Suspension idler wheels caterpillar tractor
(57) Abstract:The invention relates to crawler tractors with semi-rigid suspension and adjustable track chain tension using the tension wheel. The device comprises two hollow longitudinal beams pivotally connected with the frame of the tractor in the rear. The beam is made in the form of a hollow tube of rectangular cross-section. Inside the beam is bearing the raised front part, in which the fixed axis idler wheels arranged symmetrically about the beam. The front portion includes a ledge for articulated connection with the tensioning device. Last using spherical emphasis and bracket attached to the outer plane of the beam. The rear portion is made hollow and with centering lugs, which make it move along the beam with optimum clearance. This portion contains the window, grasping the end of the stop, which is fixed in the threaded hole of the beam. Effect: simplified construction and reduced size of the device. 3 Il. The invention relates to crawler tractors with semi-rigid suspension and adjustable track chain tension using the tension wheel.Iswe sprung a balancer mounted on a moveable support frame of the crawler tracks, as well as passing mechanism. Rocker made one shoulder with a groove in its middle part. In the groove is located so that they can move in the longitudinal direction of the crawler device for securing the end of the balance sheet transverse leaf springs semi-rigid suspension of the tractor. The frame is also equipped with a stop limiting the stroke of the walking beam in the vertical plane.The disadvantage of this device is as follows.When moving single obstacle guiding wheel the efficiency of the device quite easily. However, if you subsequently hitting the obstacle of the first support roller, the diameter of which is smaller than the diameter of the idler, is a more intense effect on the spar. In addition, depending on the size and configuration of the obstacles to the return idler (fall) in the original position may coincide with collisions on the first support roller. In this case, the dynamics of the process increases.Also known suspension idler wheels caterpillar tractor (2), containing a hollow longitudinal beam of rectangular cross-section, idler wheel and bearing, the bearing axis of the idler wheel. Protivopolojnym end pivotally connected with the support, others also articulated longitudinal beam.The device provides tension on the track chain by acting on the tension wheel. In addition, when hit foreign object on the treadmill track chain device ensures trouble-free operation due to the rollback of the tension wheel and the deformation of the spring tensioner.The disadvantage of this device lies in its complexity and size. The path of the axis of the idler wheel is determined by the radius of the arc of a circle, i.e. the distance between the axes of the wheels and the axis of rotation of the support in the longitudinal beam. The latter contains enough spaced supports for the perception of vertical loads from a console located tensioner wheel.The invention consists in that in the suspension idler wheels caterpillar tractor containing a hollow longitudinal beam of rectangular cross-section, a tension wheel, a support, a bearing axis of the idler wheel and the associated longitudinal beam, a tension device consisting of a hydraulic cylinder pivotally connected at one end supported and the other named longitudinal beam, to simplify the design and reduce the size of the node axis idler wheels made the nuclear biological chemical (NBC connection with the tensioning device, the opposite end of the prop is located inside the longitudinal beams with the possibility of longitudinal movement with sites for contact with it and a window covering the end stop, which is attached to the longitudinal beam, and the tension wheel is made double, each of which is located at the ends of their axes symmetrically relative to the longitudinal beams.The invention is illustrated by drawings, where Fig. 1 shows a suspension idler wheels caterpillar tractor, side view; Fig. 2 - section a-a in Fig. 1 (enlarged scale) of Fig. 3 is a section along B-B in Fig. 1 (enlarged scale).The device comprises two hollow longitudinal beam 1, in rear of its parts pivotally connected with the frame of the tractor (not shown). On each of the beams 1 fixed rollers 2, the bracket 3 and the spring 4, the upper end of which supports the frame of the tractor. Beam 1 is made in the form of a hollow tube of rectangular cross-section. Inside the beam 1 is bearing 5 protruding from the tubes on the front part. Serving part of a support rigidly fixed axis 6 of the idler wheels 7, which are located symmetrically with respect to the beam 1. The front portion includes a protrusion 8 for articulated connection with the tensioning device. Stretch ustroystvo. Stop 11 by bracket 13 mounted on the upper surface of the beam 1. The rear part of the support 5 is made hollow and with centering lugs 14, which make it move along the beam 1 with a minimum clearance. This portion contains the window 15, covering the end of the stop 16, which is fastened in the threaded hole of the beam 1.When assembling the suspension with the initial number of links of the track chain stop 16 is installed in the window 15 in a predetermined position. In this case, the distance between the front wall of the box 15 should be not less than given value of the deformation of the spring 10, and a similar distance to the rear wall of the box 15 at least half step track chain.During operation of the tractor there is a constant wear and tear of the joints of the track chains. Compensation for wear is the periodic movement of the forward wheel 7 by the pressure oil in the hydraulic cylinder 9. After reaching the permissible wear of the track circuit emphasis 16 touches the rear wall of the box 15. The performance of the system is restored by removing one link track chain, then adjusting its tension.When hit foreign object in the tracked contour of the wheel 7 tends to move n shown).When the tractor load on the idler wheel 7 in a vertical plane and in a horizontal plane in the direction perpendicular to the direction of movement of the tractor is transmitted to the longitudinal beam 1 through the respective projections 14.Thus, the suspension idler wheel provides a reduction of the dimensions of the site and simplifies its design.Sources of information:
1. Auth. St. USSR N 1258753, B 62 D 55/30, 19852. C. M. Zabrodsky, A. M. feinleib and other Popular systems of tractors, Handbook, M., "Agropromizdat 1986, page 50 prototype. Suspension idler wheels caterpillar tractor containing a hollow longitudinal beam of rectangular cross-section, a tension wheel, a support, a bearing axis of the idler wheel and the associated longitudinal beam, a tension device consisting of a hydraulic cylinder pivotally connected at one end supported and the other named longitudinal beam, characterized in that the axis of the idler wheels are made symmetrical with respect to its middle and attached to the end supports, the end supports are made with the tab for articulated connection with the tensioning device, the opposite end bearing is located inside the longitudinal beams with the possibility of longitudinal peremeshany is the left main coronary artery, and the tension wheel is made double, each of which is located at the ends of their axes symmetrically relative to the longitudinal beams.
FIELD: mechanical engineering; running gears.
SUBSTANCE: proposed vehicle running system has support frame forming round support for running belt which can rotate around axle, flexible running belt and running belt stretching unit containing one or more rollers to stretch running belt. System has one running arrangement in which flexible running belt is held on support frame forming essentially round wheel-like surface which can be changed into stretched state in which rollers come into engagement with belt stretching it from one above-indicated arrangement into stretched state to form one or more other running arrangements of system.
EFFECT: provision of running system suitable for various running means.
8 cl, 30 dwg
FIELD: automotive industry.
SUBSTANCE: proposed method consists in increasing track ground contact area at preset track length by increasing track width on low load-bearing surfaces and making track edges bevelled. Track ground contact area surface features R-radius-whistler. Track width features convex ground contact surface with radius R. Support rollers can be moved out, along with tract contact area, on circular arc by turning track carriages on frame axles. Caterpillar drive comprises frame with guide wheel and final drive wheel, carriages with shock absorbers and support rollers, rolls and track chains. Track chain consists of pin-jointed tracks with ground grousers that features flanged outer surface. Support rollers are fitted on carriage to move out on circular arc level. Paired support rollers carriages can rotate on frame axles to get track roller ground contact surface located on radius R and are furnished with drive cylinders. Note that guide wheel can move closer to final drive wheel to move track ground contact surface out along radius R with support roller fixed axle.
EFFECT: increased cross country capacity.
6 cl, 10 dwg
SUBSTANCE: invention refers to the field of machine building, namely to hydraulically driven crawler shovels. Hydraulic drive of crawler shovel comprises power pumps, control pump, distributor, hydraulic motors of stroke, power hydraulic lines, hydraulic lines of servocontrol with control units, hydraulic cylinders of caterpillar belt tension. Besides between each hydraulic cylinder of caterpillar belts tension and according power hydraulic lines of stroke, there is an additional circuit included, made of two drain check valves, discharge check valve, safety valve and hydraulic lines of servocontrol, at the same time piston cavity of hydraulic cylinder of tension of caterpillar belts is connected to discharge cavity of safety valve and through discharge check valve with discharge hydraulic line of servocontrol, and stem cavity - to drain cavity of safety valve and through drain check valves with power hydraulic lines of stroke.
EFFECT: invention provides for automatic tension of caterpillar belts independently on load on master wheels.
SUBSTANCE: invention relates to machine building, particularly, to vehicles. Proposed method comprises pre-tensioning idle run by guide wheel, creating idle run curvilinear trajectory convex upwards, forming centrifugal forces of inertia, equalising idle run gravity by force of inertia proportional to tank motion speed square. Proposed device comprises caterpillar chain, carrier rollers, guide wheel and tensioning mechanism. Carrier rollers of caterpillar chain idle run are mounted on tank body in vertical plane along the arc to adjust pre-tensioning of caterpillar chin by guide wheel.
EFFECT: reduced resistance to rolling of caterpillar chain idle run.
2 cl, 2 dwg
SUBSTANCE: proposed tensioner comprises tensioning wheel running in bearings. Yoke with central bore is arranged on supports. Said bore receives caterpillar tensioning nut screwed on coupling bolt. Said nut tightens via washer cushioning spring thrusting against flange with shaped opening to receive coupling bolt. Centering bracket is arranged on frame with accommodate cushioning spring tightening nut. Nut has opening to accommodate another end of caterpillar tensioning nut. Cushioning spring consists of two assembled springs with separation washer arranged there between with central opening. Coupling bolt passes through said opening. Said spring has lower rigidity compared with second spring, on tensioning wheel side.
EFFECT: reduced dynamic loads on tensioning wheel and caterpillar.
3 cl, 3 dwg
FIELD: transport machinery.
SUBSTANCE: this vehicle contains a framework, guided front wheels connected to a steering shaft, back driving wheels equipped with a semicrawler unit at each sideboard. The semicrawler unit includes a crawler, an idler wheel mounted on a balancer, and hydraulic control system of the idler wheel. Hydraulic system includes two-sheet hydraulic cylinders guided by on/off distribution valves, and hydraulic lines connecting hydraulic cylinders sheets to the distribution valves. Above-piston hydraulic cylinder sheets are equipped with shock springs. Distribution valves are controlled by a spring-return jaw, and are connected to a master form moved by a vehicle steering shaft. Hydraulic system is equipped with pump and pressure flap, as well as pump and drain pressure hydraulic lines. Each on/off distribution valve has four ports. First line is connected to pump delivery section, the second line is connected to drainage, the third line is connected to the above-piston hydraulic cylinder sheet, and the fourth line is connected to the hydraulic cylinder rod side. In its first position, the third line of the distribution valve is connected to the forth interconnecting hydraulic line. In its second position, the first line of the distribution valve is connected to the forth interconnecting hydraulic line, and its second line is connected to the third interconnecting hydraulic line. The master form is formed by two peripheral pits located symmetrically to its central axis.
EFFECT: enhanced vehicle manoeuvrability.
SUBSTANCE: invention relates to track idlers of harvester crawler trucks, for example self-propelled rice-and-grain harvesters and fodder choppers TRACK IDLER OF harvester crawler truck comprises wheel (1), rotating on two bearings (2) with stationary axle (3) fixed in rests (4) having guides (6) with rollers (10). Vertical play of wheel (1) is limited by planks (7) pressed from below to lower flanges of channel beams (8) of crawler truck frame by springs (9). On each guide (6) from the side of channel beam (8) of crawler truck frame, roller (10) is installed which rotates and rests on lower flange of channel beam. Under action of tensioner, wheel (1) moves on rollers (10) over lower flanges of channel beam (8) lower flanges of channel beam.
EFFECT: invention is aimed at lowering force for moving wheel guided over flanges of channel beams of crawler truck frame, as well as at reducing wear of coupled parts - guides and flanges of channel beams of crawler truck frame.
SUBSTANCE: invention relates to caterpillar vehicles including combat vehicle. Proposed tensioner incorporates planetary gearbox with no pinion carrier with tensioner crank fitted in reduction gearbox central opening. Crank lock is furnished with throw-out indicator. Tensioner indicator is made up of compact resistor coil with moving contact and tensioning electric indicator. Manual backup adjustment pin is arranged outside the vehicle board. Caterpillar track tensioning if performed to signal from driver control board.
EFFECT: compact design, ease of use.
3 cl, 3 dwg
SUBSTANCE: invention relates to automotive industry, particularly, to caterpillar forestry machine. Forestry machine comprises front and rear sections 2, 3, assembly of swinging axles 12 and caterpillar track 20. Front and rear sections are coupled by kingpin. Assembly 12 of swinging axles rests on chassis wheels 14, 15. Caterpillar track 20 runs around said wheels 14, 15 and auxiliary wheel 16 outside said assembly of swinging axles. Auxiliary wheel 16 runs in bearings at front and/or rear section so that when assembly 12 of swinging axles turns caterpillar track 20 is tensioned. Caterpillar track 20 is tensioned by, mainly, auxiliary wheel 16.
EFFECT: perfected caterpillar track.
14 cl, 7 dwg
SUBSTANCE: this assy comprises spring secured at road roller suspension. It is rigidly secured by web between pistons at machine body inner board. Spring rod is split-jointed with spacer with working surface follows a circle arc in symmetry about spring central axis to interact with roller fitted by spherical support on master lever axle fixed at balance beam locating axle.
EFFECT: compact design, reliable operation and ease of servicing.
3 cl, 4 dwg