46results about How to "Small slip rate" patented technology

The invention relates to a self-regulating electronic differential mechanism which is an electronic control system of an electric car and is mainly applied to a dual-motor independent driving mode electric car. Two driving wheels are respectively driven by two motors directly. The driving motors are respectively controlled by two controllers with the same specification. The dual-motor independent and direct driving mode is realized and the self-regulating function of the electric differential is realized. The two controllers are controlled by an accelerator so that the two motors work under the same power and voltage. Due to the characteristics of the motors, the electric differential self-regulating function is realized through the regulation of different slipping rates and the flow limiting function of the controllers. As the driving torque of an internal driving wheel is larger than the external driving torque, therefore, different slipping rates appear and understeer is represented.

The invention relates to a tractor intelligent control method and an intelligent control system. A corresponding signal is collected by a sensor to obtain an existing operating state of a tractor, all parameters are calculated, analyzed and judged by a controller on the basis, and after information is processed, control signals are transmitted to a stepping motor and a high-speed electromagnetic valve so as to enable a main clutch, a PTO clutch, and a brake pedal executing mechanism, an engine throttle draw bar executing mechanism, a hydraulic hanging mechanism and the like to conduct motion to prevent a driving wheel of the tractor from excessive trackslip and overload of a transmission system, ensure good comfort, fuel economy and traction, and prolong service life of the transmission system and tires of the tractor.

The invention discloses a multi-point contact cylindrical gear meshing pair based on conjugate curves, which includes a convex gear and a concave gear meshed with each other in multi-point contact, the meshing surface of the convex gear and the concave gear is a tubular curved surface, The contact curve formed by the meshing points on the tooth profile surface of the convex gear and the contact curve formed by the meshing points on the concave gear are conjugate curves. The multi-point contact cylindrical gear meshing pair based on the conjugate curve of the present invention, the meshing pair The meshing method is that the tooth surface of the convex gear and the tooth surface of the concave gear are in multi-point contact at the same time, and the contact track of the contact point on each tooth surface is a smooth spatial curve. The transmission inherits the meshing characteristics of the conjugate curve, and the tooth profile of the point contact has high contact strength, large load capacity, high transmission efficiency, low lubricating oil temperature rise, greatly reduced slip rate, and small wear.

A cycloid planetary transmission gear based on line-surface conjugation relates to a cycloid planetary transmission gear which comprises a cycloid pin wheel planetary transmission meshed pair. A smooth curve G(2) is selected on a gear surface of a gear in the meshed pair, the main normal vector direction of the curve G(2) is consistent with the normal direction of the gear surface, and the curve G(2) and the gear surface of another gear in the meshed pair form line-surface conjugation mesh. The gear surface of the gear is a tubular meshed surface which is a sphere family enveloping surface S(3) of which the sphere center moves along an equidistant line G(3), the equidistant line G(3) is a smooth curve which has a distance r from the curve G(2) along the main normal vector direction thereof, the spherical radius of spheres in the sphere family is the distance r between the equidistant line G(3) and the smooth curve G(2), and the r is smaller than the minimum curvature radius of the meshed section of the original gear surface. According to the present invention, through changing the cycloid pin wheel planetary transmission into the line-surface conjugation meshed pair, the meshed process is in the mode of point contact; therefore, the transmission ratio is great, the rigidity is good, the structure is compact, and the transmission accuracy is high. In this way, the mesh approximates pure rolling, so that the sliding ratio can be largely reduced, thereby greatly improving the efficiency, prolonging the service life, simplifying the manufacturing process, and achieving high accuracy.

The invention discloses a gear with a novel tooth profile curve. A tooth profile curve at the tooth top of the gear is in a convex shape. A tooth profile curve at the tooth root of the gear is in a concave shape. A meshed tooth pair of a gear pair is in convex-concave arc meshing. In a coordinate system O-xy with the gear center as an original point, through a gear parameter and tooth profile curve parameter equation, the tooth profile curve is obtained, the tooth profile curve is subjected to symmetry and rotation transformation, then the end face profile of the gear is obtained, and the gear pair formed by gears is in conjugation and in convex-concave arc meshing. The gear can be used in tooth profile design in large-load gear transmission, the bearing capacity of the gear is greatly increased compared with an involute, when a rack tool or hobbing is used for machining, machining tool design is simple, and only one tool needs to be machined. The gear is also used in design of a small-tooth-number gear pair with a small tooth number (z is smaller than or equal to 6), and accordingly the bearing capacity is improved.