High-durability timing tensioner

Abstract

The utility model discloses a high-durability timing tensioner which comprises a shaft core, an eccentric aluminum piece is rotationally connected outside the shaft core, a belt pulley is arranged outside the eccentric aluminum piece, a bearing table is further arranged outside the shaft core, and the bearing table abuts against the upper side of the eccentric aluminum piece. A first step layer and a second step layer which extend outwards are arranged on the upper edge of the shaft core curved surface, and the first step layer and the bearing table are separated through a belleville spring; a connecting plate is further arranged outside the shaft core, and the connecting plate is located on the upper side of the belleville spring and attached to the second step layer. A bearing table is arranged outside the shaft core, a fixing plate is further arranged outside the shaft core, and the fixing plate is located on the lower side of the eccentric aluminum piece. The bearing table is designed to clamp and install a belleville spring, the number of parts of the bearing table is reduced, and the assembly time is shortened; the bearing table is provided with the positioning ring plate and the weight reduction groove, so that the structural reliability is improved, and the weight of the bearing table is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tension wheels, in particular to a high-durability timing tensioner. Background Art

[0002] The existing tensioner usually uses the axial force of the coil spring to maintain the loading height of the tensioner. After long-term use, the axial force of the tensioner with a single spring design is easily attenuated, causing the height of the pulley to decrease, resulting in belt wear.

[0003] In order to solve the above problems, a high-stability tensioner is disclosed in application No. 202322791243.9, in which a butterfly spring is additionally arranged to maintain the loading height of the tensioner. However, the butterfly spring is clamped by arranging washers and T-shaped spring sleeves in the device. Compared with traditional tensioners, the device has too many internal parts and is more complicated to assemble. In addition, the separation of the T-shaped spring sleeve and the washer reduces the structural strength, and wear is prone to occur between the T-shaped spring sleeve and the washer, so improvement is needed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a high-durability timing tensioner to solve the problems mentioned in the above background technology.

[0005] The utility model provides the following technical solutions: a high-durability timing tensioner, comprising a shaft core, an eccentric aluminum part is rotatably connected to the shaft core, a pulley is arranged outside the eccentric aluminum part, a bearing platform is also arranged outside the shaft core, the bearing platform is against the upper side of the eccentric aluminum part, a first step layer and a second step layer extending outward are arranged at the upper edge of the shaft core curved surface, and the first step layer is separated from the bearing platform by a butterfly spring;

[0006] A connecting plate is also provided outside the shaft core, and the connecting plate is located on the upper side of the butterfly spring and attached to the second step layer;

[0007] A fixing plate is riveted to the outside of the shaft core, the fixing plate is located at the lower side of the eccentric aluminum part, and a mounting foot is provided on the lower side of the fixing plate, and a wear-reducing plate is provided between the eccentric aluminum part and the fixing plate;

[0008] A compression spring is arranged between the connecting plate and the eccentric aluminum part, and the compression spring is located outside the bearing platform.

[0009] Preferably, a positioning ring plate is provided on the upper side of the bearing platform, the butterfly spring is located inside the positioning ring plate, and the inner diameter of the positioning ring plate is larger than the outer diameter of the butterfly spring.

[0010] Preferably, a plurality of weight-reducing grooves are provided at equal distances in the outer curved surface of the positioning ring plate, and a curved plate extending downward into the weight-reducing grooves is integrally formed in the curved surface of the connecting plate;

[0011] A plurality of convex columns are arranged at equal angles on the outer curved surface of the positioning ring plate, and a through groove penetrating from top to bottom to accommodate the convex columns is arranged in the connecting plate.

[0012] Preferably, a self-lubricating bearing is provided between the shaft core and the eccentric aluminum part.

[0013] Preferably, a locking column is provided at the lower edge of the outer curved surface of the shaft core, and a slot for accommodating the locking column is provided in the fixing plate.

[0014] Preferably, a straight portion without curvature is provided in the curved surface of the locking column, and the locking groove is adapted to the shape of the locking column.

[0015] Preferably, two mounting feet are provided.

[0016] Preferably, the wear reducing plate is provided with no less than two positioning posts, and the lower side surface of the eccentric aluminum part is provided with a positioning groove for accommodating the positioning posts.

[0017] The utility model provides a high-durability timing tensioner, which has the following beneficial effects:

[0018] The utility model adopts a design of a bearing platform to clamp and install the butterfly spring, thereby reducing the number of parts of the utility model and reducing the assembly time;

[0019] By arranging the positioning ring plate and the weight-reducing groove on the bearing platform, not only the structural reliability is increased, but also the weight of the utility model is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of each part in the utility model;

[0021] Figure 2 yes Figure 1 An enlarged schematic diagram of the center axis core;

[0022] Figure 3 yes Figure 1 An enlarged schematic diagram of the middle load platform;

[0023] Figure 4 yes Figure 1 Schematic diagram of the appearance of the middle connecting plate from another perspective;

[0024] Figure 5 It is a schematic diagram of the appearance of the utility model after assembly.

[0025] In the figure:

[0026] 11. Shaft core; 12. Pulley; 13. Carrying platform; 14. Step layer No. 1; 15. Butterfly spring; 16. Fixed plate; 17. Positioning ring plate; 18. Weight reduction groove; 19. Locking column; 20. Wear reduction plate; 20. Wear reduction plate; 21. Mounting foot; 22. Self-lubricating bearing; 23. Positioning column; 24. Compression spring; 31. Step layer No. 2; 32. Bending plate; 33. Boss; 43. Connecting plate; 44. Eccentric aluminum part. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Reference Figure 1-Figure 5According to an embodiment of a high-durability timing tensioner of the utility model, it includes a shaft core 11, an eccentric aluminum part 44 is rotatably connected to the outside of the shaft core 11, a pulley 12 is arranged outside the eccentric aluminum part 44, a bearing platform 13 is also arranged outside the shaft core 11, the bearing platform 13 is against the upper side of the eccentric aluminum part 44, and a first step layer 14 and a second step layer 31 extending outward are arranged at the upper edge of the curved surface of the shaft core 11, and the first step layer 14 and the bearing platform 13 are separated by a butterfly spring 15. In this embodiment, in order to reduce the space occupied by the butterfly spring 15 and to facilitate the positioning of the butterfly spring 15, a positioning ring plate 17 is arranged on the upper side of the bearing platform 13, the butterfly spring 15 is located on the inner side of the positioning ring plate 17, and the inner diameter of the positioning ring plate 17 is larger than the outer diameter of the butterfly spring 15.

[0032] A connecting plate 43 is also provided outside the shaft core 11. The connecting plate 43 can move axially. The connecting plate 43 is located on the upper side of the butterfly spring 15 and is attached to the second step layer 31. That is, the setting of the second step layer 31 can prevent the connecting plate 43 from detaching from the outside of the shaft core 11. A compression spring 24 is provided between the connecting plate 43 and the eccentric aluminum part 44. The compression spring 24 is located outside the supporting platform 13.

[0033] A fixing plate 16 is riveted to the outside of the shaft core 11, and the fixing plate 16 is located on the lower side of the eccentric aluminum part 44, and a mounting foot 21 is provided on the lower side of the fixing plate 16, and two mounting feet 21 are provided. A wear-reducing plate 20 is provided between the eccentric aluminum part 44 and the fixing plate 16, and a hexagonal groove is also provided in the fixing plate 16. The staff can insert a wrench into the hexagonal groove and drive the shaft core 11 to rotate, thereby causing the eccentric aluminum part 44 and the shaft core 11 to rotate, and causing the pulley 12 to be eccentric, thereby tightening the belt located outside it. The specific principle of using the tensioning wheel is the existing technology and will not be repeated here.

[0034] In order to facilitate the riveting of the fixing plate 16, a locking column 19 is provided at the lower edge of the outer curved surface of the shaft core 11, and a slot for accommodating the locking column 19 is provided in the fixing plate 16. A straight portion without curvature is provided in the curved surface of the locking column 19, and the slot is adapted to the shape of the locking column 19.

[0035] In addition, in order to reduce the weight of the high-durability timing tensioner and avoid relative sliding between the positioning ring plate 17 and the connecting plate 43, a plurality of weight-reducing grooves 18 are provided at equal distances in the outer curved surface of the positioning ring plate 17, and a curved plate 32 extending downward to the weight-reducing groove 18 is integrally formed in the curved surface of the connecting plate 43;

[0036] In addition, a plurality of bosses 33 are arranged at equal angles on the outer curved surface of the positioning ring plate 17 , and a through groove penetrating from top to bottom to accommodate the bosses 33 is arranged in the connecting plate 43 .

[0037] The shaft core 11 and the eccentric aluminum part 44 are connected via a self-lubricating bearing 22 to reduce wear.

[0038] In order to prevent the wear reducing plate 20 from rotating relative to the eccentric aluminum part 44 , the wear reducing plate 20 is provided with at least two positioning posts 23 , and the lower side of the eccentric aluminum part 44 is provided with positioning grooves for accommodating the positioning posts 23 .

[0039] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A high-durability timing tensioner, comprising a shaft core (11), characterized in that: The shaft core (11) is rotatably connected to an eccentric aluminum part (44), a pulley (12) is arranged outside the eccentric aluminum part (44), a bearing platform (13) is also arranged outside the shaft core (11), the bearing platform (13) is against the upper side of the eccentric aluminum part (44), and a first step layer (14) and a second step layer (31) extending outward are arranged at the upper edge of the curved surface of the shaft core (11), and the first step layer (14) and the bearing platform (13) are separated by a butterfly spring (15); A connecting plate (43) is further provided outside the shaft core (11), and the connecting plate (43) is located on the upper side of the butterfly spring (15) and is attached to the second step layer (31); A fixing plate (16) is also fixedly disposed outside the shaft core (11), the fixing plate (16) being located on the lower side of the eccentric aluminum part (44), and a mounting foot (21) is disposed on the lower side of the fixing plate (16), and a wear-reducing plate (20) is disposed between the eccentric aluminum part (44) and the fixing plate (16); A compression spring (24) is provided between the connecting plate (43) and the eccentric aluminum part (44), and the compression spring (24) is located outside the bearing platform (13).

2. A high-durability timing tensioner according to claim 1, characterized in that: A positioning ring plate (17) is provided on the upper side of the bearing platform (13), the butterfly spring (15) is located inside the positioning ring plate (17), and the inner diameter of the positioning ring plate (17) is greater than the outer diameter of the butterfly spring (15).

3. A high-durability timing tensioner according to claim 2, characterized in that: A plurality of weight-reducing grooves (18) are provided at equal distances in the outer curved surface of the positioning ring plate (17); a curved plate (32) extending downward into the weight-reducing groove (18) is integrally formed in the curved surface of the connecting plate (43); A plurality of convex columns (33) are also arranged at equal angles on the outer curved surface of the positioning ring plate (17), and a through groove penetrating from top to bottom for accommodating the convex columns (33) is provided in the connecting plate (43).

4. The high-durability timing tensioner according to claim 1, characterized in that: A self-lubricating bearing (22) is provided between the shaft core (11) and the eccentric aluminum part (44).

5. The high-durability timing tensioner according to claim 1, characterized in that: A locking column (19) is provided at the lower edge of the outer curved surface of the shaft core (11), and a slot for accommodating the locking column (19) is provided in the fixing plate (16).

6. A high-durability timing tensioner according to claim 5, characterized in that: A straight portion without curvature is provided in the curved surface of the locking column (19), and the locking groove is adapted in shape to the locking column (19).

7. The high-durability timing tensioner according to claim 1, characterized in that: Two mounting feet (21) are provided.

8. The high-durability timing tensioner according to claim 1, characterized in that: The wear reducing plate (20) is provided with no less than two positioning columns (23), and a positioning groove for accommodating the positioning columns (23) is provided in the lower side surface of the eccentric aluminum part (44).

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