37results about How to "Increase guide length" patented technology

An overload protecting electric screw press comprises a body, a platform arranged above the body, a special driving motor vertically disposed and installed at the cross beam of the body, a small driving gear directly mounted on the output shaft of the special driving motor, a friction slipping big flywheel driven by the small driving gear through the joggled transmission, a screw fixed at the flywheel through a pin, a nut driven by the screw, a slide block fixed together with the nut, and an external brake shoe brake installed at the platform for braking the flywheel. The invention has simple structure, a few components, short transmission chain, high mechanical strength, easy manufacturing, convenient maintenance, low cost, simple operation, low loss of components, anti-waving by buffering, good coaxiality, stable running, high beating force and deformation energy, high forming accuracy, strong unbalance loading resistance ability, overload protecting property, safety and reliability, long service life, energy saving and wide application range. The electric screw press can be widely used in forging forming industry.

This invention is a motorized valve that is used to adjust refrigerant quantity of refrigerating system. Guiding element and nut are arranged at upper and lower sides of magnet inside of the holding cavity. The said guiding element has guiding hole. The said nut includes internal screw thread section and lower guiding section. The said lead screw includes intermediate external thread section, upper and lower guiding sections that protrude from upper and lower end faces of magnet. The said external and internal thread sections are cooperated. The said upper guiding section is located in the said guiding hole of guiding element. The said lower guiding section is located in the lower guiding section of the said nut. This invention extends the guiding length of lead screw. It can reduce the swing range of lead screw. This invention decreases magnet vibration and increases the abrasion resistant capability of thread section.

A gas bag module includes a module housing (18), a gas bag (24) having a gas bag wall (26), a discharge opening (20) which can be closed by a closure device (22), and a limiting strap (28), the limiting strap (28) being coupled with the gas bag wall (26) and the closure device (22). The limiting strap (28) is tensioned in case of an unimpeded unfolding of the gas bag (24) such that the closure device (22) closes the discharge opening (20), and the limiting strap (28) is guided along the gas bag wall (26).

An annular plug (12) to be inserted into a cast hole (11) of a work (M) is projected upward from a housing (3). In a peripheral wall (13) of the annular plug (12), through holes (14) extending radially are formed at intervals circumferentially. A ball (15) is inserted into each of the through holes (14). An operating rod (18) is inserted into a cylindrical hole (17) of the annular plug (12). In an outer peripheral surface of an upper end portion of the operating rod (18), accommodating grooves (19) extending vertically are formed at intervals circumferentially corresponding to the balls (15). Guide surfaces (24, 24, 24) are formed between the adjacent accommodating grooves (19, 19). These guide surfaces (24) are fitted into the cylindrical hole (17) so as to be prevented from moving radially and allowed to move axially.

The invention discloses a clearance seal plunger type cylinder and belongs to the technical field of hydraulic cylinders. The clearance seal plunger type cylinder comprises a cylinder barrel, a piston rod and a gland; a guide sleeve is fixed on the inner cylindrical surface of the cylinder barrel; a copper-base anti-abrasion oil-free bushing is mounted between the piston rod and the guide sleeve; an oil passage for communicating the outer side of the cylinder barrel with the high-pressure cavity of the cylinder barrel when the piston rod finishes traveling is opened in the plunger type cylinder, when the piston rod of the plunger type cylinder finishes traveling, the oil passage can output pressure oil and send a pressure signal to realize the logic control for a hydraulic system; a very small clearance is formed between the relatively moving surfaces of the copper-base anti-abrasion oil-free bushing and the piston rod to form clearance seal.

The invention relates to a crystal clamp part for broaching a silicon rod, which is provided with a polygon terrace hole. A crystal is provided with a connecting polygon terrace and a lifting rod, wherein the upper terrace face of the connecting polygon terrace is greater than the lower terrace face; the lifting rod is arranged on the lower end face of the lower terrace face; the clamp is provided with a polygon terrace hole; a connecting polygon terrace for the crystal is sheathed in the polygon terrace hole; torque transmission and axial tension between the crystal and the clamp can be realized through the matched connecting structure of a shaft and the hole of the polygon terrace without grinding nicks on crystal or using a fixing pin for connection. The section area of the lifting rod on the crystal cannot be reduced so that the breaking factor of the crystal in the broaching process is eliminated in structure. The invention not only can solve the breaking problem of the crystal, but also can realize synchronous rotation of the crystal and the crystal clamp.

The invention relates to a parallel gripper comprising a housing (4) and two adjustable gripper base jaws (10, 12) which are guided in the housing (4) in a jaw guiding recess (8) in a displaceable manner. The base jaws (10, 12) can be moved towards or away from one another by means of a wedge hook gearing (20) that can be adjusted by means of a piston (30) that is guided in said housing. The aim of the invention is to provide a compact parallel gripper for transmitting and receiving great gripper forces or overturning moments. According to the invention, the parallel gripper is configured in such a way that the piston (30) is provided with an oval or essentially rectangular form having rounded edges and that the base jaws (10, 12) are provided with at least two guiding webs (16) on both sides respectively. Said webs are rectangular, wedge-shaped or trapezoidal in the cross-section thereof and extend in the direction of displacement (6). The jaw guiding recess (8) is provided with guiding grooves (18) which are configured complementary thereto. The ratio of the wall thickness (E) of the housing (4) measured between the base of the guiding grooves (18) and the outside of the housing in relation to the width (A) of the housing measured vertically in relation to the direction of displacement(6) of the base jaws (10, 12) amounts to at least 0.2. The ratio of the width of inclined traction of the wedge hook gearing (D) (20) in relation to the outside width (B) of the base jaws (10, 12) amounts to at least 0.4.

The invention relates to a lengthening device for a tie bar guide hole of a movable template of a die casting machine. The lengthening device is characterized in that a left guide copper sleeve is mounted in a left end hole of the movable template; the excircle surface of the left guide copper sleeve is in transition fit with the inner hole surface of the movable template; a right guide seat is mounted in a right end hole of the movable template; a right guide copper sleeve is mounted in a hole of the right guide seat; the excircle surface of the right guide seat is in transition fit with the inner hole surface of the movable template; the inner hole surface of the right guide seat is in transition fit with the excircle surface of the right guide copper sleeve; a tie bar is matched with the inner hole surface of the left guide copper sleeve and the inner hole surface of the right guide copper sleeve; a first lubricating oil channel is formed in the movable template; the first lubricating oil channel communicates with an oil storage tank on the left guide copper sleeve; a second lubricating oil channel is formed in the right guide seat; and the second lubricating oil channel communicates with an oil storage tank on the right guide copper sleeve. According to the lengthening device, the guide seat is mounted at one end of the tie bar guide hole of the movable template, the guide length is lengthened, stability and repeated accuracy of locked mold opening are improved, oil is injected into the lubricating oil channels, and the tie bar and the guide copper sleeves are well lubricated.

The invention discloses a design method of a novel punching die structure and aims to overcome the defects that ZP punching dies are poor in guidance, IPT punching dies are difficult to machine and high in material consumption and the like. The design method includes structural and size design of a punching die. The punching die structurally comprises a middle die, an upper punching rod and a lower punching rod and is characterized in that the diameters of the bodies of the upper punching rod and the lower punching rod and the diameter of a punching tail are all phi 22mm or phi 25.25mm, the overall length of the punching rods is 133.35mm, the punching tail is of the structure of the ZP type punching die or the IPTB type punching die, the middle die is the IPTB or IPTD type standard middle die. The novel punching die structure mainly applies to rotary type tablet machines.

The invention relates to a burner fire cover, a burner and a gas stove. A fire cover base is arranged on a furnace end, the fire cover is arranged on the fire cover base, a fire outlet groove is formed in the fire cover, a penetrating through hole is formed in the centers of the fire cover, the fire cover base and the furnace end, a dry-burning-prevention sensor is arranged in the through hole, aninner ring cavity and an outer ring cavity are formed in the fire cover base, the inner ring cavity is annularly arranged around the through hole, a gas outlet of the furnace end communicates with the inner ring cavity, the fire outlet groove communicates with the outer ring cavity, the inner ring cavity and the outer ring cavity communicate through a connection channel, and the longitudinal section of the fire outlet groove is square. The whole structure is simple, dismounting, mounting and cleaning are easy, gas sufficient mixing is facilitated, flames are more uniform, combustion is more sufficient, and the combustion effect is better.

The invention discloses a steel piston for a diesel engine and a production process thereof. The steel piston comprises a piston seat, two semi-annular oil duct baffle plates which are same and a pair of piston skirts which are symmetrically arranged along the axis of the piston seat, wherein a combustion room is arranged at the head of the piston seat, a cooling liquid groove is formed in the back surface of the piston seat, a pair of symmetrically arranged supporting seats is further integrally forged on the back surface of the piston seat and through holes are formed in the supporting seats, the piston skirts compress the oil duct baffle plates above the cooling liquid groove and the two side edges of the piston skirts are connected to the side edges of the supporting seats to form piston guide seats, oil inlets are formed in the oil duct baffle plates and pin holes are formed in the edge positions, and aligning pins matched with the pin holes are arranged on the piston seat. The steel piston disclosed by the invention is simple in structure, the acting force on a weld joint is small in a piston moving process, the guiding precision of the piston can be controlled well, the service life of the piston is prolonged, and the strength and the anti-impact capacity of the piston are improved; the adopted production process is concise and reasonable in process, convenient to produce and suitable for scaled production.

The invention discloses a dual-rotating-wedge speed-adjusting variable-pitch pneumatic valve actuator which comprises a housing as well as a main shaft and a piston which are arranged in the housing, wherein the main shaft is positioned in the middle of the housing; the piston is mounted at the periphery of the main shaft and can axially move up and down in the housing through air source pressure; two outer rotating wedge grooves passing through a central line are formed in the outer wall of the piston; two inner rotating wedge grooves passing through the central line are formed in the inner wall of the piston; the rotating directions of the outer rotating wedge grooves and the inner rotating wedge grooves are opposite; the outer rotating wedge grooves are matched with an outer pin fixed to the housing and an outer pin sleeve to form primary transmission; the piston rotates clockwise or anticlockwise while moving up and down; the inner rotating wedge grooves are matched with an inner pin fixed to the main shaft and an inner pin sleeve to form secondary transmission; the main shaft rotates clockwise or anticlockwise relative to the piston; the output angle of the main shaft is equal to the sum of two-stage transmission angles. According to the pneumatic valve actuator, the utilization rate of the output power of the pneumatic valve actuator can be greatly increased; the buffering operation can be automatically carried out at the starting and ending stages and the buffering speed is adjustable; the pneumatic valve actuator is simple and compact in structure and long in service life, and has few faults.

The invention provides a fixing device of a magnetostrictive liquid level sensor. The magnetostrictive liquid level sensor comprises a measuring rod, wherein the end of the measuring rod is provided with a rigid section and a threaded section, the fixing device comprises a guiding structure and a limiting block, the end of the measuring rod is arranged in the guiding structure and can vertically move under the guiding effect of the guiding structure, the limiting block is arranged in the guiding structure and is provided with a threaded hole, the limiting block is installed at the threaded section in a screwed mode, and the fixing device can be fixed to the bottom of a liquid storage container. The fixing device can keep the bottom of the magnetostrictive liquid level sensor including the measuring rod straight and non-swinging, the application range of the magnetostrictive liquid level sensor can be greatly widened, and the service life of the measuring rod can be prolonged. The invention further provides the magnetostrictive liquid level sensor. The sensor includes the fixing device and is wide in application range and long in service life.

The invention relates to a push button system for activating an actuation member, the system including a button head, a pusher actuator integral with the button head, a first hollow guide member, thepusher actuator being mounted to slide inside the first hollow guide member, the first hollow guide member being intended to be secured to a fixed element relative to the button head and to the pusheractuator, a second hollow guide member arranged in the button head, and a pin mounted to slide inside the second hollow member, and intended to be secured to the fixed element. The pusher actuator has an upper portion provided on the periphery thereof with a collar intended to cooperate with an internal face of the first hollow guide member to guide the pusher inside the member.

The invention discloses a boring bar guide device. The boring bar guide device comprises milling shafts; each milling shaft is provided with a long guide key; and the ends of the milling shafts are provided with two guide end face keys which can increase the guide length. The boring bar guide device has a reasonable structure and greatly increases the guide length so as to ensure the linear movement accuracy of a boring bar.

The invention discloses an efficient grain conveying vehicle convenient for unloading, comprising a main compartment body, a vehicle head and wheels arranged at the bottom of the main compartment body; a discharging port and a fixing baffle are arranged at the lower end of the main compartment body; a brake plate in slide match with the fixing baffle is arranged at the lower end of the discharging port; the brake plate is fixedly connected with one end of a connection rod of which the other end is connected with a handle by a first rotary shaft; the middle of the handle is connected with a fixed support by a second rotary shaft; the fixed support is fixed on the main compartment body; an unloading hopper matched with the discharging port is arranged at the bottom of the man compartment body; an upper fixing button and a lower fixing button are respectively arranged at two sides of the unloading hopper; a telescopic material hopper is arranged in the unloading hopper; limiting chains mutually matched with the upper fixing button and the lower fixing button are respectively arranged at two sides of the lower end of the telescopic material hopper.