CN219452704U - Shaft end self-locking structure and axle assembly - Google Patents
Shaft end self-locking structure and axle assembly Download PDFInfo
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- CN219452704U CN219452704U CN202320586341.6U CN202320586341U CN219452704U CN 219452704 U CN219452704 U CN 219452704U CN 202320586341 U CN202320586341 U CN 202320586341U CN 219452704 U CN219452704 U CN 219452704U
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- lock nut
- axle
- locking structure
- nut
- face
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The utility model discloses a shaft end self-locking structure and a shaft assembly, wherein the shaft end self-locking structure comprises a shaft, a hub, an inner bearing, an outer bearing, a first locking nut and a second locking nut; the hub is arranged on the axle through an inner bearing and an outer bearing; the axle is provided with external threads, the first lock nut and the second lock nut are both in threaded connection with the external threads and form a lock nut assembly together, the inner side end surface of the lock nut assembly abuts against the outer side end surface of the inner ring of the outer bearing, and the first lock nut is provided with a first matching end surface facing the second lock nut; the first lock nut is provided with an extension part, and the internal thread on the first lock nut extends to the inner surface of the extension part; the second lock nut is provided with a pressing part, and the pressing part is matched with the outer surface of the extension part to press the extension part inwards when the first lock nut and the second lock nut are close to each other. The utility model simplifies the axle end structure of the axle and is easy to assemble.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a shaft end self-locking structure and a shaft assembly.
Background
The axle assembly of the trailer generally comprises an axle and a hub, wherein the hub is sleeved on the axle by the end part of the axle, and in order to ensure that the hub can flexibly rotate relative to the axle, the hub is generally arranged on the axle by adopting an inner bearing and an outer bearing, the inner bearing is clamped by a step surface on the axle and a bearing mounting position on the hub, the outer ring of the outer bearing is clamped at the bearing mounting position on the hub, and in order to move outside the outer bearing, a self-locking structure is required to be arranged at the end part of the axle so as to press the outer end surface of the inner ring of the outer bearing; the existing self-locking structure mainly comprises a spindle nose nut which is in threaded connection with an external thread on an axle, the spindle nose nut is utilized to inwards compress the outer end face of an inner ring of an outer bearing, meanwhile, in order to prevent the spindle nose nut from reversely rotating, the spindle nose nut with a special structure, a washer, a clamping piece and the like are needed to be arranged, reverse rotation of the spindle nose nut is avoided, the washer is specifically clamped with a key groove on the axle, after the spindle nose nut is screwed, the spindle nose nut compresses the washer, the washer is utilized to compress the outer end face of the inner ring of the outer bearing, the clamping piece is arranged between the spindle nose nut and the washer, two clamping parts arranged on the clamping piece are respectively clamped with the spindle nose nut and the washer, so that the spindle nose nut can be prevented from reversely rotating after the spindle nose nut is screwed, the spindle nose nut can be locked, the whole structure is complex, and the installation process is complicated.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a shaft end self-locking structure which can simplify the shaft end structure of an axle assembly and is easy to assemble.
The utility model provides an axle assembly.
In order to achieve the first purpose, the utility model adopts the following technical scheme:
the shaft end self-locking structure comprises an axle, a hub, an inner bearing, an outer bearing, a first lock nut and a second lock nut;
the hub is arranged on the axle through an inner bearing and an outer bearing;
the part of the axle, which penetrates out of the outer bearing, is provided with an external thread, the first lock nut and the second lock nut are both in threaded connection with the external thread, the first lock nut and the second lock nut are arranged along the axial direction of the axle and jointly form a lock nut assembly, the inner side end surface of the lock nut assembly abuts against the outer side end surface of the inner ring of the outer bearing, and the first lock nut is provided with a first matching end surface facing the second lock nut;
the first lock nut is provided with a plurality of extending parts which are arranged along the circumferential direction of the first lock nut, the extending parts extend from the first matching end face towards the second lock nut, the internal threads on the first lock nut extend to the inner surfaces of the extending parts, and a through groove is formed between two adjacent extending parts; the second lock nut is provided with a pressing part, and the pressing part is matched with the outer surface of the extension part to press the extension part inwards when the first lock nut and the second lock nut are close to each other.
The second lock nut is provided with a second matching end face opposite to the first matching end face.
An elastic element is clamped between the first lock nut and the second lock nut.
The elastic element is a spring piece clamped between the first matching end face and the second matching end face, and the spring piece is sleeved on the periphery of the plurality of extending parts and is wavy.
The elastic element is a spring clamped between the first matching end face and the second matching end face.
The second locking nut is provided with a taper hole, the taper hole extends to the second matching end face from the threaded hole of the second locking nut, the diameter of the taper hole gradually decreases from the second matching end face to the threaded hole of the second locking nut, and the inner surface of the taper hole forms a pressing part.
The outer surface of the extension portion is a slope which gradually inclines towards the central axis of the axle from one end close to the first matching end face to one end far away from the first matching end face.
The first lock nut is positioned on the outer side of the second lock nut, and the inner side end surface of the lock nut assembly is formed on the second lock nut opposite to the second matching end surface.
The first lock nut is positioned on the inner side of the second lock nut, and an inner side end surface of the lock nut assembly is formed on the first lock nut opposite to the first matching end surface.
In order to achieve the second purpose, the utility model adopts the following technical scheme:
the axle assembly comprises the axle end self-locking structure.
The utility model has the beneficial effects that:
according to the utility model, the first lock nut and the second lock nut are in threaded connection with the external threads of the axle, when the two lock nuts are mutually close, the extending part on the other lock nut is extruded in the radial direction by utilizing one lock nut, so that after the extending part is deformed, the threads on the inner surface of the extending part are mutually meshed with the threads on the external threads of the axle, thereby generating larger static friction force, finally compacting the inner ring of the external bearing and realizing shaft end self-locking.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view at A in FIG. 2;
fig. 4 is a schematic view of the cage nut assembly of fig. 1.
Description of the embodiments
The utility model is further described below with reference to the drawings and detailed description:
as shown in fig. 1, 2, 3 and 4, an axle end self-locking structure according to the present utility model comprises an axle 10, a hub 20, an inner bearing 21, an outer bearing 22, a first lock nut 30 and a second lock nut 40, wherein the cross section of at least one section of the axle 10 extending from the end portion thereof to the middle position is circular, the hub 20 is sleeved outside the part of the axle 10 with the circular cross section and pivoted on the axle through the inner bearing 21 and the outer bearing 22, wherein the inner bearing 21 and the outer bearing 22 are staggered by a certain distance along the axial direction of the axle 10 and are positioned at two end portions of the hub 20; the part of the axle 10 penetrated by the outer bearing 22 is provided with a section of external thread 11, the external thread 11 extends to the position of the outer bearing 22 from the end part of the axle 10, the first lock nut 30 and the second lock nut 40 are both in threaded connection with the external thread 11 and are arranged along the axial direction of the axle 10, wherein the first lock nut 30 is positioned at the outer side of the second lock nut 40, the first lock nut 30 and the second lock nut form a lock nut assembly together, the second lock nut 40 is in threaded connection with the external thread 11 to be screwed and abutted against the outer side end surface of the inner ring of the outer bearing 22, the inner ring of the outer bearing 22 is pressed inwards by the second lock nut 40, and the outer bearing 22 is prevented from moving, namely the inner side end surface 402 of the second lock nut 40 is pressed against the outer side end surface of the inner ring of the outer bearing 22; after the second lock nut 40 is sleeved on the external thread 11 from the end of the axle 10, the first lock nut 30 is sleeved on the external thread 11 from the end of the axle 10, the inner side end surface 301 of the first lock nut 30 forms a first matching surface, a plurality of extending parts 31 are arranged on the inner side end surface 301 of the first lock nut 30, the extending parts 31 are arranged along the circumferential direction of the first lock nut 30, each extending part 31 extends from the inner side end surface 301 towards the second lock nut 40, meanwhile, the internal thread of the first lock nut 30 extends to the inner surface of the extending part 31, and a through groove 32 is formed between two adjacent extending parts 31; for ease of understanding, the first lock nut 30 may be regarded as a nut having an annular flange protruding from one of its end faces, the annular flange being disposed around the hole of the nut, the internal thread of the nut extending to the inner surface of the annular flange, and a plurality of through grooves being cut in the annular flange, the portion between the through grooves forming the above-mentioned extension 31. The extension 31 is formed in a cantilever type structure by the through grooves 32 between the adjacent extension 31, and the end of the extension 31 far from the inner end face 301 forms a free end, so that the extension 31 can deform to a certain extent when being subjected to external force along the radial direction of the first locking nut 30 based on the relatively small thickness of the extension 31. The second lock nut 40 is provided with a pressing part, the pressing part is pressed on the outer surface of the extension part 31, when the first lock nut 30 moves towards the position close to the second lock nut 40, the pressing part can press the extension part 31 inwards, that is, after the second lock nut 40 is abutted against the inner ring of the outer bearing 22, the first lock nut 30 is rotated inwards, the first lock nut 30 is gradually closed towards the second lock nut 40, in the process, the pressing part gradually presses the extension part 31 towards the direction close to the central axis of the axle 10, the deformation amount of the extension part 31 is gradually increased while the extension part 31 is gradually pressed, and finally, the thread gap between the inner thread of the inner surface of the extension part 31 and the outer thread 11 on the axle 10 is eliminated, so that the extension part 31 is clamped between the pressing part and the axle 10, the extension part 31 is tightly pressed against the second lock nut 40, and the second lock nut 40 is prevented from loosening, thereby realizing self-locking of the second lock nut 40.
A second mating surface is formed on the outer end surface 401 of the second lock nut 40, and the second mating surface is opposite to the first mating surface, that is, the outer end surface 401 is opposite to the inner end surface 301 of the first lock nut 30, an elastic element is sandwiched between the outer end surface 401 and the inner end surface 301, and the elastic element is disposed between the first lock nut 30 and the second lock nut 40, and applies elastic stress to the first lock nut 30 and the second lock nut 40, so that the first lock nut 30 and the second lock nut 40 have a tendency to move in directions away from each other, thereby playing a role of pre-tightening. The elastic element may specifically be a spring plate 50, where the spring plate 50 is sleeved on the periphery of the plurality of extending portions 31, and the spring plate 50 is in a ring-shaped structure and is configured to extend in a wave shape. Of course, the elastic element may also be a spring clamped between the outer end surface 401 and the inner end surface 301.
In a preferred embodiment, the second lock nut 40 is provided with a taper hole, the taper hole extends from the threaded hole of the second lock nut 40 to the outer end face 401, the diameter of the taper hole gradually decreases from the outer end face 401 toward the threaded hole of the second lock nut 40, the inner surface 41 of the taper hole forms a pressing portion, when the first lock nut 30 is screwed down, the extension 31 is inserted into a wedge-shaped gap formed between the inner surface 41 and the axle 10, and during the process that the first lock nut 30 continuously leans against the second lock nut 40, the extension 31 is deformed and finally clamped by the inner surface 41, that is, the first lock nut 30 does not loose, the first lock nut 30 abuts against the second lock nut 40, so that the second lock nut 40 is prevented from loosening while the second lock nut 40 compresses the inner ring of the outer bearing 22. In order to taper the hole, the outer surface of the extension 31 may be formed as a slope, and the slope may be gradually inclined from the end near the inner end surface 301 to the end far from the inner end surface 301 toward the central axis of the axle 10, so that the outer surface of the extension 31 may be sufficiently contacted with the inner surface 41 of the taper hole, and the static friction force after the self-locking of the first lock nut 30 and the second lock nut 40 may be increased. Of course, in other embodiments, only the outer surface of the extension 31 may be provided with a slope, and the tapered hole provided on the second lock nut 40 may be replaced by a hole with a uniform cross section, and this structure can also be used to press the outer surface of the extension 31 by using the inner wall of the hole with a uniform cross section to deform the extension 31. Or only the second lock nut 40 is provided with a taper hole, and no taper is provided on the outer surface of the extension portion 31, which can achieve the purpose of pressing the extension portion 31 to deform it.
According to the utility model, the first lock nut and the second lock nut are screwed at the external thread of the axle, when the two lock nuts are mutually close, the extending part on the other lock nut is extruded along the radial direction by utilizing one lock nut, so that after the extending part is deformed, the screw teeth on the inner surface of the extending part are mutually meshed with the screw teeth of the external thread of the axle, thereby generating larger static friction force, finally compacting the inner ring of the external bearing and realizing axle end self-locking.
It should be noted that, in the above-mentioned structure, the extension portion 31 is disposed on the first lock nut 30, the inner ring of the outer bearing 22 is pressed by the second lock nut 40, in other embodiments, the extension portion 31 may be disposed on the second lock nut 40, the inner ring of the outer bearing 22 is pressed by the second lock nut 40, the pressing portion is disposed on the first lock nut 30, that is, the structure shown in fig. 3 is reversed, the inner ring of the outer bearing 22 is pressed by the end face 302 of the first lock nut 30, when the structure is mounted, the first lock nut 30 is screwed onto the external thread 11, then the second lock nut 40 is sleeved on the axle 10, and during the screwing process of the second lock nut 40, the extension portion 31 is pressed by the inner surface of the taper hole on the second lock nut 40, so that the extension portion 31 is deformed. In summary, the first lock nut 30 and the second lock nut 40 are utilized to form a lock nut assembly, when two lock nuts on the lock nut assembly are close to each other, the extension portion on one of the lock nuts can be extruded and deformed, and the inner side end surface of the lock nut assembly is used for compressing the outer side end surface of the inner ring of the outer bearing 22.
The axle assembly of the present utility model includes the above-described axle end self-locking structure, and other structures of the axle assembly are the same as those of the prior art and are not described in detail herein.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications may be made to the technical solutions described in the foregoing embodiments or equivalents may be substituted for some of the technical features thereof, and these modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model in essence.
Claims (10)
1. The shaft end self-locking structure is characterized by comprising an axle, a hub, an inner bearing, an outer bearing, a first locking nut and a second locking nut;
the hub is arranged on the axle through an inner bearing and an outer bearing;
the part of the axle, which penetrates out of the outer bearing, is provided with an external thread, the first lock nut and the second lock nut are both in threaded connection with the external thread, the first lock nut and the second lock nut are arranged along the axial direction of the axle and jointly form a lock nut assembly, the inner side end surface of the lock nut assembly abuts against the outer side end surface of the inner ring of the outer bearing, and the first lock nut is provided with a first matching end surface facing the second lock nut;
the first lock nut is provided with a plurality of extending parts which are arranged along the circumferential direction of the first lock nut, the extending parts extend from the first matching end face towards the second lock nut, the internal threads on the first lock nut extend to the inner surfaces of the extending parts, and a through groove is formed between two adjacent extending parts; the second lock nut is provided with a pressing part, and the pressing part is matched with the outer surface of the extension part to press the extension part inwards when the first lock nut and the second lock nut are close to each other.
2. The shaft end self-locking structure according to claim 1, wherein a second fitting end surface opposite to the first fitting end surface is provided on the second lock nut.
3. The shaft end self-locking structure according to claim 2, wherein an elastic member is sandwiched between the first lock nut and the second lock nut.
4. The shaft end self-locking structure according to claim 3, wherein the elastic element is a spring piece clamped between the first matching end face and the second matching end face, and the spring piece is sleeved on the periphery of the plurality of extension parts and is wavy.
5. A shaft end self-locking structure according to claim 3, wherein the elastic element is a spring clamped between the first mating end face and the second mating end face.
6. The shaft end self-locking structure according to claim 2, wherein a taper hole is provided on the second lock nut, the taper hole extends from the threaded hole of the second lock nut to the second mating end face, the diameter of the taper hole gradually decreases from the second mating end face toward the threaded hole of the second lock nut, and a pressing portion is formed on the inner surface of the taper hole.
7. The shaft end self-locking structure according to claim 6, wherein the outer surface of the extension portion is a slope gradually inclined toward the center axis of the shaft from an end near the first mating end face toward an end far from the first mating end face.
8. The shaft end self-locking structure according to claim 2, wherein the first lock nut is located outside the second lock nut, and an inner end surface of the lock nut assembly is formed on the second lock nut opposite to the second mating end surface.
9. The shaft end self-locking structure according to claim 2, wherein the first lock nut is located inside the second lock nut, and an inner end surface of the lock nut assembly is formed on the first lock nut opposite to the first mating end surface.
10. Axle assembly, characterized in that it comprises an axle end self-locking structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320586341.6U CN219452704U (en) | 2023-03-23 | 2023-03-23 | Shaft end self-locking structure and axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320586341.6U CN219452704U (en) | 2023-03-23 | 2023-03-23 | Shaft end self-locking structure and axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219452704U true CN219452704U (en) | 2023-08-01 |
Family
ID=87383870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320586341.6U Active CN219452704U (en) | 2023-03-23 | 2023-03-23 | Shaft end self-locking structure and axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219452704U (en) |
-
2023
- 2023-03-23 CN CN202320586341.6U patent/CN219452704U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |