A square electric grinder

Abstract

The present application discloses a square electric grinder, comprising a square housing, a motor, an eccentric block and a grinding disc mounting plate for mounting a grinding disc, wherein the motor is mounted on the square housing, the eccentric block is mounted on the rotating shaft of the motor, the grinding disc mounting plate is movably mounted on the square housing, and the inner side wall of the grinding disc mounting plate abuts against the outer side wall of the eccentric block. The present application drives the eccentric block to rotate eccentrically by a motor, thereby driving the grinding disc mounting plate to reciprocate along the radial direction of the rotating shaft of the motor, so that the grinding disc on the grinding disc mounting plate grinds and polishes the workpiece to be processed, which has the advantages of sufficient power and high grinding efficiency. At the same time, the eccentric block is used to drive the grinding disc to reciprocate, so that the grinding trajectory can be more stable and the grinding texture can be more uniform, and the electric drive has less noise than the pneumatic drive.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of electric tools, and in particular to a square electric grinder. Background Art

[0002] A grinding and polishing machine is a manual electric tool that grinds the surface of an object. It uses various driving mechanisms to make the grinding disc rotate continuously and quickly, thereby grinding the surface of the object. Currently, the industry is using pneumatic grinders, but currently pneumatic eccentric grinders have at least the following disadvantages:

[0003] 1. Insufficient power, the machine is prone to jamming after being subjected to force; 2. The grinding track is unstable and the grinding lines are rough; 3. Driven by compressed air, it is noisy. Utility Model Content

[0004] The embodiment of the utility model provides a square electric grinder to solve the above-mentioned technical problems existing in the current pneumatic grinders.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides a square electric grinder, comprising a square shell, a motor, an eccentric block and a grinding disc mounting plate for mounting a grinding disc, the motor being mounted on the square shell, the eccentric block being mounted on the rotating shaft of the motor, the grinding disc mounting plate being movably mounted on the square shell, and the inner side wall of the grinding disc mounting plate abuts against the outer side wall of the eccentric block.

[0006] Preferably, the eccentric block comprises a cylindrical base and an eccentric cylinder fixed on the base, the eccentric cylinder is provided with a cylindrical hole deviating from the axis, and the rotating shaft of the motor is inserted into the cylindrical hole.

[0007] Preferably, it also includes a bearing and a bearing mounting seat, the bearing is mounted on the bearing mounting seat, the bearing mounting seat is fixedly mounted on the grinding disc mounting plate, the inner ring of the bearing abuts against the outer ring of the eccentric cylinder, and the outer wall of the base abuts against the inner wall of the bearing mounting seat.

[0008] Preferably, the bearing mounting seat comprises a bearing cavity for mounting the bearing, and a circle of annular groove is provided on the outer side of the bearing cavity, and the annular groove is used to set the base and make the outer side wall of the base abut against the side wall of the annular groove.

[0009] Preferably, a bearing cover for preventing the bearing mounting seat from axially moving is further provided above the bearing mounting seat, and a through hole for the rotating shaft of the motor to pass through is provided on the bearing cover.

[0010] Preferably, a sealing ring is provided between the grinding disc mounting plate and the square housing.

[0011] Preferably, a cooling fan is also provided on the rotating shaft of the motor, and the cooling fan is used to dissipate heat for the motor.

[0012] Preferably, it also includes a shell installed on the square shell, and the motor is arranged in the shell.

[0013] Preferably, a fixing plate is further included, and the housing and the motor are both fixedly connected to the fixing plate.

[0014] Preferably, the housing and the motor are both connected to the fixing plate by bolts.

[0015] The embodiments of the utility model have the following beneficial effects: the eccentric block is driven by a motor to rotate eccentrically, thereby pushing the grinding disc mounting plate to reciprocate along the radial direction of the motor shaft, so that the grinding disc on the grinding disc mounting plate can grind and polish the workpiece to be processed, which has the advantages of sufficient power and high grinding efficiency. At the same time, the eccentric block is used to drive the grinding disc to do reciprocating motion, so that the grinding trajectory can be more stable and the grinding texture can be more uniform, and the electric drive has less noise than the pneumatic drive.

[0016] In addition to the above-described purposes, features and advantages, the embodiments of the present utility model have other purposes, features and advantages. The embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the embodiments of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the square electric grinder of the utility model;

[0019] Figure 2 It is an exploded view of the square electric grinder of the utility model;

[0020] Figure 3 It is a side projection view of the square electric grinder of the utility model;

[0021] Figure 4 yes Figure 3 AA section view;

[0022] Figure 5 It is a structural schematic diagram of the eccentric block of the square electric grinder of the utility model;

[0023] Figure 6 It is a structural schematic diagram of a bearing mounting seat of a square electric grinder of the utility model.

[0024] The reference numerals are as follows:

[0025] 1. Motor; 11. Rotating shaft; 2. Eccentric block; 21. Base; 22. Eccentric cylinder; 221. Cylindrical hole; 3. Grinding disc mounting plate; 4. Square shell; 5. Bearing; 51. Bearing mounting seat; 511. Bearing cavity; 512. Annular groove; 52. Bearing cover; 6. Sealing ring; 7. Cooling fan; 8. Shell; 9. Fixing plate; 10. Bolts. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the technical solution of the utility model embodiment in conjunction with the accompanying drawings and specific embodiments of the specification. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should be the usual meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation to this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The words “include” or “comprising” and the like used in the description of this application mean that the elements or objects preceding the words include the elements or objects listed after the words and their equivalents, but do not exclude other elements or objects.

[0027] It should also be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection 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, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0028] like Figures 1 to 4As shown, the square electric grinder of this embodiment includes a square shell 4, a motor 1, an eccentric block 2 and a grinding disc mounting plate 3 for mounting a grinding disc, the motor 1 is mounted on the square shell 4, the eccentric block 2 is mounted on the rotating shaft 11 of the motor 1, the grinding disc mounting plate 3 is movably mounted on the square shell 4, and the inner side wall of the grinding disc mounting plate 3 abuts against the outer side wall of the eccentric block 2.

[0029] The eccentric block 2 is driven by the motor 1 to rotate eccentrically, thereby pushing the grinding disc mounting plate 3 to reciprocate along the radial direction of the rotating shaft 11 of the motor 1, so that the grinding disc on the grinding disc mounting plate 3 can grind and polish the workpiece to be processed. It has the advantages of sufficient power and high grinding efficiency. At the same time, the eccentric block 2 is used to drive the grinding disc to do reciprocating motion, so that the grinding trajectory can be more stable and the grinding texture can be more uniform. In addition, the motor 1 drive has less noise than the pneumatic drive.

[0030] Optional, such as Figure 5 As shown, the eccentric block 2 includes a cylindrical base 21 and an eccentric cylinder 22 fixed on the base 21 . The eccentric cylinder 22 is provided with a cylindrical hole 221 which is offset from the axis, and the rotating shaft 11 of the motor 1 is inserted into the cylindrical hole 221 .

[0031] The base 21 is a semi-cylinder coaxial with the eccentric cylinder 22. The base 21 is also provided with an arc plate arranged along the edge. The outer wall of the arc plate abuts against the inner wall of the grinding disc mounting plate 3. A through hole is provided at the bottom of the cylindrical hole 221. A threaded hole corresponding to the through hole is provided at the end of the rotating shaft 11 of the motor 1. When the rotating shaft 11 is inserted into the cylindrical hole 221 of the eccentric block 2, a bolt is passed through the through hole and threadedly connected with the threaded hole, thereby fixing the eccentric block 2 in place. The eccentric block 2 is mounted on the rotating shaft 11 so that it can rotate with the rotating shaft 11. When the eccentric block 2 rotates with the rotating shaft 11, since the cylindrical hole 221 deviates from the axis of the eccentric cylinder 22, the axis of the rotating shaft 11 is offset from the axis of the eccentric cylinder 22, and the axis of the base 21 is also correspondingly offset from the axis of the rotating shaft 11. When the rotating shaft 11 rotates 1, the eccentric block 2 pushes the grinding disc mounting plate 3 to reciprocate along the radial direction of the rotating shaft 11 of the motor 1.

[0032] Optionally, the square electric grinder also includes a bearing 5 and a bearing mounting seat 51, the bearing 5 is mounted on the bearing mounting seat 51, the bearing mounting seat 51 is fixedly mounted on the grinding disc mounting plate 3, the inner ring of the bearing 5 abuts the outer ring of the eccentric cylinder 22, and the outer wall of the base 21 abuts the inner wall of the bearing mounting seat 51.

[0033] The inner ring of the bearing 5 abuts against the outer ring of the eccentric cylinder 22, and the outer ring is installed on the bearing mounting seat 51, which is used to reduce the friction of the rotation of the eccentric mass 2. When the eccentric mass 2 rotates, it drives the bearing mounting seat 51 to reciprocate along the radial direction of the rotating shaft 11 of the motor 1, thereby causing the grinding disc mounting plate 3 fixedly connected to the bearing mounting seat 51 to follow the movement.

[0034] Specifically, Figure 6 As shown, the bearing mounting seat 51 includes a bearing cavity 511 for mounting the bearing 5 , and an annular groove 512 is provided on the outer side of the bearing cavity 511 . The annular groove 512 is used to set the base 21 and make the outer side wall of the base 21 abut against the side wall of the annular groove 512 .

[0035] The bearing cavity 511 is used to install the bearing 5, and the annular groove 512 constitutes a rotating space for the arc plate of the base 21 of the eccentric block 2. When the eccentric block 2 rotates eccentrically, the arc plate of the base 21 of the eccentric block 2 applies centrifugal thrust to the side wall of the annular groove 512, thereby pushing the bearing mounting seat 51 to reciprocate along the radial direction of the rotating shaft 11 of the motor 1.

[0036] In some embodiments, a bearing cover 52 for preventing the bearing mounting seat 51 from axially moving is further provided above the bearing mounting seat 51 , and a through hole for the rotating shaft 11 of the motor 1 to pass through is provided on the bearing cover 52 .

[0037] During grinding processing, the bearing cover 52 is fixedly mounted on the rotating shaft 11 and is located above the bearing cover 52. The bearing mounting seat 51 is pressed by the bearing cover 52, which can effectively prevent the grinding disc mounting plate 3 and the bearing mounting seat 51 from moving axially along the rotating shaft 11, thereby ensuring safety during processing.

[0038] In some embodiments, a sealing ring 6 is provided between the grinding disc mounting plate 3 and the square housing 4 .

[0039] A accommodating cavity for accommodating the eccentric block 2, the bearing 5, the bearing mounting seat 51 and the bearing pressure cover 52 is formed between the grinding disc mounting plate 3 and the square shell 4. In order to prevent the grinding liquid from entering the accommodating cavity during the grinding process, a sealing ring 6 is arranged between the grinding disc mounting plate 3 and the square shell 4. The sealing ring 6 is specifically a T-shaped sealing ring, the upper end plane of which abuts the square shell 4, and the lower end is arranged in the square groove of the grinding disc mounting plate 3, and the width of the square groove is larger than the width of the part of the T-shaped sealing ring located in the square groove, so that the sealing ring 6 will not affect the reciprocating motion of the grinding disc mounting plate 3.

[0040] In some embodiments, a cooling fan 7 is also provided on the rotating shaft 11 of the motor 1. The cooling fan 7 is used to dissipate heat for the motor 1. The motor 1 can rotate together with the rotating shaft 11 of the motor 1. When the motor 1 rotates, air is blown toward the motor 1 to dissipate heat for the motor 1.

[0041] In some embodiments, the square electric grinder further includes a housing 8 mounted on the square shell 4 , and the motor 1 is disposed in the housing 8 .

[0042] The housing 8 is fixedly mounted on the square housing 4 and is coaxial with the motor 1 to protect the motor.

[0043] Optionally, a fixing plate 9 is also included, and the outer shell 8 and the motor 1 are fixedly connected to the fixing plate 9, the fixing plate 9 is arranged on the top of the outer shell 8 and the motor 1, the motor 1 is fixedly installed on the fixing plate 9, the fixing plate 9 is fixedly connected to the outer shell 8, and the outer shell 8 is fixedly installed on the square shell 4, so that the motor 1, the square shell 4, the outer shell 8 and the fixing plate 9 form a stable structure.

[0044] Specifically, in this embodiment, the housing 8 and the motor 1 are connected to the fixing plate 9 by bolts 10 for easy assembly and disassembly. In other embodiments, they can also be connected by any other means that can achieve fixed connection, such as welding.

[0045] The square electric grinder provided in the above embodiment of the present application has at least the following characteristics:

[0046] 1. Directly use motor drive, the speed is controllable (directly specify the speed according to different processes to achieve intelligent control).

[0047] 2. The motor is quiet when running, and the noise is controlled below 45 decibels.

[0048] 3. The motor can be monitored in real time when working, without manual troubleshooting, and can achieve automation and intelligence.

[0049] 4. The motor speed can reach 10000N / min, which improves the grinding efficiency.

[0050] 5. Through the cooperation of the eccentric block 2 and the grinding mounting plate, the grinding and polishing track is more stable and the grinding and polishing texture is more uniform.

[0051] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A square electric grinder, characterized in that: The invention comprises a square housing (4), a motor (1), an eccentric block (2) and a grinding disc mounting plate (3) for mounting a grinding disc, wherein the motor (1) is mounted on the square housing (4), the eccentric block (2) is mounted on a rotating shaft (11) of the motor (1), and the grinding disc mounting plate (3) is movably mounted on the square housing (4), and the inner side wall of the grinding disc mounting plate (3) abuts against the outer side wall of the eccentric block (2).

2. A square electric grinder according to claim 1, characterized in that: The eccentric block (2) comprises a cylindrical base (21) and an eccentric cylinder (22) fixed on the base (21); the eccentric cylinder (22) is provided with a cylindrical hole (221) deviating from the axis, and the rotating shaft (11) of the motor (1) is inserted into the cylindrical hole (221).

3. A square electric grinder according to claim 2, characterized in that: It also comprises a bearing (5) and a bearing mounting seat (51), wherein the bearing (5) is mounted on the bearing mounting seat (51), and the bearing mounting seat (51) is fixedly mounted on the grinding disc mounting plate (3), the inner ring of the bearing (5) abuts against the outer ring of the eccentric cylinder (22), and the outer side wall of the base (21) abuts against the inner side wall of the bearing mounting seat (51).

4. A square electric grinder according to claim 3, characterized in that: The bearing mounting seat (51) comprises a bearing cavity (511) for mounting the bearing (5), and a circle of annular grooves (512) are arranged on the outside of the bearing cavity (511). The annular grooves (512) are used to set the base (21) and make the outer side wall of the base (21) abut against the side wall of the annular groove (512).

5. A square electric grinder according to claim 3, characterized in that: A bearing pressure cover (52) for preventing the bearing mounting seat (51) from axially moving is also provided above the bearing mounting seat (51), and a through hole for the rotating shaft (11) of the motor (1) to pass through is provided on the bearing pressure cover (52).

6. A square electric grinder according to claim 1, characterized in that: A sealing ring (6) is provided between the grinding disc mounting plate (3) and the square housing (4).

7. A square electric grinder according to claim 1, characterized in that: A cooling fan (7) is also provided on the rotating shaft (11) of the motor (1), and the cooling fan (7) is used to dissipate heat for the motor (1).

8. A square electric grinder according to claim 1, characterized in that: It also includes a housing (8) mounted on the square housing (4), and the motor (1) is arranged in the housing (8).

9. A square electric grinder according to claim 8, characterized in that: It also comprises a fixing plate (9), and the housing (8) and the motor (1) are both fixedly connected to the fixing plate (9).

10. A square electric grinder according to claim 9, characterized in that: The housing (8) and the motor (1) are both connected to the fixing plate (9) via bolts (10).

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