CN219853411U - Drilling fixture - Google Patents

Abstract

The utility model discloses a drilling fixture, which is characterized in that: comprises a bottom plate, a positioning column and a pressing mechanism; the positioning column is fixed on the bottom plate, a workpiece placing groove is formed in the middle of the positioning column, and the workpiece placing groove is U-shaped in overlook projection; three drill bit avoidance grooves are formed in the outer side wall of the positioning column; the middle part of the inner wall of the workpiece placing groove is provided with a U-shaped convex shoulder, a gear positioning groove is arranged in the U-shaped convex shoulder, and convex teeth are arranged on the arc section of the inner wall of the gear positioning groove; the pressing mechanism comprises a pressing cylinder and a pressing plate, the output end of the pressing cylinder is connected with the pressing plate, the pressing plate is located above one of the drill bit avoidance grooves, and a drill bit avoidance opening is formed in the pressing plate. The utility model can be used for positioning and clamping during drilling of the gear shaft, has ingenious structure, is convenient to assemble and disassemble, can automatically discharge scraps, can improve the alignment accuracy, greatly shortens the processing time and improves the production efficiency.

Description

Drilling fixture

Technical Field

The utility model relates to a drilling fixture.

Background

Referring to fig. 1, a gear shaft is shown in comparison with the gear shaft before and after drilling the connecting holes. The gear shaft (N) is provided with a shaft body (N-1), a gear (N-2) and a flange plate (N-3) are arranged on the shaft body (N-1), three connecting lugs (N-4) are arranged on the flange plate (N-3), and connecting holes (N-41) are drilled on the connecting lugs (N-4). Because the gear shaft belongs to a non-standard part (new product), and the prior known and conventional clamp has the problem of being unable to be used commonly (the applicant does not find a disclosed clamp related to the drilling and processing of the connecting hole of the gear shaft), a special clamp capable of positioning and pressing during the drilling and processing of the connecting hole of the gear shaft needs to be developed and designed.

Disclosure of Invention

The utility model provides a drilling fixture, which solves the technical problem that the existing known fixture cannot be used for positioning and clamping the gear shaft during drilling of a connecting hole of the gear shaft.

In order to achieve the above purpose, the scheme of the utility model is as follows: a boring grab, its characterized in that: comprises a bottom plate, a positioning column and a pressing mechanism; the positioning column is fixed on the bottom plate, a workpiece placing groove is formed in the middle of the positioning column, and the workpiece placing groove is U-shaped in overlook projection; three drill bit avoidance grooves are formed in the outer side wall of the positioning column; the middle part of the inner wall of the workpiece placing groove is provided with a U-shaped convex shoulder, a gear positioning groove is arranged in the U-shaped convex shoulder, and convex teeth are arranged on the arc section of the inner wall of the gear positioning groove; the pressing mechanism comprises a pressing cylinder and a pressing plate, the output end of the pressing cylinder is connected with the pressing plate, the pressing plate is located above one of the drill bit avoidance grooves, and a drill bit avoidance opening is formed in the pressing plate.

Preferably, the teeth have at least two.

Further, the bottom plate is provided with a mounting hole.

The pressing mechanism further comprises a guide rod, the guide rod is fixedly connected with the bottom plate, and a guide hole for the guide rod to be in sliding fit is formed in the pressing plate.

Preferably, the pressure cylinder adopts a telescopic cylinder or a telescopic hydraulic cylinder.

The utility model has the beneficial effects that:

the positioning and clamping device can be specially used for positioning and clamping the gear shaft during drilling the connecting hole, can simultaneously concentrically position and prevent the gear shaft from rotating during drilling, and can ensure the hole position precision after the machining;

secondly, the utility model can realize rapid automatic compaction or rapid loosening through the compaction mechanism so as to limit the gear shaft to move up and down and rotate in the workpiece placing groove, thereby ensuring that the gear shaft is stable and reliable during drilling and does not jump up and down and loose during rotation;

thirdly, the utility model only needs to insert the gear shaft into place from the side opening of the workpiece placing groove by manpower during clamping, the operation is very convenient, the difficulty is low, scraps can be automatically discharged from the drill bit avoiding groove, the rapid clamping and dismounting of the workpiece can be realized, and the clamping efficiency can be greatly improved;

fourth, the utility model can cooperate with the multi-axis drill (or called multi-head drill, multi-axis device) to finish the drilling processing of the connecting holes on the three connecting lugs at the same time, which can ensure the relative position precision between the three connecting holes and improve the processing efficiency at the same time.

Drawings

Fig. 1 is a diagram showing a gear shaft before and after drilling a connection hole.

Fig. 2 is a front view of a boring grab in accordance with an embodiment of the present utility model.

Fig. 3 is a top view of a boring grab in accordance with an embodiment of the present utility model.

Fig. 4-5 are perspective views of a boring grab in accordance with an embodiment of the present utility model.

Fig. 6 is a reference view (which corresponds to fig. 4, and is substantially the same) of a work site of a boring grab according to an embodiment of the present utility model.

Fig. 7 is a front view of a drilling jig with a gear shaft clamped thereon according to an embodiment of the present utility model.

Fig. 8 is a top view of a drilling jig with a gear shaft clamped thereon according to an embodiment of the present utility model.

Fig. 9 is a perspective view of a drilling jig with a gear shaft clamped thereon according to an embodiment of the present utility model.

Fig. 10 is a reference view (which corresponds to fig. 9 and is substantially the same) of a work site when a gear shaft is clamped to a boring grab according to an embodiment of the present utility model.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

examples: referring to fig. 2-6, a boring grab includes a base plate 1, a locating column 2, and a hold-down mechanism 3.

The drilling fixture is specially used for positioning and clamping the gear shaft N during machining of the connecting hole N-41. The gear shaft N is provided with a shaft body N-1, a gear N-2 and a flange N-3 are arranged on the shaft body N-1, three connecting lugs N-4 are arranged on the flange N-3, and a connecting hole N-41 is drilled on each connecting lug N-4.

Wherein, the reference column 2 is fixed on the bottom plate 1. Specifically, the lower end of the positioning column 2 is fixedly connected with the upper surface of the bottom plate 1.

The middle part of the positioning column 2 is provided with a workpiece placing groove 2-1, and the workpiece placing groove 2-1 is U-shaped in overlook projection. Specifically, the width of the notch of the workpiece placing groove 2-1 is smaller than the outer diameter of the flange N-3. During clamping, the gear shaft N is vertically arranged in the workpiece placing groove 2-1, and the flange N-3 of the gear shaft N is horizontally supported by the top surface of the positioning column 2.

In this embodiment, in order to facilitate the picking, placing and clamping of the workpiece, the side opening of the workpiece placement groove 2-1 faces forward.

Wherein, three drill bit avoidance grooves 2-2 are uniformly formed on the outer side wall of the positioning column 2 along the circumferential direction. Specifically, the three drill bit avoidance grooves 2-2 are in one-to-one correspondence with the three connecting lugs N-4 on the flange N-3.

The middle part of the inner wall of the workpiece placing groove 2-1 is provided with a U-shaped shoulder 2-3, the U-shaped shoulder 2-3 is internally provided with a gear positioning groove 2-31, the gear positioning groove 2-31 is in a U shape in a depression mode, and the middle part of the inner wall of the gear positioning groove 2-31 is provided with a circular arc section 2-32. The gear positioning groove 2-31 is provided with convex teeth 2-33 on the arc section 2-32 on the inner wall.

Preferably, said teeth 2-33 have at least two. Whereas in the present embodiment the teeth 2-33 have three.

Specifically, the width of the notch of the gear positioning groove 2-31 is matched with the outer diameter of the addendum circle of the gear N-2. During clamping, the gear N-2 can be just inserted into the circular arc section 2-32 of the inner wall of the gear positioning groove 2-31 to be concentrically matched and positioned, meanwhile, the convex teeth 2-3 are 3 inserted into tooth grooves of the gear N-2, circumferential positioning and rotation prevention can be realized, and three connecting lugs N-4 of the flange N-3 are respectively positioned right above the three drill bit avoidance grooves 2-2 and correspond to three drill shaft positions on a multi-shaft drill (or multi-head drill or multi-shaft device one by one). (see FIGS. 6 and 10)

The pressing mechanism 3 comprises a pressing cylinder 3-1, a pressing plate 3-2 and a guide rod 3-3, wherein the output end of the pressing cylinder 3-1 is connected with the pressing plate 3-2, the pressing plate 3-2 is located above one of the drill bit avoidance grooves 2-2, a drill bit avoidance opening 3-21 is formed in the front end of the pressing plate 3-2, the guide rod 3-3 is fixedly connected with the bottom plate 1, and a guide hole 3-22 used for slidably matching with the guide rod 3-3 is formed in the rear portion of the pressing plate 3-2. The pressing cylinder 3-1 is vertically and fixedly arranged on the bottom plate 1, and the output end of the pressing cylinder 3-1 faces upwards and is fixedly connected with the middle part of the pressing plate 3-2. During clamping, the pressing cylinder 3-1 drives the pressing plate 3-2 to move downwards, the front part of the pressing plate 3-2 moves downwards to press the rear part of the flange plate N-3 on the gear shaft N and one connecting lug N-4 positioned at the rear side, and at the moment, the gear shaft N cannot loosen. The front end of the pressing plate 3-2 is provided with a drill bit avoidance port 3-21, so that drill bit processing on the pressed connecting lug N-4 is not affected, and a cutter cannot be touched.

The pressing plate 3-2 is guided to move up and down along the guide rod 3-3 when being driven by the pressing cylinder 3-1, so that the pressing plate 3-2 can be ensured to keep stable direction when being pressed, cannot rotate, and is more stable and reliable after being pressed; meanwhile, the pressure cylinder 3-1 is protected from being subjected to steering force during telescopic operation, guiding is stable, precise movement is kept, and the service life is prolonged.

Further, the base plate 1 is provided with a mounting hole 1-1. The mounting hole 1-1 of the base plate 1 is detachably fixed to a table on a multi-axis drill (or called multi-head drill, multi-axis machine) by bolts.

Preferably, the cylinder 3-1 is a telescopic cylinder or a telescopic hydraulic cylinder.

The operation steps of the drilling fixture when in use are as follows (see fig. 7-10):

firstly, inserting a gear shaft N from a side opening of a workpiece placing groove 2-1, inserting a gear N-2 of the gear shaft N into an arc section 2-32 on the inner wall of a gear positioning groove 2-31 and bottom to realize concentric positioning, and simultaneously, matching a tooth groove of the gear N-2 with a convex tooth 2-33 to realize anti-rotation direction positioning; the flange plate N-3 of the gear shaft N automatically descends under the action of self gravity and is horizontally supported by the top surface of the positioning column 2, at this time, three connecting lugs N-4 on the flange plate N-3 are respectively positioned right above the three drill bit avoidance grooves 2-2 and are in one-to-one correspondence with three drill shaft positions on a multi-shaft drill (or called multi-head drill or multi-shaft device) (fig. 9-10);

secondly, starting a pressing cylinder 3-1 to work and driving a pressing plate 3-2 to move downwards, wherein the pressing plate 3-2 downwards presses one connecting lug N-4 at a part of a flange plate N-3 on a gear shaft N and a corresponding position, and at the moment, the gear shaft N is positioned and pressed so as to ensure that the gear shaft N cannot loosen during subsequent drilling;

thirdly, starting a multi-shaft drill (or called multi-head drill or multi-shaft device) to work and simultaneously finishing the drilling of the connecting holes N-41 on the three connecting lugs N-4;

and fourthly, starting the pressing cylinder 3-1 to work and driving the pressing plate 3-2 to move upwards, loosening the gear shaft N after the pressing plate 3-2 moves upwards, then pulling out the machined gear shaft N from the side opening of the workpiece placing groove 2-1, and then clamping the next gear shaft N again.

The drilling fixture has the following characteristics and is analyzed as follows:

the utility model can be specially used for positioning and clamping the gear shaft N during drilling the connecting hole, can simultaneously concentrically position and prevent the gear shaft N from rotating during drilling, and can ensure the hole position precision of the connecting hole after the machining;

secondly, the utility model can realize rapid automatic compaction or rapid loosening through the compaction mechanism 3 so as to limit the gear shaft to move up and down and rotate in the workpiece placing groove 2-1, thereby ensuring that the gear shaft is stable and reliable during drilling and does not jump up and down and loose during rotation;

thirdly, the gear shaft N is only required to be inserted into place from the side opening of the workpiece placing groove N-1 manually during clamping, so that the operation is very convenient, the difficulty is low, scraps can be automatically discharged from the drill bit placing groove, the rapid clamping and dismounting of workpieces can be realized, and the clamping efficiency can be greatly improved;

fourth, the utility model can cooperate with the multi-axis drill (or called multi-head drill, multi-axis device) to finish the drilling processing of the connecting holes N-41 on the three connecting lugs at the same time, which can ensure the relative position precision between the three connecting holes N-41 and improve the processing efficiency at the same time.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (5)

1. A boring grab, its characterized in that: comprises a bottom plate (1), a positioning column (2) and a pressing mechanism (3);

the positioning column (2) is fixed on the bottom plate (1), a workpiece placing groove (2-1) is formed in the middle of the positioning column (2), and the workpiece placing groove (2-1) is U-shaped in overlook projection;

three drill bit avoidance grooves (2-2) are formed in the outer side wall of the positioning column (2);

a U-shaped convex shoulder (2-3) is arranged in the middle of the inner wall of the workpiece placing groove (2-1), a gear positioning groove (2-31) is formed in the U-shaped convex shoulder (2-3), and convex teeth (2-33) are arranged on an arc section (2-32) of the inner wall of the gear positioning groove (2-31);

the pressing mechanism (3) comprises a pressing cylinder (3-1) and a pressing plate (3-2), wherein the output end of the pressing cylinder (3-1) is connected with the pressing plate (3-2), the pressing plate (3-2) is located above one of the drill bit avoidance grooves (2-2), and a drill bit avoidance opening (3-21) is formed in the pressing plate (3-2).

2. A boring grab as claimed in claim 1, wherein: the teeth (2-33) have at least two.

3. A boring grab as claimed in claim 1, wherein: the base plate (1) is provided with mounting holes (1-1).

4. A boring grab as claimed in claim 1, wherein: the pressing mechanism (3) further comprises a guide rod (3-3), the guide rod (3-3) is fixedly connected with the bottom plate (1), and a guide hole (3-22) for slidably matching the guide rod (3-3) is formed in the pressing plate (3-2).

5. A boring grab as claimed in claim 1, wherein: the pressure cylinder (3-1) adopts a telescopic cylinder or a telescopic hydraulic cylinder.