152results about "Eccentric-shafts" patented technology

An eccentric axle with adjustable eccentricity for machining the thin-wall sleeve barrel is composed of a core axle body and an eccentricity adjusting block with two central holes at it's both ends and matched with the head and tail centers of machine-tool. Said eccentricity can be adjusted by adjusting the distance between the central axis of said core axle body and the central hole of said eccentricity adjusting block.

The invention aims to provide an engine balance shaft system for solving the problems that a traditional balance shaft system is inconvenient to arrange and prone to deforming and being stuck. The engine balance shaft system disclosed by the invention comprises a balance shaft with a balance shaft chain wheel, wherein the balance shaft is provided with a front balance block and a rear balance block. The engine balance shaft system is characterized in that the balance shaft chain wheel is arranged inside a triangle formed by a fuel pump drive chain wheel, a crankshaft timing chain wheel and a camshaft drive chain wheel; and the balance shaft chain wheel, the fuel pump drive chain wheel, the crankshaft timing chain wheel and the camshaft drive chain wheel are on a same plane and are chained by timing chains. Therefore, the whole structure of the engine balance shaft system is simpler. Simultaneously, the balance shaft is arranged on one side of a crankshaft rather than below the crankshaft, so that the whole height of the engine balance shaft system can be reduced, and the engine balance shaft system is easier to arrange.

The manufacturing method of crank shaft comprises a pipe making process; a drawing process; a cutting process; a forging process; and a processing process. The manufacturing method of crank shaft also could only comprise a pipe making process; a cutting process; a forging process; and a processing process. The manufacturing method of motor shaft comprises a pipe making process; a drawing process; a cutting process; and a processing process of forming a key groove on the motor shaft finally completed through the cutting process.

An eccentric shaft for a compacting machine is rotatable about a rotational axis and includes a fixed and movable eccentric mass where the movable eccentric mass cooperates with the fixed eccentric mass in one of the directions of rotation of the eccentric shaft to partly balance the fixed eccentric mass in the other rotation direction of the eccentric shaft. At least one section of the fixed eccentric mass shows a maximal radial extension (UB) in relation to the rotational axis, limited by an arc-shaped curve, which extends to a circle shape, with the diameter (D) showing a distance (A), between the point (P) on the circle-shaped curve that is located closest to the point of intersection of the rotational axis and the section plane, and the point of intersection, from 0 up to 0.1(D).

The invention comprises an input shaft structure, which has a cylindrical shaft member with two 180 deg arranged key slots and four eccentric members. The eccentric members are mounted on the cylindrical shaft via the connecting keys on them in the following order: the eccentric centre line; the eccentric centre lines of the other two eccentric members are separately close to left and right end faces of the mounted two eccentric members and are mounted in a 180 deg reverse direction on the back side of the cylindrical shaft centre line.

The invention relates to the machining field and in particular relates to a machining method of the high-precision eccentric spline shaft. The machining method comprises the following steps: making position lines for central holes and eccentric holes in two ends of the shaft; forming the central holes in the two ends through machining according to the positioning lines; machining the shaft roughly and leaving a proper amount of machining allowance; detecting flaws and conducting tempering; conducting semi-finish machining for the maximal shaft diameter; boring two ends until length sizes required in a drawing are met; selecting the central lines and making new position lines of new central holes and eccentric holes and punching sample holes ; forming central holes and eccentric holes in the two ends by using a numerical control or digital display boring machine through machining; machining shaft shoulders; and mounting the shaft on a large gear hobbing machine and machining the shaft in a single-tool cutting mode. According to the invention, requirements for deflection angles in a method utilizing a tooth-shaped central line and an eccentric distance of a spline shaft are guaranteed. At the same time, a problem that a spline groove is difficult to align to a cutter is solved and the work piece concentricity and verticality are guaranteed in single-process clamping and machining. Influence on the manufacturing of the spline shaft caused by eccentric weight is also avoided completely and tempering reliability and operability are guaranteed.

The invention provides an eccentric oscillating type speed reducer and a method for manufacturing an eccentric shaft thereof which may greatly prolong the service life of the eccentric shaft of the eccentric oscillating type speed reducer so as to further improve the durability of the speed reducer. In the eccentric oscillating type speed reducer (12) in which outer gears (24A, 24B) are internally engaged with an inner gear (28) while biasing or crookedly oscillating through the eccentric shaft (20), before applying a thermal load causing a change in the material characteristics of the eccentric shaft (20) to the eccentric shaft (20), a projection resulting from an indentation protrusion test has a height (A1); and after applying the thermal load to the eccentric shaft (20), a projection resulting from the indentation protrusion test has a height (A2); and hardening treatment having such a characteristic that the ratio of A2 to A1 is less than 1.0 is performed on the eccentric shaft.

The invention discloses a three-cylindrical rolling rotor type compressor. The three-cylindrical rolling rotor type compressor comprises a liquid storage device, a sealed container, an electromotor, and an air cylinder component; a stator of the electromotor is fixed in the sealed container; a rotor of the electromotor is connected to an eccentric shaft for driving the air cylinder component comprising three air cylinder units; angles of slide sheets of two adjacent air cylinders are staggered with 120 degrees, and a slide sheet of a third air cylinder and each of the slide sheets of the other two air cylinders are staggered with 60 degrees; two adjacent eccentric shafts on an integrated processed crankshaft has the complete same eccentric directions, and a third eccentric shaft and each of the other two eccentric shafts are staggered with 180 degrees; the centric shaft which is staggered with 180 degrees individually is provided with a torque balance mechanism; two air cylinders the slide sheets of which are staggered with 120 degrees and the two eccentric shafts with the completely same eccentric directions are installed at the same side; the eccentric shaft which is staggered with 180 degrees and the third air cylinder are assembled at the other side. By adopting the three-cylindrical roller rotor compressor provided by the invention, the displacement and the power of the rolling rotor type compressor are increased, the vibration of load torque is reduced, and the vibration and the noise are reduced.

The invention provides an eccentric fixture comprising a fixture body and a clamping ring. The fixture body is cylindrical in shape, and the left end thereof is provided with a center hole and a steel ball; the left end face of the fixture body is provided with a groove in the shape of Chinese character jing; the groove in the shape of Chinese character jing divides the left end face of the fixture body into a central block and four eccentricity adjusting top blocks, wherein the central block is located at the center of the left end face of the fixture body and the four eccentricity adjusting top blocks are provided with screw holes in the radial direction of the fixture body; eccentricity adjusting screws are screwed into the screw holes; a circular arc groove facing the eccentric blocks is arranged at the bottom of the groove in the shape of Chinese character jing; the right end face of the fixture body is provided with a journal bush in the shape of a round tube; the inner circle hole of the journal bush is coaxial with the fixture body; the journal bush is provided with a clamping groove; the clamping ring is arranged on the outer circle wall of the journal bush in a sleeving manner. The eccentric fixture has the advantages of simple structure, convenient manufacture and use, small error in eccentric distance of parts, great uniformity, high precision and high production efficiency, and is suitable for machining parts with small eccentric distances.

The invention discloses an eccentric shaft and a manufacturing method thereof. The eccentric shaft is made from non-quenched and tempered steel with ferrite-pearlite structure, in particular 38MnVS6 non-quenched and tempered steel. The manufacturing method thereof includes: heating, the heating temperature ranges from 1150 to 1200 DEG C; forging, one-time forging is used in a forging process, both ends of the eccentric shaft are forged at the multi-step low final forging temperature, and the final forging temperature is controlled to range from 800 to 850 DEG C; and cooling, a forged workpiece is suspended to be air-cooled. The non-quenched steel eccentric shaft manufactured by the invention dispenses with the quenching and heating processing working procedure, thereby generating obvious positive effects, namely that the production period is shortened, the phenomena of product deformation and cracking are reduced, the rate of finished products is increased, and energy consumption and environmental pollution are reduced. Compared with the process, the eccentric shaft manufactured by the non-quenched and tempered steel can save 39 percent of electrical energyaccording to the calculation.

The invention discloses an eccentric shaft assembly for a recreational vehicle (RV) reducer. The eccentric shaft assembly is easy to machine and convenient to replace and comprises a main shaft. An outer spline is arranged on the periphery of the main shaft which is connected with a first eccentric wheel and a second eccentric wheel through splines. An eccentric wheel gasket is arranged between the first eccentric wheel and the second eccentric wheel. One end face of the eccentric wheel gasket abuts against the first eccentric wheel. The other end face of the eccentric wheel gasket abuts against the second eccentric wheel. The main shaft is further provided with a first annular groove and a second annular groove. A first clamp spring is arranged in the first annular groove and abuts against the end face of the first eccentric wheel. A second clamp spring is arranged in the second annular groove and abuts against the end face of the second eccentric wheel. The main shaft is sleeved with a first bearing and a second bearing. One end face of the first bearing abuts against the first clamp spring, and one end face of the second bearing abuts against the second clamp spring.

The invention relates to the field of machining, in particular to an eccentric shaft machining method. The eccentric shaft machining method comprises the following steps of conducting feeding, wherein a proper blank material is selected, and certain working allowance is reserved; conducing coarse machining, wherein the left end of a workpiece is clamped, the right end face and the outer circle of the workpiece are turned, 0.5 mm machining allowance is reserved, a center hole is drilled through a standard center drill, the right end of the workpiece is clamped through reversing, the left end face of the workpiece is turned, the overall length of the left end face of the workpiece is measured, and a center hole of the left end face is drilled; conducting semi-finish machining, wherein an eccentric sleeve is clamped to the outer circle of the workpiece. The eccentric sleeve is used as a locating element, the outer circles of all sections of an eccentric shaft are machined, the axial distances of the outer circles of the sections of the eccentric shaft are easy to guarantee, and accurate and reliable locating reference is provided for machining of the center holes. During grinding, the part is installed in the mode that one center hole is used for clamping and the other center hole is used for ejecting, the machining precision of the part can be conveniently guaranteed, a turning clamp which is complexly designed is omitted, the production cycle is shortened, and the productivity is increased.

The invention discloses a high-precision standard eccentric shaft with an adjustable eccentric distance. The eccentric shaft comprises a main shaft; one side of the main shaft is provided with an external thread section, and the other side of the main shaft is provided with a shaft shoulder; the external thread section is sleeved with a gasket and a locknut which can be screwed on the external thread section; two inclined planes are located between the external thread section and the shaft shoulder, form an angle of 60 DEG and are a same distance away from a central axis and symmetrical with a shaft body; a shaft sleeve, an isolation sleeve and another shaft sleeve are successively sleeved between the shaft shoulder and the gasket; the spindle sleeves are in the shape of rings, two planes forming a 60-DEG angle are arranged in the rings, the two planes respectively match with the two inclined planes of the main shaft, and a pair of replaceable standard-thickness blocks with same height are respectively arranged in a corresponding plane and a corresponding inclined plane. According to the invention, accurate adjusting of the eccentric distance can be realized; through changing of the standard-thickness blocks, a desired standard eccentric distance can be obtained, and influence of manual adjusting can be eliminated; and on a same standard eccentric shaft, rapid measurement and calibration can be realized, and the standard eccentric shaft has a simple and reliable structure.

The invention discloses a weight type self-balancing eccentric shaft. A balance weight is fillet-welded on the opposite side, close to an eccentric center line, of a connecting guard in an eccentric shaft in the prior art, so that the center of mass of the connecting guard shifts toward the opposite side, relative to a rotary center line, of eccentric bearing guards and the eccentric inertia moment generated by the connecting guard is equal to the eccentric inertia moments generated by the eccentric bearing guards but the directions are opposite, thus achieving self-balancing of the eccentric inertia spin moment of the eccentric shaft. The eccentric inertia spin moment of the eccentric shaft in the prior art is self-balanced by the interior of the eccentric shaft instead of original external flywheels, thus eccentric balance weights on the external flywheels can be omitted. The weight type self-balancing eccentric shaft has high balance precision and a simplified structure, is easy to detect and control, reduces the manufacturing cost of equipment and saves the operating cost.

In a balance shaft for a multi-cylinder in-line engine with at least two imbalance weight sections and at least one bearing structure wherein the balance shaft has imbalance weight sections being arranged symmetrically relative to the bearing position and at least one of the imbalance weight sections is connected to a further shaft section at an end facing away from the bearing position, a flexible coupling element that enables a deflection of the end of the connected imbalance weight section in the direction of the resulting centrifugal forces when the balance shaft rotates is provided between the end of the at least one imbalance weight section facing away from the bearing position and the further shaft section.

A generator (100) and/or machine (110) generating mechanical energy and functioning on the principle of exploitation of an energy allowing the existence of centrifugal forces (Fc) on masses (M) being displaced in rotation along an eccentric trajectory (150) within a system (130, 132, 166, 170, 190, 210) driving a progressive or sudden variation of their radius of rotation, principle of a generator of centrifugal forces from an eccentric with variable radius (100).

The invention discloses a combined piston type electronic vacuum pump for an automobile. The combined piston type electronic vacuum pump comprises a valve body, an electric motor assembly, a noise reduction and exhaust assembly, an eccentric shaft assembly, two piston assemblies and two air inlet one-way valves. The valve body is provided with a center inner cavity, a motor mounting hole is formed in the upper end face of the valve body, the valve body is provided with a left ladder hole and a right ladder hole, and the left ladder hole, the right ladder hole and the motor mounting hole are all communicated with the center inner cavity; a combined type dynamic balance transmission eccentric shaft assembly is mounted in the center inner cavity, the center inner cavity is connected with the noise reduction and exhaust assembly for carrying out covering and sealing, and the electric motor assembly is mounted in the motor mounting hole; and the end face of the left ladder hole and the end face of the right ladder hole are connected with end covers for sealing, the piston assemblies and the air inlet one-way valves are arranged in the left ladder hole and the right ladder hole, and the electric motor assembly is mounted on the left ladder hole and the right ladder hole, and is connected with the eccentric shaft assembly to drive the assembly to rotate. A new transmission balance mechanism, a piston structure and the like are adopted in the vacuum pump, the assembly cost and the machining cost are reduced, the assembly safety is improved, sealing of the pump is obviously improved, the noise of the pump is obviously lowered, the service life of the pump is obviously prolonged, and various requirements of automobile use can be met.

The invention provides a rotary shaft, a compressor and an air conditioner. The rotary shaft comprises a rotary shaft body, an eccentric part connected with the rotary shaft body and a buffering part arranged on a thrust surface of the eccentric part to reduce abrasion of the thrust surface. The buffering part arranged on the thrust surface of the eccentric part achieves a movable buffering effect in the axial direction, the rotary shaft can be effectively prevented from moving in the axial direction, thrust sound is eliminated, the problem that the thrust surface has friction with other components of an air cylinder, consequently the thrust surface has abrasion, and the reliability of the rotary shaft is lowered is effectively avoided, and therefore the stability and reliability of the rotary shaft are effectively improved.