Hydraulic tool

Patent metadata

Field	Value
Publication number	US-10759037-B2
Application number	US-201715777702-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Jan 5, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

The present invention relates to a hydraulic tool including a working unit, a driving unit, a connection unit, and a switching device. The working unit is adapted to operate a workpiece. The driving unit is configured to drive the working unit and comprises a housing and a movable part provided in the housing and movable between an initial position and an end position. The connection unit connects the working unit and the driving unit. The switching device can rotate between a first position and a second position. When the switching device is in the first position, the movable part of the driving unit has a first stroke from the initial position to the end position; when the switching device is in the second position, the movable part of the driving unit has a second stroke smaller than the first stroke.

First claim

What is claimed is:

1. A hydraulic tool, comprising:
a working unit adapted to operate a workpiece;
a driving unit configured to drive the working unit, comprising a housing and a movable part provided in the housing and movable between an initial position and an end position;
a connection unit connecting the working unit and the driving unit; and
a switching device rotatable between a first position and a second position;
wherein, when the switching device is in the first position, the movable part of the driving unit has a first stroke from the initial position to the end position;
when the switching device is in the second position, the movable part of the driving unit has a second stroke smaller than the first stroke
wherein the switching device is a sleeve provided on an outer surface of the connection unit,
wherein the switching device comprises a stopper,
when the switching device is in the first position, the stopper of the switching device does not prevent the movement of the movable part of the driving unit such that the movable part is able to move between the initial position and the end position,
when the switching device is in the second position, the stopper of the switching device is able to stop the movable part of the driving unit at an intermediate position between the initial position and the end position, such that the movable part is able to move between the intermediate position and the end position.

2. The hydraulic tool of claim 1 , wherein the hydraulic tool further comprises a driving member for driving the working unit, the driving member is mounted on a bracket that is fixedly mounted at an end of a piston rod of the driving unit, and the stopper of the switching device is configured to stop the bracket.

3. The hydraulic tool of claim 1 , wherein the stopper is a projection member extending from the inner surface of the sleeve, the projection member is integrally formed with the sleeve or separately formed with the sleeve and mounted to the sleeve.

4. A hydraulic tool, comprising:
a working unit adapted to operate a workpiece;
a driving unit configured to drive the working unit, comprising a housing and a movable part provided in the housing and movable between an initial position and an end position;
a connection unit connecting the working unit and the driving unit; and
a switching device rotatable between a first position and a second position;
wherein, when the switching device is in the first position, the movable part of the driving unit has a first stroke from the initial position to the end position;
when the switching device is in the second position, the movable part of the driving unit has a second stroke smaller than the first stroke;
wherein the hydraulic tool further comprises a positioning device for positioning the switching device at the first position and/or the second position,
wherein the positioning device comprises a ball, and an elastic member for applying a biasing force to the ball, an accommodation part for accommodating the ball and the elastic member is provided in the connection unit,
a first hole and a second hole are provided in the switching device, wherein, when the switching device is in the first position, the elastic member presses the ball such that the ball abuts against the first hole, and when the switching device is in the second position, the elastic member presses the ball such that the ball abuts against the second hole.

5. A hydraulic tool, comprising:
a working unit adapted to operate a workpiece;
a driving unit configured to drive the working unit, comprising a housing and a movable part provided in the housing and movable between an initial position and an end position;
a connection unit connecting the working unit and the driving unit; and
a switching device rotatable between a first position and a second position;
wherein, when the switching device is in the first position, the movable part of the driving unit has a first stroke from the initial position to the end position;
when the switching device is in the second position, the movable part of the driving unit has a second stroke smaller than the first stroke;
wherein the hydraulic tool further comprises a limiter for limiting the axial position of the switching device,
wherein the limiter comprises a collar provided adjacent to one end of the switching device.

6. The hydraulic tool of claim 5 , wherein the limiter further comprises a step part provided adjacent to the other end of the switching device and positioned on the outer surface of the connection unit.

7. A hydraulic tool, comprising:
a working unit adapted to operate a workpiece;
a driving unit configured to drive the working unit, comprising a housing and a movable part provided in the housing and movable between an initial position and an end position;
a connection unit connecting the working unit and the driving unit; and
a switching device rotatable between a first position and a second position;
wherein, when the switching device is in the first position, the movable part of the driving unit has a first stroke from the initial position to the end position;
when the switching device is in the second position, the movable part of the driving unit has a second stroke smaller than the first stroke;
wherein the connection unit comprises a base part, and a first leg and a second leg extending parallel from the base part,
wherein, the working unit is mounted between the first leg and the second leg; and
the base part is connected to or integral with the driving unit,
wherein the switching device comprises a base part, and a first leg and a second leg extending parallel from the base part,
when the switching device is in the first position, a first recess formed between the first leg of the switching device and the second leg of the switching device is aligned with a second recess formed between the first leg of the connection unit and the second leg of the connection unit,
when the switching device is in the second position, the second recess of the connection unit is at least partially covered by the first leg and/or the second leg of the switching device.

8. The hydraulic tool of claim 7 , wherein when the switching device is in the first position, the first stroke of the movable part ranges from 90 mm to 265 mm.

9. The hydraulic tool of claim 7 , wherein when the switching device is in the first position, the first stroke of the movable part is 100 mm.

10. The hydraulic tool of claim 7 , wherein when the switching device is in the second position, the second stroke of the movable part ranges from 35 mm to 50 mm.

11. The hydraulic tool of claim 7 , wherein when the switching device is in the second position, the second stroke of the movable part is 41 mm.

12. The hydraulic tool of claim 7 , wherein the hydraulic tool is a tool selected from the group consisting of a crimping tool, a clamping tool and a cutting tool.

13. A hydraulic tool, comprising:
a crimping unit configured to crimp a workpiece such as tubing;
a hydraulic driving unit configured to drive the crimping unit, wherein the hydraulic driving unit comprises a cylinder body and a piston provided in the cylinder body, wherein the piston is movable between an initial position and an end position;
a connection unit connecting the crimping unit and the hydraulic driving unit; and
a switching device rotatable between a first position and a second position;
wherein, when the switching device is in the first position, the piston of the hydraulic driving unit moves over a first stroke from the initial position to the end position;
wherein, when the switchin

Assignees

• Emerson Professional Tools Shanghai Co Ltd
• Ridge Tool Co

Inventors

• Zhou Qi
• Chen Leihua

Classifications

• B23D17/06

  actuated by fluid or gas pressure · CPC title

• B25B27/10

  inserting fittings into hoses · CPC title

• B23D29/00

  Hand-held metal-shearing or metal-cutting devices (with nibbling action B23D27/02; hand-operated devices for metal-cutting otherwise than by shearing B26B) · CPC title

• B25F5/005 Primary

  Hydraulic driving means · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title