Multifunctional polishing accessory for angle grinder

Abstract

The invention discloses a multifunctional polishing accessory for an angle grinder, and aims to solve the technical problems that an existing polishing tool is single in operation mode and cannot meet the multifunctional polishing requirement. The multifunctional polishing accessory comprises an input connecting unit, a dustproof shield, an eccentric mounting seat, a bearing mounting seat, an eccentric adjusting element, a bearing part, a polishing disc mounting seat, a polishing disc and the like. The position of the bearing mounting seat is adjusted through the eccentric adjusting element, two concentric and eccentric polishing modes are achieved, and the eccentric distance is adjustable. The connecting ring is connected with the angle grinder shaft neck part, the connecting plate is connected with the dustproof shield, and the structure is simple and reliable. The polishing accessory can meet diversified operation requirements, and the connecting mode is fast, simple and convenient. And meanwhile, the dustproof shield is provided with a dust removal connector and a rubber sleeve, so that the use convenience and safety are improved. The polishing accessory has the advantages of multifunctionality, usability, high efficiency and the like, has high compatibility and operation efficiency, and expands the polishing application scene of the angle grinder.

Description

Technical Field

[0001] The invention relates to an angle grinder accessory, in particular to an angle grinder polishing accessory which can be conveniently connected to the angle grinder and can perform polishing in multiple modes, and belongs to the technical field of electric tools. Background Art

[0002] Angle grinders are common electric tools that are usually equipped with cutting blades and are mainly used for cutting metal, wood, stone and other materials. In the prior art, when an angle grinder needs to be converted into a polisher, it is generally only necessary to simply connect a polishing disc to the output shaft of the angle grinder so that the angle grinder can be used as a polisher. However, this method of use usually only enables concentric polishing, and the operation method is relatively simple and the polishing efficiency is not high.

[0003] In order to meet the diverse operational needs, users generally need to be equipped with special polishing tools. Existing polishing tools include both concentric polishing and eccentric polishing, but generally only have one polishing mode, and the operation method is relatively simple, which cannot meet the diverse operational needs of users, and usually requires the replacement of specific polishing tools. In other words, traditional polishing tools are often designed in a relatively simple manner, and most polishing tools only have concentric polishing mode or eccentric polishing mode. The concentric polishing mode is suitable for fine polishing of local details in the later stage, and the eccentric polishing mode is suitable for fast and efficient polishing of large areas in the early stage. Therefore, in order to meet the operational needs, users usually need to prepare multiple sets of accessories, which brings inconvenience to accessory replacement and operational efficiency.

[0004] Therefore, there is an urgent need for a new type of angle grinder polishing attachment, which can not only provide a concentric polishing mode, but also realize a polishing mode in which the polishing disc and the angle grinder output shaft are not concentric, so as to take into account the multiple polishing operation requirements of polishing efficiency, polishing uniformity and fine polishing. Summary of the invention

[0005] The present invention aims to provide a multifunctional polishing attachment for an angle grinder, so as to solve the technical problem that the polishing tool in the prior art has a single operation mode and cannot satisfy the multifunctional polishing requirement.

[0006] To this end, the technical solution of the present invention is as follows: A multifunctional polishing attachment for an angle grinder, characterized by comprising: An input connection unit, the input connection unit having a connection ring and a connection plate, the connection ring being used to connect to a shaft neck of an angle grinder; A dustproof shield, the dustproof shield having a top wall and surrounding side walls, the top wall being provided with a connecting platform, the connecting platform being fixedly connected to the connecting plate; An eccentric mounting seat, wherein the eccentric mounting seat has a top cover portion and a side peripheral portion, a first accommodating cavity is formed between the top cover portion and the side peripheral portion, and a threaded shaft connecting hole is provided on the top cover portion, and the threaded shaft connecting hole is used to connect with the output shaft of the angle grinder; A bearing mounting seat, wherein the bearing mounting seat is disposed in the first accommodating cavity, and the position of the bearing mounting seat in the first accommodating cavity is adjustable; An eccentric adjustment element, wherein the eccentric adjustment element is disposed on the eccentric mounting seat, and the eccentric adjustment element acts on the bearing mounting seat to adjust the position of the bearing mounting seat in the first accommodating cavity; A bearing portion, the bearing portion being disposed in the bearing mounting seat; A polishing disc mounting seat, wherein the polishing disc mounting seat is connected to the bearing portion; A polishing disc is detachably connected to the polishing disc mounting seat.

[0007] Furthermore, the connecting ring is a non-closed ring with an open end, and lugs are provided at both ends of the connecting ring. The lugs are provided with locking holes, and locking bolts pass through the locking holes and cooperate with nuts to fasten the connecting ring to the shaft neck of the angle grinder; The connecting plate is provided with a connecting hole, the connecting platform is provided with a threaded portion, and a connecting screw passes through the connecting hole and is screwed into the threaded portion, so that the connecting plate is fastened to the connecting platform.

[0008] Further, the side peripheral portion includes a first side peripheral portion, a second side peripheral portion, a third side peripheral portion, and a fourth side peripheral portion, the first side peripheral portion is provided with an eccentric adjustment hole, the eccentric adjustment element is located in the eccentric adjustment hole, and the eccentric adjustment element is an eccentric adjustment screw; A preload adjustment hole is provided on the second side peripheral portion, a preload screw and a preload spring are provided in the preload adjustment hole, and the preload spring abuts against the bearing mounting seat.

[0009] Furthermore, guide grooves are provided on the third side peripheral portion and the fourth side peripheral portion, and guide ribs cooperating with the guide grooves are provided on the bearing mounting seat.

[0010] Furthermore, it also includes a pressure plate and a balance block, wherein the pressure plate is fixedly connected to the side peripheral portion by screws, and the balance block is fixedly connected to the second side peripheral portion by screws.

[0011] Furthermore, a sliding sheet is arranged between the bearing mounting seat and the pressure plate.

[0012] Furthermore, the bearing mounting seat is also provided with an abutment positioning hole, and one end of the preload spring is located in the abutment positioning hole.

[0013] Furthermore, the polishing disk mounting seat has a bearing connection end and a drive connection end, and a central threaded hole is provided at the central parts of the bearing connection end and the drive connection end. The bearing connection end is inserted into the bearing part, and a countersunk screw is screwed into the central threaded hole to keep the polishing disk mounting seat connected to the bearing part, and the drive connection end has a driving plane.

[0014] Furthermore, an adapter is provided between the polishing disk mounting seat and the polishing disk, the adapter having a driven end and a driving claw, the driven end having a driven plane, the driving connecting end being insertable into the driven end, the adapter being driven by the cooperation between the driving plane and the driven plane, and the driving claw being insertable into the claw hole on the driving disk to drive the polishing disk.

[0015] Furthermore, a dust removal interface is provided on the surrounding side wall of the protective cover, and a rubber sleeve is also provided on the lower periphery of the dustproof protective cover.

[0016] The polishing attachment of the present invention has two polishing modes: concentric and eccentric. The eccentricity is adjustable within a certain range. Users can quickly adjust according to the working situation, thus meeting the diverse working needs of users. In addition, the attachment can be quickly connected to the angle grinder, and the connection method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram showing the overall structure of the multifunctional polishing machine attachment of the present invention; Figure 2 Show Figure 1 Schematic diagram of the exploded structure of the polishing machine attachment; Figure 3 A schematic diagram of the overall cross-sectional structure of the polishing machine attachment is shown; Figure 4 A schematic diagram showing the cross-sectional structure of some components in the polishing machine attachment; Figure 5 Show Figure 4 Sectional view along line AA; Figure 6 A schematic diagram showing the assembly between the eccentric mounting seat and the bearing mounting seat; Figure 7 A schematic diagram of the structure of an eccentric mounting seat is shown; Figure 8 A schematic diagram of the structure of the bearing mounting seat is shown; Fig. 9 Schematic diagram showing the exploded structure between the eccentric mount and the bearing mount Fig.10 The connection structure between the polishing disc mounting seat and the polishing disc is shown; In the figure, 10-input connection unit, 20-dustproof shield, 30-rubber sleeve, 40-polishing disc, 11-connecting ring, 12-connecting plate, 13-connecting screw, 14-connecting hole, 15-lug, 16-locking hole, 17-locking bolt, 18-locking nut, 21-top wall, 22-surrounding side wall, 23-connecting platform, 24-threaded portion, 25-dust removal interface, 50-eccentric mounting seat, 60-bearing mounting seat, 51-top cover portion, 511-threaded shaft connecting hole, 52-side peripheral portion, 521-first side peripheral portion, 522-second side peripheral portion, 523-third side peripheral portion, 524-fourth side peripheral portion, 53-eccentric adjustment hole, 54-preload adjustment hole, 61-first bearing, 62-second bearing, 63-polishing disk mounting seat, 631-bearing connecting end, 632-driving connecting end, 633-driving plane, 634-center threaded hole, 651-driven end, 652-driving claw, 653-driven plane, 41-claw hole, 64-countersunk screw, 65-adapter, 500-first accommodating chamber, 70-eccentric adjustment element, 80-preload spring, 90-balancing block, 525-guide groove, 625-guide rib, 66-slide mounting portion, 67-slide, 600-second accommodating chamber, 68-resting positioning hole, 100-preload screw, 91-pressure plate, X1-first axis, X2-second axis, e-eccentricity. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1 , Figure 2 As shown, the multifunctional polishing attachment of the present invention includes an input connection unit 10, which is mainly used to firmly connect the attachment to the angle grinder. The input connection unit 10 has a connecting ring 11, which is used to be clamped to the shaft neck of the angle grinder (not shown in the figure), and the connecting ring 11 is tightened by a locking device, so that the connecting ring 11 is reliably attached to the angle grinder.

[0020] As one embodiment, the connecting ring 11 can be designed as a non-closed ring with an open end. Lugs 15 are provided at both ends of the connecting ring 11, and locking holes 16 are provided on the lugs 15. The locking bolts 17 pass through the locking holes 16 and cooperate with the nuts 18 to fasten the connecting ring 11 to the shaft neck of the angle grinder.

[0021] A connecting plate 12 is also provided below the connecting ring 11, and a dust cover 20 is connected below the connecting plate 12. In order to achieve a more convenient connection between the connecting plate 12 and the dust cover 20, a connecting hole 14 is provided on the connecting plate 12 of the present invention, and the dust cover 20 can be connected to the connecting plate 12 by connecting screws 13.

[0022] The dust shield 20 has a top wall 21 and surrounding side walls 22. A connecting platform 23 is provided on the top wall 21. As one preferred embodiment, the connecting platform 23 can be designed to be a truncated cone with a through hole in the center so that the input shaft of the angle grinder can extend into the dust shield 20 to provide driving force for the related components.

[0023] The connection platform 23 extends downwardly from the inside of the protective cover 20 to form a plurality of columnar portions, on which threaded portions 24 are provided, so that the connection screws 13 can pass through the connection holes 14 and be screwed into the threaded portions 24 , thereby fixing the dust cover 20 to the connection plate 12 .

[0024] like Figures 3 to 9 As shown, an eccentric mounting seat 50 is arranged inside the dust shield 20, and the eccentric mounting seat 50 has a top cover portion 51 and a side peripheral portion 52. The top cover portion 51 and the side peripheral portion 52 surround a first accommodating chamber 500, and a threaded shaft connecting hole 511 is arranged on the top cover portion 51. The threaded shaft connecting hole 511 has a first axis X1, and the threaded shaft connecting hole 511 is used for threaded connection with the output shaft of the angle grinder, so that the output shaft of the angle grinder can provide rotational power for the eccentric mounting seat 50. The side peripheral portion 52 includes a first side peripheral portion 521, a second side peripheral portion 522, a third side peripheral portion 523, and a fourth side peripheral portion 524, wherein the first side peripheral portion 521 and the second side peripheral portion 522 are located on opposite sides to each other, and the third side peripheral portion 523 and the fourth side peripheral portion 524 are located on opposite sides to each other, and these four side peripheral portions together form the side peripheral portion 52.

[0025] A bearing mounting seat 60 is arranged in the first accommodating cavity 500, and the position of the bearing mounting seat 60 is adjustable relative to the eccentric mounting seat 50. It has a second accommodating cavity 600, and a bearing part is installed in the second accommodating cavity 600. As a typical embodiment, the bearing part has a first bearing 61 and a second bearing 62, which are coaxially arranged from top to bottom in the second accommodating cavity 600.

[0026] A polishing disk mounting seat 63 is connected below the bearing portion, and the polishing disk mounting seat 63 has a bearing connection end 631 and a drive connection end 632. A central threaded hole 634 is provided at the central portion of the bearing connection end 631 and the drive connection end 632. The central threaded hole 634 has a second axis X2, and the distance e between the second axis X2 and the first axis X1 is the eccentricity. The position of the bearing mounting seat 60 relative to the eccentric mounting seat 50 of the present invention is adjustable, so the eccentricity e is adjustable, and the user can select a suitable eccentricity for polishing operations as needed. When the eccentricity is adjusted to 0, a concentric polishing mode can be realized, which can be used for local fine polishing; when the eccentricity is adjusted to not 0, for example, when the eccentricity 3 is adjusted to the range of 1-3 mm, an eccentric polishing mode can be realized.

[0027] like Figure 3 As shown, the bearing connection end 631 has an outer cylindrical surface, which can be inserted into the inner ring of the bearing part. The polishing disk mounting seat 63 is kept connected to the bearing part by screwing the countersunk screw 64 into the center threaded hole 634. The driving connection end 632 also has an outer cylindrical surface, and a portion of the outer cylindrical surface is removed to form a driving plane 633.

[0028] like Fig. 9 , 10 As shown, in order to better connect the polishing disk 40 with the polishing disk mounting seat 63 and provide the polishing disk 40 with a non-slip driving force, the present invention further provides an adapter 65 between the polishing disk mounting seat 63 and the polishing disk 40, the adapter 65 has a driven end 651 and a driving claw 652, the driven end 651 has a driven plane 653, the driving connection end 632 can be inserted into the driven end 651, and the adapter 65 is driven to rotate through the cooperation of the driving plane 633 and the driven plane 653, the driving claw 652 can be inserted into the claw hole 41 on the driving disk 40 to drive the polishing disk 40 to rotate, the fastening screw passes through the polishing disk 40, the adapter 65 and is screwed into the central threaded hole 634 on the polishing disk mounting seat 63, so that the polishing disk 40 is firmly connected to the polishing disk mounting seat 63.

[0029] like Figure 5-8 As shown, in order to achieve a reliable support connection between the eccentric mounting seat 50 and the bearing mounting seat 60 and facilitate the adjustment of the eccentric distance e, the present invention is provided with an eccentric adjustment hole 53 on the first side periphery 521, and the eccentric adjustment element 70 is located in the eccentric adjustment hole 53. As one of the preferred embodiments, the eccentric adjustment element 70 is an eccentric adjustment screw.

[0030] Furthermore, a preload adjustment hole 54 is provided on the second side peripheral portion 522, and a preload screw 100 and a preload spring 800 are provided in the preload adjustment hole 54, and the preload spring 80 abuts against the bearing mounting seat 60. In order to allow the preload spring 80 to abut against the bearing mounting seat 60 reliably, an abutment positioning hole 68 is further provided on the bearing mounting seat 60, and one end of the preload spring 80 is located in the abutment positioning hole 68.

[0031] In order to better guide the movement of the bearing mounting seat 60 when the user adjusts the eccentricity e and provide certain operation feedback to the user, the present invention also provides guide grooves 525 on the third side periphery 523 and the fourth side periphery 524, and the bearing mounting seat 60 is provided with guide ribs 625 that cooperate with the guide grooves 525, and a slide mounting portion 66 is provided on the guide ribs 625, and the slide mounting portion 66 is used to install the slide 67, and the installation slide 67 is a corrugated metal spring, and the slide 67 is maintained on the bearing mounting seat 60 and between the pressure plate 91 through the pressure plate 91, and the pressure plate 91 is fixedly connected to the side periphery 52 of the eccentric mounting seat 50 through screws. Such a configuration allows the user to adjust the eccentricity e through the eccentric adjustment element 70, and can remind the user through the click sound feedback from the installation slide 67.

[0032] In order to reduce the difficulty of assembling the balancing weight, the present invention provides a balancing weight 90 on the eccentric mounting seat 50 , and the balancing weight 90 is fixedly connected to the second side peripheral portion 524 by screws.

[0033] In order to reduce the impact of dust on users during polishing operations, a dust removal interface 25 is provided on the surrounding side wall 22 of the dust shield 20, and a rubber sleeve 30 is also provided on the lower periphery of the dust shield 22. The connection between the dust shield 20 and the rubber sleeve 30 is achieved by matching a circular clamping ring provided on the surrounding side wall 22 with a clamping groove provided on the inner wall of the rubber sleeve 30.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0035] In the above description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the above description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A multifunctional polishing attachment for an angle grinder, characterized in that include: An input connection unit, the input connection unit having a connection ring and a connection plate, the connection ring being used to connect to a shaft neck of an angle grinder; A dustproof shield, the dustproof shield having a top wall and surrounding side walls, the top wall being provided with a connecting platform, the connecting platform being fixedly connected to the connecting plate; An eccentric mounting seat, wherein the eccentric mounting seat has a top cover portion and a side peripheral portion, a first accommodating cavity is formed between the top cover portion and the side peripheral portion, and a threaded shaft connecting hole is provided on the top cover portion, and the threaded shaft connecting hole is used to connect with the output shaft of the angle grinder; A bearing mounting seat, wherein the bearing mounting seat is disposed in the first accommodating cavity, and the position of the bearing mounting seat in the first accommodating cavity is adjustable; An eccentric adjustment element, wherein the eccentric adjustment element is disposed on the eccentric mounting seat, and the eccentric adjustment element acts on the bearing mounting seat to adjust the position of the bearing mounting seat in the first accommodating cavity; A bearing portion, the bearing portion being disposed in the bearing mounting seat; A polishing disc mounting seat, wherein the polishing disc mounting seat is connected to the bearing portion; A polishing disc is detachably connected to the polishing disc mounting seat.

2. The multifunctional polishing attachment according to claim 1, characterized in that: The connecting ring is a non-closed ring with an open end, and lugs are provided at both ends of the connecting ring. The lugs are provided with locking holes, and locking bolts pass through the locking holes and cooperate with nuts to fasten the connecting ring to the shaft neck of the angle grinder; The connecting plate is provided with a connecting hole, the connecting platform is provided with a threaded portion, and a connecting screw passes through the connecting hole and is screwed into the threaded portion, so that the connecting plate is fastened to the connecting platform.

3. The multifunctional polishing attachment according to claim 1, characterized in that: The side peripheral portion includes a first side peripheral portion, a second side peripheral portion, a third side peripheral portion, and a fourth side peripheral portion, the first side peripheral portion is provided with an eccentric adjustment hole, the eccentric adjustment element is located in the eccentric adjustment hole, and the eccentric adjustment element is an eccentric adjustment screw; A preload adjustment hole is provided on the second side peripheral portion, a preload screw and a preload spring are provided in the preload adjustment hole, and the preload spring abuts against the bearing mounting seat.

4. The multifunctional polishing attachment according to claim 3, characterized in that: The third side peripheral portion and the fourth side peripheral portion are provided with guide grooves, and the bearing mounting seat is provided with guide ribs matched with the guide grooves.

5. The multifunctional polishing attachment according to claim 3, characterized in that: It also includes a pressing plate and a balancing block, wherein the pressing plate is fixedly connected to the side peripheral portion by screws, and the balancing block is fixedly connected to the second side peripheral portion by screws.

6. The multifunctional polishing attachment according to claim 3, characterized in that: A sliding sheet is arranged between the bearing mounting seat and the pressure plate.

7. The multifunctional polishing attachment according to claim 3, characterized in that: The bearing mounting seat is also provided with an abutment positioning hole, and one end of the preload spring is located in the abutment positioning hole.

8. The multifunctional polishing attachment according to claim 1, characterized in that: The polishing disk mounting seat has a bearing connection end and a drive connection end, and a central threaded hole is provided at the central parts of the bearing connection end and the drive connection end. The bearing connection end is inserted into the bearing part, and a countersunk screw is screwed into the central threaded hole to keep the polishing disk mounting seat connected to the bearing part, and the drive connection end has a drive plane.

9. The multifunctional polishing attachment according to claim 8, characterized in that: An adapter is also provided between the polishing disk mounting seat and the polishing disk, the adapter having a driven end and a driving claw, the driven end having a driven plane, the driving connecting end being insertable into the driven end, the adapter being driven by the cooperation between the driving plane and the driven plane, the driving claw being insertable into the claw hole on the driving disk to drive the polishing disk.

10. The multifunctional polishing attachment according to claim 1, characterized in that: A dust removal interface is arranged on the peripheral side wall of the protective cover, and a rubber sleeve is also arranged on the lower periphery of the dustproof protective cover.

Images