Saw blade clamping device

Patent metadata

Field	Value
Publication number	US-9744605-B2
Application number	US-201314372592-A
Country	US
Kind code	B2
Filing date	Jan 15, 2013
Priority date	Jan 16, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A saw blade clamping device is configured to clamp at least two types of saw blades and includes a clamping seat and an operating member. The clamping seat has a connecting portion and a loading portion with a loading slot. The operating member has an operating portion with assembling and loading ends. The operating portion is assembled around the loading portion with the assembling end, and the loading end has a loading port. The operating member is rotatable relative to the loading portion. An inner wall of the operating member has a curved driving surface. An abutting element, disposed between the operating member and the clamping seat, has an abutting end, which can extend into the loading slot, and a driving end, which abuts against the driving surface. The abutting end is driven by the driving surface during rotation of the operating member to move into the loading slot.

First claim

The invention claimed is:

1. A saw blade clamping device for a linearly reciprocating type sawing machine being configured to clamp at least two types of saw blades, comprising:
a clamping seat having a connecting portion configured to be driven by the linearly reciprocating type sawing machine and a loading portion formed by extending from the connecting portion, the loading portion having an outwardly facing surface and a loading slot;
an operating member comprising an operating portion with an assembling end and a loading end formed on opposite ends of the operating portion respectively, the operating portion being assembled around the loading portion of the clamping seat with assistance from the assembling end, the loading end being configured with a loading port; and
an abutting element disposed between the operating member and the clamping seat, the abutting element configured to contact the outwardly facing surface of the loading portion, the abutting element having an abutting end,
wherein the operating member is configured to be rotated with respect to the loading portion, an inner wall of the operating member is configured with a driving surface formed in the form of a curved surface, the abutting element is configured with a driving end that abuts against the driving surface, and the abutting end of the abutting element is configured to be driven by the driving surface during the rotation of the operating member to move in a direction toward an inserted saw blade to abut against and fix the inserted saw blade,
wherein the abutting element comprises a U-shaped member having a protrusion configured on a U-shaped portion and two branched arms extending from the U-shaped portion, the protrusion acting as the driving end of the abutting element, and tip ends of the branched arms acting as the abutting end of the abutting element
wherein the loading portion is in the form of a cylinder and comprises a first clamping piece and a second clamping piece, the loading slot extending in the longitudinal direction of the loading portion between the first clamping piece and the second clamping piece,
wherein a notch is configured on each of opposite sides of the first clamping piece, and the notches communicate with the loading slot, and
wherein the two branched arms of the U-shaped member are received in the two notches of the first clamping piece respectively.

2. The saw blade clamping device of claim 1 , wherein the driving surface on the inner wall of the operating member is configured to drive the U-shaped member to move in the direction toward the inserted saw blade.

3. The saw blade clamping device of claim 1 , further comprising:
a holding member in the form of a cylindrical sleeve assembled around the loading portion,
wherein the holding member is formed with a through cut aligned with the notches of the first clamping piece, and
wherein the U-shaped member is configured to be assembled to the first clamping piece through the through cut of the holding member.

4. The saw blade clamping device of claim 1 , wherein the loading port is defined by two narrow slots intersecting with each other and having different lengths, the narrow slot having the smaller length being configured for fixedly holding one type of the saw blades into the loading slot.

5. The saw blade clamping device of claim 4 , wherein the loading slot is configured with an opening, and the narrow slots of the loading port, which have different lengths, overlap the opening of the loading slot alternately as the operating member rotates.

6. The saw blade clamping device of claim 5 , wherein each of the narrow slots is formed by a pair of opposing sectors.

7. The saw blade clamping device of claim 1 , further comprising an elastic member disposed between the operating member and the loading portion, the elastic member being configured to provide a spring force in a circumferential direction between the operating member and the loading portion.

8. The saw blade clamping device of claim 1 , wherein screws that are engageable with each other are configured between the operating member and the loading portion.

9. The saw blade clamping device of claim 1 , wherein the operating member and the loading port are formed as separate members which are detachable from each other.

10. The saw blade clamping device of claim 1 , further comprising:
a further abutting element disposed between the operating member and the clamping seat, the further abutting element having a further abutting end, which is configured to extend into the loading slot, and a further driving end, which is configured to abut against the driving surface, and
wherein the further abutting end of the further abutting element is configured to be driven by the driving surface during rotation of the operating member to move in a direction of extending into the loading slot to abut against and fix the inserted saw blade.

11. The saw blade clamping device of claim 10 , wherein the further abutting element comprises a fixing pin having a first top end and a second top end, the second top end acting as the further driving end of the further abutting element, and the first top end acting as the further abutting end of the further abutting element.

12. The saw blade clamping device of claim 11 , wherein the loading portion is in the form of a cylinder and comprises a first clamping piece and a second clamping piece, the loading slot extending in the longitudinal direction of the loading portion between the first clamping piece and the second clamping piece.

13. The saw blade clamping device of claim 12 , wherein a notch is configured on each of opposite sides of the first clamping piece, and a through hole is configured in the second clamping piece, the notches and the through hole communicate with the loading slot.

14. The saw blade clamping device of claim 13 , wherein the two branched arms of the abutting element are received in the two notches of the first clamping piece respectively, and the fixing pin is received in the through hole of the second clamping piece.

15. The saw blade clamping device of claim 14 , wherein the driving surface on the inner wall of the operating member comprises a first portion and a second portion, the first portion configured to drive the abutting element to move in the direction toward the inserted saw blade and the second portion configured to drive the fixing pin to move in the direction of extending into the loading slot.

16. The saw blade clamping device of claim 14 , further comprising:
a holding member in the form of a cylindrical sleeve assembled around the loading portion,
wherein the holding member is formed with a through cut and an aperture, the through cut being aligned with the notches of the first clamping piece, the aperture being aligned with the through hole of the second clamping piece, and
wherein the U-shaped member is configured to be assembled to the first clamping piece through the through cut of the holding member, and the fixing pin is configured to be received in the through hole of the second clamping piece through the aperture.

Assignees

• Bosch Power Tools (China) Co Ltd
• Bosch Gmbh Robert

Inventors

• Wang Yanchao

Classifications

• B23D49/16

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

• Y10T83/9481

  Tool is single element reciprocable along elongate cutting edge [e.g., saw blade, etc.] · CPC title

• B23D51/10 Primary

  for hand-held or hand-operated devices · CPC title