CN218913057U - Spherical friction pair structure of telescopic swing cylinder type hydraulic motor - Google Patents
Spherical friction pair structure of telescopic swing cylinder type hydraulic motor Download PDFInfo
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- CN218913057U CN218913057U CN202223201774.XU CN202223201774U CN218913057U CN 218913057 U CN218913057 U CN 218913057U CN 202223201774 U CN202223201774 U CN 202223201774U CN 218913057 U CN218913057 U CN 218913057U
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Abstract
The utility model discloses a spherical friction pair structure of a telescopic swing cylinder type hydraulic motor, which comprises an oil cylinder and a crankshaft, wherein an annular spherical friction pair is formed between the bottom end of the oil cylinder and the crankshaft, the bottom end of the oil cylinder is a concave spherical surface, and the contact surface between the crankshaft and the bottom end of the oil cylinder is a convex spherical surface; the concave spherical surface comprises a spherical surface section A, a groove and a spherical surface section B, wherein the spherical surface section A and the spherical surface section B are concentric, and the spherical center is positioned on the center line of an inner hole of the oil cylinder; and a groove containing cavity is formed between the groove and the convex spherical surface, and the central line of the groove coincides with the central line of the inner hole of the oil cylinder. Compared with the prior art, the spherical friction pair of the telescopic tilt cylinder type hydraulic motor has the advantages of easiness in modification, low manufacturing cost, simple structure, strong lubricating performance, long service life and the like.
Description
Technical Field
The utility model relates to the technical field of hydraulic motors, in particular to a spherical friction pair structure of a telescopic tilt cylinder type hydraulic motor.
Background
The low-speed high-torque hydraulic motor has the advantages of small volume, flexible layout, good speed regulation performance and the like, is increasingly widely applied to engineering machinery, and the oil cylinder and the crankshaft spherical friction pair are used as core execution elements of a hydraulic system, so that the performance of the hydraulic system is directly influenced by the performance output of the hydraulic system.
In practical application and maintenance, abrasion and failure of the spherical friction pair of the oil cylinder and the crankshaft are main reasons for failure and reliability reduction of the telescopic swing cylinder type hydraulic motor. The hydraulic system is used as a main force transmission component of the telescopic swing cylinder type hydraulic motor, a friction pair formed by the oil cylinder and the crankshaft plays important force transmission and sealing roles in the telescopic swing cylinder type hydraulic motor, and particularly in the working process of driving a high-power load, a lubricating oil film cannot be established in time at the contact surface of the friction pair, and abnormal abrasion is easily caused on the friction pair matching surface due to contact friction among friction pair parts, so that internal leakage of the motor is increased, and the friction pair is invalid.
Specifically, as shown in fig. 3, when the hydraulic motor works, high-pressure oil entering the oil cylinder generates a large hydraulic thrust P on the spherical surface of the crankshaft, and the hydraulic thrust works by generating torque T on the crankshaft through a force arm e formed by the center O' of the crankshaft and the rotation center O of the crankshaft. As shown in fig. 4, during the starting process of the crankshaft pushed by the high-pressure oil entering the oil cylinder, eccentric wear is easy to occur between the oil cylinder and the crankshaft, and meanwhile, under the effect of tangential oil flow, an oil film is not easy to form on the side of the friction pair 101' away from the inner hole 104 of the oil cylinder, so that contact type abnormal contact wear occurs on the surface of the friction pair.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide the spherical friction pair structure of the telescopic tilt cylinder type hydraulic motor, which has the advantages of simple structure, strong lubricating performance, abrasion resistance and long service life.
The utility model adopts the following technical scheme:
the spherical friction pair structure of the telescopic swing cylinder type hydraulic motor comprises an oil cylinder and a crankshaft, wherein an annular spherical friction pair is formed between the bottom end of the oil cylinder and the crankshaft, the bottom end of the oil cylinder is a concave spherical surface, and the contact surface between the crankshaft and the bottom end of the oil cylinder is a convex spherical surface; the concave spherical surface comprises a spherical surface section A, a groove and a spherical surface section B, wherein the spherical surface section A and the spherical surface section B are concentric, and the spherical center is positioned on the center line of an inner hole of the oil cylinder; and a groove containing cavity is formed between the groove and the convex spherical surface, and the central line of the groove coincides with the central line of the inner hole of the oil cylinder.
Further, the groove is an annular groove.
Preferably, the grooves are intermittent grooves.
Further, the spherical surface section A occupies one quarter to one third of the width of the whole concave spherical surface.
Preferably, the depth h of the concave spherical surface is 0.5-0.8 mm.
Further, the sphere diameter of the spherical surface section B is 0.1-0.15 mm larger than that of the spherical surface section A.
Preferably, the spherical diameter of the convex spherical surface of the crankshaft is 0.2-0.3 mm larger than that of the spherical surface section A.
Compared with the prior art, the utility model has the beneficial effects that: the spherical friction pair structure is provided with a spherical section A, a groove and a spherical section B, and the arrangement of the spherical section A and the spherical section B can effectively ensure the sealing performance of the friction pair; the groove containing cavity formed by the groove and the convex spherical surface can contain oil, so that the oil film characteristic of the end surface of the friction pair is effectively improved, the lubricating performance and the pollution resistance of the oil cylinder and the spherical friction pair of the crankshaft are enhanced, and the abnormal abrasion caused by lean oil and eccentric wear of the oil cylinder of the telescopic hydraulic motor and the friction pair of the crankshaft is effectively relieved; the hydraulic motor has the advantages of simple structure and lower requirements on the processing technology, and effectively improves the reliability of the hydraulic motor and prolongs the service life of the hydraulic motor on the basis of not increasing the manufacturing cost.
Drawings
Fig. 1 is a schematic view of the spherical friction structure of the hydraulic motor of the present utility model.
Fig. 2 is an enlarged schematic view of the structure of I in fig. 1.
FIG. 3 is a simplified diagram of cylinder crankshaft forces.
Fig. 4 is a schematic diagram of a spherical friction structure of a hydraulic motor of a conventional telescopic tilt cylinder.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and detailed description below:
in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1 and 2, a spherical friction pair structure of a telescopic tilt cylinder type hydraulic motor comprises an oil cylinder 1 and a crankshaft 2, wherein an annular spherical friction pair, namely a friction pair end face, is formed between the bottom end of the oil cylinder and the crankshaft; the bottom end of the oil cylinder is a concave spherical surface, and the contact surface between the crankshaft and the bottom end of the oil cylinder is a convex spherical surface 201; the concave spherical surface comprises a spherical surface A section 101, a groove 102 and a spherical surface B section 103, wherein the spherical surface A section 101 and the spherical surface B section 103 are concentric, and the spherical center is positioned on the central line a of an inner hole 104 of the oil cylinder; and a groove containing cavity is formed between the groove and the convex spherical surface, and the central line of the groove coincides with the central line a of the inner hole of the oil cylinder.
The friction pair between the oil cylinder and the crankshaft ensures that two end surfaces are tightly attached in the working process of the hydraulic motor, and a certain bearing oil film is formed between the end surfaces of the friction pair to avoid contact friction between the oil cylinder and the crankshaft.
Specifically, when the hydraulic motor works, high-pressure oil entering the oil cylinder generates a larger hydraulic thrust P on the spherical surface of the crankshaft, the hydraulic thrust works by pushing a load by torque T generated by the crankshaft through a force arm e formed by a crankshaft center O' (a center line B) and a crankshaft rotation center O (a center line c), and the oil cylinder and the crankshaft still generate offset.
In order to store more lubricating oil, the grooves are annular grooves.
In order to improve the performance of the end face, the grooves are intermittent grooves, and preferably, the intermittent grooves are equidistant grooves.
The spherical surface A section occupies one fourth to one third of the width of the whole concave spherical surface, so that high-pressure oil in an inner hole of the oil cylinder can be effectively sealed, and the contact surface can be well lubricated.
In order to ensure that a bearing oil film is formed without affecting the mechanical property of the oil cylinder, the depth h of the concave spherical surface is 0.5-0.8 mm.
The sphere diameter of the sphere section B is 0.1-0.15 mm larger than that of the sphere section A, the arrangement of the structure can ensure the initial stage of part operation, the inner hole of the oil cylinder is communicated with the groove, and the full contact of the crankshaft and the concave sphere of the oil cylinder is avoided.
In order to form a certain bearing oil film, the spherical diameter of the convex spherical surface of the crankshaft is 0.2-0.3 mm larger than that of the spherical surface section A.
Compared with the prior art, the utility model has the beneficial effects that: the spherical friction pair structure is provided with a spherical section A, a groove and a spherical section B, and the arrangement of the spherical section A and the spherical section B can effectively ensure the sealing performance of the friction pair; the groove containing cavity formed by the groove and the convex spherical surface can contain lubricating oil/high-pressure oil, so that the oil film characteristic of the end surface of the friction pair is effectively improved, the lubricating performance and the pollution resistance of the oil cylinder and the spherical friction pair of the crankshaft are enhanced, and the abnormal abrasion caused by lean oil and eccentric wear of the oil cylinder of the telescopic hydraulic motor and the friction pair of the crankshaft is effectively relieved; the hydraulic motor has the advantages of simple structure and lower requirements on the processing technology, and effectively improves the reliability of the hydraulic motor and prolongs the service life of the hydraulic motor on the basis of not increasing the manufacturing cost.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.
Claims (7)
1. The spherical friction pair structure of the telescopic swing cylinder type hydraulic motor is characterized by comprising an oil cylinder and a crankshaft, wherein an annular spherical friction pair is formed between the bottom end of the oil cylinder and the crankshaft, the bottom end of the oil cylinder is a concave spherical surface, and the contact surface between the crankshaft and the bottom end of the oil cylinder is a convex spherical surface;
the concave spherical surface comprises a spherical surface section A, a groove and a spherical surface section B, wherein the spherical surface section A and the spherical surface section B are concentric, and the spherical center is positioned on the center line of an inner hole of the oil cylinder;
and a groove containing cavity is formed between the groove and the convex spherical surface, and the central line of the groove coincides with the central line of the inner hole of the oil cylinder.
2. The spherical friction pair structure of a telescopic tilt cylinder type hydraulic motor according to claim 1, wherein the groove is an annular groove.
3. The spherical friction pair structure of a telescopic tilt cylinder type hydraulic motor according to claim 1, wherein the grooves are intermittent grooves.
4. A telescopic tilt cylinder hydraulic motor spherical friction pair structure according to claim 2 or 3, wherein the spherical section a occupies one quarter to one third of the width of the entire concave spherical surface.
5. The spherical friction pair structure of the telescopic tilt cylinder type hydraulic motor according to claim 1, wherein the depth h of the concave spherical groove is 0.5-0.8 mm.
6. The spherical friction pair structure of the telescopic tilt cylinder type hydraulic motor according to claim 1, wherein the spherical diameter of the spherical section B is 0.1-0.15 mm larger than that of the spherical section A.
7. The spherical friction pair structure of the telescopic tilt cylinder type hydraulic motor according to claim 1, wherein the spherical diameter of the convex spherical surface of the crankshaft is 0.2-0.3 mm larger than the spherical diameter of the spherical surface section A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201774.XU CN218913057U (en) | 2022-11-29 | 2022-11-29 | Spherical friction pair structure of telescopic swing cylinder type hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201774.XU CN218913057U (en) | 2022-11-29 | 2022-11-29 | Spherical friction pair structure of telescopic swing cylinder type hydraulic motor |
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| CN218913057U true CN218913057U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223201774.XU Active CN218913057U (en) | 2022-11-29 | 2022-11-29 | Spherical friction pair structure of telescopic swing cylinder type hydraulic motor |
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| CN (1) | CN218913057U (en) |
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2022
- 2022-11-29 CN CN202223201774.XU patent/CN218913057U/en active Active
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