Tensioner assembly convenient to maintain

Abstract

The utility model discloses a tensioner assembly convenient to maintain, which relates to the field of belt tensioners and comprises a mounting seat, a connecting column is mounted at one end of the mounting seat, a fixed wheel is rotatably mounted at one end, far away from the mounting seat, of the connecting column, and a tensioning wheel mechanism is rotatably mounted on the periphery of the fixed wheel through a bearing. A brake mechanism for limiting the fixed wheel is installed on the outer wall of the connecting column, and a hexagonal block protruding outwards is integrally formed at the position, aligned to one end of the connecting column, of the end, away from the connecting column, of the fixed wheel; a rotating groove is formed in the end, away from the mounting base, of the connecting column, a rotating column is rotationally mounted on the inner wall of the rotating groove, and the section of the rotating column and the section of the rotating groove are of a structure shaped like a Chinese character'tu 'and topple by 90 degrees. The tensioning wheel mechanism and the mounting plate are arranged, so that the outer wheel can be conveniently replaced after being abraded, and a worker can conveniently maintain the outer wheel.

Description

Technical Field

[0001] This utility model relates to the field of belt tensioners, specifically a tensioner assembly that is easy to maintain. Background Technology

[0002] The tensioner is used on the timing belt or timing chain of the engine to guide and tighten it, ensuring that it is always in the optimal tension state.

[0003] In the existing technology, there are many types of tensioners. Their outer wheel is generally connected to the fixed wheel through a bearing. Therefore, when impurities are carried on the belt and pass through the outer wheel, the surface of the outer wheel will be scratched. The scratched area will continue to damage the belt. Therefore, when this happens, the outer wheel needs to be replaced. In the existing technology, the outer wheel is generally interference-fitted onto the outer ring of the bearing, which is inconvenient during the replacement process. Utility Model Content

[0004] The purpose of this utility model is to provide a tensioner assembly that is easy to maintain, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tensioner assembly that is easy to maintain, including a mounting base, a connecting column mounted on one end of the mounting base, a fixed wheel rotatably mounted on the end of the connecting column away from the mounting base, a tensioning wheel mechanism rotatably mounted on the outer periphery of the fixed wheel via a bearing, a brake mechanism for limiting the position of the fixed wheel mounted on the outer wall of the connecting column, and an outwardly protruding hexagonal block integrally formed at the position where the end of the fixed wheel away from the connecting column is aligned with the end of the connecting column.

[0006] The connecting column has a rotating groove at the end away from the mounting base. The rotating column is rotatably mounted on the inner wall of the rotating groove. The cross-section of the rotating column and the rotating groove forms a "convex" shape with an inverted 90-degree angle.

[0007] As a further embodiment of this utility model: the tensioning wheel mechanism includes an inner wheel that is interference-fitted onto the outer ring of the bearing, an outer wheel that is sleeved on the outer ring of the inner wheel, and a limiting ring portion that protrudes inwardly is formed at the end of the outer wheel away from the mounting base.

[0008] As a further embodiment of this utility model: an mounting plate is fixedly installed on the end face of the inner wheel near the mounting base, and multiple mounting plates are equidistantly distributed in the circumferential direction. An arc-shaped groove is provided on the mounting plate, and a threaded hole is provided on the end face of the outer wheel away from the limiting ring. A bolt passes through the arc-shaped groove and is connected to the threaded hole.

[0009] As a further embodiment of this utility model: the braking mechanism includes a fixed plate fixedly connected to the outer periphery of the connecting column, a sliding plate slidably connected between the fixed plate and the fixed wheel on the outer periphery of the connecting column, and a rubber pad fixedly installed on the side of the sliding plate that contacts the fixed wheel.

[0010] As a further embodiment of this utility model: the braking mechanism further includes a guide rod integrally formed on the end of the sliding plate away from the fixed wheel, the end of the guide rod away from the fixed wheel having an integrally formed disc-shaped protrusion, a return spring being fixedly connected between the end face of the fixed plate and the disc-shaped protrusion, and the return spring being sleeved with the guide rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting up a tensioning wheel mechanism and mounting plate, the outer wheel can be replaced more easily after it wears out, thus facilitating maintenance by staff. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0015] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 4 For the present utility model Figure 3 Enlarged view of a portion of point A in the middle.

[0017] In the diagram: 1. Mounting base; 2. Connecting column; 3. Fixed wheel; 4. Outer wheel; 5. Hexagonal block; 6. Fixing plate; 7. Sliding plate; 8. Guide rod; 9. Return spring; 10. Bearing; 11. Rotating column; 12. Rotating groove; 13. Rubber pad; 14. Inner wheel; 15. Mounting plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4In this embodiment of the utility model, a tensioner assembly that is easy to maintain includes a mounting base 1. A connecting post 2 is mounted on one end of the mounting base 1. A fixed wheel 3 is rotatably mounted on the end of the connecting post 2 away from the mounting base 1. A tensioning wheel mechanism is rotatably mounted on the outer periphery of the fixed wheel 3 through a bearing 10. A brake mechanism for limiting the fixed wheel 3 is mounted on the outer wall of the connecting post 2. A hexagonal block 5 protruding outward is integrally formed at the position where the end of the fixed wheel 3 away from the connecting post 2 is aligned with the end of the connecting post 2. A rotating groove 12 is opened at the end of the connecting post 2 away from the mounting base 1. A rotating post 11 is rotatably mounted on the inner wall of the rotating groove 12. The cross-section of the rotating post 11 and the rotating groove 12 forms a "convex" shape structure tilted at ninety degrees.

[0020] In this embodiment: First, when adjusting the tension of the belt by the tensioning wheel mechanism, a tool (such as a hex wrench) is used to connect with the hexagonal block 5, and the hexagonal block 5 is rotated by the handle. The rotating hexagonal block 5 drives the fixed wheel 3 to rotate, and the fixed wheel 3 drives the rotating column 11 to rotate in the rotating groove 12. Since the fixed wheel 3 and the connecting column 2 are eccentrically connected, the fixed wheel 3 can effectively tension the belt during the rotation from bottom to top, maintaining the transmission performance of the belt. When the force applied to the hexagonal block 5 is removed, the fixed wheel 3 can be kept in the current position under the limit of the brake mechanism. Compared with other tensioners that use torsion springs or spring return forces to make the outer wheel 4 tension the belt, the structure of this application is simpler, and therefore the maintenance process is more convenient.

[0021] When scratches appear on the outer surface of the tensioner mechanism, it needs to be replaced in time to avoid damage to the surface of the tensioned belt caused by the scratches.

[0022] Please refer to this carefully. Figure 3 and Figure 4 The tensioning wheel mechanism includes an inner wheel 14 that is interference-fitted onto the outer ring of the bearing 10. An outer wheel 4 is sleeved on the outer ring of the inner wheel 14. The outer wheel 4 has an inwardly protruding limiting ring at the end away from the mounting base 1. A mounting plate 15 is fixedly mounted on the end face of the inner wheel 14 near the mounting base 1. Multiple mounting plates 15 are equidistantly distributed in the circumferential direction. An arc-shaped slot is provided on the mounting plate 15. A threaded hole is provided on the end face of the outer wheel 4 away from the limiting ring. A bolt passes through the arc-shaped slot and connects to the threaded hole.

[0023] In this embodiment: When replacing the outer wheel 4, first rotate the hexagonal block 5 to completely separate the outer wheel 4 from the belt. Use a tool to connect with one end of the bolt and drive the bolt to rotate and unscrew until the bolt is completely separated from the threaded arc groove. At this point, the outer wheel 4 can be moved to separate the outer wheel 4 from the surface of the inner wheel 14. Then, replace it with a new outer wheel 4 and put the new outer wheel 4 on the surface of the inner wheel 14 until the limiting ring of the outer wheel 4 contacts one end of the inner wheel 14. At this point, the outer wheel 4 cannot move continuously. Then rotate the outer wheel 4 to align the threaded hole with the arc groove. Then, pass the bolt through the arc groove and thread it into the threaded hole. After the bolt is fully tightened, the outer wheel 4 can be fixed.

[0024] Please refer to this carefully. Figure 2 and Figure 3 The braking mechanism includes a fixed plate 6 fixedly connected to the outer periphery of the connecting column 2. A sliding plate 7 is slidably connected between the fixed plate 6 and the fixed wheel 3 on the outer periphery of the connecting column 2. A rubber pad 13 is fixedly installed on the side of the sliding plate 7 that contacts the fixed wheel 3. The braking mechanism also includes a guide rod 8 integrally formed on the end of the sliding plate 7 away from the fixed wheel 3. A disc-shaped protrusion is integrally formed on the end of the guide rod 8 away from the fixed wheel 3. A return spring 9 is fixedly connected between the end face of the fixed plate 6 and the disc-shaped protrusion. The return spring 9 is sleeved with the guide rod 8.

[0025] In this embodiment: after the fixed wheel 3 is adjusted, the reset force of the reset spring 9 acts on the limiting protrusion of the guide rod 8. Therefore, the guide rod 8 continuously applies a squeezing force to the sliding plate 7. The squeezing force acts on the rubber pad 13 through the sliding plate 7. The rubber pad 13 continuously applies a squeezing force to the fixed wheel 3 and generates static friction, thus preventing the fixed wheel 3 from rotating on its own without human intervention.

[0026] When using tools to connect with hexagonal block 5, the wrench has a large lever arm, so the fixed wheel 3 can be rotated by the wrench.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A maintenance-friendly tensioner assembly, comprising a mounting base (1), wherein a connecting post (2) is mounted at one end of the mounting base (1), characterized in that, A fixed wheel (3) is rotatably mounted on the end of the connecting column (2) away from the mounting base (1). A tensioning wheel mechanism is rotatably mounted on the outer periphery of the fixed wheel (3) through a bearing (10). A brake mechanism for limiting the fixed wheel (3) is installed on the outer wall of the connecting column (2). A hexagonal block (5) protruding outward is integrally formed at the position where the end of the fixed wheel (3) away from the connecting column (2) is aligned with the end of the connecting column (2). The connecting column (2) has a rotating groove (12) at one end away from the mounting base (1). A rotating column (11) is rotatably installed on the inner wall of the rotating groove (12). The cross-section of the rotating column (11) and the rotating groove (12) forms a "convex" shape with a 90-degree inclination.

2. The easy-to-maintain tensioner assembly according to claim 1, characterized in that, The tensioning wheel mechanism includes an inner wheel (14) that is interference-fitted onto the outer ring of the bearing (10), and an outer wheel (4) that is sleeved on the outer ring of the inner wheel (14). The outer wheel (4) has an inwardly protruding limiting ring formed at one end away from the mounting base (1).

3. The tensioner assembly for easy maintenance according to claim 2, characterized in that, An mounting plate (15) is fixedly installed on the end face of the inner wheel (14) near the mounting base (1). Multiple mounting plates (15) are evenly distributed in the circumferential direction. An arc-shaped groove is opened on the mounting plate (15). A threaded hole is opened on the end face of the outer wheel (4) away from the limiting ring. A bolt passes through the arc-shaped groove and connects to the threaded hole.

4. The tensioner assembly for easy maintenance according to claim 3, characterized in that, The braking mechanism includes a fixed plate (6) fixedly connected to the outer periphery of the connecting column (2), and a sliding plate (7) slidably connected between the fixed plate (6) and the fixed wheel (3) on the outer periphery of the connecting column (2). A rubber pad (13) is fixedly installed on the side of the sliding plate (7) that contacts the fixed wheel (3).

5. A tensioner assembly for easy maintenance according to claim 4, characterized in that, The braking mechanism also includes a guide rod (8) integrally formed on the end of the sliding plate (7) away from the fixed wheel (3). The end of the guide rod (8) away from the fixed wheel (3) is integrally formed with a disc-shaped protrusion. A return spring (9) is fixedly connected between the end face of the fixed plate (6) and the disc-shaped protrusion. The return spring (9) is sleeved with the guide rod (8).

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