CN220087083U

CN220087083U - Rear axle differential speed reducing motor with bridge arm

Info

Publication number: CN220087083U
Application number: CN202223446682.8U
Authority: CN
Inventors: 盛献峰
Original assignee: Zhejiang Norton Motor Co ltd
Current assignee: Zhejiang Norton Motor Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-11-24
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a rear axle differential speed reducing motor with bridge arms, which relates to the technical field of speed reducing motors and comprises a brushless speed reducing motor, a differential driving gear shaft and a rubber coupling, wherein a circular through hole is radially formed in an output shaft of the brushless speed reducing motor and is used for being fixed with a key slot of the rubber coupling through a pin, and key slots which are perpendicular to each other are formed in two end faces of the rubber coupling. The utility model provides a rear axle differential speed reducing motor with bridge arms, which is provided with a brushless speed reducing motor, a box front cover, a box rear cover, a differential driving gear shaft and a rubber coupling, wherein the brushless speed reducing motor is arranged on the upper side of the box rear cover through bolts, and then an output shaft of the brushless speed reducing motor is connected with the left end of the rubber coupling through bolts, so that the rear axle differential speed reducing motor with bridge arms has the advantages of compact structure, space saving compared with the traditional structure, consistent structures at two ends of a long half axle, convenience in installation and effective improvement of the practicability of the device.

Description

Rear axle differential speed reducing motor with bridge arm

Technical Field

The utility model relates to the technical field of gear motors, in particular to a rear axle differential gear motor with bridge arms.

Background

The differential mechanism of the electric wheelchair can realize a mechanism for rotating left and right (or front and back) driving wheels at different rotating speeds. Mainly comprises a left half shaft gear, a right half shaft gear, two planetary gears and a gear rack. The electric wheelchair is used for enabling the left wheel and the right wheel to roll at different rotating speeds when the electric wheelchair turns or runs on uneven road surfaces, namely, the pure rolling motion of the driving wheels at two sides is ensured. The differential is provided for adjusting the rotational speed difference between the left and right wheels. In four-wheel drive, all wheels must be connected in order to drive the four wheels, if the four wheels are mechanically connected together, the electric wheelchair cannot rotate at the same speed during curved running, and in order to enable the curved running rotation speed of the electric wheelchair to be basically consistent, an intermediate differential is needed to adjust the rotation speed difference of the front wheels and the rear wheels. The following problems exist in the prior art:

1. the existing rear axle differential speed reducing motor with bridge arms is in a traditional double-motor structure, and the rotation speed of the left hub and the right hub is respectively controlled by using two motors, so that the two motors occupy larger space and have larger power consumption;

2. the existing rear axle differential gear motor with bridge arms can control the rotation speed of the left and right hubs by only using one motor, so that space and power consumption are saved, but the manufacturing and processing difficulty of the differential housing is high, the differential housing is manufactured by using a five-axis CNC machine tool, the manufacturing difficulty is high, the cost is high, and the assembly is inconvenient.

Disclosure of Invention

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a rear axle differential gear motor with bridge arm, includes brushless gear motor, differential drive tooth axle, rubber shaft coupling, differential gear one, long semi-axis and differential mechanism, brushless gear motor's output shaft radially is provided with circular through-hole, circular through-hole is used for being fixed with the rubber shaft coupling keyway through the pin, the both ends face of rubber shaft coupling is provided with mutually perpendicular's keyway, the other end keyway of rubber shaft coupling passes through cylindrical pin and differential drive tooth axle to be fixed.

The technical scheme of the utility model is further improved as follows: the front end bearing of the differential gear I is connected with a 602 type deep groove ball device, the 602 type deep groove ball device cannot axially float in a circular groove of the front cover of the box body, the rear end bearing of the differential gear I is connected with a 6002 type deep groove ball device, and the 6002 type deep groove ball device cannot float in the rear cover of the box body.

The technical scheme of the utility model is further improved as follows: the front cover of the box body is connected with the rear cover of the box body through bolts, the rear cover of the box body is connected with the brushless gear motor through bolts, the rear cover of the box body is connected with the bridge arm through bolts, and the front end of the bridge arm is provided with a circular mounting flange which is connected with the rear cover of the box body.

The technical scheme of the utility model is further improved as follows: the bridge arm is of a hollow structure, the left end of the bridge arm is of a square flange structure, the right end of the bridge arm is of a round flange structure, the long half shaft penetrates through the hollow part of the bridge arm, the long half shaft penetrates out of the left end cover of the bridge arm, the left end cover of the bridge arm comprises two 6004 type deep groove ball bearings and an oil seal ring, the two 6004 type deep groove ball bearings and the oil seal ring are used for radially fixing the left end of the long half shaft, and the right end of the long half shaft stretches out of the round flange section and is connected with one 6906 type deep groove ball bearing.

The technical scheme of the utility model is further improved as follows: the left side surface of long semi-axis has square keyway and jump ring mounting groove, the right side of long semi-axis is circular through-hole in 6906 type deep groove ball bearing's right side, long semi-axis passes through the pin and is connected with bevel gear one, bevel gear one is arranged in differential case back lid, differential gear one case back lid and differential gear one protecgulum be the same structure and can replace each other, bevel gear two has been installed in the same differential gear one case protecgulum.

The technical scheme of the utility model is further improved as follows: the middle of the front cover of the first differential gear shell and the middle of the rear cover of the first differential gear shell are provided with first differential gears, the first differential gears are driven to rotate through differential driving gear shafts, a bevel gear pin is arranged in the middle of the first differential gears, a third bevel gear is arranged in the middle of the bevel gear pin in a relative mode, and the middle of the bevel gears are protected in a spaced mode through a rubber spacer arranged on the bevel gear pin.

The technical scheme of the utility model is further improved as follows: the differential mechanism comprises a bevel gear pin, a first bevel gear, a second bevel gear, a third bevel gear and a first differential gear, wherein a front cover of a shell of the first differential gear is arranged in the front cover of the box body, the second bevel gear is connected with a short half shaft through a round pin, a square groove is formed in the middle of the front cover of the box body, the square groove is consistent with a square flange structure in a bridge arm structure, two identical 6004 type deep groove ball bearings and an oil seal ring are arranged between the square groove and the bridge arm, the right end of the short half shaft is arranged in the deep groove ball to prevent movement, and a key groove and a clamp spring are arranged on the right end surface of the short half shaft

The technical scheme of the utility model is further improved as follows: the left end of the long half shaft and the right end surface key groove and the snap spring of the short half shaft are connected with the left and right hubs through pins, and the snap spring is fixedly connected with the left and right U-shaped inserting frames of the electric wheelchair.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:

1. the utility model provides a rear axle differential speed reducing motor with bridge arms, which is provided with a brushless speed reducing motor, a box front cover, a box rear cover, a differential driving gear shaft and a rubber coupling, wherein the brushless speed reducing motor is arranged on the upper side of the box rear cover through bolts, then an output shaft of the brushless speed reducing motor is connected with the left end of the rubber coupling through bolts, then the output shaft of the brushless speed reducing motor is connected with the differential driving gear shaft through the right end of the rubber coupling, then the two ends of the differential driving gear shaft are respectively connected with deep groove ball bearings in the box front cover, the box rear cover is also connected with a right end circular flange bolt of the bridge arms, so that the brushless speed reducing motor is fixed on the bridge arms, the first bevel gear is connected with the second bevel gear through the pin and is connected with the short half shaft through the pin, and the front cover of the box body and the rear cover of the box body of the whole differential structure device are arranged in the box body, so that the structure is compact, the space is saved compared with the traditional structure, the structures at the two ends of the long half shaft are consistent, the installation is convenient, and the practicability of the device is effectively improved.

2. The utility model provides a rear axle differential speed reducing motor with a bridge arm, which comprises a clamp spring, a rubber pad sleeve, a bridge arm, a flat key, an oil seal ring, a 6004 type deep groove ball bearing and a bridge arm left end cover through a bridge arm, then the bridge arm is connected with the bridge arm left end cover, a long half shaft is inserted into the bridge arm and fixed with the 6004 type deep groove ball bearing in a box body formed by the bridge arm and the end cover, a short half shaft is inserted into a box body front cover and fixed with the 6004 type deep groove ball bearing, the bridge arm structure is connected with a flange at the lower side of the box body rear cover, so that a differential structure and a driving structure are mutually fixed, a differential function is realized, wherein the bridge arm left end cover and the box body front cover are sleeved with the rubber pad sleeve to serve as a protection function, the clamp spring is fixed with a U-shaped plug frame of a wheelchair, the long half shaft and the short half shaft are connected with a hub through the flat key to realize differential control on the rotating speed of the hub, so that the front and rear cover of the box body of the differential speed reducing motor is consistent in structure, the differential speed is replaced, the structure is simple and convenient to process, the differential structure is connected with the front and the differential speed is connected with the pin of the box body through the flat key, and the differential speed effect is good.

Drawings

FIG. 1 is a schematic diagram of a rear axle differential speed reduction motor with bridge arms according to the present utility model;

FIG. 2 is a schematic diagram of the connection of the left end cap of the bridge arm of the structure of the present utility model;

FIG. 3 is an enlarged schematic view of a portion of FIG. 2 showing the structure of the present utility model;

FIG. 4 is a schematic view of the differential gear connection of the present utility model.

In the figure: 1. a brushless speed reduction motor; 2. a box front cover; 3. clamping springs; 4. a rubber pad sleeve; 5. a rear cover of the case; 6. bridge arms; 7. a flat key; 8. a long half shaft; 9. differential drive tooth shaft; 10. a differential case front cover; 11. an oil seal ring; 12. a short half shaft; 13. 6004 type deep groove ball bearings; 14. 6906 type deep groove ball bearing; 15. a differential gear I; 16. a left end cover of the bridge arm; 17. a clamp spring groove; 18. a first bevel gear; 19. a bevel pin; 20. a second bevel gear; 21. a third bevel gear; 26. rubber couplings.

Detailed Description

The utility model is further illustrated by the following examples:

example 1

As shown in fig. 1-4, the utility model provides a rear axle differential speed reducing motor with bridge arms, which comprises a brushless speed reducing motor 1, a differential driving gear shaft 9, a rubber coupling 26, a first differential gear 15, a long half shaft 8 and a differential, wherein the output shaft of the brushless speed reducing motor 1 is radially provided with a circular through hole, the circular through hole is used for being fixed with a key slot of the rubber coupling 26 through a pin, two end surfaces of the rubber coupling 26 are provided with key slots which are mutually perpendicular, and the key slot at the other end of the rubber coupling 26 is fixed with the differential driving gear shaft 9 through a cylindrical pin.

In this embodiment, through having set up brushless gear motor 1, box protecgulum 2, box protecgulum 5, differential drive tooth axle 9, under the effect of rubber coupling 26, wherein brushless gear motor 1 passes through the bolt to be installed in the upside of box protecgulum 5, then the output shaft of brushless gear motor 1 passes through the bolt with the left end of rubber coupling 26 and connects, then right-hand member through rubber coupling 26 is connected with differential drive tooth axle 9, the both ends of rethread differential drive tooth axle 9 respectively with deep groove ball bearing connecting device in box protecgulum 2, wherein box protecgulum 5 still with the right-hand member circular flange bolted connection of bridge arm 6, make brushless gear motor 1 fix on bridge arm 6, afterwards through differential structure including differential gear one 15, bevel gear one 18, bevel gear pin 19, bevel gear two 20, bevel gear three 21, rubber coupling 26, wherein differential gear one 15 meshes with differential drive tooth axle 9, rotary transmission, bevel gear 19 inserts bevel gear three 21 and intermediate hole site, bevel gear one is installed and is arranged in differential drive tooth axle 9 intermediate, bevel gear one 8 has been installed through the differential gear one end of half axle 8 with the right-hand member circular flange bolted connection of bridge arm 6, bevel gear one-tooth 18 has been realized through the long-pending device of differential axle 2, thereby the differential axle 2 has been realized to the compact structure, and the differential axle half axle 2 has been realized, and the structure has been compact, and has been realized, and has been compact structure.

Example 2

As shown in fig. 1-4, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the front end bearing of the differential gear one 15 is connected with a 602 type deep groove ball device, the 602 type deep groove ball device cannot axially float in a circular groove of the box body front cover 2, the rear end bearing of the differential gear one 15 is connected with a 6002 type deep groove ball device, and the 6002 type deep groove ball device cannot float in the box body rear cover 5.

In this embodiment, the bridge arm structure includes the jump ring 3, the rubber pad cover 4, the bridge arm 6, the flat key 7, the oil seal ring 11, 6004 type deep groove ball bearing 13, the bridge arm left end cover 16, then be connected with the bridge arm left end cover 16 through the bridge arm 6, long half shaft 8 inserts in the bridge arm 6, fix with 6004 type deep groove ball bearing 13 in the box that the bridge arm 6 and end cover constitute, short half shaft 12 inserts in the box protecgulum 2 and fixes with 6004 type deep groove ball bearing 13, bridge arm structure and box protecgulum 5 downside flange connection, make differential structure and drive structure mutually fixed, realize differential function, wherein have jump ring and the U type cartridge of wheelchair to fix on long half shaft 8 and short half shaft 12, differential gear motor for the wheelchair is fixed in the wheelchair promptly, long half shaft 8 and short half shaft 12 realize the differential control to wheel hub rotational speed through flat key and hub connection, thereby realized that the differential gear casing front and back lid structure that uses is unanimous, interchangeable structure is simple and convenient for processing, and bevel gear is connected with good differential effect, differential device has improved differential effect.

The working principle of the rear axle differential speed reducing motor with the bridge arm is specifically described below.

As shown in fig. 1-4, when in use, under the action of the brushless speed reduction motor 1, the front cover 2 of the box body, the rear cover 5 of the box body, the differential driving gear shaft 9 and the rubber coupling 26, wherein the brushless speed reduction motor 1 is arranged on the upper side of the rear cover 5 of the box body through bolts, then the output shaft of the brushless speed reduction motor 1 is connected with the left end of the rubber coupling 26 through bolts, then the right end of the rubber coupling 26 is connected with the differential driving gear shaft 9, then the two ends of the differential driving gear shaft 9 are respectively connected with deep groove ball bearings in the front cover 2 of the box body, wherein the rear cover 5 of the box body is also connected with the right end circular flange bolts of the bridge arm 6, so that the brushless speed reduction motor 1 is fixed on the bridge arm 6, the differential structure comprises a first differential gear 15, a first bevel gear 18, a bevel gear pin 19, a second bevel gear 20, a third bevel gear 21 and a rubber coupling 26, wherein the first differential gear 15 is meshed with a differential driving gear shaft 9 and is in rotary transmission, the bevel gear pin 19 is inserted into the third bevel gear 21 and a middle hole site and is arranged in the middle of the differential driving gear shaft 9, the first bevel gear 18 is connected with the second bevel gear 20 through the pin and a long half shaft 8 and is connected with the short half shaft 12 through the pin, and the whole differential structure device is arranged in a box body formed by a box body front cover 2 and a box body rear cover 5, so that the structure is compact, the space is saved compared with the traditional structure, the structures of the two ends of the long half shaft and the short half shaft are consistent, the installation is convenient, and the practicability of the device is effectively improved.

When the differential gear is used, the bridge arm structure comprises the clamp spring 3, the rubber pad sleeve 4, the bridge arm 6, the flat key 7, the oil seal rings 11 and 6004 type deep groove ball bearings 13 and the bridge arm left end cover 16, then the bridge arm 6 is connected with the bridge arm left end cover 16, the long half shaft 8 is inserted into the bridge arm 6 and fixed with the 6004 type deep groove ball bearings 13 in the box body formed by the bridge arm 6 and the end cover, the short half shaft 12 is inserted into the box body front cover 2 and fixed with the 6004 type deep groove ball bearings 13, the bridge arm structure is connected with the lower side flange of the box body rear cover 5, the differential structure and the driving structure are mutually fixed, the differential function is realized, the clamp spring is sleeved on the bridge arm left end cover and the box body front cover for protecting, the clamp spring is fixed with the U-shaped inserting frame of the wheelchair, the differential gear motor for the wheelchair is fixed on the wheelchair, and the long half shaft 8 and the short half shaft 12 are connected with the hub through the flat key, so that differential control of the rotating speed of the hub is realized, the front and rear cover structure of the used differential gear shell is consistent, the differential gear is simple and convenient to process the bevel gear, the bevel gear is connected with the bevel gear, the differential gear is well, and the differential effect is improved.

The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims

1. The utility model provides a rear axle differential gear motor with bridge arm, includes brushless gear motor (1), differential drive tooth axle (9), rubber coupling (26), differential gear one (15), long semi-axis (8) and differential mechanism, its characterized in that: the output shaft of the brushless gear motor (1) is radially provided with a circular through hole, the circular through hole is used for being fixed with a key groove of the rubber coupling (26) through a pin, two end faces of the rubber coupling (26) are provided with key grooves which are perpendicular to each other, and the key groove at the other end of the rubber coupling (26) is fixed with the differential driving gear shaft (9) through a cylindrical pin.

2. The rear axle differential gear motor with bridge arms according to claim 1, wherein: the front end bearing of the differential gear I (15) is connected with a 602 type deep groove ball device, the 602 type deep groove ball device enables the device to not axially float in a circular groove of the box body front cover (2), the rear end bearing of the differential gear I (15) is connected with a 6002 type deep groove ball device, and the 6002 type deep groove ball device enables the device to not float in the box body rear cover (5).

3. The rear axle differential gear motor with bridge arms according to claim 2, wherein: the novel brushless speed reduction motor is characterized in that the box front cover (2) is connected with the box rear cover (5) through bolts, the box rear cover (5) is connected with the brushless speed reduction motor (1) through bolts, the box rear cover (5) is connected with the bridge arm (6) through bolts, and a round mounting flange is arranged at the front end of the bridge arm (6) and is connected with the box rear cover (5).

4. The rear axle differential gear motor with bridge arms according to claim 1, wherein: the bridge arm (6) is of a hollow structure, the left end of the bridge arm (6) is of a square flange structure, the right end of the bridge arm (6) is of a round flange structure, the long half shaft (8) penetrates through the hollow part of the bridge arm (6), the long half shaft (8) penetrates out of the left end cover of the bridge arm (6), the left end cover of the bridge arm (6) comprises two 6004 type deep groove ball bearings (13) and an oil seal ring (11), the two 6004 type deep groove ball bearings (13) and the oil seal ring (11) are used for radially fixing the left end of the long half shaft (8), and the right end of the long half shaft (8) stretches out of the round flange section and then is connected with one 6906 type deep groove ball bearing (14).

5. The rear axle differential gear motor with bridge arms according to claim 1, wherein: the left side surface of long semi-axis (8) has square keyway and jump ring (3) mounting groove, the right side of long semi-axis (8) is the right side of circular through-hole in 6906 type deep groove ball bearing (14), long semi-axis (8) are connected with bevel gear one (18) through the pin, in differential case back lid is arranged in to bevel gear one (18), differential case back lid and differential case one (15) protecgulum are the same structure and can replace each other, bevel gear two (20) have been installed in the differential case one (15) protecgulum of the same.

6. The rear axle differential gear motor with bridge arms according to claim 2, wherein: the novel differential gear is characterized in that a first differential gear (15) is arranged between a front cover of a first differential gear (15) shell and a rear cover of the first differential gear (15) shell, the first differential gear (15) is driven to rotate through a differential driving gear shaft (9), a bevel gear pin (19) is arranged in the middle of the first differential gear (15), a bevel gear three (21) is oppositely arranged in the middle of the bevel gear pin (19), and the middle of the bevel gear is protected by a rubber spacer arranged on the bevel gear pin (19).

7. The rear axle differential gear motor with bridge arms according to claim 2, wherein: the differential mechanism comprises a bevel gear pin (19), a bevel gear I (18), a bevel gear II (20), a bevel gear III (21) and a differential gear I (15), wherein a casing front cover of the differential gear I (15) is arranged in a casing front cover (2), the bevel gear II (20) is connected with a short half shaft (12) through a round pin, a square groove is formed in the middle of the casing front cover (2), the square groove is consistent with a square flange in a bridge arm (6) structure, two identical 6004 type deep groove ball bearings (13) and an oil seal ring (11) are arranged between the square groove and the bridge arm (6), the right end of the short half shaft (12) is arranged in a deep groove ball to prevent play, and a key groove and a clamp spring (3) are formed in the right end surface of the short half shaft (12)。

8. The rear axle differential gear motor with bridge arms according to claim 2, wherein: the left end of the long half shaft (8) and the right end surface key groove of the short half shaft (12) are connected with the left and right hubs through pins, and the clamp spring (3) is fixedly connected with the left and right U-shaped inserting frames of the electric wheelchair.