Dual differential self-locking gear case

Abstract

The utility model discloses a kind of double differential self-locking gear box, belong to mechanical transmission technical field, to solve the problem that existing gear box cannot stop brake stop, gear meshing buffering force is big and easy to gear, and the current is big and the problem of high noise.It includes shell assembly, power input unit, planetary transmission unit, self-locking unit and power output piece.When motor operates, power is rotated by first gear, center gear, planetary gear driving rotator, and is output by spline;When motor stops, planet carrier is stationary, and planetary gear drives rotator relative self-locking gear ring dislocation jamming to realize self-locking.The utility model improves self-locking reliability, reduces gear damage, reduces operating noise and temperature, and is suitable for vehicle driving and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a dual differential self-locking gearbox. Background Technology

[0002] In the field of mechanical transmission technology, gearboxes, as the core component for power transmission and deceleration, are widely used in various equipment requiring power regulation. In existing technologies, conventional gearboxes mostly achieve deceleration through the speed ratio between gears, and their core transmission logic relies on the meshing of gears with a fixed gear ratio to complete the transmission of power from the input end to the output end.

[0003] However, such traditional gearboxes have obvious defects in practical applications: on the one hand, they can only realize the functions of deceleration and power transmission, and cannot brake and stop when the equipment stops, resulting in the lack of stable self-locking protection when the equipment is stationary or stopped; on the other hand, the buffering force is too large during gear meshing, which can easily cause damage such as gear tooth breakage and deformation. At the same time, the operation is also accompanied by high current and excessive noise, and the rotational stability is poor and the operating temperature is easy to rise, which seriously affects the service life and operational reliability of the gearbox.

[0004] The shortcomings of the existing technologies mentioned above make it difficult for traditional gearboxes to meet the application scenarios with high requirements for transmission stability and braking safety. Therefore, there is an urgent need for a gearbox structure that can solve these defects. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the existing technology, this utility model provides a dual differential self-locking gearbox. It aims to solve the technical problems of existing gearboxes, such as the inability to achieve braking and stopping when stopped, the large meshing buffer force of the gears leading to gear breakage and deformation, and the high current, excessive noise, high temperature and unstable rotation during operation, by using planetary gear transmission and the misaligned structure design of the planetary carrier and the internal gear ring. This ensures that the gearbox can complete the functions of power transmission and deceleration while improving the reliability of self-locking when stopped, reducing the risk of gear damage and ensuring operational stability.

[0006] To achieve the above objectives, this utility model provides a dual differential self-locking gearbox, comprising: a housing assembly, It includes an upper housing, a lower housing, and a fixing post disposed inside the housing assembly. The upper housing and the lower housing are detachably connected and enclose each other to form an installation cavity. The power input unit includes a drive component and a first gear. The drive component is disposed on the outside of the housing assembly. The output end of the drive component extends into the mounting cavity and is connected to the first gear for power input. A planetary transmission unit, disposed within the mounting cavity and in transmission cooperation with the power input unit, includes a central gear, at least one planetary gear, and a planet carrier. The first gear is directly or via an intermediate transmission gear connected to the central gear. The planetary gear is mounted on the planet carrier and meshes with the central gear. The planet carrier is mounted on the fixed column via bearings to achieve power transmission and deceleration. The self-locking unit includes a self-locking gear ring fixed inside the lower housing and a rotating body. The rotating body is located in the mounting cavity and can rotate relative to the housing assembly. The rotating body has a first internal tooth inside, and the self-locking gear ring has a second internal tooth inside. The first internal tooth and the second internal tooth have different numbers of teeth. The planetary gear on the side away from the central gear meshes with both the first internal tooth and the second internal tooth. The power output unit includes a power output component connected to the end of the rotating body away from the planetary gear, for connecting an external load. When the drive unit operates, power is sequentially transmitted through the first gear, the central gear, and the planetary gear to drive the rotating body to rotate, and the power is output through the power output component. When the drive unit stops, the planetary carrier remains stationary due to the cooperation between the bearing and the fixed column, and the planetary gear drives the rotating body to rotate relative to the self-locking gear ring under the action of inertia, so that the first internal teeth and the second internal teeth form a misalignment and locking through the planetary gear, thereby achieving self-locking.

[0007] Furthermore, when the drive unit stops, the planetary carrier remains stationary relative to the fixed column via the bearing. While the planetary gear rotates around its own axis, it drives the rotating body to generate a circumferential displacement relative to the self-locking gear ring, causing the tooth grooves and teeth of the first internal tooth and the second internal tooth to form a misalignment and jamming. The planetary gear is jammed between the two internal teeth, and the rotating body cannot continue to rotate, thereby realizing the self-locking of the gearbox when it stops.

[0008] Furthermore, the upper housing and the lower housing are connected by fasteners, and the fixing post is integrally formed or fixedly connected to the lower housing.

[0009] Furthermore, the number of planetary gears is three, and the three planetary gears are evenly distributed on the planet carrier along the circumference of the central gear.

[0010] Furthermore, the driving component is a drive motor.

[0011] Furthermore, the power output component is a spline, which is used to connect the wheels to drive the vehicle to rotate.

[0012] Furthermore, the planetary gear includes meshing portions distributed vertically, the lower half of which meshes with the second internal tooth of the self-locking gear ring, and the upper half of which meshes with the first internal tooth of the rotating body.

[0013] Furthermore, the central gear includes an upper gear and a lower gear arranged coaxially, both of which mesh with the planetary gear.

[0014] The present invention, by adopting the above technical solution, has at least the following beneficial effects: In this invention, the self-locking unit consists of a self-locking gear ring (with a second internal tooth) fixed inside the lower housing, a rotating body (with a first internal tooth) partially located in the mounting cavity, and planetary gears with different numbers of teeth meshing with two internal teeth simultaneously. Combined with the design that the planetary carrier (with bearings and a fixed column) remains stationary when the drive unit stops, the planetary gears drive the rotating body to form a misalignment and locking relative to the self-locking gear ring, stably achieving the self-locking function when the machine stops. This effectively solves the technical defects of existing gearboxes that cannot achieve braking and stopping and lack self-locking protection when the equipment is stationary, thus improving the safety of the equipment during use.

[0015] In this invention, the planetary transmission unit adopts a central gear and a planetary gear structure mounted on a planetary carrier. The planetary carrier is mounted on a fixed column via bearings. Preferably, there are three planetary gears evenly distributed around the central gear. The central gear is designed to include an upper gear and a lower gear on the same axis. The planetary gears are designed with upper and lower meshing parts that are adapted to a self-locking gear ring and a rotating body, respectively. This design optimizes the power transmission path, disperses the buffering force during gear meshing, reduces the risk of gear breakage and deformation, and improves the overall transmission stability. It also solves the problem of damage and unstable rotation caused by excessive buffering force in existing gearboxes.

[0016] In this invention, the drive component is located on the outside of the housing assembly, which prevents the heat generated by the drive component during operation from directly accumulating in the mounting cavity. Combined with the stable planetary transmission structure, it can reduce the current consumption and noise generation during gearbox operation, reduce the rise in operating temperature, and extend the overall service life of the gearbox. At the same time, the power output component is set as a spline and used to connect the wheels to drive the vehicle to rotate, which can adapt to the power output requirements of vehicles and other equipment, broaden the application scenarios of the gearbox, and solve the defects of poor operating performance and limited application range of existing gearboxes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of the dual differential self-locking gearbox of this utility model; Figure 2 This is a schematic diagram of the lower housing structure of the dual differential self-locking gearbox of this utility model; Figure 3 This is a schematic diagram of the internal structure of the dual differential self-locking gearbox of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the external structure of the dual differential self-locking gearbox of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the external structure of the dual differential self-locking gearbox of this utility model. Figure 3 ; Figure 6 This is a schematic diagram of the external structure of the dual differential self-locking gearbox of this utility model. Figure 4 ; Figure 7 This is a schematic diagram of the external structure of the dual differential self-locking gearbox of this utility model. Figure 5 ; Figure 8 This is a front view of the meshing relationship between the first internal gear, the second internal gear, and the planetary gear of this utility model.

[0019] In the diagram: 1. Upper housing; 2. Lower housing; 3. Drive component; 4. First gear; 5. Central gear; 51. Upper gear; 52. Lower gear; 6. Planetary gear; 7. Planet carrier; 8. Intermediate transmission gear; 9. Fixed column; 10. Self-locking gear ring; 11. Rotating body; 12. First internal gear; 13. Second internal gear; 14. Power output component; 15. Screw hole. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0021] Please see Figures 1 to 8 As shown, this embodiment provides a dual differential self-locking gearbox, including: a housing assembly, It includes an upper housing 1, a lower housing 2, and a fixing post 9 disposed inside the housing assembly. The upper housing 1 and the lower housing 2 are detachably connected and enclose each other to form an installation cavity. The power input unit includes a drive element 3 and a first gear 4. The drive element 3 is disposed on the outside of the housing assembly. The output end of the drive element 3 extends into the mounting cavity and is connected to the first gear 4 for power input. The planetary transmission unit, disposed within the mounting cavity and in transmission cooperation with the power input unit, includes a central gear 5, at least one planetary gear 6, and a planet carrier 7. The first gear 4 is directly or through an intermediate transmission gear 8 connected to the central gear 5. The planetary gear 6 is mounted on the planet carrier 7 and meshes with the central gear 5. The planet carrier 7 is mounted on the fixed column 9 through bearings to achieve power transmission and deceleration. The self-locking unit includes a self-locking gear ring 10 fixed inside the lower housing 2, and a rotating body 11. The rotating body 11 is partially located in the mounting cavity and can rotate relative to the housing assembly. The rotating body 11 has a first internal tooth 12 inside, and the self-locking gear ring 10 has a second internal tooth 13 inside. The first internal tooth 12 and the second internal tooth 13 have different numbers of teeth. The planetary gear 6 on the side away from the central gear 5 meshes with both the first internal tooth 12 and the second internal tooth 13. The power output unit includes a power output component 14, which is connected to the end of the rotating body 11 away from the planetary gear 6 and is used to connect to an external load. When the drive unit 3 is running, power is sequentially transmitted through the first gear 4, the central gear 5, and the planetary gear 6 to drive the rotating body 11 to rotate, and the power is output through the power output component 14. When the drive unit 3 stops, the planetary carrier 7 remains stationary due to the cooperation between the bearing and the fixed column 9. Under the action of inertia, the planetary gear 6 drives the rotating body 11 to rotate relative to the self-locking gear ring 10, so that the first internal tooth 12 and the second internal tooth 13 form a misalignment and locking through the planetary gear 6, thereby achieving self-locking.

[0022] In one implementation, when the drive component 3 stops, the planetary carrier 7 remains stationary relative to the fixed column 9 via the bearing. While the planetary gear 6 rotates around its own axis, it drives the rotating body 11 to generate a circumferential displacement relative to the self-locking gear ring 10, causing the tooth grooves and teeth of the first internal tooth 12 and the second internal tooth 13 to form a misalignment and jamming. The planetary gear 6 is jammed between the two internal teeth, and the rotating body 11 cannot continue to rotate, thereby realizing the self-locking of the gearbox when it stops.

[0023] In one embodiment, the upper housing 1 and the lower housing 2 are connected by fasteners, and the fixing post 9 is integrally formed or fixedly connected to the lower housing 2.

[0024] In one embodiment, the number of planetary gears 6 in this embodiment is three, and the three planetary gears 6 are evenly distributed on the planet carrier 7 along the circumference of the central gear 5.

[0025] In one implementation, the driving component 3 in this embodiment is a drive motor.

[0026] In one embodiment, the power output component 14 is a spline, which is used to connect the wheels to drive the vehicle to rotate.

[0027] In one embodiment, the planetary gear 6 in this embodiment includes meshing portions distributed vertically. The lower half of the meshing portion meshes with the second internal tooth 13 of the self-locking gear ring 10, and the upper half of the meshing portion meshes with the first internal tooth 12 of the rotating body 11.

[0028] In one embodiment, the central gear 5 in this embodiment includes an upper gear 51 and a lower gear 52 arranged coaxially, and both the upper gear 51 and the lower gear 52 mesh with the planetary gear 6.

[0029] like Figures 3 to 8 As shown, the working principle of the dual differential self-locking gearbox provided in this embodiment is as follows: When the motor rotates, the transmission relationship between the components is as follows: the motor, acting as the driving component 3, operates, and its output end extends into the mounting cavity, driving the first gear 4 to rotate synchronously; because the first gear 4 meshes directly or through the intermediate transmission gear 8 with the central gear 5 of the planetary transmission unit, the rotation of the first gear 4 will drive the central gear 5 to rotate accordingly; the central gear 5 further meshes with the planetary gear 6 rotatably mounted on the planetary carrier 7. Under the driving force of the central gear 5, the planetary gear 6 rotates around its own axis on the one hand, and on the other hand, because the planetary carrier 7 is mounted on the fixed column 9 through bearings (the fixed column 9 is relatively fixed to the lower housing 2), the planetary gear 6... The rotation will be converted into power to drive the rotating body 11 to rotate. Since the side of the planetary gear 6 away from the central gear 5 is simultaneously engaged with the first internal tooth 12 of the rotating body 11, and the self-locking gear ring 10 is fixed inside the lower housing 2 and remains stationary (the self-locking gear ring 10 is provided with a screw hole 15 and is fixed inside the lower housing 2 with bolts), the rotation of the planetary gear 6 can drive the rotating body 11 to rotate relative to the housing assembly. Finally, the power output component 14 (spline) connected to the end of the rotating body 11 away from the planetary gear 6 rotates synchronously with the rotating body 11, transmitting power to the external load (such as a wheel), completing the entire process of power input, deceleration transmission to output.

[0030] When the motor stops rotating, how does the transmission relationship between the components achieve self-locking: After the motor stops running, its output end no longer drives the first gear 4 to rotate, and the central gear 5 also stops rotating; at this time, the planetary carrier 7 cannot rotate due to the cooperation between the bearing and the fixed column 9 (the fixed column 9 is fixed), and remains stationary; while the rotating body 11, due to its previous rotational inertia, still has the tendency to continue rotating, and the first internal tooth 12 of the rotating body 11 will drive the planetary gear 6 to continue rotating around its own axis through meshing; since the planetary gear 6 also meshes with the second internal tooth 13 of the self-locking gear ring 10 (the self-locking gear ring 10 is fixed), and the number of teeth of the first internal tooth 12 and the second internal tooth 13 is different, the rotation of the planetary gear 6 will cause the rotating body 11 to produce circumferential displacement relative to the fixed self-locking gear ring 10; as the displacement accumulates, the teeth of the first internal tooth 12 of the rotating body 11 and the tooth grooves of the second internal tooth 13 of the self-locking gear ring 10 gradually misalign (e.g. Figure 7 and Figure 8 As shown in the labels 12 and 13), planetary gear 6 is stuck between the two internal teeth, and rotating body 11 cannot continue to rotate, thus achieving self-locking of the gearbox when it stops.

[0031] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual differential self-locking gearbox, characterized in that, include: housing components, It includes an upper housing, a lower housing, and a fixing post disposed inside the housing assembly. The upper housing and the lower housing are detachably connected and enclose each other to form an installation cavity. The power input unit includes a drive component and a first gear. The drive component is disposed on the outside of the housing assembly. The output end of the drive component extends into the mounting cavity and is connected to the first gear for power input. A planetary transmission unit, disposed within the mounting cavity and in transmission cooperation with the power input unit, includes a central gear, at least one planetary gear, and a planet carrier. The first gear is directly or via an intermediate transmission gear connected to the central gear. The planetary gear is mounted on the planet carrier and meshes with the central gear. The planet carrier is mounted on the fixed column via bearings to achieve power transmission and deceleration. The self-locking unit includes a self-locking gear ring fixed inside the lower housing and a rotating body. The rotating body is located in the mounting cavity and can rotate relative to the housing assembly. The rotating body has a first internal tooth inside, and the self-locking gear ring has a second internal tooth inside. The first internal tooth and the second internal tooth have different numbers of teeth. The planetary gear on the side away from the central gear meshes with both the first internal tooth and the second internal tooth. The power output unit includes a power output component connected to the end of the rotating body away from the planetary gear, for connecting an external load. When the drive unit operates, power is sequentially transmitted through the first gear, the central gear, and the planetary gear to drive the rotating body to rotate, and the power is output through the power output component. When the drive unit stops, the planetary carrier remains stationary due to the cooperation between the bearing and the fixed column, and the planetary gear drives the rotating body to rotate relative to the self-locking gear ring under the action of inertia, so that the first internal teeth and the second internal teeth form a misalignment and locking through the planetary gear, thereby achieving self-locking.

2. The dual differential self-locking gearbox according to claim 1, characterized in that, When the drive unit stops, the planetary carrier remains stationary relative to the fixed column via the bearing. While the planetary gear rotates around its own axis, it drives the rotating body to generate a circumferential displacement relative to the self-locking gear ring, causing the tooth grooves and teeth of the first internal tooth and the second internal tooth to form a misalignment and jamming. The planetary gear is jammed between the two internal teeth, and the rotating body cannot continue to rotate, thereby realizing the self-locking of the gearbox when it stops.

3. The dual differential self-locking gearbox according to claim 2, characterized in that, The upper housing and the lower housing are connected by fasteners, and the fixing column is integrally formed or fixedly connected to the lower housing.

4. The dual differential self-locking gearbox according to claim 3, characterized in that, The number of planetary gears is three, and the three planetary gears are evenly distributed on the planet carrier along the circumference of the central gear.

5. The dual differential self-locking gearbox according to claim 1, characterized in that, The driving component is a drive motor.

6. The dual differential self-locking gearbox according to claim 1, characterized in that, The power output component is a spline, which is used to connect the wheels to drive the vehicle to rotate.

7. The dual differential self-locking gearbox according to any one of claims 1 to 6, characterized in that, The planetary gear includes meshing portions distributed vertically, the lower half of which meshes with the second internal tooth of the self-locking gear ring, and the upper half of which meshes with the first internal tooth of the rotating body.

8. The dual differential self-locking gearbox according to any one of claims 1 to 6, characterized in that, The central gear includes an upper gear and a lower gear arranged coaxially, and both the upper gear and the lower gear mesh with the planetary gear.

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