Fixing device and hydraulic system

Abstract

The utility model discloses a fixing device and hydraulic system. The fixing device includes casing (1), oil supplementing conduit (3) and vibration isolation bushing (4). The casing (1) has first flow channel (12) and the mounting hole (11) in communication with first flow channel (12). The casing (1) is used for fixing the hydraulic pump (2) with oil suction pipe (21). The oil suction pipe (21) is located in the mounting hole (11). The oil suction pipe (21) has second flow channel (211). First flow channel (12) is communicated with second flow channel (211) through oil supplementing conduit (3). The vibration isolation bushing (4) is located in the mounting hole (11), and the vibration isolation bushing (4) is sleeved on the oil suction pipe (21). When the fixing device supports and fixes the hydraulic pump (2), the vibration isolation bushing (4) can absorb the force and vibration of alternating load, and improve the reliability of the fixing device.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic technology, and in particular relates to a fixing device and hydraulic system. Background Technology

[0002] A hydraulic pump is a power component that converts the mechanical energy output from a prime mover into hydraulic energy, providing oil with specified pressure and flow rate for the entire hydraulic system.

[0003] In existing technologies, hydraulic pumps are typically fixed to the housing using flanges and bolts. However, this method of connection to the housing can easily cause the bolts to loosen under prolonged alternating loads, thus affecting the stable operation of the hydraulic pump and resulting in low reliability. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] This utility model provides a fixing device, including:

[0006] A housing having a first flow channel and a mounting hole communicating with the first flow channel, the housing being used to fix a hydraulic pump having an oil suction pipe located within the mounting hole, the oil suction pipe having a second flow channel;

[0007] Oil replenishment conduit, wherein the first flow channel is connected to the second flow channel via the oil replenishment conduit; and

[0008] Vibration isolation bushing; the vibration isolation bushing is located inside the mounting hole and is sleeved on the oil suction pipe.

[0009] The fixing device of this utility model includes a housing, an oil supply pipe, and a vibration isolation bushing. The housing supports and fixes the hydraulic pump. The vibration isolation bushing, located in the mounting hole, is fitted onto the oil suction pipe. When the fixing device supports and fixes the hydraulic pump, the vibration isolation bushing can absorb the force and vibration of alternating loads, improve the reliability of the fixing device, and avoid affecting the stable operation of the hydraulic pump.

[0010] In some embodiments, the vibration isolation bushing includes:

[0011] Inner support ring;

[0012] A vibration isolation ring, wherein the vibration isolation ring is sleeved on the inner support ring and connected to the inner support ring, and the vibration isolation ring is an elastic structure; and

[0013] An outer support ring is sleeved on the vibration isolation ring and connected to the vibration isolation ring.

[0014] The vibration isolation bushing consists of an inner support ring, a vibration isolation ring, and an outer support ring. The inner support ring transmits the load. The vibration isolation ring absorbs the force and vibration of alternating loads. The outer support ring mates with the housing.

[0015] In some embodiments, the inner wall of the vibration isolation bushing is transition-fitted with the outer wall of the oil suction pipe, and the outer wall of the vibration isolation bushing is clearance-fitted with the inner wall of the housing defining the mounting hole.

[0016] The inner wall of the vibration isolation bushing transitions with the outer wall of the oil suction pipe, making the connection between the vibration isolation bushing and the oil suction pipe tighter. The outer wall of the vibration isolation bushing has a clearance fit with the inner wall of the housing that defines the mounting hole, facilitating the installation of the vibration isolation bushing in the mounting hole.

[0017] In some embodiments, an oil suction plug is also included, which is located in the mounting hole. The first flow channel communicates with the interior of the oil suction plug, and the oil replenishment conduit communicates with the interior of the oil suction plug. One end of the oil suction plug located in the mounting hole abuts against the vibration isolation bushing.

[0018] By setting up an oil suction plug, it is not only convenient to connect the first flow channel and the second flow channel using the oil suction plug and the oil replenishment conduit, but the oil suction plug can also limit the vibration isolation bushing.

[0019] In some embodiments, a first sealing ring is further included, the first sealing ring being located between the oil suction plug and the inner wall of the housing defining the mounting hole, the first sealing ring sealingly connecting the outer wall of the oil suction plug and the inner wall of the housing defining the mounting hole.

[0020] By setting a first sealing ring, a seal is achieved between the oil suction plug and the housing, thus preventing oil leakage.

[0021] In some embodiments, the oil suction plug has a first sealing groove, and the first sealing ring is located in the first sealing groove.

[0022] By setting a first sealing groove on the oil suction plug, the first sealing ring can be installed in the first mounting groove, thus achieving the connection between the first sealing ring and the oil suction plug.

[0023] In some embodiments, the suction pipe has a countersunk hole forming the second flow channel, and one end of the replenishment conduit is connected to the inner wall of the suction pipe defining the countersunk hole.

[0024] By setting a countersunk hole, the oil supply pipe and the oil suction pipe can be connected.

[0025] In some embodiments, a second sealing ring is further included, the second sealing ring being located between the inner wall of the oil replenishment conduit and the inner wall of the oil suction pipe defining the countersunk hole, the second sealing ring sealingly connecting the outer wall of the oil replenishment conduit and the inner wall of the oil suction pipe defining the countersunk hole.

[0026] By setting a second sealing ring, a seal is achieved between the oil supply pipe and the oil suction pipe, thus preventing oil leakage.

[0027] In some embodiments, the housing has an unloading slot that communicates with the mounting hole.

[0028] By setting an unloading slot, when the vibration isolation bushing is damaged, the oil can flow out through the unloading slot, which protects the hydraulic pump and prevents the hydraulic pump from being damaged.

[0029] This utility model also provides a hydraulic system, including:

[0030] The aforementioned fixing device; and

[0031] A hydraulic pump, which is connected to the housing.

[0032] Because the hydraulic system includes the aforementioned fixing device, it also has the advantage of high reliability. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a partial sectional view of a hydraulic system provided in one embodiment of the present invention;

[0035] Figure 2 This is an exploded view of a hydraulic system provided in one embodiment of the present invention;

[0036] Figure 3 This is a cross-sectional view of a vibration isolation bushing provided in one embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of an oil suction plug provided in one embodiment of the present invention. Figure 1 ;

[0038] Figure 5 This is a schematic diagram of the structure of an oil suction plug provided in one embodiment of the present invention. Figure 2 ;

[0039] Figure 6This is a schematic diagram of the structure of an oil replenishment conduit provided in one embodiment of the present invention.

[0040] Figure label:

[0041] 1. Housing; 11. Mounting hole; 12. First flow channel; 13. Unloading groove;

[0042] 2. Hydraulic pump; 21. Oil suction pipe; 211. Second flow channel;

[0043] 3. Oil supply conduit; 31. Third sealing groove; 32. Fourth sealing groove;

[0044] 4. Vibration isolation bushing; 41. Inner support ring; 42. Vibration isolation ring; 43. Outer support ring;

[0045] 5. Oil suction plug; 51. First sealing groove; 52. Second sealing groove; 53. Inlet; 54. Connecting hole;

[0046] 6. First sealing ring;

[0047] 7. Second sealing ring;

[0048] 8. Third sealing ring;

[0049] 9. Fourth sealing ring. Detailed Implementation

[0050] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0051] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0052] A mounting device includes a housing, an oil supply conduit, and a vibration-damping bushing. The housing has a first flow channel and a mounting hole communicating with the first flow channel. The housing is used to mount a hydraulic pump with an oil suction pipe. The oil suction pipe is located within the mounting hole. The oil suction pipe has a second flow channel. The first flow channel communicates with the second flow channel via the oil supply conduit. The vibration-damping bushing is located within the mounting hole. The vibration-damping bushing is fitted onto the oil suction pipe.

[0053] The fixing device of this utility model includes a housing, an oil supply pipe, and a vibration isolation bushing. The housing supports and fixes the hydraulic pump. The vibration isolation bushing, located in the mounting hole, is fitted onto the oil suction pipe. When the fixing device supports and fixes the hydraulic pump, the vibration isolation bushing can absorb the force and vibration of alternating loads, improve the reliability of the fixing device, and avoid affecting the stable operation of the hydraulic pump.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the hydraulic system includes a fixing device and a hydraulic pump 2. The fixing device includes a housing 1. The hydraulic pump 2 is connected to the housing 1.

[0055] In some embodiments, the hydraulic pump 2 is detachably connected to the housing 1. Specifically, the hydraulic pump 2 is detachably connected to the housing 1 by bolts and nuts. The bolt and nut connection makes it easy to assemble and disassemble the hydraulic pump 2, and the connection is secure.

[0056] Of course, in other embodiments, the hydraulic pump 2 can also be connected to the housing 1 by welding.

[0057] In some embodiments, the housing 1 has a first flow channel 12 and a mounting hole 11 communicating with the first flow channel 12. The hydraulic pump 2 has an oil suction pipe 21. After the hydraulic pump 2 is fixed to the housing 1, the oil suction pipe 21 is located inside the mounting hole 11. The oil suction pipe 21 has a second flow channel 211. The first flow channel 12 communicates with the second flow channel 211, and oil can flow into the second flow channel 211 through the first flow channel 12.

[0058] In some embodiments, the mounting hole 11 is a circular hole. Of course, in other embodiments, the mounting hole 11 may also be an elliptical hole.

[0059] In some embodiments, the fixing device further includes a vibration isolation bushing 4. The vibration isolation bushing 4 is located within the mounting hole 11. The vibration isolation bushing 4 is sleeved on the oil suction pipe 21. By providing the vibration isolation bushing 4, the force and vibration of alternating loads can be absorbed, improving the reliability of the fixing device and avoiding affecting the stable operation of the hydraulic pump 2.

[0060] like Figure 3 As shown, in some embodiments, the vibration isolation bushing 4 includes an inner support ring 41, a vibration isolation ring 42, and an outer support ring 43. The vibration isolation ring 42 is sleeved on and connected to the inner support ring 41. The outer support ring 43 is sleeved on and connected to the vibration isolation ring 42. The inner support ring 41 is used to transmit loads. The vibration isolation ring 42 is used to absorb the force and vibration of alternating loads. The outer support ring 43 is used to cooperate with the housing 1.

[0061] Specifically, the vibration isolation ring 42 is firmly bonded to the inner support ring 41 and the outer support ring 43 through a vulcanization process to ensure that interlayer slippage or separation does not occur when subjected to vibration or load.

[0062] In some embodiments, the inner support ring 41 is a rigid structure. Specifically, the inner support ring 41 is made of steel. For example, the inner support ring 41 is made of 45# steel. Of course, in other embodiments, the inner support ring 41 can also be made of aluminum alloy.

[0063] In some embodiments, the vibration isolation ring 42 is an elastic structure. Specifically, the vibration isolation ring 42 is made of rubber. Of course, in other embodiments, the vibration isolation ring 42 may also be made of silicone or fluoropolymer.

[0064] In some embodiments, the outer support ring 43 is a rigid structure. Specifically, the outer support ring 43 is made of steel. For example, the outer support ring 43 is made of 45# steel. Of course, in other embodiments, the outer support ring 43 can be made of aluminum alloy.

[0065] In some embodiments, the length of the vibration isolation ring 42 along its own axial direction is less than the length of the inner support ring 41 along its own axial direction.

[0066] In some embodiments, the length of the outer support ring 43 along its own axial direction is equal to the length of the vibration isolation ring 42 along its own axial direction.

[0067] In some embodiments, the inner support ring 41 has a circular cross-sectional shape along its own axial direction. Of course, in other embodiments, the inner support ring 41 may also have an elliptical cross-sectional shape along its own axial direction.

[0068] In some embodiments, the cross-sectional shape of the vibration isolation ring 42 along its own axial direction is circular. Of course, in other embodiments, the cross-sectional shape of the vibration isolation ring 42 along its own axial direction may also be elliptical.

[0069] In some embodiments, the outer support ring 43 has a circular cross-sectional shape along its own axial direction. Of course, in other embodiments, the outer support ring 43 may also have an elliptical cross-sectional shape along its own axial direction.

[0070] In some embodiments, the thickness of the vibration isolation ring 42 along its own radial direction is greater than the thickness of the inner support ring 41 along its own radial direction. The thickness of the vibration isolation ring 42 along its own radial direction is greater than the thickness of the outer support ring 43 along its own radial direction. This allows the vibration isolation bushing 4 to have a better ability to absorb the force and vibration of alternating loads.

[0071] In some embodiments, the inner wall of the vibration isolation bushing 4 transitions into the outer wall of the oil suction pipe 21. The outer wall of the vibration isolation bushing 4 has a clearance fit with the inner wall of the housing 1 defining the mounting hole 11. The transition fit between the inner wall of the vibration isolation bushing 4 and the outer wall of the oil suction pipe 21 makes the connection between the vibration isolation bushing 4 and the oil suction pipe 21 tighter. The clearance fit between the outer wall of the vibration isolation bushing 4 and the inner wall of the housing 1 defining the mounting hole 11 facilitates the installation of the vibration isolation bushing 4 within the mounting hole 11.

[0072] In some embodiments, the housing 1 has an opening that communicates with the mounting hole 11. An oil suction plug is located in the mounting hole 11 and blocks the opening.

[0073] In some embodiments, the oil suction plug 5 is detachably connected to the housing 1. Specifically, the oil suction plug 5 is threadedly connected to the housing 1.

[0074] like Figure 4 and Figure 5 As shown, in some embodiments, the oil suction plug 5 has an inlet 53. The inlet 53 communicates with the interior of the oil suction plug 5. The inlet 53 communicates with the first flow channel 12. Oil can pass through the first flow channel 12, through the inlet 53, and enter the interior of the oil suction plug 5.

[0075] In some embodiments, the oil suction plug 5 has a first sealing groove 51. The fixing device also includes a first sealing ring 6. The first sealing ring 6 is located in the first sealing groove 51. The first sealing ring 6 is used to achieve a seal between the outer wall of the oil suction plug 5 and the inner wall of the housing 1 defining the mounting hole 11. By providing the first sealing ring 6, oil is prevented from entering the area where the vibration isolation bushing 4 is located.

[0076] In some embodiments, the first sealing ring 6 is a circular annular structure. Of course, in other embodiments, the first sealing ring 6 may also be an elliptical annular structure.

[0077] In some embodiments, the oil suction plug 5 has a second sealing groove 52. The second sealing groove 52 is spaced apart from the first sealing groove 51. The fixing device also includes a third sealing ring 8. The third sealing ring 8 is located in the second sealing groove 52. The third sealing ring 8 is used to achieve a seal between the oil suction plug 5 and the inner wall of the housing 1 defining the mounting hole 11. By providing the third sealing ring 8, oil is prevented from flowing out of the mounting hole 11 from the opening.

[0078] In some embodiments, the third sealing ring 8 is a circular annular structure. Of course, in other embodiments, the third sealing ring 8 may also be an elliptical annular structure.

[0079] Specifically, the first sealing groove 51 is located at one end of the oil suction plug 5. The second sealing groove 52 is located at the other end of the oil suction plug 5. The inlet 53 is located between the first sealing groove 51 and the second sealing groove 52.

[0080] like Figure 6 As shown, in some embodiments, the fixing device further includes an oil replenishment conduit 3. The first flow channel 12 is connected to the second flow channel 211 via the oil replenishment conduit 3.

[0081] Specifically, the oil suction pipe 21 has a countersunk hole, which forms a second flow channel 211. One end of the oil replenishment conduit 3 is connected to the inner wall of the oil suction pipe 21 that defines the countersunk hole.

[0082] Specifically, the oil suction plug 5 has a connecting hole 54, which communicates with the interior of the oil suction plug 5. The other end of the oil replenishment conduit 3 is connected to the connecting hole 54.

[0083] In some embodiments, one end of the oil replenishment conduit 3 is inserted into the connection hole 54 to connect one end of the oil replenishment conduit 3 to the oil suction plug 5.

[0084] During use, the oil enters the interior of the oil suction plug 5 from the first flow channel 12 through the inlet 53, then flows into the oil replenishment pipe 3 from the interior of the oil suction plug 5, and then flows into the second flow channel 211 from the oil replenishment pipe 3.

[0085] In some embodiments, the cross-sectional shape of the oil replenishment conduit 3 along its own axial direction is annular. Of course, in other embodiments, the cross-sectional shape of the oil replenishment conduit 3 along its own axial direction may also be elliptical.

[0086] In some embodiments, the oil replenishment conduit 3 has a third sealing groove 31. The fixing device also includes a second sealing ring 7. The second sealing ring 7 is located in the third sealing groove 31. The second sealing ring 7 is used to achieve a seal between the oil replenishment conduit 3 and the inner wall of the oil suction pipe 21. By providing the second sealing ring 7, oil is prevented from flowing to the outside of the oil suction pipe 21.

[0087] In some embodiments, the second sealing ring 7 is a circular annular structure. Of course, in other embodiments, the second sealing ring 7 may also be an elliptical annular structure.

[0088] In some embodiments, the oil replenishment conduit 3 has a fourth sealing groove 32. The fourth sealing groove 32 is spaced apart from the third sealing groove 31. The fixing device also includes a fourth sealing ring 9. The fourth sealing ring 9 is located in the fourth sealing groove 32. The fourth sealing ring 9 is used to achieve a seal between the outer wall of the oil replenishment conduit 3 and the inner wall of the oil suction plug 5. By providing the fourth sealing ring 9, oil is prevented from flowing to the outside of the oil replenishment conduit 3.

[0089] In some embodiments, the fourth sealing ring 9 is a circular annular structure. Of course, in other embodiments, the fourth sealing ring 9 may also be an elliptical annular structure.

[0090] Specifically, the third sealing groove 31 is located on the portion of the oil replenishment conduit 3 near one end. The fourth sealing groove 32 is located on the portion of the oil replenishment conduit 3 near the other end.

[0091] In some embodiments, the housing 1 has an unloading slot 13. The unloading slot 13 corresponds to the vibration isolation bushing 4. Specifically, the unloading slot 13 is located on the inner wall forming the mounting hole 11. By providing the unloading slot 13, when the vibration isolation bushing 4 is damaged, oil can flow out through the unloading slot 13, which protects the hydraulic pump 2 and prevents damage to the hydraulic pump 2.

[0092] During installation, first connect the hydraulic pump 2 to the housing 1. Position the oil suction pipe 21 in the mounting hole 11. Place the vibration isolation bushing 4 onto the oil suction pipe 21. Place the oil replenishment pipe 2 into the countersunk hole. Then connect the oil suction plug 5 to the housing 1.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fixture, characterized in that include: A housing (1) having a first flow channel (12) and a mounting hole (11) communicating with the first flow channel (12), the housing (1) being used to fix a hydraulic pump (2) having an oil suction pipe (21) located in the mounting hole (11), the oil suction pipe (21) having a second flow channel (211); Oil replenishment conduit (3), the first flow channel (12) is connected to the second flow channel (211) through the oil replenishment conduit (3); and Vibration isolation bushing (4); the vibration isolation bushing (4) is located inside the mounting hole (11) and is sleeved on the oil suction pipe (21).

2. The fixture of claim 1, wherein The vibration isolation bushing (4) includes: Inner support ring (41); A vibration isolation ring (42), which is sleeved on and connected to the inner support ring (41), wherein the vibration isolation ring (42) is an elastic structure; and An outer support ring (43) is sleeved on the vibration isolation ring (42) and connected to the vibration isolation ring (42).

3. The fixture of claim 1, wherein The inner wall of the vibration isolation bushing (4) is transitionally fitted with the outer wall of the oil suction pipe (21), and the outer wall of the vibration isolation bushing (4) is clearance fitted with the inner wall of the housing (1) that defines the mounting hole (11).

4. The fixture of claim 1, wherein It also includes an oil suction plug (5), which is located in the mounting hole (11). The first flow channel (12) is connected to the interior of the oil suction plug (5), and the oil replenishment conduit (3) is connected to the interior of the oil suction plug (5). One end of the oil suction plug (5) located in the mounting hole (11) abuts against the vibration isolation bushing (4).

5. The fixture of claim 4, wherein It also includes a first sealing ring (6), which is located between the oil suction plug (5) and the inner wall of the housing (1) defining the mounting hole (11). The first sealing ring (6) seals the outer wall of the oil suction plug (5) and the inner wall of the housing (1) defining the mounting hole (11).

6. The fixture of claim 5, wherein The oil suction plug (5) has a first sealing groove (51), and the first sealing ring (6) is located in the first sealing groove (51).

7. The fixture of claim 1, wherein The oil suction pipe (21) has a countersunk hole, which forms the second flow channel (211), and one end of the oil replenishment conduit (3) is connected to the inner wall of the oil suction pipe (21) that defines the countersunk hole.

8. The fixture of claim 7, wherein It also includes a second sealing ring (7), which is located between the oil replenishment conduit (3) and the inner wall of the oil suction pipe (21) that defines the countersunk hole. The second sealing ring (7) seals the outer wall of the oil replenishment conduit (3) and the inner wall of the oil suction pipe (21) that defines the countersunk hole.

9. The fixture of claim 1, wherein The housing (1) has an unloading slot (13) which corresponds to the vibration isolation bushing (4).

10. A hydraulic system characterized by, include: The fixing device as described in any one of claims 1-9; as well as A hydraulic pump (2) is connected to the housing (1).

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