Rear oil inlet DR series cycloid hydraulic motor

Abstract

The utility model discloses a rear oil inlet DR series cycloid hydraulic motor which comprises a shell and a rear shell, the rear shell is connected with the shell, an output shaft is rotatably arranged in the middle of the shell, a stator and rotor pair is arranged at the joint of the shell and the rear shell, a linkage shaft is arranged at the center in the shell, and a motor is arranged in the linkage shaft. Two sealing oil cavities are formed through the commutator partition plate and the piston, high-pressure oil is distributed through the commutator, the high-pressure oil is continuously led into the oil distribution disc, and the high-pressure oil is continuously led into the oil distribution disc, so that the high-pressure oil is evenly distributed in the oil distribution disc. The rotor in the stator and rotor pair is pushed to rotate, the linkage shaft is driven at the same time, the output rotating speed and torque are output outwards through the output shaft, the output shaft is supported through the high-pressure seal and the heavy-duty bearing, meanwhile, a hole is drilled in the middle of the linkage shaft, the linkage shaft is cooled and lubricated through hydraulic oil in the shell, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic motors, in particular to a DR series cycloid hydraulic motor with a rear oil inlet. Background Art

[0002] Due to its case drain design, the DR600 series motor is an excellent medium-sized motor for applications with high duty cycles or frequent reversing. The case drain structure provides many advantages, including reduced pressure at the shaft seal and providing a cooling circuit for the system. Case flow also lubricates critical drive components, extending motor life. An internal drain option is also available. Stacked manifolds and three-stage valve plates are used to produce higher overall efficiency and more useful power. Steel face seals in the rotary valve also reduce the risk of seal extrusion and melting, which is possible in competitor products. For this reason, a rear-inlet DR series gerotor hydraulic motor is proposed. Utility Model Content

[0003] The utility model provides a DR series cycloid hydraulic motor with a rear oil inlet.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a rear oil inlet DR series cycloid hydraulic motor, comprising a housing and a rear housing, the rear housing and the housing being connected, an output shaft being rotatably provided in the middle of the housing, a stator and rotor pair being provided at the connection between the housing and the rear housing, a linkage shaft being provided at the center of the housing, one end of the linkage shaft being rotatably provided in the rear housing, a piston being connected to one end of the linkage shaft close to the rear housing, and the piston being provided in the rear housing.

[0005] Preferably, a wear-resistant disk is provided at the connection between the stator-rotor pair and the housing, and the wear-resistant disk is provided between the stator-rotor pair and the housing.

[0006] Preferably, a needle roller bearing is sleeved on the output shaft, and the needle roller bearing is arranged in the housing.

[0007] Preferably, the end of the linkage shaft away from the piston is arranged in the output shaft.

[0008] Preferably, an oil distribution plate is provided between the rear housing and the stator and rotor pair, the oil distribution plate is sleeved on the outside of the linkage shaft, the oil distribution plate is fixed on the side of the stator and rotor pair, and a commutator partition is provided between the oil distribution plate and the rear housing, the commutator partition is provided on the side of the rear housing and sleeved on the outside of the linkage shaft.

[0009] The beneficial effects of the utility model are:

[0010] The utility model generates two sealed oil chambers through the commutator partition and the piston. The high-pressure oil distributes the hydraulic oil through the commutator, accurately meters the oil, and produces excellent volumetric efficiency, so that the high-pressure oil continuously flows into the oil distribution plate, and then enters the stator and rotor pair, promotes the rotor in the stator and rotor pair to rotate, and at the same time drives the linkage shaft to rotate together, and outputs the output speed and torque to the outside through the output shaft. The shell is made of high-strength QT material, which allows the motor's load capacity to match the application conditions. The output shaft is supported by high-pressure seals and heavy-duty bearings. At the same time, a hole is punched in the middle of the linkage shaft, so that the hydraulic oil inside the shell can cool and lubricate the linkage shaft, thereby increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the DR series cycloid hydraulic motor with rear oil inlet of the utility model.

[0012] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0013] In the figure: 1. Housing; 2. Rear housing; 3. Output shaft; 4. Stator and rotor pair; 5. Linkage shaft; 6. Piston; 7. Wear-resistant disk; 8. Needle roller bearing; 9. Oil distribution plate; 10. Commutator partition. DETAILED DESCRIPTION

[0014] The following is combined with Figure 1-2 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0016] This embodiment provides a rear oil inlet DR series cycloid hydraulic motor, including a housing 1 and a rear housing 2, the rear housing 2 and the housing 1 are connected, an output shaft 3 is rotatably provided in the middle of the housing 1, a stator and rotor pair 4 is provided at the connection between the housing 1 and the rear housing 2, a linkage shaft 5 is provided at the center of the housing 1, one end of the linkage shaft 5 is rotatably provided in the rear housing 2, a piston 6 is connected to the end of the linkage shaft 5 close to the rear housing 2, and the piston 6 is provided in the rear housing 2, a wear-resistant disk 7 is provided at the connection between the stator and rotor pair 4 and the housing 1, A wear-resistant disc 7 is provided between the stator and rotor pair 4 and the housing 1. A needle roller bearing 8 is sleeved on the output shaft 3. The needle roller bearing 8 is provided in the housing 1. The end of the linkage shaft 5 away from the piston 6 is provided in the output shaft 3. An oil distribution plate 9 is provided between the rear housing 2 and the stator and rotor pair 4. The oil distribution plate 9 is sleeved on the outside of the linkage shaft 5. The oil distribution plate 9 is fixed on the side of the stator and rotor pair 4. A commutator partition 10 is provided between the oil distribution plate 9 and the rear housing 2. The commutator partition 10 is provided on the side of the rear housing 2 and sleeved on the outside of the linkage shaft 5.

[0017] The working process of the rear oil inlet DR series cycloid hydraulic motor in this embodiment is as follows: the DR600 series motor has oil inlet and outlet ports through the rear housing 2, and two sealed oil chambers are generated by the commutator partition 10 and the piston 6. The high-pressure oil is distributed to the hydraulic oil through the commutator, so that the high-pressure oil continuously flows into the oil distribution plate 9, and then enters the stator and rotor pair 4, pushing the rotor in the stator and rotor pair 4 to rotate, while driving the linkage shaft to rotate together, and outputting the output speed and torque to the outside through the output shaft 3. The housing 1 is made of high-strength QT material and supports the output shaft 3 through high-pressure seals and heavy-duty bearings. At the same time, a hole is punched in the middle of the linkage shaft 5 so that the hydraulic oil inside the housing 1 can cool and lubricate the linkage shaft 5, thereby improving its service life.

[0018] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A DR series cycloid hydraulic motor with rear oil inlet, characterized in that: The invention comprises a housing (1) and a rear housing (2), wherein the rear housing (2) and the housing (1) are connected to each other, an output shaft (3) is rotatably provided in the middle of the housing (1), a stator-rotor pair (4) is provided at the connection between the housing (1) and the rear housing (2), a linkage shaft (5) is provided at the center of the housing (1), one end of the linkage shaft (5) is rotatably provided in the rear housing (2), and a piston (6) is connected to the end of the linkage shaft (5) close to the rear housing (2), and the piston (6) is provided in the rear housing (2).

2. The rear oil inlet DR series cycloid hydraulic motor according to claim 1 is characterized in that: A wear-resistant disc (7) is provided at the connection between the stator-rotor pair (4) and the housing (1), and the wear-resistant disc (7) is provided between the stator-rotor pair (4) and the housing (1).

3. The rear oil inlet DR series cycloid hydraulic motor according to claim 1, characterized in that: A needle roller bearing (8) is sleeved on the output shaft (3), and the needle roller bearing (8) is arranged in the housing (1).

4. The rear oil inlet DR series cycloid hydraulic motor according to claim 1, characterized in that: One end of the linkage shaft (5) away from the piston (6) is arranged inside the output shaft (3).

5. The rear oil inlet DR series cycloid hydraulic motor according to claim 1, characterized in that: An oil distribution plate (9) is provided between the rear housing (2) and the stator-rotor pair (4), the oil distribution plate (9) being sleeved on the outside of the linkage shaft (5), the oil distribution plate (9) being fixedly provided on the side of the stator-rotor pair (4), and a commutator partition (10) being provided between the oil distribution plate (9) and the rear housing (2), the commutator partition (10) being provided on the side of the rear housing (2) and sleeved on the outside of the linkage shaft (5).

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