Constant-pressure variable displacement piston pump driven by servo motor

Abstract

The utility model provides a servo motor driven constant-pressure variable displacement piston pump which comprises a pump body and a servo motor, and further comprises a connecting part which is located between the pump body and the servo motor and comprises a connecting sleeve. The two ends of the connecting sleeve are provided with a first inserting hole and a second inserting hole respectively, a main shaft of the pump body and a rotating shaft of the servo motor are inserted into the first inserting hole and the second inserting hole respectively, the main shaft is provided with a first alignment hole, the rotating shaft is provided with a second alignment hole, and the connecting component is used for connecting the main shaft of the pump body with the rotating shaft of the servo motor. According to the constant-pressure variable displacement piston pump driven by the servo motor, the pump body and the servo motor are more convenient to disassemble and assemble through the arrangement of the locking component, the pump body and the servo motor can be locked and released at the same time, and therefore the pump body and the servo motor can be locked and released at the same time; and the plunger pump can more quickly adapt to different working environments and production requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, and particularly relates to a servo-motor-driven constant-pressure variable plunger pump. Background Technique

[0002] A constant-pressure variable plunger pump is a hydraulic pump that maintains a constant output pressure by adjusting the stroke of the plunger or changing the displacement of the plunger pump. When the system load changes, the pump can automatically adjust the output flow to adapt to the load demand, thereby keeping the output pressure of the pump stable and unchanged. It is widely used in hydraulic systems that require a constant pressure supply, which can improve the efficiency of the system and reduce energy consumption because it only provides the required flow when needed, avoiding overflow losses.

[0003] The most common adjustment methods for constant-pressure variable plunger pumps during adjustment are mechanical adjustment and electrical adjustment. Mechanical adjustment refers to adjusting the angle of the swash plate to change the plunger stroke, while electrical adjustment means directly driving the swash plate or plunger mechanism with a servo motor and precisely controlling the displacement of the pump through electrical signals. When electrical adjustment is adopted, the main shaft of the plunger pump is often directly fixed to the rotating shaft of the servo motor. During actual use, it is often necessary to adjust the relative position of the motor and the pump according to actual needs or replace pumps of different specifications. When disassembling and assembling the servo motor and the plunger pump of traditional servo-motor-driven constant-pressure variable plunger pumps, it is necessary to remove them from the coupling in sequence, which is inconvenient to operate.

[0004] In view of this, a servo-motor-driven constant-pressure variable plunger pump is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the operation of disassembling and assembling the servo motor and the plunger pump of traditional servo-motor-driven constant-pressure variable plunger pumps requires removing them from the coupling in sequence, and to provide a servo-motor-driven constant-pressure variable plunger pump.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions: A servo motor-driven constant pressure variable plunger pump includes a pump body and a servo motor, and further includes: a connecting component, the connecting component is located between the pump body and the servo motor, the connecting component includes a connecting sleeve, both ends of the connecting sleeve are respectively provided with a first jack and a second jack for the main shaft of the pump body and the rotating shaft of the servo motor to be inserted, a first alignment hole is provided on the main shaft, a second alignment hole is provided on the rotating shaft, and the connecting component is used to connect the main shaft of the pump body and the rotating shaft of the servo motor; a locking component, the locking component is detachably installed on the connecting component, the locking component includes a connecting rod and two inserting rods fixedly connected to the bottom of the connecting rod, two third jacks with dimensions adapted to the inserting rods are provided on the connecting sleeve, two locking blocks are slidably arranged on each inserting rod, a plurality of springs are elastically arranged between the two locking blocks, the bottom of the locking block is arranged in an inclined plane, and the locking component is used to lock the pump body and the servo motor after being inserted into the connecting component.

[0007] Preferably, the pump body includes a housing and a swash plate fixedly connected to the main shaft, a plurality of control pistons are arranged on the swash plate, a cylinder block is arranged in the housing, and a plurality of the control pistons are all slidably arranged in the cylinder block.

[0008] Preferably, the bottom of the locking block is fixedly connected with a slider having a T-shaped cross section, and a sliding groove with dimensions adapted to the slider is provided on the inserting rod.

[0009] Preferably, swing rods are rotatably connected to both sides of the locking block, two swing rods on the same side of the two locking blocks are jointly rotatably connected to a pull rod, and handles are jointly fixedly connected to the bottoms of the two pull rods on both sides of the locking block.

[0010] Preferably, a storage groove is provided on the inserting rod, the storage groove runs through the inserting rod, the groove length of the storage groove is greater than the lengths of the two locking blocks, and the storage groove is used for the locking blocks to move inward under pressure so that the inserting rod can pass through the third jack.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] 1. The servo motor-driven constant pressure variable plunger pump provided by the present utility model can make the connection between the pump body and the servo motor closer through the settings of the connecting component and the locking component, can reduce energy loss, improve transmission efficiency, ensure that the torque output by the servo motor is transmitted to the plunger pump with almost no loss, and can also improve the working stability of the plunger pump.

[0013] 2. The constant-pressure variable plunger pump driven by a servo motor provided by the present utility model is made more convenient for disassembling and assembling the pump body and the servo motor through the setting of the locking component, and can release the locks of both at the same time, so that less time and labor will be consumed during maintenance and repair, the downtime is reduced, and the plunger pump can adapt to different working environments and production requirements more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0015] In the drawings:

[0016] Figure 1 is a schematic perspective view of an embodiment of the present utility model.

[0017] Figure 2 is a disassembled schematic perspective view of an embodiment of the present utility model.

[0018] Figure 3 is a schematic cross-sectional view of a connecting sleeve of an embodiment of the present utility model.

[0019] Figure 4 is a schematic cross-sectional view of a plug rod of an embodiment of the present utility model.

[0020] Figure 5 is a schematic structural view of a locking block of an embodiment of the present utility model.

[0021] Figure 6 is a schematic cross-sectional view of a connecting sleeve of an embodiment of the present utility model.

[0022] In the figure: 1. Pump body, 11. Housing, 12. Main shaft, 121. First alignment hole, 13. Swash plate, 14. Control piston, 15. Cylinder block;

[0023] 2. Connecting component, 21. Connecting sleeve, 211. First jack, 212. Second jack, 213. Third jack;

[0024] 3. Locking component, 31. Connecting rod, 32. Plug rod, 33. Locking block, 331. Slide block, 332. Slide groove, 333. Receiving groove, 34. Spring, 35. Swing rod, 36. Pull rod, 37. Handle;

[0025] 4. Servo motor, 41. Rotating shaft, 42. Second alignment hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] Please refer to Figures 1-6 。

[0028] The constant pressure variable plunger pump driven by the servo motor of the present utility model includes a pump body 1 and a servo motor 4, and further includes: a connecting component 2, the connecting component 2 is located between the pump body 1 and the servo motor 4, the connecting component 2 includes a connecting sleeve 21, and first jacks 211 and second jacks 212 for inserting the main shaft 12 of the pump body 1 and the rotating shaft 41 of the servo motor 4 are respectively opened at both ends of the connecting sleeve 21. A first alignment hole 121 is opened on the main shaft 12, and a second alignment hole 42 is opened on the rotating shaft 41. The connecting component 2 is used to connect the main shaft 12 of the pump body 1 and the rotating shaft 41 of the servo motor 4; a locking component 3, the locking component 3 is detachably installed on the connecting component 2, the locking component 3 includes a connecting rod 31 and two inserting rods 32 fixedly connected to the bottom of the connecting rod 31. Two third jacks 213 adapted to the inserting rods 32 are opened on the connecting sleeve 21. Two locking blocks 33 are slidably arranged on each inserting rod 32. A plurality of springs 34 are elastically arranged between the two locking blocks 33. The bottom of the locking block 33 is arranged in an inclined plane. The locking component 3 is used to lock the pump body 1 and the servo motor 4 after being inserted into the connecting component 2.

[0029] That is to say, when connecting the pump body 1 and the servo motor 4, after inserting them into the first jack 211 and the second jack 212 respectively, then inserting the inserting rods 32 of the locking component 3 into the third jacks 213 of the connecting component 2 can complete the connection of the pump body 1 and the servo motor 4.

[0030] Among them, the pump body 1 includes a housing 11 and a swash plate 13 fixedly connected to the main shaft 12. A plurality of control pistons 14 are arranged on the swash plate 13. A cylinder block 15 is arranged in the housing 11. A plurality of control pistons 14 are all slidably arranged in the cylinder block 15. Since the swash plate 13 is inclined, when the control pistons 14 rotate with the swash plate 13, they can make reciprocating motions to suck and press fluids. The plunger pump belongs to the prior art and will not be elaborated in this embodiment.

[0031] Secondly, a slider 331 with a T-shaped cross-section is fixedly connected to the bottom of the locking block 33. A sliding groove 332 adapted to the size of the slider 331 is formed on the insertion rod 32. The settings of the slider 331 and the sliding groove 332 enable the locking block 33 to remain stable relative to the insertion rod 32 when moving.

[0032] Thirdly, swing rods 35 are rotatably connected to both sides of the locking block 33. Two swing rods 35 on the same side of the two locking blocks 33 are jointly rotatably connected to a pull rod 36. The bottoms of the two pull rods 36 on both sides of the locking block 33 are jointly fixedly connected to a handle 37. The pull rod 36 is disposed through the insertion rod 32. When the handle 37 is pulled downward, the two locking blocks 33 will approach each other under the action of the connecting rod.

[0033] In addition, a receiving groove 333 is formed on the insertion rod 32. The receiving groove 333 runs through the insertion rod 32. The groove length of the receiving groove 333 is greater than the lengths of the two locking blocks 33. The receiving groove 333 is used for the locking block 33 to move into the groove under pressure so that the insertion rod 32 can pass through the third jack 213.

[0034] It should be noted that the length of the locking block 33 from the connecting rod 31 is the same as the diameter of the connecting sleeve 21.

[0035] When using this device, during the process of inserting the insertion rod 32 into the third jack 213, the inclined surface of the locking block 33 will be squeezed by the edge of the third jack 213, causing the locking block 33 to move into the receiving groove 333 until the locking block 33 completely enters the receiving groove 333. When the insertion rod 32 is inserted to the limit position, the locking block 33 just pops out under the action of the spring 34. At this time, both the main shaft 12 and the rotating shaft 41 are locked. In addition, when disassembling, directly pull down the handles 37 on the two insertion rods 32 to make the two locking blocks 33 contract into the receiving groove 333, and then pull out the insertion rod 32.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A servo motor driven constant pressure variable displacement piston pump, comprising a pump body (1) and a servo motor (4), characterized in that: Also includes: A connecting component (2), the connecting component (2) being located between the pump body (1) and the servo motor (4), the connecting component (2) comprising a connecting sleeve (21), the two ends of the connecting sleeve (21) respectively being provided with a first insertion hole (211) and a second insertion hole (212) for inserting the main shaft (12) of the pump body (1) and the rotating shaft (41) of the servo motor (4), the main shaft (12) being provided with a first alignment hole (121), the rotating shaft (41) being provided with a second alignment hole (42), the connecting component (2) being used to connect the main shaft (12) of the pump body (1) and the rotating shaft (41) of the servo motor (4); A locking component (3) is detachably mounted on the connecting component (2), the locking component (3) comprising a connecting rod (31) and two plug rods (32) fixedly connected to the bottom of the connecting rod (31), the connecting sleeve (21) is provided with two third plug holes (213) of sizes matching the plug rods (32), two locking blocks (33) are slidably arranged on the plug rods (32), a plurality of springs (34) are elastically arranged between the two locking blocks (33), the bottom of the locking block (33) is arranged in an inclined surface, and the locking component (3) is used to lock the pump body (1) and the servo motor (4) after being inserted into the connecting component (2).

2. The servo motor (4) driven constant pressure variable displacement piston pump as claimed in claim 1, characterized in that: The pump body (1) comprises a housing (11) and a swash plate (13) fixedly connected to the main shaft (12); a plurality of control pistons (14) are arranged on the swash plate (13); a cylinder body (15) is arranged in the housing (11); and the plurality of control pistons (14) are slidably arranged in the cylinder body (15).

3. The servo motor (4) driving the constant pressure variable displacement piston pump as claimed in claim 2, characterized in that: A sliding block (331) having a T-shaped cross section is fixedly connected to the bottom of the locking block (33), and a sliding groove (332) having a size matching that of the sliding block (331) is provided on the insertion rod (32).

4. The servo motor (4) driving the constant pressure variable displacement piston pump as claimed in claim 3, characterized in that: Both sides of the locking block (33) are rotatably connected to a rocker rod (35), the two rocker rods (35) on the same side of the two locking blocks (33) are rotatably connected to a pull rod (36), and the bottoms of the two pull rods (36) on both sides of the locking block (33) are fixedly connected to a handle (37).

5. The servo motor (4) driving the constant pressure variable displacement piston pump as claimed in claim 4, characterized in that: The insertion rod (32) is provided with a receiving groove (333), the receiving groove (333) is arranged through the insertion rod (32), the groove length of the receiving groove (333) is greater than the length of the two locking blocks (33), and the receiving groove (333) is used for the locking blocks (33) to be pressed and move toward the groove so that the insertion rod (32) passes through the third insertion hole (213).

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