Wear-resistant cycloid hydraulic motor

Abstract

The utility model relates to the technical field of cycloid hydraulic motors, and discloses a wear-resistant cycloid hydraulic motor which comprises a cycloid hydraulic motor body, an inner gear ring is fixedly connected to the interior of the cycloid hydraulic motor body, and an arc surface is arranged on the inner wall of the inner gear ring in a surrounding mode. A rotor is rotationally connected to the interior, located on the inner side of the inner gear ring, of the cycloid hydraulic motor body, a plurality of oil conveying holes are formed in the interior of the rotor in a surrounding mode, a plurality of grooves are formed in the interior of the rotor in a surrounding mode, and the oil conveying holes extend into the grooves correspondingly. The piston block slides along the arc line of the inner wall of the inner gear ring through the first balls after being ejected out, the rotor can be pushed to rotate so that the rotor can be normally used, the cast iron abrasion-resistant strips have the high abrasion-resistant effect, abrasion of the inner gear ring can be reduced when the first balls roll along the surfaces of the cast iron abrasion-resistant strips, and the service life of the rotor is prolonged. And the service life and the use effect of the inner gear ring are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cycloid hydraulic motors, in particular to a wear-resistant cycloid hydraulic motor. Background Art

[0002] The cycloid hydraulic motor is a motor in which the inner gear ring is fixedly connected to the housing. The oil entering from the oil port pushes the piston block arranged around the inside of the rotor to expand and contract. The piston block can slide along the arc inside the outer inner gear ring to drive the rotor to revolve around a center point. The slowly rotating rotor is driven to output through the spline shaft. The cycloid hydraulic motor has a wide speed range and a small rotational inertia. It is easy to start under load and can be used in both forward and reverse directions, and there is no need to stop when changing direction.

[0003] In the prior art, the piston inside the rotor that continuously retracts and contracts will continue to wear as it slides along the arc inside the outer gear ring, which will not only affect the service life of the gerotor hydraulic motor, but also the metal debris generated by long-term wear will extend into the gap inside the motor, affecting the normal use of the gerotor hydraulic motor. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that the piston inside the rotor that continuously retracts and contracts will continue to wear when sliding along the arc inside the outer gear ring, which will not only affect the service life of the cycloid hydraulic motor, but also the metal debris generated by long-term wear will extend into the gap inside the motor, which will affect the normal use of the cycloid hydraulic motor. A wear-resistant cycloid hydraulic motor is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wear-resistant cycloidal hydraulic motor comprises a cycloidal hydraulic motor body, wherein an inner gear ring is fixedly connected to the inside of the cycloidal hydraulic motor body, an inner wall of the inner gear ring is surrounded by an arc surface, the cycloidal hydraulic motor body is located inside the inner side of the inner gear ring and is rotatably connected to a rotor, a plurality of oil delivery holes are opened around the inside of the rotor, a plurality of grooves are opened around the inside of the rotor, and the plurality of oil delivery holes extend to the interiors of the plurality of grooves respectively, a piston is slidably provided on the inner wall of the rotor located in the groove, a first ball is rolled on the inner wall of the piston relative to one side of the inner gear ring, a cast iron wear-resistant strip is fixedly connected to the inner wall of the inner gear ring, and the first ball is rollingly arranged on the side wall of the cast iron wear-resistant strip.

[0007] Preferably, a sealing ring is fixedly connected to the inner wall of the piston, the inner wall of the sealing ring is pressed against the side wall of the first ball, and a sealing pad is fixedly connected to one end of the piston located inside the groove, the side wall of the sealing pad is fitted against the inner wall of the rotor located in the groove.

[0008] Preferably, a guide groove is provided on the inner wall of the groove where the rotor is located, a guide block is slidably provided on the inner wall of the guide groove where the rotor is located, and a side wall of the guide block is fixedly connected to a side wall of the piston.

[0009] Preferably, a second ball is provided inside the guide block for rolling operation, and the second ball is arranged on the inner wall of the rotor located in the guide groove for rolling operation.

[0010] Preferably, a rubber block is fixedly connected to the side wall of the sealing pad, and the rubber block is slidably arranged on the inner wall of the rotor located in the guide groove.

[0011] Preferably, a reinforcing frame is fixedly connected to the inner wall of the top end of the rubber block, the top end of the reinforcing frame is fixedly connected to the bottom of the guide block, the bottom of the reinforcing frame is fixedly connected to a plurality of anti-deformation sheets, and the plurality of anti-deformation sheets extend respectively to the interior of the rubber block.

[0012] Compared with the prior art, the utility model provides a wear-resistant cycloid hydraulic motor, which has the following beneficial effects:

[0013] 1. The wear-resistant cycloidal hydraulic motor can push the rotor to rotate and use the rotor normally by sliding the first ball along the arc of the inner wall of the inner gear ring after the piston block is ejected. The cast iron wear-resistant strip has a strong wear-resistant effect. When the first ball rolls along the surface of the cast iron wear-resistant strip, the wear of the inner gear ring can be reduced, thereby ensuring the service life and use effect of the inner gear ring.

[0014] 2. The wear-resistant cycloidal hydraulic motor uses a sealing ring to prevent metal debris from entering the gap between the piston and the first ball, thereby preventing the first ball from getting stuck in the column and causing accelerated wear. The sealing pad can ensure the sealing of the oil inside the groove, preventing the hydraulic oil from leaking or contacting with metal debris, which would affect its use.

[0015] 3. The wear-resistant cycloidal hydraulic motor can improve the stability of rotor movement by sliding the guide block along the inside of the guide groove. The second ball can reduce the wear of the guide block inside the guide groove. The rubber block slides along the inner wall of the guide groove, which can further improve the sealing of the oil inside the groove. At the same time, the reinforcement frame and the anti-deformation sheet can stably support the rubber block to prevent the rubber block from deforming when sliding and affecting the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a wear-resistant cycloid hydraulic motor proposed by the utility model;

[0017] Figure 2 A structural cross-sectional view of a wear-resistant cycloid hydraulic motor proposed in the utility model

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the local A part;

[0019] Figure 4 for Figure 3 Structural stereogram of the middle sealing pad.

[0020] In the figure: 1 cycloid hydraulic motor, 2 inner gear ring, 3 rotor, 4 oil delivery hole, 5 groove, 6 piston, 7 first ball, 8 cast iron wear strip, 9 sealing ring, 10 sealing pad, 11 guide block, 12 second ball, 13 rubber block, 14 reinforcement frame, 15 anti-deformation sheet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 , a wear-resistant cycloidal hydraulic motor comprises a cycloidal hydraulic motor body 1, an inner gear ring 2 is fixedly connected to the inside of the cycloidal hydraulic motor body 1, an inner wall of the inner gear ring 2 is surrounded by an cambered surface, the cycloidal hydraulic motor body 1 is located inside the inner side of the inner gear ring 2 and is rotatably connected to a rotor 3, a plurality of oil delivery holes 4 are opened around the inside of the rotor 3, a plurality of grooves 5 are opened around the inside of the rotor 3, and the plurality of oil delivery holes 4 extend to the interior of the plurality of grooves 5 respectively, a piston 6 is slidably provided on the inner wall of the rotor 3 located at the groove 5, a first ball 7 is rolled on the inner wall of the piston 6 relative to one side of the inner gear ring 2, a cast iron wear-resistant strip 8 is fixedly connected to the inner wall of the inner gear ring 2, the first ball 7 is rollingly arranged on the side wall of the cast iron wear-resistant strip 8, a sealing ring 9 is fixedly connected to the inner wall of the piston 6, the inner wall of the sealing ring 9 is pressed against the side wall of the first ball 7, a sealing pad 10 is fixedly connected to one end of the piston 6 located inside the groove, and the side wall of the sealing pad 10 is fitted on the inner wall of the rotor 3 located in the groove.

[0023] A guide groove is provided on the inner wall of the groove where the rotor 3 is located. A guide block 11 is slidably provided on the inner wall of the guide groove where the rotor 3 is located. The side wall of the guide block 11 is fixedly connected to the side wall of the piston 6. A second ball 12 is rolled inside the guide block 11. The second ball 12 is rolled on the inner wall of the guide groove where the rotor 3 is located.

[0024] During use, oil is delivered to different oil delivery holes 4 through the oil outlet inside the cycloid hydraulic motor body 1, and oil is pumped out from the remaining oil delivery holes 4 at the same time, so that different pistons 6 can be extended or retracted respectively. After the piston block 6 is pushed out, it slides along the arc of the inner wall of the inner gear ring 2 through the first ball 7, which can push the rotor 3 to rotate so that the rotor 3 can be used normally. The cast iron wear-resistant strip 8 has a strong wear resistance. When the first ball 7 rolls along the surface of the cast iron wear-resistant strip 8, the wear of the inner gear ring 2 can be reduced to ensure the service life and use effect of the inner gear ring 2. The sealing ring 9 can prevent metal debris from entering the gap between the piston 6 and the first ball 7 to prevent the first ball 7 from getting stuck and causing accelerated wear. The sealing pad 10 can ensure the sealing of the oil inside the groove to prevent the hydraulic oil from leaking or contacting with metal debris, affecting the use. The guide block 11 slides along the inside of the guide groove to improve the stability of the movement of the rotor 3. The second ball 12 can reduce the wear of the guide block 11 inside the guide groove.

[0025] In order to further improve the sealing performance of the oil inside the groove, Figure 1-4 As shown, a rubber block 13 is fixedly connected to the side wall of the sealing pad 10, and the rubber block 13 is slidably set on the inner wall of the rotor 3 located in the guide groove. A reinforcing frame 14 is fixedly connected to the inner wall of the top end of the rubber block 13, and the top end of the reinforcing frame 14 is fixedly connected to the bottom of the guide block 11. A plurality of anti-deformation sheets 15 are fixedly connected to the bottom of the reinforcing frame 14, and the plurality of anti-deformation sheets 15 extend to the interior of the rubber block 13 respectively.

[0026] The rubber block 13 slides along the inner wall of the guide groove, which can further improve the sealing of the oil inside the groove. At the same time, the reinforcing frame 14 and the anti-deformation sheet 15 can stably support the rubber block 13 to prevent the rubber block 13 from deforming when sliding and affecting the sealing effect.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wear-resistant cycloid hydraulic motor, comprising a cycloid hydraulic motor body (1), Features: The cycloid hydraulic motor body (1) is fixedly connected to an inner gear ring (2), and an inner wall of the inner gear ring (2) is provided with an arc surface. The cycloid hydraulic motor body (1) is located inside the inner gear ring (2) and is rotatably connected to a rotor (3). A plurality of oil delivery holes (4) are provided around the rotor (3), and a plurality of grooves (5) are provided around the rotor (3). The plurality of oil delivery holes (4) extend to the interior of the plurality of grooves (5). A piston (6) is slidably provided on the inner wall of the groove (5) of the rotor (3). A first ball (7) is provided on the inner wall of the piston (6) that rolls relative to one side of the inner gear ring (2). A cast iron wear-resistant strip (8) is fixedly connected to the inner wall of the inner gear ring (2), and the first ball (7) is rollably provided on the side wall of the cast iron wear-resistant strip (8).

2. A wear-resistant gerotor hydraulic motor according to claim 1, Features: The inner wall of the piston (6) is fixedly connected to a sealing ring (9), and the inner wall of the sealing ring (9) is pressed against the side wall of the first ball (7). One end of the piston (6) located inside the groove is fixedly connected to a sealing pad (10), and the side wall of the sealing pad (10) is fitted against the inner wall of the rotor (3) located in the groove.

3. A wear-resistant gerotor hydraulic motor according to claim 1, Features: The inner wall of the rotor (3) located in the groove is provided with a guide groove, and the inner wall of the rotor (3) located in the guide groove is provided with a guide block (11) for sliding, and the side wall of the guide block (11) is fixedly connected to the side wall of the piston (6).

4. A wear-resistant gerotor hydraulic motor according to claim 3, Features: A second ball (12) is provided inside the guide block (11) for rolling motion, and the second ball (12) is arranged on the inner wall of the guide groove of the rotor (3) for rolling motion.

5. A wear-resistant gerotor hydraulic motor according to claim 2, Features: A rubber block (13) is fixedly connected to the side wall of the sealing pad (10), and the rubber block (13) is slidably arranged on the inner wall of the rotor (3) located in the guide groove.

6. A wear-resistant gerotor hydraulic motor according to claim 5, Features: A reinforcing frame (14) is fixedly connected to the inner wall of the top end of the rubber block (13); the top end of the reinforcing frame (14) is fixedly connected to the bottom of the guide block (11); the bottom of the reinforcing frame (14) is fixedly connected to a plurality of anti-deformation sheets (15); the plurality of anti-deformation sheets (15) respectively extend into the interior of the rubber block (13).

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