Multi-mode switching unit and grinding and cutting equipment

Abstract

The utility model relates to the technical field of mechanical equipment, in particular to a multi-mode switching unit and grinding and cutting equipment, the grinding and cutting equipment comprises a machine body and a pneumatic foot switch, the pneumatic foot switch is connected with the multi-mode switching unit arranged in the machine body, and the multi-mode switching unit comprises a switching module and a switching switch. The switching module comprises a first input end, a second input end and an output end, the first input end is directly connected with the output end, a pneumatic pedal switch is arranged between the second input end and the output end, the output end is connected with the current input end of the speed regulation control circuit, and the switching switch is used for selectively conducting the current output end and the first input end or the second input end. The pneumatic foot switch does not relate to an electrical safety system, the electrical safety checking requirements of all countries and regions can be met, the pneumatic foot switch has the advantages of being high in safety and stability, the grinding and cutting equipment connected with the pneumatic foot switch can switch different control modes according to use requirements, and the applicability of the equipment is enhanced.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and in particular to a multi-mode switching unit and a grinding and cutting device. Background Technology

[0002] Grinding and cutting equipment is one of the most commonly used pieces of equipment in the field of machining. It plays an almost irreplaceable role in the machining process and is mainly used for cutting and processing wood, plastic and other boards.

[0003] Taking wire saws as an example, most existing wire saws use electric control switches to control their start and stop. After the power is on, pressing the start switch starts the wire saw, completing the wire sawing work. Turning off the start switch stops the wire saw. Some wire saws also use electric foot switches to control their start and stop. However, this method has many problems in actual use. Firstly, because different countries and regions have different standards and requirements for electrical equipment, when exporting, not only must the wire saw's circuit system be adapted and adjusted, but the electrical safety of the added electric foot switch also needs to be tested. This is tedious, complex, costly, and extremely inconvenient. Secondly, electric foot switches are prone to leakage, are greatly affected by water, and are prone to sparking, affecting the use and cutting quality of the wire saw.

[0004] Therefore, there is an urgent need for a multi-mode switching unit that can meet the electrical safety inspection requirements of various countries and regions, as well as grinding and cutting equipment equipped with such a multi-mode switching unit. Utility Model Content

[0005] The purpose of this application is to provide a multi-mode switching unit and a grinding and cutting device to solve the problems existing in the prior art, such as the grinding and cutting devices being unable to meet the electrical safety inspection requirements of various countries and regions, poor adaptability, safety hazards, and general stability.

[0006] The embodiments of this application can be implemented through the following technical solutions:

[0007] A multi-mode switching unit is disposed between the current output terminal of a power switch and the current input terminal of a speed control circuit, the speed control circuit being used to adjust the speed of a motor, comprising:

[0008] The switching module includes a first input terminal, a second input terminal, and an output terminal. The first input terminal and the output terminal are directly connected. A pneumatic foot switch is provided between the second input terminal and the output terminal. The output terminal is connected to the current input terminal of the speed control circuit.

[0009] A switching switch is disposed between the current output terminal of the power switch and the switching module, for selectively connecting the current output terminal to either the first input terminal or the second input terminal.

[0010] Furthermore, it also includes an indicator light, the input terminal of which is connected to the second input terminal, and the output terminal of which is connected to the current output terminal of the speed control circuit.

[0011] Furthermore, the switch is a slide switch, a toggle switch, or a push-button switch.

[0012] Furthermore, the pneumatic foot switch includes a foot inflation device, a micro switch assembly, and an air tube. The foot inflation device is connected to the micro switch assembly through the air tube. Under the action of air pressure, the micro switch assembly is triggered to turn on or off through its internal diaphragm, thereby adjusting the on or off state of its circuit.

[0013] Furthermore, the micro switch assembly includes a positioning connector, a limiting member, and a micro switch. The touch end of the micro switch is housed in a cavity between the two side walls of the positioning connector and cooperates with a diaphragm provided inside the positioning connector. There is an elastic deformation space between the two side walls of the positioning connector. The two side walls of the positioning connector extend toward the same end and gradually narrow, and the ends of the two side walls are independent.

[0014] The limiting member is sleeved on the outside of the two side walls of the positioning connector and provides an inward contraction force to the two side walls of the positioning connector.

[0015] Furthermore, the micro switch is a normally open micro switch or a self-locking micro switch.

[0016] This application also provides a grinding and cutting device, including the multi-mode switching unit as described above, and a machine body, wherein the machine body is any one of a wire saw, a polishing machine, a belt sander, a grinding wheel machine, a band saw, and a table saw.

[0017] Furthermore, the body is provided with a pneumatic inlet, and the pneumatic foot switch also includes an air pipe connector. The foot pedal inflation device, air pipe connector, and air pipe together constitute a pneumatic input component. The micro switch component is connected to the inside of the pneumatic inlet, and the pneumatic input component is detachably connected to the micro switch component inside the body through the pneumatic inlet.

[0018] Furthermore, the micro switch assembly and the air pipe connector are detachably connected via mating threaded openings and nuts or mating snaps and slots.

[0019] Furthermore, when the machine body is a wire saw, the machine body also includes a frame and a base. The switching switch is located on the outside of the frame. A workbench is provided on the upper end of the base. A wire saw mechanism is provided on the frame. The wire saw mechanism is supported above the workbench by the frame. The wire saw machine is provided with a saw blade bracket and a saw blade. The saw blade is supported by the saw blade bracket. The lower end of the saw blade passes through the wire saw hole of the workbench and is located at the center of the wire saw hole.

[0020] The multi-mode switching unit and grinding and cutting equipment provided in the embodiments of this application have at least the following beneficial effects:

[0021] The pneumatic foot switch in this application does not involve electrical safety systems and can meet the electrical safety verification requirements of various countries and regions. It has the advantages of high safety and strong stability. Furthermore, the grinding and cutting equipment connected to the pneumatic foot switch can switch between different control modes according to usage requirements, which enhances the applicability of the equipment. Attached Figure Description

[0022] Figure 1 , Figure 2 These are the electrical schematics of the multi-mode switching unit in this application under different modes;

[0023] Figure 3 This is a schematic diagram of the overall structure of a multi-mode switching wire saw according to this application;

[0024] Figure 4 This is a schematic diagram of the overall structure of the pneumatic foot switch in this application;

[0025] Figure 5 This is a schematic diagram showing the connection between the endotracheal connector and the microswitch assembly in this application;

[0026] Figure 6 This is an exploded structural diagram of the positioning connector in this application.

[0027] Numbers in the diagram

[0028] 1-Main body; 10-Motor; 11-Frame; 12-Base; 121-Workbench; 13-Wire saw; 131-Saw blade support; 132-Saw blade; 14-Changeover switch; 15-Indicator light; 16-Pneumatic inlet; 2-Pneumatic foot switch; 21-Foot pedal inflation device; 22-Air hose connector; 23-Micro switch assembly; 231-Positioning connector; 232-Limiting component; 233-Micro switch; 24-Air hose. Detailed Implementation

[0029] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0030] In addition, for ease of understanding, various components on the drawings have been enlarged (thickened) or reduced (thinned), but this is not intended to limit the scope of protection of this application.

[0031] Singular forms of words also include plural meanings, and vice versa.

[0032] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0033] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0034] Example 1

[0035] Figure 1 , Figure 2 The electrical schematics of the multi-mode switching unit in this application under different modes are respectively. Figure 3 This is a schematic diagram of the overall structure of the wire saw machine in this application, as shown below. Figures 1 to 3 As shown, a grinding and cutting device includes a body 1 and a pneumatic foot switch 2. The body 1 is provided with a multi-mode switching unit. The pneumatic foot switch 2 is connected to the multi-mode switching unit. The multi-mode switching unit is located between the current output terminal of the power switch and the current input terminal of the speed control circuit, and is used to adjust the working mode of the body 1 to electric control or pneumatic control.

[0036] In some preferred embodiments, the multi-mode switching unit includes a switching module and a switching switch 14. The switching module includes a first input terminal, a second input terminal, and an output terminal. The first input terminal and the output terminal are directly connected. A pneumatic foot switch 2 is disposed between the second input terminal and the output terminal. The output terminal is connected to the current input terminal of the speed control circuit. The switching switch 14 is disposed between the current output terminal of the power switch and the switching module, and is used to selectively connect the current output terminal to either the first input terminal or the second input terminal of the switching module. The speed control circuit is used to adjust the speed of the motor 10. By changing the connection point of the switching switch 14, the motor 10 can be adjusted to either an electronic speed control mode or a pneumatic speed control mode.

[0037] In some preferred embodiments, the machine body 1 is any one of a wire saw, polishing machine, belt sander, grinding wheel machine, band saw, and table saw. The following description uses a wire saw as an example.

[0038] In some preferred embodiments, when the machine body 1 is a wire saw, the machine body 1 further includes a frame 11, and the switching switch 14 is disposed on the outside of the frame 11. The switching switch 14 is a sliding switch, a toggle switch, or a push-button switch, used to selectively turn on the first input terminal or the second input terminal.

[0039] In some preferred embodiments, the machine body 1 further includes a base 12, with a workbench 121 at the upper end of the base 12. A wire saw mechanism 13 is mounted on the frame 11, and the wire saw mechanism 13 is supported above the workbench 121 by the frame 11. The wire saw machine 3 is provided with a saw blade support 131 and a saw blade 132. The saw blade 132 is supported by the saw blade support 131, and the lower end of the saw blade 132 passes through the wire saw hole of the workbench 121 and is positioned at the center of the wire saw hole for cutting wood, metal or other materials.

[0040] In some preferred embodiments, the body 1 is provided with an indicator light 15, the input terminal of the indicator light 15 is connected to the second input terminal, and the output terminal of the indicator light 15 is connected to the current output terminal of the speed control circuit, so that the indicator light 15 will be turned on whenever the multi-mode switching unit is switched to the start / stop mode controlled by the pneumatic foot switch 2 through the switching switch 14.

[0041] In some preferred embodiments, such as Figure 3 , Figure 4As shown, a pneumatic inlet 16 is provided on the frame 11. The pneumatic foot switch 2 includes a pneumatic input component and a micro switch component 23. The micro switch component 23 is connected to the inside of the pneumatic inlet 16. The pneumatic input component is detachably connected to the micro switch component 23 inside the body 1 through the pneumatic inlet 16 to increase the convenience of disassembly and the flexibility of use.

[0042] In some preferred embodiments, the pneumatic input assembly includes a foot-operated inflation device 21, an air hose connector 22, and an air hose 24. One end of the air hose 24 is connected to the foot-operated inflation device 21, and the other end is connected to the air hose connector 22. The micro switch assembly 23 and the air hose connector 22 are detachably connected by mutually mating threaded joints and nuts or mutually mating snaps and slots, etc., so that the foot-operated inflation device 21 and the air hose 24 can be disassembled together through the air hose connector 22, increasing the convenience of disassembly. At the same time, since the disassembled pneumatic input assembly does not involve electrical safety testing, the inspection procedures are simple, indirectly increasing the convenience of exporting the wire saw machine.

[0043] In some preferred embodiments, such as Figure 5 , Figure 6 As shown, the micro switch assembly 23 includes a positioning connector 231 and a micro switch 233. The touch end of the micro switch 233 is housed in the receiving cavity of the positioning connector 231 and cooperates with the diaphragm provided inside the positioning connector 231. Under the impact of air pressure, the diaphragm provided inside the positioning connector 231 triggers the micro switch 233 to connect or disconnect, thereby adjusting the conductive connection or disconnection of its circuit.

[0044] In some preferred embodiments, the micro switch assembly 23 further includes a limiting member 232, which is sleeved on the outside of the two side walls of the positioning connector 231 and connected to each other by a matching buckle and a slot. The two side walls of the positioning connector 231 have elastic deformation space. The positioning connector 231 is used to provide an inward contraction force to the two side walls of the positioning connector 231. The two sides of the micro switch 233 are in contact with the two side walls of the positioning connector 231 respectively. Under the action of the limiting member 232, the micro switch 233 is firmly limited in the receiving cavity of the positioning connector 231, increasing the tightness of the connection.

[0045] In some preferred embodiments, in order to enable the limiting member 232 to provide better force, the deformation space between the two side walls of the positioning connector 231 can be optimized. The two side walls of the positioning connector 231 extend toward the same end and gradually narrow, and the ends of the two side walls are independent, so that the deformation space between the two side walls of the positioning connector 231 can be adjusted arbitrarily.

[0046] In some preferred embodiments, the micro switch 233 is a normally open micro switch, that is, when it is not pressed, its contacts are in an open state and the circuit is not connected. When the switch is pressed, the contacts close and the circuit is connected. After the switch is released, the contacts open again and the circuit returns to a non-conductive state.

[0047] In some preferred embodiments, the micro switch 233 includes a housing, terminals, and a button that can reset itself after being pressed. The housing has a conductive contact surface. The button acts on an actuating spring inside the housing. When the spring reaches a critical point, it will actuate instantaneously, causing the moving contact of the conductive contact surface to quickly connect or disconnect with the fixed contacts of different terminals. The specific structure is known to those skilled in the art and will not be described further here.

[0048] When the multi-mode switching unit adjusts the motor 10 to the electronic speed control mode, the motor 10 can be started and stopped and its speed controlled simply by controlling the power supply of the body 1 to be connected or disconnected. When the multi-mode switching unit adjusts the motor 10 to the pneumatic speed control mode, the motor 10 will start working simply by pressing the pneumatic foot switch 2. When the pneumatic foot switch 2 is released, the motor 10 will stop working.

[0049] Example 2

[0050] This embodiment is similar in overall structure to Embodiment 1, except that when the pneumatic foot switch 2 acts on the micro switch 233, the specific actions that control the on / off state of the trigger circuit of the micro switch 233 are different.

[0051] In some preferred embodiments, the micro switch 233 is a self-locking micro switch. In the initial state, its contacts are in the open state, but once pressed and released, the contacts will remain in the closed state. To restore the contacts to the initial state, the switch needs to be pressed again.

[0052] Specifically, the micro switch 233 includes a housing, terminals, a locking component, and a button that can reset itself after being pressed. The locking component is a sliding latch or ratchet. When the button is pressed, the locking component is triggered and locked in a designated position, keeping the moving contact in contact with the stationary contact. When the switch is pressed again, the locking component is released, and the moving contact is disconnected from the stationary contact under the action of the spring. The specific structure is known to those skilled in the art and will not be described in further detail here.

[0053] When the multi-mode switching unit adjusts the motor 10 to the electronic speed control mode, the motor 10 can be started and stopped and its speed controlled simply by controlling the power supply of the body 1 to be connected or disconnected. When the multi-mode switching unit adjusts the motor 10 to the pneumatic speed control mode, the motor 10 will start working simply by pressing the pneumatic foot switch 2. When the pneumatic foot switch 2 is pressed again, the motor 10 will stop working.

[0054] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A multi-mode switching unit, disposed between the current output terminal of a power switch and the current input terminal of a speed control circuit, wherein the speed control circuit is used to adjust the speed of a motor, characterized in that, include: The switching module includes a first input terminal, a second input terminal and an output terminal. The first input terminal and the output terminal are directly connected. A pneumatic foot switch (2) is provided between the second input terminal and the output terminal. The output terminal is connected to the current input terminal of the speed control circuit. A switching switch (14) is disposed between the current output terminal of the power switch and the switching module, for selectively connecting the current output terminal to either the first input terminal or the second input terminal.

2. The multi-mode switching unit according to claim 1, characterized in that: It also includes an indicator light (15), the input terminal of which is connected to the second input terminal, and the output terminal of which is connected to the current output terminal of the speed control circuit.

3. The multi-mode switching unit according to claim 1, characterized in that: The switching switch (14) is a slide switch, a toggle switch, or a push-button switch.

4. The multi-mode switching unit according to claim 1, characterized in that: The pneumatic foot switch (2) includes a foot inflation device (21), a micro switch assembly (23), and an air tube (24). The foot inflation device (21) is connected to the micro switch assembly (23) through the air tube (24). Under the action of air pressure, the micro switch assembly (23) is triggered to turn on or off through its internal diaphragm, thereby adjusting the on or off state of its circuit.

5. The multi-mode switching unit according to claim 4, characterized in that: The micro switch assembly (23) includes a positioning connector (231), a limiting member (232), and a micro switch (233). The touch end of the micro switch (233) is housed in a cavity between the two side walls of the positioning connector (231) and cooperates with a diaphragm provided inside the positioning connector (231). There is an elastic deformation space between the two side walls of the positioning connector (231). The two side walls of the positioning connector (231) extend toward the same end and gradually narrow, and the ends of the two side walls are independent. The limiting member (232) is sleeved on the outside of the two side walls of the positioning connector (231) and provides an inward contraction force to the two side walls of the positioning connector (231).

6. The multi-mode switching unit according to claim 5, characterized in that: The micro switch (233) is a normally open micro switch or a self-locking micro switch.

7. A grinding and cutting apparatus, comprising a multi-mode switching unit as described in any one of claims 1 to 6, characterized in that: It also includes a machine body (1), which is any one of a wire saw, polishing machine, belt sander, grinding wheel machine, band saw, or table saw.

8. The grinding and cutting equipment according to claim 7, characterized in that: The body (1) is provided with a pneumatic inlet (16), and the pneumatic foot switch (2) also includes an air pipe connector (22). The foot pedal inflation device (21), the air pipe connector (22), and the air pipe (24) together constitute a pneumatic input component. The micro switch component (23) is connected to the inside of the pneumatic inlet (16). The pneumatic input component is detachably connected to the micro switch component (23) inside the body (1) through the pneumatic inlet (16).

9. The grinding and cutting equipment according to claim 8, characterized in that: The micro switch assembly (23) and the air pipe connector (22) are detachably connected by mutually mating threaded openings and nuts or mutually mating snaps and slots.

10. The grinding and cutting equipment according to claim 7, characterized in that: When the machine body (1) is a wire saw, the machine body (1) also includes a frame (11) and a base (12). The switching switch (14) is located on the outside of the frame (11). A workbench (121) is provided on the upper end of the base (12). A wire saw mechanism (13) is provided on the frame (11). The wire saw mechanism (13) is supported above the workbench (121) by the frame (11). The wire saw (3) is provided with a saw blade support (131) and a saw blade (132). The saw blade (132) is supported by the saw blade support (131). The lower end of the saw blade (132) passes through the wire saw hole of the workbench (121) and is located at the center of the wire saw hole.

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