Variable feedback mechanism

Abstract

The utility model relates to a variable feedback mechanism which comprises a shell which is installed in a path of an oil duct and used for arranging the oil duct. The working mechanism is installed in an inner cavity of the shell and used for flow control and feedback, the working mechanism comprises a control assembly, a moving assembly and a linkage assembly, the control assembly is installed in the inner cavity of the shell and used for controlling whether an oil way is communicated or not, and the moving assembly is installed on one side of the control assembly and used for controlling position change of the assembly; the linkage assembly is installed on one side of the control assembly and used for being matched with the moving assembly to change the position and direction of the control assembly. The variable feedback mechanism has the beneficial effects that the variable feedback mechanism adopts a modular design, the matching relationship among all parts is clear, the manufacturing difficulty and cost are reduced, and meanwhile, the simple structure also facilitates later maintenance; in addition, through precise mechanical cooperation and oil way control, the mechanism can achieve precise adjustment of the displacement of the plunger pump.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a variable feedback mechanism. Background Art

[0002] In the field of fluid transmission technology, as an important fluid transmission power source, the piston pump is widely used in various fields such as construction machinery, petroleum, chemical industry, metallurgy, and electric power. With the rapid development of these industries, the requirements for fluid control accuracy and efficiency are also increasing day by day. The performance of the piston pump, especially the accuracy and response speed of its displacement control, directly determines the stability and working efficiency of the entire fluid transmission system.

[0003] Traditional piston pump displacement control methods often rely on complex electronic control systems and sensors to measure and feedback parameters such as fluid pressure and flow rate to achieve displacement control. However, this solution will result in complex designs for some mechanisms, with high manufacturing and maintenance costs. While some design mechanisms are simple in structure, their adjustment accuracy and response speed are limited and cannot meet the application requirements of high precision and high response speed. Especially in application scenarios such as construction machinery that require fast response and high reliability, these problems are particularly prominent. The utility model designs a variable feedback mechanism to solve the above problems. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the utility model provides a variable feedback mechanism, which solves the technical problems of complex structure and low precision.

[0006] (II) Technical Solutions

[0007] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0008] An embodiment of the utility model provides a variable feedback mechanism, including:

[0009] A housing, which is installed in the path of the oil passage for the layout of the oil passage;

[0010] A working mechanism, which is installed in the inner cavity of the housing and is used for flow control and feedback. The working mechanism includes a control component, a moving component, and a linkage component. The control component is installed in the inner cavity of the housing and is used to control the opening and closing of the oil circuit. The moving component is installed on one side of the control component and is used to change the position of the control component. The linkage component is installed on one side of the control component and is used to cooperate with the moving component to realize the change of the position and direction of the control component.

[0011] Optionally, the control component includes a control valve sleeve installed in the inner cavity of the housing, which is used to receive the feedback signal and rotate to close the control oil circuit. A control valve core for rotating to make the control oil circuit unblocked is installed in the inner cavity of the control valve sleeve.

[0012] Optionally, the moving component includes a variable piston assembly slidably connected in the inner cavity of the housing, and the variable piston assembly can slide left and right in the inner cavity of the housing.

[0013] Optionally, the linkage component includes a slider installed outside the variable piston assembly. The slider has the same motion state as the variable piston assembly. A connecting pin is installed at the bottom of the slider, and a feedback component is also installed on one side of the connecting pin.

[0014] Optionally, the feedback component includes a rotating seat installed on one side of the connecting pin, and a feedback pin is installed on one side of the rotating seat.

[0015] Optionally, one side of the feedback pin is in interference fit with the rotating seat, and the other side of the feedback pin is installed in the inner cavity of the U-shaped opening of the control valve sleeve with a clearance for cooperation.

[0016] (III) Beneficial effects

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, the variable feedback mechanism adopts a modular design, and the cooperation relationship between each component is clear, reducing the manufacturing difficulty and cost. At the same time, the simple structure also facilitates the later maintenance and repair; in addition, through precise mechanical cooperation and oil circuit control, this mechanism can achieve precise adjustment of the displacement of the plunger pump. In the present utility model, due to the adoption of the direct mechanical feedback method, it can quickly respond to the changes in the control system, timely block the flow of the pilot oil, so as to ensure that the variable piston assembly stops moving quickly when needed. This fast response characteristic helps to improve the dynamic performance and stability of the system, and also avoids the system failure problem caused by oil circuit blockage or leakage through reasonable oil circuit layout and flow control. Description of the drawings

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1 of the variable feedback mechanism of the present utility model;

[0020] Figure 2 It is an internal cross-sectional view of the present utility model;

[0021] Figure 3 It is for the present utility model Figure 2 Enlarged view of part A;

[0022] Figure 4 It is an internal structural cross-sectional view of the present utility model.

[0023]

Explanation of the Attached Drawing Reference Signs

[0024] 1. Housing; 2. Control spool; 3. Control valve sleeve; 4. Variable piston assembly; 5. Slide block; 6. Connecting pin; 7. Rotating seat; 8. Feedback pin. Detailed Embodiment

[0025] For better explaining the present utility model for easier understanding, the present utility model will be described in detail below with reference to the attached drawings through specific embodiments. Among them, the orientation nouns such as "upper", "lower", etc. mentioned in this article are with reference to Figure 1 the defined orientation.

[0026] Regarding the problems of insufficient precision and complex structure proposed in the embodiment of the present utility model, this variable feedback mechanism adopts a modular design, the cooperation relationship between each component is clear, which reduces the manufacturing difficulty and cost. At the same time, the simple structure also facilitates the later maintenance and servicing; in addition, through precise mechanical cooperation and oil circuit control, this mechanism can achieve precise adjustment of the displacement of the plunger pump.

[0027] In order to better understand the above technical solution, the exemplary embodiments of the present utility model will be described in more detail below with reference to the attached drawings. Although the exemplary embodiments of the present utility model are shown in the attached drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present utility model and to convey the scope of the present utility model completely to those skilled in the art.

[0028] Embodiment 1:

[0029] Referring to Figures 1 - 3 , a variable feedback mechanism includes:

[0030] A housing 1, which is installed in the path of the oil passage for the layout of the oil passage;

[0031] A working mechanism, which is installed in the inner cavity of the housing 1 and is used for flow control and feedback. The working mechanism includes a control component, a moving component and a linkage component. The control component is installed in the inner cavity of the housing 1 and is used for controlling the opening and closing of the oil circuit. The moving component is installed on one side of the control component and is used for changing the position of the control component. The linkage component is installed on one side of the control component and is used to cooperate with the moving component to realize the change of the position and direction of the control component.

[0032] The control component includes a control valve sleeve 3 installed in the inner cavity of the housing 1, which is used for receiving the feedback signal and rotating to close the control oil circuit. A control spool 2 for rotating to control the opening of the control oil circuit is installed in the inner cavity of the control valve sleeve 3.

[0033] In the embodiment of the utility model, through the rotational movement of the control valve core 2, the pilot oil (entering from the K port) is guided through the gap between the control valve core 2 and the control valve sleeve 3, and flows into the oil channel inside the housing 1. The pilot oil enters one side (left or right) of the variable piston assembly 4, pushing it to move left or right. The movement of the variable piston assembly 4 directly reflects the change in the displacement of the plunger pump, and at this time, the slider 5 and the rotating seat 7 will be linked. The slider 5 that matches the gap on the outside of the variable piston assembly 4 moves with it. The slider 5 is connected to the rotating seat 7 through the connecting pin 6, so that the rotating seat 7 rotates with the inclined plate as the fulcrum. This rotational movement directly changes the displacement of the pump.

[0034] Embodiment 2:

[0035] Reference Figures 1 - 4 The moving assembly includes a variable piston assembly 4 slidably connected in the inner cavity of the housing 1, and the variable piston assembly 4 can slide left and right in the inner cavity of the housing 1. The linkage assembly includes a slider 5 installed on the outer side of the variable piston assembly 4, and the slider 5 maintains the same motion state as the variable piston assembly 4. A connecting pin 6 is installed at the bottom of the slider 5, and a feedback assembly is also installed on one side of the connecting pin 6.

[0036] The feedback assembly includes a rotating seat 7 installed on one side of the connecting pin 6, and a feedback pin 8 is installed on one side of the rotating seat 7. One side of the feedback pin 8 is assembled with the rotating seat 7 by interference fit, and the other side of the feedback pin 8 is gap-fitted into the inner cavity of the U-shaped opening of the control valve sleeve 3 for fit.

[0037] In the embodiment of the utility model, there is also interaction between the feedback pin 8 and the control valve sleeve 3. One side of the feedback pin 8 is interference fit with the rotating seat 7, and the other side is inserted into the U-shaped opening of the control valve sleeve 3. When the rotating seat 7 rotates, the feedback pin 8 also rotates, thereby rotating the control valve sleeve 3. As the control valve sleeve 3 rotates, the opening between it and the control valve core 2 gradually closes, thereby blocking the pilot oil from continuing to enter the corresponding side of the variable piston assembly 4, causing the variable piston assembly 4 to stop moving, and realizing fast-response variable feedback control.

[0038] In the description of the present utility model, it should be understood that 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present utility model, unless otherwise clearly specified or limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified or limited, when the first feature is "above" or "below" the second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or it merely means that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or it merely means that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A variable feedback mechanism, characterized in that: include: A housing (1), the housing (1) being installed in the path of the oil passage and used for arranging the oil passage; A working mechanism, the working mechanism is installed in the inner cavity of the housing (1) and is used for flow control and feedback, the working mechanism comprises a control component, a moving component and a linkage component, the control component is installed in the inner cavity of the housing (1) and is used to control whether the oil circuit is connected, the moving component is installed on one side of the control component and is used to change the position of the control component, and the linkage component is installed on one side of the control component and is used to cooperate with the moving component to achieve changes in the position and direction of the control component.

2. A variable feedback mechanism according to claim 1, characterized in that: The control assembly comprises a control valve sleeve (3) installed in the inner cavity of a housing (1) and used for receiving a feedback signal and rotating to close a control oil circuit. A control valve core (2) for rotating to open the control oil circuit is installed in the inner cavity of the control valve sleeve (3).

3. A variable feedback mechanism according to claim 1, characterized in that: The moving assembly comprises a variable piston assembly (4) slidably connected in the inner cavity of the housing (1); the variable piston assembly (4) can slide left and right in the inner cavity of the housing (1).

4. A variable feedback mechanism according to claim 1, characterized in that: The linkage assembly comprises a slider (5) installed on the outside of the variable piston assembly (4), the slider (5) and the variable piston assembly (4) maintain the same motion state, a connecting pin (6) is installed at the bottom of the slider (5), and a feedback assembly is also installed on one side of the connecting pin (6).

5. A variable feedback mechanism according to claim 4, characterized in that: The feedback assembly comprises a rotating seat (7) installed on one side of the connecting pin (6), and a feedback pin (8) is installed on one side of the rotating seat (7).

6. A variable feedback mechanism according to claim 5, characterized in that: One side of the feedback pin (8) is assembled with the rotating seat (7) by interference fit, and the other side of the feedback pin (8) is inserted into the inner cavity of the U-shaped opening of the control valve sleeve (3) for fit.

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