Insert for swash plate control device, swash plate control assembly and hydraulic piston pump

Abstract

The application provides a plug-in piece for a swash plate control device, characterized in that the plug-in piece (200) has a cylindrical profile and comprises: a thin-walled hole (201) positioned perpendicularly to the axis of the cylinder and bored on the side surface (200a) of the plug-in piece (200), wherein the plug-in piece (200) is configured to be capable of being inserted into a groove (1084) formed on the side wall (1083) of the swash plate control device (108).

Description

Technical Field

[0001] This application relates to an insert for a swashplate control device. Additionally, this application also relates to a swashplate control assembly and a hydraulic piston pump. Background Technology

[0002] Hydraulic piston pumps are widely used in industry, energy, vehicles, and even the medical field due to their excellent characteristics such as high performance, high efficiency, and stability and reliability, and their application areas are still expanding.

[0003] To better meet the needs of various applications, research on hydraulic piston pumps is moving towards automation and intelligence. One example is the dynamic control of the swashplate of a hydraulic piston pump using a servo motor. The servo motor can be electrically connected to the swashplate control device of the hydraulic piston pump, and based on whether the pressure in the hydraulic cylinder of the swashplate control device has reached the desired pressure, it determines whether to control the swashplate control device to change the swashplate angle.

[0004] However, during the actual operation of a hydraulic piston pump, due to various reasons, a portion of the hydraulic cylinder in the swashplate control device continuously leaks outside the cylinder, causing the actual pressure in the cylinder to be lower than the desired pressure. This can adversely affect the automatic control of the hydraulic piston pump, and therefore it is desirable to avoid it. However, the existing technical solutions are difficult to manufacture and assemble, and are costly.

[0005] Considering, but not limited to, the various situations described above, it is desirable to provide a novel device for swashplate control devices and hydraulic piston pumps to alleviate or even avoid the aforementioned problems. Utility Model Content

[0006] This application aims to provide an insert for a swashplate control device, which is advantageous over the prior art in at least one respect.

[0007] To this end, this application provides, in one aspect, an insert for a swashplate control device, characterized in that the insert has a cylindrical profile and includes: a thin-walled hole positioned perpendicular to the axis of the cylinder and formed on a side surface of the insert, wherein the insert is configured to be inserted into a groove formed on the side wall of the swashplate control device.

[0008] In one feasible exemplary embodiment, the thin-walled holes are a plurality of thin-walled holes, which are arranged in a straight line or in a circular arrangement.

[0009] In one feasible exemplary embodiment, the thin-walled hole is connected to a second hole, the diameter of which is configured to be larger than that of the thin-walled hole, wherein the insert is configured such that hydraulic fluid from the inlet channel can pass sequentially through the thin-walled hole and the second hole.

[0010] In one feasible exemplary embodiment, the diameter of the second hole is 3 to 10 times or more the diameter of the thin-walled hole.

[0011] In one feasible exemplary embodiment, the insert for the swashplate control device further includes a positioning element disposed on the top surface of the insert, the positioning element being configured to indicate the direction of a fluid passage in the insert.

[0012] In one feasible exemplary embodiment, the positioning element is formed as a positioning groove, the extension direction of which is parallel to the length direction of the thin-walled hole.

[0013] In one feasible exemplary embodiment, when the insert has a thin-walled hole and a second hole, the positioning element is further configured to indicate the relative positional relationship between the thin-walled hole and the second hole of the insert.

[0014] In one feasible exemplary embodiment, the side surface of the insert is provided with friction features to prevent accidental rotation of the insert after it is installed into the swashplate control device.

[0015] In another aspect of this application, a swashplate control assembly is also provided, characterized in that it includes: a swashplate control device, and an insert for the swashplate control device as described above, wherein a groove is provided on the side wall of the swashplate control device, the size and shape of the groove being configured to match the contour of the insert, such that the insert can be directly inserted into the groove from the outside of the swashplate control device.

[0016] In another aspect of this application, a hydraulic piston pump is also provided, characterized in that it includes: a cartridge for a swashplate control device as described above or a swashplate control assembly as described above.

[0017] The insert for a swashplate control device, the swashplate control assembly, and the hydraulic piston pump according to this application offer numerous advantages, including convenient and effective compensation for fluid leakage in the hydraulic cylinder of the swashplate control device while saving manufacturing and installation resources. Attached Figure Description

[0018] Figure 1 A hydraulic piston pump according to one embodiment of this application is shown.

[0019] Figure 2A swashplate control assembly according to one embodiment of this application is shown, wherein a swashplate control device and a plug-in are shown.

[0020] Figure 3 A cross-sectional view of an insert for a swashplate control device according to one embodiment of this application is shown.

[0021] Figure 4 It shows Figure 3 The diagram shows the outline of the insert for the swashplate control device. Detailed Implementation

[0022] Some feasible embodiments of this application are described below with reference to the accompanying drawings. It should be noted that the drawings are not drawn to scale. Some details may be enlarged for clarity, while some details that are not necessary to show have been omitted.

[0023] like Figure 1 As shown, a hydraulic piston pump 100 according to one embodiment of this application is illustrated.

[0024] The hydraulic plunger pump 100 includes a housing 101 with an opening and an end plate 102 covering the opening of the housing to close the housing 101. A distribution plate may be configured on the end plate 102 to guide the flow of hydraulic fluid in and out.

[0025] The hydraulic plunger pump 100 also includes a cylinder bore (only one is shown in the figure, but it can be understood that there may actually be multiple cylinders) positioned on a cylinder body 103 and plungers (not shown) that mate with the cylinder bore. The cylinder body 103 is mounted on a spindle 105 and configured to rotate with the spindle 105. The cylinder body 103 may have a (basically) cylindrical geometry. The axis of rotation of the spindle 105 coincides with the central axis of the cylinder body 103. The plurality of plungers of the hydraulic plunger pump 100 are also circumferentially and evenly distributed around the spindle 105.

[0026] The cylinder body 103 has multiple cylinder bores (not shown) adapted for reciprocating motion of multiple plungers. The reciprocating motion of the multiple plungers in the multiple cylinder bores allows hydraulic fluid to be drawn in and discharged from the multiple cylinder bores accordingly (through a distribution plate).

[0027] It is understood that the number of the plurality of plungers can be three or more, for example, five, seven, or nine. In some specific cases, the number of the plurality of plungers can also be an even number, such as four, six, eight, or ten. It is understood that the number of the plurality of cylinder bores is configured to be equal to the number of the plurality of plungers.

[0028] The hydraulic piston pump 100 also includes a swashplate 107. The plurality of pistons are rotatably secured to the swashplate 107. The stroke of the pistons reciprocating within the cylinder bore (also referred to as piston stroke) is related to the tilt angle of the swashplate 107. The larger the tilt angle of the swashplate 107, the greater the stroke of the pistons within the cylinder bore. It can be understood that the tilt angle of the swashplate 107 refers to the relative angle between the central axis of the swashplate 107 and the axis of the main shaft 105.

[0029] The tilt angle of the swashplate 107 is adjustable. For example... Figure 1 As shown, the swashplate 107 is configured to adjust its tilt angle via a swashplate control device 108 positioned on one side (shown as the upper side in the figure). The tilt angle can be adjusted, for example, within a range of approximately 0-16 degrees, approximately 0-18 degrees, or approximately 0-20 degrees. It is understood that the tilt angle can also be adjusted within a wider range.

[0030] The swashplate control device 108 includes a control valve 1081 and a hydraulic cylinder 1082 controlled by the control valve 1081.

[0031] like Figure 2 As shown, the control valve 1081 includes a valve core 1081a and three hydraulic fluid channels: an inlet channel 1081b, an outlet channel 1081c, and a drain channel 1081d. By controlling the movement of the valve core 1081a, hydraulic fluid can flow into the hydraulic cylinder 1082 via the inlet channel 1081b and the outlet channel 1081c, thereby increasing the fluid volume in the hydraulic cylinder 1082 and pushing the swashplate 107 to change its tilt angle.

[0032] A groove 1084 may be provided on the side wall 1083 of the swashplate control device 108. The groove 1084 is configured to allow fluid communication (e.g., through the opening 1085) between the inlet channel 1081b and the hydraulic cylinder 1082.

[0033] The size and shape of the groove 1084 are configured to match the contour of the insert 200, allowing the insert 200 to be directly inserted into the groove 1084 from the outside of the swashplate control device 108. Thus, fluid in the inlet channel 1081b can flow into the hydraulic cylinder 1082 through the thin-walled hole 201 in the insert 200. For example, the insert 200 can be positioned between the inlet channel 1081b and the hydraulic cylinder 1082, such as... Figure 2 As shown. It can be understood that the aspect ratio of a thin-walled hole is less than or equal to 0.5. Additionally, it can be understood that... Figure 2 The graphic representation of the thin-walled hole 201 shown does not represent the actual scale, but is exaggerated for the purpose of clearly expressing the structure.

[0034] One possibility is that the swashplate control device 108 may have multiple grooves 1084. These grooves are respectively configured to allow fluid communication between the inlet channel 1081b and the hydraulic cylinder 1082. The number of grooves 1084 can be determined based on the power of the hydraulic plunger pump 100 and / or the leakage rate of the hydraulic cylinder 1082.

[0035] like Figure 3 and Figure 4 As shown, one embodiment of the insert 200 is illustrated, with cross-sectional and outline views of the insert shown respectively. As shown, the insert 200 may have a cylindrical outline.

[0036] The insert 200 has a thin-walled hole 201. The thin-walled hole 201 can be positioned perpendicular to the axis of the cylinder and is drilled on the side surface 200a of the insert 200.

[0037] The thin-walled orifice 201 is configured to allow fluid to pass through the inlet channel 1081b without significantly reducing pressure. In this way, the fluid pressure in the inlet channel 1081b and the hydraulic cylinder 1082 can be balanced. This thin-walled orifice 201 allows hydraulic fluid to pass through regardless of the viscosity characteristics of the hydraulic fluid, thus preventing blockage. This extends the service life of the cartridge 200 and the hydraulic plunger pump 100, and significantly reduces inspection and maintenance costs.

[0038] It is understandable that the diameter of the thin-walled hole 201 can be circular. This not only facilitates the opening of the thin-walled hole 201, but also reduces the flow resistance and / or interference of the hydraulic fluid.

[0039] The thin-walled hole 201 is shown as one in the figure. It is understood that there can also be multiple thin-walled holes 201. The number of thin-walled holes 201 can be determined by the leakage rate of the hydraulic cylinder 1082. Multiple thin-walled holes 201 can be arranged in a straight line (linear array) or in a circular arrangement (circular array).

[0040] For fluid communication, the thin-walled hole 201 may be connected to a second hole 202. The diameter of the second hole 202 is configured to be larger than the diameter of the thin-walled hole 201. For example, the diameter of the second hole 202 is 3 to 10 times larger than the diameter of the thin-walled hole 201, such as more than 3 times, 5 times, or 10 times larger. The second hole 202 can be a drill hole. In this way, the machining process can be simplified and machining efficiency improved. Accordingly, it can be understood that in some examples, the second hole 202 is not necessary.

[0041] In this configuration, the insert 200 is arranged such that hydraulic fluid from the inlet channel 1081b can pass sequentially through the thin-walled hole 201 and the second hole 202, thereby entering the hydraulic cylinder 1082.

[0042] The insert 200 may further include a positioning element 203. The positioning element 203 may be configured as a positioning groove disposed on the top surface 200b of the insert 200, such as... Figure 3-4 As shown. When the insert 200 is inserted into the swashplate control device 108, the top surface 200b faces the outside of the swashplate control device 108.

[0043] The positioning element 203 can be configured to indicate the direction of the fluid channel (thin-walled hole length) in the insert 200, for example, parallel to the direction of the fluid channel. For example, the positioning element 203 can be formed as a positioning groove whose extending direction is parallel to the length of the thin-walled hole 201 (e.g., Figure 3-4 (As shown). In this way, when the insert 200 is inserted into the groove 1084 of the swashplate control device 108, the orientation of the fluid channel of the insert 200 can be obtained by the positioning member 203, thereby facilitating the alignment of the fluid channel of the insert 200 with the fluid channel of the groove 1084. As a result, hydraulic fluid from the inlet channel 1081b can flow into the hydraulic cylinder 1082 through the insert 200 arranged in the groove 1084.

[0044] When the insert 200 has a thin-walled hole 201 and a second hole 202, the positioning member 203 can also be configured to indicate the relative positional relationship between the thin-walled hole 201 and the second hole 202 of the insert, for example by arranging corresponding indicator marks on the positioning member 203 or by using arrows to indicate the direction of the fluid channel from upstream to downstream.

[0045] One possibility is that the bottom surface 200c of the insert 200 is configured to be different from the top surface 200 or to lack positioning elements. This allows for easy differentiation between the top surface 200b and the bottom surface 200c of the insert 200, improving installation efficiency.

[0046] Another possibility is that the bottom surface 200c of the insert 200 can also be equipped with a positioning element 203. In this way, the insert 200 can also be installed with its bottom surface 200c facing outwards from the swashplate control device 108, eliminating the need to distinguish between the top surface 200b and the bottom surface 200c of the insert 200, thus simplifying the installation process.

[0047] The side surface 200a of the insert may also be provided with friction features. The friction features may be, for example, an uneven surface. The friction features are configured to prevent accidental rotation of the insert 200 after it is installed in the swashplate control device 108 (e.g., caused by vibrations from the operation of the hydraulic piston pump 100).

[0048] It is understood that this application also relates to a swashplate control assembly, comprising: a swashplate control device 108 as described above, and an insert for the swashplate control device as described above. A groove 1084 is provided on the sidewall 1083 of the swashplate control device 108, the size and shape of which are configured to match the contour of the insert 200, such that the insert 200 can be directly inserted into the groove 1084 from the outside of the swashplate control device 108.

[0049] Additionally, this application may also relate to a plunger pump, particularly a hydraulic plunger pump, which includes: a cartridge for a swashplate control device as described above or the aforementioned swashplate control assembly.

[0050] As used herein, the term "comprising" is open-ended and includes one or more of the stated features, elements, components, or functions, but does not exclude the presence or addition of one or more other features, elements, components, functions, or combinations thereof.

[0051] The foregoing description of embodiments of this application is provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Within the scope of this application, it will be understood that the various aspects, embodiments, examples, and alternatives listed in the foregoing paragraphs, claims, and / or description and figures, particularly their individual features, can be carried out independently or in any combination. That is, all embodiments and / or features of any embodiment can be carried out in any manner and / or combined, unless such features are incompatible. It will be understood that many modifications and variations are available to those skilled in the art. The embodiments were chosen and described to properly explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the various embodiments of the invention and the various modifications suitable for the intended particular use. The applicant reserves the right to accordingly amend any originally filed claims or file any new claims, including amending any originally filed claims to dependent on and / or incorporate any features of any other claim, even if not originally claimed in this way.

Claims

1. A plug-in component for a swashplate control device, characterized in that, The insert (200) has a cylindrical profile and includes: A thin-walled hole (201) is positioned perpendicular to the axis of the cylinder and is drilled on the side surface (200a) of the insert (200). The insert (200) is configured to be inserted into a groove (1084) formed in the side wall (1083) of the swashplate control device (108).

2. The insert for a swashplate control device according to claim 1, characterized in that, The thin-walled holes (201) are multiple thin-walled holes, which are arranged in a straight line or in a circular arrangement.

3. The insert for a swashplate control device according to claim 1, characterized in that, The thin-walled hole (201) is connected to a second hole (202), the diameter of which is configured to be larger than that of the thin-walled hole (201), wherein the insert (200) is configured to allow hydraulic fluid from the inlet channel (1081b) to pass sequentially through the thin-walled hole (201) and the second hole (202).

4. The insert for a swashplate control device according to claim 3, characterized in that, The diameter of the second hole (202) is 3 to 10 times or more than the diameter of the thin-walled hole (201).

5. The insert for a swashplate control device according to any one of claims 1-4, characterized in that, Also includes: A positioning element (203) is arranged on the top surface (200b) of the insert (200) and is configured to indicate the direction of the fluid passage in the insert (200).

6. The insert for a swashplate control device according to claim 5, characterized in that, The positioning element (203) is formed as a positioning groove, and the extension direction of the positioning groove is parallel to the length direction of the thin-walled hole (201).

7. The insert for a swashplate control device according to claim 5, characterized in that, In the case where the insert (200) has a thin-walled hole (201) and a second hole (202), the positioning member (203) is also configured to indicate the relative positional relationship between the thin-walled hole (201) and the second hole (202) of the insert.

8. The insert for a swashplate control device according to any one of claims 1-4, characterized in that, The side surface (200a) of the insert is provided with friction features to prevent accidental rotation of the insert (200) after it is installed into the swashplate control device (108).

9. A swashplate control assembly, characterized in that, include: Swashplate control device (108), and Insert (200) for a swashplate control device according to any one of claims 1-8. Among them, a groove (1084) is provided on the side wall (1083) of the swashplate control device (108). The size and shape of the groove (1084) are configured to match the contour of the insert (200), so that the insert (200) can be directly inserted into the groove (1084) from the outside of the swashplate control device (108).

10. A hydraulic plunger pump, characterized in that, include: The insert for a swashplate control device according to any one of claims 1-8 or the swashplate control assembly according to claim 9.

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