CN109318297B

CN109318297B - Bench saw

Info

Publication number: CN109318297B
Application number: CN201811361107.3A
Authority: CN
Inventors: 张庆奇; 张春元; 朱金宝; 金传国
Original assignee: Jiangsu Jinfeida Power Tools Co Ltd
Current assignee: Jiangsu Jinfeida Power Tools Co Ltd
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2023-09-15
Anticipated expiration: 2038-11-15
Also published as: CN109318297A

Abstract

The invention discloses a bench saw, which comprises a machine body, a motor, a saw blade and a lifting assembly, wherein the machine body is provided with a lifting mechanism; the saw blade is arranged on a shaft of the motor, the motor is arranged on the lifting assembly, and the machine body is provided with a lifting opening; the device is characterized in that a pair of left and right opposite protection plates are arranged at the lifting opening of the machine body at one side of the saw blade, the left and right opposite protection plates are pushed open by the motor when the motor is in an up-going state, the left and right opposite protection plates are in an open state, and the motor is driven by an elastic mechanism to restore to a closed state when the motor is in a down-going state; and a guiding notch is arranged on one side of the left and right protection plates, which is close to the motor. The opening and closing of the protection plate are more stable and the service life is long; the protection plate can keep linear sliding when being opened and closed, so that the movement of the protection plate is stable.

Description

Bench saw

Technical Field

The invention relates to an electric tool, in particular to a table saw.

Background

The table saw is one of the main electric tools for wood processing, and the working principle of the table saw is that a motor drives a saw blade to rotate so as to cut wood. Since the saw blade is a sharp metal object, the saw blade should be protected both from exposure to the work surface and from below the surface, both with respect to operator protection and in accordance with safety regulations.

When the table saw is not used, the saw blade needs to be completely hidden below the working table surface, and as the saw blade is arranged on the shaft of the motor, a lifting opening is reserved in the machine body for lifting of the motor, when the saw blade is completely lowered below the working table surface, an operator can touch the saw teeth of the saw blade from the lifting opening, so that personnel injury is caused, and huge potential safety hazards exist. The bench saw seen in the market at present is generally characterized in that cloth materials are arranged on a machine body at the upper part of the lifting opening for shielding, and the cloth materials are not only easy to damage but also have low safety coefficient.

Disclosure of Invention

The invention aims to: the invention aims to provide a bench saw which is stable in work, safe and long in service life.

The technical scheme is as follows: the bench saw comprises a machine body, a motor, a saw blade and a lifting assembly; the saw blade is arranged on a shaft of the motor, the motor is arranged on the lifting assembly, and the machine body is provided with a lifting opening; the lifting opening of the saw blade is provided with a pair of left and right opposite protection plates, the left and right opposite protection plates are pushed open by the motor when the motor is in an up-going state, the left and right opposite protection plates are in an open state and are driven by the elastic mechanism to restore to a closed state when the motor is in a down-going state, and one side of the left and right opposite protection plates, which is close to the motor, is provided with a guide notch. The elastic mechanism is a spring, and a spring groove for placing the spring is formed in the machine body; the protection plates are provided with bulges which are inserted into the spring grooves, the springs are pressed between the bulges of the spring grooves, and the protection plates which are opposite left and right are in a closed state under the driving of the corresponding springs. The protection plate is provided with a strip-shaped groove along the moving direction, and a guide pin matched with the strip-shaped groove is arranged on the machine body.

By adopting the technical scheme, an operator drives the lifting assembly, and the motor moves up and down under the drive of the lifting assembly; when the motor goes up, the motor rises along the lifting opening, enters the guide notch formed by the protection plate, then contacts with the protection plate, finally opens the protection plate at the left side and the right side, and the protection plate is in a completely opened state when the motor reaches the highest point. The guiding notch is a narrowing notch from bottom to top, when the motor descends, the spring pushes the protrusion of the protection plate, the strip-shaped groove of the protection plate slides along the guiding pin, the protection plates are gradually close to each other, and after the motor is completely separated from the guiding notch, the protection plate is in a closed state. The protrusion of the protection plate slides along the spring groove, and the bar-shaped groove of the protection plate slides along the guide pin, so that the movement mode provides a stable movement direction for the protection plate, and the stability of the movement of the protection plate is maintained.

Considering that the guard plate is only positioned and limited in the moving direction when moving, in order to prevent the guard plate from separating from the machine body, the guide pin outwards extends through the strip-shaped groove, a stop block for limiting the guard plate from falling off is arranged at the tail end of the guide pin, the stop block adopts a bolt, the diameter of a nut of the bolt is larger than the width of the strip-shaped groove, and the nut abuts against the strip-shaped groove, so that the separation of the guard plate is effectively limited.

The guard plate is made of an aluminum alloy material, and is always attached to the motor under the action of the spring, and meanwhile, the edge of the guard plate is thinner, so that the guard plate is considered to generate huge abrasion to the motor due to the fact that the thin edge of the guard plate can deform in the use process, and meanwhile, the abrasion of the guard plate is very severe.

The beneficial effects are that: the protection plate belongs to a rigid part relative to cloth materials, and is not easy to pass through; the protection plate is limited in two directions, and can keep good stability when being opened and closed; the contact area of the protection plate and the motor is increased, and the abrasion of the protection plate reduces the service life of the protection plate.

Drawings

FIG. 1 is a schematic view of the structure of the table saw motor of the present invention;

FIG. 2 is a schematic view of the structure at the saw blade of the table saw of the present invention;

fig. 3 is a schematic structural view of the shielding plate of the present invention.

Detailed Description

As shown in fig. 1 to 3, a table saw includes a body 1, a motor 2, a saw blade 3 (transparent arrangement), a lifting assembly 4 and a table, the table is mounted on the top of the body 1, the motor 2 is mounted on the lifting assembly 4, the body 1 is provided with a lifting opening, a shaft of the motor 2 passes through the lifting opening, the saw blade 3 is fixed on the shaft of the motor 2, the motor 2 moves up and down under the driving of the lifting assembly 4, and the saw blade 3 is exposed out of the table along with the lifting of the motor 2 or is completely hidden below the table. When the motor 2 is located at the bottom of the lifting opening, the saw blade 3 is completely hidden below the workbench, and at this time, no motor 2 is used for shielding the lifting opening to expose the saw blade 3, therefore, a pair of left and right opposite protection plates 5 are arranged at the lifting opening position of the machine body 1 at one side of the saw blade 3, and when the motor 2 is located at the upper side, the left and right opposite protection plates 5 are jacked by the shaft of the motor 2, and the left and right opposite protection plates 5 are in an open state. In order to facilitate the shaft of the motor 2 to open the protection plate 5 to the left and right sides, a guiding notch 7 is arranged on one side of the protection plate 5 which is opposite to the left and right and is close to the motor 2, the guiding notch 7 is a narrowed opening from bottom to top, when the motor 2 goes up, the shaft of the motor 2 gradually butts against the guiding notch 7 of the protection plate 5, and then the protection plate 5 is gradually pushed to the left and right sides. Wherein the length of the strip groove 52 on the protection plate 5 is not less than the maximum distance of the left and right movement of the protection plate 5. Thus being applicable to different types of table saws.

The left and right opposite protection plates 5 are in a closed state under the drive of the elastic mechanism when the motor 2 is in a downward direction. The elastic mechanism is a spring 6, and a spring groove 8 for placing the spring 6 is arranged on the machine body 1; the protection plate 5 is provided with a protrusion 51, the protrusion 51 is inserted into the spring groove 8, and is compressed between the spring groove 8 and the protrusion 51. The protection plate 5 is provided with a bar-shaped groove 52 along the moving direction, and the machine body 1 is provided with a guide pin 9 matched with the bar-shaped groove 52. The protrusions 51 of the shielding plate 5 are pushed by the corresponding springs 6, the protrusions 51 of the shielding plate 5 slide along the spring grooves 8, and the bar grooves 52 of the shielding plate 5 slide along the guide pins 9, so that the movement of the shielding plate 5 is more stable.

Meanwhile, in order to keep the left and right protection plates 5 in the closed state to be only contacted with each other, the guide pins 9 are used for abutting against the protrusions 51, and the guide pins 9 adjust the sliding distance of the protection plates 5 by adjusting the positions of the abutting against the protrusions 51, so that the situation that the protection plates 5 are mutually extruded due to the overlapping of the positions of the protection plates 5 and the protection plates 5 are separated from the machine body 1 is avoided. In order to further prevent the shielding plate 5 from being separated from the machine body 1, the guide pin 9 is provided with a stopper 10, the stopper 10 is preferably a bolt, the nut outer diameter of the bolt is larger than the width of the strip-shaped groove 52, the nut abuts against the shielding plate 5, and the bolt is used for preventing the protrusion 51 of the shielding plate 5 from being separated from the spring groove 8 and the shielding plate 5 from being separated from the machine body 1.

The guard plate 5 is made of an aluminum alloy material, and is always attached to the shaft of the motor 2 under the action of the spring 6, and meanwhile, the edge of the guard plate 5 is thinner, so that the thin edge of the guard plate 5 which is deformed in the use process is considered to generate huge abrasion to the shaft of the motor 2, and meanwhile, the abrasion of the guard plate 5 is also very serious, so that the service lives of the guard plate 5 and the shaft of the motor 2 are prolonged, the contact area of the guard plate 5 and the shaft of the motor 2 is increased by the folded surface 11, and the abrasion speed of the guard plate 5 and the shaft of the motor 2 is reduced.

Claims

1. A bench saw comprises a machine body (1), a motor (2), a saw blade (3) and a lifting assembly (4); the saw blade (3) is arranged on the shaft of the motor (2), the motor (2) is arranged on the lifting assembly (4), and the machine body (1) is provided with a lifting opening; the lifting device is characterized in that a pair of left and right opposite protection plates (5) are arranged at the lifting opening position of one side of the machine body (1), the left and right opposite protection plates (5) are pushed away by the motor (2) when the motor (2) is arranged upwards, the left and right opposite protection plates (5) are in an open state, and the motor (2) is driven by an elastic mechanism to restore to a closed state when the motor (2) is arranged downwards; a guide notch (7) is arranged at one side of the left and right opposite protection plates (5) close to the motor (2); the machine also comprises an elastic mechanism which is a spring (6), and a spring groove (8) for placing the spring (6) is arranged on the machine body (1); the protection plate (5) is provided with a bulge (51), the bulge (51) is inserted into the spring groove (8), the spring (6) is pressed between the spring groove (8) and the bulge (51), the protection plate (5) which is opposite left and right is in a closed state under the driving of the corresponding spring (6), the protection plate (5) is provided with a strip groove (52) along the moving direction, the machine body (1) is provided with a guide pin (9) matched with the strip groove (52), and the notch part of the protection plate (5) which is opposite left and right is provided with a folding surface (11) which extends inwards or outwards vertically.

2. Table saw according to claim 1, characterized in that the guide pin (9) extends outwards through the bar-shaped slot (52) and is provided at its end with a stop (10) for limiting the fall-off of the protection plate (5).