284 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 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 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 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.

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.

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.

A vibration damper for damping vibrations of a motor vehicle component is disclosed. The vibration damper is passed through by a transverse center plane, and the vibration damper includes a retention apparatus that can be fixed to a motor vehicle component. In embodiments, the vibration damper has at least two receptors that each have an inner side facing the transverse center plane and an outer side facing away from the transverse center plane, has a damper mass with a central longitudinal axis, and has at least two elastomer springs. In embodiments, the elastomer springs couple the damper mass to the receptors with an ability to vibrate, and at least one of the elastomer springs has a connection portion, between the damper mass and respective receptor, that extends at least mainly externally with respect to the respective receptor.

This invention relates to the field of parts processing equipment technology, and discloses a modular assembly and welding equipment for metal chassis parts. The equipment includes a processing table with adjustment slots on both sides of the top center of the processing table. A central plane seat, movable forward and backward, is slidably connected within each adjustment slot. A workpiece positioning mechanism, mounted on the processing table, is used to position the vertical columns and internal partitions of the chassis to be welded before processing. By adding and setting the pre-processing mechanism, the internal partitions can be uniformly preheated throughout the entire area. This method not only avoids softening and deformation of the sheet metal caused by localized overheating, but also slowly releases the residual lattice stress from previous bending and stamping processes, laying the foundation for subsequent welding shrinkage balance. Simultaneously, pulsed current further enhances the stress release effect, maintaining the original mechanical properties of the partitions without additional heat input and solving the problem of pre-processing lattice distortion.

The utility model provides a locomotive and train pipe bevel protractor, and relates to the technical field of locomotive and train pipe angle measurement. The locomotive train pipe bevel protractor comprises a leveling assembly and an angle regulator. In the first direction, the leveling assembly is opposite to the center face, in the second direction, of the vehicle body, the leveling assembly comprises an adapter and a horizontal regulator, the horizontal regulator is arranged on the adapter and connected with a cowcatcher of the vehicle body, the adapter comprises a horizontal part, and the horizontal regulator is used for keeping the horizontal part horizontal. The angle adjuster is provided with angle scale values and a pointer, the angle adjuster is arranged on the horizontal part, so that when the horizontal part is kept horizontal, the surface, provided with the angle scale values, of the angle adjuster is horizontal, the pointer corresponds to a preset angle on the angle scale values, and the angle adjuster is used for adjusting the deflection angle between the train pipe and the central plane; the deflection angle is equal to the preset angle. The locomotive train pipe bevel protractor can solve the problem of poor interface sealing caused by difficult adjustment of the train pipe angle.

According to the coil stock forklift, in the embodiment, the coil stock forklift is used for carrying a paper roll of gypsum covering paper and comprises a movable vehicle body, a portal is fixed to the front side of the movable vehicle body, a lifting frame is slidably connected to the portal, the front side of the lifting frame extends forwards to form at least two lifting arms, and the at least two lifting arms are arranged on the lifting frame in an inferior arc shape; the at least two lifting arms are symmetrically arranged left and right relative to the longitudinal center plane of the lifting frame, the at least two lifting arms are used for abutting against the cylindrical surface of the paper roll, and a lifting mechanism for driving the lifting frame to slide up and down is arranged on the movable trolley body; the lifting arms are arranged to be capable of being inserted into gaps between the adjacent paper rolls when the paper rolls are taken and placed on the paper stack. According to the roll stock forklift, the at least two lifting arms arranged in the arc shape are matched and abut against the cylindrical surface of a paper roll, the gravity of the paper roll is shared, the situation that the bearing capacity of a single lifting arm is large is avoided, then the structural strength requirement of the lifting arms is lowered, and when the paper rolls are taken and placed on a paper stack, gaps formed by stacking the paper rolls are effectively utilized; the paper roll paper surface can be prevented from being damaged during taking and placing.

The application discloses a kind of double-layer multileaf collimator leaf amplification factor adjustment methods, comprising: the grating blade stroke is segmented according to preset interval;Respectively, the upper grating and the lower grating are independently calibrated, the equal center plane field width of each segmented point is measured, and the amplification factor is calculated;For the segmented point that cannot be directly measured, segmented linear interpolation is used to complete;Amplification factor is written into control system and the whole stroke accuracy is verified through multi-field strip field.The application fits the nonlinear characteristics of single-focusing grating amplification factor by segmented measurement, adapts to the difference of double-layer structure by independent calibration of upper and lower layers, realizes full-stroke coverage by interpolation completion, and finally improves the positioning accuracy of field boundary, significantly improves the accuracy and safety of radiotherapy.

The utility model discloses a conical probe and an auxiliary fixing device of a drilling peeping instrument for a coal mine tunnel. The plane camera is mounted in the center of the small-diameter end face of the probe; the plane annular lamp is located on the outer side of the plane camera. The plurality of curved-surface cameras are circumferentially and uniformly mounted at the middle section of the side surface of the probe; the curved-surface annular lamp is mounted outside the bottom of the probe side surface; the probe column body comprises a probe upper column body, a radial telescopic positioning assembly and a probe lower column body; the front end of the probe upper cylinder is fixedly connected with the large-diameter end of the probe; the radial telescopic positioning assembly is composed of a plurality of radial mounting holes annularly and uniformly formed in the cylinder body of the probe upper cylinder and a plurality of telescopic supporting mechanisms annularly and uniformly distributed and correspondingly arranged in the radial mounting holes; the number of the radial telescopic positioning assemblies is two. And the front end of the probe lower column body is rotatably connected to the rear end of the probe upper column body through a middle pivot. The device can effectively guarantee the peeping stability of a large-size drill hole, and can obtain a high-quality drill hole image.

The present application relates to the field of lighting technology. The shadowless lamp integrated in the ceiling comprises a shadowless lamp base body, the shadowless lamp base body is installed on the ceiling, the shadowless lamp base body comprises a frame, LED lamps arranged in an up-down mode and a lens are installed on the frame, the top of the lens is provided with a light guide groove with an opening facing upward, the inner wall of the light guide groove comprises a transmission area, a refraction area, a first transition connection area, a first reflection area and a second transition connection area arranged in sequence from inside to outside, the second transition connection area of the light guide groove is connected with the outer wall of the lens, the outer wall of the lens is provided with a second reflection area, a hollow cavity is arranged in the center of the lens, the lower side of the hollow cavity is a plane, and the upper side of the hollow cavity comprises a central plane and an outer convex curved surface arranged in an inner-outer mode. The structure of the lens base body is optimized, the light reflected by the light source located in the center of the top of the lens base body is collected and processed, a cylindrical light is formed, and the light collecting effect is improved.

A crane for lifting a load includes a stay wire system. A guide rail (60, 61) is secured to the crane boom member and a travel member (80, 81) is mounted on the guide rail. A transverse beam (90) is supported by the travel member so as to extend in a direction transverse to the central plane of the crane jib member. Each of the travel members is provided with a sliding support (120) for a transverse beam (90) between the axial ends to allow a variation in the spacing between the first and second travel members. The first stay wire assembly and the second stay wire assembly are each configured such that, in use, the first stay wire (95) and the second stay wire (96) extend from axially spaced locations on the cross beam (90) to a load.

The invention relates to a sensor assembly for a motor vehicle, which can be fixed on a windshield (6) of a motor vehicle and comprises a holder (8), a camera (10) and a rain-light-sunlight-moisture sensor (12) having a main body (14) and a lateral protrusion (16). The lateral protrusion (16) has an opening (18) for measuring the air humidity. The longitudinal extension of the lateral protrusion (16) extends obliquely with respect to a longitudinal center plane (M) of the sensor assembly. The invention also relates to a mirror assembly comprising such a sensor assembly.

The present invention relates to a double-sided negative turning insert for metal cutting, comprising a body including an upper surface (1) with a major upper support surface (14), a lower surface (2) with a major lower support surface (15), a peripheral side surface (3) connecting the upper surface (1) and the lower surface (2), and a central plane located between the upper surface (1) and the lower surface (2). The peripheral side surface includes a total of three corner side surfaces (4), each of which is located at a respective corner of an imaginary triangle (10) having three sides when viewed from above. The peripheral side surface includes a total of three major side surfaces (5), each of which extends from a respective associated first corner side surface (4) to a respective associated second corner side surface (4) along a respective associated one of the three sides of the imaginary triangle (10). At least one of the three major side surfaces (5) includes a primary support surface (13). At least one major side surface (5) further comprises a total of a pair of oppositely facing secondary support surfaces (21), each of which extends inward relative to a respective one of the primary support surfaces (13), and each of which extends perpendicular to the central plane.

The invention relates to a scaffolding support (10) for scaffolding, which extends along a scaffolding support longitudinal axis (13) and comprises an upper flange (11) and a lower flange (12). The upper flange (11) contains a supporting profile (30) comprising supporting limbs (30.1, 30.2) which extend on either side of a longitudinal central plane (31) at a transverse distance from one another and each extend upwards away from the upper transverse wall (17). The supporting limbs (30.1, 30.2) each comprise a free supporting limb end (32.1, 32.2) comprising a bearing edge (33.1, 33.2) for bearing a bearing device. The supporting limbs (30.1, 30.2) have supporting limb parts (37.1, 37.2) which are each delimited, on a supporting limb outer side (38.1, 38.2) pointing away from the respective other supporting limb (30.2, 30.1), by a supporting limb outer surface (39.1, 39.2) extending along the longitudinal central plane (31), and each extend, when viewed in a cross-section (22) perpendicular to the scaffolding support longitudinal axis (13), from the respectively associated supporting limb outer surface (39.1, 39.2) or from a supporting limb bearing surface (40.1, 40.2) for bearing a bearing device, which supporting limb bearing surface adjoins the supporting limb outer surface transversely to the respective other supporting limb part (37.2, 37.2), upwards away from the upper transverse wall (17) and inwards (68.1, 68.2) towards the longitudinal central plane (31) of the supporting profile (30).

Provided is an orthodontic appliance, comprising a fixed base (1) that can be bonded and fixed to a tooth surface, a movable wing (2), and a spring (3). The movable wing (2) is slidably positioned on the fixed base (1); a bottom surface of the fixed base (1) is machined with a bonding pattern, one end of the surface is machined with a wing base (12), and the middle of the wing base (12) is provided with a sliding groove (121) in a direction of the central plane; the movable wing (2) comprises an occlusal splint (21) and a sliding rod (22), and the sliding rod (22) is positioned in the sliding groove (121) and can move back and forth along the sliding groove (121); the spring (3) is sleeved on the sliding rod (22), and one end of the spring (3) abuts against the wing base (12) and always maintains a tendency in which the movable wing (2) is away from the wing base (12); the occlusal splint (21) can move toward the wing base (12) end under the driving of the tooth occlusal force and generate an orthodontic thrust on the wing base (12) by means of the spring (3). Using the occlusal splint (21) on the movable wing (2), the occlusal force generated by each occlusal action is picked up and converted into an adduction force on the anterior teeth, thereby forming a dynamic orthodontic process and minimizing the impact on the posterior teeth.

Convertible top of a convertible vehicle, comprising a convertible top cover (11) and a convertible top frame (12) which is adjustable between a closed position, in which a vehicle interior is spanned, and a stowed position in which the vehicle interior is open upwards, and which, with respect to a vertical longitudinal center plane of the convertible top, has on both sides a linkage arrangement (13) comprising two main links (20, 21) which are pivotably mounted on a vehicle-fixed main bearing (24) and of which one is driven by means of a main drive, wherein between the linkage arrangements (13) arranged on both sides surface bows extend, of which a first is a front bow (14), a second is a front center bow (15), a third is a rear center bow (16) and a fourth is a rear window bow (17), characterized in thatthat in the stowed position the rear center bow (16) is arranged below the rear window bow (17) and that two adjusting links (58, 59) are articulated to the rear center bow (16), one of which is driven by means of a drive element and at least one of which is pivotably mounted on the main bearing (24).

The invention provides an electric connector, which is provided with an insulating body with a butt joint space and a plurality of power supply terminals with a plurality of terminal groups, and each terminal group is provided with a holding part fixed in the insulating body and a contact part protruding into the butt joint space in the same direction; the terminal group comprises an upper terminal group of which the holding part is positioned on the upper side of the horizontal central plane of the butt joint space and a lower terminal group of which the holding part is positioned on the lower side of the horizontal central plane of the butt joint space; each of the upper terminal group and the lower terminal group comprises a first power supply terminal and a second power supply terminal, wherein the holding part of the first power supply terminal is close to the horizontal central plane of the butt joint space, and the holding part of the second power supply terminal is far away from the horizontal central plane of the butt joint space. And the first power supply terminal is also provided with a turning part which is positioned between the contact part and the holding part and protrudes towards the second power supply terminal in the same terminal group. The electric connector can transmit large current and can effectively improve the heating condition of the power supply terminal pair.