A hydraulic pump having a capsule pump mechanism

Abstract

This utility model discloses a hydraulic pump with a capsule-type pumping mechanism, relating to the field of hydraulic pump technology. The utility model includes a housing, with a fixing plate fixedly connected to the front side of the housing via a second bolt. A capsule push-pull plate is movably connected to the rear side of the fixing plate via a guide rod. This utility model drives the capsule push-pull plate to move back and forth via a drive shaft, reciprocatingly pushing and pulling the pumping capsule. This allows liquid to be drawn into the pumping capsule from the inlet branch pipe and pumped out from the outlet branch pipe. The structure is simpler and easier to assemble and process. The ball bearings convert the sliding friction between the capsule push-pull plate and the pumping mechanism into rolling friction, reducing resistance and wear between the plates. The roller sleeves convert the sliding friction between the connecting column and the T-shaped connecting bracket into rolling friction, further reducing resistance and wear and extending the service life of the hydraulic pump.

Description

Technical Field

[0001] This utility model belongs to the technical field, and in particular relates to a hydraulic pump with a capsule-type pump mechanism. Background Technology

[0002] A hydraulic pump is a power component of a hydraulic system. It is driven by an engine or electric motor, drawing oil from a hydraulic tank, pressurizing it, and then discharging it to the actuator. A search revealed a patent with application number 202020813724.9, which discloses a hydraulic pump with a capsule-type pumping mechanism. The pump comprises a top shell, a bottom shell, a swashplate, and a pumping mechanism. The swashplate is positioned on the top surface of the bottom shell, and the top shell is mounted on the bottom shell, forming a working chamber. The pumping mechanism is located within the working chamber. The pumping mechanism is characterized by being a capsule-type mechanism, comprising a main shaft, a hydraulic cylinder, a turntable, a pumping unit positioning plate, and at least one pumping unit. The main shaft passes through the bottom shell and the swashplate from bottom to top and inserts into the working chamber. The pumping unit is positioned on the pumping unit positioning plate. The turntable, pumping unit positioning plate, and hydraulic cylinder are assembled sequentially from top to bottom and are rotatably mounted on the main shaft. The pumping unit includes a compression ball, a piston-type pusher, and a retractable multi-chamber capsule.

[0003] However, during actual use, the applicant found that the capsule-type pumping mechanism in its hydraulic pump, which includes a main shaft, hydraulic cylinder, turntable, pumping unit positioning plate and six pumping units, and the pumping unit includes a squeezing ball, a piston-type pusher and a retractable multi-chamber capsule, makes the entire hydraulic pump have many parts and a complex structure, which is not convenient for assembly and processing. In view of this, we propose a hydraulic pump with a capsule-type pumping mechanism. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a hydraulic pump with a capsule-type pumping mechanism, comprising a housing. A fixing plate is fixedly connected to the front side of the housing via a second bolt. A capsule push-pull plate is movably connected to the rear side of the fixing plate via a guide rod. A ball bearing is provided at the connection between the capsule push-pull plate and the guide rod. A pumping capsule is fixedly connected between the fixing plate and the capsule push-pull plate. An inlet branch pipe and an outlet branch pipe are fixedly provided on the front side of the pumping capsule. The front end of the inlet branch pipe passes through the fixing plate and the front side wall of the housing and is fitted with an inlet one-way valve. The front side of the liquid outlet branch pipe passes through the fixed plate and the front side wall of the shell in sequence and is fitted with a liquid outlet one-way valve. The rear side of the capsule push-pull plate is fixedly connected to a T-shaped connecting bracket, and a connecting groove is opened on the rear side of the T-shaped connecting bracket. One side of the shell is rotatably connected to a main shaft through a bearing. One end of the main shaft located inside the shell is fitted with a turntable. The side of the turntable near the T-shaped connecting bracket is fixedly connected to a connecting column that cooperates with the connecting groove. A roller sleeve is fitted on the connecting column. The rear side of the shell is fixedly connected to an end cap by a first bolt.

[0006] Preferably, guide holes for the guide rod to pass through are provided at the four corner positions of the capsule push-pull plate.

[0007] Preferably, the balls are disposed on the side wall of the guide hole, and a plurality of balls are arranged in a circular array on the side wall of the guide hole, and the balls roll along the outer wall of the guide rod.

[0008] Preferably, the roller sleeve is movably sleeved on the connecting column via a bearing, and the diameter of the roller sleeve is smaller than the width of the connecting groove.

[0009] Preferably, four guide rods are provided, and the front ends of the four guide rods are respectively fixedly connected to the four corner positions on the rear side of the fixed plate.

[0010] Preferably, the rear ends of both the inlet branch pipe and the outlet branch pipe are connected to the interior of the pump capsule.

[0011] This utility model has the following beneficial effects:

[0012] This utility model discloses a hydraulic pump with a capsule-type pumping mechanism. By driving the main shaft to move the capsule push-pull plate back and forth, the pumping capsule is pushed and pulled back and forth, allowing liquid to be drawn into the pumping capsule from the inlet branch pipe and pumped out from the pumping capsule from the outlet branch pipe. The structure is simpler and easier to assemble and process. The ball bearings can convert the sliding friction between the capsule push-pull plate and the pumping capsule into rolling friction, reducing the resistance and wear between the capsule push-pull plate and the pumping capsule. The roller sleeves can convert the sliding friction between the connecting column and the T-shaped connecting bracket into rolling friction, reducing the resistance and wear between the connecting column and the T-shaped connecting bracket, and extending the service life of the hydraulic pump. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the external structure of a hydraulic pump with a capsule-type pumping mechanism according to the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of a hydraulic pump with a capsule-type pumping mechanism according to the present invention.

[0016] Figure 3 This utility model relates to a hydraulic pump with a capsule-type pumping mechanism. Figure 2 Enlarged view of the structure at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the capsule push-pull plate and T-shaped connecting bracket in a capsule-type pumping mechanism of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Housing; 2. End cap; 3. First bolt; 4. Inlet branch pipe; 41. Inlet check valve; 5. Outlet branch pipe; 51. Outlet check valve; 6. Second bolt; 7. Fixing plate; 71. Guide rod; 8. Pump bladder; 9. Bladder push-pull plate; 91. Guide hole; 92. Ball bearing; 10. Main shaft; 11. Turntable; 12. Connecting column; 121. Roller sleeve; 13. T-shaped connecting bracket; 131. Connecting groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 As shown, this utility model provides a technical solution:

[0022] A hydraulic pump with a capsule-type pumping mechanism includes a housing 1. A fixing plate 7 is fixedly connected to the front side of the housing 1 via a second bolt 6. A capsule push-pull plate 9 is movably connected to the rear side of the fixing plate 7 via guide rods 71. Four guide rods 71 ​​are provided, and the front ends of the four guide rods 71 ​​are respectively fixedly connected to the four corner positions on the rear side of the fixing plate 7. A pumping capsule 8 is fixedly connected between the fixing plate 7 and the capsule push-pull plate 9. The pumping capsule 8 is made of fluororubber material with fatigue resistance and corrosion resistance. The pump capsule 8 has a hollow, expandable bladder-like structure with a corrugated exterior suitable for expansion and contraction. It can store and expel liquid. An inlet branch pipe 4 and an outlet branch pipe 5 are fixedly installed on the front side of the pump capsule 8. The rear ends of both the inlet and outlet branch pipes 4 and 5 communicate with the interior of the pump capsule 8. The front end of the inlet branch pipe 4 passes through the fixing plate 7 and the front side wall of the housing 1, and is fitted with an inlet one-way valve 41. This allows liquid to enter the pump capsule 8 through the inlet branch pipe 4, while preventing liquid from exiting the pump capsule 8 through the inlet. Liquid flows out through branch pipe 4. The front side of branch pipe 5 passes through fixed plate 7 and the front wall of housing 1, and is fitted with a one-way valve 51. This allows liquid inside pump capsule 8 to flow out through branch pipe 5, while preventing external liquid from flowing into pump capsule 8. A T-shaped connecting bracket 13 is fixedly connected to the rear side of capsule push-pull plate 9, and a connecting groove 131 is provided on the rear side of the T-shaped connecting bracket 13. A main shaft 10 is rotatably connected to one side of housing 1 via a bearing. The main shaft 10 is located within the housing. One end of the housing 1 is fitted with a turntable 11. The turntable 11 is fixedly connected to a connecting column 12 that mates with the connecting groove 131 on the side near the T-shaped connecting bracket 13. The rear side of the housing 1 is fixedly connected to an end cap 2 by a first bolt 3. The main shaft 10 drives the capsule push-pull plate 9 to move back and forth, and pushes and pulls the pumping capsule 8 back and forth. This allows the liquid to be drawn into the pumping capsule 8 from the inlet branch pipe 4 and pumped out from the outlet branch pipe 5. The structure is simpler and easier to assemble and process.

[0023] A ball bearing 92 is provided at the connection between the capsule push-pull plate 9 and the guide rod 71. Guide holes 91 for the guide rod 71 are provided at each of the four corners of the capsule push-pull plate 9. The ball bearings 92 are disposed on the sidewalls of the guide holes 91, and several ball bearings 92 are arranged in a circular array on the sidewalls of the guide holes 91. The ball bearings 92 roll along the outer wall of the guide rod 71. The arrangement of the ball bearings 92 is to convert the sliding friction between the capsule push-pull plate 9 and the guide rod 71 into rolling friction, reducing the friction between the capsule push-pull plate 9 and the guide rod 71. To reduce resistance and wear between the connecting column 12 and the T-shaped connecting bracket 13, a roller sleeve 121 is fitted onto the connecting column 12. The roller sleeve 121 is movably fitted onto the connecting column 12 via a bearing. The diameter of the roller sleeve 121 is smaller than the width of the connecting groove 131, allowing the roller sleeve 121 to roll along the side wall of the connecting groove 131. Through the roller sleeve 121, the sliding friction between the connecting column 12 and the T-shaped connecting bracket 13 can be converted into rolling friction, reducing the resistance and wear between the connecting column 12 and the T-shaped connecting bracket 13, and extending the service life of the hydraulic pump.

[0024] Working principle: During use, the drive spindle 10 rotates, causing the turntable 11 to rotate. The rotation of the turntable 11 causes the connecting column 12 to rotate around the spindle 10. At this time, the connecting column 12 can cause the roller sleeve 121 to roll along the side wall of the connecting groove 131, which in turn can cause the T-shaped connecting bracket 13 to move back and forth. The movement of the T-shaped connecting bracket 13 can cause the capsule push-pull plate 9 to move back and forth along the guide rod 71. During the movement of the capsule push-pull plate 9, the ball 92 can roll along the guide rod 71 and can reciprocate to push and stretch the pumping capsule 8, so that the external liquid can be drawn into the interior of the pumping capsule 8 through the inlet branch pipe 4 and the liquid inside the pumping capsule 8 can be pumped out through the outlet branch pipe 5.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A hydraulic pump with a capsule-type pumping mechanism, comprising a housing (1), characterized in that: A fixing plate (7) is fixedly connected to the front side of the housing (1) by a second bolt (6). A capsule push-pull plate (9) is movably connected to the rear side of the fixing plate (7) by a guide rod (71). A ball bearing (92) is provided at the connection between the capsule push-pull plate (9) and the guide rod (71). A pump capsule (8) is fixedly connected between the fixing plate (7) and the capsule push-pull plate (9). An inlet branch pipe (4) and an outlet branch pipe (5) are fixedly provided on the front side of the pump capsule (8). The front end of the inlet branch pipe (4) passes through the fixing plate (7) and the front side wall of the housing (1) in sequence and is fitted with an inlet check valve (41). The front end of the outlet branch pipe (5) passes through the fixing plate (7) and the housing in sequence. (1) The front side wall is fitted with a liquid outlet check valve (51). The rear side of the capsule push-pull plate (9) is fixedly connected with a T-shaped connecting bracket (13), and a connecting groove (131) is opened on the rear side of the T-shaped connecting bracket (13). One side of the housing (1) is rotatably connected to a main shaft (10) through a bearing. One end of the main shaft (10) located inside the housing (1) is fitted with a turntable (11). The turntable (11) is fixedly connected to a connecting column (12) that cooperates with the connecting groove (131) on the side near the T-shaped connecting bracket (13). A roller sleeve (121) is fitted on the connecting column (12). The rear side of the housing (1) is fixedly connected with an end cap (2) through a first bolt (3).

2. A hydraulic pump with a capsule-type pumping mechanism according to claim 1, characterized in that, The capsule push-pull plate (9) has guide holes (91) at each of its four corners for the guide rod (71) to pass through.

3. A hydraulic pump with a capsule-type pumping mechanism according to claim 2, characterized in that, The ball bearings (92) are disposed on the side wall of the guide hole (91), and a plurality of the ball bearings (92) on the side wall of the guide hole (91) are arranged in a circular array. The ball bearings (92) roll along the outer wall of the guide rod (71).

4. A hydraulic pump with a capsule-type pumping mechanism according to claim 1, characterized in that, The roller sleeve (121) is movably sleeved on the connecting column (12) via a bearing, and the diameter of the roller sleeve (121) is smaller than the groove width of the connecting groove (131).

5. A hydraulic pump with a capsule-type pumping mechanism according to claim 1, characterized in that, The guide rod (71) is provided in four parts, and the front ends of the four guide rods (71) are respectively fixedly connected to the four corner positions on the rear side of the fixing plate (7).

6. A hydraulic pump with a capsule-type pumping mechanism according to claim 1, characterized in that, The rear ends of both the inlet branch pipe (4) and the outlet branch pipe (5) are connected to the interior of the pump capsule (8).

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