77 results about "Off-Road Motorbikes" patented technology

A triple lip seal for reciprocating members, and especially for an inner cylindrical tube connected to a vehicle wheel and an off-road motorcycle or bicycle. The seal includes an oil side beam generally parallel to the axis of the reciprocating members and having at least two sealing lips for engaging the inner cylindrical tube and wherein the forces applied to the seal are balanced between the two lips to resist flattening of the sealing lips against the shaft and to enhance the service life of the seal. The seal also includes an air side beam having a third sealing lip engaging the inner cylindrical tube.

A motorcycle foot peg is constructed to absorb shocks and impacts that would otherwise be transmitted to a rider's foot during hard landings of a motorcycle. The impact and shock absorbing motorcycle foot peg has particular applicability to off-road motorcycles. The foot peg has a rigid mounting platform including a mounting plate from which a rigid foot support projects outwardly in cantilevered fashion. The foot support has a flat upper bearing surface and supports a foot pad formed of a resiliently compressible elastomeric material having a Shore A hardness of between about 30 and 60. A foot contact plate is located atop the elastomeric slab. The foot contact plate, the elastomeric slab, and foot support are connected together by bolts passing therethrough. The foot contact plate thereby resides in a floating relationship relative to the foot support and can move both toward the foot support and laterally relative to the foot support to cushion the rider's foot against shocks and impacts. Spacer washers may be provided about the shanks of the bolts to adjust a preload compression on the resilient pad.

A shroud, typically of an off-road motorcycle is provided. The motorcycle includes a fuel tank provided in an upper front portion of the motorcycle body. The shroud structure includes an upper shroud that extends along a side face of the fuel tank and covers the fuel tank, and a lower shroud disposed below the upper shroud. The upper and lower shrouds are detachably coupled to each other.

Protective footwear, such as a motorcycle or motocross boot, having a molded top gasket and / or a fold-over thermal barrier. The molded top gasket may be a substantially annular unitary piece or multi-piece construction of an elastomeric material, such as rubber, that snugly wraps around the wearer's lower leg or ankle when the footwear is worn. The fold-over thermal barrier is a piece of thermally resistant material on the outer surface of the footwear upper that extends over a portion of the rim and into the inside of the upper. One or more optional control pads also may be placed on the exterior surface of the thermal barrier.

An off-road motorcycle incorporating a swingarm assembly for pivotally supporting a rear wheel relative to a main frame portion of the motorcycle. Preferably, the swingarm includes right and left arms extending rearwardly from a forward connecting portion. Right and left rear wheel mount members are secured to the right and left arms, respectively, to rotatably support the rear wheel of the motorcycle. Preferably, the arms from the swingarm assembly are formed at least partially by a hydroforming process wherein the center of the arms has a width that is greater than the width of either a forward or rearward end of the arm. In addition, the forward ends of each of the right end left arms are bent inward such that the forward portion of the swingarm assembly is narrower than the rear portion of the swingarm assembly. Desirably, the hydroforming process permits the inner wall of the arms to be vertical and substantially planar, even along the region where the arms are bent. In addition, a vibration absorbing coating is applied to the wheel support members in a manner to be interposed between an inner surface of the wheel support members and the outermost portion of a hub of the rear wheel.

To ensure that a down frame in an off-road motorcycle body frame is lightweight, rigid and easy to weld, a down frame extending downward obliquely and backward from a main frame ahead of an engine is divided along its length into a down frame front portion and a down frame rear portion. Welding joins these portions, which abut each other in the longitudinal direction. The down frame front portion is a pipe wrought product formed by extrusion molding and the down frame rear portion is a casting. Since the down frame is welded along a straight welding line extending along its length, welding is easy. Since a main joint and a lower joint are provided integrally with the down frame rear portion as a casting, a separate gusset can be omitted.

The invention relates to a floating brake disc (1), particularly for a motorcycle, particularly an off-road motorcycle, which comprises an outer ring (2) which carries a brake band (23) and an inner ring (3) via which the brake disc (1) is connected to a wheel of the vehicle. According to the invention, at least one region (5) of contact, in particular a number of regions (5) of contact, between the outer ring (2) and the inner ring (3) is / are formed on a circular arc (6) extending, concentrically with the brake disc (1), between the outer ring (2) and the inner ring (3), the outer ring (2) and inner ring (3) being connected to one another in the at least one contact region (5) with at least one connecting means (16), in particular a rivet. The inner ring (3) also has, next to the at least one contact region (5), a projection (7) which engages in an indentation (8) in the outer ring (2) in such a way that a bearing surface (9) between the inner ring (3) and the outer ring (2) can be formed, at least when the brake disc (1) is in operation in a vehicle, particularly a motorcycle.

An off-road motorcycle apparatus. There is provided is an off-road competition motorcycle comprising an internal combustion engine (2), having at least one cylinder, and a front wheel (3) as well as a rear wheel (4), a tubular trellis frame (5) and a self-supporting fuel tank configured as a rear tank (11) mounted at the rear end of the off-road competition motorcycle, releasably secured to the tubular trellis frame (5), wherein the rear tank (11) is the sole fuel tank of the off-road competition motorcycle and a lower portion of the rear tank (11) extends by its bottom (16) in the yaw axis direction of the off-road competition motorcycle (1) into the region of one end of the tubular trellis frame (5).

An insert specifically adapted for use with an off-road tire, such as an off-road tire of a motocross motorcycle, or an off-road bicycle. The insert includes an inflatable tube and a foam element which generally conforms to the contours of the off-road tire to provide support to the tire when the tube is inflated. The ability to deflate the insert facilitates installation of the insert between the wheel rim and off-road tire. When inflated, the insert occupies the space between the wheel rim and tire to support a load during use of the wheel.

A double lip seal for a dust excluder seal for a cylindrical reciprocating tube connected to a recreational or utility vehicle, wheel and an off-road motorcycle or bicycle. The seal includes an oil side beam generally parallel to the axis of the reciprocating members and having a spring loaded dust excluder lip for engaging the inner cylindrical tube and wherein the spring is protected from dust and dirt by an outer excluder lip that prevents the garter sprung lip from fouling. In addition the lip is designed with a negative R-value which allows the sprung lip to rotate and position the geometry of the lip to act as a dust excluder lip. The protected spring can now compensate for lip wear which enhances the service life of the seal. The seal also includes an air side beam having a second sealing lip engaging the inner cylindrical tube.

The present invention is directed to a Disaster Evacuation Cart that can be handled by one or two people or may be towed by a bicycle, off road motorcycle or an all-terrain vehicle into and out of areas of difficult passage, may be converted into a stretcher carrier and may be stored in an upright position. Handles on the lower surface support the device in the upright position and can be used when transporting in difficult areas. The device is equipped with hand brakes for absolute control. The sides and back will have a load bearing fabric material covering that accommodates MOLLE gear and accessories which may include, but are not limited to storage bags, pouches, and utility items like knives, machetes, hatchets and shovels along with a variety of defensive items like mace and fire arms. Additional accessories will include extension handle bars, a vehicle tow bar and fabric stretcher material. The Disaster Evacuation Cart will have a large central storage cavity with a smaller storage cavity below for heavy objects like water or ammunition.

A control lever mount assembly suitable for use in connection with an off-road motorcycle. The lever mount assembly includes a lever-supporting portion, or perch, which is configured to rotatably support a control lever. A sleeve is secured to the handlebar and supports the perch for rotation about an axis of the handlebar. A detent assembly secures the perch in a desired angular orientation relative to the sleeve and the handlebar. The detent assembly is configured to permit rotation of the perch in response to a force being imparted to the lever and / or perch during a crash or fall to protect the perch and lever from damage. Preferably, one or more clamp members are configured to apply a clamping force to the sleeve over a relatively large surface area to prevent damage to the handlebar. A slot may be provided in the sleeve to permit the sleeve to be compressed around the handlebar for a secure fit.

A tire (2) according to the present invention includes a tread (4), a pair of beads (8), and a carcass (10) having a radial structure. The carcass (10) has a first ply (32) and a second ply (34). The first ply (32) has a first cord. The first cord is formed by twisting three yarns. The yarn is constituted by an aramid fiber. A fineness of the yarn is equal to or higher than 800 dtex and is equal to or lower than 1100 dtex. The second ply (34) has a second cord. The second cord is formed by twisting three yarns. The yarn is constituted by the aramid fiber. A fineness of the yarn is equal to or higher than 800 dtex and is equal to or lower than 1100 dtex.

To place a muffler in a front area to make it suitable for an off-road motorcycle, A down frame extending downward obliquely from a head pipe ahead of an engine and a lower frame connected with its lower end, extending backward under the engine, are provided. A muffler is located in the vicinity of the joint between the down frame and the lower frame where its rear surface is curved forward in a convex pattern along the down frame and the lower frame. An exhaust pipe extending from a cylinder head is almost S-shaped as seen sideways and its forward curved portion and lower backward curved portion are vertically arranged with its lower end connected with a lower portion of the muffler.

The invention relates to a device for separating, and maintaining a distance between, a person's face and a protective eye mask worn on a helmet. The device is formed by two symmetrical elements disposed on each side of the helmet. Each element is formed by a flap (1) hinged to a support (2) by means of a rotation shaft (2). When the flap is positioned to the rear, the strap can be positioned normally. When the user pushes the flap forwards, the flap rotates through approximately 180 ° and becomes the new support point for the mask instead of the face. The mask is then held in place by the tension of the strap and a lever (4) that presses against the mask. A roller (5), mounted on a shaft solidly connected to the flap, facilitates the movement of the flap under the strap. The device provides increased ventilation for the helmet wearer and allows the helmet to be taken off without the protective mask being removed.

A control lever mount assembly suitable for use in connection with an off-road motorcycle. The lever mount assembly includes a lever-supporting portion, or perch, which is configured to rotatably support a control lever. A sleeve is secured to the handlebar and supports the perch for rotation about an axis of the handlebar. A detent assembly secures the perch in a desired angular orientation relative to the sleeve and the handlebar. The detent assembly is configured to permit rotation of the perch in response to a force being imparted to the lever and / or perch during a crash or fall to protect the perch and lever from damage. In some arrangements, the sleeve may be comprised of two separate pieces.

The invention discloses a welding fixture for a rear fork of a cross country motorcycle frame, and belongs to the technical field of welding application in machining. The welding fixture comprises a tooling bottom plate and supports arranged on the tooling bottom plate. Each support comprises a front support, a shock absorbing seat pipe support and a rear support. The supports are corresponding to all parts of the rear fork of the cross country motorcycle frame. Through adoption of the technical scheme, the rear fork of the motorcycle frame is accurately positioned during the welding process, the precision of the size of the welded rear fork of the motorcycle frame is ensured, and the welding efficiency is improved.

An off-road motorcycle incorporates a swingarm assembly for pivotally supporting a rear wheel relative to a frame of the motorcycle. Preferably, the swingarm includes right and left arms extending rearwardly from a forward connecting portion. Right and left rear wheel mount members are secured to the right and left arms, respectively, to rotatably support the rear wheel of the motorcycle. Preferably, the arms of the swingarm assembly are formed at least partially by a hydroforming process and the center of each of the arms has a width that is greater than the width of either a forward or rearward end of the arm. In addition, the forward end of each of the right end left arms preferably is bent inward such that the forward portion of the swingarm assembly is narrower than the rear portion of the swingarm assembly. The hydroforming process permits the inner wall of the arms to be vertical and substantially planar along the region where the arms are bent about a generally vertically extending axis. In addition, a vibration absorbing coating can be applied to the wheel support members in a manner to be interposed between an inner surface of the wheel support members and the outermost portion of a hub of the rear wheel.

A visor that is especially useful for motorcycle riders and especially for off-road motorcycle racing. The visor has a sun shade member and a mirror. The mirror is affixed to an under surface of the sun shade member. The mirror has a continuous convex surface with a curvature that is free of discontinuations and step changes. The mirror is spaced an effective distance from the user's eyes and has a lateral span and a longitudinal span that are large enough so that the helmet wearer can simultaneously see approximately the same field of view to a side and rear with each eye by a slight turn and tilt of the user's head while an unobstructed line of sight in the direction of travel is retained. The invention also includes a mirror that can be retrofitted to various sun shade members and a kit for retrofitting the mirror in existing sun shade members.

The invention discloses a crank-connecting rod mechanism for an engine of a miniature cross-country motorcycle. The crank-connecting rod mechanism comprises a left crank, a right crank, a crank pin and a connecting rod, wherein the big head end of the connecting rod is positioned between the left crank and the right crank; the big head end of the connecting rod, the left crank and the right crank are connected with each other through the crank pin; the axial lines of the left crank and the right crank are in the same line and are parallel to the axial line of the crank pin; the distance between the axial lines of the left crank and the right crank and the axial line of the crank pin is 28.5 to 30.5 mm; the diameter of the shaft part of the right crank is 95 to 97 mm; the axial length of the right crank is 64 to 66 mm; and the distance between the centre of an installing hole at the big head end of the connecting rod and the centre of the installing hole at the small head end of the connecting rod is 94.3 to 96.3 mm. By changing a plurality of key parameters of the crank-connecting rod mechanism, the crank-connecting rod mechanism for the engine of the miniature cross-country motorcycle meets the functional requirements on high raising speed, strong explosive power, high torque, high crank rotating speed of the engine of the miniature cross-country motorcycle, and has the characteristics of ingenious conception, simple structure, easy implementation and the like.

A dirtbike maintenance apparatus (DMA) (10) having a dirtbike ramp (12); a dirtbike support assembly (42) with a lower horizontal member (44), a right vertical telescoping member (54), a left vertical telescoping member (78), an frame engagement plate (98); and an assembly attachment member (128); a front tire engagement assembly (134) with a hingedly attached tire plate (138); a right telescoping member (164) and a left telescoping member (194). The DMA (10) is placed on a level surface and a dirtbike (240) is directed onto and along the ramp (12). Once the dirtbike's front tire (242) contacts the tire plate (138), the engagement assembly (134) pivots forward, thereby pulling forward the right and left telescoping members (164,194). At the opposite end the telescoping members (164,194) are attached to the dirtbike support assembly (42). The support assembly (42) is pivotally attached so that as it is pulled forward, the frame engagement plate (98) is forced upwards and interfaces with the lower section of the dirtbike's frame (248), thereby elevating the middle and rear sections of the dirtbike (240).

Large impacts act on a spoke wheel and spokes fastened by nipples tend to be loosened when a racing off-road motorcycle and the like repeatedly jumps and lands. A hub is connected with a rim by using deformed spokes each having a deformed portion. The deformed spoke is fastened while being elastically deformed so that the deformed portion extends by the nipple. As compared to a straight spoke, the deformed spoke has low longitudinal elastic modulus and substantially the same stiffness with a spoke having an equal diameter.