118results about How to "Reduce the center distance" patented technology

The invention is applicable to the technical field of wall-climbing robots, and provides a derusting wall-climbing robot for a ship. The derusting wall-climbing robot aims at providing the technical problem that in the prior art, an existing derusting wall-climbing robot for the ship is poor in obstacle climbing capacity. The derusting wall-climbing robot for the ship comprises a washing plate, a caterpillar track making contact with the wall face of the ship, a drive assembly, a driven floating assembly with driven wheels, a floating connection assembly driving the washing plate to automatically move up and down relative to the wall face of the ship, and a pressing assembly providing pre-pressing force so as to press the caterpillar track. According to the derusting wall-climbing robot for the ship, driving wheels are driven by the drive assembly to drive the driven wheels to move, and therefore the caterpillar track is driven to walk on the wall face of the ship; when the derusting wall-climbing robot encounters obstacles in the walking process, the washing plate is driven by the floating connection assembly to climb the obstacles; meanwhile, the inner tension of the caterpillar track is increased, and therefore the center distance between the driving wheels and the driven wheels can be reduced and the caterpillar track can be tightly attached to the wall face of the ship to climb the obstacles, and the wall face adaptability of the derusting wall-climbing robot for the ship is improved.

A twin-clutch transmission wherein a center distance between input shafts and an auxiliary speed-change shaft can be shortened and the number of gears can be reduced. A twin-clutch transmission is provided which includes a first input shaft and a second input shaft, an auxiliary speed-change shaft, and a plurality of gear pairs. The first and second input shaft are connected, through a first clutch and a second clutch, respectively, to an input element, and disposed on the same axis. The auxiliary speed-change shaft is disposed parallel to the first and second input shafts. The plurality of gear pairs are provided between the first and second input shafts and the auxiliary speed-change shaft. An input path from the input element to the first clutch is different from that to the second clutch, and primary ratios of the input paths are set to values, respectively, different from each other.

This invention relates to a transmission gearbox family to provide five, six, seven, eight and nine speed ratios with a reverse speed ratio and a neutral condition in motor vehicles. The invention arranges a plurality of gearwheels in parallel shaft systems such that minimum number of gearwheels is obtained by either combination of clutches with synchronizers for transmission gearboxes with a torque converter and direct clutch to clutch gearboxes without a torque converter, or synchronizers for automated manual transmission gearboxes. For total number of the gearwheels involving in forward driving, five-speed transmission gearboxes have eight gearwheels, six-speed transmission gearboxes have minimum of nine gearwheels, seven-speed transmission gearboxes have minimum of nine gearwheels, eight-speed transmission gearboxes have minimum of nine gearwheels and nine-speed transmission gearboxes have minimum of nine gearwheels, respectively. Each family member has three parallel shafts with either selectively or continuously interconnected with the gearwheels through the engaged single or multiple torque transmitting mechanisms. The direct clutch-to-clutch gearboxes without a torque converter and automated manual gearboxes have a mechanical damper and a main clutch.

The invention discloses a tool changer assembly and a machining center. The tool changer assembly comprises a tool changer. The tool changer comprises a tool changer body and a tool sleeve used for installing a tool; the tool sleeve is rotationally connected to the tool changer body so as to overturn between the tool storing position and the tool changing position; the tool changer assembly further comprises a telescopic mechanism; the fixed end and the telescopic end of the telescopic mechanism are rotationally connected to the tool changer body and the tool sleeve correspondingly through a corresponding rotating pair; when the telescopic mechanism extends / shrinks, the tool sleeve is pushed away from / pulled close to the tool changer body; and meanwhile, each rotating pair works to make the tool sleeve overturn relative to the tool changer body. According to the tool changer assembly, by means of a small-size tool reversing mechanism, a tool reversing block in the prior art is saved, a tool disk is pre-arranged, differenced from a traditional tool changer, the front and back distance is greatly shortened, the center distance between machine tool main shafts is also reduced, the machine tool volume is reduced, the tool changing position is closer to a tool arm, it is easy to reduce the length of the tool arm used in cooperation with the tool changer assembly, and therefore the tool arm structure is optimized.

The invention relates to a driving mechanism of a particle crusher. The driving mechanism of the particle crusher comprises a quick roller, a slow roller, an idle gear I and an idle gear II, wherein a driving gear is arranged on an axial end on one side of the quick roller; a slow roller driving gear is arranged on the axial end on the same side of the slow roller; two pair of supporting plates are respectively arranged on the axial ends on the two sides of the slow roller; the two pairs of supporting plates synchronously swing through the driving of a synchronous adjusting mechanism, so the distance between the quick roller and the slow roller is synchronously and uniformly adjusted; the synchronous adjusting mechanism comprises two groups of turbine worm pairs and screw rod nut pairs; the nuts of each group of screw rod nut pairs are turbines of the turbine worm pairs; each group of screw rods is axially and fixedly connected with an adjusting rod; the adjusting rod is connected with a supporting plate; a spring which elastically resets the supporting plate is arranged between the adjusting rod and the supporting plate; and the two groups of worms are coaxially connected througha driving shaft to realize synchronous rotation. Due to the adoption of the driving mechanism of the particle crusher, when the distance between the rollers is adjusted, a gear driving system is always in an optimal meshing state, the distance between the quick roller and the slow roller is synchronously adjusted precisely, the frequency of replacing the rollers is reduced, and the application range of the particle crusher is widened.

The hydraulic coal mine support for low-position roof blasting-down consists of single row double uprights with top beam and pedestal hinged to ends, securing beam hinged to back of the top beam, coal blasting mechanism behind the securing beam, front link rod and back link rod hinged to between the pedestal and the securing beam, pedestal pushing mechanism, top beam protecting unit, balancing jack hinged to between the top beam and the securing beam, etc. The coal blasting mechanism consists of tail beam, board inserting jack, inserted board and tail beam jack. The hydraulic coal mine support is developed by synthesizing available supports, and has the advantages of homogeneous upright stress, compact structure, high support strength, high safety, etc.

The invention discloses a straight-line type anti-jamming double-redundancy electromechanical actuator, and the electromechanical actuator has the characteristics of the anti-jamming and the double redundancy, namely a main working mode and a backup working mode which are mainly realized through a straight-line transmission mechanism. A main function component of the straight-line transmission mechanism is a nested roll-ball screw-rod pair which comprises an outer screw rod and an inner screw rod, wherein the outer screw rod mainly works, and the inner screw rod serves as the backup. Accordingto the straight-line type anti-jamming double-redundancy electromechanical actuator, the radial-direction occupation space is reduced by means of the nested layout, an axial-direction zero position length is shortened at the same time, and the specific power of the actuator is increased.

The invention discloses a mass transfer head and method for an electronic element, and relates to the technical field of electronic element production. The transfer head comprises a memory alloy substrate and a plurality of electronic element pick-up heads fixed on the first surface of the memory alloy substrate. At the same temperature, the center distances between any two adjacent electronic element pick-up heads are equal; the memory alloy substrate deforms along with the change of temperature; when the temperature rises, the memory alloy substrate stretches, and the center distance between any two adjacent electronic element pick-up heads is increased; when the temperature decreases, the memory alloy substrate is shrunk, and the center distance between any two adjacent electronic element pick-up heads is reduced. The distance between the electronic element pick-up heads fixed on the memory alloy substrate can be adjusted by the adjustment of the temperature. The mass transfer head is flexibly suitable for different Micro-LED pitches and pixel pitches, thereby avoiding the consumption of the Micro-LED resources.

The invention relates to a four-stage driving combined type speed reducer and a speed reduction method thereof. The four-stage driving combined type speed reducer with small teeth difference is a bevel gear-planetary-parallel shaft-four-stage drive with small teeth difference and structurally comprises an input gear pair, a middle planetary gear pair, a parallel shaft gear pair, an output gear pair with small teeth difference, a box body and an end cover. The principle of the speed reduction method of the four-stage driving combined type speed reducer with small teeth difference is that the speed reduction of the speed reducer is realized through a first-stage driving bevel gear drive, a second-stage planetary gear drive, a third-stage driving parallel shaft drive and a fourth-stage driving drive with small teeth difference. The invention has the advantages that the transmission speed ratio and the output torque of the vertical speed reducer are greatly improved, and the bearing capacity and the overload capacity are strong; and the vibration noise is low, the heat dissipation is rapid, the gear machining precision is improved, the machining precision can be ensured easily, the volume and the weight of the entire speed reducer are reduced, the manufacturing cost of the large-power vertical speed reducer is greatly reduced and the production cycle is shortened.

In a worm reducer for reducing the rotation transmitted to a worm and transmitting the reduced rotation to a worm wheel, the worm reducer being composed of the worm with screw faces formed on its outer periphery and the worm wheel with worm wheel teeth formed on its peripheral surface, the worm wheel teeth being in mesh with the screw faces of the worm, the worm wheel teeth are formed so that the lead angle of the worm wheel is smaller than that of the worm.

The invention discloses a transport cart with an omnibearing movement function. The transport cart with the omnibearing movement function comprises a cart body platform, dual differential driving units, a goods platform, a control cabinet, an acceleration sensor, a battery power set and a wireless communication module. An embedded controller and a servo motor driver are arranged in the control cabinet. The four dual differential driving units are movably connected with the cart body platform. Both the control cabinet and the battery power set are fixedly connected into the cart body platform. An ultrasonic sensor, the acceleration sensor and the wireless communication module are fixed to the cart body platform. Numerical values measured by the acceleration sensor are transmitted to the embedded controller through the wireless communication module, and the servo motor driver drives the dual differential driving units according to the control quantity worked out by the embedded controller so as to achieve omnibearing movement of the cart body platform. According to the transport cart with the omnibearing movement function, through the coordinated control of the four dual differential driving units, the control performance of the system is improved, and the moving speed of the cart body platform is made more stable.

An engine for a motorcycle includes an engine case split in an upper case section and a lower case section. A mating surface between the upper case section and the lower case section extends linearly and inclines forward downward in a side view of the motorcycle. A crankshaft, a transmission input shaft, and a balancer shaft extending in the width direction of the motorcycle are rotatably supported at the mating surface, and a transmission output shaft rotated by the transmission input shaft is supported in the lower case section. The balancer shaft, the crankshaft, and the transmission input shaft are arranged in that order from the front side in the running direction of the motorcycle. The transmission output shaft is disposed below the transmission input shaft.

The invention relates to a harvesting unit body of a small row spacing corn harvesting machine, which comprises a plurality of groups of harvesting bodies and a straw cutter arranged on a header mounting bracket, wherein each group of the harvesting bodies comprises a pair of picking rolls, a pair of reeling devices arranged at the front end of the header mounting bracket, and a straw gripping conveyer arranged on the header mounting bracket between reeling outputs of each pair of the reeling devices and guide ends of the picking rolls. The harvesting unit body is characterized in that a bracket body of the header mounting bracket which is between the reeling outputs of each pair of the reeling devices of two adjacent groups of the harvesting bodies and the guide ends of the picking rollsand is provided with the straw gripping conveyer takes a symmetrical central line of the picking rolls of the two adjacent harvesting bodies as a reference to symmetrically tilt towards the central line, the center distance of two gripping input ends of adjacent straw gripping conveyers is kept between 350 and 450 millimeters, and two gripping output ends of the adjacent straw gripping conveyers correspond to the guide ends of the picking rolls respectively. The harvesting unit body of the small row spacing corn harvesting machine has the advantages of compact structure, low cost, reliable useand strong adaptability, and is suitable for harvesting small raw spacing corns.

In a power unit, a counter shaft of a transmission and a crank shaft of an internal combustion engine, both located below a main shaft of the transmission, are arranged parallel to each other on a separating plane H of a crankcase. In a transmission mechanism T which drives an oil pump located below the separating plane H, a drive sprocket is placed on the main shaft of the transmission and a driven sprocket is placed on a drive shaft of the oil pump. An endless chain slidably touches a slender long chain guide along the running direction of the endless chain. The chain guide is fitted only to an end wall of an upper crankcase at its fitting part. The chain guide stretches across the end wall of the upper crankcase and an end wall of a lower crankcase, and effectively suppresses vibration of the endless chain.

The invention discloses a silicon wafer wire cutting machine which comprises a cutting head, a feeding table, a feeding table fixing frame, a wire winding and unwinding tool, a wire drum chamber and a main motor. The feeding table is fixed to the feeding table fixing frame. The cutting head is located below the feeding table. The wire winding and unwinding tool is arranged on one side of the cutting head, and a wire drum chamber is arranged on the other side of the feeding table fixing frame. Mortar nozzles are arranged on the two sides of a cutting guiding wheel, after boxes are fully filled with mortar, the mortar flows out at a constant speed, impact force on the silicon wafer is small, and the mortar on the two sides can be evenly distributed on a wire net. According to the cutting head of the silicon wafer wire cutting machine, the central distance between mounting holes is smaller, the wire net is smaller, stability is higher, wires are not prone to breaking, cutting quality is higher, and production efficiency and the silicon wafer percent of pass are increased.

The present invention relates to an overturn type manipulator which comprises a driving arm, a driven arm, an overturn control cam, a clamp control cam, a clamp spring, a left jaw and a right jaw. The driving arm is fixed at a turnplate by a driving arm shaft. The driven arm is fixed at the turnplate by a driven arm shaft. One end of the driving arm is equipped with the left jaw by a left jaw rotating shaft. The other end of the driving arm is connected with one end of the driven arm by a gear pair. The other end of the driven arm is equipped with the right jaw by a right jaw rotating shaft. The left jaw rotating shaft is connected with an overturn transmission mechanism which is used for controlling the left jaw rotating shaft to rotate. The overturn transmission mechanism is contacted and matched with the overturn control cam. The present invention provides an overturn type manipulator which has simple and compact structure and low manufacturing cost, occupies small space and works stably and reliably.

The invention relates to a steel and aluminum composite conductor rail with a dovetail groove and belongs to equipment for urban mass transit. The steel and aluminum composite conductor rail with the dovetail groove is characterized in that the dovetail groove (4) is formed in the left side of an aluminum rail body (1), inward inclined faces (8) of 30 degrees are arranged on the upper side and the lower side of the top face (10) of the right side of the aluminum rail body (1), and two supporting lugs (5) on the outer side of the top of the aluminum rail body (1) are provided with groove bottoms (6) and middle ditches (7). A connecting plate (11) of a middle connector is provided with a dovetail-shaped top (12) which can be embedded in the dovetail groove (4). Two dovetail-shaped tops (19) of an insulation support (17) can be arranged on a straight flow positive electricity composite rail body (15) and a back flow negative electricity composite rail body (16) in a sleeved mode, and thus stainless steel contact faces of two steel and aluminum composite conductor rails are made to be located in the same vertical plane.

The invention discloses a three-in-one electric driving integrated system of a new energy vehicle. The system comprises a half-shaft mechanism, a controller, a motor and a transmission box, wherein the motor is provided with an integrated housing and an integrated end cover; the two ends of the half-shaft mechanism are fixedly connected with the integrated housing and the integrated end cover; thetransmission box is connected with the integrated housing of the motor; the integrated housing, the integrated end cover and the half-shaft cooperatively surround to form an odd space; the controlleris installed in the odd zero space and fixed to the housing of the motor. The motor housing and the right end cover of the transmission box are designed into an integrated structure, the output half-shaft supporting frame and the motor housing rear end cover are designed into an integrated structure, a half-shaft cage is moved back to the outer side of the rear end cover of the motor, so that previous space which is preserved for preventing the moving interfering of the output half-shaft and the motor and the controller is omitted, and therefore the central spacing between the output half-shaft of the input half-shaft of the transmission box is reduced to the minimum through the designing.

The invention provides a carving head with feed movement, which consists of a carving head control system and an execution mechanical system, wherein, the carving head control system consists of a single chip system which depends on an electrical contact for tool setting; the execution mechanical system comprises the feed movement and a mechanism of high-speed rotating and cutting movement, which are integrated and realized in the manner of nesting. An input port of the single chip system receives signals of standard numerical control commands from a numerical control system; the signals are transformed into special control signals of a stepping motor after processed inside the single chip and then are outputted to the stepping motor through a command transforming interface, thereby realizing the separate control of feed movement of the carving head. Simultaneously, the tool setting process is realized by cycled detection of the signals of the electrical contact by the single chip system, and the numerical control system can be monitored in the whole process and can be removed at any time. The carving head with feed movement combines a movable feed mechanism and a principal axis with high-speed rotation in the manner of nesting, thereby decreasing the carving head size, overcoming the problem of limited space after the conventional principal axis is provided with a feed device, increasing the complete performance and production efficiency and guaranteeing the product quality.

The invention relates to a worm gear and worm set with a center distance adjustment and a clearance elimination mechanism. The worm gear and worm set comprise a worm gear (4) and a worm(11) which are mutually engaged and also comprises a shell body (2), a first bearing (5), a second bearing (12), and a fastening bolt (9), wherein the shell body(2 covers the worm gear (4) and the worm (11); the two ends of the worm set(11) are respectively arranged inside of the shell(2) through the first bearing(5) and the second bearing(12); the fastening bolt(9) passes through the shell and the bottom of the fastening bolt is centered on the outer ring of the first bearing (5); a pressing force is applied along the radial direction of the first bearing (5) so that the worm gear (4) is attached to the worm set(11). Compared with the prior art, the worm gear and worm set can solves the problems that the transmission resistance and the transmission efficiency of the central distance machining error and the use of abrasion are not consistent. The worm gear and worm set has the advantages that the worm gear driving has stable characteristics and smooth transmission; noises are reduced and the maneuverability and comfort of the car are improved.

A compact and lightweight range switching apparatus is provided by suppressing the increase in the size of components in the range switching apparatus. The range switching apparatus includes: a motor mounted in a housing; a pinion placed on a shaft of the motor; a sector-shaped gear wheel having an opening inside which a gear engaging the pinion is formed; and an output shaft rotatably supporting the gear wheel in the housing.

The invention discloses a self-locating high-sealing large-flow three-way valve. The three-way valve comprises a shell, wherein the shell comprises a water inlet channel, a first water outlet channel,a second water outlet channel and a valve cavity, the first water outlet channel and the second water outlet channel communicates with the water inlet channel in a switching mode, a valve element ismounted in the valve cavity and comprises a motor base and a three-way framework, the shell, the motor base and the three-way framework are made of plastic materials, the lower end of the motor base extends downwards to form a motor base clamping head, a three-way framework clamping groove allowing the motor base clamping head to be mounted from the side face is formed in the upper end of the three-way framework, the motor base and the three-way framework are connected by inserting the motor base clamping head into the three-way framework clamping groove in a matched mode, and the motor base is connected with the shell through clamping screws. According to the three-way valve, self-locating during mounting can be conveniently realized through the motor base and the three-way framework.