Auxiliary drilling device for part with inner cavity

Abstract

The utility model discloses an auxiliary drilling device for a part with an inner cavity, which relates to the technical field of drilling and comprises a cantilever, a first hollow shaft and a second hollow shaft are rotatably mounted in the left end and the right end of the cantilever respectively, and a driving belt pulley positioned above the cantilever is fixedly arranged outside the first hollow shaft. A driven belt wheel is fixedly arranged outside the second hollow shaft, a belt is installed between the driven belt wheel and the driving belt wheel, a cutter handle is fixedly arranged in a lower end opening of the second hollow shaft, and a drill bit is fixedly arranged in the cutter handle in the vertical direction; the upper end of the first hollow shaft is provided with a clamping assembly used for clamping a main shaft of the vertical drilling machine, the clamping assembly comprises two L-shaped plates welded to the left outer cylindrical face and the right outer cylindrical face of the first hollow shaft respectively, clamping blocks located above the first hollow shaft are welded to the inner side ends of the two guide rods, and the two guide rods are sleeved with springs. The blind hole drilling device has the advantage that the blind hole can be drilled in the bottom wall of the inner cavity of the part with the inner cavity through the vertical drilling machine.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling, in particular to an auxiliary drilling device for parts with inner cavities. BACKGROUND

[0002] A vertical drilling machine used in a workshop comprises a drilling machine body, a main shaft rotatably installed in the drilling machine body, a tool shank connected to the bottom end of the main shaft, a drill vertically installed in the tool shank, a driving motor installed at the top of the drilling machine body, an output shaft of the driving motor connected to the top end of the main shaft, and a handle provided on the side surface of the drilling machine body. The method for drilling a hole in a workpiece by using the vertical drilling machine is as follows: the driving motor is turned on to drive the main shaft to rotate, the main shaft drives the tool shank to rotate, and the tool shank drives the drill to rotate synchronously; then, the worker presses the handle downward, the main shaft moves linearly downward to the left, the main shaft drives the tool shank to move downward, the tool shank drives the drill to move toward the workpiece, and the drill in the rotating state drills a through hole in the workpiece.

[0003] The structure of a part with an inner cavity 1 initially produced in a workshop is shown in Figure 1 The left end surface of the part with the inner cavity 1 is provided with an inner cavity 2, which is concave, and the height of the inner cavity 2 is 28 cm. After a batch of the parts with the inner cavity 1 are initially produced, a blind hole 3 is required to be drilled in the bottom wall of the inner cavity 2 to meet the needs of customers, as shown in Figure 2 which is a structural schematic view of the part with the inner cavity 1 with the blind hole 3.

[0004] Since the height of the inner cavity 2 of the part with the inner cavity 1 is small, and the material of the top wall of the inner cavity 2 of the part with the inner cavity 1 hinders the movement of the drill in the height direction, the drill of the vertical drilling machine cannot drill the blind hole 3 in the bottom wall of the inner cavity 2, so that the worker cannot use the vertical drilling machine in the workshop to drill the blind hole 3 in the bottom wall of the inner cavity 2 of the part with the inner cavity, and the needs of the customers cannot be met.

[0005] Therefore, an auxiliary drilling device is needed, which can use the vertical drilling machine to drill a blind hole in the bottom wall of the inner cavity of a part with an inner cavity. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims to overcome the shortcomings of the prior art and provide an auxiliary drilling device for parts with inner cavities, which can use a vertical drilling machine to drill a blind hole in the bottom wall of the inner cavity of a part with an inner cavity.

[0007] The utility model discloses a kind of auxiliary drilling devices of inner cavity parts, it includes cantilever, first hollow shaft and second hollow shaft are respectively rotationally installed in the left and right end portions of the cantilever, the outer portion of first hollow shaft is fixed with the driving pulley located above cantilever, the outer portion of second hollow shaft is fixed with driven pulley, belt is installed between driven pulley and driving pulley, the lower end of second hollow shaft is fixed with tool shank in port, tool shank is fixed with the drill bit vertically arranged in it;

[0008] The upper end of the first hollow shaft is provided with a clamping assembly for clamping the spindle of the vertical drilling machine. The clamping assembly includes two L-plates welded to the left and right outer cylindrical surfaces of the first hollow shaft. A guide rod is slidably inserted into each of the two L-plates. A clamping block is welded to the inner side of each of the two guide rods above the first hollow shaft. An arc-shaped groove is formed on the inner end surface of each clamping block. The arc-shaped grooves of the two clamping blocks are oppositely arranged. A spring is sleeved on each of the two guide rods, with one end of the spring fixed to the outer end surface of the clamping block and the other end fixed to the L-plate. Screws are threadedly connected to the two L-plates, with the ends of the screws abutting against the outer end surfaces of the clamping blocks.

[0009] The left and right end portions of the cantilever are each provided with a bearing hole. A ball bearing is fixedly arranged in each of the two bearing holes. The first hollow shaft is fixedly arranged in the inner ring of the ball bearing on the left side, and the second hollow shaft is fixedly arranged in the inner ring of the ball bearing on the right side.

[0010] The two clamping blocks are symmetrically arranged on the left and right sides.

[0011] A guide hole is formed in the L-plate, and the guide rod is in sliding cooperation with the guide hole.

[0012] A threaded hole is formed in the L-plate, and the screw is in threaded cooperation with the threaded hole.

[0013] The inner diameter of the first hollow shaft is equal to the diameter of the spindle of the vertical drilling machine.

[0014] The utility model has the following advantages: the vertical drilling machine can be used to drill a blind hole on the bottom wall of the inner cavity of the inner cavity part. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural diagram of an inner cavity part with an inner cavity.

[0016] Figure 2 It is a structural diagram of an inner cavity part with an inner cavity and a blind hole.

[0017] Figure 3 It is a structural diagram of the utility model.

[0018] Figure 4 It is a main sectional view of the utility model. Figure 3 ​

[0019] Figure 5 for Figure 4 Schematic diagram of AA section;

[0020] Figure 6 This is an isometric view of the clamping block;

[0021] Figure 7 for Figure 6 Main section diagram;

[0022] Figure 8 A schematic diagram showing the inner cavity of the first hollow shaft being fitted onto the spindle of a vertical drilling machine from bottom to top;

[0023] Figure 9 This is a schematic diagram showing how the present invention is fixed to the spindle of a vertical drilling machine;

[0024] Figure 10 This is a schematic diagram showing the drill bit positioned directly above the bottom wall of the inner cavity;

[0025] Figure 11 A schematic diagram showing a drill bit drilling a blind hole in the bottom wall of the cavity of a part with an internal cavity;

[0026] In the picture:

[0027] 1-Part with an inner cavity, 2-Inner cavity, 3-Blind hole;

[0028] 4-Cantilever, 5-First hollow shaft, 6-Second hollow shaft, 7-Driving pulley, 8-Driven pulley, 9-Belt, 10-Tool holder, 11-Drill bit;

[0029] 12-Clamping assembly, 13-L-plate, 14-Guide rod, 15-Clamping block, 16-Arc groove, 17-Spring, 18-Screw, 19-Ball bearing, 20-Threaded hole, 21-Spindle. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0031] like Figures 3-7As shown in the figure, an auxiliary drilling device of a hollow part includes a cantilever 4, a first hollow shaft 5 and a second hollow shaft 6 are respectively rotatably installed in the left and right end portions of the cantilever 4, an outer portion of the first hollow shaft 5 is fixedly provided with a driving pulley 7 located above the cantilever 4, an outer portion of the second hollow shaft 6 is fixedly provided with a driven pulley 8, a belt 9 is installed between the driving pulley 7 and the driven pulley 8, a lower end portion of the second hollow shaft 6 is fixedly provided with a tool shank 10, and the tool shank 10 is fixedly provided with a drill bit 11 vertically arranged; an inner cavity diameter of the first hollow shaft 5 is equal to a diameter of a main shaft of a vertical drilling machine.

[0032] An upper end portion of the first hollow shaft 5 is provided with a clamping assembly 12 for clamping the main shaft of the vertical drilling machine, the clamping assembly 12 includes two L-shaped plates 13 respectively welded to left and right outer cylindrical surfaces of the first hollow shaft 5, two guide rods 14 are slidably penetrated into the two L-shaped plates 13, two clamping blocks 15 are welded to inner side end portions of the two guide rods 14 and located above the first hollow shaft 5, the two clamping blocks 15 are symmetrically arranged, an arc-shaped groove 16 is formed in an inner end surface of the clamping block 15, the arc-shaped grooves 16 of the two clamping blocks 15 are oppositely arranged, a spring 17 is sleeved on each of the two guide rods 14, one end of the spring 17 is fixedly arranged on an outer end surface of the clamping block 15, and the other end of the spring 17 is fixedly arranged on the L-shaped plate 13; two screws 18 are threadedly connected in the two L-shaped plates 13, and end heads of the screws 18 abut against the outer end surface of the clamping block 15.

[0033] A guide hole is formed in the L-shaped plate 13, and the guide rod 14 is in sliding fit with the guide hole.

[0034] The working process of the utility model is as follows:

[0035] S1, the auxiliary drilling device is fixed on the main shaft of the vertical drilling machine: the worker sets the inner cavity of the first hollow shaft 5 of the auxiliary drilling device on the main shaft 21 of the vertical drilling machine from bottom to top, as shown in the figure, Figure 8 The worker twists the two screws 18, the end heads of the screws 18 push the clamping blocks 15 to move towards the main shaft 21, the arc-shaped grooves 16 of the two clamping blocks 15 simultaneously move towards the main shaft 21, the clamping blocks 15 drive the guide rods 14 to synchronously move, and the clamping blocks 15 stretch the springs 17 at the same time; when the worker can no longer twist the screws 18, the main shaft 21 is just fixed between the two clamping blocks 15 by clamping, so that the auxiliary drilling device is finally fixed on the main shaft 21 of the vertical drilling machine, as shown in the figure, Figure 9

[0036] ​S2, drill a blind hole 3 on the bottom wall of the inner cavity 2 of the inner cavity part 1, the specific operation steps are as follows:

[0037] S21, the worker takes out an inner cavity part 1 to be drilled, and pushes the inner cavity part 1 to the left so that the inner cavity 2 of the inner cavity part 1 is outside the second hollow shaft 6 and the drill bit 11, to complete the installation of the inner cavity part 1, at this time, the drill bit 11 is just above the bottom wall of the inner cavity 2, as shown in Figure 10 ;

[0038] S22, the worker holds the cantilever 4 with his hand; then the worker starts the driving motor of the vertical drilling machine, the driving motor drives the main shaft 21 to rotate, the main shaft 21 drives the first hollow shaft 5 to rotate, the first hollow shaft 5 drives the clamping assembly 12 and the driving pulley 7 to rotate synchronously, the driving pulley 7 drives the driven pulley 8 to rotate synchronously through the belt 9, the driven pulley 8 drives the second hollow shaft 6 to rotate, the second hollow shaft 6 drives the tool holder 10 to rotate, and the tool holder 10 drives the drill bit 11 to rotate synchronously;

[0039] S23, the worker presses the handle of the vertical drilling machine downward, at this time, the main shaft 21 of the vertical drilling machine moves downward, and the main shaft 21 drives the clamping assembly 12, the first hollow shaft 5, the cantilever 4, the second hollow shaft 6 and the drill bit 11 to move downward synchronously, the drill bit 11 in the rotating state drills a blind hole 3 on the bottom wall of the inner cavity 2 of the inner cavity part 1, as shown in Figure 11 ;

[0040] S3, after drilling, the worker turns off the driving motor, and then lifts the handle of the vertical drilling machine upward, at this time, the main shaft 21 of the vertical drilling machine moves upward, and the main shaft 21 drives the clamping assembly 12, the first hollow shaft 5, the cantilever 4, the second hollow shaft 6 and the drill bit 11 to move upward synchronously, and the drill bit 11 is out of the blind hole 3; then the worker moves the inner cavity part 1 to the right to complete the processing of one inner cavity part 1;

[0041] S4, the worker repeats the steps S2~S3, that is, the worker can continuously drill blind holes 3 on the bottom walls of the inner cavities 2 of multiple inner cavity parts 1.

[0042] As can be seen from steps S1~S3, the worker only needs to fix the auxiliary drilling device on the main shaft 21 of the vertical drilling machine through the clamping assembly 12; then starts the driving motor of the vertical drilling machine to make the drill bit 11 rotate; then the worker presses the handle of the vertical drilling machine downward to make the drill bit 11 drill downward toward the bottom wall of the inner cavity 2 of the inner cavity part 1, thereby finally realizing the drilling of the blind hole 3 on the bottom wall of the inner cavity 2 of the inner cavity part 1. Therefore, the auxiliary drilling device can cooperate with the vertical drilling machine to drill the blind hole 3 on the bottom wall of the inner cavity 2 of the inner cavity part 1, thereby being able to supply the customer with parts with blind holes 3, and further meeting the needs of the customer.

[0043] It should be pointed out finally that: the above only for the preferred embodiments of the utility model have, and do not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An auxiliary drilling device for a part with a lumen, characterized in that: It includes cantilever (4), the left and right end of cantilever (4) is respectively rotatably installed with first hollow shaft (5) and second hollow shaft (6), the outside of first hollow shaft (5) is fixedly provided with driving pulley (7) located above cantilever (4), the outside of second hollow shaft (6) is fixedly provided with driven pulley (8), belt (9) is installed between driven pulley (8) and driving pulley (7), the lower end of second hollow shaft (6) is fixedly provided with tool holder (10), tool holder (10) is fixedly provided with vertically arranged drill bit (11) in it; The upper end of first hollow shaft (5) is provided with a clamping assembly (12) for clamping the spindle of the vertical drilling machine, the clamping assembly (12) includes two L plates (13) welded on the left and right outer cylindrical surfaces of the first hollow shaft (5), respectively, a guide rod (14) is slidably penetrated into each of the two L plates (13), a clamping block (15) is welded on the inner side end of each of the two guide rods (14) and located above the first hollow shaft (5), an arc-shaped groove (16) is formed in the inner end face of the clamping block (15), the arc-shaped grooves (16) of the two clamping blocks (15) are oppositely arranged, a spring (17) is sleeved on each of the two guide rods (14), one end of the spring (17) is fixedly arranged on the outer end face of the clamping block (15), and the other end is fixedly arranged on the L plate (13); a screw (18) is also threadedly connected in each of the two L plates (13), and the end of the screw (18) abuts against the outer end face of the clamping block (15).

2. An in-line part assisted drilling device according to claim 1, characterized in that: The left and right ends of the cantilever (4) are both provided with bearing holes, and ball bearings (19) are fixedly arranged in the two bearing holes, the first hollow shaft (5) is fixedly arranged in the inner ring of the left ball bearing (19), and the second hollow shaft (6) is fixedly arranged in the inner ring of the right ball bearing (19).

3. An in-line part assisted drilling device according to claim 1, wherein: The two clamping blocks (15) are symmetrically arranged.

4. An in-line part assisted drilling device according to claim 1, wherein: The L plate (13) is provided with a guide hole, and the guide rod (14) is in sliding fit with the guide hole.

5. An in-line part assisted drilling device according to claim 1, characterized in that: The L plate (13) is provided with a threaded hole (20), and the screw (18) is in threaded connection with the threaded hole (20).

6. An in-line part assisted drilling device according to claim 1, characterized in that: The inner diameter of the first hollow shaft (5) is equal to the diameter of the spindle of the vertical drilling machine.

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