School bus safety enters campus Ankai bus again to take "public welfare model"


The safety of school buses has always been a hot issue of concern to the whole society. Ankai Bus, one of the standard-setting operators of the school bus industry, has also continued to pay attention to the development of school buses. On the morning of March 17th, Ankai Bus Co., Ltd. was jointly organized by Chaohu Physical Education Bureau, Chaoyang Automobile Co., Ltd., Anhui Chaoyun Group, Chaohu City Safety Supervision Bureau, Public Security Bureau, and Transportation Bureau. The launch ceremony for safe entry to campus was kicked off at the Central Elementary School in Huangbu Town, Chaohu City.


On the site of the event, a safety emergency evacuation drill for school buses that was jointly attended by the organizers and the teachers and students of the school attracted everyone's attention. In addition, Ankai professionals also brought the safety of the school bus to the lecture hall and shared the school bus ride with the students. Safety knowledge allows children to have a meaningful safety education class.

Bring safety knowledge into the classroom
——Ankai bus again takes on the “Public Welfare Model”

Education is the foundation. Students are the nation’s tomorrow and they are the hope of the nation. The responsibility for school buses is high and their responsibilities are significant. Whether it is the government, schools or school bus manufacturing companies and operating companies, they have paid special attention to the safety of school buses. At the same time, as a mainstream bus manufacturer, Ankai has been committed to bring safer, more comfortable and environmentally friendly products to the society, to create a safer school bus, and to protect the children's healthy growth.


On the site of the event, Chabagh, general manager of Ankai Bus, stated: “The goal of creating better products and creating a better society is Ankai’s corporate vision. In 2017, the company will carry out the “School Bus Commonwealth” initiative with greater intensity. After the launch of this event, Ankai will work harder to carry out school bus public welfare related work and bring warmth and safety to more children nationwide."



In addition to the safety emergency evacuation drill for school buses, Ankai Bus also entered the classroom, bringing the “school bus safety auditorium” to the children. It taught the children the safety of school bus rides and raised the safety awareness of the children's school buses. .

As an activist in the field of school bus safety, the “Public Welfare Model” Ankai Bus has taken on another important task, guarding the children's future with a sincere action and social responsibility.

Focus on school bus safety
- Build "safeguards" with the highest standards

Ankai is committed to fulfilling its corporate social responsibility and actively giving back to the society. In 2016, Ankai Bus launched the “School Bus Charity Action” Ankai Passenger Car Safety Book Bag Love Action, which donated nearly 100,000 yuan for the rural left-behind children's school supplies. He went to Henan, Hunan, Hubei, Anhui and other places to conduct on-site visits and issued safe schoolbags for local left-behind children.


Ankai Bus is one of the national school bus standard-setting enterprises and is the first batch of enterprises with the qualification to produce school buses approved by the State. Ankai School Bus integrates all the core advantages. The school bus has passed performance tests such as dynamics, economics, and braking, and has completed a 6,000-kilometer reliability test to ensure the safety and reliability of the vehicle. The entire vehicle has been upgraded to 98 items and obtained 16 authorized patents. Has six core values: three-dimensional security, stability, reliability, exquisite appearance, convenient driving, comfortable ride, both inside and outside the repair.



At present, Ankai school bus has covered a full range of lengths of 5.5-11 meters. Among them, Ankai's third-generation school bus products, which represent the highest level of school bus manufacturing in China, have been put on the market and have received enthusiastic response. Today, Ankai's school bus products have covered all provinces and cities across the country, bringing comfortable and safe commuting guarantees to children everywhere.

Promote industrial development
—— Ankai School Bus Practices “Social Responsibility”

Established a music classroom for impoverished elementary schools in Anhui and established multimedia classrooms for the Yingxiu Middle School after the earthquake... For the love of public welfare students, Ankai bus has continued for many years, which has effectively promoted the development of education.


In the field of school bus safety, Ankai Bus is both a caller and a pioneer. At the scene of the event, every child's smile comes from Ankai's appeal and practice of school bus safety.

As early as 2012, Ankai Bus organized the “Large Public Welfare Activities on Campus” to take the lead in caring for schoolchildren's safety and growth. In 2014, Ankai Bus China also organized an Anke Bus as the theme of “Concern for the school bus business” to discuss the future of school bus safety and industrial development in China. In July 2015, Ankai Bus Car Safety was upgraded again. It was the first to publish the industry's first Bus Safety Development Proposal, calling for the entire industry to pay attention to the safety of schoolchildren and use the most stringent standards to create “safeguards” around schoolchildren!





Angular contact Ball Bearings

 

Angular Contact Ball Bearing has high limit rotational speed, they can carry radial load and axial load simultaneously, they can also withstand purely radial load. The axial load carrying capacity depends on the magnitude of contact angle and increases with increasing contact angle.

Structures

1. Non-separable angular contact ball bearings

This inner ring and outer ring of this type of bearings cannot be separated and comprises following structures:

Contact angle α=15°      counter bore on outer ring,7000Ctype

Contact angle α=25°      counter bore on outer ring,7000ACtype

Contact angle α=40°      counter bore on outer ring, 7000B type

2. Four-point contact ball bearings

This type of bearings is separable bearings. Whereof, QJ0000 type has two-piece inner ring and QJF0000 type has two-piece outer ring. Their contact angles are same as 35°.When received no load or pure radial load, the steel balls of the Ball Bearing contact with the four points of the rings. When it is received a pure axial load, the steel balls perform a two-point contact with the ring. In addition, besides the axial load from both directions, this kind of bearing can take torque-load as well.

3. Double row angular contact ball bearings

This kind of bearings can accommodate radial loads as well as axial loads acting in both directions; they can also take loading moment. They can restrain the axial displacement from both directions of the shaft or housing; the contact angle is 30° (or 40°)

Permissible tilt angle

There is only a little inclination between the inner ring and outer ring of angular contact bearings, the permissible tilt angle varies according to the internal clearance when the bearings are operating, the bearing dimensions, internal design, force and loading moment received by the bearings. The value of the maximum permissible tilt angle should be able to ensure that no much extra stress to be generated inside the bearings.

The tilt angle existing between the inner ring and outer ring will influence the bearing service life. Meanwhile, the running accuracy is decreased down and noise increased.

Tolerance and clearance

The tolerances of general angular contact bearings are class normal P0, class P5 and P6. Class P4 and P2 are applicable to machine tool spindles and bearing amount in pairs.

Clearance of single row angular contact bearing is decided by the contact angle, which is guaranteed by manufacturing.

Axial clearance of Four-point contact ball bearings is listed in table 1.

Cage material

Generally, the cage of angular contact bearing is pressed cage of steel sheet or brass cage, and it is solid brass cage for two row angular contact bearing.

Dynamic equivalent radial load

Single-row angular contact ball bearings with a contact angle of 15°

Single bearing or bearing in pairs(7000 C.7000 C/DT)

Fa/Fr≤e         Pr=Fr 

Fa/Fr>e          Pr=0.44Fr+YFa

Back-to-back and face to face arrangements(7000 C/DB.7000 C/DF)

Fa/Fr≤e         Pr=Fr+Y1Fa       

Fa/Fr>e          Pr=0.72Fr+Y2Fa    

Single-row angler contact ball bearings with a contact angle of 25°

Single bearing or bearing in pairs(7000 AC.7000 AC/DT)

Fa/Fr≤0.68      Pr=Fr             

Fa/Fr>0.68       Pr=0.41Fr+0.87Fa   

Back-to-back and face to face arrangements(7000 AC/DB.7000 AC/DF)

Fa/Fr≤0.68      Pr=Fr+0.92Fa       

Fa/Fr>0.68       Pr=0.67Fr+1.41Fa    

Single-row angular contact ball bearings with a contact angle of 40°

Single bearing or bearing in pairs (7000 B.7000 B/DT)

Fa/Fr≤1.14      Pr=Fr             

Fa/Fr>1.14       Pr=0.35Fr+0.57Fa   

Back-to-back and face to face arrangements(7000 B/DB.7000 B/DF)

Fa/Fr≤1.14      Pr=Fr+0.55Fa      

Fa/Fr>1.14       Pr=0.57Fr+0.93Fa   

Four point contact ball bearings with a contact angle of 35°

Fa/Fr≤0.95      Pr=Fr+0.66Fa      

Fa/Fr>0.95       Pr=0.6Fr+1.07Fa    

Double-row angular contact ball bearings with a contact angle of 45°

Fa/Fr≤1.34      Pr=Fr+0.47Fa      

Fa/Fr>1.34       Pr=0.54Fr+0.81Fa   

Static equivalent radial load

Single-row angular contact ball bearings with a contact angle of 15°

For single bearing or bearing in pairs(7000 C.7000 C/DT)

 

P0r=0.5Fr+0.46Fa   

P0r<Fr  P0r=Fr

For back-to-back and face-to-face arrangements (7000 C/DB.7000 C/DF)

P0r=Fr+0.92Fa

Single-row angular contact ball bearings with contact angle of 25°

For single bearing or bearing in pairs (7000 AC.7000 AC/DT)

P0r=0.5Fr+0.38Fa  

when P0r<Fr  let P0r=Fr

For two bearings in back-to-back and face-to-face arrangements

P0r=Fr+0.76Fa

Single-row angular contact ball bearings with contact angle of 40°

For single bearing or bearing in pairs

P0r=0.5Fr+0.26Fa   

when P0r<Fr  let P0r=Fr

For two bearings in back-to-back and face-to-face arrangements

P0r=Fr+0.52Fa

Four point contact ball bearings

P0r=Fr+0.58Fa

Double-row angular contact ball bearings with contact angle of 45°

P0r=Fr+0.44Fa

Fr  Actual radial load of the bearing.

Fa   Axial load of the bearing

The values of e .Y .Y1 .Y2  see Table 2.

Table 1   Axial internal clearance of four point contact ball bearings

                                        μm

Nominal bore diameter  d

mm

C2 clearance

Standard clearance

C3

clearance

C4

clearance

Over

To

Min

Max

Min

Max

Over

To

Min

Max

10

18

40

 

60

80

100

 

140

180

220

 

260

18

40

60

 

80

100

140

 

180

200

260

 

300

15

26

36

 

46

56

66

 

76

96

115

 

135

55

66

86

 

96

116

136

 

156

176

195

 

215

45

56

76

 

86

96

116

 

136

156

175

 

195

85

106

126

 

136

156

176

 

196

216

235

 

275

75

96

116

 

126

135

156

 

176

196

215

 

255

115

146

166

 

176

196

216

 

236

256

295

 

335

105

136

156

 

166

176

196

 

216

236

275

 

295

145

186

206

 

216

236

256

 

276

296

335

 

355

 

Table 2   Calculate Coefficient

                           Î¼m

e

Y

Y1

Y2

0.172

0.345

0.689

1.03

1.38

2.07

3.45

5.17

6.89

0.38

0.4

0.43

0.46

0.47

0.5

0.55

0.56

0.56

1.47

1.4

1.3

1.23

1.19

1.12

1.02

1

1

1.65

1.57

1.46

1.38

1.34

1.26

1.14

1.12

1.12

2.39

2.28

2.11

2

1.93

1.82

1.66

1.63

1.63

Dw is the diameter of the rolling element

Angular Contact Ball Bearing

Machined Cage Angular Contact Ball Bearing,Pressed Cage Angular Contact Ball Bearing,One Row Angular Contact Ball Bearing,Two Row Angular Contact Ball Bearing

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