CN217291665U - Speed reduction assembly of sander bottom plate - Google Patents
Speed reduction assembly of sander bottom plate Download PDFInfo
- Publication number
- CN217291665U CN217291665U CN202220934177.9U CN202220934177U CN217291665U CN 217291665 U CN217291665 U CN 217291665U CN 202220934177 U CN202220934177 U CN 202220934177U CN 217291665 U CN217291665 U CN 217291665U
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- Prior art keywords
- connecting seat
- fan blade
- speed reduction
- sander
- bottom plate
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Abstract
The utility model discloses a speed reduction subassembly of grinder bottom plate, including drive shaft, fan blade and bottom plate, fan blade interference fit sets up in the drive shaft, and the bottom plate rotates and sets up in the drive shaft, and its main points are: the bottom plate is fixedly arranged on the connecting seat, the connecting seat is rotatably arranged on the driving shaft through a bearing, the speed reduction arm comprises a friction block, the friction block of the speed reduction arm is elastically arranged in the fan blade, and the friction block is in contact with the periphery of the connecting seat.
Description
Technical Field
The utility model relates to an electric tool technical field specifically is a speed reduction subassembly of grinder bottom plate.
Background
At present, the sander is widely applied to sanding of wall surfaces or ground surfaces. When the sander works, the motor drives the bottom plate to polish the surface to be polished, so that the surface to be polished is smooth and flat. To produce the oscillation, the base plate is usually mounted on an eccentric. When the computer is shut down, the bottom plate can continuously run for a while under the action of inertia, so that articles are easily damaged or personal injuries are easily caused, and the bottom plate is required to be stopped as soon as possible. Most of the existing sanding machines are provided with a speed reducing mechanism, fig. 1 shows the speed reducing mechanism in the prior art, the speed reducing mechanism is that ribs 100-1 are arranged on the bottom surface of a protective cover 100, the bottom plate stops moving as soon as possible through friction between the ribs and the bottom plate, but the speed reducing mechanism is always in a mutual contact friction state when the bottom plate is normally used, the friction resistance increases the energy consumption during working, the cruising ability of the equipment is reduced, and after a period of friction, the ribs are abraded, the friction resistance is greatly reduced, and therefore the speed reducing effect is lost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure is favorable to the speed reduction subassembly of the grinder bottom plate of improve equipment continuation of the journey.
Realize the utility model discloses the basic technical scheme of purpose is: the utility model provides a speed reduction assembly of grinder bottom plate, includes drive shaft, fan blade and bottom plate, fan blade interference fit sets up in the drive shaft, and the bottom plate rotates and sets up in the drive shaft, and its structural feature is: the bottom plate is fixedly arranged on the connecting seat, the connecting seat is rotatably arranged on the driving shaft through a bearing, the speed reduction arm comprises a friction block, the friction block of the speed reduction arm is elastically arranged in the fan blade, and the friction block is in contact with the periphery of the connecting seat. The friction block is elastically arranged on the mounting block through the elastic arm, and the mounting block is fixedly arranged in the fan blade.
Furthermore, in order to facilitate installation, the fan blade is provided with an installation column, an installation block is fixedly arranged on the installation column, and the installation block is fixedly arranged on the installation column.
Further, in order to shorten the deceleration time, two or three deceleration arms are provided, and each deceleration arm is arranged in the wind blade along the circumferential direction at equal intervals.
Furthermore, in order to improve the use reliability, the fan blade is provided with a dust removal hole, and the position of the dust removal hole corresponds to the position of the friction block.
The deflection sleeve is arranged on the driving shaft in a transmission mode, an inner ring of the bearing is in interference fit with the deflection sleeve, an outer ring of the bearing is in interference fit with the connecting seat, and the counterweight block is arranged on the driving shaft in a transmission mode.
The utility model discloses following beneficial effect has: (1) the utility model discloses a speed reduction subassembly of grinder bottom plate simple structure, simple to operate. Utilize the centrifugal force principle for the grinder does not receive the frictional resistance of speed reduction subassembly when normal work, thereby is favorable to improving equipment's duration, reduces the wearing and tearing to the clutch blocks simultaneously, promotes speed reduction subassembly's life.
(2) When adopting the utility model discloses a when grinder shut down, the periphery that the clutch blocks is close to the friction portion of connecting seat and connecting seat under the effect of the restoring force of elastic arm contacts to produce frictional force and make the quick stall of connecting seat, and then make the bottom plate stall end.
(3) The utility model discloses a speed reduction subassembly of grinder bottom plate is equipped with the protection casing, can reduce the part of operator and bottom plate contact, improves the safety in utilization.
(4) Sander can produce a large amount of dust at the during operation, the utility model discloses a be equipped with the dust removal hole on sander bottom plate's the speed reduction subassembly's the fan blade, can avoid the downside deposition of fan blade, lead to the clutch blocks can't keep away from the connecting seat, use the reliability to promote greatly.
(5) The utility model discloses a speed reduction subassembly of grinder bottom plate is equipped with a plurality of independent speed reduction arms, and after damaging respectively, all the other can also normal work, uses reliability and security further to improve.
Drawings
Fig. 1 is a schematic structural diagram of a protective cover of a speed reducing mechanism of a sanding machine in the prior art.
Fig. 2 is a schematic structural view of the speed reduction assembly of the sander base plate of the present invention.
Fig. 3 is a schematic view when viewed from the left front lower side of fig. 2.
Fig. 4 is an exploded view when viewed from the right front lower side of fig. 2.
Fig. 5 is an exploded view as viewed from the upper right front of fig. 2.
Fig. 6 is a schematic sectional view a-a in fig. 2.
Fig. 7 is a schematic structural view of the decelerating arm.
The reference numbers in the drawings are:
the drive shaft (1) is driven,
the fan blade 2, the mounting column 21, the dust removing hole 22,
the bottom plate 3 is provided with a plurality of grooves,
the deceleration arm 4, the friction block 41, the mounting block 42, the square hole 42-1, the elastic arm 43,
connecting seat 5, eccentric cover 6, bearing 7, balancing weight 8, end cover 9, protection casing 10.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings. The description of the orientation of the utility model is performed according to the orientation shown in fig. 2, that is, the up-down left-right direction shown in fig. 2 is the up-down left-right direction of the description, the party towards which fig. 2 is located is the front, and the party departing from fig. 2 is the rear.
(example 1)
See fig. 2 to 7, the utility model discloses a speed reduction assembly of grinder bottom plate includes drive shaft 1, fan blade 2, bottom plate 3, speed reduction arm 4 and connecting seat 5, eccentric bushing 6, bearing 7, balancing weight 8, end cover 9 and protection casing 10.
Referring to fig. 2 to 6, the fan blade 2 is arranged on the driving shaft 1 in an interference fit manner. The fan blade 2 is provided with mounting columns 21, the number of the mounting columns 21 is the same as that of the speed reduction arms 4, the number of the mounting columns is 2, the mounting columns 21 are arranged in the lower side of the fan blade 2 at equal intervals in the circumferential direction, and the mounting columns 21 are regular quadrangular prisms protruding downwards in the axial direction.
Referring to fig. 2 to 7, there are two or three speed reduction arms 4, and in this embodiment, there are two speed reduction arms 4, and each speed reduction arm 4 is disposed in the fan blade 2 at equal angles along the circumferential direction. The reduction arm 4 is in one piece, in this embodiment an injection moulded one piece. The decelerating arm 4 includes a friction block 41, a mounting block 42, and a resilient arm 43. The mounting block 42 is provided with a square hole 42-1 corresponding to the mounting column 21, and the mounting block 42 is sleeved on the mounting column 21. There are 2 elastic arms 43, and 2 elastic arms 43 all are circular arc plate-shaped, and 2 elastic arms 43 set up concentrically. The friction block 41 is elastically mounted on the mounting block 42 by means of elastic arms 43. The fan blade 2 is provided with a dust removal hole 22, and the position of the dust removal hole 22 corresponds to the position of the friction block 41.
Referring to fig. 2 to 6, the connecting socket 5 is provided with a friction portion 51 and a connecting portion 52 in sequence from top to bottom. The deviation sleeve 6 is arranged on the driving shaft 1 in a transmission manner and is positioned in the lower side of the fan blade 2. The inner ring of the bearing 7 is in interference fit with the eccentric sleeve 6, the outer ring of the bearing 7 is in interference fit with the friction part 51 of the connecting seat 5, and the bearing 7 is positioned in the friction part 51. When the apparatus is not operating, the friction block 41 abuts against the outer periphery of the friction portion 51. The balancing weight 8 is arranged on the driving shaft 1 in a transmission way. The end cover 9 is arranged on the lower part of the connecting part 52 of the connecting seat 5, covers the eccentric sleeve 6, the bearing 7 and the balancing weight 8 from the lower part and has a dustproof function. The bottom plate 3 is fixedly connected to the connecting part 52 of the connecting base 5, and the end cap 9 is clamped and fixed on the connecting part 52. The protective hood 10 is fixedly arranged on the housing of the sander and covers the base plate 3 from above.
The utility model discloses a speed reduction unit during operation of grinder bottom plate: when the sander starts to work and operate, the fan blade 2 rotates to generate centrifugal force, and overcomes the restoring force of the elastic arm 42 to enable the friction block 41 to be far away from the friction part 51 of the connecting seat 5 in the radial direction and not to be contacted with each other; when the sander is shut down, the rotating speed of the fan blade 2 is reduced, the friction block 41 is close to the connecting seat 5 under the action of the restoring force of the elastic arm 42 and contacts with the periphery of the friction part 51 of the connecting seat 5, so that friction force is generated to stop the connecting seat 5 from rotating, and further the bottom plate 3 stops rotating.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A speed reduction assembly of a sander base plate comprises a driving shaft (1), fan blades (2) and a base plate (3); fan blade (2) interference fit sets up on drive shaft (1), and bottom plate (3) rotate to set up on drive shaft (1), its characterized in that: the device also comprises a speed reducing arm (4) and a connecting seat (5); the bottom plate (3) is fixedly arranged on the connecting seat (5), and the connecting seat (5) is rotatably arranged on the driving shaft (1) through a bearing (7); the speed reducing arm (4) comprises a friction block (41), the friction block (41) of the speed reducing arm (4) is elastically arranged in the fan blade (2), and the friction block (41) is in contact with the periphery of the connecting seat (5); when the sander works, the fan blade (2) rotates to generate centrifugal force to enable the friction block (41) to be radially far away from the connecting seat (5), after the sander is shut down, the rotating speed of the fan blade (2) is reduced, the friction block (41) is close to the periphery of the connecting seat (5) and contacts with the periphery of the connecting seat (5) under the action of restoring force, and therefore friction force is generated to enable the connecting seat (5) to stop rotating.
2. The sander base plate speed reduction assembly of claim 1, wherein: the decelerating arm (4) further comprises a mounting block (42) and an elastic arm (43); the friction block (41) is elastically arranged on the mounting block (42) through an elastic arm (43), and the mounting block (42) is fixedly arranged in the fan blade (2).
3. The sander floor speed reduction assembly of claim 2, wherein: the fan blade (2) is provided with a mounting column (21), a mounting block (42) is fixedly arranged on the mounting column (21), and the mounting block (42) is fixedly arranged on the mounting column (21).
4. The sander floor speed reduction assembly of claim 1, wherein: the number of the speed reducing arms (4) is two or three, and the speed reducing arms (4) are arranged in the fan blade (2) at equal intervals and angles along the circumferential direction.
5. The sander floor speed reduction assembly of claim 1, wherein: the fan blade (2) is provided with a dust removal hole (22), and the position of the dust removal hole (22) corresponds to the position of the friction block (41).
6. The sander floor speed reduction assembly of claim 1, wherein: also comprises a deviation sleeve (6) and a balancing weight (8); the deviation sleeve (6) is arranged on the driving shaft (1) in a transmission mode, the inner ring of the bearing (7) is in interference fit with the deviation sleeve (6), and the outer ring of the bearing (7) is in interference fit with the connecting seat (5); the balancing weight (8) is arranged on the driving shaft (1) in a transmission way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220934177.9U CN217291665U (en) | 2022-04-21 | 2022-04-21 | Speed reduction assembly of sander bottom plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220934177.9U CN217291665U (en) | 2022-04-21 | 2022-04-21 | Speed reduction assembly of sander bottom plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217291665U true CN217291665U (en) | 2022-08-26 |
Family
ID=82913718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220934177.9U Active CN217291665U (en) | 2022-04-21 | 2022-04-21 | Speed reduction assembly of sander bottom plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217291665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4450224A1 (en) * | 2023-04-17 | 2024-10-23 | X'Pole Precision Tools Inc. | Random orbital sanding tool |
-
2022
- 2022-04-21 CN CN202220934177.9U patent/CN217291665U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4450224A1 (en) * | 2023-04-17 | 2024-10-23 | X'Pole Precision Tools Inc. | Random orbital sanding tool |
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