51results about How to "Guaranteed connection stiffness" patented technology

The present invention discloses a construction method in which a steel box girder is hung on a girder bottom to be transported and is assembled by cantilevers. The construction method includes the following steps: a track is arranged on the bottom of a steel box girder; below the steel box girder, a hydraulic creeping formwork mechanism arranged under the steel box girder is utilized to transport a steel box girder to be assembled; and meanwhile, triangular hanging frames are adopted to change hanging points. The present invention provides the method for assembling the steel box girders of a low-cost bridge, which is generally used for the construction of bridges in wide and shallow rivers without navigation conditions and mountainous areas as well as the construction of bridges in rivers with ordinary navigation conditions, and the efficiency of the whole construction process is high.

The invention relates to an inserting type modular steel structure connecting joint with a reset function. The inserting type modular steel structure connecting joint comprises a modular steel structure connecting joint body and self-reset haunch supports, wherein the modular steel structure connecting joint body comprises two upper module units, two lower module units, a cross-shaped inserting pin connecting piece, a vertical cover plate, a horizontal cover plate and high-strength bolts, and the four self-reset haunch supports internally provided with disc springs are symmetrically arranged at the corner parts of the joint body and are hinged to module beam columns. According to the inserting type modular steel structure connecting joint, module units are connected through the cross-shaped inserting pin connecting piece, the cover plate and the high-strength bolts, so that it is guaranteed that the joint has enough tensile strength, shear strength and bending strength, a connecting device has no need occupying the use space of a building, the application range is wide, and meanwhile attractiveness is guaranteed; and the arrangement of the self-reset haunch supports can improve thebearing capacity of the joint, delay degradation of the rigidity and strength of the joint, reduce damage to the joint beam-column intersection, avoid premature damage to components, achieve rapid repair and guarantee stability and reliability of the joint performance, and residual deformation after an earthquake is small.

The invention relates to the field of building structure seismic resistance and energy-dissipation seismic-mitigation control, in particular to an energy-dissipation and seismic-mitigation oblique prestress shear wall structural system suitable for prefabrication and assembly construction. The structural system includes a prefabricated shear wall, a prestressed inhaul cable, a prefabricated frame column, turning angle constraint connection pieces and an energy-dissipation component; corrugated hoses are embedded in the prefabricated shear wall and internally provided with the prestressed inhaul cable, the four corners of the prefabricated shear wall are provided with the turning angle constraint connection pieces, and the turning angle constraint connection pieces are connected with the energy-dissipation component. The structural system has the advantages that the overall deformation of an upper wall body and the overall deformation of a lower wall body are consistent, a whole control structure is laterally displaced, at the same time, the shear wall structure has a certain self-resetting ability, the overall deformation helps energy-dissipation steel plates give full play to energy dissipations characteristics, a single weak link does not appear, the assembly efficiency of the overall structure is improved, site construction is convenient to achieve, the construction period is effectively shortened, and the cost is saved.

The invention relates to a long-span multi-section combined truss roof structural system and a construction method thereof. The structural system comprises structural columns and a roof truss, whereinthe structural columns include middle columns and side columns; the roof truss comprises main trusses and secondary main trusses, the main trusses comprise side main trusses and side main trusses, the main trusses are formed by splicing main truss units, and the head end surface and tail end surface of the main truss units are oblique end surfaces and are parallel to each other; and column connecting brackets which used for connecting the roof truss and are adapted to components of the corresponding roof truss are arranged in node regions of the structural columns. According to the construction method, the roof truss and the structural columns are sectionally lifted by virtue of the cooperation with a temporary reinforcing measure. Under the condition that the construction stress is met,the structural system is improved, the construction procedure is optimized, the construction cost is saved, the mounting efficiency is improved, and the measure cost is saved.

The invention belongs to the technical field of control plane control of aircrafts, and particularly discloses an electric steering engine. A shell and an end cover form a cavity, a steering machine output shaft is arranged in the cavity and comprises a steel wheel and a first output shaft positioned in the steel wheel, the steel wheel is positioned in the end cover, one end of the first output shaft is positioned in the shell, the other end of the first output shaft is positioned in the end cover, a harmonic cam is sleeved between one end of the first output shaft and the steel wheel, an input rigid wheel is sleeved on the harmonic cam, a second bevel gear is also sleeved on the steel wheel, the side wall of the second bevel gear is in fit with the side wall of the harmonic cam, the second bevel gear is fixedly connected with the harmonic cam, a motor output shaft is positioned in the shell, the first bevel gear is sleeved outside the motor output shaft, the second bevel gear is meshed with the first bevel gear through a gear, and a potentiometer output shaft of a feedback potentiometer is nested in the first output shaft. According to the steering machine, the connection rigidity can be ensured when the flexible connection is realized, and the reliability of the steering machine and the dynamic response of a steering machine system are improved.

The invention relates to a fender mounting structure which comprises a front hub strengthening beam, a fender and a fender support. The fender support is positioned between the front hub strengthening beam and the fender, is connected with the front end of the front hub strengthening beam and is used for supporting the fender. The fender mounting structure is characterized by further comprising a headlamp transverse beam and a front upper component assembly; one end of the headlamp transverse beam is connected with the fender support, and the front upper component assembly is connected with the other end of the headlamp transverse beam. The fender mounting structure has the advantages that certain impact toughness can be guaranteed while the connection rigidity of the fender is guaranteed, injury to pedestrians after the pedestrians are knocked down by automobiles can be relieved, and the life safety of the pedestrians can be protected; connection errors in the vertical directions can be reduced, and accordingly appearance gaps of the automobiles can be guaranteed.

A three-floating body type semi-submersible platform comprises an upper portion platform and lower floating bodies which extend along the upper portion platform longitudinally; vertical columns are connected between the upper portion platform and the lower floating bodies; the lower floating bodies are floating cylinders which are in slender shapes; three floating cylinders are horizontally arranged along the upper portion platform; the central line of the middle floating cylinder and the longitudinal section of the upper portion platform are in the same plane; the two outside floating cylinders are symmetrically arranged on bilateral sides of the middle floating cylinder; at least two vertical columns are connected between the upper portion platform and every floating cylinder; the vertical columns are arranged along the longitudinal direction of the floating cylinders in an interval mode; the middle floating cylinder and the two outside floating cylinder or the vertical columns on the middle floating cylinder and the vertical columns on the two outside floating cylinders are respectively connected through at least two horizontal supports. The three-floating body type semi-submersible platform has the advantages of being high in integral strength and rigidity, stable in stormy weaves and suitable for shallow water environment, enabling the integral strength and rigidity of the platform to be guaranteed and enabling platform stability in the stormy weaves when being a large sized platform with the size of several hundred meters to be guaranteed due to the fact of a three-floating-body type arrangement structure.

The invention relates to the technical field of robots, in particular to a wearable human body exoskeleton robot. The wearable human body exoskeleton robot comprises a back frame, the back frame comprises a back plate and a mounting plate which are perpendicularly connected together, a control cabinet is mounted on the mounting plate, and two L-shaped supports are arranged at two edges of one side, close to the back plate, of the bottom of the mounting plate symmetrically. The wearable human body exoskeleton robot has the advantages that flexible tying band connection is adopted at the thigh and shank positions, and a specific movement position error is allowed between a human and an exoskeleton, so that proper connection rigidity can be maintained between the human and the robot; the wearable human body exoskeleton robot is provided with positioning holes adjustable in width and height and adopting bolt connection, thereby being suitable for users with different physiques and convenient to adjust; angle sensors and force sensors are arranged and used for acquiring user movement state data.

The invention discloses a passenger compartment shape retention device and an automobile provided with the same, relates to a passenger compartment shape retention device for protecting safety of passengers during collision of an automobile, and belongs to the field of safety devices of automobiles. The passenger compartment shape retention device comprises a front wall plate, an instrument board crossbeam and an additional support beam extending between the front wall plate and the instrument board crossbeam, and a joint of the additional support beam on the instrument board crossbeam is positioned between a steering column mounting support and a second end. The passenger compartment shape retention device is simple in structure, the additional support beam is connected with the instrument board crossbeam and the front wall plate, deformation of the additional support beam, the instrument board crossbeam and the front wall plate which are used as a combination during collision is controllable, and the additional support beam cannot be broken to cause excessively high maintenance expenditure. Besides, the additional support beam is arranged between the instrument board crossbeam and the front wall plate, and the integral collision resistance of the passenger compartment shape retention device is improved, so that rearward movement of the instrument board crossbeam and rearward movement of the front wall plate are effectively controlled, and injury to chests of passengers is relieved.

The invention discloses an unmanned aerial vehicle equipped with multiple protection devices and a control method thereof, and belongs to the technical field of unmanned aerial vehicles. The unmannedaerial vehicle equipped with the multiple protection devices includes a plurality of buffer energy absorbing devices, an airbag device and a parachute device. The connecting position of each rotor anda vehicle body is provided with the corresponding buffer energy absorbing devices, a number of buffer energy absorbing hollow structures are arranged in the buffer energy absorbing devices, the two ends of each buffer energy absorbing device are connected to the corresponding rotor and the vehicle body, and the buffer energy absorbing devices are allocated to generate deformation firstly when theunmanned aerial vehicle is impacted; the airbag device includes at least one airbag and an inflation structure, and the inflation structure is configured to inflate the airbag so as to expand the airbag and wrap task equipment of the unmanned aerial vehicle; and the parachute device includes at least one parachute bag and parachute opening structures, and the parachute opening structures are configured to launch the parachute bags. The unmanned aerial vehicle adopts the triple protection devices including the parachute device, the airbag device and the buffer energy absorbing devices, multiple-stage multi-aspect protection of the unmanned aerial vehicle is carried out, and the safety is high.

The invention discloses a traction type bridge deviation rectifying device and a construction method thereof. The traction type bridge deviation rectifying device comprises a base used for providing a counter force, a traction module used for providing a deviation rectifying load, a traction cable used for transmitting the load, a deconcentrator, a hoop cable, a hoop and a monitoring module. The path of the traction cable can be adjusted according to actual site conditions, the installation position is flexibly arranged, the device is small in size and flexible and rapid to install and use, deviation rectification load transmission can be achieved by crossing site obstacles, and the device is suitable for rapid emergency rescue or bridges with limited surrounding sites. And the hoop can adapt to variables such as different sizes and shapes of a bearing platform, and can effectively and uniformly transmit the deviation rectification load to the bearing platform, so that a set of complete assembly type universalization device is integrally formed, and a brand-new thought is provided for bridge deviation rectification.

The invention relates to a composite material structure applicable to a point-connected spacecraft in the field of star-arrow connecting structures. The composite material structure comprises a force-bearing barrel lower end frame and reinforcing corner boxes, wherein the section of the force-bearing barrel lower end frame is F-shaped; the force-bearing barrel lower end frame mainly comprises an inclined plane, riveting holes, a flanging flange and connecting flanges; the section of the reinforcing corner boxes is L-shaped; riveting holes are formed in the reinforcing corner boxes; the reinforcing corner boxes are riveted to the inclined plane of the lower end frame; the sections of the reinforcing corner boxes are fitted to the surfaces of the inclined plane and the connecting flanges. The composite material structure meets a lightweight design requirement of a force-bearing barrel of a new-generation Mars probe structural platform in China and also guarantees the connecting strengthand the connecting rigidity during connection with a carrier.

The invention provides an automobile power assembly suspension structure and belongs to the technical field of automobiles. The technical problem that an existing power assembly suspension structure can not consider the damping effect and the limiting effect of a power assembly is solved by the automobile power assembly suspension structure. According to the automobile power assembly suspension structure, an automobile comprises a power assembly and an auxiliary frame assembly; the suspension structure comprises a first installation support fixedly connected with the auxiliary frame assembly and a second installation support fixedly connected with the power assembly. A spiral damping spring is arranged between the first installation support and the second installation support. The suspension structure further comprises a limiting piece fixedly connected between the first installation support and the second installation support and arranged in a spiral through hole of the damping spring, so that the power assembly is only allowed to move in the axis direction of the damping spring. The automobile power assembly suspension structure has the advantages that the damping effect is good, the limiting effect between the power assembly and the auxiliary frame assembly is good, and service life is long.

The invention relates to a base-station housing body, in particular to an improvement to the chassis structure and to the connecting structure between the chassis and the upright posts in the base-station housing body. The chassis of the base-station housing body includes a bottom frame, as well as steel bottom plates and contour plates mounted face to face on the upper and lower sides of the bottom frame; the bottom frame includes two supporting beams arranged face to face and two bottom beams arranged face to face between the supporting beams; corner pieces for connecting the upright posts are arranged at the four corners on the upper surface of the bottom frame; upright post mounting holes are opened on both ends of the upper surface of each supporting beam; all upright posts are fixed at the corners of the chassis through the corner pieces and the upright post mounting poles. It can be seen that the upright posts can be conveniently mounted on the chassis through the corner pieces and the upright post mounting holes, thus ensuring the rigidity of the connection between the upright posts and the bottom frame at two horizontal directions; then wall panels can be quickly and conveniently installed on the upright posts.

The invention discloses a POS mesa support device, which comprises a base, an upright pole, a main screen holding hoop and a main screen support, a sub screen holding hoop and a sub screen support, etc. The upright pole is fixed on the base; A main screen clasp hoop and an auxiliary screen clasp hoop are connecte with that vertical pole; The main screen bracket is fixed on the main screen clasp, and the sub screen bracket is fixed on the sub screen clasp. Height of main screen, the display direction and pitch angle are adjustable, the height of the customer-specific touch display, Display direction, the pitch angle and length range are adjustable, An upright rod is fix on that base, The connecting rigidity of the vertical pole is ensured, the stability of the whole device is ensured by thebase, and the keyboard and the printer are also fixed on the base, so that the POS table bracket device can be integrally applied to any table surface, especially to the traditional simple table surface, and the technical problem that the existing table surface is not suitable for the new cash register mode is solved.

The invention discloses a bridge active deviation rectifying device adjacent to a foundation pit and a construction method of the bridge active deviation rectifying device. The bridge active deviation rectifying device comprises a local reinforcing module used for reinforcing a soil retaining structure of the foundation pit, a servo module used for providing deviation rectifying loads, a force transmission module used for transmitting the loads, a bearing platform hoop and a monitoring module used for bridge monitoring. A series of problems of deviation rectification of a bridge structure close to the edge of a foundation pit are solved in a targeted mode, the device can adapt to variables such as the relation between different relative positions and distances between the foundation pit and a bearing platform and the size and shape of the bearing platform, deviation rectification loads can be effectively and evenly transmitted to the bearing platform, and a complete assembly type universalization device is formed; and a brand-new thought is provided for deviation rectification of the bridge adjacent to the foundation pit. In addition, due to the modular design of the device, on-site rapid installation and use can be achieved, and an effective solution is provided for bridge structure safety protection, emergency rescue and the like.

The invention discloses a staggered connection process boss tool and a method for machining a workpiece. The boss tool comprises a process boss body and a workbench; a pressing hole is formed in the process boss body; a bolt penetrates through the pressing hole to fix the process boss body onto the workbench; the process boss body is connected with the workpiece through connecting pieces; the connecting pieces includes a high-position connecting block and a low-position connecting block; the high-position connecting block and the low-position connecting block are arranged in a staggered mannerin the transverse and longitudinal directions, and the appearance of the workpiece is pressed in the high position and the low position, so that the clamping stability is improved, and the connectingstrength and rigidity of a process boss can be guaranteed even if the area of connecting parts is reduced. A bench worker can break and polish the workpiece easily, and thus the working efficiency ishigh.

The invention relates to an assembly device of a space-assembled antenna assembly unit, which mainly includes a docking ball head, a docking cylinder, a rotating cylinder, a docking ball socket, a pre-tightening compression spring, a pre-tightening torsion spring, a ball stud, and a ball stud Pre-tightening compression spring, compression spring limit block, butt cylinder end cover, pre-tightening force adjustment screw, deep groove ball bearing and other components. The butt ball head is limited by the ball stud pin and the butt ball socket in the docking cylinder cavity, the ball stud pin is fixed on the docking cylinder by the ball stud pin pre-tightened compression spring, and the compression spring limit block, and the butt socket is adjusted by the preload The screw and the pre-tightening torsion spring are connected to the end cover of the butt joint. By adjusting the pre-tightening force to adjust the length of the screw, the pre-tightening force of the butt ball socket and the butt ball head can be adjusted. There is a pre-tightening torsion spring between the butt joint and the rotating cylinder. , the torsion spring makes the unlocking hole on the rotating cylinder staggered with the ball stud, and the ball stud is limited by the rotating cylinder. At this time, the butt joint ball is limited by the ball stud, and the butt joint cannot be inserted or pulled out.

A HSK shank with compensation ability for fixing cutting tool to machine-tool features that a dirt-removing ring slot is made on its flange surface and several special flushing hole channels communicated with original high-pressure cooling liquid channel are made in the shank. Its advantages are high cleaning and abrasion compensating effect, and high load-bearing power.

The invention relates to an interstage separation device suitable for small-diameter aircrafts. The device is jointly composed of a connecting and unlocking device and an impulse separating device, and can be widely applied to the small-diameter aircrafts such as multi-stage rocket projectiles and multi-stage target projectiles. When an aircraft flies, connection and separation of a boosting stage and an upper stage are achieved through the interstage separation device. The connecting and unlocking device mainly comprises an upper-stage connecting cabin, a lower-stage connecting cabin, an unlocking top disc, steel balls, explosive bolts, ball pads and locking nuts; and the impulse separating device is mainly a cylindrical spring. When the aircraft flies in a whole rocket mode, the upper-stage connecting cabin is connected with the upper stage in a fastened mode, and the lower-stage connecting cabin is connected with the boosting stage in a fastened mode. The unlocking top disc radially supports the six steel balls in an upper-stage connecting locking hole and a V-shaped groove of the lower-stage connecting cabin, so that inter-stage axial limiting is realized; and a shear pin on the upper-stage connecting cabin is inserted into a radial limiting groove of the lower-stage connecting cabin, and interstage radial limiting is achieved. After the aircraft completes boosting flight at the boosting stage, the explosive bolts are detonated and separated, the unlocking top disc moves forwards under the action of the cylindrical spring, the steel ball radial support is relieved, the steel balls fall into an unlocking top disc groove, and the aircraft completes stage unlocking; and the cylindrical spring pushes the unlocking top disc to drive the upper-stage connecting cabin to continuously move until the upper-stage connecting cabin and the lower-stage connecting cabin are separated, and the aircraft achieves reliable interstage separation.

The invention provides an automobile power assembly suspension structure and belongs to the technical field of automobiles. The technical problem that an existing power assembly suspension structure can not consider the damping effect and the limiting effect of a power assembly is solved by the automobile power assembly suspension structure. According to the automobile power assembly suspension structure, an automobile comprises a power assembly and an auxiliary frame assembly; the suspension structure comprises a first installation support fixedly connected with the auxiliary frame assembly and a second installation support fixedly connected with the power assembly. A spiral damping spring is arranged between the first installation support and the second installation support. The suspension structure further comprises a limiting piece fixedly connected between the first installation support and the second installation support and arranged in a spiral through hole of the damping spring, so that the power assembly is only allowed to move in the axis direction of the damping spring. The automobile power assembly suspension structure has the advantages that the damping effect is good, the limiting effect between the power assembly and the auxiliary frame assembly is good, and service life is long.

The invention relates to a damper with a staging energy consumption function, and belongs to the technical field of building structural engineering. The damper comprises two energy consumption platesand connecting plates. The two energy consumption plates are arranged in the corner between a frame beam and a frame column and conduct staging energy consumption. The connecting plates are used for connecting the energy consumption plates with the frame beam and the frame column. The distances between the two energy consumption plates and the center of rotation are different. The connecting plates and the energy consumption plates are connected through welded joints. The distance between the energy consumption plate on the inner side and the center of rotation and the distance between the energy consumption plate on the outer side and the center of rotation are different. Along with the increase of the rotational angle, the energy consumption plate on the outer side consumes energy, thenthe energy consumption plate on the inner side consumes energy, and then staging energy consumption is achieved. Compared with an existing damper, the damper with the staging energy consumption function has the advantage of achieving the better energy consumption effect. The damper with the staging energy consumption function is simple in structure, the most of connection is bolted connection, andthe assembling operation can be achieved. After an earthquake happens, seismic reduction and energy dissipation can be conducted, replacement is convenient, and the damper with the staging energy consumption function can be widely applied to the technical field of seismic reduction and energy dissipation of building structures.

The invention relates to a thin-wall bar support device unfolded by driving of air inflation. The thin-wall bar support device comprises a roller, a flexible adhesive buckle assembly, a thin-wall barwith one end arranged on the roller, and a link mechanism controlling recovery of the section of the thin-wall bar in the roller, the thin-wall bar comprises an upper supporting wall and a lower supporting wall which are arranged symmetrically, the upper supporting wall and the lower supporting wall are both made from flexible materials, a tubular air bag extending from one end of the thin-wall bar to the other end of the thin-wall bar and a built-in air pillow assisting the recovery of the section of the thin-wall bar are further arranged on the thin-wall bar. The flexible adhesive buckle assembly comprises a flexible adhesive buckle male paste arranged on the upper surface of the upper supporting wall and a flexible adhesive buckle female paste arranged on the lower surface of the lowersupporting wall. The double-link mechanism in the roller is connected with the bar wall of the thin-wall bar, and a sliding shaft of the double-link mechanism is fixed to the roller. After the sectionis restored in place, flexible adhesive buckles and clamping pins arranged at the top of the mechanism are used for double locking. A section recovery mechanism is located on the eccentric position of the roller. According to the thin-wall bar support device unfolded by driving of air inflation, the weight is low, and the volume is small after the spreading thin-wall bar support device is closed.

The invention provides an outer curve finned tube and a manufacturing method thereof. The finned tube comprises a tube body and fins located on the outer wall of the tube body; the tube body is made of metal; and the fins are made of aluminum or copper. The finned tube is characterized in that each fin comprises a first-stage fin body and secondary fin bodies, the second-stage fin bodies are arranged on the first-stage fin bodies, the multiple secondary fin bodies are arranged on each first-stage fin body and are asymmetrically arranged on each first-stage fin body, the multiple fins are arranged on the outer wall of the tube body in an circular ring shape in the direction perpendicular to the tube axis so as to form a plurality of circular ring fin groups, and the value of the distance between every two adjacent circular ring fin groups in the multiple circular ring fin groups is gradually increased in the direction of the tube axis and is in an equal-difference arrangement mode.

The invention discloses a pyrotechnically actuated separation impact reduction device based on an inverse wavelength characteristic and a preparation process thereof. A plurality of closed accommodating cavities which are distributed in sequence are formed in a to-be-separated component. Among the multiple accommodating cavities distributed in sequence, damping particles are arranged in the accommodating cavities which are distributed periodically with a pyrotechnically actuated impact occurring position as the circle center, and a resonance unit with a frequency bandwidth characteristic is formed; and since the damping particles are excited under impact, the resonance unit and impact waves can achieve a coupling effect. By applying the scheme, an inverse wavelength characteristic mechanism is introduced into the structural design of the impact reduction device, an obvious impact reduction effect can be obtained on the basis of the small additional mass, and accordingly, the connecting rigidity requirement of the device is effectively considered.

The invention relates to the technical field of clamps, and discloses a convenient-to-mount-and-dismount bearing column vertical processing clamp. The clamp comprises a table top, wherein a footstandis fixedly connected to the bottom of the table top, a base is arranged at the top of the table top, the bottom of the base is fixedly connected with the table top through bolts, a vertical sliding groove is formed in the side face of the base, a top seat is fixedly installed on the side surface of the top of the base, a motor is fixedly connected to the bottom of the table top, and a first two-way threaded rod is fixedly connected to an output shaft of the motor. According to the convenient-to-mount-and-dismount bearing column vertical machining clamp, the first two-way threaded rod can be driven to rotate through operation of the motor, then a first clamping mechanism and a second clamping mechanism are driven to move, the distance can be adjusted, the clamp is suitable for bearing columns of different lengths or adjusting clamping points, the applicability is high, two clamping plates can be driven to move inwards at the same time by rotating a handle, clamping and fixing are achieved, and operation is convenient.

The invention discloses an ultrahigh-bearing-capacity large-diameter pipe pile and a fast pile sinking and secondary grouting method. The pipe pile is provided with a pair of symmetric hole ways in the vertical direction. A grouting device is fixed to the pile end of the pipe pile and comprises an upper end plate, a middle end plate and a lower end plate. The upper end plate is provided with a pair of vertically-through round through holes, and the round through holes are in one-to-one correspondence to the hole ways. The outer side of the middle end plate and the outer side of the upper end plate are fixedly connected in a seamless manner to form a hollow cavity. A pipeline is arranged in the middle end plate. One end of the pipeline is in seamless connection with one round through hole, and the other end of the pipeline is located over the lower end plate. An elastic sealing ring is arranged between the lower end plate and the middle end plate in a seamless manner and comprises multiple sealing pads attached in a seamless manner. Multiple holes distributed evenly and symmetrically are formed in the open face between the outer edge of the lower end plate and the outer edge of the middle end plate. The hole way connected with the pipeline is used for a secondary grouting hole of pile sinking, and the other hole way is used for a water jet hole and a primary grouting hole. According to the ultrahigh-bearing-capacity large-diameter pipe pile and the fast pile sinking and secondary grouting method, water jet and grouting integration of the large-diameter pipe pile can be achieved, and the pipe pile has the ultrahigh bearing capacity after grouting.

The invention belongs to the technical field of vehicles, and discloses a connecting rod structure and an engine. The connecting rod structure comprises a connecting rod body and a connecting rod cover. The connecting rod body and the connecting rod cover are detachably connected through a connecting rod bolt. A connecting rod large head hole is formed between the connecting rod body and the connecting rod cover. A cutting contact surface between the connecting rod body and the connecting rod cover is not overlapped with the central plane of the connecting rod large head hole and is located onone side, close to the connecting rod cover, of the central plane. According to the connecting rod structure, if the length of the connecting rod bolt is unchanged, the contact length of the connecting rod bolt and the connecting rod body is increased so as to enhance the connecting strength between the connecting rod cover and the connecting rod body; and if the contact length of the connectingrod bolt and the connecting rod body is kept unchanged, the thickness between the bottom of a connecting rod bolt hole and the side wall of the connecting rod body is increased, and the situation thatthe wall thickness between the connecting rod bolt hole and the connecting rod body is too small, and bending deformation happens easily is avoided, so that the rigidity of a connecting rod large head is improved.

The invention discloses a passenger compartment shape retention device and an automobile provided with the same, relates to a passenger compartment shape retention device for protecting safety of passengers during collision of an automobile, and belongs to the field of safety devices of automobiles. The passenger compartment shape retention device comprises a front wall plate, an instrument board crossbeam and an additional support beam extending between the front wall plate and the instrument board crossbeam, and a joint of the additional support beam on the instrument board crossbeam is positioned between a steering column mounting support and a second end. The passenger compartment shape retention device is simple in structure, the additional support beam is connected with the instrument board crossbeam and the front wall plate, deformation of the additional support beam, the instrument board crossbeam and the front wall plate which are used as a combination during collision is controllable, and the additional support beam cannot be broken to cause excessively high maintenance expenditure. Besides, the additional support beam is arranged between the instrument board crossbeam and the front wall plate, and the integral collision resistance of the passenger compartment shape retention device is improved, so that rearward movement of the instrument board crossbeam and rearward movement of the front wall plate are effectively controlled, and injury to chests of passengers is relieved.