Electric tool with working head convenient to replace

Abstract

The utility model provides an electric tool with a working head convenient to replace, which comprises a shell, a handle is integrally arranged at the rear end of the shell, an annular connecting seat is integrally arranged at the side part of the front end of the shell, a quick clamping mechanism and a quick release working head are arranged on the annular connecting seat, and the quick release working head is clamped with the annular connecting seat through the quick clamping mechanism. A connecting shaft is rotationally mounted in the quick release working head through a bearing I; and the electric driving mechanism is installed in the shell, and the electric driving mechanism is in transmission connection with one end of the connecting shaft. The electric tool with the working head convenient to replace is mainly composed of the shell, the quick-release working head and the electric driving mechanism, the quick-release working head is connected with the annular connecting base in a clamped mode through the quick clamping mechanism, so that the quick-release working head can be integrally and quickly replaced, and tool-free quick switching of working heads with different functions such as concentric working heads and eccentric working heads is supported; operation is simple, convenient and fast, and work is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to an electric tool with a working head that is convenient to replace. Background Art

[0002] Power tools are mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common power tools include electric drills, electric polishers, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers.

[0003] Among them, the working heads of most electric polishing machines are not easy to disassemble and assemble, which makes replacement troublesome, thus affecting work efficiency.

[0004] For example, the multi-contact surface hand-held polisher provided by publication number CN215148009U, the utility model includes a mounting shell and a fixed plate, a bracket is fixedly connected to the middle of both sides of the inner wall of the mounting shell, a motor is fixedly connected to the middle of the bracket, and the power output end of the motor passes through the mounting shell and is fixedly connected to the fixed plate; the utility model implements position limitation by means of a protrusion and a fixed sleeve between the fixed plate and the positioning block, so that the electromagnets around the periphery of the positioning block can effectively adsorb and position the iron blocks around it, thereby allowing the user to effectively improve the adhesion and polishing degree of each surface when performing polishing on the uneven processing surface, and cooperate with the reset effect of the spring to realize multi-sided polishing processing of the processing surface to be processed, effectively reducing the polishing error of each surface, thereby improving the processing effect of the corner curvature, improving the polishing efficiency, and effectively making up for the deficiencies in the prior art.

[0005] According to the handheld polishing machine introduced above, when replacing the polishing head, it is necessary to press the spindle locking function button to prevent the rotating seat from rotating, and then take the tool to rotate the fastening bolt to cancel the fixation of the polishing head, which makes the disassembly and assembly of the polishing head cumbersome and brings inconvenience to the staff. Utility Model Content

[0006] The utility model aims to solve the problem raised in the background technology and provides an electric tool which is convenient for replacing a working head.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An electric tool for facilitating replacement of a working head, comprising:

[0009] The rear end of the shell is integrally provided with a handle, and the front end side of the shell is integrally provided with an annular connecting seat, and the annular connecting seat is provided with a quick clamping mechanism,

[0010] A quick-release working head, the quick-release working head is clamped with the annular connecting seat through the quick clamping mechanism, and a connecting shaft is rotatably mounted inside the quick-release working head through a bearing;

[0011] The electric drive mechanism is installed inside the shell and is drivingly connected to one end of the connecting shaft.

[0012] As a preferred solution of the utility model, the quick clamping mechanism includes two locking buttons movably mounted on the annular connecting seat and a plurality of clamping blocks 1 integrally arranged on the inner ring surface of the annular connecting seat, wherein:

[0013] The two locking buttons are symmetrically arranged, a limiting column 1 is fixedly installed on the inner side of each locking button, and a locking tongue is fixedly installed on a side wall of each locking button facing the quick-release working head, a spring is sleeved on the limiting column 1, and a limiting column 2 is inserted into the end of the spring away from the locking button, and a fixing plate is fixedly installed on the end of the limiting column 2 away from the locking button, and the fixing plate is fixedly installed inside the annular connecting seat;

[0014] A plurality of the first clamping blocks are distributed at equal angles in an annular direction on the inner annular surface of the annular connecting seat, and there is a gap between two adjacent first clamping blocks;

[0015] The quick-release working head is in a cylindrical structure as a whole, and a plurality of clamping blocks 2 are integrally provided on the edge of one end of the quick-release working head, and two lock holes matching the lock tongue are reserved on one end surface of the quick-release working head, and the plurality of clamping blocks 2 are arranged at equal angles in a circular direction;

[0016] Insert the second clamping block through the gap into the interior of the annular connecting seat and then rotate the quick-release working head to clamp the second clamping block inside the first clamping block, while allowing the locking tongue to be inserted into the locking hole;

[0017] Pressing the locking button and rotating the quick-release working head in the opposite direction can separate the second clamping block from the first clamping block, and at the same time enable the locking tongue to be pulled out of the locking hole.

[0018] As a preferred solution of the utility model, the electric drive mechanism includes a motor, a driving bevel gear, a mounting plate, a driven shaft and a driven bevel gear, the motor is fixedly mounted inside the housing, the driving bevel gear is arranged inside the housing and fixedly mounted on the end of the output shaft of the motor, the mounting plate is fixedly mounted inside the housing, the driven shaft is rotatably mounted on the mounting plate through bearing 2, and a regular hexagonal socket is provided at one end of the driven shaft facing the quick-release working head, the driven bevel gear is fixedly mounted on the other end of the driven shaft, and the driven bevel gear is meshed with the driving bevel gear, and a regular hexagonal plug block is fixedly mounted on one end of the connecting shaft, and the regular hexagonal plug block is inserted into the interior of the regular hexagonal socket.

[0019] As a preferred solution of the utility model, a connecting rod is centrally fixedly installed on the end face of the driven bevel gear away from the driven shaft, and a bearing three is fixedly installed on the end of the connecting rod away from the driven bevel gear, and the outer ring of the bearing three is fixedly connected to the inner wall of the outer shell.

[0020] As a preferred solution of the utility model, a fan blade is fixedly mounted on the output shaft of the motor, the fan blade is located inside the housing, and a heat dissipation channel communicating with the fan blade is provided on the housing.

[0021] As a preferred solution of the utility model, a battery compartment for installing a power supply battery is integrally provided at the rear end of the handle, and the battery compartment is electrically connected to the motor.

[0022] As a preferred solution of the present invention, a control switch is installed on the housing near the handle, and the control switch is connected in series between the battery compartment and the motor.

[0023] As a preferred solution of the utility model, a display panel is also installed on the housing, and the display panel has a display screen and an indicator light.

[0024] The utility model has the following beneficial effects:

[0025] The electric tool with easy-to-replace working head provided by the utility model is mainly composed of a shell, a quick-release working head and an electric drive mechanism. The quick-release working head is clamped with the annular connecting seat through a quick clamping mechanism, so that the quick-release working head can be quickly replaced as a whole, and supports tool-free quick switching of working heads with different functions such as concentric and eccentric working heads. The operation is simple, convenient and fast, and the work is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model (1);

[0027] Figure 2It is a structural schematic diagram of the utility model (2);

[0028] Figure 3 It is a structural schematic diagram of the utility model (3);

[0029] Figure 4 It is a schematic diagram of a partially exploded structure of the utility model;

[0030] Figure 5 It is a schematic diagram of the partial internal structure of the utility model;

[0031] Figure 6 It is a partial structural schematic diagram of the utility model (1);

[0032] Figure 7 It is a partial structural schematic diagram of the utility model (2);

[0033] Figure 8 It is a partial structural schematic diagram (3) of the utility model.

[0034] In the attached figure:

[0035] 1. Shell; 2. Ring connector; 3. Handle; 4. Battery compartment; 5. Control switch; 6. Lock button; 7. Quick-release work head; 8. Grinding disc; 9. Display panel; 10. Lock tongue; 11. Block 2; 12. Lock hole; 13. Block 1; 14. Mounting plate; 15. Driven shaft; 16. Regular hexagonal socket; 17. Motor; 18. Fan blade; 19. Active bevel gear; 20. Driven bevel gear; 21. Limit column 1; 22. Spring; 23. Limit column 2; 24. Fixed plate; 25. Connecting rod; 26. Bearing 3; 27. Bearing 1; 28. Connecting shaft; 29. ​​Regular hexagonal plug; 30. Heat dissipation channel. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Example

[0038] like Figure 1-Figure 8 As shown, an electric tool for easily replacing a working head comprises a housing 1, a quick-release working head 7 and an electric drive mechanism.

[0039] The rear end of the housing 1 is integrally provided with a handle 3 for holding the electric tool, and the front end side of the housing 1 is integrally provided with an annular connecting seat 2, on which a quick clamping mechanism is provided;

[0040] The quick-release working head 7 is connected to the annular connecting seat 2 through a quick clamping mechanism, and a connecting shaft 28 is rotatably mounted inside the quick-release working head 7 through a bearing 27;

[0041] The electric drive mechanism is installed inside the housing 1 , and is transmission-connected to one end of the connecting shaft 28 .

[0042] The electric tool that is easy to replace the working head and adopts the above-mentioned technical solution is mainly composed of a shell 1, a quick-release working head 7 and an electric drive mechanism. The quick-release working head 7 is clamped with the annular connecting seat 2 through a quick clamping mechanism, so that the quick-release working head 7 can be quickly replaced as a whole, and supports tool-free quick switching of working heads with different functions such as concentric and eccentric functions. The operation is simple, convenient and fast, and the work is more efficient.

[0043] Specifically, in the present embodiment, the quick clamping mechanism includes two locking buttons 6 movably mounted on the annular connecting seat 2 and a plurality of clamping blocks 13 integrally arranged on the inner ring surface of the annular connecting seat 2 .

[0044] Among them, the two locking buttons 6 are symmetrically arranged, and a limiting column 21 is fixedly installed on the inner side of each locking button 6, and a lock tongue 10 is fixedly installed on the side wall of each locking button 6 facing the quick-release working head 7, and a spring 22 is sleeved on the limiting column 21, and a limiting column 23 is inserted at one end of the spring 22 away from the locking button 6, and a fixing plate 24 is fixedly installed at one end of the limiting column 23 away from the locking button 6, and the fixing plate 24 is fixedly installed inside the annular connecting seat 2;

[0045] Among them, a plurality of card blocks 13 are arranged on the inner surface of the annular connecting seat 2 at equal angles in the annular direction, and there is a gap between two adjacent card blocks 13;

[0046] The quick-release working head 7 is cylindrical in structure as a whole, and a plurality of clamping blocks 11 are integrally provided on one end edge of the quick-release working head 7, and two lock holes 12 matching the lock tongue 10 are reserved on one end surface of the quick-release working head 7, and the plurality of clamping blocks 11 are arranged at equal angles in a circular direction;

[0047] Among them, inserting the second block 11 through the gap into the interior of the annular connecting seat 2 and then rotating the quick-release working head 7 can clamp the second block 11 on the inner side of the first block 13, and at the same time enable the locking tongue 10 to be inserted into the locking hole 12, thereby achieving the purpose of locking the quick-release working head 7 on the annular connecting seat 2.

[0048] Among them, pressing the locking button 6 and rotating the quick-release working head 7 in the opposite direction can separate the block 2 11 from the block 1 13, and at the same time enable the locking tongue 10 to be pulled out of the locking hole 12, thereby achieving the purpose of unlocking and removing the quick-release working head 7 from the annular connecting seat 2.

[0049] Specifically, in the present embodiment, the electric drive mechanism includes a motor 17, a driving bevel gear 19, a mounting plate 14, a driven shaft 15 and a driven bevel gear 20. The motor 17 is fixedly mounted inside the housing 1. The driving bevel gear 19 is arranged inside the housing 1 and fixedly mounted on the output shaft end of the motor 17. The mounting plate 14 is fixedly mounted inside the housing 1. The driven shaft 15 is rotatably mounted on the mounting plate 14 through a second bearing, and a regular hexagonal socket 16 is provided at one end of the driven shaft 15 facing the quick-release working head 7. The driven bevel gear 20 is fixedly mounted on the other end of the driven shaft 15, and the driven bevel gear 20 is meshed with the driving bevel gear 19. A regular hexagonal plug block 29 is fixedly mounted on one end of the connecting shaft 28, and the regular hexagonal plug block 29 is inserted into the interior of the regular hexagonal socket 16.

[0050] The electric drive mechanism using the above technical solution is mainly composed of a motor 17, an active bevel gear 19, a mounting plate 14, a driven shaft 15 and a driven bevel gear 20. The motor 17 is used to drive the active bevel gear 19 to drive the driven bevel gear 20 to rotate, and the driven bevel gear 20 is used to drive the driven shaft 15 to drive the working head to rotate at high speed for grinding and polishing operations. The regular hexagonal plug block 29 cooperates with the regular hexagonal socket 16 to achieve the purpose of quick disassembly and assembly of the quick-release working head 7 while being connected to the electric drive mechanism.

[0051] Specifically, in the present embodiment, in order to improve the stability of the driven bevel gear 20 during rotation, a connecting rod 25 is centrally fixedly installed on one end face of the driven bevel gear 20 away from the driven shaft 15, and a bearing three 26 is fixedly installed on one end of the connecting rod 25 away from the driven bevel gear 20, and the outer ring of the bearing three 26 is fixedly connected to the inner wall of the housing 1. The cooperation between the bearing three 26 and the connecting rod 25 can improve the stability of the driven bevel gear 20 during rotation.

[0052] Specifically, in this embodiment, in order to dissipate the heat of the motor 17 itself, a fan blade 18 is fixedly mounted on the output shaft of the motor 17, the fan blade 18 is located inside the outer shell 1, and a heat dissipation channel 30 connected to the fan blade 18 is provided on the outer shell 1. When the motor 17 is working, the fan blade 18 can be driven to rotate to dissipate the heat itself.

[0053] Specifically, in this embodiment, in order to facilitate the power supply to the motor 17, a battery compartment 4 for installing a power supply battery is integrated at the rear end of the handle 3, and the battery compartment 4 is electrically connected to the motor 17. The motor 17 can be powered by simply installing the power supply battery in the battery compartment 4.

[0054] Specifically, in this embodiment, in order to facilitate the operation of the motor 17 , a control switch 5 is installed on the housing 1 near the handle 3 , and the control switch 5 is connected in series between the battery compartment 4 and the motor 17 .

[0055] Specifically, in this embodiment, in order to display the working status of the power tool, a display panel 9 is also installed on the housing 1. The display panel 9 has a display screen and an indicator light, and an MCU controller is installed in the display panel 9. The MCU controller is electrically connected to the display screen and the indicator light of the motor 17, respectively. The MCU controller can be used to control the display screen and the indicator light to display the working status of the power tool.

[0056] It is worth mentioning that the MCU controller can use the STC89C51 microcontroller.

[0057] Specifically, in the present embodiment, the quick-release working head 7 can be a 12mm eccentric grinding and polishing working head, a 3mm eccentric grinding and polishing working head, a 5mm eccentric grinding and polishing working head, a large torque concentric polishing working head (an adapter can be added to form a quick-change joint), a high-speed concentric polishing working head (an extension rod can be added), etc., which can meet different grinding and polishing needs. The quick-release working head 7 can include a matching grinding sheet 8. When replaced, the quick-release working head 7 is clamped with the annular connecting seat 2 through a quick clamping mechanism, so that the quick-release working head 7 can be quickly replaced as a whole, supporting tool-free quick switching of working heads with different functions such as concentric and eccentric working heads, simple operation, convenient and fast, and more efficient work.

[0058] When in use, install the battery in the battery compartment 4 to power the motor 17, hold the quick-release working head 7 with your hand, insert the second block 11 through the gap into the interior of the annular connecting seat 2, and then rotate the quick-release working head 7 to clamp the second block 11 on the inner side of the first block 13, and at the same time, insert the locking tongue 10 into the locking hole 12 to lock the quick-release working head 7 on the annular connecting seat 2; press the locking button 6 to rotate the quick-release working head 7 in the opposite direction to separate the second block 11 from the first block 13, and at the same time, pull the locking tongue 10 out of the locking hole 12, so that the quick-release working head 7 can be unlocked and removed from the annular connecting seat 2, which is convenient for replacing working heads of different models as needed.

[0059] Holding the handle 3, the motor 17 is controlled by the control switch 5, and the working status of the power tool is checked through the display panel 9. The motor 17 drives the active bevel gear 19 to drive the driven bevel gear 20 to rotate. The driven bevel gear 20 is used to drive the driven shaft 15 to drive the working head to rotate at high speed to perform operations such as grinding and polishing.

[0060] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric tool for facilitating replacement of a working head, characterized in that: include: The rear end of the shell is integrally provided with a handle, and the front end side of the shell is integrally provided with an annular connecting seat, and the annular connecting seat is provided with a quick clamping mechanism, A quick-release working head, the quick-release working head is clamped with the annular connecting seat through the quick clamping mechanism, and a connecting shaft is rotatably mounted inside the quick-release working head through a bearing; The electric drive mechanism is installed inside the shell and is drivingly connected to one end of the connecting shaft.

2. The electric tool for facilitating replacement of a working head according to claim 1, characterized in that: The quick clamping mechanism comprises two locking buttons movably mounted on the annular connecting seat and a plurality of clamping blocks integrally arranged on the inner ring surface of the annular connecting seat, wherein: The two locking buttons are symmetrically arranged, a limiting column 1 is fixedly installed on the inner side of each locking button, and a locking tongue is fixedly installed on a side wall of each locking button facing the quick-release working head, a spring is sleeved on the limiting column 1, and a limiting column 2 is inserted into the end of the spring away from the locking button, and a fixing plate is fixedly installed on the end of the limiting column 2 away from the locking button, and the fixing plate is fixedly installed inside the annular connecting seat; A plurality of the first clamping blocks are distributed at equal angles in an annular direction on the inner annular surface of the annular connecting seat, and there is a gap between two adjacent first clamping blocks; The quick-release working head is in a cylindrical structure as a whole, and a plurality of clamping blocks 2 are integrally provided on the edge of one end of the quick-release working head, and two lock holes matching the lock tongue are reserved on one end surface of the quick-release working head, and the plurality of clamping blocks 2 are arranged at equal angles in a circular direction; Insert the second clamping block through the gap into the interior of the annular connecting seat and then rotate the quick-release working head to clamp the second clamping block inside the first clamping block, while allowing the locking tongue to be inserted into the locking hole; Pressing the locking button and rotating the quick-release working head in the opposite direction can separate the second clamping block from the first clamping block, and at the same time enable the locking tongue to be pulled out of the locking hole.

3. The electric tool for facilitating replacement of a working head according to claim 2, characterized in that: The electric drive mechanism includes a motor, a driving bevel gear, a mounting plate, a driven shaft and a driven bevel gear. The motor is fixedly mounted inside the housing, the driving bevel gear is arranged inside the housing and fixedly mounted on the end of the output shaft of the motor, the mounting plate is fixedly mounted inside the housing, the driven shaft is rotatably mounted on the mounting plate through bearing 2, and a regular hexagonal socket is provided at one end of the driven shaft facing the quick-release working head, the driven bevel gear is fixedly mounted on the other end of the driven shaft, and the driven bevel gear is meshed with the driving bevel gear, and a regular hexagonal plug block is fixedly mounted on one end of the connecting shaft, and the regular hexagonal plug block is inserted into the interior of the regular hexagonal socket.

4. The electric tool for facilitating replacement of a working head according to claim 3, characterized in that: A connecting rod is fixedly installed in the center of one end face of the driven bevel gear away from the driven shaft, and a bearing three is fixedly installed at one end of the connecting rod away from the driven bevel gear, and the outer ring of the bearing three is fixedly connected to the inner wall of the shell.

5. The electric tool for facilitating replacement of working heads according to claim 3, characterized in that: The output shaft of the motor is fixedly sleeved with a fan blade, the fan blade is located inside the shell, and the shell is provided with a heat dissipation channel communicated with the fan blade.

6. The electric tool for facilitating replacement of a working head according to claim 3, characterized in that: A battery compartment for installing a power supply battery is integrally provided at the rear end of the handle, and the battery compartment is electrically connected to the motor.

7. The electric tool for facilitating replacement of a working head according to claim 6, characterized in that: A control switch is installed on the housing at a position close to the handle, and the control switch is connected in series between the battery compartment and the motor.

8. The electric tool for facilitating replacement of a working head according to claim 6, characterized in that: A display panel is also installed on the housing, and the display panel has a display screen and an indicator light.

Images