Push-pull mechanism of rotary fixing pin

Abstract

The utility model discloses a push-pull mechanism of a rotary fixing pin. The push-pull mechanism comprises an operation control rod, a rotary shaft, a flexible shaft, a protective hose, a support, a chaining head, a pin shaft, a crank arm, a supporting shaft, a connecting plate, a fixing pin and a butterfly-shaped gasket. One end of the operation control rod is in coaxial spline connection with the rotating shaft and the butterfly-shaped gasket and is fastened through a bolt, the rotating shaft is provided with an outer shell, one end of the flexible shaft is fixedly connected with the circumferential face of the rotating shaft, the other end of the flexible shaft penetrates through the protection hose, the other end of the protection hose is fixedly connected with the support, and the flexible shaft is connected with the chaining head at the penetrating-out section of the protection hose. And the supporting shaft is fixed above the chaining head. The mechanism is relatively smooth in the transmission process, the phenomenon of jerking and effort is avoided when the control rod is operated, the force is not different from the force used by direct pin pulling and locking operation, the fixed pin can fall down after shutdown, and the fixed pin does not need to repeatedly enter and exit from an operation room to check whether the fixed pin is aligned or not. And industrial application is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment with a rotary mechanism, and specifically to a push-pull mechanism with a rotary fixed pin. Background Technology

[0002] Due to quality and safety system requirements, mechanical equipment with a slewing mechanism must be rotated back to a fixed, forward position and locked after shutdown. To address this, many manufacturers use locking pins on the outside of the slewing mechanism. However, currently, no effective method for inserting and removing these pins has been found on the market; most operations rely on manual insertion and removal. This requires assistance from a third party to check the pin's alignment, making it difficult for one person to perform the operation alone. Furthermore, operators are prone to forgetting to insert the pins after stopping work, leading to accidental operation and accidents. To simplify the operator's process, a push-pull transmission mechanism has been designed. Its simple structure and convenient maintenance allow for quick disassembly and manual removal of the locking pins even if structural connections malfunction and cannot be repaired promptly, without affecting the normal operation of the equipment. Utility Model Content

[0003] To address the issue that existing rotary fixing pins are difficult to operate, leading to reduced operator efficiency, this application aims to provide a push-pull mechanism for rotary fixing pins that allows for insertion and removal of the fixing pins by a single person.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A push-pull mechanism with a rotating fixed pin includes an operating control lever, a rotating shaft, a flexible shaft, a protective hose, a bracket, a connecting head, a pin, a crank arm, a support shaft, a connecting plate, a fixed pin, and a butterfly gasket.

[0006] One end of the operating control lever is coaxially splined with the rotary shaft and the butterfly washer and secured with bolts. The rotary shaft has an outer shell. One end of the flexible shaft is fixedly connected to the circumferential surface of the rotary shaft. The other end of the flexible shaft passes through the protective hose. The other end of the protective hose is fixedly connected to the bracket. The flexible shaft is connected to the connector at the section where it passes through the protective hose. The support shaft is fixed above the connector, and the crank arm rotates concentrically on the support shaft. The connector and one end of the crank arm are concentrically connected by a pin. The other end of the crank arm and one end of the connecting plate are concentrically connected by a pin. The connecting plate consists of multiple plates connected in series. The connecting plate at the tail is concentrically connected to the upper end of the fixing pin by a pin.

[0007] The operating control lever is secured to the outside by bolts.

[0008] The rotary shaft rotates at a fixed position at the center of the outer shell, and its position within the outer shell does not affect the position that drives the flexible shaft to rotate.

[0009] One end of the flexible shaft is bolted to the circumferential surface of the rotating shaft, allowing the flexible shaft to be wound around the rotating shaft.

[0010] The tail end of the flexible shaft is connected to the connecting head bolt.

[0011] There are n connecting plates, where n > 1, and they are connected in series.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention overcomes the limitations of the existing manual pin-pulling and locking operation method. The transmission process is relatively smooth, and there is no stuttering or strain when operating the control lever. The force required is no different from that of directly pulling the pin to lock. Moreover, the fixing pin can be lowered after the machine stops without having to repeatedly enter and exit the control room to check whether the fixing pin is aligned. This mechanism allows for simultaneous operation of rotation and lowering of the fixing pin, making it convenient for industrial applications. Attached Figure Description

[0014] Figure 1 This is a front view structural schematic diagram of the push-pull mechanism of the rotary fixing pin provided in this embodiment of the utility model;

[0015] Figure 2 This is a top view of the push-pull mechanism of the rotary fixing pin provided in this embodiment of the utility model;

[0016] Figure 3 This is a three-dimensional actual application position diagram of the push-pull mechanism of the rotary fixed pin provided in this embodiment of the utility model;

[0017] In the diagram, the components are: 1. Operating control lever; 2. Rotary shaft; 3. Flexible shaft; 4. Protective hose; 5. Bracket; 6. Connector; 7. Pin; 8. Crank arm; 9. Support shaft; 10. Connecting plate; 11. Fixing pin; 12. Butterfly gasket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0021] Please see Figures 1-3 The diagram shows the structure of an embodiment provided by this utility model.

[0022] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a push-pull mechanism for a rotating fixed pin, comprising an operating control lever 1, a rotating shaft 2, a flexible shaft 3, a protective hose 4, a bracket 5, a connecting head 6, a pin 7, a crank arm 8, a support shaft 9, a connecting plate 10, a fixing pin 11, and a butterfly washer 12. The operating control lever 1, rotating shaft 2, and butterfly washer 12 are all designed on a housing and are referred to as operating elements. Since the flexible shaft 9 and the protective hose 4 connect the housing and the operating elements and subsequent components such as the crank arm 8, the flexible shaft 9 is referred to as a transmission element. The crank arm 8, support shaft 9, connecting plate 10, and fixing pin 11 are referred to as actuating elements.

[0023] An outer casing should be installed outside the rotating shaft 2. The operating control lever 1 is mounted on one side of the outer casing, controlling the rotating shaft 2 to rotate together. A protective hose 4 is connected to the outer casing at a convenient point where the flexible shaft 3 protrudes from the casing. The tail end of the protective hose 4 is connected to a bracket 5 to control the extension direction of the flexible shaft. The bracket 5 is fixed at a position where the flexible shaft 3 can be parallel to one end of the connecting head 6 and the crank arm 8. A support shaft 9 is positioned above the connecting head 6, allowing the crank arm 8 to rotate on the support shaft 9 without affecting its rotational connection with the connecting head 6. The other end of the crank arm 8 is connected to a connecting plate 10, and the connecting plate 10 at the tail end is rotatably connected to the upper connecting hole of the fixing pin 11. To ensure the rotating fixing pin does not fall after being raised, it is fixed by tensioning a butterfly washer 12 to prevent the operating lever from springing back.

[0024] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment further defines the connection between the rotary shaft 2 and the flexible shaft 3 as described in Specific Embodiment 1. The end of the flexible shaft 3 is fixed to the circumferential surface of the rotary shaft 2, so that the flexible shaft can wrap around the circumferential surface of the rotary shaft 2 according to its own characteristics, ensuring that it can extend and retract within the operating element.

[0025] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment describes a specific implementation method where one end of the protective tubing 4 is connected to the housing, allowing the flexible shaft 3 to extend and lock in a specified direction and preventing the flexible shaft 3 from rusting or being damaged.

[0026] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment further defines the flexible shaft 3 described in Specific Embodiment Two. The end of the flexible shaft transmission and the connecting head 6 should be threaded together to prevent the connecting head 6 from being unable to rotate concentrically with one end of the crank arm 8 due to the torsional stress of the flexible shaft 3 itself.

[0027] Specific Implementation Method Five: Combining Figure 1 and Figure 2 This embodiment further defines the protective hose described in Specific Embodiment 3. The end of the protective hose 4 should be connected and fixed to the bracket 5 to ensure that the extension direction of the hose 3 is perpendicular to the axis of the crank arm 8.

[0028] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment further defines the crank arm 8 described in Specific Embodiment 1. The two arms of the crank arm 8 should form an acute angle and open downwards at a small angle to prevent dead point transmission failure.

[0029] Specific implementation method seven: Combining Figure 1 and Figure 2 This embodiment describes the crank arm 8 described in Specific Embodiment Six, wherein the connecting holes on both sides of the arm are radially parallel to the direction of the flexible shaft extension to prevent the transmission mechanism from jamming.

[0030] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment describes the concentric rotation of the crank arm on the support shaft 9 as described in Specific Embodiment 1. It further limits the axial direction of the support shaft 9 to be perpendicular to the direction of movement of the flexible shaft 3 to ensure smooth movement of the mechanism.

[0031] Specific Implementation Method Nine: Combining Figure 1 and Figure 2 This embodiment describes the crank arm 8 described in Specific Embodiment Six, wherein the connecting holes at both ends are parallel to the axial direction of the support shaft 9 to ensure smooth transmission.

[0032] Specific implementation method ten, combined with Figure 1 and Figure 2 This embodiment further defines the connecting plate 10 described in Specific Embodiment 1. The number of connecting plates should be two or more to prevent jerking and strain caused by excessive and uneven upward movement of a single connecting plate 10 when the crank arm 8 rotates.

[0033] Specific implementation method eleven, combined with Figure 1 and Figure 2 This embodiment further defines the pin 7 described in Specific Embodiment 1. In the actuator, all rotary motion connections are made by the pin 7 to prevent the failure of the mechanism to be quickly disassembled after a malfunction, which would affect the normal operation of the equipment.

[0034] Specific implementation method twelve, combined with Figure 1 and Figure 2 This embodiment further defines the butterfly gasket 12 described in Specific Embodiment 1, wherein a pair of interlocking butterfly gaskets 12 are placed concentrically between the operating control lever 1 and the rotating shaft 2.

[0035] Working principle

[0036] In this mechanism, the operating control lever 1, the rotating shaft 2, and the butterfly gasket 12 are all designed on a housing and are called operating elements. Since the flexible shaft 9 and the protective hose 4 connect the operating element and subsequent series components such as the crank arm 8, the flexible shaft 9 is called the transmission element. The pin 7, crank arm 8, support shaft 9, connecting plate 10, and fixing pin 11 are called actuating elements.

[0037] In use, the actuator of this mechanism is generally installed on the outside of the rotary equipment on a fixed rotational trajectory, and the operating element is installed in the operating room or on the equipment operating table. The operating element and the actuator are connected by the transmission element to form a complete push-pull mechanism.

[0038] Rotating the control lever 1 drives the rotary shaft 2 to rotate, causing the flexible shaft 3 to unwind around the circumference of the rotary shaft 2. This allows the flexible shaft to extend and retract at the end of the protective hose 4. The flexible shaft 3 is connected to the threaded connector 7, which pushes and pulls the crank arm 8 to rotate on the support shaft 9. Since the two arms of the crank arm 8 are rigidly fixed, the rotation of the crank arm 8 will cause the connecting plate 10 and the fixing pin 12 to follow. In actual use, a fixing groove is provided below the fixing pin to cooperate with the fixing pin 11. Therefore, the fixing pin moves up and down in the mechanism. To prevent the fixing pin 11 from falling and causing the entire mechanism to rotate due to its own weight, a pair of interlocking butterfly washers 12 are placed between the rotary shaft 2 and the control lever 1. The three are pressed together with a nut. The elasticity of the butterfly washers 12 increases the friction between the rotary shaft and the housing. This friction is greater than the weight of the fixing pin but less than the manual force, thereby achieving the positioning of the fixing pin and labor-saving operation.

[0039] This application designs a simple push-pull mechanism for a rotating fixing pin, reducing the workload of operators and allowing one person to complete the operation without the need for multiple assistants. When equipment rotation is required, the operator can operate the control lever from the cab. After the equipment finishes working, when locking is needed, the operator no longer needs to run back and forth to align and lock the equipment, or require assistance to align it. This mechanism allows the operator to perform equipment alignment and locking of the fixing pin simultaneously, further reducing the risk of accidental collisions due to forgetting to lock the fixing pin after work, and improving work efficiency. The mechanism uses a flexible shaft to push and pull a rotating component to control the locking process of the fixing pin. This utility model is applicable to equipment with a rotating mechanism that requires a fixed position.

[0040] 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 preferred examples and are not intended to limit the 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A push-pull mechanism with a rotating fixed pin, characterized in that: Includes operating control lever (1), rotary shaft (2), flexible shaft (3), protective hose (4), bracket (5), connector (6), pin (7), crank arm (8), support shaft (9), connecting plate (10), fixing pin (11), and butterfly gasket (12); One end of the operating control lever (1) is coaxially splined with the rotary shaft (2) and the butterfly washer (12) and is tightened by bolts. The rotary shaft (2) is provided with an outer shell. One end of the flexible shaft (3) is connected and fixed to the circumferential surface of the rotary shaft (2). The other end of the flexible shaft (3) passes through the protective hose (4). The other end of the protective hose (4) is fixedly connected to the bracket (5). The flexible shaft (3) is connected to the connector (6) at the section through which the protective hose (4) passes. The support shaft (9) is fixed above the connector (6), and the crank arm (8) rotates concentrically on the support shaft (9). The connector (6) and one end of the crank arm (8) are connected concentrically by a pin (7). The other end of the crank arm (8) and one end of the connecting plate (10) are connected concentrically by a pin (7). The connecting plate (10) consists of multiple connected in series. The upper end of the connecting plate (10) at the tail is connected concentrically by a pin (7).

2. The push-pull mechanism with a rotating fixed pin according to claim 1, characterized in that: The operating control lever (1) is secured to the outside by bolts.

3. The push-pull mechanism with a rotating fixed pin according to claim 1, characterized in that: The rotary shaft (2) rotates at a fixed position at the center of the outer shell. The position of the rotary shaft (2) within the outer shell does not affect the position that drives the flexible shaft to rotate.

4. The push-pull mechanism with a rotating fixed pin according to claim 3, characterized in that: One end of the flexible shaft (3) is bolted to the circumferential surface of the rotating shaft (2), so that the flexible shaft can be wound around the rotating shaft.

5. The push-pull mechanism of the rotary fixed pin according to claim 4, characterized in that: The tail end of the flexible shaft (3) is bolted to the connector (6).

6. The push-pull mechanism of the rotary fixed pin according to claim 5, characterized in that: There are n connecting plates (10), where n > 1, and they are connected in series.

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