A swing structure of variable displacement double pump

Abstract

The present invention discloses a rocking structure for a variable displacement dual pump, comprising a rocking body, which comprises a rocking plate and a rocking arm integrally connected to the plate. Positioning cylinders are symmetrically formed on the circumference of the rocking plate, and bearing assembly holes are machined into the positioning cylinders for rocking positioning. A first circular thrust surface is formed on the back of the rocking plate, and a second circular thrust surface is formed on the front of the rocking plate. The first and second circular thrust surfaces are eccentrically arranged. A first axial hole with a crescent-shaped table is formed in the center of the first circular thrust surface, and a second axial hole with a crescent-shaped table is formed in the center of the second circular thrust surface. Using this rocking structure, a single pump can have one oil inlet and two oil outlets, thereby reducing the number of components such as flanges and sleeves in the series pumps, and reducing the overall weight and volume of the pumps.

Description

Technical Field

[0001] The present invention relates to the technical field of variable displacement double pumps, in particular to a swing structure of a variable displacement double pump. Background Art

[0002] In existing technology, most hydraulic pumps have a single oil inlet and an outlet. When a machine requires two outlets to control different loads, two pumps are often simply connected in series using flanges and sleeves. This creates two oil inlets and two outlets. Using two pumps in series is not only bulky and space-consuming, but also heavy. However, if a single pump is desired, the pump's swing mechanism needs to be optimized. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a swing structure for a variable dual pump in response to the current status of the above-mentioned prior art. By using this swing structure, one oil inlet and two oil outlets can be realized in one pump, thereby reducing the flanges, sleeves and other components of the serial pumps and reducing the overall weight and volume of the pump.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A swing structure for a variable displacement double pump comprises a swing body, which is composed of a swing plate and a swing arm integrally connected to the swing plate; positioning cylinders are formed symmetrically on the circumference of the swing plate, and bearing assembly holes are machined in the positioning cylinders for positioning the swing; a concave first circular thrust surface is formed on the back of the swing plate, and a concave second circular thrust surface is formed on the front of the swing plate; the first circular thrust surface and the second circular thrust surface are eccentrically arranged; a first axial hole with a crescent-shaped table is formed in the center of the first circular thrust surface, and a second axial hole with a crescent-shaped table is formed in the center of the second circular thrust surface.

[0006] To optimize the above technical solutions, specific measures taken also include:

[0007] The positioning cylinder and the rocking arm are arranged on the rocking plate at a 90-degree circumferential distance.

[0008] The back of the rocking arm is formed with a first variable action surface for top-jointing with the first variable mechanism, and the front of the rocking arm is formed with a second variable action surface for top-jointing with the second variable mechanism.

[0009] The outer peripheries of the first circular thrust surface and the second circular thrust surface are both formed with arc-shaped surrounding edges.

[0010] A rolling bearing is positioned and installed in the bearing assembly hole, and the inner circle of the rolling bearing is tightly fitted with the positioning shaft; the swing body can swing with the axis of the positioning shaft as the rotation axis through the rolling bearing.

[0011] Compared to the prior art, the present invention features symmetrical positioning cylinders formed on the wobble plate of the wobble body. Both cylinders are machined with bearing mounting holes for swing positioning. Furthermore, circular thrust surfaces, namely a first and a second circular thrust surface, are formed on both the back and front sides of the wobble plate. These two surfaces enable head-to-head mounting of two rotor assemblies, each corresponding to a corresponding oil outlet. Furthermore, the wobble arm of the wobble body features a first variable action surface that engages with the first variable mechanism and a second variable action surface that engages with the second variable mechanism. The variable mechanisms acting on these two surfaces enable stepless adjustment of the pump displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 yes Figure 1 Cross-sectional view along the AA axis;

[0014] Figure 3 yes Figure 1 Cross-sectional view along the BB direction;

[0015] Figure 4 It is a schematic diagram of the assembly of the present invention and the pump rotor assembly;

[0016] Figure 5 yes Figure 4 Top view of . DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0018] Figures 1 to 5 It is a schematic diagram of the structure and assembly of the present invention.

[0019] The figures are as follows: crescent-shaped table T, swing body 1, swing plate 2, first circular thrust surface 21, first axial hole 21a, second circular thrust surface 22, second axial hole 22a, swing arm 3, first variable action surface 31, second variable action surface 32, positioning cylinder 4, bearing assembly hole 4a, arc-shaped edge 5, first variable mechanism 61, second variable mechanism 62, positioning shaft 7, rotor assembly 81, rotor assembly 82.

[0020] like Figures 1 to 3As shown, the present invention discloses a swing structure of a variable dual pump. The use of this swing structure can realize one oil inlet and two oil outlets in one pump, reducing the problems of the traditional two pumps requiring flanges and sleeve components to be connected in series, as well as the large size, heavy weight and two oil inlets.

[0021] The swing structure of the variable dual pump of the present invention includes a swing body 1, and the swing body 1 is composed of a swing plate 2 and a swing arm 3 integrally connected to the swing plate 2. Positioning cylinders 4 are formed symmetrically on the circumference of the swing plate 2, and bearing assembly holes 4a are processed in the positioning cylinders 4. The bearing assembly holes 4a in the two positioning cylinders 4 correspond to each other coaxially, and the bearing assembly holes 4a are used to install rolling bearings for swing positioning. A concave circular thrust surface is processed on the back and front of the swing plate 2, and the two circular thrust surfaces can realize the head-to-head installation of two sets of rotor assemblies. For the convenience of description, we define the circular thrust surface formed on the back of the swing plate 2 as the first circular thrust surface 21, and the circular thrust surface formed on the front of the swing plate 2 as the second circular thrust surface 22. By Figure 1 and Figure 3 As can be seen, the first circular thrust surface 21 and the second circular thrust surface 22 are eccentrically disposed. A first axial hole 21a is formed in the center of the first circular thrust surface 21, and a second axial hole 22a is formed in the center of the second circular thrust surface 22. Because the first and second axial holes 21a, 22a are not completely through-holes and are eccentric, each of the first and second axial holes 21a, 22a has a crescent-shaped bottom surface, which forms a crescent-shaped table surface T.

[0022] like Figure 3 As shown, the back and front sides of the rocking arm 3 of the present invention are each formed with a variable action surface for the variable mechanism to act on. The variable mechanism can drive the rocking body 1 to swing by the force acting on these two variable action surfaces, thereby achieving stepless adjustment of the pump displacement. Figure 4 and Figure 5 As shown, for ease of understanding, we also define the variable action surface formed on the back of the rocking arm 3 as the first variable action surface 31, and the variable mechanism acting on the first variable action surface 31 as the first variable mechanism 61. The variable action surface formed on the front of the rocking arm 3 is defined as the second variable action surface 32, and the variable mechanism acting on the second variable action surface 32 is defined as the second variable mechanism 62.

[0023] In the embodiment, the inner circle of the rolling bearing installed in the bearing assembly hole 4a can be tightly fitted with the positioning shaft 7. Through the rotational support of the rolling bearing and the positioning shaft 7, the swing structure of the present invention can be more stable when swinging, and the swing body 1 can swing within a certain range with the axis of the positioning shaft 7 as the rotation axis.

[0024] In the embodiment, Figure 1 It can be seen that the positioning cylinder 4 and the rocking arm 3 of the present invention are arranged on the rocking plate 2 at a 90-degree circumferential distance.

[0025] In the embodiment, the outer periphery of the first circular thrust surface 21 and the outer periphery of the second circular thrust surface 22 are both formed with an arc-shaped surrounding edge 5 .

[0026] The rocking structure of the present invention features two coaxially formed holes for rocking positioning bearings. Furthermore, it also features two circular thrust surfaces, enabling end-to-end mounting of two rotor assemblies. Each rotor assembly corresponds to an oil outlet and shares a single oil inlet. The rocking arm 3 of the rocking structure has two variable action surfaces. The variable action mechanism acts on these two surfaces, enabling infinitely variable pump displacement.

[0027] The best embodiment of the present invention has been described, and various changes or modifications can be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A swing structure of a variable displacement double pump, comprising a swing body (1), wherein the swing body (1) is composed of a swing plate (2) and a swing arm (3) integrally connected to the swing plate (2); wherein the swing structure comprises: The circumference of the swing plate (2) is symmetrically formed with a positioning cylinder (4), and the positioning cylinder (4) is processed with a bearing assembly hole (4a) for swing positioning; the back of the swing plate (2) is formed with a concave first circular thrust surface (21), and the front of the swing plate (2) is formed with a concave second circular thrust surface (22); the first circular thrust surface (21) and the second circular thrust surface (22) are eccentrically arranged; the center of the first circular thrust surface (21) is formed with a first axial hole (21a) with a crescent-shaped table (T), and the center of the second circular thrust surface (22) is formed with a second axial hole (22a) with a crescent-shaped table (T); The back surface of the rocking arm (3) is formed with a first variable action surface (31) for top-jointing with the first variable mechanism (61), and the front surface of the rocking arm (3) is formed with a second variable action surface (32) for top-jointing with the second variable mechanism (62); The outer periphery of the first circular thrust surface (21) and the outer periphery of the second circular thrust surface (22) are both formed with an arc-shaped surrounding edge (5).

2. The swing structure of a variable displacement double pump according to claim 1, characterized in that: A rolling bearing is positioned and installed in the bearing assembly hole (4a), and the inner circle of the rolling bearing is tightly fitted with the positioning shaft (7); the swing body (1) can swing with the axis of the positioning shaft (7) as the rotation axis through the rolling bearing.

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