58results about How to "Reduce ground pressure" patented technology

The invention discloses a construction process of four-fold tube stratum decompression type double liquid jet grouting in the construction project technology field, which comprises the following steps that firstly forming a drilling lance boom with four-fold coaxial steel tubes, arranging passages in the inner portion of a multifunctional injector, which is relative to the four-fold tube of the drilling lance boom, installing two nozzles on the upper portion and the lower portion of the lateral side of the injector, secondly positioning, thirdly drilling holes, fourthly conducting jet grouting and injecting plaster, coaxially spraying compressed air and high-pressure cement plaster by the nozzles on the upper portion of the injector, and coaxially spraying high-pressure cement plaster and low-pressure accelerator serum by nozzles on the lower portion of the injector, wherein the low-pressure serum is externally coated on the high-pressure cement plaster, which are mixed with earth at the moment of being sprayed out in order to fast solidify soft ground, and fifthly conducting jet grouting to the design height, closing the valve for transporting fluid, and shifting a driller. The construction process solves the problems that the jet grouting solidification is hard to be conducted under the station of underground water flowing and jet grouting pile with large diameter and horizontal jet grouting solidification are hard to form. The invention reduces pressure for stratum through absorbing out waster mud water in the drilling and jet grouting process, and reduces the affect to the periphery.

A system for adjusting the compliance of a wheel is provided. In one embodiment, wheel segments are adjusted, causing the stiffness of the wheel to change. Such adjustments can be made while the wheel is rotating, allowing the wheel compliance to be changed while a vehicle is in motion.

A lift arm (9) includes a first arm (11) and a second arm (12). A pivot joint portion (32) where the first arm (11) is pivoted on a bracket (8) stood at a vehicle side portion substantially corresponds to the rear end of an operation control portion. A rod (15) as a swing motion-limiting member is interposed between the bracket (8) and the second arm (12). An angle of bend formed by the first arm (11) and the second arm (12) is set to be large at a lowered position of the lift arm and small at a lifted position.

A system for adjusting the compliance of a wheel is provided. In one embodiment, wheel segments are adjusted, causing the stiffness of the wheel to change. Such adjustments can be made while the wheel is rotating, allowing the wheel compliance to be changed while a vehicle is in motion.

The invention discloses a C30 slope-protection brick mixture ratio based on sandy spoil in navigation projects and a preparation method of the slope-protection brick. The C30 slope-protection brick comprises the following raw materials in parts by mass: 9-18 parts of cement, 55-70 parts of sandy spoil, 7-13 parts of mineral powder, 0.8-3.5 parts of plaster, 0.4-2 parts of an enhancer and 9-12 parts of water. The preparation method comprises the following steps: after the raw materials are fully and evenly mixed according to the ratio, injecting the mixture into a prefabricated mold, molding under the working pressure of 20MPa, enabling a molded test specimen to be demolded immediately, and placing the demolded test specimen indoors for natural watering maintenance to obtain the sandy-spoil-based slope-protection brick. The cube test specimen strength of the sandy-spoil-based slope-protection brick can reach C30, and the cube test specimen can replace a concrete material to be used for preparing the slope-protection brick and other hydraulic engineering materials. The sandy spoil is reasonably utilized, so that the transferring and ground pressing of spoil and the adverse effects on the environment in channel improvement are reduced, and the field of resource utilization of sandy spoil curing products is expanded.

The invention is a harvester particularly suited for harvesting baby greens. The harvester generally comprises a chassis with wheels that travel in the furrows between raised beds, a sorting belt assembly, and an articulated connection to a cutting assembly on a floating header. The floating header rides on the top surface of a raised bed and is articulated so that the floating header can move independently of the chassis to follow the contours of the top of the raised bed so that the cutting assembly can cut at a uniform height. The sorting belt assembly includes a series of belts for collecting and sorting the cut baby greens at the easiest and most effective time to do so, immediately after the baby greens are cut and before the baby greens are clumped in storage bins or in other storage container. The invention further includes a method of using the harvester of the invention in which the forward momentum of harvester and the density of the crop are used to assist the cut product onto the collection belt.

A pair of rake wheels in an assembly is referred to as a center splitter assembly. Each rake wheel is configured for free-rotation, meaning it is powered by contacting the ground. The center splitter is used to separate material, each wheel moving material in a different direction. The rake wheel on the left side of the center splitter assembly will rotate in a clockwise direction, as viewed from behind the wheel, which will cause the material to move from the right to the left. The opposite applies to the rake wheel on the right side of the center splitter assembly, where it will rotate counter-clockwise, moving material from the left to the right. Since these rake wheels are attempting to move material in opposite directions, the spacing between the wheels has been found to be critical.

A “Torsional Suspensioned, Steerable, Oscillating and Propelling Axle Assembly” utilized in the individual track units of a multi track unit all-terrain vehicle or machine with axle assemblies providing / enabling suspension, steering, oscillation and propelling functions of the track units of the all-terrain vehicle or machine.

A self-propelled harvesting machine includes a front harvesting attachment, a ground drive with first and second drive shafts offset relative to the front harvesting attachment, first and second track roller units to which first and second drive shafts are drivably connected and which extend on both sides of the harvesting machine and a rear axle having rear wheels that are steered via a steering mechanism provided in a rear region of the harvesting machine. The first and second drive shafts are driven by separate first and second hydraulic motors of a hydrostatic transmission. A displacement volume of each of the first and second hydraulic motors is changed depending on a steering movement transferred from the steering mechanism to the rear wheels, realizing an additional moment about a vertical axis of the harvesting machine simultaneously with the steering of the rear wheels.

The invention relates to a cropper chassis of a type similar to the type of an automobile, and is an agricultural machine. A majority of current cropper chassis have machines weighing on a driving wheel and an oversized pressure to the ground, thus being beneficial to the protection of the surface of the arable land; when a shift-region operation is carried out, as a directive wheel is not provided with a braking, the shift-region speed is limited, thus reducing the safety property of the braking. The invention provides a cropper chassis a type similar to the type of an automobile, and includes a machine frame, a driving axle, a directive axle, an engine, a gear-box, a transmission shaft, a reverse gear-box, a force obtaining device, a four-wheel braking system, and a damping flat spring. The whole chassis is a rear steering type, therefore the total weight is distributed equally to four tyres, and the pressure to the ground is greatly lowered; meanwhile, the adoption of the braking of the four wheels and the damping flat spring arranged on the directive axle assure safe and fast trans-regional work of the cropper.

The invention discloses a pit digging machine. The pit digging machine comprises a vehicle frame, a walking mechanism, wherein the walking mechanism is arranged at the lower part of the frame, and thewalking mechanism comprises a track component and a driving device for driving the track component to move; the pit digging mechanism is arranged at the head part of the frame, the pit digging mechanism comprises a lifting component, and one side of the lifting component is connected with the head of the frame; the speed reducing component is fixedly connected to the other side of the lifting component; the output end of the motor is connected with the input end of the speed reducing component; and the digging head is connected to the output end of the lower part of the speed reducing component. According to the pit digging machine, the track component is arranged as a part of the walking mechanism and can move on the uneven ground, so that the ground pressure in unit area can be reduced,the requirement for the road surface is low, and the phenomenon of tire burst does not easily occur.