Cutting machine

Abstract

The utility model discloses a cutting machine. The cutting machine comprises: a housing; the motor is provided with a motor shaft; the output shaft is used for mounting and driving the saw blade; the transmission assembly transmits power between the motor shaft and the output shaft; the cutting machine is stably hung on one or more fulcrums through the hook assembly in a posture that the whole machine is basically vertical; according to the scheme, storage, hanging, draining and the like of the cutting machine can be achieved easily.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, for example to a cutting machine. BACKGROUND

[0002] A cutting machine (also known as cut-off saw, cut-off machine, in English: Cut-off Saw) in the related art can be used for cutting concrete and the like, can be handheld, and usually adopts a forced air cooling scheme. The forced air cooling scheme drives a fan to rotate by a motor, so that air flows through a circuit board, a motor and other heat generating components inside a machine housing, and then is discharged from the machine housing. In the case of a large load, the existing forced air cooling scheme cannot meet the heat dissipation requirement.

[0003] This section provides background information relating to the present application, which is not necessarily prior art. SUMMARY

[0004] It is an object of the present application to solve or at least alleviate some or all of the above problems. To this end, the present application provides a cutting machine.

[0005] A cutting machine comprises: a machine housing; a motor having a motor shaft; an output shaft for mounting and driving a saw blade; a transmission assembly for power transmission between the motor shaft and the output shaft; a circuit board assembly comprising a circuit board and a heat sink, the circuit board being connected to the heat sink; a heat conduction member connected to the machine housing, the heat conduction member being at least partially located outside the machine housing; the machine housing has an opening, and the heat sink is at least partially exposed to the machine housing through the opening and in thermal contact with the heat conduction member.

[0006] In some embodiments, the heat sink is a heat dissipation box, and the heat dissipation box has a plurality of heat dissipation through holes on the side away from the circuit board, the heat dissipation through holes penetrating the box body of the heat dissipation box in a direction substantially parallel to the plane in which the circuit board is located.

[0007] In some embodiments, the opening is located at the bottom of the front of the machine housing, the heat conduction member is connected to the machine housing around the opening and has a heat conduction plane covering the opening, and the heat sink is attached to the heat conduction member through the heat conduction plane.

[0008] In some embodiments, the cutting machine further comprises a liquid cooling system, which sprays cooling liquid to the saw blade when the saw blade is cutting, and the movement path of the cooling liquid after leaving the saw blade passes through the heat conduction member.

[0009] In some embodiments, the liquid cooling system comprises a transmission pipe for transmitting the cooling liquid, and a slot is formed in the machine housing for the transmission pipe to pass through, and the extension path of the transmission pipe passes through the machine housing around the circuit board assembly.

[0010] In some embodiments, the projection of the transmission pipe and the circuit board in the up-down direction at least partially overlaps; and / or, the projection of the transmission pipe and the heat sink in the up-down direction at least partially overlaps.

[0011] In some embodiments, the cutting machine further comprises a sealing member arranged around the opening and filling the gap between the housing, the heat sink and the heat conducting member.

[0012] In some embodiments, the cutting machine further comprises a fan mounted on the motor shaft, the housing has an air inlet and an air outlet, and the heat dissipation airflow enters the housing from the air inlet, sequentially flows through the circuit board assembly and the motor, and is blown out from the air outlet.

[0013] In some embodiments, the air inlet is located on the left wall and / or the right wall of the middle and rear part of the housing, and the air outlet is located on the front part of the housing.

[0014] In some embodiments, the heat conducting member is a wear-resistant metal member.

[0015] A cutting machine comprises a housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, and a transmission assembly for power transmission between the motor shaft and the output shaft. The cutting machine further comprises a circuit board assembly comprising a circuit board and a heat sink, the circuit board being connected to the heat sink, and the housing having an opening through which the heat sink is at least partially exposed to the housing.

[0016] In some embodiments, the housing comprises a main body part extending in the front-rear direction, the main body part having a support surface for supporting the cutting machine when the cutting machine is placed horizontally, and the motor shaft extends along a motor shaft line which is obliquely intersected with the support surface.

[0017] In some embodiments, the output shaft is located outside the housing, and the output shaft extends substantially parallel to the support surface and in the left-right direction of the housing.

[0018] In some embodiments, the cutting machine further comprises a second housing connected to the housing and located outside the housing, and the transmission assembly is at least partially located in the second housing; the central axis of the second housing is obliquely intersected with the support surface.

[0019] In some embodiments, the transmission assembly comprises a long shaft connected to and collinear with the motor shaft, and a bevel gear set connected between the long shaft and the output shaft and performing power transmission.

[0020] In some embodiments, the cutting machine further comprises a shaft lock assembly arranged on the second housing, the shaft lock assembly comprising an operating member and a shaft lock member connected to each other; the long shaft is provided with a shaft lock groove along the circumferential direction, the shaft lock groove extending in a direction substantially parallel to the long shaft; the operating member is operated by a user to push the operating member and the shaft lock member in a direction substantially parallel to the long shaft, so that the shaft lock member is embedded in the shaft lock groove to lock the rotation of the output shaft.

[0021] In some embodiments, the cutting machine further comprises a heat-conducting member, the heat-conducting member, the heat-dissipating member and the second housing are connected; the heat-dissipating member, the heat-conducting member, the second housing and the saw blade are made of electrically conductive material, and static electricity generated during cutting is released to the ground through the heat-dissipating member, the heat-conducting member, the second housing and the saw blade.

[0022] In some embodiments, the cutting machine further comprises a shroud and a shroud adjusting mechanism, the shroud is connected to the second housing through the shroud adjusting mechanism, the shroud adjusting mechanism comprises an adjusting bolt and an adjusting handle; the side of the shroud close to the second housing is provided with a rotating track, one end of the adjusting bolt is fixedly connected to the second housing, and the other end is rotatably connected to the shroud through the rotating track, and the adjusting handle releases or locks the relative rotation between the adjusting bolt and the shroud, thereby locking or releasing the relative rotation between the second housing and the shroud.

[0023] In some embodiments, the shroud adjusting mechanism steplessly adjusts the rotation angle of the shroud around the output shaft, and the rotation angle of the shroud around the output shaft is 0-45°.

[0024] In some embodiments, the circuit board is located below the motor, and the projection of the circuit board and the motor in the up-down direction at least partially overlaps.

[0025] A cutting machine comprises a housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, and a transmission assembly for power transmission between the motor shaft and the output shaft. The cutting machine further comprises a circuit board assembly comprising a circuit board and a heat-dissipating box, the circuit board being connected to the heat-dissipating box. The heat-dissipating box has a plurality of heat-dissipating through holes on the side away from the circuit board, the heat-dissipating through holes penetrating the box body of the heat-dissipating box in a direction substantially parallel to the plane where the circuit board is located. A baffle is connected to the housing and located in the housing. The housing has an air inlet, and the housing, the baffle and the heat-dissipating box form a first airflow channel between the air inlet and the heat-dissipating through holes. The heat-dissipating airflow enters the housing from the air inlet and then passes through the first airflow channel and the heat-dissipating through holes in sequence.

[0026] In some embodiments, the housing has an air outlet, the motor has a motor housing, the housing and the motor housing form a second airflow channel between the motor and the air outlet, and the heat-dissipating airflow passes through the second airflow channel from the air outlet after flowing through the motor in the motor housing.

[0027] In some embodiments, the first airflow channel is substantially sealed between the air inlet and the heat-dissipating through holes, and / or the second airflow channel is substantially sealed between the motor and the air outlet.

[0028] In some embodiments, the heat-dissipating box is located below the motor, and the projection of the heat-dissipating box and the motor in the up-down direction at least partially overlaps, and the heat-dissipating airflow passes through the inner cavity of the housing into the motor housing after passing through the heat-dissipating through holes.

[0029] In some embodiments, the cutting machine further comprises a shroud and a liquid cooling system, the saw blade portion is accommodated in the shroud, and the liquid cooling system sprays cooling liquid to the saw blade when the saw blade performs cutting; the liquid cooling system comprises a nozzle, and the nozzle penetrates through the shroud to output the cooling liquid.

[0030] In some embodiments, the liquid cooling system comprises a left nozzle and a right nozzle, the left nozzle is arranged at a left end face of the shroud, and the right nozzle is arranged at a right end face of the shroud.

[0031] In some embodiments, the liquid cooling system further comprises an inlet valve and a transmission pipe, the transmission pipe is used for transmitting the cooling liquid, and the inlet valve adjusts the flow rate of the cooling liquid in the transmission pipe.

[0032] In some embodiments, the left nozzle and / or the right nozzle comprises a first piece and a second piece, the first piece is connected with the shroud and has a through hole penetrating through the shroud, and the second piece is detachably connected with the first piece; in a state where the second piece is mounted to the first piece, an end of the through hole away from the shroud is closed by the second piece; in a state where the second piece is detached from the first piece, the end of the through hole away from the shroud is open.

[0033] In some embodiments, the cutting machine further comprises a second housing, the second housing is located outside the main housing, and the transmission assembly is at least partially accommodated in the second housing; the liquid cooling system further comprises a transmission pipe used for transmitting the cooling liquid, the transmission pipe penetrates through between the second housing and the shroud from the front end of the main housing, straddles above the shroud, and is connected with the left nozzle and the right nozzle.

[0034] In some embodiments, the shroud upper portion is provided with a shroud handle for a user to operate to rotate the shroud, and the transmission pipe is limited by the shroud handle when straddling above the shroud.

[0035] In some embodiments, the cutting machine further comprises a support guide, the support guide has a support portion located between the second housing and the shroud, and the transmission pipe penetrates through the support portion and is limited by the support portion.

[0036] A cutting machine comprises a main housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, and a transmission assembly for power transmission between the motor shaft and the output shaft. The cutting machine further comprises a battery pack for at least powering the motor. The main housing comprises a main body portion and a battery compartment cover, the main body portion has a battery compartment formed inside, and the battery compartment cover has a closed state and an open state. In the closed state, the battery compartment cover seals the battery compartment. In the open state, the battery pack is detachably plugged into the battery compartment in the left-right direction.

[0037] In some embodiments, the battery compartment cover is rotationally connected with the main body portion, and the battery compartment cover can rotate around a flip axis, and the flip axis is perpendicular to the bottom surface of the main housing.

[0038] In some embodiments, in the open state, the battery compartment cover is freely rotatable around the flip axis between 0 and 180° compared with the closed state.

[0039] In some embodiments, the battery compartment cover is pivoted about the flip axis to a preset angle greater than or equal to 90° and less than or equal to 180° from the closed state and is kept at the preset angle in the open state.

[0040] In some embodiments, one of the main body and the battery compartment cover is provided with a second buckle, and the other is provided with a second slot, the second buckle and the second slot are matched to realize the sealing of the battery compartment; the battery compartment cover is rotatably connected with the main body through a connecting shaft, the connecting shaft extends along the flip axis, the connecting shaft is connected with the elastic member, and when the second buckle is disengaged from the second slot, the elastic member makes the battery compartment cover pivot about the flip axis to a preset angle from the closed state and keeps at the preset angle.

[0041] In some embodiments, one of the battery pack and the battery compartment is provided with a first buckle, and the other is provided with a first slot, the first buckle and the first slot are matched to realize the locking of the battery pack and the battery compartment; the cutting machine further comprises a battery pack ejection mechanism arranged on the inner wall of the battery compartment, which at least partially ejects the battery pack out of the battery compartment along the insertion and extraction direction when the first buckle is disengaged from the first slot.

[0042] In some embodiments, the inner wall of the battery compartment is provided with a circuit wiring and a terminal seat; the cutting machine further comprises a wiring cover plate arranged in the battery compartment, the wiring cover plate is matched with the inner wall of the battery compartment to limit the circuit wiring.

[0043] In some embodiments, the terminal seat is arranged on the upper inner wall of the battery compartment; the circuit wiring and the wiring cover plate are arranged on the left inner wall or the right inner wall of the battery compartment away from the battery compartment cover.

[0044] A cutting machine comprises: a machine housing; a motor having a motor shaft; an output shaft for mounting and driving a saw blade; a transmission assembly for power transmission between the motor shaft and the output shaft; a battery pack for at least powering the motor, the housing of the battery pack being provided with a prompt element for displaying state information of the battery pack; the machine housing is internally formed with a battery compartment, and the battery pack is detachably inserted and extracted in the battery compartment; the machine housing has a transparent part corresponding to the position of the prompt element, and the state information displayed by the prompt element can be observed through the transparent part.

[0045] In some embodiments, the prompt element displays at least the remaining power information of the battery pack.

[0046] In some embodiments, the prompt element is a remaining power indicator light of the battery pack.

[0047] In some embodiments, the shell comprises a main body part, a holding part located at least partially at the back of the main body part, and a battery compartment cover for sealing the battery compartment; a transparent part is located on the upper back side of the main body part and in front of the holding part; and / or, the transparent part is located on the battery compartment cover.

[0048] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0049] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0050] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0051] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0052] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0053] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0054] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0055] In some embodiments, the shell is provided with a first operation member for a user to operate to make the prompt member display state information.

[0056] A cutting machine comprises a shell, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, a transmission assembly for power transmission between the motor shaft and the output shaft, and a battery pack for at least powering the motor; the shell is provided with a battery prompt member electrically connected to a circuit board to obtain and display state information of the battery pack.

[0057] A cutting machine comprises a housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, a transmission assembly for power transmission between the motor shaft and the output shaft, a second housing located outside the housing and accommodating at least part of the transmission assembly, a through hole is formed in the second housing for the flow of air and / or lubricant, and the cutting machine further comprises an expansion cover covering the through hole and being sealingly connected with the second housing to form a variable-volume sealed space between the expansion cover and the second housing, which is only open to the through hole.

[0058] In some embodiments, the expansion cover is made of soft rubber material, which includes rubber or silicone.

[0059] In some embodiments, the second housing comprises a second housing body and a first end cover, the first end cover is sealingly connected with the second housing body to form a first accommodation space accommodating at least the transmission assembly, a through hole is formed in the first end cover, and the expansion cover is mounted to the first end cover.

[0060] In some embodiments, the second housing further comprises a second end cover mounted to the first end cover, and the expansion cover is clamped between the first end cover and the second end cover.

[0061] In some embodiments, the second end cover and the first end cover form a second accommodation space accommodating at least the bearing assembly therebetween.

[0062] In some embodiments, the first end cover and the second end cover have facing abutting portions, and the expansion cover is clamped and fixed between the abutting portions.

[0063] In some embodiments, the abutting portions separate the space of the bearing assembly in the second accommodation space from the space of the expansion cover.

[0064] In some embodiments, the second end cover has an opening communicating with the outside, and the expansion cover divides the second accommodation space between the second end cover and the first end cover into a sealed space communicating with the first accommodation space through the through hole in the first end cover and an open space communicating with the outside through the opening in the second end cover.

[0065] In some embodiments, when the temperature and / or pressure in the first accommodation space between the first end cover and the second housing body where the transmission assembly is located increases, the gas and / or lubricant in the first accommodation space enters between the expansion cover and the first end cover through the through hole.

[0066] In some embodiments, one end of the output shaft is connected with the transmission assembly in the first accommodation space, and the other end of the output shaft penetrates through the first end cover, the second end cover, and then penetrates into the guard cover to mount and drive the saw blade.

[0067] A cutting machine comprises a housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, a transmission assembly for power transmission between the motor shaft and the output shaft, and a hook assembly by which the cutting machine is stably hung in a substantially vertical posture at a fulcrum.

[0068] In some embodiments, the hook assembly is arranged at the bottom surface of the housing.

[0069] In some embodiments, the hook assembly is arranged at a higher portion of the bottom surface of the housing in the vertical direction.

[0070] In some embodiments, the housing comprises a main body extending in the front-rear direction, and a battery compartment is formed inside the main body, and the hook assembly is arranged at the bottom surface of the housing below the battery compartment.

[0071] In some embodiments, the housing comprises a main handle at the rear of the cutting machine, and the hook assembly is arranged at the bottom surface or the rear end of the main handle.

[0072] In some embodiments, the hook assembly has a storage state and a hanging state, and the hook assembly is rotationally connected to the housing, and the hook assembly is rotated relative to the housing to switch between the storage state and the hanging state.

[0073] In some embodiments, the hook assembly comprises a hook body and a mounting member, and the mounting member is fixedly connected to the housing, and the hook body is rotationally connected to the mounting member.

[0074] In some embodiments, the hook body is rotated by at least 90° relative to the mounting member in the hanging state than in the storage state.

[0075] In some embodiments, the bottom surface of the housing of the cutting machine is substantially perpendicular to the ground in the hanging state, and the surface on which the hook body is located is substantially parallel to the bottom surface of the housing, wherein the bottom surface of the housing is substantially parallel to the ground when the cutting machine is placed horizontally.

[0076] In some embodiments, the surface on which the hook body is located is substantially perpendicular to the bottom surface of the housing in the hanging state.

[0077] A cutting machine comprises a housing, a motor having a motor shaft, an output shaft for mounting and driving a saw blade, a transmission assembly for power transmission between the motor shaft and the output shaft, and a hook assembly by which the cutting machine is stably hung in a substantially vertical posture at a fulcrum.

[0078] In some embodiments, the shaft locking assembly further comprises an operating member connected to or formed on the shaft locking member, having a locking position and an unlocking position switchable in a rotating manner.

[0079] In some embodiments, the rotating axis of the operating member is collinear or parallel to the rotating axis of the shaft locking member.

[0080] In some embodiments, the support limiting member has a helical track arranged circumferentially on the shaft locking member, and the shaft locking member is connected to or formed with a cooperating part which moves along the helical track under the constraint of the track to drive the shaft locking member to rotate upward or downward.

[0081] In some embodiments, the helical track of the support limiting member is at least partially accommodated in the operating member.

[0082] In some embodiments, the two ends of the helical track are provided with locking parts, and the cooperating part is limited by the locking parts when reaching the two ends of the helical track to keep the shaft locking assembly in the locked state or the unlocked state.

[0083] In some embodiments, during the process of switching from one of the locking position and the unlocking position to the other of the locking position and the unlocking position, the cooperating part overcomes the limitation of the locking part at one end of the helical track, is driven by or overcomes the driving of the elastic member to rotate upward or downward along the helical track, until reaching the locking part at the other end of the helical track and being limited and parked by the locking part to drive the shaft locking member to disengage or engage the shaft locking groove.

[0084] In some embodiments, the cutting machine further comprises a second housing located outside the housing and accommodating at least part of the transmission assembly, and the support limiting member is fixedly installed on the second housing.

[0085] In some embodiments, the transmission assembly comprises a long shaft connected to the shaft of the motor, and the shaft locking grooves are arranged circumferentially along the long shaft.

[0086] In some embodiments, a guide surface is arranged between adjacent shaft locking grooves, and the shaft locking member will slide along the guide surface opposite to the shaft locking groove after rotating upward or downward to the guide surface to engage the shaft locking groove.

[0087] The application has at least the advantage of facilitating the realization of the functions of the cutting machine, such as storage and hanging drainage. BRIEF DESCRIPTION OF DRAWINGS

[0088] Figure 1 is a perspective view of the cutting machine provided by the application from one angle;

[0089] Figure 2 is a perspective view of the cutting machine provided by the application from another angle;

[0090] Figure 3 is Figure 2An exploded view of the heat-conducting and heat-dissipating components in the cutting machine shown.

[0091] Figure 4 This is an exploded view of the cutting machine provided in this application;

[0092] Figure 5 This is a perspective view of the motor, transmission assembly, output shaft, and shaft lock assembly in the cutting machine provided in this application;

[0093] Figure 6 yes Figure 5 The diagram shows the cutting machine's spindle lock assembly in the unlocked state.

[0094] Figure 7 yes Figure 5 The diagram shows the cutting machine's spindle lock assembly in the locked state.

[0095] Figure 8 This is a left view of the cutting machine provided in this application;

[0096] Figure 9 This is a perspective view of the cutting machine provided in this application after part of the machine casing has been removed;

[0097] Figure 10 This is a perspective view of the cutting machine provided in this application after part of the machine casing has been removed, viewed from another angle.

[0098] Figure 11 This is a schematic diagram of the heat dissipation airflow direction in the cutting machine provided in this application. Figure 1 ;

[0099] Figure 12 This is a schematic diagram of the heat dissipation airflow direction in the cutting machine provided in this application. Figure 2 ;

[0100] Figure 13 yes Figure 12 An exploded perspective view of part of the casing, air guide plate, and heat dissipation components of the cutting machine shown.

[0101] Figure 14 This is a schematic diagram of the heat dissipation airflow direction in the cutting machine provided in this application. Figure 3 ;

[0102] Figure 15 This is a right view of the cutting machine provided in this application after part of the machine casing has been removed;

[0103] Figure 16 yes Figure 15 The cutting machine shown is a cross-sectional view along the AA direction;

[0104] Figure 17 This is a perspective view of the motor, second housing, protective cover, and protective cover adjustment mechanism in the cutting machine provided in this application;

[0105] Figure 18 is Figure 17 is an exploded view of a shroud and shroud adjustment mechanism in the cutting machine shown in FIG. 1;

[0106] Figure 19 is an exploded view of a left nozzle in the cutting machine provided by the present application;

[0107] Figure 20 is an exploded view of a left nozzle in the cutting machine provided by the present application;

[0108] Figure 21 is a plan view of the shroud in the cutting machine provided by the present application in a first position;

[0109] Figure 22 is a plan view of the shroud in the cutting machine provided by the present application in a second position;

[0110] Figure 23 is a perspective view of a battery compartment, a battery compartment cover, and a battery pack in the cutting machine provided by the present application;

[0111] Figure 24 is Figure 23 is a perspective view of an exploded structure of a battery compartment and a battery compartment cover in the cutting machine shown in FIG. 1;

[0112] Figure 25 is Figure 23 is an exploded view of a part of a structure in the battery compartment in the cutting machine shown in FIG. 1;

[0113] Figure 26 is a perspective view of the cutting machine from another viewing angle provided by the present application;

[0114] Figure 27 is Figure 26 is a perspective view of a battery prompter and a circuit board assembly in the cutting machine shown in FIG. 1 after removal of part of a machine housing;

[0115] Figure 28 is Figure 27 is a perspective view of an exploded structure of a battery prompter shown in FIG. 1;

[0116] Figure 29 is Figure 26 is a perspective view of a transmission pipe and an elastic support in the cutting machine shown in FIG. 1;

[0117] Figure 30 is Figure 26 is a perspective view of an exploded structure of a left nozzle, a shroud, and a right nozzle in the cutting machine shown in FIG. 1;

[0118] Figure 31 is Figure 26Exploded view of the second housing body, first end cover, expansion cover, second end cover, and shroud of the cutting machine shown in FIG. 1;

[0119] Figure 32 is Figure 26 Cross-sectional view of the shroud, output shaft, bearing assembly, and second housing of the cutting machine shown in FIG. 1;

[0120] Figure 33 is Figure 26 Plan view of the hook assembly in the stowed state of the cutting machine shown in FIG. 1;

[0121] Figure 34 is Figure 26 Plan view of the hook assembly in the hung state of the cutting machine shown in FIG. 1;

[0122] Figure 35 is Figure 26 Perspective view of the shaft lock assembly in the locked state of the cutting machine shown in FIG. 1 with portions of the housing removed;

[0123] Figure 36 is Figure 26 Perspective view of the shaft lock assembly in the unlocked state of the cutting machine shown in FIG. 1 with portions of the housing removed;

[0124] Figure 37 is Figure 35 Exploded view of the shaft lock assembly shown in FIG. 1;

[0125] Figure 38 is Figure 35 Cross-sectional view of the shaft lock assembly shown in FIG. 1.

[0126] BRIEF DESCRIPTION OF THE DRAWINGS

[0127] 100, cutting machine;

[0128] 110, housing; 111, main body portion; 1111, battery compartment; 1112, second clasp; 112, main handle; 113, front handle; 114, air inlet; 115, air outlet; 116, battery compartment cover; 1161, second clamping groove; 117, connecting shaft; 118, elastic member; 119, transparent portion; 1191, battery prompt member; 1192, operation portion; 1193, sub-circuit board; 1194, prompt portion;

[0129] 120, motor; 121, motor shaft; 122, motor shaft axis; 123, motor housing; 130, output shaft; 131, output shaft axis; 140, transmission assembly; 141, long shaft; 1411, shaft lock groove; 1412, guide surface; 142, bevel gear set; 1421, first bevel gear; 1422, second bevel gear; 143, bearing assembly;

[0130] 150, saw blade; 160, second housing; 161, second housing main body; 162, first end cover; 163, second end cover; 164, expansion cover; 165, through hole; 166, butt joint part; 167, opening; 170, shaft lock assembly; 171, operating piece; 172, shaft lock piece; 1721, matching part; 173, support limiting piece; 1731, spiral track; 1732, locking part; 174, elastic piece;

[0131] 180, circuit board assembly; 181, circuit board; 182, heat dissipation piece; 1821, heat dissipation through hole; 183, sealing piece; 190, heat conduction piece;

[0132] 210, liquid cooling system; 211, transmission pipe; 2112, elastic support piece; 212, left nozzle; 2121, first piece; 2122, second piece; 213, right nozzle; 214, liquid inlet valve;

[0133] 220, shield; 221, rotating track; 230, shield handle; 240, support guide piece; 241, support part; 242, guide part; 250, water baffle; 260, fan; 270, air deflector; 280, shield adjusting mechanism; 281, adjusting bolt; 282, adjusting handle; 283, elastic gasket;

[0134] 290, battery pack; 291, first buckle; 292, prompting piece; 293, second operating piece; 294, third operating piece; 310, battery pack ejection mechanism; 320, terminal seat; 330, line cover plate; 340, first operating piece; 410, hook assembly; 411, hook main body; 412, mounting piece. DETAILED DESCRIPTION

[0135] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0136] In this application, the terms "comprise", "comprising", "have", "having", "include", "including", "contain", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise, have, include, contain or the like a list of elements are not limited to those elements, but can also include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0137] In the present application, the term "and / or", is a description of an associated relationship with associated objects, which means that there can be three kinds of relationships. For example, A and / or B, can represent: the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0138] In the present application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components with at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0139] In the present application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain number of degrees (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0140] In the present application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0141] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, it is also necessary to understand in the context that when referring to an element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below, etc.

[0142] In the present application, the terms "controller", "processor", "central processing unit", "CPU", "MCU" can be interchangeable. When using the unit "controller", "processor", "central processing unit", "CPU" or "MCU" to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0143] In the present application, the terms "device", "module" or "unit" can be realized by hardware or software to achieve a specific function.

[0144] In the present application, the terms "calculate", "judge", "control", "determine", "identify" and the like refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0145] Referring to Figures 1 to 10 The present application provides a cutting machine 100, which comprises a housing 110, a motor 120, an output shaft 130 and a transmission assembly 140. The housing 110 comprises a main body 111 extending in the front-back direction, the motor 120 is arranged in the main body 111, the motor 120 has a motor shaft 121, the output shaft 130 is used to install and drive a saw blade 150, and the transmission assembly 140 transmits power between the motor shaft 121 and the output shaft 130.

[0146] The housing 110 further comprises a holding portion, which is at least partially located behind the main body 111. The holding portion comprises a main handle 112, which is located behind the main body 111 and is convenient for holding. In some embodiments, the main handle 112 constitutes a through hole through which a hand can pass to hold. The holding portion further comprises a front handle 113, which is arranged on the main body 111 and located above the main body 111. When in use, one hand can hold the front handle 113 and the other hand can hold the main handle 112, which is convenient for operating the cutting machine 100.

[0147] In some embodiments, the housing 110 includes a left housing and a right housing, which are coupled to form the main body portion 111 and the grip portion. In some embodiments, the main body portion 111 is detachably connected with the grip portion, and the main body portion 111 includes a left housing and a right housing. Of course, the housings 110 can also be integrally formed.

[0148] The main body portion 111 has a support surface for supporting the cutting machine 100 when the cutting machine 100 is horizontally placed, so that the cutting machine 100 is more stable when placed horizontally. The motor shaft 121 extends along a motor shaft line 122, which is obliquely intersected with the support surface. The motor shaft line 122 is adapted to the output mechanism such as the transmission assembly 140 to be described later, and can effectively reduce the length of the whole machine. In some embodiments, the angle between the motor shaft line 122 and the support surface is 15° to 60°.

[0149] The output shaft 130 is located outside the housing 110, and extends parallel to the support surface and along the left-right direction of the housing 110. The output shaft 130 extends along an output shaft line 131, which is parallel to the support surface. The output shaft line 131 can intersect the motor shaft line 122. In some embodiments, the motor shaft 121 is substantially perpendicular to the output shaft 130, i.e., the motor shaft line 122 is perpendicular to the output shaft line 131. In some embodiments, the motor shaft line 122 and the output shaft line 131 are arranged at an angle.

[0150] The transmission assembly 140 includes a long shaft 141 connected with and collinear with the motor shaft 121, and a bevel gear set 142 connected between the long shaft 141 and the output shaft 130 and performing power transmission. The motor 120 drives the long shaft 141 to rotate, and then transmits power to the output shaft 130 through the bevel gear set 142.

[0151] The bevel gear set 142 includes a first bevel gear 1421 arranged on the long shaft 141 and a second bevel gear 1422 arranged on the output shaft 130, and the first bevel gear 1421 is engaged with the second bevel gear 1422. In some embodiments, the first bevel gear 1421 is integrally formed with the long shaft 141.

[0152] The cutting machine 100 further comprises a second housing 160, which is connected to the housing 110 and at least partially located outside the housing 110. The second housing 160 can be located between the housing 110 and the output shaft 130 and the saw blade 150. The transmission assembly 140 is at least partially located in the second housing 160. In some embodiments, the second housing 160 containing the transmission assembly 140 constitutes a gear box and bearing chamber. By providing the second housing 160, the assembly is facilitated, and the replacement and maintenance are facilitated. The central axis of the second housing 160 is obliquely intersected with the support surface. The second housing 160 extends along the central axis, and the central axis is parallel to the axis of the long shaft 141. In some embodiments, the central axis coincides with the axis of the long shaft 141.

[0153] The second housing 160 containing the transmission assembly 140 or the gear box is filled with semi-solid grease or the like for lubrication, and is generally a sealed space. However, under the influence of working conditions, such as high-power work or high ambient temperature, the temperature and pressure in the cavity will increase, and the lubricant is prone to leakage at weak sealing positions. In order to improve the above problems, in some embodiments, the second housing 160 is provided with a through hole 165 for the flow of gas and / or lubricant, and the second housing 160 is further provided with an expansion cover 164 covering the through hole 165. The expansion cover 164 is sealingly connected with the second housing 160, and the expansion cover 164 can be elastically deformed to form a closed space with variable volume and no gas and oil leakage outside the through hole 165 of the second housing 160. Therefore, in the case of temperature and / or pressure increase, the gas and / or lubricant in the second housing 160 or the gear box can enter the closed space with variable volume formed by the expansion cover 164 and the second housing 160 through the through hole 165. The cavity pressure and the external atmospheric pressure are balanced, and the lubricant is not prone to leakage, so as to ensure that the cutting machine 100 always works smoothly. In some embodiments, the expansion cover 164 can be made of soft rubber, silicone or other soft and elastic materials that do not leak gas and oil.

[0154] In some embodiments, with reference to Figure 31 、 Figure 32The second casing 160 includes a second casing body 161, a first end cover 162, and a second end cover 163. The first end cover 162 is mounted to the second casing body 161 in a sealed connection, and a first accommodating space is formed therebetween, i.e., a gear box inner cavity accommodating the gear train 140, and the long shaft 141 and bevel gear set 142 can be arranged therein. The through hole 165 can be formed in the first end cover 162, and the expansion cover 164 covers the through hole 165 and is sealed to the first end cover 162. The second end cover 163 is mounted to the first end cover 162 and a second accommodating space is formed therebetween. In some embodiments, the second accommodating space at least accommodates a bearing assembly for supporting the output shaft 130, i.e., a bearing chamber inner cavity accommodating the bearing assembly of the output shaft 130.

[0155] The first and second end covers 162, 163 are located between the second casing body 161 and the shroud 220, and the second end cover 163 is closer to the shroud 220. The first and second end covers 162, 163 are provided with through holes through which the output shaft 130 passes. Understandably, they are different from the through hole 165 for airflow and / or lubricant flow. The output shaft 130 is connected to the second bevel gear 1422 in the gear box inner cavity, and sequentially passes through the gear box inner cavity and the bearing chamber inner cavity through the through holes in the first and second end covers 162, 163, and then passes into the shroud 220 to install and drive the saw blade 150.

[0156] The expansion cover 164 can be arranged in the second accommodating space formed between the first end cover 162 and the second end cover 163. In some embodiments, as shown in Figure 32 The first and second end covers 162, 163 have abutting portions 166 facing each other for clamping and fixing the expansion cover 164. When the second end cover 163 is mounted to the first end cover 162, the abutting portions 166 of the first and second end covers 162, 163 clamp the expansion cover 164 therebetween. Further, the abutting portions 166 divide the second accommodating space formed between the first and second end covers 162, 163 into a space accommodating the bearing assembly which does not communicate with the outside or the gear box, and a space accommodating the expansion cover 164 which communicates with the outside and the gear box. The space where the expansion cover 164 is located is divided by the expansion cover 164 into one side which forms a sealed space communicating with the gear box and opening to the through hole 165 on the first end cover 162 for airflow and oil flow, and the other side which forms an open space communicating with the outside and the opening 167 on the second end cover 163.

[0157] Referring to Figures 4 to 7The cutting machine 100 further comprises a shaft locking assembly 170 arranged on the second casing 160, the shaft locking assembly 170 comprising an operating member 171 and a shaft locking member 172 connected to each other; the long shaft 141 is provided with a shaft locking groove 1411 along a circumferential direction, the shaft locking groove 1411 extends along a direction parallel to the long shaft 141, and in some embodiments, the shaft locking groove 1411 is arranged on a component sleeved on the long shaft 141; the operating member 171 is operated by a user to push the operating member 171 and the shaft locking member 172 along a direction parallel to the long shaft 141, so that the shaft locking member 172 is embedded in the shaft locking groove 1411, and then the rotation of the output shaft 130 is locked.

[0158] The shaft locking assembly 170 has an unlocked state and a locked state, in the locked state, the output shaft 130 can be locked by the shaft locking assembly 170, so that the transmission assembly 140 does not rotate with the saw blade, thereby facilitating the assembly and disassembly of the saw blade, and preventing the saw blade 150 from rotating by mistake in a non-use condition, thereby ensuring safety. The operating member 171 is a push type, which can make the shaft locking member 172 embedded in the shaft locking groove 1411, lock the rotation of the long shaft 141, and then lock the rotation of the output shaft 130, and the pushing direction of the operating member 171 is parallel to the long shaft 141. When the cutting machine 100 is used, the shaft locking assembly 170 can be switched to the unlocked state by pushing the operating member 171, and the operation is convenient.

[0159] At least part of the operating member 171 protrudes from the second casing 160, thereby facilitating the user to operate the shaft locking assembly 170. The second casing 160 is provided with a relief opening for the operating member 171 to extend out, the operating member 171 is elastically connected to the second casing 160, the operating member 171 can slide along a direction parallel to the long shaft 141, and the relief opening extends along the direction of the long shaft 141. The operating member 171 is provided with a protruding portion, the protruding portion protrudes from the casing 110 through the relief opening, and the protruding portion facilitates the user to push the operating member 171.

[0160] Reference Figures 35 to 38 Another alternative implementation of the shaft locking assembly 170 is provided. As shown in FIG. 6, the shaft locking assembly 170 comprises an operating member 171 and a shaft locking member 172 connected to each other, and the operating member 171 is arranged on the second casing 160. Figure 35As shown, similar to the foregoing, the shaft lock assembly 170 includes a shaft lock piece 172 capable of being embedded into a shaft lock groove 1411 to lock the rotation of the output shaft 130, the shaft lock groove 1411 can be connected to or formed on the transmission assembly 140, such as the long shaft 141, specifically, the long shaft 141 can be sleeved with a shaft lock disc containing the shaft lock groove 1411, of course, in other embodiments, the shaft lock groove 1411 can also be directly provided on the motor shaft 121 or the output shaft 130. The shaft lock assembly 170 further includes a support limiting piece 173 and an elastic piece 174. Among them, the elastic piece 174 is in abutment with the shaft lock piece 172 and always gives the shaft lock piece 172 a movement tendency of embedding into the shaft lock groove 1411 by relying on its own elastic deformation, for example, the elastic piece 174 can be a spring always in a compressed or stretched state, and one end of the elastic piece 174 is fixed. The shaft lock piece 172 will be rotated up or rotated down to disengage or embed into the above-mentioned shaft lock groove 1411 under the constraint of the support limiting piece 173 and the driving of the elastic piece 174, so as to achieve the switching of the shaft lock assembly 170 between the unlocked state and the locked state.

[0161] In this embodiment, the operating piece 171 can be rotary and can be connected to or formed on the above-mentioned shaft lock piece 172. The operating piece 171 rotates to switch between the unlocked position and the locked position, and the shaft lock assembly 170 can convert the rotation of the operating piece 171 into the rotation up or rotation down of the shaft lock piece 172. When the operating piece 171 rotates to the unlocked position, the shaft lock assembly 170 is in the unlocked state, and the shaft lock piece 172 disengages from the shaft lock groove 1411; when the operating piece 171 rotates to the locked position, the shaft lock assembly 170 is in the locked state, and the shaft lock piece 172 embeds into the shaft lock groove 1411. In some embodiments, the operating piece 171 can be provided on the second housing 160. In some embodiments, the rotation axis of the operating piece 171 is collinear or parallel to the rotation axis of the shaft lock piece 172.

[0162] The connection relationship among the above-mentioned operating piece 171, the shaft lock piece 172 and the support limiting piece 173 has multiple possibilities. In some embodiments, the support limiting piece 173 is fixedly connected to the second housing 172, the operating piece 171 is fixedly connected to the shaft lock piece 172, and the operating piece 171 and the shaft lock piece 172 are movably connected to the support limiting piece 173 and the second housing 160 and can rotate and translate relative to each other, and the following will be mainly exemplarily described with respect to this embodiment. In other embodiments, the operating piece 171 can also be non-fixedly connected to the shaft lock piece 172, and there can be an intermediate piece therebetween, as long as the rotation of the operating piece 171 can be converted into the rotation up or rotation down of the shaft lock piece 172. In yet other embodiments, the operating piece 171 can also be fixedly connected to the support limiting piece 173, and the operating piece 171 and the support limiting piece 173 are movably connected to the shaft lock piece 172 and the second housing 160 and can rotate and translate relative to the shaft lock piece 172 and the second housing 160, respectively.

[0163] In some embodiments, the support limiting member 173 has a helical track 1731 circumferentially arranged on the shaft locking member 172, and the shaft locking member 172 is connected or formed with a cooperating portion 1721 constrained by and moving along the helical track 1731, and the movement of the cooperating portion 1721 will drive the shaft locking member 172 to rotate upward or downward. In some embodiments, the shaft locking member 172 is provided with a radially protruding cooperating portion 1721, for example, a cooperating pin can be radially inserted into the shaft locking member 172 as the cooperating portion 1721, and the support limiting member 173 can be sleeved outside the shaft locking member 172 and has a circumferential ramp surface capable of abutting against the cooperating pin. It can be understood that the helical track is not strictly required to be arranged along a helix on the circumferential surface of the support limiting member 173, and it is sufficient to approximately satisfy the corresponding movement in the circumferential and axial directions when the shaft locking member 172 rotates and translates. In some embodiments, the support limiting member 173 is at least partially accommodated in the operating member 171, and specifically, the operating member 171 is provided with an accommodating groove facing the shaft locking member 172 and the support limiting member 173, and one end of the operating member 171 and / or the shaft locking member 172 can be partially inserted into the accommodating groove, and the helical track 1731 can be at least partially accommodated in the accommodating groove.

[0164] In some embodiments, the helical track 1731 of the support limiting member 173 is provided with a locking portion 1732 at both ends, and the cooperating portion 1721 will be limited by the locking portion 1732 when moving to both ends of the helical track 1731, so as to stop at the position, and thus the shaft locking assembly 170 is kept in the locked state or the unlocked state. In some embodiments, the locking portion 1732 includes a locking groove arranged at any end of the helical track 1731, and the cooperating portion 1721 falls into the groove to achieve self-locking, and the locking portion 1732 can also include a blocking wall arranged at one end of the helical track 1731 reached by the cooperating portion 1721 under the driving of the elastic member 174, and the like.

[0165] As Figure 37 , Figure 38As shown, the support limiting member 173 is fixedly installed on the second casing 160, the shaft locking member 172 is in the form of a rod and extends through the support limiting member 173 to enter the second casing 160 to act on the shaft locking groove 1411, the operating member 171 is in the form of a cap and is sleeved on one end of the support limiting member 173 away from the shaft locking groove 1411 and is fixedly connected with the shaft locking member 172, the elastic member 174 sleeved on the shaft locking member 172 is always in a compressed state, one end thereof away from the shaft locking groove 1411 is fixed, and the other end thereof is in abutment with the shaft locking member 172, the shaft locking member 172 driven by the elastic member 174 rotates upward or downward because the cooperation part 1721 in the form of a pin extending radially is constrained in the circumferential direction by the spiral track 1731. When the operating member 171 rotates from the unlocking position to the locking position, the external force of the operating member 171 rotating drives the cooperation part 1721 originally falling into the locking groove 1732 at one end of the spiral track 1731 and being in self-locking to move out of the locking groove 1732 and be separated from the self-locking, and then the shaft locking member 172 rotates downward and is embedded into the shaft locking groove 1411 below under the driving of the elastic member 174 and the constraint of the spiral track 1731 on the abutted cooperation part 1721, until the cooperation part 1721 reaches the other end of the spiral track 1731 and is limited by the blocking wall 1732 and cannot continue to move, and the shaft locking assembly 170 remains in the locking state.

[0166] When the operating member 171 rotates from the locking position to the unlocking position, the external force of the operating member 171 rotating drives the shaft locking member 172 to overcome the driving of the elastic member 174, the blocking wall 1732 originally limiting the cooperation part 1721 no longer acts because of the reverse movement of the cooperation part 1721, the shaft locking member 172 rotates upward under the constraint of the spiral track 1731 on the abutted cooperation part 1721, is separated from the shaft locking groove 1411, until the cooperation part 1721 falls into the locking groove 1732 at the other end of the spiral track 1731 and cannot continue to move, and the shaft locking assembly 170 remains in the unlocking state.

[0167] In some embodiments, a guide surface 1412 is arranged between adjacent shaft locking grooves 1411, in the case that the shaft locking member 172 rotates and translates and the shaft locking groove 1411 is not located exactly above or below the shaft locking member 172, the shaft locking member 172 rotates and translates to the guide surface 1412 and can slide along the guide surface 1412 relative to the shaft locking groove 1411 to finally be embedded into the shaft locking groove 1411. Specifically, the guide surface 1412 can be an arc surface or an inclined surface between adjacent shaft locking grooves 1411 and the edge of the guide surface 1412 can be flush with the opening of the shaft locking groove 1411, for example, a plurality of shaft locking grooves 1411 can be arranged along the radial direction to the center of the shaft locking disc, adjacent shaft locking grooves 1411 can be spaced at equal distances or angles, and the outer circumferential surface of the shaft locking disc between the shaft locking grooves 1411 can be the guide surface 1412.

[0168] The shaft locking assembly 170 including the operating member 171, the shaft locking member 172, the supporting limiting member 173 and the elastic member 174 can be applied to other electric tools in addition to the cutting machine 100. A shaft locking groove is arranged on the motor shaft, the output shaft or the transmission assembly, and the shaft locking assembly 170 is used to lock and release the output shaft in the manner described above.

[0169] A bearing is arranged between the long shaft 141 and the second housing 160, and the bearing supports the long shaft 141. The second housing 160 is provided with a bearing chamber for mounting the bearing. The second housing 160 can be a split structure to facilitate mounting of the transmission assembly 140 and the output shaft 130. A bearing is arranged between the output shaft 130 and the second housing 160, and the bearing supports the output shaft 130.

[0170] Referring to Figures 1 to 5 , Figures 8 to 20 The cutting machine 100 further includes a circuit board assembly 180 including a circuit board 181 and a heat dissipation member 182. The circuit board 181 is connected to the heat dissipation member 182. In use, the circuit board 181 generates heat, and the heat is transferred to the heat dissipation member 182. The heat dissipation member 182 is used to physically dissipate heat from the circuit board 181. The housing 110 has an opening, and the heat dissipation member 182 is at least partially exposed to the housing 110 through the opening. The heat dissipation member 182 can be exposed to the outside of the housing 110 or opposite the opening of the housing 110 to contact and exchange heat with the outside space, thereby achieving natural heat dissipation and improving heat dissipation effect.

[0171] The circuit board 181 is arranged on one side of the heat dissipation member 182, and the circuit board 181 and the heat dissipation member 182 are in surface-to-surface contact to increase the contact area and improve the heat dissipation effect. In some embodiments, the heat dissipation member 182 is a heat dissipation box. In some embodiments, the heat dissipation member 182 is a heat dissipation fin. In some embodiments, the heat dissipation member 182 is an aluminum member.

[0172] When the heat dissipation member 182 is a heat dissipation box, the side of the heat dissipation box away from the circuit board 181 has a plurality of heat dissipation through holes 1821. The heat dissipation through holes 1821 penetrate the box body of the heat dissipation box in a direction parallel to the plane of the circuit board 181 to increase the heat dissipation area of the heat dissipation box and improve the heat dissipation efficiency. In some embodiments, the circuit board 181 is arranged on the top of the heat dissipation box, and the heat dissipation through holes 1821 are arranged on the bottom of the heat dissipation box. The bottom surface of the heat dissipation box is exposed to the outside of the housing 110 or opposite the opening of the housing 110. The top of the heat dissipation box is provided with a receiving cavity for accommodating the circuit board 181.

[0173] The circuit board 181 is located below the motor 120, and the projection of the circuit board 181 and the motor 120 in the up-down direction at least partially overlaps, thereby making full use of the space and reasonably arranging the layout.

[0174] The cutting machine 100 further comprises a heat conducting member 190 connected to the casing 110, the heat conducting member 190 being at least partially exposed outside the casing 110, and the heat dissipating member 182 being at least partially exposed to the casing 110 through the opening and in thermal contact with the heat conducting member 190. Heat on the heat dissipating member 182 can be transferred to the heat conducting member 190, which is in contact with the external space for heat exchange, achieving natural heat dissipation and further improving the heat dissipation effect.

[0175] In some embodiments, the opening is located at the front bottom of the casing 110, the heat conducting member 190 is connected to the casing 110 around the opening and has a heat conducting plane covering the opening, and the heat dissipating member 182 is attached to the heat conducting plane. Through the surface-to-surface contact, the contact area between the heat dissipating member 182 and the heat conducting member 190 is increased, the heat conduction area is increased, and the heat dissipation effect is improved.

[0176] The heat conducting member 190 is a wear-resistant metal member to improve the heat dissipation effect. In some embodiments, the heat conducting member 190 is bent into a U-shaped or V-shaped shape to fit the casing 110. The edge of the heat conducting member 190 is bent to cover the opening around the casing 110. In some embodiments, the heat conducting member 190 covers the junction of the bottom and the front of the main body 111. The heat conducting member 190 and the casing 110 can be connected by screws. In some embodiments, the heat conducting member 190 is made of nickel-iron alloy.

[0177] The heat conducting member 190 not only has a heat conducting effect, but also has a supporting effect. The bottom surface of the heat conducting member 190 forms or supports the above-mentioned supporting surface, which supports the cutting machine 100 when the cutting machine 100 is placed horizontally. By setting the heat conducting member 190 as a wear-resistant metal member, wear is reduced, and the heat dissipation and supporting effects are guaranteed.

[0178] The cutting machine 100 further comprises a sealing member 183 arranged around the opening and filling the gap between the casing 110, the heat dissipating member 182 and the heat conducting member 190. The sealing member 183 is used to prevent water from entering the inside of the casing 110. The sealing member can be a sealing ring or a sealing strip or other sealing structure. As shown in the drawings, the sealing member 183 is a sealing ring made of rubber, which is sleeved on the bottom of the heat dissipating box and fills the gap between the heat dissipating box and the bottom opening of the casing 110. At the same time, it also has a positioning and protection edge extending outward along the heat conducting plane for a certain length. Figure 19

[0179] ​In some embodiments, the heat-conducting member 190, the heat-dissipating member 182, and the second housing 160 are connected; the heat-dissipating member 182, the heat-conducting member 190, the second housing 160, and the saw blade 150 are made of conductive material, and the static electricity generated during the cutting process is transmitted to the saw blade 150 through the heat-dissipating member 182, the heat-conducting member 190, and the second housing 160, and then released to the ground. In some embodiments, the heat-conducting member 190 is fixedly connected with the housing 110, and the connection between the heat-conducting member 190 and the second housing 160 can be abutting or overlapping, so as to facilitate the transmission of static electricity. In some embodiments, any two of the heat-dissipating member 182, the heat-conducting member 190, the second housing 160, and the saw blade 150 can be connected by using a screw or a bolt made of conductive material.

[0180] The cutting machine 100 provided in the present application not only dissipates heat through the heat-dissipating member 182 contacting the heat-conducting member 190, but also sprays cooling liquid to the saw blade 150 to dissipate heat, thereby combining natural heat dissipation and water-cooling heat dissipation, and improving the heat dissipation effect.

[0181] The cutting machine 100 further comprises a liquid cooling system 210, which sprays cooling liquid to the saw blade 150 when the saw blade 150 performs cutting, and the movement route of the cooling liquid after being separated from the saw blade 150 will pass through the heat-conducting member 190. By spraying cooling liquid to the heat-conducting member 190, the heat-conducting member 190 is cooled, thereby combining natural heat dissipation and water-cooling heat dissipation, and further improving the heat dissipation effect of the heat-conducting member 190 on the circuit board 181 and the like. Generally, the saw blade 150 rotates in the counterclockwise direction, and the cooling liquid sprayed by the liquid cooling system 210 to the saw blade 150 is driven by the rotating saw blade 150, and is basically thrown out in the tangential direction of the saw blade 150 at the lower part of the saw blade 150, and the water flow is sprayed to the heat-conducting member 190 by inertia. Figure 8 The arrow direction shows the spraying direction of part of the cooling liquid.

[0182] The liquid cooling system 210 comprises a transmission pipe 211 for transmitting cooling liquid. In some embodiments, a groove is formed in the inner bottom of the housing 110, and the transmission pipe 211 can pass through the groove, and the extension path of the transmission pipe 211 is attached to the housing 110 around the periphery of the circuit board assembly 180. Through the flow of the cooling liquid in the transmission pipe 211, part of the heat emitted by the circuit board 181 is taken away, thereby further improving the water-cooling heat dissipation effect. Part of the transmission pipe 211 can be squeezed into the groove in the housing 110, and part of the transmission pipe 211 can be limited by buckles or clamps, so that the position of the transmission pipe 211 is stable.

[0183] The projection of the transmission pipe 211 in the up-down direction is at least partially coincident with the projection of the circuit board 181; and / or, the projection of the transmission pipe 211 in the up-down direction is at least partially coincident with the projection of the heat dissipation member 182. While dissipating heat, the space is fully utilized, the structure is compact, and the layout is reasonable. In some embodiments, the transmission pipe 211 is arranged above the circuit board 181. In other embodiments, the transmission pipe 211 can also not have a projection in the up-down direction with the circuit board assembly 180 to avoid the influence of water vapor brought by the transmission pipe 211 on the safety of the circuit board assembly 180.

[0184] One of the benefits of the present application is that the cabinet has an opening, and the heat dissipation member is at least partially exposed to the cabinet through the opening and in thermal contact with the heat conduction member. The heat dissipation member connected to the circuit board in the cutting machine can achieve contact heat exchange with the space outside the cabinet through the opening of the cabinet, and can also transmit heat to the heat conduction member outside the cabinet through thermal contact with the heat conduction member, thereby having excellent heat dissipation effect.

[0185] The cutting machine 100 further comprises a shroud 220, and the saw blade 150 is partially accommodated in the shroud 220. The liquid cooling system 210 comprises a left nozzle 212 and a right nozzle 213. The left nozzle 212 is arranged on the left end face of the shroud 220, and the right nozzle 213 is arranged on the right end face of the shroud 220. The left nozzle 212 and the right nozzle 213 penetrate the shroud 220 to output the cooling liquid. Of course, the liquid cooling system 210 of the cutting machine 100 can also use only a single nozzle to cool the saw blade 150, and the following nozzle-related embodiments can be applied to the single nozzle by analogy.

[0186] In some embodiments, as shown in Figures 17 to 20 and Figure 30 The left nozzle 212 can comprise a first piece 2121 and a second piece 2122. The first piece 2121 is connected to the shroud 220, for example, can be clamped on the left and right end faces of the shroud 220, and has a through hole penetrating the shroud 220. The transmission pipe 211 can be connected to the first piece 2121 to be connected to the through hole to output the cooling liquid. For example, the first piece 2121 has a protruding part for the transmission pipe 211 to be sleeved, and the protruding part is internally penetrated and connected to the through hole. In some embodiments, the installation of the first piece 2121 and the shroud 220 also has a foolproof design to ensure the correct installation position. The second piece 2122 is detachably connected to the first piece 2121. When the second piece 2122 is installed to the first piece 2121, the end of the through hole away from the saw blade 150 is blocked and closed by the second piece 2122. When the second piece 2122 is detached from the first piece 2121, the end of the through hole away from the saw blade 150 is open outward. As shown in Figure 20As shown, the first piece 2121 has a through hole co-linear with the output shaft 130, and another through hole circumferentially connected to the through hole for the access of the transmission pipe 211. The second piece 2122 is a nut screwing with the outer circumferential surface of the first piece 2121. When tightened, the nut blocks the through hole away from the end of the saw blade 150, so that the cooling liquid from the transmission pipe 211 is unidirectionally sprayed to the saw blade 150. When disassembled, the through hole is open at both ends, and the user can conveniently and effectively clean the dust accumulated in the through hole by using a needle or rod. In some embodiments, the second piece 2122 can be of the same type as the nut used when the saw blade 150 is installed on the output shaft 130, so that the related accessories are more versatile and not cumbersome. In some embodiments, a waterproof ring is further arranged in the second piece 2122 or the nut, and the contact surface between the second piece 2122 and the first piece 2121 and / or the contact surface between the second piece 2122 and the shroud 220 is sealed and waterproofed by the waterproof ring. Equivalently, in some embodiments, the right nozzle 213 can also include a first piece and a second piece. In some embodiments, the left and right nozzles 212 and 213 are made of aluminum, which is wear-resistant and easy to process.

[0187] In some embodiments, the transmission pipe 211 passes out from between the second housing 160 and the shroud 220 at the front end of the machine housing 110, and is connected to the left nozzle 212 and the right nozzle 213 while crossing above the shroud 220. The transmission pipe 211 is fixedly connected to the second housing 160, for example, by a screw connection.

[0188] The shroud 220 is provided with a shroud handle 230 for the user to operate to rotate the shroud 220, and the transmission pipe 211 is limited by the shroud handle 230 when crossing above the shroud 220. The shroud handle 230 and the shroud 220 can be locked by a screw. In some embodiments, the transmission pipe 211 is clamped between the shroud 220 and the shroud handle 230. In some embodiments, the transmission pipe 211 passes through the shroud handle 230.

[0189] The cutting machine 100 further includes a support guide 240 having a support portion 241 located between the second housing 160 and the shroud 220, and the transmission pipe 211 passes through and is limited by the support portion 241. In some embodiments, the support portion 241 is provided with a groove for the transmission pipe 211 to pass through. In some embodiments, the support portion 241 is provided with a pipe for the transmission pipe 211 to pass through. The support guide 240 and the shroud 220 can be locked by a screw.

[0190] The support guide 240 also has a guide groove at the rear of the shroud 220, and part of the shroud 220 is inserted into the guide groove, which supports and guides the shroud 220 and does not affect the rotation of the shroud 220. In some embodiments, the support guide 240 is a split structure, which is convenient for installation and disassembly. The support guide 240 includes a support part 241 and a guide part 242, which are distributed on the left and right sides of the shroud 220, and the support part 241 and the guide part 242 are buckled to each other to form a guide groove. The support part 241 and the guide part 242 can be threadedly connected with the shroud 220.

[0191] The lower part of the shroud 220 is provided with a water baffle 250. The liquid cooling system 210 sprays cooling liquid to the saw blade 150 when the saw blade 150 is cutting, and the water baffle 250 can reduce water splashing and prevent water from entering the machine shell 110. The water baffle 250 and the shroud 220 can be locked by screws. The water baffle 250 and the guide part 242 can be integrally formed, which is convenient for processing and production.

[0192] The second machine shell 160 is located at the front of the machine shell 110, and the shroud 220 is located at the front of the machine shell 110. The second machine shell 160 and the shroud 220 are arranged along the left and right directions. The support guide 240 is clamped between the second machine shell 160 and the shroud 220. The second machine shell 160, the support guide 240, and the shroud 220 are connected to increase the structural strength.

[0193] In some embodiments, the liquid cooling system 210 also includes an inlet valve 214, and the transmission pipe 211 is used to transmit cooling liquid, and the inlet valve 214 is arranged on the transmission pipe 211. The inlet valve 214 is located outside the machine shell 110 and is convenient for being operated by a user. In some embodiments, the inlet valve 214 is arranged at the rear side of the holding part, and the user can operate the inlet valve 214 when holding the holding part. In the preceding text, the holding part includes a main handle 112 located at the rear of the main body part 111. In some embodiments, the above-mentioned inlet valve 214 can be arranged below the right side surface of the main handle 112 and can be directly connected with the water inlet.

[0194] In some embodiments, the flow rate of the cooling liquid in the transmission pipe 211 is a constant value, and the inlet valve 214 functions as a switch. In some embodiments, the inlet valve 214 adjusts the flow rate of the cooling liquid in the transmission pipe 211. The inlet valve 214 and the machine shell 110 can be fixed by screws. In some embodiments, the inlet valve 214 is a rotary ball valve, and the valve hole opening degree of the inlet valve 214 can be adjusted to adjust the flow rate of the cooling liquid in the transmission pipe 211.

[0195] The cutting machine 100 provided in the present application also uses air cooling to dissipate heat. The cutting machine 100 further comprises a fan 260 mounted on the motor shaft 121. The machine housing 110 has an air inlet 114 and an air outlet 115. The heat dissipation airflow enters the machine housing 110 through the air inlet 114, then flows through the circuit board assembly 180 and the motor 120 in sequence, and is blown out from the air outlet 115, while dissipating heat for the circuit board assembly 180 and the motor 120.

[0196] When the heat dissipation airflow flows through the circuit board assembly 180, it passes through the heat dissipation member 182, which carries away the heat on the heat dissipation member 182. In some embodiments, the heat dissipation member 182 is a heat dissipation box, and the side of the heat dissipation box away from the circuit board 181 has a plurality of heat dissipation through holes 1821 that penetrate the box body of the heat dissipation box in a direction parallel to the plane in which the circuit board 181 lies. By providing the heat dissipation through holes 1821 on the heat dissipation box, the heat dissipation area is increased, the airflow speed on the heat dissipation surface is increased, and the heat dissipation effect is improved.

[0197] In some embodiments, the heat dissipation through holes 1821 extend in the left-right direction of the machine housing 110. In some embodiments, the heat dissipation through holes 1821 extend in a straight line. In some embodiments, the heat dissipation through holes 1821 extend in a curve to lengthen the heat dissipation path. In some embodiments, the plurality of heat dissipation through holes 1821 are distributed in multiple rows in the front-rear or up-down direction.

[0198] In some embodiments, the cutting machine 100 further comprises an air guide plate 270 connected to the machine housing 110 and located in the machine housing 110. The machine housing 110, the air guide plate 270, and the heat dissipation box form a first airflow channel between the air inlet 114 and the heat dissipation through holes 1821. The heat dissipation airflow enters the machine housing 110 through the air inlet 114, then passes through the first airflow channel and the heat dissipation through holes 1821 in sequence. The first airflow channel is in a substantially sealed state between the air inlet 114 and the heat dissipation through holes 1821. The air guide plate 270 guides the heat dissipation airflow. By providing the above-mentioned sealed first airflow channel, it is convenient to form negative pressure in the first airflow channel, which facilitates the smooth flow of external airflow into the machine housing 110.

[0199] The shape of the air guide plate 270 can be set according to actual needs to guide the airflow to flow to the heat dissipation member 182. In some embodiments, the air guide plate 270 is in a stepped shape. The air guide plate 270 and the machine housing 110 can be connected by screws.

[0200] The casing 110 has an air outlet 115, and the motor 120 has a motor casing 123. The casing 110 and the motor casing 123 form a second airflow channel between the motor 120 and the air outlet 115. The cooling airflow passes through the motor 120 in the motor casing 123 and is blown out of the air outlet 115 through the second airflow channel. The second airflow channel is substantially sealed between the motor 120 or the motor casing 123 and the air outlet 115. The sealed second airflow channel facilitates the formation of negative pressure in the second airflow channel, which promotes the smooth inflow of external air into the motor casing 123.

[0201] When the motor 120 rotates, the fan 260 is driven to rotate, so that the first airflow channel and the second airflow channel both form negative pressure. External air enters the casing 110 from the air inlet 114, passes through the first airflow channel and the cooling through-hole 1821 in sequence, enters the motor casing 123, and is blown out of the air outlet 115 through the second airflow channel after passing through the motor 120 in the motor casing 123. Figure 11 、 Figure 12 、 Figure 14 and Figure 16 The dashed arrows in the figures show the direction of airflow.

[0202] In some embodiments, the cooling box is located below the motor 120, and the cooling box and the projection of the motor 120 in the vertical direction at least partially overlap, facilitating the cooling airflow to pass through the cooling through-hole 1821 and then enter the motor casing 123 through the inner cavity of the casing 110.

[0203] In some embodiments, the air inlet 114 is arranged at the rear of the casing 110, and the air outlet 115 is arranged at the front of the casing 110, guiding the airflow to flow from rear to front, extending the flow path of the cooling airflow, and cooling the components such as the circuit board 181, the cooling box, and the motor 120. In some embodiments, the air inlet 114 is located at the left wall and / or the right wall of the middle rear of the casing 110, and the air outlet 115 is located at the front of the casing 110. In some embodiments, the air outlet 115 is located at the left wall and / or the right wall of the front of the casing 110. In some embodiments, the air outlet 115 is located at the left wall and the right wall of the front of the casing 110, and the air outlet 115 is open to both sides, improving the cooling effect.

[0204] In some embodiments, the air inlet 114 includes a plurality of air inlet holes that are spaced apart on the casing 110 to fully utilize the air inlet space on the casing 110 and increase the air inlet area. The air inlet holes are circular, elliptical, or strip-shaped. In some embodiments, the air outlet 115 includes a plurality of air outlet holes that are spaced apart on the casing 110 to fully utilize the air outlet space on the casing 110 and increase the air outlet area. The air outlet holes are circular, elliptical, or strip-shaped.

[0205] The air-cooled heat dissipation path is isolated from the water-cooled heat dissipation path, so that the water-cooled coolant cannot be sprayed into the interior of the casing 110.

[0206] Referring to Figures 17 to 22 The cutting machine 100 further comprises a shroud adjusting mechanism 280, the shroud 220 is connected with the second casing 160 through the shroud adjusting mechanism 280, the shroud adjusting mechanism 280 comprises an adjusting bolt 281 and an adjusting handle 282; the shroud 220 is provided with a rotating track 221 on the side close to the second casing 160, one end of the adjusting bolt 281 is fixedly connected with the second casing 160, and the other end is rotatably connected with the shroud 220 through the rotating track 221, the adjusting handle 282 releases or locks the relative rotation between the adjusting bolt 281 and the shroud 220, so as to lock or release the relative rotation between the second casing 160 and the shroud 220.

[0207] In some embodiments, the rotation center line of the shroud 220 coincides with the output axis 131 of the output shaft 130, and the rotating track 221 is arranged in a circular arc shape around the rotation center line, facilitating smooth rotation. The adjusting bolt 281 is threadedly connected with the second casing 160, one end of the adjusting bolt 281 is provided with the adjusting handle 282, and the other end of the adjusting bolt 281 can abut against the elastic gasket 283, so that at least part of the elastic gasket 283 is inserted into the rotating track 221, and the shroud 220 is locked by the friction force between the elastic gasket 283 and the shroud 220.

[0208] The shroud adjusting mechanism 280 steplessly adjusts the rotation angle of the shroud 220 around the output shaft 130, and the rotation angle of the shroud 220 around the output shaft 130 is 0° to 45°. Figure 21 Fig. 4 shows the state of the shroud 220 in the first position, Figure 22 Fig. 5 shows the state of the shroud 220 in the second position, the shroud 220 is rotated from the first position to the second position, and the rotation angle is 45°.

[0209] In the foregoing, the transmission pipe 211 can pass between the second casing 160 and the shroud 220 and then pass above the shroud 220 and be connected with the left and right nozzles 212 and 213, and the shroud 220 is adjusted by the shroud adjusting mechanism 280 and can rotate within a certain angle range around the output shaft 130, and the above-mentioned transmission pipe 211 having a connection relationship with one or more of the second casing 160, the shroud 220 and the left and right nozzles 212 and 213 can be bent during the rotation of the shroud 220, causing the problem of poor water outlet, in some embodiments, as Figure 29As shown, at least part of the inside of the transmission pipe 211 can be provided with an elastic support 2112 to support the waterway space in the pipe when the shroud 220 rotates, and to avoid the transmission pipe 211 from being bent and blocking water. Specifically, at least part of the inside of the transmission pipe 211 between the second casing 160 and the shroud 220 or between the second casing 160 and the left nozzle 212 or between the second casing 160 and the right nozzle 213 is filled with a spring.

[0210] Referring to Figure 1 、 Figure 10 、 Figures 23 to 25 The cutting machine 100 further comprises a battery pack 290, which at least supplies power to the motor 120. The inside of the main body part 111 of the casing 110 is formed with a battery compartment 1111 for installing the battery pack 290. In order to maintain the balance of the whole machine, the motor 120 is located at the front side of the main body part 111, and the battery pack 290 is located at the rear side of the main body part 111. In this application, the casing 110 of the cutting machine 100 comprises the main body part 111 and a battery compartment cover 116, and the battery compartment 1111 in the main body part 111 can be formed in a sealed state and extend in the left-right direction by closing the battery compartment cover 116. The battery pack 290 can be combined to the battery compartment 1111 in the left-right direction of the casing 110 to adapt to the arrangement of the whole machine. In some embodiments, the front part of the main body part 111 where the motor 120 is located and the battery compartment 1111 where the battery pack 290 is located have a partition to separate them, so that the front part of the main body part 111 which uses air cooling does not affect the sealing of the battery compartment 1111.

[0211] The battery pack 290 and the battery compartment 1111 are detachably connected, which facilitates the replacement of the battery pack 290. Specifically, it can be clamped, threaded or magnetically connected. In some embodiments, one of the battery pack 290 and the battery compartment 1111 is provided with a first clasp 291, and the other is provided with a first clamping groove. The first clasp 291 cooperates with the first clamping groove to realize the locking of the battery pack 290 and the battery compartment 1111. In some embodiments, the first clasp 291 is provided on the shell of the battery pack 290, and the first clamping groove is provided on the inner wall of the battery compartment 1111.

[0212] The cutting machine 100 further comprises a battery pack ejection mechanism 310 provided on the inner wall of the battery compartment 1111. When the first clasp 291 is disengaged from the first clamping groove, the battery pack ejection mechanism 310 at least partially ejects the battery pack 290 from the battery compartment 1111 in the plug-in direction.

[0213] The battery pack ejection mechanism 310 includes an ejector, which is elastic by itself. When the battery pack 290 is installed into the battery compartment 1111, the ejector is compressed and deformed. When the first clasp 291 is disengaged from the first clamping groove, the ejector restores the deformation under the action of the elastic force and applies an external force to the battery pack 290 to disengage the battery pack 290 from the battery compartment 1111, so that the battery pack 290 is at least partially ejected from the battery compartment 1111, facilitating the disassembly of the battery pack 290.

[0214] The battery pack 290 includes a third operating member 294. By pressing the third operating member 294, the first clasp 291 can be disengaged from the first clamping groove. When disassembling the battery pack 290, the third operating member 294 can be pressed so that the first clasp 291 is disengaged from the first clamping groove, and the ejector restores the deformation under the action of the elastic force and applies an external force to the battery pack 290 to disengage the battery pack 290 from the battery compartment 1111. When the battery pack 290 is locked with the battery compartment 1111, the third operating member 294 is located at a position that is convenient for the user to operate. In some embodiments, the first clasp 291 is arranged at the top of the battery pack 290, and the third operating member 294 is arranged at the upper left or upper right of the battery compartment cover 116.

[0215] The third operating member 294 is linked with the first clasp 291, and the first clasp 291 is elastically connected with the shell of the battery pack 290. By pressing or releasing the third operating member 294, the first clasp 291 can be moved so that the first clasp 291 can be disengaged from the first clamping groove.

[0216] The battery compartment cover 116 has a closed state and an open state. In the closed state, the battery compartment cover 116 seals the battery compartment 1111. In the open state, the battery compartment 1111 is opened, and the battery pack 290 is detachably plugged into the battery compartment 1111 along the left-right direction.

[0217] The battery compartment cover 116 and the main body part 111 can be connected by clamping, threaded connection or magnetic attraction. In some embodiments, one end of the battery compartment cover 116 is rotationally connected with the main body part 111, and the other end of the battery compartment cover 116 is clamped with the main body part 111. In some embodiments, one of the battery compartment cover 116 and the main body part 111 is provided with a second clamping groove 1161, and the other is provided with a second clasp 1112. The second clasp 1112 cooperates with the second clamping groove 1161 to achieve the sealing of the battery compartment 1111. In some embodiments, the second clamping groove 1161 is arranged on the battery compartment cover 116, and the second clasp 1112 is arranged on the main body part 111. In some embodiments, the battery compartment cover 116 is clamped with the main body part 111, and a plurality of clamps are arranged at intervals along the circumference of the battery compartment cover 116.

[0218] The battery compartment cover 116 is rotationally connected with the main body 111, and the battery compartment cover 116 can rotate around a rotation axis. The rotation axis is perpendicular to the bottom surface of the machine housing 110. The bottom of the machine housing 110 has a support surface for supporting the cutting machine 100 when the cutting machine 100 is horizontally placed. The rotation axis is perpendicular to the support surface. When the battery pack 290 is installed or removed, the cutting machine 100 can be horizontally placed so that the support surface supports the cutting machine 100, facilitating the installation and removal operations.

[0219] In some embodiments, the rotation axis extends in the up-down direction of the machine housing 110, and the battery compartment cover 116 can be flipped forward and backward. The battery compartment cover can be arranged on the left side or the right side of the machine housing 110. In some embodiments, the rotation axis extends in the up-down direction and is arranged away from the main handle 112. During the opening of the battery compartment cover 116, the battery compartment cover is flipped from back to front to avoid interfering with the user's hand holding the main handle 112. Compared with other arrangements in which the rotation axis extends in the front-back direction, the battery compartment cover 116 does not need to overcome gravity when it is opened.

[0220] In some embodiments, in the open state, the battery compartment cover 116 is freely rotatable around the rotation axis between 0 and 180° relative to the closed state. In some embodiments, in the open state, the battery compartment cover 116 is rotated around the rotation axis to a preset angle relative to the closed state and is kept at the preset angle. The preset angle is greater than or equal to 90° and less than or equal to 180°.

[0221] In some embodiments, the battery compartment cover 116 is rotationally connected with the main body 111 through a connecting shaft 117. The connecting shaft 117 extends along the rotation axis. The connecting shaft 117 is connected with an elastic member 118. When the second buckle 1112 is disengaged from the second clamping groove 1161, the elastic member 118 causes the battery compartment cover 116 to rotate around the rotation axis to a preset angle relative to the closed state and keep at the preset angle. The elastic member 118 can be a torsional spring. The torsional spring can provide a pop-out force for the opening of the battery compartment cover 116, facilitating the smooth opening of the battery compartment cover 116 to the preset angle. In some embodiments, a limiting protrusion can be arranged to limit the battery compartment cover 116, so that the battery compartment cover 116 is kept at the preset angle.

[0222] The inner wall of the battery compartment 1111 is provided with circuit wiring and a terminal seat 320. The circuit wiring and the terminal seat 320 are connected, and the terminal seat 320 is used for terminal plugging of the battery pack 290. When the battery pack 290 is inserted into the battery compartment 1111, the terminals of the battery pack 290 are plugged into the terminal seat 320. The cutting machine 100 further comprises a wiring cover plate 330 arranged in the battery compartment 1111. The wiring cover plate 330 cooperates with the inner wall of the battery compartment 1111 to limit the circuit wiring, so as to prevent the circuit wiring from being warped.

[0223] In some embodiments, the terminal seat 320 is arranged on the upper inner wall of the battery compartment 1111; the circuit wiring and the line cover plate 330 are arranged on the left inner wall or the right inner wall of the battery compartment 1111 away from the battery compartment cover 116. In some embodiments, the terminal seat 320 is arranged on the lower inner wall or the left inner wall or the right inner wall of the battery compartment 1111.

[0224] In some embodiments, the busbar current of the cutting machine 100 is greater than or equal to 70A, that is, the power supply current of the battery pack 290 is greater than or equal to 70A, and the cable size of the busbar used by the battery pack 290 in the cutting machine 100 to supply power to the motor 120 and the circuit board assembly 180 and other components is greater than or equal to 12 AWG (American Wire Gauge). It can be understood that under the above American Wire Gauge standard, the larger the number is, the smaller the wire diameter is, and the busbar cable size greater than or equal to 12 AWG described in the foregoing includes the case of 10 AWG, 8 AWG, etc. Equivalently, the cable diameter (single, solid, circular wire diameter) of the busbar used by the battery pack 290 in the cutting machine 100 to supply power to the motor 120 and the circuit board assembly 180 and other components is greater than or equal to 2.053 mm or greater than or equal to 0.0808 inch. In some embodiments, the busbar current of the cutting machine 100 is greater than or equal to 80A, the busbar cable size in the cutting machine 100 is greater than or equal to 10 AWG, that is, the busbar cable diameter is greater than or equal to 2.588 mm or 0.1019 inch; so as to adapt to the high-power working condition of the cutting machine 100 and provide better current conduction capability and heat dissipation effect.

[0225] In some embodiments, the weight of the cutting machine 100 including the battery pack 290 is between 6.0 kg and 7.5 kg, and the weight of the cutting machine 100 excluding the battery pack 290 is between 4.5 kg and 5.5 kg.

[0226] In some embodiments, the weight of the battery pack 290 is 1.0 kg-2.0 kg. When the output voltage of the battery pack 290 is 18V, the output current is 60A-155A; when the output voltage of the battery pack 290 is 24V, the output current is 55A-130A.

[0227] In some embodiments, the size of the battery compartment 1111 is 90 mm-130 mm in the up-down direction of the machine shell 110, 90-130 mm in the front-rear direction of the machine shell 110, and 140 mm-170 mm in the left-right direction of the machine shell 110. Among them, the size of the above-mentioned battery compartment 1111 is the inner size thereof.

[0228] In some embodiments, the output power of the motor 120 is 1.2 kW-2.4 kW. In some embodiments, the output power of the motor 120 is 1.4 kW-2.0 kW.

[0229] The cutting machine 100 further comprises a liquid cooling system 210 for spraying cooling liquid to the saw blade 150 when the saw blade 150 is cutting; the liquid cooling system 210 comprises a transmission pipe 211 for transmitting the cooling liquid, in some embodiments, the projection of the transmission pipe 211 in the left-right direction does not coincide with the battery compartment cover 116, so as to avoid the arrangement of the transmission pipe 211 affecting the opening or closing of the battery compartment cover 116.

[0230] In some embodiments, the water inlet of the transmission pipe 211 is arranged at the rear side of the holding portion, the transmission pipe 211 extends from the rear to the front at the lower portion of the machine shell 110, and avoids interfering with the opening or closing of the battery compartment cover 116.

[0231] The housing of the battery pack 290 is provided with a prompt member 292 for displaying the state information of the battery pack 290; the machine shell 110 has a transparent portion 119 corresponding to the position of the prompt member 292, and the state information displayed by the prompt member 292 can be observed through the transparent portion 119. The operator can intuitively observe the state information.

[0232] In some embodiments, a window is formed on the machine shell 110, and a transparent cover is arranged at the window to form the above-mentioned transparent portion 119. In some embodiments, the transparent portion 119 is detachably connected with the machine shell 110, so as to facilitate replacement and cleaning. The transparent portion 119 and the machine shell 110 can be connected by clamping, screwing or magnetic attraction.

[0233] In some embodiments, the prompt member 292 displays at least the remaining capacity information of the battery pack 290. In some embodiments, the prompt member 292 is a remaining capacity indicator light of the battery pack 290. In some embodiments, the prompt member 292 is a display screen. The prompt member 292 can display numbers to accurately display the percentage of the remaining capacity of the battery pack 290. The prompt member 292 can also display the range of the remaining capacity by color change. In some embodiments, green represents sufficient capacity, orange represents insufficient capacity, and red represents extremely low capacity.

[0234] The machine shell 110 comprises a main body portion 111, a holding portion at least partially located at the rear of the main body portion 111, and a battery compartment cover 116 for sealing the battery compartment 1111; the transparent portion 119 is located at the main body portion 111; and / or, the transparent portion 119 is located at the battery compartment cover 116. In some embodiments, the transparent portion 119 is located at the upper rear side of the main body portion 111 and in front of the holding portion, so that even if the user holds the holding portion, the transparent portion 119 will not be blocked, facilitating the user to observe.

[0235] The first operation member 340 is arranged on the casing 110 and is used by the user to operate the prompt member 292 to display the state information. When the first operation member 340 is triggered, the prompt member 292 displays the state information. When the first operation member 340 is not triggered, the prompt member 292 does not display the state information, so as to save the power. The first operation member 340 is used by the user to operate, which can be pressed by the user or be poked or rotated by the user.

[0236] In some embodiments, when the first operation member 340 is triggered, the prompt member 292 displays the state information, and after the state information is displayed for a first set time, the prompt member 292 does not display the state information. When the prompt member 292 is the remaining power indicator, the first operation member 340 is triggered, the remaining power indicator is turned on, and after the remaining power indicator is turned on for the first set time, the remaining power indicator is turned off.

[0237] The casing of the battery pack 290 also has a second operation member 293 used by the user to operate the prompt member 292 to display the state information, and the second operation member 293 is connected with the first operation member 340. When the user operates the first operation member 340 externally, the first operation member 340 acts on the second operation member 293 to make the prompt member 292 display the state information, so as to convert part of the original information display function of the battery pack 290.

[0238] In some embodiments, the first operation member 340 is arranged on the battery compartment cover 116, and when the battery compartment cover 116 is in the closed state, the first operation member 340 is connected with the second operation member 293 through a rod-shaped member, so that when the user presses the first operation member 340, the second operation member 293 is pressed to display the power. In some embodiments, the first operation member 340 is elastically connected with the casing 110, so as to facilitate the pressing of the first operation member 340.

[0239] In some embodiments, with reference to Figures 26 to 28 The battery prompt member 1191 can be arranged on the casing 110 to directly display the state information of the battery pack 290 without observing the battery pack 290 through the transparent window. The battery prompt member 1191 can at least display the remaining power information of the battery pack 290, and further can display various fault warning information of the battery pack 290, and the battery prompt member 1191 can use components including but not limited to a remaining power prompt lamp and a display screen to display the information. In some embodiments, the battery prompt member 1191 also has an operation part 1192 such as a button, a key, and a touch screen, and in response to the pressing, clicking or other operation of the operation part 1192 by the user, the battery prompt member 1191 can display the state information such as the remaining power. In some embodiments, the above-mentioned battery prompt member 1191 can be arranged at the rear end of the main body part 111 of the casing 110 and the front side of the holding part, so as to facilitate the user to observe; of course, the battery prompt member 1191 can also be arranged at other positions.

[0240] As shown in Figure 28 , the battery prompter 1191 includes an operation part 1192 and a prompt part 1194 arranged on the casing 110, and further includes a sub-circuit board 1193 arranged in the casing 110, which can be electrically connected with the operation part 1192 and the prompt part 1194 of the battery prompter 1191 and the main circuit board 181 of the cutting machine 100 described above. When the operation part 1192 is operated by the user, an activation signal will be transmitted to the sub-circuit board 1193, and the sub-circuit board 1193 will obtain the state information such as the remaining power information of the battery pack 290 from the circuit board 181 in response to the signal and trigger the prompt part 1194 to display the corresponding information, for example, light up the corresponding number of prompt lights according to the remaining power or display the corresponding power value, light up a red light or flash to alarm for over-temperature, underflow, low power, etc. The operation part 1192 and the prompt part 1194 can be arranged on the upper part of the rear end of the main body part 111 of the casing 110 and the front side of the main handle 112, and the sub-circuit board 1193 can be arranged on the back of the position where the operation part 1192 and the prompt part 1194 are located. The sub-circuit board 1193 can be electrically connected with the circuit board 181 by a flat cable, which can be attached and fixed to the inner wall of the casing 110.

[0241] Referring to Figure 33 , Figure 34 , for the convenience of users to store or rest during work and for hanging and draining water, the cutting machine 100 further includes a hook assembly 410, by which the cutting machine 100 can be stably hung in a substantially vertical posture at one or more support points, including but not limited to a wall, a box, a cabinet. As shown in Figure 33 , the hook assembly 410 can be arranged on the lower bottom surface or the side surface of the main body part 111 of the casing 110 of the cutting machine 100, for example, on the lower bottom surface of the battery compartment 1111, etc. In other embodiments, the hook assembly 410 can also be arranged near the main handle 112 of the casing 110, including being arranged at the rear end of the main handle 112 and being arranged on the lower bottom surface of the main handle 112, etc. Of course, it is not excluded that the hook assembly 410 can be arranged at other positions on the casing 110 of the cutting machine 100. In some embodiments, the hook assembly 410 is arranged at a higher part of the bottom surface of the casing 110 in the up-down direction; in other embodiments, a storage groove can also be formed inwardly at the position on the casing 110 for mounting the hook assembly 410, and the hook body 411 and the mounting part 412 are arranged in the storage groove, thereby avoiding the influence of the hook assembly 410 on the stability of the cutting machine 100 placed horizontally.

[0242] In some embodiments, the hook assembly 410 can have a storage state and a hanging state, the hook assembly 410 can include a hook body 411 and a mounting member 412, the hook body 411 can be mounted to the housing 110 of the cutting machine 100 through the mounting member 412, the mounting member 412 can be fixedly connected with the housing 110, and the hook body 411 can be rotationally connected with the mounting member 412. In the storage state and the hanging state, the hook body 411 can be connected with the mounting member 412 at different angles, so that the cutting machine 100 can have different postures relative to the hook body 411.

[0243] In some embodiments, the hook body 411 can be flipped by at least 90° in the hanging state relative to the storage state. Figure 33 、 Figure 34 For example, the hook body 411 and the mounting member 412 are attached to the bottom surface of the battery compartment 1111 which is higher than the bottom surface of the housing 110, the rotation axis of the hook body 411 around the mounting member 412 extends substantially parallel to the bottom surface of the battery compartment 1111, for example, in the front-rear direction or the left-right direction, and the plane where the hook body 411 is located when the hook body 411 is in the storage state is substantially parallel to the bottom surface of the battery compartment 1111, and the plane where the hook body 411 is located when the hook body 411 is in the hanging state is flipped by about 90° and is substantially perpendicular to the bottom surface of the battery compartment 1111. When the hook body 411 is in the storage state, the plane where the hook body 411 is located is substantially parallel to the ground, and when the hook body 411 is in the hanging state, the plane where the hook body 411 is located can be substantially parallel to the ground or substantially perpendicular to the ground due to the different directions of the rotation axis. Alternatively, the hook assembly 410 can be arranged at the rear end or the lower bottom of the main handle 112, and the hook body 411 can be flipped by about 90° or 180° when the hook body 411 is in the hanging state. When the hook body 411 is flipped by 180°, the plane where the hook body 411 is located can be substantially parallel to the bottom surface of the housing 110 of the cutting machine 100 when the hook body 411 is in the storage state or the hanging state. In some embodiments, similar to the battery compartment cover 116 described above, the hook assembly 410 can also include a torsional spring or the like to keep the hook body 411 at a preset angle after being flipped.

[0244] It can be understood that the technical solutions described in the above embodiments can be freely combined without contradiction.

[0245] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the above embodiments do not limit the present application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A cutting machine comprising: a housing; a motor having a motor shaft; an output shaft for mounting and driving a saw blade; a transmission assembly for power transmission between the motor shaft and the output shaft; characterized in that the cutting machine further comprises a hook assembly by which the cutting machine is stably hung in a substantially vertical posture at one or more support points.

2. The cutting machine of claim 1, wherein, The hook assembly is arranged on the bottom surface of the housing.

3. The cutting machine of claim 2, wherein, The hook assembly is arranged on a higher portion of the bottom surface of the housing in the vertical direction.

4. The cutting machine of claim 2, wherein, The housing comprises a main body extending in the front-rear direction, inside which a battery compartment is formed, and the hook assembly is arranged on the bottom surface of the battery compartment.

5. The cutting machine of claim 1, wherein, The housing comprises a main handle at the rear of the cutting machine, and the hook assembly is arranged on the bottom surface or rear end of the main handle.

6. The cutting machine of claim 1, wherein, The hook assembly has a storage state and a hanging state, and the hook assembly is rotationally connected with the housing, and the hook assembly is rotated relative to the housing to switch between the storage state and the hanging state.

7. The cutting machine of claim 6, wherein, The hook assembly comprises a hook body and a mounting member, and the mounting member is fixedly connected with the housing, and the hook body is rotationally connected with the mounting member.

8. The cutting machine of claim 7, wherein, The hook body is rotated by at least 90° relative to the mounting member in the hanging state than in the storage state.

9. The cutting machine of claim 7, wherein, In the hanging state, the bottom surface of the housing of the cutting machine is substantially perpendicular to the ground, and the surface on which the hook body is located is substantially perpendicular to the bottom surface of the housing, wherein the bottom surface of the housing is substantially parallel to the ground when the cutting machine is placed horizontally.

10. The cutting machine of claim 7, wherein, In the hanging state, the surface on which the hook body is located is substantially parallel to the bottom surface of the housing.

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