69results about How to "Improve roll resistance" patented technology

The invention discloses a suspension device in front of a vehicle driving cab, relating to the technical field of vehicle shock absorption. The suspension device comprises a transverse stabilizer bar (10) and a first suspension device, wherein the first suspension device is arranged at the end part of the transverse stabilizer bar (10) and comprises an upper bracket (1), a shock absorber (5), an overturning arm (12) and an overturning seat (6). The suspension device in front of the vehicle driving cab is characterized in that the overturning arm (12) is located at one side of the transverse stabilizer bar (10), and the other end of the overturning arm (12) is fixedly connected with one end of the transverse stabilizer bar (10); the upper end of the shock absorber (5) is connected with the upper bracket (1), and the lower end of the shock absorber (5) is connected with the transverse stabilizer bar (10); the bottom of the upper bracket (1) is connected with the overturning arm (12); and the end part of the transverse stabilizer bar (10) is supported by the overturning seat (6). The invention also discloses a heavy vehicle with the suspension device in front of the vehicle driving cab.

A new method for designing a tire comprises the steps of laying up a tire having a stiff lower sidewall portion (18b) that has a high modulus apex (17) and a high turn-up (16a) and a concave shape, a flexible upper sidewall portion (18a) that is decoupled from the tread (22). The tread (22) is supported by a wedge (21) and extended belts (20) to substantially eliminate lateral curvature. The tire of the invention also has a rho_m that comprises 60% of the section height (SH) of the tire and a shoulder radius that defines a convex shape in upper sidewall portion (18a).

Provided is a pneumatic tire which is improved in a rolling resistance and a ride comfort in normal running without damaging a run flat durability.

It is a pneumatic tire provided with a bead core, a carcass layer, a tread rubber layer, an inner liner, a side reinforcing layer and a bead filler, characterized by using a rubber composition (a) which contains (A) a rubber component and (B) a filler and which has a dynamic storage modulus (E′) of 10 MPa or less at a dynamic strain of 1% and 25° C. and a Σ value of 5.0 or less in a loss tangent tan δ at 28 to 150° C. in the physical properties of the vulcanized rubber.

The invention relates to a single-axle bogie of a straddled-type single-rail vehicle with rotating arm type swing bolsters. The single-axle bogie of the straddled-type single-rail vehicle with the rotating arm type swing bolsters comprises a pair of traveling wheels, two pairs of guiding wheels, a pair of stabilizing wheels and a framework for mounting the traveling wheels, the guiding wheels and the stabilizing wheels; wherein the framework is 'square'-shaped and comprises side beams and cross beams; two pairs of swing bolsters are symmetrically arranged above the cross beams of the framework in the transverse direction; the swing bolsters have rotating arm type structures; the inner ends of the swing bolsters are connected with the cross beams of the framework through rotating joints and rotate in the side rolling direction; and an air spring is arranged between the outer end of each swing bolster and the frame in the vertical direction. Compared with the prior art, the single-axle bogie of the straddled-type single-rail vehicle with the rotating arm type swing bolsters has the characteristics that vertical buffering is realized by the rotating arm type swing bolsters and the air springs, and the vertical stability is good; transverse buffering is realized by a boom, and the transverse stability is good; by the boom, deflection between a vehicle body and the bogie in the curve is adapted, and the curved passing ability is good; by the rotating arm type swing bolsters and side rolling resisting springs, side rolling resisting rigidity is provided, and the anti-roll ability of the vehicle body is improved; and the height of a floor surface of a passenger room can be greatly reduced.

The invention discloses a layered control vehicle anti- rollover method and a multi-axle distributive driving vehicle. A layered control structure is adopted; an upper-layer controller performs combined control on a driving lateral inclination moment and differentiated braking based on a slip-form variable-structure method; a lateral inclination angle is selected as a main reference index for anti-rollover control; difference between an ideal lateral inclination angle and a real lateral inclination angle and difference between an ideal horizontal swinging angle and a real horizontal swinging angle are adopted as inputs; the driving lateral inclination moment and a differentiated braking rotation torque value are output; a middle-layer controller realizes reasonable distribution of the driving lateral inclination moment among each hanging rack execution mechanisms based on an effective set method; finally, a lower-layer controller performs driving anti-slipping control special for a wheel slipping condition which can be caused by middle-layer control; and negative influence to wheel longitudinal stress caused by vehicle force change is eliminated. By adopting the layered control structure, advantages of two anti-rollover methods can be fully exerted; and meanwhile, the driving stability of the vehicle can be further improved by combining with vehicle anti-slipping control.

The invention discloses a two-manner switchable active control suspension. The two manners include the first manner, namely, an active suspension manner in which suspension actuator hydraulic cylinders are independently controlled, and the second manner, namely, an active interconnected suspension manner in which a left hydraulic cylinder and a right hydraulic cylinder are controlled in a diagonal interconnected manner. Diagonal connection oil ways of coaxial actuator hydraulic cylinder cavities can be controlled to be opened and closed through a manner switching valve. The two-manner switchable active control suspension can be switched between the first manner and the second manner. When the lateral acceleration borne by an automobile is lower than a threshold value, the manner switching valve is closed, the oil ways through which the cavities of the left hydraulic cylinder and the right hydraulic cylinder are connected in the diagonal manner are cut off, electronic control hydraulic servo valves independently work at the same time and independently control operation force output, and the two-manner switchable active control suspension enters the active suspension control manner so that comfort can be improved; when the lateral acceleration reaches the threshold value, the manner switching valve is opened, the upper cavities and the lower cavities of the left hydraulic cylinder and the right hydraulic cylinder are interconnected in a crossed manner, and the two-manner switchable active control suspension enters the active interconnected suspension manner. The coaxial suspension can work through the electronic control hydraulic servo valve on only one side, and therefore the anti-roll performance is improved.

The invention relates to the technical field of railway vehicles, and provides a railway vehicle bogie frame, a railway vehicle bogie and a railway vehicle. The railway vehicle bogie frame comprises afirst end beam, a second end beam and a box beam arranged between the first end beam and the second end beam. The box beam comprises a motor box and gear cases. The motor box is connected with the first end beam and the second end beam through the gear cases. According to the bogie frame, the motor box and the gear cases are integrated on the bogie frame, accordingly, a motor installing base, a gear case hanging rod base and other structures on an original bogie frame are eliminated, and the bogie dismounting and mounting efficiency is improved. In addition, additional arrangement of the motor box and the gear cases on the bogie frame base is not needed, accordingly, the height between a railway vehicle floor and the ground can be reduced, the distance between the railway vehicle floor ofthe railway vehicle and the ground is reduced, and the lateral rolling resisting capability of the railway vehicle is improved.

The invention discloses an all-wheel 360-degree steering unmanned platform vehicle. The unmanned platform vehicle is composed of a chassis, a suspension mechanism, an interconnection mechanism, a steering mechanism and a driving mechanism. The suspension mechanism is composed of an upper pull rod, a lower pull rod and a shock absorber, the interconnection mechanism is composed of a left interconnection guide rod, a right interconnection guide rod, a left triangular rod, a right triangular rod and an interconnection spring, the steering mechanism is composed of a support, a steering motor, a steering shaft, a steering arm, a steering knuckle and the like, and the driving mechanism is composed of a hub, a hub motor, a brake disc and a brake caliper. The driving mechanism is connected with the steering mechanism and connected with the chassis through the suspension mechanism. The front steering mechanism and the rear steering mechanism in the advancing direction of the unmanned platform vehicle are interconnected through an interconnection mechanism. Each wheel of the unmanned platform vehicle can be independently driven and braked, 360-degree steering is achieved through a steering motor, and driving, braking and steering are all linearly controlled; meanwhile, suspension interconnection can be achieved, high maneuvering performance and driving stability are achieved, and universality is high.

The invention provides a disconnectable automobile semi-active transverse stabilizer bar system. The disconnectable automobile semi-active transverse stabilizer bar system comprises a stabilizer bar,an electromagnetic clutch, a magneto-rheological damper and a controller. The stabilizer bar comprises a left half bar and a right half bar, one end of the left half bar is installed on a vehicle suspension lower swing arm through the magneto-rheological damper, one end of the right half rod is mounted on the vehicle suspension lower swing arm, the controller controls the electromagnetic clutch toconnect or disconnect the left half rod and the right half rod, and the controller controls the magneto-rheological damper to generate damping force according to the running parameters of the vehicle. One end of the right half rod is mounted on the vehicle suspension lower swing arm through a vertical connecting rod. According to the invention, three different working modes of no stabilizer bar,passive stabilizer bar and semi-active stabilizer bar can be realized. Under the condition that a direct power source is not needed, the torque of the semi-active stabilizer bar can be changed in realtime along with side tipping of the vehicle body through current change, and the stability and smoothness of the vehicle body are improved.

The invention provides a semi-independent suspension with inclined leaf springs and belongs to the field of automobile engineering. The suspension comprises a frame, a half axle, and two semi-independent suspension devices on the two sides of the frame; the suspension device on each side comprises four inclined leaf springs; the first and fourth inclined leaf springs are symmetrical about the half axle, while the second and third inclined leaf springs are symmetrical about the half axle; the line of intersection of longitudinal symmetrical central planes determined by the first and fourth inclined leaf springs is parallel to or collinear to the line of intersection of longitudinal symmetrical central planes determined by the second and third inclined leaf springs. According to the semi-independent suspension, the wheels on the left and right two sides are directly connected without a hard shaft, and therefore, the semi-independent suspension is better than a traditional non-independent leaf spring suspension in manipulation stability and driving smoothness. Meanwhile, four leaf springs connected in parallel are capable of effectively bearing and alleviating impact to achieve better bearing capability and reliability; in addition, the distance between the bearing centers on the two sides and the steering range of the wheels are increased, and therefore, the whole vehicle is enabled to be better in low-speed flexibility.

The invention discloses a photoelectric vehicle height sensor, comprising a connection cable, a case, a shaft, a photoelectric coupling element and a blanking disc, wherein the bottom of the case is provided with the connection cable, the connection cable is connected with the photoelectric coupling element arranged inside the case, the shaft is arranged on the case and is sheathed into the photoelectric coupling element, a disc and the blanking disc are arranged on the shaft, one end of the blanking disc is arranged in a groove of the photoelectric coupling element, the disc is arranged in the blanking disc, and a slot is arranged at the edge of the disc. The photoelectric vehicle height sensor disclosed by the invention has the characteristics that vehicle height can be regulated at any time, the vehicle height is maintained to be constant and not to vary along with the change of loads, wheel suspension stiffness can be adjusted when an automobile starts, steers and brakes and the loads of front, rear, left and right wheels vary correspondingly, the anti-pitching capability and the anti-skewing capability of the automobile are improved, and the vehicle height can be maintained to be constant basically.

The invention relates to a honeycomb-spraying paper-plastic composite book cover. The book cover contains a piece of glossy paper and a plastic film; the honeycomb-spraying paper-plastic composite book cover is formed by combining the piece of glossy paper, the plastic film and a sprayed network, wherein a honeycomb network is sprayed on the back of the glossy paper; the honeycomb network is formed by solidified resin adhesive or solidified clear lacquer; and honeycomb grooves are formed on the back of the honeycomb network and the back of the glossy paper; and the front of the glossy paper is combined with the plastic film. The preparation method of the honeycomb-spraying paper-plastic composite book cover comprises the following steps: printing the glossy paper, spraying the honeycomb network, solidifying the honeycomb network, and combining paper and plastic. The resin or paint honeycomb network is sprayed and solidified on the back of the glossy paper of the honeycomb-spraying paper-plastic composite book cover; and as the solidified resin or paint honeycomb network has good strength, the curling resistance of the book cover is increased.

The present invention provides a tire having a tire tread comprising a cap tread and a base tread, use of which makes it possible to prepare for future decrease of petroleum supply, and further, can improve rolling resistance, steering stability and rubber strength in favorable balance, as compared with a tire prepared by using a rubber composition for a tread or a tire prepared by using a rubber composition for a base tread, which mainly comprises materials derived from petroleum resources. The tire has a tire tread comprising a cap tread and a base tread, the base tread being prepared by using a rubber composition for a base tread comprising 25 to 80 parts by weight of silica on the basis of 100 parts by weight of a rubber component comprising a natural rubber, and a thickness of the base tread being 17 to 50% of the overall thickness of the tire tread.

An automotive double-front-axle structure adopting non-independent oblique leaf spring suspensions comprises a frame, a first front axle, a second front axle and a steering system, wherein each of the two front axles comprises two oblique leaf spring suspensions, an integral axle and a trapezoid steering mechanism; each oblique leaf spring suspension comprises four oblique leaf springs, the first oblique leaf spring and the fourth oblique leaf spring are symmetrical about the axle, and the second oblique leaf spring and the third oblique leaf spring are symmetrical about the axle, and an intersecting line of longitudinal symmetric center surfaces determined by the first oblique leaf spring and the fourth oblique leaf spring is parallel to or collinear with an intersecting line of longitudinal symmetric center surfaces determined by the second oblique leaf spring and the third oblique leaf spring. Compared with a conventional double-front-axle structure adopting non-independent longitudinal leaf spring suspensions, the automobile double-front-axle structure has high bearing capability, the positional parameter variable quantity of wheels can be reduced, the bearing center distance of the leaf springs is increased, and the abnormal wear of the tires is reduced; the wheel steering range is increased, and a whole automobile has better low-speed flexibility.

The embodiment of the invention provides a framework, a bogie and a rail vehicle; the framework comprises two side beams, at least one cross beam and two extension beams, and the two side beams are oppositely arranged; the cross beam is connected with the two side beams; and the two extending beams are arranged on the sides, deviating from the cross beam, of the two side beams correspondingly, the two extending beams are coaxially arranged, secondary suspension mounting bases are arranged on the extending beams, and the secondary suspension mounting bases are used for being connected with secondary suspension. According to the embodiment of the invention, the extension beams are arranged on the sides, deviating from the cross beams, of the side beams, and the secondary suspension mounting bases are arranged on the extension beams, so that the span between the two secondary suspensions on the bogie is increased, and the side rolling resistance of the bogie is improved.

The four-wheel motorcycle consists of two parts of dragging head and body hinged via steering gimbal. The front part of the dragging head is one high-strength collision-proof stereo trussframed struture with steering shaft, steering wheel and bevel gear in the upper part as well as clutch, brake and throttle pedal in the lower part. The bevel rack meshes with the bevel gear is mounted on the cantilever of the dragging head. The driver applies steering torque to the steering wheel for turning. The present invention may be used to replace available two-wheeled and three-wheeled motorcycles as one countryside transportation tool.

The invention relates to the technical field of cable processing, in particular to a wear-resistant anti-rolling cable material. When the wear-resistant anti-rolling cable material is used in a special industry, the wear resistance and the anti-rolling ability of the cable can be improved, damage of a cable protecting cover or a core skin is relieved, the service life of the cable is prolonged, and accidents such as disconnection or short-circuit are reduced; and the wear-resistant anti-rolling cable material is prepared by mixing and then extruding polyvinyl chloride resin, dioctyl phthalate,a stabilizer, a high-temperature plasticization agent, wear-resistant powder, nano emery grit, antimonous oxide, nano active light calcium carbonate, polyethylene, a colorant, a lubricant and an antioxidant.