CN211288618U - Speed reducer of handheld electric drill - Google Patents
Speed reducer of handheld electric drill Download PDFInfo
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- CN211288618U CN211288618U CN201922153114.0U CN201922153114U CN211288618U CN 211288618 U CN211288618 U CN 211288618U CN 201922153114 U CN201922153114 U CN 201922153114U CN 211288618 U CN211288618 U CN 211288618U
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- 239000003638 chemical reducing agent Substances 0.000 title abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a hand-held electric drill speed reducer, which comprises an outer shell, a main shaft, a planetary gear speed reducing mechanism, an output shaft and a telescopic sleeve are arranged in the outer shell, the planetary gear speed reducing mechanism comprises a central gear shaft, a plurality of duplex planetary gears, an inner gear and a second planetary plate, the main shaft is fixedly connected with the central gear shaft, the main shaft, the central gear shaft and the outer shell are coaxial, the plurality of duplex planetary gears are circumferentially and uniformly distributed by taking the central gear shaft as a central shaft, a first gear and a second gear which are coaxial are arranged on the duplex planetary gears, the diameter of the first gear is smaller than that of the second gear, the first gear is meshed with the gear on the central gear shaft, the inner gear is fixedly connected with the inner wall of the outer shell, the second gear is meshed with the inner gear, one end of the shaft of the duplex planetary gears is fixedly connected with the second planetary plate, the second planetary, the outer wall of the telescopic sleeve is contacted with the inner wall of the front sleeve. The utility model discloses handheld electric drill reduction gear transmission is stable.
Description
Technical Field
The utility model relates to an electric drill technical field especially relates to a handheld electric drill reduction gear.
Background
The handheld electric drill is a common mechanical device, and in order to ensure the safety of users in different working environments and the stability of the working of the handheld electric drill, the rotating speed of the handheld electric drill needs to be properly reduced in some working environments so as to increase the torque of a drill bit. Therefore, it is particularly necessary to design a speed reducer suitable for a hand-held electric drill with a suitable transmission ratio.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a handheld electric drill reduction gear to solve the problem that above-mentioned prior art exists, under the prerequisite that does not change the rotational speed of current handheld electric drill's motor, reduce handheld electric drill's output rotational speed, adopt special planetary reducer overall arrangement to realize the special requirement of drive ratio between 2 ~ 3.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a hand-held electric drill speed reducer, which comprises an outer shell, wherein the outer shell comprises a front sleeve and a tail sleeve which are connected by screw threads, a main shaft, a planetary gear speed reducing mechanism, an output shaft and a telescopic sleeve are sequentially arranged in the outer shell from the tail sleeve to the front sleeve, the planetary gear speed reducing mechanism comprises a central gear shaft, a plurality of duplex planetary gears, an internal gear and a second planetary disk, the main shaft is fixedly connected with the central gear shaft, the main shaft, the central gear shaft and the outer shell are coaxial, the plurality of duplex planetary gears are circumferentially and uniformly distributed by taking the central gear shaft as a central shaft, the duplex planetary gears are provided with a first gear and a second gear which are coaxial, the diameter of the first gear is smaller than the second gear, the first gear is meshed with a gear on the central gear shaft, the internal gear is fixedly connected with the inner wall of the outer shell, the second gear is meshed with the inner gear, one end of a shaft of the duplex planetary gear is fixedly connected with the second planetary disk, the second planetary disk is fixedly connected with one end of the output shaft, the telescopic sleeve is fixedly connected with the other end of the output shaft, and the outer wall of the telescopic sleeve is contacted with the inner wall of the front sleeve.
Preferably, said double planetary gear is coaxial with said sun gear shaft, and the tooth grooves of said first gear and said second gear in the same double planetary gear are aligned.
Preferably, the planetary gear reduction mechanism further comprises a first planetary disk, the other end of the shaft of the duplex planetary gear is fixedly connected with a second planetary disk, the first planetary disk is further fixedly connected with the second planetary disk through a plurality of planetary disk fixing pins, and the first planetary disk and the second planetary disk both correspond to the planetary disk fixing pins and are provided with holes and are in interference fit with the planetary disk fixing pins.
Preferably, the drill bit further comprises an orifice snap spring positioned between the tail sleeve and the front sleeve, one side of the orifice snap spring is attached to the surface of the front sleeve and the inner gear, the other side of the orifice snap spring is attached to the tail sleeve, one end, far away from the orifice snap spring, of the inner gear is attached to a circular step in the front sleeve, and one end, close to the orifice snap spring, of the inner gear is provided with a lug inserted into a groove of the orifice snap spring.
Preferably, the cover is equipped with first bearing and second bearing on the output shaft, the outer lane of first bearing with the outer lane of second bearing with the inner wall fixed connection of front cover, first bearing with be provided with bearing washer and skeleton oil blanket between the second bearing, sun gear axle one end through the third bearing with second planetary disk normal running fit, the other end through the fourth bearing with tail cover normal running fit, the surface of the outer lane of fourth bearing passes through the drill way jump ring with the laminating of the interior step of tail cover.
Preferably, a spring retainer ring is sleeved on the output shaft, a spring is arranged between the telescopic sleeve and the spring retainer ring, three steel balls circumferentially distributed along the circumferential surface of the output shaft are arranged between the output shaft and the inner wall of the telescopic sleeve, and a placing hole is formed in the outer wall of the output shaft and corresponds to each steel ball.
Preferably, a clearance groove is formed between the front sleeve and the tail sleeve, and an indication ring is arranged on the clearance groove.
Preferably, the gear on the sun gear shaft has the same module as the internal gear.
The utility model discloses handheld electric drill reduction gear has gained following technological effect for prior art:
the utility model discloses handheld electric drill reduction gear can reduce the output rotational speed of handheld electric drill, increase the moment of torsion under the prerequisite that does not change the rotational speed of the motor of current handheld electric drill. The handheld electric drill speed reducer of the utility model is provided with the duplex planetary gear in the planetary gear speed reducing mechanism, compared with the single-gear planetary gear, the handheld electric drill speed reducer can reduce the contact frequency of the gear tooth surface of the planetary gear with the tooth surfaces of the internal gear and the central gear in one working cycle, thereby reducing the tooth surface abrasion and prolonging the service life of the gear; two planetary discs are adopted, so that the duplex planetary gear is balanced in load and stable in transmission; the transmission ratio below 1:3 which is difficult to realize by the traditional NGW type layout is realized by flexibly changing the number of the double-linked gears. The utility model discloses handheld electric drill reduction gear compact structure, small, the quality is little, the transmission is stable and bearing capacity is strong, has realized with compact structure that the drive ratio is not more than 3 special ability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of the speed reducer of the electric hand drill of the present invention;
fig. 2 is a second schematic structural view of the reducer of the electric hand drill of the present invention;
fig. 3 is an exploded view of the reducer of the electric hand drill of the present invention;
fig. 4 is a schematic structural view of a planetary gear speed reducing mechanism in the speed reducer of the electric hand drill of the utility model;
fig. 5 is an exploded view of the planetary gear reduction mechanism in the hand-held electric drill reducer of the present invention;
wherein: 1-telescopic sleeve, 2-front sleeve, 3-tail sleeve, 4-main shaft, 5-output shaft, 6-sealing ring, 7-marking ring, 8-bearing retainer ring, 9-first bearing, 10-bearing washer, 11-second bearing, 12-skeleton oil seal, 13-planetary gear speed reducing mechanism, 14-isolation ring, 15-orifice snap spring, 16-third bearing, 17-internal gear, 18-friction plate, 19-first planetary disk, 20-second planetary disk, 21-duplex planetary gear, 22-planetary disk fixing pin, 23-central gear shaft and 24-fourth bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model aims at providing a handheld electric drill reduction gear to solve the problem that above-mentioned prior art exists, under the prerequisite that does not change the rotational speed of current handheld electric drill's motor, reduce the output rotational speed of handheld electric drill.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 5: the handheld electric drill speed reducer of this embodiment includes the shell body, and the shell body includes 2 and the tail cover 3 through threaded connection, is formed with the relief groove between 2 and the tail cover 3 of front cover, is provided with on the relief groove and marks ring 7, is provided with sealing washer 6 between 2 and the mark ring 7 of front cover, and 2, mark ring 7 and the tail cover 3 of front cover constitute the shell body.
The main shaft 4, the planetary gear speed reducing mechanism 13, the output shaft 5 and the telescopic sleeve 1 are sequentially arranged in the outer shell from the tail sleeve 3 to the front sleeve 2. The planetary gear speed reducing mechanism 13 comprises a central gear shaft 23, 3 duplex planetary gears 21, an internal gear 17 and a second planetary disk 20, wherein the main shaft 4 is fixedly connected with the central gear shaft 23, the main shaft 4, the central gear shaft 23 and the outer shell are coaxial, the 3 duplex planetary gears 21 are circumferentially and uniformly distributed by taking the central gear shaft 23 as a central shaft, the duplex planetary gears 21 are coaxial with the central gear shaft 23, and tooth grooves of a first gear and a second gear in the same duplex planetary gear 21 are aligned. The duplex planetary gear 21 is provided with a first gear and a second gear which are coaxial, the diameter of the first gear is smaller than that of the second gear, the first gear is meshed with a gear on the central gear shaft 23, the gear on the central gear shaft 23 is the same as the modulus of the internal gear 17, the internal gear 17 is fixedly connected with the inner wall of the outer shell, the second gear is meshed with the internal gear 17, one end of a shaft of the duplex planetary gear 21 is fixedly connected with the second planetary plate 20, the second planetary plate 20 is fixedly connected with one end of the output shaft 5, the telescopic sleeve 1 is fixedly connected with the other end of the output shaft 5, the outer wall of the telescopic sleeve 1 is contacted with the inner wall of the front sleeve 2, the output shaft 5 is sleeved with a spring retainer ring, a spring is arranged between the telescopic sleeve 1 and the spring retainer ring, three steel balls which are circumferentially distributed along the circumferential surface of the output shaft 5 are arranged between the output shaft 5 and the.
The planetary gear reduction mechanism 13 further includes a first planetary disk 19, the other end of the shaft of the duplex planetary gear 21 is fixedly connected with a second planetary disk 20, the first planetary disk 19 is further fixedly connected with the second planetary disk 20 through a plurality of planetary disk fixing pins 22, and the first planetary disk 19 and the second planetary disk 20 are both provided with holes corresponding to the planetary disk fixing pins 22 and are both in interference fit with the planetary disk fixing pins 22.
The handheld electric drill speed reducer of this embodiment still includes the drill way jump ring 15 that is located between tail cover 3 and the front cover 2, and 15 one sides of drill way jump ring are laminated with the face of front cover 2 and internal gear 17, the opposite side is laminated with tail cover 3, and the one end that internal gear 17 kept away from drill way jump ring 15 is laminated with the circular step in the front cover 2, and the one end that internal gear 17 is close to drill way jump ring 15 is provided with the lug that inserts in the groove of drill way jump ring 15.
The output shaft 5 is sleeved with a first bearing 9 and a second bearing 11, the outer ring of the first bearing 9 and the outer ring of the second bearing 11 are fixedly connected with the inner wall of the front sleeve 2, a bearing washer 10 and a framework oil seal 12 are arranged between the first bearing 9 and the second bearing 11, a bearing retainer ring 8 is further arranged beside the first bearing 9, one end of the second bearing 11 is in contact with an isolation ring 14 through the end face of the outer ring, the other end face of the isolation ring 14 is attached to an internal gear 17, the other end of the internal gear 17 is attached to a friction plate 18, one end of a central gear shaft 23 is in running fit with a second planetary disk 20 through a third bearing 16, the other end of the central gear shaft is in running fit with a tail sleeve 3 through a fourth bearing 24, and the outer surface of the outer ring of the fourth bearing.
The working process of the handheld electric drill speed reducer of the embodiment is as follows: the power source inputs power to the main shaft 4, so that the main shaft 4 rotates at a certain rotating speed, the main shaft 4 drives the central gear shaft 23 to rotate in the same direction at the same rotating speed, and the central gear shaft 23 drives the three duplex planetary gears 21 to rotate around the central shaft of the central gear shaft; the second gear internal gear 17 on the duplex planetary gear 21 performs gear meshing transmission, while the internal gear 17 is fixed, so that the duplex planetary gear 21 revolves around the central axis of the internal gear 17, the revolving speed is lower than that of the central gear shaft 23, and the direction is consistent with the rotating direction of the central gear shaft 23; the first planetary disk 19 and the second planetary disk 20 are fixedly connected through a planetary disk fixing pin 22, and the first planetary disk 19 and the second planetary disk 20 rotate around the central axis thereof at the same rotating speed and direction as the revolution of the duplex planetary gear 21 under the revolution of the three duplex planetary gears 21; the second planetary plate 20 rotates and drives the output shaft 5 to rotate in the same direction at the same rotating speed; finally, the output shaft 5 outputs power at a rotation speed which coincides with the rotation direction of the main shaft 4 but is lower than that of the main shaft 4.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. The utility model provides a handheld electric drill reduction gear which characterized in that: comprises an outer shell, the outer shell comprises a front sleeve and a tail sleeve which are connected through threads, a main shaft, a planetary gear speed reducing mechanism, an output shaft and a telescopic sleeve are sequentially arranged in the outer shell from the tail sleeve to the front sleeve, the planetary gear speed reducing mechanism comprises a central gear shaft, a plurality of duplex planetary gears, an internal gear and a second planetary disk, the main shaft is fixedly connected with the central gear shaft, the main shaft, the central gear shaft and the outer shell are coaxial, the plurality of duplex planetary gears are circumferentially and uniformly distributed by taking the central gear shaft as a central shaft, the duplex planetary gears are provided with a first gear and a second gear which are coaxial, the diameter of the first gear is smaller than that of the second gear, the first gear is meshed with the gear on the central gear shaft, the internal gear is fixedly connected with the inner wall of the outer shell, and the second gear is meshed with the internal gear, one end of a shaft of the duplex planetary gear is fixedly connected with the second planetary disk, the second planetary disk is fixedly connected with one end of the output shaft, the telescopic sleeve is fixedly connected with the other end of the output shaft, and the outer wall of the telescopic sleeve is in contact with the inner wall of the front sleeve.
2. A hand-held electric drill decelerator as defined by claim 1 further comprising: the duplex planetary gear is coaxial with the central gear shaft, and tooth grooves of the first gear and the second gear in the same duplex planetary gear are aligned.
3. A hand-held electric drill decelerator as defined by claim 1 further comprising: the planetary gear reduction gears still includes first planetary plate, the other end of pair planetary gear's axle with the second planetary plate links firmly, first planetary plate still through a plurality of planetary plate fixed pin with the second planetary plate links firmly, first planetary plate with the second planetary plate all corresponds the planetary plate fixed pin sets up porosely and all with planetary plate fixed pin interference fit.
4. A hand-held electric drill decelerator as defined by claim 1 further comprising: still including being located the tail cover with the drill way jump ring between the front cover, drill way jump ring one side with the front cover with the face laminating of internal gear, opposite side with the tail cover laminating, the internal gear is kept away from the one end of drill way jump ring with the laminating of circular step in the front cover, the one end that the internal gear is close to the drill way jump ring is provided with the lug that inserts in the groove of drill way jump ring.
5. A hand-held electric drill decelerator according to claim 4, wherein: the cover is equipped with first bearing and second bearing on the output shaft, the outer lane of first bearing with the outer lane of second bearing with the inner wall fixed connection of antetheca, first bearing with be provided with bearing washer and skeleton oil blanket between the second bearing, sun gear axle one end pass through the third bearing with second planetary disk normal running fit, the other end pass through the fourth bearing with tail cover normal running fit, the surface of the outer lane of fourth bearing passes through the drill way jump ring with the laminating of the interior step of tail cover.
6. A hand-held electric drill decelerator as defined by claim 1 further comprising: the output shaft is sleeved with a spring retainer ring, a spring is arranged between the telescopic sleeve and the spring retainer ring, three steel balls are arranged between the output shaft and the inner wall of the telescopic sleeve, the three steel balls are distributed along the circumferential surface of the output shaft in the circumferential direction, and a placing hole is formed in the outer wall of the output shaft and corresponds to each steel ball.
7. A hand-held electric drill decelerator as defined by claim 1 further comprising: a clearance groove is formed between the front sleeve and the tail sleeve, and a marking ring is arranged on the clearance groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153114.0U CN211288618U (en) | 2019-12-05 | 2019-12-05 | Speed reducer of handheld electric drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153114.0U CN211288618U (en) | 2019-12-05 | 2019-12-05 | Speed reducer of handheld electric drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288618U true CN211288618U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922153114.0U Active CN211288618U (en) | 2019-12-05 | 2019-12-05 | Speed reducer of handheld electric drill |
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| CN (1) | CN211288618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822028A (en) * | 2019-12-05 | 2020-02-21 | 上海博进医疗器械有限公司 | A hand-held electric drill reducer |
-
2019
- 2019-12-05 CN CN201922153114.0U patent/CN211288618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822028A (en) * | 2019-12-05 | 2020-02-21 | 上海博进医疗器械有限公司 | A hand-held electric drill reducer |
| CN110822028B (en) * | 2019-12-05 | 2025-03-07 | 上海博进医疗器械有限公司 | A handheld electric drill reducer |
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