A special wrench for ring nut

Abstract

The application discloses a special wrench for ring toothed nut, which comprises a wrench body, the wrench body is integrally formed with an operating handle and a working head. The working head is a cylindrical structure, and a plurality of outer clamping teeth are uniformly distributed on the outer peripheral wall of the working head. The number of the outer clamping teeth is matched with the number of the clamping ports of the ring nut, and the outer clamping teeth can be correspondingly clamped into the clamping ports of the ring nut. A central through hole is arranged at the center position of the working head, and the inner diameter of the central through hole is greater than the outer diameter of the central shaft of the ring nut, so as to avoid the central shaft of the ring nut, ensure the accurate centering of the wrench and the nut shaft, and reduce the central clearance. The present application is accurate and uniform in stress, the outer clamping teeth on the inner and outer walls of the working head are one-to-one corresponding to the clamping ports of the ring nut, full adhesion is realized, torque is uniformly transmitted to each tooth surface, nut damage caused by local stress is avoided, parts are effectively protected, and maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of ship repair tool technology, specifically relating to a special wrench for disassembling ring tooth nuts during ship gearbox repair. Background Technology

[0002] In the maintenance of marine gearboxes, it is often necessary to disassemble the ring nuts used to secure internal components. These ring nuts typically have a structure with multiple toothed rings distributed around the inner wall, forming a spline-type ring-tooth nut. Traditionally, disassembly is performed using an adjustable wrench.

[0003] However, the contact between an adjustable wrench and a ring nut is point or line contact, resulting in a small and uneven force distribution area. This makes slippage during disassembly highly likely, easily damaging the nut's tooth structure and rendering it unusable. Furthermore, the significant central play between the wrench and the nut makes it difficult for the operator to apply force effectively, leading to difficult and inefficient disassembly. In addition, when the nut is tightened excessively due to long-term use or corrosion, an adjustable wrench alone often cannot provide sufficient disassembly torque. Therefore, there is an urgent need for a specialized disassembly tool designed specifically for these ring nuts, capable of evenly distributing force and facilitating easy application of force. Summary of the Invention

[0004] This invention provides a special wrench for ring-tooth nuts, which solves the problems of uneven force distribution, easy slippage, large play, and difficulty in applying force of traditional tools. It achieves the effects of uniform force distribution, easy disassembly, less damage to nuts, good center alignment, external torque tool connection, and lightweight design for easy carrying and observation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A special wrench for ring tooth nuts includes a wrench body, which has an integrally formed operating handle and a working head.

[0006] The working head has a cylindrical structure, and multiple external locking teeth are evenly distributed on the outer peripheral wall of the working head. The number of external locking teeth matches the number of locking slots of the ring nut, and the external locking teeth can be locked into the locking slots of the ring nut one by one. The working head has a central through hole at its center. The inner diameter of the central through hole is larger than the outer diameter of the central shaft of the ring nut. This is to avoid the central shaft of the ring nut, ensuring that the wrench and the nut shaft are accurately aligned and reducing the central play.

[0007] The operating handle has a long strip-shaped structure. One end of the operating handle is fixedly connected to the side wall of the working head. The free end of the operating handle has an auxiliary force hole. The auxiliary force hole is used to insert a steel pipe to extend the lever arm, or to insert a large torque wrench. The working head is equipped with a weight reduction observation groove that runs through the working head. This groove is used to reduce the overall weight of the tool and also allows the operator to observe the fit between the wrench and the nut.

[0008] Preferably, the number of locking teeth is twelve, corresponding one-to-one with the twelve locking slots of the toothed ring nut commonly used on ships, so as to achieve full fit and force distribution.

[0009] Preferably, the tooth shape of the outer clamping tooth is perfectly matched with the clamping shape of the ring nut, and the working surface of the outer clamping tooth is a planar structure to ensure uniform force transmission.

[0010] Preferably, the central through hole is a circular through hole, and the axis of the central through hole coincides with the axis of the working head to ensure the coaxiality of the wrench and nut and eliminate central play.

[0011] Preferably, the auxiliary force hole is a circular through hole, and the axis of the auxiliary force hole is perpendicular to the length direction of the operating handle, which facilitates the insertion of a steel pipe to extend the lever arm.

[0012] Preferably, the weight reduction observation groove is four arc-shaped grooves, which are evenly distributed around the axis of the central through hole, so as to achieve weight reduction while ensuring the structural strength of the working head.

[0013] Preferably, the free end of the operating handle is provided with a rounded corner transition to avoid scratching the operator during operation.

[0014] Preferably, the wrench body is forged from alloy steel in one piece to ensure the structural strength and service life of the tool.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Precise fit and uniform force distribution: The outer teeth on the inner and outer walls of the working head correspond one-to-one with the locking slots of the ring nut, achieving a complete fit and uniformly transmitting torque to each tooth surface. This avoids damage to the nut caused by localized force, effectively protects the parts, and reduces maintenance costs. 2. Coaxial positioning to eliminate play: The central through hole avoids the central axis of the ring nut, so that the wrench and the nut axis are precisely aligned, greatly reducing the central play, making the force application stable during operation, less prone to slippage, and improving work efficiency and safety; 3. Multiple power application methods to adapt to high torque operations: The auxiliary power application hole at the free end of the operating handle can be used to insert a steel pipe to extend the lever arm, or a large-capacity wrench can be inserted to transmit precise high torque, easily disassembling rusted or tight ring nuts, expanding the applicable scenarios of the tool; 4. Lightweight design for easy carrying and observation: The weight-reducing observation slot significantly reduces the overall weight of the tool while ensuring structural strength, making it easy to carry on board. At the same time, the weight-reducing observation slot can intuitively show the fit between the wrench and the nut, allowing operators to make real-time adjustments and improve operational accuracy. 5. Dedicated fit, highly targeted: Specifically designed for spline ring tooth nuts inside marine gearboxes, highly targeted and adaptable, significantly improving maintenance efficiency and safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the structure during the use of a specific embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the structure of the wrench when it separates from the ring-tooth nut in a specific embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the structure of the wrench and the ring tooth nut combined in a specific embodiment of the present invention; Figure 4 This is a top view diagram illustrating the specific embodiment of the wrench of the present invention; Figure 5 This is a three-dimensional structural diagram illustrating a specific embodiment of the wrench of the present invention; Figure 6 A bottom view of the wrench in a specific embodiment of the present invention is shown in the schematic diagram. The reference numerals in the accompanying drawings include: 1. Wrench body; 2. Operating handle; 3. Working head; 4. External locking teeth; 5. Central through hole; 6. Auxiliary force hole; 7. Weight reduction observation groove; 8. Ring tooth nut; 9. Central shaft. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] The accompanying drawings are for illustrative purposes only and represent schematic diagrams, not actual physical objects. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0019] like Figure 1 - Figure 6As shown, the present invention provides a special wrench for ring tooth nuts, including a wrench body 1, which includes an integrally formed operating handle 2 and a working head 3.

[0020] The working head 3 has a cylindrical structure. Multiple external locking teeth 4 are evenly distributed on the outer peripheral wall of the working head 3. The number of external locking teeth 4 is adapted to the number of slots of the ring tooth nut 8 commonly used in marine gearboxes. The tooth shape of the external locking teeth 4 is perfectly matched with the slot shape of the ring tooth nut 8. The working surface of the locking teeth 4 is a planar structure, which can be inserted into the slot of the ring nut 8 one by one to achieve full fit and force distribution. The torque is evenly transmitted to each tooth surface, avoiding nut damage caused by local force.

[0021] The outer diameter of this special wrench is smaller than the inner diameter of the ring nut, allowing it to be inserted into the nut for a proper fit.

[0022] like Figure 4 As shown, a central through hole 5 is provided at the center of the working head 3. The central through hole 5 is a circular through hole, and the axis of the central through hole 5 coincides with the axis of the working head 3. The inner diameter of the central through hole 5 is larger than the outer diameter of the central shaft 9 of the ring nut 8. This is used to avoid the gearbox shaft end component / central shaft 9, ensuring that the wrench and the nut shaft are accurately aligned, greatly reducing the central play, and making the force application stable and less prone to slippage during operation.

[0023] The operating handle 2 has a long strip structure. One end of the operating handle 2 is fixedly connected to the side wall of the working head 3. The free end of the operating handle 2 is provided with an auxiliary force hole 6. The auxiliary force hole 6 is a circular through hole. The axis of the auxiliary force hole 6 is perpendicular to the length direction of the operating handle 2. It is used to pass through a steel pipe to extend the lever arm, or to insert a large torque wrench to transmit large torque, easily disassemble rusted and tight ring nuts 8, and adapt to the needs of high torque operation.

[0024] The working head 3 is provided with four weight reduction observation slots 7. The four weight reduction observation slots 7 are evenly distributed around the axis of the central through hole 5. The weight reduction observation slots 7 pass through the operating handle 2 and the side wall of the working head 3. While ensuring the structural strength of the working head 3, the overall weight of the tool is greatly reduced, making it convenient to carry on board. Meanwhile, the weight reduction observation slot 7 can intuitively display the fit between the wrench and the nut, making it easy for operators to make real-time adjustments and improving operational accuracy.

[0025] also, Figure 6 As shown, the free end of the operating handle 2 is provided with a rounded corner transition to avoid scratching the operator during operation.

[0026] The wrench body 1 is forged from alloy steel in one piece, ensuring the structural strength and service life of the tool, and is suitable for the high-intensity working environment of ship maintenance.

[0027] When using, such as Figure 1As shown, the working head 3 is fitted onto the outside of the ring tooth nut 8, so that the outer teeth 4 are inserted into the slots of the ring tooth nut 8 one by one, and the central through hole 5 avoids the central axis 9 of the ring nut 8, so as to achieve precise coaxial positioning of the wrench and the nut. The operator holds the operating handle 2 and observes the fit through the weight reduction observation groove 7. After confirming the fit, the operator can rotate the operating handle 2 to remove the nut. For tightened nuts, a steel pipe can be inserted into the auxiliary force hole 6 to extend the lever arm, or a large torque can be transmitted by inserting a large torque wrench. Rotating the wrench body 1 will drive the ring tooth nut to rotate, thus completing the disassembly or tightening operation.

[0028] The special wrench for ring tooth nuts in this embodiment can be made of high-quality tool steel through integral forging and machining, or it can be manufactured by precision casting or CNC machining (such as milling) to ensure the fitting accuracy between the outer teeth and the tooth groove of the ring tooth nut.

[0029] It should be noted that, due to factors such as the milling machine / tool, the external locking teeth in this embodiment are square, but they can also have other structural forms, including fan-shaped, circular, or irregular cross-sections, and are not specifically limited.

[0030] It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A special wrench for ring-tooth nuts, characterized in that, include: The wrench body has an integrated operating handle and working head; The working head has a cylindrical structure, and multiple external locking teeth are evenly distributed on the outer peripheral wall of the working head; A central through hole is provided at the center of the working head; One end of the operating handle is fixedly connected to the side wall of the working head, and the free end of the operating handle is provided with an auxiliary force hole; The working head is provided with a weight reduction observation slot; The tooth shape of the outer retaining tooth matches the shape of the inner tooth groove of the ring nut.

2. The special wrench for ring-tooth nuts as described in claim 1, characterized in that: The central hole is a circular through hole, and the axis of the central hole coincides with the axis of the working head.

3. The special wrench for ring-tooth nuts as described in claim 1, characterized in that: The auxiliary power-generating hole is a circular through hole, and the axis of the auxiliary power-generating hole is perpendicular to the length direction of the operating handle.

4. A special wrench for ring-tooth nuts as described in claim 1, characterized in that: The weight reduction observation groove consists of four arc-shaped grooves, which are evenly distributed around the axis of the central through hole.

5. A special wrench for ring-tooth nuts as described in claim 1, characterized in that: The free end of the operating handle has a rounded corner transition.

6. A special wrench for ring-tooth nuts as described in claim 5, characterized in that: The wrench body is forged from a single piece of alloy steel.

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