 7. The protection switch 205 is connected to the tool holder 104 and can prevent damage to the drive switch 204. When the tool holder 104 is pressed, the protective switch 205 can be pressed accordingly. The control circuit board 202 has a chip for executing the control commands sent by the user. When the protective switch 205 is pressed and the drive switch 204 is pressed, the chip on the control circuit board 202 receives the control command and controls the motor 201 to run. The motor 201 drives the working head 7 to run for processing. It should be mentioned that the drive switch 204 is a toggle switch with multiple positions, which can adjust the speed of the motor 201 to meet more processing scenarios.

[0037] like Figure 1 and Figure 2As shown, it also includes an anti-slip sleeve 12, which is fitted onto the outer wall of the handle 1. The anti-slip sleeve 12 is made of rubber or silicone. When the user holds the handle 1, it can prevent slippage, thereby giving better control over the entire power tool.

[0038] Combination Figures 1 to 6 When using the power tool of this utility model, the user needs to press the protection switch 205 first, and then control the operation by pressing the drive switch 204. When the drive switch 204 is pressed, the chip on the control circuit board 202 receives the control command and controls the motor 201 to run. The motor 201 drives the working head 7 to run for processing. When it is necessary to replace the tool holder 6, the user can rotate the tool holder 6 to disengage it from the connecting platform 402 of the mounting base 4. The tool holder 6 can be replaced by disengaging it from the mounting base 4. To replace the working head 7, simply remove the protective cover 9, remove the first bolt 8 that fixes the working head 7 and the tool holder 6, and finally remove the working head 7 by plugging and unplugging.

[0039] The embodiments and descriptions above are merely illustrative of the principles and preferred embodiments of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A multi-purpose electric power tool in which a working head and a tool holder are replaceable, characterized in that, It includes handle (1), drive control mechanism (2), battery (3), mounting seat (4), end cover (5), tool holder (6) and working head (7), the mounting seat (4) includes base (401) and connecting table (402), and the inside is provided with first installation cavity (403), the base (401) is installed in the front end of handle (1), the connecting table (402) is inserted into the rear end of end cover (5), the outer wall is formed with first external thread (402a), the inner wall of end cover (5) is formed with internal thread (501) matched with first external thread (402a), the second installation cavity (601) is opened in the tool holder (6), and the rear end is formed with sleeve (602), the sleeve (602) is inserted into the front end of end cover (5), the outer wall is formed with second external thread (602a) matched with internal thread (501), the rear end of working head (7) is formed with docking table (701), the docking table (701) is inserted into the second installation cavity (601), and is fixed through first bolt (8), the first installation cavity (403) is provided with transmission shaft (13), and the output end of drive control mechanism (2) is connected with working head (7) through transmission shaft (13).

2. The multi-functional power tool of claim 1, wherein The first screw hole (603) is communicated with the second installation cavity (601), the outer wall of the docking table (701) is provided with a clamping groove (701a), the clamping groove (701a) is opposite to the first screw hole (603), and the first bolt (8) is matched with the first screw hole (603) and abuts in the clamping groove (701a).

3. The multi-functional power tool of claim 2, wherein The shape of the vertical projection surface of the matching position of the docking table (701) of the second installation cavity (601) is non-circular.

4. The multi-functional power tool of claims 1 to 3, wherein It also includes protective cover (9), which is located between end cover (5) and working head (7), and is sleeved on the outside of tool holder (6).

5. The multi-functional power tool of claim 4, wherein It also includes waterproof gasket (10), the inner wall of protective cover (9) is formed with first support ring table (901), the working head (7) is formed with second support ring table (702), and the waterproof gasket (10) is arranged between the first support ring table (901) and the second support ring table (702) and is matched with interference.

6. The multi-functional power tool of claim 1, 2, 3 or 5, wherein, The handle (1) includes upper shell (101), lower shell (102) and battery cover (103), the inner cavity is formed between the upper shell (101) and the lower shell (102), the base (401) of the mounting seat (4), the drive control mechanism (2) and the battery (3) are arranged in the inner cavity, the second screw hole (101a) is opened in the upper shell (101), the third screw hole (102a) is opened in the lower shell (102), the fourth screw hole (401a) is opened in the base (401), the fourth screw hole (401a) corresponds to the second screw hole (101a) and the third screw hole (102a), and is fixed through the second bolt (11), and the battery cover (103) is buckled on the rear end of the upper shell (101) and the lower shell (102).

7. The multi-functional power tool of claim 6, wherein The handle (1) further comprises a tool holder (104) hinged to the fitting position of the upper shell (101) and the lower shell (102).

8. The multi-functional power tool of claim 7, wherein The driving control mechanism (2) is provided with a motor (201), a control circuit board (202), an electric quantity indicator lamp (203), a driving switch (204) and a protection switch (205), the motor (201), the storage battery (3), the electric quantity indicator lamp (203), the driving switch (204) and the protection switch (205) are electrically connected with the control circuit board (202), the output end of the motor (201) sequentially passes through a first mounting cavity (403), a second mounting cavity (601) and a docking table (701) and is connected with the working head (7), and the protection switch (205) is connected with the tool holder (104).

9. A multi-functional power tool with replaceable tool head and tool holder according to any one of claims 1, 2, 3, 5, 7 or 8, characterized in that, It further comprises an anti-skid sleeve (12) sleeved on the outer sidewall of the handle (1).

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