DE202008009266U1 - Hydraulically operated rotary torque wrench type JBRH - Google Patents

Abstract

hydraulic driven torque wrench by continuously rotating Movement predefined torques automatically up to one Preset torque value applies to screw connections and only a low-pressure pump system is needed as the drive source. thereby characterized in that the torque wrench has two hydraulic quick couplings (A) and corresponding hydraulic hoses to a low pressure pump system connected and driven with it

Description

hydraulic operated torque screwdriver usual Design are for applying previously defined torques Screw connections of any size applied and need plus a piston / ratchet thrust system to get the required rotational movement to tighten the screw and a multi-stage high pressure pump system (up to 800 bar) as a drive unit.

The However, rotary motion of this screwdriver is due to the used Technology limited to degrees and turns, depending on the gearing, between 20 and 35 degrees maximum by stroke. A complete screw connection to a specified torque Therefore takes place in many time-consuming successive single strokes, wherein the screwdriver initiates a return stroke after each forward stroke then again in the forward stroke push the ratchet further and allow the screw on the thread continues to turn. Thus, no continuous 360 degrees rotating Screwing in one operation up to the preset maximum torque possible at the screw connection.

Of the in claim 1 protection invention is based on the problem to create a hydraulically powered torque wrench the over the entire screwing process a continuously rotating, unlimited Turn the nut to the pre-set torque automatically enabled and by a low-pressure pump system (100 bar) safe and reliable is driven.

This Problem is solved with the features listed in the protection claim 1.

With The invention is achieved in that the application of previously defined Torque on a screw connection, continuous in one Operation to be performed to the required end torque can. After starting the screwdriver, it turns automatically continuously rotating the nut on the threaded bolt firmly and stops the gland exactly on reaching the fit this Screw connection predetermined final torque.

High precision torque fittings are thus gentle on energy and energy, as well as on account of the continuous Rotational movement, extremely time-saving, safe and precise perform.

A

hydraulic quick coupling

B

Rotary feedthrough 360 ° free Swiveling with integrated operating unit.

B / 1

LED two colored, for Status display. (Rotation / rest)

B / 2

pushbutton for rotation clockwise.

B / 3

pushbutton for rotation counterclockwise.

C

hydraulic Orbital motor 10 l / min 100 bar reversible, with aluminum heat sink.

D

mounting flange with rotation query.

e

upper two-stage planetary gearbox.

F

lower two-stage planetary gearbox.

G

torque reaction support

H

Square Drive

I

DIN Aufstecknuß

Claims (11)

Hydraulically driven torque wrench that automatically applies pre-defined torques to screw connections through pre-set torque values through continuously rotating motion, using only a low-pressure pump system as the drive source. characterized in that the torque wrench is connected via two hydraulic quick couplings (A) and corresponding hydraulic hoses to a low pressure pump system and thus driven Torque wrench according to claim 1, characterized that the hydraulic quick couplings (A) can be swiveled freely on a 360 ° Turntable with integrated control unit (B) are located Torque wrench according to claim 1. thereby marked that the control unit (B) on the operation of the screwdriver required push button for Rotational movement in clockwise direction (B / 2) and for counterclockwise rotation (B / 3). Further is in this operating unit a two-color LED signal light (B / 1) which serves as a status display for the status "rotation / standstill" Torque wrench according to claim 1, characterized that a hydraulic orbital motor (C) with aluminum heat sink and Reversible direction of rotation and "limit valve 100 bar" as continuous Rotary drive is used Torque wrench according to one of the preceding claims. characterized in that the orbital motor (C) is connected to the two-stage upper planetary gearbox (E) via a connecting flange "transmission / drive" (D). A proximity switch is accommodated in the connecting flange (D) which serves to display the query "Rotation / Standstill" via the LED signal lamp (B / 1). Torque wrench according to one of the preceding claims characterized characterized in that the upper two-stage planetary gear (E) via the gear housing and over a Sun gear connected to the lower two-stage planetary gear (F) is Torque wrench according to one of the preceding claims characterized characterized in that the lower two-stage planetary gear (F) drives a drive square (H) Torque wrench according to one of the preceding claims characterized characterized in that the drive square (H) the required Rotational force by positive engagement on a DIN-Aufstecknuss (I) transmits Torque wrench according to one of the preceding claims characterized characterized in that the reaction forces from the rotational movement of the drive square by a 36-way adjustable torque arm (G), which has a Gearing on the gear housing form-fitting is held, neutralized Torque wrench according to one of the preceding claims characterized characterized in that the direction of rotation of the screwdriver reversible is and thus screwed in both directions continuously can be or screw connections can be solved. Torque wrench according to one of the preceding claims characterized that is an overload and damage the upper and lower planetary gear through the starting characteristic and pressure limit of the hydraulic planetary motor excluded becomes.