Anti-short-circuit angle grinder switch

Abstract

The application discloses an anti-short-circuit angle grinder switch. The angle grinder switch comprises a base body, a wiring part group arranged on the base body, a containing groove group arranged on the wiring part group, a wiring hole group arranged on the side wall of the containing groove group and communicated with the containing groove group, and a wiring unit group arranged in the containing groove group. The wiring part group is provided with a protection cover group connected with the wiring part group, and the protection cover group seals the opening of the containing groove group. The anti-short-circuit angle grinder switch can improve the production efficiency and effectively avoid the short circuit of the angle grinder due to the accumulation of metal dust between two poles during use.

Description

Technical Field

[0001] This invention relates to the field of switch technology, and more specifically to an angle grinder switch that is protected against short circuits. Background Technology

[0002] An angle grinder is a handheld power tool that uses a grinding wheel for cutting and polishing. It is the most commonly used power tool for cutting, grinding, and brushing metals and stones.

[0003] The short distance between the two power terminals of a conventional angle grinder switch allows metal dust generated during grinding to adhere to the terminals and screws. As this dust accumulates, the risk of a short circuit increases, potentially causing the circuit breaker to trip or even catch fire, severely endangering the user's safety. Currently, some power tool manufacturers use adhesive to prevent dust accumulation at the terminals; however, this requires curing, resulting in low production efficiency. Furthermore, subsequent repairs require removing the old adhesive and reapplying it, increasing maintenance costs.

[0004] The aforementioned technical problem is a shortcoming that the entire power tool industry cannot effectively solve for the time being. Therefore, it is imperative to develop a short-circuit resistant angle grinder switch. This invention can fill the domestic technological gap, while not significantly increasing the cost and facilitating maintenance. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a short-circuit-proof angle grinder switch, so as to improve production efficiency and effectively avoid short circuits in the angle grinder during use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides an angle grinder switch including a base body, a wiring part assembly provided on the base body, a receiving groove assembly provided on the wiring part assembly, a wiring hole assembly communicating with the receiving groove assembly provided on the side wall of the receiving groove assembly, and a wiring unit assembly provided inside the receiving groove assembly. The wiring assembly is provided with a protective cover assembly connected to the wiring assembly, and the protective cover assembly closes the opening of the receiving groove assembly.

[0007] As a further improvement of the present invention, the top and bottom of the wiring assembly are provided with locking strips, and the top and bottom of the protective cover assembly are provided with locking slots. After the protective cover assembly is installed on the wiring assembly by sliding on the side, the locking strips are just locked into the locking slots to lock the protective cover assembly onto the wiring assembly.

[0008] As a further improvement of the present invention, the wiring assembly is provided with a positioning protrusion, and the protective cover assembly is provided with a positioning notch. The position of the positioning protrusion matches the position of the positioning notch. When the protective cover assembly is snapped onto the wiring assembly, the positioning protrusion is embedded in the positioning notch.

[0009] As a further improvement of the present invention, the wiring assembly is integrally formed with the base body; The top of the protective cover assembly has a first groove group corresponding to the position of the wiring hole group.

[0010] As a further improvement of the present invention, a second groove group is provided at the bottom of the protective cover group corresponding to the position of the first groove group, and the size of the second groove group corresponds to that of the first groove group.

[0011] As a further improvement of the present invention, the base body is provided with a mounting groove, and a push shaft and a push shaft spring are provided in the mounting groove. One end of the push shaft extends out of the mounting groove, and the end of the push shaft located in the mounting groove is provided with a reciprocating groove. One end of the push shaft spring is located in the reciprocating groove, and the other end of the push shaft spring abuts against the wall of the mounting groove. The push shaft has an oscillating sub-assembly assembly, and a moving contact piece assembly that cooperates with the oscillating sub-assembly assembly is provided on the side of the oscillating sub-assembly assembly away from the push shaft. A bracket assembly and a stationary contact piece assembly are provided in the mounting groove, and the bracket assembly supports the moving contact piece assembly. The moving contact assembly is provided with a moving contact group, and the stationary contact assembly is provided with a stationary contact group that cooperates with the moving contact group.

[0012] As a further improvement of the present invention, one end of the stationary contact assembly is not connected to the wiring unit.

[0013] As a further improvement of the present invention, the angle grinder switch also includes a top cover, the top cover and the base body forming a housing, and one end of the push shaft extending out of the mounting groove extending out of the housing; The outer wall of the top cover is provided with a sealing groove, and a pressure ring is provided in the sealing groove. A sealing ring is provided at one end of the push shaft that extends out of the box body. The pressure ring fixes one end of the sealing ring to the top cover.

[0014] As a further improvement of the present invention, the push shaft is provided with a slot group, and the oscillating sub-assembly group includes an oscillating sub-assembly and an oscillating sub-spring group; The top and bottom of the swing sub-assembly are provided with snap-fit ​​block assemblies, and the top and bottom walls of the snap-fit ​​slot assembly are provided with snap-fit ​​slot assemblies that cooperate with the snap-fit ​​block assemblies. A connecting groove is provided at one end of the oscillating sub-assembly away from the moving contact plate assembly. One end of the oscillating sub-spring assembly is disposed in the connecting groove assembly, and the other end of the oscillating sub-spring assembly abuts against the slot assembly.

[0015] As a further improvement of the present invention, the mounting groove group is provided with a sliding groove group, and the push shaft is provided with a slider group, the slider group being slidably connected within the sliding groove group.

[0016] As a further improvement of the present invention, the wiring unit group includes a screw group and a nut group that mates with the screw group.

[0017] The present invention provides an angle grinder switch that prevents short circuits, which can effectively prevent short circuits in the angle grinder during use while improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the short-circuit-protected angle grinder switch in this invention; Figure 2 This is an exploded view of the short-circuit protection angle grinder switch of the present invention; Figure 3 This is a three-dimensional structural diagram of the base of the short-circuit protection angle grinder switch in this invention; Figure 4 This is a three-dimensional structural diagram of the push shaft of the anti-short-circuit angle grinder switch in this invention; Figure 5 This is a three-dimensional structural diagram of the protective cover for the short-circuit-proof angle grinder switch in this invention.

[0019] In the diagram: 1-Base body, 101-Wiring part assembly, 1011-Clamping strip assembly, 102-Receiving groove assembly, 103-Wiring hole assembly, 104-Wiring unit assembly, 105-Mounting groove, 1051-Slide groove assembly, 2-Protective cover assembly, 201-Clamping groove assembly, 202-First groove assembly, 203-Second groove assembly, 3-Screw assembly, 4-Nut assembly, 5-Push shaft, 51-Clamping groove assembly, 52-Slider assembly, 6-Push shaft spring, 7-Oscillator assembly assembly, 71-Oscillator assembly, 711-Clamping block assembly, 712-Connecting groove assembly, 72-Oscillator spring assembly, 8-Moving contact piece assembly, 9-Bracket, 10-Stabilized contact piece assembly, 81-Moving contact point assembly, 1001-Stabilized contact point assembly, 11-Top cover, 1101-Sealing groove, 12-Pressure ring, 13-Sealing ring. Detailed Implementation

[0020] Reference Figures 1-5As shown, a short-circuit protection angle grinder switch according to this embodiment includes a base body 1, a wiring part group 101 is provided on the base body 1, a receiving groove group 102 is provided on the wiring part group 101, a wiring hole group 103 communicating with the receiving groove group 102 is provided on the side wall of the receiving groove group 102, and a wiring unit group 104 is provided inside the receiving groove group 102. The wiring assembly 101 is provided with a protective cover assembly 2 connected to the wiring assembly 101, and the protective cover assembly 2 closes the opening of the receiving groove assembly 102; wherein, the protective cover assembly 2 is made of insulating material.

[0021] It should be noted that the wiring unit group 104 in this embodiment can be any conventional wiring structure. This invention only describes the wiring unit as screw group 3 and nut group 4.

[0022] The short-circuit resistant angle grinder switch provided by this invention allows for easy connection of the wire to the switch. The wire is inserted into the wiring hole assembly 103, and then the screw assembly 3 is tightened to secure the wire. The screwdriver is inserted through the opening of the receiving groove assembly 102 for easy operation. After the wire is secured to the angle grinder switch, the protective cover assembly 2 is pressed against the opening of the receiving groove assembly 102 for locking. Once locked, the switch is fixed without waiting, resulting in high assembly and production efficiency.

[0023] It should be noted that because the metal dust particles generated during the use of the angle grinder are large, although there is a gap between the protective cover assembly 2 and the wiring assembly 101, the metal dust will not accumulate in the gap, nor will it get stuck inside. Therefore, the short-circuit resistant angle grinder switch in this embodiment can effectively prevent short circuits from occurring during the use of the angle grinder.

[0024] In addition, since the diameter of the wiring hole group 103 in this embodiment is close to or equal to the diameter of the wire, even if metal dust particles adhere to the wire, the metal dust particles will not cause a short circuit between the two poles because they do not directly contact the metal conductor inside the switch.

[0025] It should be noted that the wiring hole group 103 in this embodiment is segmented. The upper section has a large diameter hole that can accommodate the wire core and the wire sheath; the lower section has a small diameter hole that can only accommodate the wire core. Furthermore, an inclined guide portion is provided between the upper and lower sections of the hole to facilitate the insertion of the wire core and to create a compression deformation between the wire sheath and the guide portion, thereby improving the dustproof effect.

[0026] It should be further noted that the switch in this embodiment is used with a 2.2 core wire, the upper section of the hole has a maximum diameter of 2.8, and the lower section of the hole has a diameter of 2.2.

[0027] like Figure 3 As shown, the top and bottom of the wiring assembly 101 are provided with locking strips 1011, and the top and bottom of the protective cover assembly 2 are provided with locking slots 201. After the protective cover assembly 2 is installed on the wiring assembly 101 by sliding it sideways, the locking strips 1011 are just locked into the locking slots 201, so as to lock the protective cover assembly 2 onto the wiring assembly 101.

[0028] In this embodiment, by providing locking strips 1011 at both the top and bottom of the wiring assembly 101, and locking slots 201 at both the top and bottom of the protective cover assembly 2, after the protective cover assembly 2 is installed on the wiring assembly 101 by sliding it sideways, the locking strips 1011 are just locked into the locking slots 201. The protective cover assembly 2 is fixed to the wiring assembly 101 by the cooperation of the locking strips 1011 and the locking slots 201, so that the protective cover assembly 2 will not fall off due to vibration during use. When repairing the switch, the protective cover assembly 2 can be removed without damage by simply pushing it from the side.

[0029] Preferably, the wiring assembly 101 is provided with a positioning protrusion, and the protective cover assembly 2 is provided with a positioning notch. The position of the positioning protrusion matches the position of the positioning notch. When the protective cover assembly 2 is snapped onto the wiring assembly 101, the positioning protrusion is embedded in the positioning notch.

[0030] like Figure 3 , Figure 5 As shown, when the protective cover assembly 2 is snapped onto the wiring assembly 101, the positioning protrusion is embedded in the positioning notch, preventing the protective cover assembly 2 from loosening or falling off during the use of the power tool. This improves the stability of the tool during use and effectively prevents short circuits inside the tool for a long time. Furthermore, the positioning protrusion and positioning notch can be disassembled without damage, allowing the protective cover assembly to be reused and reducing maintenance costs.

[0031] Preferably, the wiring assembly 101 is integrally formed with the base body 1 to improve the structural strength and stability of the switch in this embodiment.

[0032] As shown in the figure, the top of the protective cover group 2 is provided with a first groove group 202 corresponding to the position of the wiring hole group 103.

[0033] In this embodiment, by setting a first groove group 202 on the top of the protective cover group 2 at a position corresponding to the wiring hole group 103, and making the setting position and size of the first groove group 202 correspond exactly to the position and size of the wiring hole group, the cable can enter the wire hole group 103 along the first groove group 202. This not only avoids the need to remove the protective cover group 2 when installing the cable, but also allows the wiring hole size in this embodiment to be made larger.

[0034] As shown in the figure, a second groove group 203 is provided at the bottom of the protective cover group 2, corresponding to the position of the first groove group 202. The size of the second groove group 203 corresponds to that of the first groove group 202.

[0035] In this embodiment, by symmetrically setting grooves on the top and bottom of the protective cover assembly 2, the protective cover assembly 2 in this embodiment is applicable to both the left and right sides (by rotating 180°), so that there is no need to identify and distinguish between the left and right protective covers during the disassembly and assembly process. This not only improves the installation efficiency, but also reduces the mold cost by requiring only one set of injection mold protective cover assembly.

[0036] like Figure 2 Figure 3 As shown, the base body 1 is provided with a mounting groove 105, and a push shaft 5 and a push shaft spring 6 are provided in the mounting groove 105. One end of the push shaft 5 extends out of the mounting groove 105, and a reciprocating groove is provided at one end of the push shaft 5 in the mounting groove 105. One end of the push shaft spring 6 is provided in the reciprocating groove, and the other end of the push shaft spring 6 abuts against the wall of the mounting groove 105. The push shaft 5 has a swing sub-assembly group 7. On the side of the swing sub-assembly group 7 away from the push shaft 5, a moving contact piece group 8 that cooperates with the swing sub-assembly group 7 is provided. The mounting groove 105 is provided with a bracket group 9 and a stationary contact piece group 10. The bracket group 9 supports the moving contact piece group 8. The moving contact assembly 8 is provided with a moving contact group 81, and the stationary contact assembly 10 is provided with a stationary contact group 1001 that cooperates with the moving contact group 81.

[0037] In this embodiment, when using the switch, pressing the push shaft 5 moves it towards the base 1. During this process, the push shaft spring 6 is continuously compressed until the contact position between the oscillating sub-assembly 7 and the moving contact group 8 moves to the other side of the rotational position of the moving contact group 8. The oscillating sub-assembly 7 drives the moving contact group 8 to rotate rapidly, causing the moving contact group 81 to connect with the stationary contact group 1001, and the switch is turned on. After releasing the push shaft 5, the push shaft spring 6 returns to its original position, causing the push shaft 5 to move away from the base 1 until the contact position between the oscillating sub-assembly 7 and the moving contact group 8 moves to the other side of the rotational position of the moving contact group 8. The oscillating sub-assembly 7 drives the moving contact group 8 to rotate rapidly, causing the moving contact group 81 to separate from the stationary contact group 1001, and the switch is turned off.

[0038] like Figure 2 As shown, one end of the stationary contact assembly 10 that is not provided with the stationary contact point assembly 1001 is connected to the wiring unit 104.

[0039] like Figure 1 and Figure 2 As shown, the angle grinder switch also includes an upper cover 11, which together with the base body 1 forms a housing, and one end of the push shaft 5 extending out of the mounting groove 105 extends out of the housing; The outer wall of the upper cover 11 is provided with a sealing groove 1101, and a pressure ring 12 is provided in the sealing groove 1101. A sealing ring 13 is provided at one end of the push shaft 5 that extends out of the box body. The pressure ring 12 fixes one end of the sealing ring 13 to the upper cover 11.

[0040] In this embodiment, the pressure ring 12 and the upper cover 11 are fixed by ultrasonic welding, and the sealing ring 13 is fixed in the sealing groove 1101 on the upper cover 11. After the upper cover 11 is fixed to the base, the sealing ring 13 is pressed so that the end of the push shaft 5 extends out from the through hole of the sealing ring 13, thus completing the assembly.

[0041] It should be noted that in this embodiment, the upper cover 11 and the base body 1 can be fixed by snap-fit ​​or by ultrasonic welding.

[0042] As shown in the figure, the push shaft 5 is provided with a slot group 51, and the oscillating sub-assembly group 7 includes an oscillating sub-assembly 71 and an oscillating sub-spring group 72. The top and bottom of the swing sub-assembly 71 are provided with snap-fit ​​block assemblies 711, and the top and bottom walls of the slot assembly 51 are provided with snap-fit ​​slot assemblies that cooperate with the snap-fit ​​block assemblies 711. A connecting groove group 712 is provided at one end of the oscillating sub-assembly 71 away from the moving contact piece group 8. One end of the oscillating sub-spring group 72 is disposed in the connecting groove group 712, and the other end of the oscillating sub-spring group 72 abuts against the slot group 51.

[0043] In this embodiment, the operation of the oscillating sub-assembly 71 during the process of the switch going from open to closed is as follows: the push shaft 5 moves towards the base body 1. During this process, the oscillating sub-assembly 71 gradually slides into the slot assembly 51, and the oscillating sub-spring assembly 72 is compressed until the contact position between the oscillating sub-assembly 71 and the moving contact assembly 8 moves to the other side of the rotation position of the moving contact assembly 8. At this time, the oscillating sub-spring assembly 72 resets and pushes the oscillating sub-assembly 71 to move towards the moving contact assembly 8. The moving contact assembly 8 rotates rapidly, so that the moving contact assembly 81 contacts the stationary contact assembly 1001, and the switch is turned on.

[0044] During the process of switching from on to off, the operation of the oscillating sub-assembly 71 is as follows: the push shaft 5 moves away from the base body 1 under the action of the push shaft spring 6. During this process, the contact position between the oscillating sub-assembly 71 and the moving contact assembly 8 gradually moves until it moves to the other side of the rotation position of the moving contact assembly 8. At this time, the oscillating sub-spring assembly 72 resets and pushes the oscillating sub-assembly 71 to move towards the moving contact assembly 8. The moving contact assembly 8 rotates rapidly, causing the moving contact assembly 81 to separate from the stationary contact assembly 1001, and the switch is turned off.

[0045] like Figure 3 and Figure 4 As shown, the mounting groove 105 group is provided with a sliding groove group 1051, and the push shaft 5 is provided with a slider group 52, which is slidably connected in the sliding groove group 1051.

[0046] In this embodiment, a sliding groove group 1051 is provided in the mounting groove group 105, and a slider group 52 is provided on the push shaft 5. The slider group 52 is slidably connected in the sliding groove group 1051, so that the push shaft 5 is stable in position during movement.

[0047] Specifically, in this embodiment, there can be several sets of slide groove group 1051 and slider group 52, which are respectively arranged in multiple directions, which can further improve the stability of the push shaft 5 during movement.

[0048] like Figure 1 As shown, the wiring unit group 104 includes a screw group 3 and a nut group 4 that mates with the screw group 3.

[0049] In this embodiment, a nut assembly 4 is provided in the mounting groove 105. The threaded connection between the nut assembly 4 and the screw assembly 3 can increase the torque, thereby improving the structural strength after the wire is connected and preventing the wire from falling off.

[0050] It should be noted that the accompanying drawings of this embodiment only show the technical solution for connecting the wiring unit group and the stationary contact group, but the technical solution for connecting the wiring unit group and the bracket group is also within the protection scope of this invention.

[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A short-circuit resistant angle grinder switch, the angle grinder switch comprising a base body, characterized in that: The base body is provided with a wiring part group, the wiring part group is provided with a receiving groove group, the side wall of the receiving groove group is provided with a wiring hole group communicating with the receiving groove group, and the inside of the receiving groove group is provided with a wiring unit group. The wiring assembly is provided with a protective cover assembly connected to the wiring assembly, and the protective cover assembly closes the opening of the receiving groove assembly.

2. The short-circuit-protected angle grinder switch according to claim 1, characterized in that: The top and bottom of the wiring assembly are provided with locking strips, and the top and bottom of the protective cover assembly are provided with locking slots. After the protective cover assembly is installed on the wiring assembly by sliding it sideways, the locking strips are just locked into the locking slots to lock the protective cover assembly onto the wiring assembly.

3. The short-circuit-protected angle grinder switch according to claim 2, characterized in that: The wiring assembly is provided with a positioning protrusion, and the protective cover assembly is provided with a positioning notch. The position of the positioning protrusion matches the position of the positioning notch. When the protective cover assembly is snapped onto the wiring assembly, the positioning protrusion is embedded in the positioning notch.

4. The short-circuit-protected angle grinder switch according to claim 3, characterized in that: The wiring assembly is integrally formed with the base body; The top of the protective cover assembly has a first groove group corresponding to the position of the wiring hole group.

5. The short-circuit-protected angle grinder switch according to claim 4, characterized in that: The bottom of the protective cover assembly is provided with a second groove assembly corresponding to the position of the first groove assembly, and the size of the second groove assembly corresponds to that of the first groove assembly.

6. The short-circuit-protected angle grinder switch according to claim 1 or claim 2, characterized in that: The base body is provided with a mounting groove, and a push shaft and a push shaft spring are provided in the mounting groove. One end of the push shaft extends out of the mounting groove, and the end of the push shaft that is located in the mounting groove is provided with a reciprocating groove. One end of the push shaft spring is located in the reciprocating groove, and the other end of the push shaft spring abuts against the wall of the mounting groove. The push shaft has an oscillating sub-assembly assembly, and a moving contact piece assembly that cooperates with the oscillating sub-assembly assembly is provided on the side of the oscillating sub-assembly assembly away from the push shaft. A bracket assembly and a stationary contact piece assembly are provided in the mounting groove, and the bracket assembly supports the moving contact piece assembly. The moving contact assembly is provided with a moving contact group, and the stationary contact assembly is provided with a stationary contact group that cooperates with the moving contact group.

7. The short-circuit-protected angle grinder switch according to claim 6, characterized in that: The end of the stationary contact assembly that is not equipped with the stationary contact point assembly is connected to the wiring unit.

8. The short-circuit-protected angle grinder switch according to claim 7, characterized in that: The angle grinder switch also includes a top cover, which, together with the base body, forms a housing, and one end of the push shaft extending out of the mounting groove extends out of the housing; The outer wall of the top cover is provided with a sealing groove, and a pressure ring is provided in the sealing groove. A sealing ring is provided at one end of the push shaft that extends out of the box body. The pressure ring fixes one end of the sealing ring to the top cover.

9. The short-circuit-protected angle grinder switch according to claim 8, characterized in that: The push shaft is provided with a slot group, and the oscillating sub-assembly group includes an oscillating sub-assembly and an oscillating sub-spring group; The top and bottom of the swing sub-assembly are provided with snap-fit ​​block assemblies, and the top and bottom walls of the snap-fit ​​slot assembly are provided with snap-fit ​​slot assemblies that cooperate with the snap-fit ​​block assemblies. A connecting groove is provided at one end of the oscillating sub-assembly away from the moving contact plate assembly. One end of the oscillating sub-spring assembly is disposed in the connecting groove assembly, and the other end of the oscillating sub-spring assembly abuts against the slot assembly.

10. The short-circuit-protected angle grinder switch according to claim 6, characterized in that: The mounting groove assembly is provided with a sliding groove assembly, and the push shaft is provided with a slider assembly, the slider assembly being slidably connected within the sliding groove assembly; The wiring unit group includes a screw group and a nut group that mates with the screw group.

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