Chain wheel locking structure of transmission device

Abstract

The utility model discloses a transmission device chain wheel locking structure which comprises two shaft seats, a main shaft and a chain wheel, the two ends of the main shaft are arranged on the two shaft seats, a limiting annular step is arranged on the main shaft and located between the two shaft seats, and a locking thread is arranged on the side, away from the limiting annular step, of the main shaft. The portion, between the locking thread and the limiting annular boss, of the main shaft is used for installing the chain wheel, a key groove is further formed in the position, corresponding to the chain wheel, of the main shaft, a limiting key is arranged in the key groove, a strip-shaped key hole matched with the limiting key is formed in the chain wheel, and one end face of the chain wheel is attached to the limiting annular step. The other end face of the chain wheel is attached to a locking nut matched with the locking thread. The utility model has the advantages that the structure is simple, the mounting and the locking are convenient, the main shaft does not need to be punched, the rigidity and the strength of the main shaft are not changed, the service life of the main shaft is not shortened, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a sprocket locking structure of a transmission device. Background Art

[0002] The sprocket drive mechanism is a mechanical mechanism in which a sprocket and a main shaft cooperate to transmit power in conjunction with a chain. Traditionally, the sprocket and the main shaft are connected by keyways, hook wedge keys and multiple fixings to achieve locking of the sprocket. This structure is complex and easily damaged, with poor locking firmness, cumbersome installation, and inaccurate positioning. During installation, multiple holes need to be drilled on the main shaft to cooperate with the fixings to achieve locking. However, drilling holes will reduce the strength of the main shaft, resulting in a significant reduction in the service life of the main shaft. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a transmission device sprocket locking structure. The utility model has a simple structure and is convenient for installation and locking. At the same time, there is no need to drill holes on the main shaft, thereby ensuring that the rigidity and strength of the main shaft remain unchanged, will not shorten the service life of the main shaft, and reduces the cost of use.

[0004] The purpose of the utility model is achieved through the following technical solutions: a transmission device sprocket locking structure, including two shaft seats, a main shaft and a sprocket, the two ends of the main shaft are arranged on the two shaft seats, a limiting annular step is provided on the main shaft between the two shaft seats, a locking thread is provided on the side of the main shaft away from the limiting annular step, the main shaft between the locking thread and the limiting annular boss is used to install the sprocket, a keyway is also provided at the main shaft corresponding to the sprocket, a limiting key is provided in the keyway, a strip key hole is provided on the sprocket that cooperates with the limiting key, one end face of the sprocket is fitted with the limiting annular step, and the other end face of the sprocket is fitted with a locking nut that cooperates with the locking thread.

[0005] In one preferred embodiment, a locking gasket is provided between the locking nut and the end surface of the sprocket.

[0006] In one preferred embodiment, the locking thread is a reverse thread.

[0007] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to install and disassemble, while the locking is more secure, not easy to loosen, and the positioning is more accurate; no drilling and positioning and locking are required during installation, so the overall structure of the main shaft will not be damaged, the rigidity and strength of the main shaft are guaranteed to remain unchanged, the service life of the main shaft remains unchanged, and the use cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0011] In the figure, 1-shaft seat, 2-spindle, 3-sprocket, 4-limiting annular step, 5-keyway, 6-limiting key, 7-bar keyhole, 8-locking thread, 9-locking nut, 10-locking gasket. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0015] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0016] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0017] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0018] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 and Figure 2 The utility model provides a technical solution: a locking structure of a sprocket 3 of a transmission device, comprising two shaft seats 1, a main shaft 2 and a sprocket 3, wherein both ends of the main shaft 2 are arranged on the two shaft seats 1, a limiting annular step 4 is provided on the main shaft 2 between the two shaft seats 1, a locking thread 8 is provided on the side of the main shaft 2 away from the limiting annular step 4, the main shaft 2 between the locking thread 8 and the limiting annular boss is used to install the sprocket 3, a key groove 5 is further provided at the main shaft 2 corresponding to the sprocket 3, a limiting key 6 is provided in the key groove 5, a strip key hole 7 matched with the limiting key 6 is provided on the sprocket 3, one end face of the sprocket 3 is fitted with the limiting annular step 4, and the other end face of the sprocket 3 is fitted with a locking nut 9 matched with the locking thread 8.

[0022] Preferably, a locking washer 10 is provided between the locking nut 9 and the end surface of the sprocket 3. Further locking ensures that the locking structure is more secure and not easy to loosen.

[0023] Preferably, the locking thread 8 is a reverse thread, which ensures that the locking nut 9 will not loosen during the rotation process, thereby improving the safety of the entire structure.

[0024] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the technology and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. The transmission device sprocket locking structure is characterized by: The sprocket wheel comprises two shaft seats, a main shaft and a sprocket, wherein two ends of the main shaft are arranged on the two shaft seats, a limiting annular step is provided on the main shaft between the two shaft seats, a locking thread is provided on the side of the main shaft away from the limiting annular step, the main shaft between the locking thread and the limiting annular boss is used to install the sprocket, a keyway is also provided at the main shaft corresponding to the sprocket, a limiting key is provided in the keyway, a strip keyhole matching the limiting key is provided on the sprocket, one end face of the sprocket is fitted with the limiting annular step, and the other end face of the sprocket is fitted with a locking nut matching the locking thread.

2. The transmission device sprocket locking structure according to claim 1, characterized in that: A locking gasket is arranged between the locking nut and the end surface of the sprocket.

3. The transmission device sprocket locking structure according to claim 1, characterized in that: The locking thread is a reverse thread.

Images