A 180° rotating hydraulic drive motor

Abstract

The application discloses a 180-degree rotation hydraulic drive motor, which comprises a front cover, a rear cover and a stator shell installed between the front cover and the rear cover, a rotor shaft is rotatably installed on the front cover and the rear cover and penetrates through the front cover, the rear cover and the stator shell, a pair of symmetrical stator vanes are fixedly connected to the inner wall of the stator shell, one end of the rotor shaft on the inner side of the stator shell is fixedly connected with a pair of symmetrical rotor vanes, and each rotor vane is in close contact with the corresponding stator vane. The hydraulic energy is directly converted into rotary motion by adopting the double-vane swing structure, and no additional speed reduction or transmission mechanism is needed, so that the overall volume is small, the weight is light and the motor is convenient to install and arrange in a space-limited occasion. The stator vanes and the rotor vanes are provided with elastic sealing structures, the sealing structure of the rotor vane is automatically pressed against the working surface under the action of high-pressure oil, the internal leakage can be effectively reduced, and the volumetric efficiency and the output torque stability are improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic motor technology, and more particularly to a 180° rotating hydraulic drive motor. Background Technology

[0002] Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, engineering machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemicals, port machinery, etc.

[0003] Traditional hydraulic motors are mostly of continuous rotational structure, such as cycloidal hydraulic motors and piston hydraulic motors, whose output shafts can rotate continuously for more than 360°. However, in many practical applications, the actuator only needs to oscillate or rotate within a limited angular range (such as 90° or 180°), such as gripper flipping, gate opening and closing, and work platform flipping.

[0004] To address the aforementioned needs, existing technologies typically employ the following two solutions: First, a continuous rotating hydraulic motor is used in conjunction with a mechanical limiting device or a reduction mechanism to achieve limited-angle rotation. However, this solution is complex in structure, bulky in size, and suffers from significant limiting impact, making it difficult to guarantee the accuracy of angle control. Second, a hydraulic swing cylinder (swing motor) is used, which directly converts hydraulic energy into rotational motion at a limited angle through blades or pistons.

[0005] However, while some current motors using hydraulic cylinders in conjunction with rotating arms can achieve 180° rotation, they suffer from drawbacks such as insufficient structural compactness and the need for two hydraulic cylinders to work together, increasing system complexity and installation space. In addition, existing swing motors generally suffer from problems such as insufficient sealing performance leading to serious internal leakage and large fluctuations in output torque during operation, especially at both ends of the 180° rotation stroke, where the limit impact phenomenon is particularly prominent. Therefore, a 180° rotation hydraulic drive motor is proposed to solve the above problems. Summary of the Invention

[0006] (a) Purpose of the invention

[0007] To address the technical problems existing in the background art, this invention proposes a 180° rotating hydraulic drive motor, which has the advantages of compact structure, reliable sealing, stable operation, light weight, and long service life. It solves the problem that the existing swing motor structure is not compact enough, which increases the system complexity and installation space.

[0008] (II) Technical Solution This invention provides a 180° rotating hydraulic drive motor, comprising: a front cover, a rear cover, and a stator housing installed between the front cover and the rear cover, wherein rotor shafts are rotatably mounted on the front cover and the rear cover, respectively penetrating the front cover, the rear cover, and the stator housing; A pair of symmetrically distributed stator blades are fixedly connected to the inner wall of the stator housing; The rotor shaft is fixedly connected to a pair of symmetrically distributed rotor blades at one end inside the stator housing, and each rotor blade and its corresponding stator blade are in contact with each other. The contacting stator blade and rotor blade divide the cavity of the stator housing into a first working cavity and a second working cavity. The rear cover and stator housing are equipped with oil injection components for conveying hydraulic oil; The oil filling component includes an oil guide pipe fixedly connected to the rear cover. The oil guide pipe is U-shaped. The end of the oil guide pipe away from the rear cover is fixedly connected to an oil supply pipe through a three-way valve. A pair of return pipes are fixedly connected to the middle of the oil guide pipe. A first vent pipe is fixedly connected to the return pipe near the first working chamber. A second vent pipe is fixedly connected to the bottom end of the stator housing, and the second vent pipe is connected to the second working chamber on the stator housing. Solenoid valves are installed on one end of the oil guide pipe connected to the rear cover, one end of the return pipe connected to the oil guide pipe, the connection end of the first vent pipe and its corresponding return pipe, and the second vent pipe. The stator housing and the rear cover are provided with oil guide channels that communicate with the oil guide pipe, the top rotor blade, and the top stator blade, respectively. The rotor blades and stator blades are equipped with sealing components.

[0009] Preferably, the side of each stator blade away from its corresponding rotor blade is concave, and the specifications of the concave part of each stator blade are adapted to the specifications of the rotor blade.

[0010] Preferably, the oil guide channel consists of a pair of first oil inlets and a pair of second oil inlets. The pair of first oil inlets are opened on the stator housing at one end near the oil guide pipe, and the pair of second oil inlets are opened on the rear cover at one end near the oil guide pipe. One end of each pair of second oil inlets is connected to the end of the oil guide pipe near the rear cover, while the ends of each pair of second oil inlets away from the oil guide pipe are connected to the ends of each pair of first oil inlets near the oil guide pipe.

[0011] Preferably, the top stator blade has an oil guide port on the side near the first oil inlet hole, and the oil guide port is connected to the first oil inlet hole near the first working chamber of a pair of first oil inlets.

[0012] Preferably, an air vent is provided on the side of the bottom stator blade near the second air vent, and a Y-shaped air hole is provided at the end of the stator housing near the second air vent. The Y-shaped air hole is connected to the air vent, the second air vent, and the first working chamber.

[0013] Preferably, the sealing assembly includes a flexible sealing frame fixedly connected to the middle of the outer surface of each rotor blade and to the outer surface of each stator blade near its corresponding rotor blade. Each rotor blade has an oil guide hole on the side near its corresponding stator blade. The oil guide hole is convex in shape. Each rotor blade has an oil guide cavity in the middle, and the oil guide cavity on each rotor blade is connected to the oil guide hole. Each rotor blade has a first through hole on the side near the front cover and the rear cover. Each rotor blade has a second through hole on the side away from the rotor shaft, and the first through hole and the second through hole on each rotor blade are connected to the oil guide cavity. A spring sheet is fixedly connected between the inner side of each flexible sealing frame and the inner side of its corresponding oil guide cavity.

[0014] Preferably, the oil guide hole on the top rotor blade is connected to the first oil inlet hole on the side away from the top stator blade, while the oil guide hole on the bottom rotor blade is located in the first working chamber.

[0015] Preferably, the front cover, stator housing, and rear cover are each provided with a plurality of mounting holes that are distributed in an annular pattern at equal intervals. The stator housing, stator blades, rotor shaft, and rotor blades are all made of ultra-high molecular weight polyethylene and carbon fiber composite molding material, wherein, by weight percentage, ultra-high molecular weight polyethylene accounts for 88% to 90%, and carbon fiber accounts for 10% to 12%.

[0016] Preferably, the oil injection component further includes a diverter pipe, which is fixedly connected to a section of the oil supply pipe away from the oil guide pipe via a three-way valve.

[0017] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: 1. This invention adopts a double-blade oscillating structure, which directly converts hydraulic energy into rotational motion without the need for additional deceleration or transmission mechanisms. It is small in size and light in weight, making it easy to install and arrange in space-constrained situations.

[0018] 2. In this invention, both the stator blades and rotor blades are provided with elastic sealing structures. Under the action of high-pressure oil, the sealing structure of the rotor blades automatically presses against the working surface, which can effectively reduce internal leakage and improve volumetric efficiency and output torque stability.

[0019] 3. This invention achieves uniform rotation of the output shaft by alternating oil intake and discharge in two working chambers; by switching the oil intake and discharge directions, the output shaft can rotate in both directions, meeting the bidirectional drive requirements under different working conditions, without the need for an additional reversing mechanism.

[0020] 4. In this invention, the stator blades and stator housing, as well as the rotor blades and rotor shaft, all adopt an integrated structure, which reduces the number of parts, simplifies the assembly process, and effectively reduces manufacturing costs. The output shaft and rotor blades are integrally formed by hot die casting, and the housing is made of ultra-high molecular weight polyethylene and carbon fiber composite molding material (UHMWPE content 88%~90%, carbon fiber content 10%~12%). Compared with traditional metal materials, this composite material can reduce weight by more than 50%, increase service life by 6 times, and facilitate quick loading, unloading and maintenance on site. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a three-dimensional sectional view of the overall structure of the present invention; Figure 4 This is a schematic diagram showing the connection between the rear cover and the liquid guide tube of the present invention; Figure 5 This is a three-dimensional sectional view of the rotor blade structure of the present invention.

[0022] Reference numerals: 1. Front cover; 2. Stator housing; 21. Stator blade; 22. First working chamber; 23. Second working chamber; 24. Sealing groove; 3. Rear cover; 4. Rotor shaft; 41. Rotor blade; 411. Sealing frame; 412. Oil guide hole; 413. First through hole; 414. Spring plate; 415. Oil guide cavity; 416. Second through hole; 5. Oil injection component; 51. Oil guide pipe; 52. Oil supply pipe; 53. Diverter pipe; 54. Return pipe; 55. First vent pipe; 56. Second vent pipe; 57. First oil inlet hole; 58. Second oil inlet hole; 6. Mounting hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0024] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Example 1: like Figure 1-5 As shown, the present invention proposes a 180° rotating hydraulic drive motor, comprising: a front cover 1, a rear cover 3, and a stator housing 2 installed between the front cover 1 and the rear cover 3, wherein a rotor shaft 4 is rotatably mounted on the front cover 1 and the rear cover 3 respectively penetrating the front cover 1, the rear cover 3, and the stator housing 2. A pair of symmetrically distributed stator blades 21 are fixedly connected to the inner wall of the stator housing 2; A pair of symmetrically distributed rotor blades 41 are fixedly connected to one end of the rotor shaft 4 located inside the stator housing 2. Each rotor blade 41 and its corresponding stator blade 21 are in contact with each other. The contacting stator blade 21 and rotor blade 41 divide the cavity of the stator housing 2 into a first working cavity 22 and a second working cavity 23. The rear cover 3 and the stator housing 2 are equipped with oil injection components 5 for conveying hydraulic oil.

[0027] In this invention, hydraulic oil is supplied to the first working chamber 22 and the second working chamber 23 through the oil injection component 5, which is used to drive the top rotor blade 41 and the bottom rotor blade 41 to rotate axially in the stator housing 2, thereby driving the rotor shaft 4 to reciprocate between 0° and 180° around its axis.

[0028] It should be noted that the front cover 1, the stator housing 2, and the rear cover 3 are all provided with several mounting holes 6 that are distributed in a ring at equal intervals. The front cover 1, the stator housing 2, and the rear cover 3 are installed and fixed by bolts through the mounting holes 6. A sealing ring is fixedly connected to the side of the stator housing 2 near the rear cover 3 and the front cover 1. Both the front cover 1 and the rear cover 3 are provided with sealing grooves 24 for the sealing ring to extend on the side near the housing 2. The rotor shaft 41 passes through a section of the front cover 1 and the rear cover 3 and is rotatably connected to the front cover 1 and the rear cover 3 through sealed bearings to prevent the oil in the working chamber from leaking along the rotor shaft 4 axially. The stator housing 2, stator blades 21, rotor shaft 4 and rotor blades 41 are all made of ultra-high molecular weight polyethylene and carbon fiber composite molding material. By weight percentage, ultra-high molecular weight polyethylene accounts for 88%~90% and carbon fiber accounts for 10%~12%. Compared with traditional materials, this material reduces the weight by more than 50%, increases the service life by 6 times, and facilitates quick loading and unloading. The rotor shaft 4 and rotor blades 41 are integrally formed, the stator housing 2 and stator blades 21 are integrally formed, and the shaft section of the rotor shaft 4 located on the side of the rear cover 3 is a hollow shaft structure, which effectively reduces the overall weight while ensuring the strength of the output shaft.

[0029] In an optional embodiment, the oil filling component 5 includes an oil guide pipe 51 fixedly connected to the rear cover 3. The oil guide pipe 51 is U-shaped. One end of the oil guide pipe 51 away from the rear cover 3 is fixedly connected to an oil supply pipe 52 through a three-way valve. A pair of return pipes 54 are fixedly connected to the middle of the oil guide pipe 51. A first vent pipe 55 is fixedly connected to the return pipe 54 near the first working chamber 22. A second vent pipe 56 is fixedly connected to the bottom end of the stator housing 2, and the second vent pipe 56 is connected to the second working chamber 23 on the stator housing 2. Solenoid valves are installed on one end of the oil guide pipe 51 connected to the rear cover 3, one end of the return pipe 54 connected to the oil guide pipe 51, the connection end of the first vent pipe 55 and its corresponding return pipe 54, and the second vent pipe 56. A buffer valve or throttling device is provided on the section of the return pipe 54 away from the oil guide pipe 51, which can effectively absorb the impact energy when rotating to the end position and ensure smooth start and stop. The stator housing 2 and the rear cover 3 are provided with oil guide channels that are respectively connected to the oil guide pipe 51, the top rotor blade 41, and the top stator blade 21. The rotor blades 41 and stator blades 21 are equipped with sealing components.

[0030] In this embodiment, since the oil guide pipe 51 is U-shaped, the oil supply pipe 52 guides the hydraulic oil into the oil guide pipe 51. By opening the solenoid valve at one end of the oil guide pipe 51 corresponding to the second working chamber 23, the hydraulic oil is transported through the end of the oil guide pipe 51 corresponding to the second working chamber 23 to the second working chamber 23 of the stator housing 2, so as to push the top rotor blade 41 to rotate away from its corresponding stator blade 21, thereby driving the rotor shaft 4 to rotate counterclockwise. At this time, the bottom rotor blade 41 also rotates away from its corresponding stator blade 21. The second vent pipe 56 is used to discharge the air in the second working chamber 23 and to open the solenoid valve on the first vent pipe 55 to discharge the air in the first working chamber 22. When hydraulic oil is delivered to the first working chamber 22 through the other end of the oil guide pipe 51, the solenoid valve on the other end of the oil guide pipe 51 is opened to push the bottom second rotor blade 41 after rotation, thereby driving the rotor shaft 4 to rotate clockwise. When the rotor shaft 4 rotates clockwise, the second vent pipe 56 is used to discharge the air in the first working chamber 22, and the solenoid valve on the first vent pipe 55 is in the closed state to realize the forward and reverse rotation of the rotor shaft 4.

[0031] It should be noted that the end of the oil supply pipe 52 away from the oil guide pipe 51 is connected to a hydraulic pump, and the inlet end of the hydraulic pump is connected to the hydraulic oil tank. The hydraulic pump pumps hydraulic oil into the oil supply pipe 52, and then delivers it into the oil guide pipe 51 through a three-way valve. The oil is then delivered from one end of the oil guide pipe 51 through the switching of the U-shaped oil guide pipe 51 and the three-way valve. The end of the return pipe 54 away from the oil guide pipe 51 is fixedly connected to the top of the oil tank for returning hydraulic oil.

[0032] Each stator blade 21 has a concave side away from its corresponding rotor blade 41, and the specifications of the concave part of each stator blade 21 are adapted to the specifications of the rotor blade 41. This allows each rotor blade 41 to rotate into the stator blade 21 away from the rotor blade 41 when the rotor shaft 4 is driven to rotate axially. That is, the top rotor blade 41 can rotate into the concave part of the bottom stator blade 21, and the bottom rotor blade 41 can rotate into the concave part of the top stator blade 21, and be accommodated by the stator blade 21. The maximum range of axial rotation of the rotor shaft 4 is 180°.

[0033] In addition, an air vent is provided on the side of the bottom stator blade 21 near the second air vent 56, and a Y-shaped air vent is provided at the end of the stator housing 2 near the second air vent 56. The Y-shaped air vent is connected to the air vent, the second air vent 56 and the first working chamber 22 respectively, so that the second air vent 56 can conduct and discharge the air in the first working chamber 22 and the second working chamber 23 respectively when the rotor shaft 4 rotates.

[0034] In an optional embodiment, the oil guide channel consists of a pair of first oil inlets 57 and a pair of second oil inlets 58. The pair of first oil inlets 57 are opened on the stator housing 2 near the oil guide pipe 51, and the pair of second oil inlets 58 are opened on the rear cover 3 near the oil guide pipe 51. One end of the pair of second oil inlets 58 is connected to the end of the oil guide pipe 51 near the rear cover 3, and the end of the pair of second oil inlets 58 away from the oil guide pipe 51 is connected to the end of the pair of first oil inlets 57 near the oil guide pipe 51.

[0035] In this embodiment, when the oil guide pipe 51 guides the hydraulic oil to the first working chamber 22 and the second working chamber 23, the hydraulic oil can flow smoothly into the cavity of the stator housing 2 through the first oil inlet hole 57 and the second oil inlet hole 58. At the same time, the pair of interconnected first oil inlet holes 57 and second oil inlet holes 58 correspond to the first working chamber 22 and the second working chamber 23, respectively.

[0036] It should be noted that an oil guide port is provided on the side of the top stator blade 21 near the first oil inlet 57. The oil guide port is connected to the first oil inlet 57 near the first working chamber 22 of the pair of first oil inlets 57, so that the first oil inlet 57 near the top stator blade 21 can guide the hydraulic oil into the first working chamber 22 through the oil guide port. Conversely, the first oil inlet 57 away from the top stator blade 21 guides the hydraulic oil into the second working chamber 23.

[0037] In an optional embodiment, the sealing assembly includes a flexible sealing frame 411 fixedly connected to the middle of the outer surface of each rotor blade 41 and to each stator blade 21 near the outer surface of its corresponding rotor blade 41. Each rotor blade 41 has an oil guide hole 412 on the side near its corresponding stator blade 21. The oil guide hole 412 is convex in shape. Each rotor blade 41 has an oil guide cavity 415 in the middle, and the oil guide cavity 415 on each rotor blade 41 is interconnected with the oil guide hole 412. Each rotor blade 41 has a first through hole 413 on the side near the front cover 1 and the rear cover 3. Each rotor blade 41 has a second through hole 416 on the side away from the rotor shaft 4, and the first through hole 413 and the second through hole 416 on each rotor blade 41 are interconnected with the oil guide cavity 415. A spring sheet 414 is fixedly connected between the inner side of each flexible sealing frame 411 and the inner side of its corresponding oil guide cavity 415.

[0038] In this embodiment, a flexible sealing frame 411 is located on the rotor blade 41 and the stator blade 21 to increase the airtightness between the rotor blade 41 and the stator blade 21 and the inner wall of the front cover 1, the rear cover 3, the stator housing 2, and the stator blade 21 and the rotor shaft 4. Since the flexible sealing frame 411 on the rotor blade 41 is elastically supported by the spring plate 414, when the hydraulic oil is delivered to the first working chamber 22 and the second working chamber 23, it can enter the oil guide chamber 415 through the oil guide hole 412, and exert pressure on the flexible sealing frame 411 on the rotor blade 41 through the first through hole 413 and the second through hole 416, pushing the flexible sealing frame 411 on the rotor blade 41 to expand in a direction away from the rotor blade 41, and tightly fit with the inner wall of the front cover 1, the rear cover 3 and the stator housing 2, so as to improve the sealing of the rotor blade 41 during rotation and prevent hydraulic oil from leaking between the various working chambers.

[0039] It should be noted that the oil guide hole 412 on the top rotor blade 41 is connected to the first oil inlet hole 57 on the side away from the top stator blade 21, while the oil guide hole 412 on the bottom rotor blade 41 is located in the first working chamber 22. This allows the first oil inlet hole 57 corresponding to the oil guide hole 412 on the top rotor blade 41 to flow smoothly between the top rotor blade 41 and the top stator blade 21 when hydraulic oil is being transported, thus smoothly pushing the top rotor blade 41 and flowing into the oil guide chamber 415 inside the top rotor blade 41 through the oil guide hole 412 on the top rotor blade 41. The end of the spring plate 414 away from the rotor shaft 4 extends through the first through hole 413 and the second through hole 416 respectively, and is fixed to the inner wall of the flexible sealing frame 411 on the rotor blade 41.

[0040] Example 2: The oil injection component 5 also includes a diversion pipe 53, which is fixedly connected to a section of the oil supply pipe 52 away from the oil guide pipe 51 via a three-way valve.

[0041] In this embodiment, the end of the diverter pipe 53 away from the oil supply pipe 52 can be connected to the oil supply pipe 52 of other hydraulic motors, so that one hydraulic pump can drive different hydraulic motors, or adjust the hydraulic pump's delivery volume and rate of hydraulic oil, so that one hydraulic pump can control different numbers of hydraulic motors at the same time, thereby reducing the space occupied by the entire equipment.

[0042] The working principle in the above embodiments is as follows: Initial state and oil circuit preparation: The oil supply pipe 52 is connected to an external hydraulic pump to pump hydraulic oil from the oil tank. The hydraulic oil enters the U-shaped oil guide pipe 51 through the three-way valve. The two ends of the oil guide pipe 51 are connected to the first oil inlet 57 on the stator housing 2 through the second oil inlet hole 58 on the rear cover 3, respectively, corresponding to the first working chamber 22 and the second working chamber 23. The solenoid valves of all pipelines are initially in the closed state. Rotor shaft 4 rotates counterclockwise from 0° to 180°: Open the solenoid valve at one end of the oil guide pipe 51 corresponding to the second working chamber 23; Hydraulic oil flows sequentially along the oil guide pipe 51 into the corresponding second oil inlet 58 and first oil inlet 57, and enters the second working chamber 23. The hydraulic pressure acts on the top rotor blade 41, pushing it to rotate away from the corresponding stator blade 21. At the same time, the bottom rotor blade 41 is also driven to rotate away from its corresponding stator blade 21, driving the rotor shaft 4 to rotate counterclockwise. During this process, the solenoid valve on the second vent pipe 56 is opened to discharge the air in the second working chamber 23 through its Y-shaped vent hole and the vent port of the bottom stator blade 21; at the same time, the solenoid valve on the first vent pipe 55 is opened to discharge the air in the first working chamber 22 to eliminate back pressure. When the top rotor blade 41 rotates until it is fully accommodated in the concave part of the bottom stator blade 21, the rotor shaft 4 reaches a maximum rotation angle of 180°. Rotor shaft 4 rotates 180° clockwise to 0°: Switch the three-way valve and open the solenoid valve at the other end of the oil guide pipe 51 corresponding to the first working chamber 22, and close the solenoid valve on the first vent pipe 55. Hydraulic oil enters the first working chamber 22 through the first oil inlet 57 and the second oil inlet 58 on the other side. At this time, the oil guide port on the top stator blade 21 guides the oil into the first working chamber 22. The hydraulic pressure drives the bottom rotor blades 41 to rotate in the opposite direction, thereby driving the rotor shaft 4 to rotate clockwise and return from 180° to 0°. During this process, the solenoid valve on the second vent pipe 56 opens again to discharge the air in the first working chamber 22, ensuring smooth rotation. Thus, by controlling the flow of hydraulic oil, rotor shaft 4 can oscillate back and forth between 0° and 180°; To improve sealing during rotation, flexible sealing frames 411 are provided on both rotor blades 41 and stator blades 21. When hydraulic oil enters the working chamber, a portion of the hydraulic oil will flow into the internal oil guide chamber 415 through the oil guide hole 412 on the rotor blade 41. The oil pressure then acts on the inner side of the flexible sealing frame 411 through the first through hole 413 and the second through hole 416. Under the combined action of the oil pressure and the spring plate 414, the flexible sealing frame 411 expands outward and fits more tightly against the inner walls of the front cover 1, the rear cover 3 and the stator housing 2, effectively preventing hydraulic oil from leaking between the first working chamber 22 and the second working chamber 23. After completing its work, the hydraulic oil flows back to the oil tank through the corresponding return pipe 54 of the solenoid valve. Sealed bearings are used at the connection between rotor shaft 4 and rear cover 3 and front cover 1 to prevent axial leakage; sealing rings on both sides of stator housing 2 are embedded in sealing grooves 24 of front cover 1 and rear cover 3 to ensure static sealing between housings. The core components, stator housing 2, stator blades 21, rotor shaft 4, and rotor blades 41, are all made of composite materials of ultra-high molecular weight polyethylene and carbon fiber, which ensures strength and reduces weight; the hollow shaft section design of rotor shaft 4 on one side of the rear cover further optimizes the overall quality. When multiple motors need to work together, the shunt pipe 53 on the oil supply pipe 52 can be connected to the oil supply pipes of other motors through a three-way valve, so as to realize the single pump driving multiple actuators.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 180° rotating hydraulic drive motor, characterized in that, include: A front cover (1), a rear cover (3) and a stator housing (2) installed between the front cover (1) and the rear cover (3), wherein a rotor shaft (4) is rotatably mounted on the front cover (1) and the rear cover (3) respectively penetrating the front cover (1), the rear cover (3) and the stator housing (2); A pair of symmetrically distributed stator blades (21) are fixedly connected to the inner wall of the stator housing (2); The rotor shaft (4) is fixedly connected to a pair of symmetrically distributed rotor blades (41) at one end inside the stator housing (2), and each rotor blade (41) and its corresponding stator blade (21) are in contact with each other. The contacting stator blade (21) and rotor blade (41) divide the cavity of the stator housing (2) into a first working cavity (22) and a second working cavity (23). The rear cover (3) and the stator housing (2) are provided with oil injection components (5) for conveying hydraulic oil; The oil injection component (5) includes an oil guide pipe (51) fixedly connected to the rear cover (3). The oil guide pipe (51) is U-shaped. One end of the oil guide pipe (51) away from the rear cover (3) is fixedly connected to an oil supply pipe (52) through a three-way valve. A pair of return pipes (54) are fixedly connected to the middle of the oil guide pipe (51). A first vent pipe (55) is fixedly connected to the return pipe (54) near the first working chamber (22) of the pair of return pipes (54). A second vent pipe (56) is fixedly connected to the bottom end of the stator housing (2), and the second vent pipe (56) is connected to the second working chamber (23) on the stator housing (2). Solenoid valves are installed on one end of the oil guide pipe (51) connected to the rear cover (3), one end of the return pipe (54) connected to the oil guide pipe (51), the connection end of the first vent pipe (55) and its corresponding return pipe (54), and the second vent pipe (56). The stator housing (2) and the rear cover (3) are provided with oil guide channels that are respectively connected to the oil guide pipe (51), the top rotor blade (41), and the top stator blade (21); The rotor blades (41) and stator blades (21) are provided with sealing components.

2. The 180° rotary hydraulic drive motor according to claim 1, characterized in that, Each stator blade (21) is concave on the side away from its corresponding rotor blade (41), and the specifications of the concave part of each stator blade (21) are adapted to the specifications of the rotor blade (41).

3. The 180° rotary hydraulic drive motor according to claim 1, characterized in that, The oil guide channel consists of a pair of first oil inlets (57) and a pair of second oil inlets (58). The pair of first oil inlets (57) are opened on one end of the stator housing (2) near the oil guide pipe (51), and the pair of second oil inlets (58) are opened on one end of the rear cover (3) near the oil guide pipe (51). One end of the pair of second oil inlets (58) is connected to the end of the oil guide pipe (51) near the rear cover (3), and the end of the pair of second oil inlets (58) away from the oil guide pipe (51) is connected to the end of the pair of first oil inlets (57) near the oil guide pipe (51).

4. A 180° rotating hydraulic drive motor according to claim 3, characterized in that, The top stator blade (21) has an oil guide port on the side near the first oil inlet (57), and the oil guide port is connected to the first oil inlet (57) near the first working chamber (22) of a pair of first oil inlets (57).

5. A 180° rotary hydraulic drive motor according to claim 1, characterized in that, The stator blade (21) at the bottom has an air vent on the side near the second air vent (56), and the stator housing (2) has a Y-shaped air hole at the end near the second air vent (56). The Y-shaped air hole is connected to the air vent, the second air vent (56) and the first working chamber (22) respectively.

6. A 180° rotary hydraulic drive motor according to claim 1, characterized in that, The sealing assembly includes a flexible sealing frame (411) fixedly connected to the middle of the outer surface of each rotor blade (41) and to the outer surface of each stator blade (21) near its corresponding rotor blade (41). Each rotor blade (41) has an oil guide hole (412) on the side near its corresponding stator blade (21). The oil guide hole (412) is convex in shape. Each rotor blade (41) has an oil guide cavity (415) in the middle. The oil guide cavity (415) on each rotor blade (41) is connected to the oil guide hole (412). 12) They are interconnected. Each rotor blade (41) has a first through hole (413) on the side near the front cover (1) and the rear cover (3). Each rotor blade (41) has a second through hole (416) on the side away from the rotor shaft (4). The first through hole (413) and the second through hole (416) on each rotor blade (41) are connected to the oil guide cavity (415). A spring sheet (414) is fixedly connected between the inner side of each flexible sealing frame (411) and the inner side of its corresponding oil guide cavity (415).

7. A 180° rotary hydraulic drive motor according to claim 6, characterized in that, The oil guide hole (412) on the top rotor blade (41) is connected to the first oil inlet hole (57) on the side away from the top stator blade (21), while the oil guide hole (412) on the bottom rotor blade (41) is located in the first working chamber (22).

8. A 180° rotary hydraulic drive motor according to claim 1, characterized in that, The front cover (1), stator housing (2) and rear cover (3) are each provided with a number of mounting holes (6) that are distributed in an annular pattern at equal intervals. The stator housing (2), stator blades (21), rotor shaft (4) and rotor blades (41) are all made of ultra-high molecular weight polyethylene and carbon fiber composite molding material. The ultra-high molecular weight polyethylene accounts for 88% to 90% and the carbon fiber accounts for 10% to 12% by weight percentage.

9. A 180° rotary hydraulic drive motor according to claim 1, characterized in that, The oil injection component (5) also includes a diverter pipe (53), which is fixedly connected to a section of the oil supply pipe (52) away from the oil guide pipe (51) via a three-way valve.

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