High-elastic heavy-load coupling for mill

Abstract

The utility model discloses a high-elastic heavy-load coupler for a mill and a design method. The high-elastic heavy-load coupler for the mill comprises an inner gear ring, an outer gear ring, an outer gear ring and a coupling, the inner gear ring is provided with inner teeth extending in the center direction of the inner gear ring, and a tooth groove is formed between every two inner teeth; the outer gear ring is provided with outer teeth extending in the direction away from the center of the outer gear ring, the outer gear ring is arranged in the inner gear ring in a sleeving mode, and one outer tooth is arranged in one tooth groove; one elastic body is arranged between one outer tooth and one inner tooth, each elastic body at least comprises a first hardness part and a second hardness part, and the hardness of the first hardness part is larger than that of the second hardness part. The elastic body has the buffering performance with the soft hardness and also has the hard torque transmission effect, when equipment is started, the elastic body with the low hardness is firstly stressed and compressed, and the good buffering and damping effect is provided; when the elastic body is compressed to a certain amount, the elastic body with high hardness begins to contact and bear force, and therefore large torque is transmitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling technical field especially relates to a high elastic heavy load coupling for mill. BACKGROUND

[0002] Couplings can be divided into flexible couplings and rigid couplings according to whether they have the ability to compensate for the alignment error of the two connected shafts. Flexible couplings have compensation capability. In flexible couplings, according to whether they have elastic elements, they can be divided into flexible couplings with elastic elements and flexible couplings without elastic elements.

[0003] In flexible couplings with elastic elements, the alignment error of the two connected shafts is compensated by the deformation of the elastic elements. Of course, the transmission of torque also needs to be transmitted through the elastic elements, which puts higher requirements on the elastic elements, that is, they need to be both rigid and flexible, with enough rigidity to transmit torque and enough flexibility to provide cushioning and shock absorption.

[0004] This leads to a contradictory problem. The existing technical solutions generally use non-metallic elastic bodies as elastic elements. However, in order to ensure that the coupling can transmit a large enough torque, the hardness of the non-metallic elastic element is generally high, and the final cushioning and shock absorption effect is generally poor (that is, the hardness of the non-metallic elastic element prevents it from providing appropriate cushioning effect). Moreover, the hubs at both ends of the coupling are relatively fixed, which determines that its axial error compensation capability can only be within a small range.

[0005] Therefore, the skilled person in the art provides a high-elastic heavy-load coupling for a mill to solve the problems raised in the background art. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at solving the shortcomings in the prior art and provides a high-elastic heavy-load coupling for a mill.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A high-elastic heavy-load coupling for a mill, comprising:

[0009] An inner ring gear is provided with inner teeth extending towards the center of the inner ring gear, and a tooth slot is formed between every two inner teeth.

[0010] An outer ring gear is provided with outer teeth extending away from the center of the outer ring gear, and the outer ring gear is sleeved inside the inner ring gear, with one outer tooth being arranged in one tooth slot.

[0011] Elastomers, the number of which is multiple, one of the elastomers being arranged between one of the outer teeth and one of the inner teeth, the elastomers comprising at least a first hardness portion and a second hardness portion, the first hardness portion having a greater hardness than the second hardness portion; wherein,

[0012] When the high-elasticity heavy-load coupling of the mill is started, the second hardness elastomer group is first stressed, and after the second hardness elastomer group is deformed by being squeezed, the first hardness elastomer group starts to be stressed.

[0013] Optionally, the elastomer comprises a first side, a second side, a third side, and a fourth side, wherein the first side and the second side are arranged opposite to each other;

[0014] The third side and the fourth side are arranged opposite to each other;

[0015] The first side contacts the inner ring circumferential wall of the inner ring gear;

[0016] The second side contacts the outer ring circumferential wall of the outer ring gear;

[0017] The third side contacts one of the inner teeth of the inner ring gear or the outer teeth of the outer ring gear;

[0018] The fourth side contacts the other one of the inner teeth of the inner ring gear or the outer teeth of the outer ring gear; wherein,

[0019] The elastomer is limited by the inner ring circumferential wall, the inner teeth, the outer ring circumferential wall, and the outer teeth.

[0020] Optionally, the tooth groove is divided into a first volume tooth groove and a second volume tooth groove by the outer teeth, wherein the volume of the second volume tooth groove is greater than that of the first volume tooth groove, and one elastomer is accommodated in one of the second volume tooth grooves or in one of the first volume tooth grooves.

[0021] Optionally, the first hardness portion and the second hardness portion are integrally formed.

[0022] Optionally, the first side and the second side are the first hardness portion;

[0023] The third side and the fourth side are the second hardness portion; wherein,

[0024] The third side and the fourth side have an arc that curves away from the center of the elastomer.

[0025] Optionally, a plurality of strip-shaped grooves are arranged on the third side and the fourth side, each strip-shaped groove divides the elastic body into a plurality of elastic regions, wherein the elastic regions close to the two ends of the elastic body are first hardness portions, and the elastic region in the middle of the elastic body is a second hardness portion.

[0026] The second hardness portion has an arc that curves away from the center of the elastic body.

[0027] Optionally, the inner tooth has a shape in which the thickness gradually increases from one end of the inner tooth to the other end, wherein the one end with a relatively large thickness is an inner tooth thick end, and the other end is an inner tooth thin end.

[0028] The outer tooth has a shape in which the thickness gradually increases from one end of the outer tooth to the other end, wherein the one end with a relatively large thickness is an outer tooth thick end, and the other end is an outer tooth thin end.

[0029] In the assembled state, the inner tooth thick end is arranged opposite to the outer tooth thin end, and the inner tooth thin end (112) is arranged opposite to the outer tooth thick end.

[0030] Optionally, the high-elastic heavy-load coupling for a mill further comprises:

[0031] An end cover is arranged on one side of the outer tooth ring.

[0032] The utility model has the following beneficial effects:

[0033] The high-elastic heavy-load coupling for a mill disclosed by the utility model is designed by using an elastic body, so that the elastic body has both the buffering property of soft hardness and the function of transmitting torque of hard hardness. When the equipment is started, the elastic body with low hardness is first stressed and compressed, thereby providing a good buffering and damping effect. When the compression reaches a certain amount, the elastic body with high hardness starts to be stressed, thereby transmitting a large torque. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 FIG. 1 is a structural schematic view of a high-elastic heavy-load coupling for a mill according to a first embodiment of the present application;

[0035] Figure 2 FIG. 5 is a sectional structural schematic view of an inner tooth ring of the high-elastic heavy-load coupling for a mill according to the first embodiment of the present application;

[0036] Figure 3 FIG. 6 is a structural schematic view of an inner tooth ring of the high-elastic heavy-load coupling for a mill according to the first embodiment of the present application;

[0037] Figure 4 FIG. 7 is a structural schematic view of an outer tooth ring of the high-elastic heavy-load coupling for a mill according to the first embodiment of the present application;

[0038] Figure 5 Figure 1 is a cross-sectional view of an outer ring of a high-elasticity heavy-load coupling for a mill according to a first embodiment of the present application;

[0039] Figure 6 Figure 2 is a structural diagram of an elastic body in a high-elasticity heavy-load coupling for a mill according to a second embodiment of the present application;

[0040] Figure 7 Figure 3 is a structural diagram of an elastic body in a high-elasticity heavy-load coupling for a mill according to the first embodiment of the present application;

[0041] Figure 8 Figure 4 is a structural diagram of a high-elasticity heavy-load coupling for a mill according to the first embodiment of the present application.

[0042] Legend:

[0043] 1, inner ring; 11, inner teeth; 2, outer ring; 21, outer teeth; 3, elastic body; 31, first hardness portion; 32, second hardness portion; 12, inner ring circumferential wall; 22, outer ring circumferential wall; 4, first volume tooth groove; 5, second volume tooth groove; 111, inner tooth thick end; 112, inner tooth thin end; 211, outer tooth thick end; 212, outer tooth thin end; 6, end cover; 7, strip-shaped groove; 311, first hardness region of first elastic body; 312, first hardness region of first elastic body; 313, first side surface of first hardness elastic body; 316, fourth side surface of first hardness elastic body. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the utility model will be apparently and completely described in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range protected by the utility model. In the description of the application, it should be indicated that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the application. In order to facilitate the description, the sizes of the parts shown in the drawings are not drawn according to the proportional relationship. The technology, method and equipment known to the ordinary skilled in the related field can not be discussed in detail, but under appropriate circumstances, the technology, method and equipment should be regarded as part of the authorized description. In all the examples shown and discussed herein, any specific value should be interpreted as only exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0045] As shown in the formula Figures 1 to 8 The high-elastic heavy-load coupling for the mill comprises an inner ring gear 1, an outer ring gear 2 and an elastic body 3, wherein,

[0046] The inner ring gear 1 is provided with inner teeth 11 extending towards the center of the inner ring gear 1, and a tooth slot is formed between every two inner teeth;

[0047] The outer ring gear 2 is provided with outer teeth 21 extending away from the center of the outer ring gear, and the outer ring gear 2 is sleeved inside the inner ring gear, and one outer tooth is arranged in one tooth slot;

[0048] The number of the elastic body 3 is multiple, one elastic body 3 is arranged between one outer tooth 21 and one inner tooth 11, the elastic body 3 comprises a first hardness part 31 and a second hardness part 32, the hardness of the first hardness part 31 is greater than the hardness of the second hardness part 32; wherein,

[0049] When the high-elastic heavy-load coupling for the mill is started, the second hardness elastic body group is first stressed, and after the second hardness elastic body group is stressed and deformed to a preset threshold, the first hardness elastic body group starts to be stressed.

[0050] It can be understood that the preset threshold can be self-set by changing the hardness and shape of the second hardness elastic body group as needed.

[0051] In the embodiment, the inner part of the outer ring gear of the application is connected with the shaft of the external device.

[0052] The high-elastic heavy-load shaft coupling for a mill is designed by an elastic body, so that the elastic body has both the buffering property of soft hardness and the torque transmission property of hard hardness, the elastic body with low hardness is compressed when the equipment starts, and a good buffering and damping effect is provided, when the compression reaches a certain amount, the elastic body with high hardness starts to be stressed, so that greater torque is transmitted.

[0053] Referring to Figure 5 and Figure 6 The elastic body 3 comprises a first side 313, a second side, a third side and a fourth side 316, wherein the first side 313 is arranged opposite to the second side;

[0054] The third side is arranged opposite to the fourth side 316;

[0055] The first side 313 contacts the inner ring gear circumferential wall 12 of the inner ring gear 1;

[0056] The second side contacts the outer ring gear circumferential wall 22 of the outer ring gear 2;

[0057] The third side contacts one of the inner teeth 11 of the inner ring gear 1 or the outer teeth 21 of the outer ring gear 2;

[0058] The fourth side contacts the other one of the inner teeth 11 of the inner ring gear 1 or the outer teeth 21 of the outer ring gear 2; wherein,

[0059] The elastic body 3 is limited by the inner ring gear circumferential wall 12, the inner teeth 11, the outer ring gear circumferential wall 22 and the outer teeth 21.

[0060] In the embodiment, the groove is divided into a first volume groove and a second volume groove by the outer teeth 21, wherein the volume of the second volume groove is greater than that of the first volume groove, one elastic body 3 is accommodated in one second volume groove or one first volume groove.

[0061] In this way, when the outer ring gear rotates clockwise, a part of the elastic body is first extruded, the inner ring gear has not rotated, and the outer ring gear rotates, at this time, the gap in the second volume groove is eliminated (because the size of the elastic body is the same, that is, if the elastic body placed in the first volume groove can exactly fit the walls of the first volume groove, there will be some gap in the second volume groove, and during the rotation of the outer ring gear, the gap gradually decreases to 0), at this time, the elastic body in the second volume groove starts to be stressed to transmit greater torque.

[0062] In the embodiment, the first hardness part and the second hardness part are integrally formed.

[0063] In the embodiment, the elastic body is made of polyurethane.

[0064] In one embodiment, the first side surface 313 and the second side surface are the first hardness part 31;

[0065] The third side surface and the fourth side surface are the second hardness part 32; wherein,

[0066] The third side surface and the fourth side surface have an arc that curves away from the center of the elastic body 3.

[0067] Referring to Figure 7 In this embodiment, a plurality of strip-shaped grooves 7 are arranged on the third side surface and the fourth side surface, each strip-shaped groove divides the elastic body 3 into a plurality of elastic regions, wherein the elastic regions near the two ends of the elastic body are the first hardness part 31, and the elastic region in the middle of the elastic body is the second hardness part 32; wherein,

[0068] The second hardness part 32 has an arc that curves away from the center of the elastic body 3.

[0069] Referring to Figure 3 , Figure 4 In this embodiment, the inner tooth 11 has a shape that gradually increases in thickness from one end to the other end of the inner tooth 11, wherein the end with a thicker thickness is the inner tooth thick end 111, and the other end is the inner tooth thin end 112;

[0070] The outer tooth 21 has a shape that gradually increases in thickness from one end to the other end of the outer tooth 21, wherein the end with a thicker thickness is the outer tooth thick end 211, and the other end is the outer tooth thin end 212; wherein,

[0071] In the assembled state, the inner tooth thick end 111 is arranged opposite to the outer tooth thin end 212, and the inner tooth thin end 112 is arranged opposite to the outer tooth thick end 211.

[0072] Referring to Figure 8 In this embodiment, the high-elastic heavy-load coupling for a mill further comprises an end cover 6 arranged on one side of the outer tooth ring 2.

[0073] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-elastic heavy-duty coupling for a mill, characterized in that, The high-elastic heavy-load coupling for the mill comprises: an inner ring (1) provided with inner teeth (11) extending towards the center of the inner ring (1), each two inner teeth forming a tooth slot; an outer ring (2) provided with outer teeth (21) extending away from the center of the outer ring, the outer ring (2) being sleeved inside the inner ring, one outer tooth being arranged in one tooth slot; a plurality of elastic bodies (3), one elastic body (3) being arranged between one outer tooth (21) and one inner tooth (11), the elastic body (3) comprising at least a first hardness part (31) and a second hardness part (32), the hardness of the first hardness part (31) being greater than the hardness of the second hardness part (32); wherein when the high-elastic heavy-load coupling for the mill is started, the second hardness part (32) is first stressed, and after the second hardness part (32) is deformed by being extruded under stress, the first hardness part (31) starts to be stressed.

2. A high-elastic heavy-duty shaft coupling for a mill as claimed in claim 1, characterized in that, The elastic body (3) comprises a first side (313), a second side, a third side, and a fourth side (316), wherein the first side (313) is arranged opposite to the second side; the third side is arranged opposite to the fourth side (316); the first side (313) contacts an inner ring circumferential wall (12) of the inner ring (1); the second side contacts an outer ring circumferential wall (22) of the outer ring (2); the third side contacts one of the inner teeth (11) of the inner ring (1) or the outer teeth (21) of the outer ring (2); the fourth side contacts the other one of the inner teeth (11) of the inner ring (1) or the outer teeth (21) of the outer ring (2); wherein the elastic body (3) is limited by the inner ring circumferential wall (12), the inner teeth (11), the outer ring circumferential wall (22), and the outer teeth (21).

3. A high-elastic heavy-duty coupling for a mill as claimed in claim 2, characterized in that, The tooth slot is divided into a first volume tooth slot and a second volume tooth slot by the outer teeth (21), wherein the volume of the second volume tooth slot is greater than the volume of the first volume tooth slot, and one elastic body (3) is accommodated in one second volume tooth slot or one first volume tooth slot.

4. A high-elastic heavy-duty shaft coupling for a mill as claimed in claim 3, characterized in that, The first hardness part and the second hardness part are integrally formed.

5. The high-elastic heavy-load coupling for the mill according to claim 4, wherein the first side (313) and the second side are the first hardness part (31); the third side and the fourth side are the second hardness part (32); wherein the third side and the fourth side have an arc bending away from the center of the elastic body (3).

6. A high-elastic heavy-duty shaft coupling for a mill as claimed in claim 4, characterized in that, The third side and the fourth side are provided with a plurality of strip-shaped grooves (7), each strip-shaped groove dividing the elastic body (3) into a plurality of elastic regions, wherein the elastic regions near the two ends of the elastic body are the first hardness part (31), and the elastic region in the middle of the elastic body is the second hardness part (32); wherein The second hardness part (32) has an arc that curves away from the center of the elastic body (3).

7. A high-elastic heavy-duty coupling for a mill according to any one of claims 1 to 6, characterized in that, The inner tooth (11) has a shape with gradually increasing thickness from one end to the other end, wherein the end with thicker thickness is an inner tooth thick end (111), and the other end is an inner tooth thin end (112); The outer tooth (21) has a shape with gradually increasing thickness from one end to the other end, wherein the end with thicker thickness is an outer tooth thick end (211), and the other end is an outer tooth thin end (212); wherein, In the assembled state, the inner tooth thick end (111) is arranged opposite to the outer tooth thin end (212), and the inner tooth thin end (112) is arranged opposite to the outer tooth thick end (211).

8. A high-elastic heavy-duty shaft coupling for a mill as claimed in claim 7, characterized in that, The high-elastic heavy-load shaft coupling for the mill further comprises: An end cover (6) is arranged on one side of the outer tooth ring (2).

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