A plunger pump

Abstract

This utility model discloses a plunger pump, which includes a housing containing a swashplate. The swashplate is rotatably connected within the housing. A first control lever and a second control lever, moving in opposite directions, are symmetrically arranged along the center of the swashplate. One end of each control lever is connected to the swashplate. When the first control lever moves towards the swashplate, the second control lever moves away from the swashplate to adjust its angle. By using the first and second control levers, along with corresponding rack and pinion structures, reverse driving is achieved to adjust the swashplate angle. The use of graduated components and their splined sections and keyways ensures high precision, ease of operation, and intuitive status indication for swashplate angle adjustment.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and in particular to a plunger pump. Background Technology

[0002] As a core power component of hydraulic systems, the swashplate piston pump's output displacement is directly determined by the swashplate angle. Traditional swashplate structures mostly employ a fixed angle design, making it impossible to dynamically adjust the flow rate according to operating conditions, resulting in low system efficiency. Although adjustable swashplates have emerged in recent years, operators still find it difficult to adjust them at any time. Furthermore, the lack of angle measurement benchmarks forces operators to rely solely on experience to estimate the angle, leading to excessive deviations in flow control. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a plunger pump.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a plunger pump, including a housing, wherein the housing includes a swashplate, the swashplate being rotatably connected in the housing, and a first control rod and a second control rod that move in opposite directions are symmetrically arranged along the center of the swashplate, one end of the first control rod and the second control rod being connected to the swashplate, and when the first control rod moves toward the swashplate, the second control rod moves away from the swashplate to adjust the angle of the swashplate.

[0005] In the above scheme, preferably, the other ends of the first control lever and the second control lever are sealed through the outer shell and connected to the control box, and the tilting of the swashplate is controlled by the control unit in the control box.

[0006] In the above scheme, preferably, the control unit includes a first rack, a second rack, and a gear. The first rack is connected to a first control lever, the second rack is connected to a second control lever, and the first rack and the second rack are parallel and respectively located on both sides of the gear.

[0007] In the above scheme, preferably, the first rack and the second rack are connected to the first control rod and the second control rod respectively through sleeves.

[0008] In the above scheme, preferably, the sleeve is slidably connected to the control box.

[0009] In the above scheme, preferably, a spherical connector is provided extending from the center of the back side of the swashplate, and the connector is rotatably connected to the outer casing.

[0010] In the above scheme, it is preferred that the center of the gear is adapted to the center of the connector.

[0011] In the above scheme, preferably, a plurality of plunger rods are provided in the outer shell, and one end of each plunger rod is provided with a universal ball embedded in the swashplate.

[0012] In the above scheme, preferably, a rotating rod is provided through the gear, the rotating rod passes through the outer shell and is connected to the scale component, the scale component includes a scale ring and a rotating knob, and the rotating knob is rotatably disposed in the scale ring.

[0013] The scale ring has a keyway section at its bottom and a spline section on the corresponding rotary knob. A spring is provided between the rotary knob and the scale ring. When the spring is in a stationary state, the rotary knob is limited within the scale ring.

[0014] The beneficial effects of this invention are as follows: by setting a first control lever and a second control lever, and cooperating with the corresponding rack and gear structure, reverse drive is achieved to adjust the angle of the swashplate. Combined with the graduated component and its splined section and keyway end, high precision, ease of operation, and intuitive status indication are achieved in swashplate angle adjustment. Attached Figure Description

[0015] Figure 1 This is the bottom view of the present invention.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 3 for Figure 2 Enlarged view of point A.

[0018] Figure 4 This is a schematic diagram of the scale component of this utility model.

[0019] Figure 5 This is a schematic diagram of the internal structure of the scale component of this utility model.

[0020] Figure 6 This is a structural diagram of the internal structure of the scale component of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-6 A plunger pump includes a housing 1. Inside the housing 1, a swashplate 2 for adjusting the flow rate of the plunger pump is provided. The swashplate 2 is rotatably connected to the inside of the housing 1 via a spherical connector 10 extending from the center of its back side. Specifically, the spherical connector 10 is embedded and supported in a spherical bearing seat correspondingly provided on the inner wall of the housing 1, so that the swashplate 2 can swing freely around its center point within a certain angle range, and the swashplate 2 can also rotate after adjusting the inclination.

[0022] A first control lever 3 and a second control lever 4 are symmetrically arranged on the back of the swashplate 2 and along its center. These two control levers are moved in opposite directions to adjust the angle of the swashplate 2. Specifically, when the first control lever 3 is pushed towards the center of the swashplate 2, the second control lever 4 is simultaneously pulled away from the center of the swashplate 2. This opposing linear movement forces the swashplate 2 to tilt around its spherical connector 10, thereby changing its tilt angle.

[0023] The other ends of the first control lever 3 and the second control lever 4 are sealed through the wall of the outer casing 1 and extend into a control box 5 fixed to the outside of the outer casing 1. A control unit is disposed within the control box 5, which controls the movement of the first control lever 3 and the second control lever 4.

[0024] Specifically, the control unit includes a gear 8, a first rack 6, and a second rack 7. The first rack 6 is fixedly connected to the end of a first control rod 3 extending into the control box 5, and the second rack 7 is fixedly connected to the end of a second control rod 4 extending into the control box 5. That is, the first rack 6 and the second rack 7 are respectively connected to the ends of the corresponding first control rod 3 and second control rod 4 through a sleeve 9. The sleeve 9 is slidably installed in a groove provided on the inner wall of the control box 5, providing stable support and guidance for the movement of the racks and control rods.

[0025] Meanwhile, the first rack 6 and the second rack 7 are arranged in parallel and located on both sides of the gear 8, and are simultaneously meshed with the gear 8. This ensures that when the gear 8 rotates, the first rack 6 and the second rack 7 move in opposite directions at equal distances, thereby driving the first control lever 3 and the second control lever 4 to perform the required opposite movements, and finally achieving the tilt adjustment of the swashplate 2.

[0026] Meanwhile, the central axis of the gear 8 is preferably adapted to the rotational central axis of the spherical connector 10 on the back side of the swashplate 2, which helps to transmit force more directly and reduce unnecessary torque.

[0027] Inside the outer casing 1, multiple plunger cavities are arranged circumferentially around the swashplate 2. Each plunger cavity contains a plunger rod 11. A universal ball joint 12 is mounted at one end of each plunger rod 11, and the universal ball joint 12 is embedded in a corresponding socket on the end face of the swashplate 2. When the tilt angle of the swashplate 2 changes, the plunger rod 11 rotates with the cylinder block, and the universal ball joint 12 at its end slides on the swashplate 2, thus causing a corresponding reciprocating motion change in the plunger rod 11 within the cavity, thereby adjusting the pump displacement.

[0028] To facilitate operation and precise indication of the swashplate 2 angle, a rotating rod 13 is fixedly mounted at the center of the gear 8 of the control unit. The rotating rod 13 extends outwards, sealingly passing through the control box 5 and the outer casing 1. On the outside of the casing 1, a scale element is connected to the end of the rotating rod 13. The scale element includes a scale ring 14 fixedly mounted on the outside of the control box 5 and a rotating knob 15 coaxially sleeved on the end of the rotating rod 13. The scale ring 14 is engraved with graduations indicating the swashplate 2 angle and the corresponding displacement.

[0029] A splined section 16 is provided on the side of the rotary knob 15 near the scale ring 14. Correspondingly, a keyway section 17 is provided on the bottom end face of the scale ring 14 facing the rotary knob 15. A compression spring 18 is installed between the rotary knob 15 and the scale ring 14. In the natural resting state of the spring 18, the splined section 16 of the rotary knob 15 engages and locks with the keyway section 17 at the bottom of the scale ring 14 under the elastic force of the spring 18. At this time, the rotary knob 15 cannot rotate relative to the scale ring 14, thereby locking the swashplate 2 at the current angle position.

[0030] When adjusting the angle of the swashplate 2, the operator needs to pull the rotary knob 15 outward along the axial direction to overcome the elastic force of the spring 18, causing the spline section 16 of the rotary knob 15 to disengage from the keyway section 17 of the scale ring 14. After disengaging from the locked state, the operator can freely rotate the rotary knob 15. Furthermore, a movable plate 19 is provided in the scale ring 14, and the spring 18 is disposed on the movable plate 19, which is rotatably connected to the scale ring 14.

[0031] Rotating knob 15 directly drives gear 8 inside control box 5 via rotating rod 13. Gear 8 then drives first rack 6 and second rack 7 to perform synchronous and opposite linear motion, ultimately adjusting the tilt angle of swashplate 2 precisely via first control rod 3 and second control rod 4. After adjusting to the desired angle, releasing knob 15 causes spring 18 to push knob 15 back to its original position, re-engaging its spline segment 16 into the corresponding position of keyway segment 17 on scale ring 14, thus locking it in place. At this point, the scale value on scale ring 14 aligned with the indicator mark on knob 15 indicates the current angle of swashplate 2 or pump displacement.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piston pump characterized by: The application relates to a swash plate control device, which comprises a shell (1), wherein the shell (1) comprises a swash plate (2) which is rotatably connected in the shell (1), and wherein a first control rod (3) and a second control rod (4) are arranged on the swash plate (2) in a center-symmetrical manner and move in opposite directions, and wherein one end of the first control rod (3) and the second control rod (4) is connected to the swash plate (2), and wherein when the first control rod (3) moves towards the swash plate (2), the second control rod (4) moves away from the swash plate (2) to adjust the angle of the swash plate (2).

2. A piston pump according to claim 1, characterized in that: The other end of the first control rod (3) and the second control rod (4) is sealed through the shell (1) and connected in a control box (5), and the swash plate (2) is controlled to tilt through a control unit in the control box (5).

3. A piston pump according to claim 2, characterized in that: The control unit comprises a first rack (6), a second rack (7) and a gear (8), the first rack (6) is connected to the first control rod (3), the second rack (7) is connected to the second control rod (4), and the first rack (6) and the second rack (7) are parallel and arranged on both sides of the gear (8).

4. A piston pump according to claim 3, characterized in that: The first rack (6) and the second rack (7) are connected to the first control rod (3) and the second control rod (4) through a sleeve (9) respectively.

5. A piston pump according to claim 4, characterized in that: The sleeve (9) is slidingly connected in the control box (5).

6. A piston pump according to claim 5, characterized in that: A spherical connector (10) is arranged on the back side of the swash plate (2) and extends in the center, and the connector (10) is rotatably connected in the shell (1).

7. A piston pump according to claim 6, characterized in that: The center of the gear (8) is adapted to the center of the connector (10).

8. A piston pump according to claim 1, characterized in that: A plurality of plunger rods (11) are arranged in the shell (1), and one end of the plunger rod (11) is provided with a universal ball (12) embedded in the swash plate (2).

9. A piston pump according to claim 4, characterized in that: A rotating rod (13) is arranged through the gear (8), and the rotating rod (13) is connected with a scale element through the shell (1), the scale element comprises a scale ring (14) and a rotating knob (15), and the rotating knob (15) is rotatably arranged in the scale ring (14).

10. A piston pump according to claim 9, characterized in that: A key groove section (17) is arranged at the bottom of the scale ring (14), a spline section (16) is arranged on the rotating knob (15), a spring (18) is arranged between the rotating knob (15) and the scale ring (14), the spring (18) is in a static state, and the rotating knob (15) is limited in the scale ring (14).

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