2458 results about "Bearing surface" patented technology

The invention discloses an assembly demagnetizing bearing device, and relates to the technical field of automation equipment. The carrier is fixedly arranged on the mounting seat and is provided with a bearing surface; a channel extending in the first direction is arranged in the carrier. A magnetic attraction piece is arranged in the channel; in the first direction, the size of the magnetic attraction piece is smaller than that of the channel; the magnetic attraction piece can move in the channel so as to be switched between a material attraction position close to the bearing surface and a material discharging position far away from the bearing surface; the carrier is provided with a waiting position where the bearing surface is horizontally arranged and a working position where the bearing surface is vertically arranged; the two first stop blocks are slidably connected to the mounting base in the second direction, and the two first stop blocks are located on the two sides of the carrier in the second direction respectively; the second direction is parallel to the bearing surface; the second stop block is slidably connected to the mounting seat and faces the bearing surface; and the first driving piece is connected with the mounting seat. According to the assembly demagnetizing bearing device, other workpieces can be conveniently assembled on the side face of the workpiece.

A kit includes an adjustable chock provided with a first component having screw threads and with a second component having screw threads cooperating with the screw threads of the first component and having a lower bearing surface, and with a bearing element provided with a lower bearing surface in contact with an upper bearing surface of the first component, and with an upper bearing surface. The kit further includes at least one friction ring adapted to be mounted against the lower bearing surface of the second component or against the upper bearing surface of the bearing element.

The invention discloses a bidirectional active follow-up loading device and a control method thereof.According to the device, through the synergistic effect of a loading mechanism, a spherical hinge and a lower-layer follow-up mechanism, rapid and accurate compensation can be achieved according to the deviation angle, active detection and compensation of inclination angles in two directions are achieved, and the loading efficiency is improved. The loading force is always kept consistent with the normal direction of the loading force bearing surface; according to the method, the compensation displacement of the mobile platform is calculated through the inclination angle of the cross bearing, and the double-layer follow-up mechanism is driven to compensate the offset distance between the X axis and the Y axis, so that the loading direction is always kept consistent with the normal direction of the loading force bearing surface, and dynamic compensation in multiple directions is realized, thereby ensuring that the direction of the loading force is always kept accurate; the compensation amount is fed back and adjusted in real time, the influence of nonlinear change of the effective length of the loading hydraulic cylinder on the loading force is reduced, the compensation process in the control method is smooth, and the response speed and the compensation precision are improved.

The invention discloses a meter-scale leveling and aligning static pressure rotary table shaft system structure expanding torque in the radial direction and a method. The meter-scale leveling and aligning static pressure rotary table shaft system structure comprises a base, a lower plate, an upper plate, a leveling structure, an aligning structure and a workbench. A lower plate is arranged on the base, an upper plate is arranged on the lower plate, the upper plate is fixedly connected with a rotor, and the rotor is directly connected with a motor rotor; the top end of the upper plate is vacant, and the bottom end of the upper plate is provided with an adsorption structure and a supporting surface and matched with the top end of the lower plate; the leveling structure and the aligning structure are both mounted on the lower plate and are arranged on the same horizontal plane; according to the rotary table shaft system structure, a torque transmission path expanding in the radial direction is adopted, the extending amount of an aligning ball head is controlled through an aligning structure, a lower plate is promoted to move in the opposite direction of the extending direction of the aligning ball head relative to an upper plate, and axial aligning of a workbench and a rotor is achieved; and the leveling structure is used for positioning the plane of the workbench through three points, so that the workpiece is leveled. According to the invention, the leveling and aligning functions of large-size high-precision rotary tables with meter-scale calibers and above can be realized, and the table-board distance of the rotary table is reduced.

The invention discloses locking assembly equipment and an intelligent glasses assembly line body, and relates to the technical field of intelligent wearable device.The locking assembly equipment comprises a machine table, a conveying device, a turnover device, a locking device and a carrying device.The conveying device comprises a movable base, and the turnover device comprises a turnover platform rotationally installed on the movable base; in the rotating process of the overturning platform, the overturning platform has a material bearing state enabling the bearing face to be arranged upwards and a locking matching state enabling the bearing face to be arranged towards the side, and when the movable base is located at the locking station and the overturning platform is in the locking matching state, the locking electric screwdriver assembles the glasses frame and the glasses legs through screws. And the carrying device is used for transferring the circulation tool with the to-be-assembled intelligent glasses to the overturning platform in the material bearing state, and moving away the circulation tool which is transferred to the discharging station and is in the material bearing state on the overturning platform. The intelligent glasses are locked after being turned to a proper angle, so that the use of a complicated locking mechanism can be avoided, and the locking efficiency is improved.

The invention discloses an automatic copper pipe tooth rolling production line, and belongs to the technical field of copper pipe tooth rolling machining. The gear rolling production line comprises a plurality of gear rolling machines, a feeding line and a feeding assembly. The feeding assembly comprises a feeding conveying mechanism, a jacking distributing mechanism, a feeding buffering mechanism and a longitudinal conveying mechanism. The feeding conveying mechanism comprises a feeding frame and a plurality of feeding conveying units, the feeding temporary storage mechanism comprises a feeding temporary storage frame, and a temporary storage part of the feeding temporary storage frame and a bearing surface of a discharging guide part are obliquely arranged; the jacking and distributing mechanism comprises a jacking and distributing unit, and the jacking and distributing unit comprises a first-stage jacking frame and a second-stage jacking frame. The position layout of the tooth rolling machines is reasonable, the space of a plant workshop is fully utilized, the feeding requirements of multiple tooth rolling machines can be met by arranging the feeding assembly on one layer and one feeding line in the workshop, the production rhythm of the multiple tooth rolling machines can be met, copper pipes are stable, reliable and high in conveying efficiency in the conveying process, the falling risk is avoided, and the production efficiency is improved. And the safety of equipment and personnel is ensured.

The invention relates to a recirculator (30) for a nut (12) of a ball screw mechanism (1), comprising an annular body (32) having a reference axis (300) intended to be aligned with a helical axis of the nut (12), the annular body (32) comprising a bearing surface (36), and a guide structure (34) arranged on the bearing surface (36), the bearing surface is configured to bear a nut (12) against the ball screw mechanism (1) in a bearing direction having an axial component parallel to the reference axis (300), the guide structure is configured to guide the balls in the circulation path opening at a first guide end (62) into a recirculation channel of the nut (12) and at a second guide end (72) onto a raceway (116) defined by a thread of the nut (12), characterized in that the bearing surface (36) lies at least partially in a cross-sectional plane (130) intersecting the recirculation path and perpendicular to the reference axis (300).

The invention discloses a polystyrene plastic plate compression resistance testing device and method for refrigerator liner production, and relates to the technical field of refrigerator liner production. The device comprises a testing machine and a plastic plate, and further comprises a positioning unit which comprises a positioning assembly and a moving assembly; the pressure control hydraulic cylinder is arranged on the testing machine; the pressure applying testing unit comprises an adjusting assembly and a testing assembly, the adjusting assembly is used for adjusting the size of the pressed face of the plastic plate to achieve multi-area pressure applying, and the testing assembly is used for detecting and judging the testing result. The device has the advantages that the size of the compression surface of the plastic plate can be flexibly changed when the compression resistance of the polystyrene plastic plate is detected, the compression resistance of the plastic plate under different compression surfaces can be tested, the stress position of the plastic plate can be flexibly changed, the plastic plate cannot be damaged during testing, multi-position testing can be realized on the same plastic plate, and the testing efficiency is improved. The number of test samples is larger, and the test result is more accurate.

The invention discloses a concrete quality detection device, and relates to the technical field of concrete detection, the concrete quality detection device comprises a detection table and a fixing cylinder, the fixing cylinder is installed at the center position of the detection table in a penetrating manner, a supporting seat is installed at the position, located on the rear side of the fixing cylinder, of the detection table, and a hydraulic cylinder is installed at the top of the supporting seat; the movable end of the hydraulic cylinder is connected with a pressing plate, and an auxiliary mechanism is arranged in the fixed cylinder and used for transferring a concrete block sample and cleaning the crushed concrete block sample. And the orientation of the concrete block sample is adjusted, so that the polished flat surface is in contact with the pressing surface of the pressing plate and the bearing surface of the bearing plate, uniform pressure application to the concrete block sample during compression resistance detection is ensured, and the situation that detection data are wrong due to the fact that pressure intensively acts on convex points of the concrete block sample is avoided.

Examples include a pile cutting apparatus including a cutting device for cutting a sheet pile, with a front pile bearing surface, a rear pile bearing surface, and a cutting gap arranged therebetween. A table plane contains the front pile bearing surface. The cutting device further includes a movable upper blade, a lower blade including a cutting edge, and a cutting aid for fixing sheet piles that is upstream from the upper blade along a transport path for transporting sheet piles. A movable support element has a contact surface for supporting sheets and is movable between a support position and a disposal position. The contact surface, when the support element is arranged in the support position, is arranged in and / or beneath the table plane, and is closer to the cutting edge when the support element is in the support position than when the support element is in the disposal position.

The invention provides a rigidity-adjustable bearing platform, which can realize multi-gear adjustability of bearing rigidity, can adjust the inherent frequency of the whole load after being connected with the load, and belongs to the related technical fields of mechanical engineering, aerospace, constructional engineering and the like. According to the platform, a plurality of parallel flexible supporting paths are arranged between a mounting surface and a bearing surface, and different supporting rigidities of the platform are achieved by locking and releasing the flexible supporting paths. The principle is simple and reliable, the structural form is flexible and changeable, and the supporting rigidity is not affected by environmental factors.

A hinge assembly for a door-in-door assembly includes a door plate, a cabinet plate, and a thimble. The thimble has a wall having an inner bearing surface and an outer bearing surface, the inner bearing surface defining a first passage. The door plate is supported for rotation at the outer bearing surface. The cabinet plate includes a pivot pin that is supported for rotation at the inner bearing surface.

The embodiment of the utility model discloses a driving wheel device and cleaning equipment, and the driving wheel device comprises a driving wheel assembly which comprises a first supporting part which is provided with a first connecting part and a second connecting part which are located in different areas; the first connecting part is used for being rotatably connected with a machine body of the cleaning equipment; the driving wheel is rotatably arranged on the first supporting piece and is used for being in contact with a bearing surface; the traction piece is used for being movably arranged on a machine body of the cleaning equipment; the traction piece is connected with the second connecting part, and the traction piece is used for enabling the first supporting piece to rotate relative to the machine body so as to adjust the height of the portion, protruding out of the machine body, of the driving wheel; wherein the traction piece is of a non-elastic structure.

A clutch for lifting a concrete component, including a toroidal connector, a latch movable relative to the toroidal connector between a disengaged condition and an engaged condition, and a coupler for coupling the toroidal connector to a lifting apparatus, wherein the toroidal connector has a circular seat for sitting upon a circular upper surface of a head of and anchor coupled to the toroidal connector, wherein the circular seat terminates in a radial bearing surface for abutment with a castellation of the anchor.

The invention discloses a transverse conveying device for pipe fittings, and belongs to the technical field of pipe fitting conveying. The pipe fitting conveying device comprises a pipe fitting conveying mechanism, and the pipe fitting conveying mechanism comprises a conveying frame, a plurality of conveying rollers, a conveying roller driving mechanism, a transverse conveying mechanism arranged on one side or two sides of the conveying frame and a lifting mechanism used for jacking up pipe fittings on the conveying rollers. The transverse conveying mechanism comprises a conveying arm shaft, a plurality of transverse conveying arms and a rotation driving mechanism, a guide mechanism used for guiding the pipe fittings to the transverse conveying arms is further arranged on the conveying frame, the guide mechanism comprises a plurality of guide plates, the guide plates are arranged in the length direction of the conveying frame, and the bearing surfaces of the guide plates are obliquely arranged in a mode that the inner portions are high and the outer portions are low. The overall layout is compact, the workshop height does not need to be adjusted, the workshop construction cost is reduced, the pipe conveying process is stable, and the safety of equipment and personnel is ensured; the pipe fitting conveying process is easy to operate, and the labor cost and the possibility of misoperation are reduced.

The utility model discloses a cleaning machine with a rotating assembly, and belongs to the technical field of cleaning appliances, the cleaning machine comprises a floor brush shell, a cleaning part and the rotating assembly, and the cleaning part and the rotating assembly are arranged on the floor brush shell; the rotating assembly rotates relative to the floor brush shell so that the scraping piece can be provided with a dirt scraping position abutting against the cleaning piece and a separation position separated from the cleaning piece, the rotating assembly further comprises a rotating part with a first arc-shaped face, the floor brush shell is further provided with a liquid separation piece, the liquid separation piece is provided with a second arc-shaped face, and the first arc-shaped face is in relative sliding fit with the second arc-shaped face. The arrangement of the first arc-shaped surface and the second arc-shaped surface provides a larger stress surface for the rotation of the rotating assembly, and the acting force borne by the rotating assembly during rotation is uniformly distributed to the contact surface of the first arc-shaped surface and the second arc-shaped surface, so that the possibility of stress concentration in the rotating process of the rotating assembly is reduced; and guarantee is provided for the structural strength of the rotating assembly.

The invention relates to the technical field of semiconductor measurement, in particular to a bearing device which comprises a chuck provided with a vacuum adsorption part, and the vacuum adsorption part is provided with a bearing surface; the vacuum adsorption part comprises a central part and an edge part surrounding the central part, and the edge part comprises at least one annular part; a first air passage and at least one second air passage are arranged in the vacuum adsorption part, the first air passage penetrates through the central part, the second air passage extends from the central part to the edge part, and the second air passage is provided with an air inlet hole located in one side of the bearing surface and an air outlet hole far away from one side of the bearing surface; an air inlet hole of the second air channel is located in the annular part, and an included angle exists between a connecting line of a starting point of the second air channel and the center of the vacuum adsorption part and a connecting line of an end point of the second air channel and the center of the vacuum adsorption part. According to the invention, the adsorption stability of warped wafers in different shapes can be improved at least.

A door hinge for a vehicle door (4), comprising a door-side leaf (11) and a body-side leaf (10), which are pivotably connected to each other about a hinge axis (Z) via a joint (G) having a hinge pin (12), wherein each of the leaves (10, 11) has a hinge block (14, 16) with a hinge eye (15, 17) for receiving the hinge pin (12) and a mounting plate section (13, 18), is characterized in that the door-side leaf (11) is provided with a clamping jaw area (18) facing the vehicle door (4) with at least one clamping jaw having a bearing surface (19, 19', 19") designed to abut the vehicle door (4) and has a through-opening (18') for receiving a clamping bolt (32) and that a pressure plate (31) opposite the clamping jaw area (18) is provided. which can be connected to the clamping bolt (32) at a connection point (35), wherein the clamping bolt (32) is designed,to clamp the pressure plate (31) against the clamping jaw area (18) in a tensioned state.

The invention provides a wafer pre-alignment device, semiconductor equipment and a pre-alignment method. The wafer pre-alignment device comprises a main body frame, a rotating mechanism, a centering mechanism and an alignment assembly. The rotating mechanism is installed on the main body frame and comprises a rotatable suction cup, the rotating axis is in the Z direction, and the upper surface of the suction cup is configured to be a bearing face capable of achieving negative pressure adsorption. The centering mechanism is installed on the main body frame and is configured to drive the position of the wafer placed on the suction cup to be adjusted so that the center of the wafer can coincide with the center of the bearing face. The alignment assembly comprises a reflection part and an alignment sensor, the reflection part is arranged below the bearing surface, the alignment sensor is erected above the bearing surface, and the alignment sensor directly faces the reflection part. After the center of the wafer coincides with the center of the bearing surface and the wafer rotates to a preset angle, the light beam path of the alignment sensor passes through the vacant area at the edge of the wafer. According to the invention, the pre-alignment process of the wafer is realized through a non-visual method, the pre-alignment efficiency is improved, and the pre-alignment precision can be effectively ensured.

The utility model discloses a rotor module and a logistics conveying line. The mover module comprises a main body piece, an air pump and an electromagnetic valve, the main body piece comprises a bearing face used for making contact with a workpiece, and an adsorption hole is defined in the bearing face; a first air outlet and a first air inlet are defined in the air pump; a first gas path communicated with the adsorption hole, a first gas outlet pipeline communicated with the first gas outlet and a first gas inlet pipeline communicated with the first gas inlet are defined by the electromagnetic valve; and the electromagnetic valve is configured as follows: one of the first air outlet pipeline and the first air inlet pipeline is communicated with the first air path, so that the adsorption hole sucks air or discharges air. According to the rotor module, the air pump can be controlled through the electromagnetic valve to achieve the inflation and air suction functions, the time needed for workpiece loosening is greatly shortened, and the conveying efficiency is improved.

The invention relates to the technical field of hoisting equipment, and provides a lithium battery unmanned monorail hoist which comprises a suspension track and a hoist assembly, the hoist assembly comprises a car body unit, a hoisting and conveying unit and a suspension unit, the suspension unit is arranged on the suspension track, and the suspension unit comprises a power suspension unit and a load suspension unit. The vehicle body unit is connected with the power suspension unit, the hoisting conveying unit is connected with the load suspension unit, the load suspension unit comprises a suspension beam, load frames, load wheels and guide wheels, the load frames are arranged at the two ends of the suspension beam and comprise mounting ends on the two sides of a suspension rail, and the guide wheels and the load wheels are arranged at the mounting ends. The guide wheels abut against the guide side faces of the suspension rails, and the load-carrying wheels abut against the load-bearing faces of the suspension rails vertically. The problems that in the prior art, when a traveling wheel body of a suspension type rail crane faces a heavy load, due to the fact that the contact face is incomplete, the service life of the wheel body and components of the wheel body is prolonged, and the operation stability is poor are solved.

The invention discloses wafer cleaning equipment, a wafer chuck thereof and a wafer cleaning method, and belongs to the technical field of semiconductor process equipment. The wafer chuck comprises a chuck base body, an air injection assembly and a plurality of wafer lifting shafts, the air injection assembly and the wafer lifting shafts are arranged on the chuck base body, the chuck base body is provided with a bearing face used for bearing a wafer, and an air outlet of the air injection assembly is located in the central area of the bearing face and used for injecting air between the bearing face and the wafer. The multiple wafer lifting shafts are distributed on the periphery of an air outlet of the air injection assembly in the circumferential direction of the bearing face in a surrounding mode, each wafer lifting shaft can move relative to the chuck base body, each wafer lifting shaft is provided with an arc-shaped inclined table, each arc-shaped inclined table is provided with an inclined extending face extending in the circumferential direction of the corresponding wafer lifting shaft, and the inclined extending faces are used for bearing the edge of a wafer. When the wafer lifting shaft moves relative to the chuck base body, the wafer can move to different height positions along the inclined extending face. According to the invention, the height of the wafer can be accurately positioned, and the wafer cleaning efficiency is improved.

The invention relates to a system comprising at least one lightweight pallet and multiple similarly designed containers. Each container has four side walls and container base. The system includes stacking pins as separate components. The pallet features an upper deck with a bearing surface, supported by feet and / or runners, and incorporates first stacking pin receivers. Each container base is provided with at least one second stacking pin receiver. These receivers are dimensioned for insertion of a stacking pin, allowing a container to be securely fixed to the pallet. The stacking pin can be stably arranged in two positions: in the first, it engages the first receiver on the container's side while protruding over the bearing surface to engage the second receiver; in the second, it is countersunk in the first receiver, forming a clamping fit with the upper deck or its thread.

The utility model discloses a folding ladder stand device capable of being used as a bearing surface, and relates to the technical field of semitrailer ladder stands. The carriage comprises a carriage body and a plurality of ladder stand bodies, a plurality of ladder stand lugs are fixedly arranged at the tail end of the carriage body, ladder stand rotating shafts are fixedly installed at one ends of the ladder stand bodies, sleeves are arranged on the outer walls of the ladder stand rotating shafts in a sliding mode, and a carriage rotating shaft is rotatably installed between every two adjacent ladder stand lugs. The outer walls of the multiple carriage rotating shafts are fixedly provided with linkage butt straps. According to the utility model, the ladder stand body which is horizontally aligned with the cargo carrying surface of the carriage body after being folded is arranged, so that the space of the cargo carrying surface of the carriage body is not occupied, and under the condition that the total length of a vehicle is consistent, the size of the cargo carrying surface of the vehicle using the ladder stand body is larger, and the ladder stand body can serve as a part of the cargo carrying surface to load more cargoes; and a fixing ring or a container lock and other devices can be placed on the upper plane of the crawling ladder body, so that the diversity of cargos is met.

A forklift assembly is provided and generally includes a self-propelled frame having a pair of wheel assemblies, each providing a selectively driven wheel, the frame providing a carriage receiving assembly between the pair of wheel assemblies; an extension assembly having a first end and a second end, the first end of the extension assembly being pivotably connected to the frame; a control system; and a carriage assembly having a prong assembly, the carriage assembly being operably connected to the second end of the extension assembly and configured to be controllably positioned within the carriage receiving assembly. The wheel assembly having a selectively engageable drive system with a motor, a clutch assembly, a driveshaft having a first bearing surface and a second bearing surface and configured to be rotated by the motor, and a locking mechanism configured to selectively urge the driveshaft to shift in either a first direction or a second direction. The self-propelled frame having an articulating tow hitch; and at least one rear wheel assembly.

The utility model discloses a force sensor. The force sensor comprises an elastic body, a supporting structure, a circuit board and a sensitive element, the elastic body comprises a first end and a second end which are opposite, a plurality of bumps arranged at intervals are convexly arranged on the end surface of the first end, through grooves penetrating through the bumps are formed in the side walls of the bumps, the sensitive element is attached to the surface of one side, deviating from the end surface of the first end, of each bump, and the circuit board is electrically connected with the sensitive element. The second end is provided with a stress ring surface, the side wall of the elastic body is convexly provided with a fixed ring surface, the stress ring surface and the fixed ring surface are oppositely arranged in the thickness direction of the elastic body, the stress ring surface is a pressure-bearing surface of the force sensor, and the fixed ring surface is a fixed constraint surface of the force sensor. The first end of the elastic body is provided with the protruding block in a protruding mode, when the stress ring face is stressed, the design of the protruding block and the through groove can enable the mounting position of the sensitive element to generate large stress changes, the sensitive element is attached to the surface of the side, away from the end face of the first end, of the protruding block, and the stress changes can be captured more accurately.

The utility model discloses a magnetic attraction fixing carrier, which relates to the field of fixing devices and comprises a bearing block, a first check block, a second check block, a third check block, a fourth check block and a driving assembly. The bearing block is provided with a bearing surface for bearing a workpiece; a containing hole extending in the vertical direction is formed in the bearing block. A magnetic attraction piece is arranged in the accommodating hole; the magnetic attraction piece can move in the accommodating hole; the first check block and the second check block are fixedly arranged on the bearing surface, the first check block is located on one side of the bearing surface in the first direction, and the second check block is located on one side of the bearing surface in the second direction; the third check block is movably arranged, and the third check block is arranged opposite to the second check block in the second direction; the two fourth stop blocks are movably arranged; the fourth check blocks are located above the bearing surface, and the two fourth check blocks are oppositely arranged in the second direction; and the driving assembly is simultaneously connected with the two fourth stop blocks. According to the magnetic attraction fixing carrier, the workpiece can be stably fixed, and meanwhile the surface, needing to be machined, of the workpiece is exposed.

A fastened member configured to be fixed to a vehicle body-side member by a screw member includes: a base including a reference surface configured to receive a bearing surface of the screw member; an insertion hole provided in the base and configured to insert the screw member therethrough, and a protruding portion protruding from the reference surface. The protruding portion includes a tilted surface tilted so as to become higher along a rotation direction in which the screw member is tightened. When the screw member is tightened, the protruding portion and the base are sandwiched between the vehicle body-side member and the bearing surface and are plastically and elastically deformed.

A negative pressure oil leakage resisting structure of a turbocharger compressor relates to the technical field of internal combustion engine supercharging devices and comprises a rotatably arranged shaft seal, a fixedly arranged impeller sleeve seat is sleeved outside the shaft seal, and a first mechanical seal and a second mechanical seal are axially arranged between the outer surface of the shaft seal and an inner hole of the impeller sleeve seat. The shaft seal is provided with a shaft seal radial extending section which is annularly arranged, the impeller sleeve seat is provided with an impeller sleeve seat protruding section which is annularly arranged, the impeller sleeve seat protruding section wraps the shaft seal radial extending section, and a third mechanical seal is arranged between the impeller sleeve seat protruding section and the shaft seal radial extending section. The problem that in the prior art, lubricating oil gushing out of a gap between a thrust bearing and the bearing face of a shaft seal can enter a second cavity under the negative pressure suction effect of a radial gap, then enter a mechanical seal structure and then enter a gas compressor flow channel, and negative pressure resisting failure is caused is solved.

A wind turbine planet gear shaft has a shaft body with an outer surface, a segment of the outer surface being a slide bearing surface configured to form a radial slide bearing with an inner opening of a planet gear. The slide bearing surface has a first portion configured as a non-load-bearing zone and a second portion configured as a load-bearing zone and exactly one axially elongate oil pocket in the slide bearing surface, that oil pocket being located in the non-load-bearing zone. An oil supply channel in the shaft body has a first end in communication with the oil pocket, and first and second oil return channels in the slide bearing surface each have a first end at a longitudinal end of the oil pocket and a second end open to ambient air.