114results about How to "Improve handling" patented technology

The utility model relates to the technical field of tires, and provides a super high performance car tire, comprising: a carcass; a plurality of longitudinal main drainage grooves are arranged on the tread of the carcass; the inner side of the tread of the carcass has an inner tread pattern area, and the outer side has an outer tread pattern area; a plurality of first auxiliary drainage grooves and a plurality of second auxiliary drainage grooves are alternately arranged on the inner tread pattern area; a knife groove is also arranged between adjacent first auxiliary drainage grooves and second auxiliary drainage grooves; a plurality of third auxiliary drainage grooves and a plurality of fourth auxiliary drainage grooves are alternately arranged on the outer tread pattern area. The utility model can improve the dry and wet grip and drainage performance, reduce the risk of hydroplaning, and improve the wet driving safety and driving comfort.

This utility model discloses a tire lifting frame, relating to the field of tire changing machine technology. It includes a fixed base, a lifting mechanism, a guiding mechanism, a lifting frame, a tire flipping frame, and a flipping controller. The fixed base is installed on one side of the clamping plate assembly of the tire changing machine, and the lifting mechanism is fixed thereon. The guiding mechanism includes a sliding block and a sliding guide plate. The sliding block has a guide groove, and the sliding guide plate slides vertically within the groove. Its upper end is connected to the lifting frame, which is fixed to the lifting end of the lifting mechanism, enabling vertical movement. The tire flipping frame is located outside the lifting frame and rotates around an axis with the lifting frame via a rotating connection. A tire can be placed at its first end. The flipping controller consists of an outer tube and an inner tube. The outer tube is fixed to the base and has a limiting groove, in which the inner tube slides. Its upper limit pin slides along the groove, and the flipping control pin at the upper end of the inner tube engages with the groove at the second end of the tire flipping frame, enabling the tire flipping frame to flip and move. This design assists in tire handling, reducing labor intensity and safety risks for workers.

The utility model relates to medical instrument technical field, concretely is a kind of superhard guide wire, including mandrel, Tip head, first spring, second spring, first coating, second coating;The distal end of mandrel is provided with transition section and shaping section;Tip head is connected in the end of shaping section;First spring is sleeved on shaping section;Second spring is sleeved outside first spring, and one end extends to transition section, and second spring is provided with multiple connecting areas;The one coating is coated in second spring and the distal end of mandrel;Second coating is coated in Tip head and first coating outside, and extends to the distal end of mandrel.This embodiment's superhard guide wire, multiple connecting areas are provided on second spring, and the flexibility of multiple connecting areas can improve second spring, so that it can have better anti-unraveling capacity, to avoid stress concentration on first coating and second coating when mandrel is used, reduce the risk that coating is pulled apart and falls off, improve the controllability and safety of guide wire in surgical process.

The utility model discloses a speed changer of toy car, including speed changer body and drive arrangement, speed changer body includes driving rod, conversion subassembly, first gear train subassembly and second gear train subassembly, first gear train subassembly, conversion subassembly and second gear train subassembly are sequentially inserted on driving rod, the output of drive arrangement is connected with the input of driving rod, wherein, when first gear train subassembly is connected with conversion subassembly, driving rod drives first gear train subassembly to rotate, and first gear train subassembly is connected first output through first drive link, and speed changer is in acceleration state, when second gear train subassembly is connected with conversion subassembly, driving rod drives second gear train subassembly to rotate, and second gear train subassembly is connected second output through second drive link, and speed changer is in deceleration state. Children observe the rotation and switching process of gear intuitively in playing. Cultivate their interest in science and technology in the form of play.

The utility model belongs to the technical field of motorcycle frames, and particularly relates to a high-performance motor tricycle frame structure. The vehicle frame comprises a main vehicle frame, the main vehicle frame comprises a main vehicle frame body, a rear vehicle frame body and a connecting mechanism, the main vehicle frame body and the rear vehicle frame body are detachably connected through the connecting mechanism, the main vehicle frame body comprises a front cross beam, a rear cross beam, two front longitudinal beams and a vehicle head mounting base, and the two front longitudinal beams are arranged in parallel; the front cross beam and the rear cross beam are respectively connected with the front ends and the rear ends of the two front longitudinal beams to form a rectangular frame structure, the middle part of the front cross beam is provided with a headstock mounting seat for mounting a headstock assembly, the rear frame comprises two rear longitudinal beams, and the rear longitudinal beams are of trapezoidal structures. By adopting the design that the main frame and the rear frame are detachably connected and arranging the buffering assembly, the problems that a traditional integral frame is large in rigidity, poor in riding comfort and high in maintenance cost are effectively solved.

The embodiment of the invention relates to the related technical field of vehicles, and discloses a torque distribution method, device and equipment of a distributed driving system, an automobile and a storage medium, a first shaft of the distributed driving system is driven by a single motor in a centralized mode, a second shaft is driven by double motors in a distributed mode, and the first shaft is a front shaft or a rear shaft; the method comprises the steps that torque distribution processing is carried out according to the expected yawing torque and the longitudinal target torque of the vehicle, and the first distribution torque and the second distribution torque of each driving motor are determined; and performing fusion processing on the first distribution torque and the second distribution torque of the driving motor, and determining a target torque of the driving motor. By means of the technical scheme, the problem that torque distribution in a distributed driving system is not reasonable enough in the prior art can be solved.

The utility model discloses a protection device for fruit carrying in an orchard, and particularly relates to the technical field of fruit carrying, the protection device comprises two first longitudinal frames and two second longitudinal frames, the two first longitudinal frames are symmetrically distributed, and the two second longitudinal frames are symmetrically distributed; first connecting rods are arranged between the two first longitudinal frames, first connecting rods are arranged between the two second longitudinal frames, second connecting rods are arranged between the first longitudinal frames and the second longitudinal frames on the same side, and supporting bottom frames are fixedly installed between the first connecting rods and the second connecting rods. The first guiding and protecting piece and the second guiding and protecting piece can be conveniently overturned to be in an inclined state, so that the first guiding and protecting piece and the second guiding and protecting piece form a slope surface, the storage basket can be conveniently pushed to move through a plurality of rolling sleeves rolling on the first guiding and protecting piece and the second guiding and protecting piece, the storage basket is easily transported to the supporting bottom frame, and the storage basket is easily carried.

This utility model relates to the field of prefabricated buildings and discloses a lightweight partition wall panel positioning fixture for prefabricated buildings. It includes a base plate with a movable component at its bottom. Two support columns are fixedly connected to the top of the base plate, and a support component is provided on one side of each support column. A connecting plate is fixedly connected between the two support columns. A sliding component is provided at the bottom of the connecting plate. The sliding component includes a lower slide rail, an upper slide rail, an upper slider, and a lower slider. The bottom of the lower slide rail is fixedly connected to the top of the base plate, and the top of the upper slide rail is fixedly connected to the bottom of the connecting plate. The inner wall of the upper slider is slidably connected to the outer wall of the upper slide rail. This utility model, through its slide rail feeding structure, achieves the effect of easy handling and installation of partition walls by a single person during equipment use, solving the problems of conventional handling methods being not only dangerous but also requiring multiple people to handle, thus improving efficiency.

The utility model discloses a new energy heavy truck chassis and a vehicle, and relates to the technical field of vehicles. The new energy heavy truck chassis comprises a frame, a cabin frame, an energy storage module and a driving system, the cabin frame, the energy storage module and the driving system are arranged on the frame and are sequentially arranged in the direction from a truck head to a truck tail, and the energy storage module comprises a battery frame, a first battery layer and a second battery layer, the first battery layer is located above the second battery layer, the first battery layer comprises a plurality of longitudinal battery blocks, the second battery layer comprises a plurality of transverse battery blocks, the longitudinal battery blocks extend in the direction from the vehicle head to the vehicle tail, and the first battery layer and the vehicle frame are located on the same level. The loading electric quantity can be improved, the whole vehicle layout is optimized, and the assembling efficiency is improved.

The utility model provides an intravascular thrombus aspiration catheter. The intravascular thrombus aspiration catheter comprises an internal flow channel, a far-end aspiration catheter section, a middle catheter section and a near-end driving catheter section, and the internal flow channel is sequentially communicated with the far-end aspiration catheter section, the middle catheter section and the near-end driving catheter section from the far end of the intravascular thrombus aspiration catheter to the near end of the intravascular thrombus aspiration catheter. Wherein the intravascular thrombus aspiration catheter further comprises an aspiration inlet and an outflow window, and the internal flow channel is communicated with the aspiration inlet and the outflow window; a filter screen is arranged in an inner flow channel of the middle guide pipe section and is positioned between the suction inlet and the outflow window; at least one of the far-end suction catheter section, the middle catheter section and the near-end driving catheter section is detachably connected, and the suction inlet is formed in the far-end suction catheter section. According to the intravascular thrombus aspiration catheter provided by the invention, due to the segmented detachable design, the use convenience is facilitated.

The application relates to a bidirectional adjusting control valve structure and belongs to the technical field of engineering mechanical equipment. The control valve comprises a main valve rod, a valve core and adjusting screw No. 2; one end of the main valve rod is provided with adjusting screw No. 2; the middle part of the main valve rod is vertically provided with the valve core; the other end of the main valve rod is provided with an adjusting mechanism for ensuring that the output flow of front and rear tandem pumps is consistent when the vehicle is in reverse; and the adjusting mechanism is arranged in the axial direction of the main valve rod. The control valve provided by the application can not only adjust the coincidence of the output flow of the plunger pump when moving forward, but also adjust the coincidence of the output flow of the plunger pump when moving backward, so that the machine control performance is optimized and the product performance is improved.

The utility model relates to a high-strength light-weight vehicle cellular board which comprises a top layer cellular hole, a bottom layer cellular hole and a middle cellular hole, the top layer cellular hole, the bottom layer cellular hole and the middle cellular hole form a cellular hole unit, and peripheral holes incline towards a central hole at the same curvature. Through the unique honeycomb hole structure design, stress is effectively dispersed, the strength is improved, meanwhile, the weight is reduced, and the problem that the strength and the light weight of an existing vehicle honeycomb plate are difficult to balance is solved. Honeycomb holes are of a hexagonal structure and are tightly arranged to form a honeycomb shape, material consumption is reduced, and light weight is achieved. Connecting edges are arranged at the tops and the bottoms of the top-layer honeycomb holes and the bottom-layer honeycomb holes and used for being connected with other parts, the connecting edges and the honeycomb holes are connected through reinforcing ribs, and the edge strength is enhanced. Edge sealing structures are arranged on the side faces of the cellular board, internal cellular holes are prevented from being damaged, and connecting holes are formed in the edge sealing structures and used for being fixedly connected with other parts. The cellular board is made of high-strength aluminum alloy.

This invention relates to the field of motor technology and discloses a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs). The motor includes a stator with a winding section and a frequency conversion section. The winding section is arranged in a ring array around the center of the stator, allowing for different coil combinations on a single winding. The winding section includes slots A, B, and C. Slot A is located on the inner wall of the stator, while slots B and C are located on the stator itself. The inner wall of the stator also has inlet holes A, B, and C. Inlet holes A and B communicate with slot A, and inlet holes B and B communicate with slot B. The motor employs a wide-range speed control to adapt to UAV operating conditions, featuring a six-speed adjustment function. The rated speed ranges from 8 r / min (8 Hz) to 48 r / min (48 Hz), and the speed ratio can reach 1:8 during weak field operation. This allows for precise matching of the power requirements of different stages of UAV operation, such as takeoff, cruise, and high-speed flight, achieving full operating condition coverage without motor replacement.

The utility model discloses an anti-corrosion protection tube which comprises a protection tube body. The protection pipe is composed of a straight pipe and a corrugated pipe, the two ends of the corrugated pipe are fixedly installed on one side of the straight pipe through bolts, a fixing buckle is installed on the upper side of the straight pipe, an installation frame is installed at the upper end of the fixing buckle, the installation frame is composed of a threaded cylinder and a threaded rod, and the upper end of the threaded rod is rotatably installed in the threaded cylinder. The bottom end of the threaded rod is installed at the upper end of the fixing buckle, the straight pipe is composed of a base pipe layer and a corrosion-resistant layer, and the corrosion-resistant layer is attached to the outer side of the base pipe layer. When the mounting rack is used, the threaded rod rotatably enters or rotatably extends out of the threaded cylinder, the length of the mounting rack can be adjusted, and the corrugated pipe is arranged to facilitate bending, so that a protection pipe can be conveniently bent according to the routing of a cable.

This utility model provides a material handling vehicle, including a base frame with casters installed at the bottom. Slots are provided on both sides of the base frame, into which a support frame is inserted. Locking bolts for fixing the support frame are threaded onto both sides of the base frame. A first sleeve is installed at the top center of the support frame, and a handle is inserted into the first sleeve. A first fixing bolt for fixing the handle is threaded onto the top of the first sleeve. A hanging assembly is fitted onto the surface of the handle. This handling vehicle has a simple structure and small size, making it convenient for material handling operations in confined spaces. It can rotate a support frame of appropriate size according to the construction space, and then hang materials via the hanging assembly and a second hook. Workers can hold the handle and use leverage to push the handling vehicle, thus easily transporting barrelled materials to confined construction sites. Furthermore, this handling vehicle is easy to disassemble and carry.

This utility model provides a lamp tube storage and collection device, relating to the field of lamp tube storage and collection technology. It aims to solve the problems of poor protection of lamp tubes in existing lamp tube collection and collection devices, resulting in easily damaged lamp tubes and affecting their later use. The device includes a workbench with casters evenly distributed on its bottom. Bases are evenly distributed on the workbench, and lamp tubes are placed on the bases. A cover plate is movably connected to the bases, and the shapes of the cover plate and the inner walls of the bases are matched to the shape of the lamp tubes. A rod is installed at the bottom of the cover plate, and a groove is provided on the bases, with the rod fitting into the groove.

This invention provides an AUV multi-thrust propulsion system, comprising stabilizers, auxiliary rim thrusters, an AUV stern body, main rim thrusters, fairings, connecting discs, and a tail-mounted connecting frame. The main rim thrusters are fixedly connected to the rear end of the AUV stern body via the connecting discs. The fairings are positioned behind the blades of the main rim thrusters. The four auxiliary rim thrusters are uniformly fixed in a cross shape around the circumference of the AUV stern body. The four stabilizers are arranged in an X-shape on the stern body, staggered and evenly spaced with the four auxiliary rim thrusters. The advantages of this invention are increased maneuverability and controllability while reducing the complexity of the drive mechanism, saving stern space, and increasing the power, maneuverability, and system redundancy of the propulsion system by using multiple rim thrusters, thereby improving the safety, stability, controllability, and mission execution efficiency of the AUV in complex underwater environments.

The utility model discloses a linear motor coil back structure applied to automobile suspension belongs to linear motor technical field, including the magnetic yoke board, the inside middle of magnetic yoke board is provided with the core, and the side of core is provided with a plurality of coils, and is provided with permanent magnet between two groups of coils, the utility model discloses a package to magnetic yoke board is carried out by adopting epoxy potting, improves the reliability of motor use, and the sealing and protection structure effectively prevent the erosion of dust, moisture and other impurities to motor, reduce motor failure risk, at the same time, the reasonable structure design has improved the wear resistance and the impact resistance of motor, reduced maintenance cost, and single group coil back -to -back installation is arranged in the circumferential direction array, promotes motor performance, increases the output force and electromagnetic efficiency, makes the suspension system can be more fast, accurately responds the road surface change, realizes the accurate control of vehicle height optimization the performance of suspension under different road conditions, improves the ride comfort and the control performance.

The utility model belongs to tire technical field, concretely relates to a kind of non-pneumatic tire for passenger car, including tread layer, buffer support body and rim, the tread layer includes tread ring base rubber layer, the outer surface of tread ring base rubber layer is tread pattern, and the inner of tread ring base rubber layer is provided with tread ring framework;The first layer tread ring framework, the second layer tread ring framework are sequentially composed by the inner of the tread ring framework along tire ground side, and the tread ring framework is made of nylon cord material, the included angle of the first layer tread ring framework and tire circumferential direction is 23-25 °, and the included angle of the second layer tread ring framework and tire circumferential direction is 15-17 °.By optimizing the structure and material of non-pneumatic tire, it needs to have good shock-absorbing performance, handling performance and lightweight design, suitable for passenger car;It has the same supporting capacity and buffering performance as pneumatic tire, completely solves the problem of tire burst of pneumatic tire, avoids traffic accident.

The utility model provides a control handle assembly with damping, which comprises a handle push rod, a base and a support, a handle grip is arranged at the upper end of the handle push rod, the lower end of the handle push rod is rotatably connected with the base through a first rotating shaft, and a damper is further arranged between the lower end of the handle push rod and the base. The handle push rod can overcome the resistance of the damper under the action of external force to rotate around the first rotating shaft relative to the base; the base is rotationally connected with the bracket through a second rotating shaft; the first rotating shaft and the second rotating shaft are horizontally arranged and are perpendicular to each other. By means of the damper between the lower end of the handle push rod and the base, the rotation amount of the handle push rod around the first rotating shaft can be fed back to the handle push rod in a resistance mode, an operator can judge the operation stroke conveniently, and the operation comfort is improved; the resistance of the damper can bear vibration and external force impact, and the control performance and stability are improved.

This utility model discloses an adjustable-height garden pruning shears, specifically relating to the field of garden craft equipment technology. It includes two shear heads, with a positioning shaft rotatably connected to the inner side of each shear head. A serrated edge is formed on one side of each shear head, and a connecting plate is fixedly connected to one side of each shear head. A second connecting plate is located on the outer side of the first connecting plate, and a telescopic mechanism is provided on one side of the second connecting plate. The telescopic mechanism includes a handle. This utility model utilizes a built-in transmission rod for deflection transmission, ensuring that the locking and unlocking of the second handle is protected by the first handle, making the locking of the first and second handles more secure and less prone to loosening, and improving the safety of the telescopic locking. The deflection positioning of the second and first connecting plates allows adjustment of the positioning angle between the shear heads and the first and second handles, enabling users to adjust to the most comfortable and effortless cutting angle according to their own conditions. This optimizes the lever-based force-saving principle, finding the best balance between ease of operation and cutting force, thus improving the control effect.

The invention discloses a suspension angle module, a chassis structure, a new energy vehicle and a control method.The suspension angle module comprises a lower swing arm mechanism and a steering seat, the front end of the lower swing arm mechanism is connected with the bottom of the steering seat through a ball head structure, and a hub and a tire are installed at the center of the steering seat through bearing parts; the rear end of the lower swing arm mechanism is rotationally connected with the vehicle body through a bearing piece, and the steering base can swing up and down relative to the vehicle body in the mode that the lower swing arm mechanism serves as a swing arm. A front arm is arranged on the steering base in the direction of a vehicle head, the front end of the front arm is connected with the steering base through a ball head structure, a front arm adjusting component is arranged at the rear end of the front arm, the front arm adjusting component can adjust the in-out stroke of the front arm, and the direction angle adjusting operation of the steering base and wheels is achieved.

The present application relates to a kind of container spreader control system, including whole vehicle controller and spreader controller.Whole vehicle controller input connection lock switch, unlock switch and handle.Spread controller is connected with whole vehicle controller signal, and its input connection box access switch, lock access switch, unlock access switch, extension access buffer switch, contraction access buffer switch, and its output connection lock electromagnetic valve, unlock electromagnetic valve, extension electromagnetic valve, contraction electromagnetic valve, left side shift electromagnetic valve, right side shift electromagnetic valve.The present application cancels the control scheme of existing relay hard link, uses domestic whole vehicle controller and spreader controller and passes through CAN communication transmission signal mode, completes the functions such as container spreader's box, lock, unlock, extension, contraction, left and right side shift, left and right lateral inclination, front and back inclination, counterclockwise rotation, clockwise rotation, rotation deceleration stop, high-speed rotation, leveling function and intelligent limit angle function, and enriches the functionality of spreader system.

The utility model discloses a kind of pilot handle valves with switchable oil circuit, including driving handle, upper valve body and lower valve body, rotary oil circuit switching piece is equipped between the lower valve body and upper valve body, lower valve body is connected with upper valve body by rotary oil circuit switching piece;The rotary oil circuit switching piece includes core shaft and rotary body with rotary sleeve of core shaft, rotary body is connected with lower valve body, upper end oil port corresponding with channel arranged in upper valve body is equipped on the core shaft upper end face, lower end oil port corresponding with channel arranged in lower valve body is equipped on the lower end face, four oil tanks for making upper end oil port and lower end oil port two two intercommunication are equipped on the rotary body.The utility model is equipped with the rotary oil circuit switching piece of core shaft and rotary body, realizes that product can be disassembled, improves maintainability, reduces use cost, integrates oil circuit switching function, reduces the number of whole machine system components.

The embodiment of the invention provides a vehicle control method and system, a vehicle and a computer readable storage medium, and relates to the technical field of vehicle steering control. The method comprises the following steps: acquiring a vehicle state data set of a target vehicle; based on a first sub-data set in the vehicle state data set, determining a road adhesion coefficient of the target vehicle, the road adhesion coefficient being used for representing friction coefficients between a plurality of wheels of the target vehicle and the road; according to the road adhesion coefficient, a target rear wheel steering mode of the target vehicle is determined, and the target rear wheel steering mode is used for representing a vehicle driving mode matched with the road adhesion coefficient; determining a target rear wheel steering angle corresponding to the target rear wheel steering mode based on a second sub-data set in the vehicle state data set; and controlling the target vehicle to steer according to the target rear wheel steering angle. The technical problem of how to adaptively adjust the steering angle of the rear wheel of the vehicle so as to ensure the control stability and the driving safety of the vehicle is solved.

The application discloses a spring-over double wishbone suspension structure based on a corner module, which comprises a steering knuckle connected with a wheel hub on one side; a connecting corner matched with the steering knuckle, the steering knuckle and the connecting corner having coaxial through holes; a driving mechanism, an output end of which is provided with an angular contact bearing, the Z-direction freedom of the angular contact bearing being limited through the steering knuckle and the connecting corner; an air spring installed above the connecting corner; an upper cross arm arranged in the middle of the connecting corner; and a lower cross arm connected with the steering knuckle through a ball hinge. The air spring is arranged above, and the angular contact bearing is designed, so that the stress of the spring can be effectively shared, the stability and responsiveness of the suspension system are improved, the impact caused by the uneven road surface can be more efficiently absorbed, especially when steering and emergency braking, the suspension system can show better control ability, the body roll and shaking are reduced, and the vehicle is more stable and stable when running at high speed and in complex road conditions.

The invention relates to an exhaust brake electromagnetic valve. According to the electromagnetic valve, a main gas circuit unit, a proportional electromagnetic driving structure, a gas circuit switching structure and a gas pressure detection structure are integrated. Continuous and linear accurate adjustment of output air pressure is realized through a proportional electromagnetic driving structure; the gas path switching structure can intelligently switch gas flow between the first gas outlet and the second gas outlet according to an instruction; the pressure sensor integrated in the valve body monitors the actual output air pressure in real time, closed-loop feedback control is formed, and accurate matching of braking force is ensured. The system is compact in structure, remarkably reduces external pipelines and leakage points, has the advantages of being rapid in response, accurate in control, high in reliability and high in adaptability, and remarkably improves the smoothness and safety of vehicle braking.

The utility model provides an adjustable suspension device of a racing car. The adjustable suspension device of the racing car comprises a frame, two sides of the frame are rotatably connected with suspensions, one end of each suspension is rotatably connected with a jig frame, one end of each jig frame is fixedly connected with a tire, the middle of each jig frame is rotatably connected with a first ball, the outer wall of each first ball is fixedly connected with a connecting rod, and the other end of each connecting rod is fixedly connected with the other first ball. A mounting ring is rotationally connected to the outer wall of the other first ball, one side of the mounting ring is fixedly connected to the middle of one side of the frame, an adjusting assembly is fixedly connected to the top of the jig frame, the other end of the adjusting assembly is fixedly connected to the top of one side of the frame, and damping assemblies are arranged on one sides of the two suspension frames; the adjustable suspension device of the racing car has the advantages that the jig frame (namely the wheel support) can flexibly rotate in multiple directions through the first balls and the connecting rods, so that wheels can better adapt to uneven road surfaces, and the stability and comfort of the car during running are improved.

The utility model relates to the technical field of bicycles, and discloses an inverted suspension fork structure which comprises a connecting column, a connecting frame is fixedly connected to the outer portion of the connecting column, a combined frame is fixedly connected to the bottom of the connecting column, an actuating inner pipe is fixedly connected to the bottoms of two fixing rings, and the actuating inner pipe is fixedly connected to the outer portion of the connecting column. The outer portion of the actuating inner pipe is fixedly connected with a fixing assembly used for fixing, the bottom of the actuating inner pipe is fixedly connected with a connecting assembly used for connecting, the connecting assembly comprises connecting blocks, the bottoms of the connecting blocks are fixedly connected with rotation stopping pieces, and the rear sides of the outer portions of the two connecting blocks are rotationally connected with a supporting frame. According to the utility model, the speed can be quickly sensed from the bottom through the connecting block, the design can reflect the speed at the first time, and the quick feedback mechanism ensures that the system can make instant response to the speed change, so that the riding controllability is enhanced, and meanwhile, the delay can be better reduced.