Separation protection device and machine tool having the same

Abstract

This invention provides a separation protection device and a machine tool equipped with the device. The separation protection device is disposed at the connection between the machine tool body and at least one accessory. The machine tool body has a moving part and includes a normally open first circuit and a normally closed second circuit. The separation protection device also includes a first connector and a second connector. The first connector is disposed on the machine tool body, and the second connector is disposed on the accessory. The first connector and the second connector cooperate to form a through-circuit fit structure and a break-circuit fit structure. When the accessory is connected to the machine tool body to mate the first connector and the second connector, the first circuit is connected and the second circuit is disconnected, allowing the moving part to move. When the accessory is detached from the machine tool body to separate the first connector and the second connector, the first circuit is disconnected and the second circuit is connected, preventing the moving part from moving. The separation protection device and the machine tool equipped with the device are simple to operate and have a high safety factor.

Description

Technical Field

[0001] The invention relates to a separation protection device and a machine tool having the separation protection device. Background Art

[0002] The current electric cleaning tools mainly include a machine body and accessories that are detachably connected to the machine body. Take the outdoor blower-suction machine (single-blow, single-suction or dual-purpose) as an example. This type of cleaning tool is mainly used to clean and collect fallen leaves. The fallen leaves are blown away by blowing, or the fallen leaves are crushed and collected by suction. The machine body is provided with an air inlet and an air outlet. In the blowing state, a blow pipe is installed at the air outlet of the machine body, and a protective cover is installed at the air inlet of the machine body; in the suction state, a collection bag is installed at the air outlet, and a suction pipe is installed on the air inlet. The safe connection between the machine body and the above-mentioned accessories is an important link that must be considered. When the above-mentioned accessories are removed from the machine body, the operator may touch the moving parts in the machine body. Therefore, before the accessories are removed and the operator may touch the moving parts in the machine body, the moving parts must stop moving to ensure safe operation.

[0003] In order to meet the above requirements, a separation protection device needs to be set at the connection between the accessory and the body, and both the air outlet accessory and the air inlet accessory need to adopt a separation protection device to ensure that when any of the accessories is removed, the moving parts in the body are in a stopped state.

[0004] The current separation protection device usually includes a micro switch set on the body and a trigger device set on the accessory. When the accessory is installed on the body, the trigger device contacts the micro switch, so that the micro switch is in a triggered state, and the controller allows the blade to rotate; when the accessory is separated from the body, the trigger device leaves the micro switch contact, so that the micro switch is in a non-triggered state, and the controller prohibits the blade from rotating. However, the use of micro switches has the disadvantages of being large in size, affecting the product structure layout, and being high in cost.

[0005] In view of this, it is necessary to provide an improved separation protection device and a machine tool having the separation protection device. Summary of the invention

[0006] The object of the present invention is to provide a separation protection device and a machine tool having the separation protection device, which are easy to operate and have a high safety factor.

[0007] To achieve the above-mentioned purpose of the invention, the present invention provides a separation protection device, which is arranged at the connection between a body of a machine tool and at least one accessory, wherein a moving part is arranged in the body, and the body includes a normally open first circuit and a normally closed second circuit; the separation protection device also includes a first connector and a second connector that are mechanically and electrically plugged or separated, the first connector is arranged on the body, and the second connector is arranged on the accessory, and the first connector and the second connector cooperate to form a passage cooperation structure and a circuit breaker cooperation structure; when the accessory is connected to the body so that the first connector and the second connector are docked, the first circuit is connected and the second circuit is disconnected, and the moving part is allowed to move; when the accessory is detached from the body so that the first connector and the second connector are separated, the first circuit is disconnected and the second circuit is connected, and the moving part is prohibited from moving.

[0008] As a further improvement of the present invention, the body has at least one connecting end, and at least one accessory detachably connected to the connecting end; the body is provided with the first connector at its connecting end, and the accessory is provided with the second connector. When at least one of the accessories is detached from the body, the second connector corresponding to the detached accessory is separated from the corresponding first connector, so that the first circuit is disconnected and the second circuit is connected, and the moving part is prohibited from moving.

[0009] As a further improvement of the present invention, the body has at least two connection ends, and at least two accessories corresponding to the at least two connection ends one by one; at least two of the passage matching mechanisms are connected in series, and at least two of the circuit breaker matching mechanisms are connected in parallel.

[0010] As a further improvement of the present invention, the first connector has at least one pair of female terminals, a first contact piece and a cable mechanically and electrically connected to the female terminals and the first contact piece; the second connector has at least one pair of electrically connected male terminals and a second contact piece in contact with the first contact piece; the male terminals cooperate with the corresponding female terminals to form the passage cooperation structure; the first contact piece cooperates with the second contact piece to form the disconnection cooperation structure.

[0011] As a further improvement of the present invention, the body is provided with an installation groove for inserting the first connector, and the first connector includes a base, the female terminal fixed in the base, a fixing frame for positioning the female terminal in the base, and the cable connected to the female terminal one by one.

[0012] As a further improvement of the present invention, the first contact member is a first electrode and a second electrode that can elastically contact or separate from each other, and the second contact member is a trigger piece. When the first connector and the second connector are in a separated state, the first circuit is disconnected, and the first electrode and the second electrode contact each other to connect the second circuit; when the first connector and the second connector are plugged in, the second contact member presses the second electrode and disconnects the first electrode from the second electrode, and at this time the first circuit is connected and the second circuit is disconnected.

[0013] As a further improvement of the present invention, the second electrode has a fixed arm fixed in the base of the first connector and an elastic arm connected to the fixed arm, and the second contact piece is a sheet-like structure. When the second connector is separated from the first connector, the first electrode contacts the elastic arm to connect the second circuit; when the second connector is plugged into the first connector, the second contact piece pushes the elastic arm to separate it from the first electrode and disconnect the second circuit.

[0014] As a further improvement of the present invention, the first connector is detachably connected to the body, and the second connector is detachably connected to the accessory.

[0015] In order to achieve the above-mentioned purpose of the invention, the present invention also provides a machine tool, including a machine body and at least one accessory detachably connected to the machine body, wherein the machine body is provided with a moving part, and the moving part is driven by an internal combustion engine. The machine tool also includes a starting motor, a first battery pack for powering the starting motor, and an ignition high-voltage pack, and the machine tool also includes the separation protection device.

[0016] As a further improvement of the present invention, the machine tool also includes a control unit; the first circuit is connected and the second circuit is disconnected to generate a plug-in signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be connected according to the plug-in signal, and controls the grounding circuit of the ignition high-voltage pack to be disconnected.

[0017] As a further improvement of the present invention, the first circuit is disconnected and the second circuit is connected to generate a disconnection signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be disconnected according to the disconnection signal, and controls the grounding circuit of the ignition high-voltage pack to be connected.

[0018] As a further improvement of the present invention, the first circuit is constructed as a circuit connecting the starter motor and the first battery pack; and the passage matching structure is arranged in the first circuit.

[0019] As a further improvement of the present invention, the second circuit is constructed as a circuit for grounding the ignition high-voltage package; and the circuit breaker matching structure is arranged in the second circuit.

[0020] In order to achieve the above-mentioned purpose of the invention, the present invention also provides a machine tool, which includes a machine body and at least one accessory detachably connected to the machine body, wherein a moving part is arranged in the machine body, and the moving part is driven by an electric motor. The machine tool also includes a second battery pack for powering the electric motor, and the machine tool also includes the separation protection device.

[0021] As a further improvement of the present invention, the machine tool also includes a control unit; the first circuit is connected and the second circuit is disconnected to generate a plug-in signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be connected according to the plug-in signal, and controls the short-circuit circuit of the motor to be disconnected.

[0022] As a further improvement of the present invention, the first circuit is disconnected and the second circuit is connected to generate a disconnection signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be disconnected according to the disconnection signal, and controls the short-circuit circuit of the motor to be connected.

[0023] As a further improvement of the present invention, the first loop is constructed as a circuit connecting the electric motor and the second battery pack; and the passage matching structure is arranged in the first loop.

[0024] As a further improvement of the present invention, the second circuit is constructed as a short-circuit circuit of the motor; and the disconnection coordination structure is arranged in the second circuit.

[0025] The beneficial effects of the present invention are as follows: the separation protection device of the present invention is more stable and reliable, and at the same time has a simple structure and lower cost; it is easy to operate during the use of the machine tool, has a more stable mechanical structure, and is easy to assemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the machine tool of the present invention in a blowing state;

[0027] Figure 2 yes Figure 1 A simple schematic diagram of a separation protection device in a first preferred embodiment of the machine tool shown;

[0028] Figure 3 is a schematic diagram of the machine tool of the present invention in a suction state;

[0029] Figure 4 It is a schematic diagram of the overall structure of the machine tool of the present invention in a blowing state;

[0030] Figure 5 yes Figure 4 The illustrated three-dimensional schematic diagram of the machine tool after the accessories at the air outlet end thereof are removed;

[0031] Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle;

[0032] Figure 7 yes Figure 6 A perspective exploded view of a first connector at an air outlet end of the machine tool;

[0033] Figure 8 yes Figure 4 A schematic diagram showing that the blowpipe of the machine tool is equipped with a second connector;

[0034] Fig. 9 yes Figure 8 The enlarged schematic diagram of point B in the middle;

[0035] Fig.10 yes Fig. 9 A perspective exploded view of the second connector on the middle blowing pipe;

[0036] Fig.11 yes Figure 4 A cross-sectional view of the separation protection device of the air outlet end of the machine tool in the plugged-in state;

[0037] Fig.12 yes Fig.11 A cross-sectional view of the separation protection device in a separated state;

[0038] Fig.13 yes Figure 4 A schematic diagram showing that a first connector is installed at the air inlet end of the machine tool;

[0039] Fig.14 yes Fig.13 The enlarged schematic diagram of the center C;

[0040] Fig.15 yes Fig.14 A perspective exploded view of a first connector of a machine tool body at an air inlet end thereof;

[0041] Fig.16 yes Fig.13 A three-dimensional schematic diagram showing a second connector mounted on a shield connected to an air inlet end of the machine tool;

[0042] Fig.17 yes Fig.16 The enlarged schematic diagram of point D in the middle;

[0043] Fig.18 yes Fig.17 a perspective exploded view of the second connector on the middle shield;

[0044] Fig.19 yes Fig.13 A three-dimensional schematic diagram showing that a second connector is installed on the air suction pipe connected to the air inlet end of the machine tool;

[0045] Fig. 20 yes Fig.19 A cross-sectional view of the suction pipe shown;

[0046] Fig.21 is a simple schematic diagram of a separation protection device in a second preferred embodiment of the machine tool of the present invention;

[0047] Fig. 22 is a cross-sectional view of a first connector at an air outlet end of a machine body in a third preferred embodiment of a machine tool of the present invention;

[0048] Fig.23 yes Fig. 22 A perspective exploded view of the first connector shown;

[0049] Fig.24 yes Fig. 22 A cross-sectional view of a separation protection device formed by a first connector of an air outlet and a second connector matched therewith in a separated state;

[0050] Fig.25 yes Fig.24 A cross-sectional view of the separation protection device in the plugged state;

[0051] Fig.26 is a perspective exploded view of a first connector at an air inlet end of a machine body in a third preferred embodiment of a machine tool of the present invention;

[0052] Fig. 27 yes Fig.26 A cross-sectional view of a separation protection device formed by a first connector at an air inlet end and a second connector matched therewith in a plugged state;

[0053] Fig.28 yes Fig. 27 A cross-sectional view of the separation protection device in a separated state;

[0054] Fig.29 is a schematic diagram of a second connector on an air inlet pipe connected to an air inlet end in a third preferred embodiment of a machine tool of the present invention;

[0055] Fig.30 is a schematic diagram of a second connector on a shield connected to an air inlet end in a third preferred embodiment of a machine tool of the present invention;

[0056] Fig.31 Schematic diagram a of the circuit principle of the third preferred embodiment of the machine tool of the present invention;

[0057] Fig.32 Schematic diagram b of the circuit principle of the third preferred embodiment of the machine tool of the present invention;

[0058] Fig.33FIG. c is a circuit schematic diagram of a third preferred embodiment of the machine tool of the present invention;

[0059] Fig.34 d is a circuit schematic diagram of a third preferred embodiment of the machine tool of the present invention. DETAILED DESCRIPTION

[0060] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0061] Please refer to Figures 1 to 20 FIG. 1 is a first preferred embodiment of a machine tool 100 of the present invention, wherein the machine tool 100 comprises a machine body 1 and at least one accessory 3 connected to the machine body 1, a separation protection device 4 is provided at the connection between the machine body 1 and the at least one accessory 3, and a moving part 5 is provided inside the machine body 1. In this embodiment, the machine body 1 comprises first and second normally open circuits.

[0062] The separation protection device 4 includes a first connector 41 and a second connector 42 that are mechanically and electrically plugged or separated. The first connector 41 is arranged on the body 1, and the second connector 42 is arranged on the accessory 3. The first connector 41 and the second connector 42 cooperate to form a passage cooperation structure and a circuit breaking cooperation structure.

[0063] Furthermore, in this embodiment, the machine tool 100 also includes a control unit 2; the moving part 5 of the machine tool 100 can be driven by an internal combustion engine, and the machine tool also includes a starter motor, a first battery pack for powering the starter motor, and an ignition high-voltage pack.

[0064] In this embodiment, when the accessory 3 is connected to the body 1 so that the first connector 41 and the second connector 42 are docked, the first circuit is connected and the second circuit is connected, and the moving part 5 is allowed to move; when the accessory 3 is detached from the body 1 so that the first connector 41 and the second connector 42 are separated, the first circuit is disconnected and the second circuit is disconnected, and the moving part 5 is prohibited from moving.

[0065] Furthermore, when the accessory 3 is connected to the body 1, the first connector 41 is plugged into the second connector 42, so that the first and second circuits are connected and a plug-in signal is generated, and the control unit 2 controls the electrical connection circuit between the starter motor and the first battery pack to be connected according to the plug-in signal, and controls the grounding circuit of the ignition high-voltage package to be disconnected. When the accessory 3 is separated from the body 1, the first connector 41 is separated from the second connector 42, so that the first and second circuits are disconnected and a disconnection signal is generated, and the control unit 2 controls the electrical connection circuit between the starter motor and the first battery pack to be disconnected according to the disconnection signal, and controls the grounding circuit of the ignition high-voltage package to be connected.

[0066] In the present embodiment, the machine tool 100 detects through the control unit 2 and controls whether the moving component 5 in the machine body 1 rotates according to the on-off state signal obtained by the control unit 2 .

[0067] The first connector 41 is detachably connected to the body 1, and the second connector 42 is detachably connected to the accessory 3. When the first connector 41 or the second connector 42 is damaged, the damaged connector can be easily replaced, which is convenient for maintenance and replacement, and is easy to install.

[0068] The body 1 has at least one connection end and at least one accessory 3 detachably connected to the connection end, and the body 1 is provided with the first connector 41 at its connection end. When at least one accessory 3 is detached from the body 1, the second connector 42 corresponding to the detached accessory 3 is separated from the corresponding first connector 41, so that the first and second circuits thereof are disconnected, and the moving component 5 is prohibited from moving.

[0069] In this embodiment, the machine body 1 has two connection ends (i.e., the air inlet end 11 and the air outlet end 12), and the accessories 3 include a first accessory 31 detachably connected to the air inlet end 11 and a second accessory 32 detachably connected to the air outlet end 12. In other words, the machine body 1 has at least two connection ends, and at least two accessories 3 corresponding to the at least two connection ends; at least two of the passage matching mechanisms are connected in series, and at least two of the circuit breaker matching mechanisms are connected in parallel.

[0070] The accessory 3 may be a blowing tube 321, a protective cover 311, a collecting bag 322 or a suction tube 312; taking a dual-purpose blowing and suction blower as an example, in the blowing state, the blowing tube 321 is installed at the air outlet end 12 of the machine body 1, and the protective cover 311 is installed at the air inlet end 11 of the machine body; in the suction state, the collecting bag 322 is installed at the air outlet end 12, and the suction tube 312 is installed at the air inlet end 11. In other embodiments of the present invention, the machine tool 100 may also be a hair dryer with only a blowing state or a suction blower with only a suction state, but is not limited thereto.

[0071] Please refer to Figure 1 and Figure 4 1 is a schematic diagram of the structure of the machine tool 100 of the present invention in the blowing state, wherein the first accessory 31 connected to the body 1 of the machine tool 100 is a shield 311, and the second accessory 32 connected is a blowing pipe 321; see FIG. Figure 3 , which is a schematic diagram of the machine tool 100 in a suction state, the first accessory 31 connected to the machine body 1 is a suction pipe 312 , and the second accessory 32 connected to the machine body 1 is a collection bag 322 .

[0072] The first connector 41 is connected to the control unit 2, and has at least one pair of female terminals 411, a first contact 412, and a cable 413 correspondingly mechanically and electrically connected to the female terminals 411 and the first contact 412, and the cable 413 is electrically connected to the control unit 2. The second connector 42 has at least one pair of electrically connected male terminals 421 and a second contact 422 in contact with the first contact 412, and the male terminals 421 are plugged into the corresponding female terminals 411 to close the first circuit. In this embodiment, the first contact 412 is in contact with the second contact 422 to close the second circuit.

[0073] In this embodiment, the body 1 is provided with a first connector 41 at its air inlet end 11 and the air outlet end 12, and the first accessory 31 and the second accessory 32 are provided with a second connector 42. When any one or both of the first accessory 31 and the second accessory 32 are detached from the body 1, the second connector 42 corresponding to the detached first accessory 31 and / or second accessory 32 is separated from the corresponding first connector 41, and the control unit 2 controls the moving part 5 to stop rotating.

[0074] Please refer to Figure 6 to Figure 7 As shown, the body 1 is provided with a mounting groove 13 for inserting the first connector 41, and the first connector 41 includes a base 414, the female terminal 411 fixed in the base 414, a fixing frame 415 for positioning the female terminal 411 in the base 414, and the cable 413 connected to the female terminal 411 in a one-to-one correspondence.

[0075] In this embodiment, the first contact member 412 is another pair of the female terminals, and the second contact member 422 is another pair of the male terminals, wherein one pair of the female terminals 411 and the male terminals 421 are plugged together to form the first circuit, and the other pair of the female terminals 412 and the male terminals 422 are plugged together to form the second circuit, the first circuit is a battery pack discharge circuit or a battery pack discharge detection circuit, and the second circuit is a motor power supply circuit or a motor power supply detection circuit, and only when both the first circuit and the second circuit are connected, the control unit 2 allows the moving part 5 to rotate.

[0076] Please refer to Figures 8 to 10 As shown, the second connector 42 includes a male terminal seat 423 and a pair of male terminals 421 and the second contact member 422 fixed in the male terminal seat 423, and the two male terminals in each pair of male terminals 421, 422 are electrically connected via a connector 424 connected therebetween.

[0077] Please refer to Figures 10 to 12 As shown, the second connector 42 of the blowing pipe 321 connected to the air outlet end 12 also has a base plate 425 located at the rear side of the male terminal 421 and the second contact piece 422 and a mounting base 426 connected to the male terminal base 423, and the mounting base 426 is fixedly connected to the blowing pipe 321 by a plurality of fasteners 427. The male terminal seat 423 of the second connector 42 on the blowing pipe 321 is provided with a pair of ears 4231 located on both sides thereof and protruding outward, each of the ears 4231 is provided with a through hole 4232 passing therethrough, the mounting seat 426 is provided with a pair of first mounting holes 4261 respectively aligned with the corresponding through holes 4232, the tube body of the blowing pipe 321 is provided with a second mounting hole 3211 aligned with the mounting holes, a pair of fasteners 427 are sequentially inserted into the corresponding through holes 4232, the first mounting hole 4261 and the second mounting hole 3211 to fix the male terminal seat 423 and the mounting seat 426 to the tube body of the blowing pipe 321.

[0078] Please refer to Figures 13 to 15As shown, the air inlet end 11 of the machine tool is installed with a first connector 41, the first connector 41 has a base 414 and a terminal slot opened on the base 414, the terminal slot includes a side plug hole 4142 and a front plug hole 4141 connected to the side plug hole 4142, the first connector 41 is limited to the air inlet end 11 of the machine body 1 by a positioning member 416, and is fixed by a fastener (not shown). The number of bases 414 of the first connector 41 arranged at the air inlet end 11 is two, each base 414 is fixed with a pair of female terminals 411, and a corresponding fixing frame 415 is arranged, and the fixing frame 415 is fixedly connected to the corresponding base 414 by a connecting member 417. The positioning member 416 has at least one fixing hole 4161 for it to be installed and fixed to the machine body 1.

[0079] Please refer to Figures 16 to 18 As shown, it is a schematic diagram of the protective cover 311 and the second connector 42 installed on the protective cover 311, the second connector 42 has a male terminal seat 423 and a male terminal 421 inserted into the male terminal seat 423, each of the male terminals 421 and the connecting body 424 connected between a pair of male terminals 421 are both arc-shaped sheet structures, and the male terminal seat 423 is provided with a limiting hole 4233 recessed in its side edge and a positioning hole 4234 penetrating through the middle thereof.

[0080] Please refer to Figures 19 to 20 Combined with Fig.14 1 is a schematic diagram of an air suction pipe 312 connected to the air inlet end 11 of the machine body 1 and a second connector 42 arranged thereon. The air suction pipe 312 is connected to the air inlet end 11 of the machine body 1 through an axial mounting groove 3121 and a radial mounting groove 3122. Fig.14 The protrusion 14 in the body is matched to connect with the body 1, such as Fig.14 As shown, the first connector 41 at the air inlet end 11 of the body 1 is also provided with a side socket 4142 and a front socket 4141 connected to the side socket 4142. When the air suction pipe 312 is rotated and fixed, the male terminal 421 of the second connector 42 enters the terminal slot of the first connector 41 from the side socket 4142.

[0081] The machine tool 100 further comprises a handle assembly 6 for a user to operate and a battery pack assembly 7 connected to the control unit 2 . The battery pack assembly 7 is detachably mounted to the machine body 1 .

[0082] Specifically, in this embodiment, when the accessory 3 is connected to the body 1, the first connector 41 is plugged into the second connector 42 to connect the first and second circuits and generate the plug-in signal, and the control unit 2 detects the plug-in signal and controls the moving part 5 to rotate; when the accessory 3 is separated from the body 1, the first connector 41 is separated from the second connector 42 to disconnect the first and second circuits and generate the disconnection signal, and the control unit 2 detects the disconnection signal and controls the moving part 5 to stop rotating.

[0083] Please refer to Fig.21 FIG. 1 is a schematic diagram of a separation protection device in a second preferred embodiment of a machine tool of the present invention, wherein the basic structure of the machine tool is similar to that in the first preferred embodiment, wherein the same structure is not repeated here, and only the differences between the two embodiments are described below:

[0084] In the second preferred embodiment of the present invention, the accessories of the machine tool further include a third accessory 33' detachably connected between the second accessory 32' and the machine body 1', for example, the third accessory 33 may be an extension tube, etc. The second connector 42' and the first connector 41' are respectively provided at both ends of the third accessory 33', the second connector 42' on the third accessory 33' is plugged with the first connector 41' provided on the machine body 1, and the first connector 41' on the third accessory 33' is plugged with the second connector 42' provided on the second accessory 32', so that the separation protection device is respectively provided at the connection between the machine body 1' and the third accessory 33' and at the connection between the second accessory 32' and the third accessory 33'.

[0085] The number of the third accessories 33' is at least one. When multiple third accessories 33' are connected, a first connector 41' and a second connector 42' are respectively provided at both ends of each third accessory 33'. The plugging method is the same as above and will not be repeated here.

[0086] Please refer to Figures 22 to 31 As shown, the third preferred embodiment of the machine tool of the present invention is shown, wherein the basic structure and assembly relationship of the machine tool body, accessories and corresponding first and second connectors 41", 42" are the same as those in the first preferred embodiment.

[0087] Different from the first preferred embodiment, in this embodiment, the machine body includes a normally open first circuit and a normally closed second circuit. When the accessory is connected to the machine body, the first connector 41" is plugged into the second connector 42", so that the first circuit is connected and the second circuit is disconnected and a plug-in signal is generated, and the moving part is allowed to move; when the accessory is separated from the machine body, the first connector 41" is separated from the second connector 42", so that the first circuit is disconnected and the second circuit is connected and a disconnection signal is generated, and the moving part is prohibited from moving.

[0088] As in the first preferred embodiment, the machine tool further includes a control unit, which detects and controls whether the moving parts in the machine body rotate according to the on-off state signal obtained by the control unit. The difference is that the first circuit is connected and the second circuit is disconnected to generate the plug-in signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be connected according to the plug-in signal, and controls the grounding circuit of the ignition high-voltage package to be disconnected. The first circuit is disconnected and the second circuit is connected to generate the disconnection signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be disconnected according to the disconnection signal, and controls the grounding circuit of the ignition high-voltage package to be connected.

[0089] Further, taking the separation protection device 4" at the air outlet as an example, the first connector 41" includes a base 414", a female terminal 411" fixed in the base 414", a fixing frame 415" for positioning the female terminal 411" in the base 414", and the cable 413" connected to the female terminal 411" in a one-to-one correspondence. The second connector 42" has a male terminal seat 423", a pair of male terminals 421" inserted in the male terminal seat 423", a connector 424" connected between the pair of male terminals 421", and a bottom plate 425" located on the rear side of the male terminal 421". The remaining identical structures are not repeated here, and only the differences from the first preferred embodiment are described below:

[0090] In this embodiment, the first contact piece 412" of the first connector 41" is a first electrode 4121" and a second electrode 4122" that can elastically contact or separate from each other, the second contact piece 422" is a trigger piece, the male terminal 421" cooperates with the corresponding female terminal 411" to form the passage matching structure, and the first contact piece 412" cooperates with the second contact piece 422" to form the disconnection matching structure.

[0091] When the first connector 41" and the second connector are in a separated state, the first circuit is disconnected, and the first electrode 4121" and the second electrode 4122" contact each other to connect the second circuit to generate a disconnection signal; when the first connector 41" and the second connector 42" are plugged in, the second contact piece 422" presses the second electrode 4122" and disconnects the first electrode 4121" and the second electrode 4122", at this time, the first circuit is connected and the second circuit is disconnected to generate a connection signal.

[0092] The second electrode 4122" has a fixed arm 4123" fixed in the base 414" of the first connector 41", and an elastic arm 4124" connected to the fixed arm 4123". The second contact piece 422" is a sheet structure. When the second connector 42" is separated from the first connector 41", the first electrode 4121" contacts the elastic arm 4124" to connect the second circuit; when the second connector 42" is plugged into the first connector 41", the second contact piece 422" pushes the elastic arm 4124" to separate it from the first electrode 4121" and disconnect the second circuit.

[0093] In this embodiment, a first circuit and a second circuit are also formed between the first connector 41 ″ and the second connector 42 ″. When the control unit detects that the first circuit is connected and the second circuit is disconnected, the moving parts in the body are allowed to rotate; otherwise, the moving parts are prohibited from rotating.

[0094] When the first connector 41" is plugged into the second connector 42", the first circuit is connected, the second circuit is disconnected, and a plug-in signal is generated. The control unit detects the plug-in signal and controls the moving part to rotate; when the first connector 41" is separated from the second connector 42", the first circuit is disconnected, the second circuit is connected, and the disconnection signal is generated. The control unit detects the disconnection signal and controls the moving part to stop rotating.

[0095] Please refer to Fig.29 As shown, it is a schematic diagram of the structure of the second connector 42" on the suction pipe 312" located at the air inlet end of the body. The structure of the second connector 42" is similar to the shape and structure of the second connector 42 on the suction pipe 312 in the first embodiment, and the only difference is that: in this embodiment, the second connector 42" on the suction pipe 312" has a pair of male terminals 421" and a trigger sheet (i.e., a second contact piece) 422".

[0096] Please refer to Fig.30As shown, it is a schematic diagram of the structure of the second connector 42" on the shield 311" located at the air inlet end of the body. The structure of the second connector 42" is similar to the shape and structure of the second connector 42 on the shield 311 in the first embodiment, and the only difference is that: in this embodiment, the second connector 42" on the shield 311" has a pair of male terminals 421" and a trigger sheet (i.e., a second contact piece) 422".

[0097] The third preferred embodiment of the machine tool of the present invention can be implemented according to different circuit schematics, wherein please refer to Fig.31 Shown is a circuit schematic diagram a of the third preferred embodiment of the machine tool of the present invention. In this embodiment, k0 represents the main switch of the machine tool, k1 and k2 respectively represent switches of the first circuit and the second circuit formed between the machine body and the first and second connectors 41", 42" respectively corresponding to the accessories connected to the air outlet end, k3 and k4 respectively represent switches of the first circuit and the second circuit formed between the machine body and the first and second connectors 41", 42" respectively corresponding to the accessories connected to the air inlet end, the switches k1 and k2 of the first circuit and the second circuit corresponding to the same accessory are linked and have opposite on-off states, and at the same time, the switch k1 of the first circuit at the air inlet end and the switch k3 of the first circuit at the air outlet end are arranged in series, and the switch k2 of the second circuit at the air inlet end and the switch k4 of the second circuit at the air outlet end are arranged in series.

[0098] Please refer to Fig.32 The figure shows the circuit schematic diagram b of the third preferred embodiment of the machine tool of the present invention. In this embodiment, the first and second connectors are directly used as switches, the first circuit is configured as a circuit connecting the starter motor and the first battery pack; the passage matching structure is arranged in the first circuit. The second circuit is configured as a circuit for grounding the ignition high-voltage package; the disconnection matching structure is arranged in the second circuit.

[0099] In this embodiment, b1 to b7 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" corresponding to the machine body and the accessories connected to the air outlet, respectively; b8 to b14 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" corresponding to the machine body and the accessories connected to the air inlet, respectively. The switch contacts b1-b2 and b3-b4 of the first circuit corresponding to the air outlet are respectively linked with the switch contacts b5-b6-b7 of the second circuit and have opposite on-off states (the symbols of the switch contacts b1-b2, and the same symbols hereinafter indicate that the circuit between the contact b1 and the contact b2 is normally open, and when the contact b1 is connected to the contact b2, the circuit is closed; the symbols of the switch contacts b5-b6-b7, and the same symbols hereinafter indicate that the circuit between the contact b6 and the contact b7 is normally closed, and when the contact b5 is inserted between the contact b6 and the contact b7, the circuit is closed. The switch contacts b8-b9 and b10-b11 of the first circuit corresponding to the air inlet end are respectively linked with the switch contacts b12-b13-b14 of the second circuit and have opposite on-off states. At the same time, the switch contacts b1-b2 and b3-b4 of the first circuit at the air outlet end and the switch contacts b8-b9 and b10-b11 of the first circuit at the air inlet end are arranged in series, and the switch contacts b5-b6-b7 of the second circuit at the air outlet end and the switch contacts b12-b13-b14 of the second circuit at the air inlet end are arranged in parallel.

[0100] Please refer to Fig.33 (Circuit Schematic Diagram c) and Fig.34 As shown in (circuit principle diagram d), the moving parts of the machine tool can also be driven by an electric motor, and the machine tool also has a second battery pack to supply power to the electric motor.

[0101] Specifically, Fig.33 As shown, in this embodiment, the machine tool also includes a control unit; the first circuit is connected and the second circuit is disconnected to generate a plug-in signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be connected according to the plug-in signal, and controls the short-circuit circuit of the motor to be disconnected.

[0102] The first circuit is disconnected and the second circuit is connected to generate a disconnection signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be disconnected according to the disconnection signal, and controls the short-circuit circuit of the motor to be connected.

[0103] In this embodiment, c1~c4 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" respectively corresponding to the machine body and the accessories connected to the air outlet, and c5~c8 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" respectively corresponding to the machine body and the accessories connected to the air inlet. The switch contacts c1-c2 of the first circuit corresponding to the air outlet are linked with the switch contacts c3-c4 of the second circuit, and the on-off states are opposite; the switch contacts c7-c8 of the first circuit corresponding to the air inlet are linked with the switch contacts c5-c6 of the second circuit, and the on-off states are opposite. At the same time, the switch contacts c1-c2 of the first circuit of the air outlet and the switch contacts c7-c8 of the first circuit of the air inlet are arranged in series, and the switch contacts c3-c4 of the second circuit of the air outlet and the switch contacts c5-c6 of the second circuit of the air inlet are arranged in parallel.

[0104] like Fig.34 As shown, the first circuit is configured as a circuit connecting the motor and the second battery pack; the passage matching structure is arranged in the first circuit. The second circuit is configured as a short circuit of the motor; the disconnection matching structure is arranged in the second circuit.

[0105] In this embodiment, d1~d7 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" respectively corresponding to the machine body and the accessories connected to the air outlet end, and d8~d14 represent the switch contacts of the first circuit and the second circuit formed between the first and second connectors 41", 42" respectively corresponding to the machine body and the accessories connected to the air inlet end. The switch contacts d1-d2 and d3-d4 of the first circuit corresponding to the air outlet end are respectively linked with the switch contacts d5-d6-d7 of the second circuit and have opposite on-off states; the switch contacts d8-d9 and d10-d11 of the first circuit corresponding to the air inlet end are respectively linked with the switch contacts d12-d13-d14 of the second circuit and have opposite on-off states. At the same time, the switch contacts d1-d2 and d3-d4 of the first circuit at the air outlet end and the switch contacts d8-d9 and d10-d11 of the first circuit at the air inlet end are arranged in series, and the switch contacts d5-d6-d7 of the second circuit at the air outlet end and the switch contacts d12-d13-d14 of the second circuit at the air inlet end are arranged in parallel.

[0106] Compared with the traditional micro switch type separation protection device, the separation protection device of the machine tool of the present invention is more stable and reliable, and at the same time has a simple structure and lower cost; it is simple to operate during use, has a more stable mechanical structure, and is easy to assemble and maintain.

[0107] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0108] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A separation protection device, the separation protection device is arranged at the connection between a machine tool body and at least one accessory, wherein a moving part is arranged in the machine tool body, and characterized in that: The body includes a normally open first circuit and a normally closed second circuit; The separation protection device further comprises a first connector and a second connector that are mechanically and electrically pluggable or separable, the first connector being arranged on the body, the second connector being arranged on the accessory, and the first connector and the second connector being matched to form a passage matching structure and a circuit breaking matching structure; When the accessory is connected to the body so that the first connector is mated with the second connector, the first circuit is connected and the second circuit is disconnected, and the moving part is allowed to move; When the accessory is detached from the body to separate the first connector from the second connector, the first circuit is disconnected and the second circuit is connected, and the moving component is prohibited from moving.

2. The separation protection device according to claim 1, characterized in that: The body has at least one connection end, and at least one accessory detachably connected to the connection end; the body is provided with the first connector at its connection end, and the accessory is provided with the second connector. When at least one of the accessories is detached from the body, the second connector corresponding to the detached accessory is separated from the corresponding first connector, so that the first circuit is disconnected and the second circuit is connected, and the moving part is prohibited from moving.

3. The separation protection device according to claim 1, characterized in that: The machine body has at least two connection ends and at least two accessories corresponding to the at least two connection ends one by one; at least two of the passage matching mechanisms are connected in series, and at least two of the circuit breaker matching mechanisms are connected in parallel.

4. The separation protection device according to any one of claims 1 to 3, characterized in that: The first connector has at least one pair of female terminals, a first contact piece, and a cable mechanically and electrically connected to the female terminals and the first contact piece. The second connector has at least one pair of electrically connected male terminals and a second contact piece in contact with the first contact piece. The male terminals cooperate with the corresponding female terminals to form the passage cooperation structure, and the first contact piece cooperates with the second contact piece to form the disconnection cooperation structure.

5. The separation protection device according to claim 4, characterized in that: The body is provided with an installation slot for inserting the first connector, and the first connector includes a base, the female terminal fixed in the base, a fixing frame for positioning the female terminal in the base, and the cables connected to the female terminals in a one-to-one correspondence.

6. The separation protection device according to claim 4, characterized in that: The first contact piece is a first electrode and a second electrode that can elastically contact or separate from each other, and the second contact piece is a trigger piece. When the first connector and the second connector are in a separated state, the first circuit is disconnected, and the first electrode and the second electrode contact each other to connect the second circuit; when the first connector and the second connector are plugged in, the second contact piece presses the second electrode and disconnects the first electrode from the second electrode, and at this time, the first circuit is connected and the second circuit is disconnected.

7. The separation protection device according to claim 6, characterized in that: The second electrode has a fixed arm fixed in the base of the first connector and an elastic arm connected to the fixed arm. The second contact piece is a sheet-like structure. When the second connector is separated from the first connector, the first electrode contacts the elastic arm to connect the second circuit; when the second connector is plugged into the first connector, the second contact piece pushes the elastic arm to separate it from the first electrode and disconnect the second circuit.

8. The separation protection device according to any one of claims 1 to 3, characterized in that: The first connector is detachably connected to the body, and the second connector is detachably connected to the accessory.

9. A machine tool, comprising a machine body and at least one accessory detachably connected to the machine body, wherein a moving part is disposed in the machine body and driven by an internal combustion engine, the machine tool further comprising a starter motor, a first battery pack for supplying power to the starter motor, and an ignition high-voltage pack, characterized in that: It also includes a separation protection device as described in any one of claims 1 to 8.

10. The machine tool according to claim 9, characterized in that: The machine tool also includes a control unit; the first circuit is connected and the second circuit is disconnected to generate a plug-in signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be connected according to the plug-in signal, and controls the grounding circuit of the ignition high-voltage package to be disconnected.

11. The machine tool according to claim 10, characterized in that: The first circuit is disconnected and the second circuit is connected to generate a disconnection signal, and the control unit controls the electrical connection circuit between the starter motor and the first battery pack to be disconnected according to the disconnection signal, and controls the grounding circuit of the ignition high-voltage package to be connected.

12. The machine tool according to claim 9, characterized in that: The first circuit is constructed as a circuit connecting the starter motor and the first battery pack; the passage matching structure is arranged in the first circuit.

13. The machine tool according to claim 12, characterized in that: The second circuit is constructed as a circuit for grounding the ignition high-voltage package; and the circuit breaker matching structure is arranged in the second circuit.

14. A machine tool, comprising a machine body and at least one accessory detachably connected to the machine body, wherein a moving part is disposed in the machine body and driven by an electric motor, and wherein the machine tool further comprises a second battery pack for supplying power to the electric motor, wherein: It also includes a separation protection device as described in any one of claims 1 to 8.

15. The machine tool according to claim 14, characterized in that: The machine tool also includes a control unit; the first circuit is connected and the second circuit is disconnected to generate a plug-in signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be connected according to the plug-in signal, and controls the short-circuit circuit of the motor to be disconnected.

16. The machine tool according to claim 15, characterized in that: The first circuit is disconnected and the second circuit is connected to generate a disconnection signal, and the control unit controls the electrical connection circuit between the motor and the second battery pack to be disconnected according to the disconnection signal, and controls the short-circuit circuit of the motor to be connected.

17. The machine tool according to claim 14, characterized in that: The first loop is configured as a circuit connecting the electric motor and the second battery pack; the passage matching structure is disposed in the first loop.

18. The machine tool according to claim 14, characterized in that: The second circuit is configured as a short-circuit circuit of the motor; and the disconnection coordination structure is arranged in the second circuit.

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