102results about How to "Achieve preload" patented technology

The invention relates to an off-resonance three-dimensional elliptical diamond vibration cutting method and device and belongs to a cutting method and device. Four piezoelectric stacks which are placed in parallel are driven according to input signals, and phase angles of the input signals are different in a two-to-two mode. The piezoelectric stacks push a pushing face on a tool apron hinge base body to enable various hinges to produce micrometric displacement, therefore a diamond cutter point three-dimensional elliptical movement track capable of being adjusted can be obtained, the track can be adjusted initiatively through frequency, amplitudes and phase differences of driving signals of the piezoelectric stacks and installation positions of the piezoelectric stacks. The off-resonance three-dimensional elliptical diamond vibration cutting method and device can meet requirements for various difficult-to-machine materials and different face types through diamond cutting, and obtains the best cutting machining performance.

The invention discloses a wearable exoskeleton upper-limb rehabilitation robot. The wearable exoskeleton upper-limb rehabilitation robot comprises an arm adjustment component, a shoulder joint flexion and extension component, a shoulder joint folding and unfolding component, an upper-limb rotational motion component, an elbow joint flexion and extension component,, a front-arm rotational motion component, a wrist joint flexion and extension component and a frame motor component. The arm adjustment component is fixed to the frame motor component. The arm adjustment component, the shoulder joint flexion and extension component, the shoulder joint folding and unfolding component, the upper-arm rotational motion component, the elbow joint flexion and extension component, the front-arm rotational motion component and the wrist joint flexion and extension component are connected in sequence. The wearable exoskeleton upper-limb rehabilitation robot has the advantages that six-freedom-degree motion of flexion and extension as well as inward folding and outward unfolding of shoulder joints, internal and external rotation of upper arms, flexion and extension of elbow joints, internal and external rotation of front arms and flexion and extension of wrist joints can be achieved, and one-freedom-degree motion of arm adjustment can be also achieved; all the joints of the upper-limb rehabilitation robot are driven indirectly, the weight of robot arms is reduced, weight loading capability of the robot arms is improved, mechanical structure is simplified, and flexibility of the robot is improved.

The invention discloses a cotton collecting device of a roving machine, comprising a blowing and suction cleaner and a cotton collector, wherein the blowing and suction cleaner is positioned above a machine body; the cotton collector is positioned at the rear side of the machine body; the blowing and suction cleaner is provided with an air blowing pipe, an air suction pipe and a dust discharging pipe, wherein pipe orifices of the air blowing pipe and the air suction pipe face toward the machine body of the roving machine; the cotton collector is provided with a cotton collecting groove which is opened upwards and a rotary type annular belt which stretches along the length direction of the cotton collecting groove; and the body of the rotary type annular belt is provided with a clean scraping plate which is appropriate to the bottom inside the cotton collecting groove. The cotton collecting device is characterized in that the body of the rotary type annular belt is also provided with flexible elastic scraping strips which can scrape cotton wastes attached to the inner walls of both sides of the cotton collecting groove; the belt body carrying with the flexible elastic scraping strips can repeatedly continuously scrape from one end of the cotton collecting groove to the other end of the cotton collecting groove simultaneously along the inner walls of both sides of the cotton collecting groove in the rotary process of the rotary type annular belt, and the cotton wastes attached to the inner walls of both sides of the cotton collecting groove are scraped to drop into the bottom inside the cotton collecting groove. The invention is convenient for the synchronous scrape of the clean scraping plate and beneficial to keeping better cotton collecting effect.

The invention provides a crane, a guying mast and a pulling pre-tightening device of the guying mast. The pulling pre-tightening device comprises a first base, a second base, a movable lug, an elastic component and an adjustment cylinder, wherein the movable lug is located between the first and second bases; the first end of the elastic component is connected with the first base and the second end of the elastic component is connected with the first end of the movable lug; and the first end of the adjustment cylinder is connected with the second base, and the second end of the adjustment cylinder is connected with that of the movable lug. By telescopic movement of the adjustment cylinder, the pulling point position of a front tightening steel wire rope and the guying mast is changed, the effect of adjusting the pre-tightening force of the front tightening steel wire rope is achieved, and the structural rigidity of the whole boom can be adjusted.

The invention discloses a roller bearing preload adjustment structure and method. The roller bearing preload adjustment structure includes: a roller bearing capable of being installed on a transmission shaft; a bearing seat supporting the roller bearing, and the bearing seat is installed in a box On the body, and the inner ring of the bearing seat is provided with an internal thread; the bearing lock nut is provided with an external thread that engages with the internal thread on the bearing seat, and the inner side of the bearing lock nut is in contact with the roller bearing the outer ring abutment. The roller bearing preload adjustment structure disclosed in the present invention adjusts the bearing lock nut when adjusting the axial positioning of the roller bearing. Since the bearing lock nut and the bearing seat are threaded, the bearing lock nut rotates One turn, forward or backward by one pitch, so as to ensure that the clearance and preload of the roller bearing meet the technical requirements, and realize the axial position adjustment of the transmission parts such as the gear on the transmission shaft. The use of grinding parts is reduced, and the adjustment can be realized only by rotating the bearing lock nut, which has high efficiency.

The invention provides a passive clamping type piezoelectric actuator and relates to a piezoelectric actuator. The invention aims to solve the problems that the adjustment of the pretightening force of the existing passive clamping type piezoelectric actuator is controlled in cooperation with interference, so the control flexibility is poor, and the structural type of the clamping amplification structure is complex. The passive clamping type piezoelectric actuator provided by the invention comprises a first clamping mechanism, an actuating mechanism, a second clamping mechanism and a guide rail, wherein the first clamping mechanism and the second clamping mechanism are arranged in sequence from right to left, and the guide rail penetrates through the middle parts of the first clamping mechanism and the second clamping mechanism in sequence, and the actuating mechanism connects the first clamping mechanism and the second clamping mechanism. The passive clamping type piezoelectric actuator provided by the invention has small size and can realize self-locking when a power failure occurs, a clamping device is provided with a triangle amplifying mechanism, which can amplify the displacement of a clamping piezoelectric stack, thus reducing the difficulties of processing and assembling. The passive clamping type piezoelectric actuator is applied to the micro drive process.

The invention relates to an active reinforced filling wall and a construction method. The active reinforced filling wall comprises a hollow tubular anchoring agent, and the construction method is as follows: 1 the length of an anchor rod or an anchor cable is greater than the thickness of the wall; 2 the hollow tubular anchoring agent is of a hollow tube shape alternatively prefabricated by an anchoring agent and daub which are separated by a polyester film, and the anchoring rod or the anchoring cable is embedded with the hollow tubular anchoring agent; 3 the anchoring rod or the anchoring cable is laid in a predetermined position on a template; 4 a filling material is filled; 5 the template is dismounted; 6 a tray and a screw cap or a rigging are mounted; 7 the anchoring rod or the anchoring cable is rotated, the polyester film of the hollow tubular anchoring agent is cracked at once, the anchoring agent and the daub react after being mixed, and the anchoring rod or the anchoring cable is integratedly anchored with consolidated filling material around; and 8 pre-tightening force is applied. According to the active reinforced filling wall and the construction method, due to the adoption of a solution of embedding the hollow tubular anchoring agent on the anchor rod body, the problems that reinforcing ribs are difficult to be laid on the wall, the early strength of a masonry wall is low and a long time is needed to increase the strength are solved; the anchor rod or the anchor cable is transversely consolidated in the wall by the anchoring agent and the pre-tightening force is applied.

The invention provides a fixing clamp for an automobile brake caliper. The fixing clamp comprises a fixing plate structure, a pre-tightening mechanism and a clamping mechanism; the fixing plate structure comprises a fixing plate and a positioning plate; the positioning plate is vertically arranged on the left end surface of the fixing plate; the fixing plate is fixedly connected with the positioning plate; the positioning plate is provided with two oblong holes formed side by side; the pre-tensioning mechanism comprises a positioning block, an arc-shaped positioning plate and four elastic mechanisms; each oblong hole is internally and slidably provided with two corresponding elastic mechanisms; the end portions, away from the oblong holes, of all the elastic mechanisms are connected with the positioning block; the arc-shaped positioning plate is hinged to the positioning block; the clamping mechanism comprises a driving mechanism and a clamping block; the driving mechanism is arrangedon the right end surface of the fixing plate; the extension end of the driving mechanism is connected with the clamping block; and the clamping block directly faces the two oblong holes. Through the fixing clamp for the automobile brake caliper, the technical problem that conventional automobile brake caliper clamps cannot hold workpieces stably is solved.

The invention discloses a linear ultrasonic motor stator and an electric excitation method thereof. The stator comprises a stator elastic body and piezoelectric ceramic pieces, wherein an open slot isformed in the stator elastic body along the length direction, and the stator elastic body is divided into a driving body and two symmetrical driving legs by the open slot; the piezoelectric ceramic pieces in axial symmetry are attached to the two opposite outer side surfaces of the two driving legs, and driving feet extending outwards are arranged at the upper ends of the two driving legs respectively; and the piezoelectric ceramic pieces are coated with an electrode layer. The electric excitation method comprises the steps of 1) bonding the piezoelectric ceramic pieces; 2) preparing electrifying electrodes; and 3) simultaneously exciting local second-order bending vibration of the driving legs and overall first-order longitudinal vibration of the stator twice by using two paths of same-frequency sinusoidal voltage signals, and finally realizing forward and reverse movement of a driving rotor. According to the invention, the local second-order bending vibration of the two driving legsof the stator and overall first-order longitudinal vibration of the stator are combined and degenerate, and elliptical vibration of the driving feet is achieved.

The invention relates to an axial deformation measurement tooling of dual-inner ring dual-row ball bearings. The axial deformation measurement tooling for the dual-inner ring dual-row ball bearings comprises a pretensioning device for applying a set preloading load to the dual-inner ring in the axial direction of a bearing; the measurement tooling further comprises a support frame for supporting the dual-row ball bearing in a pretensioning state and an axial loading device for axially loading the bearing in the pretensioning state; one of the support frame and the axial loading device which cooperate with each other correspondingly stops an outer ring of the bearing, and the other of the support frame and the axial loading device correspondingly stops an inner ring of the bearing; and themeasurement tooling also includes a measurement device for measuring the axial deformation of the dual-row ball bearing in an axial loading state. The measurement tooling can measure the axial deformation of the bearing, which can avoid the situation that the axial pretensioning forces of the inner rings of the bearings are inconsistent during manual loading due to individual differences of the detecting personnel, and can make the measurement result of the axial deformation of the inner ring more accurate.

The invention discloses a wheel nut tightening device which comprises a movable platform and an automatic nut tightening device. The movable platform comprises wheels, a vehicle frame, a rail plate, alifting hydraulic cylinder, a pushing hydraulic cylinder and an installing base plate, the lifting hydraulic cylinder is used for adjusting the height between the rail plate and the vehicle frame, the installing base plate can slide front and back along the rail plate, and the pushing hydraulic cylinder is used for controlling the installing base plate to slide front and back on the rail plate; and the automatic nut tightening device comprises a power device, a first coupling, a dynamic torque transducer, a second coupling and a tightening device, and the tightening device comprises a shell,a transmission shaft, a driving gear, a driven gear and a driven shaft. According to the wheel nut tightening device, dynamic torque transducer is used for achieving dynamic torque monitoring of wheelnuts in the tightening process, accurate control over the wheel nut tightening force is achieved, and meanwhile, the power device is used for driving for quickly and easily complete assembly of the wheel nuts.

The invention discloses full-automatic cooked meat processing equipment for production of meat products. The full-automatic cooked meat processing equipment comprises an equipment support, and the equipment support is fixedly arranged on the ground. A support plate is arranged above the equipment support, and a protection case body is arranged above the support plate. A meat feeding device is arranged at the upper right end of the support plate, and a compaction device is arranged on the left side of the meat feeding device. The compaction device is composed of a mounting seat, a compaction cylinder, a connecting piece, a compaction seat, tension springs, a guide wheel shaft, a guide wheel, a compaction belt and a driving motor II, wherein the mounting seat is positioned under an upper pressing frame and is fixedly connected with the middle position of the lower surface of the upper pressing frame, and the compaction cylinder is arranged in the mounting seat in a sleeving mode; the connecting piece is fixedly connected with the lower surface of a cylinder rod of the compaction cylinder, and the compaction seat is positioned under the connecting piece and is rotationally connected with the connecting piece; the tension springs are respectively positioned on the left side and the right side of the compaction cylinder, one end of each tension spring is fixedly connected with the upper pressing frame, and the other end of each tension spring is fixedly connected with the compaction seat; the guide wheel shaft is positioned in the compaction seat and is rotationally connected with the surface of the inner side of the compaction seat, and the guide wheel is arranged outside the guide wheel shaft in the sleeving mode; the compaction belt is arranged outside the guide wheel inthe sleeving mode; and the driving motor II is fixedly connected with the rear surface of the guide wheel shaft. The full-automatic cooked meat processing equipment has the beneficial effects of simple structure and good practicability.

The invention relates to a nut pre-tightening tool. The nut pre-tightening tool comprises a transmission device and output devices, wherein the transmission device comprises a rack and a driving gear,the driving gear is arranged on the rack through a bearing and can rotate along the axis of the bearing, each output device comprises a tightening shaft arranged on the rack, as well as a driven gear, a friction plate, a compression spring and a limiting piece which are sequentially arranged on the tightening shaft in a penetrating mode, each tightening shaft can rotate with the tightening shaftas the axis, the end of each tightening shaft is connected with a sleeve, each driven gear is meshed with the driving gear and can rotate along the axis of the corresponding tightening shaft, and twoor more sets of output devices are available. According to the nut pre-tightening tool, a plurality of nuts can be tightened at a time, so that the pre-tightening efficiency is improved, meanwhile, the nut pre-tightening tool can accurately control the pre-tightening torque of each bolt, then the situation that the post-procedure operation is difficult due to the fact that the pre-tightening torque is too large is avoided, the operation is easy, and the use is convenient.

The invention discloses a flat wire automatic unloading forming machine of a flat wire hairpin motor of a new energy automobile. An automatic wire pre-feeding mechanism, a flat wire straightening mechanism, a profiling cutter lossless enameled sheath removing mechanism, a flat wire feeding mechanism, a flat wire chamfering and primary cutting mechanism, a hairpin profiling equal-length positioning and rotary wire breaking mechanism and a hairpin profiling forming and automatic blanking mechanism are sequentially installed in the advancing direction of a flat wire. Automatic feeding, automatic straightening, automatic paint removing, chamfering, rotary wire breaking, forming and discharging of the flat wire are achieved, damage to the flat wire is small, the hairpin profiling length and shape of the flat wire are consistent, and the machining efficiency and quality of the flat wire are improved.

The invention relates to a bearing preloading device for an electric motor. The bearing preloading device comprises a motor shaft, a bearing outer cover, an end cover, a bearing and a bearing inner cover, wherein the bearing inner cover is mounted on the motor shaft; the bearing supports the motor shaft; the end cover is fixed on an outer ring of the bearing; the bearing outer cover is mounted in the end cover; and the bearing outer cover and the bearing inner cover are connected and fixed by using hexagon bolts. The bearing preloading device is characterized by further comprising bearing springs and a bearing gasket; four bearing springs are mounted on the bearing outer cover of the motor; the bearing gasket is mounted on the outer side of the bearing; and the bearing springs are contacted with the bearing gasket. According to the bearing preloading device, the structure is simple and reasonable, the assembly is convenient, few parts exist, and on the basis that any assembling manner of an original electric motor is not changed, four circular holes used for installing the bearing springs are formed in the bearing outer cover, so that the preloading function for the bearing of the electric motor can be realized more conveniently.

The invention discloses an underwater electromechanical release device driven by a two-stage force-amplifier. The underwater electromechanical release device is characterized in that when the underwater electromechanical release device works, a power source drives a worm wheel to rotate through a worm, the worm wheel drives a nut shaft to rotate through key connection, the nut shaft pushes a plugsleeve fixed on a shoulder joint of a mechanical arm to move downwards through a threaded pair inside the nut shaft, meanwhile, a socket sleeve is driven to slide downwards in a sealing sleeve, the nut shaft loses the suspension constraint on the plug sleeve when the plug sleeve moves to the end of the threaded pair, meanwhile, the plug sleeve and the sealing sleeve are unsealed, the mechanical arm is separated from an underwater robot under the action of gravity, and electromechanical release is completed. According to the underwater electromechanical release device, a worm wheel and worm pair and a lead screw and nut pair are connected in series to achieve two-stage force amplifying and self-locking, the release action required smaller power, and the self-locking connection is reliable;and the underwater electromechanical release device is suitable for underwater operation robots and can also be applied to other underwater electromechanical equipment.

The invention discloses a punching device for paper processing based on a rolling wheel pre-pressing technology. The device comprises a base, a punched hole and a vertical frame are arranged in the middle of the top end surface of the base, and the vertical frame is arranged on the back side of the punched hole; a hydraulic cylinder is arranged at the top end of the vertical frame, the bottom endof a telescopic rod on the hydraulic cylinder penetrates through the top wall of the vertical frame and is fixedly connected with a punching head cooperating with the punched hole, and the telescopicrod is slidably connected with the vertical frame; connecting rods are symmetrically arranged at the bottoms of the left and right side ends of the vertical frame, telescopic sleeves are arranged at the bottom ends of the connecting rods, and telescopic rods are sleeved with inner cavities of the telescopic sleeves; pressing plates cooperating with the base are fixedly connected to the bottom endsof the telescopic rods, and several pressing wheels are uniformly arranged at the bottom ends of the pressing plates; by arranging the pressing plates and the pressing wheels, pre-pressing can be conducted on paper boards, the punching head can cooperate with the punched hole, the paper boards can be punched, and the punching quality of products can be effectively ensured; by arranging a suctionfan, paper scraps in the punched hole can be timely discharged, and it is effectively avoided that due to the fact that the paper scraps block the punched hole, the processing work is influenced.

The invention relates to a hydraulic rotary power device and belongs to the technical field of anchor rod detection torque loading devices. The invention aims to provide the hydraulic rotary power device which is stable, safe and reliable in running and can output the double power. The technical scheme provided by the hydraulic rotary power device is that a first machine head bracket and a second machine head bracket are arranged above the two ends of a first machine head bottom plate; a first hollow high-speed shaft of a high-speed motor is sleeved on the first machine head bracket and the second machine head bracket; the high-speed motor is fixed on the first machine head bracket; a first torque sensor is sleeved on the first hollow high-speed shaft; a low-speed motor is sleeved on the first hollow high-speed shaft through a first low-speed shaft; the first torque sensor and the low-speed motor are positioned between the first machine head bracket and the second machine head bracket; the first torque sensor is fixed on the first machine head bracket; and one end of the low-speed motor is connected with and fixed with the first torque sensor through a third flange. The hydraulic rotary power device is mainly used for detecting the uploading of rotating power of an anchor rod.