Novel automatic tensioning wheel bearing

Abstract

The utility model discloses a novel automatic tensioning wheel bearing which comprises a bearing body, an eccentric wheel frame is arranged on the inner side of the bearing body in a penetrating mode, an installation hole is formed in the eccentric wheel frame, a shaft core is arranged in the installation hole in a penetrating mode, an annular groove is formed in one side of the eccentric wheel frame, a fixing frame is arranged on one side of the bearing body, and a protruding cover is arranged on the fixing frame. One end of the shaft core is clamped to the inner side of the convex cover, a spring is installed on one side of the eccentric wheel frame and connected between the interior of the annular groove and the inner side of the fixing frame, a shell is arranged on the outer side of the bearing body, and the bearing body comprises a bearing inner ring, a bearing outer ring, a plurality of steel balls, a retainer and a sealing ring. The plurality of steel balls are arranged between the bearing inner ring and the bearing outer ring in a sliding manner, the retainer is arranged between the bearing inner ring and the bearing outer ring, the plurality of steel balls are embedded on the retainer at equal angles, and the sealing ring is embedded between the outer side of the bearing inner ring and the outer side of the bearing outer ring. The tensioning device has the advantages of automatic adjustment of tensioning force and good sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a novel automatic tensioner bearing. Background Art

[0002] Automobile tensioner bearing is a new type of bearing developed to simulate automobile working conditions. Its working conditions require that it can operate at 100°C, with a working speed of 6000-15000r / min and a radial load of 700N. In addition, it has to undergo multiple rounds of alternating acceleration and deceleration during operation, and the speed variation range is large.

[0003] The tensioner bearing in the prior art cannot automatically adjust the tension of the tensioner bearing according to the tightness of the belt, thus reducing the stability and safety reliability of the system. At the same time, the sealing of the automatic tensioner bearing cannot be well guaranteed, so that dust and other impurities can easily enter the bearing and cause the normal operation of the bearing, and the grease inside the bearing is easy to leak. In view of the above problems, a solution is proposed below. Utility Model Content

[0004] The utility model aims to provide a novel automatic tensioner bearing, which has the advantages of automatic adjustment of tensioning force and good sealing performance.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A new type of automatic tensioner bearing comprises a bearing body, an eccentric wheel frame is passed through the inner side of the bearing body, a mounting hole is opened on the eccentric wheel frame, a shaft core is passed through the mounting hole, a ring groove is provided on one side of the eccentric wheel frame, a fixing frame is provided on one side of the bearing body, a convex cover is provided on the fixing frame, and one end of the shaft core is clamped on the inner side of the convex cover, a spring is installed on one side of the eccentric wheel frame, and the spring is connected between the ring groove and the inner side of the fixing frame, an outer shell is provided on the outer side of the bearing body, a clamping groove is provided on the outer side of the bearing outer ring, a clamping block is provided on the outer shell, and the clamping groove cooperates with the clamping block.

[0007] Preferably, the bearing body comprises: a bearing inner ring, a bearing outer ring, a plurality of steel balls, a retaining frame and a sealing ring, wherein the plurality of steel balls are slidably arranged between the bearing inner ring and the bearing outer ring, the retaining frame is arranged between the bearing inner ring and the bearing outer ring, and the plurality of steel balls are embedded in the retaining frame at equal angles, and the sealing ring is embedded between the outer sides of the bearing inner ring and the bearing outer ring.

[0008] Preferably, a connecting hole is provided on the shaft core, a through hole is provided on one side of the convex cover, and the connecting hole is connected with the through hole.

[0009] Preferably, an oil-free bearing is provided between the eccentric wheel frame and the outer side of the shaft core.

[0010] Preferably, a limiting block is provided on the lower side of the fixing frame.

[0011] The beneficial effects of the utility model are as follows: the tensioning force can be automatically adjusted according to the different tightness of the belt, so that the transmission system is stable, safe and reliable; the friction and heat generated inside the bearing can be effectively reduced by setting the sealing ring, and the dustproof sealing and grease circulation performance are improved, so that the bearing is suitable for reliable operation in an environment with high speed and a certain radial load and temperature; and the working angle of the automatic tensioner bearing can be limited by the limit block, so that its maximum working angle is 20°. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment;

[0013] Figure 2 is a cross-sectional view of an embodiment;

[0014] Figure 3 is a cross-sectional view of a bearing body in an embodiment;

[0015] Figure 4 is a schematic diagram of the structure of the housing in the embodiment;

[0016] Figure 5 is a cross-sectional view of the shaft core in the embodiment;

[0017] Figure 6 2 is a side view of the fixing frame in the embodiment.

[0018] Figure numerals: 1. bearing body; 2. eccentric wheel frame; 3. mounting hole; 4. shaft core; 5. ring groove; 6. fixing frame; 7. convex cover; 8. spring; 9. housing; 10. slot; 11. block; 12. bearing inner ring; 13. bearing outer ring; 14. steel ball; 15. retaining frame; 16. sealing ring; 17. connecting hole; 18. through hole; 19. oil-free bearing; 20. limit block. DETAILED DESCRIPTION

[0019] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0020] like Figures 1 to 6 As shown, a new type of automatic tensioner bearing includes a bearing body 1, an eccentric wheel frame 2 is provided inside the bearing body 1, a mounting hole 3 is provided on the eccentric wheel frame 2, a shaft core 4 is provided inside the mounting hole 3, a ring groove 5 is provided on one side of the eccentric wheel frame 2, a fixing frame 6 is provided on one side of the bearing body 1, a convex cover 7 is provided on the fixing frame 6, and one end of the shaft core 4 is clamped on the inner side of the convex cover 7, and an oil-free bearing 19 is also provided between the eccentric wheel frame 2 and the outer side of the shaft core 4, and the oil-free bearing 19 can increase the overall load-bearing capacity of the tensioner bearing, and increase the overall impact resistance, high temperature resistance and self-lubricating performance. A spring 8 is installed on one side of the eccentric wheel frame 2, and the spring 8 is connected between the inner side of the ring groove 5 and the fixing frame 6, and the torque of the spring 8 is 390 (+78 / -39) Ncm, so that the belt tensioning force can be automatically adjusted evenly. A shell 9 is provided on the outer side of the bearing body 1, and the shell 9 can facilitate the belt sleeve connection. A card slot is arranged on the outer side of the bearing outer ring 13, and a card block is arranged on the housing 9, and the card slot cooperates with the card block, and the card block and the card slot can make the bearing body and the housing 9 more accurately and firmly connected. Through the arrangement of the above structure, the tension can be automatically adjusted according to the different tightness of the belt, so that the transmission system is stable, safe and reliable.

[0021] The bearing body 1 includes: a bearing inner ring 12, a bearing outer ring 13, a plurality of steel balls 14, a retainer 15 and a sealing ring 16. The plurality of steel balls 14 are slidably arranged between the bearing inner ring 12 and the bearing outer ring 13. The retainer 15 is arranged between the bearing inner ring 12 and the bearing outer ring 13, and the plurality of steel balls 14 are embedded in the retainer 15 at equal angles. The sealing ring 16 is embedded between the outer sides of the bearing inner ring 12 and the bearing outer ring 13. The sealing ring 16 can increase the overall sealing performance of the bearing body 1, effectively reduce the internal friction and heat of the bearing, and improve the dustproof sealing performance and grease circulation performance, so that the bearing is suitable for reliable operation in an environment with high speed and needs to withstand certain radial loads and temperatures.

[0022] A connecting hole 17 is formed on the shaft core 4, and a through hole 18 is formed on one side of the convex cover 7. The connecting hole 17 and the through hole 18 are interconnected, so that the tensioner bearing can be connected to the external shaft components.

[0023] A limit block is provided on the lower side of the fixing frame 6, and the limit block 20 can limit the working angle of the automatic tensioner bearing to a maximum working angle of 20°.

[0024] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of automatic tensioner bearing, characterized in that: The invention comprises a bearing body (1), an eccentric wheel frame (2) is penetrated on the inner side of the bearing body (1), a mounting hole (3) is opened on the eccentric wheel frame (2), a shaft core (4) is penetrated in the mounting hole (3), a ring groove (5) is provided on one side of the eccentric wheel frame (2), a fixing frame (6) is provided on one side of the bearing body (1), a convex cover (7) is provided on the fixing frame (6), and one end of the shaft core (4) is clamped on the inner side of the convex cover (7), and a spring (6) is installed on one side of the eccentric wheel frame (2). 8), and the spring (8) is connected between the inside of the annular groove (5) and the inner side of the fixing frame (6), a housing (9) is arranged on the outer side of the bearing body (1), and the bearing body (1) comprises: a bearing inner ring (12), a bearing outer ring (13), a plurality of steel balls (14), a retaining frame (15) and a sealing ring (16), a slot (10) is arranged on the outer side of the bearing outer ring (13), a block (11) is arranged on the housing (9), and the slot (10) matches the block (11).

2. A new type of automatic tensioner bearing according to claim 1, characterized in that: A plurality of the steel balls (14) are slidably arranged between the bearing inner ring (12) and the bearing outer ring (13), the retaining frame (15) is arranged between the bearing inner ring (12) and the bearing outer ring (13), and a plurality of the steel balls (14) are embedded in the retaining frame (15) at equal angles, and the sealing ring (16) is embedded between the outer sides of the bearing inner ring (12) and the bearing outer ring (13).

3. A new type of automatic tensioner bearing according to claim 2, characterized in that: The shaft core (4) is provided with a connection hole (17), one side of the convex cover (7) is provided with a through hole (18), and the connection hole (17) and the through hole (18) are interconnected.

4. A new type of automatic tensioner bearing according to claim 3, characterized in that: An oil-free bearing (19) is also provided between the eccentric wheel frame (2) and the outer side of the shaft core (4).

5. A new type of automatic tensioner bearing according to claim 4, characterized in that: A limiting block (20) is provided on the lower side of the fixing frame (6).

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