A hydraulic pump oil suction pipe connection structure

Abstract

The present invention discloses a hydraulic pump suction pipe connection structure, including a fixed seat, the fixed seat is fixedly connected to the outer side of the hydraulic pump suction port, the middle part of the fixed seat is provided with an oil inlet hole aligned with and connected to the hydraulic pump suction port, the surface of the fixed seat is fixedly connected with a support block, the support block is fixedly connected with a limit rod, and the end of the fixed seat away from the support block is provided with a first slot; the hydraulic pump suction pipe connection structure also includes a connection frame with one side attached to the surface of the fixed seat, and the other side of the connection frame is connected to the suction pipe, the connection frame is provided with a limit hole, the limit rod and the limit hole are plugged and matched, the end of the limit rod away from the support block is provided with an external thread, the external thread is connected with a screw sleeve, and the lower end of the screw sleeve is attached to the connection frame; the upper end of the connection frame is connected with a U-shaped plug rod, and the other end of the U-shaped plug rod is plugged into the first slot. The invention has the advantages of simultaneously meeting the firmness of the connection and the convenience of disassembly and assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline connection, and in particular relates to a hydraulic pump oil suction pipe connection structure. Background Art

[0002] The connection structure of the hydraulic pump suction pipe is a crucial part of the hydraulic system, which ensures that the hydraulic pump can stably and efficiently suck in hydraulic oil. In the hydraulic system, the connection structure of the hydraulic pump suction pipe usually includes the oil inlet hole on the pump body, the fixing seat, the connecting sleeve, the suction pipe and the related sealing elements and fasteners.

[0003] The oil inlet on the pump body is the key channel for hydraulic oil to enter the hydraulic pump. A fixed seat is usually set on the outer ring of the oil inlet, which is fixed to the oil inlet as a whole. The connecting sleeve is the key component connecting the oil inlet and the oil suction pipe. One end of it is inserted into the oil inlet, and a reliable sealing connection is formed with the oil inlet through a sealing element; the other end is connected to the oil suction pipe by threads or other means. In order to enhance the sealing performance of the connection, various sealing elements, such as O-rings, copper washers, etc., are also used in the connection structure of the hydraulic pump suction pipe. These sealing elements fit tightly with the connection parts through extrusion, deformation, etc., forming an effective sealing barrier to prevent the leakage of hydraulic oil. In addition, fasteners, such as bolts and nuts, are also used in the connection structure of the hydraulic pump suction pipe. These fasteners firmly fix the connection parts together by tightening, etc., to ensure the stability and reliability of the connection.

[0004] In the above-mentioned connection structure, the firmness of the connection and the convenience of disassembly and assembly are contradictory. The firmness of the connection can be improved by tightening the bolts, but the convenience of disassembly and assembly is reduced, and vice versa. If the working environment is harsh, such as there is a lot of dust and impurities, or the oil contains a lot of pollutants, the suction pipe may be worn or blocked more quickly, and more frequent inspections and replacements are required. In addition, if the hydraulic pump works at a high load for a long time, it will also cause certain wear on the suction pipe, increasing the need for replacement. Therefore, there is an urgent need for a hydraulic pump suction pipe connection structure that satisfies both the firmness of the connection and the convenience of disassembly and assembly. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a hydraulic pump suction pipe connection structure, which has the advantages of satisfying both the firmness of the connection and the convenience of disassembly and assembly, thereby solving the problems of the prior art.

[0006] The present invention is implemented as follows: a hydraulic pump suction pipe connection structure includes a fixed seat, the fixed seat is fixedly connected to the outer side of the hydraulic pump suction port, the middle part of the fixed seat is provided with an oil inlet hole aligned with and connected to the hydraulic pump suction port, the surface of the fixed seat is fixedly connected with a support block, the support block is fixedly connected with a limiting rod, and a first slot is provided at the end of the fixed seat away from the support block; the hydraulic pump suction pipe connection structure also includes a connecting frame with one side attached to the surface of the fixed seat, and the other side of the connecting frame is connected to the oil suction pipe, a limiting hole is provided on the connecting frame, the limiting rod and the limiting hole are plugged in and matched, the end of the limiting rod away from the support block is provided with an external thread, a screw sleeve is connected to the external thread, and the lower end of the screw sleeve is attached to the connecting frame; the upper end of the connecting frame is connected with a U-shaped plug rod, and the other end of the U-shaped plug rod is plugged into the first slot.

[0007] As a preferred embodiment of the present invention, the support block is welded to the surface of the fixed seat and is located at the lower side of the oil inlet hole; the limit rod is a straight rod, and the limit rod is parallel to the fixed seat, and two limit rods are provided, and the two limit rods are vertically arranged on the upper surface of the support block and are respectively located on both sides of the oil inlet hole.

[0008] As a preferred embodiment of the present invention, a ring groove is formed on the surface of the fixing seat, the ring groove surrounds the oil inlet hole, a sealing ring is arranged in the ring groove, and the sealing ring is attached to the connecting frame and the side wall of the ring groove.

[0009] As a preferred embodiment of the present invention, the first slot is connected to the annular groove, a pushing piece is provided in the first slot and the annular groove, and one side surface of the sealing ring is in contact with the pushing piece, and the other side surface is in contact with the surface of the connecting frame; one end of the U-shaped insertion rod inserted into the first slot is provided with a first chamfer, and when the end of the U-shaped insertion rod is inserted into the first slot, the U-shaped insertion rod pushes the pushing piece to move toward one side of the connecting frame and presses and fixes the sealing ring.

[0010] As a preferred embodiment of the present invention, the pushing member is configured as a first push ring, one side of the first push ring is in contact with the sealing ring, the first push ring is located in the ring groove, and the first push ring extends into the first slot.

[0011] As a preferred embodiment of the present invention, the pushing member includes a second push ring and a pressure rod, the second push ring is located in the ring groove, the pressure rod has two and is respectively fixedly connected to the left and right sides of the second push ring, and the pressure rod is located in the first slot.

[0012] As a preferred embodiment of the present invention, the end of the U-shaped rod is a step-shaped structure, the step-shaped structure has a plurality of step surfaces, and a second chamfer is provided between adjacent step surfaces; a second slot is provided on the upper side of the connecting frame, and the U-shaped rod is slidably inserted in the second slot; an installation slot is provided on the upper side of the connecting frame, and an electric pressure rod is installed in the installation slot, and the telescopic end of the electric pressure rod extends to the outside of the installation slot, and the telescopic end of the electric pressure rod is fixedly connected to a connecting rod, and the two ends of the connecting rod are respectively fixedly connected to the two U-shaped rods.

[0013] As a preferred embodiment of the present invention, a sealed air cavity is provided inside the sealing ring; a pressure sensor is provided between the sealing ring and the pushing member, the pressure sensor is a wireless pressure sensor, and a signal is connected to the control end of the electric pressure rod.

[0014] As a preferred embodiment of the present invention, a notch is provided at the lower side of the connecting frame, and a spring is sleeved on the limiting rod. When the spring is compressed, the spring is located in the notch.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, the fixing seat carries the limiting rod through the support block, the limiting rod carries the connecting frame, and the connecting frame is connected to the first slot of the fixing seat through the U-shaped plug rod. Through this scheme, a mutually supporting connecting structure is formed, which is convenient for installing and disassembling the connecting frame on the one hand, and can bear greater pressure on the other hand, making the connection more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the hydraulic pump oil suction pipe connection structure and the hydraulic pump provided in Example 1 of the present invention;

[0018] Figure 2 is a structural schematic diagram of a hydraulic pump oil suction pipe connection structure provided in Example 1 of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall explosion structure of the hydraulic pump oil suction pipe connection structure and the hydraulic pump provided in Example 1 of the present invention;

[0020] Figure 4 The embodiment 1 of the present invention provides Figure 3 A schematic diagram of the enlarged structure of part A;

[0021] Figure 5 The structure of the pusher provided in Example 1 of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 6 The structure of the pusher provided in Example 1 of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 7 It is a schematic diagram of the overall explosion structure of the hydraulic pump oil suction pipe connection structure and the hydraulic pump provided in Example 2 of the present invention;

[0024] Figure 8 Embodiment 2 of the present invention provides Figure 7 A schematic diagram of the enlarged structure of part B;

[0025] Fig. 9 is a structural schematic diagram of a U-shaped plug provided in Example 2 of the present invention being arranged in a stepped structure;

[0026] Fig.10 is a schematic cross-sectional structural diagram of a pusher and a sealing ring provided in Example 2 of the present invention;

[0027] Fig.11 Embodiment 2 of the present invention provides Fig.10 Schematic diagram of the enlarged structure of part C.

[0028] In the figure: 1. fixing seat; 2. oil inlet hole; 3. supporting block; 4. limiting rod; 5. first slot; 6. connecting frame; 7. limiting hole; 8. external thread; 9. screw sleeve; 10. U-shaped plug rod; 101. step surface; 102. second chamfer; 11. ring groove; 12. sealing ring; 13. pushing member; 131. first push ring; 132. second push ring; 133. pressure rod; 14. first chamfer; 15. second slot; 16. mounting groove; 17. electric pressure rod; 18. connecting rod; 19. air cavity; 20. pressure sensor; 21. notch; 22. spring. DETAILED DESCRIPTION

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0030] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0031] See also Figure 1-Figure 6 A hydraulic pump oil suction pipe connection structure provided by an embodiment of the present invention includes a fixed seat 1, which is fixedly connected to the outer side of the hydraulic pump oil suction port, and an oil inlet hole 2 aligned with and connected to the hydraulic pump oil suction port is provided in the middle of the fixed seat 1. A support block 3 is fixedly connected to the surface of the fixed seat 1, and a limiting rod 4 is fixedly connected to the support block 3. A first slot 5 is opened at the end of one side of the fixed seat 1 away from the support block 3.

[0032] The hydraulic pump oil suction pipe connection structure also includes a connection frame 6, one side of which is attached to the surface of the fixing seat 1, and the other side of the connection frame 6 is connected to the oil suction pipe, a limiting hole 7 is provided on the connection frame 6, the limiting rod 4 and the limiting hole 7 are plugged together, and the end of the limiting rod 4 away from the support block 3 is provided with an external thread 8, and a threaded sleeve 9 is connected to the external thread 8, and the lower end of the threaded sleeve 9 is attached to the connection frame 6; the upper end of the connection frame 6 is connected to a U-shaped plug rod 10, and the other end of the U-shaped plug rod 10 is plugged into the first slot 5.

[0033] In the above arrangement, the fixing seat 1 can be an integrated structure with the hydraulic pump, or can be connected to the hydraulic pump by welding. When installing the hydraulic pump suction pipe connection structure, the limiting hole 7 of the connection frame 6 is sleeved on the limiting rod 4, at which time one side surface of the connection frame 6 is attached to the surface of the fixing seat 1, and then the connection frame 6 is pushed to a position aligned with the oil inlet hole 2, and before alignment, the end of the U-shaped plug rod 10 is inserted into the first slot 5. Finally, the screw sleeve 9 is screwed onto the external thread 8 so that the end of the screw sleeve 9 presses the connection frame 6 tightly.

[0034] With this arrangement, the fixing seat 1 carries the limiting rod 4 through the supporting block 3, the limiting rod 4 carries the connecting frame 6, and the connecting frame 6 is connected to the first slot 5 of the fixing seat 1 through the U-shaped inserting rod 10. With this solution, a mutually supporting connecting structure is formed, which is convenient for installing and disassembling the connecting frame 6 on the one hand, and can bear greater pressure on the other hand, making the connection more secure.

[0035] It should be noted that the connection frame 6 can be set to a traditional circular ring shape, or can be set to a rectangular, elliptical or other shape, and the installation flexibility and adaptability are relatively high.

[0036] Specifically, the support block 3 is welded to the surface of the fixing seat 1 and is located at the lower side of the oil inlet hole 2; the limit rod 4 is a straight rod, and the limit rod 4 is parallel to the fixing seat 1, and two limit rods 4 are provided, and the two limit rods 4 are vertically arranged on the upper surface of the support block 3 and are respectively located on both sides of the oil inlet hole 2.

[0037] Furthermore, in one embodiment, the hydraulic pump suction pipe connection structure can be sealed in the following manner: a sealing member can be provided on a side of the connection frame 6 that is attached to the fixing seat 1, and the sealing member is attached to the surface of the fixing seat 1 and surrounds the oil inlet hole 2. Of course, sealing can also be performed in the following manner:

[0038] An annular groove 11 is formed on the surface of the fixing seat 1 . The annular groove 11 surrounds the oil inlet hole 2 . A sealing ring 12 is disposed in the annular groove 11 . The sealing ring 12 is attached to the connecting frame 6 and the side wall of the annular groove 11 .

[0039] Furthermore, the first slot 5 is connected to the annular groove 11, a pushing piece 13 is provided in the first slot 5 and the annular groove 11, and one side surface of the sealing ring 12 is in contact with the pushing piece 13, and the other side surface is in contact with the surface of the connecting frame 6; one end of the U-shaped insertion rod 10 inserted into the first slot 5 is provided with a first chamfer 14, and when the end of the U-shaped insertion rod 10 is inserted into the first slot 5, the U-shaped insertion rod 10 pushes the pushing piece 13 to move toward one side of the connecting frame 6 and presses and fixes the sealing ring 12.

[0040] Because when the connection frame 6 is installed, the connection frame 6 moves in close contact with the surface of the fixing seat 1. If the sealing ring 12 protrudes from the annular groove 11, it will hinder the movement of the connection frame 6. And conversely, the sealing ring 12 will also be squeezed and deformed by the connection frame 6, and even out of the working position. With this setting, when the connection frame 6 is installed, in the process of pushing the connection frame 6, since the U-shaped plug rod 10 is not inserted into the first slot 5, and the pusher 13 is not pressed, the pusher 13 does not squeeze the sealing ring 12 at this time, and the sealing ring 12 is completely located in the annular groove 11, which will not hinder the movement of the connection frame 6, and conversely, the sealing ring 12 will not be pushed and deformed by the connection frame 6. In the second half of the movement of the connection frame 6, the U-shaped plug rod 10 is inserted into the first slot 5, and the U-shaped plug rod 10 can push the pusher 13 to move to one side of the connection frame 6, and then the pusher 13 pushes the sealing ring 12 to protrude from the annular groove 11 and fits tightly to the connection frame 6, thereby achieving the sealing function.

[0041] With this arrangement, on the one hand, under the push of the pusher 13, the sealing ring 12 is tightly fitted to the connection frame 6 and the wall of the annular groove 11, thereby improving the sealing effect. On the other hand, when installing and removing the connection frame 6, the sealing ring 12 will not hinder the connection frame 6, thereby facilitating the installation and removal of the connection frame 6. Moreover, during the installation process, the sealing ring 12 will not be pushed by the connection frame 6 and deformed (or even out of the working position), thereby further improving the sealing effect.

[0042] The pusher 13 may be implemented in any of the following two ways:

[0043] In the first type, the push member 13 is configured as a first push ring 131, one side of the first push ring 131 is attached to the sealing ring 12, the first push ring 131 is located in the annular groove 11, and the first push ring 131 extends into the first slot 5. With this configuration, on the one hand, the first push ring 131 can support the sealing ring 12 (preferably, the two can be fixedly connected); on the other hand, the first push ring 131 can be directly installed in the annular groove 11, or can be directly removed from the annular groove 11, which has a simple and practical structure and helps to reduce costs.

[0044] The second type, the pushing member 13 includes a second push ring 132 and a pressure rod 133, the second push ring 132 is located in the annular groove 11, there are two pressure rods 133, and they are fixedly connected to the left and right sides of the second push ring 132, respectively, and the pressure rod 133 is located in the first slot 5. When in use, the U-shaped insertion rod 10 squeezes the pressure rod 133, and the pressure rod 133 can push the second push ring 132 to press the sealing ring 12.

[0045] In this embodiment, the U-shaped rod 10 can be fixedly connected to the connecting frame 6 .

[0046] See also Figure 1-Figure 11 , which is different from the first embodiment, the U-shaped rod 10 and the connecting frame 6 are not fixedly connected, and the following settings are also performed:

[0047] The end of the U-shaped rod 10 is a step-shaped structure, and the step-shaped structure has a plurality of step surfaces 101, and a second chamfer 102 is provided between adjacent step surfaces 101;

[0048] A second slot 15 is provided on the upper side of the connecting frame 6, and the U-shaped plug 10 is slidably inserted into the second slot 15; a mounting slot 16 is opened on the upper side of the connecting frame 6, and an electric pressure rod 17 is installed in the mounting slot 16, and the telescopic end of the electric pressure rod 17 extends to the outside of the mounting slot 16, and the telescopic end of the electric pressure rod 17 is fixedly connected to a connecting rod 18, and the two ends of the connecting rod 18 are respectively fixedly connected to the two U-shaped plugs 10.

[0049] Through this arrangement, the depth of the U-shaped insertion rod 10 inserted into the first slot 5 can be adjusted. The deeper the insertion, the better the pushing effect on the pushing member 13 and the better the sealing effect. In this way, the sealing level can be adjusted.

[0050] Furthermore, a sealed air cavity 19 is provided inside the sealing ring 12 ; a pressure sensor 20 is provided between the sealing ring 12 and the pushing member 13 , and the pressure sensor 20 is a wireless pressure sensor, and its signal is connected to the control end of the electric pressure rod 17 .

[0051] On the one hand, when the sealing ring 12 is installed, the air cavity 19 is squeezed, which can expand the sealing ring 12, so that the sealing ring 12 and the connecting frame 6 and the annular groove 11 fit more closely, preventing sealing defects caused by wrinkles. On the other hand, if the hydraulic oil leaks, it will squeeze the sealing ring 12. Due to the existence of the air cavity 19, the sealing ring 12 will expand and fit more closely with the connecting frame 6 and the annular groove 11, so that the hydraulic oil cannot pass through the sealing ring 12. A pressure sensor 20 is set between the sealing ring 12 and the pusher 13 to monitor the pressure on the sealing ring 12. On the one hand, it can prevent leakage, and on the other hand, it can adjust the pressure as needed. The signal of the pressure sensor 20 is connected to the electric pressure rod 17. When it is detected that the pressure of the sealing ring 12 is lower than the preset value, the U-shaped plug 10 can be automatically pushed into the first slot 5 by the electric pressure rod 17, thereby increasing the squeezing force on the sealing ring 12.

[0052] Preferably, a notch 21 is provided at the lower side of the connection frame 6, and a spring 22 is sleeved on the limit rod 4. When the spring 22 is compressed, the spring 22 is located in the notch 21. When the connection frame 6 is in the working position, the spring 22 is in a compressed state. When the screw sleeve 9 is unscrewed, the spring 22 pushes the connection frame 6 out, thereby improving the convenience of disassembly.

[0053] Working principle of the present invention:

[0054] When installing the hydraulic pump suction pipe connection structure, the limiting hole 7 of the connection frame 6 is sleeved on the limiting rod 4, at which time one side surface of the connection frame 6 is in contact with the surface of the fixing seat 1, and then the connection frame 6 is pushed to a position aligned with the oil inlet hole 2, and before alignment, the end of the U-shaped plug rod 10 is inserted into the first slot 5. Finally, the screw sleeve 9 is screwed onto the external thread 8 so that the end of the screw sleeve 9 is pressed against the connection frame 6.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pump oil suction pipe connection structure, comprising a fixing seat (1), wherein the fixing seat (1) is fixedly connected to the outer side of the hydraulic pump oil suction port, and an oil inlet hole (2) is provided in the middle of the fixing seat (1) and is aligned with and communicated with the hydraulic pump oil suction port, wherein: A support block (3) is fixedly connected to the surface of the fixing seat (1), a limit rod (4) is fixedly connected to the support block (3), and a first slot (5) is provided at an end of one side of the fixing seat (1) away from the support block (3); The hydraulic pump oil suction pipe connection structure also includes a connection frame (6) with one side attached to the surface of the fixing seat (1), and the other side of the connection frame (6) is connected to the oil suction pipe, a limiting hole (7) is provided on the connection frame (6), the limiting rod (4) and the limiting hole (7) are plugged and matched, and an end of the limiting rod (4) away from the support block (3) is provided with an external thread (8), a screw sleeve (9) is connected to the external thread (8), and the lower end of the screw sleeve (9) is attached to the connection frame (6); The upper end of the connection frame (6) is connected to a U-shaped plug rod (10), and the other end of the U-shaped plug rod (10) is plugged into the first slot (5); The surface of the fixing seat (1) is provided with an annular groove (11), the annular groove (11) surrounds the oil inlet hole (2), a sealing ring (12) is arranged in the annular groove (11), and the sealing ring (12) is attached to the connecting frame (6) and the side wall of the annular groove (11); The first slot (5) is connected to the annular groove (11), a pusher (13) is provided in the first slot (5) and the annular groove (11), and one side surface of the sealing ring (12) is in contact with the pusher (13), and the other side surface is in contact with the surface of the connection frame (6); One end of the U-shaped rod (10) inserted into the first slot (5) is provided with a first chamfer (14); when the end of the U-shaped rod (10) is inserted into the first slot (5), the U-shaped rod (10) pushes the pusher (13) to move toward one side of the connection frame (6) and presses and fixes the sealing ring (12); The pushing member (13) comprises a second pushing ring (132) and a pressing rod (133), the second pushing ring (132) being located in the annular groove (11), the pressing rod (133) having two parts and being fixedly connected to the left and right sides of the second pushing ring (132), respectively, and the pressing rod (133) being located in the first slot (5); The end of the U-shaped insertion rod (10) is a step-shaped structure, the step-shaped structure has a plurality of step surfaces (101), and a second chamfer (102) is provided between adjacent step surfaces (101); A second slot (15) is provided on the upper side of the connection frame (6), and the U-shaped insertion rod (10) is slidably inserted into the second slot (15); a mounting slot (16) is provided on the upper side of the connection frame (6), and an electric pressure rod (17) is installed in the mounting slot (16), and the telescopic end of the electric pressure rod (17) extends to the outside of the mounting slot (16), and the telescopic end of the electric pressure rod (17) is fixedly connected to a connecting rod (18), and the two ends of the connecting rod (18) are respectively fixedly connected to the two U-shaped insertion rods (10).

2. A hydraulic pump oil suction pipe connection structure according to claim 1, characterized in that: The support block (3) is welded to the surface of the fixing seat (1) and is located at the lower side of the oil inlet hole (2); The limiting rod (4) is a straight rod, and the limiting rod (4) is parallel to the fixing seat (1). Two limiting rods (4) are provided, and the two limiting rods (4) are vertically arranged on the upper surface of the supporting block (3) and are respectively located on both sides of the oil inlet hole (2).

3. A hydraulic pump oil suction pipe connection structure as claimed in claim 1, characterized in that: A sealed air cavity (19) is provided inside the sealing ring (12); A pressure sensor (20) is provided between the sealing ring (12) and the pushing member (13); the pressure sensor (20) is a wireless pressure sensor, and its signal is connected to the control end of the electric pressure rod (17).

4. A hydraulic pump oil suction pipe connection structure as claimed in claim 1, characterized in that: A notch (21) is provided on the lower side of the connection frame (6), and a spring (22) is sleeved on the limiting rod (4); when the spring (22) is compressed, the spring (22) is located in the notch (21).

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