Cutting machine with built-in active water mist cooling and dust falling system

Abstract

The invention relates to a cutting machine with a built-in active water mist cooling dust fall system. The cutting machine comprises a machine body, a motor arranged in the machine body, a gear transmission chain installed at the front end of the machine body, a cutting blade in transmission connection with the output end of the motor through the gear transmission chain, and a protective cover connected with the front end of the machine body and arranged on the outer side of the cutting blade. Wherein a water supply pipeline connected with an external water source and a water pumping device are arranged on the machine body, and the water pumping device is installed on the machine body and driven by a transmission shaft in the gear transmission chain. The power input end of the water pumping device is connected with the gear transmission chain of the cutting machine, so that the water pumping device is synchronously driven by the main motor through mechanical transmission, when the motor is started, the cutting blade and the water pumping device operate at the same time, water mist is synchronously sprayed out at the moment when the cutting action starts, the dust falling state is effectively improved, and the dust suppression effect is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, and in particular to a cutting machine with a built-in active water mist cooling and dust suppression system. Background Technology

[0002] In construction, stone processing, and decoration projects, various handheld or benchtop cutting machines are widely used for cutting hard materials such as brick walls, concrete, stone, tiles, and floors. However, during the high-speed rotating cutting blade's cutting process, a large amount of fine dust particles are inevitably generated. This dust not only seriously pollutes the working environment, reduces visibility, and affects operational accuracy, but also harms the respiratory system of operators. Long-term exposure may lead to occupational diseases such as pneumoconiosis. In addition, some combustible dusts (such as aluminum powder) also pose an explosion risk, further threatening operational safety.

[0003] To address the aforementioned issues, existing technologies commonly employ wet dust suppression methods, which involve spraying water mist onto the cutting area to inhibit dust dispersion. Currently, handheld cutting machines primarily use small electric water pumps, powered by an external power source to drive a larger pump for pressurized water supply, achieving a degree of active spraying. However, such systems typically require additional batteries or external power connections, increasing the size and weight of the equipment and disrupting the original compact structure of the cutting machine. Furthermore, the multi-power source design increases energy consumption and failure rates, and the pump's asynchronous operation with the cutting motion still results in issues such as start-up delays and flow rate mismatches. None of the aforementioned technical solutions fundamentally solve the problem of coordination between the dust suppression system and the cutting motion. Because the water supply system is independent of the main drive system, its start / stop and flow rate adjustment cannot be synchronized with changes in the cutting load in real time. This leads to situations where "dust rises before water arrives" or "water is plentiful but dust has already dispersed," resulting in a severe mismatch in dust suppression timing, especially at the moment of cutting start or changes in cutting depth. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art by providing a cutting machine with a built-in active water mist cooling dust reduction system to solve the dust pollution problem generated by existing cutting machines during the cutting process and improve the cleanliness and safety of the working environment.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: This cutting machine with a built-in active water mist cooling and dust reduction system includes a machine body, a motor installed in the machine body, a gear transmission chain installed at the front end of the machine body, a cutting blade that is connected to the output end of the motor through the gear transmission chain, and a protective cover that is connected to the front end of the machine body and installed on the outside of the cutting blade. The machine body is equipped with a water supply pipeline and a water pumping device connected to an external water source. The water pumping device is installed on the machine body and driven by the transmission shaft in the gear transmission chain. The water supply pipeline is connected to the water inlet of the water pumping device, and the water outlet of the water pumping device is connected to an outlet pipe. At least one nozzle located inside a protective cover is provided at the end of the outlet pipe. When the motor starts, it synchronously drives the cutting blade and the water pumping device to operate. The water pumping device draws water from the water supply pipeline and pressurizes it, then delivers it to the nozzle through the water outlet pipe.

[0006] Preferably, the water pumping device is a centrifugal water pump, which includes a housing with an inlet and an outlet, and a centrifugal impeller disposed within the housing. The motor drives the centrifugal impeller to rotate within the housing via the gear transmission chain, drawing water in from the inlet and discharging it from the outlet.

[0007] Preferably, the water pumping device is a gear pump, which includes a housing with an inlet and an outlet, and a driving wheel and a driven wheel meshing with each other inside the housing. The motor drives the driving wheel and the driven wheel meshing with the driving wheel to rotate inside the housing through the gear transmission chain, so as to draw water in from the inlet and discharge it from the outlet.

[0008] Preferably, the gear transmission chain includes a first bevel gear mounted on the motor output shaft, a second bevel gear meshing with the first bevel gear, a first reduction gear coaxially fixed with the second bevel gear, and a second reduction gear meshing with the first reduction gear.

[0009] Preferably, the gear transmission chain further includes a first connecting shaft and a second connecting shaft disposed in the front end of the machine body, wherein the second bevel gear and the first reduction gear are fixedly connected to both ends of the first connecting shaft, the second reduction gear is fixedly connected to the second connecting shaft, wherein the front end of the second connecting shaft passes through the protective cover and is fixedly connected to the cutting blade, and the rear end of the second connecting shaft is fixedly connected to the power input end of the water pumping device.

[0010] Preferably, the gear transmission chain further includes a first connecting shaft and a second connecting shaft disposed in the front end of the machine body, wherein the second bevel gear and the first reduction gear are fixedly connected to both ends of the first connecting shaft, and the second reduction gear is fixedly connected to the second connecting shaft, wherein the rear end of the first connecting shaft is fixedly connected to the power input end of the water pumping device, and the front end of the second connecting shaft passes through the protective cover and is fixedly connected to the cutting blade.

[0011] Preferably, the gear transmission chain further includes a first connecting shaft and a second connecting shaft disposed in the front end of the machine body, wherein the second bevel gear and the first reduction gear are fixedly connected to both ends of the first connecting shaft, and the second reduction gear is fixedly connected to the second connecting shaft, wherein the front end of the first connecting shaft passes through the protective cover and is fixedly connected to the cutting blade, and the rear end of the second connecting shaft is fixedly connected to the power input end of the water pumping device.

[0012] Preferably, the gear transmission chain includes a first bevel gear mounted on the motor output shaft, a first connecting shaft disposed in the front end of the machine body, and a second bevel gear mounted on the first connecting shaft. The second bevel gear meshes with the first bevel gear. The front end of the first connecting shaft passes through the protective cover and is fixedly connected to the cutting blade, and the rear end of the first connecting shaft is fixedly connected to the power input end of the water pumping device.

[0013] Preferably, a regulating valve for controlling water flow is provided on the pipeline between the water outlet pipe and the nozzle. There are two nozzles, namely a first nozzle and a second nozzle. The first nozzle is located at the top of the protective cover, and the second nozzle is located at the bottom of the protective cover. The nozzles of both the first nozzle and the second nozzle face the cutting blade.

[0014] Preferably, the housing consists of a detachably connected upper cover and a bottom cover. The centrifugal impeller is disposed in the cavity formed by the closed upper cover and the bottom cover. The centrifugal impeller includes a shaft and a wheel. The drive shaft in the gear transmission chain passes through the bottom cover and is connected to the shaft. The wheel is provided with multiple blades distributed around the central hollow area. A flow channel is formed between adjacent blades. The upper cover is provided with the water inlet corresponding to the hollow area. The bottom cover is provided with the water outlet communicating with the flow channel.

[0015] The beneficial effects of this invention are: 1. This invention connects the power input end of a water pumping device (such as a centrifugal water pump or gear pump) to the gear transmission chain of a cutting machine, so that the water pumping device is synchronously driven by the main motor through mechanical transmission. When the motor starts, the cutting blade and the water pumping device operate simultaneously, and the water mist is sprayed out synchronously at the moment the cutting action begins, which effectively improves the dust suppression state and greatly enhances the dust suppression effect.

[0016] 2. This invention abandons the independent battery or power module required by traditional external electric water pumps. The power of the water pumping device comes entirely from the main motor of the cutting machine. Power is distributed only through a gear transmission chain, which reduces external wiring and power configuration, lowers energy consumption and failure rate, and avoids the weight increase and structural complexity brought about by multiple power systems, thus maintaining the original compactness and portability of the cutting machine. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the water pumping device and the machine body in this embodiment. Figure 3 This is a schematic diagram of a gear transmission chain. Figure 4 A schematic diagram of the water pump device and the outlet pipe; Figure 5 This is an exploded view of the front of the centrifugal water pump in this embodiment 1; Figure 6 This is an exploded view of the back of the centrifugal water pump in this embodiment. Figure 7 This is an exploded view of the front of the gear pump in this embodiment two; Figure 8 This is an exploded view of the back of the gear pump in this embodiment two; Figure 9 This is a top view of the machine body; Figure 10 for Figure 9 Sectional view at point AA; Figure 11 This is the right view of the machine body; Figure 12 for Figure 11 Sectional view at point BB; Figure 13 This is a schematic diagram of the structure of the cutting blade, the water pumping device, and the gear transmission chain in Embodiment 3. Figure 14 This is a schematic diagram of the structure of the cutting blade, the water pumping device, and the gear transmission chain in Embodiment 4. Figure 15 This is a schematic diagram of the structure of the cutting blade, the water pumping device, and the gear transmission chain in Embodiment 5. Figure 16 This is a schematic diagram of the structure of the cutting blade, the water pumping device, and the gear transmission chain in Embodiment Six. Explanation of reference numerals in the attached figures: 1. Machine body; 10. Water pump device; 11. Gear transmission chain; 100. Water supply pipeline; 101. Housing; 1011. Upper housing cover; 1012. Bottom housing; 102. Water inlet; 103. Water outlet; 104. Centrifugal impeller; 105. Water outlet pipe; 106. First bevel gear; 107. Second bevel gear; 108. First reduction gear; 109. Second reduction gear; 110. First connecting shaft; 111. Second connecting shaft; 112. Driving wheel; 113. Driven wheel; 114. Cavity; 115. Shaft hole; 116. Shaft; 117. Wheel; 118. Hollowed-out area; 119. Blade; 120. Flow channel; 121. Movable groove; 122. Limiting groove; 123. Adjusting valve; 124. First nozzle; 125. Second nozzle; 126. Front cover; 127. Rear cover; 128. First mounting base; 129. Second mounting base; 130. First bearing; 131. Second bearing; 132. Annular groove; 133. Sealing ring; 2. Electric motor; 3. Cutting disc; 4. Protective cover. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] Example 1 like Figures 1 to 12 As shown, a cutting machine with a built-in active water mist cooling and dust suppression system includes a body 1, a motor 2 installed inside the body 1, a gear transmission chain 11 installed at the front end of the body 1, a cutting blade 3 connected to the output end of the motor 2 via the gear transmission chain 11, and a protective cover 4 connected to the front end of the body 1 and located outside the cutting blade 3. The body 1 is equipped with a water supply pipe 100 connected to an external water source and a water pump 10. The water pump 10 is installed on the body 1 and driven by the transmission shaft in the gear transmission chain 11. The water supply pipe 100 is connected to the inlet 102 of the water pump 10, and the outlet 103 of the water pump 10 is connected to an outlet pipe 105. At least one nozzle located inside the protective cover 4 is provided at the end of the outlet pipe 105. When the motor 2 starts, it synchronously drives the cutting blade 3 and the water pump 10. The water pump 10 draws water from the water supply pipe 100, pressurizes it, and then delivers it to the nozzle through the outlet pipe 105.

[0020] The overall structure of the cutting machine includes a body 1, a motor 2 installed inside the body 1, a gear transmission chain 11 installed at the front end of the body 1, a cutting blade 3 connected to the output end of the motor 2 via the gear transmission chain 11, and a protective cover 4 fixed to the front end of the body 1 and covering the outside of the cutting blade 3. In this embodiment, the body 1 also integrates a water supply pipe 100 connected to an external water source and a water pumping device 10. The water pumping device 10 is fixedly installed on the body 1 and is directly driven by the transmission shaft in the gear transmission chain 11. The water supply pipe 100 is connected to the inlet 102 of the water pumping device 10, and the outlet 103 is led out through the outlet pipe 105. The end of the outlet pipe 105 is provided with at least one protective cover located at the front end of the machine. The nozzles inside the protective cover 4; when the motor 2 starts, the power is transmitted to the cutting blade 3 and the water pump device 10 simultaneously through the gear transmission chain 11, realizing the synchronous operation of the cutting action and the water mist spraying. The water pump device 10 draws in water from the external water source and pressurizes it, then delivers it to the nozzles through the water outlet pipe 105 to form a fine water mist sprayed onto the cutting area. This solution mechanically links the power source of the water pump device 10 with the main drive system, eliminating the independent power supply required by the traditional external electric water pump. It not only achieves real-time response of cutting start and water mist spraying, effectively avoiding the lag problem of water not arriving when dust rises, but also greatly simplifies the equipment structure, reduces energy consumption and failure rate, and improves the reliability and integration of the dust suppression system.

[0021] Specifically, such as Figure 2 , Figure 5 , Figure 6 and Figure 10 As shown, the water pumping device 10 is a centrifugal water pump. The centrifugal water pump includes a housing 101 with an inlet 102 and an outlet 103, and a centrifugal impeller 104 disposed in the housing 101. The motor 2 drives the centrifugal impeller 104 to rotate in the housing 101 through the gear transmission chain 11, drawing water in from the inlet 102 and discharging it from the outlet 103.

[0022] Based on the above, the water pumping device 10 is specifically configured as a centrifugal water pump, which includes a sealed housing 101 with an inlet 102 and an outlet 103, and a centrifugal impeller 104 installed inside the housing 101. The centrifugal impeller 104 is fixedly connected to the drive shaft in the gear transmission chain 11. When the motor 2 starts, the power is transmitted to the drive shaft through the transmission chain, driving the centrifugal impeller 104 to rotate at high speed inside the housing 101. Using centrifugal force, the water entering from the inlet 102 is thrown towards the inner wall of the housing 101, forming a pressurized water flow and being discharged from the outlet 103, realizing the intake and pressurized output of water. It makes full use of the characteristics of centrifugal pumps, such as stable flow, smooth operation, and suitability for continuous water supply. Combined with the synchronicity of mechanical transmission, it ensures that the water mist output pressure is proportional to the cutting speed. The faster the cutting, the stronger the spray, achieving dynamic matching. At the same time, the centrifugal structure has strong adaptability to water quality, is not easy to clog, and is easy to maintain. It is particularly suitable for environments with poor water quality at construction sites, significantly improving the stability and durability of the system.

[0023] Furthermore, Figure 5 , Figure 6 As shown, the housing 101 is composed of a detachably connected upper housing cover 1011 and a bottom housing 1012. The centrifugal impeller 104 is disposed in the cavity 114 formed by the upper housing cover 1011 and the bottom housing 1012. The centrifugal impeller 104 includes a shaft portion 116 and a wheel portion 117. The drive shaft in the gear transmission chain 11 passes through the bottom housing 1012 and is connected to the shaft portion 116. The wheel portion 117 is provided with multiple blades 119 distributed around the central hollow area 118. A flow channel 120 is formed between adjacent blades 119. The upper housing cover 1011 is provided with an inlet 102 corresponding to the hollow area 118, and the bottom housing 1012 is provided with an outlet 103 communicating with the flow channel 120.

[0024] The centrifugal pump casing 101 adopts a split design, consisting of a detachable upper casing 1011 and a bottom casing 1012 assembled by bolts. When closed, they form a sealed cavity 114 to accommodate the centrifugal impeller 104. The centrifugal impeller 104 includes a shaft 116 and a wheel 117. The shaft 116 is fixedly connected to the drive shaft in the gear transmission chain 11. The drive shaft passes through the bottom casing 1012 and extends into the cavity 114 to provide power input. The wheel 117 has a hollow area 118 in the center, with multiple blades 119 evenly distributed around it. Adjacent blades 119 form a guide channel 120. The upper casing 1011 has a water inlet 102 in the center, directly opposite the hollow area 118. Water flows through... The water enters the center of the impeller, is accelerated by rotation, and is thrown outward along the flow channel 120. It is discharged from the outlet 103 located on the side wall or end face of the bottom shell 1012. The split shell 101 design enables quick assembly and disassembly of the pump body, which facilitates regular cleaning of scale, silt, or impurities on the impeller, prevents blockage that would reduce flow rate, and extends the service life of the pump. At the same time, the inlet 102 is located at the center of the upper shell cover 1011, and the outlet 103 is located in the bottom shell 1012 and connected to the flow channel 120, forming a reasonable flow channel 120 layout, reducing water flow resistance, improving pumping efficiency, and making the overall structure compact, reliably sealed, and easy to maintain. It is especially suitable for long-term stable operation in harsh construction environments with high dust and poor water quality.

[0025] It should be noted that the upper casing 1011 and the bottom casing 1012 of the centrifugal water pump are not limited to being connected by bolts. They can also be connected by fasteners or other connecting parts that can tightly connect the two.

[0026] Specifically, such as Figure 1 , Figure 4 and Figure 10 As shown, a regulating valve 123 for controlling water flow is installed on the pipeline between the water outlet pipe 105 and the nozzle. There are two nozzles, namely the first nozzle 124 and the second nozzle 125. The first nozzle 124 is located on the top of the protective cover 4, and the second nozzle 125 is located on the bottom of the protective cover 4. The nozzles of the first nozzle 124 and the second nozzle 125 are both facing the cutting blade 3.

[0027] A regulating valve 123 for adjusting water flow is installed on the pipeline between the water outlet pipe 105 and the nozzle. There are two nozzles, namely a first nozzle 124 and a second nozzle 125. The first nozzle 124 is installed on the top of the protective cover 4, and the second nozzle 125 is located at the bottom of the protective cover 4. Both nozzles face the cutting area of ​​the cutting blade 3. This structure, with the two nozzles symmetrically arranged, forms a three-dimensional coverage mode that sprays water mist from above and below the cut, effectively suppressing dust that diffuses into the upper and lower spaces during the cutting process, avoiding the coverage blind spots of single-point spraying, and significantly improving the comprehensiveness and uniformity of dust suppression. At the same time, the regulating valve 123 on the pipeline can manually adjust the water flow according to the cutting requirements of different materials (such as concrete, ceramic tile, and stone), realizing on-demand water supply, preventing the working surface from becoming slippery due to excessive water volume or the dust suppression from being insufficient due to insufficient water volume, thus improving the adaptability and operational flexibility of the system. It is especially suitable for construction sites with multiple scenarios and materials, taking into account both efficient dust suppression and water conservation.

[0028] Example 2 like Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, a cutting machine with a built-in active water mist cooling and dust suppression system in this embodiment includes a machine body 1, a motor 2, a gear transmission chain 11, a cutting blade 3, a protective cover 4, a water supply pipeline 100, a water pump device 10, a water outlet pipe 105, and a nozzle located inside the protective cover 4.

[0029] The water pumping device 10 is a gear pump. The gear pump includes a housing 101 with an inlet 102 and an outlet 103, and a driving wheel 112 and a driven wheel 113 meshing with each other inside the housing 101. The motor 2 drives the driving wheel 112 and the driven wheel 113 meshing with the driving wheel 112 to rotate inside the housing 101 through the gear transmission chain 11, so as to draw water in from the inlet 102 and discharge it from the outlet 103.

[0030] In this embodiment, the water pumping device 10 is a gear pump, which includes a pump housing 101 with an inlet 102 and an outlet 103, and a driving gear 112 (driving gear) and a driven gear 113 (driven gear) meshing with each other within the housing 101. The driving gear 112 is fixedly connected to the transmission shaft in the gear transmission chain 11, and the driven gear 113 is rotatably disposed in the bottom shell 1012 of the housing 101. After the motor 2 is started, it drives the driving gear 112 to rotate through the transmission shaft, thereby driving the driven gear 113 to rotate in the opposite direction. During the gear meshing and separation process, a local negative pressure is formed to draw in water flow, and during the meshing and propulsion process, the water is pressurized and forcibly discharged from the outlet 103. This technical solution utilizes the advantages of gear pumps, such as volumetric conveying, high output pressure, and strong self-priming ability, to provide a stable high-pressure water flow at low speeds. It is particularly suitable for dust suppression scenarios that require concentrated spraying and strong penetration. At the same time, the gear pump has a compact structure, good sealing performance, and wear resistance. Combined with mechanical transmission, it can achieve long-term maintenance-free operation, further enhancing the reliability of this invention in high-intensity, high-dust working environments.

[0031] Example 3 like Figure 3 , Figure 12 and Figure 13 As shown, the gear transmission chain 11 includes a first bevel gear 106 mounted on the output shaft of the motor 2, a second bevel gear 107 meshing with the first bevel gear 106, a first reduction gear 108 coaxially fixed with the second bevel gear 107, and a second reduction gear 109 meshing with the first reduction gear 108.

[0032] The gear transmission chain 11 adopts a multi-stage reduction and direction conversion structure design, including a first bevel gear 106 mounted on the output shaft of the motor 2, a second bevel gear 107 meshing with it, a first reduction gear 108 coaxially fixed with the second bevel gear 107, and a second reduction gear 109 meshing with the first reduction gear 108. Power steering is achieved through the bevel gear, and speed adjustment and torque amplification are achieved through the reduction gear pair, forming a stable and reliable transmission path. This not only optimizes the spatial layout of the main drive system and adapts to the compact front-end structure of the cutting machine, but also increases the output torque through two-stage reduction, ensuring that the cutting blade 3 can still operate stably under high load. At the same time, a power split interface is reserved for subsequent connection of the water pump device 10, providing a structural basis for realizing synchronous drive of cutting and spraying.

[0033] It should be noted that the first bevel gear 106, the first reduction gear 108, and the second reduction gear 109 in the drawing do not have teeth, but this does not mean that these gears are actually toothless. The omission of teeth in the drawing is only for the purpose of simplifying the drawing and highlighting the assembly relationship and overall structural layout.

[0034] Furthermore, such as Figure 3 As shown, the gear transmission chain 11 also includes a first connecting shaft 110 and a second connecting shaft 111 disposed in the front end of the machine body 1. The second bevel gear 107 and the first reduction gear 108 are fixedly connected to both ends of the first connecting shaft 110, and the second reduction gear 109 is fixedly connected to the second connecting shaft 111. The front end of the second connecting shaft 111 passes through the protective cover 4 and is fixedly connected to the cutting blade 3. The rear end of the second connecting shaft 111 is fixedly connected to the power input end of the water pumping device 10.

[0035] Based on the above transmission structure, a first connecting shaft 110 and a second connecting shaft 111 are further provided. The second bevel gear 107 and the first reduction gear 108 are fixed at both ends of the first connecting shaft 110, and the second reduction gear 109 is fixed on the second connecting shaft 111. The front end of the second connecting shaft 111 passes through the protective cover 4 and is fixedly connected to the cutting blade 3. The rear end is directly connected to the power input end of the water pumping device 10 (such as the shaft 116 of the centrifugal impeller 104 or the drive wheel 112 of the gear pump) to realize synchronous power splitting. In this embodiment, both the cutting blade 3 and the water pumping device 10 are driven by the second connecting shaft 111. That is, the second connecting shaft 111 is both the cutting main shaft and the power input shaft of the water pumping device 10. The structure is highly integrated, the transmission path is the shortest, the energy loss is small, and the response speed is fast. At the same time, since the water pumping device 10 is arranged close to the cutting area, the water outlet pipe 105 is short, the water flow delay is low, and the spray start-up is more timely. It is particularly suitable for handheld cutting equipment with high requirements for dust suppression response speed, which significantly improves the synchronization and compactness of the system.

[0036] Example 4 like Figure 14 As shown, the gear transmission chain 11 also includes a first connecting shaft 110 and a second connecting shaft 111 disposed in the front end of the machine body 1. The second bevel gear 107 and the first reduction gear 108 are fixedly connected to both ends of the first connecting shaft 110, and the second reduction gear 109 is fixedly connected to the second connecting shaft 111. The rear end of the first connecting shaft 110 is fixedly connected to the power input end of the water pumping device 10, and the front end of the second connecting shaft 111 passes through the protective cover 4 and is fixedly connected to the cutting blade 3.

[0037] This embodiment is a variation of Embodiment 3. Under the same multi-stage transmission structure, the second bevel gear 107 and the first reduction gear 108 are respectively fixed to both ends of the first connecting shaft 110, while the second reduction gear 109 is fixed to the second connecting shaft 111. The rear end of the first connecting shaft 110 is fixedly connected to the power input end of the water pumping device 10 to drive the water pump, while the front end of the second connecting shaft 111 passes through the protective cover 4 and is fixedly connected to the cutting blade 3 to perform the cutting action. In this embodiment, the first connecting shaft 110 is dedicated to driving the water pumping device 10. It transmits deceleration power, and the second connecting shaft 111 outputs rotational power as the cutting main shaft. The power is transmitted through the meshing of the first reduction gear 108 on the first connecting shaft 110 and the second reduction gear 109 on the second connecting shaft 111, realizing the synchronous operation of cutting and spraying. It separates the power input of the water pumping device 10 from the cutting main shaft, avoids the superposition of pump drive load on the main shaft, and is conducive to improving cutting stability and transmission accuracy. At the same time, the water pumping device 10 is directly driven by the front drive shaft, which has a compact structure, is easy to maintain, and has good power distribution rationality and system reliability.

[0038] Example 5 like Figure 15 As shown, the gear transmission chain 11 also includes a first connecting shaft 110 and a second connecting shaft 111 disposed in the front end of the machine body 1. The second bevel gear 107 and the first reduction gear 108 are fixedly connected to both ends of the first connecting shaft 110, and the second reduction gear 109 is fixedly connected to the second connecting shaft 111. The front end of the first connecting shaft 110 passes through the protective cover 4 and is fixedly connected to the cutting blade 3, and the rear end of the second connecting shaft 111 is fixedly connected to the power input end of the water pumping device 10.

[0039] This embodiment is another variation of embodiment three or four. The second bevel gear 107 and the first reduction gear 108 are still fixed to the first connecting shaft 110, and the second reduction gear 109 is fixed to the second connecting shaft 111. However, the connection relationship is adjusted so that the front end of the first connecting shaft 110 passes through the protective cover 4 and connects to the cutting blade 3, and the rear end of the second connecting shaft 111 is connected to the power input end of the water pumping device 10. In this embodiment, the cutting action is driven by the first connecting shaft 110, and the water pumping device 10 is driven by the second connecting shaft 111. This achieves complete separation of the cutting and water supply power paths, avoids stress concentration caused by load superposition on the same transmission shaft, and improves the reliability and life of the transmission system. At the same time, the independent drive of the two shafts facilitates independent adjustment of the cutting speed and water pump flow rate, which is especially suitable for working conditions that require precise control of the spray volume. In addition, this layout allows the water pumping device 10 to be arranged on the side or rear of the machine body 1, optimizing the overall center of gravity distribution and improving operational balance.

[0040] Example 6 like Figure 16As shown, the gear transmission chain 11 includes a first bevel gear 106 mounted on the output shaft of the motor 2, a first connecting shaft 110 disposed in the front end of the machine body 1, and a second bevel gear 107 mounted on the first connecting shaft 110. The second bevel gear 107 meshes with the first bevel gear 106. The front end of the first connecting shaft 110 passes through the protective cover 4 and is fixedly connected to the cutting blade 3. The rear end of the first connecting shaft 110 is fixedly connected to the power input end of the water pumping device 10.

[0041] This solution provides a simplified transmission structure. The gear transmission chain 11 includes only a first bevel gear 106 mounted on the output shaft of the motor 2, a first connecting shaft 110 located at the front end of the machine body 1, and a second bevel gear 107 mounted on the first connecting shaft 110. The second bevel gear 107 meshes with the first bevel gear 106 to realize the transmission of power from the motor 2 to the lateral direction. The front end of the first connecting shaft 110 passes through the protective cover 4 and is fixedly connected to the cutting blade 3, while the rear end is directly connected to the power input end of the water pumping device 10. In this embodiment, the reduction gear set is omitted, and a single-stage bevel gear transmission is used to directly drive the cutting blade 3 and the water pumping device 10. The structure is extremely simple, with few parts, low manufacturing cost, and convenient assembly. Although the transmission ratio is fixed, it is suitable for medium and low power cutting machines that do not require high cutting speed but have high requirements for dust suppression synchronization. This solution drives cutting and spraying simultaneously through a single transmission shaft, realizing an instant response of spraying upon startup. It is particularly suitable for household or light decoration tools and has the advantages of high reliability and cost-effectiveness.

[0042] It is worth mentioning that, as Figure 11 As shown, to further improve the stability and sealing reliability of the transmission system, in embodiments three to six, a first mounting seat 128 and a second mounting seat 129 are respectively provided on the head shell at the front end of the machine body 1, corresponding to the axial positions of the first connecting shaft 110 and the second connecting shaft 111. Bearings are embedded in the mounting seats. The two ends of the first connecting shaft 110 and the second connecting shaft 111 are rotatably connected to the front cover 126 and the rear cover 127 through the bearings, forming a double-sided support structure. This effectively reduces axial runout and radial sway during high-speed rotation, improves transmission smoothness, reduces vibration and noise, and extends the service life of gears and bearings. Simultaneously, to prevent water from leaking from the pumping device 10 along the transmission shaft into the machine body 1, annular grooves 132 are respectively provided on the mating end faces of the housing 101 of the pumping device 10 and the rear cover 127. Sealing rings 133 (such as O-rings) are embedded in the annular grooves 132. Figure 3 and Figure 8As shown, the drive shaft passes through the inner hole of the sealing ring 133 and enters the pump body. For example, it is connected to the shaft 116 of the centrifugal impeller 104 of a centrifugal water pump or the drive wheel 112 of a gear pump. The double-stage sealing structure effectively blocks the axial penetration path of water, preventing high-pressure water from entering the gear transmission cavity or motor 2 area in the head shell at the front end of the machine body 1, which significantly improves the safety of the equipment and the long-term operational reliability.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cutting machine with a built-in active water mist cooling and dust suppression system, characterized in that: Includes a body (1), a motor (2) installed inside the body (1), a gear transmission chain (11) installed at the front end of the body (1), a cutting blade (3) that is connected to the output end of the motor (2) via the gear transmission chain (11), and a protective cover (4) that is connected to the front end of the body (1) and installed on the outside of the cutting blade (3). The machine body (1) is provided with a water supply pipeline (100) and a water pump device (10) connected to an external water source. The water pump device (10) is installed on the machine body (1) and driven by the transmission shaft in the gear transmission chain (11). The water supply pipeline (100) is connected to the water inlet (102) of the water pump device (10). The water outlet (103) of the water pump device (10) is connected to a water outlet pipe (105). At least one nozzle located inside the protective cover (4) is provided at the end of the water outlet pipe (105). When the motor (2) starts, it synchronously drives the cutting blade (3) and the water pump (10) to operate. The water pump (10) draws water from the water supply pipeline (100) and pressurizes it, and then delivers it to the nozzle through the water outlet pipe (105) and sprays it out.

2. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 1, characterized in that: The pumping device (10) is a centrifugal water pump. The centrifugal water pump includes a housing (101) with an inlet (102) and an outlet (103) and a centrifugal impeller (104) disposed in the housing (101). The motor drives the centrifugal impeller to rotate in the housing (101) through the gear transmission chain (11), drawing water in from the inlet and discharging it from the outlet.

3. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 1, characterized in that: The water pumping device (10) is a gear pump. The gear pump includes a housing (101) with an inlet (102) and an outlet (103), and a drive wheel (112) and a driven wheel (113) meshing with each other in the housing (101). The motor drives the drive wheel (112) and the driven wheel (113) meshing with the drive wheel (112) to rotate in the housing (101) through the gear transmission chain (11), so as to draw water in from the inlet and discharge it from the outlet.

4. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 2 or 3, characterized in that: The gear transmission chain (11) includes a first bevel gear (106) mounted on the output shaft of the motor (2), a second bevel gear (107) meshing with the first bevel gear (106), a first reduction gear (108) coaxially fixed with the second bevel gear (107), and a second reduction gear (109) meshing with the first reduction gear (108).

5. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 4, characterized in that: The gear transmission chain (11) also includes a first connecting shaft (110) and a second connecting shaft (111) disposed in the front end of the machine body (1). The second bevel gear (107) and the first reduction gear (108) are fixedly connected to both ends of the first connecting shaft (110), and the second reduction gear (109) is fixedly connected to the second connecting shaft (111). The front end of the second connecting shaft (111) passes through the protective cover (4) and is fixedly connected to the cutting blade (3). The rear end of the second connecting shaft (111) is fixedly connected to the power input end of the water pumping device (10).

6. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 4, characterized in that: The gear transmission chain (11) also includes a first connecting shaft (110) and a second connecting shaft (111) disposed in the front end of the machine body (1). The second bevel gear (107) and the first reduction gear (108) are fixedly connected to both ends of the first connecting shaft (110), and the second reduction gear (109) is fixedly connected to the second connecting shaft (111). The rear end of the first connecting shaft (110) is fixedly connected to the power input end of the water pumping device (10), and the front end of the second connecting shaft (111) passes through the protective cover (4) and is fixedly connected to the cutting blade (3).

7. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 4, characterized in that: The gear transmission chain (11) also includes a first connecting shaft (110) and a second connecting shaft (111) disposed in the front end of the body (1). The second bevel gear (107) and the first reduction gear (108) are fixedly connected to both ends of the first connecting shaft (110), and the second reduction gear (109) is fixedly connected to the second connecting shaft (111). The front end of the first connecting shaft (110) passes through the protective cover (4) and is fixedly connected to the cutting blade (3). The rear end of the second connecting shaft (111) is fixedly connected to the power input end of the water pumping device (10).

8. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 2 or 3, characterized in that: The gear transmission chain (11) includes a first bevel gear (106) mounted on the output shaft of the motor (2), a first connecting shaft (110) located in the front end of the machine body, and a second bevel gear (107) mounted on the first connecting shaft (110). The second bevel gear (107) meshes with the first bevel gear (106). The front end of the first connecting shaft (110) passes through the protective cover (4) and is fixedly connected to the cutting blade (3). The rear end of the first connecting shaft (110) is fixedly connected to the power input end of the water pumping device (10).

9. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 1, characterized in that: A regulating valve (123) for controlling water flow is provided on the pipeline between the water outlet pipe (105) and the nozzle. There are two nozzles, namely a first nozzle (124) and a second nozzle (125). The first nozzle (124) is located on the top of the protective cover (4), and the second nozzle (125) is located on the bottom of the protective cover (4). The nozzles of the first nozzle (124) and the second nozzle (125) are both facing the cutting blade (3).

10. The cutting machine with a built-in active water mist cooling and dust suppression system according to claim 2, characterized in that: The housing (101) is composed of a detachably connected upper cover (1011) and a bottom cover (1012). The centrifugal impeller (104) is disposed in a cavity (114) formed by the closure of the upper cover (1011) and the bottom cover (1012). The centrifugal impeller (104) includes a shaft (116) and a wheel (117). The transmission shaft in the gear transmission chain (11) passes through the bottom cover (1012) and is connected to the shaft (116). The wheel (117) is provided with multiple blades (119) distributed around the central hollow area (118). A flow channel (120) is formed between adjacent blades. The upper cover (1011) is provided with the water inlet (102) corresponding to the hollow area (118). The bottom cover (1012) is provided with the water outlet (103) communicating with the flow channel (120).

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