Puller for removal

 

(57) Abstract:

The invention relates to a mechanical Assembly production and can be used when removing parts such as gears, pulleys, bearings. On the housing having an aperture, by means of hinges installed two shoulders gripping arms with hooks and inclined slots for the hinges. In the housing bore movably installed power cylinder with a spring-loaded rod. Puller equipped with a flat fist, mounted with a possibility of rotation relative to the housing and evenly spaced around the perimeter of the same work helical surfaces. Each lever is mounted for cooperation with a corresponding surface of a fist and is spring-loaded towards the fist and the corresponding hinge. Working surfaces of the fist is made in the form of an Archimedean spiral with angle of elevation, the value of which does not exceed the value of the angle locking. Work surfaces are interconnected by a cylindrical surface, coupled with the area of the working surface having a minimum radius of the spiral, and a flat surface located at an angle to the area of the working surface having maximummaturity 1-10o. The result is increased reliability of operation of the puller. 2 C.p. f-crystals, 3 ill.

The invention relates to equipment Assembly production, namely, devices for dismantling parts, mainly press-fit connection.

Known puller for removal according to the author's certificate of the USSR 1593880 23 P 19/02, B 35, 1990, the puller includes a housing with an opening and pivotally attached to the gripping legs made in the form of two shoulders of the levers, the power cylinder with the rod mounted for movement in the said bore of the housing, and the drive is made with the contact zone with the corresponding arms of the levers and mounted on the housing can be rotated about its axis. The surface of the disk that hosts the zone of contact with the shoulders of the levers is made concave, and levers mounted for movement on the surface of the contact zone, having a spiral groove or spiral projections on the edge of the disk.

A known design of a stripper has the following disadvantages.

The presence of a disk with a spiral groove on the top of a spiral protrusion on, placing the contact zone spirals disk according to the s and mass at low performance and manufacturability of a stripper. When the clutch grabs with removable item possible elastic deformation of seizures, which do not are compensated, which reduces the reliability of the device.

Known puller for removal (patent RF 2149091 23 P 19/027, 25 In 27/02, 2000), comprising a housing with an aperture mounted on the housing by hinges capture two shoulders arms with hooks and inclined grooves for placement of the hinges, the power cylinder with the spring loaded valve mounted for movement in the housing bore, and a flat fist, mounted to rotate relative to the housing and evenly spaced around the perimeter of the same work helical surfaces. Each lever is mounted for cooperation with a corresponding surface of a fist and is spring-loaded towards the fist and the corresponding hinge.

This design puller selected for the prototype.

The disadvantages of the known puller following.

Possible spontaneous rotation of the knuckle relative to the housing due to the existing design of the contact zone spirals fist with spherical ends of the thrust screws levers. May be you. In addition, limited the maximum size of the disassembled parts (diameter and height) of the existing design two shoulders arms and insufficient rate of return the rod to its original position.

The objective of the invention is to improve the reliability of operation of the puller.

The task is solved in that the puller, comprising a housing with an aperture mounted on the housing by hinges capture two shoulders arms with hooks and inclined grooves for placement of the hinges, the power cylinder with the spring loaded valve mounted for movement in the housing bore, and a flat fist, mounted to rotate relative to the housing and evenly spaced around the perimeter of the same work helical surfaces, with each lever is mounted for cooperation with a corresponding surface of a fist and is spring-loaded towards the fist and the corresponding hinge conducted the following changes:

Working surfaces of the fist is made in the form of an Archimedean spiral with angle of elevation, the value of which does not exceed the angle of locking, and are interconnected by a cylindrical over the, the positioning angle of a section of the working surface having a maximum radius of the spiral, and the grooves of the gripping levers are made with an angle whose magnitude exceeds the magnitude of the angle locking 1... 10o.

In addition, the surface of the levers facing the dismantled parts are made concave at the expense of the undercut from the base of the hooks and the rod coaxially first installed additional spring with the opposite direction of the coils.

These improvements increase the reliability of a stripper.

The invention is illustrated by drawings.

In Fig.1 shows a longitudinal section of the puller of Fig.2 is a view of a flat fist in the direction of arrow a in Fig.1, in Fig.3 - view of B in Fig.2 with additional constructs the profile of a fist.

Case 1 (Fig. 1) with a rigid cross-piece 2 has a Central axial bore 3 in which is housed a piston 4 with the sleeve 5 and the shaft 6, the threaded hole 7 for connection with a hydraulic drive (not shown). The rod 6 and the spring 8 are fixed flanges 9. The rod 6 is equipped with a replaceable centers 10 for engagement with the shaft of the disassembled parts. In the radial grooves 11 of the spider 2 (Fig.1 and 2) are two shoulders recopy 15.

On the body 1 can be rotated flat fist 16. There are areas of contact areas 17 profile Archimedean spiral with a spherical end 18 of the thrust screws 19 of the levers 12 (Fig.1 and 2). On the end of crosses 2 fixed flat spring 20 (Fig.1), the petals of which presses the two shoulders arms 12 to the knuckle 16 and the hinge 14. From the side displacement of the levers 12 are held radial slots 11 of the spider 2 and the guide slots 21 of the strap 22 secured to the housing 1 and the flange 9.

Fists 16, shown in Fig.2 and 3, the surface 17 is made in the form of evenly spaced identical spiral sites with profile Archimedean spiral. Their working surfaces 17 are connected to each other through the flat surface 23, polnotsennuyu angle in the direction of the spiral portion with a maximum radius R, and the cylindrical surface 24 of radius adjacent to the circular area with a minimum radius r. Obviously, the undercut can be determined from the rectangular triangle EAD (Fig.3), given that OS= r, the line segment OB=R--r (Fig.2 and 3):

< / BR>
It is advisable radius of the cylindrical surface r is equal to the radius of the machining tool (end cylindrical cutters), and the difference (R is s 12. The surface 17 is performed on the entire area of contact with the spherical end 18 of the screws 19 with the elevation angle of the spiral , where the friction angle equal to 6...15o(see the book Terlikowski T. F. and others , "design principles of jigs". - M.: Mashinostroenie, 1980, page 43).

The design of the puller angular position of the inclined grooves 13 is regulated, namely, angle = +1...10avoid samozakryvaniya levers 12 by hinges 14.

Surfaces 25 and 26 of the levers 12, facing the dismantled parts are made concave at the expense of the undercut from the base of the hooks 15. On the rod 6 mounted coaxially of the spring 8 additional spring 27 with the opposite direction of the coils.

It should be noted that setting the two shoulders levers 12 in the grooves 11 of the hooks 15 on the outside, and screw 19 spherical ends 18 to the knuckle 16, you can capture and dismantling of parts for its internal projections.

The extractor works as follows.

Seizure of movable parts is effected by rotation of the knuckle 16 of his arm. Two shoulders levers 12 are reduced (diluted) for the required distance between the hooks 15 and the tabs removable parts. Feeding oil into the hole 7, associated with the hydraulic actuator, the push rod 6 to remove the item, compensating for possible elastic deformation of seizures. The pressure increase in the hydraulic drive contributes to the removal from the shaft upon axial movement of the rod 6 with the center 10.

After dismantling the details of the pressure rod 6 is reduced to atmospheric and the rotation of the knuckle 16 in the opposite direction releases the removed item from the hooks 15 of the puller. The rod 6 under the action of springs 8 and 27 is returned to its original position.

Advantages of the design expressed in the following.

Implementation of sections 17 Kulakov 16 in the form of an Archimedean spiral allows you to have a constant angle of lift of the spiral, the value of which does not exceed the value of the angle locking for 120o(3 gripper rods) or 180o(2 capture) due to the fact that the surface 17 of the fist 16 with a minimum radius of one area associated with the area of the working surface of radius R by a flat surface 23 is angled to the specified area, and tangent thereto a cylindrical surface 24 with a radius of, for example, processing profiles knuckle 16 of the tool. Proposed enhancements to improve reliability of a stripper for ensuring the locking in the contact zone of the links puller is no run of the angle of inclination of the grooves 13 on the two shoulders of the levers 12 large angle of friction, to avoid samozakryvaniya lever 12 by hinges 14 during operation of the puller.

It should be noted that the possible use instead of two coaxially to the stem of the installed spring 8 and 27 of spring heavy gauge wire when making major moves of the stock and, as a consequence, due to the large number of turns increases the size and weight of the puller.

The implementation of the surfaces 25 and 26 of the levers 12 concave due to their undercut from the bases of the hooks 15 provides the opportunity removal from the rolls of large parts.

1. Puller for removal, comprising a housing with an aperture mounted on the housing by hinges capture two shoulders arms with hooks and inclined grooves for placement of the hinges, the power cylinder with the spring loaded valve mounted for movement in the housing bore, and a flat fist, mounted to rotate relative to the housing and evenly spaced around the perimeter of the same work helical surfaces, with each lever is mounted for cooperation with a corresponding surface of a fist and is spring-loaded towards the fist and sooty with elevation, the value of which does not exceed the value of the angle locking, and are interconnected by a cylindrical surface, coupled with the area of the working surface having a minimum radius of the spiral, and a flat surface located at an angle to the portion of the surface having the maximum radius of the spiral, and the grooves of the gripping levers are made with an angle whose magnitude exceeds the magnitude of the angle locking 1-10o.

2. The puller under item 1, characterized in that the surface of the gripping levers facing the dismantled parts are made concave at the expense of located from the base of the hooks of the undercut.

3. The puller under item 1 or 2, characterized in that it is provided with an additional spring mounted on the rod of the power cylinder coaxial with the first spring, when first mentioned and additional springs are made with the opposite direction of turns.

 

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SUBSTANCE: movable installation includes lifting table having lower wheeled platform and jointly mounted on it upper stand; mechanism for lifting and descending said stand; power hydraulic cylinder mounted on upper stand and communicated by means of hydraulic lines through control unit with high-pressure pump system; clamping device for mounting-dismounting bearing assemblies. High pressure pump system includes tank, pump aggregate, draining pipeline, suction pipeline connecting inlet of pump aggregate with tank. Lifting and descending mechanism is in the form of hydraulic cylinder and it is mounted on lower platform. Pump aggregate is arranged on upper lid of tank and it is in the form of displacement hydraulic pump with electric motor. Filter is mounted in suction pipeline. Control unit is in the form of body having two built-in safety valves, tap distributor and built-in non-return valve. Manometer and additional filter connected with draining pipeline and having pouring hole are connected with control unit. Hydraulic lines are in the form of flexible hoses. Installation is provided with additional power hydraulic cylinder that forms together with connected in parallel main hydraulic cylinder unit of power hydraulic cylinders. Said unit of power hydraulic cylinders is placed on supporting sheet-plate mounted on upper stand with possibility of rotation or removal from upper stand and with possibility of moving in range of length of flexible hoses. Similar cavities of hydraulic cylinders are mutually communicated. Clamping device includes movable and stationary plates mounted respectively on rods and back lids of hydraulic cylinders and designed for joining tie rods of attachment.

EFFECT: enhanced reliability, no-failure operation of installation.

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3 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: present invention pertains to machine building, particularly to devices for controlling the pressing process when making press joints in cylindrical objects for automating control of assembling processes. The device for controlling the pressing process when making press joints in cylindrical objects has a hydraulic press, joined together four updrafts with an elevating beam, four measuring transducers, each of which is in form of a strain sensor, an analogue-to-digital converter and an evaluator. The strain sensors are made on a measuring bridge circuit with provision for registering forces arising in the four updrafts. The outputs of the strain sensors are connected to the inputs of the analogue-to-digital converter, and the outputs of the latter are connected to inputs of the evaluator.

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