Handheld electric grinder convenient to use for long time

Abstract

The handheld electric grinder convenient to use for a long time comprises a machine head used for installing a motor, a grip used for installing a control system and a flexible connecting piece used for buffering, and the machine head and the grip are connected through the flexible connecting piece. Compared with a traditional machine head and a traditional grip which are rigidly connected, according to the technical scheme, the machine head and the grip are flexibly connected through the flexible connecting piece, vibration generated during cutting or polishing of the machine head can be buffered and absorbed through the rubber sleeve, vibration needing to be borne by the grip can be greatly reduced, and the service life of the machine head is prolonged. According to the electric grinder, vibration borne by an operator in the process of using the electric grinder is small, the hands of the operator are not prone to fatigue, the electric grinder can be used for a long time, and the working efficiency under the condition that the electric grinder needs to be used for a long time is improved.

Description

Technical Field

[0001] The present application relates to the field of handheld electric tools, and in particular to a handheld electric grinder that is easy to use and can be used for a long time. Background Art

[0002] The electric grinder, whether it is the fixed dust screen, the connection between the flexible head and the handle, or the easy-to-press buttons, are all optimized for long-term use.

[0003] Electric grinders are usually used to install grinding discs or cutting discs for grinding and cutting workpieces. However, in actual use, the workpiece will generate a reaction force on the electric grinder during the grinding and cutting process, causing the electric grinder to vibrate at high frequency during use, which in turn causes the operator's hands to easily fatigue, making the electric grinder unsuitable for long-term use. Summary of the invention

[0004] In order to solve the problem that traditional electric grinders are not suitable for long-term use because of high-frequency vibration during use, which causes hand fatigue. The present application provides a handheld electric grinder that is easy to use for a long time.

[0005] The present application provides a handheld electric grinder that is easy to use and long-lasting, and adopts the following technical solutions: A handheld electric grinder that is easy to use for a long time comprises a head for mounting a motor, a handle for mounting a control system and a flexible connector for buffering, wherein the head and the handle are connected via the flexible connector.

[0006] Compared with the traditional rigidly connected machine head and handle, the above technical scheme allows the machine head and the handle to be flexibly connected through a flexible connector, so that the vibration generated by the machine head during cutting or grinding can be buffered and absorbed by the rubber sleeve, which can greatly reduce the vibration that the handle needs to withstand, so that the operator is subjected to less vibration during the use of the electric grinder, the operator's hands are less likely to get tired, the electric grinder can be used for a long time, and the work efficiency is improved when the electric grinder needs to be used for a long time.

[0007] Optionally, the flexible connector includes a first buffer sleeve made of rubber and sleeved on the handle, a connecting hole is provided on one end of the handle, a connecting tube is provided on the machine head, the first buffer sleeve extends into the connecting hole to cover the inner wall of the connecting hole, and the connecting tube is connected to the connecting hole through the first buffer sleeve.

[0008] Optionally, a clamping groove is provided on the side wall of the connecting pipe, and a clamping block is provided on the first buffer sleeve in the connecting hole, and the clamping block is clamped in the clamping groove.

[0009] Optionally, the flexible connector further includes a second buffer sleeve, which wraps and covers an end surface of the machine head connected to the handle, and the first buffer sleeve also wraps and covers an end surface of the handle connected to the machine head, and the second buffer sleeve fits tightly against the first buffer sleeve.

[0010] Optionally, a pull ring is provided on the first buffer sleeve, the first buffer sleeve covers one side of the handle, and the pull ring is arranged in a direction away from the first buffer sleeve and tightens the first buffer sleeve onto the handle.

[0011] Optionally, an embedding groove for fitting the first buffer sleeve and the pull ring is formed on the handle, and a side wall of the embedding groove at the pull ring is inclined in a direction away from the first buffer sleeve.

[0012] Optionally, the second buffer sleeve covers one end of the machine head where the motor is mounted.

[0013] Optionally, at least two fixing plates are circumferentially arranged on the second buffer sleeve, the fixing plates are tightly pressed against the side wall of the machine head, the fixing plates are provided with fixing grooves, and the side wall of the machine head is provided with fixing protrusions that are embedded and matched with the fixing grooves.

[0014] Optionally, an air inlet is opened at the tail of the machine head, and a dustproof net and a mounting frame for mounting the dustproof net are arranged at the tail of the machine head, and the mounting frame is connected to the machine head.

[0015] Optionally, an anti-slip protrusion is provided at the handle, and the anti-slip protrusion is located at the start button of the handle, and the first buffer sleeve covers the anti-slip protrusion.

[0016] In summary, in the present application, the second buffer sleeve and the first buffer sleeve cooperate with each other to form a flexible connection between the machine head and the handle. The vibration at the machine head will be absorbed by the second buffer sleeve and the first buffer sleeve, so that the operator will not experience hand fatigue and need to stop work, thereby improving the overall grinding and cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0018] Figure 2 It is a schematic diagram of the three-dimensional mechanism of the present application, in which the second buffer sleeve and the first buffer sleeve are cut.

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the present application, in which the handle is cut away.

[0021] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0022] Figure 6 It is a cross-sectional view of the connection of the handle of the present application.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the first buffer sleeve of the present application.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the first buffer sleeve of the present application without the general pull ring.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the second buffer sleeve of the present application.

[0026] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0027] Figure numerals: 1. Machine head; 11. Connecting pipe; 12. Card slot; 13. Fixing protrusion; 14. Air inlet; 15. Boss; 2. Handle; 21. Embedded groove; 22. Anti-slip protrusion; 23. Connecting hole; 24. Limiting ring; 3. Flexible connector; 4. First buffer sleeve; 41. Pull ring; 42. Card block; 43. Limiting groove; 5. Second buffer sleeve; 51. Fixing plate; 511. Fixing groove; 6. Dust net; 61. Mounting bracket. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-9 This application is described in further detail.

[0029] A handheld electric grinder that is easy to use and can be used for a long time. Figure 1 and Figure 2 , including a machine head 1 for mounting a motor and a main shaft, a handle 2 for mounting a control circuit, and a flexible connector 3 for flexibly connecting the handle 2 and the machine head 1.

[0030] Reference Figure 1 and Figure 2 , wherein the flexible connecting member 3 includes a second buffer sleeve 5 made of rubber and a first buffer sleeve 4 made of rubber, the second buffer sleeve 5 is sleeved on the machine head 1, and the first buffer sleeve 4 is sleeved on the handle 2.

[0031] Reference Figure 4 and Figure 5A connecting portion is integrally provided on the side wall of the machine head 1 for connecting with the handle 2, a connecting tube 11 is integrally provided on the end surface of the connecting portion, and a connecting hole 23 is opened on one end surface of the handle 2 for matching and connecting with the connecting tube 11.

[0032] Reference Figure 5 and Figure 6 The second buffer sleeve 5 covers the end surface of one end of the connection part of the machine head 1 provided with the connection tube 11, and the first buffer sleeve 4 covers the end surface of one end of the handle 2 provided with the connection hole 23 and the inner wall of the connection hole 23. A clamping block 42 is also integrally provided on the first buffer sleeve 4 located in the connection hole 23, and a clamping groove 12 which is embedded and matched with the clamping block 42 is integrally provided on the side wall of the connection tube 11. The connection tube 11 is installed in the connection hole 23 and the outer side wall of the connection tube 11 is tightly fitted with the first buffer sleeve 4 on the side wall of the connection hole 23. The clamping block 42 is clamped in the clamping groove 12 to limit the axial displacement between the connection tube 11 and the handle 2, and the second buffer sleeve 5 at the end surface of the connection part of the machine head 1 is tightly fitted with the first buffer sleeve 4 at the end surface of the connection end of the handle 2.

[0033] Reference Figure 5 and Figure 6 A limiting groove 43 is also provided on the first buffer sleeve 4 at the connecting hole 23, and a boss 15 is provided at the connection between the connecting pipe 11 and the machine head 1. The radius of the limiting groove 43 is greater than the radius of the connecting hole 23. When the connecting pipe 11 is connected to the connecting hole 23, the boss 15 is embedded in the limiting groove 43 and fits tightly against the bottom of the limiting groove 43.

[0034] Reference Figure 7 and Figure 8 A limiting ring 24 is also integrally provided on the handle 2 at one end of the connecting hole 23 , the first buffer sleeve 4 at the connecting hole 23 fits and covers the limiting ring 24 , and one end of the connecting tube 11 fits and presses against the limiting ring 24 through the first buffer sleeve 4 .

[0035] When a grinding wheel or a cutting wheel is installed on the main shaft of the machine head 1 for grinding, a part of the vibration generated by the machine head 1 will be transmitted through the second buffer sleeve 5 and the first buffer sleeve 4 that are tightly fitted together, and the vibration will be absorbed by the second buffer sleeve 5 and the first buffer sleeve 4. Another part of the vibration generated by the machine head 1 will be transmitted to the first buffer sleeve 4 through the connecting pipe 11, and then absorbed by the first buffer sleeve 4.

[0036] The boss 15 embedded in the limiting groove 43 can better absorb the vibration of the machine head 1, and the connection between the connecting pipe 11 and the machine head 1 is less likely to break.

[0037] Reference Figure 1 and Figure 2The side wall of the handle 2 at the connection end with the machine head 1 is provided with an anti-skid protrusion 22, and the anti-skid protrusion 22 faces the end of the machine head 1 provided with the main shaft. The first buffer sleeve 4 is covered on the anti-skid protrusion 22, and a pressure rod is rotatably installed on the handle 2, and the free end of the pressure rod is used to press the switch button on the handle 2, and the free end of the pressure rod is located at the anti-skid protrusion 22.

[0038] When in use, after the handle 2 is held stably by the anti-slip protrusion 22, the middle finger and the ring finger can easily press the switch button through the pressure rod, which is more stable and comfortable to use.

[0039] Reference Figure 1 and Figure 2 An embedding groove 21 for embedding and installing the first buffer sleeve 4 is opened on the side wall of the handle 2. The first buffer sleeve 4 is embedded in the embedding groove 21. At the same time, a pull ring 41 is also provided on the first buffer sleeve 4. The pull ring 41 extends in a direction away from the connecting hole 23 and the anti-slip protrusion 22, and the pull ring 41 is also embedded in the embedding groove 21.

[0040] Reference Figure 2 and Figure 3 The side wall of the embedding groove 21 at the pull ring 41 is inclined toward the direction away from the connecting hole 23, and the first buffer sleeve 4 at the anti-slip protrusion 22 is tightened by the pull ring 41, and the first buffer sleeve 4 at the anti-slip protrusion 22 is used to limit the first buffer sleeve 4 as a whole, so that the first buffer sleeve 4 is more stable and not easy to loosen.

[0041] At the same time, the handle 2 is symmetrically divided into two parts and fixedly connected by bolts, and the first buffer sleeve 4 is also divided into two symmetrical parts, which makes it more convenient to install the first buffer sleeve 4.

[0042] Reference Figure 2 and Fig. 9 The second buffer sleeve 5 covers one end of the machine head 1 where the motor is installed. A fixing sheet 51 is integrally provided on opposite sides of the second buffer sleeve 5. A fixing groove 511 is provided on the fixing sheet 51. A fixing protrusion 13 that fits in the fixing groove 511 is integrally provided on the side wall of the machine head 1. The fixing protrusion 13 fits in the fixing groove 511 to tighten and fix the second buffer sleeve 5. At the same time, by covering the machine head 1 where the motor is installed, the vibration generated by the motor will be partially absorbed by the second buffer sleeve 5 before being transmitted to the handle 2, further reducing the vibration at the handle 2.

[0043] Reference Figure 2 and Fig. 9At the same time, an air inlet 14 is opened on the side wall of one end of the machine head 1 where the motor is installed. A mounting frame 61 and a dustproof net 6 are arranged inside the machine head 1. The mounting frame 61 is fixed to the inner wall of the machine head 1 by bolts, and the dustproof net 6 is fixedly installed on the mounting frame 61 to block the air inlet 14. When the motor runs at high speed, a large amount of heat will be generated. If the heat accumulates, it may cause damage to the motor and accelerated aging of the second buffer sleeve 5. Therefore, it is necessary to dissipate heat from the motor in time.

[0044] Furthermore, since the second buffer sleeve 5 absorbs part of the vibration of the machine head 1, the mounting frame 61 fixedly installed in the machine head 1 is less likely to loosen.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A handheld electric grinder that is easy to use for a long time, comprising a head (1) for mounting a motor, and a handle (2) for mounting a control system, characterized in that: It also comprises a flexible connection piece (3) for buffering, and the head (1) and the handle (2) are independent of each other and connected via the flexible connection piece (3).

2. A handheld electric grinder that is easy to use for a long time according to claim 1, characterized in that: The flexible connecting member (3) comprises a first buffer sleeve (4) made of rubber and sleeved on the handle (2); a connecting hole (23) is provided on one end of the handle (2); a connecting tube (11) is provided on the machine head (1); the first buffer sleeve (4) extends into the connecting hole (23) to cover the inner wall of the connecting hole (23); and the connecting tube (11) is connected to the connecting hole (23).

3. A handheld electric grinder that is easy to use for a long time according to claim 2, characterized in that: A clamping groove (12) is provided on the side wall of the connecting pipe (11), and a clamping block (42) is provided on the first buffer sleeve (4) in the connecting hole (23), and the clamping block (42) is clamped in the clamping groove (12).

4. A handheld electric grinder that is easy to use for a long time according to claim 1, characterized in that: The flexible connecting member (3) further comprises a second buffer sleeve (5) made of rubber, wherein the second buffer sleeve (5) covers an end surface of the machine head (1) connected to the handle (2), and the first buffer sleeve (4) also covers an end surface of the handle (2) connected to the machine head (1), and the second buffer sleeve (5) fits tightly against the first buffer sleeve (4).

5. The portable electric grinder according to claim 1, characterized in that: A pull ring (41) is provided on the first buffer sleeve (4), the first buffer sleeve (4) covers one side of the handle (2), and the pull ring (41) is arranged in a direction away from the first buffer sleeve (4) and tightens the first buffer sleeve (4) onto the handle (2).

6. A handheld electric grinder that is easy to use for a long time according to claim 5, characterized in that: The handle (2) is provided with an embedding groove (21) for fitting and embedding the first buffer sleeve (4) and the pull ring (41), and the side wall of the embedding groove (21) at the pull ring (41) is inclined in a direction away from the first buffer sleeve (4).

7. The handheld electric grinder that is easy to use for a long time according to claim 4 is characterized in that: The second buffer sleeve (5) covers one end of the machine head (1) on which the motor is mounted.

8. A handheld electric grinder that is easy to use for a long time according to claim 7, characterized in that: At least two fixing plates (51) are circumferentially arranged on the second buffer sleeve (5), the fixing plates (51) are closely fitted against the side wall of the machine head (1), the fixing plates (51) are provided with fixing grooves (511), and the side wall of the machine head (1) is provided with fixing protrusions (13) embedded and matched with the fixing grooves (511).

9. The portable electric grinder according to claim 1, characterized in that: An air inlet (14) is provided at the tail of the machine head (1), and a dustproof net (6) and a mounting frame (61) for mounting the dustproof net (6) are provided at the tail of the machine head (1), wherein the mounting frame (61) is connected to the machine head (1).

10. The portable electric grinder that is easy to use for a long time according to claim 1, characterized in that: The handle (2) is provided with an anti-slip protrusion (22), the anti-slip protrusion (22) is located at the start button of the handle (2), and the first buffer sleeve (4) covers the anti-slip protrusion (22).

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