Slewing bearing with overload protection function

Abstract

The utility model belongs to the technical field of slewing bearings, and particularly relates to a slewing bearing with an overload protection function, which comprises a slewing bearing inner ring, a slewing bearing outer ring is arranged on the outer wall of the slewing bearing inner ring, balls are arranged between the slewing bearing inner ring and the slewing bearing outer ring, the bottom of the slewing bearing inner ring is connected with a base, and the slewing bearing outer ring is connected with the base. The rotating speed of the slewing bearing outer ring is monitored in real time through the rotating speed sensor, and when the rotating speed of the slewing bearing outer ring exceeds the bearing capacity of the slewing bearing outer ring, the friction plate is driven to ascend through the hydraulic cylinder, so that the friction plate can rub with the friction ring at the bottom of the slewing bearing outer ring; therefore, the slewing bearing outer ring is decelerated in a mode of increasing friction force, so that the slewing bearing outer ring can stably work in a normal rotating speed interval, and the condition that the slewing bearing is damaged due to overload is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of slewing bearings, and in particular relates to a slewing bearing with an overload protection function. Background Art

[0002] Slewing bearing is also called turntable bearing. Some people also call it: rotating bearing, swing bearing. Slewing bearing is widely used in real industry and is called "machine joint". It is an important transmission component required for machinery that needs to make relative rotation between two objects and bear axial force, radial force and tipping moment at the same time. With the rapid development of the machinery industry, slewing bearings have been widely used in ship equipment, engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and other industries.

[0003] At present, the existing slewing bearing usually needs to adjust the speed of the slewing bearing during use. However, when the speed of the outer ring gear of the slewing bearing exceeds its bearing capacity, it will easily cause damage, resulting in poor operating stability of the slewing bearing, and in the long run, it will also reduce the service life of the slewing bearing. Utility Model Content

[0004] The utility model aims to provide a slewing bearing with an overload protection function, aiming to solve the problem that the existing slewing bearing usually needs to adjust the rotation speed of the slewing bearing during use, but when the rotation speed of the outer ring gear of the slewing bearing exceeds its own bearing capacity, it will easily cause damage, thereby causing the stability of the slewing bearing to deteriorate during operation, and in the long run, it will also reduce the service life of the slewing bearing.

[0005] To achieve the above object, the utility model provides the following technical solution: a slewing bearing with an overload protection function, comprising a slewing bearing inner ring, the outer wall of the slewing bearing inner ring is provided with a slewing bearing outer ring, balls are provided between the slewing bearing inner ring and the slewing bearing outer ring, and the bottom of the slewing bearing inner ring is connected to a base;

[0006] A friction ring is connected to the bottom of the outer ring of the slewing bearing, two hydraulic cylinders are installed on the top of the base, friction plates are connected to the output ends of the two hydraulic cylinders, a telescopic rod is connected between the friction plate and the base, and a speed sensor is arranged on the top of the base.

[0007] As a preferred embodiment of the slewing bearing with overload protection function of the utility model, the friction plate is located directly below the friction ring.

[0008] As a preferred embodiment of the slewing bearing with overload protection function of the utility model, the two hydraulic cylinders are symmetrically distributed.

[0009] As a preferred slewing bearing with overload protection function of the utility model, the top of the base is connected to a mounting seat, the end of the mounting seat is connected to a connecting sleeve, the inner cavity of the mounting seat is provided with a spring, the end of the spring is connected to a movable block, one end of the movable block is connected to a bayonet pin, the outer wall of the movable block is connected to a shift block, the bottom of the speed sensor is connected to a connecting plate, the end of the connecting plate is connected to an insert block, and the outer wall of the insert block is provided with a slot.

[0010] As a preferred embodiment of the slewing bearing with overload protection function of the utility model, one end of the bayonet pin is inserted through the interior of the connecting sleeve.

[0011] As a preferred embodiment of the slewing bearing with overload protection function of the utility model, the insert block is adapted to the inner size of the connecting sleeve.

[0012] As a preferred embodiment of the slewing bearing with overload protection function of the utility model, the speed sensor can form an elastic snap-fit ​​structure with the base through a mounting seat, a connecting sleeve, a spring, a movable block, a latch, a shift block, a connecting plate, an insert block and a slot.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The speed sensor is used to monitor the speed of the outer ring of the slewing bearing in real time. When the speed of the outer ring of the slewing bearing exceeds its bearing capacity, the friction plate is driven up by the hydraulic cylinder so that it can rub against the friction ring at the bottom of the outer ring of the slewing bearing. The outer ring of the slewing bearing is decelerated by increasing the friction force, so that the outer ring of the slewing bearing can work stably in the normal speed range, thereby reducing the damage of the slewing bearing due to overload.

[0015] The movable block is driven to disengage the latch pin from the slot by toggling the toggle block, and then the speed sensor is pulled upward to pull the plug block at its bottom out from the inside of the connecting sleeve, thereby enabling the speed sensor to be disassembled for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main disassembled cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0020] Figure 4 It is a schematic diagram of the A enlarged structure of the utility model.

[0021] In the figure: 1. inner ring of slewing bearing; 2. outer ring of slewing bearing; 3. ball bearing; 4. base; 5. friction ring; 6. hydraulic cylinder; 7. friction plate; 8. telescopic rod; 9. speed sensor; 10. mounting seat; 11. connecting sleeve; 12. spring; 13. movable block; 14. latch; 15. shift block; 16. connecting plate; 17. plug block; 18. slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides the following technical solution: a slewing bearing with an overload protection function, comprising a slewing bearing inner ring 1, a slewing bearing outer ring 2 is arranged on the outer wall of the slewing bearing inner ring 1, a ball 3 is arranged between the slewing bearing inner ring 1 and the slewing bearing outer ring 2, and a base 4 is connected to the bottom of the slewing bearing inner ring 1;

[0024] A friction ring 5 is connected to the bottom of the slewing bearing outer ring 2, two hydraulic cylinders 6 are installed on the top of the base 4, friction plates 7 are connected to the output ends of the two hydraulic cylinders 6, a telescopic rod 8 is connected between the friction plate 7 and the base 4, and a speed sensor 9 is arranged on the top of the base 4.

[0025] Preferably, the friction plate 7 is located directly below the friction ring 5 and is symmetrically distributed between the two hydraulic cylinders 6 .

[0026] When in use, the speed sensor 9 monitors the speed of the slewing bearing outer ring 2 in real time. When the speed of the slewing bearing outer ring 2 exceeds its bearing capacity, the hydraulic cylinder 6 drives the friction plate 7 to rise so that it can rub against the friction ring 5 at the bottom of the slewing bearing outer ring 2, thereby increasing the friction force to decelerate the slewing bearing outer ring 2, so that the slewing bearing outer ring 2 can work stably in a normal speed range.

[0027] It should be noted that the telescopic rod 8 can play a guiding role when the hydraulic cylinder 6 retracts and extends the friction plate 7. The model of the speed sensor 9 is SCN-P41, and the wiring terminal of the speed sensor 9 is connected to the external display meter, so as to realize the speed display and early warning.

[0028] Preferably: a mounting seat 10 is connected to the top of the base 4, a connecting sleeve 11 is connected to the end of the mounting seat 10, a spring 12 is provided in the inner cavity of the mounting seat 10, a movable block 13 is connected to the end of the spring 12, a bayonet 14 is connected to one end of the movable block 13, a shift block 15 is connected to the outer wall of the movable block 13, a connecting plate 16 is connected to the bottom of the speed sensor 9, an insert block 17 is connected to the end of the connecting plate 16, a slot 18 is provided on the outer wall of the insert block 17, one end of the bayonet 14 is inserted through the interior of the connecting sleeve 11, the insert block 17 is adapted to the inner size of the connecting sleeve 11, and the speed sensor 9 can form an elastic snap-fit ​​structure with the base 4 through the mounting seat 10, the connecting sleeve 11, the spring 12, the movable block 13, the bayonet 14, the shift block 15, the connecting plate 16, the insert block 17, and the slot 18.

[0029] When in use, the movable block 13 is driven to drive the latch 14 to disengage from the latch slot 18 by toggling the toggle block 15, and then the speed sensor 9 is pulled upward to pull the plug block 17 at the bottom out of the inner side of the connecting sleeve 11, so that the speed sensor 9 can be disassembled;

[0030] On the contrary, during installation, the movable block 13 drives the bayonet 14 to retract by shifting the shift block 15, and then the insert block 17 at the bottom of the speed sensor 9 is inserted into the connecting sleeve 11, and then the shift block 15 is loosened so that the bayonet 14 can be inserted into the slot 18 under the action of the spring 12, so that the speed sensor 9 can be installed at the bottom of the slewing bearing outer ring 2.

[0031] Working principle: First, by shifting the shifting block 15, the movable block 13 drives the bayonet 14 to contract, and then the inserting block 17 at the bottom of the speed sensor 9 is inserted into the connecting sleeve 11, and then by loosening the shifting block 15, the bayonet 14 can be inserted into the card slot 18 under the action of the spring 12, so that the speed sensor 9 can be installed at the bottom of the slewing bearing outer ring 2, and the speed sensor 9 can monitor the speed of the slewing bearing outer ring 2 in real time. When the speed of the slewing bearing outer ring 2 exceeds its own bearing capacity, the friction plate 7 is driven to rise through the hydraulic cylinder 6. It can rub against the friction ring 5 at the bottom of the slewing bearing outer ring 2, thereby decelerating the slewing bearing outer ring 2 by increasing the friction force, so that the slewing bearing outer ring 2 can stably work in a normal speed range, thereby reducing the damage of the slewing bearing due to overload. Finally, by shifting the shift block 15, the movable block 13 drives the bayonet 14 to disengage from the slot 18, and then the speed sensor 9 is pulled upward to pull the plug block 17 at its bottom out from the inner side of the connecting sleeve 11, so that the speed sensor 9 can be disassembled for subsequent maintenance.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slewing bearing with an overload protection function, comprising a slewing bearing inner ring (1), characterized in that: The outer wall of the slewing bearing inner ring (1) is provided with a slewing bearing outer ring (2), balls (3) are provided between the slewing bearing inner ring (1) and the slewing bearing outer ring (2), and the bottom of the slewing bearing inner ring (1) is connected with a base (4); The bottom of the slewing bearing outer ring (2) is connected to a friction ring (5), the top of the base (4) is equipped with two hydraulic cylinders (6), the output ends of the two hydraulic cylinders (6) are connected to friction plates (7), a telescopic rod (8) is connected between the friction plates (7) and the base (4), and a rotation speed sensor (9) is arranged on the top of the base (4).

2. The slewing bearing with overload protection function according to claim 1, characterized in that: The friction plate (7) is located directly below the friction ring (5).

3. The slewing bearing with overload protection function according to claim 1, characterized in that: The two hydraulic cylinders (6) are symmetrically distributed.

4. The slewing bearing with overload protection function according to claim 1, characterized in that: The top of the base (4) is connected to a mounting seat (10), the end of the mounting seat (10) is connected to a connecting sleeve (11), the inner cavity of the mounting seat (10) is provided with a spring (12), the end of the spring (12) is connected to a movable block (13), one end of the movable block (13) is connected to a latch pin (14), the outer wall of the movable block (13) is connected to a shifting block (15), the bottom of the speed sensor (9) is connected to a connecting plate (16), the end of the connecting plate (16) is connected to an inserting block (17), and the outer wall of the inserting block (17) is provided with a latching groove (18).

5. The slewing bearing with overload protection function according to claim 4, characterized in that: One end of the bayonet pin (14) is inserted through the interior of the connecting sleeve (11).

6. The slewing bearing with overload protection function according to claim 4, characterized in that: The insert block (17) is adapted to the inner size of the connecting sleeve (11).

7. The slewing bearing with overload protection function according to claim 4, characterized in that: The rotation speed sensor (9) can form an elastic locking structure with the base (4) through a mounting seat (10), a connecting sleeve (11), a spring (12), a movable block (13), a latch pin (14), a shifting block (15), a connecting plate (16), an inserting block (17), and a slot (18).

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