45results about How to "Play the role of axial limit" patented technology

The invention relates to a bearing which has a simple structure and small resistance and is suitable for axial and radial load. The bearing comprises inner rings, auxiliary inner rings closely sleeved on the inner rings, pin rollers distributed on the auxiliary inner rings, rollers arranged between each pair of adjacent pin rollers, annular bridge hoops which are sleeved rollers, auxiliary outer rings closely sleeved on the bridge hoops, and outer rings closely sleeved on the auxiliary outer rings, wherein the pin rollers are distributed in an axial direction; an annular groove with an arc shaped section is formed on each pin roller, and each roller is positioned between the annular grooves of adjacent pin rollers; the inner rings of the bridge hoops are provided with arc shaped grooves which are in movable fit with the rollers; a pair of auxiliary inner rings are symmetrically distributed on the periphery of the inner rings in the axial direction, flangings which extend outwards in a radial direction are formed on the rims of outer edges of the auxiliary inner rings, and outer end faces of the pin rollers are positioned on the inner sides of the flangings; and a pair of the auxiliary outer rings are symmetrically distributed on the inner circumference of the outer rings in the axial direction, and the inner rings of the auxiliary outer rings form a large annular groove for fixing the bridge hoops.

The invention discloses a grinding machine special for the conical surface of a valve. The grinding machine comprises a rack, a grinding head base, a lower dragging plate, an upper dragging plate, a grinding head, a main shaft device and an automatic loading device. The grinding head base is connected with the rack in a rotating mode. An included angle alpha between the axis of a grinding head abrasion wheel and the central line of a main shaft ranges from 25 degrees to 65 degrees. The portion, arranged at the tail end of a spring clamping head in the hollow main shaft, in the main shaft device is connected with a pulling pipe. Locating rods are arranged in the spring clamping head and the pulling pipe. The portion, below a feeding guide rail, in the automatic loading device is provided with a receiving support plate connected with a receiving air cylinder. A clamping jaw is arranged below the feeding guide rail and connected to a longitudinal sliding block. The longitudinal sliding block is supported on a transverse sliding table connected to a feeding bottom plate through a transverse air cylinder. The feeding bottom plate is connected to the rack. The grinding machine special for the conical surface of the valve can meet the requirement for grinding conical surfaces of valves of various specifications, and is high in clamping and locating precision; moreover, automation of the loading process can be achieved, the machining precision is ensured, and the work efficiency is improved.

The present invention discloses an anti-disassembly gas meter connector. The anti-disassembly gas meter connector comprises a connecting tube (1), a nut inner lining (18), an anti-disassembly outer sleeve (5), anti-disassembly caps (2) prepared by non-magnetic materials, anti-disassembly magnets (19), and limiting magnets (8); the limiting magnets (8) are slidably connected in the top end of the anti-disassembly outer sleeve (5); each anti-disassembly magnet (19) is embedded in the corresponding anti-disassembly cap (2) and positioned over the corresponding limiting magnet (8); the anti-disassembly caps (2) are threaded to the anti-disassembly outer sleeve (5); and the top of the nut inner lining (18) is provided with limiting holes (10) which are used for accommodating the limiting magnets (8) and connected with the limiting magnets (8) when the limiting magnets (8) downwardly slide to the lowest position. By adoption of the structure, the connector has an anti-disassembly function, the connector can also be reused on the premise that the anti-disassembly outer sleeve is not destroyed, and use cost is largely reduced.

The invention discloses a tool positioning-clamping mechanism for a milling machine, which comprises a tool (1), a tool shank (3) and a pull bar (4). The tool shank (3) is partially contained in a machine spindle (5) and fixed to the same, the tool shank (3) is provided with a center hole (3.1), the tool (1) is nested into the center hole (3.1), the pull bar (4) is contained in the center hole (3.1), one end of the pull bar (4) is connected with the tool shank (3) and axially limited, the other end of the pull bar (4) is fixedly connected with the tool (1), and accordingly the tool (1) is fixedly connected with the machine spindle (5). The connection way is higher in connection rigidity than the original Morse taper connection way, connection is more stable, and clamping is better. When the machine spindle is in high-speed rotation, the tool is more stable in rotation and less apt to fall from the spindle, and safety factor is higher.

The invention relates to a knob structure of an automobile interior decoration with a crush function. It includes a PCB board, a hollow encoder, a knob, a key bracket, a key cap and a decorative ring, wherein the knob is set outside the hollow rotating shaft of the hollow encoder, and three elastic arms are designed on the lower part of the knob to make it fit in the middle Match the three guide grooves on the control encoder. The end surface of the elastic arm of the knob pushes against the limiting surface at the bottom of the middle guide groove, and plays an axial limiting role on the knob. In addition, the inner side of the bottom of the elastic arm of the knob is chamfered, so that when the knob is subjected to a certain limit of axial force, the three elastic arms are easy to stretch outwards to realize the collapse of the knob. When the axial force on the knob exceeds a certain limit, the three elastic arms of the knob will expand outward, and the entire knob will slide down along the guide groove of the hollow encoder / potentiometer to realize the collapse of the knob, which can meet the collapse amount of about 3mm and achieve protection. occupant safety purposes.

The invention discloses an automatic closed forging forming die, and belongs to the technical field of metal press machining. The die comprises a rigid die base, a floating female die, and automatic die locking devices symmetrically arranged on the two sides of a lower female die base. The two sides of the upper end face of an upper female die base are symmetrically provided with clamping grooves. Each automatic die locking device comprises a swinging lock rod and a power mechanism driving the swinging lock rod to swing. Lock heads clamped to the clamping grooves in a matched mode are arranged on the tops of the swinging lock rods. During combination of an upper female die and a lower female die, the power mechanisms drive the swinging lock rods to swing in the direction close to the upper female die till the lock heads make contact with the clamping grooves to be clamped; During opening of the upper female die and the lower female die, the power mechanisms drive the swinging lock rods to swing in the direction away from the upper female die till the lock heads get away from the clamping grooves to be reset. The die clamping pressure can be increased, and automatic control over locking and unlocking of the upper and lower female dies of a die locking device is achieved.

The invention discloses an electronic expansion valve, belonging to the technical field of expansion valves, comprising a valve seat and a casing arranged on a valve body, the casing is fixed on the valve seat, and a first channel and a second channel are arranged on the valve body. The valve seat is provided with a flow channel and a valve port between the first channel and the second channel, and a valve needle and a rotor assembly for driving the valve needle to move back and forth are arranged in the casing, and a valve seat is provided with a matching valve needle. When the valve needle moves back and forth along the guide hole, it opens or closes the valve port. One side of the valve seat is provided with an upper valve chamber connected to the inside of the casing, and the other side is provided with a lower valve chamber connected with the second channel. , There is a communicating balance hole between the upper valve cavity and the lower valve cavity. The electronic expansion valve provided by the present invention is provided with a balance hole communicating with the upper valve cavity and the lower valve cavity. Through the function of the balance hole, the pressure in the upper valve cavity is consistent with the pressure in the lower valve cavity, and the pressure difference formed by the upper valve cavity and the first channel on the valve needle is the same as the pressure formed by the first channel and the lower valve cavity on the valve needle. The differential forces cancel each other out.

The invention relates to a bearing which has a simple structure and small resistance and is suitable for axial and radial load. The bearing comprises inner rings, auxiliary inner rings closely sleeved on the inner rings, pin rollers distributed on the auxiliary inner rings, rollers arranged between each pair of adjacent pin rollers, annular bridge hoops which are sleeved rollers, auxiliary outer rings closely sleeved on the bridge hoops, and outer rings closely sleeved on the auxiliary outer rings, wherein the pin rollers are distributed in an axial direction; an annular groove with an arc shaped section is formed on each pin roller, and each roller is positioned between the annular grooves of adjacent pin rollers; the inner rings of the bridge hoops are provided with arc shaped grooves which are in movable fit with the rollers; a pair of auxiliary inner rings are symmetrically distributed on the periphery of the inner rings in the axial direction, flangings which extend outwards in a radial direction are formed on the rims of outer edges of the auxiliary inner rings, and outer end faces of the pin rollers are positioned on the inner sides of the flangings; and a pair of the auxiliary outer rings are symmetrically distributed on the inner circumference of the outer rings in the axial direction, and the inner rings of the auxiliary outer rings form a large annular groove for fixing the bridge hoops.