Coated grinding machine

Abstract

The utility model provides a coating type grinding machine which comprises a shell, a driving motor is arranged on the upper portion of the interior of the shell, grinding wheels are fixedly connected to motor shafts extending from the two ends of the driving motor, a protective shell is arranged on the outer sides of the grinding wheels, and the protective shell is fixedly connected to the shell. A motor shaft is rotationally sleeved with a semicircular wrapping shell, the grinding wheel is wrapped in the wrapping shell, a gear is fixedly connected to one side of the wrapping shell, an action mechanism is arranged on one side of the gear in a matched mode and comprises an electromagnetic push-pull rod, the output end of the electromagnetic push-pull rod is fixedly connected with a rack, and the rack is fixedly connected with the motor shaft. And the rack is meshed with the gear. The coating shell is arranged and matched with the protective shell, so that the safety of polishing operation is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding wheel machines, in particular to a coated grinding wheel machine. Background Art

[0002] A grinding wheel is a common device used to sharpen various knives and tools. It is also used for grinding, deburring and cleaning ordinary small parts. It mainly consists of a base, a grinding wheel, an electric motor or other power source, a bracket, a protective cover and a water supply.

[0003] The existing grinding wheel machine has a relatively simple protective structure, which basically sets a protective cover on the outside of the grinding wheel and exposes part of the grinding wheel for grinding operation. Therefore, the exposed grinding wheel rotates at high speed when the machine is not stopped, which poses a safety hazard. Summary of the Invention

[0004] To address the above-mentioned issues, the present invention discloses an enclosed grinding wheel machine, comprising a housing, a drive motor disposed above the housing, and a motor shaft extending from both ends of the drive motor, each of which is fixedly connected to a grinding wheel. A protective shell is disposed outside the grinding wheel, and the protective shell is fixedly connected to the housing. While the protective shell is provided outside the grinding wheel as a conventional protective measure, the grinding wheels are provided at both ends of the drive motor to ensure force balance on the motor shaft.

[0005] A semicircular outer shell rotates on the motor shaft, and the grinding wheel is enclosed within the outer shell. A gear is fixedly connected to one side of the outer shell, and an actuating mechanism is provided on one side of the gear. Under the white tiger shell, the grinding wheel has an exposed portion, which is used for grinding. However, this exposed portion still poses a risk during grinding, so the outer shell is provided to completely enclose the grinding wheel in conjunction with the protective shell, improving the safety of the device. The actuating mechanism drives the outer shell to rotate.

[0006] The actuating mechanism includes an electromagnetic push-pull rod, the output end of which is fixedly connected to a rack that meshes with a gear. The electromagnetic push-pull rod's movement causes the rack to extend and retract, cooperating with the gear to rotate the covering shell. The electromagnetic push-pull rod offers the advantage of fast response, enabling the covering shell to quickly wrap around the grinding wheel. Furthermore, the electromagnetic push-pull rod can be replaced with other linear motion elements, such as electric cylinders or pneumatic cylinders, depending on actual needs.

[0007] Preferably, counterweights are fixedly connected to both sides of the edge of the covering shell to ensure that the center of gravity of the covering shell is located on the axis of the motor shaft. The overall structure of the counterweights and the covering shell has a relatively stable dynamic balance, which facilitates the rotation of the covering shell with minimal force, thereby reducing the load on the electromagnetic push-pull rod and meeting its rapid response requirements.

[0008] Preferably, the side wall of the electromagnetic push-pull rod is fixedly connected to a bracket, and the end of the bracket is fixedly connected to an electromagnet. The electromagnet is provided with a limiting protrusion with a triangular side profile. The end surface of the rack is provided with a groove, and the limiting protrusion fits into the groove. The setting of the limiting protrusion and groove restricts the movement of the rack, thereby fixing the covering shell, which is in the state of covering the grinding wheel. In addition, the electromagnetic push-pull rod adopts a dual-position retaining type.

[0009] Preferably, the electromagnet includes a base, an armature is movably provided inside the base, the limiting protrusion is fixedly connected to the end of the armature, a spring is sleeved on the armature, and the spring keeps the limiting protrusion extending outward.

[0010] Preferably, a coil is provided inside the base, and one end of the armature is located in the middle of the coil. When the lower coil is energized, the armature moves axially, thereby enabling the limiting protrusion to disengage from the groove, that is, releasing the rack.

[0011] Preferably, a workbench is fixedly connected to the housing, and the workbench is located directly below the grinding wheel. A pressure sensor is installed on the workbench. During operation, a workpiece is placed on the workbench and pressed against the pressure sensor. The upper computer, through logical judgment, controls the electromagnetic push-pull rod and electromagnet to rotate the covering housing to expose the grinding wheel.

[0012] Preferably, a proximity switch and a signal receiving module are provided inside the housing. The grinding machine also includes a signal transmitter fixed to the workpiece or worn on the hand, and the signal transmitter includes a normally open switch and a signal sending module. The proximity switch is used to determine whether there is a workpiece within the operating range, while the signal transmitter is used by the operator to send a signal. When the workpiece is within the operating range and the operator transmits a signal to operate through the signal transmitter, the covering housing rotates to expose the grinding wheel. The use of the signal transmitter improves the safety of the grinding machine.

[0013] Preferably, the proximity switch is one of an eddy current proximity switch, a capacitive proximity switch, a Hall proximity switch, and a photoelectric proximity switch. An appropriate proximity switch can be selected according to actual needs.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. It is equipped with a covering shell and a protective shell to completely wrap the grinding wheel, greatly improving the safety of the grinding operation.

[0016] 2. An action mechanism is provided, and a counterweight is provided on the covering shell, and its center of gravity is coincident with the axis of the motor shaft, so that the electromagnetic push-pull rod can achieve high-response action rack and low-load rotation of the covering shell.

[0017] 3. Equipped with proximity switch and signal transmitter, double protection greatly improves the safety of grinding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front perspective schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the grinding wheel of the present invention;

[0020] Figure 3 is a schematic diagram of the action mechanism of the present invention;

[0021] Figure 4 Schematic diagram of the internal structure of the electromagnet of the present invention.

[0022] List of reference numerals:

[0023] 1. Housing; 2. Protective shell; 3. Workbench; 4. Grinding wheel; 5. Covering shell; 6. Counterweight; 7. Gear; 8. Actuating mechanism;

[0024] 81. Electromagnetic push-pull rod; 82. Bracket; 83. Rack; 84. Electromagnet;

[0025] 841. Limiting protrusion; 842. Spring; 843. Base; 844. Armature; 845. Coil. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively. Example 1

[0027] like Figures 1 to 4 As shown, a coated grinding wheel machine includes a shell 1, a driving motor is arranged on the upper part of the shell 1, and the motor shafts extending from both ends of the driving motor are fixedly connected to the grinding wheel 4. The driving motor is started to drive the grinding wheel 4 to rotate. A protective shell 2 is provided on the outside of the grinding wheel 4, and the protective shell 2 is fixedly connected to the shell 1. The protective shell 2 is a conventional protective measure for the grinding wheel 4.

[0028] A semicircular covering shell 5 is rotatably sleeved on the motor shaft, and the grinding wheel 4 is wrapped inside the covering shell 5. That is, with the protective shell 2, the grinding wheel 4 can be completely enclosed, improving the safety of the grinding operation. A gear 7 is fixedly connected to one side of the covering shell 5, and an action mechanism 8 is provided on one side of the gear 7. That is, when the action mechanism 8 is working, the shell drives the covering shell 5 to rotate.

[0029] The action mechanism 8 includes an electromagnetic push-pull rod 81, and the output end of the electromagnetic push-pull rod 81 is fixedly connected to a rack 83. The rack 83 is engaged with the gear 7. When the electromagnetic push-pull rod 81 works, it drives the rack 83 to extend or retract, and cooperates with the gear 7 to drive the covering shell 5 to rotate. The purpose of using the electromagnetic push-pull rod 81 here is that it has a fast response speed, but its stroke is relatively small. If necessary, a gear reduction group can be added between the rack 83 and the gear 7. In addition, other linear motion elements can be used to replace the battery push-pull rod 81, such as electric cylinders, pneumatic cylinders, etc.

[0030] Counterweights 6 are fixedly connected to both sides of the edge of the covering shell 5 to ensure that the center of gravity of the covering shell 5 is located on the axis of the motor shaft, thereby ensuring the dynamic balance and stability of the covering shell 5 and enabling the covering shell 5 to rotate under a relatively small thrust.

[0031] The side wall of the electromagnetic push-pull rod 81 is fixedly connected to a bracket 82, and the end of the bracket 82 is fixedly connected to an electromagnet 84. The electromagnet 84 is provided with a limiting protrusion 841 with a triangular side profile. The end surface of the rack 83 is provided with a groove, and the limiting protrusion 841 is fitted in the groove. Figure 3 and Figure 4 As shown, during the extension of the rack 83, the upper end of the rack 83 can pass over the limiting protrusion 841 until the groove and the limiting protrusion 841 are matched, thereby fixing the position of the rack 83 and further fixing the covering shell 5.

[0032] The electromagnet 84 includes a base 843, and an armature 844 is movably provided inside the base 843. A limiting protrusion 841 is fixedly connected to the end of the armature 844, that is, the limiting protrusion 841 locks the armature 844 to move. A spring 842 is sleeved on the armature 844, and the spring 842 keeps the limiting protrusion 841 extending outward, which is conducive to cooperation with the groove.

[0033] A coil 845 is provided inside the base 843, and one end of the armature 844 is located in the middle of the coil 845. When the coil 845 is energized, the armature 844 moves axially under the action of the magnetic field, so that the limiting protrusion 841 and the groove are disengaged, that is, the limiting of the rack 83 is cancelled.

[0034] A workbench 3 is fixedly connected to the shell 1, and the workbench 3 is located directly below the grinding wheel 4. During operation, the workpiece is placed on the workbench 3 to provide support. A pressure sensor is provided on the workbench 3. After the workpiece triggers the pressure sensor and transmits it to the host computer, the electromagnetic push-pull rod 81 and the electromagnet 84 can be activated, and the covering shell 5 rotates to expose the grinding wheel 4. If the workpiece is away from the pressure sensor, the covering shell 5 will wrap the grinding wheel 4 again. Example 2

[0035] Based on Example 1, this embodiment is provided with: a proximity switch and a signal receiving module are provided inside the shell 1, the proximity switch is installed in the working area, and is used to determine whether there is a workpiece in the working area. The grinding machine also includes a signal transmitter fixed to the workpiece or worn on the hand, and the signal transmitter sends the signal to the signal receiving module in real time. The signal transmitter includes a normally open switch and a signal sending module. When performing a grinding operation, the operator is required to keep the normally open switch closed, that is, to send a signal to the grinding machine that it can be ground. Specifically, the grinding machine first determines whether there is a workpiece in the working area. If so, it determines whether the signal transmitter sends a signal that it can be ground. If so, the grinding operation can be performed. This setting greatly improves the safety of the grinding operation.

[0036] The proximity switch is one of the following types: eddy current proximity switch, capacitive proximity switch, Hall proximity switch, and photoelectric proximity switch.

[0037] If an eddy current proximity switch is used, it is used for grinding metal workpieces. The coil of the eddy current proximity switch is set in the grinding area. If the workpiece enters the grinding area, the electrical signal on the coil changes, and it can be determined whether there is a workpiece in the grinding area.

[0038] If a capacitive proximity switch is used, two electrode structures are placed on both sides of the grinding area. When the workpiece is located between the two electrode structures, the capacitance of the capacitor changes, and it can be determined whether the workpiece enters the grinding area.

[0039] If it is a Hall proximity switch, it uses polished magnetic material or pre-fixed magnets on the workpiece. When there is a change in the magnetic field in the polished area, it is determined whether there is a workpiece. Furthermore, the Hall proximity switch includes a Hall sensor and a magnet. When the workpiece is located between the Hall sensor and the magnet, the magnetic field is blocked, and the signal on the Hall sensor changes, which can also determine whether there is a workpiece.

[0040] If a photoelectric proximity switch is used, such as an infrared transmitter and an infrared receiver, when the workpiece is located between the two, it is determined whether the workpiece is in the grinding area.

[0041] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A coated grinding wheel machine, comprising a housing (1), wherein a driving motor is arranged above the interior of the housing (1), and motor shafts extending from both ends of the driving motor are fixedly connected to grinding wheels (4), characterized in that: A protective shell (2) is provided on the outer side of the grinding wheel (4), and the protective shell (2) is fixedly connected to the housing (1); A semicircular covering shell (5) is rotatably sleeved on the motor shaft, and the grinding wheel (4) is wrapped inside the covering shell (5). A gear (7) is fixedly connected to one side of the covering shell (5), and an action mechanism (8) is provided on one side of the gear (7). The action mechanism (8) comprises an electromagnetic push-pull rod (81), the output end of the electromagnetic push-pull rod (81) is fixedly connected to a rack (83), and the rack (83) is meshed with the gear (7).

2. The coated grinding wheel machine according to claim 1, characterized in that: Counterweights (6) are fixedly connected to both sides of the edge of the covering shell (5), so that the center of gravity of the covering shell (5) is located on the axis of the motor shaft.

3. The coated grinding wheel machine according to claim 1, characterized in that: The side wall of the electromagnetic push-pull rod (81) is fixedly connected to a bracket (82), the end of the bracket (82) is fixedly connected to an electromagnet (84), and the electromagnet (84) is provided with a limiting protrusion (841) with a triangular side profile. The end face of the rack (83) is provided with a groove, and the limiting protrusion (841) is fitted in the groove.

4. The coated grinding wheel machine according to claim 3, characterized in that: The electromagnet (84) includes a base (843), an armature (844) is movably provided inside the base (843), the limiting protrusion (841) is fixedly connected to the end of the armature (844), a spring (842) is sleeved on the armature (844), and the spring (842) keeps the limiting protrusion (841) extending outward.

5. The coated grinding wheel machine according to claim 4, characterized in that: A coil (845) is provided inside the base (843), and one end of the armature (844) is located in the middle of the coil (845).

6. A coated grinding wheel machine according to any one of claims 1 to 5, characterized in that: A workbench (3) is fixedly connected to the housing (1), and the workbench (3) is located directly below the grinding wheel (4). A pressure sensor is provided on the workbench (3).

7. A coated grinding wheel machine according to any one of claims 1 to 5, characterized in that: A proximity switch and a signal receiving module are provided inside the housing (1); the grinding machine further comprises a signal transmitter fixed to a workpiece or worn on the hand; the signal transmitter comprises a normally open switch and a signal sending module.

8. The coated grinding wheel machine according to claim 7, characterized in that: The proximity switch is one of an eddy current proximity switch, a capacitive proximity switch, a Hall proximity switch, and a photoelectric proximity switch.

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