Displacement monitoring and adjusting device based on plunger type hydraulic pump and adjusting method of displacement monitoring and adjusting device

Abstract

The invention relates to the technical field of hydraulic pumps, in particular to a displacement monitoring and adjusting device based on a plunger type hydraulic pump and an adjusting method thereof.The displacement monitoring and adjusting device comprises a shell, an oil outlet pipe and an oil inlet pipe are arranged on the upper side and the lower side of the shell respectively; the oil distribution disc is provided with an oil outlet and an oil inlet which are respectively connected with the oil outlet pipe and the oil inlet pipe; the cylinder body is movably mounted in the shell; the plunger is movably arranged in the cavity, and one end of the plunger is elastically connected with the inner wall of the cavity; the swash plate is movably installed in the shell, and one side of the swash plate is slidably attached to the end, away from the cavity, of the plunger; the circular ring is fixedly mounted on the outer side of the swash plate; and the transition prevention assembly is arranged on the circular ring and used for preventing the swash plate from excessively rotating. According to the displacement monitoring and adjusting device, through cooperation of the abutting plate, the moving rod, the annular groove, the positioning spring, the positioning rod and other parts, the positioning rod can be clamped with the annular groove when the angle rotation of the swash plate is too large, and the situation that the flow of a hydraulic pump is too large or too small due to the fact that the angle rotation of the swash plate is too large is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic pumps, and in particular to a displacement monitoring and regulating device based on a plunger type hydraulic pump and a regulating method thereof. Background Art

[0002] A plunger hydraulic pump is a hydraulic pump that changes the volume of the plunger cylinder through repeated movement of the plunger in the cylinder bore, thereby achieving oil suction and discharge. It can be divided into a fixed-displacement plunger pump and a variable-displacement plunger pump according to the displacement. The variable-displacement plunger pump can change the displacement through an adjusting mechanism, and the swash plate plunger pump is a type of variable-displacement plunger pump.

[0003] By adjusting the inclination angle of the swash plate, the displacement of the plunger pump can be changed. When the displacement and pressure need to be increased, the swash plate can be rotated clockwise to increase the swash plate angle; conversely, when the displacement and pressure need to be reduced, the swash plate can be rotated counterclockwise to reduce the swash plate angle. The existing swash plate type plunger pump can be equipped with multiple sensors to detect the moving distance and moving speed of the plunger in the hydraulic pump, and these values ​​can also reflect the displacement of the hydraulic pump. According to the displacement requirements, the angle of the swash plate can be adjusted accordingly. The adjustment of the swash plate angle is also controlled by precision instruments such as sensors to ensure accuracy. However, the cost of this type of swash plate type plunger pump is relatively high and is suitable for large-scale factories. Small-scale factories usually use the method of manually rotating the swash plate angle. The angle of the swash plate needs to be guaranteed within a certain range. If the angle is too large, the flow rate of the plunger pump will be too large, and if the angle is too small, the flow rate of the hydraulic pump will be too small. It is not easy to control the inclination angle of the swash plate by manually rotating the swash plate, which will cause the flow rate of the plunger pump to be too large or too small. Summary of the invention

[0004] Based on this, it is necessary to provide a displacement monitoring and adjustment device for a plunger hydraulic pump that can prevent excessive rotation of the swash plate in order to solve the above technical problems.

[0005] The present invention provides a displacement monitoring and regulating device based on a plunger hydraulic pump, comprising: The housing has an oil outlet pipe and an oil inlet pipe respectively disposed on the upper and lower sides thereof; An oil distribution plate, fixedly installed inside the housing, the number of which is set to two, with an oil outlet and an oil inlet provided thereon, connected to the oil outlet pipe and the oil inlet pipe respectively; A cylinder body, movably mounted inside the housing, having a plurality of chambers arranged in an annular array thereon, the chambers being interconnected with the oil outlet and the oil inlet; A plunger, movably disposed in the chamber, with one end elastically connected to the inner wall of the chamber; A swash plate, movably mounted in the housing, with one side slidingly engaged with an end of the plunger away from the chamber; A cylinder, fixedly passing through the swash plate, with one end rotatably connected to the inner wall of the shell and the other end movably passing through the shell; A circular ring, fixedly mounted on the outer side of the swash plate; The over-rotation prevention component is arranged on the circular ring and is used to prevent the swash plate from over-rotating.

[0006] In one embodiment, the anti-overload component includes a fixed block, wherein the number of the fixed blocks is set to two, which are fixedly installed on the circular ring and located on both sides of the inclined plate. A fixed cylinder is fixedly arranged in the fixed block, a moving rod is movably arranged in the fixed cylinder, a return spring is fixedly arranged between the moving rod and the inner wall of the fixed cylinder, an annular groove is opened on the moving rod, a positioning cylinder is fixedly arranged under the fixed cylinder, a clamping rod is movably arranged in the positioning cylinder, one end of the clamping rod is movably abutted against the moving rod, and the other end movably passes through the fixed block, and a positioning spring is fixedly arranged between the clamping rod and the positioning cylinder.

[0007] In one of the embodiments, a slot is provided at the center of the swash plate, and movable rods are axially symmetrically arranged on both sides of the slot, one end of the movable rod movably passes through the swash plate and an abutment plate is fixedly arranged at the end, a connecting spring is fixedly arranged between the movable rod and the inner wall of the swash plate, and the abutment plate movably abuts against one end of the moving rod away from the return spring.

[0008] In one of the embodiments, two movable rods are fixedly provided with square blocks at one end close to each other, an inclined groove is provided on the square block, a support block is fixedly provided in the inclined plate located in the groove, a screw rod is movably provided through the center of the support block, a lifting block is movably sleeved on the outer side of the screw rod, a clamping block is fixedly provided on the top of the lifting block, a plurality of clamping grooves are provided on the top of the circular ring, the clamping block is movably clamped with the clamping grooves, notches are provided on both sides of the lifting block, and the notches are movably abutted against the inclined grooves.

[0009] In one of the embodiments, a gear is fixedly provided at the bottom of the screw rod, a push rod is movably provided in the cylinder, a rack is fixedly provided on the top of the push rod, the rack is located outside the cylinder and is slidably connected to the slot, and the rack is meshed with the gear for transmission.

[0010] In one of the embodiments, a fixing ring is fixedly provided on the outer side of the shell, the cylinder movably passes through the fixing ring, a plurality of sealing rings are provided in an annular array inside the fixing ring, and the sealing rings movably abut against the outer side of the cylinder.

[0011] In one of the embodiments, a positioning ring is fixedly provided on one side of the fixing ring, a circular groove is provided in the positioning ring, a rotating ring is rotatably provided in the circular groove, an annular array on the rotating ring is provided with arc grooves whose number is the same as the sealing rings, an annular array outside the positioning ring is provided with movable grooves whose number is the same as the arc grooves, the movable grooves are connected to the arc grooves, a movable block is movably provided in the movable groove, a positioning rod is slidably fitted in the arc groove, the positioning rod is fixedly connected to the movable block, a connecting rod is fixedly provided at the bottom of the movable block, the connecting rod is slidably connected to the bottom of the positioning ring and is fixedly connected to the sealing ring.

[0012] In one of the embodiments, a rotation groove is provided on one side of the positioning ring, a rotation rod is rotatably arranged in the rotation groove, one end of the rotation rod is fixedly connected to the rotating ring, a fixing sleeve is movably clamped on the outer side of the push rod, a cross bar is fixedly arranged in the fixing sleeve, a limiting groove is provided on the cross bar, the limiting groove is movably abutted against the rotating rod, and a torsion spring is fixedly arranged on the top of the rotating ring and the inner wall of the circular groove.

[0013] In one of the embodiments, a movable groove is provided in the fixing sleeve, a limiting rod is fixedly provided on the top of the push rod, and the limiting rod is movably connected to the movable groove.

[0014] In one embodiment, a displacement monitoring and adjustment method based on a plunger hydraulic pump includes the following steps: S1, rotating a cylinder body, the cylinder body drives a plunger to slide along an inclined swash plate surface, and the plunger reciprocates in a chamber; S2, when the swash plate angle needs to be adjusted, the push rod is pushed inward along the cylinder, the push rod drives the rack to move, thereby driving the gear to rotate, and then the screw rod rotates to drive the lifting block and the clamping block to move downward, the clamping block is not engaged with the clamping slot, and the rotating cylinder can drive the swash plate to rotate; S3, the movement of the push rod also drives the fixed sleeve and the cross bar to move, so that the rotating rod and the rotating ring rotate, and the rotation of the rotating ring drives the curved groove to rotate, so that the moving block, the connecting rod and the sealing ring move; S4, the lifting block moves downward to drive the notch to move downward so that the movable rod and the abutment plate move away from each other, the abutment plate abuts against the movable rod so that the movable rod moves into the positioning tube, and the clamping rod clamps with the annular groove.

[0015] The above-mentioned displacement monitoring and adjustment device based on the plunger hydraulic pump and its adjustment method, through the cooperation of multiple components such as the abutment plate, the moving rod, the annular groove, the positioning spring, the clamping rod, etc., realizes that when the swash plate angle is rotated too much, the clamping rod will be engaged with the annular groove, thereby avoiding the swash plate angle being too large and causing the flow of the hydraulic pump to be too large or too small; through the cooperation of multiple components such as the rotating ring, the curved groove, the positioning rod, the moving block and the connecting rod, it is realized that when the swash plate is working, the intersection of the cylinder and the fixed ring is wrapped to enhance the sealing, and when the swash plate angle needs to be adjusted, it does not abut against the cylinder, thereby ensuring the normal rotation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a schematic diagram of the structure of the chamber in the present invention; Figure 4 Schematic diagram of the positional relationship between the ring and the slant plate in the present invention; Figure 5 for Figure 4 The enlarged schematic diagram of part A in the middle; Figure 6 It is a schematic diagram of the structure of the ring in the present invention; Figure 7 for Figure 6 The enlarged schematic diagram of part B in the middle; Figure 8 It is a structural schematic diagram of the connecting spring in the present invention; Fig. 9 It is a schematic diagram of the structure of the overload prevention component in the present invention; Fig.10 It is a structural schematic diagram of the annular groove in the present invention; Fig.11 It is a schematic diagram of the internal structure of the notch in the present invention; Fig.12 It is a schematic diagram of the structure of the limiting groove in the present invention; Fig.13 It is a structural schematic diagram of the circular groove in the present invention; Fig.14 It is a schematic diagram of the structure of the arc groove in the present invention.

[0018] Reference numerals: 1. Shell; 2. Oil distribution plate; 3. Cylinder; 4. Chamber; 5. Plunger; 6. Cylinder; 7. Ring; 71. Slot; 8. Anti-overload assembly; 81. Fixed block; 82. Fixed cylinder; 83. Moving rod; 84. Return spring; 85. Ring groove; 86. Positioning cylinder; 87. Slot; 88. Positioning spring; 9. Inclined plate; 91. Notch; 10. Movable rod; 11. Abutment plate; 12. Connecting spring; 13. Square block; 131. Slot; 14. Support block; 15. Screw; 16. Lifting block; 161. Notch; 17. Block; 18. Gear; 19. Push rod; 20. Rack; 21. Fixed ring; 22. Sealing ring; 23. Positioning ring; 231. Circular groove; 232. Moving groove; 233. Rotating groove; 24. Rotating ring; 241. Arc groove; 25. Moving block; 26. Positioning rod; 27. Connecting rod; 28. Rotating rod; 29. ​​Fixed sleeve; 291. Movable groove; 30. Cross bar; 301. Limiting groove; 31. Torsion spring; 32. Limiting rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Unless otherwise defined, all technical and scientific terms used in the specification of the present invention have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any and all combinations of one or more related listed items.

[0024] Combine the following Figure 1-Figure 14 The present invention describes a displacement monitoring and regulating device based on a plunger hydraulic pump and a regulating method thereof.

[0025] like Figure 1-Figure 10 As shown, in one embodiment, it includes a housing 1, an oil distribution plate 2, a cylinder block 3, a plunger 5, a swash plate 9, a cylinder 6, a ring 7 and an overload prevention assembly 8.

[0026] Among them, an oil outlet pipe and an oil inlet pipe are provided on the upper and lower sides of the shell 1, and an oil distribution plate 2 is fixedly installed inside the shell 1, and the number is set to two. The oil distribution plate 2 is provided with an oil outlet and an oil inlet, the oil outlet is connected to the oil outlet pipe, and the oil inlet is connected to the oil inlet pipe. A plurality of chambers 4 are provided on the cylinder body 3, and the plurality of chambers 4 are alternately communicated with the oil outlet and the oil inlet. A plunger 5 is movably arranged in the chamber 4, and one end is elastically connected to the inner wall of the chamber 4. A swash plate 9 is movably installed in the shell 1, and one end of the plunger 5 is slidably fitted with one side of the swash plate 9. The cylinder 6 is fixedly penetrated through the swash plate 9, and one end movably penetrates the shell 1 and is located outside the shell 1. The ring 7 is sleeved on the outside of the swash plate 9 to wrap the swash plate 9 inside. The anti-over rotation component 8 can prevent the swash plate 9 from excessive rotation.

[0027] Specifically, the cylinder 6 is rotated, and the rotation of the cylinder 6 can drive the swash plate 9 to tilt, and then the motor of the cylinder body 3 is started. The rotation of the cylinder body 3 will drive the chamber 4 and multiple plungers 5 to rotate together, and the other end of the plunger 5 will slide along the surface of the swash plate 9. Since the swash plate 9 is inclined, the plunger 5 will reciprocate horizontally in the chamber 4 during the movement. When the plunger 5 moves in the direction close to the swash plate 9, the area of ​​the chamber 4 will be increased. In this process, oil will be drawn in through the oil inlet and the oil inlet pipe, and then the chamber 4 will continue to rotate until the plunger 5 moves in the direction away from the swash plate 9, thereby filling the chamber 4 with oil. The oil is discharged through the oil outlet and the oil outlet pipe on the oil distribution plate 2. In order to adjust the displacement of the hydraulic pump, it can be achieved by adjusting the inclination angle of the swash plate 9. When the displacement needs to be increased, the cylinder 6 and the swash plate 9 are rotated clockwise, and when the displacement needs to be reduced, the cylinder 6 and the swash plate 9 are rotated counterclockwise. However, the angle of the swash plate 9 cannot be excessively adjusted, which may easily lead to excessive or insufficient displacement, affecting the normal use of the pump. Therefore, the anti-over-rotation component 8 can be used to prevent the swash plate 9 from rotating too much or too little, and keep it within a proper range to ensure the normal use of the hydraulic pump. The ring 7 provides support for the anti-over-rotation component 8.

[0028] See also Figure 6-Figure 10 As shown, in the present embodiment, the over-prevention assembly 8 includes a fixed block 81, the number of which is set to two, which are fixedly mounted on the circular ring 7 and located on both sides of the swash plate 9, a fixed cylinder 82 is fixedly arranged in the fixed block 81, a moving rod 83 is movably arranged in the fixed cylinder 82, a reset spring 84 is fixedly arranged between the moving rod 83 and the inner wall of the fixed cylinder 82, an annular groove 85 is opened on the moving rod 83, a positioning cylinder 86 is fixedly arranged below the fixed cylinder 82, a clamping rod 87 is movably arranged in the positioning cylinder 86, one end of the clamping rod 87 is movably abutted against the moving rod 83, and the other end movably passes through the fixed block 81, and a positioning spring 88 is fixedly arranged between the clamping rod 87 and the positioning cylinder 86.

[0029] Specifically, in the initial state, the positioning spring 88 is in a compressed state, and the return spring 84 is in a normal telescopic state. When the displacement needs to be reduced, the cylinder 6 and the swash plate 9 are rotated counterclockwise, and the swash plate 9 continues to rotate and stops after reaching a preset angle. However, if the operator is inexperienced and cannot grasp the rotation angle, the swash plate 9 will continue to rotate. When the swash plate 9 abuts against the moving rod 83, the moving rod 83 will be pushed to move into the fixed cylinder 82. During the movement of the moving rod 83, the clamping rod 87 will fit with the surface of the moving rod 83, and the clamping rod 87 will not move. When the moving rod 83 is pushed by the swash plate 9 to move to the annular groove 85 and align with the clamping rod 87, the positioning spring 88 will push the clamping rod 87 to move into the annular groove 85, and the moving rod 83 cannot continue to move. The swash plate 9 will not be able to continue to rotate, thus preventing the swash plate 9 from rotating excessively and causing the flow of the hydraulic pump to be too small. The positioning cylinder 86 provides support for the positioning spring 88, and the return spring 84 can push the moving rod 83 back to the initial position after the clamping rod 87 moves out of the annular groove 85. The fixed block 81 provides support for the fixed cylinder 82. Similarly, when the swash plate 9 rotates too much clockwise, another clamping rod 87 will be triggered to engage with the annular groove 85. When the angle of the swash plate 9 is adjusted, it first contacts the moving rod 83, and a return spring 84 is connected to one end of the moving rod 83. The return spring 84 can play a certain buffering role. Without the moving rod 83 and the return spring 84, if the swash plate 9 rotates excessively, it will collide with the fixed block 81 and cause damage to the swash plate 9.

[0030] See also Figure 6-Figure 8 As shown, in the present embodiment, a slot 91 is provided at the center of the swash plate 9, and movable rods 10 are axially symmetrically provided on both sides of the slot 91 of the swash plate 9. One end of the movable rod 10 movably penetrates the swash plate 9 and an abutment plate 11 is fixedly provided at the end. A connecting spring 12 is fixedly provided between the movable rod 10 and the inner wall of the swash plate 9, and the abutment plate 11 movably abuts against one end of the moving rod 83 away from the return spring 84.

[0031] Specifically, when the swash plate 9 starts to rotate, the two movable rods 10 are moved away from each other on both sides of the slot 91. The movement of the movable rods 10 drives the abutment plates 11 to move, and the abutment plates 11 move to the outside of the swash plate 9. During this process, the connecting springs 12 are stretched. Subsequently, as the swash plate 9 rotates, the abutment plates 11 come into contact with the moving rods 83, thereby preventing the swash plate 9 from directly abutting against the moving rods 83 and damaging the swash plate 9 itself. When the angle adjustment of the swash plate 9 is completed, the force applied to the movable rods 10 is removed, and the movable rods 10 are pushed back to their initial positions under the action of the connecting springs 12.

[0032] See also Figure 7As shown, in this embodiment, two movable rods 10 are fixedly provided with square blocks 13 at one end close to each other, and an inclined groove 131 is provided on the square block 13. The swash plate 9 is located in the groove 91 and a support block 14 is fixedly provided. A screw rod 15 is movably provided through the center of the support block 14, and a lifting block 16 is movably sleeved on the outer side of the screw rod 15. A clamping block 17 is fixedly provided on the top of the lifting block 16. A plurality of clamping grooves 71 are provided on the top of the circular ring 7. The clamping block 17 is movably engaged with the clamping grooves 71. Notches 161 are provided on both sides of the lifting block 16, and the notches 161 are movably abutted against the inclined grooves 131.

[0033] Specifically, during the use of the swash plate 9, the clamping block 17 is clamped with one of the clamping grooves 71 at the top of the ring 7, which can ensure the stability of the swash plate 9. Before adjusting the angle of the swash plate 9, the screw rod 15 is rotated. The rotation of the screw rod 15 will drive the lifting block 16 to move downward. The lifting block 16 drives the clamping block 17 to move downward and disengage from the clamping groove 71, which is convenient for the subsequent rotation of the swash plate 9. The downward movement of the lifting block 16 will also drive the notch 161 to move downward and abut against the inclined groove 131 of the square block 13, so that the square blocks 13 move away from each other, and the movable rod 10 also moves away to make the abutment plate 11 move to the outside of the swash plate 9 for easy abutment with the moving rod 83. During the up and down movement, one side of the lifting block 16 is slidably connected to the inner wall of the notch 91, which can prevent the lifting block 16 from rotating with the rotation of the screw rod 15 during the lifting process. The support block 14 provides support for the screw rod 15.

[0034] See also Figure 6-Figure 8 and Fig.11 As shown, in this embodiment, a gear 18 is fixedly provided at the bottom of the screw rod 15, a push rod 19 is movably provided in the cylinder 6, a rack 20 is fixedly provided on the top of the push rod 19, the rack 20 is located on the outside of the cylinder 6 and is slidably connected to the slot 91, and the rack 20 is meshed with the gear 18 for transmission.

[0035] Specifically, when the angle of the swash plate 9 needs to be adjusted, the push rod 19 is pushed toward the inside of the housing 1 along the cylinder 6, and the push rod 19 drives the rack 20 to move. During the movement, the gear 18 and the screw rod 15 are driven to rotate. The rotation of the screw rod 15 drives the lifting block 16 and the block 17 to move downward, which is convenient for the subsequent rotation of the swash plate 9. During the descending process of the lifting block 16, the two abutment plates 11 are also pushed to move to the outside of the swash plate 9, so that if the swash plate 9 rotates excessively in the future, it will abut against the moving rod 83. After the angle adjustment of the swash plate 9 is completed, the push rod 19 is rotated, and the push rod 19 drives the cylinder 6 to rotate synchronously, and the angle of the swash plate 9 is adjusted. After the angle adjustment is completed, the push rod 19 is pulled outward. During the withdrawal of the push rod 19, the gear 18 and the screw rod 15 are driven by the rack 20 to rotate in the opposite direction, so that the lifting block 16 and the block 17 move upward, and the block 17 is engaged with the slot 71 to ensure the stability of the swash plate 9 during use. The abutment plate 11 also returns to the initial position under the action of the connecting spring 12.

[0036] See also Figure 5 and Fig.13 As shown, in this embodiment, a fixing ring 21 is fixedly provided on the outer side of the shell 1, and the cylinder 6 movably passes through the fixing ring 21. A plurality of sealing rings 22 are provided in an annular array inside the fixing ring 21, and the sealing ring 22 movably abuts against the outer side of the cylinder 6.

[0037] Specifically, when the swash plate 9 is in use, a plurality of sealing rings 22 surround the outside of the cylinder 6. The cylinder 6 passes through the fixing ring 21 and the housing 1. There is a gap at the junction of the fixing ring 21 and the cylinder 6. This will result in insufficient sealing of the housing 1, and dust and other debris from the outside will enter the interior of the housing 1. The sealing ring 22 wrapped around the outside of the cylinder 6 can improve the sealing.

[0038] See also Figure 12-14 As shown, in this embodiment, a positioning ring 23 is fixedly provided on one side of the fixed ring 21, a circular groove 231 is provided in the positioning ring 23, a rotating ring 24 is rotatably provided in the circular groove 231, an annular array is provided on the rotating ring 24, and the same number of arc grooves 241 as the number of the sealing rings 22 are provided, and an annular array is provided on the outer side of the positioning ring 23. The same number of moving grooves 232 as the number of the arc grooves 241 are provided, and the moving grooves 232 are connected to the arc grooves 241. The moving grooves 232 are connected to the arc grooves 241. A moving block 25 is movably provided in the moving groove 232, and a positioning rod 26 is slidably fitted in the arc groove 241. The positioning rod 26 is fixedly connected to the moving block 25, and a connecting rod 27 is fixedly provided at the bottom of the moving block 25. The connecting rod 27 is slidably connected to the bottom of the positioning ring 23 and is fixedly connected to the sealing ring 22.

[0039] Specifically, before adjusting the angle of the swash plate 9, it is necessary to first release the contact between the sealing ring 22 and the outer wall of the cylinder 6, because the contact between the sealing ring 22 and the cylinder 6 will affect the rotation of the cylinder 6, and the rotating ring 24 is rotated in the circular groove 231 opened in the positioning ring 23. The rotation of the rotating ring 24 will drive the arc groove 241 to rotate, and the rotation of the arc groove 241 will drive the positioning rod 26 to move. The movement of the positioning rod 26 will drive the moving block 25 to move along the moving groove 232 toward the outside of the positioning ring 23. The movement of the moving block 25 will drive the connecting rod 27 and the sealing ring 22 to move. The sealing ring 22 will move toward the outside of the fixed ring 21 and no longer abut against the outside of the cylinder 6. Then the cylinder 6 can rotate without wear. After the angle adjustment of the swash plate 9 is completed, the rotating ring 24 is rotated in the opposite direction to realize that the moving block 25, the connecting rod 27 and the sealing ring 22 return to the initial position, thereby continuing to improve the sealing performance.

[0040] See also Figure 12-14As shown, in the present embodiment, a rotation groove 233 is provided on one side of the positioning ring 23, a rotation rod 28 is rotatably arranged in the rotation groove 233, one end of the rotation rod 28 is fixedly connected to the rotation ring 24, a fixing sleeve 29 is movably clamped on the outer side of the push rod 19, a cross bar 30 is fixedly arranged in the fixing sleeve 29, a limiting groove 301 is provided on the cross bar 30, the limiting groove 301 is movably abutted against the rotation rod 28, and a torsion spring 31 is fixedly arranged on the top of the rotating ring 24 and the inner wall of the circular groove 231.

[0041] Specifically, when the angle of the swash plate 9 needs to be adjusted, the push rod 19 is pushed into the cylinder 6. The movement of the push rod 19 will drive the rack 20 to move, thereby rotating the gear 18 and the screw rod 15. The rotation of the screw rod 15 will release the engagement between the block 17 and the engagement groove 71, and the abutment plate 11 will also move to the outside of the swash plate 9. In addition, the movement of the push rod 19 will also drive the fixed sleeve 29 to move. The movement of the fixed sleeve 29 drives the cross bar 30 to move. During the movement of the cross bar 30, the limit groove 301 will abut against the rotating rod 28, so that the rotating rod 28 gradually rotates clockwise. The rotation of the rotating rod 28 in the rotating groove 233 drives the rotating ring 24 to rotate, and finally realizes that the multiple sealing rings 22 no longer abut against the outer side of the cylinder 6. During the rotation of the rotating ring 24, the torsion spring 31 will twist and store energy. Then the push rod 19 moves to the initial position outside the housing 1, and the rotating rod 28 gradually loses the abutment of the limit groove 301. Under the action of the torsion spring 31, the rotating ring 24 is driven to return to the initial state.

[0042] See also Fig.13 As shown, in this embodiment, a movable groove 291 is opened in the fixing sleeve 29 , and a limiting rod 32 is fixedly provided on the top of the push rod 19 , and the limiting rod 32 is movably connected to the movable groove 291 .

[0043] Specifically, the movement of the push rod 19 toward the inside of the housing 1 will drive the limit rod 32 to move. The limit rod 32 is movably arranged in the movable groove 291. The movement of the limit rod 32 will drive the fixed sleeve 29 to move synchronously. The movement of the fixed sleeve 29 will eventually achieve that the sealing ring 22 is no longer in contact with the outer side of the cylinder 6. Then the push rod 19 is rotated. The rotation of the push rod 19 will drive the cylinder 6 and the swash plate 9 to rotate, so as to adjust the angle of the swash plate 9. Secondly, the rotation of the push rod 19 will drive the limit rod 32 to rotate in the movable groove 291, and the fixed sleeve 29 remains stationary, and the cross bar 30 also remains stationary. The fixed sleeve 29 can also be connected to the outer wall of the shell 1 through a telescopic rod, which can better ensure that the fixed sleeve 29 can remain stationary during the rotation of the push rod 19, and the sealing ring 22 does not abut against the outer side of the cylinder 6. After the angle of the swash plate 9 is adjusted, the push rod 19 is pulled outward, and the push rod 19 will drive the fixed sleeve 29 to move synchronously with the help of the positional relationship between the limit rod 32 and the movable groove 291, and the fixed sleeve 29 moves in the opposite direction to the initial position. Under the action of the torsion spring 31, the rotating ring 24 rotates in the opposite direction to achieve the sealing ring 22 to abut against the outer side of the cylinder 6 again, thereby improving the sealing performance.

[0044] In this embodiment, the following steps are included: S1, rotating the cylinder body 3, the cylinder body 3 drives the plunger 5 to slide along the inclined surface of the swash plate 9, and the plunger 5 reciprocates in the chamber 4; S2, when the angle of the swash plate 9 needs to be adjusted, the push rod 19 is pushed inward along the cylinder 6, and the push rod 19 drives the rack 20 to move, thereby driving the gear 18 to rotate, and then the screw rod 15 rotates to drive the lifting block 16 and the clamping block 17 to move downward, and the clamping block 17 is not engaged with the clamping groove 71, and the rotating cylinder 6 can drive the swash plate 9 to rotate; S3, the movement of the push rod 19 also drives the fixed sleeve 29 and the cross bar 30 to move, so that the rotating rod 28 and the rotating ring 24 rotate, and the rotation of the rotating ring 24 drives the curved groove to rotate, so that the moving block 25, the connecting rod 27 and the sealing ring 22 move; S4, the lifting block 16 moves downward to drive the notch 161 to move downward so that the movable rod 10 and the abutment plate 11 move away from each other, the abutment plate 11 abuts against the moving rod 83 so that the moving rod 83 moves into the positioning tube 86, and the clamping rod 87 clamps with the annular groove 85.

[0045] Specifically, the rotation of the cylinder body 3 drives the plunger 5 to slide along the surface of the swash plate 9 to realize the reciprocating movement of the plunger 5 in the chamber 4. The reciprocating movement of the plunger 5 can realize the oil pumping and oil discharge of the hydraulic pump. When adjusting the angle of the swash plate 9, the cylinder 6 can be rotated to realize the adjustment of the angle of the swash plate 9. During the rotation of the swash plate 9, the over-rotation prevention component 8 can prevent the swash plate 9 from rotating too much. The rotation of the rotating ring 24 realizes the movement of the moving block 25, the connecting rod 27 and the sealing ring 22 through the cooperation of the curved groove and the positioning rod 26. When the swash plate 9 is working, the intersection of the cylinder 6 and the fixed ring 21 can be wrapped to enhance the sealing performance. When the angle of the swash plate 9 needs to be adjusted, it does not abut against the cylinder 6, thereby ensuring the normal rotation of the cylinder 6.

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A displacement monitoring and regulating device based on a plunger hydraulic pump, characterized in that: include: The housing has an oil outlet pipe and an oil inlet pipe respectively disposed on the upper and lower sides thereof; An oil distribution plate, fixedly installed inside the housing, the number of which is set to two, with an oil outlet and an oil inlet provided thereon, connected to the oil outlet pipe and the oil inlet pipe respectively; A cylinder body, movably mounted inside the housing, having a plurality of chambers arranged in an annular array thereon, the chambers being interconnected with the oil outlet and the oil inlet; A plunger, movably disposed in the chamber, with one end elastically connected to the inner wall of the chamber; A swash plate, movably mounted in the housing, with one side slidingly engaged with an end of the plunger away from the chamber; A cylinder, fixedly passing through the swash plate, with one end rotatably connected to the inner wall of the shell and the other end movably passing through the shell; A circular ring, fixedly mounted on the outer side of the swash plate; The over-rotation prevention component is arranged on the circular ring and is used to prevent the swash plate from over-rotating.

2. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 1 is characterized in that: The anti-overload component includes a fixed block, and the number of the fixed blocks is set to two, which are fixedly installed on the circular ring and located on both sides of the inclined plate. A fixed cylinder is fixedly arranged in the fixed block, a moving rod is movably arranged in the fixed cylinder, a return spring is fixedly arranged between the moving rod and the inner wall of the fixed cylinder, an annular groove is opened on the moving rod, a positioning cylinder is fixedly arranged below the fixed cylinder, a clamping rod is movably arranged in the positioning cylinder, one end of the clamping rod is movably abutted against the moving rod, and the other end movably passes through the fixed block, and a positioning spring is fixedly arranged between the clamping rod and the positioning cylinder.

3. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 2 is characterized in that: A slot is provided at the center of the swash plate, and movable rods are axially symmetrically arranged on both sides of the slot. One end of the movable rod movably passes through the swash plate and an abutment plate is fixedly arranged at the end. A connecting spring is fixedly arranged between the movable rod and the inner wall of the swash plate, and the abutment plate movably abuts against one end of the moving rod away from the return spring.

4. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 3 is characterized in that: The two movable rods are fixedly provided with square blocks at one end close to each other, and an oblique groove is provided on the square block. The inclined plate is located in the groove and a support block is fixedly provided. A screw rod is movably provided through the center of the support block, and a lifting block is movably sleeved on the outer side of the screw rod. A clamping block is fixedly provided on the top of the lifting block, and a plurality of clamping grooves are provided on the top of the circular ring. The clamping block is movably clamped with the clamping grooves, and notches are provided on both sides of the lifting block, and the notches are movably abutted against the oblique grooves.

5. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 4 is characterized in that: A gear is fixedly arranged at the bottom of the screw rod, a push rod is movably arranged in the cylinder, a rack is fixedly arranged on the top of the push rod, the rack is located outside the cylinder and is slidably connected to the notch, and the rack is meshed with the gear for transmission.

6. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 5, characterized in that: A fixing ring is fixedly arranged on the outer side of the shell, and the cylinder movably passes through the fixing ring. A plurality of sealing rings are arranged in an annular array inside the fixing ring, and the sealing rings movably abut against the outer side of the cylinder.

7. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 6, characterized in that: A positioning ring is fixedly provided on one side of the fixed ring, a circular groove is provided in the positioning ring, a rotating ring is rotatably provided in the circular groove, an annular array is provided on the rotating ring, the same number of arc grooves as the sealing ring is provided, an annular array is provided on the outer side of the positioning ring, the same number of moving grooves as the arc grooves are provided, the moving grooves are communicated with the arc grooves, a moving block is movably provided in the moving groove, a positioning rod is slidably fitted in the arc groove, the positioning rod is fixedly connected to the moving block, a connecting rod is fixedly provided at the bottom of the moving block, the connecting rod is slidably connected to the bottom of the positioning ring and is fixedly connected to the sealing ring.

8. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 7, characterized in that: A rotating groove is provided on one side of the positioning ring, a rotating rod is rotatably arranged in the rotating groove, one end of the rotating rod is fixedly connected to the rotating ring, a fixing sleeve is movably clamped on the outer side of the push rod, a cross bar is fixedly arranged in the fixing sleeve, a limiting groove is provided on the cross bar, the limiting groove is movably abutted against the rotating rod, and a torsion spring is fixedly arranged on the top of the rotating ring and the inner wall of the circular groove.

9. The displacement monitoring and regulating device based on a plunger hydraulic pump according to claim 8, characterized in that: A movable groove is provided in the fixing sleeve, a limiting rod is fixedly provided on the top of the push rod, and the limiting rod is movably connected to the movable groove.

10. The displacement monitoring and adjustment method based on a plunger hydraulic pump according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, rotating the cylinder body, the cylinder body drives the plunger to slide along the inclined swash plate surface, and the plunger reciprocates in the chamber; S2, when the swash plate angle needs to be adjusted, the push rod is pushed inward along the cylinder, the push rod drives the rack to move, thereby driving the gear to rotate, and then the screw rod rotates to drive the lifting block and the clamping block to move downward, the clamping block is not engaged with the clamping slot, and the rotating cylinder can drive the swash plate to rotate; S3, the movement of the push rod also drives the fixed sleeve and the cross bar to move, so that the rotating rod and the rotating ring rotate, and the rotation of the rotating ring drives the curved groove to rotate, so that the moving block, the connecting rod and the sealing ring move; S4, the lifting block moves downward to drive the notch to move downward so that the movable rod and the abutment plate move away from each other, the abutment plate abuts against the movable rod so that the movable rod moves into the positioning tube, and the click rod is engaged with the annular groove.

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