33results about How to "Stable preload" patented technology

The invention provides a tensile fixture, which belongs to the field of fixtures. The tensile fixture overcomes the problems that a conventional fixture cannot reliably clamp a tiny sample and becomes slack at high temperature and is especially applicable to tensile test of tiny samples under the conditions of normal temperature and high temperature. According to the invention, an elastic force released by a longitudinal spring exerts a continuous pretightening effect on a sample, the pretightening effect is more continuous and stable compared with a pretightening effect of a screw, and operation in the invention is simpler; in the process of drawing, the clamp force of a chuck increases with increase of a tensile force, a pretightening force can be continuously maintained at the same time, so relaxation of a material caused by thermal expansion can be effectively compensated, which guarantees that the sample is stably clamped and prevented from slipping in the process of drawing; and thus, the problems of slipping of a tiny sample caused by thermal expansion, a small size and the like in the process of drawing, inconvenient clamping and the like are effectively overcome.

The invention relates to a chuck having a sleeve, a chuck body, a plurality of chuck jaws, an adjusting mechanism configured to adjust relative movement between the chuck jaws and the chuck body, at least one locating member and a pushing mechanism. The locating member is disposed on the chuck body between the adjacent chuck jaws. When the adjusting mechanism drives the chuck jaws to approach to each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move towards the longitudinal axis. When the adjusting mechanism drives the chuck jaws to move away from each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move away from the longitudinal axis. Therefore, the operation is more convenient and safer; the aligning effect is precise and reliable, and the pre-tightening force is stable.

The invention discloses a cutting blade and a cutting tool provided with an adjustable structure. The cutting blade comprises an upper end face, a lower end face, a first side face, a second side face, a third side face and a fourth side face, wherein the upper end face interacts with the first side face to form a first cutting edge, and a second cutting edge is formed between the lower end face and the second side face; the second side face is located opposite to the first side face; a clamping groove is formed in the upper end face, a clamping slope is arranged in the clamping groove, and anincluded angle beta between the clamping slope and the upper end face is an acute angle; in the direction from the second side face to the first side face, the distance H between the clamping slope and the upper end face becomes larger gradually; the first cutting edge is in central symmetry with the second cutting edge; and the upper end face is in central symmetry with the lower end face. The cutting tool comprises the cutting blade, a pressing device used for pressing the blade, and a radial adjustment device used for adjusting the blade. The radial adjustment range of the blade is wide, the pre-tightening force can change along with the change of the radial adjustment size and is more stable, and firmer locking is realized.

The invention provides a lateral pressure spiral spring which is formed by rotating and bending a cylindrical body wound by using linear materials, wherein the axis of the cylindrical body is a central line of the spring, and basic parameters include a material linear diameter, an external diameter of the spring and a spiral angle; and the cylindrical body can be wounded into a cylinder or a ring shape connected end to end. The lateral pressure spiral spring is characterized in that the spiral angle is a variable. The front half circle of the spiral angle is a positive spiral angle, and the rear half circle of the spiral angle is a negative spiral angle; a transitional surface of break points of the spiral angle is formed between the front half circle and the rear half circle, and the absolute value of the positive spiral angle is larger than that of the negative spiral angle; and the spring is in a spiral raising structure as a whole. The spring can be applied to various mechanical application fields and particularly to the sealing field, is wide in stress range and can provide multidirectional stress compensation for elements, the stress compensation direction can be adjusted at any time along with the change of an external acting direction, and the spring can still provide enough stress compensation when pressure stress is not on the same horizontal surface but forms a certain angle with the horizontal surface.

The invention discloses a six-dimensional dynamometry platform with an embedded self-aligning decoupling dynamometry branch. The six-dimensional dynamometry platform comprises a first platform, a second platform, three embedded self-aligning vertical decoupling dynamometry branches, three embedded self-aligning horizontal decoupling dynamometry branches and three support frames. The first platformand the second platform are circular and are made by processing honeycomb aluminium plates. The embedded self-aligning vertical decoupling dynamometry branches, the embedded self-aligning horizontaldecoupling dynamometry branches and the support frames are mounted between the first platform and the second platform in a staggered mode. According to the six-dimensional dynamometry platform, aligning positioning of upper and lower steel balls and side dynamometry decoupling of tension-compression bidirectional dynamometry are realized; difficulty of a processing technology of the dynamometry branches is reduced; mounting and debugging are simple; cost is low; tension-compression pretightening force is adjusted through adjustment of gasket thickness; and continuous measurement precision of the dynamometry platform is ensured.

The invention discloses a shaft end sealing mechanism. The shaft end sealing mechanism includes an equipment end plate, a sealing seat, a locking nut and a compression sleeve. The sealing seat is installed on the equipment end plate. The sealing seat A rotating shaft is arranged inside the inside of the sealing seat, and a sealing material is arranged between the inner cavity of the sealing seat and the rotating shaft; the lock nut is installed on the sealing seat, the compression sleeve is arranged on the rotating shaft and It is located between the sealing material and the locking nut; turning the locking nut drives the shaft to move upward along the sealing seat, and the sealing material is squeezed and tightened through the compression sleeve to realize shaft sealing. end seal function. The present invention adopts an integral spiral pre-tightening structure, supplemented by a ball-type one-way check structure, and only needs to rotate one part of the lock nut to realize fast pre-tightening and timely locking, and the tensioning system can maintain a stable pre-tightening force , and can provide automatic compensation function, greatly increasing the service life of sealing materials.

The invention discloses a rotary three-way valve, which belongs to the field of control valves and solves the problems of inconvenient processing and installation of the rotary three-way valve and low accuracy of flow control. device, the driving device is connected to the valve body, and the valve body is connected to the valve seat to form a valve chamber. There is a planetary gear mechanism and a rotary slider. A slider gear is provided on the rotary slider, and the slider gear is meshed with the planetary gear mechanism for transmission. The side of the rotary slider facing the planetary gear mechanism is provided with a pin, which is fitted on the pin There is an elastic element, the elastic element is against the valve body, and the slider gear, the pin and the rotary slider are integrally formed. In the present invention, the rotary slider, the pin and the slider gear are connected as a whole, which reduces the difficulty of assembling the rotary slider and the slider gear, and ensures that the elastic element provides a stable pre-tightening force for the rotary slider.

The invention relates to a battery pack locking mechanism, comprising: a locking member and a locking fitting, the locking member includes a shell and an engaging portion; one of the shell and the locking fitting is fixed on The other battery pack is fixed at the fixed position of the battery pack; the engaging part can move between a first position and a second position relative to the casing; when in the first position, the engaging part A part of the engaging portion protrudes out of the housing to interlock with the locking fitting; in the second position, the engaging portion retreats into the housing to engage with the locking file is unlocked. The battery pack locking mechanism of the present invention enables the battery pack to be stably locked on the vehicle, and facilitates quick loading and unloading of the battery pack.

The invention relates to a high-speed rotor and a control moment gyro using the same. The high-speed rotor comprises a shell and a wheel body arranged in the shell, wherein the wheel body is rotatably assembled on the shell by utilizing two angular contact ball bearings as a support; bearing covers are respectively arranged at the axial outer sides of the two angular contact ball bearings; a drawbar penetrates through the wheel body coaxially and rotatably; the two bearing covers are respectively fixedly assembled on corresponding ends of the drawbar; and one of the bearing covers is in stationary fit with the shell, and the other one of the bearing covers is in pilot clearance fit with the shell along the axial direction of the wheel body. When the temperature in the working environment of the control moment gyro rises or falls, the cover in pilot fit with the shell can compensate for the difference of linear expansion values between the shell and the wheel body through the movement relative to the shell, thus the stability of the anticipated load of the two angular contact ball bearings can be ensured, and further the control moment gyro can be adapted to working environments with a relatively wide range of temperature difference, therefore the problem of a narrow range of applicable temperature of the high-speed rotor of the existing control moment gyro is solved.

The invention provides a method and system for intelligently adjusting the bearing pretightening force of the main shaft. The method and system are provided with a positioning guide block in the main shaft device, and the positioning guide block is driven by hydraulic pressure to move and drive the outer ring of the bearing to move, so that The contact angle of the inner and outer rings of the bearing can be adjusted to play the role of adjusting the preload of the bearing. At the same time, the application has established the best matching data table for different materials and preload in advance, and can automatically select the most suitable preload based on the material of the workpiece to be processed and automatically complete the preload operation of the bearing, so that The size of the bearing preload can be matched with the type of plate to be processed. In addition, the present application can also judge the actual wear condition of the bearing by detecting the moving distance of the outer ring of the bearing and the current preload of the bearing, and combining the theoretical relationship between the position of the outer ring of the bearing and the preload of the bearing. The amount of oil supply should be properly corrected in order to compensate for the impact caused by long-term wear of the bearing.

The invention relates to a turbocharger bearing sleeve and a turbocharger comprising the bearing sleeve. The bearing sleeve comprises a straight-sleeve-type sleeve body; the sleeve body is provided with an axial hole which is through in the axis direction; the inner sides of the pressing end and the vortex end of the sleeve body are each provided with a bearing positioning hole for containing an angular contact bearing; the diameter of each bearing positioning hole is larger than that of the axial hole; an annular boss is arranged at the bottom of the bearing positioning hole of the pressing end; and the diameter of the annular boss is smaller than that of the corresponding bearing positioning hole and larger than that of the axial hole. A wavy spring gasket is arranged in a hole of the annular boss of the pressing end and makes contact with the outer circle end faces of the angular contact bearings; the wavy spring gasket provides pre-tightening force for the angular contact bearings; and the annular boss limits the movement range of the angular contact bearings.

The invention provides a wheel bearing connecting structure. The wheel bearing connecting structure comprises a wheel hub which is rotationally fixed onto a vehicle suspension device, a ring-shaped inner wheel which is arranged on the outer peripheral surface of the wheel hub, a ring-shaped outer wheel which is arranged on the outer side of the inner wheel, and a wheel bearing which is provided with bearing ball beads which are arranged between the inner wheel and the outer wheel; and in addition, the inner peripheral surface on one side of the inner wheel and the outer peripheral surface of the wheel hub are integrated through a bolt structure. According to the wheel bearing connecting structure, an engineering step of track formation can be omitted, the durability and quality are improved, and a manufacturing project is simplified.

The invention discloses a gyro motor bearing unit and relates to the field of the design technologies of the bearings. The gyro motor bearing unit comprises a step shaft (12), a bearing A (19), a bearing B (20), an oil storage ring (16), an oil storage ring lining (18), an elastic lining (1) and a U-shaped clamping ring (10), wherein the bearing A and the bearing B are arranged on two sides of the middle part of the step shaft (12); the elastic lining and the U-shaped clamping ring are arranged between the bearings A and B; the U-shaped clamping ring is arranged between the elastic lining and the bearing A; the oil storage ring is arranged in a groove body which is formed in the middle part of the inner surface of the elastic lining; an oil storage ring lining is arranged between the oil storage ring and the groove body of the elastic lining. The gyro motor bearing unit overcomes such defects of the conventional gyro motor bearing unit as low rotation precision, short service life, low reliability and poor installation qualified rate; and the performance of the gyro motor bearing unit can be effectively improved.