Oil throwing structure of angle grinder

Abstract

The oil throwing structure of the angle grinder comprises a machine body shell, and a first bevel gear and a second bevel gear which are rotationally connected with the machine body shell are arranged in the machine body shell; the first bevel gear and the second bevel gear are meshed with each other, and the second bevel gear is arranged below the first bevel gear; the outer layer of a shaft sleeve of the second bevel gear is sleeved with a spiral guide piece, and the spiral guide piece and the second bevel gear are coaxially arranged. When the first bevel gear and the second bevel gear rotate in a meshed mode, grease below the second bevel gear is thrown to the position above the second bevel gear along the spiral guiding piece. The spiral guide piece is arranged on the second bevel gear on the lower portion, grease is thrown from the lower portion of the second bevel gear to the upper portion of the second bevel gear through the spiral guide piece, and therefore the first bevel gear and the second bevel gear are fully lubricated.

Description

Technical Field

[0001] The utility model belongs to the technical field of angle grinders, and particularly relates to an oil slinging structure of an angle grinder. Background Art

[0002] An angle grinder is a commonly used grinding tool. When the angle grinder works, a grinding disc is driven to rotate by a motor. Generally, existing angle grinders include two meshing and rotating bevel gears. When the motor works, it drives one of the bevel gears to rotate, and then the other bevel gear rotates synchronously, so that the grinding disc rotates continuously. Since the two bevel gears are usually in a high-speed rotation state when the angle grinder is working, grease needs to be added between the two bevel gears for lubrication. Since the two bevel gears are often arranged side by side up and down, the grease often accumulates on the lower bevel gear, resulting in poor lubrication effect between the two bevel gears. Therefore, it is necessary to design an oil slinging structure of an angle grinder to overcome the above difficulties. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the utility model designs an oil slinging structure of an angle grinder. The utility model sets a spiral guide on the lower second bevel gear, and the grease is slung from the lower part of the second bevel gear to the upper part of the second bevel gear through the spiral guide, so as to fully lubricate the first bevel gear and the second bevel gear.

[0004] The invention purpose of the utility model is realized by the following technical scheme: an oil slinging structure of an angle grinder, including a body housing, in which a first bevel gear and a second bevel gear rotatably connected thereto are arranged; the first bevel gear and the second bevel gear are meshed with each other, and the second bevel gear is arranged below the first bevel gear; a spiral guide is sleeved on the outer layer of the shaft sleeve of the second bevel gear, and the spiral guide and the second bevel gear are coaxially arranged; when the first bevel gear and the second bevel gear rotate meshingly, the grease below the second bevel gear is slung to the upper part of the second bevel gear along the spiral guide.

[0005] Preferably, a first transmission shaft rotatably connected to the body housing is arranged in the body housing, and the first bevel gear synchronously rotating with the first transmission shaft is arranged on the first transmission shaft; a second transmission shaft rotatably connected to the body housing is further arranged in the body housing, and a first bearing is arranged between the second transmission shaft and the body housing; the second bevel gear synchronously rotating with the second transmission shaft is arranged on the second transmission shaft, and the first transmission shaft and the second transmission shaft are arranged perpendicular to each other.

[0006] The first transmission shaft is connected to a motor, which is not shown in the drawings; when the motor works, it drives the first transmission shaft and the first bevel gear to rotate, and the rotation of the first bevel gear drives the second bevel gear to rotate.

[0007] Preferably, the fuselage housing includes an upper housing and a lower housing, which are fixed by screws; the lower housing is provided with a limiting groove, and a first bearing is arranged in the limiting groove; the bottom of the second bevel gear abuts against the first bearing.

[0008] By providing the upper housing and the lower housing, it is convenient to install components; by providing the limiting groove, it is convenient to position the first bearing.

[0009] Preferably, a first snap ring for limiting is arranged on the upper end face of the second bevel gear; the first snap ring is installed on the second transmission shaft, and a first card slot for installing the first snap ring is arranged on the second transmission shaft; a washer is arranged between the first snap ring and the end face of the second bevel gear. By providing the first snap ring and the washer, axial positioning of the second bevel gear is achieved.

[0010] Preferably, an annular card slot is arranged on the bushing of the second bevel gear, and a spiral guide is arranged in the annular card slot; the spiral guide is a spiral spring; a first bearing is arranged below the second bevel gear, one pin of the spiral spring is arranged towards the first bearing, and the other pin of the spiral spring is arranged towards the edge of the second bevel gear; the body of the spiral spring is stuck in the annular card slot.

[0011] The spiral spring has elasticity, so that the spiral spring can be firmly installed in the annular card slot; one pin of the spiral spring is arranged towards the first bearing, so that the grease between the first bearing and the fuselage housing will be thrown onto the spiral spring; then the grease will be thrown along one of the pins of the spiral spring onto the body of the spiral spring and the other pin of the spiral spring.

[0012] Preferably, an annular gap is arranged between the second bevel gear and the fuselage housing, and the grease on the spiral guide is thrown along the annular gap onto the upper end face of the second bevel gear when the second bevel gear rotates. When the grease is thrown onto the pin of the spiral spring arranged towards the edge of the second bevel gear, the grease will be thrown upwards along the annular gap, so as to be thrown onto the upper end face of the second bevel gear; due to the high-speed rotation of the second bevel gear, the grease on the upper end face of the second bevel gear will fully lubricate the first bevel gear.

[0013] Preferably, a through hole is arranged on the body of the second bevel gear, and the through hole is arranged towards the spiral guide; the grease on the spiral guide is thrown along the through hole onto the upper end face of the second bevel gear when the second bevel gear rotates. When the grease is thrown onto the body of the spiral spring, the grease is thrown onto the upper end face of the second bevel gear along the through hole; due to the high-speed rotation of the second bevel gear, the grease on the upper end face of the second bevel gear will fully lubricate the first bevel gear.

[0014] Preferably, a grinding disc that rotates synchronously with the second transmission shaft is arranged at the end of the second transmission shaft, and a protective cover assembly is arranged on the outer layer of the grinding disc.

[0015] Preferably, the protective cover assembly includes a protective cover body, a clamp, a locking pin shaft and a handle; a clamp is provided on the upper end surface of the protective cover body, and the clamp is sleeved and installed on the outer layer of the fuselage shell; a locking pin shaft is provided at the open end of the clamp, and a handle rotatably connected thereto is provided at the end of the locking pin shaft; a rotating pin shaft connecting the two is provided between the rotating part of the handle and the locking pin shaft, and the rotating pin shaft and the rotating part of the handle are eccentrically arranged.

[0016] In the default state, the protective cover assembly is in a locked state, and the protective cover body cannot rotate relative to the fuselage shell. One end of the locking pin shaft is fixedly installed on the clamp, and the other end of the locking pin shaft penetrates through the clamp; due to the eccentric arrangement of the rotating pin shaft and the rotating part of the handle, when the handle is rotated, the rotating part of the handle will squeeze the clamp, and the open end of the clamp will tighten, so that the clamp can hold the fuselage shell tightly. When unlocking is required, rotate the handle in the reverse direction, and the open end of the clamp will open, so that the clamp will be in a loose and unlocked state.

[0017] Compared with the prior art, the utility model has the following beneficial effects: 1. The first bevel gear and the second bevel gear are arranged side by side up and down, so that when the two are meshed and driven, the grease can fully lubricate the first bevel gear and the second bevel gear; 2. By arranging the spiral guide, the grease in the fuselage shell is guided to ensure that the grease can be thrown from below the second bevel gear to above the second bevel gear, so as to fully lubricate the first bevel gear and the second bevel gear; 3. Since the spiral guide and the second bevel gear are coaxially arranged, when the second bevel gear rotates, it can synchronously drive the spiral guide to rotate stably, so that the grease is more evenly thrown, and the grease can fully contact the first bevel gear and the second bevel gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the utility model;

[0019] Figure 2 is an internal structure diagram of the utility model;

[0020] Figure 3 is an exploded view of the utility model

[0021] Figure 4 is an internal structure diagram of the lower part of the shell;

[0022] Figure 5 is an exploded view of the protective cover assembly;

[0023] Figure 6 is a perspective view of the second bevel gear;

[0024] Markings in the figure: 1. Body housing; 101. Upper part of the housing; 102. Lower part of the housing; 2. First bevel gear; 3. Second bevel gear; 4. Spiral guide; 5. First transmission shaft; 6. Second transmission shaft; 7. First bearing; 8. Limiting groove; 9. First circlip; 10. First clamping groove; 11. Washer; 12. Annular clamping groove; 13. Annular gap; 14. Through hole; 15. Grinding disc; 16. Protective cover assembly; 161. Protective cover body; 162. Clamp; 163. Locking pin shaft; 164. Handle; 165. Rotating pin shaft. Detailed implementation mode

[0025] The present utility model will be further described below in conjunction with the embodiments shown in the drawings:

[0026] As Figures 1 to 6 shown, this embodiment discloses an oil throwing structure of an angle grinder, including a body housing 1, in which a first bevel gear 2 and a second bevel gear 3 rotatably connected thereto are provided; the first bevel gear 2 and the second bevel gear 3 are meshed with each other, and the second bevel gear 3 is arranged below the first bevel gear 2; a spiral guide 4 is sleeved on the outer layer of the shaft sleeve of the second bevel gear 3, and the spiral guide 4 and the second bevel gear 3 are coaxially arranged; when the first bevel gear 2 and the second bevel gear 3 are meshed and rotated, the grease below the second bevel gear 3 is thrown above the second bevel gear 3 along the spiral guide 4.

[0027] A first transmission shaft 5 rotatably connected to the body housing 1 is provided in the body housing 1, and a first bevel gear 2 synchronously rotated therewith is provided on the first transmission shaft 5; a second transmission shaft 6 rotatably connected to the body housing 1 is further provided in the body housing 1, and a first bearing 7 is provided between the second transmission shaft 6 and the body housing 1; a second bevel gear 3 synchronously rotated therewith is provided on the second transmission shaft 6, and the first transmission shaft 5 and the second transmission shaft 6 are arranged perpendicular to each other. The body housing 1 includes an upper part of the housing 101 and a lower part of the housing 102, and the upper part of the housing 101 and the lower part of the housing 102 are fixed by screws; a limiting groove 8 is provided in the lower part of the housing 102, and a first bearing 7 is provided in the limiting groove 8; the bottom of the second bevel gear 3 abuts against the first bearing 7. A first circlip 9 for limiting is provided on the upper end surface of the second bevel gear 3; the first circlip 9 is installed on the second transmission shaft 6, and a first clamping groove 10 for installing the first circlip 9 is provided on the second transmission shaft 6; a washer 11 is provided between the first circlip 9 and the end surface of the second bevel gear 3.

[0028] An annular clamping groove 12 is provided on the bushing of the second bevel gear 3, and a spiral guide 4 is provided in the annular clamping groove 12; the spiral guide 4 is a spiral spring; a first bearing 7 is provided below the second bevel gear 3, one pin of the spiral spring is arranged towards the first bearing 7, and the other pin of the spiral spring is arranged towards the edge of the second bevel gear 3; the body of the spiral spring is stuck in the annular clamping groove 12. An annular gap 13 is provided between the second bevel gear 3 and the fuselage shell 1. When the second bevel gear 3 rotates, the grease on the spiral guide 4 is thrown along the annular gap 13 onto the upper end face of the second bevel gear 3. A through hole 14 is provided on the body of the second bevel gear 3, and the through hole 14 is arranged towards the spiral guide 4; when the second bevel gear 3 rotates, the grease on the spiral guide 4 is thrown along the through hole 14 onto the upper end face of the second bevel gear 3.

[0029] A grinding disc 15 that rotates synchronously with it is provided at the end of the second transmission shaft 6, and a protective cover assembly 16 is provided on the outer layer of the grinding disc 15. The protective cover assembly 16 includes a protective cover body 161, a clamp 162, a locking pin 163 and a handle 164; a clamp 162 is provided on the upper end face of the protective cover body 161, and the clamp 162 is sleeved and installed on the outer layer of the fuselage shell 1; a locking pin 163 is provided at the open end of the clamp 162, and a handle 164 that is rotatably connected to the end of the locking pin 163 is provided; a rotating pin 165 for connecting the two is provided between the rotating part of the handle 164 and the locking pin 163, and the rotating pin 165 and the rotating part of the handle 164 are eccentrically arranged.

[0030] The specific operation process of this embodiment is as follows. First, install the first bearing 7 and the second transmission shaft 6 in the lower part 102 of the shell, and add grease to the cavity of the lower part 102 of the shell and the first bearing 7; then install the second bevel gear 3 on the second transmission shaft 6; then install the parts in the upper part 101 of the shell, and fix the upper part 101 and the lower part 102 of the shell together. When the motor works, it drives the first transmission shaft 5 to rotate. When the first transmission shaft 5 rotates, the first bevel gear 2 rotates synchronously. When the first bevel gear 2 rotates, it drives the second bevel gear 3 to rotate synchronously; when the second bevel gear 3 rotates at a high speed, the grease is thrown onto the spiral guide 4; then the grease is thrown from below the second bevel gear 3 to above the second bevel gear 3 along the spiral guide 4; here, a part of the grease is thrown from bottom to top through the through hole 14, and the other part of the grease is thrown from bottom to top through the annular gap 13. In this way, a large amount of grease is thrown onto the upper end face of the second bevel gear 3, so as to fully lubricate the first bevel gear 2 and the second bevel gear 3.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. An oil-spinning structure for an angle grinder, comprising a body shell (1), characterized in that: A first bevel gear (2) and a second bevel gear (3) are provided in the body shell (1) and are rotatably connected thereto; the first bevel gear (2) and the second bevel gear (3) are meshed with each other, and the second bevel gear (3) is arranged below the first bevel gear (2); a spiral guide piece (4) is sleeved on the outer layer of the shaft sleeve of the second bevel gear (3), and the spiral guide piece (4) and the second bevel gear (3) are coaxially arranged; when the first bevel gear (2) and the second bevel gear (3) are meshed and rotated, grease below the second bevel gear (3) is thrown along the spiral guide piece (4) to the top of the second bevel gear (3).

2. The oil-spinning structure of the angle grinder according to claim 1, characterized in that: A first transmission shaft (5) rotatably connected to the body shell (1) is provided in the body shell (1), and a first bevel gear (2) rotatably connected to the body shell (1) is provided on the first transmission shaft (5); a second transmission shaft (6) rotatably connected to the body shell (1) is further provided in the body shell (1), and a first bearing (7) is provided between the second transmission shaft (6) and the body shell (1); a second bevel gear (3) rotatably connected to the body shell (6), and the first transmission shaft (5) and the second transmission shaft (6) are arranged perpendicular to each other.

3. The oil-spinning structure of the angle grinder according to claim 2, characterized in that: The body shell (1) comprises an upper shell part (101) and a lower shell part (102), wherein the upper shell part (101) and the lower shell part (102) are fixed by screws; the lower shell part (102) is provided with a limiting groove (8), and a first bearing (7) is provided in the limiting groove (8); and the bottom of the second bevel gear (3) abuts against the first bearing (7).

4. The oil-spinning structure of the angle grinder according to claim 3, characterized in that: The upper end surface of the second bevel gear (3) is provided with a first retaining spring (9) for limiting position; the first retaining spring (9) is mounted on the second transmission shaft (6), and the second transmission shaft (6) is provided with a first retaining groove (10) for mounting the first retaining spring (9); a washer (11) is provided between the first retaining spring (9) and the end surface of the second bevel gear (3).

5. The oil-spinning structure of the angle grinder according to claim 2, characterized in that: An annular groove (12) is provided on the shaft sleeve of the second bevel gear (3), and a spiral guide member (4) is provided in the annular groove (12); the spiral guide member (4) is a spiral spring; a first bearing (7) is provided below the second bevel gear (3), one pin of the spiral spring is arranged toward the first bearing (7), and another pin of the spiral spring is arranged toward the edge of the second bevel gear (3); the body of the spiral spring is clamped in the annular groove (12).

6. The oil-spinning structure of the angle grinder according to claim 5, characterized in that: An annular gap (13) is provided between the second bevel gear (3) and the body shell (1), and when the second bevel gear (3) rotates, grease on the spiral guide (4) is thrown along the annular gap (13) onto the upper end surface of the second bevel gear (3).

7. The oil-spinning structure of the angle grinder according to claim 5, characterized in that: A through hole (14) is provided on the body of the second bevel gear (3), and the through hole (14) is arranged toward the spiral guide member (4); when the second bevel gear (3) rotates, grease on the spiral guide member (4) is thrown along the through hole (14) to the upper end surface of the second bevel gear (3).

8. The oil-spinning structure of the angle grinder according to claim 2, characterized in that: The end of the second transmission shaft (6) is provided with a grinding disc (15) which rotates synchronously therewith, and the outer layer of the grinding disc (15) is provided with a protective cover assembly (16).

9. The oil-spinning structure of the angle grinder according to claim 8, characterized in that: The protective cover assembly (16) comprises a protective cover body (161), a clamp (162), a locking pin (163) and a handle (164); the upper end surface of the protective cover body (161) is provided with a clamp (162), and the clamp (162) is sleeved and mounted on the outer layer of the fuselage shell (1); the opening end of the clamp (162) is provided with a locking pin (163), and the end of the locking pin (163) is provided with a handle (164) rotatably connected thereto; a rotating pin (165) is provided between the rotating part of the handle (164) and the locking pin (163) to connect the two, and the rotating pin (165) and the rotating part of the handle (164) are eccentrically arranged.

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