A dual speed hydraulic motor

Abstract

The utility model relates to the field of hydraulic motor, and specifically relates to a double-speed hydraulic motor, including the shell body, the one side of shell body is installed with stator, and the piston is installed in stator, the end part transmission connection rotor of piston, rotor and spline shaft transmission connection, the oil distribution disc is movably installed in stator, the oil injection hole is set up on the oil distribution disc, and the oil injection hole on the oil distribution disc and the oil inlet of piston are communicated, the utility model discloses a control hydraulic valve core, and the oil supply 1MPa pressure is supplied to valve core, and under the action of pressure, the valve core is pushed and moves forward, changes the number of oil distribution disc hole, realizes the motor under the condition of same flow, realizes the motor according to 1:2 or other proportion speed operation, reaches the ideal condition, and the oil supply pressure of valve core is disconnected, and under the action of spring, the valve core restores the original state, and the motor operates according to 1:1 speed, thereby changing the rotating speed or the torsional force under the condition that the hydraulic station output power is unchangeable.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic motors, specifically a dual-speed hydraulic motor. Background Technology

[0002] A hydraulic motor is an actuator that converts hydraulic energy (pressure and flow of high-pressure oil) into mechanical energy (rotational motion). Simply put, it is the "engine" in a hydraulic system, functioning similarly to an electric motor or internal combustion engine, but its power source is hydraulic oil.

[0003] Traditional hydraulic motors often adjust the speed and torque of the motor output shaft by controlling the output power of the hydraulic station. However, when the rated power of the hydraulic station is low or reaches its peak power, it is impossible to change the speed and torque of the motor output shaft. Utility Model Content

[0004] To address the shortcomings of existing technologies, such as the inability to change the speed and torque of the motor output shaft when the rated power of the hydraulic station is low or reaches its peak power, this invention proposes a dual-speed hydraulic motor.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a dual-speed hydraulic motor, including a housing body, a stator installed on one side of the housing body, and a piston installed inside the stator. The end of the piston is driven to connect to a rotor, and the inner side of the rotor is driven to connect to a spline shaft. An oil distribution plate is movably installed inside the stator. The oil distribution plate is provided with an oil injection hole, and the oil injection hole on the oil distribution plate is connected to the oil inlet of the piston. An oil distribution plate seat is provided inside the oil distribution plate. A speed regulating oil port is opened at the end of the stator, and a valve stem is installed inside the speed regulating oil port. The end of the valve stem is fixedly connected to the oil distribution plate, and a valve stem spring is sleeved on the outside of the valve stem. The two ends of the valve stem spring are fixedly connected to the end of the valve stem and the inner wall of the speed regulating oil port, respectively.

[0006] Preferably, the housing body is internally fitted with a tapered roller bearing 1 and a tapered roller bearing 2, and the spline shaft is connected to the inner rings of the tapered roller bearing 1 and the tapered roller bearing 2 by a transition fit.

[0007] Preferably, an oil seal is installed at the end of the outer casing, and an O-ring is also installed on the inner wall of the outer casing. The outer casing seals the gap between itself and the tapered roller bearing through the oil seal and the O-ring.

[0008] Preferably, a valve core cover is installed at the end of the distribution plate seat, and a shaft spring retainer is placed between the valve core cover and the end of the distribution plate seat. The valve core cover is detachably installed at the end of the distribution plate seat by screws.

[0009] Preferably, the end of the oil distribution plate seat is provided with a screw two, and the end of the oil distribution plate seat is detachably installed with a cover plate by bolts. An O-ring two is provided between the oil distribution plate seat and the cover plate, and the oil distribution plate seat and the cover plate are sealed by the O-ring two.

[0010] Preferably, a spring is installed inside the stator, and the end of the spring is connected to the oil distribution plate seat.

[0011] Preferably, four sets of Grate rings are installed between the stator and the oil distribution plate seat, and the Grate rings are arranged in a stepped manner between the stator and the oil distribution plate seat.

[0012] Preferably, a stator tensioning pin is slidably inserted into the stator, and a hexagonal flange locking nut is provided on the outer side of the housing body. The hexagonal flange locking nut and the stator tensioning pin are threadedly connected, and the stator and the housing body are tightened and sealed by the stator tensioning pin and the hexagonal flange locking nut.

[0013] The advantages of this utility model are:

[0014] This utility model's hydraulic station, under the same flow rate, controls the hydraulic valve core by supplying oil at a pressure of 1 MPa. Under this pressure, the valve core moves forward, changing the actual number of oil injection holes in the distributor plate. This controls the actual number of pistons engaged. When the number of pistons engaged is halved, the flow rate of hydraulic oil inside the piston doubles, thus doubling the speed of the spline shaft. This sacrifices output torque but increases peak speed. When greater torque is needed, the oil injection holes in the distributor plate are fully opened, engaging all pistons. This sacrifices speed to increase torque, achieving the desired control. When the oil supply pressure to the valve core is disconnected, the valve core returns to its original position under the action of the valve stem spring. This achieves the effect of controlling the speed and torque of the motor output shaft under the same flow rate, solving the problem that when the rated power of the hydraulic system is low or reaches its peak power, it is impossible to change the speed and torque of the motor output shaft. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a schematic diagram of the structure of the outer shell of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the oil distribution plate seat of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the hexagonal flange locking nut of this utility model.

[0020] In the diagram: 1. Splined shaft; 2. Oil seal; 3. O-ring 1; 4. Tapered roller bearing 1; 5. Housing body; 6. Tapered roller bearing 2; 7. Rotor; 8. Piston; 11. Stator; 13. Oil distributor plate seat; 14. Oil distributor plate; 15. Valve stem; 16. Valve stem spring; 17. Speed ​​regulating oil port; 18. Shaft spring retainer ring; 19. Valve core cover plate; 20. Screw 1; 22. Cover plate; 23. Spring; 24. O-ring 2; 25. Screw 2; 26. Grylls ring; 35. Stator tension pin; 37. Hexagonal flange lock nut. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses a dual-speed hydraulic motor. (Refer to...) Figure 1 and Figure 2 A dual-speed hydraulic motor includes a housing body 5, a stator 11 mounted on one side of the housing body 5, and a piston 8 installed inside the stator 11. The end of the piston 8 is drivenly connected to a rotor 7, and the inner side of the rotor 7 is drivenly connected to a splined shaft 1. Figure 2 and Figure 3 (Two different splines are used in the middle). An oil distribution plate 14 is movably installed inside the stator 11. An oil injection hole is provided on the oil distribution plate 14, and the oil injection hole on the oil distribution plate 14 is connected to the oil inlet of the piston 8. An oil distribution plate seat 13 is provided on the inner side of the oil distribution plate 14. A speed regulating oil port 17 is opened at the end of the stator 11. A valve stem 15 is installed inside the speed regulating oil port 17. The end of the valve stem 15 is fixedly connected to the oil distribution plate 14. A valve stem spring 16 is sleeved on the outside of the valve stem 15. The two ends of the valve stem spring 16 are fixedly connected to the end of the valve stem 15 and the inner wall of the speed regulating oil port 17, respectively.

[0024] Reference Figure 1 and Figure 2The inner casing 5 is fitted with tapered roller bearing 4 and tapered roller bearing 6. The inner rings of the spline shaft 1 and tapered roller bearing 4 and tapered roller bearing 6 are connected by an transition fit. The spline shaft 1 can rotate smoothly through tapered roller bearing 4 and tapered roller bearing 6.

[0025] Reference Figure 1 and Figure 2 An oil seal 2 is installed at the end of the outer shell body 5, and an O-ring 3 is also installed on the inner wall of the outer shell body 5. The outer shell body 5 seals the gap with the tapered roller bearing 4 through the oil seal 2 and the O-ring 3. The sealing effect between the outer shell body 5 and the tapered roller bearing 4 is improved through the oil seal 2 and the O-ring 3.

[0026] Reference Figure 1 and Figure 2 A valve core cover plate 19 is installed at the end of the distributor plate seat 13. A shaft spring retainer 18 is placed between the valve core cover plate 19 and the end of the distributor plate seat 13. The valve core cover plate 19 is detachably installed at the end of the distributor plate seat 13 by screw 20. The valve core cover plate 19 can be disassembled for maintenance.

[0027] Reference Figure 1 and Figure 2 The end of the oil distribution plate seat 13 is provided with screw 25, and the end of the oil distribution plate seat 13 is detachably installed with cover plate 22 by bolts. O-ring 24 is provided between the oil distribution plate seat 13 and cover plate 22, and the oil distribution plate seat 13 and cover plate 22 are sealed by O-ring 24.

[0028] Reference Figure 1 and Figure 2 A spring 23 is installed inside the stator 11. The end of the spring 23 is connected to the oil distribution plate seat 13. The oil distribution plate seat 13 and the stator 11 can be easily separated by the spring 23.

[0029] Reference Figure 1 and Figure 2 Four sets of Gryphon rings 26 are installed between the stator 11 and the oil distribution plate seat 13. The Gryphon rings 26 are arranged in a stepped manner between the stator 11 and the oil distribution plate seat 13. The stator 11 and the oil distribution plate seat 13 are sealed by setting the Gryphon rings 26.

[0030] Reference Figure 3 and Figure 4 A stator tensioning pin 35 is slidably inserted into the stator 11, and a hexagonal flange locking nut 37 is provided on the outer side of the outer casing 5. The hexagonal flange locking nut 37 and the stator tensioning pin 35 are threadedly connected. The stator 11 and the outer casing 5 are tightened and sealed by the stator tensioning pin 35 and the hexagonal flange locking nut 37. The stator tensioning pin 35 can seal the stator 11 and the outer casing 5.

[0031] Working principle: In practical use, oil can be injected into the speed regulating port 17, thereby pushing the distribution plate 14 to move and changing the actual number of oil injection holes actually in use on the distribution plate 14. The valve core is supplied with oil at a pressure of 1MPa. Under the action of pressure, the valve core is pushed forward. When the number of pistons 8 in operation is halved, the flow rate of hydraulic oil inside the piston 8 doubles. At this time, the speed of the spline shaft 1 can be doubled. The output torque is sacrificed, but the peak speed is increased. When a larger torque is required, the oil injection holes of the distribution plate 14 are fully opened, and all pistons 8 are put into use. In this way, the speed is sacrificed to increase the torque and the control reaches the ideal state. When the oil supply pressure to the valve core is disconnected, the valve core returns to its original state under the action of the valve stem spring 16.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A dual-speed hydraulic motor, comprising a housing body (5), characterized in that: A stator (11) is mounted on one side of the outer casing (5), and a piston (8) is installed inside the stator (11). The end of the piston (8) is connected to a rotor (7), and a splined shaft (1) is connected to the inner side of the rotor (7). An oil distribution plate (14) is movably mounted inside the stator (11). An oil injection hole is provided on the oil distribution plate (14), and the oil injection hole on the oil distribution plate (14) is connected to the oil inlet of the piston (8). (14) has an oil distribution plate seat (13) on its inner side. The stator (11) has a speed regulating oil port (17) at its end. A valve stem (15) is installed inside the speed regulating oil port (17). The end of the valve stem (15) is fixedly connected to the oil distribution plate (14). A valve stem spring (16) is sleeved on the outside of the valve stem (15). The two ends of the valve stem spring (16) are fixedly connected to the end of the valve stem (15) and the inner wall of the speed regulating oil port (17), respectively.

2. The dual-speed hydraulic motor according to claim 1, characterized in that: The inner casing (5) is fitted with tapered roller bearing 1 (4) and tapered roller bearing 2 (6), and the spline shaft (1) is connected to the inner rings of tapered roller bearing 1 (4) and tapered roller bearing 2 (6) by a transition fit.

3. A dual-speed hydraulic motor according to claim 2, characterized in that: An oil seal (2) is installed at the end of the outer shell body (5), and an O-ring (3) is also installed on the inner wall of the outer shell body (5). The outer shell body (5) seals the gap with the tapered roller bearing (4) through the oil seal (2) and the O-ring (3).

4. A dual-speed hydraulic motor according to claim 1, characterized in that: A valve core cover plate (19) is installed at the end of the oil distribution plate seat (13). A shaft spring retainer (18) is placed between the valve core cover plate (19) and the end of the oil distribution plate seat (13). The valve core cover plate (19) is detachably installed at the end of the oil distribution plate seat (13) by screw (20).

5. A dual-speed hydraulic motor according to claim 1, characterized in that: The end of the oil distribution plate seat (13) is provided with screw two (25), and the end of the oil distribution plate seat (13) is detachably installed with cover plate (22) by bolts. O-ring two (24) is provided between the oil distribution plate seat (13) and the cover plate (22), and the oil distribution plate seat (13) and the cover plate (22) are sealed by O-ring two (24).

6. A dual-speed hydraulic motor according to claim 1, characterized in that: A spring (23) is installed inside the stator (11), and the end of the spring (23) is connected to the oil distribution plate seat (13).

7. A dual-speed hydraulic motor according to claim 1, characterized in that: Four sets of Gryphon rings (26) are installed between the stator (11) and the oil distribution plate seat (13), and the Gryphon rings (26) are arranged in a stepped manner between the stator (11) and the oil distribution plate seat (13).

8. A dual-speed hydraulic motor according to claim 1, characterized in that: A stator tension pin (35) is slidably inserted into the stator (11), and a hexagonal flange locking nut (37) is provided on the outer side of the outer shell body (5). The hexagonal flange locking nut (37) and the stator tension pin (35) are threadedly connected, and the stator (11) and the outer shell body (5) are tightened and sealed by the stator tension pin (35) and the hexagonal flange locking nut (37).

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