• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A truck has a cab tiltable between full-down and full-tilt positions by means of double-acting hydraulic lift cylinders. The double-acting cylinder and the control system therefor, which includes a manually, electrically or air driven pump and a manually operable selector valve, enables the cab to be positively moved from full-down to overcenter position whereupon the cab then slowly descends under the force of gravity to full-tilt position. Furthermore, it enables the cab to be positively moved from full-tilt position to overcenter position whereupon the cab then slowly descends under the force of gravity to full-down position. Each cylinder is provided with two integrally mounted velocity fuses as a safety feature. In the event of a hydraulic system failure, one fuse prevents free-fall movement of the cab when the cab is in any position between full-down and overcenter position. In one embodiment of the invention, both fuses are located in the lower end of the cylinder. In another embodiment, the fuses are located at opposite ends of the cylinder.
    公开号:SU745358A3
    申请号:SU742053585
    申请日:1974-08-13
    公开日:1980-06-30
    发明作者:Рейнольдс Рой；Т.Нейл Вильям
    申请人:Эпплайд Пауэр Инк (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to lifting devices, namely to hydraulic cylinders, used primarily for raising and lowering the cab of a truck. A double-acting hydraulic lifting cylinder is known, comprising a housing with a base and a piston with a rod mounted inside the housing and forming two working chambers W. A disadvantage of the known device is its low reliability. The purpose of the invention is to increase the reliability of the device. For this, the hydraulic lifting cylinder is provided with two speed limiters, each of which contains one longitudinal relative cylinder cylinder axis hole made at the end of the body and at least one transverse hole made at the base, with each hole made with a tapering part valve seat, a ball valve installed in; an opening with the possibility of interacting with said seat, a port for passage of a fluid valve. bone, made in the cylinder body and connected to the orifice on the other side relative to its narrowing part, a spring element installed in the hole, interacting with the valve ball and ensuring its retention outside the seat under normal CONDITIONS; operation, an adjusting element interacting with the spring element and providing adjustment of the latter outside the body, directing a spring element interacting with the ball and holding it in the saddle, and a channel made in the cylinder body connecting the opening portion, located on one side with its suzhivayuscheys portion of the cylinder chambers. FIG. Figure 1 shows a side view of a truck equipped with a hinged cab with a hydraulic lifting cylinder; in fig. 2 is the same as the second embodiment; in fig. 3 — hydraulic lift cylinder control circuit; in fig. 4 - the same, the second option; in fig. 5 - lifting cylinder, cross section; in fig. 6 shows section A-A in FIG. five; in fig. 7 is a section BB in FIG. five; in fig. 8 lifting cylinder / cross section, the second option; figure 9 -.
    Section B-B in FIG. eight; in FIG D 10, the hydraulic regulator is a UY-AKayon cylinder in axonometry.
    The truck 1 is equipped with a cab 2, which is shifted to the required position by a lifting gig, by an irocidor 3, which has a hull j 4 and; rod 5. The lower ends of the cylinders 3 are hinged to the chassis Fomobil 1 av, and the rods 5 are hinged on the cab 2. The working fluid is supplied to the hydraulic cylinders 3 by means of a regulator 7 connected to the hydraulic cylinders 3 by hoses 8.9. The lower part of the hydraulic cylinder 3 closed by a base 10, and the upper gland 11, connected to the housing 4 by means of a threaded connection and covering the rod 5. At the inner end of the rod 5 there is a piston 12, which interacts with the inner wall of the hydraulic cylinder 3 and forms two chambers 13, 14. ene formed integrally with it limiters 15, 16 speed. The stopper 15 has a transverse opening 17, the central axis of which is perpendicular to the longitudinal axis of the hydraulic cylinder. Channel 18 connects the cylinder chamber 13 and the transverse hole 17, which is made at the end with a 5 mm diameter and acts as an inlet, closed by a stopper 19. The other end of the aperture 17 also has a cut and is closed by a stopper 20. Mexgqy inlet and stopper 20 there is a constricted portion 21 forming a seat 22 interacting with the ball 23. A guide spring 24 is installed between the plug 20 and the ball 23. On the other side of the ball 23 there is an adjusting spring 25 pressed against the ball 23 of the adjusting shaft 26. Hole 17 of the fuse 16 speeds {similar in design with limiter 15) is connected with a gauge of 12 hydraulic cylinders using channel 27, filled at the base 1b, as well as using a tube 28, tracing between channel 27 and camera 14.
    The controller 7 contains a pump 29 with a manual drive (it is possible to use HauoiSra with ELEC p1 cher1 "yi Shi pneumatic actuator), a handle, 30, a reservoir 31 and two-way apan, a safety valve 33, a measuring nozzle 34 posts nrnrgo prtstska and a measuring nozzle 35 of the variable flow, located in valve 32. Pump 29 connects with Shchapan 32 to main 36, and with Eservatory 31 - to a conduit (return 37. There is a nozzle 34 to paw 32 and a reservoir 31. Safety valve 33 installed between line 36 and tank
    745358
    31. CL apan 32 is connected via pipelines 39, 40 with limiters 16, 15, respectively.
    In the second embodiment of the invention, the Restrictor 16 is mounted in the body of the hydraulic cylinder 3 in the zone of expansion of its gland 11 and connected by a C in6 port 17 of the supply valve to the chamber 14 of the hydraulic cylinder 3 .....
    The device works as follows.
    The initial position is when the car 2 is in the lower position, the valve 32 is in the upper position, as shown in FIG. 3, and the rod 5 of the hydraulic cylinder is in the fully retracted position. To lift the cab counterclockwise, it is actuated by the handle of the pump 29, with the result that pressurized fluid enters the Pipeline 40, and also passes through the restrictor 15 and the channel 27 to the Kayer 13. Goziliidra 3. The fluid passes through the hole 17, around the breech and through, the channel 18 enters the chamber 13. The pump continues to work until the rod 5 ne raises the cabin to the equilibrium center. As soon as the cabin passes through the center of equilibrium, the pump 29 is turned off, and then the cabin moves under its own weight. During this movement, the piston 12 pushes the LIQUID out of the chamber 14, which through the tube 28, the stop 16 ,. the pipe 39, the valve 32 and the return line 38 enters the tank 31. The height from which the cab 2 descends to the tilted position under the action of the normal weight is controlled by the handle 41 of the valve 32 changing the size of the nozzle 35.
    If the pump stops working at that time when cab 2 is in intermediate position between the working attachment and equilibrium center, the TPR is blocked in this position due to the fact that the check valve of pump 29 prevents the flow of fluid back to the pump. When the control valve 32 is in the upper position, and the pump 29 is activated to actuate the rod 5, then any liquid left in the chamber 14 of the hydraulic cylinder 3 leaves it and through the pipe 28, channel 27, stop 16, pipe 39, valve 32 and line 38 enters tank 31.
    权利要求:
    Claims (1)
    [1]
    In the case where cabin 2 is in one of the intermediate positions and at that moment a drop occurred: the pressure in the system due to the pump 29 or the pipeline failing, the limiter 15 is activated, causing the ball 23 to fit into its seat 22, thereby preventing reverse movement of the rod 5. This is due to the fact that as a result of a system malfunction a high-speed reverse flow is generated. From the chamber 13 to the tank 31, the pressure drop, the active nasarik 23, due to the flow rate liquid is sufficient to overcome the spring resistance, 25, as a result of which the ball 23 will be installed in the seat 22. The pressure created by the raised cab will hold the ball 23 in the seat 22 until the pressure in the chamber 13 exceeds the pressure in conduit 40. This occurs while cab 2 is at some point between the operating position and the equilibrium point. The cab is returned to its operating position by moving the valve 32 to the lower position and actuating the pump 29 to supply fluid to the chamber 14 of the hydraulic cylinder 3 via conduit 39. After passing the equilibrium center, the cab 2 switches off and the cab 2 moves further under own weight. Limiters 15; 16 are in the standby position to prevent the free fall of the cab 2 in the event of a system malfunction, with the limiter 16 servicing the cabin movement area from the fully unbalanced center of equilibrium, and the limiter 15 is from the center of equilibrium to the working position. The operation of the device made according to the second variant is similar to the described work. Claims. The hydraulic lifting cylinder DOUBLE action, comprising a housing with a base: it and a piston with a rod, is installed inside the housing and forms two working chambers, which means that, in order to improve reliability, it is equipped Two speed limits, each of which contains one longitudinal relative cylinder, an opening made at the Hc1 end of the body, and at least one transverse hole made at the base, while this food hole is made with a tapered part forming the valve seat, a ball A valve installed in each hole with the ability to interact with the said seat, Lcnb nnsf Fluid passage, air and crib, ciliidr and connected to the valve through the other cTdpoHy relative to this part of the spring part, installed in the hole, interacting with the ball and securing the valve. its retention outside the saddle under the foot conditions, the regulating element interacting with the spring element and providing am1y adjustment of the latter outside the body, directed the singing spring The second element interacting with the ball and holding it in the saddle, and the channel made in the cylinder body and connecting j-, 11 (the first hole section located on one side with its tapering part, with the cylinder chambers. Sources of information taken into account during the examination 1. Hydraulic equipment. Directory reference. VNIIGIDROPRYVOD. Part 1, 1967, p. 361-363 (prototype).
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2343521A1|1974-03-14|
    GB1420277A|1976-01-07|
    BE804185A|1973-12-17|
    CA981562A|1976-01-13|
    US3801151A|1974-04-02|
    FR2198445A5|1974-03-29|
    JPS4951477A|1974-05-18|
    JPS539345B2|1978-04-05|
    IT1000426B|1976-03-30|
    SE390838B|1977-01-24|
    ES418070A1|1976-03-16|
    NL7311606A|1974-03-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2306348A|1941-11-12|1942-12-22|Shell Dev|Hydraulic lift for forward-tilting cabs|
    US2472547A|1946-02-15|1949-06-07|Hpm Dev Corp|Servomotor mechanism|
    US2588520A|1946-10-12|1952-03-11|Minneapolis Moline Co|Hydraulically operated check valve mechanism|
    US3074384A|1959-07-08|1963-01-22|John S Pilch|Pilot-operated ball check valve in cylinder head|
    US3228658A|1963-12-11|1966-01-11|Applied Power Ind Inc|Hydraulic lift|US3958659A|1974-04-12|1976-05-25|Ford Motor Company|Cab tilting mechanism for trucks|
    US3985194A|1974-08-30|1976-10-12|Applied Power Inc.|Tilt cab power stream and valve control therefor|
    US4026113A|1976-06-01|1977-05-31|Sherman Clarence A|Tilting cab control apparatus|
    ES453731A1|1976-11-27|1977-11-16|Pedro Roquet S A|Tilting cab device for vehicles|
    US4200031A|1978-03-02|1980-04-29|Applied Power Inc.|Locking cylinders|
    DE3043590C2|1980-11-19|1984-12-20|Daimler-Benz Ag, 7000 Stuttgart|Hydraulic tipping device for the driver's cab of a truck|
    US4410056A|1981-05-27|1983-10-18|Paccar Inc.|Hydraulic cab tilting system having full locking with controlled free-fall|
    FR2551805B1|1983-09-08|1988-06-10|Eljika Ste Nle|EMERGENCY SAFETY CLOSING DEVICE, ESPECIALLY FOR USE IN A HYDRAULIC CIRCUIT OF TIPPER OF AN AGRICULTURAL MACHINE|
    US4739854A|1987-01-20|1988-04-26|Hein-Werner Corporation|Hydraulic fluid pump assembly for use in truck cab tilt apparatus|
    DE4436089A1|1994-10-10|1996-04-11|Gerd Baer|Device for pivoting a first part of a folding side wall relative to a second part|
    US20090158624A1|2007-12-19|2009-06-25|Vermeer Manufacturing Company|Trencher control system|
    US8191668B2|2008-08-07|2012-06-05|Caterpillar Inc.|Mounting assembly for emissions control system|
    KR101500039B1|2012-12-11|2015-03-06|현대자동차주식회사|A Front Panel Open-Closing System Actuated with Cab Tilting|
    US9404323B2|2013-03-13|2016-08-02|Forum Us, Inc.|Emergency cylinder lowering circuit with regenerative hydraulics and burst protection|
    DK178959B1|2015-09-07|2017-07-03|Thor-Lem As|Double acting hydraulic actuator|
    KR101745141B1|2015-09-24|2017-06-08|현대자동차주식회사|Tilt locking apparatus of truck cab|
    CN108657994A|2017-03-28|2018-10-16|宝山钢铁股份有限公司|Bogie clamshell driver's cabin digs failure emergency maintenance device|
    DE102018104587A1|2018-02-28|2019-08-29|Jungheinrich Aktiengesellschaft|Line breakage protection for a hydraulic cylinder|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US28487472A| true| 1972-08-30|1972-08-30|
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