Novel chain wheel and transmission structure thereof

Abstract

The utility model discloses a novel chain wheel which comprises a chain wheel hub. The chain wheel hub comprises a hub inner hole, a hub body, a plurality of hub embedding parts evenly distributed in the circumferential direction of the axis of the hub body, and a chain wheel assembled with the chain wheel hub in a matched mode. The chain wheel comprises a chain wheel body, a plurality of chain grooves evenly distributed relative to the outer edge of the chain wheel body, a plurality of chain wheel embedding parts evenly distributed relative to the inner edge of the chain wheel body, and a radial open groove located in the chain wheel body. The utility model further provides a novel chain wheel transmission structure which comprises the novel chain wheel and further comprises a transmission shaft arranged in an inner hole of a hub in a penetrating mode and a chain wheel pressing plate located on the outer side of the chain wheel. According to the novel chain wheel, the chain wheel is made of the non-metal material with the opening groove and is matched with a non-metal chain, abrasion can be reduced, disassembly, assembly and replacement are convenient, the service life of a chain wheel transmission structure is prolonged, and the maintenance cost is reduced.

Description

Technical Field

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

[0002] Sprocket drive is a widely used mechanical transmission method that transmits power and motion through the meshing of a chain and a sprocket. Chain drive mainly consists of a sprocket, a chain, and a drive shaft. The sprocket is equipped with teeth with a special tooth shape, and the power is transmitted by the meshing of the sprocket teeth with the chain links. The sprocket is the most important component in the chain drive process. There are two known sprocket structures. One is an integral sprocket. Due to the friction and wear between the sprocket and the chain during operation, especially during normal operation, the sprocket is easily worn and damaged, and the machine needs to be stopped for replacement. Due to the tight fit between the sprocket and the drive shaft and the fixed bearings at both ends of the drive shaft, the process of removing the sprocket is complicated, time-consuming and labor-intensive.

[0003] There is also a sprocket composed of a gear ring and a hub, such as CN219949467U, which discloses a split sprocket for a buried scraper conveyor. The sprocket is designed as a structure composed of a hub and a sprocket plate. The sprocket plate is designed as a split sprocket plate. When the sprocket is worn, the sprocket plate needs to be replaced. However, the sprocket plate of the patent is split, and it is difficult to achieve the coaxial requirement of the combined installation and the drive shaft. It is difficult to ensure the concentricity of the split sprocket plate when it is assembled. It is also easy to be eccentrically misaligned during use. The sprocket plate is a metal structure and cannot avoid friction loss with the chain. It still needs high-frequency disassembly and replacement. Although there are currently non-metallic chains, using a metal sprocket to engage with the non-metallic chain makes the chain easy to wear and has a short service life. Moreover, using a non-metallic conventional sprocket makes it time-consuming and laborious to replace the sprocket after the sprocket is worn.

[0004] Therefore, how to provide a non-assembled, non-metallic sprocket plate structure to reduce the wear of the chain or sprocket and facilitate disassembly and replacement is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a new sprocket and its transmission structure, the new sprocket transmission structure has a non-metallic chain and a non-metallic sprocket structure, so as to reduce the loss during normal operation and facilitate rapid disassembly and replacement.

[0006] To achieve the above-mentioned purpose, the utility model provides a new type of sprocket comprising:

[0007] sprocket hub;

[0008] The sprocket hub includes a hub inner hole, a hub body, and a plurality of hub inlay parts evenly distributed along the circumference of the hub body axis.

[0009] a sprocket assembled in conjunction with a sprocket hub;

[0010] The sprocket comprises a sprocket body, a plurality of chain grooves evenly distributed relative to the outer edge of the sprocket body, a plurality of sprocket inlay parts evenly distributed relative to the inner edge of the sprocket body, and a radial opening groove on the sprocket body.

[0011] Furthermore, the sprocket is made of a metallic elastic material or a non-metallic elastic material, and the sprocket hub is made of a metallic material.

[0012] Furthermore, the sprocket is made of a non-metallic elastic material, and the sprocket material is one of polyurethane, engineering plastics, nylon, rubber, and silicone resin polymer.

[0013] Furthermore, the hub inlay portion and the sprocket inlay portion correspond in number and are matched, the hub inlay portion is a dovetail-shaped groove, the sprocket inlay portion is a dovetail-shaped protrusion, and the dovetail-shaped groove is matched with the dovetail-shaped protrusion.

[0014] Furthermore, a first transition arc and a second transition arc are respectively provided at the matching positions of the dovetail-shaped notch of the hub inlay portion and the dovetail-shaped protrusion of the sprocket inlay portion.

[0015] Furthermore, the open groove passes through one side of the sprocket body from the center of the sprocket body to the radial edge, so that the sprocket body is an open ring structure.

[0016] Furthermore, the chain groove is an arc chain groove, and the chain groove pitch circle diameter is consistent with the tooth shape of the chain, and the spacing between adjacent chain grooves is the same as the pitch of the chain.

[0017] This utility model patent also provides a new sprocket transmission structure, which is characterized by comprising the new sprocket as described above, and also comprising a transmission shaft passing through the inner hole of the hub, and a sprocket pressure plate located outside the sprocket;

[0018] The sprocket pressure plate fixes the sprocket on the sprocket hub through fastening bolts.

[0019] Furthermore, the sprocket is provided with a plurality of sprocket fixing holes evenly distributed along the circumference of the center of the sprocket body, and the hub is provided with a plurality of fixing threaded holes evenly distributed along the circumference of the center of the hub body.

[0020] Furthermore, the hub body is connected and fixed to the transmission shaft via a key structure in the inner hole of the hub.

[0021] This utility model provides a new type of sprocket and a transmission structure with the new type of sprocket. The sprocket is configured to be a non-metallic material with an open groove, which is compatible with non-metallic chains. This can reduce wear, facilitate disassembly and replacement, and increase the service life and maintenance cost of the sprocket transmission structure. Since the sprocket needs to be replaced frequently during use, the setting of the open groove enables the sprocket to be designed as an open-loop structure. When replacing the sprocket, it is only necessary to loosen the sprocket pressure plates on both sides, remove the sprocket from the sprocket hub, and pry the sprocket apart from the opening to a width greater than the diameter of the drive shaft to replace the sprocket. Compared with the traditional method of replacing a sprocket, which requires first removing the drive shaft, then removing the end bearing, and then removing the sprocket in sequence before replacing the corresponding sprocket, the sprocket is designed as an open-loop structure, which can greatly shorten the time it takes to replace the sprocket. Moreover, the material of the sprocket is configured to be a non-metallic elastic material. When used with a non-metallic chain, wear is reduced and the service life is increased. The sprocket made of elastic material can be easily disassembled, assembled and replaced through elastic or plastic deformation and the open groove, which also avoids the problems of poor assembly accuracy and circumferential eccentricity and misalignment of traditional assembled sprockets. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the assembly structure of a novel sprocket transmission structure provided by an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the structure of a sprocket hub in a new sprocket provided by an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of a sprocket in a new sprocket provided in an embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the sprocket pressure plate structure in a new sprocket transmission structure provided by an embodiment of the utility model.

[0027] Among them: 1-sprocket hub; 2-slotted sprocket; 3-sprocket pressure plate; 4-fastening bolts; 5-drive shaft; 101-hub body; 102-hub inner hole; 103-hub inlay; 104-fixing threaded hole; 105-first transition arc; 201-sprocket body; 202-chain groove; 203-sprocket inlay; 204-sprocket fixing hole; 205-open slot; 206-second transition arc. DETAILED DESCRIPTION

[0028] The core of the utility model is to provide a new type of sprocket and a transmission structure with the new type of sprocket, so as to reduce wear, facilitate disassembly and replacement, and increase the service life and maintenance cost of the sprocket transmission structure.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and implementation methods.

[0030] Please refer to Figures 1 to 4 To achieve the above purpose, the present invention provides a new type of sprocket comprising: a sprocket hub 1; a sprocket 2 assembled with the sprocket hub 1; Figure 1 As shown in the figure, the sprocket 2 is mounted on the sprocket hub 1, the sprocket hub 1 is mounted on the transmission shaft 5, and the inner hole 102 of the sprocket hub 1 is fixed to the transmission shaft 5 through a key connection to transmit power to the sprocket; as shown in the attached figure Figure 2 In the embodiment, the sprocket hub 1 comprises a hub inner hole 102, a hub body 101 and a plurality of hub inlay portions 103 uniformly distributed along the circumference of the axis of the hub body 101, as shown in the attached Figure 3 In the embodiment, the sprocket 2 includes a sprocket body 201, a plurality of chain slots 202 evenly distributed relative to the outer edge of the sprocket body 201, a plurality of sprocket inlays 203 evenly distributed relative to the inner edge of the sprocket body 201, and a radially open groove 205 located on the sprocket body 201. The chain slots 202 are arc-shaped chain slots, and the pitch diameter of the chain slots 202 is consistent with the tooth profile of the chain. The spacing between adjacent chain slots 202 is the same as the pitch of the chain, ensuring normal engagement between the sprocket 2 and the chain. The hub inlay 103 is for mounting the sprocket 2. The number of hub inlays 103 is determined by the size of the sprocket hub 1 and is evenly distributed on the sprocket hub 1. The number of the hub inlays 103 corresponds to and matches the number of the sprocket inlays 203. The hub inlay 103 is a dovetail-shaped notch, and the sprocket inlay 203 is a dovetail-shaped protrusion. The dovetail-shaped notch matches the dovetail-shaped protrusion. After assembly, the protrusion of the sprocket insert 203 fits snugly within the dovetail groove of the hub insert 103, providing a tight fit. Furthermore, the first transition arc 105 and the second transition arc 206 are respectively provided where the dovetail groove of the hub insert 103 and the dovetail protrusion of the sprocket insert 203 mate. The provision of the first transition arc 105 and the second transition arc 206 prevents stress concentration during chain transmission, improves service life, and facilitates assembly, disassembly, and component processing.

[0031] As a further description of this embodiment, the sprocket 2 is made of a metal elastic material or a non-metal elastic material, and the sprocket hub 1 is made of a metal material. It is generally preferred that the sprocket 2 be made of a non-metal elastic material, and the sprocket 2 be made of one of polyurethane, engineering plastics, nylon, rubber, and silicone polymer. These materials have both certain strength and good toughness. The non-metal elastic material has good elasticity and ductility, and has good elastic deformation. The hardness range of the material is between 80 and 100 Shore hardness, ensuring that the sprocket 2 can be broken open from the opening groove 205 and removed from the drive shaft 5 without plastic deformation. The sprocket pressure plate 3 is made of metal material, which presses and fixes the sprocket 2 on the sprocket hub 1. After the sprocket 2 is pressed by the sprocket pressure plate 3, the strength meets the requirements of the chain drive.

[0032] As a further description of this embodiment, the open groove 205 passes through one side of the sprocket body 201 from the center to the radial edge of the sprocket body 201, so that the sprocket body 201 is an open ring structure. Figure 3 As shown in , the opening groove 205 is located in the semicircular portion of the sprocket body 201 and may or may not be located in the sprocket inlay portion 203. This embodiment is not particularly limited to this, and any structure that allows the sprocket 2 to be removed from the sprocket hub 1 by elastic deformation may be used. The opening groove 205 is located on one side of the sprocket 2 to disconnect the sprocket 2, forming a circumferentially non-enclosed structure. The sprocket 2 is designed as an open-loop structure, which facilitates the processing of the sprocket 2 and also facilitates the installation and replacement of the sprocket 2.

[0033] The sprocket 2 in this embodiment needs to be frequently replaced during use. The provision of the open slots 205 allows the sprocket 2 to be designed as an open-loop structure. To replace the sprocket 2, simply loosen the sprocket pressure plates 3 on both sides, remove the sprocket 2 from the sprocket hub 1, and then pry the sprocket 2 apart from the opening until its width is greater than the diameter of the transmission shaft 5. This allows the sprocket 2 to be replaced. That is, the sprocket 2 is fixed to the transmission shaft 5 via the sprocket hub 1 and the sprocket pressure plates 3. The sprocket 2 is made of a non-metallic material and needs to be frequently replaced during use. The open slots 205 provide the slotted sprocket 2 with an open-loop structure. To replace the sprocket 2, simply loosen the sprocket pressure plates 3 on both sides, remove the sprocket 2 from the sprocket hub 1 through the open slots 205, and replace the sprocket 2. Compared to conventional methods of replacing a sprocket 2, which require first removing the transmission shaft, then removing the end bearings, and finally removing the sprockets, the open-loop structure of the sprocket 2 significantly shortens the time required to replace the sprocket.

[0034] This embodiment also provides a new sprocket transmission structure, including the new sprocket described above, and also includes a drive shaft 5 passing through the inner hole 102 of the hub, and a sprocket pressure plate 3 located outside the sprocket 2; the sprocket pressure plate 3 fixes the sprocket 2 to the sprocket hub 1 via fastening bolts 4. Specifically, the hub body 101 is connected and fixed to the drive shaft 5 via a key structure in the inner hole 102 of the hub. The sprocket 2 can be fixed to the sprocket hub 1 via fastening bolts 4 on one side or both sides of the sprocket pressure plate 3, and the number of sprockets 2 is determined by the width of the chain. To facilitate installation, the sprocket 2 is provided with a plurality of sprocket fixing holes 204 evenly distributed along the central circumference of the sprocket body 201, and the sprocket hub 1 is provided with a plurality of fixing threaded holes 104 evenly distributed along the central circumference of the hub body 101. The diameter and number of the threaded fixing holes 104 are determined based on the size of the sprocket hub 1 and can be evenly distributed across a single circle or multiple circles. The threaded holes can achieve either bilateral or unilateral clamping. This embodiment does not specifically limit the number and layout of the threaded fixing holes 104; any arrangement sufficient to provide a secure connection will suffice. Similarly, the diameter and number of the sprocket fixing holes 204 are determined based on the size of the sprocket 2 and evenly distributed, with no specific limitations on their number or layout.

[0035] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only 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. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0037] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of sprocket, characterized in that: include: Sprocket hub (1); The sprocket hub (1) comprises a hub inner hole (102), a hub body (101), and a plurality of hub inlay portions (103) uniformly distributed along the circumference of the axis of the hub body (101). a sprocket (2) assembled in cooperation with the sprocket hub (1); The sprocket (2) comprises a sprocket body (201), a plurality of chain grooves (202) evenly distributed relative to the outer edge of the sprocket body (201), a plurality of sprocket inlay portions (203) evenly distributed relative to the inner edge of the sprocket body (201), and a radial opening groove (205) located on the sprocket body (201).

2. The novel sprocket according to claim 1, characterized in that: The sprocket (2) is made of a metallic elastic material or a non-metallic elastic material.

3. The novel sprocket according to claim 2, characterized in that: The sprocket (2) is made of a non-metallic elastic material, and the material of the sprocket (2) is one of polyurethane, engineering plastics, nylon, rubber, and silicone resin polymer.

4. The novel sprocket according to claim 1, characterized in that: The hub inlay portion (103) and the sprocket inlay portion (203) correspond in number and are adapted to each other; the hub inlay portion (103) is a dovetail-shaped slot, the sprocket inlay portion (203) is a dovetail-shaped protrusion, and the dovetail-shaped slot is adapted to the dovetail-shaped protrusion.

5. The novel sprocket according to claim 4, characterized in that: A first transition arc (105) and a second transition arc (206) are respectively provided at the matching positions of the dovetail-shaped notch of the hub inlay portion (103) and the dovetail-shaped protrusion of the sprocket inlay portion (203).

6. The novel sprocket according to claim 1, characterized in that: The open groove (205) penetrates one side of the sprocket body (201) from the center of the sprocket body (201) to the radial edge, so that the sprocket body (201) is an open-loop structure.

7. The novel sprocket according to claim 1, characterized in that: The chain groove (202) is an arc chain groove, and the pitch circle diameter of the chain groove (202) is consistent with the tooth shape of the chain, and the spacing between adjacent chain grooves (202) is the same as the pitch of the chain.

8. A new sprocket transmission structure, characterized in that A novel sprocket according to any one of claims 1 to 7, further comprising a transmission shaft (5) passing through an inner hole (102) of the hub, and a sprocket pressure plate (3) located outside the sprocket (2); The sprocket pressure plate (3) fixes the sprocket (2) to the sprocket hub (1) via fastening bolts (4).

9. The novel sprocket transmission structure according to claim 8, characterized in that: The sprocket (2) is provided with a plurality of sprocket fixing holes (204) uniformly distributed along the central circumference of the sprocket body (201), and the hub (1) is provided with a plurality of fixing threaded holes (104) uniformly distributed along the central circumference of the hub body (101).

10. The novel sprocket transmission structure according to claim 8, characterized in that: The hub body (101) is connected and fixed to the transmission shaft (5) via a key structure of the hub inner hole (102).

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