58results about How to "Increase working length" patented technology

A socket includes a main body including a first cylinder having an outer periphery formed with a plurality of outer teeth, and a second cylinder having an inner periphery formed with a plurality of inner teeth. The inner teeth of the main body and the outer teeth of the main body have the same tooth number and have the corresponding tooth shape. Thus, the sockets can co-operate with each other to increase the working length, and the sockets co-operating with the ratchet wrench can be used in an elongated shallower space.

The invention relates to a tensioner assembly for a traction medium drive, specifically a chain drive, with at least two traction medium wheels and a flexible traction medium, comprising a tensioning rail which can be pressed against the traction medium by means of a tensioning device, wherein the tensioning rail is applied against at least one sliding guide and can be displaced along the at leastone sliding guide by means of the tensioning device.

The invention discloses a bent optical fiber ATR (attenuated total reflectance) glucose sensor reinforced on the basis of silver nanoparticles. The bent optical fiber ATR glucose sensor comprises an optical fiber. The optical fiber comprises an optical fiber core and optical fiber cladding, the optical fiber cladding wraps the outer periphery of the optical fiber core, optical fiber connectors which are used for being connected with external components are respectively connected to two ends of the optical fiber, a bent sensitive area is formed in the middle of the optical fiber, and the silver nanoparticles grow on the outer surface of the portion, which is positioned in the sensitive area, of the optical fiber. The optical fiber is a multi-mode optical fiber. The optical fiber core and the optical fiber cladding are made of silver halide materials, and light with the wavelength ranging from 4 micrometers to 18 micrometers can be transmitted through the optical fiber core and the optical fiber cladding. The portion, which is positioned in the sensitive area, of the optical fiber is of a U-shaped structure or a single-ring structure or a structure with two or more rings. The diameter of each silver nanoparticle ranges from 20 nanometers to 100 nanometers. The bent optical fiber ATR glucose sensor has the advantages that the bent optical fiber ATR glucose sensor is simple in structure and operation, small in size, easy to process and low in cost, and can be subcutaneously implanted into a human body, so that the blood glucose concentration of the human body can be continuously monitored in an online manner and can be directly measured in vivo, and the requirement on continuously monitoring the blood glucose concentration of the human body in real time can be met.

The invention discloses a numerical control deep hole keyway milling machine and belongs to the technical field of machine tools. A working table is mounted on the tool body of the machine tool; a servo tailstock is fixedly mounted at the front end of the working table; a main transmission case is arranged on the rear of the tool body of the machine tool; a cantilever boring frame stretching forward is arranged on the main transmission case; a machine tool electric cabinet and a machine tool control panel are arranged on the two sides of the main transmission case; a hydraulic station is arranged outside the front end of the tool body of the machine tool; the length of the cantilever boring frame is greater than 10 times of the radial size of the cantilever boring frame; a milling axle boxdriven by the main transmission case to move front and back is arranged in the cantilever boring frame; the power source of the milling spindle of the milling axle box is also from the main transmission case outside the cantilever boring frame; a workpiece is hoisted and placed on a support frame, the working table is moved backwards to enable the deep hole of the workpiece to be arranged outsidethe cantilever boring frame in a sleeving manner and to connect the front end of the cantilever boring frame with the tailstock at the front end of the working table; a cutter feeding size is manually adjusted; the cutter is controlled to operate through the main transmission box; and the milling axle box is controlled to move to the front end from the rear end of the deep hole workpiece throughthe main transmission box so as to realize a deep hole milling groove.

The invention relates to a side braking ratchet wheel tension compensation device of an electrization railway, comprising a braking support frame. The braking support frame is connected with a ratchet wheel shaft through two rotary arms; the ratchet wheel shaft and a ratchet wheel body are coaxially arranged through a sliding bearing made of self-lubricating composite material; the ratchet wheel body can rotate around the ratchet wheel shaft and consists of a hub, a plurality of radial plates and a wheel flange; a tension wheel groove A and a tension wheel groove B are respectively arranged at the two sides of the radial plates of the ratchet wheel body and the outer circumference surface of the hub; rope troughs are arranged in the two grooves; the outer circumference surface of the wheel flange is provided with a ratchet wheel trough the bottom of which is cast with a rope trough and a steel wire rope hole; braking gear rings are symmetrically cast on the two sides of the wheel flange; and the lower end of the braking support frame is fixedly connected with a buffer brake device. The invention is suitable for a working state that a carrier cable and a contact line slowly change under the influence of environment temperature, overcomes the defects of frequent off-line, arc discharge, burning of a contact line and the like of a pantograph of a locomotive, is free from oil injection and maintenance and has long service life.

The invention relates to a light-emitting diode (LED) circuit board component. The LED circuit board component comprises one or more LED circuit boards (1), a positive main wire (3) and a negative main wire (4), a plurality of serially-connected LED groups are arranged on each LED circuit board (1), each serially-connected LED group comprises a plurality of serially-connected LEDs (2), and the serially-connected LED groups are connected in parallel to the positive circuit (5) and the negative circuit (6) of the LED circuit board (1); the positive main wire (3) and the negative main wire (4) are separated from the LED circuit boards (1) by a certain distance; and a positive circuit (5) is connected with the positive main wire (3) through a positive connecting wire (13), and the negative circuit (6) is connected with the negative main wire (4) through the negative connecting wire (14). The LED circuit board component is low in manufacturing cost and high in radiating performance, the reliability of a product is greatly improved, the actual service life is greatly prolonged, and working length of the product is increased.

The invention provides a wireless handheld dust collector, and belongs to the technical field of dust collectors. The wireless handheld dust collector comprises an air inlet pipe, a dust collection cup, a motor, a battery and a handle, wherein the side wall of the dust collection cup is communicated with the air inlet pipe; the motor is connected on the side wall of the dust collection cup, and the axis of the motor is parallel to the air inlet pipe, and meanwhile is perpendicular to the center line of the dust collection cup; the battery is coaxially connected to the end of the motor; one endof the handle is connected with the dust collection cup, the other end of the handle is connected with the motor or the battery, and the middle of the handle is suitable for hand holding. The wireless handheld dust collector is of a layout structure of sequentially arranging the air inlet pipe, the dust collection cup and the motor, the motor is connected on the side wall of the dust collection cup, the axis of the motor is parallel to the air inlet pipe, and meanwhile is perpendicular to the center line of the dust collection cup, dustiness directly enters the tangent line of the side wall of the dust collection cup from the air inlet pipe, dustiness can be separated, and dust collection efficiency is guaranteed; meanwhile, the motor is parallel to the air inlet pipe, the whole dust collector is still in a stream-line shape, and the contact whole structure is guaranteed.

The invention discloses a portable support, which comprises a main beam, an extension pipe, a bracket and a plurality of support legs, wherein the main beam is provided with a sliding chute or a through hole along the axis direction; the extension pipe is positioned in the sliding chute or the through hole and slides in the sliding chute or the through hole; the bracket is arranged on the main beam and slides along the main beam; and the plurality of the support legs support the main beam. The portable support has the advantages that the portable support can increase the working length of the support through the extension pipe, and greatly improve the practicality and convenience of the support; while a wheel set and the foldable support legs can greatly increase the transport and carrying convenience of the support; in addition, the design of the adjustable length of the support legs greatly increases the convenience that the support is used outdoors.

The invention discloses biomass carbonizing equipment, wherein conveyers are arranged in the vertical direction in a wrinkle manner, every two conveyers are connected through a corrugated pipe, each conveyer is covered with an electric heating device, insulating layers are arranged outside the conveyer and the corrugated pipe and completely cover the whole conveyer and the corrugated pipe, the gap between the electric heating device and the insulating layer is a heating space, the corrugated pipe is internally provided with a temperature probe which is connected with a temperature control system, the temperature control system is further connected with the electric heating device, each conveyer is provided with an oil/gas conveying pipe communicated with the inner cavity of the conveyer, the oil/ gas conveying pipe on each conveyer is connected with an air injection combustion mechanism in the heating space, and a discharge opening is communicated with a cooling mechanism. The equipment disclosed by the invention solves the problem in the prior art that oil and gas block the pipeline, carbonization heating is non-uniform, and the carbonizing quality is low because of too small carbonizing temperature gradient or no gradient, has the characteristics of low energy consumption and no pollution, and can be applied to carbonization of various biomasses.

The invention relates to a precise seed-metering unit with an air injection-seed cleaning combined geneva wheel in the field of agriculture seeding machinery. The precise seed-metering unit is provided with a precise seed-metering wheel which is arranged in a seed-metering unit housing and can rotate, a plurality of rows of small seed-metering holes are formed in one end of the precise seed-metering wheel, seed-metering slots are uniformly distributed in the periphery of the other end of the precise seed-metering wheel, an air injection pillar is arranged at the lower part of the seed-metering unit housing and is internally tangent with the segment of the small seed-metering holes of the precise seed-metering wheel, air vents are formed in the air injection pillar, the end of the air injection pillar is sealed, air injection holes are arranged downwards, and every one row of small seed-metering holes correspond to one air injection hole. Compared with the background art, the precise seed-metering unit has the advantages that seed pushing by a seeding pushing gear is changed to be high-pressure gas seed cleaning, the size and the number of the precise seed-metering holes are not affected by the seed pushing gear, processing can be carried out randomly, and even smaller seeds can be precisely sown.

The invention provides an exhaust device. A spring is arranged between an inner core and an outer sleeve, and coats the inner core; an exhaust cavity is formed between the outer sleeve and the inner core; the inner core includes a core head, a core rod and a core tail; the diameter of the lower end surface of the core head is larger than the diameter of the upper end surface of the core rod; and the spring and the upper end of the core rod are in clearance fit. The exhaust device solves the problems of easy glue blockage and incapability of removing glue in a gap of the spring.

The invention discloses a tractor top-mounted type building hoist suitable for a building well shaft. The tractor top-mounted type building hoist suitable for the building well shaft comprises a tractor, a ridge spar, a traction medium, a hanging cage and a counterweight. The ridge spar is fixed to the upper end of the building well shaft. The tractor is fixed to the ridge spar. A first pulley isarranged on the top of the hanging cage. A second pulley is arranged on the counterweight. One end of the traction medium is downwards guided out of the tractor, passes by the first pulley and is thenupwards guided to the ridge spar to be connected with the ridge spar. The other end of the traction medium is downwards guided out of the tractor, passes by the second pulley and is then upwards guided to the counterweight to be connected with the counterweight. The traction medium is a steel wire rope or a steel belt. The ridge spar can rise or fall. The hoist has the advantages of high safety,high rising and falling speed and low noise.

The invention discloses a shaft elevator with an underlying traction machine for building construction. The elevator comprises the traction machine, a top beam, a traction medium, a suspension cage and a counterweight, wherein the top beam is fixed at the upper end of a building shaft, and the top beam is capable of moving up and down; the traction machine is fixed below the top beam; the top of the suspension cage is provided with a first wheel set, the counterweight is provided with a second wheel set, and the top beam is provided with a third wheel set and a fourth wheel set; one end of thetraction medium is led upwards from the traction machine, is led downwards to the first wheel set after bypassing the second wheel set, and is led upwards and fixed after bypassing the first wheel set; the other end of the traction medium is led upwards from the traction machine, is led downwards to the second wheel set after bypassing the fourth wheel set, and is led upwards and fixed after bypassing the second wheel set; and the traction medium is a steel wire rope or a steel belt. The shaft elevator with the underlying traction machine for building construction has the advantages of highersafety, high lifting speed, low noise and labor saving.

The invention discloses a rotary extension-type ladder device and belongs to the field of operation platforms. The rotary extension-type ladder device comprises a column, wherein at least one layer of platform is arranged on the column, the number of layers can be adjusted flexibly according to different working heights, actuators are arranged on the column and drive the platforms to rotate around the column, a self-locking device and a locking device are arranged on the column, an extension part is arranged on each platform, the working space of the platform can be increased, when the height of a workpiece is lower, the rotary extension-type ladder device which doesn't participate in working rotates to the other side of equipment completely, up-and-down motion can be realized by the aid of the ladder, the problem that the working platforms are inconvenient to carry is solved, and the utilization of the processing spaces is further improved by rotation and extension of the platforms.

An extension structure includes a track, an extension table, and a sliding interface unit. Thus, the extension table can be moved on the track rapidly, easily and conveniently by the sliding guide motion of the sliding interface unit so as to extend the working length of the table of the table saw. In addition, the sliding interface unit has a cheaper price than that of the bearings, thereby decreasing the costs of fabrication of the extension structure. Further, the extension structure is assembled easily and conveniently, thereby facilitating a user mounting the extension structure.

The invention relates to a double-channel combustion heat exchanger, comprising a barrel-shaped main body formed by an inner barrel and an outer barrel, wherein the interior of the inner barrel is hollow, and a combustion chamber used for burning mixture of gas and air and a smoke exhaust channel used for enabling high temperature flue gas to be conveyed downwards are formed in the inner barrel; two groups of heat exchange channels are arranged between the inner barrel and the outer barrel; the lower end of the barrel-shaped main body is provided with a heating return water connector and a cold water connector; the upper end of the barrel-shaped main body is provided with a hot water connector and a heating outlet water connector; the first group of heat exchange channel is connected between the heating return water connector and the heating outlet water connector; the second group of heat exchange channel is connected between the cold water connector and the hot water connector. The high temperature flue gas produced by the double-channel combustion heat exchanger is transmitted and discharged downwards from top to bottom, heating system water or domestic water in the heat exchange channels flows from bottom to top, heat exchange is carried out between the heating system water or the domestic water and the high temperature flue gas, and convection is formed since the combustion direction is opposite to the heat exchange direction; furthermore, the combustion chamber is in a long barrel shape, thus being longer in heat exchange length and larger in heat exchange area; therefore, the heat exchanger has very high heat exchange efficiency, and the heat exchange efficiency reaches up to 107% or more.

The invention provides a glass fiber reinforced plastic raw material stirring device with efficient stirring, heating and uniform discharging, and relates to the technical field of glass fiber reinforced plastic raw material mixing. The glass fiber reinforced plastic raw material stirring device with efficient stirring, heating and uniform discharging comprises a device main body, supporting legs are fixedly installed at the bottom of the device main body, a driving motor is fixedly installed in the center of the surface of the device body, a feeding port is formed in the position, on the upper left portion of the driving motor, of the surface of the device body, a discharging opening is formed in the bottom of the device body, and a stirring cavity and a storage cavity are formed in the device body. According to the glass fiber reinforced plastic raw material stirring device with efficient stirring, heating and uniform discharging, through the multiple stirring structures, the uniform stirring effect can be achieved, heating can be conducted by increasing the working length of the heating resistance wires, finally uniform stirring of glass fiber reinforced plastic raw materials is achieved, and in the stirring process, materials in the device can be uniformly discharged at the same time.

The invention provides a transverse wire cutting device and a control method thereof. The transverse wire cutting device comprises a machine base, a liquid storage tank, a wire winding mechanism and an electrode wire, the bottom end of the machine base is connected with an electrification guide mechanism in a suspended mode, and the electrifying guide mechanism comprises a conductive assembly, a first guide and a second guide which are arranged at intervals transversely; the liquid storage tank is positioned below the machine base, the liquid storage tank is of a hollow structure with an openupper end, and both the first guide and the second guide extend into the liquid storage tank; the wire winding mechanism comprises a first wire winding drum and a second wire winding drum which are positioned on two sides of the machine base; the first end of the electrode wire is connected with the first wire winding drum, and the second end of the electrode wire penetrates through the electrifying guide mechanism to be connected with the second wire winding drum. According to the electrode wire, the workpiece is transversely cut, the wire clamping phenomenon is effectively avoided, the situation that the workpieces collide with each other is avoided, and the cutting operation can be efficiently carried out for a long time.