CN219493268U - Bearing positioning structure for spiral hydraulic actuator and spiral hydraulic actuator - Google Patents
Bearing positioning structure for spiral hydraulic actuator and spiral hydraulic actuator Download PDFInfo
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- CN219493268U CN219493268U CN202320628213.3U CN202320628213U CN219493268U CN 219493268 U CN219493268 U CN 219493268U CN 202320628213 U CN202320628213 U CN 202320628213U CN 219493268 U CN219493268 U CN 219493268U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model provides a bearing positioning structure for a spiral hydraulic actuator and the spiral hydraulic actuator, relates to the technical field of hydraulic actuators, and aims to solve the technical problems that in the prior art, the existing spiral hydraulic actuator is usually fixed by tightly matching a bearing with a cylinder body, the bearing can move in the cylinder body due to overlarge matching precision, the locking force of the bearing is overlarge due to overlarge matching precision, and the service life of the bearing is shortened or the bearing is directly damaged. The positioning ring is used for limiting a piston on the transmission shaft and positioning one side of the outer ring of the bearing; two sides of the bearing inner ring are respectively positioned by shaft shoulders of the transmission shaft and the thrust ring; the rear guide sleeve is positioned on the other side of the bearing outer ring and is fixed on the cylinder body through a locking nut. According to the bearing positioning structure provided by the utility model, the matching precision with the deep groove ball bearing is not required to be obtained through the machining precision, and only the strength of the outer ring of the bearing is required to be checked to select a proper bearing model.
Description
Technical Field
The utility model relates to the technical field of hydraulic actuators, in particular to a bearing positioning structure for a spiral hydraulic actuator and the spiral hydraulic actuator.
Background
The action principle of the spiral hydraulic actuator is that hydraulic power oil is loaded on the section of a spiral piston through relative movement between two groups of large-helix-angle spiral pairs in a hydraulic shell, the piston is driven to rotate, and thrust on the loaded and piston is converted into shaft (flange) torque and angle output rotation through the internal spiral pairs. Because the large helix angle and the integral gear engagement are adopted, compared with the vane type and the gear rack type, the structure is compact, and the characteristics of higher torque output, high bearing capacity, shock resistance, zero leakage, flexible installation and the like can be realized. The rotary swing type actuator is widely applied to industries such as valve control, engineering machinery, automatic control, ships, agricultural machinery, instruments and meters and the like at present, and is suitable for being applied under the working condition that the installation space is limited, so that the rotary swing of the actuator is realized.
Because of the structural characteristics of the spiral swing cylinder, a thrust friction gasket or a thrust bearing is commonly used in the market at present as a transmission element, thrust load generated in the operation process is transmitted to the thrust friction plate or the thrust bearing, lubricating grease is required to be added into the thrust friction gasket periodically in the use process to ensure the normal action of the spiral actuator, periodic maintenance is required, and difficulty is increased to field maintenance; the thrust ball bearing or the thrust needle bearing is adopted in the conventional thrust bearing, all axial loads are born by the thrust bearing under the heavy load application working condition, the service life of the bearing is shortened or the bearing is directly damaged, the type of the thrust bearing is less, the domestic bearing is often selected to be a large-grade bearing, the overall dimension of the product is increased, the transmission efficiency is low in the two structural modes, the starting pressure is high in the running process of the actuator, and the pressure loss is high and the heating inside the actuator is serious (under the high-frequency action state).
The applicant found that the prior art has at least the following technical problems:
the positioning-free locking adjustment structure of the outer ring of the deep groove ball bearing is adopted, reasonable matching precision can be obtained only through machining precision, the bearing can move inside the cylinder body due to overlarge matching precision, the output angle is changed, the bearing is shortened in service life or damaged due to overlarge locking force caused by overlarge matching precision.
Disclosure of Invention
The utility model aims to provide a bearing positioning structure for a spiral hydraulic actuator and the spiral hydraulic actuator, so as to solve the technical problems that in the prior art, the existing spiral hydraulic actuator usually adopts the tight fit of a bearing and a cylinder body to realize the fixation of the bearing, the bearing can move in the cylinder body due to overlarge matching precision, the locking force of the bearing is overlarge due to overlarge matching precision, and the service life of the bearing is shortened or the bearing is directly damaged due to overlarge matching precision 。 The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a bearing positioning structure for a spiral hydraulic actuator, which comprises a positioning ring, a thrust ring, a rear guide sleeve and a lock nut, wherein the positioning ring and the thrust ring are sleeved on a transmission shaft of the spiral hydraulic actuator, and the positioning ring and the thrust ring are positioned on two sides of a bearing on the transmission shaft; the positioning ring is used for limiting a piston on the transmission shaft and positioning one side of the bearing outer ring; the two sides of the bearing inner ring are respectively positioned through the shaft shoulder of the transmission shaft and the thrust ring; the rear guide sleeve is sleeved on the outer ring of the thrust ring, the rear guide sleeve is positioned on the other side of the bearing outer ring, and the rear guide sleeve is fixed on the cylinder body of the spiral hydraulic actuator through the locking nut.
Further, the lock nut is sleeved on the rear guide sleeve, the end face of the lock nut is in contact with the step end face of the rear guide sleeve, and the external thread of the lock nut is matched with the corresponding internal thread on the cylinder body.
Further, the outer side face of the rear guide sleeve is in sealing fit with the inner side face of the cylinder body, the inner side face of the thrust ring is in sealing fit with the transmission shaft, and the rear guide sleeve is in sealing fit with the thrust ring.
Further, seal ring mounting grooves are formed in the outer circumferential side face of the rear guide sleeve, the inner side face of the rear guide sleeve and the outer circumferential side face of the rear guide sleeve, and seal rings are arranged in the seal ring mounting grooves.
Further, a guide ring mounting groove is formed in the inner side face of the rear guide sleeve, and the guide ring is sleeved in the guide ring mounting groove.
Further, a dust ring mounting groove is formed in the inner side face of the rear guide sleeve, and the dust ring is sleeved in the dust ring mounting groove.
Further, the thrust ring is in threaded connection with the drive shaft.
The utility model provides a spiral hydraulic actuator which comprises a cylinder body, a transmission shaft, a piston and a bearing positioning structure.
The technical scheme of the utility model can produce the following technical effects: by adopting the bearing positioning structure provided by the utility model, the axial load transmitted by the piston is applied to the end face of the positioning ring, the positioning ring is matched with the outer ring of the deep groove ball bearing, the outer ring of the other side of the deep groove ball bearing is matched with the rear guide sleeve, and the proper locking force is adjusted through the locking nut so as to ensure the optimal working state of the actuator. According to the bearing positioning structure provided by the utility model, the matching precision with the deep groove ball bearing is not required to be obtained through the machining precision, and the best working state of the actuator can be met only by checking the strength of the outer ring of the bearing to select a proper bearing model.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view in partial cross-section of a screw-type hydraulic actuator shown according to an exemplary embodiment;
fig. 2 is a partial enlarged view at a in fig. 1.
In the figure 1, a positioning ring; 2. a thrust collar; 3. a rear guide sleeve; 4. a lock nut; 5. a transmission shaft; 6. a bearing; 7. a piston; 8. a cylinder; 9. a seal ring; 10. a guide ring; 11. a dust ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.
Referring to fig. 1, the utility model provides a bearing positioning structure for a spiral hydraulic actuator, which comprises a positioning ring 1, a thrust ring 2, a rear guide sleeve 3 and a lock nut 4, wherein the positioning ring 1 and the thrust ring 2 are sleeved on a transmission shaft 5 of the spiral hydraulic actuator, and the positioning ring 1 and the thrust ring 2 are positioned on two sides of a bearing 6 on the transmission shaft 5; the positioning ring 1 is used for limiting a piston 7 on the transmission shaft 5 and positioning one side of an outer ring of the bearing 6; two sides of the inner ring of the bearing 6 are respectively positioned by shaft shoulders of the transmission shaft 5 and the thrust ring 2; the rear guide sleeve 3 is sleeved on the outer ring of the thrust ring 2, the rear guide sleeve 3 is positioned on the other side of the outer ring of the bearing 6, and the rear guide sleeve 3 is fixed on the cylinder body 8 of the spiral hydraulic actuator through the lock nut 4.
In fig. 1, a positioning ring 1, a thrust ring 2, a rear guide sleeve 3 and a lock nut 4 are schematically shown, and when the thrust ring 2 is fixed on a transmission shaft 5, the inner ring of the deep groove ball bearing can be limited by the shaft shoulder of the transmission shaft 5 and the thrust ring 2. The axial load transmitted by the piston 7 is applied to the end face of the positioning ring 1, the positioning ring 1 is matched with the outer ring of the deep groove ball bearing, the outer ring of the other side of the deep groove ball bearing is matched with the rear guide sleeve 3, and the proper locking force is adjusted through the locking nut 4 so as to ensure the optimal working state of the actuator.
According to the bearing positioning structure provided by the utility model, the matching precision with the deep groove ball bearing is not required to be obtained through the machining precision, the best working state of the actuator can be met by only checking the strength of the outer ring of the bearing to select the proper bearing type, and the sliding element in the bearing can be ensured to be in the normal working state because the transmission shaft is free from axial load in normal use.
Regarding the specific cooperation of the lock nut 4 and the rear guide bush 3, the structure is as follows: the lock nut 4 is sleeved on the rear guide sleeve 3, the end face of the lock nut 4 is contacted with the step end face of the rear guide sleeve 3, and the external thread of the lock nut 4 is matched with the corresponding internal thread on the cylinder body 8. Referring to fig. 1 and 2, the outer side of the rear guide sleeve 3 is stepped, the rear guide sleeve 3 includes a first section and a second section connected to the first section, the diameter of the first section is smaller than that of the second section, the lock nut 4 is sleeved on the first section, and the end surface of the lock nut 4 contacts with the stepped end surface formed by the first section and the second section. The proper locking force is adjusted by the locking nut 4 to ensure the optimal working state of the actuator.
The outer side surface of the rear guide sleeve 3 is in sealing fit with the inner side surface of the cylinder body 8, the inner side surface of the thrust ring 2 is in sealing fit with the transmission shaft 5, and the rear guide sleeve 3 is in sealing fit with the thrust ring 2, so that pressure oil in the cylinder body is prevented from leaking out from the side.
Regarding the sealing fit, concretely, seal ring mounting grooves are provided on the outer circumferential side surface of the rear guide sleeve 3, on the inner side surface of the rear guide sleeve 3, and on the outer circumferential side surface of the rear guide sleeve 3, and seal rings 9 are provided in the seal ring mounting grooves. Referring to fig. 1, a seal ring 9 is provided on the second section of the rear guide bush 3 for sealing engagement of the outer side surface of the rear guide bush 3 with the inner side surface of the cylinder 8.
Further, a guide ring installation groove is formed in the inner side face of the rear guide sleeve 3, and a guide ring 10 is sleeved in the guide ring installation groove. The inner side surface of the rear guide sleeve 3 is provided with a dust ring mounting groove, and the dust ring 11 is sleeved in the dust ring mounting groove. Referring to fig. 1, a guide ring 10, a seal ring 9 and a dust ring 11 are schematically shown between the rear guide sleeve 3 and the thrust ring 2.
Regarding the connection of the thrust ring 2 to the drive shaft 5, the thrust ring 2 is screwed to the drive shaft 5. The threaded connection is convenient to operate, and the threaded connection has a sealing effect.
The utility model provides a spiral hydraulic actuator, which comprises a cylinder body 8, a transmission shaft 5, a piston 7 and a bearing positioning structure provided by the utility model. The bearing positioning structure comprises a positioning ring 1, a thrust ring 2, a rear guide sleeve 3 and a locking nut 4, wherein the positioning ring 1 and the thrust ring 2 are sleeved on a transmission shaft 5 of the spiral hydraulic actuator, and the positioning ring 1 and the thrust ring 2 are positioned on two sides of a bearing 6 on the transmission shaft 5; the positioning ring 1 is used for limiting a piston 7 on the transmission shaft 5 and positioning one side of an outer ring of the bearing 6; two sides of the inner ring of the bearing 6 are respectively positioned by shaft shoulders of the transmission shaft 5 and the thrust ring 2; the rear guide sleeve 3 is sleeved on the outer ring of the thrust ring 2, the rear guide sleeve 3 is positioned on the other side of the outer ring of the bearing 6, and the rear guide sleeve 3 is fixed on the cylinder body 8 of the spiral hydraulic actuator through the lock nut 4.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.
In the description of the present specification, a description referring to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "one example" etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (8)
1. The bearing positioning structure for the spiral hydraulic actuator is characterized by comprising a positioning ring (1), a thrust ring (2), a rear guide sleeve (3) and a locking nut (4), wherein,
the positioning ring (1) and the thrust ring (2) are sleeved on a transmission shaft (5) of the spiral hydraulic actuator, and the positioning ring (1) and the thrust ring (2) are positioned on two sides of a bearing (6) on the transmission shaft (5); the positioning ring (1) is used for limiting a piston (7) on the transmission shaft (5) and positioning one side of an outer ring of the bearing (6); two sides of the inner ring of the bearing (6) are respectively positioned through the shaft shoulder of the transmission shaft (5) and the thrust ring (2); the rear guide sleeve (3) is sleeved on the outer ring of the thrust ring (2), the rear guide sleeve (3) is positioned on the other side of the outer ring of the bearing (6), and the rear guide sleeve (3) is fixed on a cylinder body (8) of the spiral hydraulic actuator through the locking nut (4).
2. The bearing positioning structure for a spiral hydraulic actuator according to claim 1, wherein the lock nut (4) is sleeved on the rear guide sleeve (3), the end face of the lock nut (4) is in contact with the step end face of the rear guide sleeve (3), and the external thread of the lock nut (4) is matched with the corresponding internal thread on the cylinder body (8).
3. The bearing positioning structure for a screw-type hydraulic actuator according to claim 1, wherein an outer side surface of the rear guide sleeve (3) is in sealing engagement with an inner side surface of the cylinder body (8), an inner side surface of the thrust ring (2) is in sealing engagement with the transmission shaft (5), and the rear guide sleeve (3) is in sealing engagement with the thrust ring (2).
4. A bearing positioning structure for a screw-type hydraulic actuator according to claim 3, wherein seal ring mounting grooves are provided on the outer circumferential side surface of the rear guide bush (3), on the inner side surface of the rear guide bush (3), and on the outer circumferential side surface of the rear guide bush (3), and seal rings (9) are provided in each seal ring mounting groove.
5. The bearing positioning structure for a spiral hydraulic actuator according to claim 1, wherein a guide ring mounting groove is formed in the inner side surface of the rear guide sleeve (3), and the guide ring (10) is sleeved in the guide ring mounting groove.
6. The bearing positioning structure for a spiral hydraulic actuator according to claim 1, wherein a dust ring mounting groove is formed in the inner side surface of the rear guide sleeve (3), and the dust ring (11) is sleeved in the dust ring mounting groove.
7. Bearing positioning structure for a screw-type hydraulic actuator according to claim 1, characterized in that the thrust ring (2) is screwed with the drive shaft (5).
8. A screw-type hydraulic actuator, characterized by comprising a cylinder (8), a drive shaft (5), a piston (7) and a bearing (6) positioning structure according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628213.3U CN219493268U (en) | 2023-03-27 | 2023-03-27 | Bearing positioning structure for spiral hydraulic actuator and spiral hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628213.3U CN219493268U (en) | 2023-03-27 | 2023-03-27 | Bearing positioning structure for spiral hydraulic actuator and spiral hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219493268U true CN219493268U (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320628213.3U Active CN219493268U (en) | 2023-03-27 | 2023-03-27 | Bearing positioning structure for spiral hydraulic actuator and spiral hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219493268U (en) |
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2023
- 2023-03-27 CN CN202320628213.3U patent/CN219493268U/en active Active
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