CN116587157A - Grinding tool machine - Google Patents

Abstract

The utility model provides a grinding machine tool, includes a shell, a drive assembly, a grinding plate, a switch and a clamp plate, this drive assembly locates this shell, and this grinding plate is driven by this drive assembly, and this grinding plate has a grinding surface and a non-grinding surface, and this switch is used for driving this drive assembly, and this clamp plate locates this shell, and this clamp plate has a first state that makes this switch drive this drive assembly drive this grinding plate when receiving the operation, and makes this switch stop driving this drive assembly's second state when receiving the operation. The grinding tool machine is provided with a grinding disc braking structure which is not contacted with the non-grinding surface when the pressing plate is in the first state, and the grinding disc braking structure moves towards the non-grinding surface and contacts the grinding disc when the pressing plate is in the second state so as to stop the rotation of the grinding disc.

Description

Grinding tool machine

Technical Field

The present invention relates to a polishing machine tool, and more particularly, to a polishing machine tool in which a brake pad does not contact a polishing disc when a platen is operated.

Background

Referring to fig. 1, the conventional polishing machine 70 mainly comprises a motor 71, a working shaft 72 rotating with the motor 71, a housing 73 for providing the motor 71 and the working shaft 72, a pressing plate 74 disposed on the housing 73 for determining whether the motor 71 is operated or not based on the operated state, and a polishing disc 75 disposed on the working shaft 72 and driven by the working shaft 72. When a user intends to perform polishing, the user operates the pressing plate 74 to drive the motor 71 to drive the working shaft 72, so that the polishing disc 75 rotates along with the working shaft 72 to perform polishing. When the user wants to stop the operation, the user releases the pressing plate 74 to stop driving the motor 71 to the working shaft 72, and at this time, the polishing plate 75 stops being driven, but the polishing plate 75 continues to rotate due to the inertia of the motor 71, the working shaft 72 and itself until the inertial kinetic energy is consumed. The foregoing means that the user stops driving the motor 71, but the polishing disc 75 still rotates idle, so that the user cannot replace the consumable material of the polishing machine 70 during the period, and the user's safety is easily affected.

In this regard, the prior art discloses a construction in which a Brake Lining (Brake Lining) 76 is provided in the grinding machine 70, as shown in CN 1990180A, CN 206393407U, CN 207027181U, US 5595531A, US 5679066A, US 5813903A, US 2002/019055A, EP 1277544A, GB 2273900A, GB 2359266A, GB 2416726a, fig. 1 and the like. As will be further described with reference to fig. 1, the brake pad 76 is a resilient rubber ring, and the brake pad 76 is disposed between the housing 73 and the polishing disc 75, and the brake pad 76 normally contacts the polishing disc 75 and provides resistance to the polishing disc 75 at any time. When the grinding machine 70 is started, the grinding disc 75 is rotated due to the kinetic energy output by the motor 71 being greater than the resistance force exerted by the grinding disc 75. When the motor 71 stops rotating, the brake pad 76 provides a resistance force greater than the inertial force of the grinding disc 75, so that the grinding disc 75 stops rotating. However, although the foregoing embodiment achieves the effect of braking the polishing disc 75, it is easy to increase the load of the motor 71 due to the resistance provided by the brake pad 76 in a normal state. In addition, the polishing disc 75 is also susceptible to a decrease in rotational speed due to the resistance of the brake pad 76, and thus the polishing efficiency is lowered. Furthermore, the brake pads 76 wear quickly because the brake pads 76 normally contact the abrasive disk 75.

Disclosure of Invention

The main purpose of the present invention is to solve the problem that the conventional brake lining is still contacted with the grinding disc when the grinding disc rotates.

In order to achieve the above-mentioned object, the present invention provides a polishing tool machine, which has a housing, a driving component disposed on the housing, a polishing disk driven by the driving component and defining a polishing surface and a non-polishing surface, a switch capable of driving the driving component, and a pressing plate disposed on the housing, wherein the pressing plate has a first state in which the switch is operated to drive the driving component to drive the polishing disk, and a second state in which the switch is not operated to stop driving the driving component to drive the polishing disk. Further, the polishing machine tool has a polishing disc braking structure which is not contacted with the non-polishing surface to maintain a distance when the pressing plate is in the first state, and moves towards the non-polishing surface and contacts the polishing disc when the pressing plate is in the second state so as to stop the rotation of the polishing disc.

In one embodiment, the polishing disc braking structure comprises at least one connecting rod linked by the pressing plate and a braking block arranged on the connecting rod and used for contacting the non-polishing surface.

In one embodiment, the connecting rod comprises a first part linked by the pressing plate and a second part for providing the brake block, wherein the first part is shaped into an assembling groove for providing the second part and adjusting the position.

In one embodiment, the first portion is formed with a slot in communication with the mounting slot, and the second portion is formed with at least one mounting hole that is coupled to a fastener passing through the slot.

In one embodiment, the housing has a first set of portions, and the polishing tool has a first shaft connecting the first set of portions to the platen and causing the platen to be operated to contact the link and the switch.

In one embodiment, the plurality of links are arranged in a plurality of ways, the plurality of links are connected in a shaft connection way, one of the plurality of links provides the brake block arrangement, and the other of the plurality of links is contacted with the pressing plate to serve as a driver.

In one embodiment, the polishing disc brake structure comprises a torsion spring disposed on the housing, the torsion spring having a first end abutting against the housing, and a second end abutting against one of the plurality of links coupled to the platen.

In one embodiment, the housing has a second assembling portion, and the polishing disc braking structure includes a second shaft disposed at the second assembling portion and coupled to the torsion spring and one of the plurality of links coupled to the platen, the second shaft serving as a fulcrum when one of the plurality of links coupled to the platen moves.

In one embodiment, one of the plurality of links coupled to the platen has a working end capable of being pressed by the platen, and a swing end pivotally coupled to the other of the plurality of links, wherein the one of the plurality of links coupled to the platen is configured to be assembled with the housing in a position in which the working end is higher than the swing end.

In one embodiment, one of the plurality of links coupled to the platen has a lever body disposed on the housing and an extension arm extending from one side of the lever body to provide the torsion spring, the second end of the torsion spring being abutted against the extension arm.

In one embodiment, the housing has a set of gas passages and a mounting hole providing at least one of the plurality of connecting rods, the mounting hole not communicating with the set of gas passages, one of the ports of the mounting hole being located within the projection range of the platen.

In one embodiment, the switch is disposed offset from a centerline of the platen.

Through the implementation of the invention, compared with the prior art, the invention has the following characteristics: the invention can prevent the grinding disc from being influenced by the resistance of the grinding disc braking structure when the grinding disc rotates through the arrangement of the grinding disc braking structure, and the grinding disc braking structure can also provide braking for the grinding disc when the grinding disc is about to stop rotating.

Drawings

FIG. 1 is a schematic illustration of a conventional grinding machine tool having a brake pad;

FIG. 2 is a schematic perspective view of an embodiment of the present invention;

FIG. 3 is an exploded view of one embodiment of the present invention;

FIG. 4 is a partially exploded view of one embodiment of the present invention;

FIG. 5 is a schematic top view of an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of another directional structure according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating an implementation state of an embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating the adjustment of a connecting rod according to an embodiment of the present invention.

[ symbolic description ]

100: grinding tool machine

10: outer casing

11: a first connecting part

12: second connecting part

13: assembling boss

14: gas channel

141: air inlet channel

142: air outlet channel

15: mounting hole

20: driving assembly

21: motor with a motor housing

22: working shaft

30: grinding disc

31: abrasive surface

32: non-abrasive surface

40: switch

50: pressing plate

51: perforating the hole

52: midline

60: grinding disc braking structure

601: spacing of

61: connecting rod

612: first connecting rod

613: second connecting rod

614: an opening

615: working end

616: swinging end

617: through hole

618: through hole

620: auxiliary working block

621: rod body

622: extension arm

623: hollow area

624: assembling port

625: first part

626: second part

627: assembly groove

628: long hole

629: assembly hole

630: fixing piece

631: mounting base

64: brake block

65: torsion spring

651: first end

652: second end

66: second shaft

67: third shaft

80: first shaft

70: grinding tool machine

71: motor with a motor housing

72: working shaft

73: outer casing

74: pressing plate

75: grinding disc

76: brake lining

Detailed Description

The detailed description and the technical content of the invention are now as follows in conjunction with the accompanying drawings:

referring to fig. 2 to 6, the present invention provides a polishing machine tool 100, wherein the polishing machine tool 100 has a housing 10, a driving assembly 20, a polishing plate 30, a switch 40 and a platen 50. Specifically, the driving assembly 20 is disposed in the housing 10, the driving assembly 20 includes a motor 21 and a working shaft 22, the motor 21 is not limited to be electric or pneumatic, the motor 21 outputs power after being started, and the working shaft 22 is connected to the motor 21 and is driven by the motor 21. The grinding disc 30 is connected to the working shaft 22, and the grinding disc 30 rotates along with the working shaft 22 to grind an object to be ground. The switch 40 is used for determining the on/off of the driving assembly 20, and the switch 40 is operated to drive the driving assembly 20 to operate and stops driving the driving assembly 20 after being operated again. The pressing plate 50 is disposed on the housing 10 and can be operated, the pressing plate 50 determines whether to drive the driving assembly 20 according to the operated state, in detail, the pressing plate 50 has a first operated state and a second unoperated state, when the pressing plate 50 is in the first state, the switch 40 is acted on and drives the driving assembly 20, so that the driving assembly 20 drives the polishing disc 30 to rotate, and when the pressing plate 50 is in the second state, the switch 40 is not acted on and stops driving the driving assembly 20, so that the driving assembly 20 stops driving the polishing disc 30.

On the other hand, when the switch 40 stops driving the driving unit 20, the polishing disc 30 does not receive the kinetic energy output by the driving unit 20, but the polishing disc 30 continues to rotate under the inertia of the driving unit 20 and itself. In order to avoid the idle rotation of the polishing disc 30, the polishing machine tool 100 is provided with a polishing disc braking structure 60, and the polishing disc braking structure 60 is linked with the pressing plate 50 and is used for providing braking to the polishing disc 30. As explained in detail with reference to fig. 7, the polishing disc 30 has a polishing surface 31 and a non-polishing surface 32, the polishing surface 31 is disposed on a side of the polishing disc 30 facing the object to be polished and is capable of polishing the object to be polished, the non-polishing surface 32 is not used for polishing, the non-polishing surface 32 may be a surface of the polishing disc 30 facing the housing 10 or an inclined side of the polishing disc 30 connecting the polishing surface 31 and the surface, and the polishing disc braking structure 60 provides resistance to the polishing disc 30 to stop the polishing disc 30 from rotating when the polishing disc braking structure 60 contacts the surface or the inclined side.

In the following, the implementation of the polishing machine tool 100 will be explained in more detail with reference to fig. 7 to 8. Assuming initially that the platen 50 is not operated, the platen 50 is in the second state, the abrasive disk 30 is not driven and is in contact with the abrasive disk braking structure 60 and is fully stationary, as shown in fig. 7. When the platen 50 is operated, the platen 50 enters the first state, and the switch 40 drives the driving assembly 20 to start rotating the polishing platen 30. At the same time, the disc brake mechanism 60 is moved by the platen 50, the disc brake mechanism 60 no longer contacts the non-abrasive surface 32 and maintains a gap 601 between the non-abrasive surface 32, such that the disc 30 can rotate without being resisted by the disc brake mechanism 60, as shown in fig. 8. When the platen 50 is no longer operated, the platen 50 is again transitioned to the second state, and the switch 40 stops driving the drive assembly 20 such that the polishing platen 30 is no longer driven. At this time, the polishing disc braking structure 60 moves toward the non-polishing surface 32 and contacts the polishing disc 30, so that the polishing disc 30 is braked by the polishing disc braking structure 60, and the rotation is stopped.

Referring to fig. 1 and 2 in combination, the present invention solves the problem that the conventional polishing disc 75 idles when it stops being driven, and therefore the polishing disc braking structure 60 is disposed on the polishing machine tool 100, so that the polishing disc 30 can be braked by the polishing disc braking structure 60 when it stops being driven, and can stop rotating rapidly. In addition, the polishing disc brake structure 60 of the present invention only provides braking when the polishing disc 30 is not driven, and when the polishing disc 30 is driven, the polishing disc brake structure 60 does not contact with the polishing disc 30, the polishing disc brake structure 60 does not cause resistance to the rotation of the polishing disc 30, the kinetic energy loss output by the driving assembly 20 is reduced, and the problem of rapid loss of the conventional brake pads 76 caused by long-time friction of the conventional brake pads 76 due to the conventional friction of the polishing disc 75 is changed.

Referring back to fig. 2 to 4 and 7, in one embodiment, the polishing disc braking structure 60 includes at least one link 61 and a brake block 64 disposed on the link 61, wherein the link 61 faces the platen 50, and the brake block 64 is disposed on the link 61 and driven by the link 61. When the pressing plate 50 enters the second state, the connecting rod 61 is linked by the pressing plate 50, so that the brake block 64 contacts the non-abrasive surface 32.

Furthermore, the housing 10 forms a first assembling portion 11, the pressing plate 50 forms at least one opening 51, the polishing tool 100 has a first shaft 80, the opening 51 is disposed corresponding to the first assembling portion 11, and the first shaft 80 is disposed between the first assembling portion 11 and the opening 51. Through the first shaft 80, the pressing plate 50 can be displaced toward the housing 10 when the second state is changed to the first state, and the connecting rod 61 and the switch 40 are located on the displacement path of the pressing plate 50, so that the pressing plate 50 can press the connecting rod 61 and the switch 40 when entering the first state.

In another embodiment, referring to fig. 2 to 4 and 7, the plurality of links 61 may be disposed, the plurality of links 61 may be connected by a shaft, one of the plurality of links 61 may provide the brake block 64, and the other of the plurality of links 61 may be coupled with the platen 50. For convenience of description, one of the plurality of links 61 provided with the brake block 64 is temporarily used as a first link 612, one of the plurality of links 61 linked with the platen 50 is used as a second link 613, the second link 613 can be directly connected with the first link 612 in a shaft manner, the second link 613 and the first link 612 can also be assembled through the other links 61, and the second link 613 is used as a driver of the first link 612, and the second link 613 drives the first link 612 after being acted by the platen 50.

Further, the polishing disc braking structure 60 includes a torsion spring 65, where the torsion spring 65 is disposed on the housing 10 and contacts the second link 613, the torsion spring 65 has a first end 651 and a second end 652, the first end 651 abuts against the housing 10, the second end 652 abuts against the second link 613, when the second link 613 is linked by the pressing plate 50, the second end 652 is pressed by the second link 613, so that the torsion spring 65 is compressed and stores elastic force, when the second link 613 is no longer driven by the pressing plate 50, the torsion spring 65 releases elastic force, and the second end 652 pushes against the second link 613, so as to restore the second link 613.

The housing 10 has a second assembling portion 12, the second connecting rod 613 has at least one opening 614 corresponding to the second assembling portion 12, the polishing disc braking structure 60 has a second shaft 66, the second shaft 66 is connected to the torsion spring 65 and is disposed between the second assembling portion 12 and the opening 614, the second shaft 66 serves as a fulcrum when the second connecting rod 613 moves, and the fulcrum enables two ends of the second connecting rod 613 to swing relative to the housing 10 when driven by the pressing plate 50 or pushed by the torsion spring 65. In addition, two ends of the second connecting rod 613 can be divided into a working end 615 and a swinging end 616, wherein the working end 615 can be driven by the pressing plate 50, and the swinging end 616 is directly or indirectly connected with the first connecting rod 612. Since the swing end 616 is acted by the gravity of the first link 612, the second link 613 and the housing 10 are assembled in an inclined posture, that is, the horizontal height of the working end 615 is greater than the horizontal height of the swing end 616. In one embodiment, when the second connecting rod 613 is directly coupled to the first connecting rod 612, the swinging end 616 forms at least one through hole 617, the first connecting rod 612 forms at least one through hole 618 corresponding to the through hole 617, the polishing disc brake structure 60 has a third shaft 67 disposed between the through hole 617 and the through hole 618, the swinging end 616 is coupled to the first connecting rod 612 through the third shaft 67, and when the working end 615 is pressed by the pressing plate 50, the swinging end 616 lifts the first connecting rod 612 based on leverage. In another embodiment, the second link 613 forms an auxiliary working block 620, the auxiliary working block 620 extends from the working end 615 toward the pressing plate 50, and the extending direction of the auxiliary working block 620 is different from the tilting direction of the second link 613, thereby assisting the pressing plate 50 to press the working end 615.

In another embodiment, referring to fig. 4 to 7, the housing 10 is formed with an assembling boss 13 facing the pressing plate 50, the assembling boss 13 providing the switch 40, the assembling boss 13 being adjacent to the working end 615 and not interfering with the movement of the second link 613. In detail, the pressing plate 50 has a center line 52, the working end 615 is located on the center line 52, and the assembling boss 13 is located at one side of the working end 615 such that the switch 40 is deviated from the center line 52. It should be noted that the setting range of the switch 40 must be within the area where the pressing plate 50 can touch the switch 40 while pressing the working end 615, so that the pressing plate 50 can control the working end 615 and also control the switch 40.

Further, the second connecting rod 613 has a rod body 621 and an extension arm 622, the rod body 621 is provided with the working end 615 and the swinging end 616, the rod body 621 is disposed on the housing 10, the rod body 621 forms a hollowed-out area 623, the hollowed-out area 623 does not interfere with the first assembling portion 11 when the second connecting rod 613 swings, the extension arm 622 extends from one side of the rod body 621, and the extension arm 622 provides the second end 652 of the torsion spring 65 to prop against. In one embodiment, the extension arm 622 defines an assembly opening 624, the assembly opening 624 being positioned on the same extension line as the opening 614, the opening 614 providing for the passage of the second shaft 66.

On the other hand, referring to fig. 3 to 6, when the polishing machine tool 100 of the present invention is a pneumatic machine tool, the housing 10 has a set of gas channels 14 and a mounting hole 15, the set of gas channels 14 includes a gas inlet channel 141 and a gas outlet channel 142, the gas inlet channel 141 is controlled by the switch 40 to determine whether to drive the driving component 20, the gas outlet channel 142 is linked with the gas inlet channel 141 and provides gas exhaust, the mounting hole 15 provides at least one of the plurality of connecting rods 61, and the mounting hole 15 is not connected with the set of gas channels 14. The mounting hole 15 may be integrally formed with the housing 10, or may be formed by communicating two ports provided on the housing 10, wherein one of the ports of the mounting hole 15 is located within the projection range of the platen 50.

In addition to the foregoing, referring to fig. 7 to 9, in order to adjust the height of the brake pad 64 relative to the polishing disc 30, the link 61 provided with the brake pad 64 includes a first portion 625 and a second portion 626. Wherein the second portion 626 provides for the positioning of the brake pads 64, and the first portion 625 is directly pressed by the pressure plate 50 when the link 61 is provided in the singular, and the first portion 625 is directly or indirectly connected to the second link 613 when the link 61 is provided in the plural, and the second link 613 is pressed by the pressure plate 50. In addition, the first portion 625 defines a mounting slot 627, the mounting slot 627 providing for the second portion 626 to be positioned therein and adjustably positioned, the mounting slot 627 limiting the linear displacement of the second portion 626 relative to the first portion 625. In addition, the first portion 625 forms a long hole 628, the long hole 628 is coupled with the assembling groove 627, the second portion 626 forms at least one assembling hole 629, the first connecting rod 612 includes at least one fixing member 630, and the fixing member 630 is assembled with the assembling hole 629 through the long hole 628, so that the assembling position of the second portion 626 is fixed. At the same time, the present invention limits the displacement range of the second portion 626 relative to the first portion 625 through the arrangement of the elongated hole 628. In yet another embodiment, the first link 612 has a mounting seat 631 disposed on the second portion 626, the mounting seat 631 having a size larger than the second portion 626 and providing the brake pad 64 disposed thereon.

Claims (12)

1. The utility model provides a grinding machine tool, this grinding machine tool has a shell, locate the drive assembly of this shell, one is driven by this drive assembly and define the grinding disc that has a grinding surface and a non-grinding surface, a switch that can drive this drive assembly, and a clamp plate of locating this shell, this clamp plate has one when being operated to make this switch drive this drive assembly drive this grinding disc's first state, and when not receiving to make this switch stop driving this drive assembly drive this grinding disc's second state, this grinding machine tool characterized in that:

the grinding tool machine is provided with a grinding disc braking structure which is not contacted with the non-grinding surface to keep a distance when the pressing plate is in the first state, and the grinding disc braking structure moves towards the non-grinding surface and contacts with the grinding disc when the pressing plate is in the second state so as to stop the rotation of the grinding disc.

2. The machine tool of claim 1 wherein the disc brake structure comprises at least one link coupled to the platen and a brake pad disposed on the link and adapted to contact the non-abrasive surface.

3. The machine tool of claim 2 wherein the linkage includes a first portion coupled to the platen and a second portion providing the stop arrangement, the first portion defining an assembly slot providing the second portion disposed therein and capable of adjusting position.

4. The machine tool of claim 3 wherein the first portion is formed with an elongated aperture in communication with the mounting slot and the second portion is formed with at least one mounting hole that is assembled with a fastener passing through the elongated aperture.

5. The abrasive tool machine of claim 4, wherein the housing has a first set of portions, the abrasive tool machine having a first shaft connecting the first set of portions and the platen.

6. The machine tool of claim 5 wherein the links are provided in a plurality of pairs, the plurality of links being pivotally connected, one of the plurality of links providing the stop arrangement, the other of the plurality of links being in contact with the platen as a driver.

7. The polishing machine tool of claim 6 wherein the polishing disc brake structure comprises a torsion spring disposed in the housing, the torsion spring having a first end abutting the housing and a second end abutting one of the plurality of links in communication with the platen.

8. The abrasive machine tool of claim 7, wherein the housing has a second engagement portion, the abrasive disk brake structure including a second shaft disposed in the second engagement portion and coupled to the torsion spring and one of the plurality of links coupled to the platen, the second shaft acting as a fulcrum when one of the plurality of links coupled to the platen is moved.

9. The abrasive machine tool of claim 8, wherein one of the plurality of links coupled to the platen has a working end capable of being pressed by the platen and a swing end pivotally coupled to another of the plurality of links, wherein one of the plurality of links coupled to the platen is assembled with the housing in a position in which the working end is higher than the swing end.

10. The abrasive machine tool of claim 9, wherein one of the plurality of links coupled to the platen has a lever body disposed in the housing and an extension arm extending from a side of the lever body to provide the torsion spring arrangement, the second end of the torsion spring abutting the extension arm.

11. The abrasive machine tool of claim 5, wherein the housing has a set of gas passages and a mounting hole providing at least one of the plurality of links, the mounting hole not communicating with the set of gas passages, one of the ports of the mounting hole being located within a projected area of the platen.

12. The abrasive machine tool of claim 11, wherein the switch is disposed offset from a centerline of the platen.