CN111890223A - Quick installation mechanism of bistrique on sand mill - Google Patents
Quick installation mechanism of bistrique on sand mill Download PDFInfo
- Publication number
- CN111890223A CN111890223A CN202010672943.4A CN202010672943A CN111890223A CN 111890223 A CN111890223 A CN 111890223A CN 202010672943 A CN202010672943 A CN 202010672943A CN 111890223 A CN111890223 A CN 111890223A
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- hole
- steel ball
- groove
- lock
- key
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a quick mounting mechanism for an upper grinding head of a sand mill, which comprises: the outer side wall of the driving shaft is provided with a key groove, and the driving shaft is internally provided with a lock hole; the inner side wall of the mounting sleeve is provided with a convex key, when the mounting sleeve is sleeved on the driving shaft, the convex key can be inserted into the key groove, the lock rod is inserted into the lock hole, the side wall of the driving shaft is provided with a through hole, the through hole is positioned on the bottom of the key groove, a steel ball is arranged in the through hole in a penetrating manner, the side wall of the lock rod is provided with an accommodating groove, and a compression spring is arranged between the lock rod and the bottom of the lock; the convex key on the mounting sleeve is provided with a pressing inclined plane and a locking groove. The quick mounting mechanism can unlock and disassemble the mounting sleeve only by pressing the lock rod inwards, so that an old grinding head can be taken down conveniently and quickly; when a new grinding head is installed, the installation sleeve is directly sleeved on the driving shaft until the steel ball is clamped into the locking groove, and the installation can be finished.
Description
Technical Field
The invention relates to the field of sand mills, in particular to a quick mounting mechanism for an upper grinding head of a sand mill.
Background
A hand held sander is a power tool used for sanding and polishing. The hand-held type sand mill comprises motor body unit and bistrique, and the bistrique kind has hundred impeller bistriques, is equipped with the emery roll of emery circle etc. is provided with a drive shaft on the output of motor body unit, and the drive shaft is rotatory by the motor drive in the motor body unit, and the bistrique is installed in the drive shaft for motor body unit can drive the bistrique rotatory, thereby can polish and polish through the bistrique. The grinding heads need to be replaced frequently when they are worn or in order to achieve different machining requirements. The structure of the mounting mechanism of the upper grinding head of the existing sand mill comprises: the outer side wall of the driving shaft is provided with a key groove which is arranged along the length direction of the driving shaft, the outer side of the key groove is opened, and the axial outer end face of the driving shaft is provided with a threaded lock hole; be provided with the convex key on the inside wall of installation cover, when the installation cover suit was in the drive shaft, the convex key can be in outside-in inserted to the keyway for the drive shaft can be through the convex key area installation cover and bistrique rotatory together, and the bolt that can pass through in screw thread lockhole after the installation cover suit was in the drive shaft locks on the drive shaft. The installation sleeve is too troublesome to install through the bolt locking, the bolt is required to be screwed down to take down the old grinding head when the grinding head is replaced every time, and then the bolt is screwed in again after the new grinding head is replaced. In addition, a screwdriver is required to rotate the bolt, so that the grinding head cannot be replaced without the screwdriver.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the quick mounting mechanism of the upper grinding head of the sand mill, which can conveniently and quickly replace the grinding head, is provided.
In order to solve the problems, the technical scheme adopted by the invention is as follows: a quick mounting mechanism for an upper grinding head of a sand mill comprises: the outer side wall of the driving shaft is provided with a key groove which is arranged along the axial direction of the driving shaft, the outer side of the key groove is opened, the driving shaft is internally provided with a lock hole along the axial direction, and the lock hole penetrates through the outer end face of the driving shaft in the axial direction outwards to form a blind hole; during the installation cover wears to establish and is fixed in the bistrique, is provided with the protruding key on the inside wall of installation cover, when installation cover suit was in the drive shaft, protruding key ability outside-in inserted to the keyway for the drive shaft can be through the protruding key area installation cover and bistrique rotatory together, its characterized in that: a lock rod with the outer end extending out of the lock hole is inserted into the lock hole in the driving shaft, a through hole is formed in the side wall of the driving shaft on one side of the lock hole, the through hole is located at the bottom of the key groove, a steel ball is movably arranged in the through hole in a penetrating mode, the steel ball can extend into the key groove through the through hole but cannot integrally penetrate through the through hole to enter the key groove, an accommodating groove capable of allowing the steel ball to enter is formed in the side wall of the lock rod, the inner side wall of the accommodating groove is obliquely arranged, so that the inner side wall of the accommodating groove can press the steel ball to the key groove when the lock rod moves outwards, a compression spring capable of pushing the lock rod outwards is arranged between the lock rod and the bottom of the lock hole; the convex key on the mounting sleeve is provided with a pressing inclined surface and a locking groove positioned on the outer side of the pressing inclined surface, the steel ball can be gradually pressed back into the through hole by pressing the inclined surface in the process that the convex key is inserted into the key groove, so that the mounting sleeve can be smoothly sleeved on the driving shaft, and the steel ball can pass through the inner side wall of the accommodating groove in the process that the steel ball is pressed back into the through hole, so that the locking rod can move inwards by overcoming the elasticity of the compression spring; after the convex key is inserted into the key groove, the pressing inclined plane can cross over the steel ball, and the lock groove can move to a position opposite to the steel ball, at the moment, the lock rod can move outwards under the action of the compression spring, the inner side wall of the accommodating groove can support and press the steel ball, so that the steel ball protrudes out of the through hole and is reset and inserted into the lock groove, the steel ball inserted into the lock groove can prevent the mounting sleeve from being separated from the driving shaft outwards through supporting and leaning against the inner side wall of the lock groove, and the mounting sleeve and the grinding head can be locked on the driving shaft; overcome compression spring elasticity through external force and enable the steel ball not receive the support of holding tank inboard lateral wall after inwards pressing the locking lever and press for the steel ball can get into in the holding tank and retract the via hole, just so can't prevent the installation cover outwards to break away from the drive shaft, thereby can carry out the unblock through inwards pressing the locking lever and dismantle the installation cover.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: the locking rod on one side of the accommodating groove is provided with an avoiding notch communicated with the accommodating groove, the steel ball can be avoided through the avoiding notch when the locking rod is inserted into the lock hole, and the steel ball can enter the accommodating groove by rotating the locking rod after the locking rod is inserted into the lock hole.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: the side wall of the driving shaft is provided with a ball-mounting hole through which the steel ball can pass and enter the lock hole.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: the bead filling holes and the through holes are oppositely arranged.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: four key grooves are uniformly formed in the outer side wall of the driving shaft, four convex keys are uniformly arranged on the inner side wall of the mounting sleeve, and the four convex keys and the four key grooves are in one-to-one correspondence respectively.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: wear to be equipped with a detachable spacer pin on the locking lever, be provided with a rectangular shape groove along the drive shaft axial arrangement on the drive shaft lateral wall of spacer pin both ends department respectively, the spacer pin both ends insert respectively to the rectangular shape groove of corresponding side for two rectangular shape grooves can lead and spacing through the inside and outside removal of spacer pin to the locking lever.
Further, aforementioned quick installation mechanism of bistrique on sand mill, wherein: the holding tank is a V-shaped groove.
The invention has the advantages that: the quick mounting mechanism of the upper grinding head of the sand mill can unlock and disassemble the mounting sleeve only by pressing the lock rod inwards, so that the old grinding head can be taken down conveniently and quickly; when a new grinding head is installed, the installation sleeve is directly sleeved on the driving shaft until the steel balls are clamped into the lock grooves on the installation sleeve, and then the installation of the new grinding head can be completed; thus, the grinding head can be conveniently and quickly replaced.
Drawings
Fig. 1 is an assembly state diagram of a quick mounting mechanism of an upper grinding head of a sand mill.
Fig. 2 is a right-view structural diagram of fig. 1.
FIG. 3 is a schematic sectional view of the structure at A-A in FIG. 2.
FIG. 4 is a schematic structural view of a section B-B in FIG. 2.
Fig. 5 is a schematic view of the driving shaft of fig. 3.
Fig. 6 is a schematic structural view of the mounting sleeve of fig. 3.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and the attached drawings.
As shown in fig. 1, 2, 3, 4, 5 and 6, a quick mounting mechanism for an upper grinding head of a sand mill comprises: the outer side wall of the driving shaft 1 is uniformly provided with four key slots 11 which are arranged along the axial direction of the driving shaft 1, the outer side of each key slot 11 is opened, a lock hole 12 is arranged in the driving shaft 1 along the axial direction, and the lock hole 12 outwards penetrates through the outer end face of the driving shaft 1 in the axial direction to form a blind hole; the mounting sleeve 2 is fixedly arranged on the center of the grinding heads 8 in a penetrating manner, in actual production, each grinding head 8 is fixedly provided with one mounting sleeve 2 in advance, and the old grinding head 8 can be replaced together with the mounting sleeve 2 thereon after being replaced; the inner side wall of the mounting sleeve 2 is uniformly provided with four convex keys 21, the four convex keys 21 and the four key slots 11 are respectively in one-to-one correspondence, when the mounting sleeve 2 is sleeved on the driving shaft 1, the outer sides of the key slots 11 are arranged in an open manner, so that the convex keys 21 can be respectively inserted into the corresponding key slots 11 from outside to inside, the driving shaft 1 can drive the mounting sleeve 2 and the grinding head 8 to rotate together through the convex keys 21, a locking rod 3 with the outer end extending out of the locking hole 12 is inserted into a locking hole 12 on the driving shaft 1, the side wall of the driving shaft 1 on one side of the locking hole 12 is provided with a through hole 13, the through hole 13 is positioned on the bottom of one key slot 11, a steel ball 14 is movably penetrated in the through hole 13, the steel ball 14 can extend into the key slot 11 through the through hole 13 but cannot integrally pass through the through hole 13 and enter the key, the inner side wall of the accommodating groove 31 is obliquely arranged, so that when the locking rod 3 moves outwards, the inner side wall of the accommodating groove 31 can press against the steel ball 14 to press the steel ball 14 to the key groove 11, in the embodiment, the accommodating groove 31 is a V-shaped groove; a compression spring 15 capable of pushing the lock rod 3 outwards is arranged between the lock rod 3 and the bottom of the lock hole 12, and the lock rod 3 can press the steel ball 14 into the key groove 11 and abut against the via hole 13 through the inner side wall of the accommodating groove 31 under the pushing action of the compression spring 15; the convex key 21 on the mounting sleeve 2 is provided with a pressing inclined surface 22 and a locking groove 23 positioned on the outer side of the pressing inclined surface 22, the pressing inclined surface 22 can gradually press the steel ball 14 back into the through hole 13 in the process that the convex key 21 is inserted into the key groove 11, so that the mounting sleeve 2 can be smoothly sleeved on the driving shaft 1, and the steel ball 14 can enable the locking rod 3 to move inwards by overcoming the elasticity of the compression spring 15 through the inner side wall of the accommodating groove 31 in the process that the steel ball 14 is pressed back into the through hole 13; after the convex key 21 is inserted into the key groove 11, the pressing inclined surface 22 will cross over the steel ball 14, and the lock groove 23 will move to the position opposite to the steel ball 14, at this time, the lock rod 3 will move outward under the action of the compression spring 15, the inner side wall of the accommodating groove 31 will press against the steel ball 14, so that the steel ball 14 protrudes out of the through hole 13 and is reset to be inserted into the lock groove 23, the steel ball 14 inserted into the lock groove 23 can abut against the inner side wall of the lock groove 23 to prevent the mounting sleeve 2 from separating from the driving shaft 1, thereby locking the mounting sleeve 2 and the grinding head 8 on the driving shaft 1; after the locking rod 3 is pressed inwards by external force overcoming the elasticity of the compression spring 15, the steel ball 14 is prevented from being propped against the inner side wall of the accommodating groove 31, so that the steel ball 14 can enter the accommodating groove 31 and retract into the through hole 13, the installation sleeve 2 cannot be prevented from being separated from the driving shaft 1 outwards, and the installation sleeve 2 can be unlocked and disassembled by pressing the locking rod 3 inwards.
In this embodiment, a ball-loading hole 5 through which the steel ball 14 can pass into the lock hole 12 is provided on the side wall of the drive shaft 1. The beading hole 5 and the via hole 13 are oppositely arranged. The ball mounting hole 5 is provided to facilitate mounting of the steel ball 14.
In addition, wear to be equipped with a detachable spacer pin 6 on locking lever 3, be provided with a rectangular shape groove 7 along 1 axial arrangement of drive shaft on the 1 lateral wall of drive shaft at 6 both ends departments of spacer pin respectively, during 6 both ends of spacer pin inserted the rectangular shape groove 7 to corresponding side respectively for two rectangular shape grooves 7 can lead and spacing through 6 inside and outside removals of spacer pin to locking lever 3.
An avoiding notch 4 communicated with the accommodating groove 31 is formed in the lock rod 3 on one side of the accommodating groove 31, the steel ball 14 can be avoided through the avoiding notch 4 when the lock rod 3 is inserted into the lock hole 12, and the steel ball 14 can enter the accommodating groove 31 by rotating the lock rod 3 after the lock rod 3 is inserted into the lock hole 12.
The assembling process of each component on the driving shaft 1 in the quick mounting mechanism is as follows: (1) the compression spring 15 is put into the locking hole 12; (2) loading the steel ball 14 into the lock hole 12 from the ball loading hole 5, and dropping the steel ball 14 into the through hole 13; (3) the lock rod 3 is inserted into the lock hole 12 to press the compression spring 15, and when the lock rod is inserted, the steel ball 14 is avoided through the avoiding notch 4; (4) after the lock rod 3 is inserted into the lock hole 12, the steel balls 14 enter the accommodating groove 31 by rotating the lock rod 3; (5) the limiting pin 6 is tightly penetrated through the lock rod 3 through the two strip-shaped grooves 7.
Claims (7)
1. A quick mounting mechanism for an upper grinding head of a sand mill comprises: the outer side wall of the driving shaft is provided with a key groove which is arranged along the axial direction of the driving shaft, the outer side of the key groove is opened, the driving shaft is internally provided with a lock hole along the axial direction, and the lock hole penetrates through the outer end face of the driving shaft in the axial direction outwards to form a blind hole; during the installation cover wears to establish and is fixed in the bistrique, is provided with the protruding key on the inside wall of installation cover, when installation cover suit was in the drive shaft, protruding key ability outside-in inserted to the keyway for the drive shaft can be through the protruding key area installation cover and bistrique rotatory together, its characterized in that: a lock rod with the outer end extending out of the lock hole is inserted into the lock hole in the driving shaft, a through hole is formed in the side wall of the driving shaft on one side of the lock hole, the through hole is located at the bottom of the key groove, a steel ball is movably arranged in the through hole in a penetrating mode, the steel ball can extend into the key groove through the through hole but cannot integrally penetrate through the through hole to enter the key groove, an accommodating groove capable of allowing the steel ball to enter is formed in the side wall of the lock rod, the inner side wall of the accommodating groove is obliquely arranged, so that the inner side wall of the accommodating groove can press the steel ball to the key groove when the lock rod moves outwards, a compression spring capable of pushing the lock rod outwards is arranged between the lock rod and the bottom of the lock hole; the convex key on the mounting sleeve is provided with a pressing inclined surface and a locking groove positioned on the outer side of the pressing inclined surface, the steel ball can be gradually pressed back into the through hole by pressing the inclined surface in the process that the convex key is inserted into the key groove, so that the mounting sleeve can be smoothly sleeved on the driving shaft, and the steel ball can pass through the inner side wall of the accommodating groove in the process that the steel ball is pressed back into the through hole, so that the locking rod can move inwards by overcoming the elasticity of the compression spring; after the convex key is inserted into the key groove, the pressing inclined plane can cross over the steel ball, and the lock groove can move to a position opposite to the steel ball, at the moment, the lock rod can move outwards under the action of the compression spring, the inner side wall of the accommodating groove can support and press the steel ball, so that the steel ball protrudes out of the through hole and is reset and inserted into the lock groove, the steel ball inserted into the lock groove can prevent the mounting sleeve from being separated from the driving shaft outwards through supporting and leaning against the inner side wall of the lock groove, and the mounting sleeve and the grinding head can be locked on the driving shaft; overcome compression spring elasticity through external force and enable the steel ball not receive the support of holding tank inboard lateral wall after inwards pressing the locking lever and press for the steel ball can get into in the holding tank and retract the via hole, just so can't prevent the installation cover outwards to break away from the drive shaft, thereby can carry out the unblock through inwards pressing the locking lever and dismantle the installation cover.
2. The quick mounting mechanism for the upper grinding head of the sand mill as claimed in claim 1, wherein: the locking rod on one side of the accommodating groove is provided with an avoiding notch communicated with the accommodating groove, the steel ball can be avoided through the avoiding notch when the locking rod is inserted into the lock hole, and the steel ball can enter the accommodating groove by rotating the locking rod after the locking rod is inserted into the lock hole.
3. The quick mounting mechanism of the upper grinding head of the sand mill as claimed in claim 1 or 2, wherein: the side wall of the driving shaft is provided with a ball-mounting hole through which the steel ball can pass and enter the lock hole.
4. The quick mounting mechanism for the upper grinding head of the sand mill as claimed in claim 3, wherein: the bead filling holes and the through holes are oppositely arranged.
5. The quick mounting mechanism of the upper grinding head of the sand mill as claimed in claim 1 or 2, wherein: four key grooves are uniformly formed in the outer side wall of the driving shaft, four convex keys are uniformly arranged on the inner side wall of the mounting sleeve, and the four convex keys and the four key grooves are in one-to-one correspondence respectively.
6. The quick mounting mechanism of the upper grinding head of the sand mill as claimed in claim 1 or 2, wherein: wear to be equipped with a detachable spacer pin on the locking lever, be provided with a rectangular shape groove along the drive shaft axial arrangement on the drive shaft lateral wall of spacer pin both ends department respectively, the spacer pin both ends insert respectively to the rectangular shape groove of corresponding side for two rectangular shape grooves can lead and spacing through the inside and outside removal of spacer pin to the locking lever.
7. The quick mounting mechanism of the upper grinding head of the sand mill as claimed in claim 1 or 2, wherein: the holding tank is a V-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672943.4A CN111890223A (en) | 2020-07-14 | 2020-07-14 | Quick installation mechanism of bistrique on sand mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672943.4A CN111890223A (en) | 2020-07-14 | 2020-07-14 | Quick installation mechanism of bistrique on sand mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111890223A true CN111890223A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010672943.4A Pending CN111890223A (en) | 2020-07-14 | 2020-07-14 | Quick installation mechanism of bistrique on sand mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111890223A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115229630A (en) * | 2022-06-30 | 2022-10-25 | 徐州柏通铝业有限公司 | Aluminum alloy casting blank chip milling device |
| CN115342117B (en) * | 2022-08-16 | 2024-02-06 | 杭州鑫凯传动机械有限公司 | Universal joint cross shaft |
-
2020
- 2020-07-14 CN CN202010672943.4A patent/CN111890223A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115229630A (en) * | 2022-06-30 | 2022-10-25 | 徐州柏通铝业有限公司 | Aluminum alloy casting blank chip milling device |
| CN115229630B (en) * | 2022-06-30 | 2023-11-14 | 徐州柏通铝业有限公司 | Aluminum alloy casting blank chip milling device |
| CN115342117B (en) * | 2022-08-16 | 2024-02-06 | 杭州鑫凯传动机械有限公司 | Universal joint cross shaft |
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