Steering mechanism of transport vehicle

FIELD: transportation.

SUBSTANCE: invention is related to steering mechanisms of wheel transport and traction machines, and may also find application in motor industry, tractor construction, machine-tool construction, instrument making, production of weight-lifting machines, where mechanisms are required with preset patterns of their separate work members movement. Steering mechanism comprises tooth gear with master gear (1) and tooth rack (6). Tooth rack (6) is made in the form of two parallel parts that move one along each other. Teeth (7) of racks are installed with the possibility of alternate engagement with gear in radiuses of its dividing circumferences, which makes it possible to obtain an alternation transmission ratio.

EFFECT: makes it possible to improve controllability of transport vehicle due to provision of optimal pattern for variation of transmission ratio of rack steering mechanism, and also to increase traffic safety.

4 dwg

 

The invention relates to steering mechanisms for wheeled vehicles, and may also find application in machine tools, instrumentation, lifting machines, where the necessary arrangements with preset movement patterns of their individual Executive links.

Known steering mechanism of the vehicle containing the transmission gear with the leading conical or pyramidal gear which engages with a toothed rack. Teeth slats spaced across the width of the slats so that they provide their engagement with the gear teeth on different radii of its dividing circles, which allows to obtain variable gear ratio (see A.S. No. 1142348, MKI462D 3/12, publ. 28.02.85 year).

The disadvantage of this design is that the change of gear ratio in low range, limited by the height of a gear tooth, and, therefore, difficult to provide different patterns of change gear ratio of the steering mechanism.

The technical result of the invention is to improve the controllability of the vehicle by ensuring optimal patterns of change in the gear ratio of the gearing.

Summary of the invention in that the steering mechanism of the vehicle containing the transmission gear with a pinion located in the toe is the situation with the rack, characterized in that the toothed rack is made in the form of two independent parts, along with the ability to move relative to each other, with the teeth of the racks are made different in height with the possibility of changing the gear ratio according to certain patterns.

Leading gear can be made conical, or consisting of several cylindrical gears of different radius dividing the circumference, or a combination. Rake is designed as two independent parts, moving according to a given law relative to each other in one plane. Teeth Reiki (both one and the other parts) are alternate engagement with the gear on the radius of its dividing circles that provides the necessary radii of rotation of the steered wheels (correct kinematics of rotation, and traffic safety).

The range of change of gear ratio rack and pinion type differential steering mechanism with combined gear is determined by the ratio between the largest and smallest radii of engagement, and the pattern of change in the gear ratio of the mechanism is established by the location of the teeth of the rail width. These parameters are selected optimal conditions of controllability and stability of wheeled vehicles.

what a figure 1 shows the steering mechanism combined (cone + cone) gear; figure 2 - cross section A-a in figure 1; figure 3 is a mechanism combined (cone + cylindrical + bevel) gear; figure 4 - cross section b-B figure 3.

The mechanism contains a combination gear 1 mounted on the control shaft 2 and mounted on bearings 3 and 4 in the housing 5 is located within the rail 6 with the teeth 7. Figure 2 shows the clamping rail 6 to the gear 1 spring 8 and crackers 9. The engagement of the teeth 7 is controlled by spacers 10 and nuts 11.

The mechanism works as follows.

The driver wheel of the vehicle by turning the steering wheel, turns associated with the last shaft 2 of the steering mechanism and installed it combined gear 1, which siteplease teeth 7, moves the rail 6 of the mechanism.

When moving the rail 6 to the right into engagement with the leading combination gear 1 take alternately the teeth 7 of the two independent parts of Reiki, located at different distances across the width of the slats, and engage with the gear 1 at different radii her dividing the circumference, thereby giving two parts Reiki different move. Therefore, when turning the steering wheel and the leading combination gear 1 area of contact of the gear teeth with the teeth of the slats are moved along the length of the pinion, which is accompanied by change of the radius of the dividing okruzhnostiami two parts Reiki with the pinion.

It changes the gear ratio of the mechanism are determined by the radius of the pitch circle of the leading combination gear, which currently engage with the teeth of the two parts of the rail.

In comparison with the known steering mechanisms wheeled vehicles, the proposed design allows you to extend the limit change gear ratio and get different pattern of this change, to improve traffic safety, the comfort of the vehicle and the reliability of its operation.

The steering mechanism of the vehicle containing the transmission gear with a pinion which engages with a toothed rack, wherein the toothed rack is made in the form of two independent parts, along with the ability to move relative to each other, with the teeth of the racks are made different in height, with the possibility of changing the gear ratio according to certain regularities.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in systems with piston, slider and other units. Proposed mechanism has housing, guides 2, slider 3, output shaft 4 with circumferential section 5 of gear rim alternately engaging with two sections 6, 7 of rim (racks) arranged from side of slider 3 with teeth orientated in opposite direction. End working teeth of edges of rim sections 5-7 are made with body truncation surface having at least one bend and orientated with tilting at acute angle by one extremity to surface of point and by other extremity, square to one of end faces. Surface of truncation of tooth body together with cut of top surface on opposite sections 5 and 6 or 5 and 7 of rim is orientated so that corresponding pairs of working teeth are aligned with ridges at insignificant clearance at opposite relative displacement.

EFFECT: reduced level of vibrations, eliminated possibility of wedging.

6 cl, 21 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to lever-tooth mechanisms with rack and it can be used to drive mechanisms of slotting machine, automobile windshield wiper, brush cleaner of screens of grain-cleaning machines, in automatic machines, etc. Proposed mechanism contains base, toothed wheel and crank hinge-mounted on base for rotation, and toothed rack engaging with toothed wheel. Lever with guide member is hinge-mounted on axle of toothed wheel. Guide member engages with rear side of toothed rack forming translational pair. Guide member is made in form of roller hinge-mounted for rotation on axle installed on free end of lever provided with thread. Axle of roller is provided with through cross hole to pass threaded end of lever. Roller is held on lever by nuts arranged from outer and inner sides of roller to adjust and fix radial clearance in meshing between rack and toothed wheels.

EFFECT: improved operating characteristics of mechanism.

2 dwg

Motion converter // 2308603

FIELD: mechanical engineering, particularly combustion engines, pumps and positive displacement compressors, namely mechanisms, which covert reciprocal movement into rotation and vice versa.

SUBSTANCE: motion converter comprises four cylinders grouped in pairs. Pistons of opposite cylinders are connected with each other through fixed bar. The converter has the first and the second pair of fixedly connected parallel toothed racks brought into engagement with corresponding segmental gear-wheels fixedly connected to one output shaft. In each segmented gear-wheel teeth extend for less than half of 180° pitch circle. Segmented gear-wheels cooperating with corresponding toothed racks are shifted through predetermined angle, preferably 90° angle, one relatively another.

EFFECT: increased performance.

3 cl, 5 dwg, 1 tbl

FIELD: the invention refers to the field of machine building namely to transformers of alternate/reciprocal motion into rotary and vice-versa and may be used in piston engines, pumps, compressors and other gears.

SUBSTANCE: the transformer is a planetary toothed mechanism consisting of a non-rotating central pinion with inner toothed gearing making alternate/reciprocal motion relatively to the axle rotating together with firmly connected with it from one side and interacting with the central pinion-satellite. The length of the toothed rim of the satellite is two times smaller then the length of the toothed rim of the central pinion, of the link or of the mechanism providing continuous engagement of the teeth of the central pinion and the satellite. The link and the mechanism are fulfilled in such a manner that install marginally allowable distance between the positions of their joining with the central pinion and with the satellite not installing the maximum allowable value of this distance. The central pinion and the satellite have figured different profile according to their toothed rims.

EFFECT: increases the coefficient of efficiency of transformation of the alternate/reciprocal motion into rotary and vice-versa and simplifies the construction of the toothed transformer.

10 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: according to invention, body 10 forms prismatic chamber 12 whose cross section is oval of odd order formed from arcs 34, 36, 38 with first smaller radius of curvature and arcs 40, 42, 44 with second, larger radius of curvature changing continuously and differentially one into the other. Thus, corresponding cylindrical parts of inner surface of chamber are formed. Chamber 12 accommodates rotating piston 60 whose cross section forms oval of the order smaller by 1 than order of chamber 12. Opposite parts of side surface are formed on rotating piston 60, one of which rotates in part of inner surface of radius of curvature equal to said part and the other adjoins opposite part of inner surface to slide along surface. rotating piston 60 divides chamber 12 in any position into two working spaces 78, 80. Instantaneous axes of rotation 112, 114 of rotating piston 60 are determined on middle plane of piston being fixed for a short time. Working agent to set rotating piston 60 into motion is periodically introduced into working spaces. Rotating piston 60 rotates in each phase of its motion in one of opposite parts of its side surface 70 in corresponding part of inner side surface 62 of chamber around corresponding instantaneous axis of rotation 112 and slides by opposite part of its surface 72 along corresponding opposite part of inner side surface 54 of chamber 12 to stop, i.e. until it comes into extreme position. Then, to execute following phase of movement, instantaneous axis of rotation jumps from previous position into second possible position 114 relative to piston and is fixed in this position for a short rime. Driven or driving shaft 102 is in engagement with rotating piston 60. To prevent kinematic ambiguity of instantaneous axis of rotation in extreme position, instantaneous axis of rotation is mechanically fixed in each extreme position for a time (Fig.1).

EFFECT: improved efficiency of machine in operation.

20 cl, 79 dwg

Gearing device // 2289046

FIELD: mechanical engineering.

SUBSTANCE: gearing device comprises two gear racks and gear wheel. The recess is provided between the racks (26) and (28) to prevent gear wheel (10) against the contact with both of the racks simultaneously. The adapting gear member between two racks is defined by the convex gear arc. When gear wheel (10) engages adapting member (30), it disengages rack (26) immediately before the moment when it engages rack (28).

EFFECT: improved structure.

13 cl

FIELD: mechanical engineering.

SUBSTANCE: gear converter comprises nonrotating shaped gear wheel (1) with inner teeth engagement, which reciprocates with respect to semiaxle (3) that rotates together with shaped pinion (2) secured to the semiaxle from one side and cooperating with shaped gear wheel (1). The length of the gear rim of pinion (2) is twice as less as that of gear rim of shaped gear wheel (1). The continuous engagement of the teeth of shaped gear wheel (1) with pinion (2) is provided by means of the cooperation of cam (4) that is connected with pinion (2) with roller (8) freely rotating around its axis (9).

EFFECT: enhanced efficiency.

7 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: converter comprises the rack, gearing, output shaft, two overloading clutches, and thrusts. The rack connected with the pivot is in coincidence with the overrunning clutches which are in a staggered contact with conical gears. The movement of the conical pivots are limited by means of the pinion secured to the output shaft. The racks provided with the gearing and overrunning clutches are interposed between the two conical gearings.

EFFECT: simplified structure.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: device comprises rack, gears, output shaft, two overrunning clutches, and stops. The output shaft is inclined at an angle of 90° to the driving shaft. The gear engaging the rack is pivotally connected with the driving shaft. The faces of the gear abut against two overrunning clutches which are in a contact with the stop and conical gear pivotally mounted on the driving shaft. The conical gear is connected with the intermediate pinion secured to the output shaft. The intermediate pinion engages the conical gear secured to the driving shaft. The additional stop is secured to the shaft, set in the gear actuated by the rack, and housed by the flange. The device also has roller for keeping the space in the rack-gear engagement constant.

EFFECT: simplified assembling.

3 cl, 1 dwg

FIELD: mechanical engineering.

SUBSTANCE: gearing converter comprises single gearing frame with inner or outer gear cut, two gearing racks (5) and (16) whose ends are interconnected via intermediate sections that define smooth members for power pinion (13) from one gear rack to the other, locking roller (14) that rolls over the shaped surface, one driving rod (1), carrier (15) with locking roller (14) connected with the gear rack and mounted on power shaft (4), and power pinion (13). The intermediate sections of the gear frame are provided with rounds that are redial with respect to the axis of rotation of the gear rack.

EFFECT: expanded functional capabilities.

16 cl, 9 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to steering mechanism of road, air and water vehicles. Proposed steering mechanism contains at least two gear wheels secured on drive shaft, one of which is installed for interaction with driven gear rack mechanism. Said gear rack mechanism is made of at least two rack sector rigidly connected to each other and engaging with round driving gear wheels. Second gear wheel secured on drive shaft is non-round and is installed for engagement with driven non-round wheel secured on driven shaft coaxially with round driving wheel. Round driving gear wheels are installed for simultaneous engagement with corresponding rack sectors in ranges with equal gear ratios.

EFFECT: enlarged range of changing of gear ratio.

2 cl, 1 dwg

The invention relates to transport machinery, primarily for use in steering the departments hire

The invention relates to the field of vehicles, namely to the steering vehicles

FIELD: transport engineering.

SUBSTANCE: invention relates to steering mechanism of road, air and water vehicles. Proposed steering mechanism contains at least two gear wheels secured on drive shaft, one of which is installed for interaction with driven gear rack mechanism. Said gear rack mechanism is made of at least two rack sector rigidly connected to each other and engaging with round driving gear wheels. Second gear wheel secured on drive shaft is non-round and is installed for engagement with driven non-round wheel secured on driven shaft coaxially with round driving wheel. Round driving gear wheels are installed for simultaneous engagement with corresponding rack sectors in ranges with equal gear ratios.

EFFECT: enlarged range of changing of gear ratio.

2 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: invention is related to steering mechanisms of wheel transport and traction machines, and may also find application in motor industry, tractor construction, machine-tool construction, instrument making, production of weight-lifting machines, where mechanisms are required with preset patterns of their separate work members movement. Steering mechanism comprises tooth gear with master gear (1) and tooth rack (6). Tooth rack (6) is made in the form of two parallel parts that move one along each other. Teeth (7) of racks are installed with the possibility of alternate engagement with gear in radiuses of its dividing circumferences, which makes it possible to obtain an alternation transmission ratio.

EFFECT: makes it possible to improve controllability of transport vehicle due to provision of optimal pattern for variation of transmission ratio of rack steering mechanism, and also to increase traffic safety.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry, namely control over steering system. Proposed steering device comprises gearbox casing 3 made from aluminium or its alloy with hollow section, steering gear shaft 6 running in roller bearing of gearbox, gear 7 running on steering gear shaft, toothed rack 9 to be engaged with gear 7, guide device 10 of toothed rack arranged in aforesaid hollow section inside gearbox casing to allow the rack to slide along direction A.

EFFECT: reduced noise ease of adjustment.

27 cl, 29 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed hinged system comprises hinge 7 arranged partially in sealing bellows, rod with hollow space 6 linked with hinge 7, sealing bellows that constricts inner space and gastight joint 13. Hinge 7 has case 8 and hinge pin 9 arranged to move relative to said case. Gastight joint 13 communicates hollow space 6 of rod 4 with inner space of sealing bellows and has one groove 15. Groove 15 is made in the hinge face side that faces rod 4, terminates in sealing bellows inner space and has radial outer end. Said radial outer end of hinge 15 terminates at a distance from hinge face side outer perimetre.

EFFECT: perfected gastight joint.

13 cl, 14 dwg

FIELD: machine building.

SUBSTANCE: friction bearing (7) consists of bushing (17) out of synthetic plastic with at least one circular groove (16) made on external periphery surface (15) of bushing, of circular-shaped elastic element (18) inserted in circular groove (16) and of couple of periphery, axially symmetrical and turned inside surfaces (21, 22). Bushing (17) also has two pairs of slots (23, 24) and (25, 26) each positioned so, that surfaces (21, 22) run between them along circumference; the slots facilitate corresponding surfaces (21, 22) travelling in radial direction inside/outside. Further, the bushing has at least one pair of internal periphery surfaces (27, 28) turned outside and passing from outside into radial direction relative to pair of surfaces (21, 22). Each surface (27, 28) forms a gap with corresponding external periphery surface from the side of teeth and from opposite to it side of a shaft of steer rack; the shaft is inserted and fixed in a through orifice formed with pairs of surfaces (21, 22) and (27, 28). The section of each surface (21, 22) comes into a sliding contact with a corresponding external periphery surface of the shaft of the steer rack, except for external periphery surfaces from the side of teeth and for opposite to it side of the shaft of the steer rack. There is also disclosed the rack-and-pinion steer including the above said friction bearing.

EFFECT: facilitating specified rigidity for shaft of steer rack in its radial direction and in axial direction of drive gear; also facilitation of movable support with low friction resistance in axial direction of shaft; reduced effect of relaxation of stresses due to creep strain and heat prehistory.

9 cl, 10 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, namely, to rack-type steering mechanisms. Proposed mechanism comprises case, gear, moving rack engaging with said gear, rack guide and elastic appliance arranged between said case and rack guide. Rack guide comprises cylindrical body with wide annular recess on outer surface and at least one annular narrow grooves on bottom surface of wide annular recess, its width being smaller than that of wide annular recess section. Rack guide comprises sliding support, endless annular flexible element and cylindrical sleeve with cutout. Said cylindrical sleeve is press-fitted in case bore while sleeve edge comes in contact with case inner edge surface that defines case limit bore.

EFFECT: longer life.

7 cl, 15 dwg

FIELD: transport.

SUBSTANCE: invention may be used in trackless vehicles with engine (automobiles). Proposed transmission gear has at least one spur gear 1, 2 and at least toothed device to be engaged with said spur gear 1, 2. Spur gear 1, 2 has teeth 11 arranged along a curve. Said curve feature curvature radius increasing monotonically in angular range of said curve above 90. Spiral, particularly logarithmic spiral, is a preferable shape of said curve.

EFFECT: compact and simple design, smooth run.

32 cl, 24 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Multilayer slide comprises support plate made from sheet steel, porous cermet layer made integral on support plate surface, and sliding layer. The layer is composed of composition based on synthetic resin filling cermet layer pores and covering it. Said composition comprises 5-30 wt % of barium sulphate, 1-15 wt % of magnesium silicate, 1-25 wt % of phosphate, 0.5-3 wt % of titanium oxide, PTFE resin making the rest. Said rack-and-pinion steering mechanism comprises gearbox, gear, and rack to engage with said gear. Rack rests on its guide to slide thereon. Note here that rack guide is pressed to rack by spring. Rack guide comprises main body with its surface getting into sliding contact with gearbox surface, and said multilayer slide with its thrust plate secured to rack guide body.

EFFECT: increased wear resistance of tire.

9 cl, 6 dwg, 4 tbl

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