Differential gear box of model car

Abstract

The utility model discloses a model car differential gear box which comprises a first shell and a second shell, the first shell and the second shell are jointly attached to form an outer shell, a differential device is installed in the outer shell, the first shell and the second shell are connected and fixed through a plurality of fastening mechanisms, the differential device comprises a differential mechanism, and the first shell and the second shell are fixedly connected through the fastening mechanisms. The differential mechanism comprises a first rotating shell and a second rotating shell, the first rotating shell and the second rotating shell jointly form a sleeve, a first bevel gear and a second bevel gear are installed on the two sides of the interior of the sleeve respectively, a first transmission mechanism is meshed with the interior of the first bevel gear, and a second transmission mechanism is meshed with the interior of the second bevel gear. A short shaft is installed between the first bevel gear and the second bevel gear, and a plurality of round rods are arranged on the outer edge face of the short shaft around the axis of the short shaft in an annular array at equal intervals.

Description

Technical Field

[0001] The utility model relates to the technical field of differential gearboxes, in particular to a differential gearbox for a model car. Background Technique

[0002] A vehicle model is a model made according to the ratio of a means of transportation as a prototype. It can be divided into a non-operable static viewing model car, a simple four-wheel drive track car, and a straight-line racing car. When the model car needs to turn during driving, the wheels are usually driven by a differential gearbox inside the model car to rotate differentially.

[0003] However, for the existing differential gearboxes of model cars, bolts are usually used in combination with nuts for fixation. However, when the bolts and nuts are installed with great force, the phenomenon of misaligned threads will occur, and after repeated disassembly and assembly, the threads on the bolts will wear, reducing the connection stability of the gearbox. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a differential gearbox for a model car, which has the advantages of stable structure and convenient disassembly and assembly, and solves the problem of misaligned threads that will occur after long-term use of the current bolt and screw combination for fixing the gearbox.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A differential gearbox for a model car, including a first housing and a second housing. The first housing and the second housing jointly form an outer shell. A differential device is installed inside the outer shell, and the first housing and the second housing are connected and fixed by a plurality of fastening mechanisms. The differential device includes a differential mechanism. The differential mechanism includes a first rotating shell and a second rotating shell. The first rotating shell and the second rotating shell jointly form a sleeve. On both sides inside the sleeve, a first bevel gear and a second bevel gear are respectively installed. Among them, a first transmission mechanism is internally engaged with the first bevel gear, a second transmission mechanism is internally engaged with the second bevel gear, and a short shaft is installed between the first bevel gear and the second bevel gear. A plurality of round rods are equidistantly arranged in a circular array around the axis of the outer edge surface of the short shaft. Third bevel gears are arranged on the outer edge surfaces of the plurality of round rods. On both sides of each third bevel gear, it is respectively meshed with the first bevel gear and the second bevel gear.

[0006] Preferably, a plurality of teeth are arranged on the outer side of the second rotating shell, and an output shaft is meshed with the plurality of teeth. The output shaft is perpendicular to the axis of the second rotating shell, and three round rods are provided.

[0007] Preferably, the fastening mechanism includes a short rod. One end of the short rod is provided with a limiting block embedded in the first housing, and the other end penetrates through the first housing and extends into the second housing. Moreover, a plurality of fastening grooves are formed on the outer edge surface of the end of the short rod away from the limiting block. The plurality of fastening grooves are all arranged in a spiral shape on the outer edge surface of the short rod, and a guiding groove is formed at one end of each fastening groove away from the limiting block. A fastening ring is sleeved on the end of the short rod where the guiding groove is formed, and a convex column embedded in the fastening groove is arranged on the side of the fastening ring facing the short rod.

[0008] Preferably, a driving ring is slidably connected to the end of the outer edge surface of the fastening ring away from the limiting block, and a spring is sleeved on the outer edge surface of the fastening ring. One end of the spring is placed in the middle of the outer edge surface of the fastening ring, and the other end abuts against the side surface of the driving ring. An internal hexagonal nut is arranged at the end of the driving ring away from the limiting block, and a plurality of clamping strips are arranged at the end of the driving ring away from the limiting block. A groove for fitting the plurality of clamping strips is formed in the second housing.

[0009] Preferably, the limiting block is embedded in the first housing, and the fastening ring is rotatably connected to the second housing.

[0010] Preferably, the first transmission mechanism includes a first rotating shaft. First bearings are installed at both ends of the first rotating shaft, and a first gear meshing with the first bevel gear is arranged on the outer edge surface of the end of the first rotating shaft facing the first bevel gear. A connecting rod extending into the second transmission mechanism is arranged at the end of the first rotating shaft where the first gear is installed.

[0011] Preferably, the second transmission mechanism includes a second rotating shaft. Second bearings are arranged at both ends of the second rotating shaft, and the end of the second rotating shaft facing the second bevel gear is embedded inside the second bevel gear and a second gear is arranged.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. By providing a short rod, a limiting block, fastening grooves, guiding grooves, a fastening ring, a convex column, a driving ring, a spring and an internal hexagonal nut, the present utility model inserts the short rod into the first housing. The rotation of the short rod is restricted by the limiting block embedded in the first housing. The convex column inside the fastening ring is embedded into the guiding groove. Press the internal hexagonal nut to release the fixation between the driving ring and the second housing. Rotate the internal hexagonal nut to drive the driving ring and the fastening ring to rotate. After the distance between the limiting block and the fastening ring is shortened by the rotation of the convex column in the fastening groove, release the internal hexagonal nut, and the spring pushes the driving ring to be clamped into the second housing to complete the fixation between the first housing and the second housing, which is convenient for the installation in the early stage and the disassembly in the later stage.

[0014] 2. The utility model is provided with a first bevel gear, a second bevel gear, a short shaft, a round rod and a third bevel gear. Through the three round rods arranged on the outer edge surface of the short shaft, and the three third bevel gears meshing with the first bevel gear and the second bevel gear, the connection between the first transmission mechanism and the second transmission mechanism can be made more stable, and there are more differential ratios. Brief Description of the Drawings

[0015] Figure 1 is a front view structural schematic diagram of the utility model;

[0016] Figure 2 is a structural schematic diagram of the differential device of the utility model;

[0017] Figure 3 is a split schematic diagram of the differential device of the utility model;

[0018] Figure 4 is of the utility model Figure 1 a split schematic diagram of the fastening mechanism therein.

[0019] The reference numerals and names in the drawings are as follows:

[0020] 1. First housing; 2. Second housing; 3. Differential device; 4. Fastening mechanism; 41. Short rod; 42. Limiting block; 43. Fastening groove; 44. Guide groove; 45. Fastening ring; 46. Convex column; 47. Driving ring; 48. Spring; 49. Hexagon socket head cap screw; 5. Differential mechanism; 51. First rotating housing; 52. Second rotating housing; 53. Teeth; 54. First bevel gear; 55. Second bevel gear; 56. Short shaft; 57. Round rod; 58. Third bevel gear; 6. First transmission mechanism; 61. First rotating shaft; 62. First bearing; 63. First gear; 64. Connecting rod; 7. Second transmission mechanism; 71. Second rotating shaft; 72. Second bearing; 73. Second gear; 8. Output shaft. Detailed Description of the Preferred Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0023] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 4, an embodiment provided by the present utility model: a differential gearbox for a model car, comprising a first housing 1 and a second housing 2. The first housing 1 and the second housing 2 are jointly attached to form an outer shell. A differential device 3 is installed inside the outer shell, and the first housing 1 and the second housing 2 are connected and fixed by a plurality of fastening mechanisms 4. The differential device 3 includes a differential mechanism 5. The differential mechanism 5 includes a first rotating shell 51 and a second rotating shell 52. The first rotating shell 51 and the second rotating shell 52 jointly form a sleeve. On both sides inside the sleeve, a first bevel gear 54 and a second bevel gear 55 are respectively installed. Among them, a first transmission mechanism 6 is internally engaged with the first bevel gear 54, a second transmission mechanism 7 is internally engaged with the second bevel gear 55, and a short shaft 56 is installed between the first bevel gear 54 and the second bevel gear 55. A plurality of round rods 57 are equidistantly arranged in a circular array around the axis of the outer edge surface of the short shaft 56. Third bevel gears 58 are arranged on the outer edge surfaces of the plurality of round rods 57. On both sides of each third bevel gear 58, it is respectively engaged with the first bevel gear 54 and the second bevel gear 55. A plurality of teeth 53 are arranged on the outer side of the second rotating shell 52. An output shaft 8 is engaged with the plurality of teeth 53. The output shaft 8 is perpendicular to the axis of the second rotating shell 52. There are three round rods 57. Specifically, when implemented, the end of the round rod 57 extends out of the sleeve. The fastening mechanism 4 includes a short rod 41. One end of the short rod 41 is provided with a limiting block 42 embedded in the first housing 1, and the other end passes through the first housing 1 and extends into the second housing 2. Moreover, a plurality of fastening grooves 43 are opened on the outer edge surface of the end of the short rod 41 away from the limiting block 42. The plurality of fastening grooves 43 are all arranged in a spiral shape on the outer edge surface of the short rod 41, and a guiding groove 44 is opened at one end of each fastening groove 43 away from the limiting block 42. A fastening ring 45 is sleeved on the end of the short rod 41 provided with the guiding groove 44. A convex column 46 embedded in the fastening groove 43 is arranged on the side of the fastening ring 45 facing the short rod 41. A driving ring 47 is slidably connected to the end of the outer edge surface of the fastening ring 45 away from the limiting block 42. Moreover, a spring 48 is sleeved on the outer edge surface of the fastening ring 45. One end of the spring 48 is placed in the middle of the outer edge surface of the fastening ring 45, and the other end abuts against the side surface of the driving ring 47. An internal hexagonal nut 49 is arranged at the end of the driving ring 47 away from the limiting block 42, and a plurality of clamping strips are arranged at the end of the driving ring 47 away from the limiting block 42. A groove for the plurality of clamping strips to be fitted is opened in the second housing 2. The limiting block 42 is embedded in the first housing 1. The fastening ring 45 is rotatably connected to the second housing 2. The first transmission mechanism 6 includes a first rotating shaft 61. First bearings 62 are installed at both ends of the first rotating shaft 61. Moreover, a first gear 63 engaged with the first bevel gear 54 is arranged on the outer edge surface of the end of the first rotating shaft 61 facing the first bevel gear 54. A connecting rod 64 extending into the second transmission mechanism 7 is arranged at the end of the first rotating shaft 61 where the first gear 63 is installed. The second transmission mechanism 7 includes a second rotating shaft 71. Second bearings 72 are arranged at both ends of the second rotating shaft 71. Moreover, a second gear 73 is embedded inside the second bevel gear 55 and arranged at the end of the second rotating shaft 71 facing the second bevel gear 55. Specifically, when implemented,The outer edge surface of the gear is limited by the housing. Specifically, in actual implementation, the working principle of the differential device 3 is the same as that of common differential gearboxes on the market, and will not be described in detail here.

[0025] Working principle: Insert the short rod 41 into the interior of the first housing 1. The limiting block 42 is embedded in the interior of the first housing 1 to limit the rotation of the short rod 41. The convex column 46 inside the fastening ring 45 is embedded in the guiding groove 44. Press the hexagon socket head cap nut 49 to release the fixation between the driving ring 47 and the second housing 2. Rotate the hexagon socket head cap nut 49 to drive the driving ring 47 and the fastening ring 45 to rotate. After the distance between the limiting block 42 and the fastening ring 45 is shortened by the rotation of the convex column 46 in the fastening groove 43, release the hexagon socket head cap nut 49, and the driving ring 47 is pushed by the spring 48 to be clamped into the second housing 2 to complete the fixation between the first housing 1 and the second housing 2.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A model car differential gearbox, comprising a first housing (1) and a second housing (2), characterized in that: The first housing (1) and the second housing (2) are fitted together to form an outer shell, a differential device (3) is installed in the outer shell, and the first housing (1) and the second housing (2) are connected and fixed by a plurality of fastening mechanisms (4), the differential device (3) comprises a differential mechanism (5), the differential mechanism (5) comprises a first rotating shell (51) and a second rotating shell (52), the first rotating shell (51) and the second rotating shell (52) together form a sleeve, and a first bevel gear (54) and a second bevel gear (55) are installed on both sides of the sleeve. , wherein a first transmission mechanism (6) is meshed inside the first bevel gear (54), a second transmission mechanism (7) is meshed inside the second bevel gear (55), and a short shaft (56) is installed between the first bevel gear (54) and the second bevel gear (55), and a plurality of round rods (57) are arranged equidistantly in a ring array around the axis of the short shaft (56) on the outer edge surface, and a third bevel gear (58) is arranged on the outer edge surface of the plurality of round rods (57), and both sides of each of the third bevel gears (58) are respectively meshed with the first bevel gear (54) and the second bevel gear (55).

2. A model car differential gearbox according to claim 1, characterized in that: A plurality of teeth (53) are arranged on the outer side of the second rotating shell (52), and an output shaft (8) is meshed on the plurality of teeth (53). The output shaft (8) is perpendicular to the axis of the second rotating shell (52), and three round rods (57) are arranged.

3. A model car differential gearbox according to claim 1, characterized in that: The fastening mechanism (4) comprises a short rod (41), one end of which is provided with a limit block (42) embedded in the first shell (1), and the other end of which penetrates the first shell (1) and extends into the second shell (2), and a plurality of fastening grooves (43) are provided on the outer edge surface of one end of the short rod (41) away from the limit block (42), the plurality of fastening grooves (43) are all arranged in a spiral shape on the outer edge surface of the short rod (41), and a guide groove (44) is provided on the end of each fastening groove (43) away from the limit block (42), a fastening ring (45) is sleeved on the end of the short rod (41) provided with the guide groove (44), and a convex column (46) embedded in the fastening groove (43) is provided in the fastening ring (45) on the side facing the short rod (41).

4. A model car differential gearbox according to claim 3, characterized in that: The end of the outer edge surface of the fastening ring (45) away from the limit block (42) is slidably connected to a driving ring (47), and the outer edge surface of the fastening ring (45) is sleeved with a spring (48), one end of the spring (48) is placed in the middle of the outer edge surface of the fastening ring (45), and the other end abuts against the side surface of the driving ring (47), the end of the driving ring (47) away from the limit block (42) is provided with a hexagonal nut (49), and the end of the driving ring (47) away from the limit block (42) is provided with a plurality of clamping strips, and the second shell (2) is provided with grooves for the plurality of clamping strips to be embedded.

5. A model car differential gearbox according to claim 3, characterized in that: The limit block (42) is embedded in the first shell (1), and the fastening ring (45) is rotatably connected to the second shell (2).

6. A model car differential gearbox according to claim 1, characterized in that: The first transmission mechanism (6) comprises a first rotating shaft (61), both ends of the first rotating shaft (61) are equipped with first bearings (62), and an outer edge surface of one end of the first rotating shaft (61) facing the first bevel gear (54) is provided with a first gear (63) meshing with the first bevel gear (54), and one end of the first rotating shaft (61) equipped with the first gear (63) is provided with a connecting rod (64) extending into the second transmission mechanism (7).

7. A model car differential gearbox according to claim 1, characterized in that: The second transmission mechanism (7) comprises a second rotating shaft (71), both ends of the second rotating shaft (71) are provided with second bearings (72), and one end of the second rotating shaft (71) facing the second bevel gear (55) is embedded in the second bevel gear (55) and is provided with a second gear (73).

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