40results about How to "To achieve the purpose of stretching" patented technology

A telescopic stretcher, including two longitudinal rods and a plurality of connecting horizontal rods connecting the two longitudinal rods, the longitudinal rods are composed of nested outer hollow tubes and inner hollow tubes, and the inner hollow tubes of the two longitudinal rods are symmetrical It is arranged at the same end of the stretcher, and a through groove cooperating with the end of the connecting cross bar is arranged on the inner hollow tube along its axial direction, and a compression spring is arranged in the through groove, which is located in the through groove, and the adjacent two The root connecting cross bars are connected by compression springs. A horizontal section is arranged in the middle of the connecting cross bar, and the two ends of the horizontal section are bent upwards, and are matched and connected with corresponding parts of the two vertical bars respectively. In the present invention, since the through groove is arranged inside the inner hollow tube and the compression spring is arranged in the inner hollow tube, when the inner hollow tube of the stretcher retracts toward the outer hollow tube, the connecting cross bar can also shrink backwards with the compression of the compression spring , while avoiding the interference caused by fixing the connecting cross bar, finally the purpose of stretching the stretcher can be realized without reducing the connecting cross bar.

The invention discloses a remote-control video display bench for teaching. The display bench comprises a base with a backlight plate. An LCD video monitor and a control bench with a built-in rechargeable power supply are arranged on the base. The LCD video monitor is connected with the control bench. An infrared receiving device is arranged on the control bench and is connected with an infrared remote controller. A desk light neck which can be twisted and bent is fixed on the top of the control bench and a machine head is fixed to the desk light neck. A CCD lens is disposed on the end of the machine head. Light supplement lamps with desk light necks are arranged on two sides of the control bench. The display bench uses the desk light necks to replace complex mechanical structures for stretching and retracting, so that the bench is simpler than other similar products in structure. Besides, the display bench is provided with the built-in rechargeable power supply, so that no long connection line is needed during teaching, and thereby usage in teaching is greatly facilitated.

The invention discloses a coaxial cable tension test method. The two ends of a to-be-detected cable body are wound on the surfaces of mounting shafts on the two sides respectively; and a first sliding nut on the surface of the first rotating screw rod drives an adjusting rod to move relatively, so that the upper side of the adjusting rod drives adjusting gears to move oppositely, the distance between the adjusting gears is changed, and the purpose of stretching the cable body is achieved. A second driving motor is started, a second transmission rod rotates through a crawler belt and a first mounting rod, so that the first mounting rod drives a cable body to move through a mounting shaft, the position needing to be stretched is changed, the stretching part of the cable body can be adjusted according to requirements during testing, time and labor are saved, and therefore, the stretching efficiency of the cable body is improved during the test.

The invention discloses a portable video demonstration stand for teaching, which comprises a base provided with a backlight board, where an LCD video monitor and a console are arranged on the base, the console is provided with a built-in rechargeable power source, and the LCD video monitor is connected with the console; a table lamp neck which is capable of torsional bending is fixed on the console, the table lamp neck is provided with a machine head in a fixed manner through a bracket, and the end part of the machine head is provided with a CCD lens; and both sides of the console are each provided with a light supplementary lamp provided with a table lamp neck. The portable video demonstration stand for teaching adopts the table lamp necks, achieves the telescopic purpose by replacing the complicated mechanical structure with the table lamp necks, and is simpler in structure when compared with other similar products; and the portable video demonstration stand is provided with the built-in rechargeable power source, thus the portable video demonstration stand does not need to be connected with a long wire in teaching, thereby greatly facilitating the usage in teaching.

The invention discloses an electrical equipment hanging support convenient to use. The electrical equipment hanging support comprises a fixing box. A supporting column penetrates the top of the fixingbox, the end, located outside the fixing box, of the supporting column is fixedly connected with a top box, and a clamping device is fixedly connected to the left side of the inner wall of the fixingbox and comprising a fixing frame; and a connecting plate is fixedly connected to the left side of the inner wall of the fixing frame, a rail frame is fixedly connected to the bottom of the connecting plate, a first movable rod is connected to the inner wall of the rail frame in a sliding manner, and the bottom end of the first movable rod penetrates the fixing frame and extends to the exterior of the fixing frame. The electrical equipment hanging support relates to the technical field of electrical equipment. By means of the electrical equipment hanging support convenient to use, adjustmentof the position of the electrical equipment after the electrical equipment is fixed is facilitated, the application scope of the electrical equipment is enlarged, the working amount of workers in theelectrical equipment adjusting process is reduced, and excursion of the right working angle of the electrical equipment due to vibration is avoided.

The invention discloses a bulletin device capable of adjusting rotary angle conveniently, and relates to the technical field of bulletin devices. The device comprises a base, a first fixing groove isformed in the middle of the top of the base, the first fixing groove is internally provided with a rotary shaft and a motor, the rotary shaft and the motor are movably connected, the motor and the first fixing groove are fixedly connected, the bottom of the rotary shaft is fixedly connected with a variable speed gear, the top of the rotary shaft is fixedly connected with a bulletin board, the topedge of the base is provided with a sliding groove, a supporting seat and a fixing plate are arranged in the sliding groove, and the supporting seat is U-shaped. The bulletin device has the advantagesthat the bulletin board can be driven to rotate through the cooperation of the rotary shaft, the motor and the variable speed gear, the effect of rotary angle adjusting of the bulletin board is achieved, the bulletin effect is improved, the supporting effect of the bulletin board is achieved through the cooperative arrangement among the supporting seat, the fixing plate and the supporting rod, and the stability of the device is improved.

The invention discloses a portable video display bench for teaching. The bench comprises a base with a backlight plate. A control bench with a built-in rechargeable power supply is disposed on the base. A desk light neck which can be twisted and bent is fixed on the control bench. A machine head is fixed with the desk light neck through a support. A CCD lens is arranged on an end of the machine head. Light supplement lamps with desk light necks are arranged on two sides of the control bench. The bench uses the desk light necks to replace complex mechanical structures for stretching and retracting, so that the bench is simpler than other similar products in structure. Besides, the bench is provided with the built-in rechargeable power supply, so that no long connection line is needed during teaching, and thereby usage in teaching is greatly facilitated.

The invention discloses a jib system and a telescopic oil cylinder thereof. The disclosed jib system comprises a cylinder jacket (21), a first piston rod (22), a second piston rod (23) and a core pipe (24) for conveying hydraulic oil into the telescopic oil cylinder. The cylinder jacket (21) comprises a first chamber which is sleeved on the first piston rod (22); the first piston rod (22) comprises a second chamber which is sleeved on the second piston rod (23); the second piston rod (23) comprises a third chamber which is sleeved on the core pipe (24); the first piston rod (22) further comprises a first channel (221) which is communicated with the first chamber and the third chamber; and the second piston rod (23) further comprises a second channel (231) which is communicated with the second chamber and the third chamber. The telescopic oil cylinder is simple in structure, and is easy to process; the assembling difficulty and the production cost of the oil cylinder are lowered effectively; convenience of the engineering design is provided; and the economical applicability of engineering vehicles with the jib system is improved.

The invention discloses a telescoping mechanical mining platform with a large load bearing capacity. The telescoping mechanical mining platform comprises a platform body, wherein an aggravated load and a fastening nail are arranged at one end of the platform body, an upright fixed plate is connected to the other end of the platform body, a connecting pin is arranged on the upright fixed plate, and a plurality of triangular cone teeth are arranged on the bottom surface of the platform body; a sliding slot is formed in the platform body, a telescoping plate is arranged in the sliding slot, a projection is arranged under the telescoping plate, and the projection is connected with a first telescoping air cylinder arranged below the platform body; a supporting column is arranged at the tail end of the telescoping plate, a pulley is arranged at the lower end of the supporting column, the pulley is placed on a bearing plate, and one end of the bearing plate is connected with the upright fixed plate through the connecting pin; a second telescoping air cylinder is arranged between the bearing plate and the platform body, the free end of the second telescoping air cylinder is fixed to the middle of the bearing plate, and the fixed end of the second telescoping air cylinder is fixed to one end of the platform body. The telescoping mechanical mining platform has the benefits of being large in load bearing capacity, and being safe and reliable.

The invention discloses an automatic cutting machine for controlling the cutting length. The automatic cutting machine comprises a base. A supporting rod is fixedly connected to the upper surface of the base. A first motor is fixedly connected to the top end of the supporting rod. A protruding block is fixedly connected to the surface of the rotating shaft of the first motor. One end of the protruding block penetrates through an opening formed in the surface of a rotating strip and is exposed outside the rotating strip. One end of the rotating strip is movably connected to the surface of the first motor. The other end of the rotating strip is fixedly connected with one end of a connection rod. The other end of the connection rod is movably connected with a fixed plate. According to the automatic cutting machine for controlling the cutting length, by means of cooperation of a third motor and a rotating disc, a first fixed shaft and a first bearing move to produce thrust; then, by means of cooperation of a second fixed shaft and a second bearing, a second casing pipe moves, and the length of a telescopic rod is adjusted by adjusting the tightness degree of a bolt, so that the purpose of extension and retraction is achieved, the cutting length can be controlled, time and materials are saved, and use is more convenient.

The invention belongs to the technical field of cable expansion and contraction, and particularly relates to a bidirectional telescopic cable bridge. The bidirectional telescopic cable bridge comprises a telescopic bridge group arranged between two bridge box beams, and is characterized in that the telescopic bridge group comprises two Z-shaped cable bridges, a telescopic bridge beam A arranged between the two Z-shaped cable bridges, a telescopic bridge beam B, a telescopic bridge beam C, supporting mechanisms I respectively arranged at lower parts of the telescopic bridge beam A and the telescopic bridge beam C, supporting mechanisms II respectively arranged under two ends of the telescopic bridge beam B, and limit rolls respectively arranged at end heads of the telescopic bridge beam A and the telescopic bridge beam C; a cable is fixed on the two Z-shaped cable bridges, the telescopic bridge beam A and the telescopic bridge beam C respectively and is put on the telescopic bridge beam B to form an S shape. The bidirectional telescopic cable bridge provided by the invention is specially arranged between two bridge boxes on a bridge pier, and effectively prevents the cable from being pulled apart or damaged by extrusion according to the characteristics of expansion, contraction and displacement of the adjacent two bridge boxes, so that the cable continuously supplies power.

The invention aims to provide a telescopic foot protection plate which solves the shortcomings that the need for safety of shallow pits cannot be adapted and the like in the prior art. The telescopic foot protection plate comprises a fixed substrate, movable plates and a movable connecting rod, wherein the upper parts of the fixed substrate and the movable plates are provided with horizontal baserods with a horizontal guide groove; the middle part of the fixed substrate is provided with a vertical guide groove; a central hinge pin of the movable connecting rod hinged on the horizontal base rod of the movable plate reciprocates along the vertical guide groove of the fixed substrate; the fixed substrate and the movable plate or adjacent movable plates are hinged together through the horizontal guide grooves of the horizontal base rods and the end part hinge pin of the movable connecting rod, and the end part hinge pin of the movable connecting rod reciprocates along the horizontal guide grooves of the horizontal base rods; a foot protection plate lock is hinged on the horizontal base rod of the fixed substrate; and a locking pin matched with a lock hook of the foot protection platelock is fixed on the horizontal base rod of the movable plate. The telescopic foot protection plate is in a simple structure, easy to operate and safe and reliable to use.

The invention discloses a rotary type automatic comb. The comb comprises a handle and comb teeth, and also comprises a bracket, an external sleeve and a center shaft, wherein the bracket is provided with a through hole; the bottom end of the bracket is provided with a disc; the top end of the handle is provided with a first concave groove with a shape and a size matching with the disc; an outwardly-extended convex column is arranged inside the first concave groove; the top end of the convex column penetrates the through hole of the bracket and extends out of the top end of the bracket; the disc is inserted inside the first concave groove and rotatably connected with the bracket; the external sleeve is a cylindrical cylinder; one end of the external sleeve is connected with the top end of the bracket; the peripheral wall of the external sleeve is provided with a plurality of rows of circular holes; the center shaft is provided with a hollow cavity and arranged inside the external sleeve; the top end of the handle is inserted inside the hollow cavity arranged at the bottom end of the center shaft; and two ends of the center shaft are respectively provided with a set of involute wheel units. The rotary type automatic comb provided by the invention has the following advantage: during cleaning of hair of a pet, the hair can automatically fall down.

The invention relates to the technical field of medical instruments, and discloses a peripheral vessel interventional therapy microcatheter which comprises a catheter body; the catheter body comprises a tail catheter, a middle catheter and a front catheter; the tail catheter, the middle catheter and the front catheter are communicated, and each of the tail catheter, the middle catheter and the front catheter comprises a methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating layer; the outer layer and the middle layer of the catheter body are made of polyamide elastomers, the inner layer is made of polytetrafluoroethylene, the woven mesh of the catheter body is made of stainless steel, a catheter seat is made of polycarbonate, the tail catheter is provided with a radiopaque marker made of platinum-iridium alloy, and the tail catheter is coated with a methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating layer; the catheter body is designed by five sections of materials with different hardness; the catheter seat is a transparent conical joint, and the catheter body is woven by stainless steel; and the inner layer of the catheter body is the polytetrafluoroethylene coating layer, so that the microcatheter has good controllability, pushing performance, twisting performance and tracking performance, and is more suitable for peripheral vessel interventional therapy.

The invention discloses a furnace ramming mechanism of a furnace ramming vehicle for a large-capacity submerged arc furnace. The ramming mechanism comprises a protection mechanism, a scraping mechanism, an inner cylinder body and an outer cylinder body; a limiting plate is arranged outside the inner cylinder body; a shell is arranged on one side of the outside the inner cylinder body, the shell isfixedly connected with the inner cylinder body through a fixing plate, a first driving shaft is vertically fixed inside the shell, and the top end of the first driving shaft penetrates through the outer wall of the inner cylinder body and extends into the inner cylinder body. The protection mechanism is arranged on one side of a hopper, connecting seats are fixed on the opposite sides of a high-temperature-resistant ceramic protection plate and the hopper in the protection mechanism, a plurality of damping springs are fixed between the connecting seats, and the damping springs are arranged atequal intervals between the connecting seats, so that the protective effect is improved; during furnace ramming, the high-temperature-resistant ceramic protection plate plays a role in protecting, ametal conductor is prevented from causing danger by being directly collided with a large sleeve, brasses and electrodes in the furnace, and the damping springs play a certain role in buffering.

The invention discloses a construction rubber hammer with uniform punching force. The construction rubber hammer comprises a handheld device. The handheld device comprises a handheld rod which is internally and movably connected with a supporting rod, and a moving device is movably installed between the handheld rod and the supporting rod. One end of the interior of the supporting rod is rotationally connected with the side face of a rotation device through a driving device, and the other end of the supporting rod is rotationally connected with a hammer body. The rotation device is movably installed in the middle of an inner cavity of the hammer body. The driving device comprises a servo motor. The servo motor is fixedly installed in one end, away from the rotation device, of the supporting rod. The driving device is arranged to provide a power source for the rotation device, the servo motor enables a first gear to rotate through a rotation shaft, a driven gear meshed with the first gear is driven to rotate, accordingly, the hammer body rotates, an upper hammer head and a lower hammer head beat an object in turns, and due to driving of the gears and the motor, according to the mutuality of the force, it is concluded that the force for beating the object is uniform.