Gear switching device of large-torque electric drill gearbox

Abstract

The utility model relates to a gear shifting device of a large-torque electric drill gearbox, which comprises a front shell, a power source component arranged at the bottom of the front shell, a function shifting component rotationally sleeved in the middle of the front shell, a torsion adjusting component rotationally sleeved at the upper end of the front shell, and an output component rotationally connected in the front shell, the lower end of the output assembly is installed on the power source assembly, the power source assembly comprises a planetary gear set and an inner gear ring, the planetary gear set is fixedly connected with the lower end of the output assembly, and the inner gear ring is connected with the planetary gear set in a meshed mode. After the scheme is adopted, a traditional electric drill gear box structure on the market is optimized, a spring supporting gasket is removed, errors caused by accumulation of internal parts are reduced, then fluctuation of the axial clearance of the gear ring is reduced, an electric drill can provide larger torque, and in addition, the service life of the electric drill gear box is effectively prolonged through the simpler structure.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a gear switching device for a large-torque electric drill gear box. Background Art

[0002] In construction projects, home decoration and maintenance work, electric drills are commonly used as tools. The quality of their performance directly affects work efficiency and work quality. For ease of use, they are usually equipped with screw gears, electric drill gears and impact gears. In situations where high torque impact force is required, impact drills with greater torque are often used to replace traditional electric drills.

[0003] However, due to the particularity of the working environment and torque requirements of high-torque impact drills, the traditional electric drill gearbox structure can no longer meet its requirements. In addition, the complex internal structure can easily cause the electric drill to wear and malfunction during use. The traditional electric drill gearbox structure on the market is equipped with spring support gaskets, which are easily damaged, thus shortening the overall service life of the electric drill gearbox. The accumulation of too many parts can also easily cause the axial clearance of the inner gear ring to fluctuate, resulting in the problem of the inner gear ring clutch disengaging, reducing the accuracy of the electric drill. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a gear switching device for a large-torque electric drill gear box, which optimizes the traditional electric drill gear box structure on the market, removes the spring support gasket, reduces the error caused by the accumulation of internal parts, and thus reduces the fluctuation of the axial clearance of the gear ring, so that the electric drill can provide greater torque. In addition, the more streamlined structure also effectively extends the service life of the electric drill gear box.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] A gear switching device for a high-torque electric drill gearbox, comprising a front shell, a power source component arranged at the bottom of the front shell, a function switching component rotatably sleeved in the middle of the front shell, a torque adjustment component rotatably sleeved on the upper end of the front shell, and an output component rotatably connected to the front shell, wherein the lower end of the output component is mounted on the power source component, the power source component comprises a planetary gear set and an inner gear ring, the planetary gear set is fixedly connected to the lower end of the output component, the inner gear ring is meshed with the planetary gear set, the inner gear ring is mounted in the front shell, a first boss is fixedly arranged on the inner gear ring, a groove is arranged on the front shell, the function switching component comprises a function cup, an adjustment gasket, a gear jump gasket, a ball stud and an impact group The cam is fixedly provided with a second boss on the lower end of the adjusting gasket, and the functional cup is fixedly sleeved on the adjusting gasket; the gear-jumping gasket is slidably provided on the front shell and is located below the adjusting gasket; the gear-jumping gasket is fixedly provided with a first notch, and the first notch can correspond to the second boss; the pin handle part of the ball pin is fixedly connected to the gear-jumping gasket; the spherical head part of the ball pin can bear on the upper end of the inner gear ring; the spherical head part of the ball pin can contact the first boss; a plurality of ball pins are provided; and the impact assembly is mounted on the upper end of the front shell and is located on the inner side of the torque adjustment assembly.

[0007] Preferably, the impact assembly comprises an upper impact tooth, a lower impact tooth, an impact conversion disk, an impact conversion gasket and a reset elastic member, the upper impact tooth is fixedly mounted on the upper end of the output assembly, the impact conversion gasket is sleeved on the upper impact tooth and slidably fitted on the inner wall of the front shell, a lug is fixedly provided on the impact conversion gasket, the upper surface of the impact conversion gasket contacts the output assembly, the lower impact tooth is fixedly mounted in the front shell, the impact conversion disk is rotatably sleeved on the lower impact tooth, the lower end of the impact conversion disk bears against the lower end of the lower impact tooth, the impact conversion disk is fixedly connected to the adjustment gasket, a second notch is provided on the impact conversion disk, the second notch can be moved to below the lug, and the reset elastic member is slidably sleeved on the upper impact tooth and the lower impact tooth and is located between the impact conversion disk and the impact conversion gasket.

[0008] Preferably, a conversion pin is fixedly provided on the side wall of the impact conversion disk, the conversion pin is fixedly connected to the adjustment gasket, and one end of the conversion pin is fixedly connected to the functional cup.

[0009] Preferably, the output assembly includes an output shaft, an upper cover plate and a bearing, the output shaft is passed through the front shell, the lower end of the output shaft is fixedly connected to the planetary gear set, the upper cover plate is fixedly installed at the uppermost end of the front shell, and the bearing is fixedly installed at the upper and lower ends of the output shaft.

[0010] Preferably, a third boss is fixedly provided on the gear jump gasket, and the torque adjustment assembly includes a torque cup, an adjustment screw and a torsion elastic member, the adjustment screw is slidably fitted on the upper end of the front shell, the torque cup is threadedly connected to the adjustment screw, the upper end of the torque cup rests on the upper cover plate, the lower end of the torque cup rests on the functional cup, the upper end of the torsion elastic member is sleeved on the adjustment screw, and the lower end of the torsion elastic member is sleeved on the third boss.

[0011] Preferably, it further comprises a rubber ring, which is fixedly installed in the lower impact tooth and can contact the output shaft.

[0012] The beneficial effects of the utility model are:

[0013] When the screw locking function is used: the function cup turns to the screw position, the function cup drives the adjustment gasket to rotate, the second boss of the adjustment gasket is aligned with the first notch of the jump gear gasket, when the output torque is greater than the axial pressure of the torsion spring, the inner gear ring can rotate in the opposite direction, the first boss will push the ball pin upwards, so that the jump gear gasket moves axially, and the inner gear ring and the ball pin will have a clutch jump gear, thereby realizing the screw function;

[0014] When using the electric drill function: the function cup turns to the electric drill gear, the function cup drives the adjustment gasket to rotate, the second boss of the adjustment gasket is staggered with the first notch of the jump gear gasket, and turns to the top of the plane of the jump gear gasket, resulting in insufficient rising space for the jump gear gasket. Therefore, the jump gear gasket locks the axial movement space of the ball pin and the inner gear ring, preventing the clutch from jumping gears, thereby achieving the maximum torque output of the electric drill function.

[0015] When using the impact function: the function cup turns to the impact gear, the function cup drives the adjustment gasket to rotate, the second boss of the adjustment gasket is staggered with the first notch of the jump gear gasket, and turns to the top of the plane of the jump gear gasket, resulting in insufficient rising space for the jump gear gasket, so the jump gear gasket locks the axial movement space of the ball pin and the inner gear ring, preventing the clutch from jumping gears, and realizing the maximum torque output; the impact assembly will drive the output assembly to complete the impact action.

[0016] In this way, the traditional electric drill gearbox structure on the market is optimized, the spring support gasket is removed, the error caused by the accumulation of internal parts is reduced, and the fluctuation of the axial clearance of the gear ring is reduced, so that the electric drill can provide greater torque. In addition, the more streamlined structure also effectively extends the service life of the electric drill gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] Figure 1 It is a cross-sectional view of the gear shifting device of the high-torque electric drill gearbox of the utility model;

[0019] Figure 2 The schematic diagram (1) is a structural diagram of the gear shifting device of the high-torque electric drill gearbox of the utility model;

[0020] Figure 3 This is a structural schematic diagram of the gear shifting device of the high-torque electric drill gearbox of the utility model (2);

[0021] Figure 4 It is a structural schematic diagram of the front shell in the gear switching device of the high-torque electric drill gear box of the utility model;

[0022] Figure 5 It is a structural schematic diagram of an impact conversion gasket in the gear switching device of the high-torque electric drill gear box of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the impact conversion disk in the gear switching device of the high-torque electric drill gear box of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the inner gear ring in the gear position switching device of the high-torque electric drill gear box of the utility model;

[0025] Figure 8 It is a structural schematic diagram of an adjusting gasket in the gear switching device of the high-torque electric drill gearbox of the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the gear-jumping gasket in the gear-position switching device of the high-torque electric drill gearbox of the utility model.

[0027] in:

[0028] 1-front shell; 11-groove;

[0029] 2-power source assembly; 21-planetary gear set; 22-inner ring gear; 221-first boss;

[0030] 3-function switching assembly; 31-function cup; 32-adjusting gasket; 321-second boss; 33-shifting gasket; 331-first notch; 332-third boss; 34-ball pin; 35-impact assembly; 351-upper impact tooth; 352-lower impact tooth; 353-impact conversion plate; 3531-conversion pin; 3532-second notch; 354-impact conversion gasket; 3541-lug; 355-reset elastic member;

[0031] 4-torque adjustment assembly; 41-torque cup; 42-adjusting screw; 43-torque elastic member;

[0032] 5-output assembly; 51-output shaft; 52-upper cover plate; 53-bearing;

[0033] 6- Rubber ring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] In the description of the present invention, it is necessary to understand that the directions and positional relationships indicated by “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] like Figures 1 to 9 As shown,

[0037] A gear switching device for a high-torque electric drill gearbox, comprising a front shell 1, a power source component 2 arranged at the bottom of the front shell 1, a function switching component 3 rotatably sleeved in the middle of the front shell 1, a torque adjustment component 4 rotatably sleeved on the upper end of the front shell 1 and an output component 5 rotatably connected to the front shell 1, the lower end of the output component 5 is mounted on the power source component 2, the power source component 2 comprises a planetary gear set 21 and an inner gear ring 22, the planetary gear set 21 is fixedly connected to the lower end of the output component 5, the inner gear ring 22 is meshed with the planetary gear set 21, the inner gear ring 22 is mounted in the front shell 1, a first boss 221 is fixedly arranged on the inner gear ring 22, a groove 11 is arranged on the front shell 1, the function switching component 3 comprises a function cup 31, an adjustment gasket 32, a gear jump gasket 33, a ball pin 34 and a punch The impact assembly 35, the adjusting gasket 32 ​​is rotatably set in the groove 11 and cannot move along the axial direction of the front shell 1, the lower end of the adjusting gasket 32 ​​is fixedly set with a second boss 321, the functional cup 31 is fixedly sleeved on the adjusting gasket 32, the jump gear gasket 33 is slidably set on the front shell 1 and is located below the adjusting gasket 32, and the jump gear gasket 33 is fixedly set with a first notch 331, the first notch 331 can correspond to the second boss 321, the pin handle part of the ball pin 34 is fixedly connected to the jump gear gasket 33, the spherical head part of the ball pin 34 can be supported on the upper end of the inner gear ring 22, and the spherical head part of the ball pin 34 can contact the first boss 221, and a plurality of ball pins 34 are provided. The impact assembly 35 is installed at the upper end of the front shell 1 and is located on the inner side of the torque adjustment assembly 4.

[0038] In this way, when the screw locking function is used: the function cup 31 turns to the screw gear, the function cup 31 drives the adjusting gasket 32 ​​to rotate, and the second boss 321 of the adjusting gasket 32 ​​is aligned with the first notch 331 of the gear-jumping gasket 33. When the output torque is greater than the axial pressure of the torsion spring, the inner gear ring 22 can rotate in the opposite direction, and the first boss 221 will push the ball pin 34 upwards, so that the gear-jumping gasket 33 moves axially, and the inner gear ring 22 and the ball pin 34 have a clutch gear jump, thereby realizing the screw function; when the electric drill function is used: the function cup 31 turns to the electric drill gear, the function cup 31 drives the adjusting gasket 32 ​​to rotate, and the second boss 321 of the adjusting gasket 32 ​​is staggered with the first notch 331 of the gear-jumping gasket 33, and turns to the top of the plane of the gear-jumping gasket 33, resulting in insufficient rising space for the gear-jumping gasket 33. Therefore, the gear-jumping gasket 33 locks the axial movement space of the ball pin 34 and the inner gear ring 22, and prevents it from having a clutch gear jump, thereby realizing the maximum torque output of the electric drill function. When the impact function is used: the function cup 31 is turned to the impact gear, the function cup 31 drives the adjustment gasket 32 ​​to rotate, the second boss 321 of the adjustment gasket 32 ​​is staggered with the first notch 331 of the jump gear gasket 33, and turns to the top of the plane of the jump gear gasket 33, resulting in insufficient rising space for the jump gear gasket 33, so the jump gear gasket 33 locks the axial movement space of the ball pin 34 and the inner gear ring 22, preventing it from having a clutch jump gear, and achieving maximum torque output; the impact component 35 will drive the output component 5 to complete the impact action. In this way, the traditional electric drill gearbox structure on the market is optimized, the spring support gasket is removed, the error caused by the accumulation of internal parts is reduced, and the fluctuation of the axial clearance of the gear ring is reduced, so that the electric drill can provide greater torque. In addition, the more streamlined structure also effectively extends the service life of the electric drill gearbox.

[0039] In addition, the impact assembly 35 includes an upper impact tooth 351, a lower impact tooth 352, an impact conversion disk 353, an impact conversion gasket 354 and a reset elastic member 355. The upper impact tooth 351 is fixedly mounted on the upper end of the output assembly 5. The impact conversion gasket 354 is sleeved on the upper impact tooth 351 and slidably fits on the inner wall of the front shell 1. The impact conversion gasket 354 is fixedly provided with a lug 3541. The upper surface of the impact conversion gasket 354 contacts the output assembly 5. The lower impact tooth 352 is fixedly mounted on In the front housing 1, the impact conversion disc 353 is rotatably sleeved on the lower impact tooth 352, the lower end of the impact conversion disc 353 bears against the lower end of the lower impact tooth 352, the impact conversion disc 353 is fixedly connected to the adjustment gasket 32, the impact conversion disc 353 is provided with a second notch 3532, the second notch 3532 can be moved below the lug 3541, and the reset elastic member 355 is slidably sleeved on the upper impact tooth 351 and the lower impact tooth 352 and is located between the impact conversion disc 353 and the impact conversion gasket 354. Specifically, the upper impact tooth 351 and the output shaft 51 are interference fit, so that the two can move together, and the lower impact tooth 352 is fixed in position, so that the impact between the upper impact tooth 351 and the lower impact tooth 352 can be achieved.

[0040] In this way, when the functional cup 31 is transferred to the impact gear, the functional cup 31 drives the adjusting gasket 32 ​​to rotate, and the second boss 321 of the adjusting gasket 32 ​​is offset from the first notch 331 of the gear-jumping gasket 33, and is transferred to the upper plane of the gear-jumping gasket 33, resulting in insufficient rising space for the gear-jumping gasket 33. Therefore, the gear-jumping gasket 33 locks the axial movement space of the ball pin 34 and the inner gear ring 22, preventing the clutch from jumping gears, thereby achieving maximum torque output. When the function cup 31 drives the adjustment gasket 32 ​​to rotate, the adjustment gasket 32 ​​also drives the conversion pin 3531 to rotate, and the conversion pin 3531 drives the impact conversion disk 353 to rotate. During the rotation of the impact conversion disk 353, the impact conversion disk 353 switches from the electric drill gear state (the plane of the impact conversion disk 353 is below the lug 3541 of the impact conversion gasket 354) to the impact gear state (the second notch 3532 of the impact conversion disk 353 is below the lug 3541 of the impact conversion gasket 354), and when the output shaft 51 connecting component is working, it is pressed downward, and the upper impact tooth 351 moves downward together with the output shaft 51, and engages with the lower impact tooth 352 to realize the impact function.

[0041] In addition, a conversion pin 3531 is fixedly provided on the side wall of the impact conversion disk 353 . The conversion pin 3531 is fixedly connected to the adjustment gasket 32 ​​, and one end of the conversion pin 3531 is fixedly connected to the function cup 31 .

[0042] In this way, the impact conversion disk 353 can move together with the function cup 31, ensuring the accuracy of the gear switching.

[0043] In addition, the output assembly 5 includes an output shaft 51, an upper cover plate 52 and a bearing 53. The output shaft 51 is passed through the front shell 1, the lower end of the output shaft 51 is fixedly connected to the planetary gear set 21, the upper cover plate 52 is fixedly installed at the uppermost end of the front shell 1, and the bearing 53 is fixedly installed at the upper and lower ends of the output shaft 51.

[0044] In this way, the stability of the output shaft 51 is effectively ensured, and the fixation of various parts inside the gear switching device is also achieved.

[0045] In addition, a third boss 332 is fixedly provided on the shift-jump gasket 33, and the torque adjustment assembly 4 includes a torque cup 41, an adjusting screw 42 and a torque elastic member 43. The adjusting screw 42 is slidably fitted on the upper end of the front shell 1, and the torque cup 41 is threadedly connected to the adjusting screw 42. The upper end of the torque cup 41 rests on the upper cover plate 52, and the lower end of the torque cup 41 rests on the functional cup 31. The upper end of the torque elastic member 43 is sleeved on the adjusting screw 42, and the lower end of the torque elastic member 43 is sleeved on the third boss 332.

[0046] In this way, the torsion elastic member 43 directly acts on the shift-jumping gasket 33 . In the case of not installing a spring support gasket, the compression amount of the torsion elastic member 43 can be adjusted by rotating the torsion cup 41 to complete the adjustment of the torque.

[0047] In addition, a rubber ring 6 is also included. The rubber ring 6 is fixedly installed in the lower impact tooth 352 , and the rubber ring 6 can contact the output shaft 51 .

[0048] In this way, the shaking of the output shaft 51 during the impact process can be effectively reduced, and the stability of the output shaft 51 during the impact process can be improved.

[0049] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gear shift device for a high-torque electric drill gearbox, comprising a front shell (1), a power source assembly (2) arranged at the bottom of the front shell (1), a function switching assembly (3) rotatably sleeved on the middle of the front shell (1), a torque adjustment assembly (4) rotatably sleeved on the upper end of the front shell (1), and an output assembly (5) rotatably connected to the front shell (1), wherein the lower end of the output assembly (5) is mounted on the power source assembly (2), It is characterized in that The power source assembly (2) comprises a planetary gear set (21) and an inner gear ring (22), wherein the planetary gear set (21) is fixedly connected to the lower end of the output assembly (5), and the inner gear ring (22) is meshedly connected to the planetary gear set (21), and the inner gear ring (22) is installed in the front shell (1), and a first boss (221) is fixedly provided on the inner gear ring (22), and a groove (11) is provided on the front shell (1), and the function switching assembly (3) comprises a function cup (31), an adjustment gasket (32), a shift-jumping gasket (33), a ball stud (34) and an impact assembly (35), wherein the adjustment gasket (32) is rotatably provided in the groove (11) and cannot move along the axial direction of the front shell (1), and a second boss (321) is fixedly provided on the lower end of the adjustment gasket (32). 1), the functional cup (31) is fixedly sleeved on the adjusting gasket (32), the shift jump gasket (33) is slidably arranged on the front shell (1) and is located below the adjusting gasket (32), a first notch (331) is fixedly arranged on the shift jump gasket (33), the first notch (331) can correspond to the second boss (321), the pin handle part of the ball stud (34) is fixedly connected to the shift jump gasket (33), the spherical head part of the ball stud (34) can be supported on the upper end of the inner gear ring (22), the spherical head part of the ball stud (34) can contact the first boss (221), a plurality of ball studs (34) are provided, and the impact assembly (35) is installed on the upper end of the front shell (1) and is located on the inner side of the torque adjustment assembly (4).

2. The gear switching device of the high torque electric drill gearbox according to claim 1, It is characterized in that The impact assembly (35) comprises an upper impact tooth (351), a lower impact tooth (352), an impact conversion disk (353), an impact conversion gasket (354) and a reset elastic member (355); the upper impact tooth (351) is fixedly mounted on the upper end of the output assembly (5); the impact conversion gasket (354) is sleeved on the upper impact tooth (351) and slidably fitted on the inner wall of the front shell (1); a lug (3541) is fixedly arranged on the impact conversion gasket (354); the upper surface of the impact conversion gasket (354) contacts the output assembly (5); the lower impact tooth (352) is fixedly mounted on the front shell (1) ), the impact conversion disk (353) is rotatably sleeved on the lower impact tooth (352), the lower end of the impact conversion disk (353) is supported on the lower end of the lower impact tooth (352), the impact conversion disk (353) is fixedly connected to the adjustment gasket (32), the impact conversion disk (353) is provided with a second notch (3532), the second notch (3532) can be moved below the lug (3541), the reset elastic member (355) is slidably sleeved on the upper impact tooth (351) and the lower impact tooth (352) and is located between the impact conversion disk (353) and the impact conversion gasket (354).

3. The gear switching device of the high torque electric drill gearbox according to claim 2, It is characterized in that A conversion pin (3531) is fixedly arranged on the side wall of the impact conversion disk (353), the conversion pin (3531) is fixedly connected to the adjustment gasket (32), and one end of the conversion pin (3531) is fixedly connected to the functional cup (31).

4. The gear shifting device of the high torque electric drill gearbox according to claim 3, It is characterized in that The output assembly (5) comprises an output shaft (51), an upper cover plate (52) and a bearing (53); the output shaft (51) is inserted into the front housing (1); the lower end of the output shaft (51) is fixedly connected to the planetary gear set (21); the upper cover plate (52) is fixedly mounted on the uppermost end of the front housing (1); and the bearing (53) is fixedly mounted on the upper and lower ends of the output shaft (51).

5. The gear shifting device of the high torque electric drill gearbox according to claim 4, It is characterized in that A third boss (332) is fixedly arranged on the shift-jump gasket (33); the torque adjustment assembly (4) comprises a torque cup (41), an adjustment screw (42) and a torque elastic member (43); the adjustment screw (42) is slidably fitted on the upper end of the front shell (1); the torque cup (41) is threadedly connected to the adjustment screw (42); the upper end of the torque cup (41) rests on the upper cover plate (52); the lower end of the torque cup (41) rests on the functional cup (31); the upper end of the torque elastic member (43) is sleeved on the adjustment screw (42); and the lower end of the torque elastic member (43) is sleeved on the third boss (332).

6. The gear shifting device of the high torque electric drill gearbox according to claim 4, It is characterized in that It also includes a rubber ring (6), which is fixedly installed in the lower impact tooth (352), and the rubber ring (6) can contact the output shaft (51).

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