High-strength step chain stable in operation

Abstract

The invention relates to the technical field of step chains, in particular to a high-strength step chain stable in operation. According to the technical scheme, the step chain comprises a first inner chain plate body, a second inner chain plate body, a sleeve, a hollow pin shaft, a roller, a first outer chain plate body, a second outer chain plate body, a check ring pin shaft, a check ring structure, a connecting chain plate, a first transition chain plate, a second transition chain plate, a third transition chain plate, a step chain, a first connecting gasket, a second connecting gasket and a distance ring. Each two of the first inner chain plate main bodies, the sleeves and the rollers are assembled to form an inner chain link, and each two of the first inner chain plate main bodies, the sleeves and the rollers are assembled to form an inner chain link. The invention has the following advantages: the overall operation stability in the use process is better, the bearing strength in the overall use process is higher, the durability in the use process is better, the service life is longer, and the use requirements in the application environment with higher requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of step chains, and in particular to a high-strength step chain with stable operation. Background Art

[0002] The step chain is a chain product used in escalators. It is different from conventional chains and has relatively high performance requirements in various aspects. The existing step chains are connected by chain links for use during use. The buffering and shock absorption effect cannot be achieved during operation. The running stability during use is relatively poor, and the bearing strength during use is difficult to guarantee. The lifespan during use is relatively short, and the maintenance cycle is also relatively short, which makes the cost of use relatively high. When the strength does not meet the requirements during operation, auxiliary components need to be installed and connected. Not only does the combination occupy a large space, but the installation cost during use is also relatively high. Summary of the invention

[0003] The purpose of the present invention is to provide a high-strength ladder chain with smooth operation. It adopts a brand-new structural design and is designed in a symmetrical structural form as a whole. The main body is connected by chain plates and matching components with multiple combinations of different specifications, which can ensure that the overall service life is longer and the utilization rate is higher. It is combined through different gasket structures and auxiliary components such as distance rings during installation. It can be flexibly moved and matched during installation and later maintenance as needed. The combination flexibility during use is stronger, the overall operation stability during use is better, the overall bearing strength during use is also higher, the durability during use is better, the service life is longer, and it can meet the use requirements in application environments with relatively high requirements.

[0004] The technical solution of the present invention is as follows: A high-strength ladder chain with stable operation, characterized in that it includes: a first inner link plate body, a second inner link plate body, a sleeve, a hollow pin shaft, a roller, a first outer link plate body, a second outer link plate body, a retaining ring pin shaft, a retaining ring structure, a connecting chain plate, a first transition chain plate, a second transition chain plate, a third transition chain plate, a ladder chain, a first connecting gasket, a second connecting gasket, a distance ring, a sleeve, a solid shaft, an edge roller, and a third connecting gasket. Every two of the first inner link plate body, the sleeve, and the roller are assembled into an inner chain link, and one of the inner chain links is assembled for every six links in the ladder chain; each of the first inner link plate body and the second inner link plate body is assembled into one The sleeves and rollers are assembled into inner links, and two of the inner links are assembled for every six links in the step chain. The first inner link plate body and the second inner link plate body of the inner link are assembled and used symmetrically. The second outer link plate body, two of the retaining ring pins and four retaining ring structures 9 are assembled into outer links, and one of the outer links is assembled for every six links in the step chain; the second outer link plate body, the first outer link plate body, the hollow pin, one of the retaining ring pins and two two retaining ring structures are assembled into outer links, and two of the outer links are assembled for every six links in the step chain. The second outer link plate body and the first An outer link plate body is symmetrically assembled and used, the hollow pin shaft is assembled at the non-protruding end of the first outer link plate body, and one end of the hollow pin shaft extends out of the first outer link plate body to form an exposed length L, and the exposed length L limits the distance between the roller and the first outer link plate body to ensure that the roller can rotate freely; the first transition chain plate, the second transition chain plate, the hollow pin shaft, the sleeve, and the roller are each assembled into a left transition link, and the left transition link, the inner attached link, and the outer link each form a left 3-segment, and the protruding portion of the second transition chain plate of the left transition link is aligned with the first The protrusions of the two inner link plate bodies are assembled in opposite directions; the first transition chain plate, the third transition chain plate, the hollow pin shaft, the sleeve, and the roller are assembled into a right transition link, and the right transition link, the inner attached link, and the outer link each form a right 3-segment. The protrusion of the third transition chain plate of the right transition link and the protrusion of the second inner link plate body of the inner attached link are assembled in opposite directions; the left 3 segments and the right 3 segments each form a shaft segment; the second transition chain plate and the second inner link plate body are on the left side of the left 3 segments, and the third transition chain plate and the second inner link plate body are on the right side of the right 3 segments;The two symmetrically used inner links are installed in the outer links, and the two symmetrically used outer links are installed on both sides of the inner links. The two inner links, the two outer links, the one inner link, and the one outer link form a total of six links to form a loop segment. The left and right paired loop segments form two shaft segments of a ladder chain. The second inner link plate body with a protruding portion and the first outer link plate body are on the left side of the left loop segment, and the second inner link plate body with a protruding portion and the first outer link plate body are on the right side of the right loop segment. The left and right paired two shaft segments are connected end to end to assemble into the required ladder chain. When the number of shafts of the ladder chain is an odd number, a certain number of shafts are assembled as needed. 1 shaft segment of the quantity; the first outer link plate body and the second inner link plate body are irregular single-side protruding structural designs; the first outer link plate body and the second inner link plate body are assembled on the outside of the ladder chain used in pairs on the left and right; the first outer link plate body and the second inner link plate body are used symmetrically in pairs, and a third connecting gasket is installed between the side roller and the hollow pin shaft assembled with the ladder chain single chain, and a first connecting gasket is installed between the step of the solid shaft and the hollow pin shaft assembled with the ladder chain 14 single chain; 1 distance ring, 1 shaft sleeve, and 4 second connecting gaskets are installed on both sides of the solid shaft, and the second connecting gasket is an annular thin plate with an opening. ;

[0005] Furthermore, the first inner link plate body, the second inner link plate body, the second outer link plate body, the first outer link plate body, the first transition link plate, the second transition link plate, and the third transition link plate have a surface hardness of HB370-430, and a core microstructure of lath martensite + free ferrite, which is a high-quality alloy steel in a normal quenching and tempering microstructure; the yield strength is 1000~1300MPa, and the tensile strength is 1200~1600MPa.

[0006] Furthermore, a stepped mounting matching groove is provided at the mounting position of the solid shaft, and a tool withdrawal groove is provided at the stop surface position of the mounting position.

[0007] Beneficial effects of the present invention: The present invention adopts a brand-new structural design and is designed in a symmetrical structural form as a whole. The main body is connected by chain plates and matching components with multiple combinations of different specifications, which can ensure a longer service life and higher utilization rate during overall use. It is combined through different gasket structures and auxiliary components such as distance rings during installation, and can be flexibly moved and matched during installation and later maintenance as needed. The combination flexibility during use is stronger, the overall operation stability during use is better, the overall bearing strength during use is also higher, the durability during use is better, the service life is longer, and it can meet the use requirements in application environments with relatively high requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a front view schematic diagram of the flattening chain part structure of the present invention; Figure 2 It is a top view schematic diagram of the flattening chain part structure of the present invention; Figure 3 It is a front structural schematic diagram of the chain transition connection part of the present invention; Figure 4 It is a schematic diagram of the top view of the chain transition connection part of the present invention; Figure 5 A half-section schematic diagram of the position of the central axis of the side roller of the present invention; Figure 6 It is a front schematic diagram of a single chain of the present invention; Figure 7 It is a top view schematic diagram of a single chain of the present invention; Figure 8 It is a front schematic diagram of the transition link in the present invention; Fig. 9 is a top view schematic diagram of a transition link in the present invention; Fig.10 It is a top view schematic diagram of the reverse transition link in the present invention; Fig.11 It is a cross-sectional schematic diagram of the AA position of the present invention; Fig.12 It is a cross-sectional schematic diagram of the BB position of the present invention; Fig.13 It is a cross-sectional schematic diagram of the CC position of the present invention; Fig.14 It is a partial enlarged schematic diagram of position F of the present invention; In the figure: 1. first inner link plate body 1, 2. second inner link plate body, 3. sleeve, 4. hollow pin, 5. roller, 6. first outer link plate body, 7. second outer link plate body, 8. retaining ring pin, 9. retaining ring structure, 10. connecting chain plate, 11. first transition chain plate, 12. second transition chain plate, 13. third transition chain plate, 14. step chain, 15. first connecting gasket, 16. second connecting gasket, 17. distance ring, 18. bushing, 19. solid shaft, 20. side roller, 21. third connecting gasket. DETAILED DESCRIPTION

[0009] like Figures 1 to 14As shown, a high-strength ladder chain with stable operation comprises a first inner link plate body 1, a second inner link plate body 2, a sleeve 3, a hollow pin shaft 4, a roller 5, a first outer link plate body 6, a second outer link plate body 7, a retaining ring pin shaft 8, a retaining ring structure 9, a connecting chain plate 10, a first transition chain plate 11, a second transition chain plate 12, a third transition chain plate 13, a ladder chain 14, a first connecting gasket 15, a second connecting gasket 16, a distance ring 17, a sleeve 18, a solid shaft 19, an edge roller 20, and a third connecting gasket 21. The first inner link plate body 1, the sleeve 3, and the roller 5 are assembled into inner chain links in pairs, and one inner chain link is assembled in every six links in the ladder chain; the first inner link plate body 1, the second One inner link plate body 2 and two sleeves 3 and rollers 5 are assembled into an inner attachment section, and two inner attachment sections are assembled for every 6 sections in the step chain. The first inner link plate body 1 and the second inner link plate body 2 of the inner attachment section are symmetrically assembled and used. The second outer link plate body 7, two retaining ring pins 8 and four retaining ring structures 9 are assembled into an outer chain section, and one outer chain section is assembled for every 6 sections in the step chain; the second outer link plate body 7, the first outer link plate body 6, the hollow pin 4, the retaining ring pin 8 and two two retaining ring structures 9 are assembled into an outer attachment section, and two outer attachment sections are assembled for every 6 sections in the step chain. The second outer link plate body 7 and the first outer link plate body 6 of the outer attachment section are symmetrically assembled and used. The assembly is used in a manner that is called as such, that is, the irregular single-sided protrusion of the first outer link plate body 6 assembled with one outer attachment forms a gap D with the irregular single-sided protrusion of the first outer link plate body 6 assembled with another outer attachment, and the gap D enables one side of two adjacent hinge pairs to rotate only at a small angle while the other side can rotate freely. The hollow pin shaft 4 is assembled at the non-protruding end of the first outer link plate body 6, and one end of the hollow pin shaft 4 extends out of the first outer link plate body 6 to form an exposed length L, and the exposed length L limits the distance between the roller and the first outer link plate body 6 to ensure that the roller can rotate freely; the first transition chain plate 11, the second transition chain plate 12, the hollow pin shaft 4, the sleeve 3, and the roller 5 are each one Assembled into a left transition link, the left transition link, the inner attached link, and the outer link each form a left 3-segment, and the protrusion of the second transition chain plate 12 of the left transition link is assembled in opposite directions to the protrusion of the second inner chain plate body 2 of the inner attached link; the first transition chain plate 11, the third transition chain plate 13, the hollow pin shaft 4, the sleeve 3, and the roller 5 are each assembled into a right transition link, and the right transition link, the inner attached link, and the outer link each form a right 3-segment, and the protrusion of the third transition chain plate 13 of the right transition link is assembled in opposite directions to the protrusion of the second inner chain plate body 2 of the inner attached link; the left 3 segments and the right 3 segments each form a shaft segment;The second transition chain plate 12 and the second inner chain plate body 2 are on the left side of the left 3 segments, and the third transition chain plate 13 and the second inner chain plate body 2 are on the right side of the right 3 segments; the two symmetrically used inner links are installed in the outer links, and the two symmetrically used outer links are installed on both sides of the inner links. The two inner links, the two outer links, the one inner link, and the one outer link, a total of 6 links, form a circulation segment, and the left and right paired circulation segments form 2 shaft segments of a ladder chain. The second inner chain plate body 2 and the first outer chain plate body 6 with protrusions are on the left side of the left circulation segment, and the second inner chain plate body 2 and the first outer chain plate body 6 with protrusions are on the right side of the right circulation segment. The left and right paired 2 shaft segments are connected end to end to assemble into the required ladder chain. When the number of shafts of the ladder chain is an odd number, a certain number of 1 shaft segments are assembled as needed; the first outer chain plate body 6 and the second inner chain plate body 2 are irregular single-sided protruding structures; the first outer chain plate body The first outer link plate body 6 and the second inner link plate body 2 are assembled on the outer side of the step chain 14 used in pairs on the left and right; the first outer link plate body 6 and the second inner link plate body 2 are used symmetrically in pairs, so that the irregular single-sided protrusion forms a gap D; the gap D allows two adjacent hinge pairs to only rotate at a small angle on one side and freely rotate on the other side, and at the same time, the gap D generated by the symmetrical use of the first outer link plate body 6 and the second inner link plate body 2 is alternately arranged between the two rollers of a sprocket wheel in every three sections, so that the two rollers The inner and outer chain links between the wheels do not sag too much due to their own weight, ensuring that each hinge pair of the step chain smoothly engages with the driving sprocket, so that the step chain runs smoothly. A third connecting gasket 21 is installed between the side roller 20 and the hollow pin shaft 4 assembled with the single chain of the step chain 14, and a first connecting gasket 15 is installed between the step of the solid shaft 19 and the hollow pin shaft 4 assembled with the single chain of the step chain 14. The first connecting gasket 15 and the third connecting gasket 21 have a buffering and shock-absorbing effect, thereby improving the overall performance of the step chain 14;A distance ring 17, a sleeve 18 and four second connection gaskets 16 are respectively installed on both sides of the solid shaft 19. The second connection gasket 16 is an annular thin plate with an opening, which is used to adjust and fix the step pedal and the sleeve to prevent the step pedal from moving left and right, thereby improving the running stability of the escalator. The sleeve is made of powder metallurgy, and the material is vacuum impregnated with oil, the oil grade is SHELL TELLUS C68 or ESSO FEBIS K68, the material density is 6.4-6.8g / cm3 / , the porosity is 13.5%, the hardness is greater than HB62, the tensile strength is greater than 236Mpa, the yield strength is greater than 182Mpa, and the elongation is greater than 2.2%. It has good structural strength and wear resistance. It adopts a new structural design, and is designed in a symmetrical structure. The main body is connected by multiple chain plates of different specifications and matching components, which can ensure a longer service life and higher utilization rate. It is combined with different gasket structures and auxiliary components such as distance rings during installation, and can be flexibly moved and matched during installation and later maintenance as needed. The combination flexibility during use is stronger, the overall operation stability during use is better, the overall bearing strength during use is also higher, the durability during use is better, and the service life is longer, which can meet the use needs of application environments with relatively high requirements. ;

[0010] Preferably, the first inner link plate body 1, the second inner link plate body 2, the second outer link plate body 7, the first outer link plate body 6, the first transition link plate 11, the second transition link plate 12, and the third transition link plate 13 have a surface hardness of HB370-430, a core microstructure of lath martensite + free ferrite, and are high-quality alloy steels in a normal quenched and tempered microstructure; the yield strength is 1000~1300MPa, the tensile strength is 1200~1600MPa, and they have good plasticity A≥10%, Z≥40% and toughness Akv≥59J, and have the advantages of good cold workability, weldability and small heat treatment distortion.

[0011] Preferably, the installation position of the solid shaft 19 is provided with a stepped installation matching groove, so that the step shaft and the hollow pin shaft have an interference fit, thereby improving the overall structural strength of the step chain. The stop surface position of the installation position is provided with a back-off groove, which can avoid the generation of grinding and clearing corners, reduce stress concentration, and improve fatigue performance.

[0012] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements or substitutions can be made without departing from the principles of the present invention. These improvements or substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A high-strength step chain with smooth operation, characterized by: The invention comprises a first inner link plate body (1), a second inner link plate body (2), a sleeve (3), a hollow pin shaft (4), a roller (5), a first outer link plate body (6), a second outer link plate body (7), a retaining ring pin shaft (8), a retaining ring structure (9), a connecting chain plate (10), a first transition chain plate (11), a second transition chain plate (12), a third transition chain plate (13), a step chain (14), a first connecting gasket (15), a second connecting gasket (16), a distance ring (17), a shaft sleeve (18), a solid shaft (19), an edge roller (20) and a third connecting gasket (21), wherein the first inner link plate body (1), the sleeve (3) and the roller (5) are assembled into inner chain links in pairs, and the inner chain links are assembled into pairs. One is assembled for every six links in the step chain; the first inner link plate body (1), the second inner link plate body (2), each of which is one, and the sleeve (3) and the roller (5) are each assembled to form an inner link, and two of the inner links are assembled for every six links in the step chain; the first inner link plate body (1) and the second inner link plate body (2) of the inner link are assembled and used symmetrically; the second outer link plate body (7), each of which is two of the retaining ring pin shaft (8) and four retaining ring structures (9) are assembled to form an outer link, and one of the outer links is assembled for every six links in the step chain; the second outer link plate body (7), the first outer link plate body (6), the hollow pin shaft (4), the retaining ring pin shaft (8) and two retaining ring structures (9) are each assembled to form an outer link. ) are assembled into an external attachment link, wherein two of the external attachment links are assembled for every six links in the ladder chain, and the second external link plate body (7) and the first external link plate body (6) of the external attachment link are assembled and used symmetrically, and the hollow pin shaft (4) is assembled at the non-protruding end of the first external link plate body (6), and one end of the hollow pin shaft (4) extends out of the first external link plate body (6) to form an exposed length L, and the exposed length L limits the distance between the roller and the first external link plate body (6) to ensure that the roller can rotate freely; the first transition chain plate (11), the second transition chain plate (12), the hollow pin shaft (4), the sleeve (3), and the roller (5) are each assembled into a left transition chain link, and the left transition chain link, The inner link and the outer link each form a left three-segment, and the protrusion of the second transition chain plate (12) of the left transition chain link is assembled in opposite directions to the protrusion of the second inner chain plate body (2) of the inner link; the first transition chain plate (11), the third transition chain plate (13), the hollow pin shaft (4), the sleeve (3), and the roller (5) are each assembled into a right transition chain link, and the right transition chain link, the inner link, and the outer link each form a right three-segment, and the protrusion of the third transition chain plate (13) of the right transition chain link is assembled in opposite directions to the protrusion of the second inner chain plate body (2) of the inner link; the left three segments and the right three segments each form a shaft segment;The second transition chain plate (12) and the second inner chain plate body (2) are on the left side of the left three segments, and the third transition chain plate (13) and the second inner chain plate body (2) are on the right side of the right three segments; two symmetrically used inner links are installed in the outer links, and two symmetrically used outer links are installed on both sides of the inner links. A total of six links, including two inner links, two outer links, one inner link, and one outer link, form a loop segment. The left and right paired loop segments form two shaft segments of a ladder chain. The second inner chain plate body (2) and the first outer chain plate body (6) with a protruding portion are on the left side of the left loop segment, and the second inner chain plate body (2) and the first outer chain plate body (6) with a protruding portion are on the right side of the right loop segment. The left and right paired two shaft segments are connected end to end to form the required ladder chain. When the number of shafts of the ladder chain is an odd number, as needed, Assemble a certain number of shaft segments; the first outer link plate body (6) and the second inner link plate body (2) are designed as irregular single-side protruding structures; the first outer link plate body (6) and the second inner link plate body (2) are assembled on the outer side of the ladder chain (14) used in pairs; the first outer link plate body (6) and the second inner link plate body (2) are used symmetrically in pairs; a third connecting gasket (21) is installed between the edge roller (20) and the hollow pin shaft (4) assembled with the ladder chain (14) single chain, and a first connecting gasket (15) is installed between the step of the solid shaft (19) and the hollow pin shaft (4) assembled with the ladder chain (14) single chain; a distance ring (17), a shaft sleeve (18), and four second connecting gaskets (16) are installed on both sides of the solid shaft (19), and the second connecting gasket (16) is an annular thin plate with an opening. ; 2. A high-strength step chain with smooth operation according to claim 1, characterized in that: The first inner link plate body (1), the second inner link plate body (2), the second outer link plate body (7), the first outer link plate body (6), the first transition link plate (11), the second transition link plate (12), and the third transition link plate (13) have a surface hardness of HB370-430, a core microstructure of lath martensite + free ferrite, and are high-quality alloy steel in a normal quenching and tempering microstructure; a yield strength of 1000-1300 MPa, and a tensile strength of 1200-1600 MPa.

3. A high-strength step chain with smooth operation according to claim 1, characterized in that: The installation position of the solid shaft (19) is provided with a stepped installation matching groove, and the stop surface position of the installation position is provided with a tool withdrawal groove.

Images