Slewing bearing for towing trailer

Abstract

The slewing bearing comprises an outer ring, an inner ring and a rolling body, the outer ring comprises an outer main body part and an outer mounting part connected with the outer main body part, the outer main body part is axially provided with a mounting groove, the inner ring is mounted in the mounting groove, the top surface of the inner ring is arranged in the mounting groove, and the rolling body is arranged in the mounting groove. The bottom surface of the inner ring penetrates through the mounting groove and extends out of the bottom surface of the outer main body part, an outer groove is formed in the inner side of the outer main body part, an inner groove is formed in the outer side of the inner ring, a channel is formed between the outer groove and the inner groove, and the rolling body is arranged in the channel in a rolling mode. An R4 chamfer is arranged at the joint of the outer main body part and the outer mounting part; the axial gap between the outer ring and the inner ring and the radial gap between the outer ring and the inner ring are both 0.10-0.20 mm. The slewing bearing for the traction trailer is high in manufacturing precision, and the operation flexibility of the slewing bearing for the traction trailer is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a slewing bearing for a traction trailer. Background Art

[0002] A tractor trailer is a traction vehicle used for transporting containers in factories, logistics, and ports. The traction frame reduces the impact force when the vehicle starts and stops, effectively protecting the safety of the vehicle. The height of the traction frame can be adjusted according to the tractor models of different manufacturers. The front suspension is steering, the rear suspension is directional, the rear suspension is double suspension, and the high-strength buffer spring can still be used as flat ground during transportation even if the road surface is uneven. It has the advantages of simple structure, convenient application, convenient maintenance, large load-bearing capacity, and long service life. It is widely used in many industries such as machinery, metallurgy, warehousing and transportation. With the tractor, the flat plate has a pivotal position in various fields. The main technical problems of the existing slewing bearing for tractor trailers are: poor manufacturing accuracy, inconvenient installation and fixation of the outer ring and the inner ring, insufficient mechanical strength of the outer ring, insufficient ability to withstand axial force and overturning moment, and large errors in the axial clearance between the outer ring and the inner ring and the radial clearance between the outer ring and the inner ring, which affect the flexibility of the slewing bearing operation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a slewing bearing for a traction trailer, which has an outer ring and an inner ring that are easy to install and fix, a high outer ring structure strength, high rotation flexibility, and a large ability to withstand axial force and overturning moment, in view of the deficiencies in the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a slewing bearing for a tractor trailer, comprising an outer ring, an inner ring and a rolling element, the outer ring comprising an outer main body and an outer mounting portion connected to the outer main body, the outer main body is axially provided with a mounting groove, the inner ring is installed in the mounting groove, the upper part of the inner ring is placed in the mounting groove, the lower part of the inner ring passes through the mounting groove and extends out of the bottom surface of the outer main body, the inner side of the outer main body is provided with an outer groove, the outer side of the inner ring is provided with an inner groove, a channel is formed between the outer groove and the inner groove, the rolling element is rollingly arranged in the channel, and an R4 chamfer is provided at the connection between the outer main body and the outer mounting portion; the axial clearance between the outer ring and the inner ring and the radial clearance between the outer ring and the inner ring are both 0.10-0.20 mm.

[0005] As a preferred solution, the inner ring includes an inner main body and an inner mounting portion connected to the inner main body, the inner groove is arranged on the outer side of the inner main body, and an R4 chamfer is arranged at the connection between the inner mounting portion and the inner main body.

[0006] As a preferred solution, the slewing bearing for the traction trailer further includes an upper sealing ring, an upper sealing groove is provided on the inner side of the outer main body, the upper sealing ring is arranged in the upper sealing groove, and the bottom surface of the upper sealing ring abuts against the top surface of the inner ring.

[0007] As a preferred solution, the slewing bearing for tractor further includes a lower sealing ring, a lower sealing groove is provided on the outer side of the inner main body, the lower sealing ring is arranged in the lower sealing groove, and the top surface of the lower sealing ring abuts against the bottom surface of the outer ring.

[0008] As a preferred solution, the outer mounting portion is provided with outer mounting holes at intervals along its circumference, and the angle between two adjacent outer mounting holes is 22.5°.

[0009] As a preferred solution, the outer side of the outer main body is evenly provided with oil holes along its circumference, the oil holes are connected with the channel, and the angle between two adjacent oil holes is 90°.

[0010] As a preferred solution, a through hole is radially arranged on the outer main body portion for the rolling body to enter the channel, and an insert having a shape matching the through hole is arranged in the through hole.

[0011] As a preferred solution, the inner mounting portion is provided with inner mounting holes at intervals along its circumference, and the angle between two adjacent mounting holes is 18°.

[0012] The beneficial effects of the utility model are as follows: the outer ring of the utility model is provided with an outer mounting portion protruding outward, and the lower part of the inner ring passes through the mounting groove and extends out of the bottom surface of the outer main body, which can facilitate the installation and fixation of the outer ring and the inner ring; the connection between the outer main body and the outer mounting portion of the utility model is provided with an R4 chamfer, which can enhance the mechanical strength of the outer ring and effectively improve the service life of the outer ring. The axial clearance between the outer ring and the inner ring and the radial clearance between the outer ring and the inner ring are both 0.10 to 0.20 mm, so that the manufacturing precision of the slewing bearing for the traction trailer is high, which effectively improves the operational flexibility of the slewing bearing for the traction trailer. The utility model uses the four-point contact motion of the rolling ball (steel ball) to facilitate the bearing of occasions with large axial force and overturning moment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of a slewing bearing for a towing trailer in one embodiment of the utility model;

[0014] Figure 2 for Figure 1 Cross-sectional view of the AA section;

[0015] Figure 3 for Figure 1 Cross-sectional view of the middle BB part;

[0016] Figure 4 for Figure 1 Cross-sectional view of the CC section.

[0017] In the figure:

[0018] 100- slewing bearing for tractor trailer;

[0019] 10-outer ring, 11-outer main body, 12-outer mounting portion, 13-outer mounting hole, 14-outer groove, 15-R4 chamfer;

[0020] 20-inner ring, 21-inner main body, 22-inner mounting portion, 23-inner mounting hole, 24-inner groove, 25-R4 chamfer;

[0021] 30- rolling element,

[0022] 40-upper sealing ring;

[0023] 50-lower sealing ring;

[0024] 60-Oil nozzle;

[0025] 70-Inlay. DETAILED DESCRIPTION

[0026] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 4 As shown, a slewing bearing 100 for a tractor trailer includes an outer ring 10, an inner ring 20 and a rolling element 30. The outer ring 10 includes an outer main body 11 and an outer mounting portion 12 connected to the outer main body 11. The outer main body 11 is axially provided with a mounting groove, and the inner ring 20 is installed in the mounting groove. The connection between the outer main body 11 and the outer mounting portion 12 is provided with an R4 chamfer 15, which can enhance the mechanical strength of the outer ring 10 and effectively improve the service life of the outer ring 10. The inner side of the outer main body 11 is provided with an outer groove 14.

[0028] like Figures 1 to 4 As shown, the inner ring 20 includes an inner main body 21 and an inner mounting portion 22 connected to the inner main body, the upper portion of the inner main body 21 is placed in the mounting groove, and the lower portion of the inner main body 21 passes through the mounting groove and extends out of the bottom surface of the outer main body 11. An R4 chamfer 25 is provided at the connection between the inner mounting portion 22 and the inner main body 21, which can enhance the mechanical strength of the inner ring 20 and effectively improve the service life of the inner ring 20. An inner groove 24 is provided on the outer side of the inner main body 21, and a channel is formed between the outer groove 14 and the inner groove 24, and the rolling body 30 is rollingly arranged in the channel.

[0029] As a preferred solution, the axial clearance between the outer ring 10 and the inner ring 20 and the radial clearance between the outer ring 10 and the inner ring 20 are both 0.10-0.20 mm, so that the manufacturing precision of the slewing bearing 100 for the tractor trailer is high, and the operating flexibility of the slewing bearing 100 for the tractor trailer is effectively improved.

[0030] As a preferred solution, the material of the outer ring 10 and the inner ring 20 is 50Mn, and the hardness of the outer ring 10 and the inner ring 20 is 220-269HB. This effectively improves the mechanical strength of the slewing bearing 100 for traction trailers, effectively improves the bearing capacity of the slewing bearing 100 for traction trailers, and effectively extends the service life of the slewing bearing 100 for traction trailers; at the same time, it can effectively improve the corrosion resistance of the slewing bearing 100 for traction trailers, thereby facilitating user maintenance.

[0031] As a preferred solution, the slewing bearing 100 for traction trailer further includes an upper sealing ring 40 and a lower sealing ring 50. An upper sealing groove is provided on the inner side of the outer main body 11. The upper sealing ring 40 is arranged in the upper sealing groove. The bottom surface of the upper sealing ring 40 abuts against the top surface of the inner ring 20. A lower sealing groove is provided on the outer side of the inner main body 21. The lower sealing ring 50 is arranged in the lower sealing groove. The top surface of the lower sealing ring 50 abuts against the bottom surface of the outer ring 10. This effectively improves the sealing performance and effectively avoids the phenomenon of blockage of the slewing bearing 100 for traction trailer caused by external dirt entering the interior of the slewing bearing 100 for traction trailer, thereby extending the service life of the slewing bearing 100 for traction trailer.

[0032] As a preferred solution, the upper sealing ring 40 and the lower sealing ring 50 are both sealing strips of model W17A, which have stronger sealing performance.

[0033] As a preferred solution, the outer mounting portion 12 is provided with outer mounting holes 13 at intervals along its circumference, and the angle between two adjacent outer mounting holes 13 is 22.5°.

[0034] As a preferred solution, the outer side of the outer main body 11 is evenly provided with oil holes along its circumference, the oil holes are connected to the channel, the angle between two adjacent oil holes is 90°, and each oil hole is provided with an oil nozzle 60.

[0035] As a preferred solution, a through hole is provided in the radial direction of the outer main body portion 11 for the rolling body 30 to enter the channel, and an insert 70 having a shape matching the through hole is provided in the through hole.

[0036] As a preferred solution, the inner mounting portion 22 is provided with inner mounting holes 23 at intervals along its circumference, and the angle between two adjacent mounting holes is 18°.

[0037] The beneficial effects of the utility model are as follows: the outer ring of the utility model is provided with an outer mounting portion protruding outward, and the lower part of the inner ring passes through the mounting groove and extends out of the bottom surface of the outer main body, which can facilitate the installation and fixation of the outer ring and the inner ring; the connection between the outer main body 11 and the outer mounting portion 12 of the utility model is provided with an R4 chamfer 15, which can enhance the mechanical strength of the outer ring 10 and effectively improve the service life of the outer ring 10. The axial clearance between the outer ring 10 and the inner ring 20 and the radial clearance between the outer ring 10 and the inner ring 20 are both 0.10-0.20 mm, so that the manufacturing precision of the slewing bearing 100 for traction trailer is high, and the operation flexibility of the slewing bearing 100 for traction trailer is effectively improved.

[0038] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A slewing bearing for a tractor trailer, characterized in that: It comprises an outer ring, an inner ring and a rolling body, wherein the outer ring comprises an outer main body and an outer mounting part connected to the outer main body, the outer main body is axially provided with a mounting groove, the inner ring is mounted in the mounting groove, the upper part of the inner ring is placed in the mounting groove, the lower part of the inner ring passes through the mounting groove and extends out of the bottom surface of the outer main body, an outer groove is provided on the inner side of the outer main body, an inner groove is provided on the outer side of the inner ring, a channel is formed between the outer groove and the inner groove, the rolling body is rollingly arranged in the channel, and an R4 chamfer is provided at the connection between the outer main body and the outer mounting part; the axial clearance between the outer ring and the inner ring and the radial clearance between the outer ring and the inner ring are both 0.10-0.20 mm.

2. The slewing bearing for a tractor trailer according to claim 1, characterized in that: The inner ring includes an inner main body and an inner mounting portion connected to the inner main body, the inner groove is arranged on the outer side of the inner main body, and an R4 chamfer is arranged at the connection between the inner mounting portion and the inner main body.

3. The slewing bearing for a tractor trailer according to claim 2, characterized in that: It also includes an upper sealing ring. An upper sealing groove is provided on the inner side of the outer main body. The upper sealing ring is arranged in the upper sealing groove. The bottom surface of the upper sealing ring abuts against the top surface of the inner ring.

4. The slewing bearing for a tractor trailer according to claim 3, characterized in that: It also includes a lower sealing ring. A lower sealing groove is arranged on the outer side of the inner main body. The lower sealing ring is arranged in the lower sealing groove. The top surface of the lower sealing ring abuts against the bottom surface of the outer ring.

5. The slewing bearing for a tractor trailer according to claim 1, characterized in that: The outer mounting portion is provided with outer mounting holes at intervals along its circumference, and the angle between two adjacent outer mounting holes is 22.5°.

6. The slewing bearing for a tractor trailer according to claim 1, characterized in that: The outer side of the outer main body is evenly provided with oil holes along its circumference, the oil holes are connected with the channel, and the angle between two adjacent oil holes is 90°.

7. The slewing bearing for a tractor trailer according to claim 1, characterized in that: The outer main body is radially provided with a through hole for the rolling body to enter the channel, and the through hole is provided with an insert having a shape matching the through hole.

8. The slewing bearing for a tractor trailer according to claim 2, characterized in that: The inner mounting portion is provided with inner mounting holes at intervals along its circumference, and the angle between two adjacent mounting holes is 18°.

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