31results about How to "Change stretch length" patented technology

The invention discloses a crane sling electricity-generating system, a crane sling and a crane. The crane sling electricity-generating system comprises a movable pulley, a generator and a storage battery, wherein the movable pulley is arranged on a crane sling frame and is connected with a fixed pulley block on a crane jib through a wirerope; during rotation, the movable pulley can drive a rotor shaft of the generator to rotate; an output end of a generator circuit is connected with the storage battery through a connection device; and when the sling moves down, the connection device ensures that the generator charges the storage battery. The crane sling electricity-generating system can make full use of the kinetic energy of the movable pulley to generate electric energy; the generated electric energy can be used to drive a telescopic mechanism and a rotary mechanism of the sling, and can also be used in other aspects of the crane so as to reduce oil consumption of the crane; meanwhile, hydraulic oil pollution can be reduced and environmental protection performance of the crane can be improved; in addition, the layout of a crane feeding circuit is simplified to optimize the service performance of the crane.

The invention relates to a three-degree-of-freedom self-walking minitype shield machine comprising a cutting head, a drive motor, a propelling oil cylinder, a supporting oil cylinder, a spiral conveyer, an inner support frame, an outer support frame, a hydraulic valve bank and a shield. In the invention, the cutting head adopts pick-shaped teeth cutting and realizes three-degree-of-freedom rotary cutting through an adjusting oil cylinder; a rock crush principle is as follows: coal rocks are subjected to crushing treatment through the pick-shaped teeth cutting and a secondary crushing mechanism by adopting a secondary crushing technology; a propelling system adopts two double-acting oil cylinders, a supporting and obstructing system adopts cross type double-acting oil cylinders, and rear support-front propelling and front support-rear contraction type stepping walking is realized through the control of a hydraulic system; a deslagging mode is as follows: slag and muddy water are conveyed into a conveying pipe by adopting the spiral conveyer, and deslagging is carried out by combining with negative pressure suction. According to the invention, the directional control and the large curvature radius curve walking of the three-degree-of-freedom self-walking minitype shield machine disclosed by the invention are realized; the slant stagger of a drill hole is prevented; the autonomous walking of the three-degree-of-freedom self-walking minitype shield machine is realized; long-distance hole drilling is ensured; and the problem of difficult deslagging of a pipe jacking technology is solved, and therefore, the gas is more sufficiently discharged.

The invention discloses a special oral mirror for medical treatment of a stomatology department. The oral mirror comprises a fixing cylinder, a screw is installed inside the fixing cylinder, a drivengear is installed in the middle of the right end of the screw, a driving gear is meshed with the lower end of the driven gear, a driving shaft is installed in the middle of the lower end of the driving gear, a moving column is mounted on the left end of the screw, a guiding sleeve sleeves the outer side of the moving column, a buffer spring sleeves the outer side of the screw between the right endof the guiding sleeve and the moving column, a fixing ball is connected to the left end of the moving column, grooves are uniformly formed in the inner side of the fixing ball, a rotating ball is installed inside the fixing ball, and the middle of the left end of the rotating ball is connected with a rotating rod. According to the oral mirror, through the mutual cooperation between the moving column and the screw, the change of the telescopic length of the oral mirror is achieved; through the mutual cooperation between the fixing ball and the rotating ball, the adjustment of the rotation angle of the oral mirror is achieved, the operation is simple, the reliability is high, the needs of medical workers for observing internal pathological tissues of patient mouths are satisfied, and the practicability is strong.

The invention discloses a stirring radius variable chlorination reaction kettle which comprises a kettle body, wherein a stirring shaft is arranged in the kettle body; a plurality of shaft sleeves are arranged on the stirring shaft; casings are arranged on the two sides of the shaft sleeves; flanges are arranged at openings of the casings; extension rods are arranged in the casings in a sliding manner; one side, facing each shaft sleeve, of each extension rod is connected with each shaft sleeve via a spring; one side of the lower end of the kettle body is communicated with a discharge pipe; the tail end of the discharge pipe is connected with a filter; a filtration outlet of the filter is connected with a settling barrel; a side wall, close to the bottom end, of the settling barrel is communicated with a finished product discharge pipe; pipelines are arranged on the outer side of the kettle body and fixedly connected with the kettle body via connecting pieces; the pipelines are communicated with the interior of the kettle body via a plurality of spray pipes. The kettle is simple in structure and reasonable in design; a stirring radius of a stirring blade can be adjusted conveniently; the practicability is improved; at the same time, discharged materials are subjected to filtration and settling treatment, so that the discharged materials are better in quality.

The invention discloses a six-bar mechanism multi-foot robot and a modeling method thereof. The six-bar mechanism multi-foot robot comprises a control device, bevel gear speed reducers and left-rightsymmetrical leg mechanisms, wherein the control device is composed of a power supply, a controller internally provided with a direct-current motor control board, a direct-current motor A and a direct-current motor B, and the output shafts of the direct-current motor A and the direct-current motor B are correspondingly connected to the bevel gear speed reducers; and each leg mechanism consists of shell plates, a gear transmission assembly A, a gear transmission assembly B, a six-bar mechanism and a foot claw assembly, and in the case of each leg mechanism, the gear transmission assembly A is mounted between the two shell plates, and the gear transmission assembly B is mounted between the other two shell plates, and both the gear transmission assembly A and the gear transmission assembly B drive the foot claw assembly through the six-bar mechanism. According to the six-bar mechanism multi-foot robot and the modeling method thereof, the two leg mechanisms are driven by the two direct-current motors, the six-bar mechanisms push eight foot claws of front and rear groups to move in a staggered mode, so that walking of the robot is achieved through the staggered movement of the adjacent six-bar mechanisms; and assembling of the robot is compact, thus meeting the requirements of narrow-space operation.

The invention provides a heat radiating module which comprises a locking device, a heat radiator and a mainboard. The heat radiator comprises a baseboard, a penetrating hole is formed in the baseboard, a fixing hole is formed in the mainboard, the locking device comprises a buckling rod, an elastic element and a nut, the buckling rod comprises a column, a threaded portion formed by extending from the top end of the column, and a buckling portion formed by extending from the bottom of the column, the buckling portion comprises two retaining hooks which are opposite, the nut comprises a stud, a threaded hole is formed in one end of the stud, the elastic element sleeves the column, an internal thread of the nut and the threaded portion of the buckling rod are in screwed fit, the buckling portion of the buckling rod penetrates the penetrating hole of the baseboard and the fixing hole of the mainboard, the retaining hooks are retained to the mainboard, and the top end of the elastic element is connected to the stud of the nut in an abutted manner while the bottom end of the same is connected to the baseboard of the heat radiator in an abutted manner. The invention further provides the locking device. Compared with the prior art, the locking device of the heat radiating module has the advantage that the nut is rotated to change extending and contracting length of the elastic element so as to change buckling force.

The invention relates to a washing device for the inner wall of a water-coal-slurry pipe. The washing device comprises a front stator, a support column and a rear stator, wherein one end of the support column is fixedly connected with one end of the front stator, and the other end of the support column is fixedly connected with one end of the rear stator; a washing head is arranged at the other end of the front stator, and at least three groups of first support legs are uniformly distributed on the peripheral surface of the front stator; an adapter is arranged at the other end of the rear stator, and at least three groups of second support legs are uniformly distributed on the peripheral surface of the rear stator; the washing head is connected with the adapter through a guide pipe; a roller and a second motor driving the roller are arranged at the bottom ends of each group of second support legs; and the washing head comprises a shaft, a disc, a rubber leaf and a piston rod. The washing device for the inner wall of the water-coal-slurry pipe has the advantages that the front stator uniformly provided with at least three rollers and the rear stator uniformly provided with at least three driving rollers are arranged at the two ends of the support column, so that the washing device, free of rail devices in the prior art, can more flexibly walk.

The invention discloses an iron-gallium alloy converse magnetostriction actuator driven by a rotating motor. The iron-gallium alloy converse magnetostriction actuator comprises the rotating motor and an iron-gallium alloy converse magnetostriction actuator body. The iron-gallium alloy converse magnetostriction actuator body comprises an upper magnetic-conducting iron core (1), a lower magnetic-conducting iron core (3) and a rotor iron core (6). A gap is formed between the upper magnetic-conducting iron core (1) and the lower magnetic-conducting iron core (3) and internally provided with a permanent magnet (4) and iron-gallium alloy (5) parallel to the permanent magnet (4). The iron-gallium alloy (5) penetrates through the upper magnetic-conducting iron core (1). The rotor iron core (6) which is in clearance fit with the gap is arranged at the position, corresponding to the gap between the upper magnetic-conducting iron core (1) and the lower magnetic-conducting iron core (3), of an output shaft of the rotating motor.

The invention discloses supporting equipment for bridge construction in the field of bridge engineering, and the supporting equipment comprises a supporting square column, the bottom end of the supporting square column is fixedly connected with a cross-shaped base, the top of an inner cavity of the supporting square column is rotatably connected with a threaded sleeve through a bearing, and the threaded sleeve is internally in threaded connection with a lead screw; the bottom end of the lead screw is fixedly connected with a moving square block, the moving square block is arranged in the supporting square column in a sliding mode, and the top of one side of the supporting square column is fixedly connected with a motor through a mounting base. Meanwhile, pedestrians can be blocked, the pedestrians can be far away from the device, objects falling from high altitudes are prevented from hurting people, the overall protection performance of the device is improved, meanwhile, falling sundries during bridge construction can be effectively blocked through a blocking mechanism, a protection mechanism below is prevented from being damaged, meanwhile, the situation that people are injured by falling objects can be further reduced, and the functionality of the device is improved.

The invention discloses a portable folding automobile handrail. The portable folding automobile handrail comprises a U-shaped mounting plate and a connecting seat; side walls of the connecting seat and the U-shaped mounting plate are in contact connection with each other; a circular groove is formed in the side wall of the connecting seat; a cylinder is fixedly connected to the side wall of the U-shaped mounting plate; one end, far away from the U-shaped mounting plate, of the cylinder is rotationally connected to the interior of the circular groove; a plurality of fixing mechanisms are arranged on the side wall, far away from the U-shaped mounting plate, of the connecting seat; a threaded rod is rotationally connected to the inner wall of an outrigger of the U-shaped mounting plate; one end, far away from the outrigger of the U-shaped mounting plate, of the threaded rod runs through the outrigger on the other side and is fixedly connected with a rotating knob; a first thread and a second thread are arranged on the threaded rod; and the thread rotation directions of the first thread and the second thread are reverse to each other. According to the portable folding automobile handrail, a supporting effect on the left arm of a driver can be realized and aches of the left arm caused by long-time hanging can be effectively relieved.

The invention discloses a spring with a limiting structure and a using method thereof. The spring comprises a base plate, an adjusting assembly, a positioning sleeve, a supporting rod, an adjusting lead screw, a main pipe and a second hand wheel, the adjusting assembly is arranged at the bottom of the base plate, the positioning sleeve is fixedly connected to the top of the base plate, the supporting rod is fixedly connected to the center of the bottom of the inner wall of the positioning sleeve, and the supporting rod is slidably sleeved with the main pipe; and the spring is compact in structure, easy and convenient to operate and high in practicability, the position of a mounting plate can be adjusted through the adjusting assembly, and therefore the spring can be selectively mounted according to use requirements, clamping can be achieved, threaded connection can also be achieved, the use flexibility of the spring is improved, the adjusting lead screw can be driven to rotate throughthe second hand wheel, so that the total length of the adjusting main pipe and the supporting rod is adjusted, the extension length of the spring can be changed at the moment, the elasticity of the spring can be changed, the spring can be limited, and the actual use effect of the spring is improved.

The invention discloses a bridge construction supporting method which is characterized by comprising the following steps: S1, pre-adjustment before supporting: a supporting device is moved to a position needing to be supported in advance, then a motor is started, and the motor drives a supporting seat to quickly ascend until the bottom of an inner cavity of the supporting seat is in contact with I-shaped steel at the bottom of a steel frame bridge; s2, fixing between the supporting device and the bridge: starting an air pump, quickly pumping out air in a cavity, keeping a vacuum state, quickly and tightly sucking the bottom of the inner cavity of the supporting seat and I-shaped steel at the bottom of the steel-framed bridge, then moving a reinforcing plate towards the inner side until the reinforcing plate is in contact with the I-shaped steel, and finally rotating a locking bolt to fix the supporting device and the bridge. The I-shaped steel is rotated and moved downwards under the assistance of the nut, so that the sliding seat is limited, and the I-shaped steel is secondarily fixed; s3, protection work is carried out; and S4, protecting the protection mechanism.

The invention discloses a hydraulic braking system of a railway vehicle. The system comprises a brake frame, a variable-frequency pusher, a brake arm, a manual brake mechanism, a tie rod, a brake huband a brake mechanism, wherein the brake hub is arranged at the bottom of the outer side of a hub, and the brake mechanism is installed on the inner side of the brake hub; the brake arm is installed on the brake hub, the top end of the brake arm is installed on the manual brake mechanism, and the bottom end of the brake arm is installed on the brake frame; the variable-frequency pusher and the tierod are arranged between the brake frame and the manual brake mechanism respectively; the two ends of the variable-frequency pusher and the two ends of the tie rod are arranged on the brake frame andthe manual brake mechanism respectively. The system has the advantages that the brake mechanism is installed, the angle does not need to be adjusted, long-time brake locking and power supply fault electric locking functions are added, detachment and installation are convenient, and abrasion compensation and abrasion limit faults of the brake mechanism are prompted.