PL161749B1 - Hydraulic spanner - Google Patents

Abstract

1. A hydraulic wrench including an actuator hydraulic, connected to the piston rod, characterized in that it has two arms drive units (4 and 7), connected together at the joint (8) which mesh with the teeth (9) the ratchet gear (10) opposite, mounted on the driving connector (15), the arms (4 and 7) are short-circuited with a spring (11), pressing them against the teeth (12) of the wheel (10), and one arm (4) it is connected in the joint (3) with the piston rod (2) the actuator (1).

Description

The subject of the invention is a hydraulic wrench for screw connections with a large thread diameter.

Various types of hydraulic wrenches are known for the assembly and disassembly of bolted connections. For example, a hydraulic wrench according to Polish patent application P. 269 954 comprises a hydraulic cylinder connected by a piston rod to a single-acting lever. The actuator cylinder is connected to the base of the key. In the axis of rotation on the base, the lever has a sleeve with a ratchet wheel and a double-sided driving spindle mounted in this sleeve, intended for mounting the key cap.

The hydraulic wrench according to the invention has two drive arms connected to each other in a joint, which with their toothed ends mesh with the opposite ratchet gear. The toothed wheel is mounted on the driving link, which is placed on the outside of the frame by means of a cotter pin. Both arms are short-circuited by a spring, which in working motion presses them against the teeth of the toothed wheel, and one of the arms is articulated with the piston rod of the actuator. The tang connector is replaceable with the possibility of putting it on from two directions depending on the direction of the working torque acting on the screw joint. Moreover, a ratchet is built into the gear.

The key according to the invention, thanks to the use of two arms driving the ratchet gear and the opposite meshing gear, increases the service life, especially of the driving mechanisms. Moreover, due to the interchangeability of the driving torque and the possibility of changing the direction of rotation of the working torque to the right-hand one, the conversion of the key to a different type and size of the screw joint is simple and quick. Also, thanks to the construction used, the maximum approximation of the handle for the screw joint to the main axis of the key was achieved, which is important when using the safety pin against reactive rotation of the key.

The subject matter of the invention is illustrated in an exemplary embodiment in the attached drawing, in which Fig. 1 shows a partially sectioned key in a side view, and Fig. 2 shows its elevation.

The key according to the invention consists of an actuator 1 with a piston rod 2, to which one driving arm 4 is connected in the joint 3 and the frame 6 at the other end in the joint 5. Moreover, it comprises a second driving arm 7 connected to the arm 4 in the joint 8. Both arms 4 and 7 are provided with teeth 9 at their ends, by means of which they cooperate with the ratchet gear 10 - opposite. Moreover, the arms 4 and 7 are connected with each other by means of a spring 11,

161 749, which presses them against the teeth 12 in working motion. The wheel 10 is equipped with a pawl 13, pressed by a spring 14, and the wheel 10 is mounted on a driving link 15, which, located centrally in the axis of this wheel, is secured on the outer side of the frame 6 by by the cotter pin 16. Moreover, the connector 15 is interchangeable with the possibility of putting it on from two directions depending on the direction of the working torque acting on the screw joint.

161 749

Publishing Department of the UP RP. Circulation of 90 copies. Price: PLN 10,000

Claims (2)

Patent claims 1. A hydraulic wrench containing a hydraulic cylinder connected to the piston rod, characterized in that it has two drive arms (4 and 7) connected to each other in a joint (8), which, by means of teeth (9), engage with the ratchet gear (10). ) opposite, mounted on the driving link (15), while the arms (4 and 7) are short-circuited with each other by means of a spring (11), pressing them in working motion against the teeth (12) of the wheel (10), and one arm (4) ) is connected in the articulation (3) with the piston rod (2) of the cylinder (1). 2. The key according to claim The driver according to claim 1, characterized in that the driving link (15), located centrally in the wheel axis (10) is secured on the outer side of the frame (6) with a cotter pin (16) and is interchangeable with the possibility of putting it on from two directions depending on the working direction torque on the screw joint, and in addition to the wheel (10), it has a built-in pawl (13).