CN107378071B - Spindle self-locking mechanism and drill tool provided with same - Google Patents
Spindle self-locking mechanism and drill tool provided with same Download PDFInfo
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- CN107378071B CN107378071B CN201710833600.XA CN201710833600A CN107378071B CN 107378071 B CN107378071 B CN 107378071B CN 201710833600 A CN201710833600 A CN 201710833600A CN 107378071 B CN107378071 B CN 107378071B
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- boss
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- disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/003—Stops attached to drilling tools, tool holders or drilling machines
- B23B49/006—Attached to drilling machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Braking Arrangements (AREA)
Abstract
The application discloses a main shaft self-locking mechanism and a drill tool provided with the same, wherein the main shaft self-locking mechanism comprises a planetary disc, a stop ring coaxially arranged with the planetary disc, a locking block coaxially arranged in the stop ring, and a self-locking pin arranged among the locking block, the planetary disc and the stop ring; the lock block is connected with a buffer spring plate which is positioned between the lock block and the axial direction of the planetary disc and can generate axial elastic deformation when being subjected to axial external force, a male boss is fixedly arranged on the end face of the side of the planetary disc, which faces the side of the planetary disc, and a female boss matched with the male boss is fixedly arranged on the end face of the buffer spring plate, which faces the side of the planetary disc. The application can reduce the brake noise of the drilling tool, improves the human-machine use feeling, and improves the taste of the product.
Description
Technical Field
The application relates to the field of drilling tools, in particular to a main shaft self-locking mechanism and a drilling tool provided with the same.
Background
The publication number US6702090 discloses a class-turning tool with a main shaft self-locking mechanism, when the number of the normal use revolution of the tool is reduced to the main shaft self-locking brake, the principle is as follows: because the electronic brake is adopted, the rotating speed of the motor side, namely the planetary disc side, is higher than that of the output shaft side, after the output shaft rotates by an angle of alpha degrees relative to the locking piece (alpha degrees are rotation fit clearances), the output shaft has a trend of driving the locking piece and the buffering elastic piece to continue to rotate relatively, but at the moment, the claw of the buffering elastic piece is embedded in the groove of the planetary disc, the trend of rotating relatively is slowed down due to the resistance of the claw, the slowing trend can lead the rotating speed of the output shaft side to drop and delay to lead the self-locking pin to be locked, the claw is stressed to compress and climb to slide into the other groove of the planetary disc, and the self-locking pin is subjected to the combined action of the locking piece and the stop ring to realize braking. The key of the successful structure is that when the claw moves in two grooves of the planetary disc under the action of external force, the relative rotation speed of the locking block and the stop ring is reduced when the self-locking pin is blocked to realize braking.
In addition to the drilling tools disclosed in the above patents, the braking schemes of the existing drilling tools have the following problems in the use process: when the main shaft self-locking is stopped to realize the braking function, the main shaft self-locking has no buffer structure, and the relative rotating speed of the locking block, the self-locking pin and the stop ring is relatively high, so that the self-locking pin is blocked by the locking block and the stop ring instantly, and the self-locking pin and the stop ring and the locking block are impacted violently to generate abnormal sound of 'click'. The abnormal sound seriously affects the use feeling of operators and reduces the taste of products.
Disclosure of Invention
The purpose of the application is as follows: to above-mentioned problem, the application provides a novel structure's main shaft self-locking mechanism, still provides one kind and has provided this kind of main shaft self-locking mechanism's brill class instrument simultaneously to effectively reduce the brake noise who bores class instrument, improved man-machine use impression, promoted the taste of product.
The technical scheme of the application is as follows:
a spindle self-locking mechanism comprising:
the planet wheel is arranged on the side of the planet wheel,
a stop ring coaxially arranged with the planetary disc,
a locking block coaxially arranged in the stop ring and
the self-locking pin is arranged among the locking block, the planetary disc and the stop ring;
the planetary disc is characterized in that a buffering elastic sheet which is positioned between the locking block and the axial direction of the planetary disc and can generate axial elastic deformation when being subjected to axial external force is connected to the locking block, a male boss is fixedly arranged on the end face of the side of the planetary disc, which faces the buffering elastic sheet, and a female boss matched with the male boss is fixedly arranged on the end face of the side of the planetary disc, which faces the buffering elastic sheet.
The main shaft self-locking mechanism further comprises the following preferable schemes on the basis of the technical scheme:
the male bosses and the female bosses are respectively provided with at least two, and the male bosses and the female bosses are uniformly distributed along the circumferential direction by taking the central axis of the planetary disc as the center.
The male boss and the female boss are respectively provided with three.
The male boss is integrally formed on the planetary disc, and the female boss is integrally formed on the buffering elastic sheet.
And inclined planes matched with each other are formed on the male boss and the female boss.
A drill-type tool comprising:
the planet wheel is arranged on the side of the planet wheel,
a motor which is in transmission connection with the planetary disc through a sun gear and a planetary gear to drive the planetary disc to rotate,
a stop ring coaxially arranged with the planetary disc,
a locking piece coaxially arranged in the stop ring,
self-locking pin connected between the locking block, planetary disc and stop ring, and
the output shaft is coaxially connected with the locking block and penetrates through the planetary disc;
the planetary disc is characterized in that a buffering elastic sheet which is positioned between the locking block and the axial direction of the planetary disc and can generate axial elastic deformation when being subjected to axial external force is connected to the locking block, a male boss is fixedly arranged on the end face of the side of the planetary disc, which faces the buffering elastic sheet, and a female boss matched with the male boss is fixedly arranged on the end face of the side of the planetary disc, which faces the buffering elastic sheet.
The drilling tool further comprises the following preferable schemes on the basis of the technical scheme:
the male bosses and the female bosses are respectively provided with at least two, and the male bosses and the female bosses are uniformly distributed along the circumferential direction by taking the central axis of the planetary disc as the center.
The male boss and the female boss are respectively provided with three.
And inclined planes matched with each other are formed on the male boss and the female boss.
The male boss is integrally formed on the planetary disc, and the female boss is integrally formed on the buffering elastic sheet.
The application has the following beneficial effects: the main shaft self-locking mechanism for the drilling tool can effectively reduce the braking noise of the tool, improves the man-machine use feeling and improves the taste of products.
Drawings
The present application is further described with reference to the accompanying drawings and specific embodiments:
FIG. 1 is a schematic structural diagram of a spindle self-locking mechanism in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a spindle self-locking mechanism in a non-self-locking state according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a spindle self-locking mechanism in a self-locking state according to an embodiment of the present application;
wherein: the planetary gear comprises a 1-planetary disk, a 1 a-male boss, a 2-stop ring, a 3-locking block, a 4-self-locking pin, a 5-output shaft, a 6-buffering elastic piece and a 6 a-female boss.
Detailed Description
Fig. 1 to 3 show a specific application example of the spindle self-locking mechanism in a drill tool, which is the same as a conventional drill tool (for example, US6702090, US patent), and also comprises a tool housing (not shown in the drawings), wherein a motor for providing power is arranged in the tool housing, a motor shaft of the motor is connected with a planetary disc 1 through a sun gear and a planetary gear, the planetary disc 1 is rotatably arranged in the tool housing, a stop ring 2 is relatively fixed with the tool housing, the stop ring 2 is coaxially arranged with the planetary disc 1, a locking block 3 is arranged in the stop ring 2, and the locking block 3 is coaxially connected with an output shaft 5. Specifically, the cross section of the output shaft 5 is non-circular, a non-circular hole with the same shape and size as the cross section of the output shaft is formed in the middle of the locking block 3, and the output shaft 5 is arranged in the non-circular hole in the middle of the locking block 3 in a penetrating manner, so that the output shaft and the locking block are relatively fixed in the circumferential direction. And, the middle part of planetary dish 1 also has offered a non-round hole bigger than output shaft 5 cross-sectional dimension, and output shaft 5 penetrates in the non-round hole of this planetary dish 1. Six self-locking pins 4 are arranged among the locking block 3, the stop ring 2 and the planetary disc 1. The self-locking pin 4, the locking piece 3, the stop ring 2 and the planetary disc 1 are not completely fastened and matched, but can relatively move within a certain range.
The key improvement of this embodiment is: the lock block 3 is fixedly connected with a buffer spring plate 6, and the buffer spring plate is positioned between the lock block 3 and the planetary disc 1 in the axial direction, namely, the buffer spring plate 6 is arranged on the side, close to the planetary disc 1, of the lock block 3. And, the planetary plate 1 is provided with three public boss 1a of circumference equipartition on the terminal surface of buffering shell fragment 6 that side towards, buffering shell fragment 6 is provided with fixedly on the terminal surface of planetary plate 1 that side with public boss 1a matched with three female boss 6a.
The term "axial direction" as used herein refers to the direction of the planetary disc unless otherwise specified.
Referring to fig. 2, during normal operation, the motor operates to drive the planetary disc 1 to rotate around its own axis through the sun gear and the planetary gear, three axially extending protrusions (not labeled in the drawing) on the planetary disc 1 respectively push three of the self-locking pins 4 to move counterclockwise, and when the planetary disc 1 rotates by a certain angle to make the non-circular hole wall in the middle of the planetary disc abut against the flat wall surface (as shown in fig. 1) of the output shaft 5, the output shaft 5 is directly driven to rotate through the planetary disc 1, and the locking block 3 rotates along with the output shaft 5. At this time, the planetary disc 1 and the locking block 3 are relatively static, the six self-locking pins 4 are all located in a wide space between the locking block 3 and the stop ring 2, and the locking block 3 and the stop ring 2 cannot be locked, so that the locking block 3 can be always in a rotating state under the drive of the output shaft 5.
Referring to fig. 3, in the process of self-locking of the tool spindle, the rotation speed of the planetary disc 1 drops rapidly due to the electronic brake on the motor side (i.e. the planetary disc side), and the moment of inertia on the output shaft 5 side (i.e. the locking piece side) is large, so that there is a tendency of relative rotation between the planetary disc 1 and the locking piece 3 (because the output shaft 5 drives the locking piece 3 to rotate synchronously), and at this time, the rotation speed difference between the planetary disc 1 and the locking piece 3 is large. In the present embodiment, the male boss 1a on the planetary disc 1 and the female boss 6a on the buffer spring 6 are prevented from rotating relatively, so as to reduce the rotation speed difference. When the planetary disc 1 rotates relative to the locking piece 3, the male boss 1a and the female boss 6a are mutually abutted, so that the male boss 1a applies axial thrust towards the locking piece to the female boss 6a, and under the action of the axial thrust, the buffer elastic piece 6 generates axial deformation towards the locking piece 3. The female boss 6a climbs over the male boss 1a, and the relative rotation speed of the planetary disc 1 and the locking piece 3 is reduced through mutual obstruction of the male boss and the female boss, namely, the rotation speed of the locking piece 3 relative to the brake ring 2 is also effectively reduced. The noise source for generating the 'click' of the brake noise is the impact sound of the three parts of the locking block 3, the self-locking pin 4 and the stop ring 3, so that the brake noise can be effectively reduced by reducing the rotation speed difference of the three parts, and the relative rotation speeds of the three parts of the locking block, the self-locking pin and the stop ring are obviously reduced through the actions of the male boss 1a and the female boss 6a by the reasoning. When the female boss 6a of the locking piece passes over the male boss 1a on the planetary disc, the rotation angle of the locking piece 3 (driven by the inertia of the output shaft) relative to the planetary disc 1 is theta, the rotation of the locking piece 3 can stir the corresponding three self-locking shoes 4 to move into the narrow space between the locking piece 3 and the stop ring 2, so that the three self-locking pins 4 are blocked between the stop ring 2 and the locking piece 3, the locking piece 3 and the stop ring 4 are relatively static, the output shaft 5 stops rotating, and the self-locking effect of the main shaft (namely the output shaft 5) occurs.
The above working principle can also be referred to in U.S. patent publication No. US 6702090.
In order to ensure that the female boss 6a can smoothly cross the male boss 1a in the self-locking process, the male boss 1a and the female boss 6a in the embodiment are formed with matched inclined planes, which can be flat inclined planes, arc inclined planes or spherical inclined planes.
Normally, the buffer spring 6 is spaced from the locking piece 3 by a certain distance in the axial direction, so that the buffer spring 6 is ensured to have a corresponding axial deformation space in the process of the main shaft self-locking action.
The buffer spring 6 is usually a steel sheet.
In this embodiment, the male boss 1a is integrally formed on the planetary disc 1, that is, the male boss 1a and the planetary disc 1 are integrally formed, however, we can also set the male boss 1a and the planetary disc 1 as separate connection structures, such as: the male boss 1a is provided as a screw screwed with the planetary disc 1.
In this embodiment, the female boss 6a is integrally formed on the buffering elastic sheet 6, i.e. the two are of an integral structure. And the female boss 6a is punched on the buffer spring 6.
The number of the male bosses 1a and the female bosses 6a is not limited to three, and may be one, two, four, or the like. However, in order to ensure the effect of the male and female bosses on reducing the braking noise, it is generally preferable to provide two or more male bosses 1a and female bosses 6a.
Of course, the foregoing embodiments are merely illustrative of the technical concept and features of the present application, and are intended to enable people to understand the content of the present application and implement the same, not to limit the protection scope of the present application. All equivalent changes or modifications made according to the spirit of the main technical solutions of the present application should be covered in the protection scope of the present application.
Claims (10)
1. A spindle self-locking mechanism comprising:
a planetary plate (1),
a stop ring (2) coaxially arranged with the planetary plate (1),
a locking block (3) coaxially arranged in the stop ring (2), and
a plurality of self-locking pins (4) arranged among the locking block (3), the planetary disc (1) and the stop ring (2);
it is characterized in that the method comprises the steps of,
the novel planetary disc is characterized in that the locking piece (3) is connected with a buffering elastic piece (6) which is positioned between the locking piece (3) and the axial direction of the planetary disc (1) and can generate axial elastic deformation when being subjected to axial external force, the planetary disc (1) faces the end face of one side of the buffering elastic piece (6) to be fixedly provided with a male boss (1 a), and the buffering elastic piece (6) faces the end face of one side of the planetary disc (1) to be fixedly provided with a female boss (6 a) matched with the male boss (1 a).
2. Spindle self-locking mechanism according to claim 1, characterized in that the male boss (1 a) and the female boss (6 a) are each provided with at least two, and that the male boss (1 a) and the female boss (6 a) are each uniformly distributed in the circumferential direction centering on the central axis of the planetary disc (1).
3. Spindle self-locking mechanism according to claim 2, characterized in that the male boss (1 a) and the female boss (6 a) are each provided with three.
4. Spindle self-locking mechanism according to claim 1, characterized in that the male boss (1 a) is integrally formed on the planetary disc (1), and the female boss (6 a) is integrally formed on the buffer spring (6).
5. Spindle self-locking mechanism according to claim 1, characterized in that the male boss (1 a) and the female boss (6 a) are formed with mating bevels.
6. A drill-type tool comprising:
a planetary plate (1),
a motor which is in transmission connection with the planetary disc (1) through a sun gear and a planetary gear so as to drive the planetary disc to rotate,
a stop ring (2) coaxially arranged with the planetary plate (1),
a locking block (3) coaxially arranged in the stop ring (2),
a plurality of self-locking pins (4) arranged among the locking block (3), the planetary disc (1) and the stop ring (2), and
an output shaft (5) coaxially connected with the lock block (3) and penetrating into the planetary disc (1);
it is characterized in that the method comprises the steps of,
the novel planetary disc is characterized in that the locking piece (3) is connected with a buffering elastic piece (6) which is positioned between the locking piece (3) and the axial direction of the planetary disc (1) and can generate axial elastic deformation when being subjected to axial external force, the planetary disc (1) faces the end face of one side of the buffering elastic piece (6) to be fixedly provided with a male boss (1 a), and the buffering elastic piece (6) faces the end face of one side of the planetary disc (1) to be fixedly provided with a female boss (6 a) matched with the male boss (1 a).
7. Drill-type tool according to claim 6, characterized in that the male boss (1 a) and the female boss (6 a) are each provided with at least two, and that the male boss (1 a) and the female boss (6 a) are each evenly distributed in circumferential direction centering on the central axis of the planetary disc (1).
8. Drill-type tool according to claim 7, characterized in that the male boss (1 a) and the female boss (6 a) are each provided with three.
9. The drill-type tool according to claim 6, further comprising a tool housing, wherein the male boss (1 a) and the female boss (6 a) are formed with mating inclined surfaces.
10. Drill-type tool according to claim 6, characterized in that the male boss (1 a) is integrally formed on the planetary disc (1), and the female boss (6 a) is integrally formed on the buffer dome (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833600.XA CN107378071B (en) | 2017-09-15 | 2017-09-15 | Spindle self-locking mechanism and drill tool provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833600.XA CN107378071B (en) | 2017-09-15 | 2017-09-15 | Spindle self-locking mechanism and drill tool provided with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107378071A CN107378071A (en) | 2017-11-24 |
| CN107378071B true CN107378071B (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710833600.XA Active CN107378071B (en) | 2017-09-15 | 2017-09-15 | Spindle self-locking mechanism and drill tool provided with same |
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| Country | Link |
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| CN (1) | CN107378071B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2411090Y (en) * | 1999-12-27 | 2000-12-20 | 车王电子股份有限公司 | Dynamic one-way output control device |
| CN101422896B (en) * | 2007-11-01 | 2012-03-28 | 苏州宝时得电动工具有限公司 | Impact drill |
| DE202009005187U1 (en) * | 2008-11-24 | 2009-10-29 | Zhejiang Sanou Machinery Co. Ltd., Taizhou | Keyless drill chuck with self-locking |
| CN201455349U (en) * | 2009-07-31 | 2010-05-12 | 东莞群胜粉末冶金有限公司 | Self-locking device as well as electric drill and electric screw driver provided with same |
| CN202280764U (en) * | 2011-11-07 | 2012-06-20 | 宋保通 | Bidirectional self-locking brake |
| CN204295653U (en) * | 2014-11-04 | 2015-04-29 | 东莞百事得电动工具有限公司 | The self-locking device of electric tool output shaft |
| CN207239232U (en) * | 2017-09-15 | 2018-04-17 | 锐奇控股股份有限公司 | Main shaft self-locking mechanism and the drill kind tool for configuring the mechanism |
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2017
- 2017-09-15 CN CN201710833600.XA patent/CN107378071B/en active Active
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| CN107378071A (en) | 2017-11-24 |
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