Leaf chain and drive system

Abstract

The invention relates to the technical field of chains, in particular to a leaf chain and a driving system. The leaf chain comprises a plurality of outer chain links and a plurality of inner chain links which are sequentially connected, each outer chain link comprises a pin shaft and at least two outer chain plates, and each inner chain link comprises a plurality of inner chain plates; the pin shaft penetrates through the inner chain plates, and the two ends of the pin shaft are connected with the outer chain plates; wherein the outer chain plate comprises a plurality of outer chain pieces which are arranged in a stacked mode, or the inner chain plate comprises a plurality of inner chain pieces which are arranged in a stacked mode. The leaf chain is simple in structure and convenient to install, and the tensile strength can be improved on the premise that the overall size of the structure is not changed.

Description

Technical Field

[0001] The present invention relates to the technical field of chains, and in particular to a leaf chain and a drive system. Background Art

[0002] Leaf chain, also known as balance chain, is a key safety component on forklifts and cranes. Leaf chain has large load-bearing capacity and strong impact resistance. With the development of technology, higher requirements are placed on the tensile strength of chains of the same specifications. The existing method is to improve its tensile strength by changing the size, heat treatment process, material or a combination of the three, but the aforementioned methods cannot meet customer needs. Summary of the invention

[0003] The object of the present invention includes providing a leaf chain and a driving system which are simple in structure, easy to install, and capable of improving the tensile strength without changing the overall dimensions of the structure.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a leaf chain, the leaf chain comprising a plurality of outer links and a plurality of inner links connected in sequence, each outer link comprising a pin and at least two outer link plates, and the inner link comprising a plurality of inner link plates; the pin is passed through the inner link plates, and both ends of the pin are connected to the outer link plates;

[0006] The outer link plate includes a plurality of outer link plates which are stacked, or the inner link plate includes a plurality of inner link plates which are stacked.

[0007] In an optional embodiment, along the stacking direction of the plurality of outer link sheets, the thicknesses of adjacent outer link sheets are different.

[0008] In an optional embodiment, along the stacking direction of the plurality of inner link sheets, the thicknesses of adjacent inner link sheets are different.

[0009] In an optional embodiment, the roughness of the surface of each outer link that contacts with an adjacent outer link is a first roughness, and the roughness of the surface of each outer link that does not contact with an adjacent outer link is a second roughness; wherein the first roughness is greater than the second roughness.

[0010] In an optional embodiment, the roughness of the surface of each inner link sheet that contacts the adjacent inner link sheet is the third roughness, and the roughness of the surface of each inner link sheet that does not contact the adjacent inner link sheet is the fourth roughness; wherein the third roughness is greater than the fourth roughness.

[0011] In an optional embodiment, the leaf chain further comprises a plurality of first positioning members;

[0012] At least one first positioning member is disposed between any two adjacent outer chain pieces, and the first positioning member positions and connects the two adjacent outer chain pieces.

[0013] In an optional embodiment, each outer link is provided with a first positioning hole that cooperates with the first positioning member.

[0014] In an optional embodiment, the leaf chain further includes a plurality of second positioning members; at least one second positioning member is disposed between any two adjacent inner chain plates, and the second positioning member positions and connects two adjacent inner chain plates.

[0015] In an optional embodiment, each inner link is provided with a second positioning hole that cooperates with the second positioning member.

[0016] In a second aspect, the present invention provides a driving system, the driving system comprising the above-mentioned leaf chain.

[0017] The beneficial effects of the leaf chain and the drive system provided by the embodiments of the present invention include:

[0018] The plate chain includes a plurality of outer links and a plurality of inner links connected in sequence, each outer link includes a pin and at least two outer link plates, and the inner link includes a plurality of inner link plates; the pin passes through the inner link plates, and both ends of the pin are connected to the outer link plates; wherein the outer link plates include a plurality of stacked outer link plates, or the inner link plates include a plurality of stacked inner link plates. The plate chain has a simple structure, is easy to install, and can improve the tensile strength without changing the overall size of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the structure of the plate chain provided in this embodiment;

[0021] Figure 2 A schematic diagram of the structure of the outer chain link and the inner chain link provided in this embodiment;

[0022] Figure 3 for Figure 2 The local schematic diagram of the A in the middle;

[0023] Figure 4 for Figure 2 A partial schematic diagram of point B in the middle.

[0024] Icon: 100-plate chain; 110-outer link; 111-pin; 112-outer link plate; 113-outer link plate; 114-first positioning member; 115-first positioning hole; 120-inner link; 121-inner link plate; 122-inner link plate; 123-second positioning member; 124-second positioning hole. DETAILED DESCRIPTION

[0025] Leaf chain, also known as balance chain, is a key safety component on forklifts and cranes. Leaf chain has large load-bearing capacity and strong impact resistance. With the development of technology, higher requirements are placed on the tensile strength of chains of the same specifications. The existing method is to improve its tensile strength by changing the size, heat treatment process, material or a combination of the three. However, the aforementioned methods will cause changes in the structure and size of the chain, and will also cause changes in its assembly process. In addition, it may also lead to a significant increase in its production cost, which in turn leads to the improved chain not being able to meet customer needs.

[0026] In view of the above problems, the present invention provides a leaf chain 100, which is applied to the drive system of equipment such as forklifts and cranes to play the role of lifting and traction, and can also be used as a safety component in industrial equipment; the leaf chain 100 adopts one or more of the outer chain plates 112 or the inner chain plates 121 in the leaf chain 100 to be split along the thickness direction, so as to be divided into a plurality of chain plates under the condition that the thickness thereof remains unchanged, that is, the outer chain plate 112 is composed of a plurality of stacked outer chain plates 113, and the inner chain plate 121 is composed of a plurality of stacked inner chain plates 122, thereby being able to maintain the original overall structural dimensions under the condition that the thickness thereof remains unchanged, and the tensile strength thereof is improved through the structural form of the plurality of chain plates;

[0027] Compared with the method of increasing the tensile strength in the prior art, this method can maintain the original structural dimensions, thereby meeting the assembly requirements of customers, and has a low structural cost.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0034] Please refer to Figure 1 and Figure 2 The present embodiment provides a leaf chain 100, which includes a plurality of outer links 110 and a plurality of inner links 120 connected in sequence, each outer link 110 includes a pin 111 and at least two outer link plates 112, and the inner link 120 includes a plurality of inner link plates 121; the pin 111 is passed through the inner link plate 121, and both ends of the pin 111 are connected to the outer link plate 112;

[0035] The outer link plate 112 includes a plurality of outer link plates 113 that are stacked, or the inner link plate 121 includes a plurality of inner link plates 122 that are stacked.

[0036] Please refer to Figure 1 and Figure 2 , the working principle of the leaf chain 100 is:

[0037] The leaf chain 100 is applied to the driving system of equipment such as forklifts and cranes to play the role of lifting and traction, and can also be used as a safety component in industrial equipment; its structure adopts a method of connecting multiple outer chain links 110 and multiple inner chain links 120 in sequence, and when configuring the outer chain links 110, the outer chain plates 112 in the outer chain links 110 can be split along the thickness direction to be divided into multiple outer chain plates 113 while the thickness remains unchanged, that is, the outer chain plates 112 are composed of multiple stacked outer chain plates 113, thereby maintaining the original overall structural dimensions while the thickness remains unchanged, and improving the tensile strength through the structural form of multiple outer chain plates 113;

[0038] The inner link plate 121 in the inner link 120 may also be split along the thickness direction thereof, so as to be divided into a plurality of inner link plates 122 while keeping the thickness unchanged. That is, the inner link plate 121 is composed of a plurality of inner link plates 122 stacked in layers, thereby maintaining the original overall structural dimensions while keeping the thickness unchanged, and improving the tensile strength thereof through the structural form of the plurality of inner link plates 122.

[0039] Or, based on the above content, the outer link plate 112 in the outer link 110 is set as a plurality of outer link plates 113, and the inner link plate 121 in the inner link 120 is set as a plurality of inner link plates 122;

[0040] The above-mentioned arrangement can reduce the structural improvement of each outer link 110 and inner link 120 in the process of improving its tensile strength, so that the structural dimensions can be kept unchanged under the original specifications, so as to meet the customer's demand for the leaf chain 100 of the same specifications; in addition, on this basis, since the present embodiment can divide the outer link plate 112 into a plurality of outer link plates 113, and divide the inner link plate 121 into a plurality of inner link plates 122, such an arrangement can reduce the thickness of the outer link plates 113 and the inner link plates 122 relative to the thickness of the chain plates, and thus in such a way, when each outer link plate 113 and the inner link plate 122 is heat-treated, since the thickness of the outer link plates 113 and the inner link plates 122 is significantly reduced relative to the thickness of the original outer link plates 112 and the inner link plates 121, the heat treatment hardenability can be improved, thereby improving the tensile strength of the single plate, and then improving the overall tensile strength after the stacking arrangement;

[0041] In addition, thanks to the reduced thickness of the single piece, the heat treatment hardenability of the outer link plate 113 and the inner link plate 122 is significantly improved due to the heat treatment hardenability of the original outer link plate 112 and the inner link plate 121, so that more types of heat treatment methods can be applied, thereby improving the unit area strength of the single outer link plate 113 and the inner link plate 122, thereby improving the overall tensile strength after being stacked as a whole;

[0042] In summary, the plate chain 100 adopts a method of splitting one or more of the outer link plates 112 or the inner link plates 121 in the plate chain 100 along the thickness direction so as to divide them into multiple chain plates while keeping the thickness unchanged, that is, the outer link plate 112 can be composed of a plurality of stacked outer link plates 113, and the inner link plate 121 can be composed of a plurality of stacked inner link plates 122. Thus, the original overall structural dimensions can be maintained while the thickness remains unchanged, and the tensile strength can be improved through the structural form of multiple chain plates. Moreover, compared with the method of increasing the tensile strength in the prior art, this method can maintain the original structural dimensions, thereby meeting the assembly requirements of customers, and has a low structural cost.

[0043] Based on the above content, it should also be noted that, in actual use, the number of splits of the outer link plate 112 and the inner link plate 121 can be determined based on actual usage requirements. Of course, based on the above content, in actual use, the outer link plate 112 can be split into multiple outer link plates 113, the inner link plate 121 can be split into multiple inner link plates 122, or the outer link plate 112 and the inner link plate 121 can be split into multiple outer link plates 113 and multiple inner link plates 122 respectively.

[0044] For further information, please refer to Figure 1 and Figure 2 In this embodiment, based on the above content, when the outer link plate 112 is divided into multiple outer link plates 113, according to actual usage requirements, while keeping the thickness of the stacked outer link plates 112 consistent with the thickness of the existing outer link plates 112 of the same specification, the thickness of adjacent outer link plates 113 can also be different along the stacking direction of the multiple outer link plates 113.

[0045] Similarly, when the inner link plate 121 is divided into multiple inner link plates 122, based on actual usage requirements, while keeping the thickness of the stacked inner link plates 121 consistent with the thickness of the existing inner link plates 121 of the same specification, the thickness of adjacent inner link plates 122 can be different along the stacking direction of the multiple inner link plates 122.

[0046] That is, in actual use, the thickness of multiple outer link plates 113 belonging to the same outer link plate 112 can be adjusted according to the use requirements, and the thickness of multiple inner link plates 122 belonging to the same inner link plate 121 can be adjusted according to the use requirements. Such a setting method can not only make the overall structural strength adjustable according to the actual use requirements; the outer link plates 113 and the inner link plates 122 can also be made into standard parts with multiple sizes, so that during use, by assembling outer link plates 113 of different sizes or inner link plates 122 of different sizes, they can be assembled to form plate chains 100 of different specifications, so that the processing and assembly costs of the plate chain 100 can be reduced in this way; such a setting method can also be used when the plate chain 100 is maintained. If the outer link plate 113 of one of the outer link plates 112 or the inner link plate 122 of the inner link plate 121 is damaged, the damaged outer link plate 113 or the inner link plate 122 can be replaced, thereby reducing the difficulty of later maintenance.

[0047] It should also be noted that, through the above-mentioned structural setting, when manufacturing multiple outer link plates 113 and multiple inner link plates 122, different processing techniques, different materials and different thicknesses can be used to manufacture multiple outer link plates 113 and multiple inner link plates 122. Such a setting method enables each outer link plate 112 and each inner link plate 121 to flexibly adjust the configuration of its outer link plate 113 and inner link plate 122 according to the requirements of use, and then can be assembled into plate chains 100 of different specifications, different thicknesses, different strengths and different weights, so as to flexibly adapt to the customer's usage requirements and meet diverse market demands.

[0048] For further information, please refer to Figure 1 and Figure 2 In this embodiment, when multiple outer links 113 are stacked and combined into an outer link plate 112, in order to reduce the displacement or displacement between two adjacent outer links 113, the roughness of the surface of each outer link 113 that is used to contact the adjacent outer link 113 can be the first roughness, and the roughness of the surface of each outer link 113 that is not in contact with the adjacent outer link 113 can be the second roughness; wherein the first roughness is greater than the second roughness. Such a setting method is conducive to increasing the friction between two adjacent outer links 113, thereby reducing their mutual displacement and displacement during operation, so as to improve the stability of use.

[0049] Similarly, when multiple inner chain pieces 122 are stacked and combined into an inner chain plate 121, in order to reduce the displacement or displacement between two adjacent inner chain pieces 122, the roughness of the surface of each inner chain piece 122 that is used to contact the adjacent inner chain piece 122 is the third roughness, and the roughness of the surface of each inner chain piece 122 that is not in contact with the adjacent inner chain piece 122 is the fourth roughness; wherein the third roughness is greater than the fourth roughness. Such a setting method is conducive to increasing the friction between two adjacent inner chain pieces 122, thereby reducing their mutual displacement and displacement during operation, so as to improve the stability of use.

[0050] In addition to the above-mentioned method of changing the roughness of the contact surface of the two adjacent outer links 113 and the roughness of the contact surface of the two adjacent inner links 122, a positioning structure can also be arranged between the contact surfaces of the two adjacent outer links 113 and the contact surfaces of the two adjacent inner links 122, so as to position the two adjacent outer links 113 and the inner links 122 through the positioning structure to improve the stability of their use; it should be noted that when configuring the positioning structure, the positioning structure can be integrally formed on the outer link 113 or the inner link 122, or a separate positioning structure can be arranged;

[0051] For details, please refer to Figure 1-Figure 4 In this embodiment, the leaf chain 100 further includes a plurality of first positioning members 114; at least one first positioning member 114 is disposed between any two adjacent outer chain pieces 113, and the first positioning member 114 positions and connects two adjacent outer chain pieces 113. Accordingly, each outer chain piece 113 is provided with a first positioning hole 115 that matches the first positioning member 114.

[0052] Similarly, the leaf chain 100 further includes a plurality of second positioning members 123; at least one second positioning member 123 is disposed between any two adjacent inner chain plates 122, and the second positioning member 123 positions and connects the two adjacent inner chain plates 122. Accordingly, each inner chain plate 122 is provided with a second positioning hole 124 that cooperates with the second positioning member 123.

[0053] Therefore, through the above-mentioned structural setting, an independent first positioning member 114 that cooperates with multiple outer chain plates 113 can be set, or an independent second positioning member 123 that cooperates with multiple inner chain plates 122 can be set. The setting and selection of the first positioning member 114 and the second positioning member 123 need to be determined according to actual usage conditions; and further, through such a setting method, the structural stability of the multiple outer chain plates 113 and the multiple inner chain plates 122 in the actual assembly and use state can be improved, which is beneficial to improving the use stability of the plate chain 100.

[0054] Based on the above, please refer to Figure 1-Figure 4 The leaf chain 100 can improve the tensile strength by a large proportion through the structural arrangement of the outer link plate 113 and the inner link plate 122, combined with the improvement of the heat treatment process, while the overall size does not change much. The tensile test data of the LH1688 leaf chain 100 and the LH1034 leaf chain 100 of the prior art are compared with the tensile test data of the LH1688 leaf chain 100 and the LH1034 leaf chain 100 provided in this embodiment:

[0055] Specification Standard LH1688 LH1688 in this embodiment Improvement ratio Minimum tensile strength (kN) 338.1 590 74.5％ Specification Standard LH1034 LH1034 in this embodiment Improvement ratio Minimum tensile strength (kN) 48.9 75 53.3％

[0056] In summary, based on the above content, please refer to Figure 1-Figure 4 This embodiment also provides a driving system, which includes the above-mentioned leaf chain 100. The driving system is applied to equipment such as forklifts and cranes to play the role of lifting and pulling, and the driving system has all the advantages of the above-mentioned leaf chain 100.

[0057] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A leaf chain, characterized in that: The leaf chain comprises a plurality of outer links and a plurality of inner links connected in sequence, each of the outer links comprises a pin and at least two outer link plates, and the inner links comprise a plurality of inner link plates; the pin passes through the inner link plates, and both ends of the pin are connected to the outer link plates; Wherein, the outer link plate includes a plurality of outer link plates arranged in a stacked manner, or the inner link plate includes a plurality of inner link plates arranged in a stacked manner.

2. The leaf chain according to claim 1, characterized in that: Along the stacking direction of the plurality of outer link sheets, adjacent outer link sheets have different thicknesses.

3. The leaf chain according to claim 1, characterized in that: Along the stacking direction of the plurality of inner link sheets, adjacent inner link sheets have different thicknesses.

4. The leaf chain according to claim 1, characterized in that: The roughness of the surface of each outer link that contacts the adjacent outer link is the first roughness, and the roughness of the surface of each outer link that does not contact the adjacent outer link is the second roughness; wherein the first roughness is greater than the second roughness.

5. The leaf chain according to claim 1, characterized in that: The roughness of the surface of each inner link sheet that is in contact with the adjacent inner link sheet is the third roughness, and the roughness of the surface of each inner link sheet that is not in contact with the adjacent inner link sheet is the fourth roughness; wherein the third roughness is greater than the fourth roughness.

6. The leaf chain according to any one of claims 1 to 5, characterized in that: The leaf chain further comprises a plurality of first positioning members; At least one first positioning member is disposed between any two adjacent outer link pieces, and the first positioning member positions and connects the two adjacent outer link pieces.

7. The leaf chain according to claim 6, characterized in that: Each of the outer link plates is provided with a first positioning hole matched with the first positioning member.

8. The leaf chain according to any one of claims 1 to 5, characterized in that: The plate chain further includes a plurality of second positioning members; at least one second positioning member is disposed between any two adjacent inner chain plates, and the second positioning member positions and connects the two adjacent inner chain plates.

9. The leaf chain according to claim 8, characterized in that: Each of the inner chain plates is provided with a second positioning hole matched with the second positioning member.

10. A driving system, characterized in that: The drive system comprises a leaf chain as claimed in any one of claims 1-9.

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