CN221891029U - Reciprocating power tools - Google Patents

Abstract

The utility model relates to a reciprocating electric tool, which comprises a shell, a motor assembly arranged in the shell, a transmission assembly connected with the motor assembly, a reciprocating rod driven by the transmission assembly and a cutter lifting assembly connected with the transmission assembly, wherein the reciprocating rod drives a saw blade to reciprocate in the up-down direction; the reciprocating power tool also includes a truing mechanism driven by the lift bar, the truing mechanism including a blade assembly contacting a surface of the workpiece, the blade assembly being located on an underside of the guide wheel. According to the utility model, the shaping mechanism is arranged on the curve saw, so that the saw blade performs sawing operation and simultaneously performs burr treatment on the surface of a workpiece, burrs generated in the sawing process are eliminated, and the smoothness of a cutting surface is maintained; in addition, the shaping mechanism is developed and designed on the basis of the cutter lifting assembly, namely, the existing cutter lifting rod is utilized to drive the shaping mechanism to move, so that the structure is ingenious, and the structure of the curve saw is more compact.

Description

Reciprocating power tools

[Technical field]

The utility model relates to the technical field of electric tools, in particular to a reciprocating electric tool used in occasions such as decoration and construction.

[Background technology]

Reciprocating saws and jigsaws are common among reciprocating power tools. They are used to cut wood, plastic and other materials and are widely used in home furnishing, decoration and other fields. In actual work, the motion conversion mechanism of reciprocating power tools converts the rotational motion of the motor assembly into the reciprocating motion of the reciprocating rod to drive the saw blade to perform high-frequency cutting operations.

In order to prevent burrs from being generated during cutting, existing reciprocating electric tools add a pressure plate to the bottom plate and press the pressure plate against the surface of the workpiece to reduce the generation of burrs. However, the pressure plate can only reduce the generation of burrs to a certain extent. During the cutting process, burrs will still be generated on the cutting surface due to factors such as the uneven surface of the workpiece.

In view of this, it is indeed necessary to provide an improved reciprocating electric tool to overcome the defects of the prior art.

[Utility Model Content]

In view of the deficiencies in the prior art, the utility model aims to provide a reciprocating electric tool that can remove burrs efficiently.

The utility model can solve the problems of the prior art by adopting the following technical solutions: a reciprocating electric tool equipped with a saw blade, the reciprocating electric tool comprising a casing, a motor assembly installed in the casing, a transmission assembly connected to the motor assembly, a reciprocating rod driven by the transmission assembly and a knife lifting assembly connected to the transmission assembly, the reciprocating rod drives the saw blade to reciprocate in the up and down directions, the knife lifting assembly comprises a knife lifting rod connected to the transmission assembly, a guide wheel bracket driven by the knife lifting rod and a guide wheel installed on the guide wheel bracket, the guide wheel abuts against the saw blade; the reciprocating electric tool also comprises a shaping mechanism driven by the knife lifting rod, the shaping mechanism comprises a blade assembly contacting the surface of the workpiece, and the blade assembly is located on the lower side of the guide wheel.

A further improvement is as follows: the knife lifting assembly includes a guide pin connected between the knife lifting rod and the guide wheel bracket, the shaping mechanism includes a drive plate located on the opposite side of the blade assembly, and the guide pin drives the drive plate and the guide wheel bracket to move at the same time.

A further improved solution is: the drive plate includes a through hole, the guide pin includes a guide pin body, and the lower end of the guide pin body extends through the through hole and abuts against the drive surface of the guide wheel bracket.

A further improved solution is: the guide pin includes a shaft portion penetrating the guide pin body, and the shaft portion abuts against the upper surface of the drive plate.

A further improved solution is: the knife lifting assembly includes a pivot passing through the guide wheel bracket, and the driving surface and the guide wheel are located on both sides of the pivot.

A further improved solution is: the shaping mechanism includes a connecting plate rotatably connected to the pivot, and the blade assembly is installed at the lower end of the connecting plate.

A further improvement is as follows: the guide wheel bracket includes a pair of side walls extending from the lower end of the driving surface toward the guide wheel, the connecting plate is located between the pair of side walls, and a connecting pin extends through the pair of side walls and the guide wheel to rotatably connect the guide wheel to the guide wheel bracket.

A further improved solution is: the connecting plate includes an avoidance section arranged between the pivot and the blade assembly, the avoidance section forms a concave avoidance area, and the guide wheel at least partially extends into the avoidance area.

A further improved solution is: the guide wheel bracket includes a slot that passes through the driving surface, and the shaping mechanism includes an intermediate plate connecting the driving plate and the connecting plate, and the intermediate plate extends through the slot.

Compared with the prior art, the utility model has the following beneficial effects: by arranging a shaping mechanism on the jig saw, the surface of the workpiece is burred while the saw blade is sawing, and the burrs generated during the sawing process are eliminated, which is conducive to keeping the cutting surface smooth; in addition, the shaping mechanism is developed and designed on the basis of the knife lifting assembly, that is, the existing knife lifting rod is used to drive the shaping mechanism to move, which has an ingenious structure and also makes the structure of the jig saw more compact. The connecting plate is arranged between a pair of side walls, and an avoidance section and an avoidance area formed by the avoidance section are arranged on the connecting plate, which further makes the structure of the jig saw more compact.

【Brief Description of the Drawings】

FIG1 is a schematic structural diagram of a reciprocating electric tool according to a preferred embodiment of the utility model;

FIG2 is a schematic diagram of the structure of a driving component in the reciprocating electric tool shown in FIG1 ;

FIG3 is a schematic diagram of the connection between the knife lifting assembly and the shaping mechanism in the driving component shown in FIG2 ;

FIG. 4 is a schematic structural diagram of a transmission gear in the driving component shown in FIG. 2 .

[Specific implementation method]

The utility model is further described in detail below in conjunction with the accompanying drawings and implementation modes.

The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "back", "left", "right", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device/element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Referring to FIG. 1 , a preferred embodiment of the reciprocating electric tool of the present invention relates to a jigsaw 100 on which a saw blade 200 is detachably mounted for sawing wood, plastic, etc. The jigsaw 100 comprises a housing 1, a driving component mounted in the housing 1, a base 7 connected to the lower end of the housing 1, a control component disposed in the housing 1, and a switch component 9 mounted on the housing 1, wherein the driving component and the switch component 9 are respectively connected to the control component.

Please refer to FIG. 2 , the driving components include a motor assembly 2 installed in a housing 1, a transmission assembly 3 connected to the motor assembly 2, a knife lifting assembly 6 connected to the transmission assembly 3, a reciprocating rod 4 driven by the transmission assembly 3, and a clamping mechanism 5 disposed at the lower end of the reciprocating rod 4. The saw blade 200 is detachably mounted on the clamping mechanism 5. The motor assembly 2 drives the reciprocating rod 4 to move via the transmission assembly 3, thereby driving the saw blade 200 to reciprocate in the up and down directions. At the same time, the movement of the transmission assembly 3 also drives the knife lifting assembly 6 to move, so as to drive the saw blade 200 to swing. The knife lifting assembly 6 can improve the working efficiency of the saw blade 200 during the sawing process.

Preferably, the clamping mechanism 5 has a quick clamping function, which can be a one-hand quick clamp or a two-hand quick clamp, so that the user can conveniently disassemble and assemble the saw blade 200 without tools.

Please refer to Figure 1, the above-mentioned housing 1 includes a gripping portion 11 for a user to grasp, a main shell 12 that accommodates a motor assembly 2, a transmission assembly 3 and a reciprocating rod 4, and a battery pack mounting portion 13 connected to the gripping portion 11 and the rear end of the main shell 12. The gripping portion 11 and the main shell 12 are spaced apart to form a space 14 for the user's hand to be placed.

Furthermore, the above-mentioned switch assembly 9 is installed on the holding part 11, and the switch assembly 9 is provided with a switch trigger for triggering the motor assembly 2; the battery pack (not shown) that provides energy for the motor assembly 2 is detachably installed on the battery pack installation part 13, and the control assembly is arranged on the rear side of the motor assembly 2 and extends to the battery pack installation part 13.

Furthermore, the control component is electrically connected between the battery pack and the motor component 2, and controls the discharge of the battery pack to the motor component 2, and the switch component 9 is also electrically connected to the control component.

Please refer to Figures 2 and 3, the above-mentioned transmission assembly 3 includes a transmission gear 31 meshed with the motor teeth 21 of the motor assembly 2, a crank pin 32 installed on the transmission gear 31 and a counterweight 33 installed on the transmission gear 31, and the reciprocating rod 4 is connected to the crank pin 32 and moves up and down under the action of the crank pin 32.

Furthermore, the transmission gear 31 has a cylindrical transmission body 311, an eccentric block 312 protruding from the end face of the transmission body 311, and an eccentric portion 313 protruding from the end face of the eccentric block 312. A tooth shape 3111 is provided on the outer periphery of the transmission body 311. The transmission body 311 is externally meshed with the motor teeth 21 of the motor assembly 2 via the tooth shape 3111. The eccentric block 312 is installed in the elliptical hole of the counterweight 33 to drive the counterweight 33 to move up and down. The motor teeth 21 drive the transmission gear 31 to move, and drive the counterweight 33 and the reciprocating rod 4 to reciprocate in opposite directions.

Furthermore, the knife lifting assembly 6 is connected to the eccentric portion 313 , and the movement of the transmission gear 31 will also drive the movement of the knife lifting assembly 6 .

In this embodiment, the reciprocating rod 4 is located at the front end of the transmission assembly 3 and is installed in the box cover of the transmission assembly 3 .

In this embodiment, the reciprocating rod 4 is arranged substantially perpendicular to the axis of the motor assembly 2 .

Please refer to FIG. 1 . The base 7 is substantially in the shape of a rectangular plate and has a flat bottom surface. The bottom surface abuts against the processed surface of the workpiece during the cutting operation. The saw blade 200 protrudes from the lower surface of the base 7 to process the workpiece.

Please refer to Figures 2 to 4, the above-mentioned knife lifting assembly 6 includes a knife lifting rod 61 connected to the transmission assembly 3, a guide wheel bracket 63 driven by the knife lifting rod 61, a guide pin 62 connected between the knife lifting rod 61 and the guide wheel bracket 63, a guide wheel 64 installed on the guide wheel bracket 63 and a pivot 66 passing through the guide wheel bracket 63, the guide wheel bracket 63 pivots around the pivot 66, and the guide wheel 64 abuts against the saw blade 200.

In this embodiment, the knife lifting rod 61 is sleeved on the eccentric portion 313 of the transmission gear 31 .

The working principle of the knife lifting assembly 6 is as follows: the transmission gear 31 rotates under the action of the motor assembly 2, and drives the knife lifting rod 61 to reciprocate up and down through the eccentric part 313 thereon, and the lower end 611 of the knife lifting rod 61 acts on the upper end of the guide pin 62, and the lower end of the guide pin 62 abuts against the driving surface 631 of the guide wheel bracket 63, and uses the lever principle to control the guide wheel 64 at the other end to be intermittently lifted, driving the saw blade 200 to jump and lift the knife continuously during the cutting process to improve the cutting efficiency.

In this embodiment, the driving surface 631 and the guide wheel 64 are located on both sides of the pivot 66. Further, the guide wheel bracket 63 includes a pair of side walls 632 extending from the lower end of the driving surface 631 toward the guide wheel 64, and a connecting pin 65 extends through the pair of side walls 632 and the guide wheel 64 to rotatably connect the guide wheel 64 to the guide wheel bracket 63.

In this embodiment, the guide wheel 64 includes a contact ring for abutting against the saw blade 200. The contact ring is a circular disk with a groove in the middle. The saw blade 200 extends to the groove and moves along the groove.

Please refer to FIG. 2 and FIG. 3 , the jig saw 100 further includes a shaping mechanism 8 driven by a knife lifting rod 61, the shaping mechanism 8 includes a blade assembly 88 contacting the workpiece surface, a driving plate 81 located on the opposite side of the blade assembly 88, a connecting plate 83 rotatably connected to the pivot 66, and an intermediate plate 82 connecting the driving plate 81 and the connecting plate 83, the blade assembly 88 is mounted on the lower end of the connecting plate 83 and the blade assembly 88 is located on the lower side of the guide wheel 64. Similar to the principle of knife lifting, the driving plate 81 drives the connecting plate 83 to pivot around the pivot 66 under the action of the knife lifting rod 61, and uses the lever principle to control the lower end of the blade assembly 88 to intermittently contact the workpiece surface for cutting or control the blade assembly 88 to retreat. By providing a shaping mechanism 8 on the curved saw 100, the surface of the workpiece is deburred while the saw blade 200 is sawing, thereby eliminating the burrs generated during the sawing process, which is beneficial to maintaining the smoothness of the cutting surface; in addition, the shaping mechanism 8 is developed and designed on the basis of the knife lifting assembly 6, that is, the existing knife lifting rod 61 is used to drive the shaping mechanism 8 to move, which has an ingenious structure and also makes the structure of the curved saw 100 more compact.

In this embodiment, the knife lifting rod 61 drives the driving plate 81 and the guide wheel bracket 63 to move simultaneously through the guide pin 62. Specifically, the driving plate 81 includes a through hole 811, and the guide pin 62 includes a guide pin body 621 and a shaft portion 622 penetrating the guide pin body 621. The lower end of the guide pin body 621 extends through the through hole 811 and abuts against the driving surface 631 of the guide wheel bracket 63, and the shaft portion 622 abuts against the upper surface of the driving plate 81 through an additional portion protruding from the guide pin body 621.

In this embodiment, the guide wheel bracket 63 includes a slot 633 penetrating the driving surface 631 , and the intermediate plate 82 extends through the slot 633 . Further, a pair of intermediate plates 82 is provided, and the pair of intermediate plates 82 extends from both sides of the through hole 811 .

Please refer to FIG. 2 , the connecting plate 83 is located between a pair of side walls 632 , so that the structure of the jigsaw 100 is more compact.

In this embodiment, the connecting plate 83 includes an escape section 831 disposed between the pivot 66 and the blade assembly 88. The escape section 831 forms a concave escape area 832. The guide wheel 64 at least partially extends into the escape area 832, further making the structure of the jig saw 100 compact.

The utility model provides a shaping mechanism 8 on the jig saw 100, and while the saw blade 200 is sawing, the surface of the workpiece is deburred, and the burrs generated during the sawing process are eliminated, which is conducive to keeping the cutting surface smooth; in addition, the shaping mechanism 8 is developed and designed on the basis of the knife lifting assembly 6, that is, the existing knife lifting rod 61 is used to drive the shaping mechanism 8 to move, which is a clever structure and also makes the structure of the jig saw 100 more compact. The connecting plate 83 is provided between a pair of side walls 632, and an avoidance section 831 and an avoidance area 832 formed by the avoidance section 831 are provided on the connecting plate 83, which further makes the structure of the jig saw 100 more compact.

The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many other alternatives to the reciprocating power tool of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims (9)

1. A reciprocating electric tool equipped with a saw blade, the reciprocating electric tool comprising a casing, a motor assembly installed in the casing, a transmission assembly connected to the motor assembly, a reciprocating rod driven by the transmission assembly and a knife lifting assembly connected to the transmission assembly, the reciprocating rod drives the saw blade to reciprocate in the up and down directions, the knife lifting assembly comprises a knife lifting rod connected to the transmission assembly, a guide wheel bracket driven by the knife lifting rod and a guide wheel mounted on the guide wheel bracket, the guide wheel abuts against the saw blade; it is characterized in that: the reciprocating electric tool also includes a shaping mechanism driven by the knife lifting rod, the shaping mechanism includes a blade assembly contacting the surface of a workpiece, and the blade assembly is located on the lower side of the guide wheel. 2. The reciprocating power tool according to claim 1 is characterized in that: the blade lifting assembly includes a guide pin connected between the blade lifting rod and the guide wheel bracket, the shaping mechanism includes a drive plate located on the opposite side of the blade assembly, and the guide pin drives the drive plate and the guide wheel bracket to move at the same time. 3. The reciprocating electric tool according to claim 2, characterized in that: the drive plate includes a through hole, the guide pin includes a guide pin body, and the lower end of the guide pin body extends through the through hole and abuts against the driving surface of the guide wheel bracket. 4 . The reciprocating electric tool according to claim 3 , wherein the guide pin comprises a shaft portion penetrating through the guide pin body, and the shaft portion abuts against an upper surface of the driving plate. 5. The reciprocating electric tool according to claim 4, characterized in that the knife lifting assembly comprises a pivot passing through the guide wheel bracket, and the driving surface and the guide wheel are located on both sides of the pivot. 6. The reciprocating electric tool according to claim 5, wherein the shaping mechanism comprises a connecting plate rotatably connected to the pivot, and the blade assembly is mounted on the lower end of the connecting plate. 7. The reciprocating power tool according to claim 6 is characterized in that: the guide wheel bracket includes a pair of side walls extending from the lower end of the driving surface toward the guide wheel, the connecting plate is located between the pair of side walls, and a connecting pin extends through the pair of side walls and the guide wheel to rotatably connect the guide wheel to the guide wheel bracket. 8. The reciprocating power tool according to claim 7, characterized in that the connecting plate includes an avoidance section arranged between the pivot and the blade assembly, the avoidance section forms a concave avoidance area, and the guide wheel at least partially extends into the avoidance area. 9. The reciprocating power tool according to claim 8, characterized in that: the guide wheel bracket includes a slot passing through the driving surface, the shaping mechanism includes an intermediate plate connecting the driving plate and the connecting plate, and the intermediate plate extends through the slot.