Double-row roller chain
By designing a double-row roller chain structure with outer and inner links, and utilizing components such as buffer springs and rolling balls, the problem of roller cracking caused by thermal expansion and contraction was solved, thereby improving the chain's service life and rotation efficiency.
Patent Information
- Application Number
- CN202520313134.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Double-row roller chains may crack due to internal stress caused by thermal expansion and contraction in high-temperature environments, affecting the normal use of the chain.
A double-row roller chain structure was designed, consisting of outer links and inner links. The outer link consists of an outer link plate, a connecting pin, and a connecting chain plate. The inner link consists of a sleeve, rollers, an inner link plate, a fixed half ring, and a buffer spring. The connection of the buffer spring and the fixing nut prevents the rollers from generating internal stress due to thermal expansion and contraction. The inner link reduces frictional resistance and improves rotational efficiency through the use of rolling balls and return springs.
It effectively prevents the rollers from cracking due to thermal expansion and contraction, reduces frictional resistance, and improves the service life and rotation efficiency of the chain.
Smart Images
Figure CN223725296U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to chain transmission equipment technical field, concretely relates to a double row roller chain. BACKGROUND
[0002] Chain is a kind of mechanical transmission element connected by multiple metal rings or annular objects, widely used in various mechanical equipment, especially in occasions requiring accurate transmission ratio and high efficiency, such as bicycles and motorcycles, industrial machinery, agricultural machinery, etc.;
[0003] According to the number of rows, chain can be divided into single row chain, double row chain and multi-row chain;According to the structure, chain can be divided into roller chain, sleeve chain, etc.;Among them, double row roller chain is composed of two rows of parallel roller chains, compared with ordinary single row chain, double row design makes the chain can bear greater load, and double row structure makes the chain more stable in transmission process;
[0004] However, in actual use, since the double row roller chain is made of metal, the rollers of the double row roller chain will expand in high temperature environment, and will shrink when the temperature decreases, which will produce internal stress in the process of repeated thermal expansion and contraction, once the stress exceeds the bearing limit of the roller, the roller will crack, which will affect the normal use of the chain, therefore, a double row roller chain is needed to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a double row roller chain to solve the problems in the background art.
[0006] To achieve the above object, the utility model provides the following technical scheme: a double row roller chain, comprising:
[0007] The outer chain link comprises an outer chain plate, a connecting pin shaft and a connecting chain plate, the connecting pin shaft and the outer chain plate are provided with multiple pairs, each pair of the outer chain plate is detachably mounted at both ends of each pair of the connecting pin shaft, and the connecting chain plate is fixedly connected to the end of each pair of the connecting pin shaft away from the outer chain plate;
[0008] The inner chain link comprises a sleeve, a roller, inner chain plates, fixed half rings, fixed nuts and buffer springs, the inner chain plates are provided in pairs, each pair of the inner chain plates is mounted at both ends of the sleeve, the roller is rotatably sleeved on the sleeve, the connecting pin shaft is inserted into the sleeve, the roller comprises a plurality of roller pieces, the side surfaces of the plurality of roller pieces are in close contact with each other, the roller has mounting grooves at adjacent side surfaces of the plurality of roller pieces, both ends of the buffer spring are connected to the inner walls of the mounting grooves on two adjacent roller pieces, each group of the fixed half rings is provided with two fixed half rings, the two fixed half rings are in close contact with each other on the outer wall of the roller, and the fixed half ring has a pair of oppositely arranged fixed half bolts.
[0009] As a preferred scheme, each pair of the inner chain plates has a plurality of rotatable rolling balls arranged at opposite end surfaces, the roller has rolling grooves at both end surfaces of the roller pieces, and the rolling balls are rotatably arranged in the rolling grooves.
[0010] As a preferred scheme, the sleeve has a plurality of circumferentially distributed vertical grooves, the inner chain link further comprises return springs and sliding columns, each group of the return springs is provided with a plurality of return springs, the sliding columns are provided in plurality, each of the sliding columns is slidably arranged in the plurality of vertical grooves, each group of the return springs is provided with a plurality of return springs, the plurality of return springs are axially spaced along the sliding column, both ends of the return spring are connected to the inner wall of the vertical groove and the sliding column, and the end surface of the sliding column, away from the return spring, is in close contact with the inner wall of the roller piece.
[0011] As a preferred scheme, the connecting pin shaft has a insertion hole and a fixed hole at an end, away from the connecting chain plate, of the connecting pin shaft, the outer chain link further comprises an insertion column and a fixed column, the insertion column is inserted into the insertion hole, the insertion column has a through hole, and one end of the fixed column is inserted into the through hole, and the other end of the fixed column is threadedly connected with the fixed hole.
[0012] As a preferred scheme, the cross-sectional diameter of one end of the fixed column, which is threadedly connected with the fixed hole, is smaller than the cross-sectional diameter of the other end.
[0013] As a preferred scheme, the length of the insertion column is greater than the cross-sectional diameter of the connecting pin shaft.
[0014] Compared with the prior art, the utility model has the beneficial effects that:
[0015] The utility model discloses a plurality of roller pieces are set up, and the adjacent side of the plurality of roller pieces has the installation groove, and the buffer spring is connected to the inner wall of the installation groove, and the fixed half ring has a pair of opposite fixed half bolts, and the fixed nut is threadedly connected with the fixed half bolt, along with the rotation of the chain wheel, the chain wheel tooth shifts to the adjacent gap, and the friction increases and generates heat, at this moment, the roller piece expands due to heat, and the buffer spring is stretched, after the equipment stops running, the roller piece contracts after cooling, and at this moment, the buffer spring restores, because the fixed nut is threadedly connected with the fixed half bolt on the fixed half ring, so that the plurality of roller pieces always adhere to each other, in this way, the roller piece and the buffer spring are set up to prevent the internal stress of the roller from being caused by repeated thermal expansion and cold contraction and from being cracked,
[0016] The utility model discloses a plurality of roller pieces are set up, and the adjacent side of the plurality of roller pieces has the installation groove, and the buffer spring is connected to the inner wall of the installation groove, and the fixed half ring has a pair of opposite fixed half bolts, and the fixed nut is threadedly connected with the fixed half bolt, along with the rotation of the chain wheel, the chain wheel tooth shifts to the adjacent gap, and the friction increases and generates heat, at this moment, the roller piece expands due to heat, and the buffer spring is stretched, after the equipment stops running, the roller piece contracts after cooling, and at this moment, the buffer spring restores, because the fixed nut is threadedly connected with the fixed half bolt on the fixed half ring, so that the plurality of roller pieces always adhere to each other, in this way, the roller piece and the buffer spring are set up to prevent the internal stress of the roller from being caused by repeated thermal expansion and cold contraction and from being cracked, ACCORDING TO THE DRAWINGS
[0017] Figure 1 It is the three-dimensional view of the utility model;
[0018] Figure 2 It is the structure diagram of the outer chain link and the inner chain link of the utility model;
[0019] Figure 3 It is the partial explosion drawing of the inner chain link of the utility model;
[0020] Figure 4 It is the partial explosion drawing of the outer chain link of the utility model.
[0021] In the drawing: 1, outer chain link;11, outer chain plate;12, connecting pin shaft;121, jack;122, fixed hole;13, connecting chain plate;14, plug-in column;141, through -hole;15, fixed column;2, inner chain link;21, sleeve;211, vertical groove;22, roller;221, roller piece;222, installation groove;223, rolling groove;23, inner chain plate;231, ball;24, fixed half ring;241, fixed half bolt;25, fixed nut;26, buffer spring;27, return spring;28, slide column. SPECIFIC IMPLEMENTATION
[0022] The utility model will be further described in connection with the embodiment.
[0023] The following examples are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the present application under the concept of the present application all belong to the protection scope of the present application.
[0024] Please refer to Figures 1-4 The present application provides a double-row roller chain, comprising:
[0025] The outer chain link 1 comprises an outer chain plate 11, a connecting pin shaft 12 and a connecting chain plate 13. The connecting pin shaft 12 and the outer chain plate 11 are both provided with multiple pairs. Each pair of outer chain plates 11 is detachably mounted at both ends of each pair of connecting pin shafts 12. The connecting chain plate 13 is fixedly connected to one end of each pair of connecting pin shafts 12 away from the outer chain plate 11.
[0026] The inner chain link 2 comprises a sleeve 21, a roller 22, an inner chain plate 23, a fixed half ring 24, a fixed nut 25 and a buffer spring 26. The inner chain plate 23 is provided with multiple pairs. Each pair of inner chain plates 23 is mounted at both ends of the sleeve 21. The roller 22 is rotatably sleeved on the sleeve 21. The connecting pin shaft 12 is inserted into the sleeve 21. The roller 22 comprises multiple roller pieces 221. The side surfaces of the multiple roller pieces 221 are mutually adhered. The roller 22 has mounting grooves 222 on the adjacent side surfaces of the multiple roller pieces 221. The two ends of the buffer spring 26 are connected to the inner walls of the mounting grooves 222 on the adjacent two roller pieces 221. The fixed half ring 24 is provided with multiple groups. Each group of fixed half rings 24 is provided with two. The two fixed half rings 24 are oppositely adhered to the outer wall of the roller 22. The fixed half ring 24 has a pair of oppositely arranged fixed half bolts 241. The fixed nut 25 is threadedly connected with the fixed half bolt 241.
[0027] Each pair of inner chain plates 23 has multiple rotatable rolling balls 231 arranged at intervals on the opposite end surfaces. The roller 22 has a rolling groove 223 on the two end surfaces of the roller piece 221. The rolling ball 231 is rotatably arranged in the rolling groove 223.
[0028] The sleeve 21 has multiple circumferentially distributed vertical grooves 211. The inner chain link 2 further comprises a return spring 27 and a sliding column 28. The return spring 27 is provided with multiple groups. The sliding column 28 is provided with multiple. Each sliding column 28 is slidably arranged in the multiple vertical grooves 211. Each group of return springs 27 is provided with multiple. The multiple return springs 27 are axially spaced along the sliding column 28. The two ends of the return spring 27 are connected to the inner wall of the vertical groove 211 and the sliding column 28. The end surface of the sliding column 28 away from the return spring 27 is adhered to the inner wall of the roller piece 221.
[0029] The connecting pin shaft 12 has a socket 121 and a fixing hole 122 at an end far from the connecting link plate 13, the outer link 1 further comprises a plug-in post 14 and a fixing post 15, the plug-in post 14 is plugged into the socket 121, the plug-in post 14 has a through hole 141, one end of the fixing post 15 is plugged into the through hole 141, and the other end of the fixing post 15 is screwed with the fixing hole 122;
[0030] The cross-sectional diameter of the one end of the fixing post 15 screwed with the fixing hole 122 is smaller than that of the other end;
[0031] The length of the plug-in post 14 is greater than the cross-sectional diameter of the connecting pin shaft 12.
[0032] The working principle and use process of the utility model are as follows:
[0033] In use, the sprocket teeth of the sprocket are clamped into the gap between the adjacent two rollers 22 and are attached to the outer wall of the rollers 22, and with the rotation of the sprocket, the sprocket teeth are transferred to the adjacent gap; after being used for a period of time, the friction between the rollers 22 and the sprocket teeth increases to generate heat, at this time, each roller piece 221 is heated and expanded, so that the buffer spring 26 is stretched; after the equipment stops running, each roller piece 221 is cooled and shrinks, at this time, the buffer spring 26 restores; since the fixed nut 25 is screwed with the fixed half bolt 241 on the fixed half ring 24, so that the plurality of roller pieces 221 are always attached to each other, in this way, by arranging the roller piece 221 and the buffer spring 26, the internal stress of the roller 22 caused by repeated thermal expansion and cold contraction is prevented from causing the roller 22 to crack;
[0034] In the process of the rotation of the roller 22 around the sleeve 21 in the axial direction, the plurality of rolling balls 231 on the two end faces of the inner link plate 23 rotate in the roller grooves 223 at the two ends of the roller 22, in this way, by arranging the plurality of rolling balls 231, the frictional resistance between the roller 22 and the sleeve 21 is reduced, the energy loss of the chain is reduced, and the rotation efficiency and service life are improved;
[0035] In addition, in the process of the rotation of the roller 22, the inner wall of the roller 22 is always attached to the plurality of sliding columns 28, when a gap appears between the roller 22 and the sleeve 21, under the action of the resilience of the return spring 27, the sliding column 28 in the vertical groove 211 is always attached to the inner wall of the roller 22, so that the roller 22 is kept stable during rotation, and by arranging the return spring 27, the vibration between the roller 22 and the sleeve 21 is reduced, so as to prolong the service life of the chain;
[0036] When the user needs to replace the inner link 2, the fixing post 15 is first rotated to make the fixing post 15 disengage from the fixing hole 122 and the through hole 141, then the plug-in post 14 is pulled out of the socket 121, the outer link plate 11 can be taken off from the connecting pin shaft 12, and then the inner link 2 is taken off from the connecting pin shaft 12 for replacement, so the operation is simple.
[0037] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A double-row roller chain, characterized in that, include: An outer link (1) includes an outer link plate (11), a connecting pin (12), and a connecting link plate (13). The connecting pin (12) and the outer link plate (11) are provided in multiple pairs. Each pair of outer link plates (11) is detachably installed at both ends of each pair of connecting pins (12). The connecting link plate (13) is fixedly connected to the end of each pair of connecting pins (12) away from the outer link plate (11). The inner link (2) includes a sleeve (21), a roller (22), an inner link plate (23), a fixed half ring (24), a fixed nut (25), and a buffer spring (26). Multiple pairs of inner link plates (23) are provided, each pair of which is installed at both ends of the sleeve (21). The roller (22) is rotatably fitted onto the sleeve (21). The connecting pin (12) is inserted into the sleeve (21). The roller (22) includes multiple roller plates (221), the sides of which are in contact with each other. (22) There are mounting grooves (222) on adjacent sides of the plurality of rollers (221), and the two ends of the buffer spring (26) are connected to the inner wall of the mounting groove (222) on two adjacent rollers (221). There are multiple sets of fixing half rings (24), and each set of fixing half rings (24) has two. The two fixing half rings (24) are respectively attached to the outer wall of the roller (22). The fixing half ring (24) has a pair of fixing half bolts (241) arranged opposite to each other. The fixing nut (25) is threadedly connected to the fixing half bolt (241).
2. The double-row roller chain according to claim 1, characterized in that: Each pair of inner chain plates (23) has a plurality of spaced rotatable balls (231) on one opposite end face, and the rollers (22) have grooves (223) on both ends of the roller plates (221), and the balls (231) are rotatably placed in the grooves (223).
3. A double-row roller chain according to claim 2, characterized in that: The sleeve (21) has multiple circumferentially distributed vertical grooves (211). The inner link (2) also includes a return spring (27) and a slide column (28). Multiple sets of return springs (27) are provided, and multiple slide columns (28) are provided. Each slide column (28) is slidably placed in multiple vertical grooves (211). Multiple sets of return springs (27) are provided. Multiple return springs (27) are spaced apart along the axial direction of the slide column (28). The two ends of the return springs (27) are connected to the inner wall of the vertical groove (211) and the slide column (28). The end face of the slide column (28) away from the return spring (27) is attached to the inner wall of the roller (221).
4. A double-row roller chain according to claim 3, characterized in that: The connecting pin (12) has a socket (121) and a fixing hole (122) at one end away from the connecting chain plate (13). The outer chain link (1) also includes a plug (14) and a fixing post (15). The plug (14) is inserted into the socket (121) and has a through hole (141). One end of the fixing post (15) is inserted into the through hole (141), and the other end of the fixing post (15) is threaded to the fixing hole (122).
5. A double-row roller chain according to claim 4, characterized in that: The diameter of the cross-section of one end of the fixed column (15) that is threaded into the fixed hole (122) is smaller than the diameter of the cross-section of the other end.
6. A double-row roller chain according to claim 5, characterized in that: The length of the plug post (14) is greater than the cross-sectional diameter of the connecting pin (12).