60results about How to "Smooth shifting" patented technology

The utility model discloses a gear shifting device of a robot gearbox, which comprises a driving shaft, a middle shaft and a shifting fork shaft which are arranged in the gearbox, a plurality of driving gears which synchronously rotate with the driving shaft are arranged on the driving shaft, and a plurality of driven gears which are correspondingly meshed with the driving gears are sleeved on the middle shaft. A synchronizer corresponding to each driven gear is further arranged on the middle shaft, a shifting fork capable of shifting the synchronizers to slide in the axial direction of the middle shaft and locking the synchronizers and the corresponding driven gears is arranged on the shifting fork shaft, and a gear shifting driving mechanism which is driven by a motor and enables the shifting fork shaft to push and pull in the axial direction to achieve the gear shifting action is arranged outside the gearbox. The gear shifting driving mechanism is an elastic gear shifting mechanism which has a bidirectional elastic buffering effect in the push-pull direction of the shifting fork shaft. In the gear shifting process of the gear shifting device of the robot gearbox, the synchronizer and the driven gear are locked after being in elastic contact, damage caused by rigid collision between the synchronizer and the gear in the gear shifting process can be avoided, and non-stop gear shifting can be achieved.

The invention discloses a six-shaft simple electric control speed change clutch sheet type electric driving system which comprises a power input mechanism, a speed change assembly and a two-shaft power output mechanism, and a power input shaft, a speed reduction shaft assembly, a reverse gear shaft mechanism and the two-shaft power output mechanism of the speed change assembly are arranged on the periphery of a main shaft in the circumferential direction. And the structure is simple and reliable, the expansibility is excellent, and various functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power can be flexibly expanded according to actual requirements. The motor can always and efficiently keep working in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is achieved, and harmony and unification of people, vehicles, roads and running resistance / running loads are achieved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The invention discloses a power-interruption-free multiplexing actuator two-gear change wheel-side dual-motor independent driving system which comprises a first driving motor, a first primary speed reducer, a first duplex planetary compound gear train, a first intermediate shaft, a first secondary speed reducer, a first output shaft, a first controllable one-way clutch and a first hydraulic multi-plate friction clutch. And the second driving motor, the second first-stage speed reducer, the second duplex planetary compound gear train, the second intermediate shaft, the second second-stage speed reducer, the second output shaft, the second controllable one-way clutch and the second hydraulic multi-plate type friction clutch. The driving systems are arranged in a centralized mode and independently drive wheels on one side, and the same gear shifting control mechanism is reused on the two sides. By controlling the controllable one-way clutch and the multi-piece type friction clutch, seven driving modes including first-gear driving, second-gear driving, neutral gear, first-gear regenerative braking, second-gear regenerative braking, reverse running and parking braking can be achieved, and switching of the driving modes on the two sides can be completed at the same time without power interruption.

The invention relates to the technical field of transmissions, in particular to a flexible driving mandrel and a gear adjusting device.The flexible driving mandrel comprises a mandrel body and a plurality of positioning bosses arranged on the outer wall of the mandrel body in the axial direction, and the mandrel body is sleeved with gear driving blocks corresponding to the positioning bosses in position and number; the adjacent gear driving blocks and the adjacent positioning bosses are evenly distributed in the circumferential direction of the mandrel in an angle mode. An avoiding notch matched with the positioning boss is formed in the edge of a center hole of the gear driving block and is used for providing a swingable gap for the positioning boss; a clamping groove is formed in the outer edge of the gear driving block; and one end of the torsion spring is fixed on the mandrel, and the other end of the torsion spring is clamped on the gear driving block. According to the invention, heavy-load gear-up and light-load gear-down can be realized without stopping feet, power loss caused in the gear-shifting process can be avoided, the gear-shifting process is more flexible, riding is more comfortable, and high-low gear switching is rapid and stable.

The invention discloses a four-shaft middle inertia reversing taper clutch type electric control automatic speed changing electric driving system which comprises a power motor, a speed changing assembly and a two-shaft power output mechanism, meanwhile, the function of manual control reversing is achieved, and the system is simple and reliable. An electric control gear shifting mechanism is installed at one end of the main shaft, active high and low speed gear shifting and manual control front and back gear shifting can be achieved, and an electric control algorithm is extremely simple. In the active gear shifting process, the taper clutch mechanism can serve as an excellent vibration absorption mechanism, gear shifting impact is effectively absorbed, and the gear shifting process is extremely stable; the motor can always and efficiently work in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, and harmony and unification of people, vehicles, roads and running resistance / running load are realized; the important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The invention discloses a five-shaft simple electric control speed change clutch plate type electric driving system which comprises a power input mechanism, a speed change assembly and a two-shaft power output mechanism, and the speed change assembly comprises a main shaft, a speed reduction shaft assembly, a frame clutch plate mechanism and an elastic mechanism. The system is simple and reliable in structure and excellent in expansibility, can flexibly expand various functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power according to actual requirements, and meets the design requirements of platformization and modularization. Moreover, the motor can always work efficiently in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, harmony and unification of people, vehicles, roads and running resistance / running load are realized, and the driving safety is improved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The utility model discloses a gear shifting support for a motorcycle. The gear shifting support comprises a support seat and a gear shifting assembly, wherein the two opposite ends of the support seat are detachably connected to an engine shell of the motorcycle respectively; the gear shifting arm is approximately centered and rotatably connected to the support base relative to the two opposite ends of the support base, the support base and the gear shifting arm are coaxially arranged, and the first end of the gear shifting arm is fixedly connected with a gear shifting shaft extending out of an engine shell. The second end, opposite to the first end, of the gear shifting arm is hinged to a speed change connecting rod of the motorcycle. By arranging the support base and the gear shifting arm rotationally connected to the support base, the support base supports the gear shifting arm, the fulcrum is closer to the speed change connecting rod, and therefore redundant displacement between parts of the gear shifting support is effectively reduced, transverse displacement of the gear shifting support is eliminated, gear shifting is more compact and accurate, and the gear shifting efficiency is improved. Therefore, mistaken gear shifting and false neutral gear are effectively prevented, and more stable gear shifting is achieved.

The invention discloses a speed control system. Comprising a base; the input unit comprises an input shaft arranged on the base and an input gear arranged on the input shaft, and the input shaft is in transmission connection with the power source; the output unit comprises a first output gear rotationally arranged on the base, a gear set in transmission connection with the first output gear and a second output gear in transmission connection with the gear set, and the second output gear outputs power through an output shaft; the input gear is shifted through shifting of the shifting fork so that the input gear can be in transmission connection with the first output gear, any gear unit and the second output gear. Gear shifting can be achieved by pushing the input gear to transversely move to the corresponding output gear through the shifting fork, gear shifting is smooth, response is rapid, torque is high, the lower output unit is matched with a newly-designed special-shaped gear structure, the structure is simpler and more compact, cost is low, maintenance is convenient, and the service life is long.

The invention discloses a four-shaft built-in transmission inertia reversing taper clutch electric control automatic variable speed electric driving system, which is characterized in that an electric control gear shifting mechanism is mounted at one end of a main shaft, not only can active high and low speed gear shifting and front and back inertia gear shifting based on the Archimedes principle be realized, but also an electric control algorithm is extremely simple; in the active gear shifting process, the taper clutch mechanism can serve as an excellent vibration absorption mechanism, so that the gear shifting process is extremely stable; the motor can always and efficiently work in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, and harmony and unification of people, vehicles, roads and running resistance / running load are realized; the important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved, meanwhile, automatic front and back gear shifting based on inertia of forward and reverse rotation of the motor is achieved, the reverse gear transmission path is very short, and the transmission efficiency is high.

The invention relates to the technical field of gearbox gear shifting control, and discloses a tractor pneumatic control gear engaging device which comprises an upper cover fixedly installed on a gearbox, gear shifting blocks and air cylinder assemblies, the multiple gear shifting blocks are installed in the upper cover in a sliding mode, and the telescopic ends of the air cylinder assemblies are used for pushing and pulling the gear shifting blocks to horizontally move left and right. The air cylinder assembly comprises a cylinder body, a first piston and a second piston are installed on the cylinder body in a sliding mode, and a first air injection hole, a second air injection hole and a third air injection hole are formed in the surface of the cylinder body. According to the pneumatic control gear engaging device, the air cylinder assemblies capable of achieving three-gear positioning are arranged, the air cylinder assemblies can drive the gear shifting blocks to be switched among the high gear, the neutral gear and the low gear, the requirement for controlling the meshing sleeve to slide left and right is met, the multiple air cylinder assemblies control the gear shifting blocks to act independently, a gear selecting air cylinder set is omitted, the overall structure of a gear engaging mechanism is simplified, and the gear engaging device is convenient to use. The size is reduced, the failure rate is reduced, and convenience is provided for later use, maintenance and debugging.

The invention discloses a four-shaft taper clutch type manual control reversing electric control automatic speed change electric driving system which comprises a power motor, a speed change assembly and a two-shaft power output mechanism. The speed change assembly comprises a main shaft, a shaft sleeve, a taper clutch mechanism, an elastic mechanism and a speed reduction shaft assembly; not only can active high and low speed gear shifting and manual control front and back gear shifting be realized, but also an electric control algorithm is extremely simple; in the active gear shifting process, the taper clutch mechanism can serve as an excellent vibration absorption mechanism, gear shifting impact is effectively absorbed, and the gear shifting process is extremely stable; the motor can always and efficiently work in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, and harmony and unification of people, vehicles, roads and running resistance / running load are realized; the important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The invention discloses a five-shaft simple electric control variable speed taper clutch type electric driving system which comprises a power input mechanism, a variable speed assembly and a two-shaft power output mechanism, and the variable speed assembly comprises a main shaft, a speed reduction shaft assembly, a taper clutch mechanism and an elastic mechanism. The system is simple and reliable in structure and excellent in expansibility, can flexibly expand various functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power according to actual requirements, and meets the design requirements of platformization and modularization. Moreover, the motor can always work efficiently in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, harmony and unification of people, vehicles, roads and running resistance / running load are realized, and the driving safety is improved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

This invention discloses a rapid detection device for the planar runout of the end face of medium and large bearings, comprising a base and a turntable. The top wall of the turntable serves as a placement surface, and several slots are evenly distributed along the circumference of the turntable on the placement surface. Each slot is formed from the edge of the turntable towards its center. A clamp is movably mounted in any three slots, arranged in a triangular pattern. Each clamp has an arc-shaped contact surface at its starting end for contacting the outer peripheral wall of the bearing race under test. Each clamp is equipped with a fastening structure for securely connecting the clamp to the corresponding slot and an adjustment structure for adjusting the relative height between the clamp and the turntable to accommodate bearing races of different thicknesses. The base is equipped with a detection element for detecting the planar runout of the bearing race end face. This invention solves the problems of existing bearing planar runout detection equipment, such as complex structure, poor adaptability, easy damage to the bearing surface, inconvenient disassembly and assembly, and low detection efficiency.

The utility model provides a three-gear speed change mechanism and a rear gearbox. The three-gear speed change mechanism comprises a driving shaft, a driven shaft, a speed change plate and a shifting fork assembly. The driving shaft is sequentially provided with a first driving gear, a second driving gear, a first synchronizing ring and an acceleration gear in the axial direction of the driving shaft. The driven shaft is sequentially provided with a first driven gear, a common gear, a second synchronizing ring, a stress application gear and a second driven gear in the axial direction of the driven shaft, and the first driven gear rotates along with the driven shaft and is in transmission connection with the differential input gear. According to the three-gear speed change mechanism, speed change of three gears of common use, force application and acceleration is achieved through cooperation of three different gear sets, enough power output transmission can be provided to meet different use conditions, and meanwhile the speed change plate and the shifting fork assembly are matched, so that gear shifting is smoother, and the driving experience is good.

The utility model relates to the field of printing, in particular to a cleaning device for silk-screen printing. According to an existing cleaning device for silk-screen printing, ink on the surface of a silk-screen frame is difficult to fully scrub, the silk-screen frame is difficult to clamp and fix during cleaning, and ink contained in meshes of the silk-screen frame is difficult to scrub cleanly. A cleaning device for silk-screen printing comprises a table frame, an installation frame, sliding rails and electric sliding blocks, the installation frame is installed on the top of the table frame, the two sliding rails are installed on the upper portion of the installation frame and are symmetrically arranged, and each sliding rail is connected with the corresponding electric sliding block in a sliding mode. The rotating soft brush roller rapidly scrubs ink on the silk screen frame, the electric sliding block drives the straight groove frame to move reversely, the soft brush roller rotates reversely to scrub the silk screen frame for the second time in the process that the straight groove frame moves reversely, and the soft brush roller is used for scrubbing the silk screen frame in a reciprocating mode, so that the ink on the surface of the silk screen frame is more sufficiently scrubbed. And the scrubbing efficiency is improved.

The invention discloses a four-shaft simple electric control variable-speed taper clutch type electric driving system which comprises a power motor, a variable-speed assembly and a two-shaft power output mechanism, the variable-speed assembly comprises a main shaft, a shaft sleeve, a taper clutch mechanism, an elastic mechanism and a speed reduction shaft assembly, the structure is simple and reliable, the expansibility is extremely good, and the power output mechanism is stable and reliable. A plurality of functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power can be flexibly expanded according to actual requirements, and the design requirements of platformization and modularization are met. Moreover, the motor can always work efficiently in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, harmony and unification of people, vehicles, roads and running resistance / running load are realized, and the driving safety is improved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The invention discloses a built-in transmission manual control reversing clutch sheet type electric control automatic speed changing electric driving system which comprises a power motor, a speed changing assembly and a two-shaft power output mechanism, meanwhile, the manual control reversing function is achieved, and the system is simple and reliable. One end of the main shaft is coaxially and fixedly connected with a motor shaft, and the other end of the main shaft is provided with an electric control gear shifting mechanism, so that active high-low speed gear shifting can be realized, and an electric control algorithm is extremely simple; moreover, in the active high-low speed gear shifting process, the frame clutch disc mechanism can be used as an excellent vibration absorption mechanism, so that the gear shifting process is extremely stable; the motor can always and efficiently work in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, and harmony and unification of people, vehicles, roads and running resistance / running load are realized; the important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The present invention discloses a transmission shift fork mechanism, which includes a shift fork assembly and a synchronizer assembly. The shift fork assembly includes a shift fork shaft, a shift fork connecting sleeve and a shift fork; the shift fork of the shift fork assembly is fixedly connected to the shift fork shaft through the shift fork connecting sleeve; the end of the shift fork is sleeved with a metal sleeve; the outer ring side wall of the synchronizer sleeve of the synchronizer assembly is circumferentially provided with a sleeve groove; when working, the shift fork assembly moves, driving the shift fork to move, so that the upper friction surface and the lower friction surface of the metal sleeve contact the upper and lower surfaces of the sleeve groove on the synchronizer sleeve, pushing the synchronizer sleeve to move and shift. The mechanism avoids the functional problems of the transmission hitting teeth and shifting out of gears caused by the shift fork being damaged and causing the synchronizer sleeve shifting stroke to be not in place, thereby improving the shifting quality of the transmission and reducing the production cost.

The invention discloses a gear shifting method based on position correspondence of gear teeth and tooth grooves of a gear shifting gear, which comprises the following steps of: arranging a transmission control unit (TCU) and an actuating mechanism applied to gear shifting, and arranging an inner gear ring with an inner tooth groove to replace a synchronizer; a first position sensor for judging the position of an inner tooth groove of the inner gear ring and a second position sensor for judging the position of combined gear teeth of the combined gear are arranged, and the TCU controls the rotating speed of the first motor to enable the combined gear teeth to be axially aligned with the inner tooth groove and enable the rotating speed of the spline gear to be close to or equal to the rotating speed of the combined gear. And the TCU enables the executing mechanism to push the inner gear ring in the neutral gear state to advance to the combined gear. The gear shifting mechanism has the advantages that gear shifting is smooth, pause and abnormal sound are avoided, and power connection is smooth; the inner gear ring replaces a synchronizer, the structure is simple, and durability is achieved; the information acquisition parts are arranged in a centralized mode, and the arrangement positions do not interfere with wheel shafts and splashing lubricating oil in the gearbox.

A stepless speed change pole transmission type speed changer comprises a driving cone pulley assembly, a driven cone pulley assembly and a transmission steel belt, and the driving cone pulley assembly and the driven cone pulley assembly are each formed by coaxially and fixedly connecting a fixed cone pulley and a movable cone pulley assembly and are connected through the steel belt; the movable cone pulley assembly is composed of an internal gear, a movable cone pulley, a partition plate and a cone pulley support, the cone pulley support is a gear shaft fixedly connected with the fixed cone pulley, the internal gear is a cylindrical gear, first internal teeth meshed with the cone pulley support are arranged on the hole wall of a center hole of the internal gear, and the outer side of one end of the internal gear extends in the axial direction to form an oil cylinder. A partition plate with an oil hole is inserted into the oil cylinder, and the other end of the partition plate is connected with the movable cone pulley. The large-torque transmission device has the beneficial effects that the structure is simple and reasonable, the problem of slipping sometimes during large-torque transmission is effectively solved through the mode that the inner gear and the outer gear are meshed, and the functions of smooth gear shifting and smooth large torque are achieved.

The invention discloses a hydraulic control system suitable for a small-tonnage forklift, a gear shifting method and a gearbox assembly. The system comprises a forward clutch, a backward clutch, an inching valve, a two-way buffer and an electromagnetic reversing valve. The gear shifting oil way sequentially passes through the inching valve and the electromagnetic reversing valve and then enters the forward clutch and the backward clutch. A bidirectional buffer is connected in series to an oil path entering the forward clutch and the backward clutch; the bidirectional buffer comprises a cavity, an elastic piece, a first piston and a second piston, wherein the elastic piece, the first piston and the second piston are located in the cavity. The first piston and the second piston are fixedly connected with the two ends of the elastic piece correspondingly and divide the cavity into an advancing cavity and a retreating cavity. The elastic piece is matched with the first piston and the second piston, so that the first piston and the second piston can slide in the cavity, and power crossing in the gear switching process can be reduced, so that more gentle gear shifting is achieved.

The invention discloses a synchronous regulation and control type bridge swivel construction intelligent control system and a construction method.The system comprises a swivel construction device, a swivel monitoring module and a swivel control module, and the swivel construction device comprises an annular friction disc, a guide supporting device and an annular guide rail arranged on a bridge body support bearing platform; the annular friction disc is coaxially sleeved on the periphery of the axle body support turntable, a friction liner is arranged on the inner wall, and a gear ring is arranged on the outer wall and is driven by an electric driving device; the guide supporting device is arranged at the bottom of the annular friction disc, the lower end of the guide supporting device can slide along the annular guide rail, the rotation monitoring module monitors the rotating speed of the annular friction disc and the rotating disc in real time, and the rotation control module regulates and controls the electric driving device according to the obtained rotating speed. Uniform bearing and low-friction driving are combined through the annular friction disc, synchronous and accurate regulation and control of the rotating speed of the bridge body are achieved through PLC intelligent control, and the problems of dynamic balance keeping, posture real-time and accurate control and the like of large-tonnage bridge body rotating construction are effectively solved.

The fitness riding electric tricycle comprises a front tricycle frame, a rear tricycle frame, a handle rod, a front fork wheel rod, a bottom supporting frame, a cushion, rear wheels, a damping rod, a storage battery and a universal rotating assembly, a disassembling assembly is installed between the front tricycle frame and the rear tricycle frame, a cushion supporting rod is installed on the rear tricycle frame and connected with a cushion connecting rod, and the cushion connecting rod is connected with the rear tricycle frame. A seat cushion is fixed on a seat cushion connecting rod, a locking buckle is installed on the left side of the seat cushion connecting rod, an armrest telescopic folding assembly is installed on the seat cushion connecting rod, supporting sleeves are fixed on the front side and the rear side of the bottom supporting frame, a rear wheel rotating shaft is connected in the supporting sleeves, and a rear wheel is connected with the front end and the rear end of the rear wheel rotating shaft. The bottom supporting frame is provided with a pedal flying disc, a driving motor and a variable-speed hub, a chain is connected among the pedal flying disc, the driving motor, the differential mechanism and the variable-speed hub in a sleeving mode, and the foldable electric bicycle has the advantages of being simple in structure, foldable, more convenient to adjust and use and higher in comfort and stability.

The invention discloses a four-shaft simple electric control speed change clutch sheet type electric driving system, which comprises a power motor, a speed change assembly and a two-shaft power output mechanism, the speed change assembly comprises a main shaft, a shaft sleeve, a frame clutch sheet mechanism, an elastic mechanism and a speed reduction shaft assembly, the structure is simple and reliable, the expansibility is excellent, and the speed reduction shaft assembly is stable and reliable. A plurality of functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power can be flexibly expanded according to actual requirements, and the design requirements of platformization and modularization are met. Moreover, the motor can always work efficiently in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is realized, harmony and unification of people, vehicles, roads and running resistance / running load are realized, and the driving safety is improved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The present invention discloses a subway cover inverted excavation structure and a construction method thereof. The subway cover inverted excavation structure includes a support pile, a support plate is fixedly connected to the top of the support pile, a fixing hole is provided on the surface of the support plate, a connecting piece is threadedly connected to the inner wall of the fixing hole, the surface of the connecting piece is threadedly connected to the inner cavity of the top plate, a sand outlet is provided on the surface of the top plate, a guardrail is fixedly connected to the top of the top plate, and a first connecting plate is bolted to the surface of the support pile. The present invention provides a connecting piece to make the connection between the support pile and the top plate more stable, so that the support pile does not tilt or misalign when in use; the present invention increases the support contact area of ​​the top plate, thereby increasing the support load of the top plate, strengthening the load capacity of the entire reinforcement system, and providing sufficient support force to ensure construction safety even if there is large machinery operating above the top plate.

The utility model provides a gearbox gear, which relates to the field of gears, and comprises a gear body, gear teeth distributed on the circumference of the excircle surface of the gear body at equal angles, and a tooth groove between every two adjacent gear teeth. A first annular groove is formed in the end face of one side of the gear body, a baffle is elastically connected to the first annular groove, a plurality of springs are arranged at the bottoms of the baffle and the first annular groove, a bearing hole is formed in the center of the gear body, and the center lines of the bearing hole, the dog tooth shaft and the gear tooth body coincide. The first annular groove is formed in the end face of the side, close to the dog teeth, of the gear body, the baffle is elastically connected into the first annular groove, and in the process that the gear shifting fork is manually shifted to drive the sleeve to be meshed with the dog teeth, axial force of the sleeve to the gear is reduced, and the stability of the gear is protected.

The invention provides a variable speed control device and a bicycle. The variable speed control device comprises a main body and a variable speed operation unit, a speed change positioning component arranged on the speed change operation unit can selectively maintain the winding component at a first output position, a second output position or a third output position; a pushing piece of the variable-speed positioning component is in linkage fit with the operating component, and correspondingly provides power for movably switching the coiling component at any output position in the first direction; the locking piece can allow the winding component to move in a one-way intermittent mode and limit the winding component to the output position driven by the pushing piece. The unlocking piece directly controls the locking piece so as to release the limitation on the coiling component; when the unlocking piece is controlled to trigger the locking piece to release limiting, the winding component can correspondingly reset and rotate to a first output position in a self-adaptive manner; therefore, the speed change control is simplified, the speed change system can be automatically reset after the lock is unlocked, and the convenience of user operation is improved.

The utility model relates to an air supply device, in particular to an air supply device for tunnel construction. The utility model provides an air supply device with shifting and fixing functions for tunnel construction, which comprises a mounting rack, a shell, fan blades, a motor and the like, the mounting rack is connected with the shell, the motor is mounted in the shell, and the front end of an output shaft of the motor is connected with the fan blades through a coupler. The support is rotated to move oppositely to be connected with the mounting frame in a clamped mode, the device is straightened, the shell is pushed to drive the universal wheels to move on the ground to achieve displacement, a steel rope penetrates through the mounting frame, suspension equipment is operated to lift the device upwards, a plurality of screws correspond to corresponding threaded holes in the mounting frame, and therefore the device can be fixedly mounted. And the motor is started and can drive the fan blades to rotate to supply air to the tunnel.

The utility model discloses a tracked robot gearbox which comprises a box body, a power input shaft, a left power output shaft, a right power output shaft, a middle shaft, a gear shifting shaft, a left variable speed shaft and a right variable speed shaft are arranged in the box body, and a left planetary reducer and a right planetary reducer are arranged on the left variable speed shaft and the right variable speed shaft respectively. A steering shaft for receiving the torque of the steering motor and a reverse shaft for reversely outputting the torque of the steering shaft are also arranged in the box body, and a steering gear for transmitting the torque to the left planetary reducer or the right planetary reducer is arranged on each of the steering shaft and the reverse shaft; the left variable-speed shaft and the right variable-speed shaft are sleeved with a left steering control gear and a right steering control gear respectively, and the planet carrier transmits torque to the left power output shaft and the right power output shaft respectively. According to the tracked robot gearbox, in the steering process of a robot, power is continuously output to crawlers on the two sides, power of the crawlers on one side cannot be cut off, and the robot steers stably and is good in continuity and high in steering precision.

The invention discloses a six-shaft simple electric control speed change taper clutch type electric driving system which comprises a power input mechanism, a speed change assembly and a two-shaft power output mechanism, and the speed change assembly comprises a main shaft, a speed reduction shaft assembly, a reverse gear shaft mechanism, a taper clutch mechanism and an elastic mechanism. The power input shaft, the speed reduction shaft assembly, the reverse gear shaft mechanism and the two-shaft power output mechanism are arranged on the periphery of the main shaft in the circumferential direction. And the structure is simple and reliable, the expansibility is excellent, and various functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power can be flexibly expanded according to actual requirements. The motor can always and efficiently keep working in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is achieved, and harmony and unification of people, vehicles, roads and running resistance / running loads are achieved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.