30 results about "Fixed ramp" patented technology

A modulation system can switch between two modulation modes. In order to comply with limits on peak power in spectral bands outside the RF operating one the transmitter is required to ramp down to a condition of minimal power. To avoid fixed ramping and trailing bits, the transmitting signal is subjected to FIR filtering. The two FIR filters are primed with a sequence using a parallel input mode before serially entering the information data.

The invention discloses a cushioning and damping device for logistics transportation, comprising a bottom plate, wherein four corners of the bottom of the bottom plate are each fixedly connected witha roller frame; the inner cavity of the roller frame is movably connected with a roller through a rotating shaft; the top of the bottom plate is fixedly connected with a shell; and the top of the inner cavity of the shell is movably connected with a movable plate. By means of cooperation among the shell, the movable plate, the movable pipe, the first spring, the movable inclined block, the fixed ramp, the fixing block, the support block, the second spring, the sliding sleeve, the third spring, the first fixture, the movable lever and the second fixing bracket, the cushioning and damping devicefor logistics transportation solves the problem that the cushioning and damping effect of the existing logistics cart is poor, thus causing the phenomenon that the articles will drop when the transportation meets the bump so as to cause the damage of the articles. The cushioning and damping device for logistics transportation has the advantages of good damping effect, is favorable for the transportation of the articles, and greatly reduces the losses of enterprises and customers.

The invention provides a multifunctional automatic compensation gangway, being characterized in that a telescopic gangway is telescopically sleeve in the fixed ramp, and is driven by a telescopic mechanism arranged on the fixed gangway, In addition, the freight car is movably provided on the telescopic gangway and the fixed gangway, and the freight car is moved along the freight car track by a freight car traction mechanism provided on the fixed gangway, and furthermore, the telescopic gangway and the fixed gangway are integrally pitched by a pitching mechanism provided on the rear end of thefixed gangway. Using the multifunctional automatic compensation gangway, not only can the operation range be enlarged, but also can be suitable for the operation environment with height difference, and at the same time, the large cargo and the transportation personnel can be taken into account.

The invention provides a two-section unpowered lifting ramp of a cold storage side-hung door. The two-section unpowered lifting ramp comprises a fixed ramp body and a lifting ramp body. The lifting ramp body is arranged close to the cold storage side-hung door, and the fixed ramp body is located in front of the lifting ramp body. The lifting ramp body comprises a bottom frame, a lifting panel located on the bottom frame, a slide rail groove formed in the bottom frame, a slide rail located in the slide rail groove, wheels located on the lower portion of the lifting panel, a transmission grooved plate and a shifting pin assembly, wherein the transmission grooved plate and the shifting pin assembly are mounted on the upper portion of one side of the slide rail. The bottom frame and the lifting panel are connected through hinges. The slide rail is provided with grooves, a slope is located on one side of each groove, and the grooves correspond to the wheels on the lower portion of the lifting panel in position. The shifting pin assembly is mounted on the lower portion of the cold storage side-hung door. When the cold storage side-hung door is opened, the lifting ramp body slowly rises to the position aligned with the ground in a cold storage along with opening of the cold storage side-hung door, and a carrying vehicle can enter and get out of the cold storage through the ramp for carrying goods. When the door is closed, the lifting ramp body automatically descends, operation is simple, and the situation that the ramp or the cold storage side-hung door is damaged due to the fact that the door is closed when people forget to lower the lifting ramp body is avoided.

The invention provides a liftable and rotatable vehicle carrying plate for a parking device. The liftable and rotatable vehicle carrying plate aims at solving the problems that according to an existing parking device, after a vehicle carrying plate lifted in a hung mode through a rope falls to the ground, the vehicle carrying plate can not be directly rotated, and when a rotatable vehicle carrying plate is arranged on a rigid bracket, the height head needs to be solved. The liftable and rotatable vehicle carrying plate for the parking device is characterized in that concave high-strength thin plates (23) are arranged at the two ends of a bottom beam (21) of a rigid bracket (2) to form a channel for enabling the sinking edges of fixing ramps (12) at the two ends of the vehicle carrying plate (1) to freely rotate, and therefore after the vehicle carrying plate falls to the ground, a vehicle can be directly and stably driven on and driven off the vehicle carrying plate (1) without an elastic hinged ramp plate.

The invention discloses an improved letter box device, which comprises a base body installed on the upper side of the trolley through an oil pressure shrinking cylinder, and an oblique push rod is fixedly installed on the upper side of the right end surface of the trolley, and the top of the oblique push rod is fixed A hand-held bar with front and rear extensions is installed, and the front and rear ends of the hand-held bar are covered with hand-guard rubber sleeves. The inside of the base body is provided with a first hole, and the base on the left side of the first hole A second hole is provided in the inner wall, and a connecting hole is provided between the second hole and the first hole and passes through the inner wall of the base body and communicates with each other. The left side of the second hole is The inner top wall of the section is provided with a first sliding groove extended upwards, and a first sliding block is connected in translation in the first sliding groove, and a slope is fixed at the bottom end of the first sliding block. Department; the present invention is simple in structure, easy to operate, improves the painting efficiency, and saves time and effort.

1. A securing platform comprising:

• • a reinforced rectangular frame and cover plate; the longest length runs parallel and rests upon the top of an open tailgate of a pickup,
  • an eyebolt located 6 inches in from both ends of front face of platform; with attached securing chains to be anchored to tiedowns at rear of truck bed,
  • a metal plate and a rubber pad are bolted 1⅝ inches in from both ends to the rear face of platform to hang 90 degrees below the horizontal plane of tailgate to function as stop from forward motion; a securing chain attached to the opposite end of each metal plate is anchored to the bumper of a pickup truck,
  • steel tubing is welded to the rear face of the platform to form outside portions of a hinge and configured to attach ramps at three locations;

2. Loading ramps comprising:

1¼ inch steel square channel on the end; 1½ inch angle steel for six and eight foot sides, with 1 foot cross members spaced 10 inches apart,

wherein a steel tube is centered and welded to the end of a ramp to form the center portion of a hinge connection,

wherein loading ramps are attached to the platform by inserting a solid 1/4 inch steel rod through the three portions of steel tubing; therefore securing the ramp and allowing the ramp to pivot at various degrees from the plain of the tailgate.

The invention relates to a shaft workpiece boring and milling clamping auxiliary adjusting device, and belongs to the technical field of machining auxiliary equipment. According to the technical scheme, the cross sections of a movable ramp iron (2) and a fixed ramp iron (4) are of right triangle shapes, the cross section of an adjusting ramp iron (6) is of isosceles trapezoid shape matched with the movable ramp iron (2) and the fixed ramp iron (4), and the adjusting ramp iron (6) is arranged between the movable ramp iron (2) and the fixed ramp iron (4); and the movable ramp iron (2), the adjusting ramp iron (6) and the fixed ramp iron (4) are stacked up and dowm together to form a cuboid, the periphery of the cuboid is provided with a baffle, a V-shaped cushion iron (1) is fixed on the movable ramp iron (2), an adjusting bolt (3) is in threaded connection with the adjusting ramp iron (6), and the baffle (5) is provided with sliding grooves matched with the adjusting bolt (3) and the movable ramp iron (2). The shaft workpiece boring and milling clamping auxiliary adjusting device has the beneficial effects that the stability of workpiece clamping can be ensured, the adjustment is convenient, the adjustment precision is high, and the boring and milling machining requirements can be met.