42results about How to "Large telescopic stroke" patented technology

The invention discloses a T-shaped beam casting special mold and a using method thereof, and relates to the technical field of T-shaped beam manufacturing. The T-shaped beam casting special die comprises a guide rail, wherein a walking trolley is arranged on the sliding rail in a sliding mode, a left mold and a right mold are symmetrically arranged on the walking trolley, the left mold comprises frames and panels connected to the inner side of the frames, the walking trolley is provided with mold guide devices which are positioned at the outer side ends of the two frames and provided with high-stroke spaces, the outer side ends of the two frames are provided with overturning type demolding mechanisms, an automatic slope adjusting mechanism and a locking mechanism are arranged on each frame, the tops of the automatic slope adjusting mechanisms and the tops of the locking mechanisms are hinged to the bottom of rotatable parts of the panels, combined adjusting mechanisms for adjusting theheight of the left mold and the bottom of the right mold are arranged at the bottom of the left mold and the bottom of the right mold, and supporting columns which are convenient to assemble and disassemble are arranged on the outer sides of the tops of the two frames, and during use, the supporting columns are subjected to mold closing and grouting, demoulding. The T-shaped beam casting specialmold has the advantages of being complete in function and good in T-shaped beam forming quality.

The invention belongs to the technical field of an underground coal mine short-wall exploitation device, and particularly relates to a single-arm onboard roof bolter for an underground coal mine, which solves the problems of the existing anchor support device. The single-arm onboard roof bolter comprises a rotating base, a cantilever, an operating platform assembly, a drilling arm rotating device and a drill frame, wherein the movable rotating base capable of rotating horizontally is a base for connecting the single-arm onboard roof bolter and equipment, the cantilever is supported on the rotating base, the cantilever is of an inner-outer sleeve structure, one end of the cantilever is connected with the rotating base through a horizontal hinge shaft, the other end of the cantilever is hinged to the operating platform assembly, the drill arm rotating device is installed on the front end of the operating platform assembly, and the drill frame can be installed on the front end of the operating platform assembly in a rotating manner. The single-arm onboard roof bolter is used for supporting other coal mine equipment mining machinery, roadway repairing machinery and the like, can move back and forth on a track provided by the equipment by adopting the hydraulic oil as a power source, has multiple degrees of freedom such as extension, rotation and the like and can realize the anchor installation construction of a whole section.

The embodiment of the invention provides an electromechanical actuator and a control method thereof, and belongs to the technical field of electromechanical servo. The actuator comprises a first motorassembly, a second motor assembly, a first actuating rod and a second actuating rod, wherein the first actuating rod is driven by the first motor assembly, the second actuating rod is driven by the second motor assembly, the first actuating rod is of a hollow structure, the first actuating rod and the second actuating rod move relative to each other under driving of the first motor assembly and/or the second motor assembly, and the second actuating rod partially moves in a cavity of the first actuating rod. By the actuator, dual-redundancy control can be achieved, a normal working mode and abackup working mode can be set, and switching between the working modes is performed according to a special fault; and compared with a hydraulic servo system and an electromechanical hydrostatic servosystem, the actuator has the advantages that the actuator has more flexible and reliable redundancy management mode, and the problem of a fault caused by a roller or a ball screw which is stucken isprevented.

The invention discloses a seat type longitudinal bobbin winder. A base is mounted at one side of a shell and a rocker arm is arranged at the other side of the shell; an input gear is mounted at the inner end of the rocker arm; the input gear is engaged with a first-grade small gear; a first-grade large gear which is coaxial with the first-grade small gear is engaged with a second-grade small gear; a transition bevel gear is further arranged on a shaft of the second-grade small gear; the transition bevel gear is engaged with an output bevel gear; a cantilever arranged in front of the shell is fixed on the output bevel gear; the input gear is connected with a rear end of a push rod to form a crank connecting rod mechanism; a front end of the push rod penetrates through the output bevel gear; a bobbin sleeves the front end of the push rod; and the bobbin is located beside the cantilever. The seat type longitudinal bobbin winder is simple and compact in structure, easy to assemble, small in size and convenient to pack and carry; the bobbin has a high rotary speed and is convenient for pay-off and take-up; a retractable route of the push rod is large and a plurality of threads can be wound; and disordered thread winding does not occur and the flexibility and reliability of the running of a w hole device can be ensured.

The invention discloses a suspended multi-telescopic hydraulic column, wherein, an oil cylinder (8) is arranged in a base (11); the lower part of a middle cylinder (6) is arranged in the oil cylinder (8); the lower part of an internal cylinder (4) is arranged in the middle cylinder (6); a first cylinder sleeve (2) is arranged outside the internal cylinder (4) at an outlet of the upper end of the middle cylinder (6); the lower part of a movable column (3) is arranged in the internal cylinder (4); a second cylinder sleeve (5) is arranged outside the movable column (3) at an outlet of the upper end of the internal cylinder (4); the top end of the movable column (3) is provided with a top cover (1); a return spring (10) is arranged in the movable column (3), and two ends of the return spring (10) are respectively connected with the top cover (1) and the base (11); and a valve body (7) is arranged outside the middle cylinder (6) at an outlet of the upper end of the oil cylinder (8). The suspended multi-telescopic hydraulic column has the advantages of long operating stroke, high strength, good stability, strong bearing capacity and wide practicability.

The invention discloses a lifting arm. The lifting arm comprises: a basic arm, wherein a first accommodation chamber is arranged in the basic arm; a first boom, wherein the first boom is arranged and capable of moving back and forth in the first accommodation chamber, a second accommodation chamber is arranged in the first boom, walls of the second accommodation chamber are provided with a plurality of installing holes, and each installing hole is rotatably provided with a first pulley; a second boom, wherein the second boom is arranged and capable of moving back and forth in the second accommodation chamber and is rotatably provided with second pulleys, and the second pulleys and the first pulleys are arranged at a preset interval along a direction from front to back; an actuator which is fixed on the basic arm and connected with the first boom to drive the first boom to move back and forth; and a steel wire rope, wherein a first end of the steel wire rope is fixed on the basic arm, and a second end of the steel wire rope winds around the first pulleys and the second pulleys and is then fixed on the basic arm to drive the second boom to move back and forth. According to embodiments provided by the invention, the lifting arm is telescoping under the condition of load and has strong load telescoping capability.

The invention provides a two-way multiplier telescopic ferry vehicle, which includes a vehicle frame and a motor reducer, the motor reducer drives double output shafts, and the double output shafts are connected to axles through couplings, wheels are arranged on the axles, and the upper part of the frame A telescopic device frame is provided, a gearbox slider is arranged above the telescopic device frame, and a telescopic arm is arranged on the gear box slider, and a drive gear set is provided at the lower end of the middle position of the telescopic device frame, and the drive gear set drives the gearbox slider. The sliding block of the gear box is provided with a telescopic gear set, and the telescopic gear set drives the telescopic arm, and the telescopic arm is provided with a drying car lock hook device. The invention has a long telescopic stroke, can complete the material transfer from one side to the other at one time without adjusting the direction of the two-way transfer perpendicular to the moving direction of the vehicle, has a compact structure, relatively small volume and reliable operation, and can greatly save space or space and manpower. Suitable for use in brick drying rooms.

The invention relates to a disc plane module which comprises a plane whose front has an inscribed board, wherein the back of the inscribed board attaches an elastic pad; it extents a plurality of slide rods from the plane back; a guiding seat with the groove hole is fixed on the plane back; a torsion spring is fixed in the groove hole; a base arranges a plurality of slide holes; at least one line groove is positioned on the base; the edge of the torsion spring can inset into the line groove to add the flexible traveling of the disc plane module.

The invention relates to an abacus, and in particular relates to a distance-adjustable telescopic abacus. By utilizing the instability of a parallelogram of the abacus, a plurality of isometric middle connecting rods are connected in sequence through hinge pins in a hinged manner; a handle is held firstly, and subsequently a left-handed screw rod and a right-handed screw rod are driven to rotate by rotating a rolling hand wheel; as a left-handed nut and a right-handed nut are respectively fixedly connected with a left-handed nut hinge pin and a right-handed nut hinge pin, the left-handed nut and the right-handed nut sleeving the left-handed screw rod and the right-handed screw rod can only move inwards or outwards simultaneously but not rotating, the abacus is driven by an upper tail end connecting rod and a lower tail end connecting rod to unfold and withdraw, the distance of two adjacent rows of abacus beads can be conveniently adjusted in an equal distance manner, the requirements of people of different ages in different use situations can be met, the plane with the abacus beads is positioned at the front end of the plane formed by a middle connecting rod; and as the abacus beads have certain height gaps, the abacus is convenient to use, can be unfolded or withdrawn to expected distance according to demands when being used, and is convenient to fold and carry over.

The invention provides a formation testing probe comprising a probe base body, a filter cartridge and a setting assembly. The probe base body comprises a fixing bush, a hydraulic pipeline and a fluidpipeline; the filter cartridge is arranged outside the fluid pipeline in a sleeving mode and comprises a sampling opening; the setting assembly comprises a packing bush, a pushing-abutting sleeve, a pushing-abutting seat and a setting body; the packing bush is arranged in the fixing bush in a sleeved mode and can slide relative to the fixing bush; the pushing-abutting sleeve is arranged in the packing bush in a sleeved mode and can slide relative to the packing bush; and the pushing-abutting sleeve is fixedly connected with the setting body through the pushing-abutting seat, and the setting body is located on the inner side of the packing bush. The formation testing probe can be applied to the technical field of downhole drilling, and the packing protecting effect on the setting body is achieved by arranging the setting body, so that slurry scouring force applied to the joint of the setting body and the pushing-abutting seat and the scouring area are decreased; the problem that a setting body is prone to falling off, and consequently setting fails is solved; and the formation testing probe has the advantages that setting performance is good, setting reliability is high, and the service life of the setting body is long.

The invention relates to the technical field of medical instruments, in particular to a novel convenient oral cavity treatment device which comprises an upper tooth socket, a lower tooth socket, a telescopic part, an elastic part and a locking mechanism. One side of the upper tooth socket is provided with an upper tooth cavity, and one side of the lower tooth socket is provided with a lower toothcavity; one ends of the upper tooth socket and the lower tooth socket are rotationally connected; the telescopic piece is arranged between the upper tooth socket and the lower tooth socket, one end isconnected with the upper tooth socket, and the other end is connected with the lower tooth socket; the elastic piece is used for providing a relative opening force for the upper tooth socket and thelower tooth socket; the locking mechanism is used for locking the telescopic piece so as to position the telescopic position of the telescopic piece; and unlocking the telescopic part so as to releasethe telescopic limitation on the telescopic part. According to the scheme, the novel convenient oral cavity treatment device can be used during treatment radiation and rehabilitation training, components do not need to be disassembled and assembled on the novel convenient oral cavity treatment device during switching between radiation treatment and rehabilitation training, and use is more convenient.

The invention relates to the technical field of medical instruments, in particular to an oral rehabilitation therapeutic apparatus. The oral rehabilitation therapeutic apparatus comprises an upper tooth socket, a lower tooth socket, a telescopic part, an elastic part and a locking mechanism, wherein an upper tooth socket is formed in one side of the upper tooth socket, and a lower tooth socket isformed in one side of the lower tooth socket; one end of the upper tooth socket and one end of the lower tooth socket are rotationally connected; the telescopic part is arranged between the upper tooth socket and the lower tooth socket, one end of the telescopic part is connected with the upper tooth socket, and the other end of the telescopic part is connected with the lower tooth socket; the elastic part is used for providing force for relative opening of the upper tooth socket and the lower tooth socket; and the locking mechanism is used for locking the telescopic part so as to position thetelescopic position of the telescopic part and unlocking the telescopic part so as to relieve telescopic limitation on the telescopic part. According to the scheme, the oral rehabilitation therapeutic apparatus can be used during radiotherapy and can also be used during rehabilitation training, when the radiotherapy and the rehabilitation training are switched for use, components do not need to be disassembled from or assembled on the oral rehabilitation therapeutic apparatus, and use is more convenient.

The invention discloses a lorry-mounted crane, and belongs to the field of lorry-mounted cranes. A base is designed by adopting a low and flat structure; a positioning mechanism of an amplitude variation movable arm is arranged right below the amplitude variation movable arm; a telescopic oil cylinder is arranged in a telescopic arm, so that the height of the whole crane is lowered effectively, and the stability of the whole crane is improved; a height warning label and an angle indicator are arranged at two sides of the amplitude variation movable arm, and provide reference and help for operators. The adopted technical scheme is that the lorry-mounted crane comprises the base, the amplitude variation movable arm and a lifting arm; the rear end of the amplitude variation movable arm is hinged with the base; the front end of the amplitude variation movable arm is connected with the lifting arm; the base comprises a slewing mechanism and a support frame; the upper end of the support frame is hinged with the amplitude variation movable arm; the lower end of the support frame is connected with the slewing mechanism. The technical scheme can be widely applied to the field of lorry-mounted cranes.

The invention provides a mechanical arm capable of stretching out and drawing back in a multiplied-speed movement manner, and a cleaning robot. According to the mechanical arm, a driving assembly is arranged on a mounting seat, and a first section of a screw rod is arranged on the driving assembly; the mounting seat and the first section of the screw rod are arranged on a first section of a base, and the first section of the base is arranged on a first section of an arm; the first section of the arm and the first section of the screw rod are arranged on a first section of nut seat; a second section of the arm and the first section of the nut seat are arranged on a second section of the base, and the second section of the base is arranged on the second section of the arm; a second section of the screw rod is arranged on the second section of the base, and the first section of the screw rod is connected with the second section of the screw rod in a sliding manner; the second section of the arm is provided with a second section of the nut seat, and the second section of the screw rod is arranged on the second section of nut seat; and a third section of the arm is provided with a third section of the base, the second section of the nut seat is arranged on the third section of the base, and the third section of the base is arranged on the second section of the arm. The mechanical arm has the advantages of large telescopic stroke, small volume in a telescopic state, small occupied space, high working efficiency, simple structure and low cost.