A power tool

Abstract

The application provides an electric tool, which comprises an upper shell and a base, the upper shell is provided with a locking part, the locking part comprises an intermediate piece and a locking block, the locking block is arranged at least one end of the intermediate piece; the base is provided with a locking matching part, the base is further provided with a wire passing part in communication with the locking matching part, the wire passing part is used for passing a power supply line; when the power supply is turned on, the electric tool has a first state, in the first state, the intermediate piece is stretched, and the locking block and the locking matching part are matched; when the power supply is turned off, the electric tool has a second state, in the second state, the intermediate piece is reset, and the locking block and the locking matching part are disengaged; the upper shell rotates relative to the locking block with the locking block as the axis. The application solves the problem that the electric tool is prone to misstart when the shell is disassembled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to an electric tool. BACKGROUND

[0002] The use of electric tools makes people's life more convenient. In actual use, the replacement of parts on the electric tool is inevitable. Taking an electric circular saw as an example, the saw blade of the electric circular saw will be worn out and sharpness will decrease or will not be suitable for cutting certain materials during actual use. At this time, the saw blade needs to be replaced to continue cutting work. However, most users are likely to forget to disconnect the power supply when disassembling the upper shell, and the electric tool is likely to be mistakenly started when disassembling the shell. SUMMARY

[0003] The problem solved by the present application is that the electric tool is likely to be mistakenly started when disassembling the shell.

[0004] To solve the above problem, the present application provides an electric tool, comprising an upper shell and a base, the upper shell is provided with a locking portion, the locking portion comprises an intermediate piece and a locking block, the locking block is arranged at least one end of the intermediate piece; the base is provided with a locking matching portion, the base is further provided with a wire routing portion in communication with the locking matching portion, the wire routing portion is used for passing the power supply line; the electric tool has a first state when the power supply is connected, in the first state, the intermediate piece is stretched, and the locking block and the locking matching portion are matched; the electric tool has a second state when the power supply is disconnected, in the second state, the intermediate piece is reset, and the locking block and the locking matching portion are disengaged; the upper shell rotates relative to the locking block with the locking block as the axis.

[0005] Compared with the prior art, the technical effects achieved by the present technical solution are that the locking portion and the locking matching portion are used to realize the locking and unlocking of the upper shell relative to the base, the reset of the locking block is realized by the intermediate piece which can automatically contract after being stretched, and the wire routing portion is provided to enable the wire to pass through and be connected to the locking matching portion, so that the locking matching portion is in the first state when the whole electric tool is connected to the power supply, at this time, the upper shell and the base are locked, and the second state enables the upper shell to be disassembled only in the power-off state, thereby preventing the tool from being mistakenly started when disassembled under power.

[0006] Further, the upper shell is provided with a mounting portion, the mounting portion is provided with a mounting position, the axis of the mounting position coincides with the axis of the mounting portion; the locking block and the intermediate piece are both arranged in the mounting position.

[0007] Compared with the prior art, the technical effects achieved by the present technical solution are that the coaxial assembly of the locking portion and the mounting portion is realized, the stress is uniform when the intermediate piece stretches and the locking block matches, the mounting position can limit the axial movement of the locking block, the locking is stuck or the matching fails due to eccentricity is avoided, the locking block is wholly contracted in the mounting position in the second state, and the user can smoothly disassemble the upper shell.

[0008] Further, the mounting position is provided with a limiting part, the limiting part is arranged along the circumferential direction of the inner wall of the mounting position, the limiting part extends along the axial direction of the mounting position, and the limiting part is provided with a first guide surface; the locking block is provided with a second guide surface matched with the first guide surface.

[0009] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the limiting part is arranged along the circumferential direction of the mounting position, the extension stroke of the locking block can be accurately limited, it is ensured that the locking block can be partially matched with the mounting position and the other part is matched with the locking matching part in the first state, and it is ensured that the intermediate part will not be excessively contracted in the second state. The cooperation of the first guide surface and the second guide surface plays a guiding role, can guide the accurate positioning of the locking block during the contraction process, and can play a buffering role when the locking block is contracted in place.

[0010] Further, the locking matching part comprises a mounting part and a matching part, the mounting part is connected with the base, and the matching part is arranged in parallel with the axis of the mounting part, and the matching part is provided with an attracting part perpendicular to the axis of the mounting part at both ends.

[0011] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the mounting part realizes the stable connection of the locking matching part and the base, avoids the loosening of the locking matching part due to vibration during the operation of the electric tool, the matching part is arranged in parallel with the axis of the mounting part, so that the locking block can be accurately docked with the matching part during the extension and contraction of the locking block, and the matching deviation is avoided. The attracting part perpendicular to the axis of the mounting part is arranged at both ends of the matching part, and the locking block and the matching part can be matched through the adsorption force in the first state.

[0012] Further, the matching part is provided with a matching position, the locking block is matched with the matching position when the electric tool is in the first state, and the axis of the matching position coincides with the axis of the mounting position.

[0013] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the matching position and the mounting position are coaxially arranged, the locking block can be smoothly inserted into the matching position under the attraction of the attracting part, the cooperation of the locking part and the locking matching part is realized, and the locking of the upper shell and the base is realized.

[0014] Further, the attracting part is provided with an electromagnet, the electromagnet is communicated with the matching position, and the electromagnet attracts the locking block when the electric tool is in the first state.

[0015] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the electromagnet is fixedly arranged on the locking matching part through the attracting part, the position of the electromagnet will not be shifted due to the vibration during the use of the electric tool, it is ensured that the electromagnet can effectively attract the locking block, the electromagnetic adsorption has the characteristics of rapid response, can realize synchronous switching with the power on-off, ensures that the electromagnet is quickly adsorbed and locked in the first state, is immediately released and unlocked in the second state, and eliminates the safety hidden danger of unlocking the shell in the live state.

[0016] Further, the mounting portion is provided with a limiting protrusion on the side close to the suction member, and the fitting member is provided with a limiting groove on the side close to the mounting portion, or the mounting portion is provided with a limiting groove on the side close to the fitting member, and the fitting member is provided with a limiting protrusion on the side close to the mounting portion; the limiting protrusion and the limiting groove are matched, and the limiting groove is arranged in the circumferential direction of the mounting portion.

[0017] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the matching of the limiting protrusion and the limiting groove can assist the rotation of the upper shell relative to the base, and even if the locking portion and the locking fitting portion are disengaged in the second state, the upper shell will not immediately fall off the base, and can play a role in preliminary positioning when the user installs the upper shell again.

[0018] Further, the electric tool further comprises an angle adjusting portion, and the angle adjusting portion comprises: an angle disc, which is arranged on the base and is provided with an adjusting groove arranged along the edge of the angle disc; and an adjusting piece, which is matched with the adjusting groove and is connected with the upper shell.

[0019] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the angle adjusting portion realizes multi-angle adjustment of the upper shell relative to the base through the matching of the adjusting piece and the adjusting groove on the angle disc, so that the electric tool can flexibly adjust the working angle according to the use scene, and the operation adaptability and use comfort are improved.

[0020] Further, the electric tool further comprises a power portion, and the power portion comprises a gear box and a handle, the handle is connected with the gear box, and the handle is provided with a power supply interface; the gear box is connected with the base, and the gear box comprises an output shaft.

[0021] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the handle and the gear box are designed integrally, and the power supply interface is arranged on the handle, so that the operation holding and the power supply connection layout are more reasonable, the ergonomic design is met, the comfort degree of long-time operation is improved, the arrangement distance of the power supply line is shortened, the line exposure and winding risk are reduced, and the use safety is improved. The gear box is stably connected with the base, the installation precision and transmission stability of the output shaft are ensured, and the vibration offset of the output shaft during work is avoided.

[0022] Further, the electric tool further comprises a cutting member, the cutting member is connected with the output shaft, and the cutting member rotates around the output shaft as the axis; the upper shell is provided with a containing groove capable of containing the cutting member.

[0023] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: on the one hand, the containing groove is used for protecting the cutting member, so that the cutting member is not affected by external collision during work, and on the other hand, the containing groove can also block the material slag splashed during cutting of the cutting member. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1One of the overall views of the electric tool provided by the present application;

[0025] Figure 2 For Figure 1 The partial enlarged view of the middle A part;

[0026] Figure 3 The second overall view of the electric tool;

[0027] Figure 4 For Figure 3 The partial enlarged view of the middle B part;

[0028] Figure 5 The schematic view of the structure of the locking part in the mounting part;

[0029] Figure 6 The third overall view of the electric tool;

[0030] Figure 7 For Figure 6 The partial enlarged view of the middle C part.

[0031] Explanation of reference signs:

[0032] 100 - upper shell; 110 - locking part; 111 - intermediate piece; 112 - locking block; 120 - mounting part; 121 - mounting position; 122 - limiting part; 123 - first guide surface; 200 - base; 210 - locking matching part; 211 - mounting piece; 212 - matching piece; 213 - matching position; 214 - suction piece; 215 - electromagnet; 220 - limiting convex part; 221 - limiting concave groove; 300 - angle disc; 310 - adjusting groove; 400 - handle; 410 - gear box; 411 - power supply interface; 420 - cutting piece. DETAILED DESCRIPTION

[0033] The present application aims to provide an electric tool, which can realize the effect that the shell cannot be disassembled when the electric tool is connected to the power supply.

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0035] See Figures 1 to 7The electric tool comprises an upper shell 100 and a base 200, the upper shell 100 is provided with a locking portion 110, the locking portion 110 comprises an intermediate piece 111 and a locking block 112, the locking block 112 is arranged at least one end of the intermediate piece 111; the base 200 is provided with a locking matching portion 210, and the base 200 is further provided with a wire passing portion in communication with the locking matching portion 210, the wire passing portion is used for passing a power supply line; when the power supply is turned on, the electric tool has a first state, in the first state, the intermediate piece 111 is stretched, and the locking block 112 and the locking matching portion 210 are matched; when the power supply is turned off, the electric tool has a second state, in the second state, the intermediate piece 111 is reset, and the locking block 112 and the locking matching portion 210 are disengaged; the upper shell 100 rotates relative to the locking block 112 with the locking block 112 as the axis.

[0036] Specifically, the intermediate piece 111 is a spring, and the locking block 112 is a cylindrical component made of metal, both ends of the intermediate piece 111 are provided with the locking block 112 in the embodiment, and the purpose is to realize bilateral locking of the locking block 112 and the locking matching portion 210, so that the upper shell 100 can be more stably locked on the base 200, and meanwhile, it is also convenient to support the upper shell 100 to rotate with the locking block 112 as the axis.

[0037] The locking portion 110 and the locking matching portion 210 are used for realizing locking and unlocking of the upper shell 100 relative to the base 200, the reset of the locking block 112 needs to be realized through the intermediate piece 111 which can automatically shrink after being stretched, the wire passing portion is arranged so that the wire can pass through and be connected to the locking matching portion 210, so that the locking matching portion 210 is in the first state when the whole electric tool is connected to the power supply, at this time, the upper shell 100 and the base 200 are locked, and the second state makes the upper shell 100 only be able to be disassembled in the power-off state, thereby preventing the tool from being mistakenly started when being disassembled under the electrified state.

[0038] Referring to Figure 3 and Figure 4 and Figure 5 The upper shell 100 is provided with a mounting portion 120, the mounting portion 120 is provided with a mounting position 121, the axis of the mounting position 121 coincides with the axis of the mounting portion 120; the locking block 112 and the intermediate piece 111 are both arranged in the mounting position 121.

[0039] Specifically, the upper shell 100 is in the shape of an arc-shaped shell, the mounting portion 120 is specifically a cylindrical structure, the mounting portion 120 and the upper shell 100 are integrally formed, and the mounting position 121 is specifically a through hole.

[0040] The coaxial assembly of the locking part 110 and the mounting part 120 ensures that the intermediate piece 111 is uniformly stressed when being stretched and contracted, and the mounting position 121 can limit the axial movement of the locking block 112, avoiding the locking block 112 from being locked or the cooperation from being invalid due to eccentricity. In the second state, the locking block 112 is entirely retracted in the mounting position 121, facilitating the user to smoothly disassemble the upper shell 100.

[0041] Referring to Figure 5 The mounting position 121 is provided with a limiting part 122, which is circumferentially arranged along the inner wall of the mounting position 121 and axially extends along the mounting position. The limiting part 122 is provided with a first guide surface 123. The locking block 112 is provided with a second guide surface matched with the first guide surface 123.

[0042] The limiting part 122 is further provided with a through hole for the intermediate piece 111 to pass through. The diameter of the through hole is 1 to 1.5 times the diameter of the intermediate piece 111, and the diameter of the through hole is close to the diameter of the intermediate piece 111, which can provide support for the intermediate piece 111 and prevent the intermediate piece 111 from deforming. The first guide surface 123 is inclined away from the locking and cooperating part 210. The first guide surface 123 is circumferentially arranged on the limiting part 122, and the first guide surface 123 is arranged at both ends of the limiting part 122. The second guide surface is arranged on the locking block 112 close to the intermediate piece 111. The second guide surface is inclined towards the side close to the intermediate piece 111, and the second guide surface is circumferentially arranged on the locking block 112.

[0043] The limiting part 122 is circumferentially arranged along the mounting position 121, which can accurately limit the stretching and contracting stroke of the locking block 112, ensuring that the locking block 112 can be partially matched with the mounting position 121 and the other part can be matched with the locking and cooperating part 210 in the first state, and ensuring that the intermediate piece 111 will not be excessively retracted in the second state. The cooperation of the first guide surface 123 and the second guide surface plays a guiding role, which can guide the accurate positioning of the locking block 112 during the retraction process, and can play a buffering role when the locking block 112 is retracted in place.

[0044] The locking and cooperating part 210 includes a mounting piece 211 and a cooperating piece 212. The mounting piece 211 is connected with the base 200. The cooperating piece 212 is arranged in parallel with the axis of the mounting part 120, and the two ends of the cooperating piece 212 are provided with suction pieces 214 perpendicular to the axis of the mounting part 120.

[0045] The two ends of the cooperating piece 212 are bent towards the mounting part 120 and are perpendicular to the axis of the mounting part 120. The cooperating piece 212 and the mounting piece 211 are integrally formed, and the mounting piece 211 is connected with the base 200 by screws.

[0046] The mounting piece 211 realizes the stable connection of the locking fitting part 210 and the base 200, avoids the loosening of the locking fitting part 210 due to the vibration when the electric tool works, and the fitting piece 212 is arranged in parallel with the axis of the mounting part 120, so that the locking block 112 can be accurately docked with the fitting piece 212 when the locking block 112 is extended or retracted, and the fitting deviation is avoided. The fitting piece 212 is provided with suction pieces 214 perpendicular to the axis of the mounting part 120 at both ends, and in the first state, the locking block 112 and the fitting piece 212 can be attracted by the adsorption force.

[0047] Referring to Figure 6 and Figure 7 , the fitting piece 212 is provided with a fitting position 213, and when the electric tool is in the first state, the locking block 112 is fitted with the fitting position 213; the axis of the fitting position 213 coincides with the axis of the mounting position 121.

[0048] The fitting position 213 is a through hole, and the fitting position 213 is specifically arranged at the two ends of the fitting piece 212 which are bent.

[0049] The fitting position 213 and the mounting position 121 are coaxially arranged, which can ensure that the locking block 112 can be smoothly inserted into the fitting position 213 under the attraction of the suction piece 214, realize the cooperation of the locking part 110 and the locking fitting part 210, and thus realize the locking of the upper shell 100 and the base 200.

[0050] The suction piece 214 is provided with an electromagnet 215, and the electromagnet 215 is in communication with the fitting position 213; when the electric tool is in the first state, the electromagnet 215 attracts the locking block 112.

[0051] The suction piece 214 further includes a shell, the shell is connected with the fitting piece 212, the shell wraps the electromagnet 215, prevents the electromagnet 215 from being impacted from outside or being rusted by water vapor, and provides a stable working environment for the electromagnet 215.

[0052] The electromagnet 215 is fixedly arranged on the locking fitting part 210 through the suction piece 214, so that the position of the electromagnet 215 will not be displaced due to the vibration when the electric tool is used, and the electromagnet 215 can effectively attract the locking block 112. The electromagnetic adsorption has the characteristics of rapid response, can be synchronized with the power on-off to realize synchronous switching, ensures that the locking is quickly adsorbed in the first state and the unlocking is immediately released in the second state, and eliminates the safety hidden danger of unlocking the shell in the live state.

[0053] Referring to Figure 3 and Figure 4 and Figure 6 and Figure 7The mounting portion 120 is provided with a limiting protrusion 220 on the side close to the suction member 214, and the cooperating member 212 is provided with a limiting groove 221 on the side close to the mounting portion 120, or the mounting portion 120 is provided with a limiting groove 221 on the side close to the suction member 214, and the cooperating member 212 is provided with a limiting protrusion 220 on the side close to the mounting portion 120; the limiting protrusion 220 and the limiting groove 221 are matched, and the limiting groove 221 is arranged in the circumferential direction of the mounting portion 120.

[0054] In the embodiment, the limiting protrusion 220 is arranged on the mounting portion 120, and the limiting groove 221 is arranged on the cooperating member 212.

[0055] The cooperation of the limiting protrusion 220 and the limiting groove 221 can assist the rotation of the upper shell 100 relative to the base 200, and even if the locking portion 110 and the locking cooperating portion 210 are disengaged in the second state, the upper shell 100 will not immediately fall off the base 200, and can play a role in preliminary positioning when the user installs the upper shell 100 again.

[0056] The power tool further comprises an angle adjusting portion, which comprises: an angle disc 300 arranged on the base 200, the angle disc 300 being provided with an adjusting groove 310 arranged along the edge of the angle disc 300; and an adjusting member cooperating with the adjusting groove 310 and connected with the upper shell 100.

[0057] The angle adjusting portion further comprises a second angle disc arranged on the base 200 close to the locking cooperating portion 210, the second angle disc being fixedly connected with the mounting member 211, and there is a second adjusting member cooperating with the second angle disc, and the second adjusting member is rotated about the screw connected with the mounting member 211 by loosening the second adjusting member, so as to realize the angle adjustment of the locking cooperating portion 210.

[0058] The angle adjusting portion realizes the multi-angle adjustment of the upper shell 100 relative to the base 200 through the cooperation of the adjusting member and the adjusting groove 310 on the angle disc 300, so that the power tool can flexibly adjust the working angle according to the use scene, and the operation adaptability and use comfort are improved.

[0059] The power tool further comprises a power portion, which comprises a gear box 410 and a handle 400, the handle 400 being connected with the gear box 410, and the handle 400 being provided with a power supply interface 411; the gear box 410 is connected with the base 200, and the gear box 410 comprises an output shaft.

[0060] The handle 400 is integrally designed with the gear box 410, and the power supply interface 411 is arranged on the handle 400, so that the operation holding and the power supply connection layout are more reasonable, the ergonomic design is met, the comfort degree of long-time operation is improved, the arrangement distance of the power supply line is shortened, the line exposure and winding risk are reduced, and the use safety is improved. The gear box 410 is stably connected with the base 200, the mounting precision and the transmission stability of the output shaft are ensured, and the vibration offset of the output shaft during work is avoided.

[0061] The electric tool further comprises a cutting piece 420 connected with the output shaft, and the cutting piece 420 rotates around the output shaft; the upper shell 100 is provided with a containing groove capable of containing the cutting piece 420.

[0062] The cutting piece 420 is specifically a circular saw blade, and the cutting piece 420 is further provided with a mounting hole through which the output shaft passes; a clamping piece is arranged on the side of the cutting piece 420 away from the output shaft, the clamping piece is fixedly connected with the output shaft, the output shaft is provided with a rotating table rotating synchronously with the shaft, and the clamping piece and the rotating table clamp the cutting piece 420, so that the cutting piece 420 can rotate around the output shaft to cut.

[0063] In the embodiment, the electric tool further comprises a lower shell, the lower shell rotates around the output shaft, and the lower shell is provided with a shell groove on the side away from the clamping piece of the rotating table; the lower shell is rotatably connected with the shell groove through a bearing.

[0064] The lower shell is provided with a second containing groove on the side close to the cutting piece 420, so that the lower shell and the upper shell 100 can wrap the edge of the cutting piece 420 when the electric tool is not used, and the user is prevented from being cut; the lower shell is further provided with a handle on the side close to the clamping piece, so that the user can rotate the lower shell to expose the cutting piece 420 before use.

[0065] The containing groove is used for protecting the cutting piece 420, preventing the cutting piece 420 from being affected by external collision during work, and blocking the material slag splashed by the cutting piece 420 during cutting.

[0066] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A power tool characterized by comprising: include: The upper housing has a locking part, which includes an intermediate member and a locking block, with the locking block disposed at at least one end of the intermediate member; The base has a locking engagement part and a wiring part that communicates with the locking engagement part, the wiring part being used to allow power lines to pass through; When the power is turned on, the power tool has a first state. In the first state, the intermediate part is stretched, and the locking block and the locking engagement part are engaged. When the power is disconnected, the power tool has a second state. In the second state, the intermediate component is reset, and the locking block and the locking engagement part are disengaged. The upper housing rotates relative to the locking block about the locking block as an axis.

2. The power tool of claim 1, wherein, The upper housing is provided with a mounting part, and the mounting part is provided with a mounting position, the axis of the mounting position coincides with the axis of the mounting part; Both the locking block and the intermediate component are located within the mounting position.

3. The power tool according to claim 2, characterized in that, The mounting position is provided with a limiting part, which is arranged circumferentially along the inner wall of the mounting position and extends axially along the mounting position. The limiting part is provided with a first guide surface. The locking block is provided with a second guide surface that mates with the first guide surface.

4. The power tool according to claim 3, characterized in that, The locking mating part includes a mounting part and a mating part, and the mounting part is connected to the base; The mating component is arranged parallel to the axis of the mounting part, and the mating component has suction components at both ends that are perpendicular to the axis of the mounting part.

5. The power tool according to claim 4, characterized in that, The mating component is provided with a mating position. When the power tool is in the first state, the locking block engages with the mating position. The axis of the mating position coincides with the axis of the mounting position.

6. The power tool according to claim 5, characterized in that, The attracting element is equipped with an electromagnet, which is connected to the mating position; When the power tool is in the first state, the electromagnet attracts the locking block.

7. The power tool according to claim 6, characterized in that, The mounting part has a limiting protrusion on the side near the suction member, and the suction member has a limiting groove on the side near the mounting part; or, the mounting part has the limiting groove on the side near the suction member, and the suction member has the limiting protrusion on the side near the mounting part. The limiting protrusion and the limiting groove cooperate, and the limiting groove is arranged circumferentially along the mounting part.

8. The power tool according to any one of claims 1 to 7, characterized in that, The power tool further includes an angle adjustment unit, the angle adjustment unit comprising: An angle plate, which is disposed on the base, has an adjustment groove on it, which is provided along the edge of the angle plate; An adjusting component that mates with the adjusting groove and is connected to the upper housing.

9. The power tool according to claim 8, characterized in that, The power tool also includes a power unit, which includes a gearbox and a handle. The handle is connected to the gearbox and has a power interface. The gearbox is connected to the base, and the gearbox includes an output shaft.

10. The power tool according to claim 9, characterized in that, The power tool also includes a cutting component, which is connected to the output shaft and rotates about the output shaft. The upper housing is provided with a receiving groove capable of accommodating the cut piece.

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