Drive axle assembly device and toy remote control model car

Abstract

The utility model discloses a drive axle assembly device and a toy remote control model car, the drive axle assembly device comprises a shell, a main drive assembly, a locking device and a differential mechanism located in the shell, the differential mechanism comprises a synchronous gear, a planetary gear set, a first transmission mechanism and a second transmission mechanism, the synchronous gear sleeves the first transmission mechanism and is connected with the planetary gear set; two ends of the planetary gear set are respectively meshed with the first transmission mechanism and the second transmission mechanism; the main driving assembly penetrates through the shell and is meshed with the synchronous gear. The locking device comprises a differential lock shifting block, a shifting fork, a pushing spring, a connecting assembly and a driving motor, the differential lock shifting block, the shifting fork and the pushing spring are located in the shell, the differential lock shifting block slides on the first transmission mechanism and rotates along with the first transmission mechanism, and the shifting fork is rotationally installed on the shell and connected with the differential lock shifting block; the other end of the connecting assembly penetrates through the pushing spring and the shell and then is connected with the driving motor, and the two ends of the pushing spring are connected with the inner wall of the shell and the shifting fork respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of toy car structures, in particular to a drive axle assembly device and a toy remote control model car. Background Art

[0002] After the power of the reduction gearbox of the vehicle is transmitted through components such as the transmission and the transmission shaft, it is finally transmitted to the drive axle and then distributed to the left and right half shafts to drive the wheels to rotate. The drive axle is the last assembly, and its main components are the reducer and the differential. The differential usually consists of parts such as planetary gears, planetary gear carriers, and half shaft gears. The power of the reduction gearbox enters the differential through the transmission shaft, directly drives the planetary gear carrier, and then the planetary gears drive the left and right half shafts to drive the left and right wheels respectively.

[0003] When the toy car goes straight, the rotational speeds of the left and right wheels and the planetary gear carrier are equal and in a balanced state. When the toy car turns, this balanced state is disrupted, resulting in a decrease in the rotational speed of the inner wheel and an increase in the rotational speed of the outer wheel. The function of the differential is to allow the two half shafts to rotate at different speeds while transmitting power to the two half shafts, so as to satisfy the unequal-distance driving of the two wheels as purely rolling as possible and reduce the friction between the tires and the ground.

[0004] However, when a toy car equipped with a drive axle encounters a harsh road surface, such as sand or mud, as long as one wheel gets stuck and slips, at this time, the differential in the drive axle will distribute most of the power to the slipping wheel, and the other wheel will lose power and almost stop in place, resulting in the toy car being unable to drive normally. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a drive axle assembly device and a toy remote control model car to solve the technical problem that when a toy car equipped with a drive axle encounters a harsh road surface, such as sand or mud, as long as one wheel gets stuck and slips, at this time, the differential in the drive axle will distribute most of the power to the slipping wheel, and the other wheel will lose power and almost stop in place, resulting in the toy car being unable to drive normally.

[0006] The utility model provides a drive axle assembly device, including:

[0007] A housing;

[0008] A differential, located inside the housing. The differential includes a synchronizing gear, a planetary gear set, a first transmission mechanism, and a second transmission mechanism. The synchronizing gear is sleeved on the first transmission mechanism and connected to the planetary gear set. One end of the planetary gear set meshes with the first transmission mechanism, and the other end meshes with the second transmission mechanism;

[0009] The main drive assembly, which passes through the housing and meshes with the synchronizing gear;

[0010] The locking device includes a differential lock shifting block, a fork, a pushing spring, a connecting assembly and a driving motor. The differential lock shifting block, the fork and the pushing spring are all located inside the housing. The differential lock shifting block is sleeved on the first transmission mechanism and can move along the axial direction of the first transmission mechanism. The differential lock shifting block rotates synchronously with the first transmission mechanism. The fork is rotatably installed on the housing and is movably connected to the differential lock shifting block. One end of the connecting assembly is located inside the housing and is connected to the fork, and the other end passes through the pushing spring and the housing and is connected to the driving motor. The two ends of the pushing spring are respectively connected to the inner wall of the housing and the fork. The driving motor can drive the differential lock shifting block to engage with or disengage from the synchronizing gear under the action of the pushing spring.

[0011] Further, the fork includes an arc-shaped fork, a support arm, two positioning posts and two rotating rods. The arc-shaped fork is an arc-shaped rod body. The two positioning posts are respectively convexly provided at both ends of the inner wall of the arc-shaped fork. The two rotating rods are both convexly provided on the outer wall of the arc-shaped fork. The support arm is convexly provided on the side wall of the arc-shaped fork. The arc-shaped fork is rotatably installed on the inner wall of the housing through the two rotating rods. The differential lock shifting block is provided with an annular groove, and the two positioning posts are both inserted into the annular groove. The connecting assembly is connected to the support arm, and the pushing spring abuts against the support arm.

[0012] Further, the connecting assembly includes a steel wire rope and a connecting block. The support arm is provided with a pin hole penetrating through it. The housing is provided with a receiving space and a wire hole communicating with the receiving space. The differential, the differential lock shifting block, the fork, the pushing spring and the connecting block are all located in the receiving space. One end of the steel wire rope is connected to the connecting block, and the other end passes through the pin hole, the pushing spring and the wire hole in sequence and is connected to the driving motor.

[0013] Further, the first transmission mechanism includes a first internal gear, a first shaft rod and a first external gear. The two ends of the first shaft rod are respectively fixedly connected to the first internal gear and the first external gear. The first internal gear meshes with the planetary gear set. The differential lock shifting block is slidably installed on the first shaft rod and rotates synchronously with the first shaft rod. The synchronizing gear is installed on the first shaft rod and idles relative to the first shaft rod. When the differential lock shifting block engages with the synchronizing gear, the synchronizing gear and the differential lock shifting block rotate synchronously with the first shaft rod.

[0014] Further, the differential lock shift block includes a sliding disk and a plurality of teeth protruding from one side of the sliding disk. The sliding disk is slidably mounted on the first shaft, the synchronizing gear is provided with a plurality of slots, and each of the teeth can be engaged in each of the slots. The annular groove is provided on the sliding disk.

[0015] Further, the second transmission mechanism includes a second internal gear, a second shaft, and a second external gear. The two ends of the second shaft are respectively fixedly connected to the second internal gear and the second external gear, and the second internal gear meshes with the planetary gear set.

[0016] Further, the planetary gear set includes a sealing cover, a cross, two oppositely arranged first bevel gears, and two oppositely arranged second bevel gears. One end of the sealing cover is rotatably connected to the second shaft, and the other end is fixedly connected to the synchronizing gear and encloses a receiving space with the synchronizing gear. The cross, the first bevel gears, the second bevel gears, the first internal gear, and the second internal gear are all located in the receiving space. The cross is fixedly connected to the inner wall of the receiving space. The two first bevel gears are respectively fixed to the two ends of the cross, and the two second bevel gears are respectively fixed to the other two ends of the cross. One end of the first bevel gear meshes with the first internal gear and the other end meshes with the second internal gear. One end of the second bevel gear meshes with the first internal gear and the other end meshes with the second internal gear.

[0017] Further, the main drive assembly includes a driving gear and a connecting rod for connecting to an external power source. The housing is further provided with a first through hole communicating with the accommodating space. The driving gear is located in the accommodating space and meshes with the synchronizing gear. One end of the connecting rod is located in the accommodating space and fixedly connected to the driving gear, and the other end extends outside the housing after passing through the first through hole.

[0018] Further, the drive axle assembly device further includes a first bridging assembly and a second bridging assembly. The housing is further provided with a second through hole and a third through hole, both of which communicate with the accommodating space. The first bridging assembly includes a first bridging gear and a first connecting rod for connecting to an external wheel. The first bridging gear is located in the accommodating space and meshes with the first transmission mechanism. One end of the first connecting rod is located in the accommodating space and fixedly connected to the first bridging gear, and the other end passes through the second through hole.

[0019] The second bridging component includes a second bridging gear and a second connecting rod for connecting to another external wheel. The second bridging gear is located within the accommodation space and meshes with the second transmission mechanism. One end of the second connecting rod is located within the accommodation space and is fixedly connected to the second bridging gear, and the other end passes through the third through hole.

[0020] The present utility model also provides a toy remote control model car, which includes a driving axle assembly device as described above.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] In the present utility model, the force exerted by the driving motor on the fork is opposite to the force exerted by the pushing spring on the fork. The forces exerted by the driving motor and the pushing spring on the fork will both be converted into the force exerted by the fork on the differential lock block, so as to achieve the engagement or separation of the differential lock block and the synchronizing gear. When the differential needs to play a differential role, the driving motor is turned on, so that the force of the driving motor on the fork is greater than the force of the pushing spring on the fork. The fork drives the differential lock block to separate from the synchronizing gear, and the force exerted by the main driving component will be selectively distributed to the first transmission mechanism and the second transmission mechanism as needed, so that the speeds of the wheels installed on both sides of the driving axle assembly device are inconsistent; when the differential does not need to play a differential role, the driving motor is turned on, so that the force of the driving motor on the fork is less than the force of the pushing spring on the fork. The fork drives the differential lock block to engage with the synchronizing gear, and the synchronizing gear and the differential lock block rotate synchronously with the first transmission mechanism together. The force exerted by the main driving component will be evenly distributed to the first transmission mechanism and the second transmission mechanism, so that the speeds of the wheels on both sides of the driving axle assembly device are the same, thereby enabling the toy remote control model car to smoothly pass through rough roads. Description of the Drawings

[0023] Figure 1 is the structural schematic diagram of the driving axle assembly device provided by the embodiment of the present utility model Figure 1 ;

[0024] Figure 2 is Figure 1 the explosion Figure 1 ;

[0025] Figure 3 is Figure 2 the partial enlarged schematic diagram at A in

[0026] Figure 4 is Figure 1 the explosion Figure 2 ;

[0027] Figure 5 is the structural schematic diagram of the driving axle assembly device provided by the embodiment of the present utility model Figure 2 ;

[0028] Figure 6 Explosion diagram of Figure 5 ;

[0029] Figure 7 Explosion diagram of the partial enlarged view at position B in Figure 6 ;

[0030] Figure 8 Explosion diagram of the drive axle assembly device provided by the embodiment of the present utility model after removing the housing;

[0031] Figure 9 Explosion diagram of the lock provided by the embodiment of the present utility model;

[0032] Figure 10 Structural schematic diagram of the shift fork provided by the embodiment of the present utility model;

[0033] Figure 11 Structural schematic diagram of the planetary gear set provided by the embodiment of the present utility model after removing the sealing cover;

[0034] Figure 12 Structural schematic diagram of the synchronizing gear provided by the embodiment of the present utility model.

[0035] In the figure:

[0036] 10. Housing; 11. Accommodating space; 12. Wire hole; 13. First perforation; 14. Second perforation; 15. Third perforation; 16. Main housing; 161. First through hole; 162. Second through hole; 17. Cover plate; 18. Side cover; 20. Differential; 21. Synchronizing gear; 211. Card slot; 212. Tooth disc; 213. Circular boss; 22. Planetary gear set; 221. Sealing cover; 222. Cross; 223. First bevel gear; 224. Second bevel gear; 23. First transmission mechanism; 231. First internal gear; 232. First shaft rod; 233. First external gear; 24. Second transmission mechanism; 241. Second internal gear; 242. Second shaft rod; 243. Second external gear; 30. Main drive assembly; 31. Driving gear; 32. Connecting rod; 33. Fourth bearing; 40. Lock; 41. Differential lock shift block; 411. Annular groove; 412. Waist-shaped hole; 413. Sliding disc; 414. Locking teeth; 42. Shift fork; 421. Arc fork; 422. Support arm; 4221. Pin hole; 423. Positioning column; 424. Rotating rod; 43. Push spring; 44. Connecting assembly; 441. Steel wire rope; 442. Connecting block; 45. First bearing; 50. Second bearing; 60. Third bearing; 70. First bridging assembly; 71. First bridging gear; 72. First connecting rod; 80. Second bridging assembly; 81. Second bridging gear; 82. Second connecting rod. Detailed implementation manners

[0037] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0038] Please refer to Figures 1 to 10 As shown, an embodiment of the present utility model discloses a driving axle assembly device, which includes a housing 10, a differential 20, a main drive assembly 30, and a locking device 40. The differential 20 is located inside the housing 10. The differential 20 includes a synchronizing gear 21, a planetary gear set 22, a first transmission mechanism 23, and a second transmission mechanism 24. The first transmission mechanism 23 is located on the right side of the planetary gear set 22, and the second transmission mechanism 24 is located on the left side of the planetary gear set 22. The synchronizing gear 21 is sleeved on one end of the first transmission mechanism 23 and is connected to the planetary gear set 22. The synchronizing gear 21 is idly connected to the first transmission mechanism 23. When the synchronizing gear 21 rotates, the entire planetary gear set 22 will rotate synchronously with the synchronizing gear 21. One end of the planetary gear set 22 meshes with the first transmission mechanism 23, and the other end meshes with the second transmission mechanism 24. The main drive assembly 30 passes through the housing 10 and meshes with the synchronizing gear 21. The main drive assembly 30 is used to connect to an external power source. When the main drive assembly 30 rotates, the synchronizing gear 21 follows the main drive assembly 30 to rotate, and the synchronizing gear 21 in turn drives the planetary gear set 22 to rotate. The rotation of the planetary gear set 22 can drive the first transmission mechanism 23 and the second transmission mechanism 24 to rotate respectively. The first transmission mechanism 23 and the second transmission mechanism 24 can achieve differential rotation. The principle of the differential 20 is a conventional technical principle for those skilled in the art and will not be elaborated here.

[0039] The locking device 40 includes a differential lock shift block 41, a shift fork 42, a pushing spring 43, an engagement assembly 44, and a driving motor (not shown in the figure). The differential lock shift block 41, the shift fork 42, and the pushing spring 43 are all located inside the housing 10. The differential lock shift block 41 is sleeved on the first transmission mechanism 23 and can move along the axial direction of the first transmission mechanism 23. The rotation of the differential lock shift block 41 can drive the first transmission mechanism 23 to rotate. The differential lock shift block 41 rotates synchronously with the first transmission mechanism 23. The shift fork 42 is rotatably installed on the housing 10 and is movably connected to the differential lock shift block 41. The pushing spring 43 is annular. One end of the engagement assembly 44 is located inside the housing 10 and is connected to the shift fork 42, and the other end passes through the pushing spring 43 and the housing 10 and is connected to the driving motor. The pushing spring 43 is sleeved on the engagement assembly 44. The two ends of the pushing spring 43 are respectively connected to the inner wall of the housing 10 and the shift fork 42. Under the action of the pushing spring 43, the driving motor can drive the differential lock shift block 41 to engage or disengage with the synchronizing gear 21.

[0040] Specifically, when the differential 20 needs to function as a differential, the drive motor is turned on. The drive motor acts on the fork 42, applying an outward pulling force to the fork 42, such that the force exerted by the drive motor on the fork 42 is greater than the force exerted by the pushing spring 43 on the fork 42. The fork 42 drives the differential lock block 41 to separate from the synchronizing gear 21 and causes the differential lock block 41 to abut against the inner wall of the housing 10. At this time, the pushing spring 43 is in a compressed state, and the force applied by the main drive assembly 30 will be selectively distributed to the first transmission mechanism 23 and the second transmission mechanism 24 as needed, causing the wheel speeds at both ends of the drive axle assembly device to be inconsistent, thus functioning as a differential to enable the toy remote control model car to stably pass through a turning section; when the differential 20 does not need to function as a differential, the drive motor is turned on, such that the force exerted by the drive motor on the fork 42 is less than the force exerted by the pushing spring 43 on the fork 42. Under the elastic force of the pushing spring 43, the fork 42 drives the differential lock block 41 to engage with the synchronizing gear 21. The synchronizing gear 21 and the differential lock block 41 rotate synchronously with the first transmission mechanism 23 together, and the force applied by the main drive assembly 30 will be evenly distributed to the first transmission mechanism 23 and the second transmission mechanism 24, thereby enabling the toy remote control model car to smoothly pass through rough roads.

[0041] In this embodiment, the fork 42 includes an arc fork 421, a support arm 422, two positioning posts 423, and two rotating rods 424. The arc fork 421 is an arc-shaped rod body. The two positioning posts 423 respectively protrude from both ends of the inner wall of the arc fork 421. The two rotating rods 424 both protrude from the outer wall of the arc fork 421. The support arm 422 protrudes from one side wall of the arc fork 421. The arc fork 421 is rotatably mounted on the inner wall of the housing 10 through the two rotating rods 424. The differential lock block 41 is provided with an annular groove 411, and the two positioning posts 423 are both inserted into the annular groove 411. The connection assembly 44 is connected to the support arm 422. The pushing spring 43 is sleeved on the connection assembly 44. One end of the pushing spring 43 abuts against the inner wall of the housing 10, and the other end abuts against the support arm 422.

[0042] The connection assembly 44 includes a steel wire rope 441 and a connection block 442. The support arm 422 is provided with a pin hole 4221 in a penetrating manner. The housing 10 is provided with a receiving space 11 and a wire hole 12 communicating with the receiving space 11. The differential 20, the differential lock block 41, the fork 42, the pushing spring 43, and the connection block 442 are all located in the receiving space 11. The pushing spring 43 is sleeved on the steel wire rope 441. One end of the steel wire rope 441 is connected to the connection block 442, and the other end sequentially passes through the pin hole 4221, the pushing spring 43, and the wire hole 12 and is then connected to the drive motor, such that the drive motor can drive the fork 42 to push the differential lock block 41 to reciprocate on the first transmission mechanism 23 under the action of the pushing spring 43.

[0043] In some embodiments, the lock 40 further includes two first bearings 45. The two rotating rods 424 are respectively rotatably mounted on the inner wall of the accommodation space 11 through the two first bearings 45 to enhance the flexibility of the fork 42 to rotate.

[0044] Please further refer to Figures 6 to 12 , in this embodiment, the first transmission mechanism 23 includes a first internal gear 231, a first shaft 232, and a first external gear 233. The two ends of the first shaft 232 are respectively fixedly connected to the first internal gear 231 and the first external gear 233. The first internal gear 231 meshes with the planetary gear set 22. The differential lock block 41 has a kidney-shaped hole 412. The two ends of the first shaft 232 are both flat shapes that cooperate with the kidney-shaped hole 412. The middle part of the first shaft 232 is a circular structure. The differential lock block 41 is slidably mounted on the flat position of the first shaft 232 through its kidney-shaped hole 412 and rotates synchronously with the first shaft 232. The synchronizing gear 21 has a circular hole. The synchronizing gear 21 is located between the differential lock block 41 and the first internal gear 231. The synchronizing gear 21 is mounted on the flat position of one end of the first shaft 232 through its circular hole and idles relative to the first shaft 232. The synchronizing gear 21 wraps the first internal gear 231. When the differential lock block 41 is engaged with the synchronizing gear 21, the rotation of the main drive assembly 30 can drive the synchronizing gear 21 to rotate. The synchronizing gear 21 and the differential lock block 41 rotate synchronously with the first shaft 232 together, thereby driving the first external gear 233 to rotate. The force applied by the main drive assembly 30 will be evenly distributed to the first transmission mechanism 23 and the second transmission mechanism 24, so that the driving forces on both sides of the drive axle assembly device are the same, so that the toy remote control model car can smoothly pass through rough roads. The first internal gear 231 is a bevel gear.

[0045] The differential lock block 41 includes a sliding disc 413 and a plurality of teeth 414 protruding from one side of the sliding disc 413. The sliding disc 413 is slidably mounted on the first shaft 232. A plurality of slots 211 are correspondingly provided on the side surface of the synchronizing gear 21. When the differential 20 needs to stop differential action, each tooth 414 can be engaged in each slot 211, so that the synchronizing gear 21 and the differential lock block 41 rotate synchronously with the first transmission mechanism 23 together. An annular groove 411 is provided on the sliding disc 413.

[0046] The second transmission mechanism 24 includes a second internal gear 241, a second shaft 242, and a second external gear 243. The two ends of the second shaft 242 are also flat. The two ends of the second shaft 242 are respectively fixedly connected to the second internal gear 241 and the second external gear 243. The second internal gear 241 meshes with the planetary gear set 22. The second internal gear 241 is a bevel gear.

[0047] It can be understood that when the differential lock shifting block 41 is not engaged with the synchronizing gear 21, the rotation of the main drive assembly 30 can drive the synchronizing gear 21 to rotate, thereby driving the planetary gear set 22 to rotate. The rotation of the planetary gear set 22 can drive the first internal gear 231 and the second internal gear 241 engaged with it to rotate respectively, and a speed difference will be formed between the first internal gear 231 and the second internal gear 241 on a turning section. When the differential lock shifting block 41 is engaged with the synchronizing gear 21, the rotation of the main drive assembly 30 can drive the synchronizing gear 21 to rotate. The rotation of the synchronizing gear 21 can drive the differential lock shifting block 41 and the planetary gear set 22 to rotate. The rotation of the differential lock shifting block 41 drives the first transmission mechanism 23 to rotate, and the rotation of the planetary gear set 22 drives the second transmission mechanism 24 to rotate. At this time, the differential 20 does not function as a differential.

[0048] The planetary gear set 22 includes a sealing cover 221, a cross 222, two oppositely arranged first bevel gears 223 and two oppositely arranged second bevel gears 224. The sealing cover 221 is an arc-shaped cover structure, and the middle position of the sealing cover 221 also has a circular hole. One end of the sealing cover 221 is rotatably connected to the second shaft rod 242 through its circular hole, and the other end is fixedly connected to the synchronizing gear 21 and encloses a receiving space with the synchronizing gear 21. The cross 222, the first bevel gears 223, the second bevel gears 224, the first internal gear 231 and the second internal gear 241 are all located in the receiving space. The cross 222 is fixedly connected to the inner wall of the receiving space. The two first bevel gears 223 are respectively fixed at both ends of the cross 222, and the two second bevel gears 224 are respectively fixed at the other two ends of the cross 222. One end of the first bevel gear 223 is engaged with the first internal gear 231, and the other end is engaged with the second internal gear 241. One end of the second bevel gear 224 is engaged with the first internal gear 231, and the other end is engaged with the second internal gear 241. The first bevel gear 223 and the second bevel gear 224 can both revolve around the first transmission mechanism 23 together with the synchronizing gear 21, and at the same time, they can also rotate by themselves, so that the speeds of the wheels respectively connected to both ends of the drive axle assembly device are inconsistent, forming a speed difference. When the differential lock shifting block 41 is engaged with the synchronizing gear 21, the revolution is cancelled, and the first bevel gear 223 and the second bevel gear 224 only have self-rotation left. The force applied by the main drive assembly 30 will be evenly distributed to the first transmission mechanism 23 and the second transmission mechanism 24, so that the driving forces on both sides of the drive axle assembly device are the same, enabling the toy remote control model car to smoothly pass through bad roads.

[0049] In some embodiments, the drive axle assembly device includes a second bearing 50 and a third bearing 60. The synchronizing gear 21 includes a gear disk 212 and a circular boss 213 protruding from one side of the gear disk 212. Each card slot 211 is provided on the circular boss 213. The main drive assembly 30 meshes with the gear disk 212. The second bearing 50 is sleeved on the circular boss 213 and connected to the inner wall of the housing 10. The third bearing 60 is sleeved on the sealing cover 221 and connected to the inner wall of the housing 10, so that the synchronizing gear 21 and the planetary gear set 22 rotate more stably after assembly.

[0050] Please continue to refer to Figures 2 to 8 , in this embodiment, the main drive assembly 30 includes a driving gear 31 and a connecting rod 32. The housing 10 is further provided with a first through hole 13 communicating with the accommodation space 11. The driving gear 31 is located in the accommodation space 11 and meshes with the synchronizing gear 21. One end of the connecting rod 32 is located in the accommodation space 11 and fixedly connected to the driving gear 31, and the other end extends outside the housing 10 through the first through hole 13 for connection with an external power source, and the power source can be an engine.

[0051] In some embodiments, the main drive assembly 30 further includes two fourth bearings 33. Both of the two fourth bearings 33 are sleeved on the connecting rod 32 and connected to the inner wall of the housing 10, so that the driving gear 31 rotates more stably.

[0052] The drive axle assembly device further includes a first bridging assembly 70 and a second bridging assembly 80. The housing 10 is further provided with a second through hole 14 and a third through hole 15. Both the second through hole 14 and the third through hole 15 communicate with the accommodation space 11. The first bridging assembly 70 includes a first bridging gear 71 and a first connecting rod 72. The first bridging gear 71 is located in the accommodation space 11 and meshes with the first transmission mechanism 23. One end of the first connecting rod 72 is located in the accommodation space 11 and fixedly connected to the first bridging gear 71, and the other end is used for connection with an external wheel after passing through the second through hole 14.

[0053] The second bridging assembly 80 includes a second bridging gear 81 and a second connecting rod 82. The second bridging gear 81 is located in the accommodation space 11 and meshes with the second transmission mechanism 24. One end of the second connecting rod 82 is located in the accommodation space 11 and fixedly connected to the second bridging gear 81, and the other end is used for connection with another external wheel after passing through the third through hole 15.

[0054] The housing 10 includes a main housing 16, a cover plate 17 and two side covers 18. The main housing 16 is provided with a first through hole 161 and two second through holes 162. The first through hole 161 is located in the middle of the cover plate 17, and the two second through holes 162 are respectively located on both sides of the cover plate 17. The cover plate 17 is mounted on the main housing 16 and covers the first through hole 161. The two side covers 18 are respectively mounted on both ends of the main housing 16, and the two side covers 18 respectively cover the two second through holes 162. The wire hole 12 and the first perforation 13 are both provided on the main housing 16, and the second perforation 14 and the third perforation 15 are respectively provided on the two side covers 18.

[0055] The present utility model also discloses a toy remote control model car, which includes the driving axle assembly device as described above.

[0056] In summary, in the present utility model, the force applied by the driving motor to the fork 42 is opposite to the force applied by the pushing spring 43 to the fork 42. The forces applied by the driving motor and the pushing spring 43 to the fork 42 will be converted into the force of the fork 42 on the differential lock block 41, so as to realize the engagement or separation of the differential lock block 41 and the synchronizing gear 21. When the differential 20 needs to play a differential role, the driving motor is turned on, so that the force of the driving motor on the fork 42 is greater than the force of the pushing spring 43 on the fork 42. The fork 42 drives the differential lock block 41 to separate from the synchronizing gear 21, and the force applied by the main driving assembly 30 will be selectively distributed to the first transmission mechanism 23 and the second transmission mechanism 24 as needed, so that the speeds of the two wheels are inconsistent; when the differential 20 does not need to play a differential role, the driving motor is turned on, so that the force of the driving motor on the fork 42 is less than the force of the pushing spring 43 on the fork 42. The pushing spring 43 pushes the fork 42 to drive the differential lock block 41 to engage with the synchronizing gear 21. The synchronizing gear 21 and the differential lock block 41 rotate synchronously with the first transmission mechanism 23 together, and the force applied by the main driving assembly 30 will be evenly distributed to the first transmission mechanism 23 and the second transmission mechanism 24, so that the speeds of the two wheels are the same, so that the toy remote control model car can smoothly pass through the bad road surface.

[0057] The above embodiments are only the preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A drive axle assembly device, characterized in that: include: case; A differential, located in the housing, comprising a synchronous gear, a planetary gear set, a first transmission mechanism and a second transmission mechanism, wherein the synchronous gear is sleeved on the first transmission mechanism and connected to the planetary gear set, one end of the planetary gear set is meshed with the first transmission mechanism, and the other end of the planetary gear set is meshed with the second transmission mechanism; a main drive assembly passing through the housing and meshing with the synchronous gear; The locker comprises a differential lock shift block, a shift fork, a push spring, a connection assembly and a drive motor, wherein the differential lock shift block, the shift fork and the push spring are all located in the housing, the differential lock shift block is sleeved on the first transmission mechanism and can move along the axial direction of the first transmission mechanism, the differential lock shift block rotates synchronously with the first transmission mechanism, the shift fork is rotatably installed on the housing and is movably connected with the differential lock shift block, one end of the connection assembly is located in the housing and connected with the shift fork, and the other end is connected with the drive motor after passing through the push spring and the housing, the two ends of the push spring are respectively connected with the inner wall of the housing and the shift fork, and the drive motor can drive the differential lock shift block to engage or separate with the synchronous gear under the action of the push spring.

2. The drive axle assembly device according to claim 1, characterized in that: The shift fork includes an arc fork, a support arm, two positioning columns and two rotating rods. The arc fork is an arc-shaped rod body. The two positioning columns are respectively protruded at the two ends of the inner wall of the arc fork, and the two rotating rods are protruded on the outer wall of the arc fork. The support arm is protruded on the side wall of the arc fork. The arc fork is rotatably installed on the inner wall of the shell through the two rotating rods. The differential lock shift block is provided with an annular groove, and the two positioning columns are inserted into the annular groove. The connecting assembly is connected to the support arm, and the push spring is in contact with the support arm.

3. The drive axle assembly device according to claim 2, characterized in that: The connection assembly includes a steel wire rope and a connection block, the support arm is penetrated by a pin hole, the shell is provided with a accommodating space and a wire hole connected to the accommodating space, the differential, the differential lock shift block, the shift fork, the push spring and the connection block are all located in the accommodating space, one end of the steel wire rope is connected to the connection block, and the other end passes through the pin hole, the push spring and the wire hole in sequence and then is connected to the drive motor.

4. The drive axle assembly device according to claim 2, characterized in that: The first transmission mechanism includes a first internal gear, a first shaft and a first external gear, the two ends of the first shaft are respectively fixedly connected to the first internal gear and the first external gear, the first internal gear is meshed with the planetary gear set, the differential lock shift block is slidably mounted on the first shaft and rotates synchronously with the first shaft, the synchronous gear is mounted on the first shaft and idles relative to the first shaft, and when the differential lock shift block is engaged with the synchronous gear, the synchronous gear and the differential lock shift block rotate synchronously with the first shaft.

5. The drive axle assembly device according to claim 4, characterized in that: The differential lock block includes a sliding disc and a plurality of latching teeth protruding from a side of the sliding disc. The sliding disc is slidably mounted on the first shaft rod. The synchronous gear is provided with a plurality of latching grooves, each of the latching teeth can be latched in each of the latching grooves, and the annular groove is provided on the sliding disc.

6. The drive axle assembly device according to claim 4, characterized in that: The second transmission mechanism includes a second internal gear, a second shaft and a second external gear. Two ends of the second shaft are fixedly connected to the second internal gear and the second external gear respectively. The second internal gear is meshed with the planetary gear set.

7. The drive axle assembly device according to claim 6, characterized in that: The planetary gear set includes a sealing cover, a cross, two oppositely arranged first bevel gears and two oppositely arranged second bevel gears, one end of the sealing cover is idly connected to the second shaft, the other end is fixedly connected to the synchronous gear and enclosed with the synchronous gear to form a storage space, the cross, the first bevel gear, the second bevel gear, the first internal gear and the second internal gear are all located in the storage space, the cross is fixedly connected to the inner wall of the storage space, the two first bevel gears are respectively fixed to the two ends of the cross, the two second bevel gears are respectively fixed to the other two ends of the cross, one end of the first bevel gear is meshed with the first internal gear, and the other end is meshed with the second internal gear, one end of the second bevel gear is meshed with the first internal gear, and the other end is meshed with the second internal gear.

8. The drive axle assembly device according to claim 3, characterized in that: The main drive assembly includes a driving gear and a connecting rod for connecting to an external power source. The shell is also provided with a first through hole connected to the accommodating space. The driving gear is located in the accommodating space and meshes with the synchronous gear. One end of the connecting rod is located in the accommodating space and fixedly connected to the driving gear, and the other end extends to the outside of the shell after passing through the first through hole.

9. The drive axle assembly device according to claim 3, characterized in that: The drive axle assembly device further includes a first axle assembly and a second axle assembly, the housing is further provided with a second through hole and a third through hole, the second through hole and the third through hole are both communicated with the accommodating space, the first axle assembly includes a first axle gear and a first connecting rod for connecting with an external wheel, the first axle gear is located in the accommodating space and meshes with the first transmission mechanism, one end of the first connecting rod is located in the accommodating space and fixedly connected with the first axle gear, and the other end passes through the second through hole; The second bridging assembly includes a second bridging gear and a second connecting rod for connecting to another external wheel. The second bridging gear is located in the accommodating space and meshes with the second transmission mechanism. One end of the second connecting rod is located in the accommodating space and fixedly connected to the second bridging gear, and the other end passes through the third through hole.

10. A toy remote control model car, characterized in that: It comprises a drive axle assembly device as described in any one of claims 1 to 9.

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