11results about How to "Improve climbing ability" patented technology

The present application relates to the technical field of highway-railway dual-purpose transport equipment, in particular to a highway-railway dual-purpose steel rail double-frequency electric normalizing train, which comprises a vehicle body, a tool container and a mobile steel rail pressure-keeping double-frequency electric normalizing device are carried on the vehicle body; the vehicle body comprises a truck chassis assembly, a load-bearing frame and a hydraulic pump station are connected to the truck chassis assembly, and a set of telescopic hydraulic leg mechanisms are arranged at the front and rear ends of the truck chassis assembly respectively, and a wheel-rail running lifting mechanism is connected to the load-bearing frame; the present device is suitable for post-welding pressure-keeping double-frequency electric normalizing heat treatment operation of steel rail joints in seamless lines and urban rail transit. Furthermore, the device and the tool box are integrated and installed on a highway-railway dual-purpose vehicle, so that the working efficiency is improved, the on-and-off track operation and construction requirements of the device are facilitated, and the hoisting and carrying cost of the device can be greatly saved.

This invention discloses a high lift-to-drag ratio, long-endurance, low-speed airfoil, revealing its maximum relative camber, maximum relative thickness, and the curve equations satisfied by its upper and lower edges. The origin of the coordinate system containing the airfoil is defined as the leading edge of the chord. The X-axis coincides with the chord line, pointing from the leading edge to the trailing edge of the airfoil. The Y-axis is perpendicular to the X-axis, pointing in the direction of the airfoil's curvature. The chord length is defined as C; therefore, the maximum relative camber is 6%C, and the maximum relative thickness is 4.5%C. The airfoil of this invention exhibits a higher lift-to-drag ratio and a higher lift coefficient while maintaining a lower drag coefficient. It reduces the weight of the wing structure, and its thin, curved shape results in a smaller internal wing cavity, optimizing aircraft weight while concentrating stress on the structure.

The application provides a rear axle steering continuous pipe operation roller semi-trailer. The semi-trailer comprises a frame, a roller arranged on the frame, a rear axle assembly and a rear axle steering mechanism. The rear axle steering mechanism comprises an upper support seat, a rotary disc bearing, a lower support seat and a steering driving assembly. The steering driving assembly and the upper support seat are arranged on the frame, the rotary disc bearing is connected with the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected with the rear axle assembly. The steering driving assembly is connected with the lower support seat to drive the lower support seat to rotate relative to the upper support seat and drive the rear axle assembly to rotate. The rear axle assembly is steered by adopting the steering driving mechanism to drive the lower support seat. The relative rotation angle between the frame and the wheel is large, the turning radius of the semi-trailer is reduced, the reliability of the steering driving is improved, the safety of the whole vehicle is improved, and the driving strength of the vehicle is reduced.

The invention belongs to the technical field of oilfield chemistry, and relates to a gas reservoir crack mixed temporary plugging agent and a preparation method thereof. The temporary plugging agent is prepared from the following components in parts by mass: a water-soluble high-molecular polymer, heat-resistant starch, degradable fibers, a strength improver and water, the strength improver is montmorillonite powder wrapped by polyvinyl alcohol. The water-soluble high-molecular polymer is matched with the degradable fibers and the starch particles to be interwoven and connected to form a net-shaped structure, so that the pressure resistance is improved, and the temporary plugging effect is improved; according to the strength improving agent, montmorillonite powder wrapped by polyvinyl alcohol is added, in the process that the temporary plugging agent still flows downwards, the polyvinyl alcohol on the surface of the montmorillonite powder is melted along with decline and temperature rise, so that the montmorillonite powder leaks out and absorbs water again to swell, and the strength of the temporary plugging agent is improved. And montmorillonite powder wrapped by heat-resistant starch-degradable fiber-polyvinyl alcohol is cross-linked to form a rich three-dimensional system structure as a climbing skeleton, so that the temporary plugging agent can temporarily plug cracks at positions needing temporary plugging.

This invention relates to the field of lawnmower technology, specifically a self-propelled lawnmower. It includes a tracked motor and a mowing section. The front end of the tracked motor is equipped with an assembly platform for accommodating the mowing section. The tracked motor's interior includes a drive section, a first drive arm, and a second drive arm. The drive section extends the first and second drive arms outwards. The mowing section is connected to the first drive arm. The outer end of the second drive arm is connected to a limiting component, located at the rear of the tracked motor. This design allows the mowing section and the limiting component to extend and be limited simultaneously. During the lawnmower's uphill climb, the limiting component assists and limits the rear of the mower, while simultaneously balancing the drive section and the mowing section, improving the mower's uphill performance and preventing accidents and damage during the climb.

The utility model discloses a kind of power transmission and steering connecting structure of tractor transport unit, including traction outer frame, traction inner frame, fork type drawbar, double ball cage constant velocity universal joint, transmission shaft, drawbar sleeve, double cross universal joint, transmission assembly and transmission shaft universal joint, fork type drawbar includes fork type end and drawbar, the traction outer frame is hinged with traction inner frame, and is connected with tractor head's transmission case, the traction inner frame is hinged with the fork type end of fork type drawbar, double ball cage constant velocity universal joint is installed in the cavity formed by traction inner frame and fork type end, between the transmission shaft and transmission assembly is connected by double cross universal joint. The utility model passes through using double ball cage constant velocity universal joint, can make tractor group more safe when turning angle is larger;By increasing shift mechanism, tractor group can have greater driving force.

This utility model provides a vibratory roller wheel with protruding plates, belonging to the field of vibratory rollers. It includes at least two arc-shaped wheel plates connected end-to-end. At least two layers of fixed tooth blocks are axially spaced on the outer surface of each arc-shaped wheel plate, with any two adjacent layers of fixed tooth blocks staggered. The edges on the arc-shaped wheel plates used for connecting with adjacent arc-shaped wheel plates are curved edges. At least one layer of fixed tooth blocks in any two adjacent layers has connecting tooth blocks at both ends at the curved edges. The connecting tooth blocks are detachably connected to corresponding connecting tooth blocks on adjacent arc-shaped wheel plates via fasteners. The advantages of this utility model are that, through its unique tooth block arrangement structure, it ensures no dead angles during compaction and adapts to various compaction conditions; furthermore, it ensures a stable connection between adjacent arc-shaped wheel plates, preventing loosening and uneven gaps, thereby guaranteeing overall compaction quality.

The utility model relates to all terrain vehicle field, specifically disclose a two gear transmission of all terrain vehicle, include: input shaft, be used for connecting the drive motor of all terrain vehicle to receive power, two gear transmission subassembly, including high speed gear set and low speed gear set, be used for realizing different speed ratio power transmission respectively, synchronizer, switchable with high speed gear set or low speed gear set cooperation, to select high speed gear or low speed gear power transmission path. In the utility model, through setting two gear transmission subassembly including high speed gear set and low speed gear set, can switch speed ratio according to the driving scene: high speed gear state, power transmission through first high speed gear, second high speed gear, realizes whole car high vehicle speed travel with adaptable speed ratio, low speed gear state, power transmission through first low speed gear, second low speed gear, through greater speed ratio output sufficient torque, improve the climbing performance and acceleration performance.

The application relates to the field of vehicle silencers, in particular to a silencer assembly for a vehicle and the vehicle, which comprises a purification device, a first silencer and a second silencer, the air inlet end of the purification device is adapted to be connected with the air outlet end of an engine, the first silencer is arranged downstream of the purification device, and the second silencer is arranged downstream of the first silencer; wherein the first silencer is internally provided with a silencing piece, a plurality of silencing elastic sheets are arranged on the silencing piece and are spaced from each other, the second silencer is internally provided with a silencing cavity, a silencing pipe which is in communication with the first silencer is arranged in the silencing cavity, the silencing pipe is formed with a silencing hole which is in communication with the silencing cavity, through the plurality of silencing elastic sheets which are spaced from each other in the first silencer, the silencing elastic sheets are subjected to forced vibration under the impact of airflow, the vibration generates anti-phase sound waves to realize noise cancellation and energy dissipation of the noise, the influence of exhaust back pressure in the silencer assembly is reduced, and the contradiction between noise control and back pressure rise is balanced.

The utility model discloses a based on the double circle track of flexible initiative barrier formula carrier trolley of variable diameter, including chassis component, walking wheel subassembly, walking wheel power system subassembly and flexible clamping system subassembly, and walking wheel subassembly includes four walking wheels of matrix arrangement, walking wheel power system subassembly is connected with four walking wheels, is used for driving four walking wheels and walks on double circle track, flexible clamping system subassembly includes four guide wheels and guide drive system of four guide wheels are connected with opposite settings, and guide wheel can roll along the inner wall of double circle track both sides, and guide drive system can adjust guide wheel automatic keep with the inner wall of double circle track constant pressure contact according to the size between the inner wall of double circle track. Based on the double circle track of flexible initiative barrier formula carrier trolley of variable diameter, has solved the technical problem of traditional rigid structure easy to jam, derailment on the double circle track, and has high stability, strong environmental adaptability simultaneously.