Chain wheel with replaceable tooth profile

Abstract

The utility model discloses a tooth form replaceable chain wheel which comprises a wheel body, a plurality of sets of sprocket grooves used for containing sprockets are formed in the wheel body, the sprockets are rotationally connected with the sprocket grooves through rotating columns, linkage rods are movably arranged on the sprockets, one ends of the linkage rods are in sliding connection with the wheel body through connecting rods, and the other ends of the linkage rods are in sliding connection with the wheel body through connecting rods. A guide wheel coaxial with the wheel body is rotatably arranged on the wheel body, a plurality of sets of guide faces are arranged on the outer wall of the guide wheel in the circumferential direction of the guide wheel, the connecting rod is sleeved with a linkage plate, one end of the linkage plate is in sliding connection with the guide faces, and the guide wheel is driven to rotate along the central axis of the wheel body. In a traditional mode, when chain wheel teeth are switched, people need to rotate and replace the chain wheel teeth one by one manually, time and labor are wasted, the labor amount of workers is large, the switching efficiency is low, and convenience is not enough, and the chain wheel teeth can be conveniently switched by the people.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission sprockets, in particular to a tooth-shaped replaceable sprocket. Background Art

[0002] A sprocket is a mechanical component used to transmit power or motion. It is usually made of metal and has multiple teeth. The sprocket is used in conjunction with a chain. Power is transmitted through the engagement of the chain and the sprocket teeth.

[0003] The Chinese utility model patent with publication number CN203585268U discloses a sprocket with convertible tooth shape, including a wheel body, a sprocket notch provided on the wheel body, an elastic clip provided on the sprocket notch, a sprocket tooth assembly provided in the sprocket notch, the sprocket tooth assembly including a first sprocket tooth, a rotating column, and a second sprocket tooth. The first sprocket tooth, the rotating column and the second sprocket tooth are an integrated structure, first limiting grooves are respectively provided on both sides of the first sprocket tooth, the elastic clip matches the first limiting groove, second limiting grooves are respectively provided on both sides of the second sprocket tooth, the elastic clip matches the second limiting groove, the elastic clip clamps the sprocket tooth assembly, the rotating column passes through the through hole on the sprocket notch, one end of the rotating column is screwed into a nut, and the sprocket tooth assembly is movably connected in the sprocket notch. This utility model completes the work of converting the sprocket tooth shape by rotating the sprocket tooth assembly, thereby improving the meshing accuracy of the sprocket and the machine.

[0004] However, the conversion of the sprocket teeth requires manual rotation and replacement one by one, which is time-consuming and labor-intensive, has a large amount of manual labor, low conversion efficiency, and is not convenient enough. Utility Model Content

[0005] The purpose of the utility model is to provide a sprocket with replaceable tooth shape, which can facilitate personnel to change the sprocket teeth on the wheel body.

[0006] The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions: a tooth-shaped replaceable sprocket, including a wheel body, a plurality of sprocket grooves for placing sprockets are provided on the wheel body, the sprockets are rotatably connected to the sprocket grooves through a rotating column, a linkage rod is movably provided on the sprocket, and one end of the linkage rod is slidably connected to the wheel body through a connecting rod, a guide wheel coaxial with the wheel body is rotatably provided on the wheel body, a plurality of groups of guide surfaces are provided on the outer wall of the guide wheel along its circumference, a linkage plate is sleeved on the connecting rod, one end of the linkage plate is slidably connected to the guide surface, and the guide wheel is driven to rotate along the central axis of the wheel body, thereby driving the linkage plate to slide radially along the wheel body.

[0007] Preferably, a guide groove is provided on the chain tooth, a movable rod is slidably provided at the guide groove, and the other end of the linkage rod is rotatably connected to the movable rod.

[0008] Preferably, a limiting groove is provided in the guide groove along its length direction, and opposite ends of the movable rod are slidably connected to the limiting groove via sliders.

[0009] Preferably, a driving wheel is provided on the side of the guide wheel away from the wheel body, a through hole 1 is provided in the middle of the guide wheel, a through hole 2 is provided in the middle of the driving wheel which is concentric with the through hole, and the inner diameter of the through hole 2 is smaller than the through hole 1, and a fixing bolt is screwed between the through hole 2 and the through hole 1 on the driving wheel.

[0010] Preferably, an extension plate is provided on the outer wall of the driving wheel.

[0011] Preferably, the linkage rod is rotatably connected to the connecting rod.

[0012] The beneficial effects of the present invention are as follows: a guide wheel is arranged on the wheel body, a guide surface is arranged on the guide wheel, a linkage rod is movably arranged on each group of chain teeth, the linkage rod is slidably connected to the wheel body through a connecting rod, and a linkage plate is sleeved on the connecting rod and slidably connected to the guide surface, so that when the guide wheel is driven to rotate, it can synchronously and indirectly drive each group of chain teeth on the wheel body to rotate around the central axis of the rotating column, changing the chain teeth to be located at the outer end of the chain tooth groove. Compared with the existing technology, there is no need for personnel to manually convert the chain teeth on the wheel body one by one, which reduces a certain amount of manual labor and has faster conversion efficiency. At the same time, a driving wheel is arranged on the guide wheel, and a fixing bolt is arranged on the driving wheel, which is convenient for personnel to limit the guide wheel after the rotation is completed, avoiding the problem of the guide wheel being driven to rotate by external impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram for illustrating the external mechanism of the wheel body in one embodiment of the present invention;

[0014] Figure 2 for Figure 1 Enlarged view of part A;

[0015] Figure 3 This is an exploded view for showing part of the mechanism on the wheel body in one embodiment of the present utility model;

[0016] Figure 4 for Figure 3 Magnified view of part B.

[0017] Figure numerals: 1, wheel body; 2, sprocket groove; 3, sprocket; 4, rotating column; 5, linkage rod; 6, connecting rod; 7, guide wheel; 8, guide surface; 9, linkage plate; 10, guide groove; 11, movable rod; 12, slider; 13, limiting groove; 14, driving wheel; 15, through hole 1; 16, through hole 2; 17, fixing bolt; 18, extension plate. DETAILED DESCRIPTION

[0018] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. At the same time, it should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as within the scope of protection of the present invention.

[0019] It should be noted that in this article, relational terms such as first and second, such as "connector board one, connector board two", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0020] The directional words mentioned in this embodiment, such as "up, down, left, right", etc., are only used in conjunction with the drawings to enable technicians in this technical field to understand the relationship between various features or parts.

[0021] In this embodiment, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; 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, ordinary technicians in this field can understand the specific meanings of the above terms in this utility model according to specific circumstances.

[0022] like Figures 1 to 4 As shown, a toothed replaceable sprocket comprises a wheel body 1 and several groups of sprocket grooves 2 for placing sprocket teeth 3 thereon, and the sprocket teeth 3 are rotatably connected to the sprocket grooves 2 through rotating columns 4. In this embodiment, a notch is provided on the outer wall of the sprocket tooth 3 along its length direction (not shown in the drawings), and a guide groove 10 is provided on the left and right sides of one end of the sprocket tooth 3 inside the notch. A movable rod 11 is slidably provided at the guide groove 10, and the left and right ends of the movable rod 11 are respectively located in the two groups of guide grooves 10. A linkage rod 5 is sleeved on the outer wall of the movable rod 11, and the other end of the linkage rod 5 is slidably connected to the wheel body 1 through a connecting rod 6, and the linkage rod 5 and the connecting rod 6 are rotatably connected. A guide wheel 7 coaxial with it is rotatably provided on the outer wall of the wheel body 1, and several groups of guide surfaces 8 are provided on the outer wall of the guide wheel 7 along its circumference. The number of guide surfaces 8 is consistent with the number of sprocket teeth 3 placed on the wheel body 1. In this embodiment, the guide surface 8 is inclined.

[0023] An L-shaped linkage plate 9 is sleeved on the outer wall of the connecting rod 6, one end of the linkage plate 9 is slidably connected to the guide surface 8, and a limiting groove 13 is provided along its length direction in the guide groove 10. The length of the limiting groove 13 is smaller than the length of the guide groove 10, and the opposite ends of the movable rod 11 are slidably connected to the limiting groove 13 by sliders 12. The purpose is to limit the movable rod 11 from sliding out of the guide groove 10.

[0024] A driving wheel 14 is provided on the side of the guide wheel 7 away from the wheel body 1, and a through hole 15 is provided in the middle of the guide wheel 7. A through hole 2 16 concentric with the through hole 15 is provided in the middle of the driving wheel 14, and the inner diameter of the through hole 2 16 is smaller than the through hole 15. A fixing bolt 17 is screwed between the through hole 2 16 and the through hole 1 15 on the driving wheel 14. Its purpose is to facilitate personnel to synchronously drive the guide wheel 7 by rotating the driving wheel 14, and to limit the positioning of the driving wheel 14 by the fixing bolt 17.

[0025] Extension plates 18 are provided at opposite ends of the outer wall of the driving wheel 14 to further facilitate personnel in rotating the driving wheel 14 and to make it more convenient to receive force.

[0026] When personnel do not replace it, the top bolt 17 is in a tightened state, the driving wheel 14 is restricted and cannot be driven, the sprocket 3 on the wheel body 1 is collided, and when the sprocket 3 is forced to rotate around the central axis of the rotating column 4, the linkage rod 5 will be pressed down through the movable rod 11. However, since the position of the linkage rod 5 is restricted by the connecting rod 6, the connecting rod 6 is restricted by the linkage plate 9. One end of the linkage plate 9 is on the guide surface 8, and the guide wheel 7 is restricted and cannot rotate, so that the sprocket 3 does not rotate, and the slider 12 of the movable rod 11 will also restrict the sprocket 3 from rotating around the central axis of the rotating column 4.

[0027] When personnel need to perform an overall conversion of the sprocket teeth 3 on the sprocket, first loosen the top fixing bolt 17, rotate the driving wheel 14, the guide wheel 7 is driven synchronously, one end of the linkage plate 9 slides on the guide surface 8, and gradually drives the linkage rod 5 through the connecting rod 6. The linkage rod 5 pulls the sprocket teeth 3 around the central axis of the rotating column 4 through the movable rod 11 to start rotating, so that there is no need for personnel to manually perform one by one conversion.

[0028] It should be noted that since the movable rod 11 and the connecting rod 6 are both rotatably connected to the linkage rod 5, when the sprocket 3 rotates, the two ends of the linkage rod 5 can freely rotate around the central axis of the movable rod 11 and the central axis of the connecting rod 6 by a certain angle, and after the sprocket 3 rotates by a certain angle, the two ends of the movable rod 11 will slide in the guide groove 10 through the slider 12 to avoid interfering with the rotation of the sprocket 3.

[0029] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A tooth-shaped replaceable sprocket, comprising a wheel body (1), the wheel body (1) being provided with a plurality of sprocket grooves (2) for accommodating sprockets (3), the sprockets (3) being rotatably connected to the sprocket grooves (2) via rotating columns (4), It is characterized in that A linkage rod (5) is movably provided on the chain teeth (3), and one end of the linkage rod (5) is slidably connected to the wheel body (1) via a connecting rod (6); A coaxial guide wheel (7) is rotatably provided on the wheel body (1), and a plurality of groups of guide surfaces (8) are provided on the outer wall of the guide wheel (7) along its circumference; A linkage plate (9) is sleeved on the connecting rod (6), and one end of the linkage plate (9) is slidably connected to the guide surface (8); The guide wheel (7) is driven to rotate along the central axis of the wheel body (1), thereby driving the linkage plate (9) to slide radially along the wheel body (1).

2. A tooth-shaped replaceable sprocket according to claim 1, characterized in that: A guide groove (10) is provided on the chain tooth (3), a movable rod (11) is slidably provided at the guide groove (10), and the other end of the linkage rod (5) is rotatably connected to the movable rod (11).

3. A tooth-shaped replaceable sprocket according to claim 2, characterized in that: A limiting groove (13) is provided in the guide groove (10) along its length direction, and opposite ends of the movable rod (11) are slidably connected to the limiting groove (13) via sliders (12).

4. The tooth-shaped replaceable sprocket according to claim 1, characterized in that: A driving wheel (14) is provided on the side of the guide wheel (7) away from the wheel body (1), a through hole (15) is provided in the middle of the guide wheel (7), a through hole (16) is provided in the middle of the driving wheel (14) and the through hole (15) is concentric with the through hole (15), and the inner diameter of the through hole (16) is smaller than that of the through hole (15), and a fixing bolt (17) is screwed between the through hole (16) and the through hole (15) on the driving wheel (14).

5. A tooth-shaped replaceable sprocket according to claim 4, characterized in that: An extension plate (18) is provided on the outer wall of the driving wheel (14).

6. The tooth-shaped replaceable sprocket according to claim 1, characterized in that: The linkage rod (5) is rotationally connected to the connecting rod (6).

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