Coolant coupling device

Patent metadata

Field	Value
Publication number	US-11033995-B2
Application number	US-201716466764-A
Country	US
Kind code	B2
Filing date	Nov 15, 2017
Priority date	Dec 12, 2016
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A coolant coupling device ( 20 ) includes: a cylinder chamber ( 25 ) provided for a support member ( 2 ) for a tool rest ( 4 ) in a machine tool and supplied with coolant; a piston (P) movably arranged in the cylinder chamber ( 25 ); and a coolant supply flow channel ( 30 ) provided for the piston (P) for passing coolant therethrough. The piston (P) is driven by the coolant supplied to the cylinder chamber ( 25 ) so that an outlet ( 32 ) of the coolant supply flow channel ( 30 ) is connected to a coolant inlet port ( 10 ) of the tool rest ( 4 ) to supply the coolant to the tool rest ( 4 ). The piston (P) comprises a cylindrical projection ( 29 ) protruding toward and into the cylinder chamber ( 25 ), and the coolant supply flow channel ( 30 ) has an inlet ( 34 ) that opens at an outer peripheral surface of the cylindrical projection ( 29 ).

First claim

The invention claimed is:

1. A coolant coupling device comprising:
a cylinder chamber provided for a support member for a tool rest in a machine tool and supplied with coolant;
a piston movably arranged in the cylinder chamber; and
a coolant supply flow channel provided for the piston for passing coolant therethrough; wherein said piston is driven by the coolant supplied to the cylinder chamber so that an outlet of the coolant supply flow channel is connected to a coolant inlet port of the tool rest to supply the coolant to the tool rest, characterized in that:
the piston comprises a piston body formed in a disc shape, a pipe portion integrally provided at one axial end of the piston body facing toward the tool rest and protruding axially to the tool rest, and a cylindrical projection integrally provided at another axial end of the piston body facing opposite to the tool rest and protruding axially opposite to the tool rest toward and into the cylinder chamber,
the pipe portion has a diameter smaller than the piston body, and
the coolant supply flow channel has an inlet that opens at an outer peripheral surface of the cylindrical projection.

2. The coolant coupling device according to claim 1 , wherein said inlet has an opening area that is smaller than an opening area of said outlet.

3. The coolant coupling device according to claim 1 , further comprising a spring member arranged between the piston and the support member, wherein
the piston is urged by the spring member in a direction away from the tool rest.

4. The coolant coupling device according to claim 2 , further comprising a spring member arranged between the piston and the support member, wherein
the piston is urged by the spring member in a direction away from the tool rest.

Assignees

• Citizen Watch Co Ltd
• Citizen Machinery Co Ltd

Inventors

• Izumi Kazuyuki

Classifications

• B24B55/02

  Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) · CPC title

• B23Q11/10 Primary

  Arrangements for cooling or lubricating tools or work · CPC title

• B23Q11/122 Primary

  Lubricant supply devices (F16N7/00 takes precedence) · CPC title

• B23B29/242

  Turrets, without description of the angular positioning device (turret lathes for turning individually-chucked workpieces B23B3/16; turrets with manually operated angular positioning devices B23B29/282; turrets with power operated angular positioning devices B23B29/323) · CPC title

• B23B2231/24

  Cooling or lubrication means · CPC title