100 results about "Tangential contact" patented technology

Various techniques are provided for reducing the impact of tangential forces on touch location in a touch location device. For example, in one aspect, shunt connections are provided that impede lateral motion of the touch surface structure at the level of the touch plane, thereby reducing to insignificant magnitude reactions to tangential force passing through the sensing connections. In another aspect, sensing connections incorporate elastic means so adjusted as to turn that connection's reaction to tangential touch force perpendicular to its axis of sensitivity. In another aspect, sensing connections incorporate sensing means so adjusted as to turn that connection's axis of sensitivity perpendicular to its reaction to tangential force.

A patient matched instrument for a patient's femur is disclosed. The instrument includes a body having a cutting slot and a patient matched surface that mates with the patient's trochlear groove, a first leg portion extending from the body, a second leg portion extending from the body; and each leg portion has a contacting pad for tangential contact with the patient's femoral medial and lateral condyles.

The invention relates to a device for placing sleeves on traveling articles, said sleeves being cut from a continuous sheath passing over a sheath-opening shaper, first outer wheels serving to advance the sheath along the shaper, and second outer wheels being provided downstream from cutter means for the purpose of ejecting the cut-off sheath segment, said wheels being driven in rotation by associated electric motors controlled synchronously by a virtual-shaft common electronic programmer. In accordance with the invention, the programmer is arranged to determine a continuous profile of speed variation for the associated electric motors, said profiles being bell-shaped and having a common end segment in which the profiles coincide, this corresponding to the motors having identical speeds, the length of the common end segment being selected so that the sheath is advanced beyond the point of tangential contact with the second wheels so that said sheath is pinched by said second wheels prior to being held stationary for the cutting and ejection pass.

The invention relates to a comprehensive experiment table for measuring normal and tangential contact rigidity of a mechanical junction surface, wherein upper and lower support plates are connected into a whole by a stand column, a jack is fixed in the lower support plate, a pressure sensor and a lower test piece are arranged on the jack, an upper test piece is arranged right above the lower test piece, a lower tangential rigidity test pad is clung to two side faces of the upper test piece and the lower test piece and is connected by bolts and nuts, a bolt pretightening force measuring sensor is lined under a bolt head, an eddy current sensor is fixed on two beams extending forwards and backwards of the lower test piece and just faces to two beams extending forwards and backwards of the upper test piece, an adjusting screw is screwed into a screw guide sleeve by virtue of thread, the upper test piece is embedded into a test piece fixing sleeve, a circular arc surface is formed above the upper test piece, a surface corresponding to the circular arc surface, of the test piece fixing sleeve, is a plane, and by changing the assembly relationship of test pieces, the normal contact rigidity and the tangential contact rigidity of the test piece are realized in the same device, the equipment utilization rate is improved, the cost is saved, and the testing efficiency is improved.

A collapsible container with latches provides a more consistent knockdown force in more situations. At least one of the engaging surfaces of the latch is curved outwardly toward the other engaging surface. This provides substantially tangential contact between the surfaces, even when the wall is deformed slightly by the knockdown force. The tangential contact provides consistent frictional force resisting the knockdown force.

The invention discloses a rough surface-based three-dimensional contact stiffness calculation method for a spur gear. The method comprises the steps of firstly by adopting hexahedral mesh generation, requiring all square meshes on a tooth surface to be equal in area; calculating contact pressure distribution of the smooth tooth surface based on a finite element method, and extracting node pressure intensity of a contact region; calculating normal contact stiffness and tangential contact stiffness of a single square mesh based on a fractal theory; and calculating the contact stiffness of the tooth surface. According to the method, the precision of a gear contact stiffness calculation model is further improved; the defect of smooth contact according to a Hertz theory in an original calculation process is overcome; an influence law of a roughness parameter on a gear stiffness characteristic in a rough tooth surface contact process and a calculation method are disclosed; and meanwhile, a finite element-based three-dimensional contact stiffness calculation model is more accurate than an original two-dimensional calculation model or calculation formula, and the influence of errors in actual assembling and manufacturing processes of the gear is considered, so that the gear contact stiffness is more accurate and a foundation is laid for gear dynamics analysis.

The invention concerns a device, such as a box, for storing and dispensing in single-units objects in the form of sheets, wafers, thin strips or platelets, with planar geometry in particular square, rectangular, polygonal, circular, elliptical, enabling said objects to be dispensed individually in single units, comprising: a) storage means such as a container with a lid, containing the objects to be dispensed, stored stacked on one another on a storage surface, said storage means including a surface for guiding the objects to be dispensed and a dispensing opening enabling the objects to be dispensed individually in single units; b) dispensing means bade of a flexible, deformable, mobile driving element, having one of its ends in contact with the object to be driven, along at least one transverse tangential contact line, and whereof the longitudinal cross-section is S- or nearly U-shaped.

A strip of wrapping material is advanced by a feed unit that includes a gumming device composed of a gumming roller and a transfer roller contrarotating about horizontal and parallel axes and in tangential contact one with another along an area coinciding with a straight line generator common to both. At least one of the two rollers is maintained at a given temperature by a fluid directed through a circuit of which a first portion extends along a shaft supporting and driving the roller and a second portion is located internally of the roller itself; the circuit includes valves operating respectively along a flow branch and a return branch of the circuit, associated both with the drive shaft and with the respective roller and interposed between the first and second portions so that these can be opened and closed when required, whilst the first portion is connected to an inlet duct and to an outlet duct rigidly associated with a frame and connected to the circuit by way of a hydraulic or pneumatic rotary coupling.

A counterbalance assembly for counterbalancing a tilt-in window sash within a guide track of a window frame. A brake shoe housing is provided having a face section and a rear section defined between a top edge, a bottom edge, and two side edges. At least one of the two side edges is a curved surface having a convex curvature. A curl spring is provided having a free end. The free end of the curl spring engages the brake shoe housing, therein applying a turning torque to the brake shoe housing that cocks the brake shoe housing and moves the curved surface into tangential contact with the guide track. A cam actuator is interposed between the face section and the rear section that spreads these sections into contact with the guide track when the tilt-in window sash is tilted forward.

The invention discloses a device for testing contact rigidity, and comprises a friction force testing component, a positive pressure loading component, freely supported beams, a right support, a left support and a base, wherein the freely supported beams are installed in U-shaped grooves of the right support and the left support; the friction force testing component, the positive pressure loading component, the right support and the left support are arranged on the base. When loaded with an initial positive pressure and a shock excitation load, the device for damping test can test the parameters of the tangential contact rigidity of a contact surface, such as different contact surface shapes, different initial positive pressures, the properties of different experiment sample materials, etc. and analyze the rule of influence of the contact surface shape, the initial positive pressure and the experiment sample material on the contact rigidity.

The invention discloses a three-dimensional random convex polygon block discrete element method based on a distance potential function. A research object is discretized into a block element system; carrying out contact detection on all block elements according to a nonuniform block discrete element contact detection method provided by the method; defining the distance potential function and carrying out normal contact force calculation on mutually contacting block elements, thereby obtaining normal contact force acting on each target block element and a torque caused by the normal contact force; on the basis of a tangential contact force direction vector calculation method provided by the method, carrying out calculation to obtain tangential contact force of each block element and the torque caused by the tangential contact force according to increment of tangential relative displacement; solving acceleration and angular acceleration of each block element through a rigid motion equation; and calculating velocity and displacement of each block element through a velocity verlet algorithm and describing deformation and motion state of a whole medium according to motion and relative position of each block element.

The invention discloses a method for testing the contact rigidity of a rock discontinuity structural plane. The method comprises the following steps: 1, selecting a test area; 2, installing vibration sensors; 3, starting a collecting instrument to make the collecting instrument in a sampling state; 4, hammering one side of the rock discontinuity structural plane, and adjusting the hammering direction to generate longitudinal waves and transverse waves vibrating along the line direction of the vibration sensors; 5, recording through the collecting instrument; 6, calculating the wave velocity of the longitudinal waves, the wave velocity of the transverse waves, the time consumption of the longitudinal waves passing through the structural plane and the time consumption of the transverse waves passing through the structural plane; 7, calculating the elastic modulus and the Poisson's ratio of a complete rock; 8, carrying out inversion analysis by means of a value technology, and establishing a value model similar to the test area; and 9, applying impact load to one side of the value model, and continuously adjusting the normal contact rigidity and the tangential contact rigidity of the structural plane in the value model to obtain the contact rigidity of the structural plane of the test area. The invention also provides an apparatus adopting the method.

The invention discloses a cooling-fin cylindrical battery pack heat dissipation device and method employing a composite phase changing material. A cooling fin comprises a main fin and auxiliary fins,wherein the main fin is of a fully-closed shell structure, a phase changing material is packaged in the main fin, the auxiliary fins are expanded towards two sides from a surface of the main fin, andtail ends of the auxiliary fins are in tangential contact with the surface of a battery. Cylindrical batteries in different specification sizes can be adapted by adjusting the size and the distance ofthe fins and the thickness of the phase changing material, and the heat dissipation and the heat preservation performance requirement is met. A fixed base is arranged at the bottom of a battery pack,the battery pack can be reinforced, the shock resistant capability is improved, a fan can be externally connected to improve convection, and the heat dissipation and heat preservation effect is improved. By the heat dissipation device, the advantage of the phase changing material is fully utilized, the temperature uniformity of the battery pack is improved, light requirement is conformed, thermaldisaster is prevented from propagating in a battery stack, the thermal safety of the battery pack is improved, and the heat dissipation device can be widely applied to various fields of automobile and aerospace.

An insert clamp secures a cutting insert having a central hole to a tool holder. The clamp includes a forward protrusion to be received in the central hole of the insert, a central body portion provided with a pressing part to press down the upper surface of the insert and a screw hole for a clamping screw to pass through, and a rear protrusion having a rear contact surface to come in contact with a rearward slanting surface of the tool holder. The forward protrusion is formed on the forward end of the insert clamp, an inside surface of the forward protrusion extends downward in a spaced state apart from the inner wall of the central hole of the insert, and a distal portion of the inside surface the forward protrusion is provided with a protuberance of convex curved surface to come in tangential contact with the inner wall of the insert. The pressing part is formed on the bottom surface of the central body portion of the insert clamp, and has convex curved surfaces to come in tangential contact with the upper surface of the insert on both regions of the bottom surface of the central body portion which is bisected by a central line passing through the forward protrusion and the screw hole.

A vane type fluid transmission device, comprising a stator (10), a rotor (20), at least one vane (34), at least one first lining (40) and at least one second lining (50), wherein the stator (10) A room (13) is formed inside, and the room communicates with the outside through a flow channel; the rotor (20) includes a body (21) and a main shaft (22), and the main shaft (22) is connected to the main body (21). The body (21) is eccentrically arranged in the chamber (13), and the outer periphery of the body (21) is in tangential contact with the inner wall of the chamber (13). The body (21) has at least one chute (23) along the diameter direction; the blade (34 ) are pivotally embedded in the chute (23), the blades (34) are in contact with the inner wall of the chamber (13), the first and second linings are respectively pivotally embedded in the stator (10), and the first and second linings are respectively connected to the The center of the circle acts as the center, and the blades are pivotally connected with the first and second linings, so that the blades follow the center of the chamber and move back and forth along the chute; the end of the blade in contact with the inner wall of the chamber forms a circle. The arc surface keeps the tip of the vane in tangential contact with the inner wall of the room, thereby improving the efficiency of fluid pumping and transmission, and reducing the difficulty of forming the room by machining the stator.