Tie tamper
AssigneesNippon Kokuyu Tetsudo, Kabushiki Kaisha Shibaura Seisakusho
InventorsKazuhide Yamazaki, Shigetoshi Ogawa, Atsushi Suma, Maki Nakajima
Life of this patent
Estimating the term…
Abstract
The handle of a tie tamper is connected to its vibration generating motor, which vibrates a beater fixed thereto, by a combination of a Neidhart damper secured to one end of the handle, a shackle-like link pair fixed at its one end to the damper, and an arcuate leaf spring pin-connected at its one end to the other end of the link pair and at its other end to the motor and by a two-bar linkage connected at its two ends via Neidhart dampers respectively to an intermediate part of the handle and to the motor, a balance weight being provided at the pin joint between the two links of the two-bar linkage, and a strap connected at its ends to the handle and motor limits the extension of the two-bar linkage.
Claims6
A tie tamper comprising:
- a motor adapted to generate vibration as output;
- a beater designed to be thrust at a distal end thereof into ballast gravel and rigidly fixed at its proximal end to the motor to be vibrated thereby;
- a handle to be grasped by an operator of the tie tamper;
- a link mechanism connecting an intermediate part of the handle to the motor and comprising
- a first Neidhart damper secured to the motor and having a non-cylindrical shaft disposed therein,
- a second Neidhart damper secured to said intermediate part of the handle and having a non-cylindrical shaft disposed therein,
- a first link fixed at one end thereof to the shaft of the first Neidhart damper, and
- a second link fixed at one end thereof to the shaft of the second Neidhart damper and pinconnected at the outer end thereof to the other end of the first link,
- the first and second links always forming therebetween an angle less than 180 degrees;
- a support mechanism connecting one end of the handle to the motor and comprising
- a support spring connected at one end thereof to a part of the motor,
- a third Neidhart damper, secured to said one end of the handle and having a non-cylindrical shaft disposed therein, and
- a third link fixed at one end thereof to the non-cylindrical shaft and connected at the other end thereof to the other end of the support spring;
- and
- a balance weight fixed to said other end of the second link.
Dependencies are inferred from the claim text.