Cutting saw

Abstract

The present application relates to a kind of cutting saw, cutting saw includes: shell, handle, saw structure, driving mechanism, cooling pipeline, adjusting assembly and controller, handle is connected to shell, handle is at least used to lift cutting saw;Saw structure is connected to shell;Driving mechanism provides the driving force of driving saw structure rotation;Cooling pipeline transports cooling fluid to saw structure;Adjusting assembly is movably connected to shell, adjusting assembly is used to adjust the fluid flow of cooling fluid from cooling pipeline, and the displacement of adjusting assembly relative to shell displacement under the action of external force and fluid flow satisfy first positive proportional relationship;Controller is connected to adjusting assembly and driving mechanism respectively, and the rotation speed of controller is used to control driving mechanism according to displacement, displacement and the rotation speed of driving mechanism satisfy second positive proportional relationship.The technical scheme of the embodiment of the present application can more delicate control cooling fluid ejection amount, realize the adjustment of cooling fluid flow.

Description

Technical Field

[0001] This invention relates to the field of electric machinery technology, and in particular to a cutting saw. Background Technology

[0002] Electric cutting saws are widely used, for example, for cutting building materials. Cooling water is typically used during cutting to assist in the cutting process, reduce dust, and cool the cutting wheel. Cooling water is supplied to the cutting wheel through a cooling water circuit. This circuit generally includes water pipes and a valve to control the flow of cooling water. The valve is usually located at the inlet of the water pipe, outside the saw's housing. When operating the saw manually, the drive mechanism needs to be activated to rotate the cutting wheel, and the valve also needs to be opened to spray water. Currently, the valve on the water pipe only functions to turn the cooling water on or off; it cannot adjust the water flow rate. Summary of the Invention

[0003] The problem the invention aims to solve

[0004] To address the problem that the flow rate of cooling fluid ejected from a cutting saw cannot be adjusted, this disclosure provides a cutting saw.

[0005] Solution for solving the problem

[0006] This disclosure provides a cutting saw, the cutting saw comprising:

[0007] case;

[0008] A handle, connected to the housing, is used at least to lift the cutting saw;

[0009] A saw-like structure is connected to the housing;

[0010] A drive mechanism provides the driving force to rotate the saw structure;

[0011] Cooling pipes supply cooling fluid to the saw structure;

[0012] An adjustment component is movably connected to the housing. The adjustment component is used to adjust the flow rate of the cooling fluid flowing out of the cooling pipe, and the displacement of the adjustment component relative to the housing under the action of an external force satisfies a first positive proportional relationship with the fluid flow rate.

[0013] A controller is connected to both the adjustment component and the drive mechanism. The controller is used to control the rotational speed of the drive mechanism according to the displacement, wherein the displacement and the rotational speed of the drive mechanism satisfy a second direct proportional relationship.

[0014] Optionally, when the displacement is equal to or greater than the second preset amount, the controller controls the drive mechanism to rotate; wherein, when the displacement is less than the second preset amount, the upper limit of the fluid flow rate is less than the first preset amount, the lower limit of the fluid flow rate is greater than or equal to 0, and the first preset amount is greater than 0.

[0015] Optionally, the adjustment component includes:

[0016] A trigger that generates the displacement under the action of the external force;

[0017] A flow valve, which can be linked with the trigger to change the flow rate of the cooling fluid flowing out of the cooling pipe through the flow valve;

[0018] A positioner, which is linked to the trigger to generate different adjustment signals as the displacement changes, wherein the controller controls the rotational speed of the drive mechanism according to the adjustment signals.

[0019] Optionally, the flow valve includes:

[0020] The valve body has a first receiving cavity, and an opening, a fluid inlet, and a fluid outlet respectively communicating with the first receiving cavity, wherein the fluid inlet and the fluid outlet are respectively connected to the cooling pipeline;

[0021] A valve core is inserted into the first receiving cavity through the opening, and the valve core is capable of being linked with the trigger.

[0022] The trigger switches between at least a first position and a second position during its movement relative to the housing;

[0023] When the trigger is in the first position, the valve core blocks the fluid outlet;

[0024] When the trigger is in the second position, the valve core does not block the fluid outlet, so that the fluid outlet is fully open;

[0025] When the trigger is between the first position and the second position, the valve core portion blocks the fluid outlet, and the fluid outlet portion is open.

[0026] Optionally, the trigger further has a third position located between the first position and the second position;

[0027] When the trigger is in the first position, there is a gap between the trigger and the positioner;

[0028] When the trigger is located between the first position and the third position, the trigger can be linked with the flow valve;

[0029] When the trigger is between the third position and the second position, the trigger remains linked with the valve core while also contacting the positioner to achieve linkage with the positioner.

[0030] Optionally, the valve core includes:

[0031] The spindle is capable of being linked with the trigger;

[0032] A flow control element is connected to the mandrel and moves with the mandrel. The flow control element can block the fluid outlet during the movement of the mandrel.

[0033] Optionally, when the trigger switches between the first position and the second position, the movement direction of the valve core is perpendicular to the axis of the flow outlet.

[0034] Optionally, the distance the valve core moves from the first position to the second position is linearly positively correlated with the fluid flow rate.

[0035] Optionally, the flow valve further includes:

[0036] A first elastic element is located within the first receiving cavity, and the first elastic element provides the valve core with an elastic force to move in the direction of the fluid outlet.

[0037] Optionally, the flow valve further includes:

[0038] A plug body is inserted into the first receiving cavity through the opening, the plug body having a through hole for the valve core to pass through;

[0039] A first gasket is connected to the plug body;

[0040] The second gasket is connected to the flow control component, and the first elastic element has its two ends connected to the first gasket and the second gasket, respectively.

[0041] Optionally, the flow valve further includes:

[0042] When the trigger is in the first position, the first seal is sealed to the valve core and the inner wall of the first receiving cavity, respectively. The first seal is used to restrict the flow of cooling fluid entering the first receiving cavity through the fluid inlet to the fluid outlet.

[0043] Optionally, the flow valve further includes:

[0044] A second seal is respectively connected to the inner wall of the plug and the first receiving cavity, and the second seal is used to restrict the flow of fluid in the first receiving cavity out through the opening; and / or,

[0045] The third sealing element is respectively sealed to the plug body and the mandrel to restrict the fluid in the first receiving cavity from flowing out through the through hole.

[0046] Optionally, the housing has a protruding shaft; the trigger is connected to the shaft and is rotatable along the axis of the shaft, the displacement of the trigger being the rotation angle of the trigger;

[0047] The first part of the trigger is connected to the valve core, or the first end of the trigger is connected to the valve core through a linkage.

[0048] The second part of the trigger is used to receive external force, and the second part and the first part are located on both sides of the shaft.

[0049] Optionally, the second part of the trigger can be linked with the positioner.

[0050] Optionally, the cutting saw further includes:

[0051] The second elastic element is connected at both ends to the housing and the second part, respectively, to provide the trigger with an elastic force to return to the first position.

[0052] Optionally, the interior of the housing has a protruding portion, the protruding portion having a limiting surface opposite to the trigger;

[0053] When the trigger is in the second position, the limiting surface abuts against the trigger to restrict further displacement of the trigger.

[0054] Optionally, the cooling pipeline includes:

[0055] A first pipeline is connected to the fluid inlet, and the first pipeline is used to transport fluid supplied by a fluid source to the fluid inlet;

[0056] A second pipeline is connected to the fluid outlet, and the second pipeline is used to deliver the cooling fluid flowing through the flow valve to the saw structure.

[0057] Optionally, the housing has a second receiving cavity, in which the flow valve, the controller, the positioner, and at least a portion of the cooling piping are located.

[0058] The effects of the invention

[0059] In this embodiment, by utilizing a first proportional relationship between the displacement of the adjusting component and the fluid flow rate, and a second proportional relationship between the displacement of the adjusting component and the rotational speed of the drive mechanism, the amount of cooling fluid ejected can be controlled more precisely, thereby achieving adjustment of the cooling fluid flow rate. Furthermore, by operating the same adjusting component, both the flow rate of the cooling fluid and the drive mechanism can be controlled. The opening and closing of the cooling fluid are linked to the opening and closing of the drive mechanism, ensuring timely switching on and off of the cooling fluid and facilitating the operation of the cutting saw. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the structure of the cutting saw in an optional embodiment of this disclosure;

[0061] Figure 2a for Figure 1 A schematic diagram of the cutting saw structure after removing part of the outer casing, in which the trigger is in the first position;

[0062] Figure 2b for Figure 2a Except for the enlarged image in section A;

[0063] Figure 3a for Figure 2a Enlarged view of point B in the middle;

[0064] Figure 3b The diagram shows a partial structural schematic of the cutting saw when the trigger is in the first and second positions, respectively.

[0065] Figure 4 for Figure 2a In the diagram, the overall structure of the flow valve is shown when the trigger is in the first position.

[0066] Figure 5 for Figure 4 Cross-sectional view of a medium flow valve;

[0067] Figure 6 for Figure 2a In the middle, a cross-sectional view of the flow valve when the trigger is in the second position;

[0068] Figure 7 for Figure 2a The diagram shows a cross-sectional view of the flow valve when the trigger is in the first position or the second position.

[0069] Explanation of reference numerals in the attached figures

[0070] 100. Cutting saw; 101. Gap between trigger and positioner; 102. Second elastic element;

[0071] 110. Housing; 111. Shaft; 112. Protrusion; 112a. Limiting surface; 113. Second receiving cavity;

[0072] 120. Cooling pipe; 121. First pipe; 122. Second pipe;

[0073] 130. Adjustment assembly; 131. Trigger; 131a. First part; 131b. Second part; 132. Positioner; 132a. Main body; 132b. Handle; 133. Linkage component;

[0074] 140. Flow valve; 140a. Opening; 140b. Boss; 141. Valve body; 141a. Side wall; 141b. Bottom wall; 141c. Inclined portion of connecting wall; 142. Fluid inlet; 143. Fluid outlet; 144. Valve core; 144a. Mandrel; 144b. Flow control element; 144c. Groove; 145. First receiving cavity; 146. First elastic element; 147. First seal; 148. Plug; 148a. Second seal; 148b. Third seal; 148c. Through hole; 149a. First gasket; 149b. Second gasket;

[0075] 150. Controller;

[0076] 160. Saw structure; 161. Saw blade; 162. Rotating shaft;

[0077] 170. Front handle;

[0078] 180. Rear handle;

[0079] 190. Protection button. Detailed Implementation

[0080] To make the technical solution and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0081] In the description of this invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limiting this invention.

[0082] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature above second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0085] Figure 1 and Figure 2a An exemplary schematic diagram of a cutting saw is shown.

[0086] like Figure 1 and Figure 2aAs shown, the cutting saw 100 provided in this embodiment includes: a housing 110, a saw structure 160, a drive mechanism, a cooling pipe 120, an adjustment assembly 130, and a controller 150. The saw structure 160 includes a saw blade 161 and a rotating shaft 162 connected to the saw blade 161. The drive mechanism can drive the rotating shaft 162 to rotate, and the rotating shaft 162 in turn drives the saw blade 161 to rotate. The drive mechanism includes a transmission device and a drive source (generally a motor). The driving force provided by the drive source is transmitted to the rotating shaft 162 of the saw structure 160 through the transmission device. The cooling pipe 120 can be connected to an external cooling source and connects the cooling source and the space where the saw structure 160 is located, so as to deliver cooling fluid to the saw structure 160. The adjusting component 130 is connected to the housing 110. When the user operates the adjusting component 130, an external force is applied to it. Under the action of the external force, the adjusting component 130 is displaced relative to the housing 110. Different displacements of the adjusting component 130 result in different flow rates of the cooling fluid flowing out of the cooling pipe 120. In other words, the flow rate of the fluid flowing to the saw structure 160 can be adjusted by adjusting the displacement of the adjusting component 130. The controller 150 is connected to the drive mechanism. The controller 150 is used to control the drive mechanism to rotate in response to a fluid flow rate greater than or equal to a first preset amount, wherein the first preset amount is greater than 0.

[0087] It is understandable that when the cutting saw 100 is in a non-working state, i.e., when the cutting saw 100 is not operated (the displacement of the adjusting component 130 relative to the housing 110 is 0), the cooling pipe 120 cannot supply coolant to the saw structure 160, i.e., the fluid flow rate is 0. However, when an external force is applied to the adjusting component 130, causing it to displace, the cooling fluid can flow to the saw structure 160. After the displacement of the adjusting component 130 relative to the housing 110 is removed (i.e., no displacement occurs between the adjusting component 130 and the housing 110), the fluid flow rate can return to 0, and the cooling fluid is shut off. Therefore, by adjusting the displacement of the adjusting component 130, both the flow rate can be adjusted, and the cooling fluid can be switched on and off. The rotation of the drive mechanism means the rotation of the saw structure 160, indicating that the cutting saw 100 has entered the working state. The cessation of the rotation of the drive mechanism means the cessation of the rotation of the saw structure 160, indicating that the cutting saw 100 has stopped working.

[0088] When the fluid flow rate is greater than or equal to the first preset amount, it indicates that cooling fluid has flowed to the saw structure 160. At this time, the controller 150 controls the drive mechanism to rotate, realizing cooling before cutting and further reducing the dust generated during cutting.

[0089] After the displacement of the adjustment component 130 is removed, the fluid flow rate will be less than the first preset amount, the drive mechanism will stop rotating, and the cutting saw 100 will stop working. That is, by operating the adjustment component 130, both the cooling fluid and the rotation of the saw structure 160 can be turned off.

[0090] The controller 150 is also used to: control the drive mechanism to stop rotating in response to the fluid flow rate being less than a first preset amount. Since the first preset amount is greater than 0, the fluid flow rate may not be 0 after the drive mechanism stops, thereby stopping the cutting before the cooling fluid is turned off, ensuring that cooling fluid flows to the saw structure 160 throughout the entire cutting process.

[0091] In summary, in this embodiment of the present disclosure, both the flow rate of the cooling fluid and the drive mechanism can be controlled by operating the same regulating component 130. The activation of the cooling fluid and the activation of the drive mechanism are linked, as are the deactivation of the cooling fluid and the deactivation of the drive mechanism. Once the drive mechanism is activated, the cooling fluid will definitely be activated; once the drive mechanism is deactivated, the cooling fluid will definitely be deactivated. This ensures timely activation or deactivation of the cooling fluid and facilitates the operation of the cutting saw 100.

[0092] The displacement of the adjusting component 130 relative to the housing 110 can be a linear displacement or a rotational displacement along a curved path. When the adjusting component 130 is subjected to an external force, the direction of its displacement is opposite to the direction of the displacement of the retracting adjusting component 130.

[0093] The first preset value is greater than 0 but less than or equal to the maximum allowable flow rate of cooling pipe 120. Here, the maximum allowable flow rate refers to the maximum volumetric flow rate through fluid outlet 143 per unit time. The specific value of the first preset value can be selected by those skilled in the art as needed.

[0094] Figure 1 and Figure 2a In the illustrated embodiment, the cooling fluid is water. It is understood that the cooling fluid can also be any liquid other than water, or it can be an airflow, such as air.

[0095] An external cooling source can be a water pipe connected to a tap or a tank storing cooling fluid. If the cooling fluid supplied by the external cooling source has a certain pressure (generally less than 0.5 MPa), a pump structure is unnecessary; the pressure provided by the external cooling source can be used to transport the cooling fluid. For example: Figure 1 and Figure 2a In the illustrated embodiment, the external cooling source is a tap water pipe, which is directly connected to the water inlet of the cooling pipe 120. After adjusting the displacement of the component 130 relative to the housing 110, the pressure of the tap water can be used to spray it onto the saw structure 160. If the external cooling source cannot provide pressure, a pump structure can be added to spray the cooling fluid onto the saw structure 160 using the pressure provided by the pump structure.

[0096] Optionally, the controller 150 is connected to the regulating component 130 so that the controller 150 obtains information characterizing the fluid flow rate from the regulating component 130. It is understood that the controller 150 may also not be connected to the regulating component 130, and an additional flow detection device (e.g., a flow meter) may be used to detect the fluid flow rate, with the controller 150 connected to the flow detection device to obtain information characterizing the fluid flow rate from it.

[0097] According to some optional embodiments, the relationship between the displacement of the adjustment component 130 relative to the housing 110 and the fluid flow rate, and the relationship between the fluid flow rate and the rotational speed of the drive mechanism, both satisfy a positive proportional relationship.

[0098] The rotational speed of the drive mechanism refers to the rotational speed of the drive source (usually a motor).

[0099] The greater the displacement of the regulating component 130 relative to the housing 110, the greater the fluid flow rate and the higher the rotational speed of the drive mechanism. Conversely, the smaller the displacement of the regulating component 130 relative to the housing 110, the smaller the fluid flow rate and the lower the rotational speed of the drive mechanism. When the displacement of the regulating component 130 relative to the housing 110 is 0, the cooling fluid is shut off, and the drive mechanism stops rotating.

[0100] Optionally, the displacement of the regulating component 130 can characterize the fluid flow rate, and the controller 150 can determine whether to control the rotation of the drive mechanism based on the displacement. Furthermore, the above-mentioned direct proportional relationship can be further understood as follows: the displacement of the regulating component 130 relative to the housing 110 under the action of external force satisfies a first direct proportional relationship with the fluid flow rate, and the displacement of the regulating component 130 satisfies a second direct proportional relationship with the rotational speed of the drive mechanism.

[0101] The first and second direct proportional relationships can be the same or different functional relationships.

[0102] According to some optional embodiments, the controller 150 is configured to: control the drive mechanism to rotate in response to the displacement of the regulating component 130 being equal to or greater than a second preset amount; wherein, when the displacement is less than the second preset amount, the upper limit of the fluid flow rate is less than the first preset amount, and the lower limit of the fluid flow rate is greater than or equal to 0.

[0103] When the displacement of the adjusting component 130 is equal to or greater than the second preset amount, it indicates that the fluid flow rate is greater than or equal to the first preset amount.

[0104] For example, a displacement measuring device (e.g., a displacement sensor) for measuring the displacement of the adjustment assembly 130 can be provided in the cutting saw 100, and the controller 150 controls the drive mechanism by obtaining the displacement measured by the displacement measuring device.

[0105] The second preset value can be set as needed. For example, if the displacement is a rotational displacement along a curved path, the second preset value can be 3°, 5°, 8°, or 10°, etc.

[0106] like Figure 2a and Figure 3a As shown, according to some optional embodiments, the adjustment component 130 includes: a trigger 131, a flow valve 140, and a positioner 132. The trigger 131 is used to receive an external force to generate the aforementioned displacement under the action of the external force. The flow valve 140 can be linked with the trigger 131. When the trigger 131 is displaced by an external force, it can open the flow valve 140 and change the flow rate of the cooling fluid flowing out of the cooling pipe 120 through the flow valve 140. The positioner 132 can be linked with the trigger 131 to generate different adjustment signals as the displacement changes. The controller 150 controls the rotational speed according to the adjustment signal.

[0107] The positioner 132 is used to detect the displacement of the trigger 131. Different displacements of the trigger 131 result in different adjustment signals output by the positioner 132, which in turn cause the controller 150 to control the rotation speed of the drive mechanism to be different.

[0108] The adjustment signal is generally an electrical signal, such as a voltage signal or a current signal, but is not limited to these.

[0109] For example, the positioner 132 is an adjustable switching element, adjustable in either a rotary or linear sliding manner. For instance: Figure 3b As shown, the positioner 132 includes a main body 132a (generally including a resistor) and a contact 132b exposed outside the main body 132a. When the trigger 131 is displaced, the trigger 131 can drive the contact 132b to move. When the contact 132b moves to different positions, the adjustment signal output by the main body 132a is different.

[0110] like Figures 4 to 7 As shown, according to some optional embodiments, the flow valve 140 includes: a valve body 141 and a valve core 144. The valve body 141 has a first receiving cavity 145, and an opening 140a, a fluid inlet 142, and a fluid outlet 143 respectively communicating with the first receiving cavity 145. The fluid inlet 142 and the fluid outlet 143 are respectively connected to a cooling pipe 120. The valve core 144 is inserted into the first receiving cavity 145 through the opening 140a. The valve core 144 can be linked with a trigger 131, so that when the trigger 131 is displaced by an external force, it can drive the valve core 144 to move within the first receiving cavity 145. During the movement of the trigger 131 relative to the housing 110, it switches between at least a first position and a second position.

[0111] Figure 3a An exemplary partial structural schematic diagram of the cutting saw is shown when the trigger 131 is in the first position. Figure 5An exemplary schematic diagram of the internal structure of the flow valve 140 when the trigger 131 is in the first position is shown.

[0112] Figure 6 In the diagram, the dashed line represents a partial structural diagram of the cutting saw when the trigger 131 moves to the second position, and the solid line represents the trigger 131 in the first position. Figure 7 An exemplary schematic diagram of the internal structure of the flow valve 140 is shown when the trigger 131 is in the second position.

[0113] When trigger 131 is in the first position, such as Figure 6 As shown, valve core 144 blocks fluid outlet 143, preventing cooling fluid from flowing out of the first receiving cavity 145 through fluid outlet 143, and thus preventing it from flowing to saw structure 160; when trigger 131 is in the second position, as Figure 7 As shown, valve core 144 does not obstruct fluid outlet 143, and fluid outlet 143 is fully open. In this state, cooling fluid in cooling pipe 120 can enter the first receiving cavity 145 through fluid inlet 142, and then flow to saw structure 160 through fluid outlet 143. When trigger 131 is in the second position, fluid outlet 143 is fully open, resulting in the maximum fluid flow rate. When trigger 131 is between the first and second positions, valve core 144 does not completely obstruct fluid outlet 143, and fluid outlet 143 is partially open, allowing cooling fluid to flow out of fluid outlet 143. However, the fluid flow rate is between the fluid flow rate when trigger 131 is in the first and second positions.

[0114] Figure 3b An exemplary schematic diagram of the flow valve 140 is shown when the trigger 131 is between the first and second positions. At this time, the trigger 131 has just left the first position, the valve core 144 has just opened the fluid outlet 143, and cooling fluid flows out of the fluid outlet 143, but the flow rate is small.

[0115] Fluid outlet 143 is not limited to Figures 5 to 7 As shown, the fluid inlet 142 is not limited to one. In embodiments not shown in this disclosure, the fluid inlet 142 and the fluid outlet 143 may each be independently configured as two or more.

[0116] Unrestricted, when there are two or more fluid outlets 143, the blocking effect of the valve core 144 on all fluid outlets 143 can be the same or different. For example, taking two fluid outlets 143 as an example, if the blocking effect of the valve core 144 on all fluid outlets 143 is the same, then when the flow valve 140 needs to be partially opened, the valve core 144 can simultaneously partially block both fluid outlets 143; when the flow valve 140 needs to be fully opened, the valve core 144 can simultaneously not block both fluid outlets 143 at all. If the blocking effect of the valve core 144 on all fluid outlets 143 is not the same, then when the flow valve 140 needs to be partially opened, the valve core 144 can not block one fluid outlet 143 and completely block the other fluid outlet 143; when the flow valve 140 needs to be fully opened, the valve core 144 can then completely not block both fluid outlets 143, making both fluid outlets 143 fully open.

[0117] When the cutting saw 100 is turned on and put into working condition, the trigger 131 will gradually move from the first position to the second position, and the fluid flow rate will gradually increase from 0. Conversely, when the cutting saw 100 is turned off and put into non-working condition, the trigger 131 will gradually return from the second position to the first position, and the fluid flow rate will gradually decrease to 0.

[0118] In some embodiments, since both the rotational speed of the drive mechanism and the fluid flow rate are directly proportional to the displacement of the trigger 131, when the trigger 131 is in the first position and the second position, the rotational speed of the drive mechanism is between the rotational speeds of the trigger 131 in the first position and the second position, respectively. For example, when the trigger 131 is in the first position, the rotational speed of the drive mechanism is 0; when the trigger 131 is in the second position, the rotational speed of the drive mechanism reaches the maximum allowable value; and when the trigger 131 is in the first position and the second position, the rotational speed of the drive mechanism is between 0 and the maximum value.

[0119] According to some optional embodiments, trigger 131 also has a third position between the first position and the second position; when trigger 131 is in the first position, there is a gap 101 between trigger 131 and positioner 132; when trigger 131 is between the first position and the third position, trigger 131 can be linked with flow valve 140; when trigger 131 is between the third position and the second position, trigger 131 maintains linkage with valve core 144 while contacting positioner 132 to achieve linkage with positioner 132.

[0120] When the cutting saw 100 is turned on and put into working condition, as the trigger 131 moves from the first position to the second position, the trigger 131 does not initially contact the positioner 132. It only contacts the positioner 132 when the trigger 131 moves to the third position. This structure achieves the following: the trigger 131 first engages with the valve core 144 of the flow valve 140, allowing the cooling fluid to flow out first, and then engages with the positioner 132 to activate the drive mechanism—that is, cooling precedes cutting. Conversely, during the process of the trigger 131 resetting from the second position to the first position, the trigger 131 first passes through the third position and then the first position, achieving the purpose of first closing the drive mechanism and then closing the flow valve 140.

[0121] For example, the distance corresponding to the interval 101 between the trigger 131 and the positioner 132 can be used as an optional value of the second preset amount. When the movement of the trigger 131 is equal to the distance of the interval 101, the trigger 131 will contact the positioner 132, the positioner 132 will generate an adjustment signal indicating that the displacement of the trigger 131 is equal to the second preset amount, and the controller 150 will control the drive mechanism to rotate; when the movement of the trigger 131 is less than the distance of the interval 101, the trigger 131 will not contact the positioner 132, the positioner 132 will not generate an adjustment signal, indicating that the displacement of the trigger 131 is less than the second preset amount, and the controller 150 will not control the drive mechanism to rotate.

[0122] In some embodiments not shown in this disclosure, the interval 101 between the trigger 131 and the positioner 132 may not be provided. That is, when the trigger 131 is displaced, it can simultaneously drive the positioner 132 and the valve core 144 of the flow valve 140. In this case, the flow valve 140 can be opened first and then the drive mechanism can be opened using software. For example, when the trigger 131 is displaced by an external force, the positioner 132 is also displaced at the same time, but the controller 150 only controls the drive mechanism to rotate when the displacement of the trigger 131 detected by the positioner 132 is greater than or equal to a certain preset value (i.e., a value of the second preset value).

[0123] like Figures 5 to 7 As shown, according to some optional embodiments, the valve core 144 includes: a spindle 144a and a flow control element 144b. The spindle 144a is capable of being linked with the trigger 131. The flow control element 144b is connected to the spindle 144a and moves with the spindle 144a. During the movement of the flow control element 144b with the spindle 144a, it can block the fluid outlet 143.

[0124] like Figures 5 to 7As shown, the flow control element 144b surrounds the outer periphery of the spindle 144a. When the flow control element 144b obstructs the fluid outlet 143, the projection of the flow control element 144b along the axis of the fluid outlet 143 completely covers the fluid outlet 143, thereby blocking the flow outlet inside the first receiving cavity 145. When the flow control element 144b does not obstruct the fluid outlet 143 at least partially, the projection of the flow control element 144b along the axis of the fluid outlet 143 is partially or completely offset from the fluid outlet 143, allowing the cooling fluid to flow out of the first receiving cavity 145 through the fluid outlet 143.

[0125] During the movement of the spindle 144a with the trigger 131, the spindle 144a will not obstruct the fluid outlet 143 at any position except for the flow control component 144b.

[0126] like Figure 6 As shown, according to some alternative embodiments, when the trigger 131 switches between a first position and a second position, the direction of movement of the valve core 144 is perpendicular to the axis O of the fluid outlet 143. Figures 5 to 7 As shown, the movement direction of the spindle 144a is horizontal, and the axis O of the fluid outlet 143 is vertical. In embodiments not shown in this disclosure, the movement direction of the valve core 144 may also coincide with or be parallel to the axis O of the fluid outlet 143.

[0127] According to some alternative embodiments, the distance that the valve core 144 moves from the first position to the second position is linearly positively correlated with the fluid flow rate.

[0128] The cross-sectional shape of the fluid outlet 143 (the cross-section perpendicular to the axis O of the fluid outlet 143) can be a regular shape, such as a square or a rectangle. In this way, the moving distance of the valve core 144 is linearly positively correlated with the fluid flow rate. When the valve core 144 is pulled in the direction of the opening 140a, the fluid flow rate increases linearly and continuously, which is more conducive to the precise control of the fluid flow rate.

[0129] like Figures 5 to 7 As shown, according to some alternative embodiments, the flow valve 140 further includes a first elastic element 146 located within a first receiving cavity 145, the first elastic element 146 providing an elastic force for the valve core 144 to move toward the fluid outlet 143.

[0130] When the trigger 131 is moved by an external force, the valve core 144 moves from the first position to the second position, that is, the valve core 144 moves towards the opening 140a. The valve core 144 drives the flow control element 144b to gradually move away from the fluid outlet 143, and the fluid outlet 143 gradually opens to its maximum. During this process, the first elastic element 146 stores elastic force. After the external force on the trigger 131 is removed, the first elastic element 146 releases the elastic force, which can push the valve core 144 to automatically reset from the position where the fluid outlet 143 is not blocked to the position where the fluid outlet 143 is completely blocked. Therefore, the first elastic element 146 can be used to automatically reset the valve core 144, which is convenient to operate.

[0131] It is understandable that, due to the linkage between the valve core 144 and the trigger 131, during the process of the valve core 144 resetting to the position of completely blocking the fluid outlet 143 under the elastic force of the first elastic element 146, the trigger 131 will also reset to the first position as soon as possible under the influence of the elastic force.

[0132] For example, the first elastic element 146 is a spring. In some alternative embodiments, the first elastic element 146 may also be a sheet or other structure capable of providing elastic force.

[0133] like Figure 6 and Figure 7 As shown, according to some optional embodiments, the flow valve 140 further includes: a plug 148, a first gasket 149a, and a second gasket 149b. The plug 148 is inserted into a first receiving cavity 145 through an opening 140a, and the plug 148 is used to cover the opening 140a to close the first receiving cavity 145. The plug 148 has a through hole 148c for a valve core 144 to pass through, and the valve core 144 can move within the through hole 148c to switch between a first position and a second position. The first gasket 149a is connected to the plug 148; the second gasket 149b is connected to the flow control element 144b, and the first elastic element 146 is connected at both ends to the first gasket 149a and the second gasket 149b, respectively. The first gasket 149a and the second gasket 149b not only enhance the reliability of the flow valve 140 assembly, but also reduce the wear of the first elastic element 146 on the plug 148 and the flow control element 144b.

[0134] like Figure 6 and Figure 7 As shown, the plug body 148 is a hollow component. The first gasket 149a is located within the hollow cavity of the plug body 148. The inner wall of the hollow cavity has a boss 140b protruding towards the center. The opposite sides of the first gasket 149a abut against the boss 140b and one end of the first elastic member 146, respectively. The flow control member 144b has a groove 144c. The second gasket 149b is embedded in the groove 144c and abuts against the other end of the first elastic member 146.

[0135] like Figures 5 to 7 As shown, according to some optional embodiments, the flow valve 140 further includes a first seal 147. When the trigger 131 is in the first position, the first seal 147 is sealed to the spindle 144a of the valve core 144 and the inner wall of the first receiving cavity 145, respectively. The first seal 147 is used to restrict the flow of cooling fluid entering the first receiving cavity 145 through the fluid inlet 142 to the fluid outlet 143. When the trigger 131 is away from the first position, for example, when the trigger 131 is in the second position, or when the trigger 131 is between the first and second positions, there is a gap between the first seal 147 and the inner wall of the first receiving cavity 145. After the cooling fluid enters the first receiving cavity 145 from the fluid inlet 142, it can continue to flow to the fluid outlet 143 through the gap between the first seal 147 and the inner wall of the first receiving cavity 145.

[0136] like Figure 5 As shown, the first receiving cavity 145 is formed by a side wall 141a extending generally axially, a bottom wall 141b extending radially, and a connecting wall connecting the side wall 141a and the bottom wall 141b. An opening 140a is formed by the side wall 141a, and the connecting wall is at least partially inclined radially towards the axis from the side wall 141a (i.e., inclined portion 141c), located between the fluid inlet 142 and the fluid outlet 143. When the trigger 131 is in the first position, the first seal 147 is located between the fluid inlet 142 and the fluid outlet 143. The first seal 147 simultaneously compresses the inclined portion 141c of the connecting wall and the spindle 144a, achieving a sealed connection with the valve core 144 and the inner wall of the first receiving cavity 145, preventing cooling fluid from flowing to the fluid outlet 143. When the trigger 131 is removed from the first position, the first seal 147 leaves the inclined portion 141c of the connecting wall, allowing cooling fluid to flow from the fluid inlet 142 to the fluid outlet 143.

[0137] Figures 5 to 7 An O-ring is shown as an example of the first seal 147. It will be understood that the first seal 147 may also be other shapes of resilient sealing structures.

[0138] like Figures 5 to 7 As shown, according to some optional embodiments, the flow valve 140 further includes: a second seal 148a and a third seal 148b, wherein the second seal 148a is respectively sealed and connected to the inner wall of the plug body 148 and the first receiving cavity 145, and the second seal 148a is used to restrict the flow of fluid in the first receiving cavity 145 through the opening 140a; the third seal 148b is respectively sealed and connected to the plug body 148 and the spindle 144a, so as to restrict the flow of fluid in the first receiving cavity 145 through the through hole 148c.

[0139] The number of the first seal 147, the second seal 148a, and the third seal 148b can be independently set to one, two, or more, and their specific number is not intended to limit the embodiments of this disclosure. Figure 6 and Figure 7 An exemplary flow valve 140 is shown, comprising a first seal 147, two second seals 148a, and a third seal 148b.

[0140] Understandably, the second seal 148a and the third seal 148b not only prevent the fluid in the first receiving cavity 145 from flowing out, but also prevent foreign objects from entering the first receiving cavity 145. The second seal 148a and the third seal 148b further improve the overall sealing performance of the flow valve 140. Figures 5 to 7 The second seal 148a and the third seal 148b are shown as O-rings, as exemplarily. It is understood that the second seal 148a and the third seal can also be other shapes of resilient sealing structures.

[0141] In some alternative embodiments, if the plug 148 itself is elastic, the elasticity of the plug 148 can also be used to achieve a sealing connection between the plug 148 and the inner wall of the first receiving cavity 145, and / or to achieve a sealing connection between the plug 148 and the valve core 144. In this case, at least one of the second seal 148a and the third seal 148b can be removed.

[0142] It should be noted that the flow valve 140 in this embodiment is not limited to... Figure 5 Only Figure 7 The valve structure shown can also be replaced with other electronic valves that can control fluid flow, wherein the flow regulation switch of the electronic valve is linked to the trigger 131.

[0143] like Figure 2a , Figure 3a and Figure 3b As shown, according to some optional embodiments, the housing 110 has a protruding shaft 111; the trigger 131 is connected to the shaft 111 and can rotate along the axis of the shaft 111, the displacement of the trigger 131 is the rotation angle of the trigger 131; the first part 131a of the trigger 131 is connected to the valve core 144 through the linkage 133, the second part 131b of the trigger 131 is used to receive external force, the second part 131b and the first part 131a are respectively located on both sides of the shaft 111, and the second part 131b of the trigger 131 can be linked with the positioner 132.

[0144] like Figure 3bAs shown, when an external force is applied to the second part 131b of the trigger 131, during the counterclockwise rotation of the trigger 131 along the axis of the shaft 111, the first part 131a of the trigger 131 drives the valve core 144 to move, and the second part 131b of the trigger 131 drives the contact of the positioner 132 to move.

[0145] In embodiments not shown in this disclosure, trigger 131 may not be connected to valve core 144 via linkage 133; trigger 131 may be directly connected to valve core 144. Alternatively, trigger 131 may be connected to positioner 132 via linkage 133.

[0146] like Figure 3a and Figure 3b As shown, the linkage 133 can be a linkage mechanism, with both ends of the linkage connected to the first part 131a of the trigger 131 and the valve core 144, respectively. Alternatively, the linkage 133 can also be a cam structure, a gear structure, or a wire rope, or other mechanisms.

[0147] The shaft 111 can be a column integrally formed with the housing 110, or the shaft 111 can be a shaft-like part independent of the housing 110, which is fixed to the housing 110 by means of threaded connection or welding.

[0148] like Figure 3a and Figure 3b As shown, according to some optional embodiments, the cutting saw 100 further includes a second elastic member 102, the two ends of which are respectively connected to the housing 110 and the second part 131b, to provide an elastic force for the trigger 131 to return to the first position. After the external force acting on the trigger 131 is removed, the elastic force provided by the second elastic member 102 can automatically reset the trigger 131 to the first position.

[0149] Figure 3a and Figure 3b The second elastic element 102 is shown as a spring, as an example. In embodiments not shown in this disclosure, the second elastic element 102 may also be an elastic structure such as a sheet.

[0150] like Figure 2a and Figure 3a As shown, according to some alternative embodiments, the interior of the housing 110 has a protrusion 112 located above the trigger 131, and the protrusion 112 has a limiting surface 112a opposite to the trigger 131; when the trigger 131 is in the second position, the limiting surface 112a abuts against the trigger 131 to limit the trigger 131 from continuing to move.

[0151] like Figure 2bAs shown, according to some alternative embodiments, the cooling pipe 120 includes: a first pipe 121 and a second pipe 122, the first pipe 121 being connected to the fluid inlet 142 and used to deliver fluid supplied by a fluid source to the fluid inlet 142; the second pipe 122 being connected to the fluid outlet 143 and used to deliver the cooling fluid flowing through the flow valve 140 to the saw structure 160.

[0152] The first pipe 121 is used to connect to an external fluid source, and the second pipe 122 is used to transport the cooling fluid flowing out of the flow valve 140 to the saw structure 160.

[0153] Combination Figure 3b According to some alternative embodiments, housing 110 has a second receiving cavity 113 in which flow valve 140, controller 150, positioner 132 and at least a portion of cooling line 120 are located.

[0154] It is understandable that after adding the flow valve 140, the valve on the cooling pipe 120 used to control the flow of fluid (this valve is an existing valve on the cutting saw 100, located outside the second receiving cavity 113, and is generally a copper ball valve) can be retained or removed. Removing the copper ball valve can save costs. In the embodiments of this disclosure, the copper ball valve is used to control whether an external fluid source flows to the first pipe 121.

[0155] In a specific example, combined Figures 1 to 7The schematic diagram of the cutting saw structure shown is illustrated. In the cutting saw 100, the cooling pipe 120 is a water pipe, the cooling fluid is tap water, and the displacement of the trigger 131 is the rotation angle around the shaft 111. The flow valve 140 connects the outlet of the first pipe 121 and the inlet of the second pipe 122, with the outlet of the second pipe 122 facing the saw structure 160. The cutting saw 100 also has a safety button 190 and a handle, which includes a front handle 170 and a rear handle 180. The trigger 131 can only be pressed after the safety button 190 is activated. The front handle 170 is used to lift the cutting saw 100, and the rear handle 180 is used to operate the cutting saw 100. The trigger 131 is located at the grip of the rear handle 180. After clicking the protection button 190, while holding the front handle 170 with one hand and the rear handle 180 with the other, gently press the trigger 131. The trigger 131 rotates one to three degrees, connecting the water supply to the tap (tap water already has pressure), but the motor is not turned on. At this time, the valve core 144 of the flow valve 140 is partially withdrawn, the fluid outlet 143 has a small open area, and the water supply is only partially open, resulting in less water spraying onto the saw structure 160. When the trigger 131 rotates about five degrees, the positioner 132 switch (i.e., the aforementioned contact 132b) is activated, and the motor begins to rotate. At this time, due to the deeper press of the trigger 131, the valve core 144 of the flow valve 140 is withdrawn more, the fluid outlet 143 has a larger open area, the valve's internal space increases, and the water flow increases. As trigger 131 is pressed deeper, the water flow increases, and the positioner 132 sends a signal to controller 150, causing the motor speed to increase, thus increasing the rotational speed of the cutting saw 100 blades. In this example, the total rotation angle of trigger 131 is 18.8°. When trigger 131 is released, the motor is first de-energized, followed by the closing of flow valve 140, which then disconnects the cooling water flow. By controlling the cooling water flow rate through changes in the depth of trigger 131 pressure, the water output can be precisely controlled. Combined with an adjustable-speed motor, pressing trigger 131 increases motor speed and water spray volume, enhancing the intelligence and ease of operation of the cutting saw 100.

[0156] Without conflict, different embodiments or different technical features of this disclosure can be arbitrarily combined to form new embodiments.

[0157] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of the present invention and do not limit the scope of protection of this patent.

Claims

1. A cutting saw, characterized in that, The cutting saw (100) includes: Casing (110); A handle is attached to the housing (110) and is used at least to lift the cutting saw (100). A saw structure (160) is connected to the housing (110). A drive mechanism provides the driving force to rotate the saw structure (160); Cooling pipes (120) supply cooling fluid to the saw structure (160); An adjustment component (130) is movably connected to the housing (110). The adjustment component (130) is used to adjust the flow rate of the cooling fluid flowing out of the cooling pipe (120). The displacement of the adjustment component (130) relative to the housing (110) under the action of an external force satisfies a first positive proportional relationship with the flow rate of the fluid. A controller (150) is connected to the adjustment component (130) and the drive mechanism respectively. The controller (150) is used to control the rotational speed of the drive mechanism according to the displacement, wherein the displacement and the rotational speed of the drive mechanism satisfy a second direct proportional relationship.

2. The cutting saw according to claim 1, characterized in that, When the displacement is equal to or greater than the second preset amount, the controller (150) controls the drive mechanism to rotate; wherein, when the displacement is less than the second preset amount, the upper limit of the fluid flow rate is less than the first preset amount, the lower limit of the fluid flow rate is greater than or equal to 0, and the first preset amount is greater than 0.

3. The cutting saw according to claim 1 or 2, characterized in that, The adjustment component (130) includes: A trigger (131) that generates the displacement under the action of the external force; A flow valve (140) is capable of being linked with the trigger (131) to change the flow rate of the cooling fluid flowing out of the cooling pipe (120) through the flow valve (140); A positioner (132) is linked with the trigger (131) to generate different adjustment signals as the displacement changes, wherein the controller (150) controls the rotational speed of the drive mechanism according to the adjustment signals.

4. The cutting saw according to claim 3, characterized in that, The flow valve (140) includes: The valve body (141) has a first receiving cavity (145), and an opening (140a), a fluid inlet (142) and a fluid outlet (143) respectively communicating with the first receiving cavity (145), the fluid inlet (142) and the fluid outlet (143) respectively communicating with the cooling pipe (120); A valve core (144) is inserted into the first receiving cavity (145) through the opening (140a), and the valve core (144) can be linked with the trigger (131); The trigger (131) switches between at least a first position and a second position during its movement relative to the housing (110); When the trigger (131) is in the first position, the valve core (144) blocks the fluid outlet (143). When the trigger (131) is in the second position, the valve core (144) does not block the fluid outlet (143), so that the fluid outlet (143) is fully open; When the trigger (131) is between the first position and the second position, the valve core (144) partially blocks the fluid outlet (143), and the fluid outlet (143) is partially open.

5. The cutting saw according to claim 4, characterized in that, The trigger (131) also has a third position located between the first position and the second position; When the trigger (131) is in the first position, there is a gap between the trigger (131) and the positioner (132); When the trigger (131) is located between the first position and the third position, the trigger (131) can be linked with the flow valve (140); When the trigger (131) is between the third position and the second position, the trigger (131) remains linked with the valve core (144) and contacts the positioner (132) to achieve linkage with the positioner (132).

6. The cutting saw according to claim 4, characterized in that, The valve core (144) includes: The spindle (144a) is capable of being linked with the trigger (131); A flow control element (144b) is connected to the mandrel (144a) and moves with the mandrel (144a). The flow control element (144b) can block the fluid outlet (143) during the movement of the mandrel (144a).

7. The cutting saw according to claim 4, characterized in that, When the trigger (131) switches between the first position and the second position, the movement direction of the valve core (144) is perpendicular to the axis of the flow outlet.

8. The cutting saw according to claim 4, characterized in that, The distance the valve core (144) moves from the first position to the second position is linearly positively correlated with the fluid flow rate.

9. The cutting saw according to claim 6, characterized in that, The flow valve (140) also includes: A first elastic element (146) is located within the first receiving cavity (145), and the first elastic element (146) provides the valve core (144) with an elastic force that moves it toward the fluid outlet (143).

10. The cutting saw according to claim 9, characterized in that, The flow valve (140) also includes: A plug (148) is inserted into the first receiving cavity (145) through the opening (140a), and the plug (148) has a through hole (148c) for the valve core (144) to pass through. The first gasket (149a) is connected to the plug (148). The second gasket (149b) is connected to the flow control element (144b), and the first elastic element (146) is connected at both ends to the first gasket (149a) and the second gasket (149b).

11. The cutting saw according to claim 4, characterized in that, The flow valve (140) also includes: When the trigger (131) is in the first position, the first seal (147) is sealed to the inner wall of the valve core (144) and the first receiving cavity (145) respectively. The first seal (147) is used to restrict the flow of cooling fluid entering the first receiving cavity (145) through the fluid inlet (142) to the fluid outlet (143).

12. The cutting saw according to claim 10, characterized in that, The flow valve (140) also includes: The second seal (148a) is respectively sealed to the inner walls of the plug (148) and the first receiving cavity (145), and the second seal (148a) is used to restrict the flow of fluid in the first receiving cavity (145) through the opening; and / or, The third seal (148b) is respectively sealed to the plug body (148) and the mandrel (144a) to restrict the fluid in the first receiving cavity (145) from flowing out through the through hole (148c).

13. The cutting saw according to claim 4, characterized in that, The housing (110) has a protruding shaft (111); the trigger (131) is connected to the shaft (111) and is rotatable along the axis of the shaft (111), the displacement of the trigger (131) being the rotation angle of the trigger (131). The first part (131a) of the trigger (131) is connected to the valve core (144), or the first end of the trigger (131) is connected to the valve core (144) through a linkage (133). The second part (131b) of the trigger (131) is used to receive external force, and the second part (131b) and the first part (131a) are located on both sides of the shaft (111).

14. The cutting saw according to claim 13, characterized in that, The second part (131b) of the trigger (131) can be linked with the positioner (132).

15. The cutting saw according to claim 13, characterized in that, The cutting saw (100) also includes: The second elastic element (102) is connected at both ends to the housing (110) and the second part (131b) respectively, to provide the trigger (131) with an elastic force to return to the first position.

16. The cutting saw according to claim 4, characterized in that, The interior of the housing (110) has a protruding portion, which has a limiting surface (112) opposite to the trigger (131). When the trigger (131) is in the second position, the limiting surface (112) abuts against the trigger (131) to limit the trigger (131) from continuing to move.

17. The cutting saw according to claim 4, characterized in that, The cooling pipe (120) includes: A first pipeline (121) is connected to the fluid inlet (142), and the first pipeline (121) is used to transport the fluid provided by the fluid source to the fluid inlet (142). The second pipe (122) is connected to the fluid outlet (143) and is used to deliver the cooling fluid flowing through the flow valve (140) to the saw structure (160).

18. The cutting saw according to claim 3, characterized in that, The housing (110) has a second receiving cavity (113) in which the flow valve (140), the controller (150), the positioner (132) and at least a portion of the cooling pipe (120) are located.

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