7 results about "Backlash" patented technology

The invention relates to the field of rolling, and discloses an anti-backlash device, an anti-backlash control method and rolling equipment, the anti-backlash device comprises two bearing seats, a bearing set, a jacking structure and a hydraulic driving part, the two bearing seats are provided with mounting cavities in a penetrating mode in the first direction, one side face of each bearing seat is provided with a containing cavity, and the containing cavities communicate with the mounting cavities; the two ends, in the first direction, of the roller are each provided with a rotating shaft, the rotating shafts are located in the corresponding installation cavities, each installation cavity is internally provided with a bearing set, each bearing set comprises a third bearing, the jacking structure abuts against the third bearing, the hydraulic driving part is in transmission connection with the jacking structure, and the hydraulic driving part drives the jacking structure to abut against the third bearing. The hydraulic driving part drives the jacking structure to continuously and stably apply the pre-tightening force to the third bearing, a thread jackscrew structure which is prone to loosening and losing efficacy is replaced, the problem that the pre-tightening force is attenuated or lost due to vibration and loads is effectively solved, and therefore the anti-backlash effect can be reliably maintained for a long time.

This invention provides a multi-stage reduction gearbox with a flexible shaft and an adaptive zero-backlash gearbox, and its backlash elimination assembly method. The gearbox includes a housing and a multi-stage gear transmission mechanism, and also includes a backlash elimination mechanism. The backlash elimination mechanism includes a backlash elimination gear set meshing with each stage of the gear pair, a flexible shaft, and a locking mechanism, forming a parallel backlash elimination transmission branch. During assembly, a reverse preload is applied to the backlash elimination gear set to cause the flexible shaft to twist and deform, and then the locking mechanism locks it to maintain an elastic preload state. This invention uses a single backlash elimination mechanism to simultaneously eliminate backlash in multiple stages, simplifying assembly; it utilizes the elastic restoring torque of the flexible shaft instead of rigid fixing, providing impact resistance and reliable operation; it can adaptively compensate for backlash after gear wear, achieving zero-backlash transmission throughout its lifespan; it reduces the requirements for bearing precision and significantly reduces manufacturing costs.

This invention provides a device and method for adjusting clamping force with high stability, belonging to the field of machining clamping technology. The device includes a support base, a positioning sleeve, a compression spring, a guide key, a lead screw nut, a lead screw, and a flange. The positioning sleeve forms an axial sliding fit with the support base via the guide key. The compression spring is installed between the positioning sleeve and the support base. The lead screw and lead screw nut form a transmission pair. The flange preloads the lead screw nut to eliminate transmission backlash. This invention achieves pressure retention even when power is off by storing energy in the compression spring. The clamping force is precisely controlled by the spring compression, solving the problems of unstable force, the need for a constantly powered motor, and easy loosening and deformation in traditional clamping methods. It has advantages such as constant clamping force, no backlash, high efficiency and reliability, and long service life, and is suitable for positioning and clamping various mechanical parts during machining.

This application discloses a gear backlash detection device, relating to the field of gear backlash detection. It includes a chassis, a fixed base, a movable base, an L-shaped rod, and a fixing assembly. The L-shaped rod has a locking component inside, and the chassis has a movable assembly inside. The outer expansion block expands outward through the cooperation of the insertion rod and the outer expansion block, thereby causing the inner support plate to expand outward via a compression spring and the limiting action of the insertion rod. The inner support plate then presses and fixes the inner side of the gear. This device is easy to install and can accommodate gears with different inner diameters. The movable base is moved by rotating the threaded rod. After the movable base moves to the appropriate position, the rotating disk is released. Under the reset action of the tension spring, the rotating disk drives the insertion cylinder to cooperate with the fixed cylinder, locking the fixed cylinder and thus the threaded shaft. This facilitates fixing the threaded rod and prevents the movable base from moving due to the rotation of the threaded rod, which could affect gear meshing.

The utility model discloses a kind of driving gear anti-backlash devices, including driving shaft, main shaft, fixed driving gear, anti-backlash driving gear, disc spring, limit flange, expansion sleeve, locating nut and shell;Driving shaft is coaxially fixedly connected with main shaft through expansion sleeve, main shaft is installed in shell through a group of support bearings, fixed driving gear is fixedly connected on main shaft, anti-backlash driving gear is installed on main shaft through the sliding installation structure of axial direction;Limit flange is installed on main shaft, disc spring is installed between limit flange and anti-backlash driving gear;Locating nut is installed on main shaft by thread, limit flange is pressed by locating nut.In transmission process, the axial position of anti-backlash driving gear will be adjusted by the elastic force of disc spring, so that anti-backlash driving gear keeps close contact with driven gear at all times, plays the role of self-adapting anti-backlash, thereby eliminating or reducing the movement error and the problem of vibration caused by uneven gap.

To mount a non-rotating tool on a tool table that can rotate the tool via a gear train with backlash, and to prevent the tool from wobbling due to backlash when the tool is stopped and in use without complicating the structure, the tool comprises: a spindle (33) that holds the cutting tool (85) in a manner that allows it to be loaded and unloaded in the direction of axis (C3); a gear train (33) that transmits rotation to the held cutting tool (85); a pull rod (34) that moves the cutting tool (85) in the direction of axis (C3); and a piston (36) configured to move in the direction of axis (C3) between a rearmost position and a foremost position, wherein a coupling (convex-concave shape (36c, 34c)) is formed between the piston (36) and the pull rod (34) that allows them to rotate integrally in a contact state, and the piston (36) stops at an intermediate position between the rearmost position and the foremost position.

This application discloses an automatic detection method and system for pulley runout in water pumps. The method includes: sequentially acquiring the angular position and displacement values ​​during the first forward rotation, reverse rotation, and second forward rotation of the pulley under the same clamping conditions; reversing the reverse displacement data and extracting low-order periodic components from both the reverse and first forward displacement data, and obtaining the backlash angle through cross-correlation to correct the angular coordinates of the reverse data; interpolating the three displacement data segments to the same angular grid, fitting the positional variation term based on the difference between the two forward data segments, and correcting the first forward displacement value accordingly; then using the corrected three displacement values ​​as input, solving for the common geometric components through robust least squares, and using the difference between the maximum and minimum values ​​within one revolution as the pulley runout value. This application can reduce the impact of commutation backlash, clamping positional variations, and abnormal sampling on the detection results, improving the repeatability and reliability of the detection.