Three-point expansion core

Abstract

The utility model discloses a three-point expansion core relates to expansion core structure technical field, including expansion core mechanism, base mechanism and other parts, expansion core mechanism includes shell, the lower surface center of shell is provided with the inner groove, the inside of shell is provided with the upper cavity right above the inner groove, the inside of inner groove is provided with the lower plug that matches with it, and the lower plug is provided with the upper cavity right above the upper cavity. According to the device, oil is injected to the position below the piston, the piston is pushed to move through the oil, then all the movable cores are extruded to be away from one another, and therefore three-point core expanding operation is achieved, the core expanding amplitude can be controlled through the amount of injected oil, and movement of the movable cores can be better controlled through oil injection operation; according to the device, the lower plug is fixed in the shell through the base, during disassembly, only the rotary knob needs to be rotated to drive the winding rod to rotate, then the clamping pieces are driven to move out of the clamping grooves through the assembly, and therefore disassembly of the base becomes easy, and a worker can conveniently overhaul components in the inner grooves.

Description

Technical Field

[0001] This utility model relates to the field of core expansion technology, specifically a three-point core expansion method. Background Technology

[0002] Current industrial structures require a three-point expansion mechanism that allows three movable cores to move slightly away from each other. Because the expansion amplitude of the movable cores is small, ordinary electric actuators cannot control the slight expansion of the movable cores. There is also no suitable structure on the market that allows the three movable cores to expand slightly towards each other. Therefore, those skilled in the art have proposed a three-point expansion mechanism. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a three-point expansion core, which utilizes oil injection to drive the piston movement and cause the micro-expansion of each moving core, thus solving the problems mentioned above.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a three-point expansion core, comprising:

[0005] A core-expanding mechanism, used for performing core-expanding operations;

[0006] The core expansion mechanism includes a housing. An inner groove is formed at the center of the lower surface of the housing. An upper cavity is formed directly above the inner groove inside the housing. A lower plug adapted to the inner groove is disposed within the inner groove. A piston is disposed above the lower plug inside the inner groove. An upper rod extending into the upper cavity and having a conical upper end is mounted at the center of the upper surface of the piston. Three core grooves communicating with the upper cavity are formed on the side of the housing in a triangular shape. A movable core is disposed within each core groove. A rib groove is formed on the side of each movable core. Elastic ribs are disposed within multiple rib grooves. An arc-shaped groove adapted to the conical end of the upper rod is formed on the other side of each movable core. Multiple first injection ports are formed on the side and lower surface of the housing. A first channel communicating with the inner groove and each of the first injection ports is formed inside the housing. Multiple second injection ports are formed on the side and lower surface of the housing. A second channel communicating with the inner groove and each of the second injection ports is formed inside the housing.

[0007] The base mechanism is used to fix the lower plug inside the expansion mechanism.

[0008] As a further technical solution of this utility model, the piston and the upper rod are provided with a common mounting groove, and a mounting rod extending into the mounting groove is installed at the center of the upper surface of the lower plug.

[0009] As a further technical solution of this utility model, the upper rod, piston and lower plug are all provided with sealing grooves on their sides, and each sealing groove is provided with a matching sealing ring. The first channel and the inner groove connection port are located below the piston, and the second channel and the inner groove connection port are located above the piston.

[0010] As a further technical solution of this utility model, the base mechanism includes a base disposed at the port of the inner groove and fixedly connected to the lower plug. The inner wall of the inner groove is rectangular and has four slots. The interior of the base has a cavity on one side of each slot.

[0011] As a further technical solution of this utility model, a limiting plate is slidably arranged in each cavity, a spring is arranged on one side of the limiting plate in each cavity, and a card extending into the aligned card slot is installed at the center of the other side of each limiting plate.

[0012] As a further technical solution of this utility model, a central groove is provided in the center of the base, and a winding rod is rotatably installed in the center of the central groove. A pull rope with its end extending into the central groove and fixedly connected to the winding rod is installed on the center of the side of each limiting plate. A bottom groove is provided in the center of the lower surface of the base, and the lower end of the winding rod extends into the bottom groove and is equipped with a knob.

[0013] Beneficial effects

[0014] This invention provides a three-point expansion core. Compared with the prior art, it has the following advantages:

[0015] 1. A three-point core expansion device, wherein oil is injected below the piston, the oil pushes the piston to move, and then squeezes each movable core to move away from each other, thereby realizing the three-point core expansion operation. The expansion amplitude can be controlled by the amount of oil injected, and the oil injection operation can better control the movement of the movable core.

[0016] 2. A three-point expansion core device. This device uses a base to fix the lower plug inside the housing. When disassembling, simply rotate the knob to rotate the winding rod, and then the components will move each clip out of the slot. This makes the disassembly of the base simple and facilitates the maintenance of the components inside the slot by the staff. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a three-point expansion core structure;

[0018] Figure 2 A side view of a three-point expansion core;

[0019] Figure 3 A schematic diagram of the internal structure of a three-point expansion core;

[0020] Figure 4 This is a cross-sectional view of a three-point expansion core.

[0021] Figure 5 This is a disassembly diagram of a three-point expansion core.

[0022] Figure 6 This is a cross-sectional view of a base with a three-point expansion core.

[0023] In the diagram: 1. Shell; 2. Inner groove; 3. Upper cavity; 4. Lower plug; 5. Piston; 6. Upper rod; 7. Mounting rod; 8. Mounting groove; 9. Core groove; 10. Movable core; 11. Rib groove; 12. Elastic rib; 13. Arc groove; 14. Base; 15. Slot; 16. Cavity; 17. Limiting plate; 18. Spring; 19. Clamping element; 20. Center groove; 21. Winding rod; 22. Pull rope; 23. Bottom groove; 24. Knob; 25. First injection port; 26. First channel; 27. Second injection port; 28. Second channel; 29. ​​Sealing ring. Detailed Implementation

[0024] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0025] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0027] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0028] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0029] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0030] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0031] like Figure 1-6 As shown, a three-point expansion mechanism disclosed herein may include components such as an expansion mechanism and a base mechanism;

[0032] like Figure 1-4 As shown, it includes a housing 1, an inner groove 2, an upper cavity 3, a lower plug 4, a piston 5, an upper rod 6, a mounting rod 7, a mounting groove 8, a core groove 9, a movable core 10, a rib groove 11, an elastic rib 12, a first injection port 25, a first channel 26, a second injection port 27, a second channel 28, and a sealing ring 29.

[0033] The inner groove 2 begins at the center of the lower surface of the housing 1. The upper cavity 3 begins inside the housing 1, located on one side of the inner groove 2. The lower plug 4 is disposed within the inner groove 2. The piston 5 is disposed within the inner groove 2 and above the lower plug 4. The upper rod 6 is mounted at the center of the upper surface of the piston 5, with a conical end extending into the upper cavity 3. The mounting groove 8 is opened at the center of the lower surface of the piston 5. The mounting rod 7 is disposed within the mounting groove 8, with its lower end fixedly connected to the lower plug 4. Three core grooves 9 are evenly distributed on the side of the housing 1 and communicate with the upper cavity 3. Each movable core 10 is disposed within its corresponding core groove 9. Each of the aforementioned grooves 11 is formed on the side of the corresponding movable core 10. The elastic ribs 12 are arranged in the three grooves 11. The three first injection ports 25 are formed on the surface of the housing 1. The first channel 26 is formed inside the housing 1 and communicates with the first injection port 25 and the inner groove 2. The three second injection ports 27 are formed on the surface of the housing 1. The second channel 28 is formed inside the housing 1 and communicates with the second injection port 27 and the inner groove 2. The upper rod 6, the lower plug 4 and the piston 5 are all provided with sealing grooves on their sides. Each of the aforementioned sealing rings 29 is respectively arranged in the corresponding sealing groove.

[0034] During core expansion, oil is injected into the first injection port 25. The oil enters the inner groove 2 through the first channel 26 and is positioned below the piston 5. As more and more oil is injected, it pushes the piston 5 upward. The rising piston 5 drives the upper rod 6 upward. The cone at the top of the upper rod 6 compresses the arc-shaped grooves 13 of each movable core 10, thereby causing the three movable cores 10 to move away from each other, thus achieving core expansion. At the same time, the three movable cores 10 that are moving away from each other stretch the elastic ribs 12. To release the expansion, oil is injected into the second injection port 27. The oil then enters the inner groove 2 through the second channel 28 and is positioned above the piston 5, thereby pushing the piston 5 downward. The descending piston 5 squeezes the oil in the inner groove 2 below the piston 5 out of the first channel 26 and the first injection port 25, while simultaneously causing the upper rod 6 to descend. Without the compression of the cone of the upper rod 6, the stretched elastic ribs 12 rebound and cause the three movable cores 10 to move closer to each other, thereby retracting into the shell 1. The operation is complete.

[0035] like Figure 4-6 As shown, the base mechanism includes a base 14, a slot 15, a cavity 16, a limiting plate 17, a spring 18, a locking piece 19, a central groove 20, a winding rod 21, a pull rope 22, a bottom groove 23, and a knob 24.

[0036] The base 14 is located at the port of the inner groove 2 and is fixedly connected to the lower plug 4. Multiple slots 15 are formed on the inner wall of the inner groove 2. Four cavities 16 are rectangularly formed inside the base 14. Each limiting plate 17 is located in the corresponding cavity 16. Each spring 18 is located in the corresponding cavity 16 and is located on one side of the limiting plate 17. Each clip 19 is installed at the center of the other side of the corresponding limiting plate 17 and extends into the corresponding slot 15. The central groove 20 is formed in the center of the interior of the base 14. The winding rod 21 is rotatably installed in the central groove 20. Each pull rope 22 is installed at the center of the side of the corresponding limiting plate 17 and its end extends into the central groove 20 and is fixedly connected to the winding rod 21. The bottom groove 23 is formed in the center of the lower surface of the base 14. The knob 24 is installed at the end of the winding rod 21 that extends into the bottom groove 23.

[0037] When disassembling the base 14, simply rotate the knob 24 to rotate the winding rod 21 to wind the four pull ropes 22, thereby pulling the four limit plates 17 to move. Each moving limit plate 17 compresses the spring 18 and at the same time, it will also drive the clip 19 to move out of the slot 15 and into the cavity 16, thus releasing the fixation of the base 14. After that, the base 14 can be removed from the housing 1 by connecting the lower plug 4, and the internal structure of the inner groove 2 can be inspected.

[0038] During reinstallation, rotate knob 24 to allow each clip 19 to enter the cavity 16 through the above operation. Then, insert the base 14 and lower plug 4 into the inner groove 2, and align the four clips 19 with the four slots 15. Release knob 24 to allow each spring 18 to rebound and drive the limiting plate 17 to return to its original position. The returned limiting plate 17 drives the clips 19 to insert into the aligned slots 15, thereby re-fixing the base 14 onto the housing 1.

[0039] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A three-point core, characterized in that, The utility model relates to a core expander mechanism, which comprises a core expander mechanism for carrying out core expansion operation. The utility model discloses a core expander mechanism, which comprises a shell (1), a lower surface center of the shell (1) is provided with an inner groove (2), an upper cavity (3) is formed in the inner groove (2) of the shell (1), a lower plug (4) is arranged in the inner groove (2), a piston (5) is arranged above the lower plug (4) in the inner groove (2), an upper rod (6) is arranged in the upper cavity (3) and has a pyramid-shaped upper end, three core grooves (9) are formed in the side of the shell (1) and are communicated with the upper cavity (3), a movable core (10) is arranged in each core groove (9), a muscle groove (11) is formed in the side of each movable core (10), a plurality of elastic muscles (12) are arranged in the muscle grooves (11), an arc-shaped groove (13) is formed in the other side of each movable core (10) and is matched with the pyramid-shaped upper end of the upper rod (6), a plurality of first injection ports (25) are formed in the side and lower surface of the shell (1), a first channel (26) is formed in the inner groove (2) and each first injection port (25), a plurality of second injection ports (27) are formed in the side and lower surface of the shell (1), and a second channel (28) is formed in the inner groove (2) and each second injection port (27). The utility model discloses a core expander mechanism, which comprises a core expander mechanism for carrying out core expansion operation. The piston (5) and the upper rod (6) are provided with an installation groove (8), and the upper surface of the lower plug (4) is provided with an installation rod (7) which extends into the installation groove (8).

2. A three-point core according to claim 1, characterized in that The upper rod (6), the piston (5) and the lower plug (4) are provided with sealing grooves, and each sealing groove is provided with a sealing ring (29) matched therewith, the first channel (26) is connected with the inner groove (2) below the piston (5), and the second channel (28) is connected with the inner groove (2) above the piston (5).

3. A three-point core according to claim 2, characterized in that The utility model discloses a core expander mechanism, which comprises a core expander mechanism for carrying out core expansion operation.

4. A three-point core according to claim 1, characterized in that Each cavity (16) is provided with a limiting plate (17), each cavity (16) is provided with a spring (18) on one side of the limiting plate (17), and each limiting plate (17) is provided with a clamping piece (19) which extends into the aligned clamping groove (15) on the other side.

5. A three-point core according to claim 4, characterized in that ​ 6. A three-point core according to claim 5, characterized in that The inside center of the base (14) is provided with a center groove (20), the inside center of the center groove (20) is rotatably provided with a winding rod (21), the side center of each limiting plate (17) is provided with a pull rope (22) extending to the center groove (20) and fixedly connected with the winding rod (21), the lower surface center of the base (14) is provided with a bottom groove (23), the lower end of the winding rod (21) extends to the bottom groove (23) and is provided with a knob (24).

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