Wear-resistant short-pitch precise roller chain

Abstract

The utility model discloses a wear-resistant short-pitch precise roller chain, which comprises an outer chain plate and an inner chain plate which are connected through a pin shaft, a sleeve and a roller are sleeved outside the pin shaft, and the inner chain plate is positioned between the sleeve and the outer chain plate. The pin shaft is provided with a channel, an injection hole communicated with the channel is formed in the end, a lubricating hole is formed in the wall face, and the injection hole is matched with a sealing plug. The pin shaft comprises a first shaft body and a second shaft body which are connected through threads, an annular groove is formed in the outer wall, and a rubber ring is embedded in the annular groove. The air bag is arranged in the channel, a corrugated pipe telescopic structure is adopted, and the air bag can stretch towards the two ends when heated and contract when the temperature is lowered, so that the lubricating grease pressure is automatically adjusted. A filter screen is arranged on the inner wall of the channel to filter impurities in the lubricating grease. And the sealing plug is provided with a sealing cover which is sleeved at the end part of the sleeve to prevent external pollution. According to the roller chain, a lubricating system is improved, so that abrasion caused by poor lubrication is reduced.

Description

Technical Field

[0001] The utility model relates to the field of roller chains, in particular to a wear-resistant short-pitch precision roller chain. Background Art

[0002] Roller chain is a type of chain widely used in mechanical transmission systems, usually for transmitting power and motion. Its basic structure consists of inner link plates, outer link plates, pins, sleeves and rollers. The main advantages of roller chains include high transmission efficiency, smooth operation, and strong load-bearing capacity, so they are widely used in industries such as industry, agriculture, transportation, and machinery manufacturing. However, as modern industry's requirements for transmission system accuracy and reliability continue to increase, the shortcomings of traditional roller chains in some specific applications have gradually emerged, mainly in the form of wear.

[0003] Wear and elongation is one of the main failure modes of roller chains. During the operation of roller chains, the rollers of the chain and the teeth of the sprocket are mainly rolling friction, while the pins and sleeves of the chain are mainly sliding friction. Therefore, the wear between the pins and sleeves is the main cause of wear and elongation of roller chains. Ordinary roller chains are mostly open transmission, and open transmission roller chains are mostly lubricated with grease. The grease can adhere to the surface of the pin and sleeve friction pair to provide lubrication for the pin and sleeve, but it is inconvenient to supply and change grease. When the grease is continuously lost, the lubrication effect becomes weaker and weaker, and the wear will become faster and faster. The chain without lubrication will soon wear out and fail.

[0004] Therefore, it is particularly important to develop a wear-resistant short-pitch precision roller chain that is convenient for grease supply and replacement. Utility Model Content

[0005] The utility model aims to provide a wear-resistant short-pitch precision roller chain, which can be conveniently supplied with grease and replaced with grease.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problem is: a wear-resistant short-pitch precision roller chain, including an outer link plate and an inner link plate, the outer link plate and the inner link plate are connected by a pin shaft, the outer sleeve of the pin shaft is provided with a sleeve and a roller, the inner link plate is located between the sleeve and the outer link plate, the pin shaft is provided with a channel, the end of the pin shaft is provided with an injection hole communicating with the channel, the wall surface of the pin shaft is provided with a lubrication hole, and the injection hole is adapted to be equipped with a sealing plug.

[0007] Preferably, the pin shaft comprises a first shaft body and a second shaft body, and the first shaft body and the second shaft body are connected via threads.

[0008] Preferably: an annular groove is formed on the outer wall of the pin shaft, and an apron is embedded in the annular groove.

[0009] Preferably, an air bag is arranged in the channel.

[0010] Preferably: a filter screen is arranged on the inner wall of the channel.

[0011] Preferably, the sealing plug is provided with a sealing cover, which is sleeved on the end of the sleeve.

[0012] Compared with the prior art, the utility model has the following advantages and effects:

[0013] The utility model realizes the continuous and uniform supply of grease through the design of built-in channels and lubrication holes, reduces the wear rate of the roller chain, and prolongs the service life. The split design of the pin shaft and the sealing plug of the injection hole make it easy to add and replace the grease, reducing maintenance costs. The combination of the ring groove and the rubber ring reduces the vibration caused by the polygon effect and the meshing impact, and improves the stability of the roller chain. The bellows telescopic structure of the airbag automatically adjusts the pressure of the grease according to temperature changes to ensure effective lubrication under different working conditions. The filter on the inner wall of the channel effectively filters impurities in the grease, avoiding additional wear on the friction pair surface and clogging of the lubrication hole. The design of the sealing plug and the cover prevents external contaminants from entering the interior of the pin shaft, protecting the purity of the grease. In summary, the wear-resistant short-pitch precision roller chain of the utility model simplifies the maintenance process while improving the transmission efficiency and reliability, providing users with a cost-effective and efficient solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a wear-resistant short-pitch precision roller chain according to an embodiment of the utility model.

[0015] Figure 2 It is a structural schematic diagram of a pin shaft in an embodiment of the utility model.

[0016] Figure 3 This utility model embodiment Figure 1 Sectional view of AA.

[0017] Figure numbers: outer link plate 1, inner link plate 2, pin shaft 3, first shaft body 31, second shaft body 32, channel 33, injection hole 34, lubrication hole 35, annular groove 36, sleeve 41, roller 42, sealing plug 5, sealing cover 51, rubber ring 61, sealing ring 62, airbag 7, filter screen 8. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0019] Example: See Figure 1 - Figure 3In the present embodiment, a wear-resistant short-pitch precision roller chain is involved, which is specifically used in engineering machinery, agricultural machinery, forestry and papermaking, logistics and transportation industries, metallurgical industries, food industries, health and medicine industries and other fields. These fields usually require the chain to have high tensile strength and high fatigue strength, and to be able to operate reliably in complex working environments. Specifically, it includes: an outer link plate 1 and an inner link plate 2, the outer link plate 1 and the inner link plate 2 are connected by a pin shaft 3, the outer sleeve of the pin shaft 3 is provided with a sleeve and a roller 4, the inner link plate 2 is located between the sleeve 41 and the outer link plate 1, the pin shaft 3 is provided with a channel 33, the end of the pin shaft 3 is provided with an injection hole 34 communicating with the channel 33, the wall surface of the pin shaft 3 is provided with a lubrication hole 35, and the injection hole 34 is adapted to be equipped with a sealing plug 5.

[0020] Specifically, in this embodiment, the channel 33 inside the pin 3 is designed for the storage and transportation of grease, and the grease is added through the injection hole 34, and the injection hole 34 is blocked by the sealing plug 5 after the injection is completed. The wall surface of the pin 3 is provided with a plurality of lubrication holes 35, and the lubrication holes 35 are connected with the channel 33. The temperature of the roller chain rises during use, so that the grease in the channel 33 melts due to heat and overflows from the lubrication holes 35, so that it is distributed on the sliding friction pair surface between the pin 3 and the sleeve 41, thereby reducing the wear rate and extending the service life of the roller chain. In this embodiment, sealing rings 62 are provided on both sides of the mating surface of the pin 3 and the sleeve 41. When the roller chain stops using, the temperature decreases, and the grease flows back from the lubrication hole 35 to the channel 33 for subsequent use. Through the structural coordination of the above-mentioned technical features, the wear-resistant short-pitch precision roller chain of this embodiment reduces the wear caused by poor lubrication by improving the lubrication system, thereby improving the transmission efficiency and reliability of the roller chain. In addition, the design simplifies maintenance as users can add grease more easily, reducing maintenance costs.

[0021] See also Figure 2 In this embodiment, the pin 3 includes a first shaft body 31 and a second shaft body 32, and the first shaft body 31 is connected to the second shaft body 32 by threads. The threaded connection design between the first shaft body 31 and the second shaft body 32 makes it easier to assemble and disassemble the pin 3, and the split design makes it easier to clean the inside of the pin 3 and replace the grease. During the use of the roller chain, there is a phenomenon of eccentric wear (the sprocket generates a circumferential force on the sleeve 41, so that the wear degree of one side of the pin 3 is greater than the wear degree of the other side), and the entire chain needs to be replaced. The split design can replace the worn shaft body (the first shaft body 31 or the second shaft body 32) separately, and the service life of the entire roller chain is extended, reducing the need and cost of overall replacement.

[0022] The outer wall of the pin 3 is provided with an annular groove 36, and a rubber ring 61 is embedded in the annular groove 36. The elastic characteristics of the rubber ring 61 are used to absorb and alleviate the longitudinal and lateral vibrations caused by the polygonal effect and the meshing impact. The design of the annular groove 36 limits the movement of the rubber ring 61 along the axial direction, so that it can only rotate around the center of the plug-in sleeve. This movement mode effectively reduces the impact of vibration on the entire system. In addition, there is no direct contact between the pin 3 and the sleeve 41, but an indirect connection is achieved through the rubber ring 61. This indirect contact mode significantly reduces the wear of the pin 3 and the sleeve 41 during use, thereby extending the service life of the roller chain and ensuring the stability and reliability of the roller chain. The above-mentioned structural features not only improve the wear resistance of the roller chain, but also enhance its durability under high-load working conditions, providing strong support for the technological progress and application expansion of the roller chain.

[0023] An airbag 7 is arranged in the passage 33. The airbag 7 adopts a bellows telescopic structure, which can stretch to both ends when heated and shrink when the temperature drops. When the temperature rises, the airbag 7 expands due to the heat and stretches to both ends. This action pushes the grease in the passage 33 to the lubrication hole 35. When the temperature drops, the airbag 7 shrinks, and the grease flows back to the passage 33 from the sliding friction pair surface between the pin 3 and the sleeve 41 through the lubrication hole 35. It ensures that the pressure of the grease in the passage 33 of the pin 3 is always maintained within an ideal range, and can remain stable even in an environment with temperature fluctuations, so that the roller chain always gets the right amount of lubrication under different working conditions, reducing wear.

[0024] A filter 8 is provided on the inner wall of the channel 33. The design of the filter 8 effectively filters out particles, dust and other impurities in the grease, prevents the particles from wearing the friction pair surface, and avoids the clogging of the lubrication hole 35, so as to improve the reliability and service life of the roller chain.

[0025] In this embodiment, the sealing plug 5 is provided with a sealing cover 51, which is sleeved on the end of the sleeve 41. The sealing plug 5 is made of rubber or other elastic materials, and is located at the end of the roller chain to prevent dust, moisture, impurities, etc. from entering the pin 3 to contaminate the grease. By wrapping the sealing cover 51 on the end of the sleeve 41, the phenomenon of grease being thrown out due to the falling off of the sealing plug 5 during the use of the roller chain is effectively avoided, the lubrication effect is maintained, and the wear resistance is ensured.

[0026] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. A wear-resistant short pitch precision roller chain, comprising an outer link plate and an inner link plate, wherein the outer link plate and the inner link plate are connected by a pin shaft, wherein a sleeve and a roller are disposed on the outer pin shaft, and the inner link plate is located between the sleeve and the outer link plate, and characterized in that: The pin shaft is provided with a channel, the end of the pin shaft is provided with an injection hole communicated with the channel, the wall surface of the pin shaft is provided with a lubrication hole, and the injection hole is adapted to be equipped with a sealing plug.

2. A wear-resistant short pitch precision roller chain according to claim 1, characterized in that: The pin shaft comprises a first shaft body and a second shaft body, and the first shaft body and the second shaft body are connected via threads.

3. A wear-resistant short pitch precision roller chain according to claim 2, characterized in that: The outer wall of the pin shaft is provided with an annular groove, and a rubber ring is embedded in the annular groove.

4. A wear-resistant short pitch precision roller chain according to claim 3, characterized in that: An air bag is arranged in the passage.

5. A wear-resistant short pitch precision roller chain according to claim 4, characterized in that: A filter screen is arranged on the inner wall of the channel.

6. A wear-resistant short pitch precision roller chain according to claim 5, characterized in that: The sealing plug is provided with a sealing cover which is sleeved on the end of the sleeve.

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