Driving structure and handheld driving tool thereof

Abstract

The utility model relates to the technical field of electric tools, in particular to a handheld driving tool with the driving structure, which comprises the driving structure, a power supply, a casing and a power switch, and the power supply is arranged in the casing and electrically connected with the power switch and a driving motor of the driving structure. A transmission connecting shaft of the driving structure extends out of the shell, a brush head or a stirring head is installed at the front end of the transmission connecting shaft, and an inner shell is installed on a motor connecting piece at the top of the driving motor. The utility model has the beneficial effects that the driving motor drives the transmission shaft through the two layers of planetary gear sets, the transmission shaft drives the transmission connecting shaft to rotate quickly, and the two layers of planetary gears can improve the rotating efficiency, reduce the influence of resistance and greatly reduce the noise at the same time; the top of the transmission connecting shaft is of an easy-to-plug structure, and the transmission connecting shaft is inserted into the brush head or the stirring head through the connecting clamping hook very conveniently and rapidly.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and more specifically, to a drive structure and its handheld drive tool. Background Technology

[0002] In daily life, we frequently use appliances such as egg beaters and electric cup washers. Because existing egg beaters and electric cup washers have similar structures, multi-functional all-in-one machines integrating various functions have emerged. These machines typically include a housing, a motor, and a rotating component. The motor is housed within the housing, and one end of the rotating component is connected to the motor's output shaft. The rotating component can be a brush head or a mixing head. Depending on the needs, simply replacing the rotating component allows it to be adapted to various usage scenarios.

[0003] In view of the aforementioned deficiencies in the structure of handheld drive tools, and adhering to the spirit of research, innovation, and continuous improvement, the applicant, combined with production practice and using professional and scientific methods, proposes a practical solution and therefore submits this application. Utility Model Content

[0004] The purpose of this invention is to provide a drive structure and its handheld drive tool that, in view of the current state of the technology, can more effectively realize the rotation of the motor and has a more reasonable structural design.

[0005] A drive structure includes: a drive motor, a planetary gear set, an inner housing, a transmission connecting shaft, and a transmission shaft. The drive motor's rotating shaft drives the planetary gear set to rotate. The planetary gear set is connected to the transmission shaft and drives the transmission shaft to rotate. The transmission connecting shaft is mounted on the transmission shaft, and the transmission shaft drives the transmission connecting shaft to rotate. The planetary gear set is surrounded by an inner housing, and the inner housing has a ring of internal teeth that mesh with the planetary gears of the planetary gear set.

[0006] Specifically, the planetary gear set consists of an upper planetary gear set and a lower planetary gear set. The upper planetary gear set is located on top of the lower planetary gear set and is connected to each other. The lower planetary gear set is connected to the shaft of the drive motor, and the top of the upper planetary gear set is connected to the transmission shaft.

[0007] Specifically, the upper planetary gear set consists of planetary gears, an upper planetary transmission carrier, and an upper planetary mounting base. At least two planetary gears are arranged around the central axis of the upper planetary transmission carrier. The upper planetary transmission carrier is mounted on the upper planetary mounting base, and the top of the upper planetary mounting base is provided with a cylinder for inserting the transmission shaft.

[0008] Specifically, the lower planetary gear set consists of a transmission gear, planetary gears, a lower planetary transmission carrier, and a lower planetary mounting base. The lower planetary transmission carrier is mounted on the lower planetary mounting base, the transmission gear is mounted on the central axis of the lower planetary mounting base, and at least two planetary gears are arranged around the transmission gear and mesh with it. The drive motor shaft is fitted with the transmission gear and drives the transmission gear to rotate.

[0009] Specifically, the lower planetary gear carrier is equipped with a central gear, which is fixed to the top of the lower planetary gear carrier. The central gear extends into the upper planetary gear set and meshes with the planetary gears of the upper planetary gear set.

[0010] Specifically, the drive shaft is a square shaft, which is inserted into a square hole in a cylinder. The drive shaft is made of stainless steel square shaft body, which makes the transmission stable, improves its wear resistance, and reduces the rotational resistance of planetary gears.

[0011] In a preferred embodiment, the drive shaft has a square cross-section with sides of 2.5 mm. The internal gears inside the inner housing consist of 31 teeth, the planetary gears inside the planetary gear set have 11 teeth, and the transmission gear and central gear have 8 teeth each. This size design and number of teeth maximize the transmission efficiency of the device, providing high kinetic energy transmission efficiency.

[0012] A handheld driving tool with the aforementioned driving structure includes: a driving structure, a power supply, a housing, and a power switch. The power supply is located inside the housing and electrically connected to the power switch and the drive motor of the driving structure. The transmission shaft of the driving structure extends to the outside of the housing. A brush head or stirring head is installed at the front end of the transmission shaft. The inner housing is mounted on a motor connector on the top of the drive motor. A bearing stabilizer, a gasket, and a silicone sealing ring are sequentially fitted onto the cylinder surrounding the transmission shaft of the driving structure from bottom to top. The use of a high-efficiency, low-energy-consumption motor not only improves cleaning efficiency but also reduces energy consumption and extends battery life. The connection design between the drive motor's shaft and rotating parts is more robust, avoiding loosening and detachment. The bearing stabilizer further improves stability, keeping the transmission shaft and the drive shaft on the same rotating axis to avoid unnecessary shaking, reduce resistance, reduce kinetic energy loss, and improve power utilization. The silicone sealing ring ensures the overall sealing of the structure, preventing residual water droplets from flowing into the tool and affecting its internal operation, achieving an IP7 waterproof rating.

[0013] Specifically, the top edge of the inner housing is provided with a recessed housing positioning groove, the bottom edge of the inner housing is provided with a connecting buckle, the outer edge of the motor connector is provided with a barb, the barb is inserted into the connecting buckle, and the top of the inner side of the outer shell is provided with a protrusion, which is stuck in the housing positioning groove.

[0014] Specifically, the transmission connecting shaft has a recessed groove in the middle of its top, connecting hooks on both outer sides of the top of the groove, and a limiting plane for orientation below the connecting hooks.

[0015] The beneficial effects of this utility model are as follows: the drive motor drives the transmission shaft through a two-layer planetary gear set, which in turn drives the transmission connecting shaft to rotate rapidly. The two-layer planetary gear set can improve rotation efficiency, reduce the impact of resistance, and greatly reduce noise. The top of the transmission connecting shaft adopts an easy-to-plug structure, which can be inserted into the brush head or stirring head using a connecting hook, which is extremely convenient and quick. The whisk head can be used to quickly whip eggs, cream, etc., saving a lot of stirring time. The cup brush can be used to easily clean various tableware and cups, ensuring thorough cleaning and no residue. Attached Figure Description

[0016] Appendix Figure 1 This is a perspective view of the present utility model;

[0017] Appendix Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Appendix Figure 3 This is a schematic diagram of the drive structure of this utility model;

[0019] Appendix Figure 4 This is a partial perspective view of the driving structure of this utility model;

[0020] Appendix Figure 5 This is a partial cross-sectional view of the drive structure of this utility model;

[0021] Appendix Figure 6 This is a perspective view of the internal shell of this utility model;

[0022] Appendix Figure 7 This is an internal bottom view of the internal shell of this utility model;

[0023] Appendix Figure 8 This is a schematic diagram of the planetary gear set of this utility model;

[0024] Appendix Figure 9 This is a partially enlarged view of the lower planetary gear set of this utility model.

[0025] Description and labeling: Drive structure 1, power supply 2, housing 3, power switch 4, control circuit board 5, connector 6, motor connector 7; Drive motor 11, planetary gear set 12, inner housing 13, transmission connecting shaft 14, transmission shaft 15, bearing stabilizer 16, gasket 17 and silicone sealing ring 18; Upper planetary gear set 121, lower planetary gear set 122, planetary gear 123; Upper planetary transmission frame 1211 and upper planetary fixing seat 1212, cylinder 1213; Lower planetary transmission frame 1221 and lower planetary fixing seat 1222, transmission gear 1223, center gear 1224; Internal gear 131, housing positioning groove 132, connecting buckle 133; Empty groove 141, connecting hook 142, limit flat 143; Locking block 61; Barb 71. Detailed Implementation

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0027] Please see Figures 1 to 9 As shown, a drive structure includes: a drive motor, a planetary gear set, an inner housing, a transmission connecting shaft, and a transmission shaft. The drive motor's rotating shaft drives the planetary gear set to rotate. The planetary gear set is connected to the transmission shaft and drives the transmission shaft to rotate. The transmission connecting shaft is mounted on the transmission shaft, and the transmission shaft drives the transmission connecting shaft to rotate. The planetary gear set is surrounded by an inner housing, and the inner housing has a ring of internal teeth that mesh with the planetary gears of the planetary gear set.

[0028] In the above scheme, the planetary gear set consists of an upper planetary gear set and a lower planetary gear set. The upper planetary gear set is located on top of the lower planetary gear set and is connected to each other. The lower planetary gear set is connected to the shaft of the drive motor, and the top of the upper planetary gear set is connected to the transmission shaft. The internal teeth inside the inner housing consist of 31 teeth, while the planetary gears inside the planetary gear set have 11 teeth, and the transmission gear and the central gear have 8 teeth. Each layer consists of three planetary gears arranged equidistantly around each other. This method makes assembly easier, allows for faster rotation speed, and provides greater torque.

[0029] The upper and lower planetary gear sets are interconnected and drive each other, rotating around the central axis of the planetary gear set. The planetary gears of the entire planetary gear set rotate along the inner wall of the inner housing. Because the planetary gear set adopts a double-layer design structure and is constrained by the inner housing, the planetary gear set rotates more smoothly, the fit between the structures is more compact, there are fewer gaps between them, and the noise and vibration of the equipment are reduced.

[0030] In the above scheme, the upper planetary gear set consists of planetary gears, an upper planetary transmission carrier, and an upper planetary mounting base. At least two planetary gears are arranged around the central axis of the upper planetary transmission carrier. The upper planetary transmission carrier is mounted on the upper planetary mounting base, and the top of the upper planetary mounting base has a cylinder for inserting a transmission shaft. The upper planetary transmission carrier and the upper planetary mounting base are connected to each other by a connecting column. The planetary gears are mounted on the connecting column and can rotate around the connecting column as an axis.

[0031] In the above scheme, the lower planetary gear set consists of a transmission gear, planetary gears, a lower planetary transmission carrier, and a lower planetary mounting base. The lower planetary transmission carrier is mounted on the lower planetary mounting base, and the transmission gear is mounted on the central axis of the lower planetary mounting base. At least two planetary gears are arranged around the transmission gear and mesh with it. The drive motor shaft is fitted with the transmission gear and drives it to rotate. The connection method between the lower planetary transmission carrier and the lower planetary mounting base is the same as that between the upper planetary gear set, which is achieved by interlocking connecting columns.

[0032] In the above scheme, the lower planetary gear carrier is equipped with a central gear, which is fixed to the top of the lower planetary gear carrier. The central gear extends through the upper planetary gear set and meshes with the planetary gears of the upper planetary gear set. The drive shaft is a square shaft, inserted into a square hole in a cylinder, and the cross-sectional dimension of the drive shaft is a square with a side length of 2.5 mm.

[0033] The drive motor drives the planetary gears of the lower planetary gear set to rotate through the transmission gear. While rotating, the planetary gears move along the inner wall of the inner housing and drive the upper planetary gear set to rotate synchronously. The upper planetary gear set then drives the entire transmission connecting shaft to rotate rapidly through the transmission shaft. With the help of different functional plug-ins, the electric tool can perform stirring and cleaning functions.

[0034] A handheld driving tool with the aforementioned driving structure includes: a driving structure, a power supply, a housing, and a power switch. The power supply is located inside the housing and electrically connected to the power switch and the drive motor of the driving structure. The transmission shaft of the driving structure extends to the outside of the housing, and a brush head or stirring head is installed at the front end of the transmission shaft. The inner housing is mounted on a motor connector on top of the drive motor, and the motor connector is mounted on the drive motor. A control circuit board is electrically connected to the power supply, the driving structure, and the power switch. A bearing stabilizer, a gasket, and a silicone sealing ring are sequentially fitted onto the cylinder surrounding the transmission shaft of the driving structure from bottom to top. The multi-functional driving tool has an ergonomic design, providing a comfortable grip and easy operation. The multi-functional driving tool can be equipped with LED indicator lights and other functions to allow users to monitor the device's working status in real time. Furthermore, the device is waterproof and can be used in humid environments. The built-in control circuit board can even be configured with an intelligent control system that can monitor parameters such as resistance and temperature during the cleaning process in real time using sensors, automatically adjusting the motor power and speed to adapt to different cleaning needs.

[0035] In the above-described design, the top edge of the inner housing has a recessed positioning groove, the bottom edge of the inner housing has a connecting buckle, the outer edge of the motor connector has a barb that inserts into the connecting buckle, and the top of the inner side of the outer housing has a protrusion that engages in the positioning groove. The top center of the transmission connecting shaft has a recessed slot, the top two outer sides of the slot have connecting hooks, and below the connecting hooks are a limiting plane for orientation.

[0036] While existing egg beaters and electric cup washers have similar structures, their functions are relatively limited. Users need to purchase multiple devices to meet different cleaning needs, which takes up a lot of storage space. The handheld drive tool of this application can achieve different functions by changing different plugs, such as brush heads of different sizes and shapes, and stirring heads. The plug has two locking blocks inside the hole, with curved edges at both ends. The two locking blocks are symmetrically arranged and correspond to the limiting plane of the transmission connecting shaft. The connecting hook at the top of the transmission connecting shaft engages with the top of the locking block, realizing the assembly of the transmission connecting shaft and the plug.

[0037] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A drive structure comprising: The utility model discloses a drive motor, planetary gear set, internal shell, transmission connecting shaft, transmission shaft, its characterized in that: drive motor's rotating shaft drives planetary gear set to rotate, and planetary gear set is connected to transmission shaft and drives transmission shaft to rotate, and transmission connecting shaft is arranged on transmission shaft, and transmission shaft drives transmission connecting shaft to rotate, and planetary gear set is externally covered with internal shell, and a circle of internal tooth is arranged in the internal shell, and the internal tooth is engaged with the planetary gear of planetary gear set.

2. A drive structure according to claim 1, wherein: The planetary gear set is composed of an upper planetary gear set and a lower planetary gear set, the upper planetary gear set is arranged on the top of the lower planetary gear set and is connected to each other, the lower planetary gear set is connected to the rotating shaft of the drive motor, and the upper planetary gear set is connected to the transmission shaft.

3. A drive structure according to claim 2, wherein: The upper planetary gear set is composed of planetary gears, an upper planetary transmission frame and an upper planetary fixed base, at least two planetary gears are arranged around the central shaft of the upper planetary transmission frame, the upper planetary transmission frame is arranged on the upper planetary fixed base, and a cylinder for inserting the transmission shaft is arranged on the top of the upper planetary fixed base.

4. A drive structure according to claim 3, wherein: The lower planetary gear set is composed of a transmission gear, planetary gears, a lower planetary transmission frame and a lower planetary fixed base, the lower planetary transmission frame is arranged on the lower planetary fixed base, the transmission gear is arranged on the central shaft of the lower planetary fixed base, at least two planetary gears are arranged around the transmission gear and are engaged with the transmission gear, and the transmission gear is sleeved on the rotating shaft of the drive motor and is driven to rotate by the rotating shaft.

5. A drive structure according to claim 4, wherein: The lower planetary transmission frame is provided with a central gear which is fixed on the top of the lower planetary transmission frame and penetrates into the upper planetary gear set and is engaged with the planetary gears of the upper planetary gear set.

6. A drive structure according to claim 5, wherein: The transmission shaft is a square shaft which is inserted into the square hole in the cylinder.

7. A drive structure according to claim 6, wherein: The transmission shaft is a square shaft which is inserted into the square hole in the cylinder.

8. A hand-held drive tool having the drive structure according to any one of claims 1 to 7, comprising: The drive structure, the power supply, the shell, the power switch, the power supply arranged in the shell and electrically connected to the drive motor of the drive structure and the power switch, the transmission connecting shaft of the drive structure extends to the outside of the shell, the front end of the transmission connecting shaft is provided with a brush head or a stirring head, the internal shell is arranged on the motor connecting piece on the top of the drive motor, and the cylinder on the periphery of the transmission shaft of the drive structure is sequentially sleeved with a bearing stabilizer, a gasket and a silica gel sealing ring from bottom to top.

9. A hand-held drive tool according to claim 8, characterized in that: The top edge of the internal shell is provided with a downwardly recessed shell positioning groove, the bottom edge of the internal shell is provided with a connecting buckle, the outer edge of the motor connecting piece is provided with a barb, the barb is inserted into the connecting buckle, the top inside of the shell is provided with a protrusion, and the protrusion is clamped in the shell positioning groove.

10. A hand-held drive tool according to claim 8, characterized in that: The top of the transmission connecting shaft is provided with a downwardly recessed groove, the two outer sides of the top of the groove are provided with connecting clamps, and the lower side of the connecting clamps is provided with a limiting plane for orientation.

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