CN210265715U - Transmission device for a hand-held power tool - Google Patents
Transmission device for a hand-held power tool Download PDFInfo
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- CN210265715U CN210265715U CN201821361536.6U CN201821361536U CN210265715U CN 210265715 U CN210265715 U CN 210265715U CN 201821361536 U CN201821361536 U CN 201821361536U CN 210265715 U CN210265715 U CN 210265715U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000004880 explosion Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
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Abstract
本实用新型提供的一种手持式工具机的传动装置，包括齿轮箱壳体、第一齿轮组、第一齿圈、第二齿轮组、第二齿圈和切换装置，其中切换装置包括操作组件和切换件，旋转操作组件切换该切换件在第一位置、第二位置和第三位置之间运动。本实用新型提供一种手持式工具机的传动装置，具有较宽的速度调节范围和紧凑的机身，提高了手持式工具机的传动精度，增大了使用者的使用范围和操作舒适度，降低了手持式工具机制造成本和装配难度。
The utility model provides a transmission device of a hand-held power tool, which comprises a gearbox casing, a first gear group, a first gear ring, a second gear group, a second gear ring and a switching device, wherein the switching device includes an operating assembly and a switching member, the rotary operating assembly switches the switching member to move between the first position, the second position and the third position. The utility model provides a transmission device for a hand-held power tool, which has a wide speed adjustment range and a compact body, improves the transmission accuracy of the hand-held power tool, and increases the use range and operation comfort of users. The manufacturing cost and assembly difficulty of the hand-held power tool are reduced.
Description
Technical Field
The present invention relates to a hand-held power tool, such as a rotatable drill, an electric screwdriver and a rotatable cutting tool, in particular to a transmission of a hand-held power tool.
Background
The hand-held power tools known in the state of the art generally have a variable output speed, so that the user of these tools can control the output speed of the hand-held power tool sufficiently precisely in order to be able to carry out a plurality of operations without the aid of additional tools.
However, most current hand-held power tools have a limited adjustable speed range, and in particular, when drilling operations are to be performed efficiently at high rotational speeds and low torques, the speed range cannot meet the user's requirements. Moreover, multi-speed adjustment, particularly three-speed adjustment, generally adopts a three-stage gear set for speed reduction, the structure is complex, the axial size is large, the overall size of the hand-held machine tool is increased, the assembly difficulty is increased, and the transmission precision is reduced.
Disclosure of Invention
The utility model provides a transmission of hand-held type machine tool has the speed control scope and the compact fuselage of broad, has improved hand-held type machine tool's transmission precision, has increased user's application range and operating comfort, has reduced hand-held type machine tool manufacturing cost and the assembly degree of difficulty.
In order to achieve the above object, according to one aspect of the present invention, there is provided a transmission device of a hand-held power tool, comprising: the gearbox shell comprises a front gearbox shell and a rear gearbox shell, wherein the front gearbox shell is provided with a groove extending along the axial direction, and the inner circumferential surface of the gearbox shell is provided with a plurality of ribs; the first planetary gear set comprises a first sun gear, a first planetary gear and a second planetary gear, wherein the first planetary gear and the second planetary gear are rotatably arranged on one side of the first sun gear, and the first planetary gear and the second planetary gear are separated from each other by a certain distance along the axial direction; the first gear ring is provided with first external teeth, first internal teeth and a first ring groove, wherein the first ring groove is positioned on the outer circumferential surface of the first gear ring; the third planet wheel and the fourth planet wheel are rotatably arranged on one side of the second sun wheel, the third planet wheel and the fourth planet wheel are spaced at a certain distance along the axial direction, and the output shaft extends outwards from the other side of the second sun wheel; the second gear ring is provided with a second external tooth, a second internal tooth and a second ring groove, wherein the second ring groove is positioned on the outer circumferential surface of the second gear ring; the switching device comprises an operating assembly and a switching piece, and the switching piece is switched to move among a first position, a second position and a third position by rotating the operating assembly.
The utility model discloses a further scheme, the operating means is the switching ring, be equipped with a plurality of first V type grooves on the switching ring, the switching piece is a plurality of switching round pins, the switching round pin is located pass in the first V type groove the recess is used in first annular and the second annular.
The utility model discloses a further scheme, the operation subassembly is dialled for switching and is turned round, it is equipped with a plurality of second V type grooves to switch to dial to turn round, it is the swing frame to switch the piece, the both ends of swing frame are passed the recess is used in first annular and the second annular, just but the middle part relative movement ground of swing frame inserts in the second V type groove.
The utility model discloses a further scheme still includes motor gear, motor gear includes the third external tooth that is close to the motor and is close to the fourth external tooth of output shaft, just the diameter of third external tooth is greater than the diameter of fourth external tooth, wherein the third external tooth with first planet wheel meshing, the fourth external tooth with the second planet wheel meshing.
The utility model discloses a further scheme, when switching the piece and being located the first position, transmission operates under first rotational speed, when switching the piece and being located the second position, transmission operates under the second rotational speed, when switching the piece and being located the third position, transmission operates under the third rotational speed.
The utility model discloses a further scheme, first rotational speed is less than the second rotational speed, the second rotational speed is less than the third rotational speed.
The utility model discloses a further scheme, during the first position, the first internal tooth of first ring gear with the meshing of second planet wheel, the second internal tooth of second ring gear with the meshing of fourth planet wheel.
The utility model discloses a further scheme, during the second position, the first internal tooth of first ring gear with first planet wheel meshing, the second internal tooth of second ring gear with third planet wheel meshing.
The utility model discloses a further scheme, be equipped with the fifth external tooth on the outline of first sun gear.
The utility model discloses a further scheme, during the third position, the first internal tooth of first ring gear with the meshing of second planet wheel, the second internal tooth of second ring gear with the third planet wheel with fifth external tooth on the first sun gear meshes simultaneously.
The utility model discloses a further scheme, first external tooth on the first ring gear and the second external tooth on the second ring gear with the muscle position cooperation of gear box shell internal surface makes first ring gear and second ring gear are fixed in the gear box shell.
The utility model discloses a further scheme, still be equipped with the sixth external tooth on the first sun gear, the sixth external tooth is located on the first sun gear the relative one side of first planet wheel and second planet wheel place side, the sixth external tooth with the cooperation of third planet wheel is connected.
After the technical scheme is adopted, the utility model has the advantages of as follows:
1. wide speed regulating range
2. Compact fuselage
3. Higher transmission precision
4. The manufacturing cost and the assembly difficulty are reduced.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a partial explosion according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the first sun gear in fig. 1 according to the present invention.
Fig. 3 is a schematic structural diagram of a second sun gear in fig. 1 according to the present invention.
Fig. 4 is a partial cross-sectional view of the switch pin of fig. 1 in a first position in accordance with the present invention.
Fig. 5 is a schematic structural diagram of the switching ring of fig. 4 according to the present invention.
Fig. 6 is a partial cross-sectional view of the switch pin of fig. 1 in a second position in accordance with the present invention.
Fig. 7 is a schematic structural diagram of the switching ring of fig. 6 according to the present invention.
Fig. 8 is a partial cross-sectional view of the switch pin of fig. 1 in a third position in accordance with the present invention.
Fig. 9 is a schematic structural view of the switching ring of fig. 8 according to the present invention.
Fig. 10 is a schematic view of a partial explosion according to another embodiment of the present invention.
Fig. 11 is a schematic diagram of the switching method in fig. 10 according to the present invention.
Fig. 12 is a schematic diagram of the switching toggle button in fig. 11 according to the present invention.
Detailed Description
The transmission device of a hand-held power tool according to an embodiment of the present invention is, as shown in fig. 1, located between the motor 150 and the output shaft 40, and configured to adjustably transmit the rotation speed of the motor 150 to the output shaft 40, so as to drive the working head at the end of the output shaft 40 to work. The transmission device comprises a gear box shell, wherein a plurality of rib positions 12 are arranged on the inner circumferential surface of the gear box shell. The gearbox housing comprises a front gearbox housing 10 and a rear gearbox housing 140, and the two are detachably connected together by fixing pins 160. The front gearbox shell 10 is provided with a groove 11 extending along the axial direction, and the groove 11 is a through groove penetrating through the inner surface and the outer surface of the front gearbox shell 10. The rear gear box 140 is connected to a motor 150, and a motor gear 130 is connected to an output end of the motor 150, wherein the motor gear 130 includes third outer teeth 131 adjacent to the motor 150 and fourth outer teeth 132 adjacent to the output shaft 40, and a diameter of the third outer teeth 131 is larger than a diameter of the fourth outer teeth 132.
The transmission further comprises a first gear set 1, as shown in fig. 1 and 2, the first gear set 1 comprising a first sun gear 90, a first planet gear 120 and a second planet gear 110, wherein the first planet gear 120 meshes with a third outer tooth 131 of the motor gear 130 and the second planet gear 110 meshes with a fourth outer tooth 132 of the motor gear 130. The first planet gear 120 and the second planet gear 110 are rotatably mounted on one side of the first sun gear 90, and the first planet gear 120 and the second planet gear 110 are axially spaced apart by a distance, in this embodiment, a first boss 93 is provided on the first sun gear 90, and the first planet gear 120 is positioned on the first boss 93 by a first planet pin 94, so that the first planet gear 120 and the second planet gear 110 are axially offset from each other and are spaced apart by a certain distance. The outer contour of the first sun gear is further provided with fifth external teeth 92 and sixth external teeth 96, wherein the sixth external teeth are located on the opposite side of the first sun gear where the first planet gear and the second planet gear are located, and the diameter of the fifth external teeth 92 is larger than that of the sixth external teeth 96.
The transmission also comprises a first ring gear 100, which first ring gear 100 has a first outer toothing 101, a first inner toothing 103 and a first ring groove 102. The first external teeth 101 are engaged with the rib portions 12 on the inner surface of the gear case housing so that the first ring gear 100 is fixed in the gear case. The first ring groove 102 is located on the outer circumferential surface of the first ring gear 100. The first internal toothing 103 is movably mounted outside the first sun wheel 90 and can be moved selectively into engagement with either the first planetary gear 120 or the second planetary gear 110 for speed control by switching the first ring groove 102.
The transmission further comprises a second gear set 2, as shown in fig. 1 and 3, comprising a second sun gear 50, a third planet gear 80 and a fourth planet gear 70, wherein the transmission teeth 91 of the first sun gear 90 are engaged with the fourth planet gear 70, and the sixth external teeth 96 of the first sun gear 90 are connected with the third planet gear 80 in a matching manner. The third and fourth planets 80, 70 are rotatably mounted on one side of the second sun gear 50, and the output shaft 40 extends outwardly from the other side of the second sun gear 50. The third planet 80 and the fourth planet 70 are axially spaced apart by a distance, in this embodiment by providing a second boss 53 on the second sun gear 50, and the third planet 80 is positioned on the second boss 53 by the third planet pin 52 such that the third planet 80 and the fourth planet 70 are axially offset from each other and spaced apart by a distance.
The transmission further comprises a second ring gear 60, which second ring gear 60 has a second outer toothing 61, a second inner toothing 63 and a second ring groove 62. The second external teeth 61 are engaged with the rib portions 12 on the inner surface of the gear case housing so that the second ring gear 60 is fixed in the gear case. The second ring groove 62 is located on an outer circumferential surface of the second ring gear 60. The second internal teeth 60 are movably mounted on the outside of the second sun gear 50, and speed control is performed by switching a plurality of meshing combinations of the second ring groove 62 which can be selectively meshed with the third planetary gear 80, the fourth planetary gear 70, and the fifth external teeth 92 on the first sun gear during movement.
This transmission still includes auto-change over device, and this auto-change over device includes operating element and switching piece, the utility model discloses a in the first embodiment, switching element is for switching the ring, and switching piece is a plurality of switching round pins. The switching ring 20 is provided with a plurality of first V-shaped grooves, and in the present embodiment, four first V-shaped grooves with openings facing the direction of the output shaft 40 are preferably adopted. The present embodiment preferably employs four switching pins, only the switching pins 23, 24 are shown, and the other group and the symmetrical distribution thereof are not shown in the drawings, as can be understood by those skilled in the art from the technical literature presently disclosed. The switching pins 23, 24 act in the first V-groove through the recess 11 in the front gearbox housing 10 in the first and second ring grooves 102, 62, respectively. The rotary switching ring 20 controls the movement of the switching pins 23, 24 between the first position, the second position and the third position. For the convenience of user operation, the present embodiment preferably provides a toggle 30 on the exterior of the switching ring 20, the toggle 30 is fixedly connected to the switching ring 20, and the user can control the switching pins 23, 24 to move between the first position, the second position and the third position by rotating the toggle 30. When the switch pin is in the first position, the transmission device runs at a first rotating speed; when the switch pin is located at the second position, the transmission device runs at a second rotating speed; when the switch pin is located at the third position, the transmission device operates at a third rotating speed, the first rotating speed is lower than the second rotating speed, and the second rotating speed is lower than the third rotating speed.
As shown in fig. 4 and 5, when the switching pin is in the first position, the first internal teeth 103 of the first ring gear 100 mesh with the second planetary gear 110, while the second internal teeth 63 of the second ring gear 60 mesh with the fourth planetary gear 70. At this time, the fourth external teeth 132 on the motor gear 130 drives the second planet gear 110 to rotate, and the second planet gear 110 is output outwards through the transmission teeth 91 on the first sun gear 90 after being decelerated by the first ring gear 100, the transmission teeth 91 are meshed with the fourth planet gear 70 and the second ring gear 60 on the second planet gear 50, and the first speed is output to the output shaft 40 after being decelerated by the second ring gear 60.
As shown in fig. 6 and 7, when the switching pins are located at the second position, the first internal teeth 103 of the first ring gear 100 mesh with the first planetary gears 120, while the second internal teeth 63 of the second ring gear 60 mesh with the third planetary gears 80. At this time, the fourth external teeth 132 on the motor gear 130 drive the first planet gears 120 to rotate, and then the speed of the first ring gear 100 is reduced to be output through the transmission teeth 91 on the first sun gear 90. The sixth external teeth 96 of the first sun gear mesh with the second internal teeth 63 of the third planetary gear 80 and the second ring gear 60, and the second external teeth are transmitted to the second sun gear 50 and output to the output shaft, and finally output to the output shaft 40 at the second speed.
As shown in fig. 8 and 9, when the switching pin is in the third position, the first internal teeth 103 of the first ring gear 100 mesh with the second planet gears 110, and the second internal teeth 63 of the second ring gear 60 mesh with the third planet gears 80 and the fifth external teeth 92 of the first sun gear 90 at the same time. At this time, the third external teeth 131 on the motor gear 130 drive the second planet gear 110 to rotate, and then the second planet gear is decelerated by the first ring gear 100, output to the second sun gear 50 through the first sun gear 90, and finally output to the output shaft 40 at a third speed.
The transmission device of the hand-held power tool according to another embodiment of the present invention, as shown in fig. 10 to 12, is located between the motor and the output shaft, and is configured to adjustably transmit the rotational speed of the motor to the output shaft, thereby driving the working head at the end of the output shaft to work. The transmission device comprises a gear box shell, wherein a plurality of rib positions are arranged on the inner circumferential surface of the gear box shell. The gearbox housing includes a front gearbox housing and a rear gearbox housing, and both are detachably connected together by a fixing pin. The front gearbox shell is provided with grooves (161, 162) extending along the axial direction, and the grooves (161, 162) are through grooves penetrating through the inner surface and the outer surface of the front gearbox shell. The rear gear box is connected to the motor, and the output of motor is connected with motor gear, and this motor gear includes the third external tooth that is close to the motor and the fourth external tooth that is close to the output shaft, and wherein the diameter of third external tooth is greater than the diameter of fourth external tooth.
The transmission further comprises a first gear set 1, which first gear set 1 comprises a first sun gear 90, a first planet gear 120 and a second planet gear 110, wherein the first planet gear 120 meshes with a third external toothing 131 of the motor gear 130 and the second planet gear 110 meshes with a fourth external toothing 132 of the motor gear 130. The first planet gear 120 and the second planet gear 110 are rotatably mounted on one side of the first sun gear 90, and the first planet gear 120 and the second planet gear 110 are axially spaced apart by a distance, in this embodiment, a first boss 93 is provided on the first sun gear 90, and the first planet gear 120 is positioned on the first boss 93 by a first planet pin 94, so that the first planet gear 120 and the second planet gear 110 are axially offset from each other and are spaced apart by a certain distance. The outer contour of the first sun gear is further provided with fifth external teeth 92 and sixth external teeth 96, wherein the sixth external teeth are located on the opposite side of the first sun gear where the first planet gear and the second planet gear are located, and the diameter of the fifth external teeth 92 is larger than that of the sixth external teeth 96.
The transmission also comprises a first ring gear 100, which first ring gear 100 has a first outer toothing 101, a first inner toothing 103 and a first ring groove 102. The first external teeth 101 are engaged with the rib portions 12 on the inner surface of the gear case housing so that the first ring gear 100 is fixed in the gear case. The first ring groove 102 is located on the outer circumferential surface of the first ring gear 100. The first internal toothing 103 is movably mounted outside the first sun wheel 90 and can be moved selectively into engagement with either the first planetary gear 120 or the second planetary gear 110 for speed control by switching the first ring groove 102.
The transmission device further comprises a second gear set 2 comprising a second sun gear 50, a third planetary gear 80 and a fourth planetary gear 70, wherein the transmission teeth 91 on the first sun gear 90 are meshed with the fourth planetary gear 70, and the sixth external teeth 96 on the first sun gear 90 are connected with the third planetary gear 80 in a matching manner. The third and fourth planets 80, 70 are rotatably mounted on one side of the second sun gear 50, and the output shaft 40 extends outwardly from the other side of the second sun gear 50. The third planet 80 and the fourth planet 70 are axially spaced apart by a distance, in this embodiment by providing a second boss 53 on the second sun gear 50, and the third planet 80 is positioned on the second boss 53 by the third planet pin 52 such that the third planet 80 and the fourth planet 70 are axially offset from each other and spaced apart by a distance.
The transmission further comprises a second ring gear 60, which second ring gear 60 has a second outer toothing 61, a second inner toothing 63 and a second ring groove 62. The second outer teeth 61 are in a rib position fit connection with the inner surface of the gearbox housing, so that the second gear ring 60 is fixed in the gearbox housing. The second ring groove 62 is located on an outer circumferential surface of the second ring gear 60. The second internal teeth 60 are movably mounted on the outside of the second sun gear 50, and speed control is performed by switching a plurality of meshing combinations of the second ring groove 62 which can be selectively meshed with the third planetary gear 80, the fourth planetary gear 70, and the fifth external teeth 92 on the first sun gear during movement.
The transmission device further comprises a switching device, the switching device comprises an operating component and a switching piece, in another embodiment of the utility model, the operating component is used for switching the toggle, and the switching piece is a swing frame (181, 182). Wherein, switch and dial and be equipped with a plurality of second V type grooves (171, 172) on the knob 180, the both ends of swing frame (181, 182) are passed recess (161, 162) and are acted on in first annular and second annular, and the middle part of swing frame (181, 182) inserts in second V type groove (171, 172) with relatively moving. The rotary toggle knob 180 controls movement of the swing frame (181, 182) between the first position, the second position, and the third position. When the swing frame is located at the first position, the transmission device runs at a first rotating speed; when the swing frame is located at the second position, the transmission device runs at a second rotating speed; when the swing frame is located at the third position, the transmission device operates at a third rotating speed, the first rotating speed is lower than the second rotating speed, and the second rotating speed is lower than the third rotating speed.
As shown in fig. 11-12, when the swing frame is in the third position, the first inner teeth of the first ring gear are engaged with the second planetary gears, and the second inner teeth of the second ring gear are engaged with the third planetary gears and the fifth outer teeth of the first sun gear at the same time, so as to output a third rotation speed. It will be apparent to those skilled in the art from this disclosure that the connection relationship between the swing frame, the first gear ring, the second gear ring, etc. in the first position and the second position of another embodiment of the present invention will not be described herein.
To sum up, the utility model provides a transmission of hand-held type machine tool has the speed control scope and the compact fuselage of broad, has improved the transmission precision of hand-held type machine tool, has increased user's application range and operating comfort, has reduced hand-held type machine tool manufacturing cost and the assembly degree of difficulty.
The disclosed embodiments are not limited to the embodiments shown herein. Any modification, equivalent replacement, improvement and the like made by the utility model shall belong to the protection scope of the utility model.
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821361536.6U CN210265715U (en) | 2018-08-23 | 2018-08-23 | Transmission device for a hand-held power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821361536.6U CN210265715U (en) | 2018-08-23 | 2018-08-23 | Transmission device for a hand-held power tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265715U true CN210265715U (en) | 2020-04-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821361536.6U Withdrawn - After Issue CN210265715U (en) | 2018-08-23 | 2018-08-23 | Transmission device for a hand-held power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210265715U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027147A (en) * | 2018-08-23 | 2018-12-18 | 浙江皇冠电动工具制造有限公司 | The transmission device of hand held power machine |
| CN119244703A (en) * | 2024-12-09 | 2025-01-03 | 河南省瑞歌传动机械有限公司 | A high-precision planetary small-tooth difference reduction mechanism |
-
2018
- 2018-08-23 CN CN201821361536.6U patent/CN210265715U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027147A (en) * | 2018-08-23 | 2018-12-18 | 浙江皇冠电动工具制造有限公司 | The transmission device of hand held power machine |
| CN109027147B (en) * | 2018-08-23 | 2023-11-17 | 浙江皇冠电动工具制造有限公司 | Transmission device of hand-held machine tool |
| CN119244703A (en) * | 2024-12-09 | 2025-01-03 | 河南省瑞歌传动机械有限公司 | A high-precision planetary small-tooth difference reduction mechanism |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Transmission device of handheld tool machine Effective date of registration: 20230924 Granted publication date: 20200407 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jinhua Economic Development Zone Branch Pledgor: Zhejiang Crown Electric Tools Manufacture Co.,Ltd. Registration number: Y2023980058538 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200407 Effective date of abandoning: 20231117 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200407 Effective date of abandoning: 20231117 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20200407 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jinhua Economic Development Zone Branch Pledgor: Zhejiang Crown Electric Tools Manufacture Co.,Ltd. Registration number: Y2023980058538 |