Cutting saw

Abstract

The utility model relates to a cutting saw. The cutting saw comprises a shell, a saw structure, a driving mechanism, a cooling pipeline, an adjusting assembly and a controller. The driving mechanism is connected with the shell and provides driving force for driving the saw structure to rotate. The cooling pipeline is used for conveying cooling fluid to the saw structure; the adjusting assembly is connected to the shell, and the adjusting assembly can move relative to the shell under the action of external force so as to adjust the fluid flow of the cooling fluid flowing out of the cooling pipeline; the controller is connected to the driving mechanism; the controller is used for controlling the driving mechanism to rotate in response to the situation that the fluid flow is larger than or equal to a first preset amount, and the first preset amount is larger than 0. According to the cutting saw, it is guaranteed that the cooling fluid is closed or opened in time, and operation of the cutting saw is also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electric machines, in particular to a cutting saw. Background Art

[0002] As an electric cutting tool, cutting saws are widely used. For example, cutting saws can be used to cut building materials. When cutting, cooling water is generally connected to assist cutting, reduce dust, and cool the cutting wheel of the cutting saw. Cooling water is provided to the cutting wheel through a cooling water circuit. The cooling water circuit generally includes a water pipe and a valve that controls the on and off of the cooling water. The valve is generally located at the water inlet end of the water pipe and outside the housing of the cutting saw. At present, when manually operating a cutting saw, the weight of the cutting saw is large, the valve operating force is large, the use is inconvenient, and the valve needs to be opened and closed frequently. If you forget to open the valve, the dust generated by the cutting will take a long time to dissipate, and the cutting blade may be damaged; moreover, forgetting to close the valve will waste water resources, affect the life of the product, and make the working environment slippery and dangerous. Utility Model Content

[0003] Problems to be solved by utility models

[0004] In view of the above problem that it is easy to forget to turn on or off the cooling water and the cutting saw is inconvenient to operate, the present disclosure provides a cutting saw.

[0005] Solutions for solving problems

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

[0007] case;

[0008] Saw structure;

[0009] A driving mechanism, connected to the housing and providing a driving force for driving the saw structure to rotate;

[0010] a cooling line for delivering cooling fluid to the saw structure;

[0011] an adjusting component connected to the housing, wherein the adjusting component can be displaced relative to the housing under the action of an external force to adjust the fluid flow rate of the cooling fluid flowing out of the cooling pipeline;

[0012] A controller connected to the driving mechanism;

[0013] The controller is used to control the driving mechanism to rotate in response to the fluid flow being greater than or equal to a first preset amount, wherein the first preset amount is greater than 0.

[0014] Optionally, the relationship between the displacement of the regulating component relative to the housing and the fluid flow rate, and the relationship between the fluid flow rate and the rotational speed of the driving mechanism both satisfy a directly proportional relationship.

[0015] Optionally, the controller is used to: control the rotation of the driving mechanism in response to the displacement of the adjusting component being equal to or greater than a second preset amount; wherein, when the displacement is less than the second preset amount, the upper limit value of the fluid flow rate is less than the first preset amount, and the lower limit value of the fluid flow rate is greater than or equal to 0.

[0016] Optionally, the adjustment component includes:

[0017] a trigger, wherein the trigger generates the displacement under the action of the external force;

[0018] a flow valve, the flow valve being capable of being linked with the trigger to change the fluid flow rate of the cooling fluid flowing out of the cooling pipeline through the flow valve;

[0019] A positioner, the positioner can be linked with the trigger to generate different adjustment signals as the displacement changes, wherein the controller controls the rotation speed of the drive mechanism according to the adjustment signal.

[0020] Optionally, the flow valve comprises:

[0021] A valve body having a first accommodating cavity, and an opening, a fluid inlet, and a fluid outlet respectively communicated with the first accommodating cavity, wherein the fluid inlet and the fluid outlet are respectively communicated with the cooling pipeline;

[0022] A valve core is inserted into the first accommodating cavity from the opening, and the valve core can be linked with the trigger;

[0023] The trigger switches between at least a first position and a second position during movement relative to the housing;

[0024] When the trigger is in the first position, the valve core blocks the fluid outlet;

[0025] 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;

[0026] When the trigger is between the first position and the second position, the valve core partially blocks the fluid outlet and the fluid outlet is partially open.

[0027] Optionally, the trigger further has a third position between the first position and the second position;

[0028] When the trigger is in the first position, there is a gap between the trigger and the positioner;

[0029] When the trigger is located between the first position and the third position, the trigger can be linked with the flow valve;

[0030] When the trigger is between the third position and the second position, the trigger keeps being linked with the valve core and contacts with the positioner to realize linkage with the positioner.

[0031] Optionally, the valve core comprises:

[0032] A spindle capable of being linked with the trigger;

[0033] A flow control member is connected to the core shaft and moves with the movement of the core shaft. The flow control member can block the fluid outlet during the movement of the core shaft.

[0034] 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 fluid outlet.

[0035] The distance that the valve core moves from the first position to the second position satisfies a linear positive correlation with the fluid flow rate.

[0036] Optionally, the flow valve further includes:

[0037] The first elastic member is located in the first accommodating cavity, and the first elastic member provides an elastic force for the valve core to move toward the fluid outlet.

[0038] Optionally, the flow valve further includes:

[0039] A plug body is inserted into the first accommodating cavity from the opening, and the plug body has a through hole for the valve core to pass through;

[0040] a first gasket connected to the plug body;

[0041] The second gasket is connected to the flow control member, and two ends of the first elastic member are respectively connected to the first gasket and the second gasket.

[0042] Optionally, the flow valve further includes:

[0043] A first sealing member, when the trigger is in the first position, the first sealing member is sealedly connected to the valve core and the inner wall of the first accommodating chamber respectively, and the first sealing member is used to limit the cooling fluid entering the first accommodating chamber through the fluid inlet from flowing to the fluid outlet.

[0044] Optionally, the flow valve further includes:

[0045] a second sealing member, respectively sealingly connected to the plug body and the inner wall of the first accommodating chamber, the second sealing member being used to limit the fluid in the first accommodating chamber from flowing out through the opening; and / or,

[0046] The third sealing member is respectively sealed and connected to the plug body and the core shaft to limit the fluid in the first accommodating chamber from flowing out through the through hole.

[0047] Optionally, the housing has a protruding shaft; the trigger is connected to the shaft and can rotate along the axis of the shaft, and the displacement of the trigger is the rotation angle of the trigger;

[0048] 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;

[0049] The second part of the trigger is used to receive external force, and the second part and the first part are respectively located on both sides of the shaft.

[0050] Optionally, the second portion of the trigger can be linked to the positioner.

[0051] Optionally, the cutting saw further comprises:

[0052] The second elastic member has two ends respectively connected to the housing and the second part to provide elastic force for the trigger to return to the first position.

[0053] Optionally, the housing has a protruding portion inside, and the protruding portion has a limiting surface opposite to the trigger;

[0054] When the trigger is in the second position, the limiting surface abuts against the trigger to limit the trigger from further displacement.

[0055] Optionally, the cooling circuit includes:

[0056] A first pipeline connected to the fluid inlet, the first pipeline being used to transport the fluid provided by the fluid source to the fluid inlet;

[0057] A second pipeline is connected to the fluid outlet, and the second pipeline is used to transport the cooling fluid flowing through the flow valve to the saw structure.

[0058] Optionally, the shell has a second accommodating chamber, and the flow valve, the controller, the positioner and at least a portion of the cooling pipeline are located in the second accommodating chamber.

[0059] Effect of utility model

[0060] In the disclosed embodiment, the cooling fluid can be turned on and off and the flow rate can be adjusted by operating the adjustment component and applying an external force to the adjustment component. If the fluid flow rate is greater than or equal to the first preset amount, it indicates that the cooling fluid has flowed to the saw structure. At this time, the controller controls the drive mechanism to achieve cooling before cutting, further reducing the dust generated by cutting. Moreover, by operating the same adjustment component, both the flow rate of the cooling fluid and the control of the drive mechanism are achieved, so that the opening or closing of the cooling fluid is linked to the opening or closing of the drive mechanism. Once the drive mechanism is started, the cooling fluid will definitely be turned on, and after the drive mechanism is turned off, the cooling fluid will eventually be turned off, which not only ensures the timely closing or opening of the cooling fluid, but also facilitates the operation of the cutting saw. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the structure of a cutting saw in an optional embodiment of the present disclosure;

[0062] Figure 2a for Figure 1 A schematic diagram of the structure of a cutting saw with a portion of the housing removed, wherein the trigger is in a first position;

[0063] Figure 2b for Figure 2a Enlarged view of point A in the middle;

[0064] Figure 3a for Figure 2a The enlarged view of point B in the middle;

[0065] Figure 3b A schematic diagram of a portion of the structure of the cutting saw is shown when the trigger is in a first position and a second position respectively;

[0066] Figure 4 for Figure 2a , a schematic diagram of the overall structure of the flow valve when the trigger is in the first position;

[0067] Figure 5 for Figure 4 Cross-sectional view of a medium flow valve;

[0068] Figure 6 for Figure 2a , a cross-sectional view of the flow valve when the trigger is in the second position;

[0069] Figure 7 for Figure 2a , a cross-sectional view of the flow valve when the trigger is between the first position and the second position.

[0070] Description of Reference Numerals

[0071] 100, cutting saw; 101, interval between trigger and positioner; 102, second elastic member;

[0072] 110, housing; 111, shaft; 112, protruding portion; 112a, limiting surface; 113, second accommodating chamber;

[0073] 120, cooling pipeline; 121, first pipeline; 122, second pipeline;

[0074] 130, adjustment assembly; 131, trigger; 131a, first part; 131b, second part; 132, positioner; 132a, main body; 132b, tentacle; 133, linkage;

[0075] 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, core shaft; 144b, flow control member; 144c, groove; 145, first accommodating chamber; 146, first elastic member; 147, first sealing member; 148, plug body; 148a, second sealing member; 148b, third sealing member; 148c, through hole; 149a, first gasket; 149b, second gasket;

[0076] 150. Controller;

[0077] 160. saw structure; 161. saw blade; 162. rotating shaft;

[0078] 170. Front handle;

[0079] 180, rear handle;

[0080] 190. Protect button. DETAILED DESCRIPTION

[0081] In order to make the technical solutions and beneficial effects of the utility model more obvious and easy to understand, the following is a detailed description by listing specific embodiments. The 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 belongs.

[0082] In the description of the present invention, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present invention, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present invention.

[0083] In the present invention, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly include at least one of the features. In the description of the present invention, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly defined, the terms "install", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present utility model, unless otherwise clearly defined, a first feature being “on”, “above”, “above”, “below”, “below”, “below” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact through an intermediate medium. Moreover, a first feature being “on”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0086] Figure 1 and Figure 2a The structural schematic diagram of a cutting saw is shown exemplarily.

[0087] like Figure 1 and Figure 2aAs shown, the cutting saw 100 provided in the embodiment of the present disclosure includes: a housing 110, a saw structure 160, a driving mechanism, a cooling circuit 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 driving mechanism can drive the rotating shaft 162 to rotate, and the rotating rotating shaft 162 in turn drives the saw blade 161 to rotate. The driving mechanism includes a transmission device and a driving source (generally a motor), and the driving force provided by the driving source is transmitted to the rotating shaft 162 of the saw structure 160 through the transmission device. The cooling circuit 120 can be connected to an external cooling source, and conduct the space where the cooling source and the saw structure 160 are located, so as to transport cooling fluid to the saw structure 160. The adjustment assembly 130 is connected to the housing 110. When the user operates the adjustment assembly 130, an external force is applied to the adjustment assembly 130. The adjustment assembly 130 is displaced relative to the housing 110 under the action of the external force. The displacement of the adjustment assembly 130 is different, and the fluid flow rate of the cooling fluid flowing out of the cooling pipeline 120 is also different. In other words, the fluid flow rate flowing to the saw structure 160 can be adjusted by the displacement of the adjustment assembly 130. The controller 150 is connected to the driving mechanism, and the controller 150 is used to: in response to the fluid flow rate being greater than or equal to a first preset amount, control the driving mechanism to rotate, wherein the first preset amount is greater than 0.

[0088] It is understandable that when the cutting saw 100 is in a non-working state, that is, when the cutting saw 100 is not operated (the displacement of the adjustment component 130 relative to the housing 110 is 0), the cooling pipeline 120 cannot provide cooling liquid to the saw structure 160, that is, the fluid flow rate is 0; and after an external force is applied to the adjustment component 130 to cause the adjustment component 130 to be displaced, the cooling fluid can flow to the saw structure 160. After the displacement of the adjustment component 130 relative to the housing 110 is cancelled (that is, the adjustment component 130 is not displaced relative to the housing 110), the fluid flow rate can be restored to 0, and the cooling fluid is turned off. Therefore, by adjusting the displacement of the adjustment component 130, the flow rate can be adjusted and the cooling fluid can be turned on and off. The rotation of the driving mechanism means the rotation of the saw structure 160, indicating that the cutting saw 100 enters the working state. The stopping of the driving mechanism means that the saw structure 160 stops rotating, indicating that the cutting saw 100 stops working.

[0089] The fluid flow rate being greater than or equal to the first preset amount indicates that cooling fluid has flowed to the saw structure 160. At this time, the controller 150 controls the driving mechanism to rotate, thereby achieving cooling before cutting, and further reducing dust generated by cutting.

[0090] After the adjustment component 130 is displaced, the fluid flow rate will be less than the first preset amount, the driving mechanism stops rotating, and the cutting saw 100 stops 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.

[0091] The controller 150 is also used to control the driving mechanism to stop rotating in response to the fluid flow being less than a first preset amount. Since the first preset amount is greater than 0, the fluid flow may not be 0 after the driving mechanism stops, thereby stopping cutting before shutting off the cooling fluid, ensuring that the cooling fluid flows to the saw structure 160 during the entire cutting process.

[0092] In summary, in the embodiment of the present disclosure, the flow control of the cooling fluid and the control of the driving mechanism can be achieved by operating the same adjustment component 130, and the opening of the cooling fluid and the opening of the driving mechanism are linked, and the closing of the cooling fluid and the closing of the driving mechanism are also linked. Once the driving mechanism is started, the cooling fluid will definitely be turned on, and once the driving mechanism is turned off, the cooling fluid will definitely be turned off, which not only ensures the timely closing or opening of the cooling fluid, but also facilitates the operation of the cutting saw 100.

[0093] The displacement of the adjustment component 130 relative to the housing 110 can be a linear displacement or a curved rotation displacement. When the adjustment component 130 is subjected to an external force, the displacement direction of the adjustment component 130 is opposite to the direction of canceling the displacement of the adjustment component 130.

[0094] The first preset amount is greater than 0 but less than or equal to the maximum allowable flow rate of the cooling pipeline 120. The maximum allowable flow rate here refers to the maximum volume flow rate passing through the fluid outlet 143 per unit time. The specific value of the first preset amount can be selected by those skilled in the art as needed.

[0095] Figure 1 and Figure 2a In the embodiment shown, the cooling fluid is water. It is understood that the cooling fluid can also be other liquids besides water, or the cooling fluid can also be a gas flow, such as an air flow.

[0096] The external cooling source can be a water pipe connected to tap water or a box storing cooling fluid. If the cooling fluid provided by the external cooling source has a certain pressure (the pressure is generally less than 0.5MPa), there is no need to set up a pump structure, and the pressure provided by the external cooling source can be used to achieve cooling fluid transportation. For example: Figure 1 and Figure 2a In the embodiment shown, the external cooling source is a water pipe, which is directly connected to the water inlet interface of the cooling pipeline 120. After the adjustment component 130 is displaced relative to the housing 110, the pressure of the tap water can be used to spray it toward the saw structure 160. If the external cooling source cannot provide pressure, a pump structure can also be added to spray the cooling fluid toward the saw structure 160 using the pressure provided by the pump structure.

[0097] Optionally, the controller 150 is connected to the regulating assembly 130 so that the controller 150 obtains information that can characterize the fluid flow rate from the regulating assembly 130. It is understandable that the controller 150 may not be connected to the regulating assembly 130, and an additional flow detection device (e.g., flow meter) may be used to detect the fluid flow rate, and the controller 150 is connected to the flow detection device to obtain information that can characterize the fluid flow rate from the flow detection device.

[0098] 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 rotation speed of the driving mechanism both satisfy a directly proportional relationship.

[0099] The speed of the drive mechanism refers to the speed of the drive source (usually a motor).

[0100] The greater the displacement of the adjustment component 130 relative to the housing 110, the greater the fluid flow rate and the greater the speed of the driving mechanism. Conversely, the smaller the displacement of the adjustment component 130 relative to the housing 110, the smaller the fluid flow rate and the smaller the speed of the driving mechanism. When the displacement of the adjustment component 130 relative to the housing 110 is 0, the cooling fluid is in a closed state and the driving mechanism stops rotating.

[0101] Optionally, the displacement of the regulating component 130 can represent the fluid flow rate, and the controller 150 can determine whether to control the driving mechanism to rotate according to the displacement. Furthermore, the above-mentioned positive proportional relationship can be further understood as: the displacement of the regulating component 130 relative to the housing 110 under the action of an external force satisfies a first positive proportional relationship with the fluid flow rate, and the displacement of the regulating component 130 satisfies a second positive proportional relationship with the rotation speed of the driving mechanism.

[0102] The first direct proportional relationship and the second direct proportional relationship may be two identical or different functional relationships.

[0103] According to some optional embodiments, the controller 150 is used to: control the rotation of the driving mechanism in response to the displacement of the adjustment 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 value of the fluid flow rate is less than the first preset amount, and the lower limit value of the fluid flow rate is greater than or equal to 0.

[0104] When the displacement of the regulating 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.

[0105] For example, a displacement measuring device (eg, a displacement sensor) for measuring the displacement of the adjustment assembly 130 may be provided in the cutting saw 100, and the controller 150 controls the driving mechanism by obtaining the displacement measured by the displacement measuring device.

[0106] The second preset amount can be set as needed. For example, if the displacement is a rotational displacement of a curved path, the second preset amount can be 3°, 5°, 8° or 10°.

[0107] 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, wherein the trigger 131 is used to receive an external force to generate the above-mentioned displacement under the action of the external force; the flow valve 140 can be linked with the trigger 131, and when the trigger 131 is displaced by an external force, the flow valve 140 can be opened, and the fluid flow rate of the cooling fluid flowing out of the cooling pipeline 120 through the flow valve 140 can be changed; the positioner 132 can be linked with the trigger 131 to generate different adjustment signals as the displacement changes, wherein the controller 150 controls the rotation speed according to the adjustment signal.

[0108] The positioner 132 is used to detect the displacement of the trigger 131. When the displacement of the trigger 131 is different, the adjustment signal output by the positioner 132 is different, and thus the controller 150 controls the rotation speed of the driving mechanism to be different.

[0109] The regulation signal is generally an electrical signal, such as a voltage signal or a current signal, but is not limited thereto.

[0110] For example, the positioner 132 is an adjustable switch element, and the adjustable mode includes a rotation mode or a linear sliding mode. Figure 3b As shown, the positioner 132 includes a main body 132a (generally including a resistor) and a tentacle 132b exposed outside the main body 132a. When the trigger 131 is displaced, the trigger 131 can drive the tentacle 132b to move. When the tentacle 132b moves to different positions, the adjustment signal output by the main body 132a is different.

[0111] 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 accommodating chamber 145, and an opening 140a, a fluid inlet 142 and a fluid outlet 143 respectively connected to the first accommodating chamber 145, and the fluid inlet 142 and the fluid outlet 143 are respectively connected to the cooling pipeline 120; the valve core 144 is inserted into the first accommodating chamber 145 from the opening 140a, and the valve core 144 can be linked with the trigger 131, and then the trigger 131 can drive the valve core 144 to move in the first accommodating chamber 145 when it is displaced by an external force. The trigger 131 switches between at least the first position and the second position during the movement relative to the housing 110.

[0112] Figure 3a The schematic diagram of the partial structure of the cutting saw when the trigger 131 is in the first position is shown as an example. Figure 5The schematic diagram of the structure inside the flow valve 140 when the trigger 131 is in the first position is exemplarily shown.

[0113] Figure 6 In the figure, the dotted line represents a schematic diagram of a partial structure of the cutting saw when the trigger 131 moves to the second position, and the solid line represents that the trigger 131 is in the first position. Figure 7 The schematic diagram of the structure inside the flow valve 140 when the trigger 131 is in the second position is exemplarily shown.

[0114] When the trigger 131 is in the first position, Figure 6 As shown, the valve core 144 blocks the fluid outlet 143, and the cooling fluid cannot flow out of the first accommodating chamber 145 through the fluid outlet 143, and further cannot flow to the saw structure 160; when the trigger 131 is in the second position, as shown in FIG. Figure 7 As shown, the valve core 144 does not block the fluid outlet 143, and the fluid outlet 143 is completely open. At this time, the cooling fluid in the cooling pipeline 120 can enter the first accommodating chamber 145 through the fluid inlet 142, and then flow to the saw structure 160 through the fluid outlet 143. When the trigger 131 is in the second position, the fluid outlet 143 is completely open, so the fluid flow rate is maximum. When the trigger 131 is between the first position and the second position, the valve core 144 does not completely block the fluid outlet 143, and the fluid outlet 143 is partially open. The cooling fluid can flow out of the fluid outlet 143, but the fluid flow rate is between the fluid flow rate when the trigger 131 is between the first position and the second position.

[0115] Figure 3b The schematic diagram of the structure of the flow valve 140 is exemplarily shown when the trigger 131 is between the first position and the second position. At this time, the trigger 131 has just left the first position, the valve core 144 has just opened the fluid outlet 143, and the fluid outlet 143 has cooling fluid flowing out, but the flow rate is small.

[0116] The fluid outlet 143 is not limited to Figures 5 to 7 The fluid inlet 142 is not limited to one. In an embodiment not shown in the present disclosure, the fluid inlet 142 and the fluid outlet 143 can be independently set to two or more.

[0117] Without limitation, when the number of fluid outlets 143 is two or more, the shielding effect of the valve core 144 on all fluid outlets 143 may be the same or different. For example, taking two fluid outlets 143 as an example, if the shielding 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 partially shield the two fluid outlets 143 at the same time; when the flow valve 140 needs to be fully opened, the valve core 144 does not shield the two fluid outlets 143 at all. If the shielding 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 may not shield one of the fluid outlets 143 and completely shield the other fluid outlet 143; when the flow valve 140 needs to be fully opened, the valve core 144 does not shield the two fluid outlets 143 at all, so that the two fluid outlets 143 are fully open.

[0118] When the cutting saw 100 is turned on and put into working state, 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 state, the trigger 131 will gradually return to the first position from the second position, and the fluid flow rate will gradually decrease to 0.

[0119] In some embodiments, since the rotation speed of the driving mechanism and the fluid flow rate are both in direct proportion to the displacement of the trigger 131, when the trigger 131 is between the first position and the second position, the rotation speed of the driving mechanism is between the rotation speeds when the trigger 131 is respectively in the first position and the second position. For example, when the trigger 131 is in the first position, the rotation speed of the driving mechanism is 0; when the trigger 131 is in the second position, the rotation speed of the driving mechanism reaches the maximum value allowed; when the trigger 131 is between the first position and the second position, the rotation speed of the driving mechanism is between 0 and the maximum value.

[0120] According to some optional embodiments, the trigger 131 also has a third position between the first position and the second position; when the trigger 131 is in the first position, there is a gap 101 between the trigger 131 and the positioner 132; when the trigger 131 is 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 maintains linkage with the valve core 144 and contacts with the positioner 132 to achieve linkage with the positioner 132.

[0121] When the cutting saw 100 is turned on and the cutting saw 100 enters the working state, when the trigger 131 moves from the first position to the second position, the trigger 131 does not contact the positioner 132 first, and only contacts the positioner 132 when it moves to the third position. This structure realizes that the trigger 131 first links with the valve core 144 of the flow valve 140 to make the cooling fluid flow out first, and then links with the positioner 132 to start the driving mechanism, that is, cooling first and then cutting. Conversely, when the trigger 131 is reset from the second position to the first position, the trigger 131 will first pass through the third position and then pass through the first position, realizing the purpose of first closing the driving mechanism and then closing the flow valve 140.

[0122] Exemplarily, 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 amount of the trigger 131 is equal to the distance of the interval 101, the trigger 131 will contact the positioner 132, and the positioner 132 will generate an adjustment signal, indicating that the displacement amount of the trigger 131 is equal to the second preset amount, and the controller 150 controls the driving mechanism to rotate; when the movement amount of the trigger 131 is less than the distance of the interval 101, the trigger 131 will not contact the positioner 132, and the positioner 132 will not generate an adjustment signal, indicating that the displacement amount of the trigger 131 is less than the second preset amount, and the controller 150 will not control the driving mechanism to rotate.

[0123] In some embodiments not shown in the present disclosure, the interval 101 may not be set between the trigger 131 and the positioner 132, that is, when the trigger 131 is displaced, the positioner 132 and the valve core 144 of the flow valve 140 can be linked at the same time. At this time, the flow valve 140 can be opened first and then the driving mechanism can be opened in combination with 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 does not control the driving mechanism to rotate until 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 amount).

[0124] like Figures 5 to 7 As shown, according to some optional embodiments, the valve core 144 includes: a core shaft 144a and a flow control member 144b, the core shaft 144a can be linked with the trigger 131; the flow control member 144b is connected to the core shaft 144a and moves with the movement of the core shaft 144a, and the flow control member 144b can block the fluid outlet 143 during the movement of the core shaft 144a.

[0125] like Figures 5 to 7As shown, the flow control member 144b surrounds the outer circumference of the core shaft 144a. When the flow control member 144b blocks the fluid outlet 143, the projection of the flow control member 144b along the axis of the fluid outlet 143 completely covers the fluid outlet 143, and then the flow control member 144b can block the flow outlet inside the first accommodating chamber 145. When the flow control member 144b does not at least partially block the fluid outlet 143, the projection of the flow control member 144b along the axis of the fluid outlet 143 is partially or completely offset from the fluid outlet 143, so that the cooling fluid flows out of the first accommodating chamber 145 through the fluid outlet 143.

[0126] When the core shaft 144 a moves with the trigger 131 , other positions of the core shaft 144 a except the flow control member 144 b will not block the fluid outlet 143 .

[0127] like Figure 6 As shown, according to some optional embodiments, 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 O of the fluid outlet 143. Figures 5 to 7 As shown, the moving direction of the core shaft 144a is horizontal, and the axis O of the fluid outlet 143 is vertical. In embodiments not shown in the present disclosure, the moving direction of the valve core 144 may also coincide with or be parallel to the axis O of the fluid outlet 143.

[0128] According to some optional embodiments, the distance that the valve core 144 moves from the first position to the second position satisfies a linear positive correlation with the fluid flow rate.

[0129] The cross-section 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, so that the moving distance of the valve core 144 is linearly positively correlated with the fluid flow rate. When the valve core 144 is pulled toward the opening 140a, the fluid flow rate continues to increase linearly, which is more conducive to the precise control of the fluid flow rate.

[0130] like Figures 5 to 7 As shown, according to some optional embodiments, the flow valve 140 further includes: a first elastic member 146 located in the first accommodating chamber 145 , and the first elastic member 146 provides an elastic force for the valve core 144 to move toward the fluid outlet 143 .

[0131] 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 toward the opening 140a, and the valve core 144 drives the flow control member 144b to gradually move away from the fluid outlet 143, and the fluid outlet 143 gradually opens to the maximum. During this process, the first elastic member 146 stores elastic force. After the external force on the trigger 131 is removed, the first elastic member 146 releases the elastic force, and the elastic force can push the valve core 144 to automatically reset from a position that does not completely block the fluid outlet 143 to a position that completely blocks the fluid outlet 143. Therefore, the valve core 144 can be automatically reset by using the first elastic member 146, which is easy to operate.

[0132] It is understandable that, since the valve core 144 and the trigger 131 are linked, when the valve core 144 is reset to the position completely blocking the fluid outlet 143 under the elastic force of the first elastic member 146, the trigger 131 will also be reset to the first position as soon as possible under the influence of the elastic force.

[0133] Exemplarily, the first elastic member 146 is a spring. In some optional embodiments, the first elastic member 146 may also be a spring sheet or other structure capable of providing elastic force.

[0134] like Figure 6 and Figure 7 As shown, according to some optional embodiments, the flow valve 140 further includes: a plug body 148, a first gasket 149a and a second gasket 149b. The plug body 148 is inserted into the first accommodating chamber 145 from the opening 140a, and the plug body 148 is used to cover the opening 140a to close the first accommodating chamber 145. The plug body 148 has a through hole 148c for the valve core 144 to pass through, and the valve core 144 can move in the through hole 148c to achieve switching between the first position and the second position. The first gasket 149a is connected to the plug body 148; the second gasket 149b is connected to the flow control member 144b, and the two ends of the first elastic member 146 are respectively connected to the first gasket 149a and the second gasket 149b. The first gasket 149a and the second gasket 149b can not only enhance the reliability of the assembly of the flow valve 140, but also reduce the wear of the first elastic member 146 on the plug body 148 and the flow control member 144b.

[0135] like Figure 6 and Figure 7 As shown, the plug body 148 is a hollow member, the first gasket 149a is located in the hollow cavity of the plug body 148, the inner wall of the hollow cavity has a boss 140b protruding toward the center, and the opposite sides of the first gasket 149a are respectively in contact with the boss 140b and one end of the first elastic member 146. The flow control member 144b has a groove 144c, and the second gasket 149b is embedded in the groove 144c and in contact with the other end of the first elastic member 146.

[0136] like Figures 5 to 7 As shown, according to some optional embodiments, the flow valve 140 further includes: a first sealing member 147. When the trigger 131 is in the first position, the first sealing member 147 is sealedly connected to the core shaft 144a of the valve core 144 and the inner wall of the first accommodating chamber 145 respectively. The first sealing member 147 is used to limit the cooling fluid entering the first accommodating chamber 145 through the fluid inlet 142 from flowing to the fluid outlet 143. When the trigger 131 leaves the first position, for example, when the trigger 131 is in the second position, or when the trigger 131 is between the first position and the second position, there is a gap between the first sealing member 147 and the inner wall of the first accommodating chamber 145. After the cooling fluid enters the first accommodating chamber 145 from the fluid inlet 142, it can continue to flow to the fluid outlet 143 through the gap between the first sealing member 147 and the inner wall of the first accommodating chamber 145.

[0137] like Figure 5 As shown, the first accommodating chamber 145 is formed by a side wall 141a extending substantially in the axial direction, a bottom wall 141b extending in the radial direction, and a connecting wall connecting the side wall 141a and the bottom wall 141b. The opening 140a is formed by the side wall 141a, and the connecting wall is at least partially inclined from the side wall 141a radially toward the axial direction (i.e., the inclined portion 141c), and the connecting wall is located between the fluid inlet 142 and the fluid outlet 143. When the trigger 131 is in the first position, the first sealing member 147 is located between the fluid inlet 142 and the fluid outlet 143, and the first sealing member 147 simultaneously squeezes the inclined portion 141c of the connecting wall and the core shaft 144a, thereby achieving a sealed connection with the valve core 144 and the inner wall of the first accommodating chamber 145, and preventing the cooling fluid from flowing to the fluid outlet 143. When the trigger 131 leaves the first position, the first sealing member 147 leaves the inclined portion 141c of the connecting wall, and the cooling fluid can flow from the fluid inlet 142 to the fluid outlet 143.

[0138] Figures 5 to 7 The first sealing member 147 is exemplarily shown as an O-ring. It is understandable that the first sealing member 147 can also be an elastic sealing structure of other shapes.

[0139] like Figures 5 to 7 As shown, according to some optional embodiments, the flow valve 140 also includes: a second seal 148a and a third seal 148b, wherein the second seal 148a is respectively sealed and connected to the plug body 148 and the inner wall of the first accommodating chamber 145, and the second seal 148a is used to limit the fluid in the first accommodating chamber 145 from flowing out through the opening 140a; the third seal 148b is respectively sealed and connected to the plug body 148 and the core shaft 144a to limit the fluid in the first accommodating chamber 145 from flowing out through the through hole 148c.

[0140] The number of the first seal 147 , the second seal 148 a and the third seal 148 b can be independently set to one, two or more than two, and the specific number is not intended to limit the embodiment of the present disclosure. Figure 6 and Figure 7 The flow valve 140 is exemplarily shown to include a first seal 147 , two second seals 148 a , and a third seal 148 b .

[0141] It can be understood that the second seal 148a and the third seal 148b can not only prevent the fluid in the first accommodating chamber 145 from flowing out, but also prevent external foreign matter from entering the first accommodating chamber 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 sealing member 148a and the third sealing member 148b are both O-rings. It is understood that the second sealing member 148a and the third sealing member 148b can also be elastic sealing structures of other shapes.

[0142] In some optional embodiments, if the plug body 148 itself is elastic, the elasticity of the plug body 148 can also be used to achieve a sealed connection between the plug body 148 and the inner wall of the first accommodating chamber 145, and / or to achieve a sealed connection between the plug body 148 and the valve core 144. At this time, at least one of the second seal 148a and the third seal 148b can be removed.

[0143] It should be noted that the flow valve 140 of the embodiment of the present disclosure is not limited to Figure 5 Only Figure 7 The valve structure shown may also use other electronic valves capable of controlling the fluid flow, wherein the flow regulating switch of the electronic valve is linked to the trigger 131 .

[0144] 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, and 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, and 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.

[0145] like Figure 3bAs shown, when external force acts on the second part 131b of the trigger 131, the trigger 131 rotates counterclockwise 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 tentacle of the positioner 132 to move.

[0146] In an embodiment not shown in the present disclosure, the trigger 131 may not be connected to the valve core 144 through the linkage 133 , and the trigger 131 may be directly connected to the valve core 144 . Alternatively, the trigger 131 may be connected to the positioner 132 through the linkage 133 .

[0147] like Figure 3a and Figure 3b As shown, the linkage member 133 can be a connecting rod mechanism, and the two ends of the connecting rod of the connecting rod mechanism are respectively connected to the first part 131a of the trigger 131 and the valve core 144. In addition, the linkage member 133 can also be a cam structure, a gear structure or a wire pull line or other mechanisms.

[0148] The shaft 111 may be a column integrally formed with the housing 110 , or the shaft 111 may be a shaft-like part independent of the housing 110 , and the shaft-like part is fixed to the housing 110 by means of threaded connection or welding.

[0149] 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 portion 131b to provide elastic force for the trigger 131 to return to the first position. After the external force acting on the trigger 131 is cancelled, the elastic force provided by the second elastic member 102 can automatically reset the trigger 131 to the first position.

[0150] Figure 3a and Figure 3b The second elastic member 102 is exemplarily shown as a spring. In an embodiment not shown in the present disclosure, the second elastic member 102 may also be an elastic structure such as a spring sheet.

[0151] like Figure 2a and Figure 3a As shown, according to some optional embodiments, the interior of the shell 110 has a protrusion 112, the protrusion 112 is 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.

[0152] like Figure 2bAs shown, according to some optional embodiments, the cooling circuit 120 includes: a first circuit 121 and a second circuit 122, the first circuit 121 is connected to the fluid inlet 142, and the first circuit 121 is used to transport the fluid provided by the fluid source to the fluid inlet 142; the second circuit 122 is connected to the fluid outlet 143, and the second circuit 122 is used to transport the cooling fluid flowing through the flow valve 140 to the saw structure 160.

[0153] The first pipeline 121 is used to communicate with an external fluid source, and the second pipeline 122 is used to transport the cooling fluid flowing out of the flow valve 140 to the saw structure 160 .

[0154] Combination Figure 3b According to some optional embodiments, the housing 110 has a second accommodating chamber 113 , and the flow valve 140 , the controller 150 , the positioner 132 and at least a portion of the cooling pipeline 120 are located in the second accommodating chamber 113 .

[0155] It is understandable that after adding the flow valve 140, the valve on the cooling line 120 for controlling the flow of fluid (the valve is the existing valve of the current cutting saw 100, the valve is located outside the second accommodating chamber 113, and is generally a copper ball valve) can be retained or removed. When the copper ball valve is removed, costs can be saved. In the embodiment of the present disclosure, the copper ball valve is used to control whether the external fluid source flows to the first line 121.

[0156] In a specific example, combining Figures 1 to 7The schematic diagram of the structure of the cutting saw shown in the figure shows that in the cutting saw 100, the cooling pipeline 120 is a water pipeline, 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 pipeline 121 and the inlet of the second pipeline 122, and the outlet of the second pipeline 122 faces the saw structure 160. The cutting saw 100 also has a protection button 190, a front handle 170 and a rear handle 180. The trigger 131 can be pressed after the protection button 190 is turned on. 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, one hand can hold the front handle 170 and the other hand can hold the rear handle 180 while gently pressing the trigger 131. The trigger 131 rotates one to three degrees, and the water circuit is connected to tap water (tap water is water with water pressure), but the motor is not turned on. At this time, the valve core 144 of the flow valve 140 is less drawn out, the area of ​​the fluid outlet 143 is less open, and the water circuit is only opened a little, so less water is sprayed to the saw structure 160. When the trigger 131 rotates about five degrees, the switch of the positioner 132 (i.e., the above-mentioned tentacle 132b) is touched and opened, and the motor starts to rotate. At this time, because the trigger 131 is deeply pressed, the valve core 144 of the flow valve 140 is more drawn out, the area of ​​the fluid outlet 143 is more open, the space inside the valve becomes larger, and the water output becomes larger. As the trigger 131 is pressed deeper and deeper, the water output becomes larger and larger, and the positioner 132 gives a signal to the controller 150, the motor speed becomes larger and larger, and thus the cutting saw 100 speed becomes larger and larger. In this example, the total rotation angle of the trigger 131 is 18.8°. When the trigger 131 is released, the motor is powered off first, and then the flow valve 140 is closed, that is, the cooling water is disconnected. By controlling the cooling water output flow rate by changing the pressing depth of the trigger 131, the water output can be controlled more delicately. With an adjustable speed motor, the trigger 131 can be pressed, the motor speed can be increased, and the water spray volume can be increased, thereby improving the intelligence and ease of operation of the cutting saw 100.

[0157] Under the premise of no conflict, different embodiments or different technical features of the present disclosure can be arbitrarily combined to form new embodiments.

[0158] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the utility model that may not be explicitly described. Therefore, the above embodiments only express several implementations of the utility model and do not limit the scope of protection of the utility model patent.

Claims

1. A cutting saw (100), characterized in that: The cutting saw (100) comprises: Housing (110); Saw structure (160); A driving mechanism connected to the housing (110) and providing a driving force for driving the saw structure (160) to rotate; A cooling pipeline (120) for delivering cooling fluid to the saw structure (160); an adjusting component (130) connected to the housing (110), the adjusting component (130) being capable of being displaced relative to the housing (110) under the action of an external force, so as to adjust the fluid flow rate of the cooling fluid flowing out of the cooling pipeline (120); A controller (150), connected to the driving mechanism; The controller (150) is used to control the driving mechanism to rotate in response to the fluid flow being greater than or equal to a first preset amount, wherein the first preset amount is greater than 0.

2. The cutting saw (100) according to claim 1, characterized in that: The relationship between the displacement of the regulating component (130) relative to the housing (110) and the fluid flow rate, and the relationship between the fluid flow rate and the rotation speed of the driving mechanism both satisfy a directly proportional relationship.

3. The cutting saw (100) according to claim 1, characterized in that: The controller (150) is used to control the rotation of the driving mechanism in response to the displacement of the adjustment 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 value of the fluid flow is less than the first preset amount, and the lower limit value of the fluid flow is greater than or equal to 0.

4. The cutting saw (100) according to claim 3, characterized in that: The adjustment component (130) comprises: A trigger (131), wherein the trigger (131) generates the displacement under the action of the external force; a flow valve (140), the flow valve (140) being capable of being linked with the trigger (131) to change the fluid flow rate of the cooling fluid flowing out of the cooling pipeline (120) through the flow valve (140); A positioner (132) capable of being linked with the trigger (131) to generate different adjustment signals as the displacement changes, wherein the controller (150) controls the rotation speed of the drive mechanism according to the adjustment signal.

5. The cutting saw (100) according to claim 4, characterized in that: The flow valve (140) comprises: A valve body (141) having a first accommodating chamber (145), and an opening (140a), a fluid inlet (142), and a fluid outlet (143) respectively connected to the first accommodating chamber (145), wherein the fluid inlet (142) and the fluid outlet (143) are respectively connected to the cooling pipeline (120); A valve core (144) is inserted into the first accommodating cavity (145) from 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 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 completely 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.

6. The cutting saw (100) according to claim 5, 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 (101) 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) maintains linkage with the valve core (144) and contacts the positioner (132) to achieve linkage with the positioner (132).

7. The cutting saw (100) according to claim 5, characterized in that: The valve core (144) comprises: A core shaft (144a) capable of cooperating with the trigger (131); A flow control member (144b) is connected to the core shaft (144a) and moves with the movement of the core shaft (144a); the flow control member (144b) is capable of shielding the fluid outlet (143) during the movement of the core shaft (144a).

8. The cutting saw (100) according to any one of claims 5 to 7, characterized in that: When the trigger (131) switches between the first position and the second position, the moving direction of the valve core (144) is perpendicular to the axis of the fluid outlet (143).

9. The cutting saw (100) according to any one of claims 5 to 7, characterized in that: The distance that the valve core (144) moves from the first position to the second position satisfies a linear positive correlation with the fluid flow rate.

10. The cutting saw (100) according to claim 7, characterized in that The flow valve (140) further includes: The first elastic member (146) is located in the first accommodating chamber (145), and the first elastic member (146) provides an elastic force for the valve core (144) to move in the direction of the fluid outlet (143).

11. The cutting saw (100) according to claim 10, characterized in that The flow valve (140) further includes: A plug body (148) is inserted into the first accommodating cavity (145) from the opening (140a), the plug body (148) having a through hole (148c) for the valve core (144) to pass through; A first gasket (149a), connected to the plug body (148); The second gasket (149b) is connected to the flow control member (144b), and the two ends of the first elastic member (146) are respectively connected to the first gasket (149a) and the second gasket (149b).

12. The cutting saw (100) according to claim 5, characterized in that The flow valve (140) further includes: A first sealing member (147), when the trigger (131) is in the first position, the first sealing member (147) is sealedly connected to the valve core (144) and the inner wall of the first accommodating chamber (145), respectively, and the first sealing member (147) is used to limit the cooling fluid entering the first accommodating chamber (145) through the fluid inlet (142) from flowing to the fluid outlet (143).

13. The cutting saw (100) according to claim 11, characterized in that The flow valve (140) further includes: a second sealing member (148a) which is sealingly connected to the plug body (148) and the inner wall of the first accommodating chamber (145), respectively, and the second sealing member (148a) is used to limit the fluid in the first accommodating chamber (145) from flowing out through the opening (140a); and / or, A third sealing member (148b) is sealingly connected to the plug body (148) and the core shaft (144a) respectively, so as to limit the fluid in the first accommodating chamber (145) from flowing out through the through hole (148c).

14. The cutting saw (100) according to claim 5 or 6, characterized in that: The housing (110) has a protruding shaft (111); the trigger (131) is connected to the shaft (111) and is capable of rotating 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), or the first end of the trigger (131) is connected to the valve core (144) via a linkage member (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 respectively located on two sides of the shaft (111).

15. The cutting saw (100) according to claim 14, characterized in that The second part (131b) of the trigger (131) can be linked with the positioner (132).

16. The cutting saw (100) according to claim 14, characterized in that The cutting saw (100) further comprises: The second elastic member (102) has two ends respectively connected to the housing (110) and the second portion (131b) to provide elastic force for the trigger (131) to return to the first position.

17. The cutting saw (100) according to claim 5, characterized in that The housing (110) has a protruding portion (112) inside, and the protruding portion (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 further displacement.

18. The cutting saw (100) according to claim 5, characterized in that The cooling pipeline (120) comprises: A first pipeline (121), connected to the fluid inlet (142), the first pipeline (121) being used to transport fluid provided by a fluid source to the fluid inlet (142); A second pipeline (122) is connected to the fluid outlet (143), and the second pipeline (122) is used to transport the cooling fluid flowing through the flow valve (140) to the saw structure (160).

19. The cutting saw (100) according to claim 4, characterized in that The housing (110) has a second accommodating chamber (113), and the flow valve (140), the controller (150), the positioner (132), and at least a portion of the cooling pipeline (120) are located in the second accommodating chamber (113).

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