CN212976951U

CN212976951U - Direct current reciprocating saw

Info

Publication number: CN212976951U
Application number: CN202021840469.3U
Authority: CN
Inventors: 王志明
Original assignee: Ningbo Yuxiang Tools Co ltd
Current assignee: Ningbo Yuxiang Tools Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-16
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a direct current reciprocating saw, which comprises a machine shell, a transmission mechanism and a saw blade, wherein the transmission mechanism comprises an installation shell and an eccentric wheel, reciprocating lever and motor, be equipped with the eccentric shaft on the eccentric wheel, the outer edge of eccentric wheel is equipped with first bevel gear, be connected with the second bevel gear with first bevel gear meshing on the output shaft of motor, reciprocating lever passes through fixture and can dismantle with the saw bit and be connected, be equipped with the locking hole on the saw bit, fixture includes the centre gripping axle, stop collar and torsional spring, be equipped with the open slot on the centre gripping axle, the last through-hole that communicates with each other with the open slot that still is equipped with of centre gripping axle, be equipped with the locking piece in the through-hole, the one end and the locking hole backstop cooperation of locking piece, the other end of locking piece offsets the cooperation with the inside wall of stop collar, the inside wall of stop collar is equipped with the adjustment tank, the inside wall smooth transition of adjustment tank. The utility model discloses possess simple structure, convenient to use, saw bit dismouting swiftly and connect firm advantage.

Description

Direct current reciprocating saw

Technical Field

The utility model belongs to the technical field of garden instrument, in particular to direct current reciprocating saw.

Background

A reciprocating saw is an electric tool for sawing by a reciprocating saw blade. The conventional reciprocating saw generally comprises a reciprocating rod capable of reciprocating and a saw blade connected to the reciprocating rod, wherein the reciprocating rod is driven by a motor to reciprocate so as to drive the saw blade to reciprocate, so that cutting is realized. The reciprocating saw is suitable for sawing metal plates, pipes and profiles or cutting bevel on steel pipes, and can also be used for cutting cables or other non-metal materials. In garden work, the pruning machine is mainly used for pruning tree branches; the existing saw blade is relatively troublesome to disassemble and assemble and is not firm to connect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a direct current reciprocating saw, possess simple structure, convenient to use, saw bit dismouting swiftly and connect firm advantage.

The utility model provides a technical scheme that its technical problem adopted is: a direct current reciprocating saw comprises a casing capable of being operated by hands, a transmission mechanism and a saw blade, wherein the transmission mechanism and the saw blade are arranged in the casing, the transmission mechanism comprises an installation shell, an eccentric wheel, a reciprocating rod, a motor, an eccentric shaft and a clamping mechanism, the eccentric wheel is rotatably arranged in the installation shell, the reciprocating rod is slidably arranged in the installation shell, the motor is fixed on the installation shell, the eccentric wheel is provided with an eccentric shaft, the outer edge of the eccentric wheel is provided with a first bevel gear, the output shaft of the motor is connected with a second bevel gear meshed with the first bevel gear, the inner side end of the reciprocating rod is provided with a driving ring matched with the eccentric shaft, the outer side end of the reciprocating rod is detachably connected with the saw blade through the clamping mechanism, the saw blade is provided with a locking hole, the clamping mechanism comprises a clamping shaft arranged at the outer side end of the reciprocating rod, a limiting sleeve and, the epaxial still be equipped with of centre gripping with the communicating through-hole of open slot, it is equipped with the locking piece to slide in the through-hole, the one end of locking piece with the cooperation of lockhole backstop, the other end of locking piece with the inside wall counterbalance cooperation of stop collar, the inside wall of stop collar is equipped with the adjustment tank, the adjustment tank with the inside wall smooth transition of stop collar, the torsional spring makes all the time the locking piece with lockhole backstop complex trend.

Furthermore, the front end of the casing is slidably connected with a support, the support is arranged corresponding to the saw blade, and the tail end of the casing is detachably connected with an extension bar; the operation is more convenient, and branches at high positions can be trimmed conveniently.

Further, a clamping groove is formed in the tail end of the casing, a connecting seat is hinged to the extension bar, a protruding block matched with the clamping groove in a clamping mode is arranged on the connecting seat, a sliding groove is formed in the connecting seat, a limiting block matched with the casing in a locking mode is arranged in the sliding groove in a sliding mode, and a first spring for driving the limiting block to lock the casing is arranged between the limiting block and the sliding groove in a propping mode; the extension bar is convenient to detach, convenient to operate and convenient to carry or store.

Furthermore, a hinge seat is arranged on the extension bar, a hinge hole is arranged on the connecting seat, and the hinge seat is in hinge fit with the hinge hole through a hinge shaft; the angle of the casing relative to the extension bar can be conveniently adjusted, and trimming operation is facilitated.

Furthermore, a second spring is arranged between the hinged shaft and the hinged seat in a propping manner, an external spline is arranged on the hinged shaft, a first internal spline matched with the external spline is arranged on the hinged seat, and a second internal spline matched with the external spline is arranged in the hinged hole; the angle of the casing relative to the extension bar is convenient to adjust, the connection is firm, and the rotation caused by errors is avoided.

Further, along the axial direction of articulated shaft, the length of outer spline is less than or equal to the length of first interior spline, the length of outer spline is greater than the length of second interior spline, the second spring has the trend that makes outer spline block in the second interior spline all the time.

Further, a handle is arranged on the extension bar, a power supply electrically connected with the motor is arranged on the handle, and a handle is further arranged on the extension bar; the operation of operators is convenient, and the holding is convenient.

Further, a sliding block which is in sleeve fit with the reciprocating rod is fixed in the mounting shell; the reciprocating rod can move stably and reliably.

Furthermore, a slip-off preventing ring is sleeved between the limiting sleeve and the clamping shaft and is fixed on the clamping shaft, a convex ring matched with the limiting sleeve in a stop way is arranged on the clamping shaft, and a snap spring matched with the limiting sleeve in a stop way is arranged at the end, far away from the convex ring, of the slip-off preventing ring; the connection of the stop collar is convenient.

Furthermore, one end of the torsion spring is hooked in the open slot, and a limit slot for hooking the other end of the torsion spring is arranged on the limit sleeve; the torsion spring is convenient to connect.

The utility model has the advantages that: the saw blade is detachably connected to the reciprocating rod through the clamping mechanism, normally, one end, provided with a locking hole, of the saw blade is inserted into the open slot, one end of the locking piece is abutted and matched with the inner side wall of the limiting sleeve, the other end of the locking piece penetrates through the locking hole under the action of the torsion spring and forms stop matching, and the saw blade is firmly fixed on the reciprocating rod; when the saw bit is dismantled to needs, rotatable stop collar and the elasticity of overcoming the torsional spring, the adjustment tank is the relative centre gripping axle rotation also, just to the through-hole until the adjustment tank, extracts the saw bit from the open slot this moment, and the saw bit promotes the locking piece, and the locking piece slides along the through-hole, and locking piece one end withdraws from the locking hole, and the other end supports in the adjustment tank for the saw bit can easily be taken off, makes the saw bit dismouting swift and convenient from this, generally speaking, the utility model discloses simple structure, convenient to use, saw bit dismouting are swift and connect firm advantage have been possessed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the transmission mechanism of the present invention with a part of the casing removed.

Fig. 3 is an exploded view of the connecting socket of the present invention.

Fig. 4 is an exploded view of the clamping mechanism of the present invention.

Fig. 5 is a schematic sectional view of the clamping mechanism of the present invention.

Shown in the figure: 1-a machine shell; 11-a card slot; 2-a transmission mechanism; 21-mounting the housing; 22-eccentric wheel; 221-an eccentric shaft; 222-a first bevel gear; 23-a reciprocating lever; 231-drive ring; 24-a motor; 25-a second bevel gear; 26-a slide block; 3-a saw blade; 31-a locking hole; 4-a clamping mechanism; 41-a clamping shaft; 411-open slot; 412-a via; 413-a convex ring; 42-a stop collar; 421-a regulating tank; 422-a limiting groove; 43-torsion spring; 44-a lock; 45-anti-slip ring; 46-a clamp spring; 5-a bracket; 6-lengthening the rod; 61-a handle; 62-a power supply; 63-a handle; 7-a connecting seat; 71-bumps; 72-a chute; 73-hinge hole; 731-second internal spline; 8-a limiting block; 81-baffle plate; 9-a first spring; 10-a hinged seat; 101-a first internal spline; 20-a hinged axis; 201-external splines; 30-second spring.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1 to 5, a dc reciprocating saw comprises a housing 1 capable of being operated by hand, a transmission mechanism 2 and a saw blade 3, the transmission mechanism 2 comprises a mounting housing 21, an eccentric wheel 22 rotatably disposed in the mounting housing 21, a reciprocating rod 23 slidably disposed in the mounting housing 21, and a motor 24 fixed on the mounting housing 21, the eccentric wheel 22 is provided with an eccentric shaft 221, the outer edge of the eccentric wheel 22 is provided with a first bevel gear 222, an output shaft of the motor 24 is connected with a second bevel gear 25 engaged with the first bevel gear 222, the inner end of the reciprocating rod 23 is provided with a driving ring 231 adapted to the eccentric shaft 221, the outer end of the reciprocating rod 23 is detachably connected with the saw blade 3 through a clamping mechanism 4, the saw blade 3 is provided with a locking hole 31, the clamping mechanism 4 comprises a clamping shaft 41 disposed at the outer end of the reciprocating rod 23, a limit sleeve 42 sleeved on the clamping shaft 41, and a torsion spring 43, the clamping shaft 41 is provided with an open slot 411 for accommodating the saw blade 3, the clamping shaft 41 is further provided with a through hole 412 communicated with the open slot 411, a locking piece 44 is arranged in the through hole 412 in a sliding mode, one end of the locking piece 44 is matched with the locking hole 31 in a stopping mode, the other end of the locking piece 44 is matched with the inner side wall of the limiting sleeve 42 in a propping mode, the inner side wall of the limiting sleeve 42 is provided with an adjusting groove 421, the adjusting groove 421 is in smooth transition with the inner side wall of the limiting sleeve 42, and the torsion spring 43 always tends to enable the locking piece 44 to be matched with.

The front end sliding connection of casing 1 has support 5, and support 5 corresponds the setting with saw bit 3, and the tail end of casing 1 can be dismantled and be connected with extension bar 6.

Preferably, the driving ring 231 is waist-shaped, so as to facilitate transmission; waist type hole has been seted up on support 5, adopts the screw to pass waist type hole and fixes support 5 on installation shell 21, can loosen the screw, and support 5 slides the back along the extending direction in waist type hole to adjust to suitable position, screws the screw again, locks support 5 once more, thereby has adjusted the position of support 5 relative saw bit 3, makes saw bit 3 be suitable for different operating modes, and the cutting is convenient and safe more.

Specifically, the machine shell 1 is a left shell and a right shell which are buckled with each other, and the clamping mechanism 4 is fixed in the machine shell 1 through screws; the mounting shell 21 is an upper shell and a lower shell which are buckled with each other, and the eccentric wheel 22 is rotatably arranged in the mounting shell through a bearing, so that the mounting is convenient and the manufacturing is simple.

The tail end of casing 1 is equipped with draw-in groove 11, and it has connecting seat 7 to articulate on extension bar 6, is equipped with on connecting seat 7 with draw-in groove 11 joint complex lug 71, has seted up spout 72 on the connecting seat 7, and it has the stopper 8 with casing 1 locking complex to slide in the spout 72, supports between stopper 8 and the spout 72 to be equipped with the first spring 9 that orders about stopper 8 locking casing 1.

Specifically, a baffle 81 which is matched with the sliding groove 72 in a stopping manner is arranged on the limiting block 8 to prevent the limiting block 8 from falling off from the sliding groove 72, one end of the limiting block 8 is in sliding fit with the sliding groove 72, and the other end of the limiting block 8 is exposed out of the outer side of the connecting seat 7 and matched with the casing 1 in a stopping manner; normally, draw-in groove 11 and lug 71 joint cooperation, stopper 8 is under first spring 9's effect, and the end backstop casing 1 in the stopper 8 exposure outside locks casing 1 on extension bar 6, and when pressing down stopper 8 messenger and slide and overcome first spring 9's elasticity along spout 72, the end in the stopper 8 exposure outside slides in spout 72, removes the locking, and at this moment, can be convenient dismantle casing 1 get off, be convenient for operate or save.

The extension bar 6 is provided with a hinge seat 10, the connecting seat 7 is provided with a hinge hole 73, and the hinge seat 10 is in hinge fit with the hinge hole 73 through a hinge shaft 20; a second spring 30 is arranged between the hinge shaft 20 and the hinge seat 10 in a propping manner, the hinge shaft 20 is provided with an external spline 201, the hinge seat 10 is provided with a first internal spline 101 matched with the external spline 201, and a second internal spline 731 matched with the external spline 201 is arranged in the hinge hole 73; the length of the external spline 201 is less than or equal to the length of the first internal spline 101, the length of the external spline 201 is greater than the length of the second internal spline 731, and the second spring 30 always has a tendency to cause the external spline 201 to be caught in the second internal spline in the axial direction of the hinge shaft 20.

Specifically, two hinge holes 73 and two hinge shafts 20 are respectively provided, and correspondingly, the second spring 30 and other structures are also arranged in a matching manner; through pressing articulated shaft 20 and overcoming the elasticity of second spring 30, the length of external splines 201 is less than or equal to the length of first internal splines 101, the length of external splines 201 is greater than the length of second internal splines 731, make external splines 201 break away from second internal splines 731, at this moment, connecting seat 7 can rotate relative articulated seat 10, rotate to suitable angle, loosen articulated shaft 20 again, make external splines 201 block into second internal splines 731, because the structure of spline, make connecting seat 7 fix once more relative articulated seat 10, not relative rotation.

The extension bar 6 is provided with a handle 61, the handle 61 is provided with a power supply 62 electrically connected with the motor 24, and the extension bar 6 is also provided with a handle 63; preferably, the extension bar 6 is a plurality of sleeved pipes, the pipes are connected in a matching manner through a locking mechanism, and the locking mechanism can be one of a screw locking structure, a hasp structure and a pipe thread structure; specifically, the handle 61 is provided with a start button connected in series between the motor 24 and the power source 62; preferably, the power source 62 is a removable battery.

It is worth mentioning that when the extension bar 6 is installed, one hand can hold the handle 61 and the other hand can hold the handle 63, and the length of the extension bar 6 is adjusted, so that the reciprocating saw can trim materials which are relatively far away from an operator, such as branches of trees and the like; when extension bar 6 is dismantled from casing 1, can dismantle power 62 on extension bar 6 and install at casing 1 tail end, can hand casing 1 direct operation, be convenient for cut like plank, tubular product equidistance operator relatively nearer material, convenient operation and flexibility, application scope is wider.

A sliding block 26 which is in sleeve fit with the reciprocating rod 23 is fixed in the mounting shell 21; specifically, the two annular sliding blocks 26 are matched with the outer side wall of the reciprocating rod 23, and the two annular sliding blocks 26 enable the reciprocating rod to move stably and reliably.

A slip-off preventing ring 45 is sleeved between the limiting sleeve 42 and the clamping shaft 41, the slip-off preventing ring 45 is fixed on the clamping shaft 41, a convex ring 413 matched with the limiting sleeve 42 in a stop manner is arranged on the clamping shaft 41, and a snap spring 46 matched with the limiting sleeve 42 in a stop manner is arranged at the end, far away from the convex ring 413, of the slip-off preventing ring 45; specifically, the slip-off preventing ring 45 is fixed on the clamping shaft 41 by a pin, and is provided with a matching hole corresponding to the through hole 412, and the slip-off preventing ring 45 is provided with a ring groove convenient for mounting the snap spring 46.

One end of the torsion spring 43 is hooked in the open slot 411, and the limiting sleeve 42 is provided with a limiting slot 422 for hooking the other end of the torsion spring 43.

Preferably, the locking member 44 is a plurality of steel balls mounted in the through hole 412, and the steel balls are tightly fitted with each other, and the gap is small or no gap exists; a plurality of ribs convenient to rotate are arranged on the outer wall of the limiting sleeve 42 in a protruding mode, an arrow with a marking function is further arranged on the outer wall of the limiting sleeve 42, the limiting sleeve 42 is convenient to rotate, and operation is convenient and rapid.

Specifically, under normal conditions, one end of the saw blade 3, which is provided with the locking hole 31, is inserted into the opening slot 411, one end of the locking member 44 abuts against and is matched with the inner side wall of the limiting sleeve 42, and the other end of the locking member 44 penetrates through the locking hole 31 under the action of the torsion spring 43 and forms stop matching, so that the saw blade 3 is firmly fixed on the reciprocating rod 23; when the saw blade 3 needs to be disassembled, the limiting sleeve 42 can be rotated according to the indication mark of the limiting sleeve 42 and the elasticity of the torsion spring 43 can be overcome, the adjusting groove 421 also rotates relative to the clamping shaft 41 until the adjusting groove 421 is just opposite to the through hole 412, the saw blade 3 is pulled out from the open groove 411 at the moment, the saw blade 3 pushes the locking piece 44, the locking piece 44 slides along the through hole 412, one end of the locking piece 44 is withdrawn from the locking hole 31, the other end of the locking piece is propped against the adjusting groove 421, the saw blade 3 can be easily taken down, and therefore the saw blade 3 is quickly and conveniently disassembled.

The specific working principle of the utility model is as follows, motor 24 starts, and the first bevel gear 222 of 25 second bevel gears 25 transmission on the output shaft, eccentric wheel 22 rotate, and eccentric shaft 221 transmission drive ring 231, the relative slider 26 of drive ring 231 slide for the reciprocal action of saw bit 3 realizes the cutting action of saw bit 3.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A direct current reciprocating saw comprises a casing (1) capable of being operated by hands, a transmission mechanism (2) and a saw blade (3), wherein the transmission mechanism (2) is arranged in the casing (1), the transmission mechanism (2) comprises a mounting shell (21), an eccentric wheel (22) rotatably arranged in the mounting shell (21), a reciprocating rod (23) slidably arranged in the mounting shell (21) and a motor (24) fixed on the mounting shell (21), an eccentric shaft (221) is arranged on the eccentric wheel (22), a first bevel gear (222) is arranged on the outer edge of the eccentric wheel (22), a second bevel gear (25) meshed with the first bevel gear (222) is connected onto an output shaft of the motor (24), a driving ring (231) matched with the eccentric shaft (221) is arranged at the inner side end of the reciprocating rod (23), and the outer side end of the reciprocating rod (23) is detachably connected with the saw blade (3) through a clamping mechanism (4),

the method is characterized in that: be equipped with locking hole (31) on saw bit (3), fixture (4) including set up in hold-down spindle (41) of reciprocating lever (23) outside end, cup joint in stop collar (42) and torsional spring (43) on hold-down spindle (41), be equipped with the holding on hold-down spindle (41) the open slot (411) of saw bit (3), still be equipped with on hold-down spindle (41) with communicating through-hole (412) of open slot (411), it is equipped with locking piece (44) to slide in through-hole (412), the one end of locking piece (44) with locking hole (31) backstop cooperation, the other end of locking piece (44) with the inside wall counterbalance cooperation of stop collar (42), the inside wall of stop collar (42) is equipped with adjustment tank (421), adjustment tank (421) with the inside wall smooth transition of stop collar (42), torsional spring (43) make all the time locking piece (44) with locking hole (31) complex trend tends to backstop .

2. A direct current reciprocating saw as defined in claim 1 wherein: the front end sliding connection of casing (1) has support (5), support (5) with saw bit (3) correspond the setting, the tail end of casing (1) can be dismantled and be connected with extension bar (6).

3. A direct current reciprocating saw as defined in claim 2 wherein: the tail end of casing (1) is equipped with draw-in groove (11), it has connecting seat (7) to articulate on extension bar (6), be equipped with on connecting seat (7) with draw-in groove (11) joint complex lug (71), spout (72) have been seted up on connecting seat (7), slide in spout (72) be equipped with casing (1) locking complex stopper (8), stopper (8) with it orders about to be equipped with to support between spout (72) stopper (8) locking first spring (9) of casing (1).

4. A dc reciprocating saw as defined in claim 3, wherein: be equipped with articulated seat (10) on extension bar (6), be equipped with hinge hole (73) on connecting seat (7), articulated seat (10) with through articulated shaft (20) articulated cooperation between hinge hole (73).

5. A DC reciprocating saw as defined in claim 4 wherein: articulated shaft (20) with it is equipped with second spring (30) to support between articulated seat (10), be equipped with external splines (201) on articulated shaft (20), be equipped with on articulated seat (10) with first internal splines (101) of external splines (201) looks adaptation, be equipped with in hinge hole (73) with second internal splines (731) of external splines (201) looks adaptation.

6. A DC reciprocating saw as defined in claim 5 wherein: along in the axial direction of articulated shaft (20), the length of external splines (201) is less than or equal to the length of first internal splines (101), the length of external splines (201) is greater than the length of second internal splines (731), second spring (30) have all the time and make external splines (201) block in the trend of second internal splines.

7. A DC reciprocating saw as defined in claim 4 wherein: be equipped with handle (61) on extension bar (6), be equipped with on handle (61) with motor (24) electric connection's power (62), still be equipped with handle (63) on extension bar (6).

8. A direct current reciprocating saw as defined in claim 1 wherein: and a sliding block (26) which is in sleeve fit with the reciprocating rod (23) is fixed in the mounting shell (21).

9. A direct current reciprocating saw as defined in claim 1 wherein: stop collar (45) has been cup jointed between stop collar (42) and centre gripping axle (41), stop collar (45) are fixed in on centre gripping axle (41), be equipped with on centre gripping axle (41) with stop collar (42) backstop complex bulge loop (413), the end that stop collar (45) keep away from bulge loop (413) is equipped with stop collar (42) backstop complex jump ring (46).

10. A direct current reciprocating saw as defined in claim 1 wherein: one end of the torsion spring (43) is hooked in the open slot (411), and a limit groove (422) for hooking the other end of the torsion spring (43) is formed in the limit sleeve (42).