32results about How to "Large axial thrust" patented technology

The invention provides a cone plate type stepless speed changer. A driving cone plate and a driven cone plate respectively consist of a pair of movable cone plates and pressurizing cone plates, a pressurizing mechanism consists of an end surface cam pressurizing mechanism arranged at the back side of at least one pressurizing cone plate in a driving shaft pressurizing cone plate and a driven shaft pressurizing cone plate, a speed regulating mechanism consists of a speed reducing shaft, a hollow screw rod and a screw nut, the hollow screw rod and the screw nut are respectively arranged at the back side of a driving shaft movable cone plate and a driven shaft movable cone plate, the hollow screw rod and the screw nut are of ball screw structures or sliding spiral structures, through a speed regulating shaft and a constant ratio transmission mechanism, the conversion relationship of the rotation of the speed regulating shaft to the axial movement of the driving shaft movable cone plate and the driven shaft movable cone plate meets a formula that i1=i2, and the driving shaft movable cone plate and the driven shaft movable cone plate are enabled to do synchronous identical-speed and identical-direction movement. The end surface cam pressurizing mechanism and the speed regulating mechanism of the speed changer are separated in space, the axial dimension of the pressurizing mechanism can be reduced, the positive and reverse two-way pressurization can be realized through the end surface cam pressurizing mechanism, the pressurizing pressure can be regulated in real time along with the transmission torque, the transmission efficiency is high, the service life of a system is long, and the reliability is high.

Switchable mechanical coolant pump (10) comprising a pulley wheel (12) co-rotating with and supported by a rotatable rotor shaft (16), the pulley wheel (12) being directly drivable by a combustion engine, a pump wheel (18) rotatably supported at the rotor shaft (16), an electrically switched wedge-coupled wet friction clutch (40) with a clutch support (26) being fixed to the rotor shaft (16), a clutch ring (30) at the proximal side of the pump wheel (18), and a separate clutch disk (20) rotatably and shiftably supported by the rotor shaft (16), the clutch disk (20) comprising a ferromagnetic element (21) and being arranged axially between the clutch support (26) and the clutch ring (30), a static electromagnet (24) axially pulling the clutch disk (20) to the clutch support (26) into a disengaged position when energized, and a wedge coupling mechanism (22) defined at the proximal side of the clutch disk (20) and the distal side of the clutch support (26), the wedge coupling mechanism (22) comprising: a wedge element (36), and a counter-wedge element (38).

The invention discloses a mechanical transmission closed test bed and a test method thereof. The test bed comprises a motor, connection gear boxes, a torque and rotation speed sensor, a tested transmission, an accompanying transmission and a loader, wherein the loader comprises a spiral spline shaft, a loaded gear, a plane bearing, a pair of wedge cushion blocks, a sliding bearing, a thrust bar and an oil cylinder; the motor is connected with the left connection gear box for providing rotation power for the overall closed test bed; the two transmissions are connected in a back-to-back mode, the tested transmission is connected with the left connection gear box via the torque and rotation speed sensor and the accompanying transmission is directly connected with the right connection gear box; and the loader is arranged onto the right connection gear box for providing different loads for the overall closed test bed. A transmission fatigue life test and a reliability test can be carried out, the closed structure is adopted, the cost is low, energy is saved, the structure is compact, the use is convenient, and the test bed can be applied to transmissions of various models.

The invention belongs to the field of tubular bus welding process attachment devices, and particularly relates to a universal adjustable tubular bus welding bracket. The universal adjustable tubular bus welding bracket comprises an axial supporting base. A plurality of axial guide wheels are distributed on the axial supporting base. Tubular buses are erected on the axial guide wheels, and the outer rims of all the axial guide wheels are matched to form a supporting part. The universal adjustable tubular bus welding bracket further comprises a lifting mechanism. A rotation supporting base is arranged on the lifting mechanism. The roll surfaces of a plurality of circumferential wheels on the rotation supporting base form a contact face. The minimum height of the contact face is lower than the supporting height of the tubular buses on the supporting part of the axial supporting base after the lifting mechanism falls. The maximum height of the contact face is higher than the supporting height of the tubular buses on the supporting part of the axial supporting base after the lifting mechanism rises. The universal adjustable tubular bus welding bracket achieves the online rotation and frontward-backward axial movement capacity in the tubular bus welding process, and therefore the aim of the one-time online welding is achieved under the condition that no mechanical hoisting is needed, the welding speed can be obviously increased, and the welding quality can be obviously improved.

The invention relates to a rapid overturning and tightly-abutting mechanism. An installation groove is formed in the top of the installation seat. An overturning block is hinged to the installation seat through small hinge shafts installed on side plates on the two edges of the installation groove. The small hinge shafts are installed on the side plates on the two edges of the installation groove. The overturning block can freely rotate with the small hinge shafts as the rotation center. When the overturning block is overturned to a limiting position, the overturning block abuts against the bottom of the installation groove. The overturning block is provided with a pin hole. A tightly-abutting shaft is assembled in the pin hole and can axially and freely move in the pin hole. A screwing-down handle is connected to threads at the left end of the pin hole in a threaded manner. The right end of the screwing-down handle is connected with the tightly-abutting shaft. The right end of the tightly-abutting shaft is used for tightly abutting against a workpiece and locating the workpiece. An overturning frame is hinged to the installation seat through hinge shafts. The hinge shafts are installed on the installation seat. The overturning frame can freely rotate with the hinge shafts as the rotation center. When overturning to the limiting position upwards, the overturning frame presses the overturning frame without exerting force. The rapid overturning and tightly-abutting mechanism is convenient to operate and capable of reliably and tightly abutting against the workpiece, rapidly leaving a workpiece machining area, expanding the machining range and shortening the operation time.

The invention discloses a driving device for a triaxial inertially stabilized platform. The device is suitable for driving the swing of a roll frame and an elevation frame of the triaxial inertially stabilized platform. Different from a traditional sector gear transmission or a cog belt transmission, the device adopts a link mechanism to realize the swing of the roll frame and the elevation frame. The driving device is composed of a fixed end hinge pair, a motor-lead screw movable pair and a swing end hinge pair. When the motor bi-directionally rotates to drive the lead screw to axially move forwards and backwards, a swing hinge shaft mounted on a swing frame drives the swing frame to rotate around the center of rotation to swing back and forth. Compared with the traditional sector gear transmission or the cog belt transmission, the structure has the advantages of large transmission ratio, good transmission rigidity, light and small driving unit, simple structure and the like. The device disclosed by the invention is suitable for driving the roll frame and the elevation frame of inertially stabilized and photoelectric servo platforms for aerial remote sensing, target tracking and the like.

A permanent magnet thrust bearing for self adaptation runner weight, comprises a stator, a runner, an auxiliary radial bearing with air gap between the stator and the runner. The stator is made of n pairs of alternating magnetizing permanent magnet ring stacked and the non magnet conductive ring clipped between adjacent permanent magnet rings. The runner is made of m pairs of alternating magnetizing permanent magnet ring stacked and the non magnet conductive ring clamped between adjacent permanent magnet rings. Among them, n and m are all natural numbers. The permanent magnet thrust shaft uses the stator and the runner's permanent magnet ring to bear the weight of the runner along the axis, assisting the radial bearing to distribute the radial force, in order to realize the balance on each freedom degree, with big axle thrust force, simple structure, convenient loading, self adaptation runner weight, difficult to lose magnet, and free from lubricant and cooling. It is especially fit for the occasion that requires for large scale thrust bearings.

The invention relates to a variable transmission ratio limited-slip differential with self-locking function. Including the differential case (1), the variable transmission ratio planetary gear (2) and the side gear (3) arranged in it, and the cam between the rear end surface of the side gear (4) and the rear end surface of the differential case (6) ring (5), locking ring (7), return spring (8) and spring cover (9), the side gear (3) is provided with a friction plate (10), and a central square (11) is arranged in the middle of the differential ) and cross shaft (12), they form a self-locking mechanism. The invention provides a limited-slip differential that realizes self-locking under extreme road conditions and quickly and automatically unlocks when leaving extreme road conditions, thereby improving the passability and safety of the vehicle. The invention is especially suitable for all kinds of wheeled engineering machinery such as off-road vehicles, dump trucks, wheel loaders, bulldozers and the like.

A high-speed direct connection spindle. The high-speed direct connection spindle comprises: a machine body (10); a spindle core (20), the spindle core (20) being pivotally connected in the machine body (10) through an upper bearing (23) and a lower bearing (24) respectively arranged at the upper end and the lower end of the machine body (10), and a conical hole (22) being provided in the bottom end of the spindle core (20), the diameter of the conical hole (22) being gradually increased from bottom to top; a pull rod (30), the lower end of the pull rod (30) being connected to a pull claw (32) that matches the conical hole (22) and is used for fixing a cutter, and the upper end of the pull rod (30) having a cutter hitting disk (31) fixed thereto; a reset spring (21), mounted between the spindle core (20) and the pull rod (30); and an oil cylinder assembly (40), comprising a cylinder body (41) positioned above the top end of the machine body and a piston (42) mounted inside the cylinder body and used for pushing against the cutter hitting disk (31) downwards. The cylinder body (41) is movably provided with a plurality of connecting pieces penetrating therethrough, the part, penetrating through the lower end of the cylinder body (41), of each connecting piece is fixedly connected to the machine body (10), and each connecting piece has an elastic element sleeved thereon. The cylinder body (41) of the oil cylinder is mounted on the machine body (10) in a floating manner, and the axial thrust applied by the oil cylinder to the spindle core (20) when the cutter is assembled or disassembled can be counteracted, so that the bearings are protected from being damaged, and the service life of the bearings is prolonged.