182results about How to "Eliminate axial play" patented technology

The invention relates to a screw-nut gear-shifting mechanism for an automatic two-gear transmission of an electric car. The mechanism comprises an input shaft, an intermediate shaft and a fork gear-shifting mechanism, wherein the input shaft and the intermediate shaft are parallel to each other; a first-gear driving gear and a second-gear driving gear are fixedly arranged on the input shaft respectively; a second-gear driven gear, a first-gear driven gear, a main reduction driving gear and a synchronizer are sequentially arranged on the intermediate shaft respectively; the first-gear driving gear and the first-gear driven gear are normally engaged, and the second-gear driving gear and the second-gear driven gear are normally engaged; a main reduction driven gear is arranged to be matched with the main reduction driving gear, and during installation for usage, the main reduction driven gear is fixed on a differential mechanism flange plate through bolts; and a fork of the fork gear-shifting mechanism is sleeved with a joint sleeve of the synchronizer. According to the mechanism, a screw and screw-nut mechanism is adopted, so that the accuracy and the reliability of gear shifting are improved; and the mechanism is simple in structure, convenient to install and small in size, has a self-locking function and can prevent gears from loosening.

The invention relates to a magnetic levitation bearing system, in particular to a manual type bearing protection device. The manual type bearing protection device comprises a rotor, two bearing seats,two groups of bearing protection assemblies and a manual driving assembly; two ends of the rotor are in a circular truncated cone shape; the two bearing seats are arranged at the two ends of the rotor, and the two ends of the rotor extend into the bearing seats; the two groups of the bearing protection assemblies are symmetrically and slidably arranged in the bearing seats, cone-shaped holes which are matched with the ends of the rotor are formed in the bearing protection assemblies; and the manual driving assembly drives the bearing protection assemblies to axially move close to each other until the bearing protection assemblies are in contact with the rotor. The manual type bearing protection device can temporarily support the rotor when a magnetic bearing system fails, can manually protect the rotor, prevents damage caused by falling of the high-speed rotor, and improves the security of the system.

Provided is an electrically powered linear actuator, which averts ball screw lock up, is inexpensive and has excellent rotation performance. An output gear (5) configuring a deceleration mechanism (6) is fixed to a nut (18). Support bearings (20, 20) are disposed on both sides of the output gear (5) and the pair of support bearings (20, 20) are configured from a pair of roller bearings of the same specifications that can bear both thrust loads from the drive shaft (7) and radial loads applied through the output gear (5). The support bearings are installed in a housing (2a) via a washer (27), which is obtained from a ring-shaped elastic member. The internal diameter (D) of the washer (27) is formed to be larger than the external diameter (d) of the inner ring of the support bearing (20).

The invention discloses a planetary roller screw with a clearance eliminating nut. The planetary roller screw with the clearance eliminating nut is used for eliminating the axial clearance between a roller and a nut and the axial clearance between a roller and a screw at the same time. According to the technical scheme, on the basis that elastic elements (7 and 9) are added to half nuts (6 and 10) respectively for pretightening, the clearance eliminating nut (8) is used in cooperation, pretightening force is generated through the combined action of elastic deformation of the elastic elements (7 and 9) and elastic deformation of an elastic thin-wall radial plate A in the clearance eliminating nut (8), and therefore the effect of eliminating the axial clearance between the roller and the nut and the axial clearance between the roller and the screw is achieved. The planetary roller screw with the clearance eliminating nut is simple in structure, convenient to manufacture and high in practicability.

The invention discloses a dual-drum articulated multirope winding hoisting machine, which mainly consists of a main shaft unit 1, a disc brake 2, a universal coupling 3, a hydraulic station 4, an operation desk 5 and motors 6. The main shaft unit is arranged on and respectively fixed with a bearing support 7, and articulated by the universal coupling, other ends thereof are linked with the motor for carrying out synchronous direct connection drag, the two ends of an assembled braking disc 1.1 are provided with the symmetrical disc brake, the hydraulic station is used for providing brake pressure, and the two motors and the hydraulic station are controlled by the operation desk. The main shaft unit consists of the assembled braking disc, a fixed wound roll 1.2, a plastic lining board 1.3, a rope-retaining board 1.4, the main shaft 1.5 of the fixed wound roll, a rope-adjusting clutch 1.6, a nomadic wound roll 1.7, a left hub 1.8, two halves of brasses 1.9, the main shaft 1.10 of the nomadic wound roll and a right hub 1.11, wherein, the main shafts of the fixed wound roll and the nomadic wound roll are not in the same center line and have an included angle of 5 to 10 degrees. When in working, a container is lifted by two cable wires, thus effectively meeting the lifting needs.

The invention relates to a transmission device of a precise displacement actuator. The transmission device is characterized in that a transmission pair consists of a swivel nut and a screw; the swivel nut is supported in a supporting shell through a bearing piece; the bearing piece comprises a bearing inner clamping ring nut, a bearing outer retainer ring and two rolling bearings, wherein the tworolling bearings are respectively arranged at both sides of the bearing outer retainer ring; one of rolling bearing inner rings forms axial limit through a circular bead positioned on the swivel nut;and the bearing inner clamping ring nut is connected with the swivel nut through internal threads and acts on the other rolling bearing inner ring along a reverse axial direction to form the axial limit.

The invention discloses a high-speed elastic damping false twister spindle based on the sensor technology. The high-speed elastic damping false twister spindle based on the sensor technology comprises a mandrel, two sets of steel balls which are arranged on the radial outer side of the mandrel, and a big outer ring which is used for fixing the steel balls on the mandrel, wherein a small outer ring is arranged between each set of steel balls and the big outer ring, all the steel balls are fixed in the big outer ring through the small outer rings, a spring is arranged between one small outer ring and the big outer ring in the axial direction, and the spring axially and tightly presses the small outer rings. Due to the facts that the small outer rings are arranged between the steel balls and the big outer ring, plastic damping sleeves are arranged between the small outer rings and the big outer ring in an embedded mode to reduce radial vibration and axial vibration, and the spring which is arranged between the small outer ring and the big outer ring in a connected mode is arranged in the axial direction to eliminate the axial clearance, stable working of the high-speed elastic damping false twister spindle is ensured, and stability of spinning products is ensured. Due to the fact that a vibration sensor is in cooperation with an external circuit to carry out real-time online detection on vibration parameters of a false twister, the faults of the high-speed elastic damping false twister spindle can be predicted, and the spinning technology can also be adjusted according to the vibration parameters to achieve optimization of quality of yarn.

The invention discloses a sealing device for a large bearing. The sealing device comprises an outer skeleton, an inner skeleton and a labyrinth rubber sealing piece, wherein the outer skeleton is fixed to a bearing outer ring, the inner skeleton is fixed to a bearing inner ring, and the labyrinth rubber sealing piece is arranged between the inner skeleton and the outer skeleton; the inner skeletoncomprises an inner skeleton inner ring and an inner skeleton outer ring, and the width of the inner skeleton outer ring is less than that of the inner skeleton inner ring; and one end of the outer skeleton is fixedly connected with the inner circumferential surface of the bearing outer ring, the other end of the outer skeleton extends into a cavity formed by the inner skeleton inner ring, a support ring and the inner skeleton outer ring, the labyrinth rubber sealing piece comprises a water retaining cover, an upper sealing lip and a lower sealing lip, a first labyrinth cavity is enclosed by the water retaining cover, the inner skeleton outer ring and the upper sealing lip, and a second labyrinth cavity is enclosed by the lower sealing lip, a sealing toothed groove and the inner skeleton inner ring. According to the sealing device, the purposes of internal oil seal and external dust prevention can be realized, the sealing dust prevention effect is good, tests show that the linear speedof the sealing device can reach at least 12 m/s, and the physical life can at least reach 5000 h.

The invention discloses a gap adjusting component which is a plastic piece and comprises a cylinder part with an inner cavity. A first end of the cylinder part is opened, and a second end of the cylinder part is provided with an axial limiting end wall. An axial gap adjusting corrugated edge is arranged at the first end of the cylinder part. The corrugate fluctuating direction of the axial gap adjusting corrugated edge is parallel to the axial direction of the cylinder part. After the gap adjusting component is applied to an electric lifting adjusting device of an automobile seat, the axial gap of an output shaft for driving a motor is eliminated through the deformation of the axial gap adjusting corrugated edge of the gap adjusting component, and the tolerance requirement of a reduction gearbox body and a worm is lowered. The gap adjusting component has the advantage that by means of the gap adjusting component, an adjusting spring, a wear-resistant gasket and an oil-contained bearing in the prior art are replaced to eliminate the axial gap, the number of parts is decreased, assembling is simplified, and cost is reduced. In addition, the gap adjusting component can be designed in a modularized mode.

The invention discloses a bars reducing and sizing mill which is of a short stress line type. The bars reducing and sizing mill comprises a roll-gap adjuster, a pull rod assembly, a frame, a beam, a roll assembly and a guide beam. The roll assembly comprises an upper roll assembly and a lower roll assembly and further comprises a pull rod, butterfly spring absorbers and a spherical anti-axial play device; the butterfly spring absorbers are disposed at upper and lower ends of the pull rod and used for eliminating a gap between the pull rod and a copper nut; the spherical anti-axial play device is used for eliminating an axial gap between the pull rod and a bearing block; the butterfly spring absorbers surround the pull rod; the pull rod assembly allows a central distance of upper and lower rolls of the mill to change by 0.1mm.

The invention discloses a motor assembly, in particular a motor assembly of a vehicle starter. The motor assembly comprises a motor and a speed change mechanism, wherein the motor comprises an armature shaft; the speed change mechanism comprises an input gear; the input gear is arranged on the armature shaft through a spline; the spline comprises outer spline teeth and inner spline teeth; the outer spline teeth are formed on the armature shaft; the inner spline teeth are formed in the input gear and engaged with the outer spline teeth; and at least one of a pair of tooth side surfaces of each spline tooth inclines relative to the central axis of the armature shaft. The invention further discloses the vehicle starter comprising the motor assembly. A commutator and an electric brush of the motor can be prevented from being worn due to axial endplay of the armature shaft.

The invention provides an elastic cone wedge-caulking type anti-disengagement nut mainly formed by combining a thick nut body with a conical hole in the right end and a thin nut body with an outer cone boss at the left end. At least two blind grooves with one ends closed and the other ends closed are evenly distributed in each of the two ends of the thin nut body. During use, because of the wedge-caulking of a cone and the tightening effect of the blind grooves, the axial clearance and the radial clearance between the elastic cone wedge-caulking type anti-disengagement nut and a thread of a bolt can be effectively eliminated, and the anti-disengagement and retreating stopping effects of the elastic cone wedge-caulking type anti-disengagement nut are achieved. According to the elastic cone wedge-caulking type anti-disengagement nut, the plane wedge-caulking principle is ingeniously applied in the three-dimensional cone and is combined with the blind groove elastic shrinkage principle, the structure is simple, the anti-disengagement and retreating stopping effects are stable and reliable, installation and detachment are convenient, and the elastic cone wedge-caulking type anti-disengagement nut can be widely applied to various occasions, having strict anti-disengagement requirements for thread tightening pieces, especially occasions where air planes, automobiles and high-speed trains have special requirements for disengagement prevention of the tightening pieces.

The invention provides a friction welding machine limiting rod clearance-eliminating device, which comprises a shell, an ejector rod, a wedge block and a power device. The ejector rod is horizontally arranged in the shell; the wedge block is vertically arranged in the shell; a first inclined surface of the ejector rod and a second inclined surface of the wedge block overlap together; the power device is connected with the wedge block; upward movement of the wedge block is transformed into horizontal movement of the ejector rod; and through arranging a sliding chute or a spring, automatic reset can be realized after use. According to the friction welding machine limiting rod clearance-eliminating device provided by the invention, the ejector rod is pushed through the wedge block so as to move axially, so that an axial clearance generated during welding piece clamping is eliminated; and the inclined surfaces are self-locked, so that the friction welding machine limiting rod clearance-eliminating device is reliable in eliminating the clearance, simple and effective in structure, and more accurate in abrasion value measurement.

The invention discloses a tape spool centering, positioning and clamping device, and belongs to clamping tools. An existing tape spool centering, positioning and clamping device has the defects that a tape spool is prone to axially moving, and a tape-shaped article is prone to damage. The tape spool centering, positioning and clamping device comprises a fixing shaft, a fixing pipe, a left supporting baffle, a right supporting baffle, two clamping plates, two guiding wheels, first elastic pieces and second elastic pieces. The fixing pipe is provided with a nut stop ring limiting piece, the two clamping plates are located between the left supporting baffle and the right supporting baffle, clamping space is formed between the two clamping plates, the first elastic pieces are arranged between one clamping plate and the left supporting baffle and between the other clamping plate and the right supporting baffle respectively, the two first elastic pieces are the same in performance, the guiding wheels are arranged on the radial outer side of the clamping space, a supporting shaft between one guiding wheel and the left supporting baffle and a supporting shaft between the other guiding wheel and the right supporting baffle are respectively provided with one second elastic piece, and the second elastic pieces are the same in performance. According to the tape spool centering, positioning and clamping device, the two sides of the two clamping plates and the two sides of the guiding wheels are provided with the elastic pieces with the same performance to provide clamping force, and centering and positioning in the adjusting process are achieved.

The invention discloses a four-axis stamping robot which comprises a base, a first shaft seat, a second shaft seat, a first servo motor, a second servo motor, a first shaft arm, a second shaft arm, athird servo motor, a four-axis fixing part and a fourth servo motor. The first shaft seat is fixedly connected to the top of the base. The second shaft seat is rotationally connected to the top of thefirst shaft seat. The first servo motor is fixedly connected to the top of the second shaft seat. The second servo motor is fixedly connected to the front face of the second shaft seat. The lower endof the first shaft arm is rotationally connected with the back face of the second shaft seat. One end of the second shaft arm is rotationally connected with the upper end of the first shaft arm. Thethird servo motor is fixedly connected to the front face of the second shaft arm. The four-axis fixing part is rotationally connected to the other end of the second shaft arm. According to the four-axis stamping robot, through cooperation of the above structures, a mechanical gripper connecting part in the four-axis stacking robot is improved, a mechanical gripper can be adjusted in the six freedom degree directions, and the adjusting precision is high.