SU660852A1

SU660852A1 - Controlled crank mechanism

Info

Publication number: SU660852A1
Application number: SU772456461A
Authority: SU
Inventors: Л.Е. Крайтман; Г.М. Колеватов
Original assignee: Ивано-Франковский Завод Механических Прессов
Priority date: 1977-02-28
Filing date: 1977-02-28
Publication date: 1980-04-25

Description

Изобретение относится к области машиностроения, а именно к конструкциям управляемых кривошипно-шатунных механизмов.The invention relates to the field of engineering, and in particular to structures of controlled crank mechanisms.

Известен управляемый кривошипно- $ шатунный механизм, содержащий смонтированный в станине с возможностью вращения силовой орган, выполненный в виде корпуса со ступицей и установленным в его направляющих ползуном, '0 несущим кривошипный палец и связанным нарезкой с ходовым винтом, который сопряжен зубчатой передачей с регулировочным валом, смонтированным в ступице с возможностью вращения, 15 а также привод силового органа и устройство изменения эксцентриситета кривошипного пальца [1].A controllable crank mechanism is known, which comprises a power element mounted in the bed with the possibility of rotation, made in the form of a housing with a hub and a slider installed in its guides, a carrier bearing a crank pin and connected with a screw that is coupled by a gear transmission with an adjustment shaft mounted in the hub with the possibility of rotation, 15 as well as the drive of the power organ and the device for changing the eccentricity of the crank pin [1].

В известном устройстве возвратнопоступательное движение подвижных 20 частей пресса осуществляется при непрг рывном вращении корпуса, а изменение эксцентриситета кривошипного пальца достигается при переключении зубчатой муфты. 25In the known device, the reciprocating movement of the movable 20 parts of the press is carried out with continuous rotation of the housing, and a change in the eccentricity of the crank pin is achieved when switching the gear clutch. 25

Однако в известном устройстве кривошипный палец находится на консоли, а изменение эксцентриситета кривошипного пальца осуществляется только при вращении корпуса, что 30 резко уменьшает его технологические 'возможности.However, in the known device, the crank pin is located on the console, and the eccentricity of the crank pin is changed only when the case is rotated, which 30 sharply reduces its technological capabilities.

Цель изобретения - расширение технологических возможностей механизма путем бесступенчатого регулирования величины хода ползуна.The purpose of the invention is the expansion of technological capabilities of the mechanism by continuously adjusting the stroke value of the slide.

Цель достигается тем, что устройство снабжено дополнительным силовым органом с регулировочным валом и двумя цепными передачами, а устройство изменения эксцентриситета кривошипного пальца выполнено в виде закрепленного на станине дифференциального редуктора, содержащего водило с двумя сателлитами и. соединенные с ними через промежуточные передачи две ведомые шестерни, при этом дополнительный силовой орган смонтирован в станине й соединен с приводом, а к его ползуну прикреплен кривошипный палец, регулировочные валы силовых органов соединены между особой цепными передачами, одна ведомая шестерня дифференциального редуктора закреплена на ступице силового органа, а другая - на его регулировочном валу.The goal is achieved in that the device is equipped with an additional power element with an adjusting shaft and two chain gears, and the device for changing the eccentricity of the crank pin is made in the form of a differential gearbox mounted on a bed containing a carrier with two satellites and. two driven gears connected to them through intermediate gears, while the additional power unit is mounted in the frame and connected to the drive, and a crank pin is attached to its slider, the power shaft adjusting shafts are connected between the special chain drives, one differential gear reducer driven gear is fixed to the power hub body, and the other on its adjusting shaft.

На фиг. 1 показан предлагаемый механизм, общий вид; на Фиг. 2 - разрез А-А фиг. 1.In FIG. 1 shows the proposed mechanism, a General view; in FIG. 2 is a section AA of FIG. one.

Кривошипно-шатунный механизм содержит смонтированные в станине 1 корпуса 2 и 3, в направляющих которых установлены ползуны 4 и 5, свинчивающиеся с винтами 6 и 7. К ползунам 4 и 5 присоединен кривошипный палец 8, на котором смонтирован шатун 9. Корпуса 2 и 3 с помощью шестерен 10 и 11, закрепленных на общем валу 12, соединены с приводом 13,The crank mechanism contains housings 2 and 3 mounted in the frame 1, in the guides of which there are sliders 4 and 5 screwed with screws 6 and 7. A crank pin 8 is attached to the sliders 4 and 5, on which the connecting rod 9 is mounted. Housings 2 and 3 using gears 10 and 11, mounted on a common shaft 12, connected to the drive 13,

На винтах 6 и 7 закреплены конические шестерни 14 и 15, которые через зубчатые передачи соединены соответственно с регулировочными валами 16 и 17, на которых закреплены звездочки 18 и 19. В свою очередь, последние соединены цепями 20 и 21 со звездочками 22 и 23, закрепленными на валу 24. Это обеспечивает синхронное вращение регулировочных валов 16 и 17.On the screws 6 and 7, bevel gears 14 and 15 are fixed, which are connected through the gears to the adjustment shafts 16 and 17, respectively, on which the sprockets 18 and 19 are fixed. In turn, the latter are connected by chains 20 and 21 to the sprockets 22 and 23, fixed on the shaft 24. This provides synchronous rotation of the adjusting shafts 16 and 17.

К станине 1 крепится механизм нительное перемещение вокруг блоков шестерен 30 и 31. Вследствие того, что у сателлитов 28 и 29 различное число зубьев, происходит рассогласование числа оборотов звеньев кинематической цепи, т. е. корпус 3 и вал 17 будут вращаться с разной скоростью В зависимости от направления вращения вала двигателя 34 валы 16. и 17 будут вращаться быстрее или медленнее .q корпусов 2 и 3. В первом случае ходовые винты 6 и 7 получают, правое вращение, а во втором - левое, т. е, кривошипный палец 8 будет перемещаться в периферии корпусов 2 и 3 или к их центру, увеличивая или уменьшая 15 эксцентриситет. Скорость изменения эксцентриситета может задаваться бесступенчато за счет регулировки скорости вращения двигателя 34.A mechanism for wearable movement is attached to the frame 1 around the gear blocks 30 and 31. Due to the fact that the satellites 28 and 29 have a different number of teeth, the number of revolutions of the links of the kinematic chain is mismatched, that is, the housing 3 and the shaft 17 will rotate at different speeds В depending on the direction of rotation of the motor shaft 34, the shafts 16. and 17 will rotate faster or slower .q of the housings 2 and 3. In the first case, the spindles 6 and 7 receive, the right rotation, and in the second - the left, that is, the crank pin 8 will move in the periphery of buildings 2 and 3 or to their center, increasing or decreasing 15 eccentricity. The rate of change of the eccentricity can be set steplessly by adjusting the rotation speed of the engine 34.

Claims

The invention relates to the field of mechanical engineering, in particular to the structures of controlled crank mechanisms. A controlled crank mechanism is known, comprising a power member mounted in a frame for rotation, made in the form of a housing with a hub and mounted in its guides by a slider, carrying a crank pin and connected with a spindle, which is matched with an adjustable gear shaft mounted in the hub for rotation, as well as the drive of the power body and the device for changing the eccentricity of the crank pin 1. In the known device, the reciprocating motion The movable parts of the press are made not with a jerky rotation of the body, and the change in eccentricity of the crank pin is achieved when the gear clutch is switched. However, in the known device, the crank pin is on the console, and the eccentricity of the crank pin is changed only when the housing rotates, which drastically reduces its technological capabilities. The purpose of the invention is to expand the technological capabilities of the mechanism by continuously adjusting the stroke of the slide. The goal is achieved by the fact that the device is equipped with an additional Elm organ with an adjusting shaft and two chain drives, and the device for changing the eccentricity of the crank pin is made in the form of a differential gear mounted on the frame containing a carrier with two satellites and. two driven gears connected to them through intermediate gears, while an additional power unit is mounted in the frame and connected to the drive, and a crank pin is attached to its slider, the adjusting shafts of the power organs are connected between special chain gears, one gear of the differential gear is mounted on the power hub body, and a friend - on its adjusting shaft. FIG. 1 shows the proposed mechanism, a general view; in fig. 2 - section A-A of FIG. 1. The crank mechanism contains bodies 2 and 3 mounted in the bed 1 in which guides sliders 4 and 5 are mounted, screwed with screws 6 and 7. The cranks 8 are attached to the slide blocks 4 and 5 on which the rod 9 is mounted. 2 and 3 using gears 10 and 11, mounted on a common shaft 12, are connected to the drive 13, Bend gears 14 and 15 are fixed to screws 6 and 7, which are connected via gear drives to the adjusting shafts 16 and 17, respectively, on which asterisks 18 and 19 are fixed. In turn, the last connections The chains 20 and 21 with sprockets .22 and 23 fixed on the shaft 24. This ensures the synchronous rotation of the adjusting shafts 16 and 17. To the frame 1 there is attached an eccentricity change mechanism with a crank pin, which includes a housing 25 in which the drive gear 26 is mounted, drove 27 with satellites 28 and 29 connected via gears 30 and 31 to output gears 32 and 33. Output gear 32 is fixed on the hub of housing 3, and output gear 33 is mounted on the adjusting shaft 17. The gearbox is driven from lom 35 with drive pole erney 26. A crank mechanism works in the following way. The torque from the actuator 13 through the shaft 12 and the gears 10 and 11 fixed on it is transmitted to buildings 2 and 3, which, together with the sliders 4 and 5 and the crank finger 8, rotate in the slide bearings in the plane 1. At the same time, together with the housing 3, output gear 32 rotates, which through gear unit 30, satlits 28 and 9, and gear unit 31 transmits rotation to the adjusting shaft .17 through output gear 33. The number of gear teeth is chosen in such a way that shaft 17, having performed at the same speed as - and housing 3, is fixed to the building 3, and the investigator but remain stationary relative to the housing 2 and 3 spindles 6 and 7 and their associated slider. 4 and 5, as well as the crank pin 8. To change the eccentricity during the operation of the press, as well as during shutdown, the engine 34 is turned on, which, through the drive gear 26, transmits the rotation to the carrier 27, and the satellites 28 and 29 receive additional movement around blocks of gears 30 and 31. Due to the fact that satellites 28 and 29 have a different number of teeth, a mismatch occurs in the number of revolutions of the links of the kinematic chain, i.e., the body 3 and the shaft 17 will go to a different speed. Depending on the direction of rotation of the motor shaft 34, shafts 16. and 17 will rotate faster or slower than housings 2 and 3. In the first case, spindle screws 6 and 7 will receive right-hand rotation, and in the second case left, i.e., crank pin 8 will move in the periphery of the housings 2 and 3 or toward their center, increasing or decreasing the eccentricity. The rate of change of the eccentricity can be set infinitely by adjusting the speed of rotation of the engine 34. Claims The driven crank mechanism has a power member mounted in a frame rotatably, made in the form of a body with a hub and mounted in its guides with a slide bearing a curved finger and associated threading with a lead screw, which is matched by a gear transmission with an adjusting shaft mounted for rotation in the hub, as well as driving forces body and device for changing the eccentricity of the crank pin, characterized in that, in order to expand technological capabilities by continuously adjusting the stroke of the slide, it is equipped with an additional power unit with an adjusting shaft and two chain transmissions, and the device for changing the eccentricity is made in the form of a differential a reducer containing a carrier with two satellites and two driven gears connected to them through intermediate gears, while adding The power unit is mounted in the frame and connected to the drive, and a crank pin is attached to its slider, the adjusting shafts of the power organs are interconnected by chain drives, one driven gear of the differential gearbox is mounted on the hub of the power member, and the other is mounted on its adjusting shaft. Sources of information taken into account in the examination 1. USSR author's certificate 388916, cl. B 30 B 15/14, 1971.

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