435 results about "Central plane" patented technology

A derailleur hanger includes a first portion and a second portion. The first portion includes a first part and a second part extending from the first part. The second part includes an axle receiving bore configured to receive a hub axle. The second portion is configured to support a derailleur. The first part includes a frame contact surface disposed in a reference plane extending perpendicular to a center axis of the hub axle in an installed state where the derailleur hanger is mounted to the hub axle. The second portion includes a first surface disposed on a first side of the reference plane. A vehicle center plane is positioned at a second side of the reference plane in the installed state. The second part is disposed on the first side in the installed state, and is disposed at least partially farther from the reference plane than the first surface.

A mirror image additive manufacturing method for a composite material component is characterized in that the position of a virtual central plane of the component is determined, and double laying heads symmetrical along the central plane are arranged on the two sides of the central plane; the double laying heads are respectively provided with heat sources; the double laying heads synchronously move along the laying track and mutually provide opposite supporting force, the angle of the supporting force is valued in the angle range between the normal direction of the central plane and the normal direction of the surface of the component, and when the normal direction of the central plane and the normal direction of the surface of the component are not collinear, the virtual central plane is updated according to the geometric center position of the current laid component; and the material spreading speeds of the double spreading heads are independently controlled. In order to solve the problems of large deformation and poor performance caused by unbalanced residual stress inevitably formed by traditional single-side heating, single-side pressurizing and single-direction laying, the invention provides a method for introducing opposite-vertex double laying heads on two sides of the component, so that small and balanced distribution of stress is ensured, and the manufacturing precision and quality of the composite material component are effectively improved.

A golf club head includes a center of gravity spaced less than 5 mm from a vertical center plane that is perpendicular to a striking face plane and extends through a striking face center. The golf club head also includes a first component having a first melting point and a first density and a second component having a second melting point higher than the first melting point and a second density less than the first density. And the second component (i) is at least partially encapsulated by the first component, (ii) extends into a hosel portion below a hosel bore, and (iii) has a mass less than about 5 g.

A hand-held grinding machine includes a disc tool having a machining face for machining a workpiece; a motor for driving a holder holding the tool arranged in a machine housing; a port for removing dust during machining; and an energy-storage-device interface for detachably connecting, using a connection interface, an energy storage device for supplying electrical energy to the grinding machine that includes an energy-storage-device housing extending along an energy-storage-device longitudinal central plane; and a handle for grasping and guiding the grinding machine forwards along the workpiece in a working direction parallel to a machine longitudinal central plane of the machine housing extending transversely to the machining face. The energy-storage-device interface is arranged relative to the machine plane and / or the connection interface is arranged relative to the energy-storage-device plane such that the energy-storage-device plane is distanced transversely from the machine plane when the device is on the energy-storage-device interface.

A mirror image additive manufacturing track compensation method for a composite material component is characterized in that two material deposition heads are symmetrically distributed along the center face of the component and synchronously move, and materials are stacked towards the two sides of the center face at the same time. A distance sensor is arranged on each deposition head, and the actual position of the deposited component is measured in the normal direction of the center face. And the compensation amount of the next track point is calculated and corrected in real time by calculating the deviation between the actual position and the theoretical position, recording the historical deviation and combining the curvature of the track point, so that the G code track of the double deposition heads is adjusted in real time. According to the method, the deviation between the component shape and the theoretical model in the additive manufacturing process can be effectively reduced, and the deposition precision and the forming quality are improved. In addition, according to the distance measurement method, a combination mode of sound wave distance measurement, photoelectric distance measurement, laser radar and visual fusion distance measurement can be selected, and the accuracy of real-time compensation is ensured.

The utility model discloses an integrated power assembly suspension system of an off-highway dumper, which is horizontally arranged and comprises an engine suspension structure, a pair of first connecting pieces, a pair of second connecting pieces, a pair of third connecting pieces, a pair of fourth connecting pieces and a pair of fourth connecting pieces, and the first connecting pieces are symmetrically arranged on two sides of a central surface of an engine flywheel casing in the width direction of a power assembly; the left side and the right side of the front end of the engine are connected with the left frame and the right frame respectively; the gearbox suspension structure comprises a pair of second connecting pieces which are symmetrically arranged on the two sides of the center face of the engine flywheel shell in the width direction of the power assembly, and the left side and the right side of the rear end of the engine and the left side and the right side of the rear end of the gearbox are connected and then connected with the left frame and the right frame. The four-point type suspension system has excellent vibration damping performance, simultaneously avoids stress damage of a flywheel casing caused by insufficient support of a traditional four-point type suspension system on the premise of a large-torque power assembly, thoroughly solves the problem of difficulty in assembly and maintenance, and realizes that a power assembly system can still keep away from an upper wing surface of a frame in a limited frame space. And integrated hoisting and dismounting are completed.

The utility model provides a spoiler structure and an automobile wind-feeling-free air outlet. The spoiler structure comprises a middle shaft and a plurality of spoilers arranged on the middle shaft. When air flow passes through the air channel, the air flow needs to penetrate through the spoilers, and when the central axis faces of the spoilers are arranged to form acute angles or obtuse angles relative to the central axis, and the spoilers with certain angles rotate, the air flow penetrating through the spoilers can be continuously disturbed, and the direction of the air flow is continuously changed. When the air flow disturbed by the spoiler is led out from the air duct, the blowing disturbance feeling to passengers is weakened, so that the air duct still has a strong wind-feeling-free function under the condition that the occupied space of the air duct is small.

The utility model relates to an automatic cat litter basin which comprises a base, a roller, a driven tooth structure, a driving tooth structure and a driving device. The rollers form a central plane perpendicular to the rotating axis of the rollers, and the rollers are symmetrically or approximately symmetrically arranged according to the central plane. The driven tooth structures are arranged on the outer wall of the peripheral side of the roller and extend in the circumferential direction of the roller, and the driven tooth structures are symmetrically arranged according to the center face. The driving tooth structures are installed on the base, the driving tooth structures are symmetrically arranged according to the center face, the driving tooth structures are correspondingly engaged with the driven tooth structures, and the driving device is used for driving the driving tooth structures to move. When the roller is placed on the base, the driven tooth structure is meshed with the driving tooth structure, the driving device can drive the driving tooth structure, and then the roller is driven to rotate around the rotating axis.

The utility model relates to an automatic cat litter basin which comprises a base, a roller, a driven tooth structure, a driving tooth structure and a driving device. The rollers form a central plane perpendicular to the rotating axis of the rollers, and the rollers are symmetrically or approximately symmetrically arranged according to the central plane. The driven tooth structures are arranged on the outer wall of the peripheral side of the roller and extend in the circumferential direction of the roller, and the driven tooth structures are symmetrically arranged according to the center face. And the driving tooth structures are mounted on the base, are symmetrically arranged according to the central plane, and are correspondingly engaged with the driven tooth structures. The guide structure is used for limiting movement of the roller in the rotation axis direction of the roller. The driving device is used for driving the driving tooth structure to move. When the roller is placed on the base, the driven tooth structure is meshed with the driving tooth structure, the driving device can drive the driving tooth structure, and then the roller is driven to rotate around the rotating axis.

The invention discloses a high-detection-efficiency groove silicon carbide neutron detector structure, and relates to the technical field of semiconductor neutron detection, a plurality of groove groups are etched on the top surface of a SiC substrate, and each groove group comprises groove units which are sequentially connected along the direction of a first central plane of the SiC substrate; each groove unit comprises a first groove and a second groove which are symmetrically arranged, and the bottom faces of the first grooves and the bottom faces of the second grooves are parallelograms which are symmetrically arranged. According to the neutron detector, the groove structure of a traditional neutron detector is improved, the filling area of the neutron conversion material is increased due to the arrangement of the through groove groups, meanwhile, the contact area of the neutron conversion material and the SiC region is also increased, the self-absorption effect of secondary particles is reduced, and the detection efficiency of the detector is remarkably improved.

A press wheel includes a hub configured to rotate about an axis. The press wheel may further include a mounting portion removably attachable to the hub and having a center plane substantially perpendicular to the axis upon removable attachment with the hub. The press wheel may further include a plurality of tread portions connected to the mounting portion and configured to define a circumferential portion of the press wheel. The plurality of tread portions may have voids between adjacent tread portions. Each tread portion of the plurality of tread portions may include a tine extending away from the center plane.

The invention provides a cavity filter, and relates to the technical field of filters. The cavity filter comprises a shell part, the shell part is constructed to form a first cavity and a second cavity, and a first coupling window is constructed between the first cavity and the second cavity. Wherein the first cavity is internally provided with a 1 / 4 wavelength resonance unit, and the second cavity is internally provided with a first coupling resonance unit and a second coupling resonance unit which are symmetrically arranged about the longitudinal center plane of the second cavity. The 1 / 4 wavelength resonance unit comprises a first cylinder and a second cylinder which are coaxially arranged, and the diameter of the first cylinder is larger than that of the second cylinder. The first coupling resonance unit comprises a first resonance part and a second resonance part, and the impedance of the first resonance part is larger than that of the second resonance part. The second coupling resonance unit comprises a third resonance part and a fourth resonance part, and the impedance of the third resonance part is larger than that of the fourth resonance part. The cavity filter provided by the invention has the advantages of wide stop band and miniaturization.

The present invention specifically relates to the field of welding and manufacturing of quartz glass. Disclosed in the present invention are a welding device and a welding method which are used for machining a quartz base. The welding device comprises a base, two automatic welding devices, a supporting device, a clamping device, a transmission device and two reference plates, wherein the base comprises a quartz flange, quartz sheet and quartz rod, which are integrally connected; the supporting device supports the base and is closely attached to the quartz flange; both sides of the supporting device are each provided with a notch, the notches being symmetrical with respect to a central plane of the supporting device; the two automatic welding devices are respectively disposed at the two notches and can move toward or away from each other; welding points on the surface of the base are monitored by means of position sensors, and on the basis of monitoring results, a driving member is triggered to rotate; and the relative positions of the automatic welding devices with respect to the welding points on the base are corrected at the moment when the driving member engages with a central base plate, such that the consistency and accuracy of the welding points are ensured, thereby improving the dimensional accuracy of the base.

The invention belongs to the technical field of microwave communication, and relates to a coaxial double-stop-band filter, which comprises an inner conductor, an outer conductor, an insulating medium body, a signal input port and a signal output port, and is characterized in that the inner conductor is coaxially sleeved in the outer conductor, and the insulating medium body is positioned between the inner conductor and the outer conductor; two ends of the inner conductor are respectively connected with signal connecting ends of the signal input port and the signal output port; the outer conductor comprises a metal cylinder, the two ends of the metal cylinder are fixedly connected with the signal input port and the signal output port respectively, two defected ground structures which are symmetrically distributed relative to the central plane of the outer conductor are arranged on the metal cylinder, and each defected ground structure comprises a first gap and three second gaps which are arranged in parallel at intervals. The length direction of the second gaps is parallel to the axial direction of the metal cylinder, and the three second gaps are communicated through the first gap. The dual-band interference suppression performance is excellent, the passband insertion loss is low, the structure is novel, the power capacity is large, and processing is easy.

The invention provides a core column and magnetic pole structure of an endogenous cyclotron, the core column is symmetrically arranged in central areas at two sides of a central plane of the accelerator, the core column is a big-end-down circular truncated cone-shaped core column, a pair of core column concave platforms is arranged on the circular truncated cone, and the core column concave platforms are used for arranging ion sources; according to the magnetic pole structure, a main magnetic pole and a core column are integrally manufactured, and the core column in the middle of the integrated magnetic pole structure is of a big-end-down circular-truncated-cone-shaped structure; chamfers are arranged at the junctions of the two side faces and the upper surface of each magnetic pole of the integrated magnetic pole structure, and four slopes inclining towards the central point of the central area are designed in the head area of the fan-shaped magnetic pole, so that transition from a circular truncated cone in the central area to a peripheral magnetic field is smoother; on the basis that the radial size of the upper surface of the core column is not increased, the head magnetic field is still improved by increasing the volume, close to the lower surface, of the core column; the two symmetrical concave platforms are designed on the circular truncated cone type core column, so that the symmetry of a magnetic field is reserved, and meanwhile, a sufficient installation space is reserved for an ion source.

The present invention relates to a downhole tool string for displacing at least a tool section in a well in a radial direction in a wall of a well tubular metal structure extending along an axial direction in relation to the radial direction, comprising a tool body having an outer face and a tool centre axis along the axial direction, a centre plane extending along and enclosing the centre axis, dividing the tool body into a first body half and a second body half, an operational machining tool for performing a machining operation in the well tubular metal structure, such as drilling a hole in the wall, and extendable from the outer face of the first body half in a first radial direction in relation to the tool centre axis, and a first displacement element extendable from the outer face of the second body half of the tool body for displacing the tool body towards the wall for arranging the operational machining tool close to the wall, the first displacement element being extendable between a retracted position and a projected position, wherein the downhole tool string further comprises a first distancing element extendable from the outer face of the first body half, the first distancing element having a retracted position and a projected position, and in the projection position of the first distancing element a distance is provided between the outer face and the wall of the well tubular metal structure. Moreover the present invention also relates to a downhole system.

The invention belongs to the field of mechanical sensors, and discloses a full-plane six-dimensional force sensor. The sensor comprises a fixed table, a central loading table, eight radial beams and four circumferential beams which are arranged on the same central plane in the thickness direction, the radial beams are uniformly arranged between the central loading table and the fixed table at intervals along the circumferential direction; the radial beams which are symmetrical in pairs form a group of radial beams, two groups of radial beams which are perpendicular to each other are Fx-axis radial beams and Fy-axis radial beams respectively, and the other two groups of radial beams are Mz-axis radial beams and Fz-axis radial beams respectively; the four circumferential beams are matched with the four radial beams which are arranged at intervals one by one, and the circumferential beams are vertically and equally divided by the radial beams; the circumferential beams perpendicular to the Fx-axis radial beams are My-axis circumferential beams, and the circumferential beams perpendicular to the Fy-axis radial beams are Mx-axis circumferential beams; the strain gauges are divided into six groups, and each group of strain gauges form an independent full-bridge circuit. According to the invention, inter-dimensional crosstalk is eliminated from a mechanical structure, and the sensor has the advantages of high sensitivity, isotropy, strong overload capability and easy processing.

A back sleeper pillow for supporting a head of a sleeper in a back sleeping position includes a pillow body having a frontside and a backside opposite the frontside. Each of the frontside and the backside is divided by a center plane. A primary head support surface is included on the frontside of the pillow body. At least one bumper adjacent to an edge of the primary head support surface and rising forward from the primary head support surface is included and configured to support the head of the sleeper in a neutral position during sleep. At least one shoulder horn extending down from the at least one bumper is included and configured to extend over a shoulder of the sleeper when the head of the sleeper is positioned on the primary head support surface.

The present disclosure relates to a device for heating a medium, including a burner unit and a flame tube, wherein the burner unit generates flue gas, wherein the flame tube has a flue gas inlet, a longitudinal axis, a casing extending along the longitudinal axis, and an end face opposite the flue gas inlet, wherein the flue gas passes from the burner unit into the flame tube via the flue gas inlet, wherein a plurality of recesses are located in the casing, and wherein the recesses have different dimensions and / or are distributed asymmetrically on the casing. The longitudinal axis is in a central plane, wherein a first side and a second side of the casing are formed by the central plane, and wherein recesses on the first side have smaller dimensions than recesses on the second side.

This constant velocity joint comprises: an outer joint member defining a longitudinal axis and including a first outer ball track and a second outer ball track; an inner joint member including a first inner ball track paired with the first outer ball track, and a second inner ball track paired with the second outer ball track; a plurality of balls; and a ball cage accommodating the plurality of balls. The outer joint member comprises an open side and a coupling side facing each other along the longitudinal axis. The pair of the first outer ball track and the first inner ball track forms a first aperture angle toward the open side in a non-articulated state, and the pair of the second outer ball track and the second inner ball track forms a second aperture angle toward the coupling side in a non-articulated state. The center line of the first outer ball track comprises a first coupling side arc through which a joint center surface passes and a first open side arc connected to the first coupling side arc. The center line of the second outer ball track comprises an intermediate arc through which the joint center surface passes, and a second coupling side arc and a second open side arc respectively connected to both sides of the intermediate arc.

The invention relates to an offset powder distribution box. The offset powder distribution box comprises a box body, a powder homogenizing roller and a powder feeding auger, a powder distribution cavity and a powder homogenizing cavity which are communicated up and down are formed in the box body; a powder discharging opening is formed in the bottom of the powder homogenizing cavity; the powder feeding auger is horizontally arranged at the top of the box body and comprises a powder feeding pipe, a powder feeding motor and an auger rod; the auger rod is inserted into the powder feeding pipe; the powder feeding motor is in driving connection with the auger rod; the powder feeding pipe horizontally penetrates through the left and right sides of the box; a circulating powder feeding opening is formed in the bottom of the powder feeding pipe; one end of the circulating powder feeding port is close to the bilaterally symmetrical central plane of the powder distribution cavity, and the other end extends towards the powder feeding motor; the powder homogenizing roller is horizontally arranged at the bottom of the box body and comprises a roller body and a powder homogenizing motor; the roller body is rotationally mounted in the powder homogenizing cavity; the powder homogenizing motor is in driving connection with the roller body; and more than three fan-shaped powder accommodating grooves are distributed on the circumference of the side surface of the roller body. Powder conveyed by the auger rod falls into the center of the powder distribution cavity through the circulating powder feeding opening; and the powder in the powder containing groove is rearranged every time the powder homogenizing roller slowly rotates by a certain angle, so that uniform powder distribution is ensured.

The utility model relates to the technical field of vehicle engineering, and provides an exhaust pipeline, an engine and a vehicle, and the exhaust pipeline comprises a front cylinder group and a rear cylinder group. Wherein connectors, used for being connected with an engine, of a first manifold A, a second manifold A and a third manifold A of the front cylinder set are arranged at equal intervals, a gathering pipe A comprises a first section A and a second section A, the first section A is connected with the other end of the first manifold A and the other end of the second manifold A, and the second section A is connected with the other end of the second manifold A and the other end of the third manifold A; the guide lines of the first manifold A, the second manifold A and the third manifold A are arc curves, the guide line of the first section A is tangent to the guide lines of the first manifold A and the second manifold A, the guide line of the second section A is tangent to the guide lines of the second manifold A and the third manifold A, and the first section A and the second section A are connected through an arc chamfer; the rear cylinder set and the front cylinder set are arranged in an image mode with the center plane of the supercharger as the plane. Exhaust energy loss can be reduced, so that the engine is efficient and energy-saving.

In order to provide a trailer coupling in which the vehicle attachment unit is suitable for crumpling, it is proposed that the vehicle attachment unit should comprise a crumple unit, which is mountable on the vehicle rear below a bumper unit and has an impact body that extends transversely to a longitudinal center plane, which coincides with a vehicle longitudinal center plane, and deformation bodies arranged to either side of the longitudinal center plane, supporting the impact body in relation to the vehicle rear and maintaining a spacing therefrom, that the impact body of the crash unit should be connected to the trailer element, and that the crash unit should transmit to the vehicle rear all the forces that act on the trailer element when the trailer coupling is in use.

The utility model relates to the technical field of decorative materials, in particular to a GRG type fireproof decorative plate which comprises a plate body, four mounting seats are symmetrically and fixedly connected to the outer wall of the plate body relative to the vertical center face of the plate body, and two locking bolts are symmetrically connected to the mounting seats in a screwed mode. According to the utility model, the two insertion plates on the side wall of the plate main body can be inserted into the butt joint holes in the outer wall of another decorative plate, the locking columns on the insertion plates can firstly slide and abut against the inclined panels, then the locking columns can be inserted into the positioning holes, and the locking columns can be inserted into the sleeves under the extrusion of the extrusion springs; in this way, the two decorative plates can be installed in a butt joint mode, buffering protection can be conducted on the inserting plate through the two buffering plates in the fixing cover, the service life of the decorative plates is prolonged, the connection stability of the decorative plates is improved, the installation structure cannot be exposed outside, and therefore the influence on the attractiveness of the decorative plates is avoided.

The present application relates to a method for measuring a PCCP elbow, and particularly to a method for measuring the elbow angle of PCCP pipe fittings; it includes a left straight pipe, a left docking pipe, a right docking pipe and a right straight pipe; the inner diameters of the left straight pipe, the left docking pipe, the right docking pipe and the right straight pipe are all the same, and the outer diameters of the left straight pipe, the left docking pipe, the right docking pipe and the right straight pipe are all the same; the cross-section of the left docking pipe along the central plane is a right trapezoid. Due to the implementation of the above technical solution, in the present application, the ports of the left docking pipe corresponding to the oblique waist of the right trapezoid and the ports of the right docking pipe corresponding to the oblique waist of the right trapezoid are spot-welded together. By measuring the distance between specific punch marks, the elbow angle can be calculated, and the result is accurate. It can measure the actual manufacturing angle in advance during the welding and manufacturing process of the elbow, and can correct the manufacturing angle in a timely manner, avoiding large losses caused by difficulties in on-site installation or inability to install due to the inconsistency between the manufacturing angle and the design angle.

A transverse stabilization unit for a railway track (10) comprises a chassis (12) resting on at least two pairs of rollers (14, 16) defining a rolling plane (PR) and a median longitudinal plane (PL) of the chassis (12) perpendicular to the rolling plane (PR), each pair of rollers (14, 16) comprising a right roller (142, 162) and a left roller (141, 161) located respectively on a right side and a left side of the median longitudinal plane (PL) and intended to roll respectively on a right rail (22) and a left rail (21) of the railway track, the chassis (12) carrying a vibration exciter (18) with four unbalanced masses (1, 2, 3, 4), each of the four unbalanced masses being rotatable about an axis of rotation (A1, A2, A3, A4), the axes of rotation (A1, A2, A3, A4) of the four unbalanced masses (1, 2, 3, 4) being parallel to the same reference direction (A) of the chassis (12),the stabilization unit (10) being characterized in that the reference direction (A) is perpendicular to the rolling plane (PR) (Abstract figure: Figure 2),

Agricultural implement for mounting on a tractor, with working units (4) which can be driven by means of a mechanical drive train (12) from a tractor power take-off shaft, wherein said mechanical drive train (12) comprises a distribution gearbox (6) with at least two output shafts (9) extending to different sides, to which cardan shafts (11) can be connected for driving at least two working units (4), wherein the distribution gearbox (6), viewed in the direction of travel, is arranged behind said at least two working units, characterized in that the output shafts (9), each arranged horizontally and at an acute angle, are inclined at an angle Φ in the range of 30° to 60° to a vertical longitudinal median plane of the implement, wherein the output shafts (9) and an input shaft (7) together form a W-shaped arrangement.where the input wave (7) extends approximately midway between the output waves (9) in the V-shaped space spanned by the output waves (9).

The application provides a thermoplastic composite material rapid forming system and method, and belongs to the technical field of composite material forming. The system comprises a laminated laying device, a three-dimensional positioning device, a rapid preheating device, a special-shaped stamping device and a cutting post-processing device arranged in sequence along the conveying direction of a conveying track. A planar base tray moving along the conveying track is arranged on the conveying track. The planar base tray comprises an edge frame and a central plane, and the central plane is spliced by a plurality of detachable skeleton rods. The three-dimensional positioning device comprises a clamping fixing strip and an up-down surface pre-tightening device. The special-shaped stamping device comprises an upper die and a lower die, and the upper die and the lower die are located above and below the conveying track respectively and can move towards each other. Rapid automatic forming is realized through the linkage design of the planar base tray, the conveying track and the special-shaped stamping device.

The invention provides a polarizing element capable of improving transmittance of a transmission axis even if the incident angle deviation of light is large. A polarizing element (10) is provided with: a transparent substrate (11); and grid-shaped protrusions (12) which are arranged on one surface of the transparent substrate (11) at a pitch shorter than that of light waves of a used frequency band and extend in a predetermined direction. The grid-shaped protrusion (12) has a reflective layer (21) and an absorbing layer (22) in this order from the transparent substrate (11) side. The width of the absorbing layer (22) is substantially the same as the width of the reflecting layer (21) on the side facing the absorbing layer (22). In a cross-sectional view in the direction in which the grid-shaped protrusions (12) extend, a central surface (C2) that passes through the center of the absorption layer (22) in the width direction and a central surface (C1) that passes through the center of the reflection layer (21) in the width direction are spaced apart from each other by a predetermined interval.