CN214186605U - Lower pressing plate for angle grinder - Google Patents
Lower pressing plate for angle grinder Download PDFInfo
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- CN214186605U CN214186605U CN202023183743.7U CN202023183743U CN214186605U CN 214186605 U CN214186605 U CN 214186605U CN 202023183743 U CN202023183743 U CN 202023183743U CN 214186605 U CN214186605 U CN 214186605U
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- connecting screw
- angle grinder
- locking
- locking mechanism
- check ring
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Abstract
The utility model discloses a lower pressure plate for an angle grinder, which comprises a connecting screw, a retainer ring, a middle sleeve, an axial retainer ring and a locking mechanism; the locking mechanism is arranged in a wedge-shaped built-in space enclosed by the connecting screw, the check ring and the middle sleeve, the connecting screw comprises an internal thread connected with a spindle of the angle grinder, the connecting screw is axially and fixedly positioned with the check ring through the axial check ring, the middle sleeve is sleeved on the peripheries of the connecting screw and the check ring and is fixedly positioned by the locking mechanism in a locking manner, and the locking mechanism can lock or unlock the tight fit of the check ring and the grinding wheel or the cutting blade of the angle grinder while rotating the middle sleeve. The utility model provides a lower pressure plate can realize quick, simple dismantlement and fixed, can manual dismantlement lower pressure plate even.
Description
Technical Field
The utility model relates to an angle mill field, specific theory relates to a holding down plate for angle mill.
Background
The grinding wheel or the cutting blade in the angle grinder belongs to a consumable product, needs to be replaced after being used for a period of time, and can also be replaced according to the requirements of different products. But after the upper pressing plate, the lower pressing plate, the grinding wheel and the grinding disc or the cutting disc rotate in the same direction for a long time, the friction force between the upper pressing plate, the lower pressing plate, the grinding wheel and the cutting disc is larger and larger, the locking phenomenon is easy to occur, the disassembly is difficult, and the disassembly can be realized only by using a special tool.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a holding down plate for angle mill can realize quick, simple dismantlement and fixed, can manually dismantle the holding down plate even.
The lower pressure plate for the angle grinder in the utility model comprises a connecting screw, a retainer ring, a middle sleeve, an axial retainer ring and a locking mechanism;
the locking mechanism is arranged in a wedge-shaped built-in space enclosed by the connecting screw, the check ring and the middle sleeve, the connecting screw comprises an internal thread connected with a spindle of the angle grinder, the connecting screw is axially and fixedly positioned with the check ring through the axial check ring, the middle sleeve is sleeved on the peripheries of the connecting screw and the check ring and is fixedly positioned by the locking mechanism in a locking manner, and the locking mechanism can lock or unlock the tight fit of the check ring and the grinding wheel or the cutting blade of the angle grinder while rotating the middle sleeve.
Preferably, the axial cross section of the connecting screw is T-shaped, the inner thread is arranged in the middle cylinder, the outer surface of one end of the cylinder is provided with an annular groove for clamping the axial retainer ring, and the periphery of the other end of the cylinder is provided with an inwards concave annular disc for fitting the locking mechanism.
Preferably, the locking mechanism comprises a positioning piece and a locking device, wherein the positioning piece is attached and positioned with the annular disc which is concave inwards in the connecting screw, and the locking device is clamped in the positioning piece and is uniformly distributed in an equiangular annular mode.
Preferably, the locking devices are arranged in three groups, are uniformly distributed in the positioning sheet in an equiangular annular manner, and each group of the locking devices comprises a pressure spring, a taper block and a cylindrical roller.
Preferably, the inner side wall surface of the middle sleeve is provided with a locking part matched with the locking device and a groove for the cylindrical roller to roll in, and the outer side surface of the middle sleeve is provided with insections.
Preferably, the taper block is an arc wedge block which can move in the wedge built-in space.
Preferably, one side surface of the retainer ring is a plane, the other side surface of the retainer ring is a second inclined surface, and a counter bore step abutted against the axial retainer ring is arranged in the middle of the retainer ring.
Use the utility model provides a lower pressure plate can realize quick, simple dismantlement and fixed, can manual dismantlement lower pressure plate even.
Drawings
Fig. 1 is a schematic view of the internal structure of the lower pressing plate of the present invention.
Fig. 2 is a schematic sectional structure view of the lower pressing plate of the present invention.
Fig. 3 is a schematic cross-sectional view of the middle joint screw of the present invention.
Fig. 4 is a schematic sectional view of the middle retainer ring of the present invention.
Fig. 5 is a schematic structural view of the middle positioning plate of the present invention.
Fig. 6 is a schematic cross-sectional view taken along line a-a of fig. 5.
Fig. 7 is a schematic perspective view of a middle taper block of the present invention
Fig. 8 is a schematic cross-sectional view of the middle taper block of the present invention.
Fig. 9 is a schematic perspective view of the taper block of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 and 2, the lower pressing plate for the medium angle grinder of the present invention includes a connecting screw 1, a retainer ring 3, a middle sleeve 4, an axial retainer ring 12 and a locking mechanism 7. The locking mechanism 7 is arranged in a wedge-shaped built-in space defined by the connecting screw 1, the check ring 3 and the middle sleeve 4, the connecting screw 1 can be in threaded connection with a main shaft of the angle grinder, the check ring 3 is in sleeved connection with the connecting screw 1, the check ring 3 can move axially along the connecting screw 1 after being sleeved in the connecting screw 1, the check ring 3 is clamped and limited by the axial check ring 12 after being sleeved in the connecting screw 1, and the check ring 3 is limited to be separated from the connecting screw 1. The middle sleeve 4 is sleeved on the peripheries of the connecting screw 1 and the retainer ring 3, extends into the connecting screw 1 and the retainer ring 3 to be combined with the locking mechanism 7, and is locked and fixed by the locking mechanism 7 to form a lower pressure plate. In the using process, the lower pressing plate is manually rotated, the retainer ring 3 can be gradually attached to the grinding wheel or the cutting blade after the upper pressing plate (not shown) is fixed, and the grinding wheel or the cutting blade of the angle grinder is locked. When the grinding wheel or the cutting blade needs to be opened or replaced after being used, the check ring 3 and the grinding wheel or the cutting blade are locked, the lower pressing plate can be unlocked to tightly lock the grinding wheel or the cutting blade only by manually rotating the middle sleeve 4 in the opposite direction through the locking mechanism 7.
The specific structure is as follows, and the specific number, size and angle related to the following structures are not limited thereto, and can be set according to specific requirements:
as shown in fig. 2 and 3, the connecting bolt 1 has a T-shaped cross section, and includes a column body 20 and a base 21 integrally formed of metal steel, wherein an internal thread 10 is inserted into the middle of the column body 20, and the main shaft of the angle grinder can be screwed through the internal thread 10. An annular groove 11 is formed in one end, far away from the base 21, of the cylinder 20 and used for clamping an axial retainer ring 12, and the axial retainer ring 12 is made of annular steel with an opening. A first annular step 14 is arranged on the outer side surface of a base 21, a concave annular disc 22 is formed inside the first annular step 14, a first inclined surface 24 with the gradient of 18 degrees is arranged on the inner bottom surface of the annular disc 22, and three groups of two counter bores 19 which are arranged in parallel (concentric circles) are arranged on the outer ring of the first inclined surface 24 at equal angles.
As shown in fig. 2 and 4, the retainer ring 3 is annular, is integrally formed of metal steel, and can be inserted into the cylinder 20 of the receiving bolt 1 and can move axially along the cylinder 20. One side surface of the retainer ring 3 is a plane 17 and is used for being attached to a grinding wheel or a cutting blade; the other side surface is a second inclined surface 18 with the gradient of 15 degrees, a second annular step 15 is arranged on the outer side surface of the retainer ring 3, and a counter bore step 16 which can be abutted with the axial retainer ring 12 is arranged in the middle of the retainer ring 3.
As shown in fig. 2 and 9, the middle sleeve 4 is integrally formed of metal steel and has a circular ring shape as a whole. A step 23 is formed on both side surfaces, and a locking portion 24 and a groove 27, which are lockingly connected to the locking mechanism 7, are formed in the middle of the steps 23 on both sides. After the middle sleeve 4 is assembled with the connecting screw 1 and the retainer ring 3, the steps 23 at the two sides are hermetically connected with the annular steps of the connecting screw 1 and the retainer ring 3 through the sealing rings 13. The outer side surface of the middle sleeve 4 is provided with insections 5, so that the friction force during manual operation can be increased.
As shown in fig. 1 and 2, the locking mechanism 7 includes a positioning piece 2 and three sets of locking devices. Three groups of locking devices are annularly distributed on the positioning sheet 2 at equal angles, and each group of locking devices comprises a pressure spring 6, a cylindrical ball 9 and a taper block 8. As shown in fig. 7 and 8, the taper block 8 is an arc wedge-shaped block, the inner arc surface 28 can be connected with the outer surface of the column 20 in an abutting manner, and the outer arc surface 29 is connected with the cylindrical ball 9 in a rolling manner. As shown in fig. 5 and 6, the positioning plate 2 is an annular thin plate formed by punching a steel strip, three groups of positioning structures corresponding to the locking device are annularly distributed on the annular thin plate, each group of positioning structures comprises a coil sheet 25 and a limiting sheet 31, wherein the coil sheet is formed by coiling the steel strip and used for clamping the ball 9 and the pressure spring 6, and two inserting sheets 26 can be inserted into the counter bore 19, and the inserting sheets 26 and the counter bore 19 which are distributed in a triangular shape are used for limiting the positioning plate 2. An inclined plane 30 for placing the taper block 8 is formed below the rolling sheet 25, the gradient of the inclined plane 30 is the same as that of the wedge-shaped surface of the taper block 8, and the reverse side surface of the inclined plane 30 is attached to the first inclined surface 24 in the screw receiving 1.
As shown in fig. 1 and 2, in a normal state, the lower pressing plate is in a locked state, specifically, the positioning plate 2 and the middle sleeve 4 are positioned by the aid of the pressure spring 6, the middle sleeve 4 is prevented from rotating, the ball 9 is forced to abut against the taper block 8, the taper block 8 is tightly attached to the surface of the cylinder 20, and simultaneously, wedge surfaces on two sides of the taper block 8 are tightly attached to the inclined surface 30 of the positioning plate 2 and the second inclined surface 18 of the retainer ring 3. When the grinding wheel or the cutting blade is installed, the lower pressing plate is rotated to enable the retainer ring 3 to be gradually attached to the grinding wheel or the cutting blade, and the grinding wheel or the cutting blade of the angle grinder is locked. When the grinding wheel or the cutting blade needs to be opened or replaced after use, the retainer ring 3 and the grinding wheel or the cutting blade are in a locking state, the middle sleeve 4 only needs to be manually rotated in the opposite direction, the ball 9 and the positioning blade 2 are driven to rotate, the ball 9 is forced to enter the groove 27 on the side edge of the locking part 24, the ball 9 is released to abut against the taper block 8, the taper block 8 retreats away from the cylinder 20, the positioning blade 2 and the retainer ring 3 are attached, the retainer ring 3 has no force, the retainer ring 3 can axially move along the cylinder 20, and therefore the locking of the retainer ring 3 and the grinding wheel can be released, and the purpose of quick, simple and convenient disassembly is achieved.
Claims (7)
1. The lower pressing plate for the angle grinder is characterized by comprising a connecting screw, a check ring, a middle sleeve, an axial check ring and a locking mechanism;
the locking mechanism is arranged in a wedge-shaped built-in space enclosed by the connecting screw, the check ring and the middle sleeve, the connecting screw comprises an internal thread connected with a spindle of the angle grinder, the connecting screw is axially and fixedly positioned with the check ring through the axial check ring, the middle sleeve is sleeved on the peripheries of the connecting screw and the check ring and is fixedly positioned by the locking mechanism in a locking manner, and the locking mechanism can lock or unlock the tight fit of the check ring and the grinding wheel or the cutting blade of the angle grinder while rotating the middle sleeve.
2. The lower platen for the angle grinder of claim 1, wherein the axial cross section of the connecting screw is T-shaped, the internal thread is arranged in a middle cylinder, an annular groove for clamping the axial retainer ring is formed in the outer surface of one end of the cylinder, and an inward-concave annular disc is arranged on the periphery of the other end of the cylinder and used for being attached to the locking mechanism.
3. The lower platen for an angle grinder as claimed in claim 2, wherein the locking mechanism comprises a positioning plate for positioning in contact with the annular disc recessed in the connecting screw, and locking devices which are clamped in the positioning plate and are uniformly distributed in an equiangular annular manner.
4. The lower platen for an angle grinder as set forth in claim 3, wherein the locking means has three sets of locking members annularly and uniformly arranged in the positioning plate at equal angles, each set of locking member including a compression spring, a taper block and a cylindrical roller.
5. The lower platen for an angle grinder as set forth in claim 4, wherein the inner sidewall surface of the middle sleeve is provided with a locking portion engaged with the locking device and a groove into which the cylindrical roller rolls, and the outer sidewall surface of the middle sleeve is provided with insections.
6. The lower platen for an angle grinder as set forth in claim 4, wherein the taper block is an arc-shaped wedge block movable in the wedge-shaped built-in space.
7. The lower pressure plate for the angle grinder as claimed in claim 1, wherein one side surface of the retainer ring is a plane, the other side surface is a second inclined surface, and a counter bore step abutting against the axial retainer ring is arranged in the middle of the retainer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183743.7U CN214186605U (en) | 2020-12-25 | 2020-12-25 | Lower pressing plate for angle grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183743.7U CN214186605U (en) | 2020-12-25 | 2020-12-25 | Lower pressing plate for angle grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214186605U true CN214186605U (en) | 2021-09-14 |
Family
ID=77656948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023183743.7U Active CN214186605U (en) | 2020-12-25 | 2020-12-25 | Lower pressing plate for angle grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214186605U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227476A (en) * | 2021-12-24 | 2022-03-25 | 永康市开源动力工具有限公司 | Gasket structure for preventing external pressing plate from being locked more and more for angle grinder |
| CN114770314A (en) * | 2022-01-20 | 2022-07-22 | 麦太保电动工具(中国)有限公司 | Structure for integrating rotating shaft and flange pressing plate and angle grinder using structure |
-
2020
- 2020-12-25 CN CN202023183743.7U patent/CN214186605U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227476A (en) * | 2021-12-24 | 2022-03-25 | 永康市开源动力工具有限公司 | Gasket structure for preventing external pressing plate from being locked more and more for angle grinder |
| CN114227476B (en) * | 2021-12-24 | 2023-02-03 | 永康市开源动力工具有限公司 | Gasket structure for preventing external pressing plate from being locked more and more for angle grinder |
| CN114770314A (en) * | 2022-01-20 | 2022-07-22 | 麦太保电动工具(中国)有限公司 | Structure for integrating rotating shaft and flange pressing plate and angle grinder using structure |
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