CN210153186U - Reduction box main shaft mounting structure for direct current brushless motor - Google Patents
Reduction box main shaft mounting structure for direct current brushless motor Download PDFInfo
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- CN210153186U CN210153186U CN201920418305.2U CN201920418305U CN210153186U CN 210153186 U CN210153186 U CN 210153186U CN 201920418305 U CN201920418305 U CN 201920418305U CN 210153186 U CN210153186 U CN 210153186U
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Abstract
The utility model discloses a main shaft mounting structure of a reduction gearbox for a direct current brushless motor, which comprises a mounting seat, wherein the mounting seat is connected with a main shaft, the main shaft comprises an output shaft, a first transmission shaft and a connecting shaft, and a first bearing is arranged between the connecting shaft and the mounting seat; a thrust bearing is sleeved on the connecting shaft, one end of the thrust bearing abuts against the first bearing, and the other end of the thrust bearing abuts against the mounting seat; the first transmission shaft is fixedly connected with a transmission gear, a through hole is formed in the mounting seat, a driving shaft is rotatably connected in the through hole, a driving gear is fixedly connected to the driving shaft, and a three-stage speed reducing mechanism is arranged between the driving gear and the transmission gear. The utility model has the advantages of it is following and effect: the thrust bearing is additionally arranged between the mounting seat and the first bearing, so that the buffer effect is achieved, the axial position degree of the main shaft is improved, the mounting precision is higher, and the damage to the first bearing can be reduced; the power transmission of the three-stage speed reducing mechanism is stable; the wave-shaped pad is arranged, and has the effects of buffering and loosening prevention.
Description
Technical Field
The utility model relates to a reducing gear box technical field, in particular to reducing gear box main shaft mounting structure for direct current brushless motor.
Background
The reduction box is an independent part consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell and is commonly used as a reduction transmission device between a prime mover and a working machine. The function of matching the rotation speed and transmitting the torque between the prime mover and the working machine or the actuating mechanism is very extensive in modern machinery.
The prior Chinese patent with publication number CN108679165A discloses a small-volume reduction gearbox, which comprises a box body, wherein a motor output shaft is arranged in the box body, and the input end of the motor output shaft is fixedly connected with the box body through a bearing. However, the small-volume reduction gearbox has the following defects: when the motor output shaft is driven by the driving device to rotate, the motor output shaft not only can rotate along the circumferential direction, but also can rock back and forth along the axial direction under the axial thrust from left to right to a certain degree, so that the bearing is easy to damage after being collided with the box body for many times.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reducing gear box main shaft mounting structure for DC brushless motor adopts and sets up thrust bearing on the main shaft, makes and offsets indirectly through thrust bearing between first bearing and the mount pad, has the improvement main shaft axial position degree to reduce the effect of first bearing wearing and tearing.
The above technical purpose of the present invention can be achieved by the following technical solutions: a main shaft mounting structure of a reduction box for a direct-current brushless motor comprises a mounting seat, wherein a main shaft is rotatably connected to the mounting seat and comprises an output shaft, a first transmission shaft and a connecting shaft; a thrust bearing is further sleeved on the connecting shaft, one end of the thrust bearing abuts against the first bearing, and the other end of the thrust bearing abuts against the mounting seat; the first transmission shaft is fixedly connected with a transmission gear, a through hole is formed in the mounting seat, a driving shaft is rotatably connected in the through hole, a driving gear is fixedly connected to the driving shaft, and a three-stage speed reducing mechanism is arranged between the driving gear and the transmission gear.
By adopting the technical scheme, when the main shaft transmits power, the driving shaft connected with external equipment rotates, the driving shaft drives the three-stage speed reducing mechanism to transmit through the driving gear, and then the power is transmitted to the transmission gear, so that the main shaft rotates. At the main shaft rotation in-process, the main shaft wholly can rock along the main shaft axial to a certain extent, at the in-process connecting axle of rocking drive first bearing to thrust bearing motion and to thrust bearing production extrusion force, thus, set up thrust bearing between mount pad and first bearing, relative prior art, avoided first bearing and mount pad direct looks striking to a certain extent, thrust bearing has the buffering effect to the extrusion force of first bearing, the axial position degree of main shaft has been improved, the installation accuracy is higher, thereby can reduce the damage degree of first bearing greatly in the use.
The utility model discloses a further set up to: the three-stage speed reducing mechanism comprises an input shaft and a second transmission shaft, wherein a first gear meshed with the driving gear is fixedly connected to the input shaft, and a second gear meshed with the transmission gear is fixedly connected to the second transmission shaft; a primary planet wheel component, a secondary planet wheel component and a tertiary planet wheel component are sequentially arranged between the input shaft and the second transmission shaft; the primary planet gear assembly comprises a primary planet carrier, a primary planet gear and a primary sun gear, wherein the primary planet gear is arranged on the primary planet carrier, the primary sun gear is fixedly connected to the input shaft, and the primary sun gear is meshed with the primary planet gear; the secondary planet gear assembly comprises a secondary planet carrier, a secondary planet gear arranged on the secondary planet carrier and a secondary sun gear fixedly connected to the primary planet carrier, and the secondary sun gear is meshed with the secondary planet gear; the third-stage planet wheel assembly comprises a third-stage planet carrier, a third-stage planet gear arranged on the third-stage planet carrier and a third-stage sun gear fixedly connected to the second-stage planet carrier, and the third-stage sun gear is meshed with the third-stage planet gear; the second transmission shaft is fixedly connected to the third-stage planet carrier.
Through adopting above-mentioned technical scheme, when the input shaft is rotatory under the drive of drive shaft, it is rotatory to drive one-level sun gear, because one-level sun gear meshes with one-level planetary gear mutually, so one-level planetary gear drives one-level planet carrier rotation, it is rotatory to drive the second grade sun gear when one-level planet carrier rotates, because the second grade sun gear meshes with the second grade planetary gear mutually, so the second grade planetary gear drives the rotation of second grade planet carrier, tertiary sun gear is rotatory along with it, it rotates rather than the tertiary planetary gear who meshes to drive when tertiary sun gear is rotatory, tertiary planetary gear drives tertiary planet carrier rotation and drives the rotation of second transmission shaft simultaneously, so, can make the main shaft rotatory through the transmission cooperation of second gear and drive gear, power transmission is more stable.
The utility model discloses a further set up to: the center of the first-level planet carrier is provided with a center hole along the axial direction, the first-level sun gear is provided with a center shaft, and the center shaft is matched with the center hole in a positioning mode.
By adopting the technical scheme, when the primary sun gear is meshed with the primary planet gear, the central shaft is inserted into the central hole, so that the primary sun gear can be positioned, and the transmission stability is improved.
The utility model discloses a further set up to: a plurality of fan-shaped grooves are formed in the first-stage planet carrier.
Through adopting above-mentioned technical scheme, set up the use of the reducible raw and other materials of fan-shaped recess to alleviate the self weight of one-level planet carrier, have the effect of practicing thrift the energy consumption.
The utility model discloses a further set up to: a wave-shaped pad is arranged between the first bearing and the thrust bearing.
Through adopting above-mentioned technical scheme, when the main shaft drove first bearing to thrust bearing extrusion, the wave form was filled up and can be played the effect of slow shock, and when the main shaft normally rotated, the wave form was filled up and still can be played locking effect not hard up.
The utility model discloses a further set up to: the end face of the first transmission shaft is provided with a resisting step which is propped against the end face of the first bearing.
Through adopting above-mentioned technical scheme, keep out the step and support in the terminal surface of first bearing, can play the spacing effect of axial to first bearing, can prevent to a certain extent that first bearing from following main shaft endwise slip.
The utility model discloses a further set up to: the side wall of the output shaft is provided with a waist-shaped key groove.
Through adopting above-mentioned technical scheme, external equipment accessible waist type keyway and output shaft fixed connection, connect convenient and firm.
To sum up, the utility model discloses following beneficial effect has:
1. the thrust bearing is additionally arranged between the mounting seat and the first bearing, so that the thrust bearing has a buffering effect on the extrusion force of the first bearing, the first bearing and the mounting seat are prevented from directly impacting with each other to a certain extent, the axial position degree of the main shaft is improved, the mounting precision is higher, and the damage degree of the first bearing can be greatly reduced in the using process;
2. stable power transmission can be realized by adopting a three-stage speed reducing mechanism;
3. the wave-shaped pad is arranged between the first bearing and the thrust bearing, so that the shock-absorbing effect is achieved, and the anti-loosening effect can be achieved.
Drawings
Fig. 1 is a sectional view of the internal structure of the embodiment.
Fig. 2 is an exploded structural relationship diagram of the three-stage speed reducing mechanism in the embodiment.
In the figure: 1. a mounting seat; 11. a through hole; 2. a drive shaft; 21. a drive gear; 3. a main shaft; 31. an output shaft; 311. a kidney-shaped key slot; 32. a first drive shaft; 321. a transmission gear; 322. a second bearing; 323. a resisting step; 33. a connecting shaft; 331. a first bearing; 332. a wave pad; 4. a thrust bearing; 5. an input shaft; 51. a first gear; 6. a second drive shaft; 61. a second gear; 7. a primary planet wheel assembly; 71. a primary planet carrier; 711. a central bore; 72. a primary planetary gear; 73. a primary sun gear; 731. a central shaft; 8. a secondary planet wheel assembly; 81. a secondary planet carrier; 82. a secondary planetary gear; 83. a secondary sun gear; 9. a third-stage planet wheel assembly; 91. a third-stage planet carrier; 92. a third-stage planetary gear; 93. a third-stage sun gear; 10. and (4) a groove.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A main shaft mounting structure of a reduction gearbox for a direct current brushless motor is shown in figure 1 and comprises a mounting seat 1, wherein a through hole 11 is formed in the mounting seat 1, a driving shaft 2 is rotatably connected in the through hole 11, and a driving gear 21 is fixedly connected to the driving shaft 2; the mounting seat 1 is rotatably connected with a main shaft 3, the main shaft 3 comprises an output shaft 31, a first transmission shaft 32 and a connecting shaft 33, a waist-shaped key slot 311 is formed in the side wall of the output shaft 31, and external equipment can be fixedly connected with the output shaft 31 through the waist-shaped key slot 311, so that the connection is convenient and firm; a transmission gear 321 and a second bearing 322 are fixedly connected to the first transmission shaft 32; a first bearing 331 is arranged between the connecting shaft 33 and the mounting base 1, in this embodiment, the first bearing 331 is a ball bearing, the inner wall of the first bearing 331 is fixedly connected with the connecting shaft 33, the outer wall of the first bearing 331 is fixedly connected with the mounting base 1, a retaining step 323 is arranged on the end surface of the first transmission shaft 32 close to the first bearing 331, the retaining step 323 abuts against the end surface of the first bearing 331, an axial limiting effect can be achieved on the first bearing 331, and the first bearing 331 can be prevented from axially sliding along the main shaft 3 to a certain extent; the connecting shaft 33 is further sleeved with a thrust bearing 4, one end of the thrust bearing 4 abuts against an end face of the first bearing 331, the other end of the thrust bearing 4 abuts against the mounting seat 1, and a wave-shaped pad 332 is arranged between the first bearing 331 and the thrust bearing 4.
As shown in fig. 1 and fig. 2, a three-stage speed reducing mechanism is arranged between the driving gear 21 and the transmission gear 321, the three-stage speed reducing mechanism comprises an input shaft 5 and a second transmission shaft 6 which are coaxially arranged, a first gear 51 meshed with the driving gear 21 is fixedly connected to the input shaft 5, and a second gear 61 meshed with the transmission gear 321 is fixedly connected to the second transmission shaft 6; a primary planet wheel component 7, a secondary planet wheel component 8 and a tertiary planet wheel component 9 which are coaxial are sequentially arranged between the input shaft 5 and the second transmission shaft 6; the primary planet gear assembly 7 comprises a primary planet carrier 71, a primary planet gear 72 arranged on the primary planet carrier 71 and a primary sun gear 73 fixedly connected to the input shaft 5, and the primary sun gear 73 is meshed with the primary planet gear 72; the secondary planet wheel assembly 8 comprises a secondary planet carrier 81, a secondary planet gear 82 arranged on the secondary planet carrier 81 and a secondary sun gear 83 fixedly connected to the primary planet carrier 71, wherein the secondary sun gear 83 is meshed with the secondary planet gear 82, and the secondary sun gear 83 is arranged on the back surface of the primary planet carrier 71; the third-stage planet gear assembly 9 comprises a third-stage planet carrier 91, a third-stage planet gear 92 arranged on the third-stage planet carrier 91 and a third-stage sun gear 93 fixedly connected to the second-stage planet carrier 81, the third-stage sun gear 93 is meshed with the third-stage planet gear 92, and the third-stage sun gear 93 is arranged on the back surface of the second-stage planet carrier 81; the second transmission shaft 6 is fixedly connected to the center of the third-stage planet carrier 91. The center of the first-stage planet carrier 71 and the center of the second-stage planet carrier 81 are both provided with a center hole 711 along the axial direction, the first-stage sun gear 73 and the second-stage sun gear 83 are both provided with a center shaft 731, when the sun gears are meshed with the planetary gears, the center shaft 731 is inserted into the center hole 711, and therefore the first-stage sun gear 73 and the second-stage sun gear 83 can be positioned, and the transmission stability is improved. In addition, all seted up the fan-shaped recess 10 of a plurality of on one-level planet carrier 71, second grade planet carrier 81 and the tertiary planet carrier 91, set up the use of the reducible raw and other materials of fan-shaped recess 10 to alleviate the self weight of one-level planet carrier 71, second grade planet carrier 81 and tertiary planet carrier 91, have the effect of practicing thrift the energy consumption.
When the main shaft 3 is in power transmission, the driving shaft 2 connected with the driving device rotates, the driving shaft 2 drives the input shaft 5 to rotate through the driving match of the driving gear 21 and the first gear 51, when the input shaft 5 rotates under the driving of the driving shaft 2, the first-stage sun gear 73 is driven to rotate, as the first-stage sun gear 73 is meshed with the first-stage planet gear 72, the first-stage planet gear 72 drives the first-stage planet carrier 71 to rotate, and as the first-stage planet carrier 71 rotates, the second-stage sun gear 83 is driven to rotate, and as the second-stage planet carrier 81 and the third-stage planet carrier 91 are in the same transmission, the description is omitted. The third-stage planet carrier 91 rotates and simultaneously drives the second transmission shaft 6 to rotate, so that the main shaft 3 can rotate through the transmission matching of the second gear 61 and the transmission gear 321, and the power transmission is stable. In the rotating process of the main shaft 3, the whole main shaft 3 can shake along the axial direction of the main shaft 3 to a certain extent, the first bearing 331 is driven to move towards the thrust bearing 4 and generate extrusion force to the thrust bearing 4 in the shaking process, so the thrust bearing 4 is arranged between the mounting seat 1 and the first bearing 331, compared with the prior art, the first bearing 331 and the mounting seat 1 are prevented from directly colliding with each other to a certain extent, the extrusion force of the thrust bearing 4 to the first bearing 331 has a buffering effect, the axial position degree of the main shaft 3 is improved, the mounting precision is higher, the damage degree of the first bearing 331 can be greatly reduced in the using process, in addition, when the main shaft 3 drives the first bearing 331 to extrude towards the thrust bearing 4, the waveform pad 332 can play a role of buffering impact, and when the main shaft 3 normally rotates, the waveform pad 332 can also play a role of looseness prevention.
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 (7)
1. The utility model provides a reducing gear box main shaft mounting structure for DC brushless motor, including mount pad (1), its characterized in that: the mounting seat (1) is rotatably connected with a main shaft (3), the main shaft (3) comprises an output shaft (31), a first transmission shaft (32) and a connecting shaft (33), a first bearing (331) is arranged between the connecting shaft (33) and the mounting seat (1), the inner wall of the first bearing (331) is fixedly connected with the connecting shaft (33), and the outer wall of the first bearing (331) is fixedly connected with the mounting seat (1); a thrust bearing (4) is further sleeved on the connecting shaft (33), one end of the thrust bearing (4) abuts against the first bearing (331), and the other end of the thrust bearing (4) abuts against the mounting seat (1); fixedly connected with drive gear (321) on first transmission shaft (32), through hole (11) have been seted up on mount pad (1), through hole (11) internal rotation is connected with drive shaft (2), fixedly connected with drive gear (21) on drive shaft (2), drive gear (21) with be provided with tertiary reduction gears between drive gear (321).
2. The reduction gearbox spindle mounting structure for a brushless dc motor according to claim 1, wherein: the three-stage speed reducing mechanism comprises an input shaft (5) and a second transmission shaft (6), a first gear (51) meshed with the driving gear (21) is fixedly connected to the input shaft (5), and a second gear (61) meshed with the transmission gear (321) is fixedly connected to the second transmission shaft (6); a primary planet wheel assembly (7), a secondary planet wheel assembly (8) and a tertiary planet wheel assembly (9) are sequentially arranged between the input shaft (5) and the second transmission shaft (6); the primary planet wheel assembly (7) comprises a primary planet carrier (71), a primary planet gear (72) arranged on the primary planet carrier (71) and a primary sun gear (73) fixedly connected to the input shaft (5), and the primary sun gear (73) is meshed with the primary planet gear (72); the secondary planet wheel assembly (8) comprises a secondary planet carrier (81), a secondary planet gear (82) arranged on the secondary planet carrier (81) and a secondary sun gear (83) fixedly connected to the primary planet carrier (71), and the secondary sun gear (83) is meshed with the secondary planet gear (82); the three-stage planetary wheel assembly (9) comprises a three-stage planet carrier (91), a three-stage planetary gear (92) arranged on the three-stage planet carrier (91) and a three-stage sun gear (93) fixedly connected to the second-stage planet carrier (81), and the three-stage sun gear (93) is meshed with the three-stage planetary gear (92); the second transmission shaft (6) is fixedly connected to the third-stage planet carrier (91).
3. A reduction gearbox spindle mounting structure for a dc brushless motor according to claim 2, characterized in that: the center of the primary planet carrier (71) is provided with a center hole (711) along the axial direction, the primary sun gear (73) is provided with a center shaft (731), and the center shaft (731) is matched with the center hole (711) in a positioning mode.
4. A reduction gearbox spindle mounting structure for a dc brushless motor according to claim 2, characterized in that: a plurality of fan-shaped grooves (10) are formed in the first-stage planet carrier (71).
5. The reduction gearbox spindle mounting structure for a brushless dc motor according to claim 1, wherein: a wave-shaped pad (332) is arranged between the first bearing (331) and the thrust bearing (4).
6. The reduction gearbox spindle mounting structure for a brushless dc motor according to claim 1, wherein: the end face of the first transmission shaft (32) is provided with a blocking step (323), and the blocking step (323) abuts against the end face of the first bearing (331).
7. The reduction gearbox spindle mounting structure for a brushless dc motor according to claim 1, wherein: the side wall of the output shaft (31) is provided with a waist-shaped key groove (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920418305.2U CN210153186U (en) | 2019-03-29 | 2019-03-29 | Reduction box main shaft mounting structure for direct current brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920418305.2U CN210153186U (en) | 2019-03-29 | 2019-03-29 | Reduction box main shaft mounting structure for direct current brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210153186U true CN210153186U (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920418305.2U Active CN210153186U (en) | 2019-03-29 | 2019-03-29 | Reduction box main shaft mounting structure for direct current brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210153186U (en) |
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2019
- 2019-03-29 CN CN201920418305.2U patent/CN210153186U/en active Active
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