CN218494154U

CN218494154U - Low-noise multi-head worm and multi-stage gear reduction actuator

Info

Publication number: CN218494154U
Application number: CN202222478553.0U
Authority: CN
Inventors: 白妮
Original assignee: Ningbo Henghe Precision Industry Co ltd
Current assignee: Ningbo Henghe Precision Industry Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-02-17
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses a bull worm and multistage gear speed reduction executor of low noise, including actuating mechanism and drive mechanism, drive mechanism includes the mount, the mount internal rotation is equipped with input shaft and output shaft, through one-level transmission gear subassembly, the transmission of second grade drive gear subassembly in proper order between input shaft and the output shaft, one-level drive gear subassembly is including first planet carrier, first planet carrier is fixed and is equipped with the jackshaft, the jackshaft both ends are equipped with first projection and second projection, the input shaft has seted up first spacing hole, first projection embedding first spacing hole and rather than the normal running fit, the output shaft has seted up second spacing hole, second projection embedding second spacing hole and rather than normal running fit; oil film layers are arranged between the first convex column and the first limiting hole and between the second convex column and the second limiting hole; end face gaps are reserved between the end face of the first convex column and the first limiting hole and between the end face of the second convex column and the second limiting hole. Has the effects of low noise, high coaxiality, stable operation and high transmission efficiency.

Description

Low-noise multi-head worm and multi-stage gear reduction actuator

Technical Field

The utility model relates to a gear motor technical field, in particular to bull worm and multistage gear speed reduction executor of low noise.

Background

The speed reducing motor adopts involute planetary gear transmission, and reasonably utilizes internal and external engagement and power division, so that the speed reducing motor has the characteristics of simple structure, light weight, small volume, wide rotating speed range, high efficiency, stable operation, large bearing capacity, strong adaptability and the like.

The prior chinese patent publication No. CN 106787426A discloses an electric tail gate speed reducing motor for an automobile, which comprises a motor and a speed reducer, wherein a speed reducing mechanism is arranged in the speed reducer, and the speed reducing mechanism comprises a primary speed reducing mechanism in transmission connection with an output end of the motor and a secondary speed reducing mechanism in transmission connection with the primary speed reducing mechanism; the input shaft of the first-stage speed reducing mechanism is coaxial with the output shaft of the motor, and the output shaft of the first-stage speed reducing mechanism is vertical to the axis of the input shaft of the first-stage speed reducing mechanism; the input shaft of the second-stage speed reducing mechanism and the output shaft of the first-stage speed reducing mechanism are coaxial.

However, the speed reducing motor has the following disadvantages: the first support shaft of the speed reducing motor is inserted into the connecting disc of the output shaft of the speed reducer, and a buffering and damping structure is not additionally arranged, so that gears at all levels generate axial movement when rotating to cause large noise, and the friction between the gears leads to short service life of the gears.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bull worm and multistage gear speed reduction executor of low noise has that the noise is little, operate steadily, transmission efficiency is high, improve life's effect.

The above technical purpose of the present invention can be achieved by the following technical solutions: a low-noise multi-head worm and multi-stage gear speed reduction actuator comprises a driving mechanism and a transmission mechanism, wherein the transmission mechanism comprises a fixed frame, an input shaft and an output shaft are arranged in the fixed frame in a rotating mode, the input shaft and the output shaft are sequentially transmitted through a first-stage transmission gear assembly and a second-stage transmission gear assembly, the first-stage transmission gear assembly comprises a first planet carrier, an intermediate shaft is fixedly arranged on the first planet carrier, a first convex column and a second convex column are respectively arranged at two ends of the intermediate shaft, a first limiting hole is formed in the end face of the input shaft corresponding to the first convex column, the first convex column is embedded into the first limiting hole and is in rotating fit with the first convex column, a second limiting hole is formed in the end face of the output shaft corresponding to the second convex column, and the second convex column is embedded into the second limiting hole and is in rotating fit with the second limiting hole; oil film layers are arranged between the first convex column and the first limiting hole and between the second convex column and the second limiting hole; end face gaps are reserved between the end face of the first convex column and the first limiting hole and between the end face of the second convex column and the second limiting hole.

By adopting the technical scheme, when in assembly, oil films with lubricating and cooling functions are coated on the inner walls of the first limiting hole of the input shaft and the second limiting hole of the output shaft, or the oil films are coated on the outer walls of the first convex column and the second convex column, then the first convex column and the second convex column at the two ends of the intermediate shaft are respectively correspondingly matched with the first limiting hole of the input shaft and the second limiting hole of the output shaft in an embedding way, so that an oil film layer is formed between the outer wall of the first convex column and the inner wall of the first limiting hole and between the outer wall of the second convex column and the inner wall of the second limiting hole, as end surface gaps which can be floated are reserved between the end surface of the first convex column and the first limiting hole and between the end surface of the second convex column and the second limiting hole, air in the end surface gaps is sealed through the oil film layer, the compressed air enables relative supporting force to be kept in suspension between the two ends of the central shaft and the input shaft and the output shaft, the mutual friction force between the two ends of the convex column and the inner walls of the limiting holes are greatly reduced, the stable transmission is realized, the stable transmission is low in noise, the stable operation efficiency is high, and the service life is prolonged.

The utility model discloses a further set up to: the output shaft with be equipped with the duplex bearing structure between the mount, the duplex bearing structure is including locating two bearings side by side of output shaft lateral wall, the inner circle of bearing with output shaft fixed connection, the outer lane of bearing with mount fixed connection.

Through adopting above-mentioned technical scheme, duplex bearing structure can greatly improve output shaft pivoted stability, prevents effectively that the output shaft from taking place the drunkenness and producing the abnormal sound.

The utility model discloses a further set up to: the output shaft is close to jackshaft one end integrated into one piece is equipped with the second planet carrier, the second planet carrier is kept away from the one end extension of jackshaft is equipped with the second step, the second step with the spacing cooperation of keeping out of duplex bearing structure.

Through adopting above-mentioned technical scheme, the establishment of second step has reduced the area of contact between double bearing structure and the second planet carrier, has reduced the frictional resistance between double bearing structure and the second planet carrier, makes double bearing structure rotate more steadily.

The utility model discloses a further set up to: the distance of the end face gap is set between 0.2 mm and 0.3 mm.

The utility model discloses a further set up to: the first-stage transmission gear assembly comprises a plurality of first planet gears arranged on the first planet carrier and a first sun gear connected to the end part of the input shaft, a first gear ring is arranged on the inner wall of the fixing frame corresponding to the first planet gears in the circumferential direction, and the first planet gears are matched with the first gear ring gear, so that the first sun gear is in transmission fit with the first planet gears and drives the first planet carrier to rotate.

Through adopting above-mentioned technical scheme, first ring gear is fixed to be located the mount inner wall, and first sun gear rotates through the rotation of input shaft to drive a plurality of first planetary gears and rotate in first ring gear and realize slowing down.

The utility model discloses a further set up to: the secondary transmission gear assembly comprises a second sun gear arranged in the middle of the intermediate shaft and a plurality of second planetary gears rotatably connected and arranged on the end face of the output shaft, a second gear ring is arranged on the inner wall of the fixing frame corresponding to the circumferential direction of the second planetary gears, and the second planetary gears are matched with the second gear ring in a gear manner, so that the second sun gear is in transmission fit with the second planetary gears and drives the output shaft to rotate.

Through adopting above-mentioned technical scheme, the mount inner wall is located to the second ring gear is fixed, and second sun gear rotates through the rotation of jackshaft to drive a plurality of second planetary gear and rotate in the second ring gear and realize slowing down, make the operation more steady.

The utility model discloses a further set up to: and a first step is arranged between the second convex column and the second sun gear, and the first step is in limit, abutting and matching with the end face of the output shaft.

Through adopting above-mentioned technical scheme, the establishment of first step can prevent effectively that direct contact between output shaft terminal surface and the second sun gear from leading to the condition of second sun gear terminal surface wearing and tearing to appear.

The utility model discloses a further set up to: the driving mechanism comprises a motor, a worm is arranged on an output shaft of the motor, a worm wheel is coaxially arranged on an input shaft, and the worm is in transmission fit with the worm wheel.

Through adopting above-mentioned technical scheme, the worm passes through the motor and rotates to carry out the transmission to the worm wheel, make the input shaft can carry out the rotation of slowing down.

The utility model discloses a further set up to: the worm is a multi-start worm.

By adopting the technical scheme, the multi-head worm is different from the warhead worm, so that the transmission ratio and the transmission efficiency can be improved, the response speed is higher, and stable transmission is realized.

To sum up, the utility model discloses following beneficial effect has: the mode of additionally installing the intermediate shaft between the input shaft and the output shaft and carrying out oil sealing is adopted, and the novel oil seal device has the effects of low noise, high coaxiality, stable operation, high transmission efficiency and prolonged service life.

Drawings

Fig. 1 is a structural view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a plan view of the present invention.

Fig. 4 isbase:Sub>A cross-sectional view of the cross-sectionbase:Sub>A-base:Sub>A of fig. 3 according to the present invention.

Fig. 5 is a partially enlarged view of the area B in fig. 4 according to the present invention.

In the figure: 1. a fixed mount; 11. a first ring gear; 12. a second ring gear; 2. an input shaft; 21. a first limit hole; 22. a first sun gear; 3. a first carrier; 31. a first planetary gear; 4. an intermediate shaft; 41. a first convex column; 42. a second convex column; 43. a second sun gear; 44. a first step; 5. an output shaft; 50. a second planet carrier; 51. a second limiting hole; 52. a second planetary gear; 6. an end face gap; 71. a motor; 72. a worm; 8. a worm gear; 9. a double bearing structure; 90. a bearing; 91. a second step; 10. an oil film layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a bull worm and multistage gear speed reduction executor of low noise, includes actuating mechanism and drive mechanism, as shown in fig. 1-2, drive mechanism includes mount 1, and the coaxial input shaft 2 that is equipped with in the mount 1, first planet frame 3, wear to establish fixed jackshaft 4, output shaft 5 along the 3 axial of first planet frame, and coaxial setting can guarantee the utility model discloses a axiality is high, stability and transmission efficiency when improving the transmission, and actuating mechanism is including motor 71, and motor 71's output shaft 5 is equipped with worm 72, and the coaxial worm wheel 8 that is equipped with on the input shaft 2, worm 72 and the transmission cooperation of worm wheel 8, worm 72 rotate through motor 71's drive power to carry out the transmission to worm wheel 8, make input shaft 2 can carry out the rotation that slows down, realize the one-level speed reduction, in order to improve drive ratio and transmission efficiency, make response speed faster, the worm 72 establishes to be the bull worm.

As shown in fig. 2-4, the input shaft 2 and the first planet carrier 3 are driven by a primary transmission gear assembly, the primary transmission gear assembly includes a plurality of first planet gears 31 disposed on the first planet carrier 3, and a first sun gear 22 connected to an end of the input shaft 2, a first ring gear 11 is disposed on an inner wall of the fixed frame 1 corresponding to the circumference of the first planet gears 31, the first planet gears 31 are in gear fit with the first ring gear 11, so that the first sun gear 22 is in transmission fit with the first planet gears 31 and drives the first planet carrier 3 to rotate, the first sun gear 22 rotates by the rotation of the input shaft 2, and the plurality of first planet gears 31 are driven to rotate in the first ring gear 11 to realize speed reduction, thus realizing secondary speed reduction; in order to reduce the probability of the first sun gear being deformed, the number of the first planetary gears 31 is three, and the first planetary gears 31 are connected to the first carrier 3 along the intermediate shaft 4 at equal intervals, and the three first planetary gears 31 are uniformly distributed, so that the stress generated when the first sun gear rotates can be uniformly dispersed.

As shown in fig. 2-4, the intermediate shaft 4 and the output shaft 5 are driven by a secondary transmission gear assembly, the secondary transmission gear assembly includes a second sun gear 43 disposed in the middle of the intermediate shaft 4 and a plurality of second planet gears 52 rotatably connected to the end surface of the output shaft 5, a second ring gear 12 is circumferentially disposed on the inner wall of the fixed frame 1 corresponding to the second planet gears 52, and the second planet gears 52 are in gear fit with the second ring gear 12, so that the second sun gear 43 is in transmission fit with the second planet gears 52 and drives the output shaft 5 to rotate, thereby realizing three-stage speed reduction; also, in order to reduce the probability of the second sun gear being deformed, the number of the second planetary gears 52 is set to three, and the second planetary gears 52 are connected to the end surface of the output shaft 5 to rotate at equal intervals along the intermediate shaft 4, and the stress generated when the second sun gear rotates can be uniformly dispersed by the three uniformly distributed second planetary gears 52.

As shown in fig. 4-5, a dual-bearing structure 9 is disposed between the output shaft 5 and the fixing frame 1, the dual-bearing structure 9 includes two bearings 90 disposed on the side wall of the output shaft 5, the inner ring of the bearing 90 is fixedly connected to the output shaft 5, the outer ring of the bearing 90 is fixedly connected to the fixing frame 1, and the dual-bearing structure 9 can greatly improve the stability of the rotation of the output shaft 5 and effectively prevent the output shaft 5 from moving and generating abnormal sound.

As shown in fig. 4-5, two ends of the intermediate shaft 4 are respectively provided with a first protruding column 41 and a second protruding column 42, the end surface of the input shaft 2 is provided with a first limiting hole 21 corresponding to the first protruding column 41, the first protruding column 41 is embedded into the first limiting hole 21 and rotationally matched therewith, the end surface of the output shaft 5 is provided with a second limiting hole 51 corresponding to the second protruding column 42, and the second protruding column 42 is embedded into the second limiting hole 51 and rotationally matched therewith; between first projection 41 and first spacing hole 21, all scribble between second projection 42 and the spacing hole 51 of second and be equipped with the lubricating grease that has the lubricated cooling effect as oil film layer 10, when the utility model discloses the operation, this oil film layer 10 can be through the rotatory sealed oil film that forms of jackshaft 4, in addition in first projection 41 terminal surface and first spacing hole 21 bottom, all leave terminal surface clearance 6 between second projection 42 terminal surface and the spacing hole 51 bottom of second, the air in terminal surface clearance 6 has sealed through oil film layer 10, compressed air makes center pin both ends and input shaft 2, can keep suspending when having relative holding power between the output shaft 5, has greatly reduced frictional force each other, realizes the steady transmission in the working process.

As shown in fig. 5, a first step 44 is arranged between the second convex pillar 42 and the second sun gear 43, the first step 44 is in limit, abutting and matching with the end surface of the output shaft 5, and the arrangement of the first step 44 can effectively prevent the end surface of the output shaft 5 from directly contacting with the second sun gear 43, which results in the occurrence of the condition of abrasion of the end surface of the second sun gear 43; output shaft 5 is close to jackshaft 4 one end integrated into one piece and is equipped with second planet carrier 50, the one end extension that jackshaft 4 was kept away from to second planet carrier 50 is equipped with second step 91, second step 91 and the spacing cooperation of keeping out of duplex bearing structure 9, the establishment of second step 91 has reduced the area of contact between duplex bearing structure 9 and the second planet carrier 50, the frictional resistance between duplex bearing structure 9 and the second planet carrier 50 has been reduced, it is more steady to make duplex bearing structure 9 rotate.

The utility model discloses a basic operating principle does: during assembly, firstly coating oil films with lubricating and cooling functions on the inner walls of the first limiting hole 21 of the input shaft 2 and the second limiting hole 51 of the output shaft 5, or coating oil films on the outer walls of the first convex column 41 and the second convex column 42, then respectively embedding and matching the first convex column 41 and the second convex column 42 at two ends of the intermediate shaft 4 with the first limiting hole 21 of the input shaft 2 and the second limiting hole 51 of the output shaft 5 correspondingly, so that an oil film layer 10 is formed between the outer wall of the first convex column 41 and the inner wall of the first limiting hole 21 and between the outer wall of the second convex column 42 and the inner wall of the second limiting hole 51, the worm 72 is driven to rotate by the driving structure, the worm 72 continuously drives the worm wheel 8 at one end of the input shaft 2 to rotate in a speed reduction manner, simultaneously drives the first sun gear 22 at the other end of the input shaft 2 to rotate, and then the first sun gear 22 drives the first planet carrier 3 to rotate in a speed reduction manner through the transmission of the first planet gear 31, the first planet carrier 3 continues to drive the second planet gear 52 to rotate in a speed reducing way through the second sun gear 43 on the first planet carrier, and finally the second planet gear 52 drives the output shaft 5 to rotate through the second planet carrier 50 which is integrated with the end surface of the output shaft 5, so the three-stage speed reducing transmission of the utility model is realized, in addition, because the end surface clearance 6 is left between the first convex column 41 and the first spacing hole 21 and between the second convex column 42 and the second spacing hole 51, the distance of the end surface clearance 6 is set between 0.2 mm and 0.3mm, the air in the end surface clearance 6 is sealed through the oil film layer 10, the compressed air enables the two ends of the central shaft and the input shaft 2 and the output shaft 5 to keep suspending while having relative supporting force, thereby greatly reducing the friction force between the two ends of the central shaft and realizing the stable transmission in the working process, and the three-stage speed reducing transmission device has the advantages of low noise, high coaxiality and stable operation, high transmission efficiency and prolonged service life.

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

1. The utility model provides a bull worm and multistage gear speed reduction executor of low noise, includes actuating mechanism and drive mechanism, drive mechanism includes mount (1), mount (1) internal rotation is equipped with input shaft (2) and output shaft (5), input shaft (2) with pass through one-level transmission gear subassembly, secondary drive gear subassembly transmission in proper order between output shaft (5), one-level drive gear subassembly is including first planet carrier (3), first planet carrier (3) are fixed to be equipped with jackshaft (4), its characterized in that:

a first convex column (41) and a second convex column (42) are respectively arranged at two ends of the intermediate shaft (4), a first limiting hole (21) is formed in the end face of the input shaft (2) corresponding to the first convex column (41), the first convex column (41) is embedded into the first limiting hole (21) and is in running fit with the first limiting hole, a second limiting hole (51) is formed in the end face of the output shaft (5) corresponding to the second convex column (42), and the second convex column (42) is embedded into the second limiting hole (51) and is in running fit with the second limiting hole; oil film layers (10) are arranged between the first convex column (41) and the first limiting hole (21) and between the second convex column (42) and the second limiting hole (51); end face gaps (6) are reserved between the end face of the first convex column (41) and the first limiting hole (21) and between the end face of the second convex column (42) and the second limiting hole (51).

2. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 1 wherein: output shaft (5) with be equipped with duplex bearing structure (9) between mount (1), duplex bearing structure (9) are including locating two bearing (90) side by side of output shaft (5) lateral wall, the inner circle of bearing (90) with output shaft (5) fixed connection, the outer lane of bearing (90) with mount (1) fixed connection.

3. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 2 wherein: output shaft (5) are close to jackshaft (4) one end integrated into one piece is equipped with second planet carrier (50), second planet carrier (50) are kept away from the one end extension of jackshaft (4) is equipped with second step (91), second step (91) with the spacing cooperation of keeping out of duplex bearing structure (9).

4. The low noise, multi-headed worm and multi-stage gear reduction actuator of claim 1, wherein: the distance of the end face gap (6) is set between 0.2 mm and 0.3 mm.

5. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 1 wherein: the primary transmission gear assembly comprises a plurality of first planetary gears (31) arranged on the first planet carrier (3) and a first sun gear (22) connected to the end part of the input shaft (2), a first gear ring (11) is arranged on the inner wall of the fixed frame (1) corresponding to the circumferential direction of the first planetary gears (31), and the first planetary gears (31) are meshed with the first gear ring (11) to enable the first sun gear (22) and the first planetary gears (31) to be in transmission fit and drive the first planet carrier (3) to rotate.

6. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 1 wherein: the secondary transmission gear assembly comprises a second sun gear (43) arranged in the middle of the intermediate shaft (4) and a plurality of second planetary gears (52) rotatably connected and arranged on the end face of the output shaft (5), a second gear ring (12) is circumferentially arranged on the inner wall of the fixed frame (1) corresponding to the second planetary gears (52), and the second planetary gears (52) are meshed with the second gear ring (12) to enable the second sun gear (43) and the second planetary gears (52) to be in transmission fit and drive the output shaft (5) to rotate.

7. The low noise, multi-start worm and multi-stage gear reduction actuator of claim 6, wherein: a first step (44) is arranged between the second convex column (42) and the second sun gear (43), and the first step (44) is in limit, abutting and matching with the end face of the output shaft (5).

8. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 1 wherein: the driving mechanism comprises a motor (71), an output shaft of the motor (71) is provided with a worm (72), the input shaft (2) is coaxially provided with a worm wheel (8), and the worm (72) is in transmission fit with the worm wheel (8).

9. A low noise, multi-start worm and multi-stage gear reduction actuator as defined in claim 8 wherein: the worm (72) is a multi-start worm.