CN109676361B - Tool bit changing conversion device with protection function - Google Patents
Tool bit changing conversion device with protection function Download PDFInfo
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- CN109676361B CN109676361B CN201811578098.3A CN201811578098A CN109676361B CN 109676361 B CN109676361 B CN 109676361B CN 201811578098 A CN201811578098 A CN 201811578098A CN 109676361 B CN109676361 B CN 109676361B
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- limiting shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a tool bit changing conversion device with a protection function, which belongs to the technical field of aviation equipment and comprises: the device comprises a rear-section limiting shell, a first compression spring, a limiting pin, a front-section limiting shell, a cutter bit, a protective cover and a switching cylinder; the limiting pin is arranged in a central hole of the front limiting shell; the end of the stepped hole large-diameter end of the front limiting shell is fixedly connected with the end of the groove of the rear limiting shell in an abutting mode; the first compression spring is arranged in the front section limiting shell and the rear section limiting shell; the end of the front section limiting shell where the regular hexagonal hole is located is sleeved in one end of the adapter cylinder; the protective cover is fixed in the other end of the adapter cylinder; the screwdriver head penetrates through the protective cover, is matched with the regular hexagonal hole of the front-section limiting shell and abuts against the tail part of the limiting pin in the front-section limiting shell; the invention can safely and reliably decompose the screw quickly, and avoid damaging airplane components, thereby greatly improving the production efficiency.
Description
Technical Field
The invention belongs to the technical field of aviation equipment, and particularly relates to a tool bit changing conversion device with a protection function.
Background
The aircraft is repairing the in-process, often can involve the work link of decomposing a large amount of screws, in order to raise the efficiency, has adopted the wind trigger of being equipped with to change the tool bit to decompose, nevertheless can appear often changing the condition that the tool bit slided out from the screw notch in the decomposition process to make personnel's safety and product quality receive the influence. Therefore, a need exists for a conversion device that prevents the screwdriver bit from slipping out when the screw is disassembled.
Disclosure of Invention
In view of this, the invention provides a tool bit changing device with a protection function, which can safely and reliably quickly decompose a screw, and avoid damage to aircraft components, thereby greatly improving the production efficiency.
The invention is realized by the following technical scheme:
a bit changing conversion device with a protection function comprises: the device comprises a rear-section limiting shell, a first compression spring, a limiting pin, a front-section limiting shell, a cutter bit, a protective cover, a gasket and a switching cylinder;
one end of the rear-section limiting shell is provided with a groove, the other end of the rear-section limiting shell is provided with a regular hexagonal column, and the regular hexagonal column is used for being matched with a pneumatic wrench;
the central hole of the front-section limiting shell consists of a stepped hole and a regular hexagonal hole, and the small-diameter end of the stepped hole is butted with the regular hexagonal hole; a shaft shoulder is processed at the end part of the front section limiting shell where the regular hexagonal hole is located;
the inner diameter of the protective cover is larger than the diameter of the head of the screw to be disassembled;
the overall connection relationship is as follows: the limiting pin is arranged in a central hole of the front-section limiting shell, and the head of the limiting pin is axially limited through a step surface A of a stepped hole of the front-section limiting shell;
the end of the stepped hole large-diameter end of the front limiting shell is fixedly connected with the end of the groove of the rear limiting shell in a butt joint mode, and the stepped hole large-diameter end and the circular groove form a cylindrical cavity; the first compression spring is arranged in the cavity, and two ends of the first compression spring are respectively abutted against the bottom of the groove and the head of the limiting pin in the central hole of the front-section limiting shell, so that the head of the limiting pin is abutted against the step surface A of the stepped hole of the front-section limiting shell;
the end of the front section limiting shell where the regular hexagonal hole is located is sleeved in one end of the adapter cylinder, and the front section limiting shell and the adapter cylinder are in clearance hole shaft fit and can rotate relative to each other; the shaft shoulder of the front-section limiting shell is in contact with the inner bottom surface of the adapter cylinder, the end surface of the front-section limiting shell where the shaft shoulder is located is in contact with a gasket fixed in the adapter cylinder, and the inner bottom surface of the adapter cylinder and the gasket are used for axially limiting the front-section limiting shell;
the protective cover is fixed in the other end of the adapter cylinder, and a set gap is reserved between the end face of the protective cover and the gasket;
the screwdriver head penetrates through the protective cover and the gasket, is matched with the regular hexagonal hole of the front-section limiting shell and abuts against the tail part of the limiting pin in the front-section limiting shell; the cutter head can move along the axial direction of the cutter head, and a first compression spring is compressed through a limiting pin; when the tool bit does not work, the tool bit end of the tool bit extends out of the protective cover under the action of the first compression spring; during operation, change the tool bit and pass through the first compression spring of compression and retract to the safety cover in, and retract the back that targets in place, change the tool bit end of tool bit and the terminal surface parallel and level of safety cover.
Further, the method also comprises the following steps: the set screw, the second compression spring and the steel ball are tightened;
a radial threaded hole communicated with the regular hexagonal hole is processed at the end part of the regular hexagonal hole of the front-section limiting shell, the bottom of the radial threaded hole is a conical hole, and the small end of the conical hole is intersected with the regular hexagonal hole;
the steel balls are arranged in radial threaded holes of the front section limiting shell and are limited in motion through conical holes in the bottom of the radial threaded holes; the set screw and the second compression spring are both arranged in the radial threaded hole, and two ends of the second compression spring are respectively abutted against the steel ball and the set screw, so that the steel ball partially extends out of the conical hole and is abutted against the side surface of the screwdriver head positioned in the front-section limiting shell; and the set screw does not extend out of the outer circumferential surface of the front section limiting shell.
Further, an annular groove for locking the position is machined in the screwdriver head;
when the end of the screwdriver bit is flush with the end face of the protective cover, the steel ball in the front section limiting shell is matched with the annular groove on the screwdriver bit.
Further, a step surface is arranged at the joint of the small-diameter end of the stepped hole of the front-section limiting shell and the regular hexagonal hole;
when the tool bit end of changing the tool bit was during with the terminal surface parallel and level of safety cover, the tool bit looks remote site that changes the tool bit was inconsistent with the step face of the spacing casing shoulder hole path end of anterior segment and regular hexagon hole butt joint department.
Further, the adapter cylinder is fixedly connected with the protective cover through threads.
Furthermore, the butt joint and the fixed connection mode of the front-section limit shell and the rear-section limit shell are welded.
Further, the gasket is made of stainless steel.
Furthermore, the set screw is a flat-end set screw.
Has the advantages that: (1) the extension amount of the screwdriver head is controlled by the compression springs and the limiting pins in the front limiting shell and the rear limiting shell, so that the visual induction in the process of placing the screwdriver head into the screw notch is facilitated; when the conversion device is stressed, the first compression spring is compressed through the limiting pin, so that the screwdriver head is retracted into the protective cover and is flush with the protective cover, the screwdriver head is not easy to slide out of a screw notch under the action of the protective cover in the process of disassembling the screw, the screw is further disassembled safely and reliably, damage to aircraft components is avoided, and production efficiency is greatly improved; the aircraft repair quality is improved, and the operation safety of personnel is ensured.
(2) The adapter cylinder and the front section limiting shell for fixing the screwdriver head are assembled through the hole shaft in clearance fit, so that the protective cover cannot rotate together due to the rotation of the front section limiting shell, and peripheral components of a screw are prevented from being scratched.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an exploded assembly view of the component of the present invention;
FIG. 3 is a cross-sectional view of the device of the present invention;
FIG. 4 is a schematic structural view of a front-end limiting housing;
FIG. 5 is a schematic view of the structure of the screwdriver bit inside the protective cover;
FIG. 6 is an enlarged view at I of FIG. 5;
FIG. 7 is a schematic diagram of the operation of the present invention;
wherein, 1-the rear section limit shell; 2-a first compression spring; 3-limit pin; 4-front-section limiting shell; 5, changing a cutter head; 6, a protective cover; 7-a gasket; 8, a switching cylinder; 9-set screws; 10-a second compression spring; 11-steel balls; 12-pneumatic trigger; 13-a screw; 14-structural sheet material.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The present embodiment provides a tool changer with protection function, referring to fig. 1 to 3, including: the device comprises a rear-section limiting shell 1, a first compression spring 2, a limiting pin 3, a front-section limiting shell 4, a screwdriver head 5, a protective cover 6, a gasket 7, an adapter sleeve 8, a set screw 9, a second compression spring 10 and a steel ball 11;
one end of the rear-section limiting shell 1 is provided with a circular groove, and the other end of the rear-section limiting shell is provided with a regular hexagonal column which is used for being matched with a pneumatic wrench 12;
referring to fig. 4, the central hole of the front-section limiting shell 4 is composed of a stepped hole and a regular hexagonal hole, the small-diameter end of the stepped hole is in butt joint with the regular hexagonal hole, and a step surface B is arranged at the butt joint, namely the inner diameter of the small-diameter end of the stepped hole is smaller than the diameter of an inscribed circle of the regular hexagonal hole; a shaft shoulder is processed at the end part of the front-section limiting shell 4 where the regular hexagonal hole is located, a radial threaded hole communicated with the regular hexagonal hole is processed at the end part, the bottom of the radial threaded hole is a tapered hole, and the small end of the tapered hole is intersected with the regular hexagonal hole;
a step-shaped through hole is processed on the adapter cylinder 8, and an internal thread is processed on the large-diameter section of the step-shaped through hole;
an external thread is processed at one end of the protective cover 6, the inner diameter of the other end of the protective cover is designed according to the diameter of the head of the screw 13 to be disassembled, namely the inner diameter is larger than the diameter of the head of the screw 13, and when the protective cover is used, the head of the screw 13 is positioned in the protective cover 6 and used for preventing the screwdriver head 5 from sliding out of a notch of the screw 13;
an annular groove for locking the position is machined in the cutter head 5;
the gasket 7 is made of stainless steel;
the set screw 9 is a flat-end set screw;
the overall connection relationship is as follows: the limiting pin 3 is arranged in a central hole of the front-section limiting shell 4, and the head of the limiting pin 3 is axially limited through a step surface A of a stepped hole of the front-section limiting shell 4;
the end of the stepped hole large-diameter end of the front limiting shell 4 is fixedly connected with the end of the circular groove of the rear limiting shell 1 in a butt joint mode through welding, and the stepped hole large-diameter end and the circular groove form a cylindrical cavity; the first compression spring 2 is arranged in the cavity, and two ends of the first compression spring respectively abut against the bottom of the circular groove and the head of the limiting pin 3 in the central hole of the front-section limiting shell 4, so that the head of the limiting pin 3 abuts against the step surface A of the stepped hole of the front-section limiting shell 4;
the steel balls 11 are arranged in radial threaded holes of the front section limiting shell 4 and are limited in motion through conical holes in the bottom of the radial threaded holes, so that the steel balls 11 are prevented from falling into regular hexagonal holes of the front section limiting shell 4; the set screw 9 and the second compression spring 10 are both arranged in the radial threaded hole, and two ends of the second compression spring 10 are respectively abutted against the steel ball 11 and the set screw 9, so that the steel ball 11 partially extends out of the tapered hole; wherein, the set screw 9 can not extend out of the outer circumference of the front-section limiting shell 4 after being installed;
the end of the front-section limiting shell 4 where the regular hexagonal hole is located is sleeved in the small-diameter section of the stepped through hole of the adapter cylinder 8, the front-section limiting shell 4 and the adapter cylinder 8 are in clearance hole shaft fit, and the front-section limiting shell and the adapter cylinder can rotate relatively; the shaft shoulder of the front-section limiting shell 4 is in contact with the inner bottom surface of the adapter cylinder 8, the end surface of the front-section limiting shell 4 where the shaft shoulder is located is in contact with a gasket 7 fixed in the adapter cylinder 8, and the inner bottom surface of the adapter cylinder 8 and the gasket 7 are used for axially limiting the front-section limiting shell 4;
the protective cover 6 is in threaded connection with the large-diameter section of the stepped through hole of the adapter cylinder 8, and a set gap is reserved between the end face of the protective cover 6 and the gasket 7 and used for preventing the influence of the rotation of the front-section limiting shell 4 on the protective cover 6 through the gasket 7;
the tail end of the cutter head 5 (namely the opposite end of the cutter head) is matched with the regular hexagonal hole of the front-section limiting shell 4 after passing through the protective cover 6 and the gasket 7, and is propped against the tail part of the limiting pin 3 in the front-section limiting shell 4, and the side surface of the cutter head 5 is propped against the steel ball 11 in the front-section limiting shell 4; the screwdriver head 5 can move along the axial direction of the screwdriver head and compresses the first compression spring 2 through the limiting pin 3; when the screw driver is not in operation, the bit end of the bit 5 extends out of the protective cover 6 under the action of the first compression spring 2, so that the bit 5 is conveniently placed in the notch of the screw 13 to be disassembled; in operation, referring to fig. 5-6, the rear-section limiting shell 1 is pushed to move the cutter head 5 and the limiting pin 3 towards the rear-section limiting shell 1, the first compression spring 2 is compressed until the tail end of the cutter head 5 abuts against the step surface B of the butt joint of the hexagonal hole and the stepped hole small-diameter end of the front-section limiting shell 4, meanwhile, the steel ball 11 in the front-section limiting shell 4 is matched with the annular groove on the cutter head 5 to lock the position of the cutter head 5, and at the moment, the cutter head end of the cutter head 5 is flush with the end surface of the protective cover 6.
The working principle is as follows: referring to fig. 7, the assembled conversion device is mounted on a pneumatic trigger 12 through a regular hexagonal column of the rear-section limiting shell 1; inserting the tool bit of the tool bit 5 into a notch of a screw 13 to be decomposed on a structural sheet 14, and enabling the axis of the tool bit 5 to be vertical to the structural sheet 14; applying pressure to the pneumatic wrench 12 to retract the screwdriver head 5 into the protective cover 6; finally, the pneumatic wrench 12 is controlled to rotate to drive the rear section limiting shell 1, the front section limiting shell 4 and the screwdriver head 5 to synchronously rotate, and the protective cover 6 and the adapter sleeve 8 do not rotate; the screwdriver bit 5 is rotated to disassemble the screw 13 from the structural sheet 14; during disassembly, the screwdriver bit 5 cannot slide out of the slot of the screw 13 under the restriction of the protective cap 6.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A bit conversion device with a protection function is characterized by comprising: the device comprises a rear-section limiting shell (1), a first compression spring (2), a limiting pin (3), a front-section limiting shell (4), a screwdriver head (5), a protective cover (6), a gasket (7) and an adapter (8);
one end of the rear-section limiting shell (1) is provided with a circular groove, the other end of the rear-section limiting shell is provided with a regular hexagonal column, and the regular hexagonal column is used for being matched with a pneumatic wrench (12);
the central hole of the front-section limiting shell (4) consists of a stepped hole and a regular hexagonal hole, and the small-diameter end of the stepped hole is in butt joint with the regular hexagonal hole; a shaft shoulder is processed at the end part of the front section limiting shell (4) where the regular hexagonal hole is located;
the inner diameter of the protective cover (6) is larger than the diameter of the head of the screw (13) to be disassembled;
the overall connection relationship is as follows: the limiting pin (3) is arranged in a central hole of the front-section limiting shell (4), and the head of the limiting pin (3) is axially limited through a step surface A of a stepped hole of the front-section limiting shell (4);
the end of the stepped hole large-diameter end of the front limiting shell (4) is fixedly connected with the end of the circular groove of the rear limiting shell (1) in a butt joint mode, and the stepped hole large-diameter end and the circular groove form a cylindrical cavity; the first compression spring (2) is arranged in the cavity, and two ends of the first compression spring (2) are respectively abutted against the bottom of the circular groove and the head of the limiting pin (3) in the central hole of the front-section limiting shell (4), so that the head of the limiting pin (3) is abutted against the step surface A of the stepped hole of the front-section limiting shell (4);
the end of the front section limiting shell (4) where the regular hexagonal hole is located is sleeved in one end of the adapter cylinder (8), the front section limiting shell (4) is in clearance hole shaft fit with the adapter cylinder (8), and the front section limiting shell and the adapter cylinder can rotate relative to each other; the shaft shoulder of the front-section limiting shell (4) is in contact with the inner bottom surface of the adapter cylinder (8), the end surface of the end where the shaft shoulder of the front-section limiting shell (4) is located is in contact with a gasket (7) fixed in the adapter cylinder (8), and the inner bottom surface of the adapter cylinder (8) and the gasket (7) are used for axially limiting the front-section limiting shell (4);
the protective cover (6) is fixed in the other end of the adapter cylinder (8), and a set gap is reserved between the end face of the protective cover (6) and the gasket (7);
the cutter head (5) penetrates through the protective cover (6) and the gasket (7), is matched with a regular hexagonal hole of the front-section limiting shell (4), and is abutted against the tail part of the limiting pin (3) in the front-section limiting shell (4); the cutter head (5) can move along the axial direction of the cutter head, and the first compression spring (2) is compressed through the limiting pin (3); when the tool bit is not in operation, the tool bit end of the tool bit (5) extends out of the protective cover (6) under the action of the first compression spring (2); when the tool is in work, the tool bit (5) retracts into the protective cover (6) by compressing the first compression spring (2), and after the tool bit retracts in place, the tool bit end of the tool bit (5) is flush with the end face of the protective cover (6).
2. The bit changing device with protection function as claimed in claim 1, further comprising: a set screw (9), a second compression spring (10) and a steel ball (11);
a radial threaded hole communicated with the regular hexagonal hole is processed at the end part of the regular hexagonal hole of the front section limiting shell (4), the bottom of the radial threaded hole is a conical hole, and the small end of the conical hole is intersected with the regular hexagonal hole;
the steel balls (11) are arranged in radial threaded holes of the front section limiting shell (4) and are limited in movement through conical holes in the bottom of the radial threaded holes; the set screw (9) and the second compression spring (10) are both arranged in the radial threaded hole, and two ends of the second compression spring (10) are respectively abutted against the steel ball (11) and the set screw (9), so that the steel ball (11) partially extends out of the conical hole and is abutted against the side surface of the screwdriver head (5) positioned in the front-section limiting shell (4); and the set screw (9) does not extend out of the outer circumferential surface of the front section limiting shell (4).
3. The bit changing device with the protection function as claimed in claim 2, characterized in that the bit (5) is provided with an annular groove for locking the position;
when the end surface of the cutter head (5) is flush with the end surface of the protective cover (6), the steel ball (11) in the front section limiting shell (4) is matched with the annular groove on the cutter head (5).
4. The bit changing conversion device with the protection function as claimed in claim 1, wherein a step surface is provided at the joint of the small diameter end of the stepped hole of the front-section limiting shell (4) and the regular hexagonal hole;
when the end face of the cutter head end of the cutter head (5) is flush with the end face of the protective cover (6), the opposite end of the cutter head (5) is abutted against the step face of the butt joint of the stepped hole small diameter end of the front section limiting shell (4) and the regular hexagonal hole.
5. The tool bit changing device with the protection function as claimed in claim 1, wherein the adapter cylinder (8) is fixedly connected with the protective cover (6) through threads.
6. The tool bit changing conversion device with the protection function as claimed in claim 1, wherein the butt joint fixing mode of the front section limit shell (4) and the rear section limit shell (1) is welding.
7. The bit-changing head converting device with the protection function as claimed in claim 1, wherein the washer (7) is made of stainless steel material.
8. The bit-changing head converting device with protection function as claimed in claim 2, characterized in that said set screw (9) is a flat set screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811578098.3A CN109676361B (en) | 2018-12-20 | 2018-12-20 | Tool bit changing conversion device with protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811578098.3A CN109676361B (en) | 2018-12-20 | 2018-12-20 | Tool bit changing conversion device with protection function |
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| Publication Number | Publication Date |
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| CN109676361A CN109676361A (en) | 2019-04-26 |
| CN109676361B true CN109676361B (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811578098.3A Active CN109676361B (en) | 2018-12-20 | 2018-12-20 | Tool bit changing conversion device with protection function |
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| CN (1) | CN109676361B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113043219A (en) * | 2021-03-19 | 2021-06-29 | 哈尔滨工业大学 | Mounting device for automatic target replacement in inertial confinement fusion |
| CN113075128A (en) * | 2021-04-06 | 2021-07-06 | 武汉佰力博科技有限公司 | Probe mechanism and variable-temperature vacuum probe platform |
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|---|---|---|---|---|
| EP0229250A1 (en) * | 1985-12-14 | 1987-07-22 | Robert Bosch Gmbh | Screw drive apparatus with measuring equipment for determination of translatoric movement |
| CN1610603A (en) * | 2002-01-28 | 2005-04-27 | 芝加哥气动工具公司 | Power impact tool torque apparatus |
| CN201143656Y (en) * | 2007-11-28 | 2008-11-05 | 庄嘉琼 | Mechanism for stabilizing driving medium output torsion |
| CN202029086U (en) * | 2011-02-23 | 2011-11-09 | 长城汽车股份有限公司 | Certain torque bit used in pneumatic percussion |
| CN102837284A (en) * | 2012-08-22 | 2012-12-26 | 天津鹏翎胶管股份有限公司 | Safety protection device for long handle pneumatic screwdriver |
| CN105171666A (en) * | 2015-09-30 | 2015-12-23 | 宁波市创佳工业设计有限公司 | Screwdriver bit conversion mechanism |
-
2018
- 2018-12-20 CN CN201811578098.3A patent/CN109676361B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0229250A1 (en) * | 1985-12-14 | 1987-07-22 | Robert Bosch Gmbh | Screw drive apparatus with measuring equipment for determination of translatoric movement |
| CN1610603A (en) * | 2002-01-28 | 2005-04-27 | 芝加哥气动工具公司 | Power impact tool torque apparatus |
| CN201143656Y (en) * | 2007-11-28 | 2008-11-05 | 庄嘉琼 | Mechanism for stabilizing driving medium output torsion |
| CN202029086U (en) * | 2011-02-23 | 2011-11-09 | 长城汽车股份有限公司 | Certain torque bit used in pneumatic percussion |
| CN102837284A (en) * | 2012-08-22 | 2012-12-26 | 天津鹏翎胶管股份有限公司 | Safety protection device for long handle pneumatic screwdriver |
| CN105171666A (en) * | 2015-09-30 | 2015-12-23 | 宁波市创佳工业设计有限公司 | Screwdriver bit conversion mechanism |
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| CN109676361A (en) | 2019-04-26 |
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