Reciprocating saw

Patent metadata

Field	Value
Publication number	US-12138697-B2
Application number	US-202117500068-A
Country	US
Kind code	B2
Filing date	Oct 13, 2021
Priority date	Oct 16, 2020
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A reciprocating saw includes a housing; a functional assembly including a motor supported by the housing; a sliding rod for connecting and driving the saw blade; a transmission mechanism connecting the motor and the sliding rod for driving the sliding rod to reciprocate. The reciprocating saw further includes a connecting device configured to rotatably connect the functional assembly to the housing and a buffer arranged between the functional component and the housing.

First claim

What is claimed is:

1. A reciprocating saw, comprising:
an outer housing;
a functional assembly accommodated within the outer housing, the functional assembly comprising:
a motor supported by the outer housing with the motor spaced from an inside surface of the outer housing;
a sliding rod operably coupled to the motor and configured to connect to and drive a saw blade extending from the outer housing; and
a transmission mechanism connecting the motor and the sliding rod, the transmission configured to drive the sliding rod to reciprocate; and

a connecting device rotatably coupling the functional assembly to the outer housing, such that the functional assembly is rotatable relative to the outer housing about the connecting device allowing for an orbital movement of the saw blade,
a buffer coupled between the functional assembly and the outer housing,
wherein the functional assembly is rotatable relative to the outer housing about a first straight line and the first straight line is perpendicular to a cutting plane of the reciprocating saw.

2. The reciprocating saw of claim 1 , wherein the transmission mechanism comprises a transmission gear driven to rotate by the motor, a counterweight coupled to the transmission gear, and a first eccentric structure connecting the sliding rod and the transmission gear, the transmission gear drives the sliding rod to reciprocate along a first direction and a second direction through the first eccentric structure, and the counterweight moves in the second direction opposite to the first direction when the sliding rod moves in the first direction.

3. The reciprocating saw of claim 2 , wherein the buffer comprises an elastically deformable material arranged at least in a second straight line which is perpendicular to the first straight line when the reciprocating saw is in operation.

4. The reciprocating saw of claim 2 , wherein the functional assembly further comprises a gear box supporting the transmission mechanism and the buffer is positioned between the gear box and the outer housing.

5. The reciprocating saw of claim 4 , wherein the connecting device comprises a fixed member and a rotating member, the rotating member is rotatably coupled with the fixed member, and the fixed member and the rotating member are fixedly coupled with the gear box and the outer housing respectively.

6. The reciprocating saw of claim 2 , wherein the transmission mechanism further comprises a second eccentric structure coupled to the counterweight and the second eccentric structure drives the counterweight along in the second direction which is opposite to the first direction when the sliding rod moves in the first direction.

7. The reciprocating saw of claim 6 , wherein the motor comprises a motor shaft rotating about a first axis, the first axis is perpendicular to the first straight line and the first direction, and an axial distance between the counterweight and the sliding rod along the first axis is greater than 10 mm.

8. The reciprocating saw of claim 1 , wherein the buffer is one of or a combination of a sponge element, a rubber element, or a spring element and the buffer has a first buffer surface in contact with the outer housing and a second buffer surface in contact with the functional assembly.

9. The reciprocating saw of claim 2 , wherein the sliding rod slides towards an inside of the outer housing and a front end of the sliding rod moves downward when the sliding rod moves in the second direction paralleled to the cutting plane.

10. A reciprocating saw, comprising:
an outer housing;
a functional assembly accommodated within the outer housing, the functional assembly comprising:
a motor supported by the outer housing;
a sliding rod operably coupled to the motor and configured to connect to and drive a saw blade extending from the outer housing; and
a transmission mechanism connecting the motor and the sliding rod, the transmission configured to drive the sliding rod to reciprocate; and

a connecting device rotatably coupling the functional assembly to the outer housing such that the functional assembly is rotatable relative to the outer housing, the connecting device comprising a fixed member fixedly coupled to the functional assembly, and a rotating member fixedly coupled to the outer housing, and
wherein the fixed member of the functional assembly is rotatable relative to the rotating member of the outer housing such that the functional assembly is rotatable relative to the outer housing about a first straight line causing an orbital movement of the saw blade.

11. The reciprocating saw of claim 10 , wherein the reciprocating saw comprises a cutting plane, and the first straight line is perpendicular to the cutting plane.

12. The reciprocating saw of claim 11 , wherein the transmission mechanism comprises a transmission gear driven to rotate by the motor, a counterweight coupled to the transmission gear, and a first eccentric structure connecting the sliding rod and the transmission gear, the transmission gear drives the sliding rod to reciprocate along a first direction and a second direction through the first eccentric structure, and the counterweight moves in the second direction opposite to the first direction when the sliding rod moves in the first direction.

13. The reciprocating saw of claim 12 , further comprising a buffer positioned between the functional assembly and the outer housing, wherein the buffer is elastically deformed at least in a second straight line which is perpendicular to the first straight line when the reciprocating saw is in operation.

14. The reciprocating saw of claim 12 , wherein the functional assembly further comprises a gear box supporting the transmission mechanism, the connecting device comprises a fixed member and a rotating member, the rotating member is rotatably coupled with the fixed member, and the fixed member and the rotating member are fixedly coupled with the gear box and the outer housing respectively.

15. The reciprocating saw of claim 12 , wherein the transmission mechanism further comprises a second eccentric structure coupled to the counterweight and the second eccentric structure drives the counterweight along in the second direction which is opposite to the first direction when the sliding rod moves in the first direction.

16. The reciprocating saw of claim 15 , wherein the motor comprises a motor shaft rotating about a first axis and the first axis is perpendicular to the first straight line and the first direction and an axial distance between the counterweight and the sliding rod along the first axis is greater than 10 mm.

17. The reciprocating saw of claim 12 , wherein the sliding rod slides towards an inside of the outer housing and a front end of the sliding rod moves downward when the sliding rod moves in the second direction paralleled to the cutting plane.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Zhang Wei
• Xu Zhongquan
• Zhang Rui
• Zhou Yang
• Ding Suixi

Classifications

• B23D49/165 Primary

  with means to move the saw blades in an orbital path · CPC title

• B23D49/16 Primary

  actuated by electric or magnetic power or prime movers (B23D49/11 takes precedence) · CPC title

• B23D51/16

  of drives or feed mechanisms for straight tools, e.g. saw blades, or bows · CPC title

• B23D51/161

  with dynamic balancing · CPC title