Diameter-variable drill jig tool

Abstract

The utility model discloses a variable-diameter drill jig tool which comprises a drill jig body with the adjustable diameter, arc grooves are evenly distributed in the circumference of the drill jig body, and push rods can be embedded in the arc grooves. The replaceable inner diameter bushing is arranged in the drill jig main body and is used for adapting to workpieces with different diameters; the locking structure comprises a top cover plate 110 and a knurled adjusting screw, the inner and outer gear meshing mechanism comprises an inner gear cover and a gear ring, the gear ring is meshed with the inner gear cover, and the inner gear cover is rotated to drive the gear ring to drive the push rod to move in the arc groove in the drill jig body, so that the diameter of the drill jig body is adjusted. The variable-diameter base body is adopted, the diameter of the drill jig tool base is adjusted through the structure that the inner gear and the outer gear are meshed, the knurled screws are used for locking, operation is easy, efficiency is high, and the drill jig tool has the advantages of being easy to operate, high in efficiency and capable of adapting to workpieces with different diameters.

Description

Technical Field

[0001] The utility model belongs to the field of large shaft parts, in particular to a drilling jig with variable diameter. Background Art

[0002] The machining of stepped holes is a common and critical task in the broad fields of mechanical processing and equipment maintenance. Due to their unique structural characteristics—namely, the presence of sections of varying diameters within the same hole—stepped holes are widely used in various mechanical parts to achieve specific assembly or functional requirements. However, existing techniques for machining such stepped holes primarily rely on drilling jigs with fixed dimensions.

[0003] Due to the structural limitations of these traditional drilling jigs, whenever stepped holes of varying diameters need to be machined, a significant amount of time and labor is required to replace the jig to match the hole diameter. This process is not only cumbersome and labor-intensive, but also significantly reduces production efficiency, a problem particularly acute in mass production and high-variety, small-batch production environments.

[0004] In addition, frequent replacement of drilling jigs may also cause a series of problems, such as reduced processing accuracy and increased scrap rate due to errors in the replacement process; and the loss or damage of drilling jigs due to poor management, further increasing the cost burden.

[0005] Therefore, to address the aforementioned issues in existing technologies, a new drilling jig design solution is urgently needed: a variable-diameter drilling jig. This jig should be able to flexibly adjust the drill diameter according to processing requirements, thereby enabling efficient and precise machining of stepped holes of varying diameters. This would significantly improve production efficiency and quality in the machining and maintenance industries, while reducing operational difficulty and costs. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a drill jig with variable diameter, which enables the drill jig device to process step holes of different diameters without changing the drill jig, thereby improving the processing efficiency of the step holes.

[0007] The technical solutions of this utility model are as follows:

[0008] A variable diameter drilling jig tool is characterized by comprising:

[0009] The main body of the drilling jig has an adjustable diameter, and arc grooves are evenly distributed on the circumference of the main body of the drilling jig for the insertion of each push rod;

[0010] A replaceable inner diameter bushing is provided inside the jig body to accommodate workpieces of different diameters;

[0011] A locking structure, comprising a top cover plate and a knurled adjustment screw, wherein the top cover plate is connected to the jig body via a top connecting screw, and the knurled adjustment screw is used to adjust and lock the position of the push rod to ensure that the jig tooling is fixed to the part;

[0012] The internal and external gear meshing mechanism includes an internal gear cover and a gear ring, wherein the gear ring meshes with the internal gear cover. By rotating the internal gear cover, the gear ring drives the push rod to move in the arc groove on the jig body, thereby adjusting the diameter of the jig body;

[0013] The connecting pin is used to connect the groove plate and the gear ring to facilitate the disassembly and replacement of parts.

[0014] Preferably, the number of the push rods is 8, which are evenly distributed around the drilling template body.

[0015] Preferably, the outer ring of the inner gear cover is provided with vertical knurling to increase friction and facilitate manual rotation adjustment.

[0016] Preferably, the drilling jig tooling further includes a bottom cover plate and a bottom cover plate locking screw, which are used to close the bottom of the drilling jig body and increase the stability of the overall structure.

[0017] Preferably, the jig tooling adjusts the position of the inner gear cover to move the push rod in the arc groove, thereby achieving continuous adjustment of the diameter of the jig body to accommodate workpieces of different diameters.

[0018] Preferably, the external gear of the inner gear ring meshes with the internal gear teeth of the inner gear cover, and the other side of the inner gear cover is connected to the top cover plate, and the top cover plate is provided with a knurled adjustment screw that can adjust the push rod.

[0019] Preferably, one end of the push rod is connected to the arc groove inside the groove plate, and the other end is provided with a push rod block that can fit the workpiece, and the tip of the push rod block is arc-shaped.

[0020] The utility model also provides a method for using the above-mentioned variable-diameter drilling jig, which is characterized in that it includes the steps of:

[0021] Step S1. Select a suitable inner diameter bushing and install it in the jig body;

[0022] Step S2. Loosen the knurled adjustment screw;

[0023] Step S3. Hold the top cover in place, rotate the internal gear cover to retract the push rod into the internal gear hole, place the jig into the part hole, and rotate the internal gear cover again to extend the push rod within the arc groove, ensuring that the jig is securely fixed to the part.

[0024] Step S4. Tighten the knurled adjustment screw to prevent the push rod from moving;

[0025] Step S5: Move the main spindle of the drilling machine so that the drill bit passes through the inner diameter bushing to perform drilling.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1) The push rod position can be easily adjusted by manually rotating the inner and outer ring gears to ensure a close fit on workpieces of varying diameters. The locking device then secures the position to ensure stability during machining. To achieve a superior fit on the jig body, multiple push rods are incorporated, each with a circular arc tip design. This improves fit with the workpiece and, in turn, enhances coaxiality during step hole machining.

[0028] 2) The meshing design of the internal and external gears drives the push rod block to move smoothly within the arc groove, achieving smooth and precise adjustment. Furthermore, the vertical knurling design on the external gear cover not only facilitates rotational force generation but also enhances the operating experience.

[0029] 3) The use of connecting pins to connect the groove plate and the inner gear ring not only simplifies the production process of parts, but also greatly facilitates subsequent replacement and maintenance.

[0030] 4) The replaceable inner diameter bushing further enhances the adaptability of the tooling, allowing the tooling to easily handle more workpieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front structural diagram of the variable diameter drilling jig tooling of the utility model;

[0032] Figure 2 This is a schematic diagram of the reverse structure of the variable diameter drilling jig tooling of the utility model;

[0033] Figure 3 This is an exploded view of the variable diameter drilling jig tooling of the utility model;

[0034] Figure 4 This is a diagram showing the maximum diameter state of the variable diameter drilling jig tooling of the present utility model;

[0035] Figure 5 This is a diagram of the minimum diameter state of the variable diameter drilling jig tooling of the utility model. DETAILED DESCRIPTION

[0036] To make the utility model more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figures 1 to 5As shown, a variable diameter drilling jig includes a jig body 101. One side of the jig body 101 is movably connected to a replaceable inner diameter bushing 104 via a push rod 103. The other side of the jig body 101 is provided with an inner ring gear 102, which is connected to a groove plate 107 via a connecting pin 108. The external gear of the inner ring gear 102 meshes with the internal gear teeth of an inner gear cover 109. The other side of the inner gear cover 109 is connected to a top cover plate 110, which is equipped with a knurled adjustment screw 112 that can limit the push rod block 3. The jig body 101 is provided with multiple bases on one side that cooperate with the push rods 103 to enable variable diameter. The other side of the jig body 101 is connected to the top cover plate 110 via a top connecting screw 111. One end of the push rod 103 is connected to a circular arc groove within the groove plate 107, and the other end is provided with a push rod block that can fit the workpiece. The push rod block has an arc-shaped tip. The inner gear cover 109 is meshed with the inner gear ring 102 and has a vertical knurling pattern on the outer surface to increase friction. The knurling adjustment screw 112 is provided on the top cover 110 and can limit the push rod 103.

[0039] The method of using the drilling jig device includes the following steps:

[0040] Step S1: Select a suitable inner diameter bushing for assembly;

[0041] Step S2: Loosen the knurled adjusting screw 112.

[0042] Step S3: restrain the top cover plate 110 and adjust the inner gear cover 109 so that the push rod 103 moves in the arc groove of the jig body 101, so that the jig body 101 is in a minimum diameter state, and then place the jig device into the part hole;

[0043] Step S4: restrain the top cover 10 and adjust the inner gear cover 9 so that the push rod 3 extends out under the limit of the arc groove, so that the jig device is fixed on the part;

[0044] Step S5: Tighten the knurled adjustment screw 112 to prevent the push rod 103 from moving.

[0045] Step S6: Move the drill press spindle so that the drill bit passes through the inner diameter bushing.

[0046] Step S7: Rotate the spindle for processing to quickly locate the center of the stepped hole and reduce the shaking of the drill bit.

[0047] like Figure 1As shown, the jig assembly is designed with a locking structure. The top cover plate 110 is in rigid contact with the jig body 101 via top connecting screws 111, and the preload is directly adjusted via knurled adjustment screws 112. The outer ring of the gear cover 109 within the jig assembly uses vertical knurling to increase friction and facilitate manual adjustment of operating conditions.

[0048] like Figure 2 and Figure 3 As shown, the jig device adopts 8 push rods 103, the tips of the push rods 103 are arc-shaped, which improves the fit. The jig device adopts replaceable bushings 104, which increases the scope of use.

[0049] like Figure 4 As shown, the jig device adjusts the internal gear cover 109 and the push rod 103 is limited by the groove plate 107 and the jig body 101 to achieve the maximum diameter working state;

[0050] like Figure 5 As shown, the jig tool adjusts the internal gear cover 109 and the push rod 103 is limited by the groove plate 107 and the jig body 101, and the minimum diameter working state can be achieved.

Claims

1. A drill jig with variable diameter, characterized in that: include: The jig body (101) has an adjustable diameter, and arc grooves are evenly distributed on the circumference of the jig body for the insertion of the push rods (103); A replaceable inner diameter bushing (104) is disposed inside the jig body and is used to adapt to workpieces of different diameters; A locking structure comprising a top cover plate (110) and a knurled adjustment screw (112), wherein the top cover plate (110) is connected to the jig body via a top connecting screw (111), and the knurled adjustment screw is used to adjust and lock the position of the push rod to ensure that the jig tooling is fixed on the part; The internal and external gear meshing mechanism comprises an internal gear cover (109) and a gear ring (102), wherein the gear ring is meshed with the internal gear cover, and the internal gear cover (109) is rotated to drive the gear ring (102) to drive the push rod (103) to move in the arc groove on the jig body, thereby adjusting the diameter of the jig body; The connecting pin (108) is used to connect the groove plate (107) and the gear ring (102) to facilitate the disassembly and replacement of parts.

2. The variable diameter drilling jig according to claim 1, characterized in that: There are 8 push rods, which are evenly distributed around the drilling template body.

3. The variable diameter drilling jig according to claim 1, characterized in that: The outer ring of the inner gear cover is provided with vertical knurling to increase friction and facilitate manual rotation adjustment.

4. The variable diameter drilling jig according to claim 1, characterized in that: The drilling jig tooling also includes a bottom cover plate and a bottom cover plate locking screw, which are used to close the bottom of the drilling jig body and increase the stability of the overall structure.

5. The variable diameter drilling jig according to claim 1, characterized in that: The drilling jig tooling adjusts the position of the inner gear cover to enable the push rod to move in the arc groove, thereby achieving continuous adjustment of the diameter of the drilling jig body to adapt to workpieces of different diameters.

6. The variable diameter drilling jig according to claim 1, characterized in that: The outer gear of the gear ring (102) meshes with the inner gear teeth of the internal gear cover (109), and the other side of the internal gear cover (109) is connected to the top cover (110). The top cover (110) is provided with a knurled adjustment screw (112) that can adjust the push rod (103).

7. The variable diameter drilling jig according to claim 1, characterized in that: One end of the push rod (103) is connected to the arc groove inside the groove plate (107), and the other end is provided with a push rod block that can fit the workpiece, and the tip of the push rod block is arc-shaped.

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