Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.

Automobile and motorcycle temperature, pressure, angle and flow control sensor

Abstract: The invention relates to the field of sensors and actuators and particularly to an automobile and motorcycle temperature, pressure, angle and flow control sensor. The rear end face of a housing is provided with a connecting port. A stepping motor is disposed on the left inside the housing. A thermistor and a rotating support are disposed on the right inside the housing. The rotating support is disposed on the right side of the thermistor. The upper part of the rotating support is connected with magnet steel. A PCB is disposed on the top of the magnet steel. The upper end of the thermistor is connected with the PCB. The housing is provided with a rear cover on the upper part of the PCB board. The lower part of the center shaft of the stepping motor is connected with a regulating head. The connecting port is provided with a plurality of pins. Each pin is electrically connected with the PCB. The flow control sensor downsizes a temperature pressure sensor, an angle sensor and the stepping motor and integrates the same into a sensor so as to reduce cost and size, thereby being simple in process, reducing processes, decreasing product size, saving cost, achieving integration, and being simple in process.

Basic theory and design method of variable shaft angle line gear mechanism

Abstract: In this paper, a novel line gear mechanism is proposed; it is called the variable shaft angle line gear mechanism (VSALGM). VSALGM has two rotational degrees of freedom, one is the rotation of the two gears with a constant transmission ratio, and the other is the relative swing of the two gears shafts. First, a novel contact model of VSALGM composed of one driven contact curve and one driving line teeth working surface (DLTWS) was proposed. With the concept, the basic design equations for VSALGM were derived on the basis of the space curve meshing theory of line gear. Moreover, the design criterion of pressure angle for VSALGM was analysed and proposed on the basis of the contact model. A basic design method for VSALGM was thus developed. A design example was given, and prototypes were manufactured using three-dimensional (3D) printing. Kinematic experiments and gear contact spot testing were carried out on a self-made kinematic test rig by the prototypes. The results show that the VSALGM designed in this paper can achieve a continuous, smooth and stable meshing transmission while the shaft angle is continuously changed within its setting range.

Angle Change of Plane Curve

Abstract: In classical analysis, a curve’s length can be defined as the supremum of the length of a polygonal line with turning points in the curve. To know the change of angles when one travles from one endpoint to another along the curve, a similar method can be taken. The analog is also treated in comlex analysis, but a more natural way to deal with such a problem exists, that is, define the change of angles to be the limit of polygonal line with turning points in the curve. Angle change between vectors and the sum of angle chage of a polygonal line are both well defined, then the way to find the angle change of a curve is showed here. A conjecture is posed. An abstract angle change function is also constructed. Further work is to solve the conjecture, to find the sufficient and necessary condition for a plane curve to be summable respect to total sum of angle change, and to study angle variation and the angle change function.

Target Optimization Design of Cam Curve in Zoom System

Abstract: Zoom lens has been widely applied in all kinds of fields, and its cam optimization is the key to actualizing the performance of its optical design and the zooming process, while the smoothness and speediness of zooming movement must be considered for military and civilian use. With the incremental use of environmental requirements, it puts forward higher requests to the cam performance of lens. In order to guarantee that the cam has good stiffness in the case of vibration and shock environment, in the process of cam design, it not only requires curve optimal, but also needs to consider influence on the performance which is caused by reduced cam stiffness of the zoom system. A fine curve can ensure that the cam pressure angle α is smaller, and to ensure the cam follower maintains the uniform velocity and smaller acceleration in zooming process, and make the zoom system produce little impact, and whole zooming process smooth and fluent, it can reduce the zoom systems driving moment M, and can ensure the stability imaging of the zoom system. Good cam stiffness K can make the zoom lens have good stability in vibration environment, and make sure that the image quality. M and K respectively up to the pressure angle α of zoom curve and the rotation angle θ of zoom curve in cam. In the new cam design process, considering the whole influence on the performance that is caused by K and M to cam, we construct the function expressions K = f (α, θ) and M = f (α, θ), and then, build target optimization function with K and M, optimize the relationship between pressure angle α of zoom curve and rotation angle θ, looking for the optimal value for the stiffness K and the cam system driving moment M , and improve overall performance of the zoom cam .

Large contact ratio, inner engagement cycloidal gear structure

Abstract: A large contact ratio, inner engagement cycloidal gear structure, comprising an inner cycloidal gear (1) and an outer cycloidal gear (2) disposed inside the inner cycloidal gear (1) and configured to engage with the inner cycloidal gear (1), wherein a line of action between the inner cycloidal gear (1) and the outer cycloidal gear (2) forms an arc. Assuming the radius of the arc of the line of action to be r, the pitch circle radius of the inner cycloidal gear (1) to be r1, and the pitch circle radius of the outer cycloidal gear (2) to be r2, then: r1 > r > r2. On performing a pure rolling movement with a line of action on the pitch circle of the inner cycloidal gear (1) and the pitch circle of the outer cycloidal gear (2) respectively, a point on the line of action forms tooth top profiles of the two gears respectively. The gear structure, in transmission, has multiple pairs of teeth engaging simultaneously, with a small pressure angle and high bearing capacity. The root portions of gear teeth are not substantially involved in engagement.