Anti-falling structure and triangular track assembly

Abstract

The utility model provides an anti-falling structure and a triangular track assembly. The first clamping groove is formed in the mandrel, the second clamping groove is formed in the limiting nut, the flat keys are arranged in the first clamping groove and the second clamping groove, circumferential rotation of the limiting nut on the mandrel is limited through the flat keys, meanwhile, the annular groove is formed in the end of the limiting nut, limiting of the flat keys is achieved through the elastic check ring, and the flat keys are prevented from falling off; the whole anti-loosening structure has the advantages of being simple in structure, good in anti-loosening effect, high in reliability, convenient to disassemble, capable of being repeatedly used and the like.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to an anti-detachment structure and a triangular track assembly. Background Technology

[0002] In related technologies, the integral triangular track assembly requires the frame to be mounted on the drive wheel spindle. Under the action of the triangular track's conformal impact and variable load, the friction between the threaded joints of the frame and the drive wheel spindle gradually decreases or disappears instantaneously, which can lead to loosening or even detachment of the connection between the frame and the drive wheel spindle. This can cause malfunctions in operating tractors and other agricultural machinery. Therefore, it is necessary to provide an anti-detachment structure and a triangular track assembly to overcome the aforementioned defects. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-detachment structure and a triangular track assembly.

[0004] According to a first aspect of this utility model, an anti-detachment structure is provided, comprising: a mandrel; a limiting nut, the limiting nut being screwed to the end of the mandrel, the end face of the limiting nut having an annular step, and the outer end face of the annular step being flush with the outer step surface of the mandrel; a first slot, the first slot being disposed on the end face of the mandrel and penetrating the diameter of the end face of the mandrel; a second slot, the second slot being disposed on the annular step and the end face of the limiting nut, the second slot including two slots of the same diameter disposed opposite to each other on the end face of the limiting nut; an annular groove, the annular groove being disposed on the circumference of the annular step; a flat key, the flat key being engaged in the first slot and the second slot, the middle position of the flat key being flush with the outer step surface of the annular step, and the two ends of the flat key being flush with the inner step surface of the annular step; and an elastic retaining ring, the elastic retaining ring being disposed in the annular groove, and the inner side of the elastic retaining ring abutting against the two ends of the flat key, and the inner ring of the elastic retaining ring abutting against the middle position of the flat key.

[0005] According to a second aspect of this utility model, an anti-detachment structure is provided, comprising: a mandrel; a sleeve shaft, the sleeve shaft being a hollow shaft, the sleeve shaft being sleeved on the outside of the mandrel, and the inner surface of the sleeve shaft having a first step; a first bearing, the first bearing being disposed between the mandrel and the sleeve shaft, and the outer bushing of the first bearing abutting against the outer step surface of the first step; a limiting nut, the limiting nut being screwed to the end of the mandrel and abutting against the inner bushing of the first bearing, the end face of the limiting nut having an annular step, and the outer step surface of the annular step being flush with the outer end face of the mandrel; and a first slot, the first slot being disposed on the end face of the mandrel and penetrating through the mandrel. The mandrel end face diameter; a second slot, the second slot being disposed on the annular step and the end face of the limiting nut, the second slot including two slots of the same diameter oppositely disposed on the end face of the limiting nut; an annular groove, the annular groove being disposed circumferentially on the annular step; a flat key, the flat key being engaged in the first and second slots, the middle position of the flat key being flush with the outer step surface of the annular step, the two ends of the flat key being flush with the inner step surface of the annular step; an elastic retaining ring, the elastic retaining ring being disposed in the annular groove, and the inner side of the elastic retaining ring abutting against the two ends of the flat key, the inner ring of the elastic retaining ring abutting against the middle position of the flat key.

[0006] Preferably, the other end of the mandrel is provided with a connecting disk, and the connecting disk drives the mandrel to rotate.

[0007] Preferably, a second step is provided at the connection between the connecting disc and the mandrel, and a second bearing is also provided between the mandrel and the sleeve shaft. The second bearing is axially limited by the outer step surface of the second step and the inner step surface of the first step.

[0008] Preferably, the first bearing and the second bearing are spaced at a predetermined distance, a lubricating oil cavity is formed between the mandrel and the sleeve shaft, and a corresponding oil injection hole is provided on the sleeve shaft.

[0009] Preferably, the connecting plate is provided with a connecting surface that connects to the sleeve shaft, and an oil seal assembly is provided between the outer surface of the second step, the side of the connecting plate, the connecting surface and the inner wall of the sleeve shaft.

[0010] Preferably, the oil seal assembly includes a first sealing ring disposed on the outer surface of the second step, a second sealing ring disposed on the outer surface of the second step and in contact with the first sealing ring, a first sealing ring disposed on the first sealing ring and connected to the connecting disc, and a second sealing ring disposed on the second sealing ring and connected to the inner wall of the sleeve shaft.

[0011] Preferably, the end of the sleeve shaft away from the connecting plate is sealed with an end cap, and the end cap, sleeve shaft and connecting plate cooperate to form a closed cavity.

[0012] Preferably, the number of the first card slots is 2, and the two first card slots are perpendicular to each other.

[0013] According to a third aspect of this utility model, a triangular track assembly is provided, employing the aforementioned anti-detachment structure.

[0014] Compared with the prior art, the triangular track assembly provided by this utility model has the following beneficial effects:

[0015] This utility model features a first slot on the mandrel and a second slot on the limiting nut, with a flat key inside both slots. The flat key restricts the circumferential rotation of the limiting nut on the mandrel. Simultaneously, an annular groove is provided at the end of the limiting nut, and an elastic retaining ring is used to limit the flat key, preventing it from falling off. The entire anti-loosening structure has advantages such as simple structure, good anti-loosening effect, high reliability, easy disassembly, and reusability. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a schematic diagram of the triangular track assembly in this utility model;

[0018] Figure 2 This is a schematic diagram of the anti-detachment structure in this utility model;

[0019] Figure 3 This is an exploded schematic diagram of the anti-detachment structure in this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the anti-detachment structure in this utility model;

[0021] Figure 5 The flat key and elastic retaining ring in this utility model (i.e. Figure 4 A magnified view of a portion of region A in the middle;

[0022] Figure 6 The sealing component in this utility model (i.e. Figure 4 A magnified view of a portion of region B in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Mandrel; 11. First slot; 12. Connecting disc; 212. Connecting surface; 13. First step; 14. Oil injection hole; 15. Oil seal assembly; 151. First sealing ring; 152. Second sealing ring; 153. First sealing ring; 154. Second sealing ring; 16. Second step; 2. Sleeve shaft; 21. End cap; 3. First bearing; 4. Second bearing; 5. Limiting nut; 51. Annular step; 52. Limiting part; 53. Groove part; 531. Gasket; 54. Second slot; 55. Annular groove; 6. Flat key; 61. Both ends of the flat key; 62. Middle position of the flat key; 7. Elastic retaining ring. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0026] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0030] See Figures 1 to 6 This embodiment discloses an anti-detachment structure, which is mainly applied at the connection between the frame and the drive wheel in a triangular track assembly, and defines the side closer to the drive disc as the inner side. It will be understood by those skilled in the art that in other embodiments, the fixed end is defined as the inner side. The anti-detachment structure includes: a spindle 1, a sleeve 2, a first bearing 3, a second bearing 4, a flat key 6, and an elastic retaining ring 7.

[0031] See Figure 1 , 2 A connecting plate 12 is provided on the side of the mandrel 1 near the drive wheel. The mandrel 1 is fixedly mounted on the drive wheel via the connecting plate 12, so that the mandrel 1 and the drive wheel rotate together. (See reference...) Figure 3 The sleeve 2 is a hollow shaft. The sleeve 2 is sleeved on the outside of the mandrel 1 and is fixedly installed on the mandrel 1 by the first bearing 3 and the second bearing 4, thereby fixing the frame on the mandrel 1.

[0032] See Figure 4 , 6 A first step 13 is provided on the inner surface of the sleeve shaft 2, and a second step 16 is provided at the connection between the connecting plate 12 and the spindle 1. The second bearing 4 is axially limited by the outer step surface of the second step 16 and the inner side surface of the first step 13.

[0033] See Figure 4 The first bearing 3 and the second bearing 4 are spaced at a predetermined distance, forming a lubricating oil cavity between the spindle 1 and the sleeve shaft 2. An end cap 22 is sealed at the end of the sleeve shaft 2 away from the connecting plate 12. The end cap 22, the sleeve shaft 2 and the connecting plate 12 cooperate to form a closed cavity. A corresponding oil injection hole 14 is provided on the sleeve shaft 2. Lubrication of the first bearing 3 and the second bearing 4 is achieved by periodically injecting lubricating oil.

[0034] See Figure 6The connecting plate 12 is provided with a connecting surface 121 that connects to the sleeve shaft 2, and an oil seal assembly 15 is provided between the outer surface of the second step 16, the side of the connecting plate, the connecting surface 121 and the inner wall of the sleeve shaft 2. The oil seal assembly 15 includes a first sealing ring 161 disposed on the outer surface of the second step 16, a second sealing ring 162 disposed on the outer surface of the second step 16 and in contact with the first sealing ring 161, a first sealing ring 163 disposed on the first sealing ring 161 and connected to the connecting plate 12, and a second sealing ring 164 disposed on the second sealing ring 162 and connected to the inner wall of the sleeve shaft 2, thereby realizing a rotary seal between the connecting plate 12 and the sleeve shaft 2.

[0035] The first sealing ring 161 and the second sealing ring 162 are metal sealing rings, and the first sealing ring 163 and the second sealing ring 164 are rubber sealing rings. The first sealing ring 163 and the second sealing ring 164 cooperate with the first sealing ring 161 and the second sealing ring 162 to make the connection between the connecting disc 12 and the sleeve shaft 2 more tightly, preventing mud and water from entering the closed cavity and also preventing grease leakage from the closed cavity.

[0036] See Figure 5 The outer bushing of the first bearing 3 abuts against the outer side of the first step 13. The limiting nut 5 is screwed to the end of the spindle 1 through a threaded pair. The limiting part 52 is located on the side of the driving wheel. A groove 53 is provided on the limiting part 52. A gasket 531 is provided on the groove 53 so that the gasket 531 abuts against the inner bushing of the first bearing 3, thereby limiting the first bearing 3.

[0037] See Figures 3 to 5 An annular step 51 is provided on the end face of the limiting nut 5 away from the drive wheel. The outer end face of the annular step 51 is flush with the outer step surface of the spindle 1. A first slot 11 is provided on the end face of the spindle 1 and extends through the diameter of the end face of the spindle 1. There are two first slots 11, and the two first slots 11 are perpendicular to each other. A second slot 54 is provided on the end face of the annular step 51 and the limiting nut 5. The second slot 54 includes two slots of the same diameter that are arranged opposite each other on the end face of the limiting nut 5. A flat key 6 is engaged in the first slot 11 and the second slot 54. The middle position 62 of the flat key 6 is flush with the outer step surface of the annular step 51, and the two ends 61 of the flat key 6 are flush with the inner step surface of the annular step 51. The flat key 6 restricts the circumferential rotation of the limiting nut 5 on the spindle 1, thereby limiting the first bearing 3 and the second bearing 4, and thus limiting the entire sleeve shaft 2.

[0038] See Figure 3 , 5The annular groove 55 is provided on the circumference of the annular step 51. The elastic retaining ring 7 is provided in the annular groove 55, and the inner side of the elastic retaining ring 7 abuts against the two ends 61 of the flat key 6. The inner ring of the elastic retaining ring 7 abuts against the middle position 62 of the flat key 6. The elastic retaining ring 7 is used to limit the flat key 6 and prevent the flat key 6 from falling off. The whole anti-loosening structure has the advantages of simple structure, good anti-loosening effect, high reliability, convenient disassembly and reusability.

[0039] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A detaching prevention structure characterized by comprising: The utility model relates to a bearing assembly, including: a mandrel; a limiting nut is screwed to the end of the mandrel, the end surface of the limiting nut is provided with an annular step, and the outer end surface of the annular step is flush with the outer step surface of the mandrel; a first clamping groove is arranged on the end surface of the mandrel and penetrates the diameter of the end surface of the mandrel; a second clamping groove is arranged on the annular step and the end surface of the limiting nut, and the second clamping groove includes two slots of the same diameter arranged oppositely on the end surface of the limiting nut; an annular groove is arranged on the circumferential surface of the annular step; a flat key is clamped in the first clamping groove and the second clamping groove, the middle position of the flat key is flush with the outer step surface of the annular step, and the two ends of the flat key are flush with the inner step surface of the annular step; an elastic retainer is arranged in the annular groove, the inner side of the elastic retainer abuts against the two ends of the flat key, and the inner ring of the elastic retainer abuts against the middle position of the flat key.

2. A structure for preventing detachment, characterized by The utility model relates to a bearing assembly, including: a mandrel; a sleeve shaft, which is a hollow shaft, is sleeved on the outside of the mandrel, and the inner surface of the sleeve shaft is provided with a first step; a first bearing is arranged between the mandrel and the sleeve shaft, and the outer bushing of the first bearing abuts against the outer step surface of the first step; a limiting nut is screwed to the end of the mandrel and abuts against the inner bushing of the first bearing, the end surface of the limiting nut is provided with an annular step, and the outer step surface of the annular step is flush with the outer end surface of the mandrel; a first clamping groove is arranged on the end surface of the mandrel and penetrates the diameter of the end surface of the mandrel; a second clamping groove is arranged on the annular step and the end surface of the limiting nut, and the second clamping groove includes two slots of the same diameter arranged oppositely on the end surface of the limiting nut; an annular groove is arranged on the circumferential surface of the annular step; a flat key is clamped in the first clamping groove and the second clamping groove, the middle position of the flat key is flush with the outer step surface of the annular step, and the two ends of the flat key are flush with the inner step surface of the annular step; an elastic retainer is arranged in the annular groove, the inner side of the elastic retainer abuts against the two ends of the flat key, and the inner ring of the elastic retainer abuts against the middle position of the flat key.

3. The detachment preventing structure according to claim 2, wherein The other end of the mandrel is provided with a connecting disc, and the connecting disc drives the mandrel to rotate.

4. The detachment preventing structure according to claim 3, wherein The connecting disc is provided with a second step at the connecting position of the connecting disc and the mandrel, a second bearing is further arranged between the mandrel and the sleeve shaft, and the second bearing is axially limited by the outer step surface of the second step and the inner step surface of the first step.

5. The detachment preventing structure according to Claim 4, wherein The first bearing and the second bearing are separated by a predetermined distance, a lubricating oil cavity is formed between the mandrel and the sleeve shaft, and a corresponding oil injection hole is arranged on the sleeve shaft.

6. The detachment preventing structure according to claim 5, wherein The connecting disc is provided with a connecting surface connected with the sleeve shaft, and an oil seal assembly is arranged between the outer surface of the second step, the side surface of the connecting disc, the connecting surface and the inner wall of the sleeve shaft.

7. The detachment preventing structure according to claim 6, wherein The oil seal assembly comprises a first sealing ring arranged on the outer surface of the second step, a second sealing ring arranged on the outer surface of the second step and abutting against the first sealing ring, a first sealing ring arranged on the first sealing ring and connected with the connecting disc, and a second sealing ring arranged on the second sealing ring and connected with the inner wall of the sleeve shaft.

8. The detachment preventing structure according to Claim 7, wherein The end cover, the sleeve shaft and the connecting disc cooperatively form a closed cavity.

9. The detachment preventing structure according to Claim 8, wherein The number of the first clamping grooves is 2, and the two first clamping grooves are perpendicular to each other.

10. A triangular track assembly characterized by, The anti-disengagement structure of any one of claims 1 to 9 is adopted.

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