CN219866092U - Two-gear gearbox of model car - Google Patents

Abstract

The utility model discloses a two-gear gearbox of a model vehicle, which comprises the following components: the gear shifting device comprises a first transmission shaft, a first high-speed matched gear, a first low-speed matched gear, a combination sleeve, a second transmission shaft and a gear shifting component. The first transmission shaft is provided with a driving gear, the first transmission shaft is rotatably sleeved with a first high-speed matching gear, the first transmission shaft is rotatably sleeved with a first low-speed matching gear, the first low-speed matching gear comprises a gear part and a combining part, and the combining part is connected with the gear part. The combining sleeve is slidably sleeved on the first transmission shaft, can synchronously rotate with the first transmission shaft and is positioned between the combining part and the first high-speed matched gear. The first low-speed matching gear of the two-gear gearbox of the model vehicle is provided with the gear part and the combining part, the diameter of the combining part is larger than that of the gear part, the combining groove can be conveniently arranged on the combining part, the problem that the combining groove cannot be arranged or is inconvenient due to the small diameter of the first low-speed matching gear is solved, and the two-gear gearbox is good in structural stability and longer in service life.

Description

Two-gear gearbox of model car

Technical Field

The utility model relates to the technical field of toys, in particular to a two-gear gearbox of a model car.

Background

In life, some toy vehicles are capable of traveling at different speeds because of the gearbox installed in their bodies, and by using the gearbox, the toy vehicle has two or more different traveling speeds. The gear box is generally composed of a motor, an output gear, a driving gear, a transmission shaft, a high-speed matched gear, a low-speed matched gear, a combining sleeve and a gear shifting component. The output gear is meshed with the driving gear, when the motor works to drive the output gear to rotate, the output gear rotates to drive the driving gear to rotate, the driving gear and the transmission shaft are integrated, the driving gear can drive the transmission shaft to rotate, the high-speed matching gear and the low-speed matching gear are rotatably connected to the transmission shaft and can synchronously rotate with the transmission shaft, the combining sleeve is positioned between the high-speed matching gear and the low-speed matching gear, the gear shifting part is rotatably connected with the combining sleeve, combining convex teeth are respectively arranged on two sides of the combining sleeve, and combining grooves are formed in the high-speed matching gear.

When the gear shifting part slides to drive the combining sleeve to be close to and connected with the high-speed matched gear, the combining convex teeth on the combining sleeve can extend into the combining grooves on the high-speed matched gear, the combining sleeve is connected with the high-speed matched gear, the transmission shaft rotates to drive the combining sleeve to rotate, and the combining sleeve rotates to drive the high-speed matched gear connected with the combining sleeve to rotate. When the gear shifting part slides to drive the combining sleeve to be close to one end of the low-speed matching gear and is connected with the low-speed matching gear, the combining convex teeth on the combining sleeve also need to stretch into the combining grooves on the low-speed matching gear, but the diameter of the low-speed matching gear is too small, so that the combining grooves are not beneficial to being arranged on the low-speed matching gear, if the combining grooves are forcibly arranged, the structural strength of the low-speed matching gear can be influenced, the situation of damage in rotation is easy to occur, and the service life of the low-speed matching gear is shortened. Or, when the diameter of the low-speed mating gear needs to be set smaller, the coupling groove cannot be provided thereon, which causes great difficulty in practical use.

In view of this, the present utility model has been made.

Disclosure of Invention

The utility model provides a two-gear gearbox of a model vehicle.

The utility model provides the following technical scheme:

a two-speed gearbox for a model vehicle, comprising:

the first transmission shaft is provided with a driving gear;

the first high-speed matching gear is rotatably sleeved on the first transmission shaft;

the first low-speed matching gear is rotatably sleeved on the first transmission shaft and comprises a gear part and a combining part, the combining part is connected with the gear part, and the combining part and the gear part are sequentially arranged along the length direction of the first transmission shaft;

the combining sleeve is slidably sleeved on the first transmission shaft, can synchronously rotate with the first transmission shaft and is positioned between the combining part and the first high-speed matching gear;

the second transmission shaft is provided with a second low-speed matched gear and a second high-speed matched gear, the second low-speed matched gear is meshed with the first low-speed matched gear, and the second high-speed matched gear is meshed with the first high-speed matched gear;

the gear shifting component comprises a movable shaft and a shifting fork, the shifting fork is connected to the movable shaft, the shifting fork is rotatably connected with the combining sleeve, and the shifting fork can drive the combining sleeve to move along the first transmission shaft by moving, so that the combining sleeve is combined with any one of the combining part and the first high-speed matched gear.

Optionally, a combining groove is arranged at one end of the combining part, which is away from the gear part, and a combining groove is arranged at one end of the first high-speed matching gear, which is towards the combining part;

the two sides of the combining sleeve are respectively provided with combining convex teeth;

when the combining sleeve moves along the first direction, the combining convex teeth on one side of the combining sleeve can be embedded into the combining grooves on the combining part, and when the combining sleeve moves along the second direction, the combining convex teeth on the other side of the combining sleeve can be embedded into the combining grooves on the first high-speed matching gear.

Optionally, the outer diameter of the coupling portion is larger than the outer diameter of the gear portion.

Optionally, the coupling groove on the coupling portion includes two arc-shaped grooves extending around the circumference of the first transmission shaft.

Optionally, the combination portion and the gear portion are arranged at intervals, and a transition section is arranged between the combination portion and the gear portion.

Optionally, the gear part is provided with a first shaft hole, and the combining part is provided with a second shaft hole;

the first transmission shaft penetrates through the first shaft hole and the second shaft hole;

a first bearing is arranged between the inner wall of the first shaft hole and the first transmission shaft, and a second bearing is arranged between the inner wall of the second shaft hole and the first transmission shaft.

Optionally, a limiting hole is formed in the second transmission shaft, and a limiting rod penetrates through the limiting hole;

the second high-speed matching gear and the second low-speed matching gear are provided with limiting grooves;

and in a state that the second high-speed matched gear or the second low-speed matched gear is arranged on the second transmission shaft, the limiting rod is embedded into the corresponding limiting groove.

Optionally, a driving motor is arranged on the two-gear gearbox of the model vehicle, and an output shaft of the driving motor is connected with a driving gear;

the driving gear is meshed with the driving gear.

By adopting the technical scheme, the utility model has the following beneficial effects:

the first low-speed matching gear of the two-gear gearbox of the model vehicle is provided with the gear part and the combining part, the diameter of the combining part is larger than that of the gear part, the combining groove can be conveniently arranged on the combining part, the problem that the combining groove cannot be arranged or is inconvenient due to the small diameter of the first low-speed matching gear is solved, and the two-gear gearbox is good in structural stability and longer in service life.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic structural view of a two-gear gearbox of a model vehicle according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a two-gear gearbox of a model vehicle according to an embodiment of the present utility model, with a second low-speed mating gear and a second high-speed mating gear removed;

FIG. 3 is a schematic structural view of a first low-speed gear of a two-speed gearbox of a model vehicle according to a first embodiment of the present utility model;

FIG. 4 is a schematic structural diagram of a second view angle of a first low-speed mating gear of a two-speed gearbox of a model vehicle according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a coupling sleeve for a two-speed gearbox of a model vehicle according to an embodiment of the present utility model;

FIG. 6 is a schematic structural view of a first high-speed mating gear of a two-speed gearbox of a model vehicle according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a second low-speed gear of a two-speed gearbox of a model vehicle according to an embodiment of the present utility model;

FIG. 8 is a schematic structural view of a second high-speed mating gear of a two-speed gearbox of a model vehicle according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a two-gear gearbox of a model vehicle, with a first low-speed matching gear removed, according to an embodiment of the present utility model.

In the figure, a first transmission shaft 1, a driving gear 11, a first high-speed mating gear 2, a first low-speed mating gear 3, a gear portion 31, a first shaft hole 311, a coupling portion 32, a coupling groove a, a transition section 33, a second shaft hole 321, a coupling sleeve 4, a coupling tooth 41, a second transmission shaft 5, a second low-speed mating gear 51, a second high-speed mating gear 52, a stop lever 53, a gear shifting member 6, a moving shaft 61, a shift fork 62, a driving motor 7, a driving gear 71, a first bearing 8, a second bearing 9, and a stop groove b.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 and 9, the present utility model provides a two-gear gearbox of a model vehicle, comprising: the gear shifting device comprises a first transmission shaft 1, a first high-speed matched gear 2, a first low-speed matched gear 3, a combining sleeve 4, a second transmission shaft 5 and a gear shifting component 6. The first transmission shaft 1 is provided with a driving gear 11, the first high-speed matching gear 2 is rotatably sleeved on the first transmission shaft 1, the first low-speed matching gear 3 comprises a gear part 31 and a combining part 32, the combining part 32 is connected with the gear part 31, and the combining part 32 and the gear part 31 are sequentially arranged along the length direction of the first transmission shaft 1. The combining sleeve 4 is slidably sleeved on the first transmission shaft 1, the combining sleeve 4 can synchronously rotate with the first transmission shaft 1, and the combining sleeve 4 is positioned between the combining part 32 and the first high-speed matched gear 2. The second transmission shaft 5 is provided with a second low-speed mating gear 51 and a second high-speed mating gear 52, the second low-speed mating gear 51 is meshed with the first low-speed mating gear 3, and the second high-speed mating gear 52 is meshed with the first high-speed mating gear 2. The shift component 6 includes a moving shaft 61 and a shifting fork 62, the shifting fork 62 is connected to the moving shaft 61, the shifting fork 62 is rotatably connected to the coupling sleeve 4, and the shifting fork 62 can drive the coupling sleeve 4 to move along the first transmission shaft 1, so that the coupling sleeve 4 is combined with any one of the coupling portion 32 and the first high-speed mating gear 2, and after being combined, the corresponding gear can be driven to rotate. The first low-speed matching gear 3 of the two-gear gearbox of the model vehicle is provided with the gear part 31 and the combining part 32, the diameter of the combining part 32 is larger than that of the gear part 31, the combining groove a can be conveniently arranged on the combining part 32, the problem that the first low-speed matching gear is inconvenient or the combining groove a cannot be arranged due to small diameter is solved, and the model vehicle is good in structural stability and longer in service life.

The coupling portion 32 is provided at one end thereof facing away from the gear portion 31 with a coupling groove a as shown in fig. 4, the first high-speed mating gear 2 is provided at one end thereof facing toward the coupling portion 32 with a coupling groove a as shown in fig. 6, and both sides of the coupling sleeve 4 are respectively provided with coupling teeth 41 as shown in fig. 5. The engaging teeth 41 on one side of the engaging sleeve 4 can be engaged with the engaging grooves a on the engaging portion 32 when the engaging sleeve 4 is moved in the first direction, and the engaging teeth 41 on the other side of the engaging sleeve 4 can be engaged with the engaging grooves a on the first high-speed mating gear 2 when the engaging sleeve 4 is moved in the second direction. When the shift shaft 61 of the shift member 6 drives the shift fork 62 to move along the first direction, the shift fork 62 drives the coupling sleeve 4 to move toward the first low-speed mating gear 3, the coupling teeth 41 on the adjacent side of the coupling sleeve 4 and the first low-speed mating gear 3 are embedded into the coupling groove a on the coupling portion 32, at this time, the rotation of the coupling sleeve 4 can drive the first low-speed mating gear 3 to rotate, and the rotation of the first low-speed mating gear 3 with a smaller diameter can drive the second low-speed mating gear 51 with a larger diameter to rotate, so as to realize the low-speed rotation of the second low-speed mating gear 51. When the shift fork 62 is driven by the moving shaft 61 of the shift member 6 to move along the second direction, the shift fork 62 drives the coupling sleeve 4 to move to one side of the first high-speed mating gear 2, the coupling teeth 41 on the other side of the coupling sleeve 4 are embedded into the coupling grooves a on the first high-speed mating gear 2, the first high-speed mating gear 2 with a larger diameter is driven to rotate by the rotation of the coupling sleeve 4, and the second high-speed mating gear 52 with a smaller diameter is driven to rotate by the rotation of the first high-speed mating gear 2, so that the high-speed rotation of the second high-speed mating gear 52 is realized.

As shown in fig. 3 and 4, the outer diameter of the coupling portion 32 is larger than the outer diameter of the gear portion 31, so that a coupling groove a is provided on the coupling portion 32 to be coupled with the coupling sleeve 4.

As shown in fig. 4, the coupling groove a on the coupling portion 32 includes two arc-shaped grooves extending around the circumference of the first transmission shaft 1. The combination convex teeth 41 on two sides of the combination sleeve 4 are also arc convex teeth, the outer surface of the arc convex teeth has the same structure with the inner surface of the arc groove, and when the arc convex teeth extend into the arc groove, the outer surface of the arc convex teeth are attached to the inner surface of the arc groove, and the combination sleeve 4 can rotate to drive the combination part 32 to rotate. The surface of the combining groove a is arc-shaped, when the combining part 32 is connected with the combining sleeve 4, the arc-shaped structure can adjust the alignment position, the alignment difficulty of the combining convex teeth 41 and the combining groove a is reduced, and the combining part 32 is convenient to be connected with the combining sleeve 4 accurately.

As shown in fig. 3, the coupling portion 32 and the gear portion 31 are provided at intervals, and a transition section 33 is provided between the coupling portion 32 and the gear portion 31. Axial misalignment of the first low-speed mating gear 3 and the second low-speed mating gear 51 may occur during the engagement rotation, and without the transition section 33, the second low-speed mating gear 51 may collide with the coupling sleeve 4 during the rotation, which may cause friction damage between the second low-speed mating gear 51 and the coupling portion 32. By providing the transition section 33 between the coupling portion 32 and the gear portion 31, the second low-speed mating gear 51 and the coupling portion 32 can be kept away from each other without interfering with each other, so that a good meshing state can be maintained between the first low-speed mating gear 3 and the second low-speed mating gear 51.

In one possible embodiment, as shown in fig. 3, the gear portion 31 has a first shaft hole 311, as shown in fig. 4, the joint portion 32 has a second shaft hole 321, the first transmission shaft 1 is disposed through the first shaft hole 311 and the second shaft hole 321, as shown in fig. 9, a first bearing 8 is disposed between an inner wall of the first shaft hole 311 and the first transmission shaft 1, and a second bearing 9 is disposed between an inner wall of the second shaft hole 321 and the first transmission shaft 1. The diameter of the gear portion 31 is small, the diameter of the coupling portion 32 is much larger than the diameter of the gear portion 31, the first shaft hole 311 and the second shaft hole 321 are not easily set to the same diameter, the first shaft hole 311 is smaller than the diameter of the second shaft hole 321, and the first bearing 8 is smaller than the diameter of the second bearing 9.

The second transmission shaft 5 is provided with a limiting hole (not shown), as shown in fig. 2, a limiting rod 53 penetrates through the limiting hole, as shown in fig. 7 and 8, the second high-speed mating gear 52 and the second low-speed mating gear 51 are both provided with limiting grooves b, and the limiting rod 53 is embedded in the corresponding limiting groove b in a state that the second high-speed mating gear 52 or the second low-speed mating gear 51 is mounted on the second transmission shaft 5. When the first low-speed matching gear 3 rotates to drive the second low-speed matching gear 51 to rotate, the second low-speed matching gear 51 rotates to drive the limiting rod 53 in the limiting groove b to rotate so as to drive the second transmission shaft 5 to rotate at a low speed, and the second transmission shaft 5 rotates at a low speed to drive the output end gear on the second transmission shaft to rotate at a low speed, so that the low-speed output of the two-gear gearbox of the model vehicle is realized. When the first high-speed matching gear 2 rotates to drive the second high-speed matching gear 52 to rotate, the second high-speed matching gear 52 rotates to drive the limiting rod 53 in the limiting groove b to rotate so as to drive the second transmission shaft 5 to rotate at a high speed, and the second transmission shaft 5 rotates to drive the output end gear on the second transmission shaft to rotate at a high speed, so that the high-speed output of the two-gear gearbox of the model vehicle is realized.

In one possible embodiment, as shown in fig. 1, the two-gear gearbox of the model vehicle comprises a driving motor 7, an output shaft of the driving motor 7 is connected with a driving gear 71, and the driving gear 71 is meshed with a driving gear 11. When the driving motor 7 works to drive the output shaft to rotate, the driving gear 71 rotates to drive the driving gear 11 to rotate, the driving gear 11 and the first transmission shaft 1 integrally rotate, and the first transmission shaft 1 rotates to drive the joint sleeve on the driving gear 11 to rotate. When the shifting fork 62 is driven by the moving shaft 61 of the gear shifting component 6 to move along the first direction, the shifting fork 62 drives the combining sleeve 4 to slide towards one side of the first low-speed matched gear 3, the combining convex teeth 41 on the side, adjacent to the first low-speed matched gear 3, of the combining sleeve 4 are embedded into the combining groove a on the combining part 32, at the moment, the combining sleeve 4 rotates to drive the first low-speed matched gear 3 to rotate, the first low-speed matched gear 3 with smaller diameter rotates to drive the second low-speed matched gear 51 with larger diameter to rotate, low-speed rotation of the second low-speed matched gear 51 is achieved, the second low-speed matched gear 51 rotates to drive the limiting rod 53 in the limiting groove b to rotate to drive the second transmission shaft 5 to rotate at a low speed, and the second transmission shaft 5 rotates to drive the output end gear on the second transmission shaft to rotate at a low speed, so that low-speed output of the two-speed gearbox of the model vehicle is achieved.

When the shifting fork 62 is driven by the moving shaft 61 of the gear shifting component 6 to move along the second direction, the shifting fork 62 drives the combining sleeve 4 to move towards one side of the first high-speed matched gear 2, the combining convex teeth 41 on the other side of the combining sleeve 4 are embedded into the combining groove a on the first high-speed matched gear 2, the combining sleeve 4 rotates to drive the first high-speed matched gear 2 to rotate, the first high-speed matched gear 2 with larger diameter rotates to drive the second high-speed matched gear 52 with smaller diameter to rotate, high-speed rotation of the second high-speed matched gear 52 is achieved, at the moment, the second high-speed matched gear 52 rotates to drive the limiting rod 53 in the limiting groove b to rotate to drive the second transmission shaft 5 to rotate at a high speed, and the second transmission shaft 5 rotates to drive the output end gear on the second transmission shaft to rotate at a high speed, so that high-speed output of the two-speed gearbox of the model vehicle is achieved. The power is transmitted through the driving motor 7, and the gear shifting part 6 shifts gears, so that the high-low two-gear speed change state of the two-gear speed change box of the model vehicle is realized.

The present utility model is not limited to the above embodiments, but is capable of being modified or varied in all ways within the scope of the appended claims.

Claims (8)

1. A two-speed gearbox for a model vehicle, comprising:

the first transmission shaft is provided with a driving gear;

the first high-speed matching gear is rotatably sleeved on the first transmission shaft;

the first low-speed matching gear is rotatably sleeved on the first transmission shaft and comprises a gear part and a combining part, the combining part is connected with the gear part, and the combining part and the gear part are sequentially arranged along the length direction of the first transmission shaft;

the combining sleeve is slidably sleeved on the first transmission shaft, can synchronously rotate with the first transmission shaft and is positioned between the combining part and the first high-speed matching gear;

the second transmission shaft is provided with a second low-speed matched gear and a second high-speed matched gear, the second low-speed matched gear is meshed with the first low-speed matched gear, and the second high-speed matched gear is meshed with the first high-speed matched gear;

the gear shifting component comprises a movable shaft and a shifting fork, the shifting fork is connected to the movable shaft, the shifting fork is rotatably connected with the combining sleeve, and the shifting fork can drive the combining sleeve to move along the first transmission shaft by moving, so that the combining sleeve is combined with any one of the combining part and the first high-speed matched gear.

2. The two-speed gearbox of a model vehicle according to claim 1, wherein a combining groove is formed at one end of the combining part facing away from the gear part, and a combining groove is formed at one end of the first high-speed matching gear facing toward the combining part;

the two sides of the combining sleeve are respectively provided with combining convex teeth;

when the combining sleeve moves along the first direction, the combining convex teeth on one side of the combining sleeve can be embedded into the combining grooves on the combining part, and when the combining sleeve moves along the second direction, the combining convex teeth on the other side of the combining sleeve can be embedded into the combining grooves on the first high-speed matching gear.

3. The two-speed gearbox for model vehicles according to claim 2, wherein the outer diameter of the coupling portion is larger than the outer diameter of the gear portion.

4. A two-speed gearbox for a model vehicle according to claim 3, characterised in that the coupling groove in the coupling part comprises two arcuate grooves extending around the circumference of the first drive shaft.

5. A two-speed gearbox for model vehicles according to claim 3, characterised in that the coupling part and the gear part are arranged at intervals, and a transition section is arranged between the coupling part and the gear part.

6. A two-speed gearbox for model vehicles according to claim 3, wherein the gear part is provided with a first shaft hole, and the combining part is provided with a second shaft hole;

the first transmission shaft penetrates through the first shaft hole and the second shaft hole;

a first bearing is arranged between the inner wall of the first shaft hole and the first transmission shaft, and a second bearing is arranged between the inner wall of the second shaft hole and the first transmission shaft.

7. The two-gear gearbox of the model vehicle according to claim 1, wherein a limiting hole is formed in the second transmission shaft, and a limiting rod penetrates through the limiting hole;

the second high-speed matching gear and the second low-speed matching gear are provided with limiting grooves;

and in a state that the second high-speed matched gear or the second low-speed matched gear is arranged on the second transmission shaft, the limiting rod is embedded into the corresponding limiting groove.

8. The two-gear gearbox of the model vehicle according to claim 1, comprising a drive motor, wherein an output shaft of the drive motor is connected with a driving gear;

the driving gear is meshed with the driving gear.