# US 10,478,906 B2 · Duplex saw

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- Number: US 10,478,906 B2
- Document ID: US10478906B2
- Status: Granted
- Kind: B2
- Application number: 15/766,547
- Filed: 2017-01-12
- Published: 2018-10-18
- Granted: 2019-11-19
- Earliest claimed: 2016-09-20
- Assignees: Zhengyang Industry & Investment Co., Ltd.
- Applicants: Zhengyang Industry & Investment Co., Ltd.
- Inventors: Kesong Xu
- Web page: https://patentgrep.com/patent/US10478906B2

## CPC

- B23D 45/065: {with the saw blade carried by a pivoted lever}
- B23D 45/04: with a circular saw blade or the stock carried by a pivoted lever
- B23D 47/12: of drives for circular saw blades
- B23D 59/0062: {by blowing}
- B27B 5/165: {Convertible sawing devices}
- B27B 9/02: Arrangements for adjusting the cutting depth or the amount of tilting
- B27G 19/04: for manually-operated power-driven circular saws
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)
- B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01)
- B27G: ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS (tools for grinding B24D; sawing tools B27B33/00; tools for slotting or mortising machines B27F5/02; tools for the manufacture of wood shavings, chips, powder or the like B27L11/00); SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS

## Abstract

A duplex saw, including a machine head assembly of which a top portion is mounted with a cutting working platform, a base, a rotating disk, and a machine head rotating seat positioned between the machine head assembly and the rotating disk and hinged with the machine head assembly and the rotating disk. The machine head assembly includes a motor, a machine frame, a gear box body, a transmission mechanism and a saw blade. The motor is fixed on the machine frame. The transmission mechanism is provided in the gear box body and constitutes a gear box assembly. A gear shaft of the motor drives the transmission mechanism. The gear box assembly can be rotated about the gear shaft of the motor. The blade is fixed on an output shaft of the transmission mechanism, the output shaft and the gear shaft of the motor are parallel to each other.

## Claims

### Claim 1

A duplex saw, comprising a machine head assembly of which a top portion is mounted with a cutting working platform, a base, a rotating disk, and a machine head rotating seat positioned between the machine head assembly and the rotating disk and hinged with the machine head assembly and the rotating disk respectively, wherein the machine head assembly comprises a motor, a machine frame, a gear box body, a transmission mechanism and a saw blade, the motor is fixed on the machine frame, the transmission mechanism is provided in the gear box body and constitutes a gear box assembly, a gear shaft of the motor drives the transmission mechanism to be rotated, the saw blade is fixed on an output shaft of the transmission mechanism, the output shaft and the gear shaft of the motor are parallel to each other;
wherein the gear box body is provided thereon with a rotating sleeve connected to a handle, the machine frame is provided thereon with a rotating seat, so that upon operation of the handle the rotating sleeve rotates relative to the rotating seat.

### Claim 2 (depends on 1)

The duplex saw according to claim 1, wherein the gear box body is provided thereon with a conversion shield, the conversion shield is positioned above the saw blade during inclined cutting, the conversion shield is positioned under the saw blade during cutting.

### Claim 3 (depends on 1)

The duplex saw according to claim 1, wherein a center shaft sleeve of the rotating seat is provided with a gear box pinch plate and a machine frame pinch plate which are mutually rotatable, the machine frame pinch plate is fixed on the machine frame and blocks the gear box pinch plate, the gear box pinch plate is fixed on the gear box body and blocks the machine frame pinch plate.

### Claim 4

A duplex saw, comprising a machine head assembly of which a top portion is mounted with a cutting working platform, a base, a rotating disk, and a machine head rotating seat positioned between the machine head assembly and the rotating disk and hinged with the machine head assembly and the rotating disk respectively, wherein the machine head assembly comprises a motor, a machine frame, a gear box body, a transmission mechanism and a saw blade, the motor is fixed on the machine frame, the transmission mechanism is provided in the gear box body and constitutes a gear box assembly, a gear shaft of the motor drives the transmission mechanism to be rotated, the saw blade is fixed on an output shaft of the transmission mechanism, the output shaft and the gear shaft of the motor are parallel to each other;
wherein the machine frame is provided thereon with a locking mechanism for locking the gear box assembly, the locking mechanism comprises a locking wrench and a locking platen, the locking wrench passes through the machine frame and is mutually connected with the locking platen, the locking platen clamps tightly the gear box body via the machine frame.

### Claim 5 (depends on 4)

The duplex saw according to claim 4, wherein the saw blade has a first side and a second side, each side is coupled to a shield which are fixed with the machine frame and provided with a dust collecting channel at a rear portion thereof, the shields are provided with a dust guiding hinged plate therebetween, a conversion shield constitutes a dust removing structure with the dust collecting channel via the dust guiding hinged plate during cutting.

### Claim 6 (depends on 5)

The duplex saw according to claim 5, wherein the transmission mechanism comprises an output gear and a middle gear which are mutually meshed with each other, the output gear is provided on the output shaft, the middle gear is provided on a middle shaft, the gear shaft of the motor is meshed with the middle gear.

### Claim 7 (depends on 5)

The duplex saw according to claim 5, wherein the gear box assembly is provided thereon with a handle for selectively converting the duplex saw between cutting and inclined cutting.