As one of the important parts of the robot, the robot bearing plays a vital role in the product quality and performance of the robot, so how should we choose when designing the robot? What types of robot bearings are there?1. Cross roller bearingCrossed roller bearing is one of the commonly used robot bearings at present. It is a special type bearing with outer ring rotating and inner ring split. Due to the particularity of its structure, it can bear multi-directional loads such as radial load, axial load and moment load. The size of the crossed roller bearing can be miniaturized according to the requirements of the equipment, and the ultra-thin form of the bearing is even close to the limit of small size, it has high rigidity, and the precision can reach P5, P4, P2 level. It is often used in the joints and rotating parts of industrial robots, the rotating table of machining centers, hospital equipment, military industry, IC manufacturing equipment and other equipment. There are RA, RB, RU, CRBH, SX and other models.2. CRBT Micro Robot BearingThe representative CRBT type of this type of bearing is to reduce the thickness of the inner and outer rings of the RA-type crossed roller bearing to the limit, and is especially suitable for small robots with light weight and very compact structure design, such as small service robots and collaborative robots. , exoskeleton robots, radar communication, medical equipment, rotating parts of minimally invasive robots, commonly used models are CRBT105, CRBT205, CRBT305, CRBT405, CRBT505, etc.3. Thin-walled and equal-section bearingsThin-walled equal-section bearings are also called equal-section thin-walled bearings. This type of bearing has equal dimensions in the radial and axial sections and is relatively thin. Since the two cross-sectional dimensions of normal bearings are not equal, this type of bearings is classified as a separate category, collectively referred to as equal-section thin-walled bearings. Thin-walled bearings have an extremely thin bearing section, which realizes the miniaturization and weight reduction of the product, and greatly expands its application range.In order to enable the bearing to have low friction torque, high rigidity and good rotation accuracy, steel balls with small outer diameters are usually used in thin-walled bearings. The use of the hollow shaft ensures light weight and space for wiring.4. Other categoriesIn addition to cross-roller bearings and thin-walled bearings, there are other types of robot bearings such as harmonic reducer bearings, hollow rotary platform bearings, linear bearings, joint bearings, etc.

Common factors and solutions for motor bearing overheating:1. The rolling bearing is installed incorrectly, and the fit tolerance is too tight or too loose.Solution: The working performance of rolling bearings depends not only on the manufacturing accuracy of the bearing itself, but also on the dimensional accuracy, shape tolerance and surface roughness of the shaft and hole that match it, the selected fit and whether the installation is correct or not. In general horizontal motors, well-assembled rolling bearings only bear radial stress, but if the fit between the inner ring of the bearing and the shaft is too tight, or the fit between the outer ring of the bearing and the end cover is too tight, that is, when the tolerance is too large, then after assembly The bearing clearance will become too small, sometimes even close to zero. The rotation is not flexible like this, and it will generate heat during operation. If the fit between the bearing inner ring and the shaft is too loose, or the fit between the bearing outer ring and the end cover is too loose, the bearing inner ring and the shaft, or the bearing outer ring and the end cover, will rotate relative to each other, resulting in friction and heat, resulting in bearing failure. overheat. Usually, the tolerance zone of the inner diameter of the bearing inner ring as a reference part is moved below the zero line in the standard, and the tolerance zone of the same shaft and the inner ring of the bearing form a fit that is much tighter than that formed with the general reference hole .2. Inappropriate selection of lubricating grease or improper use and maintenance, poor quality or deteriorated lubricating grease, or mixed with dust and impurities can cause the bearing to heat up.Solution: Adding too much or too little grease will also cause the bearing to heat up, because when there is too much grease, there will be a lot of friction between the rotating part of the bearing and the grease, and when the grease is added too little, dryness may occur Friction and heat. Therefore, the amount of grease must be adjusted so that it is about 1/2-2/3 of the space volume of the bearing chamber. The unsuitable or deteriorated lubricating grease should be cleaned and replaced with suitable clean lubricating grease.3. The axial gap between the outer bearing cover of the motor and the outer circle of the rolling bearing is too small.Solution: Large and medium-sized motors generally use ball bearings at the non-shaft end. Roller bearings are used at the end of the shaft extension, so that when the rotor is heated and expanded, it can elongate freely. Since both ends of the small motor use ball bearings, there should be a proper gap between the outer bearing cover and the outer ring of the bearing, otherwise, the bearing may be heated due to excessive thermal elongation in the axial direction. When this phenomenon occurs, the front or rear side bearing cover should be removed a little, or a thin paper pad should be placed between the bearing cover and the end cover to form a sufficient space between the outer bearing cover at one end and the outer ring of the bearing. Clearance.4. The end covers or bearing covers on both sides of the motor are not installed properly.Solution: If the end covers or bearing covers on both sides of the motor are not installed in parallel or the seams are not tight, the balls will deviate from the track and rotate to generate heat. The end caps or bearing caps on both sides must be reinstalled flat, and evenly rotated and fixed with bolts.5. Balls, rollers, inner and outer rings, and ball racks are severely worn or metal peeling off.Solution: The bearing should be replaced at this time.6. Poor connection with load machinery. The main reasons are: poor assembly of the coupling, excessive pull of the belt, inconsistency with the axis of the load machine, too small diameter of the pulley, too far away from the bearing of the pulley, excessive axial or radial load, etc.Solution: Correct the incorrect connection to avoid abnormal force on the bearing.7. The shaft is bent.Solution: At this time, the force on the bearing is no longer pure radial force, which causes the bearing to heat up. Try to straighten the bent shaft or replace it with a new one.

2022 Top 10 Global Forklift Manufacturers1. Toyota Industries CorporationFounded in 1926, Japan's Toyota is headquartered in Aichi Prefecture, Japan. It owns TOYOTA, BT, RAYMOND, CESAB and Tailifu brands and a full range of product lines. Since Toyota acquired the famous European forklift manufacturer Sweden BT in 2000, it has been in the leading position in global sales for 19 consecutive years. It has more than 100 general agents, more than 750 dealers and 9 production bases around the world. Forklift revenue in 2019 was US$13.36 billion, a year-on-year increase of 0.5%.2. KION GroupFounded in 1904 and headquartered in Wiesbaden, Germany, the KION Group includes brands such as Linde, Still, Baoli, Fenwick and OMVoltas. In 2019, car revenue was US$7.17 billion, an increase of 8% year-on-year.3. Jungheinrich GroupJungheinrich was established in 1953, headquartered in Hamburg, Germany, and has sales and after-sales service companies in many regions around the world. Revenue in 2019 was $4.58 billion, up 5% year-over-year.4. Mitsubishi LogisnextHeadquartered in Tokyo, Japan, the company was formed by the merger of Mitsubishi Nichiyu Forklift Co., Ltd. and UniCarriers Corp. In 2019, the company's revenue was US$4.15 billion, a year-on-year decrease of 3%.5. Crown Equipment GroupFounded in 1946 and headquartered in Ohio, USA, Crown is the largest supplier of electric forklifts in North America, with a global service and distribution network of more than 500 retail locations.　　6. Hyster-Yale Material Handling EquipmentHeadquartered in Cleveland, USA, the company is the parent company of Hyster and Yale brand forklifts. Fiscal 2019 revenue was $3.29 billion, up 4% year-over-year.7. Anhui HeliAnhui Heli was founded in 1958 and is headquartered in Hefei, Anhui Province. It produces more than 1,700 product models online. Anhui Heli has established 23 provincial-level marketing networks and nearly 400 sales outlets in China, and has established overseas agency relationships in overseas regions. Its main products are sold to more than 150 countries and regions in the world. In 2019, revenue was US$1.45 billion, a year-on-year increase of 5%.8. Hangcha GroupFounded in 1956, Hangcha Group is headquartered in Hangzhou, Zhejiang. It has more than 70 holding subsidiaries and more than 300 sales outlets in China; it has 5 branches overseas and more than 230 agents. Its products are exported to Russia and Brazil. , Poland, France, Turkey, the United States and other regions. In 2019, revenue was US$1.27 billion, a year-on-year increase of 5%.9. Doosan Industrial Vehicle CompanyDoosan Industrial Vehicle Company launched Korea's first forklift in 1968, and has since developed into the largest industrial vehicle manufacturer in Korea. Revenue was $1.17 billion in 2019, up 4% year-over-year.10. Clark Material HandlingClark has manufactured the world's first forklift with a history of more than 100 years. Revenue was $780 million in 2019, slightly down from $790 million in 2018. 61236-23601-71    ROLAMENTO TORRE TOYOTA 8FG25 (119,6x40x28x23)    1333398/1333399    ROLAMENTO CARRO TORRE TRIPLEX HYSTER XM/FT YALE VX (92*35*31mm)    1363272    ROLAMENTO CARRINHO TORRE HYSTER H50CT/ H1.8TX / YALE GLP050LX/ GLP18AK    1333395/1333396    ROLAMENTO TORRE ELEVACAO HYSTER XM/FT YALE VX (111*35*31mm)    1345218/1345219    ROLAMENTO ROLDANA TORRE/MASTRO HYSTER/YALE (111.90*39.90*32.20mm)    63381-23420-71    ROLAMENTO TORRE TOYOTA 8FG20/25/30 (119,6x40x28x23mm)    0723759    ROLAMENTO TORRE/CARRO STILL RC45/CLX25/BAOLI F25G (89.8*40*28.9*23.8mm)    2801859    ROLAMENTO TORRE ELEVACAO CLARK C25L/C30L/CGP25L    94210-00700    ROLAMENTO TORRE ELEVACAO CATERPILAR/MITSUBISHI FG25(45*115*35mm)    2357723    ROLAMENTO TORRE/CARRO ELEVACAO CLARK CFY25/DPY5/CMP25L(40*114.2*28mm)    508801800    ROLAMENTO TORRE/CARRO ELEVACAO YALE 275SL/G51P/G83P/GP25RE/GP25RH( 101.22*44.57*28.32 mm)    0605285    ROLAMENTO TORRE STILL FMX 89.9*36/20*29mm    190705    ROLAMENTO LATERAL TORRE HANGCHA XR 2.0-3.8T (40*114*28)    130309KT    ROLAMENTO TORRE MAXIMAL/FELLER (45x118.5x26mm)    180705KT    ROLAMENTO LATERAL TORRE HELI/BAOLI/LONKING (25*80*22/17)    80511K2T    ROLAMENTO TORRE HUAHE (120*55*34)    180708K    ROLAMENTO TORRE HELI/BAOLI/LONKING/TCM (40X109.7X25.5/32)    760211N3T    ROLAMENTO TORRE (55*111.5*32)      

Self-aligning ball bearings have two structures: cylindrical hole and tapered hole, and the cage is made of steel plate, synthetic resin, etc. Its characteristic is that the raceway of the outer ring is spherical and has self-aligning properties, which can compensate the error caused by the self-aligning ball bearing caused by different concentricity and shaft deflection, but the relative inclination of the inner and outer rings must not exceed 3 degrees.It can withstand large radial loads, but also can withstand certain axial loads. The raceway of the outer ring of this type of bearing is spherical, so it has self-aligning performance. When the shaft is bent or tilted by force so that the relative inclination between the center line of the inner ring and the center line of the outer ring does not exceed 1° to 2.5°, the bearing can still work. .There are two types of inner bores of self-aligning ball bearings: cylindrical and conical. The taper of the conical inner hole is 1:12 or 1:30. In order to enhance the lubricating performance of the bearing, an annular oil groove and three oil holes are processed on the outer ring of the bearing.Product Features:It mainly bears radial load and can bear small axial load at the same time. The axial displacement of the shaft (housing) is limited within the clearance limit. It has self-aligning performance and allows normal operation under the condition of relatively small inclination of the inner and outer periphery. It is suitable for components whose bearing seat holes cannot strictly guarantee the coaxiality2204 20x47x182205 25x52x182206 30x62x202207 35x72x232208 40x80x232209 45x85x232210 50x90x232211 55x100x252212 60x110x282213 65x120x312214 70x125x312215 75x130x312216 80x140x332217 85x150x362218 90x160x402219 95x170x432304 20x52x212305 25x62x242306 30x72x272307 35x80x312308 40x90x332309 45x100x362310 50x110x402311 55x120x432312 60x130x462313 65x140x482314 70x150x512315 75x160x552316 80x170x582317 85x180x602318 90x190x642319 95x200x67