Drilling device

Abstract

The invention discloses a drilling device which is used for drilling a cylindrical part and comprises a first mounting cylinder, an electric drill assembly, a connecting piece and a length-adjustable supporting assembly. The electric drill assembly comprises a motor which is installed at one end in the first installation cylinder, a drill bit clamping head is connected to an output shaft, and a drill bit is installed on the drill bit clamping head. The connecting piece is mounted at the other end in the first mounting cylinder; the length-adjustable supporting assembly is connected with the end, away from the first mounting cylinder, of the connecting piece. The acting force applied to the inner wall of the cylindrical part by the length-adjustable supporting assembly is outward in the radial direction, the counter-acting force applied to the length-adjustable supporting assembly by the inner wall of the cylindrical part is inward in the radial direction, and the counter-acting force is transmitted to the drill bit through the length-adjustable supporting assembly and can serve as the feeding force of the drill bit. The drilling device adopting the scheme is used for drilling from the interior of the cylindrical part, the drill bit can be prevented from slipping during drilling, and the drilling device adopting the scheme can be used for drilling on the inner-layer cylindrical wall of the cylindrical part with a double-layer structure.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing equipment, and in particular to a drilling device. Background Art

[0002] Among sleeve parts, annular parts, disc parts, and shaft parts, when the ratio of wall thickness to inner diameter curvature radius is less than 1:20, it is called a thin-walled cylindrical part. Due to its light weight, material saving, compact structure and other characteristics, it is widely used in the aerospace field.

[0003] Since thin-walled cylindrical parts are generally cylindrical, when drilling holes in them, drill displacement or deformation of the cylinder is likely to occur, affecting the hole position accuracy and reducing the product yield. In addition, for cylindrical parts with a double-layer structure, if only the inner layer of the cylinder wall needs to be drilled, the drilling tools in the prior art are usually not usable. Summary of the invention

[0004] The embodiment of the present application provides a drilling device, which can solve the technical problems in the prior art that the drilling accuracy on the cylindrical parts is low and it is impossible to drill holes on the inner wall of the cylindrical parts with a double-layer structure. The technical solution is as follows:

[0005] A drilling device for drilling a cylindrical part comprises: a first mounting tube, an electric drill assembly, a connecting piece, and a length-adjustable support assembly. The electric drill assembly comprises a motor, the motor is mounted at one end in the first mounting tube, and the output shaft of the motor is located outside the first mounting tube, a drill chuck is connected to the output shaft, and a drill bit is mounted on the drill chuck; a connecting piece is mounted at the other end in the first mounting tube; and a length-adjustable support assembly is connected to the end of the connecting piece away from the first mounting tube, and is used to abut against the inner wall of the cylindrical part to be processed to apply a feed force to the drill bit.

[0006] Optionally, the connecting member is a connecting column, and a first screw hole is provided at one end of the connecting column away from the first mounting tube; the length-adjustable support assembly includes a support screw, and the support screw has a radial first through hole, and a handle rod is provided in the first through hole; one end of the support screw is screwed into the first screw hole, and the other end of the support screw is rotatably connected to a first support head.

[0007] Optionally, the connecting member is a connecting column, and a first screw hole is provided at the end of the connecting column facing away from the first mounting tube; the length-adjustable support assembly includes a second mounting tube, a connecting screw and a movable pin; one end of the connecting screw is fixedly connected to one end of the second mounting tube, and the other end has a thread matching the first screw hole; the movable pin is slidably arranged in the second mounting tube; the length-adjustable support assembly also includes a connecting rod and a handle; one end of the connecting rod is hinged to an end of the connecting screw facing the movable pin, one end of the handle is hinged to an end of the movable pin facing the connecting screw, and the other end of the connecting rod is hinged to the middle part of the handle; the second mounting tube has an avoidance groove for avoiding the handle and the connecting rod; the end of the movable pin away from the second mounting tube is rotatably connected to a second support head.

[0008] Optionally, the end of the second mounting tube on which the movable pin is mounted is provided with an inner edge extending in the direction of the central axis of the second mounting tube, and a compression spring is sleeved on the support column.

[0009] Optionally, a height adjustment component is also included, which includes a vertical plate, a side wall of the vertical plate is provided with a vertical slide groove, a slider is slidably provided in the slide groove, and the slider has a horizontal second through hole; a fixed plate is provided at the top of the vertical plate, the fixed plate has a vertical second screw hole, a control screw is provided in the second screw hole, the lower end of the control screw is rotatably connected to the upper end of the slider, and a locking screw hole is provided on the side of the fixed plate, and a first top screw is provided in the locking screw hole.

[0010] Optionally, the number of the height adjustment components is two, and the central axes of the two first through holes are collinear; the first mounting tube is simultaneously inserted into the second through holes of the two sliding blocks.

[0011] Optionally, the number of the height adjustment components is two, and the central axes of the two first through holes are collinear; the first mounting tube is inserted into the second through hole of one of the sliders, and the second mounting tube is inserted into the second through hole of the other slider.

[0012] Optionally, the side wall of the sliding block has a third screw hole, and a second top screw is arranged in the third screw hole.

[0013] Optionally, a control switch is provided on the first mounting tube, and the control switch is electrically connected to the motor.

[0014] Optionally, it also includes a positioning ring, which is fixedly connected to the first mounting tube, one end of the positioning ring abuts against the tail of the motor, and the other end abuts against one end of the connecting member facing the inside of the first mounting tube.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0016] A drilling device is used for drilling holes in a cylindrical part, comprising: a first mounting tube, an electric drill assembly, a connecting piece, and a length-adjustable support assembly. When it is necessary to drill a hole in the side wall of the cylindrical part, the drilling device is extended into the cylindrical part, the electric drill assembly and the length-adjustable support assembly are connected through the connecting piece and are in the same straight line, the drilling device is adjusted to the radial direction of the cylindrical part, and the drill bit is aligned with the position where the hole needs to be drilled, the length-adjustable support assembly can be pressed against the inner wall of the cylindrical part, and a force is applied to the inner wall of the cylindrical part through the length-adjustable support assembly. Since the force applied by the length-adjustable support assembly to the inner wall of the cylindrical part is radially outward, the reaction force of the inner wall of the cylindrical part to the length-adjustable support assembly is radially inward, and the reaction force is transmitted to the drill bit through the length-adjustable support assembly, which can be used as the feed force of the drill bit. The drilling device of this solution is used to drill from the inside of the cylindrical part, which can prevent the drill bit from slipping during drilling. The drilling device of this solution can also drill holes on the inner wall of the cylindrical part with a double-layer structure. Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a cross-sectional view of a cylindrical part in a vertically placed state;

[0019] Figure 2 is a cross-sectional view of a first drilling device provided in an embodiment of the present application;

[0020] Figure 3 is a cross-sectional view of a second drilling device provided in an embodiment of the present application;

[0021] Figure 4 yes Figure 2 or Figure 3 Left view of

[0022] Figure 5 is a schematic diagram of drilling a cylindrical part using the first drilling device provided in an embodiment of the present application;

[0023] Figure 6 is a schematic diagram of drilling a cylindrical part using a second drilling device provided in an embodiment of the present application;

[0024] Figure 7 yes Figure 6 Top view of the .

[0025] Description of Reference Numerals

[0026] 1-first mounting tube; 2-electric drill assembly; 201-motor; 202-drill chuck; 203-drill bit; 3-connecting piece; 301-first screw hole; 4-length adjustable support assembly; 401-support screw; 402-handle rod; 403-first support head; 404-second mounting tube; 4041-avoidance groove; 4042-inner edge; 405-connecting screw; 406-movable pin; 407-connecting rod; 408-handle; 409-second support head; 4010-compression spring; 5-height adjustment assembly; 501-vertical plate; 5011-slide groove; 502-slider; 5021-second through hole; 503-fixed plate; 5031-second screw hole; 504-control screw; 505-first top screw; 506-second top screw; 6-control switch; 7-positioning ring; 10-cylindrical part. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the "upper" and "lower" of the corresponding parts in the use state relative to the direction of gravity, and "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding parts' own contours. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0029] In the related art, since the thin-walled cylindrical part 10 is generally a cylindrical tube, which can be a cylindrical tube, a square tube or a polygonal tube, when drilling holes in it, it is easy for the drill bit 203 to be displaced or the tube body to be deformed, which affects the hole position accuracy and reduces the product yield. Especially for cylindrical parts, if drilling from the outside, the drill bit 203 is more likely to slip along the arc direction of the outer tube wall. In addition, refer to Figure 1 For a cylindrical part 10 with a double-layer structure, if only the inner wall of the cylinder needs to be drilled, the drilling tools in the prior art are usually difficult to drill accurately. For another example, if the inner wall of the cylindrical part 10 with a small inner diameter is inaccessible to the operator and a hole needs to be drilled in the inner wall of the cylindrical part 10 with a double-layer structure, the tools in the related art cannot achieve drilling because the operator cannot enter the inside of the cylindrical part 10.

[0030] According to one embodiment of the present disclosure, referring to Figure 2 and Figure 3 A drilling device for drilling a cylindrical part 10 may include: a first mounting cylinder 1, an electric drill assembly 2, a connecting piece 3, and a length-adjustable support assembly 4.

[0031] The electric drill assembly 2 includes a motor 201, which is installed at one end of the first mounting tube 1, and the output shaft of the motor 201 is located outside the first mounting tube 1, and a drill chuck 202 is connected to the output shaft, and a drill 203 is installed on the drill chuck 202. The connecting member 3 is installed at the other end of the first mounting tube 1. The length-adjustable support assembly 4 is connected to the end of the connecting member 3 away from the first mounting tube 1, and is used to abut against the inner wall of the cylindrical part 10 to be processed to apply a feed force to the drill 203. In this way, the electric drill assembly 2 and the length-adjustable support assembly 4 are on the same straight line. When the length-adjustable support assembly 4 applies a force to the inner wall of the cylindrical part 10, the reaction force of the cylindrical part 10 on the length-adjustable support assembly 4 can enable the drill 203 to have a feed force toward the inner wall of the cylindrical part 10.

[0032] Through the above technical solution, when it is necessary to drill a hole in the side wall of the cylindrical part 10, the drilling device is extended into the cylindrical part 10, the electric drill assembly 2 and the length-adjustable support assembly 4 are connected by the connecting piece 3 and are on the same straight line, the drilling device is adjusted to the radial direction of the cylindrical part 10, and the drill bit 203 is aligned with the position where the hole needs to be drilled, the length-adjustable support assembly 4 can be pressed against the inner wall of the cylindrical part 10, and a force is applied to the inner wall of the cylindrical part 10 through the length-adjustable support assembly 4. Since the force applied by the length-adjustable support assembly 4 to the inner wall of the cylindrical part 10 is radially outward, the reaction force of the inner wall of the cylindrical part 10 to the length-adjustable support assembly 4 is radially inward, and the reaction force is transmitted to the drill bit 203 through the length-adjustable support assembly 4, which can be used as a feed force for the drill bit 203. The drilling device of this solution is used to drill from the inside of the cylindrical part 10, which can prevent the drill bit 203 from slipping during drilling. The drilling device of this solution can also be used to drill holes on the inner wall of the cylindrical part 10 with a double-layer structure.

[0033] According to a specific embodiment of the present disclosure, Figure 2As shown in the figure, the connecting member 3 is a connecting column, and a first screw hole 301 is provided at one end of the connecting column away from the first mounting cylinder 1. When the inner diameter of the cylindrical part 10 is small, the length-adjustable support assembly 4 may include a support screw 401, and the support screw 401 has a first radial through hole (not shown in the figure), and a handle rod 402 is provided in the first through hole; one end of the support screw 401 is screwed into the first screw hole 301, and the other end of the support screw 401 is rotatably connected to a first support head 403. Reference Figure 5 The staff can rotate the handle 408 to screw the support screw 401 into or out of the first screw hole 301 of the connecting column, thereby adjusting the length of the adjustable length support assembly 4. The first support head 403 is rotatably connected to the support screw 401, which can prevent the support assembly from rubbing against the inner wall of the cylindrical part 10.

[0034] According to another specific embodiment of the present disclosure, referring to Figure 3 As shown in , the connecting member 3 may be a connecting column, and a first screw hole 301 is provided at one end of the connecting column away from the first mounting tube 1 . The length-adjustable support assembly 4 may include a second mounting tube 404, a connecting screw 405 and a movable pin 406; one end of the connecting screw 405 is fixedly connected to one end of the second mounting tube 404, and the other end has a thread matching the first screw hole 301; the movable pin 406 is slidably arranged in the second mounting tube 404; the length-adjustable support assembly 4 may also include a connecting rod 407 and a handle 408; one end of the connecting rod 407 is hinged to one end of the connecting screw 405 facing the movable pin 406, one end of the handle 408 is hinged to one end of the movable pin 406 facing the connecting screw 405, and the other end of the connecting rod 407 is hinged to the middle part of the handle 408; the second mounting tube 404 has an avoidance groove 4041 for avoiding the handle 408 and the connecting rod 407; the end of the movable pin 406 away from the second mounting tube 404 is rotatably connected to a second support head 409.

[0035] refer to Figure 6 and Figure 7, through the above technical solution, when the inner diameter of the cylindrical part 10 is large, the connecting rod 407 mechanism is used in this embodiment to adjust the length of the adjustable length support assembly 4. Specifically, when the handle 408 is lifted, since the connecting screw 405 is fixedly connected to the second mounting tube 404, the movable pin 406 is pulled by the handle 408 in the direction of retreating to the second mounting tube 404, so that it is convenient for the staff to put the drilling device into the cylindrical part 10. When the drilling device is put into the cylindrical part 10, the handle 408 is pressed down, and the handle 408 can drive the movable pin 406 to move in the direction of extending out of the second mounting tube 404, thereby increasing the length of the adjustable length support assembly 4. After starting the motor 201, the handle 408 is continued to be pressed down, and the movable pin 406 is pressed against the inner wall of the cylindrical part 10. The reaction force of the inner wall of the cylindrical part 10 on the adjustable length support assembly 4 can be used as the feed force of the drill bit 203. The drilling device using this embodiment can be used to drill a cylindrical part 10 with a large inner diameter.

[0036] According to another specific embodiment of the present disclosure, referring to Figure 3 As shown in the figure, in order to ensure that the movable pin 406 is always in the second mounting cylinder 404 or has a tendency to move into the second mounting cylinder 404 under normal circumstances, the end of the second mounting cylinder 404 on which the movable pin 406 is installed is provided with an inner edge 4042 extending in the direction of the central axis of the second mounting cylinder 404, and a compression spring 4010 is sleeved on the support column.

[0037] According to another specific embodiment of the present disclosure, referring to Figures 2 to 4 As shown in , the drilling device may further include a height adjustment component 5. The height of the drilling device may be conveniently adjusted by installing the drilling device on the height adjustment component 5. The height adjustment component 5 includes a vertical plate 501, and a vertical slide groove 5011 is provided on the side wall of the vertical plate 501. A slider 502 is slidably provided in the slide groove 5011. The slider 502 has a horizontal second through hole 5021, and the electric drill component 2 may be horizontally installed in the second through hole 5021. A fixed plate 503 is provided at the top end of the vertical plate 501. The fixed plate 503 has a vertical second screw hole 5031. A control screw 504 is provided in the second screw hole 5031. The lower end of the control screw 504 is rotatably connected to the upper end of the slider 502. A locking screw hole is provided on the side of the fixed plate 503. A first top screw 505 is provided in the locking screw hole. The height of the slider 502 may be adjusted by rotating the control screw 504, thereby adjusting the height of the electric drill component 2. Reference Figure 5 In order to facilitate the rotation of the control screw 504, a crank can be provided at the upper end of the control screw 504. A horizontal bottom plate can be provided at the lower end of the vertical plate 501 to improve stability.

[0038] According to another specific embodiment of the present disclosure, referring to Figure 2 and Figure 3 As shown in the figure, the number of the height adjustment components 5 can be two, and the central axes of the two first through holes 4011 are collinear; the first mounting cylinder 1 is simultaneously inserted into the second through holes 5021 of the two sliders 502. In this way, the drilling device can be made more stable by supporting the electric drill component 2 with two height adjustable components.

[0039] Similarly, when the length-adjustable support assembly 4 is longer, the number of the height-adjusting assemblies 5 is two, and the central axes of the two first through holes 4011 are collinear; the first mounting tube 1 is inserted into the second through hole 5021 of one of the sliders 502, and the second mounting tube 404 is inserted into the second through hole 5021 of the other slider 502. In this way, the electric drill assembly 2 and the length-adjustable support assembly 4 are supported respectively by two height-adjustable assemblies, which can also make the drilling device more stable.

[0040] According to another specific embodiment of the present disclosure, referring to Figure 4 As shown in the figure, in order to reliably fix the height adjustable component 5 to the electric drill component 2 and / or the length adjustable support component 4, the side wall of the slider 502 can have a third screw hole (not shown in the figure), and a second top screw 506 is arranged in the third screw hole.

[0041] According to another specific embodiment of the present disclosure, referring to Figure 2 and Figure 3 As shown in , in order to facilitate the control of the motor 201 , a control switch 6 is provided on the first mounting tube 1 , and the control switch 6 is electrically connected to the motor 201 .

[0042] According to another specific embodiment of the present disclosure, referring to Figure 2 and Figure 3 As shown in , the drilling device may further include a positioning ring 7, the positioning ring 7 is fixedly connected to the first mounting tube 1, one end of the positioning ring 7 abuts against the tail of the motor 201, and the other end abuts against one end of the connecting member 3 facing the inside of the first mounting tube 1. With such a design, the motor 201 and the connecting member 3 can be accurately positioned.

[0043] refer to Figures 1 to 7 The following is an example of drilling a hole on the inner wall of a double-walled cylinder to illustrate the working principle of the drilling device:

[0044] Step 1, vertically place the cylindrical part 10 (a cylinder with double-layer walls, and a hole needs to be drilled in the inner wall of the cylindrical part 10);

[0045] Step 2, lift the handle 408 to retract the movable pin 406 into the second installation cylinder 404 until the overall length of the drilling device is smaller than the inner diameter of the cylindrical part 10, and place the drilling device into the cylindrical part 10;

[0046] Step 3, rotating the control screw 504 to align the drill bit 203 of the electric drill assembly 2 with the location where a hole needs to be drilled;

[0047] Step 4, start the control switch 6, press down the handle 408, move the movable pin 406 in the direction of extending out of the second mounting tube 404, and continue to apply pressure to the handle 408 so that the end has a radially outward feed force until the drilling is completed;

[0048] Step 4, turn off the control switch 6, pull up the handle 408, move the movable pin 406 in the direction of returning to the second installation cylinder 404, take the drilling device out of the cylindrical part 10, and the drilling is completed.

[0049] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0051] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A drilling device for drilling a cylindrical part (10), characterized in that: include: A first mounting cylinder (1); An electric drill assembly (2), comprising a motor (201), the motor (201) being mounted at one end of the first mounting tube (1), and an output shaft of the motor (201) being located outside the first mounting tube (1), a drill chuck (202) being connected to the output shaft, and a drill bit (203) being mounted on the drill chuck (202); A connecting member (3) installed at the other end of the first installation tube (1); A length-adjustable support assembly (4) is connected to an end of the connecting member (3) that is away from the first mounting tube (1) and is used to abut against the inner wall of the cylindrical part (10) to be processed so as to apply a feed force to the drill bit (203).

2. The drilling device according to claim 1, characterized in that: The connecting member (3) is a connecting column, and a first screw hole (301) is provided at one end of the connecting column away from the first mounting tube (1); The length-adjustable support assembly (4) comprises a support screw (401), wherein the support screw (401) has a radial first through hole, and a handle rod (402) is arranged in the first through hole; one end of the support screw (401) is screwed into the first screw hole (301), and the other end of the support screw (401) is rotatably connected to a first support head (403).

3. The drilling device according to claim 1, characterized in that: The connecting member (3) is a connecting column, and a first screw hole (301) is provided at one end of the connecting column away from the first mounting tube (1); The length-adjustable support assembly (4) comprises a second mounting tube (404), a connecting screw (405) and a movable pin (406); one end of the connecting screw (405) is fixedly connected to one end of the second mounting tube (404), and the other end has a thread matching the first screw hole (301); The movable pin rod (406) is slidably disposed in the second mounting cylinder (404); The length-adjustable support assembly (4) also includes a connecting rod (407) and a handle (408); one end of the connecting rod (407) is hinged to one end of the connecting screw (405) facing the movable pin (406), one end of the handle (408) is hinged to one end of the movable pin (406) facing the connecting screw (405), and the other end of the connecting rod (407) is hinged to the middle part of the handle (408); the second mounting tube (404) has an avoidance groove (4041) for avoiding the handle (408) and the connecting rod (407); the end of the movable pin (406) away from the second mounting tube (404) is rotatably connected to a second support head (409).

4. The drilling device according to claim 3, characterized in that: The end of the second mounting tube (404) on which the movable pin rod (406) is mounted is provided with an inner edge (4042) extending in the direction of the central axis of the second mounting tube (404), and a compression spring (4010) is sleeved on the support column.

5. The drilling device according to claim 2 or 4, characterized in that: The height adjustment component (5) further comprises a vertical plate (501), the side wall of the vertical plate (501) being provided with a vertical slide groove (5011), a slider (502) being slidably provided in the slide groove (5011), and the slider (502) having a horizontal second through hole (5021); a fixing plate (503) being provided at the top end of the vertical plate (501), the fixing plate (503) having a vertical second screw hole (5031), a control screw (504) being provided in the second screw hole (5031), the lower end of the control screw (504) being rotatably connected to the upper end of the slider (502), a locking screw hole being provided on the side of the fixing plate (503), and a first top screw (505) being provided in the locking screw hole.

6. The drilling device according to claim 5, characterized in that: The number of the height adjustment components (5) is two, and the central axes of the two first through holes (4011) are collinear; the first mounting tube (1) is simultaneously inserted into the second through holes (5021) of the two sliding blocks (502).

7. The drilling device according to claim 5, characterized in that The number of the height adjustment components (5) is two, and the central axes of the two first through holes (4011) are collinear; the first mounting tube (1) is inserted into the second through hole (5021) of one of the sliders (502), and the second mounting tube (404) is inserted into the second through hole (5021) of the other slider (502).

8. The drilling device according to claim 7, characterized in that The side wall of the sliding block (502) has a third screw hole, and a second top screw (506) is arranged in the third screw hole.

9. The drilling device according to claim 1, characterized in that: The first mounting tube (1) is provided with a control switch (6), and the control switch (6) is electrically connected to the motor (201).

10. The drilling device according to claim 1, characterized in that It also comprises a positioning ring (7), wherein the positioning ring (7) is fixedly connected to the inside of the first mounting tube (1), one end of the positioning ring (7) abuts against the rear end of the motor (201), and the other end abuts against one end of the connecting member (3) facing the inside of the first mounting tube (1).

Images