CN214425025U - Gear box of screwdriver - Google Patents
Gear box of screwdriver Download PDFInfo
- Publication number
- CN214425025U CN214425025U CN202120203226.7U CN202120203226U CN214425025U CN 214425025 U CN214425025 U CN 214425025U CN 202120203226 U CN202120203226 U CN 202120203226U CN 214425025 U CN214425025 U CN 214425025U
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- output shaft
- sleeve
- screwdriver
- planetary gear
- axle sleeve
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Abstract
The utility model discloses a gear box of screwdriver, including the axle sleeve, be equipped with the ring gear on the axle sleeve, be equipped with planetary gear set in the ring gear, planetary gear set is last to be equipped with and to be connected motor tooth with motor drive, be equipped with the auto-lock planet carrier of being connected with planetary gear set transmission between planetary gear set and the axle sleeve, rotate on the axle sleeve and be connected with the output shaft, one end of output shaft passes the axle sleeve and is connected with auto-lock planet carrier transmission through the lock frame, the other end of output shaft is equipped with the mounting hole that is used for installing the screwdriver head, the mounting hole extends to in the axle sleeve; the shaft sleeve is internally provided with a first step, the output shaft is provided with a second step and a third step, the second step is arranged corresponding to the first step, the lock frame is fixed on the second step, the lock frame is matched with the backstop of the first step, the third step is matched with the backstop of the end face of the shaft sleeve, and a gasket is arranged between the third step and the shaft sleeve in a pressing mode. The utility model discloses possess simple structure compactness, accommodation wide and connect firm advantage.
Description
Technical Field
The utility model belongs to the technical field of electric tool, in particular to gear box of screwdriver.
Background
A screwdriver is a common tool used to turn a screw to force it into place, also known as a screwdriver. The common electric screwdriver mainly comprises a storage battery, a motor, a gear box and a quick-assembly chuck, the storage battery supplies power to the motor, the motor drives the quick-assembly chuck through a planetary gear in the gear box so as to enable the quick-assembly chuck to rotate to twist a screw, and a 'one' word screwdriver head or a 'cross' screwdriver head or a screwdriver head with other shapes can be quickly arranged on the quick-assembly chuck. At present, in order to adapt to work in a narrow space and be convenient to carry, an ultra-short screwdriver is developed, but in the practical application process, the matching lengths of the fast-assembling chuck and the screwdriver head are different, particularly the matching length of the double-head screwdriver head is longer, so that the double-head screwdriver head is not firm in connection and is unstable in stress; and because the screwdriver is an ultra-short screwdriver, the mounting hole in the quick-mounting chuck is difficult to be manufactured too long on the premise of ensuring that the length of the screwdriver is ultra-short. Therefore, there is a need to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a gear box of screwdriver, possess simple structure compactness, accommodation wide and connect firm advantage.
The utility model provides a technical scheme that its technical problem adopted is: a gear box of a screwdriver comprises a shaft sleeve, wherein an inner gear ring is arranged on the shaft sleeve, a planetary gear set is arranged in the inner gear ring, motor teeth in transmission connection with a motor are arranged on the planetary gear set, a self-locking planet carrier in transmission connection with the planetary gear set is arranged between the planetary gear set and the shaft sleeve, an output shaft is connected to the shaft sleeve in a rotating mode, one end of the output shaft penetrates through the shaft sleeve and is in transmission connection with the self-locking planet carrier through a lock frame, a mounting hole for mounting a screwdriver bit is formed in the other end of the output shaft, and the mounting hole extends into the shaft sleeve; the shaft sleeve is internally provided with a first step, the output shaft is provided with a second step and a third step, the second step is arranged corresponding to the first step, the lock frame is fixed on the second step, the lock frame is matched with the backstop of the first step, the third step is matched with the backstop of the end face of the shaft sleeve, and a gasket is arranged between the third step and the shaft sleeve in a pressing mode.
Further, the planetary gear set is a three-stage planetary gear.
Furthermore, a positioning sleeve is arranged on the inner gear ring, and a through hole corresponding to the motor tooth penetrates through the positioning sleeve; the motor is convenient to connect, so that the connection is firm.
Furthermore, a fast chuck component corresponding to the mounting hole is arranged at the end part of the output shaft, the fast chuck component comprises an outer sleeve and a spring, the outer sleeve is sleeved on the output shaft, and the spring is sleeved between the outer sleeve and the output shaft; a limiting hole communicated with the mounting hole is formed in the side wall of the output shaft, a positioning steel ball is arranged in the limiting hole, and a ball withdrawing groove corresponding to the positioning steel ball is formed in the inner side wall of the outer sleeve; the output shaft is also provided with a fourth step, the output shaft is provided with an annular groove for installing a limiting ring, one end of the spring is abutted against the limiting ring, the other end of the spring is abutted against the outer sleeve, and the spring always tends to enable the outer sleeve to abut against the fourth step; the installation and the dismantlement of batch head are convenient for.
Furthermore, the cross section of the mounting hole is hexagonal, and the limiting hole is correspondingly formed in the side face of the mounting hole; the connection of the batch head is firm, and the problem that the batch head is blocked due to the stress deformation of the batch head is solved.
The utility model has the advantages that: the shaft sleeve is firmly connected with the output shaft by arranging the first step in the shaft sleeve, arranging the second step and the third step on the output shaft, arranging the second step corresponding to the first step, fixing the lock frame on the second step, matching the lock frame with the stop of the first step, matching the third step with the stop of the end surface of the shaft sleeve, and arranging the gasket between the third step and the shaft sleeve in a pressing way, the transmission output shaft of the planetary gear set is not influenced, the shaft sleeve is convenient to be arranged in a cylindrical shape, so that the mounting hole can extend inwards the shaft sleeve, under the condition of not increasing the length of the output shaft, the installation hole can be made longer to adapt to a double-head type screwdriver head with longer length, the corresponding screwdriver still keeps an ultra-short type, and solved the problem among the prior art, enlarged application scope, generally speaking, the utility model discloses simple structure compactness, accommodation are wider and connect firm advantage have been possessed.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
Shown in the figure: 1-shaft sleeve; 11-a first step; 2-inner gear ring; 3-a planetary gear set; 4-motor teeth; 5-self-locking planet carrier; 6-an output shaft; 61-mounting holes; 62-a second step; 63-a third step; 64-limiting holes; 65-a fourth step; 66-an annular groove; 7-locking the frame; 8-a gasket; 9-positioning sleeve; 91-a through hole; 10-a fast chuck assembly; 101-a jacket; 1011-bead removal groove; 102-a spring; 103-positioning steel balls; 104-a stop collar.
Detailed Description
For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:
as shown in fig. 1 and 2, a gear box of a screwdriver comprises a shaft sleeve 1, wherein an inner gear ring 2 is arranged on the shaft sleeve 1, a planetary gear set 3 is arranged in the inner gear ring 2, a motor tooth 4 in transmission connection with a motor is arranged on the planetary gear set 3, a self-locking planet carrier 5 in transmission connection with the planetary gear set 3 is arranged between the planetary gear set 3 and the shaft sleeve 1, an output shaft 6 is rotatably connected to the shaft sleeve 1, one end of the output shaft 6 penetrates through the shaft sleeve 1 and is in transmission connection with the self-locking planet carrier 5 through a lock frame 7, a mounting hole 61 for mounting a screwdriver bit is arranged at the other end of the output shaft 6, and the mounting hole 61 extends into the shaft sleeve 1; be equipped with first step 11 in the axle sleeve 1, be equipped with second step 62 and third step 63 on the output shaft 6, second step 62 corresponds the setting with first step 11, and lock frame 7 is fixed in on second step 62, and lock frame 7 and first step 11 backstop cooperation, third step 63 and the terminal surface backstop cooperation of axle sleeve 1, the pressure is equipped with packing ring 8 between third step 63 and the axle sleeve 1.
Preferably, the planetary gear set 3 is a three-stage planetary gear; the inner gear ring 2 is provided with a positioning sleeve 9, a through hole 91 corresponding to the motor tooth 4 penetrates through the positioning sleeve 9, and the motor tooth 4 is fixedly connected with the output of the motor; it should be noted that, the structure and the working principle of the self-locking planet carrier 5 according to the present invention can refer to the "rechargeable electric drill and gearbox of screwdriver" disclosed in CN200820084557.8, which is not repeated here.
The end part of the output shaft 6 is provided with a fast chuck component 10 corresponding to the mounting hole 61, the fast chuck component 10 comprises a jacket 101 and a spring 102, the jacket 101 is sleeved on the output shaft 6, and the spring 102 is sleeved between the jacket 101 and the output shaft 6; a limiting hole 64 communicated with the mounting hole 61 is formed in the side wall of the output shaft 6, a positioning steel ball 103 is arranged in the limiting hole 64, and a ball withdrawing groove 1011 corresponding to the positioning steel ball 103 is formed in the inner side wall of the outer sleeve 101; the output shaft 6 is also provided with a fourth step 65, the output shaft 6 is provided with an annular groove 66 for installing a limiting ring 104, one end of a spring 102 is abutted against the limiting ring 104, the other end of the spring 102 is abutted against the outer sleeve 101, and the spring 102 always tends to enable the outer sleeve 101 to be abutted against the fourth step 65; the cross section of the mounting hole 61 is hexagonal, and the limiting hole 64 is correspondingly arranged on the side surface of the mounting hole 61.
Specifically, in the use, criticize the head and can receive great radial revolving force, because spacing hole 64 corresponds and sets up on the side of mounting hole 61 for can not damage the positioning action of location steel ball 103 promptly, also can not damage the fit clearance between spacing hole 64 and the location steel ball 103, thereby can guarantee to criticize the head and can not block in the mounting hole 61 of output shaft 6.
When the screwdriver bit is used, the screwdriver bit can be inserted into the mounting hole 61, and the positioning steel ball 103 locks the screwdriver bit under the action of the spring 102; when the bit needs to be replaced or detached, the outer sleeve 101 is pushed by hand to overcome the elastic force of the spring 102, the positioning steel ball 103 just corresponds to the ball withdrawing groove 1011, and the bit can be detached after the bit is pulled out; specifically, the quick chuck assembly 10 can refer to the working principle of the quick joint on the market, and the detailed description thereof is omitted here.
The utility model discloses a concrete theory of operation is unanimous basically with the theory of operation of the screwdriver on the market, and here is no longer repeated one by one.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (5)
1. The utility model provides a gear box of screwdriver, includes axle sleeve (1), be equipped with ring gear (2) on axle sleeve (1), be equipped with planetary gear set (3) in ring gear (2), be equipped with on planetary gear set (3) and be connected motor tooth (4) with motor drive, planetary gear set (3) with be equipped with between axle sleeve (1) with auto-lock planet carrier (5) that planetary gear set (3) transmission is connected, its characterized in that:
an output shaft (6) is rotatably connected to the shaft sleeve (1), one end of the output shaft (6) penetrates through the shaft sleeve (1) and is in transmission connection with the self-locking planet carrier (5) through a lock frame (7), a mounting hole (61) for mounting a screwdriver bit is formed in the other end of the output shaft (6), and the mounting hole (61) extends into the shaft sleeve (1);
be equipped with first step (11) in axle sleeve (1), be equipped with second step (62) and third step (63) on output shaft (6), second step (62) with first step (11) correspond the setting, lock frame (7) are fixed in on second step (62), lock frame (7) with first step (11) backstop cooperation, third step (63) with the terminal surface backstop cooperation of axle sleeve (1), third step (63) with pressure is equipped with packing ring (8) between axle sleeve (1).
2. A gearbox for a screwdriver as defined in claim 1, wherein: the planetary gear set (3) is a three-stage planetary gear.
3. A gearbox for a screwdriver as defined in claim 1, wherein: and a positioning sleeve (9) is arranged on the inner gear ring (2), and a through hole (91) corresponding to the motor tooth (4) penetrates through the positioning sleeve (9).
4. A gearbox for a screwdriver as defined in claim 1, wherein: a quick chuck component (10) corresponding to the mounting hole (61) is arranged at the end part of the output shaft (6), the quick chuck component (10) comprises an outer sleeve (101) and a spring (102), the outer sleeve (101) is sleeved on the output shaft (6), and the spring (102) is sleeved between the outer sleeve (101) and the output shaft (6);
a limiting hole (64) communicated with the mounting hole (61) is formed in the side wall of the output shaft (6), a positioning steel ball (103) is arranged in the limiting hole (64), and a ball withdrawing groove (1011) corresponding to the positioning steel ball (103) is formed in the inner side wall of the outer sleeve (101);
the output shaft (6) is further provided with a fourth step (65), an annular groove (66) used for installing a limiting ring (104) is formed in the output shaft (6), one end of the spring (102) abuts against the limiting ring (104), the other end of the spring (102) abuts against the outer sleeve (101), and the spring (102) always tends to enable the outer sleeve (101) to abut against the fourth step (65).
5. A gearbox for a screwdriver as defined in claim 4, wherein: the cross section of the mounting hole (61) is hexagonal, and the limiting hole (64) is correspondingly formed in the side face of the mounting hole (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120203226.7U CN214425025U (en) | 2021-01-26 | 2021-01-26 | Gear box of screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120203226.7U CN214425025U (en) | 2021-01-26 | 2021-01-26 | Gear box of screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214425025U true CN214425025U (en) | 2021-10-19 |
Family
ID=78057145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120203226.7U Active CN214425025U (en) | 2021-01-26 | 2021-01-26 | Gear box of screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214425025U (en) |
-
2021
- 2021-01-26 CN CN202120203226.7U patent/CN214425025U/en active Active
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