A wrench head

Abstract

This utility model discloses a wrench head, relating to the field of disassembly tool technology. The wrench head includes: a clamping member, which has a plate-like structure; the clamping member has an arc-shaped notch with an opening direction perpendicular to both a first direction and a second direction; a mounting plate parallel to the first direction; the clamping member is located on one side of the mounting plate; a connecting member is located on the side of the mounting plate opposite to the clamping member; in the second direction, the axis of the connecting member is offset from the clamping member; the wrench handle is a torque-controlled handle, which can be detachably connected to the wrench head via the connecting member. The inner wall of the arc-shaped notch has multiple locking protrusions; the centroid of two adjacent locking protrusions and the curvature center of the arc-shaped notch form a first angle; the angle of the first angle is equal to , where N is a positive integer greater than or equal to 12 and a multiple of 6. This wrench head is used to conveniently tighten or loosen threaded connections in confined spaces, and also facilitates the application of a specific torque when tightening threaded connections in confined spaces.

Description

Technical Field

[0001] This utility model relates to the field of disassembly tool technology, and in particular to a wrench head. Background Technology

[0002] Cable glands (also known as cable retainers or sealing connectors) are used in industrial automation to secure and protect cables. In practical applications, cable gland wiring involves first passing the cable through nuts and sealing rings before connecting terminals or routing the cable. After wiring is complete, the hexagonal nuts must be tightened; alternatively, during maintenance or repair, the hexagonal nuts on wired cable glands may need to be loosened.

[0003] However, there are significant operational limitations around the gland after wiring is completed. For example, once the cable is connected, the cable body and terminals are fixedly arranged, causing non-open-end wrenches (such as ratchet wrenches) to be obstructed by the cable, making it impossible to meet the operational requirements of this scenario. On the other hand, conventional open-end wrenches, due to their large operating space requirements, need a large operating angle to allow the outer wall of the hexagonal nut to fit against the wrench's locking opening through multiple rotations. However, in the above scenario, the operating space is small, resulting in a smaller operating angle, making it difficult for conventional open-end wrenches to meet the operational requirements of this scenario as well.

[0004] Therefore, there is an urgent need for a wrench head to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a wrench head for conveniently tightening or loosening threaded connections in confined spaces, and for conveniently applying a specific torque when tightening threaded connections in confined spaces.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a wrench head, which includes: a clamping component, a mounting plate, and a connecting component. The clamping member has a plate-like structure; it has an arc-shaped notch for clamping the threaded connector; the opening direction of the arc-shaped notch is perpendicular to both a first direction and a second direction; the first direction is the axial extension direction of the threaded connector; the second direction is the extension direction of the wrench handle; the mounting plate has a plate-like structure; the surface of the mounting plate is parallel to the first direction; the clamping member is disposed on one side of the mounting plate and perpendicular to the surface of the mounting plate; the connecting member has a columnar structure; it extends along the second direction and is disposed on the side of the mounting plate opposite to the clamping member; in the second direction, the axis of the connecting member is offset from the plane of the clamping member; the wrench handle is a torque-controlled handle and can be detachably connected to the wrench head via the connecting member; the inner wall of the arc-shaped notch has multiple locking protrusions; a locking groove is formed between two adjacent locking protrusions; the centroid of two adjacent locking protrusions and the curvature center of the arc-shaped notch form a first angle; the angle of the first angle is equal to... N is a positive integer greater than or equal to 12 and a multiple of 6.

[0008] In some embodiments, the angle of the first included angle is equal to 30°.

[0009] In some embodiments, the locking protrusion has a triangular cross-sectional shape along the first reference surface; and / or, the locking groove has an inverted triangular cross-sectional shape along the first reference surface; the first reference surface is perpendicular to the first direction and is parallel to the second direction.

[0010] In some embodiments, the arc-shaped notch is C-shaped.

[0011] In some embodiments, the cross-sectional shape of the connector along the second reference plane is a regular polygon; the second reference plane is perpendicular to the second direction and is arranged parallel to the first direction.

[0012] In some embodiments, the connector has a first connection through hole; the wrench handle can be detachably connected to the connector through the first connection through hole.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a wrench head that incorporates a locking element with a plate-like structure. This allows the locking element to extend into confined spaces to tighten or loosen threaded connections. An arc-shaped notch is formed on the locking element, with its opening direction perpendicular to both the axial extension direction of the threaded connection and the extension direction of the wrench handle. This design ensures that, since the opening direction of the arc-shaped notch is perpendicular to the extension direction of the wrench handle (unlike the case of ordinary wrenches where the locking notch opening is parallel to the extension direction of the handle, the wrench handle is more likely to interfere with other components in confined spaces), the wrench head is more secure. When using this wrench head to tighten or loosen threaded connections in confined spaces, the wrench head can move over a wider range of motion, thus facilitating the tightening or loosening of threaded connections in confined spaces. Furthermore, the wrench head can be connected to an adjustable torque handle via a connector, making it suitable for both tightening and loosening threaded connections in confined spaces, and applying a specific torque when tightening, significantly improving the wrench head's practicality and convenience in tightening or loosening threaded connections in confined spaces. Further, multiple locking protrusions are provided on the inner wall of the arc-shaped notch. Connecting the centroid of two adjacent locking protrusions with the center of curvature of the arc-shaped notch forms a first included angle, which is set to be equal to... Furthermore, N is set to a positive integer greater than or equal to 12 and a multiple of 6. This allows the angular structure on the threaded connector (e.g., an external hex bolt) to engage with the locking groove between two adjacent locking protrusions when tightening or loosening the threaded connector using the aforementioned wrench head. This allows the torque applied by the operator to be easily transmitted to the threaded connector, facilitating tightening or loosening. Simultaneously, this design reduces the operating angle of the wrench head, or the angle required to complete one effective tightening operation. In confined spaces, only a small rotation is needed to reposition and engage the multiple locking protrusions on the inner wall of the arc-shaped notch with the threaded connector, reducing the required operating space and further improving the practicality of the wrench head and the convenience of tightening or loosening threaded connectors in confined spaces. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a wrench head provided in a specific embodiment of this utility model.

[0016] In the picture:

[0017] 1. Clamping element; 11. Arc-shaped notch; 111. Locking protrusion; 112. Locking groove; 2. Mounting plate; 3. Connecting element; 31. First connecting through hole;

[0018] X1, first direction; X2, second direction; P1, first reference plane; P2, second reference plane; a1, first included angle. Detailed Implementation

[0019] The present invention 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 merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0023] like Figure 1 As shown, this embodiment provides a wrench head, which includes a clamping member 1, a mounting plate 2, and a connecting member 3.

[0024] The aforementioned clamping member 1 has a plate-like structure. For example, the clamping member 1 can be a rectangular plate, a circular plate, or an elliptical plate. An arc-shaped notch 11 is provided on the clamping member 1 for clamping a threaded connector. This threaded connector is, for example, a bolt or a threaded post, a fastening structure with threads. The opening direction of the arc-shaped notch 11 is perpendicular to both a first direction X1 and a second direction X2. Here, the first direction X1 is the axial extension direction of the threaded connector; and the second direction X2 is the extension direction of the wrench handle that can be connected to the wrench head. Exemplarily, the arc-shaped notch 11 on the clamping member 1 opens vertically, while the extension direction of the wrench handle is horizontal.

[0025] The mounting plate 2 described above also has a plate-like structure. For example, the mounting plate 2 can be rectangular, circular, or elliptical. The surface of the mounting plate 2 is parallel to the first direction X1 (i.e., the axial extension direction of the threaded connector), in other words, the threaded connector is parallel to the surface of the mounting plate 2. The clamping member 1 is located on one side of the mounting plate 2 and is perpendicular to the surface of the mounting plate 2. For example, the clamping member 1 is rectangular, and the mounting plate 2 is also rectangular, with the two rectangular plate-like structures perpendicular to each other. In other words, the clamping member 1 and the mounting plate 2 combine to form an L-shaped structure. Here, the connection between the clamping member 1 and the mounting plate 2 can be, for example, welding or snap-fitting.

[0026] The aforementioned connector 3 has a columnar structure. This connector 3 extends along the second direction X2. Furthermore, this connector 3 is located on the side of the mounting plate 2 opposite to the clamping member 1. Here, the connection method between the connector 3 and the mounting plate 2 is, for example, welding or snap-fitting. Figure 1 Taking the shown perspective as an example, the aforementioned clamping member 1 is located on the right side of the mounting plate 2, and the aforementioned connecting member 3 is located on the left side of the mounting plate 2. In the aforementioned second direction X2, the axis of the connecting member 3 is offset from the plane where the aforementioned clamping member 1 is located. In other words, in the second direction X2, the axis of the connecting member 3 does not pass through the aforementioned clamping member 1, or in other words, the axis of the connecting member 3 is located to the side of the plate-shaped clamping member 1. For example, the aforementioned mounting plate 2 is a rectangular plate-shaped structure, the aforementioned clamping member 1 is located on one side of the rectangular plate-shaped structure, and the aforementioned connecting member 3 is located on the opposite side of the rectangular plate-shaped structure or in the middle of the rectangular plate-shaped structure.

[0027] The aforementioned wrench handle is an adjustable torque handle, which can be detachably connected to the handle head via the aforementioned connector 3. The specific structure of the wrench handle to achieve adjustable torque can be designed with reference to relevant technologies. The inventive point of this embodiment lies in the structural design of the wrench head, not in the specific structural design of the adjustable torque handle; therefore, the specific structure of the adjustable torque handle will not be described in this embodiment.

[0028] Multiple locking protrusions 111 are provided on the inner wall of the aforementioned arc-shaped notch 11. A locking groove 112 is formed between two adjacent locking protrusions 111. Alternatively, the inner wall of the arc-shaped notch 11 of the aforementioned clamping member 1 is provided with multiple locking grooves 112, the extending direction of which is parallel to the first direction X1 (i.e., the axial extension direction of the threaded connector), and a locking protrusion 111 is formed between two adjacent locking grooves 112. Figure 1 As shown, the line connecting the centroid of two adjacent locking protrusions 111 and the curvature center of the arc-shaped notch 11 forms a first included angle α1, the angle of which is equal to Where N is a positive integer greater than or equal to 12 and a multiple of 6. For example, the angle a1 of the first included angle is 30°, that is, N equals 12. It is easy to understand that N can also be a positive integer such as 18 or 24. Those skilled in the art can set it according to actual usage needs; an exhaustive list is not provided here.

[0029] Therefore, the wrench head provided in this embodiment, by setting a clamping member 1, has a plate-like structure, which allows the clamping member 1 to extend into a relatively narrow space to tighten or loosen threaded connections. An arc-shaped notch 11 is provided on the clamping member 1, and the opening direction of the arc-shaped notch 11 is set to be perpendicular to both the axial extension direction of the threaded connection and the extension direction of the wrench handle. This ensures that, because the opening direction of the arc-shaped notch 11 is perpendicular to the extension direction of the wrench handle (the opening direction of the clamping notch on a regular wrench head is parallel to the extension direction of the wrench handle, making it easier for the wrench handle to collide with other components in a narrow space), the wrench handle can easily collide with other components in a narrow space. (Component interference) When using this wrench head to tighten or loosen threaded connections in confined spaces, the wrench head can move a wider range of motion, thus facilitating the tightening or loosening of threaded connections in confined spaces. Furthermore, the wrench head can be connected to an adjustable torque handle via connector 3, making it suitable for both tightening and loosening threaded connections in confined spaces, and applying a specific torque when tightening, significantly improving the wrench head's practicality and convenience in tightening or loosening threaded connections in confined spaces. Further, multiple locking protrusions 111 are provided on the inner wall of the arc-shaped notch 11. Connecting the centroid of two adjacent locking protrusions 111 with the center of curvature of the arc-shaped notch 11 forms a first included angle α1, and the angle α1 is set to equal to... Furthermore, N is set to a positive integer greater than or equal to 12 and a multiple of 6. This allows the angular structure on the threaded connector (e.g., an external hex bolt) to engage with the locking groove 112 between two adjacent locking protrusions 111 when tightening or loosening the threaded connector using the aforementioned wrench head. This facilitates the transmission of torque applied to the wrench head to the threaded connector, making it easier to tighten or loosen the connector. Simultaneously, this design reduces the operating angle of the wrench head, or the angle required for effective tightening. In confined spaces, only a small rotation is needed to reposition and engage the multiple locking protrusions 111 on the inner wall of the arc-shaped notch 11 with the threaded connector, reducing the required operating space and further improving the practicality of the wrench head and the convenience of tightening or loosening threaded connectors in confined spaces.

[0030] In some embodiments, such as Figure 1As shown, the locking protrusion 111 on the inner wall of the aforementioned arc-shaped notch 11 has a triangular cross-sectional shape along the first reference plane P1. Alternatively, the locking groove 112 on the inner wall of the aforementioned arc-shaped notch 11 has an inverted triangular cross-sectional shape along the first reference plane P1. Here, the first reference plane P1 is perpendicular to the first direction X1 and parallel to the second direction X2. With this configuration, the locking protrusion 111 can have a sharp apex and inclined sidewalls, forming an "embedded" fit with the angular structure of common threaded fasteners (hexagonal bolts). That is, the angularity of the hexagonal bolt will fit tightly against the two inclined surfaces of the locking protrusion 111, enhancing the locking ability of the locking protrusion 111 and preventing slippage during the tightening or loosening of the threaded fastener. Meanwhile, the inclined surfaces of the locking protrusions 111 all have a natural guiding function. When the arc-shaped notch 11 of the wrench head is fitted onto the external hexagonal bolt, the angular structure of the external hexagonal bolt will automatically align with the locking groove 112 between two adjacent locking protrusions 111 along the inclined surface of the locking protrusions 111. This eliminates the need for precise alignment by the operator, making it convenient for use in confined spaces or blind operation scenarios, and further improving the practicality of the wrench head.

[0031] In some embodiments, the arc-shaped notch 11 on the clamping member 1 is C-shaped. This arrangement allows the inner wall of the arc-shaped notch 11 to form a longer continuous arrangement space, and allows more locking protrusions 111 to be evenly arranged along the inner wall of the arc-shaped notch 11, maximizing the number of locking protrusions 111 and significantly enhancing the clamping and anti-slip capabilities of the arc-shaped notch 11 on the clamping member 11, further preventing slippage during tightening or loosening of the threaded connection.

[0032] In some embodiments, such as Figure 1 As shown, the cross-sectional shape of the connecting member 3 along the second reference plane P2 is a regular polygon. Here, the second reference plane P2 is perpendicular to the second direction X2 and parallel to the first direction X1. For example, the cross-sectional shape of the second reference plane P2 of the connecting member 3 is a square, a regular pentagon, or a regular hexagon, etc. By setting it in this way, it is possible to prevent the wrench handle from rotating around its own axis after it is connected to the wrench head through the connecting member 3, thereby further improving the reliability of the wrench head when tightening or loosening threaded connections.

[0033] In some embodiments, such as Figure 1As shown, the connector 3 has a first connecting through hole 31. The wrench handle can be detachably connected to the connector 3 through the first connecting through hole 31. For example, a blind connecting hole is provided at the end of the wrench handle along its extension direction, and a third connecting through hole is provided perpendicular to the extension direction of the wrench handle, penetrating the blind connecting hole. After inserting the connector 3 on the wrench head into the blind connecting hole on the wrench handle, a locking element (such as a locking pin, locking bolt, etc.) is inserted through the third connecting through hole on the wrench handle and the first connecting through hole 31 on the connector 3, thus achieving a detachable connection between the wrench handle and the connector 3. The structure is simple and easy to use.

[0034] In some embodiments, the connector 3 is further provided with a second connecting through hole. In the second direction X2, the second connecting through hole and the first connecting through hole 31 are spaced apart. The wrench handle can be detachably connected to the connector 3 through the first connecting through hole 31 and the second connecting through hole. This arrangement improves the firmness of the connection between the wrench handle and the wrench head. For example, a blind connecting hole is provided at the end of the wrench handle along its extension direction, and a third connecting through hole and a fourth connecting through hole are provided perpendicular to the extension direction of the wrench handle. After inserting the connector 3 on the wrench head into the blind connecting hole on the wrench handle, locking elements (such as locking pins, locking bolts, etc.) are respectively inserted through the third connecting through hole on the wrench handle and the first connecting hole on the connector 3, and the fourth connecting through hole on the wrench handle and the second connecting through hole on the connector 3, thus achieving a detachable connection between the wrench handle and the connector 3. The structure is simple and easy to use.

[0035] In some embodiments, the axis of the second connecting through hole is perpendicular to the axis of the first connecting through hole 31. This arrangement further enhances the firmness of the connection between the wrench handle and the wrench head.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wrench head, characterized in that, include: The clamping component (1) has a plate-like structure; the clamping component (1) has an arc-shaped notch (11) for clamping the threaded connector; the opening direction of the arc-shaped notch (11) is perpendicular to both the first direction (X1) and the second direction (X2); the first direction (X1) is the axial extension direction of the threaded connector; the second direction (X2) is the extension direction of the wrench handle. Mounting plate (2) has a plate-like structure; the plate surface of the mounting plate (2) is parallel to the first direction (X1); the clamping member (1) is disposed on one side of the mounting plate (2) and is perpendicular to the plate surface of the mounting plate (2); The connector (3) has a columnar structure; the connector (3) extends along the second direction (X2) and is disposed on the side of the mounting plate (2) away from the clamping member (1); in the second direction (X2), the axis of the connector (3) is offset from the plane where the clamping member (1) is located; The wrench handle is an adjustable torque handle, which can be detachably connected to the wrench head through the connector (3); The inner wall of the arc-shaped notch (11) is provided with a plurality of locking protrusions (111); a locking groove (112) is formed between two adjacent locking protrusions (111); the centroid of two adjacent locking protrusions (111) and the curvature center of the arc-shaped notch (11) form a first included angle (a1); the angle of the first included angle (a1) is equal to N is a positive integer greater than or equal to 12 and a multiple of 6.

2. The wrench head according to claim 1, characterized in that, The angle of the first included angle (a1) is 30°.

3. The wrench head according to claim 1, characterized in that, The locking protrusion (111) has a triangular cross-sectional shape along the first reference plane; and / or, the locking groove (112) has an inverted triangular cross-sectional shape along the first reference plane; the first reference plane (P1) is perpendicular to the first direction (X1) and is parallel to the second direction (X2).

4. The wrench head according to claim 1, characterized in that, The arc-shaped notch (11) is C-shaped.

5. The wrench head according to claim 1, characterized in that, The cross-sectional shape of the connector (3) along the second reference plane is a regular polygon; the second reference plane (P2) is perpendicular to the second direction (X2) and is parallel to the first direction (X1).

6. The wrench head according to any one of claims 1 to 5, characterized in that, The connector (3) has a first connecting through hole (31); the wrench handle can be detachably connected to the connector (3) through the first connecting through hole (31).

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