CN115178796B

CN115178796B - Amphibious electric reciprocating saw

Info

Publication number: CN115178796B
Application number: CN202210523356.8A
Authority: CN
Inventors: 吴繁; 朱杭琦; 魏华; 黄燕; 夏胤
Original assignee: Hangzhou Kona Special Equipment Co ltd
Current assignee: Hangzhou Kona Special Equipment Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2023-05-09
Anticipated expiration: 2042-05-13
Also published as: CN115178796A

Abstract

The application discloses an amphibious electric reciprocating saw, which comprises a power mechanism, a transmission mechanism and an action mechanism; the inside of the reciprocating saw is provided with a first sealing chamber and a second sealing chamber which are mutually independent and are in sealing butt joint, and the first sealing chamber is a sealing chamber sealed by positive pressure; the power mechanism is arranged in the first sealing chamber; the transmission mechanism comprises a first transmission part and a second transmission part connected with the action mechanism, wherein the first transmission part comprises a gear set, and the gear set at least comprises according to the transmission relation: the driving gear is positioned in the first sealing chamber and is fixedly connected with a main shaft of the power mechanism; and the output gear is positioned at the final stage, is arranged in the second sealing chamber, is also fixedly provided with an output shaft penetrating out of the wall of the second sealing chamber, is linked with the second transmission part through the output shaft, and is in rotary sealing fit with the wall of the second sealing chamber. The electric reciprocating saw has good sealing effect, can be used for amphibious and is especially suitable for deepwater operation.

Description

Amphibious electric reciprocating saw

Technical Field

The application relates to the field of electric tools, in particular to an amphibious electric reciprocating saw.

Background

An electric reciprocating saw is one of common electric tools, and is an electric tool driven by a motor and used for sawing through a saw blade in reciprocating motion, and can be used for sawing metal plates, pipes, profiles or cutting bevel holes on steel pipes, and also can be used for cutting cables or other nonmetallic materials.

The common electric reciprocating saw comprises a shell, a power mechanism, a transmission mechanism, an actuating mechanism, a switch and other components, wherein the power mechanism is generally a motor and comprises a direct current motor or an alternating current motor, the transmission mechanism converts the rotation of the motor into the reciprocating motion of the actuating mechanism, a saw blade is loaded on the actuating mechanism through a saw blade clamp, and the motor drives the actuating mechanism to reciprocate through the transmission mechanism, so that the saw blade is driven to reciprocate.

For example, chinese patent publication No. CN 108971628B discloses an electric tool, which includes a rotary wheel driven to rotate around a central axis thereof, and an operating member for carrying a tool of the electric tool, wherein the rotary wheel driven to rotate around the central axis is provided with an eccentric pin, and the eccentric pin cooperates with a transmission hole on the operating member to drive the operating member to reciprocate linearly.

However, conventional electric reciprocating saws cannot be used underwater, and in particular, cannot be used in deep water.

Disclosure of Invention

The application provides an electric reciprocating saw which can be used in waterways and particularly can be used for deepwater operation.

An amphibious electric reciprocating saw comprises a power mechanism, a transmission mechanism and an action mechanism; the inside of the reciprocating saw is provided with a first sealing chamber and a second sealing chamber which are mutually independent and are in sealing butt joint, and the first sealing chamber is a sealing chamber sealed by positive pressure;

the power mechanism is arranged in the first sealing chamber; the transmission mechanism comprises a first transmission part and a second transmission part connected with the action mechanism, wherein the first transmission part comprises a gear set, and the gear set at least comprises:

the driving gear is positioned in the first sealing chamber and is fixedly connected with the main shaft of the power mechanism;

the output gear is positioned at the final stage and is arranged in the second sealing chamber, an output shaft penetrating out of the wall of the second sealing chamber is also fixed on the output gear, the output shaft is linked with the second transmission part through the output shaft, and the output shaft is in rotary sealing fit with the wall of the second sealing chamber.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the chamber walls of the first sealing chamber and the second sealing chamber are of split butt joint structures; the power mechanism comprises a motor, at least one part of the motor is a plug-in part, the plug-in part is placed in and fixed in the mounting sleeve, and a main shaft of the motor further extends towards the direction of the second sealing chamber through the plug-in part.

Further, the wall of the first sealing chamber is provided with a reinforcing ring, and the reinforcing ring is in sealing abutment with the connecting base; the wall of the first sealing chamber comprises a first half shell and a second half shell which are mutually buckled and connected in a sealing mode, one radial side of the reinforcing ring is integrally formed with the first half shell, the other radial side of the reinforcing ring extends to the second half shell, and the second half shell is provided with an avoidance area with a corresponding shape.

Further, the chamber wall of the first sealing chamber further comprises a base, and the first half shell and the second half shell are in butt joint and then are in sealing connection with the base; the first half shell is also provided with a connecting ring and is in sealing connection with the base through the connecting ring; one radial side of the connecting ring and the first half shell are integrally structured, the other radial side of the connecting ring extends to the second half shell, and the second half shell is provided with an avoidance area with a corresponding shape; the power supply plug-in base is embedded on the base in a sealing way and penetrates through the connecting ring to be connected with the power mechanism.

Further, the first half shell, the second half shell and the base are integrally sealed by a sealing ring which is of a three-dimensional frame structure.

Optionally, a gear disc of the output gear is provided with an eccentric mass hole which is axially penetrated.

Optionally, the gear set includes the driving gear, the output gear, and a transition gear meshing between the driving gear and the output gear; the transition gear is in rotary sealing fit with the wall of the second sealing chamber; the transition gear extends into the first seal chamber at one axial end and has internal teeth that mesh with the drive gear, and extends into the second seal chamber at the other axial end and has external teeth that mesh with the output gear.

Further, the transition gear includes:

the external teeth are distributed on the conical surface of the conical part;

a cylindrical portion fixed to a large head side of the tapered portion and the internal teeth are distributed on an inner wall of the cylindrical portion;

the wall of the second sealing chamber is provided with a second through hole, and the outer peripheral surface of the cylindrical part is in sealing and rotating fit in the second through hole through a sealing bearing.

Optionally, the transition gear and the output gear together form a bevel gear pair for deceleration.

Optionally, the wall of the second sealing chamber is provided with a first through hole for the output shaft to pass through, the output shaft is sleeved with an elastic sealing element and a shaft sleeve in sequence along the axial direction, and two axial ends of the elastic sealing element are respectively abutted against the axial end face of the shaft sleeve and a gear disc of the output gear; the elastic sealing piece is respectively in sealing fit with the outer wall of the output shaft and the inner wall of the first through hole.

Further, the shaft sleeve moves in the first through hole in the axial direction, and the elastic sealing element is of an elastic structure which can be deformed in the axial direction so as to adapt to the displacement of the shaft sleeve; the outside of first through-hole is equipped with wear to overlap in on the output shaft and be used for limiting the limit displacement when the axle sleeve moves outwards spacing fender lid, rotate sealed cooperation between axle sleeve and the spacing fender lid.

An alternative, the elastic seal comprises:

at least two sealing rings, each sealing ring is sequentially arranged along the axial direction of the output shaft and is compressed between the axial end face of the shaft sleeve and the gear disc of the output gear, at least one sealing ring is in sealing fit with the outer wall of the output shaft, and at least one sealing ring is in sealing fit with the inner wall of the first through hole;

the elastic piece acts on at least one sealing ring to provide axial pretightening force.

A more specific alternative, the elastomeric seal comprises:

the first sealing ring is sleeved on the output shaft, and one end of the first sealing ring is in butt joint with a gear disc of the output gear;

the second sealing ring is sleeved on the output shaft, and one end of the second sealing ring is abutted against the axial end face of the shaft sleeve; one ends of the first sealing ring and the second sealing ring, which are opposite, are in butt connection, and a radial gap is reserved between the butt joint part and the outer surface of the shaft to form a cavity;

the spring is sleeved on the periphery of the first sealing ring through a spring seat.

Further, the inner annular surface of the first sealing ring is tightly attached to the outer wall of the output shaft and is in running fit with the outer wall of the output shaft; a radial gap is formed between the inner annular surface of the second sealing ring and the outer wall of the output shaft, and forms an axial channel which is communicated with the cavity.

Further, the elastic sealing member further comprises a collar for encapsulating the first sealing ring, the second sealing ring and the spring; the outer wall surface of the ring sleeve is in sealing fit with the inner wall surface of the first through hole.

Optionally, an inflation inlet communicated with the internal cavity is formed in the wall of the first sealing chamber, and an inflation nozzle assembly is arranged at the inflation inlet.

Optionally, the charging connector assembly includes an air tap installed at the air tap, an air tap fixing nut for fixing the air tap, an air tap sealing ring for sealing the air tap connection part, and an air tap cover for sealing the air tap and being detachable.

Optionally, the actuating mechanism comprises a reciprocating rod, one end of the reciprocating rod is connected with a linkage part, the linkage part is provided with a transmission hole, and a reversing transmission area is arranged in the transmission hole;

the second transmission part includes:

the first rotating wheel is linked with the output shaft and is provided with an eccentric pin;

the second rotating wheel is sleeved on the eccentric pin and is positioned in the reversing transmission area.

Optionally, the other end of the reciprocating lever is provided with a saw blade clamp.

Optionally, the device further comprises a housing covered outside the transmission mechanism and the action mechanism, and at least one expansion connecting part is arranged on the housing.

Optionally, the expansion connection part is a Pi Kading nylon guide rail.

Optionally, a battery pack for supplying power to the power mechanism is also included.

Optionally, the battery pack is buckled with the base of the first sealing chamber.

Compared with the prior art, the control switch has at least one of the following beneficial effects:

(1) The electric reciprocating saw has good sealing effect and can be suitable for amphibious;

(2) The electric reciprocating saw can be used for deepwater operation under the condition that the positive pressure seal is filled with specific air pressure in the sealing chamber, and the air pressure in the sealing chamber can resist the influence of deepwater water pressure.

(3) The portable electronic device is provided with a mountable platform, and can be quickly assembled and disassembled with a mounting piece such as a camera, a light source and the like.

(4) The switch controller can integrate a humidity sensor and has a water leakage self-checking function.

(5) The output gear is designed into an eccentric wheel, so that a counterweight structure can be omitted, the whole weight and the whole volume of the tool can be reduced, the power consumption can be reduced, and the kinetic energy of the motor can be transmitted to the action mechanism as much as possible.

(6) The electric tool can be operated by a single soldier, is small in size and convenient to carry, and is suitable for water area environments, sand and dust environments and the like;

(7) The battery can be replaced under water to the electric tool of this application, improves duration.

Drawings

FIG. 1 is a cross-sectional view of a reciprocating saw of the present application;

FIG. 2 is an exploded view of the reciprocating saw of the present application;

FIG. 3 is an exploded view of the transmission and actuation mechanism portions of FIGS. 1 and 2;

FIG. 4 is an axial cross-sectional view of the elastomeric seal of FIG. 3;

FIG. 5 is a schematic diagram illustrating assembly of the transmission mechanism and the actuator portion of FIG. 3;

FIG. 6 is a schematic diagram of the assembly of the control switch shown in FIGS. 1 and 2;

fig. 7 is a partial enlarged view of fig. 1 a.

Reference numerals shown in the drawings are as follows:

10. a sealed chamber; 20. a power mechanism; 30. a transmission mechanism; 40. an action mechanism; 50. an extension housing; 60. expanding the fitting; 70. a control switch; 80. a handle; 90. and an inflation nozzle assembly.

10. Sealing chamber: 101. a first sealing chamber 102, a second sealing chamber 103, a first half shell 104, a second half shell 105, a reinforcing ring 106, a connecting ring 107, a base 108, a 3D special-shaped sealing ring 109, a connecting base 110, a first sealing ring 111, a bottom cover 112, a second sealing ring 113, an output gear mounting seat 114, a third sealing ring 115, a power output platform (115 a, a first through hole 115b, a second through hole);

20. a power mechanism: 201. a motor 202, a spindle;

30. a transmission mechanism: 301. a driving gear 302, a first bearing 303, a transition gear 304, an output gear (304 a, a gear disc, 304b, an output shaft, 304c, a mass eccentric hole), 305, a second bearing 306, an elastic seal (306 a, a first seal ring, 306b, a second seal ring, 306c, a spring, 306d, a spring seat, 306e, a ring sleeve), 307, a shaft sleeve, 308, a fourth seal ring, 309, a limit stop cover, 310, a base, 311, a third bearing, 312, a first rotating wheel, 313, an eccentric pin, 314, a second rotating wheel, 315, a cover;

40. an action mechanism: 401. the reciprocating rod, 402, the linkage part, 403, the transmission hole, 404, the saw blade clamp, 405, the guide sliding sleeve, 406 and the L-shaped guard;

50. an expansion housing: 501. a housing body 502, an expansion connection portion;

60. expansion fitting: 601. a light source;

70. and (2) a control switch: 701. a switch controller (701 a, a controller body, 701b, a switch button), 702, a mechanical operating member (702 a, a pull rod, 702b, an operating portion, 702c, a controller mating portion, 702d, an elastic resetting member, 702e, a sealing plug, 702f, a fifth sealing ring, 702g, a sixth sealing ring), 703, a power supply base, 704, a scram switch, 705, a power supply plug base;

80. a handle: 801. a grip portion (801 a, support surface), 802, connection portion;

90. an inflation nozzle assembly: 901. air tap, 902, air tap sealing ring, 903, air tap cover.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

For a better description and illustration of embodiments of the present application, reference may be made to one or more of the accompanying drawings, but additional details or examples used to describe the drawings should not be construed as limiting the scope of any one of the inventive, presently described embodiments or preferred modes of carrying out the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 1 and 2, an amphibious electric reciprocating saw includes a power mechanism 20, a transmission mechanism 30 and an action mechanism 40. The inside of the reciprocating saw is provided with a sealing chamber 10, the sealing chamber comprises a first sealing chamber 101 and a second sealing chamber 102 which are in sealing butt joint, the first sealing chamber and the second sealing chamber are mutually independent, and the first sealing chamber is a sealing chamber sealed by positive pressure. The power mechanism 20 is installed in the first sealed chamber 101; the transmission mechanism 30 comprises a first transmission part connected with the power mechanism 20 and a second transmission part connected with the action mechanism 40, wherein the first transmission part comprises a gear set, the gear set comprises a driving gear 301 at the first stage, an output gear 304 at the last stage and a transition gear 303 meshed and driven between the driving gear 301 and the output gear 304 according to the transmission relation, and the driving gear 301 at the first stage is positioned in the first sealed chamber 101 and fixedly connected with a main shaft of the power mechanism 20; the output gear 304 at the final stage is positioned in the second sealing chamber, an output shaft 304b penetrating through the wall of the second sealing chamber 102 is fixed on the output gear, and is linked with the second transmission part through the output shaft 304b, and the output shaft 304b is in rotary sealing fit with the wall of the second sealing chamber; the transition gear 303 is in sealing and rotating engagement with the wall of the second seal chamber, and the transition gear 303 extends into the first seal chamber 101 at one axial end and has internal teeth for meshing with the drive gear 301, and extends into the second seal chamber 102 at the other axial end and has external teeth for meshing with the output gear 304.

The first sealing chamber 101 is in sealing butt joint with the second sealing chamber 102, the power mechanism 20 is packaged in the first sealing chamber 101, the driving gear 301 of a gear set of the transmission mechanism 30 is packaged in the first sealing chamber 101, the output gear 304 is packaged in the second sealing chamber 102, the driving gear 301 and the output gear 304 are in meshing transmission through the transition gear 303, the transition gear 303 is positioned at the butt joint position of the first sealing chamber and the second sealing chamber, the transition gear is in sealing running fit with the wall of the second sealing chamber, and the mounting mode of the transition gear not only realizes the transmission of power from the first sealing chamber to the second sealing chamber, but also realizes the independent of the second sealing chamber and the first sealing chamber.

The reciprocating saw can be used underwater, normal operation of a power mechanism and a first transmission part of the transmission mechanism is not affected, positive pressure sealing is adopted in the first sealing chamber, the influence of water pressure can be resisted, when the reciprocating saw is used for deepwater operation, the positive pressure can resist the influence of deepwater water pressure, an internal power mechanism is protected, and meanwhile smooth operation of the electric tool in deepwater (within the range of 0-50 m under water) is guaranteed.

As an assembly embodiment of the first seal chamber and the second seal chamber, the chamber walls of the first seal chamber 101 and the second seal chamber 102 are of a split butt joint structure, an annular connecting base 109 is clamped at a butt joint part in a sealing manner, an inner edge part of the connecting base 109 extends to the first seal chamber 101 to form a mounting sleeve, the power mechanism 20 comprises a motor 201, at least one part of the motor is a plug-in part, the plug-in part is placed and fixed in the mounting sleeve, and a main shaft 202 of the motor further extends to the direction of the second seal chamber 102 but does not extend into the second seal chamber through the plug-in part. As a specific structure of the first sealing chamber, the chamber wall of the first sealing chamber 101 includes a first half shell 103 and a second half shell 104 which are mutually buckled and connected in a sealing manner, the first half shell 103 is provided with a reinforcing ring 105, one radial side of the reinforcing ring 105 and the first half shell 103 are in an integral structure, the other radial side of the reinforcing ring 105 extends to the second half shell 104, and the second half shell 104 is provided with a avoidance area corresponding to the reinforcing ring shape. The first sealing chamber 101 is abutted against the connection base 109 by the reinforcing ring 105, and one embodiment of the connection base is provided with a radially extending outward flange and an axially extending cylinder part, the cylinder part extends into the reinforcing ring, the axial through hole of the cylinder part forms the mounting sleeve, and the outward flange is respectively connected with the reinforcing ring and the chamber wall of the second sealing chamber in a sealing abutting manner. The first sealing rings 110 are arranged between the reinforcing ring 105 and the flanging of the connecting base 109 and between the flanging of the connecting base 109 and the second sealing chamber 102, and are fixed by screws, so that the reinforcing ring 105 and the connecting base 109 and the second sealing chamber 102 are sealed and offset, the sealing between the first sealing chamber and the external environment is realized, and the sealing butt joint between the first sealing chamber and the second sealing chamber is realized.

The reinforcing ring 105 is located at the axial end of the first half shell 103, the radial direction of the reinforcing ring is perpendicular to the axial direction of the first half shell, the side wall of the first half shell 103 is further provided with a connecting ring 106, one radial side of the connecting ring 106 is integrally structured with the first half shell 103, the other radial side of the connecting ring extends to the second half shell 104, and the second half shell 104 is provided with an avoidance area corresponding to the shape of the connecting ring 106. The axis extension line of the connecting ring 106 is perpendicular to the axis extension line of the reinforcing ring 105. The chamber wall of the first sealing chamber 101 further comprises a base 107, and the first half-shell 103 and the second half-shell 104 are in sealing connection with the base 107 through a connecting ring 106 after being butted. The base 107 is embedded with a power plug base 705 in a sealing way, and the power plug base 705 is connected with the power mechanism 20 through a connecting ring. The power supply plug base is a underwater wet plug base, and can be embedded on the base in a sealing way through vulcanized rubber. The first half shell 103, the second half shell 104, the connecting ring 106 and the base 107 are integrally sealed by a 3D special-shaped sealing ring 108 with a three-dimensional frame structure, and then fixedly connected by screws.

As a specific structure of the second sealing chamber, as shown in fig. 2 and 3, the electric reciprocating saw has a bracket structure for mounting a transmission mechanism and an action mechanism, the bracket structure constituting a power output platform 115, a portion of the power output platform 115 connected to the first sealing chamber is provided as a hollow box structure, and an inner cavity of the box portion serves as the second sealing chamber.

As one embodiment of a gear set, the gear set includes a drive gear 301, an output gear 304, and a transition gear 303 meshing between the drive gear 301 and the output gear 304; the output gear 304 includes a gear disc 304a and an output shaft 304b, and a mass eccentric hole 304c is formed in the gear disc 304a, that is, the output gear is directly designed into an eccentric wheel, and eccentric impulse can be generated during rotation, so that the converted reciprocating linear motion has a certain impact, and jamming during the reciprocating linear motion is prevented. The driving gear 301 is fixed on the main shaft 202 of the motor, the transition gear 303 is in vector engagement, the output gear 304 is in vector transmission, in a specific embodiment, the transition gear and the output gear together form a bevel gear pair for speed reduction, more specifically, the output gear 304 is a large bevel gear, and the transition gear 303 is modified by a small bevel gear.

As one embodiment of the transition gear, the transition gear 303 includes a tapered portion and a cylindrical portion, and external teeth are distributed on the tapered surface of the tapered portion; the cylindrical portion is fixed to the large head side of the tapered portion and internal teeth are distributed on the inner wall of the cylindrical portion, the internal teeth being engaged with a driving gear 301 fixed to the main shaft 202 of the motor. Referring to fig. 1 and 3, a second through hole 115b is provided at a joint of the chamber wall of the second sealing chamber 102 and the chamber wall of the first sealing chamber 101, the outer circumferential surface of the cylindrical portion of the transition gear 303 is rotatably fitted in the second through hole through a first bearing 302 and axially limits the first bearing, the cone portion of the transition gear 303 is located in the second sealing chamber 102 and is engaged with the output gear through external teeth thereof, and the cylindrical portion of the transition gear further extends into the mounting sleeve of the connection base 109 and is engaged with the driving gear 301 through internal teeth thereof. The first bearing adopts a sealing bearing, and shaft sealing between the transition gear and the second through hole is realized through the sealing bearing, so that the second sealing chamber is independent of the first sealing chamber. As one of the axial limiting modes of the first bearing, the inner wall of the second through hole is provided with a limiting step, and the limiting step and the end face of the connecting base are matched to axially limit the first bearing.

The transition gear is in rotary fit in a second through hole of the wall of the second sealing chamber through a sealing bearing, so that the second sealing chamber is independent of the first sealing chamber, and the wall of the second sealing chamber is in sealing butt joint with the connecting base through the outer port of the second through hole, so that the second sealing chamber is in sealing butt joint with the first sealing chamber.

In order to facilitate the installation of the output gear 304 in the second sealing chamber, referring to fig. 3, the bottom of the box portion of the power output platform 115 is in a through structure and is sequentially sealed by the output gear mounting seat 113 and the bottom cover 111, the output gear mounting seat 113 and the bottom cover 111 are fixedly connected and sealed by the second sealing ring 112, the output gear mounting seat 113 and the bottom of the box portion of the power output platform 115 are fixedly connected and sealed by the third sealing ring 114, a connecting shaft coaxial with the output shaft is arranged on the opposite side of the output gear 304, the connecting shaft is arranged on the output gear mounting seat 113 through a shaft sleeve and the second bearing 305 and axially limits the second bearing 305, in one embodiment of the axial limiting, the outer surface of the shaft sleeve outside the connecting shaft and the inner surface of the shaft hole of the output gear mounting seat 113 are both provided with radially protruding limiting steps, the top surface of the second bearing is axially limited, the third bearing is supported on the protruding ring, the bottom surface of the third bearing is axially limited, and the annular groove between the protruding ring of the bottom cover and the outer edge is embedded with the second sealing ring.

Referring to fig. 3, an output shaft 304b of the output gear is vertically fixed on a gear disc 304a, the output shaft penetrates through a wall of the second sealing chamber 102 (i.e. the top of the power output platform box body in fig. 3) to be linked with the second transmission part, the output shaft is in rotary sealing fit with the wall of the second sealing chamber, as one implementation mode of rotary sealing fit, the wall of the second sealing chamber (i.e. the top of the power output platform box body in fig. 3) is provided with a first through hole 115a for the output shaft to penetrate through, an elastic sealing element 306 and a shaft sleeve 307 are sleeved on the output shaft in sequence along the axial direction, the shaft sleeve adopts a self-lubricating shaft sleeve, and two axial ends of the elastic sealing element 306 respectively abut against the axial end face of the shaft sleeve 307 and the gear disc 304a of the output gear; the elastic sealing member 306 is respectively in sealing engagement with the outer wall of the output shaft 304b and the inner wall of the first through hole 115a, so as to ensure that external liquid does not enter the second sealing chamber 102 through the first through hole 115 a.

Further, the shaft sleeve 307 moves in the axial direction in the first through hole 115a, and the elastic sealing member 306 is an elastic structure which can be deformed in the axial direction so as to adapt to the displacement of the shaft sleeve; the outside of the first through hole is also provided with a limiting blocking cover 309 which is sleeved on the output shaft and fixedly installed with the power output platform 115, the limiting blocking cover 309 is used for sealing the first through hole on one hand and limiting the limiting displacement when the shaft sleeve 307 moves outwards on the other hand, the shaft sleeve 307 is in rotary sealing fit with the limiting blocking cover 309, and sealing can be realized through a fourth sealing ring 308 sleeved between the shaft sleeve and the limiting blocking cover. The deformation of the elastic seal 306 in the axial direction can buffer vibration of the tool during operation, and the elastic seal has a damping effect at the same time.

As an embodiment of the elastic sealing member 306, the elastic sealing member includes at least two sealing rings and an elastic member, each sealing ring is sequentially arranged along the axial direction of the output shaft and is compressed between the axial end surface of the shaft sleeve and the gear disc of the output gear, at least one sealing ring is in sealing fit with the outer wall of the output shaft, and at least one sealing ring is in sealing fit with the inner wall of the first through hole; the elastic piece acts on at least one sealing ring to provide axial pretightening force.

In a more specific embodiment, as shown in FIG. 4, the resilient seal includes a first seal ring 306a, a second seal ring 306b, a spring 306c, and a spring seat 306d. The first sealing ring 306a is sleeved on the output shaft, and one end of the first sealing ring is abutted against the gear disc 304a of the output gear; the second sealing ring 306b is sleeved on the output shaft, and one end of the second sealing ring is abutted with the axial end face of the shaft sleeve 307; one ends of the first sealing ring and the second sealing ring, which are opposite, are in butt connection, and a radial gap is reserved between the butt joint part and the outer wall surface of the output shaft to form a cavity; the spring 306c is sleeved on the periphery of the first sealing ring 306a through a spring seat 306d, one axial end of the spring is abutted against the spring seat, and the other axial end is abutted against the outer edge of the joint of the first sealing ring and the second sealing ring. The inner annular surface of the first sealing ring 306a is closely attached to the outer wall of the output shaft 304b and is in running fit; a radial gap is formed between the inner annular surface of the second sealing ring and the outer wall of the output shaft, and the radial gap forms an axial channel which is communicated with the cavity.

The elastic sealing member further comprises a ring sleeve 306e for packaging the first sealing ring, the second sealing ring and the spring, wherein the abutting connection parts of the first sealing ring and the second sealing ring and part of the spring are packaged in the ring sleeve, and the outer wall surface of the ring sleeve 306e is in sealing fit with the inner wall surface of the first through hole 115 a.

The output shaft of the output gear passes through the box portion of the power output platform 115 and is linked with a second transmission portion, see fig. 3, the second transmission portion comprises a first rotary wheel 312 and a second rotary wheel 314, the first rotary wheel 312 is linked with the output shaft 304b, and the first rotary wheel is provided with an eccentric pin 313; the second rotating wheel 314 is sleeved on the eccentric pin 313.

For facilitating the installation of the second transmission part, a base 310 is arranged above the box part of the power output platform 115, a base fixing cover is arranged on the periphery of a limit stop cover 309, the center of a first rotating wheel is sleeved on an output shaft and fixedly connected with the output shaft, the outer edge of the first rotating wheel is rotatably installed in the base 310 through a third bearing 311 and is matched with the limit stop cover 309, and the third bearing 311 is axially limited. The second transmission part is linked with the action mechanism 40, one embodiment of the action mechanism 40 comprises a reciprocating rod 401, one axial end of the reciprocating rod 401 is fixed with a linkage part 402, the other axial end of the reciprocating rod 401 is fixed with a saw blade clamp 404, the linkage part is provided with a transmission hole 403, and the inside of the transmission hole is a reversing transmission area; the reciprocating bar 401 is sleeved on the second rotating wheel 314 through a transmission hole thereof, the second rotating wheel 314 is positioned in a reversing transmission area in the transmission hole 403, and the sealing cover 315 is buckled above the transmission hole and fixed with the base 310, and the sealing cover can be a T-shaped cover. The second rotating wheel may employ a bearing. A guide runner 405 is secured to the power take-off platform 115 through which the reciprocating bar 401 passes. The front end of the power take-off platform 115 secures an L-shaped shield 406.

The assembly modes of the first transmission part, the second transmission part and the actuating mechanism are as follows:

firstly, sequentially penetrating an elastic sealing element 306 and a shaft sleeve 307 of an axial sealing system on an output shaft 304b of an output gear, penetrating the output gear and the axial sealing system into a first through hole 115a of a power output platform 115 from bottom to top, fixing a base 310 on the power output platform 115 from top, and sequentially installing a limiting blocking cover 309, a first rotary wheel 312, a third bearing 311 and a second rotary wheel 314; the guiding sliding sleeve 405 is sleeved on the reciprocating rod 401, the reciprocating rod is sleeved on the second rotating wheel 314 through the transmission hole 403 of the linkage part of the guiding sliding sleeve, the third bearing 311 is pressed, the sealing cover 315 is pressed at the uppermost end and presses the linkage part of the reciprocating rod, the guiding sliding sleeve 405 is fixed on the base 310 through screws, and meanwhile, the guiding sliding sleeve 405 is fixed on the power output platform 115 through screws; the output gear mounting seat 113 embedded with the third sealing ring 114 is sleeved outside the shaft sleeve of the connecting shaft at the bottom of the output gear and is fixed with the power output platform 115 through screws, a second bearing 305 is sleeved on the output gear mounting seat, and finally the bottom cover 111 embedded with the second sealing ring 112 is pressed at the bottommost part and is fixedly connected with the bottom of the output gear mounting seat 115 through screws.

To facilitate the installation of extension parts such as light sources, the electric reciprocating saw further comprises an extension housing 50 covering the transmission mechanism 30 and the action mechanism 40, wherein the extension housing 50 comprises a housing body 501 and at least one extension connection part 502 fixed on the housing body 501. The expansion connection part can adopt a guide rail of a leather card Ding Ni. The expansion joint is used to assemble an expansion fitting 60, which is selected by itself according to the equipment requirements, such as a lamp, grip, camera, etc. The expansion fitting as shown in fig. 2 is a light source 601 that is quickly assembled and disassembled by means of Pi Kading nylon guide rails.

The sealing chamber adopts positive pressure sealing to adapt to deepwater operation, and as one implementation mode of positive sealing, an air charging port communicated with an internal cavity is formed on the chamber wall (preferably at the bottom and not marked in the figure) of the first sealing chamber 101, and an air charging nozzle assembly 90 is arranged at the air charging port. The air charging nozzle assembly comprises an air nozzle 901, an air nozzle sealing ring 902 and an air nozzle cover 903, wherein the air nozzle is fixedly arranged at the air charging port through an air nozzle fixing nut, the air charging nozzle is sealed between the chamber walls of the sealing chamber through the air nozzle sealing ring, and the air nozzle cover is detachably closed.

In a preferred embodiment, the reciprocating saw of the present application further comprises a battery pack (not shown) which is snap-fit to the base of the first seal chamber, and the battery provides power to the power mechanism. The battery pack is preferably a battery pack that can be directly replaced under water.

In a more preferred embodiment, the reciprocating saw of the present application further includes a modified control switch 70, see fig. 1, 2, 6 and 7, the control switch 70 including a switch controller 701 and a mechanical operating control 702; a switch controller 701 is enclosed in the first sealed chamber 101, and the switch controller 701 has an on state and an off state for controlling the start and stop of the power mechanism 20; the mechanical operation member 702 penetrates through the first sealed chamber wall and is in sealing connection with the first sealed chamber wall, and the mechanical operation member 702 has an initial state (initial state in fig. 1 and 6) corresponding to the off state of the switch controller and a pull-out state corresponding to the on state of the switch controller.

The mechanical operation control 702 includes a pull rod 702a, an operation portion 702b, and a controller engagement portion 702c: the pull rod 702a is hermetically mounted on the distal end face of the first seal chamber wall relative to the actuating mechanism and can be driven in its own axial direction; the operation part 702b is fixedly arranged on the part of the pull rod outside the first sealing chamber; the controller mating portion 702c is fixedly mounted on the end portion of the pull rod located in the first sealing chamber, and the switch controller 701 has a switch button mated with the controller mating portion. The switch controller 701 includes a controller body 701a and a switch button 701b.

Further, a switch button 701b is located on the opposite side of the switch controller from the pull rod 702 a; the controller engaging portion 702c has an actuator arm extending around the switch controller and bent to the outside of the switch button end, and at least a part of the inner surface of the actuator arm serves as a switch contact surface with the switch button end. Still further, the mechanical control 702 also includes a resilient return 702d that acts between the actuator arm and the body of the switch controller. Further, the elastic reset piece 702d is a spring sleeved on the switch button, one end of the spring is abutted against the switch contact surface of the actuating arm, and the other end of the spring is abutted against the surface of the body of the switch controller. More specifically, the actuating arm is an annular frame surrounding the switch controller, further, the annular frame is a rectangular frame or a positive direction frame, one of two opposite sides of the rectangular frame or the positive direction frame is fixedly connected with the pull rod 702a, the other side is matched with the switch button 701b, and the center part of the inner wall of the side matched with the switch button is a switch contact surface.

When the pull rod 702a is pulled outwards, the actuating arm is driven to apply force to the switch button 701b through the bending part of the actuating arm, the switch button is pressed towards the inner wall of the controller body, and the switch is turned on; releasing the pull rod 702a and the elastic reset piece 702d resets the pull rod, the switch button pops up and the switch is opened.

The pull rod is in sealing installation with the wall of the first sealing chamber, a mounting hole is formed in the wall of the first sealing chamber 101, the mechanical operation control 702 further comprises a sealing plug 702e which is in sealing fixation at the mounting hole, and a through hole for installing the pull rod 702a is formed in the sealing plug 702 e. The sealing plug is fixedly arranged between the sealing plug and the wall of the first sealing chamber in a sealing way. One embodiment of the sealing plug comprises a plug head and a plug tail, wherein the plug tail is fixedly arranged in a mounting hole through a nut, the nut is positioned on the inner side of the wall of the first sealing chamber, the plug head is positioned on the outer side of the wall of the first sealing chamber and abuts against the outer wall surface of the wall of the first sealing chamber, and a fifth sealing ring 702f is arranged at the abutting position. The pull rod passes through the through hole on the sealing plug, two sixth sealing rings 702g are sleeved on the pull rod along the axial direction of the pull rod, and the sixth sealing rings 702g are in sliding fit with the inner wall of the through hole of the sealing plug.

The first seal chamber wall has a handle 80 at a distal end of the relative motion mechanism 40, the handle 80 having a grip portion 801 and a connecting portion 802 connecting the grip portion 801 and the first seal chamber wall, a gap being provided between the grip portion 801 and an end face of the distal end of the first seal chamber wall, and a portion of the mechanical operating member 702 extending outside the first seal chamber wall being located in the gap. Furthermore, the holding part is a columnar holding part, an included angle of 60-90 degrees is formed between the central axis of the columnar holding part and the axial extension line of the pull rod, and is preferably approximately vertical, and the movement path of the pull rod is in the axial direction of the pull rod. More specifically, the handle is an annular handle, namely, two ends of the columnar holding part are connected with the wall of the first sealing chamber through connecting parts, and the whole handle extends along the extension line of the reciprocating path of the actuating mechanism.

The operating portion 702b has a hand-held portion extending radially outwardly of the tie rod as one embodiment of the operating portion, which is secured to a portion of the tie rod located outside of the wall of the first seal chamber. Further, the hand-held portion includes two parts with the tie rod 702a as an axis of symmetry. Further, the operating portion 702b is fixed to an end of the tie rod 702 a. As a specific embodiment of the hand-held part, the hand-held part is a pull handle or a pull ring. The extending direction of the pull rod or the pull ring along the radial direction of the pull rod is parallel to the extending direction of the central axis of the columnar holding part of the handle.

The pull rod is pulled outwards, the motor is started, power is transmitted to the first rotating wheel through the gear set, the first rotating wheel rotates, the second rotating wheel is driven to eccentrically rotate through the eccentric pin of the first rotating wheel, and accordingly the reciprocating rod is driven to reciprocate in a linear motion, and the rotation of the motor is converted into the reciprocating linear motion of the reciprocating rod.

The control switch may also include a scram switch 704, the scram switch 704 being coupled to the controller body to stop operation of the apparatus in the event of an underwater or other emergency, the scram switch itself being conventionally assembled for power tools.

The utility model provides a still be equipped with the self-checking system that leaks in the electronic reciprocating saw, dispose humidity transducer, humidity transducer integrated in the controller, the instrument is automatic to start self-checking system under the inside water condition.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An amphibious electric reciprocating saw comprises a power mechanism, a transmission mechanism and an action mechanism; the reciprocating saw is characterized in that a first sealing chamber and a second sealing chamber which are mutually independent and are in sealing butt joint are arranged in the reciprocating saw, and the first sealing chamber is a sealing chamber sealed by positive pressure;

the output gear is arranged in the second sealing chamber, an output shaft penetrating through the wall of the second sealing chamber is also fixed on the output gear, and is linked with the second transmission part through the output shaft, and the output shaft is in rotary sealing fit with the wall of the second sealing chamber;

the wall of the second sealing chamber is provided with a first through hole for the output shaft to pass through, the output shaft is sequentially sleeved with an elastic sealing element and a shaft sleeve along the axial direction, and two axial ends of the elastic sealing element are respectively abutted against the axial end face of the shaft sleeve and a gear disc of the output gear; the elastic sealing piece is respectively in sealing fit with the outer wall of the output shaft and the inner wall of the first through hole;

the shaft sleeve axially moves in the first through hole, and the elastic sealing element is of an elastic structure which can be deformed axially so as to adapt to the displacement of the shaft sleeve; the outside of first through-hole is equipped with wear to overlap in on the output shaft and be used for limiting the limit displacement when the axle sleeve moves outwards spacing fender lid, rotate sealed cooperation between axle sleeve and the spacing fender lid.

2. The electric reciprocating saw of claim 1, wherein the chamber walls of both the first and second sealed chambers are of a split docking configuration; the power mechanism comprises a motor, at least one part of the motor is a plug-in part, the plug-in part is placed in and fixed in the mounting sleeve, and a main shaft of the motor further extends towards the direction of the second sealing chamber through the plug-in part.

3. The electric reciprocating saw of claim 2, wherein a wall of the first sealing chamber carries a reinforcing ring and is sealed against the connection base by the reinforcing ring; the wall of the first sealing chamber comprises a first half shell and a second half shell which are mutually buckled and connected in a sealing mode, one radial side of the reinforcing ring is integrally formed with the first half shell, the other radial side of the reinforcing ring extends to the second half shell, and the second half shell is provided with an avoidance area with a corresponding shape.

4. The power reciprocating saw of claim 3 wherein the chamber wall of said first sealed chamber further comprises a base, said first and second halves being in sealing engagement with said base after being docked; the first half shell is also provided with a connecting ring and is in sealing connection with the base through the connecting ring; one radial side of the connecting ring and the first half shell are integrally structured, the other radial side of the connecting ring extends to the second half shell, and the second half shell is provided with an avoidance area with a corresponding shape; the power supply plug-in base is embedded on the base in a sealing way and penetrates through the connecting ring to be connected with the power mechanism.

5. The electric reciprocating saw of claim 3, wherein the first half shell, the second half shell and the base are integrally sealed by a sealing ring in a three-dimensional frame structure.

6. The electric reciprocating saw of claim 1, wherein the gear plate of the output gear is provided with an eccentric mass hole passing through in an axial direction.

7. The electric reciprocating saw of claim 1, wherein said gear set includes said drive gear, said output gear, and a transition gear meshing between said drive gear and said output gear; the transition gear is in rotary sealing fit with the wall of the second sealing chamber; the transition gear extends into the first seal chamber at one axial end and has internal teeth that mesh with the drive gear, and extends into the second seal chamber at the other axial end and has external teeth that mesh with the output gear.

8. The electric reciprocating saw of claim 7, wherein,

the transition gear includes:

the external teeth are distributed on the conical surface of the conical part;

9. The electric reciprocating saw of claim 7, wherein said transition gear and output gear together form a bevel gear pair for speed reduction.

10. The power reciprocating saw of claim 1, wherein said elastomeric seal comprises:

11. The power reciprocating saw of claim 1, wherein said elastomeric seal comprises:

12. The electric reciprocating saw of claim 11, wherein the inner annular surface of the first sealing ring is closely attached to the outer wall of the output shaft and is in running fit; a radial gap is formed between the inner annular surface of the second sealing ring and the outer wall of the output shaft, and forms an axial channel which is communicated with the cavity.

13. The power reciprocating saw of claim 11, wherein said elastomeric seal further comprises a collar for enclosing said first seal ring, second seal ring and spring; the outer wall surface of the ring sleeve is in sealing fit with the inner wall surface of the first through hole.

14. The electric reciprocating saw of claim 2, wherein an inflation port is formed in the wall of the first sealing chamber and is communicated with the inner cavity, and an inflation nozzle assembly is arranged at the inflation port.

15. The electric reciprocating saw of claim 1, wherein the actuating mechanism comprises a reciprocating rod, one end of the reciprocating rod is connected with a linkage part, the linkage part is provided with a transmission hole, and a reversing transmission area is arranged in the transmission hole;

the second transmission part includes:

16. The power reciprocating saw of claim 15, wherein said reciprocating bar has a blade clamp at the other end.

17. The electric reciprocating saw of claim 1, further comprising a housing covering the drive mechanism and the action mechanism, the housing having at least one expansion joint mounted thereon.

18. The electric reciprocating saw of claim 1, further comprising a battery pack that powers said power mechanism.