114results about How to "Curb rebound" patented technology

To provide a trigger switch having a simple structure that is capable of reducing bouncing when the contacts are switched ON/OFF, the trigger switch includes a switch mechanism integrated in a single assembly a power control unit that turns a plurality of switches provided on the switch mechanism ON/OFF depending on a degree of retraction of the control unit by moving a pressing member over a top of a seesaw-shaped switching bar, a motor brake and control element short-circuit unit that drives a movable armature having two short-circuit contacts and is sandwiched and held between two springs, and a speed control unit that slides a plurality of moving contacts disposed in parallel over sliding contacts disposed on a sliding circuit substrate so as to control both the supply of power and a control element, and thus control the rotation speed of a motor.

To provide a steering apparatus having an excellent operationality and capable of suppressing backlash and preventing an axis deviation of the steering shaft. A line R connecting the centers of two fixing members 16, 17 is shifted with respect to an axis line of an inner column 11, and thus a component Fv of a force transmitted from the fixing members 16, 17 to the inner column 11 via an outer column 21 is applied to press the inner column 11 in a direction orthogonal to the line R connecting the centers of the two fixing members 16, 17. It is, therefore, possible to reduce backlash between the inner column 11 and the outer column 21.

A disk brake for a vehicle includes: a caliper bracket; a pair of caliper support arms; pad guide grooves that have outer side surfaces, inner side surfaces and opposed surfaces; and lug pieces that protrude on both side parts of back plates of friction pads supported by the pad guide grooves through a pad retainer, the pad retainer including a pair of retainer parts, a connecting piece and pad resilient parts, wherein: the retainer parts include inner side pieces arranged along the inner side surfaces of the pad guide grooves, outer side pieces arranged along the outer side surfaces of the pad guide grooves and interior pieces that connect the outer side pieces to the inner side pieces; and the outer side pieces include impact suppressing parts that restrain the lug pieces from colliding with the outer side surfaces through the outer side pieces.

In position tandem control in which one movable member is driven by two motors, an output of the integral element of the velocity control unit in the control system for one motor is copied to the integral element of the velocity control unit in the control system for the other motor. A preload is added to a torque command output from each of the velocity control units in the motor control systems for two motors so that torques in mutually opposite directions are generated to suppress backlash between gears.

A vehicle seat sliding device includes: a first rail adapted to be fixed to one of a vehicle floor and a seat; a second rail adapted to be fixed to the other one of the vehicle floor and the seat, and coupled to the first rail in a relatively movable manner; an engagement member, which selectively limits and permits the relative movement of the first and the second rails; an operation member configured such that operating force to cancel the restriction of the relative movement in the second rail is transmitted to the engagement member; and a cover mounted on the first end of the second rail to close the first end. The cover has an engagement piece, which engages with a support wall provided in the second rail and restricts the pivoting of the cover when pressed against the operation member.

An inner ring is configured to simultaneously ensure the strength thereof and the dimensional accuracy of a female spline portion of a shaft hole thereof in the case where the female spline portion is subjected to heat treatment. Also it is configured to suppress the backlash of spline fit with a shaft. The inner ring is mounted in a constant velocity universal joint for transmitting torque while the inner ring is allowed to be angularly displaced relative to an outer ring and is spline-fitted to a shaft inserted into a shaft hole formed through the inner ring. The inner ring has a hardened layer by means of heat treatment which is formed only in an axial central portion of the shaft hole, but is not formed in remaining inner diameter surface other than the axial central portion.

A small unmanned plane undercarriage buffer relates to the field of aviation aircrafts and solves problems of low buffering efficiency, easy bounce, low reliability of a present flat spring type buffer. The small unmanned plane undercarriage buffer comprises an external cylinder, a first spring on the external cylinder, an internal cylinder having a damping hole, an air sac between the external cylinder and the internal cylinder; an upper joint, a lower joint, a piston rod extending into the internal cylinder, a piston, a damping plate, a pressure-limiting valve, a check valve, a guide sleeve and a locking cover, wherein the piston rod is orderly covered with the piston, the damping plate and the pressure-limiting plate; the piston rod is orderly covered with the check valve, the guide sleeve and the locking cover; the check valve, the guide sleeve and the locking cover are all disposed in the external cylinder; an internal-external cylinder annular oil storage cavity is formed between the internal cylinder and the external cylinder; the damping plate axially moves along the piston rod; the pressure-limiting plate limits maximum damping force to a preset valve during compression stroke; after the locking cover is tightly screwed, the guide sleeve, the check valve and the internal cylinder are axially pressed to the lower joint; the check valve controls communication between the internal-external cylinder annular oil storage cavity and a right cavity of the internal cylinder; and two ends of a first spring are respectively pressed against the upper and lower joints. The small unmanned plane undercarriage buffer possesses high buffering efficiency, uneasy bounce, stable performance and great reliability.

The invention discloses a manufacturing method for a titanium welded pipe. The manufacturing method mainly comprises the following steps of: filling a titanium tape coil into an uncoiler, and pulling out a titanium tape which then enters a forming device; rolling and bending the titanium tape through a mold, thus forming the tape into an open pipe blank; welding the pipe blank through an argon arc welding machine to form a closed titanium welded pipe; sending the closed titanium welded pipe into a sizing device, and rolling the titanium welded pipe in the sizing device by a mold to fix the outer diameter of the titanium welded pipe; heating the titanium welded pipe which moves forward to enter an induction annealing device so as to eliminate uneven stress generated in welding; then straightening the pipe in a pull-out straightening device, measuring the diameter of the pipe in a laser diameter measuring device, and detecting the pipe at an eddy current inspection station; and finally cutting the pipe at a sizing cut-off station through a flying sawing machine in a sizing manner, and sending the formed titanium welded pipe into a finishing line. According to the manufacturing method, continuous and stable running can be realized, and the operation efficiency of an overall production line can be improved by more than 20%.

To recover the axial forces transmitted by a rotating shaft, a bearing assembly includes a plurality of distributed bearing units. Each bearing unit comprises: a stationary base; a resilient member having a stationary portion and a portion that is completely movable in a main direction of the forces to be supported; and a bearing surface that defines, together with the shaft, a water film. The bearing surface is connected to the movable portion. The minimum radius of the bearing surface is between 1 m and 3 m. The resilient member and the base define at least one water chamber. A plurality of ducts are arranged so as to connect the chambers together, thereby defining a closed circuit.

A movable-mirror drive mechanism of a camera includes a main mirror held by a main-mirror holding frame rotatable between a viewfinder light-guiding position and a retracted position; a sub-mirror held by a sub-mirror holding frame that is rotatably supported by the main-mirror holding frame, wherein the sub-mirror holding frame is positioned in a jutting-out position when the main mirror is in the viewfinder light-guiding position, and the sub-mirror holding frame is retracted with the main mirror when the main mirror is in the retracted position; and a vibration control member which rotates in association with rotation of the main-mirror holding frame and holds the sub-mirror holding frame in the jutting-out position to prevent the sub-mirror holding frame from rotating toward the sub-mirror retracted position when the main mirror rotates to the viewfinder light-guiding position.

A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accurate fuel-injection control.

In a numerical controller having a tool tip point control function, a provisional tool tip point movement path calculation unit calculates a fourth movement path of a tip point of a tool on the basis of a third movement path obtained by linearly interpolating a second movement path for moving a control point of the tool along the second movement path, and a post-linear interpolation movement instruction output unit outputs a third movement instruction if it is determined that the difference between a first movement path for moving the tip point of the tool along the first movement path and the fourth movement path is within a predetermined tolerance.