Amphibious handheld power tools

Abstract

The present application discloses an amphibious handheld electric tool, comprising: a body shell, the body shell has a main body inflation port, and the main body inflation port is installed with a main body inflation component; a head shell, which is sealed and fixedly connected to the body shell; a power source, which is encapsulated in the body shell and has an output shaft extending toward the head shell; a working shaft head, which is installed in the head shell, and both ends of the working shaft head extend out of the head shell, one end is a driving end, and the other end is a working end; an impact turn block, which is transmission-connected to the output shaft of the power source and the driving end of the working shaft head. The electric tool of the present application can be used amphibiously, and can be used for deep-water operations after being inflated.

Description

Technical Field

[0001] The invention relates to the field of electric tools, and in particular to an amphibious handheld electric tool. Background Art

[0002] Handheld power tools are a type of power tools that are more common in production and life, and are used for different needs in production and life. The structure of the most common handheld power tools on the market generally includes two parts: the body and the head. The power source is encapsulated in the body shell, and the working shaft is installed on the head. After the head and the body are assembled, the power source outputs power to the working shaft to perform operations, such as electric hole turning machines, electric screwdrivers, electric wrenches, electric threading machines and other assembly power tools. However, most handheld power tools can only meet the needs of land use and cannot be used for underwater operations, especially deep-water operations. Summary of the invention

[0003] The present application provides an amphibious handheld electric tool, which can be used for operations on land, in shallow water or in deep water.

[0004] An amphibious handheld electric tool, comprising:

[0005] A fuselage shell, the fuselage shell is provided with a main body inflation port, and the main body inflation port is equipped with a main body inflation component;

[0006] The nose shell is sealed and fixedly connected to the fuselage shell;

[0007] a power source enclosed in the body housing and having an output shaft extending toward the head housing;

[0008] A working shaft head is installed in the machine head housing, and both ends of the working shaft head extend out of the machine head housing, one end is a driving end, and the other end is a working end;

[0009] The impact block drives the output shaft of the power source and the driving end of the working shaft head.

[0010] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0011] Optionally, a sleeve fixedly connected to the output shaft is mounted on the output shaft of the power source, and the impact block is rotatably mounted on the end of the output shaft; when the tool is started, the sleeve and the impact block sequentially have a first state of relative rotation and a second state of linkage.

[0012] Optionally, the impact block has a first connecting portion connected to the output shaft, a second connecting portion connected to the working shaft head, and at least two radially extending extension ears; the sleeve has a working end face facing the impact block, and the working end face has a limit stop block along the circumferential direction that cooperates with the extension ears to switch the sleeve and the impact block from a first state to a second state.

[0013] Optionally, a limit stop corresponding to the number of extended ears is set on the working end face, the circumferential area between two adjacent limit stops is a relative rotation zone, the extended ears extend into the relative rotation zone accordingly, and the central angle A2 or circumferential width D of the extended ears is smaller than the central angle A1 of the relative rotation zone; in the first state, there is a circumferential gap between the limit stop and the extension ear, and in the second state, the limit stop and the extension ear are abutted against each other.

[0014] Optionally, the limit stopper and the extension ear have facing linkage surfaces, and in the second state, the linkage surface of the limit stopper and the linkage surface of the extension ear are fitted and abutted against each other.

[0015] Optionally, each of the limit stops and each of the connecting ears has two linkage surfaces; the limit stops and the extending ears can switch between the first state and the second state when the output shaft is running forward or reversely.

[0016] Optionally, the limit stop block is a block with a fan-shaped radial cross-section, and the two side surfaces intersecting with the working end surface are both linkage surfaces; the connecting ear is an extension portion with a rectangular radial cross-section, the bottom surface of the extension ear is flush with the bottom surface of the relatively rotatable area and can slide towards each other, and the two opposite side surfaces of the connecting ear are both linkage surfaces.

[0017] Optionally, the first connecting part is a sleeve structure, which is sleeved on the end of the output shaft; the extension ear extends radially outward from the outer circumferential surface of the sleeve structure; the second connecting part is a polygonal head, and the driving end face of the working shaft head has a polygonal hole adapted to the polygonal head.

[0018] Optionally, the body shell includes:

[0019] A first half shell and a second half shell, wherein the first half shell and the second half shell are butted together to form a main body packaging portion along the X direction and a gripping portion along the Y direction, one end of the main body packaging portion is closed and has the main body inflation port, and the other end is open and sealed and fixedly connected to the head housing;

[0020] A base, packaged at the bottom of the grip portion;

[0021] And a shell sealing ring with a three-dimensional structure and formed in one piece, wherein the shell sealing ring is correspondingly located between the first half shell and the second half shell, between the active packaging part and the head shell, and between the gripping part and the base.

[0022] Optionally, the head housing includes:

[0023] A head body is sealed and connected to the body shell, and the head body has an axial hole for the working shaft head to pass through;

[0024] A first sealing bearing, a second sealing bearing and a first sealing assembly are sleeved on the working shaft head and rotatably matched with the working shaft head. The first sealing bearing is located on the inner end face side of the shell and is axially limited in the through hole. The second sealing bearing is located on the outer end face side of the shell and is axially movable in the shaft hole. The first sealing assembly is located between the first sealing bearing and the second sealing bearing. The first sealing assembly is an axially deformable elastic structure to adapt to the displacement of the second sealing bearing.

[0025] Optionally, the machine head housing further comprises a second sealing assembly which is sleeved on the working shaft head and rotatably matched with the working shaft head, and the second sealing assembly is located between the first sealing assembly and the second sealing bearing;

[0026] A second step is provided in the axial hole for limiting the axial movement of the second sealing component toward the outer end surface of the head body;

[0027] The working shaft head and the outer side of the head body are provided with a shaft ring for limiting the displacement limit of the second sealing bearing.

[0028] Optionally, the inner end surface side of the head body has an annular assembly groove that is butted against the body shell and a sealing ring accommodating groove that is sunken relative to the bottom surface of the annular assembly groove.

[0029] Optionally, the first sealing component includes:

[0030] A first sealing ring, which is sleeved on the working shaft head and one end of which abuts against the first sealing bearing;

[0031] A second sealing ring is sleeved on the working shaft head and one end of which abuts against the second sealing bearing or the second sealing assembly; the first sealing ring and the second sealing ring are abutted against each other at one end facing each other and a radial gap is left between the abutting point and the outer surface of the working shaft head to form a cavity;

[0032] A spring is sleeved on the outer circumference of the first sealing ring, and one end of the spring abuts against the back side of the abutting connection between the first sealing ring and the second sealing ring.

[0033] Optionally, the inner ring surface of the first sealing ring is tightly against the surface of the working shaft head and rotatably fits therewith; a radial gap is provided between the inner ring surface of the second sealing ring and the surface of the working shaft head, and the radial gap forms an axial channel, and the axial channel is connected to the cavity.

[0034] Optionally, the first sealing assembly further comprises a first ring sleeve which encapsulates the first sealing ring, the second sealing ring and the spring into a whole first sealing assembly.

[0035] Optionally, the spring is mounted on the first sealing ring through a first spring seat and a second spring seat.

[0036] Optionally, the second sealing component includes:

[0037] A third sealing ring, the inner ring surface of which is in close contact with the surface of the working shaft head and is rotationally fitted therewith;

[0038] The second ring sleeve is sleeved outside the third sealing ring. The second ring sleeve has an annular edge which is radially inward and has a radial gap with the surface of the working shaft head at one end facing the second sealing bearing. One side of the annular edge abuts the third sealing ring and the other side abuts the second sealing bearing.

[0039] Optionally, a control mechanism is also included; the control mechanism includes:

[0040] A controller, the power source is connected to the controller via a wire, and the controller at least has a steering switch lever and a main switch connecting column;

[0041] The main switch button includes a switch shaft that penetrates the body shell and is detachably connected to the main switch connecting column, and a pressing operation part located outside the body shell for operating the switch shaft, wherein the switch shaft is sealed at the connection with the body shell;

[0042] The steering switch button comprises a pair of pressing shafts which are installed through the fuselage shell in opposite directions and are sealed with the fuselage shell. The pair of pressing shafts are used to drive the steering switch lever to switch between the forward rotation position and the reverse rotation position and lock it.

[0043] Optionally, the controller further comprises a gear switching output terminal for limiting a corresponding gear speed limit, and a gear switching button electrically connected to the gear switching output terminal is sealed and mounted on the fuselage shell.

[0044] Optionally, it further includes a lighting mechanism, wherein the lighting mechanism includes:

[0045] At least one light emitting device, the light emitting device is connected to the controller via a wire and is linked and controlled by the main switch button;

[0046] Corresponding to the lampshade arranged on the light-emitting device, the head housing is provided with a lampshade receiving hole for the lampshade to pass through, and the lampshade is sealed and connected to the lampshade receiving hole.

[0047] Optionally, it further includes a pressure-leveling and endurance-supporting mechanism connected to the interior of the fuselage shell through the main body inflatable assembly; the pressure-leveling and endurance-supporting mechanism includes:

[0048] At least one pressure-scaling gas chamber, the pressure-scaling gas chamber having a piston that slides along the inner wall of the pressure-scaling gas chamber as the pressure difference between the inside and outside of the pressure-scaling gas chamber changes;

[0049] An air guide tube, one end of which is connected to the interior of the flat-pressure air chamber, and the other end of which is connected to the interior of the fuselage shell through a main inflatable component on the fuselage shell;

[0050] The gas cylinder is connected with the interior of the flat-pressure gas chamber through an air filling pipe.

[0051] Optionally, the flat pressure endurance mechanism further includes:

[0052] Life-saving air bag box;

[0053] The life-saving airbag is enclosed in the life-saving airbag box, and the life-saving airbag is connected with the gas cylinder through an inflation tube.

[0054] Optionally, a quick-release assembly that cooperates with each other is provided between the fuselage shell and the flat-pressure endurance mechanism.

[0055] Preferably, the quick-release assembly comprises:

[0056] A Picatinny rail, fixedly mounted on the fuselage shell;

[0057] The slider is fixedly mounted on the flat pressure endurance mechanism and is compatible with the Picatinny rail.

[0058] Optionally, it also includes a battery pack located outside the fuselage shell and supplying power to the power source;

[0059] The battery pack comprises:

[0060] A battery casing, wherein the battery casing is provided with a battery charging port, an automatic pressure relief port and a safety opening;

[0061] A battery assembly, encapsulated in the battery housing;

[0062] A charge and discharge plug connector assembly is sealed and mounted on the battery housing, a portion of the charge and discharge plug connector assembly extends into the battery housing and is connected to the battery assembly, and a portion of the charge and discharge plug connector assembly extends out of the battery housing and is connected to the power source;

[0063] And a battery charging assembly, an automatic pressure relief assembly and a safety explosion-proof valve assembly are correspondingly installed at the battery charging port, the automatic pressure relief port and the safety opening.

[0064] Optionally, the explosion-proof valve assembly includes an explosion-proof valve body installed in the safety opening and an explosion-proof pressure piece for closing the safety opening, and the explosion-proof valve body can push out the explosion-proof pressure piece under the impact of high air pressure in the battery casing.

[0065] Optionally, there is a snap-fitting part between the battery shell and the body shell, which can connect and lock the battery pack to the body shell.

[0066] Optionally, the charging and discharging plug connector assembly includes a charging and discharging plug connector, which is installed on the top surface of the battery housing and the connection is sealed by vulcanized rubber.

[0067] Optionally, a power plug connector is integrated at the bottom of the body shell and the connection is sealed with vulcanized rubber;

[0068] Optionally, the charging and discharging connector and the power connector are compatible watertight connectors.

[0069] Optionally, the outer surfaces of the body shell, the head shell and the battery shell are all provided with heat dissipation fins.

[0070] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0071] (1) The electric tool of the present application is amphibious and can be used for deep-water operations after being inflated;

[0072] (2) The battery pack of the electric tool of the present application is waterproof and explosion-proof and can be used for deep-water operations after being inflated;

[0073] (3) The pressure-equalizing mechanism of the present application can maintain the air pressure in the tool body stable underwater, and can also be directly inflated underwater to sustain navigation;

[0074] (4) The electric tool of the present application can be operated by a single person, is small in size, easy to carry, and is suitable for water environments, sandy dust environments, etc.;

[0075] (5) The battery of the electric tool of the present application can be replaced underwater to improve the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 and Figure 2 Schematic diagram of the overall structure of the handheld power tool of this application at different angles;

[0077] Figure 3 for Figure 1 Figure 1 shows the overall structure of the tool body;

[0078] Figure 4 for Figure 1 Schematic diagram of the exploded tool body;

[0079] Figure 5 for Figure 3 An exploded schematic diagram of the middle fuselage shell and the nose shell;

[0080] Figure 6 for Figure 5Structural diagram of the bottom angle of the middle base;

[0081] Figure 7 for Figure 5 A cross-sectional view of the middle machine head housing;

[0082] Figure 8 for Figure 5 Schematic diagram of the exploded structure of the middle machine head housing and enlarged diagram of some components;

[0083] Fig. 9 It is an exploded schematic diagram of the power source and impact block portion of the tool body;

[0084] Fig.10 It is a schematic diagram of the connection between the impact rotating block and the power source;

[0085] Fig.11 and Fig.12 Schematic diagrams showing different angles of the component structure encapsulated in the fuselage shell;

[0086] Fig.13 and Fig.14 for Figure 1 Overall schematic diagram of the battery pack at different angles;

[0087] Fig.15 for Figure 1 Schematic diagram of the battery pack;

[0088] Fig.16 for Fig.13 and Fig.15 A cross-sectional view of the explosion-proof component;

[0089] Fig.17 and Fig.18 for Figure 1 Overall schematic diagram of the medium-pressure endurance device at different angles;

[0090] Fig.19 for Fig.17 and Fig.18 Cross-sectional view of the intermediate pressure gas chamber.

[0091] The reference numerals shown in the figures are as follows:

[0092] 10. Power tools;

[0093] 11. Body shell: 1101. first half shell, 1102. second half shell, 1103. base, 1104. shell sealing ring, 1105. power plug connector, 1106. main body inflation port, 1107. connection ear;

[0094] 12. Head housing: 1201. first sealed bearing, 1202. first spring seat, 1203. first sealing ring, 1204. second sealing ring, 1205. buffer spring, 1206. second spring seat, 1207. first ring sleeve, 1208. third sealing ring, 1209. second ring sleeve, 1210. second sealed bearing, 1211. head body, 1212. retaining ring, 1213. cavity, 1214. annular assembly groove, 1215. sealing ring receiving groove, 1216. lampshade receiving hole, 1217. axial channel, 1218. first step, 1219. second step;

[0095] 13. Working shaft head;

[0096] 14. Picatinny rail;

[0097] 15. Power source:

[0098] Transmission mechanism: 1501, sun gear, 1502, external gear fixing frame, 1503, external gear ring, 1504, bearing, 1505, planet carrier, 1506, planet gear, 1507, sleeve, 1508, limit stopper, 1509, relative rotation zone, 1510, output shaft of planetary reducer, 1511, sleeve axial limiter, 1508a, linkage surface of limit stopper;

[0099] 1512. Motor;

[0100] 16. Control mechanism: 1601. Controller (1601a. ​​Main switch connecting column, 1602b. Steering switch lever, 1601c. Gear switch output terminal), 1602. Main switch button (1602a. Pressing operation part, 1602b. Switch shaft, 1602c. Switch shaft sealing ring, 1602d. Switch shaft ring, 1602e. Switch spring), 1603. Steering switch button (1603a. First pressing shaft, 1603b. Second pressing shaft), 1604. Gear switch button;

[0101] 17. Main body inflation assembly: 1701. first air valve cover, 1702. first air valve, 1703. first air valve sealing ring;

[0102] 18. Illumination mechanism: 1801. first light emitting device, 1802. first lampshade;

[0103] 19. Impact rotating block, 1901. First connecting portion, 1902. Second connecting portion, 1903. Extension ear, 1903a. Linkage surface of the extension ear;

[0104] 20. Battery pack;

[0105] 21. Charging and discharging plug connector assembly: 2101. plug connector installation port, 2102. plug connector fixing nut, 2103. charging and discharging plug connector;

[0106] 22. Manual pressure relief assembly: 2201. Manual pressure relief port; 2202. Pressure relief screw fixing nut; 2203. Pressure relief screw sealing ring; 2204. Pressure relief screw;

[0107] 23. Battery housing: 2301. Battery upper cover, 2302. Battery lower cover, 2303. Battery sealing ring, 2304. Battery sealing ring receiving groove, 2305. Heat dissipation fins;

[0108] 24. Explosion-proof components: 2401. Explosion-proof valve sealing ring, 2402. Explosion-proof valve, 2403. Annular gasket, 2404. Explosion-proof pressure piece, 2405. Explosion-proof pressure piece fixing screw, 2406. Explosion-proof valve limit step, 2407. Safety opening;

[0109] 25. Battery power display assembly: 2501. second light emitting device, 2502. pressing block, 2503. second lampshade, 2504. lampshade sealing ring;

[0110] 26. Buckle assembly: 2601. Buckle fixing seat, 2602. First pull rod, 2603. Second pull rod, 2604. First pin shaft, 2605. Second pin shaft, 2606. Fixed spring washer;

[0111] 27. Battery charging assembly: 2701. Second gas valve cover, 2702. Second gas valve, 2703. Second gas valve sealing ring, 2704. Gas valve fixing nut;

[0112] 28. Automatic pressure relief assembly: 2801. Automatic pressure relief valve; 2802. Automatic pressure relief valve sealing ring;

[0113] 29. Battery assembly: 2901. battery pack; 2902. circuit board;

[0114] 30. Flat pressure endurance device;

[0115] 31. Flat pressing bin body: 3101. Cylinder body, 3102. Piston, 3103. Piston stopper, 3104. Cover;

[0116] 32. air guide tube; 33. first connecting bracket; 34. slider; 35. life-saving airbag box; 36. gas cylinder; 37. second connecting bracket; 38. inflation tube; 39. inflation button. DETAILED DESCRIPTION

[0117] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0118] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0119] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0120] like Figure 1 and Figure 2 As shown, an amphibious handheld power tool includes a tool body 10, and may also include a battery pack 20 and a pressure-equalizing endurance device 30. The battery pack is connected to the bottom of the tool body and is used to supply power to the tool body. The pressure-equalizing endurance device is mounted on the tool body and is used to keep the air pressure in the tool body stable.

[0121] The entire tool body 10 is as follows Figure 3 and Figure 4 As shown, it includes a body shell 11, a head shell 12, a power source 15, a working shaft head 13 and an impact turn block 19. A main body air filling port 1106 is provided on the body shell 11, and a main body air filling assembly 17 is installed at the main body air filling port; the head shell 12 is sealed and fixedly connected to the body shell 11; the power source 15 is encapsulated in the body shell 11, and the power source includes a motor and a transmission mechanism, the input end of the transmission mechanism is connected to the output shaft of the motor, and the output end of the transmission mechanism has an output shaft extending toward the head shell; the working shaft head 13 is installed in the head shell 12, and both ends of the working shaft head 13 extend out of the head shell 12, and the end of the working shaft head extending out of the inner side of the head shell is the driving end, and the end extending out of the outer side of the head shell is the working end; the impact turn block 19 connects the output shaft of the transmission mechanism and the driving end of the working shaft head. The working end of the working shaft head is used for external working parts (such as a rotating head, a screwdriver, a wrench, etc.).

[0122] The motor of the power source outputs power to the working shaft head through the transmission mechanism, and the working shaft head drives the external working part to rotate to perform operations such as turning holes and wrenching. After the body shell 11 and the head shell are encapsulated, a completely sealed closed environment is formed in the shell of the entire tool body to prevent water and other liquids in the external environment from entering the shell and to prevent internal gas from leaking out. It can be used for ordinary underwater operations, and can also be inflated to a preset air pressure value through the inflation port for deep-water operations. The electric tool can be used for both water and land. The working shaft head and the output shaft are connected by an impact block, which is beneficial to sealing on the one hand, and can buffer the vibration caused by the rotation of the motor on the other hand. On the other hand, the impact block can play an impact role when rotating.

[0123] The transmission mechanism 15 is connected to the output shaft of the motor and the working shaft head 13 to output power. As an implementation method of the transmission mechanism, a planetary gear reducer can be used for transmission, such as Fig. 9 As shown, the planetary gear reducer includes a sun gear 1501, an outer gear ring 1503, a planet carrier 1505, a planetary gear 1506 and an output shaft connected to the planet carrier. The planetary gear reducer is installed by fixing the outer gear ring 1502. The sun gear 1501 is fixed to the output shaft of the motor 19 through a sleeve and rotates synchronously with the output shaft of the motor. The output shaft of the motor serves as the input shaft of the planetary reducer, and the shaft connected to the planet carrier serves as the output shaft 1509 of the planetary reducer. The outer gear ring 1503 is fixed to the outer gear fixing frame 1502 through the outer gear fixing frame 1502. Fixed installation, the outer gear fixing frame 1502 is fixedly connected with the motor 1512. The outer gear fixing frame 1502 is a sleeve structure, the bottom surface of the sleeve structure is fixed on the motor, and the bottom surface of the sleeve structure has a motor output shaft avoidance hole. The outer gear ring is embedded in the outer gear fixing frame and is circumferentially limited with the outer gear. Specifically, the outer surface of the outer gear ring is provided with a protruding ear, and the cylinder wall of the outer gear fixing frame has a slot adapted to the protruding ear. After the outer gear ring is embedded in the outer gear fixing frame, its protruding ear is inserted into the slot of the outer gear fixing frame to achieve the fixed installation of the outer gear ring. The planetary gear 1506 is installed on the planetary carrier 1505 through the rotating shaft, and the planetary carrier 1505 extends into the outer gear ring 1503. The planetary gears are meshed with the sun gear and the outer gear ring respectively. The end of the planetary carrier facing the outer gear ring has an axial protruding connection portion, which extends into the outer gear fixing frame and cooperates with the outer gear fixing frame through the bearing 1504.

[0124] The output shaft 1509 of the planetary gear reducer is connected to the working shaft head 13 through the impact block 19. In a preferred embodiment, a sleeve 1507 is sleeved on the output shaft 1510 of the planetary gear reducer and located between the planet carrier 1505 and the impact block 19. The sleeve is fixedly connected to the output shaft 1510 of the planetary gear reducer, that is, it rotates synchronously with the output shaft, and the impact block 19 is rotatably sleeved on the output end of the output shaft 1510 of the planetary gear reducer. When the power tool is started, the sleeve and the impact block have a first state of relative rotation and a second state of linkage in sequence.

[0125] When the motor starts, the sleeve is driven to rotate first through the transmission mechanism. The sleeve first accelerates its rotation within a certain range, and then drives the impact block to rotate synchronously. The impact force brought by the instantaneous conversion between the first state and the second state makes the working shaft head have impact force at the moment of starting, thereby increasing the torque force when the equipment starts.

[0126] An implementation method for realizing "a first state of relative rotation and a second state of linkage between the sleeve and the impact block when the tool is started", the impact block is provided with at least two radially extending extension ears; the sleeve has a working end face facing the impact block, the working end face is perpendicular to the axis of the output shaft, and the working end face has limit blocks matched with the number of extension ears; the first state and the second state are sequentially carried out and switched between the sleeve and the impact block through the cooperation of the limit blocks and the extension ears.

[0127] Specifically, the cooperation mode between the impact block and the transmission mechanism is as follows: Fig.10 As shown, the impact block 19 includes a first connection portion 1901, a second connection portion 1902 and two radially extending and symmetrically distributed extension ears 1903, the first connection portion is used to connect with the output shaft 1510 of the planetary gear reducer, the second connection portion is used to connect with the working shaft head 13, the first connection portion and the second connection portion are coaxial, and the extension ears extend radially outward from the outer surface of the first connection portion. Two limit blocks 1508 are arranged circumferentially on the working end surface of the sleeve, the area between adjacent limit gears is a relative rotation area 1509, each extension ear 1903 extends into a relative rotation area 1509, and the central angle A2 or circumferential width D of the extension ear is smaller than the central angle A1 of the relative rotation area; in the first state, there is a circumferential gap between the limit block 1508 and the extension ear 1903, and in the second state, the limit block 1508 and the extension ear 1903 are in abutment with each other.

[0128] There are facing linkage surfaces between the limit block and the extension ear. In the second state, the linkage surface of the limit block and the linkage surface of the extension ear are in contact with each other. To meet the requirements of forward and reverse rotation of the motor, the two side surfaces of the extension ear and the limit block along the axial direction of the output shaft are linkage surfaces, and the conversion from the first state to the second turntable as described above can be achieved in both forward and reverse rotation of the motor.

[0129] In one embodiment, the limit stopper is a block with a fan-shaped radial cross section, symmetrically distributed on both sides of the output shaft, and the fan-shaped block has two side surfaces intersecting with the working end surface of the sleeve, and the two side surfaces are both linkage surfaces 1508a of the limit stopper; the extension ear 1903 is roughly a rectangular block with a rectangular radial cross section, and the bottom surface of the rectangular block is a relatively rotating sliding surface, flat against the working end surface of the sleeve, and the two opposite side surfaces of the rectangular block are both linkage surfaces 1903a of the extension ear. At this time, the circumferential width D of the connecting ear is smaller than the central angle A1 of the relative rotation zone. In the first state, the bottom surface of the extension ear 1903 slides with the working surface of the relative rotation zone 1509, and there is a circumferential gap between the extension ear and the limit stopper. In the second state, one of the linkage surfaces of the extension ear 1903 is in contact with one of the linkage surfaces of the limit stopper 1508 (for example, flat against each other).

[0130] The two extension ears can be axially symmetrically distributed, and correspondingly, the two limit blocks can also be axially symmetrically distributed. The limit block first accelerates and rotates a certain space with the output shaft of the planetary gear reducer (the first state). At this time, since the impact block and the output shaft are rotatably matched, they will not rotate synchronously with the output shaft; after the limit block abuts against the extension ear, it drives the impact block to rotate synchronously (the second state). At the moment when the limit block contacts the extension ear, the impact force brought by the static extension ear can increase the torque when the equipment starts.

[0131] Specifically, the center of the bottom of the sleeve 1507 is sleeved on the output shaft 1509 of the planetary gear reducer and fixedly connected to the output shaft. The barrel of the sleeve extends toward the side where the planet carrier is located. A sleeve axial stopper 1510 is mounted on the output shaft between the sleeve and the planet carrier. One end of the stopper abuts against the planet carrier, and the other end extends into the barrel of the sleeve and abuts against the bottom of the barrel, supporting the sleeve axially. A spring can be selected as a specific implementation of the sleeve axial stopper.

[0132] The first connection part 1901 of the impact block is a sleeve structure, which is sleeved on the end of the output shaft 1509 of the planetary gear reducer; the extension ear 1903 extends radially from the outer peripheral surface of the sleeve structure; the second connection part 1902 is a polygonal head coaxial with the sleeve structure, and the driving end face of the corresponding working shaft head 13 has a polygonal hole adapted to the polygonal head, such as Fig.10 The embodiment shown is a hexagonal head, and the drive end face of the corresponding working shaft head has a hexagonal hole.

[0133] After the transmission mechanism connects the motor with the working shaft head, the output shaft of the motor, the output shaft of the planetary gear reducer and the working shaft head are located on the same axis.

[0134] The body shell 11 is used to seal and encapsulate the main parts of the power tool. As the basic requirement of the body shell, it must be easy to package and seal. As a preferred embodiment of the body shell, Figure 5 As shown, the body shell 11 includes a first half shell 1101, a second half shell 1102, a base 1103 and a shell sealing ring 1104. The first half shell and the second half shell are of a basically symmetrical structure. The first half shell and the second half shell are butt-connected to form a main body packaging part A along the X direction and a gripping part B along the Y direction. The axis of the main body packaging part and the axis of the gripping part intersect vertically and horizontally. One axial end of the main body packaging part A is closed and the other end is open. A main body inflation port 1106 is provided on the end face of the closed end for installing an inflation component 17. The port at the open end is sealed and connected to the head object. The head shell constitutes the head sealing assembly of the tool body. The motor and the transmission mechanism are encapsulated in the main body packaging part A. The bottom of the gripping part B is sealed and connected to the base 1103.

[0135] The housing seal ring 1104 is located between the first half shell 1101 and the second half shell 1102, between the main body packaging part A and the head seal assembly 12, and between the grip part B and the base. The housing seal ring is an integrated seal ring with a three-dimensional structure, specifically, including a first annular part matching the shape of the base, a second annular part matching the head housing, and a frame part matching the outer contour shape of the first half shell and the second half shell. The housing seal ring is installed between the mating parts and then fixed by bolts (such as M4 bolts) to achieve sealing at each mating connection.

[0136] The base 1103 closes the bottom opening of the grip portion. Figure 6 As shown, the base 1103 is also integrated with a power plug connector 1105. The power plug connector 1105 is a plug connector that can be directly plugged in and out underwater, such as a vulcanized plug connector. After the power plug connector is fixed to the base 1103, it is sealed as a whole by a sealant such as a vulcanized rubber. The power plug connector is connected to the motor and the external battery pack, and can be directly plugged in and out underwater.

[0137] The main body inflation port 1106 of the fuselage shell is installed with the main body inflation component 17, which can be installed in a conventional manner using an inflation nozzle. In a specific embodiment, Figure 4 As shown, the main body inflation component 17 includes a first air nozzle 1702, a first air nozzle cover 1701 and a first air nozzle sealing ring 1703. The first air nozzle 1702 is conventionally installed at the main body inflation port 1106 and the first air nozzle sealing ring 1703 seals the connection between the air nozzle and the inflation port. The first air nozzle cover 1701 is sleeved on the outside of the air nozzle end and cooperates with the thread between the air nozzle. Unscrew the air nozzle cover and inflate the shell. After inflation is completed, tighten the air nozzle cover.

[0138] The head housing 12 cooperates with the opening end of the main body packaging part A of the body housing 11 to form a head sealing assembly of the tool body. An embodiment of the head housing 12 has a structure as shown in FIG. Figure 7 and Figure 8 As shown, it includes a head body 1211, and the head body 1211 has an axial hole for the working shaft head 13 to pass through. The working shaft head 13 is connected to the axial hole through a first sealing bearing and a second sealing bearing. The first sealing bearing 1201 is located on the inner end face side of the head body 1211, and the second sealing bearing 1210 is located on the outer end face side of the head body 1211. The sealing bearing realizes the connection between the working shaft head and the shell while also realizing the sealing between the working shaft head and the head body. The first sealing bearing and the second sealing bearing respectively realize two seals at the two end faces. The first sealing component and the second sealing component are arranged in the space between the first sealing bearing 1201 and the second sealing bearing 1210. The first sealing bearing, the first sealing component, the second sealing component and the second sealing bearing are all located in the axial hole and are mounted on the working shaft head. From the inner end face side to the outer end face side of the head body, the first sealing bearing, the first sealing component, the second sealing component and the second sealing bearing are sequentially abutted and connected.

[0139] Between the working shaft head and the axial hole of the head body, from outside to inside, the second sealing bearing 1210 forms a first seal, the second sealing assembly forms a second seal, the first sealing assembly forms a third seal, and the first sealing bearing 1201201 forms a fourth seal. The multi-stage seal enhances the sealing and waterproof performance of the working shaft head and the shell.

[0140] The first sealing bearing is axially limited in the axial hole of the head body, and the second sealing bearing 1210 can move axially within a certain range to adapt to the vibration of the working shaft head during operation. The first sealing component adopts an axially deformable elastic part, and the axial deformation space of the first sealing component is to adapt to the axial displacement of the second sealing bearing 10.

[0141] In one embodiment of the axial limitation of the first sealed bearing, a first step 1218 is arranged in the axial hole of the head body, the driving end of the working shaft head has a shoulder, and one of the two axial end faces of the first sealed bearing 1201 abuts against the first step and the other abuts against the shoulder 1216. The first step in the axial hole and the shoulder of the working shaft head cooperate with each other to limit the axial direction of the first sealed bearing in the axial hole.

[0142] A second step 1219 is also provided in the shaft hole of the head body, and a part of the end face of the second sealing component facing the outside of the head body abuts against the second step. The second step is used to limit the axial movement of the second sealing component toward the outer end face of the head body. A shaft ring 1212 is provided on the working shaft head and located outside the shell. The shaft ring 1212 limits the extreme position of the axial displacement of the second sealing bearing to the outside. There is a small axial gap between the shaft ring 1212 and the outer end face of the shaft hole, which cooperates with the axial deformation of the first sealing component to adapt to the small axial displacement of the second sealing bearing when the working shaft head is working, so as to achieve shock absorption. The shaft ring can adopt a retaining spring.

[0143] An implementation manner of the first sealing assembly includes a first sealing ring 1203 , a second sealing ring 1204 , a buffer spring 1205 , a first spring seat 1202 and a second spring seat 1206 .

[0144] As the necessary components of the first sealing assembly, it includes a first sealing ring 1203, a second sealing ring 1204 and a buffer spring 1205. The first sealing ring 1203 and the second sealing ring 1204 are both mounted on the working shaft head and arranged along the axial direction of the working shaft head. The first sealing ring 1203 and the second sealing ring 1204 are abutted at one end thereof facing each other. There is a radial gap between the abutting connection between the first sealing ring and the second sealing ring and the outer surface of the working shaft head, and the radial gap forms a cavity 1213. The other end of the first sealing ring abuts against the first sealing bearing 1201, and the other end of the second sealing ring abuts against the second sealing assembly. The buffer spring is mounted on the first sealing ring and abuts against the back side of the abutting connection between the first sealing ring and the second sealing ring.

[0145] The inner ring surface of the first sealing ring 1203 is in close contact with the surface of the working shaft head and can rotate relatively thereto; there is a radial gap between the inner ring surface of the second sealing ring and the surface of the working shaft head, and the radial gap forms an axial channel 1217, which is connected to the cavity 1213.

[0146] The first sealing ring 1203 has an axial protrusion at one end and an annular flange radially outward at the other end. The axial protrusion 1203a of the first sealing ring extends toward the first sealing bearing and abuts against the first sealing bearing; the second sealing ring 1204 has an axial protrusion at one end and an annular flange radially outward at the other end, and the axial protrusion 1205a of the second sealing ring extends toward the second sealing assembly. The first sealing ring 1203 and the second sealing ring 1204 are abutted and connected by their respective annular flanges (1204b and 1205b). At least one of the two facing end faces of the first sealing ring 1203 and the second sealing ring 1204 has a concave structure centered on its corresponding axial hole. The concave structure on the first sealing ring 1203 is recessed toward the axial protrusion of the first sealing ring, and the concave structure of the second sealing ring 1204 is recessed toward the axial protrusion of the second sealing ring. The concave structure forms a cavity as described above when the first sealing ring and the second sealing ring are abutted and connected. In a more preferred embodiment, one end of the first sealing ring 1203 and the second sealing ring 1204 connected to each other are both configured as a flared structure centered on their respective axial holes.

[0147] The first spring seat 1202 and the second spring seat 1206 are preferred embodiments of the first sealing assembly to facilitate the installation of the buffer spring. The first spring seat 1202 is a ring-shaped structure, which is sleeved on the outside of the axial protrusion of the first sealing ring 1203. The first spring seat 1202 and the axial protrusion of the first sealing ring 1203 have a step structure that cooperates with each other to limit the axial position. The first spring seat 1202 has an annular edge along the radial outside at one end close to the first sealing bearing, one side of the annular edge abuts the first sealing bearing and the other side abuts the buffer spring. One end of the buffer spring is sleeved on the outside of the first spring seat 1202 and abuts against the annular edge of the first spring seat 1202; the second spring seat 1206 has an annular edge along the radial inside at one end close to the abutment connection between the first sealing ring and the second sealing ring, one side of the annular edge abuts the side of the annular flange of the first sealing ring and the other side abuts the buffer spring. The other end of the buffer spring extends into the second spring seat 1206 and abuts against the annular edge of the second spring seat 1206.

[0148] The first ring sleeve 1207 is a further preferred embodiment of the first sealing assembly, so as to encapsulate the various parts of the first sealing assembly as a whole. The first ring sleeve 1207 is sleeved on the outside of the annular flanges of the first sealing ring 1203 and the second sealing ring 1204. The first ring sleeve 1207 has a radially inward annular edge at one end facing the second sealing assembly. The first ring sleeve 1207 is supported on the annular flange of the second sealing ring 1204 by the annular edge, so that the various components of the first sealing assembly are encapsulated and connected. The annular flange 1204b of the first sealing ring, the annular flange 1205b of the second sealing ring, the second spring seat 1207 and part of the buffer spring 1206 are all encapsulated in the first ring sleeve 1207.

[0149] The installation method of the first sealing component under the best implementation mode is as follows:

[0150] The second sealing ring 1204 is inserted into the first ring sleeve 1207, and the axial protrusion of the second sealing ring 1204 extends out of the first ring sleeve 1207. The flared end of the first sealing ring 1203 is pressed into the first ring sleeve 1207 and abuts against the second sealing ring 1204. The second spring seat 1206 is pressed on the first sealing ring 1203. The buffer spring 1205 is sleeved on the first sealing ring 1203 and abuts against the second spring seat 1206. The first spring seat 1202 is pressed on the axial protrusion of the first sealing ring 1203. The assembled second sealing assembly is installed as a whole on the working shaft head 13.

[0151] An embodiment of the second sealing assembly includes a third sealing ring 1208 and a second ring sleeve 1209. The third sealing ring 1208 is sleeved on the working shaft head 13. The inner ring surface of the third sealing ring 1208 is in close contact with the outer surface of the rotating shaft and can rotate relatively. The second ring sleeve 1209 is sleeved outside the third sealing ring 1208. A specific embodiment of the second ring sleeve is that the second ring sleeve 1209 has a radially inward ring edge at one end close to the second sealing bearing 1210. The second ring sleeve is supported on the third sealing ring through the ring edge. One side of the ring edge abuts against the end face of the third sealing ring and the other side abuts against the end face of the second sealing bearing. The end face of the second ring sleeve close to the second sealing bearing 1210 also abuts against the second step. There is a radial gap between the ring edge of the second ring sleeve and the working shaft head to ensure that the friction resistance of the working shaft head when rotating is reduced while increasing the sealing effect. The outer ring surface of the second ring sleeve is fitted and connected with the inner wall of the shaft hole.

[0152] The first sealing bearing, the first sealing assembly, the second sealing assembly and the second sealing bearing of the assembled shaft sealing structure are connected in sequence along the axial direction of the shaft, forming four levels of sealing in sequence. The small axial displacement caused by the vibration of the shaft during operation is buffered by the elastic deformation of the first sealing assembly, which has a good shock-absorbing effect.

[0153] The second ring sleeve is an elastic member whose material is softer than that of the third sealing ring; preferably, the second ring sleeve is a rubber ring and the third sealing ring is a PTFE ring. PTFE material has a good axial lubrication effect. The PTFE material ring plays a key role in sealing and rotating lubrication during the tight fit between the PTFE material ring and the rotating shaft, and the rubber ring enhances the sealing and buffering effect. Preferably, the first sealing ring and the second sealing ring are also PTFE rings.

[0154] The head body 1211 needs to satisfy the radial packaging and sealing of the main body packaging part A, the installation of the working shaft head 13, and the axial sealing of the working shaft head. The shape of the head body can be any form that meets the above requirements. In a specific implementation, as Figure 7 and Figure 8 As shown, the head body is an aluminum structure, and the inner end face and the outer end face are both circular structures. The diameter gradually decreases from the inner end face to the outer end face. The outer edge of the inner end face has a radially protruding annular edge, and the center of the inner end face has an axial protrusion protruding relative to the inner end face. The diameter of the axial protrusion is larger than the diameter of the shaft hole, and the first step as mentioned above is formed at the connection point, and the first sealed bearing is located in the axial protrusion.

[0155] The inner end face side of the head body is connected to the open end of the main body packaging part A, and the inner end face is provided with an annular assembly groove 1214 centered on the axial hole. The annular assembly groove is used to match the edge of the open end of the main body packaging part. The bottom of the annular assembly groove has a shell sealing ring accommodating groove 1215 that is sunken relative to the bottom surface of the annular assembly groove. When the head shell and the body shell are assembled, one of the annular parts of the shell sealing ring 1104 is embedded in the shell sealing ring accommodating groove.

[0156] In order to facilitate the operation of the tool body, a control component 16 is also included, through which the start and stop, speed, gear shifting, and steering of the tool body are controlled. An implementation method of the control component is as follows: Figure 4 , Fig.11 and Fig.12 As shown, the control assembly includes a controller 1601, a main switch button 1602, a steering switch button 1603 and a gear switch button 1604. The controller 1601 is encapsulated in the grip portion B of the body shell. The input end of the motor 1512 is connected to the main output end of the controller 1601 through a wire, and the power plug connector 1105 is connected to the input end of the controller 1601 through a wire. The controller has a main switch output end, a steering switch output end and a gear switch output end. The main switch output end has a protruding main switch connection column 1601a, and the steering switch output end has a rotatable steering switch lever 1602b. The steering switch lever can passively switch between a forward rotation position and a reverse rotation position.

[0157] A specific implementation of the main switch button 1602, the main switch button is set at a regular position of the handheld power tool, including a push-operation part 1602a, a switch shaft 1602b and a switch spring 1602e, the push-operation part 1602a is located outside the body shell, the switch shaft 1602b passes through the body shell wall, one end of the switch shaft is fixedly connected to the push-operation part, and the other end is detachably connected to the main switch connecting column 1601a, and the switch shaft sealing ring 1602c is installed on the inner and outer sides of the switch shaft passing through the body shell, so that the switch shaft always maintains a seal between the body shell.

[0158] In a specific embodiment in which the switch shaft 1602b and the main switch connection column 1601a can be detachably connected, the switch shaft and the main switch connection column are coaxially arranged, and the outer peripheral surface of one end of the switch shaft connected to the main switch connection column has a switch shaft ring 1602d protruding from the outer peripheral surface, and a switch spring 1602e is arranged between the switch shaft and the main switch connection column, and the switch spring is sleeved on the main switch connection column and part of the switch shaft, and one end of the switch spring abuts against the spring seat located on the controller, and the other end abuts against the switch shaft ring. Pressing the pressing operation part outside the body shell, the switch shaft moves axially inward, and the main switch connection column is pressed through the transmission of the switch shaft to start the power tool operation, and releasing the pressing operation part, under the reset action of the switch spring, the switch shaft and the main switch connection column are disconnected, and the operation stops. The main switch controls the operation, stop and rotation speed of the equipment.

[0159] A specific implementation of the steering switch button 1603 includes a pair of pressing shafts (a first pressing shaft 1603a and a second pressing shaft 1603b) arranged opposite to each other. The pair of pressing shafts are installed through the body shell and are located above the main switch button. The two pressing shafts are coaxially arranged and perpendicular to the axis of the switch shaft. One end of the two pressing shafts is located outside the fuselage shell for pressing operation, and the other ends of the two pressing shafts are both extended into the fuselage shell and symmetrically located on both sides of the movable end of the steering switch lever 1601b, pushing the first pressing shaft 1603a to rotate the steering switch lever in the direction of the second pressing shaft 1603b, and ejecting the second pressing shaft 1603b, while the second pressing shaft 1603b performs limit locking on the first position of the steering switch lever 1601b; pushing the second pressing shaft 1603b to rotate the steering switch lever in the direction of the first pressing shaft 1603a, and ejecting the first pressing shaft 1603a, while the first pressing shaft 1603a performs limit locking on the second position of the steering switch lever, and the first position and the second position correspond to the positive rotation position and the reverse position respectively. The ends of the two pressing shafts located in the fuselage shell are both provided with a driving block adapted to the steering switch lever, and the driving block also has the limit locking function of the positive rotation position or the reverse position. Sealing rings are arranged on the inside and outside of the connection between the pressing shaft and the body shell, so that the pressing shaft can maintain a seal with the body shell when it is in different positions. The steering switch can realize the forward and reverse rotation of the device.

[0160] An implementation of the gear switch button 1604 is installed on the top of the body shell 11, and is sealed with the body shell by a sealing ring. The gear switch button 1604 is electrically connected to the gear switch output terminal 1601c of the controller through a wire. The speed is adjusted by pressing the main switch button, and the gear switch button can control the limit speed of the corresponding gear.

[0161] The controller also integrates a short-circuit sensor protector and a short-circuit protection switch. When it senses that there is water inside, the self-protection system will automatically start and stop rotating to protect internal components.

[0162] To meet the lighting requirements in the working environment, a lighting assembly 18 is also included, such as Figure 4 , Fig.11 and Fig.12 As shown, the lighting assembly 18 includes at least one first light-emitting device 1801 and a first lampshade 1802 correspondingly covered on the first light-emitting device. The light-emitting device may be an LED or the like. The light-emitting device is connected to the controller 1601 via a wire and is controlled in conjunction with a main switch button 1602. A lampshade accommodating hole 1216 for the lampshade to pass through is provided at a protruding edge where the head body is connected to the body shell, and the connection between the first lampshade and the lampshade accommodating hole of the head body is sealed by a lampshade sealing ring.

[0163] The battery pack 20 is a waterproof and explosion-proof battery pack, such as Fig.13 and Fig.14 As shown, it includes a battery housing 23, a battery assembly 29 and a charge-discharge plug connector assembly 21. The battery housing is a closed shell. The battery assembly 29 is encapsulated in the battery housing 23. The charge-discharge plug connector assembly 21 is installed on the battery housing 23. A part of it is located in the battery housing and connected to the battery assembly, and a part of it is located outside the battery housing for connecting to the power plug connector of the tool body or connecting to the charging device. The charge-discharge plug connector assembly and the battery housing are sealed. The battery housing is provided with an air charging port, an automatic pressure relief port and a safety opening. The air charging port, the automatic pressure relief port and the safety opening are respectively provided at appropriate positions of the battery housing. The air charging port is provided with an air charging assembly 27, the automatic pressure relief port is provided with an automatic pressure relief assembly 28, and the safety opening is provided with an explosion-proof assembly 24. The explosion-proof assembly forms the weakest part of the battery housing.

[0164] The battery housing 23 includes a battery upper cover 2301, a battery lower cover 2302 and a battery sealing ring 2303. The end surfaces where the battery upper cover and the battery lower cover are connected are provided with a battery sealing ring receiving groove 2304 for receiving the battery sealing ring. The battery upper cover is butted against the battery lower cover, and the sealing ring is pressed into the sealing ring receiving groove. Then, the battery upper cover and the battery lower cover are fixedly connected by bolts such as M4 bolts. The inflation component 27 and the automatic pressure relief component 28 are installed on the side wall of the battery lower cover 2302. The inflation component 27 and the automatic pressure relief component 28 are located on the same surface of the lower cover and are installed adjacent to each other. The charge and discharge plug connector component 27 is installed at the center of the top surface of the battery upper cover, and the explosion-proof component 24 is located on the top surface of the battery upper cover.

[0165] The main components of the explosion-proof assembly 24 include an explosion-proof valve body and an explosion-proof pressure piece. The explosion-proof valve body is installed in the safety opening, and the safety opening is closed by the explosion-proof pressure piece. The explosion-proof pressure piece can adopt a sheet structure made of the same material as the battery shell, and its thickness is smaller than the battery shell, forming the weakest point of the battery shell. When the air pressure is normal, the connection between the explosion-proof valve body and the explosion-proof pressure piece is in a sealed state. When the air pressure is abnormal, the explosion-proof valve body pushes the explosion-proof pressure piece outward under the action of the air pressure to safely release the pressure.

[0166] The preferred embodiment of the explosion-proof valve is as follows Fig.15 and Fig.16 As shown, it includes an explosion-proof valve body 2402, an explosion-proof pressure piece 2404, an annular gasket 2403, an explosion-proof valve sealing ring 2401 and an explosion-proof pressure piece fixing screw 2405. The safety opening 2407 is opened on the battery shell, and the explosion-proof valve body 2402 includes a valve seat and a valve core of an integrated structure. The valve seat and the valve core are coaxial cylindrical structures. The diameter of the valve core is smaller than the valve seat. The explosion-proof valve body and the safety opening are coaxially arranged in the safety opening 2407. The inner wall of the safety opening 2407 has a limiting step 2406, which is used to lock the valve body in the safety opening to limit the valve body from falling into the battery. The outer wall of the valve seat is fitted with the inner wall of the safety opening 2407. An explosion-proof valve sealing ring 2401 is arranged between the outer wall of the valve seat and the inner wall of the safety opening. The outer wall of the valve seat has an annular groove for embedding the explosion-proof valve sealing ring 2401, and the sealing ring is partially embedded in the groove. The annular gasket 2403 is sleeved outside the valve core, one axial end face of the annular gasket 2403 abuts against the valve seat, and the other end face is connected to the explosion-proof pressing piece 2404. The explosion-proof pressing piece 2404 has a through hole for the valve core to pass through. The explosion-proof pressing piece 2404 is fixed to the battery shell by the explosion-proof pressing piece fixing screw 2405. The size of the explosion-proof pressing piece at least ensures that the entire safety opening is closed. After assembly, the explosion-proof valve body is locked in the safety opening, the explosion-proof pressing piece is fixed to the battery shell, the valve seat of the explosion-proof valve body is close to the safety opening, the annular gasket is sleeved outside the valve core and abuts against the valve seat and the explosion-proof pressing piece respectively, and the end of the valve core extends into the through hole of the explosion-proof pressing piece.

[0167] In a further preferred embodiment, the diameter of the safety opening 2407 gradually decreases from its outer port to the inner port to form a slight slope, roughly forming an inverted cone hole from the outside to the inside. The cone angle is not easy to be too large. For example, the angle between the side wall of the complete opening and the axis can be within the range of 3 to 10°, which is conducive to better safety pressure relief under abnormal conditions.

[0168] The battery charging assembly 27 can be in the form of a conventional charging nozzle. In a specific embodiment, Fig.15As shown, it includes a second gas nozzle cover 2701, a second gas nozzle 2702, a second gas nozzle sealing ring 2703 and a gas nozzle fixing nut 2704. The second gas nozzle 2702 is fixed to the battery charging port through the gas nozzle fixing nut 2704. The connection between the second gas nozzle and the battery charging port is sealed by the second gas nozzle sealing ring 2703. The second gas nozzle cover 2701 and the second gas nozzle are threadedly matched. When inflating, unscrew the gas nozzle cover, and tighten the gas nozzle cover after inflation is completed.

[0169] The automatic pressure relief assembly 8 itself can adopt a conventional automatic pressure relief valve, which can be a commercially available standard accessory. In a specific implementation, Fig.15 As shown, it includes an automatic pressure relief valve 2801, which is installed at the automatic pressure relief port in a manner known in the art. The connection between the automatic pressure relief valve and the battery casing is sealed by an automatic pressure relief valve sealing ring 2802.

[0170] In a preferred embodiment, the battery pack further includes a manual pressure relief assembly 22, and a manual pressure relief port 2201 is further provided on the battery housing 23. The manual pressure relief assembly is installed at the manual pressure relief port 2201. Fig.15 As shown, it includes a pressure relief screw 2204, a pressure relief screw fixing nut 2202 and a pressure relief screw sealing ring 2203. The pressure relief screw is an ordinary screw, which is fixedly installed on the manual pressure relief port through the fixing nut, and the connection between the screw and the manual pressure relief port is sealed by the pressure relief screw sealing ring. The manual pressure relief component is located on the battery cover, and the manual pressure relief component and the explosion-proof component are distributed around the charge and discharge plug connector component.

[0171] In a preferred embodiment, the battery pack further includes a battery power display component 25, such as Fig.15 As shown, it includes a second light emitting device 2501, a pressing block 2502, a second lampshade 2504 and a lampshade sealing ring 2503. The second light emitting device 2501 is connected to the battery assembly through a wire. The battery shell has a through hole for the light emitting device to be exposed. The second lampshade 2504 is covered on the first light emitting device 2501. The pressing block 2502 is fixed to the outer surface of the battery shell by bolts such as M4 bolts to fix the lampshade. The pressing block has a through hole for the lampshade to pass through. The lampshade and the through hole connection of the battery shell are sealed by the lampshade sealing ring 2504. The light emitting device can be an LED lamp. The battery power display component 5 is located on the side of the battery shell and is located on a different side from the inflation component and the automatic pressure relief component.

[0172] The battery assembly 29 includes a battery pack 2901 and a circuit board 2902. The battery pack and the circuit board are assembled in a conventional manner. The plug connector of the charge and discharge plug connector assembly and the light-emitting device of the battery power display assembly are connected to the circuit board through wires. The circuit board is provided with a short-circuit protection sensor and a short-circuit protection switch. When the sensor senses battery leakage, it will automatically cut off the power supply, thereby protecting the battery from short-circuit damage. The display mode of the battery power can also be set on the circuit board. For example, a green light indicates that the power is greater than or equal to 95%, a yellow light indicates that the battery power is between 30% and 50%, a red light indicates that the battery power is between 10% and 30%, and a flashing red light indicates that the battery power is less than 10%.

[0173] The battery pack can be inflated into the shell through its inflation component, and the inflation component also serves the function of detecting the sealing performance of the entire battery. Changes in the use environment or battery failure may cause changes in the air pressure in the battery shell. When the air pressure in the battery shell increases, the pressure is first released through the automatic pressure relief component to balance the air pressure inside and outside the battery. When the automatic pressure relief valve fails or the pressure relief speed cannot meet the pressure relief requirements, since the explosion-proof component is the weakest point of the entire battery shell, the air pressure will rush out the explosion-proof component from the safety opening to safely release the pressure and prevent the entire battery from exploding. The entire battery shell is in a sealed state, waterproof and explosion-proof, and can be used for amphibious purposes.

[0174] The charging and discharging connectors on the battery pack and the power connectors on the tool body are both connectors that can be directly plugged and unplugged underwater. For example, the connector itself can adopt a vulcanized connector that can be directly plugged and unplugged underwater. After the vulcanized connector is installed on the corresponding shell, the connector connection is sealed with vulcanized rubber to ensure internal sealing. When used for underwater operation bodies, it can be directly plugged and unplugged underwater.

[0175] In one embodiment of the charge and discharge plug connector assembly 21 of the battery pack, it includes a charge and discharge plug connector 2103 and a plug connector fixing nut 2102. A plug connector installation port 2101 is opened on the battery shell. The charge and discharge plug connector 2103 is fixed at the plug connector installation port by the plug connector fixing nut 2102. A portion of the charge and discharge plug connector is located in the battery shell and is connected to the circuit board of the battery assembly through a wire. A portion of the charge and discharge plug connector is exposed outside the battery shell to facilitate connection with a working subject or a charging device.

[0176] In one matching mode of the charging and discharging connector and the power connector, the charging and discharging connector connection surface of the battery pack has a socket, and the power connector connection surface of the tool body has a pin. The bottom of the base of the body shell has a receiving hole, and the pin part of the power connector is located in the receiving hole. A sealing ring is embedded on the inner wall of the receiving hole. After the charging and discharging connector is butt-connected with the power connector, the outer part of the charging and discharging connector and the inner wall of the receiving hole are sealed by the sealing ring.

[0177] The bottom of the base of the body shell is a hollow structure, which is convenient for the installation of the battery pack. The battery pack and the body shell are connected by snaps, and no sealing is required except for the plug connector connection.

[0178] In order to facilitate quick connection between the battery pack and the tool body, a snap assembly 26 is also provided on the battery shell, and a connecting ear 1107 is provided at the bottom of the body shell of the tool body. The connecting ear has a connecting hole, and the battery pack is connected and locked to the tool body through the snap assembly 26.

[0179] The buckle assembly itself can use a conventional locking interface, or it can use Fig.15 The structure shown in the figure includes a snap-on fixing seat 2601, a first pull rod 2602, a second pull rod 2603, a first pin shaft 2604, a second pin shaft 2605 and a fixed spring washer 2606. The snap-on fixing seat 2601 is fixed on the battery housing 23; one end of the second pull rod 2603 is an operating part, and the other end of the second pull rod 2603 is hingedly installed on the snap-on fixing seat 2601 through the first pin shaft 2604, and the end of the second pull rod 2603 hinged to the snap-on fixing seat 2601 has a avoidance hole; one end of the first pull rod 2602 has an extension portion that extends into the avoidance hole and is hingedly connected to the first pull rod 2602 through the second pin shaft 2605, and the other end of the first pull rod 62 is a snap-on portion, and the extension portion of the first pull rod extends into the avoidance hole from the outside of the first pin shaft; one end of the first pin shaft is sleeved with a fixed spring washer 2606 to limit the axial sliding of the first pin shaft.

[0180] The first pull rod can rotate around the second pin shaft to switch between the locked state and the open state; the second pull rod can rotate around the first pin shaft to switch between the unlocked state (corresponding to the open state of the first pull rod) and the locked state (corresponding to the locked state of the first pull rod).

[0181] The pressure-equalizing device 30 is used to maintain the stability of the air pressure in the tool body and the underwater endurance operation. Figures 17 to 19As shown, it includes a pressure-equalizing gas chamber 31, an air guide tube 32, a gas cylinder 36, an air charging tube 38 and an air charging valve. The pressure-equalizing gas chamber 31 is arranged in parallel and connected in series. Each pressure-equalizing gas chamber 31 has a piston that slides along the inner wall of the pressure-equalizing gas chamber as the pressure difference between the inside and outside of the pressure-equalizing gas chamber changes. The two pressure-equalizing gas chambers are connected through the air guide tube 32, and the pressure-equalizing gas chamber and the tool body are also connected through the air guide tube 2. One end of the air guide tube 32 connected to the tool body is connected to one of the pressure-equalizing gas chambers, and the other end is used for underwater operation and is connected to the inside of the tool body shell through the main body air charging component 17. When the electric tool is operating in deep water, the piston moves with the change of the pressure difference between the inside and outside to keep the air pressure inside the tool body stable. The gas cylinder 36 is connected to one of the equalizing gas chambers 31 through an inflation tube (one of the two equalizing gas chambers is connected to the gas cylinder, and the other is connected to the tool body). An equalizing gas chamber inflation valve is provided on the inflation tube. When the operating body needs to continue diving, the equalizing gas chamber inflation valve is directly operated underwater to directly inflate the equalizing gas chamber, and then inflate the tool body, thereby increasing the air pressure in the tool body to meet the needs of continuing diving operations without returning the operating body to the surface for operation.

[0182] In the preferred embodiment of the pressure-equalizing and endurance-supporting mechanism, it also includes a life-saving air bag and a life-saving air bag box 35. The life-saving air bag is encapsulated in the life-saving air bag box 35, and the life-saving air bag is also connected to the gas cylinder 36 through an inflation tube. The inflation tube is provided with an air bag inflation valve. During underwater operation, the life-saving air bag can be inflated through the gas cylinder, and the life-saving air bag pops out, so that the pressure-equalizing and endurance-supporting device drives the operating body to float to the surface together. In an emergency, it can also drive the operator to float to the surface together.

[0183] In one embodiment of the inflation tube and the inflation valve, the inflation tube includes an inflation tube main pipe, a three-way joint, a pressure-scaling air chamber inflation branch pipe and an airbag inflation branch pipe. The three-way joint, the airbag inflation branch pipe and part of the pressure-scaling air chamber inflation branch pipe are all encapsulated in the life-saving airbag box. The air inlet of the three-way joint is connected to the gas cylinder through the inflation main pipe, one of the air outlets of the three-way joint is connected to the pressure-scaling air chamber through the pressure-scaling air chamber inflation branch pipe, and the other outlet of the three-way joint is connected to the airbag through the airbag inflation branch pipe. The pressure-scaling air chamber inflation valve is arranged on the pressure-scaling air chamber inflation branch pipe, and the airbag inflation valve is arranged on the airbag inflation branch pipe. The pressure-scaling air chamber inflation valve and the airbag inflation valve are also encapsulated in the life-saving airbag box. The life-saving airbag box is provided with an inflation button 39. The inflation button includes a pressure-scaling air chamber inflation button corresponding to the pressure-scaling air chamber inflation valve and an airbag inflation button corresponding to the airbag inflation valve.

[0184] One implementation method of the flat pressure gas storage is a cylinder structure, such as Fig.19As shown, it includes a cylinder and a piston, one end of the cylinder 3101 is sealed by a cover, and the other end is open and used to install the piston. The piston 12 is installed in the cylinder 11 in a conventional manner, and a sealing ring is arranged between the outer wall of the piston 3102 and the inner wall of the cylinder 3101, and the sealing ring is partially embedded on the outer wall of the piston. A piston stopper 3103 is arranged at one end of the cylinder where the piston is installed, which is used to limit the axial slippage of the piston. The piston stopper can be a stopper ring sleeved outside the end of the cylinder, and the stopper ring has a radial flange extending toward the inside of the cylinder. The stopper ring is sleeved on the end of the cylinder and fixedly connected to the cylinder, and the inward radial flange can limit the piston from slipping out of the cylinder.

[0185] The sealing cover is sealed and connected to the cylinder body, and the sealing cover is sealed and installed with an inflation tube connecting air nozzle and an air guide tube connecting air nozzle. Both the inflation tube connecting air nozzle and the air guide tube connecting air nozzle can adopt conventional air nozzles and be installed in a conventional manner. The connecting head between the inflation tube air nozzle and the inflation tube 38, and between the air guide tube connecting air nozzle and the connecting head of the air guide tube 32 can be fixed by threads.

[0186] The two equalization air chambers 1 are fixed on the same connecting piece, namely the first connecting bracket 33. The material of the first connecting bracket can be a steel bar. Both ends of the steel bar are bent to form a fixing ring for the equalization air chamber to pass through and be fixedly connected; the life-saving air bag box 35 and the gas cylinder 36 are arranged in parallel and installed on the same connecting piece, namely the second connecting bracket 37. The second connecting bracket can also be made of the same steel bar as the first connecting bracket. One end of the steel bar forms a fixing ring like the first steel bar, and the other end has an extension portion fixedly connected to the life-saving air bag box.

[0187] A quick release assembly is arranged between the body shell of the tool body and the flat pressure endurance mechanism, and the quick release assembly includes a Picatinny rail 14 and a slider 34 adapted thereto. The Picatinny rail 14 is fixed to the top surface of the body shell of the tool body (see Figure 3 ), the slider 34 is fixed on the first bracket and the second bracket of the flat pressure endurance device (see Fig.17 ). The pressure-leveling mechanism cooperates with the Picatinny rail on the tool body to achieve quick disassembly and assembly with the tool body. After the pressure-leveling mechanism is connected to the tool body, the connector of one of the air guide tubes is connected to the inflation valve of the main inflation assembly to achieve mutual communication between the pressure-leveling gas chamber and the tool body.

[0188] When the electric tool of the present application is used for underwater operations, heat will be generated during the operation of the internal power components. Therefore, in a more advantageous embodiment, the outer surface of the body shell and the outer surface of the head body of the body shell are provided with cooling fins, and the cooling fins are made of the same material as the body shell and the head body of the head shell.

[0189] The battery shell can be a rigid shell, and the explosion-proof pressing plate is a rigid pressing plate of the same material as the battery shell; the battery shell is mainly a battery lower cover and the outer wall thereof is also provided with heat dissipation fins 2305.

[0190] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0191] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An amphibious handheld power tool, characterized in that: include: A fuselage shell, the fuselage shell is provided with a main body inflation port, and the main body inflation port is equipped with a main body inflation component; The nose shell is sealed and fixedly connected to the fuselage shell; a power source enclosed in the body housing and having an output shaft extending toward the head housing; A working shaft head is installed in the machine head housing, and both ends of the working shaft head extend out of the machine head housing, one end is a driving end, and the other end is a working end; The impact rotating block is used to drive the output shaft of the power source and the driving end of the working shaft head; The pressure-leveling and endurance-supporting mechanism is connected to the interior of the fuselage shell through the main body inflatable assembly, and the pressure-leveling and endurance-supporting mechanism includes: At least one pressure-scaling gas chamber, the pressure-scaling gas chamber having a piston that slides along the inner wall of the pressure-scaling gas chamber as the pressure difference between the inside and outside of the pressure-scaling gas chamber changes; An air guide tube, one end of which is connected to the interior of the flat-pressure air chamber, and the other end of which is connected to the interior of the fuselage shell through a main inflatable component on the fuselage shell; The gas cylinder is connected with the interior of the flat-pressure gas storehouse through an air filling pipe.

2. The handheld power tool according to claim 1, characterized in that: A sleeve fixedly connected to the output shaft of the power source is mounted on the output shaft, and the impact block is rotatably mounted on the end of the output shaft; when the tool is started, the sleeve and the impact block sequentially have a first state of relative rotation and a second state of linkage.

3. The handheld power tool according to claim 2, characterized in that: The impact block has a first connection portion connected to the output shaft, a second connection portion connected to the working shaft head and at least two radially extending extension ears; the sleeve has a working end face facing the impact block, and the working end face has a limit stop block along the circumferential direction that cooperates with the extension ears to switch the sleeve and the impact block from the first state to the second state.

4. The handheld power tool according to claim 3, characterized in that: A limit stop block corresponding to the number of extended ears is arranged on the working end face, the circumferential area between two adjacent limit stops is a relative rotation zone, the extended ears extend into the relative rotation zone accordingly, the central angle A2 or circumferential width D of the extended ears is smaller than the central angle A1 of the relative rotation zone; in the first state, there is a circumferential gap between the limit stop block and the extended ears, and in the second state, the limit stop block and the extended ears are abutted against each other.

5. The handheld power tool according to claim 4, characterized in that: The limit stopper and the extension ear have linkage surfaces facing each other, and in the second state, the linkage surface of the limit stopper and the linkage surface of the extension ear are fitted and abutted against each other.

6. The handheld power tool according to claim 3, characterized in that: The first connecting part is a sleeve structure, which is sleeved on the end of the output shaft; the extension ear extends radially outward from the outer circumference of the sleeve structure; the second connecting part is a polygonal head, and the driving end face of the working shaft head has a polygonal hole adapted to the polygonal head.

7. The handheld power tool according to any one of claims 1 to 6, characterized in that: The body shell comprises: A first half shell and a second half shell, wherein the first half shell and the second half shell are butted together to form a main body packaging portion along the X direction and a gripping portion along the Y direction, one end of the main body packaging portion is closed and has the main body inflation port, and the other end is open and sealed and fixedly connected to the head housing; A base, packaged at the bottom of the grip portion; as well as The housing sealing ring is a three-dimensional structure and is formed integrally, and the housing sealing ring is correspondingly located between the first half shell and the second half shell, between the active packaging part and the head housing, and between the gripping part and the base.

8. The handheld power tool according to any one of claims 1 to 6, characterized in that: The head housing comprises: A head body is sealed and connected to the body shell, and the head body has an axial hole for the working shaft head to pass through; A first sealing bearing, a second sealing bearing and a first sealing assembly are sleeved on the working shaft head and rotatably matched with the working shaft head. The first sealing bearing is located on the inner end face side of the shell and is axially limited in the shaft hole. The second sealing bearing is located on the outer end face side of the shell and is axially movable in the shaft hole. The first sealing assembly is located between the first sealing bearing and the second sealing bearing. The first sealing assembly is an axially deformable elastic structure to adapt to the displacement of the second sealing bearing.

9. The handheld power tool according to claim 8, characterized in that: The machine head housing further comprises a second sealing assembly which is sleeved on the working shaft head and rotatably matched with the working shaft head, and the second sealing assembly is located between the first sealing assembly and the second sealing bearing; A second step is provided in the axial hole for limiting the axial movement of the second sealing component toward the outer end surface of the head body; The working shaft head and the outer side of the head body are provided with a shaft ring for limiting the displacement limit of the second sealing bearing.

10. The handheld power tool according to claim 8, characterized in that: The inner end surface side of the head body is provided with an annular assembly groove butted with the body shell and a sealing ring accommodating groove sunken relative to the bottom surface of the annular assembly groove.

11. The handheld power tool according to claim 8, characterized in that: The first sealing assembly comprises: A first sealing ring, which is sleeved on the working shaft head and one end of which abuts against the first sealing bearing; A second sealing ring is sleeved on the working shaft head and one end of which abuts against the second sealing bearing or the second sealing assembly; the first sealing ring and the second sealing ring are abutted against each other at one end facing each other and a radial gap is left between the abutting point and the outer surface of the working shaft head to form a cavity; The spring is sleeved on the first sealing ring, and one end of the spring abuts against the back side of the abutting connection between the first sealing ring and the second sealing ring.

12. The handheld power tool according to any one of claims 1 to 6, characterized in that: Also includes a control mechanism; the control mechanism includes: A controller, the power source is connected to the controller via a wire, and the controller at least has a steering switch lever and a main switch connecting column; The main switch button includes a switch shaft that penetrates the body shell and is detachably connected to the main switch connecting column, and a pressing operation part located outside the body shell for operating the switch shaft, wherein the switch shaft is sealed at the connection with the body shell; The steering switch button comprises a pair of pressing shafts which are installed through the fuselage shell in opposite directions and are sealed with the fuselage shell. The pair of pressing shafts are used to drive the steering switch lever to switch between the forward rotation position and the reverse rotation position and lock it.

13. The handheld power tool according to claim 12, characterized in that: Also included is a lighting mechanism, the lighting mechanism comprising: At least one light emitting device, the light emitting device is connected to the controller via a wire and is linked and controlled by the main switch button; Corresponding to the lampshade arranged on the light-emitting device, the head housing is provided with a lampshade receiving hole for the lampshade to pass through, and the lampshade is sealed and connected to the lampshade receiving hole.

14. The handheld power tool according to claim 1, characterized in that: The flat pressure endurance mechanism also includes: Life-saving air bag box; The life-saving airbag is enclosed in the life-saving airbag box, and the life-saving airbag is connected with the gas cylinder through an inflation tube.

15. The handheld power tool according to claim 1, characterized in that: A quick-release assembly that cooperates with each other is arranged between the fuselage shell and the flat-pressure endurance mechanism.

16. The handheld power tool according to claim 15, characterized in that: The quick-release assembly comprises: A Picatinny rail, fixedly mounted on the fuselage shell; The slider is fixedly mounted on the flat pressure endurance mechanism and is compatible with the Picatinny rail.

17. The handheld power tool according to claim 1, characterized in that: Also included is a battery pack located outside the fuselage housing and supplying power to the power source; The battery pack comprises: A battery casing, wherein the battery casing is provided with a battery charging port, an automatic pressure relief port and a safety opening; A battery assembly, encapsulated in the battery housing; A charge and discharge plug connector assembly is sealed and mounted on the battery housing, a portion of the charge and discharge plug connector assembly extends into the battery housing and is connected to the battery assembly, and a portion of the charge and discharge plug connector assembly extends out of the battery housing and is connected to the power source; And a battery charging component, an automatic pressure relief component and a safety explosion-proof valve component are correspondingly installed at the battery charging port, the automatic pressure relief port and the safety opening.

18. The handheld power tool according to claim 17, characterized in that: A snap-fitting piece is provided between the battery shell and the body shell, which can connect and lock the battery pack to the body shell.

19. The handheld power tool according to claim 17, characterized in that: The charging and discharging plug connector assembly comprises a charging and discharging plug connector, which is mounted on the top surface of the battery housing and has a vulcanized rubber vulcanized seal at the connection; The bottom of the body shell is integrated with a power plug connector and the connection is sealed with vulcanized rubber; The charging and discharging plug connector and the power plug connector are compatible watertight plug connectors.

20. The handheld power tool according to claim 17, wherein: The outer surfaces of the body shell, the head shell and the battery shell are all provided with heat dissipation fins.

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