SU614937A1 - Electrical-mechanical hammer with centrifugal impact mechanism - Google Patents

Description

(54) ELECTROMECHANICAL HAMMER WITH CENTRIFUGAL IMPACT MECHANISM

The invention relates to an electromechanical hammer with a centrifugal mechanism used in construction and repair work. The electromechanical hammer with a centrifugal percussion mechanism is known; it contains a drive, a clip connected to the drive and balls located in the clip, striking the tool ij. In such a hammer, the balls hit the tool for every half turn of the drive shaft. In this case, a strong Kopnj vibration occurs on the hammer. In addition, such hammers have low impact energy, since only the mass of the ball participates in the impact. Also known is an electromechanical hammer with a centrifugal percussion mechanism, comprising a housing, an actuator, a flywheel with diametral and longitudinal grooves connected to the actuator, a drummer placed in the groove of the flywheel, and the return spring of the impactor in such a hammer is partially protruding from the groove of the flywheel by centrifugal force and strikes the tool in such a way that the entire mass of the flywheel participates in the impact, and the impact energy increases significantly. The drummer is connected to the flywheel via a return spring and a rigid rod, and the flywheel is driven via a belt drive. To accelerate acceleration of the flywheel, which stops abruptly after each stroke, torsion springs are provided to deliver a stroke in one turn of the flywheel. The drawbacks of such hammers are concluded in the complexity of the design (belt drive, torsion springs), the increased vibration of the rigid connection of the striker to the flywheel at the moment of impact, as well as the low power density of the flywheel (one turn drive). In addition, such a hammer is short-lived, since the drummer, partially # 1, protrudes from the groove at the moment of impact and experiences a 31-hitch dynamic Harpy ku. The purpose of the invention is to increase the impact of the hammer and the reliability of the hammer. This goal is achieved by the fact that the drummer in the proposed hammer is made in the form of two masses connected with each other by a gibhim mass, one of which is located in the groove and has a throat opening in the central part, and the other is mounted on the flywheel, and is equipped with a synchronizing device in the form of an axially spring-loaded latch installed in the housing along the axis of rotation of the flywheel and interacting with the blind hole of the striker, and the mechanism for releasing the latch with the centrifugal regulator and actuator Kinematically associated with a retainer. In addition, the centrifugal regulator is made in the form of a ball, the size of the flywheel in the radial groove of the flywheel, the elastic lever pressed to the ball and protruding from the radial groove through the hole in the flywheel from the side of the lock and the control switch size & puppy in the case opposite the elastic lever, and the actuator is made in the form of an electromagnet installed in the case on the latch side, the winding of which is connected to the power source through the control switch, and the measles are connected to the latch, the flywheel can be equipped with guides for the mass on the flywheel mounted on its side surface on both sides of the diametrical groove. With such a construction, the simplest execution of the synchronization device, release of the lock and its Easy and fast loading. FIG. 1 shows the described hammer, longitudinal section along the axis} - of FIG. 2 - section A-A of FIG. one; in fig. 3 a & B FIG. 2; in fig. 4 shows a section of & B in FIG. 1} 4ig. 5 is a view of FIG. 4. Electromechanical - the hammer has a body 1 with a handle 2 and a drive 3. The shaft 4 of the drive 3 is connected to a flywheel 5 fixed in the housing 1 on bearings 6. The flywheel 5 has a diametrical groove 7 in which the hammer is located consisting of internal silt a mass 8 mounted to move in a groove 7 of the maxOXojoca, an external mass 9 positioned by an outer flywheel 5. and a flexible element is single with the outer mass 9, and the other return spring il abutting the flywheel 5 is with a flywheel. The internal mass 8 of the impactor has a blind hole 12 on the side opposite to the drive 3, and the spring 11 is chosen in such a way that with the Henojt mobile flywheel 5, the hole 12 is located on the axis of rotation of the flywheel. The housing 1 houses a synchronizing device in the form of a latch 13 spring-loaded 14 and an internal mass 8 entering the blind hole 12 through an axial bore 15 of the flywheel 5. The latch 13 normally keeps the internal mass 8 from moving by the centrifugal force acting on the external mass 9. The housing 1 houses a latch release mechanism comprising a centrifugal regulator 16 (Fig. 3) and an actuating unit 17 (FIG. 1), kinematically connected with the latch 13. The centrifugal regulator 16, which is a control signal sensor or it is formed as a ball 18 mounted in a radial groove 19 of the flywheel 5, and of an elastic arm 20, the clamping ball 18 to the flywheel and protruding at its end a radial groove 19 through the opening 21 in the side fiksektora 13 (FIG. 3) of the flywheel surface with. The centrifugal regulator also includes a switch 22 mounted in the corner of the housing 1, the control (Fig. 4, 5), closed by a flat spring 23, which interacts with the button 24 of the switch, is located with an angle from the lead (Fig. 4) relative to the axis of the tool 25 (Fig. 2) and against the rotational trajectory of the end of the lever 2O, Unit 17, the release of the clamp 13 is made in the form of an electromagnet 26 installed in the housing 1 (Fig. 1), the winding 27 of which is connected to the power source via a control switch 22 (not shown). The anchor 28 of the electromagnet nita 26 is pivotally connected to the latch 13 (Fig. 1). The flywheel 5 is fitted with guides 29 for the outer mass, located on either side of the groove 7 (Fig. 2). The shaft 4 of the actuator 3 is connected to the flywheel 5 through the safety clutch 30, the flywheel 5 assembly is balanced to balance the rotating masses. The described hammer works as follows. When you turn on the drive 3 shaft 4 vrash. em flywheel 5 Chepez MvibTV AOR. The seal bends the force compressing the return spring 11 through the flexible element 10, so that f4To external mass 9 separates from magikovik 5, but does not reach the trajectory of impact on tool 25, since internal mass 8 is kept from moving by clamp 13. When a certain speed of rotation of the flywheel 5 is reached, the ball 18 of the centrifugal regulator 1b sends a control signal 1and to the lock release unit. This happens as follows: the ball 18 is displaced under the action of centrifugal force in the radial groove 19 of the flywheel 5 and presses the elastic lever 2O, withdrawing its end from the orifice of the flywheel 5 so that this end projects outwards and contacts the flat spring 23, which presses the button 24 by the control switch 22. When the button 24 of the control switch 22 is pressed, the winding 27 of the electromagnet 26 of the actuator 17 is connected. with. source of nutrition (not shown). At the same time, the bark 28 is attracted to the winding 27, the latch 13 is moved, compressing the spring 14, and comes out of the blind hole 12 of the inner drum 8 of the striker. The internal mass 8 freed from the centrifugal force applied to it through the flexible element 10, and the external mass 9 enters the trajectory of impact on the tool 25. Due to the fact that the control button 24 of the control 22 is set at an angle relative to the tool 25, torus 16 is delivered with the necessary advance to accurately synchronize the output of the external mass on the impact trajectory. After striking tool 25 outward, mass 9 slightly deflects on the hypo & s element Yu backward with respect to the continued rotation of the flywheel 5, while simultaneously drawing under the action of the spring 11 into the diametral groove 7 of the flywheel along the guides. The speed of rotation of the flywheel 5 in mo. The impact momentum drops, and the ball 18 returns to its original position, and the end of the elastic lever 20 sinks into the opening 21, this prevents the control switch 22 from being triggered again, and the electromagnet 26 remains off. Immediately after turning off the electromagnet 26, the fixer 13 moves under the action of the spring 14 and enters the deep-pit 1 ti of the on-it-ponioo 8 drummer, which by this time was in its original position. If the external mass 9 is accidentally jammed, the coupling 30 prevents the drive 3 from overloading. With this design of the hammer, noei shafts its specific power due to the presence of a synchronizing device and a lock release unit, providing the flywheel acceleration to the maximum speed, striking the tail exactly on the tool's tail. A flexible connection between the external mass of the firing pin and the flywheel eliminates the highly loaded coupling of the firing pin with the flywheel, which increases the reliability of the hammer. The use of a two-mass firing pin with a flexible connection between the masses significantly reduces vibration. claim 1, an electromechanical hammer with a centrifugal percussion mechanism, comprising a housing housed therein, a flywheel with diametral and longitudinal grooves coupled to a drive, placed in a groove of the flywheel, and a return spring of the striker, characterized in that increase shock power and reliability, the impactor is made in the form of two masses interconnected by a flexible element, one of which is located in the groove and has a blind hole in the central part, and is mounted on a flywheel, and is equipped with a synchronizing mouth oystvom designed as a spring-loaded in the axial direction of the retainer mounted in the housing for rotation of the flywheel axis and cooperating with a blind hole udarI nick and Releasing the latch mechanism {centrifugal regulator and ispolgnitelnym node kinematically associated with a retainer. 2, Hammer pop, 1, which is also distinguished by the fact that the centrifugal regulator is made in the form of a ball placed in the radial groove of the flywheel, an elastic lever pressed to the ball and protruding from the radial groove through the holes in the flywheel surface from the fixation side the torus and the control switch, located in the housing opposite the elastic chaga, and the actuator is made in the form of an electromagnet, installed in the housing from the detent side, the control switch is poured, and the measles are connected to the detent.

3. Hammer according to claim 1, and 2, characterized in that the flywheel is provided with directions for mass on the flywheel mounted on its side surface on both sides of the diametrical groove.

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Sources of information taken into account in the examination:

1. USSR author's certificate number 45834, cl. B 25 D 9/04, 1934.

2. US patent N ° 3127941, cl. 173-98, 1968.

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