CN112160982A - Maintenance-free bearing for agricultural harvester and manufacturing method thereof - Google Patents

Maintenance-free bearing for agricultural harvester and manufacturing method thereof Download PDF

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Publication number
CN112160982A
CN112160982A CN202011196569.1A CN202011196569A CN112160982A CN 112160982 A CN112160982 A CN 112160982A CN 202011196569 A CN202011196569 A CN 202011196569A CN 112160982 A CN112160982 A CN 112160982A
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China
Prior art keywords
bearing seat
bearing
end cover
ring
transmission shaft
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CN202011196569.1A
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Chinese (zh)
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CN112160982B (en
Inventor
俞玉兰
黄耿良
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Xinchang Linquan Bearing Co ltd
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Xinchang Linquan Bearing Co ltd
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Publication of CN112160982A publication Critical patent/CN112160982A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/40—Ball cages for multiple rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/061—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing mounting a plurality of bearings side by side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/06—Shaping by casting in situ casting or moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/02—Mechanical treatment, e.g. finishing
    • F16C2223/06—Mechanical treatment, e.g. finishing polishing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2310/00—Agricultural machines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a maintenance-free bearing for an agricultural harvester and a manufacturing method thereof. The method comprises the following steps: the method comprises the steps of processing an inner bearing seat and an outer bearing seat, processing a transmission shaft, processing a first bearing and a second bearing, processing an inner end cover and an outer end cover, and assembling a maintenance-free bearing. The invention can greatly improve the strength and stability of the whole maintenance-free bearing, prolong the service life of the maintenance-free bearing, reduce the friction force when the transmission shaft rotates, and further improve the stability and reliability of the hub when rotating.

Description

Maintenance-free bearing for agricultural harvester and manufacturing method thereof
Technical Field
The invention relates to a maintenance-free bearing for an agricultural harvester and a manufacturing method thereof.
Background
The maintenance-free bearing refers to a rolling bearing which can stably work for a long time without maintenance after being mounted to a failure, and has excellent performances of maintenance-free, high performance, long service life, more environmental protection, reliability and durability.
Agricultural is ploughed soil preparation machinery and is suppressed mechanical operational environment abominable, and the rolling bearing subassembly that traditional agricultural is ploughed soil preparation machinery and is suppressed the mechanical most direct use UCF ectosphere bearing frame that uses, but this kind of bearing frame is because seal structure is simple and for single-row ball bearing, and abominable operational environment when can't bear soil preparation suppression needs to change the bearing many times in a period of ploughing, can't satisfy the requirement of actual work, causes the waste of serious production time and cost.
Disclosure of Invention
The invention aims to provide a maintenance-free bearing for an agricultural harvester and a technical scheme of a manufacturing method thereof aiming at the defects in the prior art, the structure can greatly improve the strength and the stability of the whole maintenance-free bearing, prolong the service life of the maintenance-free bearing, reduce the friction force of a transmission shaft during rotation and further improve the stability and the reliability of a hub during rotation, and the manufacturing method has simple steps, not only effectively improves the processing and assembling precision of the bearing, but also greatly improves the reliability of the whole maintenance-free bearing.
In order to solve the technical problems, the invention adopts the following technical scheme:
agricultural harvester is with non-maintaining bearing, its characterized in that: the oil storage device comprises an inner bearing seat, an outer bearing seat, a transmission shaft, a first bearing and a second bearing, wherein the first bearing is arranged in the inner bearing seat, the second bearing is arranged in the outer bearing seat, the inner bearing seat and the outer bearing seat are connected in a matched mode to form an oil storage cavity, the transmission shaft is connected in the oil storage cavity through the first bearing and the second bearing, and two sides of the transmission shaft are respectively connected with the end portions of the inner bearing seat and the outer bearing seat through an inner end cover and an outer end cover; through the design of inner bearing frame and outer bearing frame, can improve whole non-maintaining bearing's intensity and stability greatly, compare in adopting the unilateral to connect this structure more reliable and stable, the life of non-maintaining bearing has been prolonged, through the design of first bearing and second bearing, frictional force when not only can reducing the transmission shaft rotation, and the stability of whole non-maintaining bearing has been improved, stability and reliability when further can improving wheel hub rotation, can load lubricating oil in the oil storage chamber, because lubricating oil can not spill over in the confined cavity, good sealing performance has, inner end cover and outer end cover not only can play the effect of auxiliary stay to the transmission shaft, and can realize that the oil storage chamber is sealed, reduce the noise of bearing during operation, reduce wearing and tearing.
Further, first bearing and second bearing all include the inner race, outer ferrule, keep ware and ball, be provided with the shaft shoulder on the transmission shaft, the inner race is located between two adjacent shaft shoulders, outer ferrule fixed connection is on the inner wall of inner bearing frame and outer bearing frame, keep the ware to be located between inner race and the outer ferrule, ball evenly distributed is on the ware, the symmetry is provided with two rows of slots respectively on the outer wall of inner race and the inner wall of outer ferrule, the ball is spacing in the slot, through the inner race, outer ferrule, keep the design of ware and ball, not only can improve stability and reliability when the transmission shaft is rotatory, and can make and produce relative rotation between transmission shaft and inner bearing frame and the outer bearing frame, keep the ware and can reduce the frictional force between inner race and the outer ferrule.
Further, the retainer comprises an annular retainer, positioning holes are uniformly formed in the annular retainer, the balls are matched with the positioning holes, a certain distance can be kept between every two adjacent balls through the annular retainer, abrasion caused by mutual collision is avoided, and the positioning holes are used for limiting the balls.
Further, interior end cover and outer end cover all include end cover dish and first retaining ring, first retaining ring is located on the outer circumference side of end cover dish, evenly be provided with the second mounting hole on the circumference of first retaining ring, the tip medial surface of inner bearing frame and outer bearing frame is provided with the draw-in groove, first retaining ring and draw-in groove phase-match, the center of end cover dish is provided with the shaft hole, mechanical seal between shaft hole and the transmission shaft, first retaining ring has improved intensity and the stability of being connected between end cover dish and inner bearing frame or the outer bearing frame, convenient to install and dismantle, mechanical seal can seal the gap between end cover dish and the transmission shaft, prevent that lubricating oil from spilling over.
Further, evenly be provided with the boss on the medial surface of end cover dish, the outside of boss is provided with spacing, forms the cavity between spacing and inner bearing frame and the outer bearing frame, installs first sealing washer in the cavity, and the design of boss can improve the intensity of end cover dish, improves the anti axial impact force of inner end cover or outer end cover, and spacing is carried out spacing fixed to first sealing washer.
Furthermore, second positioning rings are arranged on the inner bearing seat and the outer bearing seat respectively, a second sealing ring and a third sealing ring are arranged between every two adjacent second positioning rings, the second sealing rings are located on the inner sides of the third sealing rings, the joints between the inner bearing seats and the outer bearing seats can be sealed through the second sealing rings, the lubricating oil in the oil storage cavity is prevented from leaking out, the third sealing rings can be used for secondary sealing, and the sealing performance is improved through connection with an agricultural harvester frame.
Furthermore, one side of second holding ring is provided with first seal groove and second seal groove, and first seal groove is located the inboard of second seal groove, and first seal groove and second seal groove all are the loop configuration, have improved the stability and the reliability of first sealing washer and second sealing washer installation.
Furthermore, the vertical section of the first sealing groove is U-shaped, the vertical section of the second sealing groove is an arc segment of 1/4, the structural design can meet the assembly of a sealing ring with an H-shaped section and an O-shaped ring, and the sealing performance is improved.
Furthermore, first mounting holes are uniformly formed in the inner bearing seat and the outer bearing seat, and bolts penetrate through the first mounting holes in the two sides, so that the inner bearing seat, the outer bearing seat and the agricultural harvester frame can be fixedly connected, and the agricultural harvester frame is convenient to mount and dismount.
The manufacturing method of the maintenance-free bearing for the agricultural harvester is characterized by comprising the following steps:
1) machining of inner bearing block and outer bearing block
a. Firstly, the sizes of an inner bearing seat and an outer bearing seat are determined according to design requirements, the required inner bearing seat and the required outer bearing seat are formed through casting molding, the inner bearing seat and the outer bearing seat are polished, the assembly precision is improved, and the noise generated during the operation of a maintenance-free bearing is avoided;
b. then, clamping grooves are formed along the inner sides of the outer ends of the inner bearing seat and the outer bearing seat, and through holes are uniformly formed along the end faces, so that the through holes penetrate into the clamping grooves, the sizes of the clamping grooves on the inner bearing seat and the outer bearing seat are consistent, the inner end cover and the outer end cover are convenient to mount, and the sealing effect of the maintenance-free bearing is improved;
c. a second positioning ring with the matched size is arranged on one side, connected with the inner bearing seat and the outer bearing seat, of the inner bearing seat, a first sealing groove and a second sealing groove are arranged on the end face connected with the second positioning ring, the first sealing groove is located on the inner side of the second sealing groove, and the second sealing groove is arranged along the outer circumferential side face of the second positioning ring, so that a second sealing ring and a third sealing ring can be conveniently installed, and the sealing performance of the inner bearing seat and the outer bearing seat in connection is improved;
d. finally, first mounting holes are uniformly formed along the connecting end of the inner bearing seat and the outer bearing seat, so that the first mounting holes on the inner bearing seat and the outer bearing seat correspond to each other one by one, and the whole maintenance-free bearing is conveniently and fixedly connected with a frame of the agricultural harvester;
2) transmission shaft machining
a. Firstly, determining the size of a transmission shaft according to the design sizes of an inner bearing seat and an outer bearing seat, processing the corresponding transmission shaft, and grinding and polishing the outer surface of the transmission shaft;
b. then two groups of limiting assemblies are installed along the set position on the transmission shaft, each group of limiting assemblies comprises two shaft shoulders with the same size, the distance between every two adjacent shaft shoulders is kept equal, the stability and the reliability of installation of the first bearing and the second bearing can be improved through the design of the shaft shoulders, and the stability and the reliability of the maintenance-free bearing during working are further improved;
3) first bearing and second bearing machining
a. Firstly, determining the sizes of a first bearing and a second bearing according to the distance between a transmission shaft and an inner bearing seat and an outer bearing seat and the distance between two adjacent shaft shoulders, and processing a corresponding outer ring, an inner ring and a retainer;
b. then, the positions and the intervals of the grooves on the outer ring and the inner ring are determined according to the positioning holes on the retainer, corresponding grooves are processed along the inner side surface of the outer ring and the outer side surface of the inner ring, and balls with proper sizes are selected according to the positioning holes on the retainer, so that the mounting precision of the first bearing and the second bearing is improved;
4) machining of inner end cap and outer end cap
a. Firstly, determining the sizes of an inner end cover and an outer end cover according to the sizes of clamping grooves on an inner bearing seat and an outer bearing seat, and forming the required inner end cover and outer end cover through extrusion forming to enable an end cover disc and a first positioning ring to be integrally formed, wherein the first positioning ring is positioned on the outer circumferential side surface of the end cover disc, so that the size of the first positioning ring is matched with the size of the clamping grooves, and the connection stability between the end cover disc and the clamping grooves is improved;
b. then, corresponding shaft holes are formed along the center of the end cover disc according to the size of the transmission shaft, and second mounting holes matched with the through holes are formed along the circumference of the first positioning ring according to the positions of the through holes in the clamping grooves;
c. then, reinforcing blocks are uniformly arranged on the inner side face of the end cover disc, and limiting strips are horizontally arranged on the outer end face of each reinforcing block, so that the strength and the shock resistance of the end cover disc are improved;
5) maintenance-free bearing assembly
a. Firstly, clamping the processed inner ring into the corresponding two shaft shoulders along the axial direction of the transmission shaft for fixing, then sleeving the retainer outside the corresponding inner ring through the balls, and simultaneously fixedly installing the processed outer ring on the inner sides of the inner bearing seat and the outer bearing seat according to design requirements;
b. then, the inner bearing seat and the outer bearing seat are spliced, a second sealing ring is arranged in a first sealing groove on the connecting end face, and the transmission shaft assembled with the inner ring is arranged in an oil storage cavity formed by connecting the inner bearing seat and the outer bearing seat, so that the first bearing and the second bearing are connected and matched;
c. then, a first sealing ring is installed at a set position on the inner side of the end part of the outer bearing seat, mechanical sealing is conducted along one side, close to the first sealing ring, of the transmission shaft, meanwhile, the processed outer end cover is inserted into a clamping groove in the outer bearing seat, and the outer end cover and the outer bearing seat are fixedly connected through a screw penetrating through the through hole and the second installation hole;
c. finally, the inner bearing seat and the outer bearing seat are inverted, one side with the outer end cover is vertically downward, lubricating oil is injected into the oil storage cavity from the port of the inner bearing seat, after the lubricating oil reaches a set amount, the injection is stopped, the first sealing ring is installed at a set position on the inner bearing seat, one side of the transmission shaft close to the first sealing ring is mechanically sealed, the processed inner end cover is inserted into a clamping groove on the inner bearing seat, and the inner end cover and the inner bearing seat are fixedly connected by penetrating a screw through the through hole and the second mounting hole;
d. the assembled bearing is assembled on an agricultural harvester, a third sealing ring is arranged in the agricultural harvester and the second sealing groove, meanwhile, bolts penetrate through first mounting holes in the inner bearing seat and the outer bearing seat to achieve fixed connection of the maintenance-free bearing and the agricultural harvester, one side, close to the outer end cover, of the transmission shaft is connected with a hub plate of the agricultural harvester, and one side, close to the inner end cover, of the transmission shaft is connected with a power output shaft of a motor of the agricultural harvester.
The manufacturing method of the maintenance-free bearing is simple in steps, not only is the precision of bearing processing and assembling effectively improved, but also the reliability of the whole maintenance-free bearing is greatly improved.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. through the design of inner bearing frame and outer bearing frame, can improve whole non-maintaining bearing's intensity and stability greatly, compare in adopting the unilateral to connect this structure more reliable and stable, prolonged non-maintaining bearing's life.
2. Through the design of first bearing and second bearing, frictional force when not only can reducing the transmission shaft rotation has improved the stability of whole non-maintaining bearing moreover, stability and reliability when further can improving wheel hub rotation.
3. Lubricating oil can be filled in the oil storage cavity, and the lubricating oil cannot overflow when being positioned in the closed cavity, so that the sealing device has good sealing performance.
4. The inner end cover and the outer end cover can not only play a role of auxiliary support for the transmission shaft, but also realize the sealing of an oil storage cavity, reduce the noise of the bearing during working and reduce the abrasion.
5. The manufacturing method of the maintenance-free bearing is simple in steps, not only is the precision of bearing processing and assembling effectively improved, but also the reliability of the whole maintenance-free bearing is greatly improved.
Description of the drawings:
the invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is an effect diagram of a maintenance-free bearing for an agricultural harvester and a method for manufacturing the maintenance-free bearing according to the present invention;
FIG. 2 is a schematic structural view of an inner end cap and an outer end cap in the present invention;
FIG. 3 is a schematic diagram of a second retaining ring according to the present invention;
fig. 4 is a schematic view of the structure of the holder of the present invention.
In the figure: 1-an inner bearing seat; 2-an outer bearing seat; 3, driving a shaft; 4-inner end cap; 5-outer end cover; 6-shaft shoulder; 7-inner ferrule; 8-a holder; 9-a ball bearing; 10-outer ferrule; 11-a first sealing ring; 12-a card slot; 13-an oil storage chamber; 14-a second sealing ring; 15-a third sealing ring; 16-a first mounting hole; 17-end cap disk; 18-axle hole; 19-a reinforcing block; 20-a limit strip; 21-a first positioning ring; 22-a second mounting hole; 23-a second positioning ring; 24-a first seal groove; 25-a second seal groove; 26-an annular cage; 27-positioning holes.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terms first, second and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
As shown in fig. 1 to 4, the maintenance-free bearing for the agricultural harvester of the present invention comprises an inner bearing seat 1, an outer bearing seat 2, a transmission shaft 3, a first bearing and a second bearing, wherein the first bearing is arranged in the inner bearing seat 1, the second bearing is arranged in the outer bearing seat 2, the first bearing and the second bearing each comprise an inner ferrule 7, an outer ferrule 10, a retainer 8 and balls 9, a shaft shoulder 6 is arranged on the transmission shaft 3, the inner ferrule 7 is arranged between two adjacent shaft shoulders 6, the outer ferrule 10 is fixedly connected to the inner walls of the inner bearing seat 1 and the outer bearing seat 2, the retainer 8 is arranged between the inner ferrule 7 and the outer ferrule 10, the balls 9 are uniformly distributed on the retainer 8, two rows of grooves are symmetrically arranged on the outer wall of the inner ferrule 7 and the inner wall of the outer ferrule 10 respectively, the balls 9 are limited in the grooves, and by the design of the inner ferrule 7, the outer ferrule 10, the retainer, not only can the stability and the reliability of the transmission shaft 3 during rotation be improved, but also relative rotation can be generated between the transmission shaft 3 and the inner bearing seat 1 and the outer bearing seat 2, and the friction force between the inner ring 7 and the outer ring 10 can be reduced by the retainer 8. The retainer 8 comprises an annular retainer 26, positioning holes 27 are uniformly formed in the annular retainer 26, the balls 9 are matched with the positioning holes 27, a certain distance can be kept between every two adjacent balls 9 through the annular retainer 26, abrasion caused by mutual collision is avoided, and the positioning holes 27 are used for limiting the balls 9.
The inner bearing seat 1 and the outer bearing seat 2 are matched and connected to form an oil storage cavity 13, the transmission shaft 3 is connected in the oil storage cavity 13 through a first bearing and a second bearing, two sides of the transmission shaft 3 are respectively connected with the end parts of the inner bearing seat 1 and the outer bearing seat 2 through an inner end cover 4 and an outer end cover 5, the inner end cover 4 and the outer end cover 5 both comprise an end cover disc 17 and a first positioning ring 21, the first positioning ring 21 is arranged on the outer circumferential side surface of the end cover disc 17, the circumference of the first positioning ring 21 is uniformly provided with second mounting holes 22, the inner side surfaces of the end parts of the inner bearing seat 1 and the outer bearing seat 2 are provided with clamping grooves 12, the first positioning ring 21 is matched with the clamping grooves 12, the center of the end cover disc 17 is provided with a shaft hole 18, the shaft hole 18 is mechanically sealed with the transmission shaft 3, the first positioning ring 21 improves the strength and the stability of, the mechanical seal can seal the gap between the end cover disc 17 and the transmission shaft 3 to prevent lubricating oil from overflowing. Evenly be provided with reinforcing block 19 on the medial surface of end cover dish 17, the outside of reinforcing block 19 is provided with spacing 20, forms the cavity between spacing 20 and inner bearing frame 1 and the outer bearing frame 2, installs first sealing washer 11 in the cavity, and the intensity of end cover dish 17 can be improved in the design of reinforcing block 19, improves the anti axial impact force of inner end cover 4 or outer end cover 5, and spacing 20 carries out spacing fixed to first sealing washer 11. Through the design of inner bearing frame 1 and outer bearing frame 2, can improve the intensity and the stability of whole non-maintaining bearing greatly, compare in adopting the unilateral to connect this structure more reliable and stable, the life of non-maintaining bearing has been prolonged, through the design of first bearing and second bearing, frictional force when not only can reducing transmission shaft 3 rotatory, and the stability of whole non-maintaining bearing has been improved, stability and reliability when further can improving wheel hub rotation, can load lubricating oil in the oil storage chamber 13, because lubricating oil can not spill over in the confined cavity, good sealing performance has, inner end cover 4 and outer end cover 5 not only can play the effect of auxiliary stay to transmission shaft 3, and can realize that oil storage chamber 13 is sealed, reduce the noise of bearing during operation, reduce wearing and tearing.
All be provided with second holding ring 23 on inner bearing frame 1 and the outer bearing frame 2, be provided with second sealing washer 14 and third sealing washer 15 between two adjacent second holding rings 23, second sealing washer 14 is located the inboard of third sealing washer 15, can seal the junction between inner bearing frame 1 and the outer bearing frame 2 through second sealing washer 14, prevent that the lubricating oil in the oil storage chamber 13 from leaking out, third sealing washer 15 can carry out the secondary seal, through being connected with agricultural harvester frame, sealing performance is improved. One side of the second positioning ring 23 is provided with a first sealing groove 24 and a second sealing groove 25, the first sealing groove 24 is located on the inner side of the second sealing groove 25, and the first sealing groove 24 and the second sealing groove 25 are both in an annular structure, so that the stability and reliability of the installation of the first sealing ring 11 and the second sealing ring 14 are improved. The vertical section of the first sealing groove 24 is U-shaped, the vertical section of the second sealing groove 25 is an arc segment of 1/4, the structural design can meet the assembly of a sealing ring with an H-shaped section and an O-shaped ring, and the sealing performance is improved.
First mounting holes 16 are uniformly formed in the inner bearing seat 1 and the outer bearing seat 2, and bolts penetrate through the first mounting holes 16 on the two sides, so that the inner bearing seat 1, the outer bearing seat 2 and the agricultural harvester frame can be fixedly connected, and the agricultural harvester frame is convenient to mount and dismount.
The manufacturing method of the maintenance-free bearing for the agricultural harvester comprises the following steps:
1) machining of inner bearing seat 1 and outer bearing seat 2
a. Firstly, the sizes of an inner bearing seat 1 and an outer bearing seat 2 are determined according to design requirements, the required inner bearing seat 1 and the required outer bearing seat 2 are formed through casting molding, the inner bearing seat 1 and the outer bearing seat 2 are polished, the assembly precision is improved, and the noise generated during the operation of a maintenance-free bearing is avoided;
b. then, clamping grooves 12 are formed along the inner sides of the outer ends of the inner bearing seat 1 and the outer bearing seat 2, and through holes are uniformly formed along the end faces, so that the through holes penetrate into the clamping grooves 12, the sizes of the clamping grooves 12 on the inner bearing seat 1 and the outer bearing seat 2 are consistent, the inner end cover 4 and the outer end cover 5 are convenient to mount, and the sealing effect of the maintenance-free bearing is improved;
c. then, a second positioning ring 23 with matched size is arranged on one side, connected with the inner bearing seat 1 and the outer bearing seat 2, of the inner bearing seat, a first sealing groove 24 and a second sealing groove 25 are arranged on the end face connected with the second positioning ring 23, the first sealing groove 24 is located on the inner side of the second sealing groove 25, the second sealing groove 25 is arranged along the outer circumferential side face of the second positioning ring 23, the second sealing ring 14 and the third sealing ring 15 can be conveniently installed, and the sealing performance of the inner bearing seat 1 and the outer bearing seat 2 in connection is improved;
d. finally, first mounting holes 16 are uniformly formed along one end of the inner bearing seat 1 connected with the outer bearing seat 2, so that the first mounting holes 16 on the inner bearing seat 1 and the outer bearing seat 2 correspond to each other one by one, and the whole maintenance-free bearing is conveniently and fixedly connected with a frame of an agricultural harvester;
2) drive shaft 3 machining
a. Firstly, determining the size of a transmission shaft 3 according to the design sizes of an inner bearing seat 1 and an outer bearing seat 2, processing the corresponding transmission shaft 3, and grinding and polishing the outer surface of the transmission shaft 3;
b. then two groups of limiting assemblies are arranged along the set position on the transmission shaft 3, each group of limiting assemblies comprises two shaft shoulders 6 with the same size, the distance between every two adjacent shaft shoulders 6 is kept equal, the stability and the reliability of the installation of the first bearing and the second bearing can be improved through the design of the shaft shoulders 6, and the stability and the reliability of the maintenance-free bearing during working are further improved;
3) first bearing and second bearing machining
a. Firstly, determining the sizes of a first bearing and a second bearing according to the distance between a transmission shaft 3 and an inner bearing seat 1 and an outer bearing seat 2 and the distance between two adjacent shaft shoulders 6, and processing a corresponding outer ring 10, an inner ring 7 and a retainer 8;
b. then, the positions and the intervals of the grooves on the outer ring 10 and the inner ring 7 are determined according to the positioning hole 27 on the retainer 8, corresponding grooves are processed along the inner side surface of the outer ring 10 and the outer side surface of the inner ring 7, and the ball 9 with proper size is selected according to the positioning hole 27 on the retainer 8, so that the mounting precision of the first bearing and the second bearing is improved;
4) machining of the inner end cap 4 and the outer end cap 5
a. Firstly, determining the sizes of an inner end cover 4 and an outer end cover 5 according to the sizes of clamping grooves 12 on an inner bearing seat 1 and an outer bearing seat 2, forming the required inner end cover 4 and the required outer end cover 5 through extrusion forming, so that an end cover disc 17 and a first positioning ring 21 are integrally formed, the first positioning ring 21 is positioned on the outer circumferential side surface of the end cover disc 17, the size of the first positioning ring 21 is ensured to be matched with the size of the clamping groove 12, and the connection stability between the end cover disc 17 and the clamping groove 12 is improved;
b. then, according to the size of the transmission shaft 3, a corresponding shaft hole 18 is formed along the center of the end cover disc 17, and then a second mounting hole 22 matched with the through hole is formed along the circumference of the first positioning ring 21 according to the position of the through hole in the clamping groove 12;
c. then, reinforcing blocks 19 are uniformly arranged on the inner side surface of the end cover disc 17, and limiting strips 20 are horizontally arranged on the outer end surface of the reinforcing blocks 19, so that the strength and the shock resistance of the end cover disc 17 are improved;
5) maintenance-free bearing assembly
a. Firstly, clamping a processed inner ring 7 into two corresponding shaft shoulders 6 along the axial direction of a transmission shaft 3 for fixing, then sleeving a retainer 8 on the outer side of the corresponding inner ring 7 through balls 9, and simultaneously fixedly installing a processed outer ring 10 on the inner sides of an inner bearing seat 1 and an outer bearing seat 2 according to design requirements;
b. then, the inner bearing seat 1 and the outer bearing seat 2 are spliced, a second sealing ring 14 is arranged in a first sealing groove 24 on the connecting end surface, and the transmission shaft 3 assembled with the inner ferrule 7 is assembled in an oil storage cavity 13 formed by connecting the inner bearing seat 1 and the outer bearing seat 2, so that the first bearing and the second bearing are connected and matched;
c. then, a first sealing ring 11 is arranged at a set position on the inner side of the end part of the outer bearing seat 2, mechanical sealing is carried out along one side, close to the first sealing ring 11, of the transmission shaft 3, meanwhile, the processed outer end cover 5 is inserted into a clamping groove 12 on the outer bearing seat 2, and the outer end cover 5 and the outer bearing seat 2 are fixedly connected through a through hole and a second mounting hole 22 through screws;
c. finally, the inner bearing seat 1 and the outer bearing seat 2 are inverted, one side with the outer end cover 5 is made to vertically face downwards, lubricating oil is injected into the oil storage cavity 13 from the port of the inner bearing seat 1, after the lubricating oil reaches a set amount, the injection is stopped, the first sealing ring 11 is installed at a set position on the inner bearing seat 1, one side of the transmission shaft 3 close to the first sealing ring 11 is mechanically sealed, meanwhile, the processed inner end cover 4 is inserted into the clamping groove 12 on the inner bearing seat 1, and the inner end cover 4 is fixedly connected with the inner bearing seat 1 through a screw penetrating through the through hole and the second mounting hole 22;
d. the assembled bearing is assembled on an agricultural harvester, a third sealing ring 15 is arranged in the agricultural harvester and a second sealing groove 25, meanwhile, bolts penetrate through first mounting holes 16 in an inner bearing seat 1 and an outer bearing seat 2, the maintenance-free bearing is fixedly connected with the agricultural harvester, one side, close to an outer end cover 5, of a transmission shaft 3 is connected with a hub plate of the agricultural harvester, and one side, close to an inner end cover 4, of the transmission shaft 3 is connected with a power output shaft of a motor of the agricultural harvester.
The manufacturing method of the maintenance-free bearing is simple in steps, not only is the precision of bearing processing and assembling effectively improved, but also the reliability of the whole maintenance-free bearing is greatly improved.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.

Claims (10)

1. Agricultural harvester is with non-maintaining bearing, its characterized in that: including inner bearing frame, outer bearing frame, transmission shaft, first bearing and second bearing, first bearing is located in the inner bearing frame, the second bearing is located in the outer bearing frame, the inner bearing frame with the outer bearing frame cooperation is connected and is formed the oil storage chamber, the transmission shaft passes through first bearing with the second bearing is connected the oil storage intracavity, the both sides of transmission shaft are connected respectively through inner end cover and outer end cover the inner bearing frame with the tip of outer bearing frame.
2. The maintenance-free bearing for an agricultural harvester according to claim 1, wherein: the first bearing and the second bearing all include inner race, outer race, keep ware and ball, be provided with the shaft shoulder on the transmission shaft, the inner race is located adjacent two between the shaft shoulder, outer race fixed connection be in the inner bearing frame with on the inner wall of outer bearing frame, keep the ware to be located the inner race with between the outer race, ball evenly distributed is in keep the ware on, the outer wall of inner race with the symmetry is provided with two rows of slots respectively on the inner wall of outer race, the ball is spacing in the ditch inslot.
3. The maintenance-free bearing for an agricultural harvester according to claim 2, wherein: the retainer comprises an annular retainer, positioning holes are uniformly formed in the annular retainer, and the balls are matched with the positioning holes.
4. The maintenance-free bearing for an agricultural harvester according to claim 1, wherein: the inner end cover and the outer end cover both comprise end cover discs and first positioning rings, the first positioning rings are arranged on the outer circumferential side faces of the end cover discs, second mounting holes are evenly formed in the circumferences of the first positioning rings, clamping grooves are formed in the inner side faces of the end portions of the inner bearing seat and the outer bearing seat, the first positioning rings are matched with the clamping grooves, shaft holes are formed in the centers of the end cover discs, and mechanical sealing is achieved between the shaft holes and the transmission shafts.
5. The maintenance-free bearing for an agricultural harvester according to claim 4, wherein: evenly be provided with the boss on the medial surface of end cover dish, the outside of boss is provided with spacing, spacing with the inner bearing frame with form the cavity between the outer bearing frame, install first sealing washer in the cavity.
6. The maintenance-free bearing for an agricultural harvester according to claim 1, wherein: the inner bearing seat and the outer bearing seat are respectively provided with a second positioning ring, a second sealing ring and a third sealing ring are arranged between every two adjacent second positioning rings, and the second sealing rings are located on the inner sides of the third sealing rings.
7. The maintenance-free bearing for an agricultural harvester according to claim 6, wherein: one side of second holding ring is provided with first seal groove and second seal groove, first seal groove is located the inboard of second seal groove, just first seal groove with the second seal groove all is the loop configuration.
8. The maintenance-free bearing for an agricultural harvester according to claim 7, wherein: the vertical section of the first sealing groove is U-shaped, and the vertical section of the second sealing groove is 1/4 circular arc sections.
9. The maintenance-free bearing for an agricultural harvester according to claim 1, wherein: first mounting holes are uniformly formed in the inner bearing seat and the outer bearing seat.
10. A method of manufacturing a maintenance-free bearing for an agricultural harvester according to any one of claims 1 to 9, comprising the steps of:
1) machining of inner bearing block and outer bearing block
a. Firstly, determining the sizes of an inner bearing seat and an outer bearing seat according to design requirements, forming the required inner bearing seat and the required outer bearing seat through casting molding, and polishing the inner bearing seat and the outer bearing seat;
b. then, clamping grooves are formed along the inner sides of the outer ends of the inner bearing seat and the outer bearing seat, and through holes are uniformly formed along the end faces, so that the through holes penetrate into the clamping grooves, and the sizes of the clamping grooves on the inner bearing seat and the outer bearing seat are consistent;
c. then, a second positioning ring with the size matched with that of one side, which is formed by connecting the inner bearing seat and the outer bearing seat, is arranged on one side, which is connected with the inner bearing seat, of the outer bearing seat, and a first sealing groove and a second sealing groove are arranged on the end face, which is connected with the second positioning ring, so that the first sealing groove is positioned on the inner side of the second sealing groove, and the second sealing groove is arranged along the side surface of the outer circumference of;
d. finally, uniformly arranging first mounting holes along one end of the inner bearing seat connected with the outer bearing seat, so that the first mounting holes on the inner bearing seat and the outer bearing seat are in one-to-one correspondence;
2) transmission shaft machining
a. Firstly, determining the size of a transmission shaft according to the design sizes of an inner bearing seat and an outer bearing seat, processing the corresponding transmission shaft, and grinding and polishing the outer surface of the transmission shaft;
b. then two groups of limiting assemblies are arranged along the set position on the transmission shaft, each group of limiting assemblies comprises two shaft shoulders with the same size, and the distance between every two adjacent shaft shoulders is kept equal;
3) first bearing and second bearing machining
a. Firstly, determining the sizes of a first bearing and a second bearing according to the distance between a transmission shaft and an inner bearing seat and an outer bearing seat and the distance between two adjacent shaft shoulders, and processing a corresponding outer ring, an inner ring and a retainer;
b. then determining the positions and the intervals of the grooves on the outer ring and the inner ring according to the positioning holes on the retainer, processing corresponding grooves along the inner side surface of the outer ring and the outer side surface of the inner ring, and selecting balls with proper sizes according to the positioning holes on the retainer;
4) machining of inner end cap and outer end cap
a. Firstly, determining the sizes of an inner end cover and an outer end cover according to the sizes of clamping grooves on an inner bearing seat and an outer bearing seat, and forming the required inner end cover and outer end cover through extrusion forming to enable an end cover disc and a first positioning ring to be integrally formed, wherein the first positioning ring is positioned on the outer circumferential side surface of the end cover disc to ensure that the size of the first positioning ring is matched with the size of the clamping grooves;
b. then, corresponding shaft holes are formed along the center of the end cover disc according to the size of the transmission shaft, and second mounting holes matched with the through holes are formed along the circumference of the first positioning ring according to the positions of the through holes in the clamping grooves;
c. then uniformly installing reinforcing blocks on the inner side surface of the end cover disc, and horizontally installing limiting strips on the outer end surface of each reinforcing block;
5) maintenance-free bearing assembly
a. Firstly, clamping the processed inner ring into the corresponding two shaft shoulders along the axial direction of the transmission shaft for fixing, then sleeving the retainer outside the corresponding inner ring through the balls, and simultaneously fixedly installing the processed outer ring on the inner sides of the inner bearing seat and the outer bearing seat according to design requirements;
b. then, the inner bearing seat and the outer bearing seat are spliced, a second sealing ring is arranged in a first sealing groove on the connecting end face, and the transmission shaft assembled with the inner ring is arranged in an oil storage cavity formed by connecting the inner bearing seat and the outer bearing seat, so that the first bearing and the second bearing are connected and matched;
c. then, a first sealing ring is installed at a set position on the inner side of the end part of the outer bearing seat, mechanical sealing is conducted along one side, close to the first sealing ring, of the transmission shaft, meanwhile, the processed outer end cover is inserted into a clamping groove in the outer bearing seat, and the outer end cover and the outer bearing seat are fixedly connected through a screw penetrating through the through hole and the second installation hole;
c. finally, the inner bearing seat and the outer bearing seat are inverted, one side with the outer end cover is vertically downward, lubricating oil is injected into the oil storage cavity from the port of the inner bearing seat, after the lubricating oil reaches a set amount, the injection is stopped, the first sealing ring is installed at a set position on the inner bearing seat, one side of the transmission shaft close to the first sealing ring is mechanically sealed, the processed inner end cover is inserted into a clamping groove on the inner bearing seat, and the inner end cover and the inner bearing seat are fixedly connected by penetrating a screw through the through hole and the second mounting hole;
d. the assembled bearing is assembled on an agricultural harvester, a third sealing ring is arranged in the agricultural harvester and the second sealing groove, meanwhile, bolts penetrate through first mounting holes in the inner bearing seat and the outer bearing seat to achieve fixed connection of the maintenance-free bearing and the agricultural harvester, one side, close to the outer end cover, of the transmission shaft is connected with a hub plate of the agricultural harvester, and one side, close to the inner end cover, of the transmission shaft is connected with a power output shaft of a motor of the agricultural harvester.
CN202011196569.1A 2020-10-31 2020-10-31 Maintenance-free bearing for agricultural harvester and manufacturing method thereof Active CN112160982B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150137585A1 (en) * 2012-05-31 2015-05-21 Hino Motors, Ltd. Bearing structure
CN105317831A (en) * 2014-08-01 2016-02-10 斯凯孚公司 Hub bearing unit, in particular for agricultural machinery and mounting device
CN108730333A (en) * 2018-08-09 2018-11-02 常熟得美零部件有限公司 Non-maintaining agricultural machinery roller bearing component
CN108730334A (en) * 2018-08-09 2018-11-02 常熟得美零部件有限公司 The non-maintaining agricultural machinery hub bearing of integrated form
CN109458401A (en) * 2018-12-19 2019-03-12 常熟得美零部件有限公司 A kind of grass trimmer bearing box assembly
CN209385490U (en) * 2018-12-19 2019-09-13 常熟得美零部件有限公司 Replaceable agricultural machinery hub bearing
CN209385493U (en) * 2018-12-19 2019-09-13 常熟得美零部件有限公司 A kind of non-maintaining agricultural machinery hub bearing of integrated form
CN213511667U (en) * 2020-10-31 2021-06-22 新昌县林泉轴承有限公司 Maintenance-free bearing for agricultural harvester

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150137585A1 (en) * 2012-05-31 2015-05-21 Hino Motors, Ltd. Bearing structure
CN105317831A (en) * 2014-08-01 2016-02-10 斯凯孚公司 Hub bearing unit, in particular for agricultural machinery and mounting device
CN108730333A (en) * 2018-08-09 2018-11-02 常熟得美零部件有限公司 Non-maintaining agricultural machinery roller bearing component
CN108730334A (en) * 2018-08-09 2018-11-02 常熟得美零部件有限公司 The non-maintaining agricultural machinery hub bearing of integrated form
CN109458401A (en) * 2018-12-19 2019-03-12 常熟得美零部件有限公司 A kind of grass trimmer bearing box assembly
CN209385490U (en) * 2018-12-19 2019-09-13 常熟得美零部件有限公司 Replaceable agricultural machinery hub bearing
CN209385493U (en) * 2018-12-19 2019-09-13 常熟得美零部件有限公司 A kind of non-maintaining agricultural machinery hub bearing of integrated form
CN213511667U (en) * 2020-10-31 2021-06-22 新昌县林泉轴承有限公司 Maintenance-free bearing for agricultural harvester

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