Miniature roller chain

Abstract

A miniature roller chain relates to the technical field of chain transmission systems, comprises a roller chain body, the roller chain body comprises an outer chain plate, an inner chain plate, a sleeve, a roller and a pin shaft, and is characterized in that a self-lubricating mechanism I is arranged between opposite surfaces of the outer chain plate and the inner chain plate, a self-lubricating mechanism II is arranged on the sleeve, and the pin shaft is of a waist drum-shaped structure with two reducing ends. By introducing the self-lubricating sleeve, the self-lubricating effect of a chain system can be dynamically achieved, and the problem that regular maintenance is needed between the sleeve and the pin shaft and between the sleeve and the roller is solved. Meanwhile, by arranging the self-lubricating gaskets, abrasion between the inner chain plates and the outer chain plates can be greatly reduced, and the maintenance-free effect is further improved. According to the miniature roller chain, the waist-drum-shaped pin shaft is designed, the matching precision of a hinge pair between the pin shaft and the sleeve is effectively improved, the risk of serious local abrasion of parts is reduced, and meanwhile the operation stability of the whole chain system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chain transmission systems, in particular to a micro roller chain. Background Art

[0002] Chain drive is an important type of transmission in mechanical transmission. Compared with other transmission mechanisms, chain drive has high load-bearing capacity, high efficiency, and is suitable for long-distance transmission, especially for stable operation in harsh environments.

[0003] In recent years, with the rise of high-end manufacturing, future industries (such as humanoid robots), high-end medical care, new energy and other industries have developed rapidly, especially in "high", "precision" and "advanced" related equipment or products. This requires the development of more precise, smaller and maintenance-free high-end chain systems to meet market demand.

[0004] However, the smallest chain model currently developed by the chain drive industry is 03C. In addition to its size being far from meeting the actual needs of these fields, the most prominent problem is that conventional chains require regular maintenance, otherwise the operating stability and service life of the chain system cannot be guaranteed, which is unacceptable for some high-end equipment. Utility Model Content

[0005] This novel invention discloses a micro roller chain. The pin adopts a waist drum-shaped structure, which can compensate for the diameter shrinkage caused by the sleeve being pressed into the inner chain plate due to interference fit, greatly improving the matching accuracy between the pin and the sleeve and the stability of the chain system operation. The sleeve innovatively introduces a self-lubricating solution, which solves the disadvantage of conventional chains requiring regular maintenance and achieves a maintenance-free chain effect.

[0006] In order to achieve the above purpose, the technical solution of this novel invention is:

[0007] A miniature roller chain includes a roller chain body, wherein the roller chain body includes an outer link plate, an inner link plate, a sleeve, a roller, and a pin. A self-lubricating mechanism 1 is provided between the opposing surfaces of the outer link plate and the inner link plate, a self-lubricating mechanism 2 is provided on the sleeve, and the pin is a waist drum-shaped structure with reduced diameters at both ends.

[0008] Preferably, two opposing outer link plates are connected to form outer chain links by two pins, and the two ends of the pins are interference fit with the connecting holes of the corresponding outer link plates respectively. Two sleeves are connected between the two opposing inner link plates, and the two ends of the two sleeves are interference fit with the connecting holes of the corresponding inner link plates respectively. Rollers are fitted in the gap outside the sleeves. The inner link plates, sleeves, and rollers together constitute the inner chain links. The outer chain links and the inner chain links are alternately connected to form the roller chain body, and the pins pass through the sleeves of adjacent inner chain links and fit in the sleeve gap.

[0009] Preferably, the self-lubricating mechanism is a self-lubricating gasket, which is sleeved outside the pin shaft between the inner link plate and the outer link plate.

[0010] Preferably, the self-lubricating gasket is made of SF-1 three-layer composite material or nylon graphite material.

[0011] Preferably, the second self-lubricating mechanism includes a mounting hole that radially passes through the outer wall of the sleeve, and graphite particles are installed in the mounting hole.

[0012] Preferably, there are one or more mounting holes. When there are multiple mounting holes, the multiple mounting holes are arranged along the axial direction of the sleeve.

[0013] Preferably, when the chain is assembled, the mounting hole is located on the side facing the direction of travel of the chain and the axis of the mounting hole is parallel to the line connecting the center of the chain holes.

[0014] Preferably, the middle diameter D and the two end diameters d of the pin shaft satisfy the relationship: D=(1.02%-1.03%)*d.

[0015] Preferably, the pitch p of the roller chain body is less than 4.7625 mm.

[0016] Preferably, the diameter d' of the mounting hole and the outer diameter D' of the sleeve satisfy the relationship: d'≤π*D / 20.

[0017] The beneficial effects of this new type of micro roller chain:

[0018] This new type of chain proposes a self-lubricating solution. By introducing a self-lubricating sleeve, the chain system can dynamically achieve self-lubricating effects, solving the problem of regular maintenance between the sleeve and the pin, and between the sleeve and the roller, greatly reducing the wear between the various components and increasing the service life of the chain. At the same time, by providing a self-lubricating gasket, the wear between the inner and outer link plates can be greatly reduced, further improving the maintenance-free effect. The size of this new type of chain meets the use requirements of most existing technologies in the high-end manufacturing industry. For micro roller chains, a waist drum-shaped pin is designed, which effectively improves the matching accuracy of the hinge pair between the pin and the sleeve, reduces the risk of severe local wear of parts, and at the same time improves the operational stability of the entire chain system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments, which constitute a part of the specification and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention.

[0020] Figure 1 It is a three-dimensional structural diagram of a micro roller chain;

[0021] Figure 2 It is a schematic diagram of the pin structure;

[0022] Figure 3 It is a schematic diagram of the sleeve structure;

[0023] 1. Outer link plate; 2. Inner link plate; 3. Sleeve; 4. Roller; 5. Pin; 6. Self-lubricating gasket. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] The following embodiments may be understood as explaining a local structure of the present invention individually, or may be understood as explaining a larger structure of the present invention through a combination of multiple embodiments.

[0026] Example 1

[0027] A miniature roller chain, Figure 1 As shown, it includes a roller chain body, which includes an outer link plate 1, an inner link plate 2, a sleeve 3, a roller 4, and a pin 5. The specific structure and assembly method of the roller chain body can refer to the existing technology, except that: a self-lubricating mechanism 1 is provided between the opposite surfaces of the outer link plate 1 and the inner link plate 2, and its self-lubricating method can be any form disclosed in the existing technology that can achieve a self-lubricating effect between the inner and outer chain plates; a self-lubricating mechanism 2 is provided on the sleeve 3, and its self-lubricating method can be any form disclosed in the existing technology that can achieve a self-lubricating effect between the sleeve and the pin, and between the sleeve and the roller; the pin is a waist-drum-shaped structure with reduced diameter at both ends. Since a reduction effect will occur when the two ends of the sleeve are interference-fitted with the inner link plate, the new type sets the pin to a waist-drum-shaped structure with reduced diameter at both ends, which can better cooperate with the two ends of the sleeve, improve the stability of the roller chain body, and avoid excessive wear of the sleeve and the pin ends.

[0028] Example 2

[0029] like Figure 1As shown, two opposing outer link plates 1 are connected to form outer chain links through two pins 5, and the two ends of the pins 5 are interference fit with the connecting holes of the corresponding outer link plates 1 respectively. Two sleeves 3 are connected between the two opposing inner link plates 2, and the two ends of the sleeves 3 are interference fit with the connecting holes of the corresponding inner link plates 2 respectively. Rollers 4 are fitted in the outer clearance of the sleeves 3. The inner link plates 2, sleeves 3, and rollers 4 together constitute the inner chain links. The outer chain links and the inner chain links are alternately connected to form the roller chain body. The pins 5 pass through the sleeves 3 of adjacent inner chain links and are clearance fit with the sleeves 3.

[0030] This embodiment provides an assembly form of a roller chain body.

[0031] Example 3

[0032] like Figure 1 As shown, the self-lubricating mechanism 1 is a self-lubricating gasket 6, which is sleeved outside the pin shaft 5 between the inner link plate 2 and the outer link plate 1.

[0033] like Figure 1 As shown, the self-lubricating gasket 6 is made of SF-1 three-layer composite material or nylon graphite material.

[0034] Example 4

[0035] like Figure 1 、 3 As shown, the second self-lubricating mechanism includes a mounting hole that radially passes through the outer wall of the sleeve 3, and graphite particles are installed in the mounting hole.

[0036] like Figure 1 、 3 As shown, there are one or more mounting holes. When there are multiple mounting holes, the multiple mounting holes are arranged along the axial direction of the sleeve 3.

[0037] like Figure 1 As shown, when the chain is assembled, the mounting hole is located on the side facing the chain travel direction and the axis of the mounting hole is parallel to the line connecting the chain hole centers.

[0038] Example 5

[0039] like Figure 1 、 2 As shown, the middle diameter D and the two end diameters d of the pin shaft 5 satisfy the relationship: D = (1.02% to 1.03%) * d.

[0040] like Figure 1 As shown, the pitch p of the roller chain body is less than 4.7625 mm.

[0041] Example 6

[0042] like Figure 3As shown, the diameter d' of the mounting hole and the outer diameter D' of the sleeve satisfy the relationship: d'≤π*D / 20.

Claims

1. A miniature roller chain comprising a roller chain body, wherein the roller chain body comprises an outer link plate, an inner link plate, a sleeve, a roller, and a pin, and is characterized by: A self-lubricating mechanism 1 is provided between the opposite surfaces of the outer link plate and the inner link plate, a self-lubricating mechanism 2 is provided on the sleeve, and the pin shaft is a waist drum-shaped structure with reduced diameters at both ends.

2. A miniature roller chain according to claim 1, characterized in that: Two opposing outer link plates are connected to form outer chain links through two pins, and the two ends of the pins are interference fit with the connecting holes of the corresponding outer link plates respectively. Two sleeves are connected between the two opposing inner link plates, and the two ends of the two sleeves are interference fit with the connecting holes of the corresponding inner link plates respectively. Rollers are fitted in the gap outside the sleeves. The inner link plates, sleeves, and rollers together constitute the inner chain links. The outer chain links and the inner chain links are alternately connected to form the roller chain body. The pins pass through the sleeves of adjacent inner chain links and fit in the sleeve gap.

3. A miniature roller chain according to claim 1 or 2, characterized in that: The first self-lubricating mechanism is a self-lubricating gasket, which is sleeved outside the pin shaft between the inner link plate and the outer link plate.

4. A miniature roller chain according to claim 3, characterized in that: The self-lubricating gasket is made of SF-1 three-layer composite material or nylon graphite material.

5. A micro roller chain according to claim 1 or 2, characterized in that: the second self-lubricating mechanism includes a mounting hole that radially passes through the outer wall of the sleeve, and graphite particles are installed in the mounting hole.

6. A miniature roller chain according to claim 5, characterized in that: There are one or more mounting holes. When there are multiple mounting holes, the multiple mounting holes are arranged along the axial direction of the sleeve.

7. A micro roller chain as claimed in claim 6, characterized in that: when the chain is assembled, the mounting hole is located on the side facing the direction of chain travel and the axis of the mounting hole is parallel to the line connecting the chain hole centers.

8. A miniature roller chain according to claim 1, characterized in that: The middle diameter D and the two end diameters d of the pin shaft satisfy the relationship: D=(1.02%-1.03%)*d.

9. A miniature roller chain according to claim 1, characterized in that: The pitch p of the roller chain body is less than 4.7625 mm.

10. A miniature roller chain according to claim 5, characterized in that: The diameter d' of the mounting hole and the outer diameter D' of the sleeve satisfy the relationship: d'≤π*D / 20.

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