Tool head lock catch structure of electric tool

Abstract

The utility model belongs to the technical field of electric tools, in particular to a tool head lock catch structure of an electric tool, which comprises a machine body, a tool head and a locking mechanism, a connecting end is arranged on the machine body, a connecting part is arranged on one side, facing the connecting end, of the tool head, the connecting part is arranged in the connecting end, and the locking mechanism comprises a locking ring. A plurality of first locking buckles and first locking blocks are annularly arranged on the locking ring, a plurality of second locking blocks and second locking buckles are annularly arranged on the connecting part, first locking grooves and second locking grooves are formed in the first locking buckles and the second locking buckles respectively, a shifting part is arranged on the locking ring, and the locking ring can be driven to rotate by driving the shifting part. The first locking block and the second locking block can be clamped into the second locking groove and the first locking groove respectively at the moment, the shifting part is driven to rotate reversely at the moment, the first locking block and the second locking block are separated from the second locking groove and the first locking groove respectively at the moment, a dual lock catch structure is achieved, and the tool head can be installed on the machine body more stably and firmly.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tools, in particular to a tool head locking structure of an electric tool. Background Art

[0002] Existing power tools are equipped with a motor and a transmission structure in a body, and then a tool head is connected to the front end of the body. The transmission structure drives the transmission structure in the tool head, so that the working end of the tool head produces a rotational or reciprocating movement, so that it can be used to process objects or screw objects. In order to facilitate the disassembly and replacement of the tool head, most power tools on the market usually have a locking device between the tool head and the body, so that the tool head can be quickly installed on the body. For example, in Chinese patent CN216030622U, the tool head is mainly inserted into the socket of the body shell through the socket during installation. At this time, the connecting barrel on the socket will pass through the swivel in the body shell, and the multiple buckle blocks at the end of the barrel will be located at the swivel. At this time, after the rotating ring is driven to move toward the first direction by the shift rod, the limit block on the rotating ring will move to the front of the buckle block, so that the limit block and the buckle block enter a locking state, thereby limiting the barrel from being separated from the body shell, so that the tool head can be smoothly installed on the body. The tool head on the above-mentioned power tool is mainly connected with the limit block on the rotating ring and the buckle block at the end of the barrel, so that the tool head is locked to the body. However, due to the small contact area between the limit block and the buckle block, the locking force between the tool head and the body is poor. After the tool head has been working for a long time, the connection between the tool head and the body is easy to loosen, causing the tool head to shake, affecting the operator's use, and the tool head may even fall to the ground, causing casualties. Summary of the Invention

[0003] The purpose of the utility model is to provide a simple structure with a double locking structure, so that the tool head can be installed on the machine body more stably and firmly, avoiding the situation where the connection between the tool head and the machine body becomes loose after the tool head is used for a long time.

[0004] The purpose of this utility model is achieved in this way:

[0005] A tool head locking structure of an electric tool comprises a body, a tool head detachably mounted on the body, and a locking mechanism arranged between the body and the tool head, wherein the body is provided with a connecting end, the tool head is provided with a connecting portion on a side facing the connecting end, the connecting portion is arranged in the connecting end, the locking mechanism comprises a locking ring arranged in the connecting end, a plurality of first locking buckles and a first locking block are arranged on the locking ring, a plurality of second locking blocks and a second locking buckle are respectively arranged on the connecting portion and cooperate with the plurality of first locking buckles and the first locking block, the first locking buckle The first and second locking blocks are respectively engaged with each other in the second locking groove and the first locking groove, and the second locking block is respectively engaged with the second locking block and the first locking block, thereby releasing the locking state between the tool head and the body. The toggle portion is driven to rotate in the opposite direction, and the first locking block and the second locking block are respectively disengaged from the second locking groove and the first locking groove, thereby releasing the locking state between the tool head and the body.

[0006] Furthermore, the first locking buckle includes an integrally formed first connecting plate and a first snap portion, the first snap portion is "L"-shaped and is horizontally arranged at the top end of the first connecting plate, the first locking block is located on one side of the first connecting plate and is integrally formed with the first connecting plate, and the second locking buckle includes an integrally formed second connecting plate and a second snap portion, the second snap portion is "L"-shaped and is horizontally arranged at the top end of the second connecting plate, the second locking block is located on one side of the second connecting plate and is integrally formed with the second connecting plate.

[0007] Furthermore, the rear side surface of the first connecting plate is provided with reinforcing ribs.

[0008] Furthermore, a first mounting groove is provided in the fuselage, the first mounting groove is located on the rear side of the locking ring, and the first mounting groove is provided with an opening on the side facing the locking ring, a main damping block is movably provided in the first mounting groove, the front end of the main damping block passes through the opening and is exposed outside the first mounting groove, a main damping protrusion is provided at the front end of the main damping block, and an upper damping groove and a lower damping groove are provided on the back side of the locking ring, the main damping protrusion can be stuck in the upper damping groove or the lower damping groove and abut against the locking ring, a main damping spring is also provided in the first mounting groove, and the two ends of the main damping spring are respectively abutted against the inner wall of the first mounting groove and the rear end of the main damping block.

[0009] Furthermore, a second mounting groove is provided in the fuselage, the second mounting groove is located on the right side of the locking ring, and the second mounting groove is provided with an opening on the side facing the locking ring, a secondary damping block is movably provided in the second mounting groove, the front end of the secondary damping block passes through the opening and is exposed outside the second mounting groove, a secondary damping protrusion is provided at the front end of the secondary damping block, and an upper damping notch and a lower damping notch are provided on the side of the locking ring, the secondary damping protrusion can be inserted into the upper damping notch or the lower damping notch and connected with the locking ring, and a secondary damping spring is also provided in the second mounting groove, and the two ends of the secondary damping spring are respectively abutted against the inner wall of the second mounting groove and the rear end of the secondary damping block.

[0010] Furthermore, the rear ends of the main damping block and the auxiliary damping block are both provided with limiting grooves, and the main damping spring and the auxiliary damping spring are respectively arranged in the limiting grooves of the main damping block and the auxiliary damping block.

[0011] Furthermore, abutment portions are symmetrically provided on both inner walls of the first mounting groove and the second mounting groove, and clamping portions are provided on both sides of the main damping block and the auxiliary damping block, and the clamping portions are arranged between the symmetrical abutment portions.

[0012] Furthermore, a sliding groove is provided in the fuselage, a push plate is provided for sliding in the sliding groove, an installation groove is provided on the push plate, a first limit column and a second limit column are provided in the installation groove, a push spring is provided in the installation groove, the front end of the push spring is sleeved on the first limit column, and the rear end of the push spring is sleeved on the second limit column, limiting parts are provided on both sides of the inner wall of the sliding groove, a limiting protrusion is provided on the top of the limiting part, the front end of the push spring is in contact with the limiting plate and the limiting protrusion, and a connecting block is also provided on the tool head, and the connecting block can be inserted into the sliding groove.

[0013] Furthermore, a driving motor and a control button for controlling the operation of the driving motor are also provided in the fuselage. The driving motor is provided with a power output shaft, and the power output shaft is located in the connecting end. A power transmission shaft and a driving assembly connected to the power transmission shaft are provided in the tool head. A connecting hole is provided on the connecting portion, and the power transmission shaft is arranged in the connecting hole. A bearing groove is provided on the inner wall of the connecting hole. A bearing is sleeved on the power transmission shaft, and the bearing is arranged in the bearing groove. A connecting hole is provided on the power transmission shaft. After the connecting portion is inserted into the connecting end, the power output shaft is inserted into the connecting hole of the power transmission shaft.

[0014] Furthermore, a toggle groove is provided on the body, and the toggle portion passes through the toggle groove and is exposed outside the body.

[0015] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0016] The utility model belongs to the technical field of electric tools, and particularly refers to a tool head replacement structure of an electric tool, comprising a body, a tool head and a locking mechanism arranged between the body and the tool head, and a ring on the connecting portion of the tool head is provided with a plurality of second locking blocks and a second locking buckle, the locking mechanism comprises a locking ring, and a toggle portion on the locking ring is exposed outside the body, so that it is convenient for the user to drive the locking ring to rotate by the toggle portion, so that the tool head can be quickly installed on the body, and because the locking ring is arranged in the connecting end, the first locking buckle and the first locking block on the locking ring are respectively the same in number as the second locking block and the second locking buckle on the tool head, and the locking ring, the first locking buckle, the first locking block and the toggle portion are all integrally formed, which is convenient for workers to assemble, and the integral forming can increase The overall strength of the component is increased and its service life is increased. When the user wants to install the tool head on the fuselage, the user needs to first insert the connecting part on the tool head into the connecting end of the fuselage. At this time, the user drives the locking ring to rotate synchronously by toggling the toggle part. Since the second locking buckle on the tool head and the first locking buckle on the locking ring are respectively provided with a second locking groove and a first locking groove, when the locking ring rotates, the first locking block on the locking ring will rotate synchronously with the locking ring, so that the first locking block enters the second locking groove and is engaged with the second locking buckle. The first locking block and the second locking buckle are engaged as a first-level locking structure. At the same time, the first locking buckle on the locking ring will also rotate synchronously with the locking ring, so that the second locking block can smoothly enter the first locking groove. The first locking buckle is engaged with the first locking buckle in the groove, and the first locking buckle is engaged with the second locking block to form a second locking structure, so that the tool head can be stably installed on the connecting end of the fuselage. When the user wants to remove the tool head from the fuselage, the user only needs to reversely dial the dial part to drive the locking ring to rotate in the opposite direction synchronously. At this time, the first locking block on the locking ring will be disengaged from the second locking groove and the second locking buckle to be disengaged. At the same time, the second locking block on the connecting part can be disengaged from the first locking groove and the first locking buckle to be disengaged, so that the connecting part on the tool head and the locking ring in the fuselage are unlocked, so that the tool head can be smoothly separated from the fuselage. Compared with the current contact area between the tool head and the fuselage on the power tools on the market The second locking buckle and the second locking buckle can greatly increase the contact area between the connecting part on the tool head and the locking ring, thereby making the locking force between the connecting part on the tool head and the locking ring in the body greater, so that the tool head can be stably and firmly installed on the connecting end of the body. When the tool head works for a long time, the connection between the tool head and the body will not loosen, which will not affect the normal use of the user.Avoid the tool head falling to the ground during operation and causing casualties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the present utility model.

[0018] Figure 2 This is one of the exploded views of the body and tool head of the utility model.

[0019] Figure 3 This is the second exploded view of the body and tool head of the utility model.

[0020] Figure 4 It is a three-dimensional diagram of the fuselage of the utility model.

[0021] Figure 5 It is a schematic diagram of the internal structure of the fuselage of the utility model.

[0022] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0023] Figure 7 It is a structural schematic diagram of the fuselage of the utility model.

[0024] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0025] Figure 9 It is a structural diagram of the locking ring, the main damping block and the auxiliary damping block of the utility model.

[0026] Figure 10 It is an exploded view of the locking ring, the main damping block and the auxiliary damping block of the utility model.

[0027] Figure 11 It is a structural diagram of the locking ring of the utility model.

[0028] Figure 12 It is a stereogram of the locking ring of the utility model.

[0029] Figure 13 It is a three-dimensional diagram of the push plate and the push spring of the utility model.

[0030] Figure 14 This is one of the exploded views of the main damping block and the main damping spring, and the auxiliary damping block and the auxiliary damping spring of the utility model.

[0031] Figure 15 This is the second exploded view of the main damping block and the main damping spring, and the auxiliary damping block and the auxiliary damping spring of the utility model.

[0032] Figure 16It is a structural schematic diagram of the utility model in which the tool head and the locking ring are in a locked state.

[0033] Figure 17 It is a structural schematic diagram of the tool head and the locking ring of the utility model in an unlocked state.

[0034] Figure 18 It is a three-dimensional diagram of the tool head of the utility model.

[0035] Figure 19 It is a structural schematic diagram of the tool head of the utility model.

[0036] Figure 20 It is an exploded view of the tool head, power transmission shaft and bearing of the utility model.

[0037] Figure 21 It is a schematic diagram of the structure inside the tool head of the utility model.

[0038] The meaning of the numbers in the figure:

[0039] 1-body; 2-tool head; 3-connecting end; 4-connecting part; 5-locking ring; 6-first locking buckle;

[0040] 7-first locking block; 8-second locking block; 9-second locking buckle; 10-first locking groove;

[0041] 11-second locking groove; 12-sliding portion; 13-first connecting plate; 14-first buckle portion;

[0042] 15-second connecting plate; 16-second buckle portion; 17-reinforcement rib; 18-first mounting slot;

[0043] 19-main damping block; 20-main damping protrusion; 21-upper damping groove; 22-lower damping groove;

[0044] 23-main damping spring; 24-second mounting slot; 25-auxiliary damping block; 26-auxiliary damping protrusion;

[0045] 27-upper damping notch; 28-lower damping notch; 29-auxiliary damping spring; 30-limiting groove;

[0046] 31-abutting portion; 32-clamping portion; 33-sliding groove; 34-pushing plate; 35-installation groove;

[0047] 36-first limiting column; 37-second limiting column; 38-pushing spring; 39-limiting portion;

[0048] 40-limiting protrusion; 41-connecting block; 42-driving motor; 43-control button;

[0049] 44-power output shaft; 45-power transmission shaft; 46-drive assembly; 47-connection hole;

[0050] 48-bearing groove; 49-bearing; 50-connecting hole; 51-sliding groove. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with specific embodiments:

[0052] The present invention belongs to the technical field of electric tools, and particularly refers to a tool head replacement structure for an electric tool, comprising a body 1, a tool head 2, and a locking mechanism arranged between the body 1 and the tool head 2, and a ring is provided on the connecting portion 4 of the tool head 2 with a plurality of second locking blocks 8 and a second locking buckle 9, the locking mechanism comprises a locking ring 5, and a toggle portion 12 on the locking ring 5 is exposed outside the body 1, so that the user can drive the locking ring 5 to rotate by toggle portion 12, so that the tool head 2 can be quickly installed on the body 1, and because the locking ring 5 is arranged in the connecting end 3, the first locking buckle 6 and the first locking block 7 on the locking ring 5 are respectively the same in number as the second locking block 8 and the second locking buckle 9 on the tool head 2, and the locking ring 5, the first locking buckle 6, the first locking block 7 and the toggle portion 12 are ... The moving parts 12 are all integrally formed, which is convenient for workers to assemble, and the integral forming can increase the overall strength of the components and increase their service life. When the user wants to install the tool head 2 on the fuselage 1, the user needs to first insert the connecting part 4 on the tool head 2 into the connecting end 3 of the fuselage 1. At this time, the user drives the locking ring 5 to rotate synchronously by toggling the toggle part 12. Since the second locking buckle 9 on the tool head 2 and the first locking buckle 6 on the locking ring 5 are respectively provided with the second locking groove 11 and the first locking groove 10, when the locking ring 5 rotates, the first locking block 7 on the locking ring 5 will rotate synchronously with the locking ring 5, so that the first locking block 7 enters the second locking groove 11 and is engaged with the second locking buckle 9. The first locking block 7 and the second locking buckle 9 are engaged as the first locking block 7. The second locking block 8 on the connecting part 4 can be disengaged from the first locking groove 10 and the first locking buckle 6 to release the clamping state. The tool head 2 is in a locked state with the locking ring 5 in the body 1, thereby releasing the locking state of the connecting portion 4 on the tool head 2 and the locking ring 5 in the body 1, so that the tool head 2 can be smoothly separated from the body 1. Compared with the current power tools on the market, the contact area between the tool head 2 and the body 1 is smaller, resulting in a poor locking force between the tool head 2 and the body 1. After the tool head 2 has been working for a long time, the connection between the tool head 2 and the body 1 is easy to loosen, causing the tool head 2 to shake, affecting the operator's use. The utility model adopts a double locking structure to make the connecting portion 4 on the tool head 2 and the locking ring 5 in the body 1 lock each other, and the first locking block 7, the second locking buckle 9 and the second locking block 8, the first locking buckle 6 can greatly increase the contact area between the connecting portion 4 on the tool head 2 and the locking ring 5.This increases the locking force between the connecting portion 4 on the tool head 2 and the locking ring 5 inside the body 1, allowing the tool head 2 to be stably and securely mounted on the connecting end 3 of the body 1. After the tool head 2 has been working for a long time, the connection between the tool head 2 and the body 1 will not become loose, which will not affect the user's normal use and prevent the tool head 2 from falling to the ground during operation and causing casualties.

[0053] Preferably, the first locking buckle 6 includes an integrally formed first connecting plate 13 and a first snap portion 14, the first snap portion 14 is "L"-shaped and is laterally arranged at the top end of the first connecting plate 13, the first locking block 7 is located on one side of the first connecting plate 13 and is integrally formed with the first connecting plate 13, the second locking buckle 9 includes an integrally formed second connecting plate 15 and a second snap portion 16, the second snap portion 16 is "L"-shaped and is laterally arranged at the top end of the second connecting plate 15, the second locking block 8 is located on one side of the second connecting plate 15 and is integrally formed with the second connecting plate 15; since the first locking buckle 6 includes an integrally formed first connecting plate 13 and a first snap portion 14, the second locking buckle 9 includes an integrally formed second connecting plate 15 and a second snap portion 16, and the integrally formed The overall firmness of the first locking buckle 6 and the second locking buckle 9 is better, which can increase the service life of the first locking buckle 6 and the second locking buckle 9, and the first locking block 7 on the locking ring 5 is located on one side of the first connecting plate 13 and is integrally formed with the first connecting plate 13, while the second locking block 8 on the connecting part 4 is located on one side of the second connecting plate 15 and is integrally formed with the second connecting plate 15, which is equivalent to the first locking block 7 on the locking ring 5 and the first locking buckle 6 being arranged together and integrally formed with the first locking buckle 6, while the second locking block 8 on the connecting part 4 is arranged together and integrally formed with the second locking buckle 9, thereby making the locking force between the first locking block 7 and the second locking buckle 9 and the first locking buckle 6 and the second locking block 8 stronger, so that the tool head 2 can be more firmly installed on the fuselage 1.

[0054] Preferably, a reinforcing rib 17 is provided on the rear side of the first connecting plate 13; the provision of the reinforcing rib 17 can increase the overall firmness of the first connecting plate 13, and avoid the first connecting plate 13 from breaking, which may result in the tool head 2 being unable to be smoothly installed on the fuselage 1.

[0055] Preferably, a first mounting groove 18 is provided in the fuselage 1, and the first mounting groove 18 is located on the rear side of the locking ring 5, and the first mounting groove 18 is provided with an opening on the side facing the locking ring 5, and a main damping block 19 is movably provided in the first mounting groove 18, and the front end of the main damping block 19 is exposed outside the first mounting groove 18 through the opening, and the front end of the main damping block 19 is provided with a main damping protrusion 20, and the back side of the locking ring 5 is provided with an upper damping groove 21 and a lower damping groove 22, and the main damping protrusion 20 can be stuck in the upper damping groove 21 or the lower damping groove 22 and abut against the locking ring 5, and a main damping spring 23 is further provided in the first mounting groove 18, and the two ends of the main damping spring 23 are respectively engaged with the inner wall of the first mounting groove 18 and the main damping block 1 9 abuts against the rear end of the first mounting groove 18; the setting of the first mounting groove 18 enables the main damping block 19 to be smoothly installed in the fuselage 1, avoiding the main damping block 19 from moving arbitrarily in the fuselage 1, and the first mounting groove 18 has an opening on the side facing the locking ring 5, so that the front end of the main damping block 19 can be smoothly exposed outside the first mounting groove 18, so that the main damping protrusion 20 at the front end of the main damping block 19 can be smoothly inserted into the upper damping groove 21 or the lower damping groove 22 on the back side of the locking ring 5. When the tool head 2 has not yet been installed on the fuselage 1, the main damping protrusion 20 is located in the upper damping groove 21. Since the two ends of the main damping spring 23 in the first mounting groove 18 abut against the inner wall of the first mounting groove 18 and the rear end of the main damping block 19 respectively, the main damping spring The spring 23 will apply a pressure to the main damping block 19, so that the locking ring 5 cannot rotate by itself, realizing the function of the reverse lock, and will not affect the insertion of the connecting portion 4 of the tool head 2 into the connecting end 3 of the fuselage 1. When the user inserts the connecting portion 4 of the tool head 2 into the connecting end 3 of the fuselage 1, the user applies a certain force to the toggle portion 12, and then the locking ring 5 can be driven to rotate in the connecting end 3 through the toggle portion 12. After the locking ring 5 is rotated to a certain position, the first locking buckle 6 and the second locking block 8 as well as the first locking block 7 and the second locking buckle 9 will enter a locking state, so that the tool head 2 can be smoothly installed on the connecting end 3 of the fuselage 1. In this process, since the main damping protrusion 20 is an arc-shaped protrusion, and the upper damping groove 21 and the lower damping groove 22 are They are all arc-shaped grooves, so when the locking ring 5 rotates, the locking ring 5 will push the main damping block 19 inward through the upper damping groove 21, so that the main damping spring 23 enters a compressed state. When the locking ring 5 rotates to a certain angle, the position of the main damping protrusion 20 on the main damping block 19 corresponds to the position of the lower damping groove 22. The compressed main damping spring 23 will push the main damping block 19 to move outward, so that the main damping protrusion 20 on the main damping block 19 enters the lower damping groove 22. Therefore, when the tool head 2 is installed on the fuselage 1, the locking ring 5 cannot rotate by itself, thereby preventing the first locking buckle 6 and the second locking block 8 and the first locking block 7 and the second locking buckle 9 from automatically releasing the locking state during the operation of the tool head 2.

[0056] Preferably, a second mounting groove 24 is further provided in the fuselage 1, and the second mounting groove 24 is located on the right side of the locking ring 5, and the second mounting groove 24 is provided with an opening on the side facing the locking ring 5, and a secondary damping block 25 is movably provided in the second mounting groove 24, and the front end of the secondary damping block 25 passes through the opening and is exposed outside the second mounting groove 24, and the front end of the secondary damping block 25 is provided with a secondary damping protrusion 26, and the side of the locking ring 5 is provided with an upper damping notch 27 and a lower damping notch 28, and the secondary damping protrusion 26 can be snapped into the upper damping notch 27 or the lower damping notch 28 and snapped with the locking ring 5, and a secondary damping spring 29 is further provided in the second mounting groove 24, and the two ends of the secondary damping spring 29 are respectively engaged with the inner wall of the second mounting groove 24 and the secondary damping block The rear end of the auxiliary damping block 25 abuts against each other; the setting of the second mounting groove 24 enables the auxiliary damping block 25 to be smoothly installed in the fuselage 1, avoiding the auxiliary damping block 25 from moving arbitrarily in the fuselage 1, and the second mounting groove 24 has an opening on the side facing the locking ring 5, so that the front end of the auxiliary damping block 25 can be smoothly exposed outside the second mounting groove 24, so that the auxiliary damping protrusion 26 at the front end of the auxiliary damping block 25 can be smoothly inserted into the upper damping notch 27 or the lower damping notch 28 on the side of the locking ring 5. When the tool head 2 has not yet been installed on the fuselage 1, the auxiliary damping protrusion 26 is located in the upper damping notch 27. Since the two ends of the auxiliary damping spring 29 in the second mounting groove 24 abut against the inner wall of the second mounting groove 24 and the rear end of the auxiliary damping block 25 respectively, the auxiliary damping The spring 29 will apply a pressure to the secondary damping block 25, so that the locking ring 5 cannot rotate by itself, and will not affect the insertion of the connecting portion 4 of the tool head 2 into the connecting end 3 of the fuselage 1. When the user inserts the connecting portion 4 of the tool head 2 into the connecting end 3 of the fuselage 1, the user applies a certain force to the toggle portion 12, and the locking ring 5 can be driven to rotate in the connecting end 3 through the toggle portion 12. When the locking ring 5 is rotated to a certain position, the first locking buckle 6 and the second locking block 8 as well as the first locking block 7 and the second locking buckle 9 will enter a locking state, so that the tool head 2 can be smoothly installed on the connecting end 3 of the fuselage 1, and the shape of the secondary damping protrusion 26 is the same as that of the main damping protrusion 20, and the upper damping notch 27 and the lower damping notch 28 are arc-shaped notches. When the locking ring 5 is rotated, the locking ring 5 pushes the secondary damping block 25 inward through the upper damping notch 27, causing the secondary damping spring 29 to enter a compressed state. When the locking ring 5 is rotated to a certain angle, the position of the secondary damping protrusion 26 corresponds to the position of the lower damping notch 28, and the compressed secondary damping spring 29 pushes the secondary damping block 25 outward, causing the secondary damping protrusion 26 to enter the lower damping notch 28. As a result, when the tool head 2 is installed on the fuselage 1, the locking ring 5 cannot rotate on its own, preventing the first locking buckle 6 and the second locking block 8, as well as the first locking block 7 and the second locking buckle 9 from automatically releasing the locking state during the operation of the tool head 2. When the secondary damping protrusion 26 enters the lower damping notch,The main damping protrusion 20 on the main damping block 19 located in the first mounting groove 18 will enter the lower damping groove 22, so that the main damping block 19 and the auxiliary damping block 25 cooperate with each other to achieve a double damping effect on the locking ring 5, ensuring that the locking ring 5 cannot rotate on its own without external force, which is more stable and reliable. When the main damping protrusion 20 corresponds to the position of the upper damping groove 21 or the lower damping groove 22, under the push of the main damping spring 23, the main damping protrusion 20 enters the upper damping groove 21 or the lower damping groove 22 and hits the inner wall of the upper damping groove 21 or the lower damping groove 22, thereby producing a hitting sound, and the auxiliary damping protrusion 26 enters the upper damping notch 27 and the lower damping notch 28 and also produces a hitting sound, thereby notifying the user that the tool head 2 and the body 1 have entered the locked state or the unlocked state, thereby facilitating the user to perform the next operation and increasing the practicality of the product.

[0057] Preferably, the rear ends of the main damping block 19 and the auxiliary damping block 25 are both provided with a limiting groove 30, and the main damping spring 23 and the auxiliary damping spring 29 are respectively arranged in the limiting grooves 30 of the main damping block 19 and the auxiliary damping block 25; one end of the main damping spring 23 is arranged in the limiting groove 30 on the main damping block 19, thereby ensuring that the main damping spring 23 can always abut against the main damping block 19, and one end of the auxiliary damping spring 29 is arranged in the limiting groove 30 of the auxiliary damping block 25, thereby ensuring that the auxiliary damping spring 29 can always abut against the auxiliary damping block 25, so that the locking ring 5 cannot rotate on its own.

[0058] Preferably, the inner walls on both sides of the first mounting groove 18 and the second mounting groove 24 are symmetrically provided with abutment parts 31, and the main damping block 19 and the auxiliary damping block 25 are both provided with clamping parts 32 on both sides, and the clamping parts 32 are arranged between the symmetrical abutment parts 31; since the clamping parts 32 on both sides of the main damping block 19 are respectively arranged between the abutment parts 31 on both sides of the first mounting groove 18, when the worker assembles the main damping block 19 and the main damping spring 23 to the first mounting groove 18, the main damping spring 23 cannot completely push the main damping block 19 out of the first mounting groove 18, and since the clamping parts 32 on both sides of the auxiliary damping block 25 are respectively arranged between the abutment parts 31 on both sides of the second mounting groove 24, when the worker assembles the auxiliary damping block 25 and the auxiliary damping spring 29 into the second mounting groove 24, the auxiliary damping spring 29 cannot completely push the auxiliary damping block 25 out of the second mounting groove 24, which will not affect the worker's subsequent assembly.

[0059] Preferably, a sliding groove 33 is provided in the fuselage 1, a push plate 34 is slidably provided in the sliding groove 33, a mounting groove 35 is provided on the push plate 34, a first limiting column 36 and a second limiting column 37 are provided in the mounting groove 35, a push spring 38 is provided in the mounting groove 35, the front end of the push spring 38 is sleeved on the first limiting column 36, and the rear end of the push spring 38 is sleeved on the second limiting column 37, both sides of the inner wall of the sliding groove 33 are provided with a limiting portion 39, the top of the limiting portion 39 is provided with a limiting protrusion 40, the front end of the push spring 38 is in contact with the limiting protrusion 40, and the front end of the push spring 38 is in contact with the limiting protrusion 40. The plate and the limiting protrusion 40 are in contact with each other, and the tool head 2 is further provided with a connecting block 41, which can be inserted into the sliding groove 33; when the connecting portion 4 on the tool head 2 is inserted into the connecting end 3 of the fuselage 1, the connecting block 41 on the tool head 2 will be inserted into the sliding groove 33 of the fuselage 1, and the connecting block 41 will push the push plate 34 in the sliding groove 33 to move inward. Since there is a pushing spring 38 in the mounting groove 35 of the pushing plate 34, and the front and rear ends of the pushing spring 38 are respectively sleeved on the first limiting column 36 and the second limiting column 37 of the mounting groove 35, the pushing spring 38 The push plate 34 is actuated to move the push spring 38 in the guide rail 35 so that the push spring 38 can be smoothly installed in the installation groove 35 and limit the random movement of the push spring 38 in the installation groove 35. When assembling, the worker only needs to install the separate push plate 34 in the sliding groove 33, which is convenient for the worker to assemble. Since the front end of the push spring 38 abuts against the limiting portions 39 on both sides of the inner wall of the sliding groove 33 and the limiting protrusion 40 at the top of the limiting portion 39, when the push plate 34 moves inward, it compresses the push spring 38, causing the push spring 38 to enter a compressed state. The setting of the limiting protrusion 40 can increase the contact area with the front end surface of the push spring 38, thereby making the push spring The force on 38 is more evenly distributed. When the toggle portion 12 is toggled, the first locking block 7 and the second locking buckle 9 as well as the first locking buckle 6 and the second locking block 8 are released from the locked state. At this time, the compressed push spring 38 will push the push plate 34 to move outward. When the push plate 34 moves outward, it will push the connecting block 41 on the tool head 2 to move outward, and finally the tool head 2 can automatically move outward a certain distance, thereby making it convenient for the user to remove the tool head 2 from the fuselage 1. The diameter of the spring of the utility model will be increased, so that the push of the push spring 38 will be stronger, ensuring that the tool head 2 can move outward a certain distance.

[0060] Preferably, the body 1 is further provided with a drive motor 42 and a control button 43 for controlling the operation of the drive motor 42, the drive motor 42 is provided with a power output shaft 44, the power output shaft 44 is located in the connection end 3, the tool head 2 is provided with a power transmission shaft 45 and a drive assembly 46 connected to the power transmission shaft 45, a connection hole 47 is provided on the connection portion 4, the power transmission shaft 45 is arranged in the connection hole 47, the inner wall of the connection hole 47 is provided with a bearing groove 48, the power transmission shaft 45 is sleeved with a bearing 49, and the bearing 49 The power transmission shaft 45 is provided with a linkage hole 50, and after the connecting portion 4 is inserted into the connecting end 3, the power output shaft 44 is inserted into the linkage hole 50 of the power transmission shaft 45; when the user inserts the connecting portion 4 of the tool head 2 into the connecting end 3 of the fuselage 1, the power output shaft 44 in the connecting end 3 will enter the linkage hole 50 of the power transmission shaft 45 and be fixedly connected with the power transmission shaft 45. At this time, the user can control the operation of the drive motor 42 by pressing the control button 43, so that the drive motor 42 can smoothly drive the power transmission shaft 45. The power output shaft 44 rotates, and the power transmission shaft 45 rotates synchronously with the power output shaft 44. After the power output shaft 44 rotates, it drives the driving assembly 46 to operate, so that the tool head 2 can work smoothly. The setting of the connecting hole 47 on the connecting part 4 enables the power transmission shaft 45 to be smoothly connected to the power output shaft 44 in the fuselage 1, making the connection between the power transmission shaft 45 and the power output shaft 44 more stable and firm, increasing the transmission efficiency, and the bearing 49 sleeved on the power transmission shaft 45 can reduce the friction generated when the power transmission shaft 45 rotates, which can reduce the power The wear of the transmission shaft 45 increases the service life of the power transmission shaft 45, and the bearing 49 is installed in the bearing groove 48 on the inner wall of the connecting hole 47, which can limit the arbitrary movement of the bearing 49 in the connecting hole 47, ensuring that the power transmission shaft 45 can rotate normally. The power transmission shaft 45 is integrally formed, which makes the overall strength of the power transmission shaft 45 higher and not easy to be damaged. During assembly, workers only need to put the bearing 49 on the power transmission shaft 45 and then install the bearing 49 into the bearing groove 48 to complete the installation of the power transmission shaft 45. The operation is simple, fast and convenient.

[0061] Preferably, a toggle groove 51 is provided on the body 1, and the toggle portion 12 passes through the toggle groove 51 and is exposed outside the body 1; the setting of the toggle groove 51 on the body 1 enables the toggle portion 12 on the locking ring 5 to pass through the toggle groove 51 smoothly and be exposed outside the body 1, and the user can smoothly toggle the toggle portion 12 to move along the toggle groove 51, so that the tool head 2 can be smoothly installed on the body 1 or removed from the body 1.

[0062] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tool head locking structure for an electric tool, comprising a body (1), a tool head (2) detachably mounted on the body (1), and a locking mechanism disposed between the body (1) and the tool head (2), characterized in that: The body (1) is provided with a connecting end (3), the tool head (2) is provided with a connecting portion (4) on a side facing the connecting end (3), the connecting portion (4) is arranged in the connecting end (3), the locking mechanism comprises a locking ring (5) arranged in the connecting end (3), a plurality of first locking buckles (6) and a first locking block (7) are arranged on the locking ring (5), a plurality of second locking blocks (8) and a second locking buckle (9) which match the plurality of first locking buckles (6) and the first locking block (7) are respectively arranged on the connecting portion (4), a first locking groove (10) and a second locking groove (11) are respectively provided on the first locking buckle (6) and the second locking buckle (9), the locking mechanism comprises a locking ring (5) arranged in the connecting end (3), a plurality of first locking buckles (6) and a first locking block (7) are arranged on the locking ring (5), a plurality of second locking blocks (8) and a second locking buckle (9) which match the plurality of first locking buckles (6) and the first locking block (7) are respectively provided on the first locking buckle (6) and the second locking buckle (9), The ring (5) is provided with a toggle portion (12) exposed outside the machine body (1). When the toggle portion (12) is driven, the locking ring (5) can be driven to rotate. At this time, the first locking block (7) and the second locking block (8) can be respectively inserted into the second locking groove (11) and the first locking groove (10) and respectively engaged with the second locking buckle (9) and the first locking buckle (6), thereby putting the tool head (2) and the machine body (1) into a locked state. When the toggle portion (12) is driven to rotate in the opposite direction, the first locking block (7) and the second locking block (8) are respectively disengaged from the second locking groove (11) and the first locking groove (10), thereby releasing the locked state between the tool head (2) and the machine body (1).

2. The tool head locking structure of a power tool according to claim 1, characterized in that: The first locking buckle (6) includes an integrally formed first connecting plate (13) and a first snap-on portion (14), the first snap-on portion (14) is in an "L" shape and is transversely arranged at the top end of the first connecting plate (13), the first locking block (7) is located on one side of the first connecting plate (13) and is integrally formed with the first connecting plate (13), the second locking buckle (9) includes an integrally formed second connecting plate (15) and a second snap-on portion (16), the second snap-on portion (16) is in an "L" shape and is transversely arranged at the top end of the second connecting plate (15), the second locking block (8) is located on one side of the second connecting plate (15) and is integrally formed with the second connecting plate (15).

3. The tool head locking structure of a power tool according to claim 2, characterized in that: A reinforcing rib (17) is provided on the rear side of the first connecting plate (13).

4. The tool head locking structure of a power tool according to claim 1, characterized in that: A first mounting groove (18) is provided in the body (1), the first mounting groove (18) is located at the rear side of the locking ring (5), and the first mounting groove (18) is provided with an opening on a side facing the locking ring (5). A main damping block (19) is movably provided in the first mounting groove (18), the front end of the main damping block (19) passes through the opening and is exposed outside the first mounting groove (18), the front end of the main damping block (19) is provided with a main damping protrusion (20), the back side of the locking ring (5) is provided with an upper damping groove (21) and a lower damping groove (22), the main damping protrusion (20) can be inserted into the upper damping groove (21) or the lower damping groove (22) to abut against the locking ring (5), and a main damping spring (23) is further provided in the first mounting groove (18), the two ends of the main damping spring (23) respectively abut against the inner wall of the first mounting groove (18) and the rear end of the main damping block (19).

5. The tool head locking structure of a power tool according to claim 4, characterized in that: The fuselage (1) is further provided with a second mounting groove (24), the second mounting groove (24) being located on the right side of the locking ring (5), and the second mounting groove (24) is provided with an opening on a side facing the locking ring (5), a secondary damping block (25) is movably provided in the second mounting groove (24), the front end of the secondary damping block (25) passing through the opening and exposed outside the second mounting groove (24), a secondary damping protrusion (26) is provided at the front end of the secondary damping block (25), an upper damping notch (27) and a lower damping notch (28) are provided on the side surface of the locking ring (5), the secondary damping protrusion (26) can be inserted into the upper damping notch (27) or the lower damping notch (28) and connected with the locking ring (5), and a secondary damping spring (29) is further provided in the second mounting groove (24), the two ends of the secondary damping spring (29) respectively abutting against the inner wall of the second mounting groove (24) and the rear end of the secondary damping block (25).

6. The tool head locking structure of a power tool according to claim 5, characterized in that: The rear ends of the main damping block (19) and the auxiliary damping block (25) are both provided with limiting grooves (30), and the main damping spring (23) and the auxiliary damping spring (29) are respectively arranged in the limiting grooves (30) of the main damping block (19) and the auxiliary damping block (25).

7. A tool head locking structure for an electric tool according to any one of claims 5-6, characterized in that: Both inner walls of the first mounting groove (18) and the second mounting groove (24) are symmetrically provided with abutment portions (31), and both sides of the main damping block (19) and the auxiliary damping block (25) are provided with clamping portions (32), and the clamping portions (32) are arranged between the symmetrical abutment portions (31).

8. The tool head locking structure of a power tool according to any one of claims 1 to 6, characterized in that: A sliding groove (33) is provided in the body (1), a push plate (34) is slidably provided in the sliding groove (33), a mounting groove (35) is provided on the push plate (34), a first limiting column (36) and a second limiting column (37) are provided in the mounting groove (35), a push spring (38) is provided in the mounting groove (35), a front end of the push spring (38) is sleeved on the first limiting column (36), and a rear end of the push spring (38) is sleeved on the second limiting column (37), both sides of the inner wall of the sliding groove (33) are provided with a limiting portion (39), a top end of the limiting portion (39) is provided with a limiting protrusion (40), the front end of the push spring (38) is in contact with the limiting plate and the limiting protrusion (40), and a connecting block (41) is further provided on the tool head (2), and the connecting block (41) can be inserted into the sliding groove (33).

9. The tool head locking structure of a power tool according to any one of claims 1 to 6, characterized in that: The body (1) is further provided with a driving motor (42) and a control button (43) for controlling the operation of the driving motor (42). The driving motor (42) is provided with a power output shaft (44), and the power output shaft (44) is located in the connecting end (3). The tool head (2) is provided with a power transmission shaft (45) and a driving assembly (46) connected to the power transmission shaft (45). The connecting portion (4) is provided with a connecting hole (47), and the power transmission shaft (45) is arranged in the connecting hole (47). The inner wall of the connecting hole (47) is provided with a bearing groove (48). The power transmission shaft (45) is provided with a bearing (49), and the bearing (49) is arranged in the bearing groove (48). The power transmission shaft (45) is provided with a linkage hole (50). After the connecting portion (4) is inserted into the connecting end (3), the power output shaft (44) is inserted into the linkage hole (50) of the power transmission shaft (45).

10. The tool head locking structure of a power tool according to any one of claims 1 to 6, characterized in that: The body (1) is provided with a toggle groove (51), and the toggle portion (12) passes through the toggle groove (51) and is exposed outside the body (1).

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