Student jade carving machine

Abstract

The invention provides a student jade carving machine, comprising a box, a motor, a chuck, a DC power supply, a relay, a switch device and a speed regulating device, wherein the motor, the DC power supply and the relay are arranged in the box, the chuck is placed outside the box, the chuck is connected to the motor, and the chuck is used to clamp a carving tool; the relay is a double-contact relay, the first normally open contact of the relay is connected in series between the positive pole of the DC power supply and the motor, the second normally open contact of the relay is connected in series between the negative pole of the DC power supply and the motor, the coil of the relay is connected in series with the switch device to the DC power supply, and the speed regulating device is connected in series between the relay and the motor for speed regulation of the motor. The student jade carving machine of the invention has simple structure, small volume, light weight, convenient and flexible operation, adjustable speed, enhanced processing adaptability, safe operation, low noise, low cost, and is easy to process and manufacture, providing urgently needed equipment for schools to open jade processing teaching training courses, and improving students' hands-on ability.

Description

Technical Field

[0001] The invention relates to the field of teaching aids, and in particular to a jade carving machine for students. Background Art

[0002] Generally speaking, the engraving equipment used in the domestic jade carving industry is composed of an AC motor with a speed of 2000 rpm, which increases the speed to about 20,000 rpm through a speed increase pulley, and then uses a steel flexible shaft to transmit power to the cutter head, grinding head, etc. Because it is very heavy, it is generally installed on a shelf. Because it is driven by a flexible shaft, it has poor flexibility and the speed cannot be adjusted; another problem of this equipment is that it is very noisy. How to design a jade carving machine dedicated to student teaching that is small in size, light in weight, adjustable in speed, and convenient and flexible in operation is an urgent issue to be solved. Summary of the invention

[0003] In view of the current state of the art, the purpose of the present invention is to provide a student jade carving machine, which has a simple structure, small size, light weight, convenient and flexible operation, adjustable speed, enhanced processing adaptability, safe operation, low cost, and easy processing and manufacturing. To achieve the above purpose, the technical solution of the present invention is as follows:

[0004] A jade carving machine for students comprises a box, a motor, a chuck, a DC power supply, a relay, a switch device and a speed regulating device, wherein the motor, the DC power supply and the relay are arranged in the box, and the chuck is placed outside the box. The chuck is connected to the motor and is used to clamp a carving tool; the relay is a double-contact relay, wherein a first normally open contact of the relay is connected in series between the positive pole of the DC power supply and the motor, and a second normally open contact of the relay is connected in series between the negative pole of the DC power supply and the motor, a coil of the relay is connected in series with the switch device to the DC power supply, and the speed regulating device is connected in series between the relay and the motor for regulating the speed of the motor.

[0005] Preferably, an L-shaped support plate is also provided in the box body, and the L-shaped support plate includes a horizontal plate and a vertical plate connected to the horizontal plate, the horizontal plate and the vertical plate are vertically arranged, the horizontal plate is fixed to the bottom wall of the box body, the vertical plate abuts against the side wall of the box body, and the motor is arranged on the vertical plate.

[0006] Preferably, the student jade carving machine further comprises a fuse, the first normally open contact of the relay and the switch device have a corresponding common end, and the fuse is connected in series between the corresponding common end and the positive pole of the DC power supply.

[0007] Preferably, the DC power supply is a rechargeable battery, and the box is also provided with a charging interface for charging the DC power supply.

[0008] Preferably, the box body includes four side panels and four connecting devices, the four side panels are arranged in a quadrilateral, and two adjacent side panels are connected by the connecting device; the cross-section of the connecting device is a quadrilateral frame structure, having a first side, a second side, a third side and a fourth side connected in sequence, at least two first card slots are provided on the first side, and at least two second card slots are provided on the second side, the number of the first card slots corresponds to the number of the second card slots, the first card slots and the second card slots are used to clamp the side panels, and the second side is also provided with a screw column.

[0009] Furthermore, the box body also includes a bottom plate assembly, which includes a first plate body, a second plate body, a third plate body, a fourth plate body and an intermediate plate body, a first lining plate is arranged on the first plate body, and the first lining plate is fixed to the first plate body by screws, a second lining plate is arranged on the third plate body, and the second lining plate is fixed to the third plate body by screws, the first lining plate, the second plate body, the second lining plate and the fourth plate body are sequentially connected to form a quadrilateral frame, the intermediate plate body is clamped in the quadrilateral frame, the first plate body and the third plate body are symmetrically arranged, the second plate body and the fourth plate body are symmetrically arranged, and first through holes for passing screws are arranged at both ends of the first lining plate, the second plate body, the second lining plate and the fourth plate body.

[0010] Furthermore, the student jade carving machine also includes a screw cover assembly, which includes a first cover plate and a second cover plate, the first cover plate and the second cover plate are rotatably connected, the first cover plate is provided with a second through hole for passing a screw, the first cover plate is also provided with a groove, and the second cover plate is provided with a tongue engaged with the groove, and in the first plate body, the second plate body, the third plate body and the fourth plate body, an avoidance notch is provided between two adjacent plate bodies, and the screw cover assembly is provided at each of the avoidance notches.

[0011] Furthermore, the student jade carving machine also includes a circuit board installed on the box and an LED digital tube installed on the circuit board. A Hall element is arranged on the box, a magnetic steel matching the Hall element is arranged on the shaft of the motor, the Hall element is electrically connected to the circuit board, and the LED digital tube is used to display the rotation speed of the motor.

[0012] Furthermore, the student jade carving machine also includes a transparent outer cover, which is arranged outside the box, and an operation port is arranged on the transparent outer cover. A water receiving trough and a water pump are arranged at the bottom of the transparent outer cover, and the water pump is used to pump water in the water receiving trough to the processed jade.

[0013] Furthermore, the motor is a permanent magnet DC motor.

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

[0015] The student jade carving machine of the present invention has a simple structure, small size, light weight, convenient and flexible operation, adjustable speed, enhanced processing adaptability, low noise, low cost, and is easy to process and manufacture; it adopts low-voltage DC safety voltage, is safe to operate, and provides urgently needed equipment for schools to open jade processing teaching training courses, thereby improving students' hands-on ability. The optimization of the jade carving machine improves the convenience of installation and disassembly, and further enhances safety and reliability; an LED digital tube is provided to make the speed display more intuitive; a transparent cover is provided to effectively ensure the cleanliness of the jade carving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a student jade carving machine of the present invention;

[0017] Figure 2 for Figure 1 The wiring diagram of the student jade carving machine shown;

[0018] Figure 3 A three-dimensional schematic diagram of a connection device of a student jade carving machine according to an embodiment of the present invention;

[0019] Figure 4 for Figure 3 A schematic top view of the connecting device shown;

[0020] Figure 5 A schematic diagram of a bottom plate assembly of a student jade carving machine according to an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a screw cover assembly of a student jade carving machine according to an embodiment of the present invention;

[0022] Figure 7 for Figure 6 A schematic diagram of the structure of the second cover plate of the screw cover assembly cooperating with the connecting plate;

[0023] in:

[0024] 100 students jade carving machine

[0025] 101- box body;

[0026] 1011-first plate; 1012-second plate; 1013-third plate; 1014-fourth plate;

[0027] 1015-middle plate, 1016-first lining plate; 1017-second lining plate;

[0028] 1018-first screw; 1019-second screw; 1020-first through hole;

[0029] 102-motor;

[0030] 103-clip head;

[0031] 104- DC power supply;

[0032] 105-Relay;

[0033] 106- switch device;

[0034] 107-speed regulating device;

[0035] 108-L type support plate;

[0036] 1081- horizontal board; 1082- vertical board; 1083- vertical rod; 1084- pressure board;

[0037] 1085-Butterfly nut;

[0038] 109-Fuse tube;

[0039] 110-connection device;

[0040] 1101-first side; 1102-second side; 1103-third side;

[0041] 1104 - fourth side; 1105 - first card slot; 1106 - second card slot;

[0042] 1107- screw column; 1108- third card slot;

[0043] 111-avoid gap;

[0044] 112-screw cover assembly;

[0045] 1121- first cover plate;

[0046] 11211- protrusion; 11212- second through hole;

[0047] 1122- second cover plate;

[0048] 11221-Tab;

[0049] 1123-connecting plate;

[0050] 11231-first plane; 11232-second plane;

[0051] 1124-rotating shaft;

[0052] 1125-slider;

[0053] 1126-Spring. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the student jade carving machine of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] Reference Figure 1 and Figure 2 The student jade carving machine 100 of one embodiment of the present invention includes a box 101, a motor 102, a clamp 103, a DC power supply 104, a relay 105, a switch device 106 and a speed regulating device 107.

[0056] The motor 102, the DC power supply 104 and the relay 105 are arranged in the box 101, and the clamp 103 is arranged outside the box 101. The clamp 103 can be connected to the shaft of the motor 102 through a coupling, and the clamp 103 is used to clamp the engraving tool. The outline of the box 101 can be a rectangular parallelepiped or a cube, and the box 101 can be made of metal and / or plastic.

[0057] The relay 105 is a double-contact relay, wherein the first normally open contact of the relay 105 is connected in series between the positive pole of the DC power supply 104 and the motor 102, the second normally open contact of the relay 105 is connected in series between the negative pole of the DC power supply 104 and the motor 102, and the coil of the relay 105 is connected in series with the switch device 106 connected to the DC power supply 104. The speed regulating device 107 is connected in series between the relay 105 and the motor 102, and the speed regulating device 107 is used to regulate the speed of the motor 102.

[0058] By adopting the above method, it is convenient to adjust the rotation speed of the student jade carving machine 100, so that the processing adaptability of the jade carving machine 100 is enhanced and it is safer and more reliable.

[0059] In this embodiment, the speed regulating device 107 may be an adjustable resistor, or other speed regulating circuits. The switch device 106 may be a manual switch or a remote control switch. The DC power supply 104 is a rechargeable battery. Figure 2 There are two DC power supplies 104, and the two DC power supplies 104 are arranged in series. To facilitate charging the DC power supply 104, a charging interface for charging the DC power supply 104 can be provided on the box 101. The charging device for charging the DC power supply 104 can be arranged inside the box 101, and can also be placed outside the box 101.

[0060] Figure 2 The first normally open contact of the middle relay 105 and the switch device 106 have a corresponding common terminal, and a fuse 109 is connected in series between the corresponding common terminal and the positive electrode of the DC power supply 104 . Figure 2The common connection point of the wire between the middle switch device 106 and the fuse 109 is the corresponding common terminal. Preferably, a fuse 109 is also arranged in series between the second normally open contact of the relay 105 and the negative pole of the DC power supply 104. In other embodiments, an indicator light may also be arranged in the circuit, and the indicator light is connected in series with the coil of the relay 105.

[0061] The fuse tube 109 is provided so that the student jade carving machine 100 can be powered off automatically when overloaded, and the device is protected in time, which is highly safe. The two fuse tubes 109 are used to further ensure the complete reliability of the student jade carving machine 100. A fuse tube seat can be installed on the box body 101, and the fuse tube 109 can be detachably arranged in the fuse tube seat, so that the fuse tube 109 is convenient to replace.

[0062] Preferably, an L-shaped support plate 108 is further provided in the box 101. The L-shaped support plate 108 includes a horizontal plate 1081 and a vertical plate 1082 connected to the horizontal plate 1081, the horizontal plate 1081 and the vertical plate 1082 are vertically arranged, the horizontal plate 1081 is fixed to the bottom wall of the box 101, the vertical plate 1082 abuts against the side wall of the box 101, the motor 102 is arranged on the vertical plate 1082, and the horizontal plate 1081 and the vertical plate 1082 can be integrally formed. The motor 102 is preferably a permanent magnet DC motor, the working voltage of the motor 102 is DC 12-24V, and the rated speed is 3000 rpm.

[0063] A terminal block and a wire pressing device are also provided in the box 101 to facilitate wiring and fixing of the wires. A scale can also be provided on the speed regulating device 107 to facilitate fine adjustment.

[0064] In other embodiments, Figure 1 As shown, a vertical rod 1083 may be further provided on the horizontal plate 1081, the DC power supply 104 is placed in the box 101, the upper part of the DC power supply 104 is pressed by a pressing plate 1084, a through hole for penetrating the vertical rod 1083 is provided on the pressing plate 1084, and the vertical rod 1083 penetrates the pressing plate 1084 and is screwed on the vertical rod 1083 using a butterfly nut 1085 to fix the DC power supply 104. An insulating pad may be provided between the DC power supply 104 and the box 101, and an insulating pad may also be provided between the DC power supply 104 and the pressing plate 1084. The above method facilitates the installation and fixation of the DC power supply 104.

[0065] As a preferred method, Figure 1 , Figure 3 and Figure 4As shown, the box body 101 includes four side panels and four connecting devices 110. The four side panels are arranged in a quadrilateral, and two adjacent side panels are connected by a connecting device 110. The cross section of the connecting device 110 is a quadrilateral frame structure, having a first side 1101, a second side 1102, a third side 1103 and a fourth side 1104 connected in sequence. At least two first card slots 1105 are provided on the first side 1101, and at least two second card slots 1106 are provided on the second side 1102, and the number of the first card slots 1105 corresponds to that of the second card slots 1106. The first card slot 1105 and the second card slot 1106 are used to clamp the side panels, and the second side 1102 is also provided with a screw column 1107. The screw column 1107 is used to fix the top cover assembly and the bottom plate assembly of the box body 101.

[0066] By providing a plurality of first card slots 1105 and a plurality of second card slots 1106, the volume of the box 101 can be changed as needed, and the production and assembly efficiency is high and the versatility is strong. The box 101 can also be assembled into a multi-layer structure, for example, side panels are installed in at least two first card slots 1105 and at least two second card slots 1106, which can improve the strength of the box 101, enhance the sound insulation effect, and also improve the waterproof effect of the box 101. When the box 101 is a multi-layer structure, sound insulation materials can be filled between the stacked layers of side panels to further improve the sound insulation and waterproof effects of the box 101.

[0067] The box body 101 adopts the above method, which is convenient for installing and disassembling the box body 101. Preferably, a shutter can be further provided on at least one of the side panels, so that the ventilation effect of the box body 101 can be improved.

[0068] The first slot 1105 and the second slot 1106 may both be U-shaped slots or U-shaped slots, and the depths of two adjacent first slots 1105 may be the same or different; the depths of two adjacent second slots 1106 may be the same or different. In other embodiments, a third slot 1108 may be provided on the second side 1102, and the third slot 1108 is a U-shaped slot or a U-shaped slot, and the depth of the third slot 1108 is less than the depth of the second slot 1106. The third slot 1108 is provided, and the depth of the third slot 1108 is less than the depth of the second slot 1106, so that the toughness of the connecting device 110 is improved and it is not easy to break.

[0069] Preferably, if Figure 1 , Figure 4 and Figure 5 As shown, the four side plates and the four connecting devices 110 are supported by the bottom plate assembly of the box body 101. The bottom plate assembly of the box body 101 includes a first plate body 1011, a second plate body 1012, a third plate body 1013, a fourth plate body 1014 and a middle plate body 1015.

[0070] A first lining plate 1016 is disposed on the first plate body 1011 and is fixed to the first plate body 1011 by screws. Figure 5 The first lining plate 1016 is fixed to the first plate body 1011 by four first screws 1018. A second lining plate 1017 is arranged on the third plate body 1013, and the second lining plate 1017 is fixed to the third plate body 1013 by screws. Figure 5 The second lining plate 1017 is fixed to the third plate body 1013 by four first screws 1018. The first lining plate 1016 and the second lining plate 1017 are provided to reduce the processing difficulty of the plate, improve production efficiency and reduce costs.

[0071] The first lining plate 1016, the second plate body 1012, the second lining plate 1017 and the fourth plate body 1014 are connected end to end in sequence to form a quadrilateral frame, and the middle plate body 1015 is clamped in the quadrilateral frame.

[0072] Figure 5 In the embodiment, one end of the first lining plate 1016 ( Figure 5 The first end (upper middle end) of the second plate 1012 is fixed with two second screws 1019 Figure 5 The other end of the first liner 1016 ( Figure 5 The middle and lower ends) are fixed to the first end ( Figure 5 middle left end); one end of the second lining plate 1017 ( Figure 5 The second end (upper middle end) of the second plate 1012 is fixed with two second screws 1019 Figure 5 The other end of the second lining plate 1017 ( Figure 5 The middle and lower ends) are fixed to the second end ( Figure 5 center right).

[0073] Among them, the first lining plate 1016, the second plate body 1012, the second lining plate 1017 and the fourth plate body 1014 all have card grooves. After the first lining plate 1016, the second plate body 1012, the second lining plate 1017 and the fourth plate body 1014 are assembled into a quadrilateral frame, the card grooves on the first lining plate 1016, the second plate body 1012, the second lining plate 1017 and the fourth plate body 1014 form an annular groove, and the middle plate body 1015 is clamped in the annular groove, thereby realizing reliable fixation of the middle plate body 1015 and facilitating installation and disassembly.

[0074] Preferably, the first plate body 1011 and the third plate body 1013 are symmetrically arranged, and the second plate body 1012 and the fourth plate body 1014 are symmetrically arranged. Figure 5In the embodiment, the first plate 1011 and the third plate 1013 are symmetrically arranged, the second plate 1012 and the fourth plate 1014 are symmetrically arranged, and the first lining plate 101 and the second lining plate 1017 are symmetrically arranged. Both ends of the first lining plate 1016, the second plate 1012, the second lining plate 1017 and the fourth plate 1014 are provided with first through holes 1020 for passing screws. The first lining plate 1016, the second plate 1012, the second lining plate 1017 and the fourth plate 1014 are connected by screws, which is convenient for installation and disassembly, and also ensures the strength of the bottom plate assembly. When assembling the box body 101, screws are passed through the first through holes 1020 and then tightened on the screw columns 1107, thereby achieving the fixing of the above-mentioned bottom plate assembly.

[0075] The top cover assembly of the box body 101 can adopt the same structure as the above-mentioned bottom plate assembly, which will not be described in detail here. The top cover assembly is also fixed by screwing screws on the screw column 1107, wherein the lower end of the screw column 1107 is used to fix the bottom plate assembly, and the upper end of the screw column 1107 is used to fix the top cover assembly. Since the top cover assembly adopts the same structure as the bottom plate assembly, it also achieves the same beneficial technical effect.

[0076] like Figure 1 , Figures 5 to 7 As shown, the box body 101 also includes a screw cover assembly 112. The screw cover assembly 112 is mainly used to cover the screws, and the screw cover assembly 112 includes a first cover plate 1121 and a second cover plate 1122. The first cover plate 1121 and the second cover plate 1122 are rotatably connected. Figure 6 The first cover plate 1121 has a protrusion 11211, and the second cover plate 1122 is provided with a connecting plate 1123. The connecting plate 1123 and the protrusion 11211 are rotatably connected through a rotating shaft 1124, so that the first cover plate 1121 can rotate relative to the second cover plate 1122. The second cover plate 1122 and the connecting plate 1123 are preferably integrally formed. The first cover plate 1121 is provided with a second through hole 11212 for inserting a screw, and the first cover plate 1121 is also provided with a groove, which serves as a card slot, and the second cover plate 1122 is provided with a card tongue 11221 engaged with the groove. The screw cover assembly 112 is made of plastic material by injection molding.

[0077] Preferably, the screw cover assembly 112 further includes a slider 1125 and a spring 1126. The slider 1125 is placed on the first cover plate 1121, and the slider 1125 has an inclined surface. The small end of the slider 1125 is the head end, and the large end of the slider 1125 is the tail end. The tail end of the slider 1125 is provided with a spring 1126, and the spring 1126 is in a compressed state. The spring 1126 can be fixedly arranged on the first cover plate 1121. The end of the connecting plate 1123 away from the second cover plate 1122 has a first plane 11231 and a second plane 11232. The first plane 11231 and the second plane 11232 are perpendicular to each other. When the first plane 11231 cooperates with the inclined surface of the slider 1125, the second cover plate 1122 is in an open state. When the second plane 11232 cooperates with the inclined surface of the slider 1125, the second cover plate 1122 is in a closed state.

[0078] A slider 1125 and a spring 1126 are provided. The slider 1125 cooperates with the connecting plate 1123 so that the second cover plate 1122 can stay in a fixed position in both the open state and the closed state, and the difficulty of opening the second cover plate 1122 is increased, so that the screws can be better protected.

[0079] In other embodiments, the end of the connecting plate 1123 away from the second cover plate 1122 may have multiple sections of planes connected in sequence, and the multiple sections of planes connected in sequence are respectively used to cooperate with the inclined surface of the slider 1125; among the multiple sections of planes connected in sequence, the outermost two sections of planes are perpendicular to each other. The first cover plate 1121 may also be provided with a support foot perpendicular to the first cover plate 1121, and the support foot can serve as the bottom foot of the box body 101.

[0080] In the first plate 1011, the second plate 1012, the third plate 1013 and the fourth plate 1014, a clearance gap 111 is provided between two adjacent plates, and a screw cover assembly 112 is provided at each clearance gap 111. That is, a clearance gap 111 is provided between the first plate 1011 and the second plate 1012, a clearance gap 111 is provided between the second plate 1012 and the third plate 1013, a clearance gap 111 is provided between the third plate 1013 and the fourth plate 1014, and a clearance gap 111 is provided between the fourth plate 1014 and the first plate 1011. Among them, the second through hole 11212 corresponds to the first through hole 1020.

[0081] The screw cover assembly 112 is set so that the second cover plate 1122 can only stay in the open position or the closed position, so that the second cover plate 1122 can achieve the fixed position of opening and closing, which is convenient for installation and disassembly, improves production efficiency, reduces costs, achieves effective protection of the screws, and also plays an insulating role. The protrusion 11211, the connecting plate 1123, the slider 1125 and the spring 1126 can be designed into two groups, and the two groups are symmetrically arranged. That is, the number of the protrusion 11211, the connecting plate 1123, the slider 1125 and the spring 1126 is two. This further improves the reliability of the screw cover assembly 112 and makes the second cover plate 1122 open and close more smoothly.

[0082] As a preferred method, the student jade carving machine also includes a circuit board installed on the box 101 and an LED digital tube installed on the circuit board. A Hall element is arranged on the box 101, and a magnetic steel matched with the Hall element is arranged on the shaft of the motor 102. The Hall element is electrically connected to the circuit board. The LED digital tube is used to display the rotation speed of the motor 102. The LED digital tube can also be replaced by a liquid crystal display element. The use of a Hall sensor to obtain a pulse signal can make its mechanical structure relatively simple. As long as a magnetic steel is embedded on the circumference of the rotating shaft of the motor 102 and the Hall element is close to the magnetic steel, there will be a signal output. When the rotating shaft rotates, a pulse signal output will be continuously generated. This sensor has good dust and oil resistance.

[0083] As another preferred embodiment, the student jade carving machine 100 further includes a transparent outer cover, which is arranged outside the box 101, and an operation port is arranged on the transparent outer cover. A water receiving tank and a water pump are arranged at the bottom of the transparent outer cover, and the water pump is used to pump water in the water receiving tank to the processed jade. Preferably, a filter screen is also arranged on the water receiving tank. A regulating valve can also be arranged on the water pump to change the water flow size.

[0084] The student jade carving machine 100 of the above embodiments has a simple structure, small size, light weight, convenient and flexible operation, adjustable speed, enhanced processing adaptability, low noise, low cost, and is easy to process and manufacture; it adopts low-voltage DC safety voltage, safe operation, and provides much-needed equipment for schools to open jade processing teaching training courses, thereby improving students' hands-on ability. The optimization of the jade carving machine improves the convenience of installation and disassembly, further enhances safety and reliability, sets an LED digital tube, makes the speed display more intuitive, and sets a transparent cover to effectively ensure the cleanliness of the jade carving operation. It should be noted that, in the absence of conflict, the above embodiments and the features in the embodiments can be combined with each other.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A student jade carving machine, characterized in that, The invention comprises a housing (101), a motor (102), a clamp (103), a DC power supply (104), a relay (105), a switch device (106) and a speed regulating device (107); the motor (102), the DC power supply (104) and the relay (105) are arranged in the housing (101); the clamp (103) is arranged outside the housing (101); the clamp (103) is connected to the motor (102); the clamp (103) is used to clamp the engraving tool; the relay (105) is a double-contact relay The first normally open contact of the relay (105) is connected in series between the positive electrode of the DC power supply (104) and the motor (102), the second normally open contact of the relay (105) is connected in series between the negative electrode of the DC power supply (104) and the motor (102), the coil of the relay (105) is connected in series with the switch device (106) connected to the DC power supply (104), and the speed regulating device (107) is connected in series between the relay (105) and the motor (102) for regulating the speed of the motor (102); The box body (101) comprises two groups of side panels and four connecting devices (110), each group of side panels comprises four side panels, the four side panels are arranged in a quadrilateral, and two adjacent side panels are connected by the connecting device (110); the cross section of the connecting device (110) is a quadrilateral frame structure, having a first side (1101), a second side (1102), a third side (1103) and a fourth side (1104) connected in sequence, and the first side (1101) is provided with at least two first card slots (1105), at least two second card slots (1106) are arranged on the second side (1102), the number of the first card slots (1105) corresponds to the number of the second card slots (1106), the first card slots (1105) and the second card slots (1106) are used to clamp the side panels, the side panels are installed in the two first card slots 1105 and the two second card slots 1106, so that the box body 101 has a double-layer structure, and sound insulation material is also filled between the layers of the stacked side panels; A third slot (1108) is also provided on the second side (1102); the third slot (1108) is a U-shaped slot or a quasi-U-shaped slot; the depth of the third slot (1108) is less than the depth of the second slot (1106); the second side (1102) is also provided with a screw column (1107); The box body (101) further comprises a bottom plate assembly, wherein the bottom plate assembly comprises a first plate body (1011), a second plate body (1012), a third plate body (1013), a fourth plate body (1014) and an intermediate plate body (1015); a first lining plate (1016) is arranged on the first plate body (1011), and the first lining plate (1016) is fixed to the first plate body (1011) by screws; a second lining plate (1017) is arranged on the third plate body (1013), and the second lining plate (1017) is fixed to the third plate body (1013) by screws; the first lining plate (1016), the second plate body (1012), the second lining plate (1017) and The fourth plate body (1014) is sequentially connected to form a quadrilateral frame, the middle plate body (1015) is clamped in the quadrilateral frame, the first plate body (1011) and the third plate body (1013) are symmetrically arranged, the second plate body (1012) and the fourth plate body (1014) are symmetrically arranged, and both ends of the first lining plate (1016), the second plate body (1012), the second lining plate (1017) and the fourth plate body (1014) are provided with first through holes (1020) for passing screws; when assembling the box body (101), screws are passed through the first through holes (1020) and then tightened on the screw columns (1107), thereby achieving the fixation of the bottom plate assembly; The screw cover assembly (112) further comprises a first cover plate (1121) and a second cover plate (1122), wherein the first cover plate (1121) and the second cover plate (1122) are rotatably connected, the first cover plate (1121) is provided with a second through hole (11212) for inserting a screw, the first cover plate (1121) is also provided with a groove, the second cover plate (1122) is provided with a tongue (11221) engaged with the groove, and in the first plate body (1011), the second plate body (1012), the third plate body (1013) and the fourth plate body (1014), a avoidance notch (111) is provided between two adjacent plates, and the screw cover assembly (112) is provided at each avoidance notch (111); The screw cover assembly (112) further comprises a slider (1125) and a spring (1126). The slider (1125) is placed on the first cover plate (1121). The slider (1125) has an inclined surface. The small end of the slider (1125) is the head end, and the large end of the slider (1125) is the tail end. The spring (1126) is arranged at the tail end of the slider (1125). The spring (1126) is in a compressed state. One end of the cover plate (1122) has a first plane (11231) and a second plane (11232), the first plane (11231) and the second plane (11232) are perpendicular to each other, when the first plane (11231) cooperates with the inclined surface of the slider (1125), the second cover plate (1122) is in an open state, when the second plane (11232) cooperates with the inclined surface of the slider (1125), the second cover plate (1122) is in a closed state.

2. The student jade carving machine according to claim 1, characterized in that: An L-shaped support plate (108) is also arranged in the box body (101), and the L-shaped support plate (108) comprises a horizontal plate (1081) and a vertical plate (1082) connected to the horizontal plate (1081), the horizontal plate (1081) and the vertical plate (1082) are arranged vertically, the horizontal plate (1081) is fixed to the bottom wall of the box body (101), the vertical plate (1082) abuts against the side wall of the box body (101), and the motor (102) is arranged on the vertical plate (1082).

3. The student jade carving machine according to claim 1, characterized in that: It also includes a fuse (109), the first normally open contact of the relay (105) and the switch device (106) have a corresponding common end, and the fuse (109) is connected in series between the corresponding common end and the positive electrode of the DC power supply (104).

4. The student jade carving machine according to claim 1, characterized in that: The DC power source (104) is a rechargeable battery, and the box (101) is also provided with a charging interface for charging the DC power source (104).

5. The student jade carving machine according to any one of claims 1 to 4, characterized in that: It also includes a circuit board mounted on the housing (101) and an LED digital tube mounted on the circuit board. A Hall element is arranged on the housing (101). A magnetic steel matching the Hall element is arranged on the shaft of the motor (102). The Hall element is electrically connected to the circuit board. The LED digital tube is used to display the rotation speed of the motor (102).

6. The student jade carving machine according to any one of claims 1 to 4, characterized in that: It also comprises a transparent outer cover, which is arranged outside the box body (101), an operation port is arranged on the transparent outer cover, and a water receiving trough and a water pump are arranged at the bottom of the transparent outer cover, and the water pump is used to pump water in the water receiving trough to the processed jade.

7. The student jade carving machine according to any one of claims 1 to 4, characterized in that: The motor (102) is a permanent magnet DC motor.

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