The mechanism for converting the rotational motion of the screw in

 

(57) Abstract:

The invention relates to mechanical engineering and can be used to transform the movement into the mechanisms of the actuator piston pumps, for example, plunger. The technical result is to simplify the design and increase the reliability and durability of the mechanism. This is achieved through the execution of the crank 2 in the form of a hollow Cup, the bottom of which facing the guide housing 1, and its inner surface is a truncated cone. The mechanism is equipped with a compression spring 7, the ends of which are fixed respectively facing each other of the inner surface of the housing 1 and the outer surface of the bottom of the glass, and the lever 4 mounted on the leading element 3 and kinematically associated with the inner surface of the glass. During the rotation of a driving element 3, the lever 4 through the bearing 5 will rotate the crank 2 in the direction of a driving element 3. 1 Il.

The invention relates to mechanisms for converting motion and can be used in the mechanisms of the actuator piston pumps, for example, plunger. The device can also be used in the shock mechanisms, for example, in the bumper hammers, and mashinostroitelnoe, consisting of a drive shaft to the crank, a driven element, reciprocating motion, and an intermediate link - rod [1].

The disadvantage of the mechanism of transformation is the presence of lateral forces acting on the slave link in the process.

It is also known a device for converting rotational motion of the screw containing a crank mechanism with a parallel arrangement of the axis of rotation of the crank and slider and the housing guides of the slide and crank [2].

To the disadvantage of the prototype can be attributed to the relative complexity of design, and low reliability and durability due to the presence of articulated linkage connecting the crank with the slide in the form of an intermediate lever, which in the process, especially when large axial loads of the slide feels under complicated stress state of bending, torsion, and tension and compression.

The purpose of the invention is to simplify the design and increase the reliability and durability of the mechanism.

This is achieved by the fact that the crank is made in the form of a hollow Cup, the bottom of which facing the guide body, and its inner surface is in the form of usesite, the ends of which are fixed respectively facing each other inside the housing and the outer surface of the bottom of the glass, and a lever mounted on the master element and kinematically associated with the inner surface of the glass.

The drawing shows the construction scheme of the mechanism.

The mechanism for converting the rotational motion of the screw includes a housing 1 with a linear track, for example, in the form of a cylindrical hole. Crank 2 is made in the form of a hollow Cup, the bottom of which facing the guide body, and its inner surface is a truncated cone. On the master element 3 is rigidly fixed to the lever 4, the free end of which is provided with a bearing 5 in contact with the inner conical surface of the crank 2.

Axis of the crank 2 and the leading element 3 can be aligned, but can be done at an angle. On the top the bottom of the crank 2 fortified slide 6 mounted in the bore of the housing 1 with a reciprocating motion. Between the outer surface of the bottom of the crank and the inner surface of the housing on the slider 6 is a compression spring 7, one of which ends is in contact with the thrust of the execution of the idle stroke of the RAM 6. Crank 2 before Assembly dynamically balanced.

The mechanism works as follows.

During the rotation of a driving element 3, the lever 4 through the bearing 5 will rotate the crank 2 in the direction of a driving element 3. Due to the fact that the axis of rotation of the crank eccentric axis fixing it in the housing 1 by the value a and the inner surface of the crank is made in the form of a truncated cone, crank and secured on the slider 6 will perform, in addition to the rotational motion around the axis of the screw, and reciprocating, i.e., the total movement of the slide will be a screw and directed upwards, when this occurs, the compression spring 7.

At the end of the contact bearing 5 with a conical surface of the crank by increasing the radius of rotation of the latter crank 2 and accordingly the slider 6 under the action of the spring 7 will begin to drop to a new point of contact between the bearing 5 with a conical surface of the crank. The process then repeats.

The forward stroke of the RAM 6 is determined by the dependence of

L = (r - a) tg , where L is the length of the slide 6;

r is the radius of the upper base of the inner truncated cone crank;

and the eccentricity between osami the nature of the connection of the slave slider 6 with the working body (not shown), the latter, together with a screw may also be performed only translational motion.

The MECHANISM FOR converting the ROTATIONAL MOTION of the SCREW comprising a housing with a guide rail, a slider, one end of which is in it, the crank, the axis of which is parallel and eccentric to the axis of the slide, and the leading element, characterized in that the crank is made in the form of a hollow Cup, the bottom of which facing the guide body, and its inner surface is in the form of a truncated cone, one end of the slide is fixed on the outer surface of the bottom of the glass, the mechanism is equipped with a compression spring, the ends of which are fixed respectively facing each other inside the housing and the outer surface of the bottom of the glass, and a lever installed on the master element and kinematically associated with the inner surface of the glass.

 

Same patents:

Transport vehicle // 2360821

FIELD: transportation.

SUBSTANCE: transport vehicle includes body (2) and base (1), wheels (7) fixed in base (1). Pulse propeller is installed in base (1) and consists of elastic power element (5) and impeller (4) with alternate eccentricity, which actuates engine (3). Base (1) rests on wheels (7) with the help of Z-shaped supports (8) with elastic elements that work for twisting. Drive to wheels (7) is realised via Z-shaped gear from engine (3). Elastic power element (5) may be arranged in the form of movable plate spring fixed at an angle to base (1) on guides (6), with the possibility of its complete drawing inside body (2). Elastic power element (5) is able to rotate relative to base (1).

EFFECT: lower dynamic loads in jump and possibility to use any engine with rotary output shaft for drive of pulse and wheel propellers.

4 cl, 1 dwg

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