Anti-slip high-torsion transmission nut and driving tool thereof

Abstract

The invention discloses an anti-slip high-torsion transmission nut and a driving tool thereof. The high-torsion transmission nut comprises a nut body, the nut body comprises four driving wall parts and four guide wall parts which respectively extend straightly and are connected with the driving wall parts, and the ratio of the longest distance between any two non-adjacent driving wall parts to the longest distance between any two adjacent driving wall parts is larger than 1.16. Therefore, slipping of the driving tool or the wrench during driving can be greatly reduced, each driving wall portion is provided with a cambered surface section and two straight surface sections, the two straight surface sections extend inwards from the two opposite ends of the cambered surface section respectively and are connected with the two guiding wall portions, the central angle of each cambered surface section is smaller than 180 degrees, and the central angle of each straight surface section is smaller than 180 degrees. The arc-shaped outline can avoid abrasion in the driving process, so that good transmission torsion is maintained, the stability in the locking process is improved, and the effect of reducing the operation difficulty is achieved.

Description

Technical Field

[0001] The invention relates to a nut and a tool for driving the nut, in particular to an anti-slip high torque transmission nut and a driving tool thereof. Background Art

[0002] A general hexagonal nut is generally in the shape of a hexagonal column and defines a screw hole that penetrates axially. The hexagonal nut can be driven to rotate by turning its outer peripheral surface with a wrench, so that the screw hole in the center can be screwed onto the bolt to produce a locking effect. However, the hexagonal nut has multiple sharp edges, so it is easy to wear during the locking process, resulting in a reduction in the force-bearing area, and ultimately resulting in a decrease in the transmitted torque. If the damage to the corners of the hexagonal nut continues to increase, the corners will appear arc-shaped, and ultimately cause the hexagonal nut to slip easily when driven. In particular, when the hexagonal nut has been installed for a period of time and the thread is somewhat rusted, a greater force must be applied to loosen the hexagonal nut. At this time, the problem of the hexagonal nut being easy to slip and wear will greatly increase the difficulty of the operation. Summary of the invention

[0003] The object of the present invention is to provide a nut which can reduce wear and is not easy to slip off.

[0004] The anti-slip high torque transmission nut of the present invention comprises: a nut body surrounding a circular hole, the nut body comprising four driving wall portions which are arranged in an annular shape at equal angles and spaced from each other, and four guide wall portions which extend straightly and connect the driving wall portions, the ratio of the longest distance between any two non-adjacent driving wall portions to the longest distance between any two adjacent driving wall portions is greater than 1.16, each driving wall portion has an arc surface segment, and two straight surface segments which extend inward from opposite ends of the arc surface segment and connect two of the guide wall portions, and the central angle of the arc surface segment is less than 180 degrees.

[0005] Preferably, in the aforementioned anti-slip high torque transmission nut, the radius of curvature of the arc surface segment of each driving wall portion is greater than the length of each straight surface segment.

[0006] Preferably, in the aforementioned anti-slip high torque transmission nut, the circular hole has an internal thread.

[0007] Another object of the present invention is to provide a driving tool capable of driving the aforementioned nut.

[0008] The driving tool of the present invention is used to drive the anti-slip high-torque transmission nut as described above, and the driving tool includes a tool body, and the tool body includes four driving wall portions which are arranged in an equiangular ring and spaced from each other, and four guide wall portions which extend straightly and are connected to the corresponding driving wall portions. The driving wall portions and the guide wall portions of the tool body cooperate to define a driving groove around, and the ratio of the longest distance between any two non-adjacent driving wall portions of the tool body to the longest distance between any two adjacent driving wall portions is greater than 1.16. Each driving wall portion of the tool body has an arc surface segment, and two straight surface segments which extend inward from opposite ends of the corresponding arc surface segment and connect the corresponding two guide wall portions. The central angle of the arc surface segment of the tool body is less than 180 degrees.

[0009] Preferably, in the aforementioned driving tool, the radius of curvature of the arc surface segment of each driving wall portion of the tool body is greater than the length of each straight surface segment.

[0010] The beneficial effect of the present invention is that: since the ratio of the longest distance between any two non-adjacent driving wall parts of the high torque transmission nut to the longest distance between any two adjacent driving wall parts is greater than 1.16, which is greater than the maximum ratio of the diagonal angle to the opposite side of the regular hexagon, 1.1547, the slippage of the driving tool or wrench during driving can be greatly reduced, and the arc profile of the arc surface segment can avoid wear during the driving process, thereby maintaining good transmission torque, thereby improving the stability of the locking process and achieving the effect of reducing the difficulty of operation. The straight face segment can effectively increase the contact area between the high torque transmission nut and the driving tool, improve the meshing degree and stability of the two during the locking process, and eliminate the loss of transmission torque caused by the decrease in meshing degree due to process tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a top view illustrating an embodiment of a high torque transmission nut that prevents slipping of the present invention;

[0012] Figure 2 is a schematic diagram illustrating a nut body in the embodiment;

[0013] Figure 3 It is a three-dimensional diagram, indicating Figure 1 The three-dimensional form;

[0014] Figure 4 is a side cross-sectional view illustrating the use of the high torque transmission nut and the bolt in cooperation;

[0015] Figure 5 is a schematic diagram illustrating the state of using a wrench to drive the high torque transmission nut;

[0016] Figure 6is a perspective view illustrating an embodiment of a driving tool of the present invention; and

[0017] Figure 7 is a top view illustrating the drive groove of the drive tool. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0019] See also Figure 1 , Figure 2 ,and Figure 3 The embodiment of the anti-slip high torque transmission nut 1 of the present invention comprises a nut body 11 surrounding and defining a circular hole 12 with internal threads. The nut body 11 comprises four driving wall portions 111 arranged in an equiangular ring and spaced from each other, and four guide wall portions 112 extending straightly and connecting the driving wall portions 111. The ratio of the longest distance B between any two non-adjacent driving wall portions 111 to the longest distance A between any two adjacent driving wall portions 111 is greater than 1.16 (i.e., B / A>1.16), and this ratio is designed to be greater than the ratio of the opposite angle to the opposite side of a regular hexagon, which is 1.1547, thereby greatly reducing the slippage during driving. Each driving wall portion 111 has a curved surface segment 113 and two straight surface segments 114 extending inward from opposite ends of the curved surface segment 113 and connecting two of the guide wall portions 112. The central angle of the curved surface segment 113 is less than 180 degrees, so the arc length of the curved surface segment 113 is less than the arc length of a semicircle with the same radius, and the curvature radius C of the curved surface segment 113 is also greater than the length D of each straight surface segment 114. The design of the straight surface segment 114 can make it easier to remove the mold from the mold during the molding process of the high torque transmission nut 1, thereby reducing the risk of mold damage and increasing its service life.

[0020] See also Figure 3 , Figure 4 ,and Figure 5 , the high torque transmission nut 1 can be screwed into the external thread of the bolt E by applying force with the fingertips, and then the high torque transmission nut 1 can be tightened by driving with a general wrench F, and finally the bolt E can be driven with an electric tool gun as needed to further tighten the bolt E and the high torque transmission nut 1. When applying force with the fingertips, the arc design of the arc surface segment 113 can greatly reduce the discomfort of the fingertips, and the design of the protruding driving wall portion 111 relative to the guide wall portion 112 can also produce abutment when the user twists the high torque transmission nut 1 with his fingers, making it easy for the user to apply force and not easy to slip, thereby improving construction efficiency.

[0021] Due to the shape and easy wear characteristics of general hexagonal nuts, it is impossible to stably maintain the transmission torque. This causes that each time the hexagonal nut is twisted, it often slips before turning to 90 degrees and cannot continue to turn. It is necessary to re-align and twist again, which is very time-consuming. When the high-torque transmission nut 1 is driven by the wrench F, the arc profile of the arc surface segment 113 can avoid wear during the driving process, thereby stably maintaining good transmission torque. Therefore, each time the wrench F is used to twist, the high-torque transmission nut 1 can be stably rotated to nearly 90 degrees, achieving the effect of saving time. When the bolt E is driven by an electric tool gun, the characteristic of the high-torque transmission nut 1 that it is not easy to slip can overcome the vibration generated by the operation of the electric tool gun, thereby maintaining safety during locking.

[0022] The design of the high torque transmission nut 1 not only makes it beautiful and special in appearance, but also when it is locked on the bolt E to fix the workpieces G and H, the contact area between the driving wall portion 111 and the workpiece G is larger than that of a general hexagonal nut. This makes it less likely to damage the surface of the workpiece G when the high torque transmission nut 1 is locked on the workpiece G made of a softer material because the pressure is reduced due to the larger contact area, and thus locking can be performed without using a washer.

[0023] See also Figure 6 and Figure 7 The embodiment of the driving tool 2 of the present invention comprises a tool body 21. The tool body 21 comprises four driving wall portions 211 arranged in an equiangular ring and spaced from each other, and four guide wall portions 212 extending straightly and connecting the driving wall portions 211, and the driving wall portions 211 cooperate with the guide wall portions 212 to define a driving groove 213. The ratio of the longest distance between any two non-adjacent driving wall portions 211 to the longest distance between any two adjacent driving wall portions 211 is greater than 1.16, and each driving wall portion 211 has an arc segment 214, and two straight segments 215 extending inward from opposite ends of the arc segment 214 and connecting two of the guide wall portions 212. The radius of curvature of each of the arc surface segments 214 is greater than the length of each of the straight surface segments 215, and the central angle of the arc surface segment 214 is less than 180 degrees, so the arc length of the arc surface segment 214 is less than the arc length of a semicircle with the same radius. Accordingly, the straight surface segment 215 connected to the arc surface segment 214 can reach a certain length, and the straight surface segment 114 of the driving wall portion 111 of the nut body 11 and the straight surface segment 215 of the driving wall portion 211 of the tool body 21 can effectively increase the contact area between the driving tool 2 and the high torque transmission nut 1, thereby increasing the meshing degree between the two and the stability during locking, thereby eliminating the loss of transmission torque caused by the decrease in meshing degree due to process tolerance.

[0024] In summary, since the ratio of the longest distance B between any two non-adjacent driving wall portions 111 of the high torque transmission nut 1 to the longest distance A between any two adjacent driving wall portions 111 is greater than 1.16, which is greater than the maximum ratio of the diagonal angle to the opposite side of a regular hexagon, 1.1547, the slippage of the driving tool 2 or the wrench F when driving the high torque transmission nut 1 can be greatly reduced, and the arc profile of the arc surface segment 113 can avoid wear during the driving process, thereby maintaining a good transmission torque, thereby improving the stability of the locking process and achieving the effect of reducing the difficulty of the operation. The straight surface segment 114 of the driving wall portion 111 of the nut body 11 and the straight surface segment 215 of the driving wall portion 211 of the tool body 21 can effectively increase the contact area between the high torque transmission nut 1 and the driving tool 2, improve the meshing degree and stability of the two during the locking process, and eliminate the loss of transmission torque caused by the decrease in meshing degree due to process tolerance, so the purpose of the present invention can be achieved.

[0025] The above description is only a preferred embodiment of the present invention, but it is not intended to limit the scope of the present invention. Any person familiar with this technology can make further improvements and changes on this basis without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of this application.

Claims

1. A high torque transmission nut that prevents slipping, characterized in that: The anti-slip high-torque transmission nut includes a nut body surrounding a circular hole, the nut body includes four driving wall portions which are arranged in an equiangular ring and spaced apart from each other, and four guide wall portions which extend straightly and connect the driving wall portions, the ratio of the longest distance between any two non-adjacent driving wall portions to the longest distance between any two adjacent driving wall portions is greater than 1.16, each driving wall portion has an arc surface segment, and two straight surface segments which extend inward from opposite ends of the arc surface segment and connect two of the guide wall portions, and the central angle of the arc surface segment is less than 180 degrees.

2. The anti-slip high torque transmission nut according to claim 1, characterized in that: The radius of curvature of the arc surface segment of each driving wall portion is greater than the length of each straight surface segment.

3. The anti-slip high torque transmission nut according to claim 1, characterized in that: The circular hole has an internal thread.

4. A driving tool for driving the anti-slip high torque transmission nut according to claim 1, characterized in that: The driving tool includes a tool body, which includes four driving wall portions arranged in an equiangular ring and spaced apart from each other, and four guide wall portions each extending straight and connected to the corresponding driving wall portions. The driving wall portions and the guide wall portions of the tool body cooperate to define a driving groove. The ratio of the longest distance between any two non-adjacent driving wall portions of the tool body to the longest distance between any two adjacent driving wall portions is greater than 1.

16. Each driving wall portion of the tool body has an arc surface segment, and two straight surface segments extending inward from opposite ends of the corresponding arc surface segment and connecting the corresponding two guide wall portions. The central angle of the arc surface segment of the tool body is less than 180 degrees.

5. The driving tool according to claim 4, characterized in that: The radius of curvature of the arc surface segment of each driving wall portion of the tool body is greater than the length of each straight surface segment.

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