CN211539725U

CN211539725U - Balance mechanism of scroll saw

Info

Publication number: CN211539725U
Application number: CN201922286594.8U
Authority: CN
Inventors: 张勤业; 李涛
Original assignee: Zhejiang Tongda Electrical Appliance Co ltd
Current assignee: Zhejiang Tongda Electrical Appliance Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-22
Anticipated expiration: 2029-12-18

Abstract

The utility model provides a scroll saw balance mechanism. The jig saw solves the problems that the eccentric gear in the jig saw can generate large vibration in the up-down direction in the process of driving the saw blade to move, so that the jig saw is easy to deviate in the moving process, materials needing to be sawn cannot meet the actual requirements, the saw blade impacting up and down can generate large impact force on the eccentric gear, and the service life of the eccentric gear is shortened. The utility model discloses a set up an eccentric block and make eccentric block's focus, eccentric gear's center, dwang three be in same straight line on eccentric gear, make the saw bit be located eccentric gear's highest point when the saw bit is in the below at the in-process of motion, eccentric block is located eccentric gear's lower when the saw bit is in the top, the direction of eccentric block centrifugal force is opposite with saw bit impact force direction, reduce the vibrations that saw bit reciprocating motion produced by a wide margin.

Description

Balance mechanism of scroll saw

Technical Field

The utility model belongs to the technical field of electric tool, in particular to scroll saw balance mechanism.

Background

A jig saw, especially a hand-held jig saw, is provided with a motor arranged in a machine body to drive a transmission mechanism so as to drive a saw blade to reciprocate to cut a workpiece, and a bottom plate is placed on the workpiece when the workpiece is cut. The operator pushes the jigsaw to move the shoe relative to the workpiece, thereby causing the saw blade to make a straight or curved cut.

In the in-service use process, because the saw bit is up-and-down motion at the motion mode, eccentric gear can produce great vibrations in the up-and-down direction at the in-process that drives the saw bit motion, lead to the sweep saw to take place the skew easily at the removal in-process and make the material that needs the saw reach the requirement of reality, the machine produces great vibrations, influence user experience, and the saw bit of upper and lower impact can produce a great impact force to eccentric gear, reduce eccentric gear's life, prior art exists and can improve the part.

Disclosure of Invention

The utility model discloses equipment is to foretell not enough, provides one kind and can carry out the sweep saw balance mechanism that cushions to the impact of saw blade.

The utility model provides a coping saw balance mechanism, fixed setting is in the casing, including rotor, positioning seat, eccentric gear and reciprocating lever, eccentric gear rotates and sets up on the positioning seat, positioning seat and eccentric gear engagement are passed to the one end of rotor, the fixed dwang that is provided with on the eccentric gear, the one end of dwang is inserted and is established on the reciprocating lever, seted up on the reciprocating lever one with reciprocating lever length direction vertically guide way, the dwang is located this guide way, its characterized in that, the fixed eccentric block that is provided with on the terminal surface of eccentric gear orientation reciprocating lever, the eccentric block is located one side of keeping away from the dwang on the eccentric gear orientation reciprocating lever terminal surface, the focus of eccentric block, the center of eccentric gear, dwang three are in same straight line.

Preferably, the rotating rod is rotatably provided with a shaft sleeve, and the diameter of the shaft sleeve is the same as the width of the guide groove.

Preferably, the length of the guide groove is larger than the diameter of the rotation of the shaft sleeve.

Preferably, the bottom of the shaft sleeve is fixedly provided with a circle of convex edge, and the diameter of the convex edge is larger than the width of the guide groove.

Preferably, the reciprocating rod is movably provided with two limiting sleeves, the two limiting sleeves are respectively positioned on two sides of the guide groove on the reciprocating rod, and the limiting sleeves are fixedly arranged on the shell.

Preferably, the reciprocating rod is provided with two limiting grooves matched with the limiting sleeves, and the length direction of the limiting grooves is the same as that of the reciprocating rod.

Preferably, a limiting rod is fixedly arranged on the limiting sleeve, and one end of the limiting rod is positioned in the limiting groove.

Preferably, the positioning seat is provided with an installation groove, a fixed rod is fixedly arranged in the installation groove, the eccentric gear is rotatably arranged on the fixed rod, the side wall of the installation groove is fixedly provided with a plurality of clamping blocks, and the periphery of the fixed rod is provided with an opening matched with the clamping blocks.

Preferably, the number of the openings and the number of the clamping blocks are two.

The utility model discloses a set up an eccentric block and make eccentric block's focus, eccentric gear's center, dwang three be in same straight line on eccentric gear, make the saw bit be located eccentric gear's highest point when the saw bit is in the below at the in-process of motion, eccentric block is located eccentric gear's lower when the saw bit is in the top, the direction of eccentric block centrifugal force is opposite with saw bit impact force direction, reduce the vibrations that saw bit reciprocating motion produced by a wide margin.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a front view of an eccentric gear

Fig. 3 is a cross-sectional view of the present invention.

In the figure: 1. a rotor; 2. positioning seats; 3. an eccentric gear; 4. a reciprocating lever; 5. rotating the rod; 6. a guide groove; 7. an eccentric block; 8. a shaft sleeve; 9. a convex edge; 10. a limiting sleeve; 11. a limiting groove; 12. a limiting rod; 13. mounting grooves; 14. a clamping block; 15. an opening; 16. and (5) fixing the rod.

Detailed Description

The following are specific embodiments of the device of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the device of the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, a curve saw balance mechanism is fixedly arranged in a shell and comprises a rotor 1, a positioning seat 2, an eccentric gear 3 and a reciprocating rod 4, the eccentric gear 3 is rotationally arranged on the positioning seat 2, one end of the rotor 1 penetrates through the positioning seat 2 to be meshed with the eccentric gear 3, a rotating rod 5 is fixedly arranged on the eccentric gear 3, one end of the rotating rod 5 is inserted on the reciprocating rod 4, the reciprocating rod 4 is provided with a guide groove 6 which is vertical to the length direction of the reciprocating rod 4, the rotating rod 5 is positioned in the guide groove 6, an eccentric block 7 is fixedly arranged on the end surface of the eccentric gear 3 facing the reciprocating rod 4, the eccentric block 7 is positioned on one side of the end surface of the eccentric gear 3 facing the reciprocating rod 4 and far away from the rotating rod 5, the gravity center of the eccentric block 7, the center of the eccentric gear 3 and the rotating rod 5 are positioned on the same straight line.

The dwang 5 is provided with a shaft sleeve 8 in a rotating manner, the diameter of the shaft sleeve 8 is the same as the width of the guide groove 6, and the length of the guide groove 6 is greater than the diameter of the shaft sleeve 8 in a rotating manner. The circular motion of with eccentric gear 3 changes the linear motion's of reciprocating lever 4 process more smoothly, the fixed protruding edge 9 that is provided with of round in bottom of axle sleeve 8, protruding diameter along 9 is greater than the width of above-mentioned guide way 6, makes reciprocating lever 4 compress tightly axle sleeve 8 on dwang 5 after the installation, avoids axle sleeve 8 to drop and breaks away from.

Two limiting sleeves 10 are movably arranged on the reciprocating rod 4, the two limiting sleeves 10 are respectively positioned on two sides of the guide groove 6 on the reciprocating rod 4, and the limiting sleeves 10 are fixedly arranged on the shell. Two limiting grooves 11 matched with the limiting sleeves 10 are formed in the reciprocating rod 4, and the length direction of the limiting grooves 11 is the same as that of the reciprocating rod 4. A limiting rod 12 is fixedly arranged on the limiting sleeve 10, and one end of the limiting rod 12 is positioned in the limiting groove 11. Ensuring that the reciprocating rod 4 moves on the linear distance of the stop collar 10.

As shown in fig. 3, an installation groove 13 is formed in the positioning seat 2, a fixing rod 16 is fixedly disposed in the installation groove 13, the eccentric gear 3 is rotatably disposed on the fixing rod 16, a plurality of clamping blocks 14 are fixedly disposed on a side wall of the installation groove 13, an opening 15 matched with the clamping blocks 14 is formed in the periphery of the fixing rod 16, the opening 15 and the clamping blocks 14 are respectively disposed in two numbers, so that the fixing rod 16 is ensured to be locked in the installation groove 13, and the fixing rod 16 is prevented from rotating to affect the rotation of the eccentric gear 3.

The saw bit is at the in-process of motion eccentric block 7 is located the highest place of eccentric gear 3 when the saw bit is in the below, and eccentric block 7 is located the lowest of eccentric gear 3 when the saw bit is in on the top, and the eccentric block 7 centrifugal force direction is opposite with the direction of saw bit impact force, reduces the vibrations that saw bit reciprocating motion produced by a wide margin, and balanced shock attenuation effect is better.

It is to be understood that in the claims, the description of the apparatus of the present invention, all "comprising … …" are to be understood in an open sense, i.e. in a sense equivalent to "comprising at least … …", and not in a closed sense, i.e. in a sense not to be understood as "comprising only … …".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the appended claims.

Claims

1. The utility model provides a bent saw balance mechanism, fixed setting is in the casing, including rotor (1), positioning seat (2), eccentric gear (3) and reciprocating lever (4), eccentric gear (3) rotate to set up on positioning seat (2), the one end of rotor (1) is passed positioning seat (2) and is engaged with eccentric gear (3), fixed dwang (5) of being provided with on eccentric gear (3), the one end of dwang (5) is inserted and is established on reciprocating lever (4), seted up one on reciprocating lever (4) and reciprocating lever (4) length direction vertically guide way (6), dwang (5) are located this guide way (6), its characterized in that, fixed eccentric gear (3) are provided with one eccentric block (7) on the terminal surface of reciprocating lever (4), eccentric block (7) are located one side of keeping away from (5) on eccentric gear (3) the terminal surface of reciprocating lever (4), the gravity center of the eccentric block (7), the center of the eccentric gear (3) and the rotating rod (5) are positioned on the same straight line.

2. A curve saw balance mechanism according to claim 1, characterized in that the turning rod (5) is provided with a bushing (8) in a turning manner, the diameter of the bushing (8) being the same as the width of the guide groove (6).

3. A curve saw balance mechanism according to claim 2, characterized in that the length of the guide groove (6) is larger than the diameter of the bushing (8) in rotation.

4. A curve saw balance mechanism according to claim 3, characterized in that the bottom of the bushing (8) is fixedly provided with a ring of beads (9), the diameter of the beads (9) being larger than the width of the guide groove (6).

5. The curve saw balance mechanism according to claim 1, wherein two stop sleeves (10) are movably arranged on the reciprocating rod (4), the two stop sleeves (10) are respectively positioned at two sides of the guide groove (6) on the reciprocating rod (4), and the stop sleeves (10) are fixedly arranged on the shell.

6. The curve saw balance mechanism according to claim 5, wherein the reciprocating rod (4) is provided with two limiting grooves (11) matched with the limiting sleeves (10), and the length direction of the limiting grooves (11) is the same as that of the reciprocating rod (4).

7. The balance mechanism of the jigsaw according to claim 6, wherein a stop rod (12) is fixedly arranged on the stop sleeve (10), and one end of the stop rod (12) is located in the stop groove (11).

8. The balance mechanism of a jigsaw according to claim 1, wherein the positioning seat (2) is formed with an installation groove (13), the installation groove (13) is internally and fixedly provided with a fixing rod (16), the eccentric gear (3) is rotatably arranged on the fixing rod (16), the side wall of the installation groove (13) is fixedly provided with a plurality of blocks (14), and the fixing rod (16) is formed with an opening (15) at the periphery thereof for matching with the blocks (14).

9. The curve saw balance mechanism according to claim 8, wherein two openings (15) and two blocks (14) are provided.