Electric drill lubricating structure

Abstract

The utility model discloses an electric drill lubricating structure which comprises a machine body, a driving motor and an output shaft are arranged in the machine body, a coupler for connecting the driving motor and the output shaft is arranged between the driving motor and the output shaft, and a lubricating device is arranged between the coupler and the machine body. A positioning bearing for connecting the lubricating device with the coupler is arranged between the lubricating device and the coupler; the lubricating device comprises a feeding channel and an exhaust channel, and a one-way valve assembly is arranged in the feeding channel. The lubricating device further comprises a discharging channel, and a sealing assembly rotationally connected with the discharging channel is arranged at the opening end of the discharging channel. The lubricating device is arranged in the machine body, lubricant can be conveniently and quantitatively added through the feeding channel, the machine body does not need to be disassembled, and the lubricating device is good in lubricating effect and simple and reliable in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric drills, and in particular relates to a lubrication structure for an electric drill. Background Art

[0002] The electric drill is a commonly used electric tool. Generally, the existing electric drills usually include a driving motor, a reduction mechanism and a conveying mechanism. When the driving motor is working, the output mechanism is driven to rotate through the reduction mechanism. Generally, the existing reduction mechanism is usually a planetary gear reduction assembly. After using the electric drill for a long time, the planetary gear reduction assembly usually needs to be lubricated and maintained. Since the general electric drill does not have a built-in lubrication device, it is necessary to disassemble the body separately, and then remove the output mechanism, so as to add lubricant to the planetary reduction assembly for maintenance. The process of adding each time is relatively cumbersome, and the metering of the lubricant added is not easy to control, which affects the transmission effect of the planetary gear reduction assembly. Therefore, it is necessary to design an electric drill lubrication structure to overcome the above difficulties. Summary of the invention

[0003] The utility model designs an electric drill lubrication structure in view of the problems existing in the prior art. The utility model arranges a lubrication device in the machine body, which is convenient for quantitatively adding lubricant through a feed channel without disassembling the machine body. The lubrication device has good lubrication effect and a simple and reliable structure.

[0004] The invention objective of the utility model is achieved through the following technical solutions: an electric drill lubrication structure, comprising a body, a driving motor and an output shaft are arranged in the body, a coupling connecting the driving motor and the output shaft is arranged between the two, a lubrication device is arranged between the coupling and the body; a positioning bearing connecting the two is arranged between the lubrication device and the coupling; the lubrication device comprises a feed channel and an exhaust channel, a one-way valve assembly is arranged in the feed channel; the lubrication device also comprises a discharge channel, and a sealing assembly rotatably connected to the discharge channel is arranged at the open end of the discharge channel.

[0005] Preferably, the lubricating device further comprises a storage chamber, which is connected to the feed channel, the discharge channel and the exhaust channel respectively; the storage chamber is hollow and is mounted on the coupling through a positioning bearing; one end of the coupling is connected to the drive motor, and the other end is connected to the output shaft. The storage chamber is mounted on the coupling through a positioning bearing, so that the storage chamber can remain stationary relative to the machine body when the coupling rotates. By setting up the storage chamber, it is convenient to temporarily add lubricant to the storage chamber.

[0006] Preferably, the end of the coupling facing the drive motor is provided with a first mounting hole, and the end of the coupling facing the output shaft is provided with a second mounting hole; the outer contour of the first mounting hole matches the outer contour of the rotating shaft of the drive motor, and the outer contour of the second mounting hole matches the outer contour of the output shaft; when the drive motor is working, the output shaft is driven to rotate through the coupling. By providing the first mounting hole, it is convenient for the coupling to connect to the motor shaft of the drive motor, and by providing the second mounting hole, it is convenient for the coupling to connect to the output shaft, so that the drive motor can drive the output shaft to rotate when it is working.

[0007] Preferably, an annular protrusion is provided on the outer wall of the coupling, and a plurality of locating bearings are provided on the outer wall of the coupling; the locating bearing arranged close to the output shaft abuts against the annular protrusion; a plurality of retaining springs for positioning are provided between the locating bearing and the coupling; a plurality of first retaining grooves for installing retaining springs are provided on the outer wall of the coupling.

[0008] By providing an annular protrusion, the locating bearing is prevented from being offset relative to the coupling; by providing an installation slot in each of the first slots, the locating bearing is limited and the axial movement of the locating bearing relative to the coupling is prevented, so that the storage chamber can be firmly installed on the outer layer of the coupling through the locating bearing.

[0009] Preferably, the storage chamber and the inner wall of the machine body are arranged to fit each other, a first step for limiting is provided in the machine body, and the side wall of the storage chamber abuts against the first step; the feed channel and the exhaust channel pass through the side wall of the machine body, and the side wall of the machine body is provided with an installation channel for positioning the feed channel and the exhaust channel. By providing the first step, the storage chamber is limited, and the feed channel and the exhaust channel are both installed in the corresponding installation channels, so that the storage chamber can be firmly positioned and installed in the machine body.

[0010] Preferably, the outer wall of the material storage chamber is provided with a plurality of limiting protrusions, and the inner wall of the body is provided with a plurality of limiting grooves; the limiting protrusions are arranged in the limiting grooves, and the outer contours of the limiting protrusions and the outer contours of the limiting grooves match each other. By providing the limiting protrusions and the limiting grooves, the two cooperate with each other to limit the material storage chamber, thereby preventing the material storage chamber from twisting relative to the body.

[0011] Preferably, the feed channel and the exhaust channel are arranged side by side and adjacent to each other, and the opening ends of the feed channel and the exhaust channel are both provided with a sealing cover, which is a rubber piece. By providing the sealing cover, it is convenient to control the conduction state of the feed channel and the exhaust channel, and at the same time, prevent impurities from entering the storage chamber.

[0012] Preferably, the one-way valve assembly includes a positioning bracket and a fan-shaped diaphragm; the positioning bracket is buckled and installed in the feed channel, and the fan-shaped diaphragm is installed on the positioning bracket. When the lubricating material impacts the fan-shaped diaphragm, the fan-shaped diaphragm is deformed relative to the positioning bracket; the positioning bracket is provided with a plurality of guide holes for circulation. By setting the one-way valve assembly, the lubricant can only enter the storage chamber from the feed channel to avoid the backflow of the lubricant. When the lubricant is placed in the injection syringe, the push rod of the injection syringe is pushed, so that the lubricant will squeeze the fan-shaped diaphragm, and the one-way valve assembly is in an open state at this time, so the lubricant will smoothly enter the storage chamber from the guide hole.

[0013] Preferably, the sealing assembly includes a sealing plug, a connecting shaft and a reset torsion spring; a connecting shaft is provided between the sealing plug and the discharge channel to connect the two, and a reset torsion spring is installed on the outer sleeve of the connecting shaft; one pin of the reset torsion spring abuts against the sealing plug, and the other pin of the reset torsion spring abuts against the open end of the discharge channel. In the default state, the sealing assembly is in a closed state. When adding lubricant to the storage chamber, the sealing cover of the exhaust channel is opened, so that the air pressure of the storage chamber is balanced with the outside, and the lubricant can be quickly squeezed into the storage chamber. Since the air pressure of the storage chamber and the outside is balanced at this time, the sealing plug is not squeezed by the gas, and the reset torsion spring is in an elastic deformation state, so that the discharge channel is in a closed state. When it is necessary to add lubricant to the planetary gear reduction assembly, the exhaust channel is closed through the sealing cover, and then the feed channel is pressurized through the injection syringe, so that the pressure in the storage chamber increases, the sealing plug will be squeezed, and the reset torsion spring is further compressed, so that the discharge channel will be in an open state, and the lubricant will enter the planetary gear reduction assembly from the discharge channel. In order to speed up the addition of lubricant, the machine body is often placed upright so that the discharge channel is set vertically and above the planetary gear reduction assembly, so that the lubricant will also accelerate to fall onto the planetary gear reduction assembly under the action of gravity. After the lubricant is added, the sealing plug automatically resets, so that the discharge channel is in a closed state.

[0014] Preferably, a second step is provided on the discharge channel, and a sealing member is provided on the second step; when the sealing plug and the discharge channel are covered, the end face of the sealing plug abuts against the sealing member. By providing the second step, it is convenient to firmly install the sealing member on the second step. By providing the sealing member, the sealing plug can complete the blocking of the discharge channel, and it is convenient to control the on and off state of the discharge channel.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a lubricating device in the body, and the planetary gear reduction assembly can be directly lubricated by the lubricating device. The body cannot be disassembled separately, and the operation is simple and convenient. A feed channel and an exhaust channel are provided on the lubricating device, and the air pressure in the storage chamber is balanced by the exhaust channel, so that the lubricant can be quantitatively added to the storage chamber through the injection syringe. When the lubricant is added to the storage chamber, the sealing plug closes the discharge channel under the action of the reset torsion spring, so as to prevent the lubricant from flowing out of the storage chamber along the discharge channel. When lubrication is required, the exhaust channel is closed, and the feed channel is pressurized by the injection syringe; in this way, the discharge channel opens automatically, and the lubricant can quickly flow to the planetary gear reduction assembly. The operation is simple and convenient, and the lubricant can be quantitatively added, and the adding process is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is the internal structure diagram of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of position A in the middle;

[0019] Figure 4 This is the internal structure diagram of the lubrication device;

[0020] Figure 5 is a three-dimensional diagram of the lubrication device;

[0021] Figure 6 An exploded view of the lubrication device;

[0022] Figure 7 for Figure 6 A partial enlarged view of position B in the middle;

[0023] Figure 8 This is an exploded view of the lubrication device from another perspective;

[0024] Fig. 9 for Figure 8 A partial enlarged view of the C position in the middle;

[0025] Fig.10 This is a diagram of the internal structure of the body;

[0026] Fig.11 is a three-dimensional diagram of the coupling;

[0027] Markings in the figure: 1. Machine body; 2. Driving motor; 3. Output shaft; 4. Coupling; 41. First mounting hole; 42. Second mounting hole; 43. Annular protrusion; 44. First slot; 5. Lubrication device; 6. Positioning bearing; 61. Feed channel; 62. Exhaust channel; 63. Discharge channel; 64. Storage chamber; 65. Limiting protrusion; 7. One-way valve assembly; 71. Positioning bracket; 72. Fan-shaped diaphragm; 73. Guide hole; 8. Sealing assembly; 81. Sealing plug; 82. Connecting shaft; 83. Reset torsion spring; 9. Retaining spring; 10. First step; 11. Limiting groove; 12. Sealing cover; 13. Second step; 14. Seal; 15. Mounting channel; 16. Planetary gear reduction assembly. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0029] like Figures 1 to 11 As shown, this embodiment discloses an electric drill lubrication structure, including a body 1, in which a driving motor 2 and an output shaft 3 are arranged, a coupling 4 connecting the driving motor 2 and the output shaft 3 is arranged between the driving motor 2 and the output shaft 3, a lubrication device 5 is arranged between the coupling 4 and the body 1; a positioning bearing 6 connecting the lubrication device 5 and the coupling 4 is arranged between the lubrication device 5 and the coupling 4; the lubrication device 5 includes a feed channel 61 and an exhaust channel 62, a one-way valve assembly 7 is arranged in the feed channel 61; the lubrication device 5 also includes a discharge channel 63, and the open end of the discharge channel 63 is provided with a sealing assembly 8 rotatably connected thereto.

[0030] The lubricating device 5 further includes a material storage chamber 64, which is connected to the feed channel 61, the discharge channel 63 and the exhaust channel 62 respectively; the material storage chamber 64 is hollow and mounted on the coupling 4 through the positioning bearing 6; one end of the coupling 4 is connected to the drive motor 2, and the other end is connected to the output shaft 3. The end of the coupling 4 facing the drive motor 2 is provided with a first mounting hole 41, and the end of the coupling 4 facing the output shaft 3 is provided with a second mounting hole 42; the outer contour of the first mounting hole 41 matches the outer contour of the rotating shaft of the drive motor 2, and the outer contour of the second mounting hole 42 matches the outer contour of the output shaft 3; when the drive motor 2 is working, the output shaft 3 is driven to rotate through the coupling 4. An annular protrusion 43 is provided on the outer wall of the coupling 4, and a plurality of locating bearings 6 are provided on the outer wall of the coupling 4; the locating bearing 6 arranged close to the output shaft 3 abuts against the annular protrusion 43; a plurality of retaining springs 9 for positioning are provided between the locating bearing 6 and the coupling 4; a plurality of first retaining grooves 44 for installing the retaining springs 9 are provided on the outer wall of the coupling 4.

[0031] The storage chamber 64 and the inner wall of the body 1 are arranged to fit each other, a first step 10 for limiting is provided in the body 1, and the side wall of the storage chamber 64 abuts against the first step 10; the feed channel 61 and the exhaust channel 62 pass through the side wall of the body 1, and the side wall of the body 1 is provided with a mounting channel 15 for positioning the feed channel 61 and the exhaust channel 62. A plurality of limiting protrusions 65 are provided on the outer wall of the storage chamber 64, and a plurality of limiting grooves 11 are provided on the inner wall of the body 1; the limiting protrusions 65 are arranged in the limiting grooves 11, and the outer contours of the limiting protrusions 65 and the outer contours of the limiting grooves 11 match each other.

[0032] The feed channel 61 and the exhaust channel 62 are arranged side by side and adjacent to each other. The open ends of the feed channel 61 and the exhaust channel 62 are both provided with a sealing cover 12, which is a rubber part. The one-way valve assembly 7 includes a positioning bracket 71 and a fan-shaped diaphragm 72; the positioning bracket 71 is snap-fitted in the feed channel 61, and the fan-shaped diaphragm 72 is installed on the positioning bracket 71. When the lubricating material impacts the fan-shaped diaphragm 72, the fan-shaped diaphragm 72 is deformed relative to the positioning bracket 71; the positioning bracket 71 is provided with a plurality of guide holes 73 for circulation. The sealing assembly 8 includes a sealing plug 81, a connecting shaft 82 and a reset torsion spring 83; a connecting shaft 82 is hingedly provided between the sealing plug 81 and the discharge channel 63, and a reset torsion spring 83 is installed on the outer sleeve of the connecting shaft 82; one pin of the reset torsion spring 83 abuts against the sealing plug 81, and the other pin of the reset torsion spring 83 abuts against the open end of the discharge channel 63. The discharge channel 63 is provided with a second step 13 , and a sealing member 14 is provided on the second step 13 ; when the sealing plug 81 and the discharge channel 63 are covered, the end surface of the sealing plug 81 abuts against the sealing member 14 .

[0033] The specific operation process of this embodiment is as follows: when the planetary gear reduction assembly 16 in the body 1 needs to be lubricated, the body 1 is first placed on the table, and then the feed channel 61 and the exhaust channel 62 are in a vertical state, and the sealing cover 12 is opened; then a certain amount of lubricant is extracted through the injection syringe, and the injection syringe is an existing extraction injection device, which is often marked with a scale. Then the injection syringe is connected to the open end of the feed channel 61, and the push rod of the injection syringe is pushed, so that the lubricant will automatically and quickly enter the storage chamber 64. Since the exhaust channel 62 of the storage chamber 64 is in an open state, the air pressure of the storage chamber 64 will be balanced inside and outside, and the sealing assembly 8 will not be squeezed, so the sealing plug 81 will make the discharge channel 63 in a closed state, and the lubricant will gather in the storage chamber 64. After the lubricant is added, the machine body 1 is turned and placed, and the operator holds the machine body 1 with one hand. Here, the discharge channel 63 needs to be in a vertical state, and the discharge channel 63 is above the planetary gear reduction assembly 16. Then the exhaust channel 62 is closed through the sealing cover 12, and the empty injection syringe is connected to the feed channel 61; by pushing the push rod of the injection syringe, the inside of the storage chamber 64 is pressurized, so that the sealing plug 81 is squeezed and opened, and the lubricant will fall along the discharge channel 63 to the planetary gear reduction assembly 16; because the discharge channel 63 is vertically set at this time, the lubricant will also accelerate to fall under the action of gravity, and the addition speed is faster. After the addition is completed, since the storage chamber 64 is not pressurized, the sealing plug 81 automatically resets to close the discharge channel 63.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An electric drill lubrication structure, comprising a body (1), wherein a drive motor (2) and an output shaft (3) are arranged in the body (1), characterized in that: A coupling (4) is provided between the driving motor (2) and the output shaft (3) to connect the two, and a lubricating device (5) is provided between the coupling (4) and the machine body (1); a positioning bearing (6) is provided between the lubricating device (5) and the coupling (4) to connect the two; the lubricating device (5) comprises a feed channel (61) and an exhaust channel (62), and a one-way valve assembly (7) is provided in the feed channel (61); the lubricating device (5) further comprises a discharge channel (63), and a sealing assembly (8) rotatably connected to the discharge channel (63) is provided at an open end of the discharge channel (63).

2. The electric drill lubrication structure according to claim 1, characterized in that: The lubricating device (5) further comprises a material storage chamber (64), the material storage chamber (64) being connected to the feed channel (61), the discharge channel (63) and the exhaust channel (62) respectively; the material storage chamber (64) is hollow and is mounted on the coupling (4) via a positioning bearing (6); one end of the coupling (4) is connected to the drive motor (2), and the other end is connected to the output shaft (3).

3. The electric drill lubrication structure according to claim 2, characterized in that: The end of the coupling (4) facing the drive motor (2) is provided with a first mounting hole (41), and the end of the coupling (4) facing the output shaft (3) is provided with a second mounting hole (42); the outer contour of the first mounting hole (41) matches the outer contour of the rotating shaft of the drive motor (2), and the outer contour of the second mounting hole (42) matches the outer contour of the output shaft (3); when the drive motor (2) is working, the output shaft (3) is driven to rotate through the coupling (4).

4. The electric drill lubrication structure according to claim 3, characterized in that: An annular protrusion (43) is provided on the outer wall of the coupling (4), and a plurality of locating bearings (6) are provided on the outer wall of the coupling (4); the locating bearing (6) arranged close to the output shaft (3) abuts against the annular protrusion (43); a plurality of retaining springs (9) for positioning are provided between the locating bearing (6) and the coupling (4); and a plurality of first retaining grooves (44) for mounting the retaining springs (9) are provided on the outer wall of the coupling (4).

5. The electric drill lubrication structure according to claim 2, characterized in that: The material storage chamber (64) and the inner wall of the machine body (1) are arranged to fit each other; a first step (10) for limiting is provided in the machine body (1), and the side wall of the material storage chamber (64) abuts against the first step (10); the feed channel (61) and the exhaust channel (62) pass through the side wall of the machine body (1); and a mounting channel (15) for positioning the feed channel (61) and the exhaust channel (62) is provided on the side wall of the machine body (1).

6. The electric drill lubrication structure according to claim 5, characterized in that: A plurality of limiting protrusions (65) are provided on the outer wall of the material storage chamber (64), and a plurality of limiting grooves (11) are provided on the inner wall of the machine body (1); the limiting protrusions (65) are arranged in the limiting grooves (11), and the outer contours of the limiting protrusions (65) and the outer contours of the limiting grooves (11) match each other.

7. The electric drill lubrication structure according to claim 1, characterized in that: The feed channel (61) and the exhaust channel (62) are arranged side by side and adjacent to each other. The opening ends of the feed channel (61) and the exhaust channel (62) are both provided with sealing covers (12), and the sealing covers (12) are rubber parts.

8. The electric drill lubrication structure according to claim 1, characterized in that: The one-way valve assembly (7) comprises a positioning bracket (71) and a fan-shaped diaphragm (72); the positioning bracket (71) is snap-fitted into the feed channel (61), and the fan-shaped diaphragm (72) is mounted on the positioning bracket (71); when the lubricating material impacts the fan-shaped diaphragm (72), the fan-shaped diaphragm (72) is deformed relative to the positioning bracket (71); and a plurality of guide holes (73) for circulation are provided on the positioning bracket (71).

9. The electric drill lubrication structure according to claim 1, characterized in that: The sealing assembly (8) comprises a sealing plug (81), a connecting shaft (82) and a return torsion spring (83); a connecting shaft (82) is provided between the sealing plug (81) and the discharge channel (63) to hinge the two, and a return torsion spring (83) is mounted on the outer sleeve of the connecting shaft (82); one pin of the return torsion spring (83) abuts against the sealing plug (81), and the other pin of the return torsion spring (83) abuts against the open end of the discharge channel (63).

10. The electric drill lubrication structure according to claim 9, characterized in that: A second step (13) is provided on the discharge channel (63), and a sealing member (14) is provided on the second step (13); when the sealing plug (81) and the discharge channel (63) are covered, the end surface of the sealing plug (81) abuts against the sealing member (14).

Images