Sealed oil storage chain

Abstract

The utility model discloses a sealed oil storage chain which comprises a plurality of inner chain links, a plurality of outer chain pieces, pin shafts, rollers and sealing rings, the inner chain links are sequentially connected end to end through the outer chain pieces, the inner chain links and the outer chain pieces are rotationally connected through the pin shafts, each inner chain link comprises two inner chain pieces which are arranged in a bilateral symmetry mode, and the rollers are arranged on the inner chain pieces. The rollers are arranged on the outer side walls, penetrating through the boss structures of the pin shaft, of the two inner chain pieces in a sleeving mode and can rotate between the two inner chain pieces, annular sealing grooves are formed in the upper end face and the lower end face, making contact with the inner chain pieces, of each roller, and the sealing rings are arranged in the two annular sealing grooves of each roller and make close contact with the inner side walls of the two inner chain pieces respectively. The sealing ring located in the annular sealing groove of the roller can prevent oil in the chain from seeping out and can prevent impurities such as silt in the external environment from entering the roller, so that abrasion of the chain is prevented from being aggravated, the abrasion resistance of the chain is effectively improved, and the service life of the chain is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle chains, and more specifically to a sealed oil storage chain. Background Art

[0002] Chains are widely used in industrial and agricultural production and people's daily life, such as bicycle chains, transmission chains of automation equipment, etc. Chain transmission is a transmission method that transmits the movement and power of a driving sprocket with a toothed structure to another driven sprocket with a toothed structure through a chain. Most of the chains on the market are open chains. For example, utility model publication number CN201391575Y discloses a high-strength roller chain, which includes an outer chain plate, an inner chain plate, and a pin shaft. The pin shaft is sleeved with a sleeve, and the sleeve is sleeved with a roller. The roller chain of this patent is an open chain, which is easy to leak oil and has poor dustproof effect during use. External mud and sand can easily enter the interior of the chain through the gap between the connecting structures to accelerate the wear of the chain. After wear, the gap between the connecting structures becomes larger, which aggravates the impact, easily causes tooth skipping or chain derailment, and produces obvious noise, thereby affecting the use effect of the chain and shortening the service life of the chain. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and to provide a sealed oil storage chain which can prevent oil leakage from the inside of the chain and can also prevent impurities such as mud and sand in the external environment from entering the rollers, thereby avoiding aggravated wear of the chain, effectively improving the wear resistance of the chain, and further extending the service life of the chain.

[0004] To achieve the above-mentioned purpose, the utility model provides a sealed oil storage chain, including a plurality of inner chain links, a plurality of outer chain plates, a pin shaft, a roller, and a sealing ring. The inner chain links are connected end to end in sequence through the outer chain plates, and the inner chain links and the outer chain plates are rotatably connected through the pin shaft. Each inner chain link includes two inner chain plates, and the two inner chain plates are symmetrically arranged. The rollers are sleeved on the outer side walls of the boss structures of the two inner chain plates passing through the pin shaft and can rotate between the two inner chain plates. The upper and lower end surfaces of the rollers in contact with the inner chain plates are provided with annular sealing grooves, and the sealing rings are arranged in the two annular sealing grooves of the rollers and are in close contact with the inner side walls of the two inner chain plates respectively.

[0005] Preferably, an axial hole is provided through the middle of the roller, and the middle parts of the inner end surfaces of the two annular sealing grooves are respectively connected to the axial holes.

[0006] Preferably, a rounded structure is provided between the inner side surface and the inner end surface of the annular sealing groove.

[0007] Preferably, the outer corners of the sealing ring in contact with the rounded structure of the annular sealing groove are arranged as rounded transitions.

[0008] Preferably, first pin shaft through holes for inserting pin shafts are formed at both ends of the outer link plates, and second pin shaft through holes having the same aperture as the first pin shaft through holes are formed at both ends of the inner link plates.

[0009] Preferably, the outer chain plates are arranged bilaterally symmetrically and are rotatably connected between two adjacent inner chain links via a pin shaft.

[0010] Preferably, upper and lower edges at both ends of the outer side surface of each outer link are symmetrically provided with chamfered structures.

[0011] Preferably, the pin shaft is configured as a hollow shaft to reduce the weight of the chain.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model has a simple and novel structure and a reasonable design. The utility model is provided with an inner chain link, an inner chain plate, an outer chain plate, a pin shaft, a roller and a sealing ring. The rollers are sleeved on the outer side walls of the boss structures of the two inner chain plates passing through the pin shafts. An annular sealing groove for inserting the sealing ring is provided on the upper and lower end surfaces where the rollers contact the inner chain plates. The sealing rings are in close contact with the inner side walls of the two inner chain plates respectively, so that oil inside the chain can be prevented from seeping out and impurities such as mud and sand in the external environment can be prevented from entering into the rollers, thereby avoiding aggravating the wear of the chain, effectively improving the wear resistance of the chain and further extending the service life of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a structural schematic diagram of a sealed oil storage chain provided by an embodiment of the utility model;

[0016] Figure 2 It is a partial cross-sectional schematic diagram of a sealed oil storage chain provided by an embodiment of the utility model;

[0017] Figure 3 It is an enlarged schematic diagram of a cross section of a sealed oil storage chain provided by an embodiment of the utility model;

[0018] Figure 4It is a structural schematic diagram of a roller of a sealed oil storage chain provided by an embodiment of the utility model;

[0019] Figure 5 It is a cross-sectional schematic diagram of a roller of a sealed oil storage chain provided by an embodiment of the utility model;

[0020] Figure 6 It is a cross-sectional schematic diagram of a sealing ring of a sealed oil storage chain provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Please refer to Figure 1 The embodiment of the utility model provides a sealed oil storage chain, including a plurality of inner chain links 1, a plurality of outer chain plates 2, a pin shaft 3, a roller 4, and a sealing ring 5. The various components of this embodiment are described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the inner chain links 1 can be connected end to end in sequence through the outer chain plates 2, and the inner chain links 1 and the outer chain plates 2 are rotatably connected through the pin shaft 3. Each inner chain link 1 includes two inner chain plates 11, and the two inner chain plates 11 are symmetrically arranged. The rollers 4 are sleeved on the outer side walls of the boss structures 111 of the two inner chain plates 11 passing through the pin shaft 3 and can rotate between the two inner chain plates 11.

[0024] Specifically, the outer chain plates 2 can be arranged bilaterally symmetrically and rotatably connected between two adjacent inner chain links 1 through the pin shaft 3 .

[0025] Preferably, the upper and lower edges of the two ends of the outer side surface of each outer link plate 2 can be symmetrically provided with chamfer structures 22. The chamfer structures 22 can reduce the noise of friction between the chain and the flywheel when the chain is shifting up and down, and can make the bicycle shifting up and down more smoothly, and can be compatible with various speed change systems, and at the same time, better match the meshing with the transmission system.

[0026] In an optional embodiment, the pin shaft 3 can be configured as a hollow shaft.

[0027] Among them, the pin 3 adopts a hollow shaft, which can effectively reduce the weight of the chain, so that the chain can achieve a good effect in increasing the transmission speed. In addition, the hollow structure can make the chain throw out mud and the like due to centrifugal action when the bicycle is riding on bad road conditions, effectively reducing the wear of the chain.

[0028] The two ends of the outer link 2 may be provided with first pin shaft through holes 21 for inserting the pin shaft 3 , and the two ends of the inner link 11 may be provided with second pin shaft through holes 12 with the same aperture as the first pin shaft through holes 21 .

[0029] like Figure 3 As shown, the upper and lower end surfaces of the roller 4 in contact with the inner link plate 11 may be provided with annular sealing grooves 41 , and the sealing rings 5 ​​are arranged in the two annular sealing grooves 41 of the roller 4 and are in close contact with the inner side walls of the two inner link plates 11 respectively.

[0030] In this embodiment, lubricating oil is stored between the gap between the boss structure 111 of the two inner link plates 11 and the outer wall surface of the pin shaft 3, and the lubricating oil can lubricate the pin shaft 3. The roller 4 is sleeved on the outer side walls of the two opposite boss structures 111, and the lubricating oil is sealed by the sealing ring 5 to prevent it from leaking out from the inside of the chain.

[0031] like Figure 4 As shown, an axial hole 42 may be formed through the middle of the roller 4 , and the middle parts of the inner end surfaces of the two annular sealing grooves 41 are respectively connected to the axial hole 42 .

[0032] like Figure 5 As shown, in this embodiment, a rounded structure 43 may be provided between the inner side surface and the inner end surface of the annular sealing groove 41 .

[0033] like Figure 6 As shown, corresponding to the annular sealing groove 41 of the roller 4 , the corner of one side of the sealing ring 5 that contacts the rounded structure 43 of the annular sealing groove 41 can be set as a rounded transition 51 .

[0034] The annular sealing groove 41 and the sealing ring 5 both have rounded corners, which enhances the sealing performance between the sealing ring 5 and the roller 4 and the inner wall of the inner chain plate 11 and prevents the sealing ring 5 from deviating and slipping in the annular sealing groove 41 .

[0035] To sum up, the rollers of the utility model are sleeved on the outer side walls of the boss structures of the two inner chain plates passing through the pin shafts, and annular sealing grooves for sealing rings to be placed are provided on the upper and lower end surfaces where the rollers contact the inner chain plates. The sealing rings are in close contact with the inner side walls of the two inner chain plates respectively, which can prevent the oil inside the chain from leaking out, and can also prevent impurities such as mud and sand in the external environment from entering the rollers, thereby avoiding aggravating the wear of the chain, effectively improving the wear resistance of the chain, and further extending the service life of the chain.

[0036] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A sealed oil storage chain, characterized in that: The invention comprises a plurality of inner chain links (1), a plurality of outer chain plates (2), a pin shaft (3), a roller (4) and a sealing ring (5); the inner chain links (1) are connected end to end in sequence through the outer chain plates (2); the inner chain links (1) and the outer chain plates (2) are connected in rotation through the pin shaft (3); each inner chain link (1) comprises two inner chain plates (11); the two inner chain plates (11) are arranged symmetrically; the rollers (4) are sleeved on the outer side walls of boss structures (111) of the two inner chain plates (11) passing through the pin shaft (3) and can rotate between the two inner chain plates (11); the upper and lower end surfaces of the rollers (4) in contact with the inner chain plates (11) are provided with an annular sealing groove (41); the sealing rings (5) are arranged in the two annular sealing grooves (41) of the rollers (4) and are in close contact with the inner side walls of the two inner chain plates (11) respectively.

2. A sealed oil storage chain according to claim 1, characterized in that: An axial hole (42) is provided through the middle of the roller (4), and the middle parts of the inner end surfaces of the two annular sealing grooves (41) are respectively connected to the axial hole (42).

3. A sealed oil storage chain according to claim 1, characterized in that: A rounded structure (43) is provided between the inner side surface and the inner end surface of the annular sealing groove (41).

4. A sealed oil storage chain according to claim 3, characterized in that: The corner of one side of the sealing ring (5) that contacts the rounded corner structure (43) of the annular sealing groove (41) is arranged as a rounded corner transition (51).

5. A sealed oil storage chain according to claim 1, characterized in that: The two ends of the outer link (2) are provided with first pin shaft through holes (21) for inserting the pin shaft (3), and the two ends of the inner link (11) are provided with second pin shaft through holes (12) with the same hole diameter as the first pin shaft through holes (21).

6. A sealed oil storage chain according to claim 1, characterized in that: The outer chain pieces (2) are respectively arranged in a bilaterally symmetrical manner and are rotatably connected between two adjacent inner chain links (1) via a pin shaft (3).

7. A sealed oil storage chain according to claim 1, characterized in that: The upper and lower edges at both ends of the outer side surface of each outer link piece (2) are symmetrically provided with chamfer structures (22).

8. A sealed oil storage chain according to claim 1, characterized in that: The pin shaft (3) is configured as a hollow shaft.

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