CN217002714U - Palm-shaped retainer and lead screw sealing bearing - Google Patents

Abstract

The utility model provides a palm-shaped retainer and a lead screw sealing bearing. The stainless steel ball rolling bearing comprises an asymmetric army steel outer ring, an army steel inner ring, an army steel rolling body, a nylon GRF66-10% retainer, a double-lip rubber sealing ring and a steel skeleton; asymmetric army first steel outer lane is equipped with the unequal straight slope that can the lock ball, the flange is not high about the army first steel inner circle, nylon GRF66-10% holder is provided with half wide 44 degrees slope claws, its pocket hole adopts the protruding lock ball mode setting of circularity, the circularity arch in pocket hole is provided with 10 degrees outer camber angles, the protruding contained angle of circularity in pocket hole is 30 degrees, the steel skeleton outward flange is provided with 7 degrees camber angles, two lip rubber seal includes inside, outer double-deck is sealed, for interior two lip seal structure, two lip rubber seal top left side is provided with 15 degrees camber angles, the right side is provided with 30 degrees angle of inclination, the below left side is provided with the closed angle arch of outer 15 degrees slopes, the bellied apex angle of closed angle is 15 degrees angle of inclination. The utility model has light weight, small friction and self-lubrication, and is suitable for high-speed operation.

Description

Palm-shaped retainer and lead screw sealing bearing

Technical Field

The utility model relates to the technical field of precision machine tools, in particular to a palm-shaped retainer and a lead screw sealing bearing.

Background

The palm-shaped retainer and the lead screw sealing bearing have no product in China, and the structure of the product is not optimized in the world; most manufacturers import the bearing, the palm-shaped retainer and the lead screw sealing bearing which are produced and manufactured at present in China have a large and unreasonable structure, various performance indexes can not meet the requirements, the retainer has a complex, large and heavy structure, the use performance of the bearing is directly influenced, the service life of the bearing is shortened, and the phenomena of high noise and inflexible rotation are presented. The introduced imported bearing is very little, the installation of the fittings of enterprises is not suitable, the price is high, and the burden is brought to the enterprises. The design of the structure is tried all the time in China, and the selection of several types of structures is unsuccessful, so that a palm-shaped retainer and a lead screw sealing bearing meeting the requirements are urgently needed in the market.

Disclosure of Invention

The utility model aims to provide a high-speed self-lubricating high-speed rotating shaft which is light in weight, small in friction and suitable for high-speed operation. The sealing form adopts double-lip contact sealing, and the dustproof effect is good. The palm-shaped retainer and the lead screw sealing bearing have the advantages of large bearing capacity, good speed performance, strong rigidity and 5 times prolonged service life.

The purpose of the utility model is realized by the following steps: the steel-reinforced plastic composite material comprises an asymmetric army steel outer ring, an army steel inner ring, army steel rolling bodies, a nylon GRF66-10% retainer, a double-lip rubber sealing ring and a steel skeleton; the asymmetric army armor steel outer ring and a mechanical part shell are installed and matched to bear axial load and radial load, the asymmetric army armor steel outer ring is provided with unequal straight slopes capable of locking balls, the army armor steel inner ring and the mechanical part shaft are installed and assembled together to bear partial radial force and partial axial force, the left and right flanges of the army armor steel inner ring are unequal in height, a nylon GRF66-10% retainer is provided with an inclined claw with the half width of 44 degrees, its pocket hole adopts the protruding locking ball mode setting of circularity, and the circularity arch in pocket hole is provided with 10 degrees outer camber angles, and the protruding contained angle of circularity in pocket hole is 30 degrees, and the steel skeleton outward flange is provided with 7 degrees camber angles, and two lip rubber seal includes inside and outside double-deck sealed, for interior two lip seal structure, is provided with 15 degrees camber angles in two lip rubber seal top left sides, and the right side is provided with 30 degrees angle of inclination, and the below left side is provided with the closed angle arch of outer 15 degrees slopes, and the bellied apex angle of closed angle is 15 degrees angle of inclination.

The utility model also has the technical characteristics that:

1. the included angle between the mounting and matching part of the outer side of the asymmetric army steel outer ring and the mechanical part shell and the matching part of the outer side of the nylon GRF66-10% retainer on the inner side of the asymmetric army steel outer ring is 45 degrees, and the included angle between the inner side of the nylon GRF66-10% retainer on the inner side of the asymmetric army steel outer ring is 5 degrees;

2. the left flange inboard of army first steel inner circle be provided with 30 degrees outer arc angles, the concave outward flange that rises of right flange inboard of army first steel inner circle is provided with 30 degrees outer arc angles, the inward flange is provided with 5 degrees outer arc angles.

The utility model establishes a complete dynamic model, reveals a high-speed bearing slipping mechanism and obtains a high-speed bearing slipping condition; disclosing the change rule of a raceway oil supply layer and constructing a multi-factor coupling full-scale lubrication contact model; revealing the influence rule of each factor on the lubricating performance; the change rule of the high-speed lubricating oil film under the oil-gas lubricating condition is researched. A thermal analysis model of the rolling bearing is constructed, the temperature rise change rule of the high-speed bearing is researched, and a thermal failure mechanism of the high-speed bearing is disclosed. The main parameters of the overall design are based on the latest design concept, and can be compared favorably with similar products of the NSK bearing company in Japan; ZGCr 15-army first steel material rolling body, tolerance grade of P4 and P2, and limit value standard reaching Z3 and V4; the structural design is optimized, the bearing ring meets the series standards of ISO19 and ISO10 sizes, the ZGCr 15-army armor steel material bearing ring is provided with an asymmetric army armor steel outer ring with unequal height slopes and ball locking height; an asymmetric army steel outer ring, a nylon GRF66-10% retainer is made of GRF66-10% nylon material; the number of rolling elements is generally more, the nylon GRF66-10% retainer takes a half-width 44-degree inclined claw form, and a pocket adopts a roundness convexity ball locking mode, so that the weight is reduced, the ball is reliably locked, and a palm-in-palm-shaped structure is optimized, so that the bearing has the advantages of high limit revolution, good rigidity, low vibration, low noise, high rotation precision and low friction. The normal operation of the bearing is ensured; long service life, corrosion resistance, good sealing effect, convenient installation and low cost. A special heat treatment process is adopted.

The utility model has the following beneficial effects: 1) the rolling body made of ZGCr 15-army armor steel material is corrosion-resistant, self-lubricating, long in service life, high in bearing capacity and high in rigidity; 2) the tolerance grades of P4 and P2 can ensure that the bearing has good running precision and short running-in time; 3) the structural design is optimized to facilitate installation; 4) conform to ISO19 and ISO10 size series standards, have compact cross-sectional areas; 5) the ZGCr 15-army armor steel sleeve prolongs the service life of the bearing and has excellent corrosion resistance; 6) the outer guide structure has high speed performance; 7) the asymmetric army armor steel outer ring is provided with unequal heights, so that the installation time can be saved; 8) the shape of the roller path is closely related to the action of centrifugal force, and the flowing and backfilling of a lubricating medium are under the action of the centrifugal force and surface tension, so that the maintenance of the bearing is reduced, and the oil lubrication is optimized; 9) the asymmetric army steel outer ring can bear axial load or radial load (load limited to one direction) 10) the nylon GRF66-10% retainer is made of GRF66-10% nylon material, so that the mass is reduced, and the limit revolution is improved by 50%; 11) the optimized nylon GRF66-10% retainer structure can provide good lubrication for the contact area of the ball and the channel. 12) The double-lip rubber sealing ring can prevent dust.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of an asymmetric army armor steel outer ring;

FIG. 3 is a left side enlarged view of FIG. 2;

FIG. 4 is a schematic structural diagram of a army armor steel inner ring;

FIG. 5 is a left side enlarged partial view of FIG. 4;

FIG. 6 is a schematic structural view of a double-lip rubber seal ring;

FIG. 7 is a schematic view of a steel skeleton structure;

FIG. 8 is a schematic view of a nylon GRF66-10% cage structure;

FIG. 9 is a cross-sectional view of the AOB of FIG. 8;

fig. 10 is a partial enlarged view of fig. 8 taken along line C.

Detailed Description

The utility model is further described with reference to the accompanying drawings in which:

with reference to fig. 1-10, the present embodiment includes an asymmetric army steel outer ring 1, an army steel inner ring 2, an army steel rolling element 4, a nylon GRF66-10% retainer 3, a double-lip rubber seal ring 5, and a steel skeleton 6; the asymmetric army armor steel outer ring 1 is installed and matched with a mechanical part shell to bear axial load and radial load, the asymmetric army armor steel outer ring 1 is provided with unequal straight slopes capable of locking balls, the army armor steel inner ring 2 is installed and matched with a mechanical part shaft to bear partial radial force and partial axial force, the left and right flanges of the army armor steel inner ring 2 are unequal in height, a nylon GRF66-10% retainer 3 is provided with a half-width inclined claw with 44 degrees, a pocket hole of the nylon GRF66-10% retainer is arranged in a circular bulge ball locking mode, a circular bulge of the pocket hole is provided with a 10-degree outer arc angle, a circular bulge included angle of the pocket hole is 30 degrees, the outer edge of a steel skeleton 6 is provided with a 7-degree arc angle, a double-lip rubber sealing ring 5 comprises an inner layer seal and an outer layer seal structure, the left side above the double-lip rubber sealing ring is provided with a 15-degree arc angle, the right side is provided with a 30-degree inclination angle, the left side below is provided with an outer 15-degree inclined sharp-angle bulge, the apex angle of the sharp-angled protrusion is an inclined angle of 15 degrees. The included angle between the mounting and matching position of the outer side of the asymmetric army steel outer ring 1 and the mechanical part shell and the matching position of the outer side of the asymmetric army steel outer ring inner side nylon GRF66-10% retainer is 45 degrees, and the included angle between the inner side of the asymmetric army steel outer ring inner side nylon GRF66-10% retainer is 5 degrees; the left flange inboard of first steel inner circle 2 of army is provided with 30 degrees outer arc angles, and the concave outward flange that rises of right flange inboard of first steel inner circle 2 of army is provided with 30 degrees outer arc angles, and the inward flange is provided with 5 degrees outer arc angles.

Claims (3)

1. A palm-shaped retainer and lead screw sealing bearing is characterized by comprising an asymmetric army steel outer ring, an army steel inner ring, an army steel rolling body, a nylon GRF66-10% retainer, a double-lip rubber sealing ring and a steel framework; the asymmetric army armor steel outer ring and a mechanical part shell are installed and matched to bear axial load and radial load, the asymmetric army armor steel outer ring is provided with unequal straight slopes capable of locking balls, the army armor steel inner ring and a mechanical part shaft are installed and assembled together to bear partial radial force and partial axial force, the left and right retaining sides of the army armor steel inner ring are unequal in height, a nylon GRF66-10% retainer is provided with an inclined claw with the half width of 44 degrees, its pocket hole adopts the protruding locking ball mode setting of circularity, and the circularity arch in pocket hole is provided with 10 degrees outer camber angles, and the protruding contained angle of circularity in pocket hole is 30 degrees, and the steel skeleton outward flange is provided with 7 degrees camber angles, and two lip rubber seal includes inside and outside double-deck sealed, for interior two lip seal structure, is provided with 15 degrees camber angles in two lip rubber seal top left sides, and the right side is provided with 30 degrees angle of inclination, and the below left side is provided with the closed angle arch of outer 15 degrees slopes, and the bellied apex angle of closed angle is 15 degrees angle of inclination.

2. The palm-shaped retainer and lead screw sealing bearing as claimed in claim 1, wherein the included angle between the fitting position of the outer side of the asymmetric army steel outer ring and the mechanical part shell and the fitting position of the inner side of the asymmetric army steel outer ring, nylon GRF66-10%, of the outer side of the retainer is 45 degrees, and the included angle between the inner side of the asymmetric army steel outer ring, nylon GRF66-10%, of the inner side of the retainer is 5 degrees.

3. The palm-shaped retainer and lead screw sealing bearing as claimed in claim 2, wherein the left rib of the army steel inner ring is provided with 30 degrees of outer arc angle at the inner side, the concave raised outer edge of the right rib of the army steel inner ring is provided with 30 degrees of outer arc angle, and the inner edge is provided with 5 degrees of outer arc angle.

Images