Bent shaft motor

Abstract

The utility model belongs to the technical field of hydraulic systems, and discloses a bent shaft motor, a cylinder body of the bent shaft motor is provided with a first mounting hole and a through hole which extend along a first direction and are communicated with each other, and a central plunger is mounted in the first mounting hole; one part of the gasket is arranged in the first mounting hole and abuts against the end face of the center plunger, the other part of the gasket is arranged in the through hole, and the gasket is configured to penetrate through the through hole and can be taken out or mounted through the through hole; the blocking piece is arranged on the side wall of the through hole, the blocking piece can be kept fixed relative to the side wall of the through hole in the first direction and abut against the gasket in the first direction, and therefore the gasket is limited in the first direction. And the gasket needing to be mounted is placed into the first mounting hole again through the through hole, and then assembly can be completed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a bent axis motor. Background Art

[0002] The hydraulic motor is an actuator in the hydraulic system, used to convert the hydraulic energy of the hydraulic system into mechanical energy. The bent axis motor is a type of hydraulic motor, such as Figure 1 As shown, the bent axis motor in the prior art generally includes a cylinder body 1, a center plunger 2 movably arranged on the cylinder body 1, and a tapered plunger 3, wherein the center portion of the cylinder body 1 has a mounting hole 11, and the center plunger 2 is arranged in the mounting hole 11. In addition, a gasket 4 is provided on the side of the bottom wall of the center plunger 2 close to the mounting hole 11. During the assembly process of the above structure, it is necessary to first install a standard gasket, measure the extension amount of the center plunger 2, and select a gasket 4 of appropriate thickness based on the thickness of the standard gasket, and then remove the standard gasket and replace it with the selected gasket 4. However, when the standard gasket is replaced with the gasket 4 in the above structure, the center plunger 2 needs to be removed from the mounting hole, and then the gasket 4 needs to be replaced. That is to say, during the entire assembly process, the gasket and the center plunger 2 need to be assembled twice, and the installation process is cumbersome. Utility Model Content

[0003] The utility model provides a bent axis motor to solve the problem in the prior art that when replacing a gasket, a central plunger needs to be removed from a mounting hole and then the gasket needs to be replaced, resulting in a cumbersome installation process.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A bent axis motor comprises a cylinder body, an output shaft, a central plunger and a plurality of side plungers, wherein the central plunger and the plurality of side plungers are movably arranged on the cylinder body and are connected to the output shaft with a ball joint;

[0006] The cylinder body has a first mounting hole and a through hole extending in a first direction and communicating with each other, and the central plunger is installed in the first mounting hole; the bent axis motor further includes:

[0007] a gasket, a portion of which is disposed in the first mounting hole and abuts against the end surface of the center plunger, and another portion of which is disposed in the through hole, the gasket being configured to pass through the through hole;

[0008] The blocking member is arranged on the side wall of the through hole, and the blocking member can be kept fixed relative to the side wall of the through hole along a first direction and abut against the gasket along the first direction.

[0009] As a preferred solution of the bent axis motor, a side wall of the through hole is provided with an annular groove, and the blocking member is a retaining spring arranged in the annular groove.

[0010] As a preferred solution of the bent axis motor, the inner diameter of the through hole is smaller than the outer diameter of the central plunger.

[0011] As a preferred solution for the bent axis motor, a receiving groove is provided at one end of the center plunger close to the gasket, and an elastic member is provided in the receiving groove. The two ends of the elastic member are respectively in contact with the gasket and the bottom wall of the receiving groove, and are used to provide an elastic force to move the center plunger in a direction away from the gasket.

[0012] As a preferred solution for the bent axis motor, the cylinder body also has a plurality of second mounting holes extending along the first direction, and the plurality of second mounting holes are arranged at intervals along the circumferential direction of the first mounting hole, and the plurality of side pistons are movably arranged in the plurality of second mounting holes in a one-to-one correspondence.

[0013] As a preferred solution of the bent axis motor, the plurality of second mounting holes are all connected to an oil inlet hole, and the plurality of oil inlet holes are all used to connect to a hydraulic oil source.

[0014] As a preferred solution of the bent axis motor, a sealing ring is provided on the outer wall of the side plunger.

[0015] As a preferred solution of the bent axis motor, an extending direction of the oil inlet hole forms an angle with an extending direction of the second mounting hole.

[0016] As a preferred solution of the bent axis motor, the cross-section of the second mounting hole is circular, the side piston has a first end away from the output shaft and a second end close to the output shaft, and the diameter of the first end is larger than the diameter of the second end.

[0017] As a preferred solution of the bent axis motor, the output shaft is rotatably disposed on the cylinder body via a bearing.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a bent axis motor, comprising a cylinder body and a center plunger, wherein the cylinder body has a first mounting hole and a through hole extending in a first direction and interconnected, and the center plunger is mounted in the first mounting hole; the bent axis motor also comprises a gasket and a blocking member, wherein a portion of the gasket is disposed in the first mounting hole and abuts against the end face of the center plunger, and another portion is disposed in the through hole, and the gasket is configured to pass through the through hole, and the gasket can be removed or installed through the through hole. The blocking member is disposed on the side wall of the through hole, and the blocking member can remain fixed relative to the side wall of the through hole in the first direction and abut against the gasket in the first direction, thereby limiting the gasket in the first direction, preventing the gasket from falling out of the through hole during normal operation of the bent axis motor, so that the gasket can stably abut against the end face of the center plunger to provide support and cushioning. When assembling the bent axis motor, after installing the standard gasket and taking measurements, it is only necessary to remove the standard gasket from the through hole and re-insert the gasket to be installed into the first mounting hole through the through hole to complete the assembly; in addition, when the gasket needs to be replaced after long-term use, it is only necessary to take out and put in the gasket through the through hole without removing the center plunger, and the replacement process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a bent axis motor in the prior art;

[0021] Figure 2 It is a structural diagram of the bent axis motor in an embodiment of the present utility model.

[0022] In the picture:

[0023] 1. Cylinder body; 11. Mounting hole; 2. Center plunger; 3. Conical plunger; 4. Gasket;

[0024] 100, cylinder body; 101, first mounting hole; 102, through hole; 103, second mounting hole; 104, oil inlet hole;

[0025] 200, center plunger; 201, receiving groove;

[0026] 300, side plunger; 301, sealing ring installation groove;

[0027] 400, gasket;

[0028] 500. Circlip. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] The bent axis motor in the prior art usually includes a cylinder body, a center plunger movably arranged in the cylinder body, and a tapered plunger, wherein the center portion of the cylinder body has a mounting hole, and the center plunger is arranged in the mounting hole. In addition, a gasket is provided on the side of the bottom wall of the center plunger close to the mounting hole. During the assembly process of the above structure, it is necessary to first install a standard gasket, measure the extension of the center plunger, and select a gasket of appropriate thickness based on the thickness of the standard gasket, and then remove the standard gasket and replace it with the selected gasket. However, when replacing the standard gasket with a gasket in the above structure, it is necessary to remove the center plunger from the mounting hole and then replace the gasket. That is to say, during the entire assembly process, the gasket and the center plunger need to be assembled twice, and the installation process is cumbersome.

[0034] In response to the above problems, this embodiment provides a bent axis motor to solve the problem in the prior art that when replacing the gasket, the center plunger needs to be removed from the mounting hole and then the gasket needs to be replaced, resulting in a cumbersome installation process. The motor can be used in the field of hydraulic system technology.

[0035] Reference Figure 2 The bent axis motor includes a cylinder body 100, an output shaft, a central plunger 200 and a plurality of side plungers 300. The central plunger 200 and the plurality of side plungers 300 are movably arranged on the cylinder body 100 and are connected to the output shaft by a ball joint. Thus, the side plungers 300 can be driven to reciprocate relative to the cylinder body 100 through a hydraulic system to drive the output shaft to rotate, thereby completing the power output.

[0036] Continue to refer to Figure 2 The cylinder body 100 has a first mounting hole 101 and a through hole 102 extending along a first direction and interconnected, wherein the first mounting hole 101 and the through hole 102 are arranged in sequence along the first direction. The center plunger 200 is mounted in the first mounting hole 101; the bent axis motor further includes a gasket 400 and a blocking member, a portion of the gasket 400 is disposed in the first mounting hole 101 and abuts against the end face of the center plunger 200, and the other portion is disposed in the through hole 102. The gasket 400 is configured to pass through the through hole 102 and can be removed or installed through the through hole 102. Specifically, the gasket 400 is cylindrical or annular, the cross-section of the through hole 102 is circular, and the outer diameter of the gasket 400 does not exceed the inner diameter of the through hole 102. A blocking member is provided on the side wall of the through hole 102. The blocking member can remain fixed relative to the side wall of the through hole 102 along a first direction and abut against the gasket 400 along the first direction, thereby limiting the gasket 400 in the first direction and preventing the gasket 400 from falling out of the through hole 102 during normal operation of the bent axis motor. This allows the gasket 400 to stably abut against the end face of the center plunger 200 to provide support and cushioning. When assembling the bent axis motor, after installing a standard gasket and taking measurements, it is only necessary to remove the standard gasket from the through hole 102 and replace the gasket 400 to be installed in the first mounting hole 101 through the through hole 102 to complete the assembly. In addition, when the gasket 400 needs to be replaced after long-term use, it is only necessary to remove and insert the gasket 400 through the through hole 102 without removing the center plunger 200, making the replacement process simple.

[0037] Continue to refer to Figure 2 The side wall of the through hole 102 is provided with an annular groove, and the blocking member is a retaining spring 500 arranged in the annular groove. Therefore, when the retaining spring 500 is installed in the annular groove, the gasket 400 can be limited along the first direction by the retaining spring 500 to prevent the gasket 400 from falling out of the through hole 102. In addition, when the gasket 400 needs to be removed, it is only necessary to squeeze the retaining spring 500 to cause the retaining spring 500 to undergo elastic deformation, so that the retaining spring 500 can be taken out of the through hole 102, and then the gasket 400 can be taken out of the through hole 102. The operation is simple.

[0038] As an alternative, the blocking member can also be a baffle that can be extended and retracted relative to the side wall of the through hole 102. When the baffle is extended relative to the side wall of the through hole 102, the baffle can also limit the gasket 400 along the first direction. When the baffle is retracted relative to the side wall of the through hole 102, the gasket 400 can be removed from the through hole 102.

[0039] Continue to refer to Figure 2 The inner diameter of the through hole 102 is smaller than the outer diameter of the center plunger 200, so that the center plunger 200 cannot pass through the through hole 102. Therefore, during the process of disassembling and assembling the gasket 400, the center plunger 200 can always be located in the first mounting hole 101, preventing the center plunger 200 from falling out of the first mounting hole 101.

[0040] Continue to refer to Figure 2 The end of the center plunger 200 proximate to the gasket 400 defines a receiving groove 201. An elastic member is disposed within the receiving groove 201. The ends of the elastic member abut against the gasket 400 and the bottom wall of the receiving groove 201, respectively, and are used to provide an elastic force that causes the center plunger 200 to move away from the gasket 400, thereby pressing the center plunger 200 against the output shaft, further stabilizing the rotational connection between the two. In this embodiment, the elastic member is a compression spring. After the blocking member is mounted on the side wall of the through hole 102 and remains fixed relative to the side wall of the through hole 102 in the first direction, the gasket 400 and the blocking member provide stable support for one end of the compression spring.

[0041] Optionally, the elastic member is configured to pass through the through hole 102. Specifically, the diameter of the elastic member is smaller than the inner diameter of the through hole 102. This configuration allows the user to remove the elastic member from the receiving groove 201 through the through hole 102, or to insert the elastic member into the receiving groove 201, thereby facilitating replacement of the elastic member. Further, optionally, the receiving groove 201 is circular, and the inner diameter of the receiving groove 201 is smaller than the inner diameter of the through hole 102.

[0042] Continue to refer to Figure 2 The cylinder body 100 further comprises a plurality of second mounting holes 103 extending along the first direction. The plurality of second mounting holes 103 are arranged at intervals along the circumference of the first mounting hole 101. The plurality of side plungers 300 are movably disposed in the plurality of second mounting holes 103 in a one-to-one correspondence, such that the plurality of side plungers 300 are also spaced apart along the circumference of the cylinder body 100. Furthermore, the center plunger 200 can simultaneously rotate or slide relative to the first mounting hole 101, and the side plungers 300 can simultaneously rotate or slide relative to the second mounting holes 103.

[0043] Continue to refer to Figure 2Each of the plurality of second mounting holes 103 is connected to an oil inlet hole 104. Each of the plurality of oil inlet holes 104 is used to connect to a hydraulic oil source, allowing hydraulic oil to flow in and out of the second mounting holes 103 through the oil inlet holes 104, thereby driving the side plunger 300 to extend or retract, thereby driving the output shaft. Optionally, an oil distribution plate is connected to the side of the cylinder body 100 where the oil inlet holes 104 are provided. The oil distribution plate has a hydraulic oil circuit connected to the oil inlet holes 104.

[0044] Continue to refer to Figure 2 A sealing ring is provided on the outer wall of the side plunger 300 to prevent the hydraulic oil from leaking out of the inner cavity between the side plunger 300 and the bottom wall of the second mounting hole 103, ensuring that the hydraulic oil can drive the side plunger 300 and improving the sealing performance.

[0045] Optionally, an annular sealing ring installation groove 301 is formed on the outer wall of the side plunger 300, and the sealing ring is installed in the sealing ring installation groove 301, thereby preventing the sealing ring from falling out of the sealing ring installation groove 301. Further optionally, the outer wall of the side plunger 300 is provided with a plurality of sealing ring installation grooves 301 spaced apart along its length.

[0046] Continue to refer to Figure 2 The extension direction of the oil inlet hole 104 forms an angle with the extension direction of the second mounting hole 103 , thereby preventing the side plunger 300 from entering the oil inlet hole 104 , so that the side plunger 300 can always be located in the second mounting hole 103 .

[0047] Continue to refer to Figure 2 The cross-section of the second mounting hole 103 is circular, and the side plunger 300 has a first end away from the output shaft and a second end close to the output shaft. The diameter of the first end is larger than the diameter of the second end, thereby allowing a certain offset between the center line of the side plunger 300 and the center line of the second mounting hole 103, so that the rotation of the side plunger 300 relative to the cylinder body 100 is more stable and can absorb certain processing and assembly errors.

[0048] Continue to refer to Figure 2 The output shaft is rotatably arranged on the cylinder body 100 through a bearing, thereby reducing friction and making the rotation of the output shaft relative to the cylinder body 100 more stable through the bearing.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A bent axis motor comprising a cylinder body (100), an output shaft, a central plunger (200), and a plurality of side plungers (300), wherein the central plunger (200) and the plurality of side plungers (300) are movably arranged on the cylinder body (100) and are connected to the output shaft by a ball joint; It is characterized in that The cylinder body (100) has a first mounting hole (101) and a through hole (102) extending in a first direction and communicating with each other, and the central plunger (200) is installed in the first mounting hole (101); the bent axis motor further includes: a gasket (400), a portion of which is disposed in the first mounting hole (101) and abuts against the end surface of the center plunger (200), and another portion of which is disposed in the through hole (102), the gasket (400) being configured to be able to pass through the through hole (102); A blocking member is provided on the side wall of the through hole (102), and the blocking member can be kept fixed relative to the side wall of the through hole (102) along a first direction and abut against the gasket (400) along the first direction.

2. The bent axis motor according to claim 1, wherein: A ring groove is formed on the side wall of the through hole (102), and the blocking member is a retaining spring (500) arranged in the ring groove.

3. The bent axis motor according to claim 1, wherein: The inner diameter of the through hole (102) is smaller than the outer diameter of the central plunger (200).

4. The bent axis motor according to claim 1, wherein: An accommodating groove (201) is provided at one end of the central plunger (200) close to the gasket (400), and an elastic member is provided in the accommodating groove (201). The two ends of the elastic member are respectively in contact with the gasket (400) and the bottom wall of the accommodating groove (201), and are used to provide an elastic force for causing the central plunger (200) to move in a direction away from the gasket (400).

5. The bent axis motor according to any one of claims 1 to 4, characterized in that: The cylinder body (100) further comprises a plurality of second mounting holes (103) extending along the first direction, wherein the plurality of second mounting holes (103) are arranged at intervals along the circumferential direction of the first mounting hole (101), and the plurality of side pistons (300) are movably arranged in the plurality of second mounting holes (103) in a one-to-one corresponding manner.

6. The bent axis motor according to claim 5, wherein: The plurality of second mounting holes (103) are all connected to an oil inlet hole (104), and the plurality of oil inlet holes (104) are all used to connect to a hydraulic oil source.

7. The bent axis motor according to claim 6, wherein: The outer wall of the side plunger (300) is provided with a sealing ring.

8. The bent axis motor according to claim 6, wherein: The extending direction of the oil inlet hole (104) forms an angle with the extending direction of the second mounting hole (103).

9. The bent axis motor according to claim 5, wherein: The cross section of the second mounting hole (103) is circular, and the side plunger (300) has a first end away from the output shaft and a second end close to the output shaft, and the diameter of the first end is larger than the diameter of the second end.

10. The bent axis motor according to any one of claims 1 to 4, characterized in that: The output shaft is rotatably mounted on the cylinder body (100) via a bearing.

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