42results about How to "Reduce face pressure" patented technology

A belt deceleration device for an electric power steering device, comprising: a driving pulley with a first helical tooth, a driven pulley with a second helical tooth, a driving belt with a third helical tooth, at the twist angle of each helical tooth Between β and the coefficient of friction μ between the first or second helical teeth and the third helical teeth, a relationship of tan β<μ is maintained. In addition, in the electric power steering device, the backlash adjustment between the gears meshing in the speed reduction device, or the adjustment of the belt tension of the speed reduction device is performed.

In cleaning devices, process cartridges and image forming devices, a cleaning structure with low linear pressure and high surface pressure can be obtained by specifying the material, shape and support structure of the cleaning blade. Press the front end corners of the elastic cleaning blade (38) supported by the so-called sheet holder, that is, the supporting member (37), on the roller-shaped and belt-shaped image carrier (10), and remove the residue remaining on the image carrier after image transfer. body toner. In such a cleaning device (16), the angle (θ) forming the front end corner line portion (36) of the cleaning blade is formed as an obtuse angle, and the front end corner line portion is formed at a surface pressure greater than or equal to 2.0 g/mm2. Press on the image carrier. The so-called surface pressure refers to the value obtained by dividing the total load applied to the cleaning blade by the contact area of ​​the cleaning blade with respect to the member to be cleaned.

The invention provides a reaping pre-treatment configuration of combine harvester capable of maintaining the good degree of reaping work of the main and assistant cutting devices and causing the strain height of the remained strains to be accordant by improving the assistant cutting device. An assistant cutting device (14) acting for the vertical straws on the position lower than the main cutting device (9) for reaping the vertical straws is provided. The assistant cutting device (14) is freely supported by a lifting frame (13). The assistant cutting device (14) and the main cutting device (13) are formed that, under the situation of cutting the height adjustment and operating the work, the assistant cutting device (14) is maintained at the state of free of linking with the lifting action of the main cutting device (9), during rotating, the assistant cutting device (14) is linked with the lifting action of the main cutting device (9).

In the power transmission mechanism T of a sewing machine provided with a crank rod, a first gear and a second gear for dynamically connecting an upper shaft for vertically moving a sewing needle 16 and a lower shaft for swinging a shuttle, a grease holding member impregnated with grease is brought into contact with at least one of the first gear and the second gear and the grease is applied to the respective gear.

The invention relates to a tripod constant velocity universal joint in which only journal surfaces of leg shafts can restrain the position of needle rollers relative to the axial direction. In the tripod constant velocity universal joint, a groove (2) capable of receiving the needle rollers (6) and functioning as a rolling surface for the needle rollers (6) is formed on the outer peripheral surface of a leg shaft (1) in the circumferential direction of the leg shaft. A semisolid or solid lubricant having the consistency number 0, 1, or 2 assists the needle rollers (6) to be retained and aligned in the groove (2).

The invention discloses an earthquake-isolation energy dissipator for an ultra-high-voltage converter transformer. The earthquake-isolation energy dissipator comprises a plurality of earthquake-isolation supports, steel plates and thin rubbers which are arranged horizontally are arranged on the earthquake-isolation supports from top to bottom at intervals, and central holes are arranged at centers of the earthquake-isolation supports and provided with lead cores inside. The earthquake-isolation energy dissipator is characterized by further being provided with a squared foundation valve plate composed by steel beams, an upper connecting plate and a lower connecting plate, wherein the plurality of earthquake-isolation supports are installed at steel beam nodes of the foundation valve plate, the upper connecting plate and the lower connecting plate are parallel, and the upper and lower surfaces of the earthquake-isolation supports are connected with the centers of the upper connecting plate and the lower connecting plate respectively. According to the earthquake-isolation energy dissipator, the stability is guaranteed, simultaneously, the horizontal stiffness is small, the earthquake-isolation damping effect can be improved, soft limiting and anti-falling functions are provided, the safety of the earthquake-isolation energy dissipator under the action of earthquakes can be guaranteed, when the earthquake-isolation fails, a certain damping effect is also provided, and the safety function is provided in case of failure. The earthquake-isolation energy dissipator is low in construction cost, simple in construction and provided with good social benefits.

The invention discloses an engine piston connecting rod assembly, and relates to the field of engine pistons. The engine piston connecting rod assembly adopts a wedge connecting rod structure and an inner cavity matched with the wedge structure, the stress area is increased, the face pressure of a movable piston hole and the piston head breaking risk are reduced, a lining ring is additionally arranged on the small end of a connecting rod, the lubricating amount and the lubricating area are increased, the wear between the connecting rod and the piston head is reduced, an oil way is added on the connecting portion of a connecting rod small end and a connecting rod large end, through the structure, the weight of the connecting rod is reduced, the lubricating oil can be sufficiently used, a bearing bush arranged on the connecting rod large end is lubricated, a positioning groove of the connecting rod large end is used, moving of the bearing bush is controlled, and risks of uneven bearing bush stress and bearing bush missing are reduced.

The invention provides a chain which enables to effectively reduce sliding contact resistance and wear of the parts that come into sliding contact. The chain (100) comprises multiple link plates (110), (120) which, with front and rear pin holes, are rotatably interconnected and are slidingly contacted by a guide member (150). The edge (121) of at least one link plate (120) that comes into sliding contact forms a convex curvature with continuous curvatures in the direction the chain is extended. Meanwhile, the apex (123) of the edge (121) of the convex curvature is located at a position equidistant from centers of the front and rear pin holes. The convex edge (121) has different curvatures on front and rear sides of the apex.

The face pressure reducer of closed compressor includes cylinder, rotation shaft, upper and lower bearing boards, partition board, guide board and spring for guide board. Technologically, the present invention features that at least one notched pressure exhausting spigot is set on the thrust bearing side of each bearing board axially supporting the rotation shaft or one thrust side of the rotation shaft corresponding to the thrust bearing side of each bearing board, and the pressure exhausting spigot has certain volume to hold compressed gas. The present invention can reduce face pressure acting on the thrust bearing of bearing board or on the thrust bearing of the rotation shaft and prevent the wear of the two parts.

The invention provides a worm gear mechanism. The worm gear mechanism (44) is configured to comprise a worm (70) which is connected to an electric motor, and a worm wheel (80) engaged with the worm. In the worm wheel (80), at least a tooth flank (81a) is formed of a resin material. In the tooth flank (81a), an engagement recess (81dr), which is based on a the trajectory of a contact point being in contact with a tooth (71) of the worm (70) according to a rotation of the worm (70), is formed by injection molding only, together with the tooth flank, using a mold (100). The engagement recess (81dr) comprises a plurality of points (P1a-P9a) which are recessed the most in a the direction of a tooth of the tooth flank of the worm wheel correspondingly to the trajectory of the contact point with which the most convex portion of the tooth (71) of the worm (70) is in contact. A line (Loa) which connects the plurality of points intersects with respect to a tooth width center line (Ct) of the tooth flank (81a) of the worm wheel (80).

The invention relates to the technical field of idle gear shafts, and discloses an idle gear device and an engine. The idle gear device comprises an idle gear, a bearing bush and two idle gear shafts.A center hole is formed in the idle gear. The bearing bush is arranged in the center hole of the idle gear. A center hole of the bearing bush comprises two conical holes symmetrically formed. The large-diameter ends of the conical holes are located outside the bearing bush. Each idle gear shaft is in a circular truncated cone shape. The two idle gear shafts are arranged in the conical holes correspondingly and can rotate relative to the bearing bush. A lubrication gap is formed between the outer wall of each idle gear shaft and the inner wall of the corresponding conical hole. The idle gear device can bear axial force and prevent axial movement of the idle gear shafts and eccentric wear of the idle gear shafts and the bearing bush, and reliability of the idle gear device is improved.

The invention provides a pump device and a vehicle. The pump device comprises a shell, a motor part, a pump part, a first bearing and a thrust lubrication groove. Wherein the shell is provided with a cavity; the motor part is arranged in the cavity and comprises a rotating shaft rotating around the central axis of the motor part. The pump part is arranged on the axial side of the motor part and makes contact with the rotating shaft, and the pump part can be driven by the rotating shaft to rotate. The first bearing is connected with the shell, sleeves the rotating shaft and is located on the side, away from the motor part, of the pump part. The thrust lubrication groove is formed in the end face, close to the pump part, of the first bearing and communicates with a shaft hole of the first bearing. Lubricating oil in the thrust lubricating groove can flow to the end face gap between the first bearing and the pump part, so that fluid lubrication is formed on the contact end faces of the first bearing and the pump part, the abrasion condition of the contact end faces of the pump part and the first bearing is greatly improved, power consumption is reduced, and in addition, operation noise of the pump device can be reduced.