Motor suitable for stone cutting

Abstract

The utility model discloses a motor suitable for stone cutting. The motor comprises a shell, a rotor and a stator, wherein the rotor and the stator are arranged in the shell; the shell comprises a front end cover, a base and a rear end cover; a rotating shaft is arranged on the rotor; the rotating shaft is provided with a cutting blade clamping device, the cutting blade clamping device comprises a front chuck and a rear chuck, and the rear chuck is provided with a water stop groove; a limiting ring is arranged on the rotating shaft; the base is provided with a through hole, and the front end cover is provided with a water inlet hole. A drain hole is formed in the rear end cover; and a cooling fan is arranged in the rear end cover. The motor suitable for stone cutting adopts a specific structure, when the motor is used for stone cutting, cooling water can be prevented from entering the motor, and the problems of oxidation and corrosion of metal parts, aging of insulating materials and the like are avoided, so that the loss of the motor is reduced, and the service life of the motor is remarkably prolonged; moreover, the probability of short circuit and electric leakage caused by water inflow is reduced, and the safety of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor suitable for stone cutting. Background Technology

[0002] Natural stone (such as marble, granite, and quartz) is widely used in construction, home decoration, and art products due to its unique texture, durability, and decorative properties. However, natural stone requires multiple processing steps (such as cutting, grinding, polishing, and surface treatment) before it can be transformed into usable slabs or components. Currently, stone processing typically relies on cutting machines.

[0003] When processing stone, cutting machines often require water spraying for cooling and dust removal. For example, Chinese patent (CN213005949 U) discloses a marble cutting machine for municipal park road construction, which includes a worktable, a filter plate, and a second water tank. A bracket is fixedly installed on the left side of the worktable, and a control switch is fixedly installed on the left side of the bracket. A cylinder is fixedly installed on the upper right side of the bracket, and a fixing plate is fixedly installed on the lower end of the cylinder. A motor is fixedly installed on the lower end of the fixing plate, and a transmission rod is fixedly installed on the right side of the motor. The control switch controls the cylinder to work with the motor to cut the marble. Simultaneously, the control switch activates a second water pump, which sprays water onto the marble through a third conduit and a nozzle.

[0004] Motors often suffer performance damage due to the seepage of cooling water in the working environment. Water can easily penetrate the internal structure through gaps in the drive shaft and joints in the motor housing. Especially when the cutting machine runs for a long time or is subjected to high-pressure water washing, the motor seals are prone to aging and failure. Water contact with live parts can cause safety hazards such as short circuits and leakage. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a motor suitable for stone cutting. The stone-cutting motor of this application employs a specific structure that prevents cooling water from entering the motor during stone cutting, avoiding problems such as oxidation and corrosion of metal parts and aging of insulation materials, thereby reducing motor wear and significantly extending the motor's service life; it also reduces the probability of short circuits and leakage caused by water ingress, improving the motor's safety.

[0006] The technical solution of this application is as follows:

[0007] A motor suitable for stone cutting includes a housing and a rotor and stator disposed inside the housing; the housing includes a front cover, a base, and a rear cover; a rotating shaft is provided through the rotor, one end of the rotating shaft extending out of the front cover and the other end extending out of the rear cover; a cutting blade clamping device is provided at the end of the rotating shaft extending out of the front cover, the cutting blade clamping device including a front clamping plate and a rear clamping plate in sequence, the rear clamping plate having a water-stop groove at the end near the front cover; a limiting ring is provided on the rotating shaft between the rear clamping plate and the front cover for limiting the cutting blade clamping device; a set of axial through holes is provided on the base, and a set of water inlets is provided on the front cover accordingly; a set of radial drain holes is provided on the rear cover; a cooling fan is provided inside the rear cover.

[0008] Compared with the prior art, the stone cutting motor of this application has a water-stop groove on the cutting blade clamping device near the front end cover, which can intercept and guide the sprayed cooling water to drip radially, preventing it from directly seeping into the motor. In addition, a set of water inlets is provided on the front end cover and a set of axial through holes are provided on the base, so that the splashed cooling water can enter from the water inlets, go through the through holes to the rear end cover, and be discharged from the drain hole under the action of the cooling fan. This not only prevents the cooling water from entering the motor and damaging the parts, but also provides water cooling for the base. This reduces the probability of short circuit and leakage caused by water ingress into the motor, and improves the safety and service life of the motor.

[0009] As an optimization, in the aforementioned motor suitable for stone cutting, the front end cover is provided with a first annular sealing surface, and the rear clamping plate is provided with a second annular sealing surface. Both the first and second annular sealing surfaces are composed of multiple concentric annular bosses, forming an interlocking sealing structure. An annular groove is formed between adjacent annular bosses, with gaps between the sides of the annular bosses and the sides of the annular grooves, and gaps between the ends of the annular bosses and the bottom of the annular grooves. This structure uses the first and second annular sealing surfaces in conjunction to form a sealing structure. The sealing principle is that the gap between the bottom of the annular groove and the end of the annular boss forms a cavity. During shaft rotation, the first annular sealing surface remains relatively stationary, while the second annular sealing surface rotates relatively. When gas tries to enter the cavity from the outside, its volume is compressed, increasing the pressure. Since the gas flow direction is mostly from high pressure to low pressure, it is difficult for outside gas to enter the inner cavity. Consequently, splashing cooling water cannot enter the motor through the gaps, further improving the motor's reliability.

[0010] As an optimization, in the aforementioned motor suitable for stone cutting, the gap between the end of the annular boss and the bottom of the annular groove is 2-3 mm, and the gap between the side of the annular boss and the side of the adjacent annular groove is 0.5-1.5 mm. If the gap between adjacent sides is too large, the sealing effect is poor; if the gap between adjacent sides is too small, friction will occur at the seal when the relatively rotating parts vibrate or bend. Experiments have verified that the above-mentioned gaps are the optimal size ratio.

[0011] As an optimization, in the aforementioned motor suitable for stone cutting, heat dissipation fins are provided in the through-hole. The heat dissipation fins increase the surface area of ​​the housing, allowing more heat to dissipate through air convection, thereby improving the motor's heat dissipation efficiency.

[0012] As an optimization, in the aforementioned motor suitable for stone cutting, the cutting blade clamping device is locked to the rotating shaft by a nut. This structure facilitates the disassembly, assembly, and adjustment of the clamping force of the cutting blade clamping device.

[0013] As an optimization, in the aforementioned motor suitable for stone cutting, the front chuck is provided with a first friction groove, and the rear chuck is provided with a corresponding second friction groove. This structure reduces the contact area between the cutting blade and the front and rear chucks when clamping the cutting blade, weakens the influence of the machining accuracy of the clamping surface of the chuck on the clamping force, increases the friction coefficient between the clamping surfaces, and makes the cutting blade easier to be clamped by the cutting blade clamping device.

[0014] As an optimization, in the aforementioned motor suitable for stone cutting, the depth of the first and second friction grooves is 1-2 mm, and the groove width is 1-2 mm. Experimental verification shows that the above dimensional ratio facilitates processing and provides a sufficient coefficient of friction during clamping.

[0015] As an optimization, in the aforementioned motor suitable for stone cutting, the front and rear clamping plates are fitted with a clearance fit to the rotating shaft. This structure facilitates the assembly and disassembly of the front and rear clamping plates.

[0016] As an optimization, in the aforementioned motor suitable for stone cutting, the cooling fan is an axial fan. Axial fans can generate a large airflow while maintaining a certain air pressure, resulting in better heat dissipation; moreover, axial fans have a compact structure, are easy to install, and operate with low noise. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a motor suitable for stone cutting according to this application;

[0018] Figure 2 yes Figure 1 A cross-sectional view;

[0019] Figure 3 yes Figure 1 Schematic diagram of the front end cap structure;

[0020] Figure 4 yes Figure 1 Schematic diagram of the middle frame;

[0021] Figure 5 yes Figure 1 Schematic diagram of the middle and rear end caps;

[0022] Figure 6 yes Figure 1 A schematic diagram of the middle and rear clamping disc.

[0023] The markings in the attached diagram are as follows: 1-shell, 11-front end cover, 111-water inlet, 112-first annular sealing surface, 12-base, 121-through hole, 122-heat dissipation fin, 13-rear end cover, 131-drain hole; 2-rotor; 3-stator; 4-shaft; 5-blade clamping device, 51-front clamp, 511-first friction groove, 52-rear clamp, 521-water stop groove, 522-second annular sealing surface, 523-second friction groove; 6-limiting ring; 7-cooling fan; 8-nut. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. In the following embodiments, content not described in detail or shown in detail in the accompanying drawings is common knowledge in the art.

[0025] Example (see) Figures 1-6 ):

[0026] A motor suitable for stone cutting includes a housing 1 and a rotor 2 and a stator 3 disposed inside the housing 1. The housing 1 includes a front cover 11, a base 12, and a rear cover 13. A rotating shaft 4 is provided through the rotor 2, with one end of the rotating shaft 4 extending out of the front cover 11 and the other end extending out of the rear cover 13. A cutting blade clamping device 5 is provided at the end of the rotating shaft 4 extending out of the front cover 11. The cutting blade clamping device 5 includes a front clamping plate 51 and a rear clamping plate 52 in sequence. A water-stop groove 521 is provided at the end of the rear clamping plate 52 near the front cover 11. A limiting ring 6 is provided on the rotating shaft 4 and located between the rear clamping plate 52 and the front cover 11 to limit the cutting blade clamping device 5. A set of axial through holes 121 is provided on the base 12, and a set of water inlets 111 is provided on the front cover 11. A set of radial drain holes 131 is provided on the rear cover 13. A cooling fan 7 is provided inside the rear cover 13.

[0027] In this embodiment, the front end cover 11 is provided with a first annular sealing surface 112, and the rear clamp 52 is provided with a second annular sealing surface 522; both the first annular sealing surface 112 and the second annular sealing surface 522 are composed of multiple concentric annular bosses, and the annular bosses of the first annular sealing surface 112 and the annular bosses of the second annular sealing surface 522 form an interlocking sealing structure; an annular groove is formed between adjacent annular bosses, and there is a gap between the side of the annular boss and the side of the annular groove, and there is a gap between the end of the annular boss and the bottom of the annular groove. This structure uses a first annular sealing surface 112 and a second annular sealing surface 522 to form a sealing structure. The sealing principle is that the gap between the bottom of the annular groove and the end of the annular boss forms a cavity. During the rotation of the shaft 4, the first annular sealing surface 112 is relatively stationary, while the second annular sealing surface 522 rotates relatively. When the gas passes through the outside and wants to enter the cavity, its volume will be compressed, causing the pressure to increase. Since the gas flow direction is mostly from high pressure to low pressure, it is difficult for the outside gas to enter the inner cavity. As a result, the splashed cooling water cannot enter the motor through the gap, further improving the reliability of the motor.

[0028] In this embodiment, the gap between the end of the annular boss and the bottom of the annular groove is 2mm, and the gap between the side of the annular boss and the side of the adjacent annular groove is 1mm. If the gap between adjacent sides is too large, the sealing effect will be poor; if the gap between adjacent sides is too small, friction will occur at the seal when the relatively rotating part vibrates or bends. Experiments have verified that the above-mentioned gaps are the optimal size ratio.

[0029] In this embodiment, a heat dissipation fin 122 is provided in the through hole 121. The heat dissipation fin 122 increases the surface area of ​​the housing, allowing more heat to dissipate through air convection, thereby improving the motor's heat dissipation efficiency.

[0030] In this embodiment, the cutting blade clamping device 5 is locked to the rotating shaft 4 by a nut 8. This structure facilitates the disassembly, assembly, and adjustment of the clamping force of the cutting blade clamping device 5.

[0031] In this embodiment, the front chuck 51 is provided with a first friction groove 511, and the rear chuck 52 is provided with a corresponding second friction groove 523. This structure reduces the contact area between the cutting blade and the front chuck 51 and the rear chuck 52 when clamping the cutting blade, weakens the influence of the machining accuracy of the clamping surface of the chuck on the clamping force, increases the friction coefficient between the clamping surfaces, and makes it easier for the cutting blade to be clamped by the cutting blade clamping device 5.

[0032] In this embodiment, the depth of the first friction groove 511 and the second friction groove 523 is 2mm, and the groove width of the first friction groove 511 and the second friction groove 523 is 2mm. Experimental verification shows that the above dimensional ratio is convenient for processing and provides a sufficient coefficient of friction during clamping.

[0033] In this embodiment, the front clamping plate 51, the rear clamping plate 52, and the rotating shaft 4 are fitted with a clearance. This structure facilitates the assembly and disassembly of the front clamping plate 51 and the rear clamping plate 52.

[0034] In this embodiment, the cooling fan 7 is an axial fan. Axial fans can generate a large airflow while maintaining a certain air pressure, resulting in good heat dissipation; moreover, axial fans have a compact structure, are easy to install, and produce less noise during operation.

[0035] When the motor suitable for stone cutting in this embodiment is working, the water-stop groove 521 on the rear clamp 52 can intercept and guide the sprayed cooling water to drip radially, preventing it from directly seeping into the motor. Furthermore, the rear clamp 52 and the front cover 11 are sealed by a multi-layer annular boss, preventing the cooling water from entering the motor through the gap. In addition, the splashed cooling water can enter from the water inlet 111 and go through the through hole 121 to the rear cover 13, and under the action of the cooling fan 7, it can be discharged from the drain hole 121. This not only prevents the cooling water from entering the motor and damaging the parts, but also cools the base 12 with water.

[0036] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this application.

Claims

1. A motor suitable for stone cutting, comprising a housing (1) and a rotor (2) and a stator (3) disposed inside the housing (1); the housing (1) comprising a front cover (11), a base (12) and a rear cover (13); characterized in that: A rotating shaft (4) is provided through the rotor (2). One end of the rotating shaft (4) extends out of the front end cover (11), and the other end extends out of the rear end cover (13). A cutting blade clamping device (5) is provided at the end of the rotating shaft (4) extending out of the front end cover (11). The cutting blade clamping device (5) includes a front clamping plate (51) and a rear clamping plate (52) in sequence. A water-stop groove (521) is provided at the end of the rear clamping plate (52) near the front end cover (11). A limiting ring (6) is provided on the rotating shaft (4) and between the rear clamping plate (52) and the front end cover (11) to limit the cutting blade clamping device (5). A set of axial through holes (121) is provided on the base (12), and a set of water inlets (111) is provided on the front end cover (11). A set of radial drain holes (131) is provided on the rear end cover (13). A cooling fan (7) is provided inside the rear end cover (13).

2. The motor suitable for stone cutting according to claim 1, characterized in that: The front end cover (11) is provided with a first annular sealing surface (112), and the rear clamp (52) is provided with a second annular sealing surface (522). The first annular sealing surface (112) and the second annular sealing surface (522) are both composed of multiple concentric annular bosses. The annular bosses of the first annular sealing surface (112) and the annular bosses of the second annular sealing surface (522) form an interlocking sealing structure. An annular groove is formed between adjacent annular bosses. There is a gap between the side of the annular boss and the side of the annular groove. There is a gap between the end of the annular boss and the bottom of the annular groove.

3. The motor suitable for stone cutting according to claim 2, characterized in that: The gap between the end of the annular boss and the bottom of the annular groove is 2-3 mm, and the gap between the side of the annular boss and the side of the adjacent annular groove is 0.5-1.5 mm.

4. The motor suitable for stone cutting according to claim 3, characterized in that: The through hole (121) is provided with heat dissipation fins (122).

5. Motor suitable for cutting stone material according to any one of claims 1-4, characterized in that: The cutting blade clamping device (5) is locked onto the rotating shaft (4) by a nut (8).

6. The motor suitable for stone cutting according to claim 5, characterized in that: The front chuck (51) is provided with a first friction groove (511), and the rear chuck (52) is provided with a corresponding second friction groove (523).

7. The motor suitable for stone cutting according to claim 6, characterized in that: The depth of the first friction groove (511) and the second friction groove (523) is 1-2 mm, and the groove width of the first friction groove (511) and the second friction groove (523) is 1-2 mm.

8. The motor suitable for stone cutting according to claim 7, characterized in that: The front clamping plate (51), the rear clamping plate (52), and the rotating shaft (4) are in clearance fit.

9. The motor suitable for stone cutting according to claim 8, characterized in that: The cooling fan (7) is an axial flow fan.

Images