Special drill jig for hexagonal nut inclined hole

Abstract

The utility model discloses a special drill jig for a hexagonal nut inclined hole, which comprises an upper V-shaped block and a lower V-shaped block, the upper V-shaped block and the lower V-shaped block are oppositely arranged, one end of the upper V-shaped block and one end of the lower V-shaped block are hinged together to form a C-shaped drill jig integrally, a hexagonal nut is arranged in the drill jig, and the upper V-shaped block and the lower V-shaped block are respectively positioned by two opposite angles of the hexagonal nut; the ends, away from the hinge point, of the upper V-shaped block and the lower V-shaped block are each provided with a vertical drilling sleeve perpendicular to the inclined face of the hexagon nut and an inclined hole drilling sleeve used for drilling an inclined hole. A locking structure is arranged on the side face of the drill jig. The vertical drilling sleeves perpendicular to the inclined plane of the hexagon nut and the inclined hole drilling sleeves used for drilling inclined holes are arranged at the ends, away from the hinge point, of the upper V-shaped block and the lower V-shaped block, reverse inclined holes are drilled in advance through the vertical drilling sleeves, then inclined plane anti-loosening holes are drilled through the inclined hole drilling sleeves, and therefore the influence of the inclined plane on unbalance loading of a drill bit can be eliminated, and the anti-loosening effect of the hexagon nut is improved. And the service life of the drill bit is prolonged.

Description

Technical Field

[0001] This utility model relates to a special drilling jig for hexagonal nuts with oblique holes. Background Technology

[0002] In machining, drilling holes in the beveled surface of a hexagonal nut is very difficult, such as Figure 1 As shown, this is because when drill bit 1 contacts the inclined surface of hexagonal nut 2 ( Figure 1 The drill bit will cut on one side and be subjected to a reverse force F from the inclined plane. The reverse force F is decomposed into two components, fx and fy. fx will cause the drill bit 1 to bend. If the operation is not careful or properly controlled, the drill bit 1 will break.

[0003] like Figure 2 As shown, if drill jig 3 is used to guide drill bit 1, when drill bit 1 contacts the inclined plane, it will still cut on one side and be subjected to a radial force fx from the inclined plane on the cutting head. The radial force will be transferred to the inner wall of drill bushing 4. Although it offsets the reaction force fx' of the drill bushing, it will increase the wear of drill bushing 4 and reduce the life of drill jig 3. Therefore, the existing drilling process has a high cost for machining anti-loosening holes on the inclined plane of hexagonal nuts. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a special drilling jig for hexagonal nuts with simple structure and reliable operation.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is: a special drill jig for hexagonal nuts with inclined holes, including an upper V-block and a lower V-block, the upper V-block and the lower V-block are arranged opposite each other and hinged together at one end to form a drill jig with an overall C-shape, the hexagonal nut is placed in the drill jig, and the upper V-block and the lower V-block are respectively positioned at two opposite corners of the hexagonal nut; the upper V-block and the lower V-block are each provided with a vertical drilling sleeve perpendicular to the inclined surface of the hexagonal nut and an inclined drilling sleeve for drilling inclined holes at the end away from the hinge point; the side of the drill jig is provided with a locking structure.

[0006] The aforementioned special drilling jig for hexagonal nut inclined holes includes a locking structure comprising a tension bolt and a tension nut. Two mounting seats are symmetrically arranged on both sides of the upper V-block, and the upper ends of the two tension bolts are respectively hinged to the two mounting seats. Two fixing seats are symmetrically arranged on both sides of the lower V-block, and the lower ends of the two tension bolts are respectively locked onto the fixing seats and secured with tension nuts.

[0007] The aforementioned drilling jig for hexagonal nuts with oblique holes has a slot on the fixed base for inserting tension bolts.

[0008] In the aforementioned special drilling jig for hexagonal nut inclined holes, one end of the upper V-block and the lower V-block are hinged together by a movable pin.

[0009] The beneficial effects of this utility model are as follows: On the upper V-block and the lower V-block, at the end away from the hinge point, there is a vertical drilling sleeve perpendicular to the inclined surface of the hexagonal nut and an inclined hole drilling sleeve for drilling inclined holes. First, a reverse inclined hole is pre-drilled through the vertical drilling sleeve, and then the inclined anti-loosening hole is drilled through the inclined hole drilling sleeve. This can eliminate the influence of the inclined surface on the drill bit's off-center load, thereby improving the quality of the anti-loosening hole and the life of the drill bit. Attached Figure Description

[0010] Figure 1 This is a force analysis diagram of a drill bit drilling an inclined plane.

[0011] Figure 2 This is a force analysis diagram when a drill bit is guided by a drill jig to drill an inclined plane.

[0012] Figure 3 This is a schematic diagram of the structure of this utility model.

[0013] Figure 4 for Figure 3 The left view.

[0014] Figure 5 This is a schematic diagram of the loosened state of a special drill jig for a hexagonal nut with an angled hole.

[0015] Figure 6 This is a schematic diagram of the upper V-shaped block.

[0016] Figure 7 This is a schematic diagram of the lower V-shaped block.

[0017] Figure 8 This is a schematic diagram showing the state of drilling a vertical hole according to this utility model.

[0018] Figure 9 This is a schematic diagram showing the state of drilling a slanted hole according to this utility model.

[0019] Figure 10 This is a schematic diagram illustrating the force analysis for drilling vertical and inclined holes.

[0020] Figure 11 for Figure 10 Enlarged view of part I in the middle. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 3-7As shown, a special drill jig for hexagonal nuts with inclined holes includes an upper V-block 5 and a lower V-block 6. The upper V-block 5 and the lower V-block 6 are arranged opposite each other and are hinged together at one end by a movable pin 7 to form a drill jig with an overall C-shape. The hexagonal nut 2 is placed inside the drill jig. The upper V-block 5 and the lower V-block 6 are positioned at two opposite corners of the hexagonal nut 2, respectively. The upper V-block 5 and the lower V-block 6 are each provided with a vertical drilling sleeve 8 that is perpendicular to the inclined surface of the hexagonal nut 2 and an inclined drilling sleeve 9 for drilling inclined holes at the ends away from the hinge point. The side of the drill jig is provided with a locking structure.

[0023] The locking structure includes tension bolts 10 and tension nuts 11. Two mounting seats 12 are symmetrically arranged on both sides of the upper V-block 5. The upper ends of the two tension bolts 10 are respectively hinged to the two mounting seats 12. Two fixing seats 13 are symmetrically arranged on both sides of the lower V-block 6. The fixing seats 13 are provided with slots 14 for the tension bolts 10 to be inserted. The lower ends of the two tension bolts 10 are respectively inserted into the slots 14 of the fixing seats 13 and locked with tension nuts 11.

[0024] like Figures 8-11 As shown, the principle of this utility model is to utilize the offsetting of symmetrical forces. The point where the drill bit contacts the inclined surface of the hexagonal nut 2 is taken as the drilling point. A vertical inclined hole is drilled on the vertical inclined surface at the drilling point. The depth of the vertical inclined hole is the diameter of the drill bit. Then, an anti-loosening hole is drilled on the inclined surface of the hexagonal nut 2 at the vertical inclined hole. When the drill bit contacts the inclined surface of the vertical inclined hole, a reverse force fx' is generated on the inclined surface of the vertical inclined hole. The reverse force fx' on the inclined surface of the vertical inclined hole is equal in magnitude and opposite in direction to the radial force fx exerted by the inclined surface of the hexagonal nut 2 on the tool. The eccentric load forces cancel each other out, avoiding the problem of drill bit breakage caused by eccentric load.

Claims

1. A special drilling jig for hexagonal nuts with angled holes, characterized in that: It includes an upper V-block and a lower V-block, which are arranged opposite each other and hinged together at one end to form a C-shaped drill jig. A hexagonal nut is placed inside the drill jig, and the upper V-block and the lower V-block are positioned at two opposite corners of the hexagonal nut. The upper V-block and the lower V-block are each provided with a vertical drill sleeve perpendicular to the inclined surface of the hexagonal nut and an inclined drill sleeve for drilling inclined holes at the ends away from the hinge point. The drill jig is provided with a locking structure on the side.

2. The special drilling jig for hexagonal nut inclined holes according to claim 1, characterized in that: The locking structure includes tension bolts and tension nuts. Two mounting seats are symmetrically arranged on both sides of the upper V-block. The upper ends of the two tension bolts are respectively hinged to the two mounting seats. Two fixing seats are symmetrically arranged on both sides of the lower V-block. The lower ends of the two tension bolts are respectively locked onto the fixing seats and tightened with tension nuts.

3. The special drilling jig for hexagonal nut inclined holes according to claim 2, characterized in that: The mounting base is provided with a slot for the tension bolt to be inserted.

4. The special drilling jig for hexagonal nut inclined holes according to claim 1, characterized in that: The upper V-block and the lower V-block are hinged together at one end by a movable pin.

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