Single-speed hydraulic motor

Abstract

The utility model relates to the technical field of hydraulic transmission, in particular to a single-speed hydraulic motor with optimized structural design and efficient oil transportation compensation capacity. The utility model provides a single-speed type hydraulic motor which comprises a fixed shell, a hydraulic cylinder and a hydraulic cylinder. The valve bank shell is fixedly arranged on one side of the fixed shell through bolts, and a first oil port and a second oil port are formed in the valve bank shell and used for hydraulic oil inlet and outlet and adjustment of the rotating direction; the rotating disc is nested on the other side of the fixed shell through a bearing, and one side of the rotating disc is sequentially connected with an oil distribution disc, a stator and a rear cover in an abutting mode; the linkage shaft is located at the axis position of a hollow cavity formed by the rotating disc, the oil distribution disc and the stator; the oil distribution sleeve is located at the position, connected with a spline of the linkage shaft, in the rotating disc; the rotor is positioned in the stator and is in spline connection with the linkage shaft; the roller pin is positioned between the stator and the rotor; the hydraulic motor is simplified to be of a single-speed structure, so that the overall performance and reliability of the hydraulic motor are improved while the manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of hydraulic transmission technology, and in particular to a single-speed hydraulic motor with optimized structural design and efficient oil delivery compensation capability. Background Technology

[0002] In the field of hydraulic transmission technology, hydraulic motors, as important actuators that convert hydraulic energy into mechanical energy, are widely used in various industrial equipment, engineering machinery, ships, aerospace and other fields. Single-speed hydraulic motors, with their simple structure and stable performance, have been widely used in some applications where the speed requirement is relatively fixed.

[0003] To meet certain performance requirements, some existing hydraulic motors have adopted overly complex structural designs, increasing the number of parts and the difficulty of processing, resulting in high manufacturing costs. At the same time, the complex structure also increases the failure rate of the equipment and reduces its reliability. Utility Model Content

[0004] The problem this application aims to solve is that existing hydraulic motors employ overly complex structural designs to meet certain performance requirements, resulting in increased manufacturing costs and failure rates.

[0005] To address the aforementioned technical problems, this application provides a single-speed hydraulic motor, comprising a fixed housing serving as a foundation support; a valve assembly housing, bolted to one side of the fixed housing, with a first oil port and a second oil port arranged inside for the inlet and outlet of hydraulic oil and adjustment of the rotation direction; a rotating disc, nested with bearings on the other side of the fixed housing, with a distribution plate, a stator, and a rear cover sequentially abutting against each other on one side; a linkage shaft located at the axial center of the hollow cavity formed by the rotating disc, the distribution plate, and the stator; a distribution sleeve located inside the rotating disc at a splined connection to the linkage shaft; a rotor located inside the stator at a splined connection to the linkage shaft; and a needle roller located between the stator and the rotor.

[0006] Because the hydraulic motor of this application is designed with a single-speed valve assembly housing having a first oil port and a second oil port, by simplifying the hydraulic motor to a single-speed structure, the overall performance and reliability of the hydraulic motor are improved while reducing manufacturing costs. This solves the problem that existing hydraulic motors use overly complex structural designs to meet certain performance requirements, which leads to increased manufacturing costs and failure rates.

[0007] Compared with existing technologies, this utility model has the following advantages: by rationally designing the structure and connection method of each component, the number of parts is reduced, the processing difficulty is lowered, and the overall structure is simplified. At the same time, while ensuring performance, manufacturing costs are reduced, the reliability of the equipment is improved, and the problems of complex structure and high manufacturing cost in existing technologies are solved. Attached Figure Description

[0008] Figure 1 This is a side view of the structure of an embodiment.

[0009] Figure 2 This is a front view structural diagram of an embodiment.

[0010] Figure 3 This is a cross-sectional structural diagram of an embodiment.

[0011] Figure 4 This is a schematic diagram of the cross-sectional structure of the valve assembly housing.

[0012] Figure 5 This is a schematic diagram of the structure of seven needle rollers.

[0013] Figure 6 This is a schematic diagram of the structure of nine needle rollers.

[0014] Figure 7 This is a schematic diagram of the fixed shell structure.

[0015] Figure 8 for Figure 3 A schematic diagram of the structure at point A in the middle.

[0016] Figure 9 for Figure 3 A schematic diagram of the structure at point B.

[0017] In the diagram: 1. Valve housing; 2. Fixed housing; 3. Rotating disc; 4. Oil distribution disc; 5. Stator; 6. Rear cover; 7. Oil distribution sleeve; 8. Linkage shaft; 9. Rotor; 10. Needle roller; 11. Bushing; 12. Bearing; 13. First oil port; 14. Second oil port; 15. Sealing ring; 16. First sealing ring; 17. Outer sleeve; 18. Inner sleeve; 19. Spring; 20. Second sealing ring; 21. Rubber gasket; 22. Third oil passage; 23. First oil passage; 24. Second oil passage. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0019] The single-speed hydraulic motor in this embodiment is designed to achieve efficient and stable hydraulic power output. By optimizing the connection and coordination of various components, the motor's sealing performance, oil supply compensation capability, and operational reliability are improved. The specific structural composition, working principle, and usage of this hydraulic motor will be described in detail below. Figure 1-9 As shown, the hydraulic motor mainly includes key components such as a fixed housing 2, a valve assembly housing 1, a rotating disc 3, a distribution disc 4, a stator 5, a rear cover 6, a linkage shaft 8, a distribution sleeve 7, a rotor 9, and a bushing 11.

[0020] The fixed housing 2 serves as the basic support structure for the entire hydraulic motor. One side of it is connected to the valve assembly housing 1 by bolts. Inside the valve assembly housing 1, the first oil port 13 and the second oil port 14 are arranged side by side. These two oil ports are used for the inlet and outlet of hydraulic oil, respectively. When the first oil port 13 is used as the oil inlet, the hydraulic motor rotates clockwise; when the second oil port 14 is used as the oil inlet, the hydraulic motor rotates counterclockwise. This design allows the hydraulic motor to flexibly adjust the rotation direction according to actual needs.

[0021] The other side of the fixed shell 2 is nested with the rotating disk 3 via the bearing 12. On one side of the rotating disk 3, the oil distribution plate 4, the stator 5 and the rear cover 6 are sequentially abutted against each other. The upper part of the rear cover 6 is evenly and spaced in the circumferential direction with bolts that penetrate the oil distribution plate 4 and the stator 5 and are connected to the rotating disk 3. This connection method ensures the stability and sealing between the components. The rotating disk 3, the oil distribution plate 4 and the stator 5 form a hollow cavity. The linkage shaft 8 is arranged at the axial position inside the cavity.

[0022] The upper part of the linkage shaft 8 is located at the position of the rotating disk 3 and is equipped with an oil distribution sleeve 7 that is splined to it. The oil distribution sleeve 7 and the rotating disk 3 are concentrically arranged and can rotate freely in the circumferential direction. The upper part of the linkage shaft 8 is located at the position of the stator 5 and is equipped with a rotor 9 that is splined to it. A bushing 11 is arranged between the rotor 9 and the oil distribution plate 4. The design of the bushing 11 is crucial for improving the oil delivery performance and sealing performance of the hydraulic motor.

[0023] The stator 5 has outwardly recessed semi-circular slots evenly and at intervals along its circumference. The rotor 9 has inwardly recessed arc-shaped toothed grooves evenly and at intervals along its circumference. Cylindrical needle rollers 10 are arranged in the slots. The number of needle rollers 10 is one more than the number of toothed grooves. In this embodiment, there are seven or nine needle rollers 10. This design allows the toothed grooves to intermittently contact the surface of the needle rollers 10 during the rotation of the rotor 9, thereby driving the needle rollers 10 to reciprocate up and down in the slots of the stator 5 to realize the flow operation of hydraulic oil.

[0024] To improve the sealing performance between the rotating disk 3 and the fixed shell 2, a sealing ring 15 and a first sealing ring 16 are arranged between the rotating disk 3 and the fixed shell 2 to provide axial sealing. The cross-section of the sealing ring 15 is ridge-shaped, which helps to enhance the sealing effect. The first sealing ring 16 is O-shaped and symmetrically arranged on both sides of the sealing ring 15, which further improves the sealing performance and prevents hydraulic oil leakage.

[0025] Multiple cylindrical first oil passages 23 are arranged side by side on the upper part of the outer side wall of the fixed housing 2, and multiple arc-shaped grooved second oil passages 24 are arranged side by side on the upper part of the inner side wall of the fixed housing 2. The first oil passages 23 and the second oil passages 24 are connected one by one. This design allows hydraulic oil to flow smoothly between the oil passages, ensuring the normal operation of the hydraulic motor.

[0026] The bushing 11 is divided into an outer sleeve 17 and an inner sleeve 18. The outer sleeve 17 has countersunk holes evenly spaced on its surface. The inner sleeve 18, which can slide back and forth, is fitted inside the countersunk holes. A spring 19 is arranged in the countersunk holes to abut against the inner sleeve 18. The surface of the inner sleeve 18 is provided with a groove. A second sealing ring 20 and a rubber gasket 21 are fitted inside the groove to enhance the sealing performance. A third oil passage 22 for supplying oil is opened in the center of the inner sleeve 18. This design allows the inner sleeve 18 to move dynamically along the axis of the outer sleeve 17 with the help of the spring 19, realizing oil supply compensation operation. When the hydraulic oil flow or pressure changes, the inner sleeve 18 can automatically adjust its position to ensure a stable supply of hydraulic oil and improve the operating stability of the hydraulic motor.

[0027] Working principle: When hydraulic oil enters the hydraulic motor from the first oil port 13 or the second oil port 14, it passes through the first oil passage 23 and the second oil passage 24 of the fixed housing 2 and enters the cavity formed by the rotating disk 3, the distribution disk 4 and the stator 5. Driven by the linkage shaft 8, the rotor 9 starts to rotate, and the tooth grooves make intermittent contact with the surface of the needle roller 10, driving the needle roller 10 to reciprocate up and down in the slot of the stator 5. During this process, the hydraulic oil flows in the cavity and is compensated for by the third oil passage 22 of the bushing 11 to ensure a stable supply of hydraulic oil. Finally, the hydraulic oil is discharged from the other oil port, completing the power output of the hydraulic motor.

[0028] Instructions for use: Secure the hydraulic motor housing 2 to the predetermined installation position with bolts, ensuring a firm fixation. Connect the valve assembly housing 1 to the housing 2 with bolts, ensuring that the direction of the first oil port 13 and the second oil port 14 is consistent with the direction of the hydraulic system's oil pipe connection. Check the tightness of the connections between the rotating disc 3, the distribution disc 4, the stator 5, and the rear cover 6, ensuring the sealing between each component. Connect the hydraulic system's oil pipes to the first oil port 13 and the second oil port 14 of the valve assembly housing 1, ensuring that the oil pipe connections are secure to prevent oil leakage.

[0029] Before starting the hydraulic system, open the hydraulic system's vent valve to purge air from the oil pipes and inside the hydraulic motor. Start the hydraulic system and allow hydraulic oil to enter the hydraulic motor through the first port 13 or the second port 14. Observe whether the rotation direction of the hydraulic motor meets the requirements. If not, the rotation direction can be adjusted by changing the inlet port. Gradually increase the pressure of the hydraulic system and observe the operation of the hydraulic motor. Check for abnormal noise, vibration, or oil leakage. If any abnormality is found, stop the machine immediately for inspection. During the normal operation of the hydraulic motor, regularly check the temperature and pressure of the hydraulic oil to ensure that they are within the normal range. At the same time, check the wear of vulnerable parts such as the sealing ring 15, the first sealing ring 16, and the bushing 11. Replace them promptly if wear is found.

[0030] When the hydraulic system needs to be shut down, first gradually reduce the pressure of the hydraulic system. After the hydraulic motor stops rotating, turn off the power to the hydraulic system and close the oil pipe valves of the hydraulic system to prevent hydraulic oil leakage. Regularly maintain and service the hydraulic motor, clean external dust and debris, and check whether the connecting bolts of each component are loose. If any are loose, tighten them in time.

[0031] In summary, the single-speed hydraulic motor of this embodiment achieves efficient and stable hydraulic power output and improves sealing and oil supply compensation capabilities by optimizing the structural design and connection method of each component. At the same time, the detailed usage method provides users with guidance on installation, commissioning, operation and maintenance, ensuring that the hydraulic motor can perform at its best in practical applications.

[0032] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0033] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0034] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A single speed hydraulic motor characterized by: Comprising A fixed shell for basic support; A valve group shell arranged on one side of the fixed shell by bolts, with a first oil port and a second oil port arranged inside for the inlet and outlet of hydraulic oil and adjustment of the rotation direction; A rotating disc arranged on the other side of the fixed shell by bearings, with an oil distribution disc, a stator and a rear cover successively abutting on one side; A linkage shaft located at the center of the hollow cavity formed by the rotating disc, the oil distribution disc and the stator; An oil distribution sleeve located inside the rotating disc and connected with the linkage shaft by splines; A rotor located inside the stator and connected with the linkage shaft by splines; Rolling needles located between the stator and the rotor.

2. The single speed type hydraulic motor according to claim 1, characterized by: The stator is uniformly and interval arranged with semicircular notches outwardly recessed along the circumference, and the rotor is uniformly and interval arranged with circular arc tooth grooves inwardly recessed along the circumference.

3. The single speed type hydraulic motor according to claim 2, characterized by: The number of cylindrical rolling needles arranged in the notches is one more than that of the tooth grooves.

4. The single speed type hydraulic motor according to claim 1, characterized by: A bushing is arranged between the rotor and the oil distribution disc, which is divided into an outer sleeve and an inner sleeve, and the outer sleeve is uniformly and interval provided with countersunk holes on the surface, and the inner sleeve is sleeved in the countersunk holes and can slide reciprocally.

5. The single speed type hydraulic motor according to claim 4, characterized by: A spring is arranged in the countersunk hole and abuts against the inner sleeve, so that the inner sleeve moves along the axis of the outer sleeve by the spring to realize oil compensation.

6. The single speed type hydraulic motor according to claim 4, characterized by: The inner sleeve is provided with a groove on the surface, a second sealing ring and a rubber pad are sleeved in the groove, and a third oil channel for oil flow is arranged in the center of the inner sleeve.

7. The single speed type hydraulic motor according to claim 1, characterized by: A sealing ring and a first sealing ring are arranged between the rotating disc and the fixed shell, the cross section of the sealing ring is ridge-shaped, and the first sealing ring is O-shaped and symmetrically arranged on both sides of the sealing ring.

8. The single speed type hydraulic motor according to claim 1, characterized by: A plurality of straight cylindrical first oil channels are arranged side by side on the upper part of the outer side wall of the fixed shell, a plurality of arc groove-shaped second oil channels are arranged side by side on the upper part of the inner side wall of the fixed shell, and the first oil channels and the second oil channels are connected one by one.

9. The single speed type hydraulic motor according to claim 1, characterized by: The number of rolling needles is seven or nine.

10. The single speed type hydraulic motor according to claim 1, characterized by: A plurality of bolts are uniformly and interval arranged on the upper part of the rear cover in the circumferential direction, which penetrate the oil distribution disc, the stator and are connected with the rotating disc.

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