A hydraulic pump displacement adjustment mechanism

Abstract

This utility model provides a hydraulic pump displacement adjustment mechanism, relating to the field of hydraulic pumps. The hydraulic pump displacement adjustment mechanism includes a pipe body, with a mounting bracket fixedly connected to the inner wall of the pipe body. Two first through slots are formed on one side of the mounting bracket, and a conical pile is fixedly connected to one side of the mounting bracket. A fixing bracket is fixedly connected to the inner wall of the pipe body, and the fixing bracket is slidably connected to the pipe body. Two second through slots are formed on one side of the fixing bracket, and a sealing pipe is fixedly connected to one side of the fixing bracket. A sloped sealing groove is formed on one side of the sealing pipe, and the sloped sealing groove fits into the conical pile. This hydraulic pump displacement adjustment mechanism, through its downstream displacement adjustment mechanism, follows the natural flow direction of hydraulic oil, significantly reducing oil flow resistance, avoiding eddies and pressure losses caused by traditional lateral obstruction, and significantly improving the energy conversion efficiency of the hydraulic pump.

Description

Technical Field

[0001] This utility model relates to a hydraulic pump displacement adjustment mechanism, specifically a hydraulic pump displacement adjustment mechanism, and belongs to the field of hydraulic pump technology. Background Technology

[0002] A hydraulic pump is a power component in a hydraulic system. It is mainly driven by an engine or electric motor and is used to draw in liquid and discharge it from the hydraulic tank to form pressurized oil, which is then delivered to the actuator. Hydraulic pumps are widely used in mechanical engineering, transmission and hydraulic transmission and other fields.

[0003] The prior art patent application number is 202322714801.1, entitled "A Variable Displacement Hydraulic Pump," which includes a hydraulic pump and an adjusting mechanism. The hydraulic pump is provided with an inlet and an outlet. The adjusting mechanism includes a mounting housing, in which a sliding plug is disposed. A screw is threaded through the mounting housing, and one end of the screw located inside the mounting housing is rotatably connected to the plug. A handwheel is fixedly installed on the other end of the screw located outside the mounting housing. By setting up the adjusting mechanism, the sliding ability of the plug within the mounting housing and the threaded connection of the screw on the mounting housing allow the position of the plug within the mounting housing to be adjusted by rotating the screw with the handwheel, thereby changing the flow of liquid within the mounting housing.

[0004] Existing hydraulic pumps use a top-down plug design to adjust displacement. This longitudinal blocking method has significant limitations in actual operation. On the one hand, it directly interferes with the smooth flow trajectory of hydraulic oil in the pump, disrupting the original flow field stability. On the other hand, it easily generates local pressure fluctuations or eddies in the blocking area, which may not only increase the operating noise of the hydraulic system, but also indirectly lead to increased pump energy consumption and decreased output efficiency due to increased fluid flow resistance, thus adversely affecting the long-term stable operation of the hydraulic pump. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic pump displacement adjustment mechanism to solve the above-mentioned problems. In order to solve the problem that the longitudinal blocking method in the prior art directly interferes with the smooth flow trajectory of hydraulic oil in the pump during actual operation, destroys the original flow field stability, and is prone to generating local pressure fluctuations or eddies in the blocking area. This may not only increase the operating noise of the hydraulic system, but also indirectly lead to increased pump energy consumption and decreased output efficiency due to increased liquid flow resistance.

[0006] This utility model is achieved through the following technical solution: a hydraulic pump displacement adjustment mechanism.

[0007] The device includes a pipe body, with a mounting bracket fixedly connected to the inner wall of the pipe body. Two first through slots are opened on one side of the mounting bracket, and a tapered pile is fixedly connected to one side of the mounting bracket. A fixing bracket is fixedly connected to the inner wall of the pipe body, and the fixing bracket is slidably connected to the pipe body. Two second through slots are opened on one side of the fixing bracket. The mounting bracket provides stable support for the tapered pile. The first and second through slots cooperate to allow hydraulic oil to flow. The sliding design of the fixing bracket provides a basis for subsequent adjustment of the blocking state, ensuring the flexibility of structural adjustment.

[0008] Preferably, a sealing tube is fixedly connected to one side of the fixing frame, and a sloping sealing groove is provided on one side of the sealing tube. The sloping sealing groove fits into the tapered pile. The tight fit between the sloping sealing groove and the tapered pile can greatly improve the sealing performance, reduce the leakage of hydraulic oil when it is blocked, and the fitting structure can disperse the contact pressure and extend the service life of the component.

[0009] Preferably, an installation chamber is fixedly connected between the inner walls of the tube body, and a gear driven screw is rotatably connected to the inner wall of the installation chamber. One end of the gear driven screw passes through the installation chamber and extends to the outside of the installation chamber. The installation chamber provides protection and a stable installation environment for the gear driven screw, avoiding direct contact with hydraulic oil and corrosion. At the same time, the screw rotation design provides a power transmission path for driving the fixed frame to move.

[0010] Preferably, a threaded sleeve is screwed onto the outer side of the driven screw of the gear, and one end of the threaded sleeve is fixedly connected to the fixed frame. The screwed engagement between the screw and the threaded sleeve can convert the rotational motion of the screw into the linear motion of the threaded sleeve, thereby driving the fixed frame to slide precisely and achieve precise adjustment of the hydraulic oil flow.

[0011] Preferably, a sealing sleeve is fixedly connected to one side of the installation chamber. The sealing sleeve is located outside the driven screw of the gear, and one end of the sealing sleeve extends into the interior of the threaded sleeve. The sealing sleeve can isolate the hydraulic oil from the connection between the driven screw of the gear and the threaded sleeve, prevent the oil from seeping in and affecting the accuracy of the threaded transmission, and at the same time prevent impurities from entering the transmission structure and causing jamming.

[0012] Preferably, a limiting sleeve is fixedly connected to the outer side of the tube body. Two limiting grooves are opened on the outer side of the limiting sleeve. The limiting sleeve provides an installation reference for the subsequent limiting rod. The limiting grooves can limit the position of the rod, thereby fixing the angle of the rotating rod, preventing the adjusted structure from shifting due to external force, and ensuring the stable operation of the hydraulic system.

[0013] Preferably, a rotating rod is rotatably connected to the outer side of the tube body. The bottom end of the rotating rod passes through the tube body and the mounting chamber and extends into the inner cavity of the mounting chamber. A drive gear is fixedly connected to the bottom end of the rotating rod. The drive gear meshes with the driven screw. A threaded rod is rotatably connected to the inner cavity of the rotating rod. The top end of the threaded rod passes through the rotating rod and extends to the top of the rotating rod. The rotating rod is easy to operate manually or by an external mechanism. Through the meshing of the drive gear and the driven screw, efficient power transmission is achieved. The threaded rod can drive the movement of subsequent limiting components, providing a control means for fixing and unlocking the rotating rod.

[0014] Preferably, a square rod is screwed to the outer side of the threaded rod, the bottom of which extends into the interior of the rotating rod. Two limiting rods are fixedly connected to the outer side of the square rod. The limiting rods are located inside the limiting groove and engage with it. Rotation of the threaded rod can drive the square rod to move up and down, allowing the limiting rods to quickly engage or disengage from the limiting groove. This not only locks the position of the rotating rod to ensure adjustment accuracy but also allows for flexible unlocking for readjustment, making the operation convenient and the fixation reliable.

[0015] This utility model provides a hydraulic pump displacement adjustment mechanism, which has the following beneficial effects:

[0016] 1. This hydraulic pump displacement adjustment mechanism, through a downstream displacement adjustment mechanism, follows the natural flow direction of hydraulic oil, which can significantly reduce the oil flow resistance, avoid the eddies and pressure losses caused by traditional lateral obstruction, and significantly improve the energy conversion efficiency of the hydraulic pump; at the same time, by relying on the adjustment of the fit between the sealing pipe and the conical pile, the effective flow area of ​​the oil can be precisely changed, so as to achieve linear and precise displacement control and meet the flow requirements under different working conditions.

[0017] 2. This hydraulic pump displacement adjustment mechanism, through a rotating rod locking mechanism, securely fixes the adjusted rotating rod by firmly engaging the limit lever with the limit groove. This effectively prevents the rotating rod from shifting due to hydraulic pump vibration, thus preventing unexpected changes in displacement and ensuring continuous system stability. Operationally, simply rotating the threaded rod drives the square rod to rise and fall, enabling quick locking and unlocking of the limit lever without the need for complex tools. This balances the convenience of daily adjustment with the need for rapid adjustment in emergencies. Simultaneously, the locked state prevents unintended rotation of the rotating rod, drive gear, and driven screw. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention when the displacement is increased;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention when the displacement is reduced;

[0020] Figure 3 This is a cross-sectional view of the rotating rod locking mechanism of this utility model when locked.

[0021] Figure 4 This is a cross-sectional view of the rotating rod locking mechanism of this utility model when it is unlocked;

[0022] [Explanation of Key Component Symbols]

[0023] 1. Pipe body; 101. Mounting bracket; 102. First through groove; 103. Conical pile;

[0024] 2. Fixing bracket; 201. Second through groove; 202. Sealing tube; 203. Angled fitting groove;

[0025] 3. Installation chamber; 301. Gear driven screw; 302. Threaded sleeve;

[0026] 4. Sealing sleeve;

[0027] 5. Limiting sleeve; 501. Limiting groove;

[0028] 6. Rotating rod; 601. Drive gear; 602. Threaded rod;

[0029] 7. Square rod; 701. Limiting lever. Detailed Implementation

[0030] This utility model provides a hydraulic pump displacement adjustment mechanism.

[0031] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The device includes a pipe body 1, an installation bracket 101 fixedly connected to the inner wall of the pipe body 1, two first through slots 102 opened on one side of the installation bracket 101, a tapered pile 103 fixedly connected to one side of the installation bracket 101, a fixing bracket 2 fixedly connected to the inner wall of the pipe body 1, the fixing bracket 2 being slidably connected to the pipe body 1, and two second through slots 201 opened on one side of the fixing bracket 2.

[0032] Please refer to it again. Figure 1 and Figure 2A fitting and sealing tube 202 is fixedly connected to one side of the fixing frame 2. A sloping fitting groove 203 is opened on one side of the fitting and sealing tube 202. The sloping fitting groove 203 fits with the conical pile 103. An installation chamber 3 is fixedly connected between the inner walls of the tube body 1. A gear driven screw 301 is rotatably connected to the inner wall of the installation chamber 3. One end of the gear driven screw 301 passes through the installation chamber 3 and extends to the outside of the installation chamber 3. A threaded sleeve 302 is screwed to the outside of the gear driven screw 301. One end of the threaded sleeve 302 is fixedly connected to the fixing frame 2. A sealing sleeve 4 is fixedly connected to one side of the installation chamber 3. The sealing sleeve 4 is located outside the gear driven screw 301. One end of the sealing sleeve 4 extends into the inside of the threaded sleeve 302.

[0033] When the driven screw 301 is driven to rotate, the rotational motion is converted into linear motion of the threaded sleeve 302 through its screw engagement with the threaded sleeve 302, thereby driving the fixed frame 2 to slide along the inner wall of the tube body 1. As the fixed frame 2 moves, it simultaneously moves the sealing tube 202 closer to or further away from the tapered post 103 on the mounting bracket 101. The degree of contact between the inclined groove 203 and the tapered post 103 adjusts the size of the flow gap between them. At this time, hydraulic oil can flow smoothly through the first through groove 102 of the mounting bracket 101 and the second through groove 201 of the fixed frame 2. The change in the flow gap directly affects the effective flow area of ​​the hydraulic oil, thereby achieving precise adjustment of the hydraulic pump displacement. The sealing sleeve 4 isolates the hydraulic oil from the transmission components during the adjustment process, ensuring the stable operation of the adjustment mechanism.

[0034] Example 2, please refer to again. Figure 1 , Figure 3 and Figure 4 A limiting sleeve 5 is fixedly connected to the outer side of the tube body 1. Two limiting grooves 501 are opened on the outer side of the limiting sleeve 5. A rotating rod 6 is rotatably connected to the outer side of the tube body 1. The bottom end of the rotating rod 6 passes through the tube body 1 and the installation chamber 3 and extends into the inner cavity of the installation chamber 3. A drive gear 601 is fixedly connected to the bottom end of the rotating rod 6. The drive gear 601 is meshed with the gear driven screw 301. A threaded rod 602 is rotatably connected to the inner cavity of the rotating rod 6. The top end of the threaded rod 602 passes through the rotating rod 6 and extends to the top of the rotating rod 6. A square rod 7 is screwed to the outer side of the threaded rod 602. The bottom of the square rod 7 extends into the interior of the rotating rod 6. Two limiting rods 701 are fixedly connected to the outer side of the square rod 7. The limiting rods 701 are located inside the limiting grooves 501 and are engaged with the limiting grooves 501.

[0035] When adjustment of the rotating rod 6 is required, rotating the threaded rod 602 causes the square rod 7 to move upward along the inner cavity of the rotating rod 6. The limiting lever 701 on the outer side of the square rod 7 then disengages from the limiting groove 501 of the limiting sleeve 5, releasing the lock on the rotating rod 6. At this time, the rotating rod 6 drives the driven screw 301 to rotate via the bottom drive gear 601, thus achieving displacement adjustment. After adjustment, rotating the threaded rod 602 in the opposite direction causes the square rod 7 to move downward, prompting the limiting lever 701 to re-engage into the limiting groove 501. The mechanical locking structure firmly fixes the rotating rod 6, preventing unexpected rotation due to vibrations from the hydraulic pump, thereby ensuring the stable maintenance of the displacement adjustment state.

[0036] Working principle: When the driven screw 301 is driven to rotate, the rotational motion is converted into linear motion of the threaded sleeve 302 through its screw engagement with the threaded sleeve 302, thereby driving the fixed frame 2 to slide along the inner wall of the tube body 1. When the fixed frame 2 moves, it simultaneously moves the sealing tube 202 closer to or further away from the conical post 103 on the mounting frame 101. The size of the flow gap formed between the inclined groove 203 and the conical post 103 is adjusted by changing the degree of contact between them. At this time, hydraulic oil can pass through the first through groove 102 of the mounting frame 101 and the second through groove 201 of the fixed frame 2 in the forward direction. The change in the flow gap directly affects the effective flow area of ​​the hydraulic oil, thereby achieving precise adjustment of the hydraulic pump displacement. The sealing sleeve 4 isolates the hydraulic oil from the transmission components during adjustment, ensuring the stable operation of the adjustment mechanism. When the rotating rod 6 needs adjustment, the threaded rod 602 is rotated to move the square rod 7 upward along the inner cavity of the rotating rod 6. The limiting lever 701 on the outer side of the square rod 7 then disengages from the limiting groove 501 of the limiting sleeve 5, releasing the lock on the rotating rod 6. At this time, the rotating rod 6 drives the driven screw 301 to rotate through the bottom drive gear 601, realizing the displacement adjustment. After the adjustment is completed, the threaded rod 602 is rotated in the opposite direction to move the square rod 7 downward, causing the limiting lever 701 to re-engage into the limiting groove 501. The mechanical locking structure firmly fixes the rotating rod 6, preventing it from rotating unexpectedly due to the vibration of the hydraulic pump, thereby ensuring the stable maintenance of the displacement adjustment state.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pump displacement adjustment mechanism, comprising a pipe body (1), characterized in that: The inner wall of the tube (1) is fixedly connected to a mounting bracket (101), and two first through slots (102) are opened on one side of the mounting bracket (101). A tapered pile (103) is fixedly connected to one side of the mounting bracket (101). The inner wall of the tube (1) is fixedly connected to a fixing frame (2), which is slidably connected to the tube (1). Two second through slots (201) are opened on one side of the fixing frame (2).

2. The hydraulic pump displacement adjustment mechanism according to claim 1, characterized in that: The fixing frame (2) is fixedly connected to a sealing tube (202) on one side. A sloping sealing groove (203) is provided on one side of the sealing tube (202), and the sloping sealing groove (203) is in contact with the tapered pile (103).

3. The hydraulic pump displacement adjustment mechanism according to claim 2, characterized in that: An installation chamber (3) is fixedly connected between the inner walls of the tube body (1). A gear driven screw (301) is rotatably connected to the inner wall of the installation chamber (3). One end of the gear driven screw (301) passes through the installation chamber (3) and extends to the outside of the installation chamber (3).

4. The hydraulic pump displacement adjustment mechanism according to claim 3, characterized in that: A threaded sleeve (302) is screwed onto the outer side of the gear driven screw (301), and one end of the threaded sleeve (302) is fixedly connected to the fixing frame (2).

5. The hydraulic pump displacement adjustment mechanism according to claim 4, characterized in that: A sealing sleeve (4) is fixedly connected to one side of the installation chamber (3). The sealing sleeve (4) is located outside the gear driven screw (301), and one end of the sealing sleeve (4) extends into the interior of the threaded sleeve (302).

6. The hydraulic pump displacement adjustment mechanism according to claim 5, characterized in that: A limiting sleeve (5) is fixedly connected to the outside of the tube body (1), and two limiting grooves (501) are opened on the outside of the limiting sleeve (5).

7. A hydraulic pump displacement adjusting mechanism according to claim 6, characterized in that: A rotating rod (6) is rotatably connected to the outside of the tube (1). The bottom end of the rotating rod (6) passes through the tube (1) and the installation chamber (3) and extends into the inner cavity of the installation chamber (3). A drive gear (601) is fixedly connected to the bottom end of the rotating rod (6). The drive gear (601) meshes with the gear driven screw (301). A threaded rod (602) is rotatably connected to the inner cavity of the rotating rod (6). The top end of the threaded rod (602) passes through the rotating rod (6) and extends to the top of the rotating rod (6).

8. The hydraulic pump displacement adjustment mechanism according to claim 7, characterized in that: A square rod (7) is screwed onto the outer side of the threaded rod (602). The bottom of the square rod (7) extends into the interior of the rotating rod (6). Two limiting rods (701) are fixedly connected to the outer side of the square rod (7). The limiting rods (701) are located inside the limiting groove (501) and are engaged with the limiting groove (501).

Images