A type of oil pipe ratchet wrench

Abstract

This utility model provides a hose ratchet wrench, belonging to the field of wrench technology. It solves the technical problems of slippage in existing wrenches. This hose ratchet wrench includes a handle, a ratchet head, and a ratchet ring. Both ends of the ratchet ring have protrusions, each with a circular groove arranged coaxially with the ratchet ring. A radially penetrating fixing groove is formed on each protrusion; there is at least one fixing groove. A turntable is provided on both sides of the ratchet head, each turntable rotatably embedded in its corresponding circular groove. A third opening is provided on each turntable, which is always aligned with the second opening of the ratchet ring. At least one positioning block protrudes inward from the inner circumferential wall of the turntable, engaging with the fixing groove to achieve circumferential fixation and synchronous rotation of the turntable and ratchet ring. This utility model improves the reliability of torque transmission and the operational stability of the tool.

Description

Technical Field

[0001] This utility model belongs to the field of wrench technology, specifically referring to an oil pipe ratchet wrench. Background Technology

[0002] A ratchet wrench is a common hand wrench used to tighten or loosen bolts and nuts. The ratchet wrench operates on the principle of a ratchet mechanism and mainly consists of a ratchet, pawl, and handle. When the handle is rotated, the pawl engages with the teeth of the ratchet, allowing unidirectional rotation and effectively tightening or loosening bolts and nuts. Specifically, the internal structure of a ratchet wrench locks the wrench when rotated clockwise and allows free movement when rotated counterclockwise, preventing it from loosening in the opposite direction during tightening.

[0003] Existing Chinese patents, such as CN113618665A, disclose a one-way ratchet wrench structure, in which one head of the wrench body is generally a complete circle. This type of wrench may not be able to fully fit onto bolt heads in confined spaces, especially inside machines where it needs to be operated around electrical wires; in such cases, the wrench cannot be properly fitted.

[0004] To address the aforementioned issues, existing technologies, such as US Patent Publication No. 8166849B2, disclose a combined open-end ratchet wrench. Its key feature is that it combines the functions of an open-end wrench and a box wrench, making it particularly suitable for space-constrained environments or operations requiring maneuvering around obstacles such as oil pipes. It integrates a ratchet mechanism with a side opening within a wrench head; the two openings can be aligned to form a large passageway for obstacle maneuvering. This structure achieves unidirectional drive through the interaction of a control element with the ratchet pawl, and adjusts the opening position through an angled coupling between a rotating cap and the ratchet end. However, this structure has certain drawbacks: the rotating cap is only coupled to the ratchet on one side, making it difficult to effectively resist the enormous torque generated by the ratchet during operation. This can easily lead to slippage and misalignment between the rotating cap and the ratchet, affecting the reliable transmission of torque and the overall stability of the tool. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an oil pipe ratchet wrench.

[0006] The technical problem this invention aims to solve is how to enhance the coupling strength of transmission components, prevent slippage, and ensure operational reliability and efficiency while retaining the advantages of lateral openings.

[0007] The objective of this utility model can be achieved through the following technical solution: a hose ratchet wrench includes a handle body, one end of which is provided with a ratchet head having a first opening; a ratchet ring is rotatably accommodated within the ratchet head, and the ratchet ring has a second opening; a ratchet mechanism is provided between the ratchet head and the ratchet ring, the ratchet mechanism including teeth and a spring for providing elastic force to the teeth; both axial ends of the ratchet ring are provided with protrusions, which axially protrude towards both sides of the ratchet head; each of the protrusions is provided with... The annular groove is coaxially arranged with the ratchet ring; the protrusion is also provided with a radially penetrating fixing groove; there is at least one fixing groove; a turntable is provided on both sides of the ratchet head, and each turntable is rotatably embedded in the corresponding annular groove; the turntable is provided with a third opening, which is always aligned with the second opening of the ratchet ring; at least one positioning block is formed by protruding inward on the inner peripheral wall of the turntable, and the positioning block engages with the fixing groove to realize the circumferential fixation and synchronous rotation of the turntable and the ratchet ring.

[0008] The above solution utilizes the rigid, synchronous rotation of the ratchet ring and the two side turntables. Force is directly and evenly transmitted from the turntables to the ratchet ring through the positioning block and fixed groove interface, reducing slippage and ensuring reliable power transmission under high torque conditions. The design of the two side turntables allows the operator to easily align the third opening with the second opening by rotating the turntable from either side of the wrench, forming a passage for bypassing the oil pipe. This significantly improves operational convenience and work efficiency in space-constrained environments.

[0009] In the aforementioned type of oil pipe ratchet wrench, the retaining groove is a single unit, and this retaining groove is radially positioned opposite to the second opening. Positioning the retaining groove on the side furthest from the second opening avoids stress superposition and optimizes the mechanical distribution of the ratchet ring. Simultaneously, the single retaining groove structure is simple, reducing the machining difficulty and manufacturing cost of the part.

[0010] In the aforementioned type of hose ratchet wrench, the number of fixing grooves is two or three, and each fixing groove is evenly distributed circumferentially along the protrusion. Multiple evenly distributed fixing grooves change the torque transmission between the turntable and the ratchet ring from a single point to multiple points, significantly improving the torque carrying capacity and shear strength of the interface. The symmetrical and evenly distributed design makes the force distribution more balanced, reduces local wear, avoids stress concentration, and thus improves the smoothness of transmission and the service life of the entire coupling mechanism.

[0011] In one of the aforementioned hose ratchet wrenches, the ratchet head and the handle are rotatably connected via a pivoting connector. This structure allows the ratchet head to rotate within a certain angle relative to the handle, enabling the user to apply force at different angles. This greatly enhances adaptability to complex and narrow operating spaces and avoids the need for frequent tool changes to accommodate different angles.

[0012] In one of the aforementioned hose ratchet wrenches, the pivoting connector includes an elastic washer and a screw. The elastic washer generates continuous friction after the screw is tightened, ensuring the ratchet head remains stable after rotating to a certain angle, preventing free wobbling and facilitating one-handed operation and precise positioning.

[0013] In the aforementioned oil pipe ratchet wrench, two sets of ratchet mechanisms are provided, and two adjacent receiving cavities are opened inside the ratchet head. The two sets of ratchet mechanisms are respectively housed in the corresponding receiving cavities; the teeth are radially limited by a retaining ring.

[0014] In the aforementioned hose ratchet wrench, the handle and ratchet head are a single, integrated structure. This one-piece molding of the handle and ratchet head ensures the overall structural strength and durability of the tool, meeting the demands of high-intensity, high-frequency tightening operations.

[0015] In one type of hydraulic ratchet wrench described above, the ratchet ring has an internal polygonal structure, with each pair of adjacent sides of the polygon connected by a rounded edge. The polygonal structure provides a strong clamping surface, while the rounded transition edge better encloses the nut's edges, increasing the contact area and reducing pressure per unit area, thereby effectively reducing slippage and wear on the nut's edges. The rounded edge, compared to a pure right angle, is more tolerant of centering deviations, making it easier to slip the wrench onto the nut.

[0016] Compared with existing technologies, the technical advantages of this utility model are as follows: First, by setting protrusions and fixing grooves at both ends of the ratchet ring, and setting positioning blocks that engage with it on the inner circumference of the two side turntables, a large-area circumferential bidirectional locking between the turntables and the ratchet ring is achieved. This structure can effectively resist the huge torque during operation, avoid the slippage and misalignment problems easily caused by traditional single-sided coupling methods, and significantly improve the reliability of torque transmission and the operational stability of the tool. Second, the design of the two side turntables allows the operator to easily rotate and align the opening from both sides of the wrench, facilitating operation around obstacles such as oil pipes in narrow spaces. At the same time, the ratchet ring adopts a polygonal structure with a rounded transition, which can not only adapt to standard nuts but also better enclose non-standard or slightly worn parts, enhancing the tool's practicality and applicability. Attached Figure Description

[0017] Figure 1 This is an exploded view of Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the ratchet head, teeth, and spring of Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the turntable in Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the ratchet head, turntable, and ratchet ring of Embodiment 1 of this utility model.

[0021] Figure 5 This is an exploded view of Embodiment 2 of this utility model.

[0022] Figure 6 This is a schematic diagram of the spike ring in Embodiment 3 of this utility model.

[0023] Figure number markings: 1. Handle body; 2. Ratchet head; 201. First opening; 202. Receiving cavity; 3. Elastic washer; 4. Screw; 5. Ratchet ring; 501. Second opening; 502. Protrusion; 503. Circular groove; 504. Fixing groove; 6. Tooth; 7. Spring; 8. Turntable; 801. Third opening; 802. Positioning block; 9. Snap ring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They 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 must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example 1: A hose ratchet wrench includes a handle 1, with a ratchet head 2 at one end. The ratchet head 2 is rotatably connected to the handle 1 via a pivoting connector. The user can adjust the ratchet head 2 to the most suitable angle according to the size and orientation of the actual workspace, allowing the handle 1 sufficient room to swing. The pivoting connector includes an elastic washer 3 and a screw 4. The elastic washer 3 is preferably a spring washer. The elastic washer 3 is located between the ratchet head 2 and the handle 1 and is connected by the screw 4. After the screw 4 is tightened, the elastic washer 3 generates continuous friction, ensuring that the ratchet head 2 remains stable after rotating to a certain angle, preventing free wobbling and facilitating one-handed operation and precise positioning.

[0027] The ratchet head 2 has a first opening 201; a ratchet ring 5 is rotatably housed inside the ratchet head 2, and the ratchet ring 5 has a second opening 501; a ratchet mechanism is provided between the ratchet head 2 and the ratchet ring 5, the ratchet mechanism including teeth 6 and a spring 7 for providing elastic force to the teeth 6; both axial ends of the ratchet ring 5 are provided with protrusions 502, which protrude axially toward both sides of the ratchet head 2 respectively; each protrusion 502 is provided with an annular groove 503, which is coaxially arranged with the ratchet ring 5; the protrusions 502 are provided with... A radially penetrating fixing groove 504 is also provided; there is at least one fixing groove 504; a turntable 8 is provided on both sides of the ratchet head 2, and each turntable 8 is rotatably embedded in the corresponding annular groove 503; a third opening 801 is provided on the turntable 8, which is always aligned with the second opening 501 of the ratchet ring 5; at least one positioning block 802 is formed protruding inward on the inner peripheral wall of the turntable 8, and the positioning block 802 engages with the fixing groove 504 to achieve circumferential fixation and synchronous rotation of the turntable 8 and the ratchet ring 5. The ratchet ring 5 and the two turntables 8 rotate rigidly and synchronously. The force flow is directly and evenly transmitted from the turntable 8 to the ratchet ring 5 through the interface of the positioning block 802 and the fixing groove 504, reducing slippage and ensuring the reliability of power transmission under high torque conditions. The design of the two turntables 8 allows the operator to rotate the turntable 8 from either side of the wrench to easily align the third opening 801 with the second opening 501 to form a passage for bypassing the oil pipe. This greatly improves the ease of operation and work efficiency in space-constrained environments.

[0028] The ratchet ring 5 has an internal polygonal structure, with each pair of adjacent sides connected by a rounded edge. This polygonal structure provides a strong clamping surface, while the rounded transition edge better encloses the nut's edges, increasing the contact area and reducing pressure per unit area, thus effectively reducing slippage and wear on the nut's edges. The rounded edge is more tolerant of centering misalignment than a pure right angle, making it easier to slip the wrench onto the nut.

[0029] The ratchet mechanism is provided in two sets. The ratchet head 2 has two adjacent receiving cavities 202 inside, and the two sets of ratchet mechanisms are respectively housed in the corresponding receiving cavities 202; the tooth cutting 6 is radially limited by the retaining ring 9.

[0030] The fixing groove 504 is a single groove, and it is positioned radially opposite to the second opening 501. Positioning the fixing groove 504 away from the second opening 501 avoids stress superposition and optimizes the mechanical distribution of the ratchet ring 5. Furthermore, the single fixing groove 504 has a simple structure, reducing the difficulty of machining and manufacturing costs.

[0031] Example 2: This example is another implementation of the handle 1 and ratchet head 2. In this example, the handle 1 and ratchet head 2 are a single integrated structure. The use of a single-piece molded handle 1 and ratchet head 2 ensures the overall structural strength and durability of the tool, and can meet the needs of high-intensity, high-frequency fastening operations.

[0032] Example 3: This example differs from Example 1 in that the number of fixing grooves 504 is preferably two or three, and each fixing groove 504 is evenly distributed along the circumference of the protrusion 502. The number of positioning blocks 802 protruding inward on the inner peripheral wall of the turntable 8 is consistent with the number of fixing grooves 504. The multiple evenly distributed fixing grooves 504 change the torque transmission between the turntable 8 and the ratchet ring 5 from a single point to multiple points, significantly improving the torque bearing capacity and shear strength of the interface. The symmetrical and evenly distributed design makes the force more balanced, reduces local wear, avoids stress concentration, and thus improves the transmission smoothness and the service life of the entire coupling mechanism.

[0033] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A hose ratchet wrench, comprising a handle (1), one end of which is provided with a ratchet head (2), the ratchet head (2) having a first opening (201); a ratchet ring (5) is rotatably accommodated within the ratchet head (2), the ratchet ring (5) having a second opening (501); a ratchet mechanism is provided between the ratchet head (2) and the ratchet ring (5), the ratchet mechanism comprising a tooth (6) and a spring (7) for providing elastic force to the tooth (6); characterized in that: Both ends of the ratchet ring (5) are provided with protrusions (502), which protrude axially toward both sides of the ratchet head (2); each protrusion (502) is provided with an annular groove (503), which is coaxially arranged with the ratchet ring (5); each protrusion (502) is also provided with a radially penetrating fixing groove (504); there is at least one fixing groove (504); turntables (8) are provided on both sides of the ratchet head (2), each The turntable (8) is rotatably embedded in the corresponding annular groove (503); the turntable (8) is provided with a third opening (801), which is always aligned with the second opening (501) of the ratchet ring (5); at least one positioning block (802) is formed protruding inward on the inner peripheral wall of the turntable (8), and the positioning block (802) engages with the fixing groove (504) to achieve circumferential fixation and synchronous rotation of the turntable (8) and the ratchet ring (5).

2. The oil pipe ratchet wrench according to claim 1, characterized in that: The fixing groove (504) is a single one, and the fixing groove (504) is arranged radially opposite to the position of the second opening (501).

3. The oil pipe ratchet wrench according to claim 1, characterized in that: The number of fixing grooves (504) is two or three, and each fixing groove (504) is evenly distributed along the circumference of the protrusion (502).

4. The oil pipe ratchet wrench according to claim 1, characterized in that: The ratchet head (2) and the handle (1) are rotatably connected by a pivoting connector.

5. A hose ratchet wrench according to claim 4, characterized in that: The pivoting connector includes an elastic washer (3) and a screw (4).

6. A hose ratchet wrench according to claim 1, characterized in that: The ratchet mechanism is provided in two sets. The ratchet head (2) has two adjacent receiving cavities (202) inside. The two sets of ratchet mechanisms are respectively housed in the corresponding receiving cavities (202). The tooth cutting (6) is radially limited by the retaining ring (9).

7. A hose ratchet wrench according to claim 1, characterized in that: The handle (1) and ratchet head (2) are an integral structure.

8. A hose ratchet wrench according to any one of claims 1 to 7, characterized in that: The ratchet ring (5) is configured with a polygonal structure inside, and each pair of adjacent sides of the polygon is connected by a circular arc.

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