8results about How to "Increase fit clearance" patented technology

The utility model discloses a mold core-pulling structure, which relates to the technical field of molds, and comprises a bottom plate and a core-pulling mechanism arranged on the bottom plate, the core-pulling mechanism comprises a first sliding block group and a second sliding block group which are arranged on the bottom plate, one side of the first sliding block group is respectively and fixedly provided with a middle cylinder and two groups of inclined plates, and the other side of the first sliding block group is fixedly provided with a second sliding block group. A sliding plate is arranged at one end of the inclined plate in a sliding mode, and two sets of fixing plates are fixedly arranged on one side of the second sliding block set. According to the core-pulling mechanism, a plurality of parts in a traditional core-pulling structure are integrated on the bottom plate through a layered linkage structure of the first sliding block group and the second sliding block group, so that the structure is compact, the space is saved, the utilization rate of the internal space of the mold is remarkably improved, and the design requirements of miniaturized and precise molds are met; and integral demolding is achieved, and it is ensured that parts are free of residues and damage.

The invention discloses a pin wheel housing and an RV speed reducer, and relates to the technical field of speed reducers, the pin wheel housing comprises a base body and a groove, a plurality of tooth grooves are evenly distributed in the peripheral wall of an inner hole of the base body, and the tooth grooves are used for being matched with tooth pins so as to play a role in positioning and guiding, and it is guaranteed that the tooth pins are located at correct positions and motion trails. A connecting part is formed between every two adjacent tooth grooves, a groove is formed in each connecting part, and a first edge part and a second edge part are formed between each groove and the corresponding two adjacent tooth grooves respectively. And the first edge part and the second edge part can enable the connecting part to have certain strength, so that the edge of the groove is prevented from being damaged and cracked, and the reliability of the pin wheel housing is improved. By arranging the groove, the fit clearance between the cycloidal gear and the connecting part can be increased, and the shear stress can be reduced when the fit clearance is increased, so that the power loss caused by grease stirring is reduced, and the transmission efficiency is improved.

This application relates to a feeding control method, device, and components for a shot blasting machine, comprising the following steps: S1, determining the position of the hopper body; if the position and state of the hopper body can be determined, proceed to step S2; otherwise, proceed to step S3; the hopper body includes an empty state and a loaded state; S2, based on the position of the hopper body, continue with subsequent operation steps; S3, manual intervention, sending the hopper body to the designated position, inputting the position program to confirm the position of the hopper body, and then proceeding to step S2 after confirmation. This invention is rationally designed, compact in structure, and easy to use.

The invention discloses an exterior part plate and a preparation method thereof, an exterior part and a forming process thereof, and a vehicle, and belongs to the technical field of vehicles. The core layer in the exterior part plate provided by the invention comprises the fibers and the resin matrix, and the fibers and the resin matrix are compounded, so that the rigidity and the strength of the exterior part plate can be enhanced, the linear expansion coefficient of the plate can be reduced, and the performance of an exterior part is improved. The tensile strength of an outer part prepared from the outer part plate provided by the invention is 250-650 MPa, the tensile modulus is 10-25 GPa, and the bending modulus is 8-30 GPa, so that the rigidity and the strength of the outer part are well improved. Meanwhile, the linear expansion coefficient ranges from 7 * 10 <-6 > m / (m.k) to 25 * 10 <-6 > m / (m.k), so that the thermal dimensional stability of the outer part can be effectively controlled, and the fit clearance of the outer part is improved.

The utility model belongs to low altitude flight product technical field provides a kind of detachable low altitude aircraft transparent part, including transparent piece, sealing strip and fuselage, sealing strip is located between transparent piece and fuselage and is used to install seal between transparent piece and fuselage, there is detachable connecting structure between transparent piece and fuselage, transparent piece is connected and installed with fuselage by detachable connecting structure.The utility model's advantage lies in adopting sealing ring bolt mounting structure, instead of glue structure, simple installation, small stress, substantially reduce production working hour cost, improve the production efficiency and pass rate of product, sealing strip structure also improves transparent piece and fuselage cooperation gap and appearance effect, also facilitate post-period disassembly and maintenance.

The invention relates to the technical field of vehicle traction devices, and particularly discloses a traction mechanism and a vehicle, the traction mechanism comprises a fixing assembly, a driving shaft, a driving piece, a traction hook body, a driving seat and a locking assembly, and the fixing assembly is provided with a storage hole and a through hole communicating with the storage hole; the driving shaft penetrates through the accommodating hole and can rotate relative to the fixing assembly; the driving piece is in transmission connection with one end of the driving shaft; the traction hook body rotationally sleeves the outer side of the fixing assembly and is in transmission connection with the driving shaft; the driving seat fixedly sleeves the driving shaft and extends into one end, close to the driving piece, of the accommodating hole; the driving seat is provided with a first transmission part; the locking assembly comprises a sliding piece and a locking piece, the driving shaft is sleeved with the sliding piece in a sliding mode and located in the containing hole, the sliding piece is provided with a second transmission part abutting against the first transmission part in a sliding mode, and the locking piece is movably arranged on the sliding piece and can move in the radial direction of the driving shaft. According to the traction mechanism, the stability in the locking state is improved, and the service life is prolonged.

The invention provides a multistage shield pump capable of prolonging the service life. The multistage shield pump comprises a machine base, a machine shell, a pump shell, a pump body, an upper bearing, a middle bearing, a lower bearing, a rotor, a stator, an upper sheath, a lower sheath, a motor rotating shaft and an impeller shaft. The upper sheath, the lower sheath and the outer wall of the stator are sleeved with an integrally-formed stator shielding sleeve, the part covering the stator core is a stator shielding sleeve a, the part covering the upper sheath and the lower sheath is a stator shielding sleeve b, a gap a is formed between the stator shielding sleeve a and the rotor shielding sleeve, a gap b is formed between the stator shielding sleeve b and the rotor shielding sleeve, and the stator shielding sleeve a and the stator shielding sleeve b are integrally formed. The distance of the gap b is greater than that of the gap a; a lower thrust plate sleeved on the rotating shaft is arranged above the lower bearing; and the lower bearing is provided with a flow guide groove and an axial thrust balance groove. The shield pump can be effectively prevented from moving, shaking and mutual interference friction, the axial force of the rotor can be reduced, abrasion of the lower thrust plate is reduced, and the service life of the shield pump is prolonged.

The utility model belongs to the technical field of fire grate segments, and particularly relates to a novel fixed fire grate segment and a fire grate turning structure. The novel fixed fire grate segment comprises a flat plate part located in the middle of the fixed fire grate segment, and an installation part used for being installed on a fixed fire grate segment supporting beam is arranged on the bottom face of the flat plate part. The first connecting part is positioned at the end part of the flat plate part towards the incoming material side; the second connecting part is positioned at the end part, facing the material removing side, of the flat plate part; a reinforcing layer is arranged on the side face of the first connecting part. The novel fixed fire grate segment is simple in structure, and the wear-resistant reinforcing layer is additionally arranged at the head of the fixed fire grate segment, so that the service life is prolonged; according to the novel fixed fire grate segment, the requirement for replacing the whole original fixed fire grate segment can be met only by surfacing the head, the later operation and maintenance cost is greatly reduced, the interval of the equipment overhaul period is increased, garbage raw materials can be prevented from entering an ash hopper during overturning, and the ignition loss rate is reduced.