Wear-resistant driving chain wheel

Abstract

The utility model belongs to the technical field of chain wheels, and particularly relates to a wear-resistant driving chain wheel which comprises a base body and a plurality of wheel teeth, a shaft hole is axially formed in the base body, a key groove is formed in the inner wall of the shaft hole, the wheel teeth are circumferentially arranged around the base body at equal intervals, and a tooth groove is formed between every two adjacent wheel teeth; rolling structures are arranged in the tooth grooves and are used for rolling connection when the chain wheel is in contact with the chain in the tooth grooves; the rolling structures are arranged in the tooth grooves between the adjacent gear teeth, sliding of the chain and the chain wheel in the tooth grooves is changed into rolling when the chain makes contact with the chain wheel, and therefore abrasion to the tooth grooves is effectively reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sprockets, and in particular relates to a wear-resistant driving sprocket. Background Art

[0002] A sprocket is a wheel with cog-type sprocket teeth that engages with accurately pitched blocks on link links or cables, while a driving sprocket is the sprocket that drives the chain and is the power source of the chain drive. It needs to have high strength and wear resistance to ensure the stability and reliability of the transmission.

[0003] The traditional driving sprocket transmits the chain through the working surfaces on both sides of the teeth, but the chain is usually embedded in the tooth groove between the two teeth, and there is friction with the tooth groove surface during transmission, causing surface wear of the tooth groove and affecting the service life of the driving sprocket. Utility Model Content

[0004] The purpose of the utility model is to provide a wear-resistant driving sprocket in order to solve the above-mentioned technical problems, thereby improving the wear resistance of the sprocket and extending its service life.

[0005] In view of this, the present invention provides a wear-resistant driving sprocket, comprising:

[0006] The base body is provided with an axial hole in the axial direction, and a keyway is provided on the inner wall of the axial hole;

[0007] The gear teeth are provided in plurality and are arranged around the base body at equal intervals, and tooth grooves are formed between any two adjacent gear teeth;

[0008] The rolling structure is arranged in the tooth groove and is used for rolling connection between the sprocket and the chain when they contact the tooth groove.

[0009] In the above technical solution, further, the rolling structure includes:

[0010] The reinforcing rib is installed on the inner wall of the tooth groove, and an arc-shaped installation groove is formed on the inner wall surface of the tooth groove;

[0011] The rolling element is installed in the arc-shaped installation groove and is used for rolling connection when the sprocket contacts the chain.

[0012] In the above technical solution, further:

[0013] The rolling element comprises a plurality of first rollers installed along the arc-shaped installation groove, and the first rollers all protrude from the surface of the reinforcing rib along the radial direction of the base body;

[0014] The first roller protrudes from the surface of the reinforcing rib by 0.5-1 mm in the radial direction of the base.

[0015] In the above technical solution, further comprising:

[0016] The flange is located on the gear tooth and is radially arranged on both sides of an end of the gear tooth away from the base body;

[0017] The flange surface is smooth and flat, so that the sprocket can slide away from the chain smoothly after rotation.

[0018] In the above technical solution, further:

[0019] The flange is provided with a mounting groove, and a second roller is arranged in the mounting groove, and the second roller protrudes from the flange surface along the radial direction of the base body;

[0020] The second roller protrudes from the flange surface by 0.5-1 mm in the radial direction of the base.

[0021] In the above technical solution, further:

[0022] The first roller and the second roller are both axially provided with circular holes, and mounting bolts passing through the circular holes are respectively installed on the reinforcing rib and the flange;

[0023] The mounting bolt is clearance-matched with the circular hole.

[0024] In the above technical solution, further:

[0025] One end of the mounting bolt is provided with an abutment joint for abutting against the reinforcing rib and the flange surface, and the other end is provided with an annular groove, in which a retaining ring is installed.

[0026] In the above technical solution, further:

[0027] The two radial side surfaces of the gear teeth along the base form working surfaces, and the flange and the reinforcement ribs transition smoothly on the working surfaces.

[0028] The beneficial effects of the utility model are:

[0029] 1. By setting a rolling structure in the tooth groove between adjacent teeth, the sliding of the chain and sprocket when they contact in the tooth groove is converted into rolling, thereby effectively reducing the wear on the tooth groove and extending the service life.

[0030] 2. By adopting the setting of reinforcing ribs, the structural strength of the tooth groove is improved, and the installation of the rolling parts is also facilitated to ensure the rolling connection between the chain and the sprocket at the tooth groove.

[0031] 3. The flange arrangement can promote the stability of the chain in the tooth groove during transmission, and the smooth surface of the flange and the second roller on the flange can facilitate smooth sliding away from the chain after the sprocket rotates, avoiding jamming and improving the stability of the sprocket during transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the utility model;

[0033] Figure 2 It is a side view of the utility model;

[0034] Figure 3 This utility model Figure 2 Cross-sectional view at AA in the middle;

[0035] Figure 4 This utility model Figure 3 Enlarged view of point B in the middle;

[0036] Figure 5 This utility model Figure 2 Cross-sectional view at CC;

[0037] Figure 6 This utility model Figure 5 Enlarged view of point D in the middle;

[0038] The markings in the figure are as follows: 1. base; 2. shaft hole; 3. keyway; 4. gear teeth; 5. tooth groove; 6. reinforcing rib; 7. arc-shaped mounting groove; 8. first roller; 9. flange; 10. mounting groove; 11. second roller; 12. circular hole; 13. mounting bolt; 14. abutment joint; 15. annular groove; 16. retaining ring. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments; all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application are within the scope of protection of the present application.

[0040] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship; technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations; therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0041] Example 1:

[0042] This embodiment provides a wear-resistant driving sprocket, comprising:

[0043] The base body 1 is provided with an axial hole 2 in the axial direction, and a key groove 3 is provided on the inner wall of the axial hole 2;

[0044] A plurality of gear teeth 4 are provided and are arranged around the base 1 at equal intervals, and tooth grooves 5 are formed between any two adjacent gear teeth 4;

[0045] A rolling structure is provided in the tooth groove 5 and is used for rolling connection between the sprocket and the chain when they are in contact with the tooth groove 5;

[0046] The gear teeth 4 and the base body 1 are of an integrated structure.

[0047] It can be seen from this embodiment that by providing a rolling structure in the tooth groove 5 between adjacent gear teeth 4, the sliding of the chain and the sprocket when in contact in the tooth groove 5 is converted into rolling, thereby effectively reducing the wear on the tooth groove 5 and extending the service life.

[0048] Example 2:

[0049] This embodiment provides a wear-resistant driving sprocket. In addition to the technical solutions of the above embodiments, it also has the following technical features. The rolling structure includes:

[0050] The reinforcing rib 6 is mounted on the inner wall of the tooth groove 5, and an arc-shaped mounting groove 7 is formed on the inner wall surface of the tooth groove 5;

[0051] The rolling element is installed in the arc-shaped installation groove 7 and is used for rolling connection when the sprocket and the chain are in contact;

[0052] The reinforcing rib 6 and the base 1 are of an integrated structure, and the surface of the reinforcing rib 6 is arc-shaped and is adapted to the sleeve on the chain pin.

[0053] It can be seen from this embodiment that the provision of the reinforcing ribs 6 facilitates the improvement of the structural strength of the tooth groove 5 , and also facilitates the installation of the rolling element, thereby ensuring the rolling connection between the chain and the sprocket at the tooth groove 5 .

[0054] Example 3:

[0055] This embodiment provides a wear-resistant driving sprocket, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0056] The rolling element includes a plurality of first rollers 8 installed along the arc-shaped installation groove 7, and the first rollers 8 protrude from the surface of the reinforcing rib 6 along the radial direction of the base 1;

[0057] The first roller 8 protrudes from the surface of the reinforcing rib 6 by 0.5-1 mm in the radial direction of the base 1;

[0058] Meanwhile, the first roller 8 may adopt a cylindrical structure.

[0059] It can be seen from this embodiment that by installing multiple first rollers 8 in the arc-shaped mounting groove 7, it is convenient to adopt rolling connection when connecting the chain and the sprocket at the tooth groove 5, thereby improving wear resistance and extending service life. In addition, the first roller 8 protrudes from the surface of the reinforcing rib 6 by 0.5-1mm, which can avoid excessive protrusion and affecting the embedded connection of the chain in the sprocket, thereby ensuring stability.

[0060] Example 4:

[0061] This embodiment provides a wear-resistant driving sprocket. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0062] The flange 9 is located on the gear tooth 4 and is radially arranged on both sides of the end of the gear tooth 4 away from the base 1;

[0063] The surface of the flange 9 is smooth and flat, so that the sprocket can slide away from the chain smoothly after the sprocket rotates.

[0064] At the same time, the flange 9 and the gear teeth 4 can adopt an integrated structure.

[0065] It can be seen from this embodiment that the provision of the flange 9 can promote the stability of the chain in the tooth groove 5 during transmission, reducing the risk of tooth jumping and chain derailment during chain transmission, and the smooth surface of the flange 9 and the second roller 11 on the flange 9 can facilitate smooth sliding away from the chain after the sprocket rotates, avoiding jamming and improving the stability of the sprocket during transmission;

[0066] At the same time, the provision of the flange 9 can improve the structural strength and wear resistance of the gear teeth 4 and extend the service life.

[0067] Example 5:

[0068] This embodiment provides a wear-resistant driving sprocket, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0069] The flange 9 is provided with a mounting groove 10, and a second roller 11 is provided in the mounting groove 10, and the second roller 11 protrudes from the surface of the flange 9 in the radial direction of the base body 1;

[0070] The second roller 11 protrudes from the surface of the flange 9 by 0.5-1 mm in the radial direction of the base 1 .

[0071] It can be seen from this embodiment that by opening a mounting groove 10 on the flange 9 and providing a second roller 11, the relative movement between the flange 9 and the chain is also achieved by rolling, which further prevents jamming and reduces the frictional resistance between the two, making it easier for the chain to slide off the sprocket. The second roller 11 protrudes from the surface of the flange 9 by 0.5-1 mm. The small size of the protrusion can avoid affecting the chain sliding off the sprocket.

[0072] Example 6:

[0073] This embodiment provides a wear-resistant driving sprocket, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0074] The first roller 8 and the second roller 11 are both axially provided with a circular hole 12, and mounting bolts 13 passing through the circular holes 12 are respectively installed on the reinforcing rib 6 and the flange 9;

[0075] The mounting bolt 13 is clearance-fitted with the circular hole 12 .

[0076] It can be seen from this embodiment that the rotation of the first roller 8 and the second roller 11 is ensured by axially opening a circular hole 12 in the first roller 8 and the second roller 11 and by the clearance fit between the mounting bolt 13 and the circular hole 12, and the structure is simple and the installation is convenient.

[0077] Example 7:

[0078] This embodiment provides a wear-resistant driving sprocket, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0079] One end of the mounting bolt 13 is provided with an abutment head 14 for abutting against the surfaces of the reinforcing rib 6 and the flange 9 , and the other end is provided with an annular groove 15 in which a retaining ring 16 is installed.

[0080] As can be seen from this embodiment, by axially limiting the mounting bolt 13 with the retaining ring 16, the installation of the first roller 8 and the second roller 11 is facilitated, and the convenience of installing the first roller 8 and the second roller 11 is further improved.

[0081] Example 8:

[0082] This embodiment provides a wear-resistant driving sprocket, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0083] The two radial side surfaces of the gear teeth 4 along the base body 1 form working surfaces, and the flange 9 and the reinforcement rib 6 are smoothly transitioned on the working surfaces.

[0084] It can be seen from this embodiment that the flange 9 and the reinforcing rib 6 make a smooth transition on the working surface of the gear tooth 4, which can avoid affecting the transmission between the sprocket and the chain, ensure the stability of the transmission, and prevent vibration caused by jumping, thereby ensuring the stability of the transmission connection between the chain and the sprocket.

[0085] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A wear-resistant driving sprocket, characterized in that: include: A base body (1) is provided with an axial hole (2) in the axial direction, and a keyway (3) is provided on the inner wall of the axial hole (2); A plurality of gear teeth (4) are provided and arranged at equal intervals around the base (1), and tooth grooves (5) are formed between two adjacent gear teeth (4); The rolling structure is arranged in the tooth groove (5) and is used for rolling connection between the sprocket and the chain when they are in contact with the tooth groove (5).

2. The wear-resistant driving sprocket according to claim 1, characterized in that: The rolling structure includes: A reinforcing rib (6) is mounted on the inner wall of the tooth groove (5), and an arc-shaped mounting groove (7) is formed on the inner wall surface of the tooth groove (5); The rolling element is installed in the arc-shaped installation groove (7) and is used for rolling connection when the sprocket is in contact with the chain.

3. The wear-resistant driving sprocket according to claim 2, characterized in that: The rolling element comprises a plurality of first rollers (8) installed along an arc-shaped installation groove (7), and the first rollers (8) all protrude from the surface of the reinforcing rib (6) in the radial direction of the base body (1); Wherein, the first roller (8) protrudes from the surface of the reinforcing rib (6) by 0.5-1 mm in the radial direction of the base body (1).

4. The wear-resistant driving sprocket according to claim 3, characterized in that: Also includes: The flange (9) is located on the gear tooth (4) and is radially arranged on both sides of the gear tooth (4) away from the base (1); The surface of the flange (9) is a smooth plane, so that the sprocket can slide away from the chain smoothly after the sprocket rotates.

5. The wear-resistant driving sprocket according to claim 4, characterized in that: The flange (9) is provided with a mounting groove (10), and a second roller (11) is provided in the mounting groove (10), and the second roller (11) protrudes from the surface of the flange (9) in the radial direction of the base (1); The second roller (11) protrudes from the surface of the flange (9) by 0.5-1 mm in the radial direction of the base (1).

6. The wear-resistant driving sprocket according to claim 5, characterized in that: The first roller (8) and the second roller (11) are both axially provided with a circular hole (12), and mounting bolts (13) passing through the circular hole (12) are respectively installed on the reinforcing rib (6) and the flange (9); Wherein, the mounting bolt (13) is clearance-matched with the circular hole (12).

7. The wear-resistant driving sprocket according to claim 6, characterized in that: One end of the mounting bolt (13) is provided with an abutment joint (14) for abutting against the reinforcing rib (6) and the surface of the flange (9), and the other end is provided with an annular groove (15), and a retaining ring (16) is installed in the annular groove (15).

8. The wear-resistant driving sprocket according to claim 4, characterized in that: The gear teeth (4) form working surfaces along the two radial side surfaces of the base (1), and the flange (9) and the reinforcing rib (6) smoothly transition on the working surfaces.

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