819 results about "Camshaft" patented technology

The invention discloses a continuous passing type quenching conveying device for diesel engine camshafts in the technical field of diesel engine camshaft machining. The quenching conveying device comprises a first conveying mechanism, a plurality of camshaft fixing mechanisms and a plurality of quenching mechanisms, wherein the camshaft fixing mechanisms and the quenching mechanisms are arranged on the first conveying mechanism. Wherein the quenching mechanism comprises a bearing frame connected with the first conveying mechanism, a driving device arranged on the bearing frame and a split type induction coil connected with the driving device, and the split type induction coil comprises two sets of symmetrically-arranged arc-shaped coils and a driving part used for driving the two arc-shaped coils to move face to face or back to back. According to the quenching mechanism, the split type induction coil is driven by the driving equipment to move in the axial direction of the diesel engine camshaft main body for quenching work, the diesel engine camshaft main body does not need to be repeatedly clamped, transferred and reset, the quenching treatment work efficiency of the diesel engine camshaft main body is greatly improved, and the production efficiency is improved.

The invention discloses a self-clearance-eliminating cycloidal pin gear speed reducer, and aims to solve the double pain points that in the prior art, an assembly clearance is difficult to control, and the clearance cannot be compensated after abrasion. The speed reducer comprises a machine shell, a main bearing, an output flange, a cycloidal gear, a conical pin and an elastic pressing piece, and is characterized in that the conical pin, cycloidal teeth of the cycloidal gear and a pin groove of the machine shell are all provided with the same taper, the elastic pressing piece is installed on the machine shell and exerts pre-compression force on the pin, and the elastic pressing piece, the conical pin and the pin are made to be tightly attached to eliminate an initial gap; after abrasion, the elastic pressing piece can push the conical pin needle to conduct self-adaptive gap compensation along the conical surface, and the meshing stability is guaranteed through the taper self-locking characteristic. Meanwhile, the structure can be flexibly matched with three transmission modes of'a first-stage planetary gear and a second-stage cycloid ', 'single-stage cycloid cam shaft driving' and'single-stage cycloid cam shaft and a cross slide block ', the effects of reducing machining and assembling cost, maintaining transmission precision for a long time and reducing maintenance loss are achieved, and the structure is suitable for the field of precision transmission.

The utility model discloses a cam shaft bowl-shaped plug feeding device which comprises a rectangular plate, a hole groove is formed in the rectangular plate, supporting plates are fixedly connected to the two ends of one side of the rectangular plate, and the faces, close to each other, of the two supporting plates are each connected with a clamping assembly. A feeding frame fixedly connected with the rectangular plate is arranged on the same side of the two clamping assemblies, a feeding groove is formed in the upper end of the feeding frame, a fixing groove communicating with the feeding groove is formed in the side, close to the supporting plate, of the feeding frame, and hinge movable plate doors are connected to the side walls of the two ends in the fixing groove correspondingly; the feeding groove is filled with a plurality of bowl-shaped plugs, and the side, away from the supporting plate, of the rectangular plate is fixedly connected with a crimping assembly. According to the utility model, self-adaptive clamping of camshafts with different diameters and automatic crimping of bowl-shaped plugs are realized, and the applicability and the production efficiency are improved.

The utility model relates to the technical field of camshaft machining, in particular to a rotating seat for camshaft machining. Comprising a base, a vertical plate is connected to the base, a supporting frame is connected to one side of the vertical plate, a first motor is connected to the supporting frame, a rotating rod penetrating through the vertical plate is arranged at the output end of the first motor, a fixing base is connected to one end of the rotating rod, and a plurality of first telescopic rods are connected to the outer side of the fixing base; a movable shaft of the first telescopic rod penetrates through the side wall of the fixing base and is connected with a first clamping plate, a second motor is connected to the base, a lead screw is arranged at the output end of the second motor, a sliding base is in threaded connection with the lead screw, a bearing piece is arranged above the sliding base, and a connecting base connected with the outer ring of the bearing piece is arranged on the sliding base. The inner ring of the bearing piece is connected with a plurality of second telescopic rods, and movable shafts of the second telescopic rods are connected with second clamping plates. According to the utility model, the stability of the camshaft in the rotary machining process is improved; and meanwhile, the cam shafts with different lengths can be clamped and fixed, and the applicability is high.

The invention belongs to the technical field of technical performance testing equipment of electronic control oil injectors in core high-value accessories of diesel generating sets for petroleum drilling production, and particularly relates to a dual-drive electronic control oil injector performance testing device and method and application. The device comprises a connecting base, a fuel supply and recovery mechanism connected to the lower portion of the connecting base, a fuel injector fixing support connected to the lower portion of the connecting base and arranged beside the fuel supply and recovery mechanism, a cam shaft box mechanism connected to the upper surface of the connecting base, and a lower push rod mechanism connected between the connecting base and the fuel injector fixing support. The direct current control mechanism and the manual driving mechanism are fixed on the upper surface of the connecting base and are connected with the cam shaft box mechanism. The method is complete in function, simple to operate, visual and accurate in detection result, high in goodness of fit, excellent in timeliness and low in cost. Compared with the prior art, the speed is increased by more than or equal to one time, and the effect that the detection result is visual and clear is achieved.

The utility model discloses an oil-gas separation mechanism and an engine, the oil-gas separation mechanism comprises an air inlet cam shaft, a chain wheel, a centrifugal separation disc and a breather pipe, and the air inlet cam shaft is provided with a first channel penetrating through the two ends of the air inlet cam shaft; the chain wheel is meshed with a timing chain of an engine and used for driving the air inlet cam shaft to rotate. The centrifugal separation disc is connected with one end of the air inlet cam shaft and provided with a separation cavity, the separation cavity communicates with the first channel, fan blades are arranged in the separation cavity, the centrifugal separation disc rotates to suck mixed oil gas into the separation cavity, and the fan blades guide gas into the first channel and throw engine oil out of the separation cavity. The breather pipe communicates with the end, away from the centrifugal separation disc, of the first channel and is used for exhausting gas in the first channel. According to the oil-gas separation mechanism, the oil-gas separation structure can be arranged on the air inlet cam shaft, the space occupied by the oil-gas separation structure in an engine is reduced, the internal structure of the engine is simplified, and the manufacturing difficulty and manufacturing cost of the engine are reduced.

The invention provides a control method and device for consistency of all cylinders of an engine and a vehicle. The method comprises the steps that the rotating speed and torque of the engine are obtained, and the rotating speed and torque of the engine are obtained; determining that the engine is in a low-speed and low-load working condition under the condition that the engine rotating speed is in a first preset range and the engine torque is in a second preset range; under the condition that the engine is in the low-speed and low-load working condition, the camshaft phase is controlled to be delayed relative to the crankshaft phase, so that opening of an intake valve of the engine is delayed, and the problem that in the prior art, the actual EGR rate consistency of all cylinders of the engine is poor is solved.

The invention discloses a camshaft sensor stability detection method and system, and relates to the technical field of intelligent sensors, and the method comprises the steps: carrying out the multi-source collection of a camshaft sensor, obtaining a multi-dimensional sensing data set, carrying out the conjoint analysis of the multi-dimensional sensing data set, and extracting a dynamic stability characteristic parameter set; constructing a sensor operation state matrix based on the dynamic stability characteristic parameter set in combination with an environment parameter set, and generating a sensor stability diagnosis result; and matching an optimization strategy library according to the sensor stability diagnosis result, and generating a stability detection report. The technical problems that in the complex operation environment of an engine, a traditional camshaft sensor stability detection means has defects and cannot meet the requirements of accurate evaluation and effective management and control are solved, the stability of the camshaft sensor is accurately detected in the complex operation environment of the engine, accurate data are comprehensively obtained, and the reliability of the camshaft sensor is improved. And the technical effects of accurate evaluation of the stability and effective control of the engine performance are achieved.

A power tool may include a housing including first and second clamshell halves. The power tool may include a motor directly supported by the first and second clamshell halves. The power tool may include a gear assembly directly supported by the first and second clamshell halves and operably coupled to the motor. The power tool may include an impact mechanism disposed within the housing between the first and second clamshell halves and operably coupled to the gear assembly, the impact mechanism including a camshaft, an anvil rotationally supported by an anvil support for rotation about an axis, the anvil support being directly supported by the first and second clamshell halves, and a hammer configured to reciprocate along the camshaft and to impart rotational impacts to the anvil in response to rotation of the camshaft.

The present invention relates to the technical field of machining lathes, and discloses a camshaft machining lathe and a camshaft machining process. Through the arrangement of a positioning component and a driving component, when a portion of a long shaft to be machined is turned into a camshaft, the portion of the long shaft to be cut into the camshaft is divided into several small sections by the positioning component, so that a feed mechanism controls a turning tool to turn these small sections in sequence, and the completed camshaft is turned out, thereby preventing the portion of the long shaft that is turned into the camshaft from being deformed during the machining process, thereby improving the accuracy of the camshaft. When it is necessary to move the positioning component, it is only necessary to release the clamping of the long shaft by the positioning clamp, and then the positioning component can be driven to move on the guide rail by the driving component. When passing through the feed mechanism, it is only necessary to turn the support plate outside the guide rail, and there is no need to remove the positioning component from the guide rail, thereby reducing the workload of workers and improving the production efficiency of the camshaft.

The utility model relates to the technical field of camshaft machining, in particular to a camshaft drilling device which comprises a shell, a machining cavity and a collecting cavity are formed in the shell through a transverse plate, a drilling machine is connected in the machining cavity in a sliding mode through a driving piece, the transverse plate is communicated with the collecting cavity through a grating plate, and the collecting cavity is communicated with the machining cavity through a driving piece. A pair of pneumatic clamping jaws is fixedly installed at the top of the transverse plate, a collecting assembly used for collecting scraps is arranged in the collecting cavity, the collecting box can collect the scraps generated during drilling, the side face of the collecting box is detachably connected with a filter plate through a clamping piece, the filter plate is detachably connected with the collecting box through a clamping piece, and therefore the collecting box can be used for collecting the scraps. The filter plate filters dust in air entering the collecting box, the risk that the dust is inhaled by workers is effectively reduced, the dust accumulated on the surface of the filter plate can be cleaned through the cleaning piece, the blocking condition is prevented, then the situation that the machining quality is affected by waste chips is avoided, and the machining efficiency is improved.

The disclosure relates to a bicycle transmission comprising an axle, such as a wheel axle or a countershaft in a crank transmission, configured to be non-rotatably fixed to a frame of the bicycle; at least one sun gear rotatably mounted about the axle; at least one clutch mechanism for selectively preventing rotation of the at least one sun gear in at least one direction of rotation about the axle; and a camshaft mounted inside the axle to actuate the at least one clutch mechanism.

The invention provides a normalization processing method for a multi-mode crank angle signal of a diesel engine, which comprises the following steps of: receiving an original crank angle signal of the diesel engine, and identifying a signal mode type of the original crank angle signal; according to the identified signal mode type, selecting a corresponding characteristic tooth judgment logic: for a tooth increasing mode, when it is detected that the current tooth gap time is less than or equal to 5 / 8 + / -dynamic correction value of the previous tooth gap time, judging that the next tooth is a characteristic tooth; for the tooth missing mode, when it is detected that the current tooth gap time is larger than or equal to 3 / 2 + / -dynamic correction value of the previous tooth gap time, the next tooth is judged to be the characteristic tooth; generating a TRIG pulse signal based on the characteristic teeth, and complementing the CDMA pulse signal through camshaft phase information at the tooth missing / tooth increasing position; and performing pulse reconstruction on the non-characteristic teeth according to a preset angular domain resolution, and outputting a standardized TRIG pulse signal and a standardized CDMA pulse signal. According to the technical scheme, unified processing and high-precision output of different tooth type signals are achieved through dynamic threshold value judgment, camshaft phase compensation and pulse reconstruction technologies.

The application provides a no-dead-corner camshaft cleaning device, which comprises a rack, a brushing bin arranged on the rack, a plurality of groups of mounting units arranged on the rack and driven to move in a ring direction by a conveying mechanism, a mounting plate arranged on the conveying mechanism, a brush rod detachably connected to the mounting plate through a quick-release assembly, a movable plate arranged on the mounting plate and capable of sliding transversely, a camshaft body rotatably arranged in a supporting frame on the movable plate and sleeved on the brush rod, a driving mechanism arranged on the rack and connected to the movable plate, the driving mechanism converting the sliding of the movable plate when passing through the brushing bin into driving the camshaft body to rotate along its axis and reciprocatingly slide, and the quick-release assembly and the driving mechanism being connected through a linkage assembly to convert the movement of the driving mechanism into driving the brush rod to rotate. The device can avoid the existence of a cleaning dead angle and improve the cleaning effect on the camshaft body.

The utility model discloses a camshaft signal panel angle detection device based on a Hall effect sensor, which comprises the Hall effect sensor, a base and an L-shaped mounting plate, and is characterized in that the Hall effect sensor is mounted on a first strip-shaped hole in the vertical surface of the mounting plate; the Hall effect sensor can be adjusted up and down to ensure that the probe of the Hall effect sensor is as high as the center of the signal panel; and the mounting plate can be mounted on the base in a front-back adjustable manner through the second strip-shaped hole so as to ensure that the distance between the Hall effect sensor and a signal panel of the cam shaft is 1.5-2.5 mm. The cam shaft rotates near the Hall effect sensor probe, the convex teeth on the signal panel periodically change the magnetic field intensity of the Hall effect sensor, and according to the Hall effect principle, a signal panel graph and an output angle value are obtained to complete detection, manual detection is not needed, the accuracy rate is high, and the signal panel graph can be visually displayed.

The utility model discloses a heptagonal tool positioning structure for special alignment, and belongs to the technical field of engine alignment positioning tools. A heptagonal tool positioning structure is arranged on the camshaft body, the heptagonal tool positioning structure comprises a surface A, a surface B and a surface C, the surface A and the surface B are parallel to each other, the surface C is adjacent to the surface A and the surface B, and a two-dimensional code used for tracing the machining process is arranged on the surface C. According to the heptagonal tool positioning structure for special alignment, through the advantages of accurate positioning, reliable assembly, traceable quality, production optimization, product reliability, high adaptability and the like, the product quality, the production efficiency and the market competitiveness are effectively improved, and a powerful guarantee is provided for related production of camshafts.

The invention discloses a quenching device for camshaft machining, and relates to the technical field of camshaft quenching. The device specifically comprises a semicircular cylinder, the bottom of the semicircular cylinder is fixedly connected with a collecting disc, and the bottom of the collecting disc is fixedly connected with a connecting column; the quenching device for camshaft machining further comprises a quenching mechanism used for quenching the camshaft, the quenching mechanism is arranged in the semicircular cylinder, the quenching mechanism comprises a fixing plate, a sliding way is formed in the fixing plate, a sliding plate is slidably connected to the interior of the sliding way, and a quenching assembly is fixedly connected to the exterior of the sliding plate; and the bearing mechanism is used for bearing the quenched camshaft, the bearing mechanism is arranged below the semicircular cylinder, the bearing mechanism comprises a base, a rotating shaft is installed in the base, and a rotating rod is fixedly connected to the top of the rotating shaft.

The utility model discloses a waste paper smashing device for carton processing in the technical field of carton processing, which comprises a workbench, a cutting box and a slitting box, the cutting box is fixedly connected to the left side of the top of the workbench, the slitting box is fixedly connected to the top of the cutting box, the right side wall of the cutting box is fixedly connected with a rotating motor, and the right side wall of the slitting box is fixedly connected with the rotating motor. The output end of the rotating motor penetrates through the cutting box and extends to an inner cavity of the cutting box, the output end of the rotating motor is fixedly connected with a cam shaft, the cam shaft is rotationally connected with the inner cavity of the cutting box, and lifting grooves are formed in the front side wall and the rear side wall of the inner cavity of the cutting box. According to the waste paper smashing device for carton processing, waste paper can be evenly smashed and cut, later packaging and collecting are facilitated, the size of the smashed waste paper after compression can be smaller, the waste paper is not prone to scattering, and later transportation is facilitated.

The utility model relates to the technical field of tenebrio molitor processing, and discloses a tenebrio molitor drying device which comprises a drying bin and a sieve plate and further comprises a supporting frame, a supporting assembly and a drying assembly, the bottom of the sieve plate is slidably connected with a top groove of the supporting frame and used for supporting and fixing the sieve plate, and a vibration assembly is arranged on the side, away from the sieve plate, of the supporting frame. The vibrating assembly comprises a motor, the output shaft end of the motor is fixedly connected with a driving shaft, and the middle of the driving shaft is fixedly connected with a cam shaft in a penetrating mode. Limiting plates are rotationally connected to the two sides of the driving shaft in a penetrating mode, and the problems that when traditional tenebrio molitor drying equipment conducts drying, hot air is mostly directly sprayed to the surfaces of tenebrio molitor bodies for drying, the hot air at the bottoms of the tenebrio molitor bodies is not directly blown, the tenebrio molitor bodies are dried unevenly or insufficiently, and the drying effect is poor are solved.

The application provides a signal disc and gear press-fitting device and press-fitting method, and relates to the technical field of camshafts, and comprises a positioning seat, a first positioning assembly, a second positioning assembly, a coarse positioning device and a fine positioning device.The coarse positioning device is used for coarsely positioning the signal disc on the top surface of the positioning seat, and the fine positioning device is used for angle positioning of a signal groove on the signal disc.The second positioning assembly comprises a positioning shaft and a positioning key.The positioning shaft is fixedly arranged at the center of the top surface of the positioning seat and is used for positioning a gear center hole.The positioning key is fixedly arranged on the positioning shaft and is used for cooperation with the fine positioning device so as to angle position a key groove on the gear center hole and the signal groove on the signal disc.The gear press-fitting mode can avoid press-fitting deformation of the signal disc through signal disc fixation.The first positioning assembly and the second positioning assembly can cooperate with each other to ensure the concentricity of the signal disc and the gear after press fitting, and can also ensure the timing angle precision of the signal disc and the gear after press fitting.

The utility model belongs to the technical field of motorcycle engines, and relates to an air cylinder head structure of a motorcycle engine, which comprises an air cylinder head, a cam shaft is arranged at the top of the air cylinder head, a timing chain wheel is sleeved on the cam shaft, a combustion chamber is arranged below the cam shaft, and a decompression ejector rod for ejecting an exhaust valve open is arranged in the cam shaft in a sliding mode. A centrifugal mechanism for driving the decompression ejector rod to slide is arranged on the timing chain wheel, a first sparking plug and a second sparking plug which are inclined are arranged on the left side and the right side of the combustion chamber respectively, and the included angle between the second sparking plug and the bottom plane of the air cylinder head is smaller than that between the first sparking plug and the bottom plane of the air cylinder head. The air cylinder head is provided with an avoiding groove for avoiding the timing chain wheel and a sleeve base extending in the direction of the avoiding groove, and a sleeve for installing a second spark plug is arranged in the sleeve base. The cylinder head structure of the motorcycle engine is compact in layout, stable in structure and capable of achieving the purpose of further saving energy and reducing consumption.

The invention provides an assembling method of an engine timing system, the engine timing system and a vehicle. The assembling method of the engine timing system comprises the steps that an air inlet side bolt assembled on an air inlet cam shaft and an exhaust side bolt assembled on an exhaust cam shaft are synchronously screwed to a first preset torque a1; the air inlet side bolt is rotated by a first preset angle b1 in the clockwise direction, then the air inlet side bolt and the exhaust side bolt are synchronously rotated by a second preset angle b2 in the clockwise direction, the air inlet side bolt stops rotating, and the exhaust side bolt continues to rotate by the first preset angle b1 in the clockwise direction; a crankshaft side bolt assembled on the crankshaft is tightened to a second preset torque a2; and the crankshaft side bolt is rotated by a third preset angle b3 in the clockwise direction, and the chain between the air inlet cam shaft and the crankshaft is tensioned through the tensioner. According to the invention, the phase precision and stability of the engine timing system can be effectively improved.

The hydraulic oil can be reused without providing a check valve in the oil control valve.SOLUTION: The valve timing adjustment device includes a rotor 20 supported rotatably within a predetermined rotation angle range with respect to a housing 10 rotating together with a crankshaft and transmitting torque from the crankshaft to a cam shaft 70 by rotating together with the housing 10, an advance oil passage 41 supplying and discharging hydraulic pressure to and from an advance hydraulic chamber, a retard oil passage 42 supplying and discharging hydraulic pressure to and from a retard hydraulic chamber, an OCV30 supplying hydraulic pressure to the advance oil passage 41 and the retard oil passage 42 via a supply port 31a, a recycle oil passage 43 provided in the rotor 20 and connecting the advance hydraulic chamber and the retard hydraulic chamber to the supply port 31a, and a check valve 60 provided in the recycle oil passage 43 and communicating the hydraulic pressure side of the advance hydraulic chamber and the retard hydraulic chamber with the supply port 31a.SELECTED DRAWING: Figure 1

The utility model discloses an automobile engine camshaft bushing which comprises a bushing body, a transverse groove is formed in the middle of the inner wall of the bushing body, an arc-shaped groove is formed in the inner wall of the bushing body, a base plate is arranged in the arc-shaped groove, a groove is formed in one side of the base plate, the arc-shaped groove penetrates through the transverse groove to form communication, and the transverse groove is communicated with the arc-shaped groove. A cavity is formed between the arc-shaped groove and the base plate; the arc-shaped groove surrounds the inner wall of the bush body and penetrates through the transverse groove, at the moment, lubricating oil is injected into the transverse groove through the feeding mechanism, the lubricating oil in the transverse groove enters the arc-shaped groove, and the arc-shaped groove surrounds the inner wall of the bush body, so that a driving shaft in the bush body can be well lubricated; and meanwhile, a base plate matched with the arc-shaped groove is placed in the arc-shaped groove, the base plate can adsorb lubricating oil to a certain degree, real-time lubrication of the driving shaft can be kept, and then the lubricating effect is improved.

The invention belongs to the technical field of automobile braking, and discloses steel backing automatic burr removing equipment and a using method thereof.The steel backing automatic burr removing equipment comprises a rack subassembly, a power subassembly, a carrier transverse moving subassembly and a burr removing subassembly, and a bottom frame and a table top are arranged in the rack subassembly; the power assembly is fixedly connected to the table top, a guide shaft and a cam shaft are arranged in the power assembly, a guide shaft support is arranged in the burr raising assembly, and the guide shaft support is provided with a shaft hole and is in sliding fit with the guide shaft; the burr removing part is provided with a first spring, and the burr removing part is driven by the cam shaft and under the action of the first spring and conducts reciprocating motion with the guide shaft as the guide. The invention further discloses a using method of the equipment. According to the invention, under the condition of switching production of different models, a mold and a cutter do not need to be replaced; the automation degree is high and the labor intensity is low; higher burnishing intensity can be realized, and the adhesive force between the steel backing and a friction material is improved.

A power tool includes a manifold, a pump housing coupled to the manifold, and a camshaft that is supported by the pump housing. A drive sprocket is positioned in the manifold and has a first end that is coupled to the distal end of the camshaft. The drive sprocket includes a plurality of pawls. A sprocket bearing is coupled between a second end of the drive sprocket and the manifold, and a valve body having a first drive member and a second drive member. The valve body rotates in a first direction when the plurality of pawls engages the first drive member and rotates in a second direction when the plurality of pawls engages the second drive member.

The electric valve timing control apparatus of the present application controls an electric valve timing apparatus which changes valve timing by changing a relative rotation phase of a camshaft with respect to a crankshaft of an internal combustion engine using a motor coupled to the camshaft, and includes a control section which, when changing the relative rotation phase of the camshaft using the electric valve timing apparatus after a stop process of the internal combustion engine, changes a phase changing method for changing the camshaft from a current phase to a target phase based on a relationship between the current phase and the target phase of the camshaft.

The application discloses an engine phase synchronization method, system, device and medium suitable for multiple camshafts, and relates to the technical field of engine control. The method comprises the following steps: acquiring a crankshaft signal transmitted by a crankshaft sensor, a camshaft signal transmitted by a camshaft sensor and a preconfigured synchronization condition corresponding to the camshaft in real time; detecting a crankshaft missing tooth corresponding to the crankshaft signal and a camshaft characteristic direction corresponding to the camshaft signal based on the synchronization condition; determining the sequence of the crankshaft missing tooth and the camshaft characteristic direction, and determining the number of the crankshaft tooth and the camshaft direction based on the sequence, so as to realize engine phase synchronization. The application is used to solve the problem that the prior art can only realize engine phase synchronization for specific camshafts, and realizes engine phase synchronization for multiple camshaft types.

The invention relates to the field of camshaft machining equipment, in particular to an automatic loading and unloading device for a double-station parallel camshaft positioning tool. Comprising two mounting mechanisms, each mounting mechanism comprises a clamping unit, a positioning tool working unit and a screwing unit, each clamping unit comprises a left ejector pin assembly and a right ejector pin assembly, and each left ejector pin assembly comprises a left ejector pin and a left power part; the right ejector pin assembly comprises a right ejector pin and a right power piece; the positioning tool working unit comprises a tool frame back plate, a hinge pressing plate and a pressing piece, the hinge pressing plate is opposite to the tool frame back plate, and the pressing piece is connected with the hinge pressing plate; the screwing unit comprises a screwing power piece and a screwing piece, and the screwing power piece is used for driving the screwing piece to rotate. According to the automatic loading and unloading device for the double-station parallel camshaft positioning tool, the positioning tool can be automatically mounted on the camshaft, so that the processing efficiency of the camshaft is improved.

A bearing arrangement for a camshaft of an internal combustion engine, the internal combustion engine including a crankcase and a camshaft including a camshaft gear wheel and a side including a shaft end allocated to the camshaft gear wheel, includes: an axial bearing configured for supporting the camshaft on the side of the shaft end, the axial bearing including a plain bearing body, which includes a mounting surface, is crescent-shaped, and is configured for axially supporting the camshaft and for being attached to the crankcase by way of the mounting interface.